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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
24 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
25 * Copyright (c) 2013 Steven Hartland. All rights reserved.
26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
29 #ifndef _SYS_DSL_DATASET_H
30 #define _SYS_DSL_DATASET_H
36 #include <sys/bplist.h>
37 #include <sys/dsl_synctask.h>
38 #include <sys/zfs_context.h>
39 #include <sys/dsl_deadlist.h>
40 #include <sys/refcount.h>
41 #include <sys/rrwlock.h>
42 #include <sys/dsl_crypt.h>
43 #include <zfeature_common.h>
52 struct dsl_crypto_params;
54 #define DS_FLAG_INCONSISTENT (1ULL<<0)
55 #define DS_IS_INCONSISTENT(ds) \
56 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)
59 * Do not allow this dataset to be promoted.
61 #define DS_FLAG_NOPROMOTE (1ULL<<1)
64 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
65 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
66 * refquota/refreservations).
68 #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
71 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
72 * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
74 #define DS_FLAG_DEFER_DESTROY (1ULL<<3)
75 #define DS_IS_DEFER_DESTROY(ds) \
76 (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)
79 * DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
80 * They should be of the format <reverse-dns>:<field>.
84 * This field's value is the object ID of a zap object which contains the
85 * bookmarks of this dataset. If it is present, then this dataset is counted
86 * in the refcount of the SPA_FEATURES_BOOKMARKS feature.
88 #define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
91 * This field is present (with value=0) if this dataset may contain large
92 * dnodes (>512B). If it is present, then this dataset is counted in the
93 * refcount of the SPA_FEATURE_LARGE_DNODE feature.
95 #define DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode"
98 * These fields are set on datasets that are in the middle of a resumable
99 * receive, and allow the sender to resume the send if it is interrupted.
101 #define DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid"
102 #define DS_FIELD_RESUME_TONAME "com.delphix:resume_toname"
103 #define DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid"
104 #define DS_FIELD_RESUME_OBJECT "com.delphix:resume_object"
105 #define DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset"
106 #define DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes"
107 #define DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok"
108 #define DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok"
109 #define DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok"
110 #define DS_FIELD_RESUME_RAWOK "com.datto:resume_rawok"
113 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
114 * name lookups should be performed case-insensitively.
116 #define DS_FLAG_CI_DATASET (1ULL<<16)
118 #define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
120 typedef struct dsl_dataset_phys {
121 uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
122 uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
123 uint64_t ds_prev_snap_txg;
124 uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
125 uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
126 uint64_t ds_num_children; /* clone/snap children; ==0 for head */
127 uint64_t ds_creation_time; /* seconds since 1970 */
128 uint64_t ds_creation_txg;
129 uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
131 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
132 * include all blocks referenced by this dataset, including those
133 * shared with any other datasets.
135 uint64_t ds_referenced_bytes;
136 uint64_t ds_compressed_bytes;
137 uint64_t ds_uncompressed_bytes;
138 uint64_t ds_unique_bytes; /* only relevant to snapshots */
140 * The ds_fsid_guid is a 56-bit ID that can change to avoid
141 * collisions. The ds_guid is a 64-bit ID that will never
142 * change, so there is a small probability that it will collide.
144 uint64_t ds_fsid_guid;
146 uint64_t ds_flags; /* DS_FLAG_* */
148 uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
149 uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
150 uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
151 uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
152 } dsl_dataset_phys_t;
154 typedef struct dsl_dataset {
155 dmu_buf_user_t ds_dbu;
156 rrwlock_t ds_bp_rwlock; /* Protects ds_phys->ds_bp */
159 struct dsl_dir *ds_dir;
162 uint64_t ds_fsid_guid;
163 boolean_t ds_is_snapshot;
165 /* only used in syncing context, only valid for non-snapshots: */
166 struct dsl_dataset *ds_prev;
167 uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */
169 /* has internal locking: */
170 dsl_deadlist_t ds_deadlist;
171 bplist_t ds_pending_deadlist;
173 /* protected by lock on pool's dp_dirty_datasets list */
174 txg_node_t ds_dirty_link;
175 list_node_t ds_synced_link;
178 * ds_phys->ds_<accounting> is also protected by ds_lock.
179 * Protected by ds_lock:
183 uint64_t ds_userrefs;
187 * Long holds prevent the ds from being destroyed; they allow the
188 * ds to remain held even after dropping the dp_config_rwlock.
189 * Owning counts as a long hold. See the comments above
190 * dsl_pool_hold() for details.
192 refcount_t ds_longholds;
194 /* no locking; only for making guesses */
195 uint64_t ds_trysnap_txg;
197 /* for objset_open() */
198 kmutex_t ds_opening_lock;
200 uint64_t ds_reserved; /* cached refreservation */
201 uint64_t ds_quota; /* cached refquota */
203 kmutex_t ds_sendstream_lock;
204 list_t ds_sendstreams;
207 * When in the middle of a resumable receive, tracks how much
208 * progress we have made.
210 uint64_t ds_resume_object[TXG_SIZE];
211 uint64_t ds_resume_offset[TXG_SIZE];
212 uint64_t ds_resume_bytes[TXG_SIZE];
214 /* Protected by our dsl_dir's dd_lock */
218 * For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
221 uint8_t ds_feature_inuse[SPA_FEATURES];
224 * Set if we need to activate the feature on this dataset this txg
225 * (used only in syncing context).
227 uint8_t ds_feature_activation_needed[SPA_FEATURES];
229 /* Protected by ds_lock; keep at end of struct for better locality */
230 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN];
233 static inline dsl_dataset_phys_t *
234 dsl_dataset_phys(dsl_dataset_t *ds)
236 return (ds->ds_dbuf->db_data);
240 * The max length of a temporary tag prefix is the number of hex digits
241 * required to express UINT64_MAX plus one for the hyphen.
243 #define MAX_TAG_PREFIX_LEN 17
245 #define dsl_dataset_is_snapshot(ds) \
246 (dsl_dataset_phys(ds)->ds_num_children != 0)
248 #define DS_UNIQUE_IS_ACCURATE(ds) \
249 ((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
251 /* flags for holding the dataset */
252 typedef enum ds_hold_flags {
253 DS_HOLD_FLAG_DECRYPT = 1 << 0 /* needs access to encrypted data */
256 int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
257 dsl_dataset_t **dsp);
258 int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name,
259 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
260 boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
262 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
264 int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj,
265 ds_hold_flags_t flags, void *tag, dsl_dataset_t **);
266 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
267 void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
269 int dsl_dataset_own(struct dsl_pool *dp, const char *name,
270 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
271 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
272 ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
273 void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag);
274 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
275 int dsl_dataset_namelen(dsl_dataset_t *ds);
276 boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
277 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
278 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
279 dsl_dataset_t *origin, uint64_t flags, cred_t *,
280 struct dsl_crypto_params *, dmu_tx_t *);
281 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
282 struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx);
283 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
284 int dsl_dataset_promote(const char *name, char *conflsnap);
285 int dsl_dataset_rename_snapshot(const char *fsname,
286 const char *oldsnapname, const char *newsnapname, boolean_t recursive);
287 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
288 minor_t cleanup_minor, const char *htag);
290 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
292 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
294 boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
295 dsl_dataset_t *snap);
297 void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);
298 void dsl_dataset_sync_done(dsl_dataset_t *os, dmu_tx_t *tx);
300 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
302 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
303 dmu_tx_t *tx, boolean_t async);
304 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
307 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
308 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
309 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
310 void dsl_dataset_space(dsl_dataset_t *ds,
311 uint64_t *refdbytesp, uint64_t *availbytesp,
312 uint64_t *usedobjsp, uint64_t *availobjsp);
313 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
314 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
315 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
316 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
317 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
318 boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
320 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
322 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
323 uint64_t asize, uint64_t inflight, uint64_t *used,
325 int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
327 int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
328 uint64_t reservation);
330 boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
331 uint64_t earlier_txg);
332 void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
333 void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
334 boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
336 int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
337 dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
338 void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
339 dsl_dataset_t *origin_head, dmu_tx_t *tx);
340 int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
341 dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr);
342 void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
345 void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
347 void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
348 int dsl_dataset_get_snapname(dsl_dataset_t *ds);
349 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
351 int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
353 void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
354 zprop_source_t source, uint64_t value, dmu_tx_t *tx);
355 void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
356 boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds);
357 boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds);
358 int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner,
361 void dsl_dataset_activate_feature(uint64_t dsobj,
362 spa_feature_t f, dmu_tx_t *tx);
363 void dsl_dataset_deactivate_feature(uint64_t dsobj,
364 spa_feature_t f, dmu_tx_t *tx);
367 #define dprintf_ds(ds, fmt, ...) do { \
368 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
369 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
370 dsl_dataset_name(ds, __ds_name); \
371 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
372 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
374 _NOTE(CONSTCOND) } while (0)
376 #define dprintf_ds(dd, fmt, ...)
383 #endif /* _SYS_DSL_DATASET_H */