LCOV - code coverage report
Current view: top level - module/bdev/nvme - bdev_nvme.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 2243 4205 53.3 %
Date: 2024-07-11 13:15:21 Functions: 213 306 69.6 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2021-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  *   Copyright (c) 2022 Dell Inc, or its subsidiaries. All rights reserved.
       6             :  */
       7             : 
       8             : #include "spdk/stdinc.h"
       9             : 
      10             : #include "bdev_nvme.h"
      11             : 
      12             : #include "spdk/accel.h"
      13             : #include "spdk/config.h"
      14             : #include "spdk/endian.h"
      15             : #include "spdk/bdev.h"
      16             : #include "spdk/json.h"
      17             : #include "spdk/keyring.h"
      18             : #include "spdk/likely.h"
      19             : #include "spdk/nvme.h"
      20             : #include "spdk/nvme_ocssd.h"
      21             : #include "spdk/nvme_zns.h"
      22             : #include "spdk/opal.h"
      23             : #include "spdk/thread.h"
      24             : #include "spdk/trace.h"
      25             : #include "spdk/string.h"
      26             : #include "spdk/util.h"
      27             : #include "spdk/uuid.h"
      28             : 
      29             : #include "spdk/bdev_module.h"
      30             : #include "spdk/log.h"
      31             : 
      32             : #include "spdk_internal/usdt.h"
      33             : #include "spdk_internal/trace_defs.h"
      34             : 
      35             : #define SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT true
      36             : #define SPDK_BDEV_NVME_DEFAULT_KEEP_ALIVE_TIMEOUT_IN_MS (10000)
      37             : 
      38             : #define NSID_STR_LEN 10
      39             : 
      40             : #define SPDK_CONTROLLER_NAME_MAX 512
      41             : 
      42             : static int bdev_nvme_config_json(struct spdk_json_write_ctx *w);
      43             : 
      44             : struct nvme_bdev_io {
      45             :         /** array of iovecs to transfer. */
      46             :         struct iovec *iovs;
      47             : 
      48             :         /** Number of iovecs in iovs array. */
      49             :         int iovcnt;
      50             : 
      51             :         /** Current iovec position. */
      52             :         int iovpos;
      53             : 
      54             :         /** Offset in current iovec. */
      55             :         uint32_t iov_offset;
      56             : 
      57             :         /** I/O path the current I/O or admin passthrough is submitted on, or the I/O path
      58             :          *  being reset in a reset I/O.
      59             :          */
      60             :         struct nvme_io_path *io_path;
      61             : 
      62             :         /** array of iovecs to transfer. */
      63             :         struct iovec *fused_iovs;
      64             : 
      65             :         /** Number of iovecs in iovs array. */
      66             :         int fused_iovcnt;
      67             : 
      68             :         /** Current iovec position. */
      69             :         int fused_iovpos;
      70             : 
      71             :         /** Offset in current iovec. */
      72             :         uint32_t fused_iov_offset;
      73             : 
      74             :         /** Saved status for admin passthru completion event, PI error verification, or intermediate compare-and-write status */
      75             :         struct spdk_nvme_cpl cpl;
      76             : 
      77             :         /** Extended IO opts passed by the user to bdev layer and mapped to NVME format */
      78             :         struct spdk_nvme_ns_cmd_ext_io_opts ext_opts;
      79             : 
      80             :         /** Keeps track if first of fused commands was submitted */
      81             :         bool first_fused_submitted;
      82             : 
      83             :         /** Keeps track if first of fused commands was completed */
      84             :         bool first_fused_completed;
      85             : 
      86             :         /** Temporary pointer to zone report buffer */
      87             :         struct spdk_nvme_zns_zone_report *zone_report_buf;
      88             : 
      89             :         /** Keep track of how many zones that have been copied to the spdk_bdev_zone_info struct */
      90             :         uint64_t handled_zones;
      91             : 
      92             :         /** Expiration value in ticks to retry the current I/O. */
      93             :         uint64_t retry_ticks;
      94             : 
      95             :         /* How many times the current I/O was retried. */
      96             :         int32_t retry_count;
      97             : 
      98             :         /* Current tsc at submit time. */
      99             :         uint64_t submit_tsc;
     100             : };
     101             : 
     102             : struct nvme_probe_skip_entry {
     103             :         struct spdk_nvme_transport_id           trid;
     104             :         TAILQ_ENTRY(nvme_probe_skip_entry)      tailq;
     105             : };
     106             : /* All the controllers deleted by users via RPC are skipped by hotplug monitor */
     107             : static TAILQ_HEAD(, nvme_probe_skip_entry) g_skipped_nvme_ctrlrs = TAILQ_HEAD_INITIALIZER(
     108             :                         g_skipped_nvme_ctrlrs);
     109             : 
     110             : #define BDEV_NVME_DEFAULT_DIGESTS (SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA256) | \
     111             :                                    SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA384) | \
     112             :                                    SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA512))
     113             : 
     114             : #define BDEV_NVME_DEFAULT_DHGROUPS (SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_NULL) | \
     115             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_2048) | \
     116             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_3072) | \
     117             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_4096) | \
     118             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_6144) | \
     119             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_8192))
     120             : 
     121             : static struct spdk_bdev_nvme_opts g_opts = {
     122             :         .action_on_timeout = SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE,
     123             :         .timeout_us = 0,
     124             :         .timeout_admin_us = 0,
     125             :         .keep_alive_timeout_ms = SPDK_BDEV_NVME_DEFAULT_KEEP_ALIVE_TIMEOUT_IN_MS,
     126             :         .transport_retry_count = 4,
     127             :         .arbitration_burst = 0,
     128             :         .low_priority_weight = 0,
     129             :         .medium_priority_weight = 0,
     130             :         .high_priority_weight = 0,
     131             :         .nvme_adminq_poll_period_us = 10000ULL,
     132             :         .nvme_ioq_poll_period_us = 0,
     133             :         .io_queue_requests = 0,
     134             :         .delay_cmd_submit = SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT,
     135             :         .bdev_retry_count = 3,
     136             :         .transport_ack_timeout = 0,
     137             :         .ctrlr_loss_timeout_sec = 0,
     138             :         .reconnect_delay_sec = 0,
     139             :         .fast_io_fail_timeout_sec = 0,
     140             :         .disable_auto_failback = false,
     141             :         .generate_uuids = false,
     142             :         .transport_tos = 0,
     143             :         .nvme_error_stat = false,
     144             :         .io_path_stat = false,
     145             :         .allow_accel_sequence = false,
     146             :         .dhchap_digests = BDEV_NVME_DEFAULT_DIGESTS,
     147             :         .dhchap_dhgroups = BDEV_NVME_DEFAULT_DHGROUPS,
     148             : };
     149             : 
     150             : #define NVME_HOTPLUG_POLL_PERIOD_MAX                    10000000ULL
     151             : #define NVME_HOTPLUG_POLL_PERIOD_DEFAULT                100000ULL
     152             : 
     153             : static int g_hot_insert_nvme_controller_index = 0;
     154             : static uint64_t g_nvme_hotplug_poll_period_us = NVME_HOTPLUG_POLL_PERIOD_DEFAULT;
     155             : static bool g_nvme_hotplug_enabled = false;
     156             : struct spdk_thread *g_bdev_nvme_init_thread;
     157             : static struct spdk_poller *g_hotplug_poller;
     158             : static struct spdk_poller *g_hotplug_probe_poller;
     159             : static struct spdk_nvme_probe_ctx *g_hotplug_probe_ctx;
     160             : 
     161             : static void nvme_ctrlr_populate_namespaces(struct nvme_ctrlr *nvme_ctrlr,
     162             :                 struct nvme_async_probe_ctx *ctx);
     163             : static void nvme_ctrlr_populate_namespaces_done(struct nvme_ctrlr *nvme_ctrlr,
     164             :                 struct nvme_async_probe_ctx *ctx);
     165             : static int bdev_nvme_library_init(void);
     166             : static void bdev_nvme_library_fini(void);
     167             : static void _bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch,
     168             :                                       struct spdk_bdev_io *bdev_io);
     169             : static void bdev_nvme_submit_request(struct spdk_io_channel *ch,
     170             :                                      struct spdk_bdev_io *bdev_io);
     171             : static int bdev_nvme_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     172             :                            void *md, uint64_t lba_count, uint64_t lba,
     173             :                            uint32_t flags, struct spdk_memory_domain *domain, void *domain_ctx,
     174             :                            struct spdk_accel_sequence *seq);
     175             : static int bdev_nvme_no_pi_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     176             :                                  void *md, uint64_t lba_count, uint64_t lba);
     177             : static int bdev_nvme_writev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     178             :                             void *md, uint64_t lba_count, uint64_t lba,
     179             :                             uint32_t flags, struct spdk_memory_domain *domain, void *domain_ctx,
     180             :                             struct spdk_accel_sequence *seq,
     181             :                             union spdk_bdev_nvme_cdw12 cdw12, union spdk_bdev_nvme_cdw13 cdw13);
     182             : static int bdev_nvme_zone_appendv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     183             :                                   void *md, uint64_t lba_count,
     184             :                                   uint64_t zslba, uint32_t flags);
     185             : static int bdev_nvme_comparev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     186             :                               void *md, uint64_t lba_count, uint64_t lba,
     187             :                               uint32_t flags);
     188             : static int bdev_nvme_comparev_and_writev(struct nvme_bdev_io *bio,
     189             :                 struct iovec *cmp_iov, int cmp_iovcnt, struct iovec *write_iov,
     190             :                 int write_iovcnt, void *md, uint64_t lba_count, uint64_t lba,
     191             :                 uint32_t flags);
     192             : static int bdev_nvme_get_zone_info(struct nvme_bdev_io *bio, uint64_t zone_id,
     193             :                                    uint32_t num_zones, struct spdk_bdev_zone_info *info);
     194             : static int bdev_nvme_zone_management(struct nvme_bdev_io *bio, uint64_t zone_id,
     195             :                                      enum spdk_bdev_zone_action action);
     196             : static void bdev_nvme_admin_passthru(struct nvme_bdev_channel *nbdev_ch,
     197             :                                      struct nvme_bdev_io *bio,
     198             :                                      struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes);
     199             : static int bdev_nvme_io_passthru(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     200             :                                  void *buf, size_t nbytes);
     201             : static int bdev_nvme_io_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     202             :                                     void *buf, size_t nbytes, void *md_buf, size_t md_len);
     203             : static int bdev_nvme_iov_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     204             :                                      struct iovec *iov, int iovcnt, size_t nbytes,
     205             :                                      void *md_buf, size_t md_len);
     206             : static void bdev_nvme_abort(struct nvme_bdev_channel *nbdev_ch,
     207             :                             struct nvme_bdev_io *bio, struct nvme_bdev_io *bio_to_abort);
     208             : static void bdev_nvme_reset_io(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio);
     209             : static int bdev_nvme_reset_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
     210             : static int bdev_nvme_failover_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
     211             : static void remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr);
     212             : static int nvme_ctrlr_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr);
     213             : 
     214             : static struct nvme_ns *nvme_ns_alloc(void);
     215             : static void nvme_ns_free(struct nvme_ns *ns);
     216             : 
     217             : static int
     218         173 : nvme_ns_cmp(struct nvme_ns *ns1, struct nvme_ns *ns2)
     219             : {
     220         173 :         return ns1->id < ns2->id ? -1 : ns1->id > ns2->id;
     221             : }
     222             : 
     223         902 : RB_GENERATE_STATIC(nvme_ns_tree, nvme_ns, node, nvme_ns_cmp);
     224             : 
     225             : struct spdk_nvme_qpair *
     226           1 : bdev_nvme_get_io_qpair(struct spdk_io_channel *ctrlr_io_ch)
     227             : {
     228             :         struct nvme_ctrlr_channel *ctrlr_ch;
     229             : 
     230           1 :         assert(ctrlr_io_ch != NULL);
     231             : 
     232           1 :         ctrlr_ch = spdk_io_channel_get_ctx(ctrlr_io_ch);
     233             : 
     234           1 :         return ctrlr_ch->qpair->qpair;
     235             : }
     236             : 
     237             : static int
     238           0 : bdev_nvme_get_ctx_size(void)
     239             : {
     240           0 :         return sizeof(struct nvme_bdev_io);
     241             : }
     242             : 
     243             : static struct spdk_bdev_module nvme_if = {
     244             :         .name = "nvme",
     245             :         .async_fini = true,
     246             :         .module_init = bdev_nvme_library_init,
     247             :         .module_fini = bdev_nvme_library_fini,
     248             :         .config_json = bdev_nvme_config_json,
     249             :         .get_ctx_size = bdev_nvme_get_ctx_size,
     250             : 
     251             : };
     252           1 : SPDK_BDEV_MODULE_REGISTER(nvme, &nvme_if)
     253             : 
     254             : struct nvme_bdev_ctrlrs g_nvme_bdev_ctrlrs = TAILQ_HEAD_INITIALIZER(g_nvme_bdev_ctrlrs);
     255             : pthread_mutex_t g_bdev_nvme_mutex = PTHREAD_MUTEX_INITIALIZER;
     256             : bool g_bdev_nvme_module_finish;
     257             : 
     258             : struct nvme_bdev_ctrlr *
     259         270 : nvme_bdev_ctrlr_get_by_name(const char *name)
     260             : {
     261             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     262             : 
     263         270 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     264         148 :                 if (strcmp(name, nbdev_ctrlr->name) == 0) {
     265         148 :                         break;
     266             :                 }
     267             :         }
     268             : 
     269         270 :         return nbdev_ctrlr;
     270             : }
     271             : 
     272             : static struct nvme_ctrlr *
     273          58 : nvme_bdev_ctrlr_get_ctrlr(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     274             :                           const struct spdk_nvme_transport_id *trid)
     275             : {
     276             :         struct nvme_ctrlr *nvme_ctrlr;
     277             : 
     278          99 :         TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
     279          74 :                 if (spdk_nvme_transport_id_compare(trid, &nvme_ctrlr->active_path_id->trid) == 0) {
     280          33 :                         break;
     281             :                 }
     282             :         }
     283             : 
     284          58 :         return nvme_ctrlr;
     285             : }
     286             : 
     287             : struct nvme_ctrlr *
     288           0 : nvme_bdev_ctrlr_get_ctrlr_by_id(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     289             :                                 uint16_t cntlid)
     290             : {
     291             :         struct nvme_ctrlr *nvme_ctrlr;
     292             :         const struct spdk_nvme_ctrlr_data *cdata;
     293             : 
     294           0 :         TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
     295           0 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
     296           0 :                 if (cdata->cntlid == cntlid) {
     297           0 :                         break;
     298             :                 }
     299             :         }
     300             : 
     301           0 :         return nvme_ctrlr;
     302             : }
     303             : 
     304             : static struct nvme_bdev *
     305          72 : nvme_bdev_ctrlr_get_bdev(struct nvme_bdev_ctrlr *nbdev_ctrlr, uint32_t nsid)
     306             : {
     307             :         struct nvme_bdev *bdev;
     308             : 
     309          72 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     310         106 :         TAILQ_FOREACH(bdev, &nbdev_ctrlr->bdevs, tailq) {
     311          68 :                 if (bdev->nsid == nsid) {
     312          34 :                         break;
     313             :                 }
     314             :         }
     315          72 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     316             : 
     317          72 :         return bdev;
     318             : }
     319             : 
     320             : struct nvme_ns *
     321         139 : nvme_ctrlr_get_ns(struct nvme_ctrlr *nvme_ctrlr, uint32_t nsid)
     322             : {
     323         139 :         struct nvme_ns ns;
     324             : 
     325         139 :         assert(nsid > 0);
     326             : 
     327         139 :         ns.id = nsid;
     328         139 :         return RB_FIND(nvme_ns_tree, &nvme_ctrlr->namespaces, &ns);
     329             : }
     330             : 
     331             : struct nvme_ns *
     332         152 : nvme_ctrlr_get_first_active_ns(struct nvme_ctrlr *nvme_ctrlr)
     333             : {
     334         152 :         return RB_MIN(nvme_ns_tree, &nvme_ctrlr->namespaces);
     335             : }
     336             : 
     337             : struct nvme_ns *
     338          63 : nvme_ctrlr_get_next_active_ns(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *ns)
     339             : {
     340          63 :         if (ns == NULL) {
     341           0 :                 return NULL;
     342             :         }
     343             : 
     344          63 :         return RB_NEXT(nvme_ns_tree, &nvme_ctrlr->namespaces, ns);
     345             : }
     346             : 
     347             : static struct nvme_ctrlr *
     348          51 : nvme_ctrlr_get(const struct spdk_nvme_transport_id *trid)
     349             : {
     350             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
     351          51 :         struct nvme_ctrlr       *nvme_ctrlr = NULL;
     352             : 
     353          51 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     354          70 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     355          19 :                 nvme_ctrlr = nvme_bdev_ctrlr_get_ctrlr(nbdev_ctrlr, trid);
     356          19 :                 if (nvme_ctrlr != NULL) {
     357           0 :                         break;
     358             :                 }
     359             :         }
     360          51 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     361             : 
     362          51 :         return nvme_ctrlr;
     363             : }
     364             : 
     365             : struct nvme_ctrlr *
     366          71 : nvme_ctrlr_get_by_name(const char *name)
     367             : {
     368             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     369          71 :         struct nvme_ctrlr *nvme_ctrlr = NULL;
     370             : 
     371          71 :         if (name == NULL) {
     372           0 :                 return NULL;
     373             :         }
     374             : 
     375          71 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     376          71 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
     377          71 :         if (nbdev_ctrlr != NULL) {
     378          40 :                 nvme_ctrlr = TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
     379             :         }
     380          71 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     381             : 
     382          71 :         return nvme_ctrlr;
     383             : }
     384             : 
     385             : void
     386           0 : nvme_bdev_ctrlr_for_each(nvme_bdev_ctrlr_for_each_fn fn, void *ctx)
     387             : {
     388             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     389             : 
     390           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     391           0 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     392           0 :                 fn(nbdev_ctrlr, ctx);
     393             :         }
     394           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     395           0 : }
     396             : 
     397             : void
     398           0 : nvme_bdev_dump_trid_json(const struct spdk_nvme_transport_id *trid, struct spdk_json_write_ctx *w)
     399             : {
     400             :         const char *trtype_str;
     401             :         const char *adrfam_str;
     402             : 
     403           0 :         trtype_str = spdk_nvme_transport_id_trtype_str(trid->trtype);
     404           0 :         if (trtype_str) {
     405           0 :                 spdk_json_write_named_string(w, "trtype", trtype_str);
     406             :         }
     407             : 
     408           0 :         adrfam_str = spdk_nvme_transport_id_adrfam_str(trid->adrfam);
     409           0 :         if (adrfam_str) {
     410           0 :                 spdk_json_write_named_string(w, "adrfam", adrfam_str);
     411             :         }
     412             : 
     413           0 :         if (trid->traddr[0] != '\0') {
     414           0 :                 spdk_json_write_named_string(w, "traddr", trid->traddr);
     415             :         }
     416             : 
     417           0 :         if (trid->trsvcid[0] != '\0') {
     418           0 :                 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid);
     419             :         }
     420             : 
     421           0 :         if (trid->subnqn[0] != '\0') {
     422           0 :                 spdk_json_write_named_string(w, "subnqn", trid->subnqn);
     423             :         }
     424           0 : }
     425             : 
     426             : static void
     427          59 : nvme_bdev_ctrlr_delete(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     428             :                        struct nvme_ctrlr *nvme_ctrlr)
     429             : {
     430             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_delete, nvme_ctrlr->nbdev_ctrlr->name);
     431          59 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     432             : 
     433          59 :         TAILQ_REMOVE(&nbdev_ctrlr->ctrlrs, nvme_ctrlr, tailq);
     434          59 :         if (!TAILQ_EMPTY(&nbdev_ctrlr->ctrlrs)) {
     435          15 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
     436             : 
     437          15 :                 return;
     438             :         }
     439          44 :         TAILQ_REMOVE(&g_nvme_bdev_ctrlrs, nbdev_ctrlr, tailq);
     440             : 
     441          44 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     442             : 
     443          44 :         assert(TAILQ_EMPTY(&nbdev_ctrlr->bdevs));
     444             : 
     445          44 :         free(nbdev_ctrlr->name);
     446          44 :         free(nbdev_ctrlr);
     447             : }
     448             : 
     449             : static void
     450          60 : _nvme_ctrlr_delete(struct nvme_ctrlr *nvme_ctrlr)
     451             : {
     452             :         struct nvme_path_id *path_id, *tmp_path;
     453             :         struct nvme_ns *ns, *tmp_ns;
     454             : 
     455          60 :         free(nvme_ctrlr->copied_ana_desc);
     456          60 :         spdk_free(nvme_ctrlr->ana_log_page);
     457             : 
     458          60 :         if (nvme_ctrlr->opal_dev) {
     459           0 :                 spdk_opal_dev_destruct(nvme_ctrlr->opal_dev);
     460           0 :                 nvme_ctrlr->opal_dev = NULL;
     461             :         }
     462             : 
     463          60 :         if (nvme_ctrlr->nbdev_ctrlr) {
     464          59 :                 nvme_bdev_ctrlr_delete(nvme_ctrlr->nbdev_ctrlr, nvme_ctrlr);
     465             :         }
     466             : 
     467          60 :         RB_FOREACH_SAFE(ns, nvme_ns_tree, &nvme_ctrlr->namespaces, tmp_ns) {
     468           0 :                 RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, ns);
     469           0 :                 nvme_ns_free(ns);
     470             :         }
     471             : 
     472         120 :         TAILQ_FOREACH_SAFE(path_id, &nvme_ctrlr->trids, link, tmp_path) {
     473          60 :                 TAILQ_REMOVE(&nvme_ctrlr->trids, path_id, link);
     474          60 :                 free(path_id);
     475             :         }
     476             : 
     477          60 :         pthread_mutex_destroy(&nvme_ctrlr->mutex);
     478          60 :         spdk_keyring_put_key(nvme_ctrlr->psk);
     479          60 :         spdk_keyring_put_key(nvme_ctrlr->dhchap_key);
     480          60 :         spdk_keyring_put_key(nvme_ctrlr->dhchap_ctrlr_key);
     481          60 :         free(nvme_ctrlr);
     482             : 
     483          60 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     484          60 :         if (g_bdev_nvme_module_finish && TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
     485           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
     486           0 :                 spdk_io_device_unregister(&g_nvme_bdev_ctrlrs, NULL);
     487           0 :                 spdk_bdev_module_fini_done();
     488           0 :                 return;
     489             :         }
     490          60 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     491             : }
     492             : 
     493             : static int
     494          60 : nvme_detach_poller(void *arg)
     495             : {
     496          60 :         struct nvme_ctrlr *nvme_ctrlr = arg;
     497             :         int rc;
     498             : 
     499          60 :         rc = spdk_nvme_detach_poll_async(nvme_ctrlr->detach_ctx);
     500          60 :         if (rc != -EAGAIN) {
     501          60 :                 spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
     502          60 :                 _nvme_ctrlr_delete(nvme_ctrlr);
     503             :         }
     504             : 
     505          60 :         return SPDK_POLLER_BUSY;
     506             : }
     507             : 
     508             : static void
     509          60 : nvme_ctrlr_delete(struct nvme_ctrlr *nvme_ctrlr)
     510             : {
     511             :         int rc;
     512             : 
     513          60 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
     514             : 
     515             :         /* First, unregister the adminq poller, as the driver will poll adminq if necessary */
     516          60 :         spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
     517             : 
     518             :         /* If we got here, the reset/detach poller cannot be active */
     519          60 :         assert(nvme_ctrlr->reset_detach_poller == NULL);
     520          60 :         nvme_ctrlr->reset_detach_poller = SPDK_POLLER_REGISTER(nvme_detach_poller,
     521             :                                           nvme_ctrlr, 1000);
     522          60 :         if (nvme_ctrlr->reset_detach_poller == NULL) {
     523           0 :                 SPDK_ERRLOG("Failed to register detach poller\n");
     524           0 :                 goto error;
     525             :         }
     526             : 
     527          60 :         rc = spdk_nvme_detach_async(nvme_ctrlr->ctrlr, &nvme_ctrlr->detach_ctx);
     528          60 :         if (rc != 0) {
     529           0 :                 SPDK_ERRLOG("Failed to detach the NVMe controller\n");
     530           0 :                 goto error;
     531             :         }
     532             : 
     533          60 :         return;
     534           0 : error:
     535             :         /* We don't have a good way to handle errors here, so just do what we can and delete the
     536             :          * controller without detaching the underlying NVMe device.
     537             :          */
     538           0 :         spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
     539           0 :         _nvme_ctrlr_delete(nvme_ctrlr);
     540             : }
     541             : 
     542             : static void
     543          59 : nvme_ctrlr_unregister_cb(void *io_device)
     544             : {
     545          59 :         struct nvme_ctrlr *nvme_ctrlr = io_device;
     546             : 
     547          59 :         nvme_ctrlr_delete(nvme_ctrlr);
     548          59 : }
     549             : 
     550             : static void
     551          59 : nvme_ctrlr_unregister(void *ctx)
     552             : {
     553          59 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
     554             : 
     555          59 :         spdk_io_device_unregister(nvme_ctrlr, nvme_ctrlr_unregister_cb);
     556          59 : }
     557             : 
     558             : static bool
     559         220 : nvme_ctrlr_can_be_unregistered(struct nvme_ctrlr *nvme_ctrlr)
     560             : {
     561         220 :         if (!nvme_ctrlr->destruct) {
     562         105 :                 return false;
     563             :         }
     564             : 
     565         115 :         if (nvme_ctrlr->ref > 0) {
     566          56 :                 return false;
     567             :         }
     568             : 
     569          59 :         if (nvme_ctrlr->resetting) {
     570           0 :                 return false;
     571             :         }
     572             : 
     573          59 :         if (nvme_ctrlr->ana_log_page_updating) {
     574           0 :                 return false;
     575             :         }
     576             : 
     577          59 :         if (nvme_ctrlr->io_path_cache_clearing) {
     578           0 :                 return false;
     579             :         }
     580             : 
     581          59 :         return true;
     582             : }
     583             : 
     584             : static void
     585         164 : nvme_ctrlr_release(struct nvme_ctrlr *nvme_ctrlr)
     586             : {
     587         164 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
     588             :         SPDK_DTRACE_PROBE2(bdev_nvme_ctrlr_release, nvme_ctrlr->nbdev_ctrlr->name, nvme_ctrlr->ref);
     589             : 
     590         164 :         assert(nvme_ctrlr->ref > 0);
     591         164 :         nvme_ctrlr->ref--;
     592             : 
     593         164 :         if (!nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
     594         105 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
     595         105 :                 return;
     596             :         }
     597             : 
     598          59 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
     599             : 
     600          59 :         spdk_thread_exec_msg(nvme_ctrlr->thread, nvme_ctrlr_unregister, nvme_ctrlr);
     601             : }
     602             : 
     603             : static void
     604         161 : bdev_nvme_clear_current_io_path(struct nvme_bdev_channel *nbdev_ch)
     605             : {
     606         161 :         nbdev_ch->current_io_path = NULL;
     607         161 :         nbdev_ch->rr_counter = 0;
     608         161 : }
     609             : 
     610             : static struct nvme_io_path *
     611           8 : _bdev_nvme_get_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_ns)
     612             : {
     613             :         struct nvme_io_path *io_path;
     614             : 
     615          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
     616          15 :                 if (io_path->nvme_ns == nvme_ns) {
     617           7 :                         break;
     618             :                 }
     619             :         }
     620             : 
     621           8 :         return io_path;
     622             : }
     623             : 
     624             : static struct nvme_io_path *
     625          35 : nvme_io_path_alloc(void)
     626             : {
     627             :         struct nvme_io_path *io_path;
     628             : 
     629          35 :         io_path = calloc(1, sizeof(*io_path));
     630          35 :         if (io_path == NULL) {
     631           0 :                 SPDK_ERRLOG("Failed to alloc io_path.\n");
     632           0 :                 return NULL;
     633             :         }
     634             : 
     635          35 :         if (g_opts.io_path_stat) {
     636           0 :                 io_path->stat = calloc(1, sizeof(struct spdk_bdev_io_stat));
     637           0 :                 if (io_path->stat == NULL) {
     638           0 :                         free(io_path);
     639           0 :                         SPDK_ERRLOG("Failed to alloc io_path stat.\n");
     640           0 :                         return NULL;
     641             :                 }
     642           0 :                 spdk_bdev_reset_io_stat(io_path->stat, SPDK_BDEV_RESET_STAT_MAXMIN);
     643             :         }
     644             : 
     645          35 :         return io_path;
     646             : }
     647             : 
     648             : static void
     649          35 : nvme_io_path_free(struct nvme_io_path *io_path)
     650             : {
     651          35 :         free(io_path->stat);
     652          35 :         free(io_path);
     653          35 : }
     654             : 
     655             : static int
     656          35 : _bdev_nvme_add_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_ns)
     657             : {
     658             :         struct nvme_io_path *io_path;
     659             :         struct spdk_io_channel *ch;
     660             :         struct nvme_ctrlr_channel *ctrlr_ch;
     661             :         struct nvme_qpair *nvme_qpair;
     662             : 
     663          35 :         io_path = nvme_io_path_alloc();
     664          35 :         if (io_path == NULL) {
     665           0 :                 return -ENOMEM;
     666             :         }
     667             : 
     668          35 :         io_path->nvme_ns = nvme_ns;
     669             : 
     670          35 :         ch = spdk_get_io_channel(nvme_ns->ctrlr);
     671          35 :         if (ch == NULL) {
     672           0 :                 nvme_io_path_free(io_path);
     673           0 :                 SPDK_ERRLOG("Failed to alloc io_channel.\n");
     674           0 :                 return -ENOMEM;
     675             :         }
     676             : 
     677          35 :         ctrlr_ch = spdk_io_channel_get_ctx(ch);
     678             : 
     679          35 :         nvme_qpair = ctrlr_ch->qpair;
     680          35 :         assert(nvme_qpair != NULL);
     681             : 
     682          35 :         io_path->qpair = nvme_qpair;
     683          35 :         TAILQ_INSERT_TAIL(&nvme_qpair->io_path_list, io_path, tailq);
     684             : 
     685          35 :         io_path->nbdev_ch = nbdev_ch;
     686          35 :         STAILQ_INSERT_TAIL(&nbdev_ch->io_path_list, io_path, stailq);
     687             : 
     688          35 :         bdev_nvme_clear_current_io_path(nbdev_ch);
     689             : 
     690          35 :         return 0;
     691             : }
     692             : 
     693             : static void
     694          35 : bdev_nvme_clear_retry_io_path(struct nvme_bdev_channel *nbdev_ch,
     695             :                               struct nvme_io_path *io_path)
     696             : {
     697             :         struct spdk_bdev_io *bdev_io;
     698             :         struct nvme_bdev_io *bio;
     699             : 
     700          36 :         TAILQ_FOREACH(bdev_io, &nbdev_ch->retry_io_list, module_link) {
     701           1 :                 bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
     702           1 :                 if (bio->io_path == io_path) {
     703           1 :                         bio->io_path = NULL;
     704             :                 }
     705             :         }
     706          35 : }
     707             : 
     708             : static void
     709          35 : _bdev_nvme_delete_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_io_path *io_path)
     710             : {
     711             :         struct spdk_io_channel *ch;
     712             :         struct nvme_qpair *nvme_qpair;
     713             :         struct nvme_ctrlr_channel *ctrlr_ch;
     714             :         struct nvme_bdev *nbdev;
     715             : 
     716          35 :         nbdev = spdk_io_channel_get_io_device(spdk_io_channel_from_ctx(nbdev_ch));
     717             : 
     718             :         /* Add the statistics to nvme_ns before this path is destroyed. */
     719          35 :         pthread_mutex_lock(&nbdev->mutex);
     720          35 :         if (nbdev->ref != 0 && io_path->nvme_ns->stat != NULL && io_path->stat != NULL) {
     721           0 :                 spdk_bdev_add_io_stat(io_path->nvme_ns->stat, io_path->stat);
     722             :         }
     723          35 :         pthread_mutex_unlock(&nbdev->mutex);
     724             : 
     725          35 :         bdev_nvme_clear_current_io_path(nbdev_ch);
     726          35 :         bdev_nvme_clear_retry_io_path(nbdev_ch, io_path);
     727             : 
     728          35 :         STAILQ_REMOVE(&nbdev_ch->io_path_list, io_path, nvme_io_path, stailq);
     729          35 :         io_path->nbdev_ch = NULL;
     730             : 
     731          35 :         nvme_qpair = io_path->qpair;
     732          35 :         assert(nvme_qpair != NULL);
     733             : 
     734          35 :         ctrlr_ch = nvme_qpair->ctrlr_ch;
     735          35 :         assert(ctrlr_ch != NULL);
     736             : 
     737          35 :         ch = spdk_io_channel_from_ctx(ctrlr_ch);
     738          35 :         spdk_put_io_channel(ch);
     739             : 
     740             :         /* After an io_path is removed, I/Os submitted to it may complete and update statistics
     741             :          * of the io_path. To avoid heap-use-after-free error from this case, do not free the
     742             :          * io_path here but free the io_path when the associated qpair is freed. It is ensured
     743             :          * that all I/Os submitted to the io_path are completed when the associated qpair is freed.
     744             :          */
     745          35 : }
     746             : 
     747             : static void
     748          22 : _bdev_nvme_delete_io_paths(struct nvme_bdev_channel *nbdev_ch)
     749             : {
     750             :         struct nvme_io_path *io_path, *tmp_io_path;
     751             : 
     752          55 :         STAILQ_FOREACH_SAFE(io_path, &nbdev_ch->io_path_list, stailq, tmp_io_path) {
     753          33 :                 _bdev_nvme_delete_io_path(nbdev_ch, io_path);
     754             :         }
     755          22 : }
     756             : 
     757             : static int
     758          22 : bdev_nvme_create_bdev_channel_cb(void *io_device, void *ctx_buf)
     759             : {
     760          22 :         struct nvme_bdev_channel *nbdev_ch = ctx_buf;
     761          22 :         struct nvme_bdev *nbdev = io_device;
     762             :         struct nvme_ns *nvme_ns;
     763             :         int rc;
     764             : 
     765          22 :         STAILQ_INIT(&nbdev_ch->io_path_list);
     766          22 :         TAILQ_INIT(&nbdev_ch->retry_io_list);
     767             : 
     768          22 :         pthread_mutex_lock(&nbdev->mutex);
     769             : 
     770          22 :         nbdev_ch->mp_policy = nbdev->mp_policy;
     771          22 :         nbdev_ch->mp_selector = nbdev->mp_selector;
     772          22 :         nbdev_ch->rr_min_io = nbdev->rr_min_io;
     773             : 
     774          55 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
     775          33 :                 rc = _bdev_nvme_add_io_path(nbdev_ch, nvme_ns);
     776          33 :                 if (rc != 0) {
     777           0 :                         pthread_mutex_unlock(&nbdev->mutex);
     778             : 
     779           0 :                         _bdev_nvme_delete_io_paths(nbdev_ch);
     780           0 :                         return rc;
     781             :                 }
     782             :         }
     783          22 :         pthread_mutex_unlock(&nbdev->mutex);
     784             : 
     785          22 :         return 0;
     786             : }
     787             : 
     788             : /* If cpl != NULL, complete the bdev_io with nvme status based on 'cpl'.
     789             :  * If cpl == NULL, complete the bdev_io with bdev status based on 'status'.
     790             :  */
     791             : static inline void
     792          47 : __bdev_nvme_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status,
     793             :                         const struct spdk_nvme_cpl *cpl)
     794             : {
     795          47 :         spdk_trace_record(TRACE_BDEV_NVME_IO_DONE, 0, 0, (uintptr_t)bdev_io->driver_ctx,
     796             :                           (uintptr_t)bdev_io);
     797          47 :         if (cpl) {
     798          29 :                 spdk_bdev_io_complete_nvme_status(bdev_io, cpl->cdw0, cpl->status.sct, cpl->status.sc);
     799             :         } else {
     800          18 :                 spdk_bdev_io_complete(bdev_io, status);
     801             :         }
     802          47 : }
     803             : 
     804             : static void bdev_nvme_abort_retry_ios(struct nvme_bdev_channel *nbdev_ch);
     805             : 
     806             : static void
     807          22 : bdev_nvme_destroy_bdev_channel_cb(void *io_device, void *ctx_buf)
     808             : {
     809          22 :         struct nvme_bdev_channel *nbdev_ch = ctx_buf;
     810             : 
     811          22 :         bdev_nvme_abort_retry_ios(nbdev_ch);
     812          22 :         _bdev_nvme_delete_io_paths(nbdev_ch);
     813          22 : }
     814             : 
     815             : static inline bool
     816          58 : bdev_nvme_io_type_is_admin(enum spdk_bdev_io_type io_type)
     817             : {
     818          58 :         switch (io_type) {
     819           5 :         case SPDK_BDEV_IO_TYPE_RESET:
     820             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
     821             :         case SPDK_BDEV_IO_TYPE_ABORT:
     822           5 :                 return true;
     823          53 :         default:
     824          53 :                 break;
     825             :         }
     826             : 
     827          53 :         return false;
     828             : }
     829             : 
     830             : static inline bool
     831          77 : nvme_ns_is_active(struct nvme_ns *nvme_ns)
     832             : {
     833          77 :         if (spdk_unlikely(nvme_ns->ana_state_updating)) {
     834           1 :                 return false;
     835             :         }
     836             : 
     837          76 :         if (spdk_unlikely(nvme_ns->ns == NULL)) {
     838           0 :                 return false;
     839             :         }
     840             : 
     841          76 :         return true;
     842             : }
     843             : 
     844             : static inline bool
     845          65 : nvme_ns_is_accessible(struct nvme_ns *nvme_ns)
     846             : {
     847          65 :         if (spdk_unlikely(!nvme_ns_is_active(nvme_ns))) {
     848           1 :                 return false;
     849             :         }
     850             : 
     851          64 :         switch (nvme_ns->ana_state) {
     852          57 :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
     853             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
     854          57 :                 return true;
     855           7 :         default:
     856           7 :                 break;
     857             :         }
     858             : 
     859           7 :         return false;
     860             : }
     861             : 
     862             : static inline bool
     863         102 : nvme_qpair_is_connected(struct nvme_qpair *nvme_qpair)
     864             : {
     865         102 :         if (spdk_unlikely(nvme_qpair->qpair == NULL)) {
     866          20 :                 return false;
     867             :         }
     868             : 
     869          82 :         if (spdk_unlikely(spdk_nvme_qpair_get_failure_reason(nvme_qpair->qpair) !=
     870             :                           SPDK_NVME_QPAIR_FAILURE_NONE)) {
     871           0 :                 return false;
     872             :         }
     873             : 
     874          82 :         if (spdk_unlikely(nvme_qpair->ctrlr_ch->reset_iter != NULL)) {
     875           0 :                 return false;
     876             :         }
     877             : 
     878          82 :         return true;
     879             : }
     880             : 
     881             : static inline bool
     882          77 : nvme_io_path_is_available(struct nvme_io_path *io_path)
     883             : {
     884          77 :         if (spdk_unlikely(!nvme_qpair_is_connected(io_path->qpair))) {
     885          12 :                 return false;
     886             :         }
     887             : 
     888          65 :         if (spdk_unlikely(!nvme_ns_is_accessible(io_path->nvme_ns))) {
     889           8 :                 return false;
     890             :         }
     891             : 
     892          57 :         return true;
     893             : }
     894             : 
     895             : static inline bool
     896           8 : nvme_ctrlr_is_failed(struct nvme_ctrlr *nvme_ctrlr)
     897             : {
     898           8 :         if (nvme_ctrlr->destruct) {
     899           0 :                 return true;
     900             :         }
     901             : 
     902           8 :         if (nvme_ctrlr->fast_io_fail_timedout) {
     903           2 :                 return true;
     904             :         }
     905             : 
     906           6 :         if (nvme_ctrlr->resetting) {
     907           4 :                 if (nvme_ctrlr->opts.reconnect_delay_sec != 0) {
     908           4 :                         return false;
     909             :                 } else {
     910           0 :                         return true;
     911             :                 }
     912             :         }
     913             : 
     914           2 :         if (nvme_ctrlr->reconnect_is_delayed) {
     915           2 :                 return false;
     916             :         }
     917             : 
     918           0 :         if (nvme_ctrlr->disabled) {
     919           0 :                 return true;
     920             :         }
     921             : 
     922           0 :         if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
     923           0 :                 return true;
     924             :         } else {
     925           0 :                 return false;
     926             :         }
     927             : }
     928             : 
     929             : static bool
     930          20 : nvme_ctrlr_is_available(struct nvme_ctrlr *nvme_ctrlr)
     931             : {
     932          20 :         if (nvme_ctrlr->destruct) {
     933           0 :                 return false;
     934             :         }
     935             : 
     936          20 :         if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
     937           3 :                 return false;
     938             :         }
     939             : 
     940          17 :         if (nvme_ctrlr->resetting || nvme_ctrlr->reconnect_is_delayed) {
     941           1 :                 return false;
     942             :         }
     943             : 
     944          16 :         if (nvme_ctrlr->disabled) {
     945           0 :                 return false;
     946             :         }
     947             : 
     948          16 :         return true;
     949             : }
     950             : 
     951             : /* Simulate circular linked list. */
     952             : static inline struct nvme_io_path *
     953          87 : nvme_io_path_get_next(struct nvme_bdev_channel *nbdev_ch, struct nvme_io_path *prev_path)
     954             : {
     955             :         struct nvme_io_path *next_path;
     956             : 
     957          87 :         if (prev_path != NULL) {
     958          37 :                 next_path = STAILQ_NEXT(prev_path, stailq);
     959          37 :                 if (next_path != NULL) {
     960          14 :                         return next_path;
     961             :                 }
     962             :         }
     963             : 
     964          73 :         return STAILQ_FIRST(&nbdev_ch->io_path_list);
     965             : }
     966             : 
     967             : static struct nvme_io_path *
     968          57 : _bdev_nvme_find_io_path(struct nvme_bdev_channel *nbdev_ch)
     969             : {
     970          57 :         struct nvme_io_path *io_path, *start, *non_optimized = NULL;
     971             : 
     972          57 :         start = nvme_io_path_get_next(nbdev_ch, nbdev_ch->current_io_path);
     973             : 
     974          57 :         io_path = start;
     975             :         do {
     976          69 :                 if (spdk_likely(nvme_io_path_is_available(io_path))) {
     977          49 :                         switch (io_path->nvme_ns->ana_state) {
     978          39 :                         case SPDK_NVME_ANA_OPTIMIZED_STATE:
     979          39 :                                 nbdev_ch->current_io_path = io_path;
     980          39 :                                 return io_path;
     981          10 :                         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
     982          10 :                                 if (non_optimized == NULL) {
     983           7 :                                         non_optimized = io_path;
     984             :                                 }
     985          10 :                                 break;
     986           0 :                         default:
     987           0 :                                 assert(false);
     988             :                                 break;
     989             :                         }
     990          20 :                 }
     991          30 :                 io_path = nvme_io_path_get_next(nbdev_ch, io_path);
     992          30 :         } while (io_path != start);
     993             : 
     994          18 :         if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
     995             :                 /* We come here only if there is no optimized path. Cache even non_optimized
     996             :                  * path for load balance across multiple non_optimized paths.
     997             :                  */
     998           1 :                 nbdev_ch->current_io_path = non_optimized;
     999             :         }
    1000             : 
    1001          18 :         return non_optimized;
    1002             : }
    1003             : 
    1004             : static struct nvme_io_path *
    1005           4 : _bdev_nvme_find_io_path_min_qd(struct nvme_bdev_channel *nbdev_ch)
    1006             : {
    1007             :         struct nvme_io_path *io_path;
    1008           4 :         struct nvme_io_path *optimized = NULL, *non_optimized = NULL;
    1009           4 :         uint32_t opt_min_qd = UINT32_MAX, non_opt_min_qd = UINT32_MAX;
    1010             :         uint32_t num_outstanding_reqs;
    1011             : 
    1012          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    1013          12 :                 if (spdk_unlikely(!nvme_qpair_is_connected(io_path->qpair))) {
    1014             :                         /* The device is currently resetting. */
    1015           0 :                         continue;
    1016             :                 }
    1017             : 
    1018          12 :                 if (spdk_unlikely(!nvme_ns_is_active(io_path->nvme_ns))) {
    1019           0 :                         continue;
    1020             :                 }
    1021             : 
    1022          12 :                 num_outstanding_reqs = spdk_nvme_qpair_get_num_outstanding_reqs(io_path->qpair->qpair);
    1023          12 :                 switch (io_path->nvme_ns->ana_state) {
    1024           6 :                 case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1025           6 :                         if (num_outstanding_reqs < opt_min_qd) {
    1026           5 :                                 opt_min_qd = num_outstanding_reqs;
    1027           5 :                                 optimized = io_path;
    1028             :                         }
    1029           6 :                         break;
    1030           3 :                 case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1031           3 :                         if (num_outstanding_reqs < non_opt_min_qd) {
    1032           3 :                                 non_opt_min_qd = num_outstanding_reqs;
    1033           3 :                                 non_optimized = io_path;
    1034             :                         }
    1035           3 :                         break;
    1036           3 :                 default:
    1037           3 :                         break;
    1038             :                 }
    1039             :         }
    1040             : 
    1041             :         /* don't cache io path for BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH selector */
    1042           4 :         if (optimized != NULL) {
    1043           3 :                 return optimized;
    1044             :         }
    1045             : 
    1046           1 :         return non_optimized;
    1047             : }
    1048             : 
    1049             : static inline struct nvme_io_path *
    1050          95 : bdev_nvme_find_io_path(struct nvme_bdev_channel *nbdev_ch)
    1051             : {
    1052          95 :         if (spdk_likely(nbdev_ch->current_io_path != NULL)) {
    1053          41 :                 if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE) {
    1054          31 :                         return nbdev_ch->current_io_path;
    1055          10 :                 } else if (nbdev_ch->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    1056          10 :                         if (++nbdev_ch->rr_counter < nbdev_ch->rr_min_io) {
    1057           3 :                                 return nbdev_ch->current_io_path;
    1058             :                         }
    1059           7 :                         nbdev_ch->rr_counter = 0;
    1060             :                 }
    1061             :         }
    1062             : 
    1063          61 :         if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE ||
    1064          14 :             nbdev_ch->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    1065          57 :                 return _bdev_nvme_find_io_path(nbdev_ch);
    1066             :         } else {
    1067           4 :                 return _bdev_nvme_find_io_path_min_qd(nbdev_ch);
    1068             :         }
    1069             : }
    1070             : 
    1071             : /* Return true if there is any io_path whose qpair is active or ctrlr is not failed,
    1072             :  * or false otherwise.
    1073             :  *
    1074             :  * If any io_path has an active qpair but find_io_path() returned NULL, its namespace
    1075             :  * is likely to be non-accessible now but may become accessible.
    1076             :  *
    1077             :  * If any io_path has an unfailed ctrlr but find_io_path() returned NULL, the ctrlr
    1078             :  * is likely to be resetting now but the reset may succeed. A ctrlr is set to unfailed
    1079             :  * when starting to reset it but it is set to failed when the reset failed. Hence, if
    1080             :  * a ctrlr is unfailed, it is likely that it works fine or is resetting.
    1081             :  */
    1082             : static bool
    1083          13 : any_io_path_may_become_available(struct nvme_bdev_channel *nbdev_ch)
    1084             : {
    1085             :         struct nvme_io_path *io_path;
    1086             : 
    1087          15 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    1088          13 :                 if (io_path->nvme_ns->ana_transition_timedout) {
    1089           0 :                         continue;
    1090             :                 }
    1091             : 
    1092          13 :                 if (nvme_qpair_is_connected(io_path->qpair) ||
    1093           8 :                     !nvme_ctrlr_is_failed(io_path->qpair->ctrlr)) {
    1094          11 :                         return true;
    1095             :                 }
    1096             :         }
    1097             : 
    1098           2 :         return false;
    1099             : }
    1100             : 
    1101             : static void
    1102          14 : bdev_nvme_retry_io(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
    1103             : {
    1104          14 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    1105             :         struct spdk_io_channel *ch;
    1106             : 
    1107          14 :         if (nbdev_io->io_path != NULL && nvme_io_path_is_available(nbdev_io->io_path)) {
    1108           3 :                 _bdev_nvme_submit_request(nbdev_ch, bdev_io);
    1109             :         } else {
    1110          11 :                 ch = spdk_io_channel_from_ctx(nbdev_ch);
    1111          11 :                 bdev_nvme_submit_request(ch, bdev_io);
    1112             :         }
    1113          14 : }
    1114             : 
    1115             : static int
    1116          14 : bdev_nvme_retry_ios(void *arg)
    1117             : {
    1118          14 :         struct nvme_bdev_channel *nbdev_ch = arg;
    1119             :         struct spdk_bdev_io *bdev_io, *tmp_bdev_io;
    1120             :         struct nvme_bdev_io *bio;
    1121             :         uint64_t now, delay_us;
    1122             : 
    1123          14 :         now = spdk_get_ticks();
    1124             : 
    1125          28 :         TAILQ_FOREACH_SAFE(bdev_io, &nbdev_ch->retry_io_list, module_link, tmp_bdev_io) {
    1126          15 :                 bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    1127          15 :                 if (bio->retry_ticks > now) {
    1128           1 :                         break;
    1129             :                 }
    1130             : 
    1131          14 :                 TAILQ_REMOVE(&nbdev_ch->retry_io_list, bdev_io, module_link);
    1132             : 
    1133          14 :                 bdev_nvme_retry_io(nbdev_ch, bdev_io);
    1134             :         }
    1135             : 
    1136          14 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1137             : 
    1138          14 :         bdev_io = TAILQ_FIRST(&nbdev_ch->retry_io_list);
    1139          14 :         if (bdev_io != NULL) {
    1140           4 :                 bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    1141             : 
    1142           4 :                 delay_us = (bio->retry_ticks - now) * SPDK_SEC_TO_USEC / spdk_get_ticks_hz();
    1143             : 
    1144           4 :                 nbdev_ch->retry_io_poller = SPDK_POLLER_REGISTER(bdev_nvme_retry_ios, nbdev_ch,
    1145             :                                             delay_us);
    1146             :         }
    1147             : 
    1148          14 :         return SPDK_POLLER_BUSY;
    1149             : }
    1150             : 
    1151             : static void
    1152          15 : bdev_nvme_queue_retry_io(struct nvme_bdev_channel *nbdev_ch,
    1153             :                          struct nvme_bdev_io *bio, uint64_t delay_ms)
    1154             : {
    1155          15 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1156             :         struct spdk_bdev_io *tmp_bdev_io;
    1157             :         struct nvme_bdev_io *tmp_bio;
    1158             : 
    1159          15 :         bio->retry_ticks = spdk_get_ticks() + delay_ms * spdk_get_ticks_hz() / 1000ULL;
    1160             : 
    1161          15 :         TAILQ_FOREACH_REVERSE(tmp_bdev_io, &nbdev_ch->retry_io_list, retry_io_head, module_link) {
    1162           1 :                 tmp_bio = (struct nvme_bdev_io *)tmp_bdev_io->driver_ctx;
    1163             : 
    1164           1 :                 if (tmp_bio->retry_ticks <= bio->retry_ticks) {
    1165           1 :                         TAILQ_INSERT_AFTER(&nbdev_ch->retry_io_list, tmp_bdev_io, bdev_io,
    1166             :                                            module_link);
    1167           1 :                         return;
    1168             :                 }
    1169             :         }
    1170             : 
    1171             :         /* No earlier I/Os were found. This I/O must be the new head. */
    1172          14 :         TAILQ_INSERT_HEAD(&nbdev_ch->retry_io_list, bdev_io, module_link);
    1173             : 
    1174          14 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1175             : 
    1176          14 :         nbdev_ch->retry_io_poller = SPDK_POLLER_REGISTER(bdev_nvme_retry_ios, nbdev_ch,
    1177             :                                     delay_ms * 1000ULL);
    1178             : }
    1179             : 
    1180             : static void
    1181          36 : bdev_nvme_abort_retry_ios(struct nvme_bdev_channel *nbdev_ch)
    1182             : {
    1183             :         struct spdk_bdev_io *bdev_io, *tmp_io;
    1184             : 
    1185          36 :         TAILQ_FOREACH_SAFE(bdev_io, &nbdev_ch->retry_io_list, module_link, tmp_io) {
    1186           0 :                 TAILQ_REMOVE(&nbdev_ch->retry_io_list, bdev_io, module_link);
    1187           0 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED, NULL);
    1188             :         }
    1189             : 
    1190          36 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1191          36 : }
    1192             : 
    1193             : static int
    1194           6 : bdev_nvme_abort_retry_io(struct nvme_bdev_channel *nbdev_ch,
    1195             :                          struct nvme_bdev_io *bio_to_abort)
    1196             : {
    1197             :         struct spdk_bdev_io *bdev_io_to_abort;
    1198             : 
    1199           6 :         TAILQ_FOREACH(bdev_io_to_abort, &nbdev_ch->retry_io_list, module_link) {
    1200           1 :                 if ((struct nvme_bdev_io *)bdev_io_to_abort->driver_ctx == bio_to_abort) {
    1201           1 :                         TAILQ_REMOVE(&nbdev_ch->retry_io_list, bdev_io_to_abort, module_link);
    1202           1 :                         __bdev_nvme_io_complete(bdev_io_to_abort, SPDK_BDEV_IO_STATUS_ABORTED, NULL);
    1203           1 :                         return 0;
    1204             :                 }
    1205             :         }
    1206             : 
    1207           5 :         return -ENOENT;
    1208             : }
    1209             : 
    1210             : static void
    1211          12 : bdev_nvme_update_nvme_error_stat(struct spdk_bdev_io *bdev_io, const struct spdk_nvme_cpl *cpl)
    1212             : {
    1213             :         struct nvme_bdev *nbdev;
    1214             :         uint16_t sct, sc;
    1215             : 
    1216          12 :         assert(spdk_nvme_cpl_is_error(cpl));
    1217             : 
    1218          12 :         nbdev = bdev_io->bdev->ctxt;
    1219             : 
    1220          12 :         if (nbdev->err_stat == NULL) {
    1221          12 :                 return;
    1222             :         }
    1223             : 
    1224           0 :         sct = cpl->status.sct;
    1225           0 :         sc = cpl->status.sc;
    1226             : 
    1227           0 :         pthread_mutex_lock(&nbdev->mutex);
    1228             : 
    1229           0 :         nbdev->err_stat->status_type[sct]++;
    1230           0 :         switch (sct) {
    1231           0 :         case SPDK_NVME_SCT_GENERIC:
    1232             :         case SPDK_NVME_SCT_COMMAND_SPECIFIC:
    1233             :         case SPDK_NVME_SCT_MEDIA_ERROR:
    1234             :         case SPDK_NVME_SCT_PATH:
    1235           0 :                 nbdev->err_stat->status[sct][sc]++;
    1236           0 :                 break;
    1237           0 :         default:
    1238           0 :                 break;
    1239             :         }
    1240             : 
    1241           0 :         pthread_mutex_unlock(&nbdev->mutex);
    1242             : }
    1243             : 
    1244             : static inline void
    1245          20 : bdev_nvme_update_io_path_stat(struct nvme_bdev_io *bio)
    1246             : {
    1247          20 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1248          20 :         uint64_t num_blocks = bdev_io->u.bdev.num_blocks;
    1249          20 :         uint32_t blocklen = bdev_io->bdev->blocklen;
    1250             :         struct spdk_bdev_io_stat *stat;
    1251             :         uint64_t tsc_diff;
    1252             : 
    1253          20 :         if (bio->io_path->stat == NULL) {
    1254          20 :                 return;
    1255             :         }
    1256             : 
    1257           0 :         tsc_diff = spdk_get_ticks() - bio->submit_tsc;
    1258           0 :         stat = bio->io_path->stat;
    1259             : 
    1260           0 :         switch (bdev_io->type) {
    1261           0 :         case SPDK_BDEV_IO_TYPE_READ:
    1262           0 :                 stat->bytes_read += num_blocks * blocklen;
    1263           0 :                 stat->num_read_ops++;
    1264           0 :                 stat->read_latency_ticks += tsc_diff;
    1265           0 :                 if (stat->max_read_latency_ticks < tsc_diff) {
    1266           0 :                         stat->max_read_latency_ticks = tsc_diff;
    1267             :                 }
    1268           0 :                 if (stat->min_read_latency_ticks > tsc_diff) {
    1269           0 :                         stat->min_read_latency_ticks = tsc_diff;
    1270             :                 }
    1271           0 :                 break;
    1272           0 :         case SPDK_BDEV_IO_TYPE_WRITE:
    1273           0 :                 stat->bytes_written += num_blocks * blocklen;
    1274           0 :                 stat->num_write_ops++;
    1275           0 :                 stat->write_latency_ticks += tsc_diff;
    1276           0 :                 if (stat->max_write_latency_ticks < tsc_diff) {
    1277           0 :                         stat->max_write_latency_ticks = tsc_diff;
    1278             :                 }
    1279           0 :                 if (stat->min_write_latency_ticks > tsc_diff) {
    1280           0 :                         stat->min_write_latency_ticks = tsc_diff;
    1281             :                 }
    1282           0 :                 break;
    1283           0 :         case SPDK_BDEV_IO_TYPE_UNMAP:
    1284           0 :                 stat->bytes_unmapped += num_blocks * blocklen;
    1285           0 :                 stat->num_unmap_ops++;
    1286           0 :                 stat->unmap_latency_ticks += tsc_diff;
    1287           0 :                 if (stat->max_unmap_latency_ticks < tsc_diff) {
    1288           0 :                         stat->max_unmap_latency_ticks = tsc_diff;
    1289             :                 }
    1290           0 :                 if (stat->min_unmap_latency_ticks > tsc_diff) {
    1291           0 :                         stat->min_unmap_latency_ticks = tsc_diff;
    1292             :                 }
    1293           0 :                 break;
    1294           0 :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    1295             :                 /* Track the data in the start phase only */
    1296           0 :                 if (!bdev_io->u.bdev.zcopy.start) {
    1297           0 :                         break;
    1298             :                 }
    1299           0 :                 if (bdev_io->u.bdev.zcopy.populate) {
    1300           0 :                         stat->bytes_read += num_blocks * blocklen;
    1301           0 :                         stat->num_read_ops++;
    1302           0 :                         stat->read_latency_ticks += tsc_diff;
    1303           0 :                         if (stat->max_read_latency_ticks < tsc_diff) {
    1304           0 :                                 stat->max_read_latency_ticks = tsc_diff;
    1305             :                         }
    1306           0 :                         if (stat->min_read_latency_ticks > tsc_diff) {
    1307           0 :                                 stat->min_read_latency_ticks = tsc_diff;
    1308             :                         }
    1309             :                 } else {
    1310           0 :                         stat->bytes_written += num_blocks * blocklen;
    1311           0 :                         stat->num_write_ops++;
    1312           0 :                         stat->write_latency_ticks += tsc_diff;
    1313           0 :                         if (stat->max_write_latency_ticks < tsc_diff) {
    1314           0 :                                 stat->max_write_latency_ticks = tsc_diff;
    1315             :                         }
    1316           0 :                         if (stat->min_write_latency_ticks > tsc_diff) {
    1317           0 :                                 stat->min_write_latency_ticks = tsc_diff;
    1318             :                         }
    1319             :                 }
    1320           0 :                 break;
    1321           0 :         case SPDK_BDEV_IO_TYPE_COPY:
    1322           0 :                 stat->bytes_copied += num_blocks * blocklen;
    1323           0 :                 stat->num_copy_ops++;
    1324           0 :                 stat->copy_latency_ticks += tsc_diff;
    1325           0 :                 if (stat->max_copy_latency_ticks < tsc_diff) {
    1326           0 :                         stat->max_copy_latency_ticks = tsc_diff;
    1327             :                 }
    1328           0 :                 if (stat->min_copy_latency_ticks > tsc_diff) {
    1329           0 :                         stat->min_copy_latency_ticks = tsc_diff;
    1330             :                 }
    1331           0 :                 break;
    1332           0 :         default:
    1333           0 :                 break;
    1334             :         }
    1335             : }
    1336             : 
    1337             : static bool
    1338           7 : bdev_nvme_check_retry_io(struct nvme_bdev_io *bio,
    1339             :                          const struct spdk_nvme_cpl *cpl,
    1340             :                          struct nvme_bdev_channel *nbdev_ch,
    1341             :                          uint64_t *_delay_ms)
    1342             : {
    1343           7 :         struct nvme_io_path *io_path = bio->io_path;
    1344           7 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    1345             :         const struct spdk_nvme_ctrlr_data *cdata;
    1346             : 
    1347           7 :         if (spdk_nvme_cpl_is_path_error(cpl) ||
    1348           5 :             spdk_nvme_cpl_is_aborted_sq_deletion(cpl) ||
    1349           4 :             !nvme_io_path_is_available(io_path) ||
    1350           4 :             !nvme_ctrlr_is_available(nvme_ctrlr)) {
    1351           3 :                 bdev_nvme_clear_current_io_path(nbdev_ch);
    1352           3 :                 bio->io_path = NULL;
    1353           3 :                 if (spdk_nvme_cpl_is_ana_error(cpl)) {
    1354           1 :                         if (nvme_ctrlr_read_ana_log_page(nvme_ctrlr) == 0) {
    1355           1 :                                 io_path->nvme_ns->ana_state_updating = true;
    1356             :                         }
    1357             :                 }
    1358           3 :                 if (!any_io_path_may_become_available(nbdev_ch)) {
    1359           0 :                         return false;
    1360             :                 }
    1361           3 :                 *_delay_ms = 0;
    1362             :         } else {
    1363           4 :                 bio->retry_count++;
    1364             : 
    1365           4 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    1366             : 
    1367           4 :                 if (cpl->status.crd != 0) {
    1368           1 :                         *_delay_ms = cdata->crdt[cpl->status.crd] * 100;
    1369             :                 } else {
    1370           3 :                         *_delay_ms = 0;
    1371             :                 }
    1372             :         }
    1373             : 
    1374           7 :         return true;
    1375             : }
    1376             : 
    1377             : static inline void
    1378          32 : bdev_nvme_io_complete_nvme_status(struct nvme_bdev_io *bio,
    1379             :                                   const struct spdk_nvme_cpl *cpl)
    1380             : {
    1381          32 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1382             :         struct nvme_bdev_channel *nbdev_ch;
    1383          32 :         uint64_t delay_ms;
    1384             : 
    1385          32 :         assert(!bdev_nvme_io_type_is_admin(bdev_io->type));
    1386             : 
    1387          32 :         if (spdk_likely(spdk_nvme_cpl_is_success(cpl))) {
    1388          20 :                 bdev_nvme_update_io_path_stat(bio);
    1389          20 :                 goto complete;
    1390             :         }
    1391             : 
    1392             :         /* Update error counts before deciding if retry is needed.
    1393             :          * Hence, error counts may be more than the number of I/O errors.
    1394             :          */
    1395          12 :         bdev_nvme_update_nvme_error_stat(bdev_io, cpl);
    1396             : 
    1397          12 :         if (cpl->status.dnr != 0 || spdk_nvme_cpl_is_aborted_by_request(cpl) ||
    1398           8 :             (g_opts.bdev_retry_count != -1 && bio->retry_count >= g_opts.bdev_retry_count)) {
    1399           5 :                 goto complete;
    1400             :         }
    1401             : 
    1402             :         /* At this point we don't know whether the sequence was successfully executed or not, so we
    1403             :          * cannot retry the IO */
    1404           7 :         if (bdev_io->u.bdev.accel_sequence != NULL) {
    1405           0 :                 goto complete;
    1406             :         }
    1407             : 
    1408           7 :         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    1409             : 
    1410           7 :         if (bdev_nvme_check_retry_io(bio, cpl, nbdev_ch, &delay_ms)) {
    1411           7 :                 bdev_nvme_queue_retry_io(nbdev_ch, bio, delay_ms);
    1412           7 :                 return;
    1413             :         }
    1414             : 
    1415          25 : complete:
    1416          25 :         bio->retry_count = 0;
    1417          25 :         bio->submit_tsc = 0;
    1418          25 :         bdev_io->u.bdev.accel_sequence = NULL;
    1419          25 :         __bdev_nvme_io_complete(bdev_io, 0, cpl);
    1420             : }
    1421             : 
    1422             : static inline void
    1423          11 : bdev_nvme_io_complete(struct nvme_bdev_io *bio, int rc)
    1424             : {
    1425          11 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1426             :         struct nvme_bdev_channel *nbdev_ch;
    1427             :         enum spdk_bdev_io_status io_status;
    1428             : 
    1429          11 :         assert(!bdev_nvme_io_type_is_admin(bdev_io->type));
    1430             : 
    1431          11 :         switch (rc) {
    1432           1 :         case 0:
    1433           1 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    1434           1 :                 break;
    1435           0 :         case -ENOMEM:
    1436           0 :                 io_status = SPDK_BDEV_IO_STATUS_NOMEM;
    1437           0 :                 break;
    1438          10 :         case -ENXIO:
    1439          10 :                 if (g_opts.bdev_retry_count == -1 || bio->retry_count < g_opts.bdev_retry_count) {
    1440          10 :                         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    1441             : 
    1442          10 :                         bdev_nvme_clear_current_io_path(nbdev_ch);
    1443          10 :                         bio->io_path = NULL;
    1444             : 
    1445          10 :                         if (any_io_path_may_become_available(nbdev_ch)) {
    1446           8 :                                 bdev_nvme_queue_retry_io(nbdev_ch, bio, 1000ULL);
    1447           8 :                                 return;
    1448             :                         }
    1449             :                 }
    1450             : 
    1451             :         /* fallthrough */
    1452             :         default:
    1453           2 :                 spdk_accel_sequence_abort(bdev_io->u.bdev.accel_sequence);
    1454           2 :                 bdev_io->u.bdev.accel_sequence = NULL;
    1455           2 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    1456           2 :                 break;
    1457             :         }
    1458             : 
    1459           3 :         bio->retry_count = 0;
    1460           3 :         bio->submit_tsc = 0;
    1461           3 :         __bdev_nvme_io_complete(bdev_io, io_status, NULL);
    1462             : }
    1463             : 
    1464             : static inline void
    1465           4 : bdev_nvme_admin_complete(struct nvme_bdev_io *bio, int rc)
    1466             : {
    1467           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1468             :         enum spdk_bdev_io_status io_status;
    1469             : 
    1470           4 :         switch (rc) {
    1471           1 :         case 0:
    1472           1 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    1473           1 :                 break;
    1474           0 :         case -ENOMEM:
    1475           0 :                 io_status = SPDK_BDEV_IO_STATUS_NOMEM;
    1476           0 :                 break;
    1477           3 :         case -ENXIO:
    1478             :         /* fallthrough */
    1479             :         default:
    1480           3 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    1481           3 :                 break;
    1482             :         }
    1483             : 
    1484           4 :         __bdev_nvme_io_complete(bdev_io, io_status, NULL);
    1485           4 : }
    1486             : 
    1487             : static void
    1488           3 : bdev_nvme_clear_io_path_caches_done(struct spdk_io_channel_iter *i, int status)
    1489             : {
    1490           3 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    1491             : 
    1492           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    1493             : 
    1494           3 :         assert(nvme_ctrlr->io_path_cache_clearing == true);
    1495           3 :         nvme_ctrlr->io_path_cache_clearing = false;
    1496             : 
    1497           3 :         if (!nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    1498           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1499           3 :                 return;
    1500             :         }
    1501             : 
    1502           0 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1503             : 
    1504           0 :         nvme_ctrlr_unregister(nvme_ctrlr);
    1505             : }
    1506             : 
    1507             : static void
    1508         320 : _bdev_nvme_clear_io_path_cache(struct nvme_qpair *nvme_qpair)
    1509             : {
    1510             :         struct nvme_io_path *io_path;
    1511             : 
    1512         459 :         TAILQ_FOREACH(io_path, &nvme_qpair->io_path_list, tailq) {
    1513         139 :                 if (io_path->nbdev_ch == NULL) {
    1514          64 :                         continue;
    1515             :                 }
    1516          75 :                 bdev_nvme_clear_current_io_path(io_path->nbdev_ch);
    1517             :         }
    1518         320 : }
    1519             : 
    1520             : static void
    1521           1 : bdev_nvme_clear_io_path_cache(struct spdk_io_channel_iter *i)
    1522             : {
    1523           1 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    1524           1 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(_ch);
    1525             : 
    1526           1 :         assert(ctrlr_ch->qpair != NULL);
    1527             : 
    1528           1 :         _bdev_nvme_clear_io_path_cache(ctrlr_ch->qpair);
    1529             : 
    1530           1 :         spdk_for_each_channel_continue(i, 0);
    1531           1 : }
    1532             : 
    1533             : static void
    1534           3 : bdev_nvme_clear_io_path_caches(struct nvme_ctrlr *nvme_ctrlr)
    1535             : {
    1536           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    1537           3 :         if (!nvme_ctrlr_is_available(nvme_ctrlr) ||
    1538             :             nvme_ctrlr->io_path_cache_clearing) {
    1539           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1540           0 :                 return;
    1541             :         }
    1542             : 
    1543           3 :         nvme_ctrlr->io_path_cache_clearing = true;
    1544           3 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1545             : 
    1546           3 :         spdk_for_each_channel(nvme_ctrlr,
    1547             :                               bdev_nvme_clear_io_path_cache,
    1548             :                               NULL,
    1549             :                               bdev_nvme_clear_io_path_caches_done);
    1550             : }
    1551             : 
    1552             : static struct nvme_qpair *
    1553          99 : nvme_poll_group_get_qpair(struct nvme_poll_group *group, struct spdk_nvme_qpair *qpair)
    1554             : {
    1555             :         struct nvme_qpair *nvme_qpair;
    1556             : 
    1557         108 :         TAILQ_FOREACH(nvme_qpair, &group->qpair_list, tailq) {
    1558         108 :                 if (nvme_qpair->qpair == qpair) {
    1559          99 :                         break;
    1560             :                 }
    1561             :         }
    1562             : 
    1563          99 :         return nvme_qpair;
    1564             : }
    1565             : 
    1566             : static void nvme_qpair_delete(struct nvme_qpair *nvme_qpair);
    1567             : 
    1568             : static void
    1569          99 : bdev_nvme_disconnected_qpair_cb(struct spdk_nvme_qpair *qpair, void *poll_group_ctx)
    1570             : {
    1571          99 :         struct nvme_poll_group *group = poll_group_ctx;
    1572             :         struct nvme_qpair *nvme_qpair;
    1573             :         struct nvme_ctrlr_channel *ctrlr_ch;
    1574             :         int status;
    1575             : 
    1576          99 :         nvme_qpair = nvme_poll_group_get_qpair(group, qpair);
    1577          99 :         if (nvme_qpair == NULL) {
    1578           0 :                 return;
    1579             :         }
    1580             : 
    1581          99 :         if (nvme_qpair->qpair != NULL) {
    1582          99 :                 spdk_nvme_ctrlr_free_io_qpair(nvme_qpair->qpair);
    1583          99 :                 nvme_qpair->qpair = NULL;
    1584             :         }
    1585             : 
    1586          99 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1587             : 
    1588          99 :         ctrlr_ch = nvme_qpair->ctrlr_ch;
    1589             : 
    1590          99 :         if (ctrlr_ch != NULL) {
    1591          56 :                 if (ctrlr_ch->reset_iter != NULL) {
    1592             :                         /* We are in a full reset sequence. */
    1593          52 :                         if (ctrlr_ch->connect_poller != NULL) {
    1594             :                                 /* qpair was failed to connect. Abort the reset sequence. */
    1595           0 :                                 SPDK_DEBUGLOG(bdev_nvme, "qpair %p was failed to connect. abort the reset ctrlr sequence.\n",
    1596             :                                               qpair);
    1597           0 :                                 spdk_poller_unregister(&ctrlr_ch->connect_poller);
    1598           0 :                                 status = -1;
    1599             :                         } else {
    1600             :                                 /* qpair was completed to disconnect. Just move to the next ctrlr_channel. */
    1601          52 :                                 SPDK_DEBUGLOG(bdev_nvme, "qpair %p was disconnected and freed in a reset ctrlr sequence.\n",
    1602             :                                               qpair);
    1603          52 :                                 status = 0;
    1604             :                         }
    1605          52 :                         spdk_for_each_channel_continue(ctrlr_ch->reset_iter, status);
    1606          52 :                         ctrlr_ch->reset_iter = NULL;
    1607             :                 } else {
    1608             :                         /* qpair was disconnected unexpectedly. Reset controller for recovery. */
    1609           4 :                         SPDK_NOTICELOG("qpair %p was disconnected and freed. reset controller.\n", qpair);
    1610           4 :                         bdev_nvme_failover_ctrlr(nvme_qpair->ctrlr);
    1611             :                 }
    1612             :         } else {
    1613             :                 /* In this case, ctrlr_channel is already deleted. */
    1614          43 :                 SPDK_DEBUGLOG(bdev_nvme, "qpair %p was disconnected and freed. delete nvme_qpair.\n", qpair);
    1615          43 :                 nvme_qpair_delete(nvme_qpair);
    1616             :         }
    1617             : }
    1618             : 
    1619             : static void
    1620           0 : bdev_nvme_check_io_qpairs(struct nvme_poll_group *group)
    1621             : {
    1622             :         struct nvme_qpair *nvme_qpair;
    1623             : 
    1624           0 :         TAILQ_FOREACH(nvme_qpair, &group->qpair_list, tailq) {
    1625           0 :                 if (nvme_qpair->qpair == NULL || nvme_qpair->ctrlr_ch == NULL) {
    1626           0 :                         continue;
    1627             :                 }
    1628             : 
    1629           0 :                 if (spdk_nvme_qpair_get_failure_reason(nvme_qpair->qpair) !=
    1630             :                     SPDK_NVME_QPAIR_FAILURE_NONE) {
    1631           0 :                         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1632             :                 }
    1633             :         }
    1634           0 : }
    1635             : 
    1636             : static int
    1637        1025 : bdev_nvme_poll(void *arg)
    1638             : {
    1639        1025 :         struct nvme_poll_group *group = arg;
    1640             :         int64_t num_completions;
    1641             : 
    1642        1025 :         if (group->collect_spin_stat && group->start_ticks == 0) {
    1643           0 :                 group->start_ticks = spdk_get_ticks();
    1644             :         }
    1645             : 
    1646        1025 :         num_completions = spdk_nvme_poll_group_process_completions(group->group, 0,
    1647             :                           bdev_nvme_disconnected_qpair_cb);
    1648        1025 :         if (group->collect_spin_stat) {
    1649           0 :                 if (num_completions > 0) {
    1650           0 :                         if (group->end_ticks != 0) {
    1651           0 :                                 group->spin_ticks += (group->end_ticks - group->start_ticks);
    1652           0 :                                 group->end_ticks = 0;
    1653             :                         }
    1654           0 :                         group->start_ticks = 0;
    1655             :                 } else {
    1656           0 :                         group->end_ticks = spdk_get_ticks();
    1657             :                 }
    1658             :         }
    1659             : 
    1660        1025 :         if (spdk_unlikely(num_completions < 0)) {
    1661           0 :                 bdev_nvme_check_io_qpairs(group);
    1662             :         }
    1663             : 
    1664        1025 :         return num_completions > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
    1665             : }
    1666             : 
    1667             : static int bdev_nvme_poll_adminq(void *arg);
    1668             : 
    1669             : static void
    1670         100 : bdev_nvme_change_adminq_poll_period(struct nvme_ctrlr *nvme_ctrlr, uint64_t new_period_us)
    1671             : {
    1672         100 :         spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
    1673             : 
    1674         100 :         nvme_ctrlr->adminq_timer_poller = SPDK_POLLER_REGISTER(bdev_nvme_poll_adminq,
    1675             :                                           nvme_ctrlr, new_period_us);
    1676         100 : }
    1677             : 
    1678             : static int
    1679         146 : bdev_nvme_poll_adminq(void *arg)
    1680             : {
    1681             :         int32_t rc;
    1682         146 :         struct nvme_ctrlr *nvme_ctrlr = arg;
    1683             :         nvme_ctrlr_disconnected_cb disconnected_cb;
    1684             : 
    1685         146 :         assert(nvme_ctrlr != NULL);
    1686             : 
    1687         146 :         rc = spdk_nvme_ctrlr_process_admin_completions(nvme_ctrlr->ctrlr);
    1688         146 :         if (rc < 0) {
    1689          53 :                 disconnected_cb = nvme_ctrlr->disconnected_cb;
    1690          53 :                 nvme_ctrlr->disconnected_cb = NULL;
    1691             : 
    1692          53 :                 if (disconnected_cb != NULL) {
    1693          50 :                         bdev_nvme_change_adminq_poll_period(nvme_ctrlr,
    1694             :                                                             g_opts.nvme_adminq_poll_period_us);
    1695          50 :                         disconnected_cb(nvme_ctrlr);
    1696             :                 } else {
    1697           3 :                         bdev_nvme_failover_ctrlr(nvme_ctrlr);
    1698             :                 }
    1699          93 :         } else if (spdk_nvme_ctrlr_get_admin_qp_failure_reason(nvme_ctrlr->ctrlr) !=
    1700             :                    SPDK_NVME_QPAIR_FAILURE_NONE) {
    1701           0 :                 bdev_nvme_clear_io_path_caches(nvme_ctrlr);
    1702             :         }
    1703             : 
    1704         146 :         return rc == 0 ? SPDK_POLLER_IDLE : SPDK_POLLER_BUSY;
    1705             : }
    1706             : 
    1707             : static void
    1708          37 : nvme_bdev_free(void *io_device)
    1709             : {
    1710          37 :         struct nvme_bdev *nvme_disk = io_device;
    1711             : 
    1712          37 :         pthread_mutex_destroy(&nvme_disk->mutex);
    1713          37 :         free(nvme_disk->disk.name);
    1714          37 :         free(nvme_disk->err_stat);
    1715          37 :         free(nvme_disk);
    1716          37 : }
    1717             : 
    1718             : static int
    1719          36 : bdev_nvme_destruct(void *ctx)
    1720             : {
    1721          36 :         struct nvme_bdev *nvme_disk = ctx;
    1722             :         struct nvme_ns *nvme_ns, *tmp_nvme_ns;
    1723             : 
    1724             :         SPDK_DTRACE_PROBE2(bdev_nvme_destruct, nvme_disk->nbdev_ctrlr->name, nvme_disk->nsid);
    1725             : 
    1726          73 :         TAILQ_FOREACH_SAFE(nvme_ns, &nvme_disk->nvme_ns_list, tailq, tmp_nvme_ns) {
    1727          37 :                 pthread_mutex_lock(&nvme_ns->ctrlr->mutex);
    1728             : 
    1729          37 :                 nvme_ns->bdev = NULL;
    1730             : 
    1731          37 :                 assert(nvme_ns->id > 0);
    1732             : 
    1733          37 :                 if (nvme_ctrlr_get_ns(nvme_ns->ctrlr, nvme_ns->id) == NULL) {
    1734           0 :                         pthread_mutex_unlock(&nvme_ns->ctrlr->mutex);
    1735             : 
    1736           0 :                         nvme_ctrlr_release(nvme_ns->ctrlr);
    1737           0 :                         nvme_ns_free(nvme_ns);
    1738             :                 } else {
    1739          37 :                         pthread_mutex_unlock(&nvme_ns->ctrlr->mutex);
    1740             :                 }
    1741             :         }
    1742             : 
    1743          36 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    1744          36 :         TAILQ_REMOVE(&nvme_disk->nbdev_ctrlr->bdevs, nvme_disk, tailq);
    1745          36 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    1746             : 
    1747          36 :         spdk_io_device_unregister(nvme_disk, nvme_bdev_free);
    1748             : 
    1749          36 :         return 0;
    1750             : }
    1751             : 
    1752             : static int
    1753         100 : bdev_nvme_create_qpair(struct nvme_qpair *nvme_qpair)
    1754             : {
    1755             :         struct nvme_ctrlr *nvme_ctrlr;
    1756         100 :         struct spdk_nvme_io_qpair_opts opts;
    1757             :         struct spdk_nvme_qpair *qpair;
    1758             :         int rc;
    1759             : 
    1760         100 :         nvme_ctrlr = nvme_qpair->ctrlr;
    1761             : 
    1762         100 :         spdk_nvme_ctrlr_get_default_io_qpair_opts(nvme_ctrlr->ctrlr, &opts, sizeof(opts));
    1763         100 :         opts.delay_cmd_submit = g_opts.delay_cmd_submit;
    1764         100 :         opts.create_only = true;
    1765         100 :         opts.async_mode = true;
    1766         100 :         opts.io_queue_requests = spdk_max(g_opts.io_queue_requests, opts.io_queue_requests);
    1767         100 :         g_opts.io_queue_requests = opts.io_queue_requests;
    1768             : 
    1769         100 :         qpair = spdk_nvme_ctrlr_alloc_io_qpair(nvme_ctrlr->ctrlr, &opts, sizeof(opts));
    1770         100 :         if (qpair == NULL) {
    1771           0 :                 return -1;
    1772             :         }
    1773             : 
    1774             :         SPDK_DTRACE_PROBE3(bdev_nvme_create_qpair, nvme_ctrlr->nbdev_ctrlr->name,
    1775             :                            spdk_nvme_qpair_get_id(qpair), spdk_thread_get_id(nvme_ctrlr->thread));
    1776             : 
    1777         100 :         assert(nvme_qpair->group != NULL);
    1778             : 
    1779         100 :         rc = spdk_nvme_poll_group_add(nvme_qpair->group->group, qpair);
    1780         100 :         if (rc != 0) {
    1781           0 :                 SPDK_ERRLOG("Unable to begin polling on NVMe Channel.\n");
    1782           0 :                 goto err;
    1783             :         }
    1784             : 
    1785         100 :         rc = spdk_nvme_ctrlr_connect_io_qpair(nvme_ctrlr->ctrlr, qpair);
    1786         100 :         if (rc != 0) {
    1787           0 :                 SPDK_ERRLOG("Unable to connect I/O qpair.\n");
    1788           0 :                 goto err;
    1789             :         }
    1790             : 
    1791         100 :         nvme_qpair->qpair = qpair;
    1792             : 
    1793         100 :         if (!g_opts.disable_auto_failback) {
    1794          71 :                 _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1795             :         }
    1796             : 
    1797         100 :         return 0;
    1798             : 
    1799           0 : err:
    1800           0 :         spdk_nvme_ctrlr_free_io_qpair(qpair);
    1801             : 
    1802           0 :         return rc;
    1803             : }
    1804             : 
    1805             : static void bdev_nvme_reset_io_continue(void *cb_arg, int rc);
    1806             : 
    1807             : static void
    1808          82 : bdev_nvme_complete_pending_resets(struct spdk_io_channel_iter *i)
    1809             : {
    1810          82 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    1811          82 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(_ch);
    1812          82 :         int rc = 0;
    1813             :         struct spdk_bdev_io *bdev_io;
    1814             :         struct nvme_bdev_io *bio;
    1815             : 
    1816          82 :         if (spdk_io_channel_iter_get_ctx(i) != NULL) {
    1817          35 :                 rc = -1;
    1818             :         }
    1819             : 
    1820          86 :         while (!TAILQ_EMPTY(&ctrlr_ch->pending_resets)) {
    1821           4 :                 bdev_io = TAILQ_FIRST(&ctrlr_ch->pending_resets);
    1822           4 :                 TAILQ_REMOVE(&ctrlr_ch->pending_resets, bdev_io, module_link);
    1823             : 
    1824           4 :                 bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    1825           4 :                 bdev_nvme_reset_io_continue(bio, rc);
    1826             :         }
    1827             : 
    1828          82 :         spdk_for_each_channel_continue(i, 0);
    1829          82 : }
    1830             : 
    1831             : /* This function marks the current trid as failed by storing the current ticks
    1832             :  * and then sets the next trid to the active trid within a controller if exists.
    1833             :  *
    1834             :  * The purpose of the boolean return value is to request the caller to disconnect
    1835             :  * the current trid now to try connecting the next trid.
    1836             :  */
    1837             : static bool
    1838          36 : bdev_nvme_failover_trid(struct nvme_ctrlr *nvme_ctrlr, bool remove, bool start)
    1839             : {
    1840             :         struct nvme_path_id *path_id, *next_path;
    1841             :         int rc __attribute__((unused));
    1842             : 
    1843          36 :         path_id = TAILQ_FIRST(&nvme_ctrlr->trids);
    1844          36 :         assert(path_id);
    1845          36 :         assert(path_id == nvme_ctrlr->active_path_id);
    1846          36 :         next_path = TAILQ_NEXT(path_id, link);
    1847             : 
    1848             :         /* Update the last failed time. It means the trid is failed if its last
    1849             :          * failed time is non-zero.
    1850             :          */
    1851          36 :         path_id->last_failed_tsc = spdk_get_ticks();
    1852             : 
    1853          36 :         if (next_path == NULL) {
    1854             :                 /* There is no alternate trid within a controller. */
    1855          25 :                 return false;
    1856             :         }
    1857             : 
    1858          11 :         if (!start && nvme_ctrlr->opts.reconnect_delay_sec == 0) {
    1859             :                 /* Connect is not retried in a controller reset sequence. Connecting
    1860             :                  * the next trid will be done by the next bdev_nvme_failover_ctrlr() call.
    1861             :                  */
    1862           3 :                 return false;
    1863             :         }
    1864             : 
    1865           8 :         assert(path_id->trid.trtype != SPDK_NVME_TRANSPORT_PCIE);
    1866             : 
    1867           8 :         SPDK_NOTICELOG("Start failover from %s:%s to %s:%s\n", path_id->trid.traddr,
    1868             :                        path_id->trid.trsvcid,        next_path->trid.traddr, next_path->trid.trsvcid);
    1869             : 
    1870           8 :         spdk_nvme_ctrlr_fail(nvme_ctrlr->ctrlr);
    1871           8 :         nvme_ctrlr->active_path_id = next_path;
    1872           8 :         rc = spdk_nvme_ctrlr_set_trid(nvme_ctrlr->ctrlr, &next_path->trid);
    1873           8 :         assert(rc == 0);
    1874           8 :         TAILQ_REMOVE(&nvme_ctrlr->trids, path_id, link);
    1875           8 :         if (!remove) {
    1876             :                 /** Shuffle the old trid to the end of the list and use the new one.
    1877             :                  * Allows for round robin through multiple connections.
    1878             :                  */
    1879           6 :                 TAILQ_INSERT_TAIL(&nvme_ctrlr->trids, path_id, link);
    1880             :         } else {
    1881           2 :                 free(path_id);
    1882             :         }
    1883             : 
    1884           8 :         if (start || next_path->last_failed_tsc == 0) {
    1885             :                 /* bdev_nvme_failover_ctrlr() is just called or the next trid is not failed
    1886             :                  * or used yet. Try the next trid now.
    1887             :                  */
    1888           7 :                 return true;
    1889             :         }
    1890             : 
    1891           1 :         if (spdk_get_ticks() > next_path->last_failed_tsc + spdk_get_ticks_hz() *
    1892           1 :             nvme_ctrlr->opts.reconnect_delay_sec) {
    1893             :                 /* Enough backoff passed since the next trid failed. Try the next trid now. */
    1894           0 :                 return true;
    1895             :         }
    1896             : 
    1897             :         /* The next trid will be tried after reconnect_delay_sec seconds. */
    1898           1 :         return false;
    1899             : }
    1900             : 
    1901             : static bool
    1902          68 : bdev_nvme_check_ctrlr_loss_timeout(struct nvme_ctrlr *nvme_ctrlr)
    1903             : {
    1904             :         int32_t elapsed;
    1905             : 
    1906          68 :         if (nvme_ctrlr->opts.ctrlr_loss_timeout_sec == 0 ||
    1907          36 :             nvme_ctrlr->opts.ctrlr_loss_timeout_sec == -1) {
    1908          42 :                 return false;
    1909             :         }
    1910             : 
    1911          26 :         elapsed = (spdk_get_ticks() - nvme_ctrlr->reset_start_tsc) / spdk_get_ticks_hz();
    1912          26 :         if (elapsed >= nvme_ctrlr->opts.ctrlr_loss_timeout_sec) {
    1913           6 :                 return true;
    1914             :         } else {
    1915          20 :                 return false;
    1916             :         }
    1917             : }
    1918             : 
    1919             : static bool
    1920          12 : bdev_nvme_check_fast_io_fail_timeout(struct nvme_ctrlr *nvme_ctrlr)
    1921             : {
    1922             :         uint32_t elapsed;
    1923             : 
    1924          12 :         if (nvme_ctrlr->opts.fast_io_fail_timeout_sec == 0) {
    1925           8 :                 return false;
    1926             :         }
    1927             : 
    1928           4 :         elapsed = (spdk_get_ticks() - nvme_ctrlr->reset_start_tsc) / spdk_get_ticks_hz();
    1929           4 :         if (elapsed >= nvme_ctrlr->opts.fast_io_fail_timeout_sec) {
    1930           2 :                 return true;
    1931             :         } else {
    1932           2 :                 return false;
    1933             :         }
    1934             : }
    1935             : 
    1936             : static void bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, bool success);
    1937             : 
    1938             : static void
    1939          51 : nvme_ctrlr_disconnect(struct nvme_ctrlr *nvme_ctrlr, nvme_ctrlr_disconnected_cb cb_fn)
    1940             : {
    1941             :         int rc;
    1942             : 
    1943          51 :         rc = spdk_nvme_ctrlr_disconnect(nvme_ctrlr->ctrlr);
    1944          51 :         if (rc != 0) {
    1945             :                 /* Disconnect fails if ctrlr is already resetting or removed. In this case,
    1946             :                  * fail the reset sequence immediately.
    1947             :                  */
    1948           1 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    1949           1 :                 return;
    1950             :         }
    1951             : 
    1952             :         /* spdk_nvme_ctrlr_disconnect() may complete asynchronously later by polling adminq.
    1953             :          * Set callback here to execute the specified operation after ctrlr is really disconnected.
    1954             :          */
    1955          50 :         assert(nvme_ctrlr->disconnected_cb == NULL);
    1956          50 :         nvme_ctrlr->disconnected_cb = cb_fn;
    1957             : 
    1958             :         /* During disconnection, reduce the period to poll adminq more often. */
    1959          50 :         bdev_nvme_change_adminq_poll_period(nvme_ctrlr, 0);
    1960             : }
    1961             : 
    1962             : enum bdev_nvme_op_after_reset {
    1963             :         OP_NONE,
    1964             :         OP_COMPLETE_PENDING_DESTRUCT,
    1965             :         OP_DESTRUCT,
    1966             :         OP_DELAYED_RECONNECT,
    1967             :         OP_FAILOVER,
    1968             : };
    1969             : 
    1970             : typedef enum bdev_nvme_op_after_reset _bdev_nvme_op_after_reset;
    1971             : 
    1972             : static _bdev_nvme_op_after_reset
    1973          50 : bdev_nvme_check_op_after_reset(struct nvme_ctrlr *nvme_ctrlr, bool success)
    1974             : {
    1975          50 :         if (nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    1976             :                 /* Complete pending destruct after reset completes. */
    1977           0 :                 return OP_COMPLETE_PENDING_DESTRUCT;
    1978          50 :         } else if (nvme_ctrlr->pending_failover) {
    1979           3 :                 nvme_ctrlr->pending_failover = false;
    1980           3 :                 nvme_ctrlr->reset_start_tsc = 0;
    1981           3 :                 return OP_FAILOVER;
    1982          47 :         } else if (success || nvme_ctrlr->opts.reconnect_delay_sec == 0) {
    1983          33 :                 nvme_ctrlr->reset_start_tsc = 0;
    1984          33 :                 return OP_NONE;
    1985          14 :         } else if (bdev_nvme_check_ctrlr_loss_timeout(nvme_ctrlr)) {
    1986           2 :                 return OP_DESTRUCT;
    1987             :         } else {
    1988          12 :                 if (bdev_nvme_check_fast_io_fail_timeout(nvme_ctrlr)) {
    1989           2 :                         nvme_ctrlr->fast_io_fail_timedout = true;
    1990             :                 }
    1991          12 :                 return OP_DELAYED_RECONNECT;
    1992             :         }
    1993             : }
    1994             : 
    1995             : static int bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug);
    1996             : static void bdev_nvme_reconnect_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
    1997             : 
    1998             : static int
    1999           9 : bdev_nvme_reconnect_delay_timer_expired(void *ctx)
    2000             : {
    2001           9 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2002             : 
    2003             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reconnect_delay, nvme_ctrlr->nbdev_ctrlr->name);
    2004           9 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2005             : 
    2006           9 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2007             : 
    2008           9 :         if (!nvme_ctrlr->reconnect_is_delayed) {
    2009           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2010           0 :                 return SPDK_POLLER_BUSY;
    2011             :         }
    2012             : 
    2013           9 :         nvme_ctrlr->reconnect_is_delayed = false;
    2014             : 
    2015           9 :         if (nvme_ctrlr->destruct) {
    2016           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2017           0 :                 return SPDK_POLLER_BUSY;
    2018             :         }
    2019             : 
    2020           9 :         assert(nvme_ctrlr->resetting == false);
    2021           9 :         nvme_ctrlr->resetting = true;
    2022             : 
    2023           9 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2024             : 
    2025           9 :         spdk_poller_resume(nvme_ctrlr->adminq_timer_poller);
    2026             : 
    2027           9 :         bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2028           9 :         return SPDK_POLLER_BUSY;
    2029             : }
    2030             : 
    2031             : static void
    2032          12 : bdev_nvme_start_reconnect_delay_timer(struct nvme_ctrlr *nvme_ctrlr)
    2033             : {
    2034          12 :         spdk_poller_pause(nvme_ctrlr->adminq_timer_poller);
    2035             : 
    2036          12 :         assert(nvme_ctrlr->reconnect_is_delayed == false);
    2037          12 :         nvme_ctrlr->reconnect_is_delayed = true;
    2038             : 
    2039          12 :         assert(nvme_ctrlr->reconnect_delay_timer == NULL);
    2040          12 :         nvme_ctrlr->reconnect_delay_timer = SPDK_POLLER_REGISTER(bdev_nvme_reconnect_delay_timer_expired,
    2041             :                                             nvme_ctrlr,
    2042             :                                             nvme_ctrlr->opts.reconnect_delay_sec * SPDK_SEC_TO_USEC);
    2043          12 : }
    2044             : 
    2045             : static void remove_discovery_entry(struct nvme_ctrlr *nvme_ctrlr);
    2046             : 
    2047             : static void
    2048          48 : _bdev_nvme_reset_ctrlr_complete(struct spdk_io_channel_iter *i, int status)
    2049             : {
    2050          48 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    2051          48 :         bool success = spdk_io_channel_iter_get_ctx(i) == NULL;
    2052          48 :         bdev_nvme_ctrlr_op_cb ctrlr_op_cb_fn = nvme_ctrlr->ctrlr_op_cb_fn;
    2053          48 :         void *ctrlr_op_cb_arg = nvme_ctrlr->ctrlr_op_cb_arg;
    2054             :         enum bdev_nvme_op_after_reset op_after_reset;
    2055             : 
    2056          48 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2057             : 
    2058          48 :         nvme_ctrlr->ctrlr_op_cb_fn = NULL;
    2059          48 :         nvme_ctrlr->ctrlr_op_cb_arg = NULL;
    2060             : 
    2061          48 :         if (!success) {
    2062          21 :                 SPDK_ERRLOG("Resetting controller failed.\n");
    2063             :         } else {
    2064          27 :                 SPDK_NOTICELOG("Resetting controller successful.\n");
    2065             :         }
    2066             : 
    2067          48 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2068          48 :         nvme_ctrlr->resetting = false;
    2069          48 :         nvme_ctrlr->dont_retry = false;
    2070          48 :         nvme_ctrlr->in_failover = false;
    2071             : 
    2072          48 :         op_after_reset = bdev_nvme_check_op_after_reset(nvme_ctrlr, success);
    2073          48 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2074             : 
    2075             :         /* Delay callbacks when the next operation is a failover. */
    2076          48 :         if (ctrlr_op_cb_fn && op_after_reset != OP_FAILOVER) {
    2077          10 :                 ctrlr_op_cb_fn(ctrlr_op_cb_arg, success ? 0 : -1);
    2078             :         }
    2079             : 
    2080          48 :         switch (op_after_reset) {
    2081           0 :         case OP_COMPLETE_PENDING_DESTRUCT:
    2082           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    2083           0 :                 break;
    2084           2 :         case OP_DESTRUCT:
    2085           2 :                 bdev_nvme_delete_ctrlr(nvme_ctrlr, false);
    2086           2 :                 remove_discovery_entry(nvme_ctrlr);
    2087           2 :                 break;
    2088          12 :         case OP_DELAYED_RECONNECT:
    2089          12 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_start_reconnect_delay_timer);
    2090          12 :                 break;
    2091           3 :         case OP_FAILOVER:
    2092           3 :                 nvme_ctrlr->ctrlr_op_cb_fn = ctrlr_op_cb_fn;
    2093           3 :                 nvme_ctrlr->ctrlr_op_cb_arg = ctrlr_op_cb_arg;
    2094           3 :                 bdev_nvme_failover_ctrlr(nvme_ctrlr);
    2095           3 :                 break;
    2096          31 :         default:
    2097          31 :                 break;
    2098             :         }
    2099          48 : }
    2100             : 
    2101             : static void
    2102          50 : bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, bool success)
    2103             : {
    2104          50 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2105          50 :         if (!success) {
    2106             :                 /* Connecting the active trid failed. Set the next alternate trid to the
    2107             :                  * active trid if it exists.
    2108             :                  */
    2109          23 :                 if (bdev_nvme_failover_trid(nvme_ctrlr, false, false)) {
    2110             :                         /* The next alternate trid exists and is ready to try. Try it now. */
    2111           2 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2112             : 
    2113           2 :                         nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reconnect_ctrlr);
    2114           2 :                         return;
    2115             :                 }
    2116             : 
    2117             :                 /* We came here if there is no alternate trid or if the next trid exists but
    2118             :                  * is not ready to try. We will try the active trid after reconnect_delay_sec
    2119             :                  * seconds if it is non-zero or at the next reset call otherwise.
    2120             :                  */
    2121             :         } else {
    2122             :                 /* Connecting the active trid succeeded. Clear the last failed time because it
    2123             :                  * means the trid is failed if its last failed time is non-zero.
    2124             :                  */
    2125          27 :                 nvme_ctrlr->active_path_id->last_failed_tsc = 0;
    2126             :         }
    2127          48 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2128             : 
    2129             :         /* Make sure we clear any pending resets before returning. */
    2130          48 :         spdk_for_each_channel(nvme_ctrlr,
    2131             :                               bdev_nvme_complete_pending_resets,
    2132             :                               success ? NULL : (void *)0x1,
    2133             :                               _bdev_nvme_reset_ctrlr_complete);
    2134             : }
    2135             : 
    2136             : static void
    2137           0 : bdev_nvme_reset_create_qpairs_failed(struct spdk_io_channel_iter *i, int status)
    2138             : {
    2139           0 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    2140             : 
    2141           0 :         bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2142           0 : }
    2143             : 
    2144             : static void
    2145          62 : bdev_nvme_reset_destroy_qpair(struct spdk_io_channel_iter *i)
    2146             : {
    2147          62 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
    2148          62 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(ch);
    2149             :         struct nvme_qpair *nvme_qpair;
    2150             : 
    2151          62 :         nvme_qpair = ctrlr_ch->qpair;
    2152          62 :         assert(nvme_qpair != NULL);
    2153             : 
    2154          62 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    2155             : 
    2156          62 :         if (nvme_qpair->qpair != NULL) {
    2157          52 :                 if (nvme_qpair->ctrlr->dont_retry) {
    2158          39 :                         spdk_nvme_qpair_set_abort_dnr(nvme_qpair->qpair, true);
    2159             :                 }
    2160          52 :                 spdk_nvme_ctrlr_disconnect_io_qpair(nvme_qpair->qpair);
    2161             : 
    2162             :                 /* The current full reset sequence will move to the next
    2163             :                  * ctrlr_channel after the qpair is actually disconnected.
    2164             :                  */
    2165          52 :                 assert(ctrlr_ch->reset_iter == NULL);
    2166          52 :                 ctrlr_ch->reset_iter = i;
    2167             :         } else {
    2168          10 :                 spdk_for_each_channel_continue(i, 0);
    2169             :         }
    2170          62 : }
    2171             : 
    2172             : static void
    2173          27 : bdev_nvme_reset_create_qpairs_done(struct spdk_io_channel_iter *i, int status)
    2174             : {
    2175          27 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    2176             : 
    2177          27 :         if (status == 0) {
    2178          27 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, true);
    2179             :         } else {
    2180             :                 /* Delete the added qpairs and quiesce ctrlr to make the states clean. */
    2181           0 :                 spdk_for_each_channel(nvme_ctrlr,
    2182             :                                       bdev_nvme_reset_destroy_qpair,
    2183             :                                       NULL,
    2184             :                                       bdev_nvme_reset_create_qpairs_failed);
    2185             :         }
    2186          27 : }
    2187             : 
    2188             : static int
    2189          43 : bdev_nvme_reset_check_qpair_connected(void *ctx)
    2190             : {
    2191          43 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx;
    2192             : 
    2193          43 :         if (ctrlr_ch->reset_iter == NULL) {
    2194             :                 /* qpair was already failed to connect and the reset sequence is being aborted. */
    2195           0 :                 assert(ctrlr_ch->connect_poller == NULL);
    2196           0 :                 assert(ctrlr_ch->qpair->qpair == NULL);
    2197           0 :                 return SPDK_POLLER_BUSY;
    2198             :         }
    2199             : 
    2200          43 :         assert(ctrlr_ch->qpair->qpair != NULL);
    2201             : 
    2202          43 :         if (!spdk_nvme_qpair_is_connected(ctrlr_ch->qpair->qpair)) {
    2203           0 :                 return SPDK_POLLER_BUSY;
    2204             :         }
    2205             : 
    2206          43 :         spdk_poller_unregister(&ctrlr_ch->connect_poller);
    2207             : 
    2208             :         /* qpair was completed to connect. Move to the next ctrlr_channel */
    2209          43 :         spdk_for_each_channel_continue(ctrlr_ch->reset_iter, 0);
    2210          43 :         ctrlr_ch->reset_iter = NULL;
    2211             : 
    2212          43 :         if (!g_opts.disable_auto_failback) {
    2213          30 :                 _bdev_nvme_clear_io_path_cache(ctrlr_ch->qpair);
    2214             :         }
    2215             : 
    2216          43 :         return SPDK_POLLER_BUSY;
    2217             : }
    2218             : 
    2219             : static void
    2220          43 : bdev_nvme_reset_create_qpair(struct spdk_io_channel_iter *i)
    2221             : {
    2222          43 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    2223          43 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(_ch);
    2224             :         int rc;
    2225             : 
    2226          43 :         rc = bdev_nvme_create_qpair(ctrlr_ch->qpair);
    2227          43 :         if (rc == 0) {
    2228          43 :                 ctrlr_ch->connect_poller = SPDK_POLLER_REGISTER(bdev_nvme_reset_check_qpair_connected,
    2229             :                                            ctrlr_ch, 0);
    2230             : 
    2231             :                 /* The current full reset sequence will move to the next
    2232             :                  * ctrlr_channel after the qpair is actually connected.
    2233             :                  */
    2234          43 :                 assert(ctrlr_ch->reset_iter == NULL);
    2235          43 :                 ctrlr_ch->reset_iter = i;
    2236             :         } else {
    2237           0 :                 spdk_for_each_channel_continue(i, rc);
    2238             :         }
    2239          43 : }
    2240             : 
    2241             : static void
    2242          27 : nvme_ctrlr_check_namespaces(struct nvme_ctrlr *nvme_ctrlr)
    2243             : {
    2244          27 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    2245             :         struct nvme_ns *nvme_ns;
    2246             : 
    2247          39 :         for (nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    2248             :              nvme_ns != NULL;
    2249          12 :              nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns)) {
    2250          12 :                 if (!spdk_nvme_ctrlr_is_active_ns(ctrlr, nvme_ns->id)) {
    2251           1 :                         SPDK_DEBUGLOG(bdev_nvme, "NSID %u was removed during reset.\n", nvme_ns->id);
    2252             :                         /* NS can be added again. Just nullify nvme_ns->ns. */
    2253           1 :                         nvme_ns->ns = NULL;
    2254             :                 }
    2255             :         }
    2256          27 : }
    2257             : 
    2258             : 
    2259             : static int
    2260          49 : bdev_nvme_reconnect_ctrlr_poll(void *arg)
    2261             : {
    2262          49 :         struct nvme_ctrlr *nvme_ctrlr = arg;
    2263          49 :         int rc = -ETIMEDOUT;
    2264             : 
    2265          49 :         if (bdev_nvme_check_ctrlr_loss_timeout(nvme_ctrlr)) {
    2266             :                 /* Mark the ctrlr as failed. The next call to
    2267             :                  * spdk_nvme_ctrlr_reconnect_poll_async() will then
    2268             :                  * do the necessary cleanup and return failure.
    2269             :                  */
    2270           2 :                 spdk_nvme_ctrlr_fail(nvme_ctrlr->ctrlr);
    2271             :         }
    2272             : 
    2273          49 :         rc = spdk_nvme_ctrlr_reconnect_poll_async(nvme_ctrlr->ctrlr);
    2274          49 :         if (rc == -EAGAIN) {
    2275           0 :                 return SPDK_POLLER_BUSY;
    2276             :         }
    2277             : 
    2278          49 :         spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
    2279          49 :         if (rc == 0) {
    2280          27 :                 nvme_ctrlr_check_namespaces(nvme_ctrlr);
    2281             : 
    2282             :                 /* Recreate all of the I/O queue pairs */
    2283          27 :                 spdk_for_each_channel(nvme_ctrlr,
    2284             :                                       bdev_nvme_reset_create_qpair,
    2285             :                                       NULL,
    2286             :                                       bdev_nvme_reset_create_qpairs_done);
    2287             :         } else {
    2288          22 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2289             :         }
    2290          49 :         return SPDK_POLLER_BUSY;
    2291             : }
    2292             : 
    2293             : static void
    2294          49 : bdev_nvme_reconnect_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2295             : {
    2296          49 :         spdk_nvme_ctrlr_reconnect_async(nvme_ctrlr->ctrlr);
    2297             : 
    2298             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reconnect, nvme_ctrlr->nbdev_ctrlr->name);
    2299          49 :         assert(nvme_ctrlr->reset_detach_poller == NULL);
    2300          49 :         nvme_ctrlr->reset_detach_poller = SPDK_POLLER_REGISTER(bdev_nvme_reconnect_ctrlr_poll,
    2301             :                                           nvme_ctrlr, 0);
    2302          49 : }
    2303             : 
    2304             : static void
    2305          36 : bdev_nvme_reset_destroy_qpair_done(struct spdk_io_channel_iter *i, int status)
    2306             : {
    2307          36 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    2308             : 
    2309             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reset, nvme_ctrlr->nbdev_ctrlr->name);
    2310          36 :         assert(status == 0);
    2311             : 
    2312          36 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2313           0 :                 bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2314             :         } else {
    2315          36 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reconnect_ctrlr);
    2316             :         }
    2317          36 : }
    2318             : 
    2319             : static void
    2320          36 : bdev_nvme_reset_destroy_qpairs(struct nvme_ctrlr *nvme_ctrlr)
    2321             : {
    2322          36 :         spdk_for_each_channel(nvme_ctrlr,
    2323             :                               bdev_nvme_reset_destroy_qpair,
    2324             :                               NULL,
    2325             :                               bdev_nvme_reset_destroy_qpair_done);
    2326          36 : }
    2327             : 
    2328             : static void
    2329           3 : bdev_nvme_reconnect_ctrlr_now(void *ctx)
    2330             : {
    2331           3 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2332             : 
    2333           3 :         assert(nvme_ctrlr->resetting == true);
    2334           3 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2335             : 
    2336           3 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2337             : 
    2338           3 :         spdk_poller_resume(nvme_ctrlr->adminq_timer_poller);
    2339             : 
    2340           3 :         bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2341           3 : }
    2342             : 
    2343             : static void
    2344          36 : _bdev_nvme_reset_ctrlr(void *ctx)
    2345             : {
    2346          36 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2347             : 
    2348          36 :         assert(nvme_ctrlr->resetting == true);
    2349          36 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2350             : 
    2351          36 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2352           0 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reset_destroy_qpairs);
    2353             :         } else {
    2354          36 :                 bdev_nvme_reset_destroy_qpairs(nvme_ctrlr);
    2355             :         }
    2356          36 : }
    2357             : 
    2358             : static int
    2359          34 : bdev_nvme_reset_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2360             : {
    2361             :         spdk_msg_fn msg_fn;
    2362             : 
    2363          34 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2364          34 :         if (nvme_ctrlr->destruct) {
    2365           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2366           3 :                 return -ENXIO;
    2367             :         }
    2368             : 
    2369          31 :         if (nvme_ctrlr->resetting) {
    2370           6 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2371           6 :                 SPDK_NOTICELOG("Unable to perform reset, already in progress.\n");
    2372           6 :                 return -EBUSY;
    2373             :         }
    2374             : 
    2375          25 :         if (nvme_ctrlr->disabled) {
    2376           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2377           0 :                 SPDK_NOTICELOG("Unable to perform reset. Controller is disabled.\n");
    2378           0 :                 return -EALREADY;
    2379             :         }
    2380             : 
    2381          25 :         nvme_ctrlr->resetting = true;
    2382          25 :         nvme_ctrlr->dont_retry = true;
    2383             : 
    2384          25 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2385           1 :                 SPDK_DEBUGLOG(bdev_nvme, "Reconnect is already scheduled.\n");
    2386           1 :                 msg_fn = bdev_nvme_reconnect_ctrlr_now;
    2387           1 :                 nvme_ctrlr->reconnect_is_delayed = false;
    2388             :         } else {
    2389          24 :                 msg_fn = _bdev_nvme_reset_ctrlr;
    2390          24 :                 assert(nvme_ctrlr->reset_start_tsc == 0);
    2391             :         }
    2392             : 
    2393          25 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2394             : 
    2395          25 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2396             : 
    2397          25 :         spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    2398          25 :         return 0;
    2399             : }
    2400             : 
    2401             : static int
    2402           3 : bdev_nvme_enable_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2403             : {
    2404           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2405           3 :         if (nvme_ctrlr->destruct) {
    2406           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2407           0 :                 return -ENXIO;
    2408             :         }
    2409             : 
    2410           3 :         if (nvme_ctrlr->resetting) {
    2411           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2412           0 :                 return -EBUSY;
    2413             :         }
    2414             : 
    2415           3 :         if (!nvme_ctrlr->disabled) {
    2416           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2417           1 :                 return -EALREADY;
    2418             :         }
    2419             : 
    2420           2 :         nvme_ctrlr->disabled = false;
    2421           2 :         nvme_ctrlr->resetting = true;
    2422             : 
    2423           2 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2424             : 
    2425           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2426             : 
    2427           2 :         spdk_thread_send_msg(nvme_ctrlr->thread, bdev_nvme_reconnect_ctrlr_now, nvme_ctrlr);
    2428           2 :         return 0;
    2429             : }
    2430             : 
    2431             : static void
    2432           2 : _bdev_nvme_disable_ctrlr_complete(struct spdk_io_channel_iter *i, int status)
    2433             : {
    2434           2 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    2435           2 :         bdev_nvme_ctrlr_op_cb ctrlr_op_cb_fn = nvme_ctrlr->ctrlr_op_cb_fn;
    2436           2 :         void *ctrlr_op_cb_arg = nvme_ctrlr->ctrlr_op_cb_arg;
    2437             :         enum bdev_nvme_op_after_reset op_after_disable;
    2438             : 
    2439           2 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2440             : 
    2441           2 :         nvme_ctrlr->ctrlr_op_cb_fn = NULL;
    2442           2 :         nvme_ctrlr->ctrlr_op_cb_arg = NULL;
    2443             : 
    2444           2 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2445             : 
    2446           2 :         nvme_ctrlr->resetting = false;
    2447           2 :         nvme_ctrlr->dont_retry = false;
    2448             : 
    2449           2 :         op_after_disable = bdev_nvme_check_op_after_reset(nvme_ctrlr, true);
    2450             : 
    2451           2 :         nvme_ctrlr->disabled = true;
    2452           2 :         spdk_poller_pause(nvme_ctrlr->adminq_timer_poller);
    2453             : 
    2454           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2455             : 
    2456           2 :         if (ctrlr_op_cb_fn) {
    2457           0 :                 ctrlr_op_cb_fn(ctrlr_op_cb_arg, 0);
    2458             :         }
    2459             : 
    2460           2 :         switch (op_after_disable) {
    2461           0 :         case OP_COMPLETE_PENDING_DESTRUCT:
    2462           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    2463           0 :                 break;
    2464           2 :         default:
    2465           2 :                 break;
    2466             :         }
    2467             : 
    2468           2 : }
    2469             : 
    2470             : static void
    2471           2 : bdev_nvme_disable_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr)
    2472             : {
    2473             :         /* Make sure we clear any pending resets before returning. */
    2474           2 :         spdk_for_each_channel(nvme_ctrlr,
    2475             :                               bdev_nvme_complete_pending_resets,
    2476             :                               NULL,
    2477             :                               _bdev_nvme_disable_ctrlr_complete);
    2478           2 : }
    2479             : 
    2480             : static void
    2481           1 : bdev_nvme_disable_destroy_qpairs_done(struct spdk_io_channel_iter *i, int status)
    2482             : {
    2483           1 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
    2484             : 
    2485           1 :         assert(status == 0);
    2486             : 
    2487           1 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2488           0 :                 bdev_nvme_disable_ctrlr_complete(nvme_ctrlr);
    2489             :         } else {
    2490           1 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_disable_ctrlr_complete);
    2491             :         }
    2492           1 : }
    2493             : 
    2494             : static void
    2495           1 : bdev_nvme_disable_destroy_qpairs(struct nvme_ctrlr *nvme_ctrlr)
    2496             : {
    2497           1 :         spdk_for_each_channel(nvme_ctrlr,
    2498             :                               bdev_nvme_reset_destroy_qpair,
    2499             :                               NULL,
    2500             :                               bdev_nvme_disable_destroy_qpairs_done);
    2501           1 : }
    2502             : 
    2503             : static void
    2504           1 : _bdev_nvme_cancel_reconnect_and_disable_ctrlr(void *ctx)
    2505             : {
    2506           1 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2507             : 
    2508           1 :         assert(nvme_ctrlr->resetting == true);
    2509           1 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2510             : 
    2511           1 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2512             : 
    2513           1 :         bdev_nvme_disable_ctrlr_complete(nvme_ctrlr);
    2514           1 : }
    2515             : 
    2516             : static void
    2517           1 : _bdev_nvme_disconnect_and_disable_ctrlr(void *ctx)
    2518             : {
    2519           1 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2520             : 
    2521           1 :         assert(nvme_ctrlr->resetting == true);
    2522           1 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2523             : 
    2524           1 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2525           0 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_disable_destroy_qpairs);
    2526             :         } else {
    2527           1 :                 bdev_nvme_disable_destroy_qpairs(nvme_ctrlr);
    2528             :         }
    2529           1 : }
    2530             : 
    2531             : static int
    2532           5 : bdev_nvme_disable_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2533             : {
    2534             :         spdk_msg_fn msg_fn;
    2535             : 
    2536           5 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2537           5 :         if (nvme_ctrlr->destruct) {
    2538           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2539           1 :                 return -ENXIO;
    2540             :         }
    2541             : 
    2542           4 :         if (nvme_ctrlr->resetting) {
    2543           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2544           1 :                 return -EBUSY;
    2545             :         }
    2546             : 
    2547           3 :         if (nvme_ctrlr->disabled) {
    2548           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2549           1 :                 return -EALREADY;
    2550             :         }
    2551             : 
    2552           2 :         nvme_ctrlr->resetting = true;
    2553           2 :         nvme_ctrlr->dont_retry = true;
    2554             : 
    2555           2 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2556           1 :                 msg_fn = _bdev_nvme_cancel_reconnect_and_disable_ctrlr;
    2557           1 :                 nvme_ctrlr->reconnect_is_delayed = false;
    2558             :         } else {
    2559           1 :                 msg_fn = _bdev_nvme_disconnect_and_disable_ctrlr;
    2560             :         }
    2561             : 
    2562           2 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2563             : 
    2564           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2565             : 
    2566           2 :         spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    2567           2 :         return 0;
    2568             : }
    2569             : 
    2570             : static int
    2571          16 : nvme_ctrlr_op(struct nvme_ctrlr *nvme_ctrlr, enum nvme_ctrlr_op op,
    2572             :               bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2573             : {
    2574             :         int rc;
    2575             : 
    2576          16 :         switch (op) {
    2577          15 :         case NVME_CTRLR_OP_RESET:
    2578          15 :                 rc = bdev_nvme_reset_ctrlr(nvme_ctrlr);
    2579          15 :                 break;
    2580           0 :         case NVME_CTRLR_OP_ENABLE:
    2581           0 :                 rc = bdev_nvme_enable_ctrlr(nvme_ctrlr);
    2582           0 :                 break;
    2583           0 :         case NVME_CTRLR_OP_DISABLE:
    2584           0 :                 rc = bdev_nvme_disable_ctrlr(nvme_ctrlr);
    2585           0 :                 break;
    2586           1 :         default:
    2587           1 :                 rc = -EINVAL;
    2588           1 :                 break;
    2589             :         }
    2590             : 
    2591          16 :         if (rc == 0) {
    2592           9 :                 assert(nvme_ctrlr->ctrlr_op_cb_fn == NULL);
    2593           9 :                 assert(nvme_ctrlr->ctrlr_op_cb_arg == NULL);
    2594           9 :                 nvme_ctrlr->ctrlr_op_cb_fn = cb_fn;
    2595           9 :                 nvme_ctrlr->ctrlr_op_cb_arg = cb_arg;
    2596             :         }
    2597          16 :         return rc;
    2598             : }
    2599             : 
    2600             : struct nvme_ctrlr_op_rpc_ctx {
    2601             :         struct nvme_ctrlr *nvme_ctrlr;
    2602             :         struct spdk_thread *orig_thread;
    2603             :         enum nvme_ctrlr_op op;
    2604             :         int rc;
    2605             :         bdev_nvme_ctrlr_op_cb cb_fn;
    2606             :         void *cb_arg;
    2607             : };
    2608             : 
    2609             : static void
    2610           4 : _nvme_ctrlr_op_rpc_complete(void *_ctx)
    2611             : {
    2612           4 :         struct nvme_ctrlr_op_rpc_ctx *ctx = _ctx;
    2613             : 
    2614           4 :         assert(ctx != NULL);
    2615           4 :         assert(ctx->cb_fn != NULL);
    2616             : 
    2617           4 :         ctx->cb_fn(ctx->cb_arg, ctx->rc);
    2618             : 
    2619           4 :         free(ctx);
    2620           4 : }
    2621             : 
    2622             : static void
    2623           4 : nvme_ctrlr_op_rpc_complete(void *cb_arg, int rc)
    2624             : {
    2625           4 :         struct nvme_ctrlr_op_rpc_ctx *ctx = cb_arg;
    2626             : 
    2627           4 :         ctx->rc = rc;
    2628             : 
    2629           4 :         spdk_thread_send_msg(ctx->orig_thread, _nvme_ctrlr_op_rpc_complete, ctx);
    2630           4 : }
    2631             : 
    2632             : void
    2633           4 : nvme_ctrlr_op_rpc(struct nvme_ctrlr *nvme_ctrlr, enum nvme_ctrlr_op op,
    2634             :                   bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2635             : {
    2636             :         struct nvme_ctrlr_op_rpc_ctx *ctx;
    2637             :         int rc;
    2638             : 
    2639           4 :         assert(cb_fn != NULL);
    2640             : 
    2641           4 :         ctx = calloc(1, sizeof(*ctx));
    2642           4 :         if (ctx == NULL) {
    2643           0 :                 SPDK_ERRLOG("Failed to allocate nvme_ctrlr_op_rpc_ctx.\n");
    2644           0 :                 cb_fn(cb_arg, -ENOMEM);
    2645           0 :                 return;
    2646             :         }
    2647             : 
    2648           4 :         ctx->orig_thread = spdk_get_thread();
    2649           4 :         ctx->cb_fn = cb_fn;
    2650           4 :         ctx->cb_arg = cb_arg;
    2651             : 
    2652           4 :         rc = nvme_ctrlr_op(nvme_ctrlr, op, nvme_ctrlr_op_rpc_complete, ctx);
    2653           4 :         if (rc == 0) {
    2654           1 :                 return;
    2655           3 :         } else if (rc == -EALREADY) {
    2656           0 :                 rc = 0;
    2657             :         }
    2658             : 
    2659           3 :         nvme_ctrlr_op_rpc_complete(ctx, rc);
    2660             : }
    2661             : 
    2662             : static void nvme_bdev_ctrlr_op_rpc_continue(void *cb_arg, int rc);
    2663             : 
    2664             : static void
    2665           2 : _nvme_bdev_ctrlr_op_rpc_continue(void *_ctx)
    2666             : {
    2667           2 :         struct nvme_ctrlr_op_rpc_ctx *ctx = _ctx;
    2668             :         struct nvme_ctrlr *prev_nvme_ctrlr, *next_nvme_ctrlr;
    2669             :         int rc;
    2670             : 
    2671           2 :         prev_nvme_ctrlr = ctx->nvme_ctrlr;
    2672           2 :         ctx->nvme_ctrlr = NULL;
    2673             : 
    2674           2 :         if (ctx->rc != 0) {
    2675           0 :                 goto complete;
    2676             :         }
    2677             : 
    2678           2 :         next_nvme_ctrlr = TAILQ_NEXT(prev_nvme_ctrlr, tailq);
    2679           2 :         if (next_nvme_ctrlr == NULL) {
    2680           1 :                 goto complete;
    2681             :         }
    2682             : 
    2683           1 :         rc = nvme_ctrlr_op(next_nvme_ctrlr, ctx->op, nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2684           1 :         if (rc == 0) {
    2685           1 :                 ctx->nvme_ctrlr = next_nvme_ctrlr;
    2686           1 :                 return;
    2687           0 :         } else if (rc == -EALREADY) {
    2688           0 :                 ctx->nvme_ctrlr = next_nvme_ctrlr;
    2689           0 :                 rc = 0;
    2690             :         }
    2691             : 
    2692           0 :         ctx->rc = rc;
    2693             : 
    2694           1 : complete:
    2695           1 :         ctx->cb_fn(ctx->cb_arg, ctx->rc);
    2696           1 :         free(ctx);
    2697             : }
    2698             : 
    2699             : static void
    2700           2 : nvme_bdev_ctrlr_op_rpc_continue(void *cb_arg, int rc)
    2701             : {
    2702           2 :         struct nvme_ctrlr_op_rpc_ctx *ctx = cb_arg;
    2703             : 
    2704           2 :         ctx->rc = rc;
    2705             : 
    2706           2 :         spdk_thread_send_msg(ctx->orig_thread, _nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2707           2 : }
    2708             : 
    2709             : void
    2710           1 : nvme_bdev_ctrlr_op_rpc(struct nvme_bdev_ctrlr *nbdev_ctrlr, enum nvme_ctrlr_op op,
    2711             :                        bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2712             : {
    2713             :         struct nvme_ctrlr_op_rpc_ctx *ctx;
    2714             :         struct nvme_ctrlr *nvme_ctrlr;
    2715             :         int rc;
    2716             : 
    2717           1 :         assert(cb_fn != NULL);
    2718             : 
    2719           1 :         ctx = calloc(1, sizeof(*ctx));
    2720           1 :         if (ctx == NULL) {
    2721           0 :                 SPDK_ERRLOG("Failed to allocate nvme_ctrlr_op_rpc_ctx.\n");
    2722           0 :                 cb_fn(cb_arg, -ENOMEM);
    2723           0 :                 return;
    2724             :         }
    2725             : 
    2726           1 :         ctx->orig_thread = spdk_get_thread();
    2727           1 :         ctx->op = op;
    2728           1 :         ctx->cb_fn = cb_fn;
    2729           1 :         ctx->cb_arg = cb_arg;
    2730             : 
    2731           1 :         nvme_ctrlr = TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
    2732           1 :         assert(nvme_ctrlr != NULL);
    2733             : 
    2734           1 :         rc = nvme_ctrlr_op(nvme_ctrlr, op, nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2735           1 :         if (rc == 0) {
    2736           1 :                 ctx->nvme_ctrlr = nvme_ctrlr;
    2737           1 :                 return;
    2738           0 :         } else if (rc == -EALREADY) {
    2739           0 :                 ctx->nvme_ctrlr = nvme_ctrlr;
    2740           0 :                 rc = 0;
    2741             :         }
    2742             : 
    2743           0 :         nvme_bdev_ctrlr_op_rpc_continue(ctx, rc);
    2744             : }
    2745             : 
    2746             : static int _bdev_nvme_reset_io(struct nvme_io_path *io_path, struct nvme_bdev_io *bio);
    2747             : 
    2748             : static void
    2749           7 : _bdev_nvme_reset_io_complete(struct spdk_io_channel_iter *i, int status)
    2750             : {
    2751           7 :         struct nvme_bdev_io *bio = spdk_io_channel_iter_get_ctx(i);
    2752             :         enum spdk_bdev_io_status io_status;
    2753             : 
    2754           7 :         if (bio->cpl.cdw0 == 0) {
    2755           5 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    2756             :         } else {
    2757           2 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    2758             :         }
    2759             : 
    2760           7 :         __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), io_status, NULL);
    2761           7 : }
    2762             : 
    2763             : static void
    2764          14 : bdev_nvme_abort_bdev_channel(struct spdk_io_channel_iter *i)
    2765             : {
    2766          14 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    2767          14 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(_ch);
    2768             : 
    2769          14 :         bdev_nvme_abort_retry_ios(nbdev_ch);
    2770             : 
    2771          14 :         spdk_for_each_channel_continue(i, 0);
    2772          14 : }
    2773             : 
    2774             : static void
    2775           7 : bdev_nvme_reset_io_complete(struct nvme_bdev_io *bio)
    2776             : {
    2777           7 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    2778           7 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    2779             : 
    2780             :         /* Abort all queued I/Os for retry. */
    2781           7 :         spdk_for_each_channel(nbdev,
    2782             :                               bdev_nvme_abort_bdev_channel,
    2783             :                               bio,
    2784             :                               _bdev_nvme_reset_io_complete);
    2785           7 : }
    2786             : 
    2787             : static void
    2788          10 : _bdev_nvme_reset_io_continue(void *ctx)
    2789             : {
    2790          10 :         struct nvme_bdev_io *bio = ctx;
    2791             :         struct nvme_io_path *prev_io_path, *next_io_path;
    2792             :         int rc;
    2793             : 
    2794          10 :         prev_io_path = bio->io_path;
    2795          10 :         bio->io_path = NULL;
    2796             : 
    2797          10 :         if (bio->cpl.cdw0 != 0) {
    2798           2 :                 goto complete;
    2799             :         }
    2800             : 
    2801           8 :         next_io_path = STAILQ_NEXT(prev_io_path, stailq);
    2802           8 :         if (next_io_path == NULL) {
    2803           5 :                 goto complete;
    2804             :         }
    2805             : 
    2806           3 :         rc = _bdev_nvme_reset_io(next_io_path, bio);
    2807           3 :         if (rc == 0) {
    2808           3 :                 return;
    2809             :         }
    2810             : 
    2811           0 :         bio->cpl.cdw0 = 1;
    2812             : 
    2813           7 : complete:
    2814           7 :         bdev_nvme_reset_io_complete(bio);
    2815             : }
    2816             : 
    2817             : static void
    2818          10 : bdev_nvme_reset_io_continue(void *cb_arg, int rc)
    2819             : {
    2820          10 :         struct nvme_bdev_io *bio = cb_arg;
    2821          10 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    2822             : 
    2823          10 :         bio->cpl.cdw0 = (rc == 0) ? 0 : 1;
    2824             : 
    2825          10 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io), _bdev_nvme_reset_io_continue, bio);
    2826          10 : }
    2827             : 
    2828             : static int
    2829          10 : _bdev_nvme_reset_io(struct nvme_io_path *io_path, struct nvme_bdev_io *bio)
    2830             : {
    2831             :         struct nvme_ctrlr_channel *ctrlr_ch;
    2832             :         struct spdk_bdev_io *bdev_io;
    2833             :         int rc;
    2834             : 
    2835          10 :         rc = nvme_ctrlr_op(io_path->qpair->ctrlr, NVME_CTRLR_OP_RESET,
    2836             :                            bdev_nvme_reset_io_continue, bio);
    2837          10 :         if (rc != 0 && rc != -EBUSY) {
    2838           0 :                 return rc;
    2839             :         }
    2840             : 
    2841          10 :         assert(bio->io_path == NULL);
    2842          10 :         bio->io_path = io_path;
    2843             : 
    2844          10 :         if (rc == -EBUSY) {
    2845           4 :                 ctrlr_ch = io_path->qpair->ctrlr_ch;
    2846           4 :                 assert(ctrlr_ch != NULL);
    2847             :                 /*
    2848             :                  * Reset call is queued only if it is from the app framework. This is on purpose so that
    2849             :                  * we don't interfere with the app framework reset strategy. i.e. we are deferring to the
    2850             :                  * upper level. If they are in the middle of a reset, we won't try to schedule another one.
    2851             :                  */
    2852           4 :                 bdev_io = spdk_bdev_io_from_ctx(bio);
    2853           4 :                 TAILQ_INSERT_TAIL(&ctrlr_ch->pending_resets, bdev_io, module_link);
    2854             :         }
    2855             : 
    2856          10 :         return 0;
    2857             : }
    2858             : 
    2859             : static void
    2860           7 : bdev_nvme_reset_io(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio)
    2861             : {
    2862             :         struct nvme_io_path *io_path;
    2863             :         int rc;
    2864             : 
    2865           7 :         bio->cpl.cdw0 = 0;
    2866             : 
    2867             :         /* Reset all nvme_ctrlrs of a bdev controller sequentially. */
    2868           7 :         io_path = STAILQ_FIRST(&nbdev_ch->io_path_list);
    2869           7 :         assert(io_path != NULL);
    2870             : 
    2871           7 :         rc = _bdev_nvme_reset_io(io_path, bio);
    2872           7 :         if (rc != 0) {
    2873             :                 /* If the current nvme_ctrlr is disabled, skip it and move to the next nvme_ctrlr. */
    2874           0 :                 rc = (rc == -EALREADY) ? 0 : rc;
    2875             : 
    2876           0 :                 bdev_nvme_reset_io_continue(bio, rc);
    2877             :         }
    2878           7 : }
    2879             : 
    2880             : static int
    2881          18 : bdev_nvme_failover_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool remove)
    2882             : {
    2883          18 :         if (nvme_ctrlr->destruct) {
    2884             :                 /* Don't bother resetting if the controller is in the process of being destructed. */
    2885           2 :                 return -ENXIO;
    2886             :         }
    2887             : 
    2888          16 :         if (nvme_ctrlr->resetting) {
    2889           3 :                 if (!nvme_ctrlr->in_failover) {
    2890           3 :                         SPDK_NOTICELOG("Reset is already in progress. Defer failover until reset completes.\n");
    2891             : 
    2892             :                         /* Defer failover until reset completes. */
    2893           3 :                         nvme_ctrlr->pending_failover = true;
    2894           3 :                         return -EINPROGRESS;
    2895             :                 } else {
    2896           0 :                         SPDK_NOTICELOG("Unable to perform failover, already in progress.\n");
    2897           0 :                         return -EBUSY;
    2898             :                 }
    2899             :         }
    2900             : 
    2901          13 :         bdev_nvme_failover_trid(nvme_ctrlr, remove, true);
    2902             : 
    2903          13 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2904           1 :                 SPDK_NOTICELOG("Reconnect is already scheduled.\n");
    2905             : 
    2906             :                 /* We rely on the next reconnect for the failover. */
    2907           1 :                 return -EALREADY;
    2908             :         }
    2909             : 
    2910          12 :         if (nvme_ctrlr->disabled) {
    2911           0 :                 SPDK_NOTICELOG("Controller is disabled.\n");
    2912             : 
    2913             :                 /* We rely on the enablement for the failover. */
    2914           0 :                 return -EALREADY;
    2915             :         }
    2916             : 
    2917          12 :         nvme_ctrlr->resetting = true;
    2918          12 :         nvme_ctrlr->in_failover = true;
    2919             : 
    2920          12 :         assert(nvme_ctrlr->reset_start_tsc == 0);
    2921          12 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2922             : 
    2923          12 :         return 0;
    2924             : }
    2925             : 
    2926             : static int
    2927          16 : bdev_nvme_failover_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2928             : {
    2929             :         int rc;
    2930             : 
    2931          16 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2932          16 :         rc = bdev_nvme_failover_ctrlr_unsafe(nvme_ctrlr, false);
    2933          16 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2934             : 
    2935          16 :         if (rc == 0) {
    2936          11 :                 spdk_thread_send_msg(nvme_ctrlr->thread, _bdev_nvme_reset_ctrlr, nvme_ctrlr);
    2937           5 :         } else if (rc == -EALREADY) {
    2938           0 :                 rc = 0;
    2939             :         }
    2940             : 
    2941          16 :         return rc;
    2942             : }
    2943             : 
    2944             : static int bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks,
    2945             :                            uint64_t num_blocks);
    2946             : 
    2947             : static int bdev_nvme_write_zeroes(struct nvme_bdev_io *bio, uint64_t offset_blocks,
    2948             :                                   uint64_t num_blocks);
    2949             : 
    2950             : static int bdev_nvme_copy(struct nvme_bdev_io *bio, uint64_t dst_offset_blocks,
    2951             :                           uint64_t src_offset_blocks,
    2952             :                           uint64_t num_blocks);
    2953             : 
    2954             : static void
    2955           1 : bdev_nvme_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    2956             :                      bool success)
    2957             : {
    2958           1 :         struct nvme_bdev_io *bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    2959             :         int ret;
    2960             : 
    2961           1 :         if (!success) {
    2962           0 :                 ret = -EINVAL;
    2963           0 :                 goto exit;
    2964             :         }
    2965             : 
    2966           1 :         if (spdk_unlikely(!nvme_io_path_is_available(bio->io_path))) {
    2967           0 :                 ret = -ENXIO;
    2968           0 :                 goto exit;
    2969             :         }
    2970             : 
    2971           1 :         ret = bdev_nvme_readv(bio,
    2972             :                               bdev_io->u.bdev.iovs,
    2973             :                               bdev_io->u.bdev.iovcnt,
    2974             :                               bdev_io->u.bdev.md_buf,
    2975             :                               bdev_io->u.bdev.num_blocks,
    2976             :                               bdev_io->u.bdev.offset_blocks,
    2977             :                               bdev_io->u.bdev.dif_check_flags,
    2978             :                               bdev_io->u.bdev.memory_domain,
    2979             :                               bdev_io->u.bdev.memory_domain_ctx,
    2980             :                               bdev_io->u.bdev.accel_sequence);
    2981             : 
    2982           1 : exit:
    2983           1 :         if (spdk_unlikely(ret != 0)) {
    2984           0 :                 bdev_nvme_io_complete(bio, ret);
    2985             :         }
    2986           1 : }
    2987             : 
    2988             : static inline void
    2989          51 : _bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
    2990             : {
    2991          51 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    2992          51 :         struct spdk_bdev *bdev = bdev_io->bdev;
    2993             :         struct nvme_bdev_io *nbdev_io_to_abort;
    2994          51 :         int rc = 0;
    2995             : 
    2996          51 :         switch (bdev_io->type) {
    2997           3 :         case SPDK_BDEV_IO_TYPE_READ:
    2998           3 :                 if (bdev_io->u.bdev.iovs && bdev_io->u.bdev.iovs[0].iov_base) {
    2999             : 
    3000           2 :                         rc = bdev_nvme_readv(nbdev_io,
    3001             :                                              bdev_io->u.bdev.iovs,
    3002             :                                              bdev_io->u.bdev.iovcnt,
    3003             :                                              bdev_io->u.bdev.md_buf,
    3004             :                                              bdev_io->u.bdev.num_blocks,
    3005             :                                              bdev_io->u.bdev.offset_blocks,
    3006             :                                              bdev_io->u.bdev.dif_check_flags,
    3007             :                                              bdev_io->u.bdev.memory_domain,
    3008             :                                              bdev_io->u.bdev.memory_domain_ctx,
    3009             :                                              bdev_io->u.bdev.accel_sequence);
    3010             :                 } else {
    3011           1 :                         spdk_bdev_io_get_buf(bdev_io, bdev_nvme_get_buf_cb,
    3012           1 :                                              bdev_io->u.bdev.num_blocks * bdev->blocklen);
    3013           1 :                         rc = 0;
    3014             :                 }
    3015           3 :                 break;
    3016          25 :         case SPDK_BDEV_IO_TYPE_WRITE:
    3017          25 :                 rc = bdev_nvme_writev(nbdev_io,
    3018             :                                       bdev_io->u.bdev.iovs,
    3019             :                                       bdev_io->u.bdev.iovcnt,
    3020             :                                       bdev_io->u.bdev.md_buf,
    3021             :                                       bdev_io->u.bdev.num_blocks,
    3022             :                                       bdev_io->u.bdev.offset_blocks,
    3023             :                                       bdev_io->u.bdev.dif_check_flags,
    3024             :                                       bdev_io->u.bdev.memory_domain,
    3025             :                                       bdev_io->u.bdev.memory_domain_ctx,
    3026             :                                       bdev_io->u.bdev.accel_sequence,
    3027             :                                       bdev_io->u.bdev.nvme_cdw12,
    3028             :                                       bdev_io->u.bdev.nvme_cdw13);
    3029          25 :                 break;
    3030           1 :         case SPDK_BDEV_IO_TYPE_COMPARE:
    3031           1 :                 rc = bdev_nvme_comparev(nbdev_io,
    3032             :                                         bdev_io->u.bdev.iovs,
    3033             :                                         bdev_io->u.bdev.iovcnt,
    3034             :                                         bdev_io->u.bdev.md_buf,
    3035             :                                         bdev_io->u.bdev.num_blocks,
    3036             :                                         bdev_io->u.bdev.offset_blocks,
    3037             :                                         bdev_io->u.bdev.dif_check_flags);
    3038           1 :                 break;
    3039           2 :         case SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE:
    3040           2 :                 rc = bdev_nvme_comparev_and_writev(nbdev_io,
    3041             :                                                    bdev_io->u.bdev.iovs,
    3042             :                                                    bdev_io->u.bdev.iovcnt,
    3043             :                                                    bdev_io->u.bdev.fused_iovs,
    3044             :                                                    bdev_io->u.bdev.fused_iovcnt,
    3045             :                                                    bdev_io->u.bdev.md_buf,
    3046             :                                                    bdev_io->u.bdev.num_blocks,
    3047             :                                                    bdev_io->u.bdev.offset_blocks,
    3048             :                                                    bdev_io->u.bdev.dif_check_flags);
    3049           2 :                 break;
    3050           1 :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3051           1 :                 rc = bdev_nvme_unmap(nbdev_io,
    3052             :                                      bdev_io->u.bdev.offset_blocks,
    3053             :                                      bdev_io->u.bdev.num_blocks);
    3054           1 :                 break;
    3055           0 :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3056           0 :                 rc =  bdev_nvme_write_zeroes(nbdev_io,
    3057             :                                              bdev_io->u.bdev.offset_blocks,
    3058             :                                              bdev_io->u.bdev.num_blocks);
    3059           0 :                 break;
    3060           7 :         case SPDK_BDEV_IO_TYPE_RESET:
    3061           7 :                 nbdev_io->io_path = NULL;
    3062           7 :                 bdev_nvme_reset_io(nbdev_ch, nbdev_io);
    3063           7 :                 return;
    3064             : 
    3065           1 :         case SPDK_BDEV_IO_TYPE_FLUSH:
    3066           1 :                 bdev_nvme_io_complete(nbdev_io, 0);
    3067           1 :                 return;
    3068             : 
    3069           0 :         case SPDK_BDEV_IO_TYPE_ZONE_APPEND:
    3070           0 :                 rc = bdev_nvme_zone_appendv(nbdev_io,
    3071             :                                             bdev_io->u.bdev.iovs,
    3072             :                                             bdev_io->u.bdev.iovcnt,
    3073             :                                             bdev_io->u.bdev.md_buf,
    3074             :                                             bdev_io->u.bdev.num_blocks,
    3075             :                                             bdev_io->u.bdev.offset_blocks,
    3076             :                                             bdev_io->u.bdev.dif_check_flags);
    3077           0 :                 break;
    3078           0 :         case SPDK_BDEV_IO_TYPE_GET_ZONE_INFO:
    3079           0 :                 rc = bdev_nvme_get_zone_info(nbdev_io,
    3080             :                                              bdev_io->u.zone_mgmt.zone_id,
    3081             :                                              bdev_io->u.zone_mgmt.num_zones,
    3082           0 :                                              bdev_io->u.zone_mgmt.buf);
    3083           0 :                 break;
    3084           0 :         case SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT:
    3085           0 :                 rc = bdev_nvme_zone_management(nbdev_io,
    3086             :                                                bdev_io->u.zone_mgmt.zone_id,
    3087             :                                                bdev_io->u.zone_mgmt.zone_action);
    3088           0 :                 break;
    3089           5 :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3090           5 :                 nbdev_io->io_path = NULL;
    3091           5 :                 bdev_nvme_admin_passthru(nbdev_ch,
    3092             :                                          nbdev_io,
    3093             :                                          &bdev_io->u.nvme_passthru.cmd,
    3094             :                                          bdev_io->u.nvme_passthru.buf,
    3095             :                                          bdev_io->u.nvme_passthru.nbytes);
    3096           5 :                 return;
    3097             : 
    3098           0 :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3099           0 :                 rc = bdev_nvme_io_passthru(nbdev_io,
    3100             :                                            &bdev_io->u.nvme_passthru.cmd,
    3101             :                                            bdev_io->u.nvme_passthru.buf,
    3102             :                                            bdev_io->u.nvme_passthru.nbytes);
    3103           0 :                 break;
    3104           0 :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3105           0 :                 rc = bdev_nvme_io_passthru_md(nbdev_io,
    3106             :                                               &bdev_io->u.nvme_passthru.cmd,
    3107             :                                               bdev_io->u.nvme_passthru.buf,
    3108             :                                               bdev_io->u.nvme_passthru.nbytes,
    3109             :                                               bdev_io->u.nvme_passthru.md_buf,
    3110             :                                               bdev_io->u.nvme_passthru.md_len);
    3111           0 :                 break;
    3112           0 :         case SPDK_BDEV_IO_TYPE_NVME_IOV_MD:
    3113           0 :                 rc = bdev_nvme_iov_passthru_md(nbdev_io,
    3114             :                                                &bdev_io->u.nvme_passthru.cmd,
    3115             :                                                bdev_io->u.nvme_passthru.iovs,
    3116             :                                                bdev_io->u.nvme_passthru.iovcnt,
    3117             :                                                bdev_io->u.nvme_passthru.nbytes,
    3118             :                                                bdev_io->u.nvme_passthru.md_buf,
    3119             :                                                bdev_io->u.nvme_passthru.md_len);
    3120           0 :                 break;
    3121           6 :         case SPDK_BDEV_IO_TYPE_ABORT:
    3122           6 :                 nbdev_io->io_path = NULL;
    3123           6 :                 nbdev_io_to_abort = (struct nvme_bdev_io *)bdev_io->u.abort.bio_to_abort->driver_ctx;
    3124           6 :                 bdev_nvme_abort(nbdev_ch,
    3125             :                                 nbdev_io,
    3126             :                                 nbdev_io_to_abort);
    3127           6 :                 return;
    3128             : 
    3129           0 :         case SPDK_BDEV_IO_TYPE_COPY:
    3130           0 :                 rc = bdev_nvme_copy(nbdev_io,
    3131             :                                     bdev_io->u.bdev.offset_blocks,
    3132             :                                     bdev_io->u.bdev.copy.src_offset_blocks,
    3133             :                                     bdev_io->u.bdev.num_blocks);
    3134           0 :                 break;
    3135           0 :         default:
    3136           0 :                 rc = -EINVAL;
    3137           0 :                 break;
    3138             :         }
    3139             : 
    3140          32 :         if (spdk_unlikely(rc != 0)) {
    3141           0 :                 bdev_nvme_io_complete(nbdev_io, rc);
    3142             :         }
    3143             : }
    3144             : 
    3145             : static void
    3146          58 : bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
    3147             : {
    3148          58 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
    3149          58 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3150             : 
    3151          58 :         if (spdk_likely(nbdev_io->submit_tsc == 0)) {
    3152          58 :                 nbdev_io->submit_tsc = spdk_bdev_io_get_submit_tsc(bdev_io);
    3153             :         } else {
    3154             :                 /* There are cases where submit_tsc != 0, i.e. retry I/O.
    3155             :                  * We need to update submit_tsc here.
    3156             :                  */
    3157           0 :                 nbdev_io->submit_tsc = spdk_get_ticks();
    3158             :         }
    3159             : 
    3160          58 :         spdk_trace_record(TRACE_BDEV_NVME_IO_START, 0, 0, (uintptr_t)nbdev_io, (uintptr_t)bdev_io);
    3161          58 :         nbdev_io->io_path = bdev_nvme_find_io_path(nbdev_ch);
    3162          58 :         if (spdk_unlikely(!nbdev_io->io_path)) {
    3163          11 :                 if (!bdev_nvme_io_type_is_admin(bdev_io->type)) {
    3164          10 :                         bdev_nvme_io_complete(nbdev_io, -ENXIO);
    3165          10 :                         return;
    3166             :                 }
    3167             : 
    3168             :                 /* Admin commands do not use the optimal I/O path.
    3169             :                  * Simply fall through even if it is not found.
    3170             :                  */
    3171             :         }
    3172             : 
    3173          48 :         _bdev_nvme_submit_request(nbdev_ch, bdev_io);
    3174             : }
    3175             : 
    3176             : static bool
    3177           0 : bdev_nvme_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
    3178             : {
    3179           0 :         struct nvme_bdev *nbdev = ctx;
    3180             :         struct nvme_ns *nvme_ns;
    3181             :         struct spdk_nvme_ns *ns;
    3182             :         struct spdk_nvme_ctrlr *ctrlr;
    3183             :         const struct spdk_nvme_ctrlr_data *cdata;
    3184             : 
    3185           0 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    3186           0 :         assert(nvme_ns != NULL);
    3187           0 :         ns = nvme_ns->ns;
    3188           0 :         if (ns == NULL) {
    3189           0 :                 return false;
    3190             :         }
    3191             : 
    3192           0 :         ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    3193             : 
    3194           0 :         switch (io_type) {
    3195           0 :         case SPDK_BDEV_IO_TYPE_READ:
    3196             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3197             :         case SPDK_BDEV_IO_TYPE_RESET:
    3198             :         case SPDK_BDEV_IO_TYPE_FLUSH:
    3199             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3200             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3201             :         case SPDK_BDEV_IO_TYPE_ABORT:
    3202           0 :                 return true;
    3203             : 
    3204           0 :         case SPDK_BDEV_IO_TYPE_COMPARE:
    3205           0 :                 return spdk_nvme_ns_supports_compare(ns);
    3206             : 
    3207           0 :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3208           0 :                 return spdk_nvme_ns_get_md_size(ns) ? true : false;
    3209             : 
    3210           0 :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3211           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3212           0 :                 return cdata->oncs.dsm;
    3213             : 
    3214           0 :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3215           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3216           0 :                 return cdata->oncs.write_zeroes;
    3217             : 
    3218           0 :         case SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE:
    3219           0 :                 if (spdk_nvme_ctrlr_get_flags(ctrlr) &
    3220             :                     SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED) {
    3221           0 :                         return true;
    3222             :                 }
    3223           0 :                 return false;
    3224             : 
    3225           0 :         case SPDK_BDEV_IO_TYPE_GET_ZONE_INFO:
    3226             :         case SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT:
    3227           0 :                 return spdk_nvme_ns_get_csi(ns) == SPDK_NVME_CSI_ZNS;
    3228             : 
    3229           0 :         case SPDK_BDEV_IO_TYPE_ZONE_APPEND:
    3230           0 :                 return spdk_nvme_ns_get_csi(ns) == SPDK_NVME_CSI_ZNS &&
    3231           0 :                        spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_ZONE_APPEND_SUPPORTED;
    3232             : 
    3233           0 :         case SPDK_BDEV_IO_TYPE_COPY:
    3234           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3235           0 :                 return cdata->oncs.copy;
    3236             : 
    3237           0 :         default:
    3238           0 :                 return false;
    3239             :         }
    3240             : }
    3241             : 
    3242             : static int
    3243          57 : nvme_qpair_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ctrlr_channel *ctrlr_ch)
    3244             : {
    3245             :         struct nvme_qpair *nvme_qpair;
    3246             :         struct spdk_io_channel *pg_ch;
    3247             :         int rc;
    3248             : 
    3249          57 :         nvme_qpair = calloc(1, sizeof(*nvme_qpair));
    3250          57 :         if (!nvme_qpair) {
    3251           0 :                 SPDK_ERRLOG("Failed to alloc nvme_qpair.\n");
    3252           0 :                 return -1;
    3253             :         }
    3254             : 
    3255          57 :         TAILQ_INIT(&nvme_qpair->io_path_list);
    3256             : 
    3257          57 :         nvme_qpair->ctrlr = nvme_ctrlr;
    3258          57 :         nvme_qpair->ctrlr_ch = ctrlr_ch;
    3259             : 
    3260          57 :         pg_ch = spdk_get_io_channel(&g_nvme_bdev_ctrlrs);
    3261          57 :         if (!pg_ch) {
    3262           0 :                 free(nvme_qpair);
    3263           0 :                 return -1;
    3264             :         }
    3265             : 
    3266          57 :         nvme_qpair->group = spdk_io_channel_get_ctx(pg_ch);
    3267             : 
    3268             : #ifdef SPDK_CONFIG_VTUNE
    3269             :         nvme_qpair->group->collect_spin_stat = true;
    3270             : #else
    3271          57 :         nvme_qpair->group->collect_spin_stat = false;
    3272             : #endif
    3273             : 
    3274          57 :         if (!nvme_ctrlr->disabled) {
    3275             :                 /* If a nvme_ctrlr is disabled, don't try to create qpair for it. Qpair will
    3276             :                  * be created when it's enabled.
    3277             :                  */
    3278          57 :                 rc = bdev_nvme_create_qpair(nvme_qpair);
    3279          57 :                 if (rc != 0) {
    3280             :                         /* nvme_ctrlr can't create IO qpair if connection is down.
    3281             :                          * If reconnect_delay_sec is non-zero, creating IO qpair is retried
    3282             :                          * after reconnect_delay_sec seconds. If bdev_retry_count is non-zero,
    3283             :                          * submitted IO will be queued until IO qpair is successfully created.
    3284             :                          *
    3285             :                          * Hence, if both are satisfied, ignore the failure.
    3286             :                          */
    3287           0 :                         if (nvme_ctrlr->opts.reconnect_delay_sec == 0 || g_opts.bdev_retry_count == 0) {
    3288           0 :                                 spdk_put_io_channel(pg_ch);
    3289           0 :                                 free(nvme_qpair);
    3290           0 :                                 return rc;
    3291             :                         }
    3292             :                 }
    3293             :         }
    3294             : 
    3295          57 :         TAILQ_INSERT_TAIL(&nvme_qpair->group->qpair_list, nvme_qpair, tailq);
    3296             : 
    3297          57 :         ctrlr_ch->qpair = nvme_qpair;
    3298             : 
    3299          57 :         pthread_mutex_lock(&nvme_qpair->ctrlr->mutex);
    3300          57 :         nvme_qpair->ctrlr->ref++;
    3301          57 :         pthread_mutex_unlock(&nvme_qpair->ctrlr->mutex);
    3302             : 
    3303          57 :         return 0;
    3304             : }
    3305             : 
    3306             : static int
    3307          57 : bdev_nvme_create_ctrlr_channel_cb(void *io_device, void *ctx_buf)
    3308             : {
    3309          57 :         struct nvme_ctrlr *nvme_ctrlr = io_device;
    3310          57 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
    3311             : 
    3312          57 :         TAILQ_INIT(&ctrlr_ch->pending_resets);
    3313             : 
    3314          57 :         return nvme_qpair_create(nvme_ctrlr, ctrlr_ch);
    3315             : }
    3316             : 
    3317             : static void
    3318          57 : nvme_qpair_delete(struct nvme_qpair *nvme_qpair)
    3319             : {
    3320             :         struct nvme_io_path *io_path, *next;
    3321             : 
    3322          57 :         assert(nvme_qpair->group != NULL);
    3323             : 
    3324          92 :         TAILQ_FOREACH_SAFE(io_path, &nvme_qpair->io_path_list, tailq, next) {
    3325          35 :                 TAILQ_REMOVE(&nvme_qpair->io_path_list, io_path, tailq);
    3326          35 :                 nvme_io_path_free(io_path);
    3327             :         }
    3328             : 
    3329          57 :         TAILQ_REMOVE(&nvme_qpair->group->qpair_list, nvme_qpair, tailq);
    3330             : 
    3331          57 :         spdk_put_io_channel(spdk_io_channel_from_ctx(nvme_qpair->group));
    3332             : 
    3333          57 :         nvme_ctrlr_release(nvme_qpair->ctrlr);
    3334             : 
    3335          57 :         free(nvme_qpair);
    3336          57 : }
    3337             : 
    3338             : static void
    3339          57 : bdev_nvme_destroy_ctrlr_channel_cb(void *io_device, void *ctx_buf)
    3340             : {
    3341          57 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
    3342             :         struct nvme_qpair *nvme_qpair;
    3343             : 
    3344          57 :         nvme_qpair = ctrlr_ch->qpair;
    3345          57 :         assert(nvme_qpair != NULL);
    3346             : 
    3347          57 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    3348             : 
    3349          57 :         if (nvme_qpair->qpair != NULL) {
    3350          43 :                 if (ctrlr_ch->reset_iter == NULL) {
    3351          43 :                         spdk_nvme_ctrlr_disconnect_io_qpair(nvme_qpair->qpair);
    3352             :                 } else {
    3353             :                         /* Skip current ctrlr_channel in a full reset sequence because
    3354             :                          * it is being deleted now. The qpair is already being disconnected.
    3355             :                          * We do not have to restart disconnecting it.
    3356             :                          */
    3357           0 :                         spdk_for_each_channel_continue(ctrlr_ch->reset_iter, 0);
    3358             :                 }
    3359             : 
    3360             :                 /* We cannot release a reference to the poll group now.
    3361             :                  * The qpair may be disconnected asynchronously later.
    3362             :                  * We need to poll it until it is actually disconnected.
    3363             :                  * Just detach the qpair from the deleting ctrlr_channel.
    3364             :                  */
    3365          43 :                 nvme_qpair->ctrlr_ch = NULL;
    3366             :         } else {
    3367          14 :                 assert(ctrlr_ch->reset_iter == NULL);
    3368             : 
    3369          14 :                 nvme_qpair_delete(nvme_qpair);
    3370             :         }
    3371          57 : }
    3372             : 
    3373             : static inline struct spdk_io_channel *
    3374           0 : bdev_nvme_get_accel_channel(struct nvme_poll_group *group)
    3375             : {
    3376           0 :         if (spdk_unlikely(!group->accel_channel)) {
    3377           0 :                 group->accel_channel = spdk_accel_get_io_channel();
    3378           0 :                 if (!group->accel_channel) {
    3379           0 :                         SPDK_ERRLOG("Cannot get the accel_channel for bdev nvme polling group=%p\n",
    3380             :                                     group);
    3381           0 :                         return NULL;
    3382             :                 }
    3383             :         }
    3384             : 
    3385           0 :         return group->accel_channel;
    3386             : }
    3387             : 
    3388             : static void
    3389           0 : bdev_nvme_submit_accel_crc32c(void *ctx, uint32_t *dst, struct iovec *iov,
    3390             :                               uint32_t iov_cnt, uint32_t seed,
    3391             :                               spdk_nvme_accel_completion_cb cb_fn, void *cb_arg)
    3392             : {
    3393             :         struct spdk_io_channel *accel_ch;
    3394           0 :         struct nvme_poll_group *group = ctx;
    3395             :         int rc;
    3396             : 
    3397           0 :         assert(cb_fn != NULL);
    3398             : 
    3399           0 :         accel_ch = bdev_nvme_get_accel_channel(group);
    3400           0 :         if (spdk_unlikely(accel_ch == NULL)) {
    3401           0 :                 cb_fn(cb_arg, -ENOMEM);
    3402           0 :                 return;
    3403             :         }
    3404             : 
    3405           0 :         rc = spdk_accel_submit_crc32cv(accel_ch, dst, iov, iov_cnt, seed, cb_fn, cb_arg);
    3406           0 :         if (rc) {
    3407             :                 /* For the two cases, spdk_accel_submit_crc32cv does not call the user's cb_fn */
    3408           0 :                 if (rc == -ENOMEM || rc == -EINVAL) {
    3409           0 :                         cb_fn(cb_arg, rc);
    3410             :                 }
    3411           0 :                 SPDK_ERRLOG("Cannot complete the accelerated crc32c operation with iov=%p\n", iov);
    3412             :         }
    3413             : }
    3414             : 
    3415             : static void
    3416           0 : bdev_nvme_finish_sequence(void *seq, spdk_nvme_accel_completion_cb cb_fn, void *cb_arg)
    3417             : {
    3418           0 :         spdk_accel_sequence_finish(seq, cb_fn, cb_arg);
    3419           0 : }
    3420             : 
    3421             : static void
    3422           0 : bdev_nvme_abort_sequence(void *seq)
    3423             : {
    3424           0 :         spdk_accel_sequence_abort(seq);
    3425           0 : }
    3426             : 
    3427             : static void
    3428           0 : bdev_nvme_reverse_sequence(void *seq)
    3429             : {
    3430           0 :         spdk_accel_sequence_reverse(seq);
    3431           0 : }
    3432             : 
    3433             : static int
    3434           0 : bdev_nvme_append_crc32c(void *ctx, void **seq, uint32_t *dst, struct iovec *iovs, uint32_t iovcnt,
    3435             :                         struct spdk_memory_domain *domain, void *domain_ctx, uint32_t seed,
    3436             :                         spdk_nvme_accel_step_cb cb_fn, void *cb_arg)
    3437             : {
    3438             :         struct spdk_io_channel *ch;
    3439           0 :         struct nvme_poll_group *group = ctx;
    3440             : 
    3441           0 :         ch = bdev_nvme_get_accel_channel(group);
    3442           0 :         if (spdk_unlikely(ch == NULL)) {
    3443           0 :                 return -ENOMEM;
    3444             :         }
    3445             : 
    3446           0 :         return spdk_accel_append_crc32c((struct spdk_accel_sequence **)seq, ch, dst, iovs, iovcnt,
    3447             :                                         domain, domain_ctx, seed, cb_fn, cb_arg);
    3448             : }
    3449             : 
    3450             : static struct spdk_nvme_accel_fn_table g_bdev_nvme_accel_fn_table = {
    3451             :         .table_size             = sizeof(struct spdk_nvme_accel_fn_table),
    3452             :         .submit_accel_crc32c    = bdev_nvme_submit_accel_crc32c,
    3453             :         .append_crc32c          = bdev_nvme_append_crc32c,
    3454             :         .finish_sequence        = bdev_nvme_finish_sequence,
    3455             :         .reverse_sequence       = bdev_nvme_reverse_sequence,
    3456             :         .abort_sequence         = bdev_nvme_abort_sequence,
    3457             : };
    3458             : 
    3459             : static int
    3460          42 : bdev_nvme_create_poll_group_cb(void *io_device, void *ctx_buf)
    3461             : {
    3462          42 :         struct nvme_poll_group *group = ctx_buf;
    3463             : 
    3464          42 :         TAILQ_INIT(&group->qpair_list);
    3465             : 
    3466          42 :         group->group = spdk_nvme_poll_group_create(group, &g_bdev_nvme_accel_fn_table);
    3467          42 :         if (group->group == NULL) {
    3468           0 :                 return -1;
    3469             :         }
    3470             : 
    3471          42 :         group->poller = SPDK_POLLER_REGISTER(bdev_nvme_poll, group, g_opts.nvme_ioq_poll_period_us);
    3472             : 
    3473          42 :         if (group->poller == NULL) {
    3474           0 :                 spdk_nvme_poll_group_destroy(group->group);
    3475           0 :                 return -1;
    3476             :         }
    3477             : 
    3478          42 :         return 0;
    3479             : }
    3480             : 
    3481             : static void
    3482          42 : bdev_nvme_destroy_poll_group_cb(void *io_device, void *ctx_buf)
    3483             : {
    3484          42 :         struct nvme_poll_group *group = ctx_buf;
    3485             : 
    3486          42 :         assert(TAILQ_EMPTY(&group->qpair_list));
    3487             : 
    3488          42 :         if (group->accel_channel) {
    3489           0 :                 spdk_put_io_channel(group->accel_channel);
    3490             :         }
    3491             : 
    3492          42 :         spdk_poller_unregister(&group->poller);
    3493          42 :         if (spdk_nvme_poll_group_destroy(group->group)) {
    3494           0 :                 SPDK_ERRLOG("Unable to destroy a poll group for the NVMe bdev module.\n");
    3495           0 :                 assert(false);
    3496             :         }
    3497          42 : }
    3498             : 
    3499             : static struct spdk_io_channel *
    3500           0 : bdev_nvme_get_io_channel(void *ctx)
    3501             : {
    3502           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3503             : 
    3504           0 :         return spdk_get_io_channel(nvme_bdev);
    3505             : }
    3506             : 
    3507             : static void *
    3508           0 : bdev_nvme_get_module_ctx(void *ctx)
    3509             : {
    3510           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3511             :         struct nvme_ns *nvme_ns;
    3512             : 
    3513           0 :         if (!nvme_bdev || nvme_bdev->disk.module != &nvme_if) {
    3514           0 :                 return NULL;
    3515             :         }
    3516             : 
    3517           0 :         nvme_ns = TAILQ_FIRST(&nvme_bdev->nvme_ns_list);
    3518           0 :         if (!nvme_ns) {
    3519           0 :                 return NULL;
    3520             :         }
    3521             : 
    3522           0 :         return nvme_ns->ns;
    3523             : }
    3524             : 
    3525             : static const char *
    3526           0 : _nvme_ana_state_str(enum spdk_nvme_ana_state ana_state)
    3527             : {
    3528           0 :         switch (ana_state) {
    3529           0 :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    3530           0 :                 return "optimized";
    3531           0 :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    3532           0 :                 return "non_optimized";
    3533           0 :         case SPDK_NVME_ANA_INACCESSIBLE_STATE:
    3534           0 :                 return "inaccessible";
    3535           0 :         case SPDK_NVME_ANA_PERSISTENT_LOSS_STATE:
    3536           0 :                 return "persistent_loss";
    3537           0 :         case SPDK_NVME_ANA_CHANGE_STATE:
    3538           0 :                 return "change";
    3539           0 :         default:
    3540           0 :                 return NULL;
    3541             :         }
    3542             : }
    3543             : 
    3544             : static int
    3545           8 : bdev_nvme_get_memory_domains(void *ctx, struct spdk_memory_domain **domains, int array_size)
    3546             : {
    3547           8 :         struct spdk_memory_domain **_domains = NULL;
    3548           8 :         struct nvme_bdev *nbdev = ctx;
    3549             :         struct nvme_ns *nvme_ns;
    3550           8 :         int i = 0, _array_size = array_size;
    3551           8 :         int rc = 0;
    3552             : 
    3553          22 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
    3554          14 :                 if (domains && array_size >= i) {
    3555          11 :                         _domains = &domains[i];
    3556             :                 } else {
    3557           3 :                         _domains = NULL;
    3558             :                 }
    3559          14 :                 rc = spdk_nvme_ctrlr_get_memory_domains(nvme_ns->ctrlr->ctrlr, _domains, _array_size);
    3560          14 :                 if (rc > 0) {
    3561          13 :                         i += rc;
    3562          13 :                         if (_array_size >= rc) {
    3563           9 :                                 _array_size -= rc;
    3564             :                         } else {
    3565           4 :                                 _array_size = 0;
    3566             :                         }
    3567           1 :                 } else if (rc < 0) {
    3568           0 :                         return rc;
    3569             :                 }
    3570             :         }
    3571             : 
    3572           8 :         return i;
    3573             : }
    3574             : 
    3575             : static const char *
    3576           0 : nvme_ctrlr_get_state_str(struct nvme_ctrlr *nvme_ctrlr)
    3577             : {
    3578           0 :         if (nvme_ctrlr->destruct) {
    3579           0 :                 return "deleting";
    3580           0 :         } else if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    3581           0 :                 return "failed";
    3582           0 :         } else if (nvme_ctrlr->resetting) {
    3583           0 :                 return "resetting";
    3584           0 :         } else if (nvme_ctrlr->reconnect_is_delayed > 0) {
    3585           0 :                 return "reconnect_is_delayed";
    3586           0 :         } else if (nvme_ctrlr->disabled) {
    3587           0 :                 return "disabled";
    3588             :         } else {
    3589           0 :                 return "enabled";
    3590             :         }
    3591             : }
    3592             : 
    3593             : void
    3594           0 : nvme_ctrlr_info_json(struct spdk_json_write_ctx *w, struct nvme_ctrlr *nvme_ctrlr)
    3595           0 : {
    3596             :         struct spdk_nvme_transport_id *trid;
    3597             :         const struct spdk_nvme_ctrlr_opts *opts;
    3598             :         const struct spdk_nvme_ctrlr_data *cdata;
    3599             :         struct nvme_path_id *path_id;
    3600             : 
    3601           0 :         spdk_json_write_object_begin(w);
    3602             : 
    3603           0 :         spdk_json_write_named_string(w, "state", nvme_ctrlr_get_state_str(nvme_ctrlr));
    3604             : 
    3605             : #ifdef SPDK_CONFIG_NVME_CUSE
    3606           0 :         size_t cuse_name_size = 128;
    3607           0 :         char cuse_name[cuse_name_size];
    3608             : 
    3609           0 :         int rc = spdk_nvme_cuse_get_ctrlr_name(nvme_ctrlr->ctrlr, cuse_name, &cuse_name_size);
    3610           0 :         if (rc == 0) {
    3611           0 :                 spdk_json_write_named_string(w, "cuse_device", cuse_name);
    3612             :         }
    3613             : #endif
    3614           0 :         trid = &nvme_ctrlr->active_path_id->trid;
    3615           0 :         spdk_json_write_named_object_begin(w, "trid");
    3616           0 :         nvme_bdev_dump_trid_json(trid, w);
    3617           0 :         spdk_json_write_object_end(w);
    3618             : 
    3619           0 :         path_id = TAILQ_NEXT(nvme_ctrlr->active_path_id, link);
    3620           0 :         if (path_id != NULL) {
    3621           0 :                 spdk_json_write_named_array_begin(w, "alternate_trids");
    3622             :                 do {
    3623           0 :                         trid = &path_id->trid;
    3624           0 :                         spdk_json_write_object_begin(w);
    3625           0 :                         nvme_bdev_dump_trid_json(trid, w);
    3626           0 :                         spdk_json_write_object_end(w);
    3627             : 
    3628           0 :                         path_id = TAILQ_NEXT(path_id, link);
    3629           0 :                 } while (path_id != NULL);
    3630           0 :                 spdk_json_write_array_end(w);
    3631             :         }
    3632             : 
    3633           0 :         cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    3634           0 :         spdk_json_write_named_uint16(w, "cntlid", cdata->cntlid);
    3635             : 
    3636           0 :         opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
    3637           0 :         spdk_json_write_named_object_begin(w, "host");
    3638           0 :         spdk_json_write_named_string(w, "nqn", opts->hostnqn);
    3639           0 :         spdk_json_write_named_string(w, "addr", opts->src_addr);
    3640           0 :         spdk_json_write_named_string(w, "svcid", opts->src_svcid);
    3641           0 :         spdk_json_write_object_end(w);
    3642             : 
    3643           0 :         spdk_json_write_object_end(w);
    3644           0 : }
    3645             : 
    3646             : static void
    3647           0 : nvme_namespace_info_json(struct spdk_json_write_ctx *w,
    3648             :                          struct nvme_ns *nvme_ns)
    3649           0 : {
    3650             :         struct spdk_nvme_ns *ns;
    3651             :         struct spdk_nvme_ctrlr *ctrlr;
    3652             :         const struct spdk_nvme_ctrlr_data *cdata;
    3653             :         const struct spdk_nvme_transport_id *trid;
    3654             :         union spdk_nvme_vs_register vs;
    3655             :         const struct spdk_nvme_ns_data *nsdata;
    3656           0 :         char buf[128];
    3657             : 
    3658           0 :         ns = nvme_ns->ns;
    3659           0 :         if (ns == NULL) {
    3660           0 :                 return;
    3661             :         }
    3662             : 
    3663           0 :         ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    3664             : 
    3665           0 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3666           0 :         trid = spdk_nvme_ctrlr_get_transport_id(ctrlr);
    3667           0 :         vs = spdk_nvme_ctrlr_get_regs_vs(ctrlr);
    3668             : 
    3669           0 :         spdk_json_write_object_begin(w);
    3670             : 
    3671           0 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    3672           0 :                 spdk_json_write_named_string(w, "pci_address", trid->traddr);
    3673             :         }
    3674             : 
    3675           0 :         spdk_json_write_named_object_begin(w, "trid");
    3676             : 
    3677           0 :         nvme_bdev_dump_trid_json(trid, w);
    3678             : 
    3679           0 :         spdk_json_write_object_end(w);
    3680             : 
    3681             : #ifdef SPDK_CONFIG_NVME_CUSE
    3682           0 :         size_t cuse_name_size = 128;
    3683           0 :         char cuse_name[cuse_name_size];
    3684             : 
    3685           0 :         int rc = spdk_nvme_cuse_get_ns_name(ctrlr, spdk_nvme_ns_get_id(ns),
    3686             :                                             cuse_name, &cuse_name_size);
    3687           0 :         if (rc == 0) {
    3688           0 :                 spdk_json_write_named_string(w, "cuse_device", cuse_name);
    3689             :         }
    3690             : #endif
    3691             : 
    3692           0 :         spdk_json_write_named_object_begin(w, "ctrlr_data");
    3693             : 
    3694           0 :         spdk_json_write_named_uint16(w, "cntlid", cdata->cntlid);
    3695             : 
    3696           0 :         spdk_json_write_named_string_fmt(w, "vendor_id", "0x%04x", cdata->vid);
    3697             : 
    3698           0 :         snprintf(buf, sizeof(cdata->mn) + 1, "%s", cdata->mn);
    3699           0 :         spdk_str_trim(buf);
    3700           0 :         spdk_json_write_named_string(w, "model_number", buf);
    3701             : 
    3702           0 :         snprintf(buf, sizeof(cdata->sn) + 1, "%s", cdata->sn);
    3703           0 :         spdk_str_trim(buf);
    3704           0 :         spdk_json_write_named_string(w, "serial_number", buf);
    3705             : 
    3706           0 :         snprintf(buf, sizeof(cdata->fr) + 1, "%s", cdata->fr);
    3707           0 :         spdk_str_trim(buf);
    3708           0 :         spdk_json_write_named_string(w, "firmware_revision", buf);
    3709             : 
    3710           0 :         if (cdata->subnqn[0] != '\0') {
    3711           0 :                 spdk_json_write_named_string(w, "subnqn", cdata->subnqn);
    3712             :         }
    3713             : 
    3714           0 :         spdk_json_write_named_object_begin(w, "oacs");
    3715             : 
    3716           0 :         spdk_json_write_named_uint32(w, "security", cdata->oacs.security);
    3717           0 :         spdk_json_write_named_uint32(w, "format", cdata->oacs.format);
    3718           0 :         spdk_json_write_named_uint32(w, "firmware", cdata->oacs.firmware);
    3719           0 :         spdk_json_write_named_uint32(w, "ns_manage", cdata->oacs.ns_manage);
    3720             : 
    3721           0 :         spdk_json_write_object_end(w);
    3722             : 
    3723           0 :         spdk_json_write_named_bool(w, "multi_ctrlr", cdata->cmic.multi_ctrlr);
    3724           0 :         spdk_json_write_named_bool(w, "ana_reporting", cdata->cmic.ana_reporting);
    3725             : 
    3726           0 :         spdk_json_write_object_end(w);
    3727             : 
    3728           0 :         spdk_json_write_named_object_begin(w, "vs");
    3729             : 
    3730           0 :         spdk_json_write_name(w, "nvme_version");
    3731           0 :         if (vs.bits.ter) {
    3732           0 :                 spdk_json_write_string_fmt(w, "%u.%u.%u", vs.bits.mjr, vs.bits.mnr, vs.bits.ter);
    3733             :         } else {
    3734           0 :                 spdk_json_write_string_fmt(w, "%u.%u", vs.bits.mjr, vs.bits.mnr);
    3735             :         }
    3736             : 
    3737           0 :         spdk_json_write_object_end(w);
    3738             : 
    3739           0 :         nsdata = spdk_nvme_ns_get_data(ns);
    3740             : 
    3741           0 :         spdk_json_write_named_object_begin(w, "ns_data");
    3742             : 
    3743           0 :         spdk_json_write_named_uint32(w, "id", spdk_nvme_ns_get_id(ns));
    3744             : 
    3745           0 :         if (cdata->cmic.ana_reporting) {
    3746           0 :                 spdk_json_write_named_string(w, "ana_state",
    3747             :                                              _nvme_ana_state_str(nvme_ns->ana_state));
    3748             :         }
    3749             : 
    3750           0 :         spdk_json_write_named_bool(w, "can_share", nsdata->nmic.can_share);
    3751             : 
    3752           0 :         spdk_json_write_object_end(w);
    3753             : 
    3754           0 :         if (cdata->oacs.security) {
    3755           0 :                 spdk_json_write_named_object_begin(w, "security");
    3756             : 
    3757           0 :                 spdk_json_write_named_bool(w, "opal", nvme_ns->bdev->opal);
    3758             : 
    3759           0 :                 spdk_json_write_object_end(w);
    3760             :         }
    3761             : 
    3762           0 :         spdk_json_write_object_end(w);
    3763             : }
    3764             : 
    3765             : static const char *
    3766           0 : nvme_bdev_get_mp_policy_str(struct nvme_bdev *nbdev)
    3767             : {
    3768           0 :         switch (nbdev->mp_policy) {
    3769           0 :         case BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE:
    3770           0 :                 return "active_passive";
    3771           0 :         case BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE:
    3772           0 :                 return "active_active";
    3773           0 :         default:
    3774           0 :                 assert(false);
    3775             :                 return "invalid";
    3776             :         }
    3777             : }
    3778             : 
    3779             : static const char *
    3780           0 : nvme_bdev_get_mp_selector_str(struct nvme_bdev *nbdev)
    3781             : {
    3782           0 :         switch (nbdev->mp_selector) {
    3783           0 :         case BDEV_NVME_MP_SELECTOR_ROUND_ROBIN:
    3784           0 :                 return "round_robin";
    3785           0 :         case BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH:
    3786           0 :                 return "queue_depth";
    3787           0 :         default:
    3788           0 :                 assert(false);
    3789             :                 return "invalid";
    3790             :         }
    3791             : }
    3792             : 
    3793             : static int
    3794           0 : bdev_nvme_dump_info_json(void *ctx, struct spdk_json_write_ctx *w)
    3795             : {
    3796           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3797             :         struct nvme_ns *nvme_ns;
    3798             : 
    3799           0 :         pthread_mutex_lock(&nvme_bdev->mutex);
    3800           0 :         spdk_json_write_named_array_begin(w, "nvme");
    3801           0 :         TAILQ_FOREACH(nvme_ns, &nvme_bdev->nvme_ns_list, tailq) {
    3802           0 :                 nvme_namespace_info_json(w, nvme_ns);
    3803             :         }
    3804           0 :         spdk_json_write_array_end(w);
    3805           0 :         spdk_json_write_named_string(w, "mp_policy", nvme_bdev_get_mp_policy_str(nvme_bdev));
    3806           0 :         if (nvme_bdev->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    3807           0 :                 spdk_json_write_named_string(w, "selector", nvme_bdev_get_mp_selector_str(nvme_bdev));
    3808           0 :                 if (nvme_bdev->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    3809           0 :                         spdk_json_write_named_uint32(w, "rr_min_io", nvme_bdev->rr_min_io);
    3810             :                 }
    3811             :         }
    3812           0 :         pthread_mutex_unlock(&nvme_bdev->mutex);
    3813             : 
    3814           0 :         return 0;
    3815             : }
    3816             : 
    3817             : static void
    3818           0 : bdev_nvme_write_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    3819             : {
    3820             :         /* No config per bdev needed */
    3821           0 : }
    3822             : 
    3823             : static uint64_t
    3824           0 : bdev_nvme_get_spin_time(struct spdk_io_channel *ch)
    3825             : {
    3826           0 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
    3827             :         struct nvme_io_path *io_path;
    3828             :         struct nvme_poll_group *group;
    3829           0 :         uint64_t spin_time = 0;
    3830             : 
    3831           0 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    3832           0 :                 group = io_path->qpair->group;
    3833             : 
    3834           0 :                 if (!group || !group->collect_spin_stat) {
    3835           0 :                         continue;
    3836             :                 }
    3837             : 
    3838           0 :                 if (group->end_ticks != 0) {
    3839           0 :                         group->spin_ticks += (group->end_ticks - group->start_ticks);
    3840           0 :                         group->end_ticks = 0;
    3841             :                 }
    3842             : 
    3843           0 :                 spin_time += group->spin_ticks;
    3844           0 :                 group->start_ticks = 0;
    3845           0 :                 group->spin_ticks = 0;
    3846             :         }
    3847             : 
    3848           0 :         return (spin_time * 1000000ULL) / spdk_get_ticks_hz();
    3849             : }
    3850             : 
    3851             : static void
    3852           0 : bdev_nvme_reset_device_stat(void *ctx)
    3853             : {
    3854           0 :         struct nvme_bdev *nbdev = ctx;
    3855             : 
    3856           0 :         if (nbdev->err_stat != NULL) {
    3857           0 :                 memset(nbdev->err_stat, 0, sizeof(struct nvme_error_stat));
    3858             :         }
    3859           0 : }
    3860             : 
    3861             : /* JSON string should be lowercases and underscore delimited string. */
    3862             : static void
    3863           0 : bdev_nvme_format_nvme_status(char *dst, const char *src)
    3864             : {
    3865           0 :         char tmp[256];
    3866             : 
    3867           0 :         spdk_strcpy_replace(dst, 256, src, " - ", "_");
    3868           0 :         spdk_strcpy_replace(tmp, 256, dst, "-", "_");
    3869           0 :         spdk_strcpy_replace(dst, 256, tmp, " ", "_");
    3870           0 :         spdk_strlwr(dst);
    3871           0 : }
    3872             : 
    3873             : static void
    3874           0 : bdev_nvme_dump_device_stat_json(void *ctx, struct spdk_json_write_ctx *w)
    3875             : {
    3876           0 :         struct nvme_bdev *nbdev = ctx;
    3877           0 :         struct spdk_nvme_status status = {};
    3878             :         uint16_t sct, sc;
    3879           0 :         char status_json[256];
    3880             :         const char *status_str;
    3881             : 
    3882           0 :         if (nbdev->err_stat == NULL) {
    3883           0 :                 return;
    3884             :         }
    3885             : 
    3886           0 :         spdk_json_write_named_object_begin(w, "nvme_error");
    3887             : 
    3888           0 :         spdk_json_write_named_object_begin(w, "status_type");
    3889           0 :         for (sct = 0; sct < 8; sct++) {
    3890           0 :                 if (nbdev->err_stat->status_type[sct] == 0) {
    3891           0 :                         continue;
    3892             :                 }
    3893           0 :                 status.sct = sct;
    3894             : 
    3895           0 :                 status_str = spdk_nvme_cpl_get_status_type_string(&status);
    3896           0 :                 assert(status_str != NULL);
    3897           0 :                 bdev_nvme_format_nvme_status(status_json, status_str);
    3898             : 
    3899           0 :                 spdk_json_write_named_uint32(w, status_json, nbdev->err_stat->status_type[sct]);
    3900             :         }
    3901           0 :         spdk_json_write_object_end(w);
    3902             : 
    3903           0 :         spdk_json_write_named_object_begin(w, "status_code");
    3904           0 :         for (sct = 0; sct < 4; sct++) {
    3905           0 :                 status.sct = sct;
    3906           0 :                 for (sc = 0; sc < 256; sc++) {
    3907           0 :                         if (nbdev->err_stat->status[sct][sc] == 0) {
    3908           0 :                                 continue;
    3909             :                         }
    3910           0 :                         status.sc = sc;
    3911             : 
    3912           0 :                         status_str = spdk_nvme_cpl_get_status_string(&status);
    3913           0 :                         assert(status_str != NULL);
    3914           0 :                         bdev_nvme_format_nvme_status(status_json, status_str);
    3915             : 
    3916           0 :                         spdk_json_write_named_uint32(w, status_json, nbdev->err_stat->status[sct][sc]);
    3917             :                 }
    3918             :         }
    3919           0 :         spdk_json_write_object_end(w);
    3920             : 
    3921           0 :         spdk_json_write_object_end(w);
    3922             : }
    3923             : 
    3924             : static bool
    3925           0 : bdev_nvme_accel_sequence_supported(void *ctx, enum spdk_bdev_io_type type)
    3926             : {
    3927           0 :         struct nvme_bdev *nbdev = ctx;
    3928             :         struct spdk_nvme_ctrlr *ctrlr;
    3929             : 
    3930           0 :         if (!g_opts.allow_accel_sequence) {
    3931           0 :                 return false;
    3932             :         }
    3933             : 
    3934           0 :         switch (type) {
    3935           0 :         case SPDK_BDEV_IO_TYPE_WRITE:
    3936             :         case SPDK_BDEV_IO_TYPE_READ:
    3937           0 :                 break;
    3938           0 :         default:
    3939           0 :                 return false;
    3940             :         }
    3941             : 
    3942           0 :         ctrlr = bdev_nvme_get_ctrlr(&nbdev->disk);
    3943           0 :         assert(ctrlr != NULL);
    3944             : 
    3945           0 :         return spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_ACCEL_SEQUENCE_SUPPORTED;
    3946             : }
    3947             : 
    3948             : static const struct spdk_bdev_fn_table nvmelib_fn_table = {
    3949             :         .destruct                       = bdev_nvme_destruct,
    3950             :         .submit_request                 = bdev_nvme_submit_request,
    3951             :         .io_type_supported              = bdev_nvme_io_type_supported,
    3952             :         .get_io_channel                 = bdev_nvme_get_io_channel,
    3953             :         .dump_info_json                 = bdev_nvme_dump_info_json,
    3954             :         .write_config_json              = bdev_nvme_write_config_json,
    3955             :         .get_spin_time                  = bdev_nvme_get_spin_time,
    3956             :         .get_module_ctx                 = bdev_nvme_get_module_ctx,
    3957             :         .get_memory_domains             = bdev_nvme_get_memory_domains,
    3958             :         .accel_sequence_supported       = bdev_nvme_accel_sequence_supported,
    3959             :         .reset_device_stat              = bdev_nvme_reset_device_stat,
    3960             :         .dump_device_stat_json          = bdev_nvme_dump_device_stat_json,
    3961             : };
    3962             : 
    3963             : typedef int (*bdev_nvme_parse_ana_log_page_cb)(
    3964             :         const struct spdk_nvme_ana_group_descriptor *desc, void *cb_arg);
    3965             : 
    3966             : static int
    3967          40 : bdev_nvme_parse_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
    3968             :                              bdev_nvme_parse_ana_log_page_cb cb_fn, void *cb_arg)
    3969             : {
    3970             :         struct spdk_nvme_ana_group_descriptor *copied_desc;
    3971             :         uint8_t *orig_desc;
    3972             :         uint32_t i, desc_size, copy_len;
    3973          40 :         int rc = 0;
    3974             : 
    3975          40 :         if (nvme_ctrlr->ana_log_page == NULL) {
    3976           0 :                 return -EINVAL;
    3977             :         }
    3978             : 
    3979          40 :         copied_desc = nvme_ctrlr->copied_ana_desc;
    3980             : 
    3981          40 :         orig_desc = (uint8_t *)nvme_ctrlr->ana_log_page + sizeof(struct spdk_nvme_ana_page);
    3982          40 :         copy_len = nvme_ctrlr->max_ana_log_page_size - sizeof(struct spdk_nvme_ana_page);
    3983             : 
    3984          69 :         for (i = 0; i < nvme_ctrlr->ana_log_page->num_ana_group_desc; i++) {
    3985          65 :                 memcpy(copied_desc, orig_desc, copy_len);
    3986             : 
    3987          65 :                 rc = cb_fn(copied_desc, cb_arg);
    3988          65 :                 if (rc != 0) {
    3989          36 :                         break;
    3990             :                 }
    3991             : 
    3992          29 :                 desc_size = sizeof(struct spdk_nvme_ana_group_descriptor) +
    3993          29 :                             copied_desc->num_of_nsid * sizeof(uint32_t);
    3994          29 :                 orig_desc += desc_size;
    3995          29 :                 copy_len -= desc_size;
    3996             :         }
    3997             : 
    3998          40 :         return rc;
    3999             : }
    4000             : 
    4001             : static int
    4002           5 : nvme_ns_ana_transition_timedout(void *ctx)
    4003             : {
    4004           5 :         struct nvme_ns *nvme_ns = ctx;
    4005             : 
    4006           5 :         spdk_poller_unregister(&nvme_ns->anatt_timer);
    4007           5 :         nvme_ns->ana_transition_timedout = true;
    4008             : 
    4009           5 :         return SPDK_POLLER_BUSY;
    4010             : }
    4011             : 
    4012             : static void
    4013          45 : _nvme_ns_set_ana_state(struct nvme_ns *nvme_ns,
    4014             :                        const struct spdk_nvme_ana_group_descriptor *desc)
    4015             : {
    4016             :         const struct spdk_nvme_ctrlr_data *cdata;
    4017             : 
    4018          45 :         nvme_ns->ana_group_id = desc->ana_group_id;
    4019          45 :         nvme_ns->ana_state = desc->ana_state;
    4020          45 :         nvme_ns->ana_state_updating = false;
    4021             : 
    4022          45 :         switch (nvme_ns->ana_state) {
    4023          38 :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    4024             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    4025          38 :                 nvme_ns->ana_transition_timedout = false;
    4026          38 :                 spdk_poller_unregister(&nvme_ns->anatt_timer);
    4027          38 :                 break;
    4028             : 
    4029           6 :         case SPDK_NVME_ANA_INACCESSIBLE_STATE:
    4030             :         case SPDK_NVME_ANA_CHANGE_STATE:
    4031           6 :                 if (nvme_ns->anatt_timer != NULL) {
    4032           1 :                         break;
    4033             :                 }
    4034             : 
    4035           5 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ns->ctrlr->ctrlr);
    4036           5 :                 nvme_ns->anatt_timer = SPDK_POLLER_REGISTER(nvme_ns_ana_transition_timedout,
    4037             :                                        nvme_ns,
    4038             :                                        cdata->anatt * SPDK_SEC_TO_USEC);
    4039           5 :                 break;
    4040           1 :         default:
    4041           1 :                 break;
    4042             :         }
    4043          45 : }
    4044             : 
    4045             : static int
    4046          59 : nvme_ns_set_ana_state(const struct spdk_nvme_ana_group_descriptor *desc, void *cb_arg)
    4047             : {
    4048          59 :         struct nvme_ns *nvme_ns = cb_arg;
    4049             :         uint32_t i;
    4050             : 
    4051          59 :         assert(nvme_ns->ns != NULL);
    4052             : 
    4053          81 :         for (i = 0; i < desc->num_of_nsid; i++) {
    4054          58 :                 if (desc->nsid[i] != spdk_nvme_ns_get_id(nvme_ns->ns)) {
    4055          22 :                         continue;
    4056             :                 }
    4057             : 
    4058          36 :                 _nvme_ns_set_ana_state(nvme_ns, desc);
    4059          36 :                 return 1;
    4060             :         }
    4061             : 
    4062          23 :         return 0;
    4063             : }
    4064             : 
    4065             : static int
    4066           5 : nvme_generate_uuid(const char *sn, uint32_t nsid, struct spdk_uuid *uuid)
    4067             : {
    4068           5 :         int rc = 0;
    4069           5 :         struct spdk_uuid new_uuid, namespace_uuid;
    4070           5 :         char merged_str[SPDK_NVME_CTRLR_SN_LEN + NSID_STR_LEN + 1] = {'\0'};
    4071             :         /* This namespace UUID was generated using uuid_generate() method. */
    4072           5 :         const char *namespace_str = {"edaed2de-24bc-4b07-b559-f47ecbe730fd"};
    4073             :         int size;
    4074             : 
    4075           5 :         assert(strlen(sn) <= SPDK_NVME_CTRLR_SN_LEN);
    4076             : 
    4077           5 :         spdk_uuid_set_null(&new_uuid);
    4078           5 :         spdk_uuid_set_null(&namespace_uuid);
    4079             : 
    4080           5 :         size = snprintf(merged_str, sizeof(merged_str), "%s%"PRIu32, sn, nsid);
    4081           5 :         if (size <= 0 || (unsigned long)size >= sizeof(merged_str)) {
    4082           0 :                 return -EINVAL;
    4083             :         }
    4084             : 
    4085           5 :         spdk_uuid_parse(&namespace_uuid, namespace_str);
    4086             : 
    4087           5 :         rc = spdk_uuid_generate_sha1(&new_uuid, &namespace_uuid, merged_str, size);
    4088           5 :         if (rc == 0) {
    4089           5 :                 memcpy(uuid, &new_uuid, sizeof(struct spdk_uuid));
    4090             :         }
    4091             : 
    4092           5 :         return rc;
    4093             : }
    4094             : 
    4095             : static int
    4096          37 : nvme_disk_create(struct spdk_bdev *disk, const char *base_name,
    4097             :                  struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_ns *ns,
    4098             :                  uint32_t prchk_flags, void *ctx)
    4099             : {
    4100             :         const struct spdk_uuid          *uuid;
    4101             :         const uint8_t *nguid;
    4102             :         const struct spdk_nvme_ctrlr_data *cdata;
    4103             :         const struct spdk_nvme_ns_data  *nsdata;
    4104             :         const struct spdk_nvme_ctrlr_opts *opts;
    4105             :         enum spdk_nvme_csi              csi;
    4106             :         uint32_t atomic_bs, phys_bs, bs;
    4107          37 :         char sn_tmp[SPDK_NVME_CTRLR_SN_LEN + 1] = {'\0'};
    4108             :         int rc;
    4109             : 
    4110          37 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    4111          37 :         csi = spdk_nvme_ns_get_csi(ns);
    4112          37 :         opts = spdk_nvme_ctrlr_get_opts(ctrlr);
    4113             : 
    4114          37 :         switch (csi) {
    4115          37 :         case SPDK_NVME_CSI_NVM:
    4116          37 :                 disk->product_name = "NVMe disk";
    4117          37 :                 break;
    4118           0 :         case SPDK_NVME_CSI_ZNS:
    4119           0 :                 disk->product_name = "NVMe ZNS disk";
    4120           0 :                 disk->zoned = true;
    4121           0 :                 disk->zone_size = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    4122           0 :                 disk->max_zone_append_size = spdk_nvme_zns_ctrlr_get_max_zone_append_size(ctrlr) /
    4123           0 :                                              spdk_nvme_ns_get_extended_sector_size(ns);
    4124           0 :                 disk->max_open_zones = spdk_nvme_zns_ns_get_max_open_zones(ns);
    4125           0 :                 disk->max_active_zones = spdk_nvme_zns_ns_get_max_active_zones(ns);
    4126           0 :                 break;
    4127           0 :         default:
    4128           0 :                 SPDK_ERRLOG("unsupported CSI: %u\n", csi);
    4129           0 :                 return -ENOTSUP;
    4130             :         }
    4131             : 
    4132          37 :         nguid = spdk_nvme_ns_get_nguid(ns);
    4133          37 :         if (!nguid) {
    4134          37 :                 uuid = spdk_nvme_ns_get_uuid(ns);
    4135          37 :                 if (uuid) {
    4136          12 :                         disk->uuid = *uuid;
    4137          25 :                 } else if (g_opts.generate_uuids) {
    4138           0 :                         spdk_strcpy_pad(sn_tmp, cdata->sn, SPDK_NVME_CTRLR_SN_LEN, '\0');
    4139           0 :                         rc = nvme_generate_uuid(sn_tmp, spdk_nvme_ns_get_id(ns), &disk->uuid);
    4140           0 :                         if (rc < 0) {
    4141           0 :                                 SPDK_ERRLOG("UUID generation failed (%s)\n", spdk_strerror(-rc));
    4142           0 :                                 return rc;
    4143             :                         }
    4144             :                 }
    4145             :         } else {
    4146           0 :                 memcpy(&disk->uuid, nguid, sizeof(disk->uuid));
    4147             :         }
    4148             : 
    4149          37 :         disk->name = spdk_sprintf_alloc("%sn%d", base_name, spdk_nvme_ns_get_id(ns));
    4150          37 :         if (!disk->name) {
    4151           0 :                 return -ENOMEM;
    4152             :         }
    4153             : 
    4154          37 :         disk->write_cache = 0;
    4155          37 :         if (cdata->vwc.present) {
    4156             :                 /* Enable if the Volatile Write Cache exists */
    4157           0 :                 disk->write_cache = 1;
    4158             :         }
    4159          37 :         if (cdata->oncs.write_zeroes) {
    4160           0 :                 disk->max_write_zeroes = UINT16_MAX + 1;
    4161             :         }
    4162          37 :         disk->blocklen = spdk_nvme_ns_get_extended_sector_size(ns);
    4163          37 :         disk->blockcnt = spdk_nvme_ns_get_num_sectors(ns);
    4164          37 :         disk->max_segment_size = spdk_nvme_ctrlr_get_max_xfer_size(ctrlr);
    4165          37 :         disk->ctratt.raw = cdata->ctratt.raw;
    4166             :         /* NVMe driver will split one request into multiple requests
    4167             :          * based on MDTS and stripe boundary, the bdev layer will use
    4168             :          * max_segment_size and max_num_segments to split one big IO
    4169             :          * into multiple requests, then small request can't run out
    4170             :          * of NVMe internal requests data structure.
    4171             :          */
    4172          37 :         if (opts && opts->io_queue_requests) {
    4173           0 :                 disk->max_num_segments = opts->io_queue_requests / 2;
    4174             :         }
    4175          37 :         if (spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_SGL_SUPPORTED) {
    4176             :                 /* The nvme driver will try to split I/O that have too many
    4177             :                  * SGEs, but it doesn't work if that last SGE doesn't end on
    4178             :                  * an aggregate total that is block aligned. The bdev layer has
    4179             :                  * a more robust splitting framework, so use that instead for
    4180             :                  * this case. (See issue #3269.)
    4181             :                  */
    4182           0 :                 uint16_t max_sges = spdk_nvme_ctrlr_get_max_sges(ctrlr);
    4183             : 
    4184           0 :                 if (disk->max_num_segments == 0) {
    4185           0 :                         disk->max_num_segments = max_sges;
    4186             :                 } else {
    4187           0 :                         disk->max_num_segments = spdk_min(disk->max_num_segments, max_sges);
    4188             :                 }
    4189             :         }
    4190          37 :         disk->optimal_io_boundary = spdk_nvme_ns_get_optimal_io_boundary(ns);
    4191             : 
    4192          37 :         nsdata = spdk_nvme_ns_get_data(ns);
    4193          37 :         bs = spdk_nvme_ns_get_sector_size(ns);
    4194          37 :         atomic_bs = bs;
    4195          37 :         phys_bs = bs;
    4196          37 :         if (nsdata->nabo == 0) {
    4197          37 :                 if (nsdata->nsfeat.ns_atomic_write_unit && nsdata->nawupf) {
    4198           0 :                         atomic_bs = bs * (1 + nsdata->nawupf);
    4199             :                 } else {
    4200          37 :                         atomic_bs = bs * (1 + cdata->awupf);
    4201             :                 }
    4202             :         }
    4203          37 :         if (nsdata->nsfeat.optperf) {
    4204           0 :                 phys_bs = bs * (1 + nsdata->npwg);
    4205             :         }
    4206          37 :         disk->phys_blocklen = spdk_min(phys_bs, atomic_bs);
    4207             : 
    4208          37 :         disk->md_len = spdk_nvme_ns_get_md_size(ns);
    4209          37 :         if (disk->md_len != 0) {
    4210           0 :                 disk->md_interleave = nsdata->flbas.extended;
    4211           0 :                 disk->dif_type = (enum spdk_dif_type)spdk_nvme_ns_get_pi_type(ns);
    4212           0 :                 if (disk->dif_type != SPDK_DIF_DISABLE) {
    4213           0 :                         disk->dif_is_head_of_md = nsdata->dps.md_start;
    4214           0 :                         disk->dif_check_flags = prchk_flags;
    4215             :                 }
    4216             :         }
    4217             : 
    4218          37 :         if (!(spdk_nvme_ctrlr_get_flags(ctrlr) &
    4219             :               SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED)) {
    4220          37 :                 disk->acwu = 0;
    4221           0 :         } else if (nsdata->nsfeat.ns_atomic_write_unit) {
    4222           0 :                 disk->acwu = nsdata->nacwu + 1; /* 0-based */
    4223             :         } else {
    4224           0 :                 disk->acwu = cdata->acwu + 1; /* 0-based */
    4225             :         }
    4226             : 
    4227          37 :         if (cdata->oncs.copy) {
    4228             :                 /* For now bdev interface allows only single segment copy */
    4229           0 :                 disk->max_copy = nsdata->mssrl;
    4230             :         }
    4231             : 
    4232          37 :         disk->ctxt = ctx;
    4233          37 :         disk->fn_table = &nvmelib_fn_table;
    4234          37 :         disk->module = &nvme_if;
    4235             : 
    4236          37 :         return 0;
    4237             : }
    4238             : 
    4239             : static struct nvme_bdev *
    4240          37 : nvme_bdev_alloc(void)
    4241             : {
    4242             :         struct nvme_bdev *bdev;
    4243             :         int rc;
    4244             : 
    4245          37 :         bdev = calloc(1, sizeof(*bdev));
    4246          37 :         if (!bdev) {
    4247           0 :                 SPDK_ERRLOG("bdev calloc() failed\n");
    4248           0 :                 return NULL;
    4249             :         }
    4250             : 
    4251          37 :         if (g_opts.nvme_error_stat) {
    4252           0 :                 bdev->err_stat = calloc(1, sizeof(struct nvme_error_stat));
    4253           0 :                 if (!bdev->err_stat) {
    4254           0 :                         SPDK_ERRLOG("err_stat calloc() failed\n");
    4255           0 :                         free(bdev);
    4256           0 :                         return NULL;
    4257             :                 }
    4258             :         }
    4259             : 
    4260          37 :         rc = pthread_mutex_init(&bdev->mutex, NULL);
    4261          37 :         if (rc != 0) {
    4262           0 :                 free(bdev->err_stat);
    4263           0 :                 free(bdev);
    4264           0 :                 return NULL;
    4265             :         }
    4266             : 
    4267          37 :         bdev->ref = 1;
    4268          37 :         bdev->mp_policy = BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE;
    4269          37 :         bdev->mp_selector = BDEV_NVME_MP_SELECTOR_ROUND_ROBIN;
    4270          37 :         bdev->rr_min_io = UINT32_MAX;
    4271          37 :         TAILQ_INIT(&bdev->nvme_ns_list);
    4272             : 
    4273          37 :         return bdev;
    4274             : }
    4275             : 
    4276             : static int
    4277          37 : nvme_bdev_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4278             : {
    4279             :         struct nvme_bdev *bdev;
    4280          37 :         struct nvme_bdev_ctrlr *nbdev_ctrlr = nvme_ctrlr->nbdev_ctrlr;
    4281             :         int rc;
    4282             : 
    4283          37 :         bdev = nvme_bdev_alloc();
    4284          37 :         if (bdev == NULL) {
    4285           0 :                 SPDK_ERRLOG("Failed to allocate NVMe bdev\n");
    4286           0 :                 return -ENOMEM;
    4287             :         }
    4288             : 
    4289          37 :         bdev->opal = nvme_ctrlr->opal_dev != NULL;
    4290             : 
    4291          37 :         rc = nvme_disk_create(&bdev->disk, nbdev_ctrlr->name, nvme_ctrlr->ctrlr,
    4292             :                               nvme_ns->ns, nvme_ctrlr->opts.prchk_flags, bdev);
    4293          37 :         if (rc != 0) {
    4294           0 :                 SPDK_ERRLOG("Failed to create NVMe disk\n");
    4295           0 :                 nvme_bdev_free(bdev);
    4296           0 :                 return rc;
    4297             :         }
    4298             : 
    4299          37 :         spdk_io_device_register(bdev,
    4300             :                                 bdev_nvme_create_bdev_channel_cb,
    4301             :                                 bdev_nvme_destroy_bdev_channel_cb,
    4302             :                                 sizeof(struct nvme_bdev_channel),
    4303          37 :                                 bdev->disk.name);
    4304             : 
    4305          37 :         nvme_ns->bdev = bdev;
    4306          37 :         bdev->nsid = nvme_ns->id;
    4307          37 :         TAILQ_INSERT_TAIL(&bdev->nvme_ns_list, nvme_ns, tailq);
    4308             : 
    4309          37 :         bdev->nbdev_ctrlr = nbdev_ctrlr;
    4310          37 :         TAILQ_INSERT_TAIL(&nbdev_ctrlr->bdevs, bdev, tailq);
    4311             : 
    4312          37 :         rc = spdk_bdev_register(&bdev->disk);
    4313          37 :         if (rc != 0) {
    4314           1 :                 SPDK_ERRLOG("spdk_bdev_register() failed\n");
    4315           1 :                 spdk_io_device_unregister(bdev, NULL);
    4316           1 :                 nvme_ns->bdev = NULL;
    4317           1 :                 TAILQ_REMOVE(&nbdev_ctrlr->bdevs, bdev, tailq);
    4318           1 :                 nvme_bdev_free(bdev);
    4319           1 :                 return rc;
    4320             :         }
    4321             : 
    4322          36 :         return 0;
    4323             : }
    4324             : 
    4325             : static bool
    4326          23 : bdev_nvme_compare_ns(struct spdk_nvme_ns *ns1, struct spdk_nvme_ns *ns2)
    4327             : {
    4328             :         const struct spdk_nvme_ns_data *nsdata1, *nsdata2;
    4329             :         const struct spdk_uuid *uuid1, *uuid2;
    4330             : 
    4331          23 :         nsdata1 = spdk_nvme_ns_get_data(ns1);
    4332          23 :         nsdata2 = spdk_nvme_ns_get_data(ns2);
    4333          23 :         uuid1 = spdk_nvme_ns_get_uuid(ns1);
    4334          23 :         uuid2 = spdk_nvme_ns_get_uuid(ns2);
    4335             : 
    4336          45 :         return memcmp(nsdata1->nguid, nsdata2->nguid, sizeof(nsdata1->nguid)) == 0 &&
    4337          22 :                nsdata1->eui64 == nsdata2->eui64 &&
    4338          21 :                ((uuid1 == NULL && uuid2 == NULL) ||
    4339          59 :                 (uuid1 != NULL && uuid2 != NULL && spdk_uuid_compare(uuid1, uuid2) == 0)) &&
    4340          18 :                spdk_nvme_ns_get_csi(ns1) == spdk_nvme_ns_get_csi(ns2);
    4341             : }
    4342             : 
    4343             : static bool
    4344           0 : hotplug_probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    4345             :                  struct spdk_nvme_ctrlr_opts *opts)
    4346             : {
    4347             :         struct nvme_probe_skip_entry *entry;
    4348             : 
    4349           0 :         TAILQ_FOREACH(entry, &g_skipped_nvme_ctrlrs, tailq) {
    4350           0 :                 if (spdk_nvme_transport_id_compare(trid, &entry->trid) == 0) {
    4351           0 :                         return false;
    4352             :                 }
    4353             :         }
    4354             : 
    4355           0 :         opts->arbitration_burst = (uint8_t)g_opts.arbitration_burst;
    4356           0 :         opts->low_priority_weight = (uint8_t)g_opts.low_priority_weight;
    4357           0 :         opts->medium_priority_weight = (uint8_t)g_opts.medium_priority_weight;
    4358           0 :         opts->high_priority_weight = (uint8_t)g_opts.high_priority_weight;
    4359           0 :         opts->disable_read_ana_log_page = true;
    4360             : 
    4361           0 :         SPDK_DEBUGLOG(bdev_nvme, "Attaching to %s\n", trid->traddr);
    4362             : 
    4363           0 :         return true;
    4364             : }
    4365             : 
    4366             : static void
    4367           0 : nvme_abort_cpl(void *ctx, const struct spdk_nvme_cpl *cpl)
    4368             : {
    4369           0 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    4370             : 
    4371           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    4372           0 :                 SPDK_WARNLOG("Abort failed. Resetting controller. sc is %u, sct is %u.\n", cpl->status.sc,
    4373             :                              cpl->status.sct);
    4374           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4375           0 :         } else if (cpl->cdw0 & 0x1) {
    4376           0 :                 SPDK_WARNLOG("Specified command could not be aborted.\n");
    4377           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4378             :         }
    4379           0 : }
    4380             : 
    4381             : static void
    4382           0 : timeout_cb(void *cb_arg, struct spdk_nvme_ctrlr *ctrlr,
    4383             :            struct spdk_nvme_qpair *qpair, uint16_t cid)
    4384             : {
    4385           0 :         struct nvme_ctrlr *nvme_ctrlr = cb_arg;
    4386             :         union spdk_nvme_csts_register csts;
    4387             :         int rc;
    4388             : 
    4389           0 :         assert(nvme_ctrlr->ctrlr == ctrlr);
    4390             : 
    4391           0 :         SPDK_WARNLOG("Warning: Detected a timeout. ctrlr=%p qpair=%p cid=%u\n", ctrlr, qpair, cid);
    4392             : 
    4393             :         /* Only try to read CSTS if it's a PCIe controller or we have a timeout on an I/O
    4394             :          * queue.  (Note: qpair == NULL when there's an admin cmd timeout.)  Otherwise we
    4395             :          * would submit another fabrics cmd on the admin queue to read CSTS and check for its
    4396             :          * completion recursively.
    4397             :          */
    4398           0 :         if (nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE || qpair != NULL) {
    4399           0 :                 csts = spdk_nvme_ctrlr_get_regs_csts(ctrlr);
    4400           0 :                 if (csts.bits.cfs) {
    4401           0 :                         SPDK_ERRLOG("Controller Fatal Status, reset required\n");
    4402           0 :                         bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4403           0 :                         return;
    4404             :                 }
    4405             :         }
    4406             : 
    4407           0 :         switch (g_opts.action_on_timeout) {
    4408           0 :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_ABORT:
    4409           0 :                 if (qpair) {
    4410             :                         /* Don't send abort to ctrlr when ctrlr is not available. */
    4411           0 :                         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4412           0 :                         if (!nvme_ctrlr_is_available(nvme_ctrlr)) {
    4413           0 :                                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4414           0 :                                 SPDK_NOTICELOG("Quit abort. Ctrlr is not available.\n");
    4415           0 :                                 return;
    4416             :                         }
    4417           0 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4418             : 
    4419           0 :                         rc = spdk_nvme_ctrlr_cmd_abort(ctrlr, qpair, cid,
    4420             :                                                        nvme_abort_cpl, nvme_ctrlr);
    4421           0 :                         if (rc == 0) {
    4422           0 :                                 return;
    4423             :                         }
    4424             : 
    4425           0 :                         SPDK_ERRLOG("Unable to send abort. Resetting, rc is %d.\n", rc);
    4426             :                 }
    4427             : 
    4428             :         /* FALLTHROUGH */
    4429             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET:
    4430           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4431           0 :                 break;
    4432           0 :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE:
    4433           0 :                 SPDK_DEBUGLOG(bdev_nvme, "No action for nvme controller timeout.\n");
    4434           0 :                 break;
    4435           0 :         default:
    4436           0 :                 SPDK_ERRLOG("An invalid timeout action value is found.\n");
    4437           0 :                 break;
    4438             :         }
    4439             : }
    4440             : 
    4441             : static struct nvme_ns *
    4442          50 : nvme_ns_alloc(void)
    4443             : {
    4444             :         struct nvme_ns *nvme_ns;
    4445             : 
    4446          50 :         nvme_ns = calloc(1, sizeof(struct nvme_ns));
    4447          50 :         if (nvme_ns == NULL) {
    4448           0 :                 return NULL;
    4449             :         }
    4450             : 
    4451          50 :         if (g_opts.io_path_stat) {
    4452           0 :                 nvme_ns->stat = calloc(1, sizeof(struct spdk_bdev_io_stat));
    4453           0 :                 if (nvme_ns->stat == NULL) {
    4454           0 :                         free(nvme_ns);
    4455           0 :                         return NULL;
    4456             :                 }
    4457           0 :                 spdk_bdev_reset_io_stat(nvme_ns->stat, SPDK_BDEV_RESET_STAT_MAXMIN);
    4458             :         }
    4459             : 
    4460          50 :         return nvme_ns;
    4461             : }
    4462             : 
    4463             : static void
    4464          50 : nvme_ns_free(struct nvme_ns *nvme_ns)
    4465             : {
    4466          50 :         free(nvme_ns->stat);
    4467          50 :         free(nvme_ns);
    4468          50 : }
    4469             : 
    4470             : static void
    4471          50 : nvme_ctrlr_populate_namespace_done(struct nvme_ns *nvme_ns, int rc)
    4472             : {
    4473          50 :         struct nvme_ctrlr *nvme_ctrlr = nvme_ns->ctrlr;
    4474          50 :         struct nvme_async_probe_ctx *ctx = nvme_ns->probe_ctx;
    4475             : 
    4476          50 :         if (rc == 0) {
    4477          48 :                 nvme_ns->probe_ctx = NULL;
    4478          48 :                 pthread_mutex_lock(&nvme_ctrlr->mutex);
    4479          48 :                 nvme_ctrlr->ref++;
    4480          48 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4481             :         } else {
    4482           2 :                 RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4483           2 :                 nvme_ns_free(nvme_ns);
    4484             :         }
    4485             : 
    4486          50 :         if (ctx) {
    4487          49 :                 ctx->populates_in_progress--;
    4488          49 :                 if (ctx->populates_in_progress == 0) {
    4489          12 :                         nvme_ctrlr_populate_namespaces_done(nvme_ctrlr, ctx);
    4490             :                 }
    4491             :         }
    4492          50 : }
    4493             : 
    4494             : static void
    4495           2 : bdev_nvme_add_io_path(struct spdk_io_channel_iter *i)
    4496             : {
    4497           2 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    4498           2 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(_ch);
    4499           2 :         struct nvme_ns *nvme_ns = spdk_io_channel_iter_get_ctx(i);
    4500             :         int rc;
    4501             : 
    4502           2 :         rc = _bdev_nvme_add_io_path(nbdev_ch, nvme_ns);
    4503           2 :         if (rc != 0) {
    4504           0 :                 SPDK_ERRLOG("Failed to add I/O path to bdev_channel dynamically.\n");
    4505             :         }
    4506             : 
    4507           2 :         spdk_for_each_channel_continue(i, rc);
    4508           2 : }
    4509             : 
    4510             : static void
    4511           2 : bdev_nvme_delete_io_path(struct spdk_io_channel_iter *i)
    4512             : {
    4513           2 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    4514           2 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(_ch);
    4515           2 :         struct nvme_ns *nvme_ns = spdk_io_channel_iter_get_ctx(i);
    4516             :         struct nvme_io_path *io_path;
    4517             : 
    4518           2 :         io_path = _bdev_nvme_get_io_path(nbdev_ch, nvme_ns);
    4519           2 :         if (io_path != NULL) {
    4520           2 :                 _bdev_nvme_delete_io_path(nbdev_ch, io_path);
    4521             :         }
    4522             : 
    4523           2 :         spdk_for_each_channel_continue(i, 0);
    4524           2 : }
    4525             : 
    4526             : static void
    4527           0 : bdev_nvme_add_io_path_failed(struct spdk_io_channel_iter *i, int status)
    4528             : {
    4529           0 :         struct nvme_ns *nvme_ns = spdk_io_channel_iter_get_ctx(i);
    4530             : 
    4531           0 :         nvme_ctrlr_populate_namespace_done(nvme_ns, -1);
    4532           0 : }
    4533             : 
    4534             : static void
    4535          12 : bdev_nvme_add_io_path_done(struct spdk_io_channel_iter *i, int status)
    4536             : {
    4537          12 :         struct nvme_ns *nvme_ns = spdk_io_channel_iter_get_ctx(i);
    4538          12 :         struct nvme_bdev *bdev = spdk_io_channel_iter_get_io_device(i);
    4539             : 
    4540          12 :         if (status == 0) {
    4541          12 :                 nvme_ctrlr_populate_namespace_done(nvme_ns, 0);
    4542             :         } else {
    4543             :                 /* Delete the added io_paths and fail populating the namespace. */
    4544           0 :                 spdk_for_each_channel(bdev,
    4545             :                                       bdev_nvme_delete_io_path,
    4546             :                                       nvme_ns,
    4547             :                                       bdev_nvme_add_io_path_failed);
    4548             :         }
    4549          12 : }
    4550             : 
    4551             : static int
    4552          13 : nvme_bdev_add_ns(struct nvme_bdev *bdev, struct nvme_ns *nvme_ns)
    4553             : {
    4554             :         struct nvme_ns *tmp_ns;
    4555             :         const struct spdk_nvme_ns_data *nsdata;
    4556             : 
    4557          13 :         nsdata = spdk_nvme_ns_get_data(nvme_ns->ns);
    4558          13 :         if (!nsdata->nmic.can_share) {
    4559           0 :                 SPDK_ERRLOG("Namespace cannot be shared.\n");
    4560           0 :                 return -EINVAL;
    4561             :         }
    4562             : 
    4563          13 :         pthread_mutex_lock(&bdev->mutex);
    4564             : 
    4565          13 :         tmp_ns = TAILQ_FIRST(&bdev->nvme_ns_list);
    4566          13 :         assert(tmp_ns != NULL);
    4567             : 
    4568          13 :         if (tmp_ns->ns != NULL && !bdev_nvme_compare_ns(nvme_ns->ns, tmp_ns->ns)) {
    4569           1 :                 pthread_mutex_unlock(&bdev->mutex);
    4570           1 :                 SPDK_ERRLOG("Namespaces are not identical.\n");
    4571           1 :                 return -EINVAL;
    4572             :         }
    4573             : 
    4574          12 :         bdev->ref++;
    4575          12 :         TAILQ_INSERT_TAIL(&bdev->nvme_ns_list, nvme_ns, tailq);
    4576          12 :         nvme_ns->bdev = bdev;
    4577             : 
    4578          12 :         pthread_mutex_unlock(&bdev->mutex);
    4579             : 
    4580             :         /* Add nvme_io_path to nvme_bdev_channels dynamically. */
    4581          12 :         spdk_for_each_channel(bdev,
    4582             :                               bdev_nvme_add_io_path,
    4583             :                               nvme_ns,
    4584             :                               bdev_nvme_add_io_path_done);
    4585             : 
    4586          12 :         return 0;
    4587             : }
    4588             : 
    4589             : static void
    4590          50 : nvme_ctrlr_populate_namespace(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4591             : {
    4592             :         struct spdk_nvme_ns     *ns;
    4593             :         struct nvme_bdev        *bdev;
    4594          50 :         int                     rc = 0;
    4595             : 
    4596          50 :         ns = spdk_nvme_ctrlr_get_ns(nvme_ctrlr->ctrlr, nvme_ns->id);
    4597          50 :         if (!ns) {
    4598           0 :                 SPDK_DEBUGLOG(bdev_nvme, "Invalid NS %d\n", nvme_ns->id);
    4599           0 :                 rc = -EINVAL;
    4600           0 :                 goto done;
    4601             :         }
    4602             : 
    4603          50 :         nvme_ns->ns = ns;
    4604          50 :         nvme_ns->ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
    4605             : 
    4606          50 :         if (nvme_ctrlr->ana_log_page != NULL) {
    4607          37 :                 bdev_nvme_parse_ana_log_page(nvme_ctrlr, nvme_ns_set_ana_state, nvme_ns);
    4608             :         }
    4609             : 
    4610          50 :         bdev = nvme_bdev_ctrlr_get_bdev(nvme_ctrlr->nbdev_ctrlr, nvme_ns->id);
    4611          50 :         if (bdev == NULL) {
    4612          37 :                 rc = nvme_bdev_create(nvme_ctrlr, nvme_ns);
    4613             :         } else {
    4614          13 :                 rc = nvme_bdev_add_ns(bdev, nvme_ns);
    4615          13 :                 if (rc == 0) {
    4616          12 :                         return;
    4617             :                 }
    4618             :         }
    4619           1 : done:
    4620          38 :         nvme_ctrlr_populate_namespace_done(nvme_ns, rc);
    4621             : }
    4622             : 
    4623             : static void
    4624          48 : nvme_ctrlr_depopulate_namespace_done(struct nvme_ns *nvme_ns)
    4625             : {
    4626          48 :         struct nvme_ctrlr *nvme_ctrlr = nvme_ns->ctrlr;
    4627             : 
    4628          48 :         assert(nvme_ctrlr != NULL);
    4629             : 
    4630          48 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4631             : 
    4632          48 :         RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4633             : 
    4634          48 :         if (nvme_ns->bdev != NULL) {
    4635           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4636           0 :                 return;
    4637             :         }
    4638             : 
    4639          48 :         nvme_ns_free(nvme_ns);
    4640          48 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4641             : 
    4642          48 :         nvme_ctrlr_release(nvme_ctrlr);
    4643             : }
    4644             : 
    4645             : static void
    4646          11 : bdev_nvme_delete_io_path_done(struct spdk_io_channel_iter *i, int status)
    4647             : {
    4648          11 :         struct nvme_ns *nvme_ns = spdk_io_channel_iter_get_ctx(i);
    4649             : 
    4650          11 :         nvme_ctrlr_depopulate_namespace_done(nvme_ns);
    4651          11 : }
    4652             : 
    4653             : static void
    4654          48 : nvme_ctrlr_depopulate_namespace(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4655             : {
    4656             :         struct nvme_bdev *bdev;
    4657             : 
    4658          48 :         spdk_poller_unregister(&nvme_ns->anatt_timer);
    4659             : 
    4660          48 :         bdev = nvme_ns->bdev;
    4661          48 :         if (bdev != NULL) {
    4662          44 :                 pthread_mutex_lock(&bdev->mutex);
    4663             : 
    4664          44 :                 assert(bdev->ref > 0);
    4665          44 :                 bdev->ref--;
    4666          44 :                 if (bdev->ref == 0) {
    4667          33 :                         pthread_mutex_unlock(&bdev->mutex);
    4668             : 
    4669          33 :                         spdk_bdev_unregister(&bdev->disk, NULL, NULL);
    4670             :                 } else {
    4671             :                         /* spdk_bdev_unregister() is not called until the last nvme_ns is
    4672             :                          * depopulated. Hence we need to remove nvme_ns from bdev->nvme_ns_list
    4673             :                          * and clear nvme_ns->bdev here.
    4674             :                          */
    4675          11 :                         TAILQ_REMOVE(&bdev->nvme_ns_list, nvme_ns, tailq);
    4676          11 :                         nvme_ns->bdev = NULL;
    4677             : 
    4678          11 :                         pthread_mutex_unlock(&bdev->mutex);
    4679             : 
    4680             :                         /* Delete nvme_io_paths from nvme_bdev_channels dynamically. After that,
    4681             :                          * we call depopulate_namespace_done() to avoid use-after-free.
    4682             :                          */
    4683          11 :                         spdk_for_each_channel(bdev,
    4684             :                                               bdev_nvme_delete_io_path,
    4685             :                                               nvme_ns,
    4686             :                                               bdev_nvme_delete_io_path_done);
    4687          11 :                         return;
    4688             :                 }
    4689             :         }
    4690             : 
    4691          37 :         nvme_ctrlr_depopulate_namespace_done(nvme_ns);
    4692             : }
    4693             : 
    4694             : static void
    4695          61 : nvme_ctrlr_populate_namespaces(struct nvme_ctrlr *nvme_ctrlr,
    4696             :                                struct nvme_async_probe_ctx *ctx)
    4697             : {
    4698          61 :         struct spdk_nvme_ctrlr  *ctrlr = nvme_ctrlr->ctrlr;
    4699             :         struct nvme_ns  *nvme_ns, *next;
    4700             :         struct spdk_nvme_ns     *ns;
    4701             :         struct nvme_bdev        *bdev;
    4702             :         uint32_t                nsid;
    4703             :         int                     rc;
    4704             :         uint64_t                num_sectors;
    4705             : 
    4706          61 :         if (ctx) {
    4707             :                 /* Initialize this count to 1 to handle the populate functions
    4708             :                  * calling nvme_ctrlr_populate_namespace_done() immediately.
    4709             :                  */
    4710          45 :                 ctx->populates_in_progress = 1;
    4711             :         }
    4712             : 
    4713             :         /* First loop over our existing namespaces and see if they have been
    4714             :          * removed. */
    4715          61 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    4716          65 :         while (nvme_ns != NULL) {
    4717           4 :                 next = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    4718             : 
    4719           4 :                 if (spdk_nvme_ctrlr_is_active_ns(ctrlr, nvme_ns->id)) {
    4720             :                         /* NS is still there or added again. Its attributes may have changed. */
    4721           3 :                         ns = spdk_nvme_ctrlr_get_ns(ctrlr, nvme_ns->id);
    4722           3 :                         if (nvme_ns->ns != ns) {
    4723           1 :                                 assert(nvme_ns->ns == NULL);
    4724           1 :                                 nvme_ns->ns = ns;
    4725           1 :                                 SPDK_DEBUGLOG(bdev_nvme, "NSID %u was added\n", nvme_ns->id);
    4726             :                         }
    4727             : 
    4728           3 :                         num_sectors = spdk_nvme_ns_get_num_sectors(ns);
    4729           3 :                         bdev = nvme_ns->bdev;
    4730           3 :                         assert(bdev != NULL);
    4731           3 :                         if (bdev->disk.blockcnt != num_sectors) {
    4732           1 :                                 SPDK_NOTICELOG("NSID %u is resized: bdev name %s, old size %" PRIu64 ", new size %" PRIu64 "\n",
    4733             :                                                nvme_ns->id,
    4734             :                                                bdev->disk.name,
    4735             :                                                bdev->disk.blockcnt,
    4736             :                                                num_sectors);
    4737           1 :                                 rc = spdk_bdev_notify_blockcnt_change(&bdev->disk, num_sectors);
    4738           1 :                                 if (rc != 0) {
    4739           0 :                                         SPDK_ERRLOG("Could not change num blocks for nvme bdev: name %s, errno: %d.\n",
    4740             :                                                     bdev->disk.name, rc);
    4741             :                                 }
    4742             :                         }
    4743             :                 } else {
    4744             :                         /* Namespace was removed */
    4745           1 :                         nvme_ctrlr_depopulate_namespace(nvme_ctrlr, nvme_ns);
    4746             :                 }
    4747             : 
    4748           4 :                 nvme_ns = next;
    4749             :         }
    4750             : 
    4751             :         /* Loop through all of the namespaces at the nvme level and see if any of them are new */
    4752          61 :         nsid = spdk_nvme_ctrlr_get_first_active_ns(ctrlr);
    4753         114 :         while (nsid != 0) {
    4754          53 :                 nvme_ns = nvme_ctrlr_get_ns(nvme_ctrlr, nsid);
    4755             : 
    4756          53 :                 if (nvme_ns == NULL) {
    4757             :                         /* Found a new one */
    4758          50 :                         nvme_ns = nvme_ns_alloc();
    4759          50 :                         if (nvme_ns == NULL) {
    4760           0 :                                 SPDK_ERRLOG("Failed to allocate namespace\n");
    4761             :                                 /* This just fails to attach the namespace. It may work on a future attempt. */
    4762           0 :                                 continue;
    4763             :                         }
    4764             : 
    4765          50 :                         nvme_ns->id = nsid;
    4766          50 :                         nvme_ns->ctrlr = nvme_ctrlr;
    4767             : 
    4768          50 :                         nvme_ns->bdev = NULL;
    4769             : 
    4770          50 :                         if (ctx) {
    4771          49 :                                 ctx->populates_in_progress++;
    4772             :                         }
    4773          50 :                         nvme_ns->probe_ctx = ctx;
    4774             : 
    4775          50 :                         RB_INSERT(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4776             : 
    4777          50 :                         nvme_ctrlr_populate_namespace(nvme_ctrlr, nvme_ns);
    4778             :                 }
    4779             : 
    4780          53 :                 nsid = spdk_nvme_ctrlr_get_next_active_ns(ctrlr, nsid);
    4781             :         }
    4782             : 
    4783          61 :         if (ctx) {
    4784             :                 /* Decrement this count now that the loop is over to account
    4785             :                  * for the one we started with.  If the count is then 0, we
    4786             :                  * know any populate_namespace functions completed immediately,
    4787             :                  * so we'll kick the callback here.
    4788             :                  */
    4789          45 :                 ctx->populates_in_progress--;
    4790          45 :                 if (ctx->populates_in_progress == 0) {
    4791          33 :                         nvme_ctrlr_populate_namespaces_done(nvme_ctrlr, ctx);
    4792             :                 }
    4793             :         }
    4794             : 
    4795          61 : }
    4796             : 
    4797             : static void
    4798          59 : nvme_ctrlr_depopulate_namespaces(struct nvme_ctrlr *nvme_ctrlr)
    4799             : {
    4800             :         struct nvme_ns *nvme_ns, *tmp;
    4801             : 
    4802         106 :         RB_FOREACH_SAFE(nvme_ns, nvme_ns_tree, &nvme_ctrlr->namespaces, tmp) {
    4803          47 :                 nvme_ctrlr_depopulate_namespace(nvme_ctrlr, nvme_ns);
    4804             :         }
    4805          59 : }
    4806             : 
    4807             : static uint32_t
    4808          36 : nvme_ctrlr_get_ana_log_page_size(struct nvme_ctrlr *nvme_ctrlr)
    4809             : {
    4810          36 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    4811             :         const struct spdk_nvme_ctrlr_data *cdata;
    4812          36 :         uint32_t nsid, ns_count = 0;
    4813             : 
    4814          36 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    4815             : 
    4816          80 :         for (nsid = spdk_nvme_ctrlr_get_first_active_ns(ctrlr);
    4817          44 :              nsid != 0; nsid = spdk_nvme_ctrlr_get_next_active_ns(ctrlr, nsid)) {
    4818          44 :                 ns_count++;
    4819             :         }
    4820             : 
    4821          36 :         return sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
    4822          36 :                sizeof(struct spdk_nvme_ana_group_descriptor) + ns_count *
    4823             :                sizeof(uint32_t);
    4824             : }
    4825             : 
    4826             : static int
    4827           6 : nvme_ctrlr_set_ana_states(const struct spdk_nvme_ana_group_descriptor *desc,
    4828             :                           void *cb_arg)
    4829             : {
    4830           6 :         struct nvme_ctrlr *nvme_ctrlr = cb_arg;
    4831             :         struct nvme_ns *nvme_ns;
    4832             :         uint32_t i, nsid;
    4833             : 
    4834          11 :         for (i = 0; i < desc->num_of_nsid; i++) {
    4835           5 :                 nsid = desc->nsid[i];
    4836           5 :                 if (nsid == 0) {
    4837           0 :                         continue;
    4838             :                 }
    4839             : 
    4840           5 :                 nvme_ns = nvme_ctrlr_get_ns(nvme_ctrlr, nsid);
    4841             : 
    4842           5 :                 assert(nvme_ns != NULL);
    4843           5 :                 if (nvme_ns == NULL) {
    4844             :                         /* Target told us that an inactive namespace had an ANA change */
    4845           0 :                         continue;
    4846             :                 }
    4847             : 
    4848           5 :                 _nvme_ns_set_ana_state(nvme_ns, desc);
    4849             :         }
    4850             : 
    4851           6 :         return 0;
    4852             : }
    4853             : 
    4854             : static void
    4855           0 : bdev_nvme_disable_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr)
    4856             : {
    4857             :         struct nvme_ns *nvme_ns;
    4858             : 
    4859           0 :         spdk_free(nvme_ctrlr->ana_log_page);
    4860           0 :         nvme_ctrlr->ana_log_page = NULL;
    4861             : 
    4862           0 :         for (nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    4863             :              nvme_ns != NULL;
    4864           0 :              nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns)) {
    4865           0 :                 nvme_ns->ana_state_updating = false;
    4866           0 :                 nvme_ns->ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
    4867             :         }
    4868           0 : }
    4869             : 
    4870             : static void
    4871           3 : nvme_ctrlr_read_ana_log_page_done(void *ctx, const struct spdk_nvme_cpl *cpl)
    4872             : {
    4873           3 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    4874             : 
    4875           3 :         if (cpl != NULL && spdk_nvme_cpl_is_success(cpl)) {
    4876           3 :                 bdev_nvme_parse_ana_log_page(nvme_ctrlr, nvme_ctrlr_set_ana_states,
    4877             :                                              nvme_ctrlr);
    4878             :         } else {
    4879           0 :                 bdev_nvme_disable_read_ana_log_page(nvme_ctrlr);
    4880             :         }
    4881             : 
    4882           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4883             : 
    4884           3 :         assert(nvme_ctrlr->ana_log_page_updating == true);
    4885           3 :         nvme_ctrlr->ana_log_page_updating = false;
    4886             : 
    4887           3 :         if (nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    4888           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4889             : 
    4890           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    4891             :         } else {
    4892           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4893             : 
    4894           3 :                 bdev_nvme_clear_io_path_caches(nvme_ctrlr);
    4895             :         }
    4896           3 : }
    4897             : 
    4898             : static int
    4899           6 : nvme_ctrlr_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr)
    4900             : {
    4901             :         uint32_t ana_log_page_size;
    4902             :         int rc;
    4903             : 
    4904           6 :         if (nvme_ctrlr->ana_log_page == NULL) {
    4905           0 :                 return -EINVAL;
    4906             :         }
    4907             : 
    4908           6 :         ana_log_page_size = nvme_ctrlr_get_ana_log_page_size(nvme_ctrlr);
    4909             : 
    4910           6 :         if (ana_log_page_size > nvme_ctrlr->max_ana_log_page_size) {
    4911           0 :                 SPDK_ERRLOG("ANA log page size %" PRIu32 " is larger than allowed %" PRIu32 "\n",
    4912             :                             ana_log_page_size, nvme_ctrlr->max_ana_log_page_size);
    4913           0 :                 return -EINVAL;
    4914             :         }
    4915             : 
    4916           6 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4917           6 :         if (!nvme_ctrlr_is_available(nvme_ctrlr) ||
    4918             :             nvme_ctrlr->ana_log_page_updating) {
    4919           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4920           3 :                 return -EBUSY;
    4921             :         }
    4922             : 
    4923           3 :         nvme_ctrlr->ana_log_page_updating = true;
    4924           3 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4925             : 
    4926           3 :         rc = spdk_nvme_ctrlr_cmd_get_log_page(nvme_ctrlr->ctrlr,
    4927             :                                               SPDK_NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS,
    4928             :                                               SPDK_NVME_GLOBAL_NS_TAG,
    4929           3 :                                               nvme_ctrlr->ana_log_page,
    4930             :                                               ana_log_page_size, 0,
    4931             :                                               nvme_ctrlr_read_ana_log_page_done,
    4932             :                                               nvme_ctrlr);
    4933           3 :         if (rc != 0) {
    4934           0 :                 nvme_ctrlr_read_ana_log_page_done(nvme_ctrlr, NULL);
    4935             :         }
    4936             : 
    4937           3 :         return rc;
    4938             : }
    4939             : 
    4940             : static void
    4941           0 : dummy_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
    4942             : {
    4943           0 : }
    4944             : 
    4945             : struct bdev_nvme_set_preferred_path_ctx {
    4946             :         struct spdk_bdev_desc *desc;
    4947             :         struct nvme_ns *nvme_ns;
    4948             :         bdev_nvme_set_preferred_path_cb cb_fn;
    4949             :         void *cb_arg;
    4950             : };
    4951             : 
    4952             : static void
    4953           3 : bdev_nvme_set_preferred_path_done(struct spdk_io_channel_iter *i, int status)
    4954             : {
    4955           3 :         struct bdev_nvme_set_preferred_path_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    4956             : 
    4957           3 :         assert(ctx != NULL);
    4958           3 :         assert(ctx->desc != NULL);
    4959           3 :         assert(ctx->cb_fn != NULL);
    4960             : 
    4961           3 :         spdk_bdev_close(ctx->desc);
    4962             : 
    4963           3 :         ctx->cb_fn(ctx->cb_arg, status);
    4964             : 
    4965           3 :         free(ctx);
    4966           3 : }
    4967             : 
    4968             : static void
    4969           2 : _bdev_nvme_set_preferred_path(struct spdk_io_channel_iter *i)
    4970             : {
    4971           2 :         struct bdev_nvme_set_preferred_path_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    4972           2 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    4973           2 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(_ch);
    4974             :         struct nvme_io_path *io_path, *prev;
    4975             : 
    4976           2 :         prev = NULL;
    4977           3 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    4978           3 :                 if (io_path->nvme_ns == ctx->nvme_ns) {
    4979           2 :                         break;
    4980             :                 }
    4981           1 :                 prev = io_path;
    4982             :         }
    4983             : 
    4984           2 :         if (io_path != NULL) {
    4985           2 :                 if (prev != NULL) {
    4986           1 :                         STAILQ_REMOVE_AFTER(&nbdev_ch->io_path_list, prev, stailq);
    4987           1 :                         STAILQ_INSERT_HEAD(&nbdev_ch->io_path_list, io_path, stailq);
    4988             :                 }
    4989             : 
    4990             :                 /* We can set io_path to nbdev_ch->current_io_path directly here.
    4991             :                  * However, it needs to be conditional. To simplify the code,
    4992             :                  * just clear nbdev_ch->current_io_path and let find_io_path()
    4993             :                  * fill it.
    4994             :                  *
    4995             :                  * Automatic failback may be disabled. Hence even if the io_path is
    4996             :                  * already at the head, clear nbdev_ch->current_io_path.
    4997             :                  */
    4998           2 :                 bdev_nvme_clear_current_io_path(nbdev_ch);
    4999             :         }
    5000             : 
    5001           2 :         spdk_for_each_channel_continue(i, 0);
    5002           2 : }
    5003             : 
    5004             : static struct nvme_ns *
    5005           3 : bdev_nvme_set_preferred_ns(struct nvme_bdev *nbdev, uint16_t cntlid)
    5006             : {
    5007             :         struct nvme_ns *nvme_ns, *prev;
    5008             :         const struct spdk_nvme_ctrlr_data *cdata;
    5009             : 
    5010           3 :         prev = NULL;
    5011           6 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
    5012           6 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ns->ctrlr->ctrlr);
    5013             : 
    5014           6 :                 if (cdata->cntlid == cntlid) {
    5015           3 :                         break;
    5016             :                 }
    5017           3 :                 prev = nvme_ns;
    5018             :         }
    5019             : 
    5020           3 :         if (nvme_ns != NULL && prev != NULL) {
    5021           2 :                 TAILQ_REMOVE(&nbdev->nvme_ns_list, nvme_ns, tailq);
    5022           2 :                 TAILQ_INSERT_HEAD(&nbdev->nvme_ns_list, nvme_ns, tailq);
    5023             :         }
    5024             : 
    5025           3 :         return nvme_ns;
    5026             : }
    5027             : 
    5028             : /* This function supports only multipath mode. There is only a single I/O path
    5029             :  * for each NVMe-oF controller. Hence, just move the matched I/O path to the
    5030             :  * head of the I/O path list for each NVMe bdev channel.
    5031             :  *
    5032             :  * NVMe bdev channel may be acquired after completing this function. move the
    5033             :  * matched namespace to the head of the namespace list for the NVMe bdev too.
    5034             :  */
    5035             : void
    5036           3 : bdev_nvme_set_preferred_path(const char *name, uint16_t cntlid,
    5037             :                              bdev_nvme_set_preferred_path_cb cb_fn, void *cb_arg)
    5038             : {
    5039             :         struct bdev_nvme_set_preferred_path_ctx *ctx;
    5040             :         struct spdk_bdev *bdev;
    5041             :         struct nvme_bdev *nbdev;
    5042           3 :         int rc = 0;
    5043             : 
    5044           3 :         assert(cb_fn != NULL);
    5045             : 
    5046           3 :         ctx = calloc(1, sizeof(*ctx));
    5047           3 :         if (ctx == NULL) {
    5048           0 :                 SPDK_ERRLOG("Failed to alloc context.\n");
    5049           0 :                 rc = -ENOMEM;
    5050           0 :                 goto err_alloc;
    5051             :         }
    5052             : 
    5053           3 :         ctx->cb_fn = cb_fn;
    5054           3 :         ctx->cb_arg = cb_arg;
    5055             : 
    5056           3 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &ctx->desc);
    5057           3 :         if (rc != 0) {
    5058           0 :                 SPDK_ERRLOG("Failed to open bdev %s.\n", name);
    5059           0 :                 goto err_open;
    5060             :         }
    5061             : 
    5062           3 :         bdev = spdk_bdev_desc_get_bdev(ctx->desc);
    5063             : 
    5064           3 :         if (bdev->module != &nvme_if) {
    5065           0 :                 SPDK_ERRLOG("bdev %s is not registered in this module.\n", name);
    5066           0 :                 rc = -ENODEV;
    5067           0 :                 goto err_bdev;
    5068             :         }
    5069             : 
    5070           3 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    5071             : 
    5072           3 :         pthread_mutex_lock(&nbdev->mutex);
    5073             : 
    5074           3 :         ctx->nvme_ns = bdev_nvme_set_preferred_ns(nbdev, cntlid);
    5075           3 :         if (ctx->nvme_ns == NULL) {
    5076           0 :                 pthread_mutex_unlock(&nbdev->mutex);
    5077             : 
    5078           0 :                 SPDK_ERRLOG("bdev %s does not have namespace to controller %u.\n", name, cntlid);
    5079           0 :                 rc = -ENODEV;
    5080           0 :                 goto err_bdev;
    5081             :         }
    5082             : 
    5083           3 :         pthread_mutex_unlock(&nbdev->mutex);
    5084             : 
    5085           3 :         spdk_for_each_channel(nbdev,
    5086             :                               _bdev_nvme_set_preferred_path,
    5087             :                               ctx,
    5088             :                               bdev_nvme_set_preferred_path_done);
    5089           3 :         return;
    5090             : 
    5091           0 : err_bdev:
    5092           0 :         spdk_bdev_close(ctx->desc);
    5093           0 : err_open:
    5094           0 :         free(ctx);
    5095           0 : err_alloc:
    5096           0 :         cb_fn(cb_arg, rc);
    5097             : }
    5098             : 
    5099             : struct bdev_nvme_set_multipath_policy_ctx {
    5100             :         struct spdk_bdev_desc *desc;
    5101             :         bdev_nvme_set_multipath_policy_cb cb_fn;
    5102             :         void *cb_arg;
    5103             : };
    5104             : 
    5105             : static void
    5106           3 : bdev_nvme_set_multipath_policy_done(struct spdk_io_channel_iter *i, int status)
    5107             : {
    5108           3 :         struct bdev_nvme_set_multipath_policy_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    5109             : 
    5110           3 :         assert(ctx != NULL);
    5111           3 :         assert(ctx->desc != NULL);
    5112           3 :         assert(ctx->cb_fn != NULL);
    5113             : 
    5114           3 :         spdk_bdev_close(ctx->desc);
    5115             : 
    5116           3 :         ctx->cb_fn(ctx->cb_arg, status);
    5117             : 
    5118           3 :         free(ctx);
    5119           3 : }
    5120             : 
    5121             : static void
    5122           1 : _bdev_nvme_set_multipath_policy(struct spdk_io_channel_iter *i)
    5123             : {
    5124           1 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
    5125           1 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(_ch);
    5126           1 :         struct nvme_bdev *nbdev = spdk_io_channel_get_io_device(_ch);
    5127             : 
    5128           1 :         nbdev_ch->mp_policy = nbdev->mp_policy;
    5129           1 :         nbdev_ch->mp_selector = nbdev->mp_selector;
    5130           1 :         nbdev_ch->rr_min_io = nbdev->rr_min_io;
    5131           1 :         bdev_nvme_clear_current_io_path(nbdev_ch);
    5132             : 
    5133           1 :         spdk_for_each_channel_continue(i, 0);
    5134           1 : }
    5135             : 
    5136             : void
    5137           3 : bdev_nvme_set_multipath_policy(const char *name, enum bdev_nvme_multipath_policy policy,
    5138             :                                enum bdev_nvme_multipath_selector selector, uint32_t rr_min_io,
    5139             :                                bdev_nvme_set_multipath_policy_cb cb_fn, void *cb_arg)
    5140             : {
    5141             :         struct bdev_nvme_set_multipath_policy_ctx *ctx;
    5142             :         struct spdk_bdev *bdev;
    5143             :         struct nvme_bdev *nbdev;
    5144             :         int rc;
    5145             : 
    5146           3 :         assert(cb_fn != NULL);
    5147             : 
    5148           3 :         switch (policy) {
    5149           1 :         case BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE:
    5150           1 :                 break;
    5151           2 :         case BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE:
    5152             :                 switch (selector) {
    5153           1 :                 case BDEV_NVME_MP_SELECTOR_ROUND_ROBIN:
    5154           1 :                         if (rr_min_io == UINT32_MAX) {
    5155           0 :                                 rr_min_io = 1;
    5156           1 :                         } else if (rr_min_io == 0) {
    5157           0 :                                 rc = -EINVAL;
    5158           0 :                                 goto exit;
    5159             :                         }
    5160           1 :                         break;
    5161           1 :                 case BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH:
    5162           1 :                         break;
    5163           0 :                 default:
    5164           0 :                         rc = -EINVAL;
    5165           0 :                         goto exit;
    5166             :                 }
    5167           2 :                 break;
    5168           0 :         default:
    5169           0 :                 rc = -EINVAL;
    5170           0 :                 goto exit;
    5171             :         }
    5172             : 
    5173           3 :         ctx = calloc(1, sizeof(*ctx));
    5174           3 :         if (ctx == NULL) {
    5175           0 :                 SPDK_ERRLOG("Failed to alloc context.\n");
    5176           0 :                 rc = -ENOMEM;
    5177           0 :                 goto exit;
    5178             :         }
    5179             : 
    5180           3 :         ctx->cb_fn = cb_fn;
    5181           3 :         ctx->cb_arg = cb_arg;
    5182             : 
    5183           3 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &ctx->desc);
    5184           3 :         if (rc != 0) {
    5185           0 :                 SPDK_ERRLOG("Failed to open bdev %s.\n", name);
    5186           0 :                 rc = -ENODEV;
    5187           0 :                 goto err_open;
    5188             :         }
    5189             : 
    5190           3 :         bdev = spdk_bdev_desc_get_bdev(ctx->desc);
    5191           3 :         if (bdev->module != &nvme_if) {
    5192           0 :                 SPDK_ERRLOG("bdev %s is not registered in this module.\n", name);
    5193           0 :                 rc = -ENODEV;
    5194           0 :                 goto err_module;
    5195             :         }
    5196           3 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    5197             : 
    5198           3 :         pthread_mutex_lock(&nbdev->mutex);
    5199           3 :         nbdev->mp_policy = policy;
    5200           3 :         nbdev->mp_selector = selector;
    5201           3 :         nbdev->rr_min_io = rr_min_io;
    5202           3 :         pthread_mutex_unlock(&nbdev->mutex);
    5203             : 
    5204           3 :         spdk_for_each_channel(nbdev,
    5205             :                               _bdev_nvme_set_multipath_policy,
    5206             :                               ctx,
    5207             :                               bdev_nvme_set_multipath_policy_done);
    5208           3 :         return;
    5209             : 
    5210           0 : err_module:
    5211           0 :         spdk_bdev_close(ctx->desc);
    5212           0 : err_open:
    5213           0 :         free(ctx);
    5214           0 : exit:
    5215           0 :         cb_fn(cb_arg, rc);
    5216             : }
    5217             : 
    5218             : static void
    5219           3 : aer_cb(void *arg, const struct spdk_nvme_cpl *cpl)
    5220             : {
    5221           3 :         struct nvme_ctrlr *nvme_ctrlr           = arg;
    5222             :         union spdk_nvme_async_event_completion  event;
    5223             : 
    5224           3 :         if (spdk_nvme_cpl_is_error(cpl)) {
    5225           0 :                 SPDK_WARNLOG("AER request execute failed\n");
    5226           0 :                 return;
    5227             :         }
    5228             : 
    5229           3 :         event.raw = cpl->cdw0;
    5230           3 :         if ((event.bits.async_event_type == SPDK_NVME_ASYNC_EVENT_TYPE_NOTICE) &&
    5231           3 :             (event.bits.async_event_info == SPDK_NVME_ASYNC_EVENT_NS_ATTR_CHANGED)) {
    5232           2 :                 nvme_ctrlr_populate_namespaces(nvme_ctrlr, NULL);
    5233           1 :         } else if ((event.bits.async_event_type == SPDK_NVME_ASYNC_EVENT_TYPE_NOTICE) &&
    5234           1 :                    (event.bits.async_event_info == SPDK_NVME_ASYNC_EVENT_ANA_CHANGE)) {
    5235           1 :                 nvme_ctrlr_read_ana_log_page(nvme_ctrlr);
    5236             :         }
    5237             : }
    5238             : 
    5239             : static void
    5240          51 : free_nvme_async_probe_ctx(struct nvme_async_probe_ctx *ctx)
    5241             : {
    5242          51 :         spdk_keyring_put_key(ctx->drv_opts.tls_psk);
    5243          51 :         spdk_keyring_put_key(ctx->drv_opts.dhchap_key);
    5244          51 :         spdk_keyring_put_key(ctx->drv_opts.dhchap_ctrlr_key);
    5245          51 :         free(ctx);
    5246          51 : }
    5247             : 
    5248             : static void
    5249          51 : populate_namespaces_cb(struct nvme_async_probe_ctx *ctx, int rc)
    5250             : {
    5251          51 :         if (ctx->cb_fn) {
    5252          51 :                 ctx->cb_fn(ctx->cb_ctx, ctx->reported_bdevs, rc);
    5253             :         }
    5254             : 
    5255          51 :         ctx->namespaces_populated = true;
    5256          51 :         if (ctx->probe_done) {
    5257             :                 /* The probe was already completed, so we need to free the context
    5258             :                  * here.  This can happen for cases like OCSSD, where we need to
    5259             :                  * send additional commands to the SSD after attach.
    5260             :                  */
    5261          31 :                 free_nvme_async_probe_ctx(ctx);
    5262             :         }
    5263          51 : }
    5264             : 
    5265             : static void
    5266          59 : nvme_ctrlr_create_done(struct nvme_ctrlr *nvme_ctrlr,
    5267             :                        struct nvme_async_probe_ctx *ctx)
    5268             : {
    5269          59 :         spdk_io_device_register(nvme_ctrlr,
    5270             :                                 bdev_nvme_create_ctrlr_channel_cb,
    5271             :                                 bdev_nvme_destroy_ctrlr_channel_cb,
    5272             :                                 sizeof(struct nvme_ctrlr_channel),
    5273          59 :                                 nvme_ctrlr->nbdev_ctrlr->name);
    5274             : 
    5275          59 :         nvme_ctrlr_populate_namespaces(nvme_ctrlr, ctx);
    5276          59 : }
    5277             : 
    5278             : static void
    5279          30 : nvme_ctrlr_init_ana_log_page_done(void *_ctx, const struct spdk_nvme_cpl *cpl)
    5280             : {
    5281          30 :         struct nvme_ctrlr *nvme_ctrlr = _ctx;
    5282          30 :         struct nvme_async_probe_ctx *ctx = nvme_ctrlr->probe_ctx;
    5283             : 
    5284          30 :         nvme_ctrlr->probe_ctx = NULL;
    5285             : 
    5286          30 :         if (spdk_nvme_cpl_is_error(cpl)) {
    5287           0 :                 nvme_ctrlr_delete(nvme_ctrlr);
    5288             : 
    5289           0 :                 if (ctx != NULL) {
    5290           0 :                         ctx->reported_bdevs = 0;
    5291           0 :                         populate_namespaces_cb(ctx, -1);
    5292             :                 }
    5293           0 :                 return;
    5294             :         }
    5295             : 
    5296          30 :         nvme_ctrlr_create_done(nvme_ctrlr, ctx);
    5297             : }
    5298             : 
    5299             : static int
    5300          30 : nvme_ctrlr_init_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
    5301             :                              struct nvme_async_probe_ctx *ctx)
    5302             : {
    5303          30 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5304             :         const struct spdk_nvme_ctrlr_data *cdata;
    5305             :         uint32_t ana_log_page_size;
    5306             : 
    5307          30 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5308             : 
    5309             :         /* Set buffer size enough to include maximum number of allowed namespaces. */
    5310          30 :         ana_log_page_size = sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
    5311          30 :                             sizeof(struct spdk_nvme_ana_group_descriptor) + cdata->mnan *
    5312             :                             sizeof(uint32_t);
    5313             : 
    5314          30 :         nvme_ctrlr->ana_log_page = spdk_zmalloc(ana_log_page_size, 64, NULL,
    5315             :                                                 SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
    5316          30 :         if (nvme_ctrlr->ana_log_page == NULL) {
    5317           0 :                 SPDK_ERRLOG("could not allocate ANA log page buffer\n");
    5318           0 :                 return -ENXIO;
    5319             :         }
    5320             : 
    5321             :         /* Each descriptor in a ANA log page is not ensured to be 8-bytes aligned.
    5322             :          * Hence copy each descriptor to a temporary area when parsing it.
    5323             :          *
    5324             :          * Allocate a buffer whose size is as large as ANA log page buffer because
    5325             :          * we do not know the size of a descriptor until actually reading it.
    5326             :          */
    5327          30 :         nvme_ctrlr->copied_ana_desc = calloc(1, ana_log_page_size);
    5328          30 :         if (nvme_ctrlr->copied_ana_desc == NULL) {
    5329           0 :                 SPDK_ERRLOG("could not allocate a buffer to parse ANA descriptor\n");
    5330           0 :                 return -ENOMEM;
    5331             :         }
    5332             : 
    5333          30 :         nvme_ctrlr->max_ana_log_page_size = ana_log_page_size;
    5334             : 
    5335          30 :         nvme_ctrlr->probe_ctx = ctx;
    5336             : 
    5337             :         /* Then, set the read size only to include the current active namespaces. */
    5338          30 :         ana_log_page_size = nvme_ctrlr_get_ana_log_page_size(nvme_ctrlr);
    5339             : 
    5340          30 :         if (ana_log_page_size > nvme_ctrlr->max_ana_log_page_size) {
    5341           0 :                 SPDK_ERRLOG("ANA log page size %" PRIu32 " is larger than allowed %" PRIu32 "\n",
    5342             :                             ana_log_page_size, nvme_ctrlr->max_ana_log_page_size);
    5343           0 :                 return -EINVAL;
    5344             :         }
    5345             : 
    5346          30 :         return spdk_nvme_ctrlr_cmd_get_log_page(ctrlr,
    5347             :                                                 SPDK_NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS,
    5348             :                                                 SPDK_NVME_GLOBAL_NS_TAG,
    5349          30 :                                                 nvme_ctrlr->ana_log_page,
    5350             :                                                 ana_log_page_size, 0,
    5351             :                                                 nvme_ctrlr_init_ana_log_page_done,
    5352             :                                                 nvme_ctrlr);
    5353             : }
    5354             : 
    5355             : /* hostnqn and subnqn were already verified before attaching a controller.
    5356             :  * Hence check only the multipath capability and cntlid here.
    5357             :  */
    5358             : static bool
    5359          16 : bdev_nvme_check_multipath(struct nvme_bdev_ctrlr *nbdev_ctrlr, struct spdk_nvme_ctrlr *ctrlr)
    5360             : {
    5361             :         struct nvme_ctrlr *tmp;
    5362             :         const struct spdk_nvme_ctrlr_data *cdata, *tmp_cdata;
    5363             : 
    5364          16 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5365             : 
    5366          16 :         if (!cdata->cmic.multi_ctrlr) {
    5367           0 :                 SPDK_ERRLOG("Ctrlr%u does not support multipath.\n", cdata->cntlid);
    5368           0 :                 return false;
    5369             :         }
    5370             : 
    5371          33 :         TAILQ_FOREACH(tmp, &nbdev_ctrlr->ctrlrs, tailq) {
    5372          18 :                 tmp_cdata = spdk_nvme_ctrlr_get_data(tmp->ctrlr);
    5373             : 
    5374          18 :                 if (!tmp_cdata->cmic.multi_ctrlr) {
    5375           0 :                         SPDK_ERRLOG("Ctrlr%u does not support multipath.\n", cdata->cntlid);
    5376           0 :                         return false;
    5377             :                 }
    5378          18 :                 if (cdata->cntlid == tmp_cdata->cntlid) {
    5379           1 :                         SPDK_ERRLOG("cntlid %u are duplicated.\n", tmp_cdata->cntlid);
    5380           1 :                         return false;
    5381             :                 }
    5382             :         }
    5383             : 
    5384          15 :         return true;
    5385             : }
    5386             : 
    5387             : static int
    5388          60 : nvme_bdev_ctrlr_create(const char *name, struct nvme_ctrlr *nvme_ctrlr)
    5389             : {
    5390             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    5391          60 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5392          60 :         int rc = 0;
    5393             : 
    5394          60 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    5395             : 
    5396          60 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    5397          60 :         if (nbdev_ctrlr != NULL) {
    5398          16 :                 if (!bdev_nvme_check_multipath(nbdev_ctrlr, ctrlr)) {
    5399           1 :                         rc = -EINVAL;
    5400           1 :                         goto exit;
    5401             :                 }
    5402             :         } else {
    5403          44 :                 nbdev_ctrlr = calloc(1, sizeof(*nbdev_ctrlr));
    5404          44 :                 if (nbdev_ctrlr == NULL) {
    5405           0 :                         SPDK_ERRLOG("Failed to allocate nvme_bdev_ctrlr.\n");
    5406           0 :                         rc = -ENOMEM;
    5407           0 :                         goto exit;
    5408             :                 }
    5409          44 :                 nbdev_ctrlr->name = strdup(name);
    5410          44 :                 if (nbdev_ctrlr->name == NULL) {
    5411           0 :                         SPDK_ERRLOG("Failed to allocate name of nvme_bdev_ctrlr.\n");
    5412           0 :                         free(nbdev_ctrlr);
    5413           0 :                         goto exit;
    5414             :                 }
    5415          44 :                 TAILQ_INIT(&nbdev_ctrlr->ctrlrs);
    5416          44 :                 TAILQ_INIT(&nbdev_ctrlr->bdevs);
    5417          44 :                 TAILQ_INSERT_TAIL(&g_nvme_bdev_ctrlrs, nbdev_ctrlr, tailq);
    5418             :         }
    5419          59 :         nvme_ctrlr->nbdev_ctrlr = nbdev_ctrlr;
    5420          59 :         TAILQ_INSERT_TAIL(&nbdev_ctrlr->ctrlrs, nvme_ctrlr, tailq);
    5421          60 : exit:
    5422          60 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    5423          60 :         return rc;
    5424             : }
    5425             : 
    5426             : static int
    5427          60 : nvme_ctrlr_create(struct spdk_nvme_ctrlr *ctrlr,
    5428             :                   const char *name,
    5429             :                   const struct spdk_nvme_transport_id *trid,
    5430             :                   struct nvme_async_probe_ctx *ctx)
    5431             : {
    5432             :         struct nvme_ctrlr *nvme_ctrlr;
    5433             :         struct nvme_path_id *path_id;
    5434             :         const struct spdk_nvme_ctrlr_data *cdata;
    5435             :         int rc;
    5436             : 
    5437          60 :         nvme_ctrlr = calloc(1, sizeof(*nvme_ctrlr));
    5438          60 :         if (nvme_ctrlr == NULL) {
    5439           0 :                 SPDK_ERRLOG("Failed to allocate device struct\n");
    5440           0 :                 return -ENOMEM;
    5441             :         }
    5442             : 
    5443          60 :         rc = pthread_mutex_init(&nvme_ctrlr->mutex, NULL);
    5444          60 :         if (rc != 0) {
    5445           0 :                 free(nvme_ctrlr);
    5446           0 :                 return rc;
    5447             :         }
    5448             : 
    5449          60 :         TAILQ_INIT(&nvme_ctrlr->trids);
    5450          60 :         RB_INIT(&nvme_ctrlr->namespaces);
    5451             : 
    5452             :         /* Get another reference to the key, so the first one can be released from probe_ctx */
    5453          60 :         if (ctx != NULL) {
    5454          46 :                 if (ctx->drv_opts.tls_psk != NULL) {
    5455           0 :                         nvme_ctrlr->psk = spdk_keyring_get_key(
    5456             :                                                   spdk_key_get_name(ctx->drv_opts.tls_psk));
    5457           0 :                         if (nvme_ctrlr->psk == NULL) {
    5458             :                                 /* Could only happen if the key was removed in the meantime */
    5459           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5460             :                                             spdk_key_get_name(ctx->drv_opts.tls_psk));
    5461           0 :                                 rc = -ENOKEY;
    5462           0 :                                 goto err;
    5463             :                         }
    5464             :                 }
    5465             : 
    5466          46 :                 if (ctx->drv_opts.dhchap_key != NULL) {
    5467           0 :                         nvme_ctrlr->dhchap_key = spdk_keyring_get_key(
    5468             :                                                          spdk_key_get_name(ctx->drv_opts.dhchap_key));
    5469           0 :                         if (nvme_ctrlr->dhchap_key == NULL) {
    5470           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5471             :                                             spdk_key_get_name(ctx->drv_opts.dhchap_key));
    5472           0 :                                 rc = -ENOKEY;
    5473           0 :                                 goto err;
    5474             :                         }
    5475             :                 }
    5476             : 
    5477          46 :                 if (ctx->drv_opts.dhchap_ctrlr_key != NULL) {
    5478           0 :                         nvme_ctrlr->dhchap_ctrlr_key =
    5479           0 :                                 spdk_keyring_get_key(
    5480             :                                         spdk_key_get_name(ctx->drv_opts.dhchap_ctrlr_key));
    5481           0 :                         if (nvme_ctrlr->dhchap_ctrlr_key == NULL) {
    5482           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5483             :                                             spdk_key_get_name(ctx->drv_opts.dhchap_ctrlr_key));
    5484           0 :                                 rc = -ENOKEY;
    5485           0 :                                 goto err;
    5486             :                         }
    5487             :                 }
    5488             :         }
    5489             : 
    5490          60 :         path_id = calloc(1, sizeof(*path_id));
    5491          60 :         if (path_id == NULL) {
    5492           0 :                 SPDK_ERRLOG("Failed to allocate trid entry pointer\n");
    5493           0 :                 rc = -ENOMEM;
    5494           0 :                 goto err;
    5495             :         }
    5496             : 
    5497          60 :         path_id->trid = *trid;
    5498          60 :         if (ctx != NULL) {
    5499          46 :                 memcpy(path_id->hostid.hostaddr, ctx->drv_opts.src_addr, sizeof(path_id->hostid.hostaddr));
    5500          46 :                 memcpy(path_id->hostid.hostsvcid, ctx->drv_opts.src_svcid, sizeof(path_id->hostid.hostsvcid));
    5501             :         }
    5502          60 :         nvme_ctrlr->active_path_id = path_id;
    5503          60 :         TAILQ_INSERT_HEAD(&nvme_ctrlr->trids, path_id, link);
    5504             : 
    5505          60 :         nvme_ctrlr->thread = spdk_get_thread();
    5506          60 :         nvme_ctrlr->ctrlr = ctrlr;
    5507          60 :         nvme_ctrlr->ref = 1;
    5508             : 
    5509          60 :         if (spdk_nvme_ctrlr_is_ocssd_supported(ctrlr)) {
    5510           0 :                 SPDK_ERRLOG("OCSSDs are not supported");
    5511           0 :                 rc = -ENOTSUP;
    5512           0 :                 goto err;
    5513             :         }
    5514             : 
    5515          60 :         if (ctx != NULL) {
    5516          46 :                 memcpy(&nvme_ctrlr->opts, &ctx->bdev_opts, sizeof(ctx->bdev_opts));
    5517             :         } else {
    5518          14 :                 bdev_nvme_get_default_ctrlr_opts(&nvme_ctrlr->opts);
    5519             :         }
    5520             : 
    5521          60 :         nvme_ctrlr->adminq_timer_poller = SPDK_POLLER_REGISTER(bdev_nvme_poll_adminq, nvme_ctrlr,
    5522             :                                           g_opts.nvme_adminq_poll_period_us);
    5523             : 
    5524          60 :         if (g_opts.timeout_us > 0) {
    5525             :                 /* Register timeout callback. Timeout values for IO vs. admin reqs can be different. */
    5526             :                 /* If timeout_admin_us is 0 (not specified), admin uses same timeout as IO. */
    5527           0 :                 uint64_t adm_timeout_us = (g_opts.timeout_admin_us == 0) ?
    5528           0 :                                           g_opts.timeout_us : g_opts.timeout_admin_us;
    5529           0 :                 spdk_nvme_ctrlr_register_timeout_callback(ctrlr, g_opts.timeout_us,
    5530             :                                 adm_timeout_us, timeout_cb, nvme_ctrlr);
    5531             :         }
    5532             : 
    5533          60 :         spdk_nvme_ctrlr_register_aer_callback(ctrlr, aer_cb, nvme_ctrlr);
    5534          60 :         spdk_nvme_ctrlr_set_remove_cb(ctrlr, remove_cb, nvme_ctrlr);
    5535             : 
    5536          60 :         if (spdk_nvme_ctrlr_get_flags(ctrlr) &
    5537             :             SPDK_NVME_CTRLR_SECURITY_SEND_RECV_SUPPORTED) {
    5538           0 :                 nvme_ctrlr->opal_dev = spdk_opal_dev_construct(ctrlr);
    5539             :         }
    5540             : 
    5541          60 :         rc = nvme_bdev_ctrlr_create(name, nvme_ctrlr);
    5542          60 :         if (rc != 0) {
    5543           1 :                 goto err;
    5544             :         }
    5545             : 
    5546          59 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5547             : 
    5548          59 :         if (cdata->cmic.ana_reporting) {
    5549          30 :                 rc = nvme_ctrlr_init_ana_log_page(nvme_ctrlr, ctx);
    5550          30 :                 if (rc == 0) {
    5551          30 :                         return 0;
    5552             :                 }
    5553             :         } else {
    5554          29 :                 nvme_ctrlr_create_done(nvme_ctrlr, ctx);
    5555          29 :                 return 0;
    5556             :         }
    5557             : 
    5558           1 : err:
    5559           1 :         nvme_ctrlr_delete(nvme_ctrlr);
    5560           1 :         return rc;
    5561             : }
    5562             : 
    5563             : void
    5564          56 : bdev_nvme_get_default_ctrlr_opts(struct nvme_ctrlr_opts *opts)
    5565             : {
    5566          56 :         opts->prchk_flags = 0;
    5567          56 :         opts->ctrlr_loss_timeout_sec = g_opts.ctrlr_loss_timeout_sec;
    5568          56 :         opts->reconnect_delay_sec = g_opts.reconnect_delay_sec;
    5569          56 :         opts->fast_io_fail_timeout_sec = g_opts.fast_io_fail_timeout_sec;
    5570          56 : }
    5571             : 
    5572             : static void
    5573           0 : attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    5574             :           struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *drv_opts)
    5575             : {
    5576             :         char *name;
    5577             : 
    5578           0 :         name = spdk_sprintf_alloc("HotInNvme%d", g_hot_insert_nvme_controller_index++);
    5579           0 :         if (!name) {
    5580           0 :                 SPDK_ERRLOG("Failed to assign name to NVMe device\n");
    5581           0 :                 return;
    5582             :         }
    5583             : 
    5584           0 :         if (nvme_ctrlr_create(ctrlr, name, trid, NULL) == 0) {
    5585           0 :                 SPDK_DEBUGLOG(bdev_nvme, "Attached to %s (%s)\n", trid->traddr, name);
    5586             :         } else {
    5587           0 :                 SPDK_ERRLOG("Failed to attach to %s (%s)\n", trid->traddr, name);
    5588             :         }
    5589             : 
    5590           0 :         free(name);
    5591             : }
    5592             : 
    5593             : static void
    5594          59 : _nvme_ctrlr_destruct(void *ctx)
    5595             : {
    5596          59 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    5597             : 
    5598          59 :         nvme_ctrlr_depopulate_namespaces(nvme_ctrlr);
    5599          59 :         nvme_ctrlr_release(nvme_ctrlr);
    5600          59 : }
    5601             : 
    5602             : static int
    5603          56 : bdev_nvme_delete_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
    5604             : {
    5605             :         struct nvme_probe_skip_entry *entry;
    5606             : 
    5607             :         /* The controller's destruction was already started */
    5608          56 :         if (nvme_ctrlr->destruct) {
    5609           0 :                 return -EALREADY;
    5610             :         }
    5611             : 
    5612          56 :         if (!hotplug &&
    5613          56 :             nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE) {
    5614           0 :                 entry = calloc(1, sizeof(*entry));
    5615           0 :                 if (!entry) {
    5616           0 :                         return -ENOMEM;
    5617             :                 }
    5618           0 :                 entry->trid = nvme_ctrlr->active_path_id->trid;
    5619           0 :                 TAILQ_INSERT_TAIL(&g_skipped_nvme_ctrlrs, entry, tailq);
    5620             :         }
    5621             : 
    5622          56 :         nvme_ctrlr->destruct = true;
    5623          56 :         return 0;
    5624             : }
    5625             : 
    5626             : static int
    5627           2 : bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
    5628             : {
    5629             :         int rc;
    5630             : 
    5631           2 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    5632           2 :         rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, hotplug);
    5633           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5634             : 
    5635           2 :         if (rc == 0) {
    5636           2 :                 _nvme_ctrlr_destruct(nvme_ctrlr);
    5637           0 :         } else if (rc == -EALREADY) {
    5638           0 :                 rc = 0;
    5639             :         }
    5640             : 
    5641           2 :         return rc;
    5642             : }
    5643             : 
    5644             : static void
    5645           0 : remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr)
    5646             : {
    5647           0 :         struct nvme_ctrlr *nvme_ctrlr = cb_ctx;
    5648             : 
    5649           0 :         bdev_nvme_delete_ctrlr(nvme_ctrlr, true);
    5650           0 : }
    5651             : 
    5652             : static int
    5653           0 : bdev_nvme_hotplug_probe(void *arg)
    5654             : {
    5655           0 :         if (g_hotplug_probe_ctx == NULL) {
    5656           0 :                 spdk_poller_unregister(&g_hotplug_probe_poller);
    5657           0 :                 return SPDK_POLLER_IDLE;
    5658             :         }
    5659             : 
    5660           0 :         if (spdk_nvme_probe_poll_async(g_hotplug_probe_ctx) != -EAGAIN) {
    5661           0 :                 g_hotplug_probe_ctx = NULL;
    5662           0 :                 spdk_poller_unregister(&g_hotplug_probe_poller);
    5663             :         }
    5664             : 
    5665           0 :         return SPDK_POLLER_BUSY;
    5666             : }
    5667             : 
    5668             : static int
    5669           0 : bdev_nvme_hotplug(void *arg)
    5670             : {
    5671           0 :         struct spdk_nvme_transport_id trid_pcie;
    5672             : 
    5673           0 :         if (g_hotplug_probe_ctx) {
    5674           0 :                 return SPDK_POLLER_BUSY;
    5675             :         }
    5676             : 
    5677           0 :         memset(&trid_pcie, 0, sizeof(trid_pcie));
    5678           0 :         spdk_nvme_trid_populate_transport(&trid_pcie, SPDK_NVME_TRANSPORT_PCIE);
    5679             : 
    5680           0 :         g_hotplug_probe_ctx = spdk_nvme_probe_async(&trid_pcie, NULL,
    5681             :                               hotplug_probe_cb, attach_cb, NULL);
    5682             : 
    5683           0 :         if (g_hotplug_probe_ctx) {
    5684           0 :                 assert(g_hotplug_probe_poller == NULL);
    5685           0 :                 g_hotplug_probe_poller = SPDK_POLLER_REGISTER(bdev_nvme_hotplug_probe, NULL, 1000);
    5686             :         }
    5687             : 
    5688           0 :         return SPDK_POLLER_BUSY;
    5689             : }
    5690             : 
    5691             : void
    5692           0 : bdev_nvme_get_opts(struct spdk_bdev_nvme_opts *opts)
    5693             : {
    5694           0 :         *opts = g_opts;
    5695           0 : }
    5696             : 
    5697             : static bool bdev_nvme_check_io_error_resiliency_params(int32_t ctrlr_loss_timeout_sec,
    5698             :                 uint32_t reconnect_delay_sec,
    5699             :                 uint32_t fast_io_fail_timeout_sec);
    5700             : 
    5701             : static int
    5702           0 : bdev_nvme_validate_opts(const struct spdk_bdev_nvme_opts *opts)
    5703             : {
    5704           0 :         if ((opts->timeout_us == 0) && (opts->timeout_admin_us != 0)) {
    5705             :                 /* Can't set timeout_admin_us without also setting timeout_us */
    5706           0 :                 SPDK_WARNLOG("Invalid options: Can't have (timeout_us == 0) with (timeout_admin_us > 0)\n");
    5707           0 :                 return -EINVAL;
    5708             :         }
    5709             : 
    5710           0 :         if (opts->bdev_retry_count < -1) {
    5711           0 :                 SPDK_WARNLOG("Invalid option: bdev_retry_count can't be less than -1.\n");
    5712           0 :                 return -EINVAL;
    5713             :         }
    5714             : 
    5715           0 :         if (!bdev_nvme_check_io_error_resiliency_params(opts->ctrlr_loss_timeout_sec,
    5716             :                         opts->reconnect_delay_sec,
    5717             :                         opts->fast_io_fail_timeout_sec)) {
    5718           0 :                 return -EINVAL;
    5719             :         }
    5720             : 
    5721           0 :         return 0;
    5722             : }
    5723             : 
    5724             : int
    5725           0 : bdev_nvme_set_opts(const struct spdk_bdev_nvme_opts *opts)
    5726             : {
    5727             :         int ret;
    5728             : 
    5729           0 :         ret = bdev_nvme_validate_opts(opts);
    5730           0 :         if (ret) {
    5731           0 :                 SPDK_WARNLOG("Failed to set nvme opts.\n");
    5732           0 :                 return ret;
    5733             :         }
    5734             : 
    5735           0 :         if (g_bdev_nvme_init_thread != NULL) {
    5736           0 :                 if (!TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    5737           0 :                         return -EPERM;
    5738             :                 }
    5739             :         }
    5740             : 
    5741           0 :         if (opts->rdma_srq_size != 0 ||
    5742           0 :             opts->rdma_max_cq_size != 0 ||
    5743           0 :             opts->rdma_cm_event_timeout_ms != 0) {
    5744           0 :                 struct spdk_nvme_transport_opts drv_opts;
    5745             : 
    5746           0 :                 spdk_nvme_transport_get_opts(&drv_opts, sizeof(drv_opts));
    5747           0 :                 if (opts->rdma_srq_size != 0) {
    5748           0 :                         drv_opts.rdma_srq_size = opts->rdma_srq_size;
    5749             :                 }
    5750           0 :                 if (opts->rdma_max_cq_size != 0) {
    5751           0 :                         drv_opts.rdma_max_cq_size = opts->rdma_max_cq_size;
    5752             :                 }
    5753           0 :                 if (opts->rdma_cm_event_timeout_ms != 0) {
    5754           0 :                         drv_opts.rdma_cm_event_timeout_ms = opts->rdma_cm_event_timeout_ms;
    5755             :                 }
    5756             : 
    5757           0 :                 ret = spdk_nvme_transport_set_opts(&drv_opts, sizeof(drv_opts));
    5758           0 :                 if (ret) {
    5759           0 :                         SPDK_ERRLOG("Failed to set NVMe transport opts.\n");
    5760           0 :                         return ret;
    5761             :                 }
    5762             :         }
    5763             : 
    5764           0 :         g_opts = *opts;
    5765             : 
    5766           0 :         return 0;
    5767             : }
    5768             : 
    5769             : struct set_nvme_hotplug_ctx {
    5770             :         uint64_t period_us;
    5771             :         bool enabled;
    5772             :         spdk_msg_fn fn;
    5773             :         void *fn_ctx;
    5774             : };
    5775             : 
    5776             : static void
    5777           0 : set_nvme_hotplug_period_cb(void *_ctx)
    5778             : {
    5779           0 :         struct set_nvme_hotplug_ctx *ctx = _ctx;
    5780             : 
    5781           0 :         spdk_poller_unregister(&g_hotplug_poller);
    5782           0 :         if (ctx->enabled) {
    5783           0 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_hotplug, NULL, ctx->period_us);
    5784             :         }
    5785             : 
    5786           0 :         g_nvme_hotplug_poll_period_us = ctx->period_us;
    5787           0 :         g_nvme_hotplug_enabled = ctx->enabled;
    5788           0 :         if (ctx->fn) {
    5789           0 :                 ctx->fn(ctx->fn_ctx);
    5790             :         }
    5791             : 
    5792           0 :         free(ctx);
    5793           0 : }
    5794             : 
    5795             : int
    5796           0 : bdev_nvme_set_hotplug(bool enabled, uint64_t period_us, spdk_msg_fn cb, void *cb_ctx)
    5797             : {
    5798             :         struct set_nvme_hotplug_ctx *ctx;
    5799             : 
    5800           0 :         if (enabled == true && !spdk_process_is_primary()) {
    5801           0 :                 return -EPERM;
    5802             :         }
    5803             : 
    5804           0 :         ctx = calloc(1, sizeof(*ctx));
    5805           0 :         if (ctx == NULL) {
    5806           0 :                 return -ENOMEM;
    5807             :         }
    5808             : 
    5809           0 :         period_us = period_us == 0 ? NVME_HOTPLUG_POLL_PERIOD_DEFAULT : period_us;
    5810           0 :         ctx->period_us = spdk_min(period_us, NVME_HOTPLUG_POLL_PERIOD_MAX);
    5811           0 :         ctx->enabled = enabled;
    5812           0 :         ctx->fn = cb;
    5813           0 :         ctx->fn_ctx = cb_ctx;
    5814             : 
    5815           0 :         spdk_thread_send_msg(g_bdev_nvme_init_thread, set_nvme_hotplug_period_cb, ctx);
    5816           0 :         return 0;
    5817             : }
    5818             : 
    5819             : static void
    5820          45 : nvme_ctrlr_populate_namespaces_done(struct nvme_ctrlr *nvme_ctrlr,
    5821             :                                     struct nvme_async_probe_ctx *ctx)
    5822             : {
    5823             :         struct nvme_ns  *nvme_ns;
    5824             :         struct nvme_bdev        *nvme_bdev;
    5825             :         size_t                  j;
    5826             : 
    5827          45 :         assert(nvme_ctrlr != NULL);
    5828             : 
    5829          45 :         if (ctx->names == NULL) {
    5830           0 :                 ctx->reported_bdevs = 0;
    5831           0 :                 populate_namespaces_cb(ctx, 0);
    5832           0 :                 return;
    5833             :         }
    5834             : 
    5835             :         /*
    5836             :          * Report the new bdevs that were created in this call.
    5837             :          * There can be more than one bdev per NVMe controller.
    5838             :          */
    5839          45 :         j = 0;
    5840          45 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    5841          92 :         while (nvme_ns != NULL) {
    5842          47 :                 nvme_bdev = nvme_ns->bdev;
    5843          47 :                 if (j < ctx->max_bdevs) {
    5844          47 :                         ctx->names[j] = nvme_bdev->disk.name;
    5845          47 :                         j++;
    5846             :                 } else {
    5847           0 :                         SPDK_ERRLOG("Maximum number of namespaces supported per NVMe controller is %du. Unable to return all names of created bdevs\n",
    5848             :                                     ctx->max_bdevs);
    5849           0 :                         ctx->reported_bdevs = 0;
    5850           0 :                         populate_namespaces_cb(ctx, -ERANGE);
    5851           0 :                         return;
    5852             :                 }
    5853             : 
    5854          47 :                 nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    5855             :         }
    5856             : 
    5857          45 :         ctx->reported_bdevs = j;
    5858          45 :         populate_namespaces_cb(ctx, 0);
    5859             : }
    5860             : 
    5861             : static int
    5862           9 : bdev_nvme_check_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    5863             :                                struct spdk_nvme_ctrlr *new_ctrlr,
    5864             :                                struct spdk_nvme_transport_id *trid)
    5865             : {
    5866             :         struct nvme_path_id *tmp_trid;
    5867             : 
    5868           9 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    5869           0 :                 SPDK_ERRLOG("PCIe failover is not supported.\n");
    5870           0 :                 return -ENOTSUP;
    5871             :         }
    5872             : 
    5873             :         /* Currently we only support failover to the same transport type. */
    5874           9 :         if (nvme_ctrlr->active_path_id->trid.trtype != trid->trtype) {
    5875           0 :                 SPDK_WARNLOG("Failover from trtype: %s to a different trtype: %s is not supported currently\n",
    5876             :                              spdk_nvme_transport_id_trtype_str(nvme_ctrlr->active_path_id->trid.trtype),
    5877             :                              spdk_nvme_transport_id_trtype_str(trid->trtype));
    5878           0 :                 return -EINVAL;
    5879             :         }
    5880             : 
    5881             : 
    5882             :         /* Currently we only support failover to the same NQN. */
    5883           9 :         if (strncmp(trid->subnqn, nvme_ctrlr->active_path_id->trid.subnqn, SPDK_NVMF_NQN_MAX_LEN)) {
    5884           0 :                 SPDK_WARNLOG("Failover from subnqn: %s to a different subnqn: %s is not supported currently\n",
    5885             :                              nvme_ctrlr->active_path_id->trid.subnqn, trid->subnqn);
    5886           0 :                 return -EINVAL;
    5887             :         }
    5888             : 
    5889             :         /* Skip all the other checks if we've already registered this path. */
    5890          21 :         TAILQ_FOREACH(tmp_trid, &nvme_ctrlr->trids, link) {
    5891          12 :                 if (!spdk_nvme_transport_id_compare(&tmp_trid->trid, trid)) {
    5892           0 :                         SPDK_WARNLOG("This path (traddr: %s subnqn: %s) is already registered\n", trid->traddr,
    5893             :                                      trid->subnqn);
    5894           0 :                         return -EALREADY;
    5895             :                 }
    5896             :         }
    5897             : 
    5898           9 :         return 0;
    5899             : }
    5900             : 
    5901             : static int
    5902           9 : bdev_nvme_check_secondary_namespace(struct nvme_ctrlr *nvme_ctrlr,
    5903             :                                     struct spdk_nvme_ctrlr *new_ctrlr)
    5904             : {
    5905             :         struct nvme_ns *nvme_ns;
    5906             :         struct spdk_nvme_ns *new_ns;
    5907             : 
    5908           9 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    5909           9 :         while (nvme_ns != NULL) {
    5910           0 :                 new_ns = spdk_nvme_ctrlr_get_ns(new_ctrlr, nvme_ns->id);
    5911           0 :                 assert(new_ns != NULL);
    5912             : 
    5913           0 :                 if (!bdev_nvme_compare_ns(nvme_ns->ns, new_ns)) {
    5914           0 :                         return -EINVAL;
    5915             :                 }
    5916             : 
    5917           0 :                 nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    5918             :         }
    5919             : 
    5920           9 :         return 0;
    5921             : }
    5922             : 
    5923             : static int
    5924           9 : _bdev_nvme_add_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    5925             :                               struct spdk_nvme_transport_id *trid)
    5926             : {
    5927             :         struct nvme_path_id *active_id, *new_trid, *tmp_trid;
    5928             : 
    5929           9 :         new_trid = calloc(1, sizeof(*new_trid));
    5930           9 :         if (new_trid == NULL) {
    5931           0 :                 return -ENOMEM;
    5932             :         }
    5933           9 :         new_trid->trid = *trid;
    5934             : 
    5935           9 :         active_id = nvme_ctrlr->active_path_id;
    5936           9 :         assert(active_id != NULL);
    5937           9 :         assert(active_id == TAILQ_FIRST(&nvme_ctrlr->trids));
    5938             : 
    5939             :         /* Skip the active trid not to replace it until it is failed. */
    5940           9 :         tmp_trid = TAILQ_NEXT(active_id, link);
    5941           9 :         if (tmp_trid == NULL) {
    5942           6 :                 goto add_tail;
    5943             :         }
    5944             : 
    5945             :         /* It means the trid is faled if its last failed time is non-zero.
    5946             :          * Insert the new alternate trid before any failed trid.
    5947             :          */
    5948           5 :         TAILQ_FOREACH_FROM(tmp_trid, &nvme_ctrlr->trids, link) {
    5949           3 :                 if (tmp_trid->last_failed_tsc != 0) {
    5950           1 :                         TAILQ_INSERT_BEFORE(tmp_trid, new_trid, link);
    5951           1 :                         return 0;
    5952             :                 }
    5953             :         }
    5954             : 
    5955           2 : add_tail:
    5956           8 :         TAILQ_INSERT_TAIL(&nvme_ctrlr->trids, new_trid, link);
    5957           8 :         return 0;
    5958             : }
    5959             : 
    5960             : /* This is the case that a secondary path is added to an existing
    5961             :  * nvme_ctrlr for failover. After checking if it can access the same
    5962             :  * namespaces as the primary path, it is disconnected until failover occurs.
    5963             :  */
    5964             : static int
    5965           9 : bdev_nvme_add_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    5966             :                              struct spdk_nvme_ctrlr *new_ctrlr,
    5967             :                              struct spdk_nvme_transport_id *trid)
    5968             : {
    5969             :         int rc;
    5970             : 
    5971           9 :         assert(nvme_ctrlr != NULL);
    5972             : 
    5973           9 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    5974             : 
    5975           9 :         rc = bdev_nvme_check_secondary_trid(nvme_ctrlr, new_ctrlr, trid);
    5976           9 :         if (rc != 0) {
    5977           0 :                 goto exit;
    5978             :         }
    5979             : 
    5980           9 :         rc = bdev_nvme_check_secondary_namespace(nvme_ctrlr, new_ctrlr);
    5981           9 :         if (rc != 0) {
    5982           0 :                 goto exit;
    5983             :         }
    5984             : 
    5985           9 :         rc = _bdev_nvme_add_secondary_trid(nvme_ctrlr, trid);
    5986             : 
    5987           9 : exit:
    5988           9 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5989             : 
    5990           9 :         spdk_nvme_detach(new_ctrlr);
    5991             : 
    5992           9 :         return rc;
    5993             : }
    5994             : 
    5995             : static void
    5996          46 : connect_attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    5997             :                   struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
    5998             : {
    5999          46 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6000             :         struct nvme_async_probe_ctx *ctx;
    6001             :         int rc;
    6002             : 
    6003          46 :         ctx = SPDK_CONTAINEROF(user_opts, struct nvme_async_probe_ctx, drv_opts);
    6004          46 :         ctx->ctrlr_attached = true;
    6005             : 
    6006          46 :         rc = nvme_ctrlr_create(ctrlr, ctx->base_name, &ctx->trid, ctx);
    6007          46 :         if (rc != 0) {
    6008           1 :                 ctx->reported_bdevs = 0;
    6009           1 :                 populate_namespaces_cb(ctx, rc);
    6010             :         }
    6011          46 : }
    6012             : 
    6013             : static void
    6014           4 : connect_set_failover_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    6015             :                         struct spdk_nvme_ctrlr *ctrlr,
    6016             :                         const struct spdk_nvme_ctrlr_opts *opts)
    6017             : {
    6018           4 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6019             :         struct nvme_ctrlr *nvme_ctrlr;
    6020             :         struct nvme_async_probe_ctx *ctx;
    6021             :         int rc;
    6022             : 
    6023           4 :         ctx = SPDK_CONTAINEROF(user_opts, struct nvme_async_probe_ctx, drv_opts);
    6024           4 :         ctx->ctrlr_attached = true;
    6025             : 
    6026           4 :         nvme_ctrlr = nvme_ctrlr_get_by_name(ctx->base_name);
    6027           4 :         if (nvme_ctrlr) {
    6028           4 :                 rc = bdev_nvme_add_secondary_trid(nvme_ctrlr, ctrlr, &ctx->trid);
    6029             :         } else {
    6030           0 :                 rc = -ENODEV;
    6031             :         }
    6032             : 
    6033           4 :         ctx->reported_bdevs = 0;
    6034           4 :         populate_namespaces_cb(ctx, rc);
    6035           4 : }
    6036             : 
    6037             : static int
    6038          51 : bdev_nvme_async_poll(void *arg)
    6039             : {
    6040          51 :         struct nvme_async_probe_ctx     *ctx = arg;
    6041             :         int                             rc;
    6042             : 
    6043          51 :         rc = spdk_nvme_probe_poll_async(ctx->probe_ctx);
    6044          51 :         if (spdk_unlikely(rc != -EAGAIN)) {
    6045          51 :                 ctx->probe_done = true;
    6046          51 :                 spdk_poller_unregister(&ctx->poller);
    6047          51 :                 if (!ctx->ctrlr_attached) {
    6048             :                         /* The probe is done, but no controller was attached.
    6049             :                          * That means we had a failure, so report -EIO back to
    6050             :                          * the caller (usually the RPC). populate_namespaces_cb()
    6051             :                          * will take care of freeing the nvme_async_probe_ctx.
    6052             :                          */
    6053           1 :                         ctx->reported_bdevs = 0;
    6054           1 :                         populate_namespaces_cb(ctx, -EIO);
    6055          50 :                 } else if (ctx->namespaces_populated) {
    6056             :                         /* The namespaces for the attached controller were all
    6057             :                          * populated and the response was already sent to the
    6058             :                          * caller (usually the RPC).  So free the context here.
    6059             :                          */
    6060          20 :                         free_nvme_async_probe_ctx(ctx);
    6061             :                 }
    6062             :         }
    6063             : 
    6064          51 :         return SPDK_POLLER_BUSY;
    6065             : }
    6066             : 
    6067             : static bool
    6068          28 : bdev_nvme_check_io_error_resiliency_params(int32_t ctrlr_loss_timeout_sec,
    6069             :                 uint32_t reconnect_delay_sec,
    6070             :                 uint32_t fast_io_fail_timeout_sec)
    6071             : {
    6072          28 :         if (ctrlr_loss_timeout_sec < -1) {
    6073           1 :                 SPDK_ERRLOG("ctrlr_loss_timeout_sec can't be less than -1.\n");
    6074           1 :                 return false;
    6075          27 :         } else if (ctrlr_loss_timeout_sec == -1) {
    6076          13 :                 if (reconnect_delay_sec == 0) {
    6077           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be 0 if ctrlr_loss_timeout_sec is not 0.\n");
    6078           1 :                         return false;
    6079          12 :                 } else if (fast_io_fail_timeout_sec != 0 &&
    6080             :                            fast_io_fail_timeout_sec < reconnect_delay_sec) {
    6081           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be more than fast_io-fail_timeout_sec.\n");
    6082           1 :                         return false;
    6083             :                 }
    6084          14 :         } else if (ctrlr_loss_timeout_sec != 0) {
    6085          11 :                 if (reconnect_delay_sec == 0) {
    6086           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be 0 if ctrlr_loss_timeout_sec is not 0.\n");
    6087           1 :                         return false;
    6088          10 :                 } else if (reconnect_delay_sec > (uint32_t)ctrlr_loss_timeout_sec) {
    6089           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be more than ctrlr_loss_timeout_sec.\n");
    6090           1 :                         return false;
    6091           9 :                 } else if (fast_io_fail_timeout_sec != 0) {
    6092           6 :                         if (fast_io_fail_timeout_sec < reconnect_delay_sec) {
    6093           1 :                                 SPDK_ERRLOG("reconnect_delay_sec can't be more than fast_io_fail_timeout_sec.\n");
    6094           1 :                                 return false;
    6095           5 :                         } else if (fast_io_fail_timeout_sec > (uint32_t)ctrlr_loss_timeout_sec) {
    6096           1 :                                 SPDK_ERRLOG("fast_io_fail_timeout_sec can't be more than ctrlr_loss_timeout_sec.\n");
    6097           1 :                                 return false;
    6098             :                         }
    6099             :                 }
    6100           3 :         } else if (reconnect_delay_sec != 0 || fast_io_fail_timeout_sec != 0) {
    6101           2 :                 SPDK_ERRLOG("Both reconnect_delay_sec and fast_io_fail_timeout_sec must be 0 if ctrlr_loss_timeout_sec is 0.\n");
    6102           2 :                 return false;
    6103             :         }
    6104             : 
    6105          19 :         return true;
    6106             : }
    6107             : 
    6108             : static int
    6109           0 : bdev_nvme_load_psk(const char *fname, char *buf, size_t bufsz)
    6110             : {
    6111             :         FILE *psk_file;
    6112           0 :         struct stat statbuf;
    6113             :         int rc;
    6114             : #define TCP_PSK_INVALID_PERMISSIONS 0177
    6115             : 
    6116           0 :         if (stat(fname, &statbuf) != 0) {
    6117           0 :                 SPDK_ERRLOG("Could not read permissions for PSK file\n");
    6118           0 :                 return -EACCES;
    6119             :         }
    6120             : 
    6121           0 :         if ((statbuf.st_mode & TCP_PSK_INVALID_PERMISSIONS) != 0) {
    6122           0 :                 SPDK_ERRLOG("Incorrect permissions for PSK file\n");
    6123           0 :                 return -EPERM;
    6124             :         }
    6125           0 :         if ((size_t)statbuf.st_size >= bufsz) {
    6126           0 :                 SPDK_ERRLOG("Invalid PSK: too long\n");
    6127           0 :                 return -EINVAL;
    6128             :         }
    6129           0 :         psk_file = fopen(fname, "r");
    6130           0 :         if (psk_file == NULL) {
    6131           0 :                 SPDK_ERRLOG("Could not open PSK file\n");
    6132           0 :                 return -EINVAL;
    6133             :         }
    6134             : 
    6135           0 :         memset(buf, 0, bufsz);
    6136           0 :         rc = fread(buf, 1, statbuf.st_size, psk_file);
    6137           0 :         if (rc != statbuf.st_size) {
    6138           0 :                 SPDK_ERRLOG("Failed to read PSK\n");
    6139           0 :                 fclose(psk_file);
    6140           0 :                 return -EINVAL;
    6141             :         }
    6142             : 
    6143           0 :         fclose(psk_file);
    6144           0 :         return 0;
    6145             : }
    6146             : 
    6147             : int
    6148          51 : bdev_nvme_create(struct spdk_nvme_transport_id *trid,
    6149             :                  const char *base_name,
    6150             :                  const char **names,
    6151             :                  uint32_t count,
    6152             :                  spdk_bdev_create_nvme_fn cb_fn,
    6153             :                  void *cb_ctx,
    6154             :                  struct spdk_nvme_ctrlr_opts *drv_opts,
    6155             :                  struct nvme_ctrlr_opts *bdev_opts,
    6156             :                  bool multipath)
    6157             : {
    6158             :         struct nvme_probe_skip_entry *entry, *tmp;
    6159             :         struct nvme_async_probe_ctx *ctx;
    6160             :         spdk_nvme_attach_cb attach_cb;
    6161             :         int rc, len;
    6162             : 
    6163             :         /* TODO expand this check to include both the host and target TRIDs.
    6164             :          * Only if both are the same should we fail.
    6165             :          */
    6166          51 :         if (nvme_ctrlr_get(trid) != NULL) {
    6167           0 :                 SPDK_ERRLOG("A controller with the provided trid (traddr: %s) already exists.\n", trid->traddr);
    6168           0 :                 return -EEXIST;
    6169             :         }
    6170             : 
    6171          51 :         len = strnlen(base_name, SPDK_CONTROLLER_NAME_MAX);
    6172             : 
    6173          51 :         if (len == 0 || len == SPDK_CONTROLLER_NAME_MAX) {
    6174           0 :                 SPDK_ERRLOG("controller name must be between 1 and %d characters\n", SPDK_CONTROLLER_NAME_MAX - 1);
    6175           0 :                 return -EINVAL;
    6176             :         }
    6177             : 
    6178          51 :         if (bdev_opts != NULL &&
    6179           9 :             !bdev_nvme_check_io_error_resiliency_params(bdev_opts->ctrlr_loss_timeout_sec,
    6180             :                             bdev_opts->reconnect_delay_sec,
    6181             :                             bdev_opts->fast_io_fail_timeout_sec)) {
    6182           0 :                 return -EINVAL;
    6183             :         }
    6184             : 
    6185          51 :         ctx = calloc(1, sizeof(*ctx));
    6186          51 :         if (!ctx) {
    6187           0 :                 return -ENOMEM;
    6188             :         }
    6189          51 :         ctx->base_name = base_name;
    6190          51 :         ctx->names = names;
    6191          51 :         ctx->max_bdevs = count;
    6192          51 :         ctx->cb_fn = cb_fn;
    6193          51 :         ctx->cb_ctx = cb_ctx;
    6194          51 :         ctx->trid = *trid;
    6195             : 
    6196          51 :         if (bdev_opts) {
    6197           9 :                 memcpy(&ctx->bdev_opts, bdev_opts, sizeof(*bdev_opts));
    6198             :         } else {
    6199          42 :                 bdev_nvme_get_default_ctrlr_opts(&ctx->bdev_opts);
    6200             :         }
    6201             : 
    6202          51 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6203           0 :                 TAILQ_FOREACH_SAFE(entry, &g_skipped_nvme_ctrlrs, tailq, tmp) {
    6204           0 :                         if (spdk_nvme_transport_id_compare(trid, &entry->trid) == 0) {
    6205           0 :                                 TAILQ_REMOVE(&g_skipped_nvme_ctrlrs, entry, tailq);
    6206           0 :                                 free(entry);
    6207           0 :                                 break;
    6208             :                         }
    6209             :                 }
    6210             :         }
    6211             : 
    6212          51 :         if (drv_opts) {
    6213           0 :                 memcpy(&ctx->drv_opts, drv_opts, sizeof(*drv_opts));
    6214             :         } else {
    6215          51 :                 spdk_nvme_ctrlr_get_default_ctrlr_opts(&ctx->drv_opts, sizeof(ctx->drv_opts));
    6216             :         }
    6217             : 
    6218          51 :         ctx->drv_opts.transport_retry_count = g_opts.transport_retry_count;
    6219          51 :         ctx->drv_opts.transport_ack_timeout = g_opts.transport_ack_timeout;
    6220          51 :         ctx->drv_opts.keep_alive_timeout_ms = g_opts.keep_alive_timeout_ms;
    6221          51 :         ctx->drv_opts.disable_read_ana_log_page = true;
    6222          51 :         ctx->drv_opts.transport_tos = g_opts.transport_tos;
    6223             : 
    6224          51 :         if (ctx->bdev_opts.psk[0] != '\0') {
    6225             :                 /* Try to use the keyring first */
    6226           0 :                 ctx->drv_opts.tls_psk = spdk_keyring_get_key(ctx->bdev_opts.psk);
    6227           0 :                 if (ctx->drv_opts.tls_psk == NULL) {
    6228           0 :                         rc = bdev_nvme_load_psk(ctx->bdev_opts.psk,
    6229           0 :                                                 ctx->drv_opts.psk, sizeof(ctx->drv_opts.psk));
    6230           0 :                         if (rc != 0) {
    6231           0 :                                 SPDK_ERRLOG("Could not load PSK from %s\n", ctx->bdev_opts.psk);
    6232           0 :                                 free_nvme_async_probe_ctx(ctx);
    6233           0 :                                 return rc;
    6234             :                         }
    6235             :                 }
    6236             :         }
    6237             : 
    6238          51 :         if (ctx->bdev_opts.dhchap_key != NULL) {
    6239           0 :                 ctx->drv_opts.dhchap_key = spdk_keyring_get_key(ctx->bdev_opts.dhchap_key);
    6240           0 :                 if (ctx->drv_opts.dhchap_key == NULL) {
    6241           0 :                         SPDK_ERRLOG("Could not load DH-HMAC-CHAP key: %s\n",
    6242             :                                     ctx->bdev_opts.dhchap_key);
    6243           0 :                         free_nvme_async_probe_ctx(ctx);
    6244           0 :                         return -ENOKEY;
    6245             :                 }
    6246             : 
    6247           0 :                 ctx->drv_opts.dhchap_digests = g_opts.dhchap_digests;
    6248           0 :                 ctx->drv_opts.dhchap_dhgroups = g_opts.dhchap_dhgroups;
    6249             :         }
    6250          51 :         if (ctx->bdev_opts.dhchap_ctrlr_key != NULL) {
    6251           0 :                 ctx->drv_opts.dhchap_ctrlr_key =
    6252           0 :                         spdk_keyring_get_key(ctx->bdev_opts.dhchap_ctrlr_key);
    6253           0 :                 if (ctx->drv_opts.dhchap_ctrlr_key == NULL) {
    6254           0 :                         SPDK_ERRLOG("Could not load DH-HMAC-CHAP controller key: %s\n",
    6255             :                                     ctx->bdev_opts.dhchap_ctrlr_key);
    6256           0 :                         free_nvme_async_probe_ctx(ctx);
    6257           0 :                         return -ENOKEY;
    6258             :                 }
    6259             :         }
    6260             : 
    6261          51 :         if (nvme_bdev_ctrlr_get_by_name(base_name) == NULL || multipath) {
    6262          47 :                 attach_cb = connect_attach_cb;
    6263             :         } else {
    6264           4 :                 attach_cb = connect_set_failover_cb;
    6265             :         }
    6266             : 
    6267          51 :         ctx->probe_ctx = spdk_nvme_connect_async(trid, &ctx->drv_opts, attach_cb);
    6268          51 :         if (ctx->probe_ctx == NULL) {
    6269           0 :                 SPDK_ERRLOG("No controller was found with provided trid (traddr: %s)\n", trid->traddr);
    6270           0 :                 free_nvme_async_probe_ctx(ctx);
    6271           0 :                 return -ENODEV;
    6272             :         }
    6273          51 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_nvme_async_poll, ctx, 1000);
    6274             : 
    6275          51 :         return 0;
    6276             : }
    6277             : 
    6278             : struct bdev_nvme_delete_ctx {
    6279             :         char                        *name;
    6280             :         struct nvme_path_id         path_id;
    6281             :         bdev_nvme_delete_done_fn    delete_done;
    6282             :         void                        *delete_done_ctx;
    6283             :         uint64_t                    timeout_ticks;
    6284             :         struct spdk_poller          *poller;
    6285             : };
    6286             : 
    6287             : static void
    6288           2 : free_bdev_nvme_delete_ctx(struct bdev_nvme_delete_ctx *ctx)
    6289             : {
    6290           2 :         if (ctx != NULL) {
    6291           1 :                 free(ctx->name);
    6292           1 :                 free(ctx);
    6293             :         }
    6294           2 : }
    6295             : 
    6296             : static bool
    6297          74 : nvme_path_id_compare(struct nvme_path_id *p, const struct nvme_path_id *path_id)
    6298             : {
    6299          74 :         if (path_id->trid.trtype != 0) {
    6300          21 :                 if (path_id->trid.trtype == SPDK_NVME_TRANSPORT_CUSTOM) {
    6301           0 :                         if (strcasecmp(path_id->trid.trstring, p->trid.trstring) != 0) {
    6302           0 :                                 return false;
    6303             :                         }
    6304             :                 } else {
    6305          21 :                         if (path_id->trid.trtype != p->trid.trtype) {
    6306           0 :                                 return false;
    6307             :                         }
    6308             :                 }
    6309             :         }
    6310             : 
    6311          74 :         if (!spdk_mem_all_zero(path_id->trid.traddr, sizeof(path_id->trid.traddr))) {
    6312          21 :                 if (strcasecmp(path_id->trid.traddr, p->trid.traddr) != 0) {
    6313          11 :                         return false;
    6314             :                 }
    6315             :         }
    6316             : 
    6317          63 :         if (path_id->trid.adrfam != 0) {
    6318           0 :                 if (path_id->trid.adrfam != p->trid.adrfam) {
    6319           0 :                         return false;
    6320             :                 }
    6321             :         }
    6322             : 
    6323          63 :         if (!spdk_mem_all_zero(path_id->trid.trsvcid, sizeof(path_id->trid.trsvcid))) {
    6324          10 :                 if (strcasecmp(path_id->trid.trsvcid, p->trid.trsvcid) != 0) {
    6325           0 :                         return false;
    6326             :                 }
    6327             :         }
    6328             : 
    6329          63 :         if (!spdk_mem_all_zero(path_id->trid.subnqn, sizeof(path_id->trid.subnqn))) {
    6330          10 :                 if (strcmp(path_id->trid.subnqn, p->trid.subnqn) != 0) {
    6331           0 :                         return false;
    6332             :                 }
    6333             :         }
    6334             : 
    6335          63 :         if (!spdk_mem_all_zero(path_id->hostid.hostaddr, sizeof(path_id->hostid.hostaddr))) {
    6336           0 :                 if (strcmp(path_id->hostid.hostaddr, p->hostid.hostaddr) != 0) {
    6337           0 :                         return false;
    6338             :                 }
    6339             :         }
    6340             : 
    6341          63 :         if (!spdk_mem_all_zero(path_id->hostid.hostsvcid, sizeof(path_id->hostid.hostsvcid))) {
    6342           0 :                 if (strcmp(path_id->hostid.hostsvcid, p->hostid.hostsvcid) != 0) {
    6343           0 :                         return false;
    6344             :                 }
    6345             :         }
    6346             : 
    6347          63 :         return true;
    6348             : }
    6349             : 
    6350             : static bool
    6351           2 : nvme_path_id_exists(const char *name, const struct nvme_path_id *path_id)
    6352             : {
    6353             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
    6354             :         struct nvme_ctrlr       *ctrlr;
    6355             :         struct nvme_path_id     *p;
    6356             : 
    6357           2 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    6358           2 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    6359           2 :         if (!nbdev_ctrlr) {
    6360           1 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6361           1 :                 return false;
    6362             :         }
    6363             : 
    6364           1 :         TAILQ_FOREACH(ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    6365           1 :                 pthread_mutex_lock(&ctrlr->mutex);
    6366           1 :                 TAILQ_FOREACH(p, &ctrlr->trids, link) {
    6367           1 :                         if (nvme_path_id_compare(p, path_id)) {
    6368           1 :                                 pthread_mutex_unlock(&ctrlr->mutex);
    6369           1 :                                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6370           1 :                                 return true;
    6371             :                         }
    6372             :                 }
    6373           0 :                 pthread_mutex_unlock(&ctrlr->mutex);
    6374             :         }
    6375           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6376             : 
    6377           0 :         return false;
    6378             : }
    6379             : 
    6380             : static int
    6381           2 : bdev_nvme_delete_complete_poll(void *arg)
    6382             : {
    6383           2 :         struct bdev_nvme_delete_ctx     *ctx = arg;
    6384           2 :         int                             rc = 0;
    6385             : 
    6386           2 :         if (nvme_path_id_exists(ctx->name, &ctx->path_id)) {
    6387           1 :                 if (ctx->timeout_ticks > spdk_get_ticks()) {
    6388           1 :                         return SPDK_POLLER_BUSY;
    6389             :                 }
    6390             : 
    6391           0 :                 SPDK_ERRLOG("NVMe path '%s' still exists after delete\n", ctx->name);
    6392           0 :                 rc = -ETIMEDOUT;
    6393             :         }
    6394             : 
    6395           1 :         spdk_poller_unregister(&ctx->poller);
    6396             : 
    6397           1 :         ctx->delete_done(ctx->delete_done_ctx, rc);
    6398           1 :         free_bdev_nvme_delete_ctx(ctx);
    6399             : 
    6400           1 :         return SPDK_POLLER_BUSY;
    6401             : }
    6402             : 
    6403             : static int
    6404          63 : _bdev_nvme_delete(struct nvme_ctrlr *nvme_ctrlr, const struct nvme_path_id *path_id)
    6405             : {
    6406             :         struct nvme_path_id     *p, *t;
    6407             :         spdk_msg_fn             msg_fn;
    6408          63 :         int                     rc = -ENXIO;
    6409             : 
    6410          63 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6411             : 
    6412          73 :         TAILQ_FOREACH_REVERSE_SAFE(p, &nvme_ctrlr->trids, nvme_paths, link, t) {
    6413          73 :                 if (p == TAILQ_FIRST(&nvme_ctrlr->trids)) {
    6414          63 :                         break;
    6415             :                 }
    6416             : 
    6417          10 :                 if (!nvme_path_id_compare(p, path_id)) {
    6418           3 :                         continue;
    6419             :                 }
    6420             : 
    6421             :                 /* We are not using the specified path. */
    6422           7 :                 TAILQ_REMOVE(&nvme_ctrlr->trids, p, link);
    6423           7 :                 free(p);
    6424           7 :                 rc = 0;
    6425             :         }
    6426             : 
    6427          63 :         if (p == NULL || !nvme_path_id_compare(p, path_id)) {
    6428           8 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6429           8 :                 return rc;
    6430             :         }
    6431             : 
    6432             :         /* If we made it here, then this path is a match! Now we need to remove it. */
    6433             : 
    6434             :         /* This is the active path in use right now. The active path is always the first in the list. */
    6435          55 :         assert(p == nvme_ctrlr->active_path_id);
    6436             : 
    6437          55 :         if (!TAILQ_NEXT(p, link)) {
    6438             :                 /* The current path is the only path. */
    6439          54 :                 msg_fn = _nvme_ctrlr_destruct;
    6440          54 :                 rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, false);
    6441             :         } else {
    6442             :                 /* There is an alternative path. */
    6443           1 :                 msg_fn = _bdev_nvme_reset_ctrlr;
    6444           1 :                 rc = bdev_nvme_failover_ctrlr_unsafe(nvme_ctrlr, true);
    6445             :         }
    6446             : 
    6447          55 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6448             : 
    6449          55 :         if (rc == 0) {
    6450          55 :                 spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    6451           0 :         } else if (rc == -EALREADY) {
    6452           0 :                 rc = 0;
    6453             :         }
    6454             : 
    6455          55 :         return rc;
    6456             : }
    6457             : 
    6458             : int
    6459          48 : bdev_nvme_delete(const char *name, const struct nvme_path_id *path_id,
    6460             :                  bdev_nvme_delete_done_fn delete_done, void *delete_done_ctx)
    6461             : {
    6462             :         struct nvme_bdev_ctrlr          *nbdev_ctrlr;
    6463             :         struct nvme_ctrlr               *nvme_ctrlr, *tmp_nvme_ctrlr;
    6464          48 :         struct bdev_nvme_delete_ctx     *ctx = NULL;
    6465          48 :         int                             rc = -ENXIO, _rc;
    6466             : 
    6467          48 :         if (name == NULL || path_id == NULL) {
    6468           0 :                 rc = -EINVAL;
    6469           0 :                 goto exit;
    6470             :         }
    6471             : 
    6472          48 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    6473             : 
    6474          48 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    6475          48 :         if (nbdev_ctrlr == NULL) {
    6476           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6477             : 
    6478           0 :                 SPDK_ERRLOG("Failed to find NVMe bdev controller\n");
    6479           0 :                 rc = -ENODEV;
    6480           0 :                 goto exit;
    6481             :         }
    6482             : 
    6483         111 :         TAILQ_FOREACH_SAFE(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq, tmp_nvme_ctrlr) {
    6484          63 :                 _rc = _bdev_nvme_delete(nvme_ctrlr, path_id);
    6485          63 :                 if (_rc < 0 && _rc != -ENXIO) {
    6486           0 :                         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6487           0 :                         rc = _rc;
    6488           0 :                         goto exit;
    6489          63 :                 } else if (_rc == 0) {
    6490             :                         /* We traverse all remaining nvme_ctrlrs even if one nvme_ctrlr
    6491             :                          * was deleted successfully. To remember the successful deletion,
    6492             :                          * overwrite rc only if _rc is zero.
    6493             :                          */
    6494          57 :                         rc = 0;
    6495             :                 }
    6496             :         }
    6497             : 
    6498          48 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6499             : 
    6500          48 :         if (rc != 0 || delete_done == NULL) {
    6501          47 :                 goto exit;
    6502             :         }
    6503             : 
    6504           1 :         ctx = calloc(1, sizeof(*ctx));
    6505           1 :         if (ctx == NULL) {
    6506           0 :                 SPDK_ERRLOG("Failed to allocate context for bdev_nvme_delete\n");
    6507           0 :                 rc = -ENOMEM;
    6508           0 :                 goto exit;
    6509             :         }
    6510             : 
    6511           1 :         ctx->name = strdup(name);
    6512           1 :         if (ctx->name == NULL) {
    6513           0 :                 SPDK_ERRLOG("Failed to copy controller name for deletion\n");
    6514           0 :                 rc = -ENOMEM;
    6515           0 :                 goto exit;
    6516             :         }
    6517             : 
    6518           1 :         ctx->delete_done = delete_done;
    6519           1 :         ctx->delete_done_ctx = delete_done_ctx;
    6520           1 :         ctx->path_id = *path_id;
    6521           1 :         ctx->timeout_ticks = spdk_get_ticks() + 10 * spdk_get_ticks_hz();
    6522           1 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_nvme_delete_complete_poll, ctx, 1000);
    6523           1 :         if (ctx->poller == NULL) {
    6524           0 :                 SPDK_ERRLOG("Failed to register bdev_nvme_delete poller\n");
    6525           0 :                 rc = -ENOMEM;
    6526           0 :                 goto exit;
    6527             :         }
    6528             : 
    6529           1 : exit:
    6530          48 :         if (rc != 0) {
    6531           1 :                 free_bdev_nvme_delete_ctx(ctx);
    6532             :         }
    6533             : 
    6534          48 :         return rc;
    6535             : }
    6536             : 
    6537             : #define DISCOVERY_INFOLOG(ctx, format, ...) \
    6538             :         SPDK_INFOLOG(bdev_nvme, "Discovery[%s:%s] " format, ctx->trid.traddr, ctx->trid.trsvcid, ##__VA_ARGS__);
    6539             : 
    6540             : #define DISCOVERY_ERRLOG(ctx, format, ...) \
    6541             :         SPDK_ERRLOG("Discovery[%s:%s] " format, ctx->trid.traddr, ctx->trid.trsvcid, ##__VA_ARGS__);
    6542             : 
    6543             : struct discovery_entry_ctx {
    6544             :         char                                            name[128];
    6545             :         struct spdk_nvme_transport_id                   trid;
    6546             :         struct spdk_nvme_ctrlr_opts                     drv_opts;
    6547             :         struct spdk_nvmf_discovery_log_page_entry       entry;
    6548             :         TAILQ_ENTRY(discovery_entry_ctx)                tailq;
    6549             :         struct discovery_ctx                            *ctx;
    6550             : };
    6551             : 
    6552             : struct discovery_ctx {
    6553             :         char                                    *name;
    6554             :         spdk_bdev_nvme_start_discovery_fn       start_cb_fn;
    6555             :         spdk_bdev_nvme_stop_discovery_fn        stop_cb_fn;
    6556             :         void                                    *cb_ctx;
    6557             :         struct spdk_nvme_probe_ctx              *probe_ctx;
    6558             :         struct spdk_nvme_detach_ctx             *detach_ctx;
    6559             :         struct spdk_nvme_ctrlr                  *ctrlr;
    6560             :         struct spdk_nvme_transport_id           trid;
    6561             :         struct discovery_entry_ctx              *entry_ctx_in_use;
    6562             :         struct spdk_poller                      *poller;
    6563             :         struct spdk_nvme_ctrlr_opts             drv_opts;
    6564             :         struct nvme_ctrlr_opts                  bdev_opts;
    6565             :         struct spdk_nvmf_discovery_log_page     *log_page;
    6566             :         TAILQ_ENTRY(discovery_ctx)              tailq;
    6567             :         TAILQ_HEAD(, discovery_entry_ctx)       nvm_entry_ctxs;
    6568             :         TAILQ_HEAD(, discovery_entry_ctx)       discovery_entry_ctxs;
    6569             :         int                                     rc;
    6570             :         bool                                    wait_for_attach;
    6571             :         uint64_t                                timeout_ticks;
    6572             :         /* Denotes that the discovery service is being started. We're waiting
    6573             :          * for the initial connection to the discovery controller to be
    6574             :          * established and attach discovered NVM ctrlrs.
    6575             :          */
    6576             :         bool                                    initializing;
    6577             :         /* Denotes if a discovery is currently in progress for this context.
    6578             :          * That includes connecting to newly discovered subsystems.  Used to
    6579             :          * ensure we do not start a new discovery until an existing one is
    6580             :          * complete.
    6581             :          */
    6582             :         bool                                    in_progress;
    6583             : 
    6584             :         /* Denotes if another discovery is needed after the one in progress
    6585             :          * completes.  Set when we receive an AER completion while a discovery
    6586             :          * is already in progress.
    6587             :          */
    6588             :         bool                                    pending;
    6589             : 
    6590             :         /* Signal to the discovery context poller that it should stop the
    6591             :          * discovery service, including detaching from the current discovery
    6592             :          * controller.
    6593             :          */
    6594             :         bool                                    stop;
    6595             : 
    6596             :         struct spdk_thread                      *calling_thread;
    6597             :         uint32_t                                index;
    6598             :         uint32_t                                attach_in_progress;
    6599             :         char                                    *hostnqn;
    6600             : 
    6601             :         /* Denotes if the discovery service was started by the mdns discovery.
    6602             :          */
    6603             :         bool                                    from_mdns_discovery_service;
    6604             : };
    6605             : 
    6606             : TAILQ_HEAD(discovery_ctxs, discovery_ctx);
    6607             : static struct discovery_ctxs g_discovery_ctxs = TAILQ_HEAD_INITIALIZER(g_discovery_ctxs);
    6608             : 
    6609             : static void get_discovery_log_page(struct discovery_ctx *ctx);
    6610             : 
    6611             : static void
    6612           0 : free_discovery_ctx(struct discovery_ctx *ctx)
    6613             : {
    6614           0 :         free(ctx->log_page);
    6615           0 :         free(ctx->hostnqn);
    6616           0 :         free(ctx->name);
    6617           0 :         free(ctx);
    6618           0 : }
    6619             : 
    6620             : static void
    6621           0 : discovery_complete(struct discovery_ctx *ctx)
    6622             : {
    6623           0 :         ctx->initializing = false;
    6624           0 :         ctx->in_progress = false;
    6625           0 :         if (ctx->pending) {
    6626           0 :                 ctx->pending = false;
    6627           0 :                 get_discovery_log_page(ctx);
    6628             :         }
    6629           0 : }
    6630             : 
    6631             : static void
    6632           0 : build_trid_from_log_page_entry(struct spdk_nvme_transport_id *trid,
    6633             :                                struct spdk_nvmf_discovery_log_page_entry *entry)
    6634             : {
    6635             :         char *space;
    6636             : 
    6637           0 :         trid->trtype = entry->trtype;
    6638           0 :         trid->adrfam = entry->adrfam;
    6639           0 :         memcpy(trid->traddr, entry->traddr, sizeof(entry->traddr));
    6640           0 :         memcpy(trid->trsvcid, entry->trsvcid, sizeof(entry->trsvcid));
    6641             :         /* Because the source buffer (entry->subnqn) is longer than trid->subnqn, and
    6642             :          * before call to this function trid->subnqn is zeroed out, we need
    6643             :          * to copy sizeof(trid->subnqn) minus one byte to make sure the last character
    6644             :          * remains 0. Then we can shorten the string (replace ' ' with 0) if required
    6645             :          */
    6646           0 :         memcpy(trid->subnqn, entry->subnqn, sizeof(trid->subnqn) - 1);
    6647             : 
    6648             :         /* We want the traddr, trsvcid and subnqn fields to be NULL-terminated.
    6649             :          * But the log page entries typically pad them with spaces, not zeroes.
    6650             :          * So add a NULL terminator to each of these fields at the appropriate
    6651             :          * location.
    6652             :          */
    6653           0 :         space = strchr(trid->traddr, ' ');
    6654           0 :         if (space) {
    6655           0 :                 *space = 0;
    6656             :         }
    6657           0 :         space = strchr(trid->trsvcid, ' ');
    6658           0 :         if (space) {
    6659           0 :                 *space = 0;
    6660             :         }
    6661           0 :         space = strchr(trid->subnqn, ' ');
    6662           0 :         if (space) {
    6663           0 :                 *space = 0;
    6664             :         }
    6665           0 : }
    6666             : 
    6667             : static void
    6668           0 : _stop_discovery(void *_ctx)
    6669             : {
    6670           0 :         struct discovery_ctx *ctx = _ctx;
    6671             : 
    6672           0 :         if (ctx->attach_in_progress > 0) {
    6673           0 :                 spdk_thread_send_msg(spdk_get_thread(), _stop_discovery, ctx);
    6674           0 :                 return;
    6675             :         }
    6676             : 
    6677           0 :         ctx->stop = true;
    6678             : 
    6679           0 :         while (!TAILQ_EMPTY(&ctx->nvm_entry_ctxs)) {
    6680             :                 struct discovery_entry_ctx *entry_ctx;
    6681           0 :                 struct nvme_path_id path = {};
    6682             : 
    6683           0 :                 entry_ctx = TAILQ_FIRST(&ctx->nvm_entry_ctxs);
    6684           0 :                 path.trid = entry_ctx->trid;
    6685           0 :                 bdev_nvme_delete(entry_ctx->name, &path, NULL, NULL);
    6686           0 :                 TAILQ_REMOVE(&ctx->nvm_entry_ctxs, entry_ctx, tailq);
    6687           0 :                 free(entry_ctx);
    6688             :         }
    6689             : 
    6690           0 :         while (!TAILQ_EMPTY(&ctx->discovery_entry_ctxs)) {
    6691             :                 struct discovery_entry_ctx *entry_ctx;
    6692             : 
    6693           0 :                 entry_ctx = TAILQ_FIRST(&ctx->discovery_entry_ctxs);
    6694           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, entry_ctx, tailq);
    6695           0 :                 free(entry_ctx);
    6696             :         }
    6697             : 
    6698           0 :         free(ctx->entry_ctx_in_use);
    6699           0 :         ctx->entry_ctx_in_use = NULL;
    6700             : }
    6701             : 
    6702             : static void
    6703           0 : stop_discovery(struct discovery_ctx *ctx, spdk_bdev_nvme_stop_discovery_fn cb_fn, void *cb_ctx)
    6704             : {
    6705           0 :         ctx->stop_cb_fn = cb_fn;
    6706           0 :         ctx->cb_ctx = cb_ctx;
    6707             : 
    6708           0 :         if (ctx->attach_in_progress > 0) {
    6709           0 :                 DISCOVERY_INFOLOG(ctx, "stopping discovery with attach_in_progress: %"PRIu32"\n",
    6710             :                                   ctx->attach_in_progress);
    6711             :         }
    6712             : 
    6713           0 :         _stop_discovery(ctx);
    6714           0 : }
    6715             : 
    6716             : static void
    6717           2 : remove_discovery_entry(struct nvme_ctrlr *nvme_ctrlr)
    6718             : {
    6719             :         struct discovery_ctx *d_ctx;
    6720             :         struct nvme_path_id *path_id;
    6721           2 :         struct spdk_nvme_transport_id trid = {};
    6722             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    6723             : 
    6724           2 :         path_id = TAILQ_FIRST(&nvme_ctrlr->trids);
    6725             : 
    6726           2 :         TAILQ_FOREACH(d_ctx, &g_discovery_ctxs, tailq) {
    6727           0 :                 TAILQ_FOREACH_SAFE(entry_ctx, &d_ctx->nvm_entry_ctxs, tailq, tmp) {
    6728           0 :                         build_trid_from_log_page_entry(&trid, &entry_ctx->entry);
    6729           0 :                         if (spdk_nvme_transport_id_compare(&trid, &path_id->trid) != 0) {
    6730           0 :                                 continue;
    6731             :                         }
    6732             : 
    6733           0 :                         TAILQ_REMOVE(&d_ctx->nvm_entry_ctxs, entry_ctx, tailq);
    6734           0 :                         free(entry_ctx);
    6735           0 :                         DISCOVERY_INFOLOG(d_ctx, "Remove discovery entry: %s:%s:%s\n",
    6736             :                                           trid.subnqn, trid.traddr, trid.trsvcid);
    6737             : 
    6738             :                         /* Fail discovery ctrlr to force reattach attempt */
    6739           0 :                         spdk_nvme_ctrlr_fail(d_ctx->ctrlr);
    6740             :                 }
    6741             :         }
    6742           2 : }
    6743             : 
    6744             : static void
    6745           0 : discovery_remove_controllers(struct discovery_ctx *ctx)
    6746             : {
    6747           0 :         struct spdk_nvmf_discovery_log_page *log_page = ctx->log_page;
    6748             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    6749             :         struct spdk_nvmf_discovery_log_page_entry *new_entry, *old_entry;
    6750           0 :         struct spdk_nvme_transport_id old_trid = {};
    6751             :         uint64_t numrec, i;
    6752             :         bool found;
    6753             : 
    6754           0 :         numrec = from_le64(&log_page->numrec);
    6755           0 :         TAILQ_FOREACH_SAFE(entry_ctx, &ctx->nvm_entry_ctxs, tailq, tmp) {
    6756           0 :                 found = false;
    6757           0 :                 old_entry = &entry_ctx->entry;
    6758           0 :                 build_trid_from_log_page_entry(&old_trid, old_entry);
    6759           0 :                 for (i = 0; i < numrec; i++) {
    6760           0 :                         new_entry = &log_page->entries[i];
    6761           0 :                         if (!memcmp(old_entry, new_entry, sizeof(*old_entry))) {
    6762           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s found again\n",
    6763             :                                                   old_trid.subnqn, old_trid.traddr, old_trid.trsvcid);
    6764           0 :                                 found = true;
    6765           0 :                                 break;
    6766             :                         }
    6767             :                 }
    6768           0 :                 if (!found) {
    6769           0 :                         struct nvme_path_id path = {};
    6770             : 
    6771           0 :                         DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s not found\n",
    6772             :                                           old_trid.subnqn, old_trid.traddr, old_trid.trsvcid);
    6773             : 
    6774           0 :                         path.trid = entry_ctx->trid;
    6775           0 :                         bdev_nvme_delete(entry_ctx->name, &path, NULL, NULL);
    6776           0 :                         TAILQ_REMOVE(&ctx->nvm_entry_ctxs, entry_ctx, tailq);
    6777           0 :                         free(entry_ctx);
    6778             :                 }
    6779             :         }
    6780           0 :         free(log_page);
    6781           0 :         ctx->log_page = NULL;
    6782           0 :         discovery_complete(ctx);
    6783           0 : }
    6784             : 
    6785             : static void
    6786           0 : complete_discovery_start(struct discovery_ctx *ctx, int status)
    6787             : {
    6788           0 :         ctx->timeout_ticks = 0;
    6789           0 :         ctx->rc = status;
    6790           0 :         if (ctx->start_cb_fn) {
    6791           0 :                 ctx->start_cb_fn(ctx->cb_ctx, status);
    6792           0 :                 ctx->start_cb_fn = NULL;
    6793           0 :                 ctx->cb_ctx = NULL;
    6794             :         }
    6795           0 : }
    6796             : 
    6797             : static void
    6798           0 : discovery_attach_controller_done(void *cb_ctx, size_t bdev_count, int rc)
    6799             : {
    6800           0 :         struct discovery_entry_ctx *entry_ctx = cb_ctx;
    6801           0 :         struct discovery_ctx *ctx = entry_ctx->ctx;
    6802             : 
    6803           0 :         DISCOVERY_INFOLOG(ctx, "attach %s done\n", entry_ctx->name);
    6804           0 :         ctx->attach_in_progress--;
    6805           0 :         if (ctx->attach_in_progress == 0) {
    6806           0 :                 complete_discovery_start(ctx, ctx->rc);
    6807           0 :                 if (ctx->initializing && ctx->rc != 0) {
    6808           0 :                         DISCOVERY_ERRLOG(ctx, "stopping discovery due to errors: %d\n", ctx->rc);
    6809           0 :                         stop_discovery(ctx, NULL, ctx->cb_ctx);
    6810             :                 } else {
    6811           0 :                         discovery_remove_controllers(ctx);
    6812             :                 }
    6813             :         }
    6814           0 : }
    6815             : 
    6816             : static struct discovery_entry_ctx *
    6817           0 : create_discovery_entry_ctx(struct discovery_ctx *ctx, struct spdk_nvme_transport_id *trid)
    6818             : {
    6819             :         struct discovery_entry_ctx *new_ctx;
    6820             : 
    6821           0 :         new_ctx = calloc(1, sizeof(*new_ctx));
    6822           0 :         if (new_ctx == NULL) {
    6823           0 :                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    6824           0 :                 return NULL;
    6825             :         }
    6826             : 
    6827           0 :         new_ctx->ctx = ctx;
    6828           0 :         memcpy(&new_ctx->trid, trid, sizeof(*trid));
    6829           0 :         spdk_nvme_ctrlr_get_default_ctrlr_opts(&new_ctx->drv_opts, sizeof(new_ctx->drv_opts));
    6830           0 :         snprintf(new_ctx->drv_opts.hostnqn, sizeof(new_ctx->drv_opts.hostnqn), "%s", ctx->hostnqn);
    6831           0 :         return new_ctx;
    6832             : }
    6833             : 
    6834             : static void
    6835           0 : discovery_log_page_cb(void *cb_arg, int rc, const struct spdk_nvme_cpl *cpl,
    6836             :                       struct spdk_nvmf_discovery_log_page *log_page)
    6837             : {
    6838           0 :         struct discovery_ctx *ctx = cb_arg;
    6839             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    6840             :         struct spdk_nvmf_discovery_log_page_entry *new_entry, *old_entry;
    6841             :         uint64_t numrec, i;
    6842             :         bool found;
    6843             : 
    6844           0 :         if (rc || spdk_nvme_cpl_is_error(cpl)) {
    6845           0 :                 DISCOVERY_ERRLOG(ctx, "could not get discovery log page\n");
    6846           0 :                 return;
    6847             :         }
    6848             : 
    6849           0 :         ctx->log_page = log_page;
    6850           0 :         assert(ctx->attach_in_progress == 0);
    6851           0 :         numrec = from_le64(&log_page->numrec);
    6852           0 :         TAILQ_FOREACH_SAFE(entry_ctx, &ctx->discovery_entry_ctxs, tailq, tmp) {
    6853           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, entry_ctx, tailq);
    6854           0 :                 free(entry_ctx);
    6855             :         }
    6856           0 :         for (i = 0; i < numrec; i++) {
    6857           0 :                 found = false;
    6858           0 :                 new_entry = &log_page->entries[i];
    6859           0 :                 if (new_entry->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY_CURRENT ||
    6860           0 :                     new_entry->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY) {
    6861             :                         struct discovery_entry_ctx *new_ctx;
    6862           0 :                         struct spdk_nvme_transport_id trid = {};
    6863             : 
    6864           0 :                         build_trid_from_log_page_entry(&trid, new_entry);
    6865           0 :                         new_ctx = create_discovery_entry_ctx(ctx, &trid);
    6866           0 :                         if (new_ctx == NULL) {
    6867           0 :                                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    6868           0 :                                 break;
    6869             :                         }
    6870             : 
    6871           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, new_ctx, tailq);
    6872           0 :                         continue;
    6873             :                 }
    6874           0 :                 TAILQ_FOREACH(entry_ctx, &ctx->nvm_entry_ctxs, tailq) {
    6875           0 :                         old_entry = &entry_ctx->entry;
    6876           0 :                         if (!memcmp(new_entry, old_entry, sizeof(*new_entry))) {
    6877           0 :                                 found = true;
    6878           0 :                                 break;
    6879             :                         }
    6880             :                 }
    6881           0 :                 if (!found) {
    6882           0 :                         struct discovery_entry_ctx *subnqn_ctx = NULL, *new_ctx;
    6883             :                         struct discovery_ctx *d_ctx;
    6884             : 
    6885           0 :                         TAILQ_FOREACH(d_ctx, &g_discovery_ctxs, tailq) {
    6886           0 :                                 TAILQ_FOREACH(subnqn_ctx, &d_ctx->nvm_entry_ctxs, tailq) {
    6887           0 :                                         if (!memcmp(subnqn_ctx->entry.subnqn, new_entry->subnqn,
    6888             :                                                     sizeof(new_entry->subnqn))) {
    6889           0 :                                                 break;
    6890             :                                         }
    6891             :                                 }
    6892           0 :                                 if (subnqn_ctx) {
    6893           0 :                                         break;
    6894             :                                 }
    6895             :                         }
    6896             : 
    6897           0 :                         new_ctx = calloc(1, sizeof(*new_ctx));
    6898           0 :                         if (new_ctx == NULL) {
    6899           0 :                                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    6900           0 :                                 break;
    6901             :                         }
    6902             : 
    6903           0 :                         new_ctx->ctx = ctx;
    6904           0 :                         memcpy(&new_ctx->entry, new_entry, sizeof(*new_entry));
    6905           0 :                         build_trid_from_log_page_entry(&new_ctx->trid, new_entry);
    6906           0 :                         if (subnqn_ctx) {
    6907           0 :                                 snprintf(new_ctx->name, sizeof(new_ctx->name), "%s", subnqn_ctx->name);
    6908           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s new path for %s\n",
    6909             :                                                   new_ctx->trid.subnqn, new_ctx->trid.traddr, new_ctx->trid.trsvcid,
    6910             :                                                   new_ctx->name);
    6911             :                         } else {
    6912           0 :                                 snprintf(new_ctx->name, sizeof(new_ctx->name), "%s%d", ctx->name, ctx->index++);
    6913           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s new subsystem %s\n",
    6914             :                                                   new_ctx->trid.subnqn, new_ctx->trid.traddr, new_ctx->trid.trsvcid,
    6915             :                                                   new_ctx->name);
    6916             :                         }
    6917           0 :                         spdk_nvme_ctrlr_get_default_ctrlr_opts(&new_ctx->drv_opts, sizeof(new_ctx->drv_opts));
    6918           0 :                         snprintf(new_ctx->drv_opts.hostnqn, sizeof(new_ctx->drv_opts.hostnqn), "%s", ctx->hostnqn);
    6919           0 :                         rc = bdev_nvme_create(&new_ctx->trid, new_ctx->name, NULL, 0,
    6920             :                                               discovery_attach_controller_done, new_ctx,
    6921             :                                               &new_ctx->drv_opts, &ctx->bdev_opts, true);
    6922           0 :                         if (rc == 0) {
    6923           0 :                                 TAILQ_INSERT_TAIL(&ctx->nvm_entry_ctxs, new_ctx, tailq);
    6924           0 :                                 ctx->attach_in_progress++;
    6925             :                         } else {
    6926           0 :                                 DISCOVERY_ERRLOG(ctx, "bdev_nvme_create failed (%s)\n", spdk_strerror(-rc));
    6927             :                         }
    6928             :                 }
    6929             :         }
    6930             : 
    6931           0 :         if (ctx->attach_in_progress == 0) {
    6932           0 :                 discovery_remove_controllers(ctx);
    6933             :         }
    6934             : }
    6935             : 
    6936             : static void
    6937           0 : get_discovery_log_page(struct discovery_ctx *ctx)
    6938             : {
    6939             :         int rc;
    6940             : 
    6941           0 :         assert(ctx->in_progress == false);
    6942           0 :         ctx->in_progress = true;
    6943           0 :         rc = spdk_nvme_ctrlr_get_discovery_log_page(ctx->ctrlr, discovery_log_page_cb, ctx);
    6944           0 :         if (rc != 0) {
    6945           0 :                 DISCOVERY_ERRLOG(ctx, "could not get discovery log page\n");
    6946             :         }
    6947           0 :         DISCOVERY_INFOLOG(ctx, "sent discovery log page command\n");
    6948           0 : }
    6949             : 
    6950             : static void
    6951           0 : discovery_aer_cb(void *arg, const struct spdk_nvme_cpl *cpl)
    6952             : {
    6953           0 :         struct discovery_ctx *ctx = arg;
    6954           0 :         uint32_t log_page_id = (cpl->cdw0 & 0xFF0000) >> 16;
    6955             : 
    6956           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    6957           0 :                 DISCOVERY_ERRLOG(ctx, "aer failed\n");
    6958           0 :                 return;
    6959             :         }
    6960             : 
    6961           0 :         if (log_page_id != SPDK_NVME_LOG_DISCOVERY) {
    6962           0 :                 DISCOVERY_ERRLOG(ctx, "unexpected log page 0x%x\n", log_page_id);
    6963           0 :                 return;
    6964             :         }
    6965             : 
    6966           0 :         DISCOVERY_INFOLOG(ctx, "got aer\n");
    6967           0 :         if (ctx->in_progress) {
    6968           0 :                 ctx->pending = true;
    6969           0 :                 return;
    6970             :         }
    6971             : 
    6972           0 :         get_discovery_log_page(ctx);
    6973             : }
    6974             : 
    6975             : static void
    6976           0 : discovery_attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    6977             :                     struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
    6978             : {
    6979           0 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6980             :         struct discovery_ctx *ctx;
    6981             : 
    6982           0 :         ctx = SPDK_CONTAINEROF(user_opts, struct discovery_ctx, drv_opts);
    6983             : 
    6984           0 :         DISCOVERY_INFOLOG(ctx, "discovery ctrlr attached\n");
    6985           0 :         ctx->probe_ctx = NULL;
    6986           0 :         ctx->ctrlr = ctrlr;
    6987             : 
    6988           0 :         if (ctx->rc != 0) {
    6989           0 :                 DISCOVERY_ERRLOG(ctx, "encountered error while attaching discovery ctrlr: %d\n",
    6990             :                                  ctx->rc);
    6991           0 :                 return;
    6992             :         }
    6993             : 
    6994           0 :         spdk_nvme_ctrlr_register_aer_callback(ctx->ctrlr, discovery_aer_cb, ctx);
    6995             : }
    6996             : 
    6997             : static int
    6998           0 : discovery_poller(void *arg)
    6999             : {
    7000           0 :         struct discovery_ctx *ctx = arg;
    7001             :         struct spdk_nvme_transport_id *trid;
    7002             :         int rc;
    7003             : 
    7004           0 :         if (ctx->detach_ctx) {
    7005           0 :                 rc = spdk_nvme_detach_poll_async(ctx->detach_ctx);
    7006           0 :                 if (rc != -EAGAIN) {
    7007           0 :                         ctx->detach_ctx = NULL;
    7008           0 :                         ctx->ctrlr = NULL;
    7009             :                 }
    7010           0 :         } else if (ctx->stop) {
    7011           0 :                 if (ctx->ctrlr != NULL) {
    7012           0 :                         rc = spdk_nvme_detach_async(ctx->ctrlr, &ctx->detach_ctx);
    7013           0 :                         if (rc == 0) {
    7014           0 :                                 return SPDK_POLLER_BUSY;
    7015             :                         }
    7016           0 :                         DISCOVERY_ERRLOG(ctx, "could not detach discovery ctrlr\n");
    7017             :                 }
    7018           0 :                 spdk_poller_unregister(&ctx->poller);
    7019           0 :                 TAILQ_REMOVE(&g_discovery_ctxs, ctx, tailq);
    7020           0 :                 assert(ctx->start_cb_fn == NULL);
    7021           0 :                 if (ctx->stop_cb_fn != NULL) {
    7022           0 :                         ctx->stop_cb_fn(ctx->cb_ctx);
    7023             :                 }
    7024           0 :                 free_discovery_ctx(ctx);
    7025           0 :         } else if (ctx->probe_ctx == NULL && ctx->ctrlr == NULL) {
    7026           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7027           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching discovery ctrlr\n");
    7028           0 :                         assert(ctx->initializing);
    7029           0 :                         spdk_poller_unregister(&ctx->poller);
    7030           0 :                         TAILQ_REMOVE(&g_discovery_ctxs, ctx, tailq);
    7031           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7032           0 :                         stop_discovery(ctx, NULL, NULL);
    7033           0 :                         free_discovery_ctx(ctx);
    7034           0 :                         return SPDK_POLLER_BUSY;
    7035             :                 }
    7036             : 
    7037           0 :                 assert(ctx->entry_ctx_in_use == NULL);
    7038           0 :                 ctx->entry_ctx_in_use = TAILQ_FIRST(&ctx->discovery_entry_ctxs);
    7039           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7040           0 :                 trid = &ctx->entry_ctx_in_use->trid;
    7041           0 :                 ctx->probe_ctx = spdk_nvme_connect_async(trid, &ctx->drv_opts, discovery_attach_cb);
    7042           0 :                 if (ctx->probe_ctx) {
    7043           0 :                         spdk_poller_unregister(&ctx->poller);
    7044           0 :                         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000);
    7045             :                 } else {
    7046           0 :                         DISCOVERY_ERRLOG(ctx, "could not start discovery connect\n");
    7047           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7048           0 :                         ctx->entry_ctx_in_use = NULL;
    7049             :                 }
    7050           0 :         } else if (ctx->probe_ctx) {
    7051           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7052           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching discovery ctrlr\n");
    7053           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7054           0 :                         return SPDK_POLLER_BUSY;
    7055             :                 }
    7056             : 
    7057           0 :                 rc = spdk_nvme_probe_poll_async(ctx->probe_ctx);
    7058           0 :                 if (rc != -EAGAIN) {
    7059           0 :                         if (ctx->rc != 0) {
    7060           0 :                                 assert(ctx->initializing);
    7061           0 :                                 stop_discovery(ctx, NULL, ctx->cb_ctx);
    7062             :                         } else {
    7063           0 :                                 assert(rc == 0);
    7064           0 :                                 DISCOVERY_INFOLOG(ctx, "discovery ctrlr connected\n");
    7065           0 :                                 ctx->rc = rc;
    7066           0 :                                 get_discovery_log_page(ctx);
    7067             :                         }
    7068             :                 }
    7069             :         } else {
    7070           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7071           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching NVM ctrlrs\n");
    7072           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7073             :                         /* We need to wait until all NVM ctrlrs are attached before we stop the
    7074             :                          * discovery service to make sure we don't detach a ctrlr that is still
    7075             :                          * being attached.
    7076             :                          */
    7077           0 :                         if (ctx->attach_in_progress == 0) {
    7078           0 :                                 stop_discovery(ctx, NULL, ctx->cb_ctx);
    7079           0 :                                 return SPDK_POLLER_BUSY;
    7080             :                         }
    7081             :                 }
    7082             : 
    7083           0 :                 rc = spdk_nvme_ctrlr_process_admin_completions(ctx->ctrlr);
    7084           0 :                 if (rc < 0) {
    7085           0 :                         spdk_poller_unregister(&ctx->poller);
    7086           0 :                         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000 * 1000);
    7087           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7088           0 :                         ctx->entry_ctx_in_use = NULL;
    7089             : 
    7090           0 :                         rc = spdk_nvme_detach_async(ctx->ctrlr, &ctx->detach_ctx);
    7091           0 :                         if (rc != 0) {
    7092           0 :                                 DISCOVERY_ERRLOG(ctx, "could not detach discovery ctrlr\n");
    7093           0 :                                 ctx->ctrlr = NULL;
    7094             :                         }
    7095             :                 }
    7096             :         }
    7097             : 
    7098           0 :         return SPDK_POLLER_BUSY;
    7099             : }
    7100             : 
    7101             : static void
    7102           0 : start_discovery_poller(void *arg)
    7103             : {
    7104           0 :         struct discovery_ctx *ctx = arg;
    7105             : 
    7106           0 :         TAILQ_INSERT_TAIL(&g_discovery_ctxs, ctx, tailq);
    7107           0 :         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000 * 1000);
    7108           0 : }
    7109             : 
    7110             : int
    7111           0 : bdev_nvme_start_discovery(struct spdk_nvme_transport_id *trid,
    7112             :                           const char *base_name,
    7113             :                           struct spdk_nvme_ctrlr_opts *drv_opts,
    7114             :                           struct nvme_ctrlr_opts *bdev_opts,
    7115             :                           uint64_t attach_timeout,
    7116             :                           bool from_mdns,
    7117             :                           spdk_bdev_nvme_start_discovery_fn cb_fn, void *cb_ctx)
    7118             : {
    7119             :         struct discovery_ctx *ctx;
    7120             :         struct discovery_entry_ctx *discovery_entry_ctx;
    7121             : 
    7122           0 :         snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
    7123           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7124           0 :                 if (strcmp(ctx->name, base_name) == 0) {
    7125           0 :                         return -EEXIST;
    7126             :                 }
    7127             : 
    7128           0 :                 if (ctx->entry_ctx_in_use != NULL) {
    7129           0 :                         if (!spdk_nvme_transport_id_compare(trid, &ctx->entry_ctx_in_use->trid)) {
    7130           0 :                                 return -EEXIST;
    7131             :                         }
    7132             :                 }
    7133             : 
    7134           0 :                 TAILQ_FOREACH(discovery_entry_ctx, &ctx->discovery_entry_ctxs, tailq) {
    7135           0 :                         if (!spdk_nvme_transport_id_compare(trid, &discovery_entry_ctx->trid)) {
    7136           0 :                                 return -EEXIST;
    7137             :                         }
    7138             :                 }
    7139             :         }
    7140             : 
    7141           0 :         ctx = calloc(1, sizeof(*ctx));
    7142           0 :         if (ctx == NULL) {
    7143           0 :                 return -ENOMEM;
    7144             :         }
    7145             : 
    7146           0 :         ctx->name = strdup(base_name);
    7147           0 :         if (ctx->name == NULL) {
    7148           0 :                 free_discovery_ctx(ctx);
    7149           0 :                 return -ENOMEM;
    7150             :         }
    7151           0 :         memcpy(&ctx->drv_opts, drv_opts, sizeof(*drv_opts));
    7152           0 :         memcpy(&ctx->bdev_opts, bdev_opts, sizeof(*bdev_opts));
    7153           0 :         ctx->from_mdns_discovery_service = from_mdns;
    7154           0 :         ctx->bdev_opts.from_discovery_service = true;
    7155           0 :         ctx->calling_thread = spdk_get_thread();
    7156           0 :         ctx->start_cb_fn = cb_fn;
    7157           0 :         ctx->cb_ctx = cb_ctx;
    7158           0 :         ctx->initializing = true;
    7159           0 :         if (ctx->start_cb_fn) {
    7160             :                 /* We can use this when dumping json to denote if this RPC parameter
    7161             :                  * was specified or not.
    7162             :                  */
    7163           0 :                 ctx->wait_for_attach = true;
    7164             :         }
    7165           0 :         if (attach_timeout != 0) {
    7166           0 :                 ctx->timeout_ticks = spdk_get_ticks() + attach_timeout *
    7167           0 :                                      spdk_get_ticks_hz() / 1000ull;
    7168             :         }
    7169           0 :         TAILQ_INIT(&ctx->nvm_entry_ctxs);
    7170           0 :         TAILQ_INIT(&ctx->discovery_entry_ctxs);
    7171           0 :         memcpy(&ctx->trid, trid, sizeof(*trid));
    7172             :         /* Even if user did not specify hostnqn, we can still strdup("\0"); */
    7173           0 :         ctx->hostnqn = strdup(ctx->drv_opts.hostnqn);
    7174           0 :         if (ctx->hostnqn == NULL) {
    7175           0 :                 free_discovery_ctx(ctx);
    7176           0 :                 return -ENOMEM;
    7177             :         }
    7178           0 :         discovery_entry_ctx = create_discovery_entry_ctx(ctx, trid);
    7179           0 :         if (discovery_entry_ctx == NULL) {
    7180           0 :                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7181           0 :                 free_discovery_ctx(ctx);
    7182           0 :                 return -ENOMEM;
    7183             :         }
    7184             : 
    7185           0 :         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, discovery_entry_ctx, tailq);
    7186           0 :         spdk_thread_send_msg(g_bdev_nvme_init_thread, start_discovery_poller, ctx);
    7187           0 :         return 0;
    7188             : }
    7189             : 
    7190             : int
    7191           0 : bdev_nvme_stop_discovery(const char *name, spdk_bdev_nvme_stop_discovery_fn cb_fn, void *cb_ctx)
    7192             : {
    7193             :         struct discovery_ctx *ctx;
    7194             : 
    7195           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7196           0 :                 if (strcmp(name, ctx->name) == 0) {
    7197           0 :                         if (ctx->stop) {
    7198           0 :                                 return -EALREADY;
    7199             :                         }
    7200             :                         /* If we're still starting the discovery service and ->rc is non-zero, we're
    7201             :                          * going to stop it as soon as we can
    7202             :                          */
    7203           0 :                         if (ctx->initializing && ctx->rc != 0) {
    7204           0 :                                 return -EALREADY;
    7205             :                         }
    7206           0 :                         stop_discovery(ctx, cb_fn, cb_ctx);
    7207           0 :                         return 0;
    7208             :                 }
    7209             :         }
    7210             : 
    7211           0 :         return -ENOENT;
    7212             : }
    7213             : 
    7214             : static int
    7215           1 : bdev_nvme_library_init(void)
    7216             : {
    7217           1 :         g_bdev_nvme_init_thread = spdk_get_thread();
    7218             : 
    7219           1 :         spdk_io_device_register(&g_nvme_bdev_ctrlrs, bdev_nvme_create_poll_group_cb,
    7220             :                                 bdev_nvme_destroy_poll_group_cb,
    7221             :                                 sizeof(struct nvme_poll_group),  "nvme_poll_groups");
    7222             : 
    7223           1 :         return 0;
    7224             : }
    7225             : 
    7226             : static void
    7227           1 : bdev_nvme_fini_destruct_ctrlrs(void)
    7228             : {
    7229             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    7230             :         struct nvme_ctrlr *nvme_ctrlr;
    7231             : 
    7232           1 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    7233           1 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
    7234           0 :                 TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    7235           0 :                         pthread_mutex_lock(&nvme_ctrlr->mutex);
    7236           0 :                         if (nvme_ctrlr->destruct) {
    7237             :                                 /* This controller's destruction was already started
    7238             :                                  * before the application started shutting down
    7239             :                                  */
    7240           0 :                                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    7241           0 :                                 continue;
    7242             :                         }
    7243           0 :                         nvme_ctrlr->destruct = true;
    7244           0 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    7245             : 
    7246           0 :                         spdk_thread_send_msg(nvme_ctrlr->thread, _nvme_ctrlr_destruct,
    7247             :                                              nvme_ctrlr);
    7248             :                 }
    7249             :         }
    7250             : 
    7251           1 :         g_bdev_nvme_module_finish = true;
    7252           1 :         if (TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    7253           1 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    7254           1 :                 spdk_io_device_unregister(&g_nvme_bdev_ctrlrs, NULL);
    7255           1 :                 spdk_bdev_module_fini_done();
    7256           1 :                 return;
    7257             :         }
    7258             : 
    7259           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    7260             : }
    7261             : 
    7262             : static void
    7263           0 : check_discovery_fini(void *arg)
    7264             : {
    7265           0 :         if (TAILQ_EMPTY(&g_discovery_ctxs)) {
    7266           0 :                 bdev_nvme_fini_destruct_ctrlrs();
    7267             :         }
    7268           0 : }
    7269             : 
    7270             : static void
    7271           1 : bdev_nvme_library_fini(void)
    7272             : {
    7273             :         struct nvme_probe_skip_entry *entry, *entry_tmp;
    7274             :         struct discovery_ctx *ctx;
    7275             : 
    7276           1 :         spdk_poller_unregister(&g_hotplug_poller);
    7277           1 :         free(g_hotplug_probe_ctx);
    7278           1 :         g_hotplug_probe_ctx = NULL;
    7279             : 
    7280           1 :         TAILQ_FOREACH_SAFE(entry, &g_skipped_nvme_ctrlrs, tailq, entry_tmp) {
    7281           0 :                 TAILQ_REMOVE(&g_skipped_nvme_ctrlrs, entry, tailq);
    7282           0 :                 free(entry);
    7283             :         }
    7284             : 
    7285           1 :         assert(spdk_get_thread() == g_bdev_nvme_init_thread);
    7286           1 :         if (TAILQ_EMPTY(&g_discovery_ctxs)) {
    7287           1 :                 bdev_nvme_fini_destruct_ctrlrs();
    7288             :         } else {
    7289           0 :                 TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7290           0 :                         stop_discovery(ctx, check_discovery_fini, NULL);
    7291             :                 }
    7292             :         }
    7293           1 : }
    7294             : 
    7295             : static void
    7296           0 : bdev_nvme_verify_pi_error(struct nvme_bdev_io *bio)
    7297             : {
    7298           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7299           0 :         struct spdk_bdev *bdev = bdev_io->bdev;
    7300           0 :         struct spdk_dif_ctx dif_ctx;
    7301           0 :         struct spdk_dif_error err_blk = {};
    7302             :         int rc;
    7303           0 :         struct spdk_dif_ctx_init_ext_opts dif_opts;
    7304             : 
    7305           0 :         dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
    7306           0 :         dif_opts.dif_pi_format = SPDK_DIF_PI_FORMAT_16;
    7307           0 :         rc = spdk_dif_ctx_init(&dif_ctx,
    7308           0 :                                bdev->blocklen, bdev->md_len, bdev->md_interleave,
    7309           0 :                                bdev->dif_is_head_of_md, bdev->dif_type,
    7310             :                                bdev_io->u.bdev.dif_check_flags,
    7311           0 :                                bdev_io->u.bdev.offset_blocks, 0, 0, 0, 0, &dif_opts);
    7312           0 :         if (rc != 0) {
    7313           0 :                 SPDK_ERRLOG("Initialization of DIF context failed\n");
    7314           0 :                 return;
    7315             :         }
    7316             : 
    7317           0 :         if (bdev->md_interleave) {
    7318           0 :                 rc = spdk_dif_verify(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    7319           0 :                                      bdev_io->u.bdev.num_blocks, &dif_ctx, &err_blk);
    7320             :         } else {
    7321           0 :                 struct iovec md_iov = {
    7322           0 :                         .iov_base       = bdev_io->u.bdev.md_buf,
    7323           0 :                         .iov_len        = bdev_io->u.bdev.num_blocks * bdev->md_len,
    7324             :                 };
    7325             : 
    7326           0 :                 rc = spdk_dix_verify(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    7327           0 :                                      &md_iov, bdev_io->u.bdev.num_blocks, &dif_ctx, &err_blk);
    7328             :         }
    7329             : 
    7330           0 :         if (rc != 0) {
    7331           0 :                 SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n",
    7332             :                             err_blk.err_type, err_blk.err_offset);
    7333             :         } else {
    7334           0 :                 SPDK_ERRLOG("Hardware reported PI error but SPDK could not find any.\n");
    7335             :         }
    7336             : }
    7337             : 
    7338             : static void
    7339           0 : bdev_nvme_no_pi_readv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7340             : {
    7341           0 :         struct nvme_bdev_io *bio = ref;
    7342             : 
    7343           0 :         if (spdk_nvme_cpl_is_success(cpl)) {
    7344             :                 /* Run PI verification for read data buffer. */
    7345           0 :                 bdev_nvme_verify_pi_error(bio);
    7346             :         }
    7347             : 
    7348             :         /* Return original completion status */
    7349           0 :         bdev_nvme_io_complete_nvme_status(bio, &bio->cpl);
    7350           0 : }
    7351             : 
    7352             : static void
    7353           3 : bdev_nvme_readv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7354             : {
    7355           3 :         struct nvme_bdev_io *bio = ref;
    7356           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7357             :         int ret;
    7358             : 
    7359           3 :         if (spdk_unlikely(spdk_nvme_cpl_is_pi_error(cpl))) {
    7360           0 :                 SPDK_ERRLOG("readv completed with PI error (sct=%d, sc=%d)\n",
    7361             :                             cpl->status.sct, cpl->status.sc);
    7362             : 
    7363             :                 /* Save completion status to use after verifying PI error. */
    7364           0 :                 bio->cpl = *cpl;
    7365             : 
    7366           0 :                 if (spdk_likely(nvme_io_path_is_available(bio->io_path))) {
    7367             :                         /* Read without PI checking to verify PI error. */
    7368           0 :                         ret = bdev_nvme_no_pi_readv(bio,
    7369             :                                                     bdev_io->u.bdev.iovs,
    7370             :                                                     bdev_io->u.bdev.iovcnt,
    7371             :                                                     bdev_io->u.bdev.md_buf,
    7372             :                                                     bdev_io->u.bdev.num_blocks,
    7373             :                                                     bdev_io->u.bdev.offset_blocks);
    7374           0 :                         if (ret == 0) {
    7375           0 :                                 return;
    7376             :                         }
    7377             :                 }
    7378             :         }
    7379             : 
    7380           3 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7381             : }
    7382             : 
    7383             : static void
    7384          25 : bdev_nvme_writev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7385             : {
    7386          25 :         struct nvme_bdev_io *bio = ref;
    7387             : 
    7388          25 :         if (spdk_unlikely(spdk_nvme_cpl_is_pi_error(cpl))) {
    7389           0 :                 SPDK_ERRLOG("writev completed with PI error (sct=%d, sc=%d)\n",
    7390             :                             cpl->status.sct, cpl->status.sc);
    7391             :                 /* Run PI verification for write data buffer if PI error is detected. */
    7392           0 :                 bdev_nvme_verify_pi_error(bio);
    7393             :         }
    7394             : 
    7395          25 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7396          25 : }
    7397             : 
    7398             : static void
    7399           0 : bdev_nvme_zone_appendv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7400             : {
    7401           0 :         struct nvme_bdev_io *bio = ref;
    7402           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7403             : 
    7404             :         /* spdk_bdev_io_get_append_location() requires that the ALBA is stored in offset_blocks.
    7405             :          * Additionally, offset_blocks has to be set before calling bdev_nvme_verify_pi_error().
    7406             :          */
    7407           0 :         bdev_io->u.bdev.offset_blocks = *(uint64_t *)&cpl->cdw0;
    7408             : 
    7409           0 :         if (spdk_nvme_cpl_is_pi_error(cpl)) {
    7410           0 :                 SPDK_ERRLOG("zone append completed with PI error (sct=%d, sc=%d)\n",
    7411             :                             cpl->status.sct, cpl->status.sc);
    7412             :                 /* Run PI verification for zone append data buffer if PI error is detected. */
    7413           0 :                 bdev_nvme_verify_pi_error(bio);
    7414             :         }
    7415             : 
    7416           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7417           0 : }
    7418             : 
    7419             : static void
    7420           1 : bdev_nvme_comparev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7421             : {
    7422           1 :         struct nvme_bdev_io *bio = ref;
    7423             : 
    7424           1 :         if (spdk_nvme_cpl_is_pi_error(cpl)) {
    7425           0 :                 SPDK_ERRLOG("comparev completed with PI error (sct=%d, sc=%d)\n",
    7426             :                             cpl->status.sct, cpl->status.sc);
    7427             :                 /* Run PI verification for compare data buffer if PI error is detected. */
    7428           0 :                 bdev_nvme_verify_pi_error(bio);
    7429             :         }
    7430             : 
    7431           1 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7432           1 : }
    7433             : 
    7434             : static void
    7435           4 : bdev_nvme_comparev_and_writev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7436             : {
    7437           4 :         struct nvme_bdev_io *bio = ref;
    7438             : 
    7439             :         /* Compare operation completion */
    7440           4 :         if (!bio->first_fused_completed) {
    7441             :                 /* Save compare result for write callback */
    7442           2 :                 bio->cpl = *cpl;
    7443           2 :                 bio->first_fused_completed = true;
    7444           2 :                 return;
    7445             :         }
    7446             : 
    7447             :         /* Write operation completion */
    7448           2 :         if (spdk_nvme_cpl_is_error(&bio->cpl)) {
    7449             :                 /* If bio->cpl is already an error, it means the compare operation failed.  In that case,
    7450             :                  * complete the IO with the compare operation's status.
    7451             :                  */
    7452           1 :                 if (!spdk_nvme_cpl_is_error(cpl)) {
    7453           1 :                         SPDK_ERRLOG("Unexpected write success after compare failure.\n");
    7454             :                 }
    7455             : 
    7456           1 :                 bdev_nvme_io_complete_nvme_status(bio, &bio->cpl);
    7457             :         } else {
    7458           1 :                 bdev_nvme_io_complete_nvme_status(bio, cpl);
    7459             :         }
    7460             : }
    7461             : 
    7462             : static void
    7463           1 : bdev_nvme_queued_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7464             : {
    7465           1 :         struct nvme_bdev_io *bio = ref;
    7466             : 
    7467           1 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7468           1 : }
    7469             : 
    7470             : static int
    7471           0 : fill_zone_from_report(struct spdk_bdev_zone_info *info, struct spdk_nvme_zns_zone_desc *desc)
    7472             : {
    7473           0 :         switch (desc->zt) {
    7474           0 :         case SPDK_NVME_ZONE_TYPE_SEQWR:
    7475           0 :                 info->type = SPDK_BDEV_ZONE_TYPE_SEQWR;
    7476           0 :                 break;
    7477           0 :         default:
    7478           0 :                 SPDK_ERRLOG("Invalid zone type: %#x in zone report\n", desc->zt);
    7479           0 :                 return -EIO;
    7480             :         }
    7481             : 
    7482           0 :         switch (desc->zs) {
    7483           0 :         case SPDK_NVME_ZONE_STATE_EMPTY:
    7484           0 :                 info->state = SPDK_BDEV_ZONE_STATE_EMPTY;
    7485           0 :                 break;
    7486           0 :         case SPDK_NVME_ZONE_STATE_IOPEN:
    7487           0 :                 info->state = SPDK_BDEV_ZONE_STATE_IMP_OPEN;
    7488           0 :                 break;
    7489           0 :         case SPDK_NVME_ZONE_STATE_EOPEN:
    7490           0 :                 info->state = SPDK_BDEV_ZONE_STATE_EXP_OPEN;
    7491           0 :                 break;
    7492           0 :         case SPDK_NVME_ZONE_STATE_CLOSED:
    7493           0 :                 info->state = SPDK_BDEV_ZONE_STATE_CLOSED;
    7494           0 :                 break;
    7495           0 :         case SPDK_NVME_ZONE_STATE_RONLY:
    7496           0 :                 info->state = SPDK_BDEV_ZONE_STATE_READ_ONLY;
    7497           0 :                 break;
    7498           0 :         case SPDK_NVME_ZONE_STATE_FULL:
    7499           0 :                 info->state = SPDK_BDEV_ZONE_STATE_FULL;
    7500           0 :                 break;
    7501           0 :         case SPDK_NVME_ZONE_STATE_OFFLINE:
    7502           0 :                 info->state = SPDK_BDEV_ZONE_STATE_OFFLINE;
    7503           0 :                 break;
    7504           0 :         default:
    7505           0 :                 SPDK_ERRLOG("Invalid zone state: %#x in zone report\n", desc->zs);
    7506           0 :                 return -EIO;
    7507             :         }
    7508             : 
    7509           0 :         info->zone_id = desc->zslba;
    7510           0 :         info->write_pointer = desc->wp;
    7511           0 :         info->capacity = desc->zcap;
    7512             : 
    7513           0 :         return 0;
    7514             : }
    7515             : 
    7516             : static void
    7517           0 : bdev_nvme_get_zone_info_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7518             : {
    7519           0 :         struct nvme_bdev_io *bio = ref;
    7520           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7521           0 :         uint64_t zone_id = bdev_io->u.zone_mgmt.zone_id;
    7522           0 :         uint32_t zones_to_copy = bdev_io->u.zone_mgmt.num_zones;
    7523           0 :         struct spdk_bdev_zone_info *info = bdev_io->u.zone_mgmt.buf;
    7524             :         uint64_t max_zones_per_buf, i;
    7525             :         uint32_t zone_report_bufsize;
    7526             :         struct spdk_nvme_ns *ns;
    7527             :         struct spdk_nvme_qpair *qpair;
    7528             :         int ret;
    7529             : 
    7530           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    7531           0 :                 goto out_complete_io_nvme_cpl;
    7532             :         }
    7533             : 
    7534           0 :         if (spdk_unlikely(!nvme_io_path_is_available(bio->io_path))) {
    7535           0 :                 ret = -ENXIO;
    7536           0 :                 goto out_complete_io_ret;
    7537             :         }
    7538             : 
    7539           0 :         ns = bio->io_path->nvme_ns->ns;
    7540           0 :         qpair = bio->io_path->qpair->qpair;
    7541             : 
    7542           0 :         zone_report_bufsize = spdk_nvme_ns_get_max_io_xfer_size(ns);
    7543           0 :         max_zones_per_buf = (zone_report_bufsize - sizeof(*bio->zone_report_buf)) /
    7544             :                             sizeof(bio->zone_report_buf->descs[0]);
    7545             : 
    7546           0 :         if (bio->zone_report_buf->nr_zones > max_zones_per_buf) {
    7547           0 :                 ret = -EINVAL;
    7548           0 :                 goto out_complete_io_ret;
    7549             :         }
    7550             : 
    7551           0 :         if (!bio->zone_report_buf->nr_zones) {
    7552           0 :                 ret = -EINVAL;
    7553           0 :                 goto out_complete_io_ret;
    7554             :         }
    7555             : 
    7556           0 :         for (i = 0; i < bio->zone_report_buf->nr_zones && bio->handled_zones < zones_to_copy; i++) {
    7557           0 :                 ret = fill_zone_from_report(&info[bio->handled_zones],
    7558           0 :                                             &bio->zone_report_buf->descs[i]);
    7559           0 :                 if (ret) {
    7560           0 :                         goto out_complete_io_ret;
    7561             :                 }
    7562           0 :                 bio->handled_zones++;
    7563             :         }
    7564             : 
    7565           0 :         if (bio->handled_zones < zones_to_copy) {
    7566           0 :                 uint64_t zone_size_lba = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    7567           0 :                 uint64_t slba = zone_id + (zone_size_lba * bio->handled_zones);
    7568             : 
    7569           0 :                 memset(bio->zone_report_buf, 0, zone_report_bufsize);
    7570           0 :                 ret = spdk_nvme_zns_report_zones(ns, qpair,
    7571           0 :                                                  bio->zone_report_buf, zone_report_bufsize,
    7572             :                                                  slba, SPDK_NVME_ZRA_LIST_ALL, true,
    7573             :                                                  bdev_nvme_get_zone_info_done, bio);
    7574           0 :                 if (!ret) {
    7575           0 :                         return;
    7576             :                 } else {
    7577           0 :                         goto out_complete_io_ret;
    7578             :                 }
    7579             :         }
    7580             : 
    7581           0 : out_complete_io_nvme_cpl:
    7582           0 :         free(bio->zone_report_buf);
    7583           0 :         bio->zone_report_buf = NULL;
    7584           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7585           0 :         return;
    7586             : 
    7587           0 : out_complete_io_ret:
    7588           0 :         free(bio->zone_report_buf);
    7589           0 :         bio->zone_report_buf = NULL;
    7590           0 :         bdev_nvme_io_complete(bio, ret);
    7591             : }
    7592             : 
    7593             : static void
    7594           0 : bdev_nvme_zone_management_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7595             : {
    7596           0 :         struct nvme_bdev_io *bio = ref;
    7597             : 
    7598           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7599           0 : }
    7600             : 
    7601             : static void
    7602           4 : bdev_nvme_admin_passthru_complete_nvme_status(void *ctx)
    7603             : {
    7604           4 :         struct nvme_bdev_io *bio = ctx;
    7605           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7606           4 :         const struct spdk_nvme_cpl *cpl = &bio->cpl;
    7607             : 
    7608           4 :         assert(bdev_nvme_io_type_is_admin(bdev_io->type));
    7609             : 
    7610           4 :         __bdev_nvme_io_complete(bdev_io, 0, cpl);
    7611           4 : }
    7612             : 
    7613             : static void
    7614           3 : bdev_nvme_abort_complete(void *ctx)
    7615             : {
    7616           3 :         struct nvme_bdev_io *bio = ctx;
    7617           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7618             : 
    7619           3 :         if (spdk_nvme_cpl_is_abort_success(&bio->cpl)) {
    7620           3 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS, NULL);
    7621             :         } else {
    7622           0 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED, NULL);
    7623             :         }
    7624           3 : }
    7625             : 
    7626             : static void
    7627           3 : bdev_nvme_abort_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7628             : {
    7629           3 :         struct nvme_bdev_io *bio = ref;
    7630           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7631             : 
    7632           3 :         bio->cpl = *cpl;
    7633           3 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io), bdev_nvme_abort_complete, bio);
    7634           3 : }
    7635             : 
    7636             : static void
    7637           4 : bdev_nvme_admin_passthru_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7638             : {
    7639           4 :         struct nvme_bdev_io *bio = ref;
    7640           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7641             : 
    7642           4 :         bio->cpl = *cpl;
    7643           4 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7644             :                              bdev_nvme_admin_passthru_complete_nvme_status, bio);
    7645           4 : }
    7646             : 
    7647             : static void
    7648           0 : bdev_nvme_queued_reset_sgl(void *ref, uint32_t sgl_offset)
    7649             : {
    7650           0 :         struct nvme_bdev_io *bio = ref;
    7651             :         struct iovec *iov;
    7652             : 
    7653           0 :         bio->iov_offset = sgl_offset;
    7654           0 :         for (bio->iovpos = 0; bio->iovpos < bio->iovcnt; bio->iovpos++) {
    7655           0 :                 iov = &bio->iovs[bio->iovpos];
    7656           0 :                 if (bio->iov_offset < iov->iov_len) {
    7657           0 :                         break;
    7658             :                 }
    7659             : 
    7660           0 :                 bio->iov_offset -= iov->iov_len;
    7661             :         }
    7662           0 : }
    7663             : 
    7664             : static int
    7665           0 : bdev_nvme_queued_next_sge(void *ref, void **address, uint32_t *length)
    7666             : {
    7667           0 :         struct nvme_bdev_io *bio = ref;
    7668             :         struct iovec *iov;
    7669             : 
    7670           0 :         assert(bio->iovpos < bio->iovcnt);
    7671             : 
    7672           0 :         iov = &bio->iovs[bio->iovpos];
    7673             : 
    7674           0 :         *address = iov->iov_base;
    7675           0 :         *length = iov->iov_len;
    7676             : 
    7677           0 :         if (bio->iov_offset) {
    7678           0 :                 assert(bio->iov_offset <= iov->iov_len);
    7679           0 :                 *address += bio->iov_offset;
    7680           0 :                 *length -= bio->iov_offset;
    7681             :         }
    7682             : 
    7683           0 :         bio->iov_offset += *length;
    7684           0 :         if (bio->iov_offset == iov->iov_len) {
    7685           0 :                 bio->iovpos++;
    7686           0 :                 bio->iov_offset = 0;
    7687             :         }
    7688             : 
    7689           0 :         return 0;
    7690             : }
    7691             : 
    7692             : static void
    7693           0 : bdev_nvme_queued_reset_fused_sgl(void *ref, uint32_t sgl_offset)
    7694             : {
    7695           0 :         struct nvme_bdev_io *bio = ref;
    7696             :         struct iovec *iov;
    7697             : 
    7698           0 :         bio->fused_iov_offset = sgl_offset;
    7699           0 :         for (bio->fused_iovpos = 0; bio->fused_iovpos < bio->fused_iovcnt; bio->fused_iovpos++) {
    7700           0 :                 iov = &bio->fused_iovs[bio->fused_iovpos];
    7701           0 :                 if (bio->fused_iov_offset < iov->iov_len) {
    7702           0 :                         break;
    7703             :                 }
    7704             : 
    7705           0 :                 bio->fused_iov_offset -= iov->iov_len;
    7706             :         }
    7707           0 : }
    7708             : 
    7709             : static int
    7710           0 : bdev_nvme_queued_next_fused_sge(void *ref, void **address, uint32_t *length)
    7711             : {
    7712           0 :         struct nvme_bdev_io *bio = ref;
    7713             :         struct iovec *iov;
    7714             : 
    7715           0 :         assert(bio->fused_iovpos < bio->fused_iovcnt);
    7716             : 
    7717           0 :         iov = &bio->fused_iovs[bio->fused_iovpos];
    7718             : 
    7719           0 :         *address = iov->iov_base;
    7720           0 :         *length = iov->iov_len;
    7721             : 
    7722           0 :         if (bio->fused_iov_offset) {
    7723           0 :                 assert(bio->fused_iov_offset <= iov->iov_len);
    7724           0 :                 *address += bio->fused_iov_offset;
    7725           0 :                 *length -= bio->fused_iov_offset;
    7726             :         }
    7727             : 
    7728           0 :         bio->fused_iov_offset += *length;
    7729           0 :         if (bio->fused_iov_offset == iov->iov_len) {
    7730           0 :                 bio->fused_iovpos++;
    7731           0 :                 bio->fused_iov_offset = 0;
    7732             :         }
    7733             : 
    7734           0 :         return 0;
    7735             : }
    7736             : 
    7737             : static int
    7738           0 : bdev_nvme_no_pi_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    7739             :                       void *md, uint64_t lba_count, uint64_t lba)
    7740             : {
    7741             :         int rc;
    7742             : 
    7743           0 :         SPDK_DEBUGLOG(bdev_nvme, "read %" PRIu64 " blocks with offset %#" PRIx64 " without PI check\n",
    7744             :                       lba_count, lba);
    7745             : 
    7746           0 :         bio->iovs = iov;
    7747           0 :         bio->iovcnt = iovcnt;
    7748           0 :         bio->iovpos = 0;
    7749           0 :         bio->iov_offset = 0;
    7750             : 
    7751           0 :         rc = spdk_nvme_ns_cmd_readv_with_md(bio->io_path->nvme_ns->ns,
    7752           0 :                                             bio->io_path->qpair->qpair,
    7753             :                                             lba, lba_count,
    7754             :                                             bdev_nvme_no_pi_readv_done, bio, 0,
    7755             :                                             bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    7756             :                                             md, 0, 0);
    7757             : 
    7758           0 :         if (rc != 0 && rc != -ENOMEM) {
    7759           0 :                 SPDK_ERRLOG("no_pi_readv failed: rc = %d\n", rc);
    7760             :         }
    7761           0 :         return rc;
    7762             : }
    7763             : 
    7764             : static int
    7765           3 : bdev_nvme_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    7766             :                 void *md, uint64_t lba_count, uint64_t lba, uint32_t flags,
    7767             :                 struct spdk_memory_domain *domain, void *domain_ctx,
    7768             :                 struct spdk_accel_sequence *seq)
    7769             : {
    7770           3 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    7771           3 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    7772             :         int rc;
    7773             : 
    7774           3 :         SPDK_DEBUGLOG(bdev_nvme, "read %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    7775             :                       lba_count, lba);
    7776             : 
    7777           3 :         bio->iovs = iov;
    7778           3 :         bio->iovcnt = iovcnt;
    7779           3 :         bio->iovpos = 0;
    7780           3 :         bio->iov_offset = 0;
    7781             : 
    7782           3 :         if (domain != NULL || seq != NULL) {
    7783           1 :                 bio->ext_opts.size = SPDK_SIZEOF(&bio->ext_opts, accel_sequence);
    7784           1 :                 bio->ext_opts.memory_domain = domain;
    7785           1 :                 bio->ext_opts.memory_domain_ctx = domain_ctx;
    7786           1 :                 bio->ext_opts.io_flags = flags;
    7787           1 :                 bio->ext_opts.metadata = md;
    7788           1 :                 bio->ext_opts.accel_sequence = seq;
    7789             : 
    7790           1 :                 if (iovcnt == 1) {
    7791           1 :                         rc = spdk_nvme_ns_cmd_read_ext(ns, qpair, iov[0].iov_base, lba, lba_count, bdev_nvme_readv_done,
    7792             :                                                        bio, &bio->ext_opts);
    7793             :                 } else {
    7794           0 :                         rc = spdk_nvme_ns_cmd_readv_ext(ns, qpair, lba, lba_count,
    7795             :                                                         bdev_nvme_readv_done, bio,
    7796             :                                                         bdev_nvme_queued_reset_sgl,
    7797             :                                                         bdev_nvme_queued_next_sge,
    7798             :                                                         &bio->ext_opts);
    7799             :                 }
    7800           2 :         } else if (iovcnt == 1) {
    7801           2 :                 rc = spdk_nvme_ns_cmd_read_with_md(ns, qpair, iov[0].iov_base,
    7802             :                                                    md, lba, lba_count, bdev_nvme_readv_done,
    7803             :                                                    bio, flags, 0, 0);
    7804             :         } else {
    7805           0 :                 rc = spdk_nvme_ns_cmd_readv_with_md(ns, qpair, lba, lba_count,
    7806             :                                                     bdev_nvme_readv_done, bio, flags,
    7807             :                                                     bdev_nvme_queued_reset_sgl,
    7808             :                                                     bdev_nvme_queued_next_sge, md, 0, 0);
    7809             :         }
    7810             : 
    7811           3 :         if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    7812           0 :                 SPDK_ERRLOG("readv failed: rc = %d\n", rc);
    7813             :         }
    7814           3 :         return rc;
    7815             : }
    7816             : 
    7817             : static int
    7818          25 : bdev_nvme_writev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    7819             :                  void *md, uint64_t lba_count, uint64_t lba, uint32_t flags,
    7820             :                  struct spdk_memory_domain *domain, void *domain_ctx,
    7821             :                  struct spdk_accel_sequence *seq,
    7822             :                  union spdk_bdev_nvme_cdw12 cdw12, union spdk_bdev_nvme_cdw13 cdw13)
    7823             : {
    7824          25 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    7825          25 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    7826             :         int rc;
    7827             : 
    7828          25 :         SPDK_DEBUGLOG(bdev_nvme, "write %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    7829             :                       lba_count, lba);
    7830             : 
    7831          25 :         bio->iovs = iov;
    7832          25 :         bio->iovcnt = iovcnt;
    7833          25 :         bio->iovpos = 0;
    7834          25 :         bio->iov_offset = 0;
    7835             : 
    7836          25 :         if (domain != NULL || seq != NULL) {
    7837           0 :                 bio->ext_opts.size = SPDK_SIZEOF(&bio->ext_opts, accel_sequence);
    7838           0 :                 bio->ext_opts.memory_domain = domain;
    7839           0 :                 bio->ext_opts.memory_domain_ctx = domain_ctx;
    7840           0 :                 bio->ext_opts.io_flags = flags | SPDK_NVME_IO_FLAGS_DIRECTIVE(cdw12.write.dtype);
    7841           0 :                 bio->ext_opts.cdw13 = cdw13.raw;
    7842           0 :                 bio->ext_opts.metadata = md;
    7843           0 :                 bio->ext_opts.accel_sequence = seq;
    7844             : 
    7845           0 :                 if (iovcnt == 1) {
    7846           0 :                         rc = spdk_nvme_ns_cmd_write_ext(ns, qpair, iov[0].iov_base, lba, lba_count, bdev_nvme_writev_done,
    7847             :                                                         bio, &bio->ext_opts);
    7848             :                 } else {
    7849           0 :                         rc = spdk_nvme_ns_cmd_writev_ext(ns, qpair, lba, lba_count,
    7850             :                                                          bdev_nvme_writev_done, bio,
    7851             :                                                          bdev_nvme_queued_reset_sgl,
    7852             :                                                          bdev_nvme_queued_next_sge,
    7853             :                                                          &bio->ext_opts);
    7854             :                 }
    7855          25 :         } else if (iovcnt == 1) {
    7856          25 :                 rc = spdk_nvme_ns_cmd_write_with_md(ns, qpair, iov[0].iov_base,
    7857             :                                                     md, lba, lba_count, bdev_nvme_writev_done,
    7858             :                                                     bio, flags, 0, 0);
    7859             :         } else {
    7860           0 :                 rc = spdk_nvme_ns_cmd_writev_with_md(ns, qpair, lba, lba_count,
    7861             :                                                      bdev_nvme_writev_done, bio, flags,
    7862             :                                                      bdev_nvme_queued_reset_sgl,
    7863             :                                                      bdev_nvme_queued_next_sge, md, 0, 0);
    7864             :         }
    7865             : 
    7866          25 :         if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    7867           0 :                 SPDK_ERRLOG("writev failed: rc = %d\n", rc);
    7868             :         }
    7869          25 :         return rc;
    7870             : }
    7871             : 
    7872             : static int
    7873           0 : bdev_nvme_zone_appendv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    7874             :                        void *md, uint64_t lba_count, uint64_t zslba,
    7875             :                        uint32_t flags)
    7876             : {
    7877           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    7878           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    7879             :         int rc;
    7880             : 
    7881           0 :         SPDK_DEBUGLOG(bdev_nvme, "zone append %" PRIu64 " blocks to zone start lba %#" PRIx64 "\n",
    7882             :                       lba_count, zslba);
    7883             : 
    7884           0 :         bio->iovs = iov;
    7885           0 :         bio->iovcnt = iovcnt;
    7886           0 :         bio->iovpos = 0;
    7887           0 :         bio->iov_offset = 0;
    7888             : 
    7889           0 :         if (iovcnt == 1) {
    7890           0 :                 rc = spdk_nvme_zns_zone_append_with_md(ns, qpair, iov[0].iov_base, md, zslba,
    7891             :                                                        lba_count,
    7892             :                                                        bdev_nvme_zone_appendv_done, bio,
    7893             :                                                        flags,
    7894             :                                                        0, 0);
    7895             :         } else {
    7896           0 :                 rc = spdk_nvme_zns_zone_appendv_with_md(ns, qpair, zslba, lba_count,
    7897             :                                                         bdev_nvme_zone_appendv_done, bio, flags,
    7898             :                                                         bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    7899             :                                                         md, 0, 0);
    7900             :         }
    7901             : 
    7902           0 :         if (rc != 0 && rc != -ENOMEM) {
    7903           0 :                 SPDK_ERRLOG("zone append failed: rc = %d\n", rc);
    7904             :         }
    7905           0 :         return rc;
    7906             : }
    7907             : 
    7908             : static int
    7909           1 : bdev_nvme_comparev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    7910             :                    void *md, uint64_t lba_count, uint64_t lba,
    7911             :                    uint32_t flags)
    7912             : {
    7913             :         int rc;
    7914             : 
    7915           1 :         SPDK_DEBUGLOG(bdev_nvme, "compare %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    7916             :                       lba_count, lba);
    7917             : 
    7918           1 :         bio->iovs = iov;
    7919           1 :         bio->iovcnt = iovcnt;
    7920           1 :         bio->iovpos = 0;
    7921           1 :         bio->iov_offset = 0;
    7922             : 
    7923           1 :         rc = spdk_nvme_ns_cmd_comparev_with_md(bio->io_path->nvme_ns->ns,
    7924           1 :                                                bio->io_path->qpair->qpair,
    7925             :                                                lba, lba_count,
    7926             :                                                bdev_nvme_comparev_done, bio, flags,
    7927             :                                                bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    7928             :                                                md, 0, 0);
    7929             : 
    7930           1 :         if (rc != 0 && rc != -ENOMEM) {
    7931           0 :                 SPDK_ERRLOG("comparev failed: rc = %d\n", rc);
    7932             :         }
    7933           1 :         return rc;
    7934             : }
    7935             : 
    7936             : static int
    7937           2 : bdev_nvme_comparev_and_writev(struct nvme_bdev_io *bio, struct iovec *cmp_iov, int cmp_iovcnt,
    7938             :                               struct iovec *write_iov, int write_iovcnt,
    7939             :                               void *md, uint64_t lba_count, uint64_t lba, uint32_t flags)
    7940             : {
    7941           2 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    7942           2 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    7943           2 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7944             :         int rc;
    7945             : 
    7946           2 :         SPDK_DEBUGLOG(bdev_nvme, "compare and write %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    7947             :                       lba_count, lba);
    7948             : 
    7949           2 :         bio->iovs = cmp_iov;
    7950           2 :         bio->iovcnt = cmp_iovcnt;
    7951           2 :         bio->iovpos = 0;
    7952           2 :         bio->iov_offset = 0;
    7953           2 :         bio->fused_iovs = write_iov;
    7954           2 :         bio->fused_iovcnt = write_iovcnt;
    7955           2 :         bio->fused_iovpos = 0;
    7956           2 :         bio->fused_iov_offset = 0;
    7957             : 
    7958           2 :         if (bdev_io->num_retries == 0) {
    7959           2 :                 bio->first_fused_submitted = false;
    7960           2 :                 bio->first_fused_completed = false;
    7961             :         }
    7962             : 
    7963           2 :         if (!bio->first_fused_submitted) {
    7964           2 :                 flags |= SPDK_NVME_IO_FLAGS_FUSE_FIRST;
    7965           2 :                 memset(&bio->cpl, 0, sizeof(bio->cpl));
    7966             : 
    7967           2 :                 rc = spdk_nvme_ns_cmd_comparev_with_md(ns, qpair, lba, lba_count,
    7968             :                                                        bdev_nvme_comparev_and_writev_done, bio, flags,
    7969             :                                                        bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge, md, 0, 0);
    7970           2 :                 if (rc == 0) {
    7971           2 :                         bio->first_fused_submitted = true;
    7972           2 :                         flags &= ~SPDK_NVME_IO_FLAGS_FUSE_FIRST;
    7973             :                 } else {
    7974           0 :                         if (rc != -ENOMEM) {
    7975           0 :                                 SPDK_ERRLOG("compare failed: rc = %d\n", rc);
    7976             :                         }
    7977           0 :                         return rc;
    7978             :                 }
    7979             :         }
    7980             : 
    7981           2 :         flags |= SPDK_NVME_IO_FLAGS_FUSE_SECOND;
    7982             : 
    7983           2 :         rc = spdk_nvme_ns_cmd_writev_with_md(ns, qpair, lba, lba_count,
    7984             :                                              bdev_nvme_comparev_and_writev_done, bio, flags,
    7985             :                                              bdev_nvme_queued_reset_fused_sgl, bdev_nvme_queued_next_fused_sge, md, 0, 0);
    7986           2 :         if (rc != 0 && rc != -ENOMEM) {
    7987           0 :                 SPDK_ERRLOG("write failed: rc = %d\n", rc);
    7988           0 :                 rc = 0;
    7989             :         }
    7990             : 
    7991           2 :         return rc;
    7992             : }
    7993             : 
    7994             : static int
    7995           1 : bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks, uint64_t num_blocks)
    7996             : {
    7997           1 :         struct spdk_nvme_dsm_range dsm_ranges[SPDK_NVME_DATASET_MANAGEMENT_MAX_RANGES];
    7998             :         struct spdk_nvme_dsm_range *range;
    7999             :         uint64_t offset, remaining;
    8000             :         uint64_t num_ranges_u64;
    8001             :         uint16_t num_ranges;
    8002             :         int rc;
    8003             : 
    8004           1 :         num_ranges_u64 = (num_blocks + SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS - 1) /
    8005             :                          SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8006           1 :         if (num_ranges_u64 > SPDK_COUNTOF(dsm_ranges)) {
    8007           0 :                 SPDK_ERRLOG("Unmap request for %" PRIu64 " blocks is too large\n", num_blocks);
    8008           0 :                 return -EINVAL;
    8009             :         }
    8010           1 :         num_ranges = (uint16_t)num_ranges_u64;
    8011             : 
    8012           1 :         offset = offset_blocks;
    8013           1 :         remaining = num_blocks;
    8014           1 :         range = &dsm_ranges[0];
    8015             : 
    8016             :         /* Fill max-size ranges until the remaining blocks fit into one range */
    8017           1 :         while (remaining > SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS) {
    8018           0 :                 range->attributes.raw = 0;
    8019           0 :                 range->length = SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8020           0 :                 range->starting_lba = offset;
    8021             : 
    8022           0 :                 offset += SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8023           0 :                 remaining -= SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8024           0 :                 range++;
    8025             :         }
    8026             : 
    8027             :         /* Final range describes the remaining blocks */
    8028           1 :         range->attributes.raw = 0;
    8029           1 :         range->length = remaining;
    8030           1 :         range->starting_lba = offset;
    8031             : 
    8032           1 :         rc = spdk_nvme_ns_cmd_dataset_management(bio->io_path->nvme_ns->ns,
    8033           1 :                         bio->io_path->qpair->qpair,
    8034             :                         SPDK_NVME_DSM_ATTR_DEALLOCATE,
    8035             :                         dsm_ranges, num_ranges,
    8036             :                         bdev_nvme_queued_done, bio);
    8037             : 
    8038           1 :         return rc;
    8039             : }
    8040             : 
    8041             : static int
    8042           0 : bdev_nvme_write_zeroes(struct nvme_bdev_io *bio, uint64_t offset_blocks, uint64_t num_blocks)
    8043             : {
    8044           0 :         if (num_blocks > UINT16_MAX + 1) {
    8045           0 :                 SPDK_ERRLOG("NVMe write zeroes is limited to 16-bit block count\n");
    8046           0 :                 return -EINVAL;
    8047             :         }
    8048             : 
    8049           0 :         return spdk_nvme_ns_cmd_write_zeroes(bio->io_path->nvme_ns->ns,
    8050           0 :                                              bio->io_path->qpair->qpair,
    8051             :                                              offset_blocks, num_blocks,
    8052             :                                              bdev_nvme_queued_done, bio,
    8053             :                                              0);
    8054             : }
    8055             : 
    8056             : static int
    8057           0 : bdev_nvme_get_zone_info(struct nvme_bdev_io *bio, uint64_t zone_id, uint32_t num_zones,
    8058             :                         struct spdk_bdev_zone_info *info)
    8059             : {
    8060           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8061           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8062           0 :         uint32_t zone_report_bufsize = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8063           0 :         uint64_t zone_size = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    8064           0 :         uint64_t total_zones = spdk_nvme_zns_ns_get_num_zones(ns);
    8065             : 
    8066           0 :         if (zone_id % zone_size != 0) {
    8067           0 :                 return -EINVAL;
    8068             :         }
    8069             : 
    8070           0 :         if (num_zones > total_zones || !num_zones) {
    8071           0 :                 return -EINVAL;
    8072             :         }
    8073             : 
    8074           0 :         assert(!bio->zone_report_buf);
    8075           0 :         bio->zone_report_buf = calloc(1, zone_report_bufsize);
    8076           0 :         if (!bio->zone_report_buf) {
    8077           0 :                 return -ENOMEM;
    8078             :         }
    8079             : 
    8080           0 :         bio->handled_zones = 0;
    8081             : 
    8082           0 :         return spdk_nvme_zns_report_zones(ns, qpair, bio->zone_report_buf, zone_report_bufsize,
    8083             :                                           zone_id, SPDK_NVME_ZRA_LIST_ALL, true,
    8084             :                                           bdev_nvme_get_zone_info_done, bio);
    8085             : }
    8086             : 
    8087             : static int
    8088           0 : bdev_nvme_zone_management(struct nvme_bdev_io *bio, uint64_t zone_id,
    8089             :                           enum spdk_bdev_zone_action action)
    8090             : {
    8091           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8092           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8093             : 
    8094           0 :         switch (action) {
    8095           0 :         case SPDK_BDEV_ZONE_CLOSE:
    8096           0 :                 return spdk_nvme_zns_close_zone(ns, qpair, zone_id, false,
    8097             :                                                 bdev_nvme_zone_management_done, bio);
    8098           0 :         case SPDK_BDEV_ZONE_FINISH:
    8099           0 :                 return spdk_nvme_zns_finish_zone(ns, qpair, zone_id, false,
    8100             :                                                  bdev_nvme_zone_management_done, bio);
    8101           0 :         case SPDK_BDEV_ZONE_OPEN:
    8102           0 :                 return spdk_nvme_zns_open_zone(ns, qpair, zone_id, false,
    8103             :                                                bdev_nvme_zone_management_done, bio);
    8104           0 :         case SPDK_BDEV_ZONE_RESET:
    8105           0 :                 return spdk_nvme_zns_reset_zone(ns, qpair, zone_id, false,
    8106             :                                                 bdev_nvme_zone_management_done, bio);
    8107           0 :         case SPDK_BDEV_ZONE_OFFLINE:
    8108           0 :                 return spdk_nvme_zns_offline_zone(ns, qpair, zone_id, false,
    8109             :                                                   bdev_nvme_zone_management_done, bio);
    8110           0 :         default:
    8111           0 :                 return -EINVAL;
    8112             :         }
    8113             : }
    8114             : 
    8115             : static void
    8116           5 : bdev_nvme_admin_passthru(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio,
    8117             :                          struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes)
    8118             : {
    8119             :         struct nvme_io_path *io_path;
    8120             :         struct nvme_ctrlr *nvme_ctrlr;
    8121             :         uint32_t max_xfer_size;
    8122           5 :         int rc = -ENXIO;
    8123             : 
    8124             :         /* Choose the first ctrlr which is not failed. */
    8125           8 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    8126           7 :                 nvme_ctrlr = io_path->qpair->ctrlr;
    8127             : 
    8128             :                 /* We should skip any unavailable nvme_ctrlr rather than checking
    8129             :                  * if the return value of spdk_nvme_ctrlr_cmd_admin_raw() is -ENXIO.
    8130             :                  */
    8131           7 :                 if (!nvme_ctrlr_is_available(nvme_ctrlr)) {
    8132           3 :                         continue;
    8133             :                 }
    8134             : 
    8135           4 :                 max_xfer_size = spdk_nvme_ctrlr_get_max_xfer_size(nvme_ctrlr->ctrlr);
    8136             : 
    8137           4 :                 if (nbytes > max_xfer_size) {
    8138           0 :                         SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8139           0 :                         rc = -EINVAL;
    8140           0 :                         goto err;
    8141             :                 }
    8142             : 
    8143           4 :                 rc = spdk_nvme_ctrlr_cmd_admin_raw(nvme_ctrlr->ctrlr, cmd, buf, (uint32_t)nbytes,
    8144             :                                                    bdev_nvme_admin_passthru_done, bio);
    8145           4 :                 if (rc == 0) {
    8146           4 :                         return;
    8147             :                 }
    8148             :         }
    8149             : 
    8150           1 : err:
    8151           1 :         bdev_nvme_admin_complete(bio, rc);
    8152             : }
    8153             : 
    8154             : static int
    8155           0 : bdev_nvme_io_passthru(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
    8156             :                       void *buf, size_t nbytes)
    8157             : {
    8158           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8159           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8160           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8161           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8162             : 
    8163           0 :         if (nbytes > max_xfer_size) {
    8164           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8165           0 :                 return -EINVAL;
    8166             :         }
    8167             : 
    8168             :         /*
    8169             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands require a nsid,
    8170             :          * so fill it out automatically.
    8171             :          */
    8172           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8173             : 
    8174           0 :         return spdk_nvme_ctrlr_cmd_io_raw(ctrlr, qpair, cmd, buf,
    8175             :                                           (uint32_t)nbytes, bdev_nvme_queued_done, bio);
    8176             : }
    8177             : 
    8178             : static int
    8179           0 : bdev_nvme_io_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
    8180             :                          void *buf, size_t nbytes, void *md_buf, size_t md_len)
    8181             : {
    8182           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8183           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8184           0 :         size_t nr_sectors = nbytes / spdk_nvme_ns_get_extended_sector_size(ns);
    8185           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8186           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8187             : 
    8188           0 :         if (nbytes > max_xfer_size) {
    8189           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8190           0 :                 return -EINVAL;
    8191             :         }
    8192             : 
    8193           0 :         if (md_len != nr_sectors * spdk_nvme_ns_get_md_size(ns)) {
    8194           0 :                 SPDK_ERRLOG("invalid meta data buffer size\n");
    8195           0 :                 return -EINVAL;
    8196             :         }
    8197             : 
    8198             :         /*
    8199             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands require a nsid,
    8200             :          * so fill it out automatically.
    8201             :          */
    8202           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8203             : 
    8204           0 :         return spdk_nvme_ctrlr_cmd_io_raw_with_md(ctrlr, qpair, cmd, buf,
    8205             :                         (uint32_t)nbytes, md_buf, bdev_nvme_queued_done, bio);
    8206             : }
    8207             : 
    8208             : static int
    8209           0 : bdev_nvme_iov_passthru_md(struct nvme_bdev_io *bio,
    8210             :                           struct spdk_nvme_cmd *cmd, struct iovec *iov, int iovcnt,
    8211             :                           size_t nbytes, void *md_buf, size_t md_len)
    8212             : {
    8213           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8214           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8215           0 :         size_t nr_sectors = nbytes / spdk_nvme_ns_get_extended_sector_size(ns);
    8216           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8217           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8218             : 
    8219           0 :         bio->iovs = iov;
    8220           0 :         bio->iovcnt = iovcnt;
    8221           0 :         bio->iovpos = 0;
    8222           0 :         bio->iov_offset = 0;
    8223             : 
    8224           0 :         if (nbytes > max_xfer_size) {
    8225           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8226           0 :                 return -EINVAL;
    8227             :         }
    8228             : 
    8229           0 :         if (md_len != nr_sectors * spdk_nvme_ns_get_md_size(ns)) {
    8230           0 :                 SPDK_ERRLOG("invalid meta data buffer size\n");
    8231           0 :                 return -EINVAL;
    8232             :         }
    8233             : 
    8234             :         /*
    8235             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands
    8236             :          * require a nsid, so fill it out automatically.
    8237             :          */
    8238           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8239             : 
    8240           0 :         return spdk_nvme_ctrlr_cmd_iov_raw_with_md(
    8241             :                        ctrlr, qpair, cmd, (uint32_t)nbytes, md_buf, bdev_nvme_queued_done, bio,
    8242             :                        bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge);
    8243             : }
    8244             : 
    8245             : static void
    8246           6 : bdev_nvme_abort(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio,
    8247             :                 struct nvme_bdev_io *bio_to_abort)
    8248             : {
    8249             :         struct nvme_io_path *io_path;
    8250           6 :         int rc = 0;
    8251             : 
    8252           6 :         rc = bdev_nvme_abort_retry_io(nbdev_ch, bio_to_abort);
    8253           6 :         if (rc == 0) {
    8254           1 :                 bdev_nvme_admin_complete(bio, 0);
    8255           1 :                 return;
    8256             :         }
    8257             : 
    8258           5 :         io_path = bio_to_abort->io_path;
    8259           5 :         if (io_path != NULL) {
    8260           3 :                 rc = spdk_nvme_ctrlr_cmd_abort_ext(io_path->qpair->ctrlr->ctrlr,
    8261           3 :                                                    io_path->qpair->qpair,
    8262             :                                                    bio_to_abort,
    8263             :                                                    bdev_nvme_abort_done, bio);
    8264             :         } else {
    8265           3 :                 STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    8266           2 :                         rc = spdk_nvme_ctrlr_cmd_abort_ext(io_path->qpair->ctrlr->ctrlr,
    8267             :                                                            NULL,
    8268             :                                                            bio_to_abort,
    8269             :                                                            bdev_nvme_abort_done, bio);
    8270             : 
    8271           2 :                         if (rc != -ENOENT) {
    8272           1 :                                 break;
    8273             :                         }
    8274             :                 }
    8275             :         }
    8276             : 
    8277           5 :         if (rc != 0) {
    8278             :                 /* If no command was found or there was any error, complete the abort
    8279             :                  * request with failure.
    8280             :                  */
    8281           2 :                 bdev_nvme_admin_complete(bio, rc);
    8282             :         }
    8283             : }
    8284             : 
    8285             : static int
    8286           0 : bdev_nvme_copy(struct nvme_bdev_io *bio, uint64_t dst_offset_blocks, uint64_t src_offset_blocks,
    8287             :                uint64_t num_blocks)
    8288             : {
    8289           0 :         struct spdk_nvme_scc_source_range range = {
    8290             :                 .slba = src_offset_blocks,
    8291           0 :                 .nlb = num_blocks - 1
    8292             :         };
    8293             : 
    8294           0 :         return spdk_nvme_ns_cmd_copy(bio->io_path->nvme_ns->ns,
    8295           0 :                                      bio->io_path->qpair->qpair,
    8296             :                                      &range, 1, dst_offset_blocks,
    8297             :                                      bdev_nvme_queued_done, bio);
    8298             : }
    8299             : 
    8300             : static void
    8301           0 : bdev_nvme_opts_config_json(struct spdk_json_write_ctx *w)
    8302             : {
    8303             :         const char *action;
    8304             :         uint32_t i;
    8305             : 
    8306           0 :         if (g_opts.action_on_timeout == SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET) {
    8307           0 :                 action = "reset";
    8308           0 :         } else if (g_opts.action_on_timeout == SPDK_BDEV_NVME_TIMEOUT_ACTION_ABORT) {
    8309           0 :                 action = "abort";
    8310             :         } else {
    8311           0 :                 action = "none";
    8312             :         }
    8313             : 
    8314           0 :         spdk_json_write_object_begin(w);
    8315             : 
    8316           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_set_options");
    8317             : 
    8318           0 :         spdk_json_write_named_object_begin(w, "params");
    8319           0 :         spdk_json_write_named_string(w, "action_on_timeout", action);
    8320           0 :         spdk_json_write_named_uint64(w, "timeout_us", g_opts.timeout_us);
    8321           0 :         spdk_json_write_named_uint64(w, "timeout_admin_us", g_opts.timeout_admin_us);
    8322           0 :         spdk_json_write_named_uint32(w, "keep_alive_timeout_ms", g_opts.keep_alive_timeout_ms);
    8323           0 :         spdk_json_write_named_uint32(w, "arbitration_burst", g_opts.arbitration_burst);
    8324           0 :         spdk_json_write_named_uint32(w, "low_priority_weight", g_opts.low_priority_weight);
    8325           0 :         spdk_json_write_named_uint32(w, "medium_priority_weight", g_opts.medium_priority_weight);
    8326           0 :         spdk_json_write_named_uint32(w, "high_priority_weight", g_opts.high_priority_weight);
    8327           0 :         spdk_json_write_named_uint64(w, "nvme_adminq_poll_period_us", g_opts.nvme_adminq_poll_period_us);
    8328           0 :         spdk_json_write_named_uint64(w, "nvme_ioq_poll_period_us", g_opts.nvme_ioq_poll_period_us);
    8329           0 :         spdk_json_write_named_uint32(w, "io_queue_requests", g_opts.io_queue_requests);
    8330           0 :         spdk_json_write_named_bool(w, "delay_cmd_submit", g_opts.delay_cmd_submit);
    8331           0 :         spdk_json_write_named_uint32(w, "transport_retry_count", g_opts.transport_retry_count);
    8332           0 :         spdk_json_write_named_int32(w, "bdev_retry_count", g_opts.bdev_retry_count);
    8333           0 :         spdk_json_write_named_uint8(w, "transport_ack_timeout", g_opts.transport_ack_timeout);
    8334           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", g_opts.ctrlr_loss_timeout_sec);
    8335           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", g_opts.reconnect_delay_sec);
    8336           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec", g_opts.fast_io_fail_timeout_sec);
    8337           0 :         spdk_json_write_named_bool(w, "disable_auto_failback", g_opts.disable_auto_failback);
    8338           0 :         spdk_json_write_named_bool(w, "generate_uuids", g_opts.generate_uuids);
    8339           0 :         spdk_json_write_named_uint8(w, "transport_tos", g_opts.transport_tos);
    8340           0 :         spdk_json_write_named_bool(w, "nvme_error_stat", g_opts.nvme_error_stat);
    8341           0 :         spdk_json_write_named_uint32(w, "rdma_srq_size", g_opts.rdma_srq_size);
    8342           0 :         spdk_json_write_named_bool(w, "io_path_stat", g_opts.io_path_stat);
    8343           0 :         spdk_json_write_named_bool(w, "allow_accel_sequence", g_opts.allow_accel_sequence);
    8344           0 :         spdk_json_write_named_uint32(w, "rdma_max_cq_size", g_opts.rdma_max_cq_size);
    8345           0 :         spdk_json_write_named_uint16(w, "rdma_cm_event_timeout_ms", g_opts.rdma_cm_event_timeout_ms);
    8346           0 :         spdk_json_write_named_array_begin(w, "dhchap_digests");
    8347           0 :         for (i = 0; i < 32; ++i) {
    8348           0 :                 if (g_opts.dhchap_digests & SPDK_BIT(i)) {
    8349           0 :                         spdk_json_write_string(w, spdk_nvme_dhchap_get_digest_name(i));
    8350             :                 }
    8351             :         }
    8352           0 :         spdk_json_write_array_end(w);
    8353           0 :         spdk_json_write_named_array_begin(w, "dhchap_dhgroups");
    8354           0 :         for (i = 0; i < 32; ++i) {
    8355           0 :                 if (g_opts.dhchap_dhgroups & SPDK_BIT(i)) {
    8356           0 :                         spdk_json_write_string(w, spdk_nvme_dhchap_get_dhgroup_name(i));
    8357             :                 }
    8358             :         }
    8359             : 
    8360           0 :         spdk_json_write_array_end(w);
    8361           0 :         spdk_json_write_object_end(w);
    8362             : 
    8363           0 :         spdk_json_write_object_end(w);
    8364           0 : }
    8365             : 
    8366             : static void
    8367           0 : bdev_nvme_discovery_config_json(struct spdk_json_write_ctx *w, struct discovery_ctx *ctx)
    8368             : {
    8369           0 :         struct spdk_nvme_transport_id trid;
    8370             : 
    8371           0 :         spdk_json_write_object_begin(w);
    8372             : 
    8373           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_start_discovery");
    8374             : 
    8375           0 :         spdk_json_write_named_object_begin(w, "params");
    8376           0 :         spdk_json_write_named_string(w, "name", ctx->name);
    8377           0 :         spdk_json_write_named_string(w, "hostnqn", ctx->hostnqn);
    8378             : 
    8379           0 :         trid = ctx->trid;
    8380           0 :         memset(trid.subnqn, 0, sizeof(trid.subnqn));
    8381           0 :         nvme_bdev_dump_trid_json(&trid, w);
    8382             : 
    8383           0 :         spdk_json_write_named_bool(w, "wait_for_attach", ctx->wait_for_attach);
    8384           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", ctx->bdev_opts.ctrlr_loss_timeout_sec);
    8385           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", ctx->bdev_opts.reconnect_delay_sec);
    8386           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec",
    8387             :                                      ctx->bdev_opts.fast_io_fail_timeout_sec);
    8388           0 :         spdk_json_write_object_end(w);
    8389             : 
    8390           0 :         spdk_json_write_object_end(w);
    8391           0 : }
    8392             : 
    8393             : #ifdef SPDK_CONFIG_NVME_CUSE
    8394             : static void
    8395           0 : nvme_ctrlr_cuse_config_json(struct spdk_json_write_ctx *w,
    8396             :                             struct nvme_ctrlr *nvme_ctrlr)
    8397           0 : {
    8398           0 :         size_t cuse_name_size = 128;
    8399           0 :         char cuse_name[cuse_name_size];
    8400             : 
    8401           0 :         if (spdk_nvme_cuse_get_ctrlr_name(nvme_ctrlr->ctrlr,
    8402             :                                           cuse_name, &cuse_name_size) != 0) {
    8403           0 :                 return;
    8404             :         }
    8405             : 
    8406           0 :         spdk_json_write_object_begin(w);
    8407             : 
    8408           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_cuse_register");
    8409             : 
    8410           0 :         spdk_json_write_named_object_begin(w, "params");
    8411           0 :         spdk_json_write_named_string(w, "name", nvme_ctrlr->nbdev_ctrlr->name);
    8412           0 :         spdk_json_write_object_end(w);
    8413             : 
    8414           0 :         spdk_json_write_object_end(w);
    8415             : }
    8416             : #endif
    8417             : 
    8418             : static void
    8419           0 : nvme_ctrlr_config_json(struct spdk_json_write_ctx *w,
    8420             :                        struct nvme_ctrlr *nvme_ctrlr)
    8421             : {
    8422             :         struct spdk_nvme_transport_id   *trid;
    8423             :         const struct spdk_nvme_ctrlr_opts *opts;
    8424             : 
    8425           0 :         if (nvme_ctrlr->opts.from_discovery_service) {
    8426             :                 /* Do not emit an RPC for this - it will be implicitly
    8427             :                  * covered by a separate bdev_nvme_start_discovery or
    8428             :                  * bdev_nvme_start_mdns_discovery RPC.
    8429             :                  */
    8430           0 :                 return;
    8431             :         }
    8432             : 
    8433           0 :         trid = &nvme_ctrlr->active_path_id->trid;
    8434             : 
    8435           0 :         spdk_json_write_object_begin(w);
    8436             : 
    8437           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_attach_controller");
    8438             : 
    8439           0 :         spdk_json_write_named_object_begin(w, "params");
    8440           0 :         spdk_json_write_named_string(w, "name", nvme_ctrlr->nbdev_ctrlr->name);
    8441           0 :         nvme_bdev_dump_trid_json(trid, w);
    8442           0 :         spdk_json_write_named_bool(w, "prchk_reftag",
    8443           0 :                                    (nvme_ctrlr->opts.prchk_flags & SPDK_NVME_IO_FLAGS_PRCHK_REFTAG) != 0);
    8444           0 :         spdk_json_write_named_bool(w, "prchk_guard",
    8445           0 :                                    (nvme_ctrlr->opts.prchk_flags & SPDK_NVME_IO_FLAGS_PRCHK_GUARD) != 0);
    8446           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", nvme_ctrlr->opts.ctrlr_loss_timeout_sec);
    8447           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", nvme_ctrlr->opts.reconnect_delay_sec);
    8448           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec",
    8449             :                                      nvme_ctrlr->opts.fast_io_fail_timeout_sec);
    8450           0 :         if (nvme_ctrlr->psk != NULL) {
    8451           0 :                 spdk_json_write_named_string(w, "psk", spdk_key_get_name(nvme_ctrlr->psk));
    8452           0 :         } else if (nvme_ctrlr->opts.psk[0] != '\0') {
    8453           0 :                 spdk_json_write_named_string(w, "psk", nvme_ctrlr->opts.psk);
    8454             :         }
    8455             : 
    8456           0 :         opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
    8457           0 :         spdk_json_write_named_string(w, "hostnqn", opts->hostnqn);
    8458           0 :         spdk_json_write_named_bool(w, "hdgst", opts->header_digest);
    8459           0 :         spdk_json_write_named_bool(w, "ddgst", opts->data_digest);
    8460           0 :         if (opts->src_addr[0] != '\0') {
    8461           0 :                 spdk_json_write_named_string(w, "hostaddr", opts->src_addr);
    8462             :         }
    8463           0 :         if (opts->src_svcid[0] != '\0') {
    8464           0 :                 spdk_json_write_named_string(w, "hostsvcid", opts->src_svcid);
    8465             :         }
    8466             : 
    8467           0 :         spdk_json_write_object_end(w);
    8468             : 
    8469           0 :         spdk_json_write_object_end(w);
    8470             : }
    8471             : 
    8472             : static void
    8473           0 : bdev_nvme_hotplug_config_json(struct spdk_json_write_ctx *w)
    8474             : {
    8475           0 :         spdk_json_write_object_begin(w);
    8476           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_set_hotplug");
    8477             : 
    8478           0 :         spdk_json_write_named_object_begin(w, "params");
    8479           0 :         spdk_json_write_named_uint64(w, "period_us", g_nvme_hotplug_poll_period_us);
    8480           0 :         spdk_json_write_named_bool(w, "enable", g_nvme_hotplug_enabled);
    8481           0 :         spdk_json_write_object_end(w);
    8482             : 
    8483           0 :         spdk_json_write_object_end(w);
    8484           0 : }
    8485             : 
    8486             : static int
    8487           0 : bdev_nvme_config_json(struct spdk_json_write_ctx *w)
    8488             : {
    8489             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
    8490             :         struct nvme_ctrlr       *nvme_ctrlr;
    8491             :         struct discovery_ctx    *ctx;
    8492             : 
    8493           0 :         bdev_nvme_opts_config_json(w);
    8494             : 
    8495           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    8496             : 
    8497           0 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
    8498           0 :                 TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    8499           0 :                         nvme_ctrlr_config_json(w, nvme_ctrlr);
    8500             : 
    8501             : #ifdef SPDK_CONFIG_NVME_CUSE
    8502           0 :                         nvme_ctrlr_cuse_config_json(w, nvme_ctrlr);
    8503             : #endif
    8504             :                 }
    8505             :         }
    8506             : 
    8507           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    8508           0 :                 if (!ctx->from_mdns_discovery_service) {
    8509           0 :                         bdev_nvme_discovery_config_json(w, ctx);
    8510             :                 }
    8511             :         }
    8512             : 
    8513           0 :         bdev_nvme_mdns_discovery_config_json(w);
    8514             : 
    8515             :         /* Dump as last parameter to give all NVMe bdevs chance to be constructed
    8516             :          * before enabling hotplug poller.
    8517             :          */
    8518           0 :         bdev_nvme_hotplug_config_json(w);
    8519             : 
    8520           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    8521           0 :         return 0;
    8522             : }
    8523             : 
    8524             : struct spdk_nvme_ctrlr *
    8525           1 : bdev_nvme_get_ctrlr(struct spdk_bdev *bdev)
    8526             : {
    8527             :         struct nvme_bdev *nbdev;
    8528             :         struct nvme_ns *nvme_ns;
    8529             : 
    8530           1 :         if (!bdev || bdev->module != &nvme_if) {
    8531           0 :                 return NULL;
    8532             :         }
    8533             : 
    8534           1 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    8535           1 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    8536           1 :         assert(nvme_ns != NULL);
    8537             : 
    8538           1 :         return nvme_ns->ctrlr->ctrlr;
    8539             : }
    8540             : 
    8541             : void
    8542           0 : nvme_io_path_info_json(struct spdk_json_write_ctx *w, struct nvme_io_path *io_path)
    8543             : {
    8544           0 :         struct nvme_ns *nvme_ns = io_path->nvme_ns;
    8545           0 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    8546             :         const struct spdk_nvme_ctrlr_data *cdata;
    8547             :         const struct spdk_nvme_transport_id *trid;
    8548             :         const struct nvme_bdev_channel *nbdev_ch;
    8549             :         const char *adrfam_str;
    8550             :         bool current;
    8551             : 
    8552           0 :         spdk_json_write_object_begin(w);
    8553             : 
    8554           0 :         spdk_json_write_named_string(w, "bdev_name", nvme_ns->bdev->disk.name);
    8555             : 
    8556           0 :         cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    8557           0 :         trid = spdk_nvme_ctrlr_get_transport_id(nvme_ctrlr->ctrlr);
    8558             : 
    8559           0 :         spdk_json_write_named_uint32(w, "cntlid", cdata->cntlid);
    8560           0 :         nbdev_ch = io_path->nbdev_ch;
    8561           0 :         if (nbdev_ch == NULL) {
    8562           0 :                 current = false;
    8563           0 :         } else if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    8564           0 :                 struct nvme_io_path *optimized_io_path = NULL;
    8565             : 
    8566           0 :                 STAILQ_FOREACH(optimized_io_path, &nbdev_ch->io_path_list, stailq) {
    8567           0 :                         if (optimized_io_path->nvme_ns->ana_state == SPDK_NVME_ANA_OPTIMIZED_STATE) {
    8568           0 :                                 break;
    8569             :                         }
    8570             :                 }
    8571             : 
    8572           0 :                 current = nvme_io_path_is_available(io_path);
    8573           0 :                 if (io_path->nvme_ns->ana_state == SPDK_NVME_ANA_NON_OPTIMIZED_STATE) {
    8574             :                         /* A non-optimized path is only current if there are no optimized paths. */
    8575           0 :                         current = current && (optimized_io_path == NULL);
    8576             :                 }
    8577             :         } else {
    8578           0 :                 if (nbdev_ch->current_io_path) {
    8579           0 :                         current = (io_path == nbdev_ch->current_io_path);
    8580             :                 } else {
    8581             :                         struct nvme_io_path *first_path;
    8582             : 
    8583             :                         /* We arrived here as there are no optimized paths for active-passive
    8584             :                          * mode. Check if this io_path is the first one available on the list.
    8585             :                          */
    8586           0 :                         current = false;
    8587           0 :                         STAILQ_FOREACH(first_path, &nbdev_ch->io_path_list, stailq) {
    8588           0 :                                 if (nvme_io_path_is_available(first_path)) {
    8589           0 :                                         current = (io_path == first_path);
    8590           0 :                                         break;
    8591             :                                 }
    8592             :                         }
    8593             :                 }
    8594             :         }
    8595           0 :         spdk_json_write_named_bool(w, "current", current);
    8596           0 :         spdk_json_write_named_bool(w, "connected", nvme_qpair_is_connected(io_path->qpair));
    8597           0 :         spdk_json_write_named_bool(w, "accessible", nvme_ns_is_accessible(nvme_ns));
    8598             : 
    8599           0 :         spdk_json_write_named_object_begin(w, "transport");
    8600           0 :         spdk_json_write_named_string(w, "trtype", trid->trstring);
    8601           0 :         spdk_json_write_named_string(w, "traddr", trid->traddr);
    8602           0 :         if (trid->trsvcid[0] != '\0') {
    8603           0 :                 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid);
    8604             :         }
    8605           0 :         adrfam_str = spdk_nvme_transport_id_adrfam_str(trid->adrfam);
    8606           0 :         if (adrfam_str) {
    8607           0 :                 spdk_json_write_named_string(w, "adrfam", adrfam_str);
    8608             :         }
    8609           0 :         spdk_json_write_object_end(w);
    8610             : 
    8611           0 :         spdk_json_write_object_end(w);
    8612           0 : }
    8613             : 
    8614             : void
    8615           0 : bdev_nvme_get_discovery_info(struct spdk_json_write_ctx *w)
    8616             : {
    8617             :         struct discovery_ctx *ctx;
    8618             :         struct discovery_entry_ctx *entry_ctx;
    8619             : 
    8620           0 :         spdk_json_write_array_begin(w);
    8621           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    8622           0 :                 spdk_json_write_object_begin(w);
    8623           0 :                 spdk_json_write_named_string(w, "name", ctx->name);
    8624             : 
    8625           0 :                 spdk_json_write_named_object_begin(w, "trid");
    8626           0 :                 nvme_bdev_dump_trid_json(&ctx->trid, w);
    8627           0 :                 spdk_json_write_object_end(w);
    8628             : 
    8629           0 :                 spdk_json_write_named_array_begin(w, "referrals");
    8630           0 :                 TAILQ_FOREACH(entry_ctx, &ctx->discovery_entry_ctxs, tailq) {
    8631           0 :                         spdk_json_write_object_begin(w);
    8632           0 :                         spdk_json_write_named_object_begin(w, "trid");
    8633           0 :                         nvme_bdev_dump_trid_json(&entry_ctx->trid, w);
    8634           0 :                         spdk_json_write_object_end(w);
    8635           0 :                         spdk_json_write_object_end(w);
    8636             :                 }
    8637           0 :                 spdk_json_write_array_end(w);
    8638             : 
    8639           0 :                 spdk_json_write_object_end(w);
    8640             :         }
    8641           0 :         spdk_json_write_array_end(w);
    8642           0 : }
    8643             : 
    8644           1 : SPDK_LOG_REGISTER_COMPONENT(bdev_nvme)
    8645             : 
    8646           1 : SPDK_TRACE_REGISTER_FN(bdev_nvme_trace, "bdev_nvme", TRACE_GROUP_BDEV_NVME)
    8647             : {
    8648           0 :         struct spdk_trace_tpoint_opts opts[] = {
    8649             :                 {
    8650             :                         "BDEV_NVME_IO_START", TRACE_BDEV_NVME_IO_START,
    8651             :                         OWNER_TYPE_NONE, OBJECT_BDEV_NVME_IO, 1,
    8652             :                         {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
    8653             :                 },
    8654             :                 {
    8655             :                         "BDEV_NVME_IO_DONE", TRACE_BDEV_NVME_IO_DONE,
    8656             :                         OWNER_TYPE_NONE, OBJECT_BDEV_NVME_IO, 0,
    8657             :                         {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
    8658             :                 }
    8659             :         };
    8660             : 
    8661             : 
    8662           0 :         spdk_trace_register_object(OBJECT_BDEV_NVME_IO, 'N');
    8663           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
    8664           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_PCIE_SUBMIT, OBJECT_BDEV_NVME_IO, 0);
    8665           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_TCP_SUBMIT, OBJECT_BDEV_NVME_IO, 0);
    8666           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_PCIE_COMPLETE, OBJECT_BDEV_NVME_IO, 0);
    8667           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_TCP_COMPLETE, OBJECT_BDEV_NVME_IO, 0);
    8668           0 : }

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