1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. All rights reserved. 5 * Copyright (c) 2018-2019 Mellanox Technologies LTD. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "spdk/stdinc.h" 35 36 #include "spdk/bdev.h" 37 #include "spdk/bit_array.h" 38 #include "spdk/conf.h" 39 #include "spdk/thread.h" 40 #include "spdk/nvmf.h" 41 #include "spdk/trace.h" 42 #include "spdk/endian.h" 43 #include "spdk/string.h" 44 45 #include "spdk_internal/log.h" 46 47 #include "nvmf_internal.h" 48 #include "transport.h" 49 50 SPDK_LOG_REGISTER_COMPONENT(nvmf) 51 52 #define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024 53 #define SPDK_NVMF_DEFAULT_ACCEPT_POLL_RATE_US 10000 54 55 static TAILQ_HEAD(, spdk_nvmf_tgt) g_nvmf_tgts = TAILQ_HEAD_INITIALIZER(g_nvmf_tgts); 56 57 typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status); 58 static void nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf); 59 60 /* supplied to a single call to nvmf_qpair_disconnect */ 61 struct nvmf_qpair_disconnect_ctx { 62 struct spdk_nvmf_qpair *qpair; 63 struct spdk_nvmf_ctrlr *ctrlr; 64 nvmf_qpair_disconnect_cb cb_fn; 65 struct spdk_thread *thread; 66 void *ctx; 67 uint16_t qid; 68 }; 69 70 /* 71 * There are several times when we need to iterate through the list of all qpairs and selectively delete them. 72 * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from 73 * to enable calling nvmf_qpair_disconnect on the next desired qpair. 74 */ 75 struct nvmf_qpair_disconnect_many_ctx { 76 struct spdk_nvmf_subsystem *subsystem; 77 struct spdk_nvmf_poll_group *group; 78 spdk_nvmf_poll_group_mod_done cpl_fn; 79 void *cpl_ctx; 80 }; 81 82 static void 83 nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair, 84 enum spdk_nvmf_qpair_state state) 85 { 86 assert(qpair != NULL); 87 assert(qpair->group->thread == spdk_get_thread()); 88 89 qpair->state = state; 90 } 91 92 static int 93 nvmf_poll_group_poll(void *ctx) 94 { 95 struct spdk_nvmf_poll_group *group = ctx; 96 int rc; 97 int count = 0; 98 struct spdk_nvmf_transport_poll_group *tgroup; 99 100 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 101 rc = nvmf_transport_poll_group_poll(tgroup); 102 if (rc < 0) { 103 return SPDK_POLLER_BUSY; 104 } 105 count += rc; 106 } 107 108 return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE; 109 } 110 111 static int 112 nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf) 113 { 114 struct spdk_nvmf_tgt *tgt = io_device; 115 struct spdk_nvmf_poll_group *group = ctx_buf; 116 struct spdk_nvmf_transport *transport; 117 uint32_t sid; 118 119 TAILQ_INIT(&group->tgroups); 120 TAILQ_INIT(&group->qpairs); 121 122 TAILQ_FOREACH(transport, &tgt->transports, link) { 123 nvmf_poll_group_add_transport(group, transport); 124 } 125 126 group->num_sgroups = tgt->max_subsystems; 127 group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group)); 128 if (!group->sgroups) { 129 return -ENOMEM; 130 } 131 132 for (sid = 0; sid < tgt->max_subsystems; sid++) { 133 struct spdk_nvmf_subsystem *subsystem; 134 135 subsystem = tgt->subsystems[sid]; 136 if (!subsystem) { 137 continue; 138 } 139 140 if (nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) { 141 nvmf_tgt_destroy_poll_group(io_device, ctx_buf); 142 return -1; 143 } 144 } 145 146 pthread_mutex_lock(&tgt->mutex); 147 TAILQ_INSERT_TAIL(&tgt->poll_groups, group, link); 148 pthread_mutex_unlock(&tgt->mutex); 149 150 group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0); 151 group->thread = spdk_get_thread(); 152 153 return 0; 154 } 155 156 static void 157 nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf) 158 { 159 struct spdk_nvmf_tgt *tgt = io_device; 160 struct spdk_nvmf_poll_group *group = ctx_buf; 161 struct spdk_nvmf_transport_poll_group *tgroup, *tmp; 162 struct spdk_nvmf_subsystem_poll_group *sgroup; 163 uint32_t sid, nsid; 164 165 pthread_mutex_lock(&tgt->mutex); 166 TAILQ_REMOVE(&tgt->poll_groups, group, link); 167 pthread_mutex_unlock(&tgt->mutex); 168 169 TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { 170 TAILQ_REMOVE(&group->tgroups, tgroup, link); 171 nvmf_transport_poll_group_destroy(tgroup); 172 } 173 174 for (sid = 0; sid < group->num_sgroups; sid++) { 175 sgroup = &group->sgroups[sid]; 176 177 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 178 if (sgroup->ns_info[nsid].channel) { 179 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 180 sgroup->ns_info[nsid].channel = NULL; 181 } 182 } 183 184 free(sgroup->ns_info); 185 } 186 187 free(group->sgroups); 188 189 spdk_poller_unregister(&group->poller); 190 191 if (group->destroy_cb_fn) { 192 group->destroy_cb_fn(group->destroy_cb_arg, 0); 193 } 194 } 195 196 static void 197 _nvmf_tgt_disconnect_next_qpair(void *ctx) 198 { 199 struct spdk_nvmf_qpair *qpair; 200 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 201 struct spdk_nvmf_poll_group *group = qpair_ctx->group; 202 struct spdk_io_channel *ch; 203 int rc = 0; 204 205 qpair = TAILQ_FIRST(&group->qpairs); 206 207 if (qpair) { 208 rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_tgt_disconnect_next_qpair, ctx); 209 } 210 211 if (!qpair || rc != 0) { 212 /* When the refcount from the channels reaches 0, nvmf_tgt_destroy_poll_group will be called. */ 213 ch = spdk_io_channel_from_ctx(group); 214 spdk_put_io_channel(ch); 215 free(qpair_ctx); 216 } 217 } 218 219 static void 220 nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group) 221 { 222 struct nvmf_qpair_disconnect_many_ctx *ctx; 223 224 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 225 226 if (!ctx) { 227 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n"); 228 return; 229 } 230 231 ctx->group = group; 232 _nvmf_tgt_disconnect_next_qpair(ctx); 233 } 234 235 static int 236 nvmf_tgt_accept(void *ctx) 237 { 238 struct spdk_nvmf_tgt *tgt = ctx; 239 struct spdk_nvmf_transport *transport, *tmp; 240 int count = 0; 241 242 TAILQ_FOREACH_SAFE(transport, &tgt->transports, link, tmp) { 243 count += nvmf_transport_accept(transport); 244 } 245 246 return count; 247 } 248 249 struct spdk_nvmf_tgt * 250 spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *opts) 251 { 252 struct spdk_nvmf_tgt *tgt, *tmp_tgt; 253 uint32_t acceptor_poll_rate; 254 255 if (strnlen(opts->name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) { 256 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH); 257 return NULL; 258 } 259 260 TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) { 261 if (!strncmp(opts->name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) { 262 SPDK_ERRLOG("Provided target name must be unique.\n"); 263 return NULL; 264 } 265 } 266 267 tgt = calloc(1, sizeof(*tgt)); 268 if (!tgt) { 269 return NULL; 270 } 271 272 snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts->name); 273 274 if (!opts || !opts->max_subsystems) { 275 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS; 276 } else { 277 tgt->max_subsystems = opts->max_subsystems; 278 } 279 280 if (!opts || !opts->acceptor_poll_rate) { 281 acceptor_poll_rate = SPDK_NVMF_DEFAULT_ACCEPT_POLL_RATE_US; 282 } else { 283 acceptor_poll_rate = opts->acceptor_poll_rate; 284 } 285 286 tgt->discovery_genctr = 0; 287 TAILQ_INIT(&tgt->transports); 288 TAILQ_INIT(&tgt->poll_groups); 289 290 tgt->subsystems = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem *)); 291 if (!tgt->subsystems) { 292 free(tgt); 293 return NULL; 294 } 295 296 pthread_mutex_init(&tgt->mutex, NULL); 297 298 tgt->accept_poller = SPDK_POLLER_REGISTER(nvmf_tgt_accept, tgt, acceptor_poll_rate); 299 if (!tgt->accept_poller) { 300 pthread_mutex_destroy(&tgt->mutex); 301 free(tgt->subsystems); 302 free(tgt); 303 return NULL; 304 } 305 306 spdk_io_device_register(tgt, 307 nvmf_tgt_create_poll_group, 308 nvmf_tgt_destroy_poll_group, 309 sizeof(struct spdk_nvmf_poll_group), 310 tgt->name); 311 312 TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link); 313 314 return tgt; 315 } 316 317 static void 318 nvmf_tgt_destroy_cb(void *io_device) 319 { 320 struct spdk_nvmf_tgt *tgt = io_device; 321 struct spdk_nvmf_transport *transport, *transport_tmp; 322 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn; 323 void *destroy_cb_arg; 324 uint32_t i; 325 326 if (tgt->subsystems) { 327 for (i = 0; i < tgt->max_subsystems; i++) { 328 if (tgt->subsystems[i]) { 329 nvmf_subsystem_remove_all_listeners(tgt->subsystems[i], true); 330 spdk_nvmf_subsystem_destroy(tgt->subsystems[i]); 331 } 332 } 333 free(tgt->subsystems); 334 } 335 336 TAILQ_FOREACH_SAFE(transport, &tgt->transports, link, transport_tmp) { 337 TAILQ_REMOVE(&tgt->transports, transport, link); 338 spdk_nvmf_transport_destroy(transport); 339 } 340 341 destroy_cb_fn = tgt->destroy_cb_fn; 342 destroy_cb_arg = tgt->destroy_cb_arg; 343 344 pthread_mutex_destroy(&tgt->mutex); 345 free(tgt); 346 347 if (destroy_cb_fn) { 348 destroy_cb_fn(destroy_cb_arg, 0); 349 } 350 } 351 352 void 353 spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt, 354 spdk_nvmf_tgt_destroy_done_fn cb_fn, 355 void *cb_arg) 356 { 357 tgt->destroy_cb_fn = cb_fn; 358 tgt->destroy_cb_arg = cb_arg; 359 360 spdk_poller_unregister(&tgt->accept_poller); 361 362 TAILQ_REMOVE(&g_nvmf_tgts, tgt, link); 363 364 spdk_io_device_unregister(tgt, nvmf_tgt_destroy_cb); 365 } 366 367 const char * 368 spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt) 369 { 370 return tgt->name; 371 } 372 373 struct spdk_nvmf_tgt * 374 spdk_nvmf_get_tgt(const char *name) 375 { 376 struct spdk_nvmf_tgt *tgt; 377 uint32_t num_targets = 0; 378 379 TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) { 380 if (name) { 381 if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) { 382 return tgt; 383 } 384 } 385 num_targets++; 386 } 387 388 /* 389 * special case. If there is only one target and 390 * no name was specified, return the only available 391 * target. If there is more than one target, name must 392 * be specified. 393 */ 394 if (!name && num_targets == 1) { 395 return TAILQ_FIRST(&g_nvmf_tgts); 396 } 397 398 return NULL; 399 } 400 401 struct spdk_nvmf_tgt * 402 spdk_nvmf_get_first_tgt(void) 403 { 404 return TAILQ_FIRST(&g_nvmf_tgts); 405 } 406 407 struct spdk_nvmf_tgt * 408 spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev) 409 { 410 return TAILQ_NEXT(prev, link); 411 } 412 413 static void 414 nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w, 415 struct spdk_nvmf_subsystem *subsystem) 416 { 417 struct spdk_nvmf_host *host; 418 struct spdk_nvmf_subsystem_listener *listener; 419 const struct spdk_nvme_transport_id *trid; 420 struct spdk_nvmf_ns *ns; 421 struct spdk_nvmf_ns_opts ns_opts; 422 uint32_t max_namespaces; 423 char uuid_str[SPDK_UUID_STRING_LEN]; 424 const char *adrfam; 425 426 if (spdk_nvmf_subsystem_get_type(subsystem) != SPDK_NVMF_SUBTYPE_NVME) { 427 return; 428 } 429 430 /* { */ 431 spdk_json_write_object_begin(w); 432 spdk_json_write_named_string(w, "method", "nvmf_create_subsystem"); 433 434 /* "params" : { */ 435 spdk_json_write_named_object_begin(w, "params"); 436 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 437 spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem)); 438 spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem)); 439 spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem)); 440 441 max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem); 442 if (max_namespaces != 0) { 443 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces); 444 } 445 446 /* } "params" */ 447 spdk_json_write_object_end(w); 448 449 /* } */ 450 spdk_json_write_object_end(w); 451 452 for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL; 453 listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) { 454 trid = spdk_nvmf_subsystem_listener_get_trid(listener); 455 456 adrfam = spdk_nvme_transport_id_adrfam_str(trid->adrfam); 457 458 spdk_json_write_object_begin(w); 459 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener"); 460 461 /* "params" : { */ 462 spdk_json_write_named_object_begin(w, "params"); 463 464 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 465 466 /* "listen_address" : { */ 467 spdk_json_write_named_object_begin(w, "listen_address"); 468 469 spdk_json_write_named_string(w, "trtype", trid->trstring); 470 if (adrfam) { 471 spdk_json_write_named_string(w, "adrfam", adrfam); 472 } 473 474 spdk_json_write_named_string(w, "traddr", trid->traddr); 475 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid); 476 /* } "listen_address" */ 477 spdk_json_write_object_end(w); 478 479 /* } "params" */ 480 spdk_json_write_object_end(w); 481 482 /* } */ 483 spdk_json_write_object_end(w); 484 } 485 486 for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL; 487 host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) { 488 489 spdk_json_write_object_begin(w); 490 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host"); 491 492 /* "params" : { */ 493 spdk_json_write_named_object_begin(w, "params"); 494 495 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 496 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host)); 497 498 /* } "params" */ 499 spdk_json_write_object_end(w); 500 501 /* } */ 502 spdk_json_write_object_end(w); 503 } 504 505 for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL; 506 ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) { 507 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts)); 508 509 spdk_json_write_object_begin(w); 510 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns"); 511 512 /* "params" : { */ 513 spdk_json_write_named_object_begin(w, "params"); 514 515 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 516 517 /* "namespace" : { */ 518 spdk_json_write_named_object_begin(w, "namespace"); 519 520 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns)); 521 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns))); 522 523 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) { 524 SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch"); 525 spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]), 526 from_be64(&ns_opts.nguid[8])); 527 } 528 529 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) { 530 SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch"); 531 spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64)); 532 } 533 534 if (!spdk_mem_all_zero(&ns_opts.uuid, sizeof(ns_opts.uuid))) { 535 spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &ns_opts.uuid); 536 spdk_json_write_named_string(w, "uuid", uuid_str); 537 } 538 539 /* "namespace" */ 540 spdk_json_write_object_end(w); 541 542 /* } "params" */ 543 spdk_json_write_object_end(w); 544 545 /* } */ 546 spdk_json_write_object_end(w); 547 } 548 } 549 550 void 551 spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt) 552 { 553 struct spdk_nvmf_subsystem *subsystem; 554 struct spdk_nvmf_transport *transport; 555 556 spdk_json_write_object_begin(w); 557 spdk_json_write_named_string(w, "method", "nvmf_set_max_subsystems"); 558 559 spdk_json_write_named_object_begin(w, "params"); 560 spdk_json_write_named_uint32(w, "max_subsystems", tgt->max_subsystems); 561 spdk_json_write_object_end(w); 562 563 spdk_json_write_object_end(w); 564 565 /* write transports */ 566 TAILQ_FOREACH(transport, &tgt->transports, link) { 567 spdk_json_write_object_begin(w); 568 spdk_json_write_named_string(w, "method", "nvmf_create_transport"); 569 570 spdk_json_write_named_object_begin(w, "params"); 571 spdk_json_write_named_string(w, "trtype", spdk_nvme_transport_id_trtype_str(transport->ops->type)); 572 spdk_json_write_named_uint32(w, "max_queue_depth", transport->opts.max_queue_depth); 573 spdk_json_write_named_uint32(w, "max_io_qpairs_per_ctrlr", 574 transport->opts.max_qpairs_per_ctrlr - 1); 575 spdk_json_write_named_uint32(w, "in_capsule_data_size", transport->opts.in_capsule_data_size); 576 spdk_json_write_named_uint32(w, "max_io_size", transport->opts.max_io_size); 577 spdk_json_write_named_uint32(w, "io_unit_size", transport->opts.io_unit_size); 578 spdk_json_write_named_uint32(w, "max_aq_depth", transport->opts.max_aq_depth); 579 if (transport->ops->type == SPDK_NVME_TRANSPORT_RDMA) { 580 spdk_json_write_named_uint32(w, "max_srq_depth", transport->opts.max_srq_depth); 581 } 582 spdk_json_write_named_uint32(w, "abort_timeout_sec", transport->opts.abort_timeout_sec); 583 spdk_json_write_object_end(w); 584 585 spdk_json_write_object_end(w); 586 } 587 588 subsystem = spdk_nvmf_subsystem_get_first(tgt); 589 while (subsystem) { 590 nvmf_write_subsystem_config_json(w, subsystem); 591 subsystem = spdk_nvmf_subsystem_get_next(subsystem); 592 } 593 } 594 595 int 596 spdk_nvmf_tgt_listen(struct spdk_nvmf_tgt *tgt, 597 struct spdk_nvme_transport_id *trid) 598 { 599 struct spdk_nvmf_transport *transport; 600 const char *trtype; 601 int rc; 602 603 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 604 if (!transport) { 605 trtype = spdk_nvme_transport_id_trtype_str(trid->trtype); 606 if (trtype != NULL) { 607 SPDK_ERRLOG("Unable to listen on transport %s. The transport must be created first.\n", trtype); 608 } else { 609 SPDK_ERRLOG("The specified trtype %d is unknown. Please make sure that it is properly registered.\n", 610 trid->trtype); 611 } 612 613 return -EINVAL; 614 } 615 616 rc = spdk_nvmf_transport_listen(transport, trid); 617 if (rc < 0) { 618 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr); 619 } 620 621 return rc; 622 } 623 624 int 625 spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt, 626 struct spdk_nvme_transport_id *trid) 627 { 628 struct spdk_nvmf_transport *transport; 629 const char *trtype; 630 int rc; 631 632 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 633 if (!transport) { 634 trtype = spdk_nvme_transport_id_trtype_str(trid->trtype); 635 if (trtype != NULL) { 636 SPDK_ERRLOG("Unable to stop listen on transport %s. The transport must be created first.\n", 637 trtype); 638 } else { 639 SPDK_ERRLOG("The specified trtype %d is unknown. Please make sure that it is properly registered.\n", 640 trid->trtype); 641 } 642 return -EINVAL; 643 } 644 645 rc = spdk_nvmf_transport_stop_listen(transport, trid); 646 if (rc < 0) { 647 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr); 648 return rc; 649 } 650 return 0; 651 } 652 653 struct spdk_nvmf_tgt_add_transport_ctx { 654 struct spdk_nvmf_tgt *tgt; 655 struct spdk_nvmf_transport *transport; 656 spdk_nvmf_tgt_add_transport_done_fn cb_fn; 657 void *cb_arg; 658 }; 659 660 static void 661 _nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status) 662 { 663 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 664 665 ctx->cb_fn(ctx->cb_arg, status); 666 667 free(ctx); 668 } 669 670 static void 671 _nvmf_tgt_add_transport(struct spdk_io_channel_iter *i) 672 { 673 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 674 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 675 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 676 int rc; 677 678 rc = nvmf_poll_group_add_transport(group, ctx->transport); 679 spdk_for_each_channel_continue(i, rc); 680 } 681 682 void spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt, 683 struct spdk_nvmf_transport *transport, 684 spdk_nvmf_tgt_add_transport_done_fn cb_fn, 685 void *cb_arg) 686 { 687 struct spdk_nvmf_tgt_add_transport_ctx *ctx; 688 689 if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) { 690 cb_fn(cb_arg, -EEXIST); 691 return; /* transport already created */ 692 } 693 694 transport->tgt = tgt; 695 TAILQ_INSERT_TAIL(&tgt->transports, transport, link); 696 697 ctx = calloc(1, sizeof(*ctx)); 698 if (!ctx) { 699 cb_fn(cb_arg, -ENOMEM); 700 return; 701 } 702 703 ctx->tgt = tgt; 704 ctx->transport = transport; 705 ctx->cb_fn = cb_fn; 706 ctx->cb_arg = cb_arg; 707 708 spdk_for_each_channel(tgt, 709 _nvmf_tgt_add_transport, 710 ctx, 711 _nvmf_tgt_add_transport_done); 712 } 713 714 struct spdk_nvmf_subsystem * 715 spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn) 716 { 717 struct spdk_nvmf_subsystem *subsystem; 718 uint32_t sid; 719 720 if (!subnqn) { 721 return NULL; 722 } 723 724 /* Ensure that subnqn is null terminated */ 725 if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) { 726 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n"); 727 return NULL; 728 } 729 730 for (sid = 0; sid < tgt->max_subsystems; sid++) { 731 subsystem = tgt->subsystems[sid]; 732 if (subsystem == NULL) { 733 continue; 734 } 735 736 if (strcmp(subnqn, subsystem->subnqn) == 0) { 737 return subsystem; 738 } 739 } 740 741 return NULL; 742 } 743 744 struct spdk_nvmf_transport * 745 spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name) 746 { 747 struct spdk_nvmf_transport *transport; 748 749 TAILQ_FOREACH(transport, &tgt->transports, link) { 750 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) { 751 return transport; 752 } 753 } 754 return NULL; 755 } 756 757 struct nvmf_new_qpair_ctx { 758 struct spdk_nvmf_qpair *qpair; 759 struct spdk_nvmf_poll_group *group; 760 }; 761 762 static void 763 _nvmf_poll_group_add(void *_ctx) 764 { 765 struct nvmf_new_qpair_ctx *ctx = _ctx; 766 struct spdk_nvmf_qpair *qpair = ctx->qpair; 767 struct spdk_nvmf_poll_group *group = ctx->group; 768 769 free(_ctx); 770 771 if (spdk_nvmf_poll_group_add(group, qpair) != 0) { 772 SPDK_ERRLOG("Unable to add the qpair to a poll group.\n"); 773 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 774 } 775 } 776 777 void 778 spdk_nvmf_tgt_new_qpair(struct spdk_nvmf_tgt *tgt, struct spdk_nvmf_qpair *qpair) 779 { 780 struct spdk_nvmf_poll_group *group; 781 struct nvmf_new_qpair_ctx *ctx; 782 783 group = spdk_nvmf_get_optimal_poll_group(qpair); 784 if (group == NULL) { 785 if (tgt->next_poll_group == NULL) { 786 tgt->next_poll_group = TAILQ_FIRST(&tgt->poll_groups); 787 if (tgt->next_poll_group == NULL) { 788 SPDK_ERRLOG("No poll groups exist.\n"); 789 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 790 return; 791 } 792 } 793 group = tgt->next_poll_group; 794 tgt->next_poll_group = TAILQ_NEXT(group, link); 795 } 796 797 ctx = calloc(1, sizeof(*ctx)); 798 if (!ctx) { 799 SPDK_ERRLOG("Unable to send message to poll group.\n"); 800 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 801 return; 802 } 803 804 ctx->qpair = qpair; 805 ctx->group = group; 806 807 spdk_thread_send_msg(group->thread, _nvmf_poll_group_add, ctx); 808 } 809 810 struct spdk_nvmf_poll_group * 811 spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt) 812 { 813 struct spdk_io_channel *ch; 814 815 ch = spdk_get_io_channel(tgt); 816 if (!ch) { 817 SPDK_ERRLOG("Unable to get I/O channel for target\n"); 818 return NULL; 819 } 820 821 return spdk_io_channel_get_ctx(ch); 822 } 823 824 void 825 spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group, 826 spdk_nvmf_poll_group_destroy_done_fn cb_fn, 827 void *cb_arg) 828 { 829 assert(group->destroy_cb_fn == NULL); 830 group->destroy_cb_fn = cb_fn; 831 group->destroy_cb_arg = cb_arg; 832 833 /* This function will put the io_channel associated with this poll group */ 834 nvmf_tgt_destroy_poll_group_qpairs(group); 835 } 836 837 int 838 spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group, 839 struct spdk_nvmf_qpair *qpair) 840 { 841 int rc = -1; 842 struct spdk_nvmf_transport_poll_group *tgroup; 843 844 TAILQ_INIT(&qpair->outstanding); 845 qpair->group = group; 846 847 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 848 if (tgroup->transport == qpair->transport) { 849 rc = nvmf_transport_poll_group_add(tgroup, qpair); 850 break; 851 } 852 } 853 854 /* We add the qpair to the group only it is succesfully added into the tgroup */ 855 if (rc == 0) { 856 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link); 857 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVE); 858 } 859 860 return rc; 861 } 862 863 static void 864 _nvmf_ctrlr_destruct(void *ctx) 865 { 866 struct spdk_nvmf_ctrlr *ctrlr = ctx; 867 868 nvmf_ctrlr_destruct(ctrlr); 869 } 870 871 static void 872 _nvmf_transport_qpair_fini(void *ctx) 873 { 874 struct spdk_nvmf_qpair *qpair = ctx; 875 876 nvmf_transport_qpair_fini(qpair); 877 } 878 879 static void 880 _nvmf_ctrlr_free_from_qpair(void *ctx) 881 { 882 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 883 struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr; 884 uint32_t count; 885 886 spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid); 887 count = spdk_bit_array_count_set(ctrlr->qpair_mask); 888 if (count == 0) { 889 ctrlr->in_destruct = true; 890 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr); 891 } 892 893 spdk_thread_send_msg(qpair_ctx->thread, _nvmf_transport_qpair_fini, qpair_ctx->qpair); 894 if (qpair_ctx->cb_fn) { 895 spdk_thread_send_msg(qpair_ctx->thread, qpair_ctx->cb_fn, qpair_ctx->ctx); 896 } 897 free(qpair_ctx); 898 } 899 900 void 901 spdk_nvmf_poll_group_remove(struct spdk_nvmf_qpair *qpair) 902 { 903 struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr; 904 struct spdk_nvmf_transport_poll_group *tgroup; 905 struct spdk_nvmf_request *req, *tmp; 906 struct spdk_nvmf_subsystem_poll_group *sgroup; 907 int rc; 908 909 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR); 910 911 /* Find the tgroup and remove the qpair from the tgroup */ 912 TAILQ_FOREACH(tgroup, &qpair->group->tgroups, link) { 913 if (tgroup->transport == qpair->transport) { 914 rc = nvmf_transport_poll_group_remove(tgroup, qpair); 915 if (rc && (rc != ENOTSUP)) { 916 SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n", 917 qpair, tgroup); 918 } 919 break; 920 } 921 } 922 923 if (ctrlr) { 924 sgroup = &qpair->group->sgroups[ctrlr->subsys->id]; 925 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 926 if (req->qpair == qpair) { 927 TAILQ_REMOVE(&sgroup->queued, req, link); 928 if (nvmf_transport_req_free(req)) { 929 SPDK_ERRLOG("Transport request free error!\n"); 930 } 931 } 932 } 933 } 934 935 TAILQ_REMOVE(&qpair->group->qpairs, qpair, link); 936 qpair->group = NULL; 937 } 938 939 static void 940 _nvmf_qpair_destroy(void *ctx, int status) 941 { 942 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 943 struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair; 944 struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr; 945 946 assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING); 947 qpair_ctx->qid = qpair->qid; 948 949 spdk_nvmf_poll_group_remove(qpair); 950 951 if (!ctrlr || !ctrlr->thread) { 952 nvmf_transport_qpair_fini(qpair); 953 if (qpair_ctx->cb_fn) { 954 spdk_thread_send_msg(qpair_ctx->thread, qpair_ctx->cb_fn, qpair_ctx->ctx); 955 } 956 free(qpair_ctx); 957 return; 958 } 959 960 qpair_ctx->ctrlr = ctrlr; 961 spdk_thread_send_msg(ctrlr->thread, _nvmf_ctrlr_free_from_qpair, qpair_ctx); 962 } 963 964 static void 965 _nvmf_qpair_disconnect_msg(void *ctx) 966 { 967 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 968 969 spdk_nvmf_qpair_disconnect(qpair_ctx->qpair, qpair_ctx->cb_fn, qpair_ctx->ctx); 970 free(ctx); 971 } 972 973 int 974 spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair, nvmf_qpair_disconnect_cb cb_fn, void *ctx) 975 { 976 struct nvmf_qpair_disconnect_ctx *qpair_ctx; 977 978 if (__atomic_test_and_set(&qpair->disconnect_started, __ATOMIC_RELAXED)) { 979 if (cb_fn) { 980 cb_fn(ctx); 981 } 982 return 0; 983 } 984 985 /* If we get a qpair in the uninitialized state, we can just destroy it immediately */ 986 if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) { 987 nvmf_transport_qpair_fini(qpair); 988 if (cb_fn) { 989 cb_fn(ctx); 990 } 991 return 0; 992 } 993 994 assert(qpair->group != NULL); 995 if (spdk_get_thread() != qpair->group->thread) { 996 /* clear the atomic so we can set it on the next call on the proper thread. */ 997 __atomic_clear(&qpair->disconnect_started, __ATOMIC_RELAXED); 998 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 999 if (!qpair_ctx) { 1000 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 1001 return -ENOMEM; 1002 } 1003 qpair_ctx->qpair = qpair; 1004 qpair_ctx->cb_fn = cb_fn; 1005 qpair_ctx->thread = qpair->group->thread; 1006 qpair_ctx->ctx = ctx; 1007 spdk_thread_send_msg(qpair->group->thread, _nvmf_qpair_disconnect_msg, qpair_ctx); 1008 return 0; 1009 } 1010 1011 assert(qpair->state == SPDK_NVMF_QPAIR_ACTIVE); 1012 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING); 1013 1014 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 1015 if (!qpair_ctx) { 1016 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 1017 return -ENOMEM; 1018 } 1019 1020 qpair_ctx->qpair = qpair; 1021 qpair_ctx->cb_fn = cb_fn; 1022 qpair_ctx->thread = qpair->group->thread; 1023 qpair_ctx->ctx = ctx; 1024 1025 /* Check for outstanding I/O */ 1026 if (!TAILQ_EMPTY(&qpair->outstanding)) { 1027 qpair->state_cb = _nvmf_qpair_destroy; 1028 qpair->state_cb_arg = qpair_ctx; 1029 nvmf_qpair_free_aer(qpair); 1030 return 0; 1031 } 1032 1033 _nvmf_qpair_destroy(qpair_ctx, 0); 1034 1035 return 0; 1036 } 1037 1038 int 1039 spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair, 1040 struct spdk_nvme_transport_id *trid) 1041 { 1042 return nvmf_transport_qpair_get_peer_trid(qpair, trid); 1043 } 1044 1045 int 1046 spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair, 1047 struct spdk_nvme_transport_id *trid) 1048 { 1049 return nvmf_transport_qpair_get_local_trid(qpair, trid); 1050 } 1051 1052 int 1053 spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair, 1054 struct spdk_nvme_transport_id *trid) 1055 { 1056 return nvmf_transport_qpair_get_listen_trid(qpair, trid); 1057 } 1058 1059 int 1060 nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group, 1061 struct spdk_nvmf_transport *transport) 1062 { 1063 struct spdk_nvmf_transport_poll_group *tgroup; 1064 1065 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 1066 if (tgroup->transport == transport) { 1067 /* Transport already in the poll group */ 1068 return 0; 1069 } 1070 } 1071 1072 tgroup = nvmf_transport_poll_group_create(transport); 1073 if (!tgroup) { 1074 SPDK_ERRLOG("Unable to create poll group for transport\n"); 1075 return -1; 1076 } 1077 1078 tgroup->group = group; 1079 TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); 1080 1081 return 0; 1082 } 1083 1084 static int 1085 poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1086 struct spdk_nvmf_subsystem *subsystem) 1087 { 1088 struct spdk_nvmf_subsystem_poll_group *sgroup; 1089 uint32_t new_num_ns, old_num_ns; 1090 uint32_t i, j; 1091 struct spdk_nvmf_ns *ns; 1092 struct spdk_nvmf_registrant *reg, *tmp; 1093 struct spdk_io_channel *ch; 1094 struct spdk_nvmf_subsystem_pg_ns_info *ns_info; 1095 struct spdk_nvmf_ctrlr *ctrlr; 1096 bool ns_changed; 1097 1098 /* Make sure our poll group has memory for this subsystem allocated */ 1099 if (subsystem->id >= group->num_sgroups) { 1100 return -ENOMEM; 1101 } 1102 1103 sgroup = &group->sgroups[subsystem->id]; 1104 1105 /* Make sure the array of namespace information is the correct size */ 1106 new_num_ns = subsystem->max_nsid; 1107 old_num_ns = sgroup->num_ns; 1108 1109 ns_changed = false; 1110 1111 if (old_num_ns == 0) { 1112 if (new_num_ns > 0) { 1113 /* First allocation */ 1114 sgroup->ns_info = calloc(new_num_ns, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1115 if (!sgroup->ns_info) { 1116 return -ENOMEM; 1117 } 1118 } 1119 } else if (new_num_ns > old_num_ns) { 1120 void *buf; 1121 1122 /* Make the array larger */ 1123 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1124 if (!buf) { 1125 return -ENOMEM; 1126 } 1127 1128 sgroup->ns_info = buf; 1129 1130 /* Null out the new namespace information slots */ 1131 for (i = old_num_ns; i < new_num_ns; i++) { 1132 memset(&sgroup->ns_info[i], 0, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1133 } 1134 } else if (new_num_ns < old_num_ns) { 1135 void *buf; 1136 1137 /* Free the extra I/O channels */ 1138 for (i = new_num_ns; i < old_num_ns; i++) { 1139 ns_info = &sgroup->ns_info[i]; 1140 1141 if (ns_info->channel) { 1142 spdk_put_io_channel(ns_info->channel); 1143 ns_info->channel = NULL; 1144 } 1145 } 1146 1147 /* Make the array smaller */ 1148 if (new_num_ns > 0) { 1149 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1150 if (!buf) { 1151 return -ENOMEM; 1152 } 1153 sgroup->ns_info = buf; 1154 } else { 1155 free(sgroup->ns_info); 1156 sgroup->ns_info = NULL; 1157 } 1158 } 1159 1160 sgroup->num_ns = new_num_ns; 1161 1162 /* Detect bdevs that were added or removed */ 1163 for (i = 0; i < sgroup->num_ns; i++) { 1164 ns = subsystem->ns[i]; 1165 ns_info = &sgroup->ns_info[i]; 1166 ch = ns_info->channel; 1167 1168 if (ns == NULL && ch == NULL) { 1169 /* Both NULL. Leave empty */ 1170 } else if (ns == NULL && ch != NULL) { 1171 /* There was a channel here, but the namespace is gone. */ 1172 ns_changed = true; 1173 spdk_put_io_channel(ch); 1174 ns_info->channel = NULL; 1175 } else if (ns != NULL && ch == NULL) { 1176 /* A namespace appeared but there is no channel yet */ 1177 ns_changed = true; 1178 ch = spdk_bdev_get_io_channel(ns->desc); 1179 if (ch == NULL) { 1180 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1181 return -ENOMEM; 1182 } 1183 ns_info->channel = ch; 1184 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) { 1185 /* A namespace was here before, but was replaced by a new one. */ 1186 ns_changed = true; 1187 spdk_put_io_channel(ns_info->channel); 1188 memset(ns_info, 0, sizeof(*ns_info)); 1189 1190 ch = spdk_bdev_get_io_channel(ns->desc); 1191 if (ch == NULL) { 1192 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1193 return -ENOMEM; 1194 } 1195 ns_info->channel = ch; 1196 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) { 1197 /* Namespace is still there but size has changed */ 1198 SPDK_DEBUGLOG(nvmf, "Namespace resized: subsystem_id %d," 1199 " nsid %u, pg %p, old %lu, new %lu\n", 1200 subsystem->id, 1201 ns->nsid, 1202 group, 1203 ns_info->num_blocks, 1204 spdk_bdev_get_num_blocks(ns->bdev)); 1205 ns_changed = true; 1206 } 1207 1208 if (ns == NULL) { 1209 memset(ns_info, 0, sizeof(*ns_info)); 1210 } else { 1211 ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev); 1212 ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev); 1213 ns_info->crkey = ns->crkey; 1214 ns_info->rtype = ns->rtype; 1215 if (ns->holder) { 1216 ns_info->holder_id = ns->holder->hostid; 1217 } 1218 1219 memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid)); 1220 j = 0; 1221 TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) { 1222 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) { 1223 SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS); 1224 return -EINVAL; 1225 } 1226 ns_info->reg_hostid[j++] = reg->hostid; 1227 } 1228 } 1229 } 1230 1231 if (ns_changed) { 1232 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) { 1233 if (ctrlr->admin_qpair->group == group) { 1234 nvmf_ctrlr_async_event_ns_notice(ctrlr); 1235 } 1236 } 1237 } 1238 1239 return 0; 1240 } 1241 1242 int 1243 nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1244 struct spdk_nvmf_subsystem *subsystem) 1245 { 1246 return poll_group_update_subsystem(group, subsystem); 1247 } 1248 1249 int 1250 nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group, 1251 struct spdk_nvmf_subsystem *subsystem, 1252 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1253 { 1254 int rc = 0; 1255 struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id]; 1256 1257 TAILQ_INIT(&sgroup->queued); 1258 1259 rc = poll_group_update_subsystem(group, subsystem); 1260 if (rc) { 1261 nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL); 1262 goto fini; 1263 } 1264 1265 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1266 fini: 1267 if (cb_fn) { 1268 cb_fn(cb_arg, rc); 1269 } 1270 1271 return rc; 1272 } 1273 1274 static void 1275 _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status) 1276 { 1277 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1278 struct spdk_nvmf_subsystem *subsystem; 1279 struct spdk_nvmf_poll_group *group; 1280 struct spdk_nvmf_subsystem_poll_group *sgroup; 1281 spdk_nvmf_poll_group_mod_done cpl_fn = NULL; 1282 void *cpl_ctx = NULL; 1283 uint32_t nsid; 1284 1285 group = qpair_ctx->group; 1286 subsystem = qpair_ctx->subsystem; 1287 cpl_fn = qpair_ctx->cpl_fn; 1288 cpl_ctx = qpair_ctx->cpl_ctx; 1289 sgroup = &group->sgroups[subsystem->id]; 1290 1291 if (status) { 1292 goto fini; 1293 } 1294 1295 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 1296 if (sgroup->ns_info[nsid].channel) { 1297 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 1298 sgroup->ns_info[nsid].channel = NULL; 1299 } 1300 } 1301 1302 sgroup->num_ns = 0; 1303 free(sgroup->ns_info); 1304 sgroup->ns_info = NULL; 1305 fini: 1306 free(qpair_ctx); 1307 if (cpl_fn) { 1308 cpl_fn(cpl_ctx, status); 1309 } 1310 } 1311 1312 static void 1313 _nvmf_subsystem_disconnect_next_qpair(void *ctx) 1314 { 1315 struct spdk_nvmf_qpair *qpair; 1316 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1317 struct spdk_nvmf_subsystem *subsystem; 1318 struct spdk_nvmf_poll_group *group; 1319 int rc = 0; 1320 1321 group = qpair_ctx->group; 1322 subsystem = qpair_ctx->subsystem; 1323 1324 TAILQ_FOREACH(qpair, &group->qpairs, link) { 1325 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) { 1326 break; 1327 } 1328 } 1329 1330 if (qpair) { 1331 rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_subsystem_disconnect_next_qpair, qpair_ctx); 1332 } 1333 1334 if (!qpair || rc != 0) { 1335 _nvmf_poll_group_remove_subsystem_cb(ctx, rc); 1336 } 1337 return; 1338 } 1339 1340 void 1341 nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group, 1342 struct spdk_nvmf_subsystem *subsystem, 1343 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1344 { 1345 struct spdk_nvmf_qpair *qpair; 1346 struct spdk_nvmf_subsystem_poll_group *sgroup; 1347 struct nvmf_qpair_disconnect_many_ctx *ctx; 1348 int rc = 0; 1349 1350 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 1351 1352 if (!ctx) { 1353 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n"); 1354 goto fini; 1355 } 1356 1357 ctx->group = group; 1358 ctx->subsystem = subsystem; 1359 ctx->cpl_fn = cb_fn; 1360 ctx->cpl_ctx = cb_arg; 1361 1362 sgroup = &group->sgroups[subsystem->id]; 1363 sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE; 1364 1365 TAILQ_FOREACH(qpair, &group->qpairs, link) { 1366 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) { 1367 break; 1368 } 1369 } 1370 1371 if (qpair) { 1372 rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_subsystem_disconnect_next_qpair, ctx); 1373 } else { 1374 /* call the callback immediately. It will handle any channel iteration */ 1375 _nvmf_poll_group_remove_subsystem_cb(ctx, 0); 1376 } 1377 1378 if (rc != 0 && rc != -EINPROGRESS) { 1379 free(ctx); 1380 goto fini; 1381 } 1382 1383 return; 1384 fini: 1385 if (cb_fn) { 1386 cb_fn(cb_arg, rc); 1387 } 1388 } 1389 1390 void 1391 nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group, 1392 struct spdk_nvmf_subsystem *subsystem, 1393 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1394 { 1395 struct spdk_nvmf_subsystem_poll_group *sgroup; 1396 int rc = 0; 1397 1398 if (subsystem->id >= group->num_sgroups) { 1399 rc = -1; 1400 goto fini; 1401 } 1402 1403 sgroup = &group->sgroups[subsystem->id]; 1404 if (sgroup == NULL) { 1405 rc = -1; 1406 goto fini; 1407 } 1408 1409 if (sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED) { 1410 goto fini; 1411 } 1412 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1413 1414 if (sgroup->io_outstanding > 0) { 1415 sgroup->cb_fn = cb_fn; 1416 sgroup->cb_arg = cb_arg; 1417 return; 1418 } 1419 1420 assert(sgroup->io_outstanding == 0); 1421 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED; 1422 fini: 1423 if (cb_fn) { 1424 cb_fn(cb_arg, rc); 1425 } 1426 } 1427 1428 void 1429 nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group, 1430 struct spdk_nvmf_subsystem *subsystem, 1431 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1432 { 1433 struct spdk_nvmf_request *req, *tmp; 1434 struct spdk_nvmf_subsystem_poll_group *sgroup; 1435 int rc = 0; 1436 1437 if (subsystem->id >= group->num_sgroups) { 1438 rc = -1; 1439 goto fini; 1440 } 1441 1442 sgroup = &group->sgroups[subsystem->id]; 1443 1444 if (sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE) { 1445 goto fini; 1446 } 1447 1448 rc = poll_group_update_subsystem(group, subsystem); 1449 if (rc) { 1450 goto fini; 1451 } 1452 1453 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1454 1455 /* Release all queued requests */ 1456 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 1457 TAILQ_REMOVE(&sgroup->queued, req, link); 1458 spdk_nvmf_request_exec(req); 1459 } 1460 fini: 1461 if (cb_fn) { 1462 cb_fn(cb_arg, rc); 1463 } 1464 } 1465 1466 1467 struct spdk_nvmf_poll_group * 1468 spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair) 1469 { 1470 struct spdk_nvmf_transport_poll_group *tgroup; 1471 1472 tgroup = nvmf_transport_get_optimal_poll_group(qpair->transport, qpair); 1473 1474 if (tgroup == NULL) { 1475 return NULL; 1476 } 1477 1478 return tgroup->group; 1479 } 1480 1481 int 1482 spdk_nvmf_poll_group_get_stat(struct spdk_nvmf_tgt *tgt, 1483 struct spdk_nvmf_poll_group_stat *stat) 1484 { 1485 struct spdk_io_channel *ch; 1486 struct spdk_nvmf_poll_group *group; 1487 1488 if (tgt == NULL || stat == NULL) { 1489 return -EINVAL; 1490 } 1491 1492 ch = spdk_get_io_channel(tgt); 1493 group = spdk_io_channel_get_ctx(ch); 1494 *stat = group->stat; 1495 spdk_put_io_channel(ch); 1496 return 0; 1497 } 1498