Ocfs2 devel - Feb 2006 - [PATCH 04/14] ocfs2: introduce generic heartbeat resource

This patch creates a generic heartbeat "base" object that can be used
 to create a generic heartbeat implementation.

 Following patches will split the disk-specific heartbeat code out from
 heartbeat.c, and finally add a user heartbeat implementation that uses
 the generic implementation.

 This patch alone is essentially a no-op.

 fs/ocfs2/cluster/heartbeat.c |   25 +++++++------------------
 fs/ocfs2/cluster/heartbeat.h |   19 +++++++++++++++++++
 2 files changed, 26 insertions(+), 18 deletions(-)

Signed-off-by: Jeff Mahoney <jeffm at suse.com>

diff -ruNpX ../dontdiff
linux-2.6.16-rc4.ocfs2-staging1/fs/ocfs2/cluster/heartbeat.c
linux-2.6.16-rc4.ocfs2-staging2/fs/ocfs2/cluster/heartbeat.c
--- linux-2.6.16-rc4.ocfs2-staging1/fs/ocfs2/cluster/heartbeat.c	2006-02-21
11:41:25.000000000 -0500
+++ linux-2.6.16-rc4.ocfs2-staging2/fs/ocfs2/cluster/heartbeat.c	2006-02-21
11:44:31.000000000 -0500
@@ -107,7 +107,7 @@ struct o2hb_disk_slot {
 /* each thread owns a region.. when we're asked to tear down the region
  * we ask the thread to stop, who cleans up the region */
 struct o2hb_region {
-	struct config_item	hr_item;
+	struct o2hb_heartbeat_resource hr_res;
 
 	struct list_head	hr_all_item;
 	unsigned		hr_unclean_stop:1;
@@ -998,7 +998,8 @@ EXPORT_SYMBOL_GPL(o2hb_fill_node_map);
 
 static struct o2hb_region *to_o2hb_region(struct config_item *item)
 {
-	return item ? container_of(item, struct o2hb_region, hr_item) : NULL;
+	return container_of(to_o2hb_heartbeat_resource(item),
+	                    struct o2hb_region, hr_res);
 }
 
 /* drop_item only drops its ref after killing the thread, nothing should
@@ -1362,7 +1363,7 @@ static ssize_t o2hb_region_dev_write(str
 	atomic_set(&reg->hr_steady_iterations, O2HB_LIVE_THRESHOLD + 1);
 
 	reg->hr_task = kthread_run(o2hb_thread, reg, "o2hb-%s",
-				   reg->hr_item.ci_name);
+				   reg->hr_res.hr_item.ci_name);
 	if (IS_ERR(reg->hr_task)) {
 		ret = PTR_ERR(reg->hr_task);
 		mlog_errno(ret);
@@ -1480,19 +1481,6 @@ static struct config_item_type o2hb_regi
 };
 
 /* heartbeat set */
-
-struct o2hb_heartbeat_group {
-	struct config_group hs_group;
-	/* some stuff? */
-};
-
-static struct o2hb_heartbeat_group *to_o2hb_heartbeat_group(struct config_group
*group)
-{
-	return group ?
-		container_of(group, struct o2hb_heartbeat_group, hs_group)
-		: NULL;
-}
-
 static struct config_item *o2hb_heartbeat_group_make_item(struct config_group
*group,
 							  const char *name)
 {
@@ -1503,9 +1491,10 @@ static struct config_item *o2hb_heartbea
 	if (reg == NULL)
 		goto out; /* ENOMEM */
 
-	config_item_init_type_name(&reg->hr_item, name, &o2hb_region_type);
+	config_item_init_type_name(&reg->hr_res.hr_item, name,
+	                           &o2hb_region_type);
 
-	ret = &reg->hr_item;
+	ret = &reg->hr_res.hr_item;
 
 	spin_lock(&o2hb_live_lock);
 	list_add_tail(&reg->hr_all_item, &o2hb_all_regions);
diff -ruNpX ../dontdiff
linux-2.6.16-rc4.ocfs2-staging1/fs/ocfs2/cluster/heartbeat.h
linux-2.6.16-rc4.ocfs2-staging2/fs/ocfs2/cluster/heartbeat.h
--- linux-2.6.16-rc4.ocfs2-staging1/fs/ocfs2/cluster/heartbeat.h	2006-02-21
11:41:25.000000000 -0500
+++ linux-2.6.16-rc4.ocfs2-staging2/fs/ocfs2/cluster/heartbeat.h	2006-02-21
11:44:31.000000000 -0500
@@ -27,6 +27,7 @@
 #ifndef O2CLUSTER_HEARTBEAT_H
 #define O2CLUSTER_HEARTBEAT_H
 
+#include <linux/configfs.h>
 #include "ocfs2_heartbeat.h"
 
 #define O2HB_REGION_TIMEOUT_MS		2000
@@ -52,6 +53,15 @@ enum o2hb_callback_type {
 	O2HB_NUM_CB
 };
 
+struct o2hb_heartbeat_group {
+	struct config_group hs_group;
+	/* some stuff? */
+};
+
+struct o2hb_heartbeat_resource {
+	struct config_item hr_item;
+};
+
 struct o2nm_node;
 typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *);
 
@@ -84,4 +94,13 @@ int o2hb_check_local_node_heartbeating(v
 int o2hb_check_local_node_heartbeating_from_callback(void);
 void o2hb_stop_all_regions(void);
 
+static inline struct o2hb_heartbeat_group *to_o2hb_heartbeat_group(struct
config_group *group)
+{
+	return container_of(group, struct o2hb_heartbeat_group, hs_group);
+}
+
+static inline struct o2hb_heartbeat_resource *to_o2hb_heartbeat_resource(struct
config_item *item)
+{
+	return container_of(item, struct o2hb_heartbeat_resource, hr_item);
+}
 #endif /* O2CLUSTER_HEARTBEAT_H */