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) 2011, 2015 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 } metaslab_ops_t; 42 43 extern metaslab_ops_t *zfs_metaslab_ops; 44 45 int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t, 46 metaslab_t **); 47 void metaslab_fini(metaslab_t *); 48 49 void metaslab_load_wait(metaslab_t *); 50 int metaslab_load(metaslab_t *); 51 void metaslab_unload(metaslab_t *); 52 53 void metaslab_sync(metaslab_t *, uint64_t); 54 void metaslab_sync_done(metaslab_t *, uint64_t); 55 void metaslab_sync_reassess(metaslab_group_t *); 56 uint64_t metaslab_block_maxsize(metaslab_t *); 57 58 #define METASLAB_HINTBP_FAVOR 0x0 59 #define METASLAB_HINTBP_AVOID 0x1 60 #define METASLAB_GANG_HEADER 0x2 61 #define METASLAB_GANG_CHILD 0x4 62 #define METASLAB_ASYNC_ALLOC 0x8 63 #define METASLAB_DONT_THROTTLE 0x10 64 65 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t, 66 blkptr_t *, int, uint64_t, blkptr_t *, int, zio_t *); 67 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t); 68 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t); 69 void metaslab_check_free(spa_t *, const blkptr_t *); 70 71 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *); 72 void metaslab_class_destroy(metaslab_class_t *); 73 int metaslab_class_validate(metaslab_class_t *); 74 void metaslab_class_histogram_verify(metaslab_class_t *); 75 uint64_t metaslab_class_fragmentation(metaslab_class_t *); 76 uint64_t metaslab_class_expandable_space(metaslab_class_t *); 77 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, 78 zio_t *, int); 79 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *); 80 81 void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t, 82 int64_t, int64_t); 83 uint64_t metaslab_class_get_alloc(metaslab_class_t *); 84 uint64_t metaslab_class_get_space(metaslab_class_t *); 85 uint64_t metaslab_class_get_dspace(metaslab_class_t *); 86 uint64_t metaslab_class_get_deferred(metaslab_class_t *); 87 88 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *); 89 void metaslab_group_destroy(metaslab_group_t *); 90 void metaslab_group_activate(metaslab_group_t *); 91 void metaslab_group_passivate(metaslab_group_t *); 92 boolean_t metaslab_group_initialized(metaslab_group_t *); 93 uint64_t metaslab_group_get_space(metaslab_group_t *); 94 void metaslab_group_histogram_verify(metaslab_group_t *); 95 uint64_t metaslab_group_fragmentation(metaslab_group_t *); 96 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *); 97 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int); 98 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *); 99 100 #ifdef __cplusplus 101 } 102 #endif 103 104 #endif /* _SYS_METASLAB_H */ 105