311 строки
6.9 KiB
C
311 строки
6.9 KiB
C
/******************************************************************************
|
|
*******************************************************************************
|
|
**
|
|
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
|
|
**
|
|
** This copyrighted material is made available to anyone wishing to use,
|
|
** modify, copy, or redistribute it subject to the terms and conditions
|
|
** of the GNU General Public License v.2.
|
|
**
|
|
*******************************************************************************
|
|
******************************************************************************/
|
|
|
|
#include "dlm_internal.h"
|
|
#include "lockspace.h"
|
|
#include "member.h"
|
|
#include "dir.h"
|
|
#include "ast.h"
|
|
#include "recover.h"
|
|
#include "lowcomms.h"
|
|
#include "lock.h"
|
|
#include "requestqueue.h"
|
|
#include "recoverd.h"
|
|
|
|
|
|
/* If the start for which we're re-enabling locking (seq) has been superseded
|
|
by a newer stop (ls_recover_seq), we need to leave locking disabled. */
|
|
|
|
static int enable_locking(struct dlm_ls *ls, uint64_t seq)
|
|
{
|
|
int error = -EINTR;
|
|
|
|
spin_lock(&ls->ls_recover_lock);
|
|
if (ls->ls_recover_seq == seq) {
|
|
set_bit(LSFL_RUNNING, &ls->ls_flags);
|
|
up_write(&ls->ls_in_recovery);
|
|
error = 0;
|
|
}
|
|
spin_unlock(&ls->ls_recover_lock);
|
|
return error;
|
|
}
|
|
|
|
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();
|
|
|
|
/*
|
|
* This list of root rsb's will be the basis of most of the recovery
|
|
* routines.
|
|
*/
|
|
|
|
dlm_create_root_list(ls);
|
|
|
|
/*
|
|
* Free all the tossed rsb's so we don't have to recover them.
|
|
*/
|
|
|
|
dlm_clear_toss_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);
|
|
|
|
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;
|
|
}
|
|
|
|
/* The dlm_ls_start() that created the rv we take here may already have been
|
|
stopped via dlm_ls_stop(); in that case we need to leave the RECOVERY_STOP
|
|
flag set. */
|
|
|
|
static void do_ls_recovery(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_recover *rv = NULL;
|
|
|
|
spin_lock(&ls->ls_recover_lock);
|
|
rv = ls->ls_recover_args;
|
|
ls->ls_recover_args = NULL;
|
|
if (rv && ls->ls_recover_seq == rv->seq)
|
|
clear_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);
|
|
spin_unlock(&ls->ls_recover_lock);
|
|
|
|
if (rv) {
|
|
ls_recover(ls, rv);
|
|
kfree(rv->nodeids);
|
|
kfree(rv);
|
|
}
|
|
}
|
|
|
|
static int dlm_recoverd(void *arg)
|
|
{
|
|
struct dlm_ls *ls;
|
|
|
|
ls = dlm_find_lockspace_local(arg);
|
|
if (!ls) {
|
|
log_print("dlm_recoverd: no lockspace %p", arg);
|
|
return -1;
|
|
}
|
|
|
|
while (!kthread_should_stop()) {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (!test_bit(LSFL_WORK, &ls->ls_flags))
|
|
schedule();
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
if (test_and_clear_bit(LSFL_WORK, &ls->ls_flags))
|
|
do_ls_recovery(ls);
|
|
}
|
|
|
|
dlm_put_lockspace(ls);
|
|
return 0;
|
|
}
|
|
|
|
void dlm_recoverd_kick(struct dlm_ls *ls)
|
|
{
|
|
set_bit(LSFL_WORK, &ls->ls_flags);
|
|
wake_up_process(ls->ls_recoverd_task);
|
|
}
|
|
|
|
int dlm_recoverd_start(struct dlm_ls *ls)
|
|
{
|
|
struct task_struct *p;
|
|
int error = 0;
|
|
|
|
p = kthread_run(dlm_recoverd, ls, "dlm_recoverd");
|
|
if (IS_ERR(p))
|
|
error = PTR_ERR(p);
|
|
else
|
|
ls->ls_recoverd_task = p;
|
|
return error;
|
|
}
|
|
|
|
void dlm_recoverd_stop(struct dlm_ls *ls)
|
|
{
|
|
kthread_stop(ls->ls_recoverd_task);
|
|
}
|
|
|
|
void dlm_recoverd_suspend(struct dlm_ls *ls)
|
|
{
|
|
wake_up(&ls->ls_wait_general);
|
|
mutex_lock(&ls->ls_recoverd_active);
|
|
}
|
|
|
|
void dlm_recoverd_resume(struct dlm_ls *ls)
|
|
{
|
|
mutex_unlock(&ls->ls_recoverd_active);
|
|
}
|
|
|