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: 2671 5011 53.3 %
Date: 2024-11-05 09:32:08 Functions: 226 327 69.1 %

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

Generated by: LCOV version 1.15