LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 3586 5007 71.6 %
Date: 2024-11-20 14:08:56 Functions: 354 455 77.8 %

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

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