LCOV - code coverage report
Current view: top level - lib/nvmf - nvmf.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 106 938 11.3 %
Date: 2024-07-15 15:53:01 Functions: 7 67 10.4 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2018-2019, 2021 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2021, 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  */
       6             : 
       7             : #include "spdk/stdinc.h"
       8             : 
       9             : #include "spdk/bdev.h"
      10             : #include "spdk/bit_array.h"
      11             : #include "spdk/thread.h"
      12             : #include "spdk/nvmf.h"
      13             : #include "spdk/endian.h"
      14             : #include "spdk/string.h"
      15             : #include "spdk/log.h"
      16             : #include "spdk_internal/usdt.h"
      17             : 
      18             : #include "nvmf_internal.h"
      19             : #include "transport.h"
      20             : 
      21           1 : SPDK_LOG_REGISTER_COMPONENT(nvmf)
      22             : 
      23             : #define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024
      24             : 
      25             : static TAILQ_HEAD(, spdk_nvmf_tgt) g_nvmf_tgts = TAILQ_HEAD_INITIALIZER(g_nvmf_tgts);
      26             : 
      27             : typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status);
      28             : 
      29             : /* supplied to a single call to nvmf_qpair_disconnect */
      30             : struct nvmf_qpair_disconnect_ctx {
      31             :         struct spdk_nvmf_qpair *qpair;
      32             :         struct spdk_nvmf_ctrlr *ctrlr;
      33             :         uint16_t qid;
      34             : };
      35             : 
      36             : /*
      37             :  * There are several times when we need to iterate through the list of all qpairs and selectively delete them.
      38             :  * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from
      39             :  * to enable calling nvmf_qpair_disconnect on the next desired qpair.
      40             :  */
      41             : struct nvmf_qpair_disconnect_many_ctx {
      42             :         struct spdk_nvmf_subsystem *subsystem;
      43             :         struct spdk_nvmf_poll_group *group;
      44             :         spdk_nvmf_poll_group_mod_done cpl_fn;
      45             :         void *cpl_ctx;
      46             : };
      47             : 
      48             : static struct spdk_nvmf_referral *
      49           0 : nvmf_tgt_find_referral(struct spdk_nvmf_tgt *tgt,
      50             :                        const struct spdk_nvme_transport_id *trid)
      51             : {
      52             :         struct spdk_nvmf_referral *referral;
      53             : 
      54           0 :         TAILQ_FOREACH(referral, &tgt->referrals, link) {
      55           0 :                 if (spdk_nvme_transport_id_compare(&referral->trid, trid) == 0) {
      56           0 :                         return referral;
      57             :                 }
      58             :         }
      59             : 
      60           0 :         return NULL;
      61             : }
      62             : 
      63             : int
      64           0 : spdk_nvmf_tgt_add_referral(struct spdk_nvmf_tgt *tgt,
      65             :                            const struct spdk_nvmf_referral_opts *uopts)
      66             : {
      67             :         struct spdk_nvmf_referral *referral;
      68           0 :         struct spdk_nvmf_referral_opts opts = {};
      69           0 :         struct spdk_nvme_transport_id *trid = &opts.trid;
      70             : 
      71           0 :         memcpy(&opts, uopts, spdk_min(uopts->size, sizeof(opts)));
      72           0 :         if (trid->subnqn[0] == '\0') {
      73           0 :                 snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
      74             :         }
      75             : 
      76           0 :         if (!nvmf_nqn_is_valid(trid->subnqn)) {
      77           0 :                 SPDK_ERRLOG("Invalid subsystem NQN\n");
      78           0 :                 return -EINVAL;
      79             :         }
      80             : 
      81             :         /* If the entry already exists, just ignore it. */
      82           0 :         if (nvmf_tgt_find_referral(tgt, trid)) {
      83           0 :                 return 0;
      84             :         }
      85             : 
      86           0 :         referral = calloc(1, sizeof(*referral));
      87           0 :         if (!referral) {
      88           0 :                 SPDK_ERRLOG("Failed to allocate memory for a referral\n");
      89           0 :                 return -ENOMEM;
      90             :         }
      91             : 
      92           0 :         referral->entry.subtype = nvmf_nqn_is_discovery(trid->subnqn) ?
      93             :                                   SPDK_NVMF_SUBTYPE_DISCOVERY :
      94             :                                   SPDK_NVMF_SUBTYPE_NVME;
      95           0 :         referral->entry.treq.secure_channel = opts.secure_channel ?
      96           0 :                                               SPDK_NVMF_TREQ_SECURE_CHANNEL_REQUIRED :
      97             :                                               SPDK_NVMF_TREQ_SECURE_CHANNEL_NOT_REQUIRED;
      98           0 :         referral->entry.cntlid = 0xffff;
      99           0 :         referral->entry.trtype = trid->trtype;
     100           0 :         referral->entry.adrfam = trid->adrfam;
     101           0 :         memcpy(&referral->trid, trid, sizeof(struct spdk_nvme_transport_id));
     102           0 :         spdk_strcpy_pad(referral->entry.subnqn, trid->subnqn, sizeof(trid->subnqn), '\0');
     103           0 :         spdk_strcpy_pad(referral->entry.trsvcid, trid->trsvcid, sizeof(referral->entry.trsvcid), ' ');
     104           0 :         spdk_strcpy_pad(referral->entry.traddr, trid->traddr, sizeof(referral->entry.traddr), ' ');
     105             : 
     106           0 :         TAILQ_INSERT_HEAD(&tgt->referrals, referral, link);
     107           0 :         nvmf_update_discovery_log(tgt, NULL);
     108             : 
     109           0 :         return 0;
     110             : }
     111             : 
     112             : int
     113           0 : spdk_nvmf_tgt_remove_referral(struct spdk_nvmf_tgt *tgt,
     114             :                               const struct spdk_nvmf_referral_opts *uopts)
     115             : {
     116             :         struct spdk_nvmf_referral *referral;
     117           0 :         struct spdk_nvmf_referral_opts opts = {};
     118           0 :         struct spdk_nvme_transport_id *trid = &opts.trid;
     119             : 
     120           0 :         memcpy(&opts, uopts, spdk_min(uopts->size, sizeof(opts)));
     121           0 :         if (trid->subnqn[0] == '\0') {
     122           0 :                 snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
     123             :         }
     124             : 
     125           0 :         referral = nvmf_tgt_find_referral(tgt, &opts.trid);
     126           0 :         if (referral == NULL) {
     127           0 :                 return -ENOENT;
     128             :         }
     129             : 
     130           0 :         TAILQ_REMOVE(&tgt->referrals, referral, link);
     131           0 :         nvmf_update_discovery_log(tgt, NULL);
     132             : 
     133           0 :         free(referral);
     134             : 
     135           0 :         return 0;
     136             : }
     137             : 
     138             : void
     139           0 : nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair,
     140             :                      enum spdk_nvmf_qpair_state state)
     141             : {
     142           0 :         assert(qpair != NULL);
     143           0 :         assert(qpair->group->thread == spdk_get_thread());
     144             : 
     145           0 :         qpair->state = state;
     146           0 : }
     147             : 
     148             : static int
     149           0 : nvmf_poll_group_poll(void *ctx)
     150             : {
     151           0 :         struct spdk_nvmf_poll_group *group = ctx;
     152             :         int rc;
     153           0 :         int count = 0;
     154             :         struct spdk_nvmf_transport_poll_group *tgroup;
     155             : 
     156           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
     157           0 :                 rc = nvmf_transport_poll_group_poll(tgroup);
     158           0 :                 if (rc < 0) {
     159           0 :                         return SPDK_POLLER_BUSY;
     160             :                 }
     161           0 :                 count += rc;
     162             :         }
     163             : 
     164           0 :         return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
     165             : }
     166             : 
     167             : /*
     168             :  * Reset and clean up the poll group (I/O channel code will actually free the
     169             :  * group).
     170             :  */
     171             : static void
     172           1 : nvmf_tgt_cleanup_poll_group(struct spdk_nvmf_poll_group *group)
     173             : {
     174             :         struct spdk_nvmf_transport_poll_group *tgroup, *tmp;
     175             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
     176             :         uint32_t sid, nsid;
     177             : 
     178           2 :         TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) {
     179           1 :                 TAILQ_REMOVE(&group->tgroups, tgroup, link);
     180           1 :                 nvmf_transport_poll_group_destroy(tgroup);
     181             :         }
     182             : 
     183           2 :         for (sid = 0; sid < group->num_sgroups; sid++) {
     184           1 :                 sgroup = &group->sgroups[sid];
     185             : 
     186           1 :                 assert(sgroup != NULL);
     187             : 
     188           2 :                 for (nsid = 0; nsid < sgroup->num_ns; nsid++) {
     189           1 :                         if (sgroup->ns_info[nsid].channel) {
     190           1 :                                 spdk_put_io_channel(sgroup->ns_info[nsid].channel);
     191           1 :                                 sgroup->ns_info[nsid].channel = NULL;
     192             :                         }
     193             :                 }
     194             : 
     195           1 :                 free(sgroup->ns_info);
     196             :         }
     197             : 
     198           1 :         free(group->sgroups);
     199             : 
     200           1 :         spdk_poller_unregister(&group->poller);
     201             : 
     202           1 :         if (group->destroy_cb_fn) {
     203           0 :                 group->destroy_cb_fn(group->destroy_cb_arg, 0);
     204             :         }
     205           1 : }
     206             : 
     207             : /*
     208             :  * Callback to unregister a poll group from the target, and clean up its state.
     209             :  */
     210             : static void
     211           1 : nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf)
     212             : {
     213           1 :         struct spdk_nvmf_tgt *tgt = io_device;
     214           1 :         struct spdk_nvmf_poll_group *group = ctx_buf;
     215             : 
     216             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group, spdk_thread_get_id(group->thread));
     217             : 
     218           1 :         pthread_mutex_lock(&tgt->mutex);
     219           1 :         TAILQ_REMOVE(&tgt->poll_groups, group, link);
     220           1 :         tgt->num_poll_groups--;
     221           1 :         pthread_mutex_unlock(&tgt->mutex);
     222             : 
     223           1 :         assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING));
     224           1 :         nvmf_tgt_cleanup_poll_group(group);
     225           1 : }
     226             : 
     227             : static int
     228           1 : nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group,
     229             :                               struct spdk_nvmf_transport *transport)
     230             : {
     231           1 :         struct spdk_nvmf_transport_poll_group *tgroup = nvmf_get_transport_poll_group(group, transport);
     232             : 
     233           1 :         if (tgroup != NULL) {
     234             :                 /* Transport already in the poll group */
     235           0 :                 return 0;
     236             :         }
     237             : 
     238           1 :         tgroup = nvmf_transport_poll_group_create(transport, group);
     239           1 :         if (!tgroup) {
     240           0 :                 SPDK_ERRLOG("Unable to create poll group for transport\n");
     241           0 :                 return -1;
     242             :         }
     243             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_transport_poll_group_create, transport,
     244             :                                  spdk_thread_get_id(group->thread));
     245             : 
     246           1 :         tgroup->group = group;
     247           1 :         TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link);
     248             : 
     249           1 :         return 0;
     250             : }
     251             : 
     252             : static void
     253           0 : nvmf_tgt_poller_set_interrupt_mode(struct spdk_poller *poller, void *cb_arg, bool interrupt_mode)
     254             : {
     255           0 : }
     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             :         uint32_t i;
     266             :         int rc;
     267             : 
     268           1 :         group->tgt = tgt;
     269           1 :         TAILQ_INIT(&group->tgroups);
     270           1 :         TAILQ_INIT(&group->qpairs);
     271           1 :         group->thread = thread;
     272           1 :         pthread_mutex_init(&group->mutex, NULL);
     273             : 
     274           1 :         group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0);
     275           1 :         spdk_poller_register_interrupt(group->poller, nvmf_tgt_poller_set_interrupt_mode, NULL);
     276             : 
     277             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_create_poll_group, spdk_thread_get_id(thread));
     278             : 
     279           2 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
     280           1 :                 rc = nvmf_poll_group_add_transport(group, transport);
     281           1 :                 if (rc != 0) {
     282           0 :                         nvmf_tgt_cleanup_poll_group(group);
     283           0 :                         return rc;
     284             :                 }
     285             :         }
     286             : 
     287           1 :         group->num_sgroups = tgt->max_subsystems;
     288           1 :         group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group));
     289           1 :         if (!group->sgroups) {
     290           0 :                 nvmf_tgt_cleanup_poll_group(group);
     291           0 :                 return -ENOMEM;
     292             :         }
     293             : 
     294           2 :         for (i = 0; i < tgt->max_subsystems; i++) {
     295           1 :                 TAILQ_INIT(&group->sgroups[i].queued);
     296             :         }
     297             : 
     298           1 :         for (subsystem = spdk_nvmf_subsystem_get_first(tgt);
     299           2 :              subsystem != NULL;
     300           1 :              subsystem = spdk_nvmf_subsystem_get_next(subsystem)) {
     301           1 :                 if (nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) {
     302           0 :                         nvmf_tgt_cleanup_poll_group(group);
     303           0 :                         return -1;
     304             :                 }
     305             :         }
     306             : 
     307           1 :         pthread_mutex_lock(&tgt->mutex);
     308           1 :         tgt->num_poll_groups++;
     309           1 :         TAILQ_INSERT_TAIL(&tgt->poll_groups, group, link);
     310           1 :         pthread_mutex_unlock(&tgt->mutex);
     311             : 
     312           1 :         return 0;
     313             : }
     314             : 
     315             : static void
     316           0 : _nvmf_tgt_disconnect_qpairs(void *ctx)
     317             : {
     318             :         struct spdk_nvmf_qpair *qpair, *qpair_tmp;
     319           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
     320           0 :         struct spdk_nvmf_poll_group *group = qpair_ctx->group;
     321             :         struct spdk_io_channel *ch;
     322             :         int rc;
     323             : 
     324           0 :         TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) {
     325           0 :                 rc = spdk_nvmf_qpair_disconnect(qpair);
     326           0 :                 if (rc && rc != -EINPROGRESS) {
     327           0 :                         break;
     328             :                 }
     329             :         }
     330             : 
     331           0 :         if (TAILQ_EMPTY(&group->qpairs)) {
     332             :                 /* When the refcount from the channels reaches 0, nvmf_tgt_destroy_poll_group will be called. */
     333           0 :                 ch = spdk_io_channel_from_ctx(group);
     334           0 :                 spdk_put_io_channel(ch);
     335           0 :                 free(qpair_ctx);
     336           0 :                 return;
     337             :         }
     338             : 
     339             :         /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */
     340           0 :         spdk_thread_send_msg(spdk_get_thread(), _nvmf_tgt_disconnect_qpairs, ctx);
     341             : }
     342             : 
     343             : static void
     344           0 : nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group)
     345             : {
     346             :         struct nvmf_qpair_disconnect_many_ctx *ctx;
     347             : 
     348             :         SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group_qpairs, spdk_thread_get_id(group->thread));
     349             : 
     350           0 :         ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx));
     351           0 :         if (!ctx) {
     352           0 :                 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n");
     353           0 :                 return;
     354             :         }
     355             : 
     356           0 :         ctx->group = group;
     357           0 :         _nvmf_tgt_disconnect_qpairs(ctx);
     358             : }
     359             : 
     360             : struct spdk_nvmf_tgt *
     361           0 : spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *_opts)
     362             : {
     363             :         struct spdk_nvmf_tgt *tgt, *tmp_tgt;
     364           0 :         struct spdk_nvmf_target_opts opts = {
     365             :                 .max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS,
     366             :                 .discovery_filter = SPDK_NVMF_TGT_DISCOVERY_MATCH_ANY,
     367             :         };
     368             : 
     369           0 :         memcpy(&opts, _opts, _opts->size);
     370           0 :         if (strnlen(opts.name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) {
     371           0 :                 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH);
     372           0 :                 return NULL;
     373             :         }
     374             : 
     375           0 :         TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) {
     376           0 :                 if (!strncmp(opts.name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) {
     377           0 :                         SPDK_ERRLOG("Provided target name must be unique.\n");
     378           0 :                         return NULL;
     379             :                 }
     380             :         }
     381             : 
     382           0 :         tgt = calloc(1, sizeof(*tgt));
     383           0 :         if (!tgt) {
     384           0 :                 return NULL;
     385             :         }
     386             : 
     387           0 :         snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts.name);
     388             : 
     389           0 :         if (!opts.max_subsystems) {
     390           0 :                 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS;
     391             :         } else {
     392           0 :                 tgt->max_subsystems = opts.max_subsystems;
     393             :         }
     394             : 
     395           0 :         tgt->crdt[0] = opts.crdt[0];
     396           0 :         tgt->crdt[1] = opts.crdt[1];
     397           0 :         tgt->crdt[2] = opts.crdt[2];
     398           0 :         tgt->discovery_filter = opts.discovery_filter;
     399           0 :         tgt->discovery_genctr = 0;
     400           0 :         tgt->dhchap_digests = opts.dhchap_digests;
     401           0 :         tgt->dhchap_dhgroups = opts.dhchap_dhgroups;
     402           0 :         TAILQ_INIT(&tgt->transports);
     403           0 :         TAILQ_INIT(&tgt->poll_groups);
     404           0 :         TAILQ_INIT(&tgt->referrals);
     405           0 :         tgt->num_poll_groups = 0;
     406             : 
     407           0 :         tgt->subsystem_ids = spdk_bit_array_create(tgt->max_subsystems);
     408           0 :         if (tgt->subsystem_ids == NULL) {
     409           0 :                 free(tgt);
     410           0 :                 return NULL;
     411             :         }
     412             : 
     413           0 :         RB_INIT(&tgt->subsystems);
     414             : 
     415           0 :         pthread_mutex_init(&tgt->mutex, NULL);
     416             : 
     417           0 :         spdk_io_device_register(tgt,
     418             :                                 nvmf_tgt_create_poll_group,
     419             :                                 nvmf_tgt_destroy_poll_group,
     420             :                                 sizeof(struct spdk_nvmf_poll_group),
     421           0 :                                 tgt->name);
     422             : 
     423           0 :         tgt->state = NVMF_TGT_RUNNING;
     424             : 
     425           0 :         TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link);
     426             : 
     427           0 :         return tgt;
     428             : }
     429             : 
     430             : static void
     431           0 : _nvmf_tgt_destroy_next_transport(void *ctx)
     432             : {
     433           0 :         struct spdk_nvmf_tgt *tgt = ctx;
     434             :         struct spdk_nvmf_transport *transport;
     435             : 
     436           0 :         if (!TAILQ_EMPTY(&tgt->transports)) {
     437           0 :                 transport = TAILQ_FIRST(&tgt->transports);
     438           0 :                 TAILQ_REMOVE(&tgt->transports, transport, link);
     439           0 :                 spdk_nvmf_transport_destroy(transport, _nvmf_tgt_destroy_next_transport, tgt);
     440             :         } else {
     441           0 :                 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn = tgt->destroy_cb_fn;
     442           0 :                 void *destroy_cb_arg = tgt->destroy_cb_arg;
     443             : 
     444           0 :                 pthread_mutex_destroy(&tgt->mutex);
     445           0 :                 free(tgt);
     446             : 
     447           0 :                 if (destroy_cb_fn) {
     448           0 :                         destroy_cb_fn(destroy_cb_arg, 0);
     449             :                 }
     450             :         }
     451           0 : }
     452             : 
     453             : static void
     454           0 : nvmf_tgt_destroy_cb(void *io_device)
     455             : {
     456           0 :         struct spdk_nvmf_tgt *tgt = io_device;
     457             :         struct spdk_nvmf_subsystem *subsystem, *subsystem_next;
     458             :         int rc;
     459             :         struct spdk_nvmf_referral *referral;
     460             : 
     461           0 :         while ((referral = TAILQ_FIRST(&tgt->referrals))) {
     462           0 :                 TAILQ_REMOVE(&tgt->referrals, referral, link);
     463           0 :                 free(referral);
     464             :         }
     465             : 
     466             :         /* We will be freeing subsystems in this loop, so we always need to get the next one
     467             :          * ahead of time, since we can't call get_next() on a subsystem that's been freed.
     468             :          */
     469           0 :         for (subsystem = spdk_nvmf_subsystem_get_first(tgt),
     470           0 :              subsystem_next = spdk_nvmf_subsystem_get_next(subsystem);
     471           0 :              subsystem != NULL;
     472           0 :              subsystem = subsystem_next,
     473           0 :              subsystem_next = spdk_nvmf_subsystem_get_next(subsystem_next)) {
     474           0 :                 nvmf_subsystem_remove_all_listeners(subsystem, true);
     475             : 
     476           0 :                 rc = spdk_nvmf_subsystem_destroy(subsystem, nvmf_tgt_destroy_cb, tgt);
     477           0 :                 if (rc) {
     478           0 :                         if (rc == -EINPROGRESS) {
     479             :                                 /* If rc is -EINPROGRESS, nvmf_tgt_destroy_cb will be called again when subsystem #i
     480             :                                  * is destroyed, nvmf_tgt_destroy_cb will continue to destroy other subsystems if any */
     481           0 :                                 return;
     482             :                         } else {
     483           0 :                                 SPDK_ERRLOG("Failed to destroy subsystem %s, rc %d\n", subsystem->subnqn, rc);
     484             :                         }
     485             :                 }
     486             :         }
     487           0 :         spdk_bit_array_free(&tgt->subsystem_ids);
     488           0 :         _nvmf_tgt_destroy_next_transport(tgt);
     489             : }
     490             : 
     491             : void
     492           0 : spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt,
     493             :                       spdk_nvmf_tgt_destroy_done_fn cb_fn,
     494             :                       void *cb_arg)
     495             : {
     496           0 :         assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING));
     497             : 
     498           0 :         tgt->destroy_cb_fn = cb_fn;
     499           0 :         tgt->destroy_cb_arg = cb_arg;
     500             : 
     501           0 :         TAILQ_REMOVE(&g_nvmf_tgts, tgt, link);
     502             : 
     503           0 :         spdk_io_device_unregister(tgt, nvmf_tgt_destroy_cb);
     504           0 : }
     505             : 
     506             : const char *
     507           0 : spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt)
     508             : {
     509           0 :         return tgt->name;
     510             : }
     511             : 
     512             : struct spdk_nvmf_tgt *
     513           0 : spdk_nvmf_get_tgt(const char *name)
     514             : {
     515             :         struct spdk_nvmf_tgt *tgt;
     516           0 :         uint32_t num_targets = 0;
     517             : 
     518           0 :         TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) {
     519           0 :                 if (name) {
     520           0 :                         if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) {
     521           0 :                                 return tgt;
     522             :                         }
     523             :                 }
     524           0 :                 num_targets++;
     525             :         }
     526             : 
     527             :         /*
     528             :          * special case. If there is only one target and
     529             :          * no name was specified, return the only available
     530             :          * target. If there is more than one target, name must
     531             :          * be specified.
     532             :          */
     533           0 :         if (!name && num_targets == 1) {
     534           0 :                 return TAILQ_FIRST(&g_nvmf_tgts);
     535             :         }
     536             : 
     537           0 :         return NULL;
     538             : }
     539             : 
     540             : struct spdk_nvmf_tgt *
     541           0 : spdk_nvmf_get_first_tgt(void)
     542             : {
     543           0 :         return TAILQ_FIRST(&g_nvmf_tgts);
     544             : }
     545             : 
     546             : struct spdk_nvmf_tgt *
     547           0 : spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev)
     548             : {
     549           0 :         return TAILQ_NEXT(prev, link);
     550             : }
     551             : 
     552             : static void
     553           0 : nvmf_write_nvme_subsystem_config(struct spdk_json_write_ctx *w,
     554             :                                  struct spdk_nvmf_subsystem *subsystem)
     555             : {
     556             :         struct spdk_nvmf_host *host;
     557             :         struct spdk_nvmf_ns *ns;
     558           0 :         struct spdk_nvmf_ns_opts ns_opts;
     559             :         uint32_t max_namespaces;
     560             :         struct spdk_nvmf_transport *transport;
     561             : 
     562           0 :         assert(spdk_nvmf_subsystem_get_type(subsystem) == SPDK_NVMF_SUBTYPE_NVME);
     563             : 
     564             :         /* { */
     565           0 :         spdk_json_write_object_begin(w);
     566           0 :         spdk_json_write_named_string(w, "method", "nvmf_create_subsystem");
     567             : 
     568             :         /*     "params" : { */
     569           0 :         spdk_json_write_named_object_begin(w, "params");
     570           0 :         spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     571           0 :         spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem));
     572           0 :         spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem));
     573           0 :         spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem));
     574             : 
     575           0 :         max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem);
     576           0 :         if (max_namespaces != 0) {
     577           0 :                 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces);
     578             :         }
     579             : 
     580           0 :         spdk_json_write_named_uint32(w, "min_cntlid", spdk_nvmf_subsystem_get_min_cntlid(subsystem));
     581           0 :         spdk_json_write_named_uint32(w, "max_cntlid", spdk_nvmf_subsystem_get_max_cntlid(subsystem));
     582           0 :         spdk_json_write_named_bool(w, "ana_reporting", spdk_nvmf_subsystem_get_ana_reporting(subsystem));
     583             : 
     584             :         /*     } "params" */
     585           0 :         spdk_json_write_object_end(w);
     586             : 
     587             :         /* } */
     588           0 :         spdk_json_write_object_end(w);
     589             : 
     590           0 :         for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL;
     591           0 :              host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) {
     592             : 
     593           0 :                 spdk_json_write_object_begin(w);
     594           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host");
     595             : 
     596             :                 /*     "params" : { */
     597           0 :                 spdk_json_write_named_object_begin(w, "params");
     598             : 
     599           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     600           0 :                 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host));
     601           0 :                 if (host->dhchap_key != NULL) {
     602           0 :                         spdk_json_write_named_string(w, "dhchap_key",
     603             :                                                      spdk_key_get_name(host->dhchap_key));
     604             :                 }
     605           0 :                 if (host->dhchap_ctrlr_key != NULL) {
     606           0 :                         spdk_json_write_named_string(w, "dhchap_ctrlr_key",
     607             :                                                      spdk_key_get_name(host->dhchap_ctrlr_key));
     608             :                 }
     609           0 :                 TAILQ_FOREACH(transport, &subsystem->tgt->transports, link) {
     610           0 :                         if (transport->ops->subsystem_dump_host != NULL) {
     611           0 :                                 transport->ops->subsystem_dump_host(transport, subsystem, host->nqn, w);
     612             :                         }
     613             :                 }
     614             : 
     615             :                 /*     } "params" */
     616           0 :                 spdk_json_write_object_end(w);
     617             : 
     618             :                 /* } */
     619           0 :                 spdk_json_write_object_end(w);
     620             :         }
     621             : 
     622           0 :         for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL;
     623           0 :              ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) {
     624           0 :                 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts));
     625             : 
     626           0 :                 spdk_json_write_object_begin(w);
     627           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns");
     628             : 
     629             :                 /*     "params" : { */
     630           0 :                 spdk_json_write_named_object_begin(w, "params");
     631             : 
     632           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     633             : 
     634             :                 /*     "namespace" : { */
     635           0 :                 spdk_json_write_named_object_begin(w, "namespace");
     636             : 
     637           0 :                 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns));
     638           0 :                 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns)));
     639             : 
     640           0 :                 if (ns->ptpl_file != NULL) {
     641           0 :                         spdk_json_write_named_string(w, "ptpl_file", ns->ptpl_file);
     642             :                 }
     643             : 
     644           0 :                 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) {
     645             :                         SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch");
     646           0 :                         spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]),
     647             :                                                          from_be64(&ns_opts.nguid[8]));
     648             :                 }
     649             : 
     650           0 :                 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) {
     651             :                         SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch");
     652           0 :                         spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64));
     653             :                 }
     654             : 
     655           0 :                 if (!spdk_uuid_is_null(&ns_opts.uuid)) {
     656           0 :                         spdk_json_write_named_uuid(w, "uuid",  &ns_opts.uuid);
     657             :                 }
     658             : 
     659           0 :                 if (spdk_nvmf_subsystem_get_ana_reporting(subsystem)) {
     660           0 :                         spdk_json_write_named_uint32(w, "anagrpid", ns_opts.anagrpid);
     661             :                 }
     662             : 
     663           0 :                 spdk_json_write_named_bool(w, "no_auto_visible", !ns->always_visible);
     664             : 
     665             :                 /*     "namespace" */
     666           0 :                 spdk_json_write_object_end(w);
     667             : 
     668             :                 /*     } "params" */
     669           0 :                 spdk_json_write_object_end(w);
     670             : 
     671             :                 /* } */
     672           0 :                 spdk_json_write_object_end(w);
     673             : 
     674           0 :                 TAILQ_FOREACH(host, &ns->hosts, link) {
     675           0 :                         spdk_json_write_object_begin(w);
     676           0 :                         spdk_json_write_named_string(w, "method", "nvmf_ns_add_host");
     677           0 :                         spdk_json_write_named_object_begin(w, "params");
     678           0 :                         spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     679           0 :                         spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns));
     680           0 :                         spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host));
     681           0 :                         spdk_json_write_object_end(w);
     682           0 :                         spdk_json_write_object_end(w);
     683             :                 }
     684             :         }
     685           0 : }
     686             : 
     687             : static void
     688           0 : nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w,
     689             :                                  struct spdk_nvmf_subsystem *subsystem)
     690             : {
     691             :         struct spdk_nvmf_subsystem_listener *listener;
     692             :         struct spdk_nvmf_transport *transport;
     693             :         const struct spdk_nvme_transport_id *trid;
     694             : 
     695           0 :         if (spdk_nvmf_subsystem_get_type(subsystem) == SPDK_NVMF_SUBTYPE_NVME) {
     696           0 :                 nvmf_write_nvme_subsystem_config(w, subsystem);
     697             :         }
     698             : 
     699           0 :         for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL;
     700           0 :              listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) {
     701           0 :                 transport = listener->transport;
     702           0 :                 trid = spdk_nvmf_subsystem_listener_get_trid(listener);
     703             : 
     704           0 :                 spdk_json_write_object_begin(w);
     705           0 :                 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener");
     706             : 
     707             :                 /*     "params" : { */
     708           0 :                 spdk_json_write_named_object_begin(w, "params");
     709             : 
     710           0 :                 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem));
     711             : 
     712           0 :                 spdk_json_write_named_object_begin(w, "listen_address");
     713           0 :                 nvmf_transport_listen_dump_trid(trid, w);
     714           0 :                 spdk_json_write_object_end(w);
     715           0 :                 if (transport->ops->listen_dump_opts) {
     716           0 :                         transport->ops->listen_dump_opts(transport, trid, w);
     717             :                 }
     718             : 
     719           0 :                 spdk_json_write_named_bool(w, "secure_channel", listener->opts.secure_channel);
     720             : 
     721             :                 /*     } "params" */
     722           0 :                 spdk_json_write_object_end(w);
     723             : 
     724             :                 /* } */
     725           0 :                 spdk_json_write_object_end(w);
     726             :         }
     727           0 : }
     728             : 
     729             : void
     730           0 : spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt)
     731             : {
     732             :         struct spdk_nvmf_subsystem *subsystem;
     733             :         struct spdk_nvmf_transport *transport;
     734             :         struct spdk_nvmf_referral *referral;
     735             : 
     736           0 :         spdk_json_write_object_begin(w);
     737           0 :         spdk_json_write_named_string(w, "method", "nvmf_set_max_subsystems");
     738             : 
     739           0 :         spdk_json_write_named_object_begin(w, "params");
     740           0 :         spdk_json_write_named_uint32(w, "max_subsystems", tgt->max_subsystems);
     741           0 :         spdk_json_write_object_end(w);
     742             : 
     743           0 :         spdk_json_write_object_end(w);
     744             : 
     745           0 :         spdk_json_write_object_begin(w);
     746           0 :         spdk_json_write_named_string(w, "method", "nvmf_set_crdt");
     747           0 :         spdk_json_write_named_object_begin(w, "params");
     748           0 :         spdk_json_write_named_uint32(w, "crdt1", tgt->crdt[0]);
     749           0 :         spdk_json_write_named_uint32(w, "crdt2", tgt->crdt[1]);
     750           0 :         spdk_json_write_named_uint32(w, "crdt3", tgt->crdt[2]);
     751           0 :         spdk_json_write_object_end(w);
     752           0 :         spdk_json_write_object_end(w);
     753             : 
     754             :         /* write transports */
     755           0 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
     756           0 :                 spdk_json_write_object_begin(w);
     757           0 :                 spdk_json_write_named_string(w, "method", "nvmf_create_transport");
     758           0 :                 nvmf_transport_dump_opts(transport, w, true);
     759           0 :                 spdk_json_write_object_end(w);
     760             :         }
     761             : 
     762           0 :         TAILQ_FOREACH(referral, &tgt->referrals, link) {
     763           0 :                 spdk_json_write_object_begin(w);
     764           0 :                 spdk_json_write_named_string(w, "method", "nvmf_discovery_add_referral");
     765             : 
     766           0 :                 spdk_json_write_named_object_begin(w, "params");
     767           0 :                 spdk_json_write_named_object_begin(w, "address");
     768           0 :                 nvmf_transport_listen_dump_trid(&referral->trid, w);
     769           0 :                 spdk_json_write_object_end(w);
     770           0 :                 spdk_json_write_named_bool(w, "secure_channel",
     771           0 :                                            referral->entry.treq.secure_channel ==
     772             :                                            SPDK_NVMF_TREQ_SECURE_CHANNEL_REQUIRED);
     773           0 :                 spdk_json_write_named_string(w, "subnqn", referral->trid.subnqn);
     774           0 :                 spdk_json_write_object_end(w);
     775             : 
     776           0 :                 spdk_json_write_object_end(w);
     777             :         }
     778             : 
     779           0 :         subsystem = spdk_nvmf_subsystem_get_first(tgt);
     780           0 :         while (subsystem) {
     781           0 :                 nvmf_write_subsystem_config_json(w, subsystem);
     782           0 :                 subsystem = spdk_nvmf_subsystem_get_next(subsystem);
     783             :         }
     784           0 : }
     785             : 
     786             : static void
     787           0 : nvmf_listen_opts_copy(struct spdk_nvmf_listen_opts *opts,
     788             :                       const struct spdk_nvmf_listen_opts *opts_src, size_t opts_size)
     789             : {
     790           0 :         assert(opts);
     791           0 :         assert(opts_src);
     792             : 
     793           0 :         opts->opts_size = opts_size;
     794             : 
     795             : #define SET_FIELD(field) \
     796             :     if (offsetof(struct spdk_nvmf_listen_opts, field) + sizeof(opts->field) <= opts_size) { \
     797             :                  opts->field = opts_src->field; \
     798             :     } \
     799             : 
     800           0 :         SET_FIELD(transport_specific);
     801           0 :         SET_FIELD(secure_channel);
     802           0 :         SET_FIELD(ana_state);
     803             : #undef SET_FIELD
     804             : 
     805             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
     806             :          * and do not forget to add the SET_FIELD statement for your added field. */
     807             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_nvmf_listen_opts) == 24, "Incorrect size");
     808           0 : }
     809             : 
     810             : void
     811           0 : spdk_nvmf_listen_opts_init(struct spdk_nvmf_listen_opts *opts, size_t opts_size)
     812             : {
     813           0 :         struct spdk_nvmf_listen_opts opts_local = {};
     814             : 
     815             :         /* local version of opts should have defaults set here */
     816           0 :         opts_local.ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
     817           0 :         nvmf_listen_opts_copy(opts, &opts_local, opts_size);
     818           0 : }
     819             : 
     820             : int
     821           0 : spdk_nvmf_tgt_listen_ext(struct spdk_nvmf_tgt *tgt, const struct spdk_nvme_transport_id *trid,
     822             :                          struct spdk_nvmf_listen_opts *opts)
     823             : {
     824             :         struct spdk_nvmf_transport *transport;
     825             :         int rc;
     826           0 :         struct spdk_nvmf_listen_opts opts_local = {};
     827             : 
     828           0 :         if (!opts) {
     829           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
     830           0 :                 return -EINVAL;
     831             :         }
     832             : 
     833           0 :         if (!opts->opts_size) {
     834           0 :                 SPDK_ERRLOG("The opts_size in opts structure should not be zero\n");
     835           0 :                 return -EINVAL;
     836             :         }
     837             : 
     838           0 :         transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring);
     839           0 :         if (!transport) {
     840           0 :                 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n",
     841             :                             trid->trstring);
     842           0 :                 return -EINVAL;
     843             :         }
     844             : 
     845           0 :         nvmf_listen_opts_copy(&opts_local, opts, opts->opts_size);
     846           0 :         rc = spdk_nvmf_transport_listen(transport, trid, &opts_local);
     847           0 :         if (rc < 0) {
     848           0 :                 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr);
     849             :         }
     850             : 
     851           0 :         return rc;
     852             : }
     853             : 
     854             : int
     855           0 : spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt,
     856             :                           struct spdk_nvme_transport_id *trid)
     857             : {
     858             :         struct spdk_nvmf_transport *transport;
     859             :         int rc;
     860             : 
     861           0 :         transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring);
     862           0 :         if (!transport) {
     863           0 :                 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n",
     864             :                             trid->trstring);
     865           0 :                 return -EINVAL;
     866             :         }
     867             : 
     868           0 :         rc = spdk_nvmf_transport_stop_listen(transport, trid);
     869           0 :         if (rc < 0) {
     870           0 :                 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr);
     871           0 :                 return rc;
     872             :         }
     873           0 :         return 0;
     874             : }
     875             : 
     876             : struct spdk_nvmf_tgt_add_transport_ctx {
     877             :         struct spdk_nvmf_tgt *tgt;
     878             :         struct spdk_nvmf_transport *transport;
     879             :         spdk_nvmf_tgt_add_transport_done_fn cb_fn;
     880             :         void *cb_arg;
     881             :         int status;
     882             : };
     883             : 
     884             : static void
     885           0 : _nvmf_tgt_remove_transport_done(struct spdk_io_channel_iter *i, int status)
     886             : {
     887           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     888             : 
     889           0 :         ctx->cb_fn(ctx->cb_arg, ctx->status);
     890           0 :         free(ctx);
     891           0 : }
     892             : 
     893             : static void
     894           0 : _nvmf_tgt_remove_transport(struct spdk_io_channel_iter *i)
     895             : {
     896           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     897           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     898           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     899             :         struct spdk_nvmf_transport_poll_group *tgroup, *tmp;
     900             : 
     901           0 :         TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) {
     902           0 :                 if (tgroup->transport == ctx->transport) {
     903           0 :                         TAILQ_REMOVE(&group->tgroups, tgroup, link);
     904           0 :                         nvmf_transport_poll_group_destroy(tgroup);
     905             :                 }
     906             :         }
     907             : 
     908           0 :         spdk_for_each_channel_continue(i, 0);
     909           0 : }
     910             : 
     911             : static void
     912           0 : _nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status)
     913             : {
     914           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     915             : 
     916           0 :         if (status) {
     917           0 :                 ctx->status = status;
     918           0 :                 spdk_for_each_channel(ctx->tgt,
     919             :                                       _nvmf_tgt_remove_transport,
     920             :                                       ctx,
     921             :                                       _nvmf_tgt_remove_transport_done);
     922           0 :                 return;
     923             :         }
     924             : 
     925           0 :         ctx->transport->tgt = ctx->tgt;
     926           0 :         TAILQ_INSERT_TAIL(&ctx->tgt->transports, ctx->transport, link);
     927           0 :         ctx->cb_fn(ctx->cb_arg, status);
     928           0 :         free(ctx);
     929             : }
     930             : 
     931             : static void
     932           0 : _nvmf_tgt_add_transport(struct spdk_io_channel_iter *i)
     933             : {
     934           0 :         struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     935           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     936           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     937             :         int rc;
     938             : 
     939           0 :         rc = nvmf_poll_group_add_transport(group, ctx->transport);
     940           0 :         spdk_for_each_channel_continue(i, rc);
     941           0 : }
     942             : 
     943             : void
     944           0 : spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt,
     945             :                             struct spdk_nvmf_transport *transport,
     946             :                             spdk_nvmf_tgt_add_transport_done_fn cb_fn,
     947             :                             void *cb_arg)
     948             : {
     949             :         struct spdk_nvmf_tgt_add_transport_ctx *ctx;
     950             : 
     951             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_add_transport, transport, tgt->name);
     952             : 
     953           0 :         if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) {
     954           0 :                 cb_fn(cb_arg, -EEXIST);
     955           0 :                 return; /* transport already created */
     956             :         }
     957             : 
     958           0 :         ctx = calloc(1, sizeof(*ctx));
     959           0 :         if (!ctx) {
     960           0 :                 cb_fn(cb_arg, -ENOMEM);
     961           0 :                 return;
     962             :         }
     963             : 
     964           0 :         ctx->tgt = tgt;
     965           0 :         ctx->transport = transport;
     966           0 :         ctx->cb_fn = cb_fn;
     967           0 :         ctx->cb_arg = cb_arg;
     968             : 
     969           0 :         spdk_for_each_channel(tgt,
     970             :                               _nvmf_tgt_add_transport,
     971             :                               ctx,
     972             :                               _nvmf_tgt_add_transport_done);
     973             : }
     974             : 
     975             : struct nvmf_tgt_pause_ctx {
     976             :         struct spdk_nvmf_tgt *tgt;
     977             :         spdk_nvmf_tgt_pause_polling_cb_fn cb_fn;
     978             :         void *cb_arg;
     979             : };
     980             : 
     981             : static void
     982           0 : _nvmf_tgt_pause_polling_done(struct spdk_io_channel_iter *i, int status)
     983             : {
     984           0 :         struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
     985             : 
     986           0 :         ctx->tgt->state = NVMF_TGT_PAUSED;
     987             : 
     988           0 :         ctx->cb_fn(ctx->cb_arg, status);
     989           0 :         free(ctx);
     990           0 : }
     991             : 
     992             : static void
     993           0 : _nvmf_tgt_pause_polling(struct spdk_io_channel_iter *i)
     994             : {
     995           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     996           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
     997             : 
     998           0 :         spdk_poller_unregister(&group->poller);
     999             : 
    1000           0 :         spdk_for_each_channel_continue(i, 0);
    1001           0 : }
    1002             : 
    1003             : int
    1004           0 : spdk_nvmf_tgt_pause_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_pause_polling_cb_fn cb_fn,
    1005             :                             void *cb_arg)
    1006             : {
    1007             :         struct nvmf_tgt_pause_ctx *ctx;
    1008             : 
    1009             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_pause_polling, tgt, tgt->name);
    1010             : 
    1011           0 :         switch (tgt->state) {
    1012           0 :         case NVMF_TGT_PAUSING:
    1013             :         case NVMF_TGT_RESUMING:
    1014           0 :                 return -EBUSY;
    1015           0 :         case NVMF_TGT_RUNNING:
    1016           0 :                 break;
    1017           0 :         default:
    1018           0 :                 return -EINVAL;
    1019             :         }
    1020             : 
    1021           0 :         ctx = calloc(1, sizeof(*ctx));
    1022           0 :         if (!ctx) {
    1023           0 :                 return -ENOMEM;
    1024             :         }
    1025             : 
    1026             : 
    1027           0 :         tgt->state = NVMF_TGT_PAUSING;
    1028             : 
    1029           0 :         ctx->tgt = tgt;
    1030           0 :         ctx->cb_fn = cb_fn;
    1031           0 :         ctx->cb_arg = cb_arg;
    1032             : 
    1033           0 :         spdk_for_each_channel(tgt,
    1034             :                               _nvmf_tgt_pause_polling,
    1035             :                               ctx,
    1036             :                               _nvmf_tgt_pause_polling_done);
    1037           0 :         return 0;
    1038             : }
    1039             : 
    1040             : static void
    1041           0 : _nvmf_tgt_resume_polling_done(struct spdk_io_channel_iter *i, int status)
    1042             : {
    1043           0 :         struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    1044             : 
    1045           0 :         ctx->tgt->state = NVMF_TGT_RUNNING;
    1046             : 
    1047           0 :         ctx->cb_fn(ctx->cb_arg, status);
    1048           0 :         free(ctx);
    1049           0 : }
    1050             : 
    1051             : static void
    1052           0 : _nvmf_tgt_resume_polling(struct spdk_io_channel_iter *i)
    1053             : {
    1054           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
    1055           0 :         struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch);
    1056             : 
    1057           0 :         assert(group->poller == NULL);
    1058           0 :         group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0);
    1059             : 
    1060           0 :         spdk_for_each_channel_continue(i, 0);
    1061           0 : }
    1062             : 
    1063             : int
    1064           0 : spdk_nvmf_tgt_resume_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_resume_polling_cb_fn cb_fn,
    1065             :                              void *cb_arg)
    1066             : {
    1067             :         struct nvmf_tgt_pause_ctx *ctx;
    1068             : 
    1069             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_resume_polling, tgt, tgt->name);
    1070             : 
    1071           0 :         switch (tgt->state) {
    1072           0 :         case NVMF_TGT_PAUSING:
    1073             :         case NVMF_TGT_RESUMING:
    1074           0 :                 return -EBUSY;
    1075           0 :         case NVMF_TGT_PAUSED:
    1076           0 :                 break;
    1077           0 :         default:
    1078           0 :                 return -EINVAL;
    1079             :         }
    1080             : 
    1081           0 :         ctx = calloc(1, sizeof(*ctx));
    1082           0 :         if (!ctx) {
    1083           0 :                 return -ENOMEM;
    1084             :         }
    1085             : 
    1086           0 :         tgt->state = NVMF_TGT_RESUMING;
    1087             : 
    1088           0 :         ctx->tgt = tgt;
    1089           0 :         ctx->cb_fn = cb_fn;
    1090           0 :         ctx->cb_arg = cb_arg;
    1091             : 
    1092           0 :         spdk_for_each_channel(tgt,
    1093             :                               _nvmf_tgt_resume_polling,
    1094             :                               ctx,
    1095             :                               _nvmf_tgt_resume_polling_done);
    1096           0 :         return 0;
    1097             : }
    1098             : 
    1099             : struct spdk_nvmf_subsystem *
    1100           0 : spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn)
    1101             : {
    1102           0 :         struct spdk_nvmf_subsystem subsystem;
    1103             : 
    1104           0 :         if (!subnqn) {
    1105           0 :                 return NULL;
    1106             :         }
    1107             : 
    1108             :         /* Ensure that subnqn is null terminated */
    1109           0 :         if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) {
    1110           0 :                 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n");
    1111           0 :                 return NULL;
    1112             :         }
    1113             : 
    1114           0 :         snprintf(subsystem.subnqn, sizeof(subsystem.subnqn), "%s", subnqn);
    1115           0 :         return RB_FIND(subsystem_tree, &tgt->subsystems, &subsystem);
    1116             : }
    1117             : 
    1118             : struct spdk_nvmf_transport *
    1119           0 : spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name)
    1120             : {
    1121             :         struct spdk_nvmf_transport *transport;
    1122             : 
    1123           0 :         TAILQ_FOREACH(transport, &tgt->transports, link) {
    1124           0 :                 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) {
    1125           0 :                         return transport;
    1126             :                 }
    1127             :         }
    1128           0 :         return NULL;
    1129             : }
    1130             : 
    1131             : struct nvmf_new_qpair_ctx {
    1132             :         struct spdk_nvmf_qpair *qpair;
    1133             :         struct spdk_nvmf_poll_group *group;
    1134             : };
    1135             : 
    1136             : static void
    1137           0 : _nvmf_poll_group_add(void *_ctx)
    1138             : {
    1139           0 :         struct nvmf_new_qpair_ctx *ctx = _ctx;
    1140           0 :         struct spdk_nvmf_qpair *qpair = ctx->qpair;
    1141           0 :         struct spdk_nvmf_poll_group *group = ctx->group;
    1142             : 
    1143           0 :         free(_ctx);
    1144             : 
    1145           0 :         if (spdk_nvmf_poll_group_add(group, qpair) != 0) {
    1146           0 :                 SPDK_ERRLOG("Unable to add the qpair to a poll group.\n");
    1147           0 :                 spdk_nvmf_qpair_disconnect(qpair);
    1148             :         }
    1149           0 : }
    1150             : 
    1151             : void
    1152           0 : spdk_nvmf_tgt_new_qpair(struct spdk_nvmf_tgt *tgt, struct spdk_nvmf_qpair *qpair)
    1153             : {
    1154             :         struct spdk_nvmf_poll_group *group;
    1155             :         struct nvmf_new_qpair_ctx *ctx;
    1156             : 
    1157           0 :         group = spdk_nvmf_get_optimal_poll_group(qpair);
    1158           0 :         if (group == NULL) {
    1159           0 :                 if (tgt->next_poll_group == NULL) {
    1160           0 :                         tgt->next_poll_group = TAILQ_FIRST(&tgt->poll_groups);
    1161           0 :                         if (tgt->next_poll_group == NULL) {
    1162           0 :                                 SPDK_ERRLOG("No poll groups exist.\n");
    1163           0 :                                 spdk_nvmf_qpair_disconnect(qpair);
    1164           0 :                                 return;
    1165             :                         }
    1166             :                 }
    1167           0 :                 group = tgt->next_poll_group;
    1168           0 :                 tgt->next_poll_group = TAILQ_NEXT(group, link);
    1169             :         }
    1170             : 
    1171           0 :         ctx = calloc(1, sizeof(*ctx));
    1172           0 :         if (!ctx) {
    1173           0 :                 SPDK_ERRLOG("Unable to send message to poll group.\n");
    1174           0 :                 spdk_nvmf_qpair_disconnect(qpair);
    1175           0 :                 return;
    1176             :         }
    1177             : 
    1178           0 :         ctx->qpair = qpair;
    1179           0 :         ctx->group = group;
    1180             : 
    1181           0 :         pthread_mutex_lock(&group->mutex);
    1182           0 :         group->current_unassociated_qpairs++;
    1183           0 :         pthread_mutex_unlock(&group->mutex);
    1184             : 
    1185           0 :         spdk_thread_send_msg(group->thread, _nvmf_poll_group_add, ctx);
    1186             : }
    1187             : 
    1188             : struct spdk_nvmf_poll_group *
    1189           0 : spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt)
    1190             : {
    1191             :         struct spdk_io_channel *ch;
    1192             : 
    1193           0 :         ch = spdk_get_io_channel(tgt);
    1194           0 :         if (!ch) {
    1195           0 :                 SPDK_ERRLOG("Unable to get I/O channel for target\n");
    1196           0 :                 return NULL;
    1197             :         }
    1198             : 
    1199           0 :         return spdk_io_channel_get_ctx(ch);
    1200             : }
    1201             : 
    1202             : void
    1203           0 : spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group,
    1204             :                              spdk_nvmf_poll_group_destroy_done_fn cb_fn,
    1205             :                              void *cb_arg)
    1206             : {
    1207           0 :         assert(group->destroy_cb_fn == NULL);
    1208           0 :         group->destroy_cb_fn = cb_fn;
    1209           0 :         group->destroy_cb_arg = cb_arg;
    1210             : 
    1211             :         /* This function will put the io_channel associated with this poll group */
    1212           0 :         nvmf_tgt_destroy_poll_group_qpairs(group);
    1213           0 : }
    1214             : 
    1215             : int
    1216           0 : spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group,
    1217             :                          struct spdk_nvmf_qpair *qpair)
    1218             : {
    1219             :         int rc;
    1220             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1221             : 
    1222           0 :         TAILQ_INIT(&qpair->outstanding);
    1223           0 :         qpair->group = group;
    1224           0 :         qpair->ctrlr = NULL;
    1225           0 :         qpair->disconnect_started = false;
    1226             : 
    1227           0 :         tgroup = nvmf_get_transport_poll_group(group, qpair->transport);
    1228           0 :         if (tgroup == NULL) {
    1229           0 :                 return -1;
    1230             :         }
    1231             : 
    1232           0 :         rc = nvmf_transport_poll_group_add(tgroup, qpair);
    1233             : 
    1234             :         /* We add the qpair to the group only it is successfully added into the tgroup */
    1235           0 :         if (rc == 0) {
    1236             :                 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_qpair, qpair, spdk_thread_get_id(group->thread));
    1237           0 :                 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link);
    1238           0 :                 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_CONNECTING);
    1239             :         }
    1240             : 
    1241           0 :         return rc;
    1242             : }
    1243             : 
    1244             : static void
    1245           0 : _nvmf_ctrlr_destruct(void *ctx)
    1246             : {
    1247           0 :         struct spdk_nvmf_ctrlr *ctrlr = ctx;
    1248             : 
    1249           0 :         nvmf_ctrlr_destruct(ctrlr);
    1250           0 : }
    1251             : 
    1252             : static void
    1253           0 : _nvmf_ctrlr_free_from_qpair(void *ctx)
    1254             : {
    1255           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1256           0 :         struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr;
    1257             :         uint32_t count;
    1258             : 
    1259           0 :         spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid);
    1260           0 :         SPDK_DEBUGLOG(nvmf, "qpair_mask cleared, qid %u\n", qpair_ctx->qid);
    1261           0 :         count = spdk_bit_array_count_set(ctrlr->qpair_mask);
    1262           0 :         if (count == 0) {
    1263           0 :                 assert(!ctrlr->in_destruct);
    1264           0 :                 SPDK_DEBUGLOG(nvmf, "Last qpair %u, destroy ctrlr 0x%hx\n", qpair_ctx->qid, ctrlr->cntlid);
    1265           0 :                 ctrlr->in_destruct = true;
    1266           0 :                 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr);
    1267             :         }
    1268           0 :         free(qpair_ctx);
    1269           0 : }
    1270             : 
    1271             : static void
    1272           0 : _nvmf_transport_qpair_fini_complete(void *cb_ctx)
    1273             : {
    1274           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = cb_ctx;
    1275             :         struct spdk_nvmf_ctrlr *ctrlr;
    1276             : 
    1277           0 :         ctrlr = qpair_ctx->ctrlr;
    1278           0 :         SPDK_DEBUGLOG(nvmf, "Finish destroying qid %u\n", qpair_ctx->qid);
    1279             : 
    1280           0 :         if (ctrlr) {
    1281           0 :                 if (qpair_ctx->qid == 0) {
    1282             :                         /* Admin qpair is removed, so set the pointer to NULL.
    1283             :                          * This operation is safe since we are on ctrlr thread now, admin qpair's thread is the same
    1284             :                          * as controller's thread */
    1285           0 :                         assert(ctrlr->thread == spdk_get_thread());
    1286           0 :                         ctrlr->admin_qpair = NULL;
    1287             :                 }
    1288             :                 /* Free qpair id from controller's bit mask and destroy the controller if it is the last qpair */
    1289           0 :                 if (ctrlr->thread) {
    1290           0 :                         spdk_thread_send_msg(ctrlr->thread, _nvmf_ctrlr_free_from_qpair, qpair_ctx);
    1291             :                 } else {
    1292           0 :                         _nvmf_ctrlr_free_from_qpair(qpair_ctx);
    1293             :                 }
    1294             :         } else {
    1295           0 :                 free(qpair_ctx);
    1296             :         }
    1297           0 : }
    1298             : 
    1299             : void
    1300           0 : spdk_nvmf_poll_group_remove(struct spdk_nvmf_qpair *qpair)
    1301             : {
    1302             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1303             :         int rc;
    1304             : 
    1305             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_remove_qpair, qpair,
    1306             :                                  spdk_thread_get_id(qpair->group->thread));
    1307           0 :         nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR);
    1308             : 
    1309             :         /* Find the tgroup and remove the qpair from the tgroup */
    1310           0 :         tgroup = nvmf_get_transport_poll_group(qpair->group, qpair->transport);
    1311           0 :         if (tgroup != NULL) {
    1312           0 :                 rc = nvmf_transport_poll_group_remove(tgroup, qpair);
    1313           0 :                 if (rc && (rc != ENOTSUP)) {
    1314           0 :                         SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n",
    1315             :                                     qpair, tgroup);
    1316             :                 }
    1317             :         }
    1318             : 
    1319           0 :         TAILQ_REMOVE(&qpair->group->qpairs, qpair, link);
    1320           0 :         qpair->group = NULL;
    1321           0 : }
    1322             : 
    1323             : static void
    1324           0 : _nvmf_qpair_sgroup_req_clean(struct spdk_nvmf_subsystem_poll_group *sgroup,
    1325             :                              const struct spdk_nvmf_qpair *qpair)
    1326             : {
    1327             :         struct spdk_nvmf_request *req, *tmp;
    1328           0 :         TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1329           0 :                 if (req->qpair == qpair) {
    1330           0 :                         TAILQ_REMOVE(&sgroup->queued, req, link);
    1331           0 :                         if (nvmf_transport_req_free(req)) {
    1332           0 :                                 SPDK_ERRLOG("Transport request free error!\n");
    1333             :                         }
    1334             :                 }
    1335             :         }
    1336           0 : }
    1337             : 
    1338             : static void
    1339           0 : _nvmf_qpair_destroy(void *ctx, int status)
    1340             : {
    1341           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1342           0 :         struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair;
    1343           0 :         struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr;
    1344             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1345             :         uint32_t sid;
    1346             : 
    1347           0 :         assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING);
    1348           0 :         qpair_ctx->qid = qpair->qid;
    1349             : 
    1350           0 :         if (qpair->connect_received) {
    1351           0 :                 if (0 == qpair->qid) {
    1352           0 :                         assert(qpair->group->stat.current_admin_qpairs > 0);
    1353           0 :                         qpair->group->stat.current_admin_qpairs--;
    1354             :                 } else {
    1355           0 :                         assert(qpair->group->stat.current_io_qpairs > 0);
    1356           0 :                         qpair->group->stat.current_io_qpairs--;
    1357             :                 }
    1358             :         } else {
    1359           0 :                 pthread_mutex_lock(&qpair->group->mutex);
    1360           0 :                 qpair->group->current_unassociated_qpairs--;
    1361           0 :                 pthread_mutex_unlock(&qpair->group->mutex);
    1362             :         }
    1363             : 
    1364           0 :         if (ctrlr) {
    1365           0 :                 sgroup = &qpair->group->sgroups[ctrlr->subsys->id];
    1366           0 :                 _nvmf_qpair_sgroup_req_clean(sgroup, qpair);
    1367             :         } else {
    1368           0 :                 for (sid = 0; sid < qpair->group->num_sgroups; sid++) {
    1369           0 :                         sgroup = &qpair->group->sgroups[sid];
    1370           0 :                         assert(sgroup != NULL);
    1371           0 :                         _nvmf_qpair_sgroup_req_clean(sgroup, qpair);
    1372             :                 }
    1373             :         }
    1374             : 
    1375           0 :         nvmf_qpair_auth_destroy(qpair);
    1376           0 :         qpair_ctx->ctrlr = ctrlr;
    1377           0 :         spdk_nvmf_poll_group_remove(qpair);
    1378           0 :         nvmf_transport_qpair_fini(qpair, _nvmf_transport_qpair_fini_complete, qpair_ctx);
    1379           0 : }
    1380             : 
    1381             : static void
    1382           0 : _nvmf_qpair_disconnect_msg(void *ctx)
    1383             : {
    1384           0 :         struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx;
    1385             : 
    1386           0 :         spdk_nvmf_qpair_disconnect(qpair_ctx->qpair);
    1387           0 :         free(ctx);
    1388           0 : }
    1389             : 
    1390             : int
    1391           0 : spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair)
    1392             : {
    1393           0 :         struct spdk_nvmf_poll_group *group = qpair->group;
    1394             :         struct nvmf_qpair_disconnect_ctx *qpair_ctx;
    1395             : 
    1396           0 :         if (__atomic_test_and_set(&qpair->disconnect_started, __ATOMIC_RELAXED)) {
    1397           0 :                 return -EINPROGRESS;
    1398             :         }
    1399             : 
    1400             :         /* If we get a qpair in the uninitialized state, we can just destroy it immediately */
    1401           0 :         if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) {
    1402           0 :                 nvmf_transport_qpair_fini(qpair, NULL, NULL);
    1403           0 :                 return 0;
    1404             :         }
    1405             : 
    1406           0 :         assert(group != NULL);
    1407           0 :         if (spdk_get_thread() != group->thread) {
    1408             :                 /* clear the atomic so we can set it on the next call on the proper thread. */
    1409           0 :                 __atomic_clear(&qpair->disconnect_started, __ATOMIC_RELAXED);
    1410           0 :                 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx));
    1411           0 :                 if (!qpair_ctx) {
    1412           0 :                         SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n");
    1413           0 :                         return -ENOMEM;
    1414             :                 }
    1415           0 :                 qpair_ctx->qpair = qpair;
    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(spdk_nvmf_qpair_is_active(qpair));
    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             : 
    1432             :         /* Check for outstanding I/O */
    1433           0 :         if (!TAILQ_EMPTY(&qpair->outstanding)) {
    1434             :                 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_drain_qpair, qpair, spdk_thread_get_id(group->thread));
    1435           0 :                 qpair->state_cb = _nvmf_qpair_destroy;
    1436           0 :                 qpair->state_cb_arg = qpair_ctx;
    1437           0 :                 nvmf_qpair_abort_pending_zcopy_reqs(qpair);
    1438           0 :                 nvmf_qpair_free_aer(qpair);
    1439           0 :                 return 0;
    1440             :         }
    1441             : 
    1442           0 :         _nvmf_qpair_destroy(qpair_ctx, 0);
    1443             : 
    1444           0 :         return 0;
    1445             : }
    1446             : 
    1447             : int
    1448           0 : spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
    1449             :                               struct spdk_nvme_transport_id *trid)
    1450             : {
    1451           0 :         memset(trid, 0, sizeof(*trid));
    1452           0 :         return nvmf_transport_qpair_get_peer_trid(qpair, trid);
    1453             : }
    1454             : 
    1455             : int
    1456           0 : spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
    1457             :                                struct spdk_nvme_transport_id *trid)
    1458             : {
    1459           0 :         memset(trid, 0, sizeof(*trid));
    1460           0 :         return nvmf_transport_qpair_get_local_trid(qpair, trid);
    1461             : }
    1462             : 
    1463             : int
    1464           0 : spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
    1465             :                                 struct spdk_nvme_transport_id *trid)
    1466             : {
    1467           0 :         memset(trid, 0, sizeof(*trid));
    1468           0 :         return nvmf_transport_qpair_get_listen_trid(qpair, trid);
    1469             : }
    1470             : 
    1471             : static int
    1472           1 : poll_group_update_subsystem(struct spdk_nvmf_poll_group *group,
    1473             :                             struct spdk_nvmf_subsystem *subsystem)
    1474             : {
    1475             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1476             :         uint32_t i, j;
    1477             :         struct spdk_nvmf_ns *ns;
    1478             :         struct spdk_nvmf_registrant *reg, *tmp;
    1479             :         struct spdk_io_channel *ch;
    1480             :         struct spdk_nvmf_subsystem_pg_ns_info *ns_info;
    1481             :         struct spdk_nvmf_ctrlr *ctrlr;
    1482             :         bool ns_changed;
    1483             : 
    1484             :         /* Make sure our poll group has memory for this subsystem allocated */
    1485           1 :         if (subsystem->id >= group->num_sgroups) {
    1486           0 :                 return -ENOMEM;
    1487             :         }
    1488             : 
    1489           1 :         sgroup = &group->sgroups[subsystem->id];
    1490             : 
    1491             :         /* Make sure the array of namespace information is the correct size */
    1492           1 :         if (sgroup->num_ns == 0 && subsystem->max_nsid > 0) {
    1493             :                 /* First allocation */
    1494           1 :                 sgroup->ns_info = calloc(subsystem->max_nsid, sizeof(struct spdk_nvmf_subsystem_pg_ns_info));
    1495           1 :                 if (!sgroup->ns_info) {
    1496           0 :                         return -ENOMEM;
    1497             :                 }
    1498           1 :                 sgroup->num_ns = subsystem->max_nsid;
    1499             :         }
    1500             : 
    1501           1 :         ns_changed = false;
    1502             : 
    1503             :         /* Detect bdevs that were added or removed */
    1504           2 :         for (i = 0; i < sgroup->num_ns; i++) {
    1505           1 :                 ns = subsystem->ns[i];
    1506           1 :                 ns_info = &sgroup->ns_info[i];
    1507           1 :                 ch = ns_info->channel;
    1508             : 
    1509           1 :                 if (ns == NULL && ch == NULL) {
    1510             :                         /* Both NULL. Leave empty */
    1511           1 :                 } else if (ns == NULL && ch != NULL) {
    1512             :                         /* There was a channel here, but the namespace is gone. */
    1513           0 :                         ns_changed = true;
    1514           0 :                         spdk_put_io_channel(ch);
    1515           0 :                         ns_info->channel = NULL;
    1516           1 :                 } else if (ns != NULL && ch == NULL) {
    1517             :                         /* A namespace appeared but there is no channel yet */
    1518           1 :                         ns_changed = true;
    1519           1 :                         ch = spdk_bdev_get_io_channel(ns->desc);
    1520           1 :                         if (ch == NULL) {
    1521           0 :                                 SPDK_ERRLOG("Could not allocate I/O channel.\n");
    1522           0 :                                 return -ENOMEM;
    1523             :                         }
    1524           1 :                         ns_info->channel = ch;
    1525           0 :                 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) {
    1526             :                         /* A namespace was here before, but was replaced by a new one. */
    1527           0 :                         ns_changed = true;
    1528           0 :                         spdk_put_io_channel(ns_info->channel);
    1529           0 :                         memset(ns_info, 0, sizeof(*ns_info));
    1530             : 
    1531           0 :                         ch = spdk_bdev_get_io_channel(ns->desc);
    1532           0 :                         if (ch == NULL) {
    1533           0 :                                 SPDK_ERRLOG("Could not allocate I/O channel.\n");
    1534           0 :                                 return -ENOMEM;
    1535             :                         }
    1536           0 :                         ns_info->channel = ch;
    1537           0 :                 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) {
    1538             :                         /* Namespace is still there but size has changed */
    1539           0 :                         SPDK_DEBUGLOG(nvmf, "Namespace resized: subsystem_id %u,"
    1540             :                                       " nsid %u, pg %p, old %" PRIu64 ", new %" PRIu64 "\n",
    1541             :                                       subsystem->id,
    1542             :                                       ns->nsid,
    1543             :                                       group,
    1544             :                                       ns_info->num_blocks,
    1545             :                                       spdk_bdev_get_num_blocks(ns->bdev));
    1546           0 :                         ns_changed = true;
    1547             :                 }
    1548             : 
    1549           1 :                 if (ns == NULL) {
    1550           0 :                         memset(ns_info, 0, sizeof(*ns_info));
    1551             :                 } else {
    1552           1 :                         ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev);
    1553           1 :                         ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev);
    1554           1 :                         ns_info->crkey = ns->crkey;
    1555           1 :                         ns_info->rtype = ns->rtype;
    1556           1 :                         if (ns->holder) {
    1557           0 :                                 ns_info->holder_id = ns->holder->hostid;
    1558             :                         }
    1559             : 
    1560           1 :                         memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid));
    1561           1 :                         j = 0;
    1562           1 :                         TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) {
    1563           0 :                                 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) {
    1564           0 :                                         SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS);
    1565           0 :                                         return -EINVAL;
    1566             :                                 }
    1567           0 :                                 ns_info->reg_hostid[j++] = reg->hostid;
    1568             :                         }
    1569             :                 }
    1570             :         }
    1571             : 
    1572           1 :         if (ns_changed) {
    1573           1 :                 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) {
    1574           0 :                         if (ctrlr->thread != spdk_get_thread()) {
    1575           0 :                                 continue;
    1576             :                         }
    1577             :                         /* It is possible that a ctrlr was added but the admin_qpair hasn't been
    1578             :                          * assigned yet.
    1579             :                          */
    1580           0 :                         if (!ctrlr->admin_qpair) {
    1581           0 :                                 continue;
    1582             :                         }
    1583           0 :                         if (ctrlr->admin_qpair->group == group) {
    1584           0 :                                 nvmf_ctrlr_async_event_ns_notice(ctrlr);
    1585           0 :                                 nvmf_ctrlr_async_event_ana_change_notice(ctrlr);
    1586             :                         }
    1587             :                 }
    1588             :         }
    1589             : 
    1590           1 :         return 0;
    1591             : }
    1592             : 
    1593             : int
    1594           0 : nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group,
    1595             :                                  struct spdk_nvmf_subsystem *subsystem)
    1596             : {
    1597           0 :         return poll_group_update_subsystem(group, subsystem);
    1598             : }
    1599             : 
    1600             : int
    1601           1 : nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group,
    1602             :                               struct spdk_nvmf_subsystem *subsystem,
    1603             :                               spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1604             : {
    1605           1 :         int rc = 0;
    1606           1 :         struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id];
    1607             :         struct spdk_nvmf_request *req, *tmp;
    1608             :         uint32_t i;
    1609             : 
    1610           1 :         if (!TAILQ_EMPTY(&sgroup->queued)) {
    1611           0 :                 SPDK_ERRLOG("sgroup->queued not empty when adding subsystem\n");
    1612           0 :                 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1613           0 :                         TAILQ_REMOVE(&sgroup->queued, req, link);
    1614           0 :                         if (nvmf_transport_req_free(req)) {
    1615           0 :                                 SPDK_ERRLOG("Transport request free error!\n");
    1616             :                         }
    1617             :                 }
    1618           0 :                 assert(false);
    1619             :         }
    1620             : 
    1621           1 :         rc = poll_group_update_subsystem(group, subsystem);
    1622           1 :         if (rc) {
    1623           0 :                 nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL);
    1624           0 :                 goto fini;
    1625             :         }
    1626             : 
    1627           1 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1628             : 
    1629           2 :         for (i = 0; i < sgroup->num_ns; i++) {
    1630           1 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1631             :         }
    1632             : 
    1633           1 : fini:
    1634           1 :         if (cb_fn) {
    1635           0 :                 cb_fn(cb_arg, rc);
    1636             :         }
    1637             : 
    1638             :         SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_subsystem, spdk_thread_get_id(group->thread),
    1639             :                                  subsystem->subnqn);
    1640             : 
    1641           1 :         return rc;
    1642             : }
    1643             : 
    1644             : static void
    1645           0 : _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status)
    1646             : {
    1647           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
    1648             :         struct spdk_nvmf_subsystem *subsystem;
    1649             :         struct spdk_nvmf_poll_group *group;
    1650             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1651           0 :         spdk_nvmf_poll_group_mod_done cpl_fn = NULL;
    1652           0 :         void *cpl_ctx = NULL;
    1653             :         uint32_t nsid;
    1654             : 
    1655           0 :         group = qpair_ctx->group;
    1656           0 :         subsystem = qpair_ctx->subsystem;
    1657           0 :         cpl_fn = qpair_ctx->cpl_fn;
    1658           0 :         cpl_ctx = qpair_ctx->cpl_ctx;
    1659           0 :         sgroup = &group->sgroups[subsystem->id];
    1660             : 
    1661           0 :         if (status) {
    1662           0 :                 goto fini;
    1663             :         }
    1664             : 
    1665           0 :         for (nsid = 0; nsid < sgroup->num_ns; nsid++) {
    1666           0 :                 if (sgroup->ns_info[nsid].channel) {
    1667           0 :                         spdk_put_io_channel(sgroup->ns_info[nsid].channel);
    1668           0 :                         sgroup->ns_info[nsid].channel = NULL;
    1669             :                 }
    1670             :         }
    1671             : 
    1672           0 :         sgroup->num_ns = 0;
    1673           0 :         free(sgroup->ns_info);
    1674           0 :         sgroup->ns_info = NULL;
    1675           0 : fini:
    1676           0 :         free(qpair_ctx);
    1677           0 :         if (cpl_fn) {
    1678           0 :                 cpl_fn(cpl_ctx, status);
    1679             :         }
    1680           0 : }
    1681             : 
    1682             : static void nvmf_poll_group_remove_subsystem_msg(void *ctx);
    1683             : 
    1684             : static void
    1685           0 : nvmf_poll_group_remove_subsystem_msg(void *ctx)
    1686             : {
    1687             :         struct spdk_nvmf_qpair *qpair, *qpair_tmp;
    1688             :         struct spdk_nvmf_subsystem *subsystem;
    1689             :         struct spdk_nvmf_poll_group *group;
    1690           0 :         struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx;
    1691           0 :         bool qpairs_found = false;
    1692           0 :         int rc = 0;
    1693             : 
    1694           0 :         group = qpair_ctx->group;
    1695           0 :         subsystem = qpair_ctx->subsystem;
    1696             : 
    1697           0 :         TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) {
    1698           0 :                 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) {
    1699           0 :                         qpairs_found = true;
    1700           0 :                         rc = spdk_nvmf_qpair_disconnect(qpair);
    1701           0 :                         if (rc && rc != -EINPROGRESS) {
    1702           0 :                                 break;
    1703             :                         }
    1704             :                 }
    1705             :         }
    1706             : 
    1707           0 :         if (!qpairs_found) {
    1708           0 :                 _nvmf_poll_group_remove_subsystem_cb(ctx, 0);
    1709           0 :                 return;
    1710             :         }
    1711             : 
    1712             :         /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */
    1713           0 :         spdk_thread_send_msg(spdk_get_thread(), nvmf_poll_group_remove_subsystem_msg, ctx);
    1714             : }
    1715             : 
    1716             : void
    1717           0 : nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group,
    1718             :                                  struct spdk_nvmf_subsystem *subsystem,
    1719             :                                  spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1720             : {
    1721             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1722             :         struct nvmf_qpair_disconnect_many_ctx *ctx;
    1723             :         uint32_t i;
    1724             : 
    1725             :         SPDK_DTRACE_PROBE3_TICKS(nvmf_poll_group_remove_subsystem, group, spdk_thread_get_id(group->thread),
    1726             :                                  subsystem->subnqn);
    1727             : 
    1728           0 :         ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx));
    1729           0 :         if (!ctx) {
    1730           0 :                 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n");
    1731           0 :                 if (cb_fn) {
    1732           0 :                         cb_fn(cb_arg, -1);
    1733             :                 }
    1734           0 :                 return;
    1735             :         }
    1736             : 
    1737           0 :         ctx->group = group;
    1738           0 :         ctx->subsystem = subsystem;
    1739           0 :         ctx->cpl_fn = cb_fn;
    1740           0 :         ctx->cpl_ctx = cb_arg;
    1741             : 
    1742           0 :         sgroup = &group->sgroups[subsystem->id];
    1743           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE;
    1744             : 
    1745           0 :         for (i = 0; i < sgroup->num_ns; i++) {
    1746           0 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_INACTIVE;
    1747             :         }
    1748             : 
    1749           0 :         nvmf_poll_group_remove_subsystem_msg(ctx);
    1750             : }
    1751             : 
    1752             : void
    1753           0 : nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group,
    1754             :                                 struct spdk_nvmf_subsystem *subsystem,
    1755             :                                 uint32_t nsid,
    1756             :                                 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1757             : {
    1758             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1759           0 :         struct spdk_nvmf_subsystem_pg_ns_info *ns_info = NULL;
    1760           0 :         int rc = 0;
    1761             :         uint32_t i;
    1762             : 
    1763           0 :         if (subsystem->id >= group->num_sgroups) {
    1764           0 :                 rc = -1;
    1765           0 :                 goto fini;
    1766             :         }
    1767             : 
    1768           0 :         sgroup = &group->sgroups[subsystem->id];
    1769           0 :         if (sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED) {
    1770           0 :                 goto fini;
    1771             :         }
    1772           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1773             : 
    1774           0 :         if (nsid == SPDK_NVME_GLOBAL_NS_TAG) {
    1775           0 :                 for (i = 0; i < sgroup->num_ns; i++) {
    1776           0 :                         ns_info = &sgroup->ns_info[i];
    1777           0 :                         ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1778             :                 }
    1779             :         } else {
    1780             :                 /* NOTE: This implicitly also checks for 0, since 0 - 1 wraps around to UINT32_MAX. */
    1781           0 :                 if (nsid - 1 < sgroup->num_ns) {
    1782           0 :                         ns_info  = &sgroup->ns_info[nsid - 1];
    1783           0 :                         ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING;
    1784             :                 }
    1785             :         }
    1786             : 
    1787           0 :         if (sgroup->mgmt_io_outstanding > 0) {
    1788           0 :                 assert(sgroup->cb_fn == NULL);
    1789           0 :                 sgroup->cb_fn = cb_fn;
    1790           0 :                 assert(sgroup->cb_arg == NULL);
    1791           0 :                 sgroup->cb_arg = cb_arg;
    1792           0 :                 return;
    1793             :         }
    1794             : 
    1795           0 :         if (nsid == SPDK_NVME_GLOBAL_NS_TAG) {
    1796           0 :                 for (i = 0; i < sgroup->num_ns; i++) {
    1797           0 :                         ns_info = &sgroup->ns_info[i];
    1798             : 
    1799           0 :                         if (ns_info->io_outstanding > 0) {
    1800           0 :                                 assert(sgroup->cb_fn == NULL);
    1801           0 :                                 sgroup->cb_fn = cb_fn;
    1802           0 :                                 assert(sgroup->cb_arg == NULL);
    1803           0 :                                 sgroup->cb_arg = cb_arg;
    1804           0 :                                 return;
    1805             :                         }
    1806             :                 }
    1807             :         } else {
    1808           0 :                 if (ns_info != NULL && ns_info->io_outstanding > 0) {
    1809           0 :                         assert(sgroup->cb_fn == NULL);
    1810           0 :                         sgroup->cb_fn = cb_fn;
    1811           0 :                         assert(sgroup->cb_arg == NULL);
    1812           0 :                         sgroup->cb_arg = cb_arg;
    1813           0 :                         return;
    1814             :                 }
    1815             :         }
    1816             : 
    1817           0 :         assert(sgroup->mgmt_io_outstanding == 0);
    1818           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED;
    1819           0 : fini:
    1820           0 :         if (cb_fn) {
    1821           0 :                 cb_fn(cb_arg, rc);
    1822             :         }
    1823             : }
    1824             : 
    1825             : void
    1826           0 : nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group,
    1827             :                                  struct spdk_nvmf_subsystem *subsystem,
    1828             :                                  spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg)
    1829             : {
    1830             :         struct spdk_nvmf_request *req, *tmp;
    1831             :         struct spdk_nvmf_subsystem_poll_group *sgroup;
    1832           0 :         int rc = 0;
    1833             :         uint32_t i;
    1834             : 
    1835           0 :         if (subsystem->id >= group->num_sgroups) {
    1836           0 :                 rc = -1;
    1837           0 :                 goto fini;
    1838             :         }
    1839             : 
    1840           0 :         sgroup = &group->sgroups[subsystem->id];
    1841             : 
    1842           0 :         if (sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE) {
    1843           0 :                 goto fini;
    1844             :         }
    1845             : 
    1846           0 :         rc = poll_group_update_subsystem(group, subsystem);
    1847           0 :         if (rc) {
    1848           0 :                 goto fini;
    1849             :         }
    1850             : 
    1851           0 :         for (i = 0; i < sgroup->num_ns; i++) {
    1852           0 :                 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1853             :         }
    1854             : 
    1855           0 :         sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE;
    1856             : 
    1857             :         /* Release all queued requests */
    1858           0 :         TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) {
    1859           0 :                 TAILQ_REMOVE(&sgroup->queued, req, link);
    1860           0 :                 if (spdk_nvmf_request_using_zcopy(req)) {
    1861           0 :                         spdk_nvmf_request_zcopy_start(req);
    1862             :                 } else {
    1863           0 :                         spdk_nvmf_request_exec(req);
    1864             :                 }
    1865             : 
    1866             :         }
    1867           0 : fini:
    1868           0 :         if (cb_fn) {
    1869           0 :                 cb_fn(cb_arg, rc);
    1870             :         }
    1871           0 : }
    1872             : 
    1873             : 
    1874             : struct spdk_nvmf_poll_group *
    1875           0 : spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair)
    1876             : {
    1877             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1878             : 
    1879           0 :         tgroup = nvmf_transport_get_optimal_poll_group(qpair->transport, qpair);
    1880             : 
    1881           0 :         if (tgroup == NULL) {
    1882           0 :                 return NULL;
    1883             :         }
    1884             : 
    1885           0 :         return tgroup->group;
    1886             : }
    1887             : 
    1888             : void
    1889           0 : spdk_nvmf_poll_group_dump_stat(struct spdk_nvmf_poll_group *group, struct spdk_json_write_ctx *w)
    1890             : {
    1891             :         struct spdk_nvmf_transport_poll_group *tgroup;
    1892             : 
    1893           0 :         spdk_json_write_object_begin(w);
    1894             : 
    1895           0 :         spdk_json_write_named_string(w, "name", spdk_thread_get_name(spdk_get_thread()));
    1896           0 :         spdk_json_write_named_uint32(w, "admin_qpairs", group->stat.admin_qpairs);
    1897           0 :         spdk_json_write_named_uint32(w, "io_qpairs", group->stat.io_qpairs);
    1898           0 :         spdk_json_write_named_uint32(w, "current_admin_qpairs", group->stat.current_admin_qpairs);
    1899           0 :         spdk_json_write_named_uint32(w, "current_io_qpairs", group->stat.current_io_qpairs);
    1900           0 :         spdk_json_write_named_uint64(w, "pending_bdev_io", group->stat.pending_bdev_io);
    1901           0 :         spdk_json_write_named_uint64(w, "completed_nvme_io", group->stat.completed_nvme_io);
    1902             : 
    1903           0 :         spdk_json_write_named_array_begin(w, "transports");
    1904             : 
    1905           0 :         TAILQ_FOREACH(tgroup, &group->tgroups, link) {
    1906           0 :                 spdk_json_write_object_begin(w);
    1907             :                 /*
    1908             :                  * The trtype field intentionally contains a transport name as this is more informative.
    1909             :                  * The field has not been renamed for backward compatibility.
    1910             :                  */
    1911           0 :                 spdk_json_write_named_string(w, "trtype", spdk_nvmf_get_transport_name(tgroup->transport));
    1912             : 
    1913           0 :                 if (tgroup->transport->ops->poll_group_dump_stat) {
    1914           0 :                         tgroup->transport->ops->poll_group_dump_stat(tgroup, w);
    1915             :                 }
    1916             : 
    1917           0 :                 spdk_json_write_object_end(w);
    1918             :         }
    1919             : 
    1920           0 :         spdk_json_write_array_end(w);
    1921           0 :         spdk_json_write_object_end(w);
    1922           0 : }

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