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 10 #include <generated/utsrelease.h> 11 #include <asm/unaligned.h> 12 #include "nvmet.h" 13 14 u32 nvmet_get_log_page_len(struct nvme_command *cmd) 15 { 16 u32 len = le16_to_cpu(cmd->get_log_page.numdu); 17 18 len <<= 16; 19 len += le16_to_cpu(cmd->get_log_page.numdl); 20 /* NUMD is a 0's based value */ 21 len += 1; 22 len *= sizeof(u32); 23 24 return len; 25 } 26 27 static u32 nvmet_feat_data_len(struct nvmet_req *req, u32 cdw10) 28 { 29 switch (cdw10 & 0xff) { 30 case NVME_FEAT_HOST_ID: 31 return sizeof(req->sq->ctrl->hostid); 32 default: 33 return 0; 34 } 35 } 36 37 u64 nvmet_get_log_page_offset(struct nvme_command *cmd) 38 { 39 return le64_to_cpu(cmd->get_log_page.lpo); 40 } 41 42 static void nvmet_execute_get_log_page_noop(struct nvmet_req *req) 43 { 44 nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->transfer_len)); 45 } 46 47 static void nvmet_execute_get_log_page_error(struct nvmet_req *req) 48 { 49 struct nvmet_ctrl *ctrl = req->sq->ctrl; 50 unsigned long flags; 51 off_t offset = 0; 52 u64 slot; 53 u64 i; 54 55 spin_lock_irqsave(&ctrl->error_lock, flags); 56 slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS; 57 58 for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) { 59 if (nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot], 60 sizeof(struct nvme_error_slot))) 61 break; 62 63 if (slot == 0) 64 slot = NVMET_ERROR_LOG_SLOTS - 1; 65 else 66 slot--; 67 offset += sizeof(struct nvme_error_slot); 68 } 69 spin_unlock_irqrestore(&ctrl->error_lock, flags); 70 nvmet_req_complete(req, 0); 71 } 72 73 static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, 74 struct nvme_smart_log *slog) 75 { 76 struct nvmet_ns *ns; 77 u64 host_reads, host_writes, data_units_read, data_units_written; 78 79 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid); 80 if (!ns) { 81 pr_err("Could not find namespace id : %d\n", 82 le32_to_cpu(req->cmd->get_log_page.nsid)); 83 req->error_loc = offsetof(struct nvme_rw_command, nsid); 84 return NVME_SC_INVALID_NS; 85 } 86 87 /* we don't have the right data for file backed ns */ 88 if (!ns->bdev) 89 goto out; 90 91 host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]); 92 data_units_read = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part, 93 sectors[READ]), 1000); 94 host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]); 95 data_units_written = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part, 96 sectors[WRITE]), 1000); 97 98 put_unaligned_le64(host_reads, &slog->host_reads[0]); 99 put_unaligned_le64(data_units_read, &slog->data_units_read[0]); 100 put_unaligned_le64(host_writes, &slog->host_writes[0]); 101 put_unaligned_le64(data_units_written, &slog->data_units_written[0]); 102 out: 103 nvmet_put_namespace(ns); 104 105 return NVME_SC_SUCCESS; 106 } 107 108 static u16 nvmet_get_smart_log_all(struct nvmet_req *req, 109 struct nvme_smart_log *slog) 110 { 111 u64 host_reads = 0, host_writes = 0; 112 u64 data_units_read = 0, data_units_written = 0; 113 struct nvmet_ns *ns; 114 struct nvmet_ctrl *ctrl; 115 116 ctrl = req->sq->ctrl; 117 118 rcu_read_lock(); 119 list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { 120 /* we don't have the right data for file backed ns */ 121 if (!ns->bdev) 122 continue; 123 host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]); 124 data_units_read += DIV_ROUND_UP( 125 part_stat_read(ns->bdev->bd_part, sectors[READ]), 1000); 126 host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]); 127 data_units_written += DIV_ROUND_UP( 128 part_stat_read(ns->bdev->bd_part, sectors[WRITE]), 1000); 129 130 } 131 rcu_read_unlock(); 132 133 put_unaligned_le64(host_reads, &slog->host_reads[0]); 134 put_unaligned_le64(data_units_read, &slog->data_units_read[0]); 135 put_unaligned_le64(host_writes, &slog->host_writes[0]); 136 put_unaligned_le64(data_units_written, &slog->data_units_written[0]); 137 138 return NVME_SC_SUCCESS; 139 } 140 141 static void nvmet_execute_get_log_page_smart(struct nvmet_req *req) 142 { 143 struct nvme_smart_log *log; 144 u16 status = NVME_SC_INTERNAL; 145 unsigned long flags; 146 147 if (req->transfer_len != sizeof(*log)) 148 goto out; 149 150 log = kzalloc(sizeof(*log), GFP_KERNEL); 151 if (!log) 152 goto out; 153 154 if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL)) 155 status = nvmet_get_smart_log_all(req, log); 156 else 157 status = nvmet_get_smart_log_nsid(req, log); 158 if (status) 159 goto out_free_log; 160 161 spin_lock_irqsave(&req->sq->ctrl->error_lock, flags); 162 put_unaligned_le64(req->sq->ctrl->err_counter, 163 &log->num_err_log_entries); 164 spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags); 165 166 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 167 out_free_log: 168 kfree(log); 169 out: 170 nvmet_req_complete(req, status); 171 } 172 173 static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) 174 { 175 u16 status = NVME_SC_INTERNAL; 176 struct nvme_effects_log *log; 177 178 log = kzalloc(sizeof(*log), GFP_KERNEL); 179 if (!log) 180 goto out; 181 182 log->acs[nvme_admin_get_log_page] = cpu_to_le32(1 << 0); 183 log->acs[nvme_admin_identify] = cpu_to_le32(1 << 0); 184 log->acs[nvme_admin_abort_cmd] = cpu_to_le32(1 << 0); 185 log->acs[nvme_admin_set_features] = cpu_to_le32(1 << 0); 186 log->acs[nvme_admin_get_features] = cpu_to_le32(1 << 0); 187 log->acs[nvme_admin_async_event] = cpu_to_le32(1 << 0); 188 log->acs[nvme_admin_keep_alive] = cpu_to_le32(1 << 0); 189 190 log->iocs[nvme_cmd_read] = cpu_to_le32(1 << 0); 191 log->iocs[nvme_cmd_write] = cpu_to_le32(1 << 0); 192 log->iocs[nvme_cmd_flush] = cpu_to_le32(1 << 0); 193 log->iocs[nvme_cmd_dsm] = cpu_to_le32(1 << 0); 194 log->iocs[nvme_cmd_write_zeroes] = cpu_to_le32(1 << 0); 195 196 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 197 198 kfree(log); 199 out: 200 nvmet_req_complete(req, status); 201 } 202 203 static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req) 204 { 205 struct nvmet_ctrl *ctrl = req->sq->ctrl; 206 u16 status = NVME_SC_INTERNAL; 207 size_t len; 208 209 if (req->transfer_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32)) 210 goto out; 211 212 mutex_lock(&ctrl->lock); 213 if (ctrl->nr_changed_ns == U32_MAX) 214 len = sizeof(__le32); 215 else 216 len = ctrl->nr_changed_ns * sizeof(__le32); 217 status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len); 218 if (!status) 219 status = nvmet_zero_sgl(req, len, req->transfer_len - len); 220 ctrl->nr_changed_ns = 0; 221 nvmet_clear_aen_bit(req, NVME_AEN_BIT_NS_ATTR); 222 mutex_unlock(&ctrl->lock); 223 out: 224 nvmet_req_complete(req, status); 225 } 226 227 static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid, 228 struct nvme_ana_group_desc *desc) 229 { 230 struct nvmet_ctrl *ctrl = req->sq->ctrl; 231 struct nvmet_ns *ns; 232 u32 count = 0; 233 234 if (!(req->cmd->get_log_page.lsp & NVME_ANA_LOG_RGO)) { 235 rcu_read_lock(); 236 list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) 237 if (ns->anagrpid == grpid) 238 desc->nsids[count++] = cpu_to_le32(ns->nsid); 239 rcu_read_unlock(); 240 } 241 242 desc->grpid = cpu_to_le32(grpid); 243 desc->nnsids = cpu_to_le32(count); 244 desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt); 245 desc->state = req->port->ana_state[grpid]; 246 memset(desc->rsvd17, 0, sizeof(desc->rsvd17)); 247 return sizeof(struct nvme_ana_group_desc) + count * sizeof(__le32); 248 } 249 250 static void nvmet_execute_get_log_page_ana(struct nvmet_req *req) 251 { 252 struct nvme_ana_rsp_hdr hdr = { 0, }; 253 struct nvme_ana_group_desc *desc; 254 size_t offset = sizeof(struct nvme_ana_rsp_hdr); /* start beyond hdr */ 255 size_t len; 256 u32 grpid; 257 u16 ngrps = 0; 258 u16 status; 259 260 status = NVME_SC_INTERNAL; 261 desc = kmalloc(sizeof(struct nvme_ana_group_desc) + 262 NVMET_MAX_NAMESPACES * sizeof(__le32), GFP_KERNEL); 263 if (!desc) 264 goto out; 265 266 down_read(&nvmet_ana_sem); 267 for (grpid = 1; grpid <= NVMET_MAX_ANAGRPS; grpid++) { 268 if (!nvmet_ana_group_enabled[grpid]) 269 continue; 270 len = nvmet_format_ana_group(req, grpid, desc); 271 status = nvmet_copy_to_sgl(req, offset, desc, len); 272 if (status) 273 break; 274 offset += len; 275 ngrps++; 276 } 277 for ( ; grpid <= NVMET_MAX_ANAGRPS; grpid++) { 278 if (nvmet_ana_group_enabled[grpid]) 279 ngrps++; 280 } 281 282 hdr.chgcnt = cpu_to_le64(nvmet_ana_chgcnt); 283 hdr.ngrps = cpu_to_le16(ngrps); 284 nvmet_clear_aen_bit(req, NVME_AEN_BIT_ANA_CHANGE); 285 up_read(&nvmet_ana_sem); 286 287 kfree(desc); 288 289 /* copy the header last once we know the number of groups */ 290 status = nvmet_copy_to_sgl(req, 0, &hdr, sizeof(hdr)); 291 out: 292 nvmet_req_complete(req, status); 293 } 294 295 static void nvmet_execute_get_log_page(struct nvmet_req *req) 296 { 297 if (!nvmet_check_data_len(req, nvmet_get_log_page_len(req->cmd))) 298 return; 299 300 switch (req->cmd->get_log_page.lid) { 301 case NVME_LOG_ERROR: 302 return nvmet_execute_get_log_page_error(req); 303 case NVME_LOG_SMART: 304 return nvmet_execute_get_log_page_smart(req); 305 case NVME_LOG_FW_SLOT: 306 /* 307 * We only support a single firmware slot which always is 308 * active, so we can zero out the whole firmware slot log and 309 * still claim to fully implement this mandatory log page. 310 */ 311 return nvmet_execute_get_log_page_noop(req); 312 case NVME_LOG_CHANGED_NS: 313 return nvmet_execute_get_log_changed_ns(req); 314 case NVME_LOG_CMD_EFFECTS: 315 return nvmet_execute_get_log_cmd_effects_ns(req); 316 case NVME_LOG_ANA: 317 return nvmet_execute_get_log_page_ana(req); 318 } 319 pr_err("unhandled lid %d on qid %d\n", 320 req->cmd->get_log_page.lid, req->sq->qid); 321 req->error_loc = offsetof(struct nvme_get_log_page_command, lid); 322 nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR); 323 } 324 325 static void nvmet_execute_identify_ctrl(struct nvmet_req *req) 326 { 327 struct nvmet_ctrl *ctrl = req->sq->ctrl; 328 struct nvme_id_ctrl *id; 329 u16 status = 0; 330 const char model[] = "Linux"; 331 332 id = kzalloc(sizeof(*id), GFP_KERNEL); 333 if (!id) { 334 status = NVME_SC_INTERNAL; 335 goto out; 336 } 337 338 /* XXX: figure out how to assign real vendors IDs. */ 339 id->vid = 0; 340 id->ssvid = 0; 341 342 memset(id->sn, ' ', sizeof(id->sn)); 343 bin2hex(id->sn, &ctrl->subsys->serial, 344 min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2)); 345 memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' '); 346 memcpy_and_pad(id->fr, sizeof(id->fr), 347 UTS_RELEASE, strlen(UTS_RELEASE), ' '); 348 349 id->rab = 6; 350 351 /* 352 * XXX: figure out how we can assign a IEEE OUI, but until then 353 * the safest is to leave it as zeroes. 354 */ 355 356 /* we support multiple ports, multiples hosts and ANA: */ 357 id->cmic = (1 << 0) | (1 << 1) | (1 << 3); 358 359 /* no limit on data transfer sizes for now */ 360 id->mdts = 0; 361 id->cntlid = cpu_to_le16(ctrl->cntlid); 362 id->ver = cpu_to_le32(ctrl->subsys->ver); 363 364 /* XXX: figure out what to do about RTD3R/RTD3 */ 365 id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL); 366 id->ctratt = cpu_to_le32(NVME_CTRL_ATTR_HID_128_BIT | 367 NVME_CTRL_ATTR_TBKAS); 368 369 id->oacs = 0; 370 371 /* 372 * We don't really have a practical limit on the number of abort 373 * comands. But we don't do anything useful for abort either, so 374 * no point in allowing more abort commands than the spec requires. 375 */ 376 id->acl = 3; 377 378 id->aerl = NVMET_ASYNC_EVENTS - 1; 379 380 /* first slot is read-only, only one slot supported */ 381 id->frmw = (1 << 0) | (1 << 1); 382 id->lpa = (1 << 0) | (1 << 1) | (1 << 2); 383 id->elpe = NVMET_ERROR_LOG_SLOTS - 1; 384 id->npss = 0; 385 386 /* We support keep-alive timeout in granularity of seconds */ 387 id->kas = cpu_to_le16(NVMET_KAS); 388 389 id->sqes = (0x6 << 4) | 0x6; 390 id->cqes = (0x4 << 4) | 0x4; 391 392 /* no enforcement soft-limit for maxcmd - pick arbitrary high value */ 393 id->maxcmd = cpu_to_le16(NVMET_MAX_CMD); 394 395 id->nn = cpu_to_le32(ctrl->subsys->max_nsid); 396 id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES); 397 id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | 398 NVME_CTRL_ONCS_WRITE_ZEROES); 399 400 /* XXX: don't report vwc if the underlying device is write through */ 401 id->vwc = NVME_CTRL_VWC_PRESENT; 402 403 /* 404 * We can't support atomic writes bigger than a LBA without support 405 * from the backend device. 406 */ 407 id->awun = 0; 408 id->awupf = 0; 409 410 id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */ 411 if (ctrl->ops->has_keyed_sgls) 412 id->sgls |= cpu_to_le32(1 << 2); 413 if (req->port->inline_data_size) 414 id->sgls |= cpu_to_le32(1 << 20); 415 416 strlcpy(id->subnqn, ctrl->subsys->subsysnqn, sizeof(id->subnqn)); 417 418 /* Max command capsule size is sqe + single page of in-capsule data */ 419 id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) + 420 req->port->inline_data_size) / 16); 421 /* Max response capsule size is cqe */ 422 id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16); 423 424 id->msdbd = ctrl->ops->msdbd; 425 426 id->anacap = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4); 427 id->anatt = 10; /* random value */ 428 id->anagrpmax = cpu_to_le32(NVMET_MAX_ANAGRPS); 429 id->nanagrpid = cpu_to_le32(NVMET_MAX_ANAGRPS); 430 431 /* 432 * Meh, we don't really support any power state. Fake up the same 433 * values that qemu does. 434 */ 435 id->psd[0].max_power = cpu_to_le16(0x9c4); 436 id->psd[0].entry_lat = cpu_to_le32(0x10); 437 id->psd[0].exit_lat = cpu_to_le32(0x4); 438 439 id->nwpc = 1 << 0; /* write protect and no write protect */ 440 441 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 442 443 kfree(id); 444 out: 445 nvmet_req_complete(req, status); 446 } 447 448 static void nvmet_execute_identify_ns(struct nvmet_req *req) 449 { 450 struct nvmet_ns *ns; 451 struct nvme_id_ns *id; 452 u16 status = 0; 453 454 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) { 455 req->error_loc = offsetof(struct nvme_identify, nsid); 456 status = NVME_SC_INVALID_NS | NVME_SC_DNR; 457 goto out; 458 } 459 460 id = kzalloc(sizeof(*id), GFP_KERNEL); 461 if (!id) { 462 status = NVME_SC_INTERNAL; 463 goto out; 464 } 465 466 /* return an all zeroed buffer if we can't find an active namespace */ 467 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid); 468 if (!ns) 469 goto done; 470 471 /* 472 * nuse = ncap = nsze isn't always true, but we have no way to find 473 * that out from the underlying device. 474 */ 475 id->ncap = id->nsze = cpu_to_le64(ns->size >> ns->blksize_shift); 476 switch (req->port->ana_state[ns->anagrpid]) { 477 case NVME_ANA_INACCESSIBLE: 478 case NVME_ANA_PERSISTENT_LOSS: 479 break; 480 default: 481 id->nuse = id->nsze; 482 break; 483 } 484 485 if (ns->bdev) 486 nvmet_bdev_set_limits(ns->bdev, id); 487 488 /* 489 * We just provide a single LBA format that matches what the 490 * underlying device reports. 491 */ 492 id->nlbaf = 0; 493 id->flbas = 0; 494 495 /* 496 * Our namespace might always be shared. Not just with other 497 * controllers, but also with any other user of the block device. 498 */ 499 id->nmic = (1 << 0); 500 id->anagrpid = cpu_to_le32(ns->anagrpid); 501 502 memcpy(&id->nguid, &ns->nguid, sizeof(id->nguid)); 503 504 id->lbaf[0].ds = ns->blksize_shift; 505 506 if (ns->readonly) 507 id->nsattr |= (1 << 0); 508 nvmet_put_namespace(ns); 509 done: 510 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 511 kfree(id); 512 out: 513 nvmet_req_complete(req, status); 514 } 515 516 static void nvmet_execute_identify_nslist(struct nvmet_req *req) 517 { 518 static const int buf_size = NVME_IDENTIFY_DATA_SIZE; 519 struct nvmet_ctrl *ctrl = req->sq->ctrl; 520 struct nvmet_ns *ns; 521 u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid); 522 __le32 *list; 523 u16 status = 0; 524 int i = 0; 525 526 list = kzalloc(buf_size, GFP_KERNEL); 527 if (!list) { 528 status = NVME_SC_INTERNAL; 529 goto out; 530 } 531 532 rcu_read_lock(); 533 list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { 534 if (ns->nsid <= min_nsid) 535 continue; 536 list[i++] = cpu_to_le32(ns->nsid); 537 if (i == buf_size / sizeof(__le32)) 538 break; 539 } 540 rcu_read_unlock(); 541 542 status = nvmet_copy_to_sgl(req, 0, list, buf_size); 543 544 kfree(list); 545 out: 546 nvmet_req_complete(req, status); 547 } 548 549 static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len, 550 void *id, off_t *off) 551 { 552 struct nvme_ns_id_desc desc = { 553 .nidt = type, 554 .nidl = len, 555 }; 556 u16 status; 557 558 status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc)); 559 if (status) 560 return status; 561 *off += sizeof(desc); 562 563 status = nvmet_copy_to_sgl(req, *off, id, len); 564 if (status) 565 return status; 566 *off += len; 567 568 return 0; 569 } 570 571 static void nvmet_execute_identify_desclist(struct nvmet_req *req) 572 { 573 struct nvmet_ns *ns; 574 u16 status = 0; 575 off_t off = 0; 576 577 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid); 578 if (!ns) { 579 req->error_loc = offsetof(struct nvme_identify, nsid); 580 status = NVME_SC_INVALID_NS | NVME_SC_DNR; 581 goto out; 582 } 583 584 if (memchr_inv(&ns->uuid, 0, sizeof(ns->uuid))) { 585 status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID, 586 NVME_NIDT_UUID_LEN, 587 &ns->uuid, &off); 588 if (status) 589 goto out_put_ns; 590 } 591 if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid))) { 592 status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID, 593 NVME_NIDT_NGUID_LEN, 594 &ns->nguid, &off); 595 if (status) 596 goto out_put_ns; 597 } 598 599 if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off, 600 off) != NVME_IDENTIFY_DATA_SIZE - off) 601 status = NVME_SC_INTERNAL | NVME_SC_DNR; 602 out_put_ns: 603 nvmet_put_namespace(ns); 604 out: 605 nvmet_req_complete(req, status); 606 } 607 608 static void nvmet_execute_identify(struct nvmet_req *req) 609 { 610 if (!nvmet_check_data_len(req, NVME_IDENTIFY_DATA_SIZE)) 611 return; 612 613 switch (req->cmd->identify.cns) { 614 case NVME_ID_CNS_NS: 615 return nvmet_execute_identify_ns(req); 616 case NVME_ID_CNS_CTRL: 617 return nvmet_execute_identify_ctrl(req); 618 case NVME_ID_CNS_NS_ACTIVE_LIST: 619 return nvmet_execute_identify_nslist(req); 620 case NVME_ID_CNS_NS_DESC_LIST: 621 return nvmet_execute_identify_desclist(req); 622 } 623 624 pr_err("unhandled identify cns %d on qid %d\n", 625 req->cmd->identify.cns, req->sq->qid); 626 req->error_loc = offsetof(struct nvme_identify, cns); 627 nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR); 628 } 629 630 /* 631 * A "minimum viable" abort implementation: the command is mandatory in the 632 * spec, but we are not required to do any useful work. We couldn't really 633 * do a useful abort, so don't bother even with waiting for the command 634 * to be exectuted and return immediately telling the command to abort 635 * wasn't found. 636 */ 637 static void nvmet_execute_abort(struct nvmet_req *req) 638 { 639 if (!nvmet_check_data_len(req, 0)) 640 return; 641 nvmet_set_result(req, 1); 642 nvmet_req_complete(req, 0); 643 } 644 645 static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req) 646 { 647 u16 status; 648 649 if (req->ns->file) 650 status = nvmet_file_flush(req); 651 else 652 status = nvmet_bdev_flush(req); 653 654 if (status) 655 pr_err("write protect flush failed nsid: %u\n", req->ns->nsid); 656 return status; 657 } 658 659 static u16 nvmet_set_feat_write_protect(struct nvmet_req *req) 660 { 661 u32 write_protect = le32_to_cpu(req->cmd->common.cdw11); 662 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 663 u16 status = NVME_SC_FEATURE_NOT_CHANGEABLE; 664 665 req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->rw.nsid); 666 if (unlikely(!req->ns)) { 667 req->error_loc = offsetof(struct nvme_common_command, nsid); 668 return status; 669 } 670 671 mutex_lock(&subsys->lock); 672 switch (write_protect) { 673 case NVME_NS_WRITE_PROTECT: 674 req->ns->readonly = true; 675 status = nvmet_write_protect_flush_sync(req); 676 if (status) 677 req->ns->readonly = false; 678 break; 679 case NVME_NS_NO_WRITE_PROTECT: 680 req->ns->readonly = false; 681 status = 0; 682 break; 683 default: 684 break; 685 } 686 687 if (!status) 688 nvmet_ns_changed(subsys, req->ns->nsid); 689 mutex_unlock(&subsys->lock); 690 return status; 691 } 692 693 u16 nvmet_set_feat_kato(struct nvmet_req *req) 694 { 695 u32 val32 = le32_to_cpu(req->cmd->common.cdw11); 696 697 req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); 698 699 nvmet_set_result(req, req->sq->ctrl->kato); 700 701 return 0; 702 } 703 704 u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask) 705 { 706 u32 val32 = le32_to_cpu(req->cmd->common.cdw11); 707 708 if (val32 & ~mask) { 709 req->error_loc = offsetof(struct nvme_common_command, cdw11); 710 return NVME_SC_INVALID_FIELD | NVME_SC_DNR; 711 } 712 713 WRITE_ONCE(req->sq->ctrl->aen_enabled, val32); 714 nvmet_set_result(req, val32); 715 716 return 0; 717 } 718 719 static void nvmet_execute_set_features(struct nvmet_req *req) 720 { 721 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 722 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); 723 u16 status = 0; 724 725 if (!nvmet_check_data_len(req, 0)) 726 return; 727 728 switch (cdw10 & 0xff) { 729 case NVME_FEAT_NUM_QUEUES: 730 nvmet_set_result(req, 731 (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16)); 732 break; 733 case NVME_FEAT_KATO: 734 status = nvmet_set_feat_kato(req); 735 break; 736 case NVME_FEAT_ASYNC_EVENT: 737 status = nvmet_set_feat_async_event(req, NVMET_AEN_CFG_ALL); 738 break; 739 case NVME_FEAT_HOST_ID: 740 status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; 741 break; 742 case NVME_FEAT_WRITE_PROTECT: 743 status = nvmet_set_feat_write_protect(req); 744 break; 745 default: 746 req->error_loc = offsetof(struct nvme_common_command, cdw10); 747 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 748 break; 749 } 750 751 nvmet_req_complete(req, status); 752 } 753 754 static u16 nvmet_get_feat_write_protect(struct nvmet_req *req) 755 { 756 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 757 u32 result; 758 759 req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->common.nsid); 760 if (!req->ns) { 761 req->error_loc = offsetof(struct nvme_common_command, nsid); 762 return NVME_SC_INVALID_NS | NVME_SC_DNR; 763 } 764 mutex_lock(&subsys->lock); 765 if (req->ns->readonly == true) 766 result = NVME_NS_WRITE_PROTECT; 767 else 768 result = NVME_NS_NO_WRITE_PROTECT; 769 nvmet_set_result(req, result); 770 mutex_unlock(&subsys->lock); 771 772 return 0; 773 } 774 775 void nvmet_get_feat_kato(struct nvmet_req *req) 776 { 777 nvmet_set_result(req, req->sq->ctrl->kato * 1000); 778 } 779 780 void nvmet_get_feat_async_event(struct nvmet_req *req) 781 { 782 nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled)); 783 } 784 785 static void nvmet_execute_get_features(struct nvmet_req *req) 786 { 787 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 788 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); 789 u16 status = 0; 790 791 if (!nvmet_check_data_len(req, nvmet_feat_data_len(req, cdw10))) 792 return; 793 794 switch (cdw10 & 0xff) { 795 /* 796 * These features are mandatory in the spec, but we don't 797 * have a useful way to implement them. We'll eventually 798 * need to come up with some fake values for these. 799 */ 800 #if 0 801 case NVME_FEAT_ARBITRATION: 802 break; 803 case NVME_FEAT_POWER_MGMT: 804 break; 805 case NVME_FEAT_TEMP_THRESH: 806 break; 807 case NVME_FEAT_ERR_RECOVERY: 808 break; 809 case NVME_FEAT_IRQ_COALESCE: 810 break; 811 case NVME_FEAT_IRQ_CONFIG: 812 break; 813 case NVME_FEAT_WRITE_ATOMIC: 814 break; 815 #endif 816 case NVME_FEAT_ASYNC_EVENT: 817 nvmet_get_feat_async_event(req); 818 break; 819 case NVME_FEAT_VOLATILE_WC: 820 nvmet_set_result(req, 1); 821 break; 822 case NVME_FEAT_NUM_QUEUES: 823 nvmet_set_result(req, 824 (subsys->max_qid-1) | ((subsys->max_qid-1) << 16)); 825 break; 826 case NVME_FEAT_KATO: 827 nvmet_get_feat_kato(req); 828 break; 829 case NVME_FEAT_HOST_ID: 830 /* need 128-bit host identifier flag */ 831 if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) { 832 req->error_loc = 833 offsetof(struct nvme_common_command, cdw11); 834 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 835 break; 836 } 837 838 status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid, 839 sizeof(req->sq->ctrl->hostid)); 840 break; 841 case NVME_FEAT_WRITE_PROTECT: 842 status = nvmet_get_feat_write_protect(req); 843 break; 844 default: 845 req->error_loc = 846 offsetof(struct nvme_common_command, cdw10); 847 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 848 break; 849 } 850 851 nvmet_req_complete(req, status); 852 } 853 854 void nvmet_execute_async_event(struct nvmet_req *req) 855 { 856 struct nvmet_ctrl *ctrl = req->sq->ctrl; 857 858 if (!nvmet_check_data_len(req, 0)) 859 return; 860 861 mutex_lock(&ctrl->lock); 862 if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) { 863 mutex_unlock(&ctrl->lock); 864 nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR); 865 return; 866 } 867 ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req; 868 mutex_unlock(&ctrl->lock); 869 870 schedule_work(&ctrl->async_event_work); 871 } 872 873 void nvmet_execute_keep_alive(struct nvmet_req *req) 874 { 875 struct nvmet_ctrl *ctrl = req->sq->ctrl; 876 877 if (!nvmet_check_data_len(req, 0)) 878 return; 879 880 pr_debug("ctrl %d update keep-alive timer for %d secs\n", 881 ctrl->cntlid, ctrl->kato); 882 883 mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ); 884 nvmet_req_complete(req, 0); 885 } 886 887 u16 nvmet_parse_admin_cmd(struct nvmet_req *req) 888 { 889 struct nvme_command *cmd = req->cmd; 890 u16 ret; 891 892 if (nvme_is_fabrics(cmd)) 893 return nvmet_parse_fabrics_cmd(req); 894 if (req->sq->ctrl->subsys->type == NVME_NQN_DISC) 895 return nvmet_parse_discovery_cmd(req); 896 897 ret = nvmet_check_ctrl_status(req, cmd); 898 if (unlikely(ret)) 899 return ret; 900 901 switch (cmd->common.opcode) { 902 case nvme_admin_get_log_page: 903 req->execute = nvmet_execute_get_log_page; 904 return 0; 905 case nvme_admin_identify: 906 req->execute = nvmet_execute_identify; 907 return 0; 908 case nvme_admin_abort_cmd: 909 req->execute = nvmet_execute_abort; 910 return 0; 911 case nvme_admin_set_features: 912 req->execute = nvmet_execute_set_features; 913 return 0; 914 case nvme_admin_get_features: 915 req->execute = nvmet_execute_get_features; 916 return 0; 917 case nvme_admin_async_event: 918 req->execute = nvmet_execute_async_event; 919 return 0; 920 case nvme_admin_keep_alive: 921 req->execute = nvmet_execute_keep_alive; 922 return 0; 923 } 924 925 pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode, 926 req->sq->qid); 927 req->error_loc = offsetof(struct nvme_common_command, opcode); 928 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; 929 } 930