diff options
author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-26 11:20:30 -0400 |
---|---|---|
committer | Chris Mason <chris.mason@oracle.com> | 2010-05-26 21:35:33 -0400 |
commit | 5bdd3536cbbe2ecd94ecc14410c6b1b31da16381 (patch) | |
tree | 7fd9cd2cb497f6150a5dfde4528ba6ba64144e40 /fs/btrfs | |
parent | 46bfbb5c0740c200d2b66afcbd1f9d64ab320940 (diff) |
Btrfs: Fix block generation verification race
After the path is released, the generation number got from block
pointer is no long valid. The race may cause disk corruption, because
verify_parent_transid() calls clear_extent_buffer_uptodate() when
generation numbers mismatch.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r-- | fs/btrfs/ctree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index acd532af8e55..0d1d966b0fe4 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c | |||
@@ -1604,7 +1604,7 @@ read_block_for_search(struct btrfs_trans_handle *trans, | |||
1604 | btrfs_release_path(NULL, p); | 1604 | btrfs_release_path(NULL, p); |
1605 | 1605 | ||
1606 | ret = -EAGAIN; | 1606 | ret = -EAGAIN; |
1607 | tmp = read_tree_block(root, blocknr, blocksize, gen); | 1607 | tmp = read_tree_block(root, blocknr, blocksize, 0); |
1608 | if (tmp) { | 1608 | if (tmp) { |
1609 | /* | 1609 | /* |
1610 | * If the read above didn't mark this buffer up to date, | 1610 | * If the read above didn't mark this buffer up to date, |