From: Josef Bacik <jbacik@fb.com>
Date: Tue, 19 May 2015 14:44:04 +0000 (-0400)
Subject: Btrfs: set UNWRITTEN for prealloc'ed extents in fiemap
X-Git-Tag: v4.1.12-92~162^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=fdbc7938ccc5c66b83167a0821cd33aa6aa2a403;p=users%2Fjedix%2Flinux-maple.git

Btrfs: set UNWRITTEN for prealloc'ed extents in fiemap

Orabug: 22617614

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>

(cherry picked from commit 0d2b2372e097cd3b4150d3ec91e79ac3c5cc750e)
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c32d226bfecc..428930b57dc1 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4492,6 +4492,8 @@ 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;