[PATCH 21/24] GFS2: smbd proccess hangs with flock() call.

From: Steven Whitehouse
Date: Wed Jun 10 2009 - 05:43:39 EST

From: Abhijith Das <adas@xxxxxxxxxx>

GFS2 currently does not support mandatory flocks. An flock() call with
LOCK_MAND triggers unexpected behavior because gfs2 is not checking for
this lock type. This patch corrects that.

Signed-off-by: Abhi Das <adas@xxxxxxxxxx>
Signed-off-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 73b6f55..841ddc9 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -698,8 +698,8 @@ static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)

if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
- if (__mandatory_lock(&ip->i_inode))
- return -ENOLCK;
+ if (fl->fl_type & LOCK_MAND)
+ return -EOPNOTSUPP;

if (fl->fl_type == F_UNLCK) {
do_unflock(file, fl);

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