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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/bio.h
2 * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public Licens
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
21 #include <linux/highmem.h>
22 #include <linux/mempool.h>
23 #include <linux/ioprio.h>
24 #include <linux/bug.h>
30 /* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */
31 #include <linux/blk_types.h>
36 #define BIO_BUG_ON BUG_ON
41 #ifdef CONFIG_THP_SWAP
42 #if HPAGE_PMD_NR > 256
43 #define BIO_MAX_PAGES HPAGE_PMD_NR
45 #define BIO_MAX_PAGES 256
48 #define BIO_MAX_PAGES 256
51 #define bio_prio(bio) (bio)->bi_ioprio
52 #define bio_set_prio(bio, prio) ((bio)->bi_ioprio = prio)
54 #define bio_iter_iovec(bio, iter) \
55 bvec_iter_bvec((bio)->bi_io_vec, (iter))
57 #define bio_iter_page(bio, iter) \
58 bvec_iter_page((bio)->bi_io_vec, (iter))
59 #define bio_iter_len(bio, iter) \
60 bvec_iter_len((bio)->bi_io_vec, (iter))
61 #define bio_iter_offset(bio, iter) \
62 bvec_iter_offset((bio)->bi_io_vec, (iter))
64 #define bio_page(bio) bio_iter_page((bio), (bio)->bi_iter)
65 #define bio_offset(bio) bio_iter_offset((bio), (bio)->bi_iter)
66 #define bio_iovec(bio) bio_iter_iovec((bio), (bio)->bi_iter)
68 #define bio_multiple_segments(bio) \
69 ((bio)->bi_iter.bi_size != bio_iovec(bio).bv_len)
70 #define bio_sectors(bio) ((bio)->bi_iter.bi_size >> 9)
71 #define bio_end_sector(bio) ((bio)->bi_iter.bi_sector + bio_sectors((bio)))
74 * Return the data direction, READ or WRITE.
76 #define bio_data_dir(bio) \
77 (op_is_write(bio_op(bio)) ? WRITE : READ)
80 * Check whether this bio carries any data or not. A NULL bio is allowed.
82 static inline bool bio_has_data(struct bio
*bio
)
85 bio
->bi_iter
.bi_size
&&
86 bio_op(bio
) != REQ_OP_DISCARD
&&
87 bio_op(bio
) != REQ_OP_SECURE_ERASE
&&
88 bio_op(bio
) != REQ_OP_WRITE_ZEROES
)
94 static inline bool bio_no_advance_iter(struct bio
*bio
)
96 return bio_op(bio
) == REQ_OP_DISCARD
||
97 bio_op(bio
) == REQ_OP_SECURE_ERASE
||
98 bio_op(bio
) == REQ_OP_WRITE_SAME
||
99 bio_op(bio
) == REQ_OP_WRITE_ZEROES
;
102 static inline bool bio_mergeable(struct bio
*bio
)
104 if (bio
->bi_opf
& REQ_NOMERGE_FLAGS
)
110 static inline unsigned int bio_cur_bytes(struct bio
*bio
)
112 if (bio_has_data(bio
))
113 return bio_iovec(bio
).bv_len
;
114 else /* dataless requests such as discard */
115 return bio
->bi_iter
.bi_size
;
118 static inline void *bio_data(struct bio
*bio
)
120 if (bio_has_data(bio
))
121 return page_address(bio_page(bio
)) + bio_offset(bio
);
129 #define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset)
132 * queues that have highmem support enabled may still need to revert to
133 * PIO transfers occasionally and thus map high pages temporarily. For
134 * permanent PIO fall back, user is probably better off disabling highmem
135 * I/O completely on that queue (see ide-dma for example)
137 #define __bio_kmap_atomic(bio, iter) \
138 (kmap_atomic(bio_iter_iovec((bio), (iter)).bv_page) + \
139 bio_iter_iovec((bio), (iter)).bv_offset)
141 #define __bio_kunmap_atomic(addr) kunmap_atomic(addr)
147 /* Default implementation of BIOVEC_PHYS_MERGEABLE */
148 #define __BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
149 ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
152 * allow arch override, for eg virtualized architectures (put in asm/io.h)
154 #ifndef BIOVEC_PHYS_MERGEABLE
155 #define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
156 __BIOVEC_PHYS_MERGEABLE(vec1, vec2)
159 #define __BIO_SEG_BOUNDARY(addr1, addr2, mask) \
160 (((addr1) | (mask)) == (((addr2) - 1) | (mask)))
161 #define BIOVEC_SEG_BOUNDARY(q, b1, b2) \
162 __BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, queue_segment_boundary((q)))
165 * drivers should _never_ use the all version - the bio may have been split
166 * before it got to the driver and the driver won't own all of it
168 #define bio_for_each_segment_all(bvl, bio, i) \
169 for (i = 0, bvl = (bio)->bi_io_vec; i < (bio)->bi_vcnt; i++, bvl++)
171 static inline void bio_advance_iter(struct bio
*bio
, struct bvec_iter
*iter
,
174 iter
->bi_sector
+= bytes
>> 9;
176 if (bio_no_advance_iter(bio
)) {
177 iter
->bi_size
-= bytes
;
178 iter
->bi_done
+= bytes
;
180 bvec_iter_advance(bio
->bi_io_vec
, iter
, bytes
);
181 /* TODO: It is reasonable to complete bio with error here. */
185 static inline bool bio_rewind_iter(struct bio
*bio
, struct bvec_iter
*iter
,
188 iter
->bi_sector
-= bytes
>> 9;
190 if (bio_no_advance_iter(bio
)) {
191 iter
->bi_size
+= bytes
;
192 iter
->bi_done
-= bytes
;
196 return bvec_iter_rewind(bio
->bi_io_vec
, iter
, bytes
);
199 #define __bio_for_each_segment(bvl, bio, iter, start) \
200 for (iter = (start); \
202 ((bvl = bio_iter_iovec((bio), (iter))), 1); \
203 bio_advance_iter((bio), &(iter), (bvl).bv_len))
205 #define bio_for_each_segment(bvl, bio, iter) \
206 __bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter)
208 #define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len)
210 static inline unsigned bio_segments(struct bio
*bio
)
214 struct bvec_iter iter
;
217 * We special case discard/write same/write zeroes, because they
218 * interpret bi_size differently:
221 switch (bio_op(bio
)) {
223 case REQ_OP_SECURE_ERASE
:
224 case REQ_OP_WRITE_ZEROES
:
226 case REQ_OP_WRITE_SAME
:
232 bio_for_each_segment(bv
, bio
, iter
)
239 * get a reference to a bio, so it won't disappear. the intended use is
243 * submit_bio(rw, bio);
244 * if (bio->bi_flags ...)
248 * without the bio_get(), it could potentially complete I/O before submit_bio
249 * returns. and then bio would be freed memory when if (bio->bi_flags ...)
252 static inline void bio_get(struct bio
*bio
)
254 bio
->bi_flags
|= (1 << BIO_REFFED
);
255 smp_mb__before_atomic();
256 atomic_inc(&bio
->__bi_cnt
);
259 static inline void bio_cnt_set(struct bio
*bio
, unsigned int count
)
262 bio
->bi_flags
|= (1 << BIO_REFFED
);
263 smp_mb__before_atomic();
265 atomic_set(&bio
->__bi_cnt
, count
);
268 static inline bool bio_flagged(struct bio
*bio
, unsigned int bit
)
270 return (bio
->bi_flags
& (1U << bit
)) != 0;
273 static inline void bio_set_flag(struct bio
*bio
, unsigned int bit
)
275 bio
->bi_flags
|= (1U << bit
);
278 static inline void bio_clear_flag(struct bio
*bio
, unsigned int bit
)
280 bio
->bi_flags
&= ~(1U << bit
);
283 static inline void bio_get_first_bvec(struct bio
*bio
, struct bio_vec
*bv
)
285 *bv
= bio_iovec(bio
);
288 static inline void bio_get_last_bvec(struct bio
*bio
, struct bio_vec
*bv
)
290 struct bvec_iter iter
= bio
->bi_iter
;
293 if (unlikely(!bio_multiple_segments(bio
))) {
294 *bv
= bio_iovec(bio
);
298 bio_advance_iter(bio
, &iter
, iter
.bi_size
);
300 if (!iter
.bi_bvec_done
)
301 idx
= iter
.bi_idx
- 1;
302 else /* in the middle of bvec */
305 *bv
= bio
->bi_io_vec
[idx
];
308 * iter.bi_bvec_done records actual length of the last bvec
309 * if this bio ends in the middle of one io vector
311 if (iter
.bi_bvec_done
)
312 bv
->bv_len
= iter
.bi_bvec_done
;
316 BIP_BLOCK_INTEGRITY
= 1 << 0, /* block layer owns integrity data */
317 BIP_MAPPED_INTEGRITY
= 1 << 1, /* ref tag has been remapped */
318 BIP_CTRL_NOCHECK
= 1 << 2, /* disable HBA integrity checking */
319 BIP_DISK_NOCHECK
= 1 << 3, /* disable disk integrity checking */
320 BIP_IP_CHECKSUM
= 1 << 4, /* IP checksum */
324 * bio integrity payload
326 struct bio_integrity_payload
{
327 struct bio
*bip_bio
; /* parent bio */
329 struct bvec_iter bip_iter
;
331 unsigned short bip_slab
; /* slab the bip came from */
332 unsigned short bip_vcnt
; /* # of integrity bio_vecs */
333 unsigned short bip_max_vcnt
; /* integrity bio_vec slots */
334 unsigned short bip_flags
; /* control flags */
336 struct work_struct bip_work
; /* I/O completion */
338 struct bio_vec
*bip_vec
;
339 struct bio_vec bip_inline_vecs
[0];/* embedded bvec array */
342 #if defined(CONFIG_BLK_DEV_INTEGRITY)
344 static inline struct bio_integrity_payload
*bio_integrity(struct bio
*bio
)
346 if (bio
->bi_opf
& REQ_INTEGRITY
)
347 return bio
->bi_integrity
;
352 static inline bool bio_integrity_flagged(struct bio
*bio
, enum bip_flags flag
)
354 struct bio_integrity_payload
*bip
= bio_integrity(bio
);
357 return bip
->bip_flags
& flag
;
362 static inline sector_t
bip_get_seed(struct bio_integrity_payload
*bip
)
364 return bip
->bip_iter
.bi_sector
;
367 static inline void bip_set_seed(struct bio_integrity_payload
*bip
,
370 bip
->bip_iter
.bi_sector
= seed
;
373 #endif /* CONFIG_BLK_DEV_INTEGRITY */
375 extern void bio_trim(struct bio
*bio
, int offset
, int size
);
376 extern struct bio
*bio_split(struct bio
*bio
, int sectors
,
377 gfp_t gfp
, struct bio_set
*bs
);
380 * bio_next_split - get next @sectors from a bio, splitting if necessary
382 * @sectors: number of sectors to split from the front of @bio
384 * @bs: bio set to allocate from
386 * Returns a bio representing the next @sectors of @bio - if the bio is smaller
387 * than @sectors, returns the original bio unchanged.
389 static inline struct bio
*bio_next_split(struct bio
*bio
, int sectors
,
390 gfp_t gfp
, struct bio_set
*bs
)
392 if (sectors
>= bio_sectors(bio
))
395 return bio_split(bio
, sectors
, gfp
, bs
);
398 extern struct bio_set
*bioset_create(unsigned int, unsigned int, int flags
);
400 BIOSET_NEED_BVECS
= BIT(0),
401 BIOSET_NEED_RESCUER
= BIT(1),
403 extern void bioset_free(struct bio_set
*);
404 extern mempool_t
*biovec_create_pool(int pool_entries
);
406 extern struct bio
*bio_alloc_bioset(gfp_t
, unsigned int, struct bio_set
*);
407 extern void bio_put(struct bio
*);
409 extern void __bio_clone_fast(struct bio
*, struct bio
*);
410 extern struct bio
*bio_clone_fast(struct bio
*, gfp_t
, struct bio_set
*);
411 extern struct bio
*bio_clone_bioset(struct bio
*, gfp_t
, struct bio_set
*bs
);
413 extern struct bio_set
*fs_bio_set
;
415 static inline struct bio
*bio_alloc(gfp_t gfp_mask
, unsigned int nr_iovecs
)
417 return bio_alloc_bioset(gfp_mask
, nr_iovecs
, fs_bio_set
);
420 static inline struct bio
*bio_kmalloc(gfp_t gfp_mask
, unsigned int nr_iovecs
)
422 return bio_alloc_bioset(gfp_mask
, nr_iovecs
, NULL
);
425 static inline struct bio
*bio_clone_kmalloc(struct bio
*bio
, gfp_t gfp_mask
)
427 return bio_clone_bioset(bio
, gfp_mask
, NULL
);
431 extern blk_qc_t
submit_bio(struct bio
*);
433 extern void bio_endio(struct bio
*);
435 static inline void bio_io_error(struct bio
*bio
)
437 bio
->bi_status
= BLK_STS_IOERR
;
441 static inline void bio_wouldblock_error(struct bio
*bio
)
443 bio
->bi_status
= BLK_STS_AGAIN
;
447 struct request_queue
;
448 extern int bio_phys_segments(struct request_queue
*, struct bio
*);
450 extern int submit_bio_wait(struct bio
*bio
);
451 extern void bio_advance(struct bio
*, unsigned);
453 extern void bio_init(struct bio
*bio
, struct bio_vec
*table
,
454 unsigned short max_vecs
);
455 extern void bio_uninit(struct bio
*);
456 extern void bio_reset(struct bio
*);
457 void bio_chain(struct bio
*, struct bio
*);
459 extern int bio_add_page(struct bio
*, struct page
*, unsigned int,unsigned int);
460 extern int bio_add_pc_page(struct request_queue
*, struct bio
*, struct page
*,
461 unsigned int, unsigned int);
462 int bio_iov_iter_get_pages(struct bio
*bio
, struct iov_iter
*iter
);
464 extern struct bio
*bio_map_user_iov(struct request_queue
*,
465 const struct iov_iter
*, gfp_t
);
466 extern void bio_unmap_user(struct bio
*);
467 extern struct bio
*bio_map_kern(struct request_queue
*, void *, unsigned int,
469 extern struct bio
*bio_copy_kern(struct request_queue
*, void *, unsigned int,
471 extern void bio_set_pages_dirty(struct bio
*bio
);
472 extern void bio_check_pages_dirty(struct bio
*bio
);
474 void generic_start_io_acct(struct request_queue
*q
, int rw
,
475 unsigned long sectors
, struct hd_struct
*part
);
476 void generic_end_io_acct(struct request_queue
*q
, int rw
,
477 struct hd_struct
*part
,
478 unsigned long start_time
);
480 #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
481 # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
483 #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
484 extern void bio_flush_dcache_pages(struct bio
*bi
);
486 static inline void bio_flush_dcache_pages(struct bio
*bi
)
491 extern void bio_copy_data(struct bio
*dst
, struct bio
*src
);
492 extern int bio_alloc_pages(struct bio
*bio
, gfp_t gfp
);
493 extern void bio_free_pages(struct bio
*bio
);
495 extern struct bio
*bio_copy_user_iov(struct request_queue
*,
496 struct rq_map_data
*,
497 const struct iov_iter
*,
499 extern int bio_uncopy_user(struct bio
*);
500 void zero_fill_bio(struct bio
*bio
);
501 extern struct bio_vec
*bvec_alloc(gfp_t
, int, unsigned long *, mempool_t
*);
502 extern void bvec_free(mempool_t
*, struct bio_vec
*, unsigned int);
503 extern unsigned int bvec_nr_vecs(unsigned short idx
);
505 #define bio_set_dev(bio, bdev) \
507 (bio)->bi_disk = (bdev)->bd_disk; \
508 (bio)->bi_partno = (bdev)->bd_partno; \
511 #define bio_copy_dev(dst, src) \
513 (dst)->bi_disk = (src)->bi_disk; \
514 (dst)->bi_partno = (src)->bi_partno; \
517 #define bio_dev(bio) \
518 disk_devt((bio)->bi_disk)
520 #define bio_devname(bio, buf) \
521 __bdevname(bio_dev(bio), (buf))
523 #ifdef CONFIG_BLK_CGROUP
524 int bio_associate_blkcg(struct bio
*bio
, struct cgroup_subsys_state
*blkcg_css
);
525 int bio_associate_current(struct bio
*bio
);
526 void bio_disassociate_task(struct bio
*bio
);
527 void bio_clone_blkcg_association(struct bio
*dst
, struct bio
*src
);
528 #else /* CONFIG_BLK_CGROUP */
529 static inline int bio_associate_blkcg(struct bio
*bio
,
530 struct cgroup_subsys_state
*blkcg_css
) { return 0; }
531 static inline int bio_associate_current(struct bio
*bio
) { return -ENOENT
; }
532 static inline void bio_disassociate_task(struct bio
*bio
) { }
533 static inline void bio_clone_blkcg_association(struct bio
*dst
,
535 #endif /* CONFIG_BLK_CGROUP */
537 #ifdef CONFIG_HIGHMEM
539 * remember never ever reenable interrupts between a bvec_kmap_irq and
542 static inline char *bvec_kmap_irq(struct bio_vec
*bvec
, unsigned long *flags
)
547 * might not be a highmem page, but the preempt/irq count
548 * balancing is a lot nicer this way
550 local_irq_save(*flags
);
551 addr
= (unsigned long) kmap_atomic(bvec
->bv_page
);
553 BUG_ON(addr
& ~PAGE_MASK
);
555 return (char *) addr
+ bvec
->bv_offset
;
558 static inline void bvec_kunmap_irq(char *buffer
, unsigned long *flags
)
560 unsigned long ptr
= (unsigned long) buffer
& PAGE_MASK
;
562 kunmap_atomic((void *) ptr
);
563 local_irq_restore(*flags
);
567 static inline char *bvec_kmap_irq(struct bio_vec
*bvec
, unsigned long *flags
)
569 return page_address(bvec
->bv_page
) + bvec
->bv_offset
;
572 static inline void bvec_kunmap_irq(char *buffer
, unsigned long *flags
)
578 static inline char *__bio_kmap_irq(struct bio
*bio
, struct bvec_iter iter
,
579 unsigned long *flags
)
581 return bvec_kmap_irq(&bio_iter_iovec(bio
, iter
), flags
);
583 #define __bio_kunmap_irq(buf, flags) bvec_kunmap_irq(buf, flags)
585 #define bio_kmap_irq(bio, flags) \
586 __bio_kmap_irq((bio), (bio)->bi_iter, (flags))
587 #define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags)
590 * BIO list management for use by remapping drivers (e.g. DM or MD) and loop.
592 * A bio_list anchors a singly-linked list of bios chained through the bi_next
593 * member of the bio. The bio_list also caches the last list member to allow
594 * fast access to the tail.
601 static inline int bio_list_empty(const struct bio_list
*bl
)
603 return bl
->head
== NULL
;
606 static inline void bio_list_init(struct bio_list
*bl
)
608 bl
->head
= bl
->tail
= NULL
;
611 #define BIO_EMPTY_LIST { NULL, NULL }
613 #define bio_list_for_each(bio, bl) \
614 for (bio = (bl)->head; bio; bio = bio->bi_next)
616 static inline unsigned bio_list_size(const struct bio_list
*bl
)
621 bio_list_for_each(bio
, bl
)
627 static inline void bio_list_add(struct bio_list
*bl
, struct bio
*bio
)
632 bl
->tail
->bi_next
= bio
;
639 static inline void bio_list_add_head(struct bio_list
*bl
, struct bio
*bio
)
641 bio
->bi_next
= bl
->head
;
649 static inline void bio_list_merge(struct bio_list
*bl
, struct bio_list
*bl2
)
655 bl
->tail
->bi_next
= bl2
->head
;
657 bl
->head
= bl2
->head
;
659 bl
->tail
= bl2
->tail
;
662 static inline void bio_list_merge_head(struct bio_list
*bl
,
663 struct bio_list
*bl2
)
669 bl2
->tail
->bi_next
= bl
->head
;
671 bl
->tail
= bl2
->tail
;
673 bl
->head
= bl2
->head
;
676 static inline struct bio
*bio_list_peek(struct bio_list
*bl
)
681 static inline struct bio
*bio_list_pop(struct bio_list
*bl
)
683 struct bio
*bio
= bl
->head
;
686 bl
->head
= bl
->head
->bi_next
;
696 static inline struct bio
*bio_list_get(struct bio_list
*bl
)
698 struct bio
*bio
= bl
->head
;
700 bl
->head
= bl
->tail
= NULL
;
706 * Increment chain count for the bio. Make sure the CHAIN flag update
707 * is visible before the raised count.
709 static inline void bio_inc_remaining(struct bio
*bio
)
711 bio_set_flag(bio
, BIO_CHAIN
);
712 smp_mb__before_atomic();
713 atomic_inc(&bio
->__bi_remaining
);
717 * bio_set is used to allow other portions of the IO system to
718 * allocate their own private memory pools for bio and iovec structures.
719 * These memory pools in turn all allocate from the bio_slab
720 * and the bvec_slabs[].
722 #define BIO_POOL_SIZE 2
725 struct kmem_cache
*bio_slab
;
726 unsigned int front_pad
;
729 mempool_t
*bvec_pool
;
730 #if defined(CONFIG_BLK_DEV_INTEGRITY)
731 mempool_t
*bio_integrity_pool
;
732 mempool_t
*bvec_integrity_pool
;
736 * Deadlock avoidance for stacking block drivers: see comments in
737 * bio_alloc_bioset() for details
739 spinlock_t rescue_lock
;
740 struct bio_list rescue_list
;
741 struct work_struct rescue_work
;
742 struct workqueue_struct
*rescue_workqueue
;
748 struct kmem_cache
*slab
;
752 * a small number of entries is fine, not going to be performance critical.
753 * basically we just need to survive
755 #define BIO_SPLIT_ENTRIES 2
757 #if defined(CONFIG_BLK_DEV_INTEGRITY)
759 #define bip_for_each_vec(bvl, bip, iter) \
760 for_each_bvec(bvl, (bip)->bip_vec, iter, (bip)->bip_iter)
762 #define bio_for_each_integrity_vec(_bvl, _bio, _iter) \
764 bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)
766 extern struct bio_integrity_payload
*bio_integrity_alloc(struct bio
*, gfp_t
, unsigned int);
767 extern int bio_integrity_add_page(struct bio
*, struct page
*, unsigned int, unsigned int);
768 extern bool bio_integrity_prep(struct bio
*);
769 extern void bio_integrity_advance(struct bio
*, unsigned int);
770 extern void bio_integrity_trim(struct bio
*);
771 extern int bio_integrity_clone(struct bio
*, struct bio
*, gfp_t
);
772 extern int bioset_integrity_create(struct bio_set
*, int);
773 extern void bioset_integrity_free(struct bio_set
*);
774 extern void bio_integrity_init(void);
776 #else /* CONFIG_BLK_DEV_INTEGRITY */
778 static inline void *bio_integrity(struct bio
*bio
)
783 static inline int bioset_integrity_create(struct bio_set
*bs
, int pool_size
)
788 static inline void bioset_integrity_free (struct bio_set
*bs
)
793 static inline bool bio_integrity_prep(struct bio
*bio
)
798 static inline int bio_integrity_clone(struct bio
*bio
, struct bio
*bio_src
,
804 static inline void bio_integrity_advance(struct bio
*bio
,
805 unsigned int bytes_done
)
810 static inline void bio_integrity_trim(struct bio
*bio
)
815 static inline void bio_integrity_init(void)
820 static inline bool bio_integrity_flagged(struct bio
*bio
, enum bip_flags flag
)
825 static inline void *bio_integrity_alloc(struct bio
* bio
, gfp_t gfp
,
828 return ERR_PTR(-EINVAL
);
831 static inline int bio_integrity_add_page(struct bio
*bio
, struct page
*page
,
832 unsigned int len
, unsigned int offset
)
837 #endif /* CONFIG_BLK_DEV_INTEGRITY */
839 #endif /* CONFIG_BLOCK */
840 #endif /* __LINUX_BIO_H */