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