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authorMartin K. Petersen <martin.petersen@oracle.com>2014-02-06 15:14:13 -0500
committerJens Axboe <axboe@fb.com>2014-02-07 13:49:48 -0700
commit087787959ce851d7bbb19f10f6e9241b7f85a3ca (patch)
treed4cd09112a3620906034e88a342b05d1ea49232a /fs
parent14ec77f352cb00ab8425ec2af03bd7e529eefe24 (diff)
downloadlinux-087787959ce851d7bbb19f10f6e9241b7f85a3ca.tar.bz2
block: Fix nr_vecs for inline integrity vectors
Commit 9f060e2231ca changed the way we handle allocations for the integrity vectors. When the vectors are inline there is no associated slab and consequently bvec_nr_vecs() returns 0. Ensure that we check against BIP_INLINE_VECS in that case. Reported-by: David Milburn <dmilburn@redhat.com> Tested-by: David Milburn <dmilburn@redhat.com> Cc: stable@vger.kernel.org # v3.10+ Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/bio-integrity.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index 0bad24ddc2e7..bcb4a4d533a2 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -114,6 +114,14 @@ void bio_integrity_free(struct bio *bio)
}
EXPORT_SYMBOL(bio_integrity_free);
+static inline unsigned int bip_integrity_vecs(struct bio_integrity_payload *bip)
+{
+ if (bip->bip_slab == BIO_POOL_NONE)
+ return BIP_INLINE_VECS;
+
+ return bvec_nr_vecs(bip->bip_slab);
+}
+
/**
* bio_integrity_add_page - Attach integrity metadata
* @bio: bio to update
@@ -129,7 +137,7 @@ int bio_integrity_add_page(struct bio *bio, struct page *page,
struct bio_integrity_payload *bip = bio->bi_integrity;
struct bio_vec *iv;
- if (bip->bip_vcnt >= bvec_nr_vecs(bip->bip_slab)) {
+ if (bip->bip_vcnt >= bip_integrity_vecs(bip)) {
printk(KERN_ERR "%s: bip_vec full\n", __func__);
return 0;
}