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: 2663 5075 52.5 %
Date: 2024-11-20 15:12:59 Functions: 225 326 69.0 %

          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 CTRLR_STRING(nvme_ctrlr) \
      36             :         (spdk_nvme_trtype_is_fabrics(nvme_ctrlr->active_path_id->trid.trtype) ? \
      37             :         nvme_ctrlr->active_path_id->trid.subnqn : nvme_ctrlr->active_path_id->trid.traddr)
      38             : 
      39             : #define CTRLR_ID(nvme_ctrlr)    (spdk_nvme_ctrlr_get_id(nvme_ctrlr->ctrlr))
      40             : 
      41             : #define NVME_CTRLR_ERRLOG(ctrlr, format, ...) \
      42             :         SPDK_ERRLOG("[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      43             : 
      44             : #define NVME_CTRLR_WARNLOG(ctrlr, format, ...) \
      45             :         SPDK_WARNLOG("[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      46             : 
      47             : #define NVME_CTRLR_NOTICELOG(ctrlr, format, ...) \
      48             :         SPDK_NOTICELOG("[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      49             : 
      50             : #define NVME_CTRLR_INFOLOG(ctrlr, format, ...) \
      51             :         SPDK_INFOLOG(bdev_nvme, "[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      52             : 
      53             : #ifdef DEBUG
      54             : #define NVME_CTRLR_DEBUGLOG(ctrlr, format, ...) \
      55             :         SPDK_DEBUGLOG(bdev_nvme, "[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      56             : #else
      57             : #define NVME_CTRLR_DEBUGLOG(ctrlr, ...) do { } while (0)
      58             : #endif
      59             : 
      60             : #define BDEV_STRING(nbdev) (nbdev->disk.name)
      61             : 
      62             : #define NVME_BDEV_ERRLOG(nbdev, format, ...) \
      63             :         SPDK_ERRLOG("[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      64             : 
      65             : #define NVME_BDEV_WARNLOG(nbdev, format, ...) \
      66             :         SPDK_WARNLOG("[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      67             : 
      68             : #define NVME_BDEV_NOTICELOG(nbdev, format, ...) \
      69             :         SPDK_NOTICELOG("[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      70             : 
      71             : #define NVME_BDEV_INFOLOG(nbdev, format, ...) \
      72             :         SPDK_INFOLOG(bdev_nvme, "[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      73             : 
      74             : #define SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT true
      75             : #define SPDK_BDEV_NVME_DEFAULT_KEEP_ALIVE_TIMEOUT_IN_MS (10000)
      76             : 
      77             : #define NSID_STR_LEN 10
      78             : 
      79             : #define SPDK_CONTROLLER_NAME_MAX 512
      80             : 
      81             : static int bdev_nvme_config_json(struct spdk_json_write_ctx *w);
      82             : 
      83             : struct nvme_bdev_io {
      84             :         /** array of iovecs to transfer. */
      85             :         struct iovec *iovs;
      86             : 
      87             :         /** Number of iovecs in iovs array. */
      88             :         int iovcnt;
      89             : 
      90             :         /** Current iovec position. */
      91             :         int iovpos;
      92             : 
      93             :         /** Offset in current iovec. */
      94             :         uint32_t iov_offset;
      95             : 
      96             :         /** Offset in current iovec. */
      97             :         uint32_t fused_iov_offset;
      98             : 
      99             :         /** array of iovecs to transfer. */
     100             :         struct iovec *fused_iovs;
     101             : 
     102             :         /** Number of iovecs in iovs array. */
     103             :         int fused_iovcnt;
     104             : 
     105             :         /** Current iovec position. */
     106             :         int fused_iovpos;
     107             : 
     108             :         /** I/O path the current I/O or admin passthrough is submitted on, or the I/O path
     109             :          *  being reset in a reset I/O.
     110             :          */
     111             :         struct nvme_io_path *io_path;
     112             : 
     113             :         /** Saved status for admin passthru completion event, PI error verification, or intermediate compare-and-write status */
     114             :         struct spdk_nvme_cpl cpl;
     115             : 
     116             :         /** Extended IO opts passed by the user to bdev layer and mapped to NVME format */
     117             :         struct spdk_nvme_ns_cmd_ext_io_opts ext_opts;
     118             : 
     119             :         /** Keeps track if first of fused commands was submitted */
     120             :         bool first_fused_submitted;
     121             : 
     122             :         /** Keeps track if first of fused commands was completed */
     123             :         bool first_fused_completed;
     124             : 
     125             :         /* How many times the current I/O was retried. */
     126             :         int32_t retry_count;
     127             : 
     128             :         /** Expiration value in ticks to retry the current I/O. */
     129             :         uint64_t retry_ticks;
     130             : 
     131             :         /** Temporary pointer to zone report buffer */
     132             :         struct spdk_nvme_zns_zone_report *zone_report_buf;
     133             : 
     134             :         /** Keep track of how many zones that have been copied to the spdk_bdev_zone_info struct */
     135             :         uint64_t handled_zones;
     136             : 
     137             :         /* Current tsc at submit time. */
     138             :         uint64_t submit_tsc;
     139             : 
     140             :         /* Used to put nvme_bdev_io into the list */
     141             :         TAILQ_ENTRY(nvme_bdev_io) retry_link;
     142             : };
     143             : 
     144             : struct nvme_probe_skip_entry {
     145             :         struct spdk_nvme_transport_id           trid;
     146             :         TAILQ_ENTRY(nvme_probe_skip_entry)      tailq;
     147             : };
     148             : /* All the controllers deleted by users via RPC are skipped by hotplug monitor */
     149             : static TAILQ_HEAD(, nvme_probe_skip_entry) g_skipped_nvme_ctrlrs = TAILQ_HEAD_INITIALIZER(
     150             :                         g_skipped_nvme_ctrlrs);
     151             : 
     152             : #define BDEV_NVME_DEFAULT_DIGESTS (SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA256) | \
     153             :                                    SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA384) | \
     154             :                                    SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA512))
     155             : 
     156             : #define BDEV_NVME_DEFAULT_DHGROUPS (SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_NULL) | \
     157             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_2048) | \
     158             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_3072) | \
     159             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_4096) | \
     160             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_6144) | \
     161             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_8192))
     162             : 
     163             : static struct spdk_bdev_nvme_opts g_opts = {
     164             :         .action_on_timeout = SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE,
     165             :         .keep_alive_timeout_ms = SPDK_BDEV_NVME_DEFAULT_KEEP_ALIVE_TIMEOUT_IN_MS,
     166             :         .timeout_us = 0,
     167             :         .timeout_admin_us = 0,
     168             :         .transport_retry_count = 4,
     169             :         .arbitration_burst = 0,
     170             :         .low_priority_weight = 0,
     171             :         .medium_priority_weight = 0,
     172             :         .high_priority_weight = 0,
     173             :         .io_queue_requests = 0,
     174             :         .nvme_adminq_poll_period_us = 10000ULL,
     175             :         .nvme_ioq_poll_period_us = 0,
     176             :         .delay_cmd_submit = SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT,
     177             :         .bdev_retry_count = 3,
     178             :         .ctrlr_loss_timeout_sec = 0,
     179             :         .reconnect_delay_sec = 0,
     180             :         .fast_io_fail_timeout_sec = 0,
     181             :         .transport_ack_timeout = 0,
     182             :         .disable_auto_failback = false,
     183             :         .generate_uuids = false,
     184             :         .transport_tos = 0,
     185             :         .nvme_error_stat = false,
     186             :         .io_path_stat = false,
     187             :         .allow_accel_sequence = false,
     188             :         .dhchap_digests = BDEV_NVME_DEFAULT_DIGESTS,
     189             :         .dhchap_dhgroups = BDEV_NVME_DEFAULT_DHGROUPS,
     190             : };
     191             : 
     192             : #define NVME_HOTPLUG_POLL_PERIOD_MAX                    10000000ULL
     193             : #define NVME_HOTPLUG_POLL_PERIOD_DEFAULT                100000ULL
     194             : 
     195             : static int g_hot_insert_nvme_controller_index = 0;
     196             : static uint64_t g_nvme_hotplug_poll_period_us = NVME_HOTPLUG_POLL_PERIOD_DEFAULT;
     197             : static bool g_nvme_hotplug_enabled = false;
     198             : struct spdk_thread *g_bdev_nvme_init_thread;
     199             : static struct spdk_poller *g_hotplug_poller;
     200             : static struct spdk_poller *g_hotplug_probe_poller;
     201             : static struct spdk_nvme_probe_ctx *g_hotplug_probe_ctx;
     202             : 
     203             : static void nvme_ctrlr_populate_namespaces(struct nvme_ctrlr *nvme_ctrlr,
     204             :                 struct nvme_async_probe_ctx *ctx);
     205             : static void nvme_ctrlr_populate_namespaces_done(struct nvme_ctrlr *nvme_ctrlr,
     206             :                 struct nvme_async_probe_ctx *ctx);
     207             : static int bdev_nvme_library_init(void);
     208             : static void bdev_nvme_library_fini(void);
     209             : static void _bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch,
     210             :                                       struct spdk_bdev_io *bdev_io);
     211             : static void bdev_nvme_submit_request(struct spdk_io_channel *ch,
     212             :                                      struct spdk_bdev_io *bdev_io);
     213             : static int bdev_nvme_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     214             :                            void *md, uint64_t lba_count, uint64_t lba,
     215             :                            uint32_t flags, struct spdk_memory_domain *domain, void *domain_ctx,
     216             :                            struct spdk_accel_sequence *seq);
     217             : static int bdev_nvme_no_pi_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     218             :                                  void *md, uint64_t lba_count, uint64_t lba);
     219             : static int bdev_nvme_writev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     220             :                             void *md, uint64_t lba_count, uint64_t lba,
     221             :                             uint32_t flags, struct spdk_memory_domain *domain, void *domain_ctx,
     222             :                             struct spdk_accel_sequence *seq,
     223             :                             union spdk_bdev_nvme_cdw12 cdw12, union spdk_bdev_nvme_cdw13 cdw13);
     224             : static int bdev_nvme_zone_appendv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     225             :                                   void *md, uint64_t lba_count,
     226             :                                   uint64_t zslba, uint32_t flags);
     227             : static int bdev_nvme_comparev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     228             :                               void *md, uint64_t lba_count, uint64_t lba,
     229             :                               uint32_t flags);
     230             : static int bdev_nvme_comparev_and_writev(struct nvme_bdev_io *bio,
     231             :                 struct iovec *cmp_iov, int cmp_iovcnt, struct iovec *write_iov,
     232             :                 int write_iovcnt, void *md, uint64_t lba_count, uint64_t lba,
     233             :                 uint32_t flags);
     234             : static int bdev_nvme_get_zone_info(struct nvme_bdev_io *bio, uint64_t zone_id,
     235             :                                    uint32_t num_zones, struct spdk_bdev_zone_info *info);
     236             : static int bdev_nvme_zone_management(struct nvme_bdev_io *bio, uint64_t zone_id,
     237             :                                      enum spdk_bdev_zone_action action);
     238             : static void bdev_nvme_admin_passthru(struct nvme_bdev_channel *nbdev_ch,
     239             :                                      struct nvme_bdev_io *bio,
     240             :                                      struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes);
     241             : static int bdev_nvme_io_passthru(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     242             :                                  void *buf, size_t nbytes);
     243             : static int bdev_nvme_io_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     244             :                                     void *buf, size_t nbytes, void *md_buf, size_t md_len);
     245             : static int bdev_nvme_iov_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     246             :                                      struct iovec *iov, int iovcnt, size_t nbytes,
     247             :                                      void *md_buf, size_t md_len);
     248             : static void bdev_nvme_abort(struct nvme_bdev_channel *nbdev_ch,
     249             :                             struct nvme_bdev_io *bio, struct nvme_bdev_io *bio_to_abort);
     250             : static void bdev_nvme_reset_io(struct nvme_bdev *nbdev, struct nvme_bdev_io *bio);
     251             : static int bdev_nvme_reset_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
     252             : static int bdev_nvme_failover_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
     253             : static void remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr);
     254             : static int nvme_ctrlr_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr);
     255             : 
     256             : static struct nvme_ns *nvme_ns_alloc(void);
     257             : static void nvme_ns_free(struct nvme_ns *ns);
     258             : 
     259             : static int
     260         176 : nvme_ns_cmp(struct nvme_ns *ns1, struct nvme_ns *ns2)
     261             : {
     262         176 :         return ns1->id < ns2->id ? -1 : ns1->id > ns2->id;
     263             : }
     264             : 
     265        1089 : RB_GENERATE_STATIC(nvme_ns_tree, nvme_ns, node, nvme_ns_cmp);
     266             : 
     267             : struct spdk_nvme_qpair *
     268           1 : bdev_nvme_get_io_qpair(struct spdk_io_channel *ctrlr_io_ch)
     269             : {
     270             :         struct nvme_ctrlr_channel *ctrlr_ch;
     271             : 
     272           1 :         assert(ctrlr_io_ch != NULL);
     273             : 
     274           1 :         ctrlr_ch = spdk_io_channel_get_ctx(ctrlr_io_ch);
     275             : 
     276           1 :         return ctrlr_ch->qpair->qpair;
     277             : }
     278             : 
     279             : static int
     280           0 : bdev_nvme_get_ctx_size(void)
     281             : {
     282           0 :         return sizeof(struct nvme_bdev_io);
     283             : }
     284             : 
     285             : static struct spdk_bdev_module nvme_if = {
     286             :         .name = "nvme",
     287             :         .async_fini = true,
     288             :         .module_init = bdev_nvme_library_init,
     289             :         .module_fini = bdev_nvme_library_fini,
     290             :         .config_json = bdev_nvme_config_json,
     291             :         .get_ctx_size = bdev_nvme_get_ctx_size,
     292             : 
     293             : };
     294           1 : SPDK_BDEV_MODULE_REGISTER(nvme, &nvme_if)
     295             : 
     296             : struct nvme_bdev_ctrlrs g_nvme_bdev_ctrlrs = TAILQ_HEAD_INITIALIZER(g_nvme_bdev_ctrlrs);
     297             : pthread_mutex_t g_bdev_nvme_mutex = PTHREAD_MUTEX_INITIALIZER;
     298             : bool g_bdev_nvme_module_finish;
     299             : 
     300             : struct nvme_bdev_ctrlr *
     301         333 : nvme_bdev_ctrlr_get_by_name(const char *name)
     302             : {
     303             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     304             : 
     305         333 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     306         171 :                 if (strcmp(name, nbdev_ctrlr->name) == 0) {
     307         171 :                         break;
     308             :                 }
     309           0 :         }
     310             : 
     311         333 :         return nbdev_ctrlr;
     312             : }
     313             : 
     314             : static struct nvme_ctrlr *
     315          59 : nvme_bdev_ctrlr_get_ctrlr(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     316             :                           const struct spdk_nvme_transport_id *trid, const char *hostnqn)
     317             : {
     318             :         const struct spdk_nvme_ctrlr_opts *opts;
     319             :         struct nvme_ctrlr *nvme_ctrlr;
     320             : 
     321         100 :         TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
     322          75 :                 opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
     323          75 :                 if (spdk_nvme_transport_id_compare(trid, &nvme_ctrlr->active_path_id->trid) == 0 &&
     324          34 :                     strcmp(hostnqn, opts->hostnqn) == 0) {
     325          34 :                         break;
     326             :                 }
     327          41 :         }
     328             : 
     329          59 :         return nvme_ctrlr;
     330             : }
     331             : 
     332             : struct nvme_ctrlr *
     333           0 : nvme_bdev_ctrlr_get_ctrlr_by_id(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     334             :                                 uint16_t cntlid)
     335             : {
     336             :         struct nvme_ctrlr *nvme_ctrlr;
     337             :         const struct spdk_nvme_ctrlr_data *cdata;
     338             : 
     339           0 :         TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
     340           0 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
     341           0 :                 if (cdata->cntlid == cntlid) {
     342           0 :                         break;
     343             :                 }
     344           0 :         }
     345             : 
     346           0 :         return nvme_ctrlr;
     347             : }
     348             : 
     349             : static struct nvme_bdev *
     350          75 : nvme_bdev_ctrlr_get_bdev(struct nvme_bdev_ctrlr *nbdev_ctrlr, uint32_t nsid)
     351             : {
     352             :         struct nvme_bdev *bdev;
     353             : 
     354          75 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     355         109 :         TAILQ_FOREACH(bdev, &nbdev_ctrlr->bdevs, tailq) {
     356          69 :                 if (bdev->nsid == nsid) {
     357          35 :                         break;
     358             :                 }
     359          34 :         }
     360          75 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     361             : 
     362          75 :         return bdev;
     363             : }
     364             : 
     365             : struct nvme_ns *
     366         145 : nvme_ctrlr_get_ns(struct nvme_ctrlr *nvme_ctrlr, uint32_t nsid)
     367             : {
     368             :         struct nvme_ns ns;
     369             : 
     370         145 :         assert(nsid > 0);
     371             : 
     372         145 :         ns.id = nsid;
     373         145 :         return RB_FIND(nvme_ns_tree, &nvme_ctrlr->namespaces, &ns);
     374             : }
     375             : 
     376             : struct nvme_ns *
     377         165 : nvme_ctrlr_get_first_active_ns(struct nvme_ctrlr *nvme_ctrlr)
     378             : {
     379         165 :         return RB_MIN(nvme_ns_tree, &nvme_ctrlr->namespaces);
     380             : }
     381             : 
     382             : struct nvme_ns *
     383          74 : nvme_ctrlr_get_next_active_ns(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *ns)
     384             : {
     385          74 :         if (ns == NULL) {
     386           0 :                 return NULL;
     387             :         }
     388             : 
     389          74 :         return RB_NEXT(nvme_ns_tree, &nvme_ctrlr->namespaces, ns);
     390          74 : }
     391             : 
     392             : static struct nvme_ctrlr *
     393          53 : nvme_ctrlr_get(const struct spdk_nvme_transport_id *trid, const char *hostnqn)
     394             : {
     395             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
     396          53 :         struct nvme_ctrlr       *nvme_ctrlr = NULL;
     397             : 
     398          53 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     399          72 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     400          19 :                 nvme_ctrlr = nvme_bdev_ctrlr_get_ctrlr(nbdev_ctrlr, trid, hostnqn);
     401          19 :                 if (nvme_ctrlr != NULL) {
     402           0 :                         break;
     403             :                 }
     404          19 :         }
     405          53 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     406             : 
     407          53 :         return nvme_ctrlr;
     408             : }
     409             : 
     410             : struct nvme_ctrlr *
     411         126 : nvme_ctrlr_get_by_name(const char *name)
     412             : {
     413             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     414         126 :         struct nvme_ctrlr *nvme_ctrlr = NULL;
     415             : 
     416         126 :         if (name == NULL) {
     417           0 :                 return NULL;
     418             :         }
     419             : 
     420         126 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     421         126 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
     422         126 :         if (nbdev_ctrlr != NULL) {
     423          60 :                 nvme_ctrlr = TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
     424          60 :         }
     425         126 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     426             : 
     427         126 :         return nvme_ctrlr;
     428         126 : }
     429             : 
     430             : void
     431           0 : nvme_bdev_ctrlr_for_each(nvme_bdev_ctrlr_for_each_fn fn, void *ctx)
     432             : {
     433             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     434             : 
     435           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     436           0 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     437           0 :                 fn(nbdev_ctrlr, ctx);
     438           0 :         }
     439           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     440           0 : }
     441             : 
     442             : struct nvme_ctrlr_channel_iter {
     443             :         nvme_ctrlr_for_each_channel_msg fn;
     444             :         nvme_ctrlr_for_each_channel_done cpl;
     445             :         struct spdk_io_channel_iter *i;
     446             :         void *ctx;
     447             : };
     448             : 
     449             : void
     450         166 : nvme_ctrlr_for_each_channel_continue(struct nvme_ctrlr_channel_iter *iter, int status)
     451             : {
     452         166 :         spdk_for_each_channel_continue(iter->i, status);
     453         166 : }
     454             : 
     455             : static void
     456         166 : nvme_ctrlr_each_channel_msg(struct spdk_io_channel_iter *i)
     457             : {
     458         166 :         struct nvme_ctrlr_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     459         166 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
     460         166 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     461         166 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(ch);
     462             : 
     463         166 :         iter->i = i;
     464         166 :         iter->fn(iter, nvme_ctrlr, ctrlr_ch, iter->ctx);
     465         166 : }
     466             : 
     467             : static void
     468          97 : nvme_ctrlr_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
     469             : {
     470          97 :         struct nvme_ctrlr_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     471          97 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
     472             : 
     473          97 :         iter->i = i;
     474          97 :         iter->cpl(nvme_ctrlr, iter->ctx, status);
     475             : 
     476          97 :         free(iter);
     477          97 : }
     478             : 
     479             : void
     480          97 : nvme_ctrlr_for_each_channel(struct nvme_ctrlr *nvme_ctrlr,
     481             :                             nvme_ctrlr_for_each_channel_msg fn, void *ctx,
     482             :                             nvme_ctrlr_for_each_channel_done cpl)
     483             : {
     484             :         struct nvme_ctrlr_channel_iter *iter;
     485             : 
     486          97 :         assert(nvme_ctrlr != NULL && fn != NULL);
     487             : 
     488          97 :         iter = calloc(1, sizeof(struct nvme_ctrlr_channel_iter));
     489          97 :         if (iter == NULL) {
     490           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
     491           0 :                 assert(false);
     492             :                 return;
     493             :         }
     494             : 
     495          97 :         iter->fn = fn;
     496          97 :         iter->cpl = cpl;
     497          97 :         iter->ctx = ctx;
     498             : 
     499         194 :         spdk_for_each_channel(nvme_ctrlr, nvme_ctrlr_each_channel_msg,
     500          97 :                               iter, nvme_ctrlr_each_channel_cpl);
     501          97 : }
     502             : 
     503             : struct nvme_bdev_channel_iter {
     504             :         nvme_bdev_for_each_channel_msg fn;
     505             :         nvme_bdev_for_each_channel_done cpl;
     506             :         struct spdk_io_channel_iter *i;
     507             :         void *ctx;
     508             : };
     509             : 
     510             : void
     511          69 : nvme_bdev_for_each_channel_continue(struct nvme_bdev_channel_iter *iter, int status)
     512             : {
     513          69 :         spdk_for_each_channel_continue(iter->i, status);
     514          69 : }
     515             : 
     516             : static void
     517          69 : nvme_bdev_each_channel_msg(struct spdk_io_channel_iter *i)
     518             : {
     519          69 :         struct nvme_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     520          69 :         struct nvme_bdev *nbdev = spdk_io_channel_iter_get_io_device(i);
     521          69 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     522          69 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
     523             : 
     524          69 :         iter->i = i;
     525          69 :         iter->fn(iter, nbdev, nbdev_ch, iter->ctx);
     526          69 : }
     527             : 
     528             : static void
     529          60 : nvme_bdev_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
     530             : {
     531          60 :         struct nvme_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     532          60 :         struct nvme_bdev *nbdev = spdk_io_channel_iter_get_io_device(i);
     533             : 
     534          60 :         iter->i = i;
     535          60 :         iter->cpl(nbdev, iter->ctx, status);
     536             : 
     537          60 :         free(iter);
     538          60 : }
     539             : 
     540             : void
     541          60 : nvme_bdev_for_each_channel(struct nvme_bdev *nbdev,
     542             :                            nvme_bdev_for_each_channel_msg fn, void *ctx,
     543             :                            nvme_bdev_for_each_channel_done cpl)
     544             : {
     545             :         struct nvme_bdev_channel_iter *iter;
     546             : 
     547          60 :         assert(nbdev != NULL && fn != NULL);
     548             : 
     549          60 :         iter = calloc(1, sizeof(struct nvme_bdev_channel_iter));
     550          60 :         if (iter == NULL) {
     551           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
     552           0 :                 assert(false);
     553             :                 return;
     554             :         }
     555             : 
     556          60 :         iter->fn = fn;
     557          60 :         iter->cpl = cpl;
     558          60 :         iter->ctx = ctx;
     559             : 
     560          60 :         spdk_for_each_channel(nbdev, nvme_bdev_each_channel_msg, iter,
     561             :                               nvme_bdev_each_channel_cpl);
     562          60 : }
     563             : 
     564             : void
     565           0 : nvme_bdev_dump_trid_json(const struct spdk_nvme_transport_id *trid, struct spdk_json_write_ctx *w)
     566             : {
     567             :         const char *trtype_str;
     568             :         const char *adrfam_str;
     569             : 
     570           0 :         trtype_str = spdk_nvme_transport_id_trtype_str(trid->trtype);
     571           0 :         if (trtype_str) {
     572           0 :                 spdk_json_write_named_string(w, "trtype", trtype_str);
     573           0 :         }
     574             : 
     575           0 :         adrfam_str = spdk_nvme_transport_id_adrfam_str(trid->adrfam);
     576           0 :         if (adrfam_str) {
     577           0 :                 spdk_json_write_named_string(w, "adrfam", adrfam_str);
     578           0 :         }
     579             : 
     580           0 :         if (trid->traddr[0] != '\0') {
     581           0 :                 spdk_json_write_named_string(w, "traddr", trid->traddr);
     582           0 :         }
     583             : 
     584           0 :         if (trid->trsvcid[0] != '\0') {
     585           0 :                 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid);
     586           0 :         }
     587             : 
     588           0 :         if (trid->subnqn[0] != '\0') {
     589           0 :                 spdk_json_write_named_string(w, "subnqn", trid->subnqn);
     590           0 :         }
     591           0 : }
     592             : 
     593             : static void
     594          61 : nvme_bdev_ctrlr_delete(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     595             :                        struct nvme_ctrlr *nvme_ctrlr)
     596             : {
     597             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_delete, nvme_ctrlr->nbdev_ctrlr->name);
     598          61 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     599             : 
     600          61 :         TAILQ_REMOVE(&nbdev_ctrlr->ctrlrs, nvme_ctrlr, tailq);
     601          61 :         if (!TAILQ_EMPTY(&nbdev_ctrlr->ctrlrs)) {
     602          15 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
     603             : 
     604          15 :                 return;
     605             :         }
     606          46 :         TAILQ_REMOVE(&g_nvme_bdev_ctrlrs, nbdev_ctrlr, tailq);
     607             : 
     608          46 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     609             : 
     610          46 :         assert(TAILQ_EMPTY(&nbdev_ctrlr->bdevs));
     611             : 
     612          46 :         free(nbdev_ctrlr->name);
     613          46 :         free(nbdev_ctrlr);
     614          61 : }
     615             : 
     616             : static void
     617          62 : _nvme_ctrlr_delete(struct nvme_ctrlr *nvme_ctrlr)
     618             : {
     619             :         struct nvme_path_id *path_id, *tmp_path;
     620             :         struct nvme_ns *ns, *tmp_ns;
     621             : 
     622          62 :         free(nvme_ctrlr->copied_ana_desc);
     623          62 :         spdk_free(nvme_ctrlr->ana_log_page);
     624             : 
     625          62 :         if (nvme_ctrlr->opal_dev) {
     626           0 :                 spdk_opal_dev_destruct(nvme_ctrlr->opal_dev);
     627           0 :                 nvme_ctrlr->opal_dev = NULL;
     628           0 :         }
     629             : 
     630          62 :         if (nvme_ctrlr->nbdev_ctrlr) {
     631          61 :                 nvme_bdev_ctrlr_delete(nvme_ctrlr->nbdev_ctrlr, nvme_ctrlr);
     632          61 :         }
     633             : 
     634          62 :         RB_FOREACH_SAFE(ns, nvme_ns_tree, &nvme_ctrlr->namespaces, tmp_ns) {
     635           0 :                 RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, ns);
     636           0 :                 nvme_ns_free(ns);
     637           0 :         }
     638             : 
     639         124 :         TAILQ_FOREACH_SAFE(path_id, &nvme_ctrlr->trids, link, tmp_path) {
     640          62 :                 TAILQ_REMOVE(&nvme_ctrlr->trids, path_id, link);
     641          62 :                 free(path_id);
     642          62 :         }
     643             : 
     644          62 :         pthread_mutex_destroy(&nvme_ctrlr->mutex);
     645          62 :         spdk_keyring_put_key(nvme_ctrlr->psk);
     646          62 :         spdk_keyring_put_key(nvme_ctrlr->dhchap_key);
     647          62 :         spdk_keyring_put_key(nvme_ctrlr->dhchap_ctrlr_key);
     648          62 :         free(nvme_ctrlr);
     649             : 
     650          62 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     651          62 :         if (g_bdev_nvme_module_finish && TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
     652           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
     653           0 :                 spdk_io_device_unregister(&g_nvme_bdev_ctrlrs, NULL);
     654           0 :                 spdk_bdev_module_fini_done();
     655           0 :                 return;
     656             :         }
     657          62 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     658          62 : }
     659             : 
     660             : static int
     661          62 : nvme_detach_poller(void *arg)
     662             : {
     663          62 :         struct nvme_ctrlr *nvme_ctrlr = arg;
     664             :         int rc;
     665             : 
     666          62 :         rc = spdk_nvme_detach_poll_async(nvme_ctrlr->detach_ctx);
     667          62 :         if (rc != -EAGAIN) {
     668          62 :                 spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
     669          62 :                 _nvme_ctrlr_delete(nvme_ctrlr);
     670          62 :         }
     671             : 
     672          62 :         return SPDK_POLLER_BUSY;
     673             : }
     674             : 
     675             : static void
     676          62 : nvme_ctrlr_delete(struct nvme_ctrlr *nvme_ctrlr)
     677             : {
     678             :         int rc;
     679             : 
     680          62 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
     681             : 
     682          62 :         if (spdk_interrupt_mode_is_enabled()) {
     683           0 :                 spdk_interrupt_unregister(&nvme_ctrlr->intr);
     684           0 :         }
     685             : 
     686             :         /* First, unregister the adminq poller, as the driver will poll adminq if necessary */
     687          62 :         spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
     688             : 
     689             :         /* If we got here, the reset/detach poller cannot be active */
     690          62 :         assert(nvme_ctrlr->reset_detach_poller == NULL);
     691          62 :         nvme_ctrlr->reset_detach_poller = SPDK_POLLER_REGISTER(nvme_detach_poller,
     692             :                                           nvme_ctrlr, 1000);
     693          62 :         if (nvme_ctrlr->reset_detach_poller == NULL) {
     694           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to register detach poller\n");
     695           0 :                 goto error;
     696             :         }
     697             : 
     698          62 :         rc = spdk_nvme_detach_async(nvme_ctrlr->ctrlr, &nvme_ctrlr->detach_ctx);
     699          62 :         if (rc != 0) {
     700           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to detach the NVMe controller\n");
     701           0 :                 goto error;
     702             :         }
     703             : 
     704          62 :         return;
     705             : error:
     706             :         /* We don't have a good way to handle errors here, so just do what we can and delete the
     707             :          * controller without detaching the underlying NVMe device.
     708             :          */
     709           0 :         spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
     710           0 :         _nvme_ctrlr_delete(nvme_ctrlr);
     711          62 : }
     712             : 
     713             : static void
     714          61 : nvme_ctrlr_unregister_cb(void *io_device)
     715             : {
     716          61 :         struct nvme_ctrlr *nvme_ctrlr = io_device;
     717             : 
     718          61 :         nvme_ctrlr_delete(nvme_ctrlr);
     719          61 : }
     720             : 
     721             : static void
     722          61 : nvme_ctrlr_unregister(void *ctx)
     723             : {
     724          61 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
     725             : 
     726          61 :         spdk_io_device_unregister(nvme_ctrlr, nvme_ctrlr_unregister_cb);
     727          61 : }
     728             : 
     729             : static bool
     730         249 : nvme_ctrlr_can_be_unregistered(struct nvme_ctrlr *nvme_ctrlr)
     731             : {
     732         249 :         if (!nvme_ctrlr->destruct) {
     733         131 :                 return false;
     734             :         }
     735             : 
     736         118 :         if (nvme_ctrlr->ref > 0) {
     737          57 :                 return false;
     738             :         }
     739             : 
     740          61 :         if (nvme_ctrlr->resetting) {
     741           0 :                 return false;
     742             :         }
     743             : 
     744          61 :         if (nvme_ctrlr->ana_log_page_updating) {
     745           0 :                 return false;
     746             :         }
     747             : 
     748          61 :         if (nvme_ctrlr->io_path_cache_clearing) {
     749           0 :                 return false;
     750             :         }
     751             : 
     752          61 :         return true;
     753         249 : }
     754             : 
     755             : static void
     756         172 : nvme_ctrlr_put_ref(struct nvme_ctrlr *nvme_ctrlr)
     757             : {
     758         172 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
     759             :         SPDK_DTRACE_PROBE2(bdev_nvme_ctrlr_release, nvme_ctrlr->nbdev_ctrlr->name, nvme_ctrlr->ref);
     760             : 
     761         172 :         assert(nvme_ctrlr->ref > 0);
     762         172 :         nvme_ctrlr->ref--;
     763             : 
     764         172 :         if (!nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
     765         111 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
     766         111 :                 return;
     767             :         }
     768             : 
     769          61 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
     770             : 
     771          61 :         spdk_thread_exec_msg(nvme_ctrlr->thread, nvme_ctrlr_unregister, nvme_ctrlr);
     772         172 : }
     773             : 
     774             : static void
     775         111 : nvme_ctrlr_get_ref(struct nvme_ctrlr *nvme_ctrlr)
     776             : {
     777         111 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
     778         111 :         nvme_ctrlr->ref++;
     779         111 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
     780         111 : }
     781             : 
     782             : static void
     783         259 : bdev_nvme_clear_current_io_path(struct nvme_bdev_channel *nbdev_ch)
     784             : {
     785         259 :         nbdev_ch->current_io_path = NULL;
     786         259 :         nbdev_ch->rr_counter = 0;
     787         259 : }
     788             : 
     789             : static struct nvme_io_path *
     790           8 : _bdev_nvme_get_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_ns)
     791             : {
     792             :         struct nvme_io_path *io_path;
     793             : 
     794          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
     795          15 :                 if (io_path->nvme_ns == nvme_ns) {
     796           7 :                         break;
     797             :                 }
     798           8 :         }
     799             : 
     800           8 :         return io_path;
     801             : }
     802             : 
     803             : static struct nvme_io_path *
     804          39 : nvme_io_path_alloc(void)
     805             : {
     806             :         struct nvme_io_path *io_path;
     807             : 
     808          39 :         io_path = calloc(1, sizeof(*io_path));
     809          39 :         if (io_path == NULL) {
     810           0 :                 SPDK_ERRLOG("Failed to alloc io_path.\n");
     811           0 :                 return NULL;
     812             :         }
     813             : 
     814          39 :         if (g_opts.io_path_stat) {
     815           0 :                 io_path->stat = calloc(1, sizeof(struct spdk_bdev_io_stat));
     816           0 :                 if (io_path->stat == NULL) {
     817           0 :                         free(io_path);
     818           0 :                         SPDK_ERRLOG("Failed to alloc io_path stat.\n");
     819           0 :                         return NULL;
     820             :                 }
     821           0 :                 spdk_bdev_reset_io_stat(io_path->stat, SPDK_BDEV_RESET_STAT_MAXMIN);
     822           0 :         }
     823             : 
     824          39 :         return io_path;
     825          39 : }
     826             : 
     827             : static void
     828          39 : nvme_io_path_free(struct nvme_io_path *io_path)
     829             : {
     830          39 :         free(io_path->stat);
     831          39 :         free(io_path);
     832          39 : }
     833             : 
     834             : static int
     835          39 : _bdev_nvme_add_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_ns)
     836             : {
     837             :         struct nvme_io_path *io_path;
     838             :         struct spdk_io_channel *ch;
     839             :         struct nvme_ctrlr_channel *ctrlr_ch;
     840             :         struct nvme_qpair *nvme_qpair;
     841             : 
     842          39 :         io_path = nvme_io_path_alloc();
     843          39 :         if (io_path == NULL) {
     844           0 :                 return -ENOMEM;
     845             :         }
     846             : 
     847          39 :         io_path->nvme_ns = nvme_ns;
     848             : 
     849          39 :         ch = spdk_get_io_channel(nvme_ns->ctrlr);
     850          39 :         if (ch == NULL) {
     851           0 :                 nvme_io_path_free(io_path);
     852           0 :                 SPDK_ERRLOG("Failed to alloc io_channel.\n");
     853           0 :                 return -ENOMEM;
     854             :         }
     855             : 
     856          39 :         ctrlr_ch = spdk_io_channel_get_ctx(ch);
     857             : 
     858          39 :         nvme_qpair = ctrlr_ch->qpair;
     859          39 :         assert(nvme_qpair != NULL);
     860             : 
     861          39 :         io_path->qpair = nvme_qpair;
     862          39 :         TAILQ_INSERT_TAIL(&nvme_qpair->io_path_list, io_path, tailq);
     863             : 
     864          39 :         io_path->nbdev_ch = nbdev_ch;
     865          39 :         STAILQ_INSERT_TAIL(&nbdev_ch->io_path_list, io_path, stailq);
     866             : 
     867          39 :         bdev_nvme_clear_current_io_path(nbdev_ch);
     868             : 
     869          39 :         return 0;
     870          39 : }
     871             : 
     872             : static void
     873          39 : bdev_nvme_clear_retry_io_path(struct nvme_bdev_channel *nbdev_ch,
     874             :                               struct nvme_io_path *io_path)
     875             : {
     876             :         struct nvme_bdev_io *bio;
     877             : 
     878          40 :         TAILQ_FOREACH(bio, &nbdev_ch->retry_io_list, retry_link) {
     879           1 :                 if (bio->io_path == io_path) {
     880           1 :                         bio->io_path = NULL;
     881           1 :                 }
     882           1 :         }
     883          39 : }
     884             : 
     885             : static void
     886          39 : _bdev_nvme_delete_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_io_path *io_path)
     887             : {
     888             :         struct spdk_io_channel *ch;
     889             :         struct nvme_qpair *nvme_qpair;
     890             :         struct nvme_ctrlr_channel *ctrlr_ch;
     891             :         struct nvme_bdev *nbdev;
     892             : 
     893          39 :         nbdev = spdk_io_channel_get_io_device(spdk_io_channel_from_ctx(nbdev_ch));
     894             : 
     895             :         /* Add the statistics to nvme_ns before this path is destroyed. */
     896          39 :         pthread_mutex_lock(&nbdev->mutex);
     897          39 :         if (nbdev->ref != 0 && io_path->nvme_ns->stat != NULL && io_path->stat != NULL) {
     898           0 :                 spdk_bdev_add_io_stat(io_path->nvme_ns->stat, io_path->stat);
     899           0 :         }
     900          39 :         pthread_mutex_unlock(&nbdev->mutex);
     901             : 
     902          39 :         bdev_nvme_clear_current_io_path(nbdev_ch);
     903          39 :         bdev_nvme_clear_retry_io_path(nbdev_ch, io_path);
     904             : 
     905          41 :         STAILQ_REMOVE(&nbdev_ch->io_path_list, io_path, nvme_io_path, stailq);
     906          39 :         io_path->nbdev_ch = NULL;
     907             : 
     908          39 :         nvme_qpair = io_path->qpair;
     909          39 :         assert(nvme_qpair != NULL);
     910             : 
     911          39 :         ctrlr_ch = nvme_qpair->ctrlr_ch;
     912          39 :         assert(ctrlr_ch != NULL);
     913             : 
     914          39 :         ch = spdk_io_channel_from_ctx(ctrlr_ch);
     915          39 :         spdk_put_io_channel(ch);
     916             : 
     917             :         /* After an io_path is removed, I/Os submitted to it may complete and update statistics
     918             :          * of the io_path. To avoid heap-use-after-free error from this case, do not free the
     919             :          * io_path here but free the io_path when the associated qpair is freed. It is ensured
     920             :          * that all I/Os submitted to the io_path are completed when the associated qpair is freed.
     921             :          */
     922          39 : }
     923             : 
     924             : static void
     925          26 : _bdev_nvme_delete_io_paths(struct nvme_bdev_channel *nbdev_ch)
     926             : {
     927             :         struct nvme_io_path *io_path, *tmp_io_path;
     928             : 
     929          63 :         STAILQ_FOREACH_SAFE(io_path, &nbdev_ch->io_path_list, stailq, tmp_io_path) {
     930          37 :                 _bdev_nvme_delete_io_path(nbdev_ch, io_path);
     931          37 :         }
     932          26 : }
     933             : 
     934             : static int
     935          26 : bdev_nvme_create_bdev_channel_cb(void *io_device, void *ctx_buf)
     936             : {
     937          26 :         struct nvme_bdev_channel *nbdev_ch = ctx_buf;
     938          26 :         struct nvme_bdev *nbdev = io_device;
     939             :         struct nvme_ns *nvme_ns;
     940             :         int rc;
     941             : 
     942          26 :         STAILQ_INIT(&nbdev_ch->io_path_list);
     943          26 :         TAILQ_INIT(&nbdev_ch->retry_io_list);
     944             : 
     945          26 :         pthread_mutex_lock(&nbdev->mutex);
     946             : 
     947          26 :         nbdev_ch->mp_policy = nbdev->mp_policy;
     948          26 :         nbdev_ch->mp_selector = nbdev->mp_selector;
     949          26 :         nbdev_ch->rr_min_io = nbdev->rr_min_io;
     950             : 
     951          63 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
     952          37 :                 rc = _bdev_nvme_add_io_path(nbdev_ch, nvme_ns);
     953          37 :                 if (rc != 0) {
     954           0 :                         pthread_mutex_unlock(&nbdev->mutex);
     955             : 
     956           0 :                         _bdev_nvme_delete_io_paths(nbdev_ch);
     957           0 :                         return rc;
     958             :                 }
     959          37 :         }
     960          26 :         pthread_mutex_unlock(&nbdev->mutex);
     961             : 
     962          26 :         return 0;
     963          26 : }
     964             : 
     965             : /* If cpl != NULL, complete the bdev_io with nvme status based on 'cpl'.
     966             :  * If cpl == NULL, complete the bdev_io with bdev status based on 'status'.
     967             :  */
     968             : static inline void
     969          58 : __bdev_nvme_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status,
     970             :                         const struct spdk_nvme_cpl *cpl)
     971             : {
     972          58 :         spdk_trace_record(TRACE_BDEV_NVME_IO_DONE, 0, 0, (uintptr_t)bdev_io->driver_ctx,
     973             :                           (uintptr_t)bdev_io);
     974          58 :         if (cpl) {
     975          29 :                 spdk_bdev_io_complete_nvme_status(bdev_io, cpl->cdw0, cpl->status.sct, cpl->status.sc);
     976          29 :         } else {
     977          29 :                 spdk_bdev_io_complete(bdev_io, status);
     978             :         }
     979          58 : }
     980             : 
     981             : static void bdev_nvme_abort_retry_ios(struct nvme_bdev_channel *nbdev_ch);
     982             : 
     983             : static void
     984          26 : bdev_nvme_destroy_bdev_channel_cb(void *io_device, void *ctx_buf)
     985             : {
     986          26 :         struct nvme_bdev_channel *nbdev_ch = ctx_buf;
     987             : 
     988          26 :         bdev_nvme_abort_retry_ios(nbdev_ch);
     989          26 :         _bdev_nvme_delete_io_paths(nbdev_ch);
     990          26 : }
     991             : 
     992             : static inline bool
     993          62 : bdev_nvme_io_type_is_admin(enum spdk_bdev_io_type io_type)
     994             : {
     995          62 :         switch (io_type) {
     996             :         case SPDK_BDEV_IO_TYPE_RESET:
     997             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
     998             :         case SPDK_BDEV_IO_TYPE_ABORT:
     999           5 :                 return true;
    1000             :         default:
    1001          57 :                 break;
    1002             :         }
    1003             : 
    1004          57 :         return false;
    1005          62 : }
    1006             : 
    1007             : static inline bool
    1008          98 : nvme_ns_is_active(struct nvme_ns *nvme_ns)
    1009             : {
    1010          98 :         if (spdk_unlikely(nvme_ns->ana_state_updating)) {
    1011           1 :                 return false;
    1012             :         }
    1013             : 
    1014          97 :         if (spdk_unlikely(nvme_ns->ns == NULL)) {
    1015           0 :                 return false;
    1016             :         }
    1017             : 
    1018          97 :         return true;
    1019          98 : }
    1020             : 
    1021             : static inline bool
    1022          86 : nvme_ns_is_accessible(struct nvme_ns *nvme_ns)
    1023             : {
    1024          86 :         if (spdk_unlikely(!nvme_ns_is_active(nvme_ns))) {
    1025           1 :                 return false;
    1026             :         }
    1027             : 
    1028          85 :         switch (nvme_ns->ana_state) {
    1029             :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1030             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1031          76 :                 return true;
    1032             :         default:
    1033           9 :                 break;
    1034             :         }
    1035             : 
    1036           9 :         return false;
    1037          86 : }
    1038             : 
    1039             : static inline bool
    1040         128 : nvme_qpair_is_connected(struct nvme_qpair *nvme_qpair)
    1041             : {
    1042         128 :         if (spdk_unlikely(nvme_qpair->qpair == NULL)) {
    1043          23 :                 return false;
    1044             :         }
    1045             : 
    1046         105 :         if (spdk_unlikely(spdk_nvme_qpair_get_failure_reason(nvme_qpair->qpair) !=
    1047             :                           SPDK_NVME_QPAIR_FAILURE_NONE)) {
    1048           2 :                 return false;
    1049             :         }
    1050             : 
    1051         103 :         if (spdk_unlikely(nvme_qpair->ctrlr_ch->reset_iter != NULL)) {
    1052           0 :                 return false;
    1053             :         }
    1054             : 
    1055         103 :         return true;
    1056         128 : }
    1057             : 
    1058             : static inline bool
    1059         102 : nvme_io_path_is_available(struct nvme_io_path *io_path)
    1060             : {
    1061         102 :         if (spdk_unlikely(!nvme_qpair_is_connected(io_path->qpair))) {
    1062          16 :                 return false;
    1063             :         }
    1064             : 
    1065          86 :         if (spdk_unlikely(!nvme_ns_is_accessible(io_path->nvme_ns))) {
    1066          10 :                 return false;
    1067             :         }
    1068             : 
    1069          76 :         return true;
    1070         102 : }
    1071             : 
    1072             : static inline bool
    1073           9 : nvme_ctrlr_is_failed(struct nvme_ctrlr *nvme_ctrlr)
    1074             : {
    1075           9 :         if (nvme_ctrlr->destruct) {
    1076           0 :                 return true;
    1077             :         }
    1078             : 
    1079           9 :         if (nvme_ctrlr->fast_io_fail_timedout) {
    1080           2 :                 return true;
    1081             :         }
    1082             : 
    1083           7 :         if (nvme_ctrlr->resetting) {
    1084           5 :                 if (nvme_ctrlr->opts.reconnect_delay_sec != 0) {
    1085           5 :                         return false;
    1086             :                 } else {
    1087           0 :                         return true;
    1088             :                 }
    1089             :         }
    1090             : 
    1091           2 :         if (nvme_ctrlr->reconnect_is_delayed) {
    1092           2 :                 return false;
    1093             :         }
    1094             : 
    1095           0 :         if (nvme_ctrlr->disabled) {
    1096           0 :                 return true;
    1097             :         }
    1098             : 
    1099           0 :         if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    1100           0 :                 return true;
    1101             :         } else {
    1102           0 :                 return false;
    1103             :         }
    1104           9 : }
    1105             : 
    1106             : static bool
    1107          20 : nvme_ctrlr_is_available(struct nvme_ctrlr *nvme_ctrlr)
    1108             : {
    1109          20 :         if (nvme_ctrlr->destruct) {
    1110           0 :                 return false;
    1111             :         }
    1112             : 
    1113          20 :         if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    1114           3 :                 return false;
    1115             :         }
    1116             : 
    1117          17 :         if (nvme_ctrlr->resetting || nvme_ctrlr->reconnect_is_delayed) {
    1118           1 :                 return false;
    1119             :         }
    1120             : 
    1121          16 :         if (nvme_ctrlr->disabled) {
    1122           0 :                 return false;
    1123             :         }
    1124             : 
    1125          16 :         return true;
    1126          20 : }
    1127             : 
    1128             : /* Simulate circular linked list. */
    1129             : static inline struct nvme_io_path *
    1130          99 : nvme_io_path_get_next(struct nvme_bdev_channel *nbdev_ch, struct nvme_io_path *prev_path)
    1131             : {
    1132             :         struct nvme_io_path *next_path;
    1133             : 
    1134          99 :         if (prev_path != NULL) {
    1135          39 :                 next_path = STAILQ_NEXT(prev_path, stailq);
    1136          39 :                 if (next_path != NULL) {
    1137          14 :                         return next_path;
    1138             :                 }
    1139          25 :         }
    1140             : 
    1141          85 :         return STAILQ_FIRST(&nbdev_ch->io_path_list);
    1142          99 : }
    1143             : 
    1144             : static struct nvme_io_path *
    1145          67 : _bdev_nvme_find_io_path(struct nvme_bdev_channel *nbdev_ch)
    1146             : {
    1147          67 :         struct nvme_io_path *io_path, *start, *non_optimized = NULL;
    1148             : 
    1149          67 :         start = nvme_io_path_get_next(nbdev_ch, nbdev_ch->current_io_path);
    1150             : 
    1151          67 :         io_path = start;
    1152          67 :         do {
    1153          79 :                 if (spdk_likely(nvme_io_path_is_available(io_path))) {
    1154          57 :                         switch (io_path->nvme_ns->ana_state) {
    1155             :                         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1156          47 :                                 nbdev_ch->current_io_path = io_path;
    1157          47 :                                 return io_path;
    1158             :                         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1159          10 :                                 if (non_optimized == NULL) {
    1160           7 :                                         non_optimized = io_path;
    1161           7 :                                 }
    1162          10 :                                 break;
    1163             :                         default:
    1164           0 :                                 assert(false);
    1165             :                                 break;
    1166             :                         }
    1167          10 :                 }
    1168          32 :                 io_path = nvme_io_path_get_next(nbdev_ch, io_path);
    1169          32 :         } while (io_path != start);
    1170             : 
    1171          20 :         if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    1172             :                 /* We come here only if there is no optimized path. Cache even non_optimized
    1173             :                  * path for load balance across multiple non_optimized paths.
    1174             :                  */
    1175           1 :                 nbdev_ch->current_io_path = non_optimized;
    1176           1 :         }
    1177             : 
    1178          20 :         return non_optimized;
    1179          67 : }
    1180             : 
    1181             : static struct nvme_io_path *
    1182           4 : _bdev_nvme_find_io_path_min_qd(struct nvme_bdev_channel *nbdev_ch)
    1183             : {
    1184             :         struct nvme_io_path *io_path;
    1185           4 :         struct nvme_io_path *optimized = NULL, *non_optimized = NULL;
    1186           4 :         uint32_t opt_min_qd = UINT32_MAX, non_opt_min_qd = UINT32_MAX;
    1187             :         uint32_t num_outstanding_reqs;
    1188             : 
    1189          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    1190          12 :                 if (spdk_unlikely(!nvme_qpair_is_connected(io_path->qpair))) {
    1191             :                         /* The device is currently resetting. */
    1192           0 :                         continue;
    1193             :                 }
    1194             : 
    1195          12 :                 if (spdk_unlikely(!nvme_ns_is_active(io_path->nvme_ns))) {
    1196           0 :                         continue;
    1197             :                 }
    1198             : 
    1199          12 :                 num_outstanding_reqs = spdk_nvme_qpair_get_num_outstanding_reqs(io_path->qpair->qpair);
    1200          12 :                 switch (io_path->nvme_ns->ana_state) {
    1201             :                 case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1202           6 :                         if (num_outstanding_reqs < opt_min_qd) {
    1203           5 :                                 opt_min_qd = num_outstanding_reqs;
    1204           5 :                                 optimized = io_path;
    1205           5 :                         }
    1206           6 :                         break;
    1207             :                 case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1208           3 :                         if (num_outstanding_reqs < non_opt_min_qd) {
    1209           3 :                                 non_opt_min_qd = num_outstanding_reqs;
    1210           3 :                                 non_optimized = io_path;
    1211           3 :                         }
    1212           3 :                         break;
    1213             :                 default:
    1214           3 :                         break;
    1215             :                 }
    1216          12 :         }
    1217             : 
    1218             :         /* don't cache io path for BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH selector */
    1219           4 :         if (optimized != NULL) {
    1220           3 :                 return optimized;
    1221             :         }
    1222             : 
    1223           1 :         return non_optimized;
    1224           4 : }
    1225             : 
    1226             : static inline struct nvme_io_path *
    1227         105 : bdev_nvme_find_io_path(struct nvme_bdev_channel *nbdev_ch)
    1228             : {
    1229         105 :         if (spdk_likely(nbdev_ch->current_io_path != NULL)) {
    1230          41 :                 if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE) {
    1231          31 :                         return nbdev_ch->current_io_path;
    1232          10 :                 } else if (nbdev_ch->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    1233          10 :                         if (++nbdev_ch->rr_counter < nbdev_ch->rr_min_io) {
    1234           3 :                                 return nbdev_ch->current_io_path;
    1235             :                         }
    1236           7 :                         nbdev_ch->rr_counter = 0;
    1237           7 :                 }
    1238           7 :         }
    1239             : 
    1240          71 :         if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE ||
    1241          14 :             nbdev_ch->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    1242          67 :                 return _bdev_nvme_find_io_path(nbdev_ch);
    1243             :         } else {
    1244           4 :                 return _bdev_nvme_find_io_path_min_qd(nbdev_ch);
    1245             :         }
    1246         105 : }
    1247             : 
    1248             : /* Return true if there is any io_path whose qpair is active or ctrlr is not failed,
    1249             :  * or false otherwise.
    1250             :  *
    1251             :  * If any io_path has an active qpair but find_io_path() returned NULL, its namespace
    1252             :  * is likely to be non-accessible now but may become accessible.
    1253             :  *
    1254             :  * If any io_path has an unfailed ctrlr but find_io_path() returned NULL, the ctrlr
    1255             :  * is likely to be resetting now but the reset may succeed. A ctrlr is set to unfailed
    1256             :  * when starting to reset it but it is set to failed when the reset failed. Hence, if
    1257             :  * a ctrlr is unfailed, it is likely that it works fine or is resetting.
    1258             :  */
    1259             : static bool
    1260          15 : any_io_path_may_become_available(struct nvme_bdev_channel *nbdev_ch)
    1261             : {
    1262             :         struct nvme_io_path *io_path;
    1263             : 
    1264          15 :         if (nbdev_ch->resetting) {
    1265           1 :                 return false;
    1266             :         }
    1267             : 
    1268          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    1269          14 :                 if (io_path->nvme_ns->ana_transition_timedout) {
    1270           0 :                         continue;
    1271             :                 }
    1272             : 
    1273          14 :                 if (nvme_qpair_is_connected(io_path->qpair) ||
    1274           9 :                     !nvme_ctrlr_is_failed(io_path->qpair->ctrlr)) {
    1275          12 :                         return true;
    1276             :                 }
    1277           2 :         }
    1278             : 
    1279           2 :         return false;
    1280          15 : }
    1281             : 
    1282             : static void
    1283          14 : bdev_nvme_retry_io(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
    1284             : {
    1285          14 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    1286             :         struct spdk_io_channel *ch;
    1287             : 
    1288          14 :         if (nbdev_io->io_path != NULL && nvme_io_path_is_available(nbdev_io->io_path)) {
    1289           3 :                 _bdev_nvme_submit_request(nbdev_ch, bdev_io);
    1290           3 :         } else {
    1291          11 :                 ch = spdk_io_channel_from_ctx(nbdev_ch);
    1292          11 :                 bdev_nvme_submit_request(ch, bdev_io);
    1293             :         }
    1294          14 : }
    1295             : 
    1296             : static int
    1297          14 : bdev_nvme_retry_ios(void *arg)
    1298             : {
    1299          14 :         struct nvme_bdev_channel *nbdev_ch = arg;
    1300             :         struct nvme_bdev_io *bio, *tmp_bio;
    1301             :         uint64_t now, delay_us;
    1302             : 
    1303          14 :         now = spdk_get_ticks();
    1304             : 
    1305          28 :         TAILQ_FOREACH_SAFE(bio, &nbdev_ch->retry_io_list, retry_link, tmp_bio) {
    1306          15 :                 if (bio->retry_ticks > now) {
    1307           1 :                         break;
    1308             :                 }
    1309             : 
    1310          14 :                 TAILQ_REMOVE(&nbdev_ch->retry_io_list, bio, retry_link);
    1311             : 
    1312          14 :                 bdev_nvme_retry_io(nbdev_ch, spdk_bdev_io_from_ctx(bio));
    1313          14 :         }
    1314             : 
    1315          14 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1316             : 
    1317          14 :         bio = TAILQ_FIRST(&nbdev_ch->retry_io_list);
    1318          14 :         if (bio != NULL) {
    1319           4 :                 delay_us = (bio->retry_ticks - now) * SPDK_SEC_TO_USEC / spdk_get_ticks_hz();
    1320             : 
    1321           4 :                 nbdev_ch->retry_io_poller = SPDK_POLLER_REGISTER(bdev_nvme_retry_ios, nbdev_ch,
    1322             :                                             delay_us);
    1323           4 :         }
    1324             : 
    1325          14 :         return SPDK_POLLER_BUSY;
    1326             : }
    1327             : 
    1328             : static void
    1329          16 : bdev_nvme_queue_retry_io(struct nvme_bdev_channel *nbdev_ch,
    1330             :                          struct nvme_bdev_io *bio, uint64_t delay_ms)
    1331             : {
    1332             :         struct nvme_bdev_io *tmp_bio;
    1333             : 
    1334          16 :         bio->retry_ticks = spdk_get_ticks() + delay_ms * spdk_get_ticks_hz() / 1000ULL;
    1335             : 
    1336          16 :         TAILQ_FOREACH_REVERSE(tmp_bio, &nbdev_ch->retry_io_list, retry_io_head, retry_link) {
    1337           1 :                 if (tmp_bio->retry_ticks <= bio->retry_ticks) {
    1338           1 :                         TAILQ_INSERT_AFTER(&nbdev_ch->retry_io_list, tmp_bio, bio,
    1339             :                                            retry_link);
    1340           1 :                         return;
    1341             :                 }
    1342           0 :         }
    1343             : 
    1344             :         /* No earlier I/Os were found. This I/O must be the new head. */
    1345          15 :         TAILQ_INSERT_HEAD(&nbdev_ch->retry_io_list, bio, retry_link);
    1346             : 
    1347          15 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1348             : 
    1349          15 :         nbdev_ch->retry_io_poller = SPDK_POLLER_REGISTER(bdev_nvme_retry_ios, nbdev_ch,
    1350             :                                     delay_ms * 1000ULL);
    1351          16 : }
    1352             : 
    1353             : static void
    1354          58 : bdev_nvme_abort_retry_ios(struct nvme_bdev_channel *nbdev_ch)
    1355             : {
    1356             :         struct nvme_bdev_io *bio, *tmp_bio;
    1357             : 
    1358          59 :         TAILQ_FOREACH_SAFE(bio, &nbdev_ch->retry_io_list, retry_link, tmp_bio) {
    1359           1 :                 TAILQ_REMOVE(&nbdev_ch->retry_io_list, bio, retry_link);
    1360           1 :                 __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), SPDK_BDEV_IO_STATUS_ABORTED, NULL);
    1361           1 :         }
    1362             : 
    1363          58 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1364          58 : }
    1365             : 
    1366             : static int
    1367           6 : bdev_nvme_abort_retry_io(struct nvme_bdev_channel *nbdev_ch,
    1368             :                          struct nvme_bdev_io *bio_to_abort)
    1369             : {
    1370             :         struct nvme_bdev_io *bio;
    1371             : 
    1372           6 :         TAILQ_FOREACH(bio, &nbdev_ch->retry_io_list, retry_link) {
    1373           1 :                 if (bio == bio_to_abort) {
    1374           1 :                         TAILQ_REMOVE(&nbdev_ch->retry_io_list, bio, retry_link);
    1375           1 :                         __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), SPDK_BDEV_IO_STATUS_ABORTED, NULL);
    1376           1 :                         return 0;
    1377             :                 }
    1378           0 :         }
    1379             : 
    1380           5 :         return -ENOENT;
    1381           6 : }
    1382             : 
    1383             : static void
    1384          12 : bdev_nvme_update_nvme_error_stat(struct spdk_bdev_io *bdev_io, const struct spdk_nvme_cpl *cpl)
    1385             : {
    1386             :         struct nvme_bdev *nbdev;
    1387             :         uint16_t sct, sc;
    1388             : 
    1389          12 :         assert(spdk_nvme_cpl_is_error(cpl));
    1390             : 
    1391          12 :         nbdev = bdev_io->bdev->ctxt;
    1392             : 
    1393          12 :         if (nbdev->err_stat == NULL) {
    1394          12 :                 return;
    1395             :         }
    1396             : 
    1397           0 :         sct = cpl->status.sct;
    1398           0 :         sc = cpl->status.sc;
    1399             : 
    1400           0 :         pthread_mutex_lock(&nbdev->mutex);
    1401             : 
    1402           0 :         nbdev->err_stat->status_type[sct]++;
    1403           0 :         switch (sct) {
    1404             :         case SPDK_NVME_SCT_GENERIC:
    1405             :         case SPDK_NVME_SCT_COMMAND_SPECIFIC:
    1406             :         case SPDK_NVME_SCT_MEDIA_ERROR:
    1407             :         case SPDK_NVME_SCT_PATH:
    1408           0 :                 nbdev->err_stat->status[sct][sc]++;
    1409           0 :                 break;
    1410             :         default:
    1411           0 :                 break;
    1412             :         }
    1413             : 
    1414           0 :         pthread_mutex_unlock(&nbdev->mutex);
    1415          12 : }
    1416             : 
    1417             : static inline void
    1418          20 : bdev_nvme_update_io_path_stat(struct nvme_bdev_io *bio)
    1419             : {
    1420          20 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1421          20 :         uint64_t num_blocks = bdev_io->u.bdev.num_blocks;
    1422          20 :         uint32_t blocklen = bdev_io->bdev->blocklen;
    1423             :         struct spdk_bdev_io_stat *stat;
    1424             :         uint64_t tsc_diff;
    1425             : 
    1426          20 :         if (bio->io_path->stat == NULL) {
    1427          20 :                 return;
    1428             :         }
    1429             : 
    1430           0 :         tsc_diff = spdk_get_ticks() - bio->submit_tsc;
    1431           0 :         stat = bio->io_path->stat;
    1432             : 
    1433           0 :         switch (bdev_io->type) {
    1434             :         case SPDK_BDEV_IO_TYPE_READ:
    1435           0 :                 stat->bytes_read += num_blocks * blocklen;
    1436           0 :                 stat->num_read_ops++;
    1437           0 :                 stat->read_latency_ticks += tsc_diff;
    1438           0 :                 if (stat->max_read_latency_ticks < tsc_diff) {
    1439           0 :                         stat->max_read_latency_ticks = tsc_diff;
    1440           0 :                 }
    1441           0 :                 if (stat->min_read_latency_ticks > tsc_diff) {
    1442           0 :                         stat->min_read_latency_ticks = tsc_diff;
    1443           0 :                 }
    1444           0 :                 break;
    1445             :         case SPDK_BDEV_IO_TYPE_WRITE:
    1446           0 :                 stat->bytes_written += num_blocks * blocklen;
    1447           0 :                 stat->num_write_ops++;
    1448           0 :                 stat->write_latency_ticks += tsc_diff;
    1449           0 :                 if (stat->max_write_latency_ticks < tsc_diff) {
    1450           0 :                         stat->max_write_latency_ticks = tsc_diff;
    1451           0 :                 }
    1452           0 :                 if (stat->min_write_latency_ticks > tsc_diff) {
    1453           0 :                         stat->min_write_latency_ticks = tsc_diff;
    1454           0 :                 }
    1455           0 :                 break;
    1456             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    1457           0 :                 stat->bytes_unmapped += num_blocks * blocklen;
    1458           0 :                 stat->num_unmap_ops++;
    1459           0 :                 stat->unmap_latency_ticks += tsc_diff;
    1460           0 :                 if (stat->max_unmap_latency_ticks < tsc_diff) {
    1461           0 :                         stat->max_unmap_latency_ticks = tsc_diff;
    1462           0 :                 }
    1463           0 :                 if (stat->min_unmap_latency_ticks > tsc_diff) {
    1464           0 :                         stat->min_unmap_latency_ticks = tsc_diff;
    1465           0 :                 }
    1466           0 :                 break;
    1467             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    1468             :                 /* Track the data in the start phase only */
    1469           0 :                 if (!bdev_io->u.bdev.zcopy.start) {
    1470           0 :                         break;
    1471             :                 }
    1472           0 :                 if (bdev_io->u.bdev.zcopy.populate) {
    1473           0 :                         stat->bytes_read += num_blocks * blocklen;
    1474           0 :                         stat->num_read_ops++;
    1475           0 :                         stat->read_latency_ticks += tsc_diff;
    1476           0 :                         if (stat->max_read_latency_ticks < tsc_diff) {
    1477           0 :                                 stat->max_read_latency_ticks = tsc_diff;
    1478           0 :                         }
    1479           0 :                         if (stat->min_read_latency_ticks > tsc_diff) {
    1480           0 :                                 stat->min_read_latency_ticks = tsc_diff;
    1481           0 :                         }
    1482           0 :                 } else {
    1483           0 :                         stat->bytes_written += num_blocks * blocklen;
    1484           0 :                         stat->num_write_ops++;
    1485           0 :                         stat->write_latency_ticks += tsc_diff;
    1486           0 :                         if (stat->max_write_latency_ticks < tsc_diff) {
    1487           0 :                                 stat->max_write_latency_ticks = tsc_diff;
    1488           0 :                         }
    1489           0 :                         if (stat->min_write_latency_ticks > tsc_diff) {
    1490           0 :                                 stat->min_write_latency_ticks = tsc_diff;
    1491           0 :                         }
    1492             :                 }
    1493           0 :                 break;
    1494             :         case SPDK_BDEV_IO_TYPE_COPY:
    1495           0 :                 stat->bytes_copied += num_blocks * blocklen;
    1496           0 :                 stat->num_copy_ops++;
    1497           0 :                 stat->copy_latency_ticks += tsc_diff;
    1498           0 :                 if (stat->max_copy_latency_ticks < tsc_diff) {
    1499           0 :                         stat->max_copy_latency_ticks = tsc_diff;
    1500           0 :                 }
    1501           0 :                 if (stat->min_copy_latency_ticks > tsc_diff) {
    1502           0 :                         stat->min_copy_latency_ticks = tsc_diff;
    1503           0 :                 }
    1504           0 :                 break;
    1505             :         default:
    1506           0 :                 break;
    1507             :         }
    1508          20 : }
    1509             : 
    1510             : static bool
    1511          11 : bdev_nvme_check_retry_io(struct nvme_bdev_io *bio,
    1512             :                          const struct spdk_nvme_cpl *cpl,
    1513             :                          struct nvme_bdev_channel *nbdev_ch,
    1514             :                          uint64_t *_delay_ms)
    1515             : {
    1516          11 :         struct nvme_io_path *io_path = bio->io_path;
    1517          11 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    1518             :         const struct spdk_nvme_ctrlr_data *cdata;
    1519             : 
    1520          15 :         if (spdk_nvme_cpl_is_path_error(cpl) ||
    1521           5 :             spdk_nvme_cpl_is_aborted_sq_deletion(cpl) ||
    1522           0 :             !nvme_io_path_is_available(io_path) ||
    1523           4 :             !nvme_ctrlr_is_available(nvme_ctrlr)) {
    1524          15 :                 bdev_nvme_clear_current_io_path(nbdev_ch);
    1525          15 :                 bio->io_path = NULL;
    1526          15 :                 if (spdk_nvme_cpl_is_ana_error(cpl)) {
    1527           1 :                         if (nvme_ctrlr_read_ana_log_page(nvme_ctrlr) == 0) {
    1528           1 :                                 io_path->nvme_ns->ana_state_updating = true;
    1529           1 :                         }
    1530           1 :                 }
    1531           3 :                 if (!any_io_path_may_become_available(nbdev_ch)) {
    1532           0 :                         return false;
    1533             :                 }
    1534           3 :                 *_delay_ms = 0;
    1535           3 :         } else {
    1536           4 :                 bio->retry_count++;
    1537             : 
    1538           4 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    1539             : 
    1540           4 :                 if (cpl->status.crd != 0) {
    1541           1 :                         *_delay_ms = cdata->crdt[cpl->status.crd] * 100;
    1542           1 :                 } else {
    1543           3 :                         *_delay_ms = 0;
    1544             :                 }
    1545             :         }
    1546             : 
    1547           7 :         return true;
    1548           7 : }
    1549             : 
    1550             : static inline void
    1551          40 : bdev_nvme_io_complete_nvme_status(struct nvme_bdev_io *bio,
    1552             :                                   const struct spdk_nvme_cpl *cpl)
    1553             : {
    1554          40 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1555             :         struct nvme_bdev_channel *nbdev_ch;
    1556             :         uint64_t delay_ms;
    1557             : 
    1558          40 :         assert(!bdev_nvme_io_type_is_admin(bdev_io->type));
    1559             : 
    1560          40 :         if (spdk_likely(spdk_nvme_cpl_is_success(cpl))) {
    1561          20 :                 bdev_nvme_update_io_path_stat(bio);
    1562          20 :                 goto complete;
    1563             :         }
    1564             : 
    1565             :         /* Update error counts before deciding if retry is needed.
    1566             :          * Hence, error counts may be more than the number of I/O errors.
    1567             :          */
    1568          20 :         bdev_nvme_update_nvme_error_stat(bdev_io, cpl);
    1569             : 
    1570          27 :         if (cpl->status.dnr != 0 || spdk_nvme_cpl_is_aborted_by_request(cpl) ||
    1571           2 :             (g_opts.bdev_retry_count != -1 && bio->retry_count >= g_opts.bdev_retry_count)) {
    1572          23 :                 goto complete;
    1573             :         }
    1574             : 
    1575             :         /* At this point we don't know whether the sequence was successfully executed or not, so we
    1576             :          * cannot retry the IO */
    1577           7 :         if (bdev_io->u.bdev.accel_sequence != NULL) {
    1578           0 :                 goto complete;
    1579             :         }
    1580             : 
    1581           7 :         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    1582             : 
    1583           7 :         if (bdev_nvme_check_retry_io(bio, cpl, nbdev_ch, &delay_ms)) {
    1584           7 :                 bdev_nvme_queue_retry_io(nbdev_ch, bio, delay_ms);
    1585           7 :                 return;
    1586             :         }
    1587             : 
    1588             : complete:
    1589          25 :         bio->retry_count = 0;
    1590          25 :         bio->submit_tsc = 0;
    1591          25 :         bdev_io->u.bdev.accel_sequence = NULL;
    1592          25 :         __bdev_nvme_io_complete(bdev_io, 0, cpl);
    1593          32 : }
    1594             : 
    1595             : static inline void
    1596          13 : bdev_nvme_io_complete(struct nvme_bdev_io *bio, int rc)
    1597             : {
    1598          13 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1599             :         struct nvme_bdev_channel *nbdev_ch;
    1600             :         enum spdk_bdev_io_status io_status;
    1601             : 
    1602          13 :         assert(!bdev_nvme_io_type_is_admin(bdev_io->type));
    1603             : 
    1604          13 :         switch (rc) {
    1605             :         case 0:
    1606           1 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    1607           1 :                 break;
    1608             :         case -ENOMEM:
    1609           0 :                 io_status = SPDK_BDEV_IO_STATUS_NOMEM;
    1610           0 :                 break;
    1611             :         case -ENXIO:
    1612          15 :                 if (g_opts.bdev_retry_count == -1 || bio->retry_count < g_opts.bdev_retry_count) {
    1613          12 :                         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    1614             : 
    1615          12 :                         bdev_nvme_clear_current_io_path(nbdev_ch);
    1616          12 :                         bio->io_path = NULL;
    1617             : 
    1618          12 :                         if (any_io_path_may_become_available(nbdev_ch)) {
    1619           9 :                                 bdev_nvme_queue_retry_io(nbdev_ch, bio, 1000ULL);
    1620           9 :                                 return;
    1621             :                         }
    1622           3 :                 }
    1623             : 
    1624             :         /* fallthrough */
    1625             :         default:
    1626           3 :                 spdk_accel_sequence_abort(bdev_io->u.bdev.accel_sequence);
    1627           3 :                 bdev_io->u.bdev.accel_sequence = NULL;
    1628           3 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    1629           3 :                 break;
    1630             :         }
    1631             : 
    1632           4 :         bio->retry_count = 0;
    1633           4 :         bio->submit_tsc = 0;
    1634           4 :         __bdev_nvme_io_complete(bdev_io, io_status, NULL);
    1635          13 : }
    1636             : 
    1637             : static inline void
    1638           4 : bdev_nvme_admin_complete(struct nvme_bdev_io *bio, int rc)
    1639             : {
    1640           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1641             :         enum spdk_bdev_io_status io_status;
    1642             : 
    1643           4 :         switch (rc) {
    1644             :         case 0:
    1645           1 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    1646           1 :                 break;
    1647             :         case -ENOMEM:
    1648           0 :                 io_status = SPDK_BDEV_IO_STATUS_NOMEM;
    1649           0 :                 break;
    1650           1 :         case -ENXIO:
    1651             :         /* fallthrough */
    1652             :         default:
    1653           3 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    1654           3 :                 break;
    1655             :         }
    1656             : 
    1657           4 :         __bdev_nvme_io_complete(bdev_io, io_status, NULL);
    1658           4 : }
    1659             : 
    1660             : static void
    1661           3 : bdev_nvme_clear_io_path_caches_done(struct nvme_ctrlr *nvme_ctrlr,
    1662             :                                     void *ctx, int status)
    1663             : {
    1664           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    1665             : 
    1666           3 :         assert(nvme_ctrlr->io_path_cache_clearing == true);
    1667           3 :         nvme_ctrlr->io_path_cache_clearing = false;
    1668             : 
    1669           3 :         if (!nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    1670           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1671           3 :                 return;
    1672             :         }
    1673             : 
    1674           0 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1675             : 
    1676           0 :         nvme_ctrlr_unregister(nvme_ctrlr);
    1677           3 : }
    1678             : 
    1679             : static void
    1680         416 : _bdev_nvme_clear_io_path_cache(struct nvme_qpair *nvme_qpair)
    1681             : {
    1682             :         struct nvme_io_path *io_path;
    1683             : 
    1684         651 :         TAILQ_FOREACH(io_path, &nvme_qpair->io_path_list, tailq) {
    1685         235 :                 if (io_path->nbdev_ch == NULL) {
    1686          72 :                         continue;
    1687             :                 }
    1688         163 :                 bdev_nvme_clear_current_io_path(io_path->nbdev_ch);
    1689         163 :         }
    1690         416 : }
    1691             : 
    1692             : static void
    1693           1 : bdev_nvme_clear_io_path_cache(struct nvme_ctrlr_channel_iter *i,
    1694             :                               struct nvme_ctrlr *nvme_ctrlr,
    1695             :                               struct nvme_ctrlr_channel *ctrlr_ch,
    1696             :                               void *ctx)
    1697             : {
    1698           1 :         assert(ctrlr_ch->qpair != NULL);
    1699             : 
    1700           1 :         _bdev_nvme_clear_io_path_cache(ctrlr_ch->qpair);
    1701             : 
    1702           1 :         nvme_ctrlr_for_each_channel_continue(i, 0);
    1703           1 : }
    1704             : 
    1705             : static void
    1706           3 : bdev_nvme_clear_io_path_caches(struct nvme_ctrlr *nvme_ctrlr)
    1707             : {
    1708           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    1709           3 :         if (!nvme_ctrlr_is_available(nvme_ctrlr) ||
    1710           3 :             nvme_ctrlr->io_path_cache_clearing) {
    1711           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1712           0 :                 return;
    1713             :         }
    1714             : 
    1715           3 :         nvme_ctrlr->io_path_cache_clearing = true;
    1716           3 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1717             : 
    1718           3 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    1719             :                                     bdev_nvme_clear_io_path_cache,
    1720             :                                     NULL,
    1721             :                                     bdev_nvme_clear_io_path_caches_done);
    1722           3 : }
    1723             : 
    1724             : static struct nvme_qpair *
    1725         121 : nvme_poll_group_get_qpair(struct nvme_poll_group *group, struct spdk_nvme_qpair *qpair)
    1726             : {
    1727             :         struct nvme_qpair *nvme_qpair;
    1728             : 
    1729         138 :         TAILQ_FOREACH(nvme_qpair, &group->qpair_list, tailq) {
    1730         138 :                 if (nvme_qpair->qpair == qpair) {
    1731         121 :                         break;
    1732             :                 }
    1733          17 :         }
    1734             : 
    1735         121 :         return nvme_qpair;
    1736             : }
    1737             : 
    1738             : static void nvme_qpair_delete(struct nvme_qpair *nvme_qpair);
    1739             : 
    1740             : static void
    1741         121 : bdev_nvme_disconnected_qpair_cb(struct spdk_nvme_qpair *qpair, void *poll_group_ctx)
    1742             : {
    1743         121 :         struct nvme_poll_group *group = poll_group_ctx;
    1744             :         struct nvme_qpair *nvme_qpair;
    1745             :         struct nvme_ctrlr *nvme_ctrlr;
    1746             :         struct nvme_ctrlr_channel *ctrlr_ch;
    1747             :         int status;
    1748             : 
    1749         121 :         nvme_qpair = nvme_poll_group_get_qpair(group, qpair);
    1750         121 :         if (nvme_qpair == NULL) {
    1751           0 :                 return;
    1752             :         }
    1753             : 
    1754         121 :         if (nvme_qpair->qpair != NULL) {
    1755         121 :                 spdk_nvme_ctrlr_free_io_qpair(nvme_qpair->qpair);
    1756         121 :                 nvme_qpair->qpair = NULL;
    1757         121 :         }
    1758             : 
    1759         121 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1760             : 
    1761         121 :         nvme_ctrlr = nvme_qpair->ctrlr;
    1762         121 :         ctrlr_ch = nvme_qpair->ctrlr_ch;
    1763             : 
    1764         121 :         if (ctrlr_ch != NULL) {
    1765          74 :                 if (ctrlr_ch->reset_iter != NULL) {
    1766             :                         /* We are in a full reset sequence. */
    1767          69 :                         if (ctrlr_ch->connect_poller != NULL) {
    1768             :                                 /* qpair was failed to connect. Abort the reset sequence. */
    1769           0 :                                 NVME_CTRLR_INFOLOG(nvme_ctrlr,
    1770             :                                                    "qpair %p was failed to connect. abort the reset ctrlr sequence.\n",
    1771             :                                                    qpair);
    1772           0 :                                 spdk_poller_unregister(&ctrlr_ch->connect_poller);
    1773           0 :                                 status = -1;
    1774           0 :                         } else {
    1775             :                                 /* qpair was completed to disconnect. Just move to the next ctrlr_channel. */
    1776          69 :                                 NVME_CTRLR_INFOLOG(nvme_ctrlr,
    1777             :                                                    "qpair %p was disconnected and freed in a reset ctrlr sequence.\n",
    1778             :                                                    qpair);
    1779          69 :                                 status = 0;
    1780             :                         }
    1781          69 :                         nvme_ctrlr_for_each_channel_continue(ctrlr_ch->reset_iter, status);
    1782          69 :                         ctrlr_ch->reset_iter = NULL;
    1783          69 :                 } else {
    1784             :                         /* qpair was disconnected unexpectedly. Reset controller for recovery. */
    1785           5 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpair %p was disconnected and freed. reset controller.\n",
    1786             :                                            qpair);
    1787           5 :                         bdev_nvme_failover_ctrlr(nvme_ctrlr);
    1788             :                 }
    1789          74 :         } else {
    1790             :                 /* In this case, ctrlr_channel is already deleted. */
    1791          47 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpair %p was disconnected and freed. delete nvme_qpair.\n",
    1792             :                                    qpair);
    1793          47 :                 nvme_qpair_delete(nvme_qpair);
    1794             :         }
    1795         121 : }
    1796             : 
    1797             : static void
    1798           0 : bdev_nvme_check_io_qpairs(struct nvme_poll_group *group)
    1799             : {
    1800             :         struct nvme_qpair *nvme_qpair;
    1801             : 
    1802           0 :         TAILQ_FOREACH(nvme_qpair, &group->qpair_list, tailq) {
    1803           0 :                 if (nvme_qpair->qpair == NULL || nvme_qpair->ctrlr_ch == NULL) {
    1804           0 :                         continue;
    1805             :                 }
    1806             : 
    1807           0 :                 if (spdk_nvme_qpair_get_failure_reason(nvme_qpair->qpair) !=
    1808             :                     SPDK_NVME_QPAIR_FAILURE_NONE) {
    1809           0 :                         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1810           0 :                 }
    1811           0 :         }
    1812           0 : }
    1813             : 
    1814             : static int
    1815        1209 : bdev_nvme_poll(void *arg)
    1816             : {
    1817        1209 :         struct nvme_poll_group *group = arg;
    1818             :         int64_t num_completions;
    1819             : 
    1820        1209 :         if (group->collect_spin_stat && group->start_ticks == 0) {
    1821           0 :                 group->start_ticks = spdk_get_ticks();
    1822           0 :         }
    1823             : 
    1824        1209 :         num_completions = spdk_nvme_poll_group_process_completions(group->group, 0,
    1825             :                           bdev_nvme_disconnected_qpair_cb);
    1826        1209 :         if (group->collect_spin_stat) {
    1827           0 :                 if (num_completions > 0) {
    1828           0 :                         if (group->end_ticks != 0) {
    1829           0 :                                 group->spin_ticks += (group->end_ticks - group->start_ticks);
    1830           0 :                                 group->end_ticks = 0;
    1831           0 :                         }
    1832           0 :                         group->start_ticks = 0;
    1833           0 :                 } else {
    1834           0 :                         group->end_ticks = spdk_get_ticks();
    1835             :                 }
    1836           0 :         }
    1837             : 
    1838        1209 :         if (spdk_unlikely(num_completions < 0)) {
    1839           0 :                 bdev_nvme_check_io_qpairs(group);
    1840           0 :         }
    1841             : 
    1842        1209 :         return num_completions > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
    1843             : }
    1844             : 
    1845             : static int bdev_nvme_poll_adminq(void *arg);
    1846             : 
    1847             : static void
    1848         142 : bdev_nvme_change_adminq_poll_period(struct nvme_ctrlr *nvme_ctrlr, uint64_t new_period_us)
    1849             : {
    1850         142 :         if (spdk_interrupt_mode_is_enabled()) {
    1851           0 :                 return;
    1852             :         }
    1853             : 
    1854         142 :         spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
    1855             : 
    1856         142 :         nvme_ctrlr->adminq_timer_poller = SPDK_POLLER_REGISTER(bdev_nvme_poll_adminq,
    1857             :                                           nvme_ctrlr, new_period_us);
    1858         142 : }
    1859             : 
    1860             : static int
    1861         191 : bdev_nvme_poll_adminq(void *arg)
    1862             : {
    1863             :         int32_t rc;
    1864         191 :         struct nvme_ctrlr *nvme_ctrlr = arg;
    1865             :         nvme_ctrlr_disconnected_cb disconnected_cb;
    1866             : 
    1867         191 :         assert(nvme_ctrlr != NULL);
    1868             : 
    1869         191 :         rc = spdk_nvme_ctrlr_process_admin_completions(nvme_ctrlr->ctrlr);
    1870         191 :         if (rc < 0) {
    1871          86 :                 disconnected_cb = nvme_ctrlr->disconnected_cb;
    1872          86 :                 nvme_ctrlr->disconnected_cb = NULL;
    1873             : 
    1874          86 :                 if (disconnected_cb != NULL) {
    1875         142 :                         bdev_nvme_change_adminq_poll_period(nvme_ctrlr,
    1876          71 :                                                             g_opts.nvme_adminq_poll_period_us);
    1877          71 :                         disconnected_cb(nvme_ctrlr);
    1878          71 :                 } else {
    1879          15 :                         bdev_nvme_failover_ctrlr(nvme_ctrlr);
    1880             :                 }
    1881         191 :         } else if (spdk_nvme_ctrlr_get_admin_qp_failure_reason(nvme_ctrlr->ctrlr) !=
    1882             :                    SPDK_NVME_QPAIR_FAILURE_NONE) {
    1883           0 :                 bdev_nvme_clear_io_path_caches(nvme_ctrlr);
    1884           0 :         }
    1885             : 
    1886         191 :         return rc == 0 ? SPDK_POLLER_IDLE : SPDK_POLLER_BUSY;
    1887             : }
    1888             : 
    1889             : static void
    1890          39 : nvme_bdev_free(void *io_device)
    1891             : {
    1892          39 :         struct nvme_bdev *nvme_disk = io_device;
    1893             : 
    1894          39 :         pthread_mutex_destroy(&nvme_disk->mutex);
    1895          39 :         free(nvme_disk->disk.name);
    1896          39 :         free(nvme_disk->err_stat);
    1897          39 :         free(nvme_disk);
    1898          39 : }
    1899             : 
    1900             : static int
    1901          38 : bdev_nvme_destruct(void *ctx)
    1902             : {
    1903          38 :         struct nvme_bdev *nvme_disk = ctx;
    1904             :         struct nvme_ns *nvme_ns, *tmp_nvme_ns;
    1905             : 
    1906             :         SPDK_DTRACE_PROBE2(bdev_nvme_destruct, nvme_disk->nbdev_ctrlr->name, nvme_disk->nsid);
    1907             : 
    1908          77 :         TAILQ_FOREACH_SAFE(nvme_ns, &nvme_disk->nvme_ns_list, tailq, tmp_nvme_ns) {
    1909          39 :                 pthread_mutex_lock(&nvme_ns->ctrlr->mutex);
    1910             : 
    1911          39 :                 nvme_ns->bdev = NULL;
    1912             : 
    1913          39 :                 assert(nvme_ns->id > 0);
    1914             : 
    1915          39 :                 if (nvme_ctrlr_get_ns(nvme_ns->ctrlr, nvme_ns->id) == NULL) {
    1916           0 :                         pthread_mutex_unlock(&nvme_ns->ctrlr->mutex);
    1917             : 
    1918           0 :                         nvme_ctrlr_put_ref(nvme_ns->ctrlr);
    1919           0 :                         nvme_ns_free(nvme_ns);
    1920           0 :                 } else {
    1921          39 :                         pthread_mutex_unlock(&nvme_ns->ctrlr->mutex);
    1922             :                 }
    1923          39 :         }
    1924             : 
    1925          38 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    1926          38 :         TAILQ_REMOVE(&nvme_disk->nbdev_ctrlr->bdevs, nvme_disk, tailq);
    1927          38 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    1928             : 
    1929          38 :         spdk_io_device_unregister(nvme_disk, nvme_bdev_free);
    1930             : 
    1931          38 :         return 0;
    1932             : }
    1933             : 
    1934             : static int
    1935         122 : bdev_nvme_create_qpair(struct nvme_qpair *nvme_qpair)
    1936             : {
    1937             :         struct nvme_ctrlr *nvme_ctrlr;
    1938             :         struct spdk_nvme_io_qpair_opts opts;
    1939             :         struct spdk_nvme_qpair *qpair;
    1940             :         int rc;
    1941             : 
    1942         122 :         nvme_ctrlr = nvme_qpair->ctrlr;
    1943             : 
    1944         122 :         spdk_nvme_ctrlr_get_default_io_qpair_opts(nvme_ctrlr->ctrlr, &opts, sizeof(opts));
    1945         122 :         opts.create_only = true;
    1946             :         /* In interrupt mode qpairs must be created in sync mode, else it will never be connected.
    1947             :          * delay_cmd_submit must be false as in interrupt mode requests cannot be submitted in
    1948             :          * completion context.
    1949             :          */
    1950         122 :         if (!spdk_interrupt_mode_is_enabled()) {
    1951         122 :                 opts.async_mode = true;
    1952         122 :                 opts.delay_cmd_submit = g_opts.delay_cmd_submit;
    1953         122 :         }
    1954         122 :         opts.io_queue_requests = spdk_max(g_opts.io_queue_requests, opts.io_queue_requests);
    1955         122 :         g_opts.io_queue_requests = opts.io_queue_requests;
    1956             : 
    1957         122 :         qpair = spdk_nvme_ctrlr_alloc_io_qpair(nvme_ctrlr->ctrlr, &opts, sizeof(opts));
    1958         122 :         if (qpair == NULL) {
    1959           0 :                 return -1;
    1960             :         }
    1961             : 
    1962             :         SPDK_DTRACE_PROBE3(bdev_nvme_create_qpair, nvme_ctrlr->nbdev_ctrlr->name,
    1963             :                            spdk_nvme_qpair_get_id(qpair), spdk_thread_get_id(nvme_ctrlr->thread));
    1964             : 
    1965         122 :         assert(nvme_qpair->group != NULL);
    1966             : 
    1967         122 :         rc = spdk_nvme_poll_group_add(nvme_qpair->group->group, qpair);
    1968         122 :         if (rc != 0) {
    1969           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Unable to begin polling on NVMe Channel.\n");
    1970           0 :                 goto err;
    1971             :         }
    1972             : 
    1973         122 :         rc = spdk_nvme_ctrlr_connect_io_qpair(nvme_ctrlr->ctrlr, qpair);
    1974         122 :         if (rc != 0) {
    1975           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Unable to connect I/O qpair.\n");
    1976           0 :                 goto err;
    1977             :         }
    1978             : 
    1979         122 :         nvme_qpair->qpair = qpair;
    1980             : 
    1981         122 :         if (!g_opts.disable_auto_failback) {
    1982          85 :                 _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1983          85 :         }
    1984             : 
    1985         122 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Connecting qpair %p:%u started.\n",
    1986             :                            qpair, spdk_nvme_qpair_get_id(qpair));
    1987             : 
    1988         122 :         return 0;
    1989             : 
    1990             : err:
    1991           0 :         spdk_nvme_ctrlr_free_io_qpair(qpair);
    1992             : 
    1993           0 :         return rc;
    1994         122 : }
    1995             : 
    1996             : static void bdev_nvme_reset_io_continue(void *cb_arg, int rc);
    1997             : 
    1998             : static void
    1999          71 : bdev_nvme_complete_pending_resets(struct nvme_ctrlr *nvme_ctrlr, bool success)
    2000             : {
    2001          71 :         int rc = 0;
    2002             :         struct nvme_bdev_io *bio;
    2003             : 
    2004          71 :         if (!success) {
    2005          33 :                 rc = -1;
    2006          33 :         }
    2007             : 
    2008          83 :         while (!TAILQ_EMPTY(&nvme_ctrlr->pending_resets)) {
    2009          12 :                 bio = TAILQ_FIRST(&nvme_ctrlr->pending_resets);
    2010          12 :                 TAILQ_REMOVE(&nvme_ctrlr->pending_resets, bio, retry_link);
    2011             : 
    2012          12 :                 bdev_nvme_reset_io_continue(bio, rc);
    2013             :         }
    2014          71 : }
    2015             : 
    2016             : /* This function marks the current trid as failed by storing the current ticks
    2017             :  * and then sets the next trid to the active trid within a controller if exists.
    2018             :  *
    2019             :  * The purpose of the boolean return value is to request the caller to disconnect
    2020             :  * the current trid now to try connecting the next trid.
    2021             :  */
    2022             : static bool
    2023          62 : bdev_nvme_failover_trid(struct nvme_ctrlr *nvme_ctrlr, bool remove, bool start)
    2024             : {
    2025             :         struct nvme_path_id *path_id, *next_path;
    2026             :         int rc __attribute__((unused));
    2027             : 
    2028          62 :         path_id = TAILQ_FIRST(&nvme_ctrlr->trids);
    2029          62 :         assert(path_id);
    2030          62 :         assert(path_id == nvme_ctrlr->active_path_id);
    2031          62 :         next_path = TAILQ_NEXT(path_id, link);
    2032             : 
    2033             :         /* Update the last failed time. It means the trid is failed if its last
    2034             :          * failed time is non-zero.
    2035             :          */
    2036          62 :         path_id->last_failed_tsc = spdk_get_ticks();
    2037             : 
    2038          62 :         if (next_path == NULL) {
    2039             :                 /* There is no alternate trid within a controller. */
    2040          51 :                 return false;
    2041             :         }
    2042             : 
    2043          11 :         if (!start && nvme_ctrlr->opts.reconnect_delay_sec == 0) {
    2044             :                 /* Connect is not retried in a controller reset sequence. Connecting
    2045             :                  * the next trid will be done by the next bdev_nvme_failover_ctrlr() call.
    2046             :                  */
    2047           3 :                 return false;
    2048             :         }
    2049             : 
    2050           8 :         assert(path_id->trid.trtype != SPDK_NVME_TRANSPORT_PCIE);
    2051             : 
    2052           8 :         NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Start failover from %s:%s to %s:%s\n",
    2053             :                              path_id->trid.traddr, path_id->trid.trsvcid,
    2054             :                              next_path->trid.traddr, next_path->trid.trsvcid);
    2055             : 
    2056           8 :         spdk_nvme_ctrlr_fail(nvme_ctrlr->ctrlr);
    2057           8 :         nvme_ctrlr->active_path_id = next_path;
    2058           8 :         rc = spdk_nvme_ctrlr_set_trid(nvme_ctrlr->ctrlr, &next_path->trid);
    2059           8 :         assert(rc == 0);
    2060           8 :         TAILQ_REMOVE(&nvme_ctrlr->trids, path_id, link);
    2061           8 :         if (!remove) {
    2062             :                 /** Shuffle the old trid to the end of the list and use the new one.
    2063             :                  * Allows for round robin through multiple connections.
    2064             :                  */
    2065           6 :                 TAILQ_INSERT_TAIL(&nvme_ctrlr->trids, path_id, link);
    2066           6 :         } else {
    2067           2 :                 free(path_id);
    2068             :         }
    2069             : 
    2070           8 :         if (start || next_path->last_failed_tsc == 0) {
    2071             :                 /* bdev_nvme_failover_ctrlr() is just called or the next trid is not failed
    2072             :                  * or used yet. Try the next trid now.
    2073             :                  */
    2074           7 :                 return true;
    2075             :         }
    2076             : 
    2077           2 :         if (spdk_get_ticks() > next_path->last_failed_tsc + spdk_get_ticks_hz() *
    2078           1 :             nvme_ctrlr->opts.reconnect_delay_sec) {
    2079             :                 /* Enough backoff passed since the next trid failed. Try the next trid now. */
    2080           0 :                 return true;
    2081             :         }
    2082             : 
    2083             :         /* The next trid will be tried after reconnect_delay_sec seconds. */
    2084           1 :         return false;
    2085          62 : }
    2086             : 
    2087             : static bool
    2088          89 : bdev_nvme_check_ctrlr_loss_timeout(struct nvme_ctrlr *nvme_ctrlr)
    2089             : {
    2090             :         int32_t elapsed;
    2091             : 
    2092          89 :         if (nvme_ctrlr->opts.ctrlr_loss_timeout_sec == 0 ||
    2093          37 :             nvme_ctrlr->opts.ctrlr_loss_timeout_sec == -1) {
    2094          63 :                 return false;
    2095             :         }
    2096             : 
    2097          26 :         elapsed = (spdk_get_ticks() - nvme_ctrlr->reset_start_tsc) / spdk_get_ticks_hz();
    2098          26 :         if (elapsed >= nvme_ctrlr->opts.ctrlr_loss_timeout_sec) {
    2099           6 :                 return true;
    2100             :         } else {
    2101          20 :                 return false;
    2102             :         }
    2103          89 : }
    2104             : 
    2105             : static bool
    2106          12 : bdev_nvme_check_fast_io_fail_timeout(struct nvme_ctrlr *nvme_ctrlr)
    2107             : {
    2108             :         uint32_t elapsed;
    2109             : 
    2110          12 :         if (nvme_ctrlr->opts.fast_io_fail_timeout_sec == 0) {
    2111           8 :                 return false;
    2112             :         }
    2113             : 
    2114           4 :         elapsed = (spdk_get_ticks() - nvme_ctrlr->reset_start_tsc) / spdk_get_ticks_hz();
    2115           4 :         if (elapsed >= nvme_ctrlr->opts.fast_io_fail_timeout_sec) {
    2116           2 :                 return true;
    2117             :         } else {
    2118           2 :                 return false;
    2119             :         }
    2120          12 : }
    2121             : 
    2122             : static void bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, bool success);
    2123             : 
    2124             : static void
    2125          72 : nvme_ctrlr_disconnect(struct nvme_ctrlr *nvme_ctrlr, nvme_ctrlr_disconnected_cb cb_fn)
    2126             : {
    2127             :         int rc;
    2128             : 
    2129          72 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start disconnecting ctrlr.\n");
    2130             : 
    2131          72 :         rc = spdk_nvme_ctrlr_disconnect(nvme_ctrlr->ctrlr);
    2132          72 :         if (rc != 0) {
    2133           1 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr, "disconnecting ctrlr failed.\n");
    2134             : 
    2135             :                 /* Disconnect fails if ctrlr is already resetting or removed. In this case,
    2136             :                  * fail the reset sequence immediately.
    2137             :                  */
    2138           1 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2139           1 :                 return;
    2140             :         }
    2141             : 
    2142             :         /* spdk_nvme_ctrlr_disconnect() may complete asynchronously later by polling adminq.
    2143             :          * Set callback here to execute the specified operation after ctrlr is really disconnected.
    2144             :          */
    2145          71 :         assert(nvme_ctrlr->disconnected_cb == NULL);
    2146          71 :         nvme_ctrlr->disconnected_cb = cb_fn;
    2147             : 
    2148             :         /* During disconnection, reduce the period to poll adminq more often. */
    2149          71 :         bdev_nvme_change_adminq_poll_period(nvme_ctrlr, 0);
    2150          72 : }
    2151             : 
    2152             : enum bdev_nvme_op_after_reset {
    2153             :         OP_NONE,
    2154             :         OP_COMPLETE_PENDING_DESTRUCT,
    2155             :         OP_DESTRUCT,
    2156             :         OP_DELAYED_RECONNECT,
    2157             :         OP_FAILOVER,
    2158             : };
    2159             : 
    2160             : typedef enum bdev_nvme_op_after_reset _bdev_nvme_op_after_reset;
    2161             : 
    2162             : static _bdev_nvme_op_after_reset
    2163          71 : bdev_nvme_check_op_after_reset(struct nvme_ctrlr *nvme_ctrlr, bool success)
    2164             : {
    2165          71 :         if (nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    2166             :                 /* Complete pending destruct after reset completes. */
    2167           0 :                 return OP_COMPLETE_PENDING_DESTRUCT;
    2168          71 :         } else if (nvme_ctrlr->pending_failover) {
    2169           3 :                 nvme_ctrlr->pending_failover = false;
    2170           3 :                 nvme_ctrlr->reset_start_tsc = 0;
    2171           3 :                 return OP_FAILOVER;
    2172          68 :         } else if (success || nvme_ctrlr->opts.reconnect_delay_sec == 0) {
    2173          54 :                 nvme_ctrlr->reset_start_tsc = 0;
    2174          54 :                 return OP_NONE;
    2175          14 :         } else if (bdev_nvme_check_ctrlr_loss_timeout(nvme_ctrlr)) {
    2176           2 :                 return OP_DESTRUCT;
    2177             :         } else {
    2178          12 :                 if (bdev_nvme_check_fast_io_fail_timeout(nvme_ctrlr)) {
    2179           2 :                         nvme_ctrlr->fast_io_fail_timedout = true;
    2180           2 :                 }
    2181          12 :                 return OP_DELAYED_RECONNECT;
    2182             :         }
    2183          71 : }
    2184             : 
    2185             : static int bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug);
    2186             : static void bdev_nvme_reconnect_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
    2187             : 
    2188             : static int
    2189           9 : bdev_nvme_reconnect_delay_timer_expired(void *ctx)
    2190             : {
    2191           9 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2192             : 
    2193             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reconnect_delay, nvme_ctrlr->nbdev_ctrlr->name);
    2194           9 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2195             : 
    2196           9 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2197             : 
    2198           9 :         if (!nvme_ctrlr->reconnect_is_delayed) {
    2199           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2200           0 :                 return SPDK_POLLER_BUSY;
    2201             :         }
    2202             : 
    2203           9 :         nvme_ctrlr->reconnect_is_delayed = false;
    2204             : 
    2205           9 :         if (nvme_ctrlr->destruct) {
    2206           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2207           0 :                 return SPDK_POLLER_BUSY;
    2208             :         }
    2209             : 
    2210           9 :         assert(nvme_ctrlr->resetting == false);
    2211           9 :         nvme_ctrlr->resetting = true;
    2212             : 
    2213           9 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2214             : 
    2215           9 :         spdk_poller_resume(nvme_ctrlr->adminq_timer_poller);
    2216             : 
    2217           9 :         bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2218           9 :         return SPDK_POLLER_BUSY;
    2219           9 : }
    2220             : 
    2221             : static void
    2222          12 : bdev_nvme_start_reconnect_delay_timer(struct nvme_ctrlr *nvme_ctrlr)
    2223             : {
    2224          12 :         spdk_poller_pause(nvme_ctrlr->adminq_timer_poller);
    2225             : 
    2226          12 :         assert(nvme_ctrlr->reconnect_is_delayed == false);
    2227          12 :         nvme_ctrlr->reconnect_is_delayed = true;
    2228             : 
    2229          12 :         assert(nvme_ctrlr->reconnect_delay_timer == NULL);
    2230          12 :         nvme_ctrlr->reconnect_delay_timer = SPDK_POLLER_REGISTER(bdev_nvme_reconnect_delay_timer_expired,
    2231             :                                             nvme_ctrlr,
    2232             :                                             nvme_ctrlr->opts.reconnect_delay_sec * SPDK_SEC_TO_USEC);
    2233          12 : }
    2234             : 
    2235             : static void remove_discovery_entry(struct nvme_ctrlr *nvme_ctrlr);
    2236             : 
    2237             : static void
    2238          71 : bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, bool success)
    2239             : {
    2240          71 :         bdev_nvme_ctrlr_op_cb ctrlr_op_cb_fn = nvme_ctrlr->ctrlr_op_cb_fn;
    2241          71 :         void *ctrlr_op_cb_arg = nvme_ctrlr->ctrlr_op_cb_arg;
    2242             :         enum bdev_nvme_op_after_reset op_after_reset;
    2243             : 
    2244          71 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2245             : 
    2246          71 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2247          71 :         if (!success) {
    2248             :                 /* Connecting the active trid failed. Set the next alternate trid to the
    2249             :                  * active trid if it exists.
    2250             :                  */
    2251          35 :                 if (bdev_nvme_failover_trid(nvme_ctrlr, false, false)) {
    2252             :                         /* The next alternate trid exists and is ready to try. Try it now. */
    2253           2 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2254             : 
    2255           2 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Try the next alternate trid %s:%s now.\n",
    2256             :                                            nvme_ctrlr->active_path_id->trid.traddr,
    2257             :                                            nvme_ctrlr->active_path_id->trid.trsvcid);
    2258             : 
    2259           2 :                         nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reconnect_ctrlr);
    2260           2 :                         return;
    2261             :                 }
    2262             : 
    2263             :                 /* We came here if there is no alternate trid or if the next trid exists but
    2264             :                  * is not ready to try. We will try the active trid after reconnect_delay_sec
    2265             :                  * seconds if it is non-zero or at the next reset call otherwise.
    2266             :                  */
    2267          33 :         } else {
    2268             :                 /* Connecting the active trid succeeded. Clear the last failed time because it
    2269             :                  * means the trid is failed if its last failed time is non-zero.
    2270             :                  */
    2271          36 :                 nvme_ctrlr->active_path_id->last_failed_tsc = 0;
    2272             :         }
    2273             : 
    2274          69 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Clear pending resets.\n");
    2275             : 
    2276             :         /* Make sure we clear any pending resets before returning. */
    2277          69 :         bdev_nvme_complete_pending_resets(nvme_ctrlr, success);
    2278             : 
    2279          69 :         if (!success) {
    2280          33 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Resetting controller failed.\n");
    2281          33 :         } else {
    2282          36 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Resetting controller successful.\n");
    2283             :         }
    2284             : 
    2285          69 :         nvme_ctrlr->resetting = false;
    2286          69 :         nvme_ctrlr->dont_retry = false;
    2287          69 :         nvme_ctrlr->in_failover = false;
    2288             : 
    2289          69 :         nvme_ctrlr->ctrlr_op_cb_fn = NULL;
    2290          69 :         nvme_ctrlr->ctrlr_op_cb_arg = NULL;
    2291             : 
    2292          69 :         op_after_reset = bdev_nvme_check_op_after_reset(nvme_ctrlr, success);
    2293          69 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2294             : 
    2295             :         /* Delay callbacks when the next operation is a failover. */
    2296          69 :         if (ctrlr_op_cb_fn && op_after_reset != OP_FAILOVER) {
    2297          17 :                 ctrlr_op_cb_fn(ctrlr_op_cb_arg, success ? 0 : -1);
    2298          17 :         }
    2299             : 
    2300          69 :         switch (op_after_reset) {
    2301             :         case OP_COMPLETE_PENDING_DESTRUCT:
    2302           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    2303           0 :                 break;
    2304             :         case OP_DESTRUCT:
    2305           2 :                 bdev_nvme_delete_ctrlr(nvme_ctrlr, false);
    2306           2 :                 remove_discovery_entry(nvme_ctrlr);
    2307           2 :                 break;
    2308             :         case OP_DELAYED_RECONNECT:
    2309          12 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_start_reconnect_delay_timer);
    2310          12 :                 break;
    2311             :         case OP_FAILOVER:
    2312           3 :                 nvme_ctrlr->ctrlr_op_cb_fn = ctrlr_op_cb_fn;
    2313           3 :                 nvme_ctrlr->ctrlr_op_cb_arg = ctrlr_op_cb_arg;
    2314           3 :                 bdev_nvme_failover_ctrlr(nvme_ctrlr);
    2315           3 :                 break;
    2316             :         default:
    2317          52 :                 break;
    2318             :         }
    2319          71 : }
    2320             : 
    2321             : static void
    2322           0 : bdev_nvme_reset_create_qpairs_failed(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2323             : {
    2324           0 :         bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2325           0 : }
    2326             : 
    2327             : static void
    2328         104 : bdev_nvme_reset_destroy_qpair(struct nvme_ctrlr_channel_iter *i,
    2329             :                               struct nvme_ctrlr *nvme_ctrlr,
    2330             :                               struct nvme_ctrlr_channel *ctrlr_ch, void *ctx)
    2331             : {
    2332             :         struct nvme_qpair *nvme_qpair;
    2333             :         struct spdk_nvme_qpair *qpair;
    2334             : 
    2335         104 :         nvme_qpair = ctrlr_ch->qpair;
    2336         104 :         assert(nvme_qpair != NULL);
    2337             : 
    2338         104 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    2339             : 
    2340         104 :         qpair = nvme_qpair->qpair;
    2341         104 :         if (qpair != NULL) {
    2342          69 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start disconnecting qpair %p:%u.\n",
    2343             :                                    qpair, spdk_nvme_qpair_get_id(qpair));
    2344             : 
    2345          69 :                 if (nvme_qpair->ctrlr->dont_retry) {
    2346          53 :                         spdk_nvme_qpair_set_abort_dnr(qpair, true);
    2347          53 :                 }
    2348          69 :                 spdk_nvme_ctrlr_disconnect_io_qpair(qpair);
    2349             : 
    2350             :                 /* The current full reset sequence will move to the next
    2351             :                  * ctrlr_channel after the qpair is actually disconnected.
    2352             :                  */
    2353          69 :                 assert(ctrlr_ch->reset_iter == NULL);
    2354          69 :                 ctrlr_ch->reset_iter = i;
    2355          69 :         } else {
    2356          35 :                 nvme_ctrlr_for_each_channel_continue(i, 0);
    2357             :         }
    2358         104 : }
    2359             : 
    2360             : static void
    2361          36 : bdev_nvme_reset_create_qpairs_done(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2362             : {
    2363          36 :         if (status == 0) {
    2364          36 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpairs were created after ctrlr reset.\n");
    2365             : 
    2366          36 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, true);
    2367          36 :         } else {
    2368           0 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpairs were failed to create after ctrlr reset.\n");
    2369             : 
    2370             :                 /* Delete the added qpairs and quiesce ctrlr to make the states clean. */
    2371           0 :                 nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2372             :                                             bdev_nvme_reset_destroy_qpair,
    2373             :                                             NULL,
    2374             :                                             bdev_nvme_reset_create_qpairs_failed);
    2375             :         }
    2376          36 : }
    2377             : 
    2378             : static int
    2379          61 : bdev_nvme_reset_check_qpair_connected(void *ctx)
    2380             : {
    2381          61 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx;
    2382          61 :         struct nvme_qpair *nvme_qpair = ctrlr_ch->qpair;
    2383             :         struct spdk_nvme_qpair *qpair;
    2384             : 
    2385          61 :         if (ctrlr_ch->reset_iter == NULL) {
    2386             :                 /* qpair was already failed to connect and the reset sequence is being aborted. */
    2387           0 :                 assert(ctrlr_ch->connect_poller == NULL);
    2388           0 :                 assert(nvme_qpair->qpair == NULL);
    2389             : 
    2390           0 :                 NVME_CTRLR_INFOLOG(nvme_qpair->ctrlr,
    2391             :                                    "qpair was already failed to connect. reset is being aborted.\n");
    2392           0 :                 return SPDK_POLLER_BUSY;
    2393             :         }
    2394             : 
    2395          61 :         qpair = nvme_qpair->qpair;
    2396          61 :         assert(qpair != NULL);
    2397             : 
    2398          61 :         if (!spdk_nvme_qpair_is_connected(qpair)) {
    2399           0 :                 return SPDK_POLLER_BUSY;
    2400             :         }
    2401             : 
    2402          61 :         NVME_CTRLR_INFOLOG(nvme_qpair->ctrlr, "qpair %p:%u was connected.\n",
    2403             :                            qpair, spdk_nvme_qpair_get_id(qpair));
    2404             : 
    2405          61 :         spdk_poller_unregister(&ctrlr_ch->connect_poller);
    2406             : 
    2407             :         /* qpair was completed to connect. Move to the next ctrlr_channel */
    2408          61 :         nvme_ctrlr_for_each_channel_continue(ctrlr_ch->reset_iter, 0);
    2409          61 :         ctrlr_ch->reset_iter = NULL;
    2410             : 
    2411          61 :         if (!g_opts.disable_auto_failback) {
    2412          44 :                 _bdev_nvme_clear_io_path_cache(nvme_qpair);
    2413          44 :         }
    2414             : 
    2415          61 :         return SPDK_POLLER_BUSY;
    2416          61 : }
    2417             : 
    2418             : static void
    2419          61 : bdev_nvme_reset_create_qpair(struct nvme_ctrlr_channel_iter *i,
    2420             :                              struct nvme_ctrlr *nvme_ctrlr,
    2421             :                              struct nvme_ctrlr_channel *ctrlr_ch,
    2422             :                              void *ctx)
    2423             : {
    2424          61 :         struct nvme_qpair *nvme_qpair = ctrlr_ch->qpair;
    2425             :         struct spdk_nvme_qpair *qpair;
    2426          61 :         int rc = 0;
    2427             : 
    2428          61 :         if (nvme_qpair->qpair == NULL) {
    2429          61 :                 rc = bdev_nvme_create_qpair(nvme_qpair);
    2430          61 :         }
    2431          61 :         if (rc == 0) {
    2432          61 :                 ctrlr_ch->connect_poller = SPDK_POLLER_REGISTER(bdev_nvme_reset_check_qpair_connected,
    2433             :                                            ctrlr_ch, 0);
    2434             : 
    2435          61 :                 qpair = nvme_qpair->qpair;
    2436             : 
    2437          61 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start checking qpair %p:%u to be connected.\n",
    2438             :                                    qpair, spdk_nvme_qpair_get_id(qpair));
    2439             : 
    2440             :                 /* The current full reset sequence will move to the next
    2441             :                  * ctrlr_channel after the qpair is actually connected.
    2442             :                  */
    2443          61 :                 assert(ctrlr_ch->reset_iter == NULL);
    2444          61 :                 ctrlr_ch->reset_iter = i;
    2445          61 :         } else {
    2446           0 :                 nvme_ctrlr_for_each_channel_continue(i, rc);
    2447             :         }
    2448          61 : }
    2449             : 
    2450             : static void
    2451          36 : nvme_ctrlr_check_namespaces(struct nvme_ctrlr *nvme_ctrlr)
    2452             : {
    2453          36 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    2454             :         struct nvme_ns *nvme_ns;
    2455             : 
    2456          57 :         for (nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    2457          57 :              nvme_ns != NULL;
    2458          21 :              nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns)) {
    2459          21 :                 if (!spdk_nvme_ctrlr_is_active_ns(ctrlr, nvme_ns->id)) {
    2460           1 :                         SPDK_DEBUGLOG(bdev_nvme, "NSID %u was removed during reset.\n", nvme_ns->id);
    2461             :                         /* NS can be added again. Just nullify nvme_ns->ns. */
    2462           1 :                         nvme_ns->ns = NULL;
    2463           1 :                 }
    2464          21 :         }
    2465          36 : }
    2466             : 
    2467             : 
    2468             : static int
    2469          70 : bdev_nvme_reconnect_ctrlr_poll(void *arg)
    2470             : {
    2471          70 :         struct nvme_ctrlr *nvme_ctrlr = arg;
    2472             :         struct spdk_nvme_transport_id *trid;
    2473          70 :         int rc = -ETIMEDOUT;
    2474             : 
    2475          70 :         if (bdev_nvme_check_ctrlr_loss_timeout(nvme_ctrlr)) {
    2476             :                 /* Mark the ctrlr as failed. The next call to
    2477             :                  * spdk_nvme_ctrlr_reconnect_poll_async() will then
    2478             :                  * do the necessary cleanup and return failure.
    2479             :                  */
    2480           2 :                 spdk_nvme_ctrlr_fail(nvme_ctrlr->ctrlr);
    2481           2 :         }
    2482             : 
    2483          70 :         rc = spdk_nvme_ctrlr_reconnect_poll_async(nvme_ctrlr->ctrlr);
    2484          70 :         if (rc == -EAGAIN) {
    2485           0 :                 return SPDK_POLLER_BUSY;
    2486             :         }
    2487             : 
    2488          70 :         spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
    2489          70 :         if (rc == 0) {
    2490          36 :                 trid = &nvme_ctrlr->active_path_id->trid;
    2491             : 
    2492          36 :                 if (spdk_nvme_trtype_is_fabrics(trid->trtype)) {
    2493          36 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was connected to %s:%s. Create qpairs.\n",
    2494             :                                            trid->traddr, trid->trsvcid);
    2495          36 :                 } else {
    2496           0 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was connected. Create qpairs.\n");
    2497             :                 }
    2498             : 
    2499          36 :                 nvme_ctrlr_check_namespaces(nvme_ctrlr);
    2500             : 
    2501             :                 /* Recreate all of the I/O queue pairs */
    2502          36 :                 nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2503             :                                             bdev_nvme_reset_create_qpair,
    2504             :                                             NULL,
    2505             :                                             bdev_nvme_reset_create_qpairs_done);
    2506          36 :         } else {
    2507          34 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr could not be connected.\n");
    2508             : 
    2509          34 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2510             :         }
    2511          70 :         return SPDK_POLLER_BUSY;
    2512          70 : }
    2513             : 
    2514             : static void
    2515          70 : bdev_nvme_reconnect_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2516             : {
    2517          70 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start reconnecting ctrlr.\n");
    2518             : 
    2519          70 :         spdk_nvme_ctrlr_reconnect_async(nvme_ctrlr->ctrlr);
    2520             : 
    2521             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reconnect, nvme_ctrlr->nbdev_ctrlr->name);
    2522          70 :         assert(nvme_ctrlr->reset_detach_poller == NULL);
    2523          70 :         nvme_ctrlr->reset_detach_poller = SPDK_POLLER_REGISTER(bdev_nvme_reconnect_ctrlr_poll,
    2524             :                                           nvme_ctrlr, 0);
    2525          70 : }
    2526             : 
    2527             : static void
    2528          57 : bdev_nvme_reset_destroy_qpair_done(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2529             : {
    2530             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reset, nvme_ctrlr->nbdev_ctrlr->name);
    2531          57 :         assert(status == 0);
    2532             : 
    2533          57 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpairs were deleted.\n");
    2534             : 
    2535          57 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2536           0 :                 bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2537           0 :         } else {
    2538          57 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reconnect_ctrlr);
    2539             :         }
    2540          57 : }
    2541             : 
    2542             : static void
    2543          57 : bdev_nvme_reset_destroy_qpairs(struct nvme_ctrlr *nvme_ctrlr)
    2544             : {
    2545          57 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Delete qpairs for reset.\n");
    2546             : 
    2547          57 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2548             :                                     bdev_nvme_reset_destroy_qpair,
    2549             :                                     NULL,
    2550             :                                     bdev_nvme_reset_destroy_qpair_done);
    2551          57 : }
    2552             : 
    2553             : static void
    2554           3 : bdev_nvme_reconnect_ctrlr_now(void *ctx)
    2555             : {
    2556           3 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2557             : 
    2558           3 :         assert(nvme_ctrlr->resetting == true);
    2559           3 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2560             : 
    2561           3 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2562             : 
    2563           3 :         spdk_poller_resume(nvme_ctrlr->adminq_timer_poller);
    2564             : 
    2565           3 :         bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2566           3 : }
    2567             : 
    2568             : static void
    2569          57 : _bdev_nvme_reset_ctrlr(void *ctx)
    2570             : {
    2571          57 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2572             : 
    2573          57 :         assert(nvme_ctrlr->resetting == true);
    2574          57 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2575             : 
    2576          57 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2577           0 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reset_destroy_qpairs);
    2578           0 :         } else {
    2579          57 :                 bdev_nvme_reset_destroy_qpairs(nvme_ctrlr);
    2580             :         }
    2581          57 : }
    2582             : 
    2583             : static int
    2584          50 : bdev_nvme_reset_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, spdk_msg_fn *msg_fn)
    2585             : {
    2586          50 :         if (nvme_ctrlr->destruct) {
    2587           3 :                 return -ENXIO;
    2588             :         }
    2589             : 
    2590          47 :         if (nvme_ctrlr->resetting) {
    2591          14 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Unable to perform reset, already in progress.\n");
    2592          14 :                 return -EBUSY;
    2593             :         }
    2594             : 
    2595          33 :         if (nvme_ctrlr->disabled) {
    2596           1 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Unable to perform reset. Controller is disabled.\n");
    2597           1 :                 return -EALREADY;
    2598             :         }
    2599             : 
    2600          32 :         nvme_ctrlr->resetting = true;
    2601          32 :         nvme_ctrlr->dont_retry = true;
    2602             : 
    2603          32 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2604           1 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "Reconnect is already scheduled.\n");
    2605           1 :                 *msg_fn = bdev_nvme_reconnect_ctrlr_now;
    2606           1 :                 nvme_ctrlr->reconnect_is_delayed = false;
    2607           1 :         } else {
    2608          31 :                 *msg_fn = _bdev_nvme_reset_ctrlr;
    2609          31 :                 assert(nvme_ctrlr->reset_start_tsc == 0);
    2610             :         }
    2611             : 
    2612          32 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2613             : 
    2614          32 :         return 0;
    2615          50 : }
    2616             : 
    2617             : static int
    2618          24 : bdev_nvme_reset_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2619             : {
    2620             :         spdk_msg_fn msg_fn;
    2621             :         int rc;
    2622             : 
    2623          24 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2624          24 :         rc = bdev_nvme_reset_ctrlr_unsafe(nvme_ctrlr, &msg_fn);
    2625          24 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2626             : 
    2627          24 :         if (rc == 0) {
    2628          19 :                 spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    2629          19 :         }
    2630             : 
    2631          24 :         return rc;
    2632             : }
    2633             : 
    2634             : static int
    2635           3 : bdev_nvme_enable_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2636             : {
    2637           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2638           3 :         if (nvme_ctrlr->destruct) {
    2639           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2640           0 :                 return -ENXIO;
    2641             :         }
    2642             : 
    2643           3 :         if (nvme_ctrlr->resetting) {
    2644           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2645           0 :                 return -EBUSY;
    2646             :         }
    2647             : 
    2648           3 :         if (!nvme_ctrlr->disabled) {
    2649           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2650           1 :                 return -EALREADY;
    2651             :         }
    2652             : 
    2653           2 :         nvme_ctrlr->disabled = false;
    2654           2 :         nvme_ctrlr->resetting = true;
    2655             : 
    2656           2 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2657             : 
    2658           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2659             : 
    2660           2 :         spdk_thread_send_msg(nvme_ctrlr->thread, bdev_nvme_reconnect_ctrlr_now, nvme_ctrlr);
    2661           2 :         return 0;
    2662           3 : }
    2663             : 
    2664             : static void
    2665           2 : bdev_nvme_disable_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr)
    2666             : {
    2667           2 :         bdev_nvme_ctrlr_op_cb ctrlr_op_cb_fn = nvme_ctrlr->ctrlr_op_cb_fn;
    2668           2 :         void *ctrlr_op_cb_arg = nvme_ctrlr->ctrlr_op_cb_arg;
    2669             :         enum bdev_nvme_op_after_reset op_after_disable;
    2670             : 
    2671           2 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2672             : 
    2673           2 :         nvme_ctrlr->ctrlr_op_cb_fn = NULL;
    2674           2 :         nvme_ctrlr->ctrlr_op_cb_arg = NULL;
    2675             : 
    2676           2 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2677             : 
    2678           2 :         nvme_ctrlr->resetting = false;
    2679           2 :         nvme_ctrlr->dont_retry = false;
    2680             : 
    2681           2 :         op_after_disable = bdev_nvme_check_op_after_reset(nvme_ctrlr, true);
    2682             : 
    2683           2 :         nvme_ctrlr->disabled = true;
    2684           2 :         spdk_poller_pause(nvme_ctrlr->adminq_timer_poller);
    2685             : 
    2686             :         /* Make sure we clear any pending resets before returning. */
    2687           2 :         bdev_nvme_complete_pending_resets(nvme_ctrlr, true);
    2688             : 
    2689           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2690             : 
    2691           2 :         if (ctrlr_op_cb_fn) {
    2692           0 :                 ctrlr_op_cb_fn(ctrlr_op_cb_arg, 0);
    2693           0 :         }
    2694             : 
    2695           2 :         switch (op_after_disable) {
    2696             :         case OP_COMPLETE_PENDING_DESTRUCT:
    2697           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    2698           0 :                 break;
    2699             :         default:
    2700           2 :                 break;
    2701             :         }
    2702           2 : }
    2703             : 
    2704             : static void
    2705           1 : bdev_nvme_disable_destroy_qpairs_done(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2706             : {
    2707           1 :         assert(status == 0);
    2708             : 
    2709           1 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2710           0 :                 bdev_nvme_disable_ctrlr_complete(nvme_ctrlr);
    2711           0 :         } else {
    2712           1 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_disable_ctrlr_complete);
    2713             :         }
    2714           1 : }
    2715             : 
    2716             : static void
    2717           1 : bdev_nvme_disable_destroy_qpairs(struct nvme_ctrlr *nvme_ctrlr)
    2718             : {
    2719           1 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2720             :                                     bdev_nvme_reset_destroy_qpair,
    2721             :                                     NULL,
    2722             :                                     bdev_nvme_disable_destroy_qpairs_done);
    2723           1 : }
    2724             : 
    2725             : static void
    2726           1 : _bdev_nvme_cancel_reconnect_and_disable_ctrlr(void *ctx)
    2727             : {
    2728           1 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2729             : 
    2730           1 :         assert(nvme_ctrlr->resetting == true);
    2731           1 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2732             : 
    2733           1 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2734             : 
    2735           1 :         bdev_nvme_disable_ctrlr_complete(nvme_ctrlr);
    2736           1 : }
    2737             : 
    2738             : static void
    2739           1 : _bdev_nvme_disconnect_and_disable_ctrlr(void *ctx)
    2740             : {
    2741           1 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2742             : 
    2743           1 :         assert(nvme_ctrlr->resetting == true);
    2744           1 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2745             : 
    2746           1 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2747           0 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_disable_destroy_qpairs);
    2748           0 :         } else {
    2749           1 :                 bdev_nvme_disable_destroy_qpairs(nvme_ctrlr);
    2750             :         }
    2751           1 : }
    2752             : 
    2753             : static int
    2754           5 : bdev_nvme_disable_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2755             : {
    2756             :         spdk_msg_fn msg_fn;
    2757             : 
    2758           5 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2759           5 :         if (nvme_ctrlr->destruct) {
    2760           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2761           1 :                 return -ENXIO;
    2762             :         }
    2763             : 
    2764           4 :         if (nvme_ctrlr->resetting) {
    2765           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2766           1 :                 return -EBUSY;
    2767             :         }
    2768             : 
    2769           3 :         if (nvme_ctrlr->disabled) {
    2770           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2771           1 :                 return -EALREADY;
    2772             :         }
    2773             : 
    2774           2 :         nvme_ctrlr->resetting = true;
    2775           2 :         nvme_ctrlr->dont_retry = true;
    2776             : 
    2777           2 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2778           1 :                 msg_fn = _bdev_nvme_cancel_reconnect_and_disable_ctrlr;
    2779           1 :                 nvme_ctrlr->reconnect_is_delayed = false;
    2780           1 :         } else {
    2781           1 :                 msg_fn = _bdev_nvme_disconnect_and_disable_ctrlr;
    2782             :         }
    2783             : 
    2784           2 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2785             : 
    2786           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2787             : 
    2788           2 :         spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    2789           2 :         return 0;
    2790           5 : }
    2791             : 
    2792             : static int
    2793           6 : nvme_ctrlr_op(struct nvme_ctrlr *nvme_ctrlr, enum nvme_ctrlr_op op,
    2794             :               bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2795             : {
    2796             :         int rc;
    2797             : 
    2798           6 :         switch (op) {
    2799             :         case NVME_CTRLR_OP_RESET:
    2800           5 :                 rc = bdev_nvme_reset_ctrlr(nvme_ctrlr);
    2801           5 :                 break;
    2802             :         case NVME_CTRLR_OP_ENABLE:
    2803           0 :                 rc = bdev_nvme_enable_ctrlr(nvme_ctrlr);
    2804           0 :                 break;
    2805             :         case NVME_CTRLR_OP_DISABLE:
    2806           0 :                 rc = bdev_nvme_disable_ctrlr(nvme_ctrlr);
    2807           0 :                 break;
    2808             :         default:
    2809           1 :                 rc = -EINVAL;
    2810           1 :                 break;
    2811             :         }
    2812             : 
    2813           6 :         if (rc == 0) {
    2814           3 :                 assert(nvme_ctrlr->ctrlr_op_cb_fn == NULL);
    2815           3 :                 assert(nvme_ctrlr->ctrlr_op_cb_arg == NULL);
    2816           3 :                 nvme_ctrlr->ctrlr_op_cb_fn = cb_fn;
    2817           3 :                 nvme_ctrlr->ctrlr_op_cb_arg = cb_arg;
    2818           3 :         }
    2819           6 :         return rc;
    2820             : }
    2821             : 
    2822             : struct nvme_ctrlr_op_rpc_ctx {
    2823             :         struct nvme_ctrlr *nvme_ctrlr;
    2824             :         struct spdk_thread *orig_thread;
    2825             :         enum nvme_ctrlr_op op;
    2826             :         int rc;
    2827             :         bdev_nvme_ctrlr_op_cb cb_fn;
    2828             :         void *cb_arg;
    2829             : };
    2830             : 
    2831             : static void
    2832           4 : _nvme_ctrlr_op_rpc_complete(void *_ctx)
    2833             : {
    2834           4 :         struct nvme_ctrlr_op_rpc_ctx *ctx = _ctx;
    2835             : 
    2836           4 :         assert(ctx != NULL);
    2837           4 :         assert(ctx->cb_fn != NULL);
    2838             : 
    2839           4 :         ctx->cb_fn(ctx->cb_arg, ctx->rc);
    2840             : 
    2841           4 :         free(ctx);
    2842           4 : }
    2843             : 
    2844             : static void
    2845           4 : nvme_ctrlr_op_rpc_complete(void *cb_arg, int rc)
    2846             : {
    2847           4 :         struct nvme_ctrlr_op_rpc_ctx *ctx = cb_arg;
    2848             : 
    2849           4 :         ctx->rc = rc;
    2850             : 
    2851           4 :         spdk_thread_send_msg(ctx->orig_thread, _nvme_ctrlr_op_rpc_complete, ctx);
    2852           4 : }
    2853             : 
    2854             : void
    2855           4 : nvme_ctrlr_op_rpc(struct nvme_ctrlr *nvme_ctrlr, enum nvme_ctrlr_op op,
    2856             :                   bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2857             : {
    2858             :         struct nvme_ctrlr_op_rpc_ctx *ctx;
    2859             :         int rc;
    2860             : 
    2861           4 :         assert(cb_fn != NULL);
    2862             : 
    2863           4 :         ctx = calloc(1, sizeof(*ctx));
    2864           4 :         if (ctx == NULL) {
    2865           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate nvme_ctrlr_op_rpc_ctx.\n");
    2866           0 :                 cb_fn(cb_arg, -ENOMEM);
    2867           0 :                 return;
    2868             :         }
    2869             : 
    2870           4 :         ctx->orig_thread = spdk_get_thread();
    2871           4 :         ctx->cb_fn = cb_fn;
    2872           4 :         ctx->cb_arg = cb_arg;
    2873             : 
    2874           4 :         rc = nvme_ctrlr_op(nvme_ctrlr, op, nvme_ctrlr_op_rpc_complete, ctx);
    2875           4 :         if (rc == 0) {
    2876           1 :                 return;
    2877           3 :         } else if (rc == -EALREADY) {
    2878           0 :                 rc = 0;
    2879           0 :         }
    2880             : 
    2881           3 :         nvme_ctrlr_op_rpc_complete(ctx, rc);
    2882           4 : }
    2883             : 
    2884             : static void nvme_bdev_ctrlr_op_rpc_continue(void *cb_arg, int rc);
    2885             : 
    2886             : static void
    2887           2 : _nvme_bdev_ctrlr_op_rpc_continue(void *_ctx)
    2888             : {
    2889           2 :         struct nvme_ctrlr_op_rpc_ctx *ctx = _ctx;
    2890             :         struct nvme_ctrlr *prev_nvme_ctrlr, *next_nvme_ctrlr;
    2891             :         int rc;
    2892             : 
    2893           2 :         prev_nvme_ctrlr = ctx->nvme_ctrlr;
    2894           2 :         ctx->nvme_ctrlr = NULL;
    2895             : 
    2896           2 :         if (ctx->rc != 0) {
    2897           0 :                 goto complete;
    2898             :         }
    2899             : 
    2900           2 :         next_nvme_ctrlr = TAILQ_NEXT(prev_nvme_ctrlr, tailq);
    2901           2 :         if (next_nvme_ctrlr == NULL) {
    2902           1 :                 goto complete;
    2903             :         }
    2904             : 
    2905           1 :         rc = nvme_ctrlr_op(next_nvme_ctrlr, ctx->op, nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2906           1 :         if (rc == 0) {
    2907           1 :                 ctx->nvme_ctrlr = next_nvme_ctrlr;
    2908           1 :                 return;
    2909           0 :         } else if (rc == -EALREADY) {
    2910           0 :                 ctx->nvme_ctrlr = next_nvme_ctrlr;
    2911           0 :                 rc = 0;
    2912           0 :         }
    2913             : 
    2914           0 :         ctx->rc = rc;
    2915             : 
    2916             : complete:
    2917           1 :         ctx->cb_fn(ctx->cb_arg, ctx->rc);
    2918           1 :         free(ctx);
    2919           2 : }
    2920             : 
    2921             : static void
    2922           2 : nvme_bdev_ctrlr_op_rpc_continue(void *cb_arg, int rc)
    2923             : {
    2924           2 :         struct nvme_ctrlr_op_rpc_ctx *ctx = cb_arg;
    2925             : 
    2926           2 :         ctx->rc = rc;
    2927             : 
    2928           2 :         spdk_thread_send_msg(ctx->orig_thread, _nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2929           2 : }
    2930             : 
    2931             : void
    2932           1 : nvme_bdev_ctrlr_op_rpc(struct nvme_bdev_ctrlr *nbdev_ctrlr, enum nvme_ctrlr_op op,
    2933             :                        bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2934             : {
    2935             :         struct nvme_ctrlr_op_rpc_ctx *ctx;
    2936             :         struct nvme_ctrlr *nvme_ctrlr;
    2937             :         int rc;
    2938             : 
    2939           1 :         assert(cb_fn != NULL);
    2940             : 
    2941           1 :         ctx = calloc(1, sizeof(*ctx));
    2942           1 :         if (ctx == NULL) {
    2943           0 :                 SPDK_ERRLOG("Failed to allocate nvme_ctrlr_op_rpc_ctx.\n");
    2944           0 :                 cb_fn(cb_arg, -ENOMEM);
    2945           0 :                 return;
    2946             :         }
    2947             : 
    2948           1 :         ctx->orig_thread = spdk_get_thread();
    2949           1 :         ctx->op = op;
    2950           1 :         ctx->cb_fn = cb_fn;
    2951           1 :         ctx->cb_arg = cb_arg;
    2952             : 
    2953           1 :         nvme_ctrlr = TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
    2954           1 :         assert(nvme_ctrlr != NULL);
    2955             : 
    2956           1 :         rc = nvme_ctrlr_op(nvme_ctrlr, op, nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2957           1 :         if (rc == 0) {
    2958           1 :                 ctx->nvme_ctrlr = nvme_ctrlr;
    2959           1 :                 return;
    2960           0 :         } else if (rc == -EALREADY) {
    2961           0 :                 ctx->nvme_ctrlr = nvme_ctrlr;
    2962           0 :                 rc = 0;
    2963           0 :         }
    2964             : 
    2965           0 :         nvme_bdev_ctrlr_op_rpc_continue(ctx, rc);
    2966           1 : }
    2967             : 
    2968             : static int _bdev_nvme_reset_io(struct nvme_io_path *io_path, struct nvme_bdev_io *bio);
    2969             : 
    2970             : static void
    2971          16 : bdev_nvme_unfreeze_bdev_channel_done(struct nvme_bdev *nbdev, void *ctx, int status)
    2972             : {
    2973          16 :         struct nvme_bdev_io *bio = ctx;
    2974             :         enum spdk_bdev_io_status io_status;
    2975             : 
    2976          16 :         if (bio->cpl.cdw0 == 0) {
    2977          12 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    2978          12 :         } else {
    2979           4 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    2980             :         }
    2981             : 
    2982          16 :         NVME_BDEV_INFOLOG(nbdev, "reset_io %p completed, status:%d\n", bio, io_status);
    2983             : 
    2984          16 :         __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), io_status, NULL);
    2985          16 : }
    2986             : 
    2987             : static void
    2988          32 : bdev_nvme_unfreeze_bdev_channel(struct nvme_bdev_channel_iter *i,
    2989             :                                 struct nvme_bdev *nbdev,
    2990             :                                 struct nvme_bdev_channel *nbdev_ch, void *ctx)
    2991             : {
    2992          32 :         bdev_nvme_abort_retry_ios(nbdev_ch);
    2993          32 :         nbdev_ch->resetting = false;
    2994             : 
    2995          32 :         nvme_bdev_for_each_channel_continue(i, 0);
    2996          32 : }
    2997             : 
    2998             : static void
    2999          16 : bdev_nvme_reset_io_complete(struct nvme_bdev_io *bio)
    3000             : {
    3001          16 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3002          16 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    3003             : 
    3004             :         /* Abort all queued I/Os for retry. */
    3005          32 :         nvme_bdev_for_each_channel(nbdev,
    3006             :                                    bdev_nvme_unfreeze_bdev_channel,
    3007          16 :                                    bio,
    3008             :                                    bdev_nvme_unfreeze_bdev_channel_done);
    3009          16 : }
    3010             : 
    3011             : static void
    3012          26 : _bdev_nvme_reset_io_continue(void *ctx)
    3013             : {
    3014          26 :         struct nvme_bdev_io *bio = ctx;
    3015             :         struct nvme_io_path *prev_io_path, *next_io_path;
    3016             :         int rc;
    3017             : 
    3018          26 :         prev_io_path = bio->io_path;
    3019          26 :         bio->io_path = NULL;
    3020             : 
    3021          26 :         next_io_path = STAILQ_NEXT(prev_io_path, stailq);
    3022          26 :         if (next_io_path == NULL) {
    3023          16 :                 goto complete;
    3024             :         }
    3025             : 
    3026          10 :         rc = _bdev_nvme_reset_io(next_io_path, bio);
    3027          10 :         if (rc == 0) {
    3028          10 :                 return;
    3029             :         }
    3030             : 
    3031             : complete:
    3032          16 :         bdev_nvme_reset_io_complete(bio);
    3033          26 : }
    3034             : 
    3035             : static void
    3036          26 : bdev_nvme_reset_io_continue(void *cb_arg, int rc)
    3037             : {
    3038          26 :         struct nvme_bdev_io *bio = cb_arg;
    3039          26 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3040          26 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    3041             : 
    3042          26 :         NVME_BDEV_INFOLOG(nbdev, "continue reset_io %p, rc:%d\n", bio, rc);
    3043             : 
    3044             :         /* Reset status is initialized as "failed". Set to "success" once we have at least one
    3045             :          * successfully reset nvme_ctrlr.
    3046             :          */
    3047          26 :         if (rc == 0) {
    3048          16 :                 bio->cpl.cdw0 = 0;
    3049          16 :         }
    3050             : 
    3051          26 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io), _bdev_nvme_reset_io_continue, bio);
    3052          26 : }
    3053             : 
    3054             : static int
    3055          26 : _bdev_nvme_reset_io(struct nvme_io_path *io_path, struct nvme_bdev_io *bio)
    3056             : {
    3057          26 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3058          26 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    3059          26 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    3060             :         spdk_msg_fn msg_fn;
    3061             :         int rc;
    3062             : 
    3063          26 :         assert(bio->io_path == NULL);
    3064          26 :         bio->io_path = io_path;
    3065             : 
    3066          26 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    3067          26 :         rc = bdev_nvme_reset_ctrlr_unsafe(nvme_ctrlr, &msg_fn);
    3068          26 :         if (rc == -EBUSY) {
    3069             :                 /*
    3070             :                  * Reset call is queued only if it is from the app framework. This is on purpose so that
    3071             :                  * we don't interfere with the app framework reset strategy. i.e. we are deferring to the
    3072             :                  * upper level. If they are in the middle of a reset, we won't try to schedule another one.
    3073             :                  */
    3074          12 :                 TAILQ_INSERT_TAIL(&nvme_ctrlr->pending_resets, bio, retry_link);
    3075          12 :         }
    3076          26 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    3077             : 
    3078          26 :         if (rc == 0) {
    3079          13 :                 assert(nvme_ctrlr->ctrlr_op_cb_fn == NULL);
    3080          13 :                 assert(nvme_ctrlr->ctrlr_op_cb_arg == NULL);
    3081          13 :                 nvme_ctrlr->ctrlr_op_cb_fn = bdev_nvme_reset_io_continue;
    3082          13 :                 nvme_ctrlr->ctrlr_op_cb_arg = bio;
    3083             : 
    3084          13 :                 spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    3085             : 
    3086          13 :                 NVME_BDEV_INFOLOG(nbdev, "reset_io %p started resetting ctrlr [%s, %u].\n",
    3087             :                                   bio, CTRLR_STRING(nvme_ctrlr), CTRLR_ID(nvme_ctrlr));
    3088          26 :         } else if (rc == -EBUSY) {
    3089          12 :                 rc = 0;
    3090             : 
    3091          12 :                 NVME_BDEV_INFOLOG(nbdev, "reset_io %p was queued to ctrlr [%s, %u].\n",
    3092             :                                   bio, CTRLR_STRING(nvme_ctrlr), CTRLR_ID(nvme_ctrlr));
    3093          12 :         } else {
    3094           1 :                 NVME_BDEV_INFOLOG(nbdev, "reset_io %p could not reset ctrlr [%s, %u], rc:%d\n",
    3095             :                                   bio, CTRLR_STRING(nvme_ctrlr), CTRLR_ID(nvme_ctrlr), rc);
    3096             :         }
    3097             : 
    3098          26 :         return rc;
    3099             : }
    3100             : 
    3101             : static void
    3102          16 : bdev_nvme_freeze_bdev_channel_done(struct nvme_bdev *nbdev, void *ctx, int status)
    3103             : {
    3104          16 :         struct nvme_bdev_io *bio = ctx;
    3105          16 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3106             :         struct nvme_bdev_channel *nbdev_ch;
    3107             :         struct nvme_io_path *io_path;
    3108             :         int rc;
    3109             : 
    3110          16 :         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    3111             : 
    3112             :         /* Initialize with failed status. With multipath it is enough to have at least one successful
    3113             :          * nvme_ctrlr reset. If there is none, reset status will remain failed.
    3114             :          */
    3115          16 :         bio->cpl.cdw0 = 1;
    3116             : 
    3117             :         /* Reset all nvme_ctrlrs of a bdev controller sequentially. */
    3118          16 :         io_path = STAILQ_FIRST(&nbdev_ch->io_path_list);
    3119          16 :         assert(io_path != NULL);
    3120             : 
    3121          16 :         rc = _bdev_nvme_reset_io(io_path, bio);
    3122          16 :         if (rc != 0) {
    3123             :                 /* If the current nvme_ctrlr is disabled, skip it and move to the next nvme_ctrlr. */
    3124           1 :                 rc = (rc == -EALREADY) ? 0 : rc;
    3125             : 
    3126           1 :                 bdev_nvme_reset_io_continue(bio, rc);
    3127           1 :         }
    3128          16 : }
    3129             : 
    3130             : static void
    3131          30 : bdev_nvme_freeze_bdev_channel(struct nvme_bdev_channel_iter *i,
    3132             :                               struct nvme_bdev *nbdev,
    3133             :                               struct nvme_bdev_channel *nbdev_ch, void *ctx)
    3134             : {
    3135          30 :         nbdev_ch->resetting = true;
    3136             : 
    3137          30 :         nvme_bdev_for_each_channel_continue(i, 0);
    3138          30 : }
    3139             : 
    3140             : static void
    3141          15 : bdev_nvme_reset_io(struct nvme_bdev *nbdev, struct nvme_bdev_io *bio)
    3142             : {
    3143          15 :         NVME_BDEV_INFOLOG(nbdev, "reset_io %p started.\n", bio);
    3144             : 
    3145          30 :         nvme_bdev_for_each_channel(nbdev,
    3146             :                                    bdev_nvme_freeze_bdev_channel,
    3147          15 :                                    bio,
    3148             :                                    bdev_nvme_freeze_bdev_channel_done);
    3149          15 : }
    3150             : 
    3151             : static int
    3152          32 : bdev_nvme_failover_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool remove)
    3153             : {
    3154          32 :         if (nvme_ctrlr->destruct) {
    3155             :                 /* Don't bother resetting if the controller is in the process of being destructed. */
    3156           2 :                 return -ENXIO;
    3157             :         }
    3158             : 
    3159          30 :         if (nvme_ctrlr->resetting) {
    3160           3 :                 if (!nvme_ctrlr->in_failover) {
    3161           3 :                         NVME_CTRLR_NOTICELOG(nvme_ctrlr,
    3162             :                                              "Reset is already in progress. Defer failover until reset completes.\n");
    3163             : 
    3164             :                         /* Defer failover until reset completes. */
    3165           3 :                         nvme_ctrlr->pending_failover = true;
    3166           3 :                         return -EINPROGRESS;
    3167             :                 } else {
    3168           0 :                         NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Unable to perform failover, already in progress.\n");
    3169           0 :                         return -EBUSY;
    3170             :                 }
    3171             :         }
    3172             : 
    3173          27 :         bdev_nvme_failover_trid(nvme_ctrlr, remove, true);
    3174             : 
    3175          27 :         if (nvme_ctrlr->reconnect_is_delayed) {
    3176           1 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Reconnect is already scheduled.\n");
    3177             : 
    3178             :                 /* We rely on the next reconnect for the failover. */
    3179           1 :                 return -EALREADY;
    3180             :         }
    3181             : 
    3182          26 :         if (nvme_ctrlr->disabled) {
    3183           0 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Controller is disabled.\n");
    3184             : 
    3185             :                 /* We rely on the enablement for the failover. */
    3186           0 :                 return -EALREADY;
    3187             :         }
    3188             : 
    3189          26 :         nvme_ctrlr->resetting = true;
    3190          26 :         nvme_ctrlr->in_failover = true;
    3191             : 
    3192          26 :         assert(nvme_ctrlr->reset_start_tsc == 0);
    3193          26 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    3194             : 
    3195          26 :         return 0;
    3196          32 : }
    3197             : 
    3198             : static int
    3199          30 : bdev_nvme_failover_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    3200             : {
    3201             :         int rc;
    3202             : 
    3203          30 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    3204          30 :         rc = bdev_nvme_failover_ctrlr_unsafe(nvme_ctrlr, false);
    3205          30 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    3206             : 
    3207          30 :         if (rc == 0) {
    3208          25 :                 spdk_thread_send_msg(nvme_ctrlr->thread, _bdev_nvme_reset_ctrlr, nvme_ctrlr);
    3209          30 :         } else if (rc == -EALREADY) {
    3210           0 :                 rc = 0;
    3211           0 :         }
    3212             : 
    3213          30 :         return rc;
    3214             : }
    3215             : 
    3216             : static int bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks,
    3217             :                            uint64_t num_blocks);
    3218             : 
    3219             : static int bdev_nvme_write_zeroes(struct nvme_bdev_io *bio, uint64_t offset_blocks,
    3220             :                                   uint64_t num_blocks);
    3221             : 
    3222             : static int bdev_nvme_copy(struct nvme_bdev_io *bio, uint64_t dst_offset_blocks,
    3223             :                           uint64_t src_offset_blocks,
    3224             :                           uint64_t num_blocks);
    3225             : 
    3226             : static void
    3227           1 : bdev_nvme_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    3228             :                      bool success)
    3229             : {
    3230           1 :         struct nvme_bdev_io *bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3231             :         int ret;
    3232             : 
    3233           1 :         if (!success) {
    3234           0 :                 ret = -EINVAL;
    3235           0 :                 goto exit;
    3236             :         }
    3237             : 
    3238           1 :         if (spdk_unlikely(!nvme_io_path_is_available(bio->io_path))) {
    3239           0 :                 ret = -ENXIO;
    3240           0 :                 goto exit;
    3241             :         }
    3242             : 
    3243           2 :         ret = bdev_nvme_readv(bio,
    3244           1 :                               bdev_io->u.bdev.iovs,
    3245           1 :                               bdev_io->u.bdev.iovcnt,
    3246           1 :                               bdev_io->u.bdev.md_buf,
    3247           1 :                               bdev_io->u.bdev.num_blocks,
    3248           1 :                               bdev_io->u.bdev.offset_blocks,
    3249           1 :                               bdev_io->u.bdev.dif_check_flags,
    3250           1 :                               bdev_io->u.bdev.memory_domain,
    3251           1 :                               bdev_io->u.bdev.memory_domain_ctx,
    3252           1 :                               bdev_io->u.bdev.accel_sequence);
    3253             : 
    3254             : exit:
    3255           1 :         if (spdk_unlikely(ret != 0)) {
    3256           0 :                 bdev_nvme_io_complete(bio, ret);
    3257           0 :         }
    3258           1 : }
    3259             : 
    3260             : static inline void
    3261          59 : _bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
    3262             : {
    3263          59 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3264          59 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3265             :         struct nvme_bdev_io *nbdev_io_to_abort;
    3266          59 :         int rc = 0;
    3267             : 
    3268          59 :         switch (bdev_io->type) {
    3269             :         case SPDK_BDEV_IO_TYPE_READ:
    3270           3 :                 if (bdev_io->u.bdev.iovs && bdev_io->u.bdev.iovs[0].iov_base) {
    3271             : 
    3272           4 :                         rc = bdev_nvme_readv(nbdev_io,
    3273           2 :                                              bdev_io->u.bdev.iovs,
    3274           2 :                                              bdev_io->u.bdev.iovcnt,
    3275           2 :                                              bdev_io->u.bdev.md_buf,
    3276           2 :                                              bdev_io->u.bdev.num_blocks,
    3277           2 :                                              bdev_io->u.bdev.offset_blocks,
    3278           2 :                                              bdev_io->u.bdev.dif_check_flags,
    3279           2 :                                              bdev_io->u.bdev.memory_domain,
    3280           2 :                                              bdev_io->u.bdev.memory_domain_ctx,
    3281           2 :                                              bdev_io->u.bdev.accel_sequence);
    3282           2 :                 } else {
    3283           2 :                         spdk_bdev_io_get_buf(bdev_io, bdev_nvme_get_buf_cb,
    3284           1 :                                              bdev_io->u.bdev.num_blocks * bdev->blocklen);
    3285           1 :                         rc = 0;
    3286             :                 }
    3287           3 :                 break;
    3288             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3289          50 :                 rc = bdev_nvme_writev(nbdev_io,
    3290          25 :                                       bdev_io->u.bdev.iovs,
    3291          25 :                                       bdev_io->u.bdev.iovcnt,
    3292          25 :                                       bdev_io->u.bdev.md_buf,
    3293          25 :                                       bdev_io->u.bdev.num_blocks,
    3294          25 :                                       bdev_io->u.bdev.offset_blocks,
    3295          25 :                                       bdev_io->u.bdev.dif_check_flags,
    3296          25 :                                       bdev_io->u.bdev.memory_domain,
    3297          25 :                                       bdev_io->u.bdev.memory_domain_ctx,
    3298          25 :                                       bdev_io->u.bdev.accel_sequence,
    3299          25 :                                       bdev_io->u.bdev.nvme_cdw12,
    3300          25 :                                       bdev_io->u.bdev.nvme_cdw13);
    3301          25 :                 break;
    3302             :         case SPDK_BDEV_IO_TYPE_COMPARE:
    3303           2 :                 rc = bdev_nvme_comparev(nbdev_io,
    3304           1 :                                         bdev_io->u.bdev.iovs,
    3305           1 :                                         bdev_io->u.bdev.iovcnt,
    3306           1 :                                         bdev_io->u.bdev.md_buf,
    3307           1 :                                         bdev_io->u.bdev.num_blocks,
    3308           1 :                                         bdev_io->u.bdev.offset_blocks,
    3309           1 :                                         bdev_io->u.bdev.dif_check_flags);
    3310           1 :                 break;
    3311             :         case SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE:
    3312           4 :                 rc = bdev_nvme_comparev_and_writev(nbdev_io,
    3313           2 :                                                    bdev_io->u.bdev.iovs,
    3314           2 :                                                    bdev_io->u.bdev.iovcnt,
    3315           2 :                                                    bdev_io->u.bdev.fused_iovs,
    3316           2 :                                                    bdev_io->u.bdev.fused_iovcnt,
    3317           2 :                                                    bdev_io->u.bdev.md_buf,
    3318           2 :                                                    bdev_io->u.bdev.num_blocks,
    3319           2 :                                                    bdev_io->u.bdev.offset_blocks,
    3320           2 :                                                    bdev_io->u.bdev.dif_check_flags);
    3321           2 :                 break;
    3322             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3323           2 :                 rc = bdev_nvme_unmap(nbdev_io,
    3324           1 :                                      bdev_io->u.bdev.offset_blocks,
    3325           1 :                                      bdev_io->u.bdev.num_blocks);
    3326           1 :                 break;
    3327             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3328           0 :                 rc =  bdev_nvme_write_zeroes(nbdev_io,
    3329           0 :                                              bdev_io->u.bdev.offset_blocks,
    3330           0 :                                              bdev_io->u.bdev.num_blocks);
    3331           0 :                 break;
    3332             :         case SPDK_BDEV_IO_TYPE_RESET:
    3333          15 :                 nbdev_io->io_path = NULL;
    3334          15 :                 bdev_nvme_reset_io(bdev->ctxt, nbdev_io);
    3335          15 :                 return;
    3336             : 
    3337             :         case SPDK_BDEV_IO_TYPE_FLUSH:
    3338           1 :                 bdev_nvme_io_complete(nbdev_io, 0);
    3339           1 :                 return;
    3340             : 
    3341             :         case SPDK_BDEV_IO_TYPE_ZONE_APPEND:
    3342           0 :                 rc = bdev_nvme_zone_appendv(nbdev_io,
    3343           0 :                                             bdev_io->u.bdev.iovs,
    3344           0 :                                             bdev_io->u.bdev.iovcnt,
    3345           0 :                                             bdev_io->u.bdev.md_buf,
    3346           0 :                                             bdev_io->u.bdev.num_blocks,
    3347           0 :                                             bdev_io->u.bdev.offset_blocks,
    3348           0 :                                             bdev_io->u.bdev.dif_check_flags);
    3349           0 :                 break;
    3350             :         case SPDK_BDEV_IO_TYPE_GET_ZONE_INFO:
    3351           0 :                 rc = bdev_nvme_get_zone_info(nbdev_io,
    3352           0 :                                              bdev_io->u.zone_mgmt.zone_id,
    3353           0 :                                              bdev_io->u.zone_mgmt.num_zones,
    3354           0 :                                              bdev_io->u.zone_mgmt.buf);
    3355           0 :                 break;
    3356             :         case SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT:
    3357           0 :                 rc = bdev_nvme_zone_management(nbdev_io,
    3358           0 :                                                bdev_io->u.zone_mgmt.zone_id,
    3359           0 :                                                bdev_io->u.zone_mgmt.zone_action);
    3360           0 :                 break;
    3361             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3362           5 :                 nbdev_io->io_path = NULL;
    3363          10 :                 bdev_nvme_admin_passthru(nbdev_ch,
    3364           5 :                                          nbdev_io,
    3365           5 :                                          &bdev_io->u.nvme_passthru.cmd,
    3366           5 :                                          bdev_io->u.nvme_passthru.buf,
    3367           5 :                                          bdev_io->u.nvme_passthru.nbytes);
    3368           5 :                 return;
    3369             : 
    3370             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3371           0 :                 rc = bdev_nvme_io_passthru(nbdev_io,
    3372           0 :                                            &bdev_io->u.nvme_passthru.cmd,
    3373           0 :                                            bdev_io->u.nvme_passthru.buf,
    3374           0 :                                            bdev_io->u.nvme_passthru.nbytes);
    3375           0 :                 break;
    3376             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3377           0 :                 rc = bdev_nvme_io_passthru_md(nbdev_io,
    3378           0 :                                               &bdev_io->u.nvme_passthru.cmd,
    3379           0 :                                               bdev_io->u.nvme_passthru.buf,
    3380           0 :                                               bdev_io->u.nvme_passthru.nbytes,
    3381           0 :                                               bdev_io->u.nvme_passthru.md_buf,
    3382           0 :                                               bdev_io->u.nvme_passthru.md_len);
    3383           0 :                 break;
    3384             :         case SPDK_BDEV_IO_TYPE_NVME_IOV_MD:
    3385           0 :                 rc = bdev_nvme_iov_passthru_md(nbdev_io,
    3386           0 :                                                &bdev_io->u.nvme_passthru.cmd,
    3387           0 :                                                bdev_io->u.nvme_passthru.iovs,
    3388           0 :                                                bdev_io->u.nvme_passthru.iovcnt,
    3389           0 :                                                bdev_io->u.nvme_passthru.nbytes,
    3390           0 :                                                bdev_io->u.nvme_passthru.md_buf,
    3391           0 :                                                bdev_io->u.nvme_passthru.md_len);
    3392           0 :                 break;
    3393             :         case SPDK_BDEV_IO_TYPE_ABORT:
    3394           6 :                 nbdev_io->io_path = NULL;
    3395           6 :                 nbdev_io_to_abort = (struct nvme_bdev_io *)bdev_io->u.abort.bio_to_abort->driver_ctx;
    3396          12 :                 bdev_nvme_abort(nbdev_ch,
    3397           6 :                                 nbdev_io,
    3398           6 :                                 nbdev_io_to_abort);
    3399           6 :                 return;
    3400             : 
    3401             :         case SPDK_BDEV_IO_TYPE_COPY:
    3402           0 :                 rc = bdev_nvme_copy(nbdev_io,
    3403           0 :                                     bdev_io->u.bdev.offset_blocks,
    3404           0 :                                     bdev_io->u.bdev.copy.src_offset_blocks,
    3405           0 :                                     bdev_io->u.bdev.num_blocks);
    3406           0 :                 break;
    3407             :         default:
    3408           0 :                 rc = -EINVAL;
    3409           0 :                 break;
    3410             :         }
    3411             : 
    3412          32 :         if (spdk_unlikely(rc != 0)) {
    3413           0 :                 bdev_nvme_io_complete(nbdev_io, rc);
    3414           0 :         }
    3415          59 : }
    3416             : 
    3417             : static void
    3418          68 : bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
    3419             : {
    3420          68 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
    3421          68 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3422             : 
    3423          68 :         if (spdk_likely(nbdev_io->submit_tsc == 0)) {
    3424          68 :                 nbdev_io->submit_tsc = spdk_bdev_io_get_submit_tsc(bdev_io);
    3425          68 :         } else {
    3426             :                 /* There are cases where submit_tsc != 0, i.e. retry I/O.
    3427             :                  * We need to update submit_tsc here.
    3428             :                  */
    3429           0 :                 nbdev_io->submit_tsc = spdk_get_ticks();
    3430             :         }
    3431             : 
    3432          68 :         spdk_trace_record(TRACE_BDEV_NVME_IO_START, 0, 0, (uintptr_t)nbdev_io, (uintptr_t)bdev_io);
    3433          68 :         nbdev_io->io_path = bdev_nvme_find_io_path(nbdev_ch);
    3434          68 :         if (spdk_unlikely(!nbdev_io->io_path)) {
    3435          13 :                 if (!bdev_nvme_io_type_is_admin(bdev_io->type)) {
    3436          12 :                         bdev_nvme_io_complete(nbdev_io, -ENXIO);
    3437          12 :                         return;
    3438             :                 }
    3439             : 
    3440             :                 /* Admin commands do not use the optimal I/O path.
    3441             :                  * Simply fall through even if it is not found.
    3442             :                  */
    3443           1 :         }
    3444             : 
    3445          56 :         _bdev_nvme_submit_request(nbdev_ch, bdev_io);
    3446          68 : }
    3447             : 
    3448             : static bool
    3449           0 : bdev_nvme_is_supported_csi(enum spdk_nvme_csi csi)
    3450             : {
    3451           0 :         switch (csi) {
    3452             :         case SPDK_NVME_CSI_NVM:
    3453           0 :                 return true;
    3454             :         case SPDK_NVME_CSI_ZNS:
    3455           0 :                 return true;
    3456             :         default:
    3457           0 :                 return false;
    3458             :         }
    3459           0 : }
    3460             : 
    3461             : static bool
    3462           0 : bdev_nvme_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
    3463             : {
    3464           0 :         struct nvme_bdev *nbdev = ctx;
    3465             :         struct nvme_ns *nvme_ns;
    3466             :         struct spdk_nvme_ns *ns;
    3467             :         struct spdk_nvme_ctrlr *ctrlr;
    3468             :         const struct spdk_nvme_ctrlr_data *cdata;
    3469             : 
    3470           0 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    3471           0 :         assert(nvme_ns != NULL);
    3472           0 :         ns = nvme_ns->ns;
    3473           0 :         if (ns == NULL) {
    3474           0 :                 return false;
    3475             :         }
    3476             : 
    3477           0 :         if (!bdev_nvme_is_supported_csi(spdk_nvme_ns_get_csi(ns))) {
    3478           0 :                 switch (io_type) {
    3479             :                 case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3480             :                 case SPDK_BDEV_IO_TYPE_NVME_IO:
    3481           0 :                         return true;
    3482             : 
    3483             :                 case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3484           0 :                         return spdk_nvme_ns_get_md_size(ns) ? true : false;
    3485             : 
    3486             :                 default:
    3487           0 :                         return false;
    3488             :                 }
    3489             :         }
    3490             : 
    3491           0 :         ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    3492             : 
    3493           0 :         switch (io_type) {
    3494             :         case SPDK_BDEV_IO_TYPE_READ:
    3495             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3496             :         case SPDK_BDEV_IO_TYPE_RESET:
    3497             :         case SPDK_BDEV_IO_TYPE_FLUSH:
    3498             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3499             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3500             :         case SPDK_BDEV_IO_TYPE_ABORT:
    3501           0 :                 return true;
    3502             : 
    3503             :         case SPDK_BDEV_IO_TYPE_COMPARE:
    3504           0 :                 return spdk_nvme_ns_supports_compare(ns);
    3505             : 
    3506             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3507           0 :                 return spdk_nvme_ns_get_md_size(ns) ? true : false;
    3508             : 
    3509             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3510           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3511           0 :                 return cdata->oncs.dsm;
    3512             : 
    3513             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3514           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3515           0 :                 return cdata->oncs.write_zeroes;
    3516             : 
    3517             :         case SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE:
    3518           0 :                 if (spdk_nvme_ctrlr_get_flags(ctrlr) &
    3519             :                     SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED) {
    3520           0 :                         return true;
    3521             :                 }
    3522           0 :                 return false;
    3523             : 
    3524             :         case SPDK_BDEV_IO_TYPE_GET_ZONE_INFO:
    3525             :         case SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT:
    3526           0 :                 return spdk_nvme_ns_get_csi(ns) == SPDK_NVME_CSI_ZNS;
    3527             : 
    3528             :         case SPDK_BDEV_IO_TYPE_ZONE_APPEND:
    3529           0 :                 return spdk_nvme_ns_get_csi(ns) == SPDK_NVME_CSI_ZNS &&
    3530           0 :                        spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_ZONE_APPEND_SUPPORTED;
    3531             : 
    3532             :         case SPDK_BDEV_IO_TYPE_COPY:
    3533           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3534           0 :                 return cdata->oncs.copy;
    3535             : 
    3536             :         default:
    3537           0 :                 return false;
    3538             :         }
    3539           0 : }
    3540             : 
    3541             : static int
    3542          61 : nvme_qpair_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ctrlr_channel *ctrlr_ch)
    3543             : {
    3544             :         struct nvme_qpair *nvme_qpair;
    3545             :         struct spdk_io_channel *pg_ch;
    3546             :         int rc;
    3547             : 
    3548          61 :         nvme_qpair = calloc(1, sizeof(*nvme_qpair));
    3549          61 :         if (!nvme_qpair) {
    3550           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to alloc nvme_qpair.\n");
    3551           0 :                 return -1;
    3552             :         }
    3553             : 
    3554          61 :         TAILQ_INIT(&nvme_qpair->io_path_list);
    3555             : 
    3556          61 :         nvme_qpair->ctrlr = nvme_ctrlr;
    3557          61 :         nvme_qpair->ctrlr_ch = ctrlr_ch;
    3558             : 
    3559          61 :         pg_ch = spdk_get_io_channel(&g_nvme_bdev_ctrlrs);
    3560          61 :         if (!pg_ch) {
    3561           0 :                 free(nvme_qpair);
    3562           0 :                 return -1;
    3563             :         }
    3564             : 
    3565          61 :         nvme_qpair->group = spdk_io_channel_get_ctx(pg_ch);
    3566             : 
    3567             : #ifdef SPDK_CONFIG_VTUNE
    3568             :         nvme_qpair->group->collect_spin_stat = true;
    3569             : #else
    3570          61 :         nvme_qpair->group->collect_spin_stat = false;
    3571             : #endif
    3572             : 
    3573          61 :         if (!nvme_ctrlr->disabled) {
    3574             :                 /* If a nvme_ctrlr is disabled, don't try to create qpair for it. Qpair will
    3575             :                  * be created when it's enabled.
    3576             :                  */
    3577          61 :                 rc = bdev_nvme_create_qpair(nvme_qpair);
    3578          61 :                 if (rc != 0) {
    3579             :                         /* nvme_ctrlr can't create IO qpair if connection is down.
    3580             :                          * If reconnect_delay_sec is non-zero, creating IO qpair is retried
    3581             :                          * after reconnect_delay_sec seconds. If bdev_retry_count is non-zero,
    3582             :                          * submitted IO will be queued until IO qpair is successfully created.
    3583             :                          *
    3584             :                          * Hence, if both are satisfied, ignore the failure.
    3585             :                          */
    3586           0 :                         if (nvme_ctrlr->opts.reconnect_delay_sec == 0 || g_opts.bdev_retry_count == 0) {
    3587           0 :                                 spdk_put_io_channel(pg_ch);
    3588           0 :                                 free(nvme_qpair);
    3589           0 :                                 return rc;
    3590             :                         }
    3591           0 :                 }
    3592          61 :         }
    3593             : 
    3594          61 :         TAILQ_INSERT_TAIL(&nvme_qpair->group->qpair_list, nvme_qpair, tailq);
    3595             : 
    3596          61 :         ctrlr_ch->qpair = nvme_qpair;
    3597             : 
    3598          61 :         nvme_ctrlr_get_ref(nvme_ctrlr);
    3599             : 
    3600          61 :         return 0;
    3601          61 : }
    3602             : 
    3603             : static int
    3604          61 : bdev_nvme_create_ctrlr_channel_cb(void *io_device, void *ctx_buf)
    3605             : {
    3606          61 :         struct nvme_ctrlr *nvme_ctrlr = io_device;
    3607          61 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
    3608             : 
    3609          61 :         return nvme_qpair_create(nvme_ctrlr, ctrlr_ch);
    3610             : }
    3611             : 
    3612             : static void
    3613          61 : nvme_qpair_delete(struct nvme_qpair *nvme_qpair)
    3614             : {
    3615             :         struct nvme_io_path *io_path, *next;
    3616             : 
    3617          61 :         assert(nvme_qpair->group != NULL);
    3618             : 
    3619         100 :         TAILQ_FOREACH_SAFE(io_path, &nvme_qpair->io_path_list, tailq, next) {
    3620          39 :                 TAILQ_REMOVE(&nvme_qpair->io_path_list, io_path, tailq);
    3621          39 :                 nvme_io_path_free(io_path);
    3622          39 :         }
    3623             : 
    3624          61 :         TAILQ_REMOVE(&nvme_qpair->group->qpair_list, nvme_qpair, tailq);
    3625             : 
    3626          61 :         spdk_put_io_channel(spdk_io_channel_from_ctx(nvme_qpair->group));
    3627             : 
    3628          61 :         nvme_ctrlr_put_ref(nvme_qpair->ctrlr);
    3629             : 
    3630          61 :         free(nvme_qpair);
    3631          61 : }
    3632             : 
    3633             : static void
    3634          61 : bdev_nvme_destroy_ctrlr_channel_cb(void *io_device, void *ctx_buf)
    3635             : {
    3636          61 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
    3637             :         struct nvme_qpair *nvme_qpair;
    3638             : 
    3639          61 :         nvme_qpair = ctrlr_ch->qpair;
    3640          61 :         assert(nvme_qpair != NULL);
    3641             : 
    3642          61 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    3643             : 
    3644          61 :         if (nvme_qpair->qpair != NULL) {
    3645             :                 /* Always try to disconnect the qpair, even if a reset is in progress.
    3646             :                  * The qpair may have been created after the reset process started.
    3647             :                  */
    3648          47 :                 spdk_nvme_ctrlr_disconnect_io_qpair(nvme_qpair->qpair);
    3649          47 :                 if (ctrlr_ch->reset_iter) {
    3650             :                         /* Skip current ctrlr_channel in a full reset sequence because
    3651             :                          * it is being deleted now.
    3652             :                          */
    3653           0 :                         nvme_ctrlr_for_each_channel_continue(ctrlr_ch->reset_iter, 0);
    3654           0 :                 }
    3655             : 
    3656             :                 /* We cannot release a reference to the poll group now.
    3657             :                  * The qpair may be disconnected asynchronously later.
    3658             :                  * We need to poll it until it is actually disconnected.
    3659             :                  * Just detach the qpair from the deleting ctrlr_channel.
    3660             :                  */
    3661          47 :                 nvme_qpair->ctrlr_ch = NULL;
    3662          47 :         } else {
    3663          14 :                 assert(ctrlr_ch->reset_iter == NULL);
    3664             : 
    3665          14 :                 nvme_qpair_delete(nvme_qpair);
    3666             :         }
    3667          61 : }
    3668             : 
    3669             : static inline struct spdk_io_channel *
    3670           0 : bdev_nvme_get_accel_channel(struct nvme_poll_group *group)
    3671             : {
    3672           0 :         if (spdk_unlikely(!group->accel_channel)) {
    3673           0 :                 group->accel_channel = spdk_accel_get_io_channel();
    3674           0 :                 if (!group->accel_channel) {
    3675           0 :                         SPDK_ERRLOG("Cannot get the accel_channel for bdev nvme polling group=%p\n",
    3676             :                                     group);
    3677           0 :                         return NULL;
    3678             :                 }
    3679           0 :         }
    3680             : 
    3681           0 :         return group->accel_channel;
    3682           0 : }
    3683             : 
    3684             : static void
    3685           0 : bdev_nvme_finish_sequence(void *seq, spdk_nvme_accel_completion_cb cb_fn, void *cb_arg)
    3686             : {
    3687           0 :         spdk_accel_sequence_finish(seq, cb_fn, cb_arg);
    3688           0 : }
    3689             : 
    3690             : static void
    3691           0 : bdev_nvme_abort_sequence(void *seq)
    3692             : {
    3693           0 :         spdk_accel_sequence_abort(seq);
    3694           0 : }
    3695             : 
    3696             : static void
    3697           0 : bdev_nvme_reverse_sequence(void *seq)
    3698             : {
    3699           0 :         spdk_accel_sequence_reverse(seq);
    3700           0 : }
    3701             : 
    3702             : static int
    3703           0 : bdev_nvme_append_crc32c(void *ctx, void **seq, uint32_t *dst, struct iovec *iovs, uint32_t iovcnt,
    3704             :                         struct spdk_memory_domain *domain, void *domain_ctx, uint32_t seed,
    3705             :                         spdk_nvme_accel_step_cb cb_fn, void *cb_arg)
    3706             : {
    3707             :         struct spdk_io_channel *ch;
    3708           0 :         struct nvme_poll_group *group = ctx;
    3709             : 
    3710           0 :         ch = bdev_nvme_get_accel_channel(group);
    3711           0 :         if (spdk_unlikely(ch == NULL)) {
    3712           0 :                 return -ENOMEM;
    3713             :         }
    3714             : 
    3715           0 :         return spdk_accel_append_crc32c((struct spdk_accel_sequence **)seq, ch, dst, iovs, iovcnt,
    3716           0 :                                         domain, domain_ctx, seed, cb_fn, cb_arg);
    3717           0 : }
    3718             : 
    3719             : static int
    3720           0 : bdev_nvme_append_copy(void *ctx, void **seq, struct iovec *dst_iovs, uint32_t dst_iovcnt,
    3721             :                       struct spdk_memory_domain *dst_domain, void *dst_domain_ctx,
    3722             :                       struct iovec *src_iovs, uint32_t src_iovcnt,
    3723             :                       struct spdk_memory_domain *src_domain, void *src_domain_ctx,
    3724             :                       spdk_nvme_accel_step_cb cb_fn, void *cb_arg)
    3725             : {
    3726             :         struct spdk_io_channel *ch;
    3727           0 :         struct nvme_poll_group *group = ctx;
    3728             : 
    3729           0 :         ch = bdev_nvme_get_accel_channel(group);
    3730           0 :         if (spdk_unlikely(ch == NULL)) {
    3731           0 :                 return -ENOMEM;
    3732             :         }
    3733             : 
    3734           0 :         return spdk_accel_append_copy((struct spdk_accel_sequence **)seq, ch,
    3735           0 :                                       dst_iovs, dst_iovcnt, dst_domain, dst_domain_ctx,
    3736           0 :                                       src_iovs, src_iovcnt, src_domain, src_domain_ctx,
    3737           0 :                                       cb_fn, cb_arg);
    3738           0 : }
    3739             : 
    3740             : static struct spdk_nvme_accel_fn_table g_bdev_nvme_accel_fn_table = {
    3741             :         .table_size             = sizeof(struct spdk_nvme_accel_fn_table),
    3742             :         .append_crc32c          = bdev_nvme_append_crc32c,
    3743             :         .append_copy            = bdev_nvme_append_copy,
    3744             :         .finish_sequence        = bdev_nvme_finish_sequence,
    3745             :         .reverse_sequence       = bdev_nvme_reverse_sequence,
    3746             :         .abort_sequence         = bdev_nvme_abort_sequence,
    3747             : };
    3748             : 
    3749             : static int
    3750           0 : bdev_nvme_interrupt_wrapper(void *ctx)
    3751             : {
    3752             :         int num_events;
    3753           0 :         struct nvme_poll_group *group = ctx;
    3754             : 
    3755           0 :         num_events = spdk_nvme_poll_group_wait(group->group, bdev_nvme_disconnected_qpair_cb);
    3756           0 :         if (spdk_unlikely(num_events < 0)) {
    3757           0 :                 bdev_nvme_check_io_qpairs(group);
    3758           0 :         }
    3759             : 
    3760           0 :         return num_events;
    3761             : }
    3762             : 
    3763             : static int
    3764          46 : bdev_nvme_create_poll_group_cb(void *io_device, void *ctx_buf)
    3765             : {
    3766          46 :         struct nvme_poll_group *group = ctx_buf;
    3767             :         uint64_t period;
    3768             :         int fd;
    3769             : 
    3770          46 :         TAILQ_INIT(&group->qpair_list);
    3771             : 
    3772          46 :         group->group = spdk_nvme_poll_group_create(group, &g_bdev_nvme_accel_fn_table);
    3773          46 :         if (group->group == NULL) {
    3774           0 :                 return -1;
    3775             :         }
    3776             : 
    3777          46 :         period = spdk_interrupt_mode_is_enabled() ? 0 : g_opts.nvme_ioq_poll_period_us;
    3778          46 :         group->poller = SPDK_POLLER_REGISTER(bdev_nvme_poll, group, period);
    3779             : 
    3780          46 :         if (group->poller == NULL) {
    3781           0 :                 spdk_nvme_poll_group_destroy(group->group);
    3782           0 :                 return -1;
    3783             :         }
    3784             : 
    3785          46 :         if (spdk_interrupt_mode_is_enabled()) {
    3786           0 :                 spdk_poller_register_interrupt(group->poller, NULL, NULL);
    3787             : 
    3788           0 :                 fd = spdk_nvme_poll_group_get_fd(group->group);
    3789           0 :                 if (fd < 0) {
    3790           0 :                         spdk_nvme_poll_group_destroy(group->group);
    3791           0 :                         return -1;
    3792             :                 }
    3793             : 
    3794           0 :                 group->intr = SPDK_INTERRUPT_REGISTER(fd, bdev_nvme_interrupt_wrapper, group);
    3795           0 :                 if (!group->intr) {
    3796           0 :                         spdk_nvme_poll_group_destroy(group->group);
    3797           0 :                         return -1;
    3798             :                 }
    3799           0 :         }
    3800             : 
    3801          46 :         return 0;
    3802          46 : }
    3803             : 
    3804             : static void
    3805          46 : bdev_nvme_destroy_poll_group_cb(void *io_device, void *ctx_buf)
    3806             : {
    3807          46 :         struct nvme_poll_group *group = ctx_buf;
    3808             : 
    3809          46 :         assert(TAILQ_EMPTY(&group->qpair_list));
    3810             : 
    3811          46 :         if (group->accel_channel) {
    3812           0 :                 spdk_put_io_channel(group->accel_channel);
    3813           0 :         }
    3814             : 
    3815          46 :         if (spdk_interrupt_mode_is_enabled()) {
    3816           0 :                 spdk_interrupt_unregister(&group->intr);
    3817           0 :         }
    3818             : 
    3819          46 :         spdk_poller_unregister(&group->poller);
    3820          46 :         if (spdk_nvme_poll_group_destroy(group->group)) {
    3821           0 :                 SPDK_ERRLOG("Unable to destroy a poll group for the NVMe bdev module.\n");
    3822           0 :                 assert(false);
    3823             :         }
    3824          46 : }
    3825             : 
    3826             : static struct spdk_io_channel *
    3827           0 : bdev_nvme_get_io_channel(void *ctx)
    3828             : {
    3829           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3830             : 
    3831           0 :         return spdk_get_io_channel(nvme_bdev);
    3832             : }
    3833             : 
    3834             : static void *
    3835           0 : bdev_nvme_get_module_ctx(void *ctx)
    3836             : {
    3837           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3838             :         struct nvme_ns *nvme_ns;
    3839             : 
    3840           0 :         if (!nvme_bdev || nvme_bdev->disk.module != &nvme_if) {
    3841           0 :                 return NULL;
    3842             :         }
    3843             : 
    3844           0 :         nvme_ns = TAILQ_FIRST(&nvme_bdev->nvme_ns_list);
    3845           0 :         if (!nvme_ns) {
    3846           0 :                 return NULL;
    3847             :         }
    3848             : 
    3849           0 :         return nvme_ns->ns;
    3850           0 : }
    3851             : 
    3852             : static const char *
    3853           0 : _nvme_ana_state_str(enum spdk_nvme_ana_state ana_state)
    3854             : {
    3855           0 :         switch (ana_state) {
    3856             :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    3857           0 :                 return "optimized";
    3858             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    3859           0 :                 return "non_optimized";
    3860             :         case SPDK_NVME_ANA_INACCESSIBLE_STATE:
    3861           0 :                 return "inaccessible";
    3862             :         case SPDK_NVME_ANA_PERSISTENT_LOSS_STATE:
    3863           0 :                 return "persistent_loss";
    3864             :         case SPDK_NVME_ANA_CHANGE_STATE:
    3865           0 :                 return "change";
    3866             :         default:
    3867           0 :                 return NULL;
    3868             :         }
    3869           0 : }
    3870             : 
    3871             : static int
    3872           8 : bdev_nvme_get_memory_domains(void *ctx, struct spdk_memory_domain **domains, int array_size)
    3873             : {
    3874           8 :         struct spdk_memory_domain **_domains = NULL;
    3875           8 :         struct nvme_bdev *nbdev = ctx;
    3876             :         struct nvme_ns *nvme_ns;
    3877           8 :         int i = 0, _array_size = array_size;
    3878           8 :         int rc = 0;
    3879             : 
    3880          22 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
    3881          14 :                 if (domains && array_size >= i) {
    3882          11 :                         _domains = &domains[i];
    3883          11 :                 } else {
    3884           3 :                         _domains = NULL;
    3885             :                 }
    3886          14 :                 rc = spdk_nvme_ctrlr_get_memory_domains(nvme_ns->ctrlr->ctrlr, _domains, _array_size);
    3887          14 :                 if (rc > 0) {
    3888          13 :                         i += rc;
    3889          13 :                         if (_array_size >= rc) {
    3890           9 :                                 _array_size -= rc;
    3891           9 :                         } else {
    3892           4 :                                 _array_size = 0;
    3893             :                         }
    3894          14 :                 } else if (rc < 0) {
    3895           0 :                         return rc;
    3896             :                 }
    3897          14 :         }
    3898             : 
    3899           8 :         return i;
    3900           8 : }
    3901             : 
    3902             : static const char *
    3903           0 : nvme_ctrlr_get_state_str(struct nvme_ctrlr *nvme_ctrlr)
    3904             : {
    3905           0 :         if (nvme_ctrlr->destruct) {
    3906           0 :                 return "deleting";
    3907           0 :         } else if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    3908           0 :                 return "failed";
    3909           0 :         } else if (nvme_ctrlr->resetting) {
    3910           0 :                 return "resetting";
    3911           0 :         } else if (nvme_ctrlr->reconnect_is_delayed > 0) {
    3912           0 :                 return "reconnect_is_delayed";
    3913           0 :         } else if (nvme_ctrlr->disabled) {
    3914           0 :                 return "disabled";
    3915             :         } else {
    3916           0 :                 return "enabled";
    3917             :         }
    3918           0 : }
    3919             : 
    3920             : void
    3921           0 : nvme_ctrlr_info_json(struct spdk_json_write_ctx *w, struct nvme_ctrlr *nvme_ctrlr)
    3922             : {
    3923             :         struct spdk_nvme_transport_id *trid;
    3924             :         const struct spdk_nvme_ctrlr_opts *opts;
    3925             :         const struct spdk_nvme_ctrlr_data *cdata;
    3926             :         struct nvme_path_id *path_id;
    3927             :         int32_t numa_id;
    3928             : 
    3929           0 :         spdk_json_write_object_begin(w);
    3930             : 
    3931           0 :         spdk_json_write_named_string(w, "state", nvme_ctrlr_get_state_str(nvme_ctrlr));
    3932             : 
    3933             : #ifdef SPDK_CONFIG_NVME_CUSE
    3934             :         size_t cuse_name_size = 128;
    3935             :         char cuse_name[cuse_name_size];
    3936             : 
    3937             :         int rc = spdk_nvme_cuse_get_ctrlr_name(nvme_ctrlr->ctrlr, cuse_name, &cuse_name_size);
    3938             :         if (rc == 0) {
    3939             :                 spdk_json_write_named_string(w, "cuse_device", cuse_name);
    3940             :         }
    3941             : #endif
    3942           0 :         trid = &nvme_ctrlr->active_path_id->trid;
    3943           0 :         spdk_json_write_named_object_begin(w, "trid");
    3944           0 :         nvme_bdev_dump_trid_json(trid, w);
    3945           0 :         spdk_json_write_object_end(w);
    3946             : 
    3947           0 :         path_id = TAILQ_NEXT(nvme_ctrlr->active_path_id, link);
    3948           0 :         if (path_id != NULL) {
    3949           0 :                 spdk_json_write_named_array_begin(w, "alternate_trids");
    3950           0 :                 do {
    3951           0 :                         trid = &path_id->trid;
    3952           0 :                         spdk_json_write_object_begin(w);
    3953           0 :                         nvme_bdev_dump_trid_json(trid, w);
    3954           0 :                         spdk_json_write_object_end(w);
    3955             : 
    3956           0 :                         path_id = TAILQ_NEXT(path_id, link);
    3957           0 :                 } while (path_id != NULL);
    3958           0 :                 spdk_json_write_array_end(w);
    3959           0 :         }
    3960             : 
    3961           0 :         cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    3962           0 :         spdk_json_write_named_uint16(w, "cntlid", cdata->cntlid);
    3963             : 
    3964           0 :         opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
    3965           0 :         spdk_json_write_named_object_begin(w, "host");
    3966           0 :         spdk_json_write_named_string(w, "nqn", opts->hostnqn);
    3967           0 :         spdk_json_write_named_string(w, "addr", opts->src_addr);
    3968           0 :         spdk_json_write_named_string(w, "svcid", opts->src_svcid);
    3969           0 :         spdk_json_write_object_end(w);
    3970             : 
    3971           0 :         numa_id = spdk_nvme_ctrlr_get_numa_id(nvme_ctrlr->ctrlr);
    3972           0 :         if (numa_id != SPDK_ENV_NUMA_ID_ANY) {
    3973           0 :                 spdk_json_write_named_uint32(w, "numa_id", numa_id);
    3974           0 :         }
    3975           0 :         spdk_json_write_object_end(w);
    3976           0 : }
    3977             : 
    3978             : static void
    3979           0 : nvme_namespace_info_json(struct spdk_json_write_ctx *w,
    3980             :                          struct nvme_ns *nvme_ns)
    3981             : {
    3982             :         struct spdk_nvme_ns *ns;
    3983             :         struct spdk_nvme_ctrlr *ctrlr;
    3984             :         const struct spdk_nvme_ctrlr_data *cdata;
    3985             :         const struct spdk_nvme_transport_id *trid;
    3986             :         union spdk_nvme_vs_register vs;
    3987             :         const struct spdk_nvme_ns_data *nsdata;
    3988             :         char buf[128];
    3989             : 
    3990           0 :         ns = nvme_ns->ns;
    3991           0 :         if (ns == NULL) {
    3992           0 :                 return;
    3993             :         }
    3994             : 
    3995           0 :         ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    3996             : 
    3997           0 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3998           0 :         trid = spdk_nvme_ctrlr_get_transport_id(ctrlr);
    3999           0 :         vs = spdk_nvme_ctrlr_get_regs_vs(ctrlr);
    4000             : 
    4001           0 :         spdk_json_write_object_begin(w);
    4002             : 
    4003           0 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    4004           0 :                 spdk_json_write_named_string(w, "pci_address", trid->traddr);
    4005           0 :         }
    4006             : 
    4007           0 :         spdk_json_write_named_object_begin(w, "trid");
    4008             : 
    4009           0 :         nvme_bdev_dump_trid_json(trid, w);
    4010             : 
    4011           0 :         spdk_json_write_object_end(w);
    4012             : 
    4013             : #ifdef SPDK_CONFIG_NVME_CUSE
    4014             :         size_t cuse_name_size = 128;
    4015             :         char cuse_name[cuse_name_size];
    4016             : 
    4017             :         int rc = spdk_nvme_cuse_get_ns_name(ctrlr, spdk_nvme_ns_get_id(ns),
    4018             :                                             cuse_name, &cuse_name_size);
    4019             :         if (rc == 0) {
    4020             :                 spdk_json_write_named_string(w, "cuse_device", cuse_name);
    4021             :         }
    4022             : #endif
    4023             : 
    4024           0 :         spdk_json_write_named_object_begin(w, "ctrlr_data");
    4025             : 
    4026           0 :         spdk_json_write_named_uint16(w, "cntlid", cdata->cntlid);
    4027             : 
    4028           0 :         spdk_json_write_named_string_fmt(w, "vendor_id", "0x%04x", cdata->vid);
    4029             : 
    4030           0 :         snprintf(buf, sizeof(cdata->mn) + 1, "%s", cdata->mn);
    4031           0 :         spdk_str_trim(buf);
    4032           0 :         spdk_json_write_named_string(w, "model_number", buf);
    4033             : 
    4034           0 :         snprintf(buf, sizeof(cdata->sn) + 1, "%s", cdata->sn);
    4035           0 :         spdk_str_trim(buf);
    4036           0 :         spdk_json_write_named_string(w, "serial_number", buf);
    4037             : 
    4038           0 :         snprintf(buf, sizeof(cdata->fr) + 1, "%s", cdata->fr);
    4039           0 :         spdk_str_trim(buf);
    4040           0 :         spdk_json_write_named_string(w, "firmware_revision", buf);
    4041             : 
    4042           0 :         if (cdata->subnqn[0] != '\0') {
    4043           0 :                 spdk_json_write_named_string(w, "subnqn", cdata->subnqn);
    4044           0 :         }
    4045             : 
    4046           0 :         spdk_json_write_named_object_begin(w, "oacs");
    4047             : 
    4048           0 :         spdk_json_write_named_uint32(w, "security", cdata->oacs.security);
    4049           0 :         spdk_json_write_named_uint32(w, "format", cdata->oacs.format);
    4050           0 :         spdk_json_write_named_uint32(w, "firmware", cdata->oacs.firmware);
    4051           0 :         spdk_json_write_named_uint32(w, "ns_manage", cdata->oacs.ns_manage);
    4052             : 
    4053           0 :         spdk_json_write_object_end(w);
    4054             : 
    4055           0 :         spdk_json_write_named_bool(w, "multi_ctrlr", cdata->cmic.multi_ctrlr);
    4056           0 :         spdk_json_write_named_bool(w, "ana_reporting", cdata->cmic.ana_reporting);
    4057             : 
    4058           0 :         spdk_json_write_object_end(w);
    4059             : 
    4060           0 :         spdk_json_write_named_object_begin(w, "vs");
    4061             : 
    4062           0 :         spdk_json_write_name(w, "nvme_version");
    4063           0 :         if (vs.bits.ter) {
    4064           0 :                 spdk_json_write_string_fmt(w, "%u.%u.%u", vs.bits.mjr, vs.bits.mnr, vs.bits.ter);
    4065           0 :         } else {
    4066           0 :                 spdk_json_write_string_fmt(w, "%u.%u", vs.bits.mjr, vs.bits.mnr);
    4067             :         }
    4068             : 
    4069           0 :         spdk_json_write_object_end(w);
    4070             : 
    4071           0 :         nsdata = spdk_nvme_ns_get_data(ns);
    4072             : 
    4073           0 :         spdk_json_write_named_object_begin(w, "ns_data");
    4074             : 
    4075           0 :         spdk_json_write_named_uint32(w, "id", spdk_nvme_ns_get_id(ns));
    4076             : 
    4077           0 :         if (cdata->cmic.ana_reporting) {
    4078           0 :                 spdk_json_write_named_string(w, "ana_state",
    4079           0 :                                              _nvme_ana_state_str(nvme_ns->ana_state));
    4080           0 :         }
    4081             : 
    4082           0 :         spdk_json_write_named_bool(w, "can_share", nsdata->nmic.can_share);
    4083             : 
    4084           0 :         spdk_json_write_object_end(w);
    4085             : 
    4086           0 :         if (cdata->oacs.security) {
    4087           0 :                 spdk_json_write_named_object_begin(w, "security");
    4088             : 
    4089           0 :                 spdk_json_write_named_bool(w, "opal", nvme_ns->bdev->opal);
    4090             : 
    4091           0 :                 spdk_json_write_object_end(w);
    4092           0 :         }
    4093             : 
    4094           0 :         spdk_json_write_object_end(w);
    4095           0 : }
    4096             : 
    4097             : static const char *
    4098           0 : nvme_bdev_get_mp_policy_str(struct nvme_bdev *nbdev)
    4099             : {
    4100           0 :         switch (nbdev->mp_policy) {
    4101             :         case BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE:
    4102           0 :                 return "active_passive";
    4103             :         case BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE:
    4104           0 :                 return "active_active";
    4105             :         default:
    4106           0 :                 assert(false);
    4107             :                 return "invalid";
    4108             :         }
    4109           0 : }
    4110             : 
    4111             : static const char *
    4112           0 : nvme_bdev_get_mp_selector_str(struct nvme_bdev *nbdev)
    4113             : {
    4114           0 :         switch (nbdev->mp_selector) {
    4115             :         case BDEV_NVME_MP_SELECTOR_ROUND_ROBIN:
    4116           0 :                 return "round_robin";
    4117             :         case BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH:
    4118           0 :                 return "queue_depth";
    4119             :         default:
    4120           0 :                 assert(false);
    4121             :                 return "invalid";
    4122             :         }
    4123           0 : }
    4124             : 
    4125             : static int
    4126           0 : bdev_nvme_dump_info_json(void *ctx, struct spdk_json_write_ctx *w)
    4127             : {
    4128           0 :         struct nvme_bdev *nvme_bdev = ctx;
    4129             :         struct nvme_ns *nvme_ns;
    4130             : 
    4131           0 :         pthread_mutex_lock(&nvme_bdev->mutex);
    4132           0 :         spdk_json_write_named_array_begin(w, "nvme");
    4133           0 :         TAILQ_FOREACH(nvme_ns, &nvme_bdev->nvme_ns_list, tailq) {
    4134           0 :                 nvme_namespace_info_json(w, nvme_ns);
    4135           0 :         }
    4136           0 :         spdk_json_write_array_end(w);
    4137           0 :         spdk_json_write_named_string(w, "mp_policy", nvme_bdev_get_mp_policy_str(nvme_bdev));
    4138           0 :         if (nvme_bdev->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    4139           0 :                 spdk_json_write_named_string(w, "selector", nvme_bdev_get_mp_selector_str(nvme_bdev));
    4140           0 :                 if (nvme_bdev->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    4141           0 :                         spdk_json_write_named_uint32(w, "rr_min_io", nvme_bdev->rr_min_io);
    4142           0 :                 }
    4143           0 :         }
    4144           0 :         pthread_mutex_unlock(&nvme_bdev->mutex);
    4145             : 
    4146           0 :         return 0;
    4147             : }
    4148             : 
    4149             : static void
    4150           0 : bdev_nvme_write_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    4151             : {
    4152             :         /* No config per bdev needed */
    4153           0 : }
    4154             : 
    4155             : static uint64_t
    4156           0 : bdev_nvme_get_spin_time(struct spdk_io_channel *ch)
    4157             : {
    4158           0 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
    4159             :         struct nvme_io_path *io_path;
    4160             :         struct nvme_poll_group *group;
    4161           0 :         uint64_t spin_time = 0;
    4162             : 
    4163           0 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    4164           0 :                 group = io_path->qpair->group;
    4165             : 
    4166           0 :                 if (!group || !group->collect_spin_stat) {
    4167           0 :                         continue;
    4168             :                 }
    4169             : 
    4170           0 :                 if (group->end_ticks != 0) {
    4171           0 :                         group->spin_ticks += (group->end_ticks - group->start_ticks);
    4172           0 :                         group->end_ticks = 0;
    4173           0 :                 }
    4174             : 
    4175           0 :                 spin_time += group->spin_ticks;
    4176           0 :                 group->start_ticks = 0;
    4177           0 :                 group->spin_ticks = 0;
    4178           0 :         }
    4179             : 
    4180           0 :         return (spin_time * 1000000ULL) / spdk_get_ticks_hz();
    4181             : }
    4182             : 
    4183             : static void
    4184           0 : bdev_nvme_reset_device_stat(void *ctx)
    4185             : {
    4186           0 :         struct nvme_bdev *nbdev = ctx;
    4187             : 
    4188           0 :         if (nbdev->err_stat != NULL) {
    4189           0 :                 memset(nbdev->err_stat, 0, sizeof(struct nvme_error_stat));
    4190           0 :         }
    4191           0 : }
    4192             : 
    4193             : /* JSON string should be lowercases and underscore delimited string. */
    4194             : static void
    4195           0 : bdev_nvme_format_nvme_status(char *dst, const char *src)
    4196             : {
    4197             :         char tmp[256];
    4198             : 
    4199           0 :         spdk_strcpy_replace(dst, 256, src, " - ", "_");
    4200           0 :         spdk_strcpy_replace(tmp, 256, dst, "-", "_");
    4201           0 :         spdk_strcpy_replace(dst, 256, tmp, " ", "_");
    4202           0 :         spdk_strlwr(dst);
    4203           0 : }
    4204             : 
    4205             : static void
    4206           0 : bdev_nvme_dump_device_stat_json(void *ctx, struct spdk_json_write_ctx *w)
    4207             : {
    4208           0 :         struct nvme_bdev *nbdev = ctx;
    4209           0 :         struct spdk_nvme_status status = {};
    4210             :         uint16_t sct, sc;
    4211             :         char status_json[256];
    4212             :         const char *status_str;
    4213             : 
    4214           0 :         if (nbdev->err_stat == NULL) {
    4215           0 :                 return;
    4216             :         }
    4217             : 
    4218           0 :         spdk_json_write_named_object_begin(w, "nvme_error");
    4219             : 
    4220           0 :         spdk_json_write_named_object_begin(w, "status_type");
    4221           0 :         for (sct = 0; sct < 8; sct++) {
    4222           0 :                 if (nbdev->err_stat->status_type[sct] == 0) {
    4223           0 :                         continue;
    4224             :                 }
    4225           0 :                 status.sct = sct;
    4226             : 
    4227           0 :                 status_str = spdk_nvme_cpl_get_status_type_string(&status);
    4228           0 :                 assert(status_str != NULL);
    4229           0 :                 bdev_nvme_format_nvme_status(status_json, status_str);
    4230             : 
    4231           0 :                 spdk_json_write_named_uint32(w, status_json, nbdev->err_stat->status_type[sct]);
    4232           0 :         }
    4233           0 :         spdk_json_write_object_end(w);
    4234             : 
    4235           0 :         spdk_json_write_named_object_begin(w, "status_code");
    4236           0 :         for (sct = 0; sct < 4; sct++) {
    4237           0 :                 status.sct = sct;
    4238           0 :                 for (sc = 0; sc < 256; sc++) {
    4239           0 :                         if (nbdev->err_stat->status[sct][sc] == 0) {
    4240           0 :                                 continue;
    4241             :                         }
    4242           0 :                         status.sc = sc;
    4243             : 
    4244           0 :                         status_str = spdk_nvme_cpl_get_status_string(&status);
    4245           0 :                         assert(status_str != NULL);
    4246           0 :                         bdev_nvme_format_nvme_status(status_json, status_str);
    4247             : 
    4248           0 :                         spdk_json_write_named_uint32(w, status_json, nbdev->err_stat->status[sct][sc]);
    4249           0 :                 }
    4250           0 :         }
    4251           0 :         spdk_json_write_object_end(w);
    4252             : 
    4253           0 :         spdk_json_write_object_end(w);
    4254           0 : }
    4255             : 
    4256             : static bool
    4257           0 : bdev_nvme_accel_sequence_supported(void *ctx, enum spdk_bdev_io_type type)
    4258             : {
    4259           0 :         struct nvme_bdev *nbdev = ctx;
    4260             :         struct nvme_ns *nvme_ns;
    4261             :         struct spdk_nvme_ctrlr *ctrlr;
    4262             : 
    4263           0 :         if (!g_opts.allow_accel_sequence) {
    4264           0 :                 return false;
    4265             :         }
    4266             : 
    4267           0 :         switch (type) {
    4268             :         case SPDK_BDEV_IO_TYPE_WRITE:
    4269             :         case SPDK_BDEV_IO_TYPE_READ:
    4270           0 :                 break;
    4271             :         default:
    4272           0 :                 return false;
    4273             :         }
    4274             : 
    4275           0 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    4276           0 :         assert(nvme_ns != NULL);
    4277             : 
    4278           0 :         ctrlr = nvme_ns->ctrlr->ctrlr;
    4279           0 :         assert(ctrlr != NULL);
    4280             : 
    4281           0 :         return spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_ACCEL_SEQUENCE_SUPPORTED;
    4282           0 : }
    4283             : 
    4284             : static const struct spdk_bdev_fn_table nvmelib_fn_table = {
    4285             :         .destruct                       = bdev_nvme_destruct,
    4286             :         .submit_request                 = bdev_nvme_submit_request,
    4287             :         .io_type_supported              = bdev_nvme_io_type_supported,
    4288             :         .get_io_channel                 = bdev_nvme_get_io_channel,
    4289             :         .dump_info_json                 = bdev_nvme_dump_info_json,
    4290             :         .write_config_json              = bdev_nvme_write_config_json,
    4291             :         .get_spin_time                  = bdev_nvme_get_spin_time,
    4292             :         .get_module_ctx                 = bdev_nvme_get_module_ctx,
    4293             :         .get_memory_domains             = bdev_nvme_get_memory_domains,
    4294             :         .accel_sequence_supported       = bdev_nvme_accel_sequence_supported,
    4295             :         .reset_device_stat              = bdev_nvme_reset_device_stat,
    4296             :         .dump_device_stat_json          = bdev_nvme_dump_device_stat_json,
    4297             : };
    4298             : 
    4299             : typedef int (*bdev_nvme_parse_ana_log_page_cb)(
    4300             :         const struct spdk_nvme_ana_group_descriptor *desc, void *cb_arg);
    4301             : 
    4302             : static int
    4303          42 : bdev_nvme_parse_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
    4304             :                              bdev_nvme_parse_ana_log_page_cb cb_fn, void *cb_arg)
    4305             : {
    4306             :         struct spdk_nvme_ana_group_descriptor *copied_desc;
    4307             :         uint8_t *orig_desc;
    4308             :         uint32_t i, desc_size, copy_len;
    4309          42 :         int rc = 0;
    4310             : 
    4311          42 :         if (nvme_ctrlr->ana_log_page == NULL) {
    4312           0 :                 return -EINVAL;
    4313             :         }
    4314             : 
    4315          42 :         copied_desc = nvme_ctrlr->copied_ana_desc;
    4316             : 
    4317          42 :         orig_desc = (uint8_t *)nvme_ctrlr->ana_log_page + sizeof(struct spdk_nvme_ana_page);
    4318          42 :         copy_len = nvme_ctrlr->max_ana_log_page_size - sizeof(struct spdk_nvme_ana_page);
    4319             : 
    4320          72 :         for (i = 0; i < nvme_ctrlr->ana_log_page->num_ana_group_desc; i++) {
    4321          67 :                 memcpy(copied_desc, orig_desc, copy_len);
    4322             : 
    4323          67 :                 rc = cb_fn(copied_desc, cb_arg);
    4324          67 :                 if (rc != 0) {
    4325          37 :                         break;
    4326             :                 }
    4327             : 
    4328          30 :                 desc_size = sizeof(struct spdk_nvme_ana_group_descriptor) +
    4329          30 :                             copied_desc->num_of_nsid * sizeof(uint32_t);
    4330          30 :                 orig_desc += desc_size;
    4331          30 :                 copy_len -= desc_size;
    4332          30 :         }
    4333             : 
    4334          42 :         return rc;
    4335          42 : }
    4336             : 
    4337             : static int
    4338           5 : nvme_ns_ana_transition_timedout(void *ctx)
    4339             : {
    4340           5 :         struct nvme_ns *nvme_ns = ctx;
    4341             : 
    4342           5 :         spdk_poller_unregister(&nvme_ns->anatt_timer);
    4343           5 :         nvme_ns->ana_transition_timedout = true;
    4344             : 
    4345           5 :         return SPDK_POLLER_BUSY;
    4346             : }
    4347             : 
    4348             : static void
    4349          46 : _nvme_ns_set_ana_state(struct nvme_ns *nvme_ns,
    4350             :                        const struct spdk_nvme_ana_group_descriptor *desc)
    4351             : {
    4352             :         const struct spdk_nvme_ctrlr_data *cdata;
    4353             : 
    4354          46 :         nvme_ns->ana_group_id = desc->ana_group_id;
    4355          46 :         nvme_ns->ana_state = desc->ana_state;
    4356          46 :         nvme_ns->ana_state_updating = false;
    4357             : 
    4358          46 :         switch (nvme_ns->ana_state) {
    4359             :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    4360             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    4361          39 :                 nvme_ns->ana_transition_timedout = false;
    4362          39 :                 spdk_poller_unregister(&nvme_ns->anatt_timer);
    4363          39 :                 break;
    4364             : 
    4365             :         case SPDK_NVME_ANA_INACCESSIBLE_STATE:
    4366             :         case SPDK_NVME_ANA_CHANGE_STATE:
    4367           6 :                 if (nvme_ns->anatt_timer != NULL) {
    4368           1 :                         break;
    4369             :                 }
    4370             : 
    4371           5 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ns->ctrlr->ctrlr);
    4372           5 :                 nvme_ns->anatt_timer = SPDK_POLLER_REGISTER(nvme_ns_ana_transition_timedout,
    4373             :                                        nvme_ns,
    4374             :                                        cdata->anatt * SPDK_SEC_TO_USEC);
    4375           5 :                 break;
    4376             :         default:
    4377           1 :                 break;
    4378             :         }
    4379          46 : }
    4380             : 
    4381             : static int
    4382          60 : nvme_ns_set_ana_state(const struct spdk_nvme_ana_group_descriptor *desc, void *cb_arg)
    4383             : {
    4384          60 :         struct nvme_ns *nvme_ns = cb_arg;
    4385             :         uint32_t i;
    4386             : 
    4387          60 :         assert(nvme_ns->ns != NULL);
    4388             : 
    4389          82 :         for (i = 0; i < desc->num_of_nsid; i++) {
    4390          59 :                 if (desc->nsid[i] != spdk_nvme_ns_get_id(nvme_ns->ns)) {
    4391          22 :                         continue;
    4392             :                 }
    4393             : 
    4394          37 :                 _nvme_ns_set_ana_state(nvme_ns, desc);
    4395          37 :                 return 1;
    4396             :         }
    4397             : 
    4398          23 :         return 0;
    4399          60 : }
    4400             : 
    4401             : static int
    4402           5 : nvme_generate_uuid(const char *sn, uint32_t nsid, struct spdk_uuid *uuid)
    4403             : {
    4404           5 :         int rc = 0;
    4405             :         struct spdk_uuid new_uuid, namespace_uuid;
    4406           5 :         char merged_str[SPDK_NVME_CTRLR_SN_LEN + NSID_STR_LEN + 1] = {'\0'};
    4407             :         /* This namespace UUID was generated using uuid_generate() method. */
    4408           5 :         const char *namespace_str = {"edaed2de-24bc-4b07-b559-f47ecbe730fd"};
    4409             :         int size;
    4410             : 
    4411           5 :         assert(strlen(sn) <= SPDK_NVME_CTRLR_SN_LEN);
    4412             : 
    4413           5 :         spdk_uuid_set_null(&new_uuid);
    4414           5 :         spdk_uuid_set_null(&namespace_uuid);
    4415             : 
    4416           5 :         size = snprintf(merged_str, sizeof(merged_str), "%s%"PRIu32, sn, nsid);
    4417           5 :         if (size <= 0 || (unsigned long)size >= sizeof(merged_str)) {
    4418           0 :                 return -EINVAL;
    4419             :         }
    4420             : 
    4421           5 :         spdk_uuid_parse(&namespace_uuid, namespace_str);
    4422             : 
    4423           5 :         rc = spdk_uuid_generate_sha1(&new_uuid, &namespace_uuid, merged_str, size);
    4424           5 :         if (rc == 0) {
    4425           5 :                 memcpy(uuid, &new_uuid, sizeof(struct spdk_uuid));
    4426           5 :         }
    4427             : 
    4428           5 :         return rc;
    4429           5 : }
    4430             : 
    4431             : static int
    4432          39 : nvme_disk_create(struct spdk_bdev *disk, const char *base_name,
    4433             :                  struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_ns *ns,
    4434             :                  struct spdk_bdev_nvme_ctrlr_opts *bdev_opts, void *ctx)
    4435             : {
    4436             :         const struct spdk_uuid          *uuid;
    4437             :         const uint8_t *nguid;
    4438             :         const struct spdk_nvme_ctrlr_data *cdata;
    4439             :         const struct spdk_nvme_ns_data  *nsdata;
    4440             :         const struct spdk_nvme_ctrlr_opts *opts;
    4441             :         enum spdk_nvme_csi              csi;
    4442             :         uint32_t atomic_bs, phys_bs, bs;
    4443          39 :         char sn_tmp[SPDK_NVME_CTRLR_SN_LEN + 1] = {'\0'};
    4444             :         int rc;
    4445             : 
    4446          39 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    4447          39 :         csi = spdk_nvme_ns_get_csi(ns);
    4448          39 :         opts = spdk_nvme_ctrlr_get_opts(ctrlr);
    4449             : 
    4450          39 :         switch (csi) {
    4451             :         case SPDK_NVME_CSI_NVM:
    4452          39 :                 disk->product_name = "NVMe disk";
    4453          39 :                 break;
    4454             :         case SPDK_NVME_CSI_ZNS:
    4455           0 :                 disk->product_name = "NVMe ZNS disk";
    4456           0 :                 disk->zoned = true;
    4457           0 :                 disk->zone_size = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    4458           0 :                 disk->max_zone_append_size = spdk_nvme_zns_ctrlr_get_max_zone_append_size(ctrlr) /
    4459           0 :                                              spdk_nvme_ns_get_extended_sector_size(ns);
    4460           0 :                 disk->max_open_zones = spdk_nvme_zns_ns_get_max_open_zones(ns);
    4461           0 :                 disk->max_active_zones = spdk_nvme_zns_ns_get_max_active_zones(ns);
    4462           0 :                 break;
    4463             :         default:
    4464           0 :                 if (bdev_opts->allow_unrecognized_csi) {
    4465           0 :                         disk->product_name = "NVMe Passthrough disk";
    4466           0 :                         break;
    4467             :                 }
    4468           0 :                 SPDK_ERRLOG("unsupported CSI: %u\n", csi);
    4469           0 :                 return -ENOTSUP;
    4470             :         }
    4471             : 
    4472          39 :         nguid = spdk_nvme_ns_get_nguid(ns);
    4473          39 :         if (!nguid) {
    4474          39 :                 uuid = spdk_nvme_ns_get_uuid(ns);
    4475          39 :                 if (uuid) {
    4476          12 :                         disk->uuid = *uuid;
    4477          39 :                 } else if (g_opts.generate_uuids) {
    4478           0 :                         spdk_strcpy_pad(sn_tmp, cdata->sn, SPDK_NVME_CTRLR_SN_LEN, '\0');
    4479           0 :                         rc = nvme_generate_uuid(sn_tmp, spdk_nvme_ns_get_id(ns), &disk->uuid);
    4480           0 :                         if (rc < 0) {
    4481           0 :                                 SPDK_ERRLOG("UUID generation failed (%s)\n", spdk_strerror(-rc));
    4482           0 :                                 return rc;
    4483             :                         }
    4484           0 :                 }
    4485          39 :         } else {
    4486           0 :                 memcpy(&disk->uuid, nguid, sizeof(disk->uuid));
    4487             :         }
    4488             : 
    4489          39 :         disk->name = spdk_sprintf_alloc("%sn%d", base_name, spdk_nvme_ns_get_id(ns));
    4490          39 :         if (!disk->name) {
    4491           0 :                 return -ENOMEM;
    4492             :         }
    4493             : 
    4494          39 :         disk->write_cache = 0;
    4495          39 :         if (cdata->vwc.present) {
    4496             :                 /* Enable if the Volatile Write Cache exists */
    4497           0 :                 disk->write_cache = 1;
    4498           0 :         }
    4499          39 :         if (cdata->oncs.write_zeroes) {
    4500           0 :                 disk->max_write_zeroes = UINT16_MAX + 1;
    4501           0 :         }
    4502          39 :         disk->blocklen = spdk_nvme_ns_get_extended_sector_size(ns);
    4503          39 :         disk->blockcnt = spdk_nvme_ns_get_num_sectors(ns);
    4504          39 :         disk->max_segment_size = spdk_nvme_ctrlr_get_max_xfer_size(ctrlr);
    4505          39 :         disk->ctratt.raw = cdata->ctratt.raw;
    4506          39 :         disk->nsid = spdk_nvme_ns_get_id(ns);
    4507             :         /* NVMe driver will split one request into multiple requests
    4508             :          * based on MDTS and stripe boundary, the bdev layer will use
    4509             :          * max_segment_size and max_num_segments to split one big IO
    4510             :          * into multiple requests, then small request can't run out
    4511             :          * of NVMe internal requests data structure.
    4512             :          */
    4513          39 :         if (opts && opts->io_queue_requests) {
    4514           0 :                 disk->max_num_segments = opts->io_queue_requests / 2;
    4515           0 :         }
    4516          39 :         if (spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_SGL_SUPPORTED) {
    4517             :                 /* The nvme driver will try to split I/O that have too many
    4518             :                  * SGEs, but it doesn't work if that last SGE doesn't end on
    4519             :                  * an aggregate total that is block aligned. The bdev layer has
    4520             :                  * a more robust splitting framework, so use that instead for
    4521             :                  * this case. (See issue #3269.)
    4522             :                  */
    4523           0 :                 uint16_t max_sges = spdk_nvme_ctrlr_get_max_sges(ctrlr);
    4524             : 
    4525           0 :                 if (disk->max_num_segments == 0) {
    4526           0 :                         disk->max_num_segments = max_sges;
    4527           0 :                 } else {
    4528           0 :                         disk->max_num_segments = spdk_min(disk->max_num_segments, max_sges);
    4529             :                 }
    4530           0 :         }
    4531          39 :         disk->optimal_io_boundary = spdk_nvme_ns_get_optimal_io_boundary(ns);
    4532             : 
    4533          39 :         nsdata = spdk_nvme_ns_get_data(ns);
    4534          39 :         bs = spdk_nvme_ns_get_sector_size(ns);
    4535          39 :         atomic_bs = bs;
    4536          39 :         phys_bs = bs;
    4537          39 :         if (nsdata->nabo == 0) {
    4538          39 :                 if (nsdata->nsfeat.ns_atomic_write_unit && nsdata->nawupf) {
    4539           0 :                         atomic_bs = bs * (1 + nsdata->nawupf);
    4540           0 :                 } else {
    4541          39 :                         atomic_bs = bs * (1 + cdata->awupf);
    4542             :                 }
    4543          39 :         }
    4544          39 :         if (nsdata->nsfeat.optperf) {
    4545           0 :                 phys_bs = bs * (1 + nsdata->npwg);
    4546           0 :         }
    4547          39 :         disk->phys_blocklen = spdk_min(phys_bs, atomic_bs);
    4548             : 
    4549          39 :         disk->md_len = spdk_nvme_ns_get_md_size(ns);
    4550          39 :         if (disk->md_len != 0) {
    4551           0 :                 disk->md_interleave = nsdata->flbas.extended;
    4552           0 :                 disk->dif_type = (enum spdk_dif_type)spdk_nvme_ns_get_pi_type(ns);
    4553           0 :                 if (disk->dif_type != SPDK_DIF_DISABLE) {
    4554           0 :                         disk->dif_is_head_of_md = nsdata->dps.md_start;
    4555           0 :                         disk->dif_check_flags = bdev_opts->prchk_flags;
    4556           0 :                         disk->dif_pi_format = (enum spdk_dif_pi_format)spdk_nvme_ns_get_pi_format(ns);
    4557           0 :                 }
    4558           0 :         }
    4559             : 
    4560          39 :         if (!(spdk_nvme_ctrlr_get_flags(ctrlr) &
    4561             :               SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED)) {
    4562          39 :                 disk->acwu = 0;
    4563          39 :         } else if (nsdata->nsfeat.ns_atomic_write_unit) {
    4564           0 :                 disk->acwu = nsdata->nacwu + 1; /* 0-based */
    4565           0 :         } else {
    4566           0 :                 disk->acwu = cdata->acwu + 1; /* 0-based */
    4567             :         }
    4568             : 
    4569          39 :         if (cdata->oncs.copy) {
    4570             :                 /* For now bdev interface allows only single segment copy */
    4571           0 :                 disk->max_copy = nsdata->mssrl;
    4572           0 :         }
    4573             : 
    4574          39 :         disk->ctxt = ctx;
    4575          39 :         disk->fn_table = &nvmelib_fn_table;
    4576          39 :         disk->module = &nvme_if;
    4577             : 
    4578          39 :         disk->numa.id_valid = 1;
    4579          39 :         disk->numa.id = spdk_nvme_ctrlr_get_numa_id(ctrlr);
    4580             : 
    4581          39 :         return 0;
    4582          39 : }
    4583             : 
    4584             : static struct nvme_bdev *
    4585          39 : nvme_bdev_alloc(void)
    4586             : {
    4587             :         struct nvme_bdev *bdev;
    4588             :         int rc;
    4589             : 
    4590          39 :         bdev = calloc(1, sizeof(*bdev));
    4591          39 :         if (!bdev) {
    4592           0 :                 SPDK_ERRLOG("bdev calloc() failed\n");
    4593           0 :                 return NULL;
    4594             :         }
    4595             : 
    4596          39 :         if (g_opts.nvme_error_stat) {
    4597           0 :                 bdev->err_stat = calloc(1, sizeof(struct nvme_error_stat));
    4598           0 :                 if (!bdev->err_stat) {
    4599           0 :                         SPDK_ERRLOG("err_stat calloc() failed\n");
    4600           0 :                         free(bdev);
    4601           0 :                         return NULL;
    4602             :                 }
    4603           0 :         }
    4604             : 
    4605          39 :         rc = pthread_mutex_init(&bdev->mutex, NULL);
    4606          39 :         if (rc != 0) {
    4607           0 :                 free(bdev->err_stat);
    4608           0 :                 free(bdev);
    4609           0 :                 return NULL;
    4610             :         }
    4611             : 
    4612          39 :         bdev->ref = 1;
    4613          39 :         bdev->mp_policy = BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE;
    4614          39 :         bdev->mp_selector = BDEV_NVME_MP_SELECTOR_ROUND_ROBIN;
    4615          39 :         bdev->rr_min_io = UINT32_MAX;
    4616          39 :         TAILQ_INIT(&bdev->nvme_ns_list);
    4617             : 
    4618          39 :         return bdev;
    4619          39 : }
    4620             : 
    4621             : static int
    4622          39 : nvme_bdev_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4623             : {
    4624             :         struct nvme_bdev *bdev;
    4625          39 :         struct nvme_bdev_ctrlr *nbdev_ctrlr = nvme_ctrlr->nbdev_ctrlr;
    4626             :         int rc;
    4627             : 
    4628          39 :         bdev = nvme_bdev_alloc();
    4629          39 :         if (bdev == NULL) {
    4630           0 :                 SPDK_ERRLOG("Failed to allocate NVMe bdev\n");
    4631           0 :                 return -ENOMEM;
    4632             :         }
    4633             : 
    4634          39 :         bdev->opal = nvme_ctrlr->opal_dev != NULL;
    4635             : 
    4636          78 :         rc = nvme_disk_create(&bdev->disk, nbdev_ctrlr->name, nvme_ctrlr->ctrlr,
    4637          39 :                               nvme_ns->ns, &nvme_ctrlr->opts, bdev);
    4638          39 :         if (rc != 0) {
    4639           0 :                 SPDK_ERRLOG("Failed to create NVMe disk\n");
    4640           0 :                 nvme_bdev_free(bdev);
    4641           0 :                 return rc;
    4642             :         }
    4643             : 
    4644          78 :         spdk_io_device_register(bdev,
    4645             :                                 bdev_nvme_create_bdev_channel_cb,
    4646             :                                 bdev_nvme_destroy_bdev_channel_cb,
    4647             :                                 sizeof(struct nvme_bdev_channel),
    4648          39 :                                 bdev->disk.name);
    4649             : 
    4650          39 :         nvme_ns->bdev = bdev;
    4651          39 :         bdev->nsid = nvme_ns->id;
    4652          39 :         TAILQ_INSERT_TAIL(&bdev->nvme_ns_list, nvme_ns, tailq);
    4653             : 
    4654          39 :         bdev->nbdev_ctrlr = nbdev_ctrlr;
    4655          39 :         TAILQ_INSERT_TAIL(&nbdev_ctrlr->bdevs, bdev, tailq);
    4656             : 
    4657          39 :         rc = spdk_bdev_register(&bdev->disk);
    4658          39 :         if (rc != 0) {
    4659           1 :                 SPDK_ERRLOG("spdk_bdev_register() failed\n");
    4660           1 :                 spdk_io_device_unregister(bdev, NULL);
    4661           1 :                 nvme_ns->bdev = NULL;
    4662           1 :                 TAILQ_REMOVE(&nbdev_ctrlr->bdevs, bdev, tailq);
    4663           1 :                 nvme_bdev_free(bdev);
    4664           1 :                 return rc;
    4665             :         }
    4666             : 
    4667          38 :         return 0;
    4668          39 : }
    4669             : 
    4670             : static bool
    4671          23 : bdev_nvme_compare_ns(struct spdk_nvme_ns *ns1, struct spdk_nvme_ns *ns2)
    4672             : {
    4673             :         const struct spdk_nvme_ns_data *nsdata1, *nsdata2;
    4674             :         const struct spdk_uuid *uuid1, *uuid2;
    4675             : 
    4676          23 :         nsdata1 = spdk_nvme_ns_get_data(ns1);
    4677          23 :         nsdata2 = spdk_nvme_ns_get_data(ns2);
    4678          23 :         uuid1 = spdk_nvme_ns_get_uuid(ns1);
    4679          23 :         uuid2 = spdk_nvme_ns_get_uuid(ns2);
    4680             : 
    4681          71 :         return memcmp(nsdata1->nguid, nsdata2->nguid, sizeof(nsdata1->nguid)) == 0 &&
    4682          22 :                nsdata1->eui64 == nsdata2->eui64 &&
    4683          21 :                ((uuid1 == NULL && uuid2 == NULL) ||
    4684          29 :                 (uuid1 != NULL && uuid2 != NULL && spdk_uuid_compare(uuid1, uuid2) == 0)) &&
    4685          18 :                spdk_nvme_ns_get_csi(ns1) == spdk_nvme_ns_get_csi(ns2);
    4686             : }
    4687             : 
    4688             : static bool
    4689           0 : hotplug_probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    4690             :                  struct spdk_nvme_ctrlr_opts *opts)
    4691             : {
    4692             :         struct nvme_probe_skip_entry *entry;
    4693             : 
    4694           0 :         TAILQ_FOREACH(entry, &g_skipped_nvme_ctrlrs, tailq) {
    4695           0 :                 if (spdk_nvme_transport_id_compare(trid, &entry->trid) == 0) {
    4696           0 :                         return false;
    4697             :                 }
    4698           0 :         }
    4699             : 
    4700           0 :         opts->arbitration_burst = (uint8_t)g_opts.arbitration_burst;
    4701           0 :         opts->low_priority_weight = (uint8_t)g_opts.low_priority_weight;
    4702           0 :         opts->medium_priority_weight = (uint8_t)g_opts.medium_priority_weight;
    4703           0 :         opts->high_priority_weight = (uint8_t)g_opts.high_priority_weight;
    4704           0 :         opts->disable_read_ana_log_page = true;
    4705             : 
    4706           0 :         SPDK_DEBUGLOG(bdev_nvme, "Attaching to %s\n", trid->traddr);
    4707             : 
    4708           0 :         return true;
    4709           0 : }
    4710             : 
    4711             : static void
    4712           0 : nvme_abort_cpl(void *ctx, const struct spdk_nvme_cpl *cpl)
    4713             : {
    4714           0 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    4715             : 
    4716           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    4717           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr, "Abort failed. Resetting controller. sc is %u, sct is %u.\n",
    4718             :                                    cpl->status.sc, cpl->status.sct);
    4719           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4720           0 :         } else if (cpl->cdw0 & 0x1) {
    4721           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr, "Specified command could not be aborted.\n");
    4722           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4723           0 :         }
    4724           0 : }
    4725             : 
    4726             : static void
    4727           0 : timeout_cb(void *cb_arg, struct spdk_nvme_ctrlr *ctrlr,
    4728             :            struct spdk_nvme_qpair *qpair, uint16_t cid)
    4729             : {
    4730           0 :         struct nvme_ctrlr *nvme_ctrlr = cb_arg;
    4731             :         union spdk_nvme_csts_register csts;
    4732             :         int rc;
    4733             : 
    4734           0 :         assert(nvme_ctrlr->ctrlr == ctrlr);
    4735             : 
    4736           0 :         NVME_CTRLR_WARNLOG(nvme_ctrlr, "Warning: Detected a timeout. ctrlr=%p qpair=%p cid=%u\n",
    4737             :                            ctrlr, qpair, cid);
    4738             : 
    4739             :         /* Only try to read CSTS if it's a PCIe controller or we have a timeout on an I/O
    4740             :          * queue.  (Note: qpair == NULL when there's an admin cmd timeout.)  Otherwise we
    4741             :          * would submit another fabrics cmd on the admin queue to read CSTS and check for its
    4742             :          * completion recursively.
    4743             :          */
    4744           0 :         if (nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE || qpair != NULL) {
    4745           0 :                 csts = spdk_nvme_ctrlr_get_regs_csts(ctrlr);
    4746           0 :                 if (csts.bits.cfs) {
    4747           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Controller Fatal Status, reset required\n");
    4748           0 :                         bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4749           0 :                         return;
    4750             :                 }
    4751           0 :         }
    4752             : 
    4753           0 :         switch (g_opts.action_on_timeout) {
    4754             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_ABORT:
    4755           0 :                 if (qpair) {
    4756             :                         /* Don't send abort to ctrlr when ctrlr is not available. */
    4757           0 :                         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4758           0 :                         if (!nvme_ctrlr_is_available(nvme_ctrlr)) {
    4759           0 :                                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4760           0 :                                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Quit abort. Ctrlr is not available.\n");
    4761           0 :                                 return;
    4762             :                         }
    4763           0 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4764             : 
    4765           0 :                         rc = spdk_nvme_ctrlr_cmd_abort(ctrlr, qpair, cid,
    4766           0 :                                                        nvme_abort_cpl, nvme_ctrlr);
    4767           0 :                         if (rc == 0) {
    4768           0 :                                 return;
    4769             :                         }
    4770             : 
    4771           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Unable to send abort. Resetting, rc is %d.\n", rc);
    4772           0 :                 }
    4773             : 
    4774             :         /* FALLTHROUGH */
    4775             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET:
    4776           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4777           0 :                 break;
    4778             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE:
    4779           0 :                 NVME_CTRLR_DEBUGLOG(nvme_ctrlr, "No action for nvme controller timeout.\n");
    4780           0 :                 break;
    4781             :         default:
    4782           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "An invalid timeout action value is found.\n");
    4783           0 :                 break;
    4784             :         }
    4785           0 : }
    4786             : 
    4787             : static struct nvme_ns *
    4788          52 : nvme_ns_alloc(void)
    4789             : {
    4790             :         struct nvme_ns *nvme_ns;
    4791             : 
    4792          52 :         nvme_ns = calloc(1, sizeof(struct nvme_ns));
    4793          52 :         if (nvme_ns == NULL) {
    4794           0 :                 return NULL;
    4795             :         }
    4796             : 
    4797          52 :         if (g_opts.io_path_stat) {
    4798           0 :                 nvme_ns->stat = calloc(1, sizeof(struct spdk_bdev_io_stat));
    4799           0 :                 if (nvme_ns->stat == NULL) {
    4800           0 :                         free(nvme_ns);
    4801           0 :                         return NULL;
    4802             :                 }
    4803           0 :                 spdk_bdev_reset_io_stat(nvme_ns->stat, SPDK_BDEV_RESET_STAT_MAXMIN);
    4804           0 :         }
    4805             : 
    4806          52 :         return nvme_ns;
    4807          52 : }
    4808             : 
    4809             : static void
    4810          52 : nvme_ns_free(struct nvme_ns *nvme_ns)
    4811             : {
    4812          52 :         free(nvme_ns->stat);
    4813          52 :         free(nvme_ns);
    4814          52 : }
    4815             : 
    4816             : static void
    4817          52 : nvme_ctrlr_populate_namespace_done(struct nvme_ns *nvme_ns, int rc)
    4818             : {
    4819          52 :         struct nvme_ctrlr *nvme_ctrlr = nvme_ns->ctrlr;
    4820          52 :         struct nvme_async_probe_ctx *ctx = nvme_ns->probe_ctx;
    4821             : 
    4822          52 :         if (rc == 0) {
    4823          50 :                 nvme_ns->probe_ctx = NULL;
    4824          50 :                 nvme_ctrlr_get_ref(nvme_ctrlr);
    4825          50 :         } else {
    4826           2 :                 RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4827           2 :                 nvme_ns_free(nvme_ns);
    4828             :         }
    4829             : 
    4830          52 :         if (ctx) {
    4831          51 :                 ctx->populates_in_progress--;
    4832          51 :                 if (ctx->populates_in_progress == 0) {
    4833          12 :                         nvme_ctrlr_populate_namespaces_done(nvme_ctrlr, ctx);
    4834          12 :                 }
    4835          51 :         }
    4836          52 : }
    4837             : 
    4838             : static void
    4839           2 : bdev_nvme_add_io_path(struct nvme_bdev_channel_iter *i,
    4840             :                       struct nvme_bdev *nbdev,
    4841             :                       struct nvme_bdev_channel *nbdev_ch, void *ctx)
    4842             : {
    4843           2 :         struct nvme_ns *nvme_ns = ctx;
    4844             :         int rc;
    4845             : 
    4846           2 :         rc = _bdev_nvme_add_io_path(nbdev_ch, nvme_ns);
    4847           2 :         if (rc != 0) {
    4848           0 :                 SPDK_ERRLOG("Failed to add I/O path to bdev_channel dynamically.\n");
    4849           0 :         }
    4850             : 
    4851           2 :         nvme_bdev_for_each_channel_continue(i, rc);
    4852           2 : }
    4853             : 
    4854             : static void
    4855           2 : bdev_nvme_delete_io_path(struct nvme_bdev_channel_iter *i,
    4856             :                          struct nvme_bdev *nbdev,
    4857             :                          struct nvme_bdev_channel *nbdev_ch, void *ctx)
    4858             : {
    4859           2 :         struct nvme_ns *nvme_ns = ctx;
    4860             :         struct nvme_io_path *io_path;
    4861             : 
    4862           2 :         io_path = _bdev_nvme_get_io_path(nbdev_ch, nvme_ns);
    4863           2 :         if (io_path != NULL) {
    4864           2 :                 _bdev_nvme_delete_io_path(nbdev_ch, io_path);
    4865           2 :         }
    4866             : 
    4867           2 :         nvme_bdev_for_each_channel_continue(i, 0);
    4868           2 : }
    4869             : 
    4870             : static void
    4871           0 : bdev_nvme_add_io_path_failed(struct nvme_bdev *nbdev, void *ctx, int status)
    4872             : {
    4873           0 :         struct nvme_ns *nvme_ns = ctx;
    4874             : 
    4875           0 :         nvme_ctrlr_populate_namespace_done(nvme_ns, -1);
    4876           0 : }
    4877             : 
    4878             : static void
    4879          12 : bdev_nvme_add_io_path_done(struct nvme_bdev *nbdev, void *ctx, int status)
    4880             : {
    4881          12 :         struct nvme_ns *nvme_ns = ctx;
    4882             : 
    4883          12 :         if (status == 0) {
    4884          12 :                 nvme_ctrlr_populate_namespace_done(nvme_ns, 0);
    4885          12 :         } else {
    4886             :                 /* Delete the added io_paths and fail populating the namespace. */
    4887           0 :                 nvme_bdev_for_each_channel(nbdev,
    4888             :                                            bdev_nvme_delete_io_path,
    4889           0 :                                            nvme_ns,
    4890             :                                            bdev_nvme_add_io_path_failed);
    4891             :         }
    4892          12 : }
    4893             : 
    4894             : static int
    4895          13 : nvme_bdev_add_ns(struct nvme_bdev *bdev, struct nvme_ns *nvme_ns)
    4896             : {
    4897             :         struct nvme_ns *tmp_ns;
    4898             :         const struct spdk_nvme_ns_data *nsdata;
    4899             : 
    4900          13 :         nsdata = spdk_nvme_ns_get_data(nvme_ns->ns);
    4901          13 :         if (!nsdata->nmic.can_share) {
    4902           0 :                 SPDK_ERRLOG("Namespace cannot be shared.\n");
    4903           0 :                 return -EINVAL;
    4904             :         }
    4905             : 
    4906          13 :         pthread_mutex_lock(&bdev->mutex);
    4907             : 
    4908          13 :         tmp_ns = TAILQ_FIRST(&bdev->nvme_ns_list);
    4909          13 :         assert(tmp_ns != NULL);
    4910             : 
    4911          13 :         if (tmp_ns->ns != NULL && !bdev_nvme_compare_ns(nvme_ns->ns, tmp_ns->ns)) {
    4912           1 :                 pthread_mutex_unlock(&bdev->mutex);
    4913           1 :                 SPDK_ERRLOG("Namespaces are not identical.\n");
    4914           1 :                 return -EINVAL;
    4915             :         }
    4916             : 
    4917          12 :         bdev->ref++;
    4918          12 :         TAILQ_INSERT_TAIL(&bdev->nvme_ns_list, nvme_ns, tailq);
    4919          12 :         nvme_ns->bdev = bdev;
    4920             : 
    4921          12 :         pthread_mutex_unlock(&bdev->mutex);
    4922             : 
    4923             :         /* Add nvme_io_path to nvme_bdev_channels dynamically. */
    4924          24 :         nvme_bdev_for_each_channel(bdev,
    4925             :                                    bdev_nvme_add_io_path,
    4926          12 :                                    nvme_ns,
    4927             :                                    bdev_nvme_add_io_path_done);
    4928             : 
    4929          12 :         return 0;
    4930          13 : }
    4931             : 
    4932             : static void
    4933          52 : nvme_ctrlr_populate_namespace(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4934             : {
    4935             :         struct spdk_nvme_ns     *ns;
    4936             :         struct nvme_bdev        *bdev;
    4937          52 :         int                     rc = 0;
    4938             : 
    4939          52 :         ns = spdk_nvme_ctrlr_get_ns(nvme_ctrlr->ctrlr, nvme_ns->id);
    4940          52 :         if (!ns) {
    4941           0 :                 NVME_CTRLR_DEBUGLOG(nvme_ctrlr, "Invalid NS %d\n", nvme_ns->id);
    4942           0 :                 rc = -EINVAL;
    4943           0 :                 goto done;
    4944             :         }
    4945             : 
    4946          52 :         nvme_ns->ns = ns;
    4947          52 :         nvme_ns->ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
    4948             : 
    4949          52 :         if (nvme_ctrlr->ana_log_page != NULL) {
    4950          38 :                 bdev_nvme_parse_ana_log_page(nvme_ctrlr, nvme_ns_set_ana_state, nvme_ns);
    4951          38 :         }
    4952             : 
    4953          52 :         bdev = nvme_bdev_ctrlr_get_bdev(nvme_ctrlr->nbdev_ctrlr, nvme_ns->id);
    4954          92 :         if (bdev == NULL) {
    4955          39 :                 rc = nvme_bdev_create(nvme_ctrlr, nvme_ns);
    4956          39 :         } else {
    4957          13 :                 rc = nvme_bdev_add_ns(bdev, nvme_ns);
    4958          13 :                 if (rc == 0) {
    4959          12 :                         return;
    4960             :                 }
    4961             :         }
    4962             : done:
    4963          40 :         nvme_ctrlr_populate_namespace_done(nvme_ns, rc);
    4964          52 : }
    4965             : 
    4966             : static void
    4967          50 : nvme_ctrlr_depopulate_namespace_done(struct nvme_ns *nvme_ns)
    4968             : {
    4969          50 :         struct nvme_ctrlr *nvme_ctrlr = nvme_ns->ctrlr;
    4970             : 
    4971          50 :         assert(nvme_ctrlr != NULL);
    4972             : 
    4973          50 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4974             : 
    4975          50 :         RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4976             : 
    4977          50 :         if (nvme_ns->bdev != NULL) {
    4978           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4979           0 :                 return;
    4980             :         }
    4981             : 
    4982          50 :         nvme_ns_free(nvme_ns);
    4983          50 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4984             : 
    4985          50 :         nvme_ctrlr_put_ref(nvme_ctrlr);
    4986          50 : }
    4987             : 
    4988             : static void
    4989          11 : bdev_nvme_delete_io_path_done(struct nvme_bdev *nbdev, void *ctx, int status)
    4990             : {
    4991          11 :         struct nvme_ns *nvme_ns = ctx;
    4992             : 
    4993          11 :         nvme_ctrlr_depopulate_namespace_done(nvme_ns);
    4994          11 : }
    4995             : 
    4996             : static void
    4997          50 : nvme_ctrlr_depopulate_namespace(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4998             : {
    4999             :         struct nvme_bdev *bdev;
    5000             : 
    5001          50 :         spdk_poller_unregister(&nvme_ns->anatt_timer);
    5002             : 
    5003          50 :         bdev = nvme_ns->bdev;
    5004          50 :         if (bdev != NULL) {
    5005          46 :                 pthread_mutex_lock(&bdev->mutex);
    5006             : 
    5007          46 :                 assert(bdev->ref > 0);
    5008          46 :                 bdev->ref--;
    5009          46 :                 if (bdev->ref == 0) {
    5010          35 :                         pthread_mutex_unlock(&bdev->mutex);
    5011             : 
    5012          35 :                         spdk_bdev_unregister(&bdev->disk, NULL, NULL);
    5013          35 :                 } else {
    5014             :                         /* spdk_bdev_unregister() is not called until the last nvme_ns is
    5015             :                          * depopulated. Hence we need to remove nvme_ns from bdev->nvme_ns_list
    5016             :                          * and clear nvme_ns->bdev here.
    5017             :                          */
    5018          11 :                         TAILQ_REMOVE(&bdev->nvme_ns_list, nvme_ns, tailq);
    5019          11 :                         nvme_ns->bdev = NULL;
    5020             : 
    5021          11 :                         pthread_mutex_unlock(&bdev->mutex);
    5022             : 
    5023             :                         /* Delete nvme_io_paths from nvme_bdev_channels dynamically. After that,
    5024             :                          * we call depopulate_namespace_done() to avoid use-after-free.
    5025             :                          */
    5026          22 :                         nvme_bdev_for_each_channel(bdev,
    5027             :                                                    bdev_nvme_delete_io_path,
    5028          11 :                                                    nvme_ns,
    5029             :                                                    bdev_nvme_delete_io_path_done);
    5030          11 :                         return;
    5031             :                 }
    5032          35 :         }
    5033             : 
    5034          39 :         nvme_ctrlr_depopulate_namespace_done(nvme_ns);
    5035          50 : }
    5036             : 
    5037             : static void
    5038          63 : nvme_ctrlr_populate_namespaces(struct nvme_ctrlr *nvme_ctrlr,
    5039             :                                struct nvme_async_probe_ctx *ctx)
    5040             : {
    5041          63 :         struct spdk_nvme_ctrlr  *ctrlr = nvme_ctrlr->ctrlr;
    5042             :         struct nvme_ns  *nvme_ns, *next;
    5043             :         struct spdk_nvme_ns     *ns;
    5044             :         struct nvme_bdev        *bdev;
    5045             :         uint32_t                nsid;
    5046             :         int                     rc;
    5047             :         uint64_t                num_sectors;
    5048             : 
    5049          63 :         if (ctx) {
    5050             :                 /* Initialize this count to 1 to handle the populate functions
    5051             :                  * calling nvme_ctrlr_populate_namespace_done() immediately.
    5052             :                  */
    5053          47 :                 ctx->populates_in_progress = 1;
    5054          47 :         }
    5055             : 
    5056             :         /* First loop over our existing namespaces and see if they have been
    5057             :          * removed. */
    5058          63 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    5059          67 :         while (nvme_ns != NULL) {
    5060           4 :                 next = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    5061             : 
    5062           4 :                 if (spdk_nvme_ctrlr_is_active_ns(ctrlr, nvme_ns->id)) {
    5063             :                         /* NS is still there or added again. Its attributes may have changed. */
    5064           3 :                         ns = spdk_nvme_ctrlr_get_ns(ctrlr, nvme_ns->id);
    5065           3 :                         if (nvme_ns->ns != ns) {
    5066           1 :                                 assert(nvme_ns->ns == NULL);
    5067           1 :                                 nvme_ns->ns = ns;
    5068           1 :                                 NVME_CTRLR_DEBUGLOG(nvme_ctrlr, "NSID %u was added\n", nvme_ns->id);
    5069           1 :                         }
    5070             : 
    5071           3 :                         num_sectors = spdk_nvme_ns_get_num_sectors(ns);
    5072           3 :                         bdev = nvme_ns->bdev;
    5073           3 :                         assert(bdev != NULL);
    5074           3 :                         if (bdev->disk.blockcnt != num_sectors) {
    5075           1 :                                 NVME_CTRLR_NOTICELOG(nvme_ctrlr,
    5076             :                                                      "NSID %u is resized: bdev name %s, old size %" PRIu64 ", new size %" PRIu64 "\n",
    5077             :                                                      nvme_ns->id,
    5078             :                                                      bdev->disk.name,
    5079             :                                                      bdev->disk.blockcnt,
    5080             :                                                      num_sectors);
    5081           1 :                                 rc = spdk_bdev_notify_blockcnt_change(&bdev->disk, num_sectors);
    5082           1 :                                 if (rc != 0) {
    5083           0 :                                         NVME_CTRLR_ERRLOG(nvme_ctrlr,
    5084             :                                                           "Could not change num blocks for nvme bdev: name %s, errno: %d.\n",
    5085             :                                                           bdev->disk.name, rc);
    5086           0 :                                 }
    5087           1 :                         }
    5088           3 :                 } else {
    5089             :                         /* Namespace was removed */
    5090           1 :                         nvme_ctrlr_depopulate_namespace(nvme_ctrlr, nvme_ns);
    5091             :                 }
    5092             : 
    5093           4 :                 nvme_ns = next;
    5094             :         }
    5095             : 
    5096             :         /* Loop through all of the namespaces at the nvme level and see if any of them are new */
    5097          63 :         nsid = spdk_nvme_ctrlr_get_first_active_ns(ctrlr);
    5098         118 :         while (nsid != 0) {
    5099          55 :                 nvme_ns = nvme_ctrlr_get_ns(nvme_ctrlr, nsid);
    5100             : 
    5101          55 :                 if (nvme_ns == NULL) {
    5102             :                         /* Found a new one */
    5103          52 :                         nvme_ns = nvme_ns_alloc();
    5104          52 :                         if (nvme_ns == NULL) {
    5105           0 :                                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate namespace\n");
    5106             :                                 /* This just fails to attach the namespace. It may work on a future attempt. */
    5107           0 :                                 continue;
    5108             :                         }
    5109             : 
    5110          52 :                         nvme_ns->id = nsid;
    5111          52 :                         nvme_ns->ctrlr = nvme_ctrlr;
    5112             : 
    5113          52 :                         nvme_ns->bdev = NULL;
    5114             : 
    5115          52 :                         if (ctx) {
    5116          51 :                                 ctx->populates_in_progress++;
    5117          51 :                         }
    5118          52 :                         nvme_ns->probe_ctx = ctx;
    5119             : 
    5120          52 :                         RB_INSERT(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    5121             : 
    5122          52 :                         nvme_ctrlr_populate_namespace(nvme_ctrlr, nvme_ns);
    5123          52 :                 }
    5124             : 
    5125          55 :                 nsid = spdk_nvme_ctrlr_get_next_active_ns(ctrlr, nsid);
    5126             :         }
    5127             : 
    5128          63 :         if (ctx) {
    5129             :                 /* Decrement this count now that the loop is over to account
    5130             :                  * for the one we started with.  If the count is then 0, we
    5131             :                  * know any populate_namespace functions completed immediately,
    5132             :                  * so we'll kick the callback here.
    5133             :                  */
    5134          47 :                 ctx->populates_in_progress--;
    5135          47 :                 if (ctx->populates_in_progress == 0) {
    5136          35 :                         nvme_ctrlr_populate_namespaces_done(nvme_ctrlr, ctx);
    5137          35 :                 }
    5138          47 :         }
    5139             : 
    5140          63 : }
    5141             : 
    5142             : static void
    5143          62 : nvme_ctrlr_depopulate_namespaces(struct nvme_ctrlr *nvme_ctrlr)
    5144             : {
    5145             :         struct nvme_ns *nvme_ns, *tmp;
    5146             : 
    5147         111 :         RB_FOREACH_SAFE(nvme_ns, nvme_ns_tree, &nvme_ctrlr->namespaces, tmp) {
    5148          49 :                 nvme_ctrlr_depopulate_namespace(nvme_ctrlr, nvme_ns);
    5149          49 :         }
    5150          62 : }
    5151             : 
    5152             : static uint32_t
    5153          37 : nvme_ctrlr_get_ana_log_page_size(struct nvme_ctrlr *nvme_ctrlr)
    5154             : {
    5155          37 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5156             :         const struct spdk_nvme_ctrlr_data *cdata;
    5157          37 :         uint32_t nsid, ns_count = 0;
    5158             : 
    5159          37 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5160             : 
    5161          82 :         for (nsid = spdk_nvme_ctrlr_get_first_active_ns(ctrlr);
    5162          82 :              nsid != 0; nsid = spdk_nvme_ctrlr_get_next_active_ns(ctrlr, nsid)) {
    5163          45 :                 ns_count++;
    5164          45 :         }
    5165             : 
    5166          74 :         return sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
    5167          37 :                sizeof(struct spdk_nvme_ana_group_descriptor) + ns_count *
    5168             :                sizeof(uint32_t);
    5169             : }
    5170             : 
    5171             : static int
    5172           7 : nvme_ctrlr_set_ana_states(const struct spdk_nvme_ana_group_descriptor *desc,
    5173             :                           void *cb_arg)
    5174             : {
    5175           7 :         struct nvme_ctrlr *nvme_ctrlr = cb_arg;
    5176             :         struct nvme_ns *nvme_ns;
    5177             :         uint32_t i, nsid;
    5178             : 
    5179          13 :         for (i = 0; i < desc->num_of_nsid; i++) {
    5180           6 :                 nsid = desc->nsid[i];
    5181           6 :                 if (nsid == 0) {
    5182           0 :                         continue;
    5183             :                 }
    5184             : 
    5185           6 :                 nvme_ns = nvme_ctrlr_get_ns(nvme_ctrlr, nsid);
    5186             : 
    5187           6 :                 if (nvme_ns == NULL) {
    5188             :                         /* Target told us that an inactive namespace had an ANA change */
    5189           1 :                         continue;
    5190             :                 }
    5191             : 
    5192           5 :                 _nvme_ns_set_ana_state(nvme_ns, desc);
    5193           5 :         }
    5194             : 
    5195           7 :         return 0;
    5196             : }
    5197             : 
    5198             : static void
    5199           0 : bdev_nvme_disable_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr)
    5200             : {
    5201             :         struct nvme_ns *nvme_ns;
    5202             : 
    5203           0 :         spdk_free(nvme_ctrlr->ana_log_page);
    5204           0 :         nvme_ctrlr->ana_log_page = NULL;
    5205             : 
    5206           0 :         for (nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    5207           0 :              nvme_ns != NULL;
    5208           0 :              nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns)) {
    5209           0 :                 nvme_ns->ana_state_updating = false;
    5210           0 :                 nvme_ns->ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
    5211           0 :         }
    5212           0 : }
    5213             : 
    5214             : static void
    5215           3 : nvme_ctrlr_read_ana_log_page_done(void *ctx, const struct spdk_nvme_cpl *cpl)
    5216             : {
    5217           3 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    5218             : 
    5219           3 :         if (cpl != NULL && spdk_nvme_cpl_is_success(cpl)) {
    5220           6 :                 bdev_nvme_parse_ana_log_page(nvme_ctrlr, nvme_ctrlr_set_ana_states,
    5221           3 :                                              nvme_ctrlr);
    5222           3 :         } else {
    5223           0 :                 bdev_nvme_disable_read_ana_log_page(nvme_ctrlr);
    5224             :         }
    5225             : 
    5226           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    5227             : 
    5228           3 :         assert(nvme_ctrlr->ana_log_page_updating == true);
    5229           3 :         nvme_ctrlr->ana_log_page_updating = false;
    5230             : 
    5231           3 :         if (nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    5232           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5233             : 
    5234           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    5235           0 :         } else {
    5236           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5237             : 
    5238           3 :                 bdev_nvme_clear_io_path_caches(nvme_ctrlr);
    5239             :         }
    5240           3 : }
    5241             : 
    5242             : static int
    5243           6 : nvme_ctrlr_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr)
    5244             : {
    5245             :         uint32_t ana_log_page_size;
    5246             :         int rc;
    5247             : 
    5248           6 :         if (nvme_ctrlr->ana_log_page == NULL) {
    5249           0 :                 return -EINVAL;
    5250             :         }
    5251             : 
    5252           6 :         ana_log_page_size = nvme_ctrlr_get_ana_log_page_size(nvme_ctrlr);
    5253             : 
    5254           6 :         if (ana_log_page_size > nvme_ctrlr->max_ana_log_page_size) {
    5255           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr,
    5256             :                                   "ANA log page size %" PRIu32 " is larger than allowed %" PRIu32 "\n",
    5257             :                                   ana_log_page_size, nvme_ctrlr->max_ana_log_page_size);
    5258           0 :                 return -EINVAL;
    5259             :         }
    5260             : 
    5261           6 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    5262           6 :         if (!nvme_ctrlr_is_available(nvme_ctrlr) ||
    5263           5 :             nvme_ctrlr->ana_log_page_updating) {
    5264           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5265           3 :                 return -EBUSY;
    5266             :         }
    5267             : 
    5268           3 :         nvme_ctrlr->ana_log_page_updating = true;
    5269           3 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5270             : 
    5271           6 :         rc = spdk_nvme_ctrlr_cmd_get_log_page(nvme_ctrlr->ctrlr,
    5272             :                                               SPDK_NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS,
    5273             :                                               SPDK_NVME_GLOBAL_NS_TAG,
    5274           3 :                                               nvme_ctrlr->ana_log_page,
    5275           3 :                                               ana_log_page_size, 0,
    5276             :                                               nvme_ctrlr_read_ana_log_page_done,
    5277           3 :                                               nvme_ctrlr);
    5278           3 :         if (rc != 0) {
    5279           0 :                 nvme_ctrlr_read_ana_log_page_done(nvme_ctrlr, NULL);
    5280           0 :         }
    5281             : 
    5282           3 :         return rc;
    5283           6 : }
    5284             : 
    5285             : static void
    5286           0 : dummy_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
    5287             : {
    5288           0 : }
    5289             : 
    5290             : struct bdev_nvme_set_preferred_path_ctx {
    5291             :         struct spdk_bdev_desc *desc;
    5292             :         struct nvme_ns *nvme_ns;
    5293             :         bdev_nvme_set_preferred_path_cb cb_fn;
    5294             :         void *cb_arg;
    5295             : };
    5296             : 
    5297             : static void
    5298           3 : bdev_nvme_set_preferred_path_done(struct nvme_bdev *nbdev, void *_ctx, int status)
    5299             : {
    5300           3 :         struct bdev_nvme_set_preferred_path_ctx *ctx = _ctx;
    5301             : 
    5302           3 :         assert(ctx != NULL);
    5303           3 :         assert(ctx->desc != NULL);
    5304           3 :         assert(ctx->cb_fn != NULL);
    5305             : 
    5306           3 :         spdk_bdev_close(ctx->desc);
    5307             : 
    5308           3 :         ctx->cb_fn(ctx->cb_arg, status);
    5309             : 
    5310           3 :         free(ctx);
    5311           3 : }
    5312             : 
    5313             : static void
    5314           2 : _bdev_nvme_set_preferred_path(struct nvme_bdev_channel_iter *i,
    5315             :                               struct nvme_bdev *nbdev,
    5316             :                               struct nvme_bdev_channel *nbdev_ch, void *_ctx)
    5317             : {
    5318           2 :         struct bdev_nvme_set_preferred_path_ctx *ctx = _ctx;
    5319             :         struct nvme_io_path *io_path, *prev;
    5320             : 
    5321           2 :         prev = NULL;
    5322           3 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    5323           3 :                 if (io_path->nvme_ns == ctx->nvme_ns) {
    5324           2 :                         break;
    5325             :                 }
    5326           1 :                 prev = io_path;
    5327           1 :         }
    5328             : 
    5329           2 :         if (io_path != NULL) {
    5330           2 :                 if (prev != NULL) {
    5331           1 :                         STAILQ_REMOVE_AFTER(&nbdev_ch->io_path_list, prev, stailq);
    5332           1 :                         STAILQ_INSERT_HEAD(&nbdev_ch->io_path_list, io_path, stailq);
    5333           1 :                 }
    5334             : 
    5335             :                 /* We can set io_path to nbdev_ch->current_io_path directly here.
    5336             :                  * However, it needs to be conditional. To simplify the code,
    5337             :                  * just clear nbdev_ch->current_io_path and let find_io_path()
    5338             :                  * fill it.
    5339             :                  *
    5340             :                  * Automatic failback may be disabled. Hence even if the io_path is
    5341             :                  * already at the head, clear nbdev_ch->current_io_path.
    5342             :                  */
    5343           2 :                 bdev_nvme_clear_current_io_path(nbdev_ch);
    5344           2 :         }
    5345             : 
    5346           2 :         nvme_bdev_for_each_channel_continue(i, 0);
    5347           2 : }
    5348             : 
    5349             : static struct nvme_ns *
    5350           3 : bdev_nvme_set_preferred_ns(struct nvme_bdev *nbdev, uint16_t cntlid)
    5351             : {
    5352             :         struct nvme_ns *nvme_ns, *prev;
    5353             :         const struct spdk_nvme_ctrlr_data *cdata;
    5354             : 
    5355           3 :         prev = NULL;
    5356           6 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
    5357           6 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ns->ctrlr->ctrlr);
    5358             : 
    5359           6 :                 if (cdata->cntlid == cntlid) {
    5360           3 :                         break;
    5361             :                 }
    5362           3 :                 prev = nvme_ns;
    5363           3 :         }
    5364             : 
    5365           3 :         if (nvme_ns != NULL && prev != NULL) {
    5366           2 :                 TAILQ_REMOVE(&nbdev->nvme_ns_list, nvme_ns, tailq);
    5367           2 :                 TAILQ_INSERT_HEAD(&nbdev->nvme_ns_list, nvme_ns, tailq);
    5368           2 :         }
    5369             : 
    5370           3 :         return nvme_ns;
    5371             : }
    5372             : 
    5373             : /* This function supports only multipath mode. There is only a single I/O path
    5374             :  * for each NVMe-oF controller. Hence, just move the matched I/O path to the
    5375             :  * head of the I/O path list for each NVMe bdev channel.
    5376             :  *
    5377             :  * NVMe bdev channel may be acquired after completing this function. move the
    5378             :  * matched namespace to the head of the namespace list for the NVMe bdev too.
    5379             :  */
    5380             : void
    5381           3 : bdev_nvme_set_preferred_path(const char *name, uint16_t cntlid,
    5382             :                              bdev_nvme_set_preferred_path_cb cb_fn, void *cb_arg)
    5383             : {
    5384             :         struct bdev_nvme_set_preferred_path_ctx *ctx;
    5385             :         struct spdk_bdev *bdev;
    5386             :         struct nvme_bdev *nbdev;
    5387           3 :         int rc = 0;
    5388             : 
    5389           3 :         assert(cb_fn != NULL);
    5390             : 
    5391           3 :         ctx = calloc(1, sizeof(*ctx));
    5392           3 :         if (ctx == NULL) {
    5393           0 :                 SPDK_ERRLOG("Failed to alloc context.\n");
    5394           0 :                 rc = -ENOMEM;
    5395           0 :                 goto err_alloc;
    5396             :         }
    5397             : 
    5398           3 :         ctx->cb_fn = cb_fn;
    5399           3 :         ctx->cb_arg = cb_arg;
    5400             : 
    5401           3 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &ctx->desc);
    5402           3 :         if (rc != 0) {
    5403           0 :                 SPDK_ERRLOG("Failed to open bdev %s.\n", name);
    5404           0 :                 goto err_open;
    5405             :         }
    5406             : 
    5407           3 :         bdev = spdk_bdev_desc_get_bdev(ctx->desc);
    5408             : 
    5409           3 :         if (bdev->module != &nvme_if) {
    5410           0 :                 SPDK_ERRLOG("bdev %s is not registered in this module.\n", name);
    5411           0 :                 rc = -ENODEV;
    5412           0 :                 goto err_bdev;
    5413             :         }
    5414             : 
    5415           3 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    5416             : 
    5417           3 :         pthread_mutex_lock(&nbdev->mutex);
    5418             : 
    5419           3 :         ctx->nvme_ns = bdev_nvme_set_preferred_ns(nbdev, cntlid);
    5420           3 :         if (ctx->nvme_ns == NULL) {
    5421           0 :                 pthread_mutex_unlock(&nbdev->mutex);
    5422             : 
    5423           0 :                 SPDK_ERRLOG("bdev %s does not have namespace to controller %u.\n", name, cntlid);
    5424           0 :                 rc = -ENODEV;
    5425           0 :                 goto err_bdev;
    5426             :         }
    5427             : 
    5428           3 :         pthread_mutex_unlock(&nbdev->mutex);
    5429             : 
    5430           6 :         nvme_bdev_for_each_channel(nbdev,
    5431             :                                    _bdev_nvme_set_preferred_path,
    5432           3 :                                    ctx,
    5433             :                                    bdev_nvme_set_preferred_path_done);
    5434           3 :         return;
    5435             : 
    5436             : err_bdev:
    5437           0 :         spdk_bdev_close(ctx->desc);
    5438             : err_open:
    5439           0 :         free(ctx);
    5440             : err_alloc:
    5441           0 :         cb_fn(cb_arg, rc);
    5442           3 : }
    5443             : 
    5444             : struct bdev_nvme_set_multipath_policy_ctx {
    5445             :         struct spdk_bdev_desc *desc;
    5446             :         spdk_bdev_nvme_set_multipath_policy_cb cb_fn;
    5447             :         void *cb_arg;
    5448             : };
    5449             : 
    5450             : static void
    5451           3 : bdev_nvme_set_multipath_policy_done(struct nvme_bdev *nbdev, void *_ctx, int status)
    5452             : {
    5453           3 :         struct bdev_nvme_set_multipath_policy_ctx *ctx = _ctx;
    5454             : 
    5455           3 :         assert(ctx != NULL);
    5456           3 :         assert(ctx->desc != NULL);
    5457           3 :         assert(ctx->cb_fn != NULL);
    5458             : 
    5459           3 :         spdk_bdev_close(ctx->desc);
    5460             : 
    5461           3 :         ctx->cb_fn(ctx->cb_arg, status);
    5462             : 
    5463           3 :         free(ctx);
    5464           3 : }
    5465             : 
    5466             : static void
    5467           1 : _bdev_nvme_set_multipath_policy(struct nvme_bdev_channel_iter *i,
    5468             :                                 struct nvme_bdev *nbdev,
    5469             :                                 struct nvme_bdev_channel *nbdev_ch, void *ctx)
    5470             : {
    5471           1 :         nbdev_ch->mp_policy = nbdev->mp_policy;
    5472           1 :         nbdev_ch->mp_selector = nbdev->mp_selector;
    5473           1 :         nbdev_ch->rr_min_io = nbdev->rr_min_io;
    5474           1 :         bdev_nvme_clear_current_io_path(nbdev_ch);
    5475             : 
    5476           1 :         nvme_bdev_for_each_channel_continue(i, 0);
    5477           1 : }
    5478             : 
    5479             : void
    5480           3 : spdk_bdev_nvme_set_multipath_policy(const char *name, enum spdk_bdev_nvme_multipath_policy policy,
    5481             :                                     enum spdk_bdev_nvme_multipath_selector selector, uint32_t rr_min_io,
    5482             :                                     spdk_bdev_nvme_set_multipath_policy_cb cb_fn, void *cb_arg)
    5483             : {
    5484             :         struct bdev_nvme_set_multipath_policy_ctx *ctx;
    5485             :         struct spdk_bdev *bdev;
    5486             :         struct nvme_bdev *nbdev;
    5487             :         int rc;
    5488             : 
    5489           3 :         assert(cb_fn != NULL);
    5490             : 
    5491           3 :         switch (policy) {
    5492             :         case BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE:
    5493           1 :                 break;
    5494             :         case BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE:
    5495           2 :                 switch (selector) {
    5496             :                 case BDEV_NVME_MP_SELECTOR_ROUND_ROBIN:
    5497           1 :                         if (rr_min_io == UINT32_MAX) {
    5498           0 :                                 rr_min_io = 1;
    5499           1 :                         } else if (rr_min_io == 0) {
    5500           0 :                                 rc = -EINVAL;
    5501           0 :                                 goto exit;
    5502             :                         }
    5503           1 :                         break;
    5504             :                 case BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH:
    5505           1 :                         break;
    5506             :                 default:
    5507           0 :                         rc = -EINVAL;
    5508           0 :                         goto exit;
    5509             :                 }
    5510           2 :                 break;
    5511             :         default:
    5512           0 :                 rc = -EINVAL;
    5513           0 :                 goto exit;
    5514             :         }
    5515             : 
    5516           3 :         ctx = calloc(1, sizeof(*ctx));
    5517           3 :         if (ctx == NULL) {
    5518           0 :                 SPDK_ERRLOG("Failed to alloc context.\n");
    5519           0 :                 rc = -ENOMEM;
    5520           0 :                 goto exit;
    5521             :         }
    5522             : 
    5523           3 :         ctx->cb_fn = cb_fn;
    5524           3 :         ctx->cb_arg = cb_arg;
    5525             : 
    5526           3 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &ctx->desc);
    5527           3 :         if (rc != 0) {
    5528           0 :                 SPDK_ERRLOG("Failed to open bdev %s.\n", name);
    5529           0 :                 rc = -ENODEV;
    5530           0 :                 goto err_open;
    5531             :         }
    5532             : 
    5533           3 :         bdev = spdk_bdev_desc_get_bdev(ctx->desc);
    5534           3 :         if (bdev->module != &nvme_if) {
    5535           0 :                 SPDK_ERRLOG("bdev %s is not registered in this module.\n", name);
    5536           0 :                 rc = -ENODEV;
    5537           0 :                 goto err_module;
    5538             :         }
    5539           3 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    5540             : 
    5541           3 :         pthread_mutex_lock(&nbdev->mutex);
    5542           3 :         nbdev->mp_policy = policy;
    5543           3 :         nbdev->mp_selector = selector;
    5544           3 :         nbdev->rr_min_io = rr_min_io;
    5545           3 :         pthread_mutex_unlock(&nbdev->mutex);
    5546             : 
    5547           6 :         nvme_bdev_for_each_channel(nbdev,
    5548             :                                    _bdev_nvme_set_multipath_policy,
    5549           3 :                                    ctx,
    5550             :                                    bdev_nvme_set_multipath_policy_done);
    5551           3 :         return;
    5552             : 
    5553             : err_module:
    5554           0 :         spdk_bdev_close(ctx->desc);
    5555             : err_open:
    5556           0 :         free(ctx);
    5557             : exit:
    5558           0 :         cb_fn(cb_arg, rc);
    5559           3 : }
    5560             : 
    5561             : static void
    5562           3 : aer_cb(void *arg, const struct spdk_nvme_cpl *cpl)
    5563             : {
    5564           3 :         struct nvme_ctrlr *nvme_ctrlr           = arg;
    5565             :         union spdk_nvme_async_event_completion  event;
    5566             : 
    5567           3 :         if (spdk_nvme_cpl_is_error(cpl)) {
    5568           0 :                 SPDK_WARNLOG("AER request execute failed\n");
    5569           0 :                 return;
    5570             :         }
    5571             : 
    5572           3 :         event.raw = cpl->cdw0;
    5573           3 :         if ((event.bits.async_event_type == SPDK_NVME_ASYNC_EVENT_TYPE_NOTICE) &&
    5574           3 :             (event.bits.async_event_info == SPDK_NVME_ASYNC_EVENT_NS_ATTR_CHANGED)) {
    5575           2 :                 nvme_ctrlr_populate_namespaces(nvme_ctrlr, NULL);
    5576           3 :         } else if ((event.bits.async_event_type == SPDK_NVME_ASYNC_EVENT_TYPE_NOTICE) &&
    5577           1 :                    (event.bits.async_event_info == SPDK_NVME_ASYNC_EVENT_ANA_CHANGE)) {
    5578           1 :                 nvme_ctrlr_read_ana_log_page(nvme_ctrlr);
    5579           1 :         }
    5580           3 : }
    5581             : 
    5582             : static void
    5583          53 : free_nvme_async_probe_ctx(struct nvme_async_probe_ctx *ctx)
    5584             : {
    5585          53 :         spdk_keyring_put_key(ctx->drv_opts.tls_psk);
    5586          53 :         spdk_keyring_put_key(ctx->drv_opts.dhchap_key);
    5587          53 :         spdk_keyring_put_key(ctx->drv_opts.dhchap_ctrlr_key);
    5588          53 :         free(ctx);
    5589          53 : }
    5590             : 
    5591             : static void
    5592          53 : populate_namespaces_cb(struct nvme_async_probe_ctx *ctx, int rc)
    5593             : {
    5594          53 :         if (ctx->cb_fn) {
    5595          53 :                 ctx->cb_fn(ctx->cb_ctx, ctx->reported_bdevs, rc);
    5596          53 :         }
    5597             : 
    5598          53 :         ctx->namespaces_populated = true;
    5599          53 :         if (ctx->probe_done) {
    5600             :                 /* The probe was already completed, so we need to free the context
    5601             :                  * here.  This can happen for cases like OCSSD, where we need to
    5602             :                  * send additional commands to the SSD after attach.
    5603             :                  */
    5604          32 :                 free_nvme_async_probe_ctx(ctx);
    5605          32 :         }
    5606          53 : }
    5607             : 
    5608             : static int
    5609          20 : bdev_nvme_remove_poller(void *ctx)
    5610             : {
    5611             :         struct spdk_nvme_transport_id trid_pcie;
    5612             : 
    5613          20 :         if (TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    5614           1 :                 spdk_poller_unregister(&g_hotplug_poller);
    5615           1 :                 return SPDK_POLLER_IDLE;
    5616             :         }
    5617             : 
    5618          19 :         memset(&trid_pcie, 0, sizeof(trid_pcie));
    5619          19 :         spdk_nvme_trid_populate_transport(&trid_pcie, SPDK_NVME_TRANSPORT_PCIE);
    5620             : 
    5621          19 :         if (spdk_nvme_scan_attached(&trid_pcie)) {
    5622           0 :                 SPDK_ERRLOG_RATELIMIT("spdk_nvme_scan_attached() failed\n");
    5623           0 :         }
    5624             : 
    5625          19 :         return SPDK_POLLER_BUSY;
    5626          20 : }
    5627             : 
    5628             : static void
    5629          61 : nvme_ctrlr_create_done(struct nvme_ctrlr *nvme_ctrlr,
    5630             :                        struct nvme_async_probe_ctx *ctx)
    5631             : {
    5632          61 :         struct spdk_nvme_transport_id *trid = &nvme_ctrlr->active_path_id->trid;
    5633             : 
    5634          61 :         if (spdk_nvme_trtype_is_fabrics(trid->trtype)) {
    5635          61 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was created to %s:%s\n",
    5636             :                                    trid->traddr, trid->trsvcid);
    5637          61 :         } else {
    5638           0 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was created\n");
    5639             :         }
    5640             : 
    5641         122 :         spdk_io_device_register(nvme_ctrlr,
    5642             :                                 bdev_nvme_create_ctrlr_channel_cb,
    5643             :                                 bdev_nvme_destroy_ctrlr_channel_cb,
    5644             :                                 sizeof(struct nvme_ctrlr_channel),
    5645          61 :                                 nvme_ctrlr->nbdev_ctrlr->name);
    5646             : 
    5647          61 :         nvme_ctrlr_populate_namespaces(nvme_ctrlr, ctx);
    5648             : 
    5649          61 :         if (g_hotplug_poller == NULL) {
    5650           2 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_remove_poller, NULL,
    5651             :                                                         NVME_HOTPLUG_POLL_PERIOD_DEFAULT);
    5652           2 :         }
    5653          61 : }
    5654             : 
    5655             : static void
    5656          31 : nvme_ctrlr_init_ana_log_page_done(void *_ctx, const struct spdk_nvme_cpl *cpl)
    5657             : {
    5658          31 :         struct nvme_ctrlr *nvme_ctrlr = _ctx;
    5659          31 :         struct nvme_async_probe_ctx *ctx = nvme_ctrlr->probe_ctx;
    5660             : 
    5661          31 :         nvme_ctrlr->probe_ctx = NULL;
    5662             : 
    5663          31 :         if (spdk_nvme_cpl_is_error(cpl)) {
    5664           0 :                 nvme_ctrlr_delete(nvme_ctrlr);
    5665             : 
    5666           0 :                 if (ctx != NULL) {
    5667           0 :                         ctx->reported_bdevs = 0;
    5668           0 :                         populate_namespaces_cb(ctx, -1);
    5669           0 :                 }
    5670           0 :                 return;
    5671             :         }
    5672             : 
    5673          31 :         nvme_ctrlr_create_done(nvme_ctrlr, ctx);
    5674          31 : }
    5675             : 
    5676             : static int
    5677          31 : nvme_ctrlr_init_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
    5678             :                              struct nvme_async_probe_ctx *ctx)
    5679             : {
    5680          31 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5681             :         const struct spdk_nvme_ctrlr_data *cdata;
    5682             :         uint32_t ana_log_page_size;
    5683             : 
    5684          31 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5685             : 
    5686             :         /* Set buffer size enough to include maximum number of allowed namespaces. */
    5687          62 :         ana_log_page_size = sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
    5688          31 :                             sizeof(struct spdk_nvme_ana_group_descriptor) + cdata->mnan *
    5689             :                             sizeof(uint32_t);
    5690             : 
    5691          31 :         nvme_ctrlr->ana_log_page = spdk_zmalloc(ana_log_page_size, 64, NULL,
    5692             :                                                 SPDK_ENV_NUMA_ID_ANY, SPDK_MALLOC_DMA);
    5693          31 :         if (nvme_ctrlr->ana_log_page == NULL) {
    5694           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "could not allocate ANA log page buffer\n");
    5695           0 :                 return -ENXIO;
    5696             :         }
    5697             : 
    5698             :         /* Each descriptor in a ANA log page is not ensured to be 8-bytes aligned.
    5699             :          * Hence copy each descriptor to a temporary area when parsing it.
    5700             :          *
    5701             :          * Allocate a buffer whose size is as large as ANA log page buffer because
    5702             :          * we do not know the size of a descriptor until actually reading it.
    5703             :          */
    5704          31 :         nvme_ctrlr->copied_ana_desc = calloc(1, ana_log_page_size);
    5705          31 :         if (nvme_ctrlr->copied_ana_desc == NULL) {
    5706           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "could not allocate a buffer to parse ANA descriptor\n");
    5707           0 :                 return -ENOMEM;
    5708             :         }
    5709             : 
    5710          31 :         nvme_ctrlr->max_ana_log_page_size = ana_log_page_size;
    5711             : 
    5712          31 :         nvme_ctrlr->probe_ctx = ctx;
    5713             : 
    5714             :         /* Then, set the read size only to include the current active namespaces. */
    5715          31 :         ana_log_page_size = nvme_ctrlr_get_ana_log_page_size(nvme_ctrlr);
    5716             : 
    5717          31 :         if (ana_log_page_size > nvme_ctrlr->max_ana_log_page_size) {
    5718           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "ANA log page size %" PRIu32 " is larger than allowed %" PRIu32 "\n",
    5719             :                                   ana_log_page_size, nvme_ctrlr->max_ana_log_page_size);
    5720           0 :                 return -EINVAL;
    5721             :         }
    5722             : 
    5723          62 :         return spdk_nvme_ctrlr_cmd_get_log_page(ctrlr,
    5724             :                                                 SPDK_NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS,
    5725             :                                                 SPDK_NVME_GLOBAL_NS_TAG,
    5726          31 :                                                 nvme_ctrlr->ana_log_page,
    5727          31 :                                                 ana_log_page_size, 0,
    5728             :                                                 nvme_ctrlr_init_ana_log_page_done,
    5729          31 :                                                 nvme_ctrlr);
    5730          31 : }
    5731             : 
    5732             : /* hostnqn and subnqn were already verified before attaching a controller.
    5733             :  * Hence check only the multipath capability and cntlid here.
    5734             :  */
    5735             : static bool
    5736          16 : bdev_nvme_check_multipath(struct nvme_bdev_ctrlr *nbdev_ctrlr, struct spdk_nvme_ctrlr *ctrlr)
    5737             : {
    5738             :         struct nvme_ctrlr *tmp;
    5739             :         const struct spdk_nvme_ctrlr_data *cdata, *tmp_cdata;
    5740             : 
    5741          16 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5742             : 
    5743          16 :         if (!cdata->cmic.multi_ctrlr) {
    5744           0 :                 SPDK_ERRLOG("Ctrlr%u does not support multipath.\n", cdata->cntlid);
    5745           0 :                 return false;
    5746             :         }
    5747             : 
    5748          33 :         TAILQ_FOREACH(tmp, &nbdev_ctrlr->ctrlrs, tailq) {
    5749          18 :                 tmp_cdata = spdk_nvme_ctrlr_get_data(tmp->ctrlr);
    5750             : 
    5751          18 :                 if (!tmp_cdata->cmic.multi_ctrlr) {
    5752           0 :                         NVME_CTRLR_ERRLOG(tmp, "Ctrlr%u does not support multipath.\n", cdata->cntlid);
    5753           0 :                         return false;
    5754             :                 }
    5755          18 :                 if (cdata->cntlid == tmp_cdata->cntlid) {
    5756           1 :                         NVME_CTRLR_ERRLOG(tmp, "cntlid %u are duplicated.\n", tmp_cdata->cntlid);
    5757           1 :                         return false;
    5758             :                 }
    5759          17 :         }
    5760             : 
    5761          15 :         return true;
    5762          16 : }
    5763             : 
    5764             : 
    5765             : static int
    5766          62 : nvme_bdev_ctrlr_create(const char *name, struct nvme_ctrlr *nvme_ctrlr)
    5767             : {
    5768             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    5769          62 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5770             :         struct nvme_ctrlr      *nctrlr;
    5771          62 :         int rc = 0;
    5772             : 
    5773          62 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    5774             : 
    5775          62 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    5776          62 :         if (nbdev_ctrlr != NULL) {
    5777          16 :                 if (!bdev_nvme_check_multipath(nbdev_ctrlr, ctrlr)) {
    5778           1 :                         rc = -EINVAL;
    5779           1 :                         goto exit;
    5780             :                 }
    5781          32 :                 TAILQ_FOREACH(nctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    5782          17 :                         if (nctrlr->opts.multipath != nvme_ctrlr->opts.multipath) {
    5783             :                                 /* All controllers with the same name must be configured the same
    5784             :                                  * way, either for multipath or failover. If the configuration doesn't
    5785             :                                  * match - report error.
    5786             :                                  */
    5787           0 :                                 rc = -EINVAL;
    5788           0 :                                 goto exit;
    5789             :                         }
    5790          17 :                 }
    5791          15 :         } else {
    5792          46 :                 nbdev_ctrlr = calloc(1, sizeof(*nbdev_ctrlr));
    5793          46 :                 if (nbdev_ctrlr == NULL) {
    5794           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate nvme_bdev_ctrlr.\n");
    5795           0 :                         rc = -ENOMEM;
    5796           0 :                         goto exit;
    5797             :                 }
    5798          46 :                 nbdev_ctrlr->name = strdup(name);
    5799          46 :                 if (nbdev_ctrlr->name == NULL) {
    5800           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate name of nvme_bdev_ctrlr.\n");
    5801           0 :                         free(nbdev_ctrlr);
    5802           0 :                         goto exit;
    5803             :                 }
    5804          46 :                 TAILQ_INIT(&nbdev_ctrlr->ctrlrs);
    5805          46 :                 TAILQ_INIT(&nbdev_ctrlr->bdevs);
    5806          46 :                 TAILQ_INSERT_TAIL(&g_nvme_bdev_ctrlrs, nbdev_ctrlr, tailq);
    5807             :         }
    5808          61 :         nvme_ctrlr->nbdev_ctrlr = nbdev_ctrlr;
    5809          61 :         TAILQ_INSERT_TAIL(&nbdev_ctrlr->ctrlrs, nvme_ctrlr, tailq);
    5810             : exit:
    5811          62 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    5812          62 :         return rc;
    5813             : }
    5814             : 
    5815             : static int
    5816          62 : nvme_ctrlr_create(struct spdk_nvme_ctrlr *ctrlr,
    5817             :                   const char *name,
    5818             :                   const struct spdk_nvme_transport_id *trid,
    5819             :                   struct nvme_async_probe_ctx *ctx)
    5820             : {
    5821             :         struct nvme_ctrlr *nvme_ctrlr;
    5822             :         struct nvme_path_id *path_id;
    5823             :         const struct spdk_nvme_ctrlr_data *cdata;
    5824          62 :         struct spdk_event_handler_opts opts = {
    5825             :                 .opts_size = SPDK_SIZEOF(&opts, fd_type),
    5826             :         };
    5827             :         uint64_t period;
    5828             :         int fd, rc;
    5829             : 
    5830          62 :         nvme_ctrlr = calloc(1, sizeof(*nvme_ctrlr));
    5831          62 :         if (nvme_ctrlr == NULL) {
    5832           0 :                 SPDK_ERRLOG("Failed to allocate device struct\n");
    5833           0 :                 return -ENOMEM;
    5834             :         }
    5835             : 
    5836          62 :         rc = pthread_mutex_init(&nvme_ctrlr->mutex, NULL);
    5837          62 :         if (rc != 0) {
    5838           0 :                 free(nvme_ctrlr);
    5839           0 :                 return rc;
    5840             :         }
    5841             : 
    5842          62 :         TAILQ_INIT(&nvme_ctrlr->trids);
    5843          62 :         TAILQ_INIT(&nvme_ctrlr->pending_resets);
    5844          62 :         RB_INIT(&nvme_ctrlr->namespaces);
    5845             : 
    5846             :         /* Get another reference to the key, so the first one can be released from probe_ctx */
    5847          62 :         if (ctx != NULL) {
    5848          48 :                 if (ctx->drv_opts.tls_psk != NULL) {
    5849           0 :                         nvme_ctrlr->psk = spdk_keyring_get_key(
    5850           0 :                                                   spdk_key_get_name(ctx->drv_opts.tls_psk));
    5851           0 :                         if (nvme_ctrlr->psk == NULL) {
    5852             :                                 /* Could only happen if the key was removed in the meantime */
    5853           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5854             :                                             spdk_key_get_name(ctx->drv_opts.tls_psk));
    5855           0 :                                 rc = -ENOKEY;
    5856           0 :                                 goto err;
    5857             :                         }
    5858           0 :                 }
    5859             : 
    5860          48 :                 if (ctx->drv_opts.dhchap_key != NULL) {
    5861           0 :                         nvme_ctrlr->dhchap_key = spdk_keyring_get_key(
    5862           0 :                                                          spdk_key_get_name(ctx->drv_opts.dhchap_key));
    5863           0 :                         if (nvme_ctrlr->dhchap_key == NULL) {
    5864           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5865             :                                             spdk_key_get_name(ctx->drv_opts.dhchap_key));
    5866           0 :                                 rc = -ENOKEY;
    5867           0 :                                 goto err;
    5868             :                         }
    5869           0 :                 }
    5870             : 
    5871          48 :                 if (ctx->drv_opts.dhchap_ctrlr_key != NULL) {
    5872           0 :                         nvme_ctrlr->dhchap_ctrlr_key =
    5873           0 :                                 spdk_keyring_get_key(
    5874           0 :                                         spdk_key_get_name(ctx->drv_opts.dhchap_ctrlr_key));
    5875           0 :                         if (nvme_ctrlr->dhchap_ctrlr_key == NULL) {
    5876           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5877             :                                             spdk_key_get_name(ctx->drv_opts.dhchap_ctrlr_key));
    5878           0 :                                 rc = -ENOKEY;
    5879           0 :                                 goto err;
    5880             :                         }
    5881           0 :                 }
    5882          48 :         }
    5883             : 
    5884             :         /* Check if we manage to enable interrupts on the controller. */
    5885          62 :         if (spdk_interrupt_mode_is_enabled() && ctx != NULL && !ctx->drv_opts.enable_interrupts) {
    5886           0 :                 SPDK_ERRLOG("Failed to enable interrupts on the controller\n");
    5887           0 :                 rc = -ENOTSUP;
    5888           0 :                 goto err;
    5889             :         }
    5890             : 
    5891          62 :         path_id = calloc(1, sizeof(*path_id));
    5892          62 :         if (path_id == NULL) {
    5893           0 :                 SPDK_ERRLOG("Failed to allocate trid entry pointer\n");
    5894           0 :                 rc = -ENOMEM;
    5895           0 :                 goto err;
    5896             :         }
    5897             : 
    5898          62 :         path_id->trid = *trid;
    5899          62 :         if (ctx != NULL) {
    5900          48 :                 memcpy(path_id->hostid.hostaddr, ctx->drv_opts.src_addr, sizeof(path_id->hostid.hostaddr));
    5901          48 :                 memcpy(path_id->hostid.hostsvcid, ctx->drv_opts.src_svcid, sizeof(path_id->hostid.hostsvcid));
    5902          48 :         }
    5903          62 :         nvme_ctrlr->active_path_id = path_id;
    5904          62 :         TAILQ_INSERT_HEAD(&nvme_ctrlr->trids, path_id, link);
    5905             : 
    5906          62 :         nvme_ctrlr->thread = spdk_get_thread();
    5907          62 :         nvme_ctrlr->ctrlr = ctrlr;
    5908          62 :         nvme_ctrlr->ref = 1;
    5909             : 
    5910          62 :         if (spdk_nvme_ctrlr_is_ocssd_supported(ctrlr)) {
    5911           0 :                 SPDK_ERRLOG("OCSSDs are not supported");
    5912           0 :                 rc = -ENOTSUP;
    5913           0 :                 goto err;
    5914             :         }
    5915             : 
    5916          62 :         if (ctx != NULL) {
    5917          48 :                 memcpy(&nvme_ctrlr->opts, &ctx->bdev_opts, sizeof(ctx->bdev_opts));
    5918          48 :         } else {
    5919          14 :                 spdk_bdev_nvme_get_default_ctrlr_opts(&nvme_ctrlr->opts);
    5920             :         }
    5921             : 
    5922          62 :         period = spdk_interrupt_mode_is_enabled() ? 0 : g_opts.nvme_adminq_poll_period_us;
    5923             : 
    5924          62 :         nvme_ctrlr->adminq_timer_poller = SPDK_POLLER_REGISTER(bdev_nvme_poll_adminq, nvme_ctrlr,
    5925             :                                           period);
    5926             : 
    5927          62 :         if (spdk_interrupt_mode_is_enabled()) {
    5928           0 :                 spdk_poller_register_interrupt(nvme_ctrlr->adminq_timer_poller, NULL, NULL);
    5929             : 
    5930           0 :                 fd = spdk_nvme_ctrlr_get_admin_qp_fd(nvme_ctrlr->ctrlr, &opts);
    5931           0 :                 if (fd < 0) {
    5932           0 :                         rc = fd;
    5933           0 :                         goto err;
    5934             :                 }
    5935             : 
    5936           0 :                 nvme_ctrlr->intr = SPDK_INTERRUPT_REGISTER_EXT(fd, bdev_nvme_poll_adminq,
    5937             :                                    nvme_ctrlr, &opts);
    5938           0 :                 if (!nvme_ctrlr->intr) {
    5939           0 :                         rc = -EINVAL;
    5940           0 :                         goto err;
    5941             :                 }
    5942           0 :         }
    5943             : 
    5944          62 :         if (g_opts.timeout_us > 0) {
    5945             :                 /* Register timeout callback. Timeout values for IO vs. admin reqs can be different. */
    5946             :                 /* If timeout_admin_us is 0 (not specified), admin uses same timeout as IO. */
    5947           0 :                 uint64_t adm_timeout_us = (g_opts.timeout_admin_us == 0) ?
    5948           0 :                                           g_opts.timeout_us : g_opts.timeout_admin_us;
    5949           0 :                 spdk_nvme_ctrlr_register_timeout_callback(ctrlr, g_opts.timeout_us,
    5950           0 :                                 adm_timeout_us, timeout_cb, nvme_ctrlr);
    5951           0 :         }
    5952             : 
    5953          62 :         spdk_nvme_ctrlr_register_aer_callback(ctrlr, aer_cb, nvme_ctrlr);
    5954          62 :         spdk_nvme_ctrlr_set_remove_cb(ctrlr, remove_cb, nvme_ctrlr);
    5955             : 
    5956          62 :         if (spdk_nvme_ctrlr_get_flags(ctrlr) &
    5957             :             SPDK_NVME_CTRLR_SECURITY_SEND_RECV_SUPPORTED) {
    5958           0 :                 nvme_ctrlr->opal_dev = spdk_opal_dev_construct(ctrlr);
    5959           0 :         }
    5960             : 
    5961          62 :         rc = nvme_bdev_ctrlr_create(name, nvme_ctrlr);
    5962          62 :         if (rc != 0) {
    5963           1 :                 goto err;
    5964             :         }
    5965             : 
    5966          61 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5967             : 
    5968          61 :         if (cdata->cmic.ana_reporting) {
    5969          31 :                 rc = nvme_ctrlr_init_ana_log_page(nvme_ctrlr, ctx);
    5970          31 :                 if (rc == 0) {
    5971          31 :                         return 0;
    5972             :                 }
    5973           0 :         } else {
    5974          30 :                 nvme_ctrlr_create_done(nvme_ctrlr, ctx);
    5975          30 :                 return 0;
    5976             :         }
    5977             : 
    5978             : err:
    5979           1 :         nvme_ctrlr_delete(nvme_ctrlr);
    5980           1 :         return rc;
    5981          62 : }
    5982             : 
    5983             : void
    5984          34 : spdk_bdev_nvme_get_default_ctrlr_opts(struct spdk_bdev_nvme_ctrlr_opts *opts)
    5985             : {
    5986          34 :         opts->prchk_flags = 0;
    5987          34 :         opts->ctrlr_loss_timeout_sec = g_opts.ctrlr_loss_timeout_sec;
    5988          34 :         opts->reconnect_delay_sec = g_opts.reconnect_delay_sec;
    5989          34 :         opts->fast_io_fail_timeout_sec = g_opts.fast_io_fail_timeout_sec;
    5990          34 :         opts->multipath = true;
    5991          34 : }
    5992             : 
    5993             : static void
    5994           0 : attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    5995             :           struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *drv_opts)
    5996             : {
    5997             :         char *name;
    5998             : 
    5999           0 :         name = spdk_sprintf_alloc("HotInNvme%d", g_hot_insert_nvme_controller_index++);
    6000           0 :         if (!name) {
    6001           0 :                 SPDK_ERRLOG("Failed to assign name to NVMe device\n");
    6002           0 :                 return;
    6003             :         }
    6004             : 
    6005           0 :         if (nvme_ctrlr_create(ctrlr, name, trid, NULL) == 0) {
    6006           0 :                 SPDK_DEBUGLOG(bdev_nvme, "Attached to %s (%s)\n", trid->traddr, name);
    6007           0 :         } else {
    6008           0 :                 SPDK_ERRLOG("Failed to attach to %s (%s)\n", trid->traddr, name);
    6009             :         }
    6010             : 
    6011           0 :         free(name);
    6012           0 : }
    6013             : 
    6014             : static void
    6015          61 : _nvme_ctrlr_destruct(void *ctx)
    6016             : {
    6017          61 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    6018             : 
    6019          61 :         nvme_ctrlr_depopulate_namespaces(nvme_ctrlr);
    6020          61 :         nvme_ctrlr_put_ref(nvme_ctrlr);
    6021          61 : }
    6022             : 
    6023             : static int
    6024          58 : bdev_nvme_delete_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
    6025             : {
    6026             :         struct nvme_probe_skip_entry *entry;
    6027             : 
    6028             :         /* The controller's destruction was already started */
    6029          58 :         if (nvme_ctrlr->destruct) {
    6030           0 :                 return -EALREADY;
    6031             :         }
    6032             : 
    6033          58 :         if (!hotplug &&
    6034          58 :             nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6035           0 :                 entry = calloc(1, sizeof(*entry));
    6036           0 :                 if (!entry) {
    6037           0 :                         return -ENOMEM;
    6038             :                 }
    6039           0 :                 entry->trid = nvme_ctrlr->active_path_id->trid;
    6040           0 :                 TAILQ_INSERT_TAIL(&g_skipped_nvme_ctrlrs, entry, tailq);
    6041           0 :         }
    6042             : 
    6043          58 :         nvme_ctrlr->destruct = true;
    6044          58 :         return 0;
    6045          58 : }
    6046             : 
    6047             : static int
    6048           2 : bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
    6049             : {
    6050             :         int rc;
    6051             : 
    6052           2 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6053           2 :         rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, hotplug);
    6054           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6055             : 
    6056           2 :         if (rc == 0) {
    6057           2 :                 _nvme_ctrlr_destruct(nvme_ctrlr);
    6058           2 :         } else if (rc == -EALREADY) {
    6059           0 :                 rc = 0;
    6060           0 :         }
    6061             : 
    6062           2 :         return rc;
    6063             : }
    6064             : 
    6065             : static void
    6066           0 : remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr)
    6067             : {
    6068           0 :         struct nvme_ctrlr *nvme_ctrlr = cb_ctx;
    6069             : 
    6070           0 :         bdev_nvme_delete_ctrlr(nvme_ctrlr, true);
    6071           0 : }
    6072             : 
    6073             : static int
    6074           0 : bdev_nvme_hotplug_probe(void *arg)
    6075             : {
    6076           0 :         if (g_hotplug_probe_ctx == NULL) {
    6077           0 :                 spdk_poller_unregister(&g_hotplug_probe_poller);
    6078           0 :                 return SPDK_POLLER_IDLE;
    6079             :         }
    6080             : 
    6081           0 :         if (spdk_nvme_probe_poll_async(g_hotplug_probe_ctx) != -EAGAIN) {
    6082           0 :                 g_hotplug_probe_ctx = NULL;
    6083           0 :                 spdk_poller_unregister(&g_hotplug_probe_poller);
    6084           0 :         }
    6085             : 
    6086           0 :         return SPDK_POLLER_BUSY;
    6087           0 : }
    6088             : 
    6089             : static int
    6090           0 : bdev_nvme_hotplug(void *arg)
    6091             : {
    6092             :         struct spdk_nvme_transport_id trid_pcie;
    6093             : 
    6094           0 :         if (g_hotplug_probe_ctx) {
    6095           0 :                 return SPDK_POLLER_BUSY;
    6096             :         }
    6097             : 
    6098           0 :         memset(&trid_pcie, 0, sizeof(trid_pcie));
    6099           0 :         spdk_nvme_trid_populate_transport(&trid_pcie, SPDK_NVME_TRANSPORT_PCIE);
    6100             : 
    6101           0 :         g_hotplug_probe_ctx = spdk_nvme_probe_async(&trid_pcie, NULL,
    6102             :                               hotplug_probe_cb, attach_cb, NULL);
    6103             : 
    6104           0 :         if (g_hotplug_probe_ctx) {
    6105           0 :                 assert(g_hotplug_probe_poller == NULL);
    6106           0 :                 g_hotplug_probe_poller = SPDK_POLLER_REGISTER(bdev_nvme_hotplug_probe, NULL, 1000);
    6107           0 :         }
    6108             : 
    6109           0 :         return SPDK_POLLER_BUSY;
    6110           0 : }
    6111             : 
    6112             : void
    6113           0 : spdk_bdev_nvme_get_opts(struct spdk_bdev_nvme_opts *opts, size_t opts_size)
    6114             : {
    6115           0 :         if (!opts) {
    6116           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
    6117           0 :                 return;
    6118             :         }
    6119             : 
    6120           0 :         if (!opts_size) {
    6121           0 :                 SPDK_ERRLOG("opts_size should not be zero value\n");
    6122           0 :                 return;
    6123             :         }
    6124             : 
    6125           0 :         opts->opts_size = opts_size;
    6126             : 
    6127             : #define SET_FIELD(field, defval) \
    6128             :                 opts->field = SPDK_GET_FIELD(&g_opts, field, defval, opts_size); \
    6129             : 
    6130           0 :         SET_FIELD(action_on_timeout, 0);
    6131           0 :         SET_FIELD(keep_alive_timeout_ms, 0);
    6132           0 :         SET_FIELD(timeout_us, 0);
    6133           0 :         SET_FIELD(timeout_admin_us, 0);
    6134           0 :         SET_FIELD(transport_retry_count, 0);
    6135           0 :         SET_FIELD(arbitration_burst, 0);
    6136           0 :         SET_FIELD(low_priority_weight, 0);
    6137           0 :         SET_FIELD(medium_priority_weight, 0);
    6138           0 :         SET_FIELD(high_priority_weight, 0);
    6139           0 :         SET_FIELD(io_queue_requests, 0);
    6140           0 :         SET_FIELD(nvme_adminq_poll_period_us, 0);
    6141           0 :         SET_FIELD(nvme_ioq_poll_period_us, 0);
    6142           0 :         SET_FIELD(delay_cmd_submit, 0);
    6143           0 :         SET_FIELD(bdev_retry_count, 0);
    6144           0 :         SET_FIELD(ctrlr_loss_timeout_sec, 0);
    6145           0 :         SET_FIELD(reconnect_delay_sec, 0);
    6146           0 :         SET_FIELD(fast_io_fail_timeout_sec, 0);
    6147           0 :         SET_FIELD(transport_ack_timeout, 0);
    6148           0 :         SET_FIELD(disable_auto_failback, false);
    6149           0 :         SET_FIELD(generate_uuids, false);
    6150           0 :         SET_FIELD(transport_tos, 0);
    6151           0 :         SET_FIELD(nvme_error_stat, false);
    6152           0 :         SET_FIELD(io_path_stat, false);
    6153           0 :         SET_FIELD(allow_accel_sequence, false);
    6154           0 :         SET_FIELD(rdma_srq_size, 0);
    6155           0 :         SET_FIELD(rdma_max_cq_size, 0);
    6156           0 :         SET_FIELD(rdma_cm_event_timeout_ms, 0);
    6157           0 :         SET_FIELD(dhchap_digests, 0);
    6158           0 :         SET_FIELD(dhchap_dhgroups, 0);
    6159             : 
    6160             : #undef SET_FIELD
    6161             : 
    6162             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
    6163             :          * and do not forget to add the SET_FIELD statement for your added field. */
    6164             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_nvme_opts) == 120, "Incorrect size");
    6165           0 : }
    6166             : 
    6167             : static bool bdev_nvme_check_io_error_resiliency_params(int32_t ctrlr_loss_timeout_sec,
    6168             :                 uint32_t reconnect_delay_sec,
    6169             :                 uint32_t fast_io_fail_timeout_sec);
    6170             : 
    6171             : static int
    6172           0 : bdev_nvme_validate_opts(const struct spdk_bdev_nvme_opts *opts)
    6173             : {
    6174           0 :         if ((opts->timeout_us == 0) && (opts->timeout_admin_us != 0)) {
    6175             :                 /* Can't set timeout_admin_us without also setting timeout_us */
    6176           0 :                 SPDK_WARNLOG("Invalid options: Can't have (timeout_us == 0) with (timeout_admin_us > 0)\n");
    6177           0 :                 return -EINVAL;
    6178             :         }
    6179             : 
    6180           0 :         if (opts->bdev_retry_count < -1) {
    6181           0 :                 SPDK_WARNLOG("Invalid option: bdev_retry_count can't be less than -1.\n");
    6182           0 :                 return -EINVAL;
    6183             :         }
    6184             : 
    6185           0 :         if (!bdev_nvme_check_io_error_resiliency_params(opts->ctrlr_loss_timeout_sec,
    6186           0 :                         opts->reconnect_delay_sec,
    6187           0 :                         opts->fast_io_fail_timeout_sec)) {
    6188           0 :                 return -EINVAL;
    6189             :         }
    6190             : 
    6191           0 :         return 0;
    6192           0 : }
    6193             : 
    6194             : int
    6195           0 : spdk_bdev_nvme_set_opts(const struct spdk_bdev_nvme_opts *opts)
    6196             : {
    6197           0 :         if (!opts) {
    6198           0 :                 SPDK_ERRLOG("opts cannot be NULL\n");
    6199           0 :                 return -1;
    6200             :         }
    6201             : 
    6202           0 :         if (!opts->opts_size) {
    6203           0 :                 SPDK_ERRLOG("opts_size inside opts cannot be zero value\n");
    6204           0 :                 return -1;
    6205             :         }
    6206             : 
    6207             :         int ret;
    6208             : 
    6209           0 :         ret = bdev_nvme_validate_opts(opts);
    6210           0 :         if (ret) {
    6211           0 :                 SPDK_WARNLOG("Failed to set nvme opts.\n");
    6212           0 :                 return ret;
    6213             :         }
    6214             : 
    6215           0 :         if (g_bdev_nvme_init_thread != NULL) {
    6216           0 :                 if (!TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    6217           0 :                         return -EPERM;
    6218             :                 }
    6219           0 :         }
    6220             : 
    6221           0 :         if (opts->rdma_srq_size != 0 ||
    6222           0 :             opts->rdma_max_cq_size != 0 ||
    6223           0 :             opts->rdma_cm_event_timeout_ms != 0) {
    6224             :                 struct spdk_nvme_transport_opts drv_opts;
    6225             : 
    6226           0 :                 spdk_nvme_transport_get_opts(&drv_opts, sizeof(drv_opts));
    6227           0 :                 if (opts->rdma_srq_size != 0) {
    6228           0 :                         drv_opts.rdma_srq_size = opts->rdma_srq_size;
    6229           0 :                 }
    6230           0 :                 if (opts->rdma_max_cq_size != 0) {
    6231           0 :                         drv_opts.rdma_max_cq_size = opts->rdma_max_cq_size;
    6232           0 :                 }
    6233           0 :                 if (opts->rdma_cm_event_timeout_ms != 0) {
    6234           0 :                         drv_opts.rdma_cm_event_timeout_ms = opts->rdma_cm_event_timeout_ms;
    6235           0 :                 }
    6236             : 
    6237           0 :                 ret = spdk_nvme_transport_set_opts(&drv_opts, sizeof(drv_opts));
    6238           0 :                 if (ret) {
    6239           0 :                         SPDK_ERRLOG("Failed to set NVMe transport opts.\n");
    6240           0 :                         return ret;
    6241             :                 }
    6242           0 :         }
    6243             : 
    6244             : #define SET_FIELD(field, defval) \
    6245             :                 g_opts.field = SPDK_GET_FIELD(opts, field, defval, opts->opts_size); \
    6246             : 
    6247           0 :         SET_FIELD(action_on_timeout, 0);
    6248           0 :         SET_FIELD(keep_alive_timeout_ms, 0);
    6249           0 :         SET_FIELD(timeout_us, 0);
    6250           0 :         SET_FIELD(timeout_admin_us, 0);
    6251           0 :         SET_FIELD(transport_retry_count, 0);
    6252           0 :         SET_FIELD(arbitration_burst, 0);
    6253           0 :         SET_FIELD(low_priority_weight, 0);
    6254           0 :         SET_FIELD(medium_priority_weight, 0);
    6255           0 :         SET_FIELD(high_priority_weight, 0);
    6256           0 :         SET_FIELD(io_queue_requests, 0);
    6257           0 :         SET_FIELD(nvme_adminq_poll_period_us, 0);
    6258           0 :         SET_FIELD(nvme_ioq_poll_period_us, 0);
    6259           0 :         SET_FIELD(delay_cmd_submit, 0);
    6260           0 :         SET_FIELD(bdev_retry_count, 0);
    6261           0 :         SET_FIELD(ctrlr_loss_timeout_sec, 0);
    6262           0 :         SET_FIELD(reconnect_delay_sec, 0);
    6263           0 :         SET_FIELD(fast_io_fail_timeout_sec, 0);
    6264           0 :         SET_FIELD(transport_ack_timeout, 0);
    6265           0 :         SET_FIELD(disable_auto_failback, false);
    6266           0 :         SET_FIELD(generate_uuids, false);
    6267           0 :         SET_FIELD(transport_tos, 0);
    6268           0 :         SET_FIELD(nvme_error_stat, false);
    6269           0 :         SET_FIELD(io_path_stat, false);
    6270           0 :         SET_FIELD(allow_accel_sequence, false);
    6271           0 :         SET_FIELD(rdma_srq_size, 0);
    6272           0 :         SET_FIELD(rdma_max_cq_size, 0);
    6273           0 :         SET_FIELD(rdma_cm_event_timeout_ms, 0);
    6274           0 :         SET_FIELD(dhchap_digests, 0);
    6275           0 :         SET_FIELD(dhchap_dhgroups, 0);
    6276             : 
    6277           0 :         g_opts.opts_size = opts->opts_size;
    6278             : 
    6279             : #undef SET_FIELD
    6280             : 
    6281           0 :         return 0;
    6282           0 : }
    6283             : 
    6284             : struct set_nvme_hotplug_ctx {
    6285             :         uint64_t period_us;
    6286             :         bool enabled;
    6287             :         spdk_msg_fn fn;
    6288             :         void *fn_ctx;
    6289             : };
    6290             : 
    6291             : static void
    6292           0 : set_nvme_hotplug_period_cb(void *_ctx)
    6293             : {
    6294           0 :         struct set_nvme_hotplug_ctx *ctx = _ctx;
    6295             : 
    6296           0 :         spdk_poller_unregister(&g_hotplug_poller);
    6297           0 :         if (ctx->enabled) {
    6298           0 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_hotplug, NULL, ctx->period_us);
    6299           0 :         } else {
    6300           0 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_remove_poller, NULL,
    6301             :                                                         NVME_HOTPLUG_POLL_PERIOD_DEFAULT);
    6302             :         }
    6303             : 
    6304           0 :         g_nvme_hotplug_poll_period_us = ctx->period_us;
    6305           0 :         g_nvme_hotplug_enabled = ctx->enabled;
    6306           0 :         if (ctx->fn) {
    6307           0 :                 ctx->fn(ctx->fn_ctx);
    6308           0 :         }
    6309             : 
    6310           0 :         free(ctx);
    6311           0 : }
    6312             : 
    6313             : int
    6314           0 : bdev_nvme_set_hotplug(bool enabled, uint64_t period_us, spdk_msg_fn cb, void *cb_ctx)
    6315             : {
    6316             :         struct set_nvme_hotplug_ctx *ctx;
    6317             : 
    6318           0 :         if (enabled == true && !spdk_process_is_primary()) {
    6319           0 :                 return -EPERM;
    6320             :         }
    6321             : 
    6322           0 :         ctx = calloc(1, sizeof(*ctx));
    6323           0 :         if (ctx == NULL) {
    6324           0 :                 return -ENOMEM;
    6325             :         }
    6326             : 
    6327           0 :         period_us = period_us == 0 ? NVME_HOTPLUG_POLL_PERIOD_DEFAULT : period_us;
    6328           0 :         ctx->period_us = spdk_min(period_us, NVME_HOTPLUG_POLL_PERIOD_MAX);
    6329           0 :         ctx->enabled = enabled;
    6330           0 :         ctx->fn = cb;
    6331           0 :         ctx->fn_ctx = cb_ctx;
    6332             : 
    6333           0 :         spdk_thread_send_msg(g_bdev_nvme_init_thread, set_nvme_hotplug_period_cb, ctx);
    6334           0 :         return 0;
    6335           0 : }
    6336             : 
    6337             : static void
    6338          47 : nvme_ctrlr_populate_namespaces_done(struct nvme_ctrlr *nvme_ctrlr,
    6339             :                                     struct nvme_async_probe_ctx *ctx)
    6340             : {
    6341             :         struct nvme_ns  *nvme_ns;
    6342             :         struct nvme_bdev        *nvme_bdev;
    6343             :         size_t                  j;
    6344             : 
    6345          47 :         assert(nvme_ctrlr != NULL);
    6346             : 
    6347          47 :         if (ctx->names == NULL) {
    6348           0 :                 ctx->reported_bdevs = 0;
    6349           0 :                 populate_namespaces_cb(ctx, 0);
    6350           0 :                 return;
    6351             :         }
    6352             : 
    6353             :         /*
    6354             :          * Report the new bdevs that were created in this call.
    6355             :          * There can be more than one bdev per NVMe controller.
    6356             :          */
    6357          47 :         j = 0;
    6358          47 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    6359          96 :         while (nvme_ns != NULL) {
    6360          49 :                 nvme_bdev = nvme_ns->bdev;
    6361          49 :                 if (j < ctx->max_bdevs) {
    6362          49 :                         ctx->names[j] = nvme_bdev->disk.name;
    6363          49 :                         j++;
    6364          49 :                 } else {
    6365           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr,
    6366             :                                           "Maximum number of namespaces supported per NVMe controller is %du. "
    6367             :                                           "Unable to return all names of created bdevs\n",
    6368             :                                           ctx->max_bdevs);
    6369           0 :                         ctx->reported_bdevs = 0;
    6370           0 :                         populate_namespaces_cb(ctx, -ERANGE);
    6371           0 :                         return;
    6372             :                 }
    6373             : 
    6374          49 :                 nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    6375             :         }
    6376             : 
    6377          47 :         ctx->reported_bdevs = j;
    6378          47 :         populate_namespaces_cb(ctx, 0);
    6379          47 : }
    6380             : 
    6381             : static int
    6382           9 : bdev_nvme_check_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    6383             :                                struct spdk_nvme_ctrlr *new_ctrlr,
    6384             :                                struct spdk_nvme_transport_id *trid)
    6385             : {
    6386             :         struct nvme_path_id *tmp_trid;
    6387             : 
    6388           9 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6389           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "PCIe failover is not supported.\n");
    6390           0 :                 return -ENOTSUP;
    6391             :         }
    6392             : 
    6393             :         /* Currently we only support failover to the same transport type. */
    6394           9 :         if (nvme_ctrlr->active_path_id->trid.trtype != trid->trtype) {
    6395           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr,
    6396             :                                    "Failover from trtype: %s to a different trtype: %s is not supported currently\n",
    6397             :                                    spdk_nvme_transport_id_trtype_str(nvme_ctrlr->active_path_id->trid.trtype),
    6398             :                                    spdk_nvme_transport_id_trtype_str(trid->trtype));
    6399           0 :                 return -EINVAL;
    6400             :         }
    6401             : 
    6402             : 
    6403             :         /* Currently we only support failover to the same NQN. */
    6404           9 :         if (strncmp(trid->subnqn, nvme_ctrlr->active_path_id->trid.subnqn, SPDK_NVMF_NQN_MAX_LEN)) {
    6405           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr,
    6406             :                                    "Failover from subnqn: %s to a different subnqn: %s is not supported currently\n",
    6407             :                                    nvme_ctrlr->active_path_id->trid.subnqn, trid->subnqn);
    6408           0 :                 return -EINVAL;
    6409             :         }
    6410             : 
    6411             :         /* Skip all the other checks if we've already registered this path. */
    6412          21 :         TAILQ_FOREACH(tmp_trid, &nvme_ctrlr->trids, link) {
    6413          12 :                 if (!spdk_nvme_transport_id_compare(&tmp_trid->trid, trid)) {
    6414           0 :                         NVME_CTRLR_WARNLOG(nvme_ctrlr, "This path (traddr: %s subnqn: %s) is already registered\n",
    6415             :                                            trid->traddr, trid->subnqn);
    6416           0 :                         return -EALREADY;
    6417             :                 }
    6418          12 :         }
    6419             : 
    6420           9 :         return 0;
    6421           9 : }
    6422             : 
    6423             : static int
    6424           9 : bdev_nvme_check_secondary_namespace(struct nvme_ctrlr *nvme_ctrlr,
    6425             :                                     struct spdk_nvme_ctrlr *new_ctrlr)
    6426             : {
    6427             :         struct nvme_ns *nvme_ns;
    6428             :         struct spdk_nvme_ns *new_ns;
    6429             : 
    6430           9 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    6431           9 :         while (nvme_ns != NULL) {
    6432           0 :                 new_ns = spdk_nvme_ctrlr_get_ns(new_ctrlr, nvme_ns->id);
    6433           0 :                 assert(new_ns != NULL);
    6434             : 
    6435           0 :                 if (!bdev_nvme_compare_ns(nvme_ns->ns, new_ns)) {
    6436           0 :                         return -EINVAL;
    6437             :                 }
    6438             : 
    6439           0 :                 nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    6440             :         }
    6441             : 
    6442           9 :         return 0;
    6443           9 : }
    6444             : 
    6445             : static int
    6446           9 : _bdev_nvme_add_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    6447             :                               struct spdk_nvme_transport_id *trid)
    6448             : {
    6449             :         struct nvme_path_id *active_id, *new_trid, *tmp_trid;
    6450             : 
    6451           9 :         new_trid = calloc(1, sizeof(*new_trid));
    6452           9 :         if (new_trid == NULL) {
    6453           0 :                 return -ENOMEM;
    6454             :         }
    6455           9 :         new_trid->trid = *trid;
    6456             : 
    6457           9 :         active_id = nvme_ctrlr->active_path_id;
    6458           9 :         assert(active_id != NULL);
    6459           9 :         assert(active_id == TAILQ_FIRST(&nvme_ctrlr->trids));
    6460             : 
    6461             :         /* Skip the active trid not to replace it until it is failed. */
    6462           9 :         tmp_trid = TAILQ_NEXT(active_id, link);
    6463           9 :         if (tmp_trid == NULL) {
    6464           6 :                 goto add_tail;
    6465             :         }
    6466             : 
    6467             :         /* It means the trid is faled if its last failed time is non-zero.
    6468             :          * Insert the new alternate trid before any failed trid.
    6469             :          */
    6470           5 :         TAILQ_FOREACH_FROM(tmp_trid, &nvme_ctrlr->trids, link) {
    6471           3 :                 if (tmp_trid->last_failed_tsc != 0) {
    6472           1 :                         TAILQ_INSERT_BEFORE(tmp_trid, new_trid, link);
    6473           1 :                         return 0;
    6474             :                 }
    6475           4 :         }
    6476             : 
    6477             : add_tail:
    6478           8 :         TAILQ_INSERT_TAIL(&nvme_ctrlr->trids, new_trid, link);
    6479           8 :         return 0;
    6480           9 : }
    6481             : 
    6482             : /* This is the case that a secondary path is added to an existing
    6483             :  * nvme_ctrlr for failover. After checking if it can access the same
    6484             :  * namespaces as the primary path, it is disconnected until failover occurs.
    6485             :  */
    6486             : static int
    6487           9 : bdev_nvme_add_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    6488             :                              struct spdk_nvme_ctrlr *new_ctrlr,
    6489             :                              struct spdk_nvme_transport_id *trid)
    6490             : {
    6491             :         int rc;
    6492             : 
    6493           9 :         assert(nvme_ctrlr != NULL);
    6494             : 
    6495           9 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6496             : 
    6497           9 :         rc = bdev_nvme_check_secondary_trid(nvme_ctrlr, new_ctrlr, trid);
    6498           9 :         if (rc != 0) {
    6499           0 :                 goto exit;
    6500             :         }
    6501             : 
    6502           9 :         rc = bdev_nvme_check_secondary_namespace(nvme_ctrlr, new_ctrlr);
    6503           9 :         if (rc != 0) {
    6504           0 :                 goto exit;
    6505             :         }
    6506             : 
    6507           9 :         rc = _bdev_nvme_add_secondary_trid(nvme_ctrlr, trid);
    6508             : 
    6509             : exit:
    6510           9 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6511             : 
    6512           9 :         spdk_nvme_detach(new_ctrlr);
    6513             : 
    6514           9 :         return rc;
    6515             : }
    6516             : 
    6517             : static void
    6518          48 : connect_attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    6519             :                   struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
    6520             : {
    6521          48 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6522             :         struct nvme_async_probe_ctx *ctx;
    6523             :         int rc;
    6524             : 
    6525          48 :         ctx = SPDK_CONTAINEROF(user_opts, struct nvme_async_probe_ctx, drv_opts);
    6526          48 :         ctx->ctrlr_attached = true;
    6527             : 
    6528          48 :         rc = nvme_ctrlr_create(ctrlr, ctx->base_name, &ctx->trid, ctx);
    6529          48 :         if (rc != 0) {
    6530           1 :                 ctx->reported_bdevs = 0;
    6531           1 :                 populate_namespaces_cb(ctx, rc);
    6532           1 :         }
    6533          48 : }
    6534             : 
    6535             : 
    6536             : static void
    6537           4 : connect_set_failover_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    6538             :                         struct spdk_nvme_ctrlr *ctrlr,
    6539             :                         const struct spdk_nvme_ctrlr_opts *opts)
    6540             : {
    6541           4 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6542             :         struct nvme_ctrlr *nvme_ctrlr;
    6543             :         struct nvme_async_probe_ctx *ctx;
    6544             :         int rc;
    6545             : 
    6546           4 :         ctx = SPDK_CONTAINEROF(user_opts, struct nvme_async_probe_ctx, drv_opts);
    6547           4 :         ctx->ctrlr_attached = true;
    6548             : 
    6549           4 :         nvme_ctrlr = nvme_ctrlr_get_by_name(ctx->base_name);
    6550           4 :         if (nvme_ctrlr) {
    6551           4 :                 rc = bdev_nvme_add_secondary_trid(nvme_ctrlr, ctrlr, &ctx->trid);
    6552           4 :         } else {
    6553           0 :                 rc = -ENODEV;
    6554             :         }
    6555             : 
    6556           4 :         ctx->reported_bdevs = 0;
    6557           4 :         populate_namespaces_cb(ctx, rc);
    6558           4 : }
    6559             : 
    6560             : static int
    6561          53 : bdev_nvme_async_poll(void *arg)
    6562             : {
    6563          53 :         struct nvme_async_probe_ctx     *ctx = arg;
    6564             :         int                             rc;
    6565             : 
    6566          53 :         rc = spdk_nvme_probe_poll_async(ctx->probe_ctx);
    6567          53 :         if (spdk_unlikely(rc != -EAGAIN)) {
    6568          53 :                 ctx->probe_done = true;
    6569          53 :                 spdk_poller_unregister(&ctx->poller);
    6570          53 :                 if (!ctx->ctrlr_attached) {
    6571             :                         /* The probe is done, but no controller was attached.
    6572             :                          * That means we had a failure, so report -EIO back to
    6573             :                          * the caller (usually the RPC). populate_namespaces_cb()
    6574             :                          * will take care of freeing the nvme_async_probe_ctx.
    6575             :                          */
    6576           1 :                         ctx->reported_bdevs = 0;
    6577           1 :                         populate_namespaces_cb(ctx, -EIO);
    6578          53 :                 } else if (ctx->namespaces_populated) {
    6579             :                         /* The namespaces for the attached controller were all
    6580             :                          * populated and the response was already sent to the
    6581             :                          * caller (usually the RPC).  So free the context here.
    6582             :                          */
    6583          21 :                         free_nvme_async_probe_ctx(ctx);
    6584          21 :                 }
    6585          53 :         }
    6586             : 
    6587          53 :         return SPDK_POLLER_BUSY;
    6588             : }
    6589             : 
    6590             : static bool
    6591          72 : bdev_nvme_check_io_error_resiliency_params(int32_t ctrlr_loss_timeout_sec,
    6592             :                 uint32_t reconnect_delay_sec,
    6593             :                 uint32_t fast_io_fail_timeout_sec)
    6594             : {
    6595          72 :         if (ctrlr_loss_timeout_sec < -1) {
    6596           1 :                 SPDK_ERRLOG("ctrlr_loss_timeout_sec can't be less than -1.\n");
    6597           1 :                 return false;
    6598          71 :         } else if (ctrlr_loss_timeout_sec == -1) {
    6599          14 :                 if (reconnect_delay_sec == 0) {
    6600           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be 0 if ctrlr_loss_timeout_sec is not 0.\n");
    6601           1 :                         return false;
    6602          13 :                 } else if (fast_io_fail_timeout_sec != 0 &&
    6603           3 :                            fast_io_fail_timeout_sec < reconnect_delay_sec) {
    6604           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be more than fast_io-fail_timeout_sec.\n");
    6605           1 :                         return false;
    6606             :                 }
    6607          69 :         } else if (ctrlr_loss_timeout_sec != 0) {
    6608          11 :                 if (reconnect_delay_sec == 0) {
    6609           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be 0 if ctrlr_loss_timeout_sec is not 0.\n");
    6610           1 :                         return false;
    6611          10 :                 } else if (reconnect_delay_sec > (uint32_t)ctrlr_loss_timeout_sec) {
    6612           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be more than ctrlr_loss_timeout_sec.\n");
    6613           1 :                         return false;
    6614           9 :                 } else if (fast_io_fail_timeout_sec != 0) {
    6615           6 :                         if (fast_io_fail_timeout_sec < reconnect_delay_sec) {
    6616           1 :                                 SPDK_ERRLOG("reconnect_delay_sec can't be more than fast_io_fail_timeout_sec.\n");
    6617           1 :                                 return false;
    6618           5 :                         } else if (fast_io_fail_timeout_sec > (uint32_t)ctrlr_loss_timeout_sec) {
    6619           1 :                                 SPDK_ERRLOG("fast_io_fail_timeout_sec can't be more than ctrlr_loss_timeout_sec.\n");
    6620           1 :                                 return false;
    6621             :                         }
    6622           4 :                 }
    6623          53 :         } else if (reconnect_delay_sec != 0 || fast_io_fail_timeout_sec != 0) {
    6624           2 :                 SPDK_ERRLOG("Both reconnect_delay_sec and fast_io_fail_timeout_sec must be 0 if ctrlr_loss_timeout_sec is 0.\n");
    6625           2 :                 return false;
    6626             :         }
    6627             : 
    6628          63 :         return true;
    6629          72 : }
    6630             : 
    6631             : int
    6632          53 : spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
    6633             :                       const char *base_name,
    6634             :                       const char **names,
    6635             :                       uint32_t count,
    6636             :                       spdk_bdev_nvme_create_cb cb_fn,
    6637             :                       void *cb_ctx,
    6638             :                       struct spdk_nvme_ctrlr_opts *drv_opts,
    6639             :                       struct spdk_bdev_nvme_ctrlr_opts *bdev_opts)
    6640             : {
    6641             :         struct nvme_probe_skip_entry *entry, *tmp;
    6642             :         struct nvme_async_probe_ctx *ctx;
    6643             :         spdk_nvme_attach_cb attach_cb;
    6644             :         struct nvme_ctrlr *nvme_ctrlr;
    6645             :         int len;
    6646             : 
    6647             :         /* TODO expand this check to include both the host and target TRIDs.
    6648             :          * Only if both are the same should we fail.
    6649             :          */
    6650          53 :         if (nvme_ctrlr_get(trid, drv_opts->hostnqn) != NULL) {
    6651           0 :                 SPDK_ERRLOG("A controller with the provided trid (traddr: %s, hostnqn: %s) "
    6652             :                             "already exists.\n", trid->traddr, drv_opts->hostnqn);
    6653           0 :                 return -EEXIST;
    6654             :         }
    6655             : 
    6656          53 :         len = strnlen(base_name, SPDK_CONTROLLER_NAME_MAX);
    6657             : 
    6658          53 :         if (len == 0 || len == SPDK_CONTROLLER_NAME_MAX) {
    6659           0 :                 SPDK_ERRLOG("controller name must be between 1 and %d characters\n", SPDK_CONTROLLER_NAME_MAX - 1);
    6660           0 :                 return -EINVAL;
    6661             :         }
    6662             : 
    6663          53 :         if (bdev_opts != NULL &&
    6664         106 :             !bdev_nvme_check_io_error_resiliency_params(bdev_opts->ctrlr_loss_timeout_sec,
    6665          53 :                             bdev_opts->reconnect_delay_sec,
    6666          53 :                             bdev_opts->fast_io_fail_timeout_sec)) {
    6667           0 :                 return -EINVAL;
    6668             :         }
    6669             : 
    6670          53 :         ctx = calloc(1, sizeof(*ctx));
    6671          53 :         if (!ctx) {
    6672           0 :                 return -ENOMEM;
    6673             :         }
    6674          53 :         ctx->base_name = base_name;
    6675          53 :         ctx->names = names;
    6676          53 :         ctx->max_bdevs = count;
    6677          53 :         ctx->cb_fn = cb_fn;
    6678          53 :         ctx->cb_ctx = cb_ctx;
    6679          53 :         ctx->trid = *trid;
    6680             : 
    6681          53 :         if (bdev_opts) {
    6682          53 :                 memcpy(&ctx->bdev_opts, bdev_opts, sizeof(*bdev_opts));
    6683          53 :         } else {
    6684           0 :                 spdk_bdev_nvme_get_default_ctrlr_opts(&ctx->bdev_opts);
    6685             :         }
    6686             : 
    6687          53 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6688           0 :                 TAILQ_FOREACH_SAFE(entry, &g_skipped_nvme_ctrlrs, tailq, tmp) {
    6689           0 :                         if (spdk_nvme_transport_id_compare(trid, &entry->trid) == 0) {
    6690           0 :                                 TAILQ_REMOVE(&g_skipped_nvme_ctrlrs, entry, tailq);
    6691           0 :                                 free(entry);
    6692           0 :                                 break;
    6693             :                         }
    6694           0 :                 }
    6695           0 :         }
    6696             : 
    6697          53 :         memcpy(&ctx->drv_opts, drv_opts, sizeof(*drv_opts));
    6698          53 :         ctx->drv_opts.transport_retry_count = g_opts.transport_retry_count;
    6699          53 :         ctx->drv_opts.transport_ack_timeout = g_opts.transport_ack_timeout;
    6700          53 :         ctx->drv_opts.keep_alive_timeout_ms = g_opts.keep_alive_timeout_ms;
    6701          53 :         ctx->drv_opts.disable_read_ana_log_page = true;
    6702          53 :         ctx->drv_opts.transport_tos = g_opts.transport_tos;
    6703             : 
    6704          53 :         if (spdk_interrupt_mode_is_enabled()) {
    6705           0 :                 if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6706           0 :                         ctx->drv_opts.enable_interrupts = true;
    6707           0 :                 } else {
    6708           0 :                         SPDK_ERRLOG("Interrupt mode is only supported with PCIe transport\n");
    6709           0 :                         free_nvme_async_probe_ctx(ctx);
    6710           0 :                         return -ENOTSUP;
    6711             :                 }
    6712           0 :         }
    6713             : 
    6714          53 :         if (ctx->bdev_opts.psk != NULL) {
    6715           0 :                 ctx->drv_opts.tls_psk = spdk_keyring_get_key(ctx->bdev_opts.psk);
    6716           0 :                 if (ctx->drv_opts.tls_psk == NULL) {
    6717           0 :                         SPDK_ERRLOG("Could not load PSK: %s\n", ctx->bdev_opts.psk);
    6718           0 :                         free_nvme_async_probe_ctx(ctx);
    6719           0 :                         return -ENOKEY;
    6720             :                 }
    6721           0 :         }
    6722             : 
    6723          53 :         if (ctx->bdev_opts.dhchap_key != NULL) {
    6724           0 :                 ctx->drv_opts.dhchap_key = spdk_keyring_get_key(ctx->bdev_opts.dhchap_key);
    6725           0 :                 if (ctx->drv_opts.dhchap_key == NULL) {
    6726           0 :                         SPDK_ERRLOG("Could not load DH-HMAC-CHAP key: %s\n",
    6727             :                                     ctx->bdev_opts.dhchap_key);
    6728           0 :                         free_nvme_async_probe_ctx(ctx);
    6729           0 :                         return -ENOKEY;
    6730             :                 }
    6731             : 
    6732           0 :                 ctx->drv_opts.dhchap_digests = g_opts.dhchap_digests;
    6733           0 :                 ctx->drv_opts.dhchap_dhgroups = g_opts.dhchap_dhgroups;
    6734           0 :         }
    6735          53 :         if (ctx->bdev_opts.dhchap_ctrlr_key != NULL) {
    6736           0 :                 ctx->drv_opts.dhchap_ctrlr_key =
    6737           0 :                         spdk_keyring_get_key(ctx->bdev_opts.dhchap_ctrlr_key);
    6738           0 :                 if (ctx->drv_opts.dhchap_ctrlr_key == NULL) {
    6739           0 :                         SPDK_ERRLOG("Could not load DH-HMAC-CHAP controller key: %s\n",
    6740             :                                     ctx->bdev_opts.dhchap_ctrlr_key);
    6741           0 :                         free_nvme_async_probe_ctx(ctx);
    6742           0 :                         return -ENOKEY;
    6743             :                 }
    6744           0 :         }
    6745             : 
    6746          53 :         if (nvme_bdev_ctrlr_get_by_name(base_name) == NULL || ctx->bdev_opts.multipath) {
    6747          49 :                 attach_cb = connect_attach_cb;
    6748          49 :         } else {
    6749           4 :                 attach_cb = connect_set_failover_cb;
    6750             :         }
    6751             : 
    6752          53 :         nvme_ctrlr = nvme_ctrlr_get_by_name(ctx->base_name);
    6753          53 :         if (nvme_ctrlr  && nvme_ctrlr->opts.multipath != ctx->bdev_opts.multipath) {
    6754             :                 /* All controllers with the same name must be configured the same
    6755             :                  * way, either for multipath or failover. If the configuration doesn't
    6756             :                  * match - report error.
    6757             :                  */
    6758           0 :                 free_nvme_async_probe_ctx(ctx);
    6759           0 :                 return -EINVAL;
    6760             :         }
    6761             : 
    6762          53 :         ctx->probe_ctx = spdk_nvme_connect_async(trid, &ctx->drv_opts, attach_cb);
    6763          53 :         if (ctx->probe_ctx == NULL) {
    6764           0 :                 SPDK_ERRLOG("No controller was found with provided trid (traddr: %s)\n", trid->traddr);
    6765           0 :                 free_nvme_async_probe_ctx(ctx);
    6766           0 :                 return -ENODEV;
    6767             :         }
    6768          53 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_nvme_async_poll, ctx, 1000);
    6769             : 
    6770          53 :         return 0;
    6771          53 : }
    6772             : 
    6773             : struct bdev_nvme_delete_ctx {
    6774             :         char                        *name;
    6775             :         struct nvme_path_id         path_id;
    6776             :         bdev_nvme_delete_done_fn    delete_done;
    6777             :         void                        *delete_done_ctx;
    6778             :         uint64_t                    timeout_ticks;
    6779             :         struct spdk_poller          *poller;
    6780             : };
    6781             : 
    6782             : static void
    6783           2 : free_bdev_nvme_delete_ctx(struct bdev_nvme_delete_ctx *ctx)
    6784             : {
    6785           2 :         if (ctx != NULL) {
    6786           1 :                 free(ctx->name);
    6787           1 :                 free(ctx);
    6788           1 :         }
    6789           2 : }
    6790             : 
    6791             : static bool
    6792          76 : nvme_path_id_compare(struct nvme_path_id *p, const struct nvme_path_id *path_id)
    6793             : {
    6794          76 :         if (path_id->trid.trtype != 0) {
    6795          21 :                 if (path_id->trid.trtype == SPDK_NVME_TRANSPORT_CUSTOM) {
    6796           0 :                         if (strcasecmp(path_id->trid.trstring, p->trid.trstring) != 0) {
    6797           0 :                                 return false;
    6798             :                         }
    6799           0 :                 } else {
    6800          21 :                         if (path_id->trid.trtype != p->trid.trtype) {
    6801           0 :                                 return false;
    6802             :                         }
    6803             :                 }
    6804          21 :         }
    6805             : 
    6806          76 :         if (!spdk_mem_all_zero(path_id->trid.traddr, sizeof(path_id->trid.traddr))) {
    6807          21 :                 if (strcasecmp(path_id->trid.traddr, p->trid.traddr) != 0) {
    6808          11 :                         return false;
    6809             :                 }
    6810          10 :         }
    6811             : 
    6812          65 :         if (path_id->trid.adrfam != 0) {
    6813           0 :                 if (path_id->trid.adrfam != p->trid.adrfam) {
    6814           0 :                         return false;
    6815             :                 }
    6816           0 :         }
    6817             : 
    6818          65 :         if (!spdk_mem_all_zero(path_id->trid.trsvcid, sizeof(path_id->trid.trsvcid))) {
    6819          10 :                 if (strcasecmp(path_id->trid.trsvcid, p->trid.trsvcid) != 0) {
    6820           0 :                         return false;
    6821             :                 }
    6822          10 :         }
    6823             : 
    6824          65 :         if (!spdk_mem_all_zero(path_id->trid.subnqn, sizeof(path_id->trid.subnqn))) {
    6825          10 :                 if (strcmp(path_id->trid.subnqn, p->trid.subnqn) != 0) {
    6826           0 :                         return false;
    6827             :                 }
    6828          10 :         }
    6829             : 
    6830          65 :         if (!spdk_mem_all_zero(path_id->hostid.hostaddr, sizeof(path_id->hostid.hostaddr))) {
    6831           0 :                 if (strcmp(path_id->hostid.hostaddr, p->hostid.hostaddr) != 0) {
    6832           0 :                         return false;
    6833             :                 }
    6834           0 :         }
    6835             : 
    6836          65 :         if (!spdk_mem_all_zero(path_id->hostid.hostsvcid, sizeof(path_id->hostid.hostsvcid))) {
    6837           0 :                 if (strcmp(path_id->hostid.hostsvcid, p->hostid.hostsvcid) != 0) {
    6838           0 :                         return false;
    6839             :                 }
    6840           0 :         }
    6841             : 
    6842          65 :         return true;
    6843          76 : }
    6844             : 
    6845             : static bool
    6846           2 : nvme_path_id_exists(const char *name, const struct nvme_path_id *path_id)
    6847             : {
    6848             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
    6849             :         struct nvme_ctrlr       *ctrlr;
    6850             :         struct nvme_path_id     *p;
    6851             : 
    6852           2 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    6853           2 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    6854           2 :         if (!nbdev_ctrlr) {
    6855           1 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6856           1 :                 return false;
    6857             :         }
    6858             : 
    6859           1 :         TAILQ_FOREACH(ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    6860           1 :                 pthread_mutex_lock(&ctrlr->mutex);
    6861           1 :                 TAILQ_FOREACH(p, &ctrlr->trids, link) {
    6862           1 :                         if (nvme_path_id_compare(p, path_id)) {
    6863           1 :                                 pthread_mutex_unlock(&ctrlr->mutex);
    6864           1 :                                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6865           1 :                                 return true;
    6866             :                         }
    6867           0 :                 }
    6868           0 :                 pthread_mutex_unlock(&ctrlr->mutex);
    6869           0 :         }
    6870           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6871             : 
    6872           0 :         return false;
    6873           2 : }
    6874             : 
    6875             : static int
    6876           2 : bdev_nvme_delete_complete_poll(void *arg)
    6877             : {
    6878           2 :         struct bdev_nvme_delete_ctx     *ctx = arg;
    6879           2 :         int                             rc = 0;
    6880             : 
    6881           2 :         if (nvme_path_id_exists(ctx->name, &ctx->path_id)) {
    6882           1 :                 if (ctx->timeout_ticks > spdk_get_ticks()) {
    6883           1 :                         return SPDK_POLLER_BUSY;
    6884             :                 }
    6885             : 
    6886           0 :                 SPDK_ERRLOG("NVMe path '%s' still exists after delete\n", ctx->name);
    6887           0 :                 rc = -ETIMEDOUT;
    6888           0 :         }
    6889             : 
    6890           1 :         spdk_poller_unregister(&ctx->poller);
    6891             : 
    6892           1 :         ctx->delete_done(ctx->delete_done_ctx, rc);
    6893           1 :         free_bdev_nvme_delete_ctx(ctx);
    6894             : 
    6895           1 :         return SPDK_POLLER_BUSY;
    6896           2 : }
    6897             : 
    6898             : static int
    6899          65 : _bdev_nvme_delete(struct nvme_ctrlr *nvme_ctrlr, const struct nvme_path_id *path_id)
    6900             : {
    6901             :         struct nvme_path_id     *p, *t;
    6902             :         spdk_msg_fn             msg_fn;
    6903          65 :         int                     rc = -ENXIO;
    6904             : 
    6905          65 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6906             : 
    6907          75 :         TAILQ_FOREACH_REVERSE_SAFE(p, &nvme_ctrlr->trids, nvme_paths, link, t) {
    6908          75 :                 if (p == TAILQ_FIRST(&nvme_ctrlr->trids)) {
    6909          65 :                         break;
    6910             :                 }
    6911             : 
    6912          10 :                 if (!nvme_path_id_compare(p, path_id)) {
    6913           3 :                         continue;
    6914             :                 }
    6915             : 
    6916             :                 /* We are not using the specified path. */
    6917           7 :                 TAILQ_REMOVE(&nvme_ctrlr->trids, p, link);
    6918           7 :                 free(p);
    6919           7 :                 rc = 0;
    6920           7 :         }
    6921             : 
    6922          65 :         if (p == NULL || !nvme_path_id_compare(p, path_id)) {
    6923           8 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6924           8 :                 return rc;
    6925             :         }
    6926             : 
    6927             :         /* If we made it here, then this path is a match! Now we need to remove it. */
    6928             : 
    6929             :         /* This is the active path in use right now. The active path is always the first in the list. */
    6930          57 :         assert(p == nvme_ctrlr->active_path_id);
    6931             : 
    6932          57 :         if (!TAILQ_NEXT(p, link)) {
    6933             :                 /* The current path is the only path. */
    6934          56 :                 msg_fn = _nvme_ctrlr_destruct;
    6935          56 :                 rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, false);
    6936          56 :         } else {
    6937             :                 /* There is an alternative path. */
    6938           1 :                 msg_fn = _bdev_nvme_reset_ctrlr;
    6939           1 :                 rc = bdev_nvme_failover_ctrlr_unsafe(nvme_ctrlr, true);
    6940             :         }
    6941             : 
    6942          57 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6943             : 
    6944          57 :         if (rc == 0) {
    6945          57 :                 spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    6946          57 :         } else if (rc == -EALREADY) {
    6947           0 :                 rc = 0;
    6948           0 :         }
    6949             : 
    6950          57 :         return rc;
    6951          65 : }
    6952             : 
    6953             : int
    6954          50 : bdev_nvme_delete(const char *name, const struct nvme_path_id *path_id,
    6955             :                  bdev_nvme_delete_done_fn delete_done, void *delete_done_ctx)
    6956             : {
    6957             :         struct nvme_bdev_ctrlr          *nbdev_ctrlr;
    6958             :         struct nvme_ctrlr               *nvme_ctrlr, *tmp_nvme_ctrlr;
    6959          50 :         struct bdev_nvme_delete_ctx     *ctx = NULL;
    6960          50 :         int                             rc = -ENXIO, _rc;
    6961             : 
    6962          50 :         if (name == NULL || path_id == NULL) {
    6963           0 :                 rc = -EINVAL;
    6964           0 :                 goto exit;
    6965             :         }
    6966             : 
    6967          50 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    6968             : 
    6969          50 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    6970          50 :         if (nbdev_ctrlr == NULL) {
    6971           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6972             : 
    6973           0 :                 SPDK_ERRLOG("Failed to find NVMe bdev controller\n");
    6974           0 :                 rc = -ENODEV;
    6975           0 :                 goto exit;
    6976             :         }
    6977             : 
    6978         115 :         TAILQ_FOREACH_SAFE(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq, tmp_nvme_ctrlr) {
    6979          65 :                 _rc = _bdev_nvme_delete(nvme_ctrlr, path_id);
    6980          65 :                 if (_rc < 0 && _rc != -ENXIO) {
    6981           0 :                         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6982           0 :                         rc = _rc;
    6983           0 :                         goto exit;
    6984          65 :                 } else if (_rc == 0) {
    6985             :                         /* We traverse all remaining nvme_ctrlrs even if one nvme_ctrlr
    6986             :                          * was deleted successfully. To remember the successful deletion,
    6987             :                          * overwrite rc only if _rc is zero.
    6988             :                          */
    6989          59 :                         rc = 0;
    6990          59 :                 }
    6991          65 :         }
    6992             : 
    6993          50 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6994             : 
    6995          50 :         if (rc != 0 || delete_done == NULL) {
    6996          49 :                 goto exit;
    6997             :         }
    6998             : 
    6999           1 :         ctx = calloc(1, sizeof(*ctx));
    7000           1 :         if (ctx == NULL) {
    7001           0 :                 SPDK_ERRLOG("Failed to allocate context for bdev_nvme_delete\n");
    7002           0 :                 rc = -ENOMEM;
    7003           0 :                 goto exit;
    7004             :         }
    7005             : 
    7006           1 :         ctx->name = strdup(name);
    7007           1 :         if (ctx->name == NULL) {
    7008           0 :                 SPDK_ERRLOG("Failed to copy controller name for deletion\n");
    7009           0 :                 rc = -ENOMEM;
    7010           0 :                 goto exit;
    7011             :         }
    7012             : 
    7013           1 :         ctx->delete_done = delete_done;
    7014           1 :         ctx->delete_done_ctx = delete_done_ctx;
    7015           1 :         ctx->path_id = *path_id;
    7016           1 :         ctx->timeout_ticks = spdk_get_ticks() + 10 * spdk_get_ticks_hz();
    7017           1 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_nvme_delete_complete_poll, ctx, 1000);
    7018           1 :         if (ctx->poller == NULL) {
    7019           0 :                 SPDK_ERRLOG("Failed to register bdev_nvme_delete poller\n");
    7020           0 :                 rc = -ENOMEM;
    7021           0 :                 goto exit;
    7022             :         }
    7023             : 
    7024             : exit:
    7025          50 :         if (rc != 0) {
    7026           1 :                 free_bdev_nvme_delete_ctx(ctx);
    7027           1 :         }
    7028             : 
    7029          50 :         return rc;
    7030             : }
    7031             : 
    7032             : #define DISCOVERY_INFOLOG(ctx, format, ...) \
    7033             :         SPDK_INFOLOG(bdev_nvme, "Discovery[%s:%s] " format, ctx->trid.traddr, ctx->trid.trsvcid, ##__VA_ARGS__);
    7034             : 
    7035             : #define DISCOVERY_ERRLOG(ctx, format, ...) \
    7036             :         SPDK_ERRLOG("Discovery[%s:%s] " format, ctx->trid.traddr, ctx->trid.trsvcid, ##__VA_ARGS__);
    7037             : 
    7038             : struct discovery_entry_ctx {
    7039             :         char                                            name[128];
    7040             :         struct spdk_nvme_transport_id                   trid;
    7041             :         struct spdk_nvme_ctrlr_opts                     drv_opts;
    7042             :         struct spdk_nvmf_discovery_log_page_entry       entry;
    7043             :         TAILQ_ENTRY(discovery_entry_ctx)                tailq;
    7044             :         struct discovery_ctx                            *ctx;
    7045             : };
    7046             : 
    7047             : struct discovery_ctx {
    7048             :         char                                    *name;
    7049             :         spdk_bdev_nvme_start_discovery_fn       start_cb_fn;
    7050             :         spdk_bdev_nvme_stop_discovery_fn        stop_cb_fn;
    7051             :         void                                    *cb_ctx;
    7052             :         struct spdk_nvme_probe_ctx              *probe_ctx;
    7053             :         struct spdk_nvme_detach_ctx             *detach_ctx;
    7054             :         struct spdk_nvme_ctrlr                  *ctrlr;
    7055             :         struct spdk_nvme_transport_id           trid;
    7056             :         struct discovery_entry_ctx              *entry_ctx_in_use;
    7057             :         struct spdk_poller                      *poller;
    7058             :         struct spdk_nvme_ctrlr_opts             drv_opts;
    7059             :         struct spdk_bdev_nvme_ctrlr_opts        bdev_opts;
    7060             :         struct spdk_nvmf_discovery_log_page     *log_page;
    7061             :         TAILQ_ENTRY(discovery_ctx)              tailq;
    7062             :         TAILQ_HEAD(, discovery_entry_ctx)       nvm_entry_ctxs;
    7063             :         TAILQ_HEAD(, discovery_entry_ctx)       discovery_entry_ctxs;
    7064             :         int                                     rc;
    7065             :         bool                                    wait_for_attach;
    7066             :         uint64_t                                timeout_ticks;
    7067             :         /* Denotes that the discovery service is being started. We're waiting
    7068             :          * for the initial connection to the discovery controller to be
    7069             :          * established and attach discovered NVM ctrlrs.
    7070             :          */
    7071             :         bool                                    initializing;
    7072             :         /* Denotes if a discovery is currently in progress for this context.
    7073             :          * That includes connecting to newly discovered subsystems.  Used to
    7074             :          * ensure we do not start a new discovery until an existing one is
    7075             :          * complete.
    7076             :          */
    7077             :         bool                                    in_progress;
    7078             : 
    7079             :         /* Denotes if another discovery is needed after the one in progress
    7080             :          * completes.  Set when we receive an AER completion while a discovery
    7081             :          * is already in progress.
    7082             :          */
    7083             :         bool                                    pending;
    7084             : 
    7085             :         /* Signal to the discovery context poller that it should stop the
    7086             :          * discovery service, including detaching from the current discovery
    7087             :          * controller.
    7088             :          */
    7089             :         bool                                    stop;
    7090             : 
    7091             :         struct spdk_thread                      *calling_thread;
    7092             :         uint32_t                                index;
    7093             :         uint32_t                                attach_in_progress;
    7094             :         char                                    *hostnqn;
    7095             : 
    7096             :         /* Denotes if the discovery service was started by the mdns discovery.
    7097             :          */
    7098             :         bool                                    from_mdns_discovery_service;
    7099             : };
    7100             : 
    7101             : TAILQ_HEAD(discovery_ctxs, discovery_ctx);
    7102             : static struct discovery_ctxs g_discovery_ctxs = TAILQ_HEAD_INITIALIZER(g_discovery_ctxs);
    7103             : 
    7104             : static void get_discovery_log_page(struct discovery_ctx *ctx);
    7105             : 
    7106             : static void
    7107           0 : free_discovery_ctx(struct discovery_ctx *ctx)
    7108             : {
    7109           0 :         free(ctx->log_page);
    7110           0 :         free(ctx->hostnqn);
    7111           0 :         free(ctx->name);
    7112           0 :         free(ctx);
    7113           0 : }
    7114             : 
    7115             : static void
    7116           0 : discovery_complete(struct discovery_ctx *ctx)
    7117             : {
    7118           0 :         ctx->initializing = false;
    7119           0 :         ctx->in_progress = false;
    7120           0 :         if (ctx->pending) {
    7121           0 :                 ctx->pending = false;
    7122           0 :                 get_discovery_log_page(ctx);
    7123           0 :         }
    7124           0 : }
    7125             : 
    7126             : static void
    7127           0 : build_trid_from_log_page_entry(struct spdk_nvme_transport_id *trid,
    7128             :                                struct spdk_nvmf_discovery_log_page_entry *entry)
    7129             : {
    7130             :         char *space;
    7131             : 
    7132           0 :         trid->trtype = entry->trtype;
    7133           0 :         trid->adrfam = entry->adrfam;
    7134           0 :         memcpy(trid->traddr, entry->traddr, sizeof(entry->traddr));
    7135           0 :         memcpy(trid->trsvcid, entry->trsvcid, sizeof(entry->trsvcid));
    7136             :         /* Because the source buffer (entry->subnqn) is longer than trid->subnqn, and
    7137             :          * before call to this function trid->subnqn is zeroed out, we need
    7138             :          * to copy sizeof(trid->subnqn) minus one byte to make sure the last character
    7139             :          * remains 0. Then we can shorten the string (replace ' ' with 0) if required
    7140             :          */
    7141           0 :         memcpy(trid->subnqn, entry->subnqn, sizeof(trid->subnqn) - 1);
    7142             : 
    7143             :         /* We want the traddr, trsvcid and subnqn fields to be NULL-terminated.
    7144             :          * But the log page entries typically pad them with spaces, not zeroes.
    7145             :          * So add a NULL terminator to each of these fields at the appropriate
    7146             :          * location.
    7147             :          */
    7148           0 :         space = strchr(trid->traddr, ' ');
    7149           0 :         if (space) {
    7150           0 :                 *space = 0;
    7151           0 :         }
    7152           0 :         space = strchr(trid->trsvcid, ' ');
    7153           0 :         if (space) {
    7154           0 :                 *space = 0;
    7155           0 :         }
    7156           0 :         space = strchr(trid->subnqn, ' ');
    7157           0 :         if (space) {
    7158           0 :                 *space = 0;
    7159           0 :         }
    7160           0 : }
    7161             : 
    7162             : static void
    7163           0 : _stop_discovery(void *_ctx)
    7164             : {
    7165           0 :         struct discovery_ctx *ctx = _ctx;
    7166             : 
    7167           0 :         if (ctx->attach_in_progress > 0) {
    7168           0 :                 spdk_thread_send_msg(spdk_get_thread(), _stop_discovery, ctx);
    7169           0 :                 return;
    7170             :         }
    7171             : 
    7172           0 :         ctx->stop = true;
    7173             : 
    7174           0 :         while (!TAILQ_EMPTY(&ctx->nvm_entry_ctxs)) {
    7175             :                 struct discovery_entry_ctx *entry_ctx;
    7176           0 :                 struct nvme_path_id path = {};
    7177             : 
    7178           0 :                 entry_ctx = TAILQ_FIRST(&ctx->nvm_entry_ctxs);
    7179           0 :                 path.trid = entry_ctx->trid;
    7180           0 :                 bdev_nvme_delete(entry_ctx->name, &path, NULL, NULL);
    7181           0 :                 TAILQ_REMOVE(&ctx->nvm_entry_ctxs, entry_ctx, tailq);
    7182           0 :                 free(entry_ctx);
    7183             :         }
    7184             : 
    7185           0 :         while (!TAILQ_EMPTY(&ctx->discovery_entry_ctxs)) {
    7186             :                 struct discovery_entry_ctx *entry_ctx;
    7187             : 
    7188           0 :                 entry_ctx = TAILQ_FIRST(&ctx->discovery_entry_ctxs);
    7189           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, entry_ctx, tailq);
    7190           0 :                 free(entry_ctx);
    7191             :         }
    7192             : 
    7193           0 :         free(ctx->entry_ctx_in_use);
    7194           0 :         ctx->entry_ctx_in_use = NULL;
    7195           0 : }
    7196             : 
    7197             : static void
    7198           0 : stop_discovery(struct discovery_ctx *ctx, spdk_bdev_nvme_stop_discovery_fn cb_fn, void *cb_ctx)
    7199             : {
    7200           0 :         ctx->stop_cb_fn = cb_fn;
    7201           0 :         ctx->cb_ctx = cb_ctx;
    7202             : 
    7203           0 :         if (ctx->attach_in_progress > 0) {
    7204           0 :                 DISCOVERY_INFOLOG(ctx, "stopping discovery with attach_in_progress: %"PRIu32"\n",
    7205             :                                   ctx->attach_in_progress);
    7206           0 :         }
    7207             : 
    7208           0 :         _stop_discovery(ctx);
    7209           0 : }
    7210             : 
    7211             : static void
    7212           2 : remove_discovery_entry(struct nvme_ctrlr *nvme_ctrlr)
    7213             : {
    7214             :         struct discovery_ctx *d_ctx;
    7215             :         struct nvme_path_id *path_id;
    7216           2 :         struct spdk_nvme_transport_id trid = {};
    7217             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    7218             : 
    7219           2 :         path_id = TAILQ_FIRST(&nvme_ctrlr->trids);
    7220             : 
    7221           2 :         TAILQ_FOREACH(d_ctx, &g_discovery_ctxs, tailq) {
    7222           0 :                 TAILQ_FOREACH_SAFE(entry_ctx, &d_ctx->nvm_entry_ctxs, tailq, tmp) {
    7223           0 :                         build_trid_from_log_page_entry(&trid, &entry_ctx->entry);
    7224           0 :                         if (spdk_nvme_transport_id_compare(&trid, &path_id->trid) != 0) {
    7225           0 :                                 continue;
    7226             :                         }
    7227             : 
    7228           0 :                         TAILQ_REMOVE(&d_ctx->nvm_entry_ctxs, entry_ctx, tailq);
    7229           0 :                         free(entry_ctx);
    7230           0 :                         DISCOVERY_INFOLOG(d_ctx, "Remove discovery entry: %s:%s:%s\n",
    7231             :                                           trid.subnqn, trid.traddr, trid.trsvcid);
    7232             : 
    7233             :                         /* Fail discovery ctrlr to force reattach attempt */
    7234           0 :                         spdk_nvme_ctrlr_fail(d_ctx->ctrlr);
    7235           0 :                 }
    7236           0 :         }
    7237           2 : }
    7238             : 
    7239             : static void
    7240           0 : discovery_remove_controllers(struct discovery_ctx *ctx)
    7241             : {
    7242           0 :         struct spdk_nvmf_discovery_log_page *log_page = ctx->log_page;
    7243             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    7244             :         struct spdk_nvmf_discovery_log_page_entry *new_entry, *old_entry;
    7245           0 :         struct spdk_nvme_transport_id old_trid = {};
    7246             :         uint64_t numrec, i;
    7247             :         bool found;
    7248             : 
    7249           0 :         numrec = from_le64(&log_page->numrec);
    7250           0 :         TAILQ_FOREACH_SAFE(entry_ctx, &ctx->nvm_entry_ctxs, tailq, tmp) {
    7251           0 :                 found = false;
    7252           0 :                 old_entry = &entry_ctx->entry;
    7253           0 :                 build_trid_from_log_page_entry(&old_trid, old_entry);
    7254           0 :                 for (i = 0; i < numrec; i++) {
    7255           0 :                         new_entry = &log_page->entries[i];
    7256           0 :                         if (!memcmp(old_entry, new_entry, sizeof(*old_entry))) {
    7257           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s found again\n",
    7258             :                                                   old_trid.subnqn, old_trid.traddr, old_trid.trsvcid);
    7259           0 :                                 found = true;
    7260           0 :                                 break;
    7261             :                         }
    7262           0 :                 }
    7263           0 :                 if (!found) {
    7264           0 :                         struct nvme_path_id path = {};
    7265             : 
    7266           0 :                         DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s not found\n",
    7267             :                                           old_trid.subnqn, old_trid.traddr, old_trid.trsvcid);
    7268             : 
    7269           0 :                         path.trid = entry_ctx->trid;
    7270           0 :                         bdev_nvme_delete(entry_ctx->name, &path, NULL, NULL);
    7271           0 :                         TAILQ_REMOVE(&ctx->nvm_entry_ctxs, entry_ctx, tailq);
    7272           0 :                         free(entry_ctx);
    7273           0 :                 }
    7274           0 :         }
    7275           0 :         free(log_page);
    7276           0 :         ctx->log_page = NULL;
    7277           0 :         discovery_complete(ctx);
    7278           0 : }
    7279             : 
    7280             : static void
    7281           0 : complete_discovery_start(struct discovery_ctx *ctx, int status)
    7282             : {
    7283           0 :         ctx->timeout_ticks = 0;
    7284           0 :         ctx->rc = status;
    7285           0 :         if (ctx->start_cb_fn) {
    7286           0 :                 ctx->start_cb_fn(ctx->cb_ctx, status);
    7287           0 :                 ctx->start_cb_fn = NULL;
    7288           0 :                 ctx->cb_ctx = NULL;
    7289           0 :         }
    7290           0 : }
    7291             : 
    7292             : static void
    7293           0 : discovery_attach_controller_done(void *cb_ctx, size_t bdev_count, int rc)
    7294             : {
    7295           0 :         struct discovery_entry_ctx *entry_ctx = cb_ctx;
    7296           0 :         struct discovery_ctx *ctx = entry_ctx->ctx;
    7297             : 
    7298           0 :         DISCOVERY_INFOLOG(ctx, "attach %s done\n", entry_ctx->name);
    7299           0 :         ctx->attach_in_progress--;
    7300           0 :         if (ctx->attach_in_progress == 0) {
    7301           0 :                 complete_discovery_start(ctx, ctx->rc);
    7302           0 :                 if (ctx->initializing && ctx->rc != 0) {
    7303           0 :                         DISCOVERY_ERRLOG(ctx, "stopping discovery due to errors: %d\n", ctx->rc);
    7304           0 :                         stop_discovery(ctx, NULL, ctx->cb_ctx);
    7305           0 :                 } else {
    7306           0 :                         discovery_remove_controllers(ctx);
    7307             :                 }
    7308           0 :         }
    7309           0 : }
    7310             : 
    7311             : static struct discovery_entry_ctx *
    7312           0 : create_discovery_entry_ctx(struct discovery_ctx *ctx, struct spdk_nvme_transport_id *trid)
    7313             : {
    7314             :         struct discovery_entry_ctx *new_ctx;
    7315             : 
    7316           0 :         new_ctx = calloc(1, sizeof(*new_ctx));
    7317           0 :         if (new_ctx == NULL) {
    7318           0 :                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7319           0 :                 return NULL;
    7320             :         }
    7321             : 
    7322           0 :         new_ctx->ctx = ctx;
    7323           0 :         memcpy(&new_ctx->trid, trid, sizeof(*trid));
    7324           0 :         spdk_nvme_ctrlr_get_default_ctrlr_opts(&new_ctx->drv_opts, sizeof(new_ctx->drv_opts));
    7325           0 :         snprintf(new_ctx->drv_opts.hostnqn, sizeof(new_ctx->drv_opts.hostnqn), "%s", ctx->hostnqn);
    7326           0 :         return new_ctx;
    7327           0 : }
    7328             : 
    7329             : static void
    7330           0 : discovery_log_page_cb(void *cb_arg, int rc, const struct spdk_nvme_cpl *cpl,
    7331             :                       struct spdk_nvmf_discovery_log_page *log_page)
    7332             : {
    7333           0 :         struct discovery_ctx *ctx = cb_arg;
    7334             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    7335             :         struct spdk_nvmf_discovery_log_page_entry *new_entry, *old_entry;
    7336             :         uint64_t numrec, i;
    7337             :         bool found;
    7338             : 
    7339           0 :         if (rc || spdk_nvme_cpl_is_error(cpl)) {
    7340           0 :                 DISCOVERY_ERRLOG(ctx, "could not get discovery log page\n");
    7341           0 :                 return;
    7342             :         }
    7343             : 
    7344           0 :         ctx->log_page = log_page;
    7345           0 :         assert(ctx->attach_in_progress == 0);
    7346           0 :         numrec = from_le64(&log_page->numrec);
    7347           0 :         TAILQ_FOREACH_SAFE(entry_ctx, &ctx->discovery_entry_ctxs, tailq, tmp) {
    7348           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, entry_ctx, tailq);
    7349           0 :                 free(entry_ctx);
    7350           0 :         }
    7351           0 :         for (i = 0; i < numrec; i++) {
    7352           0 :                 found = false;
    7353           0 :                 new_entry = &log_page->entries[i];
    7354           0 :                 if (new_entry->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY_CURRENT ||
    7355           0 :                     new_entry->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY) {
    7356             :                         struct discovery_entry_ctx *new_ctx;
    7357           0 :                         struct spdk_nvme_transport_id trid = {};
    7358             : 
    7359           0 :                         build_trid_from_log_page_entry(&trid, new_entry);
    7360           0 :                         new_ctx = create_discovery_entry_ctx(ctx, &trid);
    7361           0 :                         if (new_ctx == NULL) {
    7362           0 :                                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7363           0 :                                 break;
    7364             :                         }
    7365             : 
    7366           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, new_ctx, tailq);
    7367           0 :                         continue;
    7368             :                 }
    7369           0 :                 TAILQ_FOREACH(entry_ctx, &ctx->nvm_entry_ctxs, tailq) {
    7370           0 :                         old_entry = &entry_ctx->entry;
    7371           0 :                         if (!memcmp(new_entry, old_entry, sizeof(*new_entry))) {
    7372           0 :                                 found = true;
    7373           0 :                                 break;
    7374             :                         }
    7375           0 :                 }
    7376           0 :                 if (!found) {
    7377           0 :                         struct discovery_entry_ctx *subnqn_ctx = NULL, *new_ctx;
    7378             :                         struct discovery_ctx *d_ctx;
    7379             : 
    7380           0 :                         TAILQ_FOREACH(d_ctx, &g_discovery_ctxs, tailq) {
    7381           0 :                                 TAILQ_FOREACH(subnqn_ctx, &d_ctx->nvm_entry_ctxs, tailq) {
    7382           0 :                                         if (!memcmp(subnqn_ctx->entry.subnqn, new_entry->subnqn,
    7383             :                                                     sizeof(new_entry->subnqn))) {
    7384           0 :                                                 break;
    7385             :                                         }
    7386           0 :                                 }
    7387           0 :                                 if (subnqn_ctx) {
    7388           0 :                                         break;
    7389             :                                 }
    7390           0 :                         }
    7391             : 
    7392           0 :                         new_ctx = calloc(1, sizeof(*new_ctx));
    7393           0 :                         if (new_ctx == NULL) {
    7394           0 :                                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7395           0 :                                 break;
    7396             :                         }
    7397             : 
    7398           0 :                         new_ctx->ctx = ctx;
    7399           0 :                         memcpy(&new_ctx->entry, new_entry, sizeof(*new_entry));
    7400           0 :                         build_trid_from_log_page_entry(&new_ctx->trid, new_entry);
    7401           0 :                         if (subnqn_ctx) {
    7402           0 :                                 snprintf(new_ctx->name, sizeof(new_ctx->name), "%s", subnqn_ctx->name);
    7403           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s new path for %s\n",
    7404             :                                                   new_ctx->trid.subnqn, new_ctx->trid.traddr, new_ctx->trid.trsvcid,
    7405             :                                                   new_ctx->name);
    7406           0 :                         } else {
    7407           0 :                                 snprintf(new_ctx->name, sizeof(new_ctx->name), "%s%d", ctx->name, ctx->index++);
    7408           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s new subsystem %s\n",
    7409             :                                                   new_ctx->trid.subnqn, new_ctx->trid.traddr, new_ctx->trid.trsvcid,
    7410             :                                                   new_ctx->name);
    7411             :                         }
    7412           0 :                         spdk_nvme_ctrlr_get_default_ctrlr_opts(&new_ctx->drv_opts, sizeof(new_ctx->drv_opts));
    7413           0 :                         snprintf(new_ctx->drv_opts.hostnqn, sizeof(new_ctx->drv_opts.hostnqn), "%s", ctx->hostnqn);
    7414           0 :                         rc = spdk_bdev_nvme_create(&new_ctx->trid, new_ctx->name, NULL, 0,
    7415           0 :                                                    discovery_attach_controller_done, new_ctx,
    7416           0 :                                                    &new_ctx->drv_opts, &ctx->bdev_opts);
    7417           0 :                         if (rc == 0) {
    7418           0 :                                 TAILQ_INSERT_TAIL(&ctx->nvm_entry_ctxs, new_ctx, tailq);
    7419           0 :                                 ctx->attach_in_progress++;
    7420           0 :                         } else {
    7421           0 :                                 DISCOVERY_ERRLOG(ctx, "spdk_bdev_nvme_create failed (%s)\n", spdk_strerror(-rc));
    7422             :                         }
    7423           0 :                 }
    7424           0 :         }
    7425             : 
    7426           0 :         if (ctx->attach_in_progress == 0) {
    7427           0 :                 discovery_remove_controllers(ctx);
    7428           0 :         }
    7429           0 : }
    7430             : 
    7431             : static void
    7432           0 : get_discovery_log_page(struct discovery_ctx *ctx)
    7433             : {
    7434             :         int rc;
    7435             : 
    7436           0 :         assert(ctx->in_progress == false);
    7437           0 :         ctx->in_progress = true;
    7438           0 :         rc = spdk_nvme_ctrlr_get_discovery_log_page(ctx->ctrlr, discovery_log_page_cb, ctx);
    7439           0 :         if (rc != 0) {
    7440           0 :                 DISCOVERY_ERRLOG(ctx, "could not get discovery log page\n");
    7441           0 :         }
    7442           0 :         DISCOVERY_INFOLOG(ctx, "sent discovery log page command\n");
    7443           0 : }
    7444             : 
    7445             : static void
    7446           0 : discovery_aer_cb(void *arg, const struct spdk_nvme_cpl *cpl)
    7447             : {
    7448           0 :         struct discovery_ctx *ctx = arg;
    7449           0 :         uint32_t log_page_id = (cpl->cdw0 & 0xFF0000) >> 16;
    7450             : 
    7451           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    7452           0 :                 DISCOVERY_ERRLOG(ctx, "aer failed\n");
    7453           0 :                 return;
    7454             :         }
    7455             : 
    7456           0 :         if (log_page_id != SPDK_NVME_LOG_DISCOVERY) {
    7457           0 :                 DISCOVERY_ERRLOG(ctx, "unexpected log page 0x%x\n", log_page_id);
    7458           0 :                 return;
    7459             :         }
    7460             : 
    7461           0 :         DISCOVERY_INFOLOG(ctx, "got aer\n");
    7462           0 :         if (ctx->in_progress) {
    7463           0 :                 ctx->pending = true;
    7464           0 :                 return;
    7465             :         }
    7466             : 
    7467           0 :         get_discovery_log_page(ctx);
    7468           0 : }
    7469             : 
    7470             : static void
    7471           0 : discovery_attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    7472             :                     struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
    7473             : {
    7474           0 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    7475             :         struct discovery_ctx *ctx;
    7476             : 
    7477           0 :         ctx = SPDK_CONTAINEROF(user_opts, struct discovery_ctx, drv_opts);
    7478             : 
    7479           0 :         DISCOVERY_INFOLOG(ctx, "discovery ctrlr attached\n");
    7480           0 :         ctx->probe_ctx = NULL;
    7481           0 :         ctx->ctrlr = ctrlr;
    7482             : 
    7483           0 :         if (ctx->rc != 0) {
    7484           0 :                 DISCOVERY_ERRLOG(ctx, "encountered error while attaching discovery ctrlr: %d\n",
    7485             :                                  ctx->rc);
    7486           0 :                 return;
    7487             :         }
    7488             : 
    7489           0 :         spdk_nvme_ctrlr_register_aer_callback(ctx->ctrlr, discovery_aer_cb, ctx);
    7490           0 : }
    7491             : 
    7492             : static int
    7493           0 : discovery_poller(void *arg)
    7494             : {
    7495           0 :         struct discovery_ctx *ctx = arg;
    7496             :         struct spdk_nvme_transport_id *trid;
    7497             :         int rc;
    7498             : 
    7499           0 :         if (ctx->detach_ctx) {
    7500           0 :                 rc = spdk_nvme_detach_poll_async(ctx->detach_ctx);
    7501           0 :                 if (rc != -EAGAIN) {
    7502           0 :                         ctx->detach_ctx = NULL;
    7503           0 :                         ctx->ctrlr = NULL;
    7504           0 :                 }
    7505           0 :         } else if (ctx->stop) {
    7506           0 :                 if (ctx->ctrlr != NULL) {
    7507           0 :                         rc = spdk_nvme_detach_async(ctx->ctrlr, &ctx->detach_ctx);
    7508           0 :                         if (rc == 0) {
    7509           0 :                                 return SPDK_POLLER_BUSY;
    7510             :                         }
    7511           0 :                         DISCOVERY_ERRLOG(ctx, "could not detach discovery ctrlr\n");
    7512           0 :                 }
    7513           0 :                 spdk_poller_unregister(&ctx->poller);
    7514           0 :                 TAILQ_REMOVE(&g_discovery_ctxs, ctx, tailq);
    7515           0 :                 assert(ctx->start_cb_fn == NULL);
    7516           0 :                 if (ctx->stop_cb_fn != NULL) {
    7517           0 :                         ctx->stop_cb_fn(ctx->cb_ctx);
    7518           0 :                 }
    7519           0 :                 free_discovery_ctx(ctx);
    7520           0 :         } else if (ctx->probe_ctx == NULL && ctx->ctrlr == NULL) {
    7521           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7522           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching discovery ctrlr\n");
    7523           0 :                         assert(ctx->initializing);
    7524           0 :                         spdk_poller_unregister(&ctx->poller);
    7525           0 :                         TAILQ_REMOVE(&g_discovery_ctxs, ctx, tailq);
    7526           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7527           0 :                         stop_discovery(ctx, NULL, NULL);
    7528           0 :                         free_discovery_ctx(ctx);
    7529           0 :                         return SPDK_POLLER_BUSY;
    7530             :                 }
    7531             : 
    7532           0 :                 assert(ctx->entry_ctx_in_use == NULL);
    7533           0 :                 ctx->entry_ctx_in_use = TAILQ_FIRST(&ctx->discovery_entry_ctxs);
    7534           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7535           0 :                 trid = &ctx->entry_ctx_in_use->trid;
    7536             : 
    7537             :                 /* All controllers must be configured explicitely either for multipath or failover.
    7538             :                  * While discovery use multipath mode, we need to set this in bdev options as well.
    7539             :                  */
    7540           0 :                 ctx->bdev_opts.multipath = true;
    7541             : 
    7542           0 :                 ctx->probe_ctx = spdk_nvme_connect_async(trid, &ctx->drv_opts, discovery_attach_cb);
    7543           0 :                 if (ctx->probe_ctx) {
    7544           0 :                         spdk_poller_unregister(&ctx->poller);
    7545           0 :                         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000);
    7546           0 :                 } else {
    7547           0 :                         DISCOVERY_ERRLOG(ctx, "could not start discovery connect\n");
    7548           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7549           0 :                         ctx->entry_ctx_in_use = NULL;
    7550             :                 }
    7551           0 :         } else if (ctx->probe_ctx) {
    7552           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7553           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching discovery ctrlr\n");
    7554           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7555           0 :                         return SPDK_POLLER_BUSY;
    7556             :                 }
    7557             : 
    7558           0 :                 rc = spdk_nvme_probe_poll_async(ctx->probe_ctx);
    7559           0 :                 if (rc != -EAGAIN) {
    7560           0 :                         if (ctx->rc != 0) {
    7561           0 :                                 assert(ctx->initializing);
    7562           0 :                                 stop_discovery(ctx, NULL, ctx->cb_ctx);
    7563           0 :                         } else {
    7564           0 :                                 assert(rc == 0);
    7565           0 :                                 DISCOVERY_INFOLOG(ctx, "discovery ctrlr connected\n");
    7566           0 :                                 ctx->rc = rc;
    7567           0 :                                 get_discovery_log_page(ctx);
    7568             :                         }
    7569           0 :                 }
    7570           0 :         } else {
    7571           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7572           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching NVM ctrlrs\n");
    7573           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7574             :                         /* We need to wait until all NVM ctrlrs are attached before we stop the
    7575             :                          * discovery service to make sure we don't detach a ctrlr that is still
    7576             :                          * being attached.
    7577             :                          */
    7578           0 :                         if (ctx->attach_in_progress == 0) {
    7579           0 :                                 stop_discovery(ctx, NULL, ctx->cb_ctx);
    7580           0 :                                 return SPDK_POLLER_BUSY;
    7581             :                         }
    7582           0 :                 }
    7583             : 
    7584           0 :                 rc = spdk_nvme_ctrlr_process_admin_completions(ctx->ctrlr);
    7585           0 :                 if (rc < 0) {
    7586           0 :                         spdk_poller_unregister(&ctx->poller);
    7587           0 :                         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000 * 1000);
    7588           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7589           0 :                         ctx->entry_ctx_in_use = NULL;
    7590             : 
    7591           0 :                         rc = spdk_nvme_detach_async(ctx->ctrlr, &ctx->detach_ctx);
    7592           0 :                         if (rc != 0) {
    7593           0 :                                 DISCOVERY_ERRLOG(ctx, "could not detach discovery ctrlr\n");
    7594           0 :                                 ctx->ctrlr = NULL;
    7595           0 :                         }
    7596           0 :                 }
    7597             :         }
    7598             : 
    7599           0 :         return SPDK_POLLER_BUSY;
    7600           0 : }
    7601             : 
    7602             : static void
    7603           0 : start_discovery_poller(void *arg)
    7604             : {
    7605           0 :         struct discovery_ctx *ctx = arg;
    7606             : 
    7607           0 :         TAILQ_INSERT_TAIL(&g_discovery_ctxs, ctx, tailq);
    7608           0 :         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000 * 1000);
    7609           0 : }
    7610             : 
    7611             : int
    7612           0 : bdev_nvme_start_discovery(struct spdk_nvme_transport_id *trid,
    7613             :                           const char *base_name,
    7614             :                           struct spdk_nvme_ctrlr_opts *drv_opts,
    7615             :                           struct spdk_bdev_nvme_ctrlr_opts *bdev_opts,
    7616             :                           uint64_t attach_timeout,
    7617             :                           bool from_mdns,
    7618             :                           spdk_bdev_nvme_start_discovery_fn cb_fn, void *cb_ctx)
    7619             : {
    7620             :         struct discovery_ctx *ctx;
    7621             :         struct discovery_entry_ctx *discovery_entry_ctx;
    7622             : 
    7623           0 :         snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
    7624           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7625           0 :                 if (strcmp(ctx->name, base_name) == 0) {
    7626           0 :                         return -EEXIST;
    7627             :                 }
    7628             : 
    7629           0 :                 if (ctx->entry_ctx_in_use != NULL) {
    7630           0 :                         if (!spdk_nvme_transport_id_compare(trid, &ctx->entry_ctx_in_use->trid)) {
    7631           0 :                                 return -EEXIST;
    7632             :                         }
    7633           0 :                 }
    7634             : 
    7635           0 :                 TAILQ_FOREACH(discovery_entry_ctx, &ctx->discovery_entry_ctxs, tailq) {
    7636           0 :                         if (!spdk_nvme_transport_id_compare(trid, &discovery_entry_ctx->trid)) {
    7637           0 :                                 return -EEXIST;
    7638             :                         }
    7639           0 :                 }
    7640           0 :         }
    7641             : 
    7642           0 :         ctx = calloc(1, sizeof(*ctx));
    7643           0 :         if (ctx == NULL) {
    7644           0 :                 return -ENOMEM;
    7645             :         }
    7646             : 
    7647           0 :         ctx->name = strdup(base_name);
    7648           0 :         if (ctx->name == NULL) {
    7649           0 :                 free_discovery_ctx(ctx);
    7650           0 :                 return -ENOMEM;
    7651             :         }
    7652           0 :         memcpy(&ctx->drv_opts, drv_opts, sizeof(*drv_opts));
    7653           0 :         memcpy(&ctx->bdev_opts, bdev_opts, sizeof(*bdev_opts));
    7654           0 :         ctx->from_mdns_discovery_service = from_mdns;
    7655           0 :         ctx->bdev_opts.from_discovery_service = true;
    7656           0 :         ctx->calling_thread = spdk_get_thread();
    7657           0 :         ctx->start_cb_fn = cb_fn;
    7658           0 :         ctx->cb_ctx = cb_ctx;
    7659           0 :         ctx->initializing = true;
    7660           0 :         if (ctx->start_cb_fn) {
    7661             :                 /* We can use this when dumping json to denote if this RPC parameter
    7662             :                  * was specified or not.
    7663             :                  */
    7664           0 :                 ctx->wait_for_attach = true;
    7665           0 :         }
    7666           0 :         if (attach_timeout != 0) {
    7667           0 :                 ctx->timeout_ticks = spdk_get_ticks() + attach_timeout *
    7668           0 :                                      spdk_get_ticks_hz() / 1000ull;
    7669           0 :         }
    7670           0 :         TAILQ_INIT(&ctx->nvm_entry_ctxs);
    7671           0 :         TAILQ_INIT(&ctx->discovery_entry_ctxs);
    7672           0 :         memcpy(&ctx->trid, trid, sizeof(*trid));
    7673             :         /* Even if user did not specify hostnqn, we can still strdup("\0"); */
    7674           0 :         ctx->hostnqn = strdup(ctx->drv_opts.hostnqn);
    7675           0 :         if (ctx->hostnqn == NULL) {
    7676           0 :                 free_discovery_ctx(ctx);
    7677           0 :                 return -ENOMEM;
    7678             :         }
    7679           0 :         discovery_entry_ctx = create_discovery_entry_ctx(ctx, trid);
    7680           0 :         if (discovery_entry_ctx == NULL) {
    7681           0 :                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7682           0 :                 free_discovery_ctx(ctx);
    7683           0 :                 return -ENOMEM;
    7684             :         }
    7685             : 
    7686           0 :         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, discovery_entry_ctx, tailq);
    7687           0 :         spdk_thread_send_msg(g_bdev_nvme_init_thread, start_discovery_poller, ctx);
    7688           0 :         return 0;
    7689           0 : }
    7690             : 
    7691             : int
    7692           0 : bdev_nvme_stop_discovery(const char *name, spdk_bdev_nvme_stop_discovery_fn cb_fn, void *cb_ctx)
    7693             : {
    7694             :         struct discovery_ctx *ctx;
    7695             : 
    7696           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7697           0 :                 if (strcmp(name, ctx->name) == 0) {
    7698           0 :                         if (ctx->stop) {
    7699           0 :                                 return -EALREADY;
    7700             :                         }
    7701             :                         /* If we're still starting the discovery service and ->rc is non-zero, we're
    7702             :                          * going to stop it as soon as we can
    7703             :                          */
    7704           0 :                         if (ctx->initializing && ctx->rc != 0) {
    7705           0 :                                 return -EALREADY;
    7706             :                         }
    7707           0 :                         stop_discovery(ctx, cb_fn, cb_ctx);
    7708           0 :                         return 0;
    7709             :                 }
    7710           0 :         }
    7711             : 
    7712           0 :         return -ENOENT;
    7713           0 : }
    7714             : 
    7715             : static int
    7716           1 : bdev_nvme_library_init(void)
    7717             : {
    7718           1 :         g_bdev_nvme_init_thread = spdk_get_thread();
    7719             : 
    7720           1 :         spdk_io_device_register(&g_nvme_bdev_ctrlrs, bdev_nvme_create_poll_group_cb,
    7721             :                                 bdev_nvme_destroy_poll_group_cb,
    7722             :                                 sizeof(struct nvme_poll_group),  "nvme_poll_groups");
    7723             : 
    7724           1 :         return 0;
    7725             : }
    7726             : 
    7727             : static void
    7728           1 : bdev_nvme_fini_destruct_ctrlrs(void)
    7729             : {
    7730             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    7731             :         struct nvme_ctrlr *nvme_ctrlr;
    7732             : 
    7733           1 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    7734           1 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
    7735           0 :                 TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    7736           0 :                         pthread_mutex_lock(&nvme_ctrlr->mutex);
    7737           0 :                         if (nvme_ctrlr->destruct) {
    7738             :                                 /* This controller's destruction was already started
    7739             :                                  * before the application started shutting down
    7740             :                                  */
    7741           0 :                                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    7742           0 :                                 continue;
    7743             :                         }
    7744           0 :                         nvme_ctrlr->destruct = true;
    7745           0 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    7746             : 
    7747           0 :                         spdk_thread_send_msg(nvme_ctrlr->thread, _nvme_ctrlr_destruct,
    7748           0 :                                              nvme_ctrlr);
    7749           0 :                 }
    7750           0 :         }
    7751             : 
    7752           1 :         g_bdev_nvme_module_finish = true;
    7753           1 :         if (TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    7754           1 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    7755           1 :                 spdk_io_device_unregister(&g_nvme_bdev_ctrlrs, NULL);
    7756           1 :                 spdk_bdev_module_fini_done();
    7757           1 :                 return;
    7758             :         }
    7759             : 
    7760           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    7761           1 : }
    7762             : 
    7763             : static void
    7764           0 : check_discovery_fini(void *arg)
    7765             : {
    7766           0 :         if (TAILQ_EMPTY(&g_discovery_ctxs)) {
    7767           0 :                 bdev_nvme_fini_destruct_ctrlrs();
    7768           0 :         }
    7769           0 : }
    7770             : 
    7771             : static void
    7772           1 : bdev_nvme_library_fini(void)
    7773             : {
    7774             :         struct nvme_probe_skip_entry *entry, *entry_tmp;
    7775             :         struct discovery_ctx *ctx;
    7776             : 
    7777           1 :         spdk_poller_unregister(&g_hotplug_poller);
    7778           1 :         free(g_hotplug_probe_ctx);
    7779           1 :         g_hotplug_probe_ctx = NULL;
    7780             : 
    7781           1 :         TAILQ_FOREACH_SAFE(entry, &g_skipped_nvme_ctrlrs, tailq, entry_tmp) {
    7782           0 :                 TAILQ_REMOVE(&g_skipped_nvme_ctrlrs, entry, tailq);
    7783           0 :                 free(entry);
    7784           0 :         }
    7785             : 
    7786           1 :         assert(spdk_get_thread() == g_bdev_nvme_init_thread);
    7787           1 :         if (TAILQ_EMPTY(&g_discovery_ctxs)) {
    7788           1 :                 bdev_nvme_fini_destruct_ctrlrs();
    7789           1 :         } else {
    7790           0 :                 TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7791           0 :                         stop_discovery(ctx, check_discovery_fini, NULL);
    7792           0 :                 }
    7793             :         }
    7794           1 : }
    7795             : 
    7796             : static void
    7797           0 : bdev_nvme_verify_pi_error(struct nvme_bdev_io *bio)
    7798             : {
    7799           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7800           0 :         struct spdk_bdev *bdev = bdev_io->bdev;
    7801             :         struct spdk_dif_ctx dif_ctx;
    7802           0 :         struct spdk_dif_error err_blk = {};
    7803             :         int rc;
    7804             :         struct spdk_dif_ctx_init_ext_opts dif_opts;
    7805             : 
    7806           0 :         dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
    7807           0 :         dif_opts.dif_pi_format = bdev->dif_pi_format;
    7808           0 :         rc = spdk_dif_ctx_init(&dif_ctx,
    7809           0 :                                bdev->blocklen, bdev->md_len, bdev->md_interleave,
    7810           0 :                                bdev->dif_is_head_of_md, bdev->dif_type,
    7811           0 :                                bdev_io->u.bdev.dif_check_flags,
    7812           0 :                                bdev_io->u.bdev.offset_blocks, 0, 0, 0, 0, &dif_opts);
    7813           0 :         if (rc != 0) {
    7814           0 :                 SPDK_ERRLOG("Initialization of DIF context failed\n");
    7815           0 :                 return;
    7816             :         }
    7817             : 
    7818           0 :         if (bdev->md_interleave) {
    7819           0 :                 rc = spdk_dif_verify(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    7820           0 :                                      bdev_io->u.bdev.num_blocks, &dif_ctx, &err_blk);
    7821           0 :         } else {
    7822           0 :                 struct iovec md_iov = {
    7823           0 :                         .iov_base       = bdev_io->u.bdev.md_buf,
    7824           0 :                         .iov_len        = bdev_io->u.bdev.num_blocks * bdev->md_len,
    7825             :                 };
    7826             : 
    7827           0 :                 rc = spdk_dix_verify(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    7828           0 :                                      &md_iov, bdev_io->u.bdev.num_blocks, &dif_ctx, &err_blk);
    7829             :         }
    7830             : 
    7831           0 :         if (rc != 0) {
    7832           0 :                 SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n",
    7833             :                             err_blk.err_type, err_blk.err_offset);
    7834           0 :         } else {
    7835           0 :                 SPDK_ERRLOG("Hardware reported PI error but SPDK could not find any.\n");
    7836             :         }
    7837           0 : }
    7838             : 
    7839             : static void
    7840           0 : bdev_nvme_no_pi_readv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7841             : {
    7842           0 :         struct nvme_bdev_io *bio = ref;
    7843             : 
    7844           0 :         if (spdk_nvme_cpl_is_success(cpl)) {
    7845             :                 /* Run PI verification for read data buffer. */
    7846           0 :                 bdev_nvme_verify_pi_error(bio);
    7847           0 :         }
    7848             : 
    7849             :         /* Return original completion status */
    7850           0 :         bdev_nvme_io_complete_nvme_status(bio, &bio->cpl);
    7851           0 : }
    7852             : 
    7853             : static void
    7854           3 : bdev_nvme_readv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7855             : {
    7856           3 :         struct nvme_bdev_io *bio = ref;
    7857           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7858             :         int ret;
    7859             : 
    7860           3 :         if (spdk_unlikely(spdk_nvme_cpl_is_pi_error(cpl))) {
    7861           0 :                 SPDK_ERRLOG("readv completed with PI error (sct=%d, sc=%d)\n",
    7862             :                             cpl->status.sct, cpl->status.sc);
    7863             : 
    7864             :                 /* Save completion status to use after verifying PI error. */
    7865           0 :                 bio->cpl = *cpl;
    7866             : 
    7867           0 :                 if (spdk_likely(nvme_io_path_is_available(bio->io_path))) {
    7868             :                         /* Read without PI checking to verify PI error. */
    7869           0 :                         ret = bdev_nvme_no_pi_readv(bio,
    7870           0 :                                                     bdev_io->u.bdev.iovs,
    7871           0 :                                                     bdev_io->u.bdev.iovcnt,
    7872           0 :                                                     bdev_io->u.bdev.md_buf,
    7873           0 :                                                     bdev_io->u.bdev.num_blocks,
    7874           0 :                                                     bdev_io->u.bdev.offset_blocks);
    7875           0 :                         if (ret == 0) {
    7876           0 :                                 return;
    7877             :                         }
    7878           0 :                 }
    7879           0 :         }
    7880             : 
    7881           3 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7882           3 : }
    7883             : 
    7884             : static void
    7885          25 : bdev_nvme_writev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7886             : {
    7887          25 :         struct nvme_bdev_io *bio = ref;
    7888             : 
    7889          25 :         if (spdk_unlikely(spdk_nvme_cpl_is_pi_error(cpl))) {
    7890           0 :                 SPDK_ERRLOG("writev completed with PI error (sct=%d, sc=%d)\n",
    7891             :                             cpl->status.sct, cpl->status.sc);
    7892             :                 /* Run PI verification for write data buffer if PI error is detected. */
    7893           0 :                 bdev_nvme_verify_pi_error(bio);
    7894           0 :         }
    7895             : 
    7896          25 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7897          25 : }
    7898             : 
    7899             : static void
    7900           0 : bdev_nvme_zone_appendv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7901             : {
    7902           0 :         struct nvme_bdev_io *bio = ref;
    7903           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7904             : 
    7905             :         /* spdk_bdev_io_get_append_location() requires that the ALBA is stored in offset_blocks.
    7906             :          * Additionally, offset_blocks has to be set before calling bdev_nvme_verify_pi_error().
    7907             :          */
    7908           0 :         bdev_io->u.bdev.offset_blocks = *(uint64_t *)&cpl->cdw0;
    7909             : 
    7910           0 :         if (spdk_nvme_cpl_is_pi_error(cpl)) {
    7911           0 :                 SPDK_ERRLOG("zone append completed with PI error (sct=%d, sc=%d)\n",
    7912             :                             cpl->status.sct, cpl->status.sc);
    7913             :                 /* Run PI verification for zone append data buffer if PI error is detected. */
    7914           0 :                 bdev_nvme_verify_pi_error(bio);
    7915           0 :         }
    7916             : 
    7917           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7918           0 : }
    7919             : 
    7920             : static void
    7921           1 : bdev_nvme_comparev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7922             : {
    7923           1 :         struct nvme_bdev_io *bio = ref;
    7924             : 
    7925           1 :         if (spdk_nvme_cpl_is_pi_error(cpl)) {
    7926           0 :                 SPDK_ERRLOG("comparev completed with PI error (sct=%d, sc=%d)\n",
    7927             :                             cpl->status.sct, cpl->status.sc);
    7928             :                 /* Run PI verification for compare data buffer if PI error is detected. */
    7929           0 :                 bdev_nvme_verify_pi_error(bio);
    7930           0 :         }
    7931             : 
    7932           1 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7933           1 : }
    7934             : 
    7935             : static void
    7936           4 : bdev_nvme_comparev_and_writev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7937             : {
    7938           4 :         struct nvme_bdev_io *bio = ref;
    7939             : 
    7940             :         /* Compare operation completion */
    7941           4 :         if (!bio->first_fused_completed) {
    7942             :                 /* Save compare result for write callback */
    7943           2 :                 bio->cpl = *cpl;
    7944           2 :                 bio->first_fused_completed = true;
    7945           2 :                 return;
    7946             :         }
    7947             : 
    7948             :         /* Write operation completion */
    7949           2 :         if (spdk_nvme_cpl_is_error(&bio->cpl)) {
    7950             :                 /* If bio->cpl is already an error, it means the compare operation failed.  In that case,
    7951             :                  * complete the IO with the compare operation's status.
    7952             :                  */
    7953           1 :                 if (!spdk_nvme_cpl_is_error(cpl)) {
    7954           1 :                         SPDK_ERRLOG("Unexpected write success after compare failure.\n");
    7955           1 :                 }
    7956             : 
    7957           1 :                 bdev_nvme_io_complete_nvme_status(bio, &bio->cpl);
    7958           1 :         } else {
    7959           1 :                 bdev_nvme_io_complete_nvme_status(bio, cpl);
    7960             :         }
    7961           4 : }
    7962             : 
    7963             : static void
    7964           1 : bdev_nvme_queued_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7965             : {
    7966           1 :         struct nvme_bdev_io *bio = ref;
    7967             : 
    7968           1 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7969           1 : }
    7970             : 
    7971             : static int
    7972           0 : fill_zone_from_report(struct spdk_bdev_zone_info *info, struct spdk_nvme_zns_zone_desc *desc)
    7973             : {
    7974           0 :         switch (desc->zt) {
    7975             :         case SPDK_NVME_ZONE_TYPE_SEQWR:
    7976           0 :                 info->type = SPDK_BDEV_ZONE_TYPE_SEQWR;
    7977           0 :                 break;
    7978             :         default:
    7979           0 :                 SPDK_ERRLOG("Invalid zone type: %#x in zone report\n", desc->zt);
    7980           0 :                 return -EIO;
    7981             :         }
    7982             : 
    7983           0 :         switch (desc->zs) {
    7984             :         case SPDK_NVME_ZONE_STATE_EMPTY:
    7985           0 :                 info->state = SPDK_BDEV_ZONE_STATE_EMPTY;
    7986           0 :                 break;
    7987             :         case SPDK_NVME_ZONE_STATE_IOPEN:
    7988           0 :                 info->state = SPDK_BDEV_ZONE_STATE_IMP_OPEN;
    7989           0 :                 break;
    7990             :         case SPDK_NVME_ZONE_STATE_EOPEN:
    7991           0 :                 info->state = SPDK_BDEV_ZONE_STATE_EXP_OPEN;
    7992           0 :                 break;
    7993             :         case SPDK_NVME_ZONE_STATE_CLOSED:
    7994           0 :                 info->state = SPDK_BDEV_ZONE_STATE_CLOSED;
    7995           0 :                 break;
    7996             :         case SPDK_NVME_ZONE_STATE_RONLY:
    7997           0 :                 info->state = SPDK_BDEV_ZONE_STATE_READ_ONLY;
    7998           0 :                 break;
    7999             :         case SPDK_NVME_ZONE_STATE_FULL:
    8000           0 :                 info->state = SPDK_BDEV_ZONE_STATE_FULL;
    8001           0 :                 break;
    8002             :         case SPDK_NVME_ZONE_STATE_OFFLINE:
    8003           0 :                 info->state = SPDK_BDEV_ZONE_STATE_OFFLINE;
    8004           0 :                 break;
    8005             :         default:
    8006           0 :                 SPDK_ERRLOG("Invalid zone state: %#x in zone report\n", desc->zs);
    8007           0 :                 return -EIO;
    8008             :         }
    8009             : 
    8010           0 :         info->zone_id = desc->zslba;
    8011           0 :         info->write_pointer = desc->wp;
    8012           0 :         info->capacity = desc->zcap;
    8013             : 
    8014           0 :         return 0;
    8015           0 : }
    8016             : 
    8017             : static void
    8018           0 : bdev_nvme_get_zone_info_done(void *ref, const struct spdk_nvme_cpl *cpl)
    8019             : {
    8020           0 :         struct nvme_bdev_io *bio = ref;
    8021           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8022           0 :         uint64_t zone_id = bdev_io->u.zone_mgmt.zone_id;
    8023           0 :         uint32_t zones_to_copy = bdev_io->u.zone_mgmt.num_zones;
    8024           0 :         struct spdk_bdev_zone_info *info = bdev_io->u.zone_mgmt.buf;
    8025             :         uint64_t max_zones_per_buf, i;
    8026             :         uint32_t zone_report_bufsize;
    8027             :         struct spdk_nvme_ns *ns;
    8028             :         struct spdk_nvme_qpair *qpair;
    8029             :         int ret;
    8030             : 
    8031           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    8032           0 :                 goto out_complete_io_nvme_cpl;
    8033             :         }
    8034             : 
    8035           0 :         if (spdk_unlikely(!nvme_io_path_is_available(bio->io_path))) {
    8036           0 :                 ret = -ENXIO;
    8037           0 :                 goto out_complete_io_ret;
    8038             :         }
    8039             : 
    8040           0 :         ns = bio->io_path->nvme_ns->ns;
    8041           0 :         qpair = bio->io_path->qpair->qpair;
    8042             : 
    8043           0 :         zone_report_bufsize = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8044           0 :         max_zones_per_buf = (zone_report_bufsize - sizeof(*bio->zone_report_buf)) /
    8045             :                             sizeof(bio->zone_report_buf->descs[0]);
    8046             : 
    8047           0 :         if (bio->zone_report_buf->nr_zones > max_zones_per_buf) {
    8048           0 :                 ret = -EINVAL;
    8049           0 :                 goto out_complete_io_ret;
    8050             :         }
    8051             : 
    8052           0 :         if (!bio->zone_report_buf->nr_zones) {
    8053           0 :                 ret = -EINVAL;
    8054           0 :                 goto out_complete_io_ret;
    8055             :         }
    8056             : 
    8057           0 :         for (i = 0; i < bio->zone_report_buf->nr_zones && bio->handled_zones < zones_to_copy; i++) {
    8058           0 :                 ret = fill_zone_from_report(&info[bio->handled_zones],
    8059           0 :                                             &bio->zone_report_buf->descs[i]);
    8060           0 :                 if (ret) {
    8061           0 :                         goto out_complete_io_ret;
    8062             :                 }
    8063           0 :                 bio->handled_zones++;
    8064           0 :         }
    8065             : 
    8066           0 :         if (bio->handled_zones < zones_to_copy) {
    8067           0 :                 uint64_t zone_size_lba = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    8068           0 :                 uint64_t slba = zone_id + (zone_size_lba * bio->handled_zones);
    8069             : 
    8070           0 :                 memset(bio->zone_report_buf, 0, zone_report_bufsize);
    8071           0 :                 ret = spdk_nvme_zns_report_zones(ns, qpair,
    8072           0 :                                                  bio->zone_report_buf, zone_report_bufsize,
    8073           0 :                                                  slba, SPDK_NVME_ZRA_LIST_ALL, true,
    8074           0 :                                                  bdev_nvme_get_zone_info_done, bio);
    8075           0 :                 if (!ret) {
    8076           0 :                         return;
    8077             :                 } else {
    8078           0 :                         goto out_complete_io_ret;
    8079             :                 }
    8080             :         }
    8081             : 
    8082             : out_complete_io_nvme_cpl:
    8083           0 :         free(bio->zone_report_buf);
    8084           0 :         bio->zone_report_buf = NULL;
    8085           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    8086           0 :         return;
    8087             : 
    8088             : out_complete_io_ret:
    8089           0 :         free(bio->zone_report_buf);
    8090           0 :         bio->zone_report_buf = NULL;
    8091           0 :         bdev_nvme_io_complete(bio, ret);
    8092           0 : }
    8093             : 
    8094             : static void
    8095           0 : bdev_nvme_zone_management_done(void *ref, const struct spdk_nvme_cpl *cpl)
    8096             : {
    8097           0 :         struct nvme_bdev_io *bio = ref;
    8098             : 
    8099           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    8100           0 : }
    8101             : 
    8102             : static void
    8103           4 : bdev_nvme_admin_passthru_complete_nvme_status(void *ctx)
    8104             : {
    8105           4 :         struct nvme_bdev_io *bio = ctx;
    8106           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8107           4 :         const struct spdk_nvme_cpl *cpl = &bio->cpl;
    8108             : 
    8109           4 :         assert(bdev_nvme_io_type_is_admin(bdev_io->type));
    8110             : 
    8111           4 :         __bdev_nvme_io_complete(bdev_io, 0, cpl);
    8112           4 : }
    8113             : 
    8114             : static void
    8115           3 : bdev_nvme_abort_complete(void *ctx)
    8116             : {
    8117           3 :         struct nvme_bdev_io *bio = ctx;
    8118           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8119             : 
    8120           3 :         if (spdk_nvme_cpl_is_abort_success(&bio->cpl)) {
    8121           3 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS, NULL);
    8122           3 :         } else {
    8123           0 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED, NULL);
    8124             :         }
    8125           3 : }
    8126             : 
    8127             : static void
    8128           3 : bdev_nvme_abort_done(void *ref, const struct spdk_nvme_cpl *cpl)
    8129             : {
    8130           3 :         struct nvme_bdev_io *bio = ref;
    8131           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8132             : 
    8133           3 :         bio->cpl = *cpl;
    8134           3 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io), bdev_nvme_abort_complete, bio);
    8135           3 : }
    8136             : 
    8137             : static void
    8138           4 : bdev_nvme_admin_passthru_done(void *ref, const struct spdk_nvme_cpl *cpl)
    8139             : {
    8140           4 :         struct nvme_bdev_io *bio = ref;
    8141           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8142             : 
    8143           4 :         bio->cpl = *cpl;
    8144           8 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    8145           4 :                              bdev_nvme_admin_passthru_complete_nvme_status, bio);
    8146           4 : }
    8147             : 
    8148             : static void
    8149           0 : bdev_nvme_queued_reset_sgl(void *ref, uint32_t sgl_offset)
    8150             : {
    8151           0 :         struct nvme_bdev_io *bio = ref;
    8152             :         struct iovec *iov;
    8153             : 
    8154           0 :         bio->iov_offset = sgl_offset;
    8155           0 :         for (bio->iovpos = 0; bio->iovpos < bio->iovcnt; bio->iovpos++) {
    8156           0 :                 iov = &bio->iovs[bio->iovpos];
    8157           0 :                 if (bio->iov_offset < iov->iov_len) {
    8158           0 :                         break;
    8159             :                 }
    8160             : 
    8161           0 :                 bio->iov_offset -= iov->iov_len;
    8162           0 :         }
    8163           0 : }
    8164             : 
    8165             : static int
    8166           0 : bdev_nvme_queued_next_sge(void *ref, void **address, uint32_t *length)
    8167             : {
    8168           0 :         struct nvme_bdev_io *bio = ref;
    8169             :         struct iovec *iov;
    8170             : 
    8171           0 :         assert(bio->iovpos < bio->iovcnt);
    8172             : 
    8173           0 :         iov = &bio->iovs[bio->iovpos];
    8174             : 
    8175           0 :         *address = iov->iov_base;
    8176           0 :         *length = iov->iov_len;
    8177             : 
    8178           0 :         if (bio->iov_offset) {
    8179           0 :                 assert(bio->iov_offset <= iov->iov_len);
    8180           0 :                 *address += bio->iov_offset;
    8181           0 :                 *length -= bio->iov_offset;
    8182           0 :         }
    8183             : 
    8184           0 :         bio->iov_offset += *length;
    8185           0 :         if (bio->iov_offset == iov->iov_len) {
    8186           0 :                 bio->iovpos++;
    8187           0 :                 bio->iov_offset = 0;
    8188           0 :         }
    8189             : 
    8190           0 :         return 0;
    8191             : }
    8192             : 
    8193             : static void
    8194           0 : bdev_nvme_queued_reset_fused_sgl(void *ref, uint32_t sgl_offset)
    8195             : {
    8196           0 :         struct nvme_bdev_io *bio = ref;
    8197             :         struct iovec *iov;
    8198             : 
    8199           0 :         bio->fused_iov_offset = sgl_offset;
    8200           0 :         for (bio->fused_iovpos = 0; bio->fused_iovpos < bio->fused_iovcnt; bio->fused_iovpos++) {
    8201           0 :                 iov = &bio->fused_iovs[bio->fused_iovpos];
    8202           0 :                 if (bio->fused_iov_offset < iov->iov_len) {
    8203           0 :                         break;
    8204             :                 }
    8205             : 
    8206           0 :                 bio->fused_iov_offset -= iov->iov_len;
    8207           0 :         }
    8208           0 : }
    8209             : 
    8210             : static int
    8211           0 : bdev_nvme_queued_next_fused_sge(void *ref, void **address, uint32_t *length)
    8212             : {
    8213           0 :         struct nvme_bdev_io *bio = ref;
    8214             :         struct iovec *iov;
    8215             : 
    8216           0 :         assert(bio->fused_iovpos < bio->fused_iovcnt);
    8217             : 
    8218           0 :         iov = &bio->fused_iovs[bio->fused_iovpos];
    8219             : 
    8220           0 :         *address = iov->iov_base;
    8221           0 :         *length = iov->iov_len;
    8222             : 
    8223           0 :         if (bio->fused_iov_offset) {
    8224           0 :                 assert(bio->fused_iov_offset <= iov->iov_len);
    8225           0 :                 *address += bio->fused_iov_offset;
    8226           0 :                 *length -= bio->fused_iov_offset;
    8227           0 :         }
    8228             : 
    8229           0 :         bio->fused_iov_offset += *length;
    8230           0 :         if (bio->fused_iov_offset == iov->iov_len) {
    8231           0 :                 bio->fused_iovpos++;
    8232           0 :                 bio->fused_iov_offset = 0;
    8233           0 :         }
    8234             : 
    8235           0 :         return 0;
    8236             : }
    8237             : 
    8238             : static int
    8239           0 : bdev_nvme_no_pi_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8240             :                       void *md, uint64_t lba_count, uint64_t lba)
    8241             : {
    8242             :         int rc;
    8243             : 
    8244           0 :         SPDK_DEBUGLOG(bdev_nvme, "read %" PRIu64 " blocks with offset %#" PRIx64 " without PI check\n",
    8245             :                       lba_count, lba);
    8246             : 
    8247           0 :         bio->iovs = iov;
    8248           0 :         bio->iovcnt = iovcnt;
    8249           0 :         bio->iovpos = 0;
    8250           0 :         bio->iov_offset = 0;
    8251             : 
    8252           0 :         rc = spdk_nvme_ns_cmd_readv_with_md(bio->io_path->nvme_ns->ns,
    8253           0 :                                             bio->io_path->qpair->qpair,
    8254           0 :                                             lba, lba_count,
    8255           0 :                                             bdev_nvme_no_pi_readv_done, bio, 0,
    8256             :                                             bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    8257           0 :                                             md, 0, 0);
    8258             : 
    8259           0 :         if (rc != 0 && rc != -ENOMEM) {
    8260           0 :                 SPDK_ERRLOG("no_pi_readv failed: rc = %d\n", rc);
    8261           0 :         }
    8262           0 :         return rc;
    8263             : }
    8264             : 
    8265             : static int
    8266           3 : bdev_nvme_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8267             :                 void *md, uint64_t lba_count, uint64_t lba, uint32_t flags,
    8268             :                 struct spdk_memory_domain *domain, void *domain_ctx,
    8269             :                 struct spdk_accel_sequence *seq)
    8270             : {
    8271           3 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8272           3 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8273             :         int rc;
    8274             : 
    8275           3 :         SPDK_DEBUGLOG(bdev_nvme, "read %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8276             :                       lba_count, lba);
    8277             : 
    8278           3 :         bio->iovs = iov;
    8279           3 :         bio->iovcnt = iovcnt;
    8280           3 :         bio->iovpos = 0;
    8281           3 :         bio->iov_offset = 0;
    8282             : 
    8283           3 :         if (domain != NULL || seq != NULL) {
    8284           1 :                 bio->ext_opts.size = SPDK_SIZEOF(&bio->ext_opts, accel_sequence);
    8285           1 :                 bio->ext_opts.memory_domain = domain;
    8286           1 :                 bio->ext_opts.memory_domain_ctx = domain_ctx;
    8287           1 :                 bio->ext_opts.io_flags = flags;
    8288           1 :                 bio->ext_opts.metadata = md;
    8289           1 :                 bio->ext_opts.accel_sequence = seq;
    8290             : 
    8291           1 :                 if (iovcnt == 1) {
    8292           2 :                         rc = spdk_nvme_ns_cmd_read_ext(ns, qpair, iov[0].iov_base, lba, lba_count, bdev_nvme_readv_done,
    8293           1 :                                                        bio, &bio->ext_opts);
    8294           1 :                 } else {
    8295           0 :                         rc = spdk_nvme_ns_cmd_readv_ext(ns, qpair, lba, lba_count,
    8296           0 :                                                         bdev_nvme_readv_done, bio,
    8297             :                                                         bdev_nvme_queued_reset_sgl,
    8298             :                                                         bdev_nvme_queued_next_sge,
    8299           0 :                                                         &bio->ext_opts);
    8300             :                 }
    8301           3 :         } else if (iovcnt == 1) {
    8302           4 :                 rc = spdk_nvme_ns_cmd_read_with_md(ns, qpair, iov[0].iov_base,
    8303           2 :                                                    md, lba, lba_count, bdev_nvme_readv_done,
    8304           2 :                                                    bio, flags, 0, 0);
    8305           2 :         } else {
    8306           0 :                 rc = spdk_nvme_ns_cmd_readv_with_md(ns, qpair, lba, lba_count,
    8307           0 :                                                     bdev_nvme_readv_done, bio, flags,
    8308             :                                                     bdev_nvme_queued_reset_sgl,
    8309           0 :                                                     bdev_nvme_queued_next_sge, md, 0, 0);
    8310             :         }
    8311             : 
    8312           3 :         if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    8313           0 :                 SPDK_ERRLOG("readv failed: rc = %d\n", rc);
    8314           0 :         }
    8315           3 :         return rc;
    8316             : }
    8317             : 
    8318             : static int
    8319          25 : bdev_nvme_writev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8320             :                  void *md, uint64_t lba_count, uint64_t lba, uint32_t flags,
    8321             :                  struct spdk_memory_domain *domain, void *domain_ctx,
    8322             :                  struct spdk_accel_sequence *seq,
    8323             :                  union spdk_bdev_nvme_cdw12 cdw12, union spdk_bdev_nvme_cdw13 cdw13)
    8324             : {
    8325          25 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8326          25 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8327             :         int rc;
    8328             : 
    8329          25 :         SPDK_DEBUGLOG(bdev_nvme, "write %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8330             :                       lba_count, lba);
    8331             : 
    8332          25 :         bio->iovs = iov;
    8333          25 :         bio->iovcnt = iovcnt;
    8334          25 :         bio->iovpos = 0;
    8335          25 :         bio->iov_offset = 0;
    8336             : 
    8337          25 :         if (domain != NULL || seq != NULL) {
    8338           0 :                 bio->ext_opts.size = SPDK_SIZEOF(&bio->ext_opts, accel_sequence);
    8339           0 :                 bio->ext_opts.memory_domain = domain;
    8340           0 :                 bio->ext_opts.memory_domain_ctx = domain_ctx;
    8341           0 :                 bio->ext_opts.io_flags = flags | SPDK_NVME_IO_FLAGS_DIRECTIVE(cdw12.write.dtype);
    8342           0 :                 bio->ext_opts.cdw13 = cdw13.raw;
    8343           0 :                 bio->ext_opts.metadata = md;
    8344           0 :                 bio->ext_opts.accel_sequence = seq;
    8345             : 
    8346           0 :                 if (iovcnt == 1) {
    8347           0 :                         rc = spdk_nvme_ns_cmd_write_ext(ns, qpair, iov[0].iov_base, lba, lba_count, bdev_nvme_writev_done,
    8348           0 :                                                         bio, &bio->ext_opts);
    8349           0 :                 } else {
    8350           0 :                         rc = spdk_nvme_ns_cmd_writev_ext(ns, qpair, lba, lba_count,
    8351           0 :                                                          bdev_nvme_writev_done, bio,
    8352             :                                                          bdev_nvme_queued_reset_sgl,
    8353             :                                                          bdev_nvme_queued_next_sge,
    8354           0 :                                                          &bio->ext_opts);
    8355             :                 }
    8356          25 :         } else if (iovcnt == 1) {
    8357          50 :                 rc = spdk_nvme_ns_cmd_write_with_md(ns, qpair, iov[0].iov_base,
    8358          25 :                                                     md, lba, lba_count, bdev_nvme_writev_done,
    8359          25 :                                                     bio, flags, 0, 0);
    8360          25 :         } else {
    8361           0 :                 rc = spdk_nvme_ns_cmd_writev_with_md(ns, qpair, lba, lba_count,
    8362           0 :                                                      bdev_nvme_writev_done, bio, flags,
    8363             :                                                      bdev_nvme_queued_reset_sgl,
    8364           0 :                                                      bdev_nvme_queued_next_sge, md, 0, 0);
    8365             :         }
    8366             : 
    8367          25 :         if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    8368           0 :                 SPDK_ERRLOG("writev failed: rc = %d\n", rc);
    8369           0 :         }
    8370          25 :         return rc;
    8371             : }
    8372             : 
    8373             : static int
    8374           0 : bdev_nvme_zone_appendv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8375             :                        void *md, uint64_t lba_count, uint64_t zslba,
    8376             :                        uint32_t flags)
    8377             : {
    8378           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8379           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8380             :         int rc;
    8381             : 
    8382           0 :         SPDK_DEBUGLOG(bdev_nvme, "zone append %" PRIu64 " blocks to zone start lba %#" PRIx64 "\n",
    8383             :                       lba_count, zslba);
    8384             : 
    8385           0 :         bio->iovs = iov;
    8386           0 :         bio->iovcnt = iovcnt;
    8387           0 :         bio->iovpos = 0;
    8388           0 :         bio->iov_offset = 0;
    8389             : 
    8390           0 :         if (iovcnt == 1) {
    8391           0 :                 rc = spdk_nvme_zns_zone_append_with_md(ns, qpair, iov[0].iov_base, md, zslba,
    8392           0 :                                                        lba_count,
    8393           0 :                                                        bdev_nvme_zone_appendv_done, bio,
    8394           0 :                                                        flags,
    8395             :                                                        0, 0);
    8396           0 :         } else {
    8397           0 :                 rc = spdk_nvme_zns_zone_appendv_with_md(ns, qpair, zslba, lba_count,
    8398           0 :                                                         bdev_nvme_zone_appendv_done, bio, flags,
    8399             :                                                         bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    8400           0 :                                                         md, 0, 0);
    8401             :         }
    8402             : 
    8403           0 :         if (rc != 0 && rc != -ENOMEM) {
    8404           0 :                 SPDK_ERRLOG("zone append failed: rc = %d\n", rc);
    8405           0 :         }
    8406           0 :         return rc;
    8407             : }
    8408             : 
    8409             : static int
    8410           1 : bdev_nvme_comparev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8411             :                    void *md, uint64_t lba_count, uint64_t lba,
    8412             :                    uint32_t flags)
    8413             : {
    8414             :         int rc;
    8415             : 
    8416           1 :         SPDK_DEBUGLOG(bdev_nvme, "compare %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8417             :                       lba_count, lba);
    8418             : 
    8419           1 :         bio->iovs = iov;
    8420           1 :         bio->iovcnt = iovcnt;
    8421           1 :         bio->iovpos = 0;
    8422           1 :         bio->iov_offset = 0;
    8423             : 
    8424           2 :         rc = spdk_nvme_ns_cmd_comparev_with_md(bio->io_path->nvme_ns->ns,
    8425           1 :                                                bio->io_path->qpair->qpair,
    8426           1 :                                                lba, lba_count,
    8427           1 :                                                bdev_nvme_comparev_done, bio, flags,
    8428             :                                                bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    8429           1 :                                                md, 0, 0);
    8430             : 
    8431           1 :         if (rc != 0 && rc != -ENOMEM) {
    8432           0 :                 SPDK_ERRLOG("comparev failed: rc = %d\n", rc);
    8433           0 :         }
    8434           1 :         return rc;
    8435             : }
    8436             : 
    8437             : static int
    8438           2 : bdev_nvme_comparev_and_writev(struct nvme_bdev_io *bio, struct iovec *cmp_iov, int cmp_iovcnt,
    8439             :                               struct iovec *write_iov, int write_iovcnt,
    8440             :                               void *md, uint64_t lba_count, uint64_t lba, uint32_t flags)
    8441             : {
    8442           2 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8443           2 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8444           2 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8445             :         int rc;
    8446             : 
    8447           2 :         SPDK_DEBUGLOG(bdev_nvme, "compare and write %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8448             :                       lba_count, lba);
    8449             : 
    8450           2 :         bio->iovs = cmp_iov;
    8451           2 :         bio->iovcnt = cmp_iovcnt;
    8452           2 :         bio->iovpos = 0;
    8453           2 :         bio->iov_offset = 0;
    8454           2 :         bio->fused_iovs = write_iov;
    8455           2 :         bio->fused_iovcnt = write_iovcnt;
    8456           2 :         bio->fused_iovpos = 0;
    8457           2 :         bio->fused_iov_offset = 0;
    8458             : 
    8459           2 :         if (bdev_io->num_retries == 0) {
    8460           2 :                 bio->first_fused_submitted = false;
    8461           2 :                 bio->first_fused_completed = false;
    8462           2 :         }
    8463             : 
    8464           2 :         if (!bio->first_fused_submitted) {
    8465           2 :                 flags |= SPDK_NVME_IO_FLAGS_FUSE_FIRST;
    8466           2 :                 memset(&bio->cpl, 0, sizeof(bio->cpl));
    8467             : 
    8468           4 :                 rc = spdk_nvme_ns_cmd_comparev_with_md(ns, qpair, lba, lba_count,
    8469           2 :                                                        bdev_nvme_comparev_and_writev_done, bio, flags,
    8470           2 :                                                        bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge, md, 0, 0);
    8471           2 :                 if (rc == 0) {
    8472           2 :                         bio->first_fused_submitted = true;
    8473           2 :                         flags &= ~SPDK_NVME_IO_FLAGS_FUSE_FIRST;
    8474           2 :                 } else {
    8475           0 :                         if (rc != -ENOMEM) {
    8476           0 :                                 SPDK_ERRLOG("compare failed: rc = %d\n", rc);
    8477           0 :                         }
    8478           0 :                         return rc;
    8479             :                 }
    8480           2 :         }
    8481             : 
    8482           2 :         flags |= SPDK_NVME_IO_FLAGS_FUSE_SECOND;
    8483             : 
    8484           4 :         rc = spdk_nvme_ns_cmd_writev_with_md(ns, qpair, lba, lba_count,
    8485           2 :                                              bdev_nvme_comparev_and_writev_done, bio, flags,
    8486           2 :                                              bdev_nvme_queued_reset_fused_sgl, bdev_nvme_queued_next_fused_sge, md, 0, 0);
    8487           2 :         if (rc != 0 && rc != -ENOMEM) {
    8488           0 :                 SPDK_ERRLOG("write failed: rc = %d\n", rc);
    8489           0 :                 rc = 0;
    8490           0 :         }
    8491             : 
    8492           2 :         return rc;
    8493           2 : }
    8494             : 
    8495             : static int
    8496           1 : bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks, uint64_t num_blocks)
    8497             : {
    8498             :         struct spdk_nvme_dsm_range dsm_ranges[SPDK_NVME_DATASET_MANAGEMENT_MAX_RANGES];
    8499             :         struct spdk_nvme_dsm_range *range;
    8500             :         uint64_t offset, remaining;
    8501             :         uint64_t num_ranges_u64;
    8502             :         uint16_t num_ranges;
    8503             :         int rc;
    8504             : 
    8505           1 :         num_ranges_u64 = (num_blocks + SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS - 1) /
    8506             :                          SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8507           1 :         if (num_ranges_u64 > SPDK_COUNTOF(dsm_ranges)) {
    8508           0 :                 SPDK_ERRLOG("Unmap request for %" PRIu64 " blocks is too large\n", num_blocks);
    8509           0 :                 return -EINVAL;
    8510             :         }
    8511           1 :         num_ranges = (uint16_t)num_ranges_u64;
    8512             : 
    8513           1 :         offset = offset_blocks;
    8514           1 :         remaining = num_blocks;
    8515           1 :         range = &dsm_ranges[0];
    8516             : 
    8517             :         /* Fill max-size ranges until the remaining blocks fit into one range */
    8518           1 :         while (remaining > SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS) {
    8519           0 :                 range->attributes.raw = 0;
    8520           0 :                 range->length = SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8521           0 :                 range->starting_lba = offset;
    8522             : 
    8523           0 :                 offset += SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8524           0 :                 remaining -= SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8525           0 :                 range++;
    8526             :         }
    8527             : 
    8528             :         /* Final range describes the remaining blocks */
    8529           1 :         range->attributes.raw = 0;
    8530           1 :         range->length = remaining;
    8531           1 :         range->starting_lba = offset;
    8532             : 
    8533           2 :         rc = spdk_nvme_ns_cmd_dataset_management(bio->io_path->nvme_ns->ns,
    8534           1 :                         bio->io_path->qpair->qpair,
    8535             :                         SPDK_NVME_DSM_ATTR_DEALLOCATE,
    8536           1 :                         dsm_ranges, num_ranges,
    8537           1 :                         bdev_nvme_queued_done, bio);
    8538             : 
    8539           1 :         return rc;
    8540           1 : }
    8541             : 
    8542             : static int
    8543           0 : bdev_nvme_write_zeroes(struct nvme_bdev_io *bio, uint64_t offset_blocks, uint64_t num_blocks)
    8544             : {
    8545           0 :         if (num_blocks > UINT16_MAX + 1) {
    8546           0 :                 SPDK_ERRLOG("NVMe write zeroes is limited to 16-bit block count\n");
    8547           0 :                 return -EINVAL;
    8548             :         }
    8549             : 
    8550           0 :         return spdk_nvme_ns_cmd_write_zeroes(bio->io_path->nvme_ns->ns,
    8551           0 :                                              bio->io_path->qpair->qpair,
    8552           0 :                                              offset_blocks, num_blocks,
    8553           0 :                                              bdev_nvme_queued_done, bio,
    8554             :                                              0);
    8555           0 : }
    8556             : 
    8557             : static int
    8558           0 : bdev_nvme_get_zone_info(struct nvme_bdev_io *bio, uint64_t zone_id, uint32_t num_zones,
    8559             :                         struct spdk_bdev_zone_info *info)
    8560             : {
    8561           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8562           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8563           0 :         uint32_t zone_report_bufsize = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8564           0 :         uint64_t zone_size = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    8565           0 :         uint64_t total_zones = spdk_nvme_zns_ns_get_num_zones(ns);
    8566             : 
    8567           0 :         if (zone_id % zone_size != 0) {
    8568           0 :                 return -EINVAL;
    8569             :         }
    8570             : 
    8571           0 :         if (num_zones > total_zones || !num_zones) {
    8572           0 :                 return -EINVAL;
    8573             :         }
    8574             : 
    8575           0 :         assert(!bio->zone_report_buf);
    8576           0 :         bio->zone_report_buf = calloc(1, zone_report_bufsize);
    8577           0 :         if (!bio->zone_report_buf) {
    8578           0 :                 return -ENOMEM;
    8579             :         }
    8580             : 
    8581           0 :         bio->handled_zones = 0;
    8582             : 
    8583           0 :         return spdk_nvme_zns_report_zones(ns, qpair, bio->zone_report_buf, zone_report_bufsize,
    8584           0 :                                           zone_id, SPDK_NVME_ZRA_LIST_ALL, true,
    8585           0 :                                           bdev_nvme_get_zone_info_done, bio);
    8586           0 : }
    8587             : 
    8588             : static int
    8589           0 : bdev_nvme_zone_management(struct nvme_bdev_io *bio, uint64_t zone_id,
    8590             :                           enum spdk_bdev_zone_action action)
    8591             : {
    8592           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8593           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8594             : 
    8595           0 :         switch (action) {
    8596             :         case SPDK_BDEV_ZONE_CLOSE:
    8597           0 :                 return spdk_nvme_zns_close_zone(ns, qpair, zone_id, false,
    8598           0 :                                                 bdev_nvme_zone_management_done, bio);
    8599             :         case SPDK_BDEV_ZONE_FINISH:
    8600           0 :                 return spdk_nvme_zns_finish_zone(ns, qpair, zone_id, false,
    8601           0 :                                                  bdev_nvme_zone_management_done, bio);
    8602             :         case SPDK_BDEV_ZONE_OPEN:
    8603           0 :                 return spdk_nvme_zns_open_zone(ns, qpair, zone_id, false,
    8604           0 :                                                bdev_nvme_zone_management_done, bio);
    8605             :         case SPDK_BDEV_ZONE_RESET:
    8606           0 :                 return spdk_nvme_zns_reset_zone(ns, qpair, zone_id, false,
    8607           0 :                                                 bdev_nvme_zone_management_done, bio);
    8608             :         case SPDK_BDEV_ZONE_OFFLINE:
    8609           0 :                 return spdk_nvme_zns_offline_zone(ns, qpair, zone_id, false,
    8610           0 :                                                   bdev_nvme_zone_management_done, bio);
    8611             :         default:
    8612           0 :                 return -EINVAL;
    8613             :         }
    8614           0 : }
    8615             : 
    8616             : static void
    8617           5 : bdev_nvme_admin_passthru(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio,
    8618             :                          struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes)
    8619             : {
    8620             :         struct nvme_io_path *io_path;
    8621             :         struct nvme_ctrlr *nvme_ctrlr;
    8622             :         uint32_t max_xfer_size;
    8623           5 :         int rc = -ENXIO;
    8624             : 
    8625             :         /* Choose the first ctrlr which is not failed. */
    8626           8 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    8627           7 :                 nvme_ctrlr = io_path->qpair->ctrlr;
    8628             : 
    8629             :                 /* We should skip any unavailable nvme_ctrlr rather than checking
    8630             :                  * if the return value of spdk_nvme_ctrlr_cmd_admin_raw() is -ENXIO.
    8631             :                  */
    8632           7 :                 if (!nvme_ctrlr_is_available(nvme_ctrlr)) {
    8633           3 :                         continue;
    8634             :                 }
    8635             : 
    8636           4 :                 max_xfer_size = spdk_nvme_ctrlr_get_max_xfer_size(nvme_ctrlr->ctrlr);
    8637             : 
    8638           4 :                 if (nbytes > max_xfer_size) {
    8639           0 :                         SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8640           0 :                         rc = -EINVAL;
    8641           0 :                         goto err;
    8642             :                 }
    8643             : 
    8644           8 :                 rc = spdk_nvme_ctrlr_cmd_admin_raw(nvme_ctrlr->ctrlr, cmd, buf, (uint32_t)nbytes,
    8645           4 :                                                    bdev_nvme_admin_passthru_done, bio);
    8646           4 :                 if (rc == 0) {
    8647           4 :                         return;
    8648             :                 }
    8649           1 :         }
    8650             : 
    8651             : err:
    8652           1 :         bdev_nvme_admin_complete(bio, rc);
    8653           5 : }
    8654             : 
    8655             : static int
    8656           0 : bdev_nvme_io_passthru(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
    8657             :                       void *buf, size_t nbytes)
    8658             : {
    8659           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8660           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8661           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8662           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8663             : 
    8664           0 :         if (nbytes > max_xfer_size) {
    8665           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8666           0 :                 return -EINVAL;
    8667             :         }
    8668             : 
    8669             :         /*
    8670             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands require a nsid,
    8671             :          * so fill it out automatically.
    8672             :          */
    8673           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8674             : 
    8675           0 :         return spdk_nvme_ctrlr_cmd_io_raw(ctrlr, qpair, cmd, buf,
    8676           0 :                                           (uint32_t)nbytes, bdev_nvme_queued_done, bio);
    8677           0 : }
    8678             : 
    8679             : static int
    8680           0 : bdev_nvme_io_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
    8681             :                          void *buf, size_t nbytes, void *md_buf, size_t md_len)
    8682             : {
    8683           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8684           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8685           0 :         size_t nr_sectors = nbytes / spdk_nvme_ns_get_extended_sector_size(ns);
    8686           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8687           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8688             : 
    8689           0 :         if (nbytes > max_xfer_size) {
    8690           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8691           0 :                 return -EINVAL;
    8692             :         }
    8693             : 
    8694           0 :         if (md_len != nr_sectors * spdk_nvme_ns_get_md_size(ns)) {
    8695           0 :                 SPDK_ERRLOG("invalid meta data buffer size\n");
    8696           0 :                 return -EINVAL;
    8697             :         }
    8698             : 
    8699             :         /*
    8700             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands require a nsid,
    8701             :          * so fill it out automatically.
    8702             :          */
    8703           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8704             : 
    8705           0 :         return spdk_nvme_ctrlr_cmd_io_raw_with_md(ctrlr, qpair, cmd, buf,
    8706           0 :                         (uint32_t)nbytes, md_buf, bdev_nvme_queued_done, bio);
    8707           0 : }
    8708             : 
    8709             : static int
    8710           0 : bdev_nvme_iov_passthru_md(struct nvme_bdev_io *bio,
    8711             :                           struct spdk_nvme_cmd *cmd, struct iovec *iov, int iovcnt,
    8712             :                           size_t nbytes, void *md_buf, size_t md_len)
    8713             : {
    8714           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8715           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8716           0 :         size_t nr_sectors = nbytes / spdk_nvme_ns_get_extended_sector_size(ns);
    8717           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8718           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8719             : 
    8720           0 :         bio->iovs = iov;
    8721           0 :         bio->iovcnt = iovcnt;
    8722           0 :         bio->iovpos = 0;
    8723           0 :         bio->iov_offset = 0;
    8724             : 
    8725           0 :         if (nbytes > max_xfer_size) {
    8726           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8727           0 :                 return -EINVAL;
    8728             :         }
    8729             : 
    8730           0 :         if (md_len != nr_sectors * spdk_nvme_ns_get_md_size(ns)) {
    8731           0 :                 SPDK_ERRLOG("invalid meta data buffer size\n");
    8732           0 :                 return -EINVAL;
    8733             :         }
    8734             : 
    8735             :         /*
    8736             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands
    8737             :          * require a nsid, so fill it out automatically.
    8738             :          */
    8739           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8740             : 
    8741           0 :         return spdk_nvme_ctrlr_cmd_iov_raw_with_md(
    8742           0 :                        ctrlr, qpair, cmd, (uint32_t)nbytes, md_buf, bdev_nvme_queued_done, bio,
    8743             :                        bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge);
    8744           0 : }
    8745             : 
    8746             : static void
    8747           6 : bdev_nvme_abort(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio,
    8748             :                 struct nvme_bdev_io *bio_to_abort)
    8749             : {
    8750             :         struct nvme_io_path *io_path;
    8751           6 :         int rc = 0;
    8752             : 
    8753           6 :         rc = bdev_nvme_abort_retry_io(nbdev_ch, bio_to_abort);
    8754           6 :         if (rc == 0) {
    8755           1 :                 bdev_nvme_admin_complete(bio, 0);
    8756           1 :                 return;
    8757             :         }
    8758             : 
    8759           5 :         io_path = bio_to_abort->io_path;
    8760           5 :         if (io_path != NULL) {
    8761           6 :                 rc = spdk_nvme_ctrlr_cmd_abort_ext(io_path->qpair->ctrlr->ctrlr,
    8762           3 :                                                    io_path->qpair->qpair,
    8763           3 :                                                    bio_to_abort,
    8764           3 :                                                    bdev_nvme_abort_done, bio);
    8765           3 :         } else {
    8766           3 :                 STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    8767           4 :                         rc = spdk_nvme_ctrlr_cmd_abort_ext(io_path->qpair->ctrlr->ctrlr,
    8768             :                                                            NULL,
    8769           2 :                                                            bio_to_abort,
    8770           2 :                                                            bdev_nvme_abort_done, bio);
    8771             : 
    8772           2 :                         if (rc != -ENOENT) {
    8773           1 :                                 break;
    8774             :                         }
    8775           1 :                 }
    8776             :         }
    8777             : 
    8778           5 :         if (rc != 0) {
    8779             :                 /* If no command was found or there was any error, complete the abort
    8780             :                  * request with failure.
    8781             :                  */
    8782           2 :                 bdev_nvme_admin_complete(bio, rc);
    8783           2 :         }
    8784           6 : }
    8785             : 
    8786             : static int
    8787           0 : bdev_nvme_copy(struct nvme_bdev_io *bio, uint64_t dst_offset_blocks, uint64_t src_offset_blocks,
    8788             :                uint64_t num_blocks)
    8789             : {
    8790           0 :         struct spdk_nvme_scc_source_range range = {
    8791           0 :                 .slba = src_offset_blocks,
    8792           0 :                 .nlb = num_blocks - 1
    8793             :         };
    8794             : 
    8795           0 :         return spdk_nvme_ns_cmd_copy(bio->io_path->nvme_ns->ns,
    8796           0 :                                      bio->io_path->qpair->qpair,
    8797           0 :                                      &range, 1, dst_offset_blocks,
    8798           0 :                                      bdev_nvme_queued_done, bio);
    8799             : }
    8800             : 
    8801             : static void
    8802           0 : bdev_nvme_opts_config_json(struct spdk_json_write_ctx *w)
    8803             : {
    8804             :         const char *action;
    8805             :         uint32_t i;
    8806             : 
    8807           0 :         if (g_opts.action_on_timeout == SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET) {
    8808           0 :                 action = "reset";
    8809           0 :         } else if (g_opts.action_on_timeout == SPDK_BDEV_NVME_TIMEOUT_ACTION_ABORT) {
    8810           0 :                 action = "abort";
    8811           0 :         } else {
    8812           0 :                 action = "none";
    8813             :         }
    8814             : 
    8815           0 :         spdk_json_write_object_begin(w);
    8816             : 
    8817           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_set_options");
    8818             : 
    8819           0 :         spdk_json_write_named_object_begin(w, "params");
    8820           0 :         spdk_json_write_named_string(w, "action_on_timeout", action);
    8821           0 :         spdk_json_write_named_uint64(w, "timeout_us", g_opts.timeout_us);
    8822           0 :         spdk_json_write_named_uint64(w, "timeout_admin_us", g_opts.timeout_admin_us);
    8823           0 :         spdk_json_write_named_uint32(w, "keep_alive_timeout_ms", g_opts.keep_alive_timeout_ms);
    8824           0 :         spdk_json_write_named_uint32(w, "arbitration_burst", g_opts.arbitration_burst);
    8825           0 :         spdk_json_write_named_uint32(w, "low_priority_weight", g_opts.low_priority_weight);
    8826           0 :         spdk_json_write_named_uint32(w, "medium_priority_weight", g_opts.medium_priority_weight);
    8827           0 :         spdk_json_write_named_uint32(w, "high_priority_weight", g_opts.high_priority_weight);
    8828           0 :         spdk_json_write_named_uint64(w, "nvme_adminq_poll_period_us", g_opts.nvme_adminq_poll_period_us);
    8829           0 :         spdk_json_write_named_uint64(w, "nvme_ioq_poll_period_us", g_opts.nvme_ioq_poll_period_us);
    8830           0 :         spdk_json_write_named_uint32(w, "io_queue_requests", g_opts.io_queue_requests);
    8831           0 :         spdk_json_write_named_bool(w, "delay_cmd_submit", g_opts.delay_cmd_submit);
    8832           0 :         spdk_json_write_named_uint32(w, "transport_retry_count", g_opts.transport_retry_count);
    8833           0 :         spdk_json_write_named_int32(w, "bdev_retry_count", g_opts.bdev_retry_count);
    8834           0 :         spdk_json_write_named_uint8(w, "transport_ack_timeout", g_opts.transport_ack_timeout);
    8835           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", g_opts.ctrlr_loss_timeout_sec);
    8836           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", g_opts.reconnect_delay_sec);
    8837           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec", g_opts.fast_io_fail_timeout_sec);
    8838           0 :         spdk_json_write_named_bool(w, "disable_auto_failback", g_opts.disable_auto_failback);
    8839           0 :         spdk_json_write_named_bool(w, "generate_uuids", g_opts.generate_uuids);
    8840           0 :         spdk_json_write_named_uint8(w, "transport_tos", g_opts.transport_tos);
    8841           0 :         spdk_json_write_named_bool(w, "nvme_error_stat", g_opts.nvme_error_stat);
    8842           0 :         spdk_json_write_named_uint32(w, "rdma_srq_size", g_opts.rdma_srq_size);
    8843           0 :         spdk_json_write_named_bool(w, "io_path_stat", g_opts.io_path_stat);
    8844           0 :         spdk_json_write_named_bool(w, "allow_accel_sequence", g_opts.allow_accel_sequence);
    8845           0 :         spdk_json_write_named_uint32(w, "rdma_max_cq_size", g_opts.rdma_max_cq_size);
    8846           0 :         spdk_json_write_named_uint16(w, "rdma_cm_event_timeout_ms", g_opts.rdma_cm_event_timeout_ms);
    8847           0 :         spdk_json_write_named_array_begin(w, "dhchap_digests");
    8848           0 :         for (i = 0; i < 32; ++i) {
    8849           0 :                 if (g_opts.dhchap_digests & SPDK_BIT(i)) {
    8850           0 :                         spdk_json_write_string(w, spdk_nvme_dhchap_get_digest_name(i));
    8851           0 :                 }
    8852           0 :         }
    8853           0 :         spdk_json_write_array_end(w);
    8854           0 :         spdk_json_write_named_array_begin(w, "dhchap_dhgroups");
    8855           0 :         for (i = 0; i < 32; ++i) {
    8856           0 :                 if (g_opts.dhchap_dhgroups & SPDK_BIT(i)) {
    8857           0 :                         spdk_json_write_string(w, spdk_nvme_dhchap_get_dhgroup_name(i));
    8858           0 :                 }
    8859           0 :         }
    8860             : 
    8861           0 :         spdk_json_write_array_end(w);
    8862           0 :         spdk_json_write_object_end(w);
    8863             : 
    8864           0 :         spdk_json_write_object_end(w);
    8865           0 : }
    8866             : 
    8867             : static void
    8868           0 : bdev_nvme_discovery_config_json(struct spdk_json_write_ctx *w, struct discovery_ctx *ctx)
    8869             : {
    8870             :         struct spdk_nvme_transport_id trid;
    8871             : 
    8872           0 :         spdk_json_write_object_begin(w);
    8873             : 
    8874           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_start_discovery");
    8875             : 
    8876           0 :         spdk_json_write_named_object_begin(w, "params");
    8877           0 :         spdk_json_write_named_string(w, "name", ctx->name);
    8878           0 :         spdk_json_write_named_string(w, "hostnqn", ctx->hostnqn);
    8879             : 
    8880           0 :         trid = ctx->trid;
    8881           0 :         memset(trid.subnqn, 0, sizeof(trid.subnqn));
    8882           0 :         nvme_bdev_dump_trid_json(&trid, w);
    8883             : 
    8884           0 :         spdk_json_write_named_bool(w, "wait_for_attach", ctx->wait_for_attach);
    8885           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", ctx->bdev_opts.ctrlr_loss_timeout_sec);
    8886           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", ctx->bdev_opts.reconnect_delay_sec);
    8887           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec",
    8888           0 :                                      ctx->bdev_opts.fast_io_fail_timeout_sec);
    8889           0 :         spdk_json_write_object_end(w);
    8890             : 
    8891           0 :         spdk_json_write_object_end(w);
    8892           0 : }
    8893             : 
    8894             : #ifdef SPDK_CONFIG_NVME_CUSE
    8895             : static void
    8896             : nvme_ctrlr_cuse_config_json(struct spdk_json_write_ctx *w,
    8897             :                             struct nvme_ctrlr *nvme_ctrlr)
    8898             : {
    8899             :         size_t cuse_name_size = 128;
    8900             :         char cuse_name[cuse_name_size];
    8901             : 
    8902             :         if (spdk_nvme_cuse_get_ctrlr_name(nvme_ctrlr->ctrlr,
    8903             :                                           cuse_name, &cuse_name_size) != 0) {
    8904             :                 return;
    8905             :         }
    8906             : 
    8907             :         spdk_json_write_object_begin(w);
    8908             : 
    8909             :         spdk_json_write_named_string(w, "method", "bdev_nvme_cuse_register");
    8910             : 
    8911             :         spdk_json_write_named_object_begin(w, "params");
    8912             :         spdk_json_write_named_string(w, "name", nvme_ctrlr->nbdev_ctrlr->name);
    8913             :         spdk_json_write_object_end(w);
    8914             : 
    8915             :         spdk_json_write_object_end(w);
    8916             : }
    8917             : #endif
    8918             : 
    8919             : static void
    8920           0 : nvme_ctrlr_config_json(struct spdk_json_write_ctx *w,
    8921             :                        struct nvme_ctrlr *nvme_ctrlr,
    8922             :                        struct nvme_path_id *path_id)
    8923             : {
    8924             :         struct spdk_nvme_transport_id   *trid;
    8925             :         const struct spdk_nvme_ctrlr_opts *opts;
    8926             : 
    8927           0 :         if (nvme_ctrlr->opts.from_discovery_service) {
    8928             :                 /* Do not emit an RPC for this - it will be implicitly
    8929             :                  * covered by a separate bdev_nvme_start_discovery or
    8930             :                  * bdev_nvme_start_mdns_discovery RPC.
    8931             :                  */
    8932           0 :                 return;
    8933             :         }
    8934             : 
    8935           0 :         trid = &path_id->trid;
    8936             : 
    8937           0 :         spdk_json_write_object_begin(w);
    8938             : 
    8939           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_attach_controller");
    8940             : 
    8941           0 :         spdk_json_write_named_object_begin(w, "params");
    8942           0 :         spdk_json_write_named_string(w, "name", nvme_ctrlr->nbdev_ctrlr->name);
    8943           0 :         nvme_bdev_dump_trid_json(trid, w);
    8944           0 :         spdk_json_write_named_bool(w, "prchk_reftag",
    8945           0 :                                    (nvme_ctrlr->opts.prchk_flags & SPDK_NVME_IO_FLAGS_PRCHK_REFTAG) != 0);
    8946           0 :         spdk_json_write_named_bool(w, "prchk_guard",
    8947           0 :                                    (nvme_ctrlr->opts.prchk_flags & SPDK_NVME_IO_FLAGS_PRCHK_GUARD) != 0);
    8948           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", nvme_ctrlr->opts.ctrlr_loss_timeout_sec);
    8949           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", nvme_ctrlr->opts.reconnect_delay_sec);
    8950           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec",
    8951           0 :                                      nvme_ctrlr->opts.fast_io_fail_timeout_sec);
    8952           0 :         if (nvme_ctrlr->psk != NULL) {
    8953           0 :                 spdk_json_write_named_string(w, "psk", spdk_key_get_name(nvme_ctrlr->psk));
    8954           0 :         }
    8955           0 :         if (nvme_ctrlr->dhchap_key != NULL) {
    8956           0 :                 spdk_json_write_named_string(w, "dhchap_key",
    8957           0 :                                              spdk_key_get_name(nvme_ctrlr->dhchap_key));
    8958           0 :         }
    8959           0 :         if (nvme_ctrlr->dhchap_ctrlr_key != NULL) {
    8960           0 :                 spdk_json_write_named_string(w, "dhchap_ctrlr_key",
    8961           0 :                                              spdk_key_get_name(nvme_ctrlr->dhchap_ctrlr_key));
    8962           0 :         }
    8963           0 :         opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
    8964           0 :         spdk_json_write_named_string(w, "hostnqn", opts->hostnqn);
    8965           0 :         spdk_json_write_named_bool(w, "hdgst", opts->header_digest);
    8966           0 :         spdk_json_write_named_bool(w, "ddgst", opts->data_digest);
    8967           0 :         if (opts->src_addr[0] != '\0') {
    8968           0 :                 spdk_json_write_named_string(w, "hostaddr", opts->src_addr);
    8969           0 :         }
    8970           0 :         if (opts->src_svcid[0] != '\0') {
    8971           0 :                 spdk_json_write_named_string(w, "hostsvcid", opts->src_svcid);
    8972           0 :         }
    8973             : 
    8974           0 :         if (nvme_ctrlr->opts.multipath) {
    8975           0 :                 spdk_json_write_named_string(w, "multipath", "multipath");
    8976           0 :         }
    8977           0 :         spdk_json_write_object_end(w);
    8978             : 
    8979           0 :         spdk_json_write_object_end(w);
    8980           0 : }
    8981             : 
    8982             : static void
    8983           0 : bdev_nvme_hotplug_config_json(struct spdk_json_write_ctx *w)
    8984             : {
    8985           0 :         spdk_json_write_object_begin(w);
    8986           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_set_hotplug");
    8987             : 
    8988           0 :         spdk_json_write_named_object_begin(w, "params");
    8989           0 :         spdk_json_write_named_uint64(w, "period_us", g_nvme_hotplug_poll_period_us);
    8990           0 :         spdk_json_write_named_bool(w, "enable", g_nvme_hotplug_enabled);
    8991           0 :         spdk_json_write_object_end(w);
    8992             : 
    8993           0 :         spdk_json_write_object_end(w);
    8994           0 : }
    8995             : 
    8996             : static int
    8997           0 : bdev_nvme_config_json(struct spdk_json_write_ctx *w)
    8998             : {
    8999             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
    9000             :         struct nvme_ctrlr       *nvme_ctrlr;
    9001             :         struct discovery_ctx    *ctx;
    9002             :         struct nvme_path_id     *path_id;
    9003             : 
    9004           0 :         bdev_nvme_opts_config_json(w);
    9005             : 
    9006           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    9007             : 
    9008           0 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
    9009           0 :                 TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    9010           0 :                         path_id = nvme_ctrlr->active_path_id;
    9011           0 :                         assert(path_id == TAILQ_FIRST(&nvme_ctrlr->trids));
    9012           0 :                         nvme_ctrlr_config_json(w, nvme_ctrlr, path_id);
    9013             : 
    9014           0 :                         path_id = TAILQ_NEXT(path_id, link);
    9015           0 :                         while (path_id != NULL) {
    9016           0 :                                 nvme_ctrlr_config_json(w, nvme_ctrlr, path_id);
    9017           0 :                                 path_id = TAILQ_NEXT(path_id, link);
    9018             :                         }
    9019             : 
    9020             : #ifdef SPDK_CONFIG_NVME_CUSE
    9021             :                         nvme_ctrlr_cuse_config_json(w, nvme_ctrlr);
    9022             : #endif
    9023           0 :                 }
    9024           0 :         }
    9025             : 
    9026           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    9027           0 :                 if (!ctx->from_mdns_discovery_service) {
    9028           0 :                         bdev_nvme_discovery_config_json(w, ctx);
    9029           0 :                 }
    9030           0 :         }
    9031             : 
    9032           0 :         bdev_nvme_mdns_discovery_config_json(w);
    9033             : 
    9034             :         /* Dump as last parameter to give all NVMe bdevs chance to be constructed
    9035             :          * before enabling hotplug poller.
    9036             :          */
    9037           0 :         bdev_nvme_hotplug_config_json(w);
    9038             : 
    9039           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9040           0 :         return 0;
    9041             : }
    9042             : 
    9043             : struct spdk_nvme_ctrlr *
    9044           1 : bdev_nvme_get_ctrlr(struct spdk_bdev *bdev)
    9045             : {
    9046             :         struct nvme_bdev *nbdev;
    9047             :         struct nvme_ns *nvme_ns;
    9048             : 
    9049           1 :         if (!bdev || bdev->module != &nvme_if) {
    9050           0 :                 return NULL;
    9051             :         }
    9052             : 
    9053           1 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    9054           1 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    9055           1 :         assert(nvme_ns != NULL);
    9056             : 
    9057           1 :         return nvme_ns->ctrlr->ctrlr;
    9058           1 : }
    9059             : 
    9060             : static bool
    9061          12 : nvme_io_path_is_current(struct nvme_io_path *io_path)
    9062             : {
    9063             :         const struct nvme_bdev_channel *nbdev_ch;
    9064             :         bool current;
    9065             : 
    9066          12 :         if (!nvme_io_path_is_available(io_path)) {
    9067           4 :                 return false;
    9068             :         }
    9069             : 
    9070           8 :         nbdev_ch = io_path->nbdev_ch;
    9071           8 :         if (nbdev_ch == NULL) {
    9072           1 :                 current = false;
    9073           8 :         } else if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    9074           3 :                 struct nvme_io_path *optimized_io_path = NULL;
    9075             : 
    9076           6 :                 STAILQ_FOREACH(optimized_io_path, &nbdev_ch->io_path_list, stailq) {
    9077           5 :                         if (optimized_io_path->nvme_ns->ana_state == SPDK_NVME_ANA_OPTIMIZED_STATE) {
    9078           2 :                                 break;
    9079             :                         }
    9080           3 :                 }
    9081             : 
    9082             :                 /* A non-optimized path is only current if there are no optimized paths. */
    9083           3 :                 current = (io_path->nvme_ns->ana_state == SPDK_NVME_ANA_OPTIMIZED_STATE) ||
    9084           2 :                           (optimized_io_path == NULL);
    9085           3 :         } else {
    9086           4 :                 if (nbdev_ch->current_io_path) {
    9087           1 :                         current = (io_path == nbdev_ch->current_io_path);
    9088           1 :                 } else {
    9089             :                         struct nvme_io_path *first_path;
    9090             : 
    9091             :                         /* We arrived here as there are no optimized paths for active-passive
    9092             :                          * mode. Check if this io_path is the first one available on the list.
    9093             :                          */
    9094           3 :                         current = false;
    9095           3 :                         STAILQ_FOREACH(first_path, &nbdev_ch->io_path_list, stailq) {
    9096           3 :                                 if (nvme_io_path_is_available(first_path)) {
    9097           3 :                                         current = (io_path == first_path);
    9098           3 :                                         break;
    9099             :                                 }
    9100           0 :                         }
    9101             :                 }
    9102             :         }
    9103             : 
    9104           8 :         return current;
    9105          12 : }
    9106             : 
    9107             : static struct nvme_ctrlr *
    9108           0 : bdev_nvme_next_ctrlr_unsafe(struct nvme_bdev_ctrlr *nbdev_ctrlr, struct nvme_ctrlr *prev)
    9109             : {
    9110             :         struct nvme_ctrlr *next;
    9111             : 
    9112             :         /* Must be called under g_bdev_nvme_mutex */
    9113           0 :         next = prev != NULL ? TAILQ_NEXT(prev, tailq) : TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
    9114           0 :         while (next != NULL) {
    9115             :                 /* ref can be 0 when the ctrlr was released, but hasn't been detached yet */
    9116           0 :                 pthread_mutex_lock(&next->mutex);
    9117           0 :                 if (next->ref > 0) {
    9118           0 :                         next->ref++;
    9119           0 :                         pthread_mutex_unlock(&next->mutex);
    9120           0 :                         return next;
    9121             :                 }
    9122             : 
    9123           0 :                 pthread_mutex_unlock(&next->mutex);
    9124           0 :                 next = TAILQ_NEXT(next, tailq);
    9125             :         }
    9126             : 
    9127           0 :         return NULL;
    9128           0 : }
    9129             : 
    9130             : struct bdev_nvme_set_keys_ctx {
    9131             :         struct nvme_ctrlr       *nctrlr;
    9132             :         struct spdk_key         *dhchap_key;
    9133             :         struct spdk_key         *dhchap_ctrlr_key;
    9134             :         struct spdk_thread      *thread;
    9135             :         bdev_nvme_set_keys_cb   cb_fn;
    9136             :         void                    *cb_ctx;
    9137             :         int                     status;
    9138             : };
    9139             : 
    9140             : static void
    9141           0 : bdev_nvme_free_set_keys_ctx(struct bdev_nvme_set_keys_ctx *ctx)
    9142             : {
    9143           0 :         if (ctx == NULL) {
    9144           0 :                 return;
    9145             :         }
    9146             : 
    9147           0 :         spdk_keyring_put_key(ctx->dhchap_key);
    9148           0 :         spdk_keyring_put_key(ctx->dhchap_ctrlr_key);
    9149           0 :         free(ctx);
    9150           0 : }
    9151             : 
    9152             : static void
    9153           0 : _bdev_nvme_set_keys_done(void *_ctx)
    9154             : {
    9155           0 :         struct bdev_nvme_set_keys_ctx *ctx = _ctx;
    9156             : 
    9157           0 :         ctx->cb_fn(ctx->cb_ctx, ctx->status);
    9158             : 
    9159           0 :         if (ctx->nctrlr != NULL) {
    9160           0 :                 nvme_ctrlr_put_ref(ctx->nctrlr);
    9161           0 :         }
    9162           0 :         bdev_nvme_free_set_keys_ctx(ctx);
    9163           0 : }
    9164             : 
    9165             : static void
    9166           0 : bdev_nvme_set_keys_done(struct bdev_nvme_set_keys_ctx *ctx, int status)
    9167             : {
    9168           0 :         ctx->status = status;
    9169           0 :         spdk_thread_exec_msg(ctx->thread, _bdev_nvme_set_keys_done, ctx);
    9170           0 : }
    9171             : 
    9172             : static void bdev_nvme_authenticate_ctrlr(struct bdev_nvme_set_keys_ctx *ctx);
    9173             : 
    9174             : static void
    9175           0 : bdev_nvme_authenticate_ctrlr_continue(struct bdev_nvme_set_keys_ctx *ctx)
    9176             : {
    9177             :         struct nvme_ctrlr *next;
    9178             : 
    9179           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    9180           0 :         next = bdev_nvme_next_ctrlr_unsafe(NULL, ctx->nctrlr);
    9181           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9182             : 
    9183           0 :         nvme_ctrlr_put_ref(ctx->nctrlr);
    9184           0 :         ctx->nctrlr = next;
    9185             : 
    9186           0 :         if (next == NULL) {
    9187           0 :                 bdev_nvme_set_keys_done(ctx, 0);
    9188           0 :         } else {
    9189           0 :                 bdev_nvme_authenticate_ctrlr(ctx);
    9190             :         }
    9191           0 : }
    9192             : 
    9193             : static void
    9194           0 : bdev_nvme_authenticate_qpairs_done(struct spdk_io_channel_iter *i, int status)
    9195             : {
    9196           0 :         struct bdev_nvme_set_keys_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    9197             : 
    9198           0 :         if (status != 0) {
    9199           0 :                 bdev_nvme_set_keys_done(ctx, status);
    9200           0 :                 return;
    9201             :         }
    9202           0 :         bdev_nvme_authenticate_ctrlr_continue(ctx);
    9203           0 : }
    9204             : 
    9205             : static void
    9206           0 : bdev_nvme_authenticate_qpair_done(void *ctx, int status)
    9207             : {
    9208           0 :         spdk_for_each_channel_continue(ctx, status);
    9209           0 : }
    9210             : 
    9211             : static void
    9212           0 : bdev_nvme_authenticate_qpair(struct spdk_io_channel_iter *i)
    9213             : {
    9214           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
    9215           0 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(ch);
    9216           0 :         struct nvme_qpair *qpair = ctrlr_ch->qpair;
    9217             :         int rc;
    9218             : 
    9219           0 :         if (!nvme_qpair_is_connected(qpair)) {
    9220           0 :                 spdk_for_each_channel_continue(i, 0);
    9221           0 :                 return;
    9222             :         }
    9223             : 
    9224           0 :         rc = spdk_nvme_qpair_authenticate(qpair->qpair, bdev_nvme_authenticate_qpair_done, i);
    9225           0 :         if (rc != 0) {
    9226           0 :                 spdk_for_each_channel_continue(i, rc);
    9227           0 :         }
    9228           0 : }
    9229             : 
    9230             : static void
    9231           0 : bdev_nvme_authenticate_ctrlr_done(void *_ctx, int status)
    9232             : {
    9233           0 :         struct bdev_nvme_set_keys_ctx *ctx = _ctx;
    9234             : 
    9235           0 :         if (status != 0) {
    9236           0 :                 bdev_nvme_set_keys_done(ctx, status);
    9237           0 :                 return;
    9238             :         }
    9239             : 
    9240           0 :         spdk_for_each_channel(ctx->nctrlr, bdev_nvme_authenticate_qpair, ctx,
    9241             :                               bdev_nvme_authenticate_qpairs_done);
    9242           0 : }
    9243             : 
    9244             : static void
    9245           0 : bdev_nvme_authenticate_ctrlr(struct bdev_nvme_set_keys_ctx *ctx)
    9246             : {
    9247           0 :         struct spdk_nvme_ctrlr_key_opts opts = {};
    9248           0 :         struct nvme_ctrlr *nctrlr = ctx->nctrlr;
    9249             :         int rc;
    9250             : 
    9251           0 :         opts.size = SPDK_SIZEOF(&opts, dhchap_ctrlr_key);
    9252           0 :         opts.dhchap_key = ctx->dhchap_key;
    9253           0 :         opts.dhchap_ctrlr_key = ctx->dhchap_ctrlr_key;
    9254           0 :         rc = spdk_nvme_ctrlr_set_keys(nctrlr->ctrlr, &opts);
    9255           0 :         if (rc != 0) {
    9256           0 :                 bdev_nvme_set_keys_done(ctx, rc);
    9257           0 :                 return;
    9258             :         }
    9259             : 
    9260           0 :         if (ctx->dhchap_key != NULL) {
    9261           0 :                 rc = spdk_nvme_ctrlr_authenticate(nctrlr->ctrlr,
    9262           0 :                                                   bdev_nvme_authenticate_ctrlr_done, ctx);
    9263           0 :                 if (rc != 0) {
    9264           0 :                         bdev_nvme_set_keys_done(ctx, rc);
    9265           0 :                 }
    9266           0 :         } else {
    9267           0 :                 bdev_nvme_authenticate_ctrlr_continue(ctx);
    9268             :         }
    9269           0 : }
    9270             : 
    9271             : int
    9272           0 : bdev_nvme_set_keys(const char *name, const char *dhchap_key, const char *dhchap_ctrlr_key,
    9273             :                    bdev_nvme_set_keys_cb cb_fn, void *cb_ctx)
    9274             : {
    9275             :         struct bdev_nvme_set_keys_ctx *ctx;
    9276             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    9277             :         struct nvme_ctrlr *nctrlr;
    9278             : 
    9279           0 :         ctx = calloc(1, sizeof(*ctx));
    9280           0 :         if (ctx == NULL) {
    9281           0 :                 return -ENOMEM;
    9282             :         }
    9283             : 
    9284           0 :         if (dhchap_key != NULL) {
    9285           0 :                 ctx->dhchap_key = spdk_keyring_get_key(dhchap_key);
    9286           0 :                 if (ctx->dhchap_key == NULL) {
    9287           0 :                         SPDK_ERRLOG("Could not find key %s for bdev %s\n", dhchap_key, name);
    9288           0 :                         bdev_nvme_free_set_keys_ctx(ctx);
    9289           0 :                         return -ENOKEY;
    9290             :                 }
    9291           0 :         }
    9292           0 :         if (dhchap_ctrlr_key != NULL) {
    9293           0 :                 ctx->dhchap_ctrlr_key = spdk_keyring_get_key(dhchap_ctrlr_key);
    9294           0 :                 if (ctx->dhchap_ctrlr_key == NULL) {
    9295           0 :                         SPDK_ERRLOG("Could not find key %s for bdev %s\n", dhchap_ctrlr_key, name);
    9296           0 :                         bdev_nvme_free_set_keys_ctx(ctx);
    9297           0 :                         return -ENOKEY;
    9298             :                 }
    9299           0 :         }
    9300             : 
    9301           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    9302           0 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    9303           0 :         if (nbdev_ctrlr == NULL) {
    9304           0 :                 SPDK_ERRLOG("Could not find bdev_ctrlr %s\n", name);
    9305           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9306           0 :                 bdev_nvme_free_set_keys_ctx(ctx);
    9307           0 :                 return -ENODEV;
    9308             :         }
    9309           0 :         nctrlr = bdev_nvme_next_ctrlr_unsafe(nbdev_ctrlr, NULL);
    9310           0 :         if (nctrlr == NULL) {
    9311           0 :                 SPDK_ERRLOG("Could not find any nvme_ctrlrs on bdev_ctrlr %s\n", name);
    9312           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9313           0 :                 bdev_nvme_free_set_keys_ctx(ctx);
    9314           0 :                 return -ENODEV;
    9315             :         }
    9316           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9317             : 
    9318           0 :         ctx->nctrlr = nctrlr;
    9319           0 :         ctx->cb_fn = cb_fn;
    9320           0 :         ctx->cb_ctx = cb_ctx;
    9321           0 :         ctx->thread = spdk_get_thread();
    9322             : 
    9323           0 :         bdev_nvme_authenticate_ctrlr(ctx);
    9324             : 
    9325           0 :         return 0;
    9326           0 : }
    9327             : 
    9328             : void
    9329           0 : nvme_io_path_info_json(struct spdk_json_write_ctx *w, struct nvme_io_path *io_path)
    9330             : {
    9331           0 :         struct nvme_ns *nvme_ns = io_path->nvme_ns;
    9332           0 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    9333             :         const struct spdk_nvme_ctrlr_data *cdata;
    9334             :         const struct spdk_nvme_transport_id *trid;
    9335             :         const char *adrfam_str;
    9336             : 
    9337           0 :         spdk_json_write_object_begin(w);
    9338             : 
    9339           0 :         spdk_json_write_named_string(w, "bdev_name", nvme_ns->bdev->disk.name);
    9340             : 
    9341           0 :         cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    9342           0 :         trid = spdk_nvme_ctrlr_get_transport_id(nvme_ctrlr->ctrlr);
    9343             : 
    9344           0 :         spdk_json_write_named_uint32(w, "cntlid", cdata->cntlid);
    9345           0 :         spdk_json_write_named_bool(w, "current", nvme_io_path_is_current(io_path));
    9346           0 :         spdk_json_write_named_bool(w, "connected", nvme_qpair_is_connected(io_path->qpair));
    9347           0 :         spdk_json_write_named_bool(w, "accessible", nvme_ns_is_accessible(nvme_ns));
    9348             : 
    9349           0 :         spdk_json_write_named_object_begin(w, "transport");
    9350           0 :         spdk_json_write_named_string(w, "trtype", trid->trstring);
    9351           0 :         spdk_json_write_named_string(w, "traddr", trid->traddr);
    9352           0 :         if (trid->trsvcid[0] != '\0') {
    9353           0 :                 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid);
    9354           0 :         }
    9355           0 :         adrfam_str = spdk_nvme_transport_id_adrfam_str(trid->adrfam);
    9356           0 :         if (adrfam_str) {
    9357           0 :                 spdk_json_write_named_string(w, "adrfam", adrfam_str);
    9358           0 :         }
    9359           0 :         spdk_json_write_object_end(w);
    9360             : 
    9361           0 :         spdk_json_write_object_end(w);
    9362           0 : }
    9363             : 
    9364             : void
    9365           0 : bdev_nvme_get_discovery_info(struct spdk_json_write_ctx *w)
    9366             : {
    9367             :         struct discovery_ctx *ctx;
    9368             :         struct discovery_entry_ctx *entry_ctx;
    9369             : 
    9370           0 :         spdk_json_write_array_begin(w);
    9371           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    9372           0 :                 spdk_json_write_object_begin(w);
    9373           0 :                 spdk_json_write_named_string(w, "name", ctx->name);
    9374             : 
    9375           0 :                 spdk_json_write_named_object_begin(w, "trid");
    9376           0 :                 nvme_bdev_dump_trid_json(&ctx->trid, w);
    9377           0 :                 spdk_json_write_object_end(w);
    9378             : 
    9379           0 :                 spdk_json_write_named_array_begin(w, "referrals");
    9380           0 :                 TAILQ_FOREACH(entry_ctx, &ctx->discovery_entry_ctxs, tailq) {
    9381           0 :                         spdk_json_write_object_begin(w);
    9382           0 :                         spdk_json_write_named_object_begin(w, "trid");
    9383           0 :                         nvme_bdev_dump_trid_json(&entry_ctx->trid, w);
    9384           0 :                         spdk_json_write_object_end(w);
    9385           0 :                         spdk_json_write_object_end(w);
    9386           0 :                 }
    9387           0 :                 spdk_json_write_array_end(w);
    9388             : 
    9389           0 :                 spdk_json_write_object_end(w);
    9390           0 :         }
    9391           0 :         spdk_json_write_array_end(w);
    9392           0 : }
    9393             : 
    9394           1 : SPDK_LOG_REGISTER_COMPONENT(bdev_nvme)
    9395             : 
    9396             : static void
    9397           0 : bdev_nvme_trace(void)
    9398             : {
    9399           0 :         struct spdk_trace_tpoint_opts opts[] = {
    9400             :                 {
    9401             :                         "BDEV_NVME_IO_START", TRACE_BDEV_NVME_IO_START,
    9402             :                         OWNER_TYPE_NONE, OBJECT_BDEV_NVME_IO, 1,
    9403             :                         {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
    9404             :                 },
    9405             :                 {
    9406             :                         "BDEV_NVME_IO_DONE", TRACE_BDEV_NVME_IO_DONE,
    9407             :                         OWNER_TYPE_NONE, OBJECT_BDEV_NVME_IO, 0,
    9408             :                         {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
    9409             :                 }
    9410             :         };
    9411             : 
    9412             : 
    9413           0 :         spdk_trace_register_object(OBJECT_BDEV_NVME_IO, 'N');
    9414           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
    9415           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_PCIE_SUBMIT, OBJECT_BDEV_NVME_IO, 0);
    9416           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_TCP_SUBMIT, OBJECT_BDEV_NVME_IO, 0);
    9417           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_PCIE_COMPLETE, OBJECT_BDEV_NVME_IO, 0);
    9418           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_TCP_COMPLETE, OBJECT_BDEV_NVME_IO, 0);
    9419           0 : }
    9420           1 : SPDK_TRACE_REGISTER_FN(bdev_nvme_trace, "bdev_nvme", TRACE_GROUP_BDEV_NVME)

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