1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * NVMe admin command implementation. 4 * Copyright (c) 2015-2016 HGST, a Western Digital Company. 5 */ 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 #include <linux/module.h> 8 #include <linux/rculist.h> 9 #include <linux/part_stat.h> 10 11 #include <generated/utsrelease.h> 12 #include <linux/unaligned.h> 13 #include "nvmet.h" 14 15 u32 nvmet_get_log_page_len(struct nvme_command *cmd) 16 { 17 u32 len = le16_to_cpu(cmd->get_log_page.numdu); 18 19 len <<= 16; 20 len += le16_to_cpu(cmd->get_log_page.numdl); 21 /* NUMD is a 0's based value */ 22 len += 1; 23 len *= sizeof(u32); 24 25 return len; 26 } 27 28 static u32 nvmet_feat_data_len(struct nvmet_req *req, u32 cdw10) 29 { 30 switch (cdw10 & 0xff) { 31 case NVME_FEAT_HOST_ID: 32 return sizeof(req->sq->ctrl->hostid); 33 default: 34 return 0; 35 } 36 } 37 38 u64 nvmet_get_log_page_offset(struct nvme_command *cmd) 39 { 40 return le64_to_cpu(cmd->get_log_page.lpo); 41 } 42 43 static void nvmet_execute_get_log_page_noop(struct nvmet_req *req) 44 { 45 nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->transfer_len)); 46 } 47 48 static void nvmet_execute_get_log_page_error(struct nvmet_req *req) 49 { 50 struct nvmet_ctrl *ctrl = req->sq->ctrl; 51 unsigned long flags; 52 off_t offset = 0; 53 u64 slot; 54 u64 i; 55 56 spin_lock_irqsave(&ctrl->error_lock, flags); 57 slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS; 58 59 for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) { 60 if (nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot], 61 sizeof(struct nvme_error_slot))) 62 break; 63 64 if (slot == 0) 65 slot = NVMET_ERROR_LOG_SLOTS - 1; 66 else 67 slot--; 68 offset += sizeof(struct nvme_error_slot); 69 } 70 spin_unlock_irqrestore(&ctrl->error_lock, flags); 71 nvmet_req_complete(req, 0); 72 } 73 74 static void nvmet_execute_get_supported_log_pages(struct nvmet_req *req) 75 { 76 struct nvme_supported_log *logs; 77 u16 status; 78 79 logs = kzalloc(sizeof(*logs), GFP_KERNEL); 80 if (!logs) { 81 status = NVME_SC_INTERNAL; 82 goto out; 83 } 84 85 logs->lids[NVME_LOG_SUPPORTED] = cpu_to_le32(NVME_LIDS_LSUPP); 86 logs->lids[NVME_LOG_ERROR] = cpu_to_le32(NVME_LIDS_LSUPP); 87 logs->lids[NVME_LOG_SMART] = cpu_to_le32(NVME_LIDS_LSUPP); 88 logs->lids[NVME_LOG_FW_SLOT] = cpu_to_le32(NVME_LIDS_LSUPP); 89 logs->lids[NVME_LOG_CHANGED_NS] = cpu_to_le32(NVME_LIDS_LSUPP); 90 logs->lids[NVME_LOG_CMD_EFFECTS] = cpu_to_le32(NVME_LIDS_LSUPP); 91 logs->lids[NVME_LOG_ENDURANCE_GROUP] = cpu_to_le32(NVME_LIDS_LSUPP); 92 logs->lids[NVME_LOG_ANA] = cpu_to_le32(NVME_LIDS_LSUPP); 93 logs->lids[NVME_LOG_FEATURES] = cpu_to_le32(NVME_LIDS_LSUPP); 94 logs->lids[NVME_LOG_RMI] = cpu_to_le32(NVME_LIDS_LSUPP); 95 logs->lids[NVME_LOG_RESERVATION] = cpu_to_le32(NVME_LIDS_LSUPP); 96 97 status = nvmet_copy_to_sgl(req, 0, logs, sizeof(*logs)); 98 kfree(logs); 99 out: 100 nvmet_req_complete(req, status); 101 } 102 103 static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, 104 struct nvme_smart_log *slog) 105 { 106 u64 host_reads, host_writes, data_units_read, data_units_written; 107 u16 status; 108 109 status = nvmet_req_find_ns(req); 110 if (status) 111 return status; 112 113 /* we don't have the right data for file backed ns */ 114 if (!req->ns->bdev) 115 return NVME_SC_SUCCESS; 116 117 host_reads = part_stat_read(req->ns->bdev, ios[READ]); 118 data_units_read = 119 DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[READ]), 1000); 120 host_writes = part_stat_read(req->ns->bdev, ios[WRITE]); 121 data_units_written = 122 DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[WRITE]), 1000); 123 124 put_unaligned_le64(host_reads, &slog->host_reads[0]); 125 put_unaligned_le64(data_units_read, &slog->data_units_read[0]); 126 put_unaligned_le64(host_writes, &slog->host_writes[0]); 127 put_unaligned_le64(data_units_written, &slog->data_units_written[0]); 128 129 return NVME_SC_SUCCESS; 130 } 131 132 static u16 nvmet_get_smart_log_all(struct nvmet_req *req, 133 struct nvme_smart_log *slog) 134 { 135 u64 host_reads = 0, host_writes = 0; 136 u64 data_units_read = 0, data_units_written = 0; 137 struct nvmet_ns *ns; 138 struct nvmet_ctrl *ctrl; 139 unsigned long idx; 140 141 ctrl = req->sq->ctrl; 142 nvmet_for_each_enabled_ns(&ctrl->subsys->namespaces, idx, ns) { 143 /* we don't have the right data for file backed ns */ 144 if (!ns->bdev) 145 continue; 146 host_reads += part_stat_read(ns->bdev, ios[READ]); 147 data_units_read += DIV_ROUND_UP( 148 part_stat_read(ns->bdev, sectors[READ]), 1000); 149 host_writes += part_stat_read(ns->bdev, ios[WRITE]); 150 data_units_written += DIV_ROUND_UP( 151 part_stat_read(ns->bdev, sectors[WRITE]), 1000); 152 } 153 154 put_unaligned_le64(host_reads, &slog->host_reads[0]); 155 put_unaligned_le64(data_units_read, &slog->data_units_read[0]); 156 put_unaligned_le64(host_writes, &slog->host_writes[0]); 157 put_unaligned_le64(data_units_written, &slog->data_units_written[0]); 158 159 return NVME_SC_SUCCESS; 160 } 161 162 static void nvmet_execute_get_log_page_rmi(struct nvmet_req *req) 163 { 164 struct nvme_rotational_media_log *log; 165 struct gendisk *disk; 166 u16 status; 167 168 req->cmd->common.nsid = cpu_to_le32(le16_to_cpu( 169 req->cmd->get_log_page.lsi)); 170 status = nvmet_req_find_ns(req); 171 if (status) 172 goto out; 173 174 if (!req->ns->bdev || bdev_nonrot(req->ns->bdev)) { 175 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR; 176 goto out; 177 } 178 179 if (req->transfer_len != sizeof(*log)) { 180 status = NVME_SC_SGL_INVALID_DATA | NVME_STATUS_DNR; 181 goto out; 182 } 183 184 log = kzalloc(sizeof(*log), GFP_KERNEL); 185 if (!log) 186 goto out; 187 188 log->endgid = req->cmd->get_log_page.lsi; 189 disk = req->ns->bdev->bd_disk; 190 if (disk && disk->ia_ranges) 191 log->numa = cpu_to_le16(disk->ia_ranges->nr_ia_ranges); 192 else 193 log->numa = cpu_to_le16(1); 194 195 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 196 kfree(log); 197 out: 198 nvmet_req_complete(req, status); 199 } 200 201 static void nvmet_execute_get_log_page_smart(struct nvmet_req *req) 202 { 203 struct nvme_smart_log *log; 204 u16 status = NVME_SC_INTERNAL; 205 unsigned long flags; 206 207 if (req->transfer_len != sizeof(*log)) 208 goto out; 209 210 log = kzalloc(sizeof(*log), GFP_KERNEL); 211 if (!log) 212 goto out; 213 214 if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL)) 215 status = nvmet_get_smart_log_all(req, log); 216 else 217 status = nvmet_get_smart_log_nsid(req, log); 218 if (status) 219 goto out_free_log; 220 221 spin_lock_irqsave(&req->sq->ctrl->error_lock, flags); 222 put_unaligned_le64(req->sq->ctrl->err_counter, 223 &log->num_err_log_entries); 224 spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags); 225 226 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 227 out_free_log: 228 kfree(log); 229 out: 230 nvmet_req_complete(req, status); 231 } 232 233 static void nvmet_get_cmd_effects_nvm(struct nvme_effects_log *log) 234 { 235 log->acs[nvme_admin_get_log_page] = 236 log->acs[nvme_admin_identify] = 237 log->acs[nvme_admin_abort_cmd] = 238 log->acs[nvme_admin_set_features] = 239 log->acs[nvme_admin_get_features] = 240 log->acs[nvme_admin_async_event] = 241 log->acs[nvme_admin_keep_alive] = 242 cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); 243 244 log->iocs[nvme_cmd_read] = 245 log->iocs[nvme_cmd_flush] = 246 log->iocs[nvme_cmd_dsm] = 247 log->iocs[nvme_cmd_resv_acquire] = 248 log->iocs[nvme_cmd_resv_register] = 249 log->iocs[nvme_cmd_resv_release] = 250 log->iocs[nvme_cmd_resv_report] = 251 cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); 252 log->iocs[nvme_cmd_write] = 253 log->iocs[nvme_cmd_write_zeroes] = 254 cpu_to_le32(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC); 255 } 256 257 static void nvmet_get_cmd_effects_zns(struct nvme_effects_log *log) 258 { 259 log->iocs[nvme_cmd_zone_append] = 260 log->iocs[nvme_cmd_zone_mgmt_send] = 261 cpu_to_le32(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC); 262 log->iocs[nvme_cmd_zone_mgmt_recv] = 263 cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); 264 } 265 266 static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) 267 { 268 struct nvme_effects_log *log; 269 u16 status = NVME_SC_SUCCESS; 270 271 log = kzalloc(sizeof(*log), GFP_KERNEL); 272 if (!log) { 273 status = NVME_SC_INTERNAL; 274 goto out; 275 } 276 277 switch (req->cmd->get_log_page.csi) { 278 case NVME_CSI_NVM: 279 nvmet_get_cmd_effects_nvm(log); 280 break; 281 case NVME_CSI_ZNS: 282 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { 283 status = NVME_SC_INVALID_IO_CMD_SET; 284 goto free; 285 } 286 nvmet_get_cmd_effects_nvm(log); 287 nvmet_get_cmd_effects_zns(log); 288 break; 289 default: 290 status = NVME_SC_INVALID_LOG_PAGE; 291 goto free; 292 } 293 294 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 295 free: 296 kfree(log); 297 out: 298 nvmet_req_complete(req, status); 299 } 300 301 static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req) 302 { 303 struct nvmet_ctrl *ctrl = req->sq->ctrl; 304 u16 status = NVME_SC_INTERNAL; 305 size_t len; 306 307 if (req->transfer_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32)) 308 goto out; 309 310 mutex_lock(&ctrl->lock); 311 if (ctrl->nr_changed_ns == U32_MAX) 312 len = sizeof(__le32); 313 else 314 len = ctrl->nr_changed_ns * sizeof(__le32); 315 status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len); 316 if (!status) 317 status = nvmet_zero_sgl(req, len, req->transfer_len - len); 318 ctrl->nr_changed_ns = 0; 319 nvmet_clear_aen_bit(req, NVME_AEN_BIT_NS_ATTR); 320 mutex_unlock(&ctrl->lock); 321 out: 322 nvmet_req_complete(req, status); 323 } 324 325 static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid, 326 struct nvme_ana_group_desc *desc) 327 { 328 struct nvmet_ctrl *ctrl = req->sq->ctrl; 329 struct nvmet_ns *ns; 330 unsigned long idx; 331 u32 count = 0; 332 333 if (!(req->cmd->get_log_page.lsp & NVME_ANA_LOG_RGO)) { 334 nvmet_for_each_enabled_ns(&ctrl->subsys->namespaces, idx, ns) { 335 if (ns->anagrpid == grpid) 336 desc->nsids[count++] = cpu_to_le32(ns->nsid); 337 } 338 } 339 340 desc->grpid = cpu_to_le32(grpid); 341 desc->nnsids = cpu_to_le32(count); 342 desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt); 343 desc->state = req->port->ana_state[grpid]; 344 memset(desc->rsvd17, 0, sizeof(desc->rsvd17)); 345 return struct_size(desc, nsids, count); 346 } 347 348 static void nvmet_execute_get_log_page_endgrp(struct nvmet_req *req) 349 { 350 u64 host_reads, host_writes, data_units_read, data_units_written; 351 struct nvme_endurance_group_log *log; 352 u16 status; 353 354 /* 355 * The target driver emulates each endurance group as its own 356 * namespace, reusing the nsid as the endurance group identifier. 357 */ 358 req->cmd->common.nsid = cpu_to_le32(le16_to_cpu( 359 req->cmd->get_log_page.lsi)); 360 status = nvmet_req_find_ns(req); 361 if (status) 362 goto out; 363 364 log = kzalloc(sizeof(*log), GFP_KERNEL); 365 if (!log) { 366 status = NVME_SC_INTERNAL; 367 goto out; 368 } 369 370 if (!req->ns->bdev) 371 goto copy; 372 373 host_reads = part_stat_read(req->ns->bdev, ios[READ]); 374 data_units_read = 375 DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[READ]), 1000); 376 host_writes = part_stat_read(req->ns->bdev, ios[WRITE]); 377 data_units_written = 378 DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[WRITE]), 1000); 379 380 put_unaligned_le64(host_reads, &log->hrc[0]); 381 put_unaligned_le64(data_units_read, &log->dur[0]); 382 put_unaligned_le64(host_writes, &log->hwc[0]); 383 put_unaligned_le64(data_units_written, &log->duw[0]); 384 copy: 385 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 386 kfree(log); 387 out: 388 nvmet_req_complete(req, status); 389 } 390 391 static void nvmet_execute_get_log_page_ana(struct nvmet_req *req) 392 { 393 struct nvme_ana_rsp_hdr hdr = { 0, }; 394 struct nvme_ana_group_desc *desc; 395 size_t offset = sizeof(struct nvme_ana_rsp_hdr); /* start beyond hdr */ 396 size_t len; 397 u32 grpid; 398 u16 ngrps = 0; 399 u16 status; 400 401 status = NVME_SC_INTERNAL; 402 desc = kmalloc(struct_size(desc, nsids, NVMET_MAX_NAMESPACES), 403 GFP_KERNEL); 404 if (!desc) 405 goto out; 406 407 down_read(&nvmet_ana_sem); 408 for (grpid = 1; grpid <= NVMET_MAX_ANAGRPS; grpid++) { 409 if (!nvmet_ana_group_enabled[grpid]) 410 continue; 411 len = nvmet_format_ana_group(req, grpid, desc); 412 status = nvmet_copy_to_sgl(req, offset, desc, len); 413 if (status) 414 break; 415 offset += len; 416 ngrps++; 417 } 418 for ( ; grpid <= NVMET_MAX_ANAGRPS; grpid++) { 419 if (nvmet_ana_group_enabled[grpid]) 420 ngrps++; 421 } 422 423 hdr.chgcnt = cpu_to_le64(nvmet_ana_chgcnt); 424 hdr.ngrps = cpu_to_le16(ngrps); 425 nvmet_clear_aen_bit(req, NVME_AEN_BIT_ANA_CHANGE); 426 up_read(&nvmet_ana_sem); 427 428 kfree(desc); 429 430 /* copy the header last once we know the number of groups */ 431 status = nvmet_copy_to_sgl(req, 0, &hdr, sizeof(hdr)); 432 out: 433 nvmet_req_complete(req, status); 434 } 435 436 static void nvmet_execute_get_log_page_features(struct nvmet_req *req) 437 { 438 struct nvme_supported_features_log *features; 439 u16 status; 440 441 features = kzalloc(sizeof(*features), GFP_KERNEL); 442 if (!features) { 443 status = NVME_SC_INTERNAL; 444 goto out; 445 } 446 447 features->fis[NVME_FEAT_NUM_QUEUES] = 448 cpu_to_le32(NVME_FIS_FSUPP | NVME_FIS_CSCPE); 449 features->fis[NVME_FEAT_KATO] = 450 cpu_to_le32(NVME_FIS_FSUPP | NVME_FIS_CSCPE); 451 features->fis[NVME_FEAT_ASYNC_EVENT] = 452 cpu_to_le32(NVME_FIS_FSUPP | NVME_FIS_CSCPE); 453 features->fis[NVME_FEAT_HOST_ID] = 454 cpu_to_le32(NVME_FIS_FSUPP | NVME_FIS_CSCPE); 455 features->fis[NVME_FEAT_WRITE_PROTECT] = 456 cpu_to_le32(NVME_FIS_FSUPP | NVME_FIS_NSCPE); 457 features->fis[NVME_FEAT_RESV_MASK] = 458 cpu_to_le32(NVME_FIS_FSUPP | NVME_FIS_NSCPE); 459 460 status = nvmet_copy_to_sgl(req, 0, features, sizeof(*features)); 461 kfree(features); 462 out: 463 nvmet_req_complete(req, status); 464 } 465 466 static void nvmet_execute_get_log_page(struct nvmet_req *req) 467 { 468 if (!nvmet_check_transfer_len(req, nvmet_get_log_page_len(req->cmd))) 469 return; 470 471 switch (req->cmd->get_log_page.lid) { 472 case NVME_LOG_SUPPORTED: 473 return nvmet_execute_get_supported_log_pages(req); 474 case NVME_LOG_ERROR: 475 return nvmet_execute_get_log_page_error(req); 476 case NVME_LOG_SMART: 477 return nvmet_execute_get_log_page_smart(req); 478 case NVME_LOG_FW_SLOT: 479 /* 480 * We only support a single firmware slot which always is 481 * active, so we can zero out the whole firmware slot log and 482 * still claim to fully implement this mandatory log page. 483 */ 484 return nvmet_execute_get_log_page_noop(req); 485 case NVME_LOG_CHANGED_NS: 486 return nvmet_execute_get_log_changed_ns(req); 487 case NVME_LOG_CMD_EFFECTS: 488 return nvmet_execute_get_log_cmd_effects_ns(req); 489 case NVME_LOG_ENDURANCE_GROUP: 490 return nvmet_execute_get_log_page_endgrp(req); 491 case NVME_LOG_ANA: 492 return nvmet_execute_get_log_page_ana(req); 493 case NVME_LOG_FEATURES: 494 return nvmet_execute_get_log_page_features(req); 495 case NVME_LOG_RMI: 496 return nvmet_execute_get_log_page_rmi(req); 497 case NVME_LOG_RESERVATION: 498 return nvmet_execute_get_log_page_resv(req); 499 } 500 pr_debug("unhandled lid %d on qid %d\n", 501 req->cmd->get_log_page.lid, req->sq->qid); 502 req->error_loc = offsetof(struct nvme_get_log_page_command, lid); 503 nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_STATUS_DNR); 504 } 505 506 static void nvmet_execute_identify_ctrl(struct nvmet_req *req) 507 { 508 struct nvmet_ctrl *ctrl = req->sq->ctrl; 509 struct nvmet_subsys *subsys = ctrl->subsys; 510 struct nvme_id_ctrl *id; 511 u32 cmd_capsule_size; 512 u16 status = 0; 513 514 if (!subsys->subsys_discovered) { 515 mutex_lock(&subsys->lock); 516 subsys->subsys_discovered = true; 517 mutex_unlock(&subsys->lock); 518 } 519 520 id = kzalloc(sizeof(*id), GFP_KERNEL); 521 if (!id) { 522 status = NVME_SC_INTERNAL; 523 goto out; 524 } 525 526 /* XXX: figure out how to assign real vendors IDs. */ 527 id->vid = 0; 528 id->ssvid = 0; 529 530 memcpy(id->sn, ctrl->subsys->serial, NVMET_SN_MAX_SIZE); 531 memcpy_and_pad(id->mn, sizeof(id->mn), subsys->model_number, 532 strlen(subsys->model_number), ' '); 533 memcpy_and_pad(id->fr, sizeof(id->fr), 534 subsys->firmware_rev, strlen(subsys->firmware_rev), ' '); 535 536 put_unaligned_le24(subsys->ieee_oui, id->ieee); 537 538 id->rab = 6; 539 540 if (nvmet_is_disc_subsys(ctrl->subsys)) 541 id->cntrltype = NVME_CTRL_DISC; 542 else 543 id->cntrltype = NVME_CTRL_IO; 544 545 /* we support multiple ports, multiples hosts and ANA: */ 546 id->cmic = NVME_CTRL_CMIC_MULTI_PORT | NVME_CTRL_CMIC_MULTI_CTRL | 547 NVME_CTRL_CMIC_ANA; 548 549 /* Limit MDTS according to transport capability */ 550 if (ctrl->ops->get_mdts) 551 id->mdts = ctrl->ops->get_mdts(ctrl); 552 else 553 id->mdts = 0; 554 555 id->cntlid = cpu_to_le16(ctrl->cntlid); 556 id->ver = cpu_to_le32(ctrl->subsys->ver); 557 558 /* XXX: figure out what to do about RTD3R/RTD3 */ 559 id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL); 560 id->ctratt = cpu_to_le32(NVME_CTRL_ATTR_HID_128_BIT | 561 NVME_CTRL_ATTR_TBKAS); 562 563 id->oacs = 0; 564 565 /* 566 * We don't really have a practical limit on the number of abort 567 * comands. But we don't do anything useful for abort either, so 568 * no point in allowing more abort commands than the spec requires. 569 */ 570 id->acl = 3; 571 572 id->aerl = NVMET_ASYNC_EVENTS - 1; 573 574 /* first slot is read-only, only one slot supported */ 575 id->frmw = (1 << 0) | (1 << 1); 576 id->lpa = (1 << 0) | (1 << 1) | (1 << 2); 577 id->elpe = NVMET_ERROR_LOG_SLOTS - 1; 578 id->npss = 0; 579 580 /* We support keep-alive timeout in granularity of seconds */ 581 id->kas = cpu_to_le16(NVMET_KAS); 582 583 id->sqes = (0x6 << 4) | 0x6; 584 id->cqes = (0x4 << 4) | 0x4; 585 586 /* no enforcement soft-limit for maxcmd - pick arbitrary high value */ 587 id->maxcmd = cpu_to_le16(NVMET_MAX_CMD(ctrl)); 588 589 id->nn = cpu_to_le32(NVMET_MAX_NAMESPACES); 590 id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES); 591 id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | 592 NVME_CTRL_ONCS_WRITE_ZEROES | 593 NVME_CTRL_ONCS_RESERVATIONS); 594 595 /* XXX: don't report vwc if the underlying device is write through */ 596 id->vwc = NVME_CTRL_VWC_PRESENT; 597 598 /* 599 * We can't support atomic writes bigger than a LBA without support 600 * from the backend device. 601 */ 602 id->awun = 0; 603 id->awupf = 0; 604 605 /* we always support SGLs */ 606 id->sgls = cpu_to_le32(NVME_CTRL_SGLS_BYTE_ALIGNED); 607 if (ctrl->ops->flags & NVMF_KEYED_SGLS) 608 id->sgls |= cpu_to_le32(NVME_CTRL_SGLS_KSDBDS); 609 if (req->port->inline_data_size) 610 id->sgls |= cpu_to_le32(NVME_CTRL_SGLS_SAOS); 611 612 strscpy(id->subnqn, ctrl->subsys->subsysnqn, sizeof(id->subnqn)); 613 614 /* 615 * Max command capsule size is sqe + in-capsule data size. 616 * Disable in-capsule data for Metadata capable controllers. 617 */ 618 cmd_capsule_size = sizeof(struct nvme_command); 619 if (!ctrl->pi_support) 620 cmd_capsule_size += req->port->inline_data_size; 621 id->ioccsz = cpu_to_le32(cmd_capsule_size / 16); 622 623 /* Max response capsule size is cqe */ 624 id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16); 625 626 id->msdbd = ctrl->ops->msdbd; 627 628 /* 629 * Endurance group identifier is 16 bits, so we can't let namespaces 630 * overflow that since we reuse the nsid 631 */ 632 BUILD_BUG_ON(NVMET_MAX_NAMESPACES > USHRT_MAX); 633 id->endgidmax = cpu_to_le16(NVMET_MAX_NAMESPACES); 634 635 id->anacap = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4); 636 id->anatt = 10; /* random value */ 637 id->anagrpmax = cpu_to_le32(NVMET_MAX_ANAGRPS); 638 id->nanagrpid = cpu_to_le32(NVMET_MAX_ANAGRPS); 639 640 /* 641 * Meh, we don't really support any power state. Fake up the same 642 * values that qemu does. 643 */ 644 id->psd[0].max_power = cpu_to_le16(0x9c4); 645 id->psd[0].entry_lat = cpu_to_le32(0x10); 646 id->psd[0].exit_lat = cpu_to_le32(0x4); 647 648 id->nwpc = 1 << 0; /* write protect and no write protect */ 649 650 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 651 652 kfree(id); 653 out: 654 nvmet_req_complete(req, status); 655 } 656 657 static void nvmet_execute_identify_ns(struct nvmet_req *req) 658 { 659 struct nvme_id_ns *id; 660 u16 status; 661 662 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) { 663 req->error_loc = offsetof(struct nvme_identify, nsid); 664 status = NVME_SC_INVALID_NS | NVME_STATUS_DNR; 665 goto out; 666 } 667 668 id = kzalloc(sizeof(*id), GFP_KERNEL); 669 if (!id) { 670 status = NVME_SC_INTERNAL; 671 goto out; 672 } 673 674 /* return an all zeroed buffer if we can't find an active namespace */ 675 status = nvmet_req_find_ns(req); 676 if (status) { 677 status = 0; 678 goto done; 679 } 680 681 if (nvmet_ns_revalidate(req->ns)) { 682 mutex_lock(&req->ns->subsys->lock); 683 nvmet_ns_changed(req->ns->subsys, req->ns->nsid); 684 mutex_unlock(&req->ns->subsys->lock); 685 } 686 687 /* 688 * nuse = ncap = nsze isn't always true, but we have no way to find 689 * that out from the underlying device. 690 */ 691 id->ncap = id->nsze = 692 cpu_to_le64(req->ns->size >> req->ns->blksize_shift); 693 switch (req->port->ana_state[req->ns->anagrpid]) { 694 case NVME_ANA_INACCESSIBLE: 695 case NVME_ANA_PERSISTENT_LOSS: 696 break; 697 default: 698 id->nuse = id->nsze; 699 break; 700 } 701 702 if (req->ns->bdev) 703 nvmet_bdev_set_limits(req->ns->bdev, id); 704 705 /* 706 * We just provide a single LBA format that matches what the 707 * underlying device reports. 708 */ 709 id->nlbaf = 0; 710 id->flbas = 0; 711 712 /* 713 * Our namespace might always be shared. Not just with other 714 * controllers, but also with any other user of the block device. 715 */ 716 id->nmic = NVME_NS_NMIC_SHARED; 717 id->anagrpid = cpu_to_le32(req->ns->anagrpid); 718 719 if (req->ns->pr.enable) 720 id->rescap = NVME_PR_SUPPORT_WRITE_EXCLUSIVE | 721 NVME_PR_SUPPORT_EXCLUSIVE_ACCESS | 722 NVME_PR_SUPPORT_WRITE_EXCLUSIVE_REG_ONLY | 723 NVME_PR_SUPPORT_EXCLUSIVE_ACCESS_REG_ONLY | 724 NVME_PR_SUPPORT_WRITE_EXCLUSIVE_ALL_REGS | 725 NVME_PR_SUPPORT_EXCLUSIVE_ACCESS_ALL_REGS | 726 NVME_PR_SUPPORT_IEKEY_VER_1_3_DEF; 727 728 /* 729 * Since we don't know any better, every namespace is its own endurance 730 * group. 731 */ 732 id->endgid = cpu_to_le16(req->ns->nsid); 733 734 memcpy(&id->nguid, &req->ns->nguid, sizeof(id->nguid)); 735 736 id->lbaf[0].ds = req->ns->blksize_shift; 737 738 if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(req->ns)) { 739 id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST | 740 NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 | 741 NVME_NS_DPC_PI_TYPE3; 742 id->mc = NVME_MC_EXTENDED_LBA; 743 id->dps = req->ns->pi_type; 744 id->flbas = NVME_NS_FLBAS_META_EXT; 745 id->lbaf[0].ms = cpu_to_le16(req->ns->metadata_size); 746 } 747 748 if (req->ns->readonly) 749 id->nsattr |= NVME_NS_ATTR_RO; 750 done: 751 if (!status) 752 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 753 754 kfree(id); 755 out: 756 nvmet_req_complete(req, status); 757 } 758 759 static void nvmet_execute_identify_endgrp_list(struct nvmet_req *req) 760 { 761 u16 min_endgid = le16_to_cpu(req->cmd->identify.cnssid); 762 static const int buf_size = NVME_IDENTIFY_DATA_SIZE; 763 struct nvmet_ctrl *ctrl = req->sq->ctrl; 764 struct nvmet_ns *ns; 765 unsigned long idx; 766 __le16 *list; 767 u16 status; 768 int i = 1; 769 770 list = kzalloc(buf_size, GFP_KERNEL); 771 if (!list) { 772 status = NVME_SC_INTERNAL; 773 goto out; 774 } 775 776 nvmet_for_each_enabled_ns(&ctrl->subsys->namespaces, idx, ns) { 777 if (ns->nsid <= min_endgid) 778 continue; 779 780 list[i++] = cpu_to_le16(ns->nsid); 781 if (i == buf_size / sizeof(__le16)) 782 break; 783 } 784 785 list[0] = cpu_to_le16(i - 1); 786 status = nvmet_copy_to_sgl(req, 0, list, buf_size); 787 kfree(list); 788 out: 789 nvmet_req_complete(req, status); 790 } 791 792 static void nvmet_execute_identify_nslist(struct nvmet_req *req, bool match_css) 793 { 794 static const int buf_size = NVME_IDENTIFY_DATA_SIZE; 795 struct nvmet_ctrl *ctrl = req->sq->ctrl; 796 struct nvmet_ns *ns; 797 unsigned long idx; 798 u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid); 799 __le32 *list; 800 u16 status = 0; 801 int i = 0; 802 803 /* 804 * NSID values 0xFFFFFFFE and NVME_NSID_ALL are invalid 805 * See NVMe Base Specification, Active Namespace ID list (CNS 02h). 806 */ 807 if (min_nsid == 0xFFFFFFFE || min_nsid == NVME_NSID_ALL) { 808 req->error_loc = offsetof(struct nvme_identify, nsid); 809 status = NVME_SC_INVALID_NS | NVME_STATUS_DNR; 810 goto out; 811 } 812 813 list = kzalloc(buf_size, GFP_KERNEL); 814 if (!list) { 815 status = NVME_SC_INTERNAL; 816 goto out; 817 } 818 819 nvmet_for_each_enabled_ns(&ctrl->subsys->namespaces, idx, ns) { 820 if (ns->nsid <= min_nsid) 821 continue; 822 if (match_css && req->ns->csi != req->cmd->identify.csi) 823 continue; 824 list[i++] = cpu_to_le32(ns->nsid); 825 if (i == buf_size / sizeof(__le32)) 826 break; 827 } 828 829 status = nvmet_copy_to_sgl(req, 0, list, buf_size); 830 831 kfree(list); 832 out: 833 nvmet_req_complete(req, status); 834 } 835 836 static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len, 837 void *id, off_t *off) 838 { 839 struct nvme_ns_id_desc desc = { 840 .nidt = type, 841 .nidl = len, 842 }; 843 u16 status; 844 845 status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc)); 846 if (status) 847 return status; 848 *off += sizeof(desc); 849 850 status = nvmet_copy_to_sgl(req, *off, id, len); 851 if (status) 852 return status; 853 *off += len; 854 855 return 0; 856 } 857 858 static void nvmet_execute_identify_desclist(struct nvmet_req *req) 859 { 860 off_t off = 0; 861 u16 status; 862 863 status = nvmet_req_find_ns(req); 864 if (status) 865 goto out; 866 867 if (memchr_inv(&req->ns->uuid, 0, sizeof(req->ns->uuid))) { 868 status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID, 869 NVME_NIDT_UUID_LEN, 870 &req->ns->uuid, &off); 871 if (status) 872 goto out; 873 } 874 if (memchr_inv(req->ns->nguid, 0, sizeof(req->ns->nguid))) { 875 status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID, 876 NVME_NIDT_NGUID_LEN, 877 &req->ns->nguid, &off); 878 if (status) 879 goto out; 880 } 881 882 status = nvmet_copy_ns_identifier(req, NVME_NIDT_CSI, 883 NVME_NIDT_CSI_LEN, 884 &req->ns->csi, &off); 885 if (status) 886 goto out; 887 888 if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off, 889 off) != NVME_IDENTIFY_DATA_SIZE - off) 890 status = NVME_SC_INTERNAL | NVME_STATUS_DNR; 891 892 out: 893 nvmet_req_complete(req, status); 894 } 895 896 static void nvmet_execute_identify_ctrl_nvm(struct nvmet_req *req) 897 { 898 /* Not supported: return zeroes */ 899 nvmet_req_complete(req, 900 nvmet_zero_sgl(req, 0, sizeof(struct nvme_id_ctrl_nvm))); 901 } 902 903 static void nvme_execute_identify_ns_nvm(struct nvmet_req *req) 904 { 905 u16 status; 906 struct nvme_id_ns_nvm *id; 907 908 status = nvmet_req_find_ns(req); 909 if (status) 910 goto out; 911 912 id = kzalloc(sizeof(*id), GFP_KERNEL); 913 if (!id) { 914 status = NVME_SC_INTERNAL; 915 goto out; 916 } 917 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 918 out: 919 nvmet_req_complete(req, status); 920 } 921 922 static void nvmet_execute_id_cs_indep(struct nvmet_req *req) 923 { 924 struct nvme_id_ns_cs_indep *id; 925 u16 status; 926 927 status = nvmet_req_find_ns(req); 928 if (status) 929 goto out; 930 931 id = kzalloc(sizeof(*id), GFP_KERNEL); 932 if (!id) { 933 status = NVME_SC_INTERNAL; 934 goto out; 935 } 936 937 id->nstat = NVME_NSTAT_NRDY; 938 id->anagrpid = cpu_to_le32(req->ns->anagrpid); 939 id->nmic = NVME_NS_NMIC_SHARED; 940 if (req->ns->readonly) 941 id->nsattr |= NVME_NS_ATTR_RO; 942 if (req->ns->bdev && !bdev_nonrot(req->ns->bdev)) 943 id->nsfeat |= NVME_NS_ROTATIONAL; 944 /* 945 * We need flush command to flush the file's metadata, 946 * so report supporting vwc if backend is file, even 947 * though buffered_io is disable. 948 */ 949 if (req->ns->bdev && !bdev_write_cache(req->ns->bdev)) 950 id->nsfeat |= NVME_NS_VWC_NOT_PRESENT; 951 952 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 953 kfree(id); 954 out: 955 nvmet_req_complete(req, status); 956 } 957 958 static void nvmet_execute_identify(struct nvmet_req *req) 959 { 960 if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE)) 961 return; 962 963 switch (req->cmd->identify.cns) { 964 case NVME_ID_CNS_NS: 965 nvmet_execute_identify_ns(req); 966 return; 967 case NVME_ID_CNS_CTRL: 968 nvmet_execute_identify_ctrl(req); 969 return; 970 case NVME_ID_CNS_NS_ACTIVE_LIST: 971 nvmet_execute_identify_nslist(req, false); 972 return; 973 case NVME_ID_CNS_NS_DESC_LIST: 974 nvmet_execute_identify_desclist(req); 975 return; 976 case NVME_ID_CNS_CS_NS: 977 switch (req->cmd->identify.csi) { 978 case NVME_CSI_NVM: 979 nvme_execute_identify_ns_nvm(req); 980 return; 981 case NVME_CSI_ZNS: 982 if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { 983 nvmet_execute_identify_ns_zns(req); 984 return; 985 } 986 break; 987 } 988 break; 989 case NVME_ID_CNS_CS_CTRL: 990 switch (req->cmd->identify.csi) { 991 case NVME_CSI_NVM: 992 nvmet_execute_identify_ctrl_nvm(req); 993 return; 994 case NVME_CSI_ZNS: 995 if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { 996 nvmet_execute_identify_ctrl_zns(req); 997 return; 998 } 999 break; 1000 } 1001 break; 1002 case NVME_ID_CNS_NS_ACTIVE_LIST_CS: 1003 nvmet_execute_identify_nslist(req, true); 1004 return; 1005 case NVME_ID_CNS_NS_CS_INDEP: 1006 nvmet_execute_id_cs_indep(req); 1007 return; 1008 case NVME_ID_CNS_ENDGRP_LIST: 1009 nvmet_execute_identify_endgrp_list(req); 1010 return; 1011 } 1012 1013 pr_debug("unhandled identify cns %d on qid %d\n", 1014 req->cmd->identify.cns, req->sq->qid); 1015 req->error_loc = offsetof(struct nvme_identify, cns); 1016 nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_STATUS_DNR); 1017 } 1018 1019 /* 1020 * A "minimum viable" abort implementation: the command is mandatory in the 1021 * spec, but we are not required to do any useful work. We couldn't really 1022 * do a useful abort, so don't bother even with waiting for the command 1023 * to be exectuted and return immediately telling the command to abort 1024 * wasn't found. 1025 */ 1026 static void nvmet_execute_abort(struct nvmet_req *req) 1027 { 1028 if (!nvmet_check_transfer_len(req, 0)) 1029 return; 1030 nvmet_set_result(req, 1); 1031 nvmet_req_complete(req, 0); 1032 } 1033 1034 static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req) 1035 { 1036 u16 status; 1037 1038 if (req->ns->file) 1039 status = nvmet_file_flush(req); 1040 else 1041 status = nvmet_bdev_flush(req); 1042 1043 if (status) 1044 pr_err("write protect flush failed nsid: %u\n", req->ns->nsid); 1045 return status; 1046 } 1047 1048 static u16 nvmet_set_feat_write_protect(struct nvmet_req *req) 1049 { 1050 u32 write_protect = le32_to_cpu(req->cmd->common.cdw11); 1051 struct nvmet_subsys *subsys = nvmet_req_subsys(req); 1052 u16 status; 1053 1054 status = nvmet_req_find_ns(req); 1055 if (status) 1056 return status; 1057 1058 mutex_lock(&subsys->lock); 1059 switch (write_protect) { 1060 case NVME_NS_WRITE_PROTECT: 1061 req->ns->readonly = true; 1062 status = nvmet_write_protect_flush_sync(req); 1063 if (status) 1064 req->ns->readonly = false; 1065 break; 1066 case NVME_NS_NO_WRITE_PROTECT: 1067 req->ns->readonly = false; 1068 status = 0; 1069 break; 1070 default: 1071 break; 1072 } 1073 1074 if (!status) 1075 nvmet_ns_changed(subsys, req->ns->nsid); 1076 mutex_unlock(&subsys->lock); 1077 return status; 1078 } 1079 1080 u16 nvmet_set_feat_kato(struct nvmet_req *req) 1081 { 1082 u32 val32 = le32_to_cpu(req->cmd->common.cdw11); 1083 1084 nvmet_stop_keep_alive_timer(req->sq->ctrl); 1085 req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); 1086 nvmet_start_keep_alive_timer(req->sq->ctrl); 1087 1088 nvmet_set_result(req, req->sq->ctrl->kato); 1089 1090 return 0; 1091 } 1092 1093 u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask) 1094 { 1095 u32 val32 = le32_to_cpu(req->cmd->common.cdw11); 1096 1097 if (val32 & ~mask) { 1098 req->error_loc = offsetof(struct nvme_common_command, cdw11); 1099 return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR; 1100 } 1101 1102 WRITE_ONCE(req->sq->ctrl->aen_enabled, val32); 1103 nvmet_set_result(req, val32); 1104 1105 return 0; 1106 } 1107 1108 void nvmet_execute_set_features(struct nvmet_req *req) 1109 { 1110 struct nvmet_subsys *subsys = nvmet_req_subsys(req); 1111 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); 1112 u32 cdw11 = le32_to_cpu(req->cmd->common.cdw11); 1113 u16 status = 0; 1114 u16 nsqr; 1115 u16 ncqr; 1116 1117 if (!nvmet_check_data_len_lte(req, 0)) 1118 return; 1119 1120 switch (cdw10 & 0xff) { 1121 case NVME_FEAT_NUM_QUEUES: 1122 ncqr = (cdw11 >> 16) & 0xffff; 1123 nsqr = cdw11 & 0xffff; 1124 if (ncqr == 0xffff || nsqr == 0xffff) { 1125 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR; 1126 break; 1127 } 1128 nvmet_set_result(req, 1129 (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16)); 1130 break; 1131 case NVME_FEAT_KATO: 1132 status = nvmet_set_feat_kato(req); 1133 break; 1134 case NVME_FEAT_ASYNC_EVENT: 1135 status = nvmet_set_feat_async_event(req, NVMET_AEN_CFG_ALL); 1136 break; 1137 case NVME_FEAT_HOST_ID: 1138 status = NVME_SC_CMD_SEQ_ERROR | NVME_STATUS_DNR; 1139 break; 1140 case NVME_FEAT_WRITE_PROTECT: 1141 status = nvmet_set_feat_write_protect(req); 1142 break; 1143 case NVME_FEAT_RESV_MASK: 1144 status = nvmet_set_feat_resv_notif_mask(req, cdw11); 1145 break; 1146 default: 1147 req->error_loc = offsetof(struct nvme_common_command, cdw10); 1148 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR; 1149 break; 1150 } 1151 1152 nvmet_req_complete(req, status); 1153 } 1154 1155 static u16 nvmet_get_feat_write_protect(struct nvmet_req *req) 1156 { 1157 struct nvmet_subsys *subsys = nvmet_req_subsys(req); 1158 u32 result; 1159 1160 result = nvmet_req_find_ns(req); 1161 if (result) 1162 return result; 1163 1164 mutex_lock(&subsys->lock); 1165 if (req->ns->readonly == true) 1166 result = NVME_NS_WRITE_PROTECT; 1167 else 1168 result = NVME_NS_NO_WRITE_PROTECT; 1169 nvmet_set_result(req, result); 1170 mutex_unlock(&subsys->lock); 1171 1172 return 0; 1173 } 1174 1175 void nvmet_get_feat_kato(struct nvmet_req *req) 1176 { 1177 nvmet_set_result(req, req->sq->ctrl->kato * 1000); 1178 } 1179 1180 void nvmet_get_feat_async_event(struct nvmet_req *req) 1181 { 1182 nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled)); 1183 } 1184 1185 void nvmet_execute_get_features(struct nvmet_req *req) 1186 { 1187 struct nvmet_subsys *subsys = nvmet_req_subsys(req); 1188 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); 1189 u16 status = 0; 1190 1191 if (!nvmet_check_transfer_len(req, nvmet_feat_data_len(req, cdw10))) 1192 return; 1193 1194 switch (cdw10 & 0xff) { 1195 /* 1196 * These features are mandatory in the spec, but we don't 1197 * have a useful way to implement them. We'll eventually 1198 * need to come up with some fake values for these. 1199 */ 1200 #if 0 1201 case NVME_FEAT_ARBITRATION: 1202 break; 1203 case NVME_FEAT_POWER_MGMT: 1204 break; 1205 case NVME_FEAT_TEMP_THRESH: 1206 break; 1207 case NVME_FEAT_ERR_RECOVERY: 1208 break; 1209 case NVME_FEAT_IRQ_COALESCE: 1210 break; 1211 case NVME_FEAT_IRQ_CONFIG: 1212 break; 1213 case NVME_FEAT_WRITE_ATOMIC: 1214 break; 1215 #endif 1216 case NVME_FEAT_ASYNC_EVENT: 1217 nvmet_get_feat_async_event(req); 1218 break; 1219 case NVME_FEAT_VOLATILE_WC: 1220 nvmet_set_result(req, 1); 1221 break; 1222 case NVME_FEAT_NUM_QUEUES: 1223 nvmet_set_result(req, 1224 (subsys->max_qid-1) | ((subsys->max_qid-1) << 16)); 1225 break; 1226 case NVME_FEAT_KATO: 1227 nvmet_get_feat_kato(req); 1228 break; 1229 case NVME_FEAT_HOST_ID: 1230 /* need 128-bit host identifier flag */ 1231 if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) { 1232 req->error_loc = 1233 offsetof(struct nvme_common_command, cdw11); 1234 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR; 1235 break; 1236 } 1237 1238 status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid, 1239 sizeof(req->sq->ctrl->hostid)); 1240 break; 1241 case NVME_FEAT_WRITE_PROTECT: 1242 status = nvmet_get_feat_write_protect(req); 1243 break; 1244 case NVME_FEAT_RESV_MASK: 1245 status = nvmet_get_feat_resv_notif_mask(req); 1246 break; 1247 default: 1248 req->error_loc = 1249 offsetof(struct nvme_common_command, cdw10); 1250 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR; 1251 break; 1252 } 1253 1254 nvmet_req_complete(req, status); 1255 } 1256 1257 void nvmet_execute_async_event(struct nvmet_req *req) 1258 { 1259 struct nvmet_ctrl *ctrl = req->sq->ctrl; 1260 1261 if (!nvmet_check_transfer_len(req, 0)) 1262 return; 1263 1264 mutex_lock(&ctrl->lock); 1265 if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) { 1266 mutex_unlock(&ctrl->lock); 1267 nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_STATUS_DNR); 1268 return; 1269 } 1270 ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req; 1271 mutex_unlock(&ctrl->lock); 1272 1273 queue_work(nvmet_wq, &ctrl->async_event_work); 1274 } 1275 1276 void nvmet_execute_keep_alive(struct nvmet_req *req) 1277 { 1278 struct nvmet_ctrl *ctrl = req->sq->ctrl; 1279 u16 status = 0; 1280 1281 if (!nvmet_check_transfer_len(req, 0)) 1282 return; 1283 1284 if (!ctrl->kato) { 1285 status = NVME_SC_KA_TIMEOUT_INVALID; 1286 goto out; 1287 } 1288 1289 pr_debug("ctrl %d update keep-alive timer for %d secs\n", 1290 ctrl->cntlid, ctrl->kato); 1291 mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ); 1292 out: 1293 nvmet_req_complete(req, status); 1294 } 1295 1296 u16 nvmet_parse_admin_cmd(struct nvmet_req *req) 1297 { 1298 struct nvme_command *cmd = req->cmd; 1299 u16 ret; 1300 1301 if (nvme_is_fabrics(cmd)) 1302 return nvmet_parse_fabrics_admin_cmd(req); 1303 if (nvmet_is_disc_subsys(nvmet_req_subsys(req))) 1304 return nvmet_parse_discovery_cmd(req); 1305 1306 ret = nvmet_check_ctrl_status(req); 1307 if (unlikely(ret)) 1308 return ret; 1309 1310 if (nvmet_is_passthru_req(req)) 1311 return nvmet_parse_passthru_admin_cmd(req); 1312 1313 switch (cmd->common.opcode) { 1314 case nvme_admin_get_log_page: 1315 req->execute = nvmet_execute_get_log_page; 1316 return 0; 1317 case nvme_admin_identify: 1318 req->execute = nvmet_execute_identify; 1319 return 0; 1320 case nvme_admin_abort_cmd: 1321 req->execute = nvmet_execute_abort; 1322 return 0; 1323 case nvme_admin_set_features: 1324 req->execute = nvmet_execute_set_features; 1325 return 0; 1326 case nvme_admin_get_features: 1327 req->execute = nvmet_execute_get_features; 1328 return 0; 1329 case nvme_admin_async_event: 1330 req->execute = nvmet_execute_async_event; 1331 return 0; 1332 case nvme_admin_keep_alive: 1333 req->execute = nvmet_execute_keep_alive; 1334 return 0; 1335 default: 1336 return nvmet_report_invalid_opcode(req); 1337 } 1338 } 1339