From: Goldwyn Rodrigues <rgoldwyn@suse.com>
Date: Sat, 29 Mar 2014 15:01:53 +0000 (-0500)
Subject: Introduce md_cluster_operations to handle cluster functions
X-Git-Tag: omap-for-v4.1/fixes-rc1~34^2~21^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=edb39c9deda87da5aad9c090e2e8eaf8470c852c;p=pandora-kernel.git

Introduce md_cluster_operations to handle cluster functions

This allows dynamic registering of cluster hooks.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---

diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index bc8ea9d76875..e2235600a72b 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -13,6 +13,7 @@
 #include <linux/dlm.h>
 #include <linux/sched.h>
 #include "md.h"
+#include "md-cluster.h"
 
 #define LVB_SIZE	64
 
@@ -113,15 +114,32 @@ static void lockres_free(struct dlm_lock_resource *res)
 	kfree(res);
 }
 
+static int join(struct mddev *mddev, int nodes)
+{
+	return 0;
+}
+
+static int leave(struct mddev *mddev)
+{
+	return 0;
+}
+
+static struct md_cluster_operations cluster_ops = {
+	.join   = join,
+	.leave  = leave,
+};
+
 static int __init cluster_init(void)
 {
 	pr_warn("md-cluster: EXPERIMENTAL. Use with caution\n");
 	pr_info("Registering Cluster MD functions\n");
+	register_md_cluster_operations(&cluster_ops, THIS_MODULE);
 	return 0;
 }
 
 static void cluster_exit(void)
 {
+	unregister_md_cluster_operations();
 }
 
 module_init(cluster_init);
diff --git a/drivers/md/md-cluster.h b/drivers/md/md-cluster.h
new file mode 100644
index 000000000000..aa9f07bd6b96
--- /dev/null
+++ b/drivers/md/md-cluster.h
@@ -0,0 +1,15 @@
+
+
+#ifndef _MD_CLUSTER_H
+#define _MD_CLUSTER_H
+
+#include "md.h"
+
+struct mddev;
+
+struct md_cluster_operations {
+	int (*join)(struct mddev *mddev);
+	int (*leave)(struct mddev *mddev);
+};
+
+#endif /* _MD_CLUSTER_H */
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