ocfs2: Introduce the new ocfs2_cluster_connect/disconnect() API.
This step introduces a cluster stack agnostic API for initializing and
exiting. fs/ocfs2/dlmglue.c no longer uses o2cb/o2dlm knowledge to
connect to the stack. It is all handled in stackglue.c.
heartbeat.c no longer needs to know how it gets called.
ocfs2_do_node_down() is now a clean recovery trigger.
The big gotcha is the ordering of initializations and de-initializations done
underneath ocfs2_cluster_connect(). ocfs2_dlm_init() used to do all
o2dlm initialization in one block. Thus, the o2dlm functionality of
ocfs2_cluster_connect() is very straightforward. ocfs2_dlm_shutdown(),
however, did a few things between de-registration of the eviction
callback and actually shutting down the domain. Now de-registration and
shutdown of the domain are wrapped within the single
ocfs2_cluster_disconnect() call. I've checked the code paths to make
sure we can safely tear down things in ocfs2_dlm_shutdown() before
calling ocfs2_cluster_disconnect(). The filesystem has already set
itself to ignore the callback.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/heartbeat.c b/fs/ocfs2/heartbeat.c
index 80de239..dcac1a4 100644
--- a/fs/ocfs2/heartbeat.c
+++ b/fs/ocfs2/heartbeat.c
@@ -30,8 +30,6 @@
#include <linux/highmem.h>
#include <linux/kmod.h>
-#include <dlm/dlmapi.h>
-
#define MLOG_MASK_PREFIX ML_SUPER
#include <cluster/masklog.h>
@@ -64,19 +62,20 @@
ocfs2_node_map_init(&osb->osb_recovering_orphan_dirs);
}
-static void ocfs2_do_node_down(int node_num,
- struct ocfs2_super *osb)
+void ocfs2_do_node_down(int node_num, void *data)
{
+ struct ocfs2_super *osb = data;
+
BUG_ON(osb->node_num == node_num);
mlog(0, "ocfs2: node down event for %d\n", node_num);
- if (!osb->dlm) {
+ if (!osb->cconn) {
/*
- * No DLM means we're not even ready to participate yet.
- * We check the slots after the DLM comes up, so we will
- * notice the node death then. We can safely ignore it
- * here.
+ * No cluster connection means we're not even ready to
+ * participate yet. We check the slots after the cluster
+ * comes up, so we will notice the node death then. We
+ * can safely ignore it here.
*/
return;
}
@@ -84,29 +83,6 @@
ocfs2_recovery_thread(osb, node_num);
}
-/* Called from the dlm when it's about to evict a node. We may also
- * get a heartbeat callback later. */
-static void ocfs2_dlm_eviction_cb(int node_num,
- void *data)
-{
- struct ocfs2_super *osb = (struct ocfs2_super *) data;
- struct super_block *sb = osb->sb;
-
- mlog(ML_NOTICE, "device (%u,%u): dlm has evicted node %d\n",
- MAJOR(sb->s_dev), MINOR(sb->s_dev), node_num);
-
- ocfs2_do_node_down(node_num, osb);
-}
-
-void ocfs2_setup_hb_callbacks(struct ocfs2_super *osb)
-{
- /* Not exactly a heartbeat callback, but leads to essentially
- * the same path so we set it up here. */
- dlm_setup_eviction_cb(&osb->osb_eviction_cb,
- ocfs2_dlm_eviction_cb,
- osb);
-}
-
void ocfs2_stop_heartbeat(struct ocfs2_super *osb)
{
int ret;
