| From | Dave Kleikamp <> | Subject | [PATCH V8 16/33] bio: add bvec_length(), like iov_length() | Date | Thu, 25 Jul 2013 12:50:42 -0500 |
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From: Zach Brown <zab@zabbo.net>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com> Cc: Zach Brown <zab@zabbo.net> --- include/linux/bio.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h index ec48bac..4fd5253 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -307,6 +307,14 @@ 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); +static inline ssize_t bvec_length(const struct bio_vec *bvec, unsigned long nr) +{ + ssize_t bytes = 0; + while (nr--) + bytes += (bvec++)->bv_len; + return bytes; +} + #ifdef CONFIG_BLK_CGROUP int bio_associate_current(struct bio *bio); void bio_disassociate_task(struct bio *bio); -- 1.8.3.4
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