xfs: return FIEMAP_EXTENT_UNKNOWN for delayed allocation extent

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@oracle.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index ca9ecaa81112..c69bbc493cb0 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -987,7 +987,8 @@ 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)