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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/dmu_impl.h
+++ new/usr/src/uts/common/fs/zfs/sys/dmu_impl.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 2010 Sun Microsystems, Inc. All rights reserved.
23 23 * Use is subject to license terms.
24 24 */
25 25 /*
26 26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 27 * Copyright (c) 2013 by Delphix. All rights reserved.
28 28 */
29 29
30 30 #ifndef _SYS_DMU_IMPL_H
31 31 #define _SYS_DMU_IMPL_H
32 32
33 33 #include <sys/txg_impl.h>
34 34 #include <sys/zio.h>
35 35 #include <sys/dnode.h>
36 36 #include <sys/zfs_context.h>
37 37 #include <sys/zfs_ioctl.h>
38 38
39 39 #ifdef __cplusplus
40 40 extern "C" {
41 41 #endif
42 42
43 43 /*
44 44 * This is the locking strategy for the DMU. Numbers in parenthesis are
45 45 * cases that use that lock order, referenced below:
46 46 *
47 47 * ARC is self-contained
48 48 * bplist is self-contained
49 49 * refcount is self-contained
50 50 * txg is self-contained (hopefully!)
51 51 * zst_lock
52 52 * zf_rwlock
53 53 *
54 54 * XXX try to improve evicting path?
55 55 *
56 56 * dp_config_rwlock > os_obj_lock > dn_struct_rwlock >
57 57 * dn_dbufs_mtx > hash_mutexes > db_mtx > dd_lock > leafs
58 58 *
59 59 * dp_config_rwlock
60 60 * must be held before: everything
61 61 * protects dd namespace changes
62 62 * protects property changes globally
63 63 * held from:
64 64 * dsl_dir_open/r:
65 65 * dsl_dir_create_sync/w:
66 66 * dsl_dir_sync_destroy/w:
67 67 * dsl_dir_rename_sync/w:
68 68 * dsl_prop_changed_notify/r:
69 69 *
70 70 * os_obj_lock
71 71 * must be held before:
72 72 * everything except dp_config_rwlock
73 73 * protects os_obj_next
74 74 * held from:
75 75 * dmu_object_alloc: dn_dbufs_mtx, db_mtx, hash_mutexes, dn_struct_rwlock
76 76 *
77 77 * dn_struct_rwlock
78 78 * must be held before:
79 79 * everything except dp_config_rwlock and os_obj_lock
80 80 * protects structure of dnode (eg. nlevels)
81 81 * db_blkptr can change when syncing out change to nlevels
82 82 * dn_maxblkid
83 83 * dn_nlevels
84 84 * dn_*blksz*
85 85 * phys nlevels, maxblkid, physical blkptr_t's (?)
86 86 * held from:
87 87 * callers of dbuf_read_impl, dbuf_hold[_impl], dbuf_prefetch
88 88 * dmu_object_info_from_dnode: dn_dirty_mtx (dn_datablksz)
89 89 * dmu_tx_count_free:
90 90 * dbuf_read_impl: db_mtx, dmu_zfetch()
91 91 * dmu_zfetch: zf_rwlock/r, zst_lock, dbuf_prefetch()
92 92 * dbuf_new_size: db_mtx
93 93 * dbuf_dirty: db_mtx
94 94 * dbuf_findbp: (callers, phys? - the real need)
95 95 * dbuf_create: dn_dbufs_mtx, hash_mutexes, db_mtx (phys?)
96 96 * dbuf_prefetch: dn_dirty_mtx, hash_mutexes, db_mtx, dn_dbufs_mtx
97 97 * dbuf_hold_impl: hash_mutexes, db_mtx, dn_dbufs_mtx, dbuf_findbp()
98 98 * dnode_sync/w (increase_indirection): db_mtx (phys)
99 99 * dnode_set_blksz/w: dn_dbufs_mtx (dn_*blksz*)
100 100 * dnode_new_blkid/w: (dn_maxblkid)
101 101 * dnode_free_range/w: dn_dirty_mtx (dn_maxblkid)
102 102 * dnode_next_offset: (phys)
103 103 *
104 104 * dn_dbufs_mtx
105 105 * must be held before:
106 106 * db_mtx, hash_mutexes
107 107 * protects:
108 108 * dn_dbufs
109 109 * dn_evicted
110 110 * held from:
111 111 * dmu_evict_user: db_mtx (dn_dbufs)
112 112 * dbuf_free_range: db_mtx (dn_dbufs)
113 113 * dbuf_remove_ref: db_mtx, callees:
114 114 * dbuf_hash_remove: hash_mutexes, db_mtx
115 115 * dbuf_create: hash_mutexes, db_mtx (dn_dbufs)
116 116 * dnode_set_blksz: (dn_dbufs)
117 117 *
118 118 * hash_mutexes (global)
119 119 * must be held before:
120 120 * db_mtx
121 121 * protects dbuf_hash_table (global) and db_hash_next
122 122 * held from:
123 123 * dbuf_find: db_mtx
124 124 * dbuf_hash_insert: db_mtx
125 125 * dbuf_hash_remove: db_mtx
126 126 *
127 127 * db_mtx (meta-leaf)
128 128 * must be held before:
129 129 * dn_mtx, dn_dirty_mtx, dd_lock (leaf mutexes)
130 130 * protects:
131 131 * db_state
132 132 * db_holds
133 133 * db_buf
134 134 * db_changed
135 135 * db_data_pending
136 136 * db_dirtied
137 137 * db_link
138 138 * db_dirty_node (??)
139 139 * db_dirtycnt
140 140 * db_d.*
141 141 * db.*
142 142 * held from:
143 143 * dbuf_dirty: dn_mtx, dn_dirty_mtx
144 144 * dbuf_dirty->dsl_dir_willuse_space: dd_lock
145 145 * dbuf_dirty->dbuf_new_block->dsl_dataset_block_freeable: dd_lock
146 146 * dbuf_undirty: dn_dirty_mtx (db_d)
147 147 * dbuf_write_done: dn_dirty_mtx (db_state)
148 148 * dbuf_*
149 149 * dmu_buf_update_user: none (db_d)
150 150 * dmu_evict_user: none (db_d) (maybe can eliminate)
151 151 * dbuf_find: none (db_holds)
152 152 * dbuf_hash_insert: none (db_holds)
153 153 * dmu_buf_read_array_impl: none (db_state, db_changed)
154 154 * dmu_sync: none (db_dirty_node, db_d)
155 155 * dnode_reallocate: none (db)
156 156 *
157 157 * dn_mtx (leaf)
158 158 * protects:
159 159 * dn_dirty_dbufs
160 160 * dn_ranges
161 161 * phys accounting
162 162 * dn_allocated_txg
163 163 * dn_free_txg
164 164 * dn_assigned_txg
165 165 * dd_assigned_tx
166 166 * dn_notxholds
167 167 * dn_dirtyctx
168 168 * dn_dirtyctx_firstset
169 169 * (dn_phys copy fields?)
170 170 * (dn_phys contents?)
171 171 * held from:
172 172 * dnode_*
173 173 * dbuf_dirty: none
174 174 * dbuf_sync: none (phys accounting)
175 175 * dbuf_undirty: none (dn_ranges, dn_dirty_dbufs)
176 176 * dbuf_write_done: none (phys accounting)
177 177 * dmu_object_info_from_dnode: none (accounting)
178 178 * dmu_tx_commit: none
179 179 * dmu_tx_hold_object_impl: none
180 180 * dmu_tx_try_assign: dn_notxholds(cv)
181 181 * dmu_tx_unassign: none
182 182 *
183 183 * dd_lock
184 184 * must be held before:
185 185 * ds_lock
186 186 * ancestors' dd_lock
187 187 * protects:
188 188 * dd_prop_cbs
189 189 * dd_sync_*
190 190 * dd_used_bytes
191 191 * dd_tempreserved
192 192 * dd_space_towrite
193 193 * dd_myname
194 194 * dd_phys accounting?
195 195 * held from:
196 196 * dsl_dir_*
197 197 * dsl_prop_changed_notify: none (dd_prop_cbs)
198 198 * dsl_prop_register: none (dd_prop_cbs)
199 199 * dsl_prop_unregister: none (dd_prop_cbs)
200 200 * dsl_dataset_block_freeable: none (dd_sync_*)
201 201 *
202 202 * os_lock (leaf)
203 203 * protects:
204 204 * os_dirty_dnodes
205 205 * os_free_dnodes
206 206 * os_dnodes
207 207 * os_downgraded_dbufs
208 208 * dn_dirtyblksz
209 209 * dn_dirty_link
210 210 * held from:
211 211 * dnode_create: none (os_dnodes)
212 212 * dnode_destroy: none (os_dnodes)
213 213 * dnode_setdirty: none (dn_dirtyblksz, os_*_dnodes)
214 214 * dnode_free: none (dn_dirtyblksz, os_*_dnodes)
215 215 *
216 216 * ds_lock
217 217 * protects:
218 218 * ds_objset
219 219 * ds_open_refcount
220 220 * ds_snapname
221 221 * ds_phys accounting
222 222 * ds_phys userrefs zapobj
223 223 * ds_reserved
224 224 * held from:
225 225 * dsl_dataset_*
226 226 *
227 227 * dr_mtx (leaf)
228 228 * protects:
229 229 * dr_children
230 230 * held from:
231 231 * dbuf_dirty
232 232 * dbuf_undirty
233 233 * dbuf_sync_indirect
234 234 * dnode_new_blkid
235 235 */
236 236
237 237 struct objset;
238 238 struct dmu_pool;
239 239
240 240 typedef struct dmu_xuio {
241 241 int next;
242 242 int cnt;
243 243 struct arc_buf **bufs;
244 244 iovec_t *iovp;
245 245 } dmu_xuio_t;
246 246
247 247 typedef struct xuio_stats {
248 248 /* loaned yet not returned arc_buf */
249 249 kstat_named_t xuiostat_onloan_rbuf;
250 250 kstat_named_t xuiostat_onloan_wbuf;
251 251 /* whether a copy is made when loaning out a read buffer */
252 252 kstat_named_t xuiostat_rbuf_copied;
253 253 kstat_named_t xuiostat_rbuf_nocopy;
254 254 /* whether a copy is made when assigning a write buffer */
255 255 kstat_named_t xuiostat_wbuf_copied;
256 256 kstat_named_t xuiostat_wbuf_nocopy;
257 257 } xuio_stats_t;
258 258
259 259 static xuio_stats_t xuio_stats = {
260 260 { "onloan_read_buf", KSTAT_DATA_UINT64 },
261 261 { "onloan_write_buf", KSTAT_DATA_UINT64 },
262 262 { "read_buf_copied", KSTAT_DATA_UINT64 },
263 263 { "read_buf_nocopy", KSTAT_DATA_UINT64 },
264 264 { "write_buf_copied", KSTAT_DATA_UINT64 },
265 265 { "write_buf_nocopy", KSTAT_DATA_UINT64 }
266 266 };
267 267
268 268 #define XUIOSTAT_INCR(stat, val) \
269 269 atomic_add_64(&xuio_stats.stat.value.ui64, (val))
270 270 #define XUIOSTAT_BUMP(stat) XUIOSTAT_INCR(stat, 1)
271 271
272 272 /*
273 273 * The list of data whose inclusion in a send stream can be pending from
274 274 * one call to backup_cb to another. Multiple calls to dump_free() and
275 275 * dump_freeobjects() can be aggregated into a single DRR_FREE or
276 276 * DRR_FREEOBJECTS replay record.
277 277 */
278 278 typedef enum {
279 279 PENDING_NONE,
280 280 PENDING_FREE,
281 281 PENDING_FREEOBJECTS
282 282 } dmu_pendop_t;
283 283
284 284 typedef struct dmu_sendarg {
285 285 list_node_t dsa_link;
286 286 dmu_replay_record_t *dsa_drr;
287 287 vnode_t *dsa_vp;
288 288 int dsa_outfd;
289 289 struct proc *dsa_proc;
290 290 offset_t *dsa_off;
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291 291 objset_t *dsa_os;
292 292 zio_cksum_t dsa_zc;
293 293 uint64_t dsa_toguid;
294 294 int dsa_err;
295 295 dmu_pendop_t dsa_pending_op;
296 296 boolean_t dsa_incremental;
297 297 uint64_t dsa_last_data_object;
298 298 uint64_t dsa_last_data_offset;
299 299 } dmu_sendarg_t;
300 300
301 +void dmu_object_zapify(objset_t *, uint64_t, dmu_object_type_t, dmu_tx_t *);
302 +void dmu_object_free_zapified(objset_t *, uint64_t, dmu_tx_t *);
301 303
302 304 #ifdef __cplusplus
303 305 }
304 306 #endif
305 307
306 308 #endif /* _SYS_DMU_IMPL_H */
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