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-rw-r--r--fs/ocfs2/dlm/dlmcommon.h6
-rw-r--r--fs/ocfs2/dlm/dlmlock.c14
-rw-r--r--fs/ocfs2/dlm/dlmmaster.c103
-rw-r--r--fs/ocfs2/dlm/dlmrecovery.c38
4 files changed, 142 insertions, 19 deletions
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 9c772583744..a8aec934134 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -658,6 +658,7 @@ void dlm_complete_thread(struct dlm_ctxt *dlm);
int dlm_launch_recovery_thread(struct dlm_ctxt *dlm);
void dlm_complete_recovery_thread(struct dlm_ctxt *dlm);
void dlm_wait_for_recovery(struct dlm_ctxt *dlm);
+void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node);
int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout);
@@ -762,6 +763,11 @@ int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data);
int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data);
int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data);
int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data);
+int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
+ u8 nodenum, u8 *real_master);
+int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res, u8 *real_master);
+
int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res,
diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 671d4ff222c..6fea28318d6 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -141,13 +141,23 @@ static enum dlm_status dlmlock_master(struct dlm_ctxt *dlm,
res->lockname.len)) {
kick_thread = 1;
call_ast = 1;
+ } else {
+ mlog(0, "%s: returning DLM_NORMAL to "
+ "node %u for reco lock\n", dlm->name,
+ lock->ml.node);
}
} else {
/* for NOQUEUE request, unless we get the
* lock right away, return DLM_NOTQUEUED */
- if (flags & LKM_NOQUEUE)
+ if (flags & LKM_NOQUEUE) {
status = DLM_NOTQUEUED;
- else {
+ if (dlm_is_recovery_lock(res->lockname.name,
+ res->lockname.len)) {
+ mlog(0, "%s: returning NOTQUEUED to "
+ "node %u for reco lock\n", dlm->name,
+ lock->ml.node);
+ }
+ } else {
dlm_lock_get(lock);
list_add_tail(&lock->list, &res->blocked);
kick_thread = 1;
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 78ac3a00eb5..940be4c13b1 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -239,6 +239,8 @@ static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm,
static int dlm_mark_lockres_migrating(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res,
u8 target);
+static int dlm_pre_master_reco_lockres(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res);
int dlm_is_host_down(int errno)
@@ -677,6 +679,7 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
struct dlm_node_iter iter;
unsigned int namelen;
int tries = 0;
+ int bit, wait_on_recovery = 0;
BUG_ON(!lockid);
@@ -762,6 +765,18 @@ lookup:
dlm_init_mle(mle, DLM_MLE_MASTER, dlm, res, NULL, 0);
set_bit(dlm->node_num, mle->maybe_map);
list_add(&mle->list, &dlm->master_list);
+
+ /* still holding the dlm spinlock, check the recovery map
+ * to see if there are any nodes that still need to be
+ * considered. these will not appear in the mle nodemap
+ * but they might own this lockres. wait on them. */
+ bit = find_next_bit(dlm->recovery_map, O2NM_MAX_NODES, 0);
+ if (bit < O2NM_MAX_NODES) {
+ mlog(ML_NOTICE, "%s:%.*s: at least one node (%d) to"
+ "recover before lock mastery can begin\n",
+ dlm->name, namelen, (char *)lockid, bit);
+ wait_on_recovery = 1;
+ }
}
/* at this point there is either a DLM_MLE_BLOCK or a
@@ -779,6 +794,39 @@ lookup:
spin_unlock(&dlm->master_lock);
spin_unlock(&dlm->spinlock);
+ while (wait_on_recovery) {
+ /* any cluster changes that occurred after dropping the
+ * dlm spinlock would be detectable be a change on the mle,
+ * so we only need to clear out the recovery map once. */
+ if (dlm_is_recovery_lock(lockid, namelen)) {
+ mlog(ML_NOTICE, "%s: recovery map is not empty, but "
+ "must master $RECOVERY lock now\n", dlm->name);
+ if (!dlm_pre_master_reco_lockres(dlm, res))
+ wait_on_recovery = 0;
+ else {
+ mlog(0, "%s: waiting 500ms for heartbeat state "
+ "change\n", dlm->name);
+ msleep(500);
+ }
+ continue;
+ }
+
+ dlm_kick_recovery_thread(dlm);
+ msleep(100);
+ dlm_wait_for_recovery(dlm);
+
+ spin_lock(&dlm->spinlock);
+ bit = find_next_bit(dlm->recovery_map, O2NM_MAX_NODES, 0);
+ if (bit < O2NM_MAX_NODES) {
+ mlog(ML_NOTICE, "%s:%.*s: at least one node (%d) to"
+ "recover before lock mastery can begin\n",
+ dlm->name, namelen, (char *)lockid, bit);
+ wait_on_recovery = 1;
+ } else
+ wait_on_recovery = 0;
+ spin_unlock(&dlm->spinlock);
+ }
+
/* must wait for lock to be mastered elsewhere */
if (blocked)
goto wait;
@@ -1835,6 +1883,61 @@ static void dlm_assert_master_worker(struct dlm_work_item *item, void *data)
mlog(0, "finished with dlm_assert_master_worker\n");
}
+/* SPECIAL CASE for the $RECOVERY lock used by the recovery thread.
+ * We cannot wait for node recovery to complete to begin mastering this
+ * lockres because this lockres is used to kick off recovery! ;-)
+ * So, do a pre-check on all living nodes to see if any of those nodes
+ * think that $RECOVERY is currently mastered by a dead node. If so,
+ * we wait a short time to allow that node to get notified by its own
+ * heartbeat stack, then check again. All $RECOVERY lock resources
+ * mastered by dead nodes are purged when the hearbeat callback is
+ * fired, so we can know for sure that it is safe to continue once
+ * the node returns a live node or no node. */
+static int dlm_pre_master_reco_lockres(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res)
+{
+ struct dlm_node_iter iter;
+ int nodenum;
+ int ret = 0;
+ u8 master = DLM_LOCK_RES_OWNER_UNKNOWN;
+
+ spin_lock(&dlm->spinlock);
+ dlm_node_iter_init(dlm->domain_map, &iter);
+ spin_unlock(&dlm->spinlock);
+
+ while ((nodenum = dlm_node_iter_next(&iter)) >= 0) {
+ /* do not send to self */
+ if (nodenum == dlm->node_num)
+ continue;
+ ret = dlm_do_master_requery(dlm, res, nodenum, &master);
+ if (ret < 0) {
+ mlog_errno(ret);
+ if (!dlm_is_host_down(ret))
+ BUG();
+ /* host is down, so answer for that node would be
+ * DLM_LOCK_RES_OWNER_UNKNOWN. continue. */
+ }
+
+ if (master != DLM_LOCK_RES_OWNER_UNKNOWN) {
+ /* check to see if this master is in the recovery map */
+ spin_lock(&dlm->spinlock);
+ if (test_bit(master, dlm->recovery_map)) {
+ mlog(ML_NOTICE, "%s: node %u has not seen "
+ "node %u go down yet, and thinks the "
+ "dead node is mastering the recovery "
+ "lock. must wait.\n", dlm->name,
+ nodenum, master);
+ ret = -EAGAIN;
+ }
+ spin_unlock(&dlm->spinlock);
+ mlog(0, "%s: reco lock master is %u\n", dlm->name,
+ master);
+ break;
+ }
+ }
+ return ret;
+}
+
/*
* DLM_MIGRATE_LOCKRES
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 1e232000f3f..36610bdf123 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -58,7 +58,7 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node);
static int dlm_recovery_thread(void *data);
void dlm_complete_recovery_thread(struct dlm_ctxt *dlm);
int dlm_launch_recovery_thread(struct dlm_ctxt *dlm);
-static void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
+void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
static int dlm_do_recovery(struct dlm_ctxt *dlm);
static int dlm_pick_recovery_master(struct dlm_ctxt *dlm);
@@ -78,15 +78,9 @@ static int dlm_send_mig_lockres_msg(struct dlm_ctxt *dlm,
u8 send_to,
struct dlm_lock_resource *res,
int total_locks);
-static int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 *real_master);
static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res,
struct dlm_migratable_lockres *mres);
-static int dlm_do_master_requery(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 nodenum, u8 *real_master);
static int dlm_send_finalize_reco_message(struct dlm_ctxt *dlm);
static int dlm_send_all_done_msg(struct dlm_ctxt *dlm,
u8 dead_node, u8 send_to);
@@ -165,7 +159,7 @@ void dlm_dispatch_work(void *data)
* RECOVERY THREAD
*/
-static void dlm_kick_recovery_thread(struct dlm_ctxt *dlm)
+void dlm_kick_recovery_thread(struct dlm_ctxt *dlm)
{
/* wake the recovery thread
* this will wake the reco thread in one of three places
@@ -1316,9 +1310,8 @@ leave:
-static int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 *real_master)
+int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res, u8 *real_master)
{
struct dlm_node_iter iter;
int nodenum;
@@ -1360,8 +1353,10 @@ static int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
ret = dlm_do_master_requery(dlm, res, nodenum, real_master);
if (ret < 0) {
mlog_errno(ret);
- BUG();
- /* TODO: need to figure a way to restart this */
+ if (!dlm_is_host_down(ret))
+ BUG();
+ /* host is down, so answer for that node would be
+ * DLM_LOCK_RES_OWNER_UNKNOWN. continue. */
}
if (*real_master != DLM_LOCK_RES_OWNER_UNKNOWN) {
mlog(0, "lock master is %u\n", *real_master);
@@ -1372,9 +1367,8 @@ static int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
}
-static int dlm_do_master_requery(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 nodenum, u8 *real_master)
+int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
+ u8 nodenum, u8 *real_master)
{
int ret = -EINVAL;
struct dlm_master_requery req;
@@ -1739,6 +1733,13 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm,
} else
continue;
+ if (!list_empty(&res->recovering)) {
+ mlog(0, "%s:%.*s: lockres was "
+ "marked RECOVERING, owner=%u\n",
+ dlm->name, res->lockname.len,
+ res->lockname.name, res->owner);
+ list_del_init(&res->recovering);
+ }
spin_lock(&res->spinlock);
dlm_change_lockres_owner(dlm, res, new_master);
res->state &= ~DLM_LOCK_RES_RECOVERING;
@@ -2258,7 +2259,10 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data)
mlog(0, "%u not in domain/live_nodes map "
"so setting it in reco map manually\n",
br->dead_node);
- set_bit(br->dead_node, dlm->recovery_map);
+ /* force the recovery cleanup in __dlm_hb_node_down
+ * both of these will be cleared in a moment */
+ set_bit(br->dead_node, dlm->domain_map);
+ set_bit(br->dead_node, dlm->live_nodes_map);
__dlm_hb_node_down(dlm, br->dead_node);
}
spin_unlock(&dlm->spinlock);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 19:38:25 +0000