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Commit e7d656ba authored by Sunil Mushran's avatar Sunil Mushran
Browse files 


ocfs2/cluster: Track bitmap of live heartbeat regions

A heartbeat region becomes live (or active) after a fixed number of (steady)
iterations.

Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
parent 536f0741

fs/ocfs2/cluster/heartbeat.c

+8 −1
Original line number Diff line number Diff line
@@ -65,8 +65,10 @@ static DECLARE_WAIT_QUEUE_HEAD(o2hb_steady_queue); 
/*

 * In global heartbeat, we maintain a series of region bitmaps.

 * 	- o2hb_region_bitmap allows us to limit the region number to max region.

 * 	- o2hb_live_region_bitmap tracks live regions (seen steady iterations).

 */

static unsigned long o2hb_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)];

static unsigned long o2hb_live_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)];



#define O2HB_DB_TYPE_LIVENODES		0

struct o2hb_debug_buf {
@@ -1135,6 +1137,7 @@ int o2hb_init(void) 


	memset(o2hb_live_node_bitmap, 0, sizeof(o2hb_live_node_bitmap));

	memset(o2hb_region_bitmap, 0, sizeof(o2hb_region_bitmap));

	memset(o2hb_live_region_bitmap, 0, sizeof(o2hb_live_region_bitmap));



	return o2hb_debug_init();

}
@@ -1563,6 +1566,8 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg, 
	/* Ok, we were woken.  Make sure it wasn't by drop_item() */

	spin_lock(&o2hb_live_lock);

	hb_task = reg->hr_task;

	if (o2hb_global_heartbeat_active())

		set_bit(reg->hr_region_num, o2hb_live_region_bitmap);

	spin_unlock(&o2hb_live_lock);



	if (hb_task)
@@ -1751,8 +1756,10 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group, 


	/* stop the thread when the user removes the region dir */

	spin_lock(&o2hb_live_lock);

	if (o2hb_global_heartbeat_active())

	if (o2hb_global_heartbeat_active()) {

		clear_bit(reg->hr_region_num, o2hb_region_bitmap);

		clear_bit(reg->hr_region_num, o2hb_live_region_bitmap);

	}

	hb_task = reg->hr_task;

	reg->hr_task = NULL;

	spin_unlock(&o2hb_live_lock);