zfs.h

xen虚拟机源代码安装包

/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef	_SYS_FS_ZFS_H
#define	_SYS_FS_ZFS_H


/*
 * On-disk version number.
 */
#define	SPA_VERSION_1			1ULL
#define	SPA_VERSION_2			2ULL
#define	SPA_VERSION_3			3ULL
#define	SPA_VERSION_4			4ULL
#define	SPA_VERSION_5			5ULL
#define	SPA_VERSION_6			6ULL
#define	SPA_VERSION_7			7ULL
#define	SPA_VERSION_8			8ULL
#define	SPA_VERSION_9			9ULL
#define	SPA_VERSION_10			10ULL
#define	SPA_VERSION			SPA_VERSION_10

/*
 * The following are configuration names used in the nvlist describing a pool's
 * configuration.
 */
#define	ZPOOL_CONFIG_VERSION		"version"
#define	ZPOOL_CONFIG_POOL_NAME		"name"
#define	ZPOOL_CONFIG_POOL_STATE		"state"
#define	ZPOOL_CONFIG_POOL_TXG		"txg"
#define	ZPOOL_CONFIG_POOL_GUID		"pool_guid"
#define	ZPOOL_CONFIG_CREATE_TXG		"create_txg"
#define	ZPOOL_CONFIG_TOP_GUID		"top_guid"
#define	ZPOOL_CONFIG_VDEV_TREE		"vdev_tree"
#define	ZPOOL_CONFIG_TYPE		"type"
#define	ZPOOL_CONFIG_CHILDREN		"children"
#define	ZPOOL_CONFIG_ID			"id"
#define	ZPOOL_CONFIG_GUID		"guid"
#define	ZPOOL_CONFIG_PATH		"path"
#define	ZPOOL_CONFIG_DEVID		"devid"
#define	ZPOOL_CONFIG_METASLAB_ARRAY	"metaslab_array"
#define	ZPOOL_CONFIG_METASLAB_SHIFT	"metaslab_shift"
#define	ZPOOL_CONFIG_ASHIFT		"ashift"
#define	ZPOOL_CONFIG_ASIZE		"asize"
#define	ZPOOL_CONFIG_DTL		"DTL"
#define	ZPOOL_CONFIG_STATS		"stats"
#define	ZPOOL_CONFIG_WHOLE_DISK		"whole_disk"
#define	ZPOOL_CONFIG_ERRCOUNT		"error_count"
#define	ZPOOL_CONFIG_NOT_PRESENT	"not_present"
#define	ZPOOL_CONFIG_SPARES		"spares"
#define	ZPOOL_CONFIG_IS_SPARE		"is_spare"
#define	ZPOOL_CONFIG_NPARITY		"nparity"
#define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"
#define	ZPOOL_CONFIG_L2CACHE		"l2cache"
/*
 * The persistent vdev state is stored as separate values rather than a single
 * 'vdev_state' entry.  This is because a device can be in multiple states, such
 * as offline and degraded.
 */
#define	ZPOOL_CONFIG_OFFLINE		"offline"
#define	ZPOOL_CONFIG_FAULTED		"faulted"
#define	ZPOOL_CONFIG_DEGRADED		"degraded"
#define	ZPOOL_CONFIG_REMOVED		"removed"

#define	VDEV_TYPE_ROOT			"root"
#define	VDEV_TYPE_MIRROR		"mirror"
#define	VDEV_TYPE_REPLACING		"replacing"
#define	VDEV_TYPE_RAIDZ			"raidz"
#define	VDEV_TYPE_DISK			"disk"
#define	VDEV_TYPE_FILE			"file"
#define	VDEV_TYPE_MISSING		"missing"
#define	VDEV_TYPE_SPARE			"spare"
#define	VDEV_TYPE_L2CACHE		"l2cache"

/*
 * pool state.  The following states are written to disk as part of the normal
 * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 * states are software abstractions used at various levels to communicate pool
 * state.
 */
typedef enum pool_state {
	POOL_STATE_ACTIVE = 0,		/* In active use		*/
	POOL_STATE_EXPORTED,		/* Explicitly exported		*/
	POOL_STATE_DESTROYED,		/* Explicitly destroyed		*/
	POOL_STATE_SPARE,		/* Reserved for hot spare use	*/
	POOL_STATE_L2CACHE,		/* Level 2 ARC device		*/
	POOL_STATE_UNINITIALIZED,	/* Internal spa_t state		*/
	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/
	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/
} pool_state_t;

#endif	/* _SYS_FS_ZFS_H */