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Commit | Line | Data |
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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 | ||
8ab0805f CH |
35 | static void nvmet_execute_get_log_page_noop(struct nvmet_req *req) |
36 | { | |
37 | nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->data_len)); | |
38 | } | |
39 | ||
2d79c7dc CK |
40 | static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, |
41 | struct nvme_smart_log *slog) | |
42 | { | |
2d79c7dc CK |
43 | struct nvmet_ns *ns; |
44 | u64 host_reads, host_writes, data_units_read, data_units_written; | |
45 | ||
2d79c7dc CK |
46 | ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid); |
47 | if (!ns) { | |
b38b9054 | 48 | pr_err("nvmet : Could not find namespace id : %d\n", |
2d79c7dc | 49 | le32_to_cpu(req->cmd->get_log_page.nsid)); |
4185f25a | 50 | return NVME_SC_INVALID_NS; |
2d79c7dc CK |
51 | } |
52 | ||
d5eff33e CK |
53 | /* we don't have the right data for file backed ns */ |
54 | if (!ns->bdev) | |
55 | goto out; | |
56 | ||
2d79c7dc CK |
57 | host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]); |
58 | data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]); | |
59 | host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]); | |
60 | data_units_written = part_stat_read(ns->bdev->bd_part, sectors[WRITE]); | |
61 | ||
62 | put_unaligned_le64(host_reads, &slog->host_reads[0]); | |
63 | put_unaligned_le64(data_units_read, &slog->data_units_read[0]); | |
64 | put_unaligned_le64(host_writes, &slog->host_writes[0]); | |
65 | put_unaligned_le64(data_units_written, &slog->data_units_written[0]); | |
d5eff33e | 66 | out: |
2d79c7dc | 67 | nvmet_put_namespace(ns); |
4185f25a SG |
68 | |
69 | return NVME_SC_SUCCESS; | |
2d79c7dc CK |
70 | } |
71 | ||
72 | static u16 nvmet_get_smart_log_all(struct nvmet_req *req, | |
73 | struct nvme_smart_log *slog) | |
74 | { | |
2d79c7dc CK |
75 | u64 host_reads = 0, host_writes = 0; |
76 | u64 data_units_read = 0, data_units_written = 0; | |
77 | struct nvmet_ns *ns; | |
78 | struct nvmet_ctrl *ctrl; | |
79 | ||
2d79c7dc CK |
80 | ctrl = req->sq->ctrl; |
81 | ||
82 | rcu_read_lock(); | |
83 | list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { | |
d5eff33e CK |
84 | /* we don't have the right data for file backed ns */ |
85 | if (!ns->bdev) | |
86 | continue; | |
2d79c7dc CK |
87 | host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]); |
88 | data_units_read += | |
89 | part_stat_read(ns->bdev->bd_part, sectors[READ]); | |
90 | host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]); | |
91 | data_units_written += | |
92 | part_stat_read(ns->bdev->bd_part, sectors[WRITE]); | |
93 | ||
94 | } | |
95 | rcu_read_unlock(); | |
96 | ||
97 | put_unaligned_le64(host_reads, &slog->host_reads[0]); | |
98 | put_unaligned_le64(data_units_read, &slog->data_units_read[0]); | |
99 | put_unaligned_le64(host_writes, &slog->host_writes[0]); | |
100 | put_unaligned_le64(data_units_written, &slog->data_units_written[0]); | |
101 | ||
4185f25a | 102 | return NVME_SC_SUCCESS; |
2d79c7dc CK |
103 | } |
104 | ||
8ab0805f | 105 | static void nvmet_execute_get_log_page_smart(struct nvmet_req *req) |
a07b4970 | 106 | { |
8ab0805f CH |
107 | struct nvme_smart_log *log; |
108 | u16 status = NVME_SC_INTERNAL; | |
a07b4970 | 109 | |
8ab0805f | 110 | if (req->data_len != sizeof(*log)) |
a07b4970 | 111 | goto out; |
a07b4970 | 112 | |
8ab0805f CH |
113 | log = kzalloc(sizeof(*log), GFP_KERNEL); |
114 | if (!log) | |
115 | goto out; | |
a07b4970 | 116 | |
8ab0805f CH |
117 | if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL)) |
118 | status = nvmet_get_smart_log_all(req, log); | |
119 | else | |
120 | status = nvmet_get_smart_log_nsid(req, log); | |
121 | if (status) | |
c42d7a30 | 122 | goto out_free_log; |
a07b4970 | 123 | |
8ab0805f | 124 | status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); |
c42d7a30 CK |
125 | out_free_log: |
126 | kfree(log); | |
a07b4970 CH |
127 | out: |
128 | nvmet_req_complete(req, status); | |
129 | } | |
130 | ||
0866bf0c CK |
131 | static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) |
132 | { | |
133 | u16 status = NVME_SC_INTERNAL; | |
134 | struct nvme_effects_log *log; | |
135 | ||
136 | log = kzalloc(sizeof(*log), GFP_KERNEL); | |
137 | if (!log) | |
138 | goto out; | |
139 | ||
140 | log->acs[nvme_admin_get_log_page] = cpu_to_le32(1 << 0); | |
141 | log->acs[nvme_admin_identify] = cpu_to_le32(1 << 0); | |
142 | log->acs[nvme_admin_abort_cmd] = cpu_to_le32(1 << 0); | |
143 | log->acs[nvme_admin_set_features] = cpu_to_le32(1 << 0); | |
144 | log->acs[nvme_admin_get_features] = cpu_to_le32(1 << 0); | |
145 | log->acs[nvme_admin_async_event] = cpu_to_le32(1 << 0); | |
146 | log->acs[nvme_admin_keep_alive] = cpu_to_le32(1 << 0); | |
147 | ||
148 | log->iocs[nvme_cmd_read] = cpu_to_le32(1 << 0); | |
149 | log->iocs[nvme_cmd_write] = cpu_to_le32(1 << 0); | |
150 | log->iocs[nvme_cmd_flush] = cpu_to_le32(1 << 0); | |
151 | log->iocs[nvme_cmd_dsm] = cpu_to_le32(1 << 0); | |
152 | log->iocs[nvme_cmd_write_zeroes] = cpu_to_le32(1 << 0); | |
153 | ||
154 | status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); | |
155 | ||
156 | kfree(log); | |
157 | out: | |
158 | nvmet_req_complete(req, status); | |
159 | } | |
160 | ||
c16734ea CH |
161 | static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req) |
162 | { | |
163 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
164 | u16 status = NVME_SC_INTERNAL; | |
165 | size_t len; | |
166 | ||
167 | if (req->data_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32)) | |
168 | goto out; | |
169 | ||
170 | mutex_lock(&ctrl->lock); | |
171 | if (ctrl->nr_changed_ns == U32_MAX) | |
172 | len = sizeof(__le32); | |
173 | else | |
174 | len = ctrl->nr_changed_ns * sizeof(__le32); | |
175 | status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len); | |
176 | if (!status) | |
177 | status = nvmet_zero_sgl(req, len, req->data_len - len); | |
178 | ctrl->nr_changed_ns = 0; | |
55fdd6b6 | 179 | clear_bit(NVME_AEN_CFG_NS_ATTR, &ctrl->aen_masked); |
c16734ea CH |
180 | mutex_unlock(&ctrl->lock); |
181 | out: | |
182 | nvmet_req_complete(req, status); | |
183 | } | |
184 | ||
a07b4970 CH |
185 | static void nvmet_execute_identify_ctrl(struct nvmet_req *req) |
186 | { | |
187 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
188 | struct nvme_id_ctrl *id; | |
a07b4970 | 189 | u16 status = 0; |
42de82a8 | 190 | const char model[] = "Linux"; |
a07b4970 CH |
191 | |
192 | id = kzalloc(sizeof(*id), GFP_KERNEL); | |
193 | if (!id) { | |
194 | status = NVME_SC_INTERNAL; | |
195 | goto out; | |
196 | } | |
197 | ||
198 | /* XXX: figure out how to assign real vendors IDs. */ | |
199 | id->vid = 0; | |
200 | id->ssvid = 0; | |
201 | ||
c7399698 | 202 | memset(id->sn, ' ', sizeof(id->sn)); |
42de82a8 MW |
203 | bin2hex(id->sn, &ctrl->subsys->serial, |
204 | min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2)); | |
17c39d05 MW |
205 | memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' '); |
206 | memcpy_and_pad(id->fr, sizeof(id->fr), | |
207 | UTS_RELEASE, strlen(UTS_RELEASE), ' '); | |
a07b4970 | 208 | |
a07b4970 CH |
209 | id->rab = 6; |
210 | ||
211 | /* | |
212 | * XXX: figure out how we can assign a IEEE OUI, but until then | |
213 | * the safest is to leave it as zeroes. | |
214 | */ | |
215 | ||
216 | /* we support multiple ports and multiples hosts: */ | |
a446c084 | 217 | id->cmic = (1 << 0) | (1 << 1); |
a07b4970 CH |
218 | |
219 | /* no limit on data transfer sizes for now */ | |
220 | id->mdts = 0; | |
221 | id->cntlid = cpu_to_le16(ctrl->cntlid); | |
222 | id->ver = cpu_to_le32(ctrl->subsys->ver); | |
223 | ||
224 | /* XXX: figure out what to do about RTD3R/RTD3 */ | |
c86b8f7b | 225 | id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL); |
a07b4970 CH |
226 | id->ctratt = cpu_to_le32(1 << 0); |
227 | ||
228 | id->oacs = 0; | |
229 | ||
230 | /* | |
231 | * We don't really have a practical limit on the number of abort | |
232 | * comands. But we don't do anything useful for abort either, so | |
233 | * no point in allowing more abort commands than the spec requires. | |
234 | */ | |
235 | id->acl = 3; | |
236 | ||
237 | id->aerl = NVMET_ASYNC_EVENTS - 1; | |
238 | ||
239 | /* first slot is read-only, only one slot supported */ | |
240 | id->frmw = (1 << 0) | (1 << 1); | |
0866bf0c | 241 | id->lpa = (1 << 0) | (1 << 1) | (1 << 2); |
a07b4970 CH |
242 | id->elpe = NVMET_ERROR_LOG_SLOTS - 1; |
243 | id->npss = 0; | |
244 | ||
245 | /* We support keep-alive timeout in granularity of seconds */ | |
246 | id->kas = cpu_to_le16(NVMET_KAS); | |
247 | ||
248 | id->sqes = (0x6 << 4) | 0x6; | |
249 | id->cqes = (0x4 << 4) | 0x4; | |
250 | ||
251 | /* no enforcement soft-limit for maxcmd - pick arbitrary high value */ | |
252 | id->maxcmd = cpu_to_le16(NVMET_MAX_CMD); | |
253 | ||
254 | id->nn = cpu_to_le32(ctrl->subsys->max_nsid); | |
d2629209 CK |
255 | id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | |
256 | NVME_CTRL_ONCS_WRITE_ZEROES); | |
a07b4970 CH |
257 | |
258 | /* XXX: don't report vwc if the underlying device is write through */ | |
259 | id->vwc = NVME_CTRL_VWC_PRESENT; | |
260 | ||
261 | /* | |
262 | * We can't support atomic writes bigger than a LBA without support | |
263 | * from the backend device. | |
264 | */ | |
265 | id->awun = 0; | |
266 | id->awupf = 0; | |
267 | ||
268 | id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */ | |
269 | if (ctrl->ops->has_keyed_sgls) | |
270 | id->sgls |= cpu_to_le32(1 << 2); | |
271 | if (ctrl->ops->sqe_inline_size) | |
272 | id->sgls |= cpu_to_le32(1 << 20); | |
273 | ||
274 | strcpy(id->subnqn, ctrl->subsys->subsysnqn); | |
275 | ||
276 | /* Max command capsule size is sqe + single page of in-capsule data */ | |
277 | id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) + | |
278 | ctrl->ops->sqe_inline_size) / 16); | |
279 | /* Max response capsule size is cqe */ | |
280 | id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16); | |
281 | ||
282 | id->msdbd = ctrl->ops->msdbd; | |
283 | ||
284 | /* | |
285 | * Meh, we don't really support any power state. Fake up the same | |
286 | * values that qemu does. | |
287 | */ | |
288 | id->psd[0].max_power = cpu_to_le16(0x9c4); | |
289 | id->psd[0].entry_lat = cpu_to_le32(0x10); | |
290 | id->psd[0].exit_lat = cpu_to_le32(0x4); | |
291 | ||
292 | status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); | |
293 | ||
294 | kfree(id); | |
295 | out: | |
296 | nvmet_req_complete(req, status); | |
297 | } | |
298 | ||
299 | static void nvmet_execute_identify_ns(struct nvmet_req *req) | |
300 | { | |
301 | struct nvmet_ns *ns; | |
302 | struct nvme_id_ns *id; | |
303 | u16 status = 0; | |
304 | ||
f39ae471 | 305 | if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) { |
a07b4970 CH |
306 | status = NVME_SC_INVALID_NS | NVME_SC_DNR; |
307 | goto out; | |
308 | } | |
309 | ||
310 | id = kzalloc(sizeof(*id), GFP_KERNEL); | |
311 | if (!id) { | |
312 | status = NVME_SC_INTERNAL; | |
f39ae471 | 313 | goto out; |
a07b4970 CH |
314 | } |
315 | ||
f39ae471 CH |
316 | /* return an all zeroed buffer if we can't find an active namespace */ |
317 | ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid); | |
318 | if (!ns) | |
319 | goto done; | |
320 | ||
a07b4970 | 321 | /* |
18c53e40 | 322 | * nuse = ncap = nsze isn't always true, but we have no way to find |
a07b4970 CH |
323 | * that out from the underlying device. |
324 | */ | |
325 | id->ncap = id->nuse = id->nsze = | |
326 | cpu_to_le64(ns->size >> ns->blksize_shift); | |
327 | ||
328 | /* | |
329 | * We just provide a single LBA format that matches what the | |
330 | * underlying device reports. | |
331 | */ | |
332 | id->nlbaf = 0; | |
333 | id->flbas = 0; | |
334 | ||
335 | /* | |
336 | * Our namespace might always be shared. Not just with other | |
337 | * controllers, but also with any other user of the block device. | |
338 | */ | |
339 | id->nmic = (1 << 0); | |
340 | ||
341 | memcpy(&id->nguid, &ns->nguid, sizeof(uuid_le)); | |
342 | ||
343 | id->lbaf[0].ds = ns->blksize_shift; | |
344 | ||
f39ae471 CH |
345 | nvmet_put_namespace(ns); |
346 | done: | |
a07b4970 | 347 | status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); |
a07b4970 | 348 | kfree(id); |
a07b4970 CH |
349 | out: |
350 | nvmet_req_complete(req, status); | |
351 | } | |
352 | ||
353 | static void nvmet_execute_identify_nslist(struct nvmet_req *req) | |
354 | { | |
0add5e8e | 355 | static const int buf_size = NVME_IDENTIFY_DATA_SIZE; |
a07b4970 CH |
356 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
357 | struct nvmet_ns *ns; | |
358 | u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid); | |
359 | __le32 *list; | |
360 | u16 status = 0; | |
361 | int i = 0; | |
362 | ||
363 | list = kzalloc(buf_size, GFP_KERNEL); | |
364 | if (!list) { | |
365 | status = NVME_SC_INTERNAL; | |
366 | goto out; | |
367 | } | |
368 | ||
369 | rcu_read_lock(); | |
370 | list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { | |
371 | if (ns->nsid <= min_nsid) | |
372 | continue; | |
373 | list[i++] = cpu_to_le32(ns->nsid); | |
374 | if (i == buf_size / sizeof(__le32)) | |
375 | break; | |
376 | } | |
377 | rcu_read_unlock(); | |
378 | ||
379 | status = nvmet_copy_to_sgl(req, 0, list, buf_size); | |
380 | ||
381 | kfree(list); | |
382 | out: | |
383 | nvmet_req_complete(req, status); | |
384 | } | |
385 | ||
637dc0f3 JT |
386 | static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len, |
387 | void *id, off_t *off) | |
388 | { | |
389 | struct nvme_ns_id_desc desc = { | |
390 | .nidt = type, | |
391 | .nidl = len, | |
392 | }; | |
393 | u16 status; | |
394 | ||
395 | status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc)); | |
396 | if (status) | |
397 | return status; | |
398 | *off += sizeof(desc); | |
399 | ||
400 | status = nvmet_copy_to_sgl(req, *off, id, len); | |
401 | if (status) | |
402 | return status; | |
403 | *off += len; | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | static void nvmet_execute_identify_desclist(struct nvmet_req *req) | |
409 | { | |
410 | struct nvmet_ns *ns; | |
411 | u16 status = 0; | |
412 | off_t off = 0; | |
413 | ||
414 | ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid); | |
415 | if (!ns) { | |
416 | status = NVME_SC_INVALID_NS | NVME_SC_DNR; | |
417 | goto out; | |
418 | } | |
419 | ||
420 | if (memchr_inv(&ns->uuid, 0, sizeof(ns->uuid))) { | |
421 | status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID, | |
422 | NVME_NIDT_UUID_LEN, | |
423 | &ns->uuid, &off); | |
424 | if (status) | |
425 | goto out_put_ns; | |
426 | } | |
427 | if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid))) { | |
428 | status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID, | |
429 | NVME_NIDT_NGUID_LEN, | |
430 | &ns->nguid, &off); | |
431 | if (status) | |
432 | goto out_put_ns; | |
433 | } | |
434 | ||
435 | if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off, | |
436 | off) != NVME_IDENTIFY_DATA_SIZE - off) | |
437 | status = NVME_SC_INTERNAL | NVME_SC_DNR; | |
438 | out_put_ns: | |
439 | nvmet_put_namespace(ns); | |
440 | out: | |
441 | nvmet_req_complete(req, status); | |
442 | } | |
443 | ||
a07b4970 | 444 | /* |
18c53e40 | 445 | * A "minimum viable" abort implementation: the command is mandatory in the |
a07b4970 CH |
446 | * spec, but we are not required to do any useful work. We couldn't really |
447 | * do a useful abort, so don't bother even with waiting for the command | |
448 | * to be exectuted and return immediately telling the command to abort | |
449 | * wasn't found. | |
450 | */ | |
451 | static void nvmet_execute_abort(struct nvmet_req *req) | |
452 | { | |
453 | nvmet_set_result(req, 1); | |
454 | nvmet_req_complete(req, 0); | |
455 | } | |
456 | ||
457 | static void nvmet_execute_set_features(struct nvmet_req *req) | |
458 | { | |
459 | struct nvmet_subsys *subsys = req->sq->ctrl->subsys; | |
460 | u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]); | |
a07b4970 CH |
461 | u32 val32; |
462 | u16 status = 0; | |
463 | ||
28dd5cf7 | 464 | switch (cdw10 & 0xff) { |
a07b4970 CH |
465 | case NVME_FEAT_NUM_QUEUES: |
466 | nvmet_set_result(req, | |
467 | (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16)); | |
468 | break; | |
469 | case NVME_FEAT_KATO: | |
6c73f949 | 470 | val32 = le32_to_cpu(req->cmd->common.cdw10[1]); |
a07b4970 CH |
471 | req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); |
472 | nvmet_set_result(req, req->sq->ctrl->kato); | |
473 | break; | |
c86b8f7b CH |
474 | case NVME_FEAT_ASYNC_EVENT: |
475 | val32 = le32_to_cpu(req->cmd->common.cdw10[1]); | |
476 | if (val32 & ~NVMET_AEN_CFG_ALL) { | |
477 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; | |
478 | break; | |
479 | } | |
480 | ||
481 | WRITE_ONCE(req->sq->ctrl->aen_enabled, val32); | |
482 | nvmet_set_result(req, val32); | |
483 | break; | |
28dd5cf7 OM |
484 | case NVME_FEAT_HOST_ID: |
485 | status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; | |
486 | break; | |
a07b4970 CH |
487 | default: |
488 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; | |
489 | break; | |
490 | } | |
491 | ||
492 | nvmet_req_complete(req, status); | |
493 | } | |
494 | ||
495 | static void nvmet_execute_get_features(struct nvmet_req *req) | |
496 | { | |
497 | struct nvmet_subsys *subsys = req->sq->ctrl->subsys; | |
498 | u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]); | |
499 | u16 status = 0; | |
500 | ||
28dd5cf7 | 501 | switch (cdw10 & 0xff) { |
a07b4970 CH |
502 | /* |
503 | * These features are mandatory in the spec, but we don't | |
504 | * have a useful way to implement them. We'll eventually | |
505 | * need to come up with some fake values for these. | |
506 | */ | |
507 | #if 0 | |
508 | case NVME_FEAT_ARBITRATION: | |
509 | break; | |
510 | case NVME_FEAT_POWER_MGMT: | |
511 | break; | |
512 | case NVME_FEAT_TEMP_THRESH: | |
513 | break; | |
514 | case NVME_FEAT_ERR_RECOVERY: | |
515 | break; | |
516 | case NVME_FEAT_IRQ_COALESCE: | |
517 | break; | |
518 | case NVME_FEAT_IRQ_CONFIG: | |
519 | break; | |
520 | case NVME_FEAT_WRITE_ATOMIC: | |
521 | break; | |
c86b8f7b | 522 | #endif |
a07b4970 | 523 | case NVME_FEAT_ASYNC_EVENT: |
c86b8f7b | 524 | nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled)); |
a07b4970 | 525 | break; |
a07b4970 CH |
526 | case NVME_FEAT_VOLATILE_WC: |
527 | nvmet_set_result(req, 1); | |
528 | break; | |
529 | case NVME_FEAT_NUM_QUEUES: | |
530 | nvmet_set_result(req, | |
531 | (subsys->max_qid-1) | ((subsys->max_qid-1) << 16)); | |
532 | break; | |
533 | case NVME_FEAT_KATO: | |
534 | nvmet_set_result(req, req->sq->ctrl->kato * 1000); | |
535 | break; | |
28dd5cf7 OM |
536 | case NVME_FEAT_HOST_ID: |
537 | /* need 128-bit host identifier flag */ | |
538 | if (!(req->cmd->common.cdw10[1] & cpu_to_le32(1 << 0))) { | |
539 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; | |
540 | break; | |
541 | } | |
542 | ||
543 | status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid, | |
544 | sizeof(req->sq->ctrl->hostid)); | |
545 | break; | |
a07b4970 CH |
546 | default: |
547 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; | |
548 | break; | |
549 | } | |
550 | ||
551 | nvmet_req_complete(req, status); | |
552 | } | |
553 | ||
554 | static void nvmet_execute_async_event(struct nvmet_req *req) | |
555 | { | |
556 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
557 | ||
558 | mutex_lock(&ctrl->lock); | |
559 | if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) { | |
560 | mutex_unlock(&ctrl->lock); | |
561 | nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR); | |
562 | return; | |
563 | } | |
564 | ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req; | |
565 | mutex_unlock(&ctrl->lock); | |
566 | ||
567 | schedule_work(&ctrl->async_event_work); | |
568 | } | |
569 | ||
570 | static void nvmet_execute_keep_alive(struct nvmet_req *req) | |
571 | { | |
572 | struct nvmet_ctrl *ctrl = req->sq->ctrl; | |
573 | ||
574 | pr_debug("ctrl %d update keep-alive timer for %d secs\n", | |
575 | ctrl->cntlid, ctrl->kato); | |
576 | ||
577 | mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ); | |
578 | nvmet_req_complete(req, 0); | |
579 | } | |
580 | ||
64a0ca88 | 581 | u16 nvmet_parse_admin_cmd(struct nvmet_req *req) |
a07b4970 CH |
582 | { |
583 | struct nvme_command *cmd = req->cmd; | |
64a0ca88 | 584 | u16 ret; |
a07b4970 | 585 | |
64a0ca88 PP |
586 | ret = nvmet_check_ctrl_status(req, cmd); |
587 | if (unlikely(ret)) | |
588 | return ret; | |
a07b4970 CH |
589 | |
590 | switch (cmd->common.opcode) { | |
591 | case nvme_admin_get_log_page: | |
592 | req->data_len = nvmet_get_log_page_len(cmd); | |
593 | ||
594 | switch (cmd->get_log_page.lid) { | |
2ca0786d | 595 | case NVME_LOG_ERROR: |
8ab0805f CH |
596 | /* |
597 | * We currently never set the More bit in the status | |
598 | * field, so all error log entries are invalid and can | |
599 | * be zeroed out. This is called a minum viable | |
600 | * implementation (TM) of this mandatory log page. | |
601 | */ | |
602 | req->execute = nvmet_execute_get_log_page_noop; | |
603 | return 0; | |
2ca0786d | 604 | case NVME_LOG_SMART: |
8ab0805f CH |
605 | req->execute = nvmet_execute_get_log_page_smart; |
606 | return 0; | |
2ca0786d | 607 | case NVME_LOG_FW_SLOT: |
8ab0805f CH |
608 | /* |
609 | * We only support a single firmware slot which always | |
610 | * is active, so we can zero out the whole firmware slot | |
611 | * log and still claim to fully implement this mandatory | |
612 | * log page. | |
613 | */ | |
614 | req->execute = nvmet_execute_get_log_page_noop; | |
a07b4970 | 615 | return 0; |
c16734ea CH |
616 | case NVME_LOG_CHANGED_NS: |
617 | req->execute = nvmet_execute_get_log_changed_ns; | |
618 | return 0; | |
0866bf0c CK |
619 | case NVME_LOG_CMD_EFFECTS: |
620 | req->execute = nvmet_execute_get_log_cmd_effects_ns; | |
621 | return 0; | |
a07b4970 CH |
622 | } |
623 | break; | |
624 | case nvme_admin_identify: | |
0add5e8e | 625 | req->data_len = NVME_IDENTIFY_DATA_SIZE; |
986994a2 | 626 | switch (cmd->identify.cns) { |
e9c9346e | 627 | case NVME_ID_CNS_NS: |
a07b4970 CH |
628 | req->execute = nvmet_execute_identify_ns; |
629 | return 0; | |
e9c9346e | 630 | case NVME_ID_CNS_CTRL: |
a07b4970 CH |
631 | req->execute = nvmet_execute_identify_ctrl; |
632 | return 0; | |
e9c9346e | 633 | case NVME_ID_CNS_NS_ACTIVE_LIST: |
a07b4970 CH |
634 | req->execute = nvmet_execute_identify_nslist; |
635 | return 0; | |
637dc0f3 JT |
636 | case NVME_ID_CNS_NS_DESC_LIST: |
637 | req->execute = nvmet_execute_identify_desclist; | |
638 | return 0; | |
a07b4970 CH |
639 | } |
640 | break; | |
641 | case nvme_admin_abort_cmd: | |
642 | req->execute = nvmet_execute_abort; | |
643 | req->data_len = 0; | |
644 | return 0; | |
645 | case nvme_admin_set_features: | |
646 | req->execute = nvmet_execute_set_features; | |
647 | req->data_len = 0; | |
648 | return 0; | |
649 | case nvme_admin_get_features: | |
650 | req->execute = nvmet_execute_get_features; | |
651 | req->data_len = 0; | |
652 | return 0; | |
653 | case nvme_admin_async_event: | |
654 | req->execute = nvmet_execute_async_event; | |
655 | req->data_len = 0; | |
656 | return 0; | |
657 | case nvme_admin_keep_alive: | |
658 | req->execute = nvmet_execute_keep_alive; | |
659 | req->data_len = 0; | |
660 | return 0; | |
661 | } | |
662 | ||
64a0ca88 PP |
663 | pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode, |
664 | req->sq->qid); | |
a07b4970 CH |
665 | return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; |
666 | } |