include/sys/dmu_objset.h

   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 https://opensource.org/licenses/CDDL-1.0.
  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 #if defined(__clang__)
  76 #pragma clang diagnostic push
  77 #pragma clang diagnostic ignored "-Wgnu-variable-sized-type-not-at-end"
  78 #endif
  79 typedef struct objset_phys {
  80         dnode_phys_t os_meta_dnode;
  81         zil_header_t os_zil_header;
  82         uint64_t os_type;
  83         uint64_t os_flags;
  84         uint8_t os_portable_mac[ZIO_OBJSET_MAC_LEN];
  85         uint8_t os_local_mac[ZIO_OBJSET_MAC_LEN];
  86         char os_pad0[OBJSET_PHYS_SIZE_V2 - sizeof (dnode_phys_t)*3 -
  87             sizeof (zil_header_t) - sizeof (uint64_t)*2 -
  88             2*ZIO_OBJSET_MAC_LEN];
  89         dnode_phys_t os_userused_dnode;
  90         dnode_phys_t os_groupused_dnode;
  91         dnode_phys_t os_projectused_dnode;
  92         char os_pad1[OBJSET_PHYS_SIZE_V3 - OBJSET_PHYS_SIZE_V2 -
  93             sizeof (dnode_phys_t)];
  94 } objset_phys_t;
  95 #if defined(__clang__)
  96 #pragma clang diagnostic pop
  97 #endif
  98
  99 typedef int (*dmu_objset_upgrade_cb_t)(objset_t *);
 100
 101 #define OBJSET_PROP_UNINITIALIZED       ((uint64_t)-1)
 102 struct objset {
 103         /* Immutable: */
 104         struct dsl_dataset *os_dsl_dataset;
 105         spa_t *os_spa;
 106         arc_buf_t *os_phys_buf;
 107         objset_phys_t *os_phys;
 108         boolean_t os_encrypted;
 109
 110         /*
 111          * The following "special" dnodes have no parent, are exempt
 112          * from dnode_move(), and are not recorded in os_dnodes, but they
 113          * root their descendents in this objset using handles anyway, so
 114          * that all access to dnodes from dbufs consistently uses handles.
 115          */
 116         dnode_handle_t os_meta_dnode;
 117         dnode_handle_t os_userused_dnode;
 118         dnode_handle_t os_groupused_dnode;
 119         dnode_handle_t os_projectused_dnode;
 120         zilog_t *os_zil;
 121
 122         list_node_t os_evicting_node;
 123
 124         /* can change, under dsl_dir's locks: */
 125         uint64_t os_dnodesize; /* default dnode size for new objects */
 126         enum zio_checksum os_checksum;
 127         enum zio_compress os_compress;
 128         uint8_t os_complevel;
 129         uint8_t os_copies;
 130         enum zio_checksum os_dedup_checksum;
 131         boolean_t os_dedup_verify;
 132         zfs_logbias_op_t os_logbias;
 133         zfs_cache_type_t os_primary_cache;
 134         zfs_cache_type_t os_secondary_cache;
 135         zfs_prefetch_type_t os_prefetch;
 136         zfs_sync_type_t os_sync;
 137         zfs_direct_t os_direct;
 138         zfs_redundant_metadata_type_t os_redundant_metadata;
 139         uint64_t os_recordsize;
 140         /*
 141          * The next four values are used as a cache of whatever's on disk, and
 142          * are initialized the first time these properties are queried. Before
 143          * being initialized with their real values, their values are
 144          * OBJSET_PROP_UNINITIALIZED.
 145          */
 146         uint64_t os_version;
 147         uint64_t os_normalization;
 148         uint64_t os_utf8only;
 149         uint64_t os_casesensitivity;
 150         /*
 151          * The largest zpl file block allowed in special class.
 152          * cached here instead of zfsvfs for easier access.
 153          */
 154         int os_zpl_special_smallblock;
 155
 156         /*
 157          * Pointer is constant; the blkptr it points to is protected by
 158          * os_dsl_dataset->ds_bp_rwlock
 159          */
 160         blkptr_t *os_rootbp;
 161
 162         /* no lock needed: */
 163         struct dmu_tx *os_synctx; /* XXX sketchy */
 164         zil_header_t os_zil_header;
 165         multilist_t os_synced_dnodes;
 166         uint64_t os_flags;
 167         uint64_t os_freed_dnodes;
 168         boolean_t os_rescan_dnodes;
 169         boolean_t os_raw_receive;
 170
 171         /* os_phys_buf should be written raw next txg */
 172         boolean_t os_next_write_raw[TXG_SIZE];
 173
 174         /* Protected by os_obj_lock */
 175         kmutex_t os_obj_lock;
 176         uint64_t os_obj_next_chunk;
 177
 178         /* Per-CPU next object to allocate, protected by atomic ops. */
 179         uint64_t *os_obj_next_percpu;
 180         int os_obj_next_percpu_len;
 181
 182         /* Protected by os_lock */
 183         kmutex_t os_lock;
 184         multilist_t os_dirty_dnodes[TXG_SIZE];
 185         list_t os_dnodes;
 186         list_t os_downgraded_dbufs;
 187
 188         /* Protects changes to DMU_{USER,GROUP,PROJECT}USED_OBJECT */
 189         kmutex_t os_userused_lock;
 190
 191         /* stuff we store for the user */
 192         kmutex_t os_user_ptr_lock;
 193         void *os_user_ptr;
 194         sa_os_t *os_sa;
 195
 196         /* kernel thread to upgrade this dataset */
 197         kmutex_t os_upgrade_lock;
 198         taskqid_t os_upgrade_id;
 199         dmu_objset_upgrade_cb_t os_upgrade_cb;
 200         boolean_t os_upgrade_exit;
 201         int os_upgrade_status;
 202 };
 203
 204 #define DMU_META_OBJSET         0
 205 #define DMU_META_DNODE_OBJECT   0
 206 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
 207 #define DMU_META_DNODE(os)      ((os)->os_meta_dnode.dnh_dnode)
 208 #define DMU_USERUSED_DNODE(os)  ((os)->os_userused_dnode.dnh_dnode)
 209 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
 210 #define DMU_PROJECTUSED_DNODE(os) ((os)->os_projectused_dnode.dnh_dnode)
 211
 212 /* called from zpl */
 213 int dmu_objset_hold(const char *name, const void *tag, objset_t **osp);
 214 int dmu_objset_hold_flags(const char *name, boolean_t decrypt, const void *tag,
 215     objset_t **osp);
 216 int dmu_objset_own(const char *name, dmu_objset_type_t type,
 217     boolean_t readonly, boolean_t decrypt, const void *tag, objset_t **osp);
 218 int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj,
 219     dmu_objset_type_t type, boolean_t readonly, boolean_t decrypt,
 220     const void *tag, objset_t **osp);
 221 void dmu_objset_refresh_ownership(struct dsl_dataset *ds,
 222     struct dsl_dataset **newds, boolean_t decrypt, const void *tag);
 223 void dmu_objset_rele(objset_t *os, const void *tag);
 224 void dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, const void *tag);
 225 void dmu_objset_disown(objset_t *os, boolean_t decrypt, const void *tag);
 226 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
 227
 228 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
 229 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
 230 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
 231     uint64_t *usedobjsp, uint64_t *availobjsp);
 232 uint64_t dmu_objset_fsid_guid(objset_t *os);
 233 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj,
 234     int func(struct dsl_pool *, struct dsl_dataset *, void *),
 235     void *arg, int flags);
 236 void dmu_objset_evict_dbufs(objset_t *os);
 237 inode_timespec_t dmu_objset_snap_cmtime(objset_t *os);
 238
 239 /* called from dsl */
 240 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
 241 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
 242 objset_t *dmu_objset_create_impl_dnstats(spa_t *spa, struct dsl_dataset *ds,
 243     blkptr_t *bp, dmu_objset_type_t type, int levels, int blksz, int ibs,
 244     dmu_tx_t *tx);
 245 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
 246     blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
 247 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
 248     objset_t **osp);
 249 void dmu_objset_evict(objset_t *os);
 250 void dmu_objset_sync_done(objset_t *os, dmu_tx_t *tx);
 251 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
 252 boolean_t dmu_objset_userused_enabled(objset_t *os);
 253 void dmu_objset_userspace_upgrade(objset_t *os);
 254 boolean_t dmu_objset_userspace_present(objset_t *os);
 255 boolean_t dmu_objset_userobjused_enabled(objset_t *os);
 256 boolean_t dmu_objset_userobjspace_upgradable(objset_t *os);
 257 boolean_t dmu_objset_userobjspace_present(objset_t *os);
 258 boolean_t dmu_objset_incompatible_encryption_version(objset_t *os);
 259 boolean_t dmu_objset_projectquota_enabled(objset_t *os);
 260 boolean_t dmu_objset_projectquota_present(objset_t *os);
 261 boolean_t dmu_objset_projectquota_upgradable(objset_t *os);
 262 void dmu_objset_id_quota_upgrade(objset_t *os);
 263 int dmu_get_file_info(objset_t *os, dmu_object_type_t bonustype,
 264     const void *data, zfs_file_info_t *zfi);
 265
 266 int dmu_fsname(const char *snapname, char *buf);
 267
 268 void dmu_objset_evict_done(objset_t *os);
 269 void dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx);
 270
 271 void dmu_objset_init(void);
 272 void dmu_objset_fini(void);
 273
 274 #ifdef  __cplusplus
 275 }
 276 #endif
 277
 278 #endif /* _SYS_DMU_OBJSET_H */