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 /* 27 * Copyright (c) 2012 by Delphix. All rights reserved. 28 */ 29 30 #ifndef _SYS_METASLAB_IMPL_H 31 #define _SYS_METASLAB_IMPL_H 32 33 #include <sys/metaslab.h> 34 #include <sys/space_map.h> 35 #include <sys/vdev.h> 36 #include <sys/txg.h> 37 #include <sys/avl.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 struct metaslab_class { 44 spa_t *mc_spa; 45 metaslab_group_t *mc_rotor; 46 space_map_ops_t *mc_ops; 47 uint64_t mc_aliquot; 48 uint64_t mc_alloc; /* total allocated space */ 49 uint64_t mc_deferred; /* total deferred frees */ 50 uint64_t mc_space; /* total space (alloc + free) */ 51 uint64_t mc_dspace; /* total deflated space */ 52 }; 53 54 struct metaslab_group { 55 kmutex_t mg_lock; 56 avl_tree_t mg_metaslab_tree; 57 uint64_t mg_aliquot; 58 uint64_t mg_bonus_area; 59 uint64_t mg_alloc_failures; 60 int64_t mg_bias; 61 int64_t mg_activation_count; 62 metaslab_class_t *mg_class; 63 vdev_t *mg_vd; 64 metaslab_group_t *mg_prev; 65 metaslab_group_t *mg_next; 66 }; 67 68 /* 69 * Each metaslab's free space is tracked in space map object in the MOS, 70 * which is only updated in syncing context. Each time we sync a txg, 71 * we append the allocs and frees from that txg to the space map object. 72 * When the txg is done syncing, metaslab_sync_done() updates ms_smo 73 * to ms_smo_syncing. Everything in ms_smo is always safe to allocate. 74 */ 75 struct metaslab { 76 kmutex_t ms_lock; /* metaslab lock */ 77 space_map_obj_t ms_smo; /* synced space map object */ 78 space_map_obj_t ms_smo_syncing; /* syncing space map object */ 79 space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */ 80 space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */ 81 space_map_t ms_defermap[TXG_DEFER_SIZE]; /* deferred frees */ 82 space_map_t ms_map; /* in-core free space map */ 83 int64_t ms_deferspace; /* sum of ms_defermap[] space */ 84 uint64_t ms_weight; /* weight vs. others in group */ 85 metaslab_group_t *ms_group; /* metaslab group */ 86 avl_node_t ms_group_node; /* node in metaslab group tree */ 87 txg_node_t ms_txg_node; /* per-txg dirty metaslab links */ 88 }; 89 90 #ifdef __cplusplus 91 } 92 #endif 93 94 #endif /* _SYS_METASLAB_IMPL_H */ 95