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 *
dsl_dataset_phys(dsl_dataset_t * ds)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_NONE = 0 << 0,
320 DS_HOLD_FLAG_DECRYPT = 1 << 0 /* needs access to encrypted data */
321 } ds_hold_flags_t;
322
323 int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
324 dsl_dataset_t **dsp);
325 int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name,
326 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
327 boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
328 void *tag);
329 int dsl_dataset_create_key_mapping(dsl_dataset_t *ds);
330 int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj,
331 ds_hold_flags_t flags, void *tag, dsl_dataset_t **);
332 void dsl_dataset_remove_key_mapping(dsl_dataset_t *ds);
333 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
334 void *tag, dsl_dataset_t **);
335 void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
336 void *tag);
337 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
338 int dsl_dataset_own(struct dsl_pool *dp, const char *name,
339 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
340 int dsl_dataset_own_force(struct dsl_pool *dp, const char *name,
341 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
342 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
343 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
344 int dsl_dataset_own_obj_force(struct dsl_pool *dp, uint64_t dsobj,
345 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
346 void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag);
347 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
348 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag, boolean_t override);
349 int dsl_dataset_namelen(dsl_dataset_t *ds);
350 boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
351 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
352 dsl_dataset_t *origin, uint64_t flags, cred_t *,
353 struct dsl_crypto_params *, dmu_tx_t *);
354 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
355 struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx);
356 void dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx);
357 int dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx);
358 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
359 void dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx);
360 int dsl_dataset_promote_check(void *arg, dmu_tx_t *tx);
361 int dsl_dataset_promote(const char *name, char *conflsnap);
362 int dsl_dataset_rename_snapshot(const char *fsname,
363 const char *oldsnapname, const char *newsnapname, boolean_t recursive);
364 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
365 minor_t cleanup_minor, const char *htag);
366
367 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
368
369 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
370
371 boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
372 dsl_dataset_t *snap);
373
374 void dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx);
375 void dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx);
376
377 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
378 dmu_tx_t *tx);
379 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
380 dmu_tx_t *tx, boolean_t async);
381 void dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev,
382 uint64_t offset, uint64_t size, uint64_t birth, dmu_tx_t *tx);
383 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
384 uint64_t *value);
385
386 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
387
388 int get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val);
389 char *get_receive_resume_stats_impl(dsl_dataset_t *ds);
390 char *get_child_receive_stats(dsl_dataset_t *ds);
391 uint64_t dsl_get_refratio(dsl_dataset_t *ds);
392 uint64_t dsl_get_logicalreferenced(dsl_dataset_t *ds);
393 uint64_t dsl_get_compressratio(dsl_dataset_t *ds);
394 uint64_t dsl_get_used(dsl_dataset_t *ds);
395 uint64_t dsl_get_creation(dsl_dataset_t *ds);
396 uint64_t dsl_get_creationtxg(dsl_dataset_t *ds);
397 uint64_t dsl_get_refquota(dsl_dataset_t *ds);
398 uint64_t dsl_get_refreservation(dsl_dataset_t *ds);
399 uint64_t dsl_get_guid(dsl_dataset_t *ds);
400 uint64_t dsl_get_unique(dsl_dataset_t *ds);
401 uint64_t dsl_get_objsetid(dsl_dataset_t *ds);
402 uint64_t dsl_get_userrefs(dsl_dataset_t *ds);
403 uint64_t dsl_get_defer_destroy(dsl_dataset_t *ds);
404 uint64_t dsl_get_referenced(dsl_dataset_t *ds);
405 uint64_t dsl_get_numclones(dsl_dataset_t *ds);
406 uint64_t dsl_get_inconsistent(dsl_dataset_t *ds);
407 uint64_t dsl_get_redacted(dsl_dataset_t *ds);
408 uint64_t dsl_get_available(dsl_dataset_t *ds);
409 int dsl_get_written(dsl_dataset_t *ds, uint64_t *written);
410 int dsl_get_prev_snap(dsl_dataset_t *ds, char *snap);
411 void dsl_get_redact_snaps(dsl_dataset_t *ds, nvlist_t *propval);
412 int dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value,
413 char *source);
414
415 void get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv);
416 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
417
418 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
419 void dsl_dataset_space(dsl_dataset_t *ds,
420 uint64_t *refdbytesp, uint64_t *availbytesp,
421 uint64_t *usedobjsp, uint64_t *availobjsp);
422 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
423 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *newds,
424 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
425 int dsl_dataset_space_written_bookmark(struct zfs_bookmark_phys *bmp,
426 dsl_dataset_t *newds, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
427 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
428 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
429
430 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
431
432 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
433 uint64_t asize, uint64_t inflight, uint64_t *used,
434 uint64_t *ref_rsrv);
435 int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
436 uint64_t quota);
437 int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
438 uint64_t reservation);
439 int dsl_dataset_set_compression(const char *dsname, zprop_source_t source,
440 uint64_t compression);
441
442 boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
443 uint64_t earlier_txg);
444 void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
445 void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
446 boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
447
448 int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
449 dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
450 void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
451 dsl_dataset_t *origin_head, dmu_tx_t *tx);
452 int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
453 dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr, proc_t *proc);
454 void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
455 dmu_tx_t *tx);
456
457 void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
458 dmu_tx_t *tx);
459 void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
460 int dsl_dataset_get_snapname(dsl_dataset_t *ds);
461 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
462 uint64_t *value);
463 int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
464 boolean_t adj_cnt);
465 void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
466 zprop_source_t source, uint64_t value, dmu_tx_t *tx);
467 void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
468 boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds);
469 boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds);
470
471 int dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx);
472 void dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx);
473 int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner,
474 nvlist_t *result);
475
476 uint64_t dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds);
477 void dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx);
478 boolean_t dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds);
479 void dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx);
480
481 void dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, void *arg,
482 dmu_tx_t *tx);
483 void dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f,
484 dmu_tx_t *tx);
485 boolean_t dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f);
486 boolean_t dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds,
487 spa_feature_t f, uint64_t *outlength, uint64_t **outp);
488
489 void dsl_dataset_activate_redaction(dsl_dataset_t *ds, uint64_t *redact_snaps,
490 uint64_t num_redact_snaps, dmu_tx_t *tx);
491
492 #ifdef ZFS_DEBUG
493 #define dprintf_ds(ds, fmt, ...) do { \
494 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
495 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
496 dsl_dataset_name(ds, __ds_name); \
497 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
498 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
499 } \
500 _NOTE(CONSTCOND) } while (0)
501 #else
502 #define dprintf_ds(dd, fmt, ...)
503 #endif
504
505 #ifdef __cplusplus
506 }
507 #endif
508
509 #endif /* _SYS_DSL_DATASET_H */
510