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, 2018 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 */ 27 28 /* Portions Copyright 2010 Robert Milkowski */ 29 30 #ifndef _SYS_DMU_OBJSET_H 31 #define _SYS_DMU_OBJSET_H 32 33 #include <sys/spa.h> 34 #include <sys/arc.h> 35 #include <sys/txg.h> 36 #include <sys/zfs_context.h> 37 #include <sys/dnode.h> 38 #include <sys/zio.h> 39 #include <sys/zil.h> 40 #include <sys/sa.h> 41 #include <sys/zfs_ioctl.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 extern krwlock_t os_lock; 48 49 struct dsl_pool; 50 struct dsl_dataset; 51 struct dmu_tx; 52 53 #define OBJSET_PHYS_SIZE_V1 1024 54 #define OBJSET_PHYS_SIZE_V2 2048 55 #define OBJSET_PHYS_SIZE_V3 4096 56 57 #define OBJSET_BUF_HAS_USERUSED(buf) \ 58 (arc_buf_size(buf) >= OBJSET_PHYS_SIZE_V2) 59 #define OBJSET_BUF_HAS_PROJECTUSED(buf) \ 60 (arc_buf_size(buf) >= OBJSET_PHYS_SIZE_V3) 61 62 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL << 0) 63 #define OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE (1ULL << 1) 64 #define OBJSET_FLAG_PROJECTQUOTA_COMPLETE (1ULL << 2) 65 66 /* 67 * This mask defines the set of flags which are "portable", meaning 68 * that they can be preserved when doing a raw encrypted zfs send. 69 * Flags included in this mask will be protected by os_portable_mac 70 * when the block of dnodes is encrypted. No portable flags currently 71 * exist. 72 */ 73 #define OBJSET_CRYPT_PORTABLE_FLAGS_MASK (0) 74 75 typedef struct objset_phys { 76 dnode_phys_t os_meta_dnode; 77 zil_header_t os_zil_header; 78 uint64_t os_type; 79 uint64_t os_flags; 80 uint8_t os_portable_mac[ZIO_OBJSET_MAC_LEN]; 81 uint8_t os_local_mac[ZIO_OBJSET_MAC_LEN]; 82 char os_pad0[OBJSET_PHYS_SIZE_V2 - sizeof (dnode_phys_t)*3 - 83 sizeof (zil_header_t) - sizeof (uint64_t)*2 - 84 2*ZIO_OBJSET_MAC_LEN]; 85 dnode_phys_t os_userused_dnode; 86 dnode_phys_t os_groupused_dnode; 87 dnode_phys_t os_projectused_dnode; 88 char os_pad1[OBJSET_PHYS_SIZE_V3 - OBJSET_PHYS_SIZE_V2 - 89 sizeof (dnode_phys_t)]; 90 } objset_phys_t; 91 92 typedef int (*dmu_objset_upgrade_cb_t)(objset_t *); 93 94 #define OBJSET_PROP_UNINITIALIZED ((uint64_t)-1) 95 struct objset { 96 /* Immutable: */ 97 struct dsl_dataset *os_dsl_dataset; 98 spa_t *os_spa; 99 arc_buf_t *os_phys_buf; 100 objset_phys_t *os_phys; 101 boolean_t os_encrypted; 102 103 /* 104 * The following "special" dnodes have no parent, are exempt 105 * from dnode_move(), and are not recorded in os_dnodes, but they 106 * root their descendents in this objset using handles anyway, so 107 * that all access to dnodes from dbufs consistently uses handles. 108 */ 109 dnode_handle_t os_meta_dnode; 110 dnode_handle_t os_userused_dnode; 111 dnode_handle_t os_groupused_dnode; 112 dnode_handle_t os_projectused_dnode; 113 zilog_t *os_zil; 114 115 list_node_t os_evicting_node; 116 117 /* can change, under dsl_dir's locks: */ 118 uint64_t os_dnodesize; /* default dnode size for new objects */ 119 enum zio_checksum os_checksum; 120 enum zio_compress os_compress; 121 uint8_t os_complevel; 122 uint8_t os_copies; 123 enum zio_checksum os_dedup_checksum; 124 boolean_t os_dedup_verify; 125 zfs_logbias_op_t os_logbias; 126 zfs_cache_type_t os_primary_cache; 127 zfs_cache_type_t os_secondary_cache; 128 zfs_sync_type_t os_sync; 129 zfs_redundant_metadata_type_t os_redundant_metadata; 130 uint64_t os_recordsize; 131 /* 132 * The next four values are used as a cache of whatever's on disk, and 133 * are initialized the first time these properties are queried. Before 134 * being initialized with their real values, their values are 135 * OBJSET_PROP_UNINITIALIZED. 136 */ 137 uint64_t os_version; 138 uint64_t os_normalization; 139 uint64_t os_utf8only; 140 uint64_t os_casesensitivity; 141 /* 142 * The largest zpl file block allowed in special class. 143 * cached here instead of zfsvfs for easier access. 144 */ 145 int os_zpl_special_smallblock; 146 147 /* 148 * Pointer is constant; the blkptr it points to is protected by 149 * os_dsl_dataset->ds_bp_rwlock 150 */ 151 blkptr_t *os_rootbp; 152 153 /* no lock needed: */ 154 struct dmu_tx *os_synctx; /* XXX sketchy */ 155 zil_header_t os_zil_header; 156 multilist_t os_synced_dnodes; 157 uint64_t os_flags; 158 uint64_t os_freed_dnodes; 159 boolean_t os_rescan_dnodes; 160 boolean_t os_raw_receive; 161 162 /* os_phys_buf should be written raw next txg */ 163 boolean_t os_next_write_raw[TXG_SIZE]; 164 165 /* Protected by os_obj_lock */ 166 kmutex_t os_obj_lock; 167 uint64_t os_obj_next_chunk; 168 169 /* Per-CPU next object to allocate, protected by atomic ops. */ 170 uint64_t *os_obj_next_percpu; 171 int os_obj_next_percpu_len; 172 173 /* Protected by os_lock */ 174 kmutex_t os_lock; 175 multilist_t os_dirty_dnodes[TXG_SIZE]; 176 list_t os_dnodes; 177 list_t os_downgraded_dbufs; 178 179 /* Protects changes to DMU_{USER,GROUP,PROJECT}USED_OBJECT */ 180 kmutex_t os_userused_lock; 181 182 /* stuff we store for the user */ 183 kmutex_t os_user_ptr_lock; 184 void *os_user_ptr; 185 sa_os_t *os_sa; 186 187 /* kernel thread to upgrade this dataset */ 188 kmutex_t os_upgrade_lock; 189 taskqid_t os_upgrade_id; 190 dmu_objset_upgrade_cb_t os_upgrade_cb; 191 boolean_t os_upgrade_exit; 192 int os_upgrade_status; 193 }; 194 195 #define DMU_META_OBJSET 0 196 #define DMU_META_DNODE_OBJECT 0 197 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 198 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 199 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 200 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 201 #define DMU_PROJECTUSED_DNODE(os) ((os)->os_projectused_dnode.dnh_dnode) 202 203 /* called from zpl */ 204 int dmu_objset_hold(const char *name, const void *tag, objset_t **osp); 205 int dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag, 206 objset_t **osp); 207 int dmu_objset_own(const char *name, dmu_objset_type_t type, 208 boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp); 209 int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj, 210 dmu_objset_type_t type, boolean_t readonly, boolean_t decrypt, 211 const void *tag, objset_t **osp); 212 void dmu_objset_refresh_ownership(struct dsl_dataset *ds, 213 struct dsl_dataset **newds, boolean_t decrypt, const void *tag); 214 void dmu_objset_rele(objset_t *os, const void *tag); 215 void dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag); 216 void dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag); 217 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 218 219 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 220 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 221 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 222 uint64_t *usedobjsp, uint64_t *availobjsp); 223 uint64_t dmu_objset_fsid_guid(objset_t *os); 224 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 225 int func(struct dsl_pool *, struct dsl_dataset *, void *), 226 void *arg, int flags); 227 void dmu_objset_evict_dbufs(objset_t *os); 228 inode_timespec_t dmu_objset_snap_cmtime(objset_t *os); 229 230 /* called from dsl */ 231 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 232 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 233 objset_t *dmu_objset_create_impl_dnstats(spa_t *spa, struct dsl_dataset *ds, 234 blkptr_t *bp, dmu_objset_type_t type, int levels, int blksz, int ibs, 235 dmu_tx_t *tx); 236 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 237 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 238 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 239 objset_t **osp); 240 void dmu_objset_evict(objset_t *os); 241 void dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx); 242 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 243 boolean_t dmu_objset_userused_enabled(objset_t *os); 244 void dmu_objset_userspace_upgrade(objset_t *os); 245 boolean_t dmu_objset_userspace_present(objset_t *os); 246 boolean_t dmu_objset_userobjused_enabled(objset_t *os); 247 boolean_t dmu_objset_userobjspace_upgradable(objset_t *os); 248 boolean_t dmu_objset_userobjspace_present(objset_t *os); 249 boolean_t dmu_objset_incompatible_encryption_version(objset_t *os); 250 boolean_t dmu_objset_projectquota_enabled(objset_t *os); 251 boolean_t dmu_objset_projectquota_present(objset_t *os); 252 boolean_t dmu_objset_projectquota_upgradable(objset_t *os); 253 void dmu_objset_id_quota_upgrade(objset_t *os); 254 int dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype, 255 const void *data, zfs_file_info_t *zfi); 256 257 int dmu_fsname(const char *snapname, char *buf); 258 259 void dmu_objset_evict_done(objset_t *os); 260 void dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx); 261 262 void dmu_objset_init(void); 263 void dmu_objset_fini(void); 264 265 #ifdef __cplusplus 266 } 267 #endif 268 269 #endif /* _SYS_DMU_OBJSET_H */ 270