diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-03-31 15:52:24 -0400 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-03-31 18:02:57 -0400 |
commit | 7f102ee83d83fd918783ca542fac1574f9b2c623 (patch) | |
tree | da560f908d970d3dbad5749c1407ed30b6965c4c /include/linux/bvec.h | |
parent | d22c79d2fff10dd782caf5668fd019387914a5bb (diff) |
Update bcachefs sources to 8fd009dd76 bcachefs: Rip out code for storing backpointers in alloc keysv0.28
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'include/linux/bvec.h')
-rw-r--r-- | include/linux/bvec.h | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h index 5bc68b42..a11373db 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -43,10 +43,6 @@ struct bvec_iter { current bvec */ }; -struct bvec_iter_all { - int idx; -}; - /* * various member access, note that bio_data should of course not be used * on highmem page vectors @@ -98,4 +94,52 @@ static inline void bvec_iter_advance(const struct bio_vec *bv, ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) +/* + * bvec_iter_all: for advancing over individual pages in a bio, as it was when + * it was first created: + */ +struct bvec_iter_all { + int idx; + unsigned done; +}; + +static inline void bvec_iter_all_init(struct bvec_iter_all *iter_all) +{ + iter_all->done = 0; + iter_all->idx = 0; +} + +static inline struct bio_vec __bvec_iter_all_peek(const struct bio_vec *bvec, + const struct bvec_iter_all *iter) +{ + struct bio_vec bv = bvec[iter->idx]; + + BUG_ON(iter->done >= bv.bv_len); + + bv.bv_offset += iter->done; + bv.bv_len -= iter->done; + return bv; +} + +static inline struct bio_vec bvec_iter_all_peek(const struct bio_vec *bvec, + const struct bvec_iter_all *iter) +{ + struct bio_vec bv = __bvec_iter_all_peek(bvec, iter); + + bv.bv_len = min_t(unsigned, PAGE_SIZE - bv.bv_offset, bv.bv_len); + return bv; +} + +static inline void bvec_iter_all_advance(const struct bio_vec *bvec, + struct bvec_iter_all *iter, + unsigned bytes) +{ + iter->done += bytes; + + while (iter->done && iter->done >= bvec[iter->idx].bv_len) { + iter->done -= bvec[iter->idx].bv_len; + iter->idx++; + } +} + #endif /* __LINUX_BVEC_ITER_H */ |