[PATCH] xfs: return FIEMAP_EXTENT_UNKNOWN for delayed allocation extent

[Jeff Liu]

From: Jie Liu <jeff.liu at oracle.com>

For FIEMAP ioctl(2), if an extent is in delayed allocation
state, we need to return the FIEMAP_EXTENT_UNKNOWN flag except
the FIEMAP_EXTENT_DELALLOC because its data location is unknown.

Signed-off-by: Jie Liu <jeff.liu at oracle.com>
---
 fs/xfs/xfs_iops.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index d82efaa..53ddbdb 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -970,7 +970,8 @@ xfs_fiemap_format(
 	if (bmv->bmv_oflags & BMV_OF_PREALLOC)
 		fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
 	else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
-		fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
+		fiemap_flags |= (FIEMAP_EXTENT_DELALLOC |
+				 FIEMAP_EXTENT_UNKNOWN);
 		physical = 0;   /* no block yet */
 	}
 	if (bmv->bmv_oflags & BMV_OF_LAST)
-- 
1.7.9.5