Lock bitmap while joining the cluster

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

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 66700e244a40..75c6602f4c75 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -34,6 +34,7 @@ struct md_cluster_info {
         struct completion completion;
         struct dlm_lock_resource *sb_lock;
         struct mutex sb_mutex;
+        struct dlm_lock_resource *bitmap_lockres;
 };
 
 static void sync_ast(void *arg)
@@ -208,6 +209,18 @@ static int join(struct mddev *mddev, int nodes)
                 ret = -ENOMEM;
                 goto err;
         }
+
+        pr_info("md-cluster: Joined cluster %s slot %d\n", str, cinfo->slot_number);
+        snprintf(str, 64, "bitmap%04d", cinfo->slot_number - 1);
+        cinfo->bitmap_lockres = lockres_init(mddev, str, NULL, 1);
+        if (!cinfo->bitmap_lockres)
+                goto err;
+        if (dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW)) {
+                pr_err("Failed to get bitmap lock\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
         return 0;
 err:
         if (cinfo->lockspace)
@@ -225,6 +238,7 @@ static int leave(struct mddev *mddev)
         if (!cinfo)
                 return 0;
         lockres_free(cinfo->sb_lock);
+        lockres_free(cinfo->bitmap_lockres);
         dlm_release_lockspace(cinfo->lockspace, 2);
         return 0;
 }