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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_BLKDEV_H |
3 | #define _LINUX_BLKDEV_H | |
4 | ||
85fd0bc9 | 5 | #include <linux/sched.h> |
e6017571 | 6 | #include <linux/sched/clock.h> |
1da177e4 LT |
7 | #include <linux/major.h> |
8 | #include <linux/genhd.h> | |
9 | #include <linux/list.h> | |
320ae51f | 10 | #include <linux/llist.h> |
1da177e4 LT |
11 | #include <linux/timer.h> |
12 | #include <linux/workqueue.h> | |
13 | #include <linux/pagemap.h> | |
66114cad | 14 | #include <linux/backing-dev-defs.h> |
1da177e4 LT |
15 | #include <linux/wait.h> |
16 | #include <linux/mempool.h> | |
34c0fd54 | 17 | #include <linux/pfn.h> |
1da177e4 | 18 | #include <linux/bio.h> |
1da177e4 | 19 | #include <linux/stringify.h> |
3e6053d7 | 20 | #include <linux/gfp.h> |
d351af01 | 21 | #include <linux/bsg.h> |
c7c22e4d | 22 | #include <linux/smp.h> |
548bc8e1 | 23 | #include <linux/rcupdate.h> |
add703fd | 24 | #include <linux/percpu-refcount.h> |
84be456f | 25 | #include <linux/scatterlist.h> |
6a0cb1bc | 26 | #include <linux/blkzoned.h> |
db04e18d | 27 | #include <linux/pm.h> |
1da177e4 | 28 | |
de477254 | 29 | struct module; |
21b2f0c8 CH |
30 | struct scsi_ioctl_command; |
31 | ||
1da177e4 | 32 | struct request_queue; |
1da177e4 | 33 | struct elevator_queue; |
2056a782 | 34 | struct blk_trace; |
3d6392cf JA |
35 | struct request; |
36 | struct sg_io_hdr; | |
aa387cc8 | 37 | struct bsg_job; |
3c798398 | 38 | struct blkcg_gq; |
7c94e1c1 | 39 | struct blk_flush_queue; |
bbd3e064 | 40 | struct pr_ops; |
a7905043 | 41 | struct rq_qos; |
34dbad5d OS |
42 | struct blk_queue_stats; |
43 | struct blk_stat_callback; | |
1b262839 | 44 | struct blk_keyslot_manager; |
1da177e4 LT |
45 | |
46 | #define BLKDEV_MIN_RQ 4 | |
47 | #define BLKDEV_MAX_RQ 128 /* Default maximum */ | |
48 | ||
096392e0 | 49 | /* Must be consistent with blk_mq_poll_stats_bkt() */ |
0206319f SB |
50 | #define BLK_MQ_POLL_STATS_BKTS 16 |
51 | ||
29ece8b4 YY |
52 | /* Doing classic polling */ |
53 | #define BLK_MQ_POLL_CLASSIC -1 | |
54 | ||
8bd435b3 TH |
55 | /* |
56 | * Maximum number of blkcg policies allowed to be registered concurrently. | |
57 | * Defined here to simplify include dependency. | |
58 | */ | |
01c5f85a | 59 | #define BLKCG_MAX_POLS 5 |
8bd435b3 | 60 | |
2a842aca | 61 | typedef void (rq_end_io_fn)(struct request *, blk_status_t); |
1da177e4 | 62 | |
e8064021 CH |
63 | /* |
64 | * request flags */ | |
65 | typedef __u32 __bitwise req_flags_t; | |
66 | ||
67 | /* elevator knows about this request */ | |
68 | #define RQF_SORTED ((__force req_flags_t)(1 << 0)) | |
69 | /* drive already may have started this one */ | |
70 | #define RQF_STARTED ((__force req_flags_t)(1 << 1)) | |
e8064021 CH |
71 | /* may not be passed by ioscheduler */ |
72 | #define RQF_SOFTBARRIER ((__force req_flags_t)(1 << 3)) | |
73 | /* request for flush sequence */ | |
74 | #define RQF_FLUSH_SEQ ((__force req_flags_t)(1 << 4)) | |
75 | /* merge of different types, fail separately */ | |
76 | #define RQF_MIXED_MERGE ((__force req_flags_t)(1 << 5)) | |
77 | /* track inflight for MQ */ | |
78 | #define RQF_MQ_INFLIGHT ((__force req_flags_t)(1 << 6)) | |
79 | /* don't call prep for this one */ | |
80 | #define RQF_DONTPREP ((__force req_flags_t)(1 << 7)) | |
81 | /* set for "ide_preempt" requests and also for requests for which the SCSI | |
82 | "quiesce" state must be ignored. */ | |
83 | #define RQF_PREEMPT ((__force req_flags_t)(1 << 8)) | |
e8064021 CH |
84 | /* vaguely specified driver internal error. Ignored by the block layer */ |
85 | #define RQF_FAILED ((__force req_flags_t)(1 << 10)) | |
86 | /* don't warn about errors */ | |
87 | #define RQF_QUIET ((__force req_flags_t)(1 << 11)) | |
88 | /* elevator private data attached */ | |
89 | #define RQF_ELVPRIV ((__force req_flags_t)(1 << 12)) | |
4822e902 | 90 | /* account into disk and partition IO statistics */ |
e8064021 CH |
91 | #define RQF_IO_STAT ((__force req_flags_t)(1 << 13)) |
92 | /* request came from our alloc pool */ | |
93 | #define RQF_ALLOCED ((__force req_flags_t)(1 << 14)) | |
94 | /* runtime pm request */ | |
95 | #define RQF_PM ((__force req_flags_t)(1 << 15)) | |
96 | /* on IO scheduler merge hash */ | |
97 | #define RQF_HASHED ((__force req_flags_t)(1 << 16)) | |
4822e902 | 98 | /* track IO completion time */ |
cf43e6be | 99 | #define RQF_STATS ((__force req_flags_t)(1 << 17)) |
f9d03f96 CH |
100 | /* Look at ->special_vec for the actual data payload instead of the |
101 | bio chain. */ | |
102 | #define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18)) | |
6cc77e9c CH |
103 | /* The per-zone write lock is held for this request */ |
104 | #define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19)) | |
76a86f9d | 105 | /* already slept for hybrid poll */ |
12f5b931 | 106 | #define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20)) |
da661267 CH |
107 | /* ->timeout has been called, don't expire again */ |
108 | #define RQF_TIMED_OUT ((__force req_flags_t)(1 << 21)) | |
e8064021 CH |
109 | |
110 | /* flags that prevent us from merging requests: */ | |
111 | #define RQF_NOMERGE_FLAGS \ | |
f9d03f96 | 112 | (RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD) |
e8064021 | 113 | |
12f5b931 KB |
114 | /* |
115 | * Request state for blk-mq. | |
116 | */ | |
117 | enum mq_rq_state { | |
118 | MQ_RQ_IDLE = 0, | |
119 | MQ_RQ_IN_FLIGHT = 1, | |
120 | MQ_RQ_COMPLETE = 2, | |
121 | }; | |
122 | ||
1da177e4 | 123 | /* |
af76e555 CH |
124 | * Try to put the fields that are referenced together in the same cacheline. |
125 | * | |
126 | * If you modify this structure, make sure to update blk_rq_init() and | |
127 | * especially blk_mq_rq_ctx_init() to take care of the added fields. | |
1da177e4 LT |
128 | */ |
129 | struct request { | |
165125e1 | 130 | struct request_queue *q; |
320ae51f | 131 | struct blk_mq_ctx *mq_ctx; |
ea4f995e | 132 | struct blk_mq_hw_ctx *mq_hctx; |
e6a1c874 | 133 | |
ef295ecf | 134 | unsigned int cmd_flags; /* op and common flags */ |
e8064021 | 135 | req_flags_t rq_flags; |
d486f1f2 | 136 | |
2f578aaf | 137 | int tag; |
d486f1f2 JA |
138 | int internal_tag; |
139 | ||
a2dec7b3 | 140 | /* the following two fields are internal, NEVER access directly */ |
a2dec7b3 | 141 | unsigned int __data_len; /* total data len */ |
181fdde3 | 142 | sector_t __sector; /* sector cursor */ |
1da177e4 LT |
143 | |
144 | struct bio *bio; | |
145 | struct bio *biotail; | |
146 | ||
7c3fb70f JA |
147 | struct list_head queuelist; |
148 | ||
360f92c2 JA |
149 | /* |
150 | * The hash is used inside the scheduler, and killed once the | |
151 | * request reaches the dispatch list. The ipi_list is only used | |
152 | * to queue the request for softirq completion, which is long | |
153 | * after the request has been unhashed (and even removed from | |
154 | * the dispatch list). | |
155 | */ | |
156 | union { | |
157 | struct hlist_node hash; /* merge hash */ | |
158 | struct list_head ipi_list; | |
159 | }; | |
160 | ||
e6a1c874 JA |
161 | /* |
162 | * The rb_node is only used inside the io scheduler, requests | |
163 | * are pruned when moved to the dispatch queue. So let the | |
c186794d | 164 | * completion_data share space with the rb_node. |
e6a1c874 JA |
165 | */ |
166 | union { | |
167 | struct rb_node rb_node; /* sort/lookup */ | |
f9d03f96 | 168 | struct bio_vec special_vec; |
c186794d | 169 | void *completion_data; |
e26738e0 | 170 | int error_count; /* for legacy drivers, don't use */ |
e6a1c874 | 171 | }; |
9817064b | 172 | |
ff7d145f | 173 | /* |
7f1dc8a2 | 174 | * Three pointers are available for the IO schedulers, if they need |
c186794d MS |
175 | * more they have to dynamically allocate it. Flush requests are |
176 | * never put on the IO scheduler. So let the flush fields share | |
a612fddf | 177 | * space with the elevator data. |
ff7d145f | 178 | */ |
c186794d | 179 | union { |
a612fddf TH |
180 | struct { |
181 | struct io_cq *icq; | |
182 | void *priv[2]; | |
183 | } elv; | |
184 | ||
c186794d MS |
185 | struct { |
186 | unsigned int seq; | |
187 | struct list_head list; | |
4853abaa | 188 | rq_end_io_fn *saved_end_io; |
c186794d MS |
189 | } flush; |
190 | }; | |
ff7d145f | 191 | |
8f34ee75 | 192 | struct gendisk *rq_disk; |
09e099d4 | 193 | struct hd_struct *part; |
6f816b4b TH |
194 | #ifdef CONFIG_BLK_RQ_ALLOC_TIME |
195 | /* Time that the first bio started allocating this request. */ | |
196 | u64 alloc_time_ns; | |
197 | #endif | |
198 | /* Time that this request was allocated for this IO. */ | |
522a7775 | 199 | u64 start_time_ns; |
544ccc8d OS |
200 | /* Time that I/O was submitted to the device. */ |
201 | u64 io_start_time_ns; | |
202 | ||
203 | #ifdef CONFIG_BLK_WBT | |
204 | unsigned short wbt_flags; | |
205 | #endif | |
3d244306 HT |
206 | /* |
207 | * rq sectors used for blk stats. It has the same value | |
208 | * with blk_rq_sectors(rq), except that it never be zeroed | |
209 | * by completion. | |
210 | */ | |
211 | unsigned short stats_sectors; | |
544ccc8d OS |
212 | |
213 | /* | |
214 | * Number of scatter-gather DMA addr+len pairs after | |
1da177e4 LT |
215 | * physical address coalescing is performed. |
216 | */ | |
217 | unsigned short nr_phys_segments; | |
7c3fb70f | 218 | |
13f05c8d MP |
219 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
220 | unsigned short nr_integrity_segments; | |
221 | #endif | |
1da177e4 | 222 | |
a892c8d5 ST |
223 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
224 | struct bio_crypt_ctx *crypt_ctx; | |
225 | struct blk_ksm_keyslot *crypt_keyslot; | |
226 | #endif | |
227 | ||
7c3fb70f | 228 | unsigned short write_hint; |
8f34ee75 JA |
229 | unsigned short ioprio; |
230 | ||
12f5b931 KB |
231 | enum mq_rq_state state; |
232 | refcount_t ref; | |
1d9bd516 | 233 | |
0b7576d8 | 234 | unsigned int timeout; |
079076b3 | 235 | unsigned long deadline; |
cb6934f8 | 236 | |
7c3fb70f | 237 | union { |
0a4b6e2f | 238 | struct __call_single_data csd; |
7c3fb70f JA |
239 | u64 fifo_time; |
240 | }; | |
241 | ||
1da177e4 | 242 | /* |
c00895ab | 243 | * completion callback. |
1da177e4 LT |
244 | */ |
245 | rq_end_io_fn *end_io; | |
246 | void *end_io_data; | |
247 | }; | |
248 | ||
14cb0dc6 ML |
249 | static inline bool blk_op_is_scsi(unsigned int op) |
250 | { | |
251 | return op == REQ_OP_SCSI_IN || op == REQ_OP_SCSI_OUT; | |
252 | } | |
253 | ||
254 | static inline bool blk_op_is_private(unsigned int op) | |
255 | { | |
256 | return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT; | |
257 | } | |
258 | ||
aebf526b CH |
259 | static inline bool blk_rq_is_scsi(struct request *rq) |
260 | { | |
14cb0dc6 | 261 | return blk_op_is_scsi(req_op(rq)); |
aebf526b CH |
262 | } |
263 | ||
264 | static inline bool blk_rq_is_private(struct request *rq) | |
265 | { | |
14cb0dc6 | 266 | return blk_op_is_private(req_op(rq)); |
aebf526b CH |
267 | } |
268 | ||
57292b58 CH |
269 | static inline bool blk_rq_is_passthrough(struct request *rq) |
270 | { | |
aebf526b | 271 | return blk_rq_is_scsi(rq) || blk_rq_is_private(rq); |
57292b58 CH |
272 | } |
273 | ||
14cb0dc6 ML |
274 | static inline bool bio_is_passthrough(struct bio *bio) |
275 | { | |
276 | unsigned op = bio_op(bio); | |
277 | ||
278 | return blk_op_is_scsi(op) || blk_op_is_private(op); | |
279 | } | |
280 | ||
766ca442 FLVC |
281 | static inline unsigned short req_get_ioprio(struct request *req) |
282 | { | |
283 | return req->ioprio; | |
284 | } | |
285 | ||
1da177e4 LT |
286 | #include <linux/elevator.h> |
287 | ||
320ae51f JA |
288 | struct blk_queue_ctx; |
289 | ||
1da177e4 | 290 | struct bio_vec; |
1da177e4 | 291 | |
242f9dcb | 292 | enum blk_eh_timer_return { |
88b0cfad CH |
293 | BLK_EH_DONE, /* drivers has completed the command */ |
294 | BLK_EH_RESET_TIMER, /* reset timer and try again */ | |
242f9dcb JA |
295 | }; |
296 | ||
1da177e4 LT |
297 | enum blk_queue_state { |
298 | Queue_down, | |
299 | Queue_up, | |
300 | }; | |
301 | ||
ee1b6f7a SL |
302 | #define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */ |
303 | #define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */ | |
1da177e4 | 304 | |
abf54393 FT |
305 | #define BLK_SCSI_MAX_CMDS (256) |
306 | #define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8)) | |
307 | ||
797476b8 DLM |
308 | /* |
309 | * Zoned block device models (zoned limit). | |
3093a479 CH |
310 | * |
311 | * Note: This needs to be ordered from the least to the most severe | |
312 | * restrictions for the inheritance in blk_stack_limits() to work. | |
797476b8 DLM |
313 | */ |
314 | enum blk_zoned_model { | |
3093a479 CH |
315 | BLK_ZONED_NONE = 0, /* Regular block device */ |
316 | BLK_ZONED_HA, /* Host-aware zoned block device */ | |
317 | BLK_ZONED_HM, /* Host-managed zoned block device */ | |
797476b8 DLM |
318 | }; |
319 | ||
025146e1 MP |
320 | struct queue_limits { |
321 | unsigned long bounce_pfn; | |
322 | unsigned long seg_boundary_mask; | |
03100aad | 323 | unsigned long virt_boundary_mask; |
025146e1 MP |
324 | |
325 | unsigned int max_hw_sectors; | |
ca369d51 | 326 | unsigned int max_dev_sectors; |
762380ad | 327 | unsigned int chunk_sectors; |
025146e1 MP |
328 | unsigned int max_sectors; |
329 | unsigned int max_segment_size; | |
c72758f3 | 330 | unsigned int physical_block_size; |
ad6bf88a | 331 | unsigned int logical_block_size; |
c72758f3 MP |
332 | unsigned int alignment_offset; |
333 | unsigned int io_min; | |
334 | unsigned int io_opt; | |
67efc925 | 335 | unsigned int max_discard_sectors; |
0034af03 | 336 | unsigned int max_hw_discard_sectors; |
4363ac7c | 337 | unsigned int max_write_same_sectors; |
a6f0788e | 338 | unsigned int max_write_zeroes_sectors; |
0512a75b | 339 | unsigned int max_zone_append_sectors; |
86b37281 MP |
340 | unsigned int discard_granularity; |
341 | unsigned int discard_alignment; | |
025146e1 | 342 | |
8a78362c | 343 | unsigned short max_segments; |
13f05c8d | 344 | unsigned short max_integrity_segments; |
1e739730 | 345 | unsigned short max_discard_segments; |
025146e1 | 346 | |
c72758f3 | 347 | unsigned char misaligned; |
86b37281 | 348 | unsigned char discard_misaligned; |
c78afc62 | 349 | unsigned char raid_partial_stripes_expensive; |
797476b8 | 350 | enum blk_zoned_model zoned; |
025146e1 MP |
351 | }; |
352 | ||
d4100351 CH |
353 | typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx, |
354 | void *data); | |
355 | ||
6a0cb1bc HR |
356 | #ifdef CONFIG_BLK_DEV_ZONED |
357 | ||
d4100351 CH |
358 | #define BLK_ALL_ZONES ((unsigned int)-1) |
359 | int blkdev_report_zones(struct block_device *bdev, sector_t sector, | |
360 | unsigned int nr_zones, report_zones_cb cb, void *data); | |
9b38bb4b | 361 | unsigned int blkdev_nr_zones(struct gendisk *disk); |
6c1b1da5 AJ |
362 | extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, |
363 | sector_t sectors, sector_t nr_sectors, | |
364 | gfp_t gfp_mask); | |
e732671a DLM |
365 | int blk_revalidate_disk_zones(struct gendisk *disk, |
366 | void (*update_driver_data)(struct gendisk *disk)); | |
6a0cb1bc | 367 | |
3ed05a98 ST |
368 | extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, |
369 | unsigned int cmd, unsigned long arg); | |
e876df1f AJ |
370 | extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, |
371 | unsigned int cmd, unsigned long arg); | |
3ed05a98 ST |
372 | |
373 | #else /* CONFIG_BLK_DEV_ZONED */ | |
374 | ||
9b38bb4b | 375 | static inline unsigned int blkdev_nr_zones(struct gendisk *disk) |
a91e1380 DLM |
376 | { |
377 | return 0; | |
378 | } | |
bf505456 | 379 | |
3ed05a98 ST |
380 | static inline int blkdev_report_zones_ioctl(struct block_device *bdev, |
381 | fmode_t mode, unsigned int cmd, | |
382 | unsigned long arg) | |
383 | { | |
384 | return -ENOTTY; | |
385 | } | |
386 | ||
e876df1f AJ |
387 | static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev, |
388 | fmode_t mode, unsigned int cmd, | |
389 | unsigned long arg) | |
3ed05a98 ST |
390 | { |
391 | return -ENOTTY; | |
392 | } | |
393 | ||
6a0cb1bc HR |
394 | #endif /* CONFIG_BLK_DEV_ZONED */ |
395 | ||
d7b76301 | 396 | struct request_queue { |
1da177e4 | 397 | struct request *last_merge; |
b374d18a | 398 | struct elevator_queue *elevator; |
1da177e4 | 399 | |
34dbad5d | 400 | struct blk_queue_stats *stats; |
a7905043 | 401 | struct rq_qos *rq_qos; |
87760e5e | 402 | |
f8a5b122 | 403 | const struct blk_mq_ops *mq_ops; |
320ae51f | 404 | |
320ae51f | 405 | /* sw queues */ |
e6cdb092 | 406 | struct blk_mq_ctx __percpu *queue_ctx; |
320ae51f | 407 | |
d278d4a8 JA |
408 | unsigned int queue_depth; |
409 | ||
320ae51f JA |
410 | /* hw dispatch queues */ |
411 | struct blk_mq_hw_ctx **queue_hw_ctx; | |
412 | unsigned int nr_hw_queues; | |
413 | ||
dc3b17cc | 414 | struct backing_dev_info *backing_dev_info; |
1da177e4 LT |
415 | |
416 | /* | |
417 | * The queue owner gets to use this for whatever they like. | |
418 | * ll_rw_blk doesn't touch it. | |
419 | */ | |
420 | void *queuedata; | |
421 | ||
1da177e4 | 422 | /* |
d7b76301 | 423 | * various queue flags, see QUEUE_* below |
1da177e4 | 424 | */ |
d7b76301 | 425 | unsigned long queue_flags; |
cd84a62e BVA |
426 | /* |
427 | * Number of contexts that have called blk_set_pm_only(). If this | |
428 | * counter is above zero then only RQF_PM and RQF_PREEMPT requests are | |
429 | * processed. | |
430 | */ | |
431 | atomic_t pm_only; | |
1da177e4 | 432 | |
a73f730d TH |
433 | /* |
434 | * ida allocated id for this queue. Used to index queues from | |
435 | * ioctx. | |
436 | */ | |
437 | int id; | |
438 | ||
1da177e4 | 439 | /* |
d7b76301 | 440 | * queue needs bounce pages for pages above this limit |
1da177e4 | 441 | */ |
d7b76301 | 442 | gfp_t bounce_gfp; |
1da177e4 | 443 | |
0d945c1f | 444 | spinlock_t queue_lock; |
1da177e4 LT |
445 | |
446 | /* | |
447 | * queue kobject | |
448 | */ | |
449 | struct kobject kobj; | |
450 | ||
320ae51f JA |
451 | /* |
452 | * mq queue kobject | |
453 | */ | |
1db4909e | 454 | struct kobject *mq_kobj; |
320ae51f | 455 | |
ac6fc48c DW |
456 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
457 | struct blk_integrity integrity; | |
458 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
459 | ||
47fafbc7 | 460 | #ifdef CONFIG_PM |
6c954667 | 461 | struct device *dev; |
db04e18d | 462 | enum rpm_status rpm_status; |
6c954667 LM |
463 | unsigned int nr_pending; |
464 | #endif | |
465 | ||
1da177e4 LT |
466 | /* |
467 | * queue settings | |
468 | */ | |
469 | unsigned long nr_requests; /* Max # of requests */ | |
1da177e4 | 470 | |
e3790c7d | 471 | unsigned int dma_pad_mask; |
1da177e4 LT |
472 | unsigned int dma_alignment; |
473 | ||
1b262839 ST |
474 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
475 | /* Inline crypto capabilities */ | |
476 | struct blk_keyslot_manager *ksm; | |
477 | #endif | |
478 | ||
242f9dcb | 479 | unsigned int rq_timeout; |
64f1c21e | 480 | int poll_nsec; |
34dbad5d OS |
481 | |
482 | struct blk_stat_callback *poll_cb; | |
0206319f | 483 | struct blk_rq_stat poll_stat[BLK_MQ_POLL_STATS_BKTS]; |
34dbad5d | 484 | |
242f9dcb | 485 | struct timer_list timeout; |
287922eb | 486 | struct work_struct timeout_work; |
242f9dcb | 487 | |
bccf5e26 JG |
488 | atomic_t nr_active_requests_shared_sbitmap; |
489 | ||
a612fddf | 490 | struct list_head icq_list; |
4eef3049 | 491 | #ifdef CONFIG_BLK_CGROUP |
a2b1693b | 492 | DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS); |
3c798398 | 493 | struct blkcg_gq *root_blkg; |
03aa264a | 494 | struct list_head blkg_list; |
4eef3049 | 495 | #endif |
a612fddf | 496 | |
025146e1 MP |
497 | struct queue_limits limits; |
498 | ||
68c43f13 DLM |
499 | unsigned int required_elevator_features; |
500 | ||
6a5ac984 | 501 | #ifdef CONFIG_BLK_DEV_ZONED |
6cc77e9c CH |
502 | /* |
503 | * Zoned block device information for request dispatch control. | |
504 | * nr_zones is the total number of zones of the device. This is always | |
f216fdd7 CH |
505 | * 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones |
506 | * bits which indicates if a zone is conventional (bit set) or | |
507 | * sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones | |
6cc77e9c CH |
508 | * bits which indicates if a zone is write locked, that is, if a write |
509 | * request targeting the zone was dispatched. All three fields are | |
510 | * initialized by the low level device driver (e.g. scsi/sd.c). | |
511 | * Stacking drivers (device mappers) may or may not initialize | |
512 | * these fields. | |
ccce20fc BVA |
513 | * |
514 | * Reads of this information must be protected with blk_queue_enter() / | |
515 | * blk_queue_exit(). Modifying this information is only allowed while | |
516 | * no requests are being processed. See also blk_mq_freeze_queue() and | |
517 | * blk_mq_unfreeze_queue(). | |
6cc77e9c CH |
518 | */ |
519 | unsigned int nr_zones; | |
f216fdd7 | 520 | unsigned long *conv_zones_bitmap; |
6cc77e9c | 521 | unsigned long *seq_zones_wlock; |
e15864f8 | 522 | unsigned int max_open_zones; |
659bf827 | 523 | unsigned int max_active_zones; |
6a5ac984 | 524 | #endif /* CONFIG_BLK_DEV_ZONED */ |
6cc77e9c | 525 | |
1da177e4 LT |
526 | /* |
527 | * sg stuff | |
528 | */ | |
529 | unsigned int sg_timeout; | |
530 | unsigned int sg_reserved_size; | |
1946089a | 531 | int node; |
85e0cbbb | 532 | struct mutex debugfs_mutex; |
6c5c9341 | 533 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
c780e86d | 534 | struct blk_trace __rcu *blk_trace; |
6c5c9341 | 535 | #endif |
1da177e4 | 536 | /* |
4913efe4 | 537 | * for flush operations |
1da177e4 | 538 | */ |
7c94e1c1 | 539 | struct blk_flush_queue *fq; |
483f4afc | 540 | |
6fca6a61 CH |
541 | struct list_head requeue_list; |
542 | spinlock_t requeue_lock; | |
2849450a | 543 | struct delayed_work requeue_work; |
6fca6a61 | 544 | |
483f4afc | 545 | struct mutex sysfs_lock; |
cecf5d87 | 546 | struct mutex sysfs_dir_lock; |
d351af01 | 547 | |
2f8f1336 ML |
548 | /* |
549 | * for reusing dead hctx instance in case of updating | |
550 | * nr_hw_queues | |
551 | */ | |
552 | struct list_head unused_hctx_list; | |
553 | spinlock_t unused_hctx_lock; | |
554 | ||
7996a8b5 | 555 | int mq_freeze_depth; |
d732580b | 556 | |
d351af01 FT |
557 | #if defined(CONFIG_BLK_DEV_BSG) |
558 | struct bsg_class_device bsg_dev; | |
559 | #endif | |
e43473b7 VG |
560 | |
561 | #ifdef CONFIG_BLK_DEV_THROTTLING | |
562 | /* Throttle data */ | |
563 | struct throtl_data *td; | |
564 | #endif | |
548bc8e1 | 565 | struct rcu_head rcu_head; |
320ae51f | 566 | wait_queue_head_t mq_freeze_wq; |
7996a8b5 BL |
567 | /* |
568 | * Protect concurrent access to q_usage_counter by | |
569 | * percpu_ref_kill() and percpu_ref_reinit(). | |
570 | */ | |
571 | struct mutex mq_freeze_lock; | |
3ef28e83 | 572 | struct percpu_ref q_usage_counter; |
0d2602ca JA |
573 | |
574 | struct blk_mq_tag_set *tag_set; | |
575 | struct list_head tag_set_list; | |
338aa96d | 576 | struct bio_set bio_split; |
4593fdbe | 577 | |
07e4fead | 578 | struct dentry *debugfs_dir; |
85e0cbbb LC |
579 | |
580 | #ifdef CONFIG_BLK_DEBUG_FS | |
d332ce09 | 581 | struct dentry *sched_debugfs_dir; |
cc56694f | 582 | struct dentry *rqos_debugfs_dir; |
07e4fead OS |
583 | #endif |
584 | ||
4593fdbe | 585 | bool mq_sysfs_init_done; |
6d247d7f CH |
586 | |
587 | size_t cmd_size; | |
dc9edc44 | 588 | |
f793dfd3 JA |
589 | #define BLK_MAX_WRITE_HINTS 5 |
590 | u64 write_hints[BLK_MAX_WRITE_HINTS]; | |
1da177e4 LT |
591 | }; |
592 | ||
bfe373f6 | 593 | /* Keep blk_queue_flag_name[] in sync with the definitions below */ |
eca7abf3 JA |
594 | #define QUEUE_FLAG_STOPPED 0 /* queue is stopped */ |
595 | #define QUEUE_FLAG_DYING 1 /* queue being torn down */ | |
eca7abf3 JA |
596 | #define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */ |
597 | #define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */ | |
598 | #define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */ | |
599 | #define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */ | |
600 | #define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */ | |
601 | #define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */ | |
602 | #define QUEUE_FLAG_DISCARD 8 /* supports DISCARD */ | |
603 | #define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */ | |
604 | #define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */ | |
605 | #define QUEUE_FLAG_SECERASE 11 /* supports secure erase */ | |
606 | #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */ | |
607 | #define QUEUE_FLAG_DEAD 13 /* queue tear-down finished */ | |
608 | #define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */ | |
1cb039f3 | 609 | #define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */ |
eca7abf3 JA |
610 | #define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */ |
611 | #define QUEUE_FLAG_WC 17 /* Write back caching */ | |
612 | #define QUEUE_FLAG_FUA 18 /* device supports FUA writes */ | |
613 | #define QUEUE_FLAG_DAX 19 /* device supports DAX */ | |
614 | #define QUEUE_FLAG_STATS 20 /* track IO start and completion times */ | |
615 | #define QUEUE_FLAG_POLL_STATS 21 /* collecting stats for hybrid polling */ | |
616 | #define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */ | |
617 | #define QUEUE_FLAG_SCSI_PASSTHROUGH 23 /* queue supports SCSI commands */ | |
618 | #define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */ | |
619 | #define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */ | |
e84e8f06 | 620 | #define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */ |
6f816b4b | 621 | #define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */ |
f1b49fdc | 622 | #define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */ |
797e7dbb | 623 | |
94eddfbe | 624 | #define QUEUE_FLAG_MQ_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \ |
6e0de611 | 625 | (1 << QUEUE_FLAG_SAME_COMP)) |
94eddfbe | 626 | |
8814ce8a BVA |
627 | void blk_queue_flag_set(unsigned int flag, struct request_queue *q); |
628 | void blk_queue_flag_clear(unsigned int flag, struct request_queue *q); | |
629 | bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); | |
8814ce8a | 630 | |
1da177e4 | 631 | #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags) |
3f3299d5 | 632 | #define blk_queue_dying(q) test_bit(QUEUE_FLAG_DYING, &(q)->queue_flags) |
c246e80d | 633 | #define blk_queue_dead(q) test_bit(QUEUE_FLAG_DEAD, &(q)->queue_flags) |
320ae51f | 634 | #define blk_queue_init_done(q) test_bit(QUEUE_FLAG_INIT_DONE, &(q)->queue_flags) |
ac9fafa1 | 635 | #define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags) |
488991e2 AB |
636 | #define blk_queue_noxmerges(q) \ |
637 | test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags) | |
a68bbddb | 638 | #define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags) |
1cb039f3 CH |
639 | #define blk_queue_stable_writes(q) \ |
640 | test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags) | |
bc58ba94 | 641 | #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) |
e2e1a148 | 642 | #define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags) |
c15227de | 643 | #define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags) |
e84e8f06 CK |
644 | #define blk_queue_zone_resetall(q) \ |
645 | test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags) | |
288dab8a CH |
646 | #define blk_queue_secure_erase(q) \ |
647 | (test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags)) | |
163d4baa | 648 | #define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags) |
9efc160f BVA |
649 | #define blk_queue_scsi_passthrough(q) \ |
650 | test_bit(QUEUE_FLAG_SCSI_PASSTHROUGH, &(q)->queue_flags) | |
49d92c0d LG |
651 | #define blk_queue_pci_p2pdma(q) \ |
652 | test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags) | |
6f816b4b TH |
653 | #ifdef CONFIG_BLK_RQ_ALLOC_TIME |
654 | #define blk_queue_rq_alloc_time(q) \ | |
655 | test_bit(QUEUE_FLAG_RQ_ALLOC_TIME, &(q)->queue_flags) | |
656 | #else | |
657 | #define blk_queue_rq_alloc_time(q) false | |
658 | #endif | |
1da177e4 | 659 | |
33659ebb CH |
660 | #define blk_noretry_request(rq) \ |
661 | ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \ | |
662 | REQ_FAILFAST_DRIVER)) | |
f4560ffe | 663 | #define blk_queue_quiesced(q) test_bit(QUEUE_FLAG_QUIESCED, &(q)->queue_flags) |
cd84a62e | 664 | #define blk_queue_pm_only(q) atomic_read(&(q)->pm_only) |
0ce91444 | 665 | #define blk_queue_fua(q) test_bit(QUEUE_FLAG_FUA, &(q)->queue_flags) |
58c898ba | 666 | #define blk_queue_registered(q) test_bit(QUEUE_FLAG_REGISTERED, &(q)->queue_flags) |
c9254f2d | 667 | |
cd84a62e BVA |
668 | extern void blk_set_pm_only(struct request_queue *q); |
669 | extern void blk_clear_pm_only(struct request_queue *q); | |
33659ebb | 670 | |
57292b58 CH |
671 | static inline bool blk_account_rq(struct request *rq) |
672 | { | |
673 | return (rq->rq_flags & RQF_STARTED) && !blk_rq_is_passthrough(rq); | |
674 | } | |
33659ebb | 675 | |
1da177e4 LT |
676 | #define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist) |
677 | ||
4e1b2d52 | 678 | #define rq_data_dir(rq) (op_is_write(req_op(rq)) ? WRITE : READ) |
1da177e4 | 679 | |
9d9de535 CH |
680 | #define rq_dma_dir(rq) \ |
681 | (op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE) | |
682 | ||
3ab3a031 CH |
683 | #define dma_map_bvec(dev, bv, dir, attrs) \ |
684 | dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \ | |
685 | (dir), (attrs)) | |
686 | ||
344e9ffc | 687 | static inline bool queue_is_mq(struct request_queue *q) |
49fd524f | 688 | { |
a1ce35fa | 689 | return q->mq_ops; |
49fd524f JA |
690 | } |
691 | ||
797476b8 DLM |
692 | static inline enum blk_zoned_model |
693 | blk_queue_zoned_model(struct request_queue *q) | |
694 | { | |
695 | return q->limits.zoned; | |
696 | } | |
697 | ||
698 | static inline bool blk_queue_is_zoned(struct request_queue *q) | |
699 | { | |
700 | switch (blk_queue_zoned_model(q)) { | |
701 | case BLK_ZONED_HA: | |
702 | case BLK_ZONED_HM: | |
703 | return true; | |
704 | default: | |
705 | return false; | |
706 | } | |
707 | } | |
708 | ||
113ab72e | 709 | static inline sector_t blk_queue_zone_sectors(struct request_queue *q) |
6a0cb1bc HR |
710 | { |
711 | return blk_queue_is_zoned(q) ? q->limits.chunk_sectors : 0; | |
712 | } | |
713 | ||
6a5ac984 | 714 | #ifdef CONFIG_BLK_DEV_ZONED |
965b652e DLM |
715 | static inline unsigned int blk_queue_nr_zones(struct request_queue *q) |
716 | { | |
717 | return blk_queue_is_zoned(q) ? q->nr_zones : 0; | |
718 | } | |
719 | ||
6cc77e9c CH |
720 | static inline unsigned int blk_queue_zone_no(struct request_queue *q, |
721 | sector_t sector) | |
722 | { | |
723 | if (!blk_queue_is_zoned(q)) | |
724 | return 0; | |
725 | return sector >> ilog2(q->limits.chunk_sectors); | |
726 | } | |
727 | ||
728 | static inline bool blk_queue_zone_is_seq(struct request_queue *q, | |
729 | sector_t sector) | |
730 | { | |
f216fdd7 | 731 | if (!blk_queue_is_zoned(q)) |
6cc77e9c | 732 | return false; |
f216fdd7 CH |
733 | if (!q->conv_zones_bitmap) |
734 | return true; | |
735 | return !test_bit(blk_queue_zone_no(q, sector), q->conv_zones_bitmap); | |
6cc77e9c | 736 | } |
e15864f8 NC |
737 | |
738 | static inline void blk_queue_max_open_zones(struct request_queue *q, | |
739 | unsigned int max_open_zones) | |
740 | { | |
741 | q->max_open_zones = max_open_zones; | |
742 | } | |
743 | ||
744 | static inline unsigned int queue_max_open_zones(const struct request_queue *q) | |
745 | { | |
746 | return q->max_open_zones; | |
747 | } | |
659bf827 NC |
748 | |
749 | static inline void blk_queue_max_active_zones(struct request_queue *q, | |
750 | unsigned int max_active_zones) | |
751 | { | |
752 | q->max_active_zones = max_active_zones; | |
753 | } | |
754 | ||
755 | static inline unsigned int queue_max_active_zones(const struct request_queue *q) | |
756 | { | |
757 | return q->max_active_zones; | |
758 | } | |
965b652e DLM |
759 | #else /* CONFIG_BLK_DEV_ZONED */ |
760 | static inline unsigned int blk_queue_nr_zones(struct request_queue *q) | |
761 | { | |
762 | return 0; | |
763 | } | |
02992df8 JT |
764 | static inline bool blk_queue_zone_is_seq(struct request_queue *q, |
765 | sector_t sector) | |
766 | { | |
767 | return false; | |
768 | } | |
769 | static inline unsigned int blk_queue_zone_no(struct request_queue *q, | |
770 | sector_t sector) | |
771 | { | |
772 | return 0; | |
773 | } | |
e15864f8 NC |
774 | static inline unsigned int queue_max_open_zones(const struct request_queue *q) |
775 | { | |
776 | return 0; | |
777 | } | |
659bf827 NC |
778 | static inline unsigned int queue_max_active_zones(const struct request_queue *q) |
779 | { | |
780 | return 0; | |
781 | } | |
6a5ac984 | 782 | #endif /* CONFIG_BLK_DEV_ZONED */ |
6cc77e9c | 783 | |
1faa16d2 JA |
784 | static inline bool rq_is_sync(struct request *rq) |
785 | { | |
ef295ecf | 786 | return op_is_sync(rq->cmd_flags); |
1faa16d2 JA |
787 | } |
788 | ||
e2a60da7 MP |
789 | static inline bool rq_mergeable(struct request *rq) |
790 | { | |
57292b58 | 791 | if (blk_rq_is_passthrough(rq)) |
e2a60da7 | 792 | return false; |
1da177e4 | 793 | |
3a5e02ce MC |
794 | if (req_op(rq) == REQ_OP_FLUSH) |
795 | return false; | |
796 | ||
a6f0788e CK |
797 | if (req_op(rq) == REQ_OP_WRITE_ZEROES) |
798 | return false; | |
799 | ||
0512a75b KB |
800 | if (req_op(rq) == REQ_OP_ZONE_APPEND) |
801 | return false; | |
802 | ||
e2a60da7 | 803 | if (rq->cmd_flags & REQ_NOMERGE_FLAGS) |
e8064021 CH |
804 | return false; |
805 | if (rq->rq_flags & RQF_NOMERGE_FLAGS) | |
e2a60da7 MP |
806 | return false; |
807 | ||
808 | return true; | |
809 | } | |
1da177e4 | 810 | |
4363ac7c MP |
811 | static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b) |
812 | { | |
efbeccdb CH |
813 | if (bio_page(a) == bio_page(b) && |
814 | bio_offset(a) == bio_offset(b)) | |
4363ac7c MP |
815 | return true; |
816 | ||
817 | return false; | |
818 | } | |
819 | ||
d278d4a8 JA |
820 | static inline unsigned int blk_queue_depth(struct request_queue *q) |
821 | { | |
822 | if (q->queue_depth) | |
823 | return q->queue_depth; | |
824 | ||
825 | return q->nr_requests; | |
826 | } | |
827 | ||
1da177e4 LT |
828 | extern unsigned long blk_max_low_pfn, blk_max_pfn; |
829 | ||
830 | /* | |
831 | * standard bounce addresses: | |
832 | * | |
833 | * BLK_BOUNCE_HIGH : bounce all highmem pages | |
834 | * BLK_BOUNCE_ANY : don't bounce anything | |
835 | * BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary | |
836 | */ | |
2472892a AK |
837 | |
838 | #if BITS_PER_LONG == 32 | |
1da177e4 | 839 | #define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT) |
2472892a AK |
840 | #else |
841 | #define BLK_BOUNCE_HIGH -1ULL | |
842 | #endif | |
843 | #define BLK_BOUNCE_ANY (-1ULL) | |
bfe17231 | 844 | #define BLK_BOUNCE_ISA (DMA_BIT_MASK(24)) |
1da177e4 | 845 | |
3d6392cf JA |
846 | /* |
847 | * default timeout for SG_IO if none specified | |
848 | */ | |
849 | #define BLK_DEFAULT_SG_TIMEOUT (60 * HZ) | |
f2f1fa78 | 850 | #define BLK_MIN_SG_TIMEOUT (7 * HZ) |
3d6392cf | 851 | |
152e283f FT |
852 | struct rq_map_data { |
853 | struct page **pages; | |
854 | int page_order; | |
855 | int nr_entries; | |
56c451f4 | 856 | unsigned long offset; |
97ae77a1 | 857 | int null_mapped; |
ecb554a8 | 858 | int from_user; |
152e283f FT |
859 | }; |
860 | ||
5705f702 | 861 | struct req_iterator { |
7988613b | 862 | struct bvec_iter iter; |
5705f702 N |
863 | struct bio *bio; |
864 | }; | |
865 | ||
866 | /* This should not be used directly - use rq_for_each_segment */ | |
1e428079 JA |
867 | #define for_each_bio(_bio) \ |
868 | for (; _bio; _bio = _bio->bi_next) | |
5705f702 | 869 | #define __rq_for_each_bio(_bio, rq) \ |
1da177e4 LT |
870 | if ((rq->bio)) \ |
871 | for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next) | |
872 | ||
5705f702 N |
873 | #define rq_for_each_segment(bvl, _rq, _iter) \ |
874 | __rq_for_each_bio(_iter.bio, _rq) \ | |
7988613b | 875 | bio_for_each_segment(bvl, _iter.bio, _iter.iter) |
5705f702 | 876 | |
d18d9174 ML |
877 | #define rq_for_each_bvec(bvl, _rq, _iter) \ |
878 | __rq_for_each_bio(_iter.bio, _rq) \ | |
879 | bio_for_each_bvec(bvl, _iter.bio, _iter.iter) | |
880 | ||
4550dd6c | 881 | #define rq_iter_last(bvec, _iter) \ |
7988613b | 882 | (_iter.bio->bi_next == NULL && \ |
4550dd6c | 883 | bio_iter_last(bvec, _iter.iter)) |
5705f702 | 884 | |
2d4dc890 IL |
885 | #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE |
886 | # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform" | |
887 | #endif | |
888 | #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE | |
889 | extern void rq_flush_dcache_pages(struct request *rq); | |
890 | #else | |
891 | static inline void rq_flush_dcache_pages(struct request *rq) | |
892 | { | |
893 | } | |
894 | #endif | |
895 | ||
1da177e4 LT |
896 | extern int blk_register_queue(struct gendisk *disk); |
897 | extern void blk_unregister_queue(struct gendisk *disk); | |
ed00aabd | 898 | blk_qc_t submit_bio_noacct(struct bio *bio); |
2a4aa30c | 899 | extern void blk_rq_init(struct request_queue *q, struct request *rq); |
1da177e4 | 900 | extern void blk_put_request(struct request *); |
cd6ce148 | 901 | extern struct request *blk_get_request(struct request_queue *, unsigned int op, |
ff005a06 | 902 | blk_mq_req_flags_t flags); |
ef9e3fac | 903 | extern int blk_lld_busy(struct request_queue *q); |
78d8e58a MS |
904 | extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src, |
905 | struct bio_set *bs, gfp_t gfp_mask, | |
906 | int (*bio_ctr)(struct bio *, struct bio *, void *), | |
907 | void *data); | |
908 | extern void blk_rq_unprep_clone(struct request *rq); | |
2a842aca | 909 | extern blk_status_t blk_insert_cloned_request(struct request_queue *q, |
82124d60 | 910 | struct request *rq); |
0abc2a10 | 911 | extern int blk_rq_append_bio(struct request *rq, struct bio **bio); |
f695ca38 | 912 | extern void blk_queue_split(struct bio **); |
0bfc96cb | 913 | extern int scsi_verify_blk_ioctl(struct block_device *, unsigned int); |
577ebb37 PB |
914 | extern int scsi_cmd_blk_ioctl(struct block_device *, fmode_t, |
915 | unsigned int, void __user *); | |
74f3c8af AV |
916 | extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t, |
917 | unsigned int, void __user *); | |
e915e872 AV |
918 | extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t, |
919 | struct scsi_ioctl_command __user *); | |
98aaaec4 AB |
920 | extern int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp); |
921 | extern int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp); | |
3fcfab16 | 922 | |
9a95e4ef | 923 | extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags); |
2e6edc95 | 924 | extern void blk_queue_exit(struct request_queue *q); |
1da177e4 | 925 | extern void blk_sync_queue(struct request_queue *q); |
a3bce90e | 926 | extern int blk_rq_map_user(struct request_queue *, struct request *, |
152e283f FT |
927 | struct rq_map_data *, void __user *, unsigned long, |
928 | gfp_t); | |
8e5cfc45 | 929 | extern int blk_rq_unmap_user(struct bio *); |
165125e1 JA |
930 | extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t); |
931 | extern int blk_rq_map_user_iov(struct request_queue *, struct request *, | |
26e49cfc KO |
932 | struct rq_map_data *, const struct iov_iter *, |
933 | gfp_t); | |
b7819b92 | 934 | extern void blk_execute_rq(struct request_queue *, struct gendisk *, |
994ca9a1 | 935 | struct request *, int); |
165125e1 | 936 | extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, |
15fc858a | 937 | struct request *, int, rq_end_io_fn *); |
6e39b69e | 938 | |
e47bc4ed CK |
939 | /* Helper to convert REQ_OP_XXX to its string format XXX */ |
940 | extern const char *blk_op_str(unsigned int op); | |
941 | ||
2a842aca CH |
942 | int blk_status_to_errno(blk_status_t status); |
943 | blk_status_t errno_to_blk_status(int errno); | |
944 | ||
0a1b8b87 | 945 | int blk_poll(struct request_queue *q, blk_qc_t cookie, bool spin); |
05229bee | 946 | |
165125e1 | 947 | static inline struct request_queue *bdev_get_queue(struct block_device *bdev) |
1da177e4 | 948 | { |
ff9ea323 | 949 | return bdev->bd_disk->queue; /* this is never NULL */ |
1da177e4 LT |
950 | } |
951 | ||
233bde21 BVA |
952 | /* |
953 | * The basic unit of block I/O is a sector. It is used in a number of contexts | |
954 | * in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9 | |
955 | * bytes. Variables of type sector_t represent an offset or size that is a | |
956 | * multiple of 512 bytes. Hence these two constants. | |
957 | */ | |
958 | #ifndef SECTOR_SHIFT | |
959 | #define SECTOR_SHIFT 9 | |
960 | #endif | |
961 | #ifndef SECTOR_SIZE | |
962 | #define SECTOR_SIZE (1 << SECTOR_SHIFT) | |
963 | #endif | |
964 | ||
5efccd17 | 965 | /* |
80a761fd TH |
966 | * blk_rq_pos() : the current sector |
967 | * blk_rq_bytes() : bytes left in the entire request | |
968 | * blk_rq_cur_bytes() : bytes left in the current segment | |
969 | * blk_rq_err_bytes() : bytes left till the next error boundary | |
970 | * blk_rq_sectors() : sectors left in the entire request | |
971 | * blk_rq_cur_sectors() : sectors left in the current segment | |
3d244306 | 972 | * blk_rq_stats_sectors() : sectors of the entire request used for stats |
5efccd17 | 973 | */ |
5b93629b TH |
974 | static inline sector_t blk_rq_pos(const struct request *rq) |
975 | { | |
a2dec7b3 | 976 | return rq->__sector; |
2e46e8b2 TH |
977 | } |
978 | ||
979 | static inline unsigned int blk_rq_bytes(const struct request *rq) | |
980 | { | |
a2dec7b3 | 981 | return rq->__data_len; |
5b93629b TH |
982 | } |
983 | ||
2e46e8b2 TH |
984 | static inline int blk_rq_cur_bytes(const struct request *rq) |
985 | { | |
986 | return rq->bio ? bio_cur_bytes(rq->bio) : 0; | |
987 | } | |
5efccd17 | 988 | |
80a761fd TH |
989 | extern unsigned int blk_rq_err_bytes(const struct request *rq); |
990 | ||
5b93629b TH |
991 | static inline unsigned int blk_rq_sectors(const struct request *rq) |
992 | { | |
233bde21 | 993 | return blk_rq_bytes(rq) >> SECTOR_SHIFT; |
5b93629b TH |
994 | } |
995 | ||
996 | static inline unsigned int blk_rq_cur_sectors(const struct request *rq) | |
997 | { | |
233bde21 | 998 | return blk_rq_cur_bytes(rq) >> SECTOR_SHIFT; |
5b93629b TH |
999 | } |
1000 | ||
3d244306 HT |
1001 | static inline unsigned int blk_rq_stats_sectors(const struct request *rq) |
1002 | { | |
1003 | return rq->stats_sectors; | |
1004 | } | |
1005 | ||
6a5ac984 | 1006 | #ifdef CONFIG_BLK_DEV_ZONED |
02694e86 CK |
1007 | |
1008 | /* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */ | |
1009 | const char *blk_zone_cond_str(enum blk_zone_cond zone_cond); | |
1010 | ||
6cc77e9c CH |
1011 | static inline unsigned int blk_rq_zone_no(struct request *rq) |
1012 | { | |
1013 | return blk_queue_zone_no(rq->q, blk_rq_pos(rq)); | |
1014 | } | |
1015 | ||
1016 | static inline unsigned int blk_rq_zone_is_seq(struct request *rq) | |
1017 | { | |
1018 | return blk_queue_zone_is_seq(rq->q, blk_rq_pos(rq)); | |
1019 | } | |
6a5ac984 | 1020 | #endif /* CONFIG_BLK_DEV_ZONED */ |
6cc77e9c | 1021 | |
2e3258ec CH |
1022 | /* |
1023 | * Some commands like WRITE SAME have a payload or data transfer size which | |
1024 | * is different from the size of the request. Any driver that supports such | |
1025 | * commands using the RQF_SPECIAL_PAYLOAD flag needs to use this helper to | |
1026 | * calculate the data transfer size. | |
1027 | */ | |
1028 | static inline unsigned int blk_rq_payload_bytes(struct request *rq) | |
1029 | { | |
1030 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) | |
1031 | return rq->special_vec.bv_len; | |
1032 | return blk_rq_bytes(rq); | |
1033 | } | |
1034 | ||
3aef3cae CH |
1035 | /* |
1036 | * Return the first full biovec in the request. The caller needs to check that | |
1037 | * there are any bvecs before calling this helper. | |
1038 | */ | |
1039 | static inline struct bio_vec req_bvec(struct request *rq) | |
1040 | { | |
1041 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) | |
1042 | return rq->special_vec; | |
1043 | return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter); | |
1044 | } | |
1045 | ||
f31dc1cd | 1046 | static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q, |
8fe0d473 | 1047 | int op) |
f31dc1cd | 1048 | { |
7afafc8a | 1049 | if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE)) |
233bde21 BVA |
1050 | return min(q->limits.max_discard_sectors, |
1051 | UINT_MAX >> SECTOR_SHIFT); | |
f31dc1cd | 1052 | |
8fe0d473 | 1053 | if (unlikely(op == REQ_OP_WRITE_SAME)) |
4363ac7c MP |
1054 | return q->limits.max_write_same_sectors; |
1055 | ||
a6f0788e CK |
1056 | if (unlikely(op == REQ_OP_WRITE_ZEROES)) |
1057 | return q->limits.max_write_zeroes_sectors; | |
1058 | ||
f31dc1cd MP |
1059 | return q->limits.max_sectors; |
1060 | } | |
1061 | ||
762380ad JA |
1062 | /* |
1063 | * Return maximum size of a request at given offset. Only valid for | |
1064 | * file system requests. | |
1065 | */ | |
1066 | static inline unsigned int blk_max_size_offset(struct request_queue *q, | |
1067 | sector_t offset) | |
1068 | { | |
07d098e6 MS |
1069 | unsigned int chunk_sectors = q->limits.chunk_sectors; |
1070 | ||
1071 | if (!chunk_sectors) | |
736ed4de | 1072 | return q->limits.max_sectors; |
762380ad | 1073 | |
07d098e6 MS |
1074 | if (likely(is_power_of_2(chunk_sectors))) |
1075 | chunk_sectors -= offset & (chunk_sectors - 1); | |
1076 | else | |
1077 | chunk_sectors -= sector_div(offset, chunk_sectors); | |
1078 | ||
1079 | return min(q->limits.max_sectors, chunk_sectors); | |
762380ad JA |
1080 | } |
1081 | ||
17007f39 DLM |
1082 | static inline unsigned int blk_rq_get_max_sectors(struct request *rq, |
1083 | sector_t offset) | |
f31dc1cd MP |
1084 | { |
1085 | struct request_queue *q = rq->q; | |
1086 | ||
57292b58 | 1087 | if (blk_rq_is_passthrough(rq)) |
f31dc1cd MP |
1088 | return q->limits.max_hw_sectors; |
1089 | ||
7afafc8a AH |
1090 | if (!q->limits.chunk_sectors || |
1091 | req_op(rq) == REQ_OP_DISCARD || | |
1092 | req_op(rq) == REQ_OP_SECURE_ERASE) | |
8fe0d473 | 1093 | return blk_queue_get_max_sectors(q, req_op(rq)); |
762380ad | 1094 | |
17007f39 | 1095 | return min(blk_max_size_offset(q, offset), |
8fe0d473 | 1096 | blk_queue_get_max_sectors(q, req_op(rq))); |
f31dc1cd MP |
1097 | } |
1098 | ||
75afb352 JN |
1099 | static inline unsigned int blk_rq_count_bios(struct request *rq) |
1100 | { | |
1101 | unsigned int nr_bios = 0; | |
1102 | struct bio *bio; | |
1103 | ||
1104 | __rq_for_each_bio(bio, rq) | |
1105 | nr_bios++; | |
1106 | ||
1107 | return nr_bios; | |
1108 | } | |
1109 | ||
ef71de8b CH |
1110 | void blk_steal_bios(struct bio_list *list, struct request *rq); |
1111 | ||
1da177e4 | 1112 | /* |
2e60e022 TH |
1113 | * Request completion related functions. |
1114 | * | |
1115 | * blk_update_request() completes given number of bytes and updates | |
1116 | * the request without completing it. | |
1da177e4 | 1117 | */ |
2a842aca | 1118 | extern bool blk_update_request(struct request *rq, blk_status_t error, |
2e60e022 | 1119 | unsigned int nr_bytes); |
2e60e022 | 1120 | |
242f9dcb | 1121 | extern void blk_abort_request(struct request *); |
ff856bad | 1122 | |
1da177e4 LT |
1123 | /* |
1124 | * Access functions for manipulating queue properties | |
1125 | */ | |
165125e1 | 1126 | extern void blk_cleanup_queue(struct request_queue *); |
165125e1 | 1127 | extern void blk_queue_bounce_limit(struct request_queue *, u64); |
086fa5ff | 1128 | extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int); |
762380ad | 1129 | extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int); |
8a78362c | 1130 | extern void blk_queue_max_segments(struct request_queue *, unsigned short); |
1e739730 CH |
1131 | extern void blk_queue_max_discard_segments(struct request_queue *, |
1132 | unsigned short); | |
165125e1 | 1133 | extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); |
67efc925 CH |
1134 | extern void blk_queue_max_discard_sectors(struct request_queue *q, |
1135 | unsigned int max_discard_sectors); | |
4363ac7c MP |
1136 | extern void blk_queue_max_write_same_sectors(struct request_queue *q, |
1137 | unsigned int max_write_same_sectors); | |
a6f0788e CK |
1138 | extern void blk_queue_max_write_zeroes_sectors(struct request_queue *q, |
1139 | unsigned int max_write_same_sectors); | |
ad6bf88a | 1140 | extern void blk_queue_logical_block_size(struct request_queue *, unsigned int); |
0512a75b KB |
1141 | extern void blk_queue_max_zone_append_sectors(struct request_queue *q, |
1142 | unsigned int max_zone_append_sectors); | |
892b6f90 | 1143 | extern void blk_queue_physical_block_size(struct request_queue *, unsigned int); |
c72758f3 MP |
1144 | extern void blk_queue_alignment_offset(struct request_queue *q, |
1145 | unsigned int alignment); | |
c2e4cd57 | 1146 | void blk_queue_update_readahead(struct request_queue *q); |
7c958e32 | 1147 | extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min); |
c72758f3 | 1148 | extern void blk_queue_io_min(struct request_queue *q, unsigned int min); |
3c5820c7 | 1149 | extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt); |
c72758f3 | 1150 | extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt); |
d278d4a8 | 1151 | extern void blk_set_queue_depth(struct request_queue *q, unsigned int depth); |
e475bba2 | 1152 | extern void blk_set_default_limits(struct queue_limits *lim); |
b1bd055d | 1153 | extern void blk_set_stacking_limits(struct queue_limits *lim); |
c72758f3 MP |
1154 | extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, |
1155 | sector_t offset); | |
1156 | extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, | |
1157 | sector_t offset); | |
27f8221a | 1158 | extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int); |
165125e1 | 1159 | extern void blk_queue_segment_boundary(struct request_queue *, unsigned long); |
03100aad | 1160 | extern void blk_queue_virt_boundary(struct request_queue *, unsigned long); |
165125e1 | 1161 | extern void blk_queue_dma_alignment(struct request_queue *, int); |
11c3e689 | 1162 | extern void blk_queue_update_dma_alignment(struct request_queue *, int); |
242f9dcb | 1163 | extern void blk_queue_rq_timeout(struct request_queue *, unsigned int); |
93e9d8e8 | 1164 | extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua); |
68c43f13 DLM |
1165 | extern void blk_queue_required_elevator_features(struct request_queue *q, |
1166 | unsigned int features); | |
45147fb5 YS |
1167 | extern bool blk_queue_can_use_dma_map_merging(struct request_queue *q, |
1168 | struct device *dev); | |
1da177e4 | 1169 | |
1e739730 CH |
1170 | /* |
1171 | * Number of physical segments as sent to the device. | |
1172 | * | |
1173 | * Normally this is the number of discontiguous data segments sent by the | |
1174 | * submitter. But for data-less command like discard we might have no | |
1175 | * actual data segments submitted, but the driver might have to add it's | |
1176 | * own special payload. In that case we still return 1 here so that this | |
1177 | * special payload will be mapped. | |
1178 | */ | |
f9d03f96 CH |
1179 | static inline unsigned short blk_rq_nr_phys_segments(struct request *rq) |
1180 | { | |
1181 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) | |
1182 | return 1; | |
1183 | return rq->nr_phys_segments; | |
1184 | } | |
1185 | ||
1e739730 CH |
1186 | /* |
1187 | * Number of discard segments (or ranges) the driver needs to fill in. | |
1188 | * Each discard bio merged into a request is counted as one segment. | |
1189 | */ | |
1190 | static inline unsigned short blk_rq_nr_discard_segments(struct request *rq) | |
1191 | { | |
1192 | return max_t(unsigned short, rq->nr_phys_segments, 1); | |
1193 | } | |
1194 | ||
89de1504 CH |
1195 | int __blk_rq_map_sg(struct request_queue *q, struct request *rq, |
1196 | struct scatterlist *sglist, struct scatterlist **last_sg); | |
1197 | static inline int blk_rq_map_sg(struct request_queue *q, struct request *rq, | |
1198 | struct scatterlist *sglist) | |
1199 | { | |
1200 | struct scatterlist *last_sg = NULL; | |
1201 | ||
1202 | return __blk_rq_map_sg(q, rq, sglist, &last_sg); | |
1203 | } | |
1da177e4 | 1204 | extern void blk_dump_rq_flags(struct request *, char *); |
1da177e4 | 1205 | |
09ac46c4 | 1206 | bool __must_check blk_get_queue(struct request_queue *); |
c62b37d9 | 1207 | struct request_queue *blk_alloc_queue(int node_id); |
165125e1 | 1208 | extern void blk_put_queue(struct request_queue *); |
3f21c265 | 1209 | extern void blk_set_queue_dying(struct request_queue *); |
1da177e4 | 1210 | |
1a4dcfa8 | 1211 | #ifdef CONFIG_BLOCK |
316cc67d | 1212 | /* |
75df7136 SJ |
1213 | * blk_plug permits building a queue of related requests by holding the I/O |
1214 | * fragments for a short period. This allows merging of sequential requests | |
1215 | * into single larger request. As the requests are moved from a per-task list to | |
1216 | * the device's request_queue in a batch, this results in improved scalability | |
1217 | * as the lock contention for request_queue lock is reduced. | |
1218 | * | |
1219 | * It is ok not to disable preemption when adding the request to the plug list | |
1220 | * or when attempting a merge, because blk_schedule_flush_list() will only flush | |
1221 | * the plug list when the task sleeps by itself. For details, please see | |
1222 | * schedule() where blk_schedule_flush_plug() is called. | |
316cc67d | 1223 | */ |
73c10101 | 1224 | struct blk_plug { |
320ae51f | 1225 | struct list_head mq_list; /* blk-mq requests */ |
75df7136 | 1226 | struct list_head cb_list; /* md requires an unplug callback */ |
5f0ed774 | 1227 | unsigned short rq_count; |
ce5b009c | 1228 | bool multiple_queues; |
5a473e83 | 1229 | bool nowait; |
73c10101 | 1230 | }; |
55c022bb | 1231 | #define BLK_MAX_REQUEST_COUNT 16 |
50d24c34 | 1232 | #define BLK_PLUG_FLUSH_SIZE (128 * 1024) |
55c022bb | 1233 | |
9cbb1750 | 1234 | struct blk_plug_cb; |
74018dc3 | 1235 | typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool); |
048c9374 N |
1236 | struct blk_plug_cb { |
1237 | struct list_head list; | |
9cbb1750 N |
1238 | blk_plug_cb_fn callback; |
1239 | void *data; | |
048c9374 | 1240 | }; |
9cbb1750 N |
1241 | extern struct blk_plug_cb *blk_check_plugged(blk_plug_cb_fn unplug, |
1242 | void *data, int size); | |
73c10101 JA |
1243 | extern void blk_start_plug(struct blk_plug *); |
1244 | extern void blk_finish_plug(struct blk_plug *); | |
f6603783 | 1245 | extern void blk_flush_plug_list(struct blk_plug *, bool); |
73c10101 JA |
1246 | |
1247 | static inline void blk_flush_plug(struct task_struct *tsk) | |
1248 | { | |
1249 | struct blk_plug *plug = tsk->plug; | |
1250 | ||
a237c1c5 JA |
1251 | if (plug) |
1252 | blk_flush_plug_list(plug, false); | |
1253 | } | |
1254 | ||
1255 | static inline void blk_schedule_flush_plug(struct task_struct *tsk) | |
1256 | { | |
1257 | struct blk_plug *plug = tsk->plug; | |
1258 | ||
88b996cd | 1259 | if (plug) |
f6603783 | 1260 | blk_flush_plug_list(plug, true); |
73c10101 JA |
1261 | } |
1262 | ||
1263 | static inline bool blk_needs_flush_plug(struct task_struct *tsk) | |
1264 | { | |
1265 | struct blk_plug *plug = tsk->plug; | |
1266 | ||
320ae51f | 1267 | return plug && |
a1ce35fa | 1268 | (!list_empty(&plug->mq_list) || |
320ae51f | 1269 | !list_empty(&plug->cb_list)); |
73c10101 JA |
1270 | } |
1271 | ||
1a4dcfa8 CH |
1272 | int blkdev_issue_flush(struct block_device *, gfp_t); |
1273 | long nr_blockdev_pages(void); | |
1274 | #else /* CONFIG_BLOCK */ | |
1275 | struct blk_plug { | |
1276 | }; | |
1277 | ||
1278 | static inline void blk_start_plug(struct blk_plug *plug) | |
1279 | { | |
1280 | } | |
1281 | ||
1282 | static inline void blk_finish_plug(struct blk_plug *plug) | |
1283 | { | |
1284 | } | |
1285 | ||
1286 | static inline void blk_flush_plug(struct task_struct *task) | |
1287 | { | |
1288 | } | |
1289 | ||
1290 | static inline void blk_schedule_flush_plug(struct task_struct *task) | |
1291 | { | |
1292 | } | |
1293 | ||
1294 | ||
1295 | static inline bool blk_needs_flush_plug(struct task_struct *tsk) | |
1296 | { | |
1297 | return false; | |
1298 | } | |
1299 | ||
1300 | static inline int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask) | |
1301 | { | |
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | static inline long nr_blockdev_pages(void) | |
1306 | { | |
1307 | return 0; | |
1308 | } | |
1309 | #endif /* CONFIG_BLOCK */ | |
1310 | ||
71ac860a ML |
1311 | extern void blk_io_schedule(void); |
1312 | ||
ee472d83 CH |
1313 | extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector, |
1314 | sector_t nr_sects, gfp_t gfp_mask, struct page *page); | |
e950fdf7 CH |
1315 | |
1316 | #define BLKDEV_DISCARD_SECURE (1 << 0) /* issue a secure erase */ | |
dd3932ed | 1317 | |
fbd9b09a DM |
1318 | extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector, |
1319 | sector_t nr_sects, gfp_t gfp_mask, unsigned long flags); | |
38f25255 | 1320 | extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, |
288dab8a | 1321 | sector_t nr_sects, gfp_t gfp_mask, int flags, |
469e3216 | 1322 | struct bio **biop); |
ee472d83 CH |
1323 | |
1324 | #define BLKDEV_ZERO_NOUNMAP (1 << 0) /* do not free blocks */ | |
cb365b96 | 1325 | #define BLKDEV_ZERO_NOFALLBACK (1 << 1) /* don't write explicit zeroes */ |
ee472d83 | 1326 | |
e73c23ff CK |
1327 | extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, |
1328 | sector_t nr_sects, gfp_t gfp_mask, struct bio **biop, | |
ee472d83 | 1329 | unsigned flags); |
3f14d792 | 1330 | extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, |
ee472d83 CH |
1331 | sector_t nr_sects, gfp_t gfp_mask, unsigned flags); |
1332 | ||
2cf6d26a CH |
1333 | static inline int sb_issue_discard(struct super_block *sb, sector_t block, |
1334 | sector_t nr_blocks, gfp_t gfp_mask, unsigned long flags) | |
fb2dce86 | 1335 | { |
233bde21 BVA |
1336 | return blkdev_issue_discard(sb->s_bdev, |
1337 | block << (sb->s_blocksize_bits - | |
1338 | SECTOR_SHIFT), | |
1339 | nr_blocks << (sb->s_blocksize_bits - | |
1340 | SECTOR_SHIFT), | |
2cf6d26a | 1341 | gfp_mask, flags); |
fb2dce86 | 1342 | } |
e6fa0be6 | 1343 | static inline int sb_issue_zeroout(struct super_block *sb, sector_t block, |
a107e5a3 | 1344 | sector_t nr_blocks, gfp_t gfp_mask) |
e6fa0be6 LC |
1345 | { |
1346 | return blkdev_issue_zeroout(sb->s_bdev, | |
233bde21 BVA |
1347 | block << (sb->s_blocksize_bits - |
1348 | SECTOR_SHIFT), | |
1349 | nr_blocks << (sb->s_blocksize_bits - | |
1350 | SECTOR_SHIFT), | |
ee472d83 | 1351 | gfp_mask, 0); |
e6fa0be6 | 1352 | } |
1da177e4 | 1353 | |
f00c4d80 | 1354 | extern int blk_verify_command(unsigned char *cmd, fmode_t mode); |
0b07de85 | 1355 | |
eb28d31b MP |
1356 | enum blk_default_limits { |
1357 | BLK_MAX_SEGMENTS = 128, | |
1358 | BLK_SAFE_MAX_SECTORS = 255, | |
d2be537c | 1359 | BLK_DEF_MAX_SECTORS = 2560, |
eb28d31b MP |
1360 | BLK_MAX_SEGMENT_SIZE = 65536, |
1361 | BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL, | |
1362 | }; | |
0e435ac2 | 1363 | |
af2c68fe | 1364 | static inline unsigned long queue_segment_boundary(const struct request_queue *q) |
ae03bf63 | 1365 | { |
025146e1 | 1366 | return q->limits.seg_boundary_mask; |
ae03bf63 MP |
1367 | } |
1368 | ||
af2c68fe | 1369 | static inline unsigned long queue_virt_boundary(const struct request_queue *q) |
03100aad KB |
1370 | { |
1371 | return q->limits.virt_boundary_mask; | |
1372 | } | |
1373 | ||
af2c68fe | 1374 | static inline unsigned int queue_max_sectors(const struct request_queue *q) |
ae03bf63 | 1375 | { |
025146e1 | 1376 | return q->limits.max_sectors; |
ae03bf63 MP |
1377 | } |
1378 | ||
af2c68fe | 1379 | static inline unsigned int queue_max_hw_sectors(const struct request_queue *q) |
ae03bf63 | 1380 | { |
025146e1 | 1381 | return q->limits.max_hw_sectors; |
ae03bf63 MP |
1382 | } |
1383 | ||
af2c68fe | 1384 | static inline unsigned short queue_max_segments(const struct request_queue *q) |
ae03bf63 | 1385 | { |
8a78362c | 1386 | return q->limits.max_segments; |
ae03bf63 MP |
1387 | } |
1388 | ||
af2c68fe | 1389 | static inline unsigned short queue_max_discard_segments(const struct request_queue *q) |
1e739730 CH |
1390 | { |
1391 | return q->limits.max_discard_segments; | |
1392 | } | |
1393 | ||
af2c68fe | 1394 | static inline unsigned int queue_max_segment_size(const struct request_queue *q) |
ae03bf63 | 1395 | { |
025146e1 | 1396 | return q->limits.max_segment_size; |
ae03bf63 MP |
1397 | } |
1398 | ||
0512a75b KB |
1399 | static inline unsigned int queue_max_zone_append_sectors(const struct request_queue *q) |
1400 | { | |
1401 | return q->limits.max_zone_append_sectors; | |
1402 | } | |
1403 | ||
ad6bf88a | 1404 | static inline unsigned queue_logical_block_size(const struct request_queue *q) |
1da177e4 LT |
1405 | { |
1406 | int retval = 512; | |
1407 | ||
025146e1 MP |
1408 | if (q && q->limits.logical_block_size) |
1409 | retval = q->limits.logical_block_size; | |
1da177e4 LT |
1410 | |
1411 | return retval; | |
1412 | } | |
1413 | ||
ad6bf88a | 1414 | static inline unsigned int bdev_logical_block_size(struct block_device *bdev) |
1da177e4 | 1415 | { |
e1defc4f | 1416 | return queue_logical_block_size(bdev_get_queue(bdev)); |
1da177e4 LT |
1417 | } |
1418 | ||
af2c68fe | 1419 | static inline unsigned int queue_physical_block_size(const struct request_queue *q) |
c72758f3 MP |
1420 | { |
1421 | return q->limits.physical_block_size; | |
1422 | } | |
1423 | ||
892b6f90 | 1424 | static inline unsigned int bdev_physical_block_size(struct block_device *bdev) |
ac481c20 MP |
1425 | { |
1426 | return queue_physical_block_size(bdev_get_queue(bdev)); | |
1427 | } | |
1428 | ||
af2c68fe | 1429 | static inline unsigned int queue_io_min(const struct request_queue *q) |
c72758f3 MP |
1430 | { |
1431 | return q->limits.io_min; | |
1432 | } | |
1433 | ||
ac481c20 MP |
1434 | static inline int bdev_io_min(struct block_device *bdev) |
1435 | { | |
1436 | return queue_io_min(bdev_get_queue(bdev)); | |
1437 | } | |
1438 | ||
af2c68fe | 1439 | static inline unsigned int queue_io_opt(const struct request_queue *q) |
c72758f3 MP |
1440 | { |
1441 | return q->limits.io_opt; | |
1442 | } | |
1443 | ||
ac481c20 MP |
1444 | static inline int bdev_io_opt(struct block_device *bdev) |
1445 | { | |
1446 | return queue_io_opt(bdev_get_queue(bdev)); | |
1447 | } | |
1448 | ||
af2c68fe | 1449 | static inline int queue_alignment_offset(const struct request_queue *q) |
c72758f3 | 1450 | { |
ac481c20 | 1451 | if (q->limits.misaligned) |
c72758f3 MP |
1452 | return -1; |
1453 | ||
ac481c20 | 1454 | return q->limits.alignment_offset; |
c72758f3 MP |
1455 | } |
1456 | ||
e03a72e1 | 1457 | static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t sector) |
81744ee4 MP |
1458 | { |
1459 | unsigned int granularity = max(lim->physical_block_size, lim->io_min); | |
233bde21 BVA |
1460 | unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT) |
1461 | << SECTOR_SHIFT; | |
81744ee4 | 1462 | |
b8839b8c | 1463 | return (granularity + lim->alignment_offset - alignment) % granularity; |
c72758f3 MP |
1464 | } |
1465 | ||
ac481c20 MP |
1466 | static inline int bdev_alignment_offset(struct block_device *bdev) |
1467 | { | |
1468 | struct request_queue *q = bdev_get_queue(bdev); | |
1469 | ||
1470 | if (q->limits.misaligned) | |
1471 | return -1; | |
ac481c20 | 1472 | if (bdev != bdev->bd_contains) |
7b8917f5 CH |
1473 | return queue_limit_alignment_offset(&q->limits, |
1474 | bdev->bd_part->start_sect); | |
ac481c20 MP |
1475 | return q->limits.alignment_offset; |
1476 | } | |
1477 | ||
af2c68fe | 1478 | static inline int queue_discard_alignment(const struct request_queue *q) |
86b37281 MP |
1479 | { |
1480 | if (q->limits.discard_misaligned) | |
1481 | return -1; | |
1482 | ||
1483 | return q->limits.discard_alignment; | |
1484 | } | |
1485 | ||
e03a72e1 | 1486 | static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector) |
86b37281 | 1487 | { |
59771079 | 1488 | unsigned int alignment, granularity, offset; |
dd3d145d | 1489 | |
a934a00a MP |
1490 | if (!lim->max_discard_sectors) |
1491 | return 0; | |
1492 | ||
59771079 | 1493 | /* Why are these in bytes, not sectors? */ |
233bde21 BVA |
1494 | alignment = lim->discard_alignment >> SECTOR_SHIFT; |
1495 | granularity = lim->discard_granularity >> SECTOR_SHIFT; | |
59771079 LT |
1496 | if (!granularity) |
1497 | return 0; | |
1498 | ||
1499 | /* Offset of the partition start in 'granularity' sectors */ | |
1500 | offset = sector_div(sector, granularity); | |
1501 | ||
1502 | /* And why do we do this modulus *again* in blkdev_issue_discard()? */ | |
1503 | offset = (granularity + alignment - offset) % granularity; | |
1504 | ||
1505 | /* Turn it back into bytes, gaah */ | |
233bde21 | 1506 | return offset << SECTOR_SHIFT; |
86b37281 MP |
1507 | } |
1508 | ||
c6e66634 PB |
1509 | static inline int bdev_discard_alignment(struct block_device *bdev) |
1510 | { | |
1511 | struct request_queue *q = bdev_get_queue(bdev); | |
1512 | ||
1513 | if (bdev != bdev->bd_contains) | |
7cf34d97 CH |
1514 | return queue_limit_discard_alignment(&q->limits, |
1515 | bdev->bd_part->start_sect); | |
c6e66634 PB |
1516 | return q->limits.discard_alignment; |
1517 | } | |
1518 | ||
4363ac7c MP |
1519 | static inline unsigned int bdev_write_same(struct block_device *bdev) |
1520 | { | |
1521 | struct request_queue *q = bdev_get_queue(bdev); | |
1522 | ||
1523 | if (q) | |
1524 | return q->limits.max_write_same_sectors; | |
1525 | ||
1526 | return 0; | |
1527 | } | |
1528 | ||
a6f0788e CK |
1529 | static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev) |
1530 | { | |
1531 | struct request_queue *q = bdev_get_queue(bdev); | |
1532 | ||
1533 | if (q) | |
1534 | return q->limits.max_write_zeroes_sectors; | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
797476b8 DLM |
1539 | static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev) |
1540 | { | |
1541 | struct request_queue *q = bdev_get_queue(bdev); | |
1542 | ||
1543 | if (q) | |
1544 | return blk_queue_zoned_model(q); | |
1545 | ||
1546 | return BLK_ZONED_NONE; | |
1547 | } | |
1548 | ||
1549 | static inline bool bdev_is_zoned(struct block_device *bdev) | |
1550 | { | |
1551 | struct request_queue *q = bdev_get_queue(bdev); | |
1552 | ||
1553 | if (q) | |
1554 | return blk_queue_is_zoned(q); | |
1555 | ||
1556 | return false; | |
1557 | } | |
1558 | ||
113ab72e | 1559 | static inline sector_t bdev_zone_sectors(struct block_device *bdev) |
6a0cb1bc HR |
1560 | { |
1561 | struct request_queue *q = bdev_get_queue(bdev); | |
1562 | ||
1563 | if (q) | |
f99e8648 | 1564 | return blk_queue_zone_sectors(q); |
6cc77e9c CH |
1565 | return 0; |
1566 | } | |
6a0cb1bc | 1567 | |
e15864f8 NC |
1568 | static inline unsigned int bdev_max_open_zones(struct block_device *bdev) |
1569 | { | |
1570 | struct request_queue *q = bdev_get_queue(bdev); | |
1571 | ||
1572 | if (q) | |
1573 | return queue_max_open_zones(q); | |
1574 | return 0; | |
1575 | } | |
1576 | ||
659bf827 NC |
1577 | static inline unsigned int bdev_max_active_zones(struct block_device *bdev) |
1578 | { | |
1579 | struct request_queue *q = bdev_get_queue(bdev); | |
1580 | ||
1581 | if (q) | |
1582 | return queue_max_active_zones(q); | |
1583 | return 0; | |
1584 | } | |
1585 | ||
af2c68fe | 1586 | static inline int queue_dma_alignment(const struct request_queue *q) |
1da177e4 | 1587 | { |
482eb689 | 1588 | return q ? q->dma_alignment : 511; |
1da177e4 LT |
1589 | } |
1590 | ||
14417799 | 1591 | static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr, |
87904074 FT |
1592 | unsigned int len) |
1593 | { | |
1594 | unsigned int alignment = queue_dma_alignment(q) | q->dma_pad_mask; | |
14417799 | 1595 | return !(addr & alignment) && !(len & alignment); |
87904074 FT |
1596 | } |
1597 | ||
1da177e4 LT |
1598 | /* assumes size > 256 */ |
1599 | static inline unsigned int blksize_bits(unsigned int size) | |
1600 | { | |
1601 | unsigned int bits = 8; | |
1602 | do { | |
1603 | bits++; | |
1604 | size >>= 1; | |
1605 | } while (size > 256); | |
1606 | return bits; | |
1607 | } | |
1608 | ||
2befb9e3 | 1609 | static inline unsigned int block_size(struct block_device *bdev) |
1da177e4 | 1610 | { |
6b7b181b | 1611 | return 1 << bdev->bd_inode->i_blkbits; |
1da177e4 LT |
1612 | } |
1613 | ||
59c3d45e | 1614 | int kblockd_schedule_work(struct work_struct *work); |
818cd1cb | 1615 | int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay); |
1da177e4 | 1616 | |
1da177e4 LT |
1617 | #define MODULE_ALIAS_BLOCKDEV(major,minor) \ |
1618 | MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor)) | |
1619 | #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \ | |
1620 | MODULE_ALIAS("block-major-" __stringify(major) "-*") | |
1621 | ||
7ba1ba12 MP |
1622 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
1623 | ||
8288f496 MP |
1624 | enum blk_integrity_flags { |
1625 | BLK_INTEGRITY_VERIFY = 1 << 0, | |
1626 | BLK_INTEGRITY_GENERATE = 1 << 1, | |
3aec2f41 | 1627 | BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2, |
aae7df50 | 1628 | BLK_INTEGRITY_IP_CHECKSUM = 1 << 3, |
8288f496 | 1629 | }; |
7ba1ba12 | 1630 | |
18593088 | 1631 | struct blk_integrity_iter { |
7ba1ba12 MP |
1632 | void *prot_buf; |
1633 | void *data_buf; | |
3be91c4a | 1634 | sector_t seed; |
7ba1ba12 | 1635 | unsigned int data_size; |
3be91c4a | 1636 | unsigned short interval; |
7ba1ba12 MP |
1637 | const char *disk_name; |
1638 | }; | |
1639 | ||
4e4cbee9 | 1640 | typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *); |
54d4e6ab MG |
1641 | typedef void (integrity_prepare_fn) (struct request *); |
1642 | typedef void (integrity_complete_fn) (struct request *, unsigned int); | |
7ba1ba12 | 1643 | |
0f8087ec MP |
1644 | struct blk_integrity_profile { |
1645 | integrity_processing_fn *generate_fn; | |
1646 | integrity_processing_fn *verify_fn; | |
54d4e6ab MG |
1647 | integrity_prepare_fn *prepare_fn; |
1648 | integrity_complete_fn *complete_fn; | |
0f8087ec MP |
1649 | const char *name; |
1650 | }; | |
7ba1ba12 | 1651 | |
25520d55 | 1652 | extern void blk_integrity_register(struct gendisk *, struct blk_integrity *); |
7ba1ba12 | 1653 | extern void blk_integrity_unregister(struct gendisk *); |
ad7fce93 | 1654 | extern int blk_integrity_compare(struct gendisk *, struct gendisk *); |
13f05c8d MP |
1655 | extern int blk_rq_map_integrity_sg(struct request_queue *, struct bio *, |
1656 | struct scatterlist *); | |
1657 | extern int blk_rq_count_integrity_sg(struct request_queue *, struct bio *); | |
4eaf99be MP |
1658 | extern bool blk_integrity_merge_rq(struct request_queue *, struct request *, |
1659 | struct request *); | |
1660 | extern bool blk_integrity_merge_bio(struct request_queue *, struct request *, | |
1661 | struct bio *); | |
7ba1ba12 | 1662 | |
25520d55 | 1663 | static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk) |
b04accc4 | 1664 | { |
ac6fc48c | 1665 | struct blk_integrity *bi = &disk->queue->integrity; |
25520d55 MP |
1666 | |
1667 | if (!bi->profile) | |
1668 | return NULL; | |
1669 | ||
1670 | return bi; | |
b04accc4 JA |
1671 | } |
1672 | ||
25520d55 MP |
1673 | static inline |
1674 | struct blk_integrity *bdev_get_integrity(struct block_device *bdev) | |
b02739b0 | 1675 | { |
25520d55 | 1676 | return blk_get_integrity(bdev->bd_disk); |
b02739b0 MP |
1677 | } |
1678 | ||
d145dc23 ST |
1679 | static inline bool |
1680 | blk_integrity_queue_supports_integrity(struct request_queue *q) | |
1681 | { | |
1682 | return q->integrity.profile; | |
1683 | } | |
1684 | ||
180b2f95 | 1685 | static inline bool blk_integrity_rq(struct request *rq) |
7ba1ba12 | 1686 | { |
180b2f95 | 1687 | return rq->cmd_flags & REQ_INTEGRITY; |
7ba1ba12 MP |
1688 | } |
1689 | ||
13f05c8d MP |
1690 | static inline void blk_queue_max_integrity_segments(struct request_queue *q, |
1691 | unsigned int segs) | |
1692 | { | |
1693 | q->limits.max_integrity_segments = segs; | |
1694 | } | |
1695 | ||
1696 | static inline unsigned short | |
af2c68fe | 1697 | queue_max_integrity_segments(const struct request_queue *q) |
13f05c8d MP |
1698 | { |
1699 | return q->limits.max_integrity_segments; | |
1700 | } | |
1701 | ||
359f6427 GE |
1702 | /** |
1703 | * bio_integrity_intervals - Return number of integrity intervals for a bio | |
1704 | * @bi: blk_integrity profile for device | |
1705 | * @sectors: Size of the bio in 512-byte sectors | |
1706 | * | |
1707 | * Description: The block layer calculates everything in 512 byte | |
1708 | * sectors but integrity metadata is done in terms of the data integrity | |
1709 | * interval size of the storage device. Convert the block layer sectors | |
1710 | * to the appropriate number of integrity intervals. | |
1711 | */ | |
1712 | static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi, | |
1713 | unsigned int sectors) | |
1714 | { | |
1715 | return sectors >> (bi->interval_exp - 9); | |
1716 | } | |
1717 | ||
1718 | static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, | |
1719 | unsigned int sectors) | |
1720 | { | |
1721 | return bio_integrity_intervals(bi, sectors) * bi->tuple_size; | |
1722 | } | |
1723 | ||
2a876f5e CH |
1724 | /* |
1725 | * Return the first bvec that contains integrity data. Only drivers that are | |
1726 | * limited to a single integrity segment should use this helper. | |
1727 | */ | |
1728 | static inline struct bio_vec *rq_integrity_vec(struct request *rq) | |
1729 | { | |
1730 | if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1)) | |
1731 | return NULL; | |
1732 | return rq->bio->bi_integrity->bip_vec; | |
1733 | } | |
1734 | ||
7ba1ba12 MP |
1735 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
1736 | ||
fd83240a SR |
1737 | struct bio; |
1738 | struct block_device; | |
1739 | struct gendisk; | |
1740 | struct blk_integrity; | |
1741 | ||
1742 | static inline int blk_integrity_rq(struct request *rq) | |
1743 | { | |
1744 | return 0; | |
1745 | } | |
1746 | static inline int blk_rq_count_integrity_sg(struct request_queue *q, | |
1747 | struct bio *b) | |
1748 | { | |
1749 | return 0; | |
1750 | } | |
1751 | static inline int blk_rq_map_integrity_sg(struct request_queue *q, | |
1752 | struct bio *b, | |
1753 | struct scatterlist *s) | |
1754 | { | |
1755 | return 0; | |
1756 | } | |
1757 | static inline struct blk_integrity *bdev_get_integrity(struct block_device *b) | |
1758 | { | |
61a04e5b | 1759 | return NULL; |
fd83240a SR |
1760 | } |
1761 | static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk) | |
1762 | { | |
1763 | return NULL; | |
1764 | } | |
d145dc23 ST |
1765 | static inline bool |
1766 | blk_integrity_queue_supports_integrity(struct request_queue *q) | |
1767 | { | |
1768 | return false; | |
1769 | } | |
fd83240a SR |
1770 | static inline int blk_integrity_compare(struct gendisk *a, struct gendisk *b) |
1771 | { | |
1772 | return 0; | |
1773 | } | |
25520d55 | 1774 | static inline void blk_integrity_register(struct gendisk *d, |
fd83240a SR |
1775 | struct blk_integrity *b) |
1776 | { | |
fd83240a SR |
1777 | } |
1778 | static inline void blk_integrity_unregister(struct gendisk *d) | |
1779 | { | |
1780 | } | |
1781 | static inline void blk_queue_max_integrity_segments(struct request_queue *q, | |
1782 | unsigned int segs) | |
1783 | { | |
1784 | } | |
af2c68fe | 1785 | static inline unsigned short queue_max_integrity_segments(const struct request_queue *q) |
fd83240a SR |
1786 | { |
1787 | return 0; | |
1788 | } | |
4eaf99be MP |
1789 | static inline bool blk_integrity_merge_rq(struct request_queue *rq, |
1790 | struct request *r1, | |
1791 | struct request *r2) | |
fd83240a | 1792 | { |
cb1a5ab6 | 1793 | return true; |
fd83240a | 1794 | } |
4eaf99be MP |
1795 | static inline bool blk_integrity_merge_bio(struct request_queue *rq, |
1796 | struct request *r, | |
1797 | struct bio *b) | |
fd83240a | 1798 | { |
cb1a5ab6 | 1799 | return true; |
fd83240a | 1800 | } |
25520d55 | 1801 | |
359f6427 GE |
1802 | static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi, |
1803 | unsigned int sectors) | |
1804 | { | |
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, | |
1809 | unsigned int sectors) | |
1810 | { | |
1811 | return 0; | |
1812 | } | |
1813 | ||
2a876f5e CH |
1814 | static inline struct bio_vec *rq_integrity_vec(struct request *rq) |
1815 | { | |
1816 | return NULL; | |
1817 | } | |
1818 | ||
7ba1ba12 MP |
1819 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
1820 | ||
d145dc23 ST |
1821 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION |
1822 | ||
1823 | bool blk_ksm_register(struct blk_keyslot_manager *ksm, struct request_queue *q); | |
1824 | ||
1825 | void blk_ksm_unregister(struct request_queue *q); | |
1826 | ||
1827 | #else /* CONFIG_BLK_INLINE_ENCRYPTION */ | |
1828 | ||
1829 | static inline bool blk_ksm_register(struct blk_keyslot_manager *ksm, | |
1830 | struct request_queue *q) | |
1831 | { | |
1832 | return true; | |
1833 | } | |
1834 | ||
1835 | static inline void blk_ksm_unregister(struct request_queue *q) { } | |
1836 | ||
1837 | #endif /* CONFIG_BLK_INLINE_ENCRYPTION */ | |
1838 | ||
1839 | ||
08f85851 | 1840 | struct block_device_operations { |
c62b37d9 | 1841 | blk_qc_t (*submit_bio) (struct bio *bio); |
d4430d62 | 1842 | int (*open) (struct block_device *, fmode_t); |
db2a144b | 1843 | void (*release) (struct gendisk *, fmode_t); |
3f289dcb | 1844 | int (*rw_page)(struct block_device *, sector_t, struct page *, unsigned int); |
d4430d62 AV |
1845 | int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); |
1846 | int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); | |
77ea887e TH |
1847 | unsigned int (*check_events) (struct gendisk *disk, |
1848 | unsigned int clearing); | |
c3e33e04 | 1849 | void (*unlock_native_capacity) (struct gendisk *); |
08f85851 AV |
1850 | int (*revalidate_disk) (struct gendisk *); |
1851 | int (*getgeo)(struct block_device *, struct hd_geometry *); | |
b3a27d05 NG |
1852 | /* this callback is with swap_lock and sometimes page table lock held */ |
1853 | void (*swap_slot_free_notify) (struct block_device *, unsigned long); | |
e76239a3 | 1854 | int (*report_zones)(struct gendisk *, sector_t sector, |
d4100351 | 1855 | unsigned int nr_zones, report_zones_cb cb, void *data); |
348e114b | 1856 | char *(*devnode)(struct gendisk *disk, umode_t *mode); |
08f85851 | 1857 | struct module *owner; |
bbd3e064 | 1858 | const struct pr_ops *pr_ops; |
08f85851 AV |
1859 | }; |
1860 | ||
ee6a129d AB |
1861 | #ifdef CONFIG_COMPAT |
1862 | extern int blkdev_compat_ptr_ioctl(struct block_device *, fmode_t, | |
1863 | unsigned int, unsigned long); | |
1864 | #else | |
1865 | #define blkdev_compat_ptr_ioctl NULL | |
1866 | #endif | |
1867 | ||
633a08b8 AV |
1868 | extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int, |
1869 | unsigned long); | |
47a191fd MW |
1870 | extern int bdev_read_page(struct block_device *, sector_t, struct page *); |
1871 | extern int bdev_write_page(struct block_device *, sector_t, struct page *, | |
1872 | struct writeback_control *); | |
6cc77e9c CH |
1873 | |
1874 | #ifdef CONFIG_BLK_DEV_ZONED | |
1875 | bool blk_req_needs_zone_write_lock(struct request *rq); | |
1392d370 | 1876 | bool blk_req_zone_write_trylock(struct request *rq); |
6cc77e9c CH |
1877 | void __blk_req_zone_write_lock(struct request *rq); |
1878 | void __blk_req_zone_write_unlock(struct request *rq); | |
1879 | ||
1880 | static inline void blk_req_zone_write_lock(struct request *rq) | |
1881 | { | |
1882 | if (blk_req_needs_zone_write_lock(rq)) | |
1883 | __blk_req_zone_write_lock(rq); | |
1884 | } | |
1885 | ||
1886 | static inline void blk_req_zone_write_unlock(struct request *rq) | |
1887 | { | |
1888 | if (rq->rq_flags & RQF_ZONE_WRITE_LOCKED) | |
1889 | __blk_req_zone_write_unlock(rq); | |
1890 | } | |
1891 | ||
1892 | static inline bool blk_req_zone_is_write_locked(struct request *rq) | |
1893 | { | |
1894 | return rq->q->seq_zones_wlock && | |
1895 | test_bit(blk_rq_zone_no(rq), rq->q->seq_zones_wlock); | |
1896 | } | |
1897 | ||
1898 | static inline bool blk_req_can_dispatch_to_zone(struct request *rq) | |
1899 | { | |
1900 | if (!blk_req_needs_zone_write_lock(rq)) | |
1901 | return true; | |
1902 | return !blk_req_zone_is_write_locked(rq); | |
1903 | } | |
1904 | #else | |
1905 | static inline bool blk_req_needs_zone_write_lock(struct request *rq) | |
1906 | { | |
1907 | return false; | |
1908 | } | |
1909 | ||
1910 | static inline void blk_req_zone_write_lock(struct request *rq) | |
1911 | { | |
1912 | } | |
1913 | ||
1914 | static inline void blk_req_zone_write_unlock(struct request *rq) | |
1915 | { | |
1916 | } | |
1917 | static inline bool blk_req_zone_is_write_locked(struct request *rq) | |
1918 | { | |
1919 | return false; | |
1920 | } | |
1921 | ||
1922 | static inline bool blk_req_can_dispatch_to_zone(struct request *rq) | |
1923 | { | |
1924 | return true; | |
1925 | } | |
1926 | #endif /* CONFIG_BLK_DEV_ZONED */ | |
1927 | ||
0619317f JA |
1928 | static inline void blk_wake_io_task(struct task_struct *waiter) |
1929 | { | |
1930 | /* | |
1931 | * If we're polling, the task itself is doing the completions. For | |
1932 | * that case, we don't need to signal a wakeup, it's enough to just | |
1933 | * mark us as RUNNING. | |
1934 | */ | |
1935 | if (waiter == current) | |
1936 | __set_current_state(TASK_RUNNING); | |
1937 | else | |
1938 | wake_up_process(waiter); | |
1939 | } | |
1940 | ||
956d510e CH |
1941 | unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors, |
1942 | unsigned int op); | |
1943 | void disk_end_io_acct(struct gendisk *disk, unsigned int op, | |
1944 | unsigned long start_time); | |
1945 | ||
7b26410b SL |
1946 | unsigned long part_start_io_acct(struct gendisk *disk, struct hd_struct **part, |
1947 | struct bio *bio); | |
1948 | void part_end_io_acct(struct hd_struct *part, struct bio *bio, | |
1949 | unsigned long start_time); | |
1950 | ||
956d510e CH |
1951 | /** |
1952 | * bio_start_io_acct - start I/O accounting for bio based drivers | |
1953 | * @bio: bio to start account for | |
1954 | * | |
1955 | * Returns the start time that should be passed back to bio_end_io_acct(). | |
1956 | */ | |
1957 | static inline unsigned long bio_start_io_acct(struct bio *bio) | |
1958 | { | |
1959 | return disk_start_io_acct(bio->bi_disk, bio_sectors(bio), bio_op(bio)); | |
1960 | } | |
1961 | ||
1962 | /** | |
1963 | * bio_end_io_acct - end I/O accounting for bio based drivers | |
1964 | * @bio: bio to end account for | |
1965 | * @start: start time returned by bio_start_io_acct() | |
1966 | */ | |
1967 | static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time) | |
1968 | { | |
1969 | return disk_end_io_acct(bio->bi_disk, bio_op(bio), start_time); | |
1970 | } | |
956d510e | 1971 | |
3f1266f1 CH |
1972 | int bdev_read_only(struct block_device *bdev); |
1973 | int set_blocksize(struct block_device *bdev, int size); | |
1974 | ||
1975 | const char *bdevname(struct block_device *bdev, char *buffer); | |
1976 | struct block_device *lookup_bdev(const char *); | |
1977 | ||
1978 | void blkdev_show(struct seq_file *seqf, off_t offset); | |
1979 | ||
1980 | #define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */ | |
1981 | #define BDEVT_SIZE 10 /* Largest string for MAJ:MIN for blkdev */ | |
1982 | #ifdef CONFIG_BLOCK | |
1983 | #define BLKDEV_MAJOR_MAX 512 | |
1984 | #else | |
1985 | #define BLKDEV_MAJOR_MAX 0 | |
1986 | #endif | |
1987 | ||
3f1266f1 CH |
1988 | struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, |
1989 | void *holder); | |
1990 | struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder); | |
ecbe6bc0 CH |
1991 | int bd_prepare_to_claim(struct block_device *bdev, struct block_device *whole, |
1992 | void *holder); | |
3f1266f1 CH |
1993 | void bd_abort_claiming(struct block_device *bdev, struct block_device *whole, |
1994 | void *holder); | |
1995 | void blkdev_put(struct block_device *bdev, fmode_t mode); | |
1996 | ||
621c1f42 | 1997 | struct block_device *I_BDEV(struct inode *inode); |
3f1266f1 CH |
1998 | struct block_device *bdget(dev_t); |
1999 | struct block_device *bdgrab(struct block_device *bdev); | |
2000 | void bdput(struct block_device *); | |
2001 | ||
2002 | #ifdef CONFIG_BLOCK | |
2003 | void invalidate_bdev(struct block_device *bdev); | |
384d87ef JK |
2004 | int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart, |
2005 | loff_t lend); | |
3f1266f1 CH |
2006 | int sync_blockdev(struct block_device *bdev); |
2007 | #else | |
2008 | static inline void invalidate_bdev(struct block_device *bdev) | |
2009 | { | |
2010 | } | |
384d87ef JK |
2011 | static inline int truncate_bdev_range(struct block_device *bdev, fmode_t mode, |
2012 | loff_t lstart, loff_t lend) | |
2013 | { | |
2014 | return 0; | |
2015 | } | |
3f1266f1 CH |
2016 | static inline int sync_blockdev(struct block_device *bdev) |
2017 | { | |
2018 | return 0; | |
2019 | } | |
1da177e4 | 2020 | #endif |
3f1266f1 CH |
2021 | int fsync_bdev(struct block_device *bdev); |
2022 | ||
2023 | struct super_block *freeze_bdev(struct block_device *bdev); | |
2024 | int thaw_bdev(struct block_device *bdev, struct super_block *sb); | |
2025 | ||
2026 | #endif /* _LINUX_BLKDEV_H */ |