Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8324aa91 JA |
2 | #ifndef BLK_INTERNAL_H |
3 | #define BLK_INTERNAL_H | |
4 | ||
a892c8d5 | 5 | #include <linux/blk-crypto.h> |
9bb33f24 | 6 | #include <linux/memblock.h> /* for max_pfn/max_low_pfn */ |
0eb4db47 | 7 | #include <linux/sched/sysctl.h> |
08420cf7 | 8 | #include <linux/timekeeping.h> |
c39ae60d | 9 | #include <xen/xen.h> |
a892c8d5 | 10 | #include "blk-crypto-internal.h" |
a73f730d | 11 | |
2e9bc346 CH |
12 | struct elevator_type; |
13 | ||
0d2602ca JA |
14 | /* Max future timer expiry for timeouts */ |
15 | #define BLK_MAX_TIMEOUT (5 * HZ) | |
16 | ||
18fbda91 | 17 | extern struct dentry *blk_debugfs_root; |
18fbda91 | 18 | |
7c94e1c1 | 19 | struct blk_flush_queue { |
b175c867 | 20 | spinlock_t mq_flush_lock; |
7c94e1c1 ML |
21 | unsigned int flush_pending_idx:1; |
22 | unsigned int flush_running_idx:1; | |
8d699663 | 23 | blk_status_t rq_status; |
7c94e1c1 ML |
24 | unsigned long flush_pending_since; |
25 | struct list_head flush_queue[2]; | |
b175c867 | 26 | unsigned long flush_data_in_flight; |
7c94e1c1 | 27 | struct request *flush_rq; |
7c94e1c1 ML |
28 | }; |
29 | ||
a9ed27a7 | 30 | bool is_flush_rq(struct request *req); |
8d699663 | 31 | |
754a1572 GJ |
32 | struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, |
33 | gfp_t flags); | |
f70ced09 | 34 | void blk_free_flush_queue(struct blk_flush_queue *q); |
f3552655 | 35 | |
3ef28e83 | 36 | void blk_freeze_queue(struct request_queue *q); |
aec89dc5 | 37 | void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic); |
8e141f9e | 38 | void blk_queue_start_drain(struct request_queue *q); |
c98cb5bb | 39 | int __bio_queue_enter(struct request_queue *q, struct bio *bio); |
3f98c753 | 40 | void submit_bio_noacct_nocheck(struct bio *bio); |
c98cb5bb JA |
41 | |
42 | static inline bool blk_try_enter_queue(struct request_queue *q, bool pm) | |
43 | { | |
44 | rcu_read_lock(); | |
45 | if (!percpu_ref_tryget_live_rcu(&q->q_usage_counter)) | |
46 | goto fail; | |
47 | ||
48 | /* | |
49 | * The code that increments the pm_only counter must ensure that the | |
50 | * counter is globally visible before the queue is unfrozen. | |
51 | */ | |
52 | if (blk_queue_pm_only(q) && | |
53 | (!pm || queue_rpm_status(q) == RPM_SUSPENDED)) | |
54 | goto fail_put; | |
55 | ||
56 | rcu_read_unlock(); | |
57 | return true; | |
58 | ||
59 | fail_put: | |
60 | blk_queue_exit(q); | |
61 | fail: | |
62 | rcu_read_unlock(); | |
63 | return false; | |
64 | } | |
65 | ||
66 | static inline int bio_queue_enter(struct bio *bio) | |
67 | { | |
68 | struct request_queue *q = bdev_get_queue(bio->bi_bdev); | |
69 | ||
70 | if (blk_try_enter_queue(q, false)) | |
71 | return 0; | |
72 | return __bio_queue_enter(q, bio); | |
73 | } | |
3ef28e83 | 74 | |
0eb4db47 KB |
75 | static inline void blk_wait_io(struct completion *done) |
76 | { | |
77 | /* Prevent hang_check timer from firing at us during very long I/O */ | |
78 | unsigned long timeout = sysctl_hung_task_timeout_secs * HZ / 2; | |
79 | ||
80 | if (timeout) | |
81 | while (!wait_for_completion_io_timeout(done, timeout)) | |
82 | ; | |
83 | else | |
84 | wait_for_completion_io(done); | |
85 | } | |
86 | ||
dc0b8a57 | 87 | #define BIO_INLINE_VECS 4 |
7a800a20 CH |
88 | struct bio_vec *bvec_alloc(mempool_t *pool, unsigned short *nr_vecs, |
89 | gfp_t gfp_mask); | |
90 | void bvec_free(mempool_t *pool, struct bio_vec *bv, unsigned short nr_vecs); | |
eec716a1 | 91 | |
7c8998f7 JC |
92 | bool bvec_try_merge_hw_page(struct request_queue *q, struct bio_vec *bv, |
93 | struct page *page, unsigned len, unsigned offset, | |
94 | bool *same_page); | |
95 | ||
3dccdae5 CH |
96 | static inline bool biovec_phys_mergeable(struct request_queue *q, |
97 | struct bio_vec *vec1, struct bio_vec *vec2) | |
6a9f5f24 | 98 | { |
3dccdae5 | 99 | unsigned long mask = queue_segment_boundary(q); |
6e768461 CH |
100 | phys_addr_t addr1 = page_to_phys(vec1->bv_page) + vec1->bv_offset; |
101 | phys_addr_t addr2 = page_to_phys(vec2->bv_page) + vec2->bv_offset; | |
3dccdae5 | 102 | |
f630a5d0 AP |
103 | /* |
104 | * Merging adjacent physical pages may not work correctly under KMSAN | |
105 | * if their metadata pages aren't adjacent. Just disable merging. | |
106 | */ | |
107 | if (IS_ENABLED(CONFIG_KMSAN)) | |
108 | return false; | |
109 | ||
3dccdae5 | 110 | if (addr1 + vec1->bv_len != addr2) |
6a9f5f24 | 111 | return false; |
0383ad43 | 112 | if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2->bv_page)) |
6a9f5f24 | 113 | return false; |
3dccdae5 CH |
114 | if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask)) |
115 | return false; | |
6a9f5f24 CH |
116 | return true; |
117 | } | |
118 | ||
aa261f20 | 119 | static inline bool __bvec_gap_to_prev(const struct queue_limits *lim, |
27ca1d4e CH |
120 | struct bio_vec *bprv, unsigned int offset) |
121 | { | |
c55ddd90 CH |
122 | return (offset & lim->virt_boundary_mask) || |
123 | ((bprv->bv_offset + bprv->bv_len) & lim->virt_boundary_mask); | |
27ca1d4e CH |
124 | } |
125 | ||
126 | /* | |
127 | * Check if adding a bio_vec after bprv with offset would create a gap in | |
128 | * the SG list. Most drivers don't care about this, but some do. | |
129 | */ | |
aa261f20 | 130 | static inline bool bvec_gap_to_prev(const struct queue_limits *lim, |
27ca1d4e CH |
131 | struct bio_vec *bprv, unsigned int offset) |
132 | { | |
c55ddd90 | 133 | if (!lim->virt_boundary_mask) |
27ca1d4e | 134 | return false; |
c55ddd90 | 135 | return __bvec_gap_to_prev(lim, bprv, offset); |
27ca1d4e CH |
136 | } |
137 | ||
badf7f64 CH |
138 | static inline bool rq_mergeable(struct request *rq) |
139 | { | |
140 | if (blk_rq_is_passthrough(rq)) | |
141 | return false; | |
142 | ||
143 | if (req_op(rq) == REQ_OP_FLUSH) | |
144 | return false; | |
145 | ||
146 | if (req_op(rq) == REQ_OP_WRITE_ZEROES) | |
147 | return false; | |
148 | ||
149 | if (req_op(rq) == REQ_OP_ZONE_APPEND) | |
150 | return false; | |
151 | ||
152 | if (rq->cmd_flags & REQ_NOMERGE_FLAGS) | |
153 | return false; | |
154 | if (rq->rq_flags & RQF_NOMERGE_FLAGS) | |
155 | return false; | |
156 | ||
157 | return true; | |
158 | } | |
159 | ||
160 | /* | |
161 | * There are two different ways to handle DISCARD merges: | |
162 | * 1) If max_discard_segments > 1, the driver treats every bio as a range and | |
163 | * send the bios to controller together. The ranges don't need to be | |
164 | * contiguous. | |
165 | * 2) Otherwise, the request will be normal read/write requests. The ranges | |
166 | * need to be contiguous. | |
167 | */ | |
168 | static inline bool blk_discard_mergable(struct request *req) | |
169 | { | |
170 | if (req_op(req) == REQ_OP_DISCARD && | |
171 | queue_max_discard_segments(req->q) > 1) | |
172 | return true; | |
173 | return false; | |
174 | } | |
175 | ||
49d24398 US |
176 | static inline unsigned int blk_rq_get_max_segments(struct request *rq) |
177 | { | |
178 | if (req_op(rq) == REQ_OP_DISCARD) | |
179 | return queue_max_discard_segments(rq->q); | |
180 | return queue_max_segments(rq->q); | |
181 | } | |
182 | ||
2a9336c4 | 183 | static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q, |
77e7ffd7 | 184 | enum req_op op) |
2a9336c4 CH |
185 | { |
186 | if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE)) | |
187 | return min(q->limits.max_discard_sectors, | |
188 | UINT_MAX >> SECTOR_SHIFT); | |
189 | ||
190 | if (unlikely(op == REQ_OP_WRITE_ZEROES)) | |
191 | return q->limits.max_write_zeroes_sectors; | |
192 | ||
193 | return q->limits.max_sectors; | |
194 | } | |
195 | ||
5a48fc14 DW |
196 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
197 | void blk_flush_integrity(void); | |
7c20f116 | 198 | bool __bio_integrity_endio(struct bio *); |
ece841ab | 199 | void bio_integrity_free(struct bio *bio); |
7c20f116 CH |
200 | static inline bool bio_integrity_endio(struct bio *bio) |
201 | { | |
202 | if (bio_integrity(bio)) | |
203 | return __bio_integrity_endio(bio); | |
204 | return true; | |
205 | } | |
43b729bf | 206 | |
92cf2fd1 CH |
207 | bool blk_integrity_merge_rq(struct request_queue *, struct request *, |
208 | struct request *); | |
d59da419 CH |
209 | bool blk_integrity_merge_bio(struct request_queue *, struct request *, |
210 | struct bio *); | |
92cf2fd1 | 211 | |
43b729bf CH |
212 | static inline bool integrity_req_gap_back_merge(struct request *req, |
213 | struct bio *next) | |
214 | { | |
215 | struct bio_integrity_payload *bip = bio_integrity(req->bio); | |
216 | struct bio_integrity_payload *bip_next = bio_integrity(next); | |
217 | ||
c55ddd90 CH |
218 | return bvec_gap_to_prev(&req->q->limits, |
219 | &bip->bip_vec[bip->bip_vcnt - 1], | |
43b729bf CH |
220 | bip_next->bip_vec[0].bv_offset); |
221 | } | |
222 | ||
223 | static inline bool integrity_req_gap_front_merge(struct request *req, | |
224 | struct bio *bio) | |
225 | { | |
226 | struct bio_integrity_payload *bip = bio_integrity(bio); | |
227 | struct bio_integrity_payload *bip_next = bio_integrity(req->bio); | |
228 | ||
c55ddd90 CH |
229 | return bvec_gap_to_prev(&req->q->limits, |
230 | &bip->bip_vec[bip->bip_vcnt - 1], | |
43b729bf CH |
231 | bip_next->bip_vec[0].bv_offset); |
232 | } | |
581e2600 | 233 | |
ff53cd52 | 234 | extern const struct attribute_group blk_integrity_attr_group; |
43b729bf | 235 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
92cf2fd1 CH |
236 | static inline bool blk_integrity_merge_rq(struct request_queue *rq, |
237 | struct request *r1, struct request *r2) | |
238 | { | |
239 | return true; | |
240 | } | |
d59da419 CH |
241 | static inline bool blk_integrity_merge_bio(struct request_queue *rq, |
242 | struct request *r, struct bio *b) | |
243 | { | |
244 | return true; | |
245 | } | |
43b729bf CH |
246 | static inline bool integrity_req_gap_back_merge(struct request *req, |
247 | struct bio *next) | |
248 | { | |
249 | return false; | |
250 | } | |
251 | static inline bool integrity_req_gap_front_merge(struct request *req, | |
252 | struct bio *bio) | |
253 | { | |
254 | return false; | |
255 | } | |
256 | ||
5a48fc14 DW |
257 | static inline void blk_flush_integrity(void) |
258 | { | |
259 | } | |
7c20f116 CH |
260 | static inline bool bio_integrity_endio(struct bio *bio) |
261 | { | |
262 | return true; | |
263 | } | |
ece841ab JT |
264 | static inline void bio_integrity_free(struct bio *bio) |
265 | { | |
266 | } | |
43b729bf | 267 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
8324aa91 | 268 | |
0d2602ca | 269 | unsigned long blk_rq_timeout(unsigned long timeout); |
87ee7b11 | 270 | void blk_add_timer(struct request *req); |
320ae51f | 271 | |
dd850ff3 DLM |
272 | enum bio_merge_status { |
273 | BIO_MERGE_OK, | |
274 | BIO_MERGE_NONE, | |
275 | BIO_MERGE_FAILED, | |
276 | }; | |
277 | ||
278 | enum bio_merge_status bio_attempt_back_merge(struct request *req, | |
279 | struct bio *bio, unsigned int nr_segs); | |
320ae51f | 280 | bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, |
0c5bcc92 | 281 | unsigned int nr_segs); |
bdc6a287 BW |
282 | bool blk_bio_list_merge(struct request_queue *q, struct list_head *list, |
283 | struct bio *bio, unsigned int nr_segs); | |
320ae51f | 284 | |
ba0ffdd8 JA |
285 | /* |
286 | * Plug flush limits | |
287 | */ | |
288 | #define BLK_MAX_REQUEST_COUNT 32 | |
289 | #define BLK_PLUG_FLUSH_SIZE (128 * 1024) | |
290 | ||
158dbda0 TH |
291 | /* |
292 | * Internal elevator interface | |
293 | */ | |
e8064021 | 294 | #define ELV_ON_HASH(rq) ((rq)->rq_flags & RQF_HASHED) |
158dbda0 | 295 | |
360f2648 | 296 | bool blk_insert_flush(struct request *rq); |
dd831006 | 297 | |
8237c01f | 298 | int elevator_switch(struct request_queue *q, struct elevator_type *new_e); |
64b36075 | 299 | void elevator_disable(struct request_queue *q); |
0c6cb3a2 | 300 | void elevator_exit(struct request_queue *q); |
cecf5d87 | 301 | int elv_register_queue(struct request_queue *q, bool uevent); |
83d016ac BVA |
302 | void elv_unregister_queue(struct request_queue *q); |
303 | ||
3ad5cee5 CH |
304 | ssize_t part_size_show(struct device *dev, struct device_attribute *attr, |
305 | char *buf); | |
306 | ssize_t part_stat_show(struct device *dev, struct device_attribute *attr, | |
307 | char *buf); | |
308 | ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr, | |
309 | char *buf); | |
310 | ssize_t part_fail_show(struct device *dev, struct device_attribute *attr, | |
311 | char *buf); | |
312 | ssize_t part_fail_store(struct device *dev, struct device_attribute *attr, | |
313 | const char *buf, size_t count); | |
581d4e28 JA |
314 | ssize_t part_timeout_show(struct device *, struct device_attribute *, char *); |
315 | ssize_t part_timeout_store(struct device *, struct device_attribute *, | |
316 | const char *, size_t); | |
581d4e28 | 317 | |
c55ddd90 | 318 | static inline bool bio_may_exceed_limits(struct bio *bio, |
aa261f20 | 319 | const struct queue_limits *lim) |
abd45c15 JA |
320 | { |
321 | switch (bio_op(bio)) { | |
322 | case REQ_OP_DISCARD: | |
323 | case REQ_OP_SECURE_ERASE: | |
324 | case REQ_OP_WRITE_ZEROES: | |
abd45c15 JA |
325 | return true; /* non-trivial splitting decisions */ |
326 | default: | |
327 | break; | |
328 | } | |
329 | ||
330 | /* | |
331 | * All drivers must accept single-segments bios that are <= PAGE_SIZE. | |
332 | * This is a quick and dirty check that relies on the fact that | |
333 | * bi_io_vec[0] is always valid if a bio has data. The check might | |
334 | * lead to occasional false negatives when bios are cloned, but compared | |
335 | * to the performance impact of cloned bios themselves the loop below | |
336 | * doesn't matter anyway. | |
337 | */ | |
c55ddd90 | 338 | return lim->chunk_sectors || bio->bi_vcnt != 1 || |
abd45c15 JA |
339 | bio->bi_io_vec->bv_len + bio->bi_io_vec->bv_offset > PAGE_SIZE; |
340 | } | |
341 | ||
aa261f20 BVA |
342 | struct bio *__bio_split_to_limits(struct bio *bio, |
343 | const struct queue_limits *lim, | |
344 | unsigned int *nr_segs); | |
14ccb66b CH |
345 | int ll_back_merge_fn(struct request *req, struct bio *bio, |
346 | unsigned int nr_segs); | |
fd2ef39c | 347 | bool blk_attempt_req_merge(struct request_queue *q, struct request *rq, |
5e84ea3a | 348 | struct request *next); |
e9cd19c0 | 349 | unsigned int blk_recalc_rq_segments(struct request *rq); |
050c8ea8 | 350 | bool blk_rq_merge_ok(struct request *rq, struct bio *bio); |
34fe7c05 | 351 | enum elv_merge blk_try_merge(struct request *rq, struct bio *bio); |
d6d48196 | 352 | |
d690cb8a | 353 | int blk_set_default_limits(struct queue_limits *lim); |
ff88972c AB |
354 | int blk_dev_init(void); |
355 | ||
c2553b58 JA |
356 | /* |
357 | * Contribute to IO statistics IFF: | |
358 | * | |
359 | * a) it's attached to a gendisk, and | |
48d9b0d4 | 360 | * b) the queue had IO stats enabled when this request was started |
c2553b58 | 361 | */ |
599d067d | 362 | static inline bool blk_do_io_stat(struct request *rq) |
fb8ec18c | 363 | { |
41fa7222 | 364 | return (rq->rq_flags & RQF_IO_STAT) && !blk_rq_is_passthrough(rq); |
be6bfe36 PB |
365 | } |
366 | ||
450b7879 | 367 | void update_io_ticks(struct block_device *part, unsigned long now, bool end); |
fb8ec18c | 368 | |
6cf7677f CH |
369 | static inline void req_set_nomerge(struct request_queue *q, struct request *req) |
370 | { | |
371 | req->cmd_flags |= REQ_NOMERGE; | |
372 | if (req == q->last_merge) | |
373 | q->last_merge = NULL; | |
374 | } | |
375 | ||
f2dbd76a TH |
376 | /* |
377 | * Internal io_context interface | |
378 | */ | |
87dd1d63 | 379 | struct io_cq *ioc_find_get_icq(struct request_queue *q); |
eca5892a | 380 | struct io_cq *ioc_lookup_icq(struct request_queue *q); |
5ef16305 | 381 | #ifdef CONFIG_BLK_ICQ |
7e5a8794 | 382 | void ioc_clear_queue(struct request_queue *q); |
5ef16305 CH |
383 | #else |
384 | static inline void ioc_clear_queue(struct request_queue *q) | |
385 | { | |
386 | } | |
387 | #endif /* CONFIG_BLK_ICQ */ | |
f2dbd76a | 388 | |
297e3d85 SL |
389 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
390 | extern ssize_t blk_throtl_sample_time_show(struct request_queue *q, char *page); | |
391 | extern ssize_t blk_throtl_sample_time_store(struct request_queue *q, | |
392 | const char *page, size_t count); | |
9e234eea | 393 | extern void blk_throtl_bio_endio(struct bio *bio); |
b9147dd1 | 394 | extern void blk_throtl_stat_add(struct request *rq, u64 time); |
9e234eea SL |
395 | #else |
396 | static inline void blk_throtl_bio_endio(struct bio *bio) { } | |
b9147dd1 | 397 | static inline void blk_throtl_stat_add(struct request *rq, u64 time) { } |
297e3d85 | 398 | #endif |
bc9fcbf9 | 399 | |
51d798cd | 400 | struct bio *__blk_queue_bounce(struct bio *bio, struct request_queue *q); |
9bb33f24 CH |
401 | |
402 | static inline bool blk_queue_may_bounce(struct request_queue *q) | |
403 | { | |
404 | return IS_ENABLED(CONFIG_BOUNCE) && | |
405 | q->limits.bounce == BLK_BOUNCE_HIGH && | |
406 | max_low_pfn >= max_pfn; | |
407 | } | |
408 | ||
51d798cd CH |
409 | static inline struct bio *blk_queue_bounce(struct bio *bio, |
410 | struct request_queue *q) | |
3bce016a | 411 | { |
51d798cd CH |
412 | if (unlikely(blk_queue_may_bounce(q) && bio_has_data(bio))) |
413 | return __blk_queue_bounce(bio, q); | |
414 | return bio; | |
3bce016a | 415 | } |
3bce016a | 416 | |
bf505456 | 417 | #ifdef CONFIG_BLK_DEV_ZONED |
dd291d77 DLM |
418 | void disk_init_zone_resources(struct gendisk *disk); |
419 | void disk_free_zone_resources(struct gendisk *disk); | |
420 | static inline bool bio_zone_write_plugging(struct bio *bio) | |
421 | { | |
422 | return bio_flagged(bio, BIO_ZONE_WRITE_PLUGGING); | |
423 | } | |
424 | void blk_zone_write_plug_bio_merged(struct bio *bio); | |
425 | void blk_zone_write_plug_attempt_merge(struct request *rq); | |
a0508c36 DLM |
426 | static inline void blk_zone_update_request_bio(struct request *rq, |
427 | struct bio *bio) | |
428 | { | |
429 | /* | |
430 | * For zone append requests, the request sector indicates the location | |
431 | * at which the BIO data was written. Return this value to the BIO | |
432 | * issuer through the BIO iter sector. | |
dd291d77 DLM |
433 | * For plugged zone writes, we need the original BIO sector so |
434 | * that blk_zone_write_plug_bio_endio() can lookup the zone write plug. | |
a0508c36 | 435 | */ |
dd291d77 | 436 | if (req_op(rq) == REQ_OP_ZONE_APPEND || bio_zone_write_plugging(bio)) |
a0508c36 DLM |
437 | bio->bi_iter.bi_sector = rq->__sector; |
438 | } | |
dd291d77 DLM |
439 | void blk_zone_write_plug_bio_endio(struct bio *bio); |
440 | static inline void blk_zone_bio_endio(struct bio *bio) | |
441 | { | |
442 | /* | |
443 | * For write BIOs to zoned devices, signal the completion of the BIO so | |
444 | * that the next write BIO can be submitted by zone write plugging. | |
445 | */ | |
446 | if (bio_zone_write_plugging(bio)) | |
447 | blk_zone_write_plug_bio_endio(bio); | |
448 | } | |
449 | ||
450 | void blk_zone_write_plug_complete_request(struct request *rq); | |
451 | static inline void blk_zone_complete_request(struct request *rq) | |
452 | { | |
453 | if (rq->rq_flags & RQF_ZONE_WRITE_PLUGGING) | |
454 | blk_zone_write_plug_complete_request(rq); | |
455 | } | |
5e4ea834 CH |
456 | int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd, |
457 | unsigned long arg); | |
05bdb996 | 458 | int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode, |
cfb42576 CH |
459 | unsigned int cmd, unsigned long arg); |
460 | #else /* CONFIG_BLK_DEV_ZONED */ | |
dd291d77 DLM |
461 | static inline void disk_init_zone_resources(struct gendisk *disk) |
462 | { | |
463 | } | |
464 | static inline void disk_free_zone_resources(struct gendisk *disk) | |
465 | { | |
466 | } | |
467 | static inline bool bio_zone_write_plugging(struct bio *bio) | |
468 | { | |
469 | return false; | |
470 | } | |
471 | static inline void blk_zone_write_plug_bio_merged(struct bio *bio) | |
472 | { | |
473 | } | |
474 | static inline void blk_zone_write_plug_attempt_merge(struct request *rq) | |
a0508c36 DLM |
475 | { |
476 | } | |
477 | static inline void blk_zone_update_request_bio(struct request *rq, | |
478 | struct bio *bio) | |
479 | { | |
480 | } | |
dd291d77 DLM |
481 | static inline void blk_zone_bio_endio(struct bio *bio) |
482 | { | |
483 | } | |
484 | static inline void blk_zone_complete_request(struct request *rq) | |
485 | { | |
486 | } | |
cfb42576 | 487 | static inline int blkdev_report_zones_ioctl(struct block_device *bdev, |
5e4ea834 | 488 | unsigned int cmd, unsigned long arg) |
cfb42576 CH |
489 | { |
490 | return -ENOTTY; | |
491 | } | |
492 | static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev, | |
05bdb996 | 493 | blk_mode_t mode, unsigned int cmd, unsigned long arg) |
cfb42576 CH |
494 | { |
495 | return -ENOTTY; | |
496 | } | |
497 | #endif /* CONFIG_BLK_DEV_ZONED */ | |
498 | ||
499 | struct block_device *bdev_alloc(struct gendisk *disk, u8 partno); | |
500 | void bdev_add(struct block_device *bdev, dev_t dev); | |
bf505456 | 501 | |
7c3f828b CH |
502 | int blk_alloc_ext_minor(void); |
503 | void blk_free_ext_minor(unsigned int minor); | |
581e2600 CH |
504 | #define ADDPART_FLAG_NONE 0 |
505 | #define ADDPART_FLAG_RAID 1 | |
506 | #define ADDPART_FLAG_WHOLEDISK 2 | |
7f6be376 CH |
507 | int bdev_add_partition(struct gendisk *disk, int partno, sector_t start, |
508 | sector_t length); | |
926fbb16 | 509 | int bdev_del_partition(struct gendisk *disk, int partno); |
3d2e7989 CH |
510 | int bdev_resize_partition(struct gendisk *disk, int partno, sector_t start, |
511 | sector_t length); | |
eec1be4c | 512 | void drop_partition(struct block_device *part); |
581e2600 | 513 | |
83794367 DLM |
514 | void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors); |
515 | ||
6f8191fd CH |
516 | struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, |
517 | struct lock_class_key *lkclass); | |
518 | ||
e4581105 | 519 | int bio_add_hw_page(struct request_queue *q, struct bio *bio, |
130879f1 | 520 | struct page *page, unsigned int len, unsigned int offset, |
e4581105 | 521 | unsigned int max_sectors, bool *same_page); |
130879f1 | 522 | |
fd363244 DH |
523 | /* |
524 | * Clean up a page appropriately, where the page may be pinned, may have a | |
525 | * ref taken on it or neither. | |
526 | */ | |
527 | static inline void bio_release_page(struct bio *bio, struct page *page) | |
528 | { | |
529 | if (bio_flagged(bio, BIO_PAGE_PINNED)) | |
530 | unpin_user_page(page); | |
fd363244 DH |
531 | } |
532 | ||
ad751ba1 | 533 | struct request_queue *blk_alloc_queue(struct queue_limits *lim, int node_id); |
704b914f | 534 | |
05bdb996 | 535 | int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode); |
da7ba729 | 536 | |
92e7755e | 537 | int disk_alloc_events(struct gendisk *disk); |
d5870edf CH |
538 | void disk_add_events(struct gendisk *disk); |
539 | void disk_del_events(struct gendisk *disk); | |
540 | void disk_release_events(struct gendisk *disk); | |
926597ff CH |
541 | void disk_block_events(struct gendisk *disk); |
542 | void disk_unblock_events(struct gendisk *disk); | |
543 | void disk_flush_events(struct gendisk *disk, unsigned int mask); | |
2bc8cda5 CH |
544 | extern struct device_attribute dev_attr_events; |
545 | extern struct device_attribute dev_attr_events_async; | |
546 | extern struct device_attribute dev_attr_events_poll_msecs; | |
d5870edf | 547 | |
cc5c516d CH |
548 | extern struct attribute_group blk_trace_attr_group; |
549 | ||
05bdb996 CH |
550 | blk_mode_t file_to_blk_mode(struct file *file); |
551 | int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode, | |
552 | loff_t lstart, loff_t lend); | |
8a709512 | 553 | long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg); |
84b8514b CH |
554 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg); |
555 | ||
cd82cca7 CH |
556 | extern const struct address_space_operations def_blk_aops; |
557 | ||
22d0c408 | 558 | int disk_register_independent_access_ranges(struct gendisk *disk); |
a2247f19 DLM |
559 | void disk_unregister_independent_access_ranges(struct gendisk *disk); |
560 | ||
06c8c691 CH |
561 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
562 | bool should_fail_request(struct block_device *part, unsigned int bytes); | |
563 | #else /* CONFIG_FAIL_MAKE_REQUEST */ | |
564 | static inline bool should_fail_request(struct block_device *part, | |
565 | unsigned int bytes) | |
566 | { | |
567 | return false; | |
568 | } | |
569 | #endif /* CONFIG_FAIL_MAKE_REQUEST */ | |
570 | ||
0a467d0f JA |
571 | /* |
572 | * Optimized request reference counting. Ideally we'd make timeouts be more | |
573 | * clever, as that's the only reason we need references at all... But until | |
574 | * this happens, this is faster than using refcount_t. Also see: | |
575 | * | |
576 | * abc54d634334 ("io_uring: switch to atomic_t for io_kiocb reference count") | |
577 | */ | |
578 | #define req_ref_zero_or_close_to_overflow(req) \ | |
579 | ((unsigned int) atomic_read(&(req->ref)) + 127u <= 127u) | |
580 | ||
581 | static inline bool req_ref_inc_not_zero(struct request *req) | |
582 | { | |
583 | return atomic_inc_not_zero(&req->ref); | |
584 | } | |
585 | ||
586 | static inline bool req_ref_put_and_test(struct request *req) | |
587 | { | |
588 | WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req)); | |
589 | return atomic_dec_and_test(&req->ref); | |
590 | } | |
591 | ||
592 | static inline void req_ref_set(struct request *req, int value) | |
593 | { | |
594 | atomic_set(&req->ref, value); | |
595 | } | |
596 | ||
597 | static inline int req_ref_read(struct request *req) | |
598 | { | |
599 | return atomic_read(&req->ref); | |
600 | } | |
601 | ||
08420cf7 JA |
602 | static inline u64 blk_time_get_ns(void) |
603 | { | |
da4c8c3d JA |
604 | struct blk_plug *plug = current->plug; |
605 | ||
b874d4aa | 606 | if (!plug || !in_task()) |
da4c8c3d JA |
607 | return ktime_get_ns(); |
608 | ||
609 | /* | |
610 | * 0 could very well be a valid time, but rather than flag "this is | |
611 | * a valid timestamp" separately, just accept that we'll do an extra | |
612 | * ktime_get_ns() if we just happen to get 0 as the current time. | |
613 | */ | |
06b23f92 | 614 | if (!plug->cur_ktime) { |
da4c8c3d | 615 | plug->cur_ktime = ktime_get_ns(); |
06b23f92 JA |
616 | current->flags |= PF_BLOCK_TS; |
617 | } | |
da4c8c3d | 618 | return plug->cur_ktime; |
08420cf7 JA |
619 | } |
620 | ||
621 | static inline ktime_t blk_time_get(void) | |
622 | { | |
623 | return ns_to_ktime(blk_time_get_ns()); | |
624 | } | |
625 | ||
c4e47bbb JA |
626 | /* |
627 | * From most significant bit: | |
628 | * 1 bit: reserved for other usage, see below | |
629 | * 12 bits: original size of bio | |
630 | * 51 bits: issue time of bio | |
631 | */ | |
632 | #define BIO_ISSUE_RES_BITS 1 | |
633 | #define BIO_ISSUE_SIZE_BITS 12 | |
634 | #define BIO_ISSUE_RES_SHIFT (64 - BIO_ISSUE_RES_BITS) | |
635 | #define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS) | |
636 | #define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1) | |
637 | #define BIO_ISSUE_SIZE_MASK \ | |
638 | (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT) | |
639 | #define BIO_ISSUE_RES_MASK (~((1ULL << BIO_ISSUE_RES_SHIFT) - 1)) | |
640 | ||
641 | /* Reserved bit for blk-throtl */ | |
642 | #define BIO_ISSUE_THROTL_SKIP_LATENCY (1ULL << 63) | |
643 | ||
644 | static inline u64 __bio_issue_time(u64 time) | |
645 | { | |
646 | return time & BIO_ISSUE_TIME_MASK; | |
647 | } | |
648 | ||
649 | static inline u64 bio_issue_time(struct bio_issue *issue) | |
650 | { | |
651 | return __bio_issue_time(issue->value); | |
652 | } | |
653 | ||
654 | static inline sector_t bio_issue_size(struct bio_issue *issue) | |
655 | { | |
656 | return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT); | |
657 | } | |
658 | ||
659 | static inline void bio_issue_init(struct bio_issue *issue, | |
660 | sector_t size) | |
661 | { | |
662 | size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1; | |
663 | issue->value = ((issue->value & BIO_ISSUE_RES_MASK) | | |
08420cf7 | 664 | (blk_time_get_ns() & BIO_ISSUE_TIME_MASK) | |
c4e47bbb JA |
665 | ((u64)size << BIO_ISSUE_SIZE_SHIFT)); |
666 | } | |
667 | ||
7c09a4ed | 668 | void bdev_release(struct file *bdev_file); |
a56aefca CB |
669 | int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder, |
670 | const struct blk_holder_ops *hops, struct file *bdev_file); | |
671 | int bdev_permission(dev_t dev, blk_mode_t mode, void *holder); | |
1ddeeb2a | 672 | |
bc9fcbf9 | 673 | #endif /* BLK_INTERNAL_H */ |