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, 2017 by Delphix. All rights reserved. 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26 * Copyright (c) 2014 Integros [integros.com] 27 */ 28 29 /* Portions Copyright 2010 Robert Milkowski */ 30 31 #ifndef _SYS_DMU_OBJSET_H 32 #define _SYS_DMU_OBJSET_H 33 34 #include <sys/spa.h> 35 #include <sys/arc.h> 36 #include <sys/txg.h> 37 #include <sys/zfs_context.h> 38 #include <sys/dnode.h> 39 #include <sys/zio.h> 40 #include <sys/zil.h> 41 #include <sys/sa.h> 42 #include <sys/zfs_ioctl.h> 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 extern krwlock_t os_lock; 49 50 struct dsl_pool; 51 struct dsl_dataset; 52 struct dmu_tx; 53 54 #define OBJSET_PHYS_SIZE 2048 55 #define OBJSET_OLD_PHYS_SIZE 1024 56 57 #define OBJSET_BUF_HAS_USERUSED(buf) \ 58 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 59 60 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 61 62 typedef struct objset_phys { 63 dnode_phys_t os_meta_dnode; 64 zil_header_t os_zil_header; 65 uint64_t os_type; 66 uint64_t os_flags; 67 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 68 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 69 dnode_phys_t os_userused_dnode; 70 dnode_phys_t os_groupused_dnode; 71 } objset_phys_t; 72 73 #define OBJSET_PROP_UNINITIALIZED ((uint64_t)-1) 74 struct objset { 75 /* Immutable: */ 76 struct dsl_dataset *os_dsl_dataset; 77 spa_t *os_spa; 78 arc_buf_t *os_phys_buf; 79 objset_phys_t *os_phys; 80 /* 81 * The following "special" dnodes have no parent, are exempt 82 * from dnode_move(), and are not recorded in os_dnodes, but they 83 * root their descendents in this objset using handles anyway, so 84 * that all access to dnodes from dbufs consistently uses handles. 85 */ 86 dnode_handle_t os_meta_dnode; 87 dnode_handle_t os_userused_dnode; 88 dnode_handle_t os_groupused_dnode; 89 zilog_t *os_zil; 90 91 list_node_t os_evicting_node; 92 93 /* can change, under dsl_dir's locks: */ 94 enum zio_checksum os_checksum; 95 enum zio_compress os_compress; 96 uint8_t os_copies; 97 enum zio_checksum os_dedup_checksum; 98 boolean_t os_dedup_verify; 99 zfs_logbias_op_t os_logbias; 100 zfs_cache_type_t os_primary_cache; 101 zfs_cache_type_t os_secondary_cache; 102 zfs_sync_type_t os_sync; 103 zfs_redundant_metadata_type_t os_redundant_metadata; 104 int os_recordsize; 105 /* 106 * The next four values are used as a cache of whatever's on disk, and 107 * are initialized the first time these properties are queried. Before 108 * being initialized with their real values, their values are 109 * OBJSET_PROP_UNINITIALIZED. 110 */ 111 uint64_t os_version; 112 uint64_t os_normalization; 113 uint64_t os_utf8only; 114 uint64_t os_casesensitivity; 115 116 /* 117 * Pointer is constant; the blkptr it points to is protected by 118 * os_dsl_dataset->ds_bp_rwlock 119 */ 120 blkptr_t *os_rootbp; 121 122 /* no lock needed: */ 123 struct dmu_tx *os_synctx; /* XXX sketchy */ 124 zil_header_t os_zil_header; 125 multilist_t *os_synced_dnodes; 126 uint64_t os_flags; 127 uint64_t os_freed_dnodes; 128 boolean_t os_rescan_dnodes; 129 130 /* Protected by os_obj_lock */ 131 kmutex_t os_obj_lock; 132 uint64_t os_obj_next; 133 134 /* Protected by os_lock */ 135 kmutex_t os_lock; 136 multilist_t *os_dirty_dnodes[TXG_SIZE]; 137 list_t os_dnodes; 138 list_t os_downgraded_dbufs; 139 140 /* Protects changes to DMU_{USER,GROUP}USED_OBJECT */ 141 kmutex_t os_userused_lock; 142 143 /* stuff we store for the user */ 144 kmutex_t os_user_ptr_lock; 145 void *os_user_ptr; 146 sa_os_t *os_sa; 147 }; 148 149 #define DMU_META_OBJSET 0 150 #define DMU_META_DNODE_OBJECT 0 151 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 152 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 153 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 154 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 155 156 #define DMU_OS_IS_L2CACHEABLE(os) \ 157 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 158 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 159 160 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE) 161 162 /* called from zpl */ 163 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 164 int dmu_objset_own(const char *name, dmu_objset_type_t type, 165 boolean_t readonly, void *tag, objset_t **osp); 166 int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj, 167 dmu_objset_type_t type, boolean_t readonly, void *tag, objset_t **osp); 168 void dmu_objset_refresh_ownership(struct dsl_dataset *ds, 169 struct dsl_dataset **newds, void *tag); 170 void dmu_objset_rele(objset_t *os, void *tag); 171 void dmu_objset_disown(objset_t *os, void *tag); 172 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 173 174 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 175 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 176 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 177 uint64_t *usedobjsp, uint64_t *availobjsp); 178 uint64_t dmu_objset_fsid_guid(objset_t *os); 179 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 180 int func(struct dsl_pool *, struct dsl_dataset *, void *), 181 void *arg, int flags); 182 int dmu_objset_prefetch(const char *name, void *arg); 183 void dmu_objset_evict_dbufs(objset_t *os); 184 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 185 186 /* called from dsl */ 187 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 188 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 189 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 190 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 191 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 192 objset_t **osp); 193 void dmu_objset_evict(objset_t *os); 194 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 195 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 196 boolean_t dmu_objset_userused_enabled(objset_t *os); 197 int dmu_objset_userspace_upgrade(objset_t *os); 198 boolean_t dmu_objset_userspace_present(objset_t *os); 199 int dmu_fsname(const char *snapname, char *buf); 200 201 void dmu_objset_evict_done(objset_t *os); 202 void dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx); 203 204 void dmu_objset_init(void); 205 void dmu_objset_fini(void); 206 207 #ifdef __cplusplus 208 } 209 #endif 210 211 #endif /* _SYS_DMU_OBJSET_H */ 212