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 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_METASLAB_IMPL_H 27 #define _SYS_METASLAB_IMPL_H 28 29 #include <sys/metaslab.h> 30 #include <sys/space_map.h> 31 #include <sys/vdev.h> 32 #include <sys/txg.h> 33 #include <sys/avl.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 struct metaslab_class { 40 spa_t *mc_spa; 41 metaslab_group_t *mc_rotor; 42 space_map_ops_t *mc_ops; 43 uint64_t mc_aliquot; 44 uint64_t mc_alloc; /* total allocated space */ 45 uint64_t mc_deferred; /* total deferred frees */ 46 uint64_t mc_space; /* total space (alloc + free) */ 47 uint64_t mc_dspace; /* total deflated space */ 48 }; 49 50 struct metaslab_group { 51 kmutex_t mg_lock; 52 avl_tree_t mg_metaslab_tree; 53 uint64_t mg_aliquot; 54 uint64_t mg_bonus_area; 55 int64_t mg_bias; 56 int64_t mg_activation_count; 57 metaslab_class_t *mg_class; 58 vdev_t *mg_vd; 59 metaslab_group_t *mg_prev; 60 metaslab_group_t *mg_next; 61 }; 62 63 /* 64 * Each metaslab's free space is tracked in space map object in the MOS, 65 * which is only updated in syncing context. Each time we sync a txg, 66 * we append the allocs and frees from that txg to the space map object. 67 * When the txg is done syncing, metaslab_sync_done() updates ms_smo 68 * to ms_smo_syncing. Everything in ms_smo is always safe to allocate. 69 */ 70 struct metaslab { 71 kmutex_t ms_lock; /* metaslab lock */ 72 space_map_obj_t ms_smo; /* synced space map object */ 73 space_map_obj_t ms_smo_syncing; /* syncing space map object */ 74 space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */ 75 space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */ 76 space_map_t ms_defermap[TXG_DEFER_SIZE]; /* deferred frees */ 77 space_map_t ms_map; /* in-core free space map */ 78 int64_t ms_deferspace; /* sum of ms_defermap[] space */ 79 uint64_t ms_weight; /* weight vs. others in group */ 80 metaslab_group_t *ms_group; /* metaslab group */ 81 avl_node_t ms_group_node; /* node in metaslab group tree */ 82 txg_node_t ms_txg_node; /* per-txg dirty metaslab links */ 83 }; 84 85 #ifdef __cplusplus 86 } 87 #endif 88 89 #endif /* _SYS_METASLAB_IMPL_H */ 90