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, 2018 by Delphix. All rights reserved. 24 * Copyright (c) 2017, Intel Corporation. 25 */ 26 27 #ifndef _SYS_METASLAB_H 28 #define _SYS_METASLAB_H 29 30 #include <sys/spa.h> 31 #include <sys/space_map.h> 32 #include <sys/txg.h> 33 #include <sys/zio.h> 34 #include <sys/avl.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 41 typedef struct metaslab_ops { 42 uint64_t (*msop_alloc)(metaslab_t *, uint64_t); 43 } metaslab_ops_t; 44 45 46 extern metaslab_ops_t *zfs_metaslab_ops; 47 48 int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t, 49 metaslab_t **); 50 void metaslab_fini(metaslab_t *); 51 52 int metaslab_load(metaslab_t *); 53 void metaslab_unload(metaslab_t *); 54 55 uint64_t metaslab_allocated_space(metaslab_t *); 56 57 void metaslab_sync(metaslab_t *, uint64_t); 58 void metaslab_sync_done(metaslab_t *, uint64_t); 59 void metaslab_sync_reassess(metaslab_group_t *); 60 uint64_t metaslab_block_maxsize(metaslab_t *); 61 62 /* 63 * metaslab alloc flags 64 */ 65 #define METASLAB_HINTBP_FAVOR 0x0 66 #define METASLAB_HINTBP_AVOID 0x1 67 #define METASLAB_GANG_HEADER 0x2 68 #define METASLAB_GANG_CHILD 0x4 69 #define METASLAB_ASYNC_ALLOC 0x8 70 #define METASLAB_DONT_THROTTLE 0x10 71 #define METASLAB_MUST_RESERVE 0x20 72 #define METASLAB_FASTWRITE 0x40 73 74 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t, 75 blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *, 76 int); 77 int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t, 78 dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int); 79 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t); 80 void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t); 81 void metaslab_free_dva(spa_t *, const dva_t *, boolean_t); 82 void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *); 83 void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t); 84 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t); 85 int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t); 86 void metaslab_check_free(spa_t *, const blkptr_t *); 87 88 void metaslab_alloc_trace_init(void); 89 void metaslab_alloc_trace_fini(void); 90 void metaslab_trace_init(zio_alloc_list_t *); 91 void metaslab_trace_fini(zio_alloc_list_t *); 92 93 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *); 94 void metaslab_class_destroy(metaslab_class_t *); 95 int metaslab_class_validate(metaslab_class_t *); 96 void metaslab_class_histogram_verify(metaslab_class_t *); 97 uint64_t metaslab_class_fragmentation(metaslab_class_t *); 98 uint64_t metaslab_class_expandable_space(metaslab_class_t *); 99 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, int, 100 zio_t *, int); 101 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, int, zio_t *); 102 103 uint64_t metaslab_class_get_alloc(metaslab_class_t *); 104 uint64_t metaslab_class_get_space(metaslab_class_t *); 105 uint64_t metaslab_class_get_dspace(metaslab_class_t *); 106 uint64_t metaslab_class_get_deferred(metaslab_class_t *); 107 108 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *, int); 109 void metaslab_group_destroy(metaslab_group_t *); 110 void metaslab_group_activate(metaslab_group_t *); 111 void metaslab_group_passivate(metaslab_group_t *); 112 boolean_t metaslab_group_initialized(metaslab_group_t *); 113 uint64_t metaslab_group_get_space(metaslab_group_t *); 114 void metaslab_group_histogram_verify(metaslab_group_t *); 115 uint64_t metaslab_group_fragmentation(metaslab_group_t *); 116 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *); 117 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int, int, 118 boolean_t); 119 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *, int); 120 void metaslab_recalculate_weight_and_sort(metaslab_t *); 121 122 #ifdef __cplusplus 123 } 124 #endif 125 126 #endif /* _SYS_METASLAB_H */ 127