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authorSunil Mushran <sunil.mushran@oracle.com>2010-10-07 14:31:06 -0700
committerSunil Mushran <sunil.mushran@oracle.com>2010-10-07 14:31:06 -0700
commitb3c85c4cdf77154acc940dd0f14d1fb99cbbaf75 (patch)
treec88f7d311ba46650691768dffc90362db9129338
parentb1365d0bd14b912cceb424cbeed9fe939a9038e3 (diff)
ocfs2/cluster: Get all heartbeat regions
Export function in o2hb to get a list of heartbeat regions. It also adds an upper limit to the length of the heartbeat region name. o2hb_global_heartbeat_active() currently disables global heartbeat. It will be enabled in a later patch after all the code is added. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
-rw-r--r--fs/ocfs2/cluster/heartbeat.c34
-rw-r--r--fs/ocfs2/cluster/heartbeat.h4
2 files changed, 38 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 4d36459a8343..3415e58ff77b 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1623,6 +1623,9 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g
if (reg == NULL)
return ERR_PTR(-ENOMEM);
+ if (strlen(name) > O2HB_MAX_REGION_NAME_LEN)
+ return ERR_PTR(-ENAMETOOLONG);
+
config_item_init_type_name(&reg->hr_item, name, &o2hb_region_type);
spin_lock(&o2hb_live_lock);
@@ -2035,3 +2038,34 @@ void o2hb_stop_all_regions(void)
spin_unlock(&o2hb_live_lock);
}
EXPORT_SYMBOL_GPL(o2hb_stop_all_regions);
+
+int o2hb_get_all_regions(char *region_uuids, u8 max_regions)
+{
+ struct o2hb_region *reg;
+ int numregs = 0;
+ char *p;
+
+ spin_lock(&o2hb_live_lock);
+
+ p = region_uuids;
+ list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+ mlog(0, "Region: %s\n", config_item_name(&reg->hr_item));
+ if (numregs < max_regions) {
+ memcpy(p, config_item_name(&reg->hr_item),
+ O2HB_MAX_REGION_NAME_LEN);
+ p += O2HB_MAX_REGION_NAME_LEN;
+ }
+ numregs++;
+ }
+
+ spin_unlock(&o2hb_live_lock);
+
+ return numregs;
+}
+EXPORT_SYMBOL_GPL(o2hb_get_all_regions);
+
+int o2hb_global_heartbeat_active(void)
+{
+ return 0;
+}
+EXPORT_SYMBOL(o2hb_global_heartbeat_active);
diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h
index 2f1649253b49..00ad8e8fea51 100644
--- a/fs/ocfs2/cluster/heartbeat.h
+++ b/fs/ocfs2/cluster/heartbeat.h
@@ -31,6 +31,8 @@
#define O2HB_REGION_TIMEOUT_MS 2000
+#define O2HB_MAX_REGION_NAME_LEN 32
+
/* number of changes to be seen as live */
#define O2HB_LIVE_THRESHOLD 2
/* number of equal samples to be seen as dead */
@@ -81,5 +83,7 @@ int o2hb_check_node_heartbeating(u8 node_num);
int o2hb_check_node_heartbeating_from_callback(u8 node_num);
int o2hb_check_local_node_heartbeating(void);
void o2hb_stop_all_regions(void);
+int o2hb_get_all_regions(char *region_uuids, u8 numregions);
+int o2hb_global_heartbeat_active(void);
#endif /* O2CLUSTER_HEARTBEAT_H */