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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2018-05-08 21:33:53 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-14 13:16:08 -0600 |
| commit | 38a72dac48f631c2a90b831a3847cde116f21d3a (patch) | |
| tree | 0db49d64f2f0813ef9ddd29cf4040bcbed6d7ba9 /include/linux/bio.h | |
| parent | f4f8154a08bc5801a3f130db69e370d249e791ab (diff) | |
| download | lwn-38a72dac48f631c2a90b831a3847cde116f21d3a.tar.gz lwn-38a72dac48f631c2a90b831a3847cde116f21d3a.zip | |
block: Add bio_copy_data_iter(), zero_fill_bio_iter()
Add versions that take bvec_iter args instead of using bio->bi_iter - to
be used by bcachefs.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/bio.h')
| -rw-r--r-- | include/linux/bio.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index 91b02520e2f8..5a6ee955a8ac 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -67,8 +67,12 @@ #define bio_multiple_segments(bio) \ ((bio)->bi_iter.bi_size != bio_iovec(bio).bv_len) -#define bio_sectors(bio) ((bio)->bi_iter.bi_size >> 9) -#define bio_end_sector(bio) ((bio)->bi_iter.bi_sector + bio_sectors((bio))) + +#define bvec_iter_sectors(iter) ((iter).bi_size >> 9) +#define bvec_iter_end_sector(iter) ((iter).bi_sector + bvec_iter_sectors((iter))) + +#define bio_sectors(bio) bvec_iter_sectors((bio)->bi_iter) +#define bio_end_sector(bio) bvec_iter_end_sector((bio)->bi_iter) /* * Return the data direction, READ or WRITE. @@ -501,6 +505,8 @@ static inline void bio_flush_dcache_pages(struct bio *bi) } #endif +extern void bio_copy_data_iter(struct bio *dst, struct bvec_iter dst_iter, + struct bio *src, struct bvec_iter src_iter); extern void bio_copy_data(struct bio *dst, struct bio *src); extern void bio_free_pages(struct bio *bio); @@ -509,7 +515,13 @@ extern struct bio *bio_copy_user_iov(struct request_queue *, struct iov_iter *, gfp_t); extern int bio_uncopy_user(struct bio *); -void zero_fill_bio(struct bio *bio); +void zero_fill_bio_iter(struct bio *bio, struct bvec_iter iter); + +static inline void zero_fill_bio(struct bio *bio) +{ + zero_fill_bio_iter(bio, bio->bi_iter); +} + extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *); extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int); extern unsigned int bvec_nr_vecs(unsigned short idx); |