90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_METASLAB_IMPL_H
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#define _SYS_METASLAB_IMPL_H
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#include <sys/metaslab.h>
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#include <sys/space_map.h>
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#include <sys/vdev.h>
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#include <sys/txg.h>
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#include <sys/avl.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct metaslab_class {
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spa_t *mc_spa;
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metaslab_group_t *mc_rotor;
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space_map_ops_t *mc_ops;
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uint64_t mc_aliquot;
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uint64_t mc_alloc; /* total allocated space */
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uint64_t mc_deferred; /* total deferred frees */
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uint64_t mc_space; /* total space (alloc + free) */
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uint64_t mc_dspace; /* total deflated space */
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};
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struct metaslab_group {
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kmutex_t mg_lock;
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avl_tree_t mg_metaslab_tree;
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uint64_t mg_aliquot;
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uint64_t mg_bonus_area;
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int64_t mg_bias;
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int64_t mg_activation_count;
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metaslab_class_t *mg_class;
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vdev_t *mg_vd;
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metaslab_group_t *mg_prev;
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metaslab_group_t *mg_next;
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};
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/*
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* Each metaslab's free space is tracked in space map object in the MOS,
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* which is only updated in syncing context. Each time we sync a txg,
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* we append the allocs and frees from that txg to the space map object.
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* When the txg is done syncing, metaslab_sync_done() updates ms_smo
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* to ms_smo_syncing. Everything in ms_smo is always safe to allocate.
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*/
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struct metaslab {
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kmutex_t ms_lock; /* metaslab lock */
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space_map_obj_t ms_smo; /* synced space map object */
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space_map_obj_t ms_smo_syncing; /* syncing space map object */
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space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */
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space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */
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space_map_t ms_defermap[TXG_DEFER_SIZE]; /* deferred frees */
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space_map_t ms_map; /* in-core free space map */
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int64_t ms_deferspace; /* sum of ms_defermap[] space */
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uint64_t ms_weight; /* weight vs. others in group */
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metaslab_group_t *ms_group; /* metaslab group */
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avl_node_t ms_group_node; /* node in metaslab group tree */
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txg_node_t ms_txg_node; /* per-txg dirty metaslab links */
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_METASLAB_IMPL_H */
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