diff options
| -rw-r--r-- | fs/ocfs2/cluster/heartbeat.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index 2a7cd17e96f0..62a8af271344 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -66,9 +66,12 @@ 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). + * - o2hb_quorum_region_bitmap tracks live regions that have seen all nodes + * heartbeat on it. */ 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)]; +static unsigned long o2hb_quorum_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)]; #define O2HB_DB_TYPE_LIVENODES 0 struct o2hb_debug_buf { @@ -607,6 +610,35 @@ static void o2hb_shutdown_slot(struct o2hb_disk_slot *slot) o2nm_node_put(node); } +static void o2hb_set_quorum_device(struct o2hb_region *reg, + struct o2hb_disk_slot *slot) +{ + assert_spin_locked(&o2hb_live_lock); + + if (!o2hb_global_heartbeat_active()) + return; + + if (test_bit(reg->hr_region_num, o2hb_quorum_region_bitmap)) + return; + + /* + * A region can be added to the quorum only when it sees all + * live nodes heartbeat on it. In other words, the region has been + * added to all nodes. + */ + if (memcmp(reg->hr_live_node_bitmap, o2hb_live_node_bitmap, + sizeof(o2hb_live_node_bitmap))) + return; + + if (slot->ds_changed_samples < O2HB_LIVE_THRESHOLD) + return; + + printk(KERN_NOTICE "o2hb: Region %s is now a quorum device\n", + config_item_name(®->hr_item)); + + set_bit(reg->hr_region_num, o2hb_quorum_region_bitmap); +} + static int o2hb_check_slot(struct o2hb_region *reg, struct o2hb_disk_slot *slot) { @@ -772,6 +804,8 @@ fire_callbacks: slot->ds_equal_samples = 0; } out: + o2hb_set_quorum_device(reg, slot); + spin_unlock(&o2hb_live_lock); o2hb_run_event_list(&event); @@ -1138,6 +1172,7 @@ 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)); + memset(o2hb_quorum_region_bitmap, 0, sizeof(o2hb_quorum_region_bitmap)); return o2hb_debug_init(); } |