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--- old/usr/src/uts/common/fs/zfs/sys/dsl_dataset.h
+++ new/usr/src/uts/common/fs/zfs/sys/dsl_dataset.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 24 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
25 25 */
26 26
27 27 #ifndef _SYS_DSL_DATASET_H
28 28 #define _SYS_DSL_DATASET_H
29 29
30 30 #include <sys/dmu.h>
31 31 #include <sys/spa.h>
32 32 #include <sys/txg.h>
33 33 #include <sys/zio.h>
34 34 #include <sys/bplist.h>
35 35 #include <sys/dsl_synctask.h>
36 36 #include <sys/zfs_context.h>
37 37 #include <sys/dsl_deadlist.h>
38 38
39 39 #ifdef __cplusplus
40 40 extern "C" {
41 41 #endif
42 42
43 43 struct dsl_dataset;
44 44 struct dsl_dir;
45 45 struct dsl_pool;
46 46
47 47 #define DS_FLAG_INCONSISTENT (1ULL<<0)
48 48 #define DS_IS_INCONSISTENT(ds) \
49 49 ((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT)
50 50 /*
51 51 * NB: nopromote can not yet be set, but we want support for it in this
52 52 * on-disk version, so that we don't need to upgrade for it later. It
53 53 * will be needed when we implement 'zfs split' (where the split off
54 54 * clone should not be promoted).
55 55 */
56 56 #define DS_FLAG_NOPROMOTE (1ULL<<1)
57 57
58 58 /*
59 59 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
60 60 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
61 61 * refquota/refreservations).
62 62 */
63 63 #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
64 64
65 65 /*
66 66 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
67 67 * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
68 68 */
69 69 #define DS_FLAG_DEFER_DESTROY (1ULL<<3)
70 70 #define DS_IS_DEFER_DESTROY(ds) \
71 71 ((ds)->ds_phys->ds_flags & DS_FLAG_DEFER_DESTROY)
72 72
73 73 /*
74 74 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
75 75 * name lookups should be performed case-insensitively.
76 76 */
77 77 #define DS_FLAG_CI_DATASET (1ULL<<16)
78 78
79 79 typedef struct dsl_dataset_phys {
80 80 uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
81 81 uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
82 82 uint64_t ds_prev_snap_txg;
83 83 uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
84 84 uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
85 85 uint64_t ds_num_children; /* clone/snap children; ==0 for head */
86 86 uint64_t ds_creation_time; /* seconds since 1970 */
87 87 uint64_t ds_creation_txg;
88 88 uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
89 89 /*
90 90 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
91 91 * include all blocks referenced by this dataset, including those
92 92 * shared with any other datasets.
93 93 */
94 94 uint64_t ds_referenced_bytes;
95 95 uint64_t ds_compressed_bytes;
96 96 uint64_t ds_uncompressed_bytes;
97 97 uint64_t ds_unique_bytes; /* only relevant to snapshots */
98 98 /*
99 99 * The ds_fsid_guid is a 56-bit ID that can change to avoid
100 100 * collisions. The ds_guid is a 64-bit ID that will never
101 101 * change, so there is a small probability that it will collide.
102 102 */
103 103 uint64_t ds_fsid_guid;
104 104 uint64_t ds_guid;
105 105 uint64_t ds_flags; /* DS_FLAG_* */
106 106 blkptr_t ds_bp;
107 107 uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
108 108 uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
109 109 uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
110 110 uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
111 111 } dsl_dataset_phys_t;
112 112
113 113 typedef struct dsl_dataset {
114 114 /* Immutable: */
115 115 struct dsl_dir *ds_dir;
116 116 dsl_dataset_phys_t *ds_phys;
117 117 dmu_buf_t *ds_dbuf;
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118 118 uint64_t ds_object;
119 119 uint64_t ds_fsid_guid;
120 120
121 121 /* only used in syncing context, only valid for non-snapshots: */
122 122 struct dsl_dataset *ds_prev;
123 123
124 124 /* has internal locking: */
125 125 dsl_deadlist_t ds_deadlist;
126 126 bplist_t ds_pending_deadlist;
127 127
128 - /* to protect against multiple concurrent incremental recv */
129 - kmutex_t ds_recvlock;
130 -
131 128 /* protected by lock on pool's dp_dirty_datasets list */
132 129 txg_node_t ds_dirty_link;
133 130 list_node_t ds_synced_link;
134 131
135 132 /*
136 133 * ds_phys->ds_<accounting> is also protected by ds_lock.
137 134 * Protected by ds_lock:
138 135 */
139 136 kmutex_t ds_lock;
140 137 objset_t *ds_objset;
141 138 uint64_t ds_userrefs;
142 139
143 140 /*
144 141 * ds_owner is protected by the ds_rwlock and the ds_lock
145 142 */
146 143 krwlock_t ds_rwlock;
147 144 kcondvar_t ds_exclusive_cv;
148 145 void *ds_owner;
149 146
150 147 /* no locking; only for making guesses */
151 148 uint64_t ds_trysnap_txg;
152 149
153 150 /* for objset_open() */
154 151 kmutex_t ds_opening_lock;
155 152
156 153 uint64_t ds_reserved; /* cached refreservation */
157 154 uint64_t ds_quota; /* cached refquota */
158 155
159 156 kmutex_t ds_sendstream_lock;
160 157 list_t ds_sendstreams;
161 158
162 159 /* Protected by ds_lock; keep at end of struct for better locality */
163 160 char ds_snapname[MAXNAMELEN];
164 161 } dsl_dataset_t;
165 162
166 163 struct dsl_ds_destroyarg {
167 164 dsl_dataset_t *ds; /* ds to destroy */
168 165 dsl_dataset_t *rm_origin; /* also remove our origin? */
169 166 boolean_t is_origin_rm; /* set if removing origin snap */
170 167 boolean_t defer; /* destroy -d requested? */
171 168 boolean_t releasing; /* destroying due to release? */
172 169 boolean_t need_prep; /* do we need to retry due to EBUSY? */
173 170 };
174 171
175 172 /*
176 173 * The max length of a temporary tag prefix is the number of hex digits
177 174 * required to express UINT64_MAX plus one for the hyphen.
178 175 */
179 176 #define MAX_TAG_PREFIX_LEN 17
180 177
181 178 struct dsl_ds_holdarg {
182 179 dsl_sync_task_group_t *dstg;
183 180 char *htag;
184 181 char *snapname;
185 182 boolean_t recursive;
186 183 boolean_t gotone;
187 184 boolean_t temphold;
188 185 char failed[MAXPATHLEN];
189 186 };
190 187
191 188 #define dsl_dataset_is_snapshot(ds) \
192 189 ((ds)->ds_phys->ds_num_children != 0)
193 190
194 191 #define DS_UNIQUE_IS_ACCURATE(ds) \
195 192 (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
196 193
197 194 int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp);
198 195 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
199 196 void *tag, dsl_dataset_t **);
200 197 int dsl_dataset_own(const char *name, boolean_t inconsistentok,
201 198 void *tag, dsl_dataset_t **dsp);
202 199 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
203 200 boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp);
204 201 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
205 202 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
206 203 void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
207 204 void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag);
208 205 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok,
209 206 void *tag);
210 207 void dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *tag);
211 208 void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
212 209 minor_t minor);
213 210 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
214 211 dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
215 212 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
216 213 uint64_t flags, dmu_tx_t *tx);
217 214 int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
218 215 int dsl_snapshots_destroy(char *fsname, char *snapname, boolean_t defer);
219 216 dsl_checkfunc_t dsl_dataset_destroy_check;
220 217 dsl_syncfunc_t dsl_dataset_destroy_sync;
221 218 dsl_checkfunc_t dsl_dataset_snapshot_check;
222 219 dsl_syncfunc_t dsl_dataset_snapshot_sync;
223 220 dsl_syncfunc_t dsl_dataset_user_hold_sync;
224 221 int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
225 222 int dsl_dataset_promote(const char *name, char *conflsnap);
226 223 int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
227 224 boolean_t force);
228 225 int dsl_dataset_user_hold(char *dsname, char *snapname, char *htag,
229 226 boolean_t recursive, boolean_t temphold, int cleanup_fd);
230 227 int dsl_dataset_user_hold_for_send(dsl_dataset_t *ds, char *htag,
231 228 boolean_t temphold);
232 229 int dsl_dataset_user_release(char *dsname, char *snapname, char *htag,
233 230 boolean_t recursive);
234 231 int dsl_dataset_user_release_tmp(struct dsl_pool *dp, uint64_t dsobj,
235 232 char *htag, boolean_t retry);
236 233 int dsl_dataset_get_holds(const char *dsname, nvlist_t **nvp);
237 234
238 235 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
239 236 void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);
240 237
241 238 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
242 239
243 240 boolean_t dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds);
244 241
245 242 void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);
246 243
247 244 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
248 245 dmu_tx_t *tx);
249 246 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
250 247 dmu_tx_t *tx, boolean_t async);
251 248 boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
252 249 uint64_t blk_birth);
253 250 uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
254 251
255 252 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
256 253 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
257 254 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
258 255 void dsl_dataset_space(dsl_dataset_t *ds,
259 256 uint64_t *refdbytesp, uint64_t *availbytesp,
260 257 uint64_t *usedobjsp, uint64_t *availobjsp);
261 258 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
262 259 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
263 260 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
264 261 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
265 262 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
266 263
267 264 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
268 265
269 266 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
270 267 uint64_t asize, uint64_t inflight, uint64_t *used,
271 268 uint64_t *ref_rsrv);
272 269 int dsl_dataset_set_quota(const char *dsname, zprop_source_t source,
273 270 uint64_t quota);
274 271 dsl_syncfunc_t dsl_dataset_set_quota_sync;
275 272 int dsl_dataset_set_reservation(const char *dsname, zprop_source_t source,
276 273 uint64_t reservation);
277 274
278 275 int dsl_destroy_inconsistent(const char *dsname, void *arg);
279 276
280 277 #ifdef ZFS_DEBUG
281 278 #define dprintf_ds(ds, fmt, ...) do { \
282 279 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
283 280 char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
284 281 dsl_dataset_name(ds, __ds_name); \
285 282 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
286 283 kmem_free(__ds_name, MAXNAMELEN); \
287 284 } \
288 285 _NOTE(CONSTCOND) } while (0)
289 286 #else
290 287 #define dprintf_ds(dd, fmt, ...)
291 288 #endif
292 289
293 290 #ifdef __cplusplus
294 291 }
295 292 #endif
296 293
297 294 #endif /* _SYS_DSL_DATASET_H */
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