From: Sunil Mushran Date: Thu, 7 Oct 2010 00:55:21 +0000 (-0700) Subject: ocfs2/cluster: Maintain live node bitmap per heartbeat region X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=823a637ae933fde8fdb280612dd3ff9912e301e3;p=mv-sheeva.git ocfs2/cluster: Maintain live node bitmap per heartbeat region Currently we track a global livenode bitmap that keeps track of all nodes that are heartbeating in all regions. This patch adds the ability to track the livenode bitmap on a per region basis. We will use this facility in a later patch to allow us to withstand the loss of a minority number of regions. Signed-off-by: Sunil Mushran --- diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index 16e49765c85..188f50269b8 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -174,6 +174,9 @@ struct o2hb_region { struct block_device *hr_bdev; struct o2hb_disk_slot *hr_slots; + /* live node map of this region */ + unsigned long hr_live_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)]; + /* 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 * a more complete api that doesn't lead to this sort of fragility. */ @@ -688,6 +691,8 @@ fire_callbacks: mlog(ML_HEARTBEAT, "Node %d (id 0x%llx) joined my region\n", slot->ds_node_num, (long long)slot->ds_last_generation); + set_bit(slot->ds_node_num, reg->hr_live_node_bitmap); + /* first on the list generates a callback */ if (list_empty(&o2hb_live_slots[slot->ds_node_num])) { set_bit(slot->ds_node_num, o2hb_live_node_bitmap); @@ -733,6 +738,8 @@ fire_callbacks: mlog(ML_HEARTBEAT, "Node %d left my region\n", slot->ds_node_num); + clear_bit(slot->ds_node_num, reg->hr_live_node_bitmap); + /* last off the live_slot generates a callback */ list_del_init(&slot->ds_live_item); if (list_empty(&o2hb_live_slots[slot->ds_node_num])) {