LCOV - code coverage report
Current view: top level - lib/nvmf - nvmf.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 105 954 11.0 %
Date: 2024-07-13 12:24:37 Functions: 8 67 11.9 %

          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             :         nvmf_qpair_disconnect_cb cb_fn;
      34             :         struct spdk_thread *thread;
      35             :         void *ctx;
      36             :         uint16_t qid;
      37             : };
      38             : 
      39             : /*
      40             :  * There are several times when we need to iterate through the list of all qpairs and selectively delete them.
      41             :  * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from
      42             :  * to enable calling nvmf_qpair_disconnect on the next desired qpair.
      43             :  */
      44             : struct nvmf_qpair_disconnect_many_ctx {
      45             :         struct spdk_nvmf_subsystem *subsystem;
      46             :         struct spdk_nvmf_poll_group *group;
      47             :         spdk_nvmf_poll_group_mod_done cpl_fn;
      48             :         void *cpl_ctx;
      49             : };
      50             : 
      51             : static struct spdk_nvmf_referral *
      52           0 : nvmf_tgt_find_referral(struct spdk_nvmf_tgt *tgt,
      53             :                        const struct spdk_nvme_transport_id *trid)
      54             : {
      55             :         struct spdk_nvmf_referral *referral;
      56             : 
      57           0 :         TAILQ_FOREACH(referral, &tgt->referrals, link) {
      58           0 :                 if (spdk_nvme_transport_id_compare(&referral->trid, trid) == 0) {
      59           0 :                         return referral;
      60             :                 }
      61             :         }
      62             : 
      63           0 :         return NULL;
      64             : }
      65             : 
      66             : int
      67           0 : spdk_nvmf_tgt_add_referral(struct spdk_nvmf_tgt *tgt,
      68             :                            const struct spdk_nvmf_referral_opts *uopts)
      69             : {
      70             :         struct spdk_nvmf_referral *referral;
      71           0 :         struct spdk_nvmf_referral_opts opts = {};
      72           0 :         struct spdk_nvme_transport_id *trid = &opts.trid;
      73             : 
      74           0 :         memcpy(&opts, uopts, spdk_min(uopts->size, sizeof(opts)));
      75           0 :         if (trid->subnqn[0] == '\0') {
      76           0 :                 snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
      77             :         }
      78             : 
      79           0 :         if (!nvmf_nqn_is_valid(trid->subnqn)) {
      80           0 :                 SPDK_ERRLOG("Invalid subsystem NQN\n");
      81           0 :                 return -EINVAL;
      82             :         }
      83             : 
      84             :         /* If the entry already exists, just ignore it. */
      85           0 :         if (nvmf_tgt_find_referral(tgt, trid)) {
      86           0 :                 return 0;
      87             :         }
      88             : 
      89           0 :         referral = calloc(1, sizeof(*referral));
      90           0 :         if (!referral) {
      91           0 :                 SPDK_ERRLOG("Failed to allocate memory for a referral\n");
      92           0 :                 return -ENOMEM;
      93             :         }
      94             : 
      95           0 :         referral->entry.subtype = nvmf_nqn_is_discovery(trid->subnqn) ?
      96             :                                   SPDK_NVMF_SUBTYPE_DISCOVERY :
      97             :                                   SPDK_NVMF_SUBTYPE_NVME;
      98           0 :         referral->entry.treq.secure_channel = opts.secure_channel ?
      99           0 :                                               SPDK_NVMF_TREQ_SECURE_CHANNEL_REQUIRED :
     100             :                                               SPDK_NVMF_TREQ_SECURE_CHANNEL_NOT_REQUIRED;
     101           0 :         referral->entry.cntlid = 0xffff;
     102           0 :         referral->entry.trtype = trid->trtype;
     103           0 :         referral->entry.adrfam = trid->adrfam;
     104           0 :         memcpy(&referral->trid, trid, sizeof(struct spdk_nvme_transport_id));
     105           0 :         spdk_strcpy_pad(referral->entry.subnqn, trid->subnqn, sizeof(trid->subnqn), '\0');
     106           0 :         spdk_strcpy_pad(referral->entry.trsvcid, trid->trsvcid, sizeof(referral->entry.trsvcid), ' ');
     107           0 :         spdk_strcpy_pad(referral->entry.traddr, trid->traddr, sizeof(referral->entry.traddr), ' ');
     108             : 
     109           0 :         TAILQ_INSERT_HEAD(&tgt->referrals, referral, link);
     110           0 :         nvmf_update_discovery_log(tgt, NULL);
     111             : 
     112           0 :         return 0;
     113             : }
     114             : 
     115             : int
     116           0 : spdk_nvmf_tgt_remove_referral(struct spdk_nvmf_tgt *tgt,
     117             :                               const struct spdk_nvmf_referral_opts *uopts)
     118             : {
     119             :         struct spdk_nvmf_referral *referral;
     120           0 :         struct spdk_nvmf_referral_opts opts = {};
     121           0 :         struct spdk_nvme_transport_id *trid = &opts.trid;
     122             : 
     123           0 :         memcpy(&opts, uopts, spdk_min(uopts->size, sizeof(opts)));
     124           0 :         if (trid->subnqn[0] == '\0') {
     125           0 :                 snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
     126             :         }
     127             : 
     128           0 :         referral = nvmf_tgt_find_referral(tgt, &opts.trid);
     129           0 :         if (referral == NULL) {
     130           0 :                 return -ENOENT;
     131             :         }
     132             : 
     133           0 :         TAILQ_REMOVE(&tgt->referrals, referral, link);
     134           0 :         nvmf_update_discovery_log(tgt, NULL);
     135             : 
     136           0 :         free(referral);
     137             : 
     138           0 :         return 0;
     139             : }
     140             : 
     141             : static void
     142           0 : nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair,
     143             :                      enum spdk_nvmf_qpair_state state)
     144             : {
     145           0 :         assert(qpair != NULL);
     146           0 :         assert(qpair->group->thread == spdk_get_thread());
     147             : 
     148           0 :         qpair->state = state;
     149           0 : }
     150             : 
     151             : static int
     152           0 : nvmf_poll_group_poll(void *ctx)
     153             : {
     154           0 :         struct spdk_nvmf_poll_group *group = ctx;
     155             :         int rc;
     156           0 :         int count = 0;
     157             :         struct spdk_nvmf_transport_poll_group *tgroup;
     158             : 
     159           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
     160           0 :                 rc = nvmf_transport_poll_group_poll(tgroup);
     161           0 :                 if (rc < 0) {
     162           0 :                         return SPDK_POLLER_BUSY;
     163             :                 }
     164           0 :                 count += rc;
     165             :         }
     166             : 
     167           0 :         return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
     168             : }
     169             : 
     170             : /*
     171             :  * Reset and clean up the poll group (I/O channel code will actually free the
     172             :  * group).
     173             :  */
     174             : static void
     175           1 : nvmf_tgt_cleanup_poll_group(struct spdk_nvmf_poll_group *group)
     176             : {
     177             :         struct spdk_nvmf_transport_poll_group *tgroup, *tmp;
     178             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
     179             :         uint32_t sid, nsid;
     180             : 
     181           2 :         TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) {
     182           1 :                 TAILQ_REMOVE(&group->tgroups, tgroup, link);
     183           1 :                 nvmf_transport_poll_group_destroy(tgroup);
     184             :         }
     185             : 
     186           2 :         for (sid = 0; sid < group->num_sgroups; sid++) {
     187           1 :                 sgroup = &group->sgroups[sid];
     188             : 
     189           1 :                 assert(sgroup != NULL);
     190             : 
     191           2 :                 for (nsid = 0; nsid < sgroup->num_ns; nsid++) {
     192           1 :                         if (sgroup->ns_info[nsid].channel) {
     193           1 :                                 spdk_put_io_channel(sgroup->ns_info[nsid].channel);
     194           1 :                                 sgroup->ns_info[nsid].channel = NULL;
     195             :                         }
     196             :                 }
     197             : 
     198           1 :                 free(sgroup->ns_info);
     199             :         }
     200             : 
     201           1 :         free(group->sgroups);
     202             : 
     203           1 :         spdk_poller_unregister(&group->poller);
     204             : 
     205           1 :         if (group->destroy_cb_fn) {
     206           0 :                 group->destroy_cb_fn(group->destroy_cb_arg, 0);
     207             :         }
     208           1 : }
     209             : 
     210             : /*
     211             :  * Callback to unregister a poll group from the target, and clean up its state.
     212             :  */
     213             : static void
     214           1 : nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf)
     215             : {
     216           1 :         struct spdk_nvmf_tgt *tgt = io_device;
     217           1 :         struct spdk_nvmf_poll_group *group = ctx_buf;
     218             : 
     219             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group, spdk_thread_get_id(group->thread));
     220             : 
     221           1 :         pthread_mutex_lock(&tgt->mutex);
     222           1 :         TAILQ_REMOVE(&tgt->poll_groups, group, link);
     223           1 :         tgt->num_poll_groups--;
     224           1 :         pthread_mutex_unlock(&tgt->mutex);
     225             : 
     226           1 :         assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING));
     227           1 :         nvmf_tgt_cleanup_poll_group(group);
     228           1 : }
     229             : 
     230             : static int
     231           1 : nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group,
     232             :                               struct spdk_nvmf_transport *transport)
     233             : {
     234             :         struct spdk_nvmf_transport_poll_group *tgroup;
     235             : 
     236           1 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
     237           0 :                 if (tgroup->transport == transport) {
     238             :                         /* Transport already in the poll group */
     239           0 :                         return 0;
     240             :                 }
     241             :         }
     242             : 
     243           1 :         tgroup = nvmf_transport_poll_group_create(transport, group);
     244           1 :         if (!tgroup) {
     245           0 :                 SPDK_ERRLOG("Unable to create poll group for transport\n");
     246           0 :                 return -1;
     247             :         }
     248             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_transport_poll_group_create, transport,
     249             :                                  spdk_thread_get_id(group->thread));
     250             : 
     251           1 :         tgroup->group = group;
     252           1 :         TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link);
     253             : 
     254           1 :         return 0;
     255             : }
     256             : 
     257             : static int
     258           1 : nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf)
     259             : {
     260           1 :         struct spdk_nvmf_tgt *tgt = io_device;
     261           1 :         struct spdk_nvmf_poll_group *group = ctx_buf;
     262             :         struct spdk_nvmf_transport *transport;
     263             :         struct spdk_nvmf_subsystem *subsystem;
     264           1 :         struct spdk_thread *thread = spdk_get_thread();
     265             :         int rc;
     266             : 
     267           1 :         group->tgt = tgt;
     268           1 :         TAILQ_INIT(&group->tgroups);
     269           1 :         TAILQ_INIT(&group->qpairs);
     270           1 :         group->thread = thread;
     271           1 :         pthread_mutex_init(&group->mutex, NULL);
     272             : 
     273           1 :         group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0);
     274             : 
     275             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_create_poll_group, spdk_thread_get_id(thread));
     276             : 
     277           2 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
     278           1 :                 rc = nvmf_poll_group_add_transport(group, transport);
     279           1 :                 if (rc != 0) {
     280           0 :                         nvmf_tgt_cleanup_poll_group(group);
     281           0 :                         return rc;
     282             :                 }
     283             :         }
     284             : 
     285           1 :         group->num_sgroups = tgt->max_subsystems;
     286           1 :         group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group));
     287           1 :         if (!group->sgroups) {
     288           0 :                 nvmf_tgt_cleanup_poll_group(group);
     289           0 :                 return -ENOMEM;
     290             :         }
     291             : 
     292           2 :         for (subsystem = spdk_nvmf_subsystem_get_first(tgt);
     293             :              subsystem != NULL;
     294           1 :              subsystem = spdk_nvmf_subsystem_get_next(subsystem)) {
     295           1 :                 if (nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) {
     296           0 :                         nvmf_tgt_cleanup_poll_group(group);
     297           0 :                         return -1;
     298             :                 }
     299             :         }
     300             : 
     301           1 :         pthread_mutex_lock(&tgt->mutex);
     302           1 :         tgt->num_poll_groups++;
     303           1 :         TAILQ_INSERT_TAIL(&tgt->poll_groups, group, link);
     304           1 :         pthread_mutex_unlock(&tgt->mutex);
     305             : 
     306           1 :         return 0;
     307             : }
     308             : 
     309             : static void
     310           0 : _nvmf_tgt_disconnect_qpairs(void *ctx)
     311             : {
     312             :         struct spdk_nvmf_qpair *qpair, *qpair_tmp;
     313           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
     314           0 :         struct spdk_nvmf_poll_group *group = qpair_ctx->group;
     315             :         struct spdk_io_channel *ch;
     316             :         int rc;
     317             : 
     318           0 :         TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) {
     319           0 :                 rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL);
     320           0 :                 if (rc && rc != -EINPROGRESS) {
     321           0 :                         break;
     322             :                 }
     323             :         }
     324             : 
     325           0 :         if (TAILQ_EMPTY(&group->qpairs)) {
     326             :                 /* When the refcount from the channels reaches 0, nvmf_tgt_destroy_poll_group will be called. */
     327           0 :                 ch = spdk_io_channel_from_ctx(group);
     328           0 :                 spdk_put_io_channel(ch);
     329           0 :                 free(qpair_ctx);
     330           0 :                 return;
     331             :         }
     332             : 
     333             :         /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */
     334           0 :         spdk_thread_send_msg(spdk_get_thread(), _nvmf_tgt_disconnect_qpairs, ctx);
     335             : }
     336             : 
     337             : static void
     338           0 : nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group)
     339             : {
     340             :         struct nvmf_qpair_disconnect_many_ctx *ctx;
     341             : 
     342             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group_qpairs, spdk_thread_get_id(group->thread));
     343             : 
     344           0 :         ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx));
     345           0 :         if (!ctx) {
     346           0 :                 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n");
     347           0 :                 return;
     348             :         }
     349             : 
     350           0 :         ctx->group = group;
     351           0 :         _nvmf_tgt_disconnect_qpairs(ctx);
     352             : }
     353             : 
     354             : struct spdk_nvmf_tgt *
     355           0 : spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *opts)
     356             : {
     357             :         struct spdk_nvmf_tgt *tgt, *tmp_tgt;
     358             : 
     359           0 :         if (strnlen(opts->name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) {
     360           0 :                 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH);
     361           0 :                 return NULL;
     362             :         }
     363             : 
     364           0 :         TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) {
     365           0 :                 if (!strncmp(opts->name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) {
     366           0 :                         SPDK_ERRLOG("Provided target name must be unique.\n");
     367           0 :                         return NULL;
     368             :                 }
     369             :         }
     370             : 
     371           0 :         tgt = calloc(1, sizeof(*tgt));
     372           0 :         if (!tgt) {
     373           0 :                 return NULL;
     374             :         }
     375             : 
     376           0 :         snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts->name);
     377             : 
     378           0 :         if (!opts || !opts->max_subsystems) {
     379           0 :                 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS;
     380             :         } else {
     381           0 :                 tgt->max_subsystems = opts->max_subsystems;
     382             :         }
     383             : 
     384           0 :         if (!opts) {
     385           0 :                 tgt->crdt[0] = 0;
     386           0 :                 tgt->crdt[1] = 0;
     387           0 :                 tgt->crdt[2] = 0;
     388             :         } else {
     389           0 :                 tgt->crdt[0] = opts->crdt[0];
     390           0 :                 tgt->crdt[1] = opts->crdt[1];
     391           0 :                 tgt->crdt[2] = opts->crdt[2];
     392             :         }
     393             : 
     394           0 :         if (!opts) {
     395           0 :                 tgt->discovery_filter = SPDK_NVMF_TGT_DISCOVERY_MATCH_ANY;
     396             :         } else {
     397           0 :                 tgt->discovery_filter = opts->discovery_filter;
     398             :         }
     399             : 
     400           0 :         tgt->discovery_genctr = 0;
     401           0 :         TAILQ_INIT(&tgt->transports);
     402           0 :         TAILQ_INIT(&tgt->poll_groups);
     403           0 :         TAILQ_INIT(&tgt->referrals);
     404           0 :         tgt->num_poll_groups = 0;
     405             : 
     406           0 :         tgt->subsystem_ids = spdk_bit_array_create(tgt->max_subsystems);
     407           0 :         if (tgt->subsystem_ids == NULL) {
     408           0 :                 free(tgt);
     409           0 :                 return NULL;
     410             :         }
     411             : 
     412           0 :         RB_INIT(&tgt->subsystems);
     413             : 
     414           0 :         pthread_mutex_init(&tgt->mutex, NULL);
     415             : 
     416           0 :         spdk_io_device_register(tgt,
     417             :                                 nvmf_tgt_create_poll_group,
     418             :                                 nvmf_tgt_destroy_poll_group,
     419             :                                 sizeof(struct spdk_nvmf_poll_group),
     420           0 :                                 tgt->name);
     421             : 
     422           0 :         tgt->state = NVMF_TGT_RUNNING;
     423             : 
     424           0 :         TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link);
     425             : 
     426           0 :         return tgt;
     427             : }
     428             : 
     429             : static void
     430           0 : _nvmf_tgt_destroy_next_transport(void *ctx)
     431             : {
     432           0 :         struct spdk_nvmf_tgt *tgt = ctx;
     433             :         struct spdk_nvmf_transport *transport;
     434             : 
     435           0 :         if (!TAILQ_EMPTY(&tgt->transports)) {
     436           0 :                 transport = TAILQ_FIRST(&tgt->transports);
     437           0 :                 TAILQ_REMOVE(&tgt->transports, transport, link);
     438           0 :                 spdk_nvmf_transport_destroy(transport, _nvmf_tgt_destroy_next_transport, tgt);
     439             :         } else {
     440           0 :                 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn = tgt->destroy_cb_fn;
     441           0 :                 void *destroy_cb_arg = tgt->destroy_cb_arg;
     442             : 
     443           0 :                 pthread_mutex_destroy(&tgt->mutex);
     444           0 :                 free(tgt);
     445             : 
     446           0 :                 if (destroy_cb_fn) {
     447           0 :                         destroy_cb_fn(destroy_cb_arg, 0);
     448             :                 }
     449             :         }
     450           0 : }
     451             : 
     452             : static void
     453           0 : nvmf_tgt_destroy_cb(void *io_device)
     454             : {
     455           0 :         struct spdk_nvmf_tgt *tgt = io_device;
     456             :         struct spdk_nvmf_subsystem *subsystem, *subsystem_next;
     457             :         int rc;
     458             :         struct spdk_nvmf_referral *referral;
     459             : 
     460           0 :         while ((referral = TAILQ_FIRST(&tgt->referrals))) {
     461           0 :                 TAILQ_REMOVE(&tgt->referrals, referral, link);
     462           0 :                 free(referral);
     463             :         }
     464             : 
     465             :         /* We will be freeing subsystems in this loop, so we always need to get the next one
     466             :          * ahead of time, since we can't call get_next() on a subsystem that's been freed.
     467             :          */
     468           0 :         for (subsystem = spdk_nvmf_subsystem_get_first(tgt),
     469           0 :              subsystem_next = spdk_nvmf_subsystem_get_next(subsystem);
     470             :              subsystem != NULL;
     471           0 :              subsystem = subsystem_next,
     472           0 :              subsystem_next = spdk_nvmf_subsystem_get_next(subsystem_next)) {
     473           0 :                 nvmf_subsystem_remove_all_listeners(subsystem, true);
     474             : 
     475           0 :                 rc = spdk_nvmf_subsystem_destroy(subsystem, nvmf_tgt_destroy_cb, tgt);
     476           0 :                 if (rc) {
     477           0 :                         if (rc == -EINPROGRESS) {
     478             :                                 /* If rc is -EINPROGRESS, nvmf_tgt_destroy_cb will be called again when subsystem #i
     479             :                                  * is destroyed, nvmf_tgt_destroy_cb will continue to destroy other subsystems if any */
     480           0 :                                 return;
     481             :                         } else {
     482           0 :                                 SPDK_ERRLOG("Failed to destroy subsystem %s, rc %d\n", subsystem->subnqn, rc);
     483             :                         }
     484             :                 }
     485             :         }
     486           0 :         spdk_bit_array_free(&tgt->subsystem_ids);
     487           0 :         _nvmf_tgt_destroy_next_transport(tgt);
     488             : }
     489             : 
     490             : void
     491           0 : spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt,
     492             :                       spdk_nvmf_tgt_destroy_done_fn cb_fn,
     493             :                       void *cb_arg)
     494             : {
     495           0 :         assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING));
     496             : 
     497           0 :         tgt->destroy_cb_fn = cb_fn;
     498           0 :         tgt->destroy_cb_arg = cb_arg;
     499             : 
     500           0 :         TAILQ_REMOVE(&g_nvmf_tgts, tgt, link);
     501             : 
     502           0 :         spdk_io_device_unregister(tgt, nvmf_tgt_destroy_cb);
     503           0 : }
     504             : 
     505             : const char *
     506           0 : spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt)
     507             : {
     508           0 :         return tgt->name;
     509             : }
     510             : 
     511             : struct spdk_nvmf_tgt *
     512           0 : spdk_nvmf_get_tgt(const char *name)
     513             : {
     514             :         struct spdk_nvmf_tgt *tgt;
     515           0 :         uint32_t num_targets = 0;
     516             : 
     517           0 :         TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) {
     518           0 :                 if (name) {
     519           0 :                         if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) {
     520           0 :                                 return tgt;
     521             :                         }
     522             :                 }
     523           0 :                 num_targets++;
     524             :         }
     525             : 
     526             :         /*
     527             :          * special case. If there is only one target and
     528             :          * no name was specified, return the only available
     529             :          * target. If there is more than one target, name must
     530             :          * be specified.
     531             :          */
     532           0 :         if (!name && num_targets == 1) {
     533           0 :                 return TAILQ_FIRST(&g_nvmf_tgts);
     534             :         }
     535             : 
     536           0 :         return NULL;
     537             : }
     538             : 
     539             : struct spdk_nvmf_tgt *
     540           0 : spdk_nvmf_get_first_tgt(void)
     541             : {
     542           0 :         return TAILQ_FIRST(&g_nvmf_tgts);
     543             : }
     544             : 
     545             : struct spdk_nvmf_tgt *
     546           0 : spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev)
     547             : {
     548           0 :         return TAILQ_NEXT(prev, link);
     549             : }
     550             : 
     551             : static void
     552           0 : nvmf_write_nvme_subsystem_config(struct spdk_json_write_ctx *w,
     553             :                                  struct spdk_nvmf_subsystem *subsystem)
     554             : {
     555             :         struct spdk_nvmf_host *host;
     556             :         struct spdk_nvmf_ns *ns;
     557           0 :         struct spdk_nvmf_ns_opts ns_opts;
     558             :         uint32_t max_namespaces;
     559             :         struct spdk_nvmf_transport *transport;
     560             : 
     561           0 :         assert(spdk_nvmf_subsystem_get_type(subsystem) == SPDK_NVMF_SUBTYPE_NVME);
     562             : 
     563             :         /* { */
     564           0 :         spdk_json_write_object_begin(w);
     565           0 :         spdk_json_write_named_string(w, "method", "nvmf_create_subsystem");
     566             : 
     567             :         /*     "params" : { */
     568           0 :         spdk_json_write_named_object_begin(w, "params");
     569           0 :         spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     570           0 :         spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem));
     571           0 :         spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem));
     572           0 :         spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem));
     573             : 
     574           0 :         max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem);
     575           0 :         if (max_namespaces != 0) {
     576           0 :                 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces);
     577             :         }
     578             : 
     579           0 :         spdk_json_write_named_uint32(w, "min_cntlid", spdk_nvmf_subsystem_get_min_cntlid(subsystem));
     580           0 :         spdk_json_write_named_uint32(w, "max_cntlid", spdk_nvmf_subsystem_get_max_cntlid(subsystem));
     581           0 :         spdk_json_write_named_bool(w, "ana_reporting", spdk_nvmf_subsystem_get_ana_reporting(subsystem));
     582             : 
     583             :         /*     } "params" */
     584           0 :         spdk_json_write_object_end(w);
     585             : 
     586             :         /* } */
     587           0 :         spdk_json_write_object_end(w);
     588             : 
     589           0 :         for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL;
     590           0 :              host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) {
     591             : 
     592           0 :                 spdk_json_write_object_begin(w);
     593           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host");
     594             : 
     595             :                 /*     "params" : { */
     596           0 :                 spdk_json_write_named_object_begin(w, "params");
     597             : 
     598           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     599           0 :                 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host));
     600             : 
     601           0 :                 TAILQ_FOREACH(transport, &subsystem->tgt->transports, link) {
     602           0 :                         if (transport->ops->subsystem_dump_host != NULL) {
     603           0 :                                 transport->ops->subsystem_dump_host(transport, subsystem, host->nqn, w);
     604             :                         }
     605             :                 }
     606             : 
     607             :                 /*     } "params" */
     608           0 :                 spdk_json_write_object_end(w);
     609             : 
     610             :                 /* } */
     611           0 :                 spdk_json_write_object_end(w);
     612             :         }
     613             : 
     614           0 :         for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL;
     615           0 :              ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) {
     616           0 :                 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts));
     617             : 
     618           0 :                 spdk_json_write_object_begin(w);
     619           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns");
     620             : 
     621             :                 /*     "params" : { */
     622           0 :                 spdk_json_write_named_object_begin(w, "params");
     623             : 
     624           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     625             : 
     626             :                 /*     "namespace" : { */
     627           0 :                 spdk_json_write_named_object_begin(w, "namespace");
     628             : 
     629           0 :                 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns));
     630           0 :                 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns)));
     631             : 
     632           0 :                 if (ns->ptpl_file != NULL) {
     633           0 :                         spdk_json_write_named_string(w, "ptpl_file", ns->ptpl_file);
     634             :                 }
     635             : 
     636           0 :                 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) {
     637             :                         SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch");
     638           0 :                         spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]),
     639             :                                                          from_be64(&ns_opts.nguid[8]));
     640             :                 }
     641             : 
     642           0 :                 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) {
     643             :                         SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch");
     644           0 :                         spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64));
     645             :                 }
     646             : 
     647           0 :                 if (!spdk_uuid_is_null(&ns_opts.uuid)) {
     648           0 :                         spdk_json_write_named_uuid(w, "uuid",  &ns_opts.uuid);
     649             :                 }
     650             : 
     651           0 :                 if (spdk_nvmf_subsystem_get_ana_reporting(subsystem)) {
     652           0 :                         spdk_json_write_named_uint32(w, "anagrpid", ns_opts.anagrpid);
     653             :                 }
     654             : 
     655             :                 /*     "namespace" */
     656           0 :                 spdk_json_write_object_end(w);
     657             : 
     658             :                 /*     } "params" */
     659           0 :                 spdk_json_write_object_end(w);
     660             : 
     661             :                 /* } */
     662           0 :                 spdk_json_write_object_end(w);
     663             :         }
     664           0 : }
     665             : 
     666             : static void
     667           0 : nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w,
     668             :                                  struct spdk_nvmf_subsystem *subsystem)
     669             : {
     670             :         struct spdk_nvmf_subsystem_listener *listener;
     671             :         struct spdk_nvmf_transport *transport;
     672             :         const struct spdk_nvme_transport_id *trid;
     673             : 
     674           0 :         if (spdk_nvmf_subsystem_get_type(subsystem) == SPDK_NVMF_SUBTYPE_NVME) {
     675           0 :                 nvmf_write_nvme_subsystem_config(w, subsystem);
     676             :         }
     677             : 
     678           0 :         for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL;
     679           0 :              listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) {
     680           0 :                 transport = listener->transport;
     681           0 :                 trid = spdk_nvmf_subsystem_listener_get_trid(listener);
     682             : 
     683           0 :                 spdk_json_write_object_begin(w);
     684           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener");
     685             : 
     686             :                 /*     "params" : { */
     687           0 :                 spdk_json_write_named_object_begin(w, "params");
     688             : 
     689           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     690             : 
     691           0 :                 spdk_json_write_named_object_begin(w, "listen_address");
     692           0 :                 nvmf_transport_listen_dump_trid(trid, w);
     693           0 :                 spdk_json_write_object_end(w);
     694           0 :                 if (transport->ops->listen_dump_opts) {
     695           0 :                         transport->ops->listen_dump_opts(transport, trid, w);
     696             :                 }
     697             : 
     698           0 :                 spdk_json_write_named_bool(w, "secure_channel", listener->opts.secure_channel);
     699             : 
     700             :                 /*     } "params" */
     701           0 :                 spdk_json_write_object_end(w);
     702             : 
     703             :                 /* } */
     704           0 :                 spdk_json_write_object_end(w);
     705             :         }
     706           0 : }
     707             : 
     708             : void
     709           0 : spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt)
     710             : {
     711             :         struct spdk_nvmf_subsystem *subsystem;
     712             :         struct spdk_nvmf_transport *transport;
     713             :         struct spdk_nvmf_referral *referral;
     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             :         }
     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_object_end(w);
     754             : 
     755           0 :                 spdk_json_write_object_end(w);
     756             :         }
     757             : 
     758           0 :         subsystem = spdk_nvmf_subsystem_get_first(tgt);
     759           0 :         while (subsystem) {
     760           0 :                 nvmf_write_subsystem_config_json(w, subsystem);
     761           0 :                 subsystem = spdk_nvmf_subsystem_get_next(subsystem);
     762             :         }
     763           0 : }
     764             : 
     765             : static void
     766           0 : nvmf_listen_opts_copy(struct spdk_nvmf_listen_opts *opts,
     767             :                       const struct spdk_nvmf_listen_opts *opts_src, size_t opts_size)
     768             : {
     769           0 :         assert(opts);
     770           0 :         assert(opts_src);
     771             : 
     772           0 :         opts->opts_size = opts_size;
     773             : 
     774             : #define SET_FIELD(field) \
     775             :     if (offsetof(struct spdk_nvmf_listen_opts, field) + sizeof(opts->field) <= opts_size) { \
     776             :                  opts->field = opts_src->field; \
     777             :     } \
     778             : 
     779           0 :         SET_FIELD(transport_specific);
     780           0 :         SET_FIELD(secure_channel);
     781           0 :         SET_FIELD(ana_state);
     782             : #undef SET_FIELD
     783             : 
     784             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
     785             :          * and do not forget to add the SET_FIELD statement for your added field. */
     786             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_nvmf_listen_opts) == 24, "Incorrect size");
     787           0 : }
     788             : 
     789             : void
     790           0 : spdk_nvmf_listen_opts_init(struct spdk_nvmf_listen_opts *opts, size_t opts_size)
     791             : {
     792           0 :         struct spdk_nvmf_listen_opts opts_local = {};
     793             : 
     794             :         /* local version of opts should have defaults set here */
     795           0 :         opts_local.ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
     796           0 :         nvmf_listen_opts_copy(opts, &opts_local, opts_size);
     797           0 : }
     798             : 
     799             : int
     800           0 : spdk_nvmf_tgt_listen_ext(struct spdk_nvmf_tgt *tgt, const struct spdk_nvme_transport_id *trid,
     801             :                          struct spdk_nvmf_listen_opts *opts)
     802             : {
     803             :         struct spdk_nvmf_transport *transport;
     804             :         int rc;
     805           0 :         struct spdk_nvmf_listen_opts opts_local = {};
     806             : 
     807           0 :         if (!opts) {
     808           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
     809           0 :                 return -EINVAL;
     810             :         }
     811             : 
     812           0 :         if (!opts->opts_size) {
     813           0 :                 SPDK_ERRLOG("The opts_size in opts structure should not be zero\n");
     814           0 :                 return -EINVAL;
     815             :         }
     816             : 
     817           0 :         transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring);
     818           0 :         if (!transport) {
     819           0 :                 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n",
     820             :                             trid->trstring);
     821           0 :                 return -EINVAL;
     822             :         }
     823             : 
     824           0 :         nvmf_listen_opts_copy(&opts_local, opts, opts->opts_size);
     825           0 :         rc = spdk_nvmf_transport_listen(transport, trid, &opts_local);
     826           0 :         if (rc < 0) {
     827           0 :                 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr);
     828             :         }
     829             : 
     830           0 :         return rc;
     831             : }
     832             : 
     833             : int
     834           0 : spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt,
     835             :                           struct spdk_nvme_transport_id *trid)
     836             : {
     837             :         struct spdk_nvmf_transport *transport;
     838             :         int rc;
     839             : 
     840           0 :         transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring);
     841           0 :         if (!transport) {
     842           0 :                 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n",
     843             :                             trid->trstring);
     844           0 :                 return -EINVAL;
     845             :         }
     846             : 
     847           0 :         rc = spdk_nvmf_transport_stop_listen(transport, trid);
     848           0 :         if (rc < 0) {
     849           0 :                 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr);
     850           0 :                 return rc;
     851             :         }
     852           0 :         return 0;
     853             : }
     854             : 
     855             : struct spdk_nvmf_tgt_add_transport_ctx {
     856             :         struct spdk_nvmf_tgt *tgt;
     857             :         struct spdk_nvmf_transport *transport;
     858             :         spdk_nvmf_tgt_add_transport_done_fn cb_fn;
     859             :         void *cb_arg;
     860             :         int status;
     861             : };
     862             : 
     863             : static void
     864           0 : _nvmf_tgt_remove_transport_done(struct spdk_io_channel_iter *i, int status)
     865             : {
     866           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     867             : 
     868           0 :         ctx->cb_fn(ctx->cb_arg, ctx->status);
     869           0 :         free(ctx);
     870           0 : }
     871             : 
     872             : static void
     873           0 : _nvmf_tgt_remove_transport(struct spdk_io_channel_iter *i)
     874             : {
     875           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     876           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     877           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     878             :         struct spdk_nvmf_transport_poll_group *tgroup, *tmp;
     879             : 
     880           0 :         TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) {
     881           0 :                 if (tgroup->transport == ctx->transport) {
     882           0 :                         TAILQ_REMOVE(&group->tgroups, tgroup, link);
     883           0 :                         nvmf_transport_poll_group_destroy(tgroup);
     884             :                 }
     885             :         }
     886             : 
     887           0 :         spdk_for_each_channel_continue(i, 0);
     888           0 : }
     889             : 
     890             : static void
     891           0 : _nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status)
     892             : {
     893           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     894             : 
     895           0 :         if (status) {
     896           0 :                 ctx->status = status;
     897           0 :                 spdk_for_each_channel(ctx->tgt,
     898             :                                       _nvmf_tgt_remove_transport,
     899             :                                       ctx,
     900             :                                       _nvmf_tgt_remove_transport_done);
     901           0 :                 return;
     902             :         }
     903             : 
     904           0 :         ctx->transport->tgt = ctx->tgt;
     905           0 :         TAILQ_INSERT_TAIL(&ctx->tgt->transports, ctx->transport, link);
     906           0 :         ctx->cb_fn(ctx->cb_arg, status);
     907           0 :         free(ctx);
     908             : }
     909             : 
     910             : static void
     911           0 : _nvmf_tgt_add_transport(struct spdk_io_channel_iter *i)
     912             : {
     913           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     914           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     915           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     916             :         int rc;
     917             : 
     918           0 :         rc = nvmf_poll_group_add_transport(group, ctx->transport);
     919           0 :         spdk_for_each_channel_continue(i, rc);
     920           0 : }
     921             : 
     922             : void
     923           0 : spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt,
     924             :                             struct spdk_nvmf_transport *transport,
     925             :                             spdk_nvmf_tgt_add_transport_done_fn cb_fn,
     926             :                             void *cb_arg)
     927             : {
     928             :         struct spdk_nvmf_tgt_add_transport_ctx *ctx;
     929             : 
     930             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_add_transport, transport, tgt->name);
     931             : 
     932           0 :         if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) {
     933           0 :                 cb_fn(cb_arg, -EEXIST);
     934           0 :                 return; /* transport already created */
     935             :         }
     936             : 
     937           0 :         ctx = calloc(1, sizeof(*ctx));
     938           0 :         if (!ctx) {
     939           0 :                 cb_fn(cb_arg, -ENOMEM);
     940           0 :                 return;
     941             :         }
     942             : 
     943           0 :         ctx->tgt = tgt;
     944           0 :         ctx->transport = transport;
     945           0 :         ctx->cb_fn = cb_fn;
     946           0 :         ctx->cb_arg = cb_arg;
     947             : 
     948           0 :         spdk_for_each_channel(tgt,
     949             :                               _nvmf_tgt_add_transport,
     950             :                               ctx,
     951             :                               _nvmf_tgt_add_transport_done);
     952             : }
     953             : 
     954             : struct nvmf_tgt_pause_ctx {
     955             :         struct spdk_nvmf_tgt *tgt;
     956             :         spdk_nvmf_tgt_pause_polling_cb_fn cb_fn;
     957             :         void *cb_arg;
     958             : };
     959             : 
     960             : static void
     961           0 : _nvmf_tgt_pause_polling_done(struct spdk_io_channel_iter *i, int status)
     962             : {
     963           0 :         struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     964             : 
     965           0 :         ctx->tgt->state = NVMF_TGT_PAUSED;
     966             : 
     967           0 :         ctx->cb_fn(ctx->cb_arg, status);
     968           0 :         free(ctx);
     969           0 : }
     970             : 
     971             : static void
     972           0 : _nvmf_tgt_pause_polling(struct spdk_io_channel_iter *i)
     973             : {
     974           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     975           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     976             : 
     977           0 :         spdk_poller_unregister(&group->poller);
     978             : 
     979           0 :         spdk_for_each_channel_continue(i, 0);
     980           0 : }
     981             : 
     982             : int
     983           0 : spdk_nvmf_tgt_pause_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_pause_polling_cb_fn cb_fn,
     984             :                             void *cb_arg)
     985             : {
     986             :         struct nvmf_tgt_pause_ctx *ctx;
     987             : 
     988             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_pause_polling, tgt, tgt->name);
     989             : 
     990           0 :         switch (tgt->state) {
     991           0 :         case NVMF_TGT_PAUSING:
     992             :         case NVMF_TGT_RESUMING:
     993           0 :                 return -EBUSY;
     994           0 :         case NVMF_TGT_RUNNING:
     995           0 :                 break;
     996           0 :         default:
     997           0 :                 return -EINVAL;
     998             :         }
     999             : 
    1000           0 :         ctx = calloc(1, sizeof(*ctx));
    1001           0 :         if (!ctx) {
    1002           0 :                 return -ENOMEM;
    1003             :         }
    1004             : 
    1005             : 
    1006           0 :         tgt->state = NVMF_TGT_PAUSING;
    1007             : 
    1008           0 :         ctx->tgt = tgt;
    1009           0 :         ctx->cb_fn = cb_fn;
    1010           0 :         ctx->cb_arg = cb_arg;
    1011             : 
    1012           0 :         spdk_for_each_channel(tgt,
    1013             :                               _nvmf_tgt_pause_polling,
    1014             :                               ctx,
    1015             :                               _nvmf_tgt_pause_polling_done);
    1016           0 :         return 0;
    1017             : }
    1018             : 
    1019             : static void
    1020           0 : _nvmf_tgt_resume_polling_done(struct spdk_io_channel_iter *i, int status)
    1021             : {
    1022           0 :         struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    1023             : 
    1024           0 :         ctx->tgt->state = NVMF_TGT_RUNNING;
    1025             : 
    1026           0 :         ctx->cb_fn(ctx->cb_arg, status);
    1027           0 :         free(ctx);
    1028           0 : }
    1029             : 
    1030             : static void
    1031           0 : _nvmf_tgt_resume_polling(struct spdk_io_channel_iter *i)
    1032             : {
    1033           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
    1034           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
    1035             : 
    1036           0 :         assert(group->poller == NULL);
    1037           0 :         group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0);
    1038             : 
    1039           0 :         spdk_for_each_channel_continue(i, 0);
    1040           0 : }
    1041             : 
    1042             : int
    1043           0 : spdk_nvmf_tgt_resume_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_resume_polling_cb_fn cb_fn,
    1044             :                              void *cb_arg)
    1045             : {
    1046             :         struct nvmf_tgt_pause_ctx *ctx;
    1047             : 
    1048             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_resume_polling, tgt, tgt->name);
    1049             : 
    1050           0 :         switch (tgt->state) {
    1051           0 :         case NVMF_TGT_PAUSING:
    1052             :         case NVMF_TGT_RESUMING:
    1053           0 :                 return -EBUSY;
    1054           0 :         case NVMF_TGT_PAUSED:
    1055           0 :                 break;
    1056           0 :         default:
    1057           0 :                 return -EINVAL;
    1058             :         }
    1059             : 
    1060           0 :         ctx = calloc(1, sizeof(*ctx));
    1061           0 :         if (!ctx) {
    1062           0 :                 return -ENOMEM;
    1063             :         }
    1064             : 
    1065           0 :         tgt->state = NVMF_TGT_RESUMING;
    1066             : 
    1067           0 :         ctx->tgt = tgt;
    1068           0 :         ctx->cb_fn = cb_fn;
    1069           0 :         ctx->cb_arg = cb_arg;
    1070             : 
    1071           0 :         spdk_for_each_channel(tgt,
    1072             :                               _nvmf_tgt_resume_polling,
    1073             :                               ctx,
    1074             :                               _nvmf_tgt_resume_polling_done);
    1075           0 :         return 0;
    1076             : }
    1077             : 
    1078             : struct spdk_nvmf_subsystem *
    1079           0 : spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn)
    1080             : {
    1081           0 :         struct spdk_nvmf_subsystem subsystem;
    1082             : 
    1083           0 :         if (!subnqn) {
    1084           0 :                 return NULL;
    1085             :         }
    1086             : 
    1087             :         /* Ensure that subnqn is null terminated */
    1088           0 :         if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) {
    1089           0 :                 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n");
    1090           0 :                 return NULL;
    1091             :         }
    1092             : 
    1093           0 :         snprintf(subsystem.subnqn, sizeof(subsystem.subnqn), "%s", subnqn);
    1094           0 :         return RB_FIND(subsystem_tree, &tgt->subsystems, &subsystem);
    1095             : }
    1096             : 
    1097             : struct spdk_nvmf_transport *
    1098           0 : spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name)
    1099             : {
    1100             :         struct spdk_nvmf_transport *transport;
    1101             : 
    1102           0 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
    1103           0 :                 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) {
    1104           0 :                         return transport;
    1105             :                 }
    1106             :         }
    1107           0 :         return NULL;
    1108             : }
    1109             : 
    1110             : struct nvmf_new_qpair_ctx {
    1111             :         struct spdk_nvmf_qpair *qpair;
    1112             :         struct spdk_nvmf_poll_group *group;
    1113             : };
    1114             : 
    1115             : static void
    1116           0 : _nvmf_poll_group_add(void *_ctx)
    1117             : {
    1118           0 :         struct nvmf_new_qpair_ctx *ctx = _ctx;
    1119           0 :         struct spdk_nvmf_qpair *qpair = ctx->qpair;
    1120           0 :         struct spdk_nvmf_poll_group *group = ctx->group;
    1121             : 
    1122           0 :         free(_ctx);
    1123             : 
    1124           0 :         if (spdk_nvmf_poll_group_add(group, qpair) != 0) {
    1125           0 :                 SPDK_ERRLOG("Unable to add the qpair to a poll group.\n");
    1126           0 :                 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL);
    1127             :         }
    1128           0 : }
    1129             : 
    1130             : void
    1131           0 : spdk_nvmf_tgt_new_qpair(struct spdk_nvmf_tgt *tgt, struct spdk_nvmf_qpair *qpair)
    1132             : {
    1133             :         struct spdk_nvmf_poll_group *group;
    1134             :         struct nvmf_new_qpair_ctx *ctx;
    1135             : 
    1136           0 :         group = spdk_nvmf_get_optimal_poll_group(qpair);
    1137           0 :         if (group == NULL) {
    1138           0 :                 if (tgt->next_poll_group == NULL) {
    1139           0 :                         tgt->next_poll_group = TAILQ_FIRST(&tgt->poll_groups);
    1140           0 :                         if (tgt->next_poll_group == NULL) {
    1141           0 :                                 SPDK_ERRLOG("No poll groups exist.\n");
    1142           0 :                                 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL);
    1143           0 :                                 return;
    1144             :                         }
    1145             :                 }
    1146           0 :                 group = tgt->next_poll_group;
    1147           0 :                 tgt->next_poll_group = TAILQ_NEXT(group, link);
    1148             :         }
    1149             : 
    1150           0 :         ctx = calloc(1, sizeof(*ctx));
    1151           0 :         if (!ctx) {
    1152           0 :                 SPDK_ERRLOG("Unable to send message to poll group.\n");
    1153           0 :                 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL);
    1154           0 :                 return;
    1155             :         }
    1156             : 
    1157           0 :         ctx->qpair = qpair;
    1158           0 :         ctx->group = group;
    1159             : 
    1160           0 :         pthread_mutex_lock(&group->mutex);
    1161           0 :         group->current_unassociated_qpairs++;
    1162           0 :         pthread_mutex_unlock(&group->mutex);
    1163             : 
    1164           0 :         spdk_thread_send_msg(group->thread, _nvmf_poll_group_add, ctx);
    1165             : }
    1166             : 
    1167             : struct spdk_nvmf_poll_group *
    1168           0 : spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt)
    1169             : {
    1170             :         struct spdk_io_channel *ch;
    1171             : 
    1172           0 :         ch = spdk_get_io_channel(tgt);
    1173           0 :         if (!ch) {
    1174           0 :                 SPDK_ERRLOG("Unable to get I/O channel for target\n");
    1175           0 :                 return NULL;
    1176             :         }
    1177             : 
    1178           0 :         return spdk_io_channel_get_ctx(ch);
    1179             : }
    1180             : 
    1181             : void
    1182           0 : spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group,
    1183             :                              spdk_nvmf_poll_group_destroy_done_fn cb_fn,
    1184             :                              void *cb_arg)
    1185             : {
    1186           0 :         assert(group->destroy_cb_fn == NULL);
    1187           0 :         group->destroy_cb_fn = cb_fn;
    1188           0 :         group->destroy_cb_arg = cb_arg;
    1189             : 
    1190             :         /* This function will put the io_channel associated with this poll group */
    1191           0 :         nvmf_tgt_destroy_poll_group_qpairs(group);
    1192           0 : }
    1193             : 
    1194             : int
    1195           0 : spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group,
    1196             :                          struct spdk_nvmf_qpair *qpair)
    1197             : {
    1198           0 :         int rc = -1;
    1199             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1200             : 
    1201           0 :         TAILQ_INIT(&qpair->outstanding);
    1202           0 :         qpair->group = group;
    1203           0 :         qpair->ctrlr = NULL;
    1204           0 :         qpair->disconnect_started = false;
    1205             : 
    1206           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
    1207           0 :                 if (tgroup->transport == qpair->transport) {
    1208           0 :                         rc = nvmf_transport_poll_group_add(tgroup, qpair);
    1209           0 :                         break;
    1210             :                 }
    1211             :         }
    1212             : 
    1213             :         /* We add the qpair to the group only it is successfully added into the tgroup */
    1214           0 :         if (rc == 0) {
    1215             :                 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_qpair, qpair, spdk_thread_get_id(group->thread));
    1216           0 :                 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link);
    1217           0 :                 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVE);
    1218             :         }
    1219             : 
    1220           0 :         return rc;
    1221             : }
    1222             : 
    1223             : static void
    1224           0 : _nvmf_ctrlr_destruct(void *ctx)
    1225             : {
    1226           0 :         struct spdk_nvmf_ctrlr *ctrlr = ctx;
    1227             : 
    1228           0 :         nvmf_ctrlr_destruct(ctrlr);
    1229           0 : }
    1230             : 
    1231             : static void
    1232           0 : _nvmf_ctrlr_free_from_qpair(void *ctx)
    1233             : {
    1234           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1235           0 :         struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr;
    1236             :         uint32_t count;
    1237             : 
    1238           0 :         spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid);
    1239           0 :         count = spdk_bit_array_count_set(ctrlr->qpair_mask);
    1240           0 :         if (count == 0) {
    1241           0 :                 assert(!ctrlr->in_destruct);
    1242           0 :                 SPDK_DEBUGLOG(nvmf, "Last qpair %u, destroy ctrlr 0x%hx\n", qpair_ctx->qid, ctrlr->cntlid);
    1243           0 :                 ctrlr->in_destruct = true;
    1244           0 :                 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr);
    1245             :         }
    1246           0 :         free(qpair_ctx);
    1247           0 : }
    1248             : 
    1249             : static void
    1250           0 : _nvmf_transport_qpair_fini_complete(void *cb_ctx)
    1251             : {
    1252           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = cb_ctx;
    1253             :         struct spdk_nvmf_ctrlr *ctrlr;
    1254             :         /* Store cb args since cb_ctx can be freed in _nvmf_ctrlr_free_from_qpair */
    1255           0 :         nvmf_qpair_disconnect_cb cb_fn = qpair_ctx->cb_fn;
    1256           0 :         void *cb_arg = qpair_ctx->ctx;
    1257           0 :         struct spdk_thread *cb_thread = qpair_ctx->thread;
    1258             : 
    1259           0 :         ctrlr = qpair_ctx->ctrlr;
    1260           0 :         SPDK_DEBUGLOG(nvmf, "Finish destroying qid %u\n", qpair_ctx->qid);
    1261             : 
    1262           0 :         if (ctrlr) {
    1263           0 :                 if (qpair_ctx->qid == 0) {
    1264             :                         /* Admin qpair is removed, so set the pointer to NULL.
    1265             :                          * This operation is safe since we are on ctrlr thread now, admin qpair's thread is the same
    1266             :                          * as controller's thread */
    1267           0 :                         assert(ctrlr->thread == spdk_get_thread());
    1268           0 :                         ctrlr->admin_qpair = NULL;
    1269             :                 }
    1270             :                 /* Free qpair id from controller's bit mask and destroy the controller if it is the last qpair */
    1271           0 :                 if (ctrlr->thread) {
    1272           0 :                         spdk_thread_send_msg(ctrlr->thread, _nvmf_ctrlr_free_from_qpair, qpair_ctx);
    1273             :                 } else {
    1274           0 :                         _nvmf_ctrlr_free_from_qpair(qpair_ctx);
    1275             :                 }
    1276             :         } else {
    1277           0 :                 free(qpair_ctx);
    1278             :         }
    1279             : 
    1280           0 :         if (cb_fn) {
    1281           0 :                 spdk_thread_send_msg(cb_thread, cb_fn, cb_arg);
    1282             :         }
    1283           0 : }
    1284             : 
    1285             : void
    1286           0 : spdk_nvmf_poll_group_remove(struct spdk_nvmf_qpair *qpair)
    1287             : {
    1288             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1289             :         int rc;
    1290             : 
    1291             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_remove_qpair, qpair,
    1292             :                                  spdk_thread_get_id(qpair->group->thread));
    1293           0 :         nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR);
    1294             : 
    1295             :         /* Find the tgroup and remove the qpair from the tgroup */
    1296           0 :         TAILQ_FOREACH(tgroup, &qpair->group->tgroups, link) {
    1297           0 :                 if (tgroup->transport == qpair->transport) {
    1298           0 :                         rc = nvmf_transport_poll_group_remove(tgroup, qpair);
    1299           0 :                         if (rc && (rc != ENOTSUP)) {
    1300           0 :                                 SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n",
    1301             :                                             qpair, tgroup);
    1302             :                         }
    1303           0 :                         break;
    1304             :                 }
    1305             :         }
    1306             : 
    1307           0 :         TAILQ_REMOVE(&qpair->group->qpairs, qpair, link);
    1308           0 :         qpair->group = NULL;
    1309           0 : }
    1310             : 
    1311             : static void
    1312           0 : _nvmf_qpair_sgroup_req_clean(struct spdk_nvmf_subsystem_poll_group *sgroup,
    1313             :                              const struct spdk_nvmf_qpair *qpair)
    1314             : {
    1315             :         struct spdk_nvmf_request *req, *tmp;
    1316           0 :         TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1317           0 :                 if (req->qpair == qpair) {
    1318           0 :                         TAILQ_REMOVE(&sgroup->queued, req, link);
    1319           0 :                         if (nvmf_transport_req_free(req)) {
    1320           0 :                                 SPDK_ERRLOG("Transport request free error!\n");
    1321             :                         }
    1322             :                 }
    1323             :         }
    1324           0 : }
    1325             : 
    1326             : static void
    1327           0 : _nvmf_qpair_destroy(void *ctx, int status)
    1328             : {
    1329           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1330           0 :         struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair;
    1331           0 :         struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr;
    1332             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1333             :         uint32_t sid;
    1334             : 
    1335           0 :         assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING);
    1336           0 :         qpair_ctx->qid = qpair->qid;
    1337             : 
    1338           0 :         if (qpair->connect_received) {
    1339           0 :                 if (0 == qpair->qid) {
    1340           0 :                         assert(qpair->group->stat.current_admin_qpairs > 0);
    1341           0 :                         qpair->group->stat.current_admin_qpairs--;
    1342             :                 } else {
    1343           0 :                         assert(qpair->group->stat.current_io_qpairs > 0);
    1344           0 :                         qpair->group->stat.current_io_qpairs--;
    1345             :                 }
    1346             :         } else {
    1347           0 :                 pthread_mutex_lock(&qpair->group->mutex);
    1348           0 :                 qpair->group->current_unassociated_qpairs--;
    1349           0 :                 pthread_mutex_unlock(&qpair->group->mutex);
    1350             :         }
    1351             : 
    1352           0 :         if (ctrlr) {
    1353           0 :                 sgroup = &qpair->group->sgroups[ctrlr->subsys->id];
    1354           0 :                 _nvmf_qpair_sgroup_req_clean(sgroup, qpair);
    1355             :         } else {
    1356           0 :                 for (sid = 0; sid < qpair->group->num_sgroups; sid++) {
    1357           0 :                         sgroup = &qpair->group->sgroups[sid];
    1358           0 :                         assert(sgroup != NULL);
    1359           0 :                         _nvmf_qpair_sgroup_req_clean(sgroup, qpair);
    1360             :                 }
    1361             :         }
    1362             : 
    1363           0 :         qpair_ctx->ctrlr = ctrlr;
    1364           0 :         spdk_nvmf_poll_group_remove(qpair);
    1365           0 :         nvmf_transport_qpair_fini(qpair, _nvmf_transport_qpair_fini_complete, qpair_ctx);
    1366           0 : }
    1367             : 
    1368             : static void
    1369           0 : _nvmf_qpair_disconnect_msg(void *ctx)
    1370             : {
    1371           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1372             : 
    1373           0 :         spdk_nvmf_qpair_disconnect(qpair_ctx->qpair, qpair_ctx->cb_fn, qpair_ctx->ctx);
    1374           0 :         free(ctx);
    1375           0 : }
    1376             : 
    1377           1 : SPDK_LOG_DEPRECATION_REGISTER(spdk_nvmf_qpair_disconnect, "cb_fn and ctx are deprecated", "v24.05",
    1378             :                               0);
    1379             : 
    1380             : int
    1381           0 : spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair, nvmf_qpair_disconnect_cb cb_fn, void *ctx)
    1382             : {
    1383           0 :         struct spdk_nvmf_poll_group *group = qpair->group;
    1384             :         struct nvmf_qpair_disconnect_ctx *qpair_ctx;
    1385             : 
    1386           0 :         if (__atomic_test_and_set(&qpair->disconnect_started, __ATOMIC_RELAXED)) {
    1387           0 :                 return -EINPROGRESS;
    1388             :         }
    1389             : 
    1390           0 :         if (cb_fn || ctx) {
    1391           0 :                 SPDK_LOG_DEPRECATED(spdk_nvmf_qpair_disconnect);
    1392             :         }
    1393             : 
    1394             :         /* If we get a qpair in the uninitialized state, we can just destroy it immediately */
    1395           0 :         if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) {
    1396           0 :                 nvmf_transport_qpair_fini(qpair, NULL, NULL);
    1397           0 :                 if (cb_fn) {
    1398           0 :                         cb_fn(ctx);
    1399             :                 }
    1400           0 :                 return 0;
    1401             :         }
    1402             : 
    1403           0 :         assert(group != NULL);
    1404           0 :         if (spdk_get_thread() != group->thread) {
    1405             :                 /* clear the atomic so we can set it on the next call on the proper thread. */
    1406           0 :                 __atomic_clear(&qpair->disconnect_started, __ATOMIC_RELAXED);
    1407           0 :                 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx));
    1408           0 :                 if (!qpair_ctx) {
    1409           0 :                         SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n");
    1410           0 :                         return -ENOMEM;
    1411             :                 }
    1412           0 :                 qpair_ctx->qpair = qpair;
    1413           0 :                 qpair_ctx->cb_fn = cb_fn;
    1414           0 :                 qpair_ctx->thread = group->thread;
    1415           0 :                 qpair_ctx->ctx = ctx;
    1416           0 :                 spdk_thread_send_msg(group->thread, _nvmf_qpair_disconnect_msg, qpair_ctx);
    1417           0 :                 return 0;
    1418             :         }
    1419             : 
    1420             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_qpair_disconnect, qpair, spdk_thread_get_id(group->thread));
    1421           0 :         assert(qpair->state == SPDK_NVMF_QPAIR_ACTIVE);
    1422           0 :         nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING);
    1423             : 
    1424           0 :         qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx));
    1425           0 :         if (!qpair_ctx) {
    1426           0 :                 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n");
    1427           0 :                 return -ENOMEM;
    1428             :         }
    1429             : 
    1430           0 :         qpair_ctx->qpair = qpair;
    1431           0 :         qpair_ctx->cb_fn = cb_fn;
    1432           0 :         qpair_ctx->thread = group->thread;
    1433           0 :         qpair_ctx->ctx = ctx;
    1434             : 
    1435             :         /* Check for outstanding I/O */
    1436           0 :         if (!TAILQ_EMPTY(&qpair->outstanding)) {
    1437             :                 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_drain_qpair, qpair, spdk_thread_get_id(group->thread));
    1438           0 :                 qpair->state_cb = _nvmf_qpair_destroy;
    1439           0 :                 qpair->state_cb_arg = qpair_ctx;
    1440           0 :                 nvmf_qpair_abort_pending_zcopy_reqs(qpair);
    1441           0 :                 nvmf_qpair_free_aer(qpair);
    1442           0 :                 return 0;
    1443             :         }
    1444             : 
    1445           0 :         _nvmf_qpair_destroy(qpair_ctx, 0);
    1446             : 
    1447           0 :         return 0;
    1448             : }
    1449             : 
    1450             : int
    1451           0 : spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
    1452             :                               struct spdk_nvme_transport_id *trid)
    1453             : {
    1454           0 :         memset(trid, 0, sizeof(*trid));
    1455           0 :         return nvmf_transport_qpair_get_peer_trid(qpair, trid);
    1456             : }
    1457             : 
    1458             : int
    1459           0 : spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
    1460             :                                struct spdk_nvme_transport_id *trid)
    1461             : {
    1462           0 :         memset(trid, 0, sizeof(*trid));
    1463           0 :         return nvmf_transport_qpair_get_local_trid(qpair, trid);
    1464             : }
    1465             : 
    1466             : int
    1467           0 : spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
    1468             :                                 struct spdk_nvme_transport_id *trid)
    1469             : {
    1470           0 :         memset(trid, 0, sizeof(*trid));
    1471           0 :         return nvmf_transport_qpair_get_listen_trid(qpair, trid);
    1472             : }
    1473             : 
    1474             : static int
    1475           1 : poll_group_update_subsystem(struct spdk_nvmf_poll_group *group,
    1476             :                             struct spdk_nvmf_subsystem *subsystem)
    1477             : {
    1478             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1479             :         uint32_t new_num_ns, old_num_ns;
    1480             :         uint32_t i, j;
    1481             :         struct spdk_nvmf_ns *ns;
    1482             :         struct spdk_nvmf_registrant *reg, *tmp;
    1483             :         struct spdk_io_channel *ch;
    1484             :         struct spdk_nvmf_subsystem_pg_ns_info *ns_info;
    1485             :         struct spdk_nvmf_ctrlr *ctrlr;
    1486             :         bool ns_changed;
    1487             : 
    1488             :         /* Make sure our poll group has memory for this subsystem allocated */
    1489           1 :         if (subsystem->id >= group->num_sgroups) {
    1490           0 :                 return -ENOMEM;
    1491             :         }
    1492             : 
    1493           1 :         sgroup = &group->sgroups[subsystem->id];
    1494             : 
    1495             :         /* Make sure the array of namespace information is the correct size */
    1496           1 :         new_num_ns = subsystem->max_nsid;
    1497           1 :         old_num_ns = sgroup->num_ns;
    1498             : 
    1499           1 :         ns_changed = false;
    1500             : 
    1501           1 :         if (old_num_ns == 0) {
    1502           1 :                 if (new_num_ns > 0) {
    1503             :                         /* First allocation */
    1504           1 :                         sgroup->ns_info = calloc(new_num_ns, sizeof(struct spdk_nvmf_subsystem_pg_ns_info));
    1505           1 :                         if (!sgroup->ns_info) {
    1506           0 :                                 return -ENOMEM;
    1507             :                         }
    1508             :                 }
    1509           0 :         } else if (new_num_ns > old_num_ns) {
    1510             :                 void *buf;
    1511             : 
    1512             :                 /* Make the array larger */
    1513           0 :                 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info));
    1514           0 :                 if (!buf) {
    1515           0 :                         return -ENOMEM;
    1516             :                 }
    1517             : 
    1518           0 :                 sgroup->ns_info = buf;
    1519             : 
    1520             :                 /* Null out the new namespace information slots */
    1521           0 :                 for (i = old_num_ns; i < new_num_ns; i++) {
    1522           0 :                         memset(&sgroup->ns_info[i], 0, sizeof(struct spdk_nvmf_subsystem_pg_ns_info));
    1523             :                 }
    1524           0 :         } else if (new_num_ns < old_num_ns) {
    1525             :                 void *buf;
    1526             : 
    1527             :                 /* Free the extra I/O channels */
    1528           0 :                 for (i = new_num_ns; i < old_num_ns; i++) {
    1529           0 :                         ns_info = &sgroup->ns_info[i];
    1530             : 
    1531           0 :                         if (ns_info->channel) {
    1532           0 :                                 spdk_put_io_channel(ns_info->channel);
    1533           0 :                                 ns_info->channel = NULL;
    1534             :                         }
    1535             :                 }
    1536             : 
    1537             :                 /* Make the array smaller */
    1538           0 :                 if (new_num_ns > 0) {
    1539           0 :                         buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info));
    1540           0 :                         if (!buf) {
    1541           0 :                                 return -ENOMEM;
    1542             :                         }
    1543           0 :                         sgroup->ns_info = buf;
    1544             :                 } else {
    1545           0 :                         free(sgroup->ns_info);
    1546           0 :                         sgroup->ns_info = NULL;
    1547             :                 }
    1548             :         }
    1549             : 
    1550           1 :         sgroup->num_ns = new_num_ns;
    1551             : 
    1552             :         /* Detect bdevs that were added or removed */
    1553           2 :         for (i = 0; i < sgroup->num_ns; i++) {
    1554           1 :                 ns = subsystem->ns[i];
    1555           1 :                 ns_info = &sgroup->ns_info[i];
    1556           1 :                 ch = ns_info->channel;
    1557             : 
    1558           1 :                 if (ns == NULL && ch == NULL) {
    1559             :                         /* Both NULL. Leave empty */
    1560           1 :                 } else if (ns == NULL && ch != NULL) {
    1561             :                         /* There was a channel here, but the namespace is gone. */
    1562           0 :                         ns_changed = true;
    1563           0 :                         spdk_put_io_channel(ch);
    1564           0 :                         ns_info->channel = NULL;
    1565           1 :                 } else if (ns != NULL && ch == NULL) {
    1566             :                         /* A namespace appeared but there is no channel yet */
    1567           1 :                         ns_changed = true;
    1568           1 :                         ch = spdk_bdev_get_io_channel(ns->desc);
    1569           1 :                         if (ch == NULL) {
    1570           0 :                                 SPDK_ERRLOG("Could not allocate I/O channel.\n");
    1571           0 :                                 return -ENOMEM;
    1572             :                         }
    1573           1 :                         ns_info->channel = ch;
    1574           0 :                 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) {
    1575             :                         /* A namespace was here before, but was replaced by a new one. */
    1576           0 :                         ns_changed = true;
    1577           0 :                         spdk_put_io_channel(ns_info->channel);
    1578           0 :                         memset(ns_info, 0, sizeof(*ns_info));
    1579             : 
    1580           0 :                         ch = spdk_bdev_get_io_channel(ns->desc);
    1581           0 :                         if (ch == NULL) {
    1582           0 :                                 SPDK_ERRLOG("Could not allocate I/O channel.\n");
    1583           0 :                                 return -ENOMEM;
    1584             :                         }
    1585           0 :                         ns_info->channel = ch;
    1586           0 :                 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) {
    1587             :                         /* Namespace is still there but size has changed */
    1588           0 :                         SPDK_DEBUGLOG(nvmf, "Namespace resized: subsystem_id %u,"
    1589             :                                       " nsid %u, pg %p, old %" PRIu64 ", new %" PRIu64 "\n",
    1590             :                                       subsystem->id,
    1591             :                                       ns->nsid,
    1592             :                                       group,
    1593             :                                       ns_info->num_blocks,
    1594             :                                       spdk_bdev_get_num_blocks(ns->bdev));
    1595           0 :                         ns_changed = true;
    1596             :                 }
    1597             : 
    1598           1 :                 if (ns == NULL) {
    1599           0 :                         memset(ns_info, 0, sizeof(*ns_info));
    1600             :                 } else {
    1601           1 :                         ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev);
    1602           1 :                         ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev);
    1603           1 :                         ns_info->crkey = ns->crkey;
    1604           1 :                         ns_info->rtype = ns->rtype;
    1605           1 :                         if (ns->holder) {
    1606           0 :                                 ns_info->holder_id = ns->holder->hostid;
    1607             :                         }
    1608             : 
    1609           1 :                         memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid));
    1610           1 :                         j = 0;
    1611           1 :                         TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) {
    1612           0 :                                 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) {
    1613           0 :                                         SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS);
    1614           0 :                                         return -EINVAL;
    1615             :                                 }
    1616           0 :                                 ns_info->reg_hostid[j++] = reg->hostid;
    1617             :                         }
    1618             :                 }
    1619             :         }
    1620             : 
    1621           1 :         if (ns_changed) {
    1622           1 :                 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) {
    1623           0 :                         if (ctrlr->thread != spdk_get_thread()) {
    1624           0 :                                 continue;
    1625             :                         }
    1626             :                         /* It is possible that a ctrlr was added but the admin_qpair hasn't been
    1627             :                          * assigned yet.
    1628             :                          */
    1629           0 :                         if (!ctrlr->admin_qpair) {
    1630           0 :                                 continue;
    1631             :                         }
    1632           0 :                         if (ctrlr->admin_qpair->group == group) {
    1633           0 :                                 nvmf_ctrlr_async_event_ns_notice(ctrlr);
    1634           0 :                                 nvmf_ctrlr_async_event_ana_change_notice(ctrlr);
    1635             :                         }
    1636             :                 }
    1637             :         }
    1638             : 
    1639           1 :         return 0;
    1640             : }
    1641             : 
    1642             : int
    1643           0 : nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group,
    1644             :                                  struct spdk_nvmf_subsystem *subsystem)
    1645             : {
    1646           0 :         return poll_group_update_subsystem(group, subsystem);
    1647             : }
    1648             : 
    1649             : int
    1650           1 : nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group,
    1651             :                               struct spdk_nvmf_subsystem *subsystem,
    1652             :                               spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1653             : {
    1654           1 :         int rc = 0;
    1655           1 :         struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id];
    1656             :         uint32_t i;
    1657             : 
    1658           1 :         TAILQ_INIT(&sgroup->queued);
    1659             : 
    1660           1 :         rc = poll_group_update_subsystem(group, subsystem);
    1661           1 :         if (rc) {
    1662           0 :                 nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL);
    1663           0 :                 goto fini;
    1664             :         }
    1665             : 
    1666           1 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1667             : 
    1668           2 :         for (i = 0; i < sgroup->num_ns; i++) {
    1669           1 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1670             :         }
    1671             : 
    1672           1 : fini:
    1673           1 :         if (cb_fn) {
    1674           0 :                 cb_fn(cb_arg, rc);
    1675             :         }
    1676             : 
    1677             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_subsystem, spdk_thread_get_id(group->thread),
    1678             :                                  subsystem->subnqn);
    1679             : 
    1680           1 :         return rc;
    1681             : }
    1682             : 
    1683             : static void
    1684           0 : _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status)
    1685             : {
    1686           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
    1687             :         struct spdk_nvmf_subsystem *subsystem;
    1688             :         struct spdk_nvmf_poll_group *group;
    1689             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1690           0 :         spdk_nvmf_poll_group_mod_done cpl_fn = NULL;
    1691           0 :         void *cpl_ctx = NULL;
    1692             :         uint32_t nsid;
    1693             : 
    1694           0 :         group = qpair_ctx->group;
    1695           0 :         subsystem = qpair_ctx->subsystem;
    1696           0 :         cpl_fn = qpair_ctx->cpl_fn;
    1697           0 :         cpl_ctx = qpair_ctx->cpl_ctx;
    1698           0 :         sgroup = &group->sgroups[subsystem->id];
    1699             : 
    1700           0 :         if (status) {
    1701           0 :                 goto fini;
    1702             :         }
    1703             : 
    1704           0 :         for (nsid = 0; nsid < sgroup->num_ns; nsid++) {
    1705           0 :                 if (sgroup->ns_info[nsid].channel) {
    1706           0 :                         spdk_put_io_channel(sgroup->ns_info[nsid].channel);
    1707           0 :                         sgroup->ns_info[nsid].channel = NULL;
    1708             :                 }
    1709             :         }
    1710             : 
    1711           0 :         sgroup->num_ns = 0;
    1712           0 :         free(sgroup->ns_info);
    1713           0 :         sgroup->ns_info = NULL;
    1714           0 : fini:
    1715           0 :         free(qpair_ctx);
    1716           0 :         if (cpl_fn) {
    1717           0 :                 cpl_fn(cpl_ctx, status);
    1718             :         }
    1719           0 : }
    1720             : 
    1721             : static void nvmf_poll_group_remove_subsystem_msg(void *ctx);
    1722             : 
    1723             : static void
    1724           0 : nvmf_poll_group_remove_subsystem_msg(void *ctx)
    1725             : {
    1726             :         struct spdk_nvmf_qpair *qpair, *qpair_tmp;
    1727             :         struct spdk_nvmf_subsystem *subsystem;
    1728             :         struct spdk_nvmf_poll_group *group;
    1729           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
    1730           0 :         bool qpairs_found = false;
    1731           0 :         int rc = 0;
    1732             : 
    1733           0 :         group = qpair_ctx->group;
    1734           0 :         subsystem = qpair_ctx->subsystem;
    1735             : 
    1736           0 :         TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) {
    1737           0 :                 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) {
    1738           0 :                         qpairs_found = true;
    1739           0 :                         rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL);
    1740           0 :                         if (rc && rc != -EINPROGRESS) {
    1741           0 :                                 break;
    1742             :                         }
    1743             :                 }
    1744             :         }
    1745             : 
    1746           0 :         if (!qpairs_found) {
    1747           0 :                 _nvmf_poll_group_remove_subsystem_cb(ctx, 0);
    1748           0 :                 return;
    1749             :         }
    1750             : 
    1751             :         /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */
    1752           0 :         spdk_thread_send_msg(spdk_get_thread(), nvmf_poll_group_remove_subsystem_msg, ctx);
    1753             : }
    1754             : 
    1755             : void
    1756           0 : nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group,
    1757             :                                  struct spdk_nvmf_subsystem *subsystem,
    1758             :                                  spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1759             : {
    1760             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1761             :         struct nvmf_qpair_disconnect_many_ctx *ctx;
    1762             :         uint32_t i;
    1763             : 
    1764             :         SPDK_DTRACE_PROBE3_TICKS(nvmf_poll_group_remove_subsystem, group, spdk_thread_get_id(group->thread),
    1765             :                                  subsystem->subnqn);
    1766             : 
    1767           0 :         ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx));
    1768           0 :         if (!ctx) {
    1769           0 :                 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n");
    1770           0 :                 if (cb_fn) {
    1771           0 :                         cb_fn(cb_arg, -1);
    1772             :                 }
    1773           0 :                 return;
    1774             :         }
    1775             : 
    1776           0 :         ctx->group = group;
    1777           0 :         ctx->subsystem = subsystem;
    1778           0 :         ctx->cpl_fn = cb_fn;
    1779           0 :         ctx->cpl_ctx = cb_arg;
    1780             : 
    1781           0 :         sgroup = &group->sgroups[subsystem->id];
    1782           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE;
    1783             : 
    1784           0 :         for (i = 0; i < sgroup->num_ns; i++) {
    1785           0 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_INACTIVE;
    1786             :         }
    1787             : 
    1788           0 :         nvmf_poll_group_remove_subsystem_msg(ctx);
    1789             : }
    1790             : 
    1791             : void
    1792           0 : nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group,
    1793             :                                 struct spdk_nvmf_subsystem *subsystem,
    1794             :                                 uint32_t nsid,
    1795             :                                 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1796             : {
    1797             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1798           0 :         struct spdk_nvmf_subsystem_pg_ns_info *ns_info = NULL;
    1799           0 :         int rc = 0;
    1800             :         uint32_t i;
    1801             : 
    1802           0 :         if (subsystem->id >= group->num_sgroups) {
    1803           0 :                 rc = -1;
    1804           0 :                 goto fini;
    1805             :         }
    1806             : 
    1807           0 :         sgroup = &group->sgroups[subsystem->id];
    1808           0 :         if (sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED) {
    1809           0 :                 goto fini;
    1810             :         }
    1811           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1812             : 
    1813           0 :         if (nsid == SPDK_NVME_GLOBAL_NS_TAG) {
    1814           0 :                 for (i = 0; i < sgroup->num_ns; i++) {
    1815           0 :                         ns_info = &sgroup->ns_info[i];
    1816           0 :                         ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1817             :                 }
    1818             :         } else {
    1819             :                 /* NOTE: This implicitly also checks for 0, since 0 - 1 wraps around to UINT32_MAX. */
    1820           0 :                 if (nsid - 1 < sgroup->num_ns) {
    1821           0 :                         ns_info  = &sgroup->ns_info[nsid - 1];
    1822           0 :                         ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1823             :                 }
    1824             :         }
    1825             : 
    1826           0 :         if (sgroup->mgmt_io_outstanding > 0) {
    1827           0 :                 assert(sgroup->cb_fn == NULL);
    1828           0 :                 sgroup->cb_fn = cb_fn;
    1829           0 :                 assert(sgroup->cb_arg == NULL);
    1830           0 :                 sgroup->cb_arg = cb_arg;
    1831           0 :                 return;
    1832             :         }
    1833             : 
    1834           0 :         if (nsid == SPDK_NVME_GLOBAL_NS_TAG) {
    1835           0 :                 for (i = 0; i < sgroup->num_ns; i++) {
    1836           0 :                         ns_info = &sgroup->ns_info[i];
    1837             : 
    1838           0 :                         if (ns_info->io_outstanding > 0) {
    1839           0 :                                 assert(sgroup->cb_fn == NULL);
    1840           0 :                                 sgroup->cb_fn = cb_fn;
    1841           0 :                                 assert(sgroup->cb_arg == NULL);
    1842           0 :                                 sgroup->cb_arg = cb_arg;
    1843           0 :                                 return;
    1844             :                         }
    1845             :                 }
    1846             :         } else {
    1847           0 :                 if (ns_info != NULL && ns_info->io_outstanding > 0) {
    1848           0 :                         assert(sgroup->cb_fn == NULL);
    1849           0 :                         sgroup->cb_fn = cb_fn;
    1850           0 :                         assert(sgroup->cb_arg == NULL);
    1851           0 :                         sgroup->cb_arg = cb_arg;
    1852           0 :                         return;
    1853             :                 }
    1854             :         }
    1855             : 
    1856           0 :         assert(sgroup->mgmt_io_outstanding == 0);
    1857           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED;
    1858           0 : fini:
    1859           0 :         if (cb_fn) {
    1860           0 :                 cb_fn(cb_arg, rc);
    1861             :         }
    1862             : }
    1863             : 
    1864             : void
    1865           0 : nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group,
    1866             :                                  struct spdk_nvmf_subsystem *subsystem,
    1867             :                                  spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1868             : {
    1869             :         struct spdk_nvmf_request *req, *tmp;
    1870             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1871           0 :         int rc = 0;
    1872             :         uint32_t i;
    1873             : 
    1874           0 :         if (subsystem->id >= group->num_sgroups) {
    1875           0 :                 rc = -1;
    1876           0 :                 goto fini;
    1877             :         }
    1878             : 
    1879           0 :         sgroup = &group->sgroups[subsystem->id];
    1880             : 
    1881           0 :         if (sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE) {
    1882           0 :                 goto fini;
    1883             :         }
    1884             : 
    1885           0 :         rc = poll_group_update_subsystem(group, subsystem);
    1886           0 :         if (rc) {
    1887           0 :                 goto fini;
    1888             :         }
    1889             : 
    1890           0 :         for (i = 0; i < sgroup->num_ns; i++) {
    1891           0 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1892             :         }
    1893             : 
    1894           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1895             : 
    1896             :         /* Release all queued requests */
    1897           0 :         TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1898           0 :                 TAILQ_REMOVE(&sgroup->queued, req, link);
    1899           0 :                 if (spdk_nvmf_request_using_zcopy(req)) {
    1900           0 :                         spdk_nvmf_request_zcopy_start(req);
    1901           0 :                 } else if (nvmf_request_is_fabric_connect(req)) {
    1902           0 :                         spdk_nvmf_request_exec_fabrics(req);
    1903             :                 } else {
    1904           0 :                         spdk_nvmf_request_exec(req);
    1905             :                 }
    1906             : 
    1907             :         }
    1908           0 : fini:
    1909           0 :         if (cb_fn) {
    1910           0 :                 cb_fn(cb_arg, rc);
    1911             :         }
    1912           0 : }
    1913             : 
    1914             : 
    1915             : struct spdk_nvmf_poll_group *
    1916           0 : spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair)
    1917             : {
    1918             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1919             : 
    1920           0 :         tgroup = nvmf_transport_get_optimal_poll_group(qpair->transport, qpair);
    1921             : 
    1922           0 :         if (tgroup == NULL) {
    1923           0 :                 return NULL;
    1924             :         }
    1925             : 
    1926           0 :         return tgroup->group;
    1927             : }
    1928             : 
    1929             : void
    1930           0 : spdk_nvmf_poll_group_dump_stat(struct spdk_nvmf_poll_group *group, struct spdk_json_write_ctx *w)
    1931             : {
    1932             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1933             : 
    1934           0 :         spdk_json_write_object_begin(w);
    1935             : 
    1936           0 :         spdk_json_write_named_string(w, "name", spdk_thread_get_name(spdk_get_thread()));
    1937           0 :         spdk_json_write_named_uint32(w, "admin_qpairs", group->stat.admin_qpairs);
    1938           0 :         spdk_json_write_named_uint32(w, "io_qpairs", group->stat.io_qpairs);
    1939           0 :         spdk_json_write_named_uint32(w, "current_admin_qpairs", group->stat.current_admin_qpairs);
    1940           0 :         spdk_json_write_named_uint32(w, "current_io_qpairs", group->stat.current_io_qpairs);
    1941           0 :         spdk_json_write_named_uint64(w, "pending_bdev_io", group->stat.pending_bdev_io);
    1942           0 :         spdk_json_write_named_uint64(w, "completed_nvme_io", group->stat.completed_nvme_io);
    1943             : 
    1944           0 :         spdk_json_write_named_array_begin(w, "transports");
    1945             : 
    1946           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
    1947           0 :                 spdk_json_write_object_begin(w);
    1948             :                 /*
    1949             :                  * The trtype field intentionally contains a transport name as this is more informative.
    1950             :                  * The field has not been renamed for backward compatibility.
    1951             :                  */
    1952           0 :                 spdk_json_write_named_string(w, "trtype", spdk_nvmf_get_transport_name(tgroup->transport));
    1953             : 
    1954           0 :                 if (tgroup->transport->ops->poll_group_dump_stat) {
    1955           0 :                         tgroup->transport->ops->poll_group_dump_stat(tgroup, w);
    1956             :                 }
    1957             : 
    1958           0 :                 spdk_json_write_object_end(w);
    1959             :         }
    1960             : 
    1961           0 :         spdk_json_write_array_end(w);
    1962           0 :         spdk_json_write_object_end(w);
    1963           0 : }

Generated by: LCOV version 1.15