[PATCH 15/22] bio: add bvec_length(), like iov_length()
From: Dave Kleikamp <hidden>
Date: 2012-10-22 15:15:15
Also in:
lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
From: Zach Brown <redacted> Signed-off-by: Dave Kleikamp <redacted> Cc: Zach Brown <redacted> --- include/linux/bio.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 820e7aa..f5f9829 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h@@ -290,6 +290,14 @@ extern struct bio_vec *bvec_alloc_bs(gfp_t, int, unsigned long *, struct bio_set extern void bvec_free_bs(struct bio_set *, 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);
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1.7.12.3