[mirror_zfs.git] / include / sys / metaslab_impl.h

/*
 * 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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright (c) 2011 by Delphix. All rights reserved.
 */

#ifndef _SYS_METASLAB_IMPL_H
#define	_SYS_METASLAB_IMPL_H

#include <sys/metaslab.h>
#include <sys/space_map.h>
#include <sys/vdev.h>
#include <sys/txg.h>
#include <sys/avl.h>

#ifdef	__cplusplus
extern "C" {
#endif

struct metaslab_class {
	spa_t			*mc_spa;
	metaslab_group_t	*mc_rotor;
	space_map_ops_t		*mc_ops;
	uint64_t		mc_aliquot;
	uint64_t		mc_alloc;	/* total allocated space */
	uint64_t		mc_deferred;	/* total deferred frees */
	uint64_t		mc_space;	/* total space (alloc + free) */
	uint64_t		mc_dspace;	/* total deflated space */
};

struct metaslab_group {
	kmutex_t		mg_lock;
	avl_tree_t		mg_metaslab_tree;
	uint64_t		mg_aliquot;
	uint64_t		mg_bonus_area;
	uint64_t		mg_alloc_failures;
	int64_t			mg_bias;
	int64_t			mg_activation_count;
	metaslab_class_t	*mg_class;
	vdev_t			*mg_vd;
	metaslab_group_t	*mg_prev;
	metaslab_group_t	*mg_next;
};

/*
 * Each metaslab's free space is tracked in space map object in the MOS,
 * which is only updated in syncing context.  Each time we sync a txg,
 * we append the allocs and frees from that txg to the space map object.
 * When the txg is done syncing, metaslab_sync_done() updates ms_smo
 * to ms_smo_syncing.  Everything in ms_smo is always safe to allocate.
 */
struct metaslab {
	kmutex_t	ms_lock;	/* metaslab lock		*/
	space_map_obj_t	ms_smo;		/* synced space map object	*/
	space_map_obj_t	ms_smo_syncing;	/* syncing space map object	*/
	space_map_t	ms_allocmap[TXG_SIZE];  /* allocated this txg	*/
	space_map_t	ms_freemap[TXG_SIZE];	/* freed this txg	*/
	space_map_t	ms_defermap[TXG_DEFER_SIZE]; /* deferred frees	*/
	space_map_t	ms_map;		/* in-core free space map	*/
	int64_t		ms_deferspace;	/* sum of ms_defermap[] space	*/
	uint64_t	ms_weight;	/* weight vs. others in group	*/
	metaslab_group_t *ms_group;	/* metaslab group		*/
	avl_node_t	ms_group_node;	/* node in metaslab group tree	*/
	txg_node_t	ms_txg_node;	/* per-txg dirty metaslab links	*/
};

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_METASLAB_IMPL_H */
Commit	Line	Data
34dc7c2f BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21	/*
9babb374	22	* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
34dc7c2f	23	* Use is subject to license terms.
6d974228	24	* Copyright (c) 2011 by Delphix. All rights reserved.
34dc7c2f BB	25	*/
	26
	27	#ifndef _SYS_METASLAB_IMPL_H
	28	#define _SYS_METASLAB_IMPL_H
	29
34dc7c2f BB	30	#include <sys/metaslab.h>
	31	#include <sys/space_map.h>
	32	#include <sys/vdev.h>
	33	#include <sys/txg.h>
	34	#include <sys/avl.h>
	35
	36	#ifdef __cplusplus
	37	extern "C" {
	38	#endif
	39
	40	struct metaslab_class {
428870ff	41	spa_t *mc_spa;
34dc7c2f	42	metaslab_group_t *mc_rotor;
9babb374	43	space_map_ops_t *mc_ops;
428870ff BB	44	uint64_t mc_aliquot;
	45	uint64_t mc_alloc; /* total allocated space */
	46	uint64_t mc_deferred; /* total deferred frees */
	47	uint64_t mc_space; /* total space (alloc + free) */
	48	uint64_t mc_dspace; /* total deflated space */
34dc7c2f BB	49	};
	50
	51	struct metaslab_group {
	52	kmutex_t mg_lock;
	53	avl_tree_t mg_metaslab_tree;
	54	uint64_t mg_aliquot;
428870ff	55	uint64_t mg_bonus_area;
6d974228	56	uint64_t mg_alloc_failures;
34dc7c2f	57	int64_t mg_bias;
428870ff	58	int64_t mg_activation_count;
34dc7c2f BB	59	metaslab_class_t *mg_class;
	60	vdev_t *mg_vd;
	61	metaslab_group_t *mg_prev;
	62	metaslab_group_t *mg_next;
	63	};
	64
	65	/*
	66	* Each metaslab's free space is tracked in space map object in the MOS,
	67	* which is only updated in syncing context. Each time we sync a txg,
	68	* we append the allocs and frees from that txg to the space map object.
	69	* When the txg is done syncing, metaslab_sync_done() updates ms_smo
	70	* to ms_smo_syncing. Everything in ms_smo is always safe to allocate.
	71	*/
	72	struct metaslab {
	73	kmutex_t ms_lock; /* metaslab lock */
	74	space_map_obj_t ms_smo; /* synced space map object */
	75	space_map_obj_t ms_smo_syncing; /* syncing space map object */
	76	space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */
	77	space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */
428870ff	78	space_map_t ms_defermap[TXG_DEFER_SIZE]; /* deferred frees */
34dc7c2f	79	space_map_t ms_map; /* in-core free space map */
428870ff	80	int64_t ms_deferspace; /* sum of ms_defermap[] space */
34dc7c2f BB	81	uint64_t ms_weight; /* weight vs. others in group */
	82	metaslab_group_t ms_group; / metaslab group */
	83	avl_node_t ms_group_node; /* node in metaslab group tree */
	84	txg_node_t ms_txg_node; /* per-txg dirty metaslab links */
	85	};
	86
	87	#ifdef __cplusplus
	88	}
	89	#endif
	90
	91	#endif /* _SYS_METASLAB_IMPL_H */