From: Abhi Das <adas@redhat.com>
Date: Tue, 9 Jun 2015 14:16:46 +0000 (-0500)
Subject: gfs2: Don't support fallocate on jdata	files
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=86066914edff2316cbed63aac8a87d5001441a16;p=deliverable%2Flinux.git

gfs2: Don't support fallocate on jdata	files

We cannot provide an efficient implementation due to the headers
on the data blocks, so there doesn't seem much point in having it.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
---

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index c706c6df4898..8252115551a6 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -917,7 +917,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t le
 	struct gfs2_holder gh;
 	int ret;
 
-	if (mode & ~FALLOC_FL_KEEP_SIZE)
+	if ((mode & ~FALLOC_FL_KEEP_SIZE) || gfs2_is_jdata(ip))
 		return -EOPNOTSUPP;
 
 	mutex_lock(&inode->i_mutex);