]>
Commit | Line | Data |
---|---|---|
a07b4970 CH |
1 | /* |
2 | * NVMe admin command implementation. | |
3 | * Copyright (c) 2015-2016 HGST, a Western Digital Company. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
15 | #include <linux/module.h> | |
b2d09103 IM |
16 | #include <linux/rculist.h> |
17 | ||
a07b4970 | 18 | #include <generated/utsrelease.h> |
2d79c7dc | 19 | #include <asm/unaligned.h> |
a07b4970 CH |
20 | #include "nvmet.h" |
21 | ||
22 | u32 nvmet_get_log_page_len(struct nvme_command *cmd) | |
23 | { | |
24 | u32 len = le16_to_cpu(cmd->get_log_page.numdu); | |
25 | ||
26 | len <<= 16; | |
27 | len += le16_to_cpu(cmd->get_log_page.numdl); | |
28 | /* NUMD is a 0's based value */ | |
29 | len += 1; | |
30 | len *= sizeof(u32); | |
31 | ||
32 | return len; | |
33 | } | |
34 | ||
2d79c7dc CK |
35 | static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, |
36 | struct nvme_smart_log *slog) | |
37 | { | |
38 | u16 status; | |
39 | struct nvmet_ns *ns; | |
40 | u64 host_reads, host_writes, data_units_read, data_units_written; | |
41 | ||
42 | status = NVME_SC_SUCCESS; | |
43 | ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid); | |
44 | if (!ns) { | |
45 | status = NVME_SC_INVALID_NS; | |
b38b9054 | 46 | pr_err("nvmet : Could not find namespace id : %d\n", |
2d79c7dc CK |
47 | le32_to_cpu(req->cmd->get_log_page.nsid)); |
48 | goto out; | |
49 | } | |
50 | ||
51 | host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]); | |
52 | data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]); | |
53 | host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]); | |
54 | data_units_written = part_stat_read(ns->bdev->bd_part, sectors[WRITE]); | |
55 | ||
56 | put_unaligned_le64(host_reads, &slog->host_reads[0]); | |
57 | put_unaligned_le64(data_units_read, &slog->data_units_read[0]); | |
58 | put_unaligned_le64(host_writes, &slog->host_writes[0]); | |
59 | put_unaligned_le64(data_units_written, &slog->data_units_written[0]); | |
60 | nvmet_put_namespace(ns); | |
61 | out: | |
62 | return status; | |
63 | } | |
64 | ||
65 | static u16 nvmet_get_smart_log_all(struct nvmet_req *req, | |
66 | struct nvme_smart_log *slog) | |
67 | { | |
68 | u16 status; | |
69 | u64 host_reads = 0, host_writes = 0; | |
70 | u64 data_units_read = 0, data_units_written = 0; | |
71 | struct nvmet_ns *ns; | |
72 | struct nvmet_ctrl *ctrl; | |
73 | ||
74 | status = NVME_SC_SUCCESS; | |
75 | ctrl = req->sq->ctrl; | |
76 | ||
77 | rcu_read_lock(); | |
78 | list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { | |
79 | host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]); | |
80 | data_units_read += | |
81 | part_stat_read(ns->bdev->bd_part, sectors[READ]); | |
82 | host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]); | |
83 | data_units_written += | |
84 | part_stat_read(ns->bdev->bd_part, sectors[WRITE]); | |
85 | ||
86 | } | |
87 | rcu_read_unlock(); | |
88 | ||
89 | put_unaligned_le64(host_reads, &slog->host_reads[0]); | |
90 | put_unaligned_le64(data_units_read, &slog->data_units_read[0]); | |
91 | put_unaligned_le64(host_writes, &slog->host_writes[0]); | |
92 | put_unaligned_le64(data_units_written, &slog->data_units_written[0]); | |
93 | ||
94 | return status; | |
95 | } | |
96 | ||
97 | static u16 nvmet_get_smart_log(struct nvmet_req *req, | |
98 | struct nvme_smart_log *slog) | |
99 | { | |
100 | u16 status; | |
101 | ||
102 | WARN_ON(req == NULL || slog == NULL); | |
5ac5fcc6 | 103 | if (req->cmd->get_log_page.nsid == cpu_to_le32(0xFFFFFFFF)) |
2d79c7dc CK |
104 | status = nvmet_get_smart_log_all(req, slog); |
105 | else | |
106 | status = nvmet_get_smart_log_nsid(req, slog); | |
107 | return status; | |
108 | } | |
109 | ||
a07b4970 CH |
110 | static void nvmet_execute_get_log_page(struct nvmet_req *req) |
111 | { | |
2d79c7dc | 112 | struct nvme_smart_log *smart_log; |
a07b4970 CH |
113 | size_t data_len = nvmet_get_log_page_len(req->cmd); |
114 | void *buf; | |
115 | u16 status = 0; | |
116 | ||
117 | buf = kzalloc(data_len, GFP_KERNEL); | |
118 | if (!buf) { | |
119 | status = NVME_SC_INTERNAL; | |
120 | goto out; | |
121 | } | |
122 | ||
123 | switch (req->cmd->get_log_page.lid) { | |
124 | case 0x01: | |
125 | /* | |
126 | * We currently never set the More bit in the status field, | |
127 | * so all error log entries are invalid and can be zeroed out. | |
128 | * This is called a minum viable implementation (TM) of this | |
129 | * mandatory log page. | |
130 | */ | |
131 | break; | |
132 | case 0x02: | |
133 | /* | |
134 | * XXX: fill out actual smart log | |
135 | * | |
136 | * We might have a hard time coming up with useful values for | |
137 | * many of the fields, and even when we have useful data | |
138 | * available (e.g. units or commands read/written) those aren't | |
139 | * persistent over power loss. | |
140 | */ | |
2d79c7dc CK |
141 | if (data_len != sizeof(*smart_log)) { |
142 | status = NVME_SC_INTERNAL; | |
143 | goto err; | |
144 | } | |
145 | smart_log = buf; | |
146 | status = nvmet_get_smart_log(req, smart_log); | |
147 | if (status) { | |
148 | memset(buf, '\0', data_len); | |
149 | goto err; | |
150 | } | |
a07b4970 CH |
151 | break; |
152 | case 0x03: | |
153 | /* | |
154 | * We only support a single firmware slot which always is | |
155 | * active, so we can zero out the whole firmware slot log and | |
156 | * still claim to fully implement this mandatory log page. | |
157 | */ | |
158 | break; | |
159 | default: | |
160 | BUG(); | |
161 | } | |
162 | ||
163 | status = nvmet_copy_to_sgl(req, 0, buf, data_len); | |
164 | ||
2d79c7dc | 165 | err: |
a07b4970 CH |
166 | kfree(buf); |
167 | out: | |
168 | nvmet_req_complete(req, status); | |
169 | } | |
170 | ||
171 | static void nvmet_execute_identify_ctrl(struct nvmet_req *req) | |
172 | { | |
173 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
174 | struct nvme_id_ctrl *id; | |
a07b4970 CH |
175 | u16 status = 0; |
176 | ||
177 | id = kzalloc(sizeof(*id), GFP_KERNEL); | |
178 | if (!id) { | |
179 | status = NVME_SC_INTERNAL; | |
180 | goto out; | |
181 | } | |
182 | ||
183 | /* XXX: figure out how to assign real vendors IDs. */ | |
184 | id->vid = 0; | |
185 | id->ssvid = 0; | |
186 | ||
a07b4970 | 187 | memset(id->sn, ' ', sizeof(id->sn)); |
28b89118 | 188 | snprintf(id->sn, sizeof(id->sn), "%llx", ctrl->serial); |
a07b4970 CH |
189 | |
190 | memset(id->mn, ' ', sizeof(id->mn)); | |
191 | strncpy((char *)id->mn, "Linux", sizeof(id->mn)); | |
192 | ||
193 | memset(id->fr, ' ', sizeof(id->fr)); | |
194 | strncpy((char *)id->fr, UTS_RELEASE, sizeof(id->fr)); | |
195 | ||
196 | id->rab = 6; | |
197 | ||
198 | /* | |
199 | * XXX: figure out how we can assign a IEEE OUI, but until then | |
200 | * the safest is to leave it as zeroes. | |
201 | */ | |
202 | ||
203 | /* we support multiple ports and multiples hosts: */ | |
a446c084 | 204 | id->cmic = (1 << 0) | (1 << 1); |
a07b4970 CH |
205 | |
206 | /* no limit on data transfer sizes for now */ | |
207 | id->mdts = 0; | |
208 | id->cntlid = cpu_to_le16(ctrl->cntlid); | |
209 | id->ver = cpu_to_le32(ctrl->subsys->ver); | |
210 | ||
211 | /* XXX: figure out what to do about RTD3R/RTD3 */ | |
212 | id->oaes = cpu_to_le32(1 << 8); | |
213 | id->ctratt = cpu_to_le32(1 << 0); | |
214 | ||
215 | id->oacs = 0; | |
216 | ||
217 | /* | |
218 | * We don't really have a practical limit on the number of abort | |
219 | * comands. But we don't do anything useful for abort either, so | |
220 | * no point in allowing more abort commands than the spec requires. | |
221 | */ | |
222 | id->acl = 3; | |
223 | ||
224 | id->aerl = NVMET_ASYNC_EVENTS - 1; | |
225 | ||
226 | /* first slot is read-only, only one slot supported */ | |
227 | id->frmw = (1 << 0) | (1 << 1); | |
228 | id->lpa = (1 << 0) | (1 << 2); | |
229 | id->elpe = NVMET_ERROR_LOG_SLOTS - 1; | |
230 | id->npss = 0; | |
231 | ||
232 | /* We support keep-alive timeout in granularity of seconds */ | |
233 | id->kas = cpu_to_le16(NVMET_KAS); | |
234 | ||
235 | id->sqes = (0x6 << 4) | 0x6; | |
236 | id->cqes = (0x4 << 4) | 0x4; | |
237 | ||
238 | /* no enforcement soft-limit for maxcmd - pick arbitrary high value */ | |
239 | id->maxcmd = cpu_to_le16(NVMET_MAX_CMD); | |
240 | ||
241 | id->nn = cpu_to_le32(ctrl->subsys->max_nsid); | |
d2629209 CK |
242 | id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | |
243 | NVME_CTRL_ONCS_WRITE_ZEROES); | |
a07b4970 CH |
244 | |
245 | /* XXX: don't report vwc if the underlying device is write through */ | |
246 | id->vwc = NVME_CTRL_VWC_PRESENT; | |
247 | ||
248 | /* | |
249 | * We can't support atomic writes bigger than a LBA without support | |
250 | * from the backend device. | |
251 | */ | |
252 | id->awun = 0; | |
253 | id->awupf = 0; | |
254 | ||
255 | id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */ | |
256 | if (ctrl->ops->has_keyed_sgls) | |
257 | id->sgls |= cpu_to_le32(1 << 2); | |
258 | if (ctrl->ops->sqe_inline_size) | |
259 | id->sgls |= cpu_to_le32(1 << 20); | |
260 | ||
261 | strcpy(id->subnqn, ctrl->subsys->subsysnqn); | |
262 | ||
263 | /* Max command capsule size is sqe + single page of in-capsule data */ | |
264 | id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) + | |
265 | ctrl->ops->sqe_inline_size) / 16); | |
266 | /* Max response capsule size is cqe */ | |
267 | id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16); | |
268 | ||
269 | id->msdbd = ctrl->ops->msdbd; | |
270 | ||
271 | /* | |
272 | * Meh, we don't really support any power state. Fake up the same | |
273 | * values that qemu does. | |
274 | */ | |
275 | id->psd[0].max_power = cpu_to_le16(0x9c4); | |
276 | id->psd[0].entry_lat = cpu_to_le32(0x10); | |
277 | id->psd[0].exit_lat = cpu_to_le32(0x4); | |
278 | ||
279 | status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); | |
280 | ||
281 | kfree(id); | |
282 | out: | |
283 | nvmet_req_complete(req, status); | |
284 | } | |
285 | ||
286 | static void nvmet_execute_identify_ns(struct nvmet_req *req) | |
287 | { | |
288 | struct nvmet_ns *ns; | |
289 | struct nvme_id_ns *id; | |
290 | u16 status = 0; | |
291 | ||
292 | ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid); | |
293 | if (!ns) { | |
294 | status = NVME_SC_INVALID_NS | NVME_SC_DNR; | |
295 | goto out; | |
296 | } | |
297 | ||
298 | id = kzalloc(sizeof(*id), GFP_KERNEL); | |
299 | if (!id) { | |
300 | status = NVME_SC_INTERNAL; | |
301 | goto out_put_ns; | |
302 | } | |
303 | ||
304 | /* | |
305 | * nuse = ncap = nsze isn't aways true, but we have no way to find | |
306 | * that out from the underlying device. | |
307 | */ | |
308 | id->ncap = id->nuse = id->nsze = | |
309 | cpu_to_le64(ns->size >> ns->blksize_shift); | |
310 | ||
311 | /* | |
312 | * We just provide a single LBA format that matches what the | |
313 | * underlying device reports. | |
314 | */ | |
315 | id->nlbaf = 0; | |
316 | id->flbas = 0; | |
317 | ||
318 | /* | |
319 | * Our namespace might always be shared. Not just with other | |
320 | * controllers, but also with any other user of the block device. | |
321 | */ | |
322 | id->nmic = (1 << 0); | |
323 | ||
324 | memcpy(&id->nguid, &ns->nguid, sizeof(uuid_le)); | |
325 | ||
326 | id->lbaf[0].ds = ns->blksize_shift; | |
327 | ||
328 | status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); | |
329 | ||
330 | kfree(id); | |
331 | out_put_ns: | |
332 | nvmet_put_namespace(ns); | |
333 | out: | |
334 | nvmet_req_complete(req, status); | |
335 | } | |
336 | ||
337 | static void nvmet_execute_identify_nslist(struct nvmet_req *req) | |
338 | { | |
339 | static const int buf_size = 4096; | |
340 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
341 | struct nvmet_ns *ns; | |
342 | u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid); | |
343 | __le32 *list; | |
344 | u16 status = 0; | |
345 | int i = 0; | |
346 | ||
347 | list = kzalloc(buf_size, GFP_KERNEL); | |
348 | if (!list) { | |
349 | status = NVME_SC_INTERNAL; | |
350 | goto out; | |
351 | } | |
352 | ||
353 | rcu_read_lock(); | |
354 | list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { | |
355 | if (ns->nsid <= min_nsid) | |
356 | continue; | |
357 | list[i++] = cpu_to_le32(ns->nsid); | |
358 | if (i == buf_size / sizeof(__le32)) | |
359 | break; | |
360 | } | |
361 | rcu_read_unlock(); | |
362 | ||
363 | status = nvmet_copy_to_sgl(req, 0, list, buf_size); | |
364 | ||
365 | kfree(list); | |
366 | out: | |
367 | nvmet_req_complete(req, status); | |
368 | } | |
369 | ||
370 | /* | |
371 | * A "mimimum viable" abort implementation: the command is mandatory in the | |
372 | * spec, but we are not required to do any useful work. We couldn't really | |
373 | * do a useful abort, so don't bother even with waiting for the command | |
374 | * to be exectuted and return immediately telling the command to abort | |
375 | * wasn't found. | |
376 | */ | |
377 | static void nvmet_execute_abort(struct nvmet_req *req) | |
378 | { | |
379 | nvmet_set_result(req, 1); | |
380 | nvmet_req_complete(req, 0); | |
381 | } | |
382 | ||
383 | static void nvmet_execute_set_features(struct nvmet_req *req) | |
384 | { | |
385 | struct nvmet_subsys *subsys = req->sq->ctrl->subsys; | |
386 | u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]); | |
a07b4970 CH |
387 | u32 val32; |
388 | u16 status = 0; | |
389 | ||
390 | switch (cdw10 & 0xf) { | |
391 | case NVME_FEAT_NUM_QUEUES: | |
392 | nvmet_set_result(req, | |
393 | (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16)); | |
394 | break; | |
395 | case NVME_FEAT_KATO: | |
6c73f949 | 396 | val32 = le32_to_cpu(req->cmd->common.cdw10[1]); |
a07b4970 CH |
397 | req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); |
398 | nvmet_set_result(req, req->sq->ctrl->kato); | |
399 | break; | |
400 | default: | |
401 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; | |
402 | break; | |
403 | } | |
404 | ||
405 | nvmet_req_complete(req, status); | |
406 | } | |
407 | ||
408 | static void nvmet_execute_get_features(struct nvmet_req *req) | |
409 | { | |
410 | struct nvmet_subsys *subsys = req->sq->ctrl->subsys; | |
411 | u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]); | |
412 | u16 status = 0; | |
413 | ||
414 | switch (cdw10 & 0xf) { | |
415 | /* | |
416 | * These features are mandatory in the spec, but we don't | |
417 | * have a useful way to implement them. We'll eventually | |
418 | * need to come up with some fake values for these. | |
419 | */ | |
420 | #if 0 | |
421 | case NVME_FEAT_ARBITRATION: | |
422 | break; | |
423 | case NVME_FEAT_POWER_MGMT: | |
424 | break; | |
425 | case NVME_FEAT_TEMP_THRESH: | |
426 | break; | |
427 | case NVME_FEAT_ERR_RECOVERY: | |
428 | break; | |
429 | case NVME_FEAT_IRQ_COALESCE: | |
430 | break; | |
431 | case NVME_FEAT_IRQ_CONFIG: | |
432 | break; | |
433 | case NVME_FEAT_WRITE_ATOMIC: | |
434 | break; | |
435 | case NVME_FEAT_ASYNC_EVENT: | |
436 | break; | |
437 | #endif | |
438 | case NVME_FEAT_VOLATILE_WC: | |
439 | nvmet_set_result(req, 1); | |
440 | break; | |
441 | case NVME_FEAT_NUM_QUEUES: | |
442 | nvmet_set_result(req, | |
443 | (subsys->max_qid-1) | ((subsys->max_qid-1) << 16)); | |
444 | break; | |
445 | case NVME_FEAT_KATO: | |
446 | nvmet_set_result(req, req->sq->ctrl->kato * 1000); | |
447 | break; | |
448 | default: | |
449 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; | |
450 | break; | |
451 | } | |
452 | ||
453 | nvmet_req_complete(req, status); | |
454 | } | |
455 | ||
456 | static void nvmet_execute_async_event(struct nvmet_req *req) | |
457 | { | |
458 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
459 | ||
460 | mutex_lock(&ctrl->lock); | |
461 | if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) { | |
462 | mutex_unlock(&ctrl->lock); | |
463 | nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR); | |
464 | return; | |
465 | } | |
466 | ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req; | |
467 | mutex_unlock(&ctrl->lock); | |
468 | ||
469 | schedule_work(&ctrl->async_event_work); | |
470 | } | |
471 | ||
472 | static void nvmet_execute_keep_alive(struct nvmet_req *req) | |
473 | { | |
474 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
475 | ||
476 | pr_debug("ctrl %d update keep-alive timer for %d secs\n", | |
477 | ctrl->cntlid, ctrl->kato); | |
478 | ||
479 | mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ); | |
480 | nvmet_req_complete(req, 0); | |
481 | } | |
482 | ||
483 | int nvmet_parse_admin_cmd(struct nvmet_req *req) | |
484 | { | |
485 | struct nvme_command *cmd = req->cmd; | |
486 | ||
487 | req->ns = NULL; | |
488 | ||
489 | if (unlikely(!(req->sq->ctrl->cc & NVME_CC_ENABLE))) { | |
490 | pr_err("nvmet: got admin cmd %d while CC.EN == 0\n", | |
491 | cmd->common.opcode); | |
492 | return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; | |
493 | } | |
494 | if (unlikely(!(req->sq->ctrl->csts & NVME_CSTS_RDY))) { | |
495 | pr_err("nvmet: got admin cmd %d while CSTS.RDY == 0\n", | |
496 | cmd->common.opcode); | |
497 | return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; | |
498 | } | |
499 | ||
500 | switch (cmd->common.opcode) { | |
501 | case nvme_admin_get_log_page: | |
502 | req->data_len = nvmet_get_log_page_len(cmd); | |
503 | ||
504 | switch (cmd->get_log_page.lid) { | |
505 | case 0x01: | |
506 | case 0x02: | |
507 | case 0x03: | |
508 | req->execute = nvmet_execute_get_log_page; | |
509 | return 0; | |
510 | } | |
511 | break; | |
512 | case nvme_admin_identify: | |
513 | req->data_len = 4096; | |
986994a2 | 514 | switch (cmd->identify.cns) { |
e9c9346e | 515 | case NVME_ID_CNS_NS: |
a07b4970 CH |
516 | req->execute = nvmet_execute_identify_ns; |
517 | return 0; | |
e9c9346e | 518 | case NVME_ID_CNS_CTRL: |
a07b4970 CH |
519 | req->execute = nvmet_execute_identify_ctrl; |
520 | return 0; | |
e9c9346e | 521 | case NVME_ID_CNS_NS_ACTIVE_LIST: |
a07b4970 CH |
522 | req->execute = nvmet_execute_identify_nslist; |
523 | return 0; | |
524 | } | |
525 | break; | |
526 | case nvme_admin_abort_cmd: | |
527 | req->execute = nvmet_execute_abort; | |
528 | req->data_len = 0; | |
529 | return 0; | |
530 | case nvme_admin_set_features: | |
531 | req->execute = nvmet_execute_set_features; | |
532 | req->data_len = 0; | |
533 | return 0; | |
534 | case nvme_admin_get_features: | |
535 | req->execute = nvmet_execute_get_features; | |
536 | req->data_len = 0; | |
537 | return 0; | |
538 | case nvme_admin_async_event: | |
539 | req->execute = nvmet_execute_async_event; | |
540 | req->data_len = 0; | |
541 | return 0; | |
542 | case nvme_admin_keep_alive: | |
543 | req->execute = nvmet_execute_keep_alive; | |
544 | req->data_len = 0; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | pr_err("nvmet: unhandled cmd %d\n", cmd->common.opcode); | |
549 | return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; | |
550 | } |