LCOV - code coverage report
Current view: top level - lib/nvmf - nvmf.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 118 1073 11.0 %
Date: 2024-12-12 09:07:01 Functions: 7 66 10.6 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2018-2019, 2021 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             : #include "spdk/bit_array.h"
      11             : #include "spdk/thread.h"
      12             : #include "spdk/nvmf.h"
      13             : #include "spdk/endian.h"
      14             : #include "spdk/string.h"
      15             : #include "spdk/log.h"
      16             : #include "spdk_internal/usdt.h"
      17             : 
      18             : #include "nvmf_internal.h"
      19             : #include "transport.h"
      20             : 
      21           1 : SPDK_LOG_REGISTER_COMPONENT(nvmf)
      22             : 
      23             : #define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024
      24             : 
      25             : static TAILQ_HEAD(, spdk_nvmf_tgt) g_nvmf_tgts = TAILQ_HEAD_INITIALIZER(g_nvmf_tgts);
      26             : 
      27             : typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status);
      28             : 
      29             : /* supplied to a single call to nvmf_qpair_disconnect */
      30             : struct nvmf_qpair_disconnect_ctx {
      31             :         struct spdk_nvmf_qpair *qpair;
      32             :         struct spdk_nvmf_ctrlr *ctrlr;
      33             :         uint16_t qid;
      34             : };
      35             : 
      36             : /*
      37             :  * There are several times when we need to iterate through the list of all qpairs and selectively delete them.
      38             :  * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from
      39             :  * to enable calling nvmf_qpair_disconnect on the next desired qpair.
      40             :  */
      41             : struct nvmf_qpair_disconnect_many_ctx {
      42             :         struct spdk_nvmf_subsystem *subsystem;
      43             :         struct spdk_nvmf_poll_group *group;
      44             :         spdk_nvmf_poll_group_mod_done cpl_fn;
      45             :         void *cpl_ctx;
      46             : };
      47             : 
      48             : static struct spdk_nvmf_referral *
      49           0 : nvmf_tgt_find_referral(struct spdk_nvmf_tgt *tgt,
      50             :                        const struct spdk_nvme_transport_id *trid)
      51             : {
      52             :         struct spdk_nvmf_referral *referral;
      53             : 
      54           0 :         TAILQ_FOREACH(referral, &tgt->referrals, link) {
      55           0 :                 if (spdk_nvme_transport_id_compare(&referral->trid, trid) == 0) {
      56           0 :                         return referral;
      57             :                 }
      58           0 :         }
      59             : 
      60           0 :         return NULL;
      61           0 : }
      62             : 
      63             : int
      64           0 : spdk_nvmf_tgt_add_referral(struct spdk_nvmf_tgt *tgt,
      65             :                            const struct spdk_nvmf_referral_opts *uopts)
      66             : {
      67             :         struct spdk_nvmf_referral *referral;
      68           0 :         struct spdk_nvmf_referral_opts opts = {};
      69           0 :         struct spdk_nvme_transport_id *trid = &opts.trid;
      70             : 
      71           0 :         memcpy(&opts, uopts, spdk_min(uopts->size, sizeof(opts)));
      72           0 :         if (trid->subnqn[0] == '\0') {
      73           0 :                 snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
      74           0 :         }
      75             : 
      76           0 :         if (!nvmf_nqn_is_valid(trid->subnqn)) {
      77           0 :                 SPDK_ERRLOG("Invalid subsystem NQN\n");
      78           0 :                 return -EINVAL;
      79             :         }
      80             : 
      81             :         /* If the entry already exists, just ignore it. */
      82           0 :         if (nvmf_tgt_find_referral(tgt, trid)) {
      83           0 :                 return 0;
      84             :         }
      85             : 
      86           0 :         referral = calloc(1, sizeof(*referral));
      87           0 :         if (!referral) {
      88           0 :                 SPDK_ERRLOG("Failed to allocate memory for a referral\n");
      89           0 :                 return -ENOMEM;
      90             :         }
      91             : 
      92           0 :         referral->entry.subtype = nvmf_nqn_is_discovery(trid->subnqn) ?
      93             :                                   SPDK_NVMF_SUBTYPE_DISCOVERY :
      94             :                                   SPDK_NVMF_SUBTYPE_NVME;
      95           0 :         referral->entry.treq.secure_channel = opts.secure_channel ?
      96             :                                               SPDK_NVMF_TREQ_SECURE_CHANNEL_REQUIRED :
      97             :                                               SPDK_NVMF_TREQ_SECURE_CHANNEL_NOT_REQUIRED;
      98           0 :         referral->entry.cntlid = 0xffff;
      99           0 :         referral->entry.trtype = trid->trtype;
     100           0 :         referral->entry.adrfam = trid->adrfam;
     101           0 :         referral->allow_any_host = opts.allow_any_host;
     102           0 :         memcpy(&referral->trid, trid, sizeof(struct spdk_nvme_transport_id));
     103           0 :         spdk_strcpy_pad(referral->entry.subnqn, trid->subnqn, sizeof(trid->subnqn), '\0');
     104           0 :         spdk_strcpy_pad(referral->entry.trsvcid, trid->trsvcid, sizeof(referral->entry.trsvcid), ' ');
     105           0 :         spdk_strcpy_pad(referral->entry.traddr, trid->traddr, sizeof(referral->entry.traddr), ' ');
     106             : 
     107           0 :         TAILQ_INSERT_HEAD(&tgt->referrals, referral, link);
     108           0 :         spdk_nvmf_send_discovery_log_notice(tgt, NULL);
     109             : 
     110           0 :         return 0;
     111           0 : }
     112             : 
     113             : int
     114           0 : spdk_nvmf_tgt_remove_referral(struct spdk_nvmf_tgt *tgt,
     115             :                               const struct spdk_nvmf_referral_opts *uopts)
     116             : {
     117             :         struct spdk_nvmf_referral *referral;
     118           0 :         struct spdk_nvmf_referral_opts opts = {};
     119           0 :         struct spdk_nvme_transport_id *trid = &opts.trid;
     120             : 
     121           0 :         memcpy(&opts, uopts, spdk_min(uopts->size, sizeof(opts)));
     122           0 :         if (trid->subnqn[0] == '\0') {
     123           0 :                 snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
     124           0 :         }
     125             : 
     126           0 :         referral = nvmf_tgt_find_referral(tgt, &opts.trid);
     127           0 :         if (referral == NULL) {
     128           0 :                 return -ENOENT;
     129             :         }
     130             : 
     131           0 :         TAILQ_REMOVE(&tgt->referrals, referral, link);
     132           0 :         spdk_nvmf_send_discovery_log_notice(tgt, NULL);
     133             : 
     134           0 :         free(referral);
     135             : 
     136           0 :         return 0;
     137           0 : }
     138             : 
     139             : void
     140           0 : nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair,
     141             :                      enum spdk_nvmf_qpair_state state)
     142             : {
     143           0 :         assert(qpair != NULL);
     144           0 :         assert(qpair->group->thread == spdk_get_thread());
     145             : 
     146           0 :         qpair->state = state;
     147           0 : }
     148             : 
     149             : /*
     150             :  * Reset and clean up the poll group (I/O channel code will actually free the
     151             :  * group).
     152             :  */
     153             : static void
     154           1 : nvmf_tgt_cleanup_poll_group(struct spdk_nvmf_poll_group *group)
     155             : {
     156             :         struct spdk_nvmf_transport_poll_group *tgroup, *tmp;
     157             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
     158             :         uint32_t sid, nsid;
     159             : 
     160           2 :         TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) {
     161           1 :                 TAILQ_REMOVE(&group->tgroups, tgroup, link);
     162           1 :                 nvmf_transport_poll_group_destroy(tgroup);
     163           1 :         }
     164             : 
     165           2 :         for (sid = 0; sid < group->num_sgroups; sid++) {
     166           1 :                 sgroup = &group->sgroups[sid];
     167             : 
     168           1 :                 assert(sgroup != NULL);
     169             : 
     170           2 :                 for (nsid = 0; nsid < sgroup->num_ns; nsid++) {
     171           1 :                         if (sgroup->ns_info[nsid].channel) {
     172           1 :                                 spdk_put_io_channel(sgroup->ns_info[nsid].channel);
     173           1 :                                 sgroup->ns_info[nsid].channel = NULL;
     174           1 :                         }
     175           1 :                 }
     176             : 
     177           1 :                 free(sgroup->ns_info);
     178           1 :         }
     179             : 
     180           1 :         free(group->sgroups);
     181             : 
     182           1 :         if (group->destroy_cb_fn) {
     183           0 :                 group->destroy_cb_fn(group->destroy_cb_arg, 0);
     184           0 :         }
     185           1 : }
     186             : 
     187             : /*
     188             :  * Callback to unregister a poll group from the target, and clean up its state.
     189             :  */
     190             : static void
     191           1 : nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf)
     192             : {
     193           1 :         struct spdk_nvmf_tgt *tgt = io_device;
     194           1 :         struct spdk_nvmf_poll_group *group = ctx_buf;
     195             : 
     196             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group, spdk_thread_get_id(group->thread));
     197             : 
     198           1 :         pthread_mutex_lock(&tgt->mutex);
     199           1 :         TAILQ_REMOVE(&tgt->poll_groups, group, link);
     200           1 :         tgt->num_poll_groups--;
     201           1 :         pthread_mutex_unlock(&tgt->mutex);
     202             : 
     203           1 :         assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING));
     204           1 :         nvmf_tgt_cleanup_poll_group(group);
     205           1 : }
     206             : 
     207             : static int
     208           1 : nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group,
     209             :                               struct spdk_nvmf_transport *transport)
     210             : {
     211           1 :         struct spdk_nvmf_transport_poll_group *tgroup = nvmf_get_transport_poll_group(group, transport);
     212             : 
     213           1 :         if (tgroup != NULL) {
     214             :                 /* Transport already in the poll group */
     215           0 :                 return 0;
     216             :         }
     217             : 
     218           1 :         tgroup = nvmf_transport_poll_group_create(transport, group);
     219           1 :         if (!tgroup) {
     220           0 :                 SPDK_ERRLOG("Unable to create poll group for transport\n");
     221           0 :                 return -1;
     222             :         }
     223             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_transport_poll_group_create, transport,
     224             :                                  spdk_thread_get_id(group->thread));
     225             : 
     226           1 :         tgroup->group = group;
     227           1 :         TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link);
     228             : 
     229           1 :         return 0;
     230           1 : }
     231             : 
     232             : static int
     233           1 : nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf)
     234             : {
     235           1 :         struct spdk_nvmf_tgt *tgt = io_device;
     236           1 :         struct spdk_nvmf_poll_group *group = ctx_buf;
     237             :         struct spdk_nvmf_transport *transport;
     238             :         struct spdk_nvmf_subsystem *subsystem;
     239           1 :         struct spdk_thread *thread = spdk_get_thread();
     240             :         uint32_t i;
     241             :         int rc;
     242             : 
     243           1 :         group->tgt = tgt;
     244           1 :         TAILQ_INIT(&group->tgroups);
     245           1 :         TAILQ_INIT(&group->qpairs);
     246           1 :         group->thread = thread;
     247           1 :         pthread_mutex_init(&group->mutex, NULL);
     248             : 
     249             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_create_poll_group, spdk_thread_get_id(thread));
     250             : 
     251           2 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
     252           1 :                 rc = nvmf_poll_group_add_transport(group, transport);
     253           1 :                 if (rc != 0) {
     254           0 :                         nvmf_tgt_cleanup_poll_group(group);
     255           0 :                         return rc;
     256             :                 }
     257           1 :         }
     258             : 
     259           1 :         group->num_sgroups = tgt->max_subsystems;
     260           1 :         group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group));
     261           1 :         if (!group->sgroups) {
     262           0 :                 nvmf_tgt_cleanup_poll_group(group);
     263           0 :                 return -ENOMEM;
     264             :         }
     265             : 
     266           2 :         for (i = 0; i < tgt->max_subsystems; i++) {
     267           1 :                 TAILQ_INIT(&group->sgroups[i].queued);
     268           1 :         }
     269             : 
     270           2 :         for (subsystem = spdk_nvmf_subsystem_get_first(tgt);
     271           2 :              subsystem != NULL;
     272           1 :              subsystem = spdk_nvmf_subsystem_get_next(subsystem)) {
     273           1 :                 if (nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) {
     274           0 :                         nvmf_tgt_cleanup_poll_group(group);
     275           0 :                         return -1;
     276             :                 }
     277           1 :         }
     278             : 
     279           1 :         pthread_mutex_lock(&tgt->mutex);
     280           1 :         tgt->num_poll_groups++;
     281           1 :         TAILQ_INSERT_TAIL(&tgt->poll_groups, group, link);
     282           1 :         pthread_mutex_unlock(&tgt->mutex);
     283             : 
     284           1 :         return 0;
     285           1 : }
     286             : 
     287             : static void
     288           0 : _nvmf_tgt_disconnect_qpairs(void *ctx)
     289             : {
     290             :         struct spdk_nvmf_qpair *qpair, *qpair_tmp;
     291           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
     292           0 :         struct spdk_nvmf_poll_group *group = qpair_ctx->group;
     293             :         struct spdk_io_channel *ch;
     294             :         int rc;
     295             : 
     296           0 :         TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) {
     297           0 :                 rc = spdk_nvmf_qpair_disconnect(qpair);
     298           0 :                 if (rc && rc != -EINPROGRESS) {
     299           0 :                         break;
     300             :                 }
     301           0 :         }
     302             : 
     303           0 :         if (TAILQ_EMPTY(&group->qpairs)) {
     304             :                 /* When the refcount from the channels reaches 0, nvmf_tgt_destroy_poll_group will be called. */
     305           0 :                 ch = spdk_io_channel_from_ctx(group);
     306           0 :                 spdk_put_io_channel(ch);
     307           0 :                 free(qpair_ctx);
     308           0 :                 return;
     309             :         }
     310             : 
     311             :         /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */
     312           0 :         spdk_thread_send_msg(spdk_get_thread(), _nvmf_tgt_disconnect_qpairs, ctx);
     313           0 : }
     314             : 
     315             : static void
     316           0 : nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group)
     317             : {
     318             :         struct nvmf_qpair_disconnect_many_ctx *ctx;
     319             : 
     320             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group_qpairs, spdk_thread_get_id(group->thread));
     321             : 
     322           0 :         ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx));
     323           0 :         if (!ctx) {
     324           0 :                 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n");
     325           0 :                 return;
     326             :         }
     327             : 
     328           0 :         ctx->group = group;
     329           0 :         _nvmf_tgt_disconnect_qpairs(ctx);
     330           0 : }
     331             : 
     332             : struct spdk_nvmf_tgt *
     333           0 : spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *_opts)
     334             : {
     335             :         struct spdk_nvmf_tgt *tgt, *tmp_tgt;
     336           0 :         struct spdk_nvmf_target_opts opts = {
     337             :                 .max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS,
     338             :                 .discovery_filter = SPDK_NVMF_TGT_DISCOVERY_MATCH_ANY,
     339             :         };
     340             : 
     341           0 :         memcpy(&opts, _opts, _opts->size);
     342           0 :         if (strnlen(opts.name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) {
     343           0 :                 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH);
     344           0 :                 return NULL;
     345             :         }
     346             : 
     347           0 :         TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) {
     348           0 :                 if (!strncmp(opts.name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) {
     349           0 :                         SPDK_ERRLOG("Provided target name must be unique.\n");
     350           0 :                         return NULL;
     351             :                 }
     352           0 :         }
     353             : 
     354           0 :         tgt = calloc(1, sizeof(*tgt));
     355           0 :         if (!tgt) {
     356           0 :                 return NULL;
     357             :         }
     358             : 
     359           0 :         snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts.name);
     360             : 
     361           0 :         if (!opts.max_subsystems) {
     362           0 :                 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS;
     363           0 :         } else {
     364           0 :                 tgt->max_subsystems = opts.max_subsystems;
     365             :         }
     366             : 
     367           0 :         tgt->crdt[0] = opts.crdt[0];
     368           0 :         tgt->crdt[1] = opts.crdt[1];
     369           0 :         tgt->crdt[2] = opts.crdt[2];
     370           0 :         tgt->discovery_filter = opts.discovery_filter;
     371           0 :         tgt->discovery_genctr = 0;
     372           0 :         tgt->dhchap_digests = opts.dhchap_digests;
     373           0 :         tgt->dhchap_dhgroups = opts.dhchap_dhgroups;
     374           0 :         TAILQ_INIT(&tgt->transports);
     375           0 :         TAILQ_INIT(&tgt->poll_groups);
     376           0 :         TAILQ_INIT(&tgt->referrals);
     377           0 :         tgt->num_poll_groups = 0;
     378             : 
     379           0 :         tgt->subsystem_ids = spdk_bit_array_create(tgt->max_subsystems);
     380           0 :         if (tgt->subsystem_ids == NULL) {
     381           0 :                 free(tgt);
     382           0 :                 return NULL;
     383             :         }
     384             : 
     385           0 :         RB_INIT(&tgt->subsystems);
     386             : 
     387           0 :         pthread_mutex_init(&tgt->mutex, NULL);
     388             : 
     389           0 :         spdk_io_device_register(tgt,
     390             :                                 nvmf_tgt_create_poll_group,
     391             :                                 nvmf_tgt_destroy_poll_group,
     392             :                                 sizeof(struct spdk_nvmf_poll_group),
     393           0 :                                 tgt->name);
     394             : 
     395           0 :         tgt->state = NVMF_TGT_RUNNING;
     396             : 
     397           0 :         TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link);
     398             : 
     399           0 :         return tgt;
     400           0 : }
     401             : 
     402             : static void
     403           0 : _nvmf_tgt_destroy_next_transport(void *ctx)
     404             : {
     405           0 :         struct spdk_nvmf_tgt *tgt = ctx;
     406             :         struct spdk_nvmf_transport *transport;
     407             : 
     408           0 :         if (!TAILQ_EMPTY(&tgt->transports)) {
     409           0 :                 transport = TAILQ_FIRST(&tgt->transports);
     410           0 :                 TAILQ_REMOVE(&tgt->transports, transport, link);
     411           0 :                 spdk_nvmf_transport_destroy(transport, _nvmf_tgt_destroy_next_transport, tgt);
     412           0 :         } else {
     413           0 :                 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn = tgt->destroy_cb_fn;
     414           0 :                 void *destroy_cb_arg = tgt->destroy_cb_arg;
     415             : 
     416           0 :                 pthread_mutex_destroy(&tgt->mutex);
     417           0 :                 free(tgt);
     418             : 
     419           0 :                 if (destroy_cb_fn) {
     420           0 :                         destroy_cb_fn(destroy_cb_arg, 0);
     421           0 :                 }
     422             :         }
     423           0 : }
     424             : 
     425             : static void
     426           0 : nvmf_tgt_destroy_cb(void *io_device)
     427             : {
     428           0 :         struct spdk_nvmf_tgt *tgt = io_device;
     429             :         struct spdk_nvmf_subsystem *subsystem, *subsystem_next;
     430             :         int rc;
     431             :         struct spdk_nvmf_referral *referral;
     432             : 
     433           0 :         while ((referral = TAILQ_FIRST(&tgt->referrals))) {
     434           0 :                 TAILQ_REMOVE(&tgt->referrals, referral, link);
     435           0 :                 free(referral);
     436             :         }
     437             : 
     438           0 :         nvmf_tgt_stop_mdns_prr(tgt);
     439             : 
     440             :         /* We will be freeing subsystems in this loop, so we always need to get the next one
     441             :          * ahead of time, since we can't call get_next() on a subsystem that's been freed.
     442             :          */
     443           0 :         for (subsystem = spdk_nvmf_subsystem_get_first(tgt),
     444           0 :              subsystem_next = spdk_nvmf_subsystem_get_next(subsystem);
     445           0 :              subsystem != NULL;
     446           0 :              subsystem = subsystem_next,
     447           0 :              subsystem_next = spdk_nvmf_subsystem_get_next(subsystem_next)) {
     448           0 :                 nvmf_subsystem_remove_all_listeners(subsystem, true);
     449             : 
     450           0 :                 rc = spdk_nvmf_subsystem_destroy(subsystem, nvmf_tgt_destroy_cb, tgt);
     451           0 :                 if (rc) {
     452           0 :                         if (rc == -EINPROGRESS) {
     453             :                                 /* If rc is -EINPROGRESS, nvmf_tgt_destroy_cb will be called again when subsystem #i
     454             :                                  * is destroyed, nvmf_tgt_destroy_cb will continue to destroy other subsystems if any */
     455           0 :                                 return;
     456             :                         } else {
     457           0 :                                 SPDK_ERRLOG("Failed to destroy subsystem %s, rc %d\n", subsystem->subnqn, rc);
     458             :                         }
     459           0 :                 }
     460           0 :         }
     461           0 :         spdk_bit_array_free(&tgt->subsystem_ids);
     462           0 :         _nvmf_tgt_destroy_next_transport(tgt);
     463           0 : }
     464             : 
     465             : void
     466           0 : spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt,
     467             :                       spdk_nvmf_tgt_destroy_done_fn cb_fn,
     468             :                       void *cb_arg)
     469             : {
     470           0 :         assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING));
     471             : 
     472           0 :         tgt->destroy_cb_fn = cb_fn;
     473           0 :         tgt->destroy_cb_arg = cb_arg;
     474             : 
     475           0 :         TAILQ_REMOVE(&g_nvmf_tgts, tgt, link);
     476             : 
     477           0 :         spdk_io_device_unregister(tgt, nvmf_tgt_destroy_cb);
     478           0 : }
     479             : 
     480             : const char *
     481           0 : spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt)
     482             : {
     483           0 :         return tgt->name;
     484             : }
     485             : 
     486             : struct spdk_nvmf_tgt *
     487           0 : spdk_nvmf_get_tgt(const char *name)
     488             : {
     489             :         struct spdk_nvmf_tgt *tgt;
     490           0 :         uint32_t num_targets = 0;
     491             : 
     492           0 :         TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) {
     493           0 :                 if (name) {
     494           0 :                         if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) {
     495           0 :                                 return tgt;
     496             :                         }
     497           0 :                 }
     498           0 :                 num_targets++;
     499           0 :         }
     500             : 
     501             :         /*
     502             :          * special case. If there is only one target and
     503             :          * no name was specified, return the only available
     504             :          * target. If there is more than one target, name must
     505             :          * be specified.
     506             :          */
     507           0 :         if (!name && num_targets == 1) {
     508           0 :                 return TAILQ_FIRST(&g_nvmf_tgts);
     509             :         }
     510             : 
     511           0 :         return NULL;
     512           0 : }
     513             : 
     514             : struct spdk_nvmf_tgt *
     515           0 : spdk_nvmf_get_first_tgt(void)
     516             : {
     517           0 :         return TAILQ_FIRST(&g_nvmf_tgts);
     518             : }
     519             : 
     520             : struct spdk_nvmf_tgt *
     521           0 : spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev)
     522             : {
     523           0 :         return TAILQ_NEXT(prev, link);
     524             : }
     525             : 
     526             : static void
     527           0 : nvmf_write_nvme_subsystem_config(struct spdk_json_write_ctx *w,
     528             :                                  struct spdk_nvmf_subsystem *subsystem)
     529             : {
     530             :         struct spdk_nvmf_host *host;
     531             :         struct spdk_nvmf_ns *ns;
     532             :         struct spdk_nvmf_ns_opts ns_opts;
     533             :         uint32_t max_namespaces;
     534             :         struct spdk_nvmf_transport *transport;
     535             : 
     536           0 :         assert(spdk_nvmf_subsystem_get_type(subsystem) == SPDK_NVMF_SUBTYPE_NVME);
     537             : 
     538             :         /* { */
     539           0 :         spdk_json_write_object_begin(w);
     540           0 :         spdk_json_write_named_string(w, "method", "nvmf_create_subsystem");
     541             : 
     542             :         /*     "params" : { */
     543           0 :         spdk_json_write_named_object_begin(w, "params");
     544           0 :         spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     545           0 :         spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem));
     546           0 :         spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem));
     547           0 :         spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem));
     548             : 
     549           0 :         max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem);
     550           0 :         if (max_namespaces != 0) {
     551           0 :                 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces);
     552           0 :         }
     553             : 
     554           0 :         spdk_json_write_named_uint32(w, "min_cntlid", spdk_nvmf_subsystem_get_min_cntlid(subsystem));
     555           0 :         spdk_json_write_named_uint32(w, "max_cntlid", spdk_nvmf_subsystem_get_max_cntlid(subsystem));
     556           0 :         spdk_json_write_named_bool(w, "ana_reporting", spdk_nvmf_subsystem_get_ana_reporting(subsystem));
     557             : 
     558             :         /*     } "params" */
     559           0 :         spdk_json_write_object_end(w);
     560             : 
     561             :         /* } */
     562           0 :         spdk_json_write_object_end(w);
     563             : 
     564           0 :         for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL;
     565           0 :              host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) {
     566             : 
     567           0 :                 spdk_json_write_object_begin(w);
     568           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host");
     569             : 
     570             :                 /*     "params" : { */
     571           0 :                 spdk_json_write_named_object_begin(w, "params");
     572             : 
     573           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     574           0 :                 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host));
     575           0 :                 if (host->dhchap_key != NULL) {
     576           0 :                         spdk_json_write_named_string(w, "dhchap_key",
     577           0 :                                                      spdk_key_get_name(host->dhchap_key));
     578           0 :                 }
     579           0 :                 if (host->dhchap_ctrlr_key != NULL) {
     580           0 :                         spdk_json_write_named_string(w, "dhchap_ctrlr_key",
     581           0 :                                                      spdk_key_get_name(host->dhchap_ctrlr_key));
     582           0 :                 }
     583           0 :                 TAILQ_FOREACH(transport, &subsystem->tgt->transports, link) {
     584           0 :                         if (transport->ops->subsystem_dump_host != NULL) {
     585           0 :                                 transport->ops->subsystem_dump_host(transport, subsystem, host->nqn, w);
     586           0 :                         }
     587           0 :                 }
     588             : 
     589             :                 /*     } "params" */
     590           0 :                 spdk_json_write_object_end(w);
     591             : 
     592             :                 /* } */
     593           0 :                 spdk_json_write_object_end(w);
     594           0 :         }
     595             : 
     596           0 :         for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL;
     597           0 :              ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) {
     598           0 :                 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts));
     599             : 
     600           0 :                 spdk_json_write_object_begin(w);
     601           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns");
     602             : 
     603             :                 /*     "params" : { */
     604           0 :                 spdk_json_write_named_object_begin(w, "params");
     605             : 
     606           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     607             : 
     608             :                 /*     "namespace" : { */
     609           0 :                 spdk_json_write_named_object_begin(w, "namespace");
     610             : 
     611           0 :                 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns));
     612           0 :                 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns)));
     613             : 
     614           0 :                 if (ns->ptpl_file != NULL) {
     615           0 :                         spdk_json_write_named_string(w, "ptpl_file", ns->ptpl_file);
     616           0 :                 }
     617             : 
     618           0 :                 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) {
     619             :                         SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch");
     620           0 :                         spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]),
     621           0 :                                                          from_be64(&ns_opts.nguid[8]));
     622           0 :                 }
     623             : 
     624           0 :                 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) {
     625             :                         SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch");
     626           0 :                         spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64));
     627           0 :                 }
     628             : 
     629           0 :                 if (!spdk_uuid_is_null(&ns_opts.uuid)) {
     630           0 :                         spdk_json_write_named_uuid(w, "uuid",  &ns_opts.uuid);
     631           0 :                 }
     632             : 
     633           0 :                 if (spdk_nvmf_subsystem_get_ana_reporting(subsystem)) {
     634           0 :                         spdk_json_write_named_uint32(w, "anagrpid", ns_opts.anagrpid);
     635           0 :                 }
     636             : 
     637           0 :                 spdk_json_write_named_bool(w, "no_auto_visible", !ns->always_visible);
     638             : 
     639             :                 /*     "namespace" */
     640           0 :                 spdk_json_write_object_end(w);
     641             : 
     642             :                 /*     } "params" */
     643           0 :                 spdk_json_write_object_end(w);
     644             : 
     645             :                 /* } */
     646           0 :                 spdk_json_write_object_end(w);
     647             : 
     648           0 :                 TAILQ_FOREACH(host, &ns->hosts, link) {
     649           0 :                         spdk_json_write_object_begin(w);
     650           0 :                         spdk_json_write_named_string(w, "method", "nvmf_ns_add_host");
     651           0 :                         spdk_json_write_named_object_begin(w, "params");
     652           0 :                         spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     653           0 :                         spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns));
     654           0 :                         spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host));
     655           0 :                         spdk_json_write_object_end(w);
     656           0 :                         spdk_json_write_object_end(w);
     657           0 :                 }
     658           0 :         }
     659           0 : }
     660             : 
     661             : static void
     662           0 : nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w,
     663             :                                  struct spdk_nvmf_subsystem *subsystem)
     664             : {
     665             :         struct spdk_nvmf_subsystem_listener *listener;
     666             :         struct spdk_nvmf_transport *transport;
     667             :         const struct spdk_nvme_transport_id *trid;
     668             : 
     669           0 :         if (spdk_nvmf_subsystem_get_type(subsystem) == SPDK_NVMF_SUBTYPE_NVME) {
     670           0 :                 nvmf_write_nvme_subsystem_config(w, subsystem);
     671           0 :         }
     672             : 
     673           0 :         for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL;
     674           0 :              listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) {
     675           0 :                 transport = listener->transport;
     676           0 :                 trid = spdk_nvmf_subsystem_listener_get_trid(listener);
     677             : 
     678           0 :                 spdk_json_write_object_begin(w);
     679           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener");
     680             : 
     681             :                 /*     "params" : { */
     682           0 :                 spdk_json_write_named_object_begin(w, "params");
     683             : 
     684           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     685             : 
     686           0 :                 spdk_json_write_named_object_begin(w, "listen_address");
     687           0 :                 nvmf_transport_listen_dump_trid(trid, w);
     688           0 :                 spdk_json_write_object_end(w);
     689           0 :                 if (transport->ops->listen_dump_opts) {
     690           0 :                         transport->ops->listen_dump_opts(transport, trid, w);
     691           0 :                 }
     692             : 
     693           0 :                 spdk_json_write_named_bool(w, "secure_channel", listener->opts.secure_channel);
     694             : 
     695           0 :                 if (listener->opts.sock_impl) {
     696           0 :                         spdk_json_write_named_string(w, "sock_impl", listener->opts.sock_impl);
     697           0 :                 }
     698             : 
     699             :                 /*     } "params" */
     700           0 :                 spdk_json_write_object_end(w);
     701             : 
     702             :                 /* } */
     703           0 :                 spdk_json_write_object_end(w);
     704           0 :         }
     705           0 : }
     706             : 
     707             : void
     708           0 : spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt)
     709             : {
     710             :         struct spdk_nvmf_subsystem *subsystem;
     711             :         struct spdk_nvmf_transport *transport;
     712             :         struct spdk_nvmf_referral *referral;
     713             :         struct spdk_nvmf_host *host;
     714             : 
     715           0 :         spdk_json_write_object_begin(w);
     716           0 :         spdk_json_write_named_string(w, "method", "nvmf_set_max_subsystems");
     717             : 
     718           0 :         spdk_json_write_named_object_begin(w, "params");
     719           0 :         spdk_json_write_named_uint32(w, "max_subsystems", tgt->max_subsystems);
     720           0 :         spdk_json_write_object_end(w);
     721             : 
     722           0 :         spdk_json_write_object_end(w);
     723             : 
     724           0 :         spdk_json_write_object_begin(w);
     725           0 :         spdk_json_write_named_string(w, "method", "nvmf_set_crdt");
     726           0 :         spdk_json_write_named_object_begin(w, "params");
     727           0 :         spdk_json_write_named_uint32(w, "crdt1", tgt->crdt[0]);
     728           0 :         spdk_json_write_named_uint32(w, "crdt2", tgt->crdt[1]);
     729           0 :         spdk_json_write_named_uint32(w, "crdt3", tgt->crdt[2]);
     730           0 :         spdk_json_write_object_end(w);
     731           0 :         spdk_json_write_object_end(w);
     732             : 
     733             :         /* write transports */
     734           0 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
     735           0 :                 spdk_json_write_object_begin(w);
     736           0 :                 spdk_json_write_named_string(w, "method", "nvmf_create_transport");
     737           0 :                 nvmf_transport_dump_opts(transport, w, true);
     738           0 :                 spdk_json_write_object_end(w);
     739           0 :         }
     740             : 
     741           0 :         TAILQ_FOREACH(referral, &tgt->referrals, link) {
     742           0 :                 spdk_json_write_object_begin(w);
     743           0 :                 spdk_json_write_named_string(w, "method", "nvmf_discovery_add_referral");
     744             : 
     745           0 :                 spdk_json_write_named_object_begin(w, "params");
     746           0 :                 spdk_json_write_named_object_begin(w, "address");
     747           0 :                 nvmf_transport_listen_dump_trid(&referral->trid, w);
     748           0 :                 spdk_json_write_object_end(w);
     749           0 :                 spdk_json_write_named_bool(w, "secure_channel",
     750           0 :                                            referral->entry.treq.secure_channel ==
     751             :                                            SPDK_NVMF_TREQ_SECURE_CHANNEL_REQUIRED);
     752           0 :                 spdk_json_write_named_string(w, "subnqn", referral->trid.subnqn);
     753           0 :                 spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_referral_get_allow_any_host(referral));
     754           0 :                 spdk_json_write_object_end(w);
     755             : 
     756           0 :                 spdk_json_write_object_end(w);
     757             : 
     758           0 :                 for (host = spdk_nvmf_referral_get_first_host(referral); host != NULL;
     759           0 :                      host = spdk_nvmf_referral_get_next_host(referral, host)) {
     760             : 
     761           0 :                         spdk_json_write_object_begin(w);
     762           0 :                         spdk_json_write_named_string(w, "method", "nvmf_discovery_referral_add_host");
     763             : 
     764           0 :                         spdk_json_write_named_object_begin(w, "params");
     765             : 
     766           0 :                         spdk_json_write_named_string(w, "nqn", spdk_nvmf_referral_get_nqn(referral));
     767           0 :                         spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host));
     768             : 
     769           0 :                         spdk_json_write_object_end(w);
     770             : 
     771           0 :                         spdk_json_write_object_end(w);
     772           0 :                 }
     773           0 :         }
     774             : 
     775           0 :         subsystem = spdk_nvmf_subsystem_get_first(tgt);
     776           0 :         while (subsystem) {
     777           0 :                 nvmf_write_subsystem_config_json(w, subsystem);
     778           0 :                 subsystem = spdk_nvmf_subsystem_get_next(subsystem);
     779             :         }
     780           0 : }
     781             : 
     782             : static void
     783           0 : nvmf_listen_opts_copy(struct spdk_nvmf_listen_opts *opts,
     784             :                       const struct spdk_nvmf_listen_opts *opts_src, size_t opts_size)
     785             : {
     786           0 :         assert(opts);
     787           0 :         assert(opts_src);
     788             : 
     789           0 :         opts->opts_size = opts_size;
     790             : 
     791             : #define SET_FIELD(field) \
     792             :     if (offsetof(struct spdk_nvmf_listen_opts, field) + sizeof(opts->field) <= opts_size) { \
     793             :                  opts->field = opts_src->field; \
     794             :     } \
     795             : 
     796           0 :         SET_FIELD(transport_specific);
     797           0 :         SET_FIELD(secure_channel);
     798           0 :         SET_FIELD(ana_state);
     799           0 :         SET_FIELD(sock_impl);
     800             : #undef SET_FIELD
     801             : 
     802             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
     803             :          * and do not forget to add the SET_FIELD statement for your added field. */
     804             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_nvmf_listen_opts) == 32, "Incorrect size");
     805           0 : }
     806             : 
     807             : void
     808           0 : spdk_nvmf_listen_opts_init(struct spdk_nvmf_listen_opts *opts, size_t opts_size)
     809             : {
     810           0 :         struct spdk_nvmf_listen_opts opts_local = {};
     811             : 
     812             :         /* local version of opts should have defaults set here */
     813           0 :         opts_local.ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
     814           0 :         nvmf_listen_opts_copy(opts, &opts_local, opts_size);
     815           0 : }
     816             : 
     817             : int
     818           0 : spdk_nvmf_tgt_listen_ext(struct spdk_nvmf_tgt *tgt, const struct spdk_nvme_transport_id *trid,
     819             :                          struct spdk_nvmf_listen_opts *opts)
     820             : {
     821             :         struct spdk_nvmf_transport *transport;
     822             :         int rc;
     823           0 :         struct spdk_nvmf_listen_opts opts_local = {};
     824             : 
     825           0 :         if (!opts) {
     826           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
     827           0 :                 return -EINVAL;
     828             :         }
     829             : 
     830           0 :         if (!opts->opts_size) {
     831           0 :                 SPDK_ERRLOG("The opts_size in opts structure should not be zero\n");
     832           0 :                 return -EINVAL;
     833             :         }
     834             : 
     835           0 :         transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring);
     836           0 :         if (!transport) {
     837           0 :                 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n",
     838             :                             trid->trstring);
     839           0 :                 return -EINVAL;
     840             :         }
     841             : 
     842           0 :         nvmf_listen_opts_copy(&opts_local, opts, opts->opts_size);
     843           0 :         rc = spdk_nvmf_transport_listen(transport, trid, &opts_local);
     844           0 :         if (rc < 0) {
     845           0 :                 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr);
     846           0 :         }
     847             : 
     848           0 :         return rc;
     849           0 : }
     850             : 
     851             : int
     852           0 : spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt,
     853             :                           struct spdk_nvme_transport_id *trid)
     854             : {
     855             :         struct spdk_nvmf_transport *transport;
     856             :         int rc;
     857             : 
     858           0 :         transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring);
     859           0 :         if (!transport) {
     860           0 :                 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n",
     861             :                             trid->trstring);
     862           0 :                 return -EINVAL;
     863             :         }
     864             : 
     865           0 :         rc = spdk_nvmf_transport_stop_listen(transport, trid);
     866           0 :         if (rc < 0) {
     867           0 :                 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr);
     868           0 :                 return rc;
     869             :         }
     870           0 :         return 0;
     871           0 : }
     872             : 
     873             : struct spdk_nvmf_tgt_add_transport_ctx {
     874             :         struct spdk_nvmf_tgt *tgt;
     875             :         struct spdk_nvmf_transport *transport;
     876             :         spdk_nvmf_tgt_add_transport_done_fn cb_fn;
     877             :         void *cb_arg;
     878             :         int status;
     879             : };
     880             : 
     881             : static void
     882           0 : _nvmf_tgt_remove_transport_done(struct spdk_io_channel_iter *i, int status)
     883             : {
     884           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     885             : 
     886           0 :         ctx->cb_fn(ctx->cb_arg, ctx->status);
     887           0 :         free(ctx);
     888           0 : }
     889             : 
     890             : static void
     891           0 : _nvmf_tgt_remove_transport(struct spdk_io_channel_iter *i)
     892             : {
     893           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     894           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     895           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     896             :         struct spdk_nvmf_transport_poll_group *tgroup, *tmp;
     897             : 
     898           0 :         TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) {
     899           0 :                 if (tgroup->transport == ctx->transport) {
     900           0 :                         TAILQ_REMOVE(&group->tgroups, tgroup, link);
     901           0 :                         nvmf_transport_poll_group_destroy(tgroup);
     902           0 :                 }
     903           0 :         }
     904             : 
     905           0 :         spdk_for_each_channel_continue(i, 0);
     906           0 : }
     907             : 
     908             : static void
     909           0 : _nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status)
     910             : {
     911           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     912             : 
     913           0 :         if (status) {
     914           0 :                 ctx->status = status;
     915           0 :                 spdk_for_each_channel(ctx->tgt,
     916             :                                       _nvmf_tgt_remove_transport,
     917           0 :                                       ctx,
     918             :                                       _nvmf_tgt_remove_transport_done);
     919           0 :                 return;
     920             :         }
     921             : 
     922           0 :         ctx->transport->tgt = ctx->tgt;
     923           0 :         TAILQ_INSERT_TAIL(&ctx->tgt->transports, ctx->transport, link);
     924           0 :         ctx->cb_fn(ctx->cb_arg, status);
     925           0 :         free(ctx);
     926           0 : }
     927             : 
     928             : static void
     929           0 : _nvmf_tgt_add_transport(struct spdk_io_channel_iter *i)
     930             : {
     931           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     932           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     933           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     934             :         int rc;
     935             : 
     936           0 :         rc = nvmf_poll_group_add_transport(group, ctx->transport);
     937           0 :         spdk_for_each_channel_continue(i, rc);
     938           0 : }
     939             : 
     940             : void
     941           0 : spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt,
     942             :                             struct spdk_nvmf_transport *transport,
     943             :                             spdk_nvmf_tgt_add_transport_done_fn cb_fn,
     944             :                             void *cb_arg)
     945             : {
     946             :         struct spdk_nvmf_tgt_add_transport_ctx *ctx;
     947             : 
     948             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_add_transport, transport, tgt->name);
     949             : 
     950           0 :         if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) {
     951           0 :                 cb_fn(cb_arg, -EEXIST);
     952           0 :                 return; /* transport already created */
     953             :         }
     954             : 
     955           0 :         ctx = calloc(1, sizeof(*ctx));
     956           0 :         if (!ctx) {
     957           0 :                 cb_fn(cb_arg, -ENOMEM);
     958           0 :                 return;
     959             :         }
     960             : 
     961           0 :         ctx->tgt = tgt;
     962           0 :         ctx->transport = transport;
     963           0 :         ctx->cb_fn = cb_fn;
     964           0 :         ctx->cb_arg = cb_arg;
     965             : 
     966           0 :         spdk_for_each_channel(tgt,
     967             :                               _nvmf_tgt_add_transport,
     968           0 :                               ctx,
     969             :                               _nvmf_tgt_add_transport_done);
     970           0 : }
     971             : 
     972             : struct nvmf_tgt_pause_ctx {
     973             :         struct spdk_nvmf_tgt *tgt;
     974             :         spdk_nvmf_tgt_pause_polling_cb_fn cb_fn;
     975             :         void *cb_arg;
     976             : };
     977             : 
     978             : static void
     979           0 : _nvmf_tgt_pause_polling_done(struct spdk_io_channel_iter *i, int status)
     980             : {
     981           0 :         struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     982             : 
     983           0 :         ctx->tgt->state = NVMF_TGT_PAUSED;
     984             : 
     985           0 :         ctx->cb_fn(ctx->cb_arg, status);
     986           0 :         free(ctx);
     987           0 : }
     988             : 
     989             : static void
     990           0 : _nvmf_tgt_pause_polling(struct spdk_io_channel_iter *i)
     991             : {
     992           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     993           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     994             :         struct spdk_nvmf_transport_poll_group *tgroup;
     995             : 
     996           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
     997           0 :                 nvmf_transport_poll_group_pause(tgroup);
     998           0 :         }
     999             : 
    1000           0 :         spdk_for_each_channel_continue(i, 0);
    1001           0 : }
    1002             : 
    1003             : int
    1004           0 : spdk_nvmf_tgt_pause_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_pause_polling_cb_fn cb_fn,
    1005             :                             void *cb_arg)
    1006             : {
    1007             :         struct nvmf_tgt_pause_ctx *ctx;
    1008             : 
    1009             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_pause_polling, tgt, tgt->name);
    1010             : 
    1011           0 :         switch (tgt->state) {
    1012             :         case NVMF_TGT_PAUSING:
    1013             :         case NVMF_TGT_RESUMING:
    1014           0 :                 return -EBUSY;
    1015             :         case NVMF_TGT_RUNNING:
    1016           0 :                 break;
    1017             :         default:
    1018           0 :                 return -EINVAL;
    1019             :         }
    1020             : 
    1021           0 :         ctx = calloc(1, sizeof(*ctx));
    1022           0 :         if (!ctx) {
    1023           0 :                 return -ENOMEM;
    1024             :         }
    1025             : 
    1026             : 
    1027           0 :         tgt->state = NVMF_TGT_PAUSING;
    1028             : 
    1029           0 :         ctx->tgt = tgt;
    1030           0 :         ctx->cb_fn = cb_fn;
    1031           0 :         ctx->cb_arg = cb_arg;
    1032             : 
    1033           0 :         spdk_for_each_channel(tgt,
    1034             :                               _nvmf_tgt_pause_polling,
    1035           0 :                               ctx,
    1036             :                               _nvmf_tgt_pause_polling_done);
    1037           0 :         return 0;
    1038           0 : }
    1039             : 
    1040             : static void
    1041           0 : _nvmf_tgt_resume_polling_done(struct spdk_io_channel_iter *i, int status)
    1042             : {
    1043           0 :         struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    1044             : 
    1045           0 :         ctx->tgt->state = NVMF_TGT_RUNNING;
    1046             : 
    1047           0 :         ctx->cb_fn(ctx->cb_arg, status);
    1048           0 :         free(ctx);
    1049           0 : }
    1050             : 
    1051             : static void
    1052           0 : _nvmf_tgt_resume_polling(struct spdk_io_channel_iter *i)
    1053             : {
    1054           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
    1055           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
    1056             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1057             : 
    1058           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
    1059           0 :                 nvmf_transport_poll_group_resume(tgroup);
    1060           0 :         }
    1061             : 
    1062           0 :         spdk_for_each_channel_continue(i, 0);
    1063           0 : }
    1064             : 
    1065             : int
    1066           0 : spdk_nvmf_tgt_resume_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_resume_polling_cb_fn cb_fn,
    1067             :                              void *cb_arg)
    1068             : {
    1069             :         struct nvmf_tgt_pause_ctx *ctx;
    1070             : 
    1071             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_resume_polling, tgt, tgt->name);
    1072             : 
    1073           0 :         switch (tgt->state) {
    1074             :         case NVMF_TGT_PAUSING:
    1075             :         case NVMF_TGT_RESUMING:
    1076           0 :                 return -EBUSY;
    1077             :         case NVMF_TGT_PAUSED:
    1078           0 :                 break;
    1079             :         default:
    1080           0 :                 return -EINVAL;
    1081             :         }
    1082             : 
    1083           0 :         ctx = calloc(1, sizeof(*ctx));
    1084           0 :         if (!ctx) {
    1085           0 :                 return -ENOMEM;
    1086             :         }
    1087             : 
    1088           0 :         tgt->state = NVMF_TGT_RESUMING;
    1089             : 
    1090           0 :         ctx->tgt = tgt;
    1091           0 :         ctx->cb_fn = cb_fn;
    1092           0 :         ctx->cb_arg = cb_arg;
    1093             : 
    1094           0 :         spdk_for_each_channel(tgt,
    1095             :                               _nvmf_tgt_resume_polling,
    1096           0 :                               ctx,
    1097             :                               _nvmf_tgt_resume_polling_done);
    1098           0 :         return 0;
    1099           0 : }
    1100             : 
    1101             : struct spdk_nvmf_subsystem *
    1102           0 : spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn)
    1103             : {
    1104             :         struct spdk_nvmf_subsystem subsystem;
    1105             : 
    1106           0 :         if (!subnqn) {
    1107           0 :                 return NULL;
    1108             :         }
    1109             : 
    1110             :         /* Ensure that subnqn is null terminated */
    1111           0 :         if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) {
    1112           0 :                 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n");
    1113           0 :                 return NULL;
    1114             :         }
    1115             : 
    1116           0 :         snprintf(subsystem.subnqn, sizeof(subsystem.subnqn), "%s", subnqn);
    1117           0 :         return RB_FIND(subsystem_tree, &tgt->subsystems, &subsystem);
    1118           0 : }
    1119             : 
    1120             : struct spdk_nvmf_referral *
    1121           0 : spdk_nvmf_tgt_find_referral(struct spdk_nvmf_tgt *tgt, const char *subnqn)
    1122             : {
    1123             :         struct spdk_nvmf_referral *referral;
    1124             : 
    1125           0 :         TAILQ_FOREACH(referral, &tgt->referrals, link) {
    1126           0 :                 if (!strncmp(referral->trid.subnqn, subnqn, SPDK_NVMF_NQN_MAX_LEN)) {
    1127           0 :                         return referral;
    1128             :                 }
    1129           0 :         }
    1130             : 
    1131           0 :         return NULL;
    1132           0 : }
    1133             : 
    1134             : struct spdk_nvmf_transport *
    1135           0 : spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name)
    1136             : {
    1137             :         struct spdk_nvmf_transport *transport;
    1138             : 
    1139           0 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
    1140           0 :                 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) {
    1141           0 :                         return transport;
    1142             :                 }
    1143           0 :         }
    1144           0 :         return NULL;
    1145           0 : }
    1146             : 
    1147             : struct nvmf_new_qpair_ctx {
    1148             :         struct spdk_nvmf_qpair *qpair;
    1149             :         struct spdk_nvmf_poll_group *group;
    1150             : };
    1151             : 
    1152             : static void
    1153           0 : _nvmf_poll_group_add(void *_ctx)
    1154             : {
    1155           0 :         struct nvmf_new_qpair_ctx *ctx = _ctx;
    1156           0 :         struct spdk_nvmf_qpair *qpair = ctx->qpair;
    1157           0 :         struct spdk_nvmf_poll_group *group = ctx->group;
    1158             : 
    1159           0 :         free(_ctx);
    1160             : 
    1161           0 :         if (spdk_nvmf_poll_group_add(group, qpair) != 0) {
    1162           0 :                 SPDK_ERRLOG("Unable to add the qpair to a poll group.\n");
    1163             : 
    1164           0 :                 assert(qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED);
    1165           0 :                 pthread_mutex_lock(&group->mutex);
    1166           0 :                 assert(group->current_unassociated_qpairs > 0);
    1167           0 :                 group->current_unassociated_qpairs--;
    1168           0 :                 pthread_mutex_unlock(&group->mutex);
    1169             : 
    1170           0 :                 spdk_nvmf_qpair_disconnect(qpair);
    1171           0 :         }
    1172           0 : }
    1173             : 
    1174             : void
    1175           0 : spdk_nvmf_tgt_new_qpair(struct spdk_nvmf_tgt *tgt, struct spdk_nvmf_qpair *qpair)
    1176             : {
    1177             :         struct spdk_nvmf_poll_group *group;
    1178             :         struct nvmf_new_qpair_ctx *ctx;
    1179             : 
    1180           0 :         group = spdk_nvmf_get_optimal_poll_group(qpair);
    1181           0 :         if (group == NULL) {
    1182           0 :                 if (tgt->next_poll_group == NULL) {
    1183           0 :                         tgt->next_poll_group = TAILQ_FIRST(&tgt->poll_groups);
    1184           0 :                         if (tgt->next_poll_group == NULL) {
    1185           0 :                                 SPDK_ERRLOG("No poll groups exist.\n");
    1186           0 :                                 spdk_nvmf_qpair_disconnect(qpair);
    1187           0 :                                 return;
    1188             :                         }
    1189           0 :                 }
    1190           0 :                 group = tgt->next_poll_group;
    1191           0 :                 tgt->next_poll_group = TAILQ_NEXT(group, link);
    1192           0 :         }
    1193             : 
    1194           0 :         ctx = calloc(1, sizeof(*ctx));
    1195           0 :         if (!ctx) {
    1196           0 :                 SPDK_ERRLOG("Unable to send message to poll group.\n");
    1197           0 :                 spdk_nvmf_qpair_disconnect(qpair);
    1198           0 :                 return;
    1199             :         }
    1200             : 
    1201           0 :         ctx->qpair = qpair;
    1202           0 :         ctx->group = group;
    1203             : 
    1204           0 :         pthread_mutex_lock(&group->mutex);
    1205           0 :         group->current_unassociated_qpairs++;
    1206           0 :         pthread_mutex_unlock(&group->mutex);
    1207             : 
    1208           0 :         spdk_thread_send_msg(group->thread, _nvmf_poll_group_add, ctx);
    1209           0 : }
    1210             : 
    1211             : struct spdk_nvmf_poll_group *
    1212           0 : spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt)
    1213             : {
    1214             :         struct spdk_io_channel *ch;
    1215             : 
    1216           0 :         ch = spdk_get_io_channel(tgt);
    1217           0 :         if (!ch) {
    1218           0 :                 SPDK_ERRLOG("Unable to get I/O channel for target\n");
    1219           0 :                 return NULL;
    1220             :         }
    1221             : 
    1222           0 :         return spdk_io_channel_get_ctx(ch);
    1223           0 : }
    1224             : 
    1225             : void
    1226           0 : spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group,
    1227             :                              spdk_nvmf_poll_group_destroy_done_fn cb_fn,
    1228             :                              void *cb_arg)
    1229             : {
    1230           0 :         assert(group->destroy_cb_fn == NULL);
    1231           0 :         group->destroy_cb_fn = cb_fn;
    1232           0 :         group->destroy_cb_arg = cb_arg;
    1233             : 
    1234             :         /* This function will put the io_channel associated with this poll group */
    1235           0 :         nvmf_tgt_destroy_poll_group_qpairs(group);
    1236           0 : }
    1237             : 
    1238             : int
    1239           0 : spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group,
    1240             :                          struct spdk_nvmf_qpair *qpair)
    1241             : {
    1242             :         int rc;
    1243             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1244             : 
    1245           0 :         TAILQ_INIT(&qpair->outstanding);
    1246           0 :         qpair->group = group;
    1247           0 :         qpair->ctrlr = NULL;
    1248           0 :         qpair->disconnect_started = false;
    1249             : 
    1250           0 :         tgroup = nvmf_get_transport_poll_group(group, qpair->transport);
    1251           0 :         if (tgroup == NULL) {
    1252           0 :                 return -1;
    1253             :         }
    1254             : 
    1255           0 :         rc = nvmf_transport_poll_group_add(tgroup, qpair);
    1256             : 
    1257             :         /* We add the qpair to the group only it is successfully added into the tgroup */
    1258           0 :         if (rc == 0) {
    1259             :                 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_qpair, qpair, spdk_thread_get_id(group->thread));
    1260           0 :                 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link);
    1261           0 :                 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_CONNECTING);
    1262           0 :         }
    1263             : 
    1264           0 :         return rc;
    1265           0 : }
    1266             : 
    1267             : static void
    1268           0 : _nvmf_ctrlr_destruct(void *ctx)
    1269             : {
    1270           0 :         struct spdk_nvmf_ctrlr *ctrlr = ctx;
    1271             : 
    1272           0 :         nvmf_ctrlr_destruct(ctrlr);
    1273           0 : }
    1274             : 
    1275             : static void
    1276           0 : _nvmf_ctrlr_free_from_qpair(void *ctx)
    1277             : {
    1278           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1279           0 :         struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr;
    1280             :         uint32_t count;
    1281             : 
    1282           0 :         spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid);
    1283           0 :         SPDK_DEBUGLOG(nvmf, "qpair_mask cleared, qid %u\n", qpair_ctx->qid);
    1284           0 :         count = spdk_bit_array_count_set(ctrlr->qpair_mask);
    1285           0 :         if (count == 0) {
    1286           0 :                 assert(!ctrlr->in_destruct);
    1287           0 :                 SPDK_DEBUGLOG(nvmf, "Last qpair %u, destroy ctrlr 0x%hx\n", qpair_ctx->qid, ctrlr->cntlid);
    1288           0 :                 ctrlr->in_destruct = true;
    1289           0 :                 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr);
    1290           0 :         }
    1291           0 :         free(qpair_ctx);
    1292           0 : }
    1293             : 
    1294             : static void
    1295           0 : _nvmf_transport_qpair_fini_complete(void *cb_ctx)
    1296             : {
    1297           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = cb_ctx;
    1298             :         struct spdk_nvmf_ctrlr *ctrlr;
    1299             : 
    1300           0 :         ctrlr = qpair_ctx->ctrlr;
    1301           0 :         SPDK_DEBUGLOG(nvmf, "Finish destroying qid %u\n", qpair_ctx->qid);
    1302             : 
    1303           0 :         if (ctrlr) {
    1304           0 :                 if (qpair_ctx->qid == 0) {
    1305             :                         /* Admin qpair is removed, so set the pointer to NULL.
    1306             :                          * This operation is safe since we are on ctrlr thread now, admin qpair's thread is the same
    1307             :                          * as controller's thread */
    1308           0 :                         assert(ctrlr->thread == spdk_get_thread());
    1309           0 :                         ctrlr->admin_qpair = NULL;
    1310           0 :                 }
    1311             :                 /* Free qpair id from controller's bit mask and destroy the controller if it is the last qpair */
    1312           0 :                 if (ctrlr->thread) {
    1313           0 :                         spdk_thread_send_msg(ctrlr->thread, _nvmf_ctrlr_free_from_qpair, qpair_ctx);
    1314           0 :                 } else {
    1315           0 :                         _nvmf_ctrlr_free_from_qpair(qpair_ctx);
    1316             :                 }
    1317           0 :         } else {
    1318           0 :                 free(qpair_ctx);
    1319             :         }
    1320           0 : }
    1321             : 
    1322             : void
    1323           0 : spdk_nvmf_poll_group_remove(struct spdk_nvmf_qpair *qpair)
    1324             : {
    1325             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1326             :         int rc;
    1327             : 
    1328             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_remove_qpair, qpair,
    1329             :                                  spdk_thread_get_id(qpair->group->thread));
    1330           0 :         nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR);
    1331             : 
    1332             :         /* Find the tgroup and remove the qpair from the tgroup */
    1333           0 :         tgroup = nvmf_get_transport_poll_group(qpair->group, qpair->transport);
    1334           0 :         if (tgroup != NULL) {
    1335           0 :                 rc = nvmf_transport_poll_group_remove(tgroup, qpair);
    1336           0 :                 if (rc && (rc != ENOTSUP)) {
    1337           0 :                         SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n",
    1338             :                                     qpair, tgroup);
    1339           0 :                 }
    1340           0 :         }
    1341             : 
    1342           0 :         TAILQ_REMOVE(&qpair->group->qpairs, qpair, link);
    1343           0 :         qpair->group = NULL;
    1344           0 : }
    1345             : 
    1346             : static void
    1347           0 : _nvmf_qpair_sgroup_req_clean(struct spdk_nvmf_subsystem_poll_group *sgroup,
    1348             :                              const struct spdk_nvmf_qpair *qpair)
    1349             : {
    1350             :         struct spdk_nvmf_request *req, *tmp;
    1351           0 :         TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1352           0 :                 if (req->qpair == qpair) {
    1353           0 :                         TAILQ_REMOVE(&sgroup->queued, req, link);
    1354           0 :                         if (nvmf_transport_req_free(req)) {
    1355           0 :                                 SPDK_ERRLOG("Transport request free error!\n");
    1356           0 :                         }
    1357           0 :                 }
    1358           0 :         }
    1359           0 : }
    1360             : 
    1361             : static void
    1362           0 : _nvmf_qpair_destroy(void *ctx, int status)
    1363             : {
    1364           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1365           0 :         struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair;
    1366           0 :         struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr;
    1367             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1368             :         uint32_t sid;
    1369             : 
    1370           0 :         assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING);
    1371           0 :         qpair_ctx->qid = qpair->qid;
    1372             : 
    1373           0 :         if (qpair->connect_received) {
    1374           0 :                 if (0 == qpair->qid) {
    1375           0 :                         assert(qpair->group->stat.current_admin_qpairs > 0);
    1376           0 :                         qpair->group->stat.current_admin_qpairs--;
    1377           0 :                 } else {
    1378           0 :                         assert(qpair->group->stat.current_io_qpairs > 0);
    1379           0 :                         qpair->group->stat.current_io_qpairs--;
    1380             :                 }
    1381           0 :         } else {
    1382           0 :                 pthread_mutex_lock(&qpair->group->mutex);
    1383           0 :                 assert(qpair->group->current_unassociated_qpairs > 0);
    1384           0 :                 qpair->group->current_unassociated_qpairs--;
    1385           0 :                 pthread_mutex_unlock(&qpair->group->mutex);
    1386             :         }
    1387             : 
    1388           0 :         if (ctrlr) {
    1389           0 :                 sgroup = &qpair->group->sgroups[ctrlr->subsys->id];
    1390           0 :                 _nvmf_qpair_sgroup_req_clean(sgroup, qpair);
    1391           0 :         } else {
    1392           0 :                 for (sid = 0; sid < qpair->group->num_sgroups; sid++) {
    1393           0 :                         sgroup = &qpair->group->sgroups[sid];
    1394           0 :                         assert(sgroup != NULL);
    1395           0 :                         _nvmf_qpair_sgroup_req_clean(sgroup, qpair);
    1396           0 :                 }
    1397             :         }
    1398             : 
    1399           0 :         nvmf_qpair_auth_destroy(qpair);
    1400           0 :         qpair_ctx->ctrlr = ctrlr;
    1401           0 :         spdk_nvmf_poll_group_remove(qpair);
    1402           0 :         nvmf_transport_qpair_fini(qpair, _nvmf_transport_qpair_fini_complete, qpair_ctx);
    1403           0 : }
    1404             : 
    1405             : static void
    1406           0 : _nvmf_qpair_disconnect_msg(void *ctx)
    1407             : {
    1408           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1409             : 
    1410           0 :         spdk_nvmf_qpair_disconnect(qpair_ctx->qpair);
    1411           0 :         free(ctx);
    1412           0 : }
    1413             : 
    1414             : int
    1415           0 : spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair)
    1416             : {
    1417           0 :         struct spdk_nvmf_poll_group *group = qpair->group;
    1418             :         struct nvmf_qpair_disconnect_ctx *qpair_ctx;
    1419             : 
    1420           0 :         if (__atomic_test_and_set(&qpair->disconnect_started, __ATOMIC_RELAXED)) {
    1421           0 :                 return -EINPROGRESS;
    1422             :         }
    1423             : 
    1424             :         /* If we get a qpair in the uninitialized state, we can just destroy it immediately */
    1425           0 :         if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) {
    1426           0 :                 nvmf_transport_qpair_fini(qpair, NULL, NULL);
    1427           0 :                 return 0;
    1428             :         }
    1429             : 
    1430           0 :         assert(group != NULL);
    1431           0 :         if (spdk_get_thread() != group->thread) {
    1432             :                 /* clear the atomic so we can set it on the next call on the proper thread. */
    1433           0 :                 __atomic_clear(&qpair->disconnect_started, __ATOMIC_RELAXED);
    1434           0 :                 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx));
    1435           0 :                 if (!qpair_ctx) {
    1436           0 :                         SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n");
    1437           0 :                         return -ENOMEM;
    1438             :                 }
    1439           0 :                 qpair_ctx->qpair = qpair;
    1440           0 :                 spdk_thread_send_msg(group->thread, _nvmf_qpair_disconnect_msg, qpair_ctx);
    1441           0 :                 return 0;
    1442             :         }
    1443             : 
    1444             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_qpair_disconnect, qpair, spdk_thread_get_id(group->thread));
    1445           0 :         assert(spdk_nvmf_qpair_is_active(qpair));
    1446           0 :         nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING);
    1447             : 
    1448           0 :         qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx));
    1449           0 :         if (!qpair_ctx) {
    1450           0 :                 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n");
    1451           0 :                 return -ENOMEM;
    1452             :         }
    1453             : 
    1454           0 :         qpair_ctx->qpair = qpair;
    1455             : 
    1456             :         /* Check for outstanding I/O */
    1457           0 :         if (!TAILQ_EMPTY(&qpair->outstanding)) {
    1458             :                 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_drain_qpair, qpair, spdk_thread_get_id(group->thread));
    1459           0 :                 qpair->state_cb = _nvmf_qpair_destroy;
    1460           0 :                 qpair->state_cb_arg = qpair_ctx;
    1461           0 :                 nvmf_qpair_abort_pending_zcopy_reqs(qpair);
    1462           0 :                 nvmf_qpair_free_aer(qpair);
    1463           0 :                 return 0;
    1464             :         }
    1465             : 
    1466           0 :         _nvmf_qpair_destroy(qpair_ctx, 0);
    1467             : 
    1468           0 :         return 0;
    1469           0 : }
    1470             : 
    1471             : int
    1472           0 : spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
    1473             :                               struct spdk_nvme_transport_id *trid)
    1474             : {
    1475           0 :         memset(trid, 0, sizeof(*trid));
    1476           0 :         return nvmf_transport_qpair_get_peer_trid(qpair, trid);
    1477             : }
    1478             : 
    1479             : int
    1480           0 : spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
    1481             :                                struct spdk_nvme_transport_id *trid)
    1482             : {
    1483           0 :         memset(trid, 0, sizeof(*trid));
    1484           0 :         return nvmf_transport_qpair_get_local_trid(qpair, trid);
    1485             : }
    1486             : 
    1487             : int
    1488           0 : spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
    1489             :                                 struct spdk_nvme_transport_id *trid)
    1490             : {
    1491           0 :         memset(trid, 0, sizeof(*trid));
    1492           0 :         return nvmf_transport_qpair_get_listen_trid(qpair, trid);
    1493             : }
    1494             : 
    1495             : static int
    1496           1 : poll_group_update_subsystem(struct spdk_nvmf_poll_group *group,
    1497             :                             struct spdk_nvmf_subsystem *subsystem)
    1498             : {
    1499             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1500             :         uint32_t i, j;
    1501             :         struct spdk_nvmf_ns *ns;
    1502             :         struct spdk_nvmf_registrant *reg, *tmp;
    1503             :         struct spdk_io_channel *ch;
    1504             :         struct spdk_nvmf_subsystem_pg_ns_info *ns_info;
    1505             :         struct spdk_nvmf_ctrlr *ctrlr;
    1506             :         bool ns_changed;
    1507             : 
    1508             :         /* Make sure our poll group has memory for this subsystem allocated */
    1509           1 :         if (subsystem->id >= group->num_sgroups) {
    1510           0 :                 return -ENOMEM;
    1511             :         }
    1512             : 
    1513           1 :         sgroup = &group->sgroups[subsystem->id];
    1514             : 
    1515             :         /* Make sure the array of namespace information is the correct size */
    1516           1 :         if (sgroup->num_ns == 0 && subsystem->max_nsid > 0) {
    1517             :                 /* First allocation */
    1518           1 :                 sgroup->ns_info = calloc(subsystem->max_nsid, sizeof(struct spdk_nvmf_subsystem_pg_ns_info));
    1519           1 :                 if (!sgroup->ns_info) {
    1520           0 :                         return -ENOMEM;
    1521             :                 }
    1522           1 :                 sgroup->num_ns = subsystem->max_nsid;
    1523           1 :         }
    1524             : 
    1525           1 :         ns_changed = false;
    1526             : 
    1527             :         /* Detect bdevs that were added or removed */
    1528           2 :         for (i = 0; i < sgroup->num_ns; i++) {
    1529           1 :                 ns = subsystem->ns[i];
    1530           1 :                 ns_info = &sgroup->ns_info[i];
    1531           1 :                 ch = ns_info->channel;
    1532             : 
    1533           1 :                 if (ns == NULL && ch == NULL) {
    1534             :                         /* Both NULL. Leave empty */
    1535           1 :                 } else if (ns == NULL && ch != NULL) {
    1536             :                         /* There was a channel here, but the namespace is gone. */
    1537           0 :                         ns_changed = true;
    1538           0 :                         spdk_put_io_channel(ch);
    1539           0 :                         ns_info->channel = NULL;
    1540           1 :                 } else if (ns != NULL && ch == NULL) {
    1541             :                         /* A namespace appeared but there is no channel yet */
    1542           1 :                         ns_changed = true;
    1543           1 :                         ch = spdk_bdev_get_io_channel(ns->desc);
    1544           1 :                         if (ch == NULL) {
    1545           0 :                                 SPDK_ERRLOG("Could not allocate I/O channel.\n");
    1546           0 :                                 return -ENOMEM;
    1547             :                         }
    1548           1 :                         ns_info->channel = ch;
    1549           1 :                 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) {
    1550             :                         /* A namespace was here before, but was replaced by a new one. */
    1551           0 :                         ns_changed = true;
    1552           0 :                         spdk_put_io_channel(ns_info->channel);
    1553           0 :                         memset(ns_info, 0, sizeof(*ns_info));
    1554             : 
    1555           0 :                         ch = spdk_bdev_get_io_channel(ns->desc);
    1556           0 :                         if (ch == NULL) {
    1557           0 :                                 SPDK_ERRLOG("Could not allocate I/O channel.\n");
    1558           0 :                                 return -ENOMEM;
    1559             :                         }
    1560           0 :                         ns_info->channel = ch;
    1561           0 :                 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) {
    1562             :                         /* Namespace is still there but size has changed */
    1563           0 :                         SPDK_DEBUGLOG(nvmf, "Namespace resized: subsystem_id %u,"
    1564             :                                       " nsid %u, pg %p, old %" PRIu64 ", new %" PRIu64 "\n",
    1565             :                                       subsystem->id,
    1566             :                                       ns->nsid,
    1567             :                                       group,
    1568             :                                       ns_info->num_blocks,
    1569             :                                       spdk_bdev_get_num_blocks(ns->bdev));
    1570           0 :                         ns_changed = true;
    1571           0 :                 } else if (ns_info->anagrpid != ns->anagrpid) {
    1572             :                         /* Namespace is still there but ANA group ID has changed */
    1573           0 :                         SPDK_DEBUGLOG(nvmf, "ANA group ID changed: subsystem_id %u,"
    1574             :                                       "nsid %u, pg %p, old %u, new %u\n",
    1575             :                                       subsystem->id,
    1576             :                                       ns->nsid,
    1577             :                                       group,
    1578             :                                       ns_info->anagrpid,
    1579             :                                       ns->anagrpid);
    1580           0 :                         ns_changed = true;
    1581           0 :                 }
    1582             : 
    1583           1 :                 if (ns == NULL) {
    1584           0 :                         memset(ns_info, 0, sizeof(*ns_info));
    1585           0 :                 } else {
    1586           1 :                         ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev);
    1587           1 :                         ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev);
    1588           1 :                         ns_info->anagrpid = ns->anagrpid;
    1589           1 :                         ns_info->crkey = ns->crkey;
    1590           1 :                         ns_info->rtype = ns->rtype;
    1591           1 :                         if (ns->holder) {
    1592           0 :                                 ns_info->holder_id = ns->holder->hostid;
    1593           0 :                         }
    1594             : 
    1595           1 :                         memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid));
    1596           1 :                         j = 0;
    1597           1 :                         TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) {
    1598           0 :                                 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) {
    1599           0 :                                         SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS);
    1600           0 :                                         return -EINVAL;
    1601             :                                 }
    1602           0 :                                 ns_info->reg_hostid[j++] = reg->hostid;
    1603           0 :                         }
    1604             :                 }
    1605           1 :         }
    1606             : 
    1607           1 :         if (ns_changed) {
    1608           1 :                 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) {
    1609           0 :                         if (ctrlr->thread != spdk_get_thread()) {
    1610           0 :                                 continue;
    1611             :                         }
    1612             :                         /* It is possible that a ctrlr was added but the admin_qpair hasn't been
    1613             :                          * assigned yet.
    1614             :                          */
    1615           0 :                         if (!ctrlr->admin_qpair) {
    1616           0 :                                 continue;
    1617             :                         }
    1618           0 :                         if (ctrlr->admin_qpair->group == group) {
    1619           0 :                                 nvmf_ctrlr_async_event_ns_notice(ctrlr);
    1620           0 :                                 nvmf_ctrlr_async_event_ana_change_notice(ctrlr);
    1621           0 :                         }
    1622           0 :                 }
    1623           1 :         }
    1624             : 
    1625           1 :         return 0;
    1626           1 : }
    1627             : 
    1628             : int
    1629           0 : nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group,
    1630             :                                  struct spdk_nvmf_subsystem *subsystem)
    1631             : {
    1632           0 :         return poll_group_update_subsystem(group, subsystem);
    1633             : }
    1634             : 
    1635             : int
    1636           1 : nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group,
    1637             :                               struct spdk_nvmf_subsystem *subsystem,
    1638             :                               spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1639             : {
    1640           1 :         int rc = 0;
    1641           1 :         struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id];
    1642             :         struct spdk_nvmf_request *req, *tmp;
    1643             :         uint32_t i;
    1644             : 
    1645           1 :         if (!TAILQ_EMPTY(&sgroup->queued)) {
    1646           0 :                 SPDK_ERRLOG("sgroup->queued not empty when adding subsystem\n");
    1647           0 :                 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1648           0 :                         TAILQ_REMOVE(&sgroup->queued, req, link);
    1649           0 :                         if (nvmf_transport_req_free(req)) {
    1650           0 :                                 SPDK_ERRLOG("Transport request free error!\n");
    1651           0 :                         }
    1652           0 :                 }
    1653           0 :         }
    1654             : 
    1655           1 :         rc = poll_group_update_subsystem(group, subsystem);
    1656           1 :         if (rc) {
    1657           0 :                 nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL);
    1658           0 :                 goto fini;
    1659             :         }
    1660             : 
    1661           1 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1662             : 
    1663           2 :         for (i = 0; i < sgroup->num_ns; i++) {
    1664           1 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1665           2 :         }
    1666             : 
    1667             : fini:
    1668           1 :         if (cb_fn) {
    1669           0 :                 cb_fn(cb_arg, rc);
    1670           0 :         }
    1671             : 
    1672             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_subsystem, spdk_thread_get_id(group->thread),
    1673             :                                  subsystem->subnqn);
    1674             : 
    1675           1 :         return rc;
    1676             : }
    1677             : 
    1678             : static void
    1679           0 : _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status)
    1680             : {
    1681           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
    1682             :         struct spdk_nvmf_subsystem *subsystem;
    1683             :         struct spdk_nvmf_poll_group *group;
    1684             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1685           0 :         spdk_nvmf_poll_group_mod_done cpl_fn = NULL;
    1686           0 :         void *cpl_ctx = NULL;
    1687             :         uint32_t nsid;
    1688             : 
    1689           0 :         group = qpair_ctx->group;
    1690           0 :         subsystem = qpair_ctx->subsystem;
    1691           0 :         cpl_fn = qpair_ctx->cpl_fn;
    1692           0 :         cpl_ctx = qpair_ctx->cpl_ctx;
    1693           0 :         sgroup = &group->sgroups[subsystem->id];
    1694             : 
    1695           0 :         if (status) {
    1696           0 :                 goto fini;
    1697             :         }
    1698             : 
    1699           0 :         for (nsid = 0; nsid < sgroup->num_ns; nsid++) {
    1700           0 :                 if (sgroup->ns_info[nsid].channel) {
    1701           0 :                         spdk_put_io_channel(sgroup->ns_info[nsid].channel);
    1702           0 :                         sgroup->ns_info[nsid].channel = NULL;
    1703           0 :                 }
    1704           0 :         }
    1705             : 
    1706           0 :         sgroup->num_ns = 0;
    1707           0 :         free(sgroup->ns_info);
    1708           0 :         sgroup->ns_info = NULL;
    1709             : fini:
    1710           0 :         free(qpair_ctx);
    1711           0 :         if (cpl_fn) {
    1712           0 :                 cpl_fn(cpl_ctx, status);
    1713           0 :         }
    1714           0 : }
    1715             : 
    1716             : static void nvmf_poll_group_remove_subsystem_msg(void *ctx);
    1717             : 
    1718             : static void
    1719           0 : nvmf_poll_group_remove_subsystem_msg(void *ctx)
    1720             : {
    1721             :         struct spdk_nvmf_qpair *qpair, *qpair_tmp;
    1722             :         struct spdk_nvmf_subsystem *subsystem;
    1723             :         struct spdk_nvmf_poll_group *group;
    1724           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
    1725           0 :         bool qpairs_found = false;
    1726           0 :         int rc = 0;
    1727             : 
    1728           0 :         group = qpair_ctx->group;
    1729           0 :         subsystem = qpair_ctx->subsystem;
    1730             : 
    1731           0 :         TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) {
    1732           0 :                 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) {
    1733           0 :                         qpairs_found = true;
    1734           0 :                         rc = spdk_nvmf_qpair_disconnect(qpair);
    1735           0 :                         if (rc && rc != -EINPROGRESS) {
    1736           0 :                                 break;
    1737             :                         }
    1738           0 :                 }
    1739           0 :         }
    1740             : 
    1741           0 :         if (!qpairs_found) {
    1742           0 :                 _nvmf_poll_group_remove_subsystem_cb(ctx, 0);
    1743           0 :                 return;
    1744             :         }
    1745             : 
    1746             :         /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */
    1747           0 :         spdk_thread_send_msg(spdk_get_thread(), nvmf_poll_group_remove_subsystem_msg, ctx);
    1748           0 : }
    1749             : 
    1750             : void
    1751           0 : nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group,
    1752             :                                  struct spdk_nvmf_subsystem *subsystem,
    1753             :                                  spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1754             : {
    1755             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1756             :         struct nvmf_qpair_disconnect_many_ctx *ctx;
    1757             :         uint32_t i;
    1758             : 
    1759             :         SPDK_DTRACE_PROBE3_TICKS(nvmf_poll_group_remove_subsystem, group, spdk_thread_get_id(group->thread),
    1760             :                                  subsystem->subnqn);
    1761             : 
    1762           0 :         ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx));
    1763           0 :         if (!ctx) {
    1764           0 :                 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n");
    1765           0 :                 if (cb_fn) {
    1766           0 :                         cb_fn(cb_arg, -1);
    1767           0 :                 }
    1768           0 :                 return;
    1769             :         }
    1770             : 
    1771           0 :         ctx->group = group;
    1772           0 :         ctx->subsystem = subsystem;
    1773           0 :         ctx->cpl_fn = cb_fn;
    1774           0 :         ctx->cpl_ctx = cb_arg;
    1775             : 
    1776           0 :         sgroup = &group->sgroups[subsystem->id];
    1777           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE;
    1778             : 
    1779           0 :         for (i = 0; i < sgroup->num_ns; i++) {
    1780           0 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_INACTIVE;
    1781           0 :         }
    1782             : 
    1783           0 :         nvmf_poll_group_remove_subsystem_msg(ctx);
    1784           0 : }
    1785             : 
    1786             : void
    1787           0 : nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group,
    1788             :                                 struct spdk_nvmf_subsystem *subsystem,
    1789             :                                 uint32_t nsid,
    1790             :                                 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1791             : {
    1792             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1793           0 :         struct spdk_nvmf_subsystem_pg_ns_info *ns_info = NULL;
    1794           0 :         int rc = 0;
    1795             :         uint32_t i;
    1796             : 
    1797           0 :         if (subsystem->id >= group->num_sgroups) {
    1798           0 :                 rc = -1;
    1799           0 :                 goto fini;
    1800             :         }
    1801             : 
    1802           0 :         sgroup = &group->sgroups[subsystem->id];
    1803           0 :         if (sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED) {
    1804           0 :                 goto fini;
    1805             :         }
    1806           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1807             : 
    1808           0 :         if (nsid == SPDK_NVME_GLOBAL_NS_TAG) {
    1809           0 :                 for (i = 0; i < sgroup->num_ns; i++) {
    1810           0 :                         ns_info = &sgroup->ns_info[i];
    1811           0 :                         ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1812           0 :                 }
    1813           0 :         } else {
    1814             :                 /* NOTE: This implicitly also checks for 0, since 0 - 1 wraps around to UINT32_MAX. */
    1815           0 :                 if (nsid - 1 < sgroup->num_ns) {
    1816           0 :                         ns_info  = &sgroup->ns_info[nsid - 1];
    1817           0 :                         ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1818           0 :                 }
    1819             :         }
    1820             : 
    1821           0 :         if (sgroup->mgmt_io_outstanding > 0) {
    1822           0 :                 assert(sgroup->cb_fn == NULL);
    1823           0 :                 sgroup->cb_fn = cb_fn;
    1824           0 :                 assert(sgroup->cb_arg == NULL);
    1825           0 :                 sgroup->cb_arg = cb_arg;
    1826           0 :                 return;
    1827             :         }
    1828             : 
    1829           0 :         if (nsid == SPDK_NVME_GLOBAL_NS_TAG) {
    1830           0 :                 for (i = 0; i < sgroup->num_ns; i++) {
    1831           0 :                         ns_info = &sgroup->ns_info[i];
    1832             : 
    1833           0 :                         if (ns_info->io_outstanding > 0) {
    1834           0 :                                 assert(sgroup->cb_fn == NULL);
    1835           0 :                                 sgroup->cb_fn = cb_fn;
    1836           0 :                                 assert(sgroup->cb_arg == NULL);
    1837           0 :                                 sgroup->cb_arg = cb_arg;
    1838           0 :                                 return;
    1839             :                         }
    1840           0 :                 }
    1841           0 :         } else {
    1842           0 :                 if (ns_info != NULL && ns_info->io_outstanding > 0) {
    1843           0 :                         assert(sgroup->cb_fn == NULL);
    1844           0 :                         sgroup->cb_fn = cb_fn;
    1845           0 :                         assert(sgroup->cb_arg == NULL);
    1846           0 :                         sgroup->cb_arg = cb_arg;
    1847           0 :                         return;
    1848             :                 }
    1849             :         }
    1850             : 
    1851           0 :         assert(sgroup->mgmt_io_outstanding == 0);
    1852           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED;
    1853             : fini:
    1854           0 :         if (cb_fn) {
    1855           0 :                 cb_fn(cb_arg, rc);
    1856           0 :         }
    1857           0 : }
    1858             : 
    1859             : void
    1860           0 : nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group,
    1861             :                                  struct spdk_nvmf_subsystem *subsystem,
    1862             :                                  spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1863             : {
    1864             :         struct spdk_nvmf_request *req, *tmp;
    1865             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1866           0 :         int rc = 0;
    1867             :         uint32_t i;
    1868             : 
    1869           0 :         if (subsystem->id >= group->num_sgroups) {
    1870           0 :                 rc = -1;
    1871           0 :                 goto fini;
    1872             :         }
    1873             : 
    1874           0 :         sgroup = &group->sgroups[subsystem->id];
    1875             : 
    1876           0 :         if (sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE) {
    1877           0 :                 goto fini;
    1878             :         }
    1879             : 
    1880           0 :         rc = poll_group_update_subsystem(group, subsystem);
    1881           0 :         if (rc) {
    1882           0 :                 goto fini;
    1883             :         }
    1884             : 
    1885           0 :         for (i = 0; i < sgroup->num_ns; i++) {
    1886           0 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1887           0 :         }
    1888             : 
    1889           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1890             : 
    1891             :         /* Release all queued requests */
    1892           0 :         TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1893           0 :                 TAILQ_REMOVE(&sgroup->queued, req, link);
    1894           0 :                 if (spdk_nvmf_request_using_zcopy(req)) {
    1895           0 :                         spdk_nvmf_request_zcopy_start(req);
    1896           0 :                 } else {
    1897           0 :                         spdk_nvmf_request_exec(req);
    1898             :                 }
    1899             : 
    1900           0 :         }
    1901             : fini:
    1902           0 :         if (cb_fn) {
    1903           0 :                 cb_fn(cb_arg, rc);
    1904           0 :         }
    1905           0 : }
    1906             : 
    1907             : 
    1908             : struct spdk_nvmf_poll_group *
    1909           0 : spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair)
    1910             : {
    1911             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1912             : 
    1913           0 :         tgroup = nvmf_transport_get_optimal_poll_group(qpair->transport, qpair);
    1914             : 
    1915           0 :         if (tgroup == NULL) {
    1916           0 :                 return NULL;
    1917             :         }
    1918             : 
    1919           0 :         return tgroup->group;
    1920           0 : }
    1921             : 
    1922             : void
    1923           0 : spdk_nvmf_poll_group_dump_stat(struct spdk_nvmf_poll_group *group, struct spdk_json_write_ctx *w)
    1924             : {
    1925             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1926             : 
    1927           0 :         spdk_json_write_object_begin(w);
    1928             : 
    1929           0 :         spdk_json_write_named_string(w, "name", spdk_thread_get_name(spdk_get_thread()));
    1930           0 :         spdk_json_write_named_uint32(w, "admin_qpairs", group->stat.admin_qpairs);
    1931           0 :         spdk_json_write_named_uint32(w, "io_qpairs", group->stat.io_qpairs);
    1932           0 :         spdk_json_write_named_uint32(w, "current_admin_qpairs", group->stat.current_admin_qpairs);
    1933           0 :         spdk_json_write_named_uint32(w, "current_io_qpairs", group->stat.current_io_qpairs);
    1934           0 :         spdk_json_write_named_uint64(w, "pending_bdev_io", group->stat.pending_bdev_io);
    1935           0 :         spdk_json_write_named_uint64(w, "completed_nvme_io", group->stat.completed_nvme_io);
    1936             : 
    1937           0 :         spdk_json_write_named_array_begin(w, "transports");
    1938             : 
    1939           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
    1940           0 :                 spdk_json_write_object_begin(w);
    1941             :                 /*
    1942             :                  * The trtype field intentionally contains a transport name as this is more informative.
    1943             :                  * The field has not been renamed for backward compatibility.
    1944             :                  */
    1945           0 :                 spdk_json_write_named_string(w, "trtype", spdk_nvmf_get_transport_name(tgroup->transport));
    1946             : 
    1947           0 :                 if (tgroup->transport->ops->poll_group_dump_stat) {
    1948           0 :                         tgroup->transport->ops->poll_group_dump_stat(tgroup, w);
    1949           0 :                 }
    1950             : 
    1951           0 :                 spdk_json_write_object_end(w);
    1952           0 :         }
    1953             : 
    1954           0 :         spdk_json_write_array_end(w);
    1955           0 :         spdk_json_write_object_end(w);
    1956           0 : }

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