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@oracle.com>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/lib/ext2fs/bmap.c b/lib/ext2fs/bmap.c
index b944c27..db2fd72 100644 (file)
--- 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)