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authorSunil Mushran <sunil.mushran@oracle.com>2010-10-07 04:55:21 +0400
committerSunil Mushran <sunil.mushran@oracle.com>2010-10-07 04:55:21 +0400
commit823a637ae933fde8fdb280612dd3ff9912e301e3 (patch)
tree32a6bd6591379ff05285c03f1fcd0f843c351476 /fs/ocfs2
parent8ca8b0bbd841b6bcd8ac05e51b0143aa61cfeff3 (diff)
downloadlinux-823a637ae933fde8fdb280612dd3ff9912e301e3.tar.xz
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 <sunil.mushran@oracle.com>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/cluster/heartbeat.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 16e49765c853..188f50269b89 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])) {