Btrfs: set UNWRITTEN for prealloc'ed extents in fiemap

We should be doing this, it's weird we hadn't been doing this. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
mariux64 · Jun 3, 2015 · 0d2b237 · 0d2b237
1 parent c8d3fe0
commit 0d2b237
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
@@ -4497,6 +4497,8 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		}
 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))
 			flags |= FIEMAP_EXTENT_ENCODED;
+		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
+			flags |= FIEMAP_EXTENT_UNWRITTEN;
 
 		free_extent_map(em);
 		em = NULL;