1 // SPDX-License-Identifier: GPL-2.0
3 * NVMe admin command implementation.
4 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/module.h>
8 #include <linux/rculist.h>
10 #include <generated/utsrelease.h>
11 #include <asm/unaligned.h>
14 u32 nvmet_get_log_page_len(struct nvme_command *cmd)
16 u32 len = le16_to_cpu(cmd->get_log_page.numdu);
19 len += le16_to_cpu(cmd->get_log_page.numdl);
20 /* NUMD is a 0's based value */
27 u64 nvmet_get_log_page_offset(struct nvme_command *cmd)
29 return le64_to_cpu(cmd->get_log_page.lpo);
32 static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
34 nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->data_len));
37 static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
39 struct nvmet_ctrl *ctrl = req->sq->ctrl;
40 u16 status = NVME_SC_SUCCESS;
46 spin_lock_irqsave(&ctrl->error_lock, flags);
47 slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS;
49 for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) {
50 status = nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot],
51 sizeof(struct nvme_error_slot));
56 slot = NVMET_ERROR_LOG_SLOTS - 1;
59 offset += sizeof(struct nvme_error_slot);
61 spin_unlock_irqrestore(&ctrl->error_lock, flags);
62 nvmet_req_complete(req, status);
65 static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,
66 struct nvme_smart_log *slog)
69 u64 host_reads, host_writes, data_units_read, data_units_written;
71 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid);
73 pr_err("Could not find namespace id : %d\n",
74 le32_to_cpu(req->cmd->get_log_page.nsid));
75 req->error_loc = offsetof(struct nvme_rw_command, nsid);
76 return NVME_SC_INVALID_NS;
79 /* we don't have the right data for file backed ns */
83 host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]);
84 data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]);
85 host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]);
86 data_units_written = part_stat_read(ns->bdev->bd_part, sectors[WRITE]);
88 put_unaligned_le64(host_reads, &slog->host_reads[0]);
89 put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
90 put_unaligned_le64(host_writes, &slog->host_writes[0]);
91 put_unaligned_le64(data_units_written, &slog->data_units_written[0]);
93 nvmet_put_namespace(ns);
95 return NVME_SC_SUCCESS;
98 static u16 nvmet_get_smart_log_all(struct nvmet_req *req,
99 struct nvme_smart_log *slog)
101 u64 host_reads = 0, host_writes = 0;
102 u64 data_units_read = 0, data_units_written = 0;
104 struct nvmet_ctrl *ctrl;
106 ctrl = req->sq->ctrl;
109 list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) {
110 /* we don't have the right data for file backed ns */
113 host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]);
115 part_stat_read(ns->bdev->bd_part, sectors[READ]);
116 host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]);
117 data_units_written +=
118 part_stat_read(ns->bdev->bd_part, sectors[WRITE]);
123 put_unaligned_le64(host_reads, &slog->host_reads[0]);
124 put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
125 put_unaligned_le64(host_writes, &slog->host_writes[0]);
126 put_unaligned_le64(data_units_written, &slog->data_units_written[0]);
128 return NVME_SC_SUCCESS;
131 static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
133 struct nvme_smart_log *log;
134 u16 status = NVME_SC_INTERNAL;
137 if (req->data_len != sizeof(*log))
140 log = kzalloc(sizeof(*log), GFP_KERNEL);
144 if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL))
145 status = nvmet_get_smart_log_all(req, log);
147 status = nvmet_get_smart_log_nsid(req, log);
151 spin_lock_irqsave(&req->sq->ctrl->error_lock, flags);
152 put_unaligned_le64(req->sq->ctrl->err_counter,
153 &log->num_err_log_entries);
154 spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags);
156 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
160 nvmet_req_complete(req, status);
163 static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req)
165 u16 status = NVME_SC_INTERNAL;
166 struct nvme_effects_log *log;
168 log = kzalloc(sizeof(*log), GFP_KERNEL);
172 log->acs[nvme_admin_get_log_page] = cpu_to_le32(1 << 0);
173 log->acs[nvme_admin_identify] = cpu_to_le32(1 << 0);
174 log->acs[nvme_admin_abort_cmd] = cpu_to_le32(1 << 0);
175 log->acs[nvme_admin_set_features] = cpu_to_le32(1 << 0);
176 log->acs[nvme_admin_get_features] = cpu_to_le32(1 << 0);
177 log->acs[nvme_admin_async_event] = cpu_to_le32(1 << 0);
178 log->acs[nvme_admin_keep_alive] = cpu_to_le32(1 << 0);
180 log->iocs[nvme_cmd_read] = cpu_to_le32(1 << 0);
181 log->iocs[nvme_cmd_write] = cpu_to_le32(1 << 0);
182 log->iocs[nvme_cmd_flush] = cpu_to_le32(1 << 0);
183 log->iocs[nvme_cmd_dsm] = cpu_to_le32(1 << 0);
184 log->iocs[nvme_cmd_write_zeroes] = cpu_to_le32(1 << 0);
186 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
190 nvmet_req_complete(req, status);
193 static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req)
195 struct nvmet_ctrl *ctrl = req->sq->ctrl;
196 u16 status = NVME_SC_INTERNAL;
199 if (req->data_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32))
202 mutex_lock(&ctrl->lock);
203 if (ctrl->nr_changed_ns == U32_MAX)
204 len = sizeof(__le32);
206 len = ctrl->nr_changed_ns * sizeof(__le32);
207 status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len);
209 status = nvmet_zero_sgl(req, len, req->data_len - len);
210 ctrl->nr_changed_ns = 0;
211 nvmet_clear_aen_bit(req, NVME_AEN_BIT_NS_ATTR);
212 mutex_unlock(&ctrl->lock);
214 nvmet_req_complete(req, status);
217 static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid,
218 struct nvme_ana_group_desc *desc)
220 struct nvmet_ctrl *ctrl = req->sq->ctrl;
224 if (!(req->cmd->get_log_page.lsp & NVME_ANA_LOG_RGO)) {
226 list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link)
227 if (ns->anagrpid == grpid)
228 desc->nsids[count++] = cpu_to_le32(ns->nsid);
232 desc->grpid = cpu_to_le32(grpid);
233 desc->nnsids = cpu_to_le32(count);
234 desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt);
235 desc->state = req->port->ana_state[grpid];
236 memset(desc->rsvd17, 0, sizeof(desc->rsvd17));
237 return sizeof(struct nvme_ana_group_desc) + count * sizeof(__le32);
240 static void nvmet_execute_get_log_page_ana(struct nvmet_req *req)
242 struct nvme_ana_rsp_hdr hdr = { 0, };
243 struct nvme_ana_group_desc *desc;
244 size_t offset = sizeof(struct nvme_ana_rsp_hdr); /* start beyond hdr */
250 status = NVME_SC_INTERNAL;
251 desc = kmalloc(sizeof(struct nvme_ana_group_desc) +
252 NVMET_MAX_NAMESPACES * sizeof(__le32), GFP_KERNEL);
256 down_read(&nvmet_ana_sem);
257 for (grpid = 1; grpid <= NVMET_MAX_ANAGRPS; grpid++) {
258 if (!nvmet_ana_group_enabled[grpid])
260 len = nvmet_format_ana_group(req, grpid, desc);
261 status = nvmet_copy_to_sgl(req, offset, desc, len);
267 for ( ; grpid <= NVMET_MAX_ANAGRPS; grpid++) {
268 if (nvmet_ana_group_enabled[grpid])
272 hdr.chgcnt = cpu_to_le64(nvmet_ana_chgcnt);
273 hdr.ngrps = cpu_to_le16(ngrps);
274 nvmet_clear_aen_bit(req, NVME_AEN_BIT_ANA_CHANGE);
275 up_read(&nvmet_ana_sem);
279 /* copy the header last once we know the number of groups */
280 status = nvmet_copy_to_sgl(req, 0, &hdr, sizeof(hdr));
282 nvmet_req_complete(req, status);
285 static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
287 struct nvmet_ctrl *ctrl = req->sq->ctrl;
288 struct nvme_id_ctrl *id;
290 const char model[] = "Linux";
292 id = kzalloc(sizeof(*id), GFP_KERNEL);
294 status = NVME_SC_INTERNAL;
298 /* XXX: figure out how to assign real vendors IDs. */
302 memset(id->sn, ' ', sizeof(id->sn));
303 bin2hex(id->sn, &ctrl->subsys->serial,
304 min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
305 memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' ');
306 memcpy_and_pad(id->fr, sizeof(id->fr),
307 UTS_RELEASE, strlen(UTS_RELEASE), ' ');
312 * XXX: figure out how we can assign a IEEE OUI, but until then
313 * the safest is to leave it as zeroes.
316 /* we support multiple ports, multiples hosts and ANA: */
317 id->cmic = (1 << 0) | (1 << 1) | (1 << 3);
319 /* no limit on data transfer sizes for now */
321 id->cntlid = cpu_to_le16(ctrl->cntlid);
322 id->ver = cpu_to_le32(ctrl->subsys->ver);
324 /* XXX: figure out what to do about RTD3R/RTD3 */
325 id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL);
326 id->ctratt = cpu_to_le32(NVME_CTRL_ATTR_HID_128_BIT |
327 NVME_CTRL_ATTR_TBKAS);
332 * We don't really have a practical limit on the number of abort
333 * comands. But we don't do anything useful for abort either, so
334 * no point in allowing more abort commands than the spec requires.
338 id->aerl = NVMET_ASYNC_EVENTS - 1;
340 /* first slot is read-only, only one slot supported */
341 id->frmw = (1 << 0) | (1 << 1);
342 id->lpa = (1 << 0) | (1 << 1) | (1 << 2);
343 id->elpe = NVMET_ERROR_LOG_SLOTS - 1;
346 /* We support keep-alive timeout in granularity of seconds */
347 id->kas = cpu_to_le16(NVMET_KAS);
349 id->sqes = (0x6 << 4) | 0x6;
350 id->cqes = (0x4 << 4) | 0x4;
352 /* no enforcement soft-limit for maxcmd - pick arbitrary high value */
353 id->maxcmd = cpu_to_le16(NVMET_MAX_CMD);
355 id->nn = cpu_to_le32(ctrl->subsys->max_nsid);
356 id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES);
357 id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM |
358 NVME_CTRL_ONCS_WRITE_ZEROES);
360 /* XXX: don't report vwc if the underlying device is write through */
361 id->vwc = NVME_CTRL_VWC_PRESENT;
364 * We can't support atomic writes bigger than a LBA without support
365 * from the backend device.
370 id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */
371 if (ctrl->ops->has_keyed_sgls)
372 id->sgls |= cpu_to_le32(1 << 2);
373 if (req->port->inline_data_size)
374 id->sgls |= cpu_to_le32(1 << 20);
376 strlcpy(id->subnqn, ctrl->subsys->subsysnqn, sizeof(id->subnqn));
378 /* Max command capsule size is sqe + single page of in-capsule data */
379 id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) +
380 req->port->inline_data_size) / 16);
381 /* Max response capsule size is cqe */
382 id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16);
384 id->msdbd = ctrl->ops->msdbd;
386 id->anacap = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4);
387 id->anatt = 10; /* random value */
388 id->anagrpmax = cpu_to_le32(NVMET_MAX_ANAGRPS);
389 id->nanagrpid = cpu_to_le32(NVMET_MAX_ANAGRPS);
392 * Meh, we don't really support any power state. Fake up the same
393 * values that qemu does.
395 id->psd[0].max_power = cpu_to_le16(0x9c4);
396 id->psd[0].entry_lat = cpu_to_le32(0x10);
397 id->psd[0].exit_lat = cpu_to_le32(0x4);
399 id->nwpc = 1 << 0; /* write protect and no write protect */
401 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
405 nvmet_req_complete(req, status);
408 static void nvmet_execute_identify_ns(struct nvmet_req *req)
411 struct nvme_id_ns *id;
414 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
415 req->error_loc = offsetof(struct nvme_identify, nsid);
416 status = NVME_SC_INVALID_NS | NVME_SC_DNR;
420 id = kzalloc(sizeof(*id), GFP_KERNEL);
422 status = NVME_SC_INTERNAL;
426 /* return an all zeroed buffer if we can't find an active namespace */
427 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
432 * nuse = ncap = nsze isn't always true, but we have no way to find
433 * that out from the underlying device.
435 id->ncap = id->nsze = cpu_to_le64(ns->size >> ns->blksize_shift);
436 switch (req->port->ana_state[ns->anagrpid]) {
437 case NVME_ANA_INACCESSIBLE:
438 case NVME_ANA_PERSISTENT_LOSS:
446 * We just provide a single LBA format that matches what the
447 * underlying device reports.
453 * Our namespace might always be shared. Not just with other
454 * controllers, but also with any other user of the block device.
457 id->anagrpid = cpu_to_le32(ns->anagrpid);
459 memcpy(&id->nguid, &ns->nguid, sizeof(id->nguid));
461 id->lbaf[0].ds = ns->blksize_shift;
464 id->nsattr |= (1 << 0);
465 nvmet_put_namespace(ns);
467 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
470 nvmet_req_complete(req, status);
473 static void nvmet_execute_identify_nslist(struct nvmet_req *req)
475 static const int buf_size = NVME_IDENTIFY_DATA_SIZE;
476 struct nvmet_ctrl *ctrl = req->sq->ctrl;
478 u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid);
483 list = kzalloc(buf_size, GFP_KERNEL);
485 status = NVME_SC_INTERNAL;
490 list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) {
491 if (ns->nsid <= min_nsid)
493 list[i++] = cpu_to_le32(ns->nsid);
494 if (i == buf_size / sizeof(__le32))
499 status = nvmet_copy_to_sgl(req, 0, list, buf_size);
503 nvmet_req_complete(req, status);
506 static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len,
507 void *id, off_t *off)
509 struct nvme_ns_id_desc desc = {
515 status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc));
518 *off += sizeof(desc);
520 status = nvmet_copy_to_sgl(req, *off, id, len);
528 static void nvmet_execute_identify_desclist(struct nvmet_req *req)
534 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
536 req->error_loc = offsetof(struct nvme_identify, nsid);
537 status = NVME_SC_INVALID_NS | NVME_SC_DNR;
541 if (memchr_inv(&ns->uuid, 0, sizeof(ns->uuid))) {
542 status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID,
548 if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid))) {
549 status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID,
556 if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off,
557 off) != NVME_IDENTIFY_DATA_SIZE - off)
558 status = NVME_SC_INTERNAL | NVME_SC_DNR;
560 nvmet_put_namespace(ns);
562 nvmet_req_complete(req, status);
566 * A "minimum viable" abort implementation: the command is mandatory in the
567 * spec, but we are not required to do any useful work. We couldn't really
568 * do a useful abort, so don't bother even with waiting for the command
569 * to be exectuted and return immediately telling the command to abort
572 static void nvmet_execute_abort(struct nvmet_req *req)
574 nvmet_set_result(req, 1);
575 nvmet_req_complete(req, 0);
578 static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req)
583 status = nvmet_file_flush(req);
585 status = nvmet_bdev_flush(req);
588 pr_err("write protect flush failed nsid: %u\n", req->ns->nsid);
592 static u16 nvmet_set_feat_write_protect(struct nvmet_req *req)
594 u32 write_protect = le32_to_cpu(req->cmd->common.cdw11);
595 struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
596 u16 status = NVME_SC_FEATURE_NOT_CHANGEABLE;
598 req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->rw.nsid);
599 if (unlikely(!req->ns)) {
600 req->error_loc = offsetof(struct nvme_common_command, nsid);
604 mutex_lock(&subsys->lock);
605 switch (write_protect) {
606 case NVME_NS_WRITE_PROTECT:
607 req->ns->readonly = true;
608 status = nvmet_write_protect_flush_sync(req);
610 req->ns->readonly = false;
612 case NVME_NS_NO_WRITE_PROTECT:
613 req->ns->readonly = false;
621 nvmet_ns_changed(subsys, req->ns->nsid);
622 mutex_unlock(&subsys->lock);
626 u16 nvmet_set_feat_kato(struct nvmet_req *req)
628 u32 val32 = le32_to_cpu(req->cmd->common.cdw11);
630 req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000);
632 nvmet_set_result(req, req->sq->ctrl->kato);
637 u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask)
639 u32 val32 = le32_to_cpu(req->cmd->common.cdw11);
642 req->error_loc = offsetof(struct nvme_common_command, cdw11);
643 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
646 WRITE_ONCE(req->sq->ctrl->aen_enabled, val32);
647 nvmet_set_result(req, val32);
652 static void nvmet_execute_set_features(struct nvmet_req *req)
654 struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
655 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
658 switch (cdw10 & 0xff) {
659 case NVME_FEAT_NUM_QUEUES:
660 nvmet_set_result(req,
661 (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16));
664 status = nvmet_set_feat_kato(req);
666 case NVME_FEAT_ASYNC_EVENT:
667 status = nvmet_set_feat_async_event(req, NVMET_AEN_CFG_ALL);
669 case NVME_FEAT_HOST_ID:
670 status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
672 case NVME_FEAT_WRITE_PROTECT:
673 status = nvmet_set_feat_write_protect(req);
676 req->error_loc = offsetof(struct nvme_common_command, cdw10);
677 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
681 nvmet_req_complete(req, status);
684 static u16 nvmet_get_feat_write_protect(struct nvmet_req *req)
686 struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
689 req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->common.nsid);
691 req->error_loc = offsetof(struct nvme_common_command, nsid);
692 return NVME_SC_INVALID_NS | NVME_SC_DNR;
694 mutex_lock(&subsys->lock);
695 if (req->ns->readonly == true)
696 result = NVME_NS_WRITE_PROTECT;
698 result = NVME_NS_NO_WRITE_PROTECT;
699 nvmet_set_result(req, result);
700 mutex_unlock(&subsys->lock);
705 void nvmet_get_feat_kato(struct nvmet_req *req)
707 nvmet_set_result(req, req->sq->ctrl->kato * 1000);
710 void nvmet_get_feat_async_event(struct nvmet_req *req)
712 nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled));
715 static void nvmet_execute_get_features(struct nvmet_req *req)
717 struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
718 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
721 switch (cdw10 & 0xff) {
723 * These features are mandatory in the spec, but we don't
724 * have a useful way to implement them. We'll eventually
725 * need to come up with some fake values for these.
728 case NVME_FEAT_ARBITRATION:
730 case NVME_FEAT_POWER_MGMT:
732 case NVME_FEAT_TEMP_THRESH:
734 case NVME_FEAT_ERR_RECOVERY:
736 case NVME_FEAT_IRQ_COALESCE:
738 case NVME_FEAT_IRQ_CONFIG:
740 case NVME_FEAT_WRITE_ATOMIC:
743 case NVME_FEAT_ASYNC_EVENT:
744 nvmet_get_feat_async_event(req);
746 case NVME_FEAT_VOLATILE_WC:
747 nvmet_set_result(req, 1);
749 case NVME_FEAT_NUM_QUEUES:
750 nvmet_set_result(req,
751 (subsys->max_qid-1) | ((subsys->max_qid-1) << 16));
754 nvmet_get_feat_kato(req);
756 case NVME_FEAT_HOST_ID:
757 /* need 128-bit host identifier flag */
758 if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) {
760 offsetof(struct nvme_common_command, cdw11);
761 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
765 status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid,
766 sizeof(req->sq->ctrl->hostid));
768 case NVME_FEAT_WRITE_PROTECT:
769 status = nvmet_get_feat_write_protect(req);
773 offsetof(struct nvme_common_command, cdw10);
774 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
778 nvmet_req_complete(req, status);
781 void nvmet_execute_async_event(struct nvmet_req *req)
783 struct nvmet_ctrl *ctrl = req->sq->ctrl;
785 mutex_lock(&ctrl->lock);
786 if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) {
787 mutex_unlock(&ctrl->lock);
788 nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR);
791 ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req;
792 mutex_unlock(&ctrl->lock);
794 schedule_work(&ctrl->async_event_work);
797 void nvmet_execute_keep_alive(struct nvmet_req *req)
799 struct nvmet_ctrl *ctrl = req->sq->ctrl;
801 pr_debug("ctrl %d update keep-alive timer for %d secs\n",
802 ctrl->cntlid, ctrl->kato);
804 mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ);
805 nvmet_req_complete(req, 0);
808 u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
810 struct nvme_command *cmd = req->cmd;
813 ret = nvmet_check_ctrl_status(req, cmd);
817 switch (cmd->common.opcode) {
818 case nvme_admin_get_log_page:
819 req->data_len = nvmet_get_log_page_len(cmd);
821 switch (cmd->get_log_page.lid) {
823 req->execute = nvmet_execute_get_log_page_error;
826 req->execute = nvmet_execute_get_log_page_smart;
828 case NVME_LOG_FW_SLOT:
830 * We only support a single firmware slot which always
831 * is active, so we can zero out the whole firmware slot
832 * log and still claim to fully implement this mandatory
835 req->execute = nvmet_execute_get_log_page_noop;
837 case NVME_LOG_CHANGED_NS:
838 req->execute = nvmet_execute_get_log_changed_ns;
840 case NVME_LOG_CMD_EFFECTS:
841 req->execute = nvmet_execute_get_log_cmd_effects_ns;
844 req->execute = nvmet_execute_get_log_page_ana;
848 case nvme_admin_identify:
849 req->data_len = NVME_IDENTIFY_DATA_SIZE;
850 switch (cmd->identify.cns) {
852 req->execute = nvmet_execute_identify_ns;
854 case NVME_ID_CNS_CTRL:
855 req->execute = nvmet_execute_identify_ctrl;
857 case NVME_ID_CNS_NS_ACTIVE_LIST:
858 req->execute = nvmet_execute_identify_nslist;
860 case NVME_ID_CNS_NS_DESC_LIST:
861 req->execute = nvmet_execute_identify_desclist;
865 case nvme_admin_abort_cmd:
866 req->execute = nvmet_execute_abort;
869 case nvme_admin_set_features:
870 req->execute = nvmet_execute_set_features;
873 case nvme_admin_get_features:
874 req->execute = nvmet_execute_get_features;
877 case nvme_admin_async_event:
878 req->execute = nvmet_execute_async_event;
881 case nvme_admin_keep_alive:
882 req->execute = nvmet_execute_keep_alive;
887 pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode,
889 req->error_loc = offsetof(struct nvme_common_command, opcode);
890 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;