From: Jie Liu <jeff.liu@oracle.com>
Date: Thu, 6 Jun 2013 13:24:01 +0000 (-0700)
Subject: xfs: return FIEMAP_EXTENT_UNKNOWN for delayed allocation extent
X-Git-Tag: firefly_0821_release~176^2~5705^2~32
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=635c4d0bd94512de3aafa7ae8f45c1dce0fc1ffe;p=firefly-linux-kernel-4.4.55.git

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>
---

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)