Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
322cbb50 CH |
2 | /* |
3 | * Portions Copyright (C) 1992 Drew Eckhardt | |
4 | */ | |
1da177e4 LT |
5 | #ifndef _LINUX_BLKDEV_H |
6 | #define _LINUX_BLKDEV_H | |
7 | ||
322cbb50 CH |
8 | #include <linux/types.h> |
9 | #include <linux/blk_types.h> | |
10 | #include <linux/device.h> | |
1da177e4 | 11 | #include <linux/list.h> |
320ae51f | 12 | #include <linux/llist.h> |
b296a6d5 | 13 | #include <linux/minmax.h> |
1da177e4 LT |
14 | #include <linux/timer.h> |
15 | #include <linux/workqueue.h> | |
1da177e4 | 16 | #include <linux/wait.h> |
1da177e4 | 17 | #include <linux/bio.h> |
3e6053d7 | 18 | #include <linux/gfp.h> |
322cbb50 | 19 | #include <linux/kdev_t.h> |
548bc8e1 | 20 | #include <linux/rcupdate.h> |
add703fd | 21 | #include <linux/percpu-refcount.h> |
6a0cb1bc | 22 | #include <linux/blkzoned.h> |
322cbb50 | 23 | #include <linux/sched.h> |
d97e594c | 24 | #include <linux/sbitmap.h> |
322cbb50 CH |
25 | #include <linux/uuid.h> |
26 | #include <linux/xarray.h> | |
f3a60882 | 27 | #include <linux/file.h> |
1da177e4 | 28 | |
de477254 | 29 | struct module; |
1da177e4 | 30 | struct request_queue; |
1da177e4 | 31 | struct elevator_queue; |
2056a782 | 32 | struct blk_trace; |
3d6392cf JA |
33 | struct request; |
34 | struct sg_io_hdr; | |
3c798398 | 35 | struct blkcg_gq; |
7c94e1c1 | 36 | struct blk_flush_queue; |
3e08773c | 37 | struct kiocb; |
bbd3e064 | 38 | struct pr_ops; |
a7905043 | 39 | struct rq_qos; |
34dbad5d OS |
40 | struct blk_queue_stats; |
41 | struct blk_stat_callback; | |
cb77cb5a | 42 | struct blk_crypto_profile; |
1da177e4 | 43 | |
322cbb50 | 44 | extern const struct device_type disk_type; |
cdb37f73 | 45 | extern const struct device_type part_type; |
f8c7511d | 46 | extern const struct class block_class; |
322cbb50 | 47 | |
8bd435b3 TH |
48 | /* |
49 | * Maximum number of blkcg policies allowed to be registered concurrently. | |
50 | * Defined here to simplify include dependency. | |
51 | */ | |
ec645dc9 | 52 | #define BLKCG_MAX_POLS 6 |
8bd435b3 | 53 | |
322cbb50 CH |
54 | #define DISK_MAX_PARTS 256 |
55 | #define DISK_NAME_LEN 32 | |
56 | ||
57 | #define PARTITION_META_INFO_VOLNAMELTH 64 | |
58 | /* | |
59 | * Enough for the string representation of any kind of UUID plus NULL. | |
60 | * EFI UUID is 36 characters. MSDOS UUID is 11 characters. | |
61 | */ | |
62 | #define PARTITION_META_INFO_UUIDLTH (UUID_STRING_LEN + 1) | |
63 | ||
64 | struct partition_meta_info { | |
65 | char uuid[PARTITION_META_INFO_UUIDLTH]; | |
66 | u8 volname[PARTITION_META_INFO_VOLNAMELTH]; | |
67 | }; | |
68 | ||
69 | /** | |
70 | * DOC: genhd capability flags | |
71 | * | |
72 | * ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to | |
73 | * removable media. When set, the device remains present even when media is not | |
74 | * inserted. Shall not be set for devices which are removed entirely when the | |
75 | * media is removed. | |
76 | * | |
77 | * ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events, | |
78 | * doesn't appear in sysfs, and can't be opened from userspace or using | |
79 | * blkdev_get*. Used for the underlying components of multipath devices. | |
80 | * | |
81 | * ``GENHD_FL_NO_PART``: partition support is disabled. The kernel will not | |
82 | * scan for partitions from add_disk, and users can't add partitions manually. | |
83 | * | |
84 | */ | |
85 | enum { | |
86 | GENHD_FL_REMOVABLE = 1 << 0, | |
87 | GENHD_FL_HIDDEN = 1 << 1, | |
88 | GENHD_FL_NO_PART = 1 << 2, | |
89 | }; | |
90 | ||
91 | enum { | |
92 | DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */ | |
93 | DISK_EVENT_EJECT_REQUEST = 1 << 1, /* eject requested */ | |
94 | }; | |
95 | ||
96 | enum { | |
97 | /* Poll even if events_poll_msecs is unset */ | |
98 | DISK_EVENT_FLAG_POLL = 1 << 0, | |
99 | /* Forward events to udev */ | |
100 | DISK_EVENT_FLAG_UEVENT = 1 << 1, | |
101 | /* Block event polling when open for exclusive write */ | |
102 | DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE = 1 << 2, | |
103 | }; | |
104 | ||
105 | struct disk_events; | |
106 | struct badblocks; | |
107 | ||
108 | struct blk_integrity { | |
109 | const struct blk_integrity_profile *profile; | |
110 | unsigned char flags; | |
111 | unsigned char tuple_size; | |
60d21aac | 112 | unsigned char pi_offset; |
322cbb50 CH |
113 | unsigned char interval_exp; |
114 | unsigned char tag_size; | |
115 | }; | |
116 | ||
05bdb996 CH |
117 | typedef unsigned int __bitwise blk_mode_t; |
118 | ||
119 | /* open for reading */ | |
120 | #define BLK_OPEN_READ ((__force blk_mode_t)(1 << 0)) | |
121 | /* open for writing */ | |
122 | #define BLK_OPEN_WRITE ((__force blk_mode_t)(1 << 1)) | |
123 | /* open exclusively (vs other exclusive openers */ | |
124 | #define BLK_OPEN_EXCL ((__force blk_mode_t)(1 << 2)) | |
125 | /* opened with O_NDELAY */ | |
126 | #define BLK_OPEN_NDELAY ((__force blk_mode_t)(1 << 3)) | |
127 | /* open for "writes" only for ioctls (specialy hack for floppy.c) */ | |
128 | #define BLK_OPEN_WRITE_IOCTL ((__force blk_mode_t)(1 << 4)) | |
ed5cc702 JK |
129 | /* open is exclusive wrt all other BLK_OPEN_WRITE opens to the device */ |
130 | #define BLK_OPEN_RESTRICT_WRITES ((__force blk_mode_t)(1 << 5)) | |
752863bd CH |
131 | /* return partition scanning errors */ |
132 | #define BLK_OPEN_STRICT_SCAN ((__force blk_mode_t)(1 << 6)) | |
05bdb996 | 133 | |
322cbb50 CH |
134 | struct gendisk { |
135 | /* | |
136 | * major/first_minor/minors should not be set by any new driver, the | |
137 | * block core will take care of allocating them automatically. | |
138 | */ | |
139 | int major; | |
140 | int first_minor; | |
141 | int minors; | |
142 | ||
143 | char disk_name[DISK_NAME_LEN]; /* name of major driver */ | |
144 | ||
145 | unsigned short events; /* supported events */ | |
146 | unsigned short event_flags; /* flags related to event processing */ | |
147 | ||
148 | struct xarray part_tbl; | |
149 | struct block_device *part0; | |
150 | ||
151 | const struct block_device_operations *fops; | |
152 | struct request_queue *queue; | |
153 | void *private_data; | |
154 | ||
46754bd0 CH |
155 | struct bio_set bio_split; |
156 | ||
322cbb50 CH |
157 | int flags; |
158 | unsigned long state; | |
159 | #define GD_NEED_PART_SCAN 0 | |
160 | #define GD_READ_ONLY 1 | |
161 | #define GD_DEAD 2 | |
162 | #define GD_NATIVE_CAPACITY 3 | |
76792055 | 163 | #define GD_ADDED 4 |
b9684a71 | 164 | #define GD_SUPPRESS_PART_SCAN 5 |
6f8191fd | 165 | #define GD_OWNS_QUEUE 6 |
322cbb50 CH |
166 | |
167 | struct mutex open_mutex; /* open/close mutex */ | |
168 | unsigned open_partitions; /* number of open partitions */ | |
169 | ||
170 | struct backing_dev_info *bdi; | |
2bd85221 | 171 | struct kobject queue_kobj; /* the queue/ directory */ |
322cbb50 CH |
172 | struct kobject *slave_dir; |
173 | #ifdef CONFIG_BLOCK_HOLDER_DEPRECATED | |
174 | struct list_head slave_bdevs; | |
175 | #endif | |
176 | struct timer_rand_state *random; | |
177 | atomic_t sync_io; /* RAID */ | |
178 | struct disk_events *ev; | |
d86e716a CH |
179 | |
180 | #ifdef CONFIG_BLK_DEV_ZONED | |
181 | /* | |
02ccd7c3 DLM |
182 | * Zoned block device information. Reads of this information must be |
183 | * protected with blk_queue_enter() / blk_queue_exit(). Modifying this | |
184 | * information is only allowed while no requests are being processed. | |
185 | * See also blk_mq_freeze_queue() and blk_mq_unfreeze_queue(). | |
d86e716a CH |
186 | */ |
187 | unsigned int nr_zones; | |
ecfe43b1 | 188 | unsigned int zone_capacity; |
d86e716a | 189 | unsigned long *conv_zones_bitmap; |
dd291d77 DLM |
190 | unsigned int zone_wplugs_hash_bits; |
191 | spinlock_t zone_wplugs_lock; | |
192 | struct mempool_s *zone_wplugs_pool; | |
193 | struct hlist_head *zone_wplugs_hash; | |
194 | struct list_head zone_wplugs_err_list; | |
195 | struct work_struct zone_wplugs_work; | |
a8f59e5a | 196 | struct workqueue_struct *zone_wplugs_wq; |
d86e716a CH |
197 | #endif /* CONFIG_BLK_DEV_ZONED */ |
198 | ||
322cbb50 CH |
199 | #if IS_ENABLED(CONFIG_CDROM) |
200 | struct cdrom_device_info *cdi; | |
201 | #endif | |
202 | int node_id; | |
203 | struct badblocks *bb; | |
204 | struct lockdep_map lockdep_map; | |
205 | u64 diskseq; | |
05bdb996 | 206 | blk_mode_t open_mode; |
6a27d28c CH |
207 | |
208 | /* | |
209 | * Independent sector access ranges. This is always NULL for | |
210 | * devices that do not have multiple independent access ranges. | |
211 | */ | |
212 | struct blk_independent_access_ranges *ia_ranges; | |
322cbb50 CH |
213 | }; |
214 | ||
215 | static inline bool disk_live(struct gendisk *disk) | |
216 | { | |
217 | return !inode_unhashed(disk->part0->bd_inode); | |
218 | } | |
219 | ||
dbdc1be3 CH |
220 | /** |
221 | * disk_openers - returns how many openers are there for a disk | |
222 | * @disk: disk to check | |
223 | * | |
224 | * This returns the number of openers for a disk. Note that this value is only | |
225 | * stable if disk->open_mutex is held. | |
226 | * | |
227 | * Note: Due to a quirk in the block layer open code, each open partition is | |
228 | * only counted once even if there are multiple openers. | |
229 | */ | |
230 | static inline unsigned int disk_openers(struct gendisk *disk) | |
231 | { | |
9acf381f | 232 | return atomic_read(&disk->part0->bd_openers); |
dbdc1be3 CH |
233 | } |
234 | ||
140ce28d CH |
235 | /** |
236 | * disk_has_partscan - return %true if partition scanning is enabled on a disk | |
237 | * @disk: disk to check | |
238 | * | |
239 | * Returns %true if partitions scanning is enabled for @disk, or %false if | |
240 | * partition scanning is disabled either permanently or temporarily. | |
241 | */ | |
242 | static inline bool disk_has_partscan(struct gendisk *disk) | |
243 | { | |
244 | return !(disk->flags & (GENHD_FL_NO_PART | GENHD_FL_HIDDEN)) && | |
245 | !test_bit(GD_SUPPRESS_PART_SCAN, &disk->state); | |
246 | } | |
247 | ||
322cbb50 CH |
248 | /* |
249 | * The gendisk is refcounted by the part0 block_device, and the bd_device | |
250 | * therein is also used for device model presentation in sysfs. | |
251 | */ | |
252 | #define dev_to_disk(device) \ | |
253 | (dev_to_bdev(device)->bd_disk) | |
254 | #define disk_to_dev(disk) \ | |
255 | (&((disk)->part0->bd_device)) | |
256 | ||
257 | #if IS_REACHABLE(CONFIG_CDROM) | |
258 | #define disk_to_cdi(disk) ((disk)->cdi) | |
259 | #else | |
260 | #define disk_to_cdi(disk) NULL | |
261 | #endif | |
262 | ||
263 | static inline dev_t disk_devt(struct gendisk *disk) | |
264 | { | |
265 | return MKDEV(disk->major, disk->first_minor); | |
266 | } | |
267 | ||
37ae5a0f | 268 | static inline int blk_validate_block_size(unsigned long bsize) |
570b1cac XY |
269 | { |
270 | if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize)) | |
271 | return -EINVAL; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
16458cf3 | 276 | static inline bool blk_op_is_passthrough(blk_opf_t op) |
14cb0dc6 | 277 | { |
da6269da | 278 | op &= REQ_OP_MASK; |
14cb0dc6 ML |
279 | return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT; |
280 | } | |
281 | ||
9bb33f24 CH |
282 | /* |
283 | * BLK_BOUNCE_NONE: never bounce (default) | |
284 | * BLK_BOUNCE_HIGH: bounce all highmem pages | |
285 | */ | |
286 | enum blk_bounce { | |
287 | BLK_BOUNCE_NONE, | |
288 | BLK_BOUNCE_HIGH, | |
289 | }; | |
290 | ||
025146e1 | 291 | struct queue_limits { |
9bb33f24 | 292 | enum blk_bounce bounce; |
025146e1 | 293 | unsigned long seg_boundary_mask; |
03100aad | 294 | unsigned long virt_boundary_mask; |
025146e1 MP |
295 | |
296 | unsigned int max_hw_sectors; | |
ca369d51 | 297 | unsigned int max_dev_sectors; |
762380ad | 298 | unsigned int chunk_sectors; |
025146e1 | 299 | unsigned int max_sectors; |
c9c77418 | 300 | unsigned int max_user_sectors; |
025146e1 | 301 | unsigned int max_segment_size; |
c72758f3 | 302 | unsigned int physical_block_size; |
ad6bf88a | 303 | unsigned int logical_block_size; |
c72758f3 MP |
304 | unsigned int alignment_offset; |
305 | unsigned int io_min; | |
306 | unsigned int io_opt; | |
67efc925 | 307 | unsigned int max_discard_sectors; |
0034af03 | 308 | unsigned int max_hw_discard_sectors; |
4f563a64 | 309 | unsigned int max_user_discard_sectors; |
44abff2c | 310 | unsigned int max_secure_erase_sectors; |
a6f0788e | 311 | unsigned int max_write_zeroes_sectors; |
0512a75b | 312 | unsigned int max_zone_append_sectors; |
86b37281 MP |
313 | unsigned int discard_granularity; |
314 | unsigned int discard_alignment; | |
a805a4fa | 315 | unsigned int zone_write_granularity; |
025146e1 | 316 | |
8a78362c | 317 | unsigned short max_segments; |
13f05c8d | 318 | unsigned short max_integrity_segments; |
1e739730 | 319 | unsigned short max_discard_segments; |
025146e1 | 320 | |
c72758f3 | 321 | unsigned char misaligned; |
86b37281 | 322 | unsigned char discard_misaligned; |
c78afc62 | 323 | unsigned char raid_partial_stripes_expensive; |
7437bb73 | 324 | bool zoned; |
8c4955c0 CH |
325 | unsigned int max_open_zones; |
326 | unsigned int max_active_zones; | |
c964d62f KB |
327 | |
328 | /* | |
329 | * Drivers that set dma_alignment to less than 511 must be prepared to | |
330 | * handle individual bvec's that are not a multiple of a SECTOR_SIZE | |
331 | * due to possible offsets. | |
332 | */ | |
333 | unsigned int dma_alignment; | |
025146e1 MP |
334 | }; |
335 | ||
d4100351 CH |
336 | typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx, |
337 | void *data); | |
338 | ||
d73e93b4 | 339 | void disk_set_zoned(struct gendisk *disk); |
27ba3e8f | 340 | |
d4100351 CH |
341 | #define BLK_ALL_ZONES ((unsigned int)-1) |
342 | int blkdev_report_zones(struct block_device *bdev, sector_t sector, | |
668bfeea CH |
343 | unsigned int nr_zones, report_zones_cb cb, void *data); |
344 | int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op, | |
71f4ecdb | 345 | sector_t sectors, sector_t nr_sectors); |
9b3c08b9 | 346 | int blk_revalidate_disk_zones(struct gendisk *disk); |
6a0cb1bc | 347 | |
a2247f19 DLM |
348 | /* |
349 | * Independent access ranges: struct blk_independent_access_range describes | |
350 | * a range of contiguous sectors that can be accessed using device command | |
351 | * execution resources that are independent from the resources used for | |
352 | * other access ranges. This is typically found with single-LUN multi-actuator | |
353 | * HDDs where each access range is served by a different set of heads. | |
354 | * The set of independent ranges supported by the device is defined using | |
355 | * struct blk_independent_access_ranges. The independent ranges must not overlap | |
356 | * and must include all sectors within the disk capacity (no sector holes | |
357 | * allowed). | |
358 | * For a device with multiple ranges, requests targeting sectors in different | |
359 | * ranges can be executed in parallel. A request can straddle an access range | |
360 | * boundary. | |
361 | */ | |
362 | struct blk_independent_access_range { | |
363 | struct kobject kobj; | |
a2247f19 DLM |
364 | sector_t sector; |
365 | sector_t nr_sectors; | |
366 | }; | |
367 | ||
368 | struct blk_independent_access_ranges { | |
369 | struct kobject kobj; | |
370 | bool sysfs_registered; | |
371 | unsigned int nr_ia_ranges; | |
372 | struct blk_independent_access_range ia_range[]; | |
373 | }; | |
374 | ||
d7b76301 | 375 | struct request_queue { |
0c734c5e JA |
376 | /* |
377 | * The queue owner gets to use this for whatever they like. | |
378 | * ll_rw_blk doesn't touch it. | |
379 | */ | |
380 | void *queuedata; | |
0549e87c | 381 | |
0c734c5e | 382 | struct elevator_queue *elevator; |
87760e5e | 383 | |
f8a5b122 | 384 | const struct blk_mq_ops *mq_ops; |
320ae51f | 385 | |
320ae51f | 386 | /* sw queues */ |
e6cdb092 | 387 | struct blk_mq_ctx __percpu *queue_ctx; |
320ae51f | 388 | |
0c734c5e JA |
389 | /* |
390 | * various queue flags, see QUEUE_* below | |
391 | */ | |
392 | unsigned long queue_flags; | |
393 | ||
394 | unsigned int rq_timeout; | |
395 | ||
d278d4a8 JA |
396 | unsigned int queue_depth; |
397 | ||
0c734c5e JA |
398 | refcount_t refs; |
399 | ||
320ae51f | 400 | /* hw dispatch queues */ |
320ae51f | 401 | unsigned int nr_hw_queues; |
0c734c5e | 402 | struct xarray hctx_table; |
320ae51f | 403 | |
0c734c5e | 404 | struct percpu_ref q_usage_counter; |
1da177e4 | 405 | |
0c734c5e | 406 | struct request *last_merge; |
a73f730d | 407 | |
0d945c1f | 408 | spinlock_t queue_lock; |
1da177e4 | 409 | |
0c734c5e | 410 | int quiesce_depth; |
d152c682 | 411 | |
0c734c5e | 412 | struct gendisk *disk; |
1da177e4 | 413 | |
320ae51f JA |
414 | /* |
415 | * mq queue kobject | |
416 | */ | |
1db4909e | 417 | struct kobject *mq_kobj; |
320ae51f | 418 | |
0c734c5e JA |
419 | struct queue_limits limits; |
420 | ||
ac6fc48c DW |
421 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
422 | struct blk_integrity integrity; | |
423 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
424 | ||
47fafbc7 | 425 | #ifdef CONFIG_PM |
6c954667 | 426 | struct device *dev; |
db04e18d | 427 | enum rpm_status rpm_status; |
6c954667 LM |
428 | #endif |
429 | ||
1da177e4 | 430 | /* |
0c734c5e JA |
431 | * Number of contexts that have called blk_set_pm_only(). If this |
432 | * counter is above zero then only RQF_PM requests are processed. | |
1da177e4 | 433 | */ |
0c734c5e JA |
434 | atomic_t pm_only; |
435 | ||
436 | struct blk_queue_stats *stats; | |
437 | struct rq_qos *rq_qos; | |
438 | struct mutex rq_qos_mutex; | |
439 | ||
440 | /* | |
441 | * ida allocated id for this queue. Used to index queues from | |
442 | * ioctx. | |
443 | */ | |
444 | int id; | |
1da177e4 | 445 | |
e3790c7d | 446 | unsigned int dma_pad_mask; |
1da177e4 | 447 | |
0c734c5e JA |
448 | /* |
449 | * queue settings | |
450 | */ | |
451 | unsigned long nr_requests; /* Max # of requests */ | |
452 | ||
1b262839 | 453 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
cb77cb5a | 454 | struct blk_crypto_profile *crypto_profile; |
20f01f16 | 455 | struct kobject *crypto_kobject; |
1b262839 ST |
456 | #endif |
457 | ||
242f9dcb | 458 | struct timer_list timeout; |
287922eb | 459 | struct work_struct timeout_work; |
242f9dcb | 460 | |
079a2e3e | 461 | atomic_t nr_active_requests_shared_tags; |
bccf5e26 | 462 | |
079a2e3e | 463 | struct blk_mq_tags *sched_shared_tags; |
d97e594c | 464 | |
a612fddf | 465 | struct list_head icq_list; |
1231039d CH |
466 | #ifdef CONFIG_BLK_CGROUP |
467 | DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS); | |
468 | struct blkcg_gq *root_blkg; | |
469 | struct list_head blkg_list; | |
470 | struct mutex blkcg_mutex; | |
471 | #endif | |
a612fddf | 472 | |
0c734c5e | 473 | int node; |
025146e1 | 474 | |
0c734c5e JA |
475 | spinlock_t requeue_lock; |
476 | struct list_head requeue_list; | |
477 | struct delayed_work requeue_work; | |
68c43f13 | 478 | |
6c5c9341 | 479 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
c780e86d | 480 | struct blk_trace __rcu *blk_trace; |
6c5c9341 | 481 | #endif |
1da177e4 | 482 | /* |
4913efe4 | 483 | * for flush operations |
1da177e4 | 484 | */ |
7c94e1c1 | 485 | struct blk_flush_queue *fq; |
9a67aa52 | 486 | struct list_head flush_list; |
483f4afc AV |
487 | |
488 | struct mutex sysfs_lock; | |
cecf5d87 | 489 | struct mutex sysfs_dir_lock; |
d690cb8a | 490 | struct mutex limits_lock; |
d351af01 | 491 | |
2f8f1336 ML |
492 | /* |
493 | * for reusing dead hctx instance in case of updating | |
494 | * nr_hw_queues | |
495 | */ | |
496 | struct list_head unused_hctx_list; | |
497 | spinlock_t unused_hctx_lock; | |
498 | ||
7996a8b5 | 499 | int mq_freeze_depth; |
d732580b | 500 | |
e43473b7 VG |
501 | #ifdef CONFIG_BLK_DEV_THROTTLING |
502 | /* Throttle data */ | |
503 | struct throtl_data *td; | |
504 | #endif | |
548bc8e1 | 505 | struct rcu_head rcu_head; |
320ae51f | 506 | wait_queue_head_t mq_freeze_wq; |
7996a8b5 BL |
507 | /* |
508 | * Protect concurrent access to q_usage_counter by | |
509 | * percpu_ref_kill() and percpu_ref_reinit(). | |
510 | */ | |
511 | struct mutex mq_freeze_lock; | |
0d2602ca JA |
512 | |
513 | struct blk_mq_tag_set *tag_set; | |
514 | struct list_head tag_set_list; | |
4593fdbe | 515 | |
07e4fead | 516 | struct dentry *debugfs_dir; |
d332ce09 | 517 | struct dentry *sched_debugfs_dir; |
cc56694f | 518 | struct dentry *rqos_debugfs_dir; |
5cf9c91b CH |
519 | /* |
520 | * Serializes all debugfs metadata operations using the above dentries. | |
521 | */ | |
522 | struct mutex debugfs_mutex; | |
07e4fead | 523 | |
4593fdbe | 524 | bool mq_sysfs_init_done; |
1da177e4 LT |
525 | }; |
526 | ||
bfe373f6 | 527 | /* Keep blk_queue_flag_name[] in sync with the definitions below */ |
eca7abf3 JA |
528 | #define QUEUE_FLAG_STOPPED 0 /* queue is stopped */ |
529 | #define QUEUE_FLAG_DYING 1 /* queue being torn down */ | |
eca7abf3 JA |
530 | #define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */ |
531 | #define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */ | |
532 | #define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */ | |
533 | #define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */ | |
534 | #define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */ | |
535 | #define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */ | |
eca7abf3 JA |
536 | #define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */ |
537 | #define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */ | |
3222d8c2 | 538 | #define QUEUE_FLAG_SYNCHRONOUS 11 /* always completes in submit context */ |
eca7abf3 | 539 | #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */ |
02d374f3 | 540 | #define QUEUE_FLAG_HW_WC 13 /* Write back caching supported */ |
eca7abf3 | 541 | #define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */ |
1cb039f3 | 542 | #define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */ |
eca7abf3 JA |
543 | #define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */ |
544 | #define QUEUE_FLAG_WC 17 /* Write back caching */ | |
545 | #define QUEUE_FLAG_FUA 18 /* device supports FUA writes */ | |
546 | #define QUEUE_FLAG_DAX 19 /* device supports DAX */ | |
547 | #define QUEUE_FLAG_STATS 20 /* track IO start and completion times */ | |
eca7abf3 | 548 | #define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */ |
eca7abf3 JA |
549 | #define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */ |
550 | #define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */ | |
e84e8f06 | 551 | #define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */ |
6f816b4b | 552 | #define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */ |
021a2446 MS |
553 | #define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */ |
554 | #define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */ | |
4d337ceb | 555 | #define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */ |
414dd48e | 556 | #define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/ |
797e7dbb | 557 | |
ca5eebda BF |
558 | #define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \ |
559 | (1UL << QUEUE_FLAG_SAME_COMP) | \ | |
560 | (1UL << QUEUE_FLAG_NOWAIT)) | |
94eddfbe | 561 | |
8814ce8a BVA |
562 | void blk_queue_flag_set(unsigned int flag, struct request_queue *q); |
563 | void blk_queue_flag_clear(unsigned int flag, struct request_queue *q); | |
564 | bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); | |
8814ce8a | 565 | |
1da177e4 | 566 | #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags) |
3f3299d5 | 567 | #define blk_queue_dying(q) test_bit(QUEUE_FLAG_DYING, &(q)->queue_flags) |
320ae51f | 568 | #define blk_queue_init_done(q) test_bit(QUEUE_FLAG_INIT_DONE, &(q)->queue_flags) |
ac9fafa1 | 569 | #define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags) |
488991e2 AB |
570 | #define blk_queue_noxmerges(q) \ |
571 | test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags) | |
a68bbddb | 572 | #define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags) |
1cb039f3 CH |
573 | #define blk_queue_stable_writes(q) \ |
574 | test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags) | |
bc58ba94 | 575 | #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) |
e2e1a148 | 576 | #define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags) |
e84e8f06 CK |
577 | #define blk_queue_zone_resetall(q) \ |
578 | test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags) | |
163d4baa | 579 | #define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags) |
49d92c0d LG |
580 | #define blk_queue_pci_p2pdma(q) \ |
581 | test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags) | |
6f816b4b TH |
582 | #ifdef CONFIG_BLK_RQ_ALLOC_TIME |
583 | #define blk_queue_rq_alloc_time(q) \ | |
584 | test_bit(QUEUE_FLAG_RQ_ALLOC_TIME, &(q)->queue_flags) | |
585 | #else | |
586 | #define blk_queue_rq_alloc_time(q) false | |
587 | #endif | |
1da177e4 | 588 | |
33659ebb CH |
589 | #define blk_noretry_request(rq) \ |
590 | ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \ | |
591 | REQ_FAILFAST_DRIVER)) | |
f4560ffe | 592 | #define blk_queue_quiesced(q) test_bit(QUEUE_FLAG_QUIESCED, &(q)->queue_flags) |
cd84a62e | 593 | #define blk_queue_pm_only(q) atomic_read(&(q)->pm_only) |
58c898ba | 594 | #define blk_queue_registered(q) test_bit(QUEUE_FLAG_REGISTERED, &(q)->queue_flags) |
4d337ceb | 595 | #define blk_queue_sq_sched(q) test_bit(QUEUE_FLAG_SQ_SCHED, &(q)->queue_flags) |
414dd48e CL |
596 | #define blk_queue_skip_tagset_quiesce(q) \ |
597 | test_bit(QUEUE_FLAG_SKIP_TAGSET_QUIESCE, &(q)->queue_flags) | |
c9254f2d | 598 | |
cd84a62e BVA |
599 | extern void blk_set_pm_only(struct request_queue *q); |
600 | extern void blk_clear_pm_only(struct request_queue *q); | |
33659ebb | 601 | |
1da177e4 LT |
602 | #define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist) |
603 | ||
3ab3a031 CH |
604 | #define dma_map_bvec(dev, bv, dir, attrs) \ |
605 | dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \ | |
606 | (dir), (attrs)) | |
607 | ||
344e9ffc | 608 | static inline bool queue_is_mq(struct request_queue *q) |
49fd524f | 609 | { |
a1ce35fa | 610 | return q->mq_ops; |
49fd524f JA |
611 | } |
612 | ||
52abca64 AS |
613 | #ifdef CONFIG_PM |
614 | static inline enum rpm_status queue_rpm_status(struct request_queue *q) | |
615 | { | |
616 | return q->rpm_status; | |
617 | } | |
618 | #else | |
619 | static inline enum rpm_status queue_rpm_status(struct request_queue *q) | |
620 | { | |
621 | return RPM_ACTIVE; | |
622 | } | |
623 | #endif | |
624 | ||
797476b8 DLM |
625 | static inline bool blk_queue_is_zoned(struct request_queue *q) |
626 | { | |
7437bb73 | 627 | return IS_ENABLED(CONFIG_BLK_DEV_ZONED) && q->limits.zoned; |
797476b8 DLM |
628 | } |
629 | ||
6a5ac984 | 630 | #ifdef CONFIG_BLK_DEV_ZONED |
668bfeea CH |
631 | unsigned int bdev_nr_zones(struct block_device *bdev); |
632 | ||
d86e716a | 633 | static inline unsigned int disk_nr_zones(struct gendisk *disk) |
965b652e | 634 | { |
d86e716a | 635 | return blk_queue_is_zoned(disk->queue) ? disk->nr_zones : 0; |
965b652e DLM |
636 | } |
637 | ||
d86e716a | 638 | static inline unsigned int disk_zone_no(struct gendisk *disk, sector_t sector) |
6cc77e9c | 639 | { |
d86e716a | 640 | if (!blk_queue_is_zoned(disk->queue)) |
6cc77e9c | 641 | return 0; |
d86e716a | 642 | return sector >> ilog2(disk->queue->limits.chunk_sectors); |
6cc77e9c CH |
643 | } |
644 | ||
982977df | 645 | static inline void disk_set_max_open_zones(struct gendisk *disk, |
e15864f8 NC |
646 | unsigned int max_open_zones) |
647 | { | |
8c4955c0 | 648 | disk->queue->limits.max_open_zones = max_open_zones; |
e15864f8 NC |
649 | } |
650 | ||
982977df | 651 | static inline void disk_set_max_active_zones(struct gendisk *disk, |
659bf827 NC |
652 | unsigned int max_active_zones) |
653 | { | |
8c4955c0 | 654 | disk->queue->limits.max_active_zones = max_active_zones; |
659bf827 NC |
655 | } |
656 | ||
1dc01720 CH |
657 | static inline unsigned int bdev_max_open_zones(struct block_device *bdev) |
658 | { | |
8c4955c0 | 659 | return bdev->bd_disk->queue->limits.max_open_zones; |
1dc01720 CH |
660 | } |
661 | ||
662 | static inline unsigned int bdev_max_active_zones(struct block_device *bdev) | |
659bf827 | 663 | { |
8c4955c0 | 664 | return bdev->bd_disk->queue->limits.max_active_zones; |
659bf827 | 665 | } |
1dc01720 | 666 | |
dd291d77 | 667 | bool blk_zone_plug_bio(struct bio *bio, unsigned int nr_segs); |
965b652e | 668 | #else /* CONFIG_BLK_DEV_ZONED */ |
668bfeea CH |
669 | static inline unsigned int bdev_nr_zones(struct block_device *bdev) |
670 | { | |
671 | return 0; | |
672 | } | |
673 | ||
d86e716a | 674 | static inline unsigned int disk_nr_zones(struct gendisk *disk) |
965b652e DLM |
675 | { |
676 | return 0; | |
677 | } | |
d86e716a | 678 | static inline unsigned int disk_zone_no(struct gendisk *disk, sector_t sector) |
02992df8 JT |
679 | { |
680 | return 0; | |
681 | } | |
1dc01720 | 682 | static inline unsigned int bdev_max_open_zones(struct block_device *bdev) |
e15864f8 NC |
683 | { |
684 | return 0; | |
685 | } | |
d86e716a | 686 | |
1dc01720 | 687 | static inline unsigned int bdev_max_active_zones(struct block_device *bdev) |
659bf827 NC |
688 | { |
689 | return 0; | |
690 | } | |
dd291d77 DLM |
691 | static inline bool blk_zone_plug_bio(struct bio *bio, unsigned int nr_segs) |
692 | { | |
693 | return false; | |
694 | } | |
6a5ac984 | 695 | #endif /* CONFIG_BLK_DEV_ZONED */ |
6cc77e9c | 696 | |
d278d4a8 JA |
697 | static inline unsigned int blk_queue_depth(struct request_queue *q) |
698 | { | |
699 | if (q->queue_depth) | |
700 | return q->queue_depth; | |
701 | ||
702 | return q->nr_requests; | |
703 | } | |
704 | ||
3d6392cf JA |
705 | /* |
706 | * default timeout for SG_IO if none specified | |
707 | */ | |
708 | #define BLK_DEFAULT_SG_TIMEOUT (60 * HZ) | |
f2f1fa78 | 709 | #define BLK_MIN_SG_TIMEOUT (7 * HZ) |
3d6392cf | 710 | |
5705f702 | 711 | /* This should not be used directly - use rq_for_each_segment */ |
1e428079 JA |
712 | #define for_each_bio(_bio) \ |
713 | for (; _bio; _bio = _bio->bi_next) | |
5705f702 | 714 | |
322cbb50 CH |
715 | int __must_check device_add_disk(struct device *parent, struct gendisk *disk, |
716 | const struct attribute_group **groups); | |
717 | static inline int __must_check add_disk(struct gendisk *disk) | |
718 | { | |
719 | return device_add_disk(NULL, disk, NULL); | |
720 | } | |
721 | void del_gendisk(struct gendisk *gp); | |
722 | void invalidate_disk(struct gendisk *disk); | |
723 | void set_disk_ro(struct gendisk *disk, bool read_only); | |
724 | void disk_uevent(struct gendisk *disk, enum kobject_action action); | |
725 | ||
726 | static inline int get_disk_ro(struct gendisk *disk) | |
727 | { | |
728 | return disk->part0->bd_read_only || | |
729 | test_bit(GD_READ_ONLY, &disk->state); | |
730 | } | |
731 | ||
732 | static inline int bdev_read_only(struct block_device *bdev) | |
733 | { | |
734 | return bdev->bd_read_only || get_disk_ro(bdev->bd_disk); | |
735 | } | |
736 | ||
737 | bool set_capacity_and_notify(struct gendisk *disk, sector_t size); | |
ab6860f6 | 738 | void disk_force_media_change(struct gendisk *disk); |
560e20e4 | 739 | void bdev_mark_dead(struct block_device *bdev, bool surprise); |
322cbb50 CH |
740 | |
741 | void add_disk_randomness(struct gendisk *disk) __latent_entropy; | |
742 | void rand_initialize_disk(struct gendisk *disk); | |
743 | ||
744 | static inline sector_t get_start_sect(struct block_device *bdev) | |
745 | { | |
746 | return bdev->bd_start_sect; | |
747 | } | |
748 | ||
749 | static inline sector_t bdev_nr_sectors(struct block_device *bdev) | |
750 | { | |
751 | return bdev->bd_nr_sectors; | |
752 | } | |
753 | ||
754 | static inline loff_t bdev_nr_bytes(struct block_device *bdev) | |
755 | { | |
756 | return (loff_t)bdev_nr_sectors(bdev) << SECTOR_SHIFT; | |
757 | } | |
758 | ||
759 | static inline sector_t get_capacity(struct gendisk *disk) | |
760 | { | |
761 | return bdev_nr_sectors(disk->part0); | |
762 | } | |
763 | ||
764 | static inline u64 sb_bdev_nr_blocks(struct super_block *sb) | |
765 | { | |
766 | return bdev_nr_sectors(sb->s_bdev) >> | |
767 | (sb->s_blocksize_bits - SECTOR_SHIFT); | |
768 | } | |
769 | ||
770 | int bdev_disk_changed(struct gendisk *disk, bool invalidate); | |
771 | ||
322cbb50 | 772 | void put_disk(struct gendisk *disk); |
74fa8f9c CH |
773 | struct gendisk *__blk_alloc_disk(struct queue_limits *lim, int node, |
774 | struct lock_class_key *lkclass); | |
322cbb50 CH |
775 | |
776 | /** | |
777 | * blk_alloc_disk - allocate a gendisk structure | |
74fa8f9c | 778 | * @lim: queue limits to be used for this disk. |
322cbb50 CH |
779 | * @node_id: numa node to allocate on |
780 | * | |
781 | * Allocate and pre-initialize a gendisk structure for use with BIO based | |
782 | * drivers. | |
783 | * | |
74fa8f9c CH |
784 | * Returns an ERR_PTR on error, else the allocated disk. |
785 | * | |
322cbb50 CH |
786 | * Context: can sleep |
787 | */ | |
74fa8f9c | 788 | #define blk_alloc_disk(lim, node_id) \ |
322cbb50 CH |
789 | ({ \ |
790 | static struct lock_class_key __key; \ | |
791 | \ | |
74fa8f9c | 792 | __blk_alloc_disk(lim, node_id, &__key); \ |
322cbb50 | 793 | }) |
322cbb50 CH |
794 | |
795 | int __register_blkdev(unsigned int major, const char *name, | |
796 | void (*probe)(dev_t devt)); | |
797 | #define register_blkdev(major, name) \ | |
798 | __register_blkdev(major, name, NULL) | |
799 | void unregister_blkdev(unsigned int major, const char *name); | |
800 | ||
444aa2c5 | 801 | bool disk_check_media_change(struct gendisk *disk); |
322cbb50 CH |
802 | void set_capacity(struct gendisk *disk, sector_t size); |
803 | ||
804 | #ifdef CONFIG_BLOCK_HOLDER_DEPRECATED | |
805 | int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); | |
806 | void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk); | |
322cbb50 CH |
807 | #else |
808 | static inline int bd_link_disk_holder(struct block_device *bdev, | |
809 | struct gendisk *disk) | |
810 | { | |
811 | return 0; | |
812 | } | |
813 | static inline void bd_unlink_disk_holder(struct block_device *bdev, | |
814 | struct gendisk *disk) | |
815 | { | |
816 | } | |
322cbb50 CH |
817 | #endif /* CONFIG_BLOCK_HOLDER_DEPRECATED */ |
818 | ||
819 | dev_t part_devt(struct gendisk *disk, u8 partno); | |
820 | void inc_diskseq(struct gendisk *disk); | |
322cbb50 | 821 | void blk_request_module(dev_t devt); |
2d4dc890 | 822 | |
1da177e4 LT |
823 | extern int blk_register_queue(struct gendisk *disk); |
824 | extern void blk_unregister_queue(struct gendisk *disk); | |
3e08773c | 825 | void submit_bio_noacct(struct bio *bio); |
5a97806f | 826 | struct bio *bio_split_to_limits(struct bio *bio); |
24b83deb | 827 | |
ef9e3fac | 828 | extern int blk_lld_busy(struct request_queue *q); |
9a95e4ef | 829 | extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags); |
2e6edc95 | 830 | extern void blk_queue_exit(struct request_queue *q); |
1da177e4 | 831 | extern void blk_sync_queue(struct request_queue *q); |
fb9b16e1 | 832 | |
e47bc4ed | 833 | /* Helper to convert REQ_OP_XXX to its string format XXX */ |
77e7ffd7 | 834 | extern const char *blk_op_str(enum req_op op); |
e47bc4ed | 835 | |
2a842aca CH |
836 | int blk_status_to_errno(blk_status_t status); |
837 | blk_status_t errno_to_blk_status(int errno); | |
7ba37927 | 838 | const char *blk_status_to_str(blk_status_t status); |
2a842aca | 839 | |
ef99b2d3 CH |
840 | /* only poll the hardware once, don't continue until a completion was found */ |
841 | #define BLK_POLL_ONESHOT (1 << 0) | |
5a72e899 JA |
842 | int bio_poll(struct bio *bio, struct io_comp_batch *iob, unsigned int flags); |
843 | int iocb_bio_iopoll(struct kiocb *kiocb, struct io_comp_batch *iob, | |
844 | unsigned int flags); | |
05229bee | 845 | |
165125e1 | 846 | static inline struct request_queue *bdev_get_queue(struct block_device *bdev) |
1da177e4 | 847 | { |
17220ca5 | 848 | return bdev->bd_queue; /* this is never NULL */ |
1da177e4 LT |
849 | } |
850 | ||
02694e86 CK |
851 | /* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */ |
852 | const char *blk_zone_cond_str(enum blk_zone_cond zone_cond); | |
853 | ||
d0ea6bde DLM |
854 | static inline unsigned int bio_zone_no(struct bio *bio) |
855 | { | |
d86e716a | 856 | return disk_zone_no(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector); |
d0ea6bde DLM |
857 | } |
858 | ||
b85a3c1b | 859 | static inline bool bio_straddles_zones(struct bio *bio) |
d0ea6bde | 860 | { |
b85a3c1b DLM |
861 | return bio_sectors(bio) && |
862 | bio_zone_no(bio) != | |
863 | disk_zone_no(bio->bi_bdev->bd_disk, bio_end_sector(bio) - 1); | |
d0ea6bde | 864 | } |
6cc77e9c | 865 | |
8689461b CH |
866 | /* |
867 | * Return how much of the chunk is left to be used for I/O at a given offset. | |
868 | */ | |
869 | static inline unsigned int blk_chunk_sectors_left(sector_t offset, | |
870 | unsigned int chunk_sectors) | |
871 | { | |
872 | if (unlikely(!is_power_of_2(chunk_sectors))) | |
873 | return chunk_sectors - sector_div(offset, chunk_sectors); | |
874 | return chunk_sectors - (offset & (chunk_sectors - 1)); | |
875 | } | |
876 | ||
d690cb8a CH |
877 | /** |
878 | * queue_limits_start_update - start an atomic update of queue limits | |
879 | * @q: queue to update | |
880 | * | |
881 | * This functions starts an atomic update of the queue limits. It takes a lock | |
882 | * to prevent other updates and returns a snapshot of the current limits that | |
883 | * the caller can modify. The caller must call queue_limits_commit_update() | |
884 | * to finish the update. | |
885 | * | |
886 | * Context: process context. The caller must have frozen the queue or ensured | |
887 | * that there is outstanding I/O by other means. | |
888 | */ | |
889 | static inline struct queue_limits | |
890 | queue_limits_start_update(struct request_queue *q) | |
891 | __acquires(q->limits_lock) | |
892 | { | |
893 | mutex_lock(&q->limits_lock); | |
894 | return q->limits; | |
895 | } | |
896 | int queue_limits_commit_update(struct request_queue *q, | |
897 | struct queue_limits *lim); | |
631d4efb | 898 | int queue_limits_set(struct request_queue *q, struct queue_limits *lim); |
d690cb8a | 899 | |
29306626 CH |
900 | /** |
901 | * queue_limits_cancel_update - cancel an atomic update of queue limits | |
902 | * @q: queue to update | |
903 | * | |
904 | * This functions cancels an atomic update of the queue limits started by | |
905 | * queue_limits_start_update() and should be used when an error occurs after | |
906 | * starting update. | |
907 | */ | |
908 | static inline void queue_limits_cancel_update(struct request_queue *q) | |
909 | { | |
910 | mutex_unlock(&q->limits_lock); | |
911 | } | |
912 | ||
1da177e4 LT |
913 | /* |
914 | * Access functions for manipulating queue properties | |
915 | */ | |
762380ad | 916 | extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int); |
44abff2c CH |
917 | void blk_queue_max_secure_erase_sectors(struct request_queue *q, |
918 | unsigned int max_sectors); | |
67efc925 CH |
919 | extern void blk_queue_max_discard_sectors(struct request_queue *q, |
920 | unsigned int max_discard_sectors); | |
a6f0788e CK |
921 | extern void blk_queue_max_write_zeroes_sectors(struct request_queue *q, |
922 | unsigned int max_write_same_sectors); | |
ad6bf88a | 923 | extern void blk_queue_logical_block_size(struct request_queue *, unsigned int); |
0512a75b KB |
924 | extern void blk_queue_max_zone_append_sectors(struct request_queue *q, |
925 | unsigned int max_zone_append_sectors); | |
892b6f90 | 926 | extern void blk_queue_physical_block_size(struct request_queue *, unsigned int); |
a805a4fa DLM |
927 | void blk_queue_zone_write_granularity(struct request_queue *q, |
928 | unsigned int size); | |
c72758f3 MP |
929 | extern void blk_queue_alignment_offset(struct request_queue *q, |
930 | unsigned int alignment); | |
471aa704 | 931 | void disk_update_readahead(struct gendisk *disk); |
7c958e32 | 932 | extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min); |
c72758f3 | 933 | extern void blk_queue_io_min(struct request_queue *q, unsigned int min); |
3c5820c7 | 934 | extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt); |
d278d4a8 | 935 | extern void blk_set_queue_depth(struct request_queue *q, unsigned int depth); |
b1bd055d | 936 | extern void blk_set_stacking_limits(struct queue_limits *lim); |
c72758f3 MP |
937 | extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, |
938 | sector_t offset); | |
c1373f1c CH |
939 | void queue_limits_stack_bdev(struct queue_limits *t, struct block_device *bdev, |
940 | sector_t offset, const char *pfx); | |
27f8221a | 941 | extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int); |
242f9dcb | 942 | extern void blk_queue_rq_timeout(struct request_queue *, unsigned int); |
93e9d8e8 | 943 | extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua); |
2e9bc346 | 944 | |
a2247f19 DLM |
945 | struct blk_independent_access_ranges * |
946 | disk_alloc_independent_access_ranges(struct gendisk *disk, int nr_ia_ranges); | |
947 | void disk_set_independent_access_ranges(struct gendisk *disk, | |
948 | struct blk_independent_access_ranges *iars); | |
949 | ||
09ac46c4 | 950 | bool __must_check blk_get_queue(struct request_queue *); |
165125e1 | 951 | extern void blk_put_queue(struct request_queue *); |
7a5428dc CH |
952 | |
953 | void blk_mark_disk_dead(struct gendisk *disk); | |
1da177e4 | 954 | |
1a4dcfa8 | 955 | #ifdef CONFIG_BLOCK |
316cc67d | 956 | /* |
75df7136 SJ |
957 | * blk_plug permits building a queue of related requests by holding the I/O |
958 | * fragments for a short period. This allows merging of sequential requests | |
959 | * into single larger request. As the requests are moved from a per-task list to | |
960 | * the device's request_queue in a batch, this results in improved scalability | |
961 | * as the lock contention for request_queue lock is reduced. | |
962 | * | |
963 | * It is ok not to disable preemption when adding the request to the plug list | |
008f75a2 CH |
964 | * or when attempting a merge. For details, please see schedule() where |
965 | * blk_flush_plug() is called. | |
316cc67d | 966 | */ |
73c10101 | 967 | struct blk_plug { |
bc490f81 | 968 | struct request *mq_list; /* blk-mq requests */ |
47c122e3 JA |
969 | |
970 | /* if ios_left is > 1, we can batch tag/rq allocations */ | |
971 | struct request *cached_rq; | |
da4c8c3d | 972 | u64 cur_ktime; |
47c122e3 JA |
973 | unsigned short nr_ios; |
974 | ||
5f0ed774 | 975 | unsigned short rq_count; |
47c122e3 | 976 | |
ce5b009c | 977 | bool multiple_queues; |
dc5fc361 | 978 | bool has_elevator; |
47c122e3 JA |
979 | |
980 | struct list_head cb_list; /* md requires an unplug callback */ | |
73c10101 | 981 | }; |
55c022bb | 982 | |
9cbb1750 | 983 | struct blk_plug_cb; |
74018dc3 | 984 | typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool); |
048c9374 N |
985 | struct blk_plug_cb { |
986 | struct list_head list; | |
9cbb1750 N |
987 | blk_plug_cb_fn callback; |
988 | void *data; | |
048c9374 | 989 | }; |
9cbb1750 N |
990 | extern struct blk_plug_cb *blk_check_plugged(blk_plug_cb_fn unplug, |
991 | void *data, int size); | |
73c10101 | 992 | extern void blk_start_plug(struct blk_plug *); |
47c122e3 | 993 | extern void blk_start_plug_nr_ios(struct blk_plug *, unsigned short); |
73c10101 | 994 | extern void blk_finish_plug(struct blk_plug *); |
73c10101 | 995 | |
aa8dccca CH |
996 | void __blk_flush_plug(struct blk_plug *plug, bool from_schedule); |
997 | static inline void blk_flush_plug(struct blk_plug *plug, bool async) | |
73c10101 | 998 | { |
aa8dccca CH |
999 | if (plug) |
1000 | __blk_flush_plug(plug, async); | |
73c10101 JA |
1001 | } |
1002 | ||
06b23f92 JA |
1003 | /* |
1004 | * tsk == current here | |
1005 | */ | |
1006 | static inline void blk_plug_invalidate_ts(struct task_struct *tsk) | |
1007 | { | |
1008 | struct blk_plug *plug = tsk->plug; | |
1009 | ||
1010 | if (plug) | |
1011 | plug->cur_ktime = 0; | |
1012 | current->flags &= ~PF_BLOCK_TS; | |
1013 | } | |
1014 | ||
c6bf3f0e | 1015 | int blkdev_issue_flush(struct block_device *bdev); |
1a4dcfa8 CH |
1016 | long nr_blockdev_pages(void); |
1017 | #else /* CONFIG_BLOCK */ | |
1018 | struct blk_plug { | |
1019 | }; | |
1020 | ||
47c122e3 JA |
1021 | static inline void blk_start_plug_nr_ios(struct blk_plug *plug, |
1022 | unsigned short nr_ios) | |
1023 | { | |
1024 | } | |
1025 | ||
1a4dcfa8 CH |
1026 | static inline void blk_start_plug(struct blk_plug *plug) |
1027 | { | |
1028 | } | |
1029 | ||
1030 | static inline void blk_finish_plug(struct blk_plug *plug) | |
1031 | { | |
1032 | } | |
1033 | ||
008f75a2 | 1034 | static inline void blk_flush_plug(struct blk_plug *plug, bool async) |
1a4dcfa8 CH |
1035 | { |
1036 | } | |
1037 | ||
06b23f92 JA |
1038 | static inline void blk_plug_invalidate_ts(struct task_struct *tsk) |
1039 | { | |
1040 | } | |
1a4dcfa8 | 1041 | |
c6bf3f0e | 1042 | static inline int blkdev_issue_flush(struct block_device *bdev) |
1a4dcfa8 CH |
1043 | { |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static inline long nr_blockdev_pages(void) | |
1048 | { | |
1049 | return 0; | |
1050 | } | |
1051 | #endif /* CONFIG_BLOCK */ | |
1052 | ||
71ac860a ML |
1053 | extern void blk_io_schedule(void); |
1054 | ||
44abff2c CH |
1055 | int blkdev_issue_discard(struct block_device *bdev, sector_t sector, |
1056 | sector_t nr_sects, gfp_t gfp_mask); | |
1057 | int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, | |
1058 | sector_t nr_sects, gfp_t gfp_mask, struct bio **biop); | |
1059 | int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector, | |
1060 | sector_t nr_sects, gfp_t gfp); | |
ee472d83 CH |
1061 | |
1062 | #define BLKDEV_ZERO_NOUNMAP (1 << 0) /* do not free blocks */ | |
cb365b96 | 1063 | #define BLKDEV_ZERO_NOFALLBACK (1 << 1) /* don't write explicit zeroes */ |
ee472d83 | 1064 | |
e73c23ff CK |
1065 | extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, |
1066 | sector_t nr_sects, gfp_t gfp_mask, struct bio **biop, | |
ee472d83 | 1067 | unsigned flags); |
3f14d792 | 1068 | extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, |
ee472d83 CH |
1069 | sector_t nr_sects, gfp_t gfp_mask, unsigned flags); |
1070 | ||
2cf6d26a CH |
1071 | static inline int sb_issue_discard(struct super_block *sb, sector_t block, |
1072 | sector_t nr_blocks, gfp_t gfp_mask, unsigned long flags) | |
fb2dce86 | 1073 | { |
233bde21 BVA |
1074 | return blkdev_issue_discard(sb->s_bdev, |
1075 | block << (sb->s_blocksize_bits - | |
1076 | SECTOR_SHIFT), | |
1077 | nr_blocks << (sb->s_blocksize_bits - | |
1078 | SECTOR_SHIFT), | |
44abff2c | 1079 | gfp_mask); |
fb2dce86 | 1080 | } |
e6fa0be6 | 1081 | static inline int sb_issue_zeroout(struct super_block *sb, sector_t block, |
a107e5a3 | 1082 | sector_t nr_blocks, gfp_t gfp_mask) |
e6fa0be6 LC |
1083 | { |
1084 | return blkdev_issue_zeroout(sb->s_bdev, | |
233bde21 BVA |
1085 | block << (sb->s_blocksize_bits - |
1086 | SECTOR_SHIFT), | |
1087 | nr_blocks << (sb->s_blocksize_bits - | |
1088 | SECTOR_SHIFT), | |
ee472d83 | 1089 | gfp_mask, 0); |
e6fa0be6 | 1090 | } |
1da177e4 | 1091 | |
fa01b1e9 CH |
1092 | static inline bool bdev_is_partition(struct block_device *bdev) |
1093 | { | |
1094 | return bdev->bd_partno; | |
1095 | } | |
1096 | ||
eb28d31b MP |
1097 | enum blk_default_limits { |
1098 | BLK_MAX_SEGMENTS = 128, | |
1099 | BLK_SAFE_MAX_SECTORS = 255, | |
eb28d31b MP |
1100 | BLK_MAX_SEGMENT_SIZE = 65536, |
1101 | BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL, | |
1102 | }; | |
0e435ac2 | 1103 | |
d6b9f4e6 CH |
1104 | /* |
1105 | * Default upper limit for the software max_sectors limit used for | |
1106 | * regular file system I/O. This can be increased through sysfs. | |
1107 | * | |
1108 | * Not to be confused with the max_hw_sector limit that is entirely | |
1109 | * controlled by the driver, usually based on hardware limits. | |
1110 | */ | |
1111 | #define BLK_DEF_MAX_SECTORS_CAP 2560u | |
0a26f327 | 1112 | |
af2c68fe | 1113 | static inline unsigned long queue_segment_boundary(const struct request_queue *q) |
ae03bf63 | 1114 | { |
025146e1 | 1115 | return q->limits.seg_boundary_mask; |
ae03bf63 MP |
1116 | } |
1117 | ||
af2c68fe | 1118 | static inline unsigned long queue_virt_boundary(const struct request_queue *q) |
03100aad KB |
1119 | { |
1120 | return q->limits.virt_boundary_mask; | |
1121 | } | |
1122 | ||
af2c68fe | 1123 | static inline unsigned int queue_max_sectors(const struct request_queue *q) |
ae03bf63 | 1124 | { |
025146e1 | 1125 | return q->limits.max_sectors; |
ae03bf63 MP |
1126 | } |
1127 | ||
547e2f70 CH |
1128 | static inline unsigned int queue_max_bytes(struct request_queue *q) |
1129 | { | |
1130 | return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9; | |
1131 | } | |
1132 | ||
af2c68fe | 1133 | static inline unsigned int queue_max_hw_sectors(const struct request_queue *q) |
ae03bf63 | 1134 | { |
025146e1 | 1135 | return q->limits.max_hw_sectors; |
ae03bf63 MP |
1136 | } |
1137 | ||
af2c68fe | 1138 | static inline unsigned short queue_max_segments(const struct request_queue *q) |
ae03bf63 | 1139 | { |
8a78362c | 1140 | return q->limits.max_segments; |
ae03bf63 MP |
1141 | } |
1142 | ||
af2c68fe | 1143 | static inline unsigned short queue_max_discard_segments(const struct request_queue *q) |
1e739730 CH |
1144 | { |
1145 | return q->limits.max_discard_segments; | |
1146 | } | |
1147 | ||
af2c68fe | 1148 | static inline unsigned int queue_max_segment_size(const struct request_queue *q) |
ae03bf63 | 1149 | { |
025146e1 | 1150 | return q->limits.max_segment_size; |
ae03bf63 MP |
1151 | } |
1152 | ||
ccdbf0aa | 1153 | static inline unsigned int queue_limits_max_zone_append_sectors(struct queue_limits *l) |
0512a75b | 1154 | { |
ccdbf0aa | 1155 | unsigned int max_sectors = min(l->chunk_sectors, l->max_hw_sectors); |
fe6f0cdc | 1156 | |
ccdbf0aa DLM |
1157 | return min_not_zero(l->max_zone_append_sectors, max_sectors); |
1158 | } | |
1159 | ||
1160 | static inline unsigned int queue_max_zone_append_sectors(struct request_queue *q) | |
1161 | { | |
1162 | if (!blk_queue_is_zoned(q)) | |
1163 | return 0; | |
1164 | ||
1165 | return queue_limits_max_zone_append_sectors(&q->limits); | |
1166 | } | |
fe6f0cdc | 1167 | |
ccdbf0aa DLM |
1168 | static inline bool queue_emulates_zone_append(struct request_queue *q) |
1169 | { | |
1170 | return blk_queue_is_zoned(q) && !q->limits.max_zone_append_sectors; | |
1171 | } | |
fe6f0cdc | 1172 | |
ccdbf0aa DLM |
1173 | static inline bool bdev_emulates_zone_append(struct block_device *bdev) |
1174 | { | |
1175 | return queue_emulates_zone_append(bdev_get_queue(bdev)); | |
0512a75b KB |
1176 | } |
1177 | ||
2aba0d19 CH |
1178 | static inline unsigned int |
1179 | bdev_max_zone_append_sectors(struct block_device *bdev) | |
1180 | { | |
1181 | return queue_max_zone_append_sectors(bdev_get_queue(bdev)); | |
1182 | } | |
1183 | ||
65ea1b66 NA |
1184 | static inline unsigned int bdev_max_segments(struct block_device *bdev) |
1185 | { | |
1186 | return queue_max_segments(bdev_get_queue(bdev)); | |
1187 | } | |
1188 | ||
ad6bf88a | 1189 | static inline unsigned queue_logical_block_size(const struct request_queue *q) |
1da177e4 LT |
1190 | { |
1191 | int retval = 512; | |
1192 | ||
025146e1 MP |
1193 | if (q && q->limits.logical_block_size) |
1194 | retval = q->limits.logical_block_size; | |
1da177e4 LT |
1195 | |
1196 | return retval; | |
1197 | } | |
1198 | ||
ad6bf88a | 1199 | static inline unsigned int bdev_logical_block_size(struct block_device *bdev) |
1da177e4 | 1200 | { |
e1defc4f | 1201 | return queue_logical_block_size(bdev_get_queue(bdev)); |
1da177e4 LT |
1202 | } |
1203 | ||
af2c68fe | 1204 | static inline unsigned int queue_physical_block_size(const struct request_queue *q) |
c72758f3 MP |
1205 | { |
1206 | return q->limits.physical_block_size; | |
1207 | } | |
1208 | ||
892b6f90 | 1209 | static inline unsigned int bdev_physical_block_size(struct block_device *bdev) |
ac481c20 MP |
1210 | { |
1211 | return queue_physical_block_size(bdev_get_queue(bdev)); | |
1212 | } | |
1213 | ||
af2c68fe | 1214 | static inline unsigned int queue_io_min(const struct request_queue *q) |
c72758f3 MP |
1215 | { |
1216 | return q->limits.io_min; | |
1217 | } | |
1218 | ||
ac481c20 MP |
1219 | static inline int bdev_io_min(struct block_device *bdev) |
1220 | { | |
1221 | return queue_io_min(bdev_get_queue(bdev)); | |
1222 | } | |
1223 | ||
af2c68fe | 1224 | static inline unsigned int queue_io_opt(const struct request_queue *q) |
c72758f3 MP |
1225 | { |
1226 | return q->limits.io_opt; | |
1227 | } | |
1228 | ||
ac481c20 MP |
1229 | static inline int bdev_io_opt(struct block_device *bdev) |
1230 | { | |
1231 | return queue_io_opt(bdev_get_queue(bdev)); | |
1232 | } | |
1233 | ||
a805a4fa DLM |
1234 | static inline unsigned int |
1235 | queue_zone_write_granularity(const struct request_queue *q) | |
1236 | { | |
1237 | return q->limits.zone_write_granularity; | |
1238 | } | |
1239 | ||
1240 | static inline unsigned int | |
1241 | bdev_zone_write_granularity(struct block_device *bdev) | |
1242 | { | |
1243 | return queue_zone_write_granularity(bdev_get_queue(bdev)); | |
1244 | } | |
1245 | ||
89098b07 | 1246 | int bdev_alignment_offset(struct block_device *bdev); |
5c4b4a5c | 1247 | unsigned int bdev_discard_alignment(struct block_device *bdev); |
c6e66634 | 1248 | |
cf0fbf89 CH |
1249 | static inline unsigned int bdev_max_discard_sectors(struct block_device *bdev) |
1250 | { | |
1251 | return bdev_get_queue(bdev)->limits.max_discard_sectors; | |
1252 | } | |
1253 | ||
7b47ef52 CH |
1254 | static inline unsigned int bdev_discard_granularity(struct block_device *bdev) |
1255 | { | |
1256 | return bdev_get_queue(bdev)->limits.discard_granularity; | |
1257 | } | |
1258 | ||
44abff2c CH |
1259 | static inline unsigned int |
1260 | bdev_max_secure_erase_sectors(struct block_device *bdev) | |
1261 | { | |
1262 | return bdev_get_queue(bdev)->limits.max_secure_erase_sectors; | |
1263 | } | |
1264 | ||
a6f0788e CK |
1265 | static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev) |
1266 | { | |
1267 | struct request_queue *q = bdev_get_queue(bdev); | |
1268 | ||
1269 | if (q) | |
1270 | return q->limits.max_write_zeroes_sectors; | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
10f0d2a5 CH |
1275 | static inline bool bdev_nonrot(struct block_device *bdev) |
1276 | { | |
1277 | return blk_queue_nonrot(bdev_get_queue(bdev)); | |
1278 | } | |
1279 | ||
3222d8c2 CH |
1280 | static inline bool bdev_synchronous(struct block_device *bdev) |
1281 | { | |
1282 | return test_bit(QUEUE_FLAG_SYNCHRONOUS, | |
1283 | &bdev_get_queue(bdev)->queue_flags); | |
1284 | } | |
1285 | ||
36d25489 CH |
1286 | static inline bool bdev_stable_writes(struct block_device *bdev) |
1287 | { | |
1288 | return test_bit(QUEUE_FLAG_STABLE_WRITES, | |
1289 | &bdev_get_queue(bdev)->queue_flags); | |
1290 | } | |
1291 | ||
08e688fd CH |
1292 | static inline bool bdev_write_cache(struct block_device *bdev) |
1293 | { | |
1294 | return test_bit(QUEUE_FLAG_WC, &bdev_get_queue(bdev)->queue_flags); | |
1295 | } | |
1296 | ||
a557e82e CH |
1297 | static inline bool bdev_fua(struct block_device *bdev) |
1298 | { | |
1299 | return test_bit(QUEUE_FLAG_FUA, &bdev_get_queue(bdev)->queue_flags); | |
1300 | } | |
1301 | ||
568ec936 CH |
1302 | static inline bool bdev_nowait(struct block_device *bdev) |
1303 | { | |
1304 | return test_bit(QUEUE_FLAG_NOWAIT, &bdev_get_queue(bdev)->queue_flags); | |
1305 | } | |
1306 | ||
797476b8 DLM |
1307 | static inline bool bdev_is_zoned(struct block_device *bdev) |
1308 | { | |
fea127b3 | 1309 | return blk_queue_is_zoned(bdev_get_queue(bdev)); |
797476b8 DLM |
1310 | } |
1311 | ||
d67ea690 PR |
1312 | static inline unsigned int bdev_zone_no(struct block_device *bdev, sector_t sec) |
1313 | { | |
1314 | return disk_zone_no(bdev->bd_disk, sec); | |
1315 | } | |
1316 | ||
113ab72e | 1317 | static inline sector_t bdev_zone_sectors(struct block_device *bdev) |
6a0cb1bc HR |
1318 | { |
1319 | struct request_queue *q = bdev_get_queue(bdev); | |
1320 | ||
de71973c CH |
1321 | if (!blk_queue_is_zoned(q)) |
1322 | return 0; | |
1323 | return q->limits.chunk_sectors; | |
6cc77e9c | 1324 | } |
6a0cb1bc | 1325 | |
e29b2100 PR |
1326 | static inline sector_t bdev_offset_from_zone_start(struct block_device *bdev, |
1327 | sector_t sector) | |
1328 | { | |
1329 | return sector & (bdev_zone_sectors(bdev) - 1); | |
1330 | } | |
1331 | ||
b85a3c1b DLM |
1332 | static inline sector_t bio_offset_from_zone_start(struct bio *bio) |
1333 | { | |
1334 | return bdev_offset_from_zone_start(bio->bi_bdev, | |
1335 | bio->bi_iter.bi_sector); | |
1336 | } | |
1337 | ||
e29b2100 PR |
1338 | static inline bool bdev_is_zone_start(struct block_device *bdev, |
1339 | sector_t sector) | |
1340 | { | |
1341 | return bdev_offset_from_zone_start(bdev, sector) == 0; | |
1342 | } | |
1343 | ||
af2c68fe | 1344 | static inline int queue_dma_alignment(const struct request_queue *q) |
1da177e4 | 1345 | { |
c964d62f | 1346 | return q ? q->limits.dma_alignment : 511; |
1da177e4 LT |
1347 | } |
1348 | ||
4a2dcc35 KB |
1349 | static inline unsigned int bdev_dma_alignment(struct block_device *bdev) |
1350 | { | |
1351 | return queue_dma_alignment(bdev_get_queue(bdev)); | |
1352 | } | |
1353 | ||
5debd969 KB |
1354 | static inline bool bdev_iter_is_aligned(struct block_device *bdev, |
1355 | struct iov_iter *iter) | |
1356 | { | |
1357 | return iov_iter_is_aligned(iter, bdev_dma_alignment(bdev), | |
1358 | bdev_logical_block_size(bdev) - 1); | |
1359 | } | |
1360 | ||
14417799 | 1361 | static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr, |
87904074 FT |
1362 | unsigned int len) |
1363 | { | |
1364 | unsigned int alignment = queue_dma_alignment(q) | q->dma_pad_mask; | |
14417799 | 1365 | return !(addr & alignment) && !(len & alignment); |
87904074 FT |
1366 | } |
1367 | ||
1da177e4 LT |
1368 | /* assumes size > 256 */ |
1369 | static inline unsigned int blksize_bits(unsigned int size) | |
1370 | { | |
adff2158 | 1371 | return order_base_2(size >> SECTOR_SHIFT) + SECTOR_SHIFT; |
1da177e4 LT |
1372 | } |
1373 | ||
2befb9e3 | 1374 | static inline unsigned int block_size(struct block_device *bdev) |
1da177e4 | 1375 | { |
6b7b181b | 1376 | return 1 << bdev->bd_inode->i_blkbits; |
1da177e4 LT |
1377 | } |
1378 | ||
59c3d45e | 1379 | int kblockd_schedule_work(struct work_struct *work); |
818cd1cb | 1380 | int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay); |
1da177e4 | 1381 | |
1da177e4 LT |
1382 | #define MODULE_ALIAS_BLOCKDEV(major,minor) \ |
1383 | MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor)) | |
1384 | #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \ | |
1385 | MODULE_ALIAS("block-major-" __stringify(major) "-*") | |
1386 | ||
d145dc23 ST |
1387 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
1388 | ||
cb77cb5a EB |
1389 | bool blk_crypto_register(struct blk_crypto_profile *profile, |
1390 | struct request_queue *q); | |
d145dc23 | 1391 | |
d145dc23 ST |
1392 | #else /* CONFIG_BLK_INLINE_ENCRYPTION */ |
1393 | ||
cb77cb5a EB |
1394 | static inline bool blk_crypto_register(struct blk_crypto_profile *profile, |
1395 | struct request_queue *q) | |
d145dc23 ST |
1396 | { |
1397 | return true; | |
1398 | } | |
1399 | ||
d145dc23 ST |
1400 | #endif /* CONFIG_BLK_INLINE_ENCRYPTION */ |
1401 | ||
9208d414 CH |
1402 | enum blk_unique_id { |
1403 | /* these match the Designator Types specified in SPC */ | |
1404 | BLK_UID_T10 = 1, | |
1405 | BLK_UID_EUI64 = 2, | |
1406 | BLK_UID_NAA = 3, | |
1407 | }; | |
1408 | ||
08f85851 | 1409 | struct block_device_operations { |
3e08773c | 1410 | void (*submit_bio)(struct bio *bio); |
69fe0f29 ML |
1411 | int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob, |
1412 | unsigned int flags); | |
05bdb996 | 1413 | int (*open)(struct gendisk *disk, blk_mode_t mode); |
ae220766 | 1414 | void (*release)(struct gendisk *disk); |
05bdb996 CH |
1415 | int (*ioctl)(struct block_device *bdev, blk_mode_t mode, |
1416 | unsigned cmd, unsigned long arg); | |
1417 | int (*compat_ioctl)(struct block_device *bdev, blk_mode_t mode, | |
1418 | unsigned cmd, unsigned long arg); | |
77ea887e TH |
1419 | unsigned int (*check_events) (struct gendisk *disk, |
1420 | unsigned int clearing); | |
c3e33e04 | 1421 | void (*unlock_native_capacity) (struct gendisk *); |
08f85851 | 1422 | int (*getgeo)(struct block_device *, struct hd_geometry *); |
e00adcad | 1423 | int (*set_read_only)(struct block_device *bdev, bool ro); |
76792055 | 1424 | void (*free_disk)(struct gendisk *disk); |
b3a27d05 NG |
1425 | /* this callback is with swap_lock and sometimes page table lock held */ |
1426 | void (*swap_slot_free_notify) (struct block_device *, unsigned long); | |
e76239a3 | 1427 | int (*report_zones)(struct gendisk *, sector_t sector, |
d4100351 | 1428 | unsigned int nr_zones, report_zones_cb cb, void *data); |
050a4f34 | 1429 | char *(*devnode)(struct gendisk *disk, umode_t *mode); |
9208d414 CH |
1430 | /* returns the length of the identifier or a negative errno: */ |
1431 | int (*get_unique_id)(struct gendisk *disk, u8 id[16], | |
1432 | enum blk_unique_id id_type); | |
08f85851 | 1433 | struct module *owner; |
bbd3e064 | 1434 | const struct pr_ops *pr_ops; |
0bdfbca8 DO |
1435 | |
1436 | /* | |
1437 | * Special callback for probing GPT entry at a given sector. | |
1438 | * Needed by Android devices, used by GPT scanner and MMC blk | |
1439 | * driver. | |
1440 | */ | |
1441 | int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector); | |
08f85851 AV |
1442 | }; |
1443 | ||
ee6a129d | 1444 | #ifdef CONFIG_COMPAT |
05bdb996 | 1445 | extern int blkdev_compat_ptr_ioctl(struct block_device *, blk_mode_t, |
ee6a129d AB |
1446 | unsigned int, unsigned long); |
1447 | #else | |
1448 | #define blkdev_compat_ptr_ioctl NULL | |
1449 | #endif | |
1450 | ||
0619317f JA |
1451 | static inline void blk_wake_io_task(struct task_struct *waiter) |
1452 | { | |
1453 | /* | |
1454 | * If we're polling, the task itself is doing the completions. For | |
1455 | * that case, we don't need to signal a wakeup, it's enough to just | |
1456 | * mark us as RUNNING. | |
1457 | */ | |
1458 | if (waiter == current) | |
1459 | __set_current_state(TASK_RUNNING); | |
1460 | else | |
1461 | wake_up_process(waiter); | |
1462 | } | |
1463 | ||
5f275713 | 1464 | unsigned long bdev_start_io_acct(struct block_device *bdev, enum req_op op, |
5f0614a5 | 1465 | unsigned long start_time); |
77e7ffd7 | 1466 | void bdev_end_io_acct(struct block_device *bdev, enum req_op op, |
5f275713 | 1467 | unsigned int sectors, unsigned long start_time); |
956d510e | 1468 | |
99dfc43e CH |
1469 | unsigned long bio_start_io_acct(struct bio *bio); |
1470 | void bio_end_io_acct_remapped(struct bio *bio, unsigned long start_time, | |
1471 | struct block_device *orig_bdev); | |
956d510e CH |
1472 | |
1473 | /** | |
1474 | * bio_end_io_acct - end I/O accounting for bio based drivers | |
1475 | * @bio: bio to end account for | |
b42c1fc3 | 1476 | * @start_time: start time returned by bio_start_io_acct() |
956d510e CH |
1477 | */ |
1478 | static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time) | |
1479 | { | |
99dfc43e | 1480 | return bio_end_io_acct_remapped(bio, start_time, bio->bi_bdev); |
956d510e | 1481 | } |
956d510e | 1482 | |
3f1266f1 CH |
1483 | int bdev_read_only(struct block_device *bdev); |
1484 | int set_blocksize(struct block_device *bdev, int size); | |
1485 | ||
4e7b5671 | 1486 | int lookup_bdev(const char *pathname, dev_t *dev); |
3f1266f1 CH |
1487 | |
1488 | void blkdev_show(struct seq_file *seqf, off_t offset); | |
1489 | ||
1490 | #define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */ | |
1491 | #define BDEVT_SIZE 10 /* Largest string for MAJ:MIN for blkdev */ | |
1492 | #ifdef CONFIG_BLOCK | |
1493 | #define BLKDEV_MAJOR_MAX 512 | |
1494 | #else | |
1495 | #define BLKDEV_MAJOR_MAX 0 | |
1496 | #endif | |
1497 | ||
0718afd4 | 1498 | struct blk_holder_ops { |
d8530de5 | 1499 | void (*mark_dead)(struct block_device *bdev, bool surprise); |
2142b88c CH |
1500 | |
1501 | /* | |
1502 | * Sync the file system mounted on the block device. | |
1503 | */ | |
1504 | void (*sync)(struct block_device *bdev); | |
a30561a9 CB |
1505 | |
1506 | /* | |
1507 | * Freeze the file system mounted on the block device. | |
1508 | */ | |
1509 | int (*freeze)(struct block_device *bdev); | |
1510 | ||
1511 | /* | |
1512 | * Thaw the file system mounted on the block device. | |
1513 | */ | |
1514 | int (*thaw)(struct block_device *bdev); | |
0718afd4 CH |
1515 | }; |
1516 | ||
e419cf3e CB |
1517 | /* |
1518 | * For filesystems using @fs_holder_ops, the @holder argument passed to | |
1519 | * helpers used to open and claim block devices via | |
1520 | * bd_prepare_to_claim() must point to a superblock. | |
1521 | */ | |
7ecd0b6f CH |
1522 | extern const struct blk_holder_ops fs_holder_ops; |
1523 | ||
3f0b3e78 CH |
1524 | /* |
1525 | * Return the correct open flags for blkdev_get_by_* for super block flags | |
1526 | * as stored in sb->s_flags. | |
1527 | */ | |
1528 | #define sb_open_mode(flags) \ | |
6f861765 JK |
1529 | (BLK_OPEN_READ | BLK_OPEN_RESTRICT_WRITES | \ |
1530 | (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE)) | |
3f0b3e78 | 1531 | |
f3a60882 CB |
1532 | struct file *bdev_file_open_by_dev(dev_t dev, blk_mode_t mode, void *holder, |
1533 | const struct blk_holder_ops *hops); | |
1534 | struct file *bdev_file_open_by_path(const char *path, blk_mode_t mode, | |
1535 | void *holder, const struct blk_holder_ops *hops); | |
0718afd4 CH |
1536 | int bd_prepare_to_claim(struct block_device *bdev, void *holder, |
1537 | const struct blk_holder_ops *hops); | |
37c3fc9a | 1538 | void bd_abort_claiming(struct block_device *bdev, void *holder); |
3f1266f1 | 1539 | |
22ae8ce8 CH |
1540 | /* just for blk-cgroup, don't use elsewhere */ |
1541 | struct block_device *blkdev_get_no_open(dev_t dev); | |
1542 | void blkdev_put_no_open(struct block_device *bdev); | |
1543 | ||
621c1f42 | 1544 | struct block_device *I_BDEV(struct inode *inode); |
f3a60882 | 1545 | struct block_device *file_bdev(struct file *bdev_file); |
3f1266f1 CH |
1546 | |
1547 | #ifdef CONFIG_BLOCK | |
1548 | void invalidate_bdev(struct block_device *bdev); | |
1549 | int sync_blockdev(struct block_device *bdev); | |
97d6fb1b | 1550 | int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend); |
70164eb6 | 1551 | int sync_blockdev_nowait(struct block_device *bdev); |
1e03a36b | 1552 | void sync_bdevs(bool wait); |
2d985f8c | 1553 | void bdev_statx_dioalign(struct inode *inode, struct kstat *stat); |
322cbb50 | 1554 | void printk_all_partitions(void); |
2577f53f | 1555 | int __init early_lookup_bdev(const char *pathname, dev_t *dev); |
3f1266f1 CH |
1556 | #else |
1557 | static inline void invalidate_bdev(struct block_device *bdev) | |
1558 | { | |
1559 | } | |
1560 | static inline int sync_blockdev(struct block_device *bdev) | |
1561 | { | |
1562 | return 0; | |
1563 | } | |
70164eb6 CH |
1564 | static inline int sync_blockdev_nowait(struct block_device *bdev) |
1565 | { | |
1566 | return 0; | |
1567 | } | |
1e03a36b CH |
1568 | static inline void sync_bdevs(bool wait) |
1569 | { | |
1570 | } | |
2d985f8c EB |
1571 | static inline void bdev_statx_dioalign(struct inode *inode, struct kstat *stat) |
1572 | { | |
1573 | } | |
322cbb50 CH |
1574 | static inline void printk_all_partitions(void) |
1575 | { | |
1576 | } | |
cf056a43 CH |
1577 | static inline int early_lookup_bdev(const char *pathname, dev_t *dev) |
1578 | { | |
1579 | return -EINVAL; | |
1580 | } | |
322cbb50 CH |
1581 | #endif /* CONFIG_BLOCK */ |
1582 | ||
982c3b30 CB |
1583 | int bdev_freeze(struct block_device *bdev); |
1584 | int bdev_thaw(struct block_device *bdev); | |
22650a99 | 1585 | void bdev_fput(struct file *bdev_file); |
3f1266f1 | 1586 | |
5a72e899 JA |
1587 | struct io_comp_batch { |
1588 | struct request *req_list; | |
1589 | bool need_ts; | |
1590 | void (*complete)(struct io_comp_batch *); | |
1591 | }; | |
1592 | ||
1593 | #define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { } | |
1594 | ||
3f1266f1 | 1595 | #endif /* _LINUX_BLKDEV_H */ |