/*

 * 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2012 by Delphix. All rights reserved.

 */

#ifndef _SYS_VDEV_H

#define	_SYS_VDEV_H

#include <sys/spa.h>

#include <sys/zio.h>

#include <sys/dmu.h>

#include <sys/space_map.h>

#include <sys/fs/zfs.h>

#ifdef	__cplusplus

extern "C" {

#endif

typedef enum vdev_dtl_type {

	DTL_MISSING,	/* 0% replication: no copies of the data */

	DTL_PARTIAL,	/* less than 100% replication: some copies missing */

	DTL_SCRUB,	/* unable to fully repair during scrub/resilver */

	DTL_OUTAGE,	/* temporarily missing (used to attempt detach) */

	DTL_TYPES

} vdev_dtl_type_t;

extern boolean_t zfs_nocacheflush;

extern int vdev_open(vdev_t *);

extern void vdev_open_children(vdev_t *);

extern boolean_t vdev_uses_zvols(vdev_t *);

extern int vdev_validate(vdev_t *, boolean_t);

extern void vdev_close(vdev_t *);

extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);

extern void vdev_reopen(vdev_t *);

extern int vdev_validate_aux(vdev_t *vd);

extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);

extern boolean_t vdev_is_bootable(vdev_t *vd);

extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);

extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);

extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,

    uint64_t txg, uint64_t size);

extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,

    uint64_t txg, uint64_t size);

extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);

extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,

    int scrub_done);

extern boolean_t vdev_dtl_required(vdev_t *vd);

extern boolean_t vdev_resilver_needed(vdev_t *vd,

    uint64_t *minp, uint64_t *maxp);

extern void vdev_hold(vdev_t *);

extern void vdev_rele(vdev_t *);

extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);

extern void vdev_metaslab_fini(vdev_t *vd);

extern void vdev_metaslab_set_size(vdev_t *);

extern void vdev_expand(vdev_t *vd, uint64_t txg);

extern void vdev_split(vdev_t *vd);

extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);

extern void vdev_clear_stats(vdev_t *vd);

extern void vdev_stat_update(zio_t *zio, uint64_t psize);

extern void vdev_scan_stat_init(vdev_t *vd);

extern void vdev_propagate_state(vdev_t *vd);

extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,

    vdev_aux_t aux);

extern void vdev_space_update(vdev_t *vd,

    int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);

extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);

extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);

extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);

extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,

    vdev_state_t *);

extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);

extern void vdev_clear(spa_t *spa, vdev_t *vd);

extern boolean_t vdev_is_dead(vdev_t *vd);

extern boolean_t vdev_readable(vdev_t *vd);

extern boolean_t vdev_writeable(vdev_t *vd);

extern boolean_t vdev_allocatable(vdev_t *vd);

extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);

extern void vdev_cache_init(vdev_t *vd);

extern void vdev_cache_fini(vdev_t *vd);

extern int vdev_cache_read(zio_t *zio);

extern void vdev_cache_write(zio_t *zio);

extern void vdev_cache_purge(vdev_t *vd);

extern void vdev_queue_init(vdev_t *vd);

extern void vdev_queue_fini(vdev_t *vd);

extern zio_t *vdev_queue_io(zio_t *zio);

extern void vdev_queue_io_done(zio_t *zio);

extern void vdev_config_dirty(vdev_t *vd);

extern void vdev_config_clean(vdev_t *vd);

extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,

    boolean_t);

extern void vdev_state_dirty(vdev_t *vd);

extern void vdev_state_clean(vdev_t *vd);

typedef enum vdev_config_flag {

	VDEV_CONFIG_SPARE = 1 << 0,

	VDEV_CONFIG_L2CACHE = 1 << 1,

	VDEV_CONFIG_REMOVING = 1 << 2

} vdev_config_flag_t;

extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);

extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,

    boolean_t getstats, vdev_config_flag_t flags);

/*

 * Label routines

 */

struct uberblock;

extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);

extern int vdev_label_number(uint64_t psise, uint64_t offset);

typedef enum {

	VDEV_LABEL_CREATE,	/* create/add a new device */

	VDEV_LABEL_REPLACE,	/* replace an existing device */

	VDEV_LABEL_SPARE,	/* add a new hot spare */

	VDEV_LABEL_REMOVE,	/* remove an existing device */

	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */

	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */

} vdev_labeltype_t;

extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);

#ifdef	__cplusplus

}

#endif

#endif	/* _SYS_VDEV_H */