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: 2664 5005 53.2 %
Date: 2024-11-20 05:34:43 Functions: 225 326 69.0 %

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

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