diff options
| author | Ming Lei <ming.lei@redhat.com> | 2017-12-18 15:22:03 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-06 19:18:00 +0300 |
| commit | 86292abc5af206f64192a0b60da06fd604debdc0 (patch) | |
| tree | 7b66d61bb987c976f934316e4b316c0191afe426 /include | |
| parent | 9b25bd0368d562d1929059e8eb9de4102567b923 (diff) | |
| download | linux-86292abc5af206f64192a0b60da06fd604debdc0.tar.xz | |
block: introduce bio helpers for converting to multipage bvec
The following helpers are introduced for converting current users of
direct access to bvec table, and prepares for supporting multipage bvec:
bio_pages_all()
bio_first_bvec_all()
bio_first_page_all()
bio_last_bvec_all()
All are named as bio_*_all() to following bio_for_each_segment_all(),
they can only be used on bio of !bio_flagged(bio, BIO_CLONED), that means
the whole bvec table is covered.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bio.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index 82f0c8fd7be8..435ddf04e889 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -300,6 +300,29 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv) bv->bv_len = iter.bi_bvec_done; } +static inline unsigned bio_pages_all(struct bio *bio) +{ + WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); + return bio->bi_vcnt; +} + +static inline struct bio_vec *bio_first_bvec_all(struct bio *bio) +{ + WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); + return bio->bi_io_vec; +} + +static inline struct page *bio_first_page_all(struct bio *bio) +{ + return bio_first_bvec_all(bio)->bv_page; +} + +static inline struct bio_vec *bio_last_bvec_all(struct bio *bio) +{ + WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); + return &bio->bi_io_vec[bio->bi_vcnt - 1]; +} + enum bip_flags { BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */ BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */ |