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| author |   Omar Sandoval <osandov@fb.com> | 2020-04-16 14:46:11 -0700 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2020-05-25 11:25:24 +0200 |
| commit | 1072c12d7d58b5512b6c05c2268f57d32f1ab76c (patch) | |
| tree | 45deabef6738854caebcdada4773a68c3bae35b6 /include/linux/bio.h | |
| parent | btrfs: simplify error handling of clean_pinned_extents() (diff) | |
| download | wireguard-linux-1072c12d7d58b5512b6c05c2268f57d32f1ab76c.tar.xz wireguard-linux-1072c12d7d58b5512b6c05c2268f57d32f1ab76c.zip | |
block: add bio_for_each_bvec_all()
An upcoming Btrfs fix needs to know the original size of a non-cloned
bios. Rather than accessing the bvec table directly, let's add a
bio_for_each_bvec_all() accessor.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'include/linux/bio.h')
| -rw-r--r-- | include/linux/bio.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index a0ee494a6329..8e23f51ccfa4 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -169,6 +169,14 @@ static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, #define bio_for_each_bvec(bvl, bio, iter) \ __bio_for_each_bvec(bvl, bio, iter, (bio)->bi_iter) +/* + * Iterate over all multi-page bvecs. Drivers shouldn't use this version for the + * same reasons as bio_for_each_segment_all(). + */ +#define bio_for_each_bvec_all(bvl, bio, i) \ + for (i = 0, bvl = bio_first_bvec_all(bio); \ + i < (bio)->bi_vcnt; i++, bvl++) \ + #define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len) static inline unsigned bio_segments(struct bio *bio) |