path: root/drivers/md/dm-raid1.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2003 Sistina Software Limited.
 * Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
 *
 * This file is released under the GPL.
 */

#include "dm-bio-record.h"

#include <linux/init.h>
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/device-mapper.h>
#include <linux/dm-io.h>
#include <linux/dm-dirty-log.h>
#include <linux/dm-kcopyd.h>
#include <linux/dm-region-hash.h>

static struct workqueue_struct *dm_raid1_wq;

#define DM_MSG_PREFIX "raid1"

#define MAX_RECOVERY 1	/* Maximum number of regions recovered in parallel. */

#define MAX_NR_MIRRORS	(DM_KCOPYD_MAX_REGIONS + 1)

#define DM_RAID1_HANDLE_ERRORS	0x01
#define DM_RAID1_KEEP_LOG	0x02
#define errors_handled(p)	((p)->features & DM_RAID1_HANDLE_ERRORS)
#define keep_log(p)		((p)->features & DM_RAID1_KEEP_LOG)

static DECLARE_WAIT_QUEUE_HEAD(_kmirrord_recovery_stopped);

/*
 *---------------------------------------------------------------
 * Mirror set structures.
 *---------------------------------------------------------------
 */
enum dm_raid1_error {
	DM_RAI