diff mbox

[3.11,010/208] Btrfs: fix hole check in log_one_extent

Message ID 1389628849-1614-11-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Jan. 13, 2014, 3:57 p.m. UTC 
3.11.10.3 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Josef Bacik <jbacik@fusionio.com>

commit ed9e8af88e2551aaa6bf51d8063a2493e2d71597 upstream.

I added an assert to make sure we were looking up aligned offsets for csums and
I tripped it when running xfstests.  This is because log_one_extent was checking
if block_start == 0 for a hole instead of EXTENT_MAP_HOLE.  This worked out fine
in practice it seems, but it adds a lot of extra work that is uneeded.  With
this fix I'm no longer tripping my assert.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/btrfs/tree-log.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index ff60d89..e535185 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -3332,7 +3332,7 @@  static int log_one_extent(struct btrfs_trans_handle *trans,
 		btrfs_set_token_file_extent_type(leaf, fi,
 						 BTRFS_FILE_EXTENT_REG,
 						 &token);
-		if (em->block_start == 0)
+		if (em->block_start == EXTENT_MAP_HOLE)
 			skip_csum = true;
 	}