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 (!bdev_is_zone_start(bd_disk->part0, get_capacity(bd_disk)))
53 return false;
54 /*
55 * ZNS does not define a conventional zone type. If the underlying
56 * device has a bitmap set indicating the existence of conventional
57 * zones, reject the device. Otherwise, use report zones to detect if
58 * the device has conventional zones.
59 */
60 if (ns->bdev->bd_disk->queue->conv_zones_bitmap)
61 return false;
62
63 ret = blkdev_report_zones(ns->bdev, 0, blkdev_nr_zones(bd_disk),
64 validate_conv_zones_cb, NULL);
65 if (ret < 0)
66 return false;
67
68 ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev));
69
70 return true;
71 }
72
nvmet_execute_identify_ctrl_zns(struct nvmet_req * req)73 void nvmet_execute_identify_ctrl_zns(struct nvmet_req *req)
74 {
75 u8 zasl = req->sq->ctrl->subsys->zasl;
76 struct nvmet_ctrl *ctrl = req->sq->ctrl;
77 struct nvme_id_ctrl_zns *id;
78 u16 status;
79
80 id = kzalloc(sizeof(*id), GFP_KERNEL);
81 if (!id) {
82 status = NVME_SC_INTERNAL;
83 goto out;
84 }
85
86 if (ctrl->ops->get_mdts)
87 id->zasl = min_t(u8, ctrl->ops->get_mdts(ctrl), zasl);
88 else
89 id->zasl = zasl;
90
91 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
92
93 kfree(id);
94 out:
95 nvmet_req_complete(req, status);
96 }
97
nvmet_execute_identify_cns_cs_ns(struct nvmet_req * req)98 void nvmet_execute_identify_cns_cs_ns(struct nvmet_req *req)
99 {
100 struct nvme_id_ns_zns *id_zns = NULL;
101 u64 zsze;
102 u16 status;
103 u32 mar, mor;
104
105 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
106 req->error_loc = offsetof(struct nvme_identify, nsid);
107 status = NVME_SC_INVALID_NS | NVME_SC_DNR;
108 goto out;
109 }
110
111 id_zns = kzalloc(sizeof(*id_zns), GFP_KERNEL);
112 if (!id_zns) {
113 status = NVME_SC_INTERNAL;
114 goto out;
115 }
116
117 status = nvmet_req_find_ns(req);
118 if (status)
119 goto done;
120
121 if (nvmet_ns_revalidate(req->ns)) {
122 mutex_lock(&req->ns->subsys->lock);
123 nvmet_ns_changed(req->ns->subsys, req->ns->nsid);
124 mutex_unlock(&req->ns->subsys->lock);
125 }
126
127 if (!bdev_is_zoned(req->ns->bdev)) {
128 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
129 req->error_loc = offsetof(struct nvme_identify, nsid);
130 goto out;
131 }
132
133 zsze = (bdev_zone_sectors(req->ns->bdev) << 9) >>
134 req->ns->blksize_shift;
135 id_zns->lbafe[0].zsze = cpu_to_le64(zsze);
136
137 mor = bdev_max_open_zones(req->ns->bdev);
138 if (!mor)
139 mor = U32_MAX;
140 else
141 mor--;
142 id_zns->mor = cpu_to_le32(mor);
143
144 mar = bdev_max_active_zones(req->ns->bdev);
145 if (!mar)
146 mar = U32_MAX;
147 else
148 mar--;
149 id_zns->mar = cpu_to_le32(mar);
150
151 done:
152 status = nvmet_copy_to_sgl(req, 0, id_zns, sizeof(*id_zns));
153 out:
154 kfree(id_zns);
155 nvmet_req_complete(req, status);
156 }
157
nvmet_bdev_validate_zone_mgmt_recv(struct nvmet_req * req)158 static u16 nvmet_bdev_validate_zone_mgmt_recv(struct nvmet_req *req)
159 {
160 sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
161 u32 out_bufsize = (le32_to_cpu(req->cmd->zmr.numd) + 1) << 2;
162
163 if (sect >= get_capacity(req->ns->bdev->bd_disk)) {
164 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, slba);
165 return NVME_SC_LBA_RANGE | NVME_SC_DNR;
166 }
167
168 if (out_bufsize < sizeof(struct nvme_zone_report)) {
169 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, numd);
170 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
171 }
172
173 if (req->cmd->zmr.zra != NVME_ZRA_ZONE_REPORT) {
174 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, zra);
175 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
176 }
177
178 switch (req->cmd->zmr.pr) {
179 case 0:
180 case 1:
181 break;
182 default:
183 req->error_loc = offsetof(struct nvme_zone_mgmt_recv_cmd, pr);
184 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
185 }
186
187 switch (req->cmd->zmr.zrasf) {
188 case NVME_ZRASF_ZONE_REPORT_ALL:
189 case NVME_ZRASF_ZONE_STATE_EMPTY:
190 case NVME_ZRASF_ZONE_STATE_IMP_OPEN:
191 case NVME_ZRASF_ZONE_STATE_EXP_OPEN:
192 case NVME_ZRASF_ZONE_STATE_CLOSED:
193 case NVME_ZRASF_ZONE_STATE_FULL:
194 case NVME_ZRASF_ZONE_STATE_READONLY:
195 case NVME_ZRASF_ZONE_STATE_OFFLINE:
196 break;
197 default:
198 req->error_loc =
199 offsetof(struct nvme_zone_mgmt_recv_cmd, zrasf);
200 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
201 }
202
203 return NVME_SC_SUCCESS;
204 }
205
206 struct nvmet_report_zone_data {
207 struct nvmet_req *req;
208 u64 out_buf_offset;
209 u64 out_nr_zones;
210 u64 nr_zones;
211 u8 zrasf;
212 };
213
nvmet_bdev_report_zone_cb(struct blk_zone * z,unsigned i,void * d)214 static int nvmet_bdev_report_zone_cb(struct blk_zone *z, unsigned i, void *d)
215 {
216 static const unsigned int nvme_zrasf_to_blk_zcond[] = {
217 [NVME_ZRASF_ZONE_STATE_EMPTY] = BLK_ZONE_COND_EMPTY,
218 [NVME_ZRASF_ZONE_STATE_IMP_OPEN] = BLK_ZONE_COND_IMP_OPEN,
219 [NVME_ZRASF_ZONE_STATE_EXP_OPEN] = BLK_ZONE_COND_EXP_OPEN,
220 [NVME_ZRASF_ZONE_STATE_CLOSED] = BLK_ZONE_COND_CLOSED,
221 [NVME_ZRASF_ZONE_STATE_READONLY] = BLK_ZONE_COND_READONLY,
222 [NVME_ZRASF_ZONE_STATE_FULL] = BLK_ZONE_COND_FULL,
223 [NVME_ZRASF_ZONE_STATE_OFFLINE] = BLK_ZONE_COND_OFFLINE,
224 };
225 struct nvmet_report_zone_data *rz = d;
226
227 if (rz->zrasf != NVME_ZRASF_ZONE_REPORT_ALL &&
228 z->cond != nvme_zrasf_to_blk_zcond[rz->zrasf])
229 return 0;
230
231 if (rz->nr_zones < rz->out_nr_zones) {
232 struct nvme_zone_descriptor zdesc = { };
233 u16 status;
234
235 zdesc.zcap = nvmet_sect_to_lba(rz->req->ns, z->capacity);
236 zdesc.zslba = nvmet_sect_to_lba(rz->req->ns, z->start);
237 zdesc.wp = nvmet_sect_to_lba(rz->req->ns, z->wp);
238 zdesc.za = z->reset ? 1 << 2 : 0;
239 zdesc.zs = z->cond << 4;
240 zdesc.zt = z->type;
241
242 status = nvmet_copy_to_sgl(rz->req, rz->out_buf_offset, &zdesc,
243 sizeof(zdesc));
244 if (status)
245 return -EINVAL;
246
247 rz->out_buf_offset += sizeof(zdesc);
248 }
249
250 rz->nr_zones++;
251
252 return 0;
253 }
254
nvmet_req_nr_zones_from_slba(struct nvmet_req * req)255 static unsigned long nvmet_req_nr_zones_from_slba(struct nvmet_req *req)
256 {
257 unsigned int sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
258
259 return blkdev_nr_zones(req->ns->bdev->bd_disk) -
260 bdev_zone_no(req->ns->bdev, sect);
261 }
262
get_nr_zones_from_buf(struct nvmet_req * req,u32 bufsize)263 static unsigned long get_nr_zones_from_buf(struct nvmet_req *req, u32 bufsize)
264 {
265 if (bufsize <= sizeof(struct nvme_zone_report))
266 return 0;
267
268 return (bufsize - sizeof(struct nvme_zone_report)) /
269 sizeof(struct nvme_zone_descriptor);
270 }
271
nvmet_bdev_zone_zmgmt_recv_work(struct work_struct * w)272 static void nvmet_bdev_zone_zmgmt_recv_work(struct work_struct *w)
273 {
274 struct nvmet_req *req = container_of(w, struct nvmet_req, z.zmgmt_work);
275 sector_t start_sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
276 unsigned long req_slba_nr_zones = nvmet_req_nr_zones_from_slba(req);
277 u32 out_bufsize = (le32_to_cpu(req->cmd->zmr.numd) + 1) << 2;
278 __le64 nr_zones;
279 u16 status;
280 int ret;
281 struct nvmet_report_zone_data rz_data = {
282 .out_nr_zones = get_nr_zones_from_buf(req, out_bufsize),
283 /* leave the place for report zone header */
284 .out_buf_offset = sizeof(struct nvme_zone_report),
285 .zrasf = req->cmd->zmr.zrasf,
286 .nr_zones = 0,
287 .req = req,
288 };
289
290 status = nvmet_bdev_validate_zone_mgmt_recv(req);
291 if (status)
292 goto out;
293
294 if (!req_slba_nr_zones) {
295 status = NVME_SC_SUCCESS;
296 goto out;
297 }
298
299 ret = blkdev_report_zones(req->ns->bdev, start_sect, req_slba_nr_zones,
300 nvmet_bdev_report_zone_cb, &rz_data);
301 if (ret < 0) {
302 status = NVME_SC_INTERNAL;
303 goto out;
304 }
305
306 /*
307 * When partial bit is set nr_zones must indicate the number of zone
308 * descriptors actually transferred.
309 */
310 if (req->cmd->zmr.pr)
311 rz_data.nr_zones = min(rz_data.nr_zones, rz_data.out_nr_zones);
312
313 nr_zones = cpu_to_le64(rz_data.nr_zones);
314 status = nvmet_copy_to_sgl(req, 0, &nr_zones, sizeof(nr_zones));
315
316 out:
317 nvmet_req_complete(req, status);
318 }
319
nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req * req)320 void nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req *req)
321 {
322 INIT_WORK(&req->z.zmgmt_work, nvmet_bdev_zone_zmgmt_recv_work);
323 queue_work(zbd_wq, &req->z.zmgmt_work);
324 }
325
zsa_req_op(u8 zsa)326 static inline enum req_opf zsa_req_op(u8 zsa)
327 {
328 switch (zsa) {
329 case NVME_ZONE_OPEN:
330 return REQ_OP_ZONE_OPEN;
331 case NVME_ZONE_CLOSE:
332 return REQ_OP_ZONE_CLOSE;
333 case NVME_ZONE_FINISH:
334 return REQ_OP_ZONE_FINISH;
335 case NVME_ZONE_RESET:
336 return REQ_OP_ZONE_RESET;
337 default:
338 return REQ_OP_LAST;
339 }
340 }
341
blkdev_zone_mgmt_errno_to_nvme_status(int ret)342 static u16 blkdev_zone_mgmt_errno_to_nvme_status(int ret)
343 {
344 switch (ret) {
345 case 0:
346 return NVME_SC_SUCCESS;
347 case -EINVAL:
348 case -EIO:
349 return NVME_SC_ZONE_INVALID_TRANSITION | NVME_SC_DNR;
350 default:
351 return NVME_SC_INTERNAL;
352 }
353 }
354
355 struct nvmet_zone_mgmt_send_all_data {
356 unsigned long *zbitmap;
357 struct nvmet_req *req;
358 };
359
zmgmt_send_scan_cb(struct blk_zone * z,unsigned i,void * d)360 static int zmgmt_send_scan_cb(struct blk_zone *z, unsigned i, void *d)
361 {
362 struct nvmet_zone_mgmt_send_all_data *data = d;
363
364 switch (zsa_req_op(data->req->cmd->zms.zsa)) {
365 case REQ_OP_ZONE_OPEN:
366 switch (z->cond) {
367 case BLK_ZONE_COND_CLOSED:
368 break;
369 default:
370 return 0;
371 }
372 break;
373 case REQ_OP_ZONE_CLOSE:
374 switch (z->cond) {
375 case BLK_ZONE_COND_IMP_OPEN:
376 case BLK_ZONE_COND_EXP_OPEN:
377 break;
378 default:
379 return 0;
380 }
381 break;
382 case REQ_OP_ZONE_FINISH:
383 switch (z->cond) {
384 case BLK_ZONE_COND_IMP_OPEN:
385 case BLK_ZONE_COND_EXP_OPEN:
386 case BLK_ZONE_COND_CLOSED:
387 break;
388 default:
389 return 0;
390 }
391 break;
392 default:
393 return -EINVAL;
394 }
395
396 set_bit(i, data->zbitmap);
397
398 return 0;
399 }
400
nvmet_bdev_zone_mgmt_emulate_all(struct nvmet_req * req)401 static u16 nvmet_bdev_zone_mgmt_emulate_all(struct nvmet_req *req)
402 {
403 struct block_device *bdev = req->ns->bdev;
404 unsigned int nr_zones = blkdev_nr_zones(bdev->bd_disk);
405 struct request_queue *q = bdev_get_queue(bdev);
406 struct bio *bio = NULL;
407 sector_t sector = 0;
408 int ret;
409 struct nvmet_zone_mgmt_send_all_data d = {
410 .req = req,
411 };
412
413 d.zbitmap = kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(*(d.zbitmap)),
414 GFP_NOIO, q->node);
415 if (!d.zbitmap) {
416 ret = -ENOMEM;
417 goto out;
418 }
419
420 /* Scan and build bitmap of the eligible zones */
421 ret = blkdev_report_zones(bdev, 0, nr_zones, zmgmt_send_scan_cb, &d);
422 if (ret != nr_zones) {
423 if (ret > 0)
424 ret = -EIO;
425 goto out;
426 } else {
427 /* We scanned all the zones */
428 ret = 0;
429 }
430
431 while (sector < get_capacity(bdev->bd_disk)) {
432 if (test_bit(blk_queue_zone_no(q, sector), d.zbitmap)) {
433 bio = blk_next_bio(bio, 0, GFP_KERNEL);
434 bio->bi_opf = zsa_req_op(req->cmd->zms.zsa) | REQ_SYNC;
435 bio->bi_iter.bi_sector = sector;
436 bio_set_dev(bio, bdev);
437 /* This may take a while, so be nice to others */
438 cond_resched();
439 }
440 sector += blk_queue_zone_sectors(q);
441 }
442
443 if (bio) {
444 ret = submit_bio_wait(bio);
445 bio_put(bio);
446 }
447
448 out:
449 kfree(d.zbitmap);
450
451 return blkdev_zone_mgmt_errno_to_nvme_status(ret);
452 }
453
nvmet_bdev_execute_zmgmt_send_all(struct nvmet_req * req)454 static u16 nvmet_bdev_execute_zmgmt_send_all(struct nvmet_req *req)
455 {
456 int ret;
457
458 switch (zsa_req_op(req->cmd->zms.zsa)) {
459 case REQ_OP_ZONE_RESET:
460 ret = blkdev_zone_mgmt(req->ns->bdev, REQ_OP_ZONE_RESET, 0,
461 get_capacity(req->ns->bdev->bd_disk),
462 GFP_KERNEL);
463 if (ret < 0)
464 return blkdev_zone_mgmt_errno_to_nvme_status(ret);
465 break;
466 case REQ_OP_ZONE_OPEN:
467 case REQ_OP_ZONE_CLOSE:
468 case REQ_OP_ZONE_FINISH:
469 return nvmet_bdev_zone_mgmt_emulate_all(req);
470 default:
471 /* this is needed to quiet compiler warning */
472 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, zsa);
473 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
474 }
475
476 return NVME_SC_SUCCESS;
477 }
478
nvmet_bdev_zmgmt_send_work(struct work_struct * w)479 static void nvmet_bdev_zmgmt_send_work(struct work_struct *w)
480 {
481 struct nvmet_req *req = container_of(w, struct nvmet_req, z.zmgmt_work);
482 sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->zms.slba);
483 enum req_opf op = zsa_req_op(req->cmd->zms.zsa);
484 struct block_device *bdev = req->ns->bdev;
485 sector_t zone_sectors = bdev_zone_sectors(bdev);
486 u16 status = NVME_SC_SUCCESS;
487 int ret;
488
489 if (op == REQ_OP_LAST) {
490 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, zsa);
491 status = NVME_SC_ZONE_INVALID_TRANSITION | NVME_SC_DNR;
492 goto out;
493 }
494
495 /* when select all bit is set slba field is ignored */
496 if (req->cmd->zms.select_all) {
497 status = nvmet_bdev_execute_zmgmt_send_all(req);
498 goto out;
499 }
500
501 if (sect >= get_capacity(bdev->bd_disk)) {
502 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, slba);
503 status = NVME_SC_LBA_RANGE | NVME_SC_DNR;
504 goto out;
505 }
506
507 if (!bdev_is_zone_start(bdev, sect)) {
508 req->error_loc = offsetof(struct nvme_zone_mgmt_send_cmd, slba);
509 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
510 goto out;
511 }
512
513 ret = blkdev_zone_mgmt(bdev, op, sect, zone_sectors, GFP_KERNEL);
514 if (ret < 0)
515 status = blkdev_zone_mgmt_errno_to_nvme_status(ret);
516
517 out:
518 nvmet_req_complete(req, status);
519 }
520
nvmet_bdev_execute_zone_mgmt_send(struct nvmet_req * req)521 void nvmet_bdev_execute_zone_mgmt_send(struct nvmet_req *req)
522 {
523 INIT_WORK(&req->z.zmgmt_work, nvmet_bdev_zmgmt_send_work);
524 queue_work(zbd_wq, &req->z.zmgmt_work);
525 }
526
nvmet_bdev_zone_append_bio_done(struct bio * bio)527 static void nvmet_bdev_zone_append_bio_done(struct bio *bio)
528 {
529 struct nvmet_req *req = bio->bi_private;
530
531 if (bio->bi_status == BLK_STS_OK) {
532 req->cqe->result.u64 =
533 nvmet_sect_to_lba(req->ns, bio->bi_iter.bi_sector);
534 }
535
536 nvmet_req_complete(req, blk_to_nvme_status(req, bio->bi_status));
537 nvmet_req_bio_put(req, bio);
538 }
539
nvmet_bdev_execute_zone_append(struct nvmet_req * req)540 void nvmet_bdev_execute_zone_append(struct nvmet_req *req)
541 {
542 sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->rw.slba);
543 u16 status = NVME_SC_SUCCESS;
544 unsigned int total_len = 0;
545 struct scatterlist *sg;
546 struct bio *bio;
547 int sg_cnt;
548
549 /* Request is completed on len mismatch in nvmet_check_transter_len() */
550 if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req)))
551 return;
552
553 if (!req->sg_cnt) {
554 nvmet_req_complete(req, 0);
555 return;
556 }
557
558 if (sect >= get_capacity(req->ns->bdev->bd_disk)) {
559 req->error_loc = offsetof(struct nvme_rw_command, slba);
560 status = NVME_SC_LBA_RANGE | NVME_SC_DNR;
561 goto out;
562 }
563
564 if (!bdev_is_zone_start(req->ns->bdev, sect)) {
565 req->error_loc = offsetof(struct nvme_rw_command, slba);
566 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
567 goto out;
568 }
569
570 if (nvmet_use_inline_bvec(req)) {
571 bio = &req->z.inline_bio;
572 bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec));
573 } else {
574 bio = bio_alloc(GFP_KERNEL, req->sg_cnt);
575 }
576
577 bio->bi_opf = REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE;
578 bio->bi_end_io = nvmet_bdev_zone_append_bio_done;
579 bio_set_dev(bio, req->ns->bdev);
580 bio->bi_iter.bi_sector = sect;
581 bio->bi_private = req;
582 if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA))
583 bio->bi_opf |= REQ_FUA;
584
585 for_each_sg(req->sg, sg, req->sg_cnt, sg_cnt) {
586 struct page *p = sg_page(sg);
587 unsigned int l = sg->length;
588 unsigned int o = sg->offset;
589 unsigned int ret;
590
591 ret = bio_add_zone_append_page(bio, p, l, o);
592 if (ret != sg->length) {
593 status = NVME_SC_INTERNAL;
594 goto out_put_bio;
595 }
596 total_len += sg->length;
597 }
598
599 if (total_len != nvmet_rw_data_len(req)) {
600 status = NVME_SC_INTERNAL | NVME_SC_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