Messages in this thread Patch in this message | | | From | Dave Kleikamp <> | Subject | [RFC PATCH v2 14/21] bio: add bvec_length(), like iov_length() | Date | Fri, 30 Mar 2012 10:43:41 -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 129a9c0..913087d 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -268,6 +268,14 @@ 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; +} + /* * bio_set is used to allow other portions of the IO system to * allocate their own private memory pools for bio and iovec structures. -- 1.7.9.5
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