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treewide: Rename enum req_opf into enum req_op
[linux-block.git] / drivers / block / null_blk / zoned.c
CommitLineData
ca4b2a01
MB		 1// SPDX-License-Identifier: GPL-2.0
2#include <linux/vmalloc.h>
aa1c09cb 3#include <linux/bitmap.h>
ca4b2a01
MB		 4#include "null_blk.h"
5
766c3297 6#define CREATE_TRACE_POINTS
eebf34a8 7#include "trace.h"
766c3297 8
db060f54
DLM		 9#undef pr_fmt
10#define pr_fmt(fmt) "null_blk: " fmt
11
cd92cdb9
DLM		 12static inline sector_t mb_to_sects(unsigned long mb)
13{
14 return ((sector_t)mb * SZ_1M) >> SECTOR_SHIFT;
15}
ca4b2a01
MB		 16
17static inline unsigned int null_zone_no(struct nullb_device *dev, sector_t sect)
18{
19 return sect >> ilog2(dev->zone_size_sects);
20}
21
2b8b7ed7
DLM		 22static inline void null_lock_zone_res(struct nullb_device *dev)
23{
24 if (dev->need_zone_res_mgmt)
25 spin_lock_irq(&dev->zone_res_lock);
26}
27
28static inline void null_unlock_zone_res(struct nullb_device *dev)
29{
30 if (dev->need_zone_res_mgmt)
31 spin_unlock_irq(&dev->zone_res_lock);
32}
33
34static inline void null_init_zone_lock(struct nullb_device *dev,
35 struct nullb_zone *zone)
36{
37 if (!dev->memory_backed)
38 spin_lock_init(&zone->spinlock);
39 else
40 mutex_init(&zone->mutex);
41}
42
43static inline void null_lock_zone(struct nullb_device *dev,
44 struct nullb_zone *zone)
45{
46 if (!dev->memory_backed)
47 spin_lock_irq(&zone->spinlock);
48 else
49 mutex_lock(&zone->mutex);
50}
51
52static inline void null_unlock_zone(struct nullb_device *dev,
53 struct nullb_zone *zone)
54{
55 if (!dev->memory_backed)
56 spin_unlock_irq(&zone->spinlock);
57 else
58 mutex_unlock(&zone->mutex);
59}
60
d205bde7 61int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q)
ca4b2a01 62{
0ebcdd70 63 sector_t dev_capacity_sects, zone_capacity_sects;
2b8b7ed7 64 struct nullb_zone *zone;
ca4b2a01
MB		 65 sector_t sector = 0;
66 unsigned int i;
67
68 if (!is_power_of_2(dev->zone_size)) {
9c7eddf1 69 pr_err("zone_size must be power-of-two\n");
ca4b2a01
MB		 70 return -EINVAL;
71 }
e2748325
CK		 72 if (dev->zone_size > dev->size) {
73 pr_err("Zone size larger than device capacity\n");
74 return -EINVAL;
75 }
ca4b2a01 76
089565fb
AR		 77 if (!dev->zone_capacity)
78 dev->zone_capacity = dev->zone_size;
79
80 if (dev->zone_capacity > dev->zone_size) {
db060f54
DLM		 81 pr_err("zone capacity (%lu MB) larger than zone size (%lu MB)\n",
82 dev->zone_capacity, dev->zone_size);
089565fb
AR		 83 return -EINVAL;
84 }
85
cd92cdb9
DLM		 86 zone_capacity_sects = mb_to_sects(dev->zone_capacity);
87 dev_capacity_sects = mb_to_sects(dev->size);
88 dev->zone_size_sects = mb_to_sects(dev->zone_size);
89 dev->nr_zones = round_up(dev_capacity_sects, dev->zone_size_sects)
90 >> ilog2(dev->zone_size_sects);
0ebcdd70 91
2b8b7ed7
DLM		 92 dev->zones = kvmalloc_array(dev->nr_zones, sizeof(struct nullb_zone),
93 GFP_KERNEL | __GFP_ZERO);
ca4b2a01
MB		 94 if (!dev->zones)
95 return -ENOMEM;
96
2b8b7ed7 97 spin_lock_init(&dev->zone_res_lock);
aa1c09cb 98
ea2c18e1
MS		 99 if (dev->zone_nr_conv >= dev->nr_zones) {
100 dev->zone_nr_conv = dev->nr_zones - 1;
9c7eddf1 101 pr_info("changed the number of conventional zones to %u",
ea2c18e1
MS		 102 dev->zone_nr_conv);
103 }
104
dc4d137e
NC		 105 /* Max active zones has to be < nbr of seq zones in order to be enforceable */
106 if (dev->zone_max_active >= dev->nr_zones - dev->zone_nr_conv) {
107 dev->zone_max_active = 0;
108 pr_info("zone_max_active limit disabled, limit >= zone count\n");
109 }
110
111 /* Max open zones has to be <= max active zones */
112 if (dev->zone_max_active && dev->zone_max_open > dev->zone_max_active) {
113 dev->zone_max_open = dev->zone_max_active;
114 pr_info("changed the maximum number of open zones to %u\n",
115 dev->nr_zones);
116 } else if (dev->zone_max_open >= dev->nr_zones - dev->zone_nr_conv) {
117 dev->zone_max_open = 0;
118 pr_info("zone_max_open limit disabled, limit >= zone count\n");
119 }
2b8b7ed7 120 dev->need_zone_res_mgmt = dev->zone_max_active || dev->zone_max_open;
2e8c6e0e 121 dev->imp_close_zone_no = dev->zone_nr_conv;
dc4d137e 122
ea2c18e1 123 for (i = 0; i < dev->zone_nr_conv; i++) {
2b8b7ed7 124 zone = &dev->zones[i];
ea2c18e1 125
2b8b7ed7 126 null_init_zone_lock(dev, zone);
ea2c18e1
MS		 127 zone->start = sector;
128 zone->len = dev->zone_size_sects;
82394db7 129 zone->capacity = zone->len;
ea2c18e1
MS		 130 zone->wp = zone->start + zone->len;
131 zone->type = BLK_ZONE_TYPE_CONVENTIONAL;
132 zone->cond = BLK_ZONE_COND_NOT_WP;
133
134 sector += dev->zone_size_sects;
135 }
136
137 for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
2b8b7ed7 138 zone = &dev->zones[i];
ca4b2a01 139
2b8b7ed7 140 null_init_zone_lock(dev, zone);
ca4b2a01 141 zone->start = zone->wp = sector;
0ebcdd70
DLM		 142 if (zone->start + dev->zone_size_sects > dev_capacity_sects)
143 zone->len = dev_capacity_sects - zone->start;
144 else
145 zone->len = dev->zone_size_sects;
146 zone->capacity =
147 min_t(sector_t, zone->len, zone_capacity_sects);
ca4b2a01
MB		 148 zone->type = BLK_ZONE_TYPE_SEQWRITE_REQ;
149 zone->cond = BLK_ZONE_COND_EMPTY;
150
151 sector += dev->zone_size_sects;
152 }
153
d205bde7
DLM		 154 return 0;
155}
156
157int null_register_zoned_dev(struct nullb *nullb)
158{
e0489ed5 159 struct nullb_device *dev = nullb->dev;
d205bde7
DLM		 160 struct request_queue *q = nullb->q;
161
6b2bd274 162 disk_set_zoned(nullb->disk, BLK_ZONED_HM);
5752dc78
DLM		 163 blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
164 blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE);
165
e0489ed5
DLM		 166 if (queue_is_mq(q)) {
167 int ret = blk_revalidate_disk_zones(nullb->disk, NULL);
168
169 if (ret)
170 return ret;
171 } else {
172 blk_queue_chunk_sectors(q, dev->zone_size_sects);
d86e716a 173 nullb->disk->nr_zones = bdev_nr_zones(nullb->disk->part0);
e0489ed5 174 }
d205bde7 175
e0489ed5 176 blk_queue_max_zone_append_sectors(q, dev->zone_size_sects);
982977df
CH		 177 disk_set_max_open_zones(nullb->disk, dev->zone_max_open);
178 disk_set_max_active_zones(nullb->disk, dev->zone_max_active);
d205bde7 179
ca4b2a01
MB		 180 return 0;
181}
182
d205bde7 183void null_free_zoned_dev(struct nullb_device *dev)
ca4b2a01
MB		 184{
185 kvfree(dev->zones);
72ce11dd 186 dev->zones = NULL;
ca4b2a01
MB		 187}
188
7fc8fb51 189int null_report_zones(struct gendisk *disk, sector_t sector,
d4100351 190 unsigned int nr_zones, report_zones_cb cb, void *data)
ca4b2a01 191{
e76239a3
CH		 192 struct nullb *nullb = disk->private_data;
193 struct nullb_device *dev = nullb->dev;
2b8b7ed7
DLM		 194 unsigned int first_zone, i;
195 struct nullb_zone *zone;
196 struct blk_zone blkz;
d4100351 197 int error;
ca4b2a01 198
d4100351
CH		 199 first_zone = null_zone_no(dev, sector);
200 if (first_zone >= dev->nr_zones)
201 return 0;
ca4b2a01 202
d4100351 203 nr_zones = min(nr_zones, dev->nr_zones - first_zone);
766c3297
CK		 204 trace_nullb_report_zones(nullb, nr_zones);
205
2b8b7ed7
DLM		 206 memset(&blkz, 0, sizeof(struct blk_zone));
207 zone = &dev->zones[first_zone];
208 for (i = 0; i < nr_zones; i++, zone++) {
d4100351
CH		 209 /*
210 * Stacked DM target drivers will remap the zone information by
211 * modifying the zone information passed to the report callback.
212 * So use a local copy to avoid corruption of the device zone
213 * array.
214 */
2b8b7ed7
DLM		 215 null_lock_zone(dev, zone);
216 blkz.start = zone->start;
217 blkz.len = zone->len;
218 blkz.wp = zone->wp;
219 blkz.type = zone->type;
220 blkz.cond = zone->cond;
221 blkz.capacity = zone->capacity;
222 null_unlock_zone(dev, zone);
223
224 error = cb(&blkz, i, data);
d4100351
CH		 225 if (error)
226 return error;
227 }
ca4b2a01 228
d4100351 229 return nr_zones;
ca4b2a01
MB		 230}
231
aa1c09cb
DLM		 232/*
233 * This is called in the case of memory backing from null_process_cmd()
234 * with the target zone already locked.
235 */
dd85b492
AJ		 236size_t null_zone_valid_read_len(struct nullb *nullb,
237 sector_t sector, unsigned int len)
238{
239 struct nullb_device *dev = nullb->dev;
2b8b7ed7 240 struct nullb_zone *zone = &dev->zones[null_zone_no(dev, sector)];
dd85b492
AJ		 241 unsigned int nr_sectors = len >> SECTOR_SHIFT;
242
243 /* Read must be below the write pointer position */
244 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL ||
245 sector + nr_sectors <= zone->wp)
246 return len;
247
248 if (sector > zone->wp)
249 return 0;
250
251 return (zone->wp - sector) << SECTOR_SHIFT;
252}
253
2b8b7ed7
DLM		 254static blk_status_t __null_close_zone(struct nullb_device *dev,
255 struct nullb_zone *zone)
dc4d137e 256{
dc4d137e
NC		 257 switch (zone->cond) {
258 case BLK_ZONE_COND_CLOSED:
259 /* close operation on closed is not an error */
260 return BLK_STS_OK;
261 case BLK_ZONE_COND_IMP_OPEN:
262 dev->nr_zones_imp_open--;
263 break;
264 case BLK_ZONE_COND_EXP_OPEN:
265 dev->nr_zones_exp_open--;
266 break;
267 case BLK_ZONE_COND_EMPTY:
268 case BLK_ZONE_COND_FULL:
269 default:
270 return BLK_STS_IOERR;
271 }
272
273 if (zone->wp == zone->start) {
274 zone->cond = BLK_ZONE_COND_EMPTY;
275 } else {
276 zone->cond = BLK_ZONE_COND_CLOSED;
277 dev->nr_zones_closed++;
278 }
279
280 return BLK_STS_OK;
281}
282
2e8c6e0e 283static void null_close_imp_open_zone(struct nullb_device *dev)
dc4d137e 284{
2e8c6e0e
DLM		 285 struct nullb_zone *zone;
286 unsigned int zno, i;
287
288 zno = dev->imp_close_zone_no;
289 if (zno >= dev->nr_zones)
290 zno = dev->zone_nr_conv;
dc4d137e
NC		 291
292 for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
2e8c6e0e
DLM		 293 zone = &dev->zones[zno];
294 zno++;
295 if (zno >= dev->nr_zones)
296 zno = dev->zone_nr_conv;
297
298 if (zone->cond == BLK_ZONE_COND_IMP_OPEN) {
299 __null_close_zone(dev, zone);
300 dev->imp_close_zone_no = zno;
dc4d137e
NC		 301 return;
302 }
303 }
304}
305
fd78874b 306static blk_status_t null_check_active(struct nullb_device *dev)
dc4d137e
NC		 307{
308 if (!dev->zone_max_active)
fd78874b
KB		 309 return BLK_STS_OK;
310
311 if (dev->nr_zones_exp_open + dev->nr_zones_imp_open +
312 dev->nr_zones_closed < dev->zone_max_active)
313 return BLK_STS_OK;
dc4d137e 314
fd78874b 315 return BLK_STS_ZONE_ACTIVE_RESOURCE;
dc4d137e
NC		 316}
317
fd78874b 318static blk_status_t null_check_open(struct nullb_device *dev)
dc4d137e
NC		 319{
320 if (!dev->zone_max_open)
fd78874b 321 return BLK_STS_OK;
dc4d137e
NC		 322
323 if (dev->nr_zones_exp_open + dev->nr_zones_imp_open < dev->zone_max_open)
fd78874b 324 return BLK_STS_OK;
dc4d137e 325
fd78874b
KB		 326 if (dev->nr_zones_imp_open) {
327 if (null_check_active(dev) == BLK_STS_OK) {
2e8c6e0e 328 null_close_imp_open_zone(dev);
fd78874b
KB		 329 return BLK_STS_OK;
330 }
dc4d137e
NC		 331 }
332
fd78874b 333 return BLK_STS_ZONE_OPEN_RESOURCE;
dc4d137e
NC		 334}
335
336/*
337 * This function matches the manage open zone resources function in the ZBC standard,
338 * with the addition of max active zones support (added in the ZNS standard).
339 *
340 * The function determines if a zone can transition to implicit open or explicit open,
341 * while maintaining the max open zone (and max active zone) limit(s). It may close an
342 * implicit open zone in order to make additional zone resources available.
343 *
344 * ZBC states that an implicit open zone shall be closed only if there is not
345 * room within the open limit. However, with the addition of an active limit,
346 * it is not certain that closing an implicit open zone will allow a new zone
347 * to be opened, since we might already be at the active limit capacity.
348 */
2b8b7ed7
DLM		 349static blk_status_t null_check_zone_resources(struct nullb_device *dev,
350 struct nullb_zone *zone)
dc4d137e 351{
fd78874b
KB		 352 blk_status_t ret;
353
dc4d137e
NC		 354 switch (zone->cond) {
355 case BLK_ZONE_COND_EMPTY:
fd78874b
KB		 356 ret = null_check_active(dev);
357 if (ret != BLK_STS_OK)
358 return ret;
dc4d137e
NC		 359 fallthrough;
360 case BLK_ZONE_COND_CLOSED:
fd78874b 361 return null_check_open(dev);
dc4d137e
NC		 362 default:
363 /* Should never be called for other states */
364 WARN_ON(1);
fd78874b 365 return BLK_STS_IOERR;
dc4d137e
NC		 366 }
367}
368
fceb5d1b 369static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
e0489ed5 370 unsigned int nr_sectors, bool append)
ca4b2a01
MB		 371{
372 struct nullb_device *dev = cmd->nq->dev;
ca4b2a01 373 unsigned int zno = null_zone_no(dev, sector);
2b8b7ed7 374 struct nullb_zone *zone = &dev->zones[zno];
9dd44c7e
DLM		 375 blk_status_t ret;
376
377 trace_nullb_zone_op(cmd, zno, zone->cond);
378
2e896d89
DLM		 379 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) {
380 if (append)
381 return BLK_STS_IOERR;
9dd44c7e 382 return null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
2e896d89 383 }
ca4b2a01 384
2b8b7ed7 385 null_lock_zone(dev, zone);
aa1c09cb 386
2b8b7ed7 387 if (zone->cond == BLK_ZONE_COND_FULL) {
ca4b2a01 388 /* Cannot write to a full zone */
aa1c09cb
DLM		 389 ret = BLK_STS_IOERR;
390 goto unlock;
dc4d137e
NC		 391 }
392
393 /*
394 * Regular writes must be at the write pointer position.
395 * Zone append writes are automatically issued at the write
396 * pointer and the position returned using the request or BIO
397 * sector.
398 */
399 if (append) {
400 sector = zone->wp;
aacae8c4 401 if (dev->queue_mode == NULL_Q_MQ)
dc4d137e 402 cmd->rq->__sector = sector;
aacae8c4
DLM		 403 else
404 cmd->bio->bi_iter.bi_sector = sector;
dc4d137e 405 } else if (sector != zone->wp) {
aa1c09cb
DLM		 406 ret = BLK_STS_IOERR;
407 goto unlock;
dc4d137e
NC		 408 }
409
aa1c09cb
DLM		 410 if (zone->wp + nr_sectors > zone->start + zone->capacity) {
411 ret = BLK_STS_IOERR;
412 goto unlock;
413 }
dc4d137e 414
2b8b7ed7
DLM		 415 if (zone->cond == BLK_ZONE_COND_CLOSED ||
416 zone->cond == BLK_ZONE_COND_EMPTY) {
417 null_lock_zone_res(dev);
418
419 ret = null_check_zone_resources(dev, zone);
420 if (ret != BLK_STS_OK) {
421 null_unlock_zone_res(dev);
422 goto unlock;
423 }
424 if (zone->cond == BLK_ZONE_COND_CLOSED) {
425 dev->nr_zones_closed--;
426 dev->nr_zones_imp_open++;
427 } else if (zone->cond == BLK_ZONE_COND_EMPTY) {
428 dev->nr_zones_imp_open++;
429 }
430
431 if (zone->cond != BLK_ZONE_COND_EXP_OPEN)
432 zone->cond = BLK_ZONE_COND_IMP_OPEN;
433
434 null_unlock_zone_res(dev);
dc4d137e 435 }
dc4d137e
NC		 436
437 ret = null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
438 if (ret != BLK_STS_OK)
aa1c09cb 439 goto unlock;
dc4d137e
NC		 440
441 zone->wp += nr_sectors;
442 if (zone->wp == zone->start + zone->capacity) {
2b8b7ed7 443 null_lock_zone_res(dev);
dc4d137e
NC		 444 if (zone->cond == BLK_ZONE_COND_EXP_OPEN)
445 dev->nr_zones_exp_open--;
446 else if (zone->cond == BLK_ZONE_COND_IMP_OPEN)
447 dev->nr_zones_imp_open--;
448 zone->cond = BLK_ZONE_COND_FULL;
2b8b7ed7 449 null_unlock_zone_res(dev);
dc4d137e 450 }
2b8b7ed7 451
aa1c09cb
DLM		 452 ret = BLK_STS_OK;
453
454unlock:
2b8b7ed7 455 null_unlock_zone(dev, zone);
aa1c09cb
DLM		 456
457 return ret;
dc4d137e
NC		 458}
459
2b8b7ed7
DLM		 460static blk_status_t null_open_zone(struct nullb_device *dev,
461 struct nullb_zone *zone)
dc4d137e 462{
2b8b7ed7 463 blk_status_t ret = BLK_STS_OK;
fd78874b 464
dc4d137e
NC		 465 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
466 return BLK_STS_IOERR;
467
2b8b7ed7
DLM		 468 null_lock_zone_res(dev);
469
dc4d137e
NC		 470 switch (zone->cond) {
471 case BLK_ZONE_COND_EXP_OPEN:
472 /* open operation on exp open is not an error */
2b8b7ed7 473 goto unlock;
dc4d137e 474 case BLK_ZONE_COND_EMPTY:
fd78874b
KB		 475 ret = null_check_zone_resources(dev, zone);
476 if (ret != BLK_STS_OK)
2b8b7ed7 477 goto unlock;
dc4d137e
NC		 478 break;
479 case BLK_ZONE_COND_IMP_OPEN:
480 dev->nr_zones_imp_open--;
481 break;
16c731fe 482 case BLK_ZONE_COND_CLOSED:
fd78874b
KB		 483 ret = null_check_zone_resources(dev, zone);
484 if (ret != BLK_STS_OK)
2b8b7ed7 485 goto unlock;
dc4d137e
NC		 486 dev->nr_zones_closed--;
487 break;
488 case BLK_ZONE_COND_FULL:
489 default:
2b8b7ed7
DLM		 490 ret = BLK_STS_IOERR;
491 goto unlock;
dc4d137e
NC		 492 }
493
494 zone->cond = BLK_ZONE_COND_EXP_OPEN;
495 dev->nr_zones_exp_open++;
ca4b2a01 496
2b8b7ed7
DLM		 497unlock:
498 null_unlock_zone_res(dev);
499
500 return ret;
dc4d137e
NC		 501}
502
2b8b7ed7
DLM		 503static blk_status_t null_close_zone(struct nullb_device *dev,
504 struct nullb_zone *zone)
dc4d137e 505{
fd78874b
KB		 506 blk_status_t ret;
507
dc4d137e
NC		 508 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
509 return BLK_STS_IOERR;
510
2b8b7ed7
DLM		 511 null_lock_zone_res(dev);
512 ret = __null_close_zone(dev, zone);
513 null_unlock_zone_res(dev);
514
515 return ret;
516}
517
518static blk_status_t null_finish_zone(struct nullb_device *dev,
519 struct nullb_zone *zone)
520{
521 blk_status_t ret = BLK_STS_OK;
522
523 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
524 return BLK_STS_IOERR;
525
526 null_lock_zone_res(dev);
527
dc4d137e
NC		 528 switch (zone->cond) {
529 case BLK_ZONE_COND_FULL:
530 /* finish operation on full is not an error */
2b8b7ed7 531 goto unlock;
dc4d137e 532 case BLK_ZONE_COND_EMPTY:
fd78874b
KB		 533 ret = null_check_zone_resources(dev, zone);
534 if (ret != BLK_STS_OK)
2b8b7ed7 535 goto unlock;
dc4d137e
NC		 536 break;
537 case BLK_ZONE_COND_IMP_OPEN:
538 dev->nr_zones_imp_open--;
539 break;
540 case BLK_ZONE_COND_EXP_OPEN:
541 dev->nr_zones_exp_open--;
542 break;
543 case BLK_ZONE_COND_CLOSED:
fd78874b
KB		 544 ret = null_check_zone_resources(dev, zone);
545 if (ret != BLK_STS_OK)
2b8b7ed7 546 goto unlock;
dc4d137e
NC		 547 dev->nr_zones_closed--;
548 break;
549 default:
2b8b7ed7
DLM		 550 ret = BLK_STS_IOERR;
551 goto unlock;
dc4d137e 552 }
089565fb 553
dc4d137e
NC		 554 zone->cond = BLK_ZONE_COND_FULL;
555 zone->wp = zone->start + zone->len;
ca4b2a01 556
2b8b7ed7
DLM		 557unlock:
558 null_unlock_zone_res(dev);
559
560 return ret;
dc4d137e
NC		 561}
562
2b8b7ed7
DLM		 563static blk_status_t null_reset_zone(struct nullb_device *dev,
564 struct nullb_zone *zone)
dc4d137e
NC		 565{
566 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
567 return BLK_STS_IOERR;
9dd44c7e 568
2b8b7ed7
DLM		 569 null_lock_zone_res(dev);
570
dc4d137e
NC		 571 switch (zone->cond) {
572 case BLK_ZONE_COND_EMPTY:
573 /* reset operation on empty is not an error */
2b8b7ed7 574 null_unlock_zone_res(dev);
9dd44c7e 575 return BLK_STS_OK;
dc4d137e
NC		 576 case BLK_ZONE_COND_IMP_OPEN:
577 dev->nr_zones_imp_open--;
578 break;
579 case BLK_ZONE_COND_EXP_OPEN:
580 dev->nr_zones_exp_open--;
581 break;
582 case BLK_ZONE_COND_CLOSED:
583 dev->nr_zones_closed--;
584 break;
585 case BLK_ZONE_COND_FULL:
586 break;
ca4b2a01 587 default:
2b8b7ed7 588 null_unlock_zone_res(dev);
fceb5d1b 589 return BLK_STS_IOERR;
ca4b2a01 590 }
dc4d137e
NC		 591
592 zone->cond = BLK_ZONE_COND_EMPTY;
593 zone->wp = zone->start;
594
2b8b7ed7
DLM		 595 null_unlock_zone_res(dev);
596
0ec4d913
DLM		 597 if (dev->memory_backed)
598 return null_handle_discard(dev, zone->start, zone->len);
599
dc4d137e 600 return BLK_STS_OK;
ca4b2a01
MB		 601}
602
ff07a02e 603static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_op op,
da644b2c 604 sector_t sector)
ca4b2a01
MB		 605{
606 struct nullb_device *dev = cmd->nq->dev;
aa1c09cb 607 unsigned int zone_no;
2b8b7ed7 608 struct nullb_zone *zone;
aa1c09cb 609 blk_status_t ret;
a61dbfb1
CK		 610 size_t i;
611
aa1c09cb 612 if (op == REQ_OP_ZONE_RESET_ALL) {
f9c91042
DLM		 613 for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
614 zone = &dev->zones[i];
2b8b7ed7 615 null_lock_zone(dev, zone);
f9c91042
DLM		 616 if (zone->cond != BLK_ZONE_COND_EMPTY) {
617 null_reset_zone(dev, zone);
618 trace_nullb_zone_op(cmd, i, zone->cond);
619 }
2b8b7ed7 620 null_unlock_zone(dev, zone);
f9c91042
DLM		 621 }
622 return BLK_STS_OK;
aa1c09cb
DLM		 623 }
624
625 zone_no = null_zone_no(dev, sector);
626 zone = &dev->zones[zone_no];
627
2b8b7ed7 628 null_lock_zone(dev, zone);
aa1c09cb
DLM		 629
630 switch (op) {
a61dbfb1 631 case REQ_OP_ZONE_RESET:
dc4d137e 632 ret = null_reset_zone(dev, zone);
a61dbfb1 633 break;
da644b2c 634 case REQ_OP_ZONE_OPEN:
dc4d137e 635 ret = null_open_zone(dev, zone);
da644b2c
AJ		 636 break;
637 case REQ_OP_ZONE_CLOSE:
dc4d137e 638 ret = null_close_zone(dev, zone);
da644b2c
AJ		 639 break;
640 case REQ_OP_ZONE_FINISH:
dc4d137e 641 ret = null_finish_zone(dev, zone);
da644b2c 642 break;
a61dbfb1 643 default:
aa1c09cb
DLM		 644 ret = BLK_STS_NOTSUPP;
645 break;
ea2c18e1 646 }
766c3297 647
dc4d137e
NC		 648 if (ret == BLK_STS_OK)
649 trace_nullb_zone_op(cmd, zone_no, zone->cond);
650
2b8b7ed7 651 null_unlock_zone(dev, zone);
aa1c09cb 652
dc4d137e 653 return ret;
fceb5d1b
CK		 654}
655
ff07a02e 656blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_op op,
9dd44c7e 657 sector_t sector, sector_t nr_sectors)
fceb5d1b 658{
2b8b7ed7
DLM		 659 struct nullb_device *dev;
660 struct nullb_zone *zone;
aa1c09cb 661 blk_status_t sts;
35bc10b2 662
fceb5d1b
CK		 663 switch (op) {
664 case REQ_OP_WRITE:
2b8b7ed7 665 return null_zone_write(cmd, sector, nr_sectors, false);
e0489ed5 666 case REQ_OP_ZONE_APPEND:
2b8b7ed7 667 return null_zone_write(cmd, sector, nr_sectors, true);
fceb5d1b
CK		 668 case REQ_OP_ZONE_RESET:
669 case REQ_OP_ZONE_RESET_ALL:
da644b2c
AJ		 670 case REQ_OP_ZONE_OPEN:
671 case REQ_OP_ZONE_CLOSE:
672 case REQ_OP_ZONE_FINISH:
2b8b7ed7 673 return null_zone_mgmt(cmd, op, sector);
fceb5d1b 674 default:
2b8b7ed7
DLM		 675 dev = cmd->nq->dev;
676 zone = &dev->zones[null_zone_no(dev, sector)];
677
678 null_lock_zone(dev, zone);
35bc10b2 679 sts = null_process_cmd(cmd, op, sector, nr_sectors);
2b8b7ed7
DLM		 680 null_unlock_zone(dev, zone);
681 return sts;
fceb5d1b 682 }
ca4b2a01 683}
Linux 6.x block layer and io_uring tree(s)