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 * Copyright (c) 2011 by Delphix. All rights reserved. 25 */ 26 27 #ifndef _SYS_METASLAB_IMPL_H 28 #define _SYS_METASLAB_IMPL_H 29 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 { 41 spa_t *mc_spa; 42 metaslab_group_t *mc_rotor; 43 space_map_ops_t *mc_ops; 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 */ 49 }; 50 51 struct metaslab_group { 52 kmutex_t mg_lock; 53 avl_tree_t mg_metaslab_tree; 54 uint64_t mg_aliquot; 55 uint64_t mg_bonus_area; 56 uint64_t mg_alloc_failures; 57 int64_t mg_bias; 58 int64_t mg_activation_count; 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 */ 78 space_map_t ms_defermap[TXG_DEFER_SIZE]; /* deferred frees */ 79 space_map_t ms_map; /* in-core free space map */ 80 int64_t ms_deferspace; /* sum of ms_defermap[] space */ 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 */ 92