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) 2011, 2018 by Delphix. All rights reserved. 24 * Copyright (c) 2013 Steven Hartland. All rights reserved. 25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26 */ 27 28#ifndef _SYS_DSL_DATASET_H 29#define _SYS_DSL_DATASET_H 30 31#include <sys/dmu.h> 32#include <sys/spa.h> 33#include <sys/txg.h> 34#include <sys/zio.h> 35#include <sys/bplist.h> 36#include <sys/dsl_synctask.h> 37#include <sys/zfs_context.h> 38#include <sys/dsl_deadlist.h> 39#include <sys/zfs_refcount.h> 40#include <sys/rrwlock.h> 41#include <sys/dsl_crypt.h> 42#include <zfeature_common.h> 43 44#ifdef __cplusplus 45extern "C" { 46#endif 47 48struct dsl_dataset; 49struct dsl_dir; 50struct dsl_pool; 51struct dsl_crypto_params; 52struct dsl_key_mapping; 53struct zfs_bookmark_phys; 54 55#define DS_FLAG_INCONSISTENT (1ULL<<0) 56#define DS_IS_INCONSISTENT(ds) \ 57 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT) 58 59/* 60 * Do not allow this dataset to be promoted. 61 */ 62#define DS_FLAG_NOPROMOTE (1ULL<<1) 63 64/* 65 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly 66 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE, 67 * refquota/refreservations). 68 */ 69#define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2) 70 71/* 72 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called 73 * on a dataset. This allows the dataset to be destroyed using 'zfs release'. 74 */ 75#define DS_FLAG_DEFER_DESTROY (1ULL<<3) 76#define DS_IS_DEFER_DESTROY(ds) \ 77 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY) 78 79/* 80 * DS_FIELD_* are strings that are used in the "extensified" dataset zap object. 81 * They should be of the format <reverse-dns>:<field>. 82 */ 83 84/* 85 * This field's value is the object ID of a zap object which contains the 86 * bookmarks of this dataset. If it is present, then this dataset is counted 87 * in the refcount of the SPA_FEATURES_BOOKMARKS feature. 88 */ 89#define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks" 90 91/* 92 * This field is present (with value=0) if this dataset may contain large 93 * dnodes (>512B). If it is present, then this dataset is counted in the 94 * refcount of the SPA_FEATURE_LARGE_DNODE feature. 95 */ 96#define DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode" 97 98/* 99 * These fields are set on datasets that are in the middle of a resumable 100 * receive, and allow the sender to resume the send if it is interrupted. 101 */ 102#define DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid" 103#define DS_FIELD_RESUME_TONAME "com.delphix:resume_toname" 104#define DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid" 105#define DS_FIELD_RESUME_OBJECT "com.delphix:resume_object" 106#define DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset" 107#define DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes" 108#define DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok" 109#define DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok" 110#define DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok" 111#define DS_FIELD_RESUME_RAWOK "com.datto:resume_rawok" 112 113/* 114 * This field is set to the object number of the remap deadlist if one exists. 115 */ 116#define DS_FIELD_REMAP_DEADLIST "com.delphix:remap_deadlist" 117 118/* 119 * We were receiving an incremental from a redaction bookmark, and these are the 120 * guids of its snapshots. 121 */ 122#define DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS \ 123 "com.delphix:resume_redact_book_snaps" 124 125/* 126 * This field is set to the ivset guid for encrypted snapshots. This is used 127 * for validating raw receives. 128 */ 129#define DS_FIELD_IVSET_GUID "com.datto:ivset_guid" 130 131/* 132 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose 133 * name lookups should be performed case-insensitively. 134 */ 135#define DS_FLAG_CI_DATASET (1ULL<<16) 136 137#define DS_CREATE_FLAG_NODIRTY (1ULL<<24) 138 139typedef struct dsl_dataset_phys { 140 uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */ 141 uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */ 142 uint64_t ds_prev_snap_txg; 143 uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */ 144 uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */ 145 uint64_t ds_num_children; /* clone/snap children; ==0 for head */ 146 uint64_t ds_creation_time; /* seconds since 1970 */ 147 uint64_t ds_creation_txg; 148 uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */ 149 /* 150 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes 151 * include all blocks referenced by this dataset, including those 152 * shared with any other datasets. 153 */ 154 uint64_t ds_referenced_bytes; 155 uint64_t ds_compressed_bytes; 156 uint64_t ds_uncompressed_bytes; 157 uint64_t ds_unique_bytes; /* only relevant to snapshots */ 158 /* 159 * The ds_fsid_guid is a 56-bit ID that can change to avoid 160 * collisions. The ds_guid is a 64-bit ID that will never 161 * change, so there is a small probability that it will collide. 162 */ 163 uint64_t ds_fsid_guid; 164 uint64_t ds_guid; 165 uint64_t ds_flags; /* DS_FLAG_* */ 166 blkptr_t ds_bp; 167 uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */ 168 uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */ 169 uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */ 170 uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */ 171} dsl_dataset_phys_t; 172 173typedef struct dsl_dataset { 174 dmu_buf_user_t ds_dbu; 175 rrwlock_t ds_bp_rwlock; /* Protects ds_phys->ds_bp */ 176 177 /* Immutable: */ 178 struct dsl_dir *ds_dir; 179 dmu_buf_t *ds_dbuf; 180 uint64_t ds_object; 181 uint64_t ds_fsid_guid; 182 boolean_t ds_is_snapshot; 183 struct dsl_key_mapping *ds_key_mapping; 184 185 /* only used in syncing context, only valid for non-snapshots: */ 186 struct dsl_dataset *ds_prev; 187 uint64_t ds_bookmarks_obj; /* DMU_OTN_ZAP_METADATA */ 188 avl_tree_t ds_bookmarks; /* dsl_bookmark_node_t */ 189 190 /* has internal locking: */ 191 dsl_deadlist_t ds_deadlist; 192 bplist_t ds_pending_deadlist; 193 194 /* 195 * The remap deadlist contains blocks (DVA's, really) that are 196 * referenced by the previous snapshot and point to indirect vdevs, 197 * but in this dataset they have been remapped to point to concrete 198 * (or at least, less-indirect) vdevs. In other words, the 199 * physical DVA is referenced by the previous snapshot but not by 200 * this dataset. Logically, the DVA continues to be referenced, 201 * but we are using a different (less indirect) physical DVA. 202 * This deadlist is used to determine when physical DVAs that 203 * point to indirect vdevs are no longer referenced anywhere, 204 * and thus should be marked obsolete. 205 * 206 * This is only used if SPA_FEATURE_OBSOLETE_COUNTS is enabled. 207 */ 208 dsl_deadlist_t ds_remap_deadlist; 209 /* protects creation of the ds_remap_deadlist */ 210 kmutex_t ds_remap_deadlist_lock; 211 212 /* protected by lock on pool's dp_dirty_datasets list */ 213 txg_node_t ds_dirty_link; 214 list_node_t ds_synced_link; 215 216 /* 217 * ds_phys->ds_<accounting> is also protected by ds_lock. 218 * Protected by ds_lock: 219 */ 220 kmutex_t ds_lock; 221 objset_t *ds_objset; 222 uint64_t ds_userrefs; 223 const void *ds_owner; 224 225 /* 226 * Long holds prevent the ds from being destroyed; they allow the 227 * ds to remain held even after dropping the dp_config_rwlock. 228 * Owning counts as a long hold. See the comments above 229 * dsl_pool_hold() for details. 230 */ 231 zfs_refcount_t ds_longholds; 232 233 /* no locking; only for making guesses */ 234 uint64_t ds_trysnap_txg; 235 236 /* for objset_open() */ 237 kmutex_t ds_opening_lock; 238 239 uint64_t ds_reserved; /* cached refreservation */ 240 uint64_t ds_quota; /* cached refquota */ 241 242 kmutex_t ds_sendstream_lock; 243 list_t ds_sendstreams; 244 245 /* 246 * When in the middle of a resumable receive, tracks how much 247 * progress we have made. 248 */ 249 uint64_t ds_resume_object[TXG_SIZE]; 250 uint64_t ds_resume_offset[TXG_SIZE]; 251 uint64_t ds_resume_bytes[TXG_SIZE]; 252 253 /* Protected by our dsl_dir's dd_lock */ 254 list_t ds_prop_cbs; 255 256 /* 257 * For ZFEATURE_FLAG_PER_DATASET features, set if this dataset 258 * uses this feature. 259 */ 260 void *ds_feature[SPA_FEATURES]; 261 262 /* 263 * Set if we need to activate the feature on this dataset this txg 264 * (used only in syncing context). 265 */ 266 void *ds_feature_activation[SPA_FEATURES]; 267 268 /* Protected by ds_lock; keep at end of struct for better locality */ 269 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; 270} dsl_dataset_t; 271 272static inline dsl_dataset_phys_t * 273dsl_dataset_phys(dsl_dataset_t *ds) 274{ 275 return ((dsl_dataset_phys_t *)ds->ds_dbuf->db_data); 276} 277 278typedef struct dsl_dataset_promote_arg { 279 const char *ddpa_clonename; 280 dsl_dataset_t *ddpa_clone; 281 list_t shared_snaps, origin_snaps, clone_snaps; 282 dsl_dataset_t *origin_origin; /* origin of the origin */ 283 uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap; 284 nvlist_t *err_ds; 285 cred_t *cr; 286 proc_t *proc; 287} dsl_dataset_promote_arg_t; 288 289typedef struct dsl_dataset_rollback_arg { 290 const char *ddra_fsname; 291 const char *ddra_tosnap; 292 void *ddra_owner; 293 nvlist_t *ddra_result; 294} dsl_dataset_rollback_arg_t; 295 296typedef struct dsl_dataset_snapshot_arg { 297 nvlist_t *ddsa_snaps; 298 nvlist_t *ddsa_props; 299 nvlist_t *ddsa_errors; 300 cred_t *ddsa_cr; 301 proc_t *ddsa_proc; 302} dsl_dataset_snapshot_arg_t; 303 304typedef struct dsl_dataset_rename_snapshot_arg { 305 const char *ddrsa_fsname; 306 const char *ddrsa_oldsnapname; 307 const char *ddrsa_newsnapname; 308 boolean_t ddrsa_recursive; 309 dmu_tx_t *ddrsa_tx; 310} dsl_dataset_rename_snapshot_arg_t; 311 312/* 313 * The max length of a temporary tag prefix is the number of hex digits 314 * required to express UINT64_MAX plus one for the hyphen. 315 */ 316#define MAX_TAG_PREFIX_LEN 17 317 318#define dsl_dataset_is_snapshot(ds) \ 319 (dsl_dataset_phys(ds)->ds_num_children != 0) 320 321#define DS_UNIQUE_IS_ACCURATE(ds) \ 322 ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0) 323 324/* flags for holding the dataset */ 325typedef enum ds_hold_flags { 326 DS_HOLD_FLAG_NONE = 0 << 0, 327 DS_HOLD_FLAG_DECRYPT = 1 << 0 /* needs access to encrypted data */ 328} ds_hold_flags_t; 329 330int dsl_dataset_hold(struct dsl_pool *dp, const char *name, const void *tag, 331 dsl_dataset_t **dsp); 332int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name, 333 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp); 334boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds, 335 const void *tag); 336int dsl_dataset_create_key_mapping(dsl_dataset_t *ds); 337int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj, 338 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **); 339void dsl_dataset_remove_key_mapping(dsl_dataset_t *ds); 340int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, 341 const void *tag, dsl_dataset_t **); 342void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags, 343 const void *tag); 344void dsl_dataset_rele(dsl_dataset_t *ds, const void *tag); 345int dsl_dataset_own(struct dsl_pool *dp, const char *name, 346 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp); 347int dsl_dataset_own_force(struct dsl_pool *dp, const char *name, 348 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp); 349int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj, 350 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp); 351int dsl_dataset_own_obj_force(struct dsl_pool *dp, uint64_t dsobj, 352 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp); 353void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, 354 const void *tag); 355void dsl_dataset_name(dsl_dataset_t *ds, char *name); 356boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, const void *tag, 357 boolean_t override); 358int dsl_dataset_namelen(dsl_dataset_t *ds); 359boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds); 360uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname, 361 dsl_dataset_t *origin, uint64_t flags, cred_t *, 362 struct dsl_crypto_params *, dmu_tx_t *); 363uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, 364 struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx); 365void dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx); 366int dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx); 367int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors); 368void dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx); 369int dsl_dataset_promote_check(void *arg, dmu_tx_t *tx); 370int dsl_dataset_promote(const char *name, char *conflsnap); 371int dsl_dataset_rename_snapshot(const char *fsname, 372 const char *oldsnapname, const char *newsnapname, boolean_t recursive); 373int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname, 374 minor_t cleanup_minor, const char *htag); 375 376blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds); 377 378spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds); 379 380boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds, 381 dsl_dataset_t *snap); 382 383void dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx); 384void dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx); 385 386void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, 387 dmu_tx_t *tx); 388int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, 389 dmu_tx_t *tx, boolean_t async); 390void dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev, 391 uint64_t offset, uint64_t size, uint64_t birth, dmu_tx_t *tx); 392int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, 393 uint64_t *value); 394 395void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx); 396 397int get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val); 398char *get_receive_resume_token(dsl_dataset_t *ds); 399uint64_t dsl_get_refratio(dsl_dataset_t *ds); 400uint64_t dsl_get_logicalreferenced(dsl_dataset_t *ds); 401uint64_t dsl_get_compressratio(dsl_dataset_t *ds); 402uint64_t dsl_get_used(dsl_dataset_t *ds); 403uint64_t dsl_get_creation(dsl_dataset_t *ds); 404uint64_t dsl_get_creationtxg(dsl_dataset_t *ds); 405uint64_t dsl_get_refquota(dsl_dataset_t *ds); 406uint64_t dsl_get_refreservation(dsl_dataset_t *ds); 407uint64_t dsl_get_guid(dsl_dataset_t *ds); 408uint64_t dsl_get_unique(dsl_dataset_t *ds); 409uint64_t dsl_get_objsetid(dsl_dataset_t *ds); 410uint64_t dsl_get_userrefs(dsl_dataset_t *ds); 411uint64_t dsl_get_defer_destroy(dsl_dataset_t *ds); 412uint64_t dsl_get_referenced(dsl_dataset_t *ds); 413uint64_t dsl_get_numclones(dsl_dataset_t *ds); 414uint64_t dsl_get_inconsistent(dsl_dataset_t *ds); 415uint64_t dsl_get_redacted(dsl_dataset_t *ds); 416uint64_t dsl_get_available(dsl_dataset_t *ds); 417int dsl_get_written(dsl_dataset_t *ds, uint64_t *written); 418int dsl_get_prev_snap(dsl_dataset_t *ds, char *snap); 419void dsl_get_redact_snaps(dsl_dataset_t *ds, nvlist_t *propval); 420int dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value, 421 char *source); 422 423void get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv); 424void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv); 425 426void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat); 427void dsl_dataset_space(dsl_dataset_t *ds, 428 uint64_t *refdbytesp, uint64_t *availbytesp, 429 uint64_t *usedobjsp, uint64_t *availobjsp); 430uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds); 431int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *newds, 432 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); 433int dsl_dataset_space_written_bookmark(struct zfs_bookmark_phys *bmp, 434 dsl_dataset_t *newds, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); 435int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last, 436 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); 437 438int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf); 439 440int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, 441 uint64_t asize, uint64_t inflight, uint64_t *used, 442 uint64_t *ref_rsrv); 443int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, 444 uint64_t quota); 445int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, 446 uint64_t reservation); 447int dsl_dataset_set_compression(const char *dsname, zprop_source_t source, 448 uint64_t compression); 449 450boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier, 451 uint64_t earlier_txg); 452void dsl_dataset_long_hold(dsl_dataset_t *ds, const void *tag); 453void dsl_dataset_long_rele(dsl_dataset_t *ds, const void *tag); 454boolean_t dsl_dataset_long_held(dsl_dataset_t *ds); 455 456int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone, 457 dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx); 458void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone, 459 dsl_dataset_t *origin_head, dmu_tx_t *tx); 460int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname, 461 dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr, proc_t *proc); 462void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, 463 dmu_tx_t *tx); 464 465void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, 466 dmu_tx_t *tx); 467void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds); 468int dsl_dataset_get_snapname(dsl_dataset_t *ds); 469int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, 470 uint64_t *value); 471int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, 472 boolean_t adj_cnt); 473void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, 474 zprop_source_t source, uint64_t value, dmu_tx_t *tx); 475void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx); 476boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds); 477boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds); 478 479int dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx); 480void dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx); 481int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner, 482 nvlist_t *result); 483 484int dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx); 485void dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx); 486 487uint64_t dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds); 488void dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx); 489boolean_t dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds); 490void dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx); 491 492void dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, void *arg, 493 dmu_tx_t *tx); 494void dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f, 495 dmu_tx_t *tx); 496boolean_t dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f); 497boolean_t dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds, 498 spa_feature_t f, uint64_t *outlength, uint64_t **outp); 499 500void dsl_dataset_activate_redaction(dsl_dataset_t *ds, uint64_t *redact_snaps, 501 uint64_t num_redact_snaps, dmu_tx_t *tx); 502 503int dsl_dataset_oldest_snapshot(spa_t *spa, uint64_t head_ds, uint64_t min_txg, 504 uint64_t *oldest_dsobj); 505 506#ifdef ZFS_DEBUG 507#define dprintf_ds(ds, fmt, ...) do { \ 508 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 509 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \ 510 dsl_dataset_name(ds, __ds_name); \ 511 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \ 512 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \ 513 } \ 514} while (0) 515#else 516#define dprintf_ds(dd, fmt, ...) 517#endif 518 519#ifdef __cplusplus 520} 521#endif 522 523#endif /* _SYS_DSL_DATASET_H */ 524