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| author | Liu Bo <bo.li.liu@oracle.com> | 2018-01-13 02:07:01 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-01-22 16:08:21 +0100 |
| commit | 0198e5b707cfeb5defbd1b71b1ec6e71580d7db9 (patch) | |
| tree | e386e24dd253ae29cf4d363b6e105f9da731018b /fs/btrfs | |
| parent | btrfs: correct wrong comment about magic number of index_cnt (diff) | |
| download | linux-0198e5b707cfeb5defbd1b71b1ec6e71580d7db9.tar.xz linux-0198e5b707cfeb5defbd1b71b1ec6e71580d7db9.zip | |
Btrfs: raid56: iterate raid56 internal bio with bio_for_each_segment_all
Bio iterated by set_bio_pages_uptodate() is raid56 internal one, so it
will never be a BIO_CLONED bio, and since this is called by end_io
functions, bio->bi_iter.bi_size is zero, we mustn't use
bio_for_each_segment() as that is a no-op if bi_size is zero.
Fixes: 6592e58c6b68e61f003a01ba29a3716e7e2e9484 ("Btrfs: fix write corruption due to bio cloning on raid5/6")
Cc: <stable@vger.kernel.org> # v4.12-rc6+
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/raid56.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index 7b382eeada72..f86ba6a319fe 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -1441,14 +1441,13 @@ static int fail_bio_stripe(struct btrfs_raid_bio *rbio, */ static void set_bio_pages_uptodate(struct bio *bio) { - struct bio_vec bvec; - struct bvec_iter iter; + struct bio_vec *bvec; + int i; - if (bio_flagged(bio, BIO_CLONED)) - bio->bi_iter = btrfs_io_bio(bio)->iter; + ASSERT(!bio_flagged(bio, BIO_CLONED)); - bio_for_each_segment(bvec, bio, iter) - SetPageUptodate(bvec.bv_page); + bio_for_each_segment_all(bvec, bio, i) + SetPageUptodate(bvec->bv_page); } /* |