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 * 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 uint64_t os_dnodesize; /* default dnode size for new objects */ 95 enum zio_checksum os_checksum; 96 enum zio_compress os_compress; 97 uint8_t os_copies; 98 enum zio_checksum os_dedup_checksum; 99 boolean_t os_dedup_verify; 100 zfs_logbias_op_t os_logbias; 101 zfs_cache_type_t os_primary_cache; 102 zfs_cache_type_t os_secondary_cache; 103 zfs_sync_type_t os_sync; 104 zfs_redundant_metadata_type_t os_redundant_metadata; 105 int os_recordsize; 106 /* 107 * The next four values are used as a cache of whatever's on disk, and 108 * are initialized the first time these properties are queried. Before 109 * being initialized with their real values, their values are 110 * OBJSET_PROP_UNINITIALIZED. 111 */ 112 uint64_t os_version; 113 uint64_t os_normalization; 114 uint64_t os_utf8only; 115 uint64_t os_casesensitivity; 116 /* 117 * The largest zpl file block allowed in special class. 118 * cached here instead of zfsvfs for easier access. 119 */ 120 int os_zpl_special_smallblock; 121 122 /* 123 * Pointer is constant; the blkptr it points to is protected by 124 * os_dsl_dataset->ds_bp_rwlock 125 */ 126 blkptr_t *os_rootbp; 127 128 /* no lock needed: */ 129 struct dmu_tx *os_synctx; /* XXX sketchy */ 130 zil_header_t os_zil_header; 131 multilist_t *os_synced_dnodes; 132 uint64_t os_flags; 133 uint64_t os_freed_dnodes; 134 boolean_t os_rescan_dnodes; 135 136 /* Protected by os_obj_lock */ 137 kmutex_t os_obj_lock; 138 uint64_t os_obj_next_chunk; 139 140 /* Per-CPU next object to allocate, protected by atomic ops. */ 141 uint64_t *os_obj_next_percpu; 142 int os_obj_next_percpu_len; 143 144 /* Protected by os_lock */ 145 kmutex_t os_lock; 146 multilist_t *os_dirty_dnodes[TXG_SIZE]; 147 list_t os_dnodes; 148 list_t os_downgraded_dbufs; 149 150 /* Protects changes to DMU_{USER,GROUP}USED_OBJECT */ 151 kmutex_t os_userused_lock; 152 153 /* stuff we store for the user */ 154 kmutex_t os_user_ptr_lock; 155 void *os_user_ptr; 156 sa_os_t *os_sa; 157 }; 158 159 #define DMU_META_OBJSET 0 160 #define DMU_META_DNODE_OBJECT 0 161 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 162 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 163 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 164 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 165 166 #define DMU_OS_IS_L2CACHEABLE(os) \ 167 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 168 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 169 170 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE) 171 172 /* called from zpl */ 173 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 174 int dmu_objset_own(const char *name, dmu_objset_type_t type, 175 boolean_t readonly, void *tag, objset_t **osp); 176 int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj, 177 dmu_objset_type_t type, boolean_t readonly, void *tag, objset_t **osp); 178 void dmu_objset_refresh_ownership(struct dsl_dataset *ds, 179 struct dsl_dataset **newds, void *tag); 180 void dmu_objset_rele(objset_t *os, void *tag); 181 void dmu_objset_disown(objset_t *os, void *tag); 182 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 183 184 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 185 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 186 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 187 uint64_t *usedobjsp, uint64_t *availobjsp); 188 uint64_t dmu_objset_fsid_guid(objset_t *os); 189 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 190 int func(struct dsl_pool *, struct dsl_dataset *, void *), 191 void *arg, int flags); 192 int dmu_objset_prefetch(const char *name, void *arg); 193 void dmu_objset_evict_dbufs(objset_t *os); 194 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 195 196 /* called from dsl */ 197 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 198 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 199 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 200 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 201 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 202 objset_t **osp); 203 void dmu_objset_evict(objset_t *os); 204 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 205 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 206 boolean_t dmu_objset_userused_enabled(objset_t *os); 207 int dmu_objset_userspace_upgrade(objset_t *os); 208 boolean_t dmu_objset_userspace_present(objset_t *os); 209 int dmu_fsname(const char *snapname, char *buf); 210 211 void dmu_objset_evict_done(objset_t *os); 212 void dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx); 213 214 void dmu_objset_init(void); 215 void dmu_objset_fini(void); 216 217 #ifdef __cplusplus 218 } 219 #endif 220 221 #endif /* _SYS_DMU_OBJSET_H */ 222