[people/ms/linux.git] / fs / dlm / recoverd.c

// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
*******************************************************************************
**
**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
**  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
**
**
*******************************************************************************
******************************************************************************/

#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/* If the start for which we're re-enabling locking (seq) has been superseded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.

   We suspend dlm_recv threads here to avoid the race where dlm_recv a) sees
   locking stopped and b) adds a message to the requestqueue, but dlm_recoverd
   enables locking and clears the requestqueue between a and b. */

static int enable_locking(struct dlm_ls *ls, uint64_t seq)
{
	int error = -EINTR;

	down_write(&ls->ls_recv_active);

	spin_lock(&ls->ls_recover_lock);
	if (ls->ls_recover_seq == seq) {
		set_bit(LSFL_RUNNING, &ls->ls_flags);
		/* unblocks processes waiting to enter the dlm */
		up_write(&ls->ls_in_recovery);
		clear_bit(LSFL_RECOVER_LOCK, &ls->ls_flags);
		error = 0;
	}
	spin_unlock(&ls->ls_recover_lock);

	up_write(&ls->ls_recv_active);
	return error;
}

static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
{
	unsigned long start;
	int error, neg = 0;

	log_rinfo(ls, "dlm_recover %llu", (unsigned long long)rv->seq);

	mutex_lock(&ls->ls_recoverd_active);

	dlm_callback_suspend(ls);

	dlm_clear_toss(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.
	 *
	 * Due to the fact that we must report all membership changes to lsops
	 * or midcomms layer, it is not permitted to abort ls_recover() until
	 * this is done.
	 */

	error = dlm_recover_members(ls, rv, &neg);
	if (error) {
		log_rinfo(ls, "dlm_recover_members error %d", error);
		goto fail;
	}

	dlm_recover_dir_nodeid(ls);

	ls->ls_recover_dir_sent_res = 0;
	ls->ls_recover_dir_sent_msg = 0;
	ls->ls_recover_locks_in = 0;

	dlm_set_recover_status(ls, DLM_RS_NODES);

	error = dlm_recover_members_wait(ls);
	if (error) {
		log_rinfo(ls, "dlm_recover_members_wait error %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_rinfo(ls, "dlm_recover_directory error %d", error);
		goto fail;
	}

	dlm_set_recover_status(ls, DLM_RS_DIR);

	error = dlm_recover_directory_wait(ls);
	if (error) {
		log_rinfo(ls, "dlm_recover_directory_wait error %d", error);
		goto fail;
	}

	log_rinfo(ls, "dlm_recover_directory %u out %u messages",
		  ls->ls_recover_dir_sent_res, ls->ls_recover_dir_sent_msg);

	/*
	 * 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);

	if (dlm_recovery_stopped(ls)) {
		error = -EINTR;
		goto fail;
	}

	if (neg || dlm_no_directory(ls)) {
		/*
		 * Clear lkb's for departed nodes.
		 */

		dlm_recover_purge(ls);

		/*
		 * Get new master nodeid's for rsb's that were mastered on
		 * departed nodes.
		 */

		error = dlm_recover_masters(ls);
		if (error) {
			log_rinfo(ls, "dlm_recover_masters error %d", error);
			goto fail;
		}

		/*
		 * Send our locks on remastered rsb's to the new masters.
		 */

		error = dlm_recover_locks(ls);
		if (error) {
			log_rinfo(ls, "dlm_recover_locks error %d", error);
			goto fail;
		}

		dlm_set_recover_status(ls, DLM_RS_LOCKS);

		error = dlm_recover_locks_wait(ls);
		if (error) {
			log_rinfo(ls, "dlm_recover_locks_wait error %d", error);
			goto fail;
		}

		log_rinfo(ls, "dlm_recover_locks %u in",
			  ls->ls_recover_locks_in);

		/*
		 * 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_rinfo(ls, "dlm_recover_locks_wait error %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_rinfo(ls, "dlm_recover_done_wait error %d", error);
		goto fail;
	}

	dlm_clear_members_gone(ls);

	dlm_adjust_timeouts(ls);

	dlm_callback_resume(ls);

	error = enable_locking(ls, rv->seq);
	if (error) {
		log_rinfo(ls, "enable_locking error %d", error);
		goto fail;
	}

	error = dlm_process_requestqueue(ls);
	if (error) {
		log_rinfo(ls, "dlm_process_requestqueue error %d", error);
		goto fail;
	}

	error = dlm_recover_waiters_post(ls);
	if (error) {
		log_rinfo(ls, "dlm_recover_waiters_post error %d", error);
		goto fail;
	}

	dlm_recover_grant(ls);

	log_rinfo(ls, "dlm_recover %llu generation %u done: %u ms",
		  (unsigned long long)rv->seq, ls->ls_generation,
		  jiffies_to_msecs(jiffies - start));
	mutex_unlock(&ls->ls_recoverd_active);

	return 0;

 fail:
	dlm_release_root_list(ls);
	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;
	int error;

	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_RECOVER_STOP, &ls->ls_flags);
	spin_unlock(&ls->ls_recover_lock);

	if (rv) {
		error = ls_recover(ls, rv);
		switch (error) {
		case 0:
			ls->ls_recovery_result = 0;
			complete(&ls->ls_recovery_done);

			dlm_lsop_recover_done(ls);
			break;
		case -EINTR:
			/* if recovery was interrupted -EINTR we wait for the next
			 * ls_recover() iteration until it hopefully succeeds.
			 */
			log_rinfo(ls, "%s %llu interrupted and should be queued to run again",
				  __func__, (unsigned long long)rv->seq);
			break;
		default:
			log_rinfo(ls, "%s %llu error %d", __func__,
				  (unsigned long long)rv->seq, error);

			/* let new_lockspace() get aware of critical error */
			ls->ls_recovery_result = error;
			complete(&ls->ls_recovery_done);
			break;
		}

		kfree(rv->nodes);
		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;
	}

	down_write(&ls->ls_in_recovery);
	set_bit(LSFL_RECOVER_LOCK, &ls->ls_flags);
	wake_up(&ls->ls_recover_lock_wait);

	while (1) {
		/*
		 * We call kthread_should_stop() after set_current_state().
		 * This is because it works correctly if kthread_stop() is
		 * called just before set_current_state().
		 */
		set_current_state(TASK_INTERRUPTIBLE);
		if (kthread_should_stop()) {
			set_current_state(TASK_RUNNING);
			break;
		}
		if (!test_bit(LSFL_RECOVER_WORK, &ls->ls_flags) &&
		    !test_bit(LSFL_RECOVER_DOWN, &ls->ls_flags)) {
			if (kthread_should_stop())
				break;
			schedule();
		}
		set_current_state(TASK_RUNNING);

		if (test_and_clear_bit(LSFL_RECOVER_DOWN, &ls->ls_flags)) {
			down_write(&ls->ls_in_recovery);
			set_bit(LSFL_RECOVER_LOCK, &ls->ls_flags);
			wake_up(&ls->ls_recover_lock_wait);
		}

		if (test_and_clear_bit(LSFL_RECOVER_WORK, &ls->ls_flags))
			do_ls_recovery(ls);
	}

	if (test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags))
		up_write(&ls->ls_in_recovery);

	dlm_put_lockspace(ls);
	return 0;
}

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);
}
Commit	Line	Data
2522fe45	1	// SPDX-License-Identifier: GPL-2.0-only
e7fd4179 DT	2	/******************************************************************************
	3	*******************************************************************************
	4	**
	5	** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
60f98d18	6	** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
e7fd4179	7	**
e7fd4179 DT	8	**
	9	*******************************************************************************
	10	******************************************************************************/
	11
	12	#include "dlm_internal.h"
	13	#include "lockspace.h"
	14	#include "member.h"
	15	#include "dir.h"
	16	#include "ast.h"
	17	#include "recover.h"
	18	#include "lowcomms.h"
	19	#include "lock.h"
	20	#include "requestqueue.h"
	21	#include "recoverd.h"
	22
	23
	24	/* If the start for which we're re-enabling locking (seq) has been superseded
c36258b5 DT	25	by a newer stop (ls_recover_seq), we need to leave locking disabled.
	26
	27	We suspend dlm_recv threads here to avoid the race where dlm_recv a) sees
	28	locking stopped and b) adds a message to the requestqueue, but dlm_recoverd
	29	enables locking and clears the requestqueue between a and b. */
e7fd4179 DT	30
	31	static int enable_locking(struct dlm_ls *ls, uint64_t seq)
	32	{
	33	int error = -EINTR;
	34
c36258b5 DT	35	down_write(&ls->ls_recv_active);
c36258b5 DT	36
e7fd4179 DT	37	spin_lock(&ls->ls_recover_lock);
	38	if (ls->ls_recover_seq == seq) {
	39	set_bit(LSFL_RUNNING, &ls->ls_flags);
c36258b5	40	/* unblocks processes waiting to enter the dlm */
e7fd4179	41	up_write(&ls->ls_in_recovery);
475f230c	42	clear_bit(LSFL_RECOVER_LOCK, &ls->ls_flags);
e7fd4179 DT	43	error = 0;
	44	}
	45	spin_unlock(&ls->ls_recover_lock);
c36258b5 DT	46
c36258b5 DT	47	up_write(&ls->ls_recv_active);
e7fd4179 DT	48	return error;
	49	}
	50
	51	static int ls_recover(struct dlm_ls ls, struct dlm_recover rv)
	52	{
	53	unsigned long start;
	54	int error, neg = 0;
	55
075f0177	56	log_rinfo(ls, "dlm_recover %llu", (unsigned long long)rv->seq);
e7fd4179	57
90135925	58	mutex_lock(&ls->ls_recoverd_active);
e7fd4179	59
23e8e1aa	60	dlm_callback_suspend(ls);
e7fd4179	61
c04fecb4	62	dlm_clear_toss(ls);
e7fd4179 DT	63
e7fd4179 DT	64	/*
85f0379a DT	65	* This list of root rsb's will be the basis of most of the recovery
85f0379a DT	66	* routines.
e7fd4179 DT	67	*/
e7fd4179 DT	68
85f0379a	69	dlm_create_root_list(ls);
e7fd4179 DT	70
	71	/*
	72	* Add or remove nodes from the lockspace's ls_nodes list.
ca8031d9 AA	73	*
	74	* Due to the fact that we must report all membership changes to lsops
	75	* or midcomms layer, it is not permitted to abort ls_recover() until
	76	* this is done.
e7fd4179 DT	77	*/
	78
	79	error = dlm_recover_members(ls, rv, &neg);
	80	if (error) {
075f0177	81	log_rinfo(ls, "dlm_recover_members error %d", error);
e7fd4179 DT	82	goto fail;
e7fd4179 DT	83	}
f95a34c6	84
c04fecb4 DT	85	dlm_recover_dir_nodeid(ls);
	86
	87	ls->ls_recover_dir_sent_res = 0;
	88	ls->ls_recover_dir_sent_msg = 0;
4875647a DT	89	ls->ls_recover_locks_in = 0;
4875647a DT	90
f95a34c6 DT	91	dlm_set_recover_status(ls, DLM_RS_NODES);
	92
	93	error = dlm_recover_members_wait(ls);
	94	if (error) {
075f0177	95	log_rinfo(ls, "dlm_recover_members_wait error %d", error);
f95a34c6 DT	96	goto fail;
	97	}
	98
e7fd4179 DT	99	start = jiffies;
	100
	101	/*
	102	* Rebuild our own share of the directory by collecting from all other
	103	* nodes their master rsb names that hash to us.
	104	*/
	105
	106	error = dlm_recover_directory(ls);
	107	if (error) {
075f0177	108	log_rinfo(ls, "dlm_recover_directory error %d", error);
e7fd4179 DT	109	goto fail;
	110	}
	111
f95a34c6	112	dlm_set_recover_status(ls, DLM_RS_DIR);
e7fd4179 DT	113
	114	error = dlm_recover_directory_wait(ls);
	115	if (error) {
075f0177	116	log_rinfo(ls, "dlm_recover_directory_wait error %d", error);
e7fd4179 DT	117	goto fail;
	118	}
	119
075f0177	120	log_rinfo(ls, "dlm_recover_directory %u out %u messages",
c04fecb4 DT	121	ls->ls_recover_dir_sent_res, ls->ls_recover_dir_sent_msg);
c04fecb4 DT	122
e7fd4179 DT	123	/*
	124	* We may have outstanding operations that are waiting for a reply from
	125	* a failed node. Mark these to be resent after recovery. Unlock and
	126	* cancel ops can just be completed.
	127	*/
	128
	129	dlm_recover_waiters_pre(ls);
	130
e10249b1	131	if (dlm_recovery_stopped(ls)) {
aee742c9	132	error = -EINTR;
e7fd4179	133	goto fail;
aee742c9	134	}
e7fd4179 DT	135
	136	if (neg \|\| dlm_no_directory(ls)) {
	137	/*
	138	* Clear lkb's for departed nodes.
	139	*/
	140
4875647a	141	dlm_recover_purge(ls);
e7fd4179 DT	142
	143	/*
	144	* Get new master nodeid's for rsb's that were mastered on
	145	* departed nodes.
	146	*/
	147
	148	error = dlm_recover_masters(ls);
	149	if (error) {
075f0177	150	log_rinfo(ls, "dlm_recover_masters error %d", error);
e7fd4179 DT	151	goto fail;
	152	}
	153
	154	/*
	155	* Send our locks on remastered rsb's to the new masters.
	156	*/
	157
	158	error = dlm_recover_locks(ls);
	159	if (error) {
075f0177	160	log_rinfo(ls, "dlm_recover_locks error %d", error);
e7fd4179 DT	161	goto fail;
	162	}
	163
f95a34c6 DT	164	dlm_set_recover_status(ls, DLM_RS_LOCKS);
f95a34c6 DT	165
e7fd4179 DT	166	error = dlm_recover_locks_wait(ls);
e7fd4179 DT	167	if (error) {
075f0177	168	log_rinfo(ls, "dlm_recover_locks_wait error %d", error);
e7fd4179 DT	169	goto fail;
	170	}
	171
075f0177	172	log_rinfo(ls, "dlm_recover_locks %u in",
4875647a DT	173	ls->ls_recover_locks_in);
4875647a DT	174
e7fd4179 DT	175	/*
	176	* Finalize state in master rsb's now that all locks can be
	177	* checked. This includes conversion resolution and lvb
	178	* settings.
	179	*/
	180
	181	dlm_recover_rsbs(ls);
91c0dc93 DT	182	} else {
	183	/*
	184	* Other lockspace members may be going through the "neg" steps
	185	* while also adding us to the lockspace, in which case they'll
4b77f2c9	186	* be doing the recover_locks (RS_LOCKS) barrier.
91c0dc93 DT	187	*/
91c0dc93 DT	188	dlm_set_recover_status(ls, DLM_RS_LOCKS);
4b77f2c9 DT	189
	190	error = dlm_recover_locks_wait(ls);
	191	if (error) {
075f0177	192	log_rinfo(ls, "dlm_recover_locks_wait error %d", error);
4b77f2c9 DT	193	goto fail;
4b77f2c9 DT	194	}
e7fd4179 DT	195	}
	196
	197	dlm_release_root_list(ls);
	198
2896ee37 DT	199	/*
	200	* Purge directory-related requests that are saved in requestqueue.
	201	* All dir requests from before recovery are invalid now due to the dir
	202	* rebuild and will be resent by the requesting nodes.
	203	*/
	204
	205	dlm_purge_requestqueue(ls);
	206
e7fd4179	207	dlm_set_recover_status(ls, DLM_RS_DONE);
f95a34c6	208
e7fd4179 DT	209	error = dlm_recover_done_wait(ls);
e7fd4179 DT	210	if (error) {
075f0177	211	log_rinfo(ls, "dlm_recover_done_wait error %d", error);
e7fd4179 DT	212	goto fail;
	213	}
	214
	215	dlm_clear_members_gone(ls);
	216
3ae1acf9 DT	217	dlm_adjust_timeouts(ls);
3ae1acf9 DT	218
23e8e1aa DT	219	dlm_callback_resume(ls);
23e8e1aa DT	220
e7fd4179 DT	221	error = enable_locking(ls, rv->seq);
e7fd4179 DT	222	if (error) {
075f0177	223	log_rinfo(ls, "enable_locking error %d", error);
e7fd4179 DT	224	goto fail;
	225	}
	226
	227	error = dlm_process_requestqueue(ls);
	228	if (error) {
075f0177	229	log_rinfo(ls, "dlm_process_requestqueue error %d", error);
e7fd4179 DT	230	goto fail;
	231	}
	232
	233	error = dlm_recover_waiters_post(ls);
	234	if (error) {
075f0177	235	log_rinfo(ls, "dlm_recover_waiters_post error %d", error);
e7fd4179 DT	236	goto fail;
	237	}
	238
4875647a	239	dlm_recover_grant(ls);
e7fd4179	240
075f0177	241	log_rinfo(ls, "dlm_recover %llu generation %u done: %u ms",
60f98d18	242	(unsigned long long)rv->seq, ls->ls_generation,
e7fd4179	243	jiffies_to_msecs(jiffies - start));
90135925	244	mutex_unlock(&ls->ls_recoverd_active);
e7fd4179 DT	245
	246	return 0;
	247
	248	fail:
	249	dlm_release_root_list(ls);
90135925	250	mutex_unlock(&ls->ls_recoverd_active);
682bb91b	251
e7fd4179 DT	252	return error;
	253	}
	254
2cdc98aa DT	255	/* The dlm_ls_start() that created the rv we take here may already have been
	256	stopped via dlm_ls_stop(); in that case we need to leave the RECOVERY_STOP
	257	flag set. */
	258
e7fd4179 DT	259	static void do_ls_recovery(struct dlm_ls *ls)
	260	{
	261	struct dlm_recover *rv = NULL;
3182599f	262	int error;
e7fd4179 DT	263
	264	spin_lock(&ls->ls_recover_lock);
	265	rv = ls->ls_recover_args;
	266	ls->ls_recover_args = NULL;
2cdc98aa	267	if (rv && ls->ls_recover_seq == rv->seq)
475f230c	268	clear_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
e7fd4179 DT	269	spin_unlock(&ls->ls_recover_lock);
	270
	271	if (rv) {
3182599f AA	272	error = ls_recover(ls, rv);
	273	switch (error) {
	274	case 0:
	275	ls->ls_recovery_result = 0;
	276	complete(&ls->ls_recovery_done);
	277
	278	dlm_lsop_recover_done(ls);
	279	break;
	280	case -EINTR:
	281	/* if recovery was interrupted -EINTR we wait for the next
	282	* ls_recover() iteration until it hopefully succeeds.
	283	*/
	284	log_rinfo(ls, "%s %llu interrupted and should be queued to run again",
	285	__func__, (unsigned long long)rv->seq);
	286	break;
	287	default:
	288	log_rinfo(ls, "%s %llu error %d", __func__,
	289	(unsigned long long)rv->seq, error);
	290
	291	/* let new_lockspace() get aware of critical error */
	292	ls->ls_recovery_result = error;
	293	complete(&ls->ls_recovery_done);
	294	break;
	295	}
	296
60f98d18	297	kfree(rv->nodes);
e7fd4179 DT	298	kfree(rv);
	299	}
	300	}
	301
	302	static int dlm_recoverd(void *arg)
	303	{
	304	struct dlm_ls *ls;
	305
	306	ls = dlm_find_lockspace_local(arg);
5f88f1ea DT	307	if (!ls) {
	308	log_print("dlm_recoverd: no lockspace %p", arg);
	309	return -1;
	310	}
e7fd4179	311
475f230c DT	312	down_write(&ls->ls_in_recovery);
	313	set_bit(LSFL_RECOVER_LOCK, &ls->ls_flags);
	314	wake_up(&ls->ls_recover_lock_wait);
	315
e412f920	316	while (1) {
	317	/*
	318	* We call kthread_should_stop() after set_current_state().
	319	* This is because it works correctly if kthread_stop() is
	320	* called just before set_current_state().
	321	*/
e7fd4179	322	set_current_state(TASK_INTERRUPTIBLE);
e412f920	323	if (kthread_should_stop()) {
	324	set_current_state(TASK_RUNNING);
	325	break;
	326	}
475f230c	327	if (!test_bit(LSFL_RECOVER_WORK, &ls->ls_flags) &&
9e1b0211 GJ	328	!test_bit(LSFL_RECOVER_DOWN, &ls->ls_flags)) {
	329	if (kthread_should_stop())
	330	break;
e7fd4179	331	schedule();
9e1b0211	332	}
e7fd4179 DT	333	set_current_state(TASK_RUNNING);
e7fd4179 DT	334
475f230c DT	335	if (test_and_clear_bit(LSFL_RECOVER_DOWN, &ls->ls_flags)) {
	336	down_write(&ls->ls_in_recovery);
	337	set_bit(LSFL_RECOVER_LOCK, &ls->ls_flags);
	338	wake_up(&ls->ls_recover_lock_wait);
	339	}
	340
	341	if (test_and_clear_bit(LSFL_RECOVER_WORK, &ls->ls_flags))
e7fd4179 DT	342	do_ls_recovery(ls);
	343	}
	344
475f230c DT	345	if (test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags))
	346	up_write(&ls->ls_in_recovery);
	347
e7fd4179 DT	348	dlm_put_lockspace(ls);
	349	return 0;
	350	}
	351
e7fd4179 DT	352	int dlm_recoverd_start(struct dlm_ls *ls)
	353	{
	354	struct task_struct *p;
	355	int error = 0;
	356
	357	p = kthread_run(dlm_recoverd, ls, "dlm_recoverd");
	358	if (IS_ERR(p))
	359	error = PTR_ERR(p);
	360	else
	361	ls->ls_recoverd_task = p;
	362	return error;
	363	}
	364
	365	void dlm_recoverd_stop(struct dlm_ls *ls)
	366	{
	367	kthread_stop(ls->ls_recoverd_task);
	368	}
	369
	370	void dlm_recoverd_suspend(struct dlm_ls *ls)
	371	{
f6db1b8e	372	wake_up(&ls->ls_wait_general);
90135925	373	mutex_lock(&ls->ls_recoverd_active);
e7fd4179 DT	374	}
	375
	376	void dlm_recoverd_resume(struct dlm_ls *ls)
	377	{
90135925	378	mutex_unlock(&ls->ls_recoverd_active);
e7fd4179 DT	379	}
e7fd4179 DT	380