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| author | Sunil Mushran <sunil.mushran@oracle.com> | 2010-10-06 17:55:21 -0700 |
|---|---|---|
| committer | Sunil Mushran <sunil.mushran@oracle.com> | 2010-10-06 17:55:21 -0700 |
| commit | 823a637ae933fde8fdb280612dd3ff9912e301e3 (patch) | |
| tree | 32a6bd6591379ff05285c03f1fcd0f843c351476 /fs | |
| parent | 8ca8b0bbd841b6bcd8ac05e51b0143aa61cfeff3 (diff) | |
| download | linux-823a637ae933fde8fdb280612dd3ff9912e301e3.tar.gz linux-823a637ae933fde8fdb280612dd3ff9912e301e3.tar.bz2 linux-823a637ae933fde8fdb280612dd3ff9912e301e3.zip | |
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')
| -rw-r--r-- | fs/ocfs2/cluster/heartbeat.c | 7 |
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])) { |