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 2006 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 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/metaslab.h> 32 #include <sys/space_map.h> 33 #include <sys/vdev.h> 34 #include <sys/txg.h> 35 #include <sys/avl.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 struct metaslab_class { 42 metaslab_group_t *mc_rotor; 43 uint64_t mc_allocated; 44 }; 45 46 struct metaslab_group { 47 kmutex_t mg_lock; 48 avl_tree_t mg_metaslab_tree; 49 uint64_t mg_aliquot; 50 int64_t mg_bias; 51 metaslab_class_t *mg_class; 52 vdev_t *mg_vd; 53 metaslab_group_t *mg_prev; 54 metaslab_group_t *mg_next; 55 }; 56 57 /* 58 * Each metaslab's free space is tracked in space map object in the MOS, 59 * which is only updated in syncing context. Each time we sync a txg, 60 * we append the allocs and frees from that txg to the space map object. 61 * When the txg is done syncing, metaslab_sync_done() updates ms_smo 62 * to ms_smo_syncing. Everything in ms_smo is always safe to allocate. 63 */ 64 struct metaslab { 65 kmutex_t ms_lock; /* metaslab lock */ 66 space_map_obj_t ms_smo; /* synced space map object */ 67 space_map_obj_t ms_smo_syncing; /* syncing space map object */ 68 space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */ 69 space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */ 70 space_map_t ms_map; /* in-core free space map */ 71 uint64_t ms_weight; /* weight vs. others in group */ 72 metaslab_group_t *ms_group; /* metaslab group */ 73 avl_node_t ms_group_node; /* node in metaslab group tree */ 74 txg_node_t ms_txg_node; /* per-txg dirty metaslab links */ 75 }; 76 77 #ifdef __cplusplus 78 } 79 #endif 80 81 #endif /* _SYS_METASLAB_IMPL_H */ 82