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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2012 by Delphix. All rights reserved. 24 */ 25 26 #ifndef _SYS_METASLAB_H 27 #define _SYS_METASLAB_H 28 29 #include <sys/spa.h> 30 #include <sys/space_map.h> 31 #include <sys/txg.h> 32 #include <sys/zio.h> 33 #include <sys/avl.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 extern space_map_ops_t *zfs_metaslab_ops; 40 41 extern metaslab_t *metaslab_init(metaslab_group_t *mg, space_map_obj_t *smo, 42 uint64_t start, uint64_t size, uint64_t txg); 43 extern void metaslab_fini(metaslab_t *msp); 44 extern void metaslab_sync(metaslab_t *msp, uint64_t txg); 45 extern void metaslab_sync_done(metaslab_t *msp, uint64_t txg); 46 extern void metaslab_sync_reassess(metaslab_group_t *mg); 47 48 #define METASLAB_HINTBP_FAVOR 0x0 49 #define METASLAB_HINTBP_AVOID 0x1 50 #define METASLAB_GANG_HEADER 0x2 51 #define METASLAB_GANG_CHILD 0x4 52 #define METASLAB_GANG_AVOID 0x8 53 54 extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize, 55 blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags); 56 extern void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, 57 boolean_t now); 58 extern int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg); 59 extern void metaslab_check_free(spa_t *spa, const blkptr_t *bp); 60 61 extern metaslab_class_t *metaslab_class_create(spa_t *spa, 62 space_map_ops_t *ops); 63 extern void metaslab_class_destroy(metaslab_class_t *mc); 64 extern int metaslab_class_validate(metaslab_class_t *mc); 65 66 extern void metaslab_class_space_update(metaslab_class_t *mc, 67 int64_t alloc_delta, int64_t defer_delta, 68 int64_t space_delta, int64_t dspace_delta); 69 extern uint64_t metaslab_class_get_alloc(metaslab_class_t *mc); 70 extern uint64_t metaslab_class_get_space(metaslab_class_t *mc); 71 extern uint64_t metaslab_class_get_dspace(metaslab_class_t *mc); 72 extern uint64_t metaslab_class_get_deferred(metaslab_class_t *mc); 73 74 extern metaslab_group_t *metaslab_group_create(metaslab_class_t *mc, 75 vdev_t *vd); 76 extern void metaslab_group_destroy(metaslab_group_t *mg); 77 extern void metaslab_group_activate(metaslab_group_t *mg); 78 extern void metaslab_group_passivate(metaslab_group_t *mg); 79 80 #ifdef __cplusplus 81 } 82 #endif 83 84 #endif /* _SYS_METASLAB_H */ 85