void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
{
int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) {
log_debug(ls, "ignoring recovery message %x from %d",
rc->rc_type, nodeid);
goto out;
}
if (is_old_reply(ls, rc))
goto out;
switch (rc->rc_type) {
case DLM_RCOM_STATUS:
receive_rcom_status(ls, rc);
break;
case DLM_RCOM_NAMES:
receive_rcom_names(ls, rc);
break;
case DLM_RCOM_LOOKUP:
receive_rcom_lookup(ls, rc);
break;
case DLM_RCOM_LOCK:
if (rc->rc_header.h_length < lock_size)
goto Eshort;
receive_rcom_lock(ls, rc);
break;
case DLM_RCOM_STATUS_REPLY:
receive_sync_reply(ls, rc);
break;
case DLM_RCOM_NAMES_REPLY:
receive_sync_reply(ls, rc);
break;
case DLM_RCOM_LOOKUP_REPLY:
receive_rcom_lookup_reply(ls, rc);
break;
case DLM_RCOM_LOCK_REPLY:
if (rc->rc_header.h_length < lock_size)
goto Eshort;
dlm_recover_process_copy(ls, rc);
break;
default:
log_error(ls, "receive_rcom bad type %d", rc->rc_type);
}
out:
return;
Eshort:
log_error(ls, "recovery message %x from %d is too short",
rc->rc_type, nodeid);
}
void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
{
if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) {
log_debug(ls, "ignoring recovery message %x from %d",
rc->rc_type, nodeid);
goto out;
}
if (is_old_reply(ls, rc))
goto out;
switch (rc->rc_type) {
case DLM_RCOM_STATUS:
receive_rcom_status(ls, rc);
break;
case DLM_RCOM_NAMES:
receive_rcom_names(ls, rc);
break;
case DLM_RCOM_LOOKUP:
receive_rcom_lookup(ls, rc);
break;
case DLM_RCOM_LOCK:
receive_rcom_lock(ls, rc);
break;
case DLM_RCOM_STATUS_REPLY:
receive_rcom_status_reply(ls, rc);
break;
case DLM_RCOM_NAMES_REPLY:
receive_rcom_names_reply(ls, rc);
break;
case DLM_RCOM_LOOKUP_REPLY:
receive_rcom_lookup_reply(ls, rc);
break;
case DLM_RCOM_LOCK_REPLY:
receive_rcom_lock_reply(ls, rc);
break;
default:
DLM_ASSERT(0, printk("rc_type=%x\n", rc->rc_type););
}
static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
{
unsigned long start;
int error, neg = 0;
log_debug(ls, "recover %llx", (unsigned long long)rv->seq);
mutex_lock(&ls->ls_recoverd_active);
/*
* Suspending and resuming dlm_astd ensures that no lkb's from this ls
* will be processed by dlm_astd during recovery.
*/
dlm_astd_suspend();
dlm_astd_resume();
/*
* Free non-master tossed rsb's. Master rsb's are kept on toss
* list and put on root list to be included in resdir recovery.
*/
dlm_clear_toss_list(ls);
/*
* This list of root rsb's will be the basis of most of the recovery
* routines.
*/
dlm_create_root_list(ls);
/*
* Add or remove nodes from the lockspace's ls_nodes list.
* Also waits for all nodes to complete dlm_recover_members.
*/
error = dlm_recover_members(ls, rv, &neg);
if (error) {
log_debug(ls, "recover_members failed %d", error);
goto fail;
}
start = jiffies;
/*
* Rebuild our own share of the directory by collecting from all other
* nodes their master rsb names that hash to us.
*/
error = dlm_recover_directory(ls);
if (error) {
log_debug(ls, "recover_directory failed %d", error);
goto fail;
}
/*
* Wait for all nodes to complete directory rebuild.
*/
error = dlm_recover_directory_wait(ls);
if (error) {
log_debug(ls, "recover_directory_wait failed %d", error);
goto fail;
}
/*
* We may have outstanding operations that are waiting for a reply from
* a failed node. Mark these to be resent after recovery. Unlock and
* cancel ops can just be completed.
*/
dlm_recover_waiters_pre(ls);
error = dlm_recovery_stopped(ls);
if (error)
goto fail;
if (neg || dlm_no_directory(ls)) {
/*
* Clear lkb's for departed nodes.
*/
dlm_purge_locks(ls);
/*
* Get new master nodeid's for rsb's that were mastered on
* departed nodes.
*/
error = dlm_recover_masters(ls);
if (error) {
log_debug(ls, "recover_masters failed %d", error);
goto fail;
}
/*
* Send our locks on remastered rsb's to the new masters.
*/
error = dlm_recover_locks(ls);
if (error) {
log_debug(ls, "recover_locks failed %d", error);
goto fail;
}
error = dlm_recover_locks_wait(ls);
if (error) {
log_debug(ls, "recover_locks_wait failed %d", error);
goto fail;
}
/*
* Finalize state in master rsb's now that all locks can be
* checked. This includes conversion resolution and lvb
* settings.
*/
dlm_recover_rsbs(ls);
} else {
/*
* Other lockspace members may be going through the "neg" steps
* while also adding us to the lockspace, in which case they'll
* be doing the recover_locks (RS_LOCKS) barrier.
*/
dlm_set_recover_status(ls, DLM_RS_LOCKS);
error = dlm_recover_locks_wait(ls);
if (error) {
log_debug(ls, "recover_locks_wait failed %d", error);
goto fail;
}
}
dlm_release_root_list(ls);
/*
* Purge directory-related requests that are saved in requestqueue.
* All dir requests from before recovery are invalid now due to the dir
* rebuild and will be resent by the requesting nodes.
*/
dlm_purge_requestqueue(ls);
dlm_set_recover_status(ls, DLM_RS_DONE);
error = dlm_recover_done_wait(ls);
if (error) {
log_debug(ls, "recover_done_wait failed %d", error);
goto fail;
}
dlm_clear_members_gone(ls);
dlm_adjust_timeouts(ls);
error = enable_locking(ls, rv->seq);
if (error) {
log_debug(ls, "enable_locking failed %d", error);
goto fail;
}
error = dlm_process_requestqueue(ls);
if (error) {
log_debug(ls, "process_requestqueue failed %d", error);
goto fail;
}
error = dlm_recover_waiters_post(ls);
if (error) {
log_debug(ls, "recover_waiters_post failed %d", error);
goto fail;
}
dlm_grant_after_purge(ls);
dlm_astd_wake();
log_debug(ls, "recover %llx done: %u ms",
(unsigned long long)rv->seq,
jiffies_to_msecs(jiffies - start));
mutex_unlock(&ls->ls_recoverd_active);
return 0;
fail:
dlm_release_root_list(ls);
log_debug(ls, "recover %llx error %d",
(unsigned long long)rv->seq, error);
mutex_unlock(&ls->ls_recoverd_active);
return error;
}
void dlm_receive_rcom(struct dlm_header *hd, int nodeid)
{
struct dlm_rcom *rc = (struct dlm_rcom *) hd;
struct dlm_ls *ls;
dlm_rcom_in(rc);
/* If the lockspace doesn't exist then still send a status message
back; it's possible that it just doesn't have its global_id yet. */
ls = dlm_find_lockspace_global(hd->h_lockspace);
if (!ls) {
log_print("lockspace %x from %d type %x not found",
hd->h_lockspace, nodeid, rc->rc_type);
if (rc->rc_type == DLM_RCOM_STATUS)
send_ls_not_ready(nodeid, rc);
return;
}
if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) {
log_debug(ls, "ignoring recovery message %x from %d",
rc->rc_type, nodeid);
goto out;
}
if (is_old_reply(ls, rc))
goto out;
if (nodeid != rc->rc_header.h_nodeid) {
log_error(ls, "bad rcom nodeid %d from %d",
rc->rc_header.h_nodeid, nodeid);
goto out;
}
switch (rc->rc_type) {
case DLM_RCOM_STATUS:
receive_rcom_status(ls, rc);
break;
case DLM_RCOM_NAMES:
receive_rcom_names(ls, rc);
break;
case DLM_RCOM_LOOKUP:
receive_rcom_lookup(ls, rc);
break;
case DLM_RCOM_LOCK:
receive_rcom_lock(ls, rc);
break;
case DLM_RCOM_STATUS_REPLY:
receive_rcom_status_reply(ls, rc);
break;
case DLM_RCOM_NAMES_REPLY:
receive_rcom_names_reply(ls, rc);
break;
case DLM_RCOM_LOOKUP_REPLY:
receive_rcom_lookup_reply(ls, rc);
break;
case DLM_RCOM_LOCK_REPLY:
receive_rcom_lock_reply(ls, rc);
break;
default:
DLM_ASSERT(0, printk("rc_type=%x\n", rc->rc_type););
}
