Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8324aa91 JA |
2 | #ifndef BLK_INTERNAL_H |
3 | #define BLK_INTERNAL_H | |
4 | ||
a73f730d | 5 | #include <linux/idr.h> |
f70ced09 | 6 | #include <linux/blk-mq.h> |
c6a564ff | 7 | #include <linux/part_stat.h> |
a892c8d5 | 8 | #include <linux/blk-crypto.h> |
c39ae60d | 9 | #include <xen/xen.h> |
a892c8d5 | 10 | #include "blk-crypto-internal.h" |
f70ced09 | 11 | #include "blk-mq.h" |
c3e22192 | 12 | #include "blk-mq-sched.h" |
a73f730d | 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 { |
7c94e1c1 ML |
20 | unsigned int flush_pending_idx:1; |
21 | unsigned int flush_running_idx:1; | |
8d699663 | 22 | blk_status_t rq_status; |
7c94e1c1 ML |
23 | unsigned long flush_pending_since; |
24 | struct list_head flush_queue[2]; | |
25 | struct list_head flush_data_in_flight; | |
26 | struct request *flush_rq; | |
0048b483 | 27 | |
7c94e1c1 ML |
28 | spinlock_t mq_flush_lock; |
29 | }; | |
30 | ||
8324aa91 JA |
31 | extern struct kmem_cache *blk_requestq_cachep; |
32 | extern struct kobj_type blk_queue_ktype; | |
a73f730d | 33 | extern struct ida blk_queue_ida; |
8324aa91 | 34 | |
f9afca4d JA |
35 | static inline struct blk_flush_queue * |
36 | blk_get_flush_queue(struct request_queue *q, struct blk_mq_ctx *ctx) | |
7c94e1c1 | 37 | { |
8ccdf4a3 | 38 | return blk_mq_map_queue(q, REQ_OP_FLUSH, ctx)->fq; |
7c94e1c1 ML |
39 | } |
40 | ||
09ac46c4 TH |
41 | static inline void __blk_get_queue(struct request_queue *q) |
42 | { | |
43 | kobject_get(&q->kobj); | |
44 | } | |
45 | ||
8d699663 YY |
46 | static inline bool |
47 | is_flush_rq(struct request *req, struct blk_mq_hw_ctx *hctx) | |
48 | { | |
49 | return hctx->fq->flush_rq == req; | |
50 | } | |
51 | ||
754a1572 GJ |
52 | struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, |
53 | gfp_t flags); | |
f70ced09 | 54 | void blk_free_flush_queue(struct blk_flush_queue *q); |
f3552655 | 55 | |
3ef28e83 DW |
56 | void blk_freeze_queue(struct request_queue *q); |
57 | ||
3dccdae5 CH |
58 | static inline bool biovec_phys_mergeable(struct request_queue *q, |
59 | struct bio_vec *vec1, struct bio_vec *vec2) | |
6a9f5f24 | 60 | { |
3dccdae5 | 61 | unsigned long mask = queue_segment_boundary(q); |
6e768461 CH |
62 | phys_addr_t addr1 = page_to_phys(vec1->bv_page) + vec1->bv_offset; |
63 | phys_addr_t addr2 = page_to_phys(vec2->bv_page) + vec2->bv_offset; | |
3dccdae5 CH |
64 | |
65 | if (addr1 + vec1->bv_len != addr2) | |
6a9f5f24 | 66 | return false; |
0383ad43 | 67 | if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2->bv_page)) |
6a9f5f24 | 68 | return false; |
3dccdae5 CH |
69 | if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask)) |
70 | return false; | |
6a9f5f24 CH |
71 | return true; |
72 | } | |
73 | ||
27ca1d4e CH |
74 | static inline bool __bvec_gap_to_prev(struct request_queue *q, |
75 | struct bio_vec *bprv, unsigned int offset) | |
76 | { | |
df376b2e | 77 | return (offset & queue_virt_boundary(q)) || |
27ca1d4e CH |
78 | ((bprv->bv_offset + bprv->bv_len) & queue_virt_boundary(q)); |
79 | } | |
80 | ||
81 | /* | |
82 | * Check if adding a bio_vec after bprv with offset would create a gap in | |
83 | * the SG list. Most drivers don't care about this, but some do. | |
84 | */ | |
85 | static inline bool bvec_gap_to_prev(struct request_queue *q, | |
86 | struct bio_vec *bprv, unsigned int offset) | |
87 | { | |
88 | if (!queue_virt_boundary(q)) | |
89 | return false; | |
90 | return __bvec_gap_to_prev(q, bprv, offset); | |
91 | } | |
92 | ||
5a48fc14 DW |
93 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
94 | void blk_flush_integrity(void); | |
7c20f116 | 95 | bool __bio_integrity_endio(struct bio *); |
ece841ab | 96 | void bio_integrity_free(struct bio *bio); |
7c20f116 CH |
97 | static inline bool bio_integrity_endio(struct bio *bio) |
98 | { | |
99 | if (bio_integrity(bio)) | |
100 | return __bio_integrity_endio(bio); | |
101 | return true; | |
102 | } | |
43b729bf | 103 | |
92cf2fd1 CH |
104 | bool blk_integrity_merge_rq(struct request_queue *, struct request *, |
105 | struct request *); | |
d59da419 CH |
106 | bool blk_integrity_merge_bio(struct request_queue *, struct request *, |
107 | struct bio *); | |
92cf2fd1 | 108 | |
43b729bf CH |
109 | static inline bool integrity_req_gap_back_merge(struct request *req, |
110 | struct bio *next) | |
111 | { | |
112 | struct bio_integrity_payload *bip = bio_integrity(req->bio); | |
113 | struct bio_integrity_payload *bip_next = bio_integrity(next); | |
114 | ||
115 | return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1], | |
116 | bip_next->bip_vec[0].bv_offset); | |
117 | } | |
118 | ||
119 | static inline bool integrity_req_gap_front_merge(struct request *req, | |
120 | struct bio *bio) | |
121 | { | |
122 | struct bio_integrity_payload *bip = bio_integrity(bio); | |
123 | struct bio_integrity_payload *bip_next = bio_integrity(req->bio); | |
124 | ||
125 | return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1], | |
126 | bip_next->bip_vec[0].bv_offset); | |
127 | } | |
581e2600 CH |
128 | |
129 | void blk_integrity_add(struct gendisk *); | |
130 | void blk_integrity_del(struct gendisk *); | |
43b729bf | 131 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
92cf2fd1 CH |
132 | static inline bool blk_integrity_merge_rq(struct request_queue *rq, |
133 | struct request *r1, struct request *r2) | |
134 | { | |
135 | return true; | |
136 | } | |
d59da419 CH |
137 | static inline bool blk_integrity_merge_bio(struct request_queue *rq, |
138 | struct request *r, struct bio *b) | |
139 | { | |
140 | return true; | |
141 | } | |
43b729bf CH |
142 | static inline bool integrity_req_gap_back_merge(struct request *req, |
143 | struct bio *next) | |
144 | { | |
145 | return false; | |
146 | } | |
147 | static inline bool integrity_req_gap_front_merge(struct request *req, | |
148 | struct bio *bio) | |
149 | { | |
150 | return false; | |
151 | } | |
152 | ||
5a48fc14 DW |
153 | static inline void blk_flush_integrity(void) |
154 | { | |
155 | } | |
7c20f116 CH |
156 | static inline bool bio_integrity_endio(struct bio *bio) |
157 | { | |
158 | return true; | |
159 | } | |
ece841ab JT |
160 | static inline void bio_integrity_free(struct bio *bio) |
161 | { | |
162 | } | |
581e2600 CH |
163 | static inline void blk_integrity_add(struct gendisk *disk) |
164 | { | |
165 | } | |
166 | static inline void blk_integrity_del(struct gendisk *disk) | |
167 | { | |
168 | } | |
43b729bf | 169 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
8324aa91 | 170 | |
0d2602ca | 171 | unsigned long blk_rq_timeout(unsigned long timeout); |
87ee7b11 | 172 | void blk_add_timer(struct request *req); |
320ae51f | 173 | |
320ae51f | 174 | bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, |
14ccb66b | 175 | unsigned int nr_segs, struct request **same_queue_rq); |
bdc6a287 BW |
176 | bool blk_bio_list_merge(struct request_queue *q, struct list_head *list, |
177 | struct bio *bio, unsigned int nr_segs); | |
320ae51f | 178 | |
b5af37ab | 179 | void blk_account_io_start(struct request *req); |
522a7775 | 180 | void blk_account_io_done(struct request *req, u64 now); |
320ae51f | 181 | |
158dbda0 TH |
182 | /* |
183 | * Internal elevator interface | |
184 | */ | |
e8064021 | 185 | #define ELV_ON_HASH(rq) ((rq)->rq_flags & RQF_HASHED) |
158dbda0 | 186 | |
ae1b1539 | 187 | void blk_insert_flush(struct request *rq); |
dd831006 | 188 | |
954b4a5c | 189 | void elevator_init_mq(struct request_queue *q); |
d48ece20 JW |
190 | int elevator_switch_mq(struct request_queue *q, |
191 | struct elevator_type *new_e); | |
c3e22192 | 192 | void __elevator_exit(struct request_queue *, struct elevator_queue *); |
cecf5d87 | 193 | int elv_register_queue(struct request_queue *q, bool uevent); |
83d016ac BVA |
194 | void elv_unregister_queue(struct request_queue *q); |
195 | ||
c3e22192 ML |
196 | static inline void elevator_exit(struct request_queue *q, |
197 | struct elevator_queue *e) | |
198 | { | |
284b94be ML |
199 | lockdep_assert_held(&q->sysfs_lock); |
200 | ||
c3e22192 ML |
201 | blk_mq_sched_free_requests(q); |
202 | __elevator_exit(q, e); | |
203 | } | |
204 | ||
8446fe92 | 205 | struct block_device *__disk_get_part(struct gendisk *disk, int partno); |
807d4af2 | 206 | |
3ad5cee5 CH |
207 | ssize_t part_size_show(struct device *dev, struct device_attribute *attr, |
208 | char *buf); | |
209 | ssize_t part_stat_show(struct device *dev, struct device_attribute *attr, | |
210 | char *buf); | |
211 | ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr, | |
212 | char *buf); | |
213 | ssize_t part_fail_show(struct device *dev, struct device_attribute *attr, | |
214 | char *buf); | |
215 | ssize_t part_fail_store(struct device *dev, struct device_attribute *attr, | |
216 | const char *buf, size_t count); | |
581d4e28 JA |
217 | ssize_t part_timeout_show(struct device *, struct device_attribute *, char *); |
218 | ssize_t part_timeout_store(struct device *, struct device_attribute *, | |
219 | const char *, size_t); | |
581d4e28 | 220 | |
f695ca38 | 221 | void __blk_queue_split(struct bio **bio, unsigned int *nr_segs); |
14ccb66b CH |
222 | int ll_back_merge_fn(struct request *req, struct bio *bio, |
223 | unsigned int nr_segs); | |
5e84ea3a JA |
224 | int blk_attempt_req_merge(struct request_queue *q, struct request *rq, |
225 | struct request *next); | |
e9cd19c0 | 226 | unsigned int blk_recalc_rq_segments(struct request *rq); |
80a761fd | 227 | void blk_rq_set_mixed_merge(struct request *rq); |
050c8ea8 | 228 | bool blk_rq_merge_ok(struct request *rq, struct bio *bio); |
34fe7c05 | 229 | enum elv_merge blk_try_merge(struct request *rq, struct bio *bio); |
d6d48196 | 230 | |
ff88972c AB |
231 | int blk_dev_init(void); |
232 | ||
c2553b58 JA |
233 | /* |
234 | * Contribute to IO statistics IFF: | |
235 | * | |
236 | * a) it's attached to a gendisk, and | |
48d9b0d4 | 237 | * b) the queue had IO stats enabled when this request was started |
c2553b58 | 238 | */ |
599d067d | 239 | static inline bool blk_do_io_stat(struct request *rq) |
fb8ec18c | 240 | { |
48d9b0d4 | 241 | return rq->rq_disk && (rq->rq_flags & RQF_IO_STAT); |
fb8ec18c JA |
242 | } |
243 | ||
6cf7677f CH |
244 | static inline void req_set_nomerge(struct request_queue *q, struct request *req) |
245 | { | |
246 | req->cmd_flags |= REQ_NOMERGE; | |
247 | if (req == q->last_merge) | |
248 | q->last_merge = NULL; | |
249 | } | |
250 | ||
1adfc5e4 ML |
251 | /* |
252 | * The max size one bio can handle is UINT_MAX becasue bvec_iter.bi_size | |
253 | * is defined as 'unsigned int', meantime it has to aligned to with logical | |
254 | * block size which is the minimum accepted unit by hardware. | |
255 | */ | |
256 | static inline unsigned int bio_allowed_max_sectors(struct request_queue *q) | |
257 | { | |
258 | return round_down(UINT_MAX, queue_logical_block_size(q)) >> 9; | |
259 | } | |
260 | ||
9b15d109 CL |
261 | /* |
262 | * The max bio size which is aligned to q->limits.discard_granularity. This | |
263 | * is a hint to split large discard bio in generic block layer, then if device | |
264 | * driver needs to split the discard bio into smaller ones, their bi_size can | |
265 | * be very probably and easily aligned to discard_granularity of the device's | |
266 | * queue. | |
267 | */ | |
268 | static inline unsigned int bio_aligned_discard_max_sectors( | |
269 | struct request_queue *q) | |
270 | { | |
271 | return round_down(UINT_MAX, q->limits.discard_granularity) >> | |
272 | SECTOR_SHIFT; | |
273 | } | |
274 | ||
f2dbd76a TH |
275 | /* |
276 | * Internal io_context interface | |
277 | */ | |
278 | void get_io_context(struct io_context *ioc); | |
47fdd4ca | 279 | struct io_cq *ioc_lookup_icq(struct io_context *ioc, struct request_queue *q); |
24acfc34 TH |
280 | struct io_cq *ioc_create_icq(struct io_context *ioc, struct request_queue *q, |
281 | gfp_t gfp_mask); | |
7e5a8794 | 282 | void ioc_clear_queue(struct request_queue *q); |
f2dbd76a | 283 | |
24acfc34 | 284 | int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node); |
f2dbd76a | 285 | |
f2dbd76a TH |
286 | /* |
287 | * Internal throttling interface | |
288 | */ | |
bc9fcbf9 | 289 | #ifdef CONFIG_BLK_DEV_THROTTLING |
bc9fcbf9 TH |
290 | extern int blk_throtl_init(struct request_queue *q); |
291 | extern void blk_throtl_exit(struct request_queue *q); | |
d61fcfa4 | 292 | extern void blk_throtl_register_queue(struct request_queue *q); |
db18a53e | 293 | bool blk_throtl_bio(struct bio *bio); |
bc9fcbf9 | 294 | #else /* CONFIG_BLK_DEV_THROTTLING */ |
bc9fcbf9 TH |
295 | static inline int blk_throtl_init(struct request_queue *q) { return 0; } |
296 | static inline void blk_throtl_exit(struct request_queue *q) { } | |
d61fcfa4 | 297 | static inline void blk_throtl_register_queue(struct request_queue *q) { } |
db18a53e | 298 | static inline bool blk_throtl_bio(struct bio *bio) { return false; } |
bc9fcbf9 | 299 | #endif /* CONFIG_BLK_DEV_THROTTLING */ |
297e3d85 SL |
300 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
301 | extern ssize_t blk_throtl_sample_time_show(struct request_queue *q, char *page); | |
302 | extern ssize_t blk_throtl_sample_time_store(struct request_queue *q, | |
303 | const char *page, size_t count); | |
9e234eea | 304 | extern void blk_throtl_bio_endio(struct bio *bio); |
b9147dd1 | 305 | extern void blk_throtl_stat_add(struct request *rq, u64 time); |
9e234eea SL |
306 | #else |
307 | static inline void blk_throtl_bio_endio(struct bio *bio) { } | |
b9147dd1 | 308 | static inline void blk_throtl_stat_add(struct request *rq, u64 time) { } |
297e3d85 | 309 | #endif |
bc9fcbf9 | 310 | |
3bce016a CH |
311 | #ifdef CONFIG_BOUNCE |
312 | extern int init_emergency_isa_pool(void); | |
313 | extern void blk_queue_bounce(struct request_queue *q, struct bio **bio); | |
314 | #else | |
315 | static inline int init_emergency_isa_pool(void) | |
316 | { | |
317 | return 0; | |
318 | } | |
319 | static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio) | |
320 | { | |
321 | } | |
322 | #endif /* CONFIG_BOUNCE */ | |
323 | ||
d7067512 JB |
324 | #ifdef CONFIG_BLK_CGROUP_IOLATENCY |
325 | extern int blk_iolatency_init(struct request_queue *q); | |
326 | #else | |
327 | static inline int blk_iolatency_init(struct request_queue *q) { return 0; } | |
328 | #endif | |
329 | ||
a2d6b3a2 DLM |
330 | struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); |
331 | ||
bf505456 DLM |
332 | #ifdef CONFIG_BLK_DEV_ZONED |
333 | void blk_queue_free_zone_bitmaps(struct request_queue *q); | |
334 | #else | |
335 | static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {} | |
336 | #endif | |
337 | ||
8446fe92 | 338 | struct block_device *disk_map_sector_rcu(struct gendisk *disk, sector_t sector); |
581e2600 | 339 | |
9fc995a6 | 340 | int blk_alloc_devt(struct block_device *part, dev_t *devt); |
581e2600 | 341 | void blk_free_devt(dev_t devt); |
581e2600 CH |
342 | char *disk_name(struct gendisk *hd, int partno, char *buf); |
343 | #define ADDPART_FLAG_NONE 0 | |
344 | #define ADDPART_FLAG_RAID 1 | |
345 | #define ADDPART_FLAG_WHOLEDISK 2 | |
0d02129e | 346 | void delete_partition(struct block_device *part); |
fa9156ae CH |
347 | int bdev_add_partition(struct block_device *bdev, int partno, |
348 | sector_t start, sector_t length); | |
349 | int bdev_del_partition(struct block_device *bdev, int partno); | |
350 | int bdev_resize_partition(struct block_device *bdev, int partno, | |
351 | sector_t start, sector_t length); | |
581e2600 | 352 | int disk_expand_part_tbl(struct gendisk *disk, int target); |
581e2600 | 353 | |
e4581105 | 354 | int bio_add_hw_page(struct request_queue *q, struct bio *bio, |
130879f1 | 355 | struct page *page, unsigned int len, unsigned int offset, |
e4581105 | 356 | unsigned int max_sectors, bool *same_page); |
130879f1 | 357 | |
bc9fcbf9 | 358 | #endif /* BLK_INTERNAL_H */ |