dmu_objset.h revision 260769
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) 2012 by Delphix. All rights reserved. 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 25 */ 26 27/* Portions Copyright 2010 Robert Milkowski */ 28 29#ifndef _SYS_DMU_OBJSET_H 30#define _SYS_DMU_OBJSET_H 31 32#include <sys/spa.h> 33#include <sys/arc.h> 34#include <sys/txg.h> 35#include <sys/zfs_context.h> 36#include <sys/dnode.h> 37#include <sys/zio.h> 38#include <sys/zil.h> 39#include <sys/sa.h> 40 41#ifdef __cplusplus 42extern "C" { 43#endif 44 45extern krwlock_t os_lock; 46 47struct dsl_pool; 48struct dsl_dataset; 49struct dmu_tx; 50 51#define OBJSET_PHYS_SIZE 2048 52#define OBJSET_OLD_PHYS_SIZE 1024 53 54#define OBJSET_BUF_HAS_USERUSED(buf) \ 55 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 56 57#define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 58 59typedef struct objset_phys { 60 dnode_phys_t os_meta_dnode; 61 zil_header_t os_zil_header; 62 uint64_t os_type; 63 uint64_t os_flags; 64 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 65 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 66 dnode_phys_t os_userused_dnode; 67 dnode_phys_t os_groupused_dnode; 68} objset_phys_t; 69 70struct objset { 71 /* Immutable: */ 72 struct dsl_dataset *os_dsl_dataset; 73 spa_t *os_spa; 74 arc_buf_t *os_phys_buf; 75 objset_phys_t *os_phys; 76 /* 77 * The following "special" dnodes have no parent and are exempt from 78 * dnode_move(), but they root their descendents in this objset using 79 * handles anyway, so that all access to dnodes from dbufs consistently 80 * uses handles. 81 */ 82 dnode_handle_t os_meta_dnode; 83 dnode_handle_t os_userused_dnode; 84 dnode_handle_t os_groupused_dnode; 85 zilog_t *os_zil; 86 87 /* can change, under dsl_dir's locks: */ 88 uint8_t os_checksum; 89 uint8_t os_compress; 90 uint8_t os_copies; 91 uint8_t os_dedup_checksum; 92 uint8_t os_dedup_verify; 93 uint8_t os_logbias; 94 uint8_t os_primary_cache; 95 uint8_t os_secondary_cache; 96 uint8_t os_sync; 97 98 /* no lock needed: */ 99 struct dmu_tx *os_synctx; /* XXX sketchy */ 100 blkptr_t *os_rootbp; 101 zil_header_t os_zil_header; 102 list_t os_synced_dnodes; 103 uint64_t os_flags; 104 105 /* Protected by os_obj_lock */ 106 kmutex_t os_obj_lock; 107 uint64_t os_obj_next; 108 109 /* Protected by os_lock */ 110 kmutex_t os_lock; 111 list_t os_dirty_dnodes[TXG_SIZE]; 112 list_t os_free_dnodes[TXG_SIZE]; 113 list_t os_dnodes; 114 list_t os_downgraded_dbufs; 115 116 /* stuff we store for the user */ 117 kmutex_t os_user_ptr_lock; 118 void *os_user_ptr; 119 sa_os_t *os_sa; 120}; 121 122#define DMU_META_OBJSET 0 123#define DMU_META_DNODE_OBJECT 0 124#define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 125#define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 126#define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 127#define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 128 129#define DMU_OS_IS_L2CACHEABLE(os) \ 130 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 131 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 132 133#define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE) 134 135/* called from zpl */ 136int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 137int dmu_objset_own(const char *name, dmu_objset_type_t type, 138 boolean_t readonly, void *tag, objset_t **osp); 139void dmu_objset_refresh_ownership(objset_t *os, void *tag); 140void dmu_objset_rele(objset_t *os, void *tag); 141void dmu_objset_disown(objset_t *os, void *tag); 142int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 143 144void dmu_objset_stats(objset_t *os, nvlist_t *nv); 145void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 146void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 147 uint64_t *usedobjsp, uint64_t *availobjsp); 148uint64_t dmu_objset_fsid_guid(objset_t *os); 149int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 150 int func(struct dsl_pool *, struct dsl_dataset *, void *), 151 void *arg, int flags); 152int dmu_objset_prefetch(const char *name, void *arg); 153void dmu_objset_evict_dbufs(objset_t *os); 154timestruc_t dmu_objset_snap_cmtime(objset_t *os); 155 156/* called from dsl */ 157void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 158boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 159objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 160 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 161int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 162 objset_t **osp); 163void dmu_objset_evict(objset_t *os); 164void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 165void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 166boolean_t dmu_objset_userused_enabled(objset_t *os); 167int dmu_objset_userspace_upgrade(objset_t *os); 168boolean_t dmu_objset_userspace_present(objset_t *os); 169int dmu_fsname(const char *snapname, char *buf); 170 171void dmu_objset_init(void); 172void dmu_objset_fini(void); 173 174#ifdef __cplusplus 175} 176#endif 177 178#endif /* _SYS_DMU_OBJSET_H */ 179