LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 4012 5629 71.3 %
Date: 2024-11-20 05:18:53 Functions: 362 466 77.7 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2021-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  */
       6             : 
       7             : #include "spdk/stdinc.h"
       8             : 
       9             : #include "spdk/bdev.h"
      10             : 
      11             : #include "spdk/accel.h"
      12             : #include "spdk/config.h"
      13             : #include "spdk/env.h"
      14             : #include "spdk/thread.h"
      15             : #include "spdk/likely.h"
      16             : #include "spdk/queue.h"
      17             : #include "spdk/nvme_spec.h"
      18             : #include "spdk/scsi_spec.h"
      19             : #include "spdk/notify.h"
      20             : #include "spdk/util.h"
      21             : #include "spdk/trace.h"
      22             : #include "spdk/dma.h"
      23             : 
      24             : #include "spdk/bdev_module.h"
      25             : #include "spdk/log.h"
      26             : #include "spdk/string.h"
      27             : 
      28             : #include "bdev_internal.h"
      29             : #include "spdk_internal/trace_defs.h"
      30             : #include "spdk_internal/assert.h"
      31             : 
      32             : #ifdef SPDK_CONFIG_VTUNE
      33             : #include "ittnotify.h"
      34             : #include "ittnotify_types.h"
      35             : int __itt_init_ittlib(const char *, __itt_group_id);
      36             : #endif
      37             : 
      38             : #define SPDK_BDEV_IO_POOL_SIZE                  (64 * 1024 - 1)
      39             : #define SPDK_BDEV_IO_CACHE_SIZE                 256
      40             : #define SPDK_BDEV_AUTO_EXAMINE                  true
      41             : #define BUF_SMALL_CACHE_SIZE                    128
      42             : #define BUF_LARGE_CACHE_SIZE                    16
      43             : #define NOMEM_THRESHOLD_COUNT                   8
      44             : 
      45             : #define SPDK_BDEV_QOS_TIMESLICE_IN_USEC         1000
      46             : #define SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE      1
      47             : #define SPDK_BDEV_QOS_MIN_BYTE_PER_TIMESLICE    512
      48             : #define SPDK_BDEV_QOS_MIN_IOS_PER_SEC           1000
      49             : #define SPDK_BDEV_QOS_MIN_BYTES_PER_SEC         (1024 * 1024)
      50             : #define SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC        (UINT64_MAX / (1024 * 1024))
      51             : #define SPDK_BDEV_QOS_LIMIT_NOT_DEFINED         UINT64_MAX
      52             : #define SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC      1000
      53             : 
      54             : /* The maximum number of children requests for a UNMAP or WRITE ZEROES command
      55             :  * when splitting into children requests at a time.
      56             :  */
      57             : #define SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS (8)
      58             : #define BDEV_RESET_CHECK_OUTSTANDING_IO_PERIOD 1000000
      59             : 
      60             : /* The maximum number of children requests for a COPY command
      61             :  * when splitting into children requests at a time.
      62             :  */
      63             : #define SPDK_BDEV_MAX_CHILDREN_COPY_REQS (8)
      64             : 
      65             : #define LOG_ALREADY_CLAIMED_ERROR(detail, bdev) \
      66             :         log_already_claimed(SPDK_LOG_ERROR, __LINE__, __func__, detail, bdev)
      67             : #ifdef DEBUG
      68             : #define LOG_ALREADY_CLAIMED_DEBUG(detail, bdev) \
      69             :         log_already_claimed(SPDK_LOG_DEBUG, __LINE__, __func__, detail, bdev)
      70             : #else
      71             : #define LOG_ALREADY_CLAIMED_DEBUG(detail, bdev) do {} while(0)
      72             : #endif
      73             : 
      74             : static void log_already_claimed(enum spdk_log_level level, const int line, const char *func,
      75             :                                 const char *detail, struct spdk_bdev *bdev);
      76             : 
      77             : static const char *qos_rpc_type[] = {"rw_ios_per_sec",
      78             :                                      "rw_mbytes_per_sec", "r_mbytes_per_sec", "w_mbytes_per_sec"
      79             :                                     };
      80             : 
      81             : TAILQ_HEAD(spdk_bdev_list, spdk_bdev);
      82             : 
      83             : RB_HEAD(bdev_name_tree, spdk_bdev_name);
      84             : 
      85             : static int
      86         551 : bdev_name_cmp(struct spdk_bdev_name *name1, struct spdk_bdev_name *name2)
      87             : {
      88         551 :         return strcmp(name1->name, name2->name);
      89             : }
      90             : 
      91        2048 : RB_GENERATE_STATIC(bdev_name_tree, spdk_bdev_name, node, bdev_name_cmp);
      92             : 
      93             : struct spdk_bdev_mgr {
      94             :         struct spdk_mempool *bdev_io_pool;
      95             : 
      96             :         void *zero_buffer;
      97             : 
      98             :         TAILQ_HEAD(bdev_module_list, spdk_bdev_module) bdev_modules;
      99             : 
     100             :         struct spdk_bdev_list bdevs;
     101             :         struct bdev_name_tree bdev_names;
     102             : 
     103             :         bool init_complete;
     104             :         bool module_init_complete;
     105             : 
     106             :         struct spdk_spinlock spinlock;
     107             : 
     108             :         TAILQ_HEAD(, spdk_bdev_open_async_ctx) async_bdev_opens;
     109             : 
     110             : #ifdef SPDK_CONFIG_VTUNE
     111             :         __itt_domain    *domain;
     112             : #endif
     113             : };
     114             : 
     115             : static struct spdk_bdev_mgr g_bdev_mgr = {
     116             :         .bdev_modules = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdev_modules),
     117             :         .bdevs = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdevs),
     118             :         .bdev_names = RB_INITIALIZER(g_bdev_mgr.bdev_names),
     119             :         .init_complete = false,
     120             :         .module_init_complete = false,
     121             :         .async_bdev_opens = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.async_bdev_opens),
     122             : };
     123             : 
     124             : static void
     125             : __attribute__((constructor))
     126           3 : _bdev_init(void)
     127             : {
     128           3 :         spdk_spin_init(&g_bdev_mgr.spinlock);
     129           3 : }
     130             : 
     131             : typedef void (*lock_range_cb)(struct lba_range *range, void *ctx, int status);
     132             : 
     133             : typedef void (*bdev_copy_bounce_buffer_cpl)(void *ctx, int rc);
     134             : 
     135             : struct lba_range {
     136             :         struct spdk_bdev                *bdev;
     137             :         uint64_t                        offset;
     138             :         uint64_t                        length;
     139             :         bool                            quiesce;
     140             :         void                            *locked_ctx;
     141             :         struct spdk_thread              *owner_thread;
     142             :         struct spdk_bdev_channel        *owner_ch;
     143             :         TAILQ_ENTRY(lba_range)          tailq;
     144             :         TAILQ_ENTRY(lba_range)          tailq_module;
     145             : };
     146             : 
     147             : static struct spdk_bdev_opts    g_bdev_opts = {
     148             :         .bdev_io_pool_size = SPDK_BDEV_IO_POOL_SIZE,
     149             :         .bdev_io_cache_size = SPDK_BDEV_IO_CACHE_SIZE,
     150             :         .bdev_auto_examine = SPDK_BDEV_AUTO_EXAMINE,
     151             :         .iobuf_small_cache_size = BUF_SMALL_CACHE_SIZE,
     152             :         .iobuf_large_cache_size = BUF_LARGE_CACHE_SIZE,
     153             : };
     154             : 
     155             : static spdk_bdev_init_cb        g_init_cb_fn = NULL;
     156             : static void                     *g_init_cb_arg = NULL;
     157             : 
     158             : static spdk_bdev_fini_cb        g_fini_cb_fn = NULL;
     159             : static void                     *g_fini_cb_arg = NULL;
     160             : static struct spdk_thread       *g_fini_thread = NULL;
     161             : 
     162             : struct spdk_bdev_qos_limit {
     163             :         /** IOs or bytes allowed per second (i.e., 1s). */
     164             :         uint64_t limit;
     165             : 
     166             :         /** Remaining IOs or bytes allowed in current timeslice (e.g., 1ms).
     167             :          *  For remaining bytes, allowed to run negative if an I/O is submitted when
     168             :          *  some bytes are remaining, but the I/O is bigger than that amount. The
     169             :          *  excess will be deducted from the next timeslice.
     170             :          */
     171             :         int64_t remaining_this_timeslice;
     172             : 
     173             :         /** Minimum allowed IOs or bytes to be issued in one timeslice (e.g., 1ms). */
     174             :         uint32_t min_per_timeslice;
     175             : 
     176             :         /** Maximum allowed IOs or bytes to be issued in one timeslice (e.g., 1ms). */
     177             :         uint32_t max_per_timeslice;
     178             : 
     179             :         /** Function to check whether to queue the IO.
     180             :          * If The IO is allowed to pass, the quota will be reduced correspondingly.
     181             :          */
     182             :         bool (*queue_io)(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io);
     183             : 
     184             :         /** Function to rewind the quota once the IO was allowed to be sent by this
     185             :          * limit but queued due to one of the further limits.
     186             :          */
     187             :         void (*rewind_quota)(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io);
     188             : };
     189             : 
     190             : struct spdk_bdev_qos {
     191             :         /** Types of structure of rate limits. */
     192             :         struct spdk_bdev_qos_limit rate_limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES];
     193             : 
     194             :         /** The channel that all I/O are funneled through. */
     195             :         struct spdk_bdev_channel *ch;
     196             : 
     197             :         /** The thread on which the poller is running. */
     198             :         struct spdk_thread *thread;
     199             : 
     200             :         /** Size of a timeslice in tsc ticks. */
     201             :         uint64_t timeslice_size;
     202             : 
     203             :         /** Timestamp of start of last timeslice. */
     204             :         uint64_t last_timeslice;
     205             : 
     206             :         /** Poller that processes queued I/O commands each time slice. */
     207             :         struct spdk_poller *poller;
     208             : };
     209             : 
     210             : struct spdk_bdev_mgmt_channel {
     211             :         /*
     212             :          * Each thread keeps a cache of bdev_io - this allows
     213             :          *  bdev threads which are *not* DPDK threads to still
     214             :          *  benefit from a per-thread bdev_io cache.  Without
     215             :          *  this, non-DPDK threads fetching from the mempool
     216             :          *  incur a cmpxchg on get and put.
     217             :          */
     218             :         bdev_io_stailq_t per_thread_cache;
     219             :         uint32_t        per_thread_cache_count;
     220             :         uint32_t        bdev_io_cache_size;
     221             : 
     222             :         struct spdk_iobuf_channel iobuf;
     223             : 
     224             :         TAILQ_HEAD(, spdk_bdev_shared_resource) shared_resources;
     225             :         TAILQ_HEAD(, spdk_bdev_io_wait_entry)   io_wait_queue;
     226             : };
     227             : 
     228             : /*
     229             :  * Per-module (or per-io_device) data. Multiple bdevs built on the same io_device
     230             :  * will queue here their IO that awaits retry. It makes it possible to retry sending
     231             :  * IO to one bdev after IO from other bdev completes.
     232             :  */
     233             : struct spdk_bdev_shared_resource {
     234             :         /* The bdev management channel */
     235             :         struct spdk_bdev_mgmt_channel *mgmt_ch;
     236             : 
     237             :         /*
     238             :          * Count of I/O submitted to bdev module and waiting for completion.
     239             :          * Incremented before submit_request() is called on an spdk_bdev_io.
     240             :          */
     241             :         uint64_t                io_outstanding;
     242             : 
     243             :         /*
     244             :          * Queue of IO awaiting retry because of a previous NOMEM status returned
     245             :          *  on this channel.
     246             :          */
     247             :         bdev_io_tailq_t         nomem_io;
     248             : 
     249             :         /*
     250             :          * Threshold which io_outstanding must drop to before retrying nomem_io.
     251             :          */
     252             :         uint64_t                nomem_threshold;
     253             : 
     254             :         /* I/O channel allocated by a bdev module */
     255             :         struct spdk_io_channel  *shared_ch;
     256             : 
     257             :         struct spdk_poller      *nomem_poller;
     258             : 
     259             :         /* Refcount of bdev channels using this resource */
     260             :         uint32_t                ref;
     261             : 
     262             :         TAILQ_ENTRY(spdk_bdev_shared_resource) link;
     263             : };
     264             : 
     265             : #define BDEV_CH_RESET_IN_PROGRESS       (1 << 0)
     266             : #define BDEV_CH_QOS_ENABLED             (1 << 1)
     267             : 
     268             : struct spdk_bdev_channel {
     269             :         struct spdk_bdev        *bdev;
     270             : 
     271             :         /* The channel for the underlying device */
     272             :         struct spdk_io_channel  *channel;
     273             : 
     274             :         /* Accel channel */
     275             :         struct spdk_io_channel  *accel_channel;
     276             : 
     277             :         /* Per io_device per thread data */
     278             :         struct spdk_bdev_shared_resource *shared_resource;
     279             : 
     280             :         struct spdk_bdev_io_stat *stat;
     281             : 
     282             :         /*
     283             :          * Count of I/O submitted to the underlying dev module through this channel
     284             :          * and waiting for completion.
     285             :          */
     286             :         uint64_t                io_outstanding;
     287             : 
     288             :         /*
     289             :          * List of all submitted I/Os including I/O that are generated via splitting.
     290             :          */
     291             :         bdev_io_tailq_t         io_submitted;
     292             : 
     293             :         /*
     294             :          * List of spdk_bdev_io that are currently queued because they write to a locked
     295             :          * LBA range.
     296             :          */
     297             :         bdev_io_tailq_t         io_locked;
     298             : 
     299             :         /* List of I/Os with accel sequence being currently executed */
     300             :         bdev_io_tailq_t         io_accel_exec;
     301             : 
     302             :         /* List of I/Os doing memory domain pull/push */
     303             :         bdev_io_tailq_t         io_memory_domain;
     304             : 
     305             :         uint32_t                flags;
     306             : 
     307             :         /* Counts number of bdev_io in the io_submitted TAILQ */
     308             :         uint16_t                queue_depth;
     309             : 
     310             :         uint16_t                trace_id;
     311             : 
     312             :         struct spdk_histogram_data *histogram;
     313             : 
     314             : #ifdef SPDK_CONFIG_VTUNE
     315             :         uint64_t                start_tsc;
     316             :         uint64_t                interval_tsc;
     317             :         __itt_string_handle     *handle;
     318             :         struct spdk_bdev_io_stat *prev_stat;
     319             : #endif
     320             : 
     321             :         bdev_io_tailq_t         queued_resets;
     322             : 
     323             :         lba_range_tailq_t       locked_ranges;
     324             : 
     325             :         /** List of I/Os queued by QoS. */
     326             :         bdev_io_tailq_t         qos_queued_io;
     327             : };
     328             : 
     329             : struct media_event_entry {
     330             :         struct spdk_bdev_media_event    event;
     331             :         TAILQ_ENTRY(media_event_entry)  tailq;
     332             : };
     333             : 
     334             : #define MEDIA_EVENT_POOL_SIZE 64
     335             : 
     336             : struct spdk_bdev_desc {
     337             :         struct spdk_bdev                *bdev;
     338             :         bool                            write;
     339             :         bool                            memory_domains_supported;
     340             :         bool                            accel_sequence_supported[SPDK_BDEV_NUM_IO_TYPES];
     341             :         struct spdk_bdev_open_opts      opts;
     342             :         struct spdk_thread              *thread;
     343             :         struct {
     344             :                 spdk_bdev_event_cb_t event_fn;
     345             :                 void *ctx;
     346             :         }                               callback;
     347             :         bool                            closed;
     348             :         struct spdk_spinlock            spinlock;
     349             :         uint32_t                        refs;
     350             :         TAILQ_HEAD(, media_event_entry) pending_media_events;
     351             :         TAILQ_HEAD(, media_event_entry) free_media_events;
     352             :         struct media_event_entry        *media_events_buffer;
     353             :         TAILQ_ENTRY(spdk_bdev_desc)     link;
     354             : 
     355             :         uint64_t                timeout_in_sec;
     356             :         spdk_bdev_io_timeout_cb cb_fn;
     357             :         void                    *cb_arg;
     358             :         struct spdk_poller      *io_timeout_poller;
     359             :         struct spdk_bdev_module_claim   *claim;
     360             : };
     361             : 
     362             : struct spdk_bdev_iostat_ctx {
     363             :         struct spdk_bdev_io_stat *stat;
     364             :         enum spdk_bdev_reset_stat_mode reset_mode;
     365             :         spdk_bdev_get_device_stat_cb cb;
     366             :         void *cb_arg;
     367             : };
     368             : 
     369             : struct set_qos_limit_ctx {
     370             :         void (*cb_fn)(void *cb_arg, int status);
     371             :         void *cb_arg;
     372             :         struct spdk_bdev *bdev;
     373             : };
     374             : 
     375             : struct spdk_bdev_channel_iter {
     376             :         spdk_bdev_for_each_channel_msg fn;
     377             :         spdk_bdev_for_each_channel_done cpl;
     378             :         struct spdk_io_channel_iter *i;
     379             :         void *ctx;
     380             : };
     381             : 
     382             : struct spdk_bdev_io_error_stat {
     383             :         uint32_t error_status[-SPDK_MIN_BDEV_IO_STATUS];
     384             : };
     385             : 
     386             : enum bdev_io_retry_state {
     387             :         BDEV_IO_RETRY_STATE_INVALID,
     388             :         BDEV_IO_RETRY_STATE_PULL,
     389             :         BDEV_IO_RETRY_STATE_PULL_MD,
     390             :         BDEV_IO_RETRY_STATE_SUBMIT,
     391             :         BDEV_IO_RETRY_STATE_PUSH,
     392             :         BDEV_IO_RETRY_STATE_PUSH_MD,
     393             : };
     394             : 
     395             : #define __bdev_to_io_dev(bdev)          (((char *)bdev) + 1)
     396             : #define __bdev_from_io_dev(io_dev)      ((struct spdk_bdev *)(((char *)io_dev) - 1))
     397             : #define __io_ch_to_bdev_ch(io_ch)       ((struct spdk_bdev_channel *)spdk_io_channel_get_ctx(io_ch))
     398             : #define __io_ch_to_bdev_mgmt_ch(io_ch)  ((struct spdk_bdev_mgmt_channel *)spdk_io_channel_get_ctx(io_ch))
     399             : 
     400             : static inline void bdev_io_complete(void *ctx);
     401             : static inline void bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io);
     402             : static void bdev_io_push_bounce_md_buf(struct spdk_bdev_io *bdev_io);
     403             : static void bdev_io_push_bounce_data(struct spdk_bdev_io *bdev_io);
     404             : 
     405             : static void bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
     406             : static int bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io);
     407             : 
     408             : static void bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
     409             :                                 struct spdk_io_channel *ch, void *_ctx);
     410             : static void bdev_enable_qos_done(struct spdk_bdev *bdev, void *_ctx, int status);
     411             : 
     412             : static int bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
     413             :                                      struct iovec *iov, int iovcnt, void *md_buf, uint64_t offset_blocks,
     414             :                                      uint64_t num_blocks,
     415             :                                      struct spdk_memory_domain *domain, void *domain_ctx,
     416             :                                      struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
     417             :                                      spdk_bdev_io_completion_cb cb, void *cb_arg);
     418             : static int bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
     419             :                                       struct iovec *iov, int iovcnt, void *md_buf,
     420             :                                       uint64_t offset_blocks, uint64_t num_blocks,
     421             :                                       struct spdk_memory_domain *domain, void *domain_ctx,
     422             :                                       struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
     423             :                                       uint32_t nvme_cdw12_raw, uint32_t nvme_cdw13_raw,
     424             :                                       spdk_bdev_io_completion_cb cb, void *cb_arg);
     425             : 
     426             : static int bdev_lock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
     427             :                                uint64_t offset, uint64_t length,
     428             :                                lock_range_cb cb_fn, void *cb_arg);
     429             : 
     430             : static int bdev_unlock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
     431             :                                  uint64_t offset, uint64_t length,
     432             :                                  lock_range_cb cb_fn, void *cb_arg);
     433             : 
     434             : static bool bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_io *bio_to_abort);
     435             : static bool bdev_abort_buf_io(struct spdk_bdev_mgmt_channel *ch, struct spdk_bdev_io *bio_to_abort);
     436             : 
     437             : static bool claim_type_is_v2(enum spdk_bdev_claim_type type);
     438             : static void bdev_desc_release_claims(struct spdk_bdev_desc *desc);
     439             : static void claim_reset(struct spdk_bdev *bdev);
     440             : 
     441             : static void bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch);
     442             : 
     443             : static bool bdev_io_should_split(struct spdk_bdev_io *bdev_io);
     444             : 
     445             : #define bdev_get_ext_io_opt(opts, field, defval) \
     446             :         ((opts) != NULL ? SPDK_GET_FIELD(opts, field, defval) : (defval))
     447             : 
     448             : static inline void
     449         669 : bdev_ch_add_to_io_submitted(struct spdk_bdev_io *bdev_io)
     450             : {
     451         669 :         TAILQ_INSERT_TAIL(&bdev_io->internal.ch->io_submitted, bdev_io, internal.ch_link);
     452         669 :         bdev_io->internal.ch->queue_depth++;
     453         669 : }
     454             : 
     455             : static inline void
     456         669 : bdev_ch_remove_from_io_submitted(struct spdk_bdev_io *bdev_io)
     457             : {
     458         669 :         TAILQ_REMOVE(&bdev_io->internal.ch->io_submitted, bdev_io, internal.ch_link);
     459         669 :         bdev_io->internal.ch->queue_depth--;
     460         669 : }
     461             : 
     462             : void
     463          14 : spdk_bdev_get_opts(struct spdk_bdev_opts *opts, size_t opts_size)
     464             : {
     465          14 :         if (!opts) {
     466           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
     467           0 :                 return;
     468             :         }
     469             : 
     470          14 :         if (!opts_size) {
     471           0 :                 SPDK_ERRLOG("opts_size should not be zero value\n");
     472           0 :                 return;
     473             :         }
     474             : 
     475          14 :         opts->opts_size = opts_size;
     476             : 
     477             : #define SET_FIELD(field) \
     478             :         if (offsetof(struct spdk_bdev_opts, field) + sizeof(opts->field) <= opts_size) { \
     479             :                 opts->field = g_bdev_opts.field; \
     480             :         } \
     481             : 
     482          14 :         SET_FIELD(bdev_io_pool_size);
     483          14 :         SET_FIELD(bdev_io_cache_size);
     484          14 :         SET_FIELD(bdev_auto_examine);
     485          14 :         SET_FIELD(iobuf_small_cache_size);
     486          14 :         SET_FIELD(iobuf_large_cache_size);
     487             : 
     488             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
     489             :          * and do not forget to add the SET_FIELD statement for your added field. */
     490             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_opts) == 32, "Incorrect size");
     491             : 
     492             : #undef SET_FIELD
     493          14 : }
     494             : 
     495             : int
     496          15 : spdk_bdev_set_opts(struct spdk_bdev_opts *opts)
     497             : {
     498             :         uint32_t min_pool_size;
     499             : 
     500          15 :         if (!opts) {
     501           0 :                 SPDK_ERRLOG("opts cannot be NULL\n");
     502           0 :                 return -1;
     503             :         }
     504             : 
     505          15 :         if (!opts->opts_size) {
     506           1 :                 SPDK_ERRLOG("opts_size inside opts cannot be zero value\n");
     507           1 :                 return -1;
     508             :         }
     509             : 
     510             :         /*
     511             :          * Add 1 to the thread count to account for the extra mgmt_ch that gets created during subsystem
     512             :          *  initialization.  A second mgmt_ch will be created on the same thread when the application starts
     513             :          *  but before the deferred put_io_channel event is executed for the first mgmt_ch.
     514             :          */
     515          14 :         min_pool_size = opts->bdev_io_cache_size * (spdk_thread_get_count() + 1);
     516          14 :         if (opts->bdev_io_pool_size < min_pool_size) {
     517           0 :                 SPDK_ERRLOG("bdev_io_pool_size %" PRIu32 " is not compatible with bdev_io_cache_size %" PRIu32
     518             :                             " and %" PRIu32 " threads\n", opts->bdev_io_pool_size, opts->bdev_io_cache_size,
     519             :                             spdk_thread_get_count());
     520           0 :                 SPDK_ERRLOG("bdev_io_pool_size must be at least %" PRIu32 "\n", min_pool_size);
     521           0 :                 return -1;
     522             :         }
     523             : 
     524             : #define SET_FIELD(field) \
     525             :         if (offsetof(struct spdk_bdev_opts, field) + sizeof(opts->field) <= opts->opts_size) { \
     526             :                 g_bdev_opts.field = opts->field; \
     527             :         } \
     528             : 
     529          14 :         SET_FIELD(bdev_io_pool_size);
     530          14 :         SET_FIELD(bdev_io_cache_size);
     531          14 :         SET_FIELD(bdev_auto_examine);
     532          14 :         SET_FIELD(iobuf_small_cache_size);
     533          14 :         SET_FIELD(iobuf_large_cache_size);
     534             : 
     535          14 :         g_bdev_opts.opts_size = opts->opts_size;
     536             : 
     537             : #undef SET_FIELD
     538             : 
     539          14 :         return 0;
     540          15 : }
     541             : 
     542             : static struct spdk_bdev *
     543         146 : bdev_get_by_name(const char *bdev_name)
     544             : {
     545             :         struct spdk_bdev_name find;
     546             :         struct spdk_bdev_name *res;
     547             : 
     548         146 :         find.name = (char *)bdev_name;
     549         146 :         res = RB_FIND(bdev_name_tree, &g_bdev_mgr.bdev_names, &find);
     550         146 :         if (res != NULL) {
     551         139 :                 return res->bdev;
     552             :         }
     553             : 
     554           7 :         return NULL;
     555         146 : }
     556             : 
     557             : struct spdk_bdev *
     558          16 : spdk_bdev_get_by_name(const char *bdev_name)
     559             : {
     560             :         struct spdk_bdev *bdev;
     561             : 
     562          16 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
     563          16 :         bdev = bdev_get_by_name(bdev_name);
     564          16 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
     565             : 
     566          16 :         return bdev;
     567             : }
     568             : 
     569             : struct bdev_io_status_string {
     570             :         enum spdk_bdev_io_status status;
     571             :         const char *str;
     572             : };
     573             : 
     574             : static const struct bdev_io_status_string bdev_io_status_strings[] = {
     575             :         { SPDK_BDEV_IO_STATUS_AIO_ERROR, "aio_error" },
     576             :         { SPDK_BDEV_IO_STATUS_ABORTED, "aborted" },
     577             :         { SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED, "first_fused_failed" },
     578             :         { SPDK_BDEV_IO_STATUS_MISCOMPARE, "miscompare" },
     579             :         { SPDK_BDEV_IO_STATUS_NOMEM, "nomem" },
     580             :         { SPDK_BDEV_IO_STATUS_SCSI_ERROR, "scsi_error" },
     581             :         { SPDK_BDEV_IO_STATUS_NVME_ERROR, "nvme_error" },
     582             :         { SPDK_BDEV_IO_STATUS_FAILED, "failed" },
     583             :         { SPDK_BDEV_IO_STATUS_PENDING, "pending" },
     584             :         { SPDK_BDEV_IO_STATUS_SUCCESS, "success" },
     585             : };
     586             : 
     587             : static const char *
     588           0 : bdev_io_status_get_string(enum spdk_bdev_io_status status)
     589             : {
     590             :         uint32_t i;
     591             : 
     592           0 :         for (i = 0; i < SPDK_COUNTOF(bdev_io_status_strings); i++) {
     593           0 :                 if (bdev_io_status_strings[i].status == status) {
     594           0 :                         return bdev_io_status_strings[i].str;
     595             :                 }
     596           0 :         }
     597             : 
     598           0 :         return "reserved";
     599           0 : }
     600             : 
     601             : struct spdk_bdev_wait_for_examine_ctx {
     602             :         struct spdk_poller              *poller;
     603             :         spdk_bdev_wait_for_examine_cb   cb_fn;
     604             :         void                            *cb_arg;
     605             : };
     606             : 
     607             : static bool bdev_module_all_actions_completed(void);
     608             : 
     609             : static int
     610         193 : bdev_wait_for_examine_cb(void *arg)
     611             : {
     612         193 :         struct spdk_bdev_wait_for_examine_ctx *ctx = arg;
     613             : 
     614         193 :         if (!bdev_module_all_actions_completed()) {
     615           0 :                 return SPDK_POLLER_IDLE;
     616             :         }
     617             : 
     618         193 :         spdk_poller_unregister(&ctx->poller);
     619         193 :         ctx->cb_fn(ctx->cb_arg);
     620         193 :         free(ctx);
     621             : 
     622         193 :         return SPDK_POLLER_BUSY;
     623         193 : }
     624             : 
     625             : int
     626         193 : spdk_bdev_wait_for_examine(spdk_bdev_wait_for_examine_cb cb_fn, void *cb_arg)
     627             : {
     628             :         struct spdk_bdev_wait_for_examine_ctx *ctx;
     629             : 
     630         193 :         ctx = calloc(1, sizeof(*ctx));
     631         193 :         if (ctx == NULL) {
     632           0 :                 return -ENOMEM;
     633             :         }
     634         193 :         ctx->cb_fn = cb_fn;
     635         193 :         ctx->cb_arg = cb_arg;
     636         193 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_wait_for_examine_cb, ctx, 0);
     637             : 
     638         193 :         return 0;
     639         193 : }
     640             : 
     641             : struct spdk_bdev_examine_item {
     642             :         char *name;
     643             :         TAILQ_ENTRY(spdk_bdev_examine_item) link;
     644             : };
     645             : 
     646             : TAILQ_HEAD(spdk_bdev_examine_allowlist, spdk_bdev_examine_item);
     647             : 
     648             : struct spdk_bdev_examine_allowlist g_bdev_examine_allowlist = TAILQ_HEAD_INITIALIZER(
     649             :                         g_bdev_examine_allowlist);
     650             : 
     651             : static inline bool
     652           6 : bdev_examine_allowlist_check(const char *name)
     653             : {
     654             :         struct spdk_bdev_examine_item *item;
     655           6 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     656           0 :                 if (strcmp(name, item->name) == 0) {
     657           0 :                         return true;
     658             :                 }
     659           0 :         }
     660           6 :         return false;
     661           6 : }
     662             : 
     663             : static inline void
     664          65 : bdev_examine_allowlist_free(void)
     665             : {
     666             :         struct spdk_bdev_examine_item *item;
     667          65 :         while (!TAILQ_EMPTY(&g_bdev_examine_allowlist)) {
     668           0 :                 item = TAILQ_FIRST(&g_bdev_examine_allowlist);
     669           0 :                 TAILQ_REMOVE(&g_bdev_examine_allowlist, item, link);
     670           0 :                 free(item->name);
     671           0 :                 free(item);
     672             :         }
     673          65 : }
     674             : 
     675             : static inline bool
     676           3 : bdev_in_examine_allowlist(struct spdk_bdev *bdev)
     677             : {
     678             :         struct spdk_bdev_alias *tmp;
     679           3 :         if (bdev_examine_allowlist_check(bdev->name)) {
     680           0 :                 return true;
     681             :         }
     682           6 :         TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
     683           3 :                 if (bdev_examine_allowlist_check(tmp->alias.name)) {
     684           0 :                         return true;
     685             :                 }
     686           3 :         }
     687           3 :         return false;
     688           3 : }
     689             : 
     690             : static inline bool
     691         126 : bdev_ok_to_examine(struct spdk_bdev *bdev)
     692             : {
     693             :         /* Some bdevs may not support the READ command.
     694             :          * Do not try to examine them.
     695             :          */
     696         126 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_READ)) {
     697           0 :                 return false;
     698             :         }
     699             : 
     700         126 :         if (g_bdev_opts.bdev_auto_examine) {
     701         123 :                 return true;
     702             :         } else {
     703           3 :                 return bdev_in_examine_allowlist(bdev);
     704             :         }
     705         126 : }
     706             : 
     707             : static void
     708         126 : bdev_examine(struct spdk_bdev *bdev)
     709             : {
     710             :         struct spdk_bdev_module *module;
     711             :         struct spdk_bdev_module_claim *claim, *tmpclaim;
     712             :         uint32_t action;
     713             : 
     714         126 :         if (!bdev_ok_to_examine(bdev)) {
     715           3 :                 return;
     716             :         }
     717             : 
     718         504 :         TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
     719         381 :                 if (module->examine_config) {
     720         258 :                         spdk_spin_lock(&module->internal.spinlock);
     721         258 :                         action = module->internal.action_in_progress;
     722         258 :                         module->internal.action_in_progress++;
     723         258 :                         spdk_spin_unlock(&module->internal.spinlock);
     724         258 :                         module->examine_config(bdev);
     725         258 :                         if (action != module->internal.action_in_progress) {
     726           0 :                                 SPDK_ERRLOG("examine_config for module %s did not call "
     727             :                                             "spdk_bdev_module_examine_done()\n", module->name);
     728           0 :                         }
     729         258 :                 }
     730         381 :         }
     731             : 
     732         123 :         spdk_spin_lock(&bdev->internal.spinlock);
     733             : 
     734         123 :         switch (bdev->internal.claim_type) {
     735             :         case SPDK_BDEV_CLAIM_NONE:
     736             :                 /* Examine by all bdev modules */
     737         479 :                 TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
     738         361 :                         if (module->examine_disk) {
     739         234 :                                 spdk_spin_lock(&module->internal.spinlock);
     740         234 :                                 module->internal.action_in_progress++;
     741         234 :                                 spdk_spin_unlock(&module->internal.spinlock);
     742         234 :                                 spdk_spin_unlock(&bdev->internal.spinlock);
     743         234 :                                 module->examine_disk(bdev);
     744         234 :                                 spdk_spin_lock(&bdev->internal.spinlock);
     745         234 :                         }
     746         361 :                 }
     747         118 :                 break;
     748             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
     749             :                 /* Examine by the one bdev module with a v1 claim */
     750           1 :                 module = bdev->internal.claim.v1.module;
     751           1 :                 if (module->examine_disk) {
     752           1 :                         spdk_spin_lock(&module->internal.spinlock);
     753           1 :                         module->internal.action_in_progress++;
     754           1 :                         spdk_spin_unlock(&module->internal.spinlock);
     755           1 :                         spdk_spin_unlock(&bdev->internal.spinlock);
     756           1 :                         module->examine_disk(bdev);
     757           1 :                         return;
     758             :                 }
     759           0 :                 break;
     760             :         default:
     761             :                 /* Examine by all bdev modules with a v2 claim */
     762           4 :                 assert(claim_type_is_v2(bdev->internal.claim_type));
     763             :                 /*
     764             :                  * Removal of tailq nodes while iterating can cause the iteration to jump out of the
     765             :                  * list, perhaps accessing freed memory. Without protection, this could happen
     766             :                  * while the lock is dropped during the examine callback.
     767             :                  */
     768           4 :                 bdev->internal.examine_in_progress++;
     769             : 
     770           9 :                 TAILQ_FOREACH(claim, &bdev->internal.claim.v2.claims, link) {
     771           5 :                         module = claim->module;
     772             : 
     773           5 :                         if (module == NULL) {
     774             :                                 /* This is a vestigial claim, held by examine_count */
     775           0 :                                 continue;
     776             :                         }
     777             : 
     778           5 :                         if (module->examine_disk == NULL) {
     779           0 :                                 continue;
     780             :                         }
     781             : 
     782           5 :                         spdk_spin_lock(&module->internal.spinlock);
     783           5 :                         module->internal.action_in_progress++;
     784           5 :                         spdk_spin_unlock(&module->internal.spinlock);
     785             : 
     786             :                         /* Call examine_disk without holding internal.spinlock. */
     787           5 :                         spdk_spin_unlock(&bdev->internal.spinlock);
     788           5 :                         module->examine_disk(bdev);
     789           5 :                         spdk_spin_lock(&bdev->internal.spinlock);
     790           5 :                 }
     791             : 
     792           4 :                 assert(bdev->internal.examine_in_progress > 0);
     793           4 :                 bdev->internal.examine_in_progress--;
     794           4 :                 if (bdev->internal.examine_in_progress == 0) {
     795             :                         /* Remove any claims that were released during examine_disk */
     796           9 :                         TAILQ_FOREACH_SAFE(claim, &bdev->internal.claim.v2.claims, link, tmpclaim) {
     797           5 :                                 if (claim->desc != NULL) {
     798           5 :                                         continue;
     799             :                                 }
     800             : 
     801           0 :                                 TAILQ_REMOVE(&bdev->internal.claim.v2.claims, claim, link);
     802           0 :                                 free(claim);
     803           0 :                         }
     804           4 :                         if (TAILQ_EMPTY(&bdev->internal.claim.v2.claims)) {
     805           0 :                                 claim_reset(bdev);
     806           0 :                         }
     807           4 :                 }
     808           4 :         }
     809             : 
     810         122 :         spdk_spin_unlock(&bdev->internal.spinlock);
     811         126 : }
     812             : 
     813             : int
     814           1 : spdk_bdev_examine(const char *name)
     815             : {
     816             :         struct spdk_bdev *bdev;
     817             :         struct spdk_bdev_examine_item *item;
     818           1 :         struct spdk_thread *thread = spdk_get_thread();
     819             : 
     820           1 :         if (spdk_unlikely(!spdk_thread_is_app_thread(thread))) {
     821           1 :                 SPDK_ERRLOG("Cannot examine bdev %s on thread %p (%s)\n", name, thread,
     822             :                             thread ? spdk_thread_get_name(thread) : "null");
     823           1 :                 return -EINVAL;
     824             :         }
     825             : 
     826           0 :         if (g_bdev_opts.bdev_auto_examine) {
     827           0 :                 SPDK_ERRLOG("Manual examine is not allowed if auto examine is enabled\n");
     828           0 :                 return -EINVAL;
     829             :         }
     830             : 
     831           0 :         if (bdev_examine_allowlist_check(name)) {
     832           0 :                 SPDK_ERRLOG("Duplicate bdev name for manual examine: %s\n", name);
     833           0 :                 return -EEXIST;
     834             :         }
     835             : 
     836           0 :         item = calloc(1, sizeof(*item));
     837           0 :         if (!item) {
     838           0 :                 return -ENOMEM;
     839             :         }
     840           0 :         item->name = strdup(name);
     841           0 :         if (!item->name) {
     842           0 :                 free(item);
     843           0 :                 return -ENOMEM;
     844             :         }
     845           0 :         TAILQ_INSERT_TAIL(&g_bdev_examine_allowlist, item, link);
     846             : 
     847           0 :         bdev = spdk_bdev_get_by_name(name);
     848           0 :         if (bdev) {
     849           0 :                 bdev_examine(bdev);
     850           0 :         }
     851           0 :         return 0;
     852           1 : }
     853             : 
     854             : static inline void
     855           0 : bdev_examine_allowlist_config_json(struct spdk_json_write_ctx *w)
     856             : {
     857             :         struct spdk_bdev_examine_item *item;
     858           0 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     859           0 :                 spdk_json_write_object_begin(w);
     860           0 :                 spdk_json_write_named_string(w, "method", "bdev_examine");
     861           0 :                 spdk_json_write_named_object_begin(w, "params");
     862           0 :                 spdk_json_write_named_string(w, "name", item->name);
     863           0 :                 spdk_json_write_object_end(w);
     864           0 :                 spdk_json_write_object_end(w);
     865           0 :         }
     866           0 : }
     867             : 
     868             : struct spdk_bdev *
     869           1 : spdk_bdev_first(void)
     870             : {
     871             :         struct spdk_bdev *bdev;
     872             : 
     873           1 :         bdev = TAILQ_FIRST(&g_bdev_mgr.bdevs);
     874           1 :         if (bdev) {
     875           1 :                 SPDK_DEBUGLOG(bdev, "Starting bdev iteration at %s\n", bdev->name);
     876           1 :         }
     877             : 
     878           1 :         return bdev;
     879             : }
     880             : 
     881             : struct spdk_bdev *
     882           8 : spdk_bdev_next(struct spdk_bdev *prev)
     883             : {
     884             :         struct spdk_bdev *bdev;
     885             : 
     886           8 :         bdev = TAILQ_NEXT(prev, internal.link);
     887           8 :         if (bdev) {
     888           7 :                 SPDK_DEBUGLOG(bdev, "Continuing bdev iteration at %s\n", bdev->name);
     889           7 :         }
     890             : 
     891           8 :         return bdev;
     892             : }
     893             : 
     894             : static struct spdk_bdev *
     895           6 : _bdev_next_leaf(struct spdk_bdev *bdev)
     896             : {
     897           9 :         while (bdev != NULL) {
     898           8 :                 if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
     899           5 :                         return bdev;
     900             :                 } else {
     901           3 :                         bdev = TAILQ_NEXT(bdev, internal.link);
     902             :                 }
     903             :         }
     904             : 
     905           1 :         return bdev;
     906           6 : }
     907             : 
     908             : struct spdk_bdev *
     909           1 : spdk_bdev_first_leaf(void)
     910             : {
     911             :         struct spdk_bdev *bdev;
     912             : 
     913           1 :         bdev = _bdev_next_leaf(TAILQ_FIRST(&g_bdev_mgr.bdevs));
     914             : 
     915           1 :         if (bdev) {
     916           1 :                 SPDK_DEBUGLOG(bdev, "Starting bdev iteration at %s\n", bdev->name);
     917           1 :         }
     918             : 
     919           1 :         return bdev;
     920             : }
     921             : 
     922             : struct spdk_bdev *
     923           5 : spdk_bdev_next_leaf(struct spdk_bdev *prev)
     924             : {
     925             :         struct spdk_bdev *bdev;
     926             : 
     927           5 :         bdev = _bdev_next_leaf(TAILQ_NEXT(prev, internal.link));
     928             : 
     929           5 :         if (bdev) {
     930           4 :                 SPDK_DEBUGLOG(bdev, "Continuing bdev iteration at %s\n", bdev->name);
     931           4 :         }
     932             : 
     933           5 :         return bdev;
     934             : }
     935             : 
     936             : static inline bool
     937         816 : bdev_io_use_memory_domain(struct spdk_bdev_io *bdev_io)
     938             : {
     939         816 :         return bdev_io->internal.f.has_memory_domain;
     940             : }
     941             : 
     942             : static inline bool
     943        1549 : bdev_io_use_accel_sequence(struct spdk_bdev_io *bdev_io)
     944             : {
     945        1549 :         return bdev_io->internal.f.has_accel_sequence;
     946             : }
     947             : 
     948             : static inline uint32_t
     949         373 : bdev_desc_get_block_size(struct spdk_bdev_desc *desc)
     950             : {
     951         373 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
     952             : 
     953         373 :         if (spdk_unlikely(desc->opts.hide_metadata)) {
     954           0 :                 return bdev->blocklen - bdev->md_len;
     955             :         } else {
     956         373 :                 return bdev->blocklen;
     957             :         }
     958         373 : }
     959             : 
     960             : static inline uint32_t
     961         110 : bdev_io_get_block_size(struct spdk_bdev_io *bdev_io)
     962             : {
     963         110 :         return bdev_desc_get_block_size(bdev_io->internal.desc);
     964             : }
     965             : 
     966             : static inline void
     967           7 : bdev_queue_nomem_io_head(struct spdk_bdev_shared_resource *shared_resource,
     968             :                          struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
     969             : {
     970             :         /* Wait for some of the outstanding I/O to complete before we retry any of the nomem_io.
     971             :          * Normally we will wait for NOMEM_THRESHOLD_COUNT I/O to complete but for low queue depth
     972             :          * channels we will instead wait for half to complete.
     973             :          */
     974           7 :         shared_resource->nomem_threshold = spdk_max((int64_t)shared_resource->io_outstanding / 2,
     975             :                                            (int64_t)shared_resource->io_outstanding - NOMEM_THRESHOLD_COUNT);
     976             : 
     977           7 :         assert(state != BDEV_IO_RETRY_STATE_INVALID);
     978           7 :         bdev_io->internal.retry_state = state;
     979           7 :         TAILQ_INSERT_HEAD(&shared_resource->nomem_io, bdev_io, internal.link);
     980           7 : }
     981             : 
     982             : static inline void
     983          43 : bdev_queue_nomem_io_tail(struct spdk_bdev_shared_resource *shared_resource,
     984             :                          struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
     985             : {
     986             :         /* We only queue IOs at the end of the nomem_io queue if they're submitted by the user while
     987             :          * the queue isn't empty, so we don't need to update the nomem_threshold here */
     988          43 :         assert(!TAILQ_EMPTY(&shared_resource->nomem_io));
     989             : 
     990          43 :         assert(state != BDEV_IO_RETRY_STATE_INVALID);
     991          43 :         bdev_io->internal.retry_state = state;
     992          43 :         TAILQ_INSERT_TAIL(&shared_resource->nomem_io, bdev_io, internal.link);
     993          43 : }
     994             : 
     995             : void
     996          16 : spdk_bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf, size_t len)
     997             : {
     998             :         struct iovec *iovs;
     999             : 
    1000          16 :         if (bdev_io->u.bdev.iovs == NULL) {
    1001           3 :                 bdev_io->u.bdev.iovs = &bdev_io->iov;
    1002           3 :                 bdev_io->u.bdev.iovcnt = 1;
    1003           3 :         }
    1004             : 
    1005          16 :         iovs = bdev_io->u.bdev.iovs;
    1006             : 
    1007          16 :         assert(iovs != NULL);
    1008          16 :         assert(bdev_io->u.bdev.iovcnt >= 1);
    1009             : 
    1010          16 :         iovs[0].iov_base = buf;
    1011          16 :         iovs[0].iov_len = len;
    1012          16 : }
    1013             : 
    1014             : void
    1015           3 : spdk_bdev_io_set_md_buf(struct spdk_bdev_io *bdev_io, void *md_buf, size_t len)
    1016             : {
    1017           3 :         assert((len / spdk_bdev_get_md_size(bdev_io->bdev)) >= bdev_io->u.bdev.num_blocks);
    1018           3 :         bdev_io->u.bdev.md_buf = md_buf;
    1019           3 : }
    1020             : 
    1021             : static bool
    1022         167 : _is_buf_allocated(const struct iovec *iovs)
    1023             : {
    1024         167 :         if (iovs == NULL) {
    1025           6 :                 return false;
    1026             :         }
    1027             : 
    1028         161 :         return iovs[0].iov_base != NULL;
    1029         167 : }
    1030             : 
    1031             : static bool
    1032          50 : _are_iovs_aligned(struct iovec *iovs, int iovcnt, uint32_t alignment)
    1033             : {
    1034             :         int i;
    1035             :         uintptr_t iov_base;
    1036             : 
    1037          50 :         if (spdk_likely(alignment == 1)) {
    1038          21 :                 return true;
    1039             :         }
    1040             : 
    1041          36 :         for (i = 0; i < iovcnt; i++) {
    1042          29 :                 iov_base = (uintptr_t)iovs[i].iov_base;
    1043          29 :                 if ((iov_base & (alignment - 1)) != 0) {
    1044          22 :                         return false;
    1045             :                 }
    1046           7 :         }
    1047             : 
    1048           7 :         return true;
    1049          50 : }
    1050             : 
    1051             : static inline bool
    1052         292 : bdev_io_needs_metadata(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    1053             : {
    1054         292 :         return desc->opts.hide_metadata && bdev_io->bdev->md_len != 0;
    1055             : }
    1056             : 
    1057             : static inline bool
    1058         852 : bdev_io_needs_sequence_exec(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    1059             : {
    1060         852 :         if (!bdev_io_use_accel_sequence(bdev_io)) {
    1061         852 :                 return false;
    1062             :         }
    1063             : 
    1064             :         /* For now, we don't allow splitting IOs with an accel sequence and will treat them as if
    1065             :          * bdev module didn't support accel sequences */
    1066           0 :         return !desc->accel_sequence_supported[bdev_io->type] || bdev_io->internal.f.split;
    1067         852 : }
    1068             : 
    1069             : static inline void
    1070         592 : bdev_io_increment_outstanding(struct spdk_bdev_channel *bdev_ch,
    1071             :                               struct spdk_bdev_shared_resource *shared_resource)
    1072             : {
    1073         592 :         bdev_ch->io_outstanding++;
    1074         592 :         shared_resource->io_outstanding++;
    1075         592 : }
    1076             : 
    1077             : static inline void
    1078         592 : bdev_io_decrement_outstanding(struct spdk_bdev_channel *bdev_ch,
    1079             :                               struct spdk_bdev_shared_resource *shared_resource)
    1080             : {
    1081         592 :         assert(bdev_ch->io_outstanding > 0);
    1082         592 :         assert(shared_resource->io_outstanding > 0);
    1083         592 :         bdev_ch->io_outstanding--;
    1084         592 :         shared_resource->io_outstanding--;
    1085         592 : }
    1086             : 
    1087             : static void
    1088           0 : bdev_io_submit_sequence_cb(void *ctx, int status)
    1089             : {
    1090           0 :         struct spdk_bdev_io *bdev_io = ctx;
    1091             : 
    1092           0 :         assert(bdev_io_use_accel_sequence(bdev_io));
    1093             : 
    1094           0 :         bdev_io->u.bdev.accel_sequence = NULL;
    1095           0 :         bdev_io->internal.f.has_accel_sequence = false;
    1096             : 
    1097           0 :         if (spdk_unlikely(status != 0)) {
    1098           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    1099           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1100           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    1101           0 :                 return;
    1102             :         }
    1103             : 
    1104           0 :         bdev_io_submit(bdev_io);
    1105           0 : }
    1106             : 
    1107             : static void
    1108           0 : bdev_io_exec_sequence_cb(void *ctx, int status)
    1109             : {
    1110           0 :         struct spdk_bdev_io *bdev_io = ctx;
    1111           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1112             : 
    1113           0 :         TAILQ_REMOVE(&bdev_io->internal.ch->io_accel_exec, bdev_io, internal.link);
    1114           0 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1115             : 
    1116           0 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1117           0 :                 bdev_ch_retry_io(ch);
    1118           0 :         }
    1119             : 
    1120           0 :         bdev_io->internal.data_transfer_cpl(bdev_io, status);
    1121           0 : }
    1122             : 
    1123             : static void
    1124           0 : bdev_io_exec_sequence(struct spdk_bdev_io *bdev_io, void (*cb_fn)(void *ctx, int status))
    1125             : {
    1126           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1127             : 
    1128           0 :         assert(bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io));
    1129           0 :         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE || bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1130           0 :         assert(bdev_io_use_accel_sequence(bdev_io));
    1131             : 
    1132             :         /* Since the operations are appended during submission, they're in the opposite order than
    1133             :          * how we want to execute them for reads (i.e. we need to execute the most recently added
    1134             :          * operation first), so reverse the sequence before executing it.
    1135             :          */
    1136           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1137           0 :                 spdk_accel_sequence_reverse(bdev_io->internal.accel_sequence);
    1138           0 :         }
    1139             : 
    1140           0 :         TAILQ_INSERT_TAIL(&bdev_io->internal.ch->io_accel_exec, bdev_io, internal.link);
    1141           0 :         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1142           0 :         bdev_io->internal.data_transfer_cpl = cb_fn;
    1143             : 
    1144           0 :         spdk_accel_sequence_finish(bdev_io->internal.accel_sequence,
    1145           0 :                                    bdev_io_exec_sequence_cb, bdev_io);
    1146           0 : }
    1147             : 
    1148             : static void
    1149          42 : bdev_io_get_buf_complete(struct spdk_bdev_io *bdev_io, bool status)
    1150             : {
    1151          42 :         struct spdk_io_channel *ch = spdk_bdev_io_get_io_channel(bdev_io);
    1152             :         void *buf;
    1153             : 
    1154          42 :         if (spdk_unlikely(bdev_io->internal.get_aux_buf_cb != NULL)) {
    1155           0 :                 buf = bdev_io->internal.buf.ptr;
    1156           0 :                 bdev_io->internal.buf.ptr = NULL;
    1157           0 :                 bdev_io->internal.f.has_buf = false;
    1158           0 :                 bdev_io->internal.get_aux_buf_cb(ch, bdev_io, buf);
    1159           0 :                 bdev_io->internal.get_aux_buf_cb = NULL;
    1160           0 :         } else {
    1161          42 :                 assert(bdev_io->internal.get_buf_cb != NULL);
    1162          42 :                 bdev_io->internal.get_buf_cb(ch, bdev_io, status);
    1163          42 :                 bdev_io->internal.get_buf_cb = NULL;
    1164             :         }
    1165          42 : }
    1166             : 
    1167             : static void
    1168           4 : _bdev_io_pull_buffer_cpl(void *ctx, int rc)
    1169             : {
    1170           4 :         struct spdk_bdev_io *bdev_io = ctx;
    1171             : 
    1172           4 :         if (rc) {
    1173           0 :                 SPDK_ERRLOG("Set bounce buffer failed with rc %d\n", rc);
    1174           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1175           0 :         }
    1176           4 :         bdev_io_get_buf_complete(bdev_io, !rc);
    1177           4 : }
    1178             : 
    1179             : static void
    1180           2 : bdev_io_pull_md_buf_done(void *ctx, int status)
    1181             : {
    1182           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1183           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1184             : 
    1185           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1186           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1187             : 
    1188           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1189           0 :                 bdev_ch_retry_io(ch);
    1190           0 :         }
    1191             : 
    1192           2 :         assert(bdev_io->internal.data_transfer_cpl);
    1193           2 :         bdev_io->internal.data_transfer_cpl(bdev_io, status);
    1194           2 : }
    1195             : 
    1196             : static void
    1197           4 : bdev_io_pull_md_buf(struct spdk_bdev_io *bdev_io)
    1198             : {
    1199           4 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1200           4 :         int rc = 0;
    1201             : 
    1202           4 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1203           2 :                 assert(bdev_io->internal.f.has_bounce_buf);
    1204           2 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1205           2 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1206           2 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1207           4 :                         rc = spdk_memory_domain_pull_data(bdev_io->internal.memory_domain,
    1208           2 :                                                           bdev_io->internal.memory_domain_ctx,
    1209           2 :                                                           &bdev_io->internal.bounce_buf.orig_md_iov, 1,
    1210           2 :                                                           &bdev_io->internal.bounce_buf.md_iov, 1,
    1211           2 :                                                           bdev_io_pull_md_buf_done, bdev_io);
    1212           2 :                         if (rc == 0) {
    1213             :                                 /* Continue to submit IO in completion callback */
    1214           2 :                                 return;
    1215             :                         }
    1216           0 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1217           0 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1218           0 :                         if (rc != -ENOMEM) {
    1219           0 :                                 SPDK_ERRLOG("Failed to pull data from memory domain %s, rc %d\n",
    1220             :                                             spdk_memory_domain_get_dma_device_id(
    1221             :                                                     bdev_io->internal.memory_domain), rc);
    1222           0 :                         }
    1223           0 :                 } else {
    1224           0 :                         memcpy(bdev_io->internal.bounce_buf.md_iov.iov_base,
    1225           0 :                                bdev_io->internal.bounce_buf.orig_md_iov.iov_base,
    1226           0 :                                bdev_io->internal.bounce_buf.orig_md_iov.iov_len);
    1227             :                 }
    1228           0 :         }
    1229             : 
    1230           2 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1231           0 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL_MD);
    1232           0 :         } else {
    1233           2 :                 assert(bdev_io->internal.data_transfer_cpl);
    1234           2 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1235             :         }
    1236           4 : }
    1237             : 
    1238             : static void
    1239           4 : _bdev_io_pull_bounce_md_buf(struct spdk_bdev_io *bdev_io, void *md_buf, size_t len)
    1240             : {
    1241           4 :         assert(bdev_io->internal.f.has_bounce_buf);
    1242             : 
    1243             :         /* save original md_buf */
    1244           4 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_base = bdev_io->u.bdev.md_buf;
    1245           4 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_len = len;
    1246           4 :         bdev_io->internal.bounce_buf.md_iov.iov_base = md_buf;
    1247           4 :         bdev_io->internal.bounce_buf.md_iov.iov_len = len;
    1248             :         /* set bounce md_buf */
    1249           4 :         bdev_io->u.bdev.md_buf = md_buf;
    1250             : 
    1251           4 :         bdev_io_pull_md_buf(bdev_io);
    1252           4 : }
    1253             : 
    1254             : static void
    1255          42 : _bdev_io_set_md_buf(struct spdk_bdev_io *bdev_io)
    1256             : {
    1257          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1258             :         uint64_t md_len;
    1259             :         void *buf;
    1260             : 
    1261          42 :         if (spdk_bdev_is_md_separate(bdev)) {
    1262           7 :                 assert(!bdev_io_use_accel_sequence(bdev_io));
    1263             : 
    1264           7 :                 buf = (char *)bdev_io->u.bdev.iovs[0].iov_base + bdev_io->u.bdev.iovs[0].iov_len;
    1265           7 :                 md_len = bdev_io->u.bdev.num_blocks * bdev->md_len;
    1266             : 
    1267           7 :                 assert(((uintptr_t)buf & (spdk_bdev_get_buf_align(bdev) - 1)) == 0);
    1268             : 
    1269           7 :                 if (bdev_io->u.bdev.md_buf != NULL) {
    1270           4 :                         _bdev_io_pull_bounce_md_buf(bdev_io, buf, md_len);
    1271           4 :                         return;
    1272             :                 } else {
    1273           3 :                         spdk_bdev_io_set_md_buf(bdev_io, buf, md_len);
    1274             :                 }
    1275           3 :         }
    1276             : 
    1277          38 :         bdev_io_get_buf_complete(bdev_io, true);
    1278          42 : }
    1279             : 
    1280             : static inline void
    1281          26 : bdev_io_pull_data_done(struct spdk_bdev_io *bdev_io, int rc)
    1282             : {
    1283          26 :         if (rc) {
    1284           0 :                 SPDK_ERRLOG("Failed to get data buffer\n");
    1285           0 :                 assert(bdev_io->internal.data_transfer_cpl);
    1286           0 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1287           0 :                 return;
    1288             :         }
    1289             : 
    1290          26 :         _bdev_io_set_md_buf(bdev_io);
    1291          26 : }
    1292             : 
    1293             : static void
    1294           2 : bdev_io_pull_data_done_and_track(void *ctx, int status)
    1295             : {
    1296           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1297           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1298             : 
    1299           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1300           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1301             : 
    1302           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1303           0 :                 bdev_ch_retry_io(ch);
    1304           0 :         }
    1305             : 
    1306           2 :         bdev_io_pull_data_done(bdev_io, status);
    1307           2 : }
    1308             : 
    1309             : static void
    1310          27 : bdev_io_pull_data(struct spdk_bdev_io *bdev_io)
    1311             : {
    1312          27 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1313          27 :         int rc = 0;
    1314             : 
    1315             :         /* If we need to exec an accel sequence or the IO uses a memory domain buffer and has a
    1316             :          * sequence, append a copy operation making accel change the src/dst buffers of the previous
    1317             :          * operation */
    1318          27 :         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io) ||
    1319          27 :             (bdev_io_use_accel_sequence(bdev_io) && bdev_io_use_memory_domain(bdev_io))) {
    1320           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1321           0 :                         assert(bdev_io_use_accel_sequence(bdev_io));
    1322           0 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1323           0 :                         rc = spdk_accel_append_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1324           0 :                                                     bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1325             :                                                     NULL, NULL,
    1326           0 :                                                     bdev_io->internal.bounce_buf.orig_iovs,
    1327           0 :                                                     bdev_io->internal.bounce_buf.orig_iovcnt,
    1328           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1329           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1330             :                                                     NULL, NULL);
    1331           0 :                 } else {
    1332             :                         /* We need to reverse the src/dst for reads */
    1333           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1334           0 :                         assert(bdev_io_use_accel_sequence(bdev_io));
    1335           0 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1336           0 :                         rc = spdk_accel_append_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1337           0 :                                                     bdev_io->internal.bounce_buf.orig_iovs,
    1338           0 :                                                     bdev_io->internal.bounce_buf.orig_iovcnt,
    1339           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1340           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1341           0 :                                                     bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1342             :                                                     NULL, NULL, NULL, NULL);
    1343             :                 }
    1344             : 
    1345           0 :                 if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    1346           0 :                         SPDK_ERRLOG("Failed to append copy to accel sequence: %p\n",
    1347             :                                     bdev_io->internal.accel_sequence);
    1348           0 :                 }
    1349          27 :         } else if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1350             :                 /* if this is write path, copy data from original buffer to bounce buffer */
    1351          17 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1352           3 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1353           3 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1354           3 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1355           6 :                         rc = spdk_memory_domain_pull_data(bdev_io->internal.memory_domain,
    1356           3 :                                                           bdev_io->internal.memory_domain_ctx,
    1357           3 :                                                           bdev_io->internal.bounce_buf.orig_iovs,
    1358           3 :                                                           (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1359           3 :                                                           bdev_io->u.bdev.iovs, 1,
    1360             :                                                           bdev_io_pull_data_done_and_track,
    1361           3 :                                                           bdev_io);
    1362           3 :                         if (rc == 0) {
    1363             :                                 /* Continue to submit IO in completion callback */
    1364           2 :                                 return;
    1365             :                         }
    1366           1 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1367           1 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1368           1 :                         if (rc != -ENOMEM) {
    1369           0 :                                 SPDK_ERRLOG("Failed to pull data from memory domain %s\n",
    1370             :                                             spdk_memory_domain_get_dma_device_id(
    1371             :                                                     bdev_io->internal.memory_domain));
    1372           0 :                         }
    1373           1 :                 } else {
    1374          14 :                         assert(bdev_io->u.bdev.iovcnt == 1);
    1375          14 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1376          28 :                         spdk_copy_iovs_to_buf(bdev_io->u.bdev.iovs[0].iov_base,
    1377          14 :                                               bdev_io->u.bdev.iovs[0].iov_len,
    1378          14 :                                               bdev_io->internal.bounce_buf.orig_iovs,
    1379          14 :                                               bdev_io->internal.bounce_buf.orig_iovcnt);
    1380             :                 }
    1381          15 :         }
    1382             : 
    1383          25 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1384           1 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL);
    1385           1 :         } else {
    1386          24 :                 bdev_io_pull_data_done(bdev_io, rc);
    1387             :         }
    1388          27 : }
    1389             : 
    1390             : static void
    1391          26 : _bdev_io_pull_bounce_data_buf(struct spdk_bdev_io *bdev_io, void *buf, size_t len,
    1392             :                               bdev_copy_bounce_buffer_cpl cpl_cb)
    1393             : {
    1394          26 :         struct spdk_bdev_shared_resource *shared_resource = bdev_io->internal.ch->shared_resource;
    1395             : 
    1396          26 :         assert(bdev_io->internal.f.has_bounce_buf == false);
    1397             : 
    1398          26 :         bdev_io->internal.data_transfer_cpl = cpl_cb;
    1399          26 :         bdev_io->internal.f.has_bounce_buf = true;
    1400             :         /* save original iovec */
    1401          26 :         bdev_io->internal.bounce_buf.orig_iovs = bdev_io->u.bdev.iovs;
    1402          26 :         bdev_io->internal.bounce_buf.orig_iovcnt = bdev_io->u.bdev.iovcnt;
    1403             :         /* zero the other data members */
    1404          26 :         bdev_io->internal.bounce_buf.iov.iov_base = NULL;
    1405          26 :         bdev_io->internal.bounce_buf.md_iov.iov_base = NULL;
    1406          26 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_base = NULL;
    1407             :         /* set bounce iov */
    1408          26 :         bdev_io->u.bdev.iovs = &bdev_io->internal.bounce_buf.iov;
    1409          26 :         bdev_io->u.bdev.iovcnt = 1;
    1410             :         /* set bounce buffer for this operation */
    1411          26 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    1412          26 :         bdev_io->u.bdev.iovs[0].iov_len = len;
    1413             :         /* Now we use 1 iov, the split condition could have been changed */
    1414          26 :         bdev_io->internal.f.split = bdev_io_should_split(bdev_io);
    1415             : 
    1416          26 :         if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
    1417           0 :                 bdev_queue_nomem_io_tail(shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL);
    1418           0 :         } else {
    1419          26 :                 bdev_io_pull_data(bdev_io);
    1420             :         }
    1421          26 : }
    1422             : 
    1423             : static void
    1424          42 : _bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf, uint64_t len)
    1425             : {
    1426          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1427             :         bool buf_allocated;
    1428             :         uint64_t alignment;
    1429             :         void *aligned_buf;
    1430             : 
    1431          42 :         bdev_io->internal.buf.ptr = buf;
    1432          42 :         bdev_io->internal.f.has_buf = true;
    1433             : 
    1434          42 :         if (spdk_unlikely(bdev_io->internal.get_aux_buf_cb != NULL)) {
    1435           0 :                 bdev_io_get_buf_complete(bdev_io, true);
    1436           0 :                 return;
    1437             :         }
    1438             : 
    1439          42 :         alignment = spdk_bdev_get_buf_align(bdev);
    1440          42 :         buf_allocated = _is_buf_allocated(bdev_io->u.bdev.iovs);
    1441          42 :         aligned_buf = (void *)(((uintptr_t)buf + (alignment - 1)) & ~(alignment - 1));
    1442             : 
    1443          42 :         if (buf_allocated) {
    1444          26 :                 _bdev_io_pull_bounce_data_buf(bdev_io, aligned_buf, len, _bdev_io_pull_buffer_cpl);
    1445             :                 /* Continue in completion callback */
    1446          26 :                 return;
    1447             :         } else {
    1448          16 :                 spdk_bdev_io_set_buf(bdev_io, aligned_buf, len);
    1449             :         }
    1450             : 
    1451          16 :         _bdev_io_set_md_buf(bdev_io);
    1452          42 : }
    1453             : 
    1454             : static inline uint64_t
    1455          84 : bdev_io_get_max_buf_len(struct spdk_bdev_io *bdev_io, uint64_t len)
    1456             : {
    1457          84 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1458             :         uint64_t md_len, alignment;
    1459             : 
    1460          84 :         md_len = spdk_bdev_is_md_separate(bdev) ? bdev_io->u.bdev.num_blocks * bdev->md_len : 0;
    1461             : 
    1462             :         /* 1 byte alignment needs 0 byte of extra space, 64 bytes alignment needs 63 bytes of extra space, etc. */
    1463          84 :         alignment = spdk_bdev_get_buf_align(bdev) - 1;
    1464             : 
    1465          84 :         return len + alignment + md_len;
    1466             : }
    1467             : 
    1468             : static void
    1469          42 : _bdev_io_put_buf(struct spdk_bdev_io *bdev_io, void *buf, uint64_t buf_len)
    1470             : {
    1471             :         struct spdk_bdev_mgmt_channel *ch;
    1472             : 
    1473          42 :         ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    1474          42 :         spdk_iobuf_put(&ch->iobuf, buf, bdev_io_get_max_buf_len(bdev_io, buf_len));
    1475          42 : }
    1476             : 
    1477             : static void
    1478          42 : bdev_io_put_buf(struct spdk_bdev_io *bdev_io)
    1479             : {
    1480          42 :         assert(bdev_io->internal.f.has_buf);
    1481          42 :         _bdev_io_put_buf(bdev_io, bdev_io->internal.buf.ptr, bdev_io->internal.buf.len);
    1482          42 :         bdev_io->internal.buf.ptr = NULL;
    1483          42 :         bdev_io->internal.f.has_buf = false;
    1484          42 : }
    1485             : 
    1486           3 : SPDK_LOG_DEPRECATION_REGISTER(spdk_bdev_io_put_aux_buf,
    1487             :                               "spdk_bdev_io_put_aux_buf is deprecated", "v25.01", 0);
    1488             : 
    1489             : void
    1490           0 : spdk_bdev_io_put_aux_buf(struct spdk_bdev_io *bdev_io, void *buf)
    1491             : {
    1492           0 :         uint64_t len = bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen;
    1493             : 
    1494           0 :         SPDK_LOG_DEPRECATED(spdk_bdev_io_put_aux_buf);
    1495             : 
    1496           0 :         assert(buf != NULL);
    1497           0 :         _bdev_io_put_buf(bdev_io, buf, len);
    1498           0 : }
    1499             : 
    1500             : static inline void
    1501         548 : bdev_submit_request(struct spdk_bdev *bdev, struct spdk_io_channel *ioch,
    1502             :                     struct spdk_bdev_io *bdev_io)
    1503             : {
    1504             :         /* After a request is submitted to a bdev module, the ownership of an accel sequence
    1505             :          * associated with that bdev_io is transferred to the bdev module. So, clear the internal
    1506             :          * sequence pointer to make sure we won't touch it anymore. */
    1507        1014 :         if ((bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE ||
    1508         548 :              bdev_io->type == SPDK_BDEV_IO_TYPE_READ) && bdev_io->u.bdev.accel_sequence != NULL) {
    1509           0 :                 assert(!bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io));
    1510           0 :                 bdev_io->internal.f.has_accel_sequence = false;
    1511           0 :         }
    1512             : 
    1513         548 :         bdev->fn_table->submit_request(ioch, bdev_io);
    1514         548 : }
    1515             : 
    1516             : static inline void
    1517          10 : bdev_ch_resubmit_io(struct spdk_bdev_shared_resource *shared_resource, struct spdk_bdev_io *bdev_io)
    1518             : {
    1519          10 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1520             : 
    1521          10 :         bdev_io_increment_outstanding(bdev_io->internal.ch, shared_resource);
    1522          10 :         bdev_io->internal.error.nvme.cdw0 = 0;
    1523          10 :         bdev_io->num_retries++;
    1524          10 :         bdev_submit_request(bdev, spdk_bdev_io_get_io_channel(bdev_io), bdev_io);
    1525          10 : }
    1526             : 
    1527             : static void
    1528          63 : bdev_shared_ch_retry_io(struct spdk_bdev_shared_resource *shared_resource)
    1529             : {
    1530             :         struct spdk_bdev_io *bdev_io;
    1531             : 
    1532          63 :         if (shared_resource->io_outstanding > shared_resource->nomem_threshold) {
    1533             :                 /*
    1534             :                  * Allow some more I/O to complete before retrying the nomem_io queue.
    1535             :                  *  Some drivers (such as nvme) cannot immediately take a new I/O in
    1536             :                  *  the context of a completion, because the resources for the I/O are
    1537             :                  *  not released until control returns to the bdev poller.  Also, we
    1538             :                  *  may require several small I/O to complete before a larger I/O
    1539             :                  *  (that requires splitting) can be submitted.
    1540             :                  */
    1541          58 :                 return;
    1542             :         }
    1543             : 
    1544          16 :         while (!TAILQ_EMPTY(&shared_resource->nomem_io)) {
    1545          12 :                 bdev_io = TAILQ_FIRST(&shared_resource->nomem_io);
    1546          12 :                 TAILQ_REMOVE(&shared_resource->nomem_io, bdev_io, internal.link);
    1547             : 
    1548          12 :                 switch (bdev_io->internal.retry_state) {
    1549             :                 case BDEV_IO_RETRY_STATE_SUBMIT:
    1550          10 :                         bdev_ch_resubmit_io(shared_resource, bdev_io);
    1551          10 :                         break;
    1552             :                 case BDEV_IO_RETRY_STATE_PULL:
    1553           1 :                         bdev_io_pull_data(bdev_io);
    1554           1 :                         break;
    1555             :                 case BDEV_IO_RETRY_STATE_PULL_MD:
    1556           0 :                         bdev_io_pull_md_buf(bdev_io);
    1557           0 :                         break;
    1558             :                 case BDEV_IO_RETRY_STATE_PUSH:
    1559           1 :                         bdev_io_push_bounce_data(bdev_io);
    1560           1 :                         break;
    1561             :                 case BDEV_IO_RETRY_STATE_PUSH_MD:
    1562           0 :                         bdev_io_push_bounce_md_buf(bdev_io);
    1563           0 :                         break;
    1564             :                 default:
    1565           0 :                         assert(0 && "invalid retry state");
    1566             :                         break;
    1567             :                 }
    1568             : 
    1569          12 :                 if (bdev_io == TAILQ_FIRST(&shared_resource->nomem_io)) {
    1570             :                         /* This IO completed again with NOMEM status, so break the loop and
    1571             :                          * don't try anymore.  Note that a bdev_io that fails with NOMEM
    1572             :                          * always gets requeued at the front of the list, to maintain
    1573             :                          * ordering.
    1574             :                          */
    1575           1 :                         break;
    1576             :                 }
    1577             :         }
    1578          63 : }
    1579             : 
    1580             : static void
    1581          63 : bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch)
    1582             : {
    1583          63 :         bdev_shared_ch_retry_io(bdev_ch->shared_resource);
    1584          63 : }
    1585             : 
    1586             : static int
    1587           0 : bdev_no_mem_poller(void *ctx)
    1588             : {
    1589           0 :         struct spdk_bdev_shared_resource *shared_resource = ctx;
    1590             : 
    1591           0 :         spdk_poller_unregister(&shared_resource->nomem_poller);
    1592             : 
    1593           0 :         if (!TAILQ_EMPTY(&shared_resource->nomem_io)) {
    1594           0 :                 bdev_shared_ch_retry_io(shared_resource);
    1595           0 :         }
    1596             :         /* the retry cb may re-register the poller so double check */
    1597           0 :         if (!TAILQ_EMPTY(&shared_resource->nomem_io) &&
    1598           0 :             shared_resource->io_outstanding == 0 && shared_resource->nomem_poller == NULL) {
    1599             :                 /* No IOs were submitted, try again */
    1600           0 :                 shared_resource->nomem_poller = SPDK_POLLER_REGISTER(bdev_no_mem_poller, shared_resource,
    1601             :                                                 SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * 10);
    1602           0 :         }
    1603             : 
    1604           0 :         return SPDK_POLLER_BUSY;
    1605             : }
    1606             : 
    1607             : static inline bool
    1608         556 : _bdev_io_handle_no_mem(struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
    1609             : {
    1610         556 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    1611         556 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    1612             : 
    1613         556 :         if (spdk_unlikely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM)) {
    1614           5 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    1615           5 :                 bdev_queue_nomem_io_head(shared_resource, bdev_io, state);
    1616             : 
    1617           5 :                 if (shared_resource->io_outstanding == 0 && !shared_resource->nomem_poller) {
    1618             :                         /* Special case when we have nomem IOs and no outstanding IOs which completions
    1619             :                          * could trigger retry of queued IOs
    1620             :                          * Any IOs submitted may trigger retry of queued IOs. This poller handles a case when no
    1621             :                          * new IOs submitted, e.g. qd==1 */
    1622           0 :                         shared_resource->nomem_poller = SPDK_POLLER_REGISTER(bdev_no_mem_poller, shared_resource,
    1623             :                                                         SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * 10);
    1624           0 :                 }
    1625             :                 /* If bdev module completed an I/O that has an accel sequence with NOMEM status, the
    1626             :                  * ownership of that sequence is transferred back to the bdev layer, so we need to
    1627             :                  * restore internal.accel_sequence to make sure that the sequence is handled
    1628             :                  * correctly in case the I/O is later aborted. */
    1629           5 :                 if ((bdev_io->type == SPDK_BDEV_IO_TYPE_READ ||
    1630           5 :                      bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) && bdev_io->u.bdev.accel_sequence) {
    1631           0 :                         assert(!bdev_io_use_accel_sequence(bdev_io));
    1632           0 :                         bdev_io->internal.f.has_accel_sequence = true;
    1633           0 :                         bdev_io->internal.accel_sequence = bdev_io->u.bdev.accel_sequence;
    1634           0 :                 }
    1635             : 
    1636           5 :                 return true;
    1637             :         }
    1638             : 
    1639         551 :         if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
    1640          63 :                 bdev_ch_retry_io(bdev_ch);
    1641          63 :         }
    1642             : 
    1643         551 :         return false;
    1644         556 : }
    1645             : 
    1646             : static void
    1647          26 : _bdev_io_complete_push_bounce_done(void *ctx, int rc)
    1648             : {
    1649          26 :         struct spdk_bdev_io *bdev_io = ctx;
    1650          26 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1651             : 
    1652          26 :         if (rc) {
    1653           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1654           0 :         }
    1655             :         /* We want to free the bounce buffer here since we know we're done with it (as opposed
    1656             :          * to waiting for the conditional free of internal.buf.ptr in spdk_bdev_free_io()).
    1657             :          */
    1658          26 :         bdev_io_put_buf(bdev_io);
    1659             : 
    1660          26 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1661           0 :                 bdev_ch_retry_io(ch);
    1662           0 :         }
    1663             : 
    1664             :         /* Continue with IO completion flow */
    1665          26 :         bdev_io_complete(bdev_io);
    1666          26 : }
    1667             : 
    1668             : static void
    1669           2 : bdev_io_push_bounce_md_buf_done(void *ctx, int rc)
    1670             : {
    1671           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1672           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1673             : 
    1674           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1675           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1676           2 :         bdev_io->internal.f.has_bounce_buf = false;
    1677             : 
    1678           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1679           0 :                 bdev_ch_retry_io(ch);
    1680           0 :         }
    1681             : 
    1682           2 :         bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1683           2 : }
    1684             : 
    1685             : static inline void
    1686          26 : bdev_io_push_bounce_md_buf(struct spdk_bdev_io *bdev_io)
    1687             : {
    1688          26 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1689          26 :         int rc = 0;
    1690             : 
    1691          26 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    1692          26 :         assert(bdev_io->internal.f.has_bounce_buf);
    1693             : 
    1694             :         /* do the same for metadata buffer */
    1695          26 :         if (spdk_unlikely(bdev_io->internal.bounce_buf.orig_md_iov.iov_base != NULL)) {
    1696           4 :                 assert(spdk_bdev_is_md_separate(bdev_io->bdev));
    1697             : 
    1698           4 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1699           2 :                         if (bdev_io_use_memory_domain(bdev_io)) {
    1700           2 :                                 TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1701           2 :                                 bdev_io_increment_outstanding(ch, ch->shared_resource);
    1702             :                                 /* If memory domain is used then we need to call async push function */
    1703           4 :                                 rc = spdk_memory_domain_push_data(bdev_io->internal.memory_domain,
    1704           2 :                                                                   bdev_io->internal.memory_domain_ctx,
    1705           2 :                                                                   &bdev_io->internal.bounce_buf.orig_md_iov,
    1706           2 :                                                                   (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1707           2 :                                                                   &bdev_io->internal.bounce_buf.md_iov, 1,
    1708             :                                                                   bdev_io_push_bounce_md_buf_done,
    1709           2 :                                                                   bdev_io);
    1710           2 :                                 if (rc == 0) {
    1711             :                                         /* Continue IO completion in async callback */
    1712           2 :                                         return;
    1713             :                                 }
    1714           0 :                                 TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1715           0 :                                 bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1716           0 :                                 if (rc != -ENOMEM) {
    1717           0 :                                         SPDK_ERRLOG("Failed to push md to memory domain %s\n",
    1718             :                                                     spdk_memory_domain_get_dma_device_id(
    1719             :                                                             bdev_io->internal.memory_domain));
    1720           0 :                                 }
    1721           0 :                         } else {
    1722           0 :                                 memcpy(bdev_io->internal.bounce_buf.orig_md_iov.iov_base, bdev_io->u.bdev.md_buf,
    1723           0 :                                        bdev_io->internal.bounce_buf.orig_md_iov.iov_len);
    1724             :                         }
    1725           0 :                 }
    1726           2 :         }
    1727             : 
    1728          24 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1729           0 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PUSH_MD);
    1730           0 :         } else {
    1731          24 :                 assert(bdev_io->internal.data_transfer_cpl);
    1732          24 :                 bdev_io->internal.f.has_bounce_buf = false;
    1733          24 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1734             :         }
    1735          26 : }
    1736             : 
    1737             : static inline void
    1738          26 : bdev_io_push_bounce_data_done(struct spdk_bdev_io *bdev_io, int rc)
    1739             : {
    1740          26 :         assert(bdev_io->internal.data_transfer_cpl);
    1741          26 :         if (rc) {
    1742           0 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1743           0 :                 return;
    1744             :         }
    1745             : 
    1746             :         /* set original buffer for this io */
    1747          26 :         bdev_io->u.bdev.iovcnt = bdev_io->internal.bounce_buf.orig_iovcnt;
    1748          26 :         bdev_io->u.bdev.iovs = bdev_io->internal.bounce_buf.orig_iovs;
    1749             : 
    1750             :         /* We don't set bdev_io->internal.f.has_bounce_buf to false here because
    1751             :          * we still need to clear the md buf */
    1752             : 
    1753          26 :         bdev_io_push_bounce_md_buf(bdev_io);
    1754          26 : }
    1755             : 
    1756             : static void
    1757           2 : bdev_io_push_bounce_data_done_and_track(void *ctx, int status)
    1758             : {
    1759           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1760           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1761             : 
    1762           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1763           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1764             : 
    1765           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1766           0 :                 bdev_ch_retry_io(ch);
    1767           0 :         }
    1768             : 
    1769           2 :         bdev_io_push_bounce_data_done(bdev_io, status);
    1770           2 : }
    1771             : 
    1772             : static inline void
    1773          27 : bdev_io_push_bounce_data(struct spdk_bdev_io *bdev_io)
    1774             : {
    1775          27 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1776          27 :         int rc = 0;
    1777             : 
    1778          27 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    1779          27 :         assert(!bdev_io_use_accel_sequence(bdev_io));
    1780          27 :         assert(bdev_io->internal.f.has_bounce_buf);
    1781             : 
    1782             :         /* if this is read path, copy data from bounce buffer to original buffer */
    1783          27 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1784          11 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1785           3 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1786           3 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1787             :                         /* If memory domain is used then we need to call async push function */
    1788           6 :                         rc = spdk_memory_domain_push_data(bdev_io->internal.memory_domain,
    1789           3 :                                                           bdev_io->internal.memory_domain_ctx,
    1790           3 :                                                           bdev_io->internal.bounce_buf.orig_iovs,
    1791           3 :                                                           (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1792           3 :                                                           &bdev_io->internal.bounce_buf.iov, 1,
    1793             :                                                           bdev_io_push_bounce_data_done_and_track,
    1794           3 :                                                           bdev_io);
    1795           3 :                         if (rc == 0) {
    1796             :                                 /* Continue IO completion in async callback */
    1797           2 :                                 return;
    1798             :                         }
    1799             : 
    1800           1 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1801           1 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1802           1 :                         if (rc != -ENOMEM) {
    1803           0 :                                 SPDK_ERRLOG("Failed to push data to memory domain %s\n",
    1804             :                                             spdk_memory_domain_get_dma_device_id(
    1805             :                                                     bdev_io->internal.memory_domain));
    1806           0 :                         }
    1807           1 :                 } else {
    1808          16 :                         spdk_copy_buf_to_iovs(bdev_io->internal.bounce_buf.orig_iovs,
    1809           8 :                                               bdev_io->internal.bounce_buf.orig_iovcnt,
    1810           8 :                                               bdev_io->internal.bounce_buf.iov.iov_base,
    1811           8 :                                               bdev_io->internal.bounce_buf.iov.iov_len);
    1812             :                 }
    1813           9 :         }
    1814             : 
    1815          25 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1816           1 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PUSH);
    1817           1 :         } else {
    1818          24 :                 bdev_io_push_bounce_data_done(bdev_io, rc);
    1819             :         }
    1820          27 : }
    1821             : 
    1822             : static inline void
    1823          26 : _bdev_io_push_bounce_data_buffer(struct spdk_bdev_io *bdev_io, bdev_copy_bounce_buffer_cpl cpl_cb)
    1824             : {
    1825          26 :         bdev_io->internal.data_transfer_cpl = cpl_cb;
    1826          26 :         bdev_io_push_bounce_data(bdev_io);
    1827          26 : }
    1828             : 
    1829             : static void
    1830           0 : bdev_io_get_iobuf_cb(struct spdk_iobuf_entry *iobuf, void *buf)
    1831             : {
    1832             :         struct spdk_bdev_io *bdev_io;
    1833             : 
    1834           0 :         bdev_io = SPDK_CONTAINEROF(iobuf, struct spdk_bdev_io, internal.iobuf);
    1835           0 :         _bdev_io_set_buf(bdev_io, buf, bdev_io->internal.buf.len);
    1836           0 : }
    1837             : 
    1838             : static void
    1839          42 : bdev_io_get_buf(struct spdk_bdev_io *bdev_io, uint64_t len)
    1840             : {
    1841             :         struct spdk_bdev_mgmt_channel *mgmt_ch;
    1842             :         uint64_t max_len;
    1843             :         void *buf;
    1844             : 
    1845          42 :         assert(spdk_bdev_io_get_thread(bdev_io) == spdk_get_thread());
    1846          42 :         mgmt_ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    1847          42 :         max_len = bdev_io_get_max_buf_len(bdev_io, len);
    1848             : 
    1849          42 :         if (spdk_unlikely(max_len > mgmt_ch->iobuf.cache[0].large.bufsize)) {
    1850           0 :                 SPDK_ERRLOG("Length %" PRIu64 " is larger than allowed\n", max_len);
    1851           0 :                 bdev_io_get_buf_complete(bdev_io, false);
    1852           0 :                 return;
    1853             :         }
    1854             : 
    1855          42 :         bdev_io->internal.buf.len = len;
    1856          42 :         buf = spdk_iobuf_get(&mgmt_ch->iobuf, max_len, &bdev_io->internal.iobuf,
    1857             :                              bdev_io_get_iobuf_cb);
    1858          42 :         if (buf != NULL) {
    1859          42 :                 _bdev_io_set_buf(bdev_io, buf, len);
    1860          42 :         }
    1861          42 : }
    1862             : 
    1863             : void
    1864          56 : spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb, uint64_t len)
    1865             : {
    1866          56 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1867             :         uint64_t alignment;
    1868             : 
    1869          56 :         assert(cb != NULL);
    1870          56 :         bdev_io->internal.get_buf_cb = cb;
    1871             : 
    1872          56 :         alignment = spdk_bdev_get_buf_align(bdev);
    1873             : 
    1874          56 :         if (_is_buf_allocated(bdev_io->u.bdev.iovs) &&
    1875          40 :             _are_iovs_aligned(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt, alignment)) {
    1876             :                 /* Buffer already present and aligned */
    1877          18 :                 cb(spdk_bdev_io_get_io_channel(bdev_io), bdev_io, true);
    1878          18 :                 return;
    1879             :         }
    1880             : 
    1881          38 :         bdev_io_get_buf(bdev_io, len);
    1882          56 : }
    1883             : 
    1884             : static void
    1885           4 : _bdev_memory_domain_get_io_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    1886             :                               bool success)
    1887             : {
    1888           4 :         if (!success) {
    1889           0 :                 SPDK_ERRLOG("Failed to get data buffer, completing IO\n");
    1890           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1891           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    1892           0 :                 return;
    1893             :         }
    1894             : 
    1895           4 :         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io)) {
    1896           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1897           0 :                         bdev_io_exec_sequence(bdev_io, bdev_io_submit_sequence_cb);
    1898           0 :                         return;
    1899             :                 }
    1900             :                 /* For reads we'll execute the sequence after the data is read, so, for now, only
    1901             :                  * clear out accel_sequence pointer and submit the IO */
    1902           0 :                 assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1903           0 :                 bdev_io->u.bdev.accel_sequence = NULL;
    1904           0 :         }
    1905             : 
    1906           4 :         bdev_io_submit(bdev_io);
    1907           4 : }
    1908             : 
    1909             : static void
    1910           4 : _bdev_memory_domain_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb,
    1911             :                                uint64_t len)
    1912             : {
    1913           4 :         assert(cb != NULL);
    1914           4 :         bdev_io->internal.get_buf_cb = cb;
    1915             : 
    1916           4 :         bdev_io_get_buf(bdev_io, len);
    1917           4 : }
    1918             : 
    1919             : 
    1920           3 : SPDK_LOG_DEPRECATION_REGISTER(spdk_bdev_io_get_aux_buf,
    1921             :                               "spdk_bdev_io_get_aux_buf is deprecated", "v25.01", 0);
    1922             : 
    1923             : void
    1924           0 : spdk_bdev_io_get_aux_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_aux_buf_cb cb)
    1925             : {
    1926           0 :         uint64_t len = bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen;
    1927             : 
    1928           0 :         SPDK_LOG_DEPRECATED(spdk_bdev_io_get_aux_buf);
    1929             : 
    1930           0 :         assert(cb != NULL);
    1931           0 :         assert(bdev_io->internal.get_aux_buf_cb == NULL);
    1932           0 :         bdev_io->internal.get_aux_buf_cb = cb;
    1933           0 :         bdev_io_get_buf(bdev_io, len);
    1934           0 : }
    1935             : 
    1936             : static int
    1937          65 : bdev_module_get_max_ctx_size(void)
    1938             : {
    1939             :         struct spdk_bdev_module *bdev_module;
    1940          65 :         int max_bdev_module_size = 0;
    1941             : 
    1942         254 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    1943         189 :                 if (bdev_module->get_ctx_size && bdev_module->get_ctx_size() > max_bdev_module_size) {
    1944          64 :                         max_bdev_module_size = bdev_module->get_ctx_size();
    1945          64 :                 }
    1946         189 :         }
    1947             : 
    1948          65 :         return max_bdev_module_size;
    1949             : }
    1950             : 
    1951             : static void
    1952           0 : bdev_enable_histogram_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    1953             : {
    1954           0 :         if (!bdev->internal.histogram_enabled) {
    1955           0 :                 return;
    1956             :         }
    1957             : 
    1958           0 :         spdk_json_write_object_begin(w);
    1959           0 :         spdk_json_write_named_string(w, "method", "bdev_enable_histogram");
    1960             : 
    1961           0 :         spdk_json_write_named_object_begin(w, "params");
    1962           0 :         spdk_json_write_named_string(w, "name", bdev->name);
    1963             : 
    1964           0 :         spdk_json_write_named_bool(w, "enable", bdev->internal.histogram_enabled);
    1965             : 
    1966           0 :         if (bdev->internal.histogram_io_type) {
    1967           0 :                 spdk_json_write_named_string(w, "opc",
    1968           0 :                                              spdk_bdev_get_io_type_name(bdev->internal.histogram_io_type));
    1969           0 :         }
    1970             : 
    1971           0 :         spdk_json_write_object_end(w);
    1972             : 
    1973           0 :         spdk_json_write_object_end(w);
    1974           0 : }
    1975             : 
    1976             : static void
    1977           0 : bdev_qos_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    1978             : {
    1979             :         int i;
    1980           0 :         struct spdk_bdev_qos *qos = bdev->internal.qos;
    1981             :         uint64_t limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES];
    1982             : 
    1983           0 :         if (!qos) {
    1984           0 :                 return;
    1985             :         }
    1986             : 
    1987           0 :         spdk_bdev_get_qos_rate_limits(bdev, limits);
    1988             : 
    1989           0 :         spdk_json_write_object_begin(w);
    1990           0 :         spdk_json_write_named_string(w, "method", "bdev_set_qos_limit");
    1991             : 
    1992           0 :         spdk_json_write_named_object_begin(w, "params");
    1993           0 :         spdk_json_write_named_string(w, "name", bdev->name);
    1994           0 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    1995           0 :                 if (limits[i] > 0) {
    1996           0 :                         spdk_json_write_named_uint64(w, qos_rpc_type[i], limits[i]);
    1997           0 :                 }
    1998           0 :         }
    1999           0 :         spdk_json_write_object_end(w);
    2000             : 
    2001           0 :         spdk_json_write_object_end(w);
    2002           0 : }
    2003             : 
    2004             : void
    2005           0 : spdk_bdev_subsystem_config_json(struct spdk_json_write_ctx *w)
    2006             : {
    2007             :         struct spdk_bdev_module *bdev_module;
    2008             :         struct spdk_bdev *bdev;
    2009             : 
    2010           0 :         assert(w != NULL);
    2011             : 
    2012           0 :         spdk_json_write_array_begin(w);
    2013             : 
    2014           0 :         spdk_json_write_object_begin(w);
    2015           0 :         spdk_json_write_named_string(w, "method", "bdev_set_options");
    2016           0 :         spdk_json_write_named_object_begin(w, "params");
    2017           0 :         spdk_json_write_named_uint32(w, "bdev_io_pool_size", g_bdev_opts.bdev_io_pool_size);
    2018           0 :         spdk_json_write_named_uint32(w, "bdev_io_cache_size", g_bdev_opts.bdev_io_cache_size);
    2019           0 :         spdk_json_write_named_bool(w, "bdev_auto_examine", g_bdev_opts.bdev_auto_examine);
    2020           0 :         spdk_json_write_named_uint32(w, "iobuf_small_cache_size", g_bdev_opts.iobuf_small_cache_size);
    2021           0 :         spdk_json_write_named_uint32(w, "iobuf_large_cache_size", g_bdev_opts.iobuf_large_cache_size);
    2022           0 :         spdk_json_write_object_end(w);
    2023           0 :         spdk_json_write_object_end(w);
    2024             : 
    2025           0 :         bdev_examine_allowlist_config_json(w);
    2026             : 
    2027           0 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2028           0 :                 if (bdev_module->config_json) {
    2029           0 :                         bdev_module->config_json(w);
    2030           0 :                 }
    2031           0 :         }
    2032             : 
    2033           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    2034             : 
    2035           0 :         TAILQ_FOREACH(bdev, &g_bdev_mgr.bdevs, internal.link) {
    2036           0 :                 if (bdev->fn_table->write_config_json) {
    2037           0 :                         bdev->fn_table->write_config_json(bdev, w);
    2038           0 :                 }
    2039             : 
    2040           0 :                 bdev_qos_config_json(bdev, w);
    2041           0 :                 bdev_enable_histogram_config_json(bdev, w);
    2042           0 :         }
    2043             : 
    2044           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    2045             : 
    2046             :         /* This has to be last RPC in array to make sure all bdevs finished examine */
    2047           0 :         spdk_json_write_object_begin(w);
    2048           0 :         spdk_json_write_named_string(w, "method", "bdev_wait_for_examine");
    2049           0 :         spdk_json_write_object_end(w);
    2050             : 
    2051           0 :         spdk_json_write_array_end(w);
    2052           0 : }
    2053             : 
    2054             : static void
    2055          71 : bdev_mgmt_channel_destroy(void *io_device, void *ctx_buf)
    2056             : {
    2057          71 :         struct spdk_bdev_mgmt_channel *ch = ctx_buf;
    2058             :         struct spdk_bdev_io *bdev_io;
    2059             : 
    2060          71 :         spdk_iobuf_channel_fini(&ch->iobuf);
    2061             : 
    2062        9969 :         while (!STAILQ_EMPTY(&ch->per_thread_cache)) {
    2063        9898 :                 bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
    2064        9898 :                 STAILQ_REMOVE_HEAD(&ch->per_thread_cache, internal.buf_link);
    2065        9898 :                 ch->per_thread_cache_count--;
    2066        9898 :                 spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
    2067             :         }
    2068             : 
    2069          71 :         assert(ch->per_thread_cache_count == 0);
    2070          71 : }
    2071             : 
    2072             : static int
    2073          71 : bdev_mgmt_channel_create(void *io_device, void *ctx_buf)
    2074             : {
    2075          71 :         struct spdk_bdev_mgmt_channel *ch = ctx_buf;
    2076             :         struct spdk_bdev_io *bdev_io;
    2077             :         uint32_t i;
    2078             :         int rc;
    2079             : 
    2080         142 :         rc = spdk_iobuf_channel_init(&ch->iobuf, "bdev",
    2081          71 :                                      g_bdev_opts.iobuf_small_cache_size,
    2082          71 :                                      g_bdev_opts.iobuf_large_cache_size);
    2083          71 :         if (rc != 0) {
    2084           0 :                 SPDK_ERRLOG("Failed to create iobuf channel: %s\n", spdk_strerror(-rc));
    2085           0 :                 return -1;
    2086             :         }
    2087             : 
    2088          71 :         STAILQ_INIT(&ch->per_thread_cache);
    2089          71 :         ch->bdev_io_cache_size = g_bdev_opts.bdev_io_cache_size;
    2090             : 
    2091             :         /* Pre-populate bdev_io cache to ensure this thread cannot be starved. */
    2092          71 :         ch->per_thread_cache_count = 0;
    2093        9969 :         for (i = 0; i < ch->bdev_io_cache_size; i++) {
    2094        9898 :                 bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
    2095        9898 :                 if (bdev_io == NULL) {
    2096           0 :                         SPDK_ERRLOG("You need to increase bdev_io_pool_size using bdev_set_options RPC.\n");
    2097           0 :                         assert(false);
    2098             :                         bdev_mgmt_channel_destroy(io_device, ctx_buf);
    2099             :                         return -1;
    2100             :                 }
    2101        9898 :                 ch->per_thread_cache_count++;
    2102        9898 :                 STAILQ_INSERT_HEAD(&ch->per_thread_cache, bdev_io, internal.buf_link);
    2103        9898 :         }
    2104             : 
    2105          71 :         TAILQ_INIT(&ch->shared_resources);
    2106          71 :         TAILQ_INIT(&ch->io_wait_queue);
    2107             : 
    2108          71 :         return 0;
    2109          71 : }
    2110             : 
    2111             : static void
    2112          65 : bdev_init_complete(int rc)
    2113             : {
    2114          65 :         spdk_bdev_init_cb cb_fn = g_init_cb_fn;
    2115          65 :         void *cb_arg = g_init_cb_arg;
    2116             :         struct spdk_bdev_module *m;
    2117             : 
    2118          65 :         g_bdev_mgr.init_complete = true;
    2119          65 :         g_init_cb_fn = NULL;
    2120          65 :         g_init_cb_arg = NULL;
    2121             : 
    2122             :         /*
    2123             :          * For modules that need to know when subsystem init is complete,
    2124             :          * inform them now.
    2125             :          */
    2126          65 :         if (rc == 0) {
    2127         254 :                 TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2128         189 :                         if (m->init_complete) {
    2129          23 :                                 m->init_complete();
    2130          23 :                         }
    2131         189 :                 }
    2132          65 :         }
    2133             : 
    2134          65 :         cb_fn(cb_arg, rc);
    2135          65 : }
    2136             : 
    2137             : static bool
    2138         258 : bdev_module_all_actions_completed(void)
    2139             : {
    2140             :         struct spdk_bdev_module *m;
    2141             : 
    2142        1022 :         TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2143         764 :                 if (m->internal.action_in_progress > 0) {
    2144           0 :                         return false;
    2145             :                 }
    2146         764 :         }
    2147         258 :         return true;
    2148         258 : }
    2149             : 
    2150             : static void
    2151         628 : bdev_module_action_complete(void)
    2152             : {
    2153             :         /*
    2154             :          * Don't finish bdev subsystem initialization if
    2155             :          * module pre-initialization is still in progress, or
    2156             :          * the subsystem been already initialized.
    2157             :          */
    2158         628 :         if (!g_bdev_mgr.module_init_complete || g_bdev_mgr.init_complete) {
    2159         563 :                 return;
    2160             :         }
    2161             : 
    2162             :         /*
    2163             :          * Check all bdev modules for inits/examinations in progress. If any
    2164             :          * exist, return immediately since we cannot finish bdev subsystem
    2165             :          * initialization until all are completed.
    2166             :          */
    2167          65 :         if (!bdev_module_all_actions_completed()) {
    2168           0 :                 return;
    2169             :         }
    2170             : 
    2171             :         /*
    2172             :          * Modules already finished initialization - now that all
    2173             :          * the bdev modules have finished their asynchronous I/O
    2174             :          * processing, the entire bdev layer can be marked as complete.
    2175             :          */
    2176          65 :         bdev_init_complete(0);
    2177         628 : }
    2178             : 
    2179             : static void
    2180         563 : bdev_module_action_done(struct spdk_bdev_module *module)
    2181             : {
    2182         563 :         spdk_spin_lock(&module->internal.spinlock);
    2183         563 :         assert(module->internal.action_in_progress > 0);
    2184         563 :         module->internal.action_in_progress--;
    2185         563 :         spdk_spin_unlock(&module->internal.spinlock);
    2186         563 :         bdev_module_action_complete();
    2187         563 : }
    2188             : 
    2189             : void
    2190          65 : spdk_bdev_module_init_done(struct spdk_bdev_module *module)
    2191             : {
    2192          65 :         assert(module->async_init);
    2193          65 :         bdev_module_action_done(module);
    2194          65 : }
    2195             : 
    2196             : void
    2197         498 : spdk_bdev_module_examine_done(struct spdk_bdev_module *module)
    2198             : {
    2199         498 :         bdev_module_action_done(module);
    2200         498 : }
    2201             : 
    2202             : /** The last initialized bdev module */
    2203             : static struct spdk_bdev_module *g_resume_bdev_module = NULL;
    2204             : 
    2205             : static void
    2206           0 : bdev_init_failed(void *cb_arg)
    2207             : {
    2208           0 :         struct spdk_bdev_module *module = cb_arg;
    2209             : 
    2210           0 :         spdk_spin_lock(&module->internal.spinlock);
    2211           0 :         assert(module->internal.action_in_progress > 0);
    2212           0 :         module->internal.action_in_progress--;
    2213           0 :         spdk_spin_unlock(&module->internal.spinlock);
    2214           0 :         bdev_init_complete(-1);
    2215           0 : }
    2216             : 
    2217             : static int
    2218          65 : bdev_modules_init(void)
    2219             : {
    2220             :         struct spdk_bdev_module *module;
    2221          65 :         int rc = 0;
    2222             : 
    2223         254 :         TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2224         189 :                 g_resume_bdev_module = module;
    2225         189 :                 if (module->async_init) {
    2226          65 :                         spdk_spin_lock(&module->internal.spinlock);
    2227          65 :                         module->internal.action_in_progress = 1;
    2228          65 :                         spdk_spin_unlock(&module->internal.spinlock);
    2229          65 :                 }
    2230         189 :                 rc = module->module_init();
    2231         189 :                 if (rc != 0) {
    2232             :                         /* Bump action_in_progress to prevent other modules from completion of modules_init
    2233             :                          * Send message to defer application shutdown until resources are cleaned up */
    2234           0 :                         spdk_spin_lock(&module->internal.spinlock);
    2235           0 :                         module->internal.action_in_progress = 1;
    2236           0 :                         spdk_spin_unlock(&module->internal.spinlock);
    2237           0 :                         spdk_thread_send_msg(spdk_get_thread(), bdev_init_failed, module);
    2238           0 :                         return rc;
    2239             :                 }
    2240         189 :         }
    2241             : 
    2242          65 :         g_resume_bdev_module = NULL;
    2243          65 :         return 0;
    2244          65 : }
    2245             : 
    2246             : void
    2247          65 : spdk_bdev_initialize(spdk_bdev_init_cb cb_fn, void *cb_arg)
    2248             : {
    2249          65 :         int rc = 0;
    2250             :         char mempool_name[32];
    2251             : 
    2252          65 :         assert(cb_fn != NULL);
    2253             : 
    2254          65 :         g_init_cb_fn = cb_fn;
    2255          65 :         g_init_cb_arg = cb_arg;
    2256             : 
    2257          65 :         spdk_notify_type_register("bdev_register");
    2258          65 :         spdk_notify_type_register("bdev_unregister");
    2259             : 
    2260          65 :         snprintf(mempool_name, sizeof(mempool_name), "bdev_io_%d", getpid());
    2261             : 
    2262          65 :         rc = spdk_iobuf_register_module("bdev");
    2263          65 :         if (rc != 0) {
    2264           0 :                 SPDK_ERRLOG("could not register bdev iobuf module: %s\n", spdk_strerror(-rc));
    2265           0 :                 bdev_init_complete(-1);
    2266           0 :                 return;
    2267             :         }
    2268             : 
    2269         130 :         g_bdev_mgr.bdev_io_pool = spdk_mempool_create(mempool_name,
    2270          65 :                                   g_bdev_opts.bdev_io_pool_size,
    2271          65 :                                   sizeof(struct spdk_bdev_io) +
    2272          65 :                                   bdev_module_get_max_ctx_size(),
    2273             :                                   0,
    2274             :                                   SPDK_ENV_NUMA_ID_ANY);
    2275             : 
    2276          65 :         if (g_bdev_mgr.bdev_io_pool == NULL) {
    2277           0 :                 SPDK_ERRLOG("could not allocate spdk_bdev_io pool\n");
    2278           0 :                 bdev_init_complete(-1);
    2279           0 :                 return;
    2280             :         }
    2281             : 
    2282          65 :         g_bdev_mgr.zero_buffer = spdk_zmalloc(ZERO_BUFFER_SIZE, ZERO_BUFFER_SIZE,
    2283             :                                               NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
    2284          65 :         if (!g_bdev_mgr.zero_buffer) {
    2285           0 :                 SPDK_ERRLOG("create bdev zero buffer failed\n");
    2286           0 :                 bdev_init_complete(-1);
    2287           0 :                 return;
    2288             :         }
    2289             : 
    2290             : #ifdef SPDK_CONFIG_VTUNE
    2291             :         g_bdev_mgr.domain = __itt_domain_create("spdk_bdev");
    2292             : #endif
    2293             : 
    2294          65 :         spdk_io_device_register(&g_bdev_mgr, bdev_mgmt_channel_create,
    2295             :                                 bdev_mgmt_channel_destroy,
    2296             :                                 sizeof(struct spdk_bdev_mgmt_channel),
    2297             :                                 "bdev_mgr");
    2298             : 
    2299          65 :         rc = bdev_modules_init();
    2300          65 :         g_bdev_mgr.module_init_complete = true;
    2301          65 :         if (rc != 0) {
    2302           0 :                 SPDK_ERRLOG("bdev modules init failed\n");
    2303           0 :                 return;
    2304             :         }
    2305             : 
    2306          65 :         bdev_module_action_complete();
    2307          65 : }
    2308             : 
    2309             : static void
    2310          65 : bdev_mgr_unregister_cb(void *io_device)
    2311             : {
    2312          65 :         spdk_bdev_fini_cb cb_fn = g_fini_cb_fn;
    2313             : 
    2314          65 :         if (g_bdev_mgr.bdev_io_pool) {
    2315          65 :                 if (spdk_mempool_count(g_bdev_mgr.bdev_io_pool) != g_bdev_opts.bdev_io_pool_size) {
    2316           0 :                         SPDK_ERRLOG("bdev IO pool count is %zu but should be %u\n",
    2317             :                                     spdk_mempool_count(g_bdev_mgr.bdev_io_pool),
    2318             :                                     g_bdev_opts.bdev_io_pool_size);
    2319           0 :                 }
    2320             : 
    2321          65 :                 spdk_mempool_free(g_bdev_mgr.bdev_io_pool);
    2322          65 :         }
    2323             : 
    2324          65 :         spdk_free(g_bdev_mgr.zero_buffer);
    2325             : 
    2326          65 :         bdev_examine_allowlist_free();
    2327             : 
    2328          65 :         cb_fn(g_fini_cb_arg);
    2329          65 :         g_fini_cb_fn = NULL;
    2330          65 :         g_fini_cb_arg = NULL;
    2331          65 :         g_bdev_mgr.init_complete = false;
    2332          65 :         g_bdev_mgr.module_init_complete = false;
    2333          65 : }
    2334             : 
    2335             : static void
    2336          65 : bdev_module_fini_iter(void *arg)
    2337             : {
    2338             :         struct spdk_bdev_module *bdev_module;
    2339             : 
    2340             :         /* FIXME: Handling initialization failures is broken now,
    2341             :          * so we won't even try cleaning up after successfully
    2342             :          * initialized modules. if module_init_complete is false,
    2343             :          * just call spdk_bdev_mgr_unregister_cb
    2344             :          */
    2345          65 :         if (!g_bdev_mgr.module_init_complete) {
    2346           0 :                 bdev_mgr_unregister_cb(NULL);
    2347           0 :                 return;
    2348             :         }
    2349             : 
    2350             :         /* Start iterating from the last touched module */
    2351          65 :         if (!g_resume_bdev_module) {
    2352          65 :                 bdev_module = TAILQ_LAST(&g_bdev_mgr.bdev_modules, bdev_module_list);
    2353          65 :         } else {
    2354           0 :                 bdev_module = TAILQ_PREV(g_resume_bdev_module, bdev_module_list,
    2355             :                                          internal.tailq);
    2356             :         }
    2357             : 
    2358         254 :         while (bdev_module) {
    2359         189 :                 if (bdev_module->async_fini) {
    2360             :                         /* Save our place so we can resume later. We must
    2361             :                          * save the variable here, before calling module_fini()
    2362             :                          * below, because in some cases the module may immediately
    2363             :                          * call spdk_bdev_module_fini_done() and re-enter
    2364             :                          * this function to continue iterating. */
    2365           0 :                         g_resume_bdev_module = bdev_module;
    2366           0 :                 }
    2367             : 
    2368         189 :                 if (bdev_module->module_fini) {
    2369         189 :                         bdev_module->module_fini();
    2370         189 :                 }
    2371             : 
    2372         189 :                 if (bdev_module->async_fini) {
    2373           0 :                         return;
    2374             :                 }
    2375             : 
    2376         189 :                 bdev_module = TAILQ_PREV(bdev_module, bdev_module_list,
    2377             :                                          internal.tailq);
    2378             :         }
    2379             : 
    2380          65 :         g_resume_bdev_module = NULL;
    2381          65 :         spdk_io_device_unregister(&g_bdev_mgr, bdev_mgr_unregister_cb);
    2382          65 : }
    2383             : 
    2384             : void
    2385           0 : spdk_bdev_module_fini_done(void)
    2386             : {
    2387           0 :         if (spdk_get_thread() != g_fini_thread) {
    2388           0 :                 spdk_thread_send_msg(g_fini_thread, bdev_module_fini_iter, NULL);
    2389           0 :         } else {
    2390           0 :                 bdev_module_fini_iter(NULL);
    2391             :         }
    2392           0 : }
    2393             : 
    2394             : static void
    2395          65 : bdev_finish_unregister_bdevs_iter(void *cb_arg, int bdeverrno)
    2396             : {
    2397          65 :         struct spdk_bdev *bdev = cb_arg;
    2398             : 
    2399          65 :         if (bdeverrno && bdev) {
    2400           0 :                 SPDK_WARNLOG("Unable to unregister bdev '%s' during spdk_bdev_finish()\n",
    2401             :                              bdev->name);
    2402             : 
    2403             :                 /*
    2404             :                  * Since the call to spdk_bdev_unregister() failed, we have no way to free this
    2405             :                  *  bdev; try to continue by manually removing this bdev from the list and continue
    2406             :                  *  with the next bdev in the list.
    2407             :                  */
    2408           0 :                 TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, internal.link);
    2409           0 :         }
    2410             : 
    2411          65 :         if (TAILQ_EMPTY(&g_bdev_mgr.bdevs)) {
    2412          65 :                 SPDK_DEBUGLOG(bdev, "Done unregistering bdevs\n");
    2413             :                 /*
    2414             :                  * Bdev module finish need to be deferred as we might be in the middle of some context
    2415             :                  * (like bdev part free) that will use this bdev (or private bdev driver ctx data)
    2416             :                  * after returning.
    2417             :                  */
    2418          65 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_module_fini_iter, NULL);
    2419          65 :                 return;
    2420             :         }
    2421             : 
    2422             :         /*
    2423             :          * Unregister last unclaimed bdev in the list, to ensure that bdev subsystem
    2424             :          * shutdown proceeds top-down. The goal is to give virtual bdevs an opportunity
    2425             :          * to detect clean shutdown as opposed to run-time hot removal of the underlying
    2426             :          * base bdevs.
    2427             :          *
    2428             :          * Also, walk the list in the reverse order.
    2429             :          */
    2430           0 :         for (bdev = TAILQ_LAST(&g_bdev_mgr.bdevs, spdk_bdev_list);
    2431           0 :              bdev; bdev = TAILQ_PREV(bdev, spdk_bdev_list, internal.link)) {
    2432           0 :                 spdk_spin_lock(&bdev->internal.spinlock);
    2433           0 :                 if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    2434           0 :                         LOG_ALREADY_CLAIMED_DEBUG("claimed, skipping", bdev);
    2435           0 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    2436           0 :                         continue;
    2437             :                 }
    2438           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    2439             : 
    2440           0 :                 SPDK_DEBUGLOG(bdev, "Unregistering bdev '%s'\n", bdev->name);
    2441           0 :                 spdk_bdev_unregister(bdev, bdev_finish_unregister_bdevs_iter, bdev);
    2442           0 :                 return;
    2443             :         }
    2444             : 
    2445             :         /*
    2446             :          * If any bdev fails to unclaim underlying bdev properly, we may face the
    2447             :          * case of bdev list consisting of claimed bdevs only (if claims are managed
    2448             :          * correctly, this would mean there's a loop in the claims graph which is
    2449             :          * clearly impossible). Warn and unregister last bdev on the list then.
    2450             :          */
    2451           0 :         for (bdev = TAILQ_LAST(&g_bdev_mgr.bdevs, spdk_bdev_list);
    2452           0 :              bdev; bdev = TAILQ_PREV(bdev, spdk_bdev_list, internal.link)) {
    2453           0 :                 SPDK_WARNLOG("Unregistering claimed bdev '%s'!\n", bdev->name);
    2454           0 :                 spdk_bdev_unregister(bdev, bdev_finish_unregister_bdevs_iter, bdev);
    2455           0 :                 return;
    2456             :         }
    2457          65 : }
    2458             : 
    2459             : static void
    2460          65 : bdev_module_fini_start_iter(void *arg)
    2461             : {
    2462             :         struct spdk_bdev_module *bdev_module;
    2463             : 
    2464          65 :         if (!g_resume_bdev_module) {
    2465          65 :                 bdev_module = TAILQ_LAST(&g_bdev_mgr.bdev_modules, bdev_module_list);
    2466          65 :         } else {
    2467           0 :                 bdev_module = TAILQ_PREV(g_resume_bdev_module, bdev_module_list, internal.tailq);
    2468             :         }
    2469             : 
    2470         254 :         while (bdev_module) {
    2471         189 :                 if (bdev_module->async_fini_start) {
    2472             :                         /* Save our place so we can resume later. We must
    2473             :                          * save the variable here, before calling fini_start()
    2474             :                          * below, because in some cases the module may immediately
    2475             :                          * call spdk_bdev_module_fini_start_done() and re-enter
    2476             :                          * this function to continue iterating. */
    2477           0 :                         g_resume_bdev_module = bdev_module;
    2478           0 :                 }
    2479             : 
    2480         189 :                 if (bdev_module->fini_start) {
    2481          23 :                         bdev_module->fini_start();
    2482          23 :                 }
    2483             : 
    2484         189 :                 if (bdev_module->async_fini_start) {
    2485           0 :                         return;
    2486             :                 }
    2487             : 
    2488         189 :                 bdev_module = TAILQ_PREV(bdev_module, bdev_module_list, internal.tailq);
    2489             :         }
    2490             : 
    2491          65 :         g_resume_bdev_module = NULL;
    2492             : 
    2493          65 :         bdev_finish_unregister_bdevs_iter(NULL, 0);
    2494          65 : }
    2495             : 
    2496             : void
    2497           0 : spdk_bdev_module_fini_start_done(void)
    2498             : {
    2499           0 :         if (spdk_get_thread() != g_fini_thread) {
    2500           0 :                 spdk_thread_send_msg(g_fini_thread, bdev_module_fini_start_iter, NULL);
    2501           0 :         } else {
    2502           0 :                 bdev_module_fini_start_iter(NULL);
    2503             :         }
    2504           0 : }
    2505             : 
    2506             : static void
    2507          65 : bdev_finish_wait_for_examine_done(void *cb_arg)
    2508             : {
    2509          65 :         bdev_module_fini_start_iter(NULL);
    2510          65 : }
    2511             : 
    2512             : static void bdev_open_async_fini(void);
    2513             : 
    2514             : void
    2515          65 : spdk_bdev_finish(spdk_bdev_fini_cb cb_fn, void *cb_arg)
    2516             : {
    2517             :         int rc;
    2518             : 
    2519          65 :         assert(cb_fn != NULL);
    2520             : 
    2521          65 :         g_fini_thread = spdk_get_thread();
    2522             : 
    2523          65 :         g_fini_cb_fn = cb_fn;
    2524          65 :         g_fini_cb_arg = cb_arg;
    2525             : 
    2526          65 :         bdev_open_async_fini();
    2527             : 
    2528          65 :         rc = spdk_bdev_wait_for_examine(bdev_finish_wait_for_examine_done, NULL);
    2529          65 :         if (rc != 0) {
    2530           0 :                 SPDK_ERRLOG("wait_for_examine failed: %s\n", spdk_strerror(-rc));
    2531           0 :                 bdev_finish_wait_for_examine_done(NULL);
    2532           0 :         }
    2533          65 : }
    2534             : 
    2535             : struct spdk_bdev_io *
    2536         697 : bdev_channel_get_io(struct spdk_bdev_channel *channel)
    2537             : {
    2538         697 :         struct spdk_bdev_mgmt_channel *ch = channel->shared_resource->mgmt_ch;
    2539             :         struct spdk_bdev_io *bdev_io;
    2540             : 
    2541         697 :         if (ch->per_thread_cache_count > 0) {
    2542         637 :                 bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
    2543         637 :                 STAILQ_REMOVE_HEAD(&ch->per_thread_cache, internal.buf_link);
    2544         637 :                 ch->per_thread_cache_count--;
    2545         697 :         } else if (spdk_unlikely(!TAILQ_EMPTY(&ch->io_wait_queue))) {
    2546             :                 /*
    2547             :                  * Don't try to look for bdev_ios in the global pool if there are
    2548             :                  * waiters on bdev_ios - we don't want this caller to jump the line.
    2549             :                  */
    2550           0 :                 bdev_io = NULL;
    2551           0 :         } else {
    2552          60 :                 bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
    2553             :         }
    2554             : 
    2555         697 :         return bdev_io;
    2556             : }
    2557             : 
    2558             : void
    2559         691 : spdk_bdev_free_io(struct spdk_bdev_io *bdev_io)
    2560             : {
    2561             :         struct spdk_bdev_mgmt_channel *ch;
    2562             : 
    2563         691 :         assert(bdev_io != NULL);
    2564         691 :         assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_PENDING);
    2565             : 
    2566         691 :         ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    2567             : 
    2568         691 :         if (bdev_io->internal.f.has_buf) {
    2569          16 :                 bdev_io_put_buf(bdev_io);
    2570          16 :         }
    2571             : 
    2572         691 :         if (ch->per_thread_cache_count < ch->bdev_io_cache_size) {
    2573         637 :                 ch->per_thread_cache_count++;
    2574         637 :                 STAILQ_INSERT_HEAD(&ch->per_thread_cache, bdev_io, internal.buf_link);
    2575         641 :                 while (ch->per_thread_cache_count > 0 && !TAILQ_EMPTY(&ch->io_wait_queue)) {
    2576             :                         struct spdk_bdev_io_wait_entry *entry;
    2577             : 
    2578           4 :                         entry = TAILQ_FIRST(&ch->io_wait_queue);
    2579           4 :                         TAILQ_REMOVE(&ch->io_wait_queue, entry, link);
    2580           4 :                         entry->cb_fn(entry->cb_arg);
    2581             :                 }
    2582         637 :         } else {
    2583             :                 /* We should never have a full cache with entries on the io wait queue. */
    2584          54 :                 assert(TAILQ_EMPTY(&ch->io_wait_queue));
    2585          54 :                 spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
    2586             :         }
    2587         691 : }
    2588             : 
    2589             : static bool
    2590          72 : bdev_qos_is_iops_rate_limit(enum spdk_bdev_qos_rate_limit_type limit)
    2591             : {
    2592          72 :         assert(limit != SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES);
    2593             : 
    2594          72 :         switch (limit) {
    2595             :         case SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT:
    2596          18 :                 return true;
    2597             :         case SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT:
    2598             :         case SPDK_BDEV_QOS_R_BPS_RATE_LIMIT:
    2599             :         case SPDK_BDEV_QOS_W_BPS_RATE_LIMIT:
    2600          54 :                 return false;
    2601           0 :         case SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES:
    2602             :         default:
    2603           0 :                 return false;
    2604             :         }
    2605          72 : }
    2606             : 
    2607             : static bool
    2608          25 : bdev_qos_io_to_limit(struct spdk_bdev_io *bdev_io)
    2609             : {
    2610          25 :         switch (bdev_io->type) {
    2611             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2612             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2613             :         case SPDK_BDEV_IO_TYPE_READ:
    2614             :         case SPDK_BDEV_IO_TYPE_WRITE:
    2615          23 :                 return true;
    2616             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2617           0 :                 if (bdev_io->u.bdev.zcopy.start) {
    2618           0 :                         return true;
    2619             :                 } else {
    2620           0 :                         return false;
    2621             :                 }
    2622             :         default:
    2623           2 :                 return false;
    2624             :         }
    2625          25 : }
    2626             : 
    2627             : static bool
    2628          33 : bdev_is_read_io(struct spdk_bdev_io *bdev_io)
    2629             : {
    2630          33 :         switch (bdev_io->type) {
    2631             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2632             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2633             :                 /* Bit 1 (0x2) set for read operation */
    2634           0 :                 if (bdev_io->u.nvme_passthru.cmd.opc & SPDK_NVME_OPC_READ) {
    2635           0 :                         return true;
    2636             :                 } else {
    2637           0 :                         return false;
    2638             :                 }
    2639             :         case SPDK_BDEV_IO_TYPE_READ:
    2640          30 :                 return true;
    2641             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2642             :                 /* Populate to read from disk */
    2643           0 :                 if (bdev_io->u.bdev.zcopy.populate) {
    2644           0 :                         return true;
    2645             :                 } else {
    2646           0 :                         return false;
    2647             :                 }
    2648             :         default:
    2649           3 :                 return false;
    2650             :         }
    2651          33 : }
    2652             : 
    2653             : static uint64_t
    2654          43 : bdev_get_io_size_in_byte(struct spdk_bdev_io *bdev_io)
    2655             : {
    2656          43 :         uint32_t blocklen = bdev_io_get_block_size(bdev_io);
    2657             : 
    2658          43 :         switch (bdev_io->type) {
    2659             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2660             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2661           0 :                 return bdev_io->u.nvme_passthru.nbytes;
    2662             :         case SPDK_BDEV_IO_TYPE_READ:
    2663             :         case SPDK_BDEV_IO_TYPE_WRITE:
    2664          43 :                 return bdev_io->u.bdev.num_blocks * blocklen;
    2665             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2666             :                 /* Track the data in the start phase only */
    2667           0 :                 if (bdev_io->u.bdev.zcopy.start) {
    2668           0 :                         return bdev_io->u.bdev.num_blocks * blocklen;
    2669             :                 } else {
    2670           0 :                         return 0;
    2671             :                 }
    2672             :         default:
    2673           0 :                 return 0;
    2674             :         }
    2675          43 : }
    2676             : 
    2677             : static inline bool
    2678          64 : bdev_qos_rw_queue_io(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io, uint64_t delta)
    2679             : {
    2680             :         int64_t remaining_this_timeslice;
    2681             : 
    2682          64 :         if (!limit->max_per_timeslice) {
    2683             :                 /* The QoS is disabled */
    2684           0 :                 return false;
    2685             :         }
    2686             : 
    2687          64 :         remaining_this_timeslice = __atomic_sub_fetch(&limit->remaining_this_timeslice, delta,
    2688             :                                    __ATOMIC_RELAXED);
    2689          64 :         if (remaining_this_timeslice + (int64_t)delta > 0) {
    2690             :                 /* There was still a quota for this delta -> the IO shouldn't be queued
    2691             :                  *
    2692             :                  * We allow a slight quota overrun here so an IO bigger than the per-timeslice
    2693             :                  * quota can be allowed once a while. Such overrun then taken into account in
    2694             :                  * the QoS poller, where the next timeslice quota is calculated.
    2695             :                  */
    2696          59 :                 return false;
    2697             :         }
    2698             : 
    2699             :         /* There was no quota for this delta -> the IO should be queued
    2700             :          * The remaining_this_timeslice must be rewinded so it reflects the real
    2701             :          * amount of IOs or bytes allowed.
    2702             :          */
    2703           5 :         __atomic_add_fetch(
    2704           5 :                 &limit->remaining_this_timeslice, delta, __ATOMIC_RELAXED);
    2705           5 :         return true;
    2706          64 : }
    2707             : 
    2708             : static inline void
    2709           5 : bdev_qos_rw_rewind_io(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io, uint64_t delta)
    2710             : {
    2711           5 :         __atomic_add_fetch(&limit->remaining_this_timeslice, delta, __ATOMIC_RELAXED);
    2712           5 : }
    2713             : 
    2714             : static bool
    2715          23 : bdev_qos_rw_iops_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2716             : {
    2717          23 :         return bdev_qos_rw_queue_io(limit, io, 1);
    2718             : }
    2719             : 
    2720             : static void
    2721           3 : bdev_qos_rw_iops_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2722             : {
    2723           3 :         bdev_qos_rw_rewind_io(limit, io, 1);
    2724           3 : }
    2725             : 
    2726             : static bool
    2727          41 : bdev_qos_rw_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2728             : {
    2729          41 :         return bdev_qos_rw_queue_io(limit, io, bdev_get_io_size_in_byte(io));
    2730             : }
    2731             : 
    2732             : static void
    2733           2 : bdev_qos_rw_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2734             : {
    2735           2 :         bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2736           2 : }
    2737             : 
    2738             : static bool
    2739          19 : bdev_qos_r_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2740             : {
    2741          19 :         if (bdev_is_read_io(io) == false) {
    2742           1 :                 return false;
    2743             :         }
    2744             : 
    2745          18 :         return bdev_qos_rw_bps_queue(limit, io);
    2746          19 : }
    2747             : 
    2748             : static void
    2749           0 : bdev_qos_r_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2750             : {
    2751           0 :         if (bdev_is_read_io(io) != false) {
    2752           0 :                 bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2753           0 :         }
    2754           0 : }
    2755             : 
    2756             : static bool
    2757          14 : bdev_qos_w_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2758             : {
    2759          14 :         if (bdev_is_read_io(io) == true) {
    2760          12 :                 return false;
    2761             :         }
    2762             : 
    2763           2 :         return bdev_qos_rw_bps_queue(limit, io);
    2764          14 : }
    2765             : 
    2766             : static void
    2767           0 : bdev_qos_w_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2768             : {
    2769           0 :         if (bdev_is_read_io(io) != true) {
    2770           0 :                 bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2771           0 :         }
    2772           0 : }
    2773             : 
    2774             : static void
    2775          10 : bdev_qos_set_ops(struct spdk_bdev_qos *qos)
    2776             : {
    2777             :         int i;
    2778             : 
    2779          50 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2780          40 :                 if (qos->rate_limits[i].limit == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    2781          15 :                         qos->rate_limits[i].queue_io = NULL;
    2782          15 :                         continue;
    2783             :                 }
    2784             : 
    2785          25 :                 switch (i) {
    2786             :                 case SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT:
    2787           9 :                         qos->rate_limits[i].queue_io = bdev_qos_rw_iops_queue;
    2788           9 :                         qos->rate_limits[i].rewind_quota = bdev_qos_rw_iops_rewind_quota;
    2789           9 :                         break;
    2790             :                 case SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT:
    2791           7 :                         qos->rate_limits[i].queue_io = bdev_qos_rw_bps_queue;
    2792           7 :                         qos->rate_limits[i].rewind_quota = bdev_qos_rw_bps_rewind_quota;
    2793           7 :                         break;
    2794             :                 case SPDK_BDEV_QOS_R_BPS_RATE_LIMIT:
    2795           5 :                         qos->rate_limits[i].queue_io = bdev_qos_r_bps_queue;
    2796           5 :                         qos->rate_limits[i].rewind_quota = bdev_qos_r_bps_rewind_quota;
    2797           5 :                         break;
    2798             :                 case SPDK_BDEV_QOS_W_BPS_RATE_LIMIT:
    2799           4 :                         qos->rate_limits[i].queue_io = bdev_qos_w_bps_queue;
    2800           4 :                         qos->rate_limits[i].rewind_quota = bdev_qos_w_bps_rewind_quota;
    2801           4 :                         break;
    2802             :                 default:
    2803           0 :                         break;
    2804             :                 }
    2805          25 :         }
    2806          10 : }
    2807             : 
    2808             : static void
    2809           6 : _bdev_io_complete_in_submit(struct spdk_bdev_channel *bdev_ch,
    2810             :                             struct spdk_bdev_io *bdev_io,
    2811             :                             enum spdk_bdev_io_status status)
    2812             : {
    2813           6 :         bdev_io->internal.f.in_submit_request = true;
    2814           6 :         bdev_io_increment_outstanding(bdev_ch, bdev_ch->shared_resource);
    2815           6 :         spdk_bdev_io_complete(bdev_io, status);
    2816           6 :         bdev_io->internal.f.in_submit_request = false;
    2817           6 : }
    2818             : 
    2819             : static inline void
    2820         574 : bdev_io_do_submit(struct spdk_bdev_channel *bdev_ch, struct spdk_bdev_io *bdev_io)
    2821             : {
    2822         574 :         struct spdk_bdev *bdev = bdev_io->bdev;
    2823         574 :         struct spdk_io_channel *ch = bdev_ch->channel;
    2824         574 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    2825             : 
    2826         574 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT)) {
    2827          16 :                 struct spdk_bdev_mgmt_channel *mgmt_channel = shared_resource->mgmt_ch;
    2828          16 :                 struct spdk_bdev_io *bio_to_abort = bdev_io->u.abort.bio_to_abort;
    2829             : 
    2830          16 :                 if (bdev_abort_queued_io(&shared_resource->nomem_io, bio_to_abort) ||
    2831          16 :                     bdev_abort_buf_io(mgmt_channel, bio_to_abort)) {
    2832           0 :                         _bdev_io_complete_in_submit(bdev_ch, bdev_io,
    2833             :                                                     SPDK_BDEV_IO_STATUS_SUCCESS);
    2834           0 :                         return;
    2835             :                 }
    2836          16 :         }
    2837             : 
    2838         574 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE &&
    2839             :                           bdev_io->bdev->split_on_write_unit &&
    2840             :                           bdev_io->u.bdev.num_blocks < bdev_io->bdev->write_unit_size)) {
    2841           4 :                 SPDK_ERRLOG("IO num_blocks %lu does not match the write_unit_size %u\n",
    2842             :                             bdev_io->u.bdev.num_blocks, bdev_io->bdev->write_unit_size);
    2843           4 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    2844           4 :                 return;
    2845             :         }
    2846             : 
    2847         570 :         if (spdk_likely(TAILQ_EMPTY(&shared_resource->nomem_io))) {
    2848         527 :                 bdev_io_increment_outstanding(bdev_ch, shared_resource);
    2849         527 :                 bdev_io->internal.f.in_submit_request = true;
    2850         527 :                 bdev_submit_request(bdev, ch, bdev_io);
    2851         527 :                 bdev_io->internal.f.in_submit_request = false;
    2852         527 :         } else {
    2853          43 :                 bdev_queue_nomem_io_tail(shared_resource, bdev_io, BDEV_IO_RETRY_STATE_SUBMIT);
    2854          43 :                 if (shared_resource->nomem_threshold == 0 && shared_resource->io_outstanding == 0) {
    2855             :                         /* Special case when we have nomem IOs and no outstanding IOs which completions
    2856             :                          * could trigger retry of queued IOs */
    2857           0 :                         bdev_shared_ch_retry_io(shared_resource);
    2858           0 :                 }
    2859             :         }
    2860         574 : }
    2861             : 
    2862             : static bool
    2863          25 : bdev_qos_queue_io(struct spdk_bdev_qos *qos, struct spdk_bdev_io *bdev_io)
    2864             : {
    2865             :         int i;
    2866             : 
    2867          25 :         if (bdev_qos_io_to_limit(bdev_io) == true) {
    2868         100 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2869          82 :                         if (!qos->rate_limits[i].queue_io) {
    2870           5 :                                 continue;
    2871             :                         }
    2872             : 
    2873         231 :                         if (qos->rate_limits[i].queue_io(&qos->rate_limits[i],
    2874         154 :                                                          bdev_io) == true) {
    2875          10 :                                 for (i -= 1; i >= 0 ; i--) {
    2876           5 :                                         if (!qos->rate_limits[i].queue_io) {
    2877           0 :                                                 continue;
    2878             :                                         }
    2879             : 
    2880           5 :                                         qos->rate_limits[i].rewind_quota(&qos->rate_limits[i], bdev_io);
    2881           5 :                                 }
    2882           5 :                                 return true;
    2883             :                         }
    2884          72 :                 }
    2885          18 :         }
    2886             : 
    2887          20 :         return false;
    2888          25 : }
    2889             : 
    2890             : static int
    2891          27 : bdev_qos_io_submit(struct spdk_bdev_channel *ch, struct spdk_bdev_qos *qos)
    2892             : {
    2893          27 :         struct spdk_bdev_io             *bdev_io = NULL, *tmp = NULL;
    2894          27 :         int                             submitted_ios = 0;
    2895             : 
    2896          52 :         TAILQ_FOREACH_SAFE(bdev_io, &ch->qos_queued_io, internal.link, tmp) {
    2897          25 :                 if (!bdev_qos_queue_io(qos, bdev_io)) {
    2898          20 :                         TAILQ_REMOVE(&ch->qos_queued_io, bdev_io, internal.link);
    2899          20 :                         bdev_io_do_submit(ch, bdev_io);
    2900             : 
    2901          20 :                         submitted_ios++;
    2902          20 :                 }
    2903          25 :         }
    2904             : 
    2905          27 :         return submitted_ios;
    2906             : }
    2907             : 
    2908             : static void
    2909           2 : bdev_queue_io_wait_with_cb(struct spdk_bdev_io *bdev_io, spdk_bdev_io_wait_cb cb_fn)
    2910             : {
    2911             :         int rc;
    2912             : 
    2913           2 :         bdev_io->internal.waitq_entry.bdev = bdev_io->bdev;
    2914           2 :         bdev_io->internal.waitq_entry.cb_fn = cb_fn;
    2915           2 :         bdev_io->internal.waitq_entry.cb_arg = bdev_io;
    2916           4 :         rc = spdk_bdev_queue_io_wait(bdev_io->bdev, spdk_io_channel_from_ctx(bdev_io->internal.ch),
    2917           2 :                                      &bdev_io->internal.waitq_entry);
    2918           2 :         if (rc != 0) {
    2919           0 :                 SPDK_ERRLOG("Queue IO failed, rc=%d\n", rc);
    2920           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    2921           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    2922           0 :         }
    2923           2 : }
    2924             : 
    2925             : static bool
    2926         621 : bdev_rw_should_split(struct spdk_bdev_io *bdev_io)
    2927             : {
    2928             :         uint32_t io_boundary;
    2929         621 :         struct spdk_bdev *bdev = bdev_io->bdev;
    2930         621 :         uint32_t max_segment_size = bdev->max_segment_size;
    2931         621 :         uint32_t max_size = bdev->max_rw_size;
    2932         621 :         int max_segs = bdev->max_num_segments;
    2933             : 
    2934         621 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE && bdev->split_on_write_unit) {
    2935          24 :                 io_boundary = bdev->write_unit_size;
    2936         621 :         } else if (bdev->split_on_optimal_io_boundary) {
    2937         168 :                 io_boundary = bdev->optimal_io_boundary;
    2938         168 :         } else {
    2939         429 :                 io_boundary = 0;
    2940             :         }
    2941             : 
    2942         621 :         if (spdk_likely(!io_boundary && !max_segs && !max_segment_size && !max_size)) {
    2943         243 :                 return false;
    2944             :         }
    2945             : 
    2946         378 :         if (io_boundary) {
    2947             :                 uint64_t start_stripe, end_stripe;
    2948             : 
    2949         192 :                 start_stripe = bdev_io->u.bdev.offset_blocks;
    2950         192 :                 end_stripe = start_stripe + bdev_io->u.bdev.num_blocks - 1;
    2951             :                 /* Avoid expensive div operations if possible.  These spdk_u32 functions are very cheap. */
    2952         192 :                 if (spdk_likely(spdk_u32_is_pow2(io_boundary))) {
    2953         192 :                         start_stripe >>= spdk_u32log2(io_boundary);
    2954         192 :                         end_stripe >>= spdk_u32log2(io_boundary);
    2955         192 :                 } else {
    2956           0 :                         start_stripe /= io_boundary;
    2957           0 :                         end_stripe /= io_boundary;
    2958             :                 }
    2959             : 
    2960         192 :                 if (start_stripe != end_stripe) {
    2961          75 :                         return true;
    2962             :                 }
    2963         117 :         }
    2964             : 
    2965         303 :         if (max_segs) {
    2966         150 :                 if (bdev_io->u.bdev.iovcnt > max_segs) {
    2967          15 :                         return true;
    2968             :                 }
    2969         135 :         }
    2970             : 
    2971         288 :         if (max_segment_size) {
    2972         470 :                 for (int i = 0; i < bdev_io->u.bdev.iovcnt; i++) {
    2973         346 :                         if (bdev_io->u.bdev.iovs[i].iov_len > max_segment_size) {
    2974          12 :                                 return true;
    2975             :                         }
    2976         334 :                 }
    2977         124 :         }
    2978             : 
    2979         276 :         if (max_size) {
    2980          52 :                 if (bdev_io->u.bdev.num_blocks > max_size) {
    2981           7 :                         return true;
    2982             :                 }
    2983          45 :         }
    2984             : 
    2985         269 :         return false;
    2986         621 : }
    2987             : 
    2988             : static bool
    2989          24 : bdev_unmap_should_split(struct spdk_bdev_io *bdev_io)
    2990             : {
    2991             :         uint32_t num_unmap_segments;
    2992             : 
    2993          24 :         if (!bdev_io->bdev->max_unmap || !bdev_io->bdev->max_unmap_segments) {
    2994           3 :                 return false;
    2995             :         }
    2996          21 :         num_unmap_segments = spdk_divide_round_up(bdev_io->u.bdev.num_blocks, bdev_io->bdev->max_unmap);
    2997          21 :         if (num_unmap_segments > bdev_io->bdev->max_unmap_segments) {
    2998           4 :                 return true;
    2999             :         }
    3000             : 
    3001          17 :         return false;
    3002          24 : }
    3003             : 
    3004             : static bool
    3005          37 : bdev_write_zeroes_should_split(struct spdk_bdev_io *bdev_io)
    3006             : {
    3007          37 :         if (!bdev_io->bdev->max_write_zeroes) {
    3008           4 :                 return false;
    3009             :         }
    3010             : 
    3011          33 :         if (bdev_io->u.bdev.num_blocks > bdev_io->bdev->max_write_zeroes) {
    3012          10 :                 return true;
    3013             :         }
    3014             : 
    3015          23 :         return false;
    3016          37 : }
    3017             : 
    3018             : static bool
    3019          30 : bdev_copy_should_split(struct spdk_bdev_io *bdev_io)
    3020             : {
    3021          30 :         if (bdev_io->bdev->max_copy != 0 &&
    3022          25 :             bdev_io->u.bdev.num_blocks > bdev_io->bdev->max_copy) {
    3023           6 :                 return true;
    3024             :         }
    3025             : 
    3026          24 :         return false;
    3027          30 : }
    3028             : 
    3029             : static bool
    3030         792 : bdev_io_should_split(struct spdk_bdev_io *bdev_io)
    3031             : {
    3032         792 :         switch (bdev_io->type) {
    3033             :         case SPDK_BDEV_IO_TYPE_READ:
    3034             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3035         621 :                 return bdev_rw_should_split(bdev_io);
    3036             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3037          24 :                 return bdev_unmap_should_split(bdev_io);
    3038             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3039          37 :                 return bdev_write_zeroes_should_split(bdev_io);
    3040             :         case SPDK_BDEV_IO_TYPE_COPY:
    3041          30 :                 return bdev_copy_should_split(bdev_io);
    3042             :         default:
    3043          80 :                 return false;
    3044             :         }
    3045         792 : }
    3046             : 
    3047             : static uint32_t
    3048         249 : _to_next_boundary(uint64_t offset, uint32_t boundary)
    3049             : {
    3050         249 :         return (boundary - (offset % boundary));
    3051             : }
    3052             : 
    3053             : static void bdev_io_split_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
    3054             : 
    3055             : static void _bdev_rw_split(void *_bdev_io);
    3056             : 
    3057             : static void bdev_unmap_split(struct spdk_bdev_io *bdev_io);
    3058             : 
    3059             : static void
    3060           0 : _bdev_unmap_split(void *_bdev_io)
    3061             : {
    3062           0 :         return bdev_unmap_split((struct spdk_bdev_io *)_bdev_io);
    3063             : }
    3064             : 
    3065             : static void bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io);
    3066             : 
    3067             : static void
    3068           0 : _bdev_write_zeroes_split(void *_bdev_io)
    3069             : {
    3070           0 :         return bdev_write_zeroes_split((struct spdk_bdev_io *)_bdev_io);
    3071             : }
    3072             : 
    3073             : static void bdev_copy_split(struct spdk_bdev_io *bdev_io);
    3074             : 
    3075             : static void
    3076           0 : _bdev_copy_split(void *_bdev_io)
    3077             : {
    3078           0 :         return bdev_copy_split((struct spdk_bdev_io *)_bdev_io);
    3079             : }
    3080             : 
    3081             : static int
    3082         305 : bdev_io_split_submit(struct spdk_bdev_io *bdev_io, struct iovec *iov, int iovcnt, void *md_buf,
    3083             :                      uint64_t num_blocks, uint64_t *offset, uint64_t *remaining)
    3084             : {
    3085             :         int rc;
    3086             :         uint64_t current_offset, current_remaining, current_src_offset;
    3087             :         spdk_bdev_io_wait_cb io_wait_fn;
    3088             : 
    3089         305 :         current_offset = *offset;
    3090         305 :         current_remaining = *remaining;
    3091             : 
    3092         305 :         assert(bdev_io->internal.f.split);
    3093             : 
    3094         305 :         bdev_io->internal.split.outstanding++;
    3095             : 
    3096         305 :         io_wait_fn = _bdev_rw_split;
    3097         305 :         switch (bdev_io->type) {
    3098             :         case SPDK_BDEV_IO_TYPE_READ:
    3099         196 :                 assert(bdev_io->u.bdev.accel_sequence == NULL);
    3100         392 :                 rc = bdev_readv_blocks_with_md(bdev_io->internal.desc,
    3101         196 :                                                spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3102         196 :                                                iov, iovcnt, md_buf, current_offset,
    3103         196 :                                                num_blocks,
    3104         196 :                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    3105         196 :                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    3106             :                                                NULL,
    3107         196 :                                                bdev_io->u.bdev.dif_check_flags,
    3108         196 :                                                bdev_io_split_done, bdev_io);
    3109         196 :                 break;
    3110             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3111          50 :                 assert(bdev_io->u.bdev.accel_sequence == NULL);
    3112         100 :                 rc = bdev_writev_blocks_with_md(bdev_io->internal.desc,
    3113          50 :                                                 spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3114          50 :                                                 iov, iovcnt, md_buf, current_offset,
    3115          50 :                                                 num_blocks,
    3116          50 :                                                 bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    3117          50 :                                                 bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    3118             :                                                 NULL,
    3119          50 :                                                 bdev_io->u.bdev.dif_check_flags,
    3120          50 :                                                 bdev_io->u.bdev.nvme_cdw12.raw,
    3121          50 :                                                 bdev_io->u.bdev.nvme_cdw13.raw,
    3122          50 :                                                 bdev_io_split_done, bdev_io);
    3123          50 :                 break;
    3124             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3125          17 :                 io_wait_fn = _bdev_unmap_split;
    3126          34 :                 rc = spdk_bdev_unmap_blocks(bdev_io->internal.desc,
    3127          17 :                                             spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3128          17 :                                             current_offset, num_blocks,
    3129          17 :                                             bdev_io_split_done, bdev_io);
    3130          17 :                 break;
    3131             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3132          23 :                 io_wait_fn = _bdev_write_zeroes_split;
    3133          46 :                 rc = spdk_bdev_write_zeroes_blocks(bdev_io->internal.desc,
    3134          23 :                                                    spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3135          23 :                                                    current_offset, num_blocks,
    3136          23 :                                                    bdev_io_split_done, bdev_io);
    3137          23 :                 break;
    3138             :         case SPDK_BDEV_IO_TYPE_COPY:
    3139          19 :                 io_wait_fn = _bdev_copy_split;
    3140          38 :                 current_src_offset = bdev_io->u.bdev.copy.src_offset_blocks +
    3141          19 :                                      (current_offset - bdev_io->u.bdev.offset_blocks);
    3142          38 :                 rc = spdk_bdev_copy_blocks(bdev_io->internal.desc,
    3143          19 :                                            spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3144          19 :                                            current_offset, current_src_offset, num_blocks,
    3145          19 :                                            bdev_io_split_done, bdev_io);
    3146          19 :                 break;
    3147             :         default:
    3148           0 :                 assert(false);
    3149             :                 rc = -EINVAL;
    3150             :                 break;
    3151             :         }
    3152             : 
    3153         305 :         if (rc == 0) {
    3154         301 :                 current_offset += num_blocks;
    3155         301 :                 current_remaining -= num_blocks;
    3156         301 :                 bdev_io->internal.split.current_offset_blocks = current_offset;
    3157         301 :                 bdev_io->internal.split.remaining_num_blocks = current_remaining;
    3158         301 :                 *offset = current_offset;
    3159         301 :                 *remaining = current_remaining;
    3160         301 :         } else {
    3161           4 :                 bdev_io->internal.split.outstanding--;
    3162           4 :                 if (rc == -ENOMEM) {
    3163           4 :                         if (bdev_io->internal.split.outstanding == 0) {
    3164             :                                 /* No I/O is outstanding. Hence we should wait here. */
    3165           1 :                                 bdev_queue_io_wait_with_cb(bdev_io, io_wait_fn);
    3166           1 :                         }
    3167           4 :                 } else {
    3168           0 :                         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3169           0 :                         if (bdev_io->internal.split.outstanding == 0) {
    3170           0 :                                 bdev_ch_remove_from_io_submitted(bdev_io);
    3171           0 :                                 spdk_trace_record(TRACE_BDEV_IO_DONE, bdev_io->internal.ch->trace_id,
    3172             :                                                   0, (uintptr_t)bdev_io, bdev_io->internal.caller_ctx,
    3173             :                                                   bdev_io->internal.ch->queue_depth);
    3174           0 :                                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3175           0 :                         }
    3176             :                 }
    3177             :         }
    3178             : 
    3179         305 :         return rc;
    3180             : }
    3181             : 
    3182             : static void
    3183          67 : _bdev_rw_split(void *_bdev_io)
    3184             : {
    3185             :         struct iovec *parent_iov, *iov;
    3186          67 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    3187          67 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3188             :         uint64_t parent_offset, current_offset, remaining;
    3189             :         uint32_t parent_iov_offset, parent_iovcnt, parent_iovpos, child_iovcnt;
    3190             :         uint32_t to_next_boundary, to_next_boundary_bytes, to_last_block_bytes;
    3191             :         uint32_t iovcnt, iov_len, child_iovsize;
    3192             :         uint32_t blocklen;
    3193             :         uint32_t io_boundary;
    3194          67 :         uint32_t max_segment_size = bdev->max_segment_size;
    3195          67 :         uint32_t max_child_iovcnt = bdev->max_num_segments;
    3196          67 :         uint32_t max_size = bdev->max_rw_size;
    3197          67 :         void *md_buf = NULL;
    3198             :         int rc;
    3199             : 
    3200          67 :         blocklen = bdev_io_get_block_size(bdev_io);
    3201             : 
    3202          67 :         max_size = max_size ? max_size : UINT32_MAX;
    3203          67 :         max_segment_size = max_segment_size ? max_segment_size : UINT32_MAX;
    3204          67 :         max_child_iovcnt = max_child_iovcnt ? spdk_min(max_child_iovcnt, SPDK_BDEV_IO_NUM_CHILD_IOV) :
    3205             :                            SPDK_BDEV_IO_NUM_CHILD_IOV;
    3206             : 
    3207          67 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE && bdev->split_on_write_unit) {
    3208           5 :                 io_boundary = bdev->write_unit_size;
    3209          67 :         } else if (bdev->split_on_optimal_io_boundary) {
    3210          40 :                 io_boundary = bdev->optimal_io_boundary;
    3211          40 :         } else {
    3212          22 :                 io_boundary = UINT32_MAX;
    3213             :         }
    3214             : 
    3215          67 :         assert(bdev_io->internal.f.split);
    3216             : 
    3217          67 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3218          67 :         current_offset = bdev_io->internal.split.current_offset_blocks;
    3219          67 :         parent_offset = bdev_io->u.bdev.offset_blocks;
    3220          67 :         parent_iov_offset = (current_offset - parent_offset) * blocklen;
    3221          67 :         parent_iovcnt = bdev_io->u.bdev.iovcnt;
    3222             : 
    3223         420 :         for (parent_iovpos = 0; parent_iovpos < parent_iovcnt; parent_iovpos++) {
    3224         420 :                 parent_iov = &bdev_io->u.bdev.iovs[parent_iovpos];
    3225         420 :                 if (parent_iov_offset < parent_iov->iov_len) {
    3226          67 :                         break;
    3227             :                 }
    3228         353 :                 parent_iov_offset -= parent_iov->iov_len;
    3229         353 :         }
    3230             : 
    3231          67 :         child_iovcnt = 0;
    3232         573 :         while (remaining > 0 && parent_iovpos < parent_iovcnt &&
    3233         264 :                child_iovcnt < SPDK_BDEV_IO_NUM_CHILD_IOV) {
    3234         249 :                 to_next_boundary = _to_next_boundary(current_offset, io_boundary);
    3235         249 :                 to_next_boundary = spdk_min(remaining, to_next_boundary);
    3236         249 :                 to_next_boundary = spdk_min(max_size, to_next_boundary);
    3237         249 :                 to_next_boundary_bytes = to_next_boundary * blocklen;
    3238             : 
    3239         249 :                 iov = &bdev_io->child_iov[child_iovcnt];
    3240         249 :                 iovcnt = 0;
    3241             : 
    3242         249 :                 if (bdev_io->u.bdev.md_buf) {
    3243          48 :                         md_buf = (char *)bdev_io->u.bdev.md_buf +
    3244          24 :                                  (current_offset - parent_offset) * spdk_bdev_get_md_size(bdev);
    3245          24 :                 }
    3246             : 
    3247         249 :                 child_iovsize = spdk_min(SPDK_BDEV_IO_NUM_CHILD_IOV - child_iovcnt, max_child_iovcnt);
    3248        1810 :                 while (to_next_boundary_bytes > 0 && parent_iovpos < parent_iovcnt &&
    3249         836 :                        iovcnt < child_iovsize) {
    3250         725 :                         parent_iov = &bdev_io->u.bdev.iovs[parent_iovpos];
    3251         725 :                         iov_len = parent_iov->iov_len - parent_iov_offset;
    3252             : 
    3253         725 :                         iov_len = spdk_min(iov_len, max_segment_size);
    3254         725 :                         iov_len = spdk_min(iov_len, to_next_boundary_bytes);
    3255         725 :                         to_next_boundary_bytes -= iov_len;
    3256             : 
    3257         725 :                         bdev_io->child_iov[child_iovcnt].iov_base = parent_iov->iov_base + parent_iov_offset;
    3258         725 :                         bdev_io->child_iov[child_iovcnt].iov_len = iov_len;
    3259             : 
    3260         725 :                         if (iov_len < parent_iov->iov_len - parent_iov_offset) {
    3261         183 :                                 parent_iov_offset += iov_len;
    3262         183 :                         } else {
    3263         542 :                                 parent_iovpos++;
    3264         542 :                                 parent_iov_offset = 0;
    3265             :                         }
    3266         725 :                         child_iovcnt++;
    3267         725 :                         iovcnt++;
    3268             :                 }
    3269             : 
    3270         249 :                 if (to_next_boundary_bytes > 0) {
    3271             :                         /* We had to stop this child I/O early because we ran out of
    3272             :                          * child_iov space or were limited by max_num_segments.
    3273             :                          * Ensure the iovs to be aligned with block size and
    3274             :                          * then adjust to_next_boundary before starting the
    3275             :                          * child I/O.
    3276             :                          */
    3277         111 :                         assert(child_iovcnt == SPDK_BDEV_IO_NUM_CHILD_IOV ||
    3278             :                                iovcnt == child_iovsize);
    3279         111 :                         to_last_block_bytes = to_next_boundary_bytes % blocklen;
    3280         111 :                         if (to_last_block_bytes != 0) {
    3281          24 :                                 uint32_t child_iovpos = child_iovcnt - 1;
    3282             :                                 /* don't decrease child_iovcnt when it equals to SPDK_BDEV_IO_NUM_CHILD_IOV
    3283             :                                  * so the loop will naturally end
    3284             :                                  */
    3285             : 
    3286          24 :                                 to_last_block_bytes = blocklen - to_last_block_bytes;
    3287          24 :                                 to_next_boundary_bytes += to_last_block_bytes;
    3288          53 :                                 while (to_last_block_bytes > 0 && iovcnt > 0) {
    3289          32 :                                         iov_len = spdk_min(to_last_block_bytes,
    3290             :                                                            bdev_io->child_iov[child_iovpos].iov_len);
    3291          32 :                                         bdev_io->child_iov[child_iovpos].iov_len -= iov_len;
    3292          32 :                                         if (bdev_io->child_iov[child_iovpos].iov_len == 0) {
    3293          15 :                                                 child_iovpos--;
    3294          15 :                                                 if (--iovcnt == 0) {
    3295             :                                                         /* If the child IO is less than a block size just return.
    3296             :                                                          * If the first child IO of any split round is less than
    3297             :                                                          * a block size, an error exit.
    3298             :                                                          */
    3299           3 :                                                         if (bdev_io->internal.split.outstanding == 0) {
    3300           1 :                                                                 SPDK_ERRLOG("The first child io was less than a block size\n");
    3301           1 :                                                                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3302           1 :                                                                 bdev_ch_remove_from_io_submitted(bdev_io);
    3303           1 :                                                                 spdk_trace_record(TRACE_BDEV_IO_DONE, bdev_io->internal.ch->trace_id,
    3304             :                                                                                   0, (uintptr_t)bdev_io, bdev_io->internal.caller_ctx,
    3305             :                                                                                   bdev_io->internal.ch->queue_depth);
    3306           1 :                                                                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3307           1 :                                                         }
    3308             : 
    3309           3 :                                                         return;
    3310             :                                                 }
    3311          12 :                                         }
    3312             : 
    3313          29 :                                         to_last_block_bytes -= iov_len;
    3314             : 
    3315          29 :                                         if (parent_iov_offset == 0) {
    3316          14 :                                                 parent_iovpos--;
    3317          14 :                                                 parent_iov_offset = bdev_io->u.bdev.iovs[parent_iovpos].iov_len;
    3318          14 :                                         }
    3319          29 :                                         parent_iov_offset -= iov_len;
    3320             :                                 }
    3321             : 
    3322          21 :                                 assert(to_last_block_bytes == 0);
    3323          21 :                         }
    3324         108 :                         to_next_boundary -= to_next_boundary_bytes / blocklen;
    3325         108 :                 }
    3326             : 
    3327         246 :                 rc = bdev_io_split_submit(bdev_io, iov, iovcnt, md_buf, to_next_boundary,
    3328             :                                           &current_offset, &remaining);
    3329         246 :                 if (spdk_unlikely(rc)) {
    3330           4 :                         return;
    3331             :                 }
    3332             :         }
    3333          67 : }
    3334             : 
    3335             : static void
    3336           3 : bdev_unmap_split(struct spdk_bdev_io *bdev_io)
    3337             : {
    3338             :         uint64_t offset, unmap_blocks, remaining, max_unmap_blocks;
    3339           3 :         uint32_t num_children_reqs = 0;
    3340             :         int rc;
    3341             : 
    3342           3 :         assert(bdev_io->internal.f.split);
    3343             : 
    3344           3 :         offset = bdev_io->internal.split.current_offset_blocks;
    3345           3 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3346           3 :         max_unmap_blocks = bdev_io->bdev->max_unmap * bdev_io->bdev->max_unmap_segments;
    3347             : 
    3348          20 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS)) {
    3349          17 :                 unmap_blocks = spdk_min(remaining, max_unmap_blocks);
    3350             : 
    3351          17 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, unmap_blocks,
    3352             :                                           &offset, &remaining);
    3353          17 :                 if (spdk_likely(rc == 0)) {
    3354          17 :                         num_children_reqs++;
    3355          17 :                 } else {
    3356           0 :                         return;
    3357             :                 }
    3358             :         }
    3359           3 : }
    3360             : 
    3361             : static void
    3362           6 : bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io)
    3363             : {
    3364             :         uint64_t offset, write_zeroes_blocks, remaining;
    3365           6 :         uint32_t num_children_reqs = 0;
    3366             :         int rc;
    3367             : 
    3368           6 :         assert(bdev_io->internal.f.split);
    3369             : 
    3370           6 :         offset = bdev_io->internal.split.current_offset_blocks;
    3371           6 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3372             : 
    3373          29 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS)) {
    3374          23 :                 write_zeroes_blocks = spdk_min(remaining, bdev_io->bdev->max_write_zeroes);
    3375             : 
    3376          23 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, write_zeroes_blocks,
    3377             :                                           &offset, &remaining);
    3378          23 :                 if (spdk_likely(rc == 0)) {
    3379          23 :                         num_children_reqs++;
    3380          23 :                 } else {
    3381           0 :                         return;
    3382             :                 }
    3383             :         }
    3384           6 : }
    3385             : 
    3386             : static void
    3387           4 : bdev_copy_split(struct spdk_bdev_io *bdev_io)
    3388             : {
    3389             :         uint64_t offset, copy_blocks, remaining;
    3390           4 :         uint32_t num_children_reqs = 0;
    3391             :         int rc;
    3392             : 
    3393           4 :         assert(bdev_io->internal.f.split);
    3394             : 
    3395           4 :         offset = bdev_io->internal.split.current_offset_blocks;
    3396           4 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3397             : 
    3398           4 :         assert(bdev_io->bdev->max_copy != 0);
    3399          23 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_COPY_REQS)) {
    3400          19 :                 copy_blocks = spdk_min(remaining, bdev_io->bdev->max_copy);
    3401             : 
    3402          19 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, copy_blocks,
    3403             :                                           &offset, &remaining);
    3404          19 :                 if (spdk_likely(rc == 0)) {
    3405          19 :                         num_children_reqs++;
    3406          19 :                 } else {
    3407           0 :                         return;
    3408             :                 }
    3409             :         }
    3410           4 : }
    3411             : 
    3412             : static void
    3413          58 : parent_bdev_io_complete(void *ctx, int rc)
    3414             : {
    3415          58 :         struct spdk_bdev_io *parent_io = ctx;
    3416             : 
    3417          58 :         if (rc) {
    3418           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3419           0 :         }
    3420             : 
    3421         116 :         parent_io->internal.cb(parent_io, parent_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS,
    3422          58 :                                parent_io->internal.caller_ctx);
    3423          58 : }
    3424             : 
    3425             : static void
    3426           0 : bdev_io_complete_parent_sequence_cb(void *ctx, int status)
    3427             : {
    3428           0 :         struct spdk_bdev_io *bdev_io = ctx;
    3429             : 
    3430             :         /* u.bdev.accel_sequence should have already been cleared at this point */
    3431           0 :         assert(bdev_io->u.bdev.accel_sequence == NULL);
    3432           0 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    3433           0 :         bdev_io->internal.f.has_accel_sequence = false;
    3434             : 
    3435           0 :         if (spdk_unlikely(status != 0)) {
    3436           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    3437           0 :         }
    3438             : 
    3439           0 :         parent_bdev_io_complete(bdev_io, status);
    3440           0 : }
    3441             : 
    3442             : static void
    3443         301 : bdev_io_split_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    3444             : {
    3445         301 :         struct spdk_bdev_io *parent_io = cb_arg;
    3446             : 
    3447         301 :         spdk_bdev_free_io(bdev_io);
    3448             : 
    3449         301 :         assert(parent_io->internal.f.split);
    3450             : 
    3451         301 :         if (!success) {
    3452          21 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3453             :                 /* If any child I/O failed, stop further splitting process. */
    3454          21 :                 parent_io->internal.split.current_offset_blocks += parent_io->internal.split.remaining_num_blocks;
    3455          21 :                 parent_io->internal.split.remaining_num_blocks = 0;
    3456          21 :         }
    3457         301 :         parent_io->internal.split.outstanding--;
    3458         301 :         if (parent_io->internal.split.outstanding != 0) {
    3459         223 :                 return;
    3460             :         }
    3461             : 
    3462             :         /*
    3463             :          * Parent I/O finishes when all blocks are consumed.
    3464             :          */
    3465          78 :         if (parent_io->internal.split.remaining_num_blocks == 0) {
    3466          58 :                 assert(parent_io->internal.cb != bdev_io_split_done);
    3467          58 :                 bdev_ch_remove_from_io_submitted(parent_io);
    3468          58 :                 spdk_trace_record(TRACE_BDEV_IO_DONE, parent_io->internal.ch->trace_id,
    3469             :                                   0, (uintptr_t)parent_io, bdev_io->internal.caller_ctx,
    3470             :                                   parent_io->internal.ch->queue_depth);
    3471             : 
    3472          58 :                 if (spdk_likely(parent_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    3473          48 :                         if (bdev_io_needs_sequence_exec(parent_io->internal.desc, parent_io)) {
    3474           0 :                                 bdev_io_exec_sequence(parent_io, bdev_io_complete_parent_sequence_cb);
    3475           0 :                                 return;
    3476          48 :                         } else if (parent_io->internal.f.has_bounce_buf &&
    3477           0 :                                    !bdev_io_use_accel_sequence(bdev_io)) {
    3478             :                                 /* bdev IO will be completed in the callback */
    3479           0 :                                 _bdev_io_push_bounce_data_buffer(parent_io, parent_bdev_io_complete);
    3480           0 :                                 return;
    3481             :                         }
    3482          48 :                 }
    3483             : 
    3484          58 :                 parent_bdev_io_complete(parent_io, 0);
    3485          58 :                 return;
    3486             :         }
    3487             : 
    3488             :         /*
    3489             :          * Continue with the splitting process.  This function will complete the parent I/O if the
    3490             :          * splitting is done.
    3491             :          */
    3492          20 :         switch (parent_io->type) {
    3493             :         case SPDK_BDEV_IO_TYPE_READ:
    3494             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3495          17 :                 _bdev_rw_split(parent_io);
    3496          17 :                 break;
    3497             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3498           1 :                 bdev_unmap_split(parent_io);
    3499           1 :                 break;
    3500             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3501           1 :                 bdev_write_zeroes_split(parent_io);
    3502           1 :                 break;
    3503             :         case SPDK_BDEV_IO_TYPE_COPY:
    3504           1 :                 bdev_copy_split(parent_io);
    3505           1 :                 break;
    3506             :         default:
    3507           0 :                 assert(false);
    3508             :                 break;
    3509             :         }
    3510         301 : }
    3511             : 
    3512             : static void bdev_rw_split_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    3513             :                                      bool success);
    3514             : 
    3515             : static void
    3516          59 : bdev_io_split(struct spdk_bdev_io *bdev_io)
    3517             : {
    3518          59 :         assert(bdev_io_should_split(bdev_io));
    3519          59 :         assert(bdev_io->internal.f.split);
    3520             : 
    3521          59 :         bdev_io->internal.split.current_offset_blocks = bdev_io->u.bdev.offset_blocks;
    3522          59 :         bdev_io->internal.split.remaining_num_blocks = bdev_io->u.bdev.num_blocks;
    3523          59 :         bdev_io->internal.split.outstanding = 0;
    3524          59 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    3525             : 
    3526          59 :         switch (bdev_io->type) {
    3527             :         case SPDK_BDEV_IO_TYPE_READ:
    3528             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3529          49 :                 if (_is_buf_allocated(bdev_io->u.bdev.iovs)) {
    3530          49 :                         _bdev_rw_split(bdev_io);
    3531          49 :                 } else {
    3532           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3533           0 :                         spdk_bdev_io_get_buf(bdev_io, bdev_rw_split_get_buf_cb,
    3534           0 :                                              bdev_io->u.bdev.num_blocks * bdev_io_get_block_size(bdev_io));
    3535             :                 }
    3536          49 :                 break;
    3537             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3538           2 :                 bdev_unmap_split(bdev_io);
    3539           2 :                 break;
    3540             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3541           5 :                 bdev_write_zeroes_split(bdev_io);
    3542           5 :                 break;
    3543             :         case SPDK_BDEV_IO_TYPE_COPY:
    3544           3 :                 bdev_copy_split(bdev_io);
    3545           3 :                 break;
    3546             :         default:
    3547           0 :                 assert(false);
    3548             :                 break;
    3549             :         }
    3550          59 : }
    3551             : 
    3552             : static void
    3553           0 : bdev_rw_split_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io, bool success)
    3554             : {
    3555           0 :         if (!success) {
    3556           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    3557           0 :                 return;
    3558             :         }
    3559             : 
    3560           0 :         _bdev_rw_split(bdev_io);
    3561           0 : }
    3562             : 
    3563             : static inline void
    3564         579 : _bdev_io_submit(struct spdk_bdev_io *bdev_io)
    3565             : {
    3566         579 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3567         579 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    3568             : 
    3569         579 :         if (spdk_likely(bdev_ch->flags == 0)) {
    3570         554 :                 bdev_io_do_submit(bdev_ch, bdev_io);
    3571         554 :                 return;
    3572             :         }
    3573             : 
    3574          25 :         if (bdev_ch->flags & BDEV_CH_RESET_IN_PROGRESS) {
    3575           2 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    3576          25 :         } else if (bdev_ch->flags & BDEV_CH_QOS_ENABLED) {
    3577          23 :                 if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT) &&
    3578           2 :                     bdev_abort_queued_io(&bdev_ch->qos_queued_io, bdev_io->u.abort.bio_to_abort)) {
    3579           0 :                         _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
    3580           0 :                 } else {
    3581          23 :                         TAILQ_INSERT_TAIL(&bdev_ch->qos_queued_io, bdev_io, internal.link);
    3582          23 :                         bdev_qos_io_submit(bdev_ch, bdev->internal.qos);
    3583             :                 }
    3584          23 :         } else {
    3585           0 :                 SPDK_ERRLOG("unknown bdev_ch flag %x found\n", bdev_ch->flags);
    3586           0 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    3587             :         }
    3588         579 : }
    3589             : 
    3590             : bool bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2);
    3591             : 
    3592             : bool
    3593          23 : bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2)
    3594             : {
    3595          23 :         if (range1->length == 0 || range2->length == 0) {
    3596           1 :                 return false;
    3597             :         }
    3598             : 
    3599          22 :         if (range1->offset + range1->length <= range2->offset) {
    3600           1 :                 return false;
    3601             :         }
    3602             : 
    3603          21 :         if (range2->offset + range2->length <= range1->offset) {
    3604           3 :                 return false;
    3605             :         }
    3606             : 
    3607          18 :         return true;
    3608          23 : }
    3609             : 
    3610             : static bool
    3611          11 : bdev_io_range_is_locked(struct spdk_bdev_io *bdev_io, struct lba_range *range)
    3612             : {
    3613          11 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3614             :         struct lba_range r;
    3615             : 
    3616          11 :         switch (bdev_io->type) {
    3617             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3618             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3619             :                 /* Don't try to decode the NVMe command - just assume worst-case and that
    3620             :                  * it overlaps a locked range.
    3621             :                  */
    3622           0 :                 return true;
    3623             :         case SPDK_BDEV_IO_TYPE_READ:
    3624           6 :                 if (!range->quiesce) {
    3625           4 :                         return false;
    3626             :                 }
    3627             :         /* fallthrough */
    3628             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3629             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3630             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3631             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    3632             :         case SPDK_BDEV_IO_TYPE_COPY:
    3633           7 :                 r.offset = bdev_io->u.bdev.offset_blocks;
    3634           7 :                 r.length = bdev_io->u.bdev.num_blocks;
    3635           7 :                 if (!bdev_lba_range_overlapped(range, &r)) {
    3636             :                         /* This I/O doesn't overlap the specified LBA range. */
    3637           0 :                         return false;
    3638           7 :                 } else if (range->owner_ch == ch && range->locked_ctx == bdev_io->internal.caller_ctx) {
    3639             :                         /* This I/O overlaps, but the I/O is on the same channel that locked this
    3640             :                          * range, and the caller_ctx is the same as the locked_ctx.  This means
    3641             :                          * that this I/O is associated with the lock, and is allowed to execute.
    3642             :                          */
    3643           2 :                         return false;
    3644             :                 } else {
    3645           5 :                         return true;
    3646             :                 }
    3647             :         default:
    3648           0 :                 return false;
    3649             :         }
    3650          11 : }
    3651             : 
    3652             : void
    3653         639 : bdev_io_submit(struct spdk_bdev_io *bdev_io)
    3654             : {
    3655         639 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3656             : 
    3657         639 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_PENDING);
    3658             : 
    3659         639 :         if (!TAILQ_EMPTY(&ch->locked_ranges)) {
    3660             :                 struct lba_range *range;
    3661             : 
    3662          13 :                 TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
    3663           8 :                         if (bdev_io_range_is_locked(bdev_io, range)) {
    3664           3 :                                 TAILQ_INSERT_TAIL(&ch->io_locked, bdev_io, internal.ch_link);
    3665           3 :                                 return;
    3666             :                         }
    3667           5 :                 }
    3668           5 :         }
    3669             : 
    3670         636 :         bdev_ch_add_to_io_submitted(bdev_io);
    3671             : 
    3672         636 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    3673         636 :         spdk_trace_record_tsc(bdev_io->internal.submit_tsc, TRACE_BDEV_IO_START,
    3674             :                               ch->trace_id, bdev_io->u.bdev.num_blocks,
    3675             :                               (uintptr_t)bdev_io, (uint64_t)bdev_io->type, bdev_io->internal.caller_ctx,
    3676             :                               bdev_io->u.bdev.offset_blocks, ch->queue_depth);
    3677             : 
    3678         636 :         if (bdev_io->internal.f.split) {
    3679          59 :                 bdev_io_split(bdev_io);
    3680          59 :                 return;
    3681             :         }
    3682             : 
    3683         577 :         _bdev_io_submit(bdev_io);
    3684         639 : }
    3685             : 
    3686             : static inline int
    3687           2 : bdev_io_init_dif_ctx(struct spdk_bdev_io *bdev_io)
    3688             : {
    3689           2 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3690             :         struct spdk_dif_ctx_init_ext_opts dif_opts;
    3691             : 
    3692           2 :         memset(&bdev_io->u.bdev.dif_err, 0, sizeof(struct spdk_dif_error));
    3693             : 
    3694           2 :         dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
    3695           2 :         dif_opts.dif_pi_format = bdev->dif_pi_format;
    3696             : 
    3697           4 :         return spdk_dif_ctx_init(&bdev_io->u.bdev.dif_ctx,
    3698           2 :                                  bdev->blocklen,
    3699           2 :                                  bdev->md_len,
    3700           2 :                                  bdev->md_interleave,
    3701           2 :                                  bdev->dif_is_head_of_md,
    3702           2 :                                  bdev->dif_type,
    3703           2 :                                  bdev_io->u.bdev.dif_check_flags,
    3704           2 :                                  bdev_io->u.bdev.offset_blocks & 0xFFFFFFFF,
    3705             :                                  0xFFFF, 0, 0, 0, &dif_opts);
    3706             : }
    3707             : 
    3708             : static inline void
    3709           4 : _bdev_io_ext_use_bounce_buffer(struct spdk_bdev_io *bdev_io)
    3710             : {
    3711             :         /* bdev doesn't support memory domains, thereby buffers in this IO request can't
    3712             :          * be accessed directly. It is needed to allocate buffers before issuing IO operation.
    3713             :          * For write operation we need to pull buffers from memory domain before submitting IO.
    3714             :          * Once read operation completes, we need to use memory_domain push functionality to
    3715             :          * update data in original memory domain IO buffer
    3716             :          * This IO request will go through a regular IO flow, so clear memory domains pointers */
    3717           4 :         assert(bdev_io->internal.f.has_memory_domain);
    3718           4 :         bdev_io->u.bdev.memory_domain = NULL;
    3719           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    3720           8 :         _bdev_memory_domain_io_get_buf(bdev_io, _bdev_memory_domain_get_io_cb,
    3721           4 :                                        bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
    3722           4 : }
    3723             : 
    3724             : /* We need to allocate bounce buffer if bdev doesn't support memory domains, or if it does
    3725             :  * support them, but we need to execute an accel sequence and the data buffer is from accel
    3726             :  * memory domain (to avoid doing a push/pull from that domain).
    3727             :  */
    3728             : static inline bool
    3729         292 : bdev_io_needs_bounce_buffer(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    3730             : {
    3731         292 :         if (bdev_io_use_memory_domain(bdev_io)) {
    3732           4 :                 if (!desc->memory_domains_supported ||
    3733           0 :                     (bdev_io_needs_sequence_exec(desc, bdev_io) &&
    3734           0 :                      bdev_io->internal.memory_domain == spdk_accel_get_memory_domain())) {
    3735           4 :                         return true;
    3736             :                 }
    3737           0 :         }
    3738             : 
    3739         288 :         return false;
    3740         292 : }
    3741             : 
    3742             : static inline void
    3743         292 : _bdev_io_submit_ext(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    3744             : {
    3745         292 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3746             :         int rc;
    3747             : 
    3748         292 :         if (spdk_unlikely(ch->flags & BDEV_CH_RESET_IN_PROGRESS)) {
    3749           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_ABORTED;
    3750           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    3751           0 :                 return;
    3752             :         }
    3753             : 
    3754         292 :         if (bdev_io_needs_metadata(desc, bdev_io)) {
    3755           0 :                 rc = bdev_io_init_dif_ctx(bdev_io);
    3756           0 :                 if (spdk_unlikely(rc != 0)) {
    3757           0 :                         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3758           0 :                         bdev_io_complete_unsubmitted(bdev_io);
    3759           0 :                         return;
    3760             :                 }
    3761           0 :         }
    3762             : 
    3763         292 :         if (bdev_io_needs_bounce_buffer(desc, bdev_io)) {
    3764           4 :                 _bdev_io_ext_use_bounce_buffer(bdev_io);
    3765           4 :                 return;
    3766             :         }
    3767             : 
    3768         288 :         if (bdev_io_needs_sequence_exec(desc, bdev_io)) {
    3769           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    3770           0 :                         bdev_io_exec_sequence(bdev_io, bdev_io_submit_sequence_cb);
    3771           0 :                         return;
    3772             :                 }
    3773             :                 /* For reads we'll execute the sequence after the data is read, so, for now, only
    3774             :                  * clear out accel_sequence pointer and submit the IO */
    3775           0 :                 assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3776           0 :                 bdev_io->u.bdev.accel_sequence = NULL;
    3777           0 :         }
    3778             : 
    3779         288 :         bdev_io_submit(bdev_io);
    3780         292 : }
    3781             : 
    3782             : static void
    3783          11 : bdev_io_submit_reset(struct spdk_bdev_io *bdev_io)
    3784             : {
    3785          11 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3786          11 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    3787          11 :         struct spdk_io_channel *ch = bdev_ch->channel;
    3788             : 
    3789          11 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_PENDING);
    3790             : 
    3791          11 :         bdev_io->internal.f.in_submit_request = true;
    3792          11 :         bdev_submit_request(bdev, ch, bdev_io);
    3793          11 :         bdev_io->internal.f.in_submit_request = false;
    3794          11 : }
    3795             : 
    3796             : void
    3797         691 : bdev_io_init(struct spdk_bdev_io *bdev_io,
    3798             :              struct spdk_bdev *bdev, void *cb_arg,
    3799             :              spdk_bdev_io_completion_cb cb)
    3800             : {
    3801         691 :         bdev_io->bdev = bdev;
    3802         691 :         bdev_io->internal.f.raw = 0;
    3803         691 :         bdev_io->internal.caller_ctx = cb_arg;
    3804         691 :         bdev_io->internal.cb = cb;
    3805         691 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    3806         691 :         bdev_io->internal.f.in_submit_request = false;
    3807         691 :         bdev_io->internal.error.nvme.cdw0 = 0;
    3808         691 :         bdev_io->num_retries = 0;
    3809         691 :         bdev_io->internal.get_buf_cb = NULL;
    3810         691 :         bdev_io->internal.get_aux_buf_cb = NULL;
    3811         691 :         bdev_io->internal.data_transfer_cpl = NULL;
    3812         691 :         bdev_io->internal.f.split = bdev_io_should_split(bdev_io);
    3813         691 : }
    3814             : 
    3815             : static bool
    3816         523 : bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
    3817             : {
    3818         523 :         return bdev->fn_table->io_type_supported(bdev->ctxt, io_type);
    3819             : }
    3820             : 
    3821             : bool
    3822         171 : spdk_bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
    3823             : {
    3824             :         bool supported;
    3825             : 
    3826         171 :         supported = bdev_io_type_supported(bdev, io_type);
    3827             : 
    3828         171 :         if (!supported) {
    3829           7 :                 switch (io_type) {
    3830             :                 case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3831             :                         /* The bdev layer will emulate write zeroes as long as write is supported. */
    3832           0 :                         supported = bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE);
    3833           0 :                         break;
    3834             :                 default:
    3835           7 :                         break;
    3836             :                 }
    3837           7 :         }
    3838             : 
    3839         171 :         return supported;
    3840             : }
    3841             : 
    3842             : static const char *g_io_type_strings[] = {
    3843             :         [SPDK_BDEV_IO_TYPE_READ] = "read",
    3844             :         [SPDK_BDEV_IO_TYPE_WRITE] = "write",
    3845             :         [SPDK_BDEV_IO_TYPE_UNMAP] = "unmap",
    3846             :         [SPDK_BDEV_IO_TYPE_FLUSH] = "flush",
    3847             :         [SPDK_BDEV_IO_TYPE_RESET] = "reset",
    3848             :         [SPDK_BDEV_IO_TYPE_NVME_ADMIN] = "nvme_admin",
    3849             :         [SPDK_BDEV_IO_TYPE_NVME_IO] = "nvme_io",
    3850             :         [SPDK_BDEV_IO_TYPE_NVME_IO_MD] = "nvme_io_md",
    3851             :         [SPDK_BDEV_IO_TYPE_WRITE_ZEROES] = "write_zeroes",
    3852             :         [SPDK_BDEV_IO_TYPE_ZCOPY] = "zcopy",
    3853             :         [SPDK_BDEV_IO_TYPE_GET_ZONE_INFO] = "get_zone_info",
    3854             :         [SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT] = "zone_management",
    3855             :         [SPDK_BDEV_IO_TYPE_ZONE_APPEND] = "zone_append",
    3856             :         [SPDK_BDEV_IO_TYPE_COMPARE] = "compare",
    3857             :         [SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE] = "compare_and_write",
    3858             :         [SPDK_BDEV_IO_TYPE_ABORT] = "abort",
    3859             :         [SPDK_BDEV_IO_TYPE_SEEK_HOLE] = "seek_hole",
    3860             :         [SPDK_BDEV_IO_TYPE_SEEK_DATA] = "seek_data",
    3861             :         [SPDK_BDEV_IO_TYPE_COPY] = "copy",
    3862             :         [SPDK_BDEV_IO_TYPE_NVME_IOV_MD] = "nvme_iov_md",
    3863             : };
    3864             : 
    3865             : const char *
    3866           0 : spdk_bdev_get_io_type_name(enum spdk_bdev_io_type io_type)
    3867             : {
    3868           0 :         if (io_type <= SPDK_BDEV_IO_TYPE_INVALID || io_type >= SPDK_BDEV_NUM_IO_TYPES) {
    3869           0 :                 return NULL;
    3870             :         }
    3871             : 
    3872           0 :         return g_io_type_strings[io_type];
    3873           0 : }
    3874             : 
    3875             : int
    3876           0 : spdk_bdev_get_io_type(const char *io_type_string)
    3877             : {
    3878             :         int i;
    3879             : 
    3880           0 :         for (i = SPDK_BDEV_IO_TYPE_READ; i < SPDK_BDEV_NUM_IO_TYPES; ++i) {
    3881           0 :                 if (!strcmp(io_type_string, g_io_type_strings[i])) {
    3882           0 :                         return i;
    3883             :                 }
    3884           0 :         }
    3885             : 
    3886           0 :         return -1;
    3887           0 : }
    3888             : 
    3889             : uint64_t
    3890           0 : spdk_bdev_io_get_submit_tsc(struct spdk_bdev_io *bdev_io)
    3891             : {
    3892           0 :         return bdev_io->internal.submit_tsc;
    3893             : }
    3894             : 
    3895             : int
    3896           0 : spdk_bdev_dump_info_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    3897             : {
    3898           0 :         if (bdev->fn_table->dump_info_json) {
    3899           0 :                 return bdev->fn_table->dump_info_json(bdev->ctxt, w);
    3900             :         }
    3901             : 
    3902           0 :         return 0;
    3903           0 : }
    3904             : 
    3905             : static void
    3906          10 : bdev_qos_update_max_quota_per_timeslice(struct spdk_bdev_qos *qos)
    3907             : {
    3908          10 :         uint32_t max_per_timeslice = 0;
    3909             :         int i;
    3910             : 
    3911          50 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    3912          40 :                 if (qos->rate_limits[i].limit == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    3913          15 :                         qos->rate_limits[i].max_per_timeslice = 0;
    3914          15 :                         continue;
    3915             :                 }
    3916             : 
    3917          50 :                 max_per_timeslice = qos->rate_limits[i].limit *
    3918          25 :                                     SPDK_BDEV_QOS_TIMESLICE_IN_USEC / SPDK_SEC_TO_USEC;
    3919             : 
    3920          25 :                 qos->rate_limits[i].max_per_timeslice = spdk_max(max_per_timeslice,
    3921             :                                                         qos->rate_limits[i].min_per_timeslice);
    3922             : 
    3923          50 :                 __atomic_store_n(&qos->rate_limits[i].remaining_this_timeslice,
    3924          25 :                                  qos->rate_limits[i].max_per_timeslice, __ATOMIC_RELEASE);
    3925          25 :         }
    3926             : 
    3927          10 :         bdev_qos_set_ops(qos);
    3928          10 : }
    3929             : 
    3930             : static void
    3931           4 : bdev_channel_submit_qos_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    3932             :                            struct spdk_io_channel *io_ch, void *ctx)
    3933             : {
    3934           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    3935             :         int status;
    3936             : 
    3937           4 :         bdev_qos_io_submit(bdev_ch, bdev->internal.qos);
    3938             : 
    3939             :         /* if all IOs were sent then continue the iteration, otherwise - stop it */
    3940             :         /* TODO: channels round robing */
    3941           4 :         status = TAILQ_EMPTY(&bdev_ch->qos_queued_io) ? 0 : 1;
    3942             : 
    3943           4 :         spdk_bdev_for_each_channel_continue(i, status);
    3944           4 : }
    3945             : 
    3946             : 
    3947             : static void
    3948           2 : bdev_channel_submit_qos_io_done(struct spdk_bdev *bdev, void *ctx, int status)
    3949             : {
    3950             : 
    3951           2 : }
    3952             : 
    3953             : static int
    3954           3 : bdev_channel_poll_qos(void *arg)
    3955             : {
    3956           3 :         struct spdk_bdev *bdev = arg;
    3957           3 :         struct spdk_bdev_qos *qos = bdev->internal.qos;
    3958           3 :         uint64_t now = spdk_get_ticks();
    3959             :         int i;
    3960             :         int64_t remaining_last_timeslice;
    3961             : 
    3962           3 :         if (spdk_unlikely(qos->thread == NULL)) {
    3963             :                 /* Old QoS was unbound to remove and new QoS is not enabled yet. */
    3964           1 :                 return SPDK_POLLER_IDLE;
    3965             :         }
    3966             : 
    3967           2 :         if (now < (qos->last_timeslice + qos->timeslice_size)) {
    3968             :                 /* We received our callback earlier than expected - return
    3969             :                  *  immediately and wait to do accounting until at least one
    3970             :                  *  timeslice has actually expired.  This should never happen
    3971             :                  *  with a well-behaved timer implementation.
    3972             :                  */
    3973           0 :                 return SPDK_POLLER_IDLE;
    3974             :         }
    3975             : 
    3976             :         /* Reset for next round of rate limiting */
    3977          10 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    3978             :                 /* We may have allowed the IOs or bytes to slightly overrun in the last
    3979             :                  * timeslice. remaining_this_timeslice is signed, so if it's negative
    3980             :                  * here, we'll account for the overrun so that the next timeslice will
    3981             :                  * be appropriately reduced.
    3982             :                  */
    3983           8 :                 remaining_last_timeslice = __atomic_exchange_n(&qos->rate_limits[i].remaining_this_timeslice,
    3984             :                                            0, __ATOMIC_RELAXED);
    3985           8 :                 if (remaining_last_timeslice < 0) {
    3986             :                         /* There could be a race condition here as both bdev_qos_rw_queue_io() and bdev_channel_poll_qos()
    3987             :                          * potentially use 2 atomic ops each, so they can intertwine.
    3988             :                          * This race can potentially cause the limits to be a little fuzzy but won't cause any real damage.
    3989             :                          */
    3990           0 :                         __atomic_store_n(&qos->rate_limits[i].remaining_this_timeslice,
    3991           0 :                                          remaining_last_timeslice, __ATOMIC_RELAXED);
    3992           0 :                 }
    3993           8 :         }
    3994             : 
    3995           4 :         while (now >= (qos->last_timeslice + qos->timeslice_size)) {
    3996           2 :                 qos->last_timeslice += qos->timeslice_size;
    3997          10 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    3998          16 :                         __atomic_add_fetch(&qos->rate_limits[i].remaining_this_timeslice,
    3999           8 :                                            qos->rate_limits[i].max_per_timeslice, __ATOMIC_RELAXED);
    4000           8 :                 }
    4001             :         }
    4002             : 
    4003           2 :         spdk_bdev_for_each_channel(bdev, bdev_channel_submit_qos_io, qos,
    4004             :                                    bdev_channel_submit_qos_io_done);
    4005             : 
    4006           2 :         return SPDK_POLLER_BUSY;
    4007           3 : }
    4008             : 
    4009             : static void
    4010          74 : bdev_channel_destroy_resource(struct spdk_bdev_channel *ch)
    4011             : {
    4012             :         struct spdk_bdev_shared_resource *shared_resource;
    4013             :         struct lba_range *range;
    4014             : 
    4015          74 :         bdev_free_io_stat(ch->stat);
    4016             : #ifdef SPDK_CONFIG_VTUNE
    4017             :         bdev_free_io_stat(ch->prev_stat);
    4018             : #endif
    4019             : 
    4020          74 :         while (!TAILQ_EMPTY(&ch->locked_ranges)) {
    4021           0 :                 range = TAILQ_FIRST(&ch->locked_ranges);
    4022           0 :                 TAILQ_REMOVE(&ch->locked_ranges, range, tailq);
    4023           0 :                 free(range);
    4024             :         }
    4025             : 
    4026          74 :         spdk_put_io_channel(ch->channel);
    4027          74 :         spdk_put_io_channel(ch->accel_channel);
    4028             : 
    4029          74 :         shared_resource = ch->shared_resource;
    4030             : 
    4031          74 :         assert(TAILQ_EMPTY(&ch->io_locked));
    4032          74 :         assert(TAILQ_EMPTY(&ch->io_submitted));
    4033          74 :         assert(TAILQ_EMPTY(&ch->io_accel_exec));
    4034          74 :         assert(TAILQ_EMPTY(&ch->io_memory_domain));
    4035          74 :         assert(ch->io_outstanding == 0);
    4036          74 :         assert(shared_resource->ref > 0);
    4037          74 :         shared_resource->ref--;
    4038          74 :         if (shared_resource->ref == 0) {
    4039          73 :                 assert(shared_resource->io_outstanding == 0);
    4040          73 :                 TAILQ_REMOVE(&shared_resource->mgmt_ch->shared_resources, shared_resource, link);
    4041          73 :                 spdk_put_io_channel(spdk_io_channel_from_ctx(shared_resource->mgmt_ch));
    4042          73 :                 spdk_poller_unregister(&shared_resource->nomem_poller);
    4043          73 :                 free(shared_resource);
    4044          73 :         }
    4045          74 : }
    4046             : 
    4047             : static void
    4048          83 : bdev_enable_qos(struct spdk_bdev *bdev, struct spdk_bdev_channel *ch)
    4049             : {
    4050          83 :         struct spdk_bdev_qos    *qos = bdev->internal.qos;
    4051             :         int                     i;
    4052             : 
    4053          83 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    4054             : 
    4055             :         /* Rate limiting on this bdev enabled */
    4056          83 :         if (qos) {
    4057          17 :                 if (qos->ch == NULL) {
    4058             :                         struct spdk_io_channel *io_ch;
    4059             : 
    4060           9 :                         SPDK_DEBUGLOG(bdev, "Selecting channel %p as QoS channel for bdev %s on thread %p\n", ch,
    4061             :                                       bdev->name, spdk_get_thread());
    4062             : 
    4063             :                         /* No qos channel has been selected, so set one up */
    4064             : 
    4065             :                         /* Take another reference to ch */
    4066           9 :                         io_ch = spdk_get_io_channel(__bdev_to_io_dev(bdev));
    4067           9 :                         assert(io_ch != NULL);
    4068           9 :                         qos->ch = ch;
    4069             : 
    4070           9 :                         qos->thread = spdk_io_channel_get_thread(io_ch);
    4071             : 
    4072          45 :                         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4073          36 :                                 if (bdev_qos_is_iops_rate_limit(i) == true) {
    4074           9 :                                         qos->rate_limits[i].min_per_timeslice =
    4075             :                                                 SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE;
    4076           9 :                                 } else {
    4077          27 :                                         qos->rate_limits[i].min_per_timeslice =
    4078             :                                                 SPDK_BDEV_QOS_MIN_BYTE_PER_TIMESLICE;
    4079             :                                 }
    4080             : 
    4081          36 :                                 if (qos->rate_limits[i].limit == 0) {
    4082           2 :                                         qos->rate_limits[i].limit = SPDK_BDEV_QOS_LIMIT_NOT_DEFINED;
    4083           2 :                                 }
    4084          36 :                         }
    4085           9 :                         bdev_qos_update_max_quota_per_timeslice(qos);
    4086           9 :                         qos->timeslice_size =
    4087           9 :                                 SPDK_BDEV_QOS_TIMESLICE_IN_USEC * spdk_get_ticks_hz() / SPDK_SEC_TO_USEC;
    4088           9 :                         qos->last_timeslice = spdk_get_ticks();
    4089           9 :                         qos->poller = SPDK_POLLER_REGISTER(bdev_channel_poll_qos,
    4090             :                                                            bdev,
    4091             :                                                            SPDK_BDEV_QOS_TIMESLICE_IN_USEC);
    4092           9 :                 }
    4093             : 
    4094          17 :                 ch->flags |= BDEV_CH_QOS_ENABLED;
    4095          17 :         }
    4096          83 : }
    4097             : 
    4098             : struct poll_timeout_ctx {
    4099             :         struct spdk_bdev_desc   *desc;
    4100             :         uint64_t                timeout_in_sec;
    4101             :         spdk_bdev_io_timeout_cb cb_fn;
    4102             :         void                    *cb_arg;
    4103             : };
    4104             : 
    4105             : static void
    4106         268 : bdev_desc_free(struct spdk_bdev_desc *desc)
    4107             : {
    4108         268 :         spdk_spin_destroy(&desc->spinlock);
    4109         268 :         free(desc->media_events_buffer);
    4110         268 :         free(desc);
    4111         268 : }
    4112             : 
    4113             : static void
    4114           8 : bdev_channel_poll_timeout_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
    4115             : {
    4116           8 :         struct poll_timeout_ctx *ctx  = _ctx;
    4117           8 :         struct spdk_bdev_desc *desc = ctx->desc;
    4118             : 
    4119           8 :         free(ctx);
    4120             : 
    4121           8 :         spdk_spin_lock(&desc->spinlock);
    4122           8 :         desc->refs--;
    4123           8 :         if (desc->closed == true && desc->refs == 0) {
    4124           1 :                 spdk_spin_unlock(&desc->spinlock);
    4125           1 :                 bdev_desc_free(desc);
    4126           1 :                 return;
    4127             :         }
    4128           7 :         spdk_spin_unlock(&desc->spinlock);
    4129           8 : }
    4130             : 
    4131             : static void
    4132          13 : bdev_channel_poll_timeout_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    4133             :                              struct spdk_io_channel *io_ch, void *_ctx)
    4134             : {
    4135          13 :         struct poll_timeout_ctx *ctx  = _ctx;
    4136          13 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    4137          13 :         struct spdk_bdev_desc *desc = ctx->desc;
    4138             :         struct spdk_bdev_io *bdev_io;
    4139             :         uint64_t now;
    4140             : 
    4141          13 :         spdk_spin_lock(&desc->spinlock);
    4142          13 :         if (desc->closed == true) {
    4143           1 :                 spdk_spin_unlock(&desc->spinlock);
    4144           1 :                 spdk_bdev_for_each_channel_continue(i, -1);
    4145           1 :                 return;
    4146             :         }
    4147          12 :         spdk_spin_unlock(&desc->spinlock);
    4148             : 
    4149          12 :         now = spdk_get_ticks();
    4150          22 :         TAILQ_FOREACH(bdev_io, &bdev_ch->io_submitted, internal.ch_link) {
    4151             :                 /* Exclude any I/O that are generated via splitting. */
    4152          15 :                 if (bdev_io->internal.cb == bdev_io_split_done) {
    4153           3 :                         continue;
    4154             :                 }
    4155             : 
    4156             :                 /* Once we find an I/O that has not timed out, we can immediately
    4157             :                  * exit the loop.
    4158             :                  */
    4159          24 :                 if (now < (bdev_io->internal.submit_tsc +
    4160          12 :                            ctx->timeout_in_sec * spdk_get_ticks_hz())) {
    4161           5 :                         goto end;
    4162             :                 }
    4163             : 
    4164           7 :                 if (bdev_io->internal.desc == desc) {
    4165           7 :                         ctx->cb_fn(ctx->cb_arg, bdev_io);
    4166           7 :                 }
    4167          14 :         }
    4168             : 
    4169             : end:
    4170          12 :         spdk_bdev_for_each_channel_continue(i, 0);
    4171          13 : }
    4172             : 
    4173             : static int
    4174           8 : bdev_poll_timeout_io(void *arg)
    4175             : {
    4176           8 :         struct spdk_bdev_desc *desc = arg;
    4177           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    4178             :         struct poll_timeout_ctx *ctx;
    4179             : 
    4180           8 :         ctx = calloc(1, sizeof(struct poll_timeout_ctx));
    4181           8 :         if (!ctx) {
    4182           0 :                 SPDK_ERRLOG("failed to allocate memory\n");
    4183           0 :                 return SPDK_POLLER_BUSY;
    4184             :         }
    4185           8 :         ctx->desc = desc;
    4186           8 :         ctx->cb_arg = desc->cb_arg;
    4187           8 :         ctx->cb_fn = desc->cb_fn;
    4188           8 :         ctx->timeout_in_sec = desc->timeout_in_sec;
    4189             : 
    4190             :         /* Take a ref on the descriptor in case it gets closed while we are checking
    4191             :          * all of the channels.
    4192             :          */
    4193           8 :         spdk_spin_lock(&desc->spinlock);
    4194           8 :         desc->refs++;
    4195           8 :         spdk_spin_unlock(&desc->spinlock);
    4196             : 
    4197           8 :         spdk_bdev_for_each_channel(bdev, bdev_channel_poll_timeout_io, ctx,
    4198             :                                    bdev_channel_poll_timeout_io_done);
    4199             : 
    4200           8 :         return SPDK_POLLER_BUSY;
    4201           8 : }
    4202             : 
    4203             : int
    4204           5 : spdk_bdev_set_timeout(struct spdk_bdev_desc *desc, uint64_t timeout_in_sec,
    4205             :                       spdk_bdev_io_timeout_cb cb_fn, void *cb_arg)
    4206             : {
    4207           5 :         assert(desc->thread == spdk_get_thread());
    4208             : 
    4209           5 :         spdk_poller_unregister(&desc->io_timeout_poller);
    4210             : 
    4211           5 :         if (timeout_in_sec) {
    4212           4 :                 assert(cb_fn != NULL);
    4213           4 :                 desc->io_timeout_poller = SPDK_POLLER_REGISTER(bdev_poll_timeout_io,
    4214             :                                           desc,
    4215             :                                           SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * SPDK_SEC_TO_USEC /
    4216             :                                           1000);
    4217           4 :                 if (desc->io_timeout_poller == NULL) {
    4218           0 :                         SPDK_ERRLOG("can not register the desc timeout IO poller\n");
    4219           0 :                         return -1;
    4220             :                 }
    4221           4 :         }
    4222             : 
    4223           5 :         desc->cb_fn = cb_fn;
    4224           5 :         desc->cb_arg = cb_arg;
    4225           5 :         desc->timeout_in_sec = timeout_in_sec;
    4226             : 
    4227           5 :         return 0;
    4228           5 : }
    4229             : 
    4230             : static int
    4231          76 : bdev_channel_create(void *io_device, void *ctx_buf)
    4232             : {
    4233          76 :         struct spdk_bdev                *bdev = __bdev_from_io_dev(io_device);
    4234          76 :         struct spdk_bdev_channel        *ch = ctx_buf;
    4235             :         struct spdk_io_channel          *mgmt_io_ch;
    4236             :         struct spdk_bdev_mgmt_channel   *mgmt_ch;
    4237             :         struct spdk_bdev_shared_resource *shared_resource;
    4238             :         struct lba_range                *range;
    4239             : 
    4240          76 :         ch->bdev = bdev;
    4241          76 :         ch->channel = bdev->fn_table->get_io_channel(bdev->ctxt);
    4242          76 :         if (!ch->channel) {
    4243           2 :                 return -1;
    4244             :         }
    4245             : 
    4246          74 :         ch->accel_channel = spdk_accel_get_io_channel();
    4247          74 :         if (!ch->accel_channel) {
    4248           0 :                 spdk_put_io_channel(ch->channel);
    4249           0 :                 return -1;
    4250             :         }
    4251             : 
    4252          74 :         spdk_trace_record(TRACE_BDEV_IOCH_CREATE, bdev->internal.trace_id, 0, 0,
    4253             :                           spdk_thread_get_id(spdk_io_channel_get_thread(ch->channel)));
    4254             : 
    4255          74 :         assert(ch->histogram == NULL);
    4256          74 :         if (bdev->internal.histogram_enabled) {
    4257           0 :                 ch->histogram = spdk_histogram_data_alloc();
    4258           0 :                 if (ch->histogram == NULL) {
    4259           0 :                         SPDK_ERRLOG("Could not allocate histogram\n");
    4260           0 :                 }
    4261           0 :         }
    4262             : 
    4263          74 :         mgmt_io_ch = spdk_get_io_channel(&g_bdev_mgr);
    4264          74 :         if (!mgmt_io_ch) {
    4265           0 :                 spdk_put_io_channel(ch->channel);
    4266           0 :                 spdk_put_io_channel(ch->accel_channel);
    4267           0 :                 return -1;
    4268             :         }
    4269             : 
    4270          74 :         mgmt_ch = __io_ch_to_bdev_mgmt_ch(mgmt_io_ch);
    4271          76 :         TAILQ_FOREACH(shared_resource, &mgmt_ch->shared_resources, link) {
    4272           3 :                 if (shared_resource->shared_ch == ch->channel) {
    4273           1 :                         spdk_put_io_channel(mgmt_io_ch);
    4274           1 :                         shared_resource->ref++;
    4275           1 :                         break;
    4276             :                 }
    4277           2 :         }
    4278             : 
    4279          74 :         if (shared_resource == NULL) {
    4280          73 :                 shared_resource = calloc(1, sizeof(*shared_resource));
    4281          73 :                 if (shared_resource == NULL) {
    4282           0 :                         spdk_put_io_channel(ch->channel);
    4283           0 :                         spdk_put_io_channel(ch->accel_channel);
    4284           0 :                         spdk_put_io_channel(mgmt_io_ch);
    4285           0 :                         return -1;
    4286             :                 }
    4287             : 
    4288          73 :                 shared_resource->mgmt_ch = mgmt_ch;
    4289          73 :                 shared_resource->io_outstanding = 0;
    4290          73 :                 TAILQ_INIT(&shared_resource->nomem_io);
    4291          73 :                 shared_resource->nomem_threshold = 0;
    4292          73 :                 shared_resource->shared_ch = ch->channel;
    4293          73 :                 shared_resource->ref = 1;
    4294          73 :                 TAILQ_INSERT_TAIL(&mgmt_ch->shared_resources, shared_resource, link);
    4295          73 :         }
    4296             : 
    4297          74 :         ch->io_outstanding = 0;
    4298          74 :         TAILQ_INIT(&ch->queued_resets);
    4299          74 :         TAILQ_INIT(&ch->locked_ranges);
    4300          74 :         TAILQ_INIT(&ch->qos_queued_io);
    4301          74 :         ch->flags = 0;
    4302          74 :         ch->trace_id = bdev->internal.trace_id;
    4303          74 :         ch->shared_resource = shared_resource;
    4304             : 
    4305          74 :         TAILQ_INIT(&ch->io_submitted);
    4306          74 :         TAILQ_INIT(&ch->io_locked);
    4307          74 :         TAILQ_INIT(&ch->io_accel_exec);
    4308          74 :         TAILQ_INIT(&ch->io_memory_domain);
    4309             : 
    4310          74 :         ch->stat = bdev_alloc_io_stat(false);
    4311          74 :         if (ch->stat == NULL) {
    4312           0 :                 bdev_channel_destroy_resource(ch);
    4313           0 :                 return -1;
    4314             :         }
    4315             : 
    4316          74 :         ch->stat->ticks_rate = spdk_get_ticks_hz();
    4317             : 
    4318             : #ifdef SPDK_CONFIG_VTUNE
    4319             :         {
    4320             :                 char *name;
    4321             :                 __itt_init_ittlib(NULL, 0);
    4322             :                 name = spdk_sprintf_alloc("spdk_bdev_%s_%p", ch->bdev->name, ch);
    4323             :                 if (!name) {
    4324             :                         bdev_channel_destroy_resource(ch);
    4325             :                         return -1;
    4326             :                 }
    4327             :                 ch->handle = __itt_string_handle_create(name);
    4328             :                 free(name);
    4329             :                 ch->start_tsc = spdk_get_ticks();
    4330             :                 ch->interval_tsc = spdk_get_ticks_hz() / 100;
    4331             :                 ch->prev_stat = bdev_alloc_io_stat(false);
    4332             :                 if (ch->prev_stat == NULL) {
    4333             :                         bdev_channel_destroy_resource(ch);
    4334             :                         return -1;
    4335             :                 }
    4336             :         }
    4337             : #endif
    4338             : 
    4339          74 :         spdk_spin_lock(&bdev->internal.spinlock);
    4340          74 :         bdev_enable_qos(bdev, ch);
    4341             : 
    4342          75 :         TAILQ_FOREACH(range, &bdev->internal.locked_ranges, tailq) {
    4343             :                 struct lba_range *new_range;
    4344             : 
    4345           1 :                 new_range = calloc(1, sizeof(*new_range));
    4346           1 :                 if (new_range == NULL) {
    4347           0 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    4348           0 :                         bdev_channel_destroy_resource(ch);
    4349           0 :                         return -1;
    4350             :                 }
    4351           1 :                 new_range->length = range->length;
    4352           1 :                 new_range->offset = range->offset;
    4353           1 :                 new_range->locked_ctx = range->locked_ctx;
    4354           1 :                 TAILQ_INSERT_TAIL(&ch->locked_ranges, new_range, tailq);
    4355           1 :         }
    4356             : 
    4357          74 :         spdk_spin_unlock(&bdev->internal.spinlock);
    4358             : 
    4359          74 :         return 0;
    4360          76 : }
    4361             : 
    4362             : static int
    4363           0 : bdev_abort_all_buf_io_cb(struct spdk_iobuf_channel *ch, struct spdk_iobuf_entry *entry,
    4364             :                          void *cb_ctx)
    4365             : {
    4366           0 :         struct spdk_bdev_channel *bdev_ch = cb_ctx;
    4367             :         struct spdk_bdev_io *bdev_io;
    4368             :         uint64_t buf_len;
    4369             : 
    4370           0 :         bdev_io = SPDK_CONTAINEROF(entry, struct spdk_bdev_io, internal.iobuf);
    4371           0 :         if (bdev_io->internal.ch == bdev_ch) {
    4372           0 :                 buf_len = bdev_io_get_max_buf_len(bdev_io, bdev_io->internal.buf.len);
    4373           0 :                 spdk_iobuf_entry_abort(ch, entry, buf_len);
    4374           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    4375           0 :         }
    4376             : 
    4377           0 :         return 0;
    4378             : }
    4379             : 
    4380             : /*
    4381             :  * Abort I/O that are waiting on a data buffer.
    4382             :  */
    4383             : static void
    4384          96 : bdev_abort_all_buf_io(struct spdk_bdev_mgmt_channel *mgmt_ch, struct spdk_bdev_channel *ch)
    4385             : {
    4386          96 :         spdk_iobuf_for_each_entry(&mgmt_ch->iobuf, bdev_abort_all_buf_io_cb, ch);
    4387          96 : }
    4388             : 
    4389             : /*
    4390             :  * Abort I/O that are queued waiting for submission.  These types of I/O are
    4391             :  *  linked using the spdk_bdev_io link TAILQ_ENTRY.
    4392             :  */
    4393             : static void
    4394         188 : bdev_abort_all_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_channel *ch)
    4395             : {
    4396             :         struct spdk_bdev_io *bdev_io, *tmp;
    4397             : 
    4398         228 :         TAILQ_FOREACH_SAFE(bdev_io, queue, internal.link, tmp) {
    4399          40 :                 if (bdev_io->internal.ch == ch) {
    4400          40 :                         TAILQ_REMOVE(queue, bdev_io, internal.link);
    4401             :                         /*
    4402             :                          * spdk_bdev_io_complete() assumes that the completed I/O had
    4403             :                          *  been submitted to the bdev module.  Since in this case it
    4404             :                          *  hadn't, bump io_outstanding to account for the decrement
    4405             :                          *  that spdk_bdev_io_complete() will do.
    4406             :                          */
    4407          40 :                         if (bdev_io->type != SPDK_BDEV_IO_TYPE_RESET) {
    4408          39 :                                 bdev_io_increment_outstanding(ch, ch->shared_resource);
    4409          39 :                         }
    4410          40 :                         spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    4411          40 :                 }
    4412          40 :         }
    4413         188 : }
    4414             : 
    4415             : static bool
    4416          18 : bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_io *bio_to_abort)
    4417             : {
    4418             :         struct spdk_bdev_io *bdev_io;
    4419             : 
    4420          18 :         TAILQ_FOREACH(bdev_io, queue, internal.link) {
    4421           0 :                 if (bdev_io == bio_to_abort) {
    4422           0 :                         TAILQ_REMOVE(queue, bio_to_abort, internal.link);
    4423           0 :                         spdk_bdev_io_complete(bio_to_abort, SPDK_BDEV_IO_STATUS_ABORTED);
    4424           0 :                         return true;
    4425             :                 }
    4426           0 :         }
    4427             : 
    4428          18 :         return false;
    4429          18 : }
    4430             : 
    4431             : static int
    4432           0 : bdev_abort_buf_io_cb(struct spdk_iobuf_channel *ch, struct spdk_iobuf_entry *entry, void *cb_ctx)
    4433             : {
    4434           0 :         struct spdk_bdev_io *bdev_io, *bio_to_abort = cb_ctx;
    4435             :         uint64_t buf_len;
    4436             : 
    4437           0 :         bdev_io = SPDK_CONTAINEROF(entry, struct spdk_bdev_io, internal.iobuf);
    4438           0 :         if (bdev_io == bio_to_abort) {
    4439           0 :                 buf_len = bdev_io_get_max_buf_len(bdev_io, bdev_io->internal.buf.len);
    4440           0 :                 spdk_iobuf_entry_abort(ch, entry, buf_len);
    4441           0 :                 spdk_bdev_io_complete(bio_to_abort, SPDK_BDEV_IO_STATUS_ABORTED);
    4442           0 :                 return 1;
    4443             :         }
    4444             : 
    4445           0 :         return 0;
    4446           0 : }
    4447             : 
    4448             : static bool
    4449          16 : bdev_abort_buf_io(struct spdk_bdev_mgmt_channel *mgmt_ch, struct spdk_bdev_io *bio_to_abort)
    4450             : {
    4451             :         int rc;
    4452             : 
    4453          16 :         rc = spdk_iobuf_for_each_entry(&mgmt_ch->iobuf, bdev_abort_buf_io_cb, bio_to_abort);
    4454          16 :         return rc == 1;
    4455             : }
    4456             : 
    4457             : static void
    4458           7 : bdev_qos_channel_destroy(void *cb_arg)
    4459             : {
    4460           7 :         struct spdk_bdev_qos *qos = cb_arg;
    4461             : 
    4462           7 :         spdk_put_io_channel(spdk_io_channel_from_ctx(qos->ch));
    4463           7 :         spdk_poller_unregister(&qos->poller);
    4464             : 
    4465           7 :         SPDK_DEBUGLOG(bdev, "Free QoS %p.\n", qos);
    4466             : 
    4467           7 :         free(qos);
    4468           7 : }
    4469             : 
    4470             : static int
    4471           7 : bdev_qos_destroy(struct spdk_bdev *bdev)
    4472             : {
    4473             :         int i;
    4474             : 
    4475             :         /*
    4476             :          * Cleanly shutting down the QoS poller is tricky, because
    4477             :          * during the asynchronous operation the user could open
    4478             :          * a new descriptor and create a new channel, spawning
    4479             :          * a new QoS poller.
    4480             :          *
    4481             :          * The strategy is to create a new QoS structure here and swap it
    4482             :          * in. The shutdown path then continues to refer to the old one
    4483             :          * until it completes and then releases it.
    4484             :          */
    4485             :         struct spdk_bdev_qos *new_qos, *old_qos;
    4486             : 
    4487           7 :         old_qos = bdev->internal.qos;
    4488             : 
    4489           7 :         new_qos = calloc(1, sizeof(*new_qos));
    4490           7 :         if (!new_qos) {
    4491           0 :                 SPDK_ERRLOG("Unable to allocate memory to shut down QoS.\n");
    4492           0 :                 return -ENOMEM;
    4493             :         }
    4494             : 
    4495             :         /* Copy the old QoS data into the newly allocated structure */
    4496           7 :         memcpy(new_qos, old_qos, sizeof(*new_qos));
    4497             : 
    4498             :         /* Zero out the key parts of the QoS structure */
    4499           7 :         new_qos->ch = NULL;
    4500           7 :         new_qos->thread = NULL;
    4501           7 :         new_qos->poller = NULL;
    4502             :         /*
    4503             :          * The limit member of spdk_bdev_qos_limit structure is not zeroed.
    4504             :          * It will be used later for the new QoS structure.
    4505             :          */
    4506          35 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4507          28 :                 new_qos->rate_limits[i].remaining_this_timeslice = 0;
    4508          28 :                 new_qos->rate_limits[i].min_per_timeslice = 0;
    4509          28 :                 new_qos->rate_limits[i].max_per_timeslice = 0;
    4510          28 :         }
    4511             : 
    4512           7 :         bdev->internal.qos = new_qos;
    4513             : 
    4514           7 :         if (old_qos->thread == NULL) {
    4515           0 :                 free(old_qos);
    4516           0 :         } else {
    4517           7 :                 spdk_thread_send_msg(old_qos->thread, bdev_qos_channel_destroy, old_qos);
    4518             :         }
    4519             : 
    4520             :         /* It is safe to continue with destroying the bdev even though the QoS channel hasn't
    4521             :          * been destroyed yet. The destruction path will end up waiting for the final
    4522             :          * channel to be put before it releases resources. */
    4523             : 
    4524           7 :         return 0;
    4525           7 : }
    4526             : 
    4527             : void
    4528          78 : spdk_bdev_add_io_stat(struct spdk_bdev_io_stat *total, struct spdk_bdev_io_stat *add)
    4529             : {
    4530          78 :         total->bytes_read += add->bytes_read;
    4531          78 :         total->num_read_ops += add->num_read_ops;
    4532          78 :         total->bytes_written += add->bytes_written;
    4533          78 :         total->num_write_ops += add->num_write_ops;
    4534          78 :         total->bytes_unmapped += add->bytes_unmapped;
    4535          78 :         total->num_unmap_ops += add->num_unmap_ops;
    4536          78 :         total->bytes_copied += add->bytes_copied;
    4537          78 :         total->num_copy_ops += add->num_copy_ops;
    4538          78 :         total->read_latency_ticks += add->read_latency_ticks;
    4539          78 :         total->write_latency_ticks += add->write_latency_ticks;
    4540          78 :         total->unmap_latency_ticks += add->unmap_latency_ticks;
    4541          78 :         total->copy_latency_ticks += add->copy_latency_ticks;
    4542          78 :         if (total->max_read_latency_ticks < add->max_read_latency_ticks) {
    4543           7 :                 total->max_read_latency_ticks = add->max_read_latency_ticks;
    4544           7 :         }
    4545          78 :         if (total->min_read_latency_ticks > add->min_read_latency_ticks) {
    4546          39 :                 total->min_read_latency_ticks = add->min_read_latency_ticks;
    4547          39 :         }
    4548          78 :         if (total->max_write_latency_ticks < add->max_write_latency_ticks) {
    4549           4 :                 total->max_write_latency_ticks = add->max_write_latency_ticks;
    4550           4 :         }
    4551          78 :         if (total->min_write_latency_ticks > add->min_write_latency_ticks) {
    4552          24 :                 total->min_write_latency_ticks = add->min_write_latency_ticks;
    4553          24 :         }
    4554          78 :         if (total->max_unmap_latency_ticks < add->max_unmap_latency_ticks) {
    4555           0 :                 total->max_unmap_latency_ticks = add->max_unmap_latency_ticks;
    4556           0 :         }
    4557          78 :         if (total->min_unmap_latency_ticks > add->min_unmap_latency_ticks) {
    4558           3 :                 total->min_unmap_latency_ticks = add->min_unmap_latency_ticks;
    4559           3 :         }
    4560          78 :         if (total->max_copy_latency_ticks < add->max_copy_latency_ticks) {
    4561           0 :                 total->max_copy_latency_ticks = add->max_copy_latency_ticks;
    4562           0 :         }
    4563          78 :         if (total->min_copy_latency_ticks > add->min_copy_latency_ticks) {
    4564           4 :                 total->min_copy_latency_ticks = add->min_copy_latency_ticks;
    4565           4 :         }
    4566          78 : }
    4567             : 
    4568             : static void
    4569           5 : bdev_get_io_stat(struct spdk_bdev_io_stat *to_stat, struct spdk_bdev_io_stat *from_stat)
    4570             : {
    4571           5 :         memcpy(to_stat, from_stat, offsetof(struct spdk_bdev_io_stat, io_error));
    4572             : 
    4573           5 :         if (to_stat->io_error != NULL && from_stat->io_error != NULL) {
    4574           0 :                 memcpy(to_stat->io_error, from_stat->io_error,
    4575             :                        sizeof(struct spdk_bdev_io_error_stat));
    4576           0 :         }
    4577           5 : }
    4578             : 
    4579             : void
    4580         211 : spdk_bdev_reset_io_stat(struct spdk_bdev_io_stat *stat, enum spdk_bdev_reset_stat_mode mode)
    4581             : {
    4582         211 :         if (mode == SPDK_BDEV_RESET_STAT_NONE) {
    4583           5 :                 return;
    4584             :         }
    4585             : 
    4586         206 :         stat->max_read_latency_ticks = 0;
    4587         206 :         stat->min_read_latency_ticks = UINT64_MAX;
    4588         206 :         stat->max_write_latency_ticks = 0;
    4589         206 :         stat->min_write_latency_ticks = UINT64_MAX;
    4590         206 :         stat->max_unmap_latency_ticks = 0;
    4591         206 :         stat->min_unmap_latency_ticks = UINT64_MAX;
    4592         206 :         stat->max_copy_latency_ticks = 0;
    4593         206 :         stat->min_copy_latency_ticks = UINT64_MAX;
    4594             : 
    4595         206 :         if (mode != SPDK_BDEV_RESET_STAT_ALL) {
    4596           2 :                 return;
    4597             :         }
    4598             : 
    4599         204 :         stat->bytes_read = 0;
    4600         204 :         stat->num_read_ops = 0;
    4601         204 :         stat->bytes_written = 0;
    4602         204 :         stat->num_write_ops = 0;
    4603         204 :         stat->bytes_unmapped = 0;
    4604         204 :         stat->num_unmap_ops = 0;
    4605         204 :         stat->bytes_copied = 0;
    4606         204 :         stat->num_copy_ops = 0;
    4607         204 :         stat->read_latency_ticks = 0;
    4608         204 :         stat->write_latency_ticks = 0;
    4609         204 :         stat->unmap_latency_ticks = 0;
    4610         204 :         stat->copy_latency_ticks = 0;
    4611             : 
    4612         204 :         if (stat->io_error != NULL) {
    4613         129 :                 memset(stat->io_error, 0, sizeof(struct spdk_bdev_io_error_stat));
    4614         129 :         }
    4615         211 : }
    4616             : 
    4617             : struct spdk_bdev_io_stat *
    4618         202 : bdev_alloc_io_stat(bool io_error_stat)
    4619             : {
    4620             :         struct spdk_bdev_io_stat *stat;
    4621             : 
    4622         202 :         stat = malloc(sizeof(struct spdk_bdev_io_stat));
    4623         202 :         if (stat == NULL) {
    4624           0 :                 return NULL;
    4625             :         }
    4626             : 
    4627         202 :         if (io_error_stat) {
    4628         128 :                 stat->io_error = malloc(sizeof(struct spdk_bdev_io_error_stat));
    4629         128 :                 if (stat->io_error == NULL) {
    4630           0 :                         free(stat);
    4631           0 :                         return NULL;
    4632             :                 }
    4633         128 :         } else {
    4634          74 :                 stat->io_error = NULL;
    4635             :         }
    4636             : 
    4637         202 :         spdk_bdev_reset_io_stat(stat, SPDK_BDEV_RESET_STAT_ALL);
    4638             : 
    4639         202 :         return stat;
    4640         202 : }
    4641             : 
    4642             : void
    4643         202 : bdev_free_io_stat(struct spdk_bdev_io_stat *stat)
    4644             : {
    4645         202 :         if (stat != NULL) {
    4646         202 :                 free(stat->io_error);
    4647         202 :                 free(stat);
    4648         202 :         }
    4649         202 : }
    4650             : 
    4651             : void
    4652           0 : spdk_bdev_dump_io_stat_json(struct spdk_bdev_io_stat *stat, struct spdk_json_write_ctx *w)
    4653             : {
    4654             :         int i;
    4655             : 
    4656           0 :         spdk_json_write_named_uint64(w, "bytes_read", stat->bytes_read);
    4657           0 :         spdk_json_write_named_uint64(w, "num_read_ops", stat->num_read_ops);
    4658           0 :         spdk_json_write_named_uint64(w, "bytes_written", stat->bytes_written);
    4659           0 :         spdk_json_write_named_uint64(w, "num_write_ops", stat->num_write_ops);
    4660           0 :         spdk_json_write_named_uint64(w, "bytes_unmapped", stat->bytes_unmapped);
    4661           0 :         spdk_json_write_named_uint64(w, "num_unmap_ops", stat->num_unmap_ops);
    4662           0 :         spdk_json_write_named_uint64(w, "bytes_copied", stat->bytes_copied);
    4663           0 :         spdk_json_write_named_uint64(w, "num_copy_ops", stat->num_copy_ops);
    4664           0 :         spdk_json_write_named_uint64(w, "read_latency_ticks", stat->read_latency_ticks);
    4665           0 :         spdk_json_write_named_uint64(w, "max_read_latency_ticks", stat->max_read_latency_ticks);
    4666           0 :         spdk_json_write_named_uint64(w, "min_read_latency_ticks",
    4667           0 :                                      stat->min_read_latency_ticks != UINT64_MAX ?
    4668           0 :                                      stat->min_read_latency_ticks : 0);
    4669           0 :         spdk_json_write_named_uint64(w, "write_latency_ticks", stat->write_latency_ticks);
    4670           0 :         spdk_json_write_named_uint64(w, "max_write_latency_ticks", stat->max_write_latency_ticks);
    4671           0 :         spdk_json_write_named_uint64(w, "min_write_latency_ticks",
    4672           0 :                                      stat->min_write_latency_ticks != UINT64_MAX ?
    4673           0 :                                      stat->min_write_latency_ticks : 0);
    4674           0 :         spdk_json_write_named_uint64(w, "unmap_latency_ticks", stat->unmap_latency_ticks);
    4675           0 :         spdk_json_write_named_uint64(w, "max_unmap_latency_ticks", stat->max_unmap_latency_ticks);
    4676           0 :         spdk_json_write_named_uint64(w, "min_unmap_latency_ticks",
    4677           0 :                                      stat->min_unmap_latency_ticks != UINT64_MAX ?
    4678           0 :                                      stat->min_unmap_latency_ticks : 0);
    4679           0 :         spdk_json_write_named_uint64(w, "copy_latency_ticks", stat->copy_latency_ticks);
    4680           0 :         spdk_json_write_named_uint64(w, "max_copy_latency_ticks", stat->max_copy_latency_ticks);
    4681           0 :         spdk_json_write_named_uint64(w, "min_copy_latency_ticks",
    4682           0 :                                      stat->min_copy_latency_ticks != UINT64_MAX ?
    4683           0 :                                      stat->min_copy_latency_ticks : 0);
    4684             : 
    4685           0 :         if (stat->io_error != NULL) {
    4686           0 :                 spdk_json_write_named_object_begin(w, "io_error");
    4687           0 :                 for (i = 0; i < -SPDK_MIN_BDEV_IO_STATUS; i++) {
    4688           0 :                         if (stat->io_error->error_status[i] != 0) {
    4689           0 :                                 spdk_json_write_named_uint32(w, bdev_io_status_get_string(-(i + 1)),
    4690           0 :                                                              stat->io_error->error_status[i]);
    4691           0 :                         }
    4692           0 :                 }
    4693           0 :                 spdk_json_write_object_end(w);
    4694           0 :         }
    4695           0 : }
    4696             : 
    4697             : static void
    4698          78 : bdev_channel_abort_queued_ios(struct spdk_bdev_channel *ch)
    4699             : {
    4700          78 :         struct spdk_bdev_shared_resource *shared_resource = ch->shared_resource;
    4701          78 :         struct spdk_bdev_mgmt_channel *mgmt_ch = shared_resource->mgmt_ch;
    4702             : 
    4703          78 :         bdev_abort_all_queued_io(&shared_resource->nomem_io, ch);
    4704          78 :         bdev_abort_all_buf_io(mgmt_ch, ch);
    4705          78 : }
    4706             : 
    4707             : static void
    4708          74 : bdev_channel_destroy(void *io_device, void *ctx_buf)
    4709             : {
    4710          74 :         struct spdk_bdev_channel *ch = ctx_buf;
    4711             : 
    4712          74 :         SPDK_DEBUGLOG(bdev, "Destroying channel %p for bdev %s on thread %p\n", ch, ch->bdev->name,
    4713             :                       spdk_get_thread());
    4714             : 
    4715          74 :         spdk_trace_record(TRACE_BDEV_IOCH_DESTROY, ch->bdev->internal.trace_id, 0, 0,
    4716             :                           spdk_thread_get_id(spdk_io_channel_get_thread(ch->channel)));
    4717             : 
    4718             :         /* This channel is going away, so add its statistics into the bdev so that they don't get lost. */
    4719          74 :         spdk_spin_lock(&ch->bdev->internal.spinlock);
    4720          74 :         spdk_bdev_add_io_stat(ch->bdev->internal.stat, ch->stat);
    4721          74 :         spdk_spin_unlock(&ch->bdev->internal.spinlock);
    4722             : 
    4723          74 :         bdev_abort_all_queued_io(&ch->queued_resets, ch);
    4724             : 
    4725          74 :         bdev_channel_abort_queued_ios(ch);
    4726             : 
    4727          74 :         if (ch->histogram) {
    4728           0 :                 spdk_histogram_data_free(ch->histogram);
    4729           0 :         }
    4730             : 
    4731          74 :         bdev_channel_destroy_resource(ch);
    4732          74 : }
    4733             : 
    4734             : /*
    4735             :  * If the name already exists in the global bdev name tree, RB_INSERT() returns a pointer
    4736             :  * to it. Hence we do not have to call bdev_get_by_name() when using this function.
    4737             :  */
    4738             : static int
    4739         259 : bdev_name_add(struct spdk_bdev_name *bdev_name, struct spdk_bdev *bdev, const char *name)
    4740             : {
    4741             :         struct spdk_bdev_name *tmp;
    4742             : 
    4743         259 :         bdev_name->name = strdup(name);
    4744         259 :         if (bdev_name->name == NULL) {
    4745           0 :                 SPDK_ERRLOG("Unable to allocate bdev name\n");
    4746           0 :                 return -ENOMEM;
    4747             :         }
    4748             : 
    4749         259 :         bdev_name->bdev = bdev;
    4750             : 
    4751         259 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    4752         259 :         tmp = RB_INSERT(bdev_name_tree, &g_bdev_mgr.bdev_names, bdev_name);
    4753         259 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    4754             : 
    4755         259 :         if (tmp != NULL) {
    4756           4 :                 SPDK_ERRLOG("Bdev name %s already exists\n", name);
    4757           4 :                 free(bdev_name->name);
    4758           4 :                 return -EEXIST;
    4759             :         }
    4760             : 
    4761         255 :         return 0;
    4762         259 : }
    4763             : 
    4764             : static void
    4765         255 : bdev_name_del_unsafe(struct spdk_bdev_name *bdev_name)
    4766             : {
    4767         255 :         RB_REMOVE(bdev_name_tree, &g_bdev_mgr.bdev_names, bdev_name);
    4768         255 :         free(bdev_name->name);
    4769         255 : }
    4770             : 
    4771             : static void
    4772           5 : bdev_name_del(struct spdk_bdev_name *bdev_name)
    4773             : {
    4774           5 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    4775           5 :         bdev_name_del_unsafe(bdev_name);
    4776           5 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    4777           5 : }
    4778             : 
    4779             : int
    4780         134 : spdk_bdev_alias_add(struct spdk_bdev *bdev, const char *alias)
    4781             : {
    4782             :         struct spdk_bdev_alias *tmp;
    4783             :         int ret;
    4784             : 
    4785         134 :         if (alias == NULL) {
    4786           1 :                 SPDK_ERRLOG("Empty alias passed\n");
    4787           1 :                 return -EINVAL;
    4788             :         }
    4789             : 
    4790         133 :         tmp = calloc(1, sizeof(*tmp));
    4791         133 :         if (tmp == NULL) {
    4792           0 :                 SPDK_ERRLOG("Unable to allocate alias\n");
    4793           0 :                 return -ENOMEM;
    4794             :         }
    4795             : 
    4796         133 :         ret = bdev_name_add(&tmp->alias, bdev, alias);
    4797         133 :         if (ret != 0) {
    4798           4 :                 free(tmp);
    4799           4 :                 return ret;
    4800             :         }
    4801             : 
    4802         129 :         TAILQ_INSERT_TAIL(&bdev->aliases, tmp, tailq);
    4803             : 
    4804         129 :         return 0;
    4805         134 : }
    4806             : 
    4807             : static int
    4808         130 : bdev_alias_del(struct spdk_bdev *bdev, const char *alias,
    4809             :                void (*alias_del_fn)(struct spdk_bdev_name *n))
    4810             : {
    4811             :         struct spdk_bdev_alias *tmp;
    4812             : 
    4813         135 :         TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
    4814         131 :                 if (strcmp(alias, tmp->alias.name) == 0) {
    4815         126 :                         TAILQ_REMOVE(&bdev->aliases, tmp, tailq);
    4816         126 :                         alias_del_fn(&tmp->alias);
    4817         126 :                         free(tmp);
    4818         126 :                         return 0;
    4819             :                 }
    4820           5 :         }
    4821             : 
    4822           4 :         return -ENOENT;
    4823         130 : }
    4824             : 
    4825             : int
    4826           4 : spdk_bdev_alias_del(struct spdk_bdev *bdev, const char *alias)
    4827             : {
    4828             :         int rc;
    4829             : 
    4830           4 :         rc = bdev_alias_del(bdev, alias, bdev_name_del);
    4831           4 :         if (rc == -ENOENT) {
    4832           2 :                 SPDK_INFOLOG(bdev, "Alias %s does not exist\n", alias);
    4833           2 :         }
    4834             : 
    4835           4 :         return rc;
    4836             : }
    4837             : 
    4838             : void
    4839           2 : spdk_bdev_alias_del_all(struct spdk_bdev *bdev)
    4840             : {
    4841             :         struct spdk_bdev_alias *p, *tmp;
    4842             : 
    4843           5 :         TAILQ_FOREACH_SAFE(p, &bdev->aliases, tailq, tmp) {
    4844           3 :                 TAILQ_REMOVE(&bdev->aliases, p, tailq);
    4845           3 :                 bdev_name_del(&p->alias);
    4846           3 :                 free(p);
    4847           3 :         }
    4848           2 : }
    4849             : 
    4850             : struct spdk_io_channel *
    4851          76 : spdk_bdev_get_io_channel(struct spdk_bdev_desc *desc)
    4852             : {
    4853          76 :         return spdk_get_io_channel(__bdev_to_io_dev(spdk_bdev_desc_get_bdev(desc)));
    4854             : }
    4855             : 
    4856             : void *
    4857           0 : spdk_bdev_get_module_ctx(struct spdk_bdev_desc *desc)
    4858             : {
    4859           0 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    4860           0 :         void *ctx = NULL;
    4861             : 
    4862           0 :         if (bdev->fn_table->get_module_ctx) {
    4863           0 :                 ctx = bdev->fn_table->get_module_ctx(bdev->ctxt);
    4864           0 :         }
    4865             : 
    4866           0 :         return ctx;
    4867             : }
    4868             : 
    4869             : const char *
    4870           0 : spdk_bdev_get_module_name(const struct spdk_bdev *bdev)
    4871             : {
    4872           0 :         return bdev->module->name;
    4873             : }
    4874             : 
    4875             : const char *
    4876         255 : spdk_bdev_get_name(const struct spdk_bdev *bdev)
    4877             : {
    4878         255 :         return bdev->name;
    4879             : }
    4880             : 
    4881             : const char *
    4882           0 : spdk_bdev_get_product_name(const struct spdk_bdev *bdev)
    4883             : {
    4884           0 :         return bdev->product_name;
    4885             : }
    4886             : 
    4887             : const struct spdk_bdev_aliases_list *
    4888           0 : spdk_bdev_get_aliases(const struct spdk_bdev *bdev)
    4889             : {
    4890           0 :         return &bdev->aliases;
    4891             : }
    4892             : 
    4893             : uint32_t
    4894           5 : spdk_bdev_get_block_size(const struct spdk_bdev *bdev)
    4895             : {
    4896           5 :         return bdev->blocklen;
    4897             : }
    4898             : 
    4899             : uint32_t
    4900           0 : spdk_bdev_get_write_unit_size(const struct spdk_bdev *bdev)
    4901             : {
    4902           0 :         return bdev->write_unit_size;
    4903             : }
    4904             : 
    4905             : uint64_t
    4906           0 : spdk_bdev_get_num_blocks(const struct spdk_bdev *bdev)
    4907             : {
    4908           0 :         return bdev->blockcnt;
    4909             : }
    4910             : 
    4911             : const char *
    4912           0 : spdk_bdev_get_qos_rpc_type(enum spdk_bdev_qos_rate_limit_type type)
    4913             : {
    4914           0 :         return qos_rpc_type[type];
    4915             : }
    4916             : 
    4917             : void
    4918           0 : spdk_bdev_get_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits)
    4919             : {
    4920             :         int i;
    4921             : 
    4922           0 :         memset(limits, 0, sizeof(*limits) * SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES);
    4923             : 
    4924           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    4925           0 :         if (bdev->internal.qos) {
    4926           0 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4927           0 :                         if (bdev->internal.qos->rate_limits[i].limit !=
    4928             :                             SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    4929           0 :                                 limits[i] = bdev->internal.qos->rate_limits[i].limit;
    4930           0 :                                 if (bdev_qos_is_iops_rate_limit(i) == false) {
    4931             :                                         /* Change from Byte to Megabyte which is user visible. */
    4932           0 :                                         limits[i] = limits[i] / 1024 / 1024;
    4933           0 :                                 }
    4934           0 :                         }
    4935           0 :                 }
    4936           0 :         }
    4937           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    4938           0 : }
    4939             : 
    4940             : size_t
    4941         318 : spdk_bdev_get_buf_align(const struct spdk_bdev *bdev)
    4942             : {
    4943         318 :         return 1 << bdev->required_alignment;
    4944             : }
    4945             : 
    4946             : uint32_t
    4947           0 : spdk_bdev_get_optimal_io_boundary(const struct spdk_bdev *bdev)
    4948             : {
    4949           0 :         return bdev->optimal_io_boundary;
    4950             : }
    4951             : 
    4952             : bool
    4953           0 : spdk_bdev_has_write_cache(const struct spdk_bdev *bdev)
    4954             : {
    4955           0 :         return bdev->write_cache;
    4956             : }
    4957             : 
    4958             : const struct spdk_uuid *
    4959           0 : spdk_bdev_get_uuid(const struct spdk_bdev *bdev)
    4960             : {
    4961           0 :         return &bdev->uuid;
    4962             : }
    4963             : 
    4964             : uint16_t
    4965           0 : spdk_bdev_get_acwu(const struct spdk_bdev *bdev)
    4966             : {
    4967           0 :         return bdev->acwu;
    4968             : }
    4969             : 
    4970             : uint32_t
    4971          29 : spdk_bdev_get_md_size(const struct spdk_bdev *bdev)
    4972             : {
    4973          29 :         return bdev->md_len;
    4974             : }
    4975             : 
    4976             : bool
    4977         131 : spdk_bdev_is_md_interleaved(const struct spdk_bdev *bdev)
    4978             : {
    4979         131 :         return (bdev->md_len != 0) && bdev->md_interleave;
    4980             : }
    4981             : 
    4982             : bool
    4983         159 : spdk_bdev_is_md_separate(const struct spdk_bdev *bdev)
    4984             : {
    4985         159 :         return (bdev->md_len != 0) && !bdev->md_interleave;
    4986             : }
    4987             : 
    4988             : bool
    4989           0 : spdk_bdev_is_zoned(const struct spdk_bdev *bdev)
    4990             : {
    4991           0 :         return bdev->zoned;
    4992             : }
    4993             : 
    4994             : uint32_t
    4995         122 : spdk_bdev_get_data_block_size(const struct spdk_bdev *bdev)
    4996             : {
    4997         122 :         if (spdk_bdev_is_md_interleaved(bdev)) {
    4998           0 :                 return bdev->blocklen - bdev->md_len;
    4999             :         } else {
    5000         122 :                 return bdev->blocklen;
    5001             :         }
    5002         122 : }
    5003             : 
    5004             : uint32_t
    5005           0 : spdk_bdev_get_physical_block_size(const struct spdk_bdev *bdev)
    5006             : {
    5007           0 :         return bdev->phys_blocklen;
    5008             : }
    5009             : 
    5010             : static uint32_t
    5011           9 : _bdev_get_block_size_with_md(const struct spdk_bdev *bdev)
    5012             : {
    5013           9 :         if (!spdk_bdev_is_md_interleaved(bdev)) {
    5014           6 :                 return bdev->blocklen + bdev->md_len;
    5015             :         } else {
    5016           3 :                 return bdev->blocklen;
    5017             :         }
    5018           9 : }
    5019             : 
    5020             : /* We have to use the typedef in the function declaration to appease astyle. */
    5021             : typedef enum spdk_dif_type spdk_dif_type_t;
    5022             : typedef enum spdk_dif_pi_format spdk_dif_pi_format_t;
    5023             : 
    5024             : spdk_dif_type_t
    5025           0 : spdk_bdev_get_dif_type(const struct spdk_bdev *bdev)
    5026             : {
    5027           0 :         if (bdev->md_len != 0) {
    5028           0 :                 return bdev->dif_type;
    5029             :         } else {
    5030           0 :                 return SPDK_DIF_DISABLE;
    5031             :         }
    5032           0 : }
    5033             : 
    5034             : spdk_dif_pi_format_t
    5035           0 : spdk_bdev_get_dif_pi_format(const struct spdk_bdev *bdev)
    5036             : {
    5037           0 :         return bdev->dif_pi_format;
    5038             : }
    5039             : 
    5040             : bool
    5041           0 : spdk_bdev_is_dif_head_of_md(const struct spdk_bdev *bdev)
    5042             : {
    5043           0 :         if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
    5044           0 :                 return bdev->dif_is_head_of_md;
    5045             :         } else {
    5046           0 :                 return false;
    5047             :         }
    5048           0 : }
    5049             : 
    5050             : bool
    5051           0 : spdk_bdev_is_dif_check_enabled(const struct spdk_bdev *bdev,
    5052             :                                enum spdk_dif_check_type check_type)
    5053             : {
    5054           0 :         if (spdk_bdev_get_dif_type(bdev) == SPDK_DIF_DISABLE) {
    5055           0 :                 return false;
    5056             :         }
    5057             : 
    5058           0 :         switch (check_type) {
    5059             :         case SPDK_DIF_CHECK_TYPE_REFTAG:
    5060           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_REFTAG_CHECK) != 0;
    5061             :         case SPDK_DIF_CHECK_TYPE_APPTAG:
    5062           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_APPTAG_CHECK) != 0;
    5063             :         case SPDK_DIF_CHECK_TYPE_GUARD:
    5064           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_GUARD_CHECK) != 0;
    5065             :         default:
    5066           0 :                 return false;
    5067             :         }
    5068           0 : }
    5069             : 
    5070             : static uint32_t
    5071           3 : bdev_get_max_write(const struct spdk_bdev *bdev, uint64_t num_bytes)
    5072             : {
    5073             :         uint64_t aligned_length, max_write_blocks;
    5074             : 
    5075           3 :         aligned_length = num_bytes - (spdk_bdev_get_buf_align(bdev) - 1);
    5076           3 :         max_write_blocks = aligned_length / _bdev_get_block_size_with_md(bdev);
    5077           3 :         max_write_blocks -= max_write_blocks % bdev->write_unit_size;
    5078             : 
    5079           3 :         return max_write_blocks;
    5080             : }
    5081             : 
    5082             : uint32_t
    5083           1 : spdk_bdev_get_max_copy(const struct spdk_bdev *bdev)
    5084             : {
    5085           1 :         return bdev->max_copy;
    5086             : }
    5087             : 
    5088             : uint64_t
    5089           0 : spdk_bdev_get_qd(const struct spdk_bdev *bdev)
    5090             : {
    5091           0 :         return bdev->internal.measured_queue_depth;
    5092             : }
    5093             : 
    5094             : uint64_t
    5095           0 : spdk_bdev_get_qd_sampling_period(const struct spdk_bdev *bdev)
    5096             : {
    5097           0 :         return bdev->internal.period;
    5098             : }
    5099             : 
    5100             : uint64_t
    5101           0 : spdk_bdev_get_weighted_io_time(const struct spdk_bdev *bdev)
    5102             : {
    5103           0 :         return bdev->internal.weighted_io_time;
    5104             : }
    5105             : 
    5106             : uint64_t
    5107           0 : spdk_bdev_get_io_time(const struct spdk_bdev *bdev)
    5108             : {
    5109           0 :         return bdev->internal.io_time;
    5110             : }
    5111             : 
    5112           0 : union spdk_bdev_nvme_ctratt spdk_bdev_get_nvme_ctratt(struct spdk_bdev *bdev)
    5113             : {
    5114           0 :         return bdev->ctratt;
    5115             : }
    5116             : 
    5117             : uint32_t
    5118           0 : spdk_bdev_get_nvme_nsid(struct spdk_bdev *bdev)
    5119             : {
    5120           0 :         return bdev->nsid;
    5121             : }
    5122             : 
    5123             : uint32_t
    5124           0 : spdk_bdev_desc_get_block_size(struct spdk_bdev_desc *desc)
    5125             : {
    5126           0 :         struct spdk_bdev *bdev = desc->bdev;
    5127             : 
    5128           0 :         return desc->opts.hide_metadata ? bdev->blocklen - bdev->md_len : bdev->blocklen;
    5129             : }
    5130             : 
    5131             : uint32_t
    5132           0 : spdk_bdev_desc_get_md_size(struct spdk_bdev_desc *desc)
    5133             : {
    5134           0 :         struct spdk_bdev *bdev = desc->bdev;
    5135             : 
    5136           0 :         return desc->opts.hide_metadata ? 0 : bdev->md_len;
    5137             : }
    5138             : 
    5139             : bool
    5140           0 : spdk_bdev_desc_is_md_interleaved(struct spdk_bdev_desc *desc)
    5141             : {
    5142           0 :         struct spdk_bdev *bdev = desc->bdev;
    5143             : 
    5144           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_md_interleaved(bdev);
    5145             : }
    5146             : 
    5147             : bool
    5148           0 : spdk_bdev_desc_is_md_separate(struct spdk_bdev_desc *desc)
    5149             : {
    5150           0 :         struct spdk_bdev *bdev = desc->bdev;
    5151             : 
    5152           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_md_separate(bdev);
    5153             : }
    5154             : 
    5155             : spdk_dif_type_t
    5156           0 : spdk_bdev_desc_get_dif_type(struct spdk_bdev_desc *desc)
    5157             : {
    5158           0 :         struct spdk_bdev *bdev = desc->bdev;
    5159             : 
    5160           0 :         return desc->opts.hide_metadata ? SPDK_DIF_DISABLE : spdk_bdev_get_dif_type(bdev);
    5161             : }
    5162             : 
    5163             : spdk_dif_pi_format_t
    5164           0 : spdk_bdev_desc_get_dif_pi_format(struct spdk_bdev_desc *desc)
    5165             : {
    5166           0 :         struct spdk_bdev *bdev = desc->bdev;
    5167             : 
    5168           0 :         return desc->opts.hide_metadata ? SPDK_DIF_PI_FORMAT_16 : spdk_bdev_get_dif_pi_format(bdev);
    5169             : }
    5170             : 
    5171             : bool
    5172           0 : spdk_bdev_desc_is_dif_head_of_md(struct spdk_bdev_desc *desc)
    5173             : {
    5174           0 :         struct spdk_bdev *bdev = desc->bdev;
    5175             : 
    5176           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_dif_head_of_md(bdev);
    5177             : }
    5178             : 
    5179             : bool
    5180           0 : spdk_bdev_desc_is_dif_check_enabled(struct spdk_bdev_desc *desc,
    5181             :                                     enum spdk_dif_check_type check_type)
    5182             : {
    5183           0 :         struct spdk_bdev *bdev = desc->bdev;
    5184             : 
    5185           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_dif_check_enabled(bdev, check_type);
    5186             : }
    5187             : 
    5188             : static void bdev_update_qd_sampling_period(void *ctx);
    5189             : 
    5190             : static void
    5191           1 : _calculate_measured_qd_cpl(struct spdk_bdev *bdev, void *_ctx, int status)
    5192             : {
    5193           1 :         bdev->internal.measured_queue_depth = bdev->internal.temporary_queue_depth;
    5194             : 
    5195           1 :         if (bdev->internal.measured_queue_depth) {
    5196           0 :                 bdev->internal.io_time += bdev->internal.period;
    5197           0 :                 bdev->internal.weighted_io_time += bdev->internal.period * bdev->internal.measured_queue_depth;
    5198           0 :         }
    5199             : 
    5200           1 :         bdev->internal.qd_poll_in_progress = false;
    5201             : 
    5202           1 :         bdev_update_qd_sampling_period(bdev);
    5203           1 : }
    5204             : 
    5205             : static void
    5206           1 : _calculate_measured_qd(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    5207             :                        struct spdk_io_channel *io_ch, void *_ctx)
    5208             : {
    5209           1 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(io_ch);
    5210             : 
    5211           1 :         bdev->internal.temporary_queue_depth += ch->io_outstanding;
    5212           1 :         spdk_bdev_for_each_channel_continue(i, 0);
    5213           1 : }
    5214             : 
    5215             : static int
    5216           1 : bdev_calculate_measured_queue_depth(void *ctx)
    5217             : {
    5218           1 :         struct spdk_bdev *bdev = ctx;
    5219             : 
    5220           1 :         bdev->internal.qd_poll_in_progress = true;
    5221           1 :         bdev->internal.temporary_queue_depth = 0;
    5222           1 :         spdk_bdev_for_each_channel(bdev, _calculate_measured_qd, bdev, _calculate_measured_qd_cpl);
    5223           1 :         return SPDK_POLLER_BUSY;
    5224             : }
    5225             : 
    5226             : static void
    5227           5 : bdev_update_qd_sampling_period(void *ctx)
    5228             : {
    5229           5 :         struct spdk_bdev *bdev = ctx;
    5230             : 
    5231           5 :         if (bdev->internal.period == bdev->internal.new_period) {
    5232           0 :                 return;
    5233             :         }
    5234             : 
    5235           5 :         if (bdev->internal.qd_poll_in_progress) {
    5236           1 :                 return;
    5237             :         }
    5238             : 
    5239           4 :         bdev->internal.period = bdev->internal.new_period;
    5240             : 
    5241           4 :         spdk_poller_unregister(&bdev->internal.qd_poller);
    5242           4 :         if (bdev->internal.period != 0) {
    5243           2 :                 bdev->internal.qd_poller = SPDK_POLLER_REGISTER(bdev_calculate_measured_queue_depth,
    5244             :                                            bdev, bdev->internal.period);
    5245           2 :         } else {
    5246           2 :                 spdk_bdev_close(bdev->internal.qd_desc);
    5247           2 :                 bdev->internal.qd_desc = NULL;
    5248             :         }
    5249           5 : }
    5250             : 
    5251             : static void
    5252           0 : _tmp_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
    5253             : {
    5254           0 :         SPDK_NOTICELOG("Unexpected event type: %d\n", type);
    5255           0 : }
    5256             : 
    5257             : void
    5258         131 : spdk_bdev_set_qd_sampling_period(struct spdk_bdev *bdev, uint64_t period)
    5259             : {
    5260             :         int rc;
    5261             : 
    5262         131 :         if (bdev->internal.new_period == period) {
    5263         125 :                 return;
    5264             :         }
    5265             : 
    5266           6 :         bdev->internal.new_period = period;
    5267             : 
    5268           6 :         if (bdev->internal.qd_desc != NULL) {
    5269           4 :                 assert(bdev->internal.period != 0);
    5270             : 
    5271           8 :                 spdk_thread_send_msg(bdev->internal.qd_desc->thread,
    5272           4 :                                      bdev_update_qd_sampling_period, bdev);
    5273           4 :                 return;
    5274             :         }
    5275             : 
    5276           2 :         assert(bdev->internal.period == 0);
    5277             : 
    5278           4 :         rc = spdk_bdev_open_ext(spdk_bdev_get_name(bdev), false, _tmp_bdev_event_cb,
    5279           2 :                                 NULL, &bdev->internal.qd_desc);
    5280           2 :         if (rc != 0) {
    5281           0 :                 return;
    5282             :         }
    5283             : 
    5284           2 :         bdev->internal.period = period;
    5285           2 :         bdev->internal.qd_poller = SPDK_POLLER_REGISTER(bdev_calculate_measured_queue_depth,
    5286             :                                    bdev, period);
    5287         131 : }
    5288             : 
    5289             : struct bdev_get_current_qd_ctx {
    5290             :         uint64_t current_qd;
    5291             :         spdk_bdev_get_current_qd_cb cb_fn;
    5292             :         void *cb_arg;
    5293             : };
    5294             : 
    5295             : static void
    5296           0 : bdev_get_current_qd_done(struct spdk_bdev *bdev, void *_ctx, int status)
    5297             : {
    5298           0 :         struct bdev_get_current_qd_ctx *ctx = _ctx;
    5299             : 
    5300           0 :         ctx->cb_fn(bdev, ctx->current_qd, ctx->cb_arg, 0);
    5301             : 
    5302           0 :         free(ctx);
    5303           0 : }
    5304             : 
    5305             : static void
    5306           0 : bdev_get_current_qd(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    5307             :                     struct spdk_io_channel *io_ch, void *_ctx)
    5308             : {
    5309           0 :         struct bdev_get_current_qd_ctx *ctx = _ctx;
    5310           0 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    5311             : 
    5312           0 :         ctx->current_qd += bdev_ch->io_outstanding;
    5313             : 
    5314           0 :         spdk_bdev_for_each_channel_continue(i, 0);
    5315           0 : }
    5316             : 
    5317             : void
    5318           0 : spdk_bdev_get_current_qd(struct spdk_bdev *bdev, spdk_bdev_get_current_qd_cb cb_fn,
    5319             :                          void *cb_arg)
    5320             : {
    5321             :         struct bdev_get_current_qd_ctx *ctx;
    5322             : 
    5323           0 :         assert(cb_fn != NULL);
    5324             : 
    5325           0 :         ctx = calloc(1, sizeof(*ctx));
    5326           0 :         if (ctx == NULL) {
    5327           0 :                 cb_fn(bdev, 0, cb_arg, -ENOMEM);
    5328           0 :                 return;
    5329             :         }
    5330             : 
    5331           0 :         ctx->cb_fn = cb_fn;
    5332           0 :         ctx->cb_arg = cb_arg;
    5333             : 
    5334           0 :         spdk_bdev_for_each_channel(bdev, bdev_get_current_qd, ctx, bdev_get_current_qd_done);
    5335           0 : }
    5336             : 
    5337             : static void
    5338          25 : _event_notify(struct spdk_bdev_desc *desc, enum spdk_bdev_event_type type)
    5339             : {
    5340          25 :         assert(desc->thread == spdk_get_thread());
    5341             : 
    5342          25 :         spdk_spin_lock(&desc->spinlock);
    5343          25 :         desc->refs--;
    5344          25 :         if (!desc->closed) {
    5345          14 :                 spdk_spin_unlock(&desc->spinlock);
    5346          28 :                 desc->callback.event_fn(type,
    5347          14 :                                         desc->bdev,
    5348          14 :                                         desc->callback.ctx);
    5349          14 :                 return;
    5350          11 :         } else if (desc->refs == 0) {
    5351             :                 /* This descriptor was closed after this event_notify message was sent.
    5352             :                  * spdk_bdev_close() could not free the descriptor since this message was
    5353             :                  * in flight, so we free it now using bdev_desc_free().
    5354             :                  */
    5355          10 :                 spdk_spin_unlock(&desc->spinlock);
    5356          10 :                 bdev_desc_free(desc);
    5357          10 :                 return;
    5358             :         }
    5359           1 :         spdk_spin_unlock(&desc->spinlock);
    5360          25 : }
    5361             : 
    5362             : static void
    5363          25 : event_notify(struct spdk_bdev_desc *desc, spdk_msg_fn event_notify_fn)
    5364             : {
    5365          25 :         spdk_spin_lock(&desc->spinlock);
    5366          25 :         desc->refs++;
    5367          25 :         spdk_thread_send_msg(desc->thread, event_notify_fn, desc);
    5368          25 :         spdk_spin_unlock(&desc->spinlock);
    5369          25 : }
    5370             : 
    5371             : static void
    5372           6 : _resize_notify(void *ctx)
    5373             : {
    5374           6 :         struct spdk_bdev_desc *desc = ctx;
    5375             : 
    5376           6 :         _event_notify(desc, SPDK_BDEV_EVENT_RESIZE);
    5377           6 : }
    5378             : 
    5379             : int
    5380          11 : spdk_bdev_notify_blockcnt_change(struct spdk_bdev *bdev, uint64_t size)
    5381             : {
    5382             :         struct spdk_bdev_desc *desc;
    5383             :         int ret;
    5384             : 
    5385          11 :         if (size == bdev->blockcnt) {
    5386           0 :                 return 0;
    5387             :         }
    5388             : 
    5389          11 :         spdk_spin_lock(&bdev->internal.spinlock);
    5390             : 
    5391             :         /* bdev has open descriptors */
    5392          11 :         if (!TAILQ_EMPTY(&bdev->internal.open_descs) &&
    5393           7 :             bdev->blockcnt > size) {
    5394           1 :                 ret = -EBUSY;
    5395           1 :         } else {
    5396          10 :                 bdev->blockcnt = size;
    5397          16 :                 TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
    5398           6 :                         event_notify(desc, _resize_notify);
    5399           6 :                 }
    5400          10 :                 ret = 0;
    5401             :         }
    5402             : 
    5403          11 :         spdk_spin_unlock(&bdev->internal.spinlock);
    5404             : 
    5405          11 :         return ret;
    5406          11 : }
    5407             : 
    5408             : /*
    5409             :  * Convert I/O offset and length from bytes to blocks.
    5410             :  *
    5411             :  * Returns zero on success or non-zero if the byte parameters aren't divisible by the block size.
    5412             :  */
    5413             : static uint64_t
    5414          20 : bdev_bytes_to_blocks(struct spdk_bdev_desc *desc, uint64_t offset_bytes,
    5415             :                      uint64_t *offset_blocks, uint64_t num_bytes, uint64_t *num_blocks)
    5416             : {
    5417          20 :         uint32_t block_size = bdev_desc_get_block_size(desc);
    5418             :         uint8_t shift_cnt;
    5419             : 
    5420             :         /* Avoid expensive div operations if possible. These spdk_u32 functions are very cheap. */
    5421          20 :         if (spdk_likely(spdk_u32_is_pow2(block_size))) {
    5422          17 :                 shift_cnt = spdk_u32log2(block_size);
    5423          17 :                 *offset_blocks = offset_bytes >> shift_cnt;
    5424          17 :                 *num_blocks = num_bytes >> shift_cnt;
    5425          34 :                 return (offset_bytes - (*offset_blocks << shift_cnt)) |
    5426          17 :                        (num_bytes - (*num_blocks << shift_cnt));
    5427             :         } else {
    5428           3 :                 *offset_blocks = offset_bytes / block_size;
    5429           3 :                 *num_blocks = num_bytes / block_size;
    5430           3 :                 return (offset_bytes % block_size) | (num_bytes % block_size);
    5431             :         }
    5432          20 : }
    5433             : 
    5434             : static bool
    5435         689 : bdev_io_valid_blocks(struct spdk_bdev *bdev, uint64_t offset_blocks, uint64_t num_blocks)
    5436             : {
    5437             :         /* Return failure if offset_blocks + num_blocks is less than offset_blocks; indicates there
    5438             :          * has been an overflow and hence the offset has been wrapped around */
    5439         689 :         if (offset_blocks + num_blocks < offset_blocks) {
    5440           1 :                 return false;
    5441             :         }
    5442             : 
    5443             :         /* Return failure if offset_blocks + num_blocks exceeds the size of the bdev */
    5444         688 :         if (offset_blocks + num_blocks > bdev->blockcnt) {
    5445           2 :                 return false;
    5446             :         }
    5447             : 
    5448         686 :         return true;
    5449         689 : }
    5450             : 
    5451             : static void
    5452           2 : bdev_seek_complete_cb(void *ctx)
    5453             : {
    5454           2 :         struct spdk_bdev_io *bdev_io = ctx;
    5455             : 
    5456           2 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    5457           2 :         bdev_io->internal.cb(bdev_io, true, bdev_io->internal.caller_ctx);
    5458           2 : }
    5459             : 
    5460             : static int
    5461           4 : bdev_seek(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5462             :           uint64_t offset_blocks, enum spdk_bdev_io_type io_type,
    5463             :           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5464             : {
    5465           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5466             :         struct spdk_bdev_io *bdev_io;
    5467           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5468             : 
    5469           4 :         assert(io_type == SPDK_BDEV_IO_TYPE_SEEK_DATA || io_type == SPDK_BDEV_IO_TYPE_SEEK_HOLE);
    5470             : 
    5471             :         /* Check if offset_blocks is valid looking at the validity of one block */
    5472           4 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, 1)) {
    5473           0 :                 return -EINVAL;
    5474             :         }
    5475             : 
    5476           4 :         bdev_io = bdev_channel_get_io(channel);
    5477           4 :         if (!bdev_io) {
    5478           0 :                 return -ENOMEM;
    5479             :         }
    5480             : 
    5481           4 :         bdev_io->internal.ch = channel;
    5482           4 :         bdev_io->internal.desc = desc;
    5483           4 :         bdev_io->type = io_type;
    5484           4 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5485           4 :         bdev_io->u.bdev.memory_domain = NULL;
    5486           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5487           4 :         bdev_io->u.bdev.accel_sequence = NULL;
    5488           4 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5489             : 
    5490           4 :         if (!spdk_bdev_io_type_supported(bdev, io_type)) {
    5491             :                 /* In case bdev doesn't support seek to next data/hole offset,
    5492             :                  * it is assumed that only data and no holes are present */
    5493           2 :                 if (io_type == SPDK_BDEV_IO_TYPE_SEEK_DATA) {
    5494           1 :                         bdev_io->u.bdev.seek.offset = offset_blocks;
    5495           1 :                 } else {
    5496           1 :                         bdev_io->u.bdev.seek.offset = UINT64_MAX;
    5497             :                 }
    5498             : 
    5499           2 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_seek_complete_cb, bdev_io);
    5500           2 :                 return 0;
    5501             :         }
    5502             : 
    5503           2 :         bdev_io_submit(bdev_io);
    5504           2 :         return 0;
    5505           4 : }
    5506             : 
    5507             : int
    5508           2 : spdk_bdev_seek_data(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5509             :                     uint64_t offset_blocks,
    5510             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    5511             : {
    5512           2 :         return bdev_seek(desc, ch, offset_blocks, SPDK_BDEV_IO_TYPE_SEEK_DATA, cb, cb_arg);
    5513             : }
    5514             : 
    5515             : int
    5516           2 : spdk_bdev_seek_hole(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5517             :                     uint64_t offset_blocks,
    5518             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    5519             : {
    5520           2 :         return bdev_seek(desc, ch, offset_blocks, SPDK_BDEV_IO_TYPE_SEEK_HOLE, cb, cb_arg);
    5521             : }
    5522             : 
    5523             : uint64_t
    5524           4 : spdk_bdev_io_get_seek_offset(const struct spdk_bdev_io *bdev_io)
    5525             : {
    5526           4 :         return bdev_io->u.bdev.seek.offset;
    5527             : }
    5528             : 
    5529             : static int
    5530         204 : bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch, void *buf,
    5531             :                          void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5532             :                          spdk_bdev_io_completion_cb cb, void *cb_arg)
    5533             : {
    5534         204 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5535             :         struct spdk_bdev_io *bdev_io;
    5536         204 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5537             : 
    5538         204 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    5539           0 :                 return -EINVAL;
    5540             :         }
    5541             : 
    5542         204 :         bdev_io = bdev_channel_get_io(channel);
    5543         204 :         if (!bdev_io) {
    5544           1 :                 return -ENOMEM;
    5545             :         }
    5546             : 
    5547         203 :         bdev_io->internal.ch = channel;
    5548         203 :         bdev_io->internal.desc = desc;
    5549         203 :         bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
    5550         203 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    5551         203 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    5552         203 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev_desc_get_block_size(desc);
    5553         203 :         bdev_io->u.bdev.iovcnt = 1;
    5554         203 :         bdev_io->u.bdev.md_buf = md_buf;
    5555         203 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5556         203 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5557         203 :         bdev_io->u.bdev.memory_domain = NULL;
    5558         203 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5559         203 :         bdev_io->u.bdev.accel_sequence = NULL;
    5560         203 :         bdev_io->u.bdev.dif_check_flags = bdev->dif_check_flags;
    5561         203 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5562             : 
    5563         203 :         bdev_io_submit(bdev_io);
    5564         203 :         return 0;
    5565         204 : }
    5566             : 
    5567             : int
    5568           3 : spdk_bdev_read(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5569             :                void *buf, uint64_t offset, uint64_t nbytes,
    5570             :                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5571             : {
    5572             :         uint64_t offset_blocks, num_blocks;
    5573             : 
    5574           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5575           0 :                 return -EINVAL;
    5576             :         }
    5577             : 
    5578           3 :         return spdk_bdev_read_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
    5579           3 : }
    5580             : 
    5581             : int
    5582         200 : spdk_bdev_read_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5583             :                       void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    5584             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
    5585             : {
    5586         200 :         return bdev_read_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks, cb, cb_arg);
    5587             : }
    5588             : 
    5589             : int
    5590           4 : spdk_bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5591             :                               void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5592             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    5593             : {
    5594           8 :         struct iovec iov = {
    5595           4 :                 .iov_base = buf,
    5596             :         };
    5597             : 
    5598           4 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    5599           0 :                 return -EINVAL;
    5600             :         }
    5601             : 
    5602           4 :         if (md_buf && !_is_buf_allocated(&iov)) {
    5603           0 :                 return -EINVAL;
    5604             :         }
    5605             : 
    5606           8 :         return bdev_read_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    5607           4 :                                         cb, cb_arg);
    5608           4 : }
    5609             : 
    5610             : int
    5611           5 : spdk_bdev_readv(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5612             :                 struct iovec *iov, int iovcnt,
    5613             :                 uint64_t offset, uint64_t nbytes,
    5614             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5615             : {
    5616             :         uint64_t offset_blocks, num_blocks;
    5617             : 
    5618           5 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5619           0 :                 return -EINVAL;
    5620             :         }
    5621             : 
    5622           5 :         return spdk_bdev_readv_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
    5623           5 : }
    5624             : 
    5625             : static int
    5626         226 : bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5627             :                           struct iovec *iov, int iovcnt, void *md_buf, uint64_t offset_blocks,
    5628             :                           uint64_t num_blocks, struct spdk_memory_domain *domain, void *domain_ctx,
    5629             :                           struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
    5630             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5631             : {
    5632         226 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5633             :         struct spdk_bdev_io *bdev_io;
    5634         226 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5635             : 
    5636         226 :         if (spdk_unlikely(!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks))) {
    5637           0 :                 return -EINVAL;
    5638             :         }
    5639             : 
    5640         226 :         bdev_io = bdev_channel_get_io(channel);
    5641         226 :         if (spdk_unlikely(!bdev_io)) {
    5642           2 :                 return -ENOMEM;
    5643             :         }
    5644             : 
    5645         224 :         bdev_io->internal.ch = channel;
    5646         224 :         bdev_io->internal.desc = desc;
    5647         224 :         bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
    5648         224 :         bdev_io->u.bdev.iovs = iov;
    5649         224 :         bdev_io->u.bdev.iovcnt = iovcnt;
    5650         224 :         bdev_io->u.bdev.md_buf = md_buf;
    5651         224 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5652         224 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5653         224 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5654             : 
    5655         224 :         if (seq != NULL) {
    5656           0 :                 bdev_io->internal.f.has_accel_sequence = true;
    5657           0 :                 bdev_io->internal.accel_sequence = seq;
    5658           0 :         }
    5659             : 
    5660         224 :         if (domain != NULL) {
    5661           2 :                 bdev_io->internal.f.has_memory_domain = true;
    5662           2 :                 bdev_io->internal.memory_domain = domain;
    5663           2 :                 bdev_io->internal.memory_domain_ctx = domain_ctx;
    5664           2 :         }
    5665             : 
    5666         224 :         bdev_io->u.bdev.memory_domain = domain;
    5667         224 :         bdev_io->u.bdev.memory_domain_ctx = domain_ctx;
    5668         224 :         bdev_io->u.bdev.accel_sequence = seq;
    5669         224 :         bdev_io->u.bdev.dif_check_flags = dif_check_flags;
    5670             : 
    5671         224 :         _bdev_io_submit_ext(desc, bdev_io);
    5672             : 
    5673         224 :         return 0;
    5674         226 : }
    5675             : 
    5676             : int
    5677          21 : spdk_bdev_readv_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5678             :                        struct iovec *iov, int iovcnt,
    5679             :                        uint64_t offset_blocks, uint64_t num_blocks,
    5680             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    5681             : {
    5682          21 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5683             : 
    5684          42 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    5685          21 :                                          num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, cb, cb_arg);
    5686             : }
    5687             : 
    5688             : int
    5689           4 : spdk_bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5690             :                                struct iovec *iov, int iovcnt, void *md_buf,
    5691             :                                uint64_t offset_blocks, uint64_t num_blocks,
    5692             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5693             : {
    5694           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5695             : 
    5696           4 :         if (md_buf && !spdk_bdev_is_md_separate(bdev)) {
    5697           0 :                 return -EINVAL;
    5698             :         }
    5699             : 
    5700           4 :         if (md_buf && !_is_buf_allocated(iov)) {
    5701           0 :                 return -EINVAL;
    5702             :         }
    5703             : 
    5704           8 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    5705           4 :                                          num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, cb, cb_arg);
    5706           4 : }
    5707             : 
    5708             : static inline bool
    5709          14 : _bdev_io_check_opts(struct spdk_bdev_ext_io_opts *opts, struct iovec *iov)
    5710             : {
    5711             :         /*
    5712             :          * We check if opts size is at least of size when we first introduced
    5713             :          * spdk_bdev_ext_io_opts (ac6f2bdd8d) since access to those members
    5714             :          * are not checked internal.
    5715             :          */
    5716          24 :         return opts->size >= offsetof(struct spdk_bdev_ext_io_opts, metadata) +
    5717          14 :                sizeof(opts->metadata) &&
    5718          10 :                opts->size <= sizeof(*opts) &&
    5719             :                /* When memory domain is used, the user must provide data buffers */
    5720           8 :                (!opts->memory_domain || (iov && iov[0].iov_base));
    5721             : }
    5722             : 
    5723             : int
    5724           8 : spdk_bdev_readv_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5725             :                            struct iovec *iov, int iovcnt,
    5726             :                            uint64_t offset_blocks, uint64_t num_blocks,
    5727             :                            spdk_bdev_io_completion_cb cb, void *cb_arg,
    5728             :                            struct spdk_bdev_ext_io_opts *opts)
    5729             : {
    5730           8 :         struct spdk_memory_domain *domain = NULL;
    5731           8 :         struct spdk_accel_sequence *seq = NULL;
    5732           8 :         void *domain_ctx = NULL, *md = NULL;
    5733           8 :         uint32_t dif_check_flags = 0;
    5734           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5735             : 
    5736           8 :         if (opts) {
    5737           7 :                 if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
    5738           3 :                         return -EINVAL;
    5739             :                 }
    5740             : 
    5741           4 :                 md = opts->metadata;
    5742           4 :                 domain = bdev_get_ext_io_opt(opts, memory_domain, NULL);
    5743           4 :                 domain_ctx = bdev_get_ext_io_opt(opts, memory_domain_ctx, NULL);
    5744           4 :                 seq = bdev_get_ext_io_opt(opts, accel_sequence, NULL);
    5745           4 :                 if (md) {
    5746           4 :                         if (spdk_unlikely(!spdk_bdev_is_md_separate(bdev))) {
    5747           0 :                                 return -EINVAL;
    5748             :                         }
    5749             : 
    5750           4 :                         if (spdk_unlikely(!_is_buf_allocated(iov))) {
    5751           0 :                                 return -EINVAL;
    5752             :                         }
    5753             : 
    5754           4 :                         if (spdk_unlikely(seq != NULL)) {
    5755           0 :                                 return -EINVAL;
    5756             :                         }
    5757           4 :                 }
    5758           4 :         }
    5759             : 
    5760          10 :         dif_check_flags = bdev->dif_check_flags &
    5761           5 :                           ~(bdev_get_ext_io_opt(opts, dif_check_flags_exclude_mask, 0));
    5762             : 
    5763          10 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, md, offset_blocks,
    5764           5 :                                          num_blocks, domain, domain_ctx, seq, dif_check_flags, cb, cb_arg);
    5765           8 : }
    5766             : 
    5767             : static int
    5768          36 : bdev_write_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5769             :                           void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5770             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5771             : {
    5772          36 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5773             :         struct spdk_bdev_io *bdev_io;
    5774          36 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5775             : 
    5776          36 :         if (!desc->write) {
    5777           0 :                 return -EBADF;
    5778             :         }
    5779             : 
    5780          36 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    5781           0 :                 return -EINVAL;
    5782             :         }
    5783             : 
    5784          36 :         bdev_io = bdev_channel_get_io(channel);
    5785          36 :         if (!bdev_io) {
    5786           0 :                 return -ENOMEM;
    5787             :         }
    5788             : 
    5789          36 :         bdev_io->internal.ch = channel;
    5790          36 :         bdev_io->internal.desc = desc;
    5791          36 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
    5792          36 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    5793          36 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    5794          36 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev_desc_get_block_size(desc);
    5795          36 :         bdev_io->u.bdev.iovcnt = 1;
    5796          36 :         bdev_io->u.bdev.md_buf = md_buf;
    5797          36 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5798          36 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5799          36 :         bdev_io->u.bdev.memory_domain = NULL;
    5800          36 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5801          36 :         bdev_io->u.bdev.accel_sequence = NULL;
    5802          36 :         bdev_io->u.bdev.dif_check_flags = bdev->dif_check_flags;
    5803          36 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5804             : 
    5805          36 :         bdev_io_submit(bdev_io);
    5806          36 :         return 0;
    5807          36 : }
    5808             : 
    5809             : int
    5810           3 : spdk_bdev_write(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5811             :                 void *buf, uint64_t offset, uint64_t nbytes,
    5812             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5813             : {
    5814             :         uint64_t offset_blocks, num_blocks;
    5815             : 
    5816           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5817           0 :                 return -EINVAL;
    5818             :         }
    5819             : 
    5820           3 :         return spdk_bdev_write_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
    5821           3 : }
    5822             : 
    5823             : int
    5824          27 : spdk_bdev_write_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5825             :                        void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    5826             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    5827             : {
    5828          54 :         return bdev_write_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks,
    5829          27 :                                          cb, cb_arg);
    5830             : }
    5831             : 
    5832             : int
    5833           3 : spdk_bdev_write_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5834             :                                void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5835             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5836             : {
    5837           6 :         struct iovec iov = {
    5838           3 :                 .iov_base = buf,
    5839             :         };
    5840             : 
    5841           3 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    5842           0 :                 return -EINVAL;
    5843             :         }
    5844             : 
    5845           3 :         if (md_buf && !_is_buf_allocated(&iov)) {
    5846           0 :                 return -EINVAL;
    5847             :         }
    5848             : 
    5849           6 :         return bdev_write_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    5850           3 :                                          cb, cb_arg);
    5851           3 : }
    5852             : 
    5853             : static int
    5854          70 : bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5855             :                            struct iovec *iov, int iovcnt, void *md_buf,
    5856             :                            uint64_t offset_blocks, uint64_t num_blocks,
    5857             :                            struct spdk_memory_domain *domain, void *domain_ctx,
    5858             :                            struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
    5859             :                            uint32_t nvme_cdw12_raw, uint32_t nvme_cdw13_raw,
    5860             :                            spdk_bdev_io_completion_cb cb, void *cb_arg)
    5861             : {
    5862          70 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5863             :         struct spdk_bdev_io *bdev_io;
    5864          70 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5865             : 
    5866          70 :         if (spdk_unlikely(!desc->write)) {
    5867           0 :                 return -EBADF;
    5868             :         }
    5869             : 
    5870          70 :         if (spdk_unlikely(!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks))) {
    5871           0 :                 return -EINVAL;
    5872             :         }
    5873             : 
    5874          70 :         bdev_io = bdev_channel_get_io(channel);
    5875          70 :         if (spdk_unlikely(!bdev_io)) {
    5876           2 :                 return -ENOMEM;
    5877             :         }
    5878             : 
    5879          68 :         bdev_io->internal.ch = channel;
    5880          68 :         bdev_io->internal.desc = desc;
    5881          68 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
    5882          68 :         bdev_io->u.bdev.iovs = iov;
    5883          68 :         bdev_io->u.bdev.iovcnt = iovcnt;
    5884          68 :         bdev_io->u.bdev.md_buf = md_buf;
    5885          68 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5886          68 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5887          68 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5888          68 :         if (seq != NULL) {
    5889           0 :                 bdev_io->internal.f.has_accel_sequence = true;
    5890           0 :                 bdev_io->internal.accel_sequence = seq;
    5891           0 :         }
    5892             : 
    5893          68 :         if (domain != NULL) {
    5894           2 :                 bdev_io->internal.f.has_memory_domain = true;
    5895           2 :                 bdev_io->internal.memory_domain = domain;
    5896           2 :                 bdev_io->internal.memory_domain_ctx = domain_ctx;
    5897           2 :         }
    5898             : 
    5899          68 :         bdev_io->u.bdev.memory_domain = domain;
    5900          68 :         bdev_io->u.bdev.memory_domain_ctx = domain_ctx;
    5901          68 :         bdev_io->u.bdev.accel_sequence = seq;
    5902          68 :         bdev_io->u.bdev.dif_check_flags = dif_check_flags;
    5903          68 :         bdev_io->u.bdev.nvme_cdw12.raw = nvme_cdw12_raw;
    5904          68 :         bdev_io->u.bdev.nvme_cdw13.raw = nvme_cdw13_raw;
    5905             : 
    5906          68 :         _bdev_io_submit_ext(desc, bdev_io);
    5907             : 
    5908          68 :         return 0;
    5909          70 : }
    5910             : 
    5911             : int
    5912           3 : spdk_bdev_writev(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5913             :                  struct iovec *iov, int iovcnt,
    5914             :                  uint64_t offset, uint64_t len,
    5915             :                  spdk_bdev_io_completion_cb cb, void *cb_arg)
    5916             : {
    5917             :         uint64_t offset_blocks, num_blocks;
    5918             : 
    5919           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, len, &num_blocks) != 0) {
    5920           0 :                 return -EINVAL;
    5921             :         }
    5922             : 
    5923           3 :         return spdk_bdev_writev_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
    5924           3 : }
    5925             : 
    5926             : int
    5927          14 : spdk_bdev_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5928             :                         struct iovec *iov, int iovcnt,
    5929             :                         uint64_t offset_blocks, uint64_t num_blocks,
    5930             :                         spdk_bdev_io_completion_cb cb, void *cb_arg)
    5931             : {
    5932          14 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5933             : 
    5934          28 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    5935          14 :                                           num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, 0, 0,
    5936          14 :                                           cb, cb_arg);
    5937             : }
    5938             : 
    5939             : int
    5940           1 : spdk_bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5941             :                                 struct iovec *iov, int iovcnt, void *md_buf,
    5942             :                                 uint64_t offset_blocks, uint64_t num_blocks,
    5943             :                                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5944             : {
    5945           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5946             : 
    5947           1 :         if (md_buf && !spdk_bdev_is_md_separate(bdev)) {
    5948           0 :                 return -EINVAL;
    5949             :         }
    5950             : 
    5951           1 :         if (md_buf && !_is_buf_allocated(iov)) {
    5952           0 :                 return -EINVAL;
    5953             :         }
    5954             : 
    5955           2 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    5956           1 :                                           num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, 0, 0,
    5957           1 :                                           cb, cb_arg);
    5958           1 : }
    5959             : 
    5960             : int
    5961           8 : spdk_bdev_writev_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5962             :                             struct iovec *iov, int iovcnt,
    5963             :                             uint64_t offset_blocks, uint64_t num_blocks,
    5964             :                             spdk_bdev_io_completion_cb cb, void *cb_arg,
    5965             :                             struct spdk_bdev_ext_io_opts *opts)
    5966             : {
    5967           8 :         struct spdk_memory_domain *domain = NULL;
    5968           8 :         struct spdk_accel_sequence *seq = NULL;
    5969           8 :         void *domain_ctx = NULL, *md = NULL;
    5970           8 :         uint32_t dif_check_flags = 0;
    5971           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5972           8 :         uint32_t nvme_cdw12_raw = 0;
    5973           8 :         uint32_t nvme_cdw13_raw = 0;
    5974             : 
    5975           8 :         if (opts) {
    5976           7 :                 if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
    5977           3 :                         return -EINVAL;
    5978             :                 }
    5979           4 :                 md = opts->metadata;
    5980           4 :                 domain = bdev_get_ext_io_opt(opts, memory_domain, NULL);
    5981           4 :                 domain_ctx = bdev_get_ext_io_opt(opts, memory_domain_ctx, NULL);
    5982           4 :                 seq = bdev_get_ext_io_opt(opts, accel_sequence, NULL);
    5983           4 :                 nvme_cdw12_raw = bdev_get_ext_io_opt(opts, nvme_cdw12.raw, 0);
    5984           4 :                 nvme_cdw13_raw = bdev_get_ext_io_opt(opts, nvme_cdw13.raw, 0);
    5985           4 :                 if (md) {
    5986           4 :                         if (spdk_unlikely(!spdk_bdev_is_md_separate(bdev))) {
    5987           0 :                                 return -EINVAL;
    5988             :                         }
    5989             : 
    5990           4 :                         if (spdk_unlikely(!_is_buf_allocated(iov))) {
    5991           0 :                                 return -EINVAL;
    5992             :                         }
    5993             : 
    5994           4 :                         if (spdk_unlikely(seq != NULL)) {
    5995           0 :                                 return -EINVAL;
    5996             :                         }
    5997           4 :                 }
    5998           4 :         }
    5999             : 
    6000          10 :         dif_check_flags = bdev->dif_check_flags &
    6001           5 :                           ~(bdev_get_ext_io_opt(opts, dif_check_flags_exclude_mask, 0));
    6002             : 
    6003          10 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, md, offset_blocks, num_blocks,
    6004           5 :                                           domain, domain_ctx, seq, dif_check_flags,
    6005           5 :                                           nvme_cdw12_raw, nvme_cdw13_raw, cb, cb_arg);
    6006           8 : }
    6007             : 
    6008             : static void
    6009          11 : bdev_compare_do_read_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6010             : {
    6011          11 :         struct spdk_bdev_io *parent_io = cb_arg;
    6012          11 :         struct spdk_bdev *bdev = parent_io->bdev;
    6013          11 :         uint8_t *read_buf = bdev_io->u.bdev.iovs[0].iov_base;
    6014          11 :         int i, rc = 0;
    6015             : 
    6016          11 :         if (!success) {
    6017           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    6018           0 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
    6019           0 :                 spdk_bdev_free_io(bdev_io);
    6020           0 :                 return;
    6021             :         }
    6022             : 
    6023          17 :         for (i = 0; i < parent_io->u.bdev.iovcnt; i++) {
    6024          22 :                 rc = memcmp(read_buf,
    6025          11 :                             parent_io->u.bdev.iovs[i].iov_base,
    6026          11 :                             parent_io->u.bdev.iovs[i].iov_len);
    6027          11 :                 if (rc) {
    6028           5 :                         break;
    6029             :                 }
    6030           6 :                 read_buf += parent_io->u.bdev.iovs[i].iov_len;
    6031           6 :         }
    6032             : 
    6033          11 :         if (rc == 0 && parent_io->u.bdev.md_buf && spdk_bdev_is_md_separate(bdev)) {
    6034           4 :                 rc = memcmp(bdev_io->u.bdev.md_buf,
    6035           2 :                             parent_io->u.bdev.md_buf,
    6036           2 :                             spdk_bdev_get_md_size(bdev));
    6037           2 :         }
    6038             : 
    6039          11 :         spdk_bdev_free_io(bdev_io);
    6040             : 
    6041          11 :         if (rc == 0) {
    6042           5 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    6043           5 :                 parent_io->internal.cb(parent_io, true, parent_io->internal.caller_ctx);
    6044           5 :         } else {
    6045           6 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_MISCOMPARE;
    6046           6 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
    6047             :         }
    6048          11 : }
    6049             : 
    6050             : static void
    6051          11 : bdev_compare_do_read(void *_bdev_io)
    6052             : {
    6053          11 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6054             :         int rc;
    6055             : 
    6056          22 :         rc = spdk_bdev_read_blocks(bdev_io->internal.desc,
    6057          11 :                                    spdk_io_channel_from_ctx(bdev_io->internal.ch), NULL,
    6058          11 :                                    bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6059          11 :                                    bdev_compare_do_read_done, bdev_io);
    6060             : 
    6061          11 :         if (rc == -ENOMEM) {
    6062           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_do_read);
    6063          11 :         } else if (rc != 0) {
    6064           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    6065           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    6066           0 :         }
    6067          11 : }
    6068             : 
    6069             : static int
    6070          16 : bdev_comparev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6071             :                              struct iovec *iov, int iovcnt, void *md_buf,
    6072             :                              uint64_t offset_blocks, uint64_t num_blocks,
    6073             :                              spdk_bdev_io_completion_cb cb, void *cb_arg)
    6074             : {
    6075          16 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6076             :         struct spdk_bdev_io *bdev_io;
    6077          16 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6078             : 
    6079          16 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6080           0 :                 return -EINVAL;
    6081             :         }
    6082             : 
    6083          16 :         bdev_io = bdev_channel_get_io(channel);
    6084          16 :         if (!bdev_io) {
    6085           0 :                 return -ENOMEM;
    6086             :         }
    6087             : 
    6088          16 :         bdev_io->internal.ch = channel;
    6089          16 :         bdev_io->internal.desc = desc;
    6090          16 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE;
    6091          16 :         bdev_io->u.bdev.iovs = iov;
    6092          16 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6093          16 :         bdev_io->u.bdev.md_buf = md_buf;
    6094          16 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6095          16 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6096          16 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6097          16 :         bdev_io->u.bdev.memory_domain = NULL;
    6098          16 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6099          16 :         bdev_io->u.bdev.accel_sequence = NULL;
    6100             : 
    6101          16 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)) {
    6102           7 :                 bdev_io_submit(bdev_io);
    6103           7 :                 return 0;
    6104             :         }
    6105             : 
    6106           9 :         bdev_compare_do_read(bdev_io);
    6107             : 
    6108           9 :         return 0;
    6109          16 : }
    6110             : 
    6111             : int
    6112          10 : spdk_bdev_comparev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6113             :                           struct iovec *iov, int iovcnt,
    6114             :                           uint64_t offset_blocks, uint64_t num_blocks,
    6115             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    6116             : {
    6117          20 :         return bdev_comparev_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    6118          10 :                                             num_blocks, cb, cb_arg);
    6119             : }
    6120             : 
    6121             : int
    6122           6 : spdk_bdev_comparev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6123             :                                   struct iovec *iov, int iovcnt, void *md_buf,
    6124             :                                   uint64_t offset_blocks, uint64_t num_blocks,
    6125             :                                   spdk_bdev_io_completion_cb cb, void *cb_arg)
    6126             : {
    6127           6 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6128           0 :                 return -EINVAL;
    6129             :         }
    6130             : 
    6131           6 :         if (md_buf && !_is_buf_allocated(iov)) {
    6132           0 :                 return -EINVAL;
    6133             :         }
    6134             : 
    6135          12 :         return bdev_comparev_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    6136           6 :                                             num_blocks, cb, cb_arg);
    6137           6 : }
    6138             : 
    6139             : static int
    6140           4 : bdev_compare_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6141             :                             void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6142             :                             spdk_bdev_io_completion_cb cb, void *cb_arg)
    6143             : {
    6144           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6145             :         struct spdk_bdev_io *bdev_io;
    6146           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6147             : 
    6148           4 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6149           0 :                 return -EINVAL;
    6150             :         }
    6151             : 
    6152           4 :         bdev_io = bdev_channel_get_io(channel);
    6153           4 :         if (!bdev_io) {
    6154           0 :                 return -ENOMEM;
    6155             :         }
    6156             : 
    6157           4 :         bdev_io->internal.ch = channel;
    6158           4 :         bdev_io->internal.desc = desc;
    6159           4 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE;
    6160           4 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    6161           4 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    6162           4 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev_desc_get_block_size(desc);
    6163           4 :         bdev_io->u.bdev.iovcnt = 1;
    6164           4 :         bdev_io->u.bdev.md_buf = md_buf;
    6165           4 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6166           4 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6167           4 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6168           4 :         bdev_io->u.bdev.memory_domain = NULL;
    6169           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6170           4 :         bdev_io->u.bdev.accel_sequence = NULL;
    6171             : 
    6172           4 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)) {
    6173           2 :                 bdev_io_submit(bdev_io);
    6174           2 :                 return 0;
    6175             :         }
    6176             : 
    6177           2 :         bdev_compare_do_read(bdev_io);
    6178             : 
    6179           2 :         return 0;
    6180           4 : }
    6181             : 
    6182             : int
    6183           4 : spdk_bdev_compare_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6184             :                          void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    6185             :                          spdk_bdev_io_completion_cb cb, void *cb_arg)
    6186             : {
    6187           8 :         return bdev_compare_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks,
    6188           4 :                                            cb, cb_arg);
    6189             : }
    6190             : 
    6191             : int
    6192           0 : spdk_bdev_compare_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6193             :                                  void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6194             :                                  spdk_bdev_io_completion_cb cb, void *cb_arg)
    6195             : {
    6196           0 :         struct iovec iov = {
    6197           0 :                 .iov_base = buf,
    6198             :         };
    6199             : 
    6200           0 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6201           0 :                 return -EINVAL;
    6202             :         }
    6203             : 
    6204           0 :         if (md_buf && !_is_buf_allocated(&iov)) {
    6205           0 :                 return -EINVAL;
    6206             :         }
    6207             : 
    6208           0 :         return bdev_compare_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    6209           0 :                                            cb, cb_arg);
    6210           0 : }
    6211             : 
    6212             : static void
    6213           2 : bdev_comparev_and_writev_blocks_unlocked(struct lba_range *range, void *ctx, int unlock_status)
    6214             : {
    6215           2 :         struct spdk_bdev_io *bdev_io = ctx;
    6216             : 
    6217           2 :         if (unlock_status) {
    6218           0 :                 SPDK_ERRLOG("LBA range unlock failed\n");
    6219           0 :         }
    6220             : 
    6221           4 :         bdev_io->internal.cb(bdev_io, bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS ? true :
    6222           2 :                              false, bdev_io->internal.caller_ctx);
    6223           2 : }
    6224             : 
    6225             : static void
    6226           2 : bdev_comparev_and_writev_blocks_unlock(struct spdk_bdev_io *bdev_io, int status)
    6227             : {
    6228           2 :         bdev_io->internal.status = status;
    6229             : 
    6230           4 :         bdev_unlock_lba_range(bdev_io->internal.desc, spdk_io_channel_from_ctx(bdev_io->internal.ch),
    6231           2 :                               bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6232           2 :                               bdev_comparev_and_writev_blocks_unlocked, bdev_io);
    6233           2 : }
    6234             : 
    6235             : static void
    6236           1 : bdev_compare_and_write_do_write_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6237             : {
    6238           1 :         struct spdk_bdev_io *parent_io = cb_arg;
    6239             : 
    6240           1 :         if (!success) {
    6241           0 :                 SPDK_ERRLOG("Compare and write operation failed\n");
    6242           0 :         }
    6243             : 
    6244           1 :         spdk_bdev_free_io(bdev_io);
    6245             : 
    6246           2 :         bdev_comparev_and_writev_blocks_unlock(parent_io,
    6247           1 :                                                success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED);
    6248           1 : }
    6249             : 
    6250             : static void
    6251           1 : bdev_compare_and_write_do_write(void *_bdev_io)
    6252             : {
    6253           1 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6254             :         int rc;
    6255             : 
    6256           2 :         rc = spdk_bdev_writev_blocks(bdev_io->internal.desc,
    6257           1 :                                      spdk_io_channel_from_ctx(bdev_io->internal.ch),
    6258           1 :                                      bdev_io->u.bdev.fused_iovs, bdev_io->u.bdev.fused_iovcnt,
    6259           1 :                                      bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6260           1 :                                      bdev_compare_and_write_do_write_done, bdev_io);
    6261             : 
    6262             : 
    6263           1 :         if (rc == -ENOMEM) {
    6264           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_and_write_do_write);
    6265           1 :         } else if (rc != 0) {
    6266           0 :                 bdev_comparev_and_writev_blocks_unlock(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    6267           0 :         }
    6268           1 : }
    6269             : 
    6270             : static void
    6271           2 : bdev_compare_and_write_do_compare_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6272             : {
    6273           2 :         struct spdk_bdev_io *parent_io = cb_arg;
    6274             : 
    6275           2 :         spdk_bdev_free_io(bdev_io);
    6276             : 
    6277           2 :         if (!success) {
    6278           1 :                 bdev_comparev_and_writev_blocks_unlock(parent_io, SPDK_BDEV_IO_STATUS_MISCOMPARE);
    6279           1 :                 return;
    6280             :         }
    6281             : 
    6282           1 :         bdev_compare_and_write_do_write(parent_io);
    6283           2 : }
    6284             : 
    6285             : static void
    6286           2 : bdev_compare_and_write_do_compare(void *_bdev_io)
    6287             : {
    6288           2 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6289             :         int rc;
    6290             : 
    6291           4 :         rc = spdk_bdev_comparev_blocks(bdev_io->internal.desc,
    6292           2 :                                        spdk_io_channel_from_ctx(bdev_io->internal.ch), bdev_io->u.bdev.iovs,
    6293           2 :                                        bdev_io->u.bdev.iovcnt, bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6294           2 :                                        bdev_compare_and_write_do_compare_done, bdev_io);
    6295             : 
    6296           2 :         if (rc == -ENOMEM) {
    6297           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_and_write_do_compare);
    6298           2 :         } else if (rc != 0) {
    6299           0 :                 bdev_comparev_and_writev_blocks_unlock(bdev_io, SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED);
    6300           0 :         }
    6301           2 : }
    6302             : 
    6303             : static void
    6304           2 : bdev_comparev_and_writev_blocks_locked(struct lba_range *range, void *ctx, int status)
    6305             : {
    6306           2 :         struct spdk_bdev_io *bdev_io = ctx;
    6307             : 
    6308           2 :         if (status) {
    6309           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED;
    6310           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    6311           0 :                 return;
    6312             :         }
    6313             : 
    6314           2 :         bdev_compare_and_write_do_compare(bdev_io);
    6315           2 : }
    6316             : 
    6317             : int
    6318           2 : spdk_bdev_comparev_and_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6319             :                                      struct iovec *compare_iov, int compare_iovcnt,
    6320             :                                      struct iovec *write_iov, int write_iovcnt,
    6321             :                                      uint64_t offset_blocks, uint64_t num_blocks,
    6322             :                                      spdk_bdev_io_completion_cb cb, void *cb_arg)
    6323             : {
    6324           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6325             :         struct spdk_bdev_io *bdev_io;
    6326           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6327             : 
    6328           2 :         if (!desc->write) {
    6329           0 :                 return -EBADF;
    6330             :         }
    6331             : 
    6332           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6333           0 :                 return -EINVAL;
    6334             :         }
    6335             : 
    6336           2 :         if (num_blocks > bdev->acwu) {
    6337           0 :                 return -EINVAL;
    6338             :         }
    6339             : 
    6340           2 :         bdev_io = bdev_channel_get_io(channel);
    6341           2 :         if (!bdev_io) {
    6342           0 :                 return -ENOMEM;
    6343             :         }
    6344             : 
    6345           2 :         bdev_io->internal.ch = channel;
    6346           2 :         bdev_io->internal.desc = desc;
    6347           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE;
    6348           2 :         bdev_io->u.bdev.iovs = compare_iov;
    6349           2 :         bdev_io->u.bdev.iovcnt = compare_iovcnt;
    6350           2 :         bdev_io->u.bdev.fused_iovs = write_iov;
    6351           2 :         bdev_io->u.bdev.fused_iovcnt = write_iovcnt;
    6352           2 :         bdev_io->u.bdev.md_buf = NULL;
    6353           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6354           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6355           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6356           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6357           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6358           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6359             : 
    6360           2 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE)) {
    6361           0 :                 bdev_io_submit(bdev_io);
    6362           0 :                 return 0;
    6363             :         }
    6364             : 
    6365           4 :         return bdev_lock_lba_range(desc, ch, offset_blocks, num_blocks,
    6366           2 :                                    bdev_comparev_and_writev_blocks_locked, bdev_io);
    6367           2 : }
    6368             : 
    6369             : int
    6370           2 : spdk_bdev_zcopy_start(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6371             :                       struct iovec *iov, int iovcnt,
    6372             :                       uint64_t offset_blocks, uint64_t num_blocks,
    6373             :                       bool populate,
    6374             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
    6375             : {
    6376           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6377             :         struct spdk_bdev_io *bdev_io;
    6378           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6379             : 
    6380           2 :         if (!desc->write) {
    6381           0 :                 return -EBADF;
    6382             :         }
    6383             : 
    6384           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6385           0 :                 return -EINVAL;
    6386             :         }
    6387             : 
    6388           2 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ZCOPY)) {
    6389           0 :                 return -ENOTSUP;
    6390             :         }
    6391             : 
    6392           2 :         bdev_io = bdev_channel_get_io(channel);
    6393           2 :         if (!bdev_io) {
    6394           0 :                 return -ENOMEM;
    6395             :         }
    6396             : 
    6397           2 :         bdev_io->internal.ch = channel;
    6398           2 :         bdev_io->internal.desc = desc;
    6399           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ZCOPY;
    6400           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6401           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6402           2 :         bdev_io->u.bdev.iovs = iov;
    6403           2 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6404           2 :         bdev_io->u.bdev.md_buf = NULL;
    6405           2 :         bdev_io->u.bdev.zcopy.populate = populate ? 1 : 0;
    6406           2 :         bdev_io->u.bdev.zcopy.commit = 0;
    6407           2 :         bdev_io->u.bdev.zcopy.start = 1;
    6408           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6409           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6410           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6411           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6412             : 
    6413           2 :         bdev_io_submit(bdev_io);
    6414             : 
    6415           2 :         return 0;
    6416           2 : }
    6417             : 
    6418             : int
    6419           2 : spdk_bdev_zcopy_end(struct spdk_bdev_io *bdev_io, bool commit,
    6420             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    6421             : {
    6422           2 :         if (bdev_io->type != SPDK_BDEV_IO_TYPE_ZCOPY) {
    6423           0 :                 return -EINVAL;
    6424             :         }
    6425             : 
    6426           2 :         bdev_io->u.bdev.zcopy.commit = commit ? 1 : 0;
    6427           2 :         bdev_io->u.bdev.zcopy.start = 0;
    6428           2 :         bdev_io->internal.caller_ctx = cb_arg;
    6429           2 :         bdev_io->internal.cb = cb;
    6430           2 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    6431             : 
    6432           2 :         bdev_io_submit(bdev_io);
    6433             : 
    6434           2 :         return 0;
    6435           2 : }
    6436             : 
    6437             : int
    6438           0 : spdk_bdev_write_zeroes(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6439             :                        uint64_t offset, uint64_t len,
    6440             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6441             : {
    6442             :         uint64_t offset_blocks, num_blocks;
    6443             : 
    6444           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, len, &num_blocks) != 0) {
    6445           0 :                 return -EINVAL;
    6446             :         }
    6447             : 
    6448           0 :         return spdk_bdev_write_zeroes_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6449           0 : }
    6450             : 
    6451             : int
    6452          33 : spdk_bdev_write_zeroes_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6453             :                               uint64_t offset_blocks, uint64_t num_blocks,
    6454             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    6455             : {
    6456          33 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6457             :         struct spdk_bdev_io *bdev_io;
    6458          33 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6459             : 
    6460          33 :         if (!desc->write) {
    6461           0 :                 return -EBADF;
    6462             :         }
    6463             : 
    6464          33 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6465           0 :                 return -EINVAL;
    6466             :         }
    6467             : 
    6468          33 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) &&
    6469          10 :             !bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE)) {
    6470           1 :                 return -ENOTSUP;
    6471             :         }
    6472             : 
    6473          32 :         bdev_io = bdev_channel_get_io(channel);
    6474             : 
    6475          32 :         if (!bdev_io) {
    6476           0 :                 return -ENOMEM;
    6477             :         }
    6478             : 
    6479          32 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE_ZEROES;
    6480          32 :         bdev_io->internal.ch = channel;
    6481          32 :         bdev_io->internal.desc = desc;
    6482          32 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6483          32 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6484          32 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6485          32 :         bdev_io->u.bdev.memory_domain = NULL;
    6486          32 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6487          32 :         bdev_io->u.bdev.accel_sequence = NULL;
    6488             : 
    6489             :         /* If the write_zeroes size is large and should be split, use the generic split
    6490             :          * logic regardless of whether SPDK_BDEV_IO_TYPE_WRITE_ZEREOS is supported or not.
    6491             :          *
    6492             :          * Then, send the write_zeroes request if SPDK_BDEV_IO_TYPE_WRITE_ZEROES is supported
    6493             :          * or emulate it using regular write request otherwise.
    6494             :          */
    6495          32 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) ||
    6496           9 :             bdev_io->internal.f.split) {
    6497          26 :                 bdev_io_submit(bdev_io);
    6498          26 :                 return 0;
    6499             :         }
    6500             : 
    6501           6 :         assert(_bdev_get_block_size_with_md(bdev) <= ZERO_BUFFER_SIZE);
    6502             : 
    6503           6 :         return bdev_write_zero_buffer(bdev_io);
    6504          33 : }
    6505             : 
    6506             : int
    6507           0 : spdk_bdev_unmap(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6508             :                 uint64_t offset, uint64_t nbytes,
    6509             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6510             : {
    6511             :         uint64_t offset_blocks, num_blocks;
    6512             : 
    6513           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    6514           0 :                 return -EINVAL;
    6515             :         }
    6516             : 
    6517           0 :         return spdk_bdev_unmap_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6518           0 : }
    6519             : 
    6520             : static void
    6521           0 : bdev_io_complete_cb(void *ctx)
    6522             : {
    6523           0 :         struct spdk_bdev_io *bdev_io = ctx;
    6524             : 
    6525           0 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    6526           0 :         bdev_io->internal.cb(bdev_io, true, bdev_io->internal.caller_ctx);
    6527           0 : }
    6528             : 
    6529             : int
    6530          22 : spdk_bdev_unmap_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6531             :                        uint64_t offset_blocks, uint64_t num_blocks,
    6532             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6533             : {
    6534          22 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6535             :         struct spdk_bdev_io *bdev_io;
    6536          22 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6537             : 
    6538          22 :         if (!desc->write) {
    6539           0 :                 return -EBADF;
    6540             :         }
    6541             : 
    6542          22 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6543           0 :                 return -EINVAL;
    6544             :         }
    6545             : 
    6546          22 :         bdev_io = bdev_channel_get_io(channel);
    6547          22 :         if (!bdev_io) {
    6548           0 :                 return -ENOMEM;
    6549             :         }
    6550             : 
    6551          22 :         bdev_io->internal.ch = channel;
    6552          22 :         bdev_io->internal.desc = desc;
    6553          22 :         bdev_io->type = SPDK_BDEV_IO_TYPE_UNMAP;
    6554             : 
    6555          22 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    6556          22 :         bdev_io->u.bdev.iovs[0].iov_base = NULL;
    6557          22 :         bdev_io->u.bdev.iovs[0].iov_len = 0;
    6558          22 :         bdev_io->u.bdev.iovcnt = 1;
    6559             : 
    6560          22 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6561          22 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6562          22 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6563          22 :         bdev_io->u.bdev.memory_domain = NULL;
    6564          22 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6565          22 :         bdev_io->u.bdev.accel_sequence = NULL;
    6566             : 
    6567          22 :         if (num_blocks == 0) {
    6568           0 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_io_complete_cb, bdev_io);
    6569           0 :                 return 0;
    6570             :         }
    6571             : 
    6572          22 :         bdev_io_submit(bdev_io);
    6573          22 :         return 0;
    6574          22 : }
    6575             : 
    6576             : int
    6577           0 : spdk_bdev_flush(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6578             :                 uint64_t offset, uint64_t length,
    6579             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6580             : {
    6581             :         uint64_t offset_blocks, num_blocks;
    6582             : 
    6583           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, length, &num_blocks) != 0) {
    6584           0 :                 return -EINVAL;
    6585             :         }
    6586             : 
    6587           0 :         return spdk_bdev_flush_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6588           0 : }
    6589             : 
    6590             : int
    6591           2 : spdk_bdev_flush_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6592             :                        uint64_t offset_blocks, uint64_t num_blocks,
    6593             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6594             : {
    6595           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6596             :         struct spdk_bdev_io *bdev_io;
    6597           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6598             : 
    6599           2 :         if (!desc->write) {
    6600           0 :                 return -EBADF;
    6601             :         }
    6602             : 
    6603           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6604           0 :                 return -EINVAL;
    6605             :         }
    6606             : 
    6607           2 :         bdev_io = bdev_channel_get_io(channel);
    6608           2 :         if (!bdev_io) {
    6609           0 :                 return -ENOMEM;
    6610             :         }
    6611             : 
    6612           2 :         bdev_io->internal.ch = channel;
    6613           2 :         bdev_io->internal.desc = desc;
    6614           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_FLUSH;
    6615           2 :         bdev_io->u.bdev.iovs = NULL;
    6616           2 :         bdev_io->u.bdev.iovcnt = 0;
    6617           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6618           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6619           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6620           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6621           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6622           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6623             : 
    6624           2 :         bdev_io_submit(bdev_io);
    6625           2 :         return 0;
    6626           2 : }
    6627             : 
    6628             : static int bdev_reset_poll_for_outstanding_io(void *ctx);
    6629             : 
    6630             : static void
    6631          13 : bdev_reset_check_outstanding_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6632             : {
    6633          13 :         struct spdk_bdev_channel *ch = _ctx;
    6634             :         struct spdk_bdev_io *bdev_io;
    6635             : 
    6636          13 :         bdev_io = TAILQ_FIRST(&ch->queued_resets);
    6637             : 
    6638          13 :         if (status == -EBUSY) {
    6639           9 :                 if (spdk_get_ticks() < bdev_io->u.reset.wait_poller.stop_time_tsc) {
    6640           8 :                         bdev_io->u.reset.wait_poller.poller = SPDK_POLLER_REGISTER(bdev_reset_poll_for_outstanding_io,
    6641             :                                                               ch, BDEV_RESET_CHECK_OUTSTANDING_IO_PERIOD);
    6642           8 :                 } else {
    6643           1 :                         TAILQ_REMOVE(&ch->queued_resets, bdev_io, internal.link);
    6644             : 
    6645           1 :                         if (TAILQ_EMPTY(&ch->io_memory_domain) && TAILQ_EMPTY(&ch->io_accel_exec)) {
    6646             :                                 /* If outstanding IOs are still present and reset_io_drain_timeout
    6647             :                                  * seconds passed, start the reset. */
    6648           1 :                                 bdev_io_submit_reset(bdev_io);
    6649           1 :                         } else {
    6650             :                                 /* We still have in progress memory domain pull/push or we're
    6651             :                                  * executing accel sequence.  Since we cannot abort either of those
    6652             :                                  * operations, fail the reset request. */
    6653           0 :                                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    6654             :                         }
    6655             :                 }
    6656           9 :         } else {
    6657           4 :                 TAILQ_REMOVE(&ch->queued_resets, bdev_io, internal.link);
    6658           4 :                 SPDK_DEBUGLOG(bdev,
    6659             :                               "Skipping reset for underlying device of bdev: %s - no outstanding I/O.\n",
    6660             :                               ch->bdev->name);
    6661             :                 /* Mark the completion status as a SUCCESS and complete the reset. */
    6662           4 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
    6663             :         }
    6664          13 : }
    6665             : 
    6666             : static void
    6667          13 : bdev_reset_check_outstanding_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6668             :                                 struct spdk_io_channel *io_ch, void *_ctx)
    6669             : {
    6670          13 :         struct spdk_bdev_channel *cur_ch = __io_ch_to_bdev_ch(io_ch);
    6671          13 :         int status = 0;
    6672             : 
    6673          17 :         if (cur_ch->io_outstanding > 0 ||
    6674           4 :             !TAILQ_EMPTY(&cur_ch->io_memory_domain) ||
    6675           4 :             !TAILQ_EMPTY(&cur_ch->io_accel_exec)) {
    6676             :                 /* If a channel has outstanding IO, set status to -EBUSY code. This will stop
    6677             :                  * further iteration over the rest of the channels and pass non-zero status
    6678             :                  * to the callback function. */
    6679           9 :                 status = -EBUSY;
    6680           9 :         }
    6681          13 :         spdk_bdev_for_each_channel_continue(i, status);
    6682          13 : }
    6683             : 
    6684             : static int
    6685           8 : bdev_reset_poll_for_outstanding_io(void *ctx)
    6686             : {
    6687           8 :         struct spdk_bdev_channel *ch = ctx;
    6688             :         struct spdk_bdev_io *bdev_io;
    6689             : 
    6690           8 :         bdev_io = TAILQ_FIRST(&ch->queued_resets);
    6691             : 
    6692           8 :         spdk_poller_unregister(&bdev_io->u.reset.wait_poller.poller);
    6693           8 :         spdk_bdev_for_each_channel(ch->bdev, bdev_reset_check_outstanding_io, ch,
    6694             :                                    bdev_reset_check_outstanding_io_done);
    6695             : 
    6696           8 :         return SPDK_POLLER_BUSY;
    6697             : }
    6698             : 
    6699             : static void
    6700          15 : bdev_reset_freeze_channel_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6701             : {
    6702          15 :         struct spdk_bdev_channel *ch = _ctx;
    6703             :         struct spdk_bdev_io *bdev_io;
    6704             : 
    6705          15 :         bdev_io = TAILQ_FIRST(&ch->queued_resets);
    6706             : 
    6707          15 :         if (bdev->reset_io_drain_timeout == 0) {
    6708          10 :                 TAILQ_REMOVE(&ch->queued_resets, bdev_io, internal.link);
    6709             : 
    6710          10 :                 bdev_io_submit_reset(bdev_io);
    6711          10 :                 return;
    6712             :         }
    6713             : 
    6714          10 :         bdev_io->u.reset.wait_poller.stop_time_tsc = spdk_get_ticks() +
    6715           5 :                         (ch->bdev->reset_io_drain_timeout * spdk_get_ticks_hz());
    6716             : 
    6717             :         /* In case bdev->reset_io_drain_timeout is not equal to zero,
    6718             :          * submit the reset to the underlying module only if outstanding I/O
    6719             :          * remain after reset_io_drain_timeout seconds have passed. */
    6720           5 :         spdk_bdev_for_each_channel(ch->bdev, bdev_reset_check_outstanding_io, ch,
    6721             :                                    bdev_reset_check_outstanding_io_done);
    6722          15 : }
    6723             : 
    6724             : static void
    6725          18 : bdev_reset_freeze_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6726             :                           struct spdk_io_channel *ch, void *_ctx)
    6727             : {
    6728             :         struct spdk_bdev_channel        *channel;
    6729             :         struct spdk_bdev_mgmt_channel   *mgmt_channel;
    6730             :         struct spdk_bdev_shared_resource *shared_resource;
    6731             :         bdev_io_tailq_t                 tmp_queued;
    6732             : 
    6733          18 :         TAILQ_INIT(&tmp_queued);
    6734             : 
    6735          18 :         channel = __io_ch_to_bdev_ch(ch);
    6736          18 :         shared_resource = channel->shared_resource;
    6737          18 :         mgmt_channel = shared_resource->mgmt_ch;
    6738             : 
    6739          18 :         channel->flags |= BDEV_CH_RESET_IN_PROGRESS;
    6740             : 
    6741          18 :         if ((channel->flags & BDEV_CH_QOS_ENABLED) != 0) {
    6742           2 :                 TAILQ_SWAP(&channel->qos_queued_io, &tmp_queued, spdk_bdev_io, internal.link);
    6743           2 :         }
    6744             : 
    6745          18 :         bdev_abort_all_queued_io(&shared_resource->nomem_io, channel);
    6746          18 :         bdev_abort_all_buf_io(mgmt_channel, channel);
    6747          18 :         bdev_abort_all_queued_io(&tmp_queued, channel);
    6748             : 
    6749          18 :         spdk_bdev_for_each_channel_continue(i, 0);
    6750          18 : }
    6751             : 
    6752             : static void
    6753          15 : bdev_start_reset(void *ctx)
    6754             : {
    6755          15 :         struct spdk_bdev_channel *ch = ctx;
    6756             : 
    6757          15 :         spdk_bdev_for_each_channel(ch->bdev, bdev_reset_freeze_channel, ch,
    6758             :                                    bdev_reset_freeze_channel_done);
    6759          15 : }
    6760             : 
    6761             : static void
    6762          16 : bdev_channel_start_reset(struct spdk_bdev_channel *ch)
    6763             : {
    6764          16 :         struct spdk_bdev *bdev = ch->bdev;
    6765             : 
    6766          16 :         assert(!TAILQ_EMPTY(&ch->queued_resets));
    6767             : 
    6768          16 :         spdk_spin_lock(&bdev->internal.spinlock);
    6769          16 :         if (bdev->internal.reset_in_progress == NULL) {
    6770          15 :                 bdev->internal.reset_in_progress = TAILQ_FIRST(&ch->queued_resets);
    6771             :                 /*
    6772             :                  * Take a channel reference for the target bdev for the life of this
    6773             :                  *  reset.  This guards against the channel getting destroyed while
    6774             :                  *  spdk_bdev_for_each_channel() calls related to this reset IO are in
    6775             :                  *  progress.  We will release the reference when this reset is
    6776             :                  *  completed.
    6777             :                  */
    6778          15 :                 bdev->internal.reset_in_progress->u.reset.ch_ref = spdk_get_io_channel(__bdev_to_io_dev(bdev));
    6779          15 :                 bdev_start_reset(ch);
    6780          15 :         }
    6781          16 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6782          16 : }
    6783             : 
    6784             : int
    6785          16 : spdk_bdev_reset(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6786             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6787             : {
    6788          16 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6789             :         struct spdk_bdev_io *bdev_io;
    6790          16 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6791             : 
    6792          16 :         bdev_io = bdev_channel_get_io(channel);
    6793          16 :         if (!bdev_io) {
    6794           0 :                 return -ENOMEM;
    6795             :         }
    6796             : 
    6797          16 :         bdev_io->internal.ch = channel;
    6798          16 :         bdev_io->internal.desc = desc;
    6799          16 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    6800          16 :         bdev_io->type = SPDK_BDEV_IO_TYPE_RESET;
    6801          16 :         bdev_io->u.reset.ch_ref = NULL;
    6802          16 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6803             : 
    6804          16 :         spdk_spin_lock(&bdev->internal.spinlock);
    6805          16 :         TAILQ_INSERT_TAIL(&channel->queued_resets, bdev_io, internal.link);
    6806          16 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6807             : 
    6808          16 :         bdev_ch_add_to_io_submitted(bdev_io);
    6809             : 
    6810          16 :         bdev_channel_start_reset(channel);
    6811             : 
    6812          16 :         return 0;
    6813          16 : }
    6814             : 
    6815             : void
    6816           0 : spdk_bdev_get_io_stat(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
    6817             :                       struct spdk_bdev_io_stat *stat, enum spdk_bdev_reset_stat_mode reset_mode)
    6818             : {
    6819           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6820             : 
    6821           0 :         bdev_get_io_stat(stat, channel->stat);
    6822           0 :         spdk_bdev_reset_io_stat(stat, reset_mode);
    6823           0 : }
    6824             : 
    6825             : static void
    6826           5 : bdev_get_device_stat_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6827             : {
    6828           5 :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx = _ctx;
    6829             : 
    6830          10 :         bdev_iostat_ctx->cb(bdev, bdev_iostat_ctx->stat,
    6831           5 :                             bdev_iostat_ctx->cb_arg, 0);
    6832           5 :         free(bdev_iostat_ctx);
    6833           5 : }
    6834             : 
    6835             : static void
    6836           4 : bdev_get_each_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6837             :                            struct spdk_io_channel *ch, void *_ctx)
    6838             : {
    6839           4 :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx = _ctx;
    6840           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6841             : 
    6842           4 :         spdk_bdev_add_io_stat(bdev_iostat_ctx->stat, channel->stat);
    6843           4 :         spdk_bdev_reset_io_stat(channel->stat, bdev_iostat_ctx->reset_mode);
    6844           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    6845           4 : }
    6846             : 
    6847             : void
    6848           5 : spdk_bdev_get_device_stat(struct spdk_bdev *bdev, struct spdk_bdev_io_stat *stat,
    6849             :                           enum spdk_bdev_reset_stat_mode reset_mode, spdk_bdev_get_device_stat_cb cb, void *cb_arg)
    6850             : {
    6851             :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx;
    6852             : 
    6853           5 :         assert(bdev != NULL);
    6854           5 :         assert(stat != NULL);
    6855           5 :         assert(cb != NULL);
    6856             : 
    6857           5 :         bdev_iostat_ctx = calloc(1, sizeof(struct spdk_bdev_iostat_ctx));
    6858           5 :         if (bdev_iostat_ctx == NULL) {
    6859           0 :                 SPDK_ERRLOG("Unable to allocate memory for spdk_bdev_iostat_ctx\n");
    6860           0 :                 cb(bdev, stat, cb_arg, -ENOMEM);
    6861           0 :                 return;
    6862             :         }
    6863             : 
    6864           5 :         bdev_iostat_ctx->stat = stat;
    6865           5 :         bdev_iostat_ctx->cb = cb;
    6866           5 :         bdev_iostat_ctx->cb_arg = cb_arg;
    6867           5 :         bdev_iostat_ctx->reset_mode = reset_mode;
    6868             : 
    6869             :         /* Start with the statistics from previously deleted channels. */
    6870           5 :         spdk_spin_lock(&bdev->internal.spinlock);
    6871           5 :         bdev_get_io_stat(bdev_iostat_ctx->stat, bdev->internal.stat);
    6872           5 :         spdk_bdev_reset_io_stat(bdev->internal.stat, reset_mode);
    6873           5 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6874             : 
    6875             :         /* Then iterate and add the statistics from each existing channel. */
    6876           5 :         spdk_bdev_for_each_channel(bdev, bdev_get_each_channel_stat, bdev_iostat_ctx,
    6877             :                                    bdev_get_device_stat_done);
    6878           5 : }
    6879             : 
    6880             : struct bdev_iostat_reset_ctx {
    6881             :         enum spdk_bdev_reset_stat_mode mode;
    6882             :         bdev_reset_device_stat_cb cb;
    6883             :         void *cb_arg;
    6884             : };
    6885             : 
    6886             : static void
    6887           0 : bdev_reset_device_stat_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6888             : {
    6889           0 :         struct bdev_iostat_reset_ctx *ctx = _ctx;
    6890             : 
    6891           0 :         ctx->cb(bdev, ctx->cb_arg, 0);
    6892             : 
    6893           0 :         free(ctx);
    6894           0 : }
    6895             : 
    6896             : static void
    6897           0 : bdev_reset_each_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6898             :                              struct spdk_io_channel *ch, void *_ctx)
    6899             : {
    6900           0 :         struct bdev_iostat_reset_ctx *ctx = _ctx;
    6901           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6902             : 
    6903           0 :         spdk_bdev_reset_io_stat(channel->stat, ctx->mode);
    6904             : 
    6905           0 :         spdk_bdev_for_each_channel_continue(i, 0);
    6906           0 : }
    6907             : 
    6908             : void
    6909           0 : bdev_reset_device_stat(struct spdk_bdev *bdev, enum spdk_bdev_reset_stat_mode mode,
    6910             :                        bdev_reset_device_stat_cb cb, void *cb_arg)
    6911             : {
    6912             :         struct bdev_iostat_reset_ctx *ctx;
    6913             : 
    6914           0 :         assert(bdev != NULL);
    6915           0 :         assert(cb != NULL);
    6916             : 
    6917           0 :         ctx = calloc(1, sizeof(*ctx));
    6918           0 :         if (ctx == NULL) {
    6919           0 :                 SPDK_ERRLOG("Unable to allocate bdev_iostat_reset_ctx.\n");
    6920           0 :                 cb(bdev, cb_arg, -ENOMEM);
    6921           0 :                 return;
    6922             :         }
    6923             : 
    6924           0 :         ctx->mode = mode;
    6925           0 :         ctx->cb = cb;
    6926           0 :         ctx->cb_arg = cb_arg;
    6927             : 
    6928           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    6929           0 :         spdk_bdev_reset_io_stat(bdev->internal.stat, mode);
    6930           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6931             : 
    6932           0 :         spdk_bdev_for_each_channel(bdev,
    6933             :                                    bdev_reset_each_channel_stat,
    6934           0 :                                    ctx,
    6935             :                                    bdev_reset_device_stat_done);
    6936           0 : }
    6937             : 
    6938             : int
    6939           1 : spdk_bdev_nvme_admin_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6940             :                               const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
    6941             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    6942             : {
    6943           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6944             :         struct spdk_bdev_io *bdev_io;
    6945           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6946             : 
    6947           1 :         if (!desc->write) {
    6948           0 :                 return -EBADF;
    6949             :         }
    6950             : 
    6951           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_ADMIN))) {
    6952           1 :                 return -ENOTSUP;
    6953             :         }
    6954             : 
    6955           0 :         bdev_io = bdev_channel_get_io(channel);
    6956           0 :         if (!bdev_io) {
    6957           0 :                 return -ENOMEM;
    6958             :         }
    6959             : 
    6960           0 :         bdev_io->internal.ch = channel;
    6961           0 :         bdev_io->internal.desc = desc;
    6962           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_ADMIN;
    6963           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    6964           0 :         bdev_io->u.nvme_passthru.buf = buf;
    6965           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    6966           0 :         bdev_io->u.nvme_passthru.md_buf = NULL;
    6967           0 :         bdev_io->u.nvme_passthru.md_len = 0;
    6968             : 
    6969           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6970             : 
    6971           0 :         bdev_io_submit(bdev_io);
    6972           0 :         return 0;
    6973           1 : }
    6974             : 
    6975             : int
    6976           1 : spdk_bdev_nvme_io_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6977             :                            const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
    6978             :                            spdk_bdev_io_completion_cb cb, void *cb_arg)
    6979             : {
    6980           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6981             :         struct spdk_bdev_io *bdev_io;
    6982           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6983             : 
    6984           1 :         if (!desc->write) {
    6985             :                 /*
    6986             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    6987             :                  *  to easily determine if the command is a read or write, but for now just
    6988             :                  *  do not allow io_passthru with a read-only descriptor.
    6989             :                  */
    6990           0 :                 return -EBADF;
    6991             :         }
    6992             : 
    6993           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO))) {
    6994           1 :                 return -ENOTSUP;
    6995             :         }
    6996             : 
    6997           0 :         bdev_io = bdev_channel_get_io(channel);
    6998           0 :         if (!bdev_io) {
    6999           0 :                 return -ENOMEM;
    7000             :         }
    7001             : 
    7002           0 :         bdev_io->internal.ch = channel;
    7003           0 :         bdev_io->internal.desc = desc;
    7004           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO;
    7005           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7006           0 :         bdev_io->u.nvme_passthru.buf = buf;
    7007           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7008           0 :         bdev_io->u.nvme_passthru.md_buf = NULL;
    7009           0 :         bdev_io->u.nvme_passthru.md_len = 0;
    7010             : 
    7011           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7012             : 
    7013           0 :         bdev_io_submit(bdev_io);
    7014           0 :         return 0;
    7015           1 : }
    7016             : 
    7017             : int
    7018           1 : spdk_bdev_nvme_io_passthru_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7019             :                               const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes, void *md_buf, size_t md_len,
    7020             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    7021             : {
    7022           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7023             :         struct spdk_bdev_io *bdev_io;
    7024           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7025             : 
    7026           1 :         if (!desc->write) {
    7027             :                 /*
    7028             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    7029             :                  *  to easily determine if the command is a read or write, but for now just
    7030             :                  *  do not allow io_passthru with a read-only descriptor.
    7031             :                  */
    7032           0 :                 return -EBADF;
    7033             :         }
    7034             : 
    7035           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO_MD))) {
    7036           1 :                 return -ENOTSUP;
    7037             :         }
    7038             : 
    7039           0 :         bdev_io = bdev_channel_get_io(channel);
    7040           0 :         if (!bdev_io) {
    7041           0 :                 return -ENOMEM;
    7042             :         }
    7043             : 
    7044           0 :         bdev_io->internal.ch = channel;
    7045           0 :         bdev_io->internal.desc = desc;
    7046           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO_MD;
    7047           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7048           0 :         bdev_io->u.nvme_passthru.buf = buf;
    7049           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7050           0 :         bdev_io->u.nvme_passthru.md_buf = md_buf;
    7051           0 :         bdev_io->u.nvme_passthru.md_len = md_len;
    7052             : 
    7053           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7054             : 
    7055           0 :         bdev_io_submit(bdev_io);
    7056           0 :         return 0;
    7057           1 : }
    7058             : 
    7059             : int
    7060           0 : spdk_bdev_nvme_iov_passthru_md(struct spdk_bdev_desc *desc,
    7061             :                                struct spdk_io_channel *ch,
    7062             :                                const struct spdk_nvme_cmd *cmd,
    7063             :                                struct iovec *iov, int iovcnt, size_t nbytes,
    7064             :                                void *md_buf, size_t md_len,
    7065             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    7066             : {
    7067           0 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7068             :         struct spdk_bdev_io *bdev_io;
    7069           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7070             : 
    7071           0 :         if (!desc->write) {
    7072             :                 /*
    7073             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    7074             :                  * to easily determine if the command is a read or write, but for now just
    7075             :                  * do not allow io_passthru with a read-only descriptor.
    7076             :                  */
    7077           0 :                 return -EBADF;
    7078             :         }
    7079             : 
    7080           0 :         if (md_buf && spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO_MD))) {
    7081           0 :                 return -ENOTSUP;
    7082           0 :         } else if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO))) {
    7083           0 :                 return -ENOTSUP;
    7084             :         }
    7085             : 
    7086           0 :         bdev_io = bdev_channel_get_io(channel);
    7087           0 :         if (!bdev_io) {
    7088           0 :                 return -ENOMEM;
    7089             :         }
    7090             : 
    7091           0 :         bdev_io->internal.ch = channel;
    7092           0 :         bdev_io->internal.desc = desc;
    7093           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IOV_MD;
    7094           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7095           0 :         bdev_io->u.nvme_passthru.iovs = iov;
    7096           0 :         bdev_io->u.nvme_passthru.iovcnt = iovcnt;
    7097           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7098           0 :         bdev_io->u.nvme_passthru.md_buf = md_buf;
    7099           0 :         bdev_io->u.nvme_passthru.md_len = md_len;
    7100             : 
    7101           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7102             : 
    7103           0 :         bdev_io_submit(bdev_io);
    7104           0 :         return 0;
    7105           0 : }
    7106             : 
    7107             : static void bdev_abort_retry(void *ctx);
    7108             : static void bdev_abort(struct spdk_bdev_io *parent_io);
    7109             : 
    7110             : static void
    7111          22 : bdev_abort_io_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    7112             : {
    7113          22 :         struct spdk_bdev_channel *channel = bdev_io->internal.ch;
    7114          22 :         struct spdk_bdev_io *parent_io = cb_arg;
    7115             :         struct spdk_bdev_io *bio_to_abort, *tmp_io;
    7116             : 
    7117          22 :         bio_to_abort = bdev_io->u.abort.bio_to_abort;
    7118             : 
    7119          22 :         spdk_bdev_free_io(bdev_io);
    7120             : 
    7121          22 :         if (!success) {
    7122             :                 /* Check if the target I/O completed in the meantime. */
    7123           2 :                 TAILQ_FOREACH(tmp_io, &channel->io_submitted, internal.ch_link) {
    7124           1 :                         if (tmp_io == bio_to_abort) {
    7125           0 :                                 break;
    7126             :                         }
    7127           1 :                 }
    7128             : 
    7129             :                 /* If the target I/O still exists, set the parent to failed. */
    7130           1 :                 if (tmp_io != NULL) {
    7131           0 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7132           0 :                 }
    7133           1 :         }
    7134             : 
    7135          22 :         assert(parent_io->internal.f.split);
    7136             : 
    7137          22 :         parent_io->internal.split.outstanding--;
    7138          22 :         if (parent_io->internal.split.outstanding == 0) {
    7139          16 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7140           0 :                         bdev_abort_retry(parent_io);
    7141           0 :                 } else {
    7142          16 :                         bdev_io_complete(parent_io);
    7143             :                 }
    7144          16 :         }
    7145          22 : }
    7146             : 
    7147             : static int
    7148          23 : bdev_abort_io(struct spdk_bdev_desc *desc, struct spdk_bdev_channel *channel,
    7149             :               struct spdk_bdev_io *bio_to_abort,
    7150             :               spdk_bdev_io_completion_cb cb, void *cb_arg)
    7151             : {
    7152          23 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7153             :         struct spdk_bdev_io *bdev_io;
    7154             : 
    7155          23 :         if (bio_to_abort->type == SPDK_BDEV_IO_TYPE_ABORT ||
    7156          23 :             bio_to_abort->type == SPDK_BDEV_IO_TYPE_RESET) {
    7157             :                 /* TODO: Abort reset or abort request. */
    7158           0 :                 return -ENOTSUP;
    7159             :         }
    7160             : 
    7161          23 :         bdev_io = bdev_channel_get_io(channel);
    7162          23 :         if (bdev_io == NULL) {
    7163           1 :                 return -ENOMEM;
    7164             :         }
    7165             : 
    7166          22 :         bdev_io->internal.ch = channel;
    7167          22 :         bdev_io->internal.desc = desc;
    7168          22 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ABORT;
    7169          22 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7170             : 
    7171          22 :         if (bio_to_abort->internal.f.split) {
    7172           6 :                 assert(bdev_io_should_split(bio_to_abort));
    7173           6 :                 bdev_io->u.bdev.abort.bio_cb_arg = bio_to_abort;
    7174             : 
    7175             :                 /* Parent abort request is not submitted directly, but to manage its
    7176             :                  * execution add it to the submitted list here.
    7177             :                  */
    7178           6 :                 bdev_io->internal.submit_tsc = spdk_get_ticks();
    7179           6 :                 bdev_ch_add_to_io_submitted(bdev_io);
    7180             : 
    7181           6 :                 bdev_abort(bdev_io);
    7182             : 
    7183           6 :                 return 0;
    7184             :         }
    7185             : 
    7186          16 :         bdev_io->u.abort.bio_to_abort = bio_to_abort;
    7187             : 
    7188             :         /* Submit the abort request to the underlying bdev module. */
    7189          16 :         bdev_io_submit(bdev_io);
    7190             : 
    7191          16 :         return 0;
    7192          23 : }
    7193             : 
    7194             : static bool
    7195          46 : bdev_io_on_tailq(struct spdk_bdev_io *bdev_io, bdev_io_tailq_t *tailq)
    7196             : {
    7197             :         struct spdk_bdev_io *iter;
    7198             : 
    7199          46 :         TAILQ_FOREACH(iter, tailq, internal.link) {
    7200           0 :                 if (iter == bdev_io) {
    7201           0 :                         return true;
    7202             :                 }
    7203           0 :         }
    7204             : 
    7205          46 :         return false;
    7206          46 : }
    7207             : 
    7208             : static uint32_t
    7209          18 : _bdev_abort(struct spdk_bdev_io *parent_io)
    7210             : {
    7211          18 :         struct spdk_bdev_desc *desc = parent_io->internal.desc;
    7212          18 :         struct spdk_bdev_channel *channel = parent_io->internal.ch;
    7213             :         void *bio_cb_arg;
    7214             :         struct spdk_bdev_io *bio_to_abort;
    7215             :         uint32_t matched_ios;
    7216             :         int rc;
    7217             : 
    7218          18 :         bio_cb_arg = parent_io->u.bdev.abort.bio_cb_arg;
    7219             : 
    7220             :         /* matched_ios is returned and will be kept by the caller.
    7221             :          *
    7222             :          * This function will be used for two cases, 1) the same cb_arg is used for
    7223             :          * multiple I/Os, 2) a single large I/O is split into smaller ones.
    7224             :          * Incrementing split_outstanding directly here may confuse readers especially
    7225             :          * for the 1st case.
    7226             :          *
    7227             :          * Completion of I/O abort is processed after stack unwinding. Hence this trick
    7228             :          * works as expected.
    7229             :          */
    7230          18 :         matched_ios = 0;
    7231          18 :         parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7232             : 
    7233         105 :         TAILQ_FOREACH(bio_to_abort, &channel->io_submitted, internal.ch_link) {
    7234          88 :                 if (bio_to_abort->internal.caller_ctx != bio_cb_arg) {
    7235          65 :                         continue;
    7236             :                 }
    7237             : 
    7238          23 :                 if (bio_to_abort->internal.submit_tsc > parent_io->internal.submit_tsc) {
    7239             :                         /* Any I/O which was submitted after this abort command should be excluded. */
    7240           0 :                         continue;
    7241             :                 }
    7242             : 
    7243             :                 /* We can't abort a request that's being pushed/pulled or executed by accel */
    7244          23 :                 if (bdev_io_on_tailq(bio_to_abort, &channel->io_accel_exec) ||
    7245          23 :                     bdev_io_on_tailq(bio_to_abort, &channel->io_memory_domain)) {
    7246           0 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7247           0 :                         break;
    7248             :                 }
    7249             : 
    7250          23 :                 rc = bdev_abort_io(desc, channel, bio_to_abort, bdev_abort_io_done, parent_io);
    7251          23 :                 if (rc != 0) {
    7252           1 :                         if (rc == -ENOMEM) {
    7253           1 :                                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_NOMEM;
    7254           1 :                         } else {
    7255           0 :                                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7256             :                         }
    7257           1 :                         break;
    7258             :                 }
    7259          22 :                 matched_ios++;
    7260          22 :         }
    7261             : 
    7262          18 :         return matched_ios;
    7263             : }
    7264             : 
    7265             : static void
    7266           1 : bdev_abort_retry(void *ctx)
    7267             : {
    7268           1 :         struct spdk_bdev_io *parent_io = ctx;
    7269             :         uint32_t matched_ios;
    7270             : 
    7271           1 :         matched_ios = _bdev_abort(parent_io);
    7272             : 
    7273           1 :         if (matched_ios == 0) {
    7274           0 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7275           0 :                         bdev_queue_io_wait_with_cb(parent_io, bdev_abort_retry);
    7276           0 :                 } else {
    7277             :                         /* For retry, the case that no target I/O was found is success
    7278             :                          * because it means target I/Os completed in the meantime.
    7279             :                          */
    7280           0 :                         bdev_io_complete(parent_io);
    7281             :                 }
    7282           0 :                 return;
    7283             :         }
    7284             : 
    7285             :         /* Use split_outstanding to manage the progress of aborting I/Os. */
    7286           1 :         parent_io->internal.f.split = true;
    7287           1 :         parent_io->internal.split.outstanding = matched_ios;
    7288           1 : }
    7289             : 
    7290             : static void
    7291          17 : bdev_abort(struct spdk_bdev_io *parent_io)
    7292             : {
    7293             :         uint32_t matched_ios;
    7294             : 
    7295          17 :         matched_ios = _bdev_abort(parent_io);
    7296             : 
    7297          17 :         if (matched_ios == 0) {
    7298           2 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7299           1 :                         bdev_queue_io_wait_with_cb(parent_io, bdev_abort_retry);
    7300           1 :                 } else {
    7301             :                         /* The case the no target I/O was found is failure. */
    7302           1 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7303           1 :                         bdev_io_complete(parent_io);
    7304             :                 }
    7305           2 :                 return;
    7306             :         }
    7307             : 
    7308             :         /* Use split_outstanding to manage the progress of aborting I/Os. */
    7309          15 :         parent_io->internal.f.split = true;
    7310          15 :         parent_io->internal.split.outstanding = matched_ios;
    7311          17 : }
    7312             : 
    7313             : int
    7314          12 : spdk_bdev_abort(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7315             :                 void *bio_cb_arg,
    7316             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    7317             : {
    7318          12 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7319          12 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7320             :         struct spdk_bdev_io *bdev_io;
    7321             : 
    7322          12 :         if (bio_cb_arg == NULL) {
    7323           0 :                 return -EINVAL;
    7324             :         }
    7325             : 
    7326          12 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ABORT)) {
    7327           1 :                 return -ENOTSUP;
    7328             :         }
    7329             : 
    7330          11 :         bdev_io = bdev_channel_get_io(channel);
    7331          11 :         if (bdev_io == NULL) {
    7332           0 :                 return -ENOMEM;
    7333             :         }
    7334             : 
    7335          11 :         bdev_io->internal.ch = channel;
    7336          11 :         bdev_io->internal.desc = desc;
    7337          11 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    7338          11 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ABORT;
    7339          11 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7340             : 
    7341          11 :         bdev_io->u.bdev.abort.bio_cb_arg = bio_cb_arg;
    7342             : 
    7343             :         /* Parent abort request is not submitted directly, but to manage its execution,
    7344             :          * add it to the submitted list here.
    7345             :          */
    7346          11 :         bdev_ch_add_to_io_submitted(bdev_io);
    7347             : 
    7348          11 :         bdev_abort(bdev_io);
    7349             : 
    7350          11 :         return 0;
    7351          12 : }
    7352             : 
    7353             : int
    7354           4 : spdk_bdev_queue_io_wait(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
    7355             :                         struct spdk_bdev_io_wait_entry *entry)
    7356             : {
    7357           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7358           4 :         struct spdk_bdev_mgmt_channel *mgmt_ch = channel->shared_resource->mgmt_ch;
    7359             : 
    7360           4 :         if (bdev != entry->bdev) {
    7361           0 :                 SPDK_ERRLOG("bdevs do not match\n");
    7362           0 :                 return -EINVAL;
    7363             :         }
    7364             : 
    7365           4 :         if (mgmt_ch->per_thread_cache_count > 0) {
    7366           0 :                 SPDK_ERRLOG("Cannot queue io_wait if spdk_bdev_io available in per-thread cache\n");
    7367           0 :                 return -EINVAL;
    7368             :         }
    7369             : 
    7370           4 :         TAILQ_INSERT_TAIL(&mgmt_ch->io_wait_queue, entry, link);
    7371           4 :         return 0;
    7372           4 : }
    7373             : 
    7374             : static inline void
    7375         610 : bdev_io_update_io_stat(struct spdk_bdev_io *bdev_io, uint64_t tsc_diff)
    7376             : {
    7377         610 :         enum spdk_bdev_io_status io_status = bdev_io->internal.status;
    7378         610 :         struct spdk_bdev_io_stat *io_stat = bdev_io->internal.ch->stat;
    7379         610 :         uint64_t num_blocks = bdev_io->u.bdev.num_blocks;
    7380         610 :         uint32_t blocklen = bdev_io->bdev->blocklen;
    7381             : 
    7382         610 :         if (spdk_likely(io_status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7383         516 :                 switch (bdev_io->type) {
    7384             :                 case SPDK_BDEV_IO_TYPE_READ:
    7385         321 :                         io_stat->bytes_read += num_blocks * blocklen;
    7386         321 :                         io_stat->num_read_ops++;
    7387         321 :                         io_stat->read_latency_ticks += tsc_diff;
    7388         321 :                         if (io_stat->max_read_latency_ticks < tsc_diff) {
    7389           7 :                                 io_stat->max_read_latency_ticks = tsc_diff;
    7390           7 :                         }
    7391         321 :                         if (io_stat->min_read_latency_ticks > tsc_diff) {
    7392          42 :                                 io_stat->min_read_latency_ticks = tsc_diff;
    7393          42 :                         }
    7394         321 :                         break;
    7395             :                 case SPDK_BDEV_IO_TYPE_WRITE:
    7396          75 :                         io_stat->bytes_written += num_blocks * blocklen;
    7397          75 :                         io_stat->num_write_ops++;
    7398          75 :                         io_stat->write_latency_ticks += tsc_diff;
    7399          75 :                         if (io_stat->max_write_latency_ticks < tsc_diff) {
    7400           4 :                                 io_stat->max_write_latency_ticks = tsc_diff;
    7401           4 :                         }
    7402          75 :                         if (io_stat->min_write_latency_ticks > tsc_diff) {
    7403          25 :                                 io_stat->min_write_latency_ticks = tsc_diff;
    7404          25 :                         }
    7405          75 :                         break;
    7406             :                 case SPDK_BDEV_IO_TYPE_UNMAP:
    7407          20 :                         io_stat->bytes_unmapped += num_blocks * blocklen;
    7408          20 :                         io_stat->num_unmap_ops++;
    7409          20 :                         io_stat->unmap_latency_ticks += tsc_diff;
    7410          20 :                         if (io_stat->max_unmap_latency_ticks < tsc_diff) {
    7411           0 :                                 io_stat->max_unmap_latency_ticks = tsc_diff;
    7412           0 :                         }
    7413          20 :                         if (io_stat->min_unmap_latency_ticks > tsc_diff) {
    7414           3 :                                 io_stat->min_unmap_latency_ticks = tsc_diff;
    7415           3 :                         }
    7416          20 :                         break;
    7417             :                 case SPDK_BDEV_IO_TYPE_ZCOPY:
    7418             :                         /* Track the data in the start phase only */
    7419           4 :                         if (bdev_io->u.bdev.zcopy.start) {
    7420           2 :                                 if (bdev_io->u.bdev.zcopy.populate) {
    7421           1 :                                         io_stat->bytes_read += num_blocks * blocklen;
    7422           1 :                                         io_stat->num_read_ops++;
    7423           1 :                                         io_stat->read_latency_ticks += tsc_diff;
    7424           1 :                                         if (io_stat->max_read_latency_ticks < tsc_diff) {
    7425           0 :                                                 io_stat->max_read_latency_ticks = tsc_diff;
    7426           0 :                                         }
    7427           1 :                                         if (io_stat->min_read_latency_ticks > tsc_diff) {
    7428           1 :                                                 io_stat->min_read_latency_ticks = tsc_diff;
    7429           1 :                                         }
    7430           1 :                                 } else {
    7431           1 :                                         io_stat->bytes_written += num_blocks * blocklen;
    7432           1 :                                         io_stat->num_write_ops++;
    7433           1 :                                         io_stat->write_latency_ticks += tsc_diff;
    7434           1 :                                         if (io_stat->max_write_latency_ticks < tsc_diff) {
    7435           0 :                                                 io_stat->max_write_latency_ticks = tsc_diff;
    7436           0 :                                         }
    7437           1 :                                         if (io_stat->min_write_latency_ticks > tsc_diff) {
    7438           1 :                                                 io_stat->min_write_latency_ticks = tsc_diff;
    7439           1 :                                         }
    7440             :                                 }
    7441           2 :                         }
    7442           4 :                         break;
    7443             :                 case SPDK_BDEV_IO_TYPE_COPY:
    7444          21 :                         io_stat->bytes_copied += num_blocks * blocklen;
    7445          21 :                         io_stat->num_copy_ops++;
    7446          21 :                         bdev_io->internal.ch->stat->copy_latency_ticks += tsc_diff;
    7447          21 :                         if (io_stat->max_copy_latency_ticks < tsc_diff) {
    7448           0 :                                 io_stat->max_copy_latency_ticks = tsc_diff;
    7449           0 :                         }
    7450          21 :                         if (io_stat->min_copy_latency_ticks > tsc_diff) {
    7451           4 :                                 io_stat->min_copy_latency_ticks = tsc_diff;
    7452           4 :                         }
    7453          21 :                         break;
    7454             :                 default:
    7455          75 :                         break;
    7456             :                 }
    7457         610 :         } else if (io_status <= SPDK_BDEV_IO_STATUS_FAILED && io_status >= SPDK_MIN_BDEV_IO_STATUS) {
    7458          94 :                 io_stat = bdev_io->bdev->internal.stat;
    7459          94 :                 assert(io_stat->io_error != NULL);
    7460             : 
    7461          94 :                 spdk_spin_lock(&bdev_io->bdev->internal.spinlock);
    7462          94 :                 io_stat->io_error->error_status[-io_status - 1]++;
    7463          94 :                 spdk_spin_unlock(&bdev_io->bdev->internal.spinlock);
    7464          94 :         }
    7465             : 
    7466             : #ifdef SPDK_CONFIG_VTUNE
    7467             :         uint64_t now_tsc = spdk_get_ticks();
    7468             :         if (now_tsc > (bdev_io->internal.ch->start_tsc + bdev_io->internal.ch->interval_tsc)) {
    7469             :                 uint64_t data[5];
    7470             :                 struct spdk_bdev_io_stat *prev_stat = bdev_io->internal.ch->prev_stat;
    7471             : 
    7472             :                 data[0] = io_stat->num_read_ops - prev_stat->num_read_ops;
    7473             :                 data[1] = io_stat->bytes_read - prev_stat->bytes_read;
    7474             :                 data[2] = io_stat->num_write_ops - prev_stat->num_write_ops;
    7475             :                 data[3] = io_stat->bytes_written - prev_stat->bytes_written;
    7476             :                 data[4] = bdev_io->bdev->fn_table->get_spin_time ?
    7477             :                           bdev_io->bdev->fn_table->get_spin_time(spdk_bdev_io_get_io_channel(bdev_io)) : 0;
    7478             : 
    7479             :                 __itt_metadata_add(g_bdev_mgr.domain, __itt_null, bdev_io->internal.ch->handle,
    7480             :                                    __itt_metadata_u64, 5, data);
    7481             : 
    7482             :                 memcpy(prev_stat, io_stat, sizeof(struct spdk_bdev_io_stat));
    7483             :                 bdev_io->internal.ch->start_tsc = now_tsc;
    7484             :         }
    7485             : #endif
    7486         610 : }
    7487             : 
    7488             : static inline void
    7489         610 : _bdev_io_complete(void *ctx)
    7490             : {
    7491         610 :         struct spdk_bdev_io *bdev_io = ctx;
    7492             : 
    7493         610 :         if (spdk_unlikely(bdev_io_use_accel_sequence(bdev_io))) {
    7494           0 :                 assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_SUCCESS);
    7495           0 :                 spdk_accel_sequence_abort(bdev_io->internal.accel_sequence);
    7496           0 :         }
    7497             : 
    7498         610 :         assert(bdev_io->internal.cb != NULL);
    7499         610 :         assert(spdk_get_thread() == spdk_bdev_io_get_thread(bdev_io));
    7500             : 
    7501        1220 :         bdev_io->internal.cb(bdev_io, bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS,
    7502         610 :                              bdev_io->internal.caller_ctx);
    7503         610 : }
    7504             : 
    7505             : static inline void
    7506         618 : bdev_io_complete(void *ctx)
    7507             : {
    7508         618 :         struct spdk_bdev_io *bdev_io = ctx;
    7509         618 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    7510             :         uint64_t tsc, tsc_diff;
    7511             : 
    7512         618 :         if (spdk_unlikely(bdev_io->internal.f.in_submit_request)) {
    7513             :                 /*
    7514             :                  * Defer completion to avoid potential infinite recursion if the
    7515             :                  * user's completion callback issues a new I/O.
    7516             :                  */
    7517          16 :                 spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7518           8 :                                      bdev_io_complete, bdev_io);
    7519           8 :                 return;
    7520             :         }
    7521             : 
    7522         610 :         tsc = spdk_get_ticks();
    7523         610 :         tsc_diff = tsc - bdev_io->internal.submit_tsc;
    7524             : 
    7525         610 :         bdev_ch_remove_from_io_submitted(bdev_io);
    7526         610 :         spdk_trace_record_tsc(tsc, TRACE_BDEV_IO_DONE, bdev_ch->trace_id, 0, (uintptr_t)bdev_io,
    7527             :                               bdev_io->internal.caller_ctx, bdev_ch->queue_depth);
    7528             : 
    7529         610 :         if (bdev_ch->histogram) {
    7530           4 :                 if (bdev_io->bdev->internal.histogram_io_type == 0 ||
    7531           0 :                     bdev_io->bdev->internal.histogram_io_type == bdev_io->type) {
    7532             :                         /*
    7533             :                          * Tally all I/O types if the histogram_io_type is set to 0.
    7534             :                          */
    7535           4 :                         spdk_histogram_data_tally(bdev_ch->histogram, tsc_diff);
    7536           4 :                 }
    7537           4 :         }
    7538             : 
    7539         610 :         bdev_io_update_io_stat(bdev_io, tsc_diff);
    7540         610 :         _bdev_io_complete(bdev_io);
    7541         618 : }
    7542             : 
    7543             : /* The difference between this function and bdev_io_complete() is that this should be called to
    7544             :  * complete IOs that haven't been submitted via bdev_io_submit(), as they weren't added onto the
    7545             :  * io_submitted list and don't have submit_tsc updated.
    7546             :  */
    7547             : static inline void
    7548           0 : bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io)
    7549             : {
    7550             :         /* Since the IO hasn't been submitted it's bound to be failed */
    7551           0 :         assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_SUCCESS);
    7552             : 
    7553             :         /* At this point we don't know if the IO is completed from submission context or not, but,
    7554             :          * since this is an error path, we can always do an spdk_thread_send_msg(). */
    7555           0 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7556           0 :                              _bdev_io_complete, bdev_io);
    7557           0 : }
    7558             : 
    7559             : static void bdev_destroy_cb(void *io_device);
    7560             : 
    7561             : static void
    7562          15 : bdev_reset_complete(struct spdk_bdev *bdev, void *_ctx, int status)
    7563             : {
    7564          15 :         struct spdk_bdev_io *bdev_io = _ctx;
    7565             : 
    7566          15 :         if (bdev_io->u.reset.ch_ref != NULL) {
    7567          15 :                 spdk_put_io_channel(bdev_io->u.reset.ch_ref);
    7568          15 :                 bdev_io->u.reset.ch_ref = NULL;
    7569          15 :         }
    7570             : 
    7571          15 :         bdev_io_complete(bdev_io);
    7572             : 
    7573          15 :         if (bdev->internal.status == SPDK_BDEV_STATUS_REMOVING &&
    7574           1 :             TAILQ_EMPTY(&bdev->internal.open_descs)) {
    7575           1 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    7576           1 :         }
    7577          15 : }
    7578             : 
    7579             : static void
    7580          18 : bdev_unfreeze_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    7581             :                       struct spdk_io_channel *_ch, void *_ctx)
    7582             : {
    7583          18 :         struct spdk_bdev_io *bdev_io = _ctx;
    7584          18 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    7585             :         struct spdk_bdev_io *queued_reset;
    7586             : 
    7587          18 :         ch->flags &= ~BDEV_CH_RESET_IN_PROGRESS;
    7588          18 :         while (!TAILQ_EMPTY(&ch->queued_resets)) {
    7589           0 :                 queued_reset = TAILQ_FIRST(&ch->queued_resets);
    7590           0 :                 TAILQ_REMOVE(&ch->queued_resets, queued_reset, internal.link);
    7591           0 :                 spdk_bdev_io_complete(queued_reset, bdev_io->internal.status);
    7592             :         }
    7593             : 
    7594          18 :         spdk_bdev_for_each_channel_continue(i, 0);
    7595          18 : }
    7596             : 
    7597             : static void
    7598           0 : bdev_io_complete_sequence_cb(void *ctx, int status)
    7599             : {
    7600           0 :         struct spdk_bdev_io *bdev_io = ctx;
    7601             : 
    7602             :         /* u.bdev.accel_sequence should have already been cleared at this point */
    7603           0 :         assert(bdev_io->u.bdev.accel_sequence == NULL);
    7604           0 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    7605           0 :         bdev_io->internal.f.has_accel_sequence = false;
    7606             : 
    7607           0 :         if (spdk_unlikely(status != 0)) {
    7608           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    7609           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7610           0 :         }
    7611             : 
    7612           0 :         bdev_io_complete(bdev_io);
    7613           0 : }
    7614             : 
    7615             : void
    7616         598 : spdk_bdev_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status)
    7617             : {
    7618         598 :         struct spdk_bdev *bdev = bdev_io->bdev;
    7619         598 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    7620         598 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    7621             : 
    7622         598 :         if (spdk_unlikely(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_PENDING)) {
    7623           0 :                 SPDK_ERRLOG("Unexpected completion on IO from %s module, status was %s\n",
    7624             :                             spdk_bdev_get_module_name(bdev),
    7625             :                             bdev_io_status_get_string(bdev_io->internal.status));
    7626           0 :                 assert(false);
    7627             :         }
    7628         598 :         bdev_io->internal.status = status;
    7629             : 
    7630         598 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_RESET)) {
    7631          16 :                 bool unlock_channels = false;
    7632             : 
    7633          16 :                 if (status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7634           0 :                         SPDK_ERRLOG("NOMEM returned for reset\n");
    7635           0 :                 }
    7636          16 :                 spdk_spin_lock(&bdev->internal.spinlock);
    7637          16 :                 if (bdev_io == bdev->internal.reset_in_progress) {
    7638          15 :                         bdev->internal.reset_in_progress = NULL;
    7639          15 :                         unlock_channels = true;
    7640          15 :                 }
    7641          16 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    7642             : 
    7643          16 :                 if (unlock_channels) {
    7644          15 :                         spdk_bdev_for_each_channel(bdev, bdev_unfreeze_channel, bdev_io,
    7645             :                                                    bdev_reset_complete);
    7646          15 :                         return;
    7647             :                 }
    7648           1 :         } else {
    7649         582 :                 bdev_io_decrement_outstanding(bdev_ch, shared_resource);
    7650         582 :                 if (spdk_likely(status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7651         485 :                         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io)) {
    7652           0 :                                 bdev_io_exec_sequence(bdev_io, bdev_io_complete_sequence_cb);
    7653           0 :                                 return;
    7654         485 :                         } else if (spdk_unlikely(bdev_io->internal.f.has_bounce_buf &&
    7655             :                                                  !bdev_io_use_accel_sequence(bdev_io))) {
    7656          26 :                                 _bdev_io_push_bounce_data_buffer(bdev_io,
    7657             :                                                                  _bdev_io_complete_push_bounce_done);
    7658             :                                 /* bdev IO will be completed in the callback */
    7659          26 :                                 return;
    7660             :                         }
    7661         459 :                 }
    7662             : 
    7663         556 :                 if (spdk_unlikely(_bdev_io_handle_no_mem(bdev_io, BDEV_IO_RETRY_STATE_SUBMIT))) {
    7664           5 :                         return;
    7665             :                 }
    7666             :         }
    7667             : 
    7668         552 :         bdev_io_complete(bdev_io);
    7669         598 : }
    7670             : 
    7671             : void
    7672           0 : spdk_bdev_io_complete_scsi_status(struct spdk_bdev_io *bdev_io, enum spdk_scsi_status sc,
    7673             :                                   enum spdk_scsi_sense sk, uint8_t asc, uint8_t ascq)
    7674             : {
    7675             :         enum spdk_bdev_io_status status;
    7676             : 
    7677           0 :         if (sc == SPDK_SCSI_STATUS_GOOD) {
    7678           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7679           0 :         } else {
    7680           0 :                 status = SPDK_BDEV_IO_STATUS_SCSI_ERROR;
    7681           0 :                 bdev_io->internal.error.scsi.sc = sc;
    7682           0 :                 bdev_io->internal.error.scsi.sk = sk;
    7683           0 :                 bdev_io->internal.error.scsi.asc = asc;
    7684           0 :                 bdev_io->internal.error.scsi.ascq = ascq;
    7685             :         }
    7686             : 
    7687           0 :         spdk_bdev_io_complete(bdev_io, status);
    7688           0 : }
    7689             : 
    7690             : void
    7691           0 : spdk_bdev_io_get_scsi_status(const struct spdk_bdev_io *bdev_io,
    7692             :                              int *sc, int *sk, int *asc, int *ascq)
    7693             : {
    7694           0 :         assert(sc != NULL);
    7695           0 :         assert(sk != NULL);
    7696           0 :         assert(asc != NULL);
    7697           0 :         assert(ascq != NULL);
    7698             : 
    7699           0 :         switch (bdev_io->internal.status) {
    7700             :         case SPDK_BDEV_IO_STATUS_SUCCESS:
    7701           0 :                 *sc = SPDK_SCSI_STATUS_GOOD;
    7702           0 :                 *sk = SPDK_SCSI_SENSE_NO_SENSE;
    7703           0 :                 *asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
    7704           0 :                 *ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
    7705           0 :                 break;
    7706             :         case SPDK_BDEV_IO_STATUS_NVME_ERROR:
    7707           0 :                 spdk_scsi_nvme_translate(bdev_io, sc, sk, asc, ascq);
    7708           0 :                 break;
    7709             :         case SPDK_BDEV_IO_STATUS_MISCOMPARE:
    7710           0 :                 *sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
    7711           0 :                 *sk = SPDK_SCSI_SENSE_MISCOMPARE;
    7712           0 :                 *asc = SPDK_SCSI_ASC_MISCOMPARE_DURING_VERIFY_OPERATION;
    7713           0 :                 *ascq = bdev_io->internal.error.scsi.ascq;
    7714           0 :                 break;
    7715             :         case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
    7716           0 :                 *sc = bdev_io->internal.error.scsi.sc;
    7717           0 :                 *sk = bdev_io->internal.error.scsi.sk;
    7718           0 :                 *asc = bdev_io->internal.error.scsi.asc;
    7719           0 :                 *ascq = bdev_io->internal.error.scsi.ascq;
    7720           0 :                 break;
    7721             :         default:
    7722           0 :                 *sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
    7723           0 :                 *sk = SPDK_SCSI_SENSE_ABORTED_COMMAND;
    7724           0 :                 *asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
    7725           0 :                 *ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
    7726           0 :                 break;
    7727             :         }
    7728           0 : }
    7729             : 
    7730             : void
    7731           0 : spdk_bdev_io_complete_aio_status(struct spdk_bdev_io *bdev_io, int aio_result)
    7732             : {
    7733             :         enum spdk_bdev_io_status status;
    7734             : 
    7735           0 :         if (aio_result == 0) {
    7736           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7737           0 :         } else {
    7738           0 :                 status = SPDK_BDEV_IO_STATUS_AIO_ERROR;
    7739             :         }
    7740             : 
    7741           0 :         bdev_io->internal.error.aio_result = aio_result;
    7742             : 
    7743           0 :         spdk_bdev_io_complete(bdev_io, status);
    7744           0 : }
    7745             : 
    7746             : void
    7747           0 : spdk_bdev_io_get_aio_status(const struct spdk_bdev_io *bdev_io, int *aio_result)
    7748             : {
    7749           0 :         assert(aio_result != NULL);
    7750             : 
    7751           0 :         if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_AIO_ERROR) {
    7752           0 :                 *aio_result = bdev_io->internal.error.aio_result;
    7753           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7754           0 :                 *aio_result = 0;
    7755           0 :         } else {
    7756           0 :                 *aio_result = -EIO;
    7757             :         }
    7758           0 : }
    7759             : 
    7760             : void
    7761           0 : spdk_bdev_io_complete_nvme_status(struct spdk_bdev_io *bdev_io, uint32_t cdw0, int sct, int sc)
    7762             : {
    7763             :         enum spdk_bdev_io_status status;
    7764             : 
    7765           0 :         if (spdk_likely(sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_SUCCESS)) {
    7766           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7767           0 :         } else if (sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_ABORTED_BY_REQUEST) {
    7768           0 :                 status = SPDK_BDEV_IO_STATUS_ABORTED;
    7769           0 :         } else {
    7770           0 :                 status = SPDK_BDEV_IO_STATUS_NVME_ERROR;
    7771             :         }
    7772             : 
    7773           0 :         bdev_io->internal.error.nvme.cdw0 = cdw0;
    7774           0 :         bdev_io->internal.error.nvme.sct = sct;
    7775           0 :         bdev_io->internal.error.nvme.sc = sc;
    7776             : 
    7777           0 :         spdk_bdev_io_complete(bdev_io, status);
    7778           0 : }
    7779             : 
    7780             : void
    7781           0 : spdk_bdev_io_get_nvme_status(const struct spdk_bdev_io *bdev_io, uint32_t *cdw0, int *sct, int *sc)
    7782             : {
    7783           0 :         assert(sct != NULL);
    7784           0 :         assert(sc != NULL);
    7785           0 :         assert(cdw0 != NULL);
    7786             : 
    7787           0 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT)) {
    7788           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7789           0 :                 *sc = SPDK_NVME_SC_SUCCESS;
    7790           0 :                 if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7791           0 :                         *cdw0 = 0;
    7792           0 :                 } else {
    7793           0 :                         *cdw0 = 1U;
    7794             :                 }
    7795           0 :                 return;
    7796             :         }
    7797             : 
    7798           0 :         if (spdk_likely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7799           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7800           0 :                 *sc = SPDK_NVME_SC_SUCCESS;
    7801           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
    7802           0 :                 *sct = bdev_io->internal.error.nvme.sct;
    7803           0 :                 *sc = bdev_io->internal.error.nvme.sc;
    7804           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_ABORTED) {
    7805           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7806           0 :                 *sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7807           0 :         } else {
    7808           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7809           0 :                 *sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7810             :         }
    7811             : 
    7812           0 :         *cdw0 = bdev_io->internal.error.nvme.cdw0;
    7813           0 : }
    7814             : 
    7815             : void
    7816           0 : spdk_bdev_io_get_nvme_fused_status(const struct spdk_bdev_io *bdev_io, uint32_t *cdw0,
    7817             :                                    int *first_sct, int *first_sc, int *second_sct, int *second_sc)
    7818             : {
    7819           0 :         assert(first_sct != NULL);
    7820           0 :         assert(first_sc != NULL);
    7821           0 :         assert(second_sct != NULL);
    7822           0 :         assert(second_sc != NULL);
    7823           0 :         assert(cdw0 != NULL);
    7824             : 
    7825           0 :         if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
    7826           0 :                 if (bdev_io->internal.error.nvme.sct == SPDK_NVME_SCT_MEDIA_ERROR &&
    7827           0 :                     bdev_io->internal.error.nvme.sc == SPDK_NVME_SC_COMPARE_FAILURE) {
    7828           0 :                         *first_sct = bdev_io->internal.error.nvme.sct;
    7829           0 :                         *first_sc = bdev_io->internal.error.nvme.sc;
    7830           0 :                         *second_sct = SPDK_NVME_SCT_GENERIC;
    7831           0 :                         *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    7832           0 :                 } else {
    7833           0 :                         *first_sct = SPDK_NVME_SCT_GENERIC;
    7834           0 :                         *first_sc = SPDK_NVME_SC_SUCCESS;
    7835           0 :                         *second_sct = bdev_io->internal.error.nvme.sct;
    7836           0 :                         *second_sc = bdev_io->internal.error.nvme.sc;
    7837             :                 }
    7838           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_ABORTED) {
    7839           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7840           0 :                 *first_sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7841           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7842           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7843           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7844           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7845           0 :                 *first_sc = SPDK_NVME_SC_SUCCESS;
    7846           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7847           0 :                 *second_sc = SPDK_NVME_SC_SUCCESS;
    7848           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED) {
    7849           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7850           0 :                 *first_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7851           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7852           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    7853           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_MISCOMPARE) {
    7854           0 :                 *first_sct = SPDK_NVME_SCT_MEDIA_ERROR;
    7855           0 :                 *first_sc = SPDK_NVME_SC_COMPARE_FAILURE;
    7856           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7857           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    7858           0 :         } else {
    7859           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7860           0 :                 *first_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7861           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7862           0 :                 *second_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7863             :         }
    7864             : 
    7865           0 :         *cdw0 = bdev_io->internal.error.nvme.cdw0;
    7866           0 : }
    7867             : 
    7868             : void
    7869           0 : spdk_bdev_io_complete_base_io_status(struct spdk_bdev_io *bdev_io,
    7870             :                                      const struct spdk_bdev_io *base_io)
    7871             : {
    7872           0 :         switch (base_io->internal.status) {
    7873             :         case SPDK_BDEV_IO_STATUS_NVME_ERROR:
    7874           0 :                 spdk_bdev_io_complete_nvme_status(bdev_io,
    7875           0 :                                                   base_io->internal.error.nvme.cdw0,
    7876           0 :                                                   base_io->internal.error.nvme.sct,
    7877           0 :                                                   base_io->internal.error.nvme.sc);
    7878           0 :                 break;
    7879             :         case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
    7880           0 :                 spdk_bdev_io_complete_scsi_status(bdev_io,
    7881           0 :                                                   base_io->internal.error.scsi.sc,
    7882           0 :                                                   base_io->internal.error.scsi.sk,
    7883           0 :                                                   base_io->internal.error.scsi.asc,
    7884           0 :                                                   base_io->internal.error.scsi.ascq);
    7885           0 :                 break;
    7886             :         case SPDK_BDEV_IO_STATUS_AIO_ERROR:
    7887           0 :                 spdk_bdev_io_complete_aio_status(bdev_io, base_io->internal.error.aio_result);
    7888           0 :                 break;
    7889             :         default:
    7890           0 :                 spdk_bdev_io_complete(bdev_io, base_io->internal.status);
    7891           0 :                 break;
    7892             :         }
    7893           0 : }
    7894             : 
    7895             : struct spdk_thread *
    7896         660 : spdk_bdev_io_get_thread(struct spdk_bdev_io *bdev_io)
    7897             : {
    7898         660 :         return spdk_io_channel_get_thread(bdev_io->internal.ch->channel);
    7899             : }
    7900             : 
    7901             : struct spdk_io_channel *
    7902          70 : spdk_bdev_io_get_io_channel(struct spdk_bdev_io *bdev_io)
    7903             : {
    7904          70 :         return bdev_io->internal.ch->channel;
    7905             : }
    7906             : 
    7907             : static int
    7908         128 : bdev_register(struct spdk_bdev *bdev)
    7909             : {
    7910             :         char *bdev_name;
    7911             :         char uuid[SPDK_UUID_STRING_LEN];
    7912             :         struct spdk_iobuf_opts iobuf_opts;
    7913             :         int ret;
    7914             : 
    7915         128 :         assert(bdev->module != NULL);
    7916             : 
    7917         128 :         if (!bdev->name) {
    7918           0 :                 SPDK_ERRLOG("Bdev name is NULL\n");
    7919           0 :                 return -EINVAL;
    7920             :         }
    7921             : 
    7922         128 :         if (!strlen(bdev->name)) {
    7923           0 :                 SPDK_ERRLOG("Bdev name must not be an empty string\n");
    7924           0 :                 return -EINVAL;
    7925             :         }
    7926             : 
    7927             :         /* Users often register their own I/O devices using the bdev name. In
    7928             :          * order to avoid conflicts, prepend bdev_. */
    7929         128 :         bdev_name = spdk_sprintf_alloc("bdev_%s", bdev->name);
    7930         128 :         if (!bdev_name) {
    7931           0 :                 SPDK_ERRLOG("Unable to allocate memory for internal bdev name.\n");
    7932           0 :                 return -ENOMEM;
    7933             :         }
    7934             : 
    7935         128 :         bdev->internal.stat = bdev_alloc_io_stat(true);
    7936         128 :         if (!bdev->internal.stat) {
    7937           0 :                 SPDK_ERRLOG("Unable to allocate I/O statistics structure.\n");
    7938           0 :                 free(bdev_name);
    7939           0 :                 return -ENOMEM;
    7940             :         }
    7941             : 
    7942         128 :         bdev->internal.status = SPDK_BDEV_STATUS_READY;
    7943         128 :         bdev->internal.measured_queue_depth = UINT64_MAX;
    7944         128 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    7945         128 :         memset(&bdev->internal.claim, 0, sizeof(bdev->internal.claim));
    7946         128 :         bdev->internal.qd_poller = NULL;
    7947         128 :         bdev->internal.qos = NULL;
    7948             : 
    7949         128 :         TAILQ_INIT(&bdev->internal.open_descs);
    7950         128 :         TAILQ_INIT(&bdev->internal.locked_ranges);
    7951         128 :         TAILQ_INIT(&bdev->internal.pending_locked_ranges);
    7952         128 :         TAILQ_INIT(&bdev->aliases);
    7953             : 
    7954             :         /* UUID may be specified by the user or defined by bdev itself.
    7955             :          * Otherwise it will be generated here, so this field will never be empty. */
    7956         128 :         if (spdk_uuid_is_null(&bdev->uuid)) {
    7957          42 :                 spdk_uuid_generate(&bdev->uuid);
    7958          42 :         }
    7959             : 
    7960             :         /* Add the UUID alias only if it's different than the name */
    7961         128 :         spdk_uuid_fmt_lower(uuid, sizeof(uuid), &bdev->uuid);
    7962         128 :         if (strcmp(bdev->name, uuid) != 0) {
    7963         127 :                 ret = spdk_bdev_alias_add(bdev, uuid);
    7964         127 :                 if (ret != 0) {
    7965           2 :                         SPDK_ERRLOG("Unable to add uuid:%s alias for bdev %s\n", uuid, bdev->name);
    7966           2 :                         bdev_free_io_stat(bdev->internal.stat);
    7967           2 :                         free(bdev_name);
    7968           2 :                         return ret;
    7969             :                 }
    7970         125 :         }
    7971             : 
    7972         126 :         spdk_iobuf_get_opts(&iobuf_opts, sizeof(iobuf_opts));
    7973         126 :         if (spdk_bdev_get_buf_align(bdev) > 1) {
    7974           0 :                 bdev->max_rw_size = spdk_min(bdev->max_rw_size ? bdev->max_rw_size : UINT32_MAX,
    7975             :                                              iobuf_opts.large_bufsize / bdev->blocklen);
    7976           0 :         }
    7977             : 
    7978             :         /* If the user didn't specify a write unit size, set it to one. */
    7979         126 :         if (bdev->write_unit_size == 0) {
    7980         122 :                 bdev->write_unit_size = 1;
    7981         122 :         }
    7982             : 
    7983             :         /* Set ACWU value to the write unit size if bdev module did not set it (does not support it natively) */
    7984         126 :         if (bdev->acwu == 0) {
    7985         122 :                 bdev->acwu = bdev->write_unit_size;
    7986         122 :         }
    7987             : 
    7988         126 :         if (bdev->phys_blocklen == 0) {
    7989         122 :                 bdev->phys_blocklen = spdk_bdev_get_data_block_size(bdev);
    7990         122 :         }
    7991             : 
    7992         126 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COPY)) {
    7993           0 :                 bdev->max_copy = bdev_get_max_write(bdev, iobuf_opts.large_bufsize);
    7994           0 :         }
    7995             : 
    7996         126 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES)) {
    7997           0 :                 bdev->max_write_zeroes = bdev_get_max_write(bdev, ZERO_BUFFER_SIZE);
    7998           0 :         }
    7999             : 
    8000         126 :         bdev->internal.reset_in_progress = NULL;
    8001         126 :         bdev->internal.qd_poll_in_progress = false;
    8002         126 :         bdev->internal.period = 0;
    8003         126 :         bdev->internal.new_period = 0;
    8004         126 :         bdev->internal.trace_id = spdk_trace_register_owner(OWNER_TYPE_BDEV, bdev_name);
    8005             : 
    8006             :         /*
    8007             :          * Initialize spinlock before registering IO device because spinlock is used in
    8008             :          * bdev_channel_create
    8009             :          */
    8010         126 :         spdk_spin_init(&bdev->internal.spinlock);
    8011             : 
    8012         252 :         spdk_io_device_register(__bdev_to_io_dev(bdev),
    8013             :                                 bdev_channel_create, bdev_channel_destroy,
    8014             :                                 sizeof(struct spdk_bdev_channel),
    8015         126 :                                 bdev_name);
    8016             : 
    8017             :         /*
    8018             :          * Register bdev name only after the bdev object is ready.
    8019             :          * After bdev_name_add returns, it is possible for other threads to start using the bdev,
    8020             :          * create IO channels...
    8021             :          */
    8022         126 :         ret = bdev_name_add(&bdev->internal.bdev_name, bdev, bdev->name);
    8023         126 :         if (ret != 0) {
    8024           0 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), NULL);
    8025           0 :                 bdev_free_io_stat(bdev->internal.stat);
    8026           0 :                 spdk_spin_destroy(&bdev->internal.spinlock);
    8027           0 :                 free(bdev_name);
    8028           0 :                 return ret;
    8029             :         }
    8030             : 
    8031         126 :         free(bdev_name);
    8032             : 
    8033         126 :         SPDK_DEBUGLOG(bdev, "Inserting bdev %s into list\n", bdev->name);
    8034         126 :         TAILQ_INSERT_TAIL(&g_bdev_mgr.bdevs, bdev, internal.link);
    8035             : 
    8036         126 :         return 0;
    8037         128 : }
    8038             : 
    8039             : static void
    8040         127 : bdev_destroy_cb(void *io_device)
    8041             : {
    8042             :         int                     rc;
    8043             :         struct spdk_bdev        *bdev;
    8044             :         spdk_bdev_unregister_cb cb_fn;
    8045             :         void                    *cb_arg;
    8046             : 
    8047         127 :         bdev = __bdev_from_io_dev(io_device);
    8048             : 
    8049         127 :         if (bdev->internal.unregister_td != spdk_get_thread()) {
    8050           1 :                 spdk_thread_send_msg(bdev->internal.unregister_td, bdev_destroy_cb, io_device);
    8051           1 :                 return;
    8052             :         }
    8053             : 
    8054         126 :         cb_fn = bdev->internal.unregister_cb;
    8055         126 :         cb_arg = bdev->internal.unregister_ctx;
    8056             : 
    8057         126 :         spdk_spin_destroy(&bdev->internal.spinlock);
    8058         126 :         free(bdev->internal.qos);
    8059         126 :         bdev_free_io_stat(bdev->internal.stat);
    8060         126 :         spdk_trace_unregister_owner(bdev->internal.trace_id);
    8061             : 
    8062         126 :         rc = bdev->fn_table->destruct(bdev->ctxt);
    8063         126 :         if (rc < 0) {
    8064           0 :                 SPDK_ERRLOG("destruct failed\n");
    8065           0 :         }
    8066         126 :         if (rc <= 0 && cb_fn != NULL) {
    8067          10 :                 cb_fn(cb_arg, rc);
    8068          10 :         }
    8069         127 : }
    8070             : 
    8071             : void
    8072           2 : spdk_bdev_destruct_done(struct spdk_bdev *bdev, int bdeverrno)
    8073             : {
    8074           2 :         if (bdev->internal.unregister_cb != NULL) {
    8075           0 :                 bdev->internal.unregister_cb(bdev->internal.unregister_ctx, bdeverrno);
    8076           0 :         }
    8077           2 : }
    8078             : 
    8079             : static void
    8080          19 : _remove_notify(void *arg)
    8081             : {
    8082          19 :         struct spdk_bdev_desc *desc = arg;
    8083             : 
    8084          19 :         _event_notify(desc, SPDK_BDEV_EVENT_REMOVE);
    8085          19 : }
    8086             : 
    8087             : /* returns: 0 - bdev removed and ready to be destructed.
    8088             :  *          -EBUSY - bdev can't be destructed yet.  */
    8089             : static int
    8090         141 : bdev_unregister_unsafe(struct spdk_bdev *bdev)
    8091             : {
    8092             :         struct spdk_bdev_desc   *desc, *tmp;
    8093         141 :         int                     rc = 0;
    8094             :         char                    uuid[SPDK_UUID_STRING_LEN];
    8095             : 
    8096         141 :         assert(spdk_spin_held(&g_bdev_mgr.spinlock));
    8097         141 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8098             : 
    8099             :         /* Notify each descriptor about hotremoval */
    8100         160 :         TAILQ_FOREACH_SAFE(desc, &bdev->internal.open_descs, link, tmp) {
    8101          19 :                 rc = -EBUSY;
    8102             :                 /*
    8103             :                  * Defer invocation of the event_cb to a separate message that will
    8104             :                  *  run later on its thread.  This ensures this context unwinds and
    8105             :                  *  we don't recursively unregister this bdev again if the event_cb
    8106             :                  *  immediately closes its descriptor.
    8107             :                  */
    8108          19 :                 event_notify(desc, _remove_notify);
    8109          19 :         }
    8110             : 
    8111             :         /* If there are no descriptors, proceed removing the bdev */
    8112         141 :         if (rc == 0) {
    8113         126 :                 TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, internal.link);
    8114         126 :                 SPDK_DEBUGLOG(bdev, "Removing bdev %s from list done\n", bdev->name);
    8115             : 
    8116             :                 /* Delete the name and the UUID alias */
    8117         126 :                 spdk_uuid_fmt_lower(uuid, sizeof(uuid), &bdev->uuid);
    8118         126 :                 bdev_name_del_unsafe(&bdev->internal.bdev_name);
    8119         126 :                 bdev_alias_del(bdev, uuid, bdev_name_del_unsafe);
    8120             : 
    8121         126 :                 spdk_notify_send("bdev_unregister", spdk_bdev_get_name(bdev));
    8122             : 
    8123         126 :                 if (bdev->internal.reset_in_progress != NULL) {
    8124             :                         /* If reset is in progress, let the completion callback for reset
    8125             :                          * unregister the bdev.
    8126             :                          */
    8127           1 :                         rc = -EBUSY;
    8128           1 :                 }
    8129         126 :         }
    8130             : 
    8131         141 :         return rc;
    8132             : }
    8133             : 
    8134             : static void
    8135           4 : bdev_unregister_abort_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    8136             :                               struct spdk_io_channel *io_ch, void *_ctx)
    8137             : {
    8138           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    8139             : 
    8140           4 :         bdev_channel_abort_queued_ios(bdev_ch);
    8141           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    8142           4 : }
    8143             : 
    8144             : static void
    8145         126 : bdev_unregister(struct spdk_bdev *bdev, void *_ctx, int status)
    8146             : {
    8147             :         int rc;
    8148             : 
    8149         126 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8150         126 :         spdk_spin_lock(&bdev->internal.spinlock);
    8151             :         /*
    8152             :          * Set the status to REMOVING after completing to abort channels. Otherwise,
    8153             :          * the last spdk_bdev_close() may call spdk_io_device_unregister() while
    8154             :          * spdk_bdev_for_each_channel() is executed and spdk_io_device_unregister()
    8155             :          * may fail.
    8156             :          */
    8157         126 :         bdev->internal.status = SPDK_BDEV_STATUS_REMOVING;
    8158         126 :         rc = bdev_unregister_unsafe(bdev);
    8159         126 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8160         126 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8161             : 
    8162         126 :         if (rc == 0) {
    8163         110 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    8164         110 :         }
    8165         126 : }
    8166             : 
    8167             : void
    8168         133 : spdk_bdev_unregister(struct spdk_bdev *bdev, spdk_bdev_unregister_cb cb_fn, void *cb_arg)
    8169             : {
    8170             :         struct spdk_thread      *thread;
    8171             : 
    8172         133 :         SPDK_DEBUGLOG(bdev, "Removing bdev %s from list\n", bdev->name);
    8173             : 
    8174         133 :         thread = spdk_get_thread();
    8175         133 :         if (!thread) {
    8176             :                 /* The user called this from a non-SPDK thread. */
    8177           0 :                 if (cb_fn != NULL) {
    8178           0 :                         cb_fn(cb_arg, -ENOTSUP);
    8179           0 :                 }
    8180           0 :                 return;
    8181             :         }
    8182             : 
    8183         133 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8184         133 :         if (bdev->internal.status == SPDK_BDEV_STATUS_UNREGISTERING ||
    8185         133 :             bdev->internal.status == SPDK_BDEV_STATUS_REMOVING) {
    8186           7 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8187           7 :                 if (cb_fn) {
    8188           0 :                         cb_fn(cb_arg, -EBUSY);
    8189           0 :                 }
    8190           7 :                 return;
    8191             :         }
    8192             : 
    8193         126 :         spdk_spin_lock(&bdev->internal.spinlock);
    8194         126 :         bdev->internal.status = SPDK_BDEV_STATUS_UNREGISTERING;
    8195         126 :         bdev->internal.unregister_cb = cb_fn;
    8196         126 :         bdev->internal.unregister_ctx = cb_arg;
    8197         126 :         bdev->internal.unregister_td = thread;
    8198         126 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8199         126 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8200             : 
    8201         126 :         spdk_bdev_set_qd_sampling_period(bdev, 0);
    8202             : 
    8203         126 :         spdk_bdev_for_each_channel(bdev, bdev_unregister_abort_channel, bdev,
    8204             :                                    bdev_unregister);
    8205         133 : }
    8206             : 
    8207             : int
    8208           4 : spdk_bdev_unregister_by_name(const char *bdev_name, struct spdk_bdev_module *module,
    8209             :                              spdk_bdev_unregister_cb cb_fn, void *cb_arg)
    8210             : {
    8211             :         struct spdk_bdev_desc *desc;
    8212             :         struct spdk_bdev *bdev;
    8213             :         int rc;
    8214             : 
    8215           4 :         rc = spdk_bdev_open_ext(bdev_name, false, _tmp_bdev_event_cb, NULL, &desc);
    8216           4 :         if (rc != 0) {
    8217           1 :                 SPDK_ERRLOG("Failed to open bdev with name: %s\n", bdev_name);
    8218           1 :                 return rc;
    8219             :         }
    8220             : 
    8221           3 :         bdev = spdk_bdev_desc_get_bdev(desc);
    8222             : 
    8223           3 :         if (bdev->module != module) {
    8224           1 :                 spdk_bdev_close(desc);
    8225           1 :                 SPDK_ERRLOG("Bdev %s was not registered by the specified module.\n",
    8226             :                             bdev_name);
    8227           1 :                 return -ENODEV;
    8228             :         }
    8229             : 
    8230           2 :         spdk_bdev_unregister(bdev, cb_fn, cb_arg);
    8231             : 
    8232           2 :         spdk_bdev_close(desc);
    8233             : 
    8234           2 :         return 0;
    8235           4 : }
    8236             : 
    8237             : static int
    8238         259 : bdev_start_qos(struct spdk_bdev *bdev)
    8239             : {
    8240             :         struct set_qos_limit_ctx *ctx;
    8241             : 
    8242             :         /* Enable QoS */
    8243         259 :         if (bdev->internal.qos && bdev->internal.qos->thread == NULL) {
    8244           2 :                 ctx = calloc(1, sizeof(*ctx));
    8245           2 :                 if (ctx == NULL) {
    8246           0 :                         SPDK_ERRLOG("Failed to allocate memory for QoS context\n");
    8247           0 :                         return -ENOMEM;
    8248             :                 }
    8249           2 :                 ctx->bdev = bdev;
    8250           2 :                 spdk_bdev_for_each_channel(bdev, bdev_enable_qos_msg, ctx, bdev_enable_qos_done);
    8251           2 :         }
    8252             : 
    8253         259 :         return 0;
    8254         259 : }
    8255             : 
    8256             : static void
    8257          24 : log_already_claimed(enum spdk_log_level level, const int line, const char *func, const char *detail,
    8258             :                     struct spdk_bdev *bdev)
    8259             : {
    8260             :         enum spdk_bdev_claim_type type;
    8261             :         const char *typename, *modname;
    8262             :         extern struct spdk_log_flag SPDK_LOG_bdev;
    8263             : 
    8264          24 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8265             : 
    8266          24 :         if (level >= SPDK_LOG_INFO && !SPDK_LOG_bdev.enabled) {
    8267           0 :                 return;
    8268             :         }
    8269             : 
    8270          24 :         type = bdev->internal.claim_type;
    8271          24 :         typename = spdk_bdev_claim_get_name(type);
    8272             : 
    8273          24 :         if (type == SPDK_BDEV_CLAIM_EXCL_WRITE) {
    8274           6 :                 modname = bdev->internal.claim.v1.module->name;
    8275          12 :                 spdk_log(level, __FILE__, line, func, "bdev %s %s: type %s by module %s\n",
    8276           6 :                          bdev->name, detail, typename, modname);
    8277           6 :                 return;
    8278             :         }
    8279             : 
    8280          18 :         if (claim_type_is_v2(type)) {
    8281             :                 struct spdk_bdev_module_claim *claim;
    8282             : 
    8283          36 :                 TAILQ_FOREACH(claim, &bdev->internal.claim.v2.claims, link) {
    8284          18 :                         modname = claim->module->name;
    8285          36 :                         spdk_log(level, __FILE__, line, func, "bdev %s %s: type %s by module %s\n",
    8286          18 :                                  bdev->name, detail, typename, modname);
    8287          18 :                 }
    8288          18 :                 return;
    8289             :         }
    8290             : 
    8291           0 :         assert(false);
    8292          24 : }
    8293             : 
    8294             : static int
    8295         268 : bdev_open(struct spdk_bdev *bdev, bool write, struct spdk_bdev_desc *desc)
    8296             : {
    8297             :         struct spdk_thread *thread;
    8298         268 :         int rc = 0;
    8299             : 
    8300         268 :         thread = spdk_get_thread();
    8301         268 :         if (!thread) {
    8302           0 :                 SPDK_ERRLOG("Cannot open bdev from non-SPDK thread.\n");
    8303           0 :                 return -ENOTSUP;
    8304             :         }
    8305             : 
    8306         268 :         SPDK_DEBUGLOG(bdev, "Opening descriptor %p for bdev %s on thread %p\n", desc, bdev->name,
    8307             :                       spdk_get_thread());
    8308             : 
    8309         268 :         desc->bdev = bdev;
    8310         268 :         desc->thread = thread;
    8311         268 :         desc->write = write;
    8312             : 
    8313         268 :         spdk_spin_lock(&bdev->internal.spinlock);
    8314         268 :         if (bdev->internal.status == SPDK_BDEV_STATUS_UNREGISTERING ||
    8315         268 :             bdev->internal.status == SPDK_BDEV_STATUS_REMOVING) {
    8316           3 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8317           3 :                 return -ENODEV;
    8318             :         }
    8319             : 
    8320         265 :         if (write && bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    8321           6 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    8322           6 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8323           6 :                 return -EPERM;
    8324             :         }
    8325             : 
    8326         259 :         rc = bdev_start_qos(bdev);
    8327         259 :         if (rc != 0) {
    8328           0 :                 SPDK_ERRLOG("Failed to start QoS on bdev %s\n", bdev->name);
    8329           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8330           0 :                 return rc;
    8331             :         }
    8332             : 
    8333         259 :         TAILQ_INSERT_TAIL(&bdev->internal.open_descs, desc, link);
    8334             : 
    8335         259 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8336             : 
    8337         259 :         return 0;
    8338         268 : }
    8339             : 
    8340             : static void
    8341         269 : bdev_open_opts_get_defaults(struct spdk_bdev_open_opts *opts, size_t opts_size)
    8342             : {
    8343         269 :         if (!opts) {
    8344           0 :                 SPDK_ERRLOG("opts should not be NULL.\n");
    8345           0 :                 return;
    8346             :         }
    8347             : 
    8348         269 :         if (!opts_size) {
    8349           0 :                 SPDK_ERRLOG("opts_size should not be zero.\n");
    8350           0 :                 return;
    8351             :         }
    8352             : 
    8353         269 :         memset(opts, 0, opts_size);
    8354         269 :         opts->size = opts_size;
    8355             : 
    8356             : #define FIELD_OK(field) \
    8357             :         offsetof(struct spdk_bdev_open_opts, field) + sizeof(opts->field) <= opts_size
    8358             : 
    8359             : #define SET_FIELD(field, value) \
    8360             :         if (FIELD_OK(field)) { \
    8361             :                 opts->field = value; \
    8362             :         } \
    8363             : 
    8364         269 :         SET_FIELD(hide_metadata, false);
    8365             : 
    8366             : #undef FIELD_OK
    8367             : #undef SET_FIELD
    8368         269 : }
    8369             : 
    8370             : static void
    8371           2 : bdev_open_opts_copy(struct spdk_bdev_open_opts *opts,
    8372             :                     const struct spdk_bdev_open_opts *opts_src, size_t opts_size)
    8373             : {
    8374           2 :         assert(opts);
    8375           2 :         assert(opts_src);
    8376             : 
    8377             : #define SET_FIELD(field) \
    8378             :         if (offsetof(struct spdk_bdev_open_opts, field) + sizeof(opts->field) <= opts_size) { \
    8379             :                 opts->field = opts_src->field; \
    8380             :         } \
    8381             : 
    8382           2 :         SET_FIELD(hide_metadata);
    8383             : 
    8384           2 :         opts->size = opts_src->size;
    8385             : 
    8386             :         /* We should not remove this statement, but need to update the assert statement
    8387             :          * if we add a new field, and also add a corresponding SET_FIELD statement.
    8388             :          */
    8389             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_open_opts) == 16, "Incorrect size");
    8390             : 
    8391             : #undef SET_FIELD
    8392           2 : }
    8393             : 
    8394             : void
    8395           1 : spdk_bdev_open_opts_init(struct spdk_bdev_open_opts *opts, size_t opts_size)
    8396             : {
    8397             :         struct spdk_bdev_open_opts opts_local;
    8398             : 
    8399           1 :         bdev_open_opts_get_defaults(&opts_local, sizeof(opts_local));
    8400           1 :         bdev_open_opts_copy(opts, &opts_local, opts_size);
    8401           1 : }
    8402             : 
    8403             : static int
    8404         268 : bdev_desc_alloc(struct spdk_bdev *bdev, spdk_bdev_event_cb_t event_cb, void *event_ctx,
    8405             :                 struct spdk_bdev_open_opts *user_opts, struct spdk_bdev_desc **_desc)
    8406             : {
    8407             :         struct spdk_bdev_desc *desc;
    8408             :         struct spdk_bdev_open_opts opts;
    8409             :         unsigned int i;
    8410             : 
    8411         268 :         bdev_open_opts_get_defaults(&opts, sizeof(opts));
    8412         268 :         if (user_opts != NULL) {
    8413           1 :                 bdev_open_opts_copy(&opts, user_opts, user_opts->size);
    8414           1 :         }
    8415             : 
    8416         268 :         desc = calloc(1, sizeof(*desc));
    8417         268 :         if (desc == NULL) {
    8418           0 :                 SPDK_ERRLOG("Failed to allocate memory for bdev descriptor\n");
    8419           0 :                 return -ENOMEM;
    8420             :         }
    8421             : 
    8422         268 :         desc->opts = opts;
    8423             : 
    8424         268 :         TAILQ_INIT(&desc->pending_media_events);
    8425         268 :         TAILQ_INIT(&desc->free_media_events);
    8426             : 
    8427         268 :         desc->memory_domains_supported = spdk_bdev_get_memory_domains(bdev, NULL, 0) > 0;
    8428         268 :         desc->callback.event_fn = event_cb;
    8429         268 :         desc->callback.ctx = event_ctx;
    8430         268 :         spdk_spin_init(&desc->spinlock);
    8431             : 
    8432         268 :         if (desc->opts.hide_metadata) {
    8433           1 :                 if (spdk_bdev_is_md_separate(bdev)) {
    8434           0 :                         SPDK_ERRLOG("hide_metadata option is not supported with separate metadata.\n");
    8435           0 :                         bdev_desc_free(desc);
    8436           0 :                         return -EINVAL;
    8437             :                 }
    8438           1 :         }
    8439             : 
    8440         268 :         if (bdev->media_events) {
    8441           0 :                 desc->media_events_buffer = calloc(MEDIA_EVENT_POOL_SIZE,
    8442             :                                                    sizeof(*desc->media_events_buffer));
    8443           0 :                 if (desc->media_events_buffer == NULL) {
    8444           0 :                         SPDK_ERRLOG("Failed to initialize media event pool\n");
    8445           0 :                         bdev_desc_free(desc);
    8446           0 :                         return -ENOMEM;
    8447             :                 }
    8448             : 
    8449           0 :                 for (i = 0; i < MEDIA_EVENT_POOL_SIZE; ++i) {
    8450           0 :                         TAILQ_INSERT_TAIL(&desc->free_media_events,
    8451             :                                           &desc->media_events_buffer[i], tailq);
    8452           0 :                 }
    8453           0 :         }
    8454             : 
    8455         268 :         if (bdev->fn_table->accel_sequence_supported != NULL) {
    8456           0 :                 for (i = 0; i < SPDK_BDEV_NUM_IO_TYPES; ++i) {
    8457           0 :                         desc->accel_sequence_supported[i] =
    8458           0 :                                 bdev->fn_table->accel_sequence_supported(bdev->ctxt,
    8459           0 :                                                 (enum spdk_bdev_io_type)i);
    8460           0 :                 }
    8461           0 :         }
    8462             : 
    8463         268 :         *_desc = desc;
    8464             : 
    8465         268 :         return 0;
    8466         268 : }
    8467             : 
    8468             : static int
    8469         130 : bdev_open_ext(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8470             :               void *event_ctx, struct spdk_bdev_open_opts *opts,
    8471             :               struct spdk_bdev_desc **_desc)
    8472             : {
    8473             :         struct spdk_bdev_desc *desc;
    8474             :         struct spdk_bdev *bdev;
    8475             :         int rc;
    8476             : 
    8477         130 :         bdev = bdev_get_by_name(bdev_name);
    8478             : 
    8479         130 :         if (bdev == NULL) {
    8480           1 :                 SPDK_NOTICELOG("Currently unable to find bdev with name: %s\n", bdev_name);
    8481           1 :                 return -ENODEV;
    8482             :         }
    8483             : 
    8484         129 :         rc = bdev_desc_alloc(bdev, event_cb, event_ctx, opts, &desc);
    8485         129 :         if (rc != 0) {
    8486           0 :                 return rc;
    8487             :         }
    8488             : 
    8489         129 :         rc = bdev_open(bdev, write, desc);
    8490         129 :         if (rc != 0) {
    8491           7 :                 bdev_desc_free(desc);
    8492           7 :                 desc = NULL;
    8493           7 :         }
    8494             : 
    8495         129 :         *_desc = desc;
    8496             : 
    8497         129 :         return rc;
    8498         130 : }
    8499             : 
    8500             : int
    8501         132 : spdk_bdev_open_ext_v2(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8502             :                       void *event_ctx, struct spdk_bdev_open_opts *opts,
    8503             :                       struct spdk_bdev_desc **_desc)
    8504             : {
    8505             :         int rc;
    8506             : 
    8507         132 :         if (event_cb == NULL) {
    8508           2 :                 SPDK_ERRLOG("Missing event callback function\n");
    8509           2 :                 return -EINVAL;
    8510             :         }
    8511             : 
    8512         130 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8513         130 :         rc = bdev_open_ext(bdev_name, write, event_cb, event_ctx, opts, _desc);
    8514         130 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8515             : 
    8516         130 :         return rc;
    8517         132 : }
    8518             : 
    8519             : int
    8520         130 : spdk_bdev_open_ext(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8521             :                    void *event_ctx, struct spdk_bdev_desc **_desc)
    8522             : {
    8523         130 :         return spdk_bdev_open_ext_v2(bdev_name, write, event_cb, event_ctx, NULL, _desc);
    8524             : }
    8525             : 
    8526             : struct spdk_bdev_open_async_ctx {
    8527             :         char                                    *bdev_name;
    8528             :         spdk_bdev_event_cb_t                    event_cb;
    8529             :         void                                    *event_ctx;
    8530             :         bool                                    write;
    8531             :         int                                     rc;
    8532             :         spdk_bdev_open_async_cb_t               cb_fn;
    8533             :         void                                    *cb_arg;
    8534             :         struct spdk_bdev_desc                   *desc;
    8535             :         struct spdk_bdev_open_async_opts        opts;
    8536             :         uint64_t                                start_ticks;
    8537             :         struct spdk_thread                      *orig_thread;
    8538             :         struct spdk_poller                      *poller;
    8539             :         TAILQ_ENTRY(spdk_bdev_open_async_ctx)   tailq;
    8540             : };
    8541             : 
    8542             : static void
    8543           0 : bdev_open_async_done(void *arg)
    8544             : {
    8545           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8546             : 
    8547           0 :         ctx->cb_fn(ctx->desc, ctx->rc, ctx->cb_arg);
    8548             : 
    8549           0 :         free(ctx->bdev_name);
    8550           0 :         free(ctx);
    8551           0 : }
    8552             : 
    8553             : static void
    8554           0 : bdev_open_async_cancel(void *arg)
    8555             : {
    8556           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8557             : 
    8558           0 :         assert(ctx->rc == -ESHUTDOWN);
    8559             : 
    8560           0 :         spdk_poller_unregister(&ctx->poller);
    8561             : 
    8562           0 :         bdev_open_async_done(ctx);
    8563           0 : }
    8564             : 
    8565             : /* This is called when the bdev library finishes at shutdown. */
    8566             : static void
    8567          65 : bdev_open_async_fini(void)
    8568             : {
    8569             :         struct spdk_bdev_open_async_ctx *ctx, *tmp_ctx;
    8570             : 
    8571          65 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8572          65 :         TAILQ_FOREACH_SAFE(ctx, &g_bdev_mgr.async_bdev_opens, tailq, tmp_ctx) {
    8573           0 :                 TAILQ_REMOVE(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8574             :                 /*
    8575             :                  * We have to move to ctx->orig_thread to unregister ctx->poller.
    8576             :                  * However, there is a chance that ctx->poller is executed before
    8577             :                  * message is executed, which could result in bdev_open_async_done()
    8578             :                  * being called twice. To avoid such race condition, set ctx->rc to
    8579             :                  * -ESHUTDOWN.
    8580             :                  */
    8581           0 :                 ctx->rc = -ESHUTDOWN;
    8582           0 :                 spdk_thread_send_msg(ctx->orig_thread, bdev_open_async_cancel, ctx);
    8583           0 :         }
    8584          65 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8585          65 : }
    8586             : 
    8587             : static int bdev_open_async(void *arg);
    8588             : 
    8589             : static void
    8590           0 : _bdev_open_async(struct spdk_bdev_open_async_ctx *ctx)
    8591             : {
    8592             :         uint64_t timeout_ticks;
    8593             : 
    8594           0 :         if (ctx->rc == -ESHUTDOWN) {
    8595             :                 /* This context is being canceled. Do nothing. */
    8596           0 :                 return;
    8597             :         }
    8598             : 
    8599           0 :         ctx->rc = bdev_open_ext(ctx->bdev_name, ctx->write, ctx->event_cb, ctx->event_ctx,
    8600           0 :                                 NULL, &ctx->desc);
    8601           0 :         if (ctx->rc == 0 || ctx->opts.timeout_ms == 0) {
    8602           0 :                 goto exit;
    8603             :         }
    8604             : 
    8605           0 :         timeout_ticks = ctx->start_ticks + ctx->opts.timeout_ms * spdk_get_ticks_hz() / 1000ull;
    8606           0 :         if (spdk_get_ticks() >= timeout_ticks) {
    8607           0 :                 SPDK_ERRLOG("Timed out while waiting for bdev '%s' to appear\n", ctx->bdev_name);
    8608           0 :                 ctx->rc = -ETIMEDOUT;
    8609           0 :                 goto exit;
    8610             :         }
    8611             : 
    8612           0 :         return;
    8613             : 
    8614             : exit:
    8615           0 :         spdk_poller_unregister(&ctx->poller);
    8616           0 :         TAILQ_REMOVE(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8617             : 
    8618             :         /* Completion callback is processed after stack unwinding. */
    8619           0 :         spdk_thread_send_msg(ctx->orig_thread, bdev_open_async_done, ctx);
    8620           0 : }
    8621             : 
    8622             : static int
    8623           0 : bdev_open_async(void *arg)
    8624             : {
    8625           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8626             : 
    8627           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8628             : 
    8629           0 :         _bdev_open_async(ctx);
    8630             : 
    8631           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8632             : 
    8633           0 :         return SPDK_POLLER_BUSY;
    8634             : }
    8635             : 
    8636             : static void
    8637           0 : bdev_open_async_opts_copy(struct spdk_bdev_open_async_opts *opts,
    8638             :                           struct spdk_bdev_open_async_opts *opts_src,
    8639             :                           size_t size)
    8640             : {
    8641           0 :         assert(opts);
    8642           0 :         assert(opts_src);
    8643             : 
    8644           0 :         opts->size = size;
    8645             : 
    8646             : #define SET_FIELD(field) \
    8647             :         if (offsetof(struct spdk_bdev_open_async_opts, field) + sizeof(opts->field) <= size) { \
    8648             :                 opts->field = opts_src->field; \
    8649             :         } \
    8650             : 
    8651           0 :         SET_FIELD(timeout_ms);
    8652             : 
    8653             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
    8654             :          * and do not forget to add the SET_FIELD statement for your added field. */
    8655             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_open_async_opts) == 16, "Incorrect size");
    8656             : 
    8657             : #undef SET_FIELD
    8658           0 : }
    8659             : 
    8660             : static void
    8661           0 : bdev_open_async_opts_get_default(struct spdk_bdev_open_async_opts *opts, size_t size)
    8662             : {
    8663           0 :         assert(opts);
    8664             : 
    8665           0 :         opts->size = size;
    8666             : 
    8667             : #define SET_FIELD(field, value) \
    8668             :         if (offsetof(struct spdk_bdev_open_async_opts, field) + sizeof(opts->field) <= size) { \
    8669             :                 opts->field = value; \
    8670             :         } \
    8671             : 
    8672           0 :         SET_FIELD(timeout_ms, 0);
    8673             : 
    8674             : #undef SET_FIELD
    8675           0 : }
    8676             : 
    8677             : int
    8678           0 : spdk_bdev_open_async(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8679             :                      void *event_ctx, struct spdk_bdev_open_async_opts *opts,
    8680             :                      spdk_bdev_open_async_cb_t open_cb, void *open_cb_arg)
    8681             : {
    8682             :         struct spdk_bdev_open_async_ctx *ctx;
    8683             : 
    8684           0 :         if (event_cb == NULL) {
    8685           0 :                 SPDK_ERRLOG("Missing event callback function\n");
    8686           0 :                 return -EINVAL;
    8687             :         }
    8688             : 
    8689           0 :         if (open_cb == NULL) {
    8690           0 :                 SPDK_ERRLOG("Missing open callback function\n");
    8691           0 :                 return -EINVAL;
    8692             :         }
    8693             : 
    8694           0 :         if (opts != NULL && opts->size == 0) {
    8695           0 :                 SPDK_ERRLOG("size in the options structure should not be zero\n");
    8696           0 :                 return -EINVAL;
    8697             :         }
    8698             : 
    8699           0 :         ctx = calloc(1, sizeof(*ctx));
    8700           0 :         if (ctx == NULL) {
    8701           0 :                 SPDK_ERRLOG("Failed to allocate open context\n");
    8702           0 :                 return -ENOMEM;
    8703             :         }
    8704             : 
    8705           0 :         ctx->bdev_name = strdup(bdev_name);
    8706           0 :         if (ctx->bdev_name == NULL) {
    8707           0 :                 SPDK_ERRLOG("Failed to duplicate bdev_name\n");
    8708           0 :                 free(ctx);
    8709           0 :                 return -ENOMEM;
    8710             :         }
    8711             : 
    8712           0 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_open_async, ctx, 100 * 1000);
    8713           0 :         if (ctx->poller == NULL) {
    8714           0 :                 SPDK_ERRLOG("Failed to register bdev_open_async poller\n");
    8715           0 :                 free(ctx->bdev_name);
    8716           0 :                 free(ctx);
    8717           0 :                 return -ENOMEM;
    8718             :         }
    8719             : 
    8720           0 :         ctx->cb_fn = open_cb;
    8721           0 :         ctx->cb_arg = open_cb_arg;
    8722           0 :         ctx->write = write;
    8723           0 :         ctx->event_cb = event_cb;
    8724           0 :         ctx->event_ctx = event_ctx;
    8725           0 :         ctx->orig_thread = spdk_get_thread();
    8726           0 :         ctx->start_ticks = spdk_get_ticks();
    8727             : 
    8728           0 :         bdev_open_async_opts_get_default(&ctx->opts, sizeof(ctx->opts));
    8729           0 :         if (opts != NULL) {
    8730           0 :                 bdev_open_async_opts_copy(&ctx->opts, opts, opts->size);
    8731           0 :         }
    8732             : 
    8733           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8734             : 
    8735           0 :         TAILQ_INSERT_TAIL(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8736           0 :         _bdev_open_async(ctx);
    8737             : 
    8738           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8739             : 
    8740           0 :         return 0;
    8741           0 : }
    8742             : 
    8743             : static void
    8744         259 : bdev_close(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc)
    8745             : {
    8746             :         int rc;
    8747             : 
    8748         259 :         spdk_spin_lock(&bdev->internal.spinlock);
    8749         259 :         spdk_spin_lock(&desc->spinlock);
    8750             : 
    8751         259 :         TAILQ_REMOVE(&bdev->internal.open_descs, desc, link);
    8752             : 
    8753         259 :         desc->closed = true;
    8754             : 
    8755         259 :         if (desc->claim != NULL) {
    8756          16 :                 bdev_desc_release_claims(desc);
    8757          16 :         }
    8758             : 
    8759         259 :         if (0 == desc->refs) {
    8760         248 :                 spdk_spin_unlock(&desc->spinlock);
    8761         248 :                 bdev_desc_free(desc);
    8762         248 :         } else {
    8763          11 :                 spdk_spin_unlock(&desc->spinlock);
    8764             :         }
    8765             : 
    8766             :         /* If no more descriptors, kill QoS channel */
    8767         259 :         if (bdev->internal.qos && TAILQ_EMPTY(&bdev->internal.open_descs)) {
    8768           7 :                 SPDK_DEBUGLOG(bdev, "Closed last descriptor for bdev %s on thread %p. Stopping QoS.\n",
    8769             :                               bdev->name, spdk_get_thread());
    8770             : 
    8771           7 :                 if (bdev_qos_destroy(bdev)) {
    8772             :                         /* There isn't anything we can do to recover here. Just let the
    8773             :                          * old QoS poller keep running. The QoS handling won't change
    8774             :                          * cores when the user allocates a new channel, but it won't break. */
    8775           0 :                         SPDK_ERRLOG("Unable to shut down QoS poller. It will continue running on the current thread.\n");
    8776           0 :                 }
    8777           7 :         }
    8778             : 
    8779         259 :         if (bdev->internal.status == SPDK_BDEV_STATUS_REMOVING && TAILQ_EMPTY(&bdev->internal.open_descs)) {
    8780          15 :                 rc = bdev_unregister_unsafe(bdev);
    8781          15 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8782             : 
    8783          15 :                 if (rc == 0) {
    8784          15 :                         spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    8785          15 :                 }
    8786          15 :         } else {
    8787         244 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8788             :         }
    8789         259 : }
    8790             : 
    8791             : void
    8792         122 : spdk_bdev_close(struct spdk_bdev_desc *desc)
    8793             : {
    8794         122 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    8795             : 
    8796         122 :         SPDK_DEBUGLOG(bdev, "Closing descriptor %p for bdev %s on thread %p\n", desc, bdev->name,
    8797             :                       spdk_get_thread());
    8798             : 
    8799         122 :         assert(desc->thread == spdk_get_thread());
    8800             : 
    8801         122 :         spdk_poller_unregister(&desc->io_timeout_poller);
    8802             : 
    8803         122 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8804             : 
    8805         122 :         bdev_close(bdev, desc);
    8806             : 
    8807         122 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8808         122 : }
    8809             : 
    8810             : int32_t
    8811           3 : spdk_bdev_get_numa_id(struct spdk_bdev *bdev)
    8812             : {
    8813           3 :         if (bdev->numa.id_valid) {
    8814           2 :                 return bdev->numa.id;
    8815             :         } else {
    8816           1 :                 return SPDK_ENV_NUMA_ID_ANY;
    8817             :         }
    8818           3 : }
    8819             : 
    8820             : static void
    8821         126 : bdev_register_finished(void *arg)
    8822             : {
    8823         126 :         struct spdk_bdev_desc *desc = arg;
    8824         126 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    8825             : 
    8826         126 :         spdk_notify_send("bdev_register", spdk_bdev_get_name(bdev));
    8827             : 
    8828         126 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8829             : 
    8830         126 :         bdev_close(bdev, desc);
    8831             : 
    8832         126 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8833         126 : }
    8834             : 
    8835             : int
    8836         129 : spdk_bdev_register(struct spdk_bdev *bdev)
    8837             : {
    8838             :         struct spdk_bdev_desc *desc;
    8839         129 :         struct spdk_thread *thread = spdk_get_thread();
    8840             :         int rc;
    8841             : 
    8842         129 :         if (spdk_unlikely(!spdk_thread_is_app_thread(NULL))) {
    8843           1 :                 SPDK_ERRLOG("Cannot register bdev %s on thread %p (%s)\n", bdev->name, thread,
    8844             :                             thread ? spdk_thread_get_name(thread) : "null");
    8845           1 :                 return -EINVAL;
    8846             :         }
    8847             : 
    8848         128 :         rc = bdev_register(bdev);
    8849         128 :         if (rc != 0) {
    8850           2 :                 return rc;
    8851             :         }
    8852             : 
    8853             :         /* A descriptor is opened to prevent bdev deletion during examination */
    8854         126 :         rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    8855         126 :         if (rc != 0) {
    8856           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    8857           0 :                 return rc;
    8858             :         }
    8859             : 
    8860         126 :         rc = bdev_open(bdev, false, desc);
    8861         126 :         if (rc != 0) {
    8862           0 :                 bdev_desc_free(desc);
    8863           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    8864           0 :                 return rc;
    8865             :         }
    8866             : 
    8867             :         /* Examine configuration before initializing I/O */
    8868         126 :         bdev_examine(bdev);
    8869             : 
    8870         126 :         rc = spdk_bdev_wait_for_examine(bdev_register_finished, desc);
    8871         126 :         if (rc != 0) {
    8872           0 :                 bdev_close(bdev, desc);
    8873           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    8874           0 :         }
    8875             : 
    8876         126 :         return rc;
    8877         129 : }
    8878             : 
    8879             : int
    8880          26 : spdk_bdev_module_claim_bdev(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc,
    8881             :                             struct spdk_bdev_module *module)
    8882             : {
    8883          26 :         spdk_spin_lock(&bdev->internal.spinlock);
    8884             : 
    8885          26 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    8886           6 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    8887           6 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8888           6 :                 return -EPERM;
    8889             :         }
    8890             : 
    8891          20 :         if (desc && !desc->write) {
    8892           5 :                 desc->write = true;
    8893           5 :         }
    8894             : 
    8895          20 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_EXCL_WRITE;
    8896          20 :         bdev->internal.claim.v1.module = module;
    8897             : 
    8898          20 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8899          20 :         return 0;
    8900          26 : }
    8901             : 
    8902             : void
    8903           8 : spdk_bdev_module_release_bdev(struct spdk_bdev *bdev)
    8904             : {
    8905           8 :         spdk_spin_lock(&bdev->internal.spinlock);
    8906             : 
    8907           8 :         assert(bdev->internal.claim.v1.module != NULL);
    8908           8 :         assert(bdev->internal.claim_type == SPDK_BDEV_CLAIM_EXCL_WRITE);
    8909           8 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    8910           8 :         bdev->internal.claim.v1.module = NULL;
    8911             : 
    8912           8 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8913           8 : }
    8914             : 
    8915             : /*
    8916             :  * Start claims v2
    8917             :  */
    8918             : 
    8919             : const char *
    8920          24 : spdk_bdev_claim_get_name(enum spdk_bdev_claim_type type)
    8921             : {
    8922          24 :         switch (type) {
    8923             :         case SPDK_BDEV_CLAIM_NONE:
    8924           0 :                 return "not_claimed";
    8925             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
    8926           6 :                 return "exclusive_write";
    8927             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    8928           7 :                 return "read_many_write_one";
    8929             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    8930           5 :                 return "read_many_write_none";
    8931             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    8932           6 :                 return "read_many_write_many";
    8933             :         default:
    8934           0 :                 break;
    8935             :         }
    8936           0 :         return "invalid_claim";
    8937          24 : }
    8938             : 
    8939             : static bool
    8940          96 : claim_type_is_v2(enum spdk_bdev_claim_type type)
    8941             : {
    8942          96 :         switch (type) {
    8943             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    8944             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    8945             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    8946          96 :                 return true;
    8947             :         default:
    8948           0 :                 break;
    8949             :         }
    8950           0 :         return false;
    8951          96 : }
    8952             : 
    8953             : /* Returns true if taking a claim with desc->write == false should make the descriptor writable. */
    8954             : static bool
    8955          13 : claim_type_promotes_to_write(enum spdk_bdev_claim_type type)
    8956             : {
    8957          13 :         switch (type) {
    8958             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    8959             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    8960           5 :                 return true;
    8961             :         default:
    8962           8 :                 break;
    8963             :         }
    8964           8 :         return false;
    8965          13 : }
    8966             : 
    8967             : void
    8968          44 : spdk_bdev_claim_opts_init(struct spdk_bdev_claim_opts *opts, size_t size)
    8969             : {
    8970          44 :         if (opts == NULL) {
    8971           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
    8972           0 :                 assert(opts != NULL);
    8973           0 :                 return;
    8974             :         }
    8975          44 :         if (size == 0) {
    8976           0 :                 SPDK_ERRLOG("size should not be zero\n");
    8977           0 :                 assert(size != 0);
    8978           0 :                 return;
    8979             :         }
    8980             : 
    8981          44 :         memset(opts, 0, size);
    8982          44 :         opts->opts_size = size;
    8983             : 
    8984             : #define FIELD_OK(field) \
    8985             :         offsetof(struct spdk_bdev_claim_opts, field) + sizeof(opts->field) <= size
    8986             : 
    8987             : #define SET_FIELD(field, value) \
    8988             :         if (FIELD_OK(field)) { \
    8989             :                 opts->field = value; \
    8990             :         } \
    8991             : 
    8992          44 :         SET_FIELD(shared_claim_key, 0);
    8993             : 
    8994             : #undef FIELD_OK
    8995             : #undef SET_FIELD
    8996          44 : }
    8997             : 
    8998             : static int
    8999          22 : claim_opts_copy(struct spdk_bdev_claim_opts *src, struct spdk_bdev_claim_opts *dst)
    9000             : {
    9001          22 :         if (src->opts_size == 0) {
    9002           0 :                 SPDK_ERRLOG("size should not be zero\n");
    9003           0 :                 return -1;
    9004             :         }
    9005             : 
    9006          22 :         memset(dst, 0, sizeof(*dst));
    9007          22 :         dst->opts_size = src->opts_size;
    9008             : 
    9009             : #define FIELD_OK(field) \
    9010             :         offsetof(struct spdk_bdev_claim_opts, field) + sizeof(src->field) <= src->opts_size
    9011             : 
    9012             : #define SET_FIELD(field) \
    9013             :         if (FIELD_OK(field)) { \
    9014             :                 dst->field = src->field; \
    9015             :         } \
    9016             : 
    9017          22 :         if (FIELD_OK(name)) {
    9018          22 :                 snprintf(dst->name, sizeof(dst->name), "%s", src->name);
    9019          22 :         }
    9020             : 
    9021          22 :         SET_FIELD(shared_claim_key);
    9022             : 
    9023             :         /* You should not remove this statement, but need to update the assert statement
    9024             :          * if you add a new field, and also add a corresponding SET_FIELD statement */
    9025             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_claim_opts) == 48, "Incorrect size");
    9026             : 
    9027             : #undef FIELD_OK
    9028             : #undef SET_FIELD
    9029          22 :         return 0;
    9030          22 : }
    9031             : 
    9032             : /* Returns 0 if a read-write-once claim can be taken. */
    9033             : static int
    9034           9 : claim_verify_rwo(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9035             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9036             : {
    9037           9 :         struct spdk_bdev *bdev = desc->bdev;
    9038             :         struct spdk_bdev_desc *open_desc;
    9039             : 
    9040           9 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9041           9 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE);
    9042             : 
    9043           9 :         if (opts->shared_claim_key != 0) {
    9044           1 :                 SPDK_ERRLOG("%s: key option not supported with read-write-once claims\n",
    9045             :                             bdev->name);
    9046           1 :                 return -EINVAL;
    9047             :         }
    9048           8 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    9049           1 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9050           1 :                 return -EPERM;
    9051             :         }
    9052           7 :         if (desc->claim != NULL) {
    9053           0 :                 SPDK_NOTICELOG("%s: descriptor already claimed bdev with module %s\n",
    9054             :                                bdev->name, desc->claim->module->name);
    9055           0 :                 return -EPERM;
    9056             :         }
    9057          14 :         TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9058           9 :                 if (desc != open_desc && open_desc->write) {
    9059           2 :                         SPDK_NOTICELOG("%s: Cannot obtain read-write-once claim while "
    9060             :                                        "another descriptor is open for writing\n",
    9061             :                                        bdev->name);
    9062           2 :                         return -EPERM;
    9063             :                 }
    9064           7 :         }
    9065             : 
    9066           5 :         return 0;
    9067           9 : }
    9068             : 
    9069             : /* Returns 0 if a read-only-many claim can be taken. */
    9070             : static int
    9071          12 : claim_verify_rom(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9072             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9073             : {
    9074          12 :         struct spdk_bdev *bdev = desc->bdev;
    9075             :         struct spdk_bdev_desc *open_desc;
    9076             : 
    9077          12 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9078          12 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE);
    9079          12 :         assert(desc->claim == NULL);
    9080             : 
    9081          12 :         if (desc->write) {
    9082           3 :                 SPDK_ERRLOG("%s: Cannot obtain read-only-many claim with writable descriptor\n",
    9083             :                             bdev->name);
    9084           3 :                 return -EINVAL;
    9085             :         }
    9086           9 :         if (opts->shared_claim_key != 0) {
    9087           1 :                 SPDK_ERRLOG("%s: key option not supported with read-only-may claims\n", bdev->name);
    9088           1 :                 return -EINVAL;
    9089             :         }
    9090           8 :         if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
    9091          15 :                 TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9092           9 :                         if (open_desc->write) {
    9093           0 :                                 SPDK_NOTICELOG("%s: Cannot obtain read-only-many claim while "
    9094             :                                                "another descriptor is open for writing\n",
    9095             :                                                bdev->name);
    9096           0 :                                 return -EPERM;
    9097             :                         }
    9098           9 :                 }
    9099           6 :         }
    9100             : 
    9101           8 :         return 0;
    9102          12 : }
    9103             : 
    9104             : /* Returns 0 if a read-write-many claim can be taken. */
    9105             : static int
    9106           8 : claim_verify_rwm(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9107             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9108             : {
    9109           8 :         struct spdk_bdev *bdev = desc->bdev;
    9110             :         struct spdk_bdev_desc *open_desc;
    9111             : 
    9112           8 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9113           8 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED);
    9114           8 :         assert(desc->claim == NULL);
    9115             : 
    9116           8 :         if (opts->shared_claim_key == 0) {
    9117           2 :                 SPDK_ERRLOG("%s: shared_claim_key option required with read-write-may claims\n",
    9118             :                             bdev->name);
    9119           2 :                 return -EINVAL;
    9120             :         }
    9121           6 :         switch (bdev->internal.claim_type) {
    9122             :         case SPDK_BDEV_CLAIM_NONE:
    9123           7 :                 TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9124           5 :                         if (open_desc == desc) {
    9125           3 :                                 continue;
    9126             :                         }
    9127           2 :                         if (open_desc->write) {
    9128           2 :                                 SPDK_NOTICELOG("%s: Cannot obtain read-write-many claim while "
    9129             :                                                "another descriptor is open for writing without a "
    9130             :                                                "claim\n", bdev->name);
    9131           2 :                                 return -EPERM;
    9132             :                         }
    9133           0 :                 }
    9134           2 :                 break;
    9135             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9136           2 :                 if (opts->shared_claim_key != bdev->internal.claim.v2.key) {
    9137           1 :                         LOG_ALREADY_CLAIMED_ERROR("already claimed with another key", bdev);
    9138           1 :                         return -EPERM;
    9139             :                 }
    9140           1 :                 break;
    9141             :         default:
    9142           0 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9143           0 :                 return -EBUSY;
    9144             :         }
    9145             : 
    9146           3 :         return 0;
    9147           8 : }
    9148             : 
    9149             : /* Updates desc and its bdev with a v2 claim. */
    9150             : static int
    9151          16 : claim_bdev(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9152             :            struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9153             : {
    9154          16 :         struct spdk_bdev *bdev = desc->bdev;
    9155             :         struct spdk_bdev_module_claim *claim;
    9156             : 
    9157          16 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9158          16 :         assert(claim_type_is_v2(type));
    9159          16 :         assert(desc->claim == NULL);
    9160             : 
    9161          16 :         claim = calloc(1, sizeof(*desc->claim));
    9162          16 :         if (claim == NULL) {
    9163           0 :                 SPDK_ERRLOG("%s: out of memory while allocating claim\n", bdev->name);
    9164           0 :                 return -ENOMEM;
    9165             :         }
    9166          16 :         claim->module = module;
    9167          16 :         claim->desc = desc;
    9168             :         SPDK_STATIC_ASSERT(sizeof(claim->name) == sizeof(opts->name), "sizes must match");
    9169          16 :         memcpy(claim->name, opts->name, sizeof(claim->name));
    9170          16 :         desc->claim = claim;
    9171             : 
    9172          16 :         if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
    9173          13 :                 bdev->internal.claim_type = type;
    9174          13 :                 TAILQ_INIT(&bdev->internal.claim.v2.claims);
    9175          13 :                 bdev->internal.claim.v2.key = opts->shared_claim_key;
    9176          13 :         }
    9177          16 :         assert(type == bdev->internal.claim_type);
    9178             : 
    9179          16 :         TAILQ_INSERT_TAIL(&bdev->internal.claim.v2.claims, claim, link);
    9180             : 
    9181          16 :         if (!desc->write && claim_type_promotes_to_write(type)) {
    9182           5 :                 desc->write = true;
    9183           5 :         }
    9184             : 
    9185          16 :         return 0;
    9186          16 : }
    9187             : 
    9188             : int
    9189          39 : spdk_bdev_module_claim_bdev_desc(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9190             :                                  struct spdk_bdev_claim_opts *_opts,
    9191             :                                  struct spdk_bdev_module *module)
    9192             : {
    9193             :         struct spdk_bdev *bdev;
    9194             :         struct spdk_bdev_claim_opts opts;
    9195          39 :         int rc = 0;
    9196             : 
    9197          39 :         if (desc == NULL) {
    9198           0 :                 SPDK_ERRLOG("descriptor must not be NULL\n");
    9199           0 :                 return -EINVAL;
    9200             :         }
    9201             : 
    9202          39 :         bdev = desc->bdev;
    9203             : 
    9204          39 :         if (_opts == NULL) {
    9205          17 :                 spdk_bdev_claim_opts_init(&opts, sizeof(opts));
    9206          39 :         } else if (claim_opts_copy(_opts, &opts) != 0) {
    9207           0 :                 return -EINVAL;
    9208             :         }
    9209             : 
    9210          39 :         spdk_spin_lock(&bdev->internal.spinlock);
    9211             : 
    9212          39 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE &&
    9213          15 :             bdev->internal.claim_type != type) {
    9214          10 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9215          10 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9216          10 :                 return -EPERM;
    9217             :         }
    9218             : 
    9219          29 :         if (claim_type_is_v2(type) && desc->claim != NULL) {
    9220           0 :                 SPDK_ERRLOG("%s: descriptor already has %s claim with name '%s'\n",
    9221             :                             bdev->name, spdk_bdev_claim_get_name(type), desc->claim->name);
    9222           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9223           0 :                 return -EPERM;
    9224             :         }
    9225             : 
    9226          29 :         switch (type) {
    9227             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
    9228           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9229           0 :                 return spdk_bdev_module_claim_bdev(bdev, desc, module);
    9230             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    9231           9 :                 rc = claim_verify_rwo(desc, type, &opts, module);
    9232           9 :                 break;
    9233             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    9234          12 :                 rc = claim_verify_rom(desc, type, &opts, module);
    9235          12 :                 break;
    9236             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9237           8 :                 rc = claim_verify_rwm(desc, type, &opts, module);
    9238           8 :                 break;
    9239             :         default:
    9240           0 :                 SPDK_ERRLOG("%s: claim type %d not supported\n", bdev->name, type);
    9241           0 :                 rc = -ENOTSUP;
    9242           0 :         }
    9243             : 
    9244          29 :         if (rc == 0) {
    9245          16 :                 rc = claim_bdev(desc, type, &opts, module);
    9246          16 :         }
    9247             : 
    9248          29 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9249          29 :         return rc;
    9250          39 : }
    9251             : 
    9252             : static void
    9253          13 : claim_reset(struct spdk_bdev *bdev)
    9254             : {
    9255          13 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9256          13 :         assert(claim_type_is_v2(bdev->internal.claim_type));
    9257          13 :         assert(TAILQ_EMPTY(&bdev->internal.claim.v2.claims));
    9258             : 
    9259          13 :         memset(&bdev->internal.claim, 0, sizeof(bdev->internal.claim));
    9260          13 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    9261          13 : }
    9262             : 
    9263             : static void
    9264          16 : bdev_desc_release_claims(struct spdk_bdev_desc *desc)
    9265             : {
    9266          16 :         struct spdk_bdev *bdev = desc->bdev;
    9267             : 
    9268          16 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9269          16 :         assert(claim_type_is_v2(bdev->internal.claim_type));
    9270             : 
    9271          16 :         if (bdev->internal.examine_in_progress == 0) {
    9272          16 :                 TAILQ_REMOVE(&bdev->internal.claim.v2.claims, desc->claim, link);
    9273          16 :                 free(desc->claim);
    9274          16 :                 if (TAILQ_EMPTY(&bdev->internal.claim.v2.claims)) {
    9275          13 :                         claim_reset(bdev);
    9276          13 :                 }
    9277          16 :         } else {
    9278             :                 /* This is a dead claim that will be cleaned up when bdev_examine() is done. */
    9279           0 :                 desc->claim->module = NULL;
    9280           0 :                 desc->claim->desc = NULL;
    9281             :         }
    9282          16 :         desc->claim = NULL;
    9283          16 : }
    9284             : 
    9285             : /*
    9286             :  * End claims v2
    9287             :  */
    9288             : 
    9289             : struct spdk_bdev *
    9290        1541 : spdk_bdev_desc_get_bdev(struct spdk_bdev_desc *desc)
    9291             : {
    9292        1541 :         assert(desc != NULL);
    9293        1541 :         return desc->bdev;
    9294             : }
    9295             : 
    9296             : int
    9297           1 : spdk_for_each_bdev(void *ctx, spdk_for_each_bdev_fn fn)
    9298             : {
    9299             :         struct spdk_bdev *bdev, *tmp;
    9300             :         struct spdk_bdev_desc *desc;
    9301           1 :         int rc = 0;
    9302             : 
    9303           1 :         assert(fn != NULL);
    9304             : 
    9305           1 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9306           1 :         bdev = spdk_bdev_first();
    9307           9 :         while (bdev != NULL) {
    9308           8 :                 rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9309           8 :                 if (rc != 0) {
    9310           0 :                         break;
    9311             :                 }
    9312           8 :                 rc = bdev_open(bdev, false, desc);
    9313           8 :                 if (rc != 0) {
    9314           1 :                         bdev_desc_free(desc);
    9315           1 :                         if (rc == -ENODEV) {
    9316             :                                 /* Ignore the error and move to the next bdev. */
    9317           1 :                                 rc = 0;
    9318           1 :                                 bdev = spdk_bdev_next(bdev);
    9319           1 :                                 continue;
    9320             :                         }
    9321           0 :                         break;
    9322             :                 }
    9323           7 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9324             : 
    9325           7 :                 rc = fn(ctx, bdev);
    9326             : 
    9327           7 :                 spdk_spin_lock(&g_bdev_mgr.spinlock);
    9328           7 :                 tmp = spdk_bdev_next(bdev);
    9329           7 :                 bdev_close(bdev, desc);
    9330           7 :                 if (rc != 0) {
    9331           0 :                         break;
    9332             :                 }
    9333           7 :                 bdev = tmp;
    9334             :         }
    9335           1 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9336             : 
    9337           1 :         return rc;
    9338             : }
    9339             : 
    9340             : int
    9341           1 : spdk_for_each_bdev_leaf(void *ctx, spdk_for_each_bdev_fn fn)
    9342             : {
    9343             :         struct spdk_bdev *bdev, *tmp;
    9344             :         struct spdk_bdev_desc *desc;
    9345           1 :         int rc = 0;
    9346             : 
    9347           1 :         assert(fn != NULL);
    9348             : 
    9349           1 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9350           1 :         bdev = spdk_bdev_first_leaf();
    9351           6 :         while (bdev != NULL) {
    9352           5 :                 rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9353           5 :                 if (rc != 0) {
    9354           0 :                         break;
    9355             :                 }
    9356           5 :                 rc = bdev_open(bdev, false, desc);
    9357           5 :                 if (rc != 0) {
    9358           1 :                         bdev_desc_free(desc);
    9359           1 :                         if (rc == -ENODEV) {
    9360             :                                 /* Ignore the error and move to the next bdev. */
    9361           1 :                                 rc = 0;
    9362           1 :                                 bdev = spdk_bdev_next_leaf(bdev);
    9363           1 :                                 continue;
    9364             :                         }
    9365           0 :                         break;
    9366             :                 }
    9367           4 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9368             : 
    9369           4 :                 rc = fn(ctx, bdev);
    9370             : 
    9371           4 :                 spdk_spin_lock(&g_bdev_mgr.spinlock);
    9372           4 :                 tmp = spdk_bdev_next_leaf(bdev);
    9373           4 :                 bdev_close(bdev, desc);
    9374           4 :                 if (rc != 0) {
    9375           0 :                         break;
    9376             :                 }
    9377           4 :                 bdev = tmp;
    9378             :         }
    9379           1 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9380             : 
    9381           1 :         return rc;
    9382             : }
    9383             : 
    9384             : void
    9385           0 : spdk_bdev_io_get_iovec(struct spdk_bdev_io *bdev_io, struct iovec **iovp, int *iovcntp)
    9386             : {
    9387             :         struct iovec *iovs;
    9388             :         int iovcnt;
    9389             : 
    9390           0 :         if (bdev_io == NULL) {
    9391           0 :                 return;
    9392             :         }
    9393             : 
    9394           0 :         switch (bdev_io->type) {
    9395             :         case SPDK_BDEV_IO_TYPE_READ:
    9396             :         case SPDK_BDEV_IO_TYPE_WRITE:
    9397             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    9398           0 :                 iovs = bdev_io->u.bdev.iovs;
    9399           0 :                 iovcnt = bdev_io->u.bdev.iovcnt;
    9400           0 :                 break;
    9401             :         default:
    9402           0 :                 iovs = NULL;
    9403           0 :                 iovcnt = 0;
    9404           0 :                 break;
    9405             :         }
    9406             : 
    9407           0 :         if (iovp) {
    9408           0 :                 *iovp = iovs;
    9409           0 :         }
    9410           0 :         if (iovcntp) {
    9411           0 :                 *iovcntp = iovcnt;
    9412           0 :         }
    9413           0 : }
    9414             : 
    9415             : void *
    9416           0 : spdk_bdev_io_get_md_buf(struct spdk_bdev_io *bdev_io)
    9417             : {
    9418           0 :         if (bdev_io == NULL) {
    9419           0 :                 return NULL;
    9420             :         }
    9421             : 
    9422           0 :         if (!spdk_bdev_is_md_separate(bdev_io->bdev)) {
    9423           0 :                 return NULL;
    9424             :         }
    9425             : 
    9426           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ ||
    9427           0 :             bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    9428           0 :                 return bdev_io->u.bdev.md_buf;
    9429             :         }
    9430             : 
    9431           0 :         return NULL;
    9432           0 : }
    9433             : 
    9434             : void *
    9435           0 : spdk_bdev_io_get_cb_arg(struct spdk_bdev_io *bdev_io)
    9436             : {
    9437           0 :         if (bdev_io == NULL) {
    9438           0 :                 assert(false);
    9439             :                 return NULL;
    9440             :         }
    9441             : 
    9442           0 :         return bdev_io->internal.caller_ctx;
    9443             : }
    9444             : 
    9445             : void
    9446           7 : spdk_bdev_module_list_add(struct spdk_bdev_module *bdev_module)
    9447             : {
    9448             : 
    9449           7 :         if (spdk_bdev_module_list_find(bdev_module->name)) {
    9450           0 :                 SPDK_ERRLOG("ERROR: module '%s' already registered.\n", bdev_module->name);
    9451           0 :                 assert(false);
    9452             :         }
    9453             : 
    9454           7 :         spdk_spin_init(&bdev_module->internal.spinlock);
    9455           7 :         TAILQ_INIT(&bdev_module->internal.quiesced_ranges);
    9456             : 
    9457             :         /*
    9458             :          * Modules with examine callbacks must be initialized first, so they are
    9459             :          *  ready to handle examine callbacks from later modules that will
    9460             :          *  register physical bdevs.
    9461             :          */
    9462           7 :         if (bdev_module->examine_config != NULL || bdev_module->examine_disk != NULL) {
    9463           4 :                 TAILQ_INSERT_HEAD(&g_bdev_mgr.bdev_modules, bdev_module, internal.tailq);
    9464           4 :         } else {
    9465           3 :                 TAILQ_INSERT_TAIL(&g_bdev_mgr.bdev_modules, bdev_module, internal.tailq);
    9466             :         }
    9467           7 : }
    9468             : 
    9469             : struct spdk_bdev_module *
    9470           7 : spdk_bdev_module_list_find(const char *name)
    9471             : {
    9472             :         struct spdk_bdev_module *bdev_module;
    9473             : 
    9474          14 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    9475           7 :                 if (strcmp(name, bdev_module->name) == 0) {
    9476           0 :                         break;
    9477             :                 }
    9478           7 :         }
    9479             : 
    9480           7 :         return bdev_module;
    9481             : }
    9482             : 
    9483             : static int
    9484           6 : bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io)
    9485             : {
    9486             :         uint64_t num_blocks;
    9487           6 :         void *md_buf = NULL;
    9488             : 
    9489           6 :         num_blocks = bdev_io->u.bdev.num_blocks;
    9490             : 
    9491           6 :         if (spdk_bdev_is_md_separate(bdev_io->bdev)) {
    9492           4 :                 md_buf = (char *)g_bdev_mgr.zero_buffer +
    9493           2 :                          spdk_bdev_get_block_size(bdev_io->bdev) * num_blocks;
    9494           2 :         }
    9495             : 
    9496          12 :         return bdev_write_blocks_with_md(bdev_io->internal.desc,
    9497           6 :                                          spdk_io_channel_from_ctx(bdev_io->internal.ch),
    9498           6 :                                          g_bdev_mgr.zero_buffer, md_buf,
    9499           6 :                                          bdev_io->u.bdev.offset_blocks, num_blocks,
    9500           6 :                                          bdev_write_zero_buffer_done, bdev_io);
    9501             : }
    9502             : 
    9503             : static void
    9504           6 : bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    9505             : {
    9506           6 :         struct spdk_bdev_io *parent_io = cb_arg;
    9507             : 
    9508           6 :         spdk_bdev_free_io(bdev_io);
    9509             : 
    9510           6 :         parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
    9511           6 :         parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
    9512           6 : }
    9513             : 
    9514             : static void
    9515          10 : bdev_set_qos_limit_done(struct set_qos_limit_ctx *ctx, int status)
    9516             : {
    9517          10 :         spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9518          10 :         ctx->bdev->internal.qos_mod_in_progress = false;
    9519          10 :         spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9520             : 
    9521          10 :         if (ctx->cb_fn) {
    9522           8 :                 ctx->cb_fn(ctx->cb_arg, status);
    9523           8 :         }
    9524          10 :         free(ctx);
    9525          10 : }
    9526             : 
    9527             : static void
    9528           2 : bdev_disable_qos_done(void *cb_arg)
    9529             : {
    9530           2 :         struct set_qos_limit_ctx *ctx = cb_arg;
    9531           2 :         struct spdk_bdev *bdev = ctx->bdev;
    9532             :         struct spdk_bdev_qos *qos;
    9533             : 
    9534           2 :         spdk_spin_lock(&bdev->internal.spinlock);
    9535           2 :         qos = bdev->internal.qos;
    9536           2 :         bdev->internal.qos = NULL;
    9537           2 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9538             : 
    9539           2 :         if (qos->thread != NULL) {
    9540           2 :                 spdk_put_io_channel(spdk_io_channel_from_ctx(qos->ch));
    9541           2 :                 spdk_poller_unregister(&qos->poller);
    9542           2 :         }
    9543             : 
    9544           2 :         free(qos);
    9545             : 
    9546           2 :         bdev_set_qos_limit_done(ctx, 0);
    9547           2 : }
    9548             : 
    9549             : static void
    9550           2 : bdev_disable_qos_msg_done(struct spdk_bdev *bdev, void *_ctx, int status)
    9551             : {
    9552           2 :         struct set_qos_limit_ctx *ctx = _ctx;
    9553             :         struct spdk_thread *thread;
    9554             : 
    9555           2 :         spdk_spin_lock(&bdev->internal.spinlock);
    9556           2 :         thread = bdev->internal.qos->thread;
    9557           2 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9558             : 
    9559           2 :         if (thread != NULL) {
    9560           2 :                 spdk_thread_send_msg(thread, bdev_disable_qos_done, ctx);
    9561           2 :         } else {
    9562           0 :                 bdev_disable_qos_done(ctx);
    9563             :         }
    9564           2 : }
    9565             : 
    9566             : static void
    9567           4 : bdev_disable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9568             :                      struct spdk_io_channel *ch, void *_ctx)
    9569             : {
    9570           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9571             :         struct spdk_bdev_io *bdev_io;
    9572             : 
    9573           4 :         bdev_ch->flags &= ~BDEV_CH_QOS_ENABLED;
    9574             : 
    9575           6 :         while (!TAILQ_EMPTY(&bdev_ch->qos_queued_io)) {
    9576             :                 /* Re-submit the queued I/O. */
    9577           2 :                 bdev_io = TAILQ_FIRST(&bdev_ch->qos_queued_io);
    9578           2 :                 TAILQ_REMOVE(&bdev_ch->qos_queued_io, bdev_io, internal.link);
    9579           2 :                 _bdev_io_submit(bdev_io);
    9580             :         }
    9581             : 
    9582           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    9583           4 : }
    9584             : 
    9585             : static void
    9586           1 : bdev_update_qos_rate_limit_msg(void *cb_arg)
    9587             : {
    9588           1 :         struct set_qos_limit_ctx *ctx = cb_arg;
    9589           1 :         struct spdk_bdev *bdev = ctx->bdev;
    9590             : 
    9591           1 :         spdk_spin_lock(&bdev->internal.spinlock);
    9592           1 :         bdev_qos_update_max_quota_per_timeslice(bdev->internal.qos);
    9593           1 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9594             : 
    9595           1 :         bdev_set_qos_limit_done(ctx, 0);
    9596           1 : }
    9597             : 
    9598             : static void
    9599           9 : bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9600             :                     struct spdk_io_channel *ch, void *_ctx)
    9601             : {
    9602           9 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9603             : 
    9604           9 :         spdk_spin_lock(&bdev->internal.spinlock);
    9605           9 :         bdev_enable_qos(bdev, bdev_ch);
    9606           9 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9607           9 :         spdk_bdev_for_each_channel_continue(i, 0);
    9608           9 : }
    9609             : 
    9610             : static void
    9611           6 : bdev_enable_qos_done(struct spdk_bdev *bdev, void *_ctx, int status)
    9612             : {
    9613           6 :         struct set_qos_limit_ctx *ctx = _ctx;
    9614             : 
    9615           6 :         bdev_set_qos_limit_done(ctx, status);
    9616           6 : }
    9617             : 
    9618             : static void
    9619           7 : bdev_set_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits)
    9620             : {
    9621             :         int i;
    9622             : 
    9623           7 :         assert(bdev->internal.qos != NULL);
    9624             : 
    9625          35 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9626          28 :                 if (limits[i] != SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    9627          28 :                         bdev->internal.qos->rate_limits[i].limit = limits[i];
    9628             : 
    9629          28 :                         if (limits[i] == 0) {
    9630          19 :                                 bdev->internal.qos->rate_limits[i].limit =
    9631             :                                         SPDK_BDEV_QOS_LIMIT_NOT_DEFINED;
    9632          19 :                         }
    9633          28 :                 }
    9634          28 :         }
    9635           7 : }
    9636             : 
    9637             : void
    9638           9 : spdk_bdev_set_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits,
    9639             :                               void (*cb_fn)(void *cb_arg, int status), void *cb_arg)
    9640             : {
    9641             :         struct set_qos_limit_ctx        *ctx;
    9642             :         uint32_t                        limit_set_complement;
    9643             :         uint64_t                        min_limit_per_sec;
    9644             :         int                             i;
    9645           9 :         bool                            disable_rate_limit = true;
    9646             : 
    9647          45 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9648          36 :                 if (limits[i] == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    9649           0 :                         continue;
    9650             :                 }
    9651             : 
    9652          36 :                 if (limits[i] > 0) {
    9653          10 :                         disable_rate_limit = false;
    9654          10 :                 }
    9655             : 
    9656          36 :                 if (bdev_qos_is_iops_rate_limit(i) == true) {
    9657           9 :                         min_limit_per_sec = SPDK_BDEV_QOS_MIN_IOS_PER_SEC;
    9658           9 :                 } else {
    9659          27 :                         if (limits[i] > SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC) {
    9660           0 :                                 SPDK_WARNLOG("Requested rate limit %" PRIu64 " will result in uint64_t overflow, "
    9661             :                                              "reset to %" PRIu64 "\n", limits[i], SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC);
    9662           0 :                                 limits[i] = SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC;
    9663           0 :                         }
    9664             :                         /* Change from megabyte to byte rate limit */
    9665          27 :                         limits[i] = limits[i] * 1024 * 1024;
    9666          27 :                         min_limit_per_sec = SPDK_BDEV_QOS_MIN_BYTES_PER_SEC;
    9667             :                 }
    9668             : 
    9669          36 :                 limit_set_complement = limits[i] % min_limit_per_sec;
    9670          36 :                 if (limit_set_complement) {
    9671           0 :                         SPDK_ERRLOG("Requested rate limit %" PRIu64 " is not a multiple of %" PRIu64 "\n",
    9672             :                                     limits[i], min_limit_per_sec);
    9673           0 :                         limits[i] += min_limit_per_sec - limit_set_complement;
    9674           0 :                         SPDK_ERRLOG("Round up the rate limit to %" PRIu64 "\n", limits[i]);
    9675           0 :                 }
    9676          36 :         }
    9677             : 
    9678           9 :         ctx = calloc(1, sizeof(*ctx));
    9679           9 :         if (ctx == NULL) {
    9680           0 :                 cb_fn(cb_arg, -ENOMEM);
    9681           0 :                 return;
    9682             :         }
    9683             : 
    9684           9 :         ctx->cb_fn = cb_fn;
    9685           9 :         ctx->cb_arg = cb_arg;
    9686           9 :         ctx->bdev = bdev;
    9687             : 
    9688           9 :         spdk_spin_lock(&bdev->internal.spinlock);
    9689           9 :         if (bdev->internal.qos_mod_in_progress) {
    9690           1 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9691           1 :                 free(ctx);
    9692           1 :                 cb_fn(cb_arg, -EAGAIN);
    9693           1 :                 return;
    9694             :         }
    9695           8 :         bdev->internal.qos_mod_in_progress = true;
    9696             : 
    9697           8 :         if (disable_rate_limit == true && bdev->internal.qos) {
    9698          10 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9699           8 :                         if (limits[i] == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED &&
    9700           0 :                             (bdev->internal.qos->rate_limits[i].limit > 0 &&
    9701           0 :                              bdev->internal.qos->rate_limits[i].limit !=
    9702             :                              SPDK_BDEV_QOS_LIMIT_NOT_DEFINED)) {
    9703           0 :                                 disable_rate_limit = false;
    9704           0 :                                 break;
    9705             :                         }
    9706           8 :                 }
    9707           2 :         }
    9708             : 
    9709           8 :         if (disable_rate_limit == false) {
    9710           5 :                 if (bdev->internal.qos == NULL) {
    9711           4 :                         bdev->internal.qos = calloc(1, sizeof(*bdev->internal.qos));
    9712           4 :                         if (!bdev->internal.qos) {
    9713           0 :                                 spdk_spin_unlock(&bdev->internal.spinlock);
    9714           0 :                                 SPDK_ERRLOG("Unable to allocate memory for QoS tracking\n");
    9715           0 :                                 bdev_set_qos_limit_done(ctx, -ENOMEM);
    9716           0 :                                 return;
    9717             :                         }
    9718           4 :                 }
    9719             : 
    9720           5 :                 if (bdev->internal.qos->thread == NULL) {
    9721             :                         /* Enabling */
    9722           4 :                         bdev_set_qos_rate_limits(bdev, limits);
    9723             : 
    9724           4 :                         spdk_bdev_for_each_channel(bdev, bdev_enable_qos_msg, ctx,
    9725             :                                                    bdev_enable_qos_done);
    9726           4 :                 } else {
    9727             :                         /* Updating */
    9728           1 :                         bdev_set_qos_rate_limits(bdev, limits);
    9729             : 
    9730           2 :                         spdk_thread_send_msg(bdev->internal.qos->thread,
    9731           1 :                                              bdev_update_qos_rate_limit_msg, ctx);
    9732             :                 }
    9733           5 :         } else {
    9734           3 :                 if (bdev->internal.qos != NULL) {
    9735           2 :                         bdev_set_qos_rate_limits(bdev, limits);
    9736             : 
    9737             :                         /* Disabling */
    9738           2 :                         spdk_bdev_for_each_channel(bdev, bdev_disable_qos_msg, ctx,
    9739             :                                                    bdev_disable_qos_msg_done);
    9740           2 :                 } else {
    9741           1 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    9742           1 :                         bdev_set_qos_limit_done(ctx, 0);
    9743           1 :                         return;
    9744             :                 }
    9745             :         }
    9746             : 
    9747           7 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9748           9 : }
    9749             : 
    9750             : struct spdk_bdev_histogram_ctx {
    9751             :         spdk_bdev_histogram_status_cb cb_fn;
    9752             :         void *cb_arg;
    9753             :         struct spdk_bdev *bdev;
    9754             :         int status;
    9755             : };
    9756             : 
    9757             : static void
    9758           2 : bdev_histogram_disable_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9759             : {
    9760           2 :         struct spdk_bdev_histogram_ctx *ctx = _ctx;
    9761             : 
    9762           2 :         spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9763           2 :         ctx->bdev->internal.histogram_in_progress = false;
    9764           2 :         spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9765           2 :         ctx->cb_fn(ctx->cb_arg, ctx->status);
    9766           2 :         free(ctx);
    9767           2 : }
    9768             : 
    9769             : static void
    9770           3 : bdev_histogram_disable_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9771             :                                struct spdk_io_channel *_ch, void *_ctx)
    9772             : {
    9773           3 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9774             : 
    9775           3 :         if (ch->histogram != NULL) {
    9776           3 :                 spdk_histogram_data_free(ch->histogram);
    9777           3 :                 ch->histogram = NULL;
    9778           3 :         }
    9779           3 :         spdk_bdev_for_each_channel_continue(i, 0);
    9780           3 : }
    9781             : 
    9782             : static void
    9783           2 : bdev_histogram_enable_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9784             : {
    9785           2 :         struct spdk_bdev_histogram_ctx *ctx = _ctx;
    9786             : 
    9787           2 :         if (status != 0) {
    9788           0 :                 ctx->status = status;
    9789           0 :                 ctx->bdev->internal.histogram_enabled = false;
    9790           0 :                 spdk_bdev_for_each_channel(ctx->bdev, bdev_histogram_disable_channel, ctx,
    9791             :                                            bdev_histogram_disable_channel_cb);
    9792           0 :         } else {
    9793           2 :                 spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9794           2 :                 ctx->bdev->internal.histogram_in_progress = false;
    9795           2 :                 spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9796           2 :                 ctx->cb_fn(ctx->cb_arg, ctx->status);
    9797           2 :                 free(ctx);
    9798             :         }
    9799           2 : }
    9800             : 
    9801             : static void
    9802           3 : bdev_histogram_enable_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9803             :                               struct spdk_io_channel *_ch, void *_ctx)
    9804             : {
    9805           3 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9806           3 :         int status = 0;
    9807             : 
    9808           3 :         if (ch->histogram == NULL) {
    9809           3 :                 ch->histogram = spdk_histogram_data_alloc();
    9810           3 :                 if (ch->histogram == NULL) {
    9811           0 :                         status = -ENOMEM;
    9812           0 :                 }
    9813           3 :         }
    9814             : 
    9815           3 :         spdk_bdev_for_each_channel_continue(i, status);
    9816           3 : }
    9817             : 
    9818             : void
    9819           4 : spdk_bdev_histogram_enable_ext(struct spdk_bdev *bdev, spdk_bdev_histogram_status_cb cb_fn,
    9820             :                                void *cb_arg, bool enable, struct spdk_bdev_enable_histogram_opts *opts)
    9821             : {
    9822             :         struct spdk_bdev_histogram_ctx *ctx;
    9823             : 
    9824           4 :         ctx = calloc(1, sizeof(struct spdk_bdev_histogram_ctx));
    9825           4 :         if (ctx == NULL) {
    9826           0 :                 cb_fn(cb_arg, -ENOMEM);
    9827           0 :                 return;
    9828             :         }
    9829             : 
    9830           4 :         ctx->bdev = bdev;
    9831           4 :         ctx->status = 0;
    9832           4 :         ctx->cb_fn = cb_fn;
    9833           4 :         ctx->cb_arg = cb_arg;
    9834             : 
    9835           4 :         spdk_spin_lock(&bdev->internal.spinlock);
    9836           4 :         if (bdev->internal.histogram_in_progress) {
    9837           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9838           0 :                 free(ctx);
    9839           0 :                 cb_fn(cb_arg, -EAGAIN);
    9840           0 :                 return;
    9841             :         }
    9842             : 
    9843           4 :         bdev->internal.histogram_in_progress = true;
    9844           4 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9845             : 
    9846           4 :         bdev->internal.histogram_enabled = enable;
    9847           4 :         bdev->internal.histogram_io_type = opts->io_type;
    9848             : 
    9849           4 :         if (enable) {
    9850             :                 /* Allocate histogram for each channel */
    9851           2 :                 spdk_bdev_for_each_channel(bdev, bdev_histogram_enable_channel, ctx,
    9852             :                                            bdev_histogram_enable_channel_cb);
    9853           2 :         } else {
    9854           2 :                 spdk_bdev_for_each_channel(bdev, bdev_histogram_disable_channel, ctx,
    9855             :                                            bdev_histogram_disable_channel_cb);
    9856             :         }
    9857           4 : }
    9858             : 
    9859             : void
    9860           4 : spdk_bdev_enable_histogram_opts_init(struct spdk_bdev_enable_histogram_opts *opts, size_t size)
    9861             : {
    9862           4 :         if (opts == NULL) {
    9863           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
    9864           0 :                 assert(opts != NULL);
    9865           0 :                 return;
    9866             :         }
    9867           4 :         if (size == 0) {
    9868           0 :                 SPDK_ERRLOG("size should not be zero\n");
    9869           0 :                 assert(size != 0);
    9870           0 :                 return;
    9871             :         }
    9872             : 
    9873           4 :         memset(opts, 0, size);
    9874           4 :         opts->size = size;
    9875             : 
    9876             : #define FIELD_OK(field) \
    9877             :         offsetof(struct spdk_bdev_enable_histogram_opts, field) + sizeof(opts->field) <= size
    9878             : 
    9879             : #define SET_FIELD(field, value) \
    9880             :         if (FIELD_OK(field)) { \
    9881             :                 opts->field = value; \
    9882             :         } \
    9883             : 
    9884           4 :         SET_FIELD(io_type, 0);
    9885             : 
    9886             :         /* You should not remove this statement, but need to update the assert statement
    9887             :          * if you add a new field, and also add a corresponding SET_FIELD statement */
    9888             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_enable_histogram_opts) == 9, "Incorrect size");
    9889             : 
    9890             : #undef FIELD_OK
    9891             : #undef SET_FIELD
    9892           4 : }
    9893             : 
    9894             : void
    9895           4 : spdk_bdev_histogram_enable(struct spdk_bdev *bdev, spdk_bdev_histogram_status_cb cb_fn,
    9896             :                            void *cb_arg, bool enable)
    9897             : {
    9898             :         struct spdk_bdev_enable_histogram_opts opts;
    9899             : 
    9900           4 :         spdk_bdev_enable_histogram_opts_init(&opts, sizeof(opts));
    9901           4 :         spdk_bdev_histogram_enable_ext(bdev, cb_fn, cb_arg, enable, &opts);
    9902           4 : }
    9903             : 
    9904             : struct spdk_bdev_histogram_data_ctx {
    9905             :         spdk_bdev_histogram_data_cb cb_fn;
    9906             :         void *cb_arg;
    9907             :         struct spdk_bdev *bdev;
    9908             :         /** merged histogram data from all channels */
    9909             :         struct spdk_histogram_data      *histogram;
    9910             : };
    9911             : 
    9912             : static void
    9913           5 : bdev_histogram_get_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9914             : {
    9915           5 :         struct spdk_bdev_histogram_data_ctx *ctx = _ctx;
    9916             : 
    9917           5 :         ctx->cb_fn(ctx->cb_arg, status, ctx->histogram);
    9918           5 :         free(ctx);
    9919           5 : }
    9920             : 
    9921             : static void
    9922           7 : bdev_histogram_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9923             :                            struct spdk_io_channel *_ch, void *_ctx)
    9924             : {
    9925           7 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9926           7 :         struct spdk_bdev_histogram_data_ctx *ctx = _ctx;
    9927           7 :         int status = 0;
    9928             : 
    9929           7 :         if (ch->histogram == NULL) {
    9930           1 :                 status = -EFAULT;
    9931           1 :         } else {
    9932           6 :                 spdk_histogram_data_merge(ctx->histogram, ch->histogram);
    9933             :         }
    9934             : 
    9935           7 :         spdk_bdev_for_each_channel_continue(i, status);
    9936           7 : }
    9937             : 
    9938             : void
    9939           5 : spdk_bdev_histogram_get(struct spdk_bdev *bdev, struct spdk_histogram_data *histogram,
    9940             :                         spdk_bdev_histogram_data_cb cb_fn,
    9941             :                         void *cb_arg)
    9942             : {
    9943             :         struct spdk_bdev_histogram_data_ctx *ctx;
    9944             : 
    9945           5 :         ctx = calloc(1, sizeof(struct spdk_bdev_histogram_data_ctx));
    9946           5 :         if (ctx == NULL) {
    9947           0 :                 cb_fn(cb_arg, -ENOMEM, NULL);
    9948           0 :                 return;
    9949             :         }
    9950             : 
    9951           5 :         ctx->bdev = bdev;
    9952           5 :         ctx->cb_fn = cb_fn;
    9953           5 :         ctx->cb_arg = cb_arg;
    9954             : 
    9955           5 :         ctx->histogram = histogram;
    9956             : 
    9957           5 :         spdk_bdev_for_each_channel(bdev, bdev_histogram_get_channel, ctx,
    9958             :                                    bdev_histogram_get_channel_cb);
    9959           5 : }
    9960             : 
    9961             : void
    9962           2 : spdk_bdev_channel_get_histogram(struct spdk_io_channel *ch, spdk_bdev_histogram_data_cb cb_fn,
    9963             :                                 void *cb_arg)
    9964             : {
    9965           2 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9966           2 :         int status = 0;
    9967             : 
    9968           2 :         assert(cb_fn != NULL);
    9969             : 
    9970           2 :         if (bdev_ch->histogram == NULL) {
    9971           1 :                 status = -EFAULT;
    9972           1 :         }
    9973           2 :         cb_fn(cb_arg, status, bdev_ch->histogram);
    9974           2 : }
    9975             : 
    9976             : size_t
    9977           0 : spdk_bdev_get_media_events(struct spdk_bdev_desc *desc, struct spdk_bdev_media_event *events,
    9978             :                            size_t max_events)
    9979             : {
    9980             :         struct media_event_entry *entry;
    9981           0 :         size_t num_events = 0;
    9982             : 
    9983           0 :         for (; num_events < max_events; ++num_events) {
    9984           0 :                 entry = TAILQ_FIRST(&desc->pending_media_events);
    9985           0 :                 if (entry == NULL) {
    9986           0 :                         break;
    9987             :                 }
    9988             : 
    9989           0 :                 events[num_events] = entry->event;
    9990           0 :                 TAILQ_REMOVE(&desc->pending_media_events, entry, tailq);
    9991           0 :                 TAILQ_INSERT_TAIL(&desc->free_media_events, entry, tailq);
    9992           0 :         }
    9993             : 
    9994           0 :         return num_events;
    9995             : }
    9996             : 
    9997             : int
    9998           0 : spdk_bdev_push_media_events(struct spdk_bdev *bdev, const struct spdk_bdev_media_event *events,
    9999             :                             size_t num_events)
   10000             : {
   10001             :         struct spdk_bdev_desc *desc;
   10002             :         struct media_event_entry *entry;
   10003             :         size_t event_id;
   10004           0 :         int rc = 0;
   10005             : 
   10006           0 :         assert(bdev->media_events);
   10007             : 
   10008           0 :         spdk_spin_lock(&bdev->internal.spinlock);
   10009           0 :         TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
   10010           0 :                 if (desc->write) {
   10011           0 :                         break;
   10012             :                 }
   10013           0 :         }
   10014             : 
   10015           0 :         if (desc == NULL || desc->media_events_buffer == NULL) {
   10016           0 :                 rc = -ENODEV;
   10017           0 :                 goto out;
   10018             :         }
   10019             : 
   10020           0 :         for (event_id = 0; event_id < num_events; ++event_id) {
   10021           0 :                 entry = TAILQ_FIRST(&desc->free_media_events);
   10022           0 :                 if (entry == NULL) {
   10023           0 :                         break;
   10024             :                 }
   10025             : 
   10026           0 :                 TAILQ_REMOVE(&desc->free_media_events, entry, tailq);
   10027           0 :                 TAILQ_INSERT_TAIL(&desc->pending_media_events, entry, tailq);
   10028           0 :                 entry->event = events[event_id];
   10029           0 :         }
   10030             : 
   10031           0 :         rc = event_id;
   10032             : out:
   10033           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10034           0 :         return rc;
   10035             : }
   10036             : 
   10037             : static void
   10038           0 : _media_management_notify(void *arg)
   10039             : {
   10040           0 :         struct spdk_bdev_desc *desc = arg;
   10041             : 
   10042           0 :         _event_notify(desc, SPDK_BDEV_EVENT_MEDIA_MANAGEMENT);
   10043           0 : }
   10044             : 
   10045             : void
   10046           0 : spdk_bdev_notify_media_management(struct spdk_bdev *bdev)
   10047             : {
   10048             :         struct spdk_bdev_desc *desc;
   10049             : 
   10050           0 :         spdk_spin_lock(&bdev->internal.spinlock);
   10051           0 :         TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
   10052           0 :                 if (!TAILQ_EMPTY(&desc->pending_media_events)) {
   10053           0 :                         event_notify(desc, _media_management_notify);
   10054           0 :                 }
   10055           0 :         }
   10056           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10057           0 : }
   10058             : 
   10059             : struct locked_lba_range_ctx {
   10060             :         struct lba_range                range;
   10061             :         struct lba_range                *current_range;
   10062             :         struct lba_range                *owner_range;
   10063             :         struct spdk_poller              *poller;
   10064             :         lock_range_cb                   cb_fn;
   10065             :         void                            *cb_arg;
   10066             : };
   10067             : 
   10068             : static void
   10069           0 : bdev_lock_error_cleanup_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10070             : {
   10071           0 :         struct locked_lba_range_ctx *ctx = _ctx;
   10072             : 
   10073           0 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, -ENOMEM);
   10074           0 :         free(ctx);
   10075           0 : }
   10076             : 
   10077             : static void bdev_unlock_lba_range_get_channel(struct spdk_bdev_channel_iter *i,
   10078             :                 struct spdk_bdev *bdev, struct spdk_io_channel *ch, void *_ctx);
   10079             : 
   10080             : static void
   10081          14 : bdev_lock_lba_range_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10082             : {
   10083          14 :         struct locked_lba_range_ctx *ctx = _ctx;
   10084             : 
   10085          14 :         if (status == -ENOMEM) {
   10086             :                 /* One of the channels could not allocate a range object.
   10087             :                  * So we have to go back and clean up any ranges that were
   10088             :                  * allocated successfully before we return error status to
   10089             :                  * the caller.  We can reuse the unlock function to do that
   10090             :                  * clean up.
   10091             :                  */
   10092           0 :                 spdk_bdev_for_each_channel(bdev, bdev_unlock_lba_range_get_channel, ctx,
   10093             :                                            bdev_lock_error_cleanup_cb);
   10094           0 :                 return;
   10095             :         }
   10096             : 
   10097             :         /* All channels have locked this range and no I/O overlapping the range
   10098             :          * are outstanding!  Set the owner_ch for the range object for the
   10099             :          * locking channel, so that this channel will know that it is allowed
   10100             :          * to write to this range.
   10101             :          */
   10102          14 :         if (ctx->owner_range != NULL) {
   10103          10 :                 ctx->owner_range->owner_ch = ctx->range.owner_ch;
   10104          10 :         }
   10105             : 
   10106          14 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, status);
   10107             : 
   10108             :         /* Don't free the ctx here.  Its range is in the bdev's global list of
   10109             :          * locked ranges still, and will be removed and freed when this range
   10110             :          * is later unlocked.
   10111             :          */
   10112          14 : }
   10113             : 
   10114             : static int
   10115          17 : bdev_lock_lba_range_check_io(void *_i)
   10116             : {
   10117          17 :         struct spdk_bdev_channel_iter *i = _i;
   10118          17 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i->i);
   10119          17 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10120          17 :         struct locked_lba_range_ctx *ctx = i->ctx;
   10121          17 :         struct lba_range *range = ctx->current_range;
   10122             :         struct spdk_bdev_io *bdev_io;
   10123             : 
   10124          17 :         spdk_poller_unregister(&ctx->poller);
   10125             : 
   10126             :         /* The range is now in the locked_ranges, so no new IO can be submitted to this
   10127             :          * range.  But we need to wait until any outstanding IO overlapping with this range
   10128             :          * are completed.
   10129             :          */
   10130          18 :         TAILQ_FOREACH(bdev_io, &ch->io_submitted, internal.ch_link) {
   10131           3 :                 if (bdev_io_range_is_locked(bdev_io, range)) {
   10132           2 :                         ctx->poller = SPDK_POLLER_REGISTER(bdev_lock_lba_range_check_io, i, 100);
   10133           2 :                         return SPDK_POLLER_BUSY;
   10134             :                 }
   10135           1 :         }
   10136             : 
   10137          15 :         spdk_bdev_for_each_channel_continue(i, 0);
   10138          15 :         return SPDK_POLLER_BUSY;
   10139          17 : }
   10140             : 
   10141             : static void
   10142          15 : bdev_lock_lba_range_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10143             :                                 struct spdk_io_channel *_ch, void *_ctx)
   10144             : {
   10145          15 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10146          15 :         struct locked_lba_range_ctx *ctx = _ctx;
   10147             :         struct lba_range *range;
   10148             : 
   10149          16 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10150           1 :                 if (range->length == ctx->range.length &&
   10151           0 :                     range->offset == ctx->range.offset &&
   10152           0 :                     range->locked_ctx == ctx->range.locked_ctx) {
   10153             :                         /* This range already exists on this channel, so don't add
   10154             :                          * it again.  This can happen when a new channel is created
   10155             :                          * while the for_each_channel operation is in progress.
   10156             :                          * Do not check for outstanding I/O in that case, since the
   10157             :                          * range was locked before any I/O could be submitted to the
   10158             :                          * new channel.
   10159             :                          */
   10160           0 :                         spdk_bdev_for_each_channel_continue(i, 0);
   10161           0 :                         return;
   10162             :                 }
   10163           1 :         }
   10164             : 
   10165          15 :         range = calloc(1, sizeof(*range));
   10166          15 :         if (range == NULL) {
   10167           0 :                 spdk_bdev_for_each_channel_continue(i, -ENOMEM);
   10168           0 :                 return;
   10169             :         }
   10170             : 
   10171          15 :         range->length = ctx->range.length;
   10172          15 :         range->offset = ctx->range.offset;
   10173          15 :         range->locked_ctx = ctx->range.locked_ctx;
   10174          15 :         range->quiesce = ctx->range.quiesce;
   10175          15 :         ctx->current_range = range;
   10176          15 :         if (ctx->range.owner_ch == ch) {
   10177             :                 /* This is the range object for the channel that will hold
   10178             :                  * the lock.  Store it in the ctx object so that we can easily
   10179             :                  * set its owner_ch after the lock is finally acquired.
   10180             :                  */
   10181          10 :                 ctx->owner_range = range;
   10182          10 :         }
   10183          15 :         TAILQ_INSERT_TAIL(&ch->locked_ranges, range, tailq);
   10184          15 :         bdev_lock_lba_range_check_io(i);
   10185          15 : }
   10186             : 
   10187             : static void
   10188          14 : bdev_lock_lba_range_ctx(struct spdk_bdev *bdev, struct locked_lba_range_ctx *ctx)
   10189             : {
   10190          14 :         assert(spdk_get_thread() == ctx->range.owner_thread);
   10191          14 :         assert(ctx->range.owner_ch == NULL ||
   10192             :                spdk_io_channel_get_thread(ctx->range.owner_ch->channel) == ctx->range.owner_thread);
   10193             : 
   10194             :         /* We will add a copy of this range to each channel now. */
   10195          14 :         spdk_bdev_for_each_channel(bdev, bdev_lock_lba_range_get_channel, ctx,
   10196             :                                    bdev_lock_lba_range_cb);
   10197          14 : }
   10198             : 
   10199             : static bool
   10200          17 : bdev_lba_range_overlaps_tailq(struct lba_range *range, lba_range_tailq_t *tailq)
   10201             : {
   10202             :         struct lba_range *r;
   10203             : 
   10204          18 :         TAILQ_FOREACH(r, tailq, tailq) {
   10205           4 :                 if (bdev_lba_range_overlapped(range, r)) {
   10206           3 :                         return true;
   10207             :                 }
   10208           1 :         }
   10209          14 :         return false;
   10210          17 : }
   10211             : 
   10212             : static void bdev_quiesce_range_locked(struct lba_range *range, void *ctx, int status);
   10213             : 
   10214             : static int
   10215          14 : _bdev_lock_lba_range(struct spdk_bdev *bdev, struct spdk_bdev_channel *ch,
   10216             :                      uint64_t offset, uint64_t length,
   10217             :                      lock_range_cb cb_fn, void *cb_arg)
   10218             : {
   10219             :         struct locked_lba_range_ctx *ctx;
   10220             : 
   10221          14 :         ctx = calloc(1, sizeof(*ctx));
   10222          14 :         if (ctx == NULL) {
   10223           0 :                 return -ENOMEM;
   10224             :         }
   10225             : 
   10226          14 :         ctx->range.offset = offset;
   10227          14 :         ctx->range.length = length;
   10228          14 :         ctx->range.owner_thread = spdk_get_thread();
   10229          14 :         ctx->range.owner_ch = ch;
   10230          14 :         ctx->range.locked_ctx = cb_arg;
   10231          14 :         ctx->range.bdev = bdev;
   10232          14 :         ctx->range.quiesce = (cb_fn == bdev_quiesce_range_locked);
   10233          14 :         ctx->cb_fn = cb_fn;
   10234          14 :         ctx->cb_arg = cb_arg;
   10235             : 
   10236          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10237          14 :         if (bdev_lba_range_overlaps_tailq(&ctx->range, &bdev->internal.locked_ranges)) {
   10238             :                 /* There is an active lock overlapping with this range.
   10239             :                  * Put it on the pending list until this range no
   10240             :                  * longer overlaps with another.
   10241             :                  */
   10242           2 :                 TAILQ_INSERT_TAIL(&bdev->internal.pending_locked_ranges, &ctx->range, tailq);
   10243           2 :         } else {
   10244          12 :                 TAILQ_INSERT_TAIL(&bdev->internal.locked_ranges, &ctx->range, tailq);
   10245          12 :                 bdev_lock_lba_range_ctx(bdev, ctx);
   10246             :         }
   10247          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10248          14 :         return 0;
   10249          14 : }
   10250             : 
   10251             : static int
   10252          10 : bdev_lock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
   10253             :                     uint64_t offset, uint64_t length,
   10254             :                     lock_range_cb cb_fn, void *cb_arg)
   10255             : {
   10256          10 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10257          10 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10258             : 
   10259          10 :         if (cb_arg == NULL) {
   10260           0 :                 SPDK_ERRLOG("cb_arg must not be NULL\n");
   10261           0 :                 return -EINVAL;
   10262             :         }
   10263             : 
   10264          10 :         return _bdev_lock_lba_range(bdev, ch, offset, length, cb_fn, cb_arg);
   10265          10 : }
   10266             : 
   10267             : static void
   10268           2 : bdev_lock_lba_range_ctx_msg(void *_ctx)
   10269             : {
   10270           2 :         struct locked_lba_range_ctx *ctx = _ctx;
   10271             : 
   10272           2 :         bdev_lock_lba_range_ctx(ctx->range.bdev, ctx);
   10273           2 : }
   10274             : 
   10275             : static void
   10276          14 : bdev_unlock_lba_range_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10277             : {
   10278          14 :         struct locked_lba_range_ctx *ctx = _ctx;
   10279             :         struct locked_lba_range_ctx *pending_ctx;
   10280             :         struct lba_range *range, *tmp;
   10281             : 
   10282          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10283             :         /* Check if there are any pending locked ranges that overlap with this range
   10284             :          * that was just unlocked.  If there are, check that it doesn't overlap with any
   10285             :          * other locked ranges before calling bdev_lock_lba_range_ctx which will start
   10286             :          * the lock process.
   10287             :          */
   10288          17 :         TAILQ_FOREACH_SAFE(range, &bdev->internal.pending_locked_ranges, tailq, tmp) {
   10289           3 :                 if (bdev_lba_range_overlapped(range, &ctx->range) &&
   10290           3 :                     !bdev_lba_range_overlaps_tailq(range, &bdev->internal.locked_ranges)) {
   10291           2 :                         TAILQ_REMOVE(&bdev->internal.pending_locked_ranges, range, tailq);
   10292           2 :                         pending_ctx = SPDK_CONTAINEROF(range, struct locked_lba_range_ctx, range);
   10293           2 :                         TAILQ_INSERT_TAIL(&bdev->internal.locked_ranges, range, tailq);
   10294           4 :                         spdk_thread_send_msg(pending_ctx->range.owner_thread,
   10295           2 :                                              bdev_lock_lba_range_ctx_msg, pending_ctx);
   10296           2 :                 }
   10297           3 :         }
   10298          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10299             : 
   10300          14 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, status);
   10301          14 :         free(ctx);
   10302          14 : }
   10303             : 
   10304             : static void
   10305          16 : bdev_unlock_lba_range_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10306             :                                   struct spdk_io_channel *_ch, void *_ctx)
   10307             : {
   10308          16 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10309          16 :         struct locked_lba_range_ctx *ctx = _ctx;
   10310             :         TAILQ_HEAD(, spdk_bdev_io) io_locked;
   10311             :         struct spdk_bdev_io *bdev_io;
   10312             :         struct lba_range *range;
   10313             : 
   10314          16 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10315          32 :                 if (ctx->range.offset == range->offset &&
   10316          16 :                     ctx->range.length == range->length &&
   10317          16 :                     ctx->range.locked_ctx == range->locked_ctx) {
   10318          16 :                         TAILQ_REMOVE(&ch->locked_ranges, range, tailq);
   10319          16 :                         free(range);
   10320          16 :                         break;
   10321             :                 }
   10322           0 :         }
   10323             : 
   10324             :         /* Note: we should almost always be able to assert that the range specified
   10325             :          * was found.  But there are some very rare corner cases where a new channel
   10326             :          * gets created simultaneously with a range unlock, where this function
   10327             :          * would execute on that new channel and wouldn't have the range.
   10328             :          * We also use this to clean up range allocations when a later allocation
   10329             :          * fails in the locking path.
   10330             :          * So we can't actually assert() here.
   10331             :          */
   10332             : 
   10333             :         /* Swap the locked IO into a temporary list, and then try to submit them again.
   10334             :          * We could hyper-optimize this to only resubmit locked I/O that overlap
   10335             :          * with the range that was just unlocked, but this isn't a performance path so
   10336             :          * we go for simplicity here.
   10337             :          */
   10338          16 :         TAILQ_INIT(&io_locked);
   10339          16 :         TAILQ_SWAP(&ch->io_locked, &io_locked, spdk_bdev_io, internal.ch_link);
   10340          19 :         while (!TAILQ_EMPTY(&io_locked)) {
   10341           3 :                 bdev_io = TAILQ_FIRST(&io_locked);
   10342           3 :                 TAILQ_REMOVE(&io_locked, bdev_io, internal.ch_link);
   10343           3 :                 bdev_io_submit(bdev_io);
   10344             :         }
   10345             : 
   10346          16 :         spdk_bdev_for_each_channel_continue(i, 0);
   10347          16 : }
   10348             : 
   10349             : static int
   10350          14 : _bdev_unlock_lba_range(struct spdk_bdev *bdev, uint64_t offset, uint64_t length,
   10351             :                        lock_range_cb cb_fn, void *cb_arg)
   10352             : {
   10353             :         struct locked_lba_range_ctx *ctx;
   10354             :         struct lba_range *range;
   10355             : 
   10356          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10357             :         /* To start the unlock the process, we find the range in the bdev's locked_ranges
   10358             :          * and remove it. This ensures new channels don't inherit the locked range.
   10359             :          * Then we will send a message to each channel to remove the range from its
   10360             :          * per-channel list.
   10361             :          */
   10362          14 :         TAILQ_FOREACH(range, &bdev->internal.locked_ranges, tailq) {
   10363          24 :                 if (range->offset == offset && range->length == length &&
   10364          14 :                     (range->owner_ch == NULL || range->locked_ctx == cb_arg)) {
   10365          14 :                         break;
   10366             :                 }
   10367           0 :         }
   10368          14 :         if (range == NULL) {
   10369           0 :                 assert(false);
   10370             :                 spdk_spin_unlock(&bdev->internal.spinlock);
   10371             :                 return -EINVAL;
   10372             :         }
   10373          14 :         TAILQ_REMOVE(&bdev->internal.locked_ranges, range, tailq);
   10374          14 :         ctx = SPDK_CONTAINEROF(range, struct locked_lba_range_ctx, range);
   10375          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10376             : 
   10377          14 :         ctx->cb_fn = cb_fn;
   10378          14 :         ctx->cb_arg = cb_arg;
   10379             : 
   10380          14 :         spdk_bdev_for_each_channel(bdev, bdev_unlock_lba_range_get_channel, ctx,
   10381             :                                    bdev_unlock_lba_range_cb);
   10382          14 :         return 0;
   10383             : }
   10384             : 
   10385             : static int
   10386          12 : bdev_unlock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
   10387             :                       uint64_t offset, uint64_t length,
   10388             :                       lock_range_cb cb_fn, void *cb_arg)
   10389             : {
   10390          12 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10391          12 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10392             :         struct lba_range *range;
   10393          12 :         bool range_found = false;
   10394             : 
   10395             :         /* Let's make sure the specified channel actually has a lock on
   10396             :          * the specified range.  Note that the range must match exactly.
   10397             :          */
   10398          14 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10399          22 :                 if (range->offset == offset && range->length == length &&
   10400          11 :                     range->owner_ch == ch && range->locked_ctx == cb_arg) {
   10401          10 :                         range_found = true;
   10402          10 :                         break;
   10403             :                 }
   10404           2 :         }
   10405             : 
   10406          12 :         if (!range_found) {
   10407           2 :                 return -EINVAL;
   10408             :         }
   10409             : 
   10410          10 :         return _bdev_unlock_lba_range(bdev, offset, length, cb_fn, cb_arg);
   10411          12 : }
   10412             : 
   10413             : struct bdev_quiesce_ctx {
   10414             :         spdk_bdev_quiesce_cb cb_fn;
   10415             :         void *cb_arg;
   10416             : };
   10417             : 
   10418             : static void
   10419           4 : bdev_unquiesce_range_unlocked(struct lba_range *range, void *ctx, int status)
   10420             : {
   10421           4 :         struct bdev_quiesce_ctx *quiesce_ctx = ctx;
   10422             : 
   10423           4 :         if (quiesce_ctx->cb_fn != NULL) {
   10424           4 :                 quiesce_ctx->cb_fn(quiesce_ctx->cb_arg, status);
   10425           4 :         }
   10426             : 
   10427           4 :         free(quiesce_ctx);
   10428           4 : }
   10429             : 
   10430             : static void
   10431           4 : bdev_quiesce_range_locked(struct lba_range *range, void *ctx, int status)
   10432             : {
   10433           4 :         struct bdev_quiesce_ctx *quiesce_ctx = ctx;
   10434           4 :         struct spdk_bdev_module *module = range->bdev->module;
   10435             : 
   10436           4 :         if (status != 0) {
   10437           0 :                 if (quiesce_ctx->cb_fn != NULL) {
   10438           0 :                         quiesce_ctx->cb_fn(quiesce_ctx->cb_arg, status);
   10439           0 :                 }
   10440           0 :                 free(quiesce_ctx);
   10441           0 :                 return;
   10442             :         }
   10443             : 
   10444           4 :         spdk_spin_lock(&module->internal.spinlock);
   10445           4 :         TAILQ_INSERT_TAIL(&module->internal.quiesced_ranges, range, tailq_module);
   10446           4 :         spdk_spin_unlock(&module->internal.spinlock);
   10447             : 
   10448           4 :         if (quiesce_ctx->cb_fn != NULL) {
   10449             :                 /* copy the context in case the range is unlocked by the callback */
   10450           4 :                 struct bdev_quiesce_ctx tmp = *quiesce_ctx;
   10451             : 
   10452           4 :                 quiesce_ctx->cb_fn = NULL;
   10453           4 :                 quiesce_ctx->cb_arg = NULL;
   10454             : 
   10455           4 :                 tmp.cb_fn(tmp.cb_arg, status);
   10456           4 :         }
   10457             :         /* quiesce_ctx will be freed on unquiesce */
   10458           4 : }
   10459             : 
   10460             : static int
   10461           9 : _spdk_bdev_quiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10462             :                    uint64_t offset, uint64_t length,
   10463             :                    spdk_bdev_quiesce_cb cb_fn, void *cb_arg,
   10464             :                    bool unquiesce)
   10465             : {
   10466             :         struct bdev_quiesce_ctx *quiesce_ctx;
   10467             :         int rc;
   10468             : 
   10469           9 :         if (module != bdev->module) {
   10470           0 :                 SPDK_ERRLOG("Bdev does not belong to specified module.\n");
   10471           0 :                 return -EINVAL;
   10472             :         }
   10473             : 
   10474           9 :         if (!bdev_io_valid_blocks(bdev, offset, length)) {
   10475           0 :                 return -EINVAL;
   10476             :         }
   10477             : 
   10478           9 :         if (unquiesce) {
   10479             :                 struct lba_range *range;
   10480             : 
   10481             :                 /* Make sure the specified range is actually quiesced in the specified module and
   10482             :                  * then remove it from the list. Note that the range must match exactly.
   10483             :                  */
   10484           5 :                 spdk_spin_lock(&module->internal.spinlock);
   10485           6 :                 TAILQ_FOREACH(range, &module->internal.quiesced_ranges, tailq_module) {
   10486           5 :                         if (range->bdev == bdev && range->offset == offset && range->length == length) {
   10487           4 :                                 TAILQ_REMOVE(&module->internal.quiesced_ranges, range, tailq_module);
   10488           4 :                                 break;
   10489             :                         }
   10490           1 :                 }
   10491           5 :                 spdk_spin_unlock(&module->internal.spinlock);
   10492             : 
   10493           5 :                 if (range == NULL) {
   10494           1 :                         SPDK_ERRLOG("The range to unquiesce was not found.\n");
   10495           1 :                         return -EINVAL;
   10496             :                 }
   10497             : 
   10498           4 :                 quiesce_ctx = range->locked_ctx;
   10499           4 :                 quiesce_ctx->cb_fn = cb_fn;
   10500           4 :                 quiesce_ctx->cb_arg = cb_arg;
   10501             : 
   10502           4 :                 rc = _bdev_unlock_lba_range(bdev, offset, length, bdev_unquiesce_range_unlocked, quiesce_ctx);
   10503           4 :         } else {
   10504           4 :                 quiesce_ctx = malloc(sizeof(*quiesce_ctx));
   10505           4 :                 if (quiesce_ctx == NULL) {
   10506           0 :                         return -ENOMEM;
   10507             :                 }
   10508             : 
   10509           4 :                 quiesce_ctx->cb_fn = cb_fn;
   10510           4 :                 quiesce_ctx->cb_arg = cb_arg;
   10511             : 
   10512           4 :                 rc = _bdev_lock_lba_range(bdev, NULL, offset, length, bdev_quiesce_range_locked, quiesce_ctx);
   10513           4 :                 if (rc != 0) {
   10514           0 :                         free(quiesce_ctx);
   10515           0 :                 }
   10516             :         }
   10517             : 
   10518           8 :         return rc;
   10519           9 : }
   10520             : 
   10521             : int
   10522           3 : spdk_bdev_quiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10523             :                   spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10524             : {
   10525           3 :         return _spdk_bdev_quiesce(bdev, module, 0, bdev->blockcnt, cb_fn, cb_arg, false);
   10526             : }
   10527             : 
   10528             : int
   10529           3 : spdk_bdev_unquiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10530             :                     spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10531             : {
   10532           3 :         return _spdk_bdev_quiesce(bdev, module, 0, bdev->blockcnt, cb_fn, cb_arg, true);
   10533             : }
   10534             : 
   10535             : int
   10536           1 : spdk_bdev_quiesce_range(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10537             :                         uint64_t offset, uint64_t length,
   10538             :                         spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10539             : {
   10540           1 :         return _spdk_bdev_quiesce(bdev, module, offset, length, cb_fn, cb_arg, false);
   10541             : }
   10542             : 
   10543             : int
   10544           2 : spdk_bdev_unquiesce_range(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10545             :                           uint64_t offset, uint64_t length,
   10546             :                           spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10547             : {
   10548           2 :         return _spdk_bdev_quiesce(bdev, module, offset, length, cb_fn, cb_arg, true);
   10549             : }
   10550             : 
   10551             : int
   10552         273 : spdk_bdev_get_memory_domains(struct spdk_bdev *bdev, struct spdk_memory_domain **domains,
   10553             :                              int array_size)
   10554             : {
   10555         273 :         if (!bdev) {
   10556           1 :                 return -EINVAL;
   10557             :         }
   10558             : 
   10559         272 :         if (bdev->fn_table->get_memory_domains) {
   10560           3 :                 return bdev->fn_table->get_memory_domains(bdev->ctxt, domains, array_size);
   10561             :         }
   10562             : 
   10563         269 :         return 0;
   10564         273 : }
   10565             : 
   10566             : struct spdk_bdev_for_each_io_ctx {
   10567             :         void *ctx;
   10568             :         spdk_bdev_io_fn fn;
   10569             :         spdk_bdev_for_each_io_cb cb;
   10570             : };
   10571             : 
   10572             : static void
   10573           0 : bdev_channel_for_each_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10574             :                          struct spdk_io_channel *io_ch, void *_ctx)
   10575             : {
   10576           0 :         struct spdk_bdev_for_each_io_ctx *ctx = _ctx;
   10577           0 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
   10578             :         struct spdk_bdev_io *bdev_io;
   10579           0 :         int rc = 0;
   10580             : 
   10581           0 :         TAILQ_FOREACH(bdev_io, &bdev_ch->io_submitted, internal.ch_link) {
   10582           0 :                 rc = ctx->fn(ctx->ctx, bdev_io);
   10583           0 :                 if (rc != 0) {
   10584           0 :                         break;
   10585             :                 }
   10586           0 :         }
   10587             : 
   10588           0 :         spdk_bdev_for_each_channel_continue(i, rc);
   10589           0 : }
   10590             : 
   10591             : static void
   10592           0 : bdev_for_each_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
   10593             : {
   10594           0 :         struct spdk_bdev_for_each_io_ctx *ctx = _ctx;
   10595             : 
   10596           0 :         ctx->cb(ctx->ctx, status);
   10597             : 
   10598           0 :         free(ctx);
   10599           0 : }
   10600             : 
   10601             : void
   10602           0 : spdk_bdev_for_each_bdev_io(struct spdk_bdev *bdev, void *_ctx, spdk_bdev_io_fn fn,
   10603             :                            spdk_bdev_for_each_io_cb cb)
   10604             : {
   10605             :         struct spdk_bdev_for_each_io_ctx *ctx;
   10606             : 
   10607           0 :         assert(fn != NULL && cb != NULL);
   10608             : 
   10609           0 :         ctx = calloc(1, sizeof(*ctx));
   10610           0 :         if (ctx == NULL) {
   10611           0 :                 SPDK_ERRLOG("Failed to allocate context.\n");
   10612           0 :                 cb(_ctx, -ENOMEM);
   10613           0 :                 return;
   10614             :         }
   10615             : 
   10616           0 :         ctx->ctx = _ctx;
   10617           0 :         ctx->fn = fn;
   10618           0 :         ctx->cb = cb;
   10619             : 
   10620           0 :         spdk_bdev_for_each_channel(bdev, bdev_channel_for_each_io, ctx,
   10621             :                                    bdev_for_each_io_done);
   10622           0 : }
   10623             : 
   10624             : void
   10625         132 : spdk_bdev_for_each_channel_continue(struct spdk_bdev_channel_iter *iter, int status)
   10626             : {
   10627         132 :         spdk_for_each_channel_continue(iter->i, status);
   10628         132 : }
   10629             : 
   10630             : static struct spdk_bdev *
   10631         362 : io_channel_iter_get_bdev(struct spdk_io_channel_iter *i)
   10632             : {
   10633         362 :         void *io_device = spdk_io_channel_iter_get_io_device(i);
   10634             : 
   10635         362 :         return __bdev_from_io_dev(io_device);
   10636             : }
   10637             : 
   10638             : static void
   10639         132 : bdev_each_channel_msg(struct spdk_io_channel_iter *i)
   10640             : {
   10641         132 :         struct spdk_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
   10642         132 :         struct spdk_bdev *bdev = io_channel_iter_get_bdev(i);
   10643         132 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
   10644             : 
   10645         132 :         iter->i = i;
   10646         132 :         iter->fn(iter, bdev, ch, iter->ctx);
   10647         132 : }
   10648             : 
   10649             : static void
   10650         230 : bdev_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
   10651             : {
   10652         230 :         struct spdk_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
   10653         230 :         struct spdk_bdev *bdev = io_channel_iter_get_bdev(i);
   10654             : 
   10655         230 :         iter->i = i;
   10656         230 :         iter->cpl(bdev, iter->ctx, status);
   10657             : 
   10658         230 :         free(iter);
   10659         230 : }
   10660             : 
   10661             : void
   10662         230 : spdk_bdev_for_each_channel(struct spdk_bdev *bdev, spdk_bdev_for_each_channel_msg fn,
   10663             :                            void *ctx, spdk_bdev_for_each_channel_done cpl)
   10664             : {
   10665             :         struct spdk_bdev_channel_iter *iter;
   10666             : 
   10667         230 :         assert(bdev != NULL && fn != NULL && ctx != NULL);
   10668             : 
   10669         230 :         iter = calloc(1, sizeof(struct spdk_bdev_channel_iter));
   10670         230 :         if (iter == NULL) {
   10671           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
   10672           0 :                 assert(false);
   10673             :                 return;
   10674             :         }
   10675             : 
   10676         230 :         iter->fn = fn;
   10677         230 :         iter->cpl = cpl;
   10678         230 :         iter->ctx = ctx;
   10679             : 
   10680         460 :         spdk_for_each_channel(__bdev_to_io_dev(bdev), bdev_each_channel_msg,
   10681         230 :                               iter, bdev_each_channel_cpl);
   10682         230 : }
   10683             : 
   10684             : static void
   10685           3 : bdev_copy_do_write_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
   10686             : {
   10687           3 :         struct spdk_bdev_io *parent_io = cb_arg;
   10688             : 
   10689           3 :         spdk_bdev_free_io(bdev_io);
   10690             : 
   10691             :         /* Check return status of write */
   10692           3 :         parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
   10693           3 :         parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
   10694           3 : }
   10695             : 
   10696             : static void
   10697           3 : bdev_copy_do_write(void *_bdev_io)
   10698             : {
   10699           3 :         struct spdk_bdev_io *bdev_io = _bdev_io;
   10700             :         int rc;
   10701             : 
   10702             :         /* Write blocks */
   10703           6 :         rc = spdk_bdev_write_blocks_with_md(bdev_io->internal.desc,
   10704           3 :                                             spdk_io_channel_from_ctx(bdev_io->internal.ch),
   10705           3 :                                             bdev_io->u.bdev.iovs[0].iov_base,
   10706           3 :                                             bdev_io->u.bdev.md_buf, bdev_io->u.bdev.offset_blocks,
   10707           3 :                                             bdev_io->u.bdev.num_blocks, bdev_copy_do_write_done, bdev_io);
   10708             : 
   10709           3 :         if (rc == -ENOMEM) {
   10710           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_copy_do_write);
   10711           3 :         } else if (rc != 0) {
   10712           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10713           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10714           0 :         }
   10715           3 : }
   10716             : 
   10717             : static void
   10718           3 : bdev_copy_do_read_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
   10719             : {
   10720           3 :         struct spdk_bdev_io *parent_io = cb_arg;
   10721             : 
   10722           3 :         spdk_bdev_free_io(bdev_io);
   10723             : 
   10724             :         /* Check return status of read */
   10725           3 :         if (!success) {
   10726           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10727           0 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
   10728           0 :                 return;
   10729             :         }
   10730             : 
   10731             :         /* Do write */
   10732           3 :         bdev_copy_do_write(parent_io);
   10733           3 : }
   10734             : 
   10735             : static void
   10736           3 : bdev_copy_do_read(void *_bdev_io)
   10737             : {
   10738           3 :         struct spdk_bdev_io *bdev_io = _bdev_io;
   10739             :         int rc;
   10740             : 
   10741             :         /* Read blocks */
   10742           6 :         rc = spdk_bdev_read_blocks_with_md(bdev_io->internal.desc,
   10743           3 :                                            spdk_io_channel_from_ctx(bdev_io->internal.ch),
   10744           3 :                                            bdev_io->u.bdev.iovs[0].iov_base,
   10745           3 :                                            bdev_io->u.bdev.md_buf, bdev_io->u.bdev.copy.src_offset_blocks,
   10746           3 :                                            bdev_io->u.bdev.num_blocks, bdev_copy_do_read_done, bdev_io);
   10747             : 
   10748           3 :         if (rc == -ENOMEM) {
   10749           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_copy_do_read);
   10750           3 :         } else if (rc != 0) {
   10751           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10752           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10753           0 :         }
   10754           3 : }
   10755             : 
   10756             : static void
   10757           3 : bdev_copy_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io, bool success)
   10758             : {
   10759           3 :         if (!success) {
   10760           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10761           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10762           0 :                 return;
   10763             :         }
   10764             : 
   10765           3 :         bdev_copy_do_read(bdev_io);
   10766           3 : }
   10767             : 
   10768             : int
   10769          27 : spdk_bdev_copy_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
   10770             :                       uint64_t dst_offset_blocks, uint64_t src_offset_blocks, uint64_t num_blocks,
   10771             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
   10772             : {
   10773          27 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10774             :         struct spdk_bdev_io *bdev_io;
   10775          27 :         struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
   10776             : 
   10777          27 :         if (!desc->write) {
   10778           0 :                 return -EBADF;
   10779             :         }
   10780             : 
   10781          27 :         if (!bdev_io_valid_blocks(bdev, dst_offset_blocks, num_blocks) ||
   10782          27 :             !bdev_io_valid_blocks(bdev, src_offset_blocks, num_blocks)) {
   10783           0 :                 SPDK_DEBUGLOG(bdev,
   10784             :                               "Invalid offset or number of blocks: dst %lu, src %lu, count %lu\n",
   10785             :                               dst_offset_blocks, src_offset_blocks, num_blocks);
   10786           0 :                 return -EINVAL;
   10787             :         }
   10788             : 
   10789          27 :         bdev_io = bdev_channel_get_io(channel);
   10790          27 :         if (!bdev_io) {
   10791           0 :                 return -ENOMEM;
   10792             :         }
   10793             : 
   10794          27 :         bdev_io->internal.ch = channel;
   10795          27 :         bdev_io->internal.desc = desc;
   10796          27 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COPY;
   10797             : 
   10798          27 :         bdev_io->u.bdev.offset_blocks = dst_offset_blocks;
   10799          27 :         bdev_io->u.bdev.copy.src_offset_blocks = src_offset_blocks;
   10800          27 :         bdev_io->u.bdev.num_blocks = num_blocks;
   10801          27 :         bdev_io->u.bdev.memory_domain = NULL;
   10802          27 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
   10803          27 :         bdev_io->u.bdev.iovs = NULL;
   10804          27 :         bdev_io->u.bdev.iovcnt = 0;
   10805          27 :         bdev_io->u.bdev.md_buf = NULL;
   10806          27 :         bdev_io->u.bdev.accel_sequence = NULL;
   10807          27 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
   10808             : 
   10809          27 :         if (dst_offset_blocks == src_offset_blocks || num_blocks == 0) {
   10810           0 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_io_complete_cb, bdev_io);
   10811           0 :                 return 0;
   10812             :         }
   10813             : 
   10814             : 
   10815             :         /* If the copy size is large and should be split, use the generic split logic
   10816             :          * regardless of whether SPDK_BDEV_IO_TYPE_COPY is supported or not.
   10817             :          *
   10818             :          * Then, send the copy request if SPDK_BDEV_IO_TYPE_COPY is supported or
   10819             :          * emulate it using regular read and write requests otherwise.
   10820             :          */
   10821          27 :         if (spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COPY) ||
   10822           4 :             bdev_io->internal.f.split) {
   10823          24 :                 bdev_io_submit(bdev_io);
   10824          24 :                 return 0;
   10825             :         }
   10826             : 
   10827           3 :         spdk_bdev_io_get_buf(bdev_io, bdev_copy_get_buf_cb, num_blocks * spdk_bdev_get_block_size(bdev));
   10828             : 
   10829           3 :         return 0;
   10830          27 : }
   10831             : 
   10832           3 : SPDK_LOG_REGISTER_COMPONENT(bdev)
   10833             : 
   10834             : static void
   10835           0 : bdev_trace(void)
   10836             : {
   10837           0 :         struct spdk_trace_tpoint_opts opts[] = {
   10838             :                 {
   10839             :                         "BDEV_IO_START", TRACE_BDEV_IO_START,
   10840             :                         OWNER_TYPE_BDEV, OBJECT_BDEV_IO, 1,
   10841             :                         {
   10842             :                                 { "type", SPDK_TRACE_ARG_TYPE_INT, 8 },
   10843             :                                 { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
   10844             :                                 { "offset", SPDK_TRACE_ARG_TYPE_INT, 8 },
   10845             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
   10846             :                         }
   10847             :                 },
   10848             :                 {
   10849             :                         "BDEV_IO_DONE", TRACE_BDEV_IO_DONE,
   10850             :                         OWNER_TYPE_BDEV, OBJECT_BDEV_IO, 0,
   10851             :                         {
   10852             :                                 { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
   10853             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
   10854             :                         }
   10855             :                 },
   10856             :                 {
   10857             :                         "BDEV_IOCH_CREATE", TRACE_BDEV_IOCH_CREATE,
   10858             :                         OWNER_TYPE_BDEV, OBJECT_NONE, 0,
   10859             :                         {
   10860             :                                 { "tid", SPDK_TRACE_ARG_TYPE_INT, 8 }
   10861             :                         }
   10862             :                 },
   10863             :                 {
   10864             :                         "BDEV_IOCH_DESTROY", TRACE_BDEV_IOCH_DESTROY,
   10865             :                         OWNER_TYPE_BDEV, OBJECT_NONE, 0,
   10866             :                         {
   10867             :                                 { "tid", SPDK_TRACE_ARG_TYPE_INT, 8 }
   10868             :                         }
   10869             :                 },
   10870             :         };
   10871             : 
   10872             : 
   10873           0 :         spdk_trace_register_owner_type(OWNER_TYPE_BDEV, 'b');
   10874           0 :         spdk_trace_register_object(OBJECT_BDEV_IO, 'i');
   10875           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
   10876           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_NVME_IO_START, OBJECT_BDEV_IO, 0);
   10877           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_NVME_IO_DONE, OBJECT_BDEV_IO, 0);
   10878           0 :         spdk_trace_tpoint_register_relation(TRACE_BLOB_REQ_SET_START, OBJECT_BDEV_IO, 0);
   10879           0 :         spdk_trace_tpoint_register_relation(TRACE_BLOB_REQ_SET_COMPLETE, OBJECT_BDEV_IO, 0);
   10880           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_RAID_IO_START, OBJECT_BDEV_IO, 0);
   10881           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_RAID_IO_DONE, OBJECT_BDEV_IO, 0);
   10882           0 : }
   10883           3 : SPDK_TRACE_REGISTER_FN(bdev_trace, "bdev", TRACE_GROUP_BDEV)

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