/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#ifndef	_SYS_FS_ZFS_H

#define	_SYS_FS_ZFS_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#ifdef	__cplusplus

extern "C" {

#endif

/*

 * Types and constants shared between userland and the kernel.

 */

/*

 * Each dataset can be one of the following types.  These constants can be

 * combined into masks that can be passed to various functions.

 */

typedef enum {

	ZFS_TYPE_FILESYSTEM	= 0x1,

	ZFS_TYPE_SNAPSHOT	= 0x2,

	ZFS_TYPE_VOLUME		= 0x4,

	ZFS_TYPE_POOL		= 0x8

} zfs_type_t;

#define	ZFS_TYPE_DATASET	\

	(ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)

/*

 * Dataset properties are identified by these constants and must be added to

 * the end of this list to ensure that external consumers are not affected

 * by the change. If you make any changes to this list, be sure to update

 * the property table in usr/src/common/zfs/zfs_prop.c.

 */

typedef enum {

	ZFS_PROP_TYPE,

	ZFS_PROP_CREATION,

	ZFS_PROP_USED,

	ZFS_PROP_AVAILABLE,

	ZFS_PROP_REFERENCED,

	ZFS_PROP_COMPRESSRATIO,

	ZFS_PROP_MOUNTED,

	ZFS_PROP_ORIGIN,

	ZFS_PROP_QUOTA,

	ZFS_PROP_RESERVATION,

	ZFS_PROP_VOLSIZE,

	ZFS_PROP_VOLBLOCKSIZE,

	ZFS_PROP_RECORDSIZE,

	ZFS_PROP_MOUNTPOINT,

	ZFS_PROP_SHARENFS,

	ZFS_PROP_CHECKSUM,

	ZFS_PROP_COMPRESSION,

	ZFS_PROP_ATIME,

	ZFS_PROP_DEVICES,

	ZFS_PROP_EXEC,

	ZFS_PROP_SETUID,

	ZFS_PROP_READONLY,

	ZFS_PROP_ZONED,

	ZFS_PROP_SNAPDIR,

	ZFS_PROP_ACLMODE,

	ZFS_PROP_ACLINHERIT,

	ZFS_PROP_CREATETXG,		/* not exposed to the user */

	ZFS_PROP_NAME,			/* not exposed to the user */

	ZFS_PROP_CANMOUNT,

	ZFS_PROP_SHAREISCSI,

	ZFS_PROP_ISCSIOPTIONS,		/* not exposed to the user */

	ZFS_PROP_XATTR,

	ZFS_PROP_NUMCLONES,		/* not exposed to the user */

	ZFS_PROP_COPIES,

	ZFS_PROP_VERSION,

	ZFS_PROP_UTF8ONLY,

	ZFS_PROP_NORMALIZE,

	ZFS_PROP_CASE,

	ZFS_PROP_VSCAN,

	ZFS_PROP_NBMAND,

	ZFS_PROP_SHARESMB,

	ZFS_PROP_REFQUOTA,

	ZFS_PROP_REFRESERVATION,

	ZFS_NUM_PROPS

} zfs_prop_t;

/*

 * Pool properties are identified by these constants and must be added to the

 * end of this list to ensure that external conumsers are not affected

 * by the change. If you make any changes to this list, be sure to update

 * the property table in usr/src/common/zfs/zpool_prop.c.

 */

typedef enum {

	ZPOOL_PROP_NAME,

	ZPOOL_PROP_SIZE,

	ZPOOL_PROP_USED,

	ZPOOL_PROP_AVAILABLE,

	ZPOOL_PROP_CAPACITY,

	ZPOOL_PROP_ALTROOT,

	ZPOOL_PROP_HEALTH,

	ZPOOL_PROP_GUID,

	ZPOOL_PROP_VERSION,

	ZPOOL_PROP_BOOTFS,

	ZPOOL_PROP_DELEGATION,

	ZPOOL_PROP_AUTOREPLACE,

	ZPOOL_PROP_CACHEFILE,

	ZPOOL_PROP_FAILUREMODE,

	ZPOOL_NUM_PROPS

} zpool_prop_t;

#define	ZPROP_CONT		-2

#define	ZPROP_INVAL		-1

#define	ZPROP_VALUE		"value"

#define	ZPROP_SOURCE		"source"

typedef enum {

	ZPROP_SRC_NONE = 0x1,

	ZPROP_SRC_DEFAULT = 0x2,

	ZPROP_SRC_TEMPORARY = 0x4,

	ZPROP_SRC_LOCAL = 0x8,

	ZPROP_SRC_INHERITED = 0x10

} zprop_source_t;

#define	ZPROP_SRC_ALL	0x1f

typedef int (*zprop_func)(int, void *);

/*

 * Dataset property functions shared between libzfs and kernel.

 */

const char *zfs_prop_default_string(zfs_prop_t);

uint64_t zfs_prop_default_numeric(zfs_prop_t);

boolean_t zfs_prop_readonly(zfs_prop_t);

boolean_t zfs_prop_inheritable(zfs_prop_t);

boolean_t zfs_prop_setonce(zfs_prop_t);

const char *zfs_prop_to_name(zfs_prop_t);

zfs_prop_t zfs_name_to_prop(const char *);

boolean_t zfs_prop_user(const char *);

int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);

int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);

int zfs_prop_valid_for_type(int, zfs_type_t);

/*

 * Pool property functions shared between libzfs and kernel.

 */

zpool_prop_t zpool_name_to_prop(const char *);

const char *zpool_prop_to_name(zpool_prop_t);

const char *zpool_prop_default_string(zpool_prop_t);

uint64_t zpool_prop_default_numeric(zpool_prop_t);

boolean_t zpool_prop_readonly(zpool_prop_t);

int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);

int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);

/*

 * Definitions for the Delegation.

 */

typedef enum {

	ZFS_DELEG_WHO_UNKNOWN = 0,

	ZFS_DELEG_USER = 'u',

	ZFS_DELEG_USER_SETS = 'U',

	ZFS_DELEG_GROUP = 'g',

	ZFS_DELEG_GROUP_SETS = 'G',

	ZFS_DELEG_EVERYONE = 'e',

	ZFS_DELEG_EVERYONE_SETS = 'E',

	ZFS_DELEG_CREATE = 'c',

	ZFS_DELEG_CREATE_SETS = 'C',

	ZFS_DELEG_NAMED_SET = 's',

	ZFS_DELEG_NAMED_SET_SETS = 'S'

} zfs_deleg_who_type_t;

typedef enum {

	ZFS_DELEG_NONE = 0,

	ZFS_DELEG_PERM_LOCAL = 1,

	ZFS_DELEG_PERM_DESCENDENT = 2,

	ZFS_DELEG_PERM_LOCALDESCENDENT = 3,

	ZFS_DELEG_PERM_CREATE = 4

} zfs_deleg_inherit_t;

#define	ZFS_DELEG_PERM_UID	"uid"

#define	ZFS_DELEG_PERM_GID	"gid"

#define	ZFS_DELEG_PERM_GROUPS	"groups"

typedef enum zfs_share_op {

	ZFS_SHARE_NFS = 0,

	ZFS_UNSHARE_NFS = 1,

	ZFS_SHARE_SMB = 2,

	ZFS_UNSHARE_SMB = 3

} zfs_share_op_t;

/*

 * 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

/*

 * When bumping up SPA_VERSION, make sure GRUB ZFS understand the on-disk

 * format change. Go to usr/src/grub/grub-0.95/stage2/{zfs-include/, fsys_zfs*},

 * and do the appropriate changes.

 */

/*

 * Symbolic names for the changes that caused a SPA_VERSION switch.

 * Used in the code when checking for presence or absence of a feature.

 * Feel free to define multiple symbolic names for each version if there

 * were multiple changes to on-disk structures during that version.

 *

 * NOTE: When checking the current SPA_VERSION in your code, be sure

 *       to use spa_version() since it reports the version of the

 *       last synced uberblock.  Checking the in-flight version can

 *       be dangerous in some cases.

 */

#define	SPA_VERSION_INITIAL		SPA_VERSION_1

#define	SPA_VERSION_DITTO_BLOCKS	SPA_VERSION_2

#define	SPA_VERSION_SPARES		SPA_VERSION_3

#define	SPA_VERSION_RAID6		SPA_VERSION_3

#define	SPA_VERSION_BPLIST_ACCOUNT	SPA_VERSION_3

#define	SPA_VERSION_RAIDZ_DEFLATE	SPA_VERSION_3

#define	SPA_VERSION_DNODE_BYTES		SPA_VERSION_3

#define	SPA_VERSION_ZPOOL_HISTORY	SPA_VERSION_4

#define	SPA_VERSION_GZIP_COMPRESSION	SPA_VERSION_5

#define	SPA_VERSION_BOOTFS		SPA_VERSION_6

#define	SPA_VERSION_SLOGS		SPA_VERSION_7

#define	SPA_VERSION_DELEGATED_PERMS	SPA_VERSION_8

#define	SPA_VERSION_FUID		SPA_VERSION_9

#define	SPA_VERSION_NORMALIZATION	SPA_VERSION_9

#define	SPA_VERSION_REFRESERVATION	SPA_VERSION_9

#define	SPA_VERSION_REFQUOTA		SPA_VERSION_9

#define	SPA_VERSION_UNIQUE_ACCURATE	SPA_VERSION_9

/*

 * ZPL version - rev'd whenever an incompatible on-disk format change

 * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must

 * also update the version_table[] and help message in zfs_prop.c.

 *

 * When changing, be sure to teach GRUB how to read the new format!

 * See usr/src/grub/grub-0.95/stage2/{zfs-include/,fsys_zfs*}

 */

#define	ZPL_VERSION_1			1ULL

#define	ZPL_VERSION_2			2ULL

#define	ZPL_VERSION_3			3ULL

#define	ZPL_VERSION			ZPL_VERSION_3

#define	ZPL_VERSION_STRING		"3"

#define	ZPL_VERSION_INITIAL		ZPL_VERSION_1

#define	ZPL_VERSION_DIRENT_TYPE		ZPL_VERSION_2

#define	ZPL_VERSION_FUID		ZPL_VERSION_3

#define	ZPL_VERSION_SYSATTR		ZPL_VERSION_3

/*

 * 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_HOSTID		"hostid"

#define	ZPOOL_CONFIG_HOSTNAME		"hostname"

#define	ZPOOL_CONFIG_TIMESTAMP		"timestamp" /* not stored on disk */

#define	ZPOOL_CONFIG_UNSPARE		"unspare"

#define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"

#define	ZPOOL_CONFIG_IS_LOG		"is_log"

/*

 * 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_LOG			"log"

/*

 * This is needed in userland to report the minimum necessary device size.

 */

#define	SPA_MINDEVSIZE		(64ULL << 20)

/*

 * The location of the pool configuration repository, shared between kernel and

 * userland.

 */

#define	ZPOOL_CACHE_DIR		"/etc/zfs"

#define	ZPOOL_CACHE_FILE	"zpool.cache"

#define	ZPOOL_CACHE_TMP		".zpool.cache"

#define	ZPOOL_CACHE		ZPOOL_CACHE_DIR "/" ZPOOL_CACHE_FILE

/*

 * vdev states are ordered from least to most healthy.

 * A vdev that's CANT_OPEN or below is considered unusable.

 */

typedef enum vdev_state {

	VDEV_STATE_UNKNOWN = 0,	/* Uninitialized vdev			*/

	VDEV_STATE_CLOSED,	/* Not currently open			*/

	VDEV_STATE_OFFLINE,	/* Not allowed to open			*/

	VDEV_STATE_REMOVED,	/* Explicitly removed from system	*/

	VDEV_STATE_CANT_OPEN,	/* Tried to open, but failed		*/

	VDEV_STATE_FAULTED,	/* External request to fault device	*/

	VDEV_STATE_DEGRADED,	/* Replicated vdev with unhealthy kids	*/

	VDEV_STATE_HEALTHY	/* Presumed good			*/

} vdev_state_t;

#define	VDEV_STATE_ONLINE	VDEV_STATE_HEALTHY

/*

 * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field

 * of the vdev stats structure uses these constants to distinguish why.

 */

typedef enum vdev_aux {

	VDEV_AUX_NONE,		/* no error				*/

	VDEV_AUX_OPEN_FAILED,	/* ldi_open_*() or vn_open() failed	*/

	VDEV_AUX_CORRUPT_DATA,	/* bad label or disk contents		*/

	VDEV_AUX_NO_REPLICAS,	/* insufficient number of replicas	*/

	VDEV_AUX_BAD_GUID_SUM,	/* vdev guid sum doesn't match		*/

	VDEV_AUX_TOO_SMALL,	/* vdev size is too small		*/

	VDEV_AUX_BAD_LABEL,	/* the label is OK but invalid		*/

	VDEV_AUX_VERSION_NEWER,	/* on-disk version is too new		*/

	VDEV_AUX_VERSION_OLDER,	/* on-disk version is too old		*/

	VDEV_AUX_SPARED,	/* hot spare used in another pool	*/

	VDEV_AUX_ERR_EXCEEDED	/* too many errors			*/

} vdev_aux_t;

/*

 * pool state.  The following states are written to disk as part of the normal

 */

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_UNINITIALIZED,	/* Internal spa_t state		*/

	POOL_STATE_IO_FAILURE,		/* Internal pool state		*/

	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/

	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/

} pool_state_t;

/*

 * Scrub types.

 */

typedef enum pool_scrub_type {

	POOL_SCRUB_NONE,

	POOL_SCRUB_RESILVER,

	POOL_SCRUB_EVERYTHING,

	POOL_SCRUB_TYPES

} pool_scrub_type_t;

/*

 * ZIO types.  Needed to interpret vdev statistics below.

 */

typedef enum zio_type {

	ZIO_TYPE_NULL = 0,

	ZIO_TYPE_READ,

	ZIO_TYPE_WRITE,

	ZIO_TYPE_FREE,

	ZIO_TYPE_CLAIM,

	ZIO_TYPE_IOCTL,

	ZIO_TYPES

} zio_type_t;

/*

 * Vdev statistics.  Note: all fields should be 64-bit because this

 * is passed between kernel and userland as an nvlist uint64 array.

 */

typedef struct vdev_stat {

	hrtime_t	vs_timestamp;		/* time since vdev load	*/

	uint64_t	vs_state;		/* vdev state		*/

	uint64_t	vs_aux;			/* see vdev_aux_t	*/

	uint64_t	vs_alloc;		/* space allocated	*/

	uint64_t	vs_space;		/* total capacity	*/

	uint64_t	vs_dspace;		/* deflated capacity	*/

	uint64_t	vs_rsize;		/* replaceable dev size */

	uint64_t	vs_ops[ZIO_TYPES];	/* operation count	*/

	uint64_t	vs_bytes[ZIO_TYPES];	/* bytes read/written	*/

	uint64_t	vs_read_errors;		/* read errors		*/

	uint64_t	vs_write_errors;	/* write errors		*/

	uint64_t	vs_checksum_errors;	/* checksum errors	*/

	uint64_t	vs_self_healed;		/* self-healed bytes	*/

	uint64_t	vs_scrub_type;		/* pool_scrub_type_t	*/

	uint64_t	vs_scrub_complete;	/* completed?		*/

	uint64_t	vs_scrub_examined;	/* bytes examined; top	*/

	uint64_t	vs_scrub_repaired;	/* bytes repaired; leaf	*/

	uint64_t	vs_scrub_errors;	/* errors during scrub	*/

	uint64_t	vs_scrub_start;		/* UTC scrub start time	*/

	uint64_t	vs_scrub_end;		/* UTC scrub end time	*/

} vdev_stat_t;

#define	ZFS_DRIVER	"zfs"

#define	ZFS_DEV		"/dev/zfs"

/*

 * zvol paths.  Irritatingly, the devfsadm interfaces want all these

 * paths without the /dev prefix, but for some things, we want the

 * /dev prefix.  Below are the names without /dev.

 */

#define	ZVOL_DEV_DIR	"zvol/dsk"

#define	ZVOL_RDEV_DIR	"zvol/rdsk"

/*

 * And here are the things we need with /dev, etc. in front of them.

 */

#define	ZVOL_PSEUDO_DEV		"/devices/pseudo/zvol@0:"

#define	ZVOL_FULL_DEV_DIR	"/dev/" ZVOL_DEV_DIR

#define	ZVOL_PROP_NAME		"name"

/*

 * /dev/zfs ioctl numbers.

 */

#define	ZFS_IOC		('Z' << 8)

typedef enum zfs_ioc {

	ZFS_IOC_POOL_CREATE = ZFS_IOC,

	ZFS_IOC_POOL_DESTROY,

	ZFS_IOC_POOL_IMPORT,

	ZFS_IOC_POOL_EXPORT,

	ZFS_IOC_POOL_CONFIGS,

	ZFS_IOC_POOL_STATS,

	ZFS_IOC_POOL_TRYIMPORT,

	ZFS_IOC_POOL_SCRUB,

	ZFS_IOC_POOL_FREEZE,

	ZFS_IOC_POOL_UPGRADE,

	ZFS_IOC_POOL_GET_HISTORY,

	ZFS_IOC_VDEV_ADD,

	ZFS_IOC_VDEV_REMOVE,

	ZFS_IOC_VDEV_SET_STATE,

	ZFS_IOC_VDEV_ATTACH,

	ZFS_IOC_VDEV_DETACH,

	ZFS_IOC_VDEV_SETPATH,

	ZFS_IOC_OBJSET_STATS,

	ZFS_IOC_OBJSET_VERSION,

	ZFS_IOC_DATASET_LIST_NEXT,

	ZFS_IOC_SNAPSHOT_LIST_NEXT,

	ZFS_IOC_SET_PROP,

	ZFS_IOC_CREATE_MINOR,