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 36extern "C" { 37#endif 38 39typedef struct metaslab_ops { 40 uint64_t (*msop_alloc)(metaslab_t *msp, uint64_t size); 41} metaslab_ops_t; 42 43extern metaslab_ops_t *zfs_metaslab_ops; 44 45int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t, 46 metaslab_t **); 47void metaslab_fini(metaslab_t *); 48 49void metaslab_load_wait(metaslab_t *); 50int metaslab_load(metaslab_t *); 51void metaslab_unload(metaslab_t *); 52 53void metaslab_sync(metaslab_t *, uint64_t); 54void metaslab_sync_done(metaslab_t *, uint64_t); 55void metaslab_sync_reassess(metaslab_group_t *); 56uint64_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 65int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t, 66 blkptr_t *, int, uint64_t, blkptr_t *, int, zio_t *); 67void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t); 68int metaslab_claim(spa_t *, const blkptr_t *, uint64_t); 69void metaslab_check_free(spa_t *, const blkptr_t *); 70 71metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *); 72void metaslab_class_destroy(metaslab_class_t *); 73int metaslab_class_validate(metaslab_class_t *); 74void metaslab_class_histogram_verify(metaslab_class_t *); 75uint64_t metaslab_class_fragmentation(metaslab_class_t *); 76uint64_t metaslab_class_expandable_space(metaslab_class_t *); 77boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, 78 zio_t *, int); 79void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *); 80 81void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t, 82 int64_t, int64_t); 83uint64_t metaslab_class_get_alloc(metaslab_class_t *); 84uint64_t metaslab_class_get_space(metaslab_class_t *); 85uint64_t metaslab_class_get_dspace(metaslab_class_t *); 86uint64_t metaslab_class_get_deferred(metaslab_class_t *); 87uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc); 88 89metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *); 90void metaslab_group_destroy(metaslab_group_t *); 91void metaslab_group_activate(metaslab_group_t *); 92void metaslab_group_passivate(metaslab_group_t *); 93boolean_t metaslab_group_initialized(metaslab_group_t *); 94uint64_t metaslab_group_get_space(metaslab_group_t *); 95void metaslab_group_histogram_verify(metaslab_group_t *); 96uint64_t metaslab_group_fragmentation(metaslab_group_t *); 97void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *); 98void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int); 99void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *); 100 101#ifdef __cplusplus 102} 103#endif 104 105#endif /* _SYS_METASLAB_H */ 106