ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node

This is done to differentiate between using and not using controld and
use the connection information accordingly.

We need to be backward compatible.  So, we use a new enum
ocfs2_connection_type to identify when controld is used and when it is
not.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: Goldwyn Rodrigues

fs/ocfs2/dlmglue.c

@@ -3007,7 +3007,7 @@ int ocfs2_dlm_init(struct ocfs2_super *osb)
 		goto bail;
 	}
 
-	status = ocfs2_cluster_this_node(&osb->node_num);
+	status = ocfs2_cluster_this_node(conn, &osb->node_num);
 	if (status < 0) {
 		mlog_errno(status);
 		mlog(ML_ERROR,

fs/ocfs2/stack_o2cb.c

@@ -398,7 +398,8 @@ static int o2cb_cluster_disconnect(struct ocfs2_cluster_connection *conn)
 	return 0;
 }
 
-static int o2cb_cluster_this_node(unsigned int *node)
+static int o2cb_cluster_this_node(struct ocfs2_cluster_connection *conn,
+				  unsigned int *node)
 {
 	int node_num;
 

fs/ocfs2/stack_user.c

@@ -103,13 +103,19 @@
 #define OCFS2_CONTROL_MESSAGE_VERNUM_LEN	2
 #define OCFS2_CONTROL_MESSAGE_NODENUM_LEN	8
 
+enum ocfs2_connection_type {
+	WITH_CONTROLD,
+	NO_CONTROLD
+};
+
 /*
  * ocfs2_live_connection is refcounted because the filesystem and
  * miscdevice sides can detach in different order.  Let's just be safe.
  */
 struct ocfs2_live_connection {
 	struct list_head		oc_list;
 	struct ocfs2_cluster_connection	*oc_conn;
+	enum ocfs2_connection_type	oc_type;
 	atomic_t                        oc_this_node;
 	int                             oc_our_slot;
 };
@@ -840,6 +846,7 @@ static int user_cluster_connect(struct ocfs2_cluster_connection *conn)
 		goto out;
 	}
 
+	lc->oc_type = WITH_CONTROLD;
 	rc = ocfs2_live_connection_attach(conn, lc);
 	if (rc)
 		goto out;
@@ -886,11 +893,16 @@ static int user_cluster_disconnect(struct ocfs2_cluster_connection *conn)
 	return 0;
 }
 
-static int user_cluster_this_node(unsigned int *this_node)
+static int user_cluster_this_node(struct ocfs2_cluster_connection *conn,
+				  unsigned int *this_node)
 {
 	int rc;
+	struct ocfs2_live_connection *lc = conn->cc_private;
 
-	rc = ocfs2_control_get_this_node();
+	if (lc->oc_type == WITH_CONTROLD)
+		rc = ocfs2_control_get_this_node();
+	else
+		rc = -EINVAL;
 	if (rc < 0)
 		return rc;
 

fs/ocfs2/stackglue.c

@@ -465,9 +465,10 @@ void ocfs2_cluster_hangup(const char *group, int grouplen)
 }
 EXPORT_SYMBOL_GPL(ocfs2_cluster_hangup);
 
-int ocfs2_cluster_this_node(unsigned int *node)
+int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn,
+			    unsigned int *node)
 {
-	return active_stack->sp_ops->this_node(node);
+	return active_stack->sp_ops->this_node(conn, node);
 }
 EXPORT_SYMBOL_GPL(ocfs2_cluster_this_node);
 

fs/ocfs2/stackglue.h

@@ -157,7 +157,8 @@ struct ocfs2_stack_operations {
 	 * ->this_node() returns the cluster's unique identifier for the
 	 * local node.
 	 */
-	int (*this_node)(unsigned int *node);
+	int (*this_node)(struct ocfs2_cluster_connection *conn,
+			 unsigned int *node);
 
 	/*
 	 * Call the underlying dlm lock function.  The ->dlm_lock()
@@ -267,7 +268,8 @@ int ocfs2_cluster_connect_agnostic(const char *group,
 int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
 			     int hangup_pending);
 void ocfs2_cluster_hangup(const char *group, int grouplen);
-int ocfs2_cluster_this_node(unsigned int *node);
+int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn,
+			    unsigned int *node);
 
 struct ocfs2_lock_res;
 int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,