1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * This file and its contents are supplied under the terms of the
4 * Common Development and Distribution License ("CDDL"), version 1.0.
5 * You may only use this file in accordance with the terms of version
6 * 1.0 of the CDDL.
7 *
8 * A full copy of the text of the CDDL should have accompanied this
9 * source. A copy of the CDDL is also available via the Internet at
10 * https://opensource.org/license/CDDL-1.0.
11 */
12 /*
13 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
14 * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
15 * Copyright (c) 2013 Steven Hartland. All rights reserved.
16 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
17 */
18
19 #ifndef _SYS_DSL_DATASET_H
20 #define _SYS_DSL_DATASET_H
21
22 #include <sys/dmu.h>
23 #include <sys/spa.h>
24 #include <sys/txg.h>
25 #include <sys/zio.h>
26 #include <sys/bplist.h>
27 #include <sys/dsl_synctask.h>
28 #include <sys/zfs_context.h>
29 #include <sys/dsl_deadlist.h>
30 #include <sys/zfs_refcount.h>
31 #include <sys/rrwlock.h>
32 #include <sys/dsl_crypt.h>
33 #include <zfeature_common.h>
34
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38
39 struct dsl_dataset;
40 struct dsl_dir;
41 struct dsl_pool;
42 struct dsl_crypto_params;
43 struct dsl_key_mapping;
44 struct zfs_bookmark_phys;
45
46 #define DS_FLAG_INCONSISTENT (1ULL<<0)
47 #define DS_IS_INCONSISTENT(ds) \
48 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)
49
50 /*
51 * Do not allow this dataset to be promoted.
52 */
53 #define DS_FLAG_NOPROMOTE (1ULL<<1)
54
55 /*
56 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
57 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
58 * refquota/refreservations).
59 */
60 #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
61
62 /*
63 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
64 * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
65 */
66 #define DS_FLAG_DEFER_DESTROY (1ULL<<3)
67 #define DS_IS_DEFER_DESTROY(ds) \
68 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)
69
70 /*
71 * DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
72 * They should be of the format <reverse-dns>:<field>.
73 */
74
75 /*
76 * This field's value is the object ID of a zap object which contains the
77 * bookmarks of this dataset. If it is present, then this dataset is counted
78 * in the refcount of the SPA_FEATURES_BOOKMARKS feature.
79 */
80 #define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
81
82 /*
83 * This field is present (with value=0) if this dataset may contain large
84 * dnodes (>512B). If it is present, then this dataset is counted in the
85 * refcount of the SPA_FEATURE_LARGE_DNODE feature.
86 */
87 #define DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode"
88
89 /*
90 * These fields are set on datasets that are in the middle of a resumable
91 * receive, and allow the sender to resume the send if it is interrupted.
92 */
93 #define DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid"
94 #define DS_FIELD_RESUME_TONAME "com.delphix:resume_toname"
95 #define DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid"
96 #define DS_FIELD_RESUME_OBJECT "com.delphix:resume_object"
97 #define DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset"
98 #define DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes"
99 #define DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok"
100 #define DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok"
101 #define DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok"
102 #define DS_FIELD_RESUME_RAWOK "com.datto:resume_rawok"
103
104 /*
105 * This field is set to the object number of the remap deadlist if one exists.
106 */
107 #define DS_FIELD_REMAP_DEADLIST "com.delphix:remap_deadlist"
108
109 /*
110 * We were receiving an incremental from a redaction bookmark, and these are the
111 * guids of its snapshots.
112 */
113 #define DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS \
114 "com.delphix:resume_redact_book_snaps"
115
116 /*
117 * This field is set to the ivset guid for encrypted snapshots. This is used
118 * for validating raw receives.
119 */
120 #define DS_FIELD_IVSET_GUID "com.datto:ivset_guid"
121
122 /*
123 * This field, when present, marks a snapshot that was received raw. A later
124 * non-raw incremental receive onto such a snapshot re-stamps its ivset guid
125 * and so diverges it from the sending lineage, which makes any subsequent raw
126 * incremental fail with an IV set guid mismatch; the field lets the receive
127 * warn about that as it happens instead of only failing later (see #8758).
128 */
129 #define DS_FIELD_RAW_RECEIVED "org.openzfs:raw_received"
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
139 typedef 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
173 typedef 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
272 static inline dsl_dataset_phys_t *
dsl_dataset_phys(dsl_dataset_t * ds)273 dsl_dataset_phys(dsl_dataset_t *ds)
274 {
275 return ((dsl_dataset_phys_t *)ds->ds_dbuf->db_data);
276 }
277
278 typedef struct dsl_dataset_clone_arg_t {
279 const char *ddca_clone;
280 const char *ddca_origin;
281 cred_t *ddca_cred;
282 } dsl_dataset_clone_arg_t;
283
284 typedef struct dsl_dataset_promote_arg {
285 const char *ddpa_clonename;
286 dsl_dataset_t *ddpa_clone;
287 list_t shared_snaps, origin_snaps, clone_snaps;
288 dsl_dataset_t *origin_origin; /* origin of the origin */
289 uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap;
290 nvlist_t *err_ds;
291 cred_t *cr;
292 } dsl_dataset_promote_arg_t;
293
294 typedef struct dsl_dataset_rollback_arg {
295 const char *ddra_fsname;
296 const char *ddra_tosnap;
297 void *ddra_owner;
298 nvlist_t *ddra_result;
299 } dsl_dataset_rollback_arg_t;
300
301 typedef struct dsl_dataset_snapshot_arg {
302 nvlist_t *ddsa_snaps;
303 nvlist_t *ddsa_props;
304 nvlist_t *ddsa_errors;
305 cred_t *ddsa_cr;
306 } dsl_dataset_snapshot_arg_t;
307
308 typedef struct dsl_dataset_rename_snapshot_arg {
309 const char *ddrsa_fsname;
310 const char *ddrsa_oldsnapname;
311 const char *ddrsa_newsnapname;
312 boolean_t ddrsa_recursive;
313 dmu_tx_t *ddrsa_tx;
314 } dsl_dataset_rename_snapshot_arg_t;
315
316 /*
317 * The max length of a temporary tag prefix is the number of hex digits
318 * required to express UINT64_MAX plus one for the hyphen.
319 */
320 #define MAX_TAG_PREFIX_LEN 17
321
322 #define dsl_dataset_is_snapshot(ds) \
323 (dsl_dataset_phys(ds)->ds_num_children != 0)
324
325 #define DS_UNIQUE_IS_ACCURATE(ds) \
326 ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
327
328 /* flags for holding the dataset */
329 typedef enum ds_hold_flags {
330 DS_HOLD_FLAG_NONE = 0 << 0,
331 DS_HOLD_FLAG_DECRYPT = 1 << 0 /* needs access to encrypted data */
332 } ds_hold_flags_t;
333
334 int dsl_dataset_hold(struct dsl_pool *dp, const char *name, const void *tag,
335 dsl_dataset_t **dsp);
336 int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name,
337 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
338 boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
339 const void *tag);
340 int dsl_dataset_create_key_mapping(dsl_dataset_t *ds);
341 int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj,
342 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **);
343 void dsl_dataset_remove_key_mapping(dsl_dataset_t *ds);
344 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
345 const void *tag, dsl_dataset_t **);
346 void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
347 const void *tag);
348 void dsl_dataset_rele(dsl_dataset_t *ds, const void *tag);
349 int dsl_dataset_own(struct dsl_pool *dp, const char *name,
350 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
351 int dsl_dataset_own_force(struct dsl_pool *dp, const char *name,
352 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
353 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
354 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
355 int dsl_dataset_own_obj_force(struct dsl_pool *dp, uint64_t dsobj,
356 ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
357 void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags,
358 const void *tag);
359 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
360 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, const void *tag,
361 boolean_t override);
362 int dsl_dataset_namelen(dsl_dataset_t *ds);
363 boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
364 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
365 dsl_dataset_t *origin, uint64_t flags, cred_t *,
366 struct dsl_crypto_params *, dmu_tx_t *);
367 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
368 struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx);
369 void dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx);
370 int dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx);
371 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
372 void dsl_dataset_clone_sync(void *arg, dmu_tx_t *tx);
373 int dsl_dataset_clone_check(void *arg, dmu_tx_t *tx);
374 int dsl_dataset_clone(const char *clone, const char *origin);
375 void dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx);
376 int dsl_dataset_promote_check(void *arg, dmu_tx_t *tx);
377 int dsl_dataset_promote(const char *name, char *conflsnap);
378 int dsl_dataset_rename_snapshot(const char *fsname,
379 const char *oldsnapname, const char *newsnapname, boolean_t recursive);
380 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
381 minor_t cleanup_minor, const char *htag);
382
383 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
384
385 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
386
387 boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
388 dsl_dataset_t *snap);
389
390 void dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx);
391 void dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx);
392
393 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
394 dmu_tx_t *tx);
395 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
396 dmu_tx_t *tx, boolean_t async);
397 void dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev,
398 uint64_t offset, uint64_t size, uint64_t birth, dmu_tx_t *tx);
399 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
400 uint64_t *value);
401
402 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
403
404 int get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val);
405 char *get_receive_resume_token(dsl_dataset_t *ds);
406 uint64_t dsl_get_refratio(dsl_dataset_t *ds);
407 uint64_t dsl_get_logicalreferenced(dsl_dataset_t *ds);
408 uint64_t dsl_get_compressratio(dsl_dataset_t *ds);
409 uint64_t dsl_get_used(dsl_dataset_t *ds);
410 uint64_t dsl_get_creation(dsl_dataset_t *ds);
411 uint64_t dsl_get_creationtxg(dsl_dataset_t *ds);
412 uint64_t dsl_get_refquota(dsl_dataset_t *ds);
413 uint64_t dsl_get_refreservation(dsl_dataset_t *ds);
414 uint64_t dsl_get_guid(dsl_dataset_t *ds);
415 uint64_t dsl_get_unique(dsl_dataset_t *ds);
416 uint64_t dsl_get_objsetid(dsl_dataset_t *ds);
417 uint64_t dsl_get_userrefs(dsl_dataset_t *ds);
418 uint64_t dsl_get_defer_destroy(dsl_dataset_t *ds);
419 uint64_t dsl_get_referenced(dsl_dataset_t *ds);
420 uint64_t dsl_get_numclones(dsl_dataset_t *ds);
421 uint64_t dsl_get_inconsistent(dsl_dataset_t *ds);
422 uint64_t dsl_get_redacted(dsl_dataset_t *ds);
423 uint64_t dsl_get_available(dsl_dataset_t *ds);
424 int dsl_get_written(dsl_dataset_t *ds, uint64_t *written);
425 int dsl_get_prev_snap(dsl_dataset_t *ds, char *snap);
426 void dsl_get_redact_snaps(dsl_dataset_t *ds, nvlist_t *propval);
427 int dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value,
428 char *source);
429
430 void get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv);
431 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
432
433 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
434 void dsl_dataset_space(dsl_dataset_t *ds,
435 uint64_t *refdbytesp, uint64_t *availbytesp,
436 uint64_t *usedobjsp, uint64_t *availobjsp);
437 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
438 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *newds,
439 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
440 int dsl_dataset_space_written_bookmark(struct zfs_bookmark_phys *bmp,
441 dsl_dataset_t *newds, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
442 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
443 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
444
445 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
446
447 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
448 uint64_t asize, uint64_t inflight, uint64_t *used,
449 uint64_t *ref_rsrv);
450 int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
451 uint64_t quota);
452 int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
453 uint64_t reservation);
454 int dsl_dataset_set_compression(const char *dsname, zprop_source_t source,
455 uint64_t compression);
456
457 boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
458 uint64_t earlier_txg);
459 void dsl_dataset_long_hold(dsl_dataset_t *ds, const void *tag);
460 void dsl_dataset_long_rele(dsl_dataset_t *ds, const void *tag);
461 boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
462
463 int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
464 dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
465 void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
466 dsl_dataset_t *origin_head, dmu_tx_t *tx);
467 int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
468 dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr);
469 void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
470 uint64_t crtime, dmu_tx_t *tx);
471
472 void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
473 dmu_tx_t *tx);
474 void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
475 int dsl_dataset_get_snapname(dsl_dataset_t *ds);
476 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
477 uint64_t *value);
478 int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
479 boolean_t adj_cnt);
480 void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
481 zprop_source_t source, uint64_t value, dmu_tx_t *tx);
482 void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
483 boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds);
484 boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds);
485
486 int dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx);
487 void dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx);
488 int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner,
489 nvlist_t *result);
490
491 int dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx);
492 void dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx);
493
494 uint64_t dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds);
495 void dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx);
496 boolean_t dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds);
497 void dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx);
498
499 void dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, void *arg,
500 dmu_tx_t *tx);
501 void dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f,
502 dmu_tx_t *tx);
503 boolean_t dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f);
504 boolean_t dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds,
505 spa_feature_t f, uint64_t *outlength, uint64_t **outp);
506
507 void dsl_dataset_activate_redaction(dsl_dataset_t *ds, uint64_t *redact_snaps,
508 uint64_t num_redact_snaps, dmu_tx_t *tx);
509
510 int dsl_dataset_oldest_snapshot(spa_t *spa, uint64_t head_ds, uint64_t min_txg,
511 uint64_t *oldest_dsobj);
512
513 #ifdef ZFS_DEBUG
514 #define dprintf_ds(ds, fmt, ...) do { \
515 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
516 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
517 dsl_dataset_name(ds, __ds_name); \
518 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
519 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
520 } \
521 } while (0)
522 #else
523 #define dprintf_ds(dd, fmt, ...)
524 #endif
525
526 #ifdef __cplusplus
527 }
528 #endif
529
530 #endif /* _SYS_DSL_DATASET_H */
531