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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> | |
1da177e4 | 27 | |
de477254 | 28 | struct module; |
1da177e4 | 29 | struct request_queue; |
1da177e4 | 30 | struct elevator_queue; |
2056a782 | 31 | struct blk_trace; |
3d6392cf JA |
32 | struct request; |
33 | struct sg_io_hdr; | |
3c798398 | 34 | struct blkcg_gq; |
7c94e1c1 | 35 | struct blk_flush_queue; |
3e08773c | 36 | struct kiocb; |
bbd3e064 | 37 | struct pr_ops; |
a7905043 | 38 | struct rq_qos; |
34dbad5d OS |
39 | struct blk_queue_stats; |
40 | struct blk_stat_callback; | |
cb77cb5a | 41 | struct blk_crypto_profile; |
1da177e4 | 42 | |
322cbb50 | 43 | extern const struct device_type disk_type; |
cdb37f73 | 44 | extern const struct device_type part_type; |
322cbb50 CH |
45 | extern struct class block_class; |
46 | ||
8bd435b3 TH |
47 | /* |
48 | * Maximum number of blkcg policies allowed to be registered concurrently. | |
49 | * Defined here to simplify include dependency. | |
50 | */ | |
ec645dc9 | 51 | #define BLKCG_MAX_POLS 6 |
8bd435b3 | 52 | |
322cbb50 CH |
53 | #define DISK_MAX_PARTS 256 |
54 | #define DISK_NAME_LEN 32 | |
55 | ||
56 | #define PARTITION_META_INFO_VOLNAMELTH 64 | |
57 | /* | |
58 | * Enough for the string representation of any kind of UUID plus NULL. | |
59 | * EFI UUID is 36 characters. MSDOS UUID is 11 characters. | |
60 | */ | |
61 | #define PARTITION_META_INFO_UUIDLTH (UUID_STRING_LEN + 1) | |
62 | ||
63 | struct partition_meta_info { | |
64 | char uuid[PARTITION_META_INFO_UUIDLTH]; | |
65 | u8 volname[PARTITION_META_INFO_VOLNAMELTH]; | |
66 | }; | |
67 | ||
68 | /** | |
69 | * DOC: genhd capability flags | |
70 | * | |
71 | * ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to | |
72 | * removable media. When set, the device remains present even when media is not | |
73 | * inserted. Shall not be set for devices which are removed entirely when the | |
74 | * media is removed. | |
75 | * | |
76 | * ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events, | |
77 | * doesn't appear in sysfs, and can't be opened from userspace or using | |
78 | * blkdev_get*. Used for the underlying components of multipath devices. | |
79 | * | |
80 | * ``GENHD_FL_NO_PART``: partition support is disabled. The kernel will not | |
81 | * scan for partitions from add_disk, and users can't add partitions manually. | |
82 | * | |
83 | */ | |
84 | enum { | |
85 | GENHD_FL_REMOVABLE = 1 << 0, | |
86 | GENHD_FL_HIDDEN = 1 << 1, | |
87 | GENHD_FL_NO_PART = 1 << 2, | |
88 | }; | |
89 | ||
90 | enum { | |
91 | DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */ | |
92 | DISK_EVENT_EJECT_REQUEST = 1 << 1, /* eject requested */ | |
93 | }; | |
94 | ||
95 | enum { | |
96 | /* Poll even if events_poll_msecs is unset */ | |
97 | DISK_EVENT_FLAG_POLL = 1 << 0, | |
98 | /* Forward events to udev */ | |
99 | DISK_EVENT_FLAG_UEVENT = 1 << 1, | |
100 | /* Block event polling when open for exclusive write */ | |
101 | DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE = 1 << 2, | |
102 | }; | |
103 | ||
104 | struct disk_events; | |
105 | struct badblocks; | |
106 | ||
107 | struct blk_integrity { | |
108 | const struct blk_integrity_profile *profile; | |
109 | unsigned char flags; | |
110 | unsigned char tuple_size; | |
111 | unsigned char interval_exp; | |
112 | unsigned char tag_size; | |
113 | }; | |
114 | ||
05bdb996 CH |
115 | typedef unsigned int __bitwise blk_mode_t; |
116 | ||
117 | /* open for reading */ | |
118 | #define BLK_OPEN_READ ((__force blk_mode_t)(1 << 0)) | |
119 | /* open for writing */ | |
120 | #define BLK_OPEN_WRITE ((__force blk_mode_t)(1 << 1)) | |
121 | /* open exclusively (vs other exclusive openers */ | |
122 | #define BLK_OPEN_EXCL ((__force blk_mode_t)(1 << 2)) | |
123 | /* opened with O_NDELAY */ | |
124 | #define BLK_OPEN_NDELAY ((__force blk_mode_t)(1 << 3)) | |
125 | /* open for "writes" only for ioctls (specialy hack for floppy.c) */ | |
126 | #define BLK_OPEN_WRITE_IOCTL ((__force blk_mode_t)(1 << 4)) | |
127 | ||
322cbb50 CH |
128 | struct gendisk { |
129 | /* | |
130 | * major/first_minor/minors should not be set by any new driver, the | |
131 | * block core will take care of allocating them automatically. | |
132 | */ | |
133 | int major; | |
134 | int first_minor; | |
135 | int minors; | |
136 | ||
137 | char disk_name[DISK_NAME_LEN]; /* name of major driver */ | |
138 | ||
139 | unsigned short events; /* supported events */ | |
140 | unsigned short event_flags; /* flags related to event processing */ | |
141 | ||
142 | struct xarray part_tbl; | |
143 | struct block_device *part0; | |
144 | ||
145 | const struct block_device_operations *fops; | |
146 | struct request_queue *queue; | |
147 | void *private_data; | |
148 | ||
46754bd0 CH |
149 | struct bio_set bio_split; |
150 | ||
322cbb50 CH |
151 | int flags; |
152 | unsigned long state; | |
153 | #define GD_NEED_PART_SCAN 0 | |
154 | #define GD_READ_ONLY 1 | |
155 | #define GD_DEAD 2 | |
156 | #define GD_NATIVE_CAPACITY 3 | |
76792055 | 157 | #define GD_ADDED 4 |
b9684a71 | 158 | #define GD_SUPPRESS_PART_SCAN 5 |
6f8191fd | 159 | #define GD_OWNS_QUEUE 6 |
322cbb50 CH |
160 | |
161 | struct mutex open_mutex; /* open/close mutex */ | |
162 | unsigned open_partitions; /* number of open partitions */ | |
163 | ||
164 | struct backing_dev_info *bdi; | |
2bd85221 | 165 | struct kobject queue_kobj; /* the queue/ directory */ |
322cbb50 CH |
166 | struct kobject *slave_dir; |
167 | #ifdef CONFIG_BLOCK_HOLDER_DEPRECATED | |
168 | struct list_head slave_bdevs; | |
169 | #endif | |
170 | struct timer_rand_state *random; | |
171 | atomic_t sync_io; /* RAID */ | |
172 | struct disk_events *ev; | |
d86e716a CH |
173 | |
174 | #ifdef CONFIG_BLK_DEV_ZONED | |
175 | /* | |
176 | * Zoned block device information for request dispatch control. | |
177 | * nr_zones is the total number of zones of the device. This is always | |
178 | * 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones | |
179 | * bits which indicates if a zone is conventional (bit set) or | |
180 | * sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones | |
181 | * bits which indicates if a zone is write locked, that is, if a write | |
182 | * request targeting the zone was dispatched. | |
183 | * | |
184 | * Reads of this information must be protected with blk_queue_enter() / | |
185 | * blk_queue_exit(). Modifying this information is only allowed while | |
186 | * no requests are being processed. See also blk_mq_freeze_queue() and | |
187 | * blk_mq_unfreeze_queue(). | |
188 | */ | |
189 | unsigned int nr_zones; | |
190 | unsigned int max_open_zones; | |
191 | unsigned int max_active_zones; | |
192 | unsigned long *conv_zones_bitmap; | |
193 | unsigned long *seq_zones_wlock; | |
194 | #endif /* CONFIG_BLK_DEV_ZONED */ | |
195 | ||
322cbb50 CH |
196 | #if IS_ENABLED(CONFIG_CDROM) |
197 | struct cdrom_device_info *cdi; | |
198 | #endif | |
199 | int node_id; | |
200 | struct badblocks *bb; | |
201 | struct lockdep_map lockdep_map; | |
202 | u64 diskseq; | |
05bdb996 | 203 | blk_mode_t open_mode; |
6a27d28c CH |
204 | |
205 | /* | |
206 | * Independent sector access ranges. This is always NULL for | |
207 | * devices that do not have multiple independent access ranges. | |
208 | */ | |
209 | struct blk_independent_access_ranges *ia_ranges; | |
322cbb50 CH |
210 | }; |
211 | ||
212 | static inline bool disk_live(struct gendisk *disk) | |
213 | { | |
214 | return !inode_unhashed(disk->part0->bd_inode); | |
215 | } | |
216 | ||
dbdc1be3 CH |
217 | /** |
218 | * disk_openers - returns how many openers are there for a disk | |
219 | * @disk: disk to check | |
220 | * | |
221 | * This returns the number of openers for a disk. Note that this value is only | |
222 | * stable if disk->open_mutex is held. | |
223 | * | |
224 | * Note: Due to a quirk in the block layer open code, each open partition is | |
225 | * only counted once even if there are multiple openers. | |
226 | */ | |
227 | static inline unsigned int disk_openers(struct gendisk *disk) | |
228 | { | |
9acf381f | 229 | return atomic_read(&disk->part0->bd_openers); |
dbdc1be3 CH |
230 | } |
231 | ||
322cbb50 CH |
232 | /* |
233 | * The gendisk is refcounted by the part0 block_device, and the bd_device | |
234 | * therein is also used for device model presentation in sysfs. | |
235 | */ | |
236 | #define dev_to_disk(device) \ | |
237 | (dev_to_bdev(device)->bd_disk) | |
238 | #define disk_to_dev(disk) \ | |
239 | (&((disk)->part0->bd_device)) | |
240 | ||
241 | #if IS_REACHABLE(CONFIG_CDROM) | |
242 | #define disk_to_cdi(disk) ((disk)->cdi) | |
243 | #else | |
244 | #define disk_to_cdi(disk) NULL | |
245 | #endif | |
246 | ||
247 | static inline dev_t disk_devt(struct gendisk *disk) | |
248 | { | |
249 | return MKDEV(disk->major, disk->first_minor); | |
250 | } | |
251 | ||
37ae5a0f | 252 | static inline int blk_validate_block_size(unsigned long bsize) |
570b1cac XY |
253 | { |
254 | if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize)) | |
255 | return -EINVAL; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
16458cf3 | 260 | static inline bool blk_op_is_passthrough(blk_opf_t op) |
14cb0dc6 | 261 | { |
da6269da | 262 | op &= REQ_OP_MASK; |
14cb0dc6 ML |
263 | return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT; |
264 | } | |
265 | ||
797476b8 DLM |
266 | /* |
267 | * Zoned block device models (zoned limit). | |
3093a479 CH |
268 | * |
269 | * Note: This needs to be ordered from the least to the most severe | |
270 | * restrictions for the inheritance in blk_stack_limits() to work. | |
797476b8 DLM |
271 | */ |
272 | enum blk_zoned_model { | |
3093a479 CH |
273 | BLK_ZONED_NONE = 0, /* Regular block device */ |
274 | BLK_ZONED_HA, /* Host-aware zoned block device */ | |
275 | BLK_ZONED_HM, /* Host-managed zoned block device */ | |
797476b8 DLM |
276 | }; |
277 | ||
9bb33f24 CH |
278 | /* |
279 | * BLK_BOUNCE_NONE: never bounce (default) | |
280 | * BLK_BOUNCE_HIGH: bounce all highmem pages | |
281 | */ | |
282 | enum blk_bounce { | |
283 | BLK_BOUNCE_NONE, | |
284 | BLK_BOUNCE_HIGH, | |
285 | }; | |
286 | ||
025146e1 | 287 | struct queue_limits { |
9bb33f24 | 288 | enum blk_bounce bounce; |
025146e1 | 289 | unsigned long seg_boundary_mask; |
03100aad | 290 | unsigned long virt_boundary_mask; |
025146e1 MP |
291 | |
292 | unsigned int max_hw_sectors; | |
ca369d51 | 293 | unsigned int max_dev_sectors; |
762380ad | 294 | unsigned int chunk_sectors; |
025146e1 | 295 | unsigned int max_sectors; |
c9c77418 | 296 | unsigned int max_user_sectors; |
025146e1 | 297 | unsigned int max_segment_size; |
c72758f3 | 298 | unsigned int physical_block_size; |
ad6bf88a | 299 | unsigned int logical_block_size; |
c72758f3 MP |
300 | unsigned int alignment_offset; |
301 | unsigned int io_min; | |
302 | unsigned int io_opt; | |
67efc925 | 303 | unsigned int max_discard_sectors; |
0034af03 | 304 | unsigned int max_hw_discard_sectors; |
44abff2c | 305 | unsigned int max_secure_erase_sectors; |
a6f0788e | 306 | unsigned int max_write_zeroes_sectors; |
0512a75b | 307 | unsigned int max_zone_append_sectors; |
86b37281 MP |
308 | unsigned int discard_granularity; |
309 | unsigned int discard_alignment; | |
a805a4fa | 310 | unsigned int zone_write_granularity; |
025146e1 | 311 | |
8a78362c | 312 | unsigned short max_segments; |
13f05c8d | 313 | unsigned short max_integrity_segments; |
1e739730 | 314 | unsigned short max_discard_segments; |
025146e1 | 315 | |
c72758f3 | 316 | unsigned char misaligned; |
86b37281 | 317 | unsigned char discard_misaligned; |
c78afc62 | 318 | unsigned char raid_partial_stripes_expensive; |
797476b8 | 319 | enum blk_zoned_model zoned; |
c964d62f KB |
320 | |
321 | /* | |
322 | * Drivers that set dma_alignment to less than 511 must be prepared to | |
323 | * handle individual bvec's that are not a multiple of a SECTOR_SIZE | |
324 | * due to possible offsets. | |
325 | */ | |
326 | unsigned int dma_alignment; | |
025146e1 MP |
327 | }; |
328 | ||
d4100351 CH |
329 | typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx, |
330 | void *data); | |
331 | ||
6b2bd274 | 332 | void disk_set_zoned(struct gendisk *disk, enum blk_zoned_model model); |
27ba3e8f | 333 | |
d4100351 CH |
334 | #define BLK_ALL_ZONES ((unsigned int)-1) |
335 | int blkdev_report_zones(struct block_device *bdev, sector_t sector, | |
668bfeea CH |
336 | unsigned int nr_zones, report_zones_cb cb, void *data); |
337 | int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op, | |
338 | sector_t sectors, sector_t nr_sectors, gfp_t gfp_mask); | |
e732671a | 339 | int blk_revalidate_disk_zones(struct gendisk *disk, |
668bfeea | 340 | void (*update_driver_data)(struct gendisk *disk)); |
6a0cb1bc | 341 | |
a2247f19 DLM |
342 | /* |
343 | * Independent access ranges: struct blk_independent_access_range describes | |
344 | * a range of contiguous sectors that can be accessed using device command | |
345 | * execution resources that are independent from the resources used for | |
346 | * other access ranges. This is typically found with single-LUN multi-actuator | |
347 | * HDDs where each access range is served by a different set of heads. | |
348 | * The set of independent ranges supported by the device is defined using | |
349 | * struct blk_independent_access_ranges. The independent ranges must not overlap | |
350 | * and must include all sectors within the disk capacity (no sector holes | |
351 | * allowed). | |
352 | * For a device with multiple ranges, requests targeting sectors in different | |
353 | * ranges can be executed in parallel. A request can straddle an access range | |
354 | * boundary. | |
355 | */ | |
356 | struct blk_independent_access_range { | |
357 | struct kobject kobj; | |
a2247f19 DLM |
358 | sector_t sector; |
359 | sector_t nr_sectors; | |
360 | }; | |
361 | ||
362 | struct blk_independent_access_ranges { | |
363 | struct kobject kobj; | |
364 | bool sysfs_registered; | |
365 | unsigned int nr_ia_ranges; | |
366 | struct blk_independent_access_range ia_range[]; | |
367 | }; | |
368 | ||
d7b76301 | 369 | struct request_queue { |
0c734c5e JA |
370 | /* |
371 | * The queue owner gets to use this for whatever they like. | |
372 | * ll_rw_blk doesn't touch it. | |
373 | */ | |
374 | void *queuedata; | |
0549e87c | 375 | |
0c734c5e | 376 | struct elevator_queue *elevator; |
87760e5e | 377 | |
f8a5b122 | 378 | const struct blk_mq_ops *mq_ops; |
320ae51f | 379 | |
320ae51f | 380 | /* sw queues */ |
e6cdb092 | 381 | struct blk_mq_ctx __percpu *queue_ctx; |
320ae51f | 382 | |
0c734c5e JA |
383 | /* |
384 | * various queue flags, see QUEUE_* below | |
385 | */ | |
386 | unsigned long queue_flags; | |
387 | ||
388 | unsigned int rq_timeout; | |
389 | ||
d278d4a8 JA |
390 | unsigned int queue_depth; |
391 | ||
0c734c5e JA |
392 | refcount_t refs; |
393 | ||
320ae51f | 394 | /* hw dispatch queues */ |
320ae51f | 395 | unsigned int nr_hw_queues; |
0c734c5e | 396 | struct xarray hctx_table; |
320ae51f | 397 | |
0c734c5e | 398 | struct percpu_ref q_usage_counter; |
1da177e4 | 399 | |
0c734c5e | 400 | struct request *last_merge; |
a73f730d | 401 | |
0d945c1f | 402 | spinlock_t queue_lock; |
1da177e4 | 403 | |
0c734c5e | 404 | int quiesce_depth; |
d152c682 | 405 | |
0c734c5e | 406 | struct gendisk *disk; |
1da177e4 | 407 | |
320ae51f JA |
408 | /* |
409 | * mq queue kobject | |
410 | */ | |
1db4909e | 411 | struct kobject *mq_kobj; |
320ae51f | 412 | |
0c734c5e JA |
413 | struct queue_limits limits; |
414 | ||
ac6fc48c DW |
415 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
416 | struct blk_integrity integrity; | |
417 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
418 | ||
47fafbc7 | 419 | #ifdef CONFIG_PM |
6c954667 | 420 | struct device *dev; |
db04e18d | 421 | enum rpm_status rpm_status; |
6c954667 LM |
422 | #endif |
423 | ||
1da177e4 | 424 | /* |
0c734c5e JA |
425 | * Number of contexts that have called blk_set_pm_only(). If this |
426 | * counter is above zero then only RQF_PM requests are processed. | |
1da177e4 | 427 | */ |
0c734c5e JA |
428 | atomic_t pm_only; |
429 | ||
430 | struct blk_queue_stats *stats; | |
431 | struct rq_qos *rq_qos; | |
432 | struct mutex rq_qos_mutex; | |
433 | ||
434 | /* | |
435 | * ida allocated id for this queue. Used to index queues from | |
436 | * ioctx. | |
437 | */ | |
438 | int id; | |
1da177e4 | 439 | |
e3790c7d | 440 | unsigned int dma_pad_mask; |
1da177e4 | 441 | |
0c734c5e JA |
442 | /* |
443 | * queue settings | |
444 | */ | |
445 | unsigned long nr_requests; /* Max # of requests */ | |
446 | ||
1b262839 | 447 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
cb77cb5a | 448 | struct blk_crypto_profile *crypto_profile; |
20f01f16 | 449 | struct kobject *crypto_kobject; |
1b262839 ST |
450 | #endif |
451 | ||
242f9dcb | 452 | struct timer_list timeout; |
287922eb | 453 | struct work_struct timeout_work; |
242f9dcb | 454 | |
079a2e3e | 455 | atomic_t nr_active_requests_shared_tags; |
bccf5e26 | 456 | |
0c734c5e JA |
457 | unsigned int required_elevator_features; |
458 | ||
079a2e3e | 459 | struct blk_mq_tags *sched_shared_tags; |
d97e594c | 460 | |
a612fddf | 461 | struct list_head icq_list; |
1231039d CH |
462 | #ifdef CONFIG_BLK_CGROUP |
463 | DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS); | |
464 | struct blkcg_gq *root_blkg; | |
465 | struct list_head blkg_list; | |
466 | struct mutex blkcg_mutex; | |
467 | #endif | |
a612fddf | 468 | |
0c734c5e | 469 | int node; |
025146e1 | 470 | |
0c734c5e JA |
471 | spinlock_t requeue_lock; |
472 | struct list_head requeue_list; | |
473 | struct delayed_work requeue_work; | |
68c43f13 | 474 | |
6c5c9341 | 475 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
c780e86d | 476 | struct blk_trace __rcu *blk_trace; |
6c5c9341 | 477 | #endif |
1da177e4 | 478 | /* |
4913efe4 | 479 | * for flush operations |
1da177e4 | 480 | */ |
7c94e1c1 | 481 | struct blk_flush_queue *fq; |
9a67aa52 | 482 | struct list_head flush_list; |
483f4afc AV |
483 | |
484 | struct mutex sysfs_lock; | |
cecf5d87 | 485 | struct mutex sysfs_dir_lock; |
d351af01 | 486 | |
2f8f1336 ML |
487 | /* |
488 | * for reusing dead hctx instance in case of updating | |
489 | * nr_hw_queues | |
490 | */ | |
491 | struct list_head unused_hctx_list; | |
492 | spinlock_t unused_hctx_lock; | |
493 | ||
7996a8b5 | 494 | int mq_freeze_depth; |
d732580b | 495 | |
e43473b7 VG |
496 | #ifdef CONFIG_BLK_DEV_THROTTLING |
497 | /* Throttle data */ | |
498 | struct throtl_data *td; | |
499 | #endif | |
548bc8e1 | 500 | struct rcu_head rcu_head; |
320ae51f | 501 | wait_queue_head_t mq_freeze_wq; |
7996a8b5 BL |
502 | /* |
503 | * Protect concurrent access to q_usage_counter by | |
504 | * percpu_ref_kill() and percpu_ref_reinit(). | |
505 | */ | |
506 | struct mutex mq_freeze_lock; | |
0d2602ca JA |
507 | |
508 | struct blk_mq_tag_set *tag_set; | |
509 | struct list_head tag_set_list; | |
4593fdbe | 510 | |
07e4fead | 511 | struct dentry *debugfs_dir; |
d332ce09 | 512 | struct dentry *sched_debugfs_dir; |
cc56694f | 513 | struct dentry *rqos_debugfs_dir; |
5cf9c91b CH |
514 | /* |
515 | * Serializes all debugfs metadata operations using the above dentries. | |
516 | */ | |
517 | struct mutex debugfs_mutex; | |
07e4fead | 518 | |
4593fdbe | 519 | bool mq_sysfs_init_done; |
1da177e4 LT |
520 | }; |
521 | ||
bfe373f6 | 522 | /* Keep blk_queue_flag_name[] in sync with the definitions below */ |
eca7abf3 JA |
523 | #define QUEUE_FLAG_STOPPED 0 /* queue is stopped */ |
524 | #define QUEUE_FLAG_DYING 1 /* queue being torn down */ | |
eca7abf3 JA |
525 | #define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */ |
526 | #define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */ | |
527 | #define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */ | |
528 | #define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */ | |
529 | #define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */ | |
530 | #define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */ | |
eca7abf3 JA |
531 | #define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */ |
532 | #define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */ | |
3222d8c2 | 533 | #define QUEUE_FLAG_SYNCHRONOUS 11 /* always completes in submit context */ |
eca7abf3 | 534 | #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */ |
43c9835b | 535 | #define QUEUE_FLAG_HW_WC 18 /* Write back caching supported */ |
eca7abf3 | 536 | #define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */ |
1cb039f3 | 537 | #define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */ |
eca7abf3 JA |
538 | #define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */ |
539 | #define QUEUE_FLAG_WC 17 /* Write back caching */ | |
540 | #define QUEUE_FLAG_FUA 18 /* device supports FUA writes */ | |
541 | #define QUEUE_FLAG_DAX 19 /* device supports DAX */ | |
542 | #define QUEUE_FLAG_STATS 20 /* track IO start and completion times */ | |
eca7abf3 | 543 | #define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */ |
eca7abf3 JA |
544 | #define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */ |
545 | #define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */ | |
e84e8f06 | 546 | #define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */ |
6f816b4b | 547 | #define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */ |
021a2446 MS |
548 | #define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */ |
549 | #define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */ | |
4d337ceb | 550 | #define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */ |
414dd48e | 551 | #define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/ |
797e7dbb | 552 | |
ca5eebda BF |
553 | #define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \ |
554 | (1UL << QUEUE_FLAG_SAME_COMP) | \ | |
555 | (1UL << QUEUE_FLAG_NOWAIT)) | |
94eddfbe | 556 | |
8814ce8a BVA |
557 | void blk_queue_flag_set(unsigned int flag, struct request_queue *q); |
558 | void blk_queue_flag_clear(unsigned int flag, struct request_queue *q); | |
559 | bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); | |
8814ce8a | 560 | |
1da177e4 | 561 | #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags) |
3f3299d5 | 562 | #define blk_queue_dying(q) test_bit(QUEUE_FLAG_DYING, &(q)->queue_flags) |
320ae51f | 563 | #define blk_queue_init_done(q) test_bit(QUEUE_FLAG_INIT_DONE, &(q)->queue_flags) |
ac9fafa1 | 564 | #define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags) |
488991e2 AB |
565 | #define blk_queue_noxmerges(q) \ |
566 | test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags) | |
a68bbddb | 567 | #define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags) |
1cb039f3 CH |
568 | #define blk_queue_stable_writes(q) \ |
569 | test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags) | |
bc58ba94 | 570 | #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) |
e2e1a148 | 571 | #define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags) |
e84e8f06 CK |
572 | #define blk_queue_zone_resetall(q) \ |
573 | test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags) | |
163d4baa | 574 | #define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags) |
49d92c0d LG |
575 | #define blk_queue_pci_p2pdma(q) \ |
576 | test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags) | |
6f816b4b TH |
577 | #ifdef CONFIG_BLK_RQ_ALLOC_TIME |
578 | #define blk_queue_rq_alloc_time(q) \ | |
579 | test_bit(QUEUE_FLAG_RQ_ALLOC_TIME, &(q)->queue_flags) | |
580 | #else | |
581 | #define blk_queue_rq_alloc_time(q) false | |
582 | #endif | |
1da177e4 | 583 | |
33659ebb CH |
584 | #define blk_noretry_request(rq) \ |
585 | ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \ | |
586 | REQ_FAILFAST_DRIVER)) | |
f4560ffe | 587 | #define blk_queue_quiesced(q) test_bit(QUEUE_FLAG_QUIESCED, &(q)->queue_flags) |
cd84a62e | 588 | #define blk_queue_pm_only(q) atomic_read(&(q)->pm_only) |
58c898ba | 589 | #define blk_queue_registered(q) test_bit(QUEUE_FLAG_REGISTERED, &(q)->queue_flags) |
4d337ceb | 590 | #define blk_queue_sq_sched(q) test_bit(QUEUE_FLAG_SQ_SCHED, &(q)->queue_flags) |
414dd48e CL |
591 | #define blk_queue_skip_tagset_quiesce(q) \ |
592 | test_bit(QUEUE_FLAG_SKIP_TAGSET_QUIESCE, &(q)->queue_flags) | |
c9254f2d | 593 | |
cd84a62e BVA |
594 | extern void blk_set_pm_only(struct request_queue *q); |
595 | extern void blk_clear_pm_only(struct request_queue *q); | |
33659ebb | 596 | |
1da177e4 LT |
597 | #define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist) |
598 | ||
3ab3a031 CH |
599 | #define dma_map_bvec(dev, bv, dir, attrs) \ |
600 | dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \ | |
601 | (dir), (attrs)) | |
602 | ||
344e9ffc | 603 | static inline bool queue_is_mq(struct request_queue *q) |
49fd524f | 604 | { |
a1ce35fa | 605 | return q->mq_ops; |
49fd524f JA |
606 | } |
607 | ||
52abca64 AS |
608 | #ifdef CONFIG_PM |
609 | static inline enum rpm_status queue_rpm_status(struct request_queue *q) | |
610 | { | |
611 | return q->rpm_status; | |
612 | } | |
613 | #else | |
614 | static inline enum rpm_status queue_rpm_status(struct request_queue *q) | |
615 | { | |
616 | return RPM_ACTIVE; | |
617 | } | |
618 | #endif | |
619 | ||
797476b8 DLM |
620 | static inline enum blk_zoned_model |
621 | blk_queue_zoned_model(struct request_queue *q) | |
622 | { | |
6fcd6695 CH |
623 | if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) |
624 | return q->limits.zoned; | |
625 | return BLK_ZONED_NONE; | |
797476b8 DLM |
626 | } |
627 | ||
628 | static inline bool blk_queue_is_zoned(struct request_queue *q) | |
629 | { | |
630 | switch (blk_queue_zoned_model(q)) { | |
631 | case BLK_ZONED_HA: | |
632 | case BLK_ZONED_HM: | |
633 | return true; | |
634 | default: | |
635 | return false; | |
636 | } | |
637 | } | |
638 | ||
6a5ac984 | 639 | #ifdef CONFIG_BLK_DEV_ZONED |
668bfeea CH |
640 | unsigned int bdev_nr_zones(struct block_device *bdev); |
641 | ||
d86e716a | 642 | static inline unsigned int disk_nr_zones(struct gendisk *disk) |
965b652e | 643 | { |
d86e716a | 644 | return blk_queue_is_zoned(disk->queue) ? disk->nr_zones : 0; |
965b652e DLM |
645 | } |
646 | ||
d86e716a | 647 | static inline unsigned int disk_zone_no(struct gendisk *disk, sector_t sector) |
6cc77e9c | 648 | { |
d86e716a | 649 | if (!blk_queue_is_zoned(disk->queue)) |
6cc77e9c | 650 | return 0; |
d86e716a | 651 | return sector >> ilog2(disk->queue->limits.chunk_sectors); |
6cc77e9c CH |
652 | } |
653 | ||
d86e716a | 654 | static inline bool disk_zone_is_seq(struct gendisk *disk, sector_t sector) |
6cc77e9c | 655 | { |
d86e716a | 656 | if (!blk_queue_is_zoned(disk->queue)) |
6cc77e9c | 657 | return false; |
d86e716a | 658 | if (!disk->conv_zones_bitmap) |
f216fdd7 | 659 | return true; |
d86e716a | 660 | return !test_bit(disk_zone_no(disk, sector), disk->conv_zones_bitmap); |
6cc77e9c | 661 | } |
e15864f8 | 662 | |
982977df | 663 | static inline void disk_set_max_open_zones(struct gendisk *disk, |
e15864f8 NC |
664 | unsigned int max_open_zones) |
665 | { | |
d86e716a | 666 | disk->max_open_zones = max_open_zones; |
e15864f8 NC |
667 | } |
668 | ||
982977df | 669 | static inline void disk_set_max_active_zones(struct gendisk *disk, |
659bf827 NC |
670 | unsigned int max_active_zones) |
671 | { | |
d86e716a | 672 | disk->max_active_zones = max_active_zones; |
659bf827 NC |
673 | } |
674 | ||
1dc01720 CH |
675 | static inline unsigned int bdev_max_open_zones(struct block_device *bdev) |
676 | { | |
d86e716a | 677 | return bdev->bd_disk->max_open_zones; |
1dc01720 CH |
678 | } |
679 | ||
680 | static inline unsigned int bdev_max_active_zones(struct block_device *bdev) | |
659bf827 | 681 | { |
d86e716a | 682 | return bdev->bd_disk->max_active_zones; |
659bf827 | 683 | } |
1dc01720 | 684 | |
965b652e | 685 | #else /* CONFIG_BLK_DEV_ZONED */ |
668bfeea CH |
686 | static inline unsigned int bdev_nr_zones(struct block_device *bdev) |
687 | { | |
688 | return 0; | |
689 | } | |
690 | ||
d86e716a | 691 | static inline unsigned int disk_nr_zones(struct gendisk *disk) |
965b652e DLM |
692 | { |
693 | return 0; | |
694 | } | |
d86e716a | 695 | static inline bool disk_zone_is_seq(struct gendisk *disk, sector_t sector) |
02992df8 JT |
696 | { |
697 | return false; | |
698 | } | |
d86e716a | 699 | static inline unsigned int disk_zone_no(struct gendisk *disk, sector_t sector) |
02992df8 JT |
700 | { |
701 | return 0; | |
702 | } | |
1dc01720 | 703 | static inline unsigned int bdev_max_open_zones(struct block_device *bdev) |
e15864f8 NC |
704 | { |
705 | return 0; | |
706 | } | |
d86e716a | 707 | |
1dc01720 | 708 | static inline unsigned int bdev_max_active_zones(struct block_device *bdev) |
659bf827 NC |
709 | { |
710 | return 0; | |
711 | } | |
6a5ac984 | 712 | #endif /* CONFIG_BLK_DEV_ZONED */ |
6cc77e9c | 713 | |
d278d4a8 JA |
714 | static inline unsigned int blk_queue_depth(struct request_queue *q) |
715 | { | |
716 | if (q->queue_depth) | |
717 | return q->queue_depth; | |
718 | ||
719 | return q->nr_requests; | |
720 | } | |
721 | ||
3d6392cf JA |
722 | /* |
723 | * default timeout for SG_IO if none specified | |
724 | */ | |
725 | #define BLK_DEFAULT_SG_TIMEOUT (60 * HZ) | |
f2f1fa78 | 726 | #define BLK_MIN_SG_TIMEOUT (7 * HZ) |
3d6392cf | 727 | |
5705f702 | 728 | /* This should not be used directly - use rq_for_each_segment */ |
1e428079 JA |
729 | #define for_each_bio(_bio) \ |
730 | for (; _bio; _bio = _bio->bi_next) | |
5705f702 | 731 | |
322cbb50 CH |
732 | int __must_check device_add_disk(struct device *parent, struct gendisk *disk, |
733 | const struct attribute_group **groups); | |
734 | static inline int __must_check add_disk(struct gendisk *disk) | |
735 | { | |
736 | return device_add_disk(NULL, disk, NULL); | |
737 | } | |
738 | void del_gendisk(struct gendisk *gp); | |
739 | void invalidate_disk(struct gendisk *disk); | |
740 | void set_disk_ro(struct gendisk *disk, bool read_only); | |
741 | void disk_uevent(struct gendisk *disk, enum kobject_action action); | |
742 | ||
743 | static inline int get_disk_ro(struct gendisk *disk) | |
744 | { | |
745 | return disk->part0->bd_read_only || | |
746 | test_bit(GD_READ_ONLY, &disk->state); | |
747 | } | |
748 | ||
749 | static inline int bdev_read_only(struct block_device *bdev) | |
750 | { | |
751 | return bdev->bd_read_only || get_disk_ro(bdev->bd_disk); | |
752 | } | |
753 | ||
754 | bool set_capacity_and_notify(struct gendisk *disk, sector_t size); | |
ab6860f6 | 755 | void disk_force_media_change(struct gendisk *disk); |
560e20e4 | 756 | void bdev_mark_dead(struct block_device *bdev, bool surprise); |
322cbb50 CH |
757 | |
758 | void add_disk_randomness(struct gendisk *disk) __latent_entropy; | |
759 | void rand_initialize_disk(struct gendisk *disk); | |
760 | ||
761 | static inline sector_t get_start_sect(struct block_device *bdev) | |
762 | { | |
763 | return bdev->bd_start_sect; | |
764 | } | |
765 | ||
766 | static inline sector_t bdev_nr_sectors(struct block_device *bdev) | |
767 | { | |
768 | return bdev->bd_nr_sectors; | |
769 | } | |
770 | ||
771 | static inline loff_t bdev_nr_bytes(struct block_device *bdev) | |
772 | { | |
773 | return (loff_t)bdev_nr_sectors(bdev) << SECTOR_SHIFT; | |
774 | } | |
775 | ||
776 | static inline sector_t get_capacity(struct gendisk *disk) | |
777 | { | |
778 | return bdev_nr_sectors(disk->part0); | |
779 | } | |
780 | ||
781 | static inline u64 sb_bdev_nr_blocks(struct super_block *sb) | |
782 | { | |
783 | return bdev_nr_sectors(sb->s_bdev) >> | |
784 | (sb->s_blocksize_bits - SECTOR_SHIFT); | |
785 | } | |
786 | ||
787 | int bdev_disk_changed(struct gendisk *disk, bool invalidate); | |
788 | ||
322cbb50 CH |
789 | void put_disk(struct gendisk *disk); |
790 | struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass); | |
791 | ||
792 | /** | |
793 | * blk_alloc_disk - allocate a gendisk structure | |
794 | * @node_id: numa node to allocate on | |
795 | * | |
796 | * Allocate and pre-initialize a gendisk structure for use with BIO based | |
797 | * drivers. | |
798 | * | |
799 | * Context: can sleep | |
800 | */ | |
801 | #define blk_alloc_disk(node_id) \ | |
802 | ({ \ | |
803 | static struct lock_class_key __key; \ | |
804 | \ | |
805 | __blk_alloc_disk(node_id, &__key); \ | |
806 | }) | |
322cbb50 CH |
807 | |
808 | int __register_blkdev(unsigned int major, const char *name, | |
809 | void (*probe)(dev_t devt)); | |
810 | #define register_blkdev(major, name) \ | |
811 | __register_blkdev(major, name, NULL) | |
812 | void unregister_blkdev(unsigned int major, const char *name); | |
813 | ||
444aa2c5 | 814 | bool disk_check_media_change(struct gendisk *disk); |
322cbb50 CH |
815 | void set_capacity(struct gendisk *disk, sector_t size); |
816 | ||
817 | #ifdef CONFIG_BLOCK_HOLDER_DEPRECATED | |
818 | int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); | |
819 | void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk); | |
322cbb50 CH |
820 | #else |
821 | static inline int bd_link_disk_holder(struct block_device *bdev, | |
822 | struct gendisk *disk) | |
823 | { | |
824 | return 0; | |
825 | } | |
826 | static inline void bd_unlink_disk_holder(struct block_device *bdev, | |
827 | struct gendisk *disk) | |
828 | { | |
829 | } | |
322cbb50 CH |
830 | #endif /* CONFIG_BLOCK_HOLDER_DEPRECATED */ |
831 | ||
832 | dev_t part_devt(struct gendisk *disk, u8 partno); | |
833 | void inc_diskseq(struct gendisk *disk); | |
322cbb50 | 834 | void blk_request_module(dev_t devt); |
2d4dc890 | 835 | |
1da177e4 LT |
836 | extern int blk_register_queue(struct gendisk *disk); |
837 | extern void blk_unregister_queue(struct gendisk *disk); | |
3e08773c | 838 | void submit_bio_noacct(struct bio *bio); |
5a97806f | 839 | struct bio *bio_split_to_limits(struct bio *bio); |
24b83deb | 840 | |
ef9e3fac | 841 | extern int blk_lld_busy(struct request_queue *q); |
9a95e4ef | 842 | extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags); |
2e6edc95 | 843 | extern void blk_queue_exit(struct request_queue *q); |
1da177e4 | 844 | extern void blk_sync_queue(struct request_queue *q); |
fb9b16e1 | 845 | |
e47bc4ed | 846 | /* Helper to convert REQ_OP_XXX to its string format XXX */ |
77e7ffd7 | 847 | extern const char *blk_op_str(enum req_op op); |
e47bc4ed | 848 | |
2a842aca CH |
849 | int blk_status_to_errno(blk_status_t status); |
850 | blk_status_t errno_to_blk_status(int errno); | |
7ba37927 | 851 | const char *blk_status_to_str(blk_status_t status); |
2a842aca | 852 | |
ef99b2d3 CH |
853 | /* only poll the hardware once, don't continue until a completion was found */ |
854 | #define BLK_POLL_ONESHOT (1 << 0) | |
5a72e899 JA |
855 | int bio_poll(struct bio *bio, struct io_comp_batch *iob, unsigned int flags); |
856 | int iocb_bio_iopoll(struct kiocb *kiocb, struct io_comp_batch *iob, | |
857 | unsigned int flags); | |
05229bee | 858 | |
165125e1 | 859 | static inline struct request_queue *bdev_get_queue(struct block_device *bdev) |
1da177e4 | 860 | { |
17220ca5 | 861 | return bdev->bd_queue; /* this is never NULL */ |
1da177e4 LT |
862 | } |
863 | ||
02694e86 CK |
864 | /* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */ |
865 | const char *blk_zone_cond_str(enum blk_zone_cond zone_cond); | |
866 | ||
d0ea6bde DLM |
867 | static inline unsigned int bio_zone_no(struct bio *bio) |
868 | { | |
d86e716a | 869 | return disk_zone_no(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector); |
d0ea6bde DLM |
870 | } |
871 | ||
872 | static inline unsigned int bio_zone_is_seq(struct bio *bio) | |
873 | { | |
d86e716a | 874 | return disk_zone_is_seq(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector); |
d0ea6bde | 875 | } |
6cc77e9c | 876 | |
8689461b CH |
877 | /* |
878 | * Return how much of the chunk is left to be used for I/O at a given offset. | |
879 | */ | |
880 | static inline unsigned int blk_chunk_sectors_left(sector_t offset, | |
881 | unsigned int chunk_sectors) | |
882 | { | |
883 | if (unlikely(!is_power_of_2(chunk_sectors))) | |
884 | return chunk_sectors - sector_div(offset, chunk_sectors); | |
885 | return chunk_sectors - (offset & (chunk_sectors - 1)); | |
886 | } | |
887 | ||
1da177e4 LT |
888 | /* |
889 | * Access functions for manipulating queue properties | |
890 | */ | |
9bb33f24 | 891 | void blk_queue_bounce_limit(struct request_queue *q, enum blk_bounce limit); |
086fa5ff | 892 | extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int); |
762380ad | 893 | extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int); |
8a78362c | 894 | extern void blk_queue_max_segments(struct request_queue *, unsigned short); |
1e739730 CH |
895 | extern void blk_queue_max_discard_segments(struct request_queue *, |
896 | unsigned short); | |
44abff2c CH |
897 | void blk_queue_max_secure_erase_sectors(struct request_queue *q, |
898 | unsigned int max_sectors); | |
165125e1 | 899 | extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); |
67efc925 CH |
900 | extern void blk_queue_max_discard_sectors(struct request_queue *q, |
901 | unsigned int max_discard_sectors); | |
a6f0788e CK |
902 | extern void blk_queue_max_write_zeroes_sectors(struct request_queue *q, |
903 | unsigned int max_write_same_sectors); | |
ad6bf88a | 904 | extern void blk_queue_logical_block_size(struct request_queue *, unsigned int); |
0512a75b KB |
905 | extern void blk_queue_max_zone_append_sectors(struct request_queue *q, |
906 | unsigned int max_zone_append_sectors); | |
892b6f90 | 907 | extern void blk_queue_physical_block_size(struct request_queue *, unsigned int); |
a805a4fa DLM |
908 | void blk_queue_zone_write_granularity(struct request_queue *q, |
909 | unsigned int size); | |
c72758f3 MP |
910 | extern void blk_queue_alignment_offset(struct request_queue *q, |
911 | unsigned int alignment); | |
471aa704 | 912 | void disk_update_readahead(struct gendisk *disk); |
7c958e32 | 913 | extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min); |
c72758f3 | 914 | extern void blk_queue_io_min(struct request_queue *q, unsigned int min); |
3c5820c7 | 915 | extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt); |
c72758f3 | 916 | extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt); |
d278d4a8 | 917 | extern void blk_set_queue_depth(struct request_queue *q, unsigned int depth); |
b1bd055d | 918 | extern void blk_set_stacking_limits(struct queue_limits *lim); |
c72758f3 MP |
919 | extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, |
920 | sector_t offset); | |
921 | extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, | |
922 | sector_t offset); | |
27f8221a | 923 | extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int); |
165125e1 | 924 | extern void blk_queue_segment_boundary(struct request_queue *, unsigned long); |
03100aad | 925 | extern void blk_queue_virt_boundary(struct request_queue *, unsigned long); |
165125e1 | 926 | extern void blk_queue_dma_alignment(struct request_queue *, int); |
11c3e689 | 927 | extern void blk_queue_update_dma_alignment(struct request_queue *, int); |
242f9dcb | 928 | extern void blk_queue_rq_timeout(struct request_queue *, unsigned int); |
93e9d8e8 | 929 | extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua); |
2e9bc346 | 930 | |
a2247f19 DLM |
931 | struct blk_independent_access_ranges * |
932 | disk_alloc_independent_access_ranges(struct gendisk *disk, int nr_ia_ranges); | |
933 | void disk_set_independent_access_ranges(struct gendisk *disk, | |
934 | struct blk_independent_access_ranges *iars); | |
935 | ||
2e9bc346 CH |
936 | /* |
937 | * Elevator features for blk_queue_required_elevator_features: | |
938 | */ | |
939 | /* Supports zoned block devices sequential write constraint */ | |
940 | #define ELEVATOR_F_ZBD_SEQ_WRITE (1U << 0) | |
2e9bc346 | 941 | |
68c43f13 DLM |
942 | extern void blk_queue_required_elevator_features(struct request_queue *q, |
943 | unsigned int features); | |
45147fb5 YS |
944 | extern bool blk_queue_can_use_dma_map_merging(struct request_queue *q, |
945 | struct device *dev); | |
1da177e4 | 946 | |
09ac46c4 | 947 | bool __must_check blk_get_queue(struct request_queue *); |
165125e1 | 948 | extern void blk_put_queue(struct request_queue *); |
7a5428dc CH |
949 | |
950 | void blk_mark_disk_dead(struct gendisk *disk); | |
1da177e4 | 951 | |
1a4dcfa8 | 952 | #ifdef CONFIG_BLOCK |
316cc67d | 953 | /* |
75df7136 SJ |
954 | * blk_plug permits building a queue of related requests by holding the I/O |
955 | * fragments for a short period. This allows merging of sequential requests | |
956 | * into single larger request. As the requests are moved from a per-task list to | |
957 | * the device's request_queue in a batch, this results in improved scalability | |
958 | * as the lock contention for request_queue lock is reduced. | |
959 | * | |
960 | * It is ok not to disable preemption when adding the request to the plug list | |
008f75a2 CH |
961 | * or when attempting a merge. For details, please see schedule() where |
962 | * blk_flush_plug() is called. | |
316cc67d | 963 | */ |
73c10101 | 964 | struct blk_plug { |
bc490f81 | 965 | struct request *mq_list; /* blk-mq requests */ |
47c122e3 JA |
966 | |
967 | /* if ios_left is > 1, we can batch tag/rq allocations */ | |
968 | struct request *cached_rq; | |
969 | unsigned short nr_ios; | |
970 | ||
5f0ed774 | 971 | unsigned short rq_count; |
47c122e3 | 972 | |
ce5b009c | 973 | bool multiple_queues; |
dc5fc361 | 974 | bool has_elevator; |
47c122e3 JA |
975 | |
976 | struct list_head cb_list; /* md requires an unplug callback */ | |
73c10101 | 977 | }; |
55c022bb | 978 | |
9cbb1750 | 979 | struct blk_plug_cb; |
74018dc3 | 980 | typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool); |
048c9374 N |
981 | struct blk_plug_cb { |
982 | struct list_head list; | |
9cbb1750 N |
983 | blk_plug_cb_fn callback; |
984 | void *data; | |
048c9374 | 985 | }; |
9cbb1750 N |
986 | extern struct blk_plug_cb *blk_check_plugged(blk_plug_cb_fn unplug, |
987 | void *data, int size); | |
73c10101 | 988 | extern void blk_start_plug(struct blk_plug *); |
47c122e3 | 989 | extern void blk_start_plug_nr_ios(struct blk_plug *, unsigned short); |
73c10101 | 990 | extern void blk_finish_plug(struct blk_plug *); |
73c10101 | 991 | |
aa8dccca CH |
992 | void __blk_flush_plug(struct blk_plug *plug, bool from_schedule); |
993 | static inline void blk_flush_plug(struct blk_plug *plug, bool async) | |
73c10101 | 994 | { |
aa8dccca CH |
995 | if (plug) |
996 | __blk_flush_plug(plug, async); | |
73c10101 JA |
997 | } |
998 | ||
c6bf3f0e | 999 | int blkdev_issue_flush(struct block_device *bdev); |
1a4dcfa8 CH |
1000 | long nr_blockdev_pages(void); |
1001 | #else /* CONFIG_BLOCK */ | |
1002 | struct blk_plug { | |
1003 | }; | |
1004 | ||
47c122e3 JA |
1005 | static inline void blk_start_plug_nr_ios(struct blk_plug *plug, |
1006 | unsigned short nr_ios) | |
1007 | { | |
1008 | } | |
1009 | ||
1a4dcfa8 CH |
1010 | static inline void blk_start_plug(struct blk_plug *plug) |
1011 | { | |
1012 | } | |
1013 | ||
1014 | static inline void blk_finish_plug(struct blk_plug *plug) | |
1015 | { | |
1016 | } | |
1017 | ||
008f75a2 | 1018 | static inline void blk_flush_plug(struct blk_plug *plug, bool async) |
1a4dcfa8 CH |
1019 | { |
1020 | } | |
1021 | ||
c6bf3f0e | 1022 | static inline int blkdev_issue_flush(struct block_device *bdev) |
1a4dcfa8 CH |
1023 | { |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | static inline long nr_blockdev_pages(void) | |
1028 | { | |
1029 | return 0; | |
1030 | } | |
1031 | #endif /* CONFIG_BLOCK */ | |
1032 | ||
71ac860a ML |
1033 | extern void blk_io_schedule(void); |
1034 | ||
44abff2c CH |
1035 | int blkdev_issue_discard(struct block_device *bdev, sector_t sector, |
1036 | sector_t nr_sects, gfp_t gfp_mask); | |
1037 | int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, | |
1038 | sector_t nr_sects, gfp_t gfp_mask, struct bio **biop); | |
1039 | int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector, | |
1040 | sector_t nr_sects, gfp_t gfp); | |
ee472d83 CH |
1041 | |
1042 | #define BLKDEV_ZERO_NOUNMAP (1 << 0) /* do not free blocks */ | |
cb365b96 | 1043 | #define BLKDEV_ZERO_NOFALLBACK (1 << 1) /* don't write explicit zeroes */ |
ee472d83 | 1044 | |
e73c23ff CK |
1045 | extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, |
1046 | sector_t nr_sects, gfp_t gfp_mask, struct bio **biop, | |
ee472d83 | 1047 | unsigned flags); |
3f14d792 | 1048 | extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, |
ee472d83 CH |
1049 | sector_t nr_sects, gfp_t gfp_mask, unsigned flags); |
1050 | ||
2cf6d26a CH |
1051 | static inline int sb_issue_discard(struct super_block *sb, sector_t block, |
1052 | sector_t nr_blocks, gfp_t gfp_mask, unsigned long flags) | |
fb2dce86 | 1053 | { |
233bde21 BVA |
1054 | return blkdev_issue_discard(sb->s_bdev, |
1055 | block << (sb->s_blocksize_bits - | |
1056 | SECTOR_SHIFT), | |
1057 | nr_blocks << (sb->s_blocksize_bits - | |
1058 | SECTOR_SHIFT), | |
44abff2c | 1059 | gfp_mask); |
fb2dce86 | 1060 | } |
e6fa0be6 | 1061 | static inline int sb_issue_zeroout(struct super_block *sb, sector_t block, |
a107e5a3 | 1062 | sector_t nr_blocks, gfp_t gfp_mask) |
e6fa0be6 LC |
1063 | { |
1064 | return blkdev_issue_zeroout(sb->s_bdev, | |
233bde21 BVA |
1065 | block << (sb->s_blocksize_bits - |
1066 | SECTOR_SHIFT), | |
1067 | nr_blocks << (sb->s_blocksize_bits - | |
1068 | SECTOR_SHIFT), | |
ee472d83 | 1069 | gfp_mask, 0); |
e6fa0be6 | 1070 | } |
1da177e4 | 1071 | |
fa01b1e9 CH |
1072 | static inline bool bdev_is_partition(struct block_device *bdev) |
1073 | { | |
1074 | return bdev->bd_partno; | |
1075 | } | |
1076 | ||
eb28d31b MP |
1077 | enum blk_default_limits { |
1078 | BLK_MAX_SEGMENTS = 128, | |
1079 | BLK_SAFE_MAX_SECTORS = 255, | |
eb28d31b MP |
1080 | BLK_MAX_SEGMENT_SIZE = 65536, |
1081 | BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL, | |
1082 | }; | |
0e435ac2 | 1083 | |
0a26f327 KB |
1084 | #define BLK_DEF_MAX_SECTORS 2560u |
1085 | ||
af2c68fe | 1086 | static inline unsigned long queue_segment_boundary(const struct request_queue *q) |
ae03bf63 | 1087 | { |
025146e1 | 1088 | return q->limits.seg_boundary_mask; |
ae03bf63 MP |
1089 | } |
1090 | ||
af2c68fe | 1091 | static inline unsigned long queue_virt_boundary(const struct request_queue *q) |
03100aad KB |
1092 | { |
1093 | return q->limits.virt_boundary_mask; | |
1094 | } | |
1095 | ||
af2c68fe | 1096 | static inline unsigned int queue_max_sectors(const struct request_queue *q) |
ae03bf63 | 1097 | { |
025146e1 | 1098 | return q->limits.max_sectors; |
ae03bf63 MP |
1099 | } |
1100 | ||
547e2f70 CH |
1101 | static inline unsigned int queue_max_bytes(struct request_queue *q) |
1102 | { | |
1103 | return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9; | |
1104 | } | |
1105 | ||
af2c68fe | 1106 | static inline unsigned int queue_max_hw_sectors(const struct request_queue *q) |
ae03bf63 | 1107 | { |
025146e1 | 1108 | return q->limits.max_hw_sectors; |
ae03bf63 MP |
1109 | } |
1110 | ||
af2c68fe | 1111 | static inline unsigned short queue_max_segments(const struct request_queue *q) |
ae03bf63 | 1112 | { |
8a78362c | 1113 | return q->limits.max_segments; |
ae03bf63 MP |
1114 | } |
1115 | ||
af2c68fe | 1116 | static inline unsigned short queue_max_discard_segments(const struct request_queue *q) |
1e739730 CH |
1117 | { |
1118 | return q->limits.max_discard_segments; | |
1119 | } | |
1120 | ||
af2c68fe | 1121 | static inline unsigned int queue_max_segment_size(const struct request_queue *q) |
ae03bf63 | 1122 | { |
025146e1 | 1123 | return q->limits.max_segment_size; |
ae03bf63 MP |
1124 | } |
1125 | ||
0512a75b KB |
1126 | static inline unsigned int queue_max_zone_append_sectors(const struct request_queue *q) |
1127 | { | |
fe6f0cdc JT |
1128 | |
1129 | const struct queue_limits *l = &q->limits; | |
1130 | ||
1131 | return min(l->max_zone_append_sectors, l->max_sectors); | |
0512a75b KB |
1132 | } |
1133 | ||
2aba0d19 CH |
1134 | static inline unsigned int |
1135 | bdev_max_zone_append_sectors(struct block_device *bdev) | |
1136 | { | |
1137 | return queue_max_zone_append_sectors(bdev_get_queue(bdev)); | |
1138 | } | |
1139 | ||
65ea1b66 NA |
1140 | static inline unsigned int bdev_max_segments(struct block_device *bdev) |
1141 | { | |
1142 | return queue_max_segments(bdev_get_queue(bdev)); | |
1143 | } | |
1144 | ||
ad6bf88a | 1145 | static inline unsigned queue_logical_block_size(const struct request_queue *q) |
1da177e4 LT |
1146 | { |
1147 | int retval = 512; | |
1148 | ||
025146e1 MP |
1149 | if (q && q->limits.logical_block_size) |
1150 | retval = q->limits.logical_block_size; | |
1da177e4 LT |
1151 | |
1152 | return retval; | |
1153 | } | |
1154 | ||
ad6bf88a | 1155 | static inline unsigned int bdev_logical_block_size(struct block_device *bdev) |
1da177e4 | 1156 | { |
e1defc4f | 1157 | return queue_logical_block_size(bdev_get_queue(bdev)); |
1da177e4 LT |
1158 | } |
1159 | ||
af2c68fe | 1160 | static inline unsigned int queue_physical_block_size(const struct request_queue *q) |
c72758f3 MP |
1161 | { |
1162 | return q->limits.physical_block_size; | |
1163 | } | |
1164 | ||
892b6f90 | 1165 | static inline unsigned int bdev_physical_block_size(struct block_device *bdev) |
ac481c20 MP |
1166 | { |
1167 | return queue_physical_block_size(bdev_get_queue(bdev)); | |
1168 | } | |
1169 | ||
af2c68fe | 1170 | static inline unsigned int queue_io_min(const struct request_queue *q) |
c72758f3 MP |
1171 | { |
1172 | return q->limits.io_min; | |
1173 | } | |
1174 | ||
ac481c20 MP |
1175 | static inline int bdev_io_min(struct block_device *bdev) |
1176 | { | |
1177 | return queue_io_min(bdev_get_queue(bdev)); | |
1178 | } | |
1179 | ||
af2c68fe | 1180 | static inline unsigned int queue_io_opt(const struct request_queue *q) |
c72758f3 MP |
1181 | { |
1182 | return q->limits.io_opt; | |
1183 | } | |
1184 | ||
ac481c20 MP |
1185 | static inline int bdev_io_opt(struct block_device *bdev) |
1186 | { | |
1187 | return queue_io_opt(bdev_get_queue(bdev)); | |
1188 | } | |
1189 | ||
a805a4fa DLM |
1190 | static inline unsigned int |
1191 | queue_zone_write_granularity(const struct request_queue *q) | |
1192 | { | |
1193 | return q->limits.zone_write_granularity; | |
1194 | } | |
1195 | ||
1196 | static inline unsigned int | |
1197 | bdev_zone_write_granularity(struct block_device *bdev) | |
1198 | { | |
1199 | return queue_zone_write_granularity(bdev_get_queue(bdev)); | |
1200 | } | |
1201 | ||
89098b07 | 1202 | int bdev_alignment_offset(struct block_device *bdev); |
5c4b4a5c | 1203 | unsigned int bdev_discard_alignment(struct block_device *bdev); |
c6e66634 | 1204 | |
cf0fbf89 CH |
1205 | static inline unsigned int bdev_max_discard_sectors(struct block_device *bdev) |
1206 | { | |
1207 | return bdev_get_queue(bdev)->limits.max_discard_sectors; | |
1208 | } | |
1209 | ||
7b47ef52 CH |
1210 | static inline unsigned int bdev_discard_granularity(struct block_device *bdev) |
1211 | { | |
1212 | return bdev_get_queue(bdev)->limits.discard_granularity; | |
1213 | } | |
1214 | ||
44abff2c CH |
1215 | static inline unsigned int |
1216 | bdev_max_secure_erase_sectors(struct block_device *bdev) | |
1217 | { | |
1218 | return bdev_get_queue(bdev)->limits.max_secure_erase_sectors; | |
1219 | } | |
1220 | ||
a6f0788e CK |
1221 | static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev) |
1222 | { | |
1223 | struct request_queue *q = bdev_get_queue(bdev); | |
1224 | ||
1225 | if (q) | |
1226 | return q->limits.max_write_zeroes_sectors; | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
10f0d2a5 CH |
1231 | static inline bool bdev_nonrot(struct block_device *bdev) |
1232 | { | |
1233 | return blk_queue_nonrot(bdev_get_queue(bdev)); | |
1234 | } | |
1235 | ||
3222d8c2 CH |
1236 | static inline bool bdev_synchronous(struct block_device *bdev) |
1237 | { | |
1238 | return test_bit(QUEUE_FLAG_SYNCHRONOUS, | |
1239 | &bdev_get_queue(bdev)->queue_flags); | |
1240 | } | |
1241 | ||
36d25489 CH |
1242 | static inline bool bdev_stable_writes(struct block_device *bdev) |
1243 | { | |
1244 | return test_bit(QUEUE_FLAG_STABLE_WRITES, | |
1245 | &bdev_get_queue(bdev)->queue_flags); | |
1246 | } | |
1247 | ||
08e688fd CH |
1248 | static inline bool bdev_write_cache(struct block_device *bdev) |
1249 | { | |
1250 | return test_bit(QUEUE_FLAG_WC, &bdev_get_queue(bdev)->queue_flags); | |
1251 | } | |
1252 | ||
a557e82e CH |
1253 | static inline bool bdev_fua(struct block_device *bdev) |
1254 | { | |
1255 | return test_bit(QUEUE_FLAG_FUA, &bdev_get_queue(bdev)->queue_flags); | |
1256 | } | |
1257 | ||
568ec936 CH |
1258 | static inline bool bdev_nowait(struct block_device *bdev) |
1259 | { | |
1260 | return test_bit(QUEUE_FLAG_NOWAIT, &bdev_get_queue(bdev)->queue_flags); | |
1261 | } | |
1262 | ||
797476b8 DLM |
1263 | static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev) |
1264 | { | |
9e0c7efa | 1265 | return blk_queue_zoned_model(bdev_get_queue(bdev)); |
797476b8 DLM |
1266 | } |
1267 | ||
1268 | static inline bool bdev_is_zoned(struct block_device *bdev) | |
1269 | { | |
fea127b3 | 1270 | return blk_queue_is_zoned(bdev_get_queue(bdev)); |
797476b8 DLM |
1271 | } |
1272 | ||
d67ea690 PR |
1273 | static inline unsigned int bdev_zone_no(struct block_device *bdev, sector_t sec) |
1274 | { | |
1275 | return disk_zone_no(bdev->bd_disk, sec); | |
1276 | } | |
1277 | ||
a3707982 BVA |
1278 | /* Whether write serialization is required for @op on zoned devices. */ |
1279 | static inline bool op_needs_zoned_write_locking(enum req_op op) | |
8cafdb5a | 1280 | { |
8cafdb5a PR |
1281 | return op == REQ_OP_WRITE || op == REQ_OP_WRITE_ZEROES; |
1282 | } | |
1283 | ||
8cafdb5a | 1284 | static inline bool bdev_op_is_zoned_write(struct block_device *bdev, |
3ddbe2a7 | 1285 | enum req_op op) |
8cafdb5a | 1286 | { |
a3707982 | 1287 | return bdev_is_zoned(bdev) && op_needs_zoned_write_locking(op); |
8cafdb5a PR |
1288 | } |
1289 | ||
113ab72e | 1290 | static inline sector_t bdev_zone_sectors(struct block_device *bdev) |
6a0cb1bc HR |
1291 | { |
1292 | struct request_queue *q = bdev_get_queue(bdev); | |
1293 | ||
de71973c CH |
1294 | if (!blk_queue_is_zoned(q)) |
1295 | return 0; | |
1296 | return q->limits.chunk_sectors; | |
6cc77e9c | 1297 | } |
6a0cb1bc | 1298 | |
e29b2100 PR |
1299 | static inline sector_t bdev_offset_from_zone_start(struct block_device *bdev, |
1300 | sector_t sector) | |
1301 | { | |
1302 | return sector & (bdev_zone_sectors(bdev) - 1); | |
1303 | } | |
1304 | ||
1305 | static inline bool bdev_is_zone_start(struct block_device *bdev, | |
1306 | sector_t sector) | |
1307 | { | |
1308 | return bdev_offset_from_zone_start(bdev, sector) == 0; | |
1309 | } | |
1310 | ||
af2c68fe | 1311 | static inline int queue_dma_alignment(const struct request_queue *q) |
1da177e4 | 1312 | { |
c964d62f | 1313 | return q ? q->limits.dma_alignment : 511; |
1da177e4 LT |
1314 | } |
1315 | ||
4a2dcc35 KB |
1316 | static inline unsigned int bdev_dma_alignment(struct block_device *bdev) |
1317 | { | |
1318 | return queue_dma_alignment(bdev_get_queue(bdev)); | |
1319 | } | |
1320 | ||
5debd969 KB |
1321 | static inline bool bdev_iter_is_aligned(struct block_device *bdev, |
1322 | struct iov_iter *iter) | |
1323 | { | |
1324 | return iov_iter_is_aligned(iter, bdev_dma_alignment(bdev), | |
1325 | bdev_logical_block_size(bdev) - 1); | |
1326 | } | |
1327 | ||
14417799 | 1328 | static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr, |
87904074 FT |
1329 | unsigned int len) |
1330 | { | |
1331 | unsigned int alignment = queue_dma_alignment(q) | q->dma_pad_mask; | |
14417799 | 1332 | return !(addr & alignment) && !(len & alignment); |
87904074 FT |
1333 | } |
1334 | ||
1da177e4 LT |
1335 | /* assumes size > 256 */ |
1336 | static inline unsigned int blksize_bits(unsigned int size) | |
1337 | { | |
adff2158 | 1338 | return order_base_2(size >> SECTOR_SHIFT) + SECTOR_SHIFT; |
1da177e4 LT |
1339 | } |
1340 | ||
2befb9e3 | 1341 | static inline unsigned int block_size(struct block_device *bdev) |
1da177e4 | 1342 | { |
6b7b181b | 1343 | return 1 << bdev->bd_inode->i_blkbits; |
1da177e4 LT |
1344 | } |
1345 | ||
59c3d45e | 1346 | int kblockd_schedule_work(struct work_struct *work); |
818cd1cb | 1347 | int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay); |
1da177e4 | 1348 | |
1da177e4 LT |
1349 | #define MODULE_ALIAS_BLOCKDEV(major,minor) \ |
1350 | MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor)) | |
1351 | #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \ | |
1352 | MODULE_ALIAS("block-major-" __stringify(major) "-*") | |
1353 | ||
d145dc23 ST |
1354 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
1355 | ||
cb77cb5a EB |
1356 | bool blk_crypto_register(struct blk_crypto_profile *profile, |
1357 | struct request_queue *q); | |
d145dc23 | 1358 | |
d145dc23 ST |
1359 | #else /* CONFIG_BLK_INLINE_ENCRYPTION */ |
1360 | ||
cb77cb5a EB |
1361 | static inline bool blk_crypto_register(struct blk_crypto_profile *profile, |
1362 | struct request_queue *q) | |
d145dc23 ST |
1363 | { |
1364 | return true; | |
1365 | } | |
1366 | ||
d145dc23 ST |
1367 | #endif /* CONFIG_BLK_INLINE_ENCRYPTION */ |
1368 | ||
9208d414 CH |
1369 | enum blk_unique_id { |
1370 | /* these match the Designator Types specified in SPC */ | |
1371 | BLK_UID_T10 = 1, | |
1372 | BLK_UID_EUI64 = 2, | |
1373 | BLK_UID_NAA = 3, | |
1374 | }; | |
1375 | ||
08f85851 | 1376 | struct block_device_operations { |
3e08773c | 1377 | void (*submit_bio)(struct bio *bio); |
69fe0f29 ML |
1378 | int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob, |
1379 | unsigned int flags); | |
05bdb996 | 1380 | int (*open)(struct gendisk *disk, blk_mode_t mode); |
ae220766 | 1381 | void (*release)(struct gendisk *disk); |
05bdb996 CH |
1382 | int (*ioctl)(struct block_device *bdev, blk_mode_t mode, |
1383 | unsigned cmd, unsigned long arg); | |
1384 | int (*compat_ioctl)(struct block_device *bdev, blk_mode_t mode, | |
1385 | unsigned cmd, unsigned long arg); | |
77ea887e TH |
1386 | unsigned int (*check_events) (struct gendisk *disk, |
1387 | unsigned int clearing); | |
c3e33e04 | 1388 | void (*unlock_native_capacity) (struct gendisk *); |
08f85851 | 1389 | int (*getgeo)(struct block_device *, struct hd_geometry *); |
e00adcad | 1390 | int (*set_read_only)(struct block_device *bdev, bool ro); |
76792055 | 1391 | void (*free_disk)(struct gendisk *disk); |
b3a27d05 NG |
1392 | /* this callback is with swap_lock and sometimes page table lock held */ |
1393 | void (*swap_slot_free_notify) (struct block_device *, unsigned long); | |
e76239a3 | 1394 | int (*report_zones)(struct gendisk *, sector_t sector, |
d4100351 | 1395 | unsigned int nr_zones, report_zones_cb cb, void *data); |
050a4f34 | 1396 | char *(*devnode)(struct gendisk *disk, umode_t *mode); |
9208d414 CH |
1397 | /* returns the length of the identifier or a negative errno: */ |
1398 | int (*get_unique_id)(struct gendisk *disk, u8 id[16], | |
1399 | enum blk_unique_id id_type); | |
08f85851 | 1400 | struct module *owner; |
bbd3e064 | 1401 | const struct pr_ops *pr_ops; |
0bdfbca8 DO |
1402 | |
1403 | /* | |
1404 | * Special callback for probing GPT entry at a given sector. | |
1405 | * Needed by Android devices, used by GPT scanner and MMC blk | |
1406 | * driver. | |
1407 | */ | |
1408 | int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector); | |
08f85851 AV |
1409 | }; |
1410 | ||
ee6a129d | 1411 | #ifdef CONFIG_COMPAT |
05bdb996 | 1412 | extern int blkdev_compat_ptr_ioctl(struct block_device *, blk_mode_t, |
ee6a129d AB |
1413 | unsigned int, unsigned long); |
1414 | #else | |
1415 | #define blkdev_compat_ptr_ioctl NULL | |
1416 | #endif | |
1417 | ||
0619317f JA |
1418 | static inline void blk_wake_io_task(struct task_struct *waiter) |
1419 | { | |
1420 | /* | |
1421 | * If we're polling, the task itself is doing the completions. For | |
1422 | * that case, we don't need to signal a wakeup, it's enough to just | |
1423 | * mark us as RUNNING. | |
1424 | */ | |
1425 | if (waiter == current) | |
1426 | __set_current_state(TASK_RUNNING); | |
1427 | else | |
1428 | wake_up_process(waiter); | |
1429 | } | |
1430 | ||
5f275713 | 1431 | unsigned long bdev_start_io_acct(struct block_device *bdev, enum req_op op, |
5f0614a5 | 1432 | unsigned long start_time); |
77e7ffd7 | 1433 | void bdev_end_io_acct(struct block_device *bdev, enum req_op op, |
5f275713 | 1434 | unsigned int sectors, unsigned long start_time); |
956d510e | 1435 | |
99dfc43e CH |
1436 | unsigned long bio_start_io_acct(struct bio *bio); |
1437 | void bio_end_io_acct_remapped(struct bio *bio, unsigned long start_time, | |
1438 | struct block_device *orig_bdev); | |
956d510e CH |
1439 | |
1440 | /** | |
1441 | * bio_end_io_acct - end I/O accounting for bio based drivers | |
1442 | * @bio: bio to end account for | |
b42c1fc3 | 1443 | * @start_time: start time returned by bio_start_io_acct() |
956d510e CH |
1444 | */ |
1445 | static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time) | |
1446 | { | |
99dfc43e | 1447 | return bio_end_io_acct_remapped(bio, start_time, bio->bi_bdev); |
956d510e | 1448 | } |
956d510e | 1449 | |
3f1266f1 CH |
1450 | int bdev_read_only(struct block_device *bdev); |
1451 | int set_blocksize(struct block_device *bdev, int size); | |
1452 | ||
4e7b5671 | 1453 | int lookup_bdev(const char *pathname, dev_t *dev); |
3f1266f1 CH |
1454 | |
1455 | void blkdev_show(struct seq_file *seqf, off_t offset); | |
1456 | ||
1457 | #define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */ | |
1458 | #define BDEVT_SIZE 10 /* Largest string for MAJ:MIN for blkdev */ | |
1459 | #ifdef CONFIG_BLOCK | |
1460 | #define BLKDEV_MAJOR_MAX 512 | |
1461 | #else | |
1462 | #define BLKDEV_MAJOR_MAX 0 | |
1463 | #endif | |
1464 | ||
0718afd4 | 1465 | struct blk_holder_ops { |
d8530de5 | 1466 | void (*mark_dead)(struct block_device *bdev, bool surprise); |
2142b88c CH |
1467 | |
1468 | /* | |
1469 | * Sync the file system mounted on the block device. | |
1470 | */ | |
1471 | void (*sync)(struct block_device *bdev); | |
0718afd4 CH |
1472 | }; |
1473 | ||
7ecd0b6f CH |
1474 | extern const struct blk_holder_ops fs_holder_ops; |
1475 | ||
3f0b3e78 CH |
1476 | /* |
1477 | * Return the correct open flags for blkdev_get_by_* for super block flags | |
1478 | * as stored in sb->s_flags. | |
1479 | */ | |
1480 | #define sb_open_mode(flags) \ | |
05bdb996 | 1481 | (BLK_OPEN_READ | (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE)) |
3f0b3e78 | 1482 | |
e719b4d1 JK |
1483 | struct bdev_handle { |
1484 | struct block_device *bdev; | |
1485 | void *holder; | |
841dd789 | 1486 | blk_mode_t mode; |
e719b4d1 JK |
1487 | }; |
1488 | ||
05bdb996 | 1489 | struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder, |
0718afd4 | 1490 | const struct blk_holder_ops *hops); |
05bdb996 | 1491 | struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode, |
0718afd4 | 1492 | void *holder, const struct blk_holder_ops *hops); |
e719b4d1 JK |
1493 | struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder, |
1494 | const struct blk_holder_ops *hops); | |
1495 | struct bdev_handle *bdev_open_by_path(const char *path, blk_mode_t mode, | |
1496 | void *holder, const struct blk_holder_ops *hops); | |
0718afd4 CH |
1497 | int bd_prepare_to_claim(struct block_device *bdev, void *holder, |
1498 | const struct blk_holder_ops *hops); | |
37c3fc9a | 1499 | void bd_abort_claiming(struct block_device *bdev, void *holder); |
2736e8ee | 1500 | void blkdev_put(struct block_device *bdev, void *holder); |
e719b4d1 | 1501 | void bdev_release(struct bdev_handle *handle); |
3f1266f1 | 1502 | |
22ae8ce8 CH |
1503 | /* just for blk-cgroup, don't use elsewhere */ |
1504 | struct block_device *blkdev_get_no_open(dev_t dev); | |
1505 | void blkdev_put_no_open(struct block_device *bdev); | |
1506 | ||
621c1f42 | 1507 | struct block_device *I_BDEV(struct inode *inode); |
3f1266f1 CH |
1508 | |
1509 | #ifdef CONFIG_BLOCK | |
1510 | void invalidate_bdev(struct block_device *bdev); | |
1511 | int sync_blockdev(struct block_device *bdev); | |
97d6fb1b | 1512 | int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend); |
70164eb6 | 1513 | int sync_blockdev_nowait(struct block_device *bdev); |
1e03a36b | 1514 | void sync_bdevs(bool wait); |
2d985f8c | 1515 | void bdev_statx_dioalign(struct inode *inode, struct kstat *stat); |
322cbb50 | 1516 | void printk_all_partitions(void); |
2577f53f | 1517 | int __init early_lookup_bdev(const char *pathname, dev_t *dev); |
3f1266f1 CH |
1518 | #else |
1519 | static inline void invalidate_bdev(struct block_device *bdev) | |
1520 | { | |
1521 | } | |
1522 | static inline int sync_blockdev(struct block_device *bdev) | |
1523 | { | |
1524 | return 0; | |
1525 | } | |
70164eb6 CH |
1526 | static inline int sync_blockdev_nowait(struct block_device *bdev) |
1527 | { | |
1528 | return 0; | |
1529 | } | |
1e03a36b CH |
1530 | static inline void sync_bdevs(bool wait) |
1531 | { | |
1532 | } | |
2d985f8c EB |
1533 | static inline void bdev_statx_dioalign(struct inode *inode, struct kstat *stat) |
1534 | { | |
1535 | } | |
322cbb50 CH |
1536 | static inline void printk_all_partitions(void) |
1537 | { | |
1538 | } | |
cf056a43 CH |
1539 | static inline int early_lookup_bdev(const char *pathname, dev_t *dev) |
1540 | { | |
1541 | return -EINVAL; | |
1542 | } | |
322cbb50 CH |
1543 | #endif /* CONFIG_BLOCK */ |
1544 | ||
040f04bd CH |
1545 | int freeze_bdev(struct block_device *bdev); |
1546 | int thaw_bdev(struct block_device *bdev); | |
3f1266f1 | 1547 | |
5a72e899 JA |
1548 | struct io_comp_batch { |
1549 | struct request *req_list; | |
1550 | bool need_ts; | |
1551 | void (*complete)(struct io_comp_batch *); | |
1552 | }; | |
1553 | ||
1554 | #define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { } | |
1555 | ||
3f1266f1 | 1556 | #endif /* _LINUX_BLKDEV_H */ |