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) | |
7b6d91da CH |
69 | #define bio_empty_barrier(bio) \ |
70 | ((bio->bi_rw & REQ_HARDBARRIER) && \ | |
71 | !bio_has_data(bio) && \ | |
72 | !(bio->bi_rw & REQ_DISCARD)) | |
bf2de6f5 | 73 | |
2e46e8b2 | 74 | static inline unsigned int bio_cur_bytes(struct bio *bio) |
bf2de6f5 JA |
75 | { |
76 | if (bio->bi_vcnt) | |
2e46e8b2 | 77 | return bio_iovec(bio)->bv_len; |
fb2dce86 | 78 | else /* dataless requests such as discard */ |
2e46e8b2 | 79 | return bio->bi_size; |
bf2de6f5 JA |
80 | } |
81 | ||
82 | static inline void *bio_data(struct bio *bio) | |
83 | { | |
84 | if (bio->bi_vcnt) | |
85 | return page_address(bio_page(bio)) + bio_offset(bio); | |
86 | ||
87 | return NULL; | |
88 | } | |
1da177e4 | 89 | |
392ddc32 JA |
90 | static inline int bio_has_allocated_vec(struct bio *bio) |
91 | { | |
92 | return bio->bi_io_vec && bio->bi_io_vec != bio->bi_inline_vecs; | |
93 | } | |
94 | ||
1da177e4 LT |
95 | /* |
96 | * will die | |
97 | */ | |
98 | #define bio_to_phys(bio) (page_to_phys(bio_page((bio))) + (unsigned long) bio_offset((bio))) | |
99 | #define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset) | |
100 | ||
101 | /* | |
102 | * queues that have highmem support enabled may still need to revert to | |
103 | * PIO transfers occasionally and thus map high pages temporarily. For | |
104 | * permanent PIO fall back, user is probably better off disabling highmem | |
105 | * I/O completely on that queue (see ide-dma for example) | |
106 | */ | |
107 | #define __bio_kmap_atomic(bio, idx, kmtype) \ | |
108 | (kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page, kmtype) + \ | |
109 | bio_iovec_idx((bio), (idx))->bv_offset) | |
110 | ||
111 | #define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr, kmtype) | |
112 | ||
113 | /* | |
114 | * merge helpers etc | |
115 | */ | |
116 | ||
117 | #define __BVEC_END(bio) bio_iovec_idx((bio), (bio)->bi_vcnt - 1) | |
118 | #define __BVEC_START(bio) bio_iovec_idx((bio), (bio)->bi_idx) | |
119 | ||
f92131c3 JF |
120 | /* Default implementation of BIOVEC_PHYS_MERGEABLE */ |
121 | #define __BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ | |
122 | ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * allow arch override, for eg virtualized architectures (put in asm/io.h) | |
126 | */ | |
127 | #ifndef BIOVEC_PHYS_MERGEABLE | |
128 | #define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ | |
f92131c3 | 129 | __BIOVEC_PHYS_MERGEABLE(vec1, vec2) |
1da177e4 LT |
130 | #endif |
131 | ||
1da177e4 LT |
132 | #define __BIO_SEG_BOUNDARY(addr1, addr2, mask) \ |
133 | (((addr1) | (mask)) == (((addr2) - 1) | (mask))) | |
134 | #define BIOVEC_SEG_BOUNDARY(q, b1, b2) \ | |
ae03bf63 | 135 | __BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, queue_segment_boundary((q))) |
1da177e4 LT |
136 | #define BIO_SEG_BOUNDARY(q, b1, b2) \ |
137 | BIOVEC_SEG_BOUNDARY((q), __BVEC_END((b1)), __BVEC_START((b2))) | |
138 | ||
6712ecf8 | 139 | #define bio_io_error(bio) bio_endio((bio), -EIO) |
1da177e4 LT |
140 | |
141 | /* | |
142 | * drivers should not use the __ version unless they _really_ want to | |
143 | * run through the entire bio and not just pending pieces | |
144 | */ | |
145 | #define __bio_for_each_segment(bvl, bio, i, start_idx) \ | |
146 | for (bvl = bio_iovec_idx((bio), (start_idx)), i = (start_idx); \ | |
147 | i < (bio)->bi_vcnt; \ | |
148 | bvl++, i++) | |
149 | ||
150 | #define bio_for_each_segment(bvl, bio, i) \ | |
151 | __bio_for_each_segment(bvl, bio, i, (bio)->bi_idx) | |
152 | ||
153 | /* | |
154 | * get a reference to a bio, so it won't disappear. the intended use is | |
155 | * something like: | |
156 | * | |
157 | * bio_get(bio); | |
158 | * submit_bio(rw, bio); | |
159 | * if (bio->bi_flags ...) | |
160 | * do_something | |
161 | * bio_put(bio); | |
162 | * | |
163 | * without the bio_get(), it could potentially complete I/O before submit_bio | |
164 | * returns. and then bio would be freed memory when if (bio->bi_flags ...) | |
165 | * runs | |
166 | */ | |
167 | #define bio_get(bio) atomic_inc(&(bio)->bi_cnt) | |
168 | ||
7ba1ba12 MP |
169 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
170 | /* | |
171 | * bio integrity payload | |
172 | */ | |
173 | struct bio_integrity_payload { | |
174 | struct bio *bip_bio; /* parent bio */ | |
7ba1ba12 MP |
175 | |
176 | sector_t bip_sector; /* virtual start sector */ | |
177 | ||
178 | void *bip_buf; /* generated integrity data */ | |
179 | bio_end_io_t *bip_end_io; /* saved I/O completion fn */ | |
180 | ||
7ba1ba12 MP |
181 | unsigned int bip_size; |
182 | ||
7878cba9 | 183 | unsigned short bip_slab; /* slab the bip came from */ |
7ba1ba12 MP |
184 | unsigned short bip_vcnt; /* # of integrity bio_vecs */ |
185 | unsigned short bip_idx; /* current bip_vec index */ | |
186 | ||
187 | struct work_struct bip_work; /* I/O completion */ | |
7878cba9 | 188 | struct bio_vec bip_vec[0]; /* embedded bvec array */ |
7ba1ba12 MP |
189 | }; |
190 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
1da177e4 LT |
191 | |
192 | /* | |
193 | * A bio_pair is used when we need to split a bio. | |
194 | * This can only happen for a bio that refers to just one | |
195 | * page of data, and in the unusual situation when the | |
196 | * page crosses a chunk/device boundary | |
197 | * | |
198 | * The address of the master bio is stored in bio1.bi_private | |
199 | * The address of the pool the pair was allocated from is stored | |
200 | * in bio2.bi_private | |
201 | */ | |
202 | struct bio_pair { | |
7ba1ba12 MP |
203 | struct bio bio1, bio2; |
204 | struct bio_vec bv1, bv2; | |
205 | #if defined(CONFIG_BLK_DEV_INTEGRITY) | |
206 | struct bio_integrity_payload bip1, bip2; | |
207 | struct bio_vec iv1, iv2; | |
208 | #endif | |
209 | atomic_t cnt; | |
210 | int error; | |
1da177e4 | 211 | }; |
6feef531 | 212 | extern struct bio_pair *bio_split(struct bio *bi, int first_sectors); |
1da177e4 LT |
213 | extern void bio_pair_release(struct bio_pair *dbio); |
214 | ||
bb799ca0 | 215 | extern struct bio_set *bioset_create(unsigned int, unsigned int); |
1da177e4 LT |
216 | extern void bioset_free(struct bio_set *); |
217 | ||
dd0fc66f | 218 | extern struct bio *bio_alloc(gfp_t, int); |
0a0d96b0 | 219 | extern struct bio *bio_kmalloc(gfp_t, int); |
dd0fc66f | 220 | extern struct bio *bio_alloc_bioset(gfp_t, int, struct bio_set *); |
1da177e4 | 221 | extern void bio_put(struct bio *); |
3676347a | 222 | extern void bio_free(struct bio *, struct bio_set *); |
1da177e4 | 223 | |
6712ecf8 | 224 | extern void bio_endio(struct bio *, int); |
1da177e4 LT |
225 | struct request_queue; |
226 | extern int bio_phys_segments(struct request_queue *, struct bio *); | |
1da177e4 LT |
227 | |
228 | extern void __bio_clone(struct bio *, struct bio *); | |
dd0fc66f | 229 | extern struct bio *bio_clone(struct bio *, gfp_t); |
1da177e4 LT |
230 | |
231 | extern void bio_init(struct bio *); | |
232 | ||
233 | extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int); | |
6e68af66 MC |
234 | extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *, |
235 | unsigned int, unsigned int); | |
1da177e4 | 236 | extern int bio_get_nr_vecs(struct block_device *); |
ad3316bf | 237 | extern sector_t bio_sector_offset(struct bio *, unsigned short, unsigned int); |
1da177e4 | 238 | extern struct bio *bio_map_user(struct request_queue *, struct block_device *, |
a3bce90e | 239 | unsigned long, unsigned int, int, gfp_t); |
f1970baf | 240 | struct sg_iovec; |
152e283f | 241 | struct rq_map_data; |
f1970baf JB |
242 | extern struct bio *bio_map_user_iov(struct request_queue *, |
243 | struct block_device *, | |
a3bce90e | 244 | struct sg_iovec *, int, int, gfp_t); |
1da177e4 | 245 | extern void bio_unmap_user(struct bio *); |
df46b9a4 | 246 | extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int, |
27496a8c | 247 | gfp_t); |
68154e90 FT |
248 | extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int, |
249 | gfp_t, int); | |
1da177e4 LT |
250 | extern void bio_set_pages_dirty(struct bio *bio); |
251 | extern void bio_check_pages_dirty(struct bio *bio); | |
2d4dc890 IL |
252 | |
253 | #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE | |
254 | # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform" | |
255 | #endif | |
256 | #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE | |
257 | extern void bio_flush_dcache_pages(struct bio *bi); | |
258 | #else | |
259 | static inline void bio_flush_dcache_pages(struct bio *bi) | |
260 | { | |
261 | } | |
262 | #endif | |
263 | ||
152e283f FT |
264 | extern struct bio *bio_copy_user(struct request_queue *, struct rq_map_data *, |
265 | unsigned long, unsigned int, int, gfp_t); | |
266 | extern struct bio *bio_copy_user_iov(struct request_queue *, | |
267 | struct rq_map_data *, struct sg_iovec *, | |
a3bce90e | 268 | int, int, gfp_t); |
1da177e4 LT |
269 | extern int bio_uncopy_user(struct bio *); |
270 | void zero_fill_bio(struct bio *bio); | |
51d654e1 | 271 | extern struct bio_vec *bvec_alloc_bs(gfp_t, int, unsigned long *, struct bio_set *); |
bb799ca0 | 272 | extern void bvec_free_bs(struct bio_set *, struct bio_vec *, unsigned int); |
7ba1ba12 | 273 | extern unsigned int bvec_nr_vecs(unsigned short idx); |
51d654e1 | 274 | |
c7c22e4d JA |
275 | /* |
276 | * Allow queuer to specify a completion CPU for this bio | |
277 | */ | |
278 | static inline void bio_set_completion_cpu(struct bio *bio, unsigned int cpu) | |
279 | { | |
280 | bio->bi_comp_cpu = cpu; | |
281 | } | |
282 | ||
51d654e1 MP |
283 | /* |
284 | * bio_set is used to allow other portions of the IO system to | |
285 | * allocate their own private memory pools for bio and iovec structures. | |
286 | * These memory pools in turn all allocate from the bio_slab | |
287 | * and the bvec_slabs[]. | |
288 | */ | |
289 | #define BIO_POOL_SIZE 2 | |
290 | #define BIOVEC_NR_POOLS 6 | |
7ff9345f | 291 | #define BIOVEC_MAX_IDX (BIOVEC_NR_POOLS - 1) |
51d654e1 MP |
292 | |
293 | struct bio_set { | |
1b434498 | 294 | struct kmem_cache *bio_slab; |
bb799ca0 JA |
295 | unsigned int front_pad; |
296 | ||
51d654e1 | 297 | mempool_t *bio_pool; |
7878cba9 MP |
298 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
299 | mempool_t *bio_integrity_pool; | |
300 | #endif | |
7ff9345f | 301 | mempool_t *bvec_pool; |
51d654e1 MP |
302 | }; |
303 | ||
304 | struct biovec_slab { | |
305 | int nr_vecs; | |
306 | char *name; | |
307 | struct kmem_cache *slab; | |
308 | }; | |
309 | ||
310 | extern struct bio_set *fs_bio_set; | |
bb799ca0 | 311 | extern struct biovec_slab bvec_slabs[BIOVEC_NR_POOLS] __read_mostly; |
51d654e1 MP |
312 | |
313 | /* | |
314 | * a small number of entries is fine, not going to be performance critical. | |
315 | * basically we just need to survive | |
316 | */ | |
317 | #define BIO_SPLIT_ENTRIES 2 | |
1da177e4 LT |
318 | |
319 | #ifdef CONFIG_HIGHMEM | |
320 | /* | |
20b636bf AB |
321 | * remember never ever reenable interrupts between a bvec_kmap_irq and |
322 | * bvec_kunmap_irq! | |
1da177e4 | 323 | */ |
4f570f99 | 324 | static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags) |
1da177e4 LT |
325 | { |
326 | unsigned long addr; | |
327 | ||
328 | /* | |
329 | * might not be a highmem page, but the preempt/irq count | |
330 | * balancing is a lot nicer this way | |
331 | */ | |
332 | local_irq_save(*flags); | |
333 | addr = (unsigned long) kmap_atomic(bvec->bv_page, KM_BIO_SRC_IRQ); | |
334 | ||
335 | BUG_ON(addr & ~PAGE_MASK); | |
336 | ||
337 | return (char *) addr + bvec->bv_offset; | |
338 | } | |
339 | ||
4f570f99 | 340 | static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags) |
1da177e4 LT |
341 | { |
342 | unsigned long ptr = (unsigned long) buffer & PAGE_MASK; | |
343 | ||
344 | kunmap_atomic((void *) ptr, KM_BIO_SRC_IRQ); | |
345 | local_irq_restore(*flags); | |
346 | } | |
347 | ||
348 | #else | |
11a691be GU |
349 | static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags) |
350 | { | |
351 | return page_address(bvec->bv_page) + bvec->bv_offset; | |
352 | } | |
353 | ||
354 | static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags) | |
355 | { | |
356 | *flags = 0; | |
357 | } | |
1da177e4 LT |
358 | #endif |
359 | ||
c2d08dad | 360 | static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx, |
1da177e4 LT |
361 | unsigned long *flags) |
362 | { | |
363 | return bvec_kmap_irq(bio_iovec_idx(bio, idx), flags); | |
364 | } | |
365 | #define __bio_kunmap_irq(buf, flags) bvec_kunmap_irq(buf, flags) | |
366 | ||
367 | #define bio_kmap_irq(bio, flags) \ | |
368 | __bio_kmap_irq((bio), (bio)->bi_idx, (flags)) | |
369 | #define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags) | |
370 | ||
7a67f63b JA |
371 | /* |
372 | * Check whether this bio carries any data or not. A NULL bio is allowed. | |
373 | */ | |
374 | static inline int bio_has_data(struct bio *bio) | |
375 | { | |
376 | return bio && bio->bi_io_vec != NULL; | |
377 | } | |
378 | ||
8f3d8ba2 | 379 | /* |
e686307f | 380 | * BIO list management for use by remapping drivers (e.g. DM or MD) and loop. |
8f3d8ba2 CH |
381 | * |
382 | * A bio_list anchors a singly-linked list of bios chained through the bi_next | |
383 | * member of the bio. The bio_list also caches the last list member to allow | |
384 | * fast access to the tail. | |
385 | */ | |
386 | struct bio_list { | |
387 | struct bio *head; | |
388 | struct bio *tail; | |
389 | }; | |
390 | ||
391 | static inline int bio_list_empty(const struct bio_list *bl) | |
392 | { | |
393 | return bl->head == NULL; | |
394 | } | |
395 | ||
396 | static inline void bio_list_init(struct bio_list *bl) | |
397 | { | |
398 | bl->head = bl->tail = NULL; | |
399 | } | |
400 | ||
401 | #define bio_list_for_each(bio, bl) \ | |
402 | for (bio = (bl)->head; bio; bio = bio->bi_next) | |
403 | ||
404 | static inline unsigned bio_list_size(const struct bio_list *bl) | |
405 | { | |
406 | unsigned sz = 0; | |
407 | struct bio *bio; | |
408 | ||
409 | bio_list_for_each(bio, bl) | |
410 | sz++; | |
411 | ||
412 | return sz; | |
413 | } | |
414 | ||
415 | static inline void bio_list_add(struct bio_list *bl, struct bio *bio) | |
416 | { | |
417 | bio->bi_next = NULL; | |
418 | ||
419 | if (bl->tail) | |
420 | bl->tail->bi_next = bio; | |
421 | else | |
422 | bl->head = bio; | |
423 | ||
424 | bl->tail = bio; | |
425 | } | |
426 | ||
427 | static inline void bio_list_add_head(struct bio_list *bl, struct bio *bio) | |
428 | { | |
429 | bio->bi_next = bl->head; | |
430 | ||
431 | bl->head = bio; | |
432 | ||
433 | if (!bl->tail) | |
434 | bl->tail = bio; | |
435 | } | |
436 | ||
437 | static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2) | |
438 | { | |
439 | if (!bl2->head) | |
440 | return; | |
441 | ||
442 | if (bl->tail) | |
443 | bl->tail->bi_next = bl2->head; | |
444 | else | |
445 | bl->head = bl2->head; | |
446 | ||
447 | bl->tail = bl2->tail; | |
448 | } | |
449 | ||
450 | static inline void bio_list_merge_head(struct bio_list *bl, | |
451 | struct bio_list *bl2) | |
452 | { | |
453 | if (!bl2->head) | |
454 | return; | |
455 | ||
456 | if (bl->head) | |
457 | bl2->tail->bi_next = bl->head; | |
458 | else | |
459 | bl->tail = bl2->tail; | |
460 | ||
461 | bl->head = bl2->head; | |
462 | } | |
463 | ||
13685a16 GU |
464 | static inline struct bio *bio_list_peek(struct bio_list *bl) |
465 | { | |
466 | return bl->head; | |
467 | } | |
468 | ||
8f3d8ba2 CH |
469 | static inline struct bio *bio_list_pop(struct bio_list *bl) |
470 | { | |
471 | struct bio *bio = bl->head; | |
472 | ||
473 | if (bio) { | |
474 | bl->head = bl->head->bi_next; | |
475 | if (!bl->head) | |
476 | bl->tail = NULL; | |
477 | ||
478 | bio->bi_next = NULL; | |
479 | } | |
480 | ||
481 | return bio; | |
482 | } | |
483 | ||
484 | static inline struct bio *bio_list_get(struct bio_list *bl) | |
485 | { | |
486 | struct bio *bio = bl->head; | |
487 | ||
488 | bl->head = bl->tail = NULL; | |
489 | ||
490 | return bio; | |
491 | } | |
492 | ||
7ba1ba12 MP |
493 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
494 | ||
495 | #define bip_vec_idx(bip, idx) (&(bip->bip_vec[(idx)])) | |
496 | #define bip_vec(bip) bip_vec_idx(bip, 0) | |
497 | ||
498 | #define __bip_for_each_vec(bvl, bip, i, start_idx) \ | |
499 | for (bvl = bip_vec_idx((bip), (start_idx)), i = (start_idx); \ | |
500 | i < (bip)->bip_vcnt; \ | |
501 | bvl++, i++) | |
502 | ||
503 | #define bip_for_each_vec(bvl, bip, i) \ | |
504 | __bip_for_each_vec(bvl, bip, i, (bip)->bip_idx) | |
505 | ||
13f05c8d MP |
506 | #define bio_for_each_integrity_vec(_bvl, _bio, _iter) \ |
507 | for_each_bio(_bio) \ | |
508 | bip_for_each_vec(_bvl, _bio->bi_integrity, _iter) | |
509 | ||
8deaf721 | 510 | #define bio_integrity(bio) (bio->bi_integrity != NULL) |
7ba1ba12 | 511 | |
7878cba9 | 512 | extern struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *, gfp_t, unsigned int, struct bio_set *); |
7ba1ba12 | 513 | extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int); |
7878cba9 | 514 | extern void bio_integrity_free(struct bio *, struct bio_set *); |
7ba1ba12 MP |
515 | extern int bio_integrity_add_page(struct bio *, struct page *, unsigned int, unsigned int); |
516 | extern int bio_integrity_enabled(struct bio *bio); | |
517 | extern int bio_integrity_set_tag(struct bio *, void *, unsigned int); | |
518 | extern int bio_integrity_get_tag(struct bio *, void *, unsigned int); | |
519 | extern int bio_integrity_prep(struct bio *); | |
520 | extern void bio_integrity_endio(struct bio *, int); | |
521 | extern void bio_integrity_advance(struct bio *, unsigned int); | |
522 | extern void bio_integrity_trim(struct bio *, unsigned int, unsigned int); | |
523 | extern void bio_integrity_split(struct bio *, struct bio_pair *, int); | |
7878cba9 MP |
524 | extern int bio_integrity_clone(struct bio *, struct bio *, gfp_t, struct bio_set *); |
525 | extern int bioset_integrity_create(struct bio_set *, int); | |
526 | extern void bioset_integrity_free(struct bio_set *); | |
527 | extern void bio_integrity_init(void); | |
7ba1ba12 MP |
528 | |
529 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
530 | ||
531 | #define bio_integrity(a) (0) | |
7878cba9 | 532 | #define bioset_integrity_create(a, b) (0) |
7ba1ba12 MP |
533 | #define bio_integrity_prep(a) (0) |
534 | #define bio_integrity_enabled(a) (0) | |
7878cba9 MP |
535 | #define bio_integrity_clone(a, b, c, d) (0) |
536 | #define bioset_integrity_free(a) do { } while (0) | |
537 | #define bio_integrity_free(a, b) do { } while (0) | |
7ba1ba12 MP |
538 | #define bio_integrity_endio(a, b) do { } while (0) |
539 | #define bio_integrity_advance(a, b) do { } while (0) | |
540 | #define bio_integrity_trim(a, b, c) do { } while (0) | |
541 | #define bio_integrity_split(a, b, c) do { } while (0) | |
542 | #define bio_integrity_set_tag(a, b, c) do { } while (0) | |
543 | #define bio_integrity_get_tag(a, b, c) do { } while (0) | |
7878cba9 | 544 | #define bio_integrity_init(a) do { } while (0) |
7ba1ba12 MP |
545 | |
546 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ | |
547 | ||
02a5e0ac | 548 | #endif /* CONFIG_BLOCK */ |
1da177e4 | 549 | #endif /* __LINUX_BIO_H */ |