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4171 clean up spa_feature_*() interfaces
4172 implement extensible_dataset feature for use by other zpool features
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
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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) 2013 by Delphix. All rights reserved.
24 24 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
25 25 * Copyright (c) 2013 Steven Hartland. All rights reserved.
26 26 */
27 27
28 28 #ifndef _SYS_DSL_DATASET_H
29 29 #define _SYS_DSL_DATASET_H
30 30
31 31 #include <sys/dmu.h>
32 32 #include <sys/spa.h>
33 33 #include <sys/txg.h>
34 34 #include <sys/zio.h>
35 35 #include <sys/bplist.h>
36 36 #include <sys/dsl_synctask.h>
37 37 #include <sys/zfs_context.h>
38 38 #include <sys/dsl_deadlist.h>
39 39 #include <sys/refcount.h>
40 40
41 41 #ifdef __cplusplus
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42 42 extern "C" {
43 43 #endif
44 44
45 45 struct dsl_dataset;
46 46 struct dsl_dir;
47 47 struct dsl_pool;
48 48
49 49 #define DS_FLAG_INCONSISTENT (1ULL<<0)
50 50 #define DS_IS_INCONSISTENT(ds) \
51 51 ((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT)
52 +
52 53 /*
53 - * Note: nopromote can not yet be set, but we want support for it in this
54 - * on-disk version, so that we don't need to upgrade for it later.
54 + * Do not allow this dataset to 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 + * DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
75 + * They should be of the format <reverse-dns>:<field>.
76 + */
77 +
78 +/*
74 79 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
75 80 * name lookups should be performed case-insensitively.
76 81 */
77 82 #define DS_FLAG_CI_DATASET (1ULL<<16)
78 83
79 84 #define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
80 85
81 86 typedef struct dsl_dataset_phys {
82 87 uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
83 88 uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
84 89 uint64_t ds_prev_snap_txg;
85 90 uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
86 91 uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
87 92 uint64_t ds_num_children; /* clone/snap children; ==0 for head */
88 93 uint64_t ds_creation_time; /* seconds since 1970 */
89 94 uint64_t ds_creation_txg;
90 95 uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
91 96 /*
92 97 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
93 98 * include all blocks referenced by this dataset, including those
94 99 * shared with any other datasets.
95 100 */
96 101 uint64_t ds_referenced_bytes;
97 102 uint64_t ds_compressed_bytes;
98 103 uint64_t ds_uncompressed_bytes;
99 104 uint64_t ds_unique_bytes; /* only relevant to snapshots */
100 105 /*
101 106 * The ds_fsid_guid is a 56-bit ID that can change to avoid
102 107 * collisions. The ds_guid is a 64-bit ID that will never
103 108 * change, so there is a small probability that it will collide.
104 109 */
105 110 uint64_t ds_fsid_guid;
106 111 uint64_t ds_guid;
107 112 uint64_t ds_flags; /* DS_FLAG_* */
108 113 blkptr_t ds_bp;
109 114 uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
110 115 uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
111 116 uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
112 117 uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
113 118 } dsl_dataset_phys_t;
114 119
115 120 typedef struct dsl_dataset {
116 121 /* Immutable: */
117 122 struct dsl_dir *ds_dir;
118 123 dsl_dataset_phys_t *ds_phys;
119 124 dmu_buf_t *ds_dbuf;
120 125 uint64_t ds_object;
121 126 uint64_t ds_fsid_guid;
122 127
123 128 /* only used in syncing context, only valid for non-snapshots: */
124 129 struct dsl_dataset *ds_prev;
125 130
126 131 /* has internal locking: */
127 132 dsl_deadlist_t ds_deadlist;
128 133 bplist_t ds_pending_deadlist;
129 134
130 135 /* protected by lock on pool's dp_dirty_datasets list */
131 136 txg_node_t ds_dirty_link;
132 137 list_node_t ds_synced_link;
133 138
134 139 /*
135 140 * ds_phys->ds_<accounting> is also protected by ds_lock.
136 141 * Protected by ds_lock:
137 142 */
138 143 kmutex_t ds_lock;
139 144 objset_t *ds_objset;
140 145 uint64_t ds_userrefs;
141 146 void *ds_owner;
142 147
143 148 /*
144 149 * Long holds prevent the ds from being destroyed; they allow the
145 150 * ds to remain held even after dropping the dp_config_rwlock.
146 151 * Owning counts as a long hold. See the comments above
147 152 * dsl_pool_hold() for details.
148 153 */
149 154 refcount_t ds_longholds;
150 155
151 156 /* no locking; only for making guesses */
152 157 uint64_t ds_trysnap_txg;
153 158
154 159 /* for objset_open() */
155 160 kmutex_t ds_opening_lock;
156 161
157 162 uint64_t ds_reserved; /* cached refreservation */
158 163 uint64_t ds_quota; /* cached refquota */
159 164
160 165 kmutex_t ds_sendstream_lock;
161 166 list_t ds_sendstreams;
162 167
163 168 /* Protected by ds_lock; keep at end of struct for better locality */
164 169 char ds_snapname[MAXNAMELEN];
165 170 } dsl_dataset_t;
166 171
167 172 /*
168 173 * The max length of a temporary tag prefix is the number of hex digits
169 174 * required to express UINT64_MAX plus one for the hyphen.
170 175 */
171 176 #define MAX_TAG_PREFIX_LEN 17
172 177
173 178 #define dsl_dataset_is_snapshot(ds) \
174 179 ((ds)->ds_phys->ds_num_children != 0)
175 180
176 181 #define DS_UNIQUE_IS_ACCURATE(ds) \
177 182 (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
178 183
179 184 int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
180 185 dsl_dataset_t **dsp);
181 186 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
182 187 dsl_dataset_t **);
183 188 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
184 189 int dsl_dataset_own(struct dsl_pool *dp, const char *name,
185 190 void *tag, dsl_dataset_t **dsp);
186 191 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
187 192 void *tag, dsl_dataset_t **dsp);
188 193 void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
189 194 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
190 195 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
191 196 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
192 197 dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
193 198 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
194 199 uint64_t flags, dmu_tx_t *tx);
195 200 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
196 201 int dsl_dataset_promote(const char *name, char *conflsnap);
197 202 int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
198 203 boolean_t force);
199 204 int dsl_dataset_rename_snapshot(const char *fsname,
200 205 const char *oldsnapname, const char *newsnapname, boolean_t recursive);
201 206 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
202 207 minor_t cleanup_minor, const char *htag);
203 208
204 209 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
205 210 void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);
206 211
207 212 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
208 213
209 214 boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
210 215 dsl_dataset_t *snap);
211 216
212 217 void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);
213 218
214 219 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
215 220 dmu_tx_t *tx);
216 221 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
217 222 dmu_tx_t *tx, boolean_t async);
218 223 boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
219 224 uint64_t blk_birth);
220 225 uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
221 226
222 227 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
223 228 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
224 229 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
225 230 void dsl_dataset_space(dsl_dataset_t *ds,
226 231 uint64_t *refdbytesp, uint64_t *availbytesp,
227 232 uint64_t *usedobjsp, uint64_t *availobjsp);
228 233 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
229 234 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
230 235 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
231 236 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
232 237 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
233 238 boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
234 239
235 240 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
236 241
237 242 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
238 243 uint64_t asize, uint64_t inflight, uint64_t *used,
239 244 uint64_t *ref_rsrv);
240 245 int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
241 246 uint64_t quota);
242 247 int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
243 248 uint64_t reservation);
244 249
245 250 boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier);
246 251 void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
247 252 void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
248 253 boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
249 254
250 255 int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
251 256 dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
252 257 void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
253 258 dsl_dataset_t *origin_head, dmu_tx_t *tx);
254 259 int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
255 260 dmu_tx_t *tx, boolean_t recv);
256 261 void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
257 262 dmu_tx_t *tx);
258 263
259 264 void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
260 265 dmu_tx_t *tx);
261 266 void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
262 267 int dsl_dataset_get_snapname(dsl_dataset_t *ds);
263 268 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
264 269 uint64_t *value);
265 270 int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx);
266 271 void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
267 272 zprop_source_t source, uint64_t value, dmu_tx_t *tx);
268 273 int dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result);
269 274
270 275 #ifdef ZFS_DEBUG
271 276 #define dprintf_ds(ds, fmt, ...) do { \
272 277 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
273 278 char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
274 279 dsl_dataset_name(ds, __ds_name); \
275 280 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
276 281 kmem_free(__ds_name, MAXNAMELEN); \
277 282 } \
278 283 _NOTE(CONSTCOND) } while (0)
279 284 #else
280 285 #define dprintf_ds(dd, fmt, ...)
281 286 #endif
282 287
283 288 #ifdef __cplusplus
284 289 }
285 290 #endif
286 291
287 292 #endif /* _SYS_DSL_DATASET_H */
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