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 <asm/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, status: nvmet_zero_sgl(req, off: 0, len: 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, off: offset, buf: &ctrl->slots[slot], |
61 | len: 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(lock: &ctrl->error_lock, flags); |
71 | nvmet_req_complete(req, status: 0); |
72 | } |
73 | |
74 | static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, |
75 | struct nvme_smart_log *slog) |
76 | { |
77 | u64 host_reads, host_writes, data_units_read, data_units_written; |
78 | u16 status; |
79 | |
80 | status = nvmet_req_find_ns(req); |
81 | if (status) |
82 | return status; |
83 | |
84 | /* we don't have the right data for file backed ns */ |
85 | if (!req->ns->bdev) |
86 | return NVME_SC_SUCCESS; |
87 | |
88 | host_reads = part_stat_read(req->ns->bdev, ios[READ]); |
89 | data_units_read = |
90 | DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[READ]), 1000); |
91 | host_writes = part_stat_read(req->ns->bdev, ios[WRITE]); |
92 | data_units_written = |
93 | DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[WRITE]), 1000); |
94 | |
95 | put_unaligned_le64(val: host_reads, p: &slog->host_reads[0]); |
96 | put_unaligned_le64(val: data_units_read, p: &slog->data_units_read[0]); |
97 | put_unaligned_le64(val: host_writes, p: &slog->host_writes[0]); |
98 | put_unaligned_le64(val: data_units_written, p: &slog->data_units_written[0]); |
99 | |
100 | return NVME_SC_SUCCESS; |
101 | } |
102 | |
103 | static u16 nvmet_get_smart_log_all(struct nvmet_req *req, |
104 | struct nvme_smart_log *slog) |
105 | { |
106 | u64 host_reads = 0, host_writes = 0; |
107 | u64 data_units_read = 0, data_units_written = 0; |
108 | struct nvmet_ns *ns; |
109 | struct nvmet_ctrl *ctrl; |
110 | unsigned long idx; |
111 | |
112 | ctrl = req->sq->ctrl; |
113 | xa_for_each(&ctrl->subsys->namespaces, idx, ns) { |
114 | /* we don't have the right data for file backed ns */ |
115 | if (!ns->bdev) |
116 | continue; |
117 | host_reads += part_stat_read(ns->bdev, ios[READ]); |
118 | data_units_read += DIV_ROUND_UP( |
119 | part_stat_read(ns->bdev, sectors[READ]), 1000); |
120 | host_writes += part_stat_read(ns->bdev, ios[WRITE]); |
121 | data_units_written += DIV_ROUND_UP( |
122 | part_stat_read(ns->bdev, sectors[WRITE]), 1000); |
123 | } |
124 | |
125 | put_unaligned_le64(val: host_reads, p: &slog->host_reads[0]); |
126 | put_unaligned_le64(val: data_units_read, p: &slog->data_units_read[0]); |
127 | put_unaligned_le64(val: host_writes, p: &slog->host_writes[0]); |
128 | put_unaligned_le64(val: data_units_written, p: &slog->data_units_written[0]); |
129 | |
130 | return NVME_SC_SUCCESS; |
131 | } |
132 | |
133 | static void nvmet_execute_get_log_page_smart(struct nvmet_req *req) |
134 | { |
135 | struct nvme_smart_log *log; |
136 | u16 status = NVME_SC_INTERNAL; |
137 | unsigned long flags; |
138 | |
139 | if (req->transfer_len != sizeof(*log)) |
140 | goto out; |
141 | |
142 | log = kzalloc(size: sizeof(*log), GFP_KERNEL); |
143 | if (!log) |
144 | goto out; |
145 | |
146 | if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL)) |
147 | status = nvmet_get_smart_log_all(req, slog: log); |
148 | else |
149 | status = nvmet_get_smart_log_nsid(req, slog: log); |
150 | if (status) |
151 | goto out_free_log; |
152 | |
153 | spin_lock_irqsave(&req->sq->ctrl->error_lock, flags); |
154 | put_unaligned_le64(val: req->sq->ctrl->err_counter, |
155 | p: &log->num_err_log_entries); |
156 | spin_unlock_irqrestore(lock: &req->sq->ctrl->error_lock, flags); |
157 | |
158 | status = nvmet_copy_to_sgl(req, off: 0, buf: log, len: sizeof(*log)); |
159 | out_free_log: |
160 | kfree(objp: log); |
161 | out: |
162 | nvmet_req_complete(req, status); |
163 | } |
164 | |
165 | static void nvmet_get_cmd_effects_nvm(struct nvme_effects_log *log) |
166 | { |
167 | log->acs[nvme_admin_get_log_page] = |
168 | log->acs[nvme_admin_identify] = |
169 | log->acs[nvme_admin_abort_cmd] = |
170 | log->acs[nvme_admin_set_features] = |
171 | log->acs[nvme_admin_get_features] = |
172 | log->acs[nvme_admin_async_event] = |
173 | log->acs[nvme_admin_keep_alive] = |
174 | cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); |
175 | |
176 | log->iocs[nvme_cmd_read] = |
177 | log->iocs[nvme_cmd_flush] = |
178 | log->iocs[nvme_cmd_dsm] = |
179 | cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); |
180 | log->iocs[nvme_cmd_write] = |
181 | log->iocs[nvme_cmd_write_zeroes] = |
182 | cpu_to_le32(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC); |
183 | } |
184 | |
185 | static void nvmet_get_cmd_effects_zns(struct nvme_effects_log *log) |
186 | { |
187 | log->iocs[nvme_cmd_zone_append] = |
188 | log->iocs[nvme_cmd_zone_mgmt_send] = |
189 | cpu_to_le32(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC); |
190 | log->iocs[nvme_cmd_zone_mgmt_recv] = |
191 | cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); |
192 | } |
193 | |
194 | static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) |
195 | { |
196 | struct nvme_effects_log *log; |
197 | u16 status = NVME_SC_SUCCESS; |
198 | |
199 | log = kzalloc(size: sizeof(*log), GFP_KERNEL); |
200 | if (!log) { |
201 | status = NVME_SC_INTERNAL; |
202 | goto out; |
203 | } |
204 | |
205 | switch (req->cmd->get_log_page.csi) { |
206 | case NVME_CSI_NVM: |
207 | nvmet_get_cmd_effects_nvm(log); |
208 | break; |
209 | case NVME_CSI_ZNS: |
210 | if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
211 | status = NVME_SC_INVALID_IO_CMD_SET; |
212 | goto free; |
213 | } |
214 | nvmet_get_cmd_effects_nvm(log); |
215 | nvmet_get_cmd_effects_zns(log); |
216 | break; |
217 | default: |
218 | status = NVME_SC_INVALID_LOG_PAGE; |
219 | goto free; |
220 | } |
221 | |
222 | status = nvmet_copy_to_sgl(req, off: 0, buf: log, len: sizeof(*log)); |
223 | free: |
224 | kfree(objp: log); |
225 | out: |
226 | nvmet_req_complete(req, status); |
227 | } |
228 | |
229 | static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req) |
230 | { |
231 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
232 | u16 status = NVME_SC_INTERNAL; |
233 | size_t len; |
234 | |
235 | if (req->transfer_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32)) |
236 | goto out; |
237 | |
238 | mutex_lock(&ctrl->lock); |
239 | if (ctrl->nr_changed_ns == U32_MAX) |
240 | len = sizeof(__le32); |
241 | else |
242 | len = ctrl->nr_changed_ns * sizeof(__le32); |
243 | status = nvmet_copy_to_sgl(req, off: 0, buf: ctrl->changed_ns_list, len); |
244 | if (!status) |
245 | status = nvmet_zero_sgl(req, off: len, len: req->transfer_len - len); |
246 | ctrl->nr_changed_ns = 0; |
247 | nvmet_clear_aen_bit(req, bn: NVME_AEN_BIT_NS_ATTR); |
248 | mutex_unlock(lock: &ctrl->lock); |
249 | out: |
250 | nvmet_req_complete(req, status); |
251 | } |
252 | |
253 | static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid, |
254 | struct nvme_ana_group_desc *desc) |
255 | { |
256 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
257 | struct nvmet_ns *ns; |
258 | unsigned long idx; |
259 | u32 count = 0; |
260 | |
261 | if (!(req->cmd->get_log_page.lsp & NVME_ANA_LOG_RGO)) { |
262 | xa_for_each(&ctrl->subsys->namespaces, idx, ns) |
263 | if (ns->anagrpid == grpid) |
264 | desc->nsids[count++] = cpu_to_le32(ns->nsid); |
265 | } |
266 | |
267 | desc->grpid = cpu_to_le32(grpid); |
268 | desc->nnsids = cpu_to_le32(count); |
269 | desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt); |
270 | desc->state = req->port->ana_state[grpid]; |
271 | memset(desc->rsvd17, 0, sizeof(desc->rsvd17)); |
272 | return struct_size(desc, nsids, count); |
273 | } |
274 | |
275 | static void nvmet_execute_get_log_page_ana(struct nvmet_req *req) |
276 | { |
277 | struct nvme_ana_rsp_hdr hdr = { 0, }; |
278 | struct nvme_ana_group_desc *desc; |
279 | size_t offset = sizeof(struct nvme_ana_rsp_hdr); /* start beyond hdr */ |
280 | size_t len; |
281 | u32 grpid; |
282 | u16 ngrps = 0; |
283 | u16 status; |
284 | |
285 | status = NVME_SC_INTERNAL; |
286 | desc = kmalloc(struct_size(desc, nsids, NVMET_MAX_NAMESPACES), |
287 | GFP_KERNEL); |
288 | if (!desc) |
289 | goto out; |
290 | |
291 | down_read(sem: &nvmet_ana_sem); |
292 | for (grpid = 1; grpid <= NVMET_MAX_ANAGRPS; grpid++) { |
293 | if (!nvmet_ana_group_enabled[grpid]) |
294 | continue; |
295 | len = nvmet_format_ana_group(req, grpid, desc); |
296 | status = nvmet_copy_to_sgl(req, off: offset, buf: desc, len); |
297 | if (status) |
298 | break; |
299 | offset += len; |
300 | ngrps++; |
301 | } |
302 | for ( ; grpid <= NVMET_MAX_ANAGRPS; grpid++) { |
303 | if (nvmet_ana_group_enabled[grpid]) |
304 | ngrps++; |
305 | } |
306 | |
307 | hdr.chgcnt = cpu_to_le64(nvmet_ana_chgcnt); |
308 | hdr.ngrps = cpu_to_le16(ngrps); |
309 | nvmet_clear_aen_bit(req, bn: NVME_AEN_BIT_ANA_CHANGE); |
310 | up_read(sem: &nvmet_ana_sem); |
311 | |
312 | kfree(objp: desc); |
313 | |
314 | /* copy the header last once we know the number of groups */ |
315 | status = nvmet_copy_to_sgl(req, off: 0, buf: &hdr, len: sizeof(hdr)); |
316 | out: |
317 | nvmet_req_complete(req, status); |
318 | } |
319 | |
320 | static void nvmet_execute_get_log_page(struct nvmet_req *req) |
321 | { |
322 | if (!nvmet_check_transfer_len(req, len: nvmet_get_log_page_len(cmd: req->cmd))) |
323 | return; |
324 | |
325 | switch (req->cmd->get_log_page.lid) { |
326 | case NVME_LOG_ERROR: |
327 | return nvmet_execute_get_log_page_error(req); |
328 | case NVME_LOG_SMART: |
329 | return nvmet_execute_get_log_page_smart(req); |
330 | case NVME_LOG_FW_SLOT: |
331 | /* |
332 | * We only support a single firmware slot which always is |
333 | * active, so we can zero out the whole firmware slot log and |
334 | * still claim to fully implement this mandatory log page. |
335 | */ |
336 | return nvmet_execute_get_log_page_noop(req); |
337 | case NVME_LOG_CHANGED_NS: |
338 | return nvmet_execute_get_log_changed_ns(req); |
339 | case NVME_LOG_CMD_EFFECTS: |
340 | return nvmet_execute_get_log_cmd_effects_ns(req); |
341 | case NVME_LOG_ANA: |
342 | return nvmet_execute_get_log_page_ana(req); |
343 | } |
344 | pr_debug("unhandled lid %d on qid %d\n" , |
345 | req->cmd->get_log_page.lid, req->sq->qid); |
346 | req->error_loc = offsetof(struct nvme_get_log_page_command, lid); |
347 | nvmet_req_complete(req, status: NVME_SC_INVALID_FIELD | NVME_SC_DNR); |
348 | } |
349 | |
350 | static void nvmet_execute_identify_ctrl(struct nvmet_req *req) |
351 | { |
352 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
353 | struct nvmet_subsys *subsys = ctrl->subsys; |
354 | struct nvme_id_ctrl *id; |
355 | u32 cmd_capsule_size; |
356 | u16 status = 0; |
357 | |
358 | if (!subsys->subsys_discovered) { |
359 | mutex_lock(&subsys->lock); |
360 | subsys->subsys_discovered = true; |
361 | mutex_unlock(lock: &subsys->lock); |
362 | } |
363 | |
364 | id = kzalloc(size: sizeof(*id), GFP_KERNEL); |
365 | if (!id) { |
366 | status = NVME_SC_INTERNAL; |
367 | goto out; |
368 | } |
369 | |
370 | /* XXX: figure out how to assign real vendors IDs. */ |
371 | id->vid = 0; |
372 | id->ssvid = 0; |
373 | |
374 | memcpy(id->sn, ctrl->subsys->serial, NVMET_SN_MAX_SIZE); |
375 | memcpy_and_pad(dest: id->mn, dest_len: sizeof(id->mn), src: subsys->model_number, |
376 | strlen(subsys->model_number), pad: ' '); |
377 | memcpy_and_pad(dest: id->fr, dest_len: sizeof(id->fr), |
378 | src: subsys->firmware_rev, strlen(subsys->firmware_rev), pad: ' '); |
379 | |
380 | put_unaligned_le24(val: subsys->ieee_oui, p: id->ieee); |
381 | |
382 | id->rab = 6; |
383 | |
384 | if (nvmet_is_disc_subsys(subsys: ctrl->subsys)) |
385 | id->cntrltype = NVME_CTRL_DISC; |
386 | else |
387 | id->cntrltype = NVME_CTRL_IO; |
388 | |
389 | /* we support multiple ports, multiples hosts and ANA: */ |
390 | id->cmic = NVME_CTRL_CMIC_MULTI_PORT | NVME_CTRL_CMIC_MULTI_CTRL | |
391 | NVME_CTRL_CMIC_ANA; |
392 | |
393 | /* Limit MDTS according to transport capability */ |
394 | if (ctrl->ops->get_mdts) |
395 | id->mdts = ctrl->ops->get_mdts(ctrl); |
396 | else |
397 | id->mdts = 0; |
398 | |
399 | id->cntlid = cpu_to_le16(ctrl->cntlid); |
400 | id->ver = cpu_to_le32(ctrl->subsys->ver); |
401 | |
402 | /* XXX: figure out what to do about RTD3R/RTD3 */ |
403 | id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL); |
404 | id->ctratt = cpu_to_le32(NVME_CTRL_ATTR_HID_128_BIT | |
405 | NVME_CTRL_ATTR_TBKAS); |
406 | |
407 | id->oacs = 0; |
408 | |
409 | /* |
410 | * We don't really have a practical limit on the number of abort |
411 | * comands. But we don't do anything useful for abort either, so |
412 | * no point in allowing more abort commands than the spec requires. |
413 | */ |
414 | id->acl = 3; |
415 | |
416 | id->aerl = NVMET_ASYNC_EVENTS - 1; |
417 | |
418 | /* first slot is read-only, only one slot supported */ |
419 | id->frmw = (1 << 0) | (1 << 1); |
420 | id->lpa = (1 << 0) | (1 << 1) | (1 << 2); |
421 | id->elpe = NVMET_ERROR_LOG_SLOTS - 1; |
422 | id->npss = 0; |
423 | |
424 | /* We support keep-alive timeout in granularity of seconds */ |
425 | id->kas = cpu_to_le16(NVMET_KAS); |
426 | |
427 | id->sqes = (0x6 << 4) | 0x6; |
428 | id->cqes = (0x4 << 4) | 0x4; |
429 | |
430 | /* no enforcement soft-limit for maxcmd - pick arbitrary high value */ |
431 | id->maxcmd = cpu_to_le16(NVMET_MAX_CMD); |
432 | |
433 | id->nn = cpu_to_le32(NVMET_MAX_NAMESPACES); |
434 | id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES); |
435 | id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | |
436 | NVME_CTRL_ONCS_WRITE_ZEROES); |
437 | |
438 | /* XXX: don't report vwc if the underlying device is write through */ |
439 | id->vwc = NVME_CTRL_VWC_PRESENT; |
440 | |
441 | /* |
442 | * We can't support atomic writes bigger than a LBA without support |
443 | * from the backend device. |
444 | */ |
445 | id->awun = 0; |
446 | id->awupf = 0; |
447 | |
448 | id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */ |
449 | if (ctrl->ops->flags & NVMF_KEYED_SGLS) |
450 | id->sgls |= cpu_to_le32(1 << 2); |
451 | if (req->port->inline_data_size) |
452 | id->sgls |= cpu_to_le32(1 << 20); |
453 | |
454 | strscpy(p: id->subnqn, q: ctrl->subsys->subsysnqn, size: sizeof(id->subnqn)); |
455 | |
456 | /* |
457 | * Max command capsule size is sqe + in-capsule data size. |
458 | * Disable in-capsule data for Metadata capable controllers. |
459 | */ |
460 | cmd_capsule_size = sizeof(struct nvme_command); |
461 | if (!ctrl->pi_support) |
462 | cmd_capsule_size += req->port->inline_data_size; |
463 | id->ioccsz = cpu_to_le32(cmd_capsule_size / 16); |
464 | |
465 | /* Max response capsule size is cqe */ |
466 | id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16); |
467 | |
468 | id->msdbd = ctrl->ops->msdbd; |
469 | |
470 | id->anacap = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4); |
471 | id->anatt = 10; /* random value */ |
472 | id->anagrpmax = cpu_to_le32(NVMET_MAX_ANAGRPS); |
473 | id->nanagrpid = cpu_to_le32(NVMET_MAX_ANAGRPS); |
474 | |
475 | /* |
476 | * Meh, we don't really support any power state. Fake up the same |
477 | * values that qemu does. |
478 | */ |
479 | id->psd[0].max_power = cpu_to_le16(0x9c4); |
480 | id->psd[0].entry_lat = cpu_to_le32(0x10); |
481 | id->psd[0].exit_lat = cpu_to_le32(0x4); |
482 | |
483 | id->nwpc = 1 << 0; /* write protect and no write protect */ |
484 | |
485 | status = nvmet_copy_to_sgl(req, off: 0, buf: id, len: sizeof(*id)); |
486 | |
487 | kfree(objp: id); |
488 | out: |
489 | nvmet_req_complete(req, status); |
490 | } |
491 | |
492 | static void nvmet_execute_identify_ns(struct nvmet_req *req) |
493 | { |
494 | struct nvme_id_ns *id; |
495 | u16 status; |
496 | |
497 | if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) { |
498 | req->error_loc = offsetof(struct nvme_identify, nsid); |
499 | status = NVME_SC_INVALID_NS | NVME_SC_DNR; |
500 | goto out; |
501 | } |
502 | |
503 | id = kzalloc(size: sizeof(*id), GFP_KERNEL); |
504 | if (!id) { |
505 | status = NVME_SC_INTERNAL; |
506 | goto out; |
507 | } |
508 | |
509 | /* return an all zeroed buffer if we can't find an active namespace */ |
510 | status = nvmet_req_find_ns(req); |
511 | if (status) { |
512 | status = 0; |
513 | goto done; |
514 | } |
515 | |
516 | if (nvmet_ns_revalidate(ns: req->ns)) { |
517 | mutex_lock(&req->ns->subsys->lock); |
518 | nvmet_ns_changed(subsys: req->ns->subsys, nsid: req->ns->nsid); |
519 | mutex_unlock(lock: &req->ns->subsys->lock); |
520 | } |
521 | |
522 | /* |
523 | * nuse = ncap = nsze isn't always true, but we have no way to find |
524 | * that out from the underlying device. |
525 | */ |
526 | id->ncap = id->nsze = |
527 | cpu_to_le64(req->ns->size >> req->ns->blksize_shift); |
528 | switch (req->port->ana_state[req->ns->anagrpid]) { |
529 | case NVME_ANA_INACCESSIBLE: |
530 | case NVME_ANA_PERSISTENT_LOSS: |
531 | break; |
532 | default: |
533 | id->nuse = id->nsze; |
534 | break; |
535 | } |
536 | |
537 | if (req->ns->bdev) |
538 | nvmet_bdev_set_limits(bdev: req->ns->bdev, id); |
539 | |
540 | /* |
541 | * We just provide a single LBA format that matches what the |
542 | * underlying device reports. |
543 | */ |
544 | id->nlbaf = 0; |
545 | id->flbas = 0; |
546 | |
547 | /* |
548 | * Our namespace might always be shared. Not just with other |
549 | * controllers, but also with any other user of the block device. |
550 | */ |
551 | id->nmic = NVME_NS_NMIC_SHARED; |
552 | id->anagrpid = cpu_to_le32(req->ns->anagrpid); |
553 | |
554 | memcpy(&id->nguid, &req->ns->nguid, sizeof(id->nguid)); |
555 | |
556 | id->lbaf[0].ds = req->ns->blksize_shift; |
557 | |
558 | if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(ns: req->ns)) { |
559 | id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST | |
560 | NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 | |
561 | NVME_NS_DPC_PI_TYPE3; |
562 | id->mc = NVME_MC_EXTENDED_LBA; |
563 | id->dps = req->ns->pi_type; |
564 | id->flbas = NVME_NS_FLBAS_META_EXT; |
565 | id->lbaf[0].ms = cpu_to_le16(req->ns->metadata_size); |
566 | } |
567 | |
568 | if (req->ns->readonly) |
569 | id->nsattr |= NVME_NS_ATTR_RO; |
570 | done: |
571 | if (!status) |
572 | status = nvmet_copy_to_sgl(req, off: 0, buf: id, len: sizeof(*id)); |
573 | |
574 | kfree(objp: id); |
575 | out: |
576 | nvmet_req_complete(req, status); |
577 | } |
578 | |
579 | static void nvmet_execute_identify_nslist(struct nvmet_req *req) |
580 | { |
581 | static const int buf_size = NVME_IDENTIFY_DATA_SIZE; |
582 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
583 | struct nvmet_ns *ns; |
584 | unsigned long idx; |
585 | u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid); |
586 | __le32 *list; |
587 | u16 status = 0; |
588 | int i = 0; |
589 | |
590 | list = kzalloc(size: buf_size, GFP_KERNEL); |
591 | if (!list) { |
592 | status = NVME_SC_INTERNAL; |
593 | goto out; |
594 | } |
595 | |
596 | xa_for_each(&ctrl->subsys->namespaces, idx, ns) { |
597 | if (ns->nsid <= min_nsid) |
598 | continue; |
599 | list[i++] = cpu_to_le32(ns->nsid); |
600 | if (i == buf_size / sizeof(__le32)) |
601 | break; |
602 | } |
603 | |
604 | status = nvmet_copy_to_sgl(req, off: 0, buf: list, len: buf_size); |
605 | |
606 | kfree(objp: list); |
607 | out: |
608 | nvmet_req_complete(req, status); |
609 | } |
610 | |
611 | static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len, |
612 | void *id, off_t *off) |
613 | { |
614 | struct nvme_ns_id_desc desc = { |
615 | .nidt = type, |
616 | .nidl = len, |
617 | }; |
618 | u16 status; |
619 | |
620 | status = nvmet_copy_to_sgl(req, off: *off, buf: &desc, len: sizeof(desc)); |
621 | if (status) |
622 | return status; |
623 | *off += sizeof(desc); |
624 | |
625 | status = nvmet_copy_to_sgl(req, off: *off, buf: id, len); |
626 | if (status) |
627 | return status; |
628 | *off += len; |
629 | |
630 | return 0; |
631 | } |
632 | |
633 | static void nvmet_execute_identify_desclist(struct nvmet_req *req) |
634 | { |
635 | off_t off = 0; |
636 | u16 status; |
637 | |
638 | status = nvmet_req_find_ns(req); |
639 | if (status) |
640 | goto out; |
641 | |
642 | if (memchr_inv(p: &req->ns->uuid, c: 0, size: sizeof(req->ns->uuid))) { |
643 | status = nvmet_copy_ns_identifier(req, type: NVME_NIDT_UUID, |
644 | NVME_NIDT_UUID_LEN, |
645 | id: &req->ns->uuid, off: &off); |
646 | if (status) |
647 | goto out; |
648 | } |
649 | if (memchr_inv(p: req->ns->nguid, c: 0, size: sizeof(req->ns->nguid))) { |
650 | status = nvmet_copy_ns_identifier(req, type: NVME_NIDT_NGUID, |
651 | NVME_NIDT_NGUID_LEN, |
652 | id: &req->ns->nguid, off: &off); |
653 | if (status) |
654 | goto out; |
655 | } |
656 | |
657 | status = nvmet_copy_ns_identifier(req, type: NVME_NIDT_CSI, |
658 | NVME_NIDT_CSI_LEN, |
659 | id: &req->ns->csi, off: &off); |
660 | if (status) |
661 | goto out; |
662 | |
663 | if (sg_zero_buffer(sgl: req->sg, nents: req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off, |
664 | skip: off) != NVME_IDENTIFY_DATA_SIZE - off) |
665 | status = NVME_SC_INTERNAL | NVME_SC_DNR; |
666 | |
667 | out: |
668 | nvmet_req_complete(req, status); |
669 | } |
670 | |
671 | static void nvmet_execute_identify_ctrl_nvm(struct nvmet_req *req) |
672 | { |
673 | /* Not supported: return zeroes */ |
674 | nvmet_req_complete(req, |
675 | status: nvmet_zero_sgl(req, off: 0, len: sizeof(struct nvme_id_ctrl_nvm))); |
676 | } |
677 | |
678 | static void nvmet_execute_identify(struct nvmet_req *req) |
679 | { |
680 | if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE)) |
681 | return; |
682 | |
683 | switch (req->cmd->identify.cns) { |
684 | case NVME_ID_CNS_NS: |
685 | nvmet_execute_identify_ns(req); |
686 | return; |
687 | case NVME_ID_CNS_CTRL: |
688 | nvmet_execute_identify_ctrl(req); |
689 | return; |
690 | case NVME_ID_CNS_NS_ACTIVE_LIST: |
691 | nvmet_execute_identify_nslist(req); |
692 | return; |
693 | case NVME_ID_CNS_NS_DESC_LIST: |
694 | nvmet_execute_identify_desclist(req); |
695 | return; |
696 | case NVME_ID_CNS_CS_NS: |
697 | switch (req->cmd->identify.csi) { |
698 | case NVME_CSI_NVM: |
699 | /* Not supported */ |
700 | break; |
701 | case NVME_CSI_ZNS: |
702 | if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
703 | nvmet_execute_identify_ns_zns(req); |
704 | return; |
705 | } |
706 | break; |
707 | } |
708 | break; |
709 | case NVME_ID_CNS_CS_CTRL: |
710 | switch (req->cmd->identify.csi) { |
711 | case NVME_CSI_NVM: |
712 | nvmet_execute_identify_ctrl_nvm(req); |
713 | return; |
714 | case NVME_CSI_ZNS: |
715 | if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
716 | nvmet_execute_identify_ctrl_zns(req); |
717 | return; |
718 | } |
719 | break; |
720 | } |
721 | break; |
722 | } |
723 | |
724 | pr_debug("unhandled identify cns %d on qid %d\n" , |
725 | req->cmd->identify.cns, req->sq->qid); |
726 | req->error_loc = offsetof(struct nvme_identify, cns); |
727 | nvmet_req_complete(req, status: NVME_SC_INVALID_FIELD | NVME_SC_DNR); |
728 | } |
729 | |
730 | /* |
731 | * A "minimum viable" abort implementation: the command is mandatory in the |
732 | * spec, but we are not required to do any useful work. We couldn't really |
733 | * do a useful abort, so don't bother even with waiting for the command |
734 | * to be exectuted and return immediately telling the command to abort |
735 | * wasn't found. |
736 | */ |
737 | static void nvmet_execute_abort(struct nvmet_req *req) |
738 | { |
739 | if (!nvmet_check_transfer_len(req, len: 0)) |
740 | return; |
741 | nvmet_set_result(req, result: 1); |
742 | nvmet_req_complete(req, status: 0); |
743 | } |
744 | |
745 | static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req) |
746 | { |
747 | u16 status; |
748 | |
749 | if (req->ns->file) |
750 | status = nvmet_file_flush(req); |
751 | else |
752 | status = nvmet_bdev_flush(req); |
753 | |
754 | if (status) |
755 | pr_err("write protect flush failed nsid: %u\n" , req->ns->nsid); |
756 | return status; |
757 | } |
758 | |
759 | static u16 nvmet_set_feat_write_protect(struct nvmet_req *req) |
760 | { |
761 | u32 write_protect = le32_to_cpu(req->cmd->common.cdw11); |
762 | struct nvmet_subsys *subsys = nvmet_req_subsys(req); |
763 | u16 status; |
764 | |
765 | status = nvmet_req_find_ns(req); |
766 | if (status) |
767 | return status; |
768 | |
769 | mutex_lock(&subsys->lock); |
770 | switch (write_protect) { |
771 | case NVME_NS_WRITE_PROTECT: |
772 | req->ns->readonly = true; |
773 | status = nvmet_write_protect_flush_sync(req); |
774 | if (status) |
775 | req->ns->readonly = false; |
776 | break; |
777 | case NVME_NS_NO_WRITE_PROTECT: |
778 | req->ns->readonly = false; |
779 | status = 0; |
780 | break; |
781 | default: |
782 | break; |
783 | } |
784 | |
785 | if (!status) |
786 | nvmet_ns_changed(subsys, nsid: req->ns->nsid); |
787 | mutex_unlock(lock: &subsys->lock); |
788 | return status; |
789 | } |
790 | |
791 | u16 nvmet_set_feat_kato(struct nvmet_req *req) |
792 | { |
793 | u32 val32 = le32_to_cpu(req->cmd->common.cdw11); |
794 | |
795 | nvmet_stop_keep_alive_timer(ctrl: req->sq->ctrl); |
796 | req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); |
797 | nvmet_start_keep_alive_timer(ctrl: req->sq->ctrl); |
798 | |
799 | nvmet_set_result(req, result: req->sq->ctrl->kato); |
800 | |
801 | return 0; |
802 | } |
803 | |
804 | u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask) |
805 | { |
806 | u32 val32 = le32_to_cpu(req->cmd->common.cdw11); |
807 | |
808 | if (val32 & ~mask) { |
809 | req->error_loc = offsetof(struct nvme_common_command, cdw11); |
810 | return NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
811 | } |
812 | |
813 | WRITE_ONCE(req->sq->ctrl->aen_enabled, val32); |
814 | nvmet_set_result(req, result: val32); |
815 | |
816 | return 0; |
817 | } |
818 | |
819 | void nvmet_execute_set_features(struct nvmet_req *req) |
820 | { |
821 | struct nvmet_subsys *subsys = nvmet_req_subsys(req); |
822 | u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); |
823 | u32 cdw11 = le32_to_cpu(req->cmd->common.cdw11); |
824 | u16 status = 0; |
825 | u16 nsqr; |
826 | u16 ncqr; |
827 | |
828 | if (!nvmet_check_data_len_lte(req, data_len: 0)) |
829 | return; |
830 | |
831 | switch (cdw10 & 0xff) { |
832 | case NVME_FEAT_NUM_QUEUES: |
833 | ncqr = (cdw11 >> 16) & 0xffff; |
834 | nsqr = cdw11 & 0xffff; |
835 | if (ncqr == 0xffff || nsqr == 0xffff) { |
836 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
837 | break; |
838 | } |
839 | nvmet_set_result(req, |
840 | result: (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16)); |
841 | break; |
842 | case NVME_FEAT_KATO: |
843 | status = nvmet_set_feat_kato(req); |
844 | break; |
845 | case NVME_FEAT_ASYNC_EVENT: |
846 | status = nvmet_set_feat_async_event(req, NVMET_AEN_CFG_ALL); |
847 | break; |
848 | case NVME_FEAT_HOST_ID: |
849 | status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; |
850 | break; |
851 | case NVME_FEAT_WRITE_PROTECT: |
852 | status = nvmet_set_feat_write_protect(req); |
853 | break; |
854 | default: |
855 | req->error_loc = offsetof(struct nvme_common_command, cdw10); |
856 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
857 | break; |
858 | } |
859 | |
860 | nvmet_req_complete(req, status); |
861 | } |
862 | |
863 | static u16 nvmet_get_feat_write_protect(struct nvmet_req *req) |
864 | { |
865 | struct nvmet_subsys *subsys = nvmet_req_subsys(req); |
866 | u32 result; |
867 | |
868 | result = nvmet_req_find_ns(req); |
869 | if (result) |
870 | return result; |
871 | |
872 | mutex_lock(&subsys->lock); |
873 | if (req->ns->readonly == true) |
874 | result = NVME_NS_WRITE_PROTECT; |
875 | else |
876 | result = NVME_NS_NO_WRITE_PROTECT; |
877 | nvmet_set_result(req, result); |
878 | mutex_unlock(lock: &subsys->lock); |
879 | |
880 | return 0; |
881 | } |
882 | |
883 | void nvmet_get_feat_kato(struct nvmet_req *req) |
884 | { |
885 | nvmet_set_result(req, result: req->sq->ctrl->kato * 1000); |
886 | } |
887 | |
888 | void nvmet_get_feat_async_event(struct nvmet_req *req) |
889 | { |
890 | nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled)); |
891 | } |
892 | |
893 | void nvmet_execute_get_features(struct nvmet_req *req) |
894 | { |
895 | struct nvmet_subsys *subsys = nvmet_req_subsys(req); |
896 | u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); |
897 | u16 status = 0; |
898 | |
899 | if (!nvmet_check_transfer_len(req, len: nvmet_feat_data_len(req, cdw10))) |
900 | return; |
901 | |
902 | switch (cdw10 & 0xff) { |
903 | /* |
904 | * These features are mandatory in the spec, but we don't |
905 | * have a useful way to implement them. We'll eventually |
906 | * need to come up with some fake values for these. |
907 | */ |
908 | #if 0 |
909 | case NVME_FEAT_ARBITRATION: |
910 | break; |
911 | case NVME_FEAT_POWER_MGMT: |
912 | break; |
913 | case NVME_FEAT_TEMP_THRESH: |
914 | break; |
915 | case NVME_FEAT_ERR_RECOVERY: |
916 | break; |
917 | case NVME_FEAT_IRQ_COALESCE: |
918 | break; |
919 | case NVME_FEAT_IRQ_CONFIG: |
920 | break; |
921 | case NVME_FEAT_WRITE_ATOMIC: |
922 | break; |
923 | #endif |
924 | case NVME_FEAT_ASYNC_EVENT: |
925 | nvmet_get_feat_async_event(req); |
926 | break; |
927 | case NVME_FEAT_VOLATILE_WC: |
928 | nvmet_set_result(req, result: 1); |
929 | break; |
930 | case NVME_FEAT_NUM_QUEUES: |
931 | nvmet_set_result(req, |
932 | result: (subsys->max_qid-1) | ((subsys->max_qid-1) << 16)); |
933 | break; |
934 | case NVME_FEAT_KATO: |
935 | nvmet_get_feat_kato(req); |
936 | break; |
937 | case NVME_FEAT_HOST_ID: |
938 | /* need 128-bit host identifier flag */ |
939 | if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) { |
940 | req->error_loc = |
941 | offsetof(struct nvme_common_command, cdw11); |
942 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
943 | break; |
944 | } |
945 | |
946 | status = nvmet_copy_to_sgl(req, off: 0, buf: &req->sq->ctrl->hostid, |
947 | len: sizeof(req->sq->ctrl->hostid)); |
948 | break; |
949 | case NVME_FEAT_WRITE_PROTECT: |
950 | status = nvmet_get_feat_write_protect(req); |
951 | break; |
952 | default: |
953 | req->error_loc = |
954 | offsetof(struct nvme_common_command, cdw10); |
955 | status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
956 | break; |
957 | } |
958 | |
959 | nvmet_req_complete(req, status); |
960 | } |
961 | |
962 | void nvmet_execute_async_event(struct nvmet_req *req) |
963 | { |
964 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
965 | |
966 | if (!nvmet_check_transfer_len(req, len: 0)) |
967 | return; |
968 | |
969 | mutex_lock(&ctrl->lock); |
970 | if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) { |
971 | mutex_unlock(lock: &ctrl->lock); |
972 | nvmet_req_complete(req, status: NVME_SC_ASYNC_LIMIT | NVME_SC_DNR); |
973 | return; |
974 | } |
975 | ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req; |
976 | mutex_unlock(lock: &ctrl->lock); |
977 | |
978 | queue_work(wq: nvmet_wq, work: &ctrl->async_event_work); |
979 | } |
980 | |
981 | void nvmet_execute_keep_alive(struct nvmet_req *req) |
982 | { |
983 | struct nvmet_ctrl *ctrl = req->sq->ctrl; |
984 | u16 status = 0; |
985 | |
986 | if (!nvmet_check_transfer_len(req, len: 0)) |
987 | return; |
988 | |
989 | if (!ctrl->kato) { |
990 | status = NVME_SC_KA_TIMEOUT_INVALID; |
991 | goto out; |
992 | } |
993 | |
994 | pr_debug("ctrl %d update keep-alive timer for %d secs\n" , |
995 | ctrl->cntlid, ctrl->kato); |
996 | mod_delayed_work(wq: system_wq, dwork: &ctrl->ka_work, delay: ctrl->kato * HZ); |
997 | out: |
998 | nvmet_req_complete(req, status); |
999 | } |
1000 | |
1001 | u16 nvmet_parse_admin_cmd(struct nvmet_req *req) |
1002 | { |
1003 | struct nvme_command *cmd = req->cmd; |
1004 | u16 ret; |
1005 | |
1006 | if (nvme_is_fabrics(cmd)) |
1007 | return nvmet_parse_fabrics_admin_cmd(req); |
1008 | if (unlikely(!nvmet_check_auth_status(req))) |
1009 | return NVME_SC_AUTH_REQUIRED | NVME_SC_DNR; |
1010 | if (nvmet_is_disc_subsys(subsys: nvmet_req_subsys(req))) |
1011 | return nvmet_parse_discovery_cmd(req); |
1012 | |
1013 | ret = nvmet_check_ctrl_status(req); |
1014 | if (unlikely(ret)) |
1015 | return ret; |
1016 | |
1017 | if (nvmet_is_passthru_req(req)) |
1018 | return nvmet_parse_passthru_admin_cmd(req); |
1019 | |
1020 | switch (cmd->common.opcode) { |
1021 | case nvme_admin_get_log_page: |
1022 | req->execute = nvmet_execute_get_log_page; |
1023 | return 0; |
1024 | case nvme_admin_identify: |
1025 | req->execute = nvmet_execute_identify; |
1026 | return 0; |
1027 | case nvme_admin_abort_cmd: |
1028 | req->execute = nvmet_execute_abort; |
1029 | return 0; |
1030 | case nvme_admin_set_features: |
1031 | req->execute = nvmet_execute_set_features; |
1032 | return 0; |
1033 | case nvme_admin_get_features: |
1034 | req->execute = nvmet_execute_get_features; |
1035 | return 0; |
1036 | case nvme_admin_async_event: |
1037 | req->execute = nvmet_execute_async_event; |
1038 | return 0; |
1039 | case nvme_admin_keep_alive: |
1040 | req->execute = nvmet_execute_keep_alive; |
1041 | return 0; |
1042 | default: |
1043 | return nvmet_report_invalid_opcode(req); |
1044 | } |
1045 | } |
1046 | |