ocfs2/cluster: Show per region heartbeat elapsed time
This patch adds a per region debugfs file that shows the elapsed time
since the time the o2hb timer was last armed.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index e8676ac..29aee21 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -81,6 +81,7 @@
#define O2HB_DB_TYPE_FAILEDREGIONS 3
#define O2HB_DB_TYPE_REGION_LIVENODES 4
#define O2HB_DB_TYPE_REGION_NUMBER 5
+#define O2HB_DB_TYPE_REGION_ELAPSED_TIME 6
struct o2hb_debug_buf {
int db_type;
int db_size;
@@ -99,6 +100,7 @@
#define O2HB_DEBUG_QUORUMREGIONS "quorum_regions"
#define O2HB_DEBUG_FAILEDREGIONS "failed_regions"
#define O2HB_DEBUG_REGION_NUMBER "num"
+#define O2HB_DEBUG_REGION_ELAPSED_TIME "elapsed_time_in_ms"
static struct dentry *o2hb_debug_dir;
static struct dentry *o2hb_debug_livenodes;
@@ -209,8 +211,10 @@
struct dentry *hr_debug_dir;
struct dentry *hr_debug_livenodes;
struct dentry *hr_debug_regnum;
+ struct dentry *hr_debug_elapsed_time;
struct o2hb_debug_buf *hr_db_livenodes;
struct o2hb_debug_buf *hr_db_regnum;
+ struct o2hb_debug_buf *hr_db_elapsed_time;
/* let the person setting up hb wait for it to return until it
* has reached a 'steady' state. This will be fixed when we have
@@ -1132,6 +1136,13 @@
reg->hr_region_num);
goto done;
+ case O2HB_DB_TYPE_REGION_ELAPSED_TIME:
+ reg = (struct o2hb_region *)db->db_data;
+ out += snprintf(buf + out, PAGE_SIZE - out, "%u\n",
+ jiffies_to_msecs(jiffies -
+ reg->hr_last_timeout_start));
+ goto done;
+
default:
goto done;
}
@@ -1925,6 +1936,18 @@
goto bail;
}
+ reg->hr_debug_elapsed_time =
+ o2hb_debug_create(O2HB_DEBUG_REGION_ELAPSED_TIME,
+ reg->hr_debug_dir,
+ &(reg->hr_db_elapsed_time),
+ sizeof(*(reg->hr_db_elapsed_time)),
+ O2HB_DB_TYPE_REGION_ELAPSED_TIME,
+ 0, 0, reg);
+ if (!reg->hr_debug_elapsed_time) {
+ mlog_errno(ret);
+ goto bail;
+ }
+
ret = 0;
bail:
return ret;