GFS2: Don't "get" xattrs for ACLs when ACLs are turned off

This is to match ext3 behaviour. We should not allow getting of
xattrs relating to ACLs when ACLs are turned off.

Reported-by: Nate Straz <nstraz@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 87ee309d4c24..ca991d776592 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -236,10 +236,14 @@ static int gfs2_xattr_system_get(struct dentry *dentry, const char *name,
                                  void *buffer, size_t size, int xtype)
 {
         struct inode *inode = dentry->d_inode;
+        struct gfs2_sbd *sdp = GFS2_SB(inode);
         struct posix_acl *acl;
         int type;
         int error;
 
+        if (!sdp->sd_args.ar_posix_acl)
+                return -EOPNOTSUPP;
+
         type = gfs2_acl_type(name);
         if (type < 0)
                 return type;