]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * 2.5 block I/O model | |
3 | * | |
4 | * Copyright (C) 2001 Jens Axboe <axboe@suse.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
7cc01581 | 12 | * |
1da177e4 LT |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public Licens | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- | |
19 | */ | |
20 | #ifndef __LINUX_BIO_H | |
21 | #define __LINUX_BIO_H | |
22 | ||
23 | #include <linux/highmem.h> | |
24 | #include <linux/mempool.h> | |
22e2c507 | 25 | #include <linux/ioprio.h> |
1da177e4 | 26 | |
02a5e0ac DH |
27 | #ifdef CONFIG_BLOCK |
28 | ||
1da177e4 LT |
29 | #include <asm/io.h> |
30 | ||
7cc01581 TH |
31 | /* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */ |
32 | #include <linux/blk_types.h> | |
33 | ||
1da177e4 LT |
34 | #define BIO_DEBUG |
35 | ||
36 | #ifdef BIO_DEBUG | |
37 | #define BIO_BUG_ON BUG_ON | |
38 | #else | |
39 | #define BIO_BUG_ON | |
40 | #endif | |
41 | ||
d84a8477 | 42 | #define BIO_MAX_PAGES 256 |
1da177e4 LT |
43 | #define BIO_MAX_SIZE (BIO_MAX_PAGES << PAGE_CACHE_SHIFT) |
44 | #define BIO_MAX_SECTORS (BIO_MAX_SIZE >> 9) | |
45 | ||
22e2c507 JA |
46 | /* |
47 | * upper 16 bits of bi_rw define the io priority of this bio | |
48 | */ | |
49 | #define BIO_PRIO_SHIFT (8 * sizeof(unsigned long) - IOPRIO_BITS) | |
50 | #define bio_prio(bio) ((bio)->bi_rw >> BIO_PRIO_SHIFT) | |
51 | #define bio_prio_valid(bio) ioprio_valid(bio_prio(bio)) | |
52 | ||
53 | #define bio_set_prio(bio, prio) do { \ | |
54 | WARN_ON(prio >= (1 << IOPRIO_BITS)); \ | |
55 | (bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1); \ | |
56 | (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT); \ | |
57 | } while (0) | |
58 | ||
1da177e4 LT |
59 | /* |
60 | * various member access, note that bio_data should of course not be used | |
61 | * on highmem page vectors | |
62 | */ | |
63 | #define bio_iovec_idx(bio, idx) (&((bio)->bi_io_vec[(idx)])) | |
64 | #define bio_iovec(bio) bio_iovec_idx((bio), (bio)->bi_idx) | |
65 | #define bio_page(bio) bio_iovec((bio))->bv_page | |
66 | #define bio_offset(bio) bio_iovec((bio))->bv_offset | |
67 | #define bio_segments(bio) ((bio)->bi_vcnt - (bio)->bi_idx) | |
68 | #define bio_sectors(bio) ((bio)->bi_size >> 9) | |
bf2de6f5 | 69 | |
2e46e8b2 | 70 | static inline unsigned int bio_cur_bytes(struct bio *bio) |
bf2de6f5 JA |
71 | { |
72 | if (bio->bi_vcnt) | |
2e46e8b2 | 73 | return bio_iovec(bio)->bv_len; |
fb2dce86 | 74 | else /* dataless requests such as discard */ |
2e46e8b2 | 75 | return bio->bi_size; |
bf2de6f5 JA |
76 | } |
77 | ||
78 | static inline void *bio_data(struct bio *bio) | |
79 | { | |
80 | if (bio->bi_vcnt) | |
81 | return page_address(bio_page(bio)) + bio_offset(bio); | |
82 | ||
83 | return NULL; | |
84 | } | |
1da177e4 | 85 | |
392ddc32 JA |
86 | static inline int bio_has_allocated_vec(struct bio *bio) |
87 | { | |
88 | return bio->bi_io_vec && bio->bi_io_vec != bio->bi_inline_vecs; | |
89 | } | |
90 | ||
1da177e4 LT |
91 | /* |
92 | * will die | |
93 | */ | |
94 | #define bio_to_phys(bio) (page_to_phys(bio_page((bio))) + (unsigned long) bio_offset((bio))) | |
95 | #define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset) | |
96 | ||
97 | /* | |
98 | * queues that have highmem support enabled may still need to revert to | |
99 | * PIO transfers occasionally and thus map high pages temporarily. For | |
100 | * permanent PIO fall back, user is probably better off disabling highmem | |
101 | * I/O completely on that queue (see ide-dma for example) | |
102 | */ | |
103 | #define __bio_kmap_atomic(bio, idx, kmtype) \ | |
104 | (kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page, kmtype) + \ | |
105 | bio_iovec_idx((bio), (idx))->bv_offset) | |
106 | ||
107 | #define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr, kmtype) | |
108 | ||
109 | /* | |
110 | * merge helpers etc | |
111 | */ | |
112 | ||
113 | #define __BVEC_END(bio) bio_iovec_idx((bio), (bio)->bi_vcnt - 1) | |
114 | #define __BVEC_START(bio) bio_iovec_idx((bio), (bio)->bi_idx) | |
115 | ||
f92131c3 JF |
116 | /* Default implementation of BIOVEC_PHYS_MERGEABLE */ |
117 | #define __BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ | |
118 | ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) | |
119 | ||
1da177e4 LT |
120 | /* |
121 | * allow arch override, for eg virtualized architectures (put in asm/io.h) | |
122 | */ | |
123 | #ifndef BIOVEC_PHYS_MERGEABLE | |
124 | #define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ | |
f92131c3 | 125 | __BIOVEC_PHYS_MERGEABLE(vec1, vec2) |
1da177e4 LT |
126 | #endif |
127 | ||
1da177e4 LT |
128 | #define __BIO_SEG_BOUNDARY(addr1, addr2, mask) \ |
129 | (((addr1) | (mask)) == (((addr2) - 1) | (mask))) | |
130 | #define BIOVEC_SEG_BOUNDARY(q, b1, b2) \ | |
ae03bf63 | 131 | __BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, queue_segment_boundary((q))) |
1da177e4 LT |
132 | #define BIO_SEG_BOUNDARY(q, b1, b2) \ |
133 | BIOVEC_SEG_BOUNDARY((q), __BVEC_END((b1)), __BVEC_START((b2))) | |
134 | ||
6712ecf8 | 135 | #define bio_io_error(bio) bio_endio((bio), -EIO) |
1da177e4 LT |
136 | |
137 | /* | |
138 | * drivers should not use the __ version unless they _really_ want to | |
139 | * run through the entire bio and not just pending pieces | |
140 | */ | |
141 | #define __bio_for_each_segment(bvl, bio, i, start_idx) \ | |
142 | for (bvl = bio_iovec_idx((bio), (start_idx)), i = (start_idx); \ | |
143 | i < (bio)->bi_vcnt; \ | |
144 | bvl++, i++) | |
145 | ||
146 | #define bio_for_each_segment(bvl, bio, i) \ | |
147 | __bio_for_each_segment(bvl, bio, i, (bio)->bi_idx) | |
148 | ||
149 | /* | |
150 | * get a reference to a bio, so it won't disappear. the intended use is | |
151 | * something like: | |
152 | * | |
153 | * bio_get(bio); | |
154 | * submit_bio(rw, bio); | |
155 | * if (bio->bi_flags ...) | |
156 | * do_something | |
157 | * bio_put(bio); | |
158 | * | |
159 | * without the bio_get(), it could potentially complete I/O before submit_bio | |
160 | * returns. and then bio would be freed memory when if (bio->bi_flags ...) | |
161 | * runs | |
162 | */ | |
163 | #define bio_get(bio) atomic_inc(&(bio)->bi_cnt) | |
164 | ||
7ba1ba12 MP |
165 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
166 | /* | |
167 | * bio integrity payload | |
168 | */ | |
169 | struct bio_integrity_payload { | |
170 | struct bio *bip_bio; /* parent bio */ | |
7ba1ba12 MP |
171 | |
172 | sector_t bip_sector; /* virtual start sector */ | |
173 | ||
174 | void *bip_buf; /* generated integrity data */ | |
175 | bio_end_io_t *bip_end_io; /* saved I/O completion fn */ | |
176 | ||
7ba1ba12 MP |
177 | unsigned int bip_size; |
178 | ||
7878cba9 | 179 | unsigned short bip_slab; /* slab the bip came from */ |
7ba1ba12 MP |
180 | unsigned short bip_vcnt; /* # of integrity bio_vecs */ |
181 | unsigned short bip_idx; /* current bip_vec index */ | |
182 | ||
183 | struct work_struct bip_work; /* I/O completion */ | |
7878cba9 | 184 | struct bio_vec bip_vec[0]; /* embedded bvec array */ |
7ba1ba12 MP |
185 | }; |
186 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
1da177e4 LT |
187 | |
188 | /* | |
189 | * A bio_pair is used when we need to split a bio. | |
190 | * This can only happen for a bio that refers to just one | |
191 | * page of data, and in the unusual situation when the | |
192 | * page crosses a chunk/device boundary | |
193 | * | |
194 | * The address of the master bio is stored in bio1.bi_private | |
195 | * The address of the pool the pair was allocated from is stored | |
196 | * in bio2.bi_private | |
197 | */ | |
198 | struct bio_pair { | |
7ba1ba12 MP |
199 | struct bio bio1, bio2; |
200 | struct bio_vec bv1, bv2; | |
201 | #if defined(CONFIG_BLK_DEV_INTEGRITY) | |
202 | struct bio_integrity_payload bip1, bip2; | |
203 | struct bio_vec iv1, iv2; | |
204 | #endif | |
205 | atomic_t cnt; | |
206 | int error; | |
1da177e4 | 207 | }; |
6feef531 | 208 | extern struct bio_pair *bio_split(struct bio *bi, int first_sectors); |
1da177e4 LT |
209 | extern void bio_pair_release(struct bio_pair *dbio); |
210 | ||
bb799ca0 | 211 | extern struct bio_set *bioset_create(unsigned int, unsigned int); |
1da177e4 LT |
212 | extern void bioset_free(struct bio_set *); |
213 | ||
dd0fc66f | 214 | extern struct bio *bio_alloc(gfp_t, int); |
0a0d96b0 | 215 | extern struct bio *bio_kmalloc(gfp_t, int); |
dd0fc66f | 216 | extern struct bio *bio_alloc_bioset(gfp_t, int, struct bio_set *); |
1da177e4 | 217 | extern void bio_put(struct bio *); |
3676347a | 218 | extern void bio_free(struct bio *, struct bio_set *); |
1da177e4 | 219 | |
6712ecf8 | 220 | extern void bio_endio(struct bio *, int); |
1da177e4 LT |
221 | struct request_queue; |
222 | extern int bio_phys_segments(struct request_queue *, struct bio *); | |
1da177e4 LT |
223 | |
224 | extern void __bio_clone(struct bio *, struct bio *); | |
dd0fc66f | 225 | extern struct bio *bio_clone(struct bio *, gfp_t); |
1da177e4 LT |
226 | |
227 | extern void bio_init(struct bio *); | |
228 | ||
229 | extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int); | |
6e68af66 MC |
230 | extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *, |
231 | unsigned int, unsigned int); | |
1da177e4 | 232 | extern int bio_get_nr_vecs(struct block_device *); |
ad3316bf | 233 | extern sector_t bio_sector_offset(struct bio *, unsigned short, unsigned int); |
1da177e4 | 234 | extern struct bio *bio_map_user(struct request_queue *, struct block_device *, |
a3bce90e | 235 | unsigned long, unsigned int, int, gfp_t); |
f1970baf | 236 | struct sg_iovec; |
152e283f | 237 | struct rq_map_data; |
f1970baf JB |
238 | extern struct bio *bio_map_user_iov(struct request_queue *, |
239 | struct block_device *, | |
a3bce90e | 240 | struct sg_iovec *, int, int, gfp_t); |
1da177e4 | 241 | extern void bio_unmap_user(struct bio *); |
df46b9a4 | 242 | extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int, |
27496a8c | 243 | gfp_t); |
68154e90 FT |
244 | extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int, |
245 | gfp_t, int); | |
1da177e4 LT |
246 | extern void bio_set_pages_dirty(struct bio *bio); |
247 | extern void bio_check_pages_dirty(struct bio *bio); | |
2d4dc890 IL |
248 | |
249 | #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE | |
250 | # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform" | |
251 | #endif | |
252 | #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE | |
253 | extern void bio_flush_dcache_pages(struct bio *bi); | |
254 | #else | |
255 | static inline void bio_flush_dcache_pages(struct bio *bi) | |
256 | { | |
257 | } | |
258 | #endif | |
259 | ||
152e283f FT |
260 | extern struct bio *bio_copy_user(struct request_queue *, struct rq_map_data *, |
261 | unsigned long, unsigned int, int, gfp_t); | |
262 | extern struct bio *bio_copy_user_iov(struct request_queue *, | |
263 | struct rq_map_data *, struct sg_iovec *, | |
a3bce90e | 264 | int, int, gfp_t); |
1da177e4 LT |
265 | extern int bio_uncopy_user(struct bio *); |
266 | void zero_fill_bio(struct bio *bio); | |
51d654e1 | 267 | extern struct bio_vec *bvec_alloc_bs(gfp_t, int, unsigned long *, struct bio_set *); |
bb799ca0 | 268 | extern void bvec_free_bs(struct bio_set *, struct bio_vec *, unsigned int); |
7ba1ba12 | 269 | extern unsigned int bvec_nr_vecs(unsigned short idx); |
51d654e1 | 270 | |
c7c22e4d JA |
271 | /* |
272 | * Allow queuer to specify a completion CPU for this bio | |
273 | */ | |
274 | static inline void bio_set_completion_cpu(struct bio *bio, unsigned int cpu) | |
275 | { | |
276 | bio->bi_comp_cpu = cpu; | |
277 | } | |
278 | ||
51d654e1 MP |
279 | /* |
280 | * bio_set is used to allow other portions of the IO system to | |
281 | * allocate their own private memory pools for bio and iovec structures. | |
282 | * These memory pools in turn all allocate from the bio_slab | |
283 | * and the bvec_slabs[]. | |
284 | */ | |
285 | #define BIO_POOL_SIZE 2 | |
286 | #define BIOVEC_NR_POOLS 6 | |
7ff9345f | 287 | #define BIOVEC_MAX_IDX (BIOVEC_NR_POOLS - 1) |
51d654e1 MP |
288 | |
289 | struct bio_set { | |
1b434498 | 290 | struct kmem_cache *bio_slab; |
bb799ca0 JA |
291 | unsigned int front_pad; |
292 | ||
51d654e1 | 293 | mempool_t *bio_pool; |
7878cba9 MP |
294 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
295 | mempool_t *bio_integrity_pool; | |
296 | #endif | |
7ff9345f | 297 | mempool_t *bvec_pool; |
51d654e1 MP |
298 | }; |
299 | ||
300 | struct biovec_slab { | |
301 | int nr_vecs; | |
302 | char *name; | |
303 | struct kmem_cache *slab; | |
304 | }; | |
305 | ||
306 | extern struct bio_set *fs_bio_set; | |
bb799ca0 | 307 | extern struct biovec_slab bvec_slabs[BIOVEC_NR_POOLS] __read_mostly; |
51d654e1 MP |
308 | |
309 | /* | |
310 | * a small number of entries is fine, not going to be performance critical. | |
311 | * basically we just need to survive | |
312 | */ | |
313 | #define BIO_SPLIT_ENTRIES 2 | |
1da177e4 LT |
314 | |
315 | #ifdef CONFIG_HIGHMEM | |
316 | /* | |
20b636bf AB |
317 | * remember never ever reenable interrupts between a bvec_kmap_irq and |
318 | * bvec_kunmap_irq! | |
1da177e4 | 319 | */ |
4f570f99 | 320 | static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags) |
1da177e4 LT |
321 | { |
322 | unsigned long addr; | |
323 | ||
324 | /* | |
325 | * might not be a highmem page, but the preempt/irq count | |
326 | * balancing is a lot nicer this way | |
327 | */ | |
328 | local_irq_save(*flags); | |
329 | addr = (unsigned long) kmap_atomic(bvec->bv_page, KM_BIO_SRC_IRQ); | |
330 | ||
331 | BUG_ON(addr & ~PAGE_MASK); | |
332 | ||
333 | return (char *) addr + bvec->bv_offset; | |
334 | } | |
335 | ||
4f570f99 | 336 | static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags) |
1da177e4 LT |
337 | { |
338 | unsigned long ptr = (unsigned long) buffer & PAGE_MASK; | |
339 | ||
340 | kunmap_atomic((void *) ptr, KM_BIO_SRC_IRQ); | |
341 | local_irq_restore(*flags); | |
342 | } | |
343 | ||
344 | #else | |
11a691be GU |
345 | static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags) |
346 | { | |
347 | return page_address(bvec->bv_page) + bvec->bv_offset; | |
348 | } | |
349 | ||
350 | static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags) | |
351 | { | |
352 | *flags = 0; | |
353 | } | |
1da177e4 LT |
354 | #endif |
355 | ||
c2d08dad | 356 | static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx, |
1da177e4 LT |
357 | unsigned long *flags) |
358 | { | |
359 | return bvec_kmap_irq(bio_iovec_idx(bio, idx), flags); | |
360 | } | |
361 | #define __bio_kunmap_irq(buf, flags) bvec_kunmap_irq(buf, flags) | |
362 | ||
363 | #define bio_kmap_irq(bio, flags) \ | |
364 | __bio_kmap_irq((bio), (bio)->bi_idx, (flags)) | |
365 | #define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags) | |
366 | ||
7a67f63b JA |
367 | /* |
368 | * Check whether this bio carries any data or not. A NULL bio is allowed. | |
369 | */ | |
370 | static inline int bio_has_data(struct bio *bio) | |
371 | { | |
372 | return bio && bio->bi_io_vec != NULL; | |
373 | } | |
374 | ||
8f3d8ba2 | 375 | /* |
e686307f | 376 | * BIO list management for use by remapping drivers (e.g. DM or MD) and loop. |
8f3d8ba2 CH |
377 | * |
378 | * A bio_list anchors a singly-linked list of bios chained through the bi_next | |
379 | * member of the bio. The bio_list also caches the last list member to allow | |
380 | * fast access to the tail. | |
381 | */ | |
382 | struct bio_list { | |
383 | struct bio *head; | |
384 | struct bio *tail; | |
385 | }; | |
386 | ||
387 | static inline int bio_list_empty(const struct bio_list *bl) | |
388 | { | |
389 | return bl->head == NULL; | |
390 | } | |
391 | ||
392 | static inline void bio_list_init(struct bio_list *bl) | |
393 | { | |
394 | bl->head = bl->tail = NULL; | |
395 | } | |
396 | ||
397 | #define bio_list_for_each(bio, bl) \ | |
398 | for (bio = (bl)->head; bio; bio = bio->bi_next) | |
399 | ||
400 | static inline unsigned bio_list_size(const struct bio_list *bl) | |
401 | { | |
402 | unsigned sz = 0; | |
403 | struct bio *bio; | |
404 | ||
405 | bio_list_for_each(bio, bl) | |
406 | sz++; | |
407 | ||
408 | return sz; | |
409 | } | |
410 | ||
411 | static inline void bio_list_add(struct bio_list *bl, struct bio *bio) | |
412 | { | |
413 | bio->bi_next = NULL; | |
414 | ||
415 | if (bl->tail) | |
416 | bl->tail->bi_next = bio; | |
417 | else | |
418 | bl->head = bio; | |
419 | ||
420 | bl->tail = bio; | |
421 | } | |
422 | ||
423 | static inline void bio_list_add_head(struct bio_list *bl, struct bio *bio) | |
424 | { | |
425 | bio->bi_next = bl->head; | |
426 | ||
427 | bl->head = bio; | |
428 | ||
429 | if (!bl->tail) | |
430 | bl->tail = bio; | |
431 | } | |
432 | ||
433 | static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2) | |
434 | { | |
435 | if (!bl2->head) | |
436 | return; | |
437 | ||
438 | if (bl->tail) | |
439 | bl->tail->bi_next = bl2->head; | |
440 | else | |
441 | bl->head = bl2->head; | |
442 | ||
443 | bl->tail = bl2->tail; | |
444 | } | |
445 | ||
446 | static inline void bio_list_merge_head(struct bio_list *bl, | |
447 | struct bio_list *bl2) | |
448 | { | |
449 | if (!bl2->head) | |
450 | return; | |
451 | ||
452 | if (bl->head) | |
453 | bl2->tail->bi_next = bl->head; | |
454 | else | |
455 | bl->tail = bl2->tail; | |
456 | ||
457 | bl->head = bl2->head; | |
458 | } | |
459 | ||
13685a16 GU |
460 | static inline struct bio *bio_list_peek(struct bio_list *bl) |
461 | { | |
462 | return bl->head; | |
463 | } | |
464 | ||
8f3d8ba2 CH |
465 | static inline struct bio *bio_list_pop(struct bio_list *bl) |
466 | { | |
467 | struct bio *bio = bl->head; | |
468 | ||
469 | if (bio) { | |
470 | bl->head = bl->head->bi_next; | |
471 | if (!bl->head) | |
472 | bl->tail = NULL; | |
473 | ||
474 | bio->bi_next = NULL; | |
475 | } | |
476 | ||
477 | return bio; | |
478 | } | |
479 | ||
480 | static inline struct bio *bio_list_get(struct bio_list *bl) | |
481 | { | |
482 | struct bio *bio = bl->head; | |
483 | ||
484 | bl->head = bl->tail = NULL; | |
485 | ||
486 | return bio; | |
487 | } | |
488 | ||
7ba1ba12 MP |
489 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
490 | ||
491 | #define bip_vec_idx(bip, idx) (&(bip->bip_vec[(idx)])) | |
492 | #define bip_vec(bip) bip_vec_idx(bip, 0) | |
493 | ||
494 | #define __bip_for_each_vec(bvl, bip, i, start_idx) \ | |
495 | for (bvl = bip_vec_idx((bip), (start_idx)), i = (start_idx); \ | |
496 | i < (bip)->bip_vcnt; \ | |
497 | bvl++, i++) | |
498 | ||
499 | #define bip_for_each_vec(bvl, bip, i) \ | |
500 | __bip_for_each_vec(bvl, bip, i, (bip)->bip_idx) | |
501 | ||
13f05c8d MP |
502 | #define bio_for_each_integrity_vec(_bvl, _bio, _iter) \ |
503 | for_each_bio(_bio) \ | |
504 | bip_for_each_vec(_bvl, _bio->bi_integrity, _iter) | |
505 | ||
8deaf721 | 506 | #define bio_integrity(bio) (bio->bi_integrity != NULL) |
7ba1ba12 | 507 | |
7878cba9 | 508 | extern struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *, gfp_t, unsigned int, struct bio_set *); |
7ba1ba12 | 509 | extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int); |
7878cba9 | 510 | extern void bio_integrity_free(struct bio *, struct bio_set *); |
7ba1ba12 MP |
511 | extern int bio_integrity_add_page(struct bio *, struct page *, unsigned int, unsigned int); |
512 | extern int bio_integrity_enabled(struct bio *bio); | |
513 | extern int bio_integrity_set_tag(struct bio *, void *, unsigned int); | |
514 | extern int bio_integrity_get_tag(struct bio *, void *, unsigned int); | |
515 | extern int bio_integrity_prep(struct bio *); | |
516 | extern void bio_integrity_endio(struct bio *, int); | |
517 | extern void bio_integrity_advance(struct bio *, unsigned int); | |
518 | extern void bio_integrity_trim(struct bio *, unsigned int, unsigned int); | |
519 | extern void bio_integrity_split(struct bio *, struct bio_pair *, int); | |
7878cba9 MP |
520 | extern int bio_integrity_clone(struct bio *, struct bio *, gfp_t, struct bio_set *); |
521 | extern int bioset_integrity_create(struct bio_set *, int); | |
522 | extern void bioset_integrity_free(struct bio_set *); | |
523 | extern void bio_integrity_init(void); | |
7ba1ba12 MP |
524 | |
525 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
526 | ||
527 | #define bio_integrity(a) (0) | |
7878cba9 | 528 | #define bioset_integrity_create(a, b) (0) |
7ba1ba12 MP |
529 | #define bio_integrity_prep(a) (0) |
530 | #define bio_integrity_enabled(a) (0) | |
7878cba9 MP |
531 | #define bio_integrity_clone(a, b, c, d) (0) |
532 | #define bioset_integrity_free(a) do { } while (0) | |
533 | #define bio_integrity_free(a, b) do { } while (0) | |
7ba1ba12 MP |
534 | #define bio_integrity_endio(a, b) do { } while (0) |
535 | #define bio_integrity_advance(a, b) do { } while (0) | |
536 | #define bio_integrity_trim(a, b, c) do { } while (0) | |
537 | #define bio_integrity_split(a, b, c) do { } while (0) | |
538 | #define bio_integrity_set_tag(a, b, c) do { } while (0) | |
539 | #define bio_integrity_get_tag(a, b, c) do { } while (0) | |
7878cba9 | 540 | #define bio_integrity_init(a) do { } while (0) |
7ba1ba12 MP |
541 | |
542 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
543 | ||
02a5e0ac | 544 | #endif /* CONFIG_BLOCK */ |
1da177e4 | 545 | #endif /* __LINUX_BIO_H */ |