Print this page
3752 want more verifiable dbuf user eviction
Submitted by: Justin Gibbs <justing@spectralogic.com>
Submitted by: Will Andrews <willa@spectralogic.com>
| Split |
Close |
| Expand all |
| Collapse all |
--- 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>
|
↓ open down ↓ |
37 lines elided |
↑ open up ↑ |
38 38 #include <sys/refcount.h>
39 39
40 40 #ifdef __cplusplus
41 41 extern "C" {
42 42 #endif
43 43
44 44 struct dsl_dataset;
45 45 struct dsl_dir;
46 46 struct dsl_pool;
47 47
48 +#define DS_HAS_PHYS(ds) \
49 + ((ds)->ds_dbuf != NULL && (ds)->ds_dbuf->db_data != NULL)
50 +
48 51 #define DS_FLAG_INCONSISTENT (1ULL<<0)
49 52 #define DS_IS_INCONSISTENT(ds) \
50 53 ((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT)
51 54 /*
52 55 * Note: nopromote can not yet be set, but we want support for it in this
53 56 * on-disk version, so that we don't need to upgrade for it later.
54 57 */
55 58 #define DS_FLAG_NOPROMOTE (1ULL<<1)
56 59
57 60 /*
58 61 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
59 62 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
60 63 * refquota/refreservations).
61 64 */
62 65 #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
63 66
64 67 /*
65 68 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
66 69 * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
67 70 */
68 71 #define DS_FLAG_DEFER_DESTROY (1ULL<<3)
69 72 #define DS_IS_DEFER_DESTROY(ds) \
70 73 ((ds)->ds_phys->ds_flags & DS_FLAG_DEFER_DESTROY)
71 74
72 75 /*
73 76 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
74 77 * name lookups should be performed case-insensitively.
75 78 */
76 79 #define DS_FLAG_CI_DATASET (1ULL<<16)
77 80
78 81 #define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
79 82
80 83 typedef struct dsl_dataset_phys {
81 84 uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
82 85 uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
83 86 uint64_t ds_prev_snap_txg;
84 87 uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
85 88 uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
86 89 uint64_t ds_num_children; /* clone/snap children; ==0 for head */
87 90 uint64_t ds_creation_time; /* seconds since 1970 */
88 91 uint64_t ds_creation_txg;
89 92 uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
90 93 /*
91 94 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
92 95 * include all blocks referenced by this dataset, including those
93 96 * shared with any other datasets.
94 97 */
95 98 uint64_t ds_referenced_bytes;
96 99 uint64_t ds_compressed_bytes;
97 100 uint64_t ds_uncompressed_bytes;
98 101 uint64_t ds_unique_bytes; /* only relevant to snapshots */
99 102 /*
100 103 * The ds_fsid_guid is a 56-bit ID that can change to avoid
101 104 * collisions. The ds_guid is a 64-bit ID that will never
102 105 * change, so there is a small probability that it will collide.
103 106 */
|
↓ open down ↓ |
46 lines elided |
↑ open up ↑ |
104 107 uint64_t ds_fsid_guid;
105 108 uint64_t ds_guid;
106 109 uint64_t ds_flags; /* DS_FLAG_* */
107 110 blkptr_t ds_bp;
108 111 uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
109 112 uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
110 113 uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
111 114 uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
112 115 } dsl_dataset_phys_t;
113 116
117 +typedef struct dsl_dataset_dbuf {
118 + uint8_t dsdb_pad[offsetof(dmu_buf_t, db_data)];
119 + dsl_dataset_phys_t *dsdb_data;
120 +} dsl_dataset_dbuf_t;
121 +
114 122 typedef struct dsl_dataset {
123 + dmu_buf_user_t db_evict;
124 +
115 125 /* Immutable: */
116 126 struct dsl_dir *ds_dir;
117 - dsl_dataset_phys_t *ds_phys;
118 - dmu_buf_t *ds_dbuf;
127 + union {
128 + dmu_buf_t *ds_dmu_db;
129 + dsl_dataset_dbuf_t *ds_db;
130 + } ds_db_u;
119 131 uint64_t ds_object;
120 132 uint64_t ds_fsid_guid;
121 133
122 134 /* only used in syncing context, only valid for non-snapshots: */
123 135 struct dsl_dataset *ds_prev;
124 136
125 137 /* has internal locking: */
126 138 dsl_deadlist_t ds_deadlist;
127 139 bplist_t ds_pending_deadlist;
128 140
129 141 /* protected by lock on pool's dp_dirty_datasets list */
130 142 txg_node_t ds_dirty_link;
131 143 list_node_t ds_synced_link;
132 144
133 145 /*
134 146 * ds_phys->ds_<accounting> is also protected by ds_lock.
135 147 * Protected by ds_lock:
136 148 */
137 149 kmutex_t ds_lock;
138 150 objset_t *ds_objset;
139 151 uint64_t ds_userrefs;
140 152 void *ds_owner;
141 153
142 154 /*
143 155 * Long holds prevent the ds from being destroyed; they allow the
144 156 * ds to remain held even after dropping the dp_config_rwlock.
145 157 * Owning counts as a long hold. See the comments above
146 158 * dsl_pool_hold() for details.
147 159 */
148 160 refcount_t ds_longholds;
149 161
150 162 /* no locking; only for making guesses */
151 163 uint64_t ds_trysnap_txg;
152 164
153 165 /* for objset_open() */
154 166 kmutex_t ds_opening_lock;
155 167
|
↓ open down ↓ |
27 lines elided |
↑ open up ↑ |
156 168 uint64_t ds_reserved; /* cached refreservation */
157 169 uint64_t ds_quota; /* cached refquota */
158 170
159 171 kmutex_t ds_sendstream_lock;
160 172 list_t ds_sendstreams;
161 173
162 174 /* Protected by ds_lock; keep at end of struct for better locality */
163 175 char ds_snapname[MAXNAMELEN];
164 176 } dsl_dataset_t;
165 177
178 +/* See sys/dmu.h:dmu_buf_user_t for why we have these. */
179 +#define ds_dbuf ds_db_u.ds_dmu_db
180 +#define ds_phys ds_db_u.ds_db->dsdb_data
181 +
182 +struct dsl_ds_destroyarg {
183 + dsl_dataset_t *ds; /* ds to destroy */
184 + dsl_dataset_t *rm_origin; /* also remove our origin? */
185 + boolean_t is_origin_rm; /* set if removing origin snap */
186 + boolean_t defer; /* destroy -d requested? */
187 + boolean_t releasing; /* destroying due to release? */
188 + boolean_t need_prep; /* do we need to retry due to EBUSY? */
189 +};
190 +
166 191 /*
167 192 * The max length of a temporary tag prefix is the number of hex digits
168 193 * required to express UINT64_MAX plus one for the hyphen.
169 194 */
170 195 #define MAX_TAG_PREFIX_LEN 17
171 196
172 197 #define dsl_dataset_is_snapshot(ds) \
173 198 ((ds)->ds_phys->ds_num_children != 0)
174 199
175 200 #define DS_UNIQUE_IS_ACCURATE(ds) \
176 201 (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
177 202
178 203 int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
179 204 dsl_dataset_t **dsp);
180 205 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
181 206 dsl_dataset_t **);
182 207 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
183 208 int dsl_dataset_own(struct dsl_pool *dp, const char *name,
184 209 void *tag, dsl_dataset_t **dsp);
185 210 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
186 211 void *tag, dsl_dataset_t **dsp);
187 212 void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
188 213 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
189 214 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
190 215 void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
191 216 minor_t minor);
192 217 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
193 218 dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
194 219 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
195 220 uint64_t flags, dmu_tx_t *tx);
196 221 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
197 222 int dsl_dataset_promote(const char *name, char *conflsnap);
198 223 int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
199 224 boolean_t force);
200 225 int dsl_dataset_rename_snapshot(const char *fsname,
201 226 const char *oldsnapname, const char *newsnapname, boolean_t recursive);
202 227 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
203 228 minor_t cleanup_minor, const char *htag);
204 229
205 230 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
206 231 void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);
207 232
208 233 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
209 234
210 235 boolean_t dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds);
211 236
212 237 void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);
213 238
214 239 void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
215 240 dmu_tx_t *tx);
216 241 int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
217 242 dmu_tx_t *tx, boolean_t async);
218 243 boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
219 244 uint64_t blk_birth);
220 245 uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
221 246
222 247 void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
223 248 void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
224 249 void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
225 250 void dsl_dataset_space(dsl_dataset_t *ds,
226 251 uint64_t *refdbytesp, uint64_t *availbytesp,
227 252 uint64_t *usedobjsp, uint64_t *availobjsp);
228 253 uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
229 254 int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
230 255 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
231 256 int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
232 257 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
233 258 boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
234 259
235 260 int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
236 261
237 262 int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
238 263 uint64_t asize, uint64_t inflight, uint64_t *used,
239 264 uint64_t *ref_rsrv);
240 265 int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
241 266 uint64_t quota);
242 267 int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
243 268 uint64_t reservation);
244 269
245 270 boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier);
246 271 void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
247 272 void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
248 273 boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
249 274
250 275 int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
251 276 dsl_dataset_t *origin_head, boolean_t force);
252 277 void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
253 278 dsl_dataset_t *origin_head, dmu_tx_t *tx);
254 279 int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
255 280 dmu_tx_t *tx);
256 281 void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
257 282 dmu_tx_t *tx);
258 283
259 284 void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
260 285 dmu_tx_t *tx);
261 286 void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
262 287 int dsl_dataset_get_snapname(dsl_dataset_t *ds);
263 288 int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
264 289 uint64_t *value);
265 290 int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx);
266 291 void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
267 292 zprop_source_t source, uint64_t value, dmu_tx_t *tx);
268 293 int dsl_dataset_rollback(const char *fsname);
269 294
270 295 #ifdef ZFS_DEBUG
271 296 #define dprintf_ds(ds, fmt, ...) do { \
272 297 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
273 298 char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
274 299 dsl_dataset_name(ds, __ds_name); \
275 300 dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
276 301 kmem_free(__ds_name, MAXNAMELEN); \
277 302 } \
278 303 _NOTE(CONSTCOND) } while (0)
279 304 #else
280 305 #define dprintf_ds(dd, fmt, ...)
281 306 #endif
282 307
283 308 #ifdef __cplusplus
284 309 }
285 310 #endif
286 311
287 312 #endif /* _SYS_DSL_DATASET_H */
|
↓ open down ↓ |
112 lines elided |
↑ open up ↑ |
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX