metaslab.h revision 262094
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 36extern "C" { 37#endif 38 39typedef 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 44extern metaslab_ops_t *zfs_metaslab_ops; 45 46metaslab_t *metaslab_init(metaslab_group_t *mg, uint64_t id, 47 uint64_t object, uint64_t txg); 48void metaslab_fini(metaslab_t *msp); 49 50void metaslab_load_wait(metaslab_t *msp); 51int metaslab_load(metaslab_t *msp); 52void metaslab_unload(metaslab_t *msp); 53 54void metaslab_sync(metaslab_t *msp, uint64_t txg); 55void metaslab_sync_done(metaslab_t *msp, uint64_t txg); 56void metaslab_sync_reassess(metaslab_group_t *mg); 57uint64_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 65int 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); 67void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, boolean_t now); 68int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg); 69void metaslab_check_free(spa_t *spa, const blkptr_t *bp); 70 71metaslab_class_t *metaslab_class_create(spa_t *spa, metaslab_ops_t *ops); 72void metaslab_class_destroy(metaslab_class_t *mc); 73int metaslab_class_validate(metaslab_class_t *mc); 74 75void 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); 78uint64_t metaslab_class_get_alloc(metaslab_class_t *mc); 79uint64_t metaslab_class_get_space(metaslab_class_t *mc); 80uint64_t metaslab_class_get_dspace(metaslab_class_t *mc); 81uint64_t metaslab_class_get_deferred(metaslab_class_t *mc); 82uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc); 83 84metaslab_group_t *metaslab_group_create(metaslab_class_t *mc, vdev_t *vd); 85void metaslab_group_destroy(metaslab_group_t *mg); 86void metaslab_group_activate(metaslab_group_t *mg); 87void metaslab_group_passivate(metaslab_group_t *mg); 88 89#ifdef __cplusplus 90} 91#endif 92 93#endif /* _SYS_METASLAB_H */ 94