linux-ext4 - [PATCH 5/6] libext2fs: don't hang on to unmapped block if extent tree update fails

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Date:	Mon, 20 Jan 2014 22:22:11 -0800
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	tytso@....edu, darrick.wong@...cle.com
Cc:	linux-ext4@...r.kernel.org
Subject: [PATCH 5/6] libext2fs: don't hang on to unmapped block if extent tree
 update fails

If we're doing a BMAP_ALLOC allocation and the extent tree update
fails, there's no point in hanging on to the newly allocated block.
So, free it to make fsck happy.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
 lib/ext2fs/bmap.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/ext2fs/bmap.c b/lib/ext2fs/bmap.c
index b944c27..db2fd72 100644
--- a/lib/ext2fs/bmap.c
+++ b/lib/ext2fs/bmap.c
@@ -255,8 +255,10 @@ got_block:
 	set_extent:
 		retval = ext2fs_extent_set_bmap(handle, block,
 						blk64, 0);
-		if (retval)
+		if (retval) {
+			ext2fs_block_alloc_stats2(fs, blk64, -1);
 			return retval;
+		}
 		/* Update inode after setting extent */
 		retval = ext2fs_read_inode(fs, ino, inode);
 		if (retval)

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