[Cluster-devel] GFS2: Change system acls so that they can only be "got" when fs is mounted with acl support

[Cluster-devel] GFS2: Change system acls so that they can only be "got" when fs is mounted with acl support

[Steven Whitehouse]

In the recent updates to xattr/acls the behaviour has changed
slightly in that it was possible to look at the content of acls
on filesystems mounted noacl. This patch changes the code
to match the prior behaviour (and also that of ext3)

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 87ee309..ca991d7 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;