1 789 ahrens /* 2 789 ahrens * CDDL HEADER START 3 789 ahrens * 4 789 ahrens * The contents of this file are subject to the terms of the 5 1544 eschrock * Common Development and Distribution License (the "License"). 6 1544 eschrock * You may not use this file except in compliance with the License. 7 789 ahrens * 8 789 ahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 789 ahrens * or http://www.opensolaris.org/os/licensing. 10 789 ahrens * See the License for the specific language governing permissions 11 789 ahrens * and limitations under the License. 12 789 ahrens * 13 789 ahrens * When distributing Covered Code, include this CDDL HEADER in each 14 789 ahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 789 ahrens * If applicable, add the following below this CDDL HEADER, with the 16 789 ahrens * fields enclosed by brackets "[]" replaced with your own identifying 17 789 ahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18 789 ahrens * 19 789 ahrens * CDDL HEADER END 20 789 ahrens */ 21 789 ahrens /* 22 9653 Sanjeev * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 789 ahrens * Use is subject to license terms. 24 789 ahrens */ 25 789 ahrens 26 789 ahrens #ifndef _SYS_DSL_DATASET_H 27 789 ahrens #define _SYS_DSL_DATASET_H 28 789 ahrens 29 789 ahrens #include <sys/dmu.h> 30 789 ahrens #include <sys/spa.h> 31 789 ahrens #include <sys/txg.h> 32 3547 maybee #include <sys/zio.h> 33 789 ahrens #include <sys/bplist.h> 34 2199 ahrens #include <sys/dsl_synctask.h> 35 789 ahrens #include <sys/zfs_context.h> 36 789 ahrens 37 789 ahrens #ifdef __cplusplus 38 789 ahrens extern "C" { 39 789 ahrens #endif 40 789 ahrens 41 789 ahrens struct dsl_dataset; 42 789 ahrens struct dsl_dir; 43 789 ahrens struct dsl_pool; 44 789 ahrens 45 2082 eschrock #define DS_FLAG_INCONSISTENT (1ULL<<0) 46 6689 maybee #define DS_IS_INCONSISTENT(ds) \ 47 6689 maybee ((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) 48 2082 eschrock /* 49 2082 eschrock * NB: nopromote can not yet be set, but we want support for it in this 50 2082 eschrock * on-disk version, so that we don't need to upgrade for it later. It 51 2082 eschrock * will be needed when we implement 'zfs split' (where the split off 52 2082 eschrock * clone should not be promoted). 53 2082 eschrock */ 54 2082 eschrock #define DS_FLAG_NOPROMOTE (1ULL<<1) 55 5378 ck153898 56 5378 ck153898 /* 57 5378 ck153898 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly 58 5378 ck153898 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE, 59 5378 ck153898 * refquota/refreservations). 60 5378 ck153898 */ 61 5378 ck153898 #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2) 62 6492 timh 63 6492 timh /* 64 10242 chris * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called 65 10242 chris * on a dataset. This allows the dataset to be destroyed using 'zfs release'. 66 10242 chris */ 67 10242 chris #define DS_FLAG_DEFER_DESTROY (1ULL<<3) 68 10242 chris #define DS_IS_DEFER_DESTROY(ds) \ 69 10242 chris ((ds)->ds_phys->ds_flags & DS_FLAG_DEFER_DESTROY) 70 10242 chris 71 10242 chris /* 72 6492 timh * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose 73 6492 timh * name lookups should be performed case-insensitively. 74 6492 timh */ 75 6492 timh #define DS_FLAG_CI_DATASET (1ULL<<16) 76 2082 eschrock 77 789 ahrens typedef struct dsl_dataset_phys { 78 7046 ahrens uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */ 79 7046 ahrens uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */ 80 789 ahrens uint64_t ds_prev_snap_txg; 81 7046 ahrens uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */ 82 7046 ahrens uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */ 83 789 ahrens uint64_t ds_num_children; /* clone/snap children; ==0 for head */ 84 789 ahrens uint64_t ds_creation_time; /* seconds since 1970 */ 85 789 ahrens uint64_t ds_creation_txg; 86 7046 ahrens uint64_t ds_deadlist_obj; /* DMU_OT_BPLIST */ 87 789 ahrens uint64_t ds_used_bytes; 88 789 ahrens uint64_t ds_compressed_bytes; 89 789 ahrens uint64_t ds_uncompressed_bytes; 90 3517 mp204432 uint64_t ds_unique_bytes; /* only relevant to snapshots */ 91 789 ahrens /* 92 789 ahrens * The ds_fsid_guid is a 56-bit ID that can change to avoid 93 789 ahrens * collisions. The ds_guid is a 64-bit ID that will never 94 789 ahrens * change, so there is a small probability that it will collide. 95 789 ahrens */ 96 789 ahrens uint64_t ds_fsid_guid; 97 789 ahrens uint64_t ds_guid; 98 7046 ahrens uint64_t ds_flags; /* DS_FLAG_* */ 99 789 ahrens blkptr_t ds_bp; 100 7265 ahrens uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */ 101 7265 ahrens uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */ 102 10242 chris uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */ 103 10242 chris uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */ 104 789 ahrens } dsl_dataset_phys_t; 105 789 ahrens 106 789 ahrens typedef struct dsl_dataset { 107 789 ahrens /* Immutable: */ 108 789 ahrens struct dsl_dir *ds_dir; 109 789 ahrens dsl_dataset_phys_t *ds_phys; 110 789 ahrens dmu_buf_t *ds_dbuf; 111 789 ahrens uint64_t ds_object; 112 4787 ahrens uint64_t ds_fsid_guid; 113 789 ahrens 114 7390 Matthew /* only used in syncing context, only valid for non-snapshots: */ 115 7390 Matthew struct dsl_dataset *ds_prev; 116 7390 Matthew uint64_t ds_origin_txg; 117 789 ahrens 118 789 ahrens /* has internal locking: */ 119 789 ahrens bplist_t ds_deadlist; 120 10204 Matthew 121 10204 Matthew /* to protect against multiple concurrent incremental recv */ 122 10204 Matthew kmutex_t ds_recvlock; 123 789 ahrens 124 789 ahrens /* protected by lock on pool's dp_dirty_datasets list */ 125 789 ahrens txg_node_t ds_dirty_link; 126 789 ahrens list_node_t ds_synced_link; 127 789 ahrens 128 789 ahrens /* 129 789 ahrens * ds_phys->ds_<accounting> is also protected by ds_lock. 130 789 ahrens * Protected by ds_lock: 131 789 ahrens */ 132 789 ahrens kmutex_t ds_lock; 133 10298 Matthew objset_t *ds_objset; 134 10242 chris uint64_t ds_userrefs; 135 6689 maybee 136 6689 maybee /* 137 6689 maybee * ds_owner is protected by the ds_rwlock and the ds_lock 138 6689 maybee */ 139 6689 maybee krwlock_t ds_rwlock; 140 6689 maybee kcondvar_t ds_exclusive_cv; 141 6689 maybee void *ds_owner; 142 789 ahrens 143 2199 ahrens /* no locking; only for making guesses */ 144 2199 ahrens uint64_t ds_trysnap_txg; 145 4787 ahrens 146 4787 ahrens /* for objset_open() */ 147 4787 ahrens kmutex_t ds_opening_lock; 148 2199 ahrens 149 5378 ck153898 uint64_t ds_reserved; /* cached refreservation */ 150 5378 ck153898 uint64_t ds_quota; /* cached refquota */ 151 5378 ck153898 152 789 ahrens /* Protected by ds_lock; keep at end of struct for better locality */ 153 789 ahrens char ds_snapname[MAXNAMELEN]; 154 789 ahrens } dsl_dataset_t; 155 10242 chris 156 10242 chris struct dsl_ds_destroyarg { 157 10242 chris dsl_dataset_t *ds; /* ds to destroy */ 158 10242 chris dsl_dataset_t *rm_origin; /* also remove our origin? */ 159 10242 chris boolean_t is_origin_rm; /* set if removing origin snap */ 160 10242 chris boolean_t defer; /* destroy -d requested? */ 161 10242 chris boolean_t releasing; /* destroying due to release? */ 162 10242 chris boolean_t need_prep; /* do we need to retry due to EBUSY? */ 163 10242 chris }; 164 789 ahrens 165 789 ahrens #define dsl_dataset_is_snapshot(ds) \ 166 789 ahrens ((ds)->ds_phys->ds_num_children != 0) 167 5378 ck153898 168 5378 ck153898 #define DS_UNIQUE_IS_ACCURATE(ds) \ 169 5378 ck153898 (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0) 170 789 ahrens 171 6689 maybee int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp); 172 6689 maybee int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, 173 6689 maybee void *tag, dsl_dataset_t **); 174 10298 Matthew int dsl_dataset_own(const char *name, boolean_t inconsistentok, 175 10298 Matthew void *tag, dsl_dataset_t **dsp); 176 6689 maybee int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj, 177 10298 Matthew boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp); 178 789 ahrens void dsl_dataset_name(dsl_dataset_t *ds, char *name); 179 6689 maybee void dsl_dataset_rele(dsl_dataset_t *ds, void *tag); 180 10298 Matthew void dsl_dataset_disown(dsl_dataset_t *ds, void *tag); 181 7046 ahrens void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag); 182 6689 maybee boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok, 183 10298 Matthew void *tag); 184 10298 Matthew void dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *tag); 185 6689 maybee uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname, 186 6689 maybee dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *); 187 7046 ahrens uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 188 7046 ahrens uint64_t flags, dmu_tx_t *tx); 189 10242 chris int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer); 190 10242 chris int dsl_snapshots_destroy(char *fsname, char *snapname, boolean_t defer); 191 5367 ahrens dsl_checkfunc_t dsl_dataset_destroy_check; 192 5367 ahrens dsl_syncfunc_t dsl_dataset_destroy_sync; 193 2199 ahrens dsl_checkfunc_t dsl_dataset_snapshot_check; 194 2199 ahrens dsl_syncfunc_t dsl_dataset_snapshot_sync; 195 4007 mmusante int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive); 196 10588 Eric int dsl_dataset_promote(const char *name, char *conflsnap); 197 5367 ahrens int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, 198 5367 ahrens boolean_t force); 199 10242 chris int dsl_dataset_user_hold(char *dsname, char *snapname, char *htag, 200 10342 chris boolean_t recursive, boolean_t temphold); 201 10242 chris int dsl_dataset_user_release(char *dsname, char *snapname, char *htag, 202 10242 chris boolean_t recursive); 203 10342 chris int dsl_dataset_user_release_tmp(struct dsl_pool *dp, uint64_t dsobj, 204 10342 chris char *htag); 205 10242 chris int dsl_dataset_get_holds(const char *dsname, nvlist_t **nvp); 206 789 ahrens 207 3547 maybee blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds); 208 789 ahrens void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx); 209 789 ahrens 210 789 ahrens spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds); 211 5326 ek110237 212 5326 ek110237 boolean_t dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds); 213 789 ahrens 214 3547 maybee void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx); 215 789 ahrens 216 10922 Jeff void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, 217 3547 maybee dmu_tx_t *tx); 218 10922 Jeff int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, 219 10922 Jeff dmu_tx_t *tx, boolean_t async); 220 9653 Sanjeev boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth); 221 1544 eschrock uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds); 222 789 ahrens 223 789 ahrens void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx); 224 2885 ahrens void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv); 225 2885 ahrens void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat); 226 2885 ahrens void dsl_dataset_space(dsl_dataset_t *ds, 227 2885 ahrens uint64_t *refdbytesp, uint64_t *availbytesp, 228 2885 ahrens uint64_t *usedobjsp, uint64_t *availobjsp); 229 2885 ahrens uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds); 230 789 ahrens 231 3912 lling int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf); 232 3912 lling 233 5378 ck153898 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 234 5831 ck153898 uint64_t asize, uint64_t inflight, uint64_t *used, 235 5831 ck153898 uint64_t *ref_rsrv); 236 11022 Tom int dsl_dataset_set_quota(const char *dsname, zprop_source_t source, 237 11022 Tom uint64_t quota); 238 5378 ck153898 void dsl_dataset_set_quota_sync(void *arg1, void *arg2, cred_t *cr, 239 5378 ck153898 dmu_tx_t *tx); 240 11022 Tom int dsl_dataset_set_reservation(const char *dsname, zprop_source_t source, 241 11022 Tom uint64_t reservation); 242 5378 ck153898 243 10298 Matthew int dsl_destroy_inconsistent(char *dsname, void *arg); 244 10298 Matthew 245 789 ahrens #ifdef ZFS_DEBUG 246 789 ahrens #define dprintf_ds(ds, fmt, ...) do { \ 247 789 ahrens if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 248 789 ahrens char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \ 249 789 ahrens dsl_dataset_name(ds, __ds_name); \ 250 789 ahrens dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \ 251 789 ahrens kmem_free(__ds_name, MAXNAMELEN); \ 252 789 ahrens } \ 253 789 ahrens _NOTE(CONSTCOND) } while (0) 254 789 ahrens #else 255 789 ahrens #define dprintf_ds(dd, fmt, ...) 256 789 ahrens #endif 257 789 ahrens 258 789 ahrens #ifdef __cplusplus 259 789 ahrens } 260 789 ahrens #endif 261 789 ahrens 262 789 ahrens #endif /* _SYS_DSL_DATASET_H */ 263
Indexes created Fri Nov 27 04:12:29 UTC 2009
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