/*

 * 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 2006 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#ifndef _SYS_SPA_IMPL_H

#define	_SYS_SPA_IMPL_H

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

#include <sys/spa.h>

#include <sys/vdev.h>

#include <sys/metaslab.h>

#include <sys/dmu.h>

#include <sys/dsl_pool.h>

#include <sys/uberblock_impl.h>

#include <sys/zfs_context.h>

#include <sys/avl.h>

#include <sys/refcount.h>

#include <sys/bplist.h>

#ifdef	__cplusplus

extern "C" {

#endif

typedef struct spa_config_lock {

	kmutex_t	scl_lock;

	refcount_t	scl_count;

	kthread_t	*scl_writer;

	kcondvar_t	scl_cv;

} spa_config_lock_t;

typedef struct spa_error_entry {

	zbookmark_t	se_bookmark;

	char		*se_name;

	avl_node_t	se_avl;

} spa_error_entry_t;

struct spa {

	/*

	 * Fields protected by spa_namespace_lock.

	 */

	char		*spa_name;		/* pool name */

	avl_node_t	spa_avl;		/* node in spa_namespace_avl */

	nvlist_t	*spa_config;		/* last synced config */

	nvlist_t	*spa_config_syncing;	/* currently syncing config */

	uint64_t	spa_config_txg;		/* txg of last config change */

	kmutex_t	spa_config_cache_lock;	/* for spa_config RW_READER */

	int		spa_sync_pass;		/* iterate-to-convergence */

	int		spa_state;		/* pool state */

	int		spa_inject_ref;		/* injection references */

	uint8_t		spa_traverse_wanted;	/* traverse lock wanted */

	uint8_t		spa_sync_on;		/* sync threads are running */

	spa_load_state_t spa_load_state;	/* current load operation */

	taskq_t		*spa_zio_issue_taskq[ZIO_TYPES];

	taskq_t		*spa_zio_intr_taskq[ZIO_TYPES];

	dsl_pool_t	*spa_dsl_pool;

	metaslab_class_t *spa_normal_class;	/* normal data class */

	uint64_t	spa_first_txg;		/* first txg after spa_open() */

	uint64_t	spa_final_txg;		/* txg of export/destroy */

	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */

	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */

	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */

	vdev_t		*spa_root_vdev;		/* top-level vdev container */

	uint64_t	spa_load_guid;		/* initial guid for spa_load */

	list_t		spa_dirty_list;		/* vdevs with dirty labels */

	uint64_t	spa_spares_object;	/* MOS object for spare list */

	nvlist_t	*spa_sparelist;		/* cached spare config */

	vdev_t		**spa_spares;		/* available hot spares */

	int		spa_nspares;		/* number of hot spares */

	boolean_t	spa_sync_spares;	/* sync the spares list */

	uint64_t	spa_config_object;	/* MOS object for pool config */

	uint64_t	spa_syncing_txg;	/* txg currently syncing */

	uint64_t	spa_sync_bplist_obj;	/* object for deferred frees */

	bplist_t	spa_sync_bplist;	/* deferred-free bplist */

	krwlock_t	spa_traverse_lock;	/* traverse vs. spa_sync() */

	uberblock_t	spa_ubsync;		/* last synced uberblock */

	uberblock_t	spa_uberblock;		/* current uberblock */

	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */

	kthread_t	*spa_scrub_thread;	/* scrub/resilver thread */

	traverse_handle_t *spa_scrub_th;	/* scrub traverse handle */

	uint64_t	spa_scrub_restart_txg;	/* need to restart */

	uint64_t	spa_scrub_mintxg;	/* min txg we'll scrub */

	uint64_t	spa_scrub_maxtxg;	/* max txg we'll scrub */

	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */

	int64_t		spa_scrub_throttled;	/* over-throttle scrub I/Os */

	uint64_t	spa_scrub_errors;	/* scrub I/O error count */

	int		spa_scrub_suspended;	/* tell scrubber to suspend */

	kcondvar_t	spa_scrub_cv;		/* scrub thread state change */

	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */

	uint8_t		spa_scrub_stop;		/* tell scrubber to stop */

	uint8_t		spa_scrub_active;	/* active or suspended? */

	uint8_t		spa_scrub_type;		/* type of scrub we're doing */

	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */

	kmutex_t	spa_async_lock;		/* protect async state */

	kthread_t	*spa_async_thread;	/* thread doing async task */

	int		spa_async_suspended;	/* async tasks suspended */

	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */

	uint16_t	spa_async_tasks;	/* async task mask */

	char		*spa_root;		/* alternate root directory */

	kmutex_t	spa_uberblock_lock;	/* vdev_uberblock_load_done() */

	uint64_t	spa_ena;		/* spa-wide ereport ENA */

	boolean_t	spa_last_open_failed;	/* true if last open faled */

	kmutex_t	spa_errlog_lock;	/* error log lock */

	uint64_t	spa_errlog_last;	/* last error log object */

	uint64_t	spa_errlog_scrub;	/* scrub error log object */

	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */

	avl_tree_t	spa_errlist_last;	/* last error list */

	avl_tree_t	spa_errlist_scrub;	/* scrub error list */

	uint64_t	spa_deflate;		/* should we deflate? */

	/*

	 * spa_refcnt must be the last element because it changes size based on

	 * compilation options.  In order for the MDB module to function

	 * correctly, the other fields must remain in the same location.

	 */

	spa_config_lock_t spa_config_lock;	/* configuration changes */

	refcount_t	spa_refcount;		/* number of opens */

};

extern const char *spa_config_dir;

extern kmutex_t spa_namespace_lock;

#ifdef	__cplusplus

}

#endif

#endif	/* _SYS_SPA_IMPL_H */