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) 2013 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 typedef struct metaslab_ops { 40 uint64_t (*msop_alloc)(metaslab_t *msp, uint64_t size); 41 boolean_t (*msop_fragmented)(metaslab_t *msp); 42 } metaslab_ops_t; 43 44 extern metaslab_ops_t *zfs_metaslab_ops; 45 46 metaslab_t *metaslab_init(metaslab_group_t *mg, uint64_t id, 47 uint64_t object, uint64_t txg); 48 void metaslab_fini(metaslab_t *msp); 49 50 void metaslab_load_wait(metaslab_t *msp); 51 int metaslab_load(metaslab_t *msp); 52 void metaslab_unload(metaslab_t *msp); 53 54 void metaslab_sync(metaslab_t *msp, uint64_t txg); 55 void metaslab_sync_done(metaslab_t *msp, uint64_t txg); 56 void metaslab_sync_reassess(metaslab_group_t *mg); 57 uint64_t metaslab_block_maxsize(metaslab_t *msp); 58 59 #define METASLAB_HINTBP_FAVOR 0x0 60 #define METASLAB_HINTBP_AVOID 0x1 61 #define METASLAB_GANG_HEADER 0x2 62 #define METASLAB_GANG_CHILD 0x4 63 #define METASLAB_GANG_AVOID 0x8 64 65 int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize, 66 blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags); 67 void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, boolean_t now); 68 int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg); 69 void metaslab_check_free(spa_t *spa, const blkptr_t *bp); 70 71 metaslab_class_t *metaslab_class_create(spa_t *spa, metaslab_ops_t *ops); 72 void metaslab_class_destroy(metaslab_class_t *mc); 73 int metaslab_class_validate(metaslab_class_t *mc); 74 75 void metaslab_class_space_update(metaslab_class_t *mc, 76 int64_t alloc_delta, int64_t defer_delta, 77 int64_t space_delta, int64_t dspace_delta); 78 uint64_t metaslab_class_get_alloc(metaslab_class_t *mc); 79 uint64_t metaslab_class_get_space(metaslab_class_t *mc); 80 uint64_t metaslab_class_get_dspace(metaslab_class_t *mc); 81 uint64_t metaslab_class_get_deferred(metaslab_class_t *mc); 82 83 metaslab_group_t *metaslab_group_create(metaslab_class_t *mc, vdev_t *vd); 84 void metaslab_group_destroy(metaslab_group_t *mg); 85 void metaslab_group_activate(metaslab_group_t *mg); 86 void metaslab_group_passivate(metaslab_group_t *mg); 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif /* _SYS_METASLAB_H */ 93