There are still several direct access to .bi_vcnt, so introduce this helper to replace that usage for supporting multipage bvec.
Signed-off-by: Ming Lei <[email protected]> --- include/linux/bio.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/bio.h b/include/linux/bio.h index efa0b3627735..b0929cf8c7fe 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -391,6 +391,27 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv) bv->bv_len = iter.bi_bvec_done; } +/* + * Return how many singlepage bvecs included in this bio, + * and this helper is only used for some fs to replace + * bio->bi_vcnt. + */ +static inline unsigned bio_segments_all(struct bio *bio) +{ + unsigned segs = 0; + int i; + struct bio_vec *bv; + struct bvec_iter_all bia; + + WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); + + bio_for_each_segment_all_sp(bv, bio, i, bia) + segs++; + + return segs; +} + + enum bip_flags { BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */ BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */ -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
