1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2016 Intel Corporation. All rights reserved. 3 * Copyright (c) 2018-2019, 2021 Mellanox Technologies LTD. All rights reserved. 4 * Copyright (c) 2021, 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved. 5 */ 6 7 #include "spdk/stdinc.h" 8 9 #include "spdk/bdev.h" 10 #include "spdk/bit_array.h" 11 #include "spdk/thread.h" 12 #include "spdk/nvmf.h" 13 #include "spdk/endian.h" 14 #include "spdk/string.h" 15 #include "spdk/log.h" 16 #include "spdk_internal/usdt.h" 17 18 #include "nvmf_internal.h" 19 #include "transport.h" 20 21 SPDK_LOG_REGISTER_COMPONENT(nvmf) 22 23 #define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024 24 25 static TAILQ_HEAD(, spdk_nvmf_tgt) g_nvmf_tgts = TAILQ_HEAD_INITIALIZER(g_nvmf_tgts); 26 27 typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status); 28 29 /* supplied to a single call to nvmf_qpair_disconnect */ 30 struct nvmf_qpair_disconnect_ctx { 31 struct spdk_nvmf_qpair *qpair; 32 struct spdk_nvmf_ctrlr *ctrlr; 33 nvmf_qpair_disconnect_cb cb_fn; 34 struct spdk_thread *thread; 35 void *ctx; 36 uint16_t qid; 37 }; 38 39 /* 40 * There are several times when we need to iterate through the list of all qpairs and selectively delete them. 41 * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from 42 * to enable calling nvmf_qpair_disconnect on the next desired qpair. 43 */ 44 struct nvmf_qpair_disconnect_many_ctx { 45 struct spdk_nvmf_subsystem *subsystem; 46 struct spdk_nvmf_poll_group *group; 47 spdk_nvmf_poll_group_mod_done cpl_fn; 48 void *cpl_ctx; 49 }; 50 51 static void 52 nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair, 53 enum spdk_nvmf_qpair_state state) 54 { 55 assert(qpair != NULL); 56 assert(qpair->group->thread == spdk_get_thread()); 57 58 qpair->state = state; 59 } 60 61 static int 62 nvmf_poll_group_poll(void *ctx) 63 { 64 struct spdk_nvmf_poll_group *group = ctx; 65 int rc; 66 int count = 0; 67 struct spdk_nvmf_transport_poll_group *tgroup; 68 69 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 70 rc = nvmf_transport_poll_group_poll(tgroup); 71 if (rc < 0) { 72 return SPDK_POLLER_BUSY; 73 } 74 count += rc; 75 } 76 77 return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE; 78 } 79 80 /* 81 * Reset and clean up the poll group (I/O channel code will actually free the 82 * group). 83 */ 84 static void 85 nvmf_tgt_cleanup_poll_group(struct spdk_nvmf_poll_group *group) 86 { 87 struct spdk_nvmf_transport_poll_group *tgroup, *tmp; 88 struct spdk_nvmf_subsystem_poll_group *sgroup; 89 uint32_t sid, nsid; 90 91 TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { 92 TAILQ_REMOVE(&group->tgroups, tgroup, link); 93 nvmf_transport_poll_group_destroy(tgroup); 94 } 95 96 for (sid = 0; sid < group->num_sgroups; sid++) { 97 sgroup = &group->sgroups[sid]; 98 99 assert(sgroup != NULL); 100 101 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 102 if (sgroup->ns_info[nsid].channel) { 103 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 104 sgroup->ns_info[nsid].channel = NULL; 105 } 106 } 107 108 free(sgroup->ns_info); 109 } 110 111 free(group->sgroups); 112 113 spdk_poller_unregister(&group->poller); 114 115 if (group->destroy_cb_fn) { 116 group->destroy_cb_fn(group->destroy_cb_arg, 0); 117 } 118 } 119 120 /* 121 * Callback to unregister a poll group from the target, and clean up its state. 122 */ 123 static void 124 nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf) 125 { 126 struct spdk_nvmf_tgt *tgt = io_device; 127 struct spdk_nvmf_poll_group *group = ctx_buf; 128 129 SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group, spdk_thread_get_id(group->thread)); 130 131 pthread_mutex_lock(&tgt->mutex); 132 TAILQ_REMOVE(&tgt->poll_groups, group, link); 133 tgt->num_poll_groups--; 134 pthread_mutex_unlock(&tgt->mutex); 135 136 assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING)); 137 nvmf_tgt_cleanup_poll_group(group); 138 } 139 140 static int 141 nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group, 142 struct spdk_nvmf_transport *transport) 143 { 144 struct spdk_nvmf_transport_poll_group *tgroup; 145 146 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 147 if (tgroup->transport == transport) { 148 /* Transport already in the poll group */ 149 return 0; 150 } 151 } 152 153 tgroup = nvmf_transport_poll_group_create(transport, group); 154 if (!tgroup) { 155 SPDK_ERRLOG("Unable to create poll group for transport\n"); 156 return -1; 157 } 158 SPDK_DTRACE_PROBE2_TICKS(nvmf_transport_poll_group_create, transport, 159 spdk_thread_get_id(group->thread)); 160 161 tgroup->group = group; 162 TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); 163 164 return 0; 165 } 166 167 static int 168 nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf) 169 { 170 struct spdk_nvmf_tgt *tgt = io_device; 171 struct spdk_nvmf_poll_group *group = ctx_buf; 172 struct spdk_nvmf_transport *transport; 173 struct spdk_nvmf_subsystem *subsystem; 174 struct spdk_thread *thread = spdk_get_thread(); 175 int rc; 176 177 group->tgt = tgt; 178 TAILQ_INIT(&group->tgroups); 179 TAILQ_INIT(&group->qpairs); 180 group->thread = thread; 181 pthread_mutex_init(&group->mutex, NULL); 182 183 group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0); 184 185 SPDK_DTRACE_PROBE1_TICKS(nvmf_create_poll_group, spdk_thread_get_id(thread)); 186 187 TAILQ_FOREACH(transport, &tgt->transports, link) { 188 rc = nvmf_poll_group_add_transport(group, transport); 189 if (rc != 0) { 190 nvmf_tgt_cleanup_poll_group(group); 191 return rc; 192 } 193 } 194 195 group->num_sgroups = tgt->max_subsystems; 196 group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group)); 197 if (!group->sgroups) { 198 nvmf_tgt_cleanup_poll_group(group); 199 return -ENOMEM; 200 } 201 202 for (subsystem = spdk_nvmf_subsystem_get_first(tgt); 203 subsystem != NULL; 204 subsystem = spdk_nvmf_subsystem_get_next(subsystem)) { 205 if (nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) { 206 nvmf_tgt_cleanup_poll_group(group); 207 return -1; 208 } 209 } 210 211 pthread_mutex_lock(&tgt->mutex); 212 tgt->num_poll_groups++; 213 TAILQ_INSERT_TAIL(&tgt->poll_groups, group, link); 214 pthread_mutex_unlock(&tgt->mutex); 215 216 return 0; 217 } 218 219 static void 220 _nvmf_tgt_disconnect_qpairs(void *ctx) 221 { 222 struct spdk_nvmf_qpair *qpair, *qpair_tmp; 223 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 224 struct spdk_nvmf_poll_group *group = qpair_ctx->group; 225 struct spdk_io_channel *ch; 226 int rc; 227 228 TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) { 229 rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 230 if (rc && rc != -EINPROGRESS) { 231 break; 232 } 233 } 234 235 if (TAILQ_EMPTY(&group->qpairs)) { 236 /* When the refcount from the channels reaches 0, nvmf_tgt_destroy_poll_group will be called. */ 237 ch = spdk_io_channel_from_ctx(group); 238 spdk_put_io_channel(ch); 239 free(qpair_ctx); 240 return; 241 } 242 243 /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */ 244 spdk_thread_send_msg(spdk_get_thread(), _nvmf_tgt_disconnect_qpairs, ctx); 245 } 246 247 static void 248 nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group) 249 { 250 struct nvmf_qpair_disconnect_many_ctx *ctx; 251 252 SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group_qpairs, spdk_thread_get_id(group->thread)); 253 254 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 255 if (!ctx) { 256 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n"); 257 return; 258 } 259 260 ctx->group = group; 261 _nvmf_tgt_disconnect_qpairs(ctx); 262 } 263 264 struct spdk_nvmf_tgt * 265 spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *opts) 266 { 267 struct spdk_nvmf_tgt *tgt, *tmp_tgt; 268 269 if (strnlen(opts->name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) { 270 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH); 271 return NULL; 272 } 273 274 TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) { 275 if (!strncmp(opts->name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) { 276 SPDK_ERRLOG("Provided target name must be unique.\n"); 277 return NULL; 278 } 279 } 280 281 tgt = calloc(1, sizeof(*tgt)); 282 if (!tgt) { 283 return NULL; 284 } 285 286 snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts->name); 287 288 if (!opts || !opts->max_subsystems) { 289 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS; 290 } else { 291 tgt->max_subsystems = opts->max_subsystems; 292 } 293 294 if (!opts) { 295 tgt->crdt[0] = 0; 296 tgt->crdt[1] = 0; 297 tgt->crdt[2] = 0; 298 } else { 299 tgt->crdt[0] = opts->crdt[0]; 300 tgt->crdt[1] = opts->crdt[1]; 301 tgt->crdt[2] = opts->crdt[2]; 302 } 303 304 if (!opts) { 305 tgt->discovery_filter = SPDK_NVMF_TGT_DISCOVERY_MATCH_ANY; 306 } else { 307 tgt->discovery_filter = opts->discovery_filter; 308 } 309 310 tgt->discovery_genctr = 0; 311 TAILQ_INIT(&tgt->transports); 312 TAILQ_INIT(&tgt->poll_groups); 313 tgt->num_poll_groups = 0; 314 315 tgt->subsystem_ids = spdk_bit_array_create(tgt->max_subsystems); 316 if (tgt->subsystem_ids == NULL) { 317 free(tgt); 318 return NULL; 319 } 320 321 RB_INIT(&tgt->subsystems); 322 323 pthread_mutex_init(&tgt->mutex, NULL); 324 325 spdk_io_device_register(tgt, 326 nvmf_tgt_create_poll_group, 327 nvmf_tgt_destroy_poll_group, 328 sizeof(struct spdk_nvmf_poll_group), 329 tgt->name); 330 331 tgt->state = NVMF_TGT_RUNNING; 332 333 TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link); 334 335 return tgt; 336 } 337 338 static void 339 _nvmf_tgt_destroy_next_transport(void *ctx) 340 { 341 struct spdk_nvmf_tgt *tgt = ctx; 342 struct spdk_nvmf_transport *transport; 343 344 if (!TAILQ_EMPTY(&tgt->transports)) { 345 transport = TAILQ_FIRST(&tgt->transports); 346 TAILQ_REMOVE(&tgt->transports, transport, link); 347 spdk_nvmf_transport_destroy(transport, _nvmf_tgt_destroy_next_transport, tgt); 348 } else { 349 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn = tgt->destroy_cb_fn; 350 void *destroy_cb_arg = tgt->destroy_cb_arg; 351 352 pthread_mutex_destroy(&tgt->mutex); 353 free(tgt); 354 355 if (destroy_cb_fn) { 356 destroy_cb_fn(destroy_cb_arg, 0); 357 } 358 } 359 } 360 361 static void 362 nvmf_tgt_destroy_cb(void *io_device) 363 { 364 struct spdk_nvmf_tgt *tgt = io_device; 365 struct spdk_nvmf_subsystem *subsystem, *subsystem_next; 366 int rc; 367 368 /* We will be freeing subsystems in this loop, so we always need to get the next one 369 * ahead of time, since we can't call get_next() on a subsystem that's been freed. 370 */ 371 for (subsystem = spdk_nvmf_subsystem_get_first(tgt), 372 subsystem_next = spdk_nvmf_subsystem_get_next(subsystem); 373 subsystem != NULL; 374 subsystem = subsystem_next, 375 subsystem_next = spdk_nvmf_subsystem_get_next(subsystem_next)) { 376 nvmf_subsystem_remove_all_listeners(subsystem, true); 377 378 rc = spdk_nvmf_subsystem_destroy(subsystem, nvmf_tgt_destroy_cb, tgt); 379 if (rc) { 380 if (rc == -EINPROGRESS) { 381 /* If rc is -EINPROGRESS, nvmf_tgt_destroy_cb will be called again when subsystem #i 382 * is destroyed, nvmf_tgt_destroy_cb will continue to destroy other subsystems if any */ 383 return; 384 } else { 385 SPDK_ERRLOG("Failed to destroy subsystem %s, rc %d\n", subsystem->subnqn, rc); 386 } 387 } 388 } 389 spdk_bit_array_free(&tgt->subsystem_ids); 390 _nvmf_tgt_destroy_next_transport(tgt); 391 } 392 393 void 394 spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt, 395 spdk_nvmf_tgt_destroy_done_fn cb_fn, 396 void *cb_arg) 397 { 398 assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING)); 399 400 tgt->destroy_cb_fn = cb_fn; 401 tgt->destroy_cb_arg = cb_arg; 402 403 TAILQ_REMOVE(&g_nvmf_tgts, tgt, link); 404 405 spdk_io_device_unregister(tgt, nvmf_tgt_destroy_cb); 406 } 407 408 const char * 409 spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt) 410 { 411 return tgt->name; 412 } 413 414 struct spdk_nvmf_tgt * 415 spdk_nvmf_get_tgt(const char *name) 416 { 417 struct spdk_nvmf_tgt *tgt; 418 uint32_t num_targets = 0; 419 420 TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) { 421 if (name) { 422 if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) { 423 return tgt; 424 } 425 } 426 num_targets++; 427 } 428 429 /* 430 * special case. If there is only one target and 431 * no name was specified, return the only available 432 * target. If there is more than one target, name must 433 * be specified. 434 */ 435 if (!name && num_targets == 1) { 436 return TAILQ_FIRST(&g_nvmf_tgts); 437 } 438 439 return NULL; 440 } 441 442 struct spdk_nvmf_tgt * 443 spdk_nvmf_get_first_tgt(void) 444 { 445 return TAILQ_FIRST(&g_nvmf_tgts); 446 } 447 448 struct spdk_nvmf_tgt * 449 spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev) 450 { 451 return TAILQ_NEXT(prev, link); 452 } 453 454 static void 455 nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w, 456 struct spdk_nvmf_subsystem *subsystem) 457 { 458 struct spdk_nvmf_host *host; 459 struct spdk_nvmf_subsystem_listener *listener; 460 const struct spdk_nvme_transport_id *trid; 461 struct spdk_nvmf_ns *ns; 462 struct spdk_nvmf_ns_opts ns_opts; 463 uint32_t max_namespaces; 464 char uuid_str[SPDK_UUID_STRING_LEN]; 465 466 if (spdk_nvmf_subsystem_get_type(subsystem) != SPDK_NVMF_SUBTYPE_NVME) { 467 return; 468 } 469 470 /* { */ 471 spdk_json_write_object_begin(w); 472 spdk_json_write_named_string(w, "method", "nvmf_create_subsystem"); 473 474 /* "params" : { */ 475 spdk_json_write_named_object_begin(w, "params"); 476 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 477 spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem)); 478 spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem)); 479 spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem)); 480 481 max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem); 482 if (max_namespaces != 0) { 483 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces); 484 } 485 486 spdk_json_write_named_uint32(w, "min_cntlid", spdk_nvmf_subsystem_get_min_cntlid(subsystem)); 487 spdk_json_write_named_uint32(w, "max_cntlid", spdk_nvmf_subsystem_get_max_cntlid(subsystem)); 488 spdk_json_write_named_bool(w, "ana_reporting", nvmf_subsystem_get_ana_reporting(subsystem)); 489 490 /* } "params" */ 491 spdk_json_write_object_end(w); 492 493 /* } */ 494 spdk_json_write_object_end(w); 495 496 for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL; 497 host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) { 498 499 spdk_json_write_object_begin(w); 500 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host"); 501 502 /* "params" : { */ 503 spdk_json_write_named_object_begin(w, "params"); 504 505 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 506 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host)); 507 508 /* } "params" */ 509 spdk_json_write_object_end(w); 510 511 /* } */ 512 spdk_json_write_object_end(w); 513 } 514 515 for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL; 516 ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) { 517 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts)); 518 519 spdk_json_write_object_begin(w); 520 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns"); 521 522 /* "params" : { */ 523 spdk_json_write_named_object_begin(w, "params"); 524 525 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 526 527 /* "namespace" : { */ 528 spdk_json_write_named_object_begin(w, "namespace"); 529 530 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns)); 531 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns))); 532 533 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) { 534 SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch"); 535 spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]), 536 from_be64(&ns_opts.nguid[8])); 537 } 538 539 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) { 540 SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch"); 541 spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64)); 542 } 543 544 if (!spdk_uuid_is_null(&ns_opts.uuid)) { 545 spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &ns_opts.uuid); 546 spdk_json_write_named_string(w, "uuid", uuid_str); 547 } 548 549 if (nvmf_subsystem_get_ana_reporting(subsystem)) { 550 spdk_json_write_named_uint32(w, "anagrpid", ns_opts.anagrpid); 551 } 552 553 /* "namespace" */ 554 spdk_json_write_object_end(w); 555 556 /* } "params" */ 557 spdk_json_write_object_end(w); 558 559 /* } */ 560 spdk_json_write_object_end(w); 561 } 562 563 for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL; 564 listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) { 565 trid = spdk_nvmf_subsystem_listener_get_trid(listener); 566 567 spdk_json_write_object_begin(w); 568 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener"); 569 570 /* "params" : { */ 571 spdk_json_write_named_object_begin(w, "params"); 572 573 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 574 nvmf_transport_listen_dump_opts(listener->transport, trid, w); 575 576 /* } "params" */ 577 spdk_json_write_object_end(w); 578 579 /* } */ 580 spdk_json_write_object_end(w); 581 } 582 583 } 584 585 void 586 spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt) 587 { 588 struct spdk_nvmf_subsystem *subsystem; 589 struct spdk_nvmf_transport *transport; 590 591 spdk_json_write_object_begin(w); 592 spdk_json_write_named_string(w, "method", "nvmf_set_max_subsystems"); 593 594 spdk_json_write_named_object_begin(w, "params"); 595 spdk_json_write_named_uint32(w, "max_subsystems", tgt->max_subsystems); 596 spdk_json_write_object_end(w); 597 598 spdk_json_write_object_end(w); 599 600 spdk_json_write_object_begin(w); 601 spdk_json_write_named_string(w, "method", "nvmf_set_crdt"); 602 spdk_json_write_named_object_begin(w, "params"); 603 spdk_json_write_named_uint32(w, "crdt1", tgt->crdt[0]); 604 spdk_json_write_named_uint32(w, "crdt2", tgt->crdt[1]); 605 spdk_json_write_named_uint32(w, "crdt3", tgt->crdt[2]); 606 spdk_json_write_object_end(w); 607 spdk_json_write_object_end(w); 608 609 /* write transports */ 610 TAILQ_FOREACH(transport, &tgt->transports, link) { 611 spdk_json_write_object_begin(w); 612 spdk_json_write_named_string(w, "method", "nvmf_create_transport"); 613 nvmf_transport_dump_opts(transport, w, true); 614 spdk_json_write_object_end(w); 615 } 616 617 subsystem = spdk_nvmf_subsystem_get_first(tgt); 618 while (subsystem) { 619 nvmf_write_subsystem_config_json(w, subsystem); 620 subsystem = spdk_nvmf_subsystem_get_next(subsystem); 621 } 622 } 623 624 static void 625 nvmf_listen_opts_copy(struct spdk_nvmf_listen_opts *opts, 626 const struct spdk_nvmf_listen_opts *opts_src, size_t opts_size) 627 { 628 assert(opts); 629 assert(opts_src); 630 631 opts->opts_size = opts_size; 632 633 #define SET_FIELD(field) \ 634 if (offsetof(struct spdk_nvmf_listen_opts, field) + sizeof(opts->field) <= opts_size) { \ 635 opts->field = opts_src->field; \ 636 } \ 637 638 SET_FIELD(transport_specific); 639 SET_FIELD(secure_channel); 640 #undef SET_FIELD 641 642 /* Do not remove this statement, you should always update this statement when you adding a new field, 643 * and do not forget to add the SET_FIELD statement for your added field. */ 644 SPDK_STATIC_ASSERT(sizeof(struct spdk_nvmf_listen_opts) == 17, "Incorrect size"); 645 } 646 647 void 648 spdk_nvmf_listen_opts_init(struct spdk_nvmf_listen_opts *opts, size_t opts_size) 649 { 650 struct spdk_nvmf_listen_opts opts_local = {}; 651 652 /* local version of opts should have defaults set here */ 653 654 nvmf_listen_opts_copy(opts, &opts_local, opts_size); 655 } 656 657 int 658 spdk_nvmf_tgt_listen_ext(struct spdk_nvmf_tgt *tgt, const struct spdk_nvme_transport_id *trid, 659 struct spdk_nvmf_listen_opts *opts) 660 { 661 struct spdk_nvmf_transport *transport; 662 int rc; 663 struct spdk_nvmf_listen_opts opts_local = {}; 664 665 if (!opts) { 666 SPDK_ERRLOG("opts should not be NULL\n"); 667 return -EINVAL; 668 } 669 670 if (!opts->opts_size) { 671 SPDK_ERRLOG("The opts_size in opts structure should not be zero\n"); 672 return -EINVAL; 673 } 674 675 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 676 if (!transport) { 677 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n", 678 trid->trstring); 679 return -EINVAL; 680 } 681 682 nvmf_listen_opts_copy(&opts_local, opts, opts->opts_size); 683 rc = spdk_nvmf_transport_listen(transport, trid, &opts_local); 684 if (rc < 0) { 685 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr); 686 } 687 688 return rc; 689 } 690 691 int 692 spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt, 693 struct spdk_nvme_transport_id *trid) 694 { 695 struct spdk_nvmf_transport *transport; 696 int rc; 697 698 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 699 if (!transport) { 700 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n", 701 trid->trstring); 702 return -EINVAL; 703 } 704 705 rc = spdk_nvmf_transport_stop_listen(transport, trid); 706 if (rc < 0) { 707 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr); 708 return rc; 709 } 710 return 0; 711 } 712 713 struct spdk_nvmf_tgt_add_transport_ctx { 714 struct spdk_nvmf_tgt *tgt; 715 struct spdk_nvmf_transport *transport; 716 spdk_nvmf_tgt_add_transport_done_fn cb_fn; 717 void *cb_arg; 718 int status; 719 }; 720 721 static void 722 _nvmf_tgt_remove_transport_done(struct spdk_io_channel_iter *i, int status) 723 { 724 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 725 726 ctx->cb_fn(ctx->cb_arg, ctx->status); 727 free(ctx); 728 } 729 730 static void 731 _nvmf_tgt_remove_transport(struct spdk_io_channel_iter *i) 732 { 733 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 734 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 735 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 736 struct spdk_nvmf_transport_poll_group *tgroup, *tmp; 737 738 TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { 739 if (tgroup->transport == ctx->transport) { 740 TAILQ_REMOVE(&group->tgroups, tgroup, link); 741 nvmf_transport_poll_group_destroy(tgroup); 742 } 743 } 744 745 spdk_for_each_channel_continue(i, 0); 746 } 747 748 static void 749 _nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status) 750 { 751 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 752 753 if (status) { 754 ctx->status = status; 755 spdk_for_each_channel(ctx->tgt, 756 _nvmf_tgt_remove_transport, 757 ctx, 758 _nvmf_tgt_remove_transport_done); 759 return; 760 } 761 762 ctx->transport->tgt = ctx->tgt; 763 TAILQ_INSERT_TAIL(&ctx->tgt->transports, ctx->transport, link); 764 ctx->cb_fn(ctx->cb_arg, status); 765 free(ctx); 766 } 767 768 static void 769 _nvmf_tgt_add_transport(struct spdk_io_channel_iter *i) 770 { 771 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 772 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 773 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 774 int rc; 775 776 rc = nvmf_poll_group_add_transport(group, ctx->transport); 777 spdk_for_each_channel_continue(i, rc); 778 } 779 780 void 781 spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt, 782 struct spdk_nvmf_transport *transport, 783 spdk_nvmf_tgt_add_transport_done_fn cb_fn, 784 void *cb_arg) 785 { 786 struct spdk_nvmf_tgt_add_transport_ctx *ctx; 787 788 SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_add_transport, transport, tgt->name); 789 790 if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) { 791 cb_fn(cb_arg, -EEXIST); 792 return; /* transport already created */ 793 } 794 795 ctx = calloc(1, sizeof(*ctx)); 796 if (!ctx) { 797 cb_fn(cb_arg, -ENOMEM); 798 return; 799 } 800 801 ctx->tgt = tgt; 802 ctx->transport = transport; 803 ctx->cb_fn = cb_fn; 804 ctx->cb_arg = cb_arg; 805 806 spdk_for_each_channel(tgt, 807 _nvmf_tgt_add_transport, 808 ctx, 809 _nvmf_tgt_add_transport_done); 810 } 811 812 struct nvmf_tgt_pause_ctx { 813 struct spdk_nvmf_tgt *tgt; 814 spdk_nvmf_tgt_pause_polling_cb_fn cb_fn; 815 void *cb_arg; 816 }; 817 818 static void 819 _nvmf_tgt_pause_polling_done(struct spdk_io_channel_iter *i, int status) 820 { 821 struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 822 823 ctx->tgt->state = NVMF_TGT_PAUSED; 824 825 ctx->cb_fn(ctx->cb_arg, status); 826 free(ctx); 827 } 828 829 static void 830 _nvmf_tgt_pause_polling(struct spdk_io_channel_iter *i) 831 { 832 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 833 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 834 835 spdk_poller_unregister(&group->poller); 836 837 spdk_for_each_channel_continue(i, 0); 838 } 839 840 int 841 spdk_nvmf_tgt_pause_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_pause_polling_cb_fn cb_fn, 842 void *cb_arg) 843 { 844 struct nvmf_tgt_pause_ctx *ctx; 845 846 SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_pause_polling, tgt, tgt->name); 847 848 switch (tgt->state) { 849 case NVMF_TGT_PAUSING: 850 case NVMF_TGT_RESUMING: 851 return -EBUSY; 852 case NVMF_TGT_RUNNING: 853 break; 854 default: 855 return -EINVAL; 856 } 857 858 ctx = calloc(1, sizeof(*ctx)); 859 if (!ctx) { 860 return -ENOMEM; 861 } 862 863 864 tgt->state = NVMF_TGT_PAUSING; 865 866 ctx->tgt = tgt; 867 ctx->cb_fn = cb_fn; 868 ctx->cb_arg = cb_arg; 869 870 spdk_for_each_channel(tgt, 871 _nvmf_tgt_pause_polling, 872 ctx, 873 _nvmf_tgt_pause_polling_done); 874 return 0; 875 } 876 877 static void 878 _nvmf_tgt_resume_polling_done(struct spdk_io_channel_iter *i, int status) 879 { 880 struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 881 882 ctx->tgt->state = NVMF_TGT_RUNNING; 883 884 ctx->cb_fn(ctx->cb_arg, status); 885 free(ctx); 886 } 887 888 static void 889 _nvmf_tgt_resume_polling(struct spdk_io_channel_iter *i) 890 { 891 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 892 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 893 894 assert(group->poller == NULL); 895 group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0); 896 897 spdk_for_each_channel_continue(i, 0); 898 } 899 900 int 901 spdk_nvmf_tgt_resume_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_resume_polling_cb_fn cb_fn, 902 void *cb_arg) 903 { 904 struct nvmf_tgt_pause_ctx *ctx; 905 906 SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_resume_polling, tgt, tgt->name); 907 908 switch (tgt->state) { 909 case NVMF_TGT_PAUSING: 910 case NVMF_TGT_RESUMING: 911 return -EBUSY; 912 case NVMF_TGT_PAUSED: 913 break; 914 default: 915 return -EINVAL; 916 } 917 918 ctx = calloc(1, sizeof(*ctx)); 919 if (!ctx) { 920 return -ENOMEM; 921 } 922 923 tgt->state = NVMF_TGT_RESUMING; 924 925 ctx->tgt = tgt; 926 ctx->cb_fn = cb_fn; 927 ctx->cb_arg = cb_arg; 928 929 spdk_for_each_channel(tgt, 930 _nvmf_tgt_resume_polling, 931 ctx, 932 _nvmf_tgt_resume_polling_done); 933 return 0; 934 } 935 936 struct spdk_nvmf_subsystem * 937 spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn) 938 { 939 struct spdk_nvmf_subsystem subsystem; 940 941 if (!subnqn) { 942 return NULL; 943 } 944 945 /* Ensure that subnqn is null terminated */ 946 if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) { 947 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n"); 948 return NULL; 949 } 950 951 snprintf(subsystem.subnqn, sizeof(subsystem.subnqn), "%s", subnqn); 952 return RB_FIND(subsystem_tree, &tgt->subsystems, &subsystem); 953 } 954 955 struct spdk_nvmf_transport * 956 spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name) 957 { 958 struct spdk_nvmf_transport *transport; 959 960 TAILQ_FOREACH(transport, &tgt->transports, link) { 961 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) { 962 return transport; 963 } 964 } 965 return NULL; 966 } 967 968 struct nvmf_new_qpair_ctx { 969 struct spdk_nvmf_qpair *qpair; 970 struct spdk_nvmf_poll_group *group; 971 }; 972 973 static void 974 _nvmf_poll_group_add(void *_ctx) 975 { 976 struct nvmf_new_qpair_ctx *ctx = _ctx; 977 struct spdk_nvmf_qpair *qpair = ctx->qpair; 978 struct spdk_nvmf_poll_group *group = ctx->group; 979 980 free(_ctx); 981 982 if (spdk_nvmf_poll_group_add(group, qpair) != 0) { 983 SPDK_ERRLOG("Unable to add the qpair to a poll group.\n"); 984 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 985 } 986 } 987 988 void 989 spdk_nvmf_tgt_new_qpair(struct spdk_nvmf_tgt *tgt, struct spdk_nvmf_qpair *qpair) 990 { 991 struct spdk_nvmf_poll_group *group; 992 struct nvmf_new_qpair_ctx *ctx; 993 994 group = spdk_nvmf_get_optimal_poll_group(qpair); 995 if (group == NULL) { 996 if (tgt->next_poll_group == NULL) { 997 tgt->next_poll_group = TAILQ_FIRST(&tgt->poll_groups); 998 if (tgt->next_poll_group == NULL) { 999 SPDK_ERRLOG("No poll groups exist.\n"); 1000 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 1001 return; 1002 } 1003 } 1004 group = tgt->next_poll_group; 1005 tgt->next_poll_group = TAILQ_NEXT(group, link); 1006 } 1007 1008 ctx = calloc(1, sizeof(*ctx)); 1009 if (!ctx) { 1010 SPDK_ERRLOG("Unable to send message to poll group.\n"); 1011 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 1012 return; 1013 } 1014 1015 ctx->qpair = qpair; 1016 ctx->group = group; 1017 1018 pthread_mutex_lock(&group->mutex); 1019 group->current_unassociated_qpairs++; 1020 pthread_mutex_unlock(&group->mutex); 1021 1022 spdk_thread_send_msg(group->thread, _nvmf_poll_group_add, ctx); 1023 } 1024 1025 struct spdk_nvmf_poll_group * 1026 spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt) 1027 { 1028 struct spdk_io_channel *ch; 1029 1030 ch = spdk_get_io_channel(tgt); 1031 if (!ch) { 1032 SPDK_ERRLOG("Unable to get I/O channel for target\n"); 1033 return NULL; 1034 } 1035 1036 return spdk_io_channel_get_ctx(ch); 1037 } 1038 1039 void 1040 spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group, 1041 spdk_nvmf_poll_group_destroy_done_fn cb_fn, 1042 void *cb_arg) 1043 { 1044 assert(group->destroy_cb_fn == NULL); 1045 group->destroy_cb_fn = cb_fn; 1046 group->destroy_cb_arg = cb_arg; 1047 1048 /* This function will put the io_channel associated with this poll group */ 1049 nvmf_tgt_destroy_poll_group_qpairs(group); 1050 } 1051 1052 int 1053 spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group, 1054 struct spdk_nvmf_qpair *qpair) 1055 { 1056 int rc = -1; 1057 struct spdk_nvmf_transport_poll_group *tgroup; 1058 1059 TAILQ_INIT(&qpair->outstanding); 1060 qpair->group = group; 1061 qpair->ctrlr = NULL; 1062 qpair->disconnect_started = false; 1063 1064 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 1065 if (tgroup->transport == qpair->transport) { 1066 rc = nvmf_transport_poll_group_add(tgroup, qpair); 1067 break; 1068 } 1069 } 1070 1071 /* We add the qpair to the group only it is successfully added into the tgroup */ 1072 if (rc == 0) { 1073 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_qpair, qpair, spdk_thread_get_id(group->thread)); 1074 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link); 1075 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVE); 1076 } 1077 1078 return rc; 1079 } 1080 1081 static void 1082 _nvmf_ctrlr_destruct(void *ctx) 1083 { 1084 struct spdk_nvmf_ctrlr *ctrlr = ctx; 1085 1086 nvmf_ctrlr_destruct(ctrlr); 1087 } 1088 1089 static void 1090 _nvmf_ctrlr_free_from_qpair(void *ctx) 1091 { 1092 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 1093 struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr; 1094 uint32_t count; 1095 1096 spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid); 1097 count = spdk_bit_array_count_set(ctrlr->qpair_mask); 1098 if (count == 0) { 1099 assert(!ctrlr->in_destruct); 1100 SPDK_DEBUGLOG(nvmf, "Last qpair %u, destroy ctrlr 0x%hx\n", qpair_ctx->qid, ctrlr->cntlid); 1101 ctrlr->in_destruct = true; 1102 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr); 1103 } 1104 free(qpair_ctx); 1105 } 1106 1107 static void 1108 _nvmf_transport_qpair_fini_complete(void *cb_ctx) 1109 { 1110 struct nvmf_qpair_disconnect_ctx *qpair_ctx = cb_ctx; 1111 struct spdk_nvmf_ctrlr *ctrlr; 1112 /* Store cb args since cb_ctx can be freed in _nvmf_ctrlr_free_from_qpair */ 1113 nvmf_qpair_disconnect_cb cb_fn = qpair_ctx->cb_fn; 1114 void *cb_arg = qpair_ctx->ctx; 1115 struct spdk_thread *cb_thread = qpair_ctx->thread; 1116 1117 ctrlr = qpair_ctx->ctrlr; 1118 SPDK_DEBUGLOG(nvmf, "Finish destroying qid %u\n", qpair_ctx->qid); 1119 1120 if (ctrlr) { 1121 if (qpair_ctx->qid == 0) { 1122 /* Admin qpair is removed, so set the pointer to NULL. 1123 * This operation is safe since we are on ctrlr thread now, admin qpair's thread is the same 1124 * as controller's thread */ 1125 assert(ctrlr->thread == spdk_get_thread()); 1126 ctrlr->admin_qpair = NULL; 1127 } 1128 /* Free qpair id from controller's bit mask and destroy the controller if it is the last qpair */ 1129 if (ctrlr->thread) { 1130 spdk_thread_send_msg(ctrlr->thread, _nvmf_ctrlr_free_from_qpair, qpair_ctx); 1131 } else { 1132 _nvmf_ctrlr_free_from_qpair(qpair_ctx); 1133 } 1134 } else { 1135 free(qpair_ctx); 1136 } 1137 1138 if (cb_fn) { 1139 spdk_thread_send_msg(cb_thread, cb_fn, cb_arg); 1140 } 1141 } 1142 1143 void 1144 spdk_nvmf_poll_group_remove(struct spdk_nvmf_qpair *qpair) 1145 { 1146 struct spdk_nvmf_transport_poll_group *tgroup; 1147 int rc; 1148 1149 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_remove_qpair, qpair, 1150 spdk_thread_get_id(qpair->group->thread)); 1151 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR); 1152 1153 /* Find the tgroup and remove the qpair from the tgroup */ 1154 TAILQ_FOREACH(tgroup, &qpair->group->tgroups, link) { 1155 if (tgroup->transport == qpair->transport) { 1156 rc = nvmf_transport_poll_group_remove(tgroup, qpair); 1157 if (rc && (rc != ENOTSUP)) { 1158 SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n", 1159 qpair, tgroup); 1160 } 1161 break; 1162 } 1163 } 1164 1165 TAILQ_REMOVE(&qpair->group->qpairs, qpair, link); 1166 qpair->group = NULL; 1167 } 1168 1169 static void 1170 _nvmf_qpair_sgroup_req_clean(struct spdk_nvmf_subsystem_poll_group *sgroup, 1171 const struct spdk_nvmf_qpair *qpair) 1172 { 1173 struct spdk_nvmf_request *req, *tmp; 1174 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 1175 if (req->qpair == qpair) { 1176 TAILQ_REMOVE(&sgroup->queued, req, link); 1177 if (nvmf_transport_req_free(req)) { 1178 SPDK_ERRLOG("Transport request free error!\n"); 1179 } 1180 } 1181 } 1182 } 1183 1184 static void 1185 _nvmf_qpair_destroy(void *ctx, int status) 1186 { 1187 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 1188 struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair; 1189 struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr; 1190 struct spdk_nvmf_subsystem_poll_group *sgroup; 1191 uint32_t sid; 1192 1193 assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING); 1194 qpair_ctx->qid = qpair->qid; 1195 1196 if (qpair->connect_received) { 1197 if (0 == qpair->qid) { 1198 assert(qpair->group->stat.current_admin_qpairs > 0); 1199 qpair->group->stat.current_admin_qpairs--; 1200 } else { 1201 assert(qpair->group->stat.current_io_qpairs > 0); 1202 qpair->group->stat.current_io_qpairs--; 1203 } 1204 } else { 1205 pthread_mutex_lock(&qpair->group->mutex); 1206 qpair->group->current_unassociated_qpairs--; 1207 pthread_mutex_unlock(&qpair->group->mutex); 1208 } 1209 1210 if (ctrlr) { 1211 sgroup = &qpair->group->sgroups[ctrlr->subsys->id]; 1212 _nvmf_qpair_sgroup_req_clean(sgroup, qpair); 1213 } else { 1214 for (sid = 0; sid < qpair->group->num_sgroups; sid++) { 1215 sgroup = &qpair->group->sgroups[sid]; 1216 assert(sgroup != NULL); 1217 _nvmf_qpair_sgroup_req_clean(sgroup, qpair); 1218 } 1219 } 1220 1221 qpair_ctx->ctrlr = ctrlr; 1222 spdk_nvmf_poll_group_remove(qpair); 1223 nvmf_transport_qpair_fini(qpair, _nvmf_transport_qpair_fini_complete, qpair_ctx); 1224 } 1225 1226 static void 1227 _nvmf_qpair_disconnect_msg(void *ctx) 1228 { 1229 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 1230 1231 spdk_nvmf_qpair_disconnect(qpair_ctx->qpair, qpair_ctx->cb_fn, qpair_ctx->ctx); 1232 free(ctx); 1233 } 1234 1235 SPDK_LOG_DEPRECATION_REGISTER(spdk_nvmf_qpair_disconnect, "cb_fn and ctx are deprecated", "v23.09", 1236 0); 1237 1238 int 1239 spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair, nvmf_qpair_disconnect_cb cb_fn, void *ctx) 1240 { 1241 struct spdk_nvmf_poll_group *group = qpair->group; 1242 struct nvmf_qpair_disconnect_ctx *qpair_ctx; 1243 1244 if (__atomic_test_and_set(&qpair->disconnect_started, __ATOMIC_RELAXED)) { 1245 return -EINPROGRESS; 1246 } 1247 1248 if (cb_fn || ctx) { 1249 SPDK_LOG_DEPRECATED(spdk_nvmf_qpair_disconnect); 1250 } 1251 1252 /* If we get a qpair in the uninitialized state, we can just destroy it immediately */ 1253 if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) { 1254 nvmf_transport_qpair_fini(qpair, NULL, NULL); 1255 if (cb_fn) { 1256 cb_fn(ctx); 1257 } 1258 return 0; 1259 } 1260 1261 assert(group != NULL); 1262 if (spdk_get_thread() != group->thread) { 1263 /* clear the atomic so we can set it on the next call on the proper thread. */ 1264 __atomic_clear(&qpair->disconnect_started, __ATOMIC_RELAXED); 1265 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 1266 if (!qpair_ctx) { 1267 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 1268 return -ENOMEM; 1269 } 1270 qpair_ctx->qpair = qpair; 1271 qpair_ctx->cb_fn = cb_fn; 1272 qpair_ctx->thread = group->thread; 1273 qpair_ctx->ctx = ctx; 1274 spdk_thread_send_msg(group->thread, _nvmf_qpair_disconnect_msg, qpair_ctx); 1275 return 0; 1276 } 1277 1278 SPDK_DTRACE_PROBE2_TICKS(nvmf_qpair_disconnect, qpair, spdk_thread_get_id(group->thread)); 1279 assert(qpair->state == SPDK_NVMF_QPAIR_ACTIVE); 1280 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING); 1281 1282 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 1283 if (!qpair_ctx) { 1284 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 1285 return -ENOMEM; 1286 } 1287 1288 qpair_ctx->qpair = qpair; 1289 qpair_ctx->cb_fn = cb_fn; 1290 qpair_ctx->thread = group->thread; 1291 qpair_ctx->ctx = ctx; 1292 1293 /* Check for outstanding I/O */ 1294 if (!TAILQ_EMPTY(&qpair->outstanding)) { 1295 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_drain_qpair, qpair, spdk_thread_get_id(group->thread)); 1296 qpair->state_cb = _nvmf_qpair_destroy; 1297 qpair->state_cb_arg = qpair_ctx; 1298 nvmf_qpair_abort_pending_zcopy_reqs(qpair); 1299 nvmf_qpair_free_aer(qpair); 1300 return 0; 1301 } 1302 1303 _nvmf_qpair_destroy(qpair_ctx, 0); 1304 1305 return 0; 1306 } 1307 1308 int 1309 spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair, 1310 struct spdk_nvme_transport_id *trid) 1311 { 1312 memset(trid, 0, sizeof(*trid)); 1313 return nvmf_transport_qpair_get_peer_trid(qpair, trid); 1314 } 1315 1316 int 1317 spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair, 1318 struct spdk_nvme_transport_id *trid) 1319 { 1320 memset(trid, 0, sizeof(*trid)); 1321 return nvmf_transport_qpair_get_local_trid(qpair, trid); 1322 } 1323 1324 int 1325 spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair, 1326 struct spdk_nvme_transport_id *trid) 1327 { 1328 memset(trid, 0, sizeof(*trid)); 1329 return nvmf_transport_qpair_get_listen_trid(qpair, trid); 1330 } 1331 1332 static int 1333 poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1334 struct spdk_nvmf_subsystem *subsystem) 1335 { 1336 struct spdk_nvmf_subsystem_poll_group *sgroup; 1337 uint32_t new_num_ns, old_num_ns; 1338 uint32_t i, j; 1339 struct spdk_nvmf_ns *ns; 1340 struct spdk_nvmf_registrant *reg, *tmp; 1341 struct spdk_io_channel *ch; 1342 struct spdk_nvmf_subsystem_pg_ns_info *ns_info; 1343 struct spdk_nvmf_ctrlr *ctrlr; 1344 bool ns_changed; 1345 1346 /* Make sure our poll group has memory for this subsystem allocated */ 1347 if (subsystem->id >= group->num_sgroups) { 1348 return -ENOMEM; 1349 } 1350 1351 sgroup = &group->sgroups[subsystem->id]; 1352 1353 /* Make sure the array of namespace information is the correct size */ 1354 new_num_ns = subsystem->max_nsid; 1355 old_num_ns = sgroup->num_ns; 1356 1357 ns_changed = false; 1358 1359 if (old_num_ns == 0) { 1360 if (new_num_ns > 0) { 1361 /* First allocation */ 1362 sgroup->ns_info = calloc(new_num_ns, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1363 if (!sgroup->ns_info) { 1364 return -ENOMEM; 1365 } 1366 } 1367 } else if (new_num_ns > old_num_ns) { 1368 void *buf; 1369 1370 /* Make the array larger */ 1371 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1372 if (!buf) { 1373 return -ENOMEM; 1374 } 1375 1376 sgroup->ns_info = buf; 1377 1378 /* Null out the new namespace information slots */ 1379 for (i = old_num_ns; i < new_num_ns; i++) { 1380 memset(&sgroup->ns_info[i], 0, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1381 } 1382 } else if (new_num_ns < old_num_ns) { 1383 void *buf; 1384 1385 /* Free the extra I/O channels */ 1386 for (i = new_num_ns; i < old_num_ns; i++) { 1387 ns_info = &sgroup->ns_info[i]; 1388 1389 if (ns_info->channel) { 1390 spdk_put_io_channel(ns_info->channel); 1391 ns_info->channel = NULL; 1392 } 1393 } 1394 1395 /* Make the array smaller */ 1396 if (new_num_ns > 0) { 1397 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1398 if (!buf) { 1399 return -ENOMEM; 1400 } 1401 sgroup->ns_info = buf; 1402 } else { 1403 free(sgroup->ns_info); 1404 sgroup->ns_info = NULL; 1405 } 1406 } 1407 1408 sgroup->num_ns = new_num_ns; 1409 1410 /* Detect bdevs that were added or removed */ 1411 for (i = 0; i < sgroup->num_ns; i++) { 1412 ns = subsystem->ns[i]; 1413 ns_info = &sgroup->ns_info[i]; 1414 ch = ns_info->channel; 1415 1416 if (ns == NULL && ch == NULL) { 1417 /* Both NULL. Leave empty */ 1418 } else if (ns == NULL && ch != NULL) { 1419 /* There was a channel here, but the namespace is gone. */ 1420 ns_changed = true; 1421 spdk_put_io_channel(ch); 1422 ns_info->channel = NULL; 1423 } else if (ns != NULL && ch == NULL) { 1424 /* A namespace appeared but there is no channel yet */ 1425 ns_changed = true; 1426 ch = spdk_bdev_get_io_channel(ns->desc); 1427 if (ch == NULL) { 1428 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1429 return -ENOMEM; 1430 } 1431 ns_info->channel = ch; 1432 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) { 1433 /* A namespace was here before, but was replaced by a new one. */ 1434 ns_changed = true; 1435 spdk_put_io_channel(ns_info->channel); 1436 memset(ns_info, 0, sizeof(*ns_info)); 1437 1438 ch = spdk_bdev_get_io_channel(ns->desc); 1439 if (ch == NULL) { 1440 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1441 return -ENOMEM; 1442 } 1443 ns_info->channel = ch; 1444 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) { 1445 /* Namespace is still there but size has changed */ 1446 SPDK_DEBUGLOG(nvmf, "Namespace resized: subsystem_id %u," 1447 " nsid %u, pg %p, old %" PRIu64 ", new %" PRIu64 "\n", 1448 subsystem->id, 1449 ns->nsid, 1450 group, 1451 ns_info->num_blocks, 1452 spdk_bdev_get_num_blocks(ns->bdev)); 1453 ns_changed = true; 1454 } 1455 1456 if (ns == NULL) { 1457 memset(ns_info, 0, sizeof(*ns_info)); 1458 } else { 1459 ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev); 1460 ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev); 1461 ns_info->crkey = ns->crkey; 1462 ns_info->rtype = ns->rtype; 1463 if (ns->holder) { 1464 ns_info->holder_id = ns->holder->hostid; 1465 } 1466 1467 memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid)); 1468 j = 0; 1469 TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) { 1470 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) { 1471 SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS); 1472 return -EINVAL; 1473 } 1474 ns_info->reg_hostid[j++] = reg->hostid; 1475 } 1476 } 1477 } 1478 1479 if (ns_changed) { 1480 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) { 1481 if (ctrlr->thread != spdk_get_thread()) { 1482 continue; 1483 } 1484 /* It is possible that a ctrlr was added but the admin_qpair hasn't been 1485 * assigned yet. 1486 */ 1487 if (!ctrlr->admin_qpair) { 1488 continue; 1489 } 1490 if (ctrlr->admin_qpair->group == group) { 1491 nvmf_ctrlr_async_event_ns_notice(ctrlr); 1492 nvmf_ctrlr_async_event_ana_change_notice(ctrlr); 1493 } 1494 } 1495 } 1496 1497 return 0; 1498 } 1499 1500 int 1501 nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1502 struct spdk_nvmf_subsystem *subsystem) 1503 { 1504 return poll_group_update_subsystem(group, subsystem); 1505 } 1506 1507 int 1508 nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group, 1509 struct spdk_nvmf_subsystem *subsystem, 1510 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1511 { 1512 int rc = 0; 1513 struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id]; 1514 uint32_t i; 1515 1516 TAILQ_INIT(&sgroup->queued); 1517 1518 rc = poll_group_update_subsystem(group, subsystem); 1519 if (rc) { 1520 nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL); 1521 goto fini; 1522 } 1523 1524 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1525 1526 for (i = 0; i < sgroup->num_ns; i++) { 1527 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1528 } 1529 1530 fini: 1531 if (cb_fn) { 1532 cb_fn(cb_arg, rc); 1533 } 1534 1535 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_subsystem, spdk_thread_get_id(group->thread), 1536 subsystem->subnqn); 1537 1538 return rc; 1539 } 1540 1541 static void 1542 _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status) 1543 { 1544 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1545 struct spdk_nvmf_subsystem *subsystem; 1546 struct spdk_nvmf_poll_group *group; 1547 struct spdk_nvmf_subsystem_poll_group *sgroup; 1548 spdk_nvmf_poll_group_mod_done cpl_fn = NULL; 1549 void *cpl_ctx = NULL; 1550 uint32_t nsid; 1551 1552 group = qpair_ctx->group; 1553 subsystem = qpair_ctx->subsystem; 1554 cpl_fn = qpair_ctx->cpl_fn; 1555 cpl_ctx = qpair_ctx->cpl_ctx; 1556 sgroup = &group->sgroups[subsystem->id]; 1557 1558 if (status) { 1559 goto fini; 1560 } 1561 1562 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 1563 if (sgroup->ns_info[nsid].channel) { 1564 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 1565 sgroup->ns_info[nsid].channel = NULL; 1566 } 1567 } 1568 1569 sgroup->num_ns = 0; 1570 free(sgroup->ns_info); 1571 sgroup->ns_info = NULL; 1572 fini: 1573 free(qpair_ctx); 1574 if (cpl_fn) { 1575 cpl_fn(cpl_ctx, status); 1576 } 1577 } 1578 1579 static void nvmf_poll_group_remove_subsystem_msg(void *ctx); 1580 1581 static void 1582 nvmf_poll_group_remove_subsystem_msg(void *ctx) 1583 { 1584 struct spdk_nvmf_qpair *qpair, *qpair_tmp; 1585 struct spdk_nvmf_subsystem *subsystem; 1586 struct spdk_nvmf_poll_group *group; 1587 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1588 bool qpairs_found = false; 1589 int rc = 0; 1590 1591 group = qpair_ctx->group; 1592 subsystem = qpair_ctx->subsystem; 1593 1594 TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) { 1595 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) { 1596 qpairs_found = true; 1597 rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 1598 if (rc && rc != -EINPROGRESS) { 1599 break; 1600 } 1601 } 1602 } 1603 1604 if (!qpairs_found) { 1605 _nvmf_poll_group_remove_subsystem_cb(ctx, 0); 1606 return; 1607 } 1608 1609 /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */ 1610 spdk_thread_send_msg(spdk_get_thread(), nvmf_poll_group_remove_subsystem_msg, ctx); 1611 } 1612 1613 void 1614 nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group, 1615 struct spdk_nvmf_subsystem *subsystem, 1616 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1617 { 1618 struct spdk_nvmf_subsystem_poll_group *sgroup; 1619 struct nvmf_qpair_disconnect_many_ctx *ctx; 1620 uint32_t i; 1621 1622 SPDK_DTRACE_PROBE3_TICKS(nvmf_poll_group_remove_subsystem, group, spdk_thread_get_id(group->thread), 1623 subsystem->subnqn); 1624 1625 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 1626 if (!ctx) { 1627 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n"); 1628 if (cb_fn) { 1629 cb_fn(cb_arg, -1); 1630 } 1631 return; 1632 } 1633 1634 ctx->group = group; 1635 ctx->subsystem = subsystem; 1636 ctx->cpl_fn = cb_fn; 1637 ctx->cpl_ctx = cb_arg; 1638 1639 sgroup = &group->sgroups[subsystem->id]; 1640 sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE; 1641 1642 for (i = 0; i < sgroup->num_ns; i++) { 1643 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_INACTIVE; 1644 } 1645 1646 nvmf_poll_group_remove_subsystem_msg(ctx); 1647 } 1648 1649 void 1650 nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group, 1651 struct spdk_nvmf_subsystem *subsystem, 1652 uint32_t nsid, 1653 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1654 { 1655 struct spdk_nvmf_subsystem_poll_group *sgroup; 1656 struct spdk_nvmf_subsystem_pg_ns_info *ns_info = NULL; 1657 int rc = 0; 1658 uint32_t i; 1659 1660 if (subsystem->id >= group->num_sgroups) { 1661 rc = -1; 1662 goto fini; 1663 } 1664 1665 sgroup = &group->sgroups[subsystem->id]; 1666 if (sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED) { 1667 goto fini; 1668 } 1669 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1670 1671 if (nsid == SPDK_NVME_GLOBAL_NS_TAG) { 1672 for (i = 0; i < sgroup->num_ns; i++) { 1673 ns_info = &sgroup->ns_info[i]; 1674 ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1675 } 1676 } else { 1677 /* NOTE: This implicitly also checks for 0, since 0 - 1 wraps around to UINT32_MAX. */ 1678 if (nsid - 1 < sgroup->num_ns) { 1679 ns_info = &sgroup->ns_info[nsid - 1]; 1680 ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1681 } 1682 } 1683 1684 if (sgroup->mgmt_io_outstanding > 0) { 1685 assert(sgroup->cb_fn == NULL); 1686 sgroup->cb_fn = cb_fn; 1687 assert(sgroup->cb_arg == NULL); 1688 sgroup->cb_arg = cb_arg; 1689 return; 1690 } 1691 1692 if (nsid == SPDK_NVME_GLOBAL_NS_TAG) { 1693 for (i = 0; i < sgroup->num_ns; i++) { 1694 ns_info = &sgroup->ns_info[i]; 1695 1696 if (ns_info->io_outstanding > 0) { 1697 assert(sgroup->cb_fn == NULL); 1698 sgroup->cb_fn = cb_fn; 1699 assert(sgroup->cb_arg == NULL); 1700 sgroup->cb_arg = cb_arg; 1701 return; 1702 } 1703 } 1704 } else { 1705 if (ns_info != NULL && ns_info->io_outstanding > 0) { 1706 assert(sgroup->cb_fn == NULL); 1707 sgroup->cb_fn = cb_fn; 1708 assert(sgroup->cb_arg == NULL); 1709 sgroup->cb_arg = cb_arg; 1710 return; 1711 } 1712 } 1713 1714 assert(sgroup->mgmt_io_outstanding == 0); 1715 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED; 1716 fini: 1717 if (cb_fn) { 1718 cb_fn(cb_arg, rc); 1719 } 1720 } 1721 1722 void 1723 nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group, 1724 struct spdk_nvmf_subsystem *subsystem, 1725 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1726 { 1727 struct spdk_nvmf_request *req, *tmp; 1728 struct spdk_nvmf_subsystem_poll_group *sgroup; 1729 int rc = 0; 1730 uint32_t i; 1731 1732 if (subsystem->id >= group->num_sgroups) { 1733 rc = -1; 1734 goto fini; 1735 } 1736 1737 sgroup = &group->sgroups[subsystem->id]; 1738 1739 if (sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE) { 1740 goto fini; 1741 } 1742 1743 rc = poll_group_update_subsystem(group, subsystem); 1744 if (rc) { 1745 goto fini; 1746 } 1747 1748 for (i = 0; i < sgroup->num_ns; i++) { 1749 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1750 } 1751 1752 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1753 1754 /* Release all queued requests */ 1755 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 1756 TAILQ_REMOVE(&sgroup->queued, req, link); 1757 if (spdk_nvmf_request_using_zcopy(req)) { 1758 spdk_nvmf_request_zcopy_start(req); 1759 } else { 1760 spdk_nvmf_request_exec(req); 1761 } 1762 1763 } 1764 fini: 1765 if (cb_fn) { 1766 cb_fn(cb_arg, rc); 1767 } 1768 } 1769 1770 1771 struct spdk_nvmf_poll_group * 1772 spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair) 1773 { 1774 struct spdk_nvmf_transport_poll_group *tgroup; 1775 1776 tgroup = nvmf_transport_get_optimal_poll_group(qpair->transport, qpair); 1777 1778 if (tgroup == NULL) { 1779 return NULL; 1780 } 1781 1782 return tgroup->group; 1783 } 1784 1785 void 1786 spdk_nvmf_poll_group_dump_stat(struct spdk_nvmf_poll_group *group, struct spdk_json_write_ctx *w) 1787 { 1788 struct spdk_nvmf_transport_poll_group *tgroup; 1789 1790 spdk_json_write_object_begin(w); 1791 1792 spdk_json_write_named_string(w, "name", spdk_thread_get_name(spdk_get_thread())); 1793 spdk_json_write_named_uint32(w, "admin_qpairs", group->stat.admin_qpairs); 1794 spdk_json_write_named_uint32(w, "io_qpairs", group->stat.io_qpairs); 1795 spdk_json_write_named_uint32(w, "current_admin_qpairs", group->stat.current_admin_qpairs); 1796 spdk_json_write_named_uint32(w, "current_io_qpairs", group->stat.current_io_qpairs); 1797 spdk_json_write_named_uint64(w, "pending_bdev_io", group->stat.pending_bdev_io); 1798 spdk_json_write_named_uint64(w, "completed_nvme_io", group->stat.completed_nvme_io); 1799 1800 spdk_json_write_named_array_begin(w, "transports"); 1801 1802 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 1803 spdk_json_write_object_begin(w); 1804 /* 1805 * The trtype field intentionally contains a transport name as this is more informative. 1806 * The field has not been renamed for backward compatibility. 1807 */ 1808 spdk_json_write_named_string(w, "trtype", spdk_nvmf_get_transport_name(tgroup->transport)); 1809 1810 if (tgroup->transport->ops->poll_group_dump_stat) { 1811 tgroup->transport->ops->poll_group_dump_stat(tgroup, w); 1812 } 1813 1814 spdk_json_write_object_end(w); 1815 } 1816 1817 spdk_json_write_array_end(w); 1818 spdk_json_write_object_end(w); 1819 } 1820