1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * NVMe ZNS-ZBD command implementation.
4 * Copyright (C) 2021 Western Digital Corporation or its affiliates.
5 */
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/nvme.h>
8 #include <linux/blkdev.h>
9 #include "nvmet.h"
10
11 /*
12 * We set the Memory Page Size Minimum (MPSMIN) for target controller to 0
13 * which gets added by 12 in the nvme_enable_ctrl() which results in 2^12 = 4k
14 * as page_shift value. When calculating the ZASL use shift by 12.
15 */
16 #define NVMET_MPSMIN_SHIFT 12
17
nvmet_zasl(unsigned int zone_append_sects)18 static inline u8 nvmet_zasl(unsigned int zone_append_sects)
19 {
20 /*
21 * Zone Append Size Limit (zasl) is expressed as a power of 2 value
22 * with the minimum memory page size (i.e. 12) as unit.
23 */
24 return ilog2(zone_append_sects >> (NVMET_MPSMIN_SHIFT - 9));
25 }
26
validate_conv_zones_cb(struct blk_zone * z,unsigned int i,void * data)27 static int validate_conv_zones_cb(struct blk_zone *z,
28 unsigned int i, void *data)
29 {
30 if (z->type == BLK_ZONE_TYPE_CONVENTIONAL)
31 return -EOPNOTSUPP;
32 return 0;
33 }
34
nvmet_bdev_zns_enable(struct nvmet_ns * ns)35 bool nvmet_bdev_zns_enable(struct nvmet_ns *ns)
36 {
37 u8 zasl = nvmet_zasl(bdev_max_zone_append_sectors(ns->bdev));
38 struct gendisk *bd_disk = ns->bdev->bd_disk;
39 int ret;
40
41 if (ns->subsys->zasl) {
42 if (ns->subsys->zasl > zasl)
43 return false;
44 }
45 ns->subsys->zasl = zasl;
46
47 /*
48 * Generic zoned block devices may have a smaller last zone which is
49 * not supported by ZNS. Exclude zoned drives that have such smaller
50 * last zone.
51 */
52 if (get_capacity(bd_disk) & (bdev_zone_sectors(ns->bdev) - 1))
53 return false;
54 /*
55 * ZNS does not define a conventional zone type. Use report zones
56 * to detect if the device has conventional zones and reject it if
57 * it does.
58 */
59 ret = blkdev_report_zones(ns->bdev, 0, bdev_nr_zones(ns->bdev),
60 validate_conv_zones_cb, NULL);
61 if (ret < 0)
62 return false;
63
64 ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev));
65
66 return true;
67 }
68
nvmet_execute_identify_ctrl_zns(struct nvmet_req * req)69 void nvmet_execute_identify_ctrl_zns(struct nvmet_req *req)
70 {
71 u8 zasl = req->sq->ctrl->subsys->zasl;
72 struct nvme_id_ctrl_zns *id;
73 u16 status;
74
75 id = kzalloc_obj(*id);
76 if (!id) {
77 status = NVME_SC_INTERNAL;
78 goto out;
79 }
80
81 id->zasl = min_not_zero(nvmet_ctrl_mdts(req), zasl);
82
83 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
84
85 kfree(id);
86 out:
87 nvmet_req_complete(req, status);
88 }
89
nvmet_execute_identify_ns_zns(struct nvmet_req * req)90 void nvmet_execute_identify_ns_zns(struct nvmet_req *req)
91 {
92 struct nvme_id_ns_zns *id_zns = NULL;
93 u64 zsze;
94 u16 status;
95 u32 mar, mor;
96
97 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
98 req->error_loc = offsetof(struct nvme_identify, nsid);
99 status = NVME_SC_INVALID_NS | NVME_STATUS_DNR;
100 goto out;
101 }
102
103 id_zns = kzalloc_obj(*id_zns);
104 if (!id_zns) {
105 status = NVME_SC_INTERNAL;
106 goto out;
107 }
108
109 status = nvmet_req_find_ns(req);
110 if (status)
111 goto done;
112
113 if (nvmet_ns_revalidate(req->ns)) {
114 mutex_lock(&req->ns->subsys->lock);
115 nvmet_ns_changed(req->ns->subsys, req->ns->nsid);
116 mutex_unlock(&req->ns->subsys->lock);
117 }
118
119 if (!req->ns->bdev || !bdev_is_zoned(req->ns->bdev)) {
120 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
121 req->error_loc = offsetof(struct nvme_identify, nsid);
122 goto out;
123 }
124
125 zsze = (bdev_zone_sectors(req->ns->bdev) << 9) >>
126 req->ns->blksize_shift;
127 id_zns->lbafe[0].zsze = cpu_to_le64(zsze);
128
129 mor = bdev_max_open_zones(req->ns->bdev);
130 if (!mor)
131 mor = U32_MAX;
132 else
133 mor--;
134 id_zns->mor = cpu_to_le32(mor);
135
136 mar = bdev_max_active_zones(req->ns->bdev);
137 if (!mar)
138 mar = U32_MAX;
139 else
140 mar--;
141 id_zns->mar = cpu_to_le32(mar);
142
143 done:
144 status = nvmet_copy_to_sgl(req, 0, id_zns, sizeof(*id_zns));
145 out:
146 kfree(id_zns);
147 nvmet_req_complete(req, status);
148 }
149
nvmet_bdev_validate_zone_mgmt_recv(struct nvmet_req * req)150 static u16 nvmet_bdev_validate_zone_mgmt_recv(struct nvmet_req *req)
151 {
152 sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
153 u32 out_bufsize = (le32_to_cpu(req->cmd->zmr.numd) + 1) << 2;
154
155 if (sect >= get_capacity(req->ns->bdev->bd_disk)) {
156 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, slba);
157 return NVME_SC_LBA_RANGE | NVME_STATUS_DNR;
158 }
159
160 if (out_bufsize < sizeof(struct nvme_zone_report)) {
161 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, numd);
162 return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
163 }
164
165 if (req->cmd->zmr.zra != NVME_ZRA_ZONE_REPORT) {
166 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, zra);
167 return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
168 }
169
170 switch (req->cmd->zmr.pr) {
171 case 0:
172 case 1:
173 break;
174 default:
175 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, pr);
176 return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
177 }
178
179 switch (req->cmd->zmr.zrasf) {
180 case NVME_ZRASF_ZONE_REPORT_ALL:
181 case NVME_ZRASF_ZONE_STATE_EMPTY:
182 case NVME_ZRASF_ZONE_STATE_IMP_OPEN:
183 case NVME_ZRASF_ZONE_STATE_EXP_OPEN:
184 case NVME_ZRASF_ZONE_STATE_CLOSED:
185 case NVME_ZRASF_ZONE_STATE_FULL:
186 case NVME_ZRASF_ZONE_STATE_READONLY:
187 case NVME_ZRASF_ZONE_STATE_OFFLINE:
188 break;
189 default:
190 req->error_loc =
191 offsetof(struct nvme_zone_mgmt_recv_cmd, zrasf);
192 return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
193 }
194
195 return NVME_SC_SUCCESS;
196 }
197
198 struct nvmet_report_zone_data {
199 struct nvmet_req *req;
200 u64 out_buf_offset;
201 u64 out_nr_zones;
202 u64 nr_zones;
203 u8 zrasf;
204 };
205
nvmet_bdev_report_zone_cb(struct blk_zone * z,unsigned i,void * d)206 static int nvmet_bdev_report_zone_cb(struct blk_zone *z, unsigned i, void *d)
207 {
208 static const unsigned int nvme_zrasf_to_blk_zcond[] = {
209 [NVME_ZRASF_ZONE_STATE_EMPTY] = BLK_ZONE_COND_EMPTY,
210 [NVME_ZRASF_ZONE_STATE_IMP_OPEN] = BLK_ZONE_COND_IMP_OPEN,
211 [NVME_ZRASF_ZONE_STATE_EXP_OPEN] = BLK_ZONE_COND_EXP_OPEN,
212 [NVME_ZRASF_ZONE_STATE_CLOSED] = BLK_ZONE_COND_CLOSED,
213 [NVME_ZRASF_ZONE_STATE_READONLY] = BLK_ZONE_COND_READONLY,
214 [NVME_ZRASF_ZONE_STATE_FULL] = BLK_ZONE_COND_FULL,
215 [NVME_ZRASF_ZONE_STATE_OFFLINE] = BLK_ZONE_COND_OFFLINE,
216 };
217 struct nvmet_report_zone_data *rz = d;
218
219 if (rz->zrasf != NVME_ZRASF_ZONE_REPORT_ALL &&
220 z->cond != nvme_zrasf_to_blk_zcond[rz->zrasf])
221 return 0;
222
223 if (rz->nr_zones < rz->out_nr_zones) {
224 struct nvme_zone_descriptor zdesc = { };
225 u16 status;
226
227 zdesc.zcap = nvmet_sect_to_lba(rz->req->ns, z->capacity);
228 zdesc.zslba = nvmet_sect_to_lba(rz->req->ns, z->start);
229 zdesc.wp = nvmet_sect_to_lba(rz->req->ns, z->wp);
230 zdesc.za = z->reset ? 1 << 2 : 0;
231 zdesc.zs = z->cond << 4;
232 zdesc.zt = z->type;
233
234 status = nvmet_copy_to_sgl(rz->req, rz->out_buf_offset, &zdesc,
235 sizeof(zdesc));
236 if (status)
237 return -EINVAL;
238
239 rz->out_buf_offset += sizeof(zdesc);
240 }
241
242 rz->nr_zones++;
243
244 return 0;
245 }
246
nvmet_req_nr_zones_from_slba(struct nvmet_req * req)247 static unsigned long nvmet_req_nr_zones_from_slba(struct nvmet_req *req)
248 {
249 unsigned int sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
250
251 return bdev_nr_zones(req->ns->bdev) - bdev_zone_no(req->ns->bdev, sect);
252 }
253
get_nr_zones_from_buf(struct nvmet_req * req,u32 bufsize)254 static unsigned long get_nr_zones_from_buf(struct nvmet_req *req, u32 bufsize)
255 {
256 if (bufsize <= sizeof(struct nvme_zone_report))
257 return 0;
258
259 return (bufsize - sizeof(struct nvme_zone_report)) /
260 sizeof(struct nvme_zone_descriptor);
261 }
262
nvmet_bdev_zone_zmgmt_recv_work(struct work_struct * w)263 static void nvmet_bdev_zone_zmgmt_recv_work(struct work_struct *w)
264 {
265 struct nvmet_req *req = container_of(w, struct nvmet_req, z.zmgmt_work);
266 sector_t start_sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
267 unsigned long req_slba_nr_zones = nvmet_req_nr_zones_from_slba(req);
268 u32 out_bufsize = (le32_to_cpu(req->cmd->zmr.numd) + 1) << 2;
269 __le64 nr_zones;
270 u16 status;
271 int ret;
272 struct nvmet_report_zone_data rz_data = {
273 .out_nr_zones = get_nr_zones_from_buf(req, out_bufsize),
274 /* leave the place for report zone header */
275 .out_buf_offset = sizeof(struct nvme_zone_report),
276 .zrasf = req->cmd->zmr.zrasf,
277 .nr_zones = 0,
278 .req = req,
279 };
280
281 status = nvmet_bdev_validate_zone_mgmt_recv(req);
282 if (status)
283 goto out;
284
285 if (!req_slba_nr_zones) {
286 status = NVME_SC_SUCCESS;
287 goto out;
288 }
289
290 ret = blkdev_report_zones(req->ns->bdev, start_sect, req_slba_nr_zones,
291 nvmet_bdev_report_zone_cb, &rz_data);
292 if (ret < 0) {
293 status = NVME_SC_INTERNAL;
294 goto out;
295 }
296
297 /*
298 * Partial report (PR bit set): the host accepts an incomplete listing,
299 * so cap Number of Zones to the descriptors that fit in the buffer.
300 * Full report (PR bit clear): Number of Zones is the match count; fail
301 * if the buffer cannot hold every matching zone descriptor.
302 */
303 if (req->cmd->zmr.pr) {
304 rz_data.nr_zones = min(rz_data.nr_zones, rz_data.out_nr_zones);
305 } else if (rz_data.nr_zones > rz_data.out_nr_zones) {
306 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, numd);
307 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
308 goto out;
309 }
310
311 nr_zones = cpu_to_le64(rz_data.nr_zones);
312 status = nvmet_copy_to_sgl(req, 0, &nr_zones, sizeof(nr_zones));
313
314 out:
315 nvmet_req_complete(req, status);
316 }
317
nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req * req)318 void nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req *req)
319 {
320 INIT_WORK(&req->z.zmgmt_work, nvmet_bdev_zone_zmgmt_recv_work);
321 queue_work(zbd_wq, &req->z.zmgmt_work);
322 }
323
zsa_req_op(u8 zsa)324 static inline enum req_op zsa_req_op(u8 zsa)
325 {
326 switch (zsa) {
327 case NVME_ZONE_OPEN:
328 return REQ_OP_ZONE_OPEN;
329 case NVME_ZONE_CLOSE:
330 return REQ_OP_ZONE_CLOSE;
331 case NVME_ZONE_FINISH:
332 return REQ_OP_ZONE_FINISH;
333 case NVME_ZONE_RESET:
334 return REQ_OP_ZONE_RESET;
335 default:
336 return REQ_OP_LAST;
337 }
338 }
339
blkdev_zone_mgmt_errno_to_nvme_status(int ret)340 static u16 blkdev_zone_mgmt_errno_to_nvme_status(int ret)
341 {
342 switch (ret) {
343 case 0:
344 return NVME_SC_SUCCESS;
345 case -EINVAL:
346 case -EIO:
347 return NVME_SC_ZONE_INVALID_TRANSITION | NVME_STATUS_DNR;
348 default:
349 return NVME_SC_INTERNAL;
350 }
351 }
352
353 struct nvmet_zone_mgmt_send_all_data {
354 unsigned long *zbitmap;
355 struct nvmet_req *req;
356 };
357
zmgmt_send_scan_cb(struct blk_zone * z,unsigned i,void * d)358 static int zmgmt_send_scan_cb(struct blk_zone *z, unsigned i, void *d)
359 {
360 struct nvmet_zone_mgmt_send_all_data *data = d;
361
362 switch (zsa_req_op(data->req->cmd->zms.zsa)) {
363 case REQ_OP_ZONE_OPEN:
364 switch (z->cond) {
365 case BLK_ZONE_COND_CLOSED:
366 break;
367 default:
368 return 0;
369 }
370 break;
371 case REQ_OP_ZONE_CLOSE:
372 switch (z->cond) {
373 case BLK_ZONE_COND_IMP_OPEN:
374 case BLK_ZONE_COND_EXP_OPEN:
375 break;
376 default:
377 return 0;
378 }
379 break;
380 case REQ_OP_ZONE_FINISH:
381 switch (z->cond) {
382 case BLK_ZONE_COND_IMP_OPEN:
383 case BLK_ZONE_COND_EXP_OPEN:
384 case BLK_ZONE_COND_CLOSED:
385 break;
386 default:
387 return 0;
388 }
389 break;
390 default:
391 return -EINVAL;
392 }
393
394 set_bit(i, data->zbitmap);
395
396 return 0;
397 }
398
nvmet_bdev_zone_mgmt_emulate_all(struct nvmet_req * req)399 static u16 nvmet_bdev_zone_mgmt_emulate_all(struct nvmet_req *req)
400 {
401 struct block_device *bdev = req->ns->bdev;
402 unsigned int nr_zones = bdev_nr_zones(bdev);
403 struct bio *bio = NULL;
404 sector_t sector = 0;
405 int ret;
406 struct nvmet_zone_mgmt_send_all_data d = {
407 .req = req,
408 };
409
410 d.zbitmap = kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(*(d.zbitmap)),
411 GFP_NOIO, bdev->bd_disk->node_id);
412 if (!d.zbitmap) {
413 ret = -ENOMEM;
414 goto out;
415 }
416
417 /* Scan and build bitmap of the eligible zones */
418 ret = blkdev_report_zones(bdev, 0, nr_zones, zmgmt_send_scan_cb, &d);
419 if (ret != nr_zones) {
420 if (ret > 0)
421 ret = -EIO;
422 goto out;
423 } else {
424 /* We scanned all the zones */
425 ret = 0;
426 }
427
428 while (sector < bdev_nr_sectors(bdev)) {
429 if (test_bit(disk_zone_no(bdev->bd_disk, sector), d.zbitmap)) {
430 bio = blk_next_bio(bio, bdev, 0,
431 zsa_req_op(req->cmd->zms.zsa) | REQ_SYNC,
432 GFP_KERNEL);
433 bio->bi_iter.bi_sector = sector;
434 /* This may take a while, so be nice to others */
435 cond_resched();
436 }
437 sector += bdev_zone_sectors(bdev);
438 }
439
440 if (bio) {
441 ret = submit_bio_wait(bio);
442 bio_put(bio);
443 }
444
445 out:
446 kfree(d.zbitmap);
447
448 return blkdev_zone_mgmt_errno_to_nvme_status(ret);
449 }
450
nvmet_bdev_execute_zmgmt_send_all(struct nvmet_req * req)451 static u16 nvmet_bdev_execute_zmgmt_send_all(struct nvmet_req *req)
452 {
453 int ret;
454
455 switch (zsa_req_op(req->cmd->zms.zsa)) {
456 case REQ_OP_ZONE_RESET:
457 ret = blkdev_zone_mgmt(req->ns->bdev, REQ_OP_ZONE_RESET, 0,
458 get_capacity(req->ns->bdev->bd_disk));
459 if (ret < 0)
460 return blkdev_zone_mgmt_errno_to_nvme_status(ret);
461 break;
462 case REQ_OP_ZONE_OPEN:
463 case REQ_OP_ZONE_CLOSE:
464 case REQ_OP_ZONE_FINISH:
465 return nvmet_bdev_zone_mgmt_emulate_all(req);
466 default:
467 /* this is needed to quiet compiler warning */
468 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, zsa);
469 return NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
470 }
471
472 return NVME_SC_SUCCESS;
473 }
474
nvmet_bdev_zmgmt_send_work(struct work_struct * w)475 static void nvmet_bdev_zmgmt_send_work(struct work_struct *w)
476 {
477 struct nvmet_req *req = container_of(w, struct nvmet_req, z.zmgmt_work);
478 sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->zms.slba);
479 enum req_op op = zsa_req_op(req->cmd->zms.zsa);
480 struct block_device *bdev = req->ns->bdev;
481 sector_t zone_sectors = bdev_zone_sectors(bdev);
482 u16 status = NVME_SC_SUCCESS;
483 int ret;
484
485 if (op == REQ_OP_LAST) {
486 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, zsa);
487 status = NVME_SC_ZONE_INVALID_TRANSITION | NVME_STATUS_DNR;
488 goto out;
489 }
490
491 /* when select all bit is set slba field is ignored */
492 if (req->cmd->zms.select_all) {
493 status = nvmet_bdev_execute_zmgmt_send_all(req);
494 goto out;
495 }
496
497 if (sect >= get_capacity(bdev->bd_disk)) {
498 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, slba);
499 status = NVME_SC_LBA_RANGE | NVME_STATUS_DNR;
500 goto out;
501 }
502
503 if (sect & (zone_sectors - 1)) {
504 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, slba);
505 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
506 goto out;
507 }
508
509 ret = blkdev_zone_mgmt(bdev, op, sect, zone_sectors);
510 if (ret < 0)
511 status = blkdev_zone_mgmt_errno_to_nvme_status(ret);
512
513 out:
514 nvmet_req_complete(req, status);
515 }
516
nvmet_bdev_execute_zone_mgmt_send(struct nvmet_req * req)517 void nvmet_bdev_execute_zone_mgmt_send(struct nvmet_req *req)
518 {
519 INIT_WORK(&req->z.zmgmt_work, nvmet_bdev_zmgmt_send_work);
520 queue_work(zbd_wq, &req->z.zmgmt_work);
521 }
522
nvmet_bdev_zone_append_bio_done(struct bio * bio)523 static void nvmet_bdev_zone_append_bio_done(struct bio *bio)
524 {
525 struct nvmet_req *req = bio->bi_private;
526
527 if (bio->bi_status == BLK_STS_OK) {
528 req->cqe->result.u64 =
529 nvmet_sect_to_lba(req->ns, bio->bi_iter.bi_sector);
530 }
531
532 nvmet_req_complete(req, blk_to_nvme_status(req, bio->bi_status));
533 nvmet_req_bio_put(req, bio);
534 }
535
nvmet_bdev_execute_zone_append(struct nvmet_req * req)536 void nvmet_bdev_execute_zone_append(struct nvmet_req *req)
537 {
538 sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->rw.slba);
539 const blk_opf_t opf = REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE;
540 u16 status = NVME_SC_SUCCESS;
541 unsigned int total_len = 0;
542 struct scatterlist *sg;
543 u32 data_len = nvmet_rw_data_len(req);
544 struct bio *bio;
545 int sg_cnt;
546
547 /* Request is completed on len mismatch in nvmet_check_transfer_len() */
548 if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req)))
549 return;
550
551 if (data_len >
552 bdev_max_zone_append_sectors(req->ns->bdev) << SECTOR_SHIFT) {
553 req->error_loc = offsetof(struct nvme_rw_command, length);
554 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
555 goto out;
556 }
557
558 if (!req->sg_cnt) {
559 nvmet_req_complete(req, 0);
560 return;
561 }
562
563 if (sect >= get_capacity(req->ns->bdev->bd_disk)) {
564 req->error_loc = offsetof(struct nvme_rw_command, slba);
565 status = NVME_SC_LBA_RANGE | NVME_STATUS_DNR;
566 goto out;
567 }
568
569 if (sect & (bdev_zone_sectors(req->ns->bdev) - 1)) {
570 req->error_loc = offsetof(struct nvme_rw_command, slba);
571 status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
572 goto out;
573 }
574
575 if (nvmet_use_inline_bvec(req)) {
576 bio = &req->z.inline_bio;
577 bio_init(bio, req->ns->bdev, req->inline_bvec,
578 ARRAY_SIZE(req->inline_bvec), opf);
579 } else {
580 bio = bio_alloc(req->ns->bdev, req->sg_cnt, opf, GFP_KERNEL);
581 }
582
583 bio->bi_end_io = nvmet_bdev_zone_append_bio_done;
584 bio->bi_iter.bi_sector = sect;
585 bio->bi_private = req;
586 if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA))
587 bio->bi_opf |= REQ_FUA;
588
589 for_each_sg(req->sg, sg, req->sg_cnt, sg_cnt) {
590 unsigned int len = sg->length;
591
592 if (bio_add_page(bio, sg_page(sg), len, sg->offset) != len) {
593 status = NVME_SC_INTERNAL;
594 goto out_put_bio;
595 }
596 total_len += len;
597 }
598
599 if (total_len != data_len) {
600 status = NVME_SC_INTERNAL | NVME_STATUS_DNR;
601 goto out_put_bio;
602 }
603
604 submit_bio(bio);
605 return;
606
607 out_put_bio:
608 nvmet_req_bio_put(req, bio);
609 out:
610 nvmet_req_complete(req, status);
611 }
612
nvmet_bdev_zns_parse_io_cmd(struct nvmet_req * req)613 u16 nvmet_bdev_zns_parse_io_cmd(struct nvmet_req *req)
614 {
615 struct nvme_command *cmd = req->cmd;
616
617 switch (cmd->common.opcode) {
618 case nvme_cmd_zone_append:
619 req->execute = nvmet_bdev_execute_zone_append;
620 return 0;
621 case nvme_cmd_zone_mgmt_recv:
622 req->execute = nvmet_bdev_execute_zone_mgmt_recv;
623 return 0;
624 case nvme_cmd_zone_mgmt_send:
625 req->execute = nvmet_bdev_execute_zone_mgmt_send;
626 return 0;
627 default:
628 return nvmet_bdev_parse_io_cmd(req);
629 }
630 }
631