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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
9babb374 | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
25 | ||
34dc7c2f BB |
26 | #include <sys/dmu.h> |
27 | #include <sys/dmu_objset.h> | |
28 | #include <sys/dmu_tx.h> | |
29 | #include <sys/dsl_dataset.h> | |
30 | #include <sys/dsl_dir.h> | |
31 | #include <sys/dsl_prop.h> | |
32 | #include <sys/dsl_synctask.h> | |
33 | #include <sys/spa.h> | |
34 | #include <sys/zio_checksum.h> /* for the default checksum value */ | |
35 | #include <sys/zap.h> | |
36 | #include <sys/fs/zfs.h> | |
37 | ||
38 | #include "zfs_prop.h" | |
39 | ||
40 | static int | |
41 | dodefault(const char *propname, int intsz, int numint, void *buf) | |
42 | { | |
43 | zfs_prop_t prop; | |
44 | ||
45 | /* | |
46 | * The setonce properties are read-only, BUT they still | |
47 | * have a default value that can be used as the initial | |
48 | * value. | |
49 | */ | |
50 | if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL || | |
51 | (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop))) | |
52 | return (ENOENT); | |
53 | ||
54 | if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) { | |
55 | if (intsz != 1) | |
56 | return (EOVERFLOW); | |
57 | (void) strncpy(buf, zfs_prop_default_string(prop), | |
58 | numint); | |
59 | } else { | |
60 | if (intsz != 8 || numint < 1) | |
61 | return (EOVERFLOW); | |
62 | ||
63 | *(uint64_t *)buf = zfs_prop_default_numeric(prop); | |
64 | } | |
65 | ||
66 | return (0); | |
67 | } | |
68 | ||
b128c09f BB |
69 | int |
70 | dsl_prop_get_dd(dsl_dir_t *dd, const char *propname, | |
34dc7c2f BB |
71 | int intsz, int numint, void *buf, char *setpoint) |
72 | { | |
73 | int err = ENOENT; | |
b128c09f | 74 | objset_t *mos = dd->dd_pool->dp_meta_objset; |
34dc7c2f BB |
75 | zfs_prop_t prop; |
76 | ||
b128c09f BB |
77 | ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock)); |
78 | ||
34dc7c2f BB |
79 | if (setpoint) |
80 | setpoint[0] = '\0'; | |
81 | ||
82 | prop = zfs_name_to_prop(propname); | |
83 | ||
84 | /* | |
85 | * Note: dd may be NULL, therefore we shouldn't dereference it | |
86 | * ouside this loop. | |
87 | */ | |
88 | for (; dd != NULL; dd = dd->dd_parent) { | |
34dc7c2f BB |
89 | ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock)); |
90 | err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj, | |
91 | propname, intsz, numint, buf); | |
92 | if (err != ENOENT) { | |
93 | if (setpoint) | |
94 | dsl_dir_name(dd, setpoint); | |
95 | break; | |
96 | } | |
97 | ||
98 | /* | |
99 | * Break out of this loop for non-inheritable properties. | |
100 | */ | |
101 | if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) | |
102 | break; | |
103 | } | |
104 | if (err == ENOENT) | |
105 | err = dodefault(propname, intsz, numint, buf); | |
106 | ||
107 | return (err); | |
108 | } | |
109 | ||
b128c09f BB |
110 | int |
111 | dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname, | |
112 | int intsz, int numint, void *buf, char *setpoint) | |
113 | { | |
114 | ASSERT(RW_LOCK_HELD(&ds->ds_dir->dd_pool->dp_config_rwlock)); | |
115 | ||
116 | if (ds->ds_phys->ds_props_obj) { | |
117 | int err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, | |
118 | ds->ds_phys->ds_props_obj, propname, intsz, numint, buf); | |
119 | if (err != ENOENT) { | |
120 | if (setpoint) | |
121 | dsl_dataset_name(ds, setpoint); | |
122 | return (err); | |
123 | } | |
124 | } | |
125 | ||
126 | return (dsl_prop_get_dd(ds->ds_dir, propname, | |
127 | intsz, numint, buf, setpoint)); | |
128 | } | |
129 | ||
34dc7c2f BB |
130 | /* |
131 | * Register interest in the named property. We'll call the callback | |
132 | * once to notify it of the current property value, and again each time | |
133 | * the property changes, until this callback is unregistered. | |
134 | * | |
135 | * Return 0 on success, errno if the prop is not an integer value. | |
136 | */ | |
137 | int | |
138 | dsl_prop_register(dsl_dataset_t *ds, const char *propname, | |
139 | dsl_prop_changed_cb_t *callback, void *cbarg) | |
140 | { | |
141 | dsl_dir_t *dd = ds->ds_dir; | |
b128c09f | 142 | dsl_pool_t *dp = dd->dd_pool; |
34dc7c2f BB |
143 | uint64_t value; |
144 | dsl_prop_cb_record_t *cbr; | |
145 | int err; | |
146 | int need_rwlock; | |
147 | ||
b128c09f | 148 | need_rwlock = !RW_WRITE_HELD(&dp->dp_config_rwlock); |
34dc7c2f | 149 | if (need_rwlock) |
b128c09f | 150 | rw_enter(&dp->dp_config_rwlock, RW_READER); |
34dc7c2f | 151 | |
b128c09f | 152 | err = dsl_prop_get_ds(ds, propname, 8, 1, &value, NULL); |
34dc7c2f BB |
153 | if (err != 0) { |
154 | if (need_rwlock) | |
b128c09f | 155 | rw_exit(&dp->dp_config_rwlock); |
34dc7c2f BB |
156 | return (err); |
157 | } | |
158 | ||
159 | cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP); | |
160 | cbr->cbr_ds = ds; | |
161 | cbr->cbr_propname = kmem_alloc(strlen(propname)+1, KM_SLEEP); | |
162 | (void) strcpy((char *)cbr->cbr_propname, propname); | |
163 | cbr->cbr_func = callback; | |
164 | cbr->cbr_arg = cbarg; | |
165 | mutex_enter(&dd->dd_lock); | |
166 | list_insert_head(&dd->dd_prop_cbs, cbr); | |
167 | mutex_exit(&dd->dd_lock); | |
168 | ||
169 | cbr->cbr_func(cbr->cbr_arg, value); | |
170 | ||
b128c09f | 171 | VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object, |
34dc7c2f BB |
172 | NULL, cbr, &dd)); |
173 | if (need_rwlock) | |
b128c09f BB |
174 | rw_exit(&dp->dp_config_rwlock); |
175 | /* Leave dir open until this callback is unregistered */ | |
34dc7c2f BB |
176 | return (0); |
177 | } | |
178 | ||
179 | int | |
b128c09f | 180 | dsl_prop_get(const char *dsname, const char *propname, |
34dc7c2f BB |
181 | int intsz, int numints, void *buf, char *setpoint) |
182 | { | |
b128c09f | 183 | dsl_dataset_t *ds; |
34dc7c2f BB |
184 | int err; |
185 | ||
b128c09f | 186 | err = dsl_dataset_hold(dsname, FTAG, &ds); |
34dc7c2f BB |
187 | if (err) |
188 | return (err); | |
34dc7c2f | 189 | |
b128c09f BB |
190 | rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); |
191 | err = dsl_prop_get_ds(ds, propname, intsz, numints, buf, setpoint); | |
192 | rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); | |
34dc7c2f | 193 | |
b128c09f | 194 | dsl_dataset_rele(ds, FTAG); |
34dc7c2f BB |
195 | return (err); |
196 | } | |
197 | ||
198 | /* | |
199 | * Get the current property value. It may have changed by the time this | |
200 | * function returns, so it is NOT safe to follow up with | |
201 | * dsl_prop_register() and assume that the value has not changed in | |
202 | * between. | |
203 | * | |
204 | * Return 0 on success, ENOENT if ddname is invalid. | |
205 | */ | |
206 | int | |
207 | dsl_prop_get_integer(const char *ddname, const char *propname, | |
208 | uint64_t *valuep, char *setpoint) | |
209 | { | |
210 | return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint)); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Unregister this callback. Return 0 on success, ENOENT if ddname is | |
215 | * invalid, ENOMSG if no matching callback registered. | |
216 | */ | |
217 | int | |
218 | dsl_prop_unregister(dsl_dataset_t *ds, const char *propname, | |
219 | dsl_prop_changed_cb_t *callback, void *cbarg) | |
220 | { | |
221 | dsl_dir_t *dd = ds->ds_dir; | |
222 | dsl_prop_cb_record_t *cbr; | |
223 | ||
224 | mutex_enter(&dd->dd_lock); | |
225 | for (cbr = list_head(&dd->dd_prop_cbs); | |
226 | cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) { | |
227 | if (cbr->cbr_ds == ds && | |
228 | cbr->cbr_func == callback && | |
229 | cbr->cbr_arg == cbarg && | |
230 | strcmp(cbr->cbr_propname, propname) == 0) | |
231 | break; | |
232 | } | |
233 | ||
234 | if (cbr == NULL) { | |
235 | mutex_exit(&dd->dd_lock); | |
236 | return (ENOMSG); | |
237 | } | |
238 | ||
239 | list_remove(&dd->dd_prop_cbs, cbr); | |
240 | mutex_exit(&dd->dd_lock); | |
241 | kmem_free((void*)cbr->cbr_propname, strlen(cbr->cbr_propname)+1); | |
242 | kmem_free(cbr, sizeof (dsl_prop_cb_record_t)); | |
243 | ||
244 | /* Clean up from dsl_prop_register */ | |
245 | dsl_dir_close(dd, cbr); | |
246 | return (0); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Return the number of callbacks that are registered for this dataset. | |
251 | */ | |
252 | int | |
253 | dsl_prop_numcb(dsl_dataset_t *ds) | |
254 | { | |
255 | dsl_dir_t *dd = ds->ds_dir; | |
256 | dsl_prop_cb_record_t *cbr; | |
257 | int num = 0; | |
258 | ||
259 | mutex_enter(&dd->dd_lock); | |
260 | for (cbr = list_head(&dd->dd_prop_cbs); | |
261 | cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) { | |
262 | if (cbr->cbr_ds == ds) | |
263 | num++; | |
264 | } | |
265 | mutex_exit(&dd->dd_lock); | |
266 | ||
267 | return (num); | |
268 | } | |
269 | ||
270 | static void | |
271 | dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj, | |
272 | const char *propname, uint64_t value, int first) | |
273 | { | |
274 | dsl_dir_t *dd; | |
275 | dsl_prop_cb_record_t *cbr; | |
276 | objset_t *mos = dp->dp_meta_objset; | |
277 | zap_cursor_t zc; | |
278 | zap_attribute_t *za; | |
279 | int err; | |
b128c09f | 280 | uint64_t dummyval; |
34dc7c2f BB |
281 | |
282 | ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock)); | |
283 | err = dsl_dir_open_obj(dp, ddobj, NULL, FTAG, &dd); | |
284 | if (err) | |
285 | return; | |
286 | ||
287 | if (!first) { | |
288 | /* | |
289 | * If the prop is set here, then this change is not | |
290 | * being inherited here or below; stop the recursion. | |
291 | */ | |
292 | err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj, propname, | |
b128c09f | 293 | 8, 1, &dummyval); |
34dc7c2f BB |
294 | if (err == 0) { |
295 | dsl_dir_close(dd, FTAG); | |
296 | return; | |
297 | } | |
298 | ASSERT3U(err, ==, ENOENT); | |
299 | } | |
300 | ||
301 | mutex_enter(&dd->dd_lock); | |
b128c09f BB |
302 | for (cbr = list_head(&dd->dd_prop_cbs); cbr; |
303 | cbr = list_next(&dd->dd_prop_cbs, cbr)) { | |
304 | uint64_t propobj = cbr->cbr_ds->ds_phys->ds_props_obj; | |
305 | ||
306 | if (strcmp(cbr->cbr_propname, propname) != 0) | |
307 | continue; | |
308 | ||
309 | /* | |
310 | * If the property is set on this ds, then it is not | |
311 | * inherited here; don't call the callback. | |
312 | */ | |
313 | if (propobj && 0 == zap_lookup(mos, propobj, propname, | |
314 | 8, 1, &dummyval)) | |
315 | continue; | |
316 | ||
317 | cbr->cbr_func(cbr->cbr_arg, value); | |
34dc7c2f BB |
318 | } |
319 | mutex_exit(&dd->dd_lock); | |
320 | ||
321 | za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); | |
322 | for (zap_cursor_init(&zc, mos, | |
323 | dd->dd_phys->dd_child_dir_zapobj); | |
324 | zap_cursor_retrieve(&zc, za) == 0; | |
325 | zap_cursor_advance(&zc)) { | |
326 | dsl_prop_changed_notify(dp, za->za_first_integer, | |
327 | propname, value, FALSE); | |
328 | } | |
329 | kmem_free(za, sizeof (zap_attribute_t)); | |
330 | zap_cursor_fini(&zc); | |
331 | dsl_dir_close(dd, FTAG); | |
332 | } | |
333 | ||
334 | struct prop_set_arg { | |
335 | const char *name; | |
336 | int intsz; | |
337 | int numints; | |
338 | const void *buf; | |
339 | }; | |
340 | ||
341 | ||
342 | static void | |
343 | dsl_prop_set_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) | |
344 | { | |
b128c09f | 345 | dsl_dataset_t *ds = arg1; |
34dc7c2f | 346 | struct prop_set_arg *psa = arg2; |
b128c09f BB |
347 | objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; |
348 | uint64_t zapobj, intval; | |
34dc7c2f BB |
349 | int isint; |
350 | char valbuf[32]; | |
351 | char *valstr; | |
352 | ||
353 | isint = (dodefault(psa->name, 8, 1, &intval) == 0); | |
354 | ||
b128c09f BB |
355 | if (dsl_dataset_is_snapshot(ds)) { |
356 | ASSERT(spa_version(ds->ds_dir->dd_pool->dp_spa) >= | |
357 | SPA_VERSION_SNAP_PROPS); | |
358 | if (ds->ds_phys->ds_props_obj == 0) { | |
359 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
360 | ds->ds_phys->ds_props_obj = | |
361 | zap_create(mos, | |
362 | DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx); | |
363 | } | |
364 | zapobj = ds->ds_phys->ds_props_obj; | |
365 | } else { | |
366 | zapobj = ds->ds_dir->dd_phys->dd_props_zapobj; | |
367 | } | |
368 | ||
34dc7c2f BB |
369 | if (psa->numints == 0) { |
370 | int err = zap_remove(mos, zapobj, psa->name, tx); | |
371 | ASSERT(err == 0 || err == ENOENT); | |
372 | if (isint) { | |
b128c09f | 373 | VERIFY(0 == dsl_prop_get_ds(ds, |
34dc7c2f BB |
374 | psa->name, 8, 1, &intval, NULL)); |
375 | } | |
376 | } else { | |
377 | VERIFY(0 == zap_update(mos, zapobj, psa->name, | |
378 | psa->intsz, psa->numints, psa->buf, tx)); | |
379 | if (isint) | |
380 | intval = *(uint64_t *)psa->buf; | |
381 | } | |
382 | ||
383 | if (isint) { | |
b128c09f BB |
384 | if (dsl_dataset_is_snapshot(ds)) { |
385 | dsl_prop_cb_record_t *cbr; | |
386 | /* | |
387 | * It's a snapshot; nothing can inherit this | |
388 | * property, so just look for callbacks on this | |
389 | * ds here. | |
390 | */ | |
391 | mutex_enter(&ds->ds_dir->dd_lock); | |
392 | for (cbr = list_head(&ds->ds_dir->dd_prop_cbs); cbr; | |
393 | cbr = list_next(&ds->ds_dir->dd_prop_cbs, cbr)) { | |
394 | if (cbr->cbr_ds == ds && | |
395 | strcmp(cbr->cbr_propname, psa->name) == 0) | |
396 | cbr->cbr_func(cbr->cbr_arg, intval); | |
397 | } | |
398 | mutex_exit(&ds->ds_dir->dd_lock); | |
399 | } else { | |
400 | dsl_prop_changed_notify(ds->ds_dir->dd_pool, | |
401 | ds->ds_dir->dd_object, psa->name, intval, TRUE); | |
402 | } | |
34dc7c2f BB |
403 | } |
404 | if (isint) { | |
405 | (void) snprintf(valbuf, sizeof (valbuf), | |
406 | "%lld", (longlong_t)intval); | |
407 | valstr = valbuf; | |
408 | } else { | |
409 | valstr = (char *)psa->buf; | |
410 | } | |
411 | spa_history_internal_log((psa->numints == 0) ? LOG_DS_INHERIT : | |
b128c09f BB |
412 | LOG_DS_PROPSET, ds->ds_dir->dd_pool->dp_spa, tx, cr, |
413 | "%s=%s dataset = %llu", psa->name, valstr, ds->ds_object); | |
34dc7c2f BB |
414 | } |
415 | ||
9babb374 BB |
416 | void |
417 | dsl_props_set_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) | |
418 | { | |
419 | dsl_dataset_t *ds = arg1; | |
420 | nvlist_t *nvl = arg2; | |
421 | nvpair_t *elem = NULL; | |
422 | ||
423 | while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { | |
424 | struct prop_set_arg psa; | |
425 | ||
426 | psa.name = nvpair_name(elem); | |
427 | ||
428 | if (nvpair_type(elem) == DATA_TYPE_STRING) { | |
429 | VERIFY(nvpair_value_string(elem, | |
430 | (char **)&psa.buf) == 0); | |
431 | psa.intsz = 1; | |
432 | psa.numints = strlen(psa.buf) + 1; | |
433 | } else { | |
434 | uint64_t intval; | |
435 | VERIFY(nvpair_value_uint64(elem, &intval) == 0); | |
436 | psa.intsz = sizeof (intval); | |
437 | psa.numints = 1; | |
438 | psa.buf = &intval; | |
439 | } | |
440 | dsl_prop_set_sync(ds, &psa, cr, tx); | |
441 | } | |
442 | } | |
443 | ||
34dc7c2f BB |
444 | void |
445 | dsl_prop_set_uint64_sync(dsl_dir_t *dd, const char *name, uint64_t val, | |
446 | cred_t *cr, dmu_tx_t *tx) | |
447 | { | |
448 | objset_t *mos = dd->dd_pool->dp_meta_objset; | |
449 | uint64_t zapobj = dd->dd_phys->dd_props_zapobj; | |
450 | ||
451 | ASSERT(dmu_tx_is_syncing(tx)); | |
452 | ||
453 | VERIFY(0 == zap_update(mos, zapobj, name, sizeof (val), 1, &val, tx)); | |
454 | ||
455 | dsl_prop_changed_notify(dd->dd_pool, dd->dd_object, name, val, TRUE); | |
456 | ||
457 | spa_history_internal_log(LOG_DS_PROPSET, dd->dd_pool->dp_spa, tx, cr, | |
458 | "%s=%llu dataset = %llu", name, (u_longlong_t)val, | |
459 | dd->dd_phys->dd_head_dataset_obj); | |
460 | } | |
461 | ||
462 | int | |
b128c09f | 463 | dsl_prop_set(const char *dsname, const char *propname, |
34dc7c2f BB |
464 | int intsz, int numints, const void *buf) |
465 | { | |
b128c09f | 466 | dsl_dataset_t *ds; |
9babb374 | 467 | uint64_t version; |
34dc7c2f | 468 | int err; |
b128c09f | 469 | struct prop_set_arg psa; |
34dc7c2f BB |
470 | |
471 | /* | |
472 | * We must do these checks before we get to the syncfunc, since | |
473 | * it can't fail. | |
474 | */ | |
475 | if (strlen(propname) >= ZAP_MAXNAMELEN) | |
476 | return (ENAMETOOLONG); | |
34dc7c2f | 477 | |
b128c09f | 478 | err = dsl_dataset_hold(dsname, FTAG, &ds); |
34dc7c2f BB |
479 | if (err) |
480 | return (err); | |
b128c09f | 481 | |
9babb374 BB |
482 | version = spa_version(ds->ds_dir->dd_pool->dp_spa); |
483 | if (intsz * numints >= (version < SPA_VERSION_STMF_PROP ? | |
484 | ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) { | |
485 | dsl_dataset_rele(ds, FTAG); | |
486 | return (E2BIG); | |
487 | } | |
b128c09f | 488 | if (dsl_dataset_is_snapshot(ds) && |
9babb374 | 489 | version < SPA_VERSION_SNAP_PROPS) { |
b128c09f BB |
490 | dsl_dataset_rele(ds, FTAG); |
491 | return (ENOTSUP); | |
492 | } | |
493 | ||
494 | psa.name = propname; | |
495 | psa.intsz = intsz; | |
496 | psa.numints = numints; | |
497 | psa.buf = buf; | |
498 | err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
499 | NULL, dsl_prop_set_sync, ds, &psa, 2); | |
500 | ||
501 | dsl_dataset_rele(ds, FTAG); | |
34dc7c2f BB |
502 | return (err); |
503 | } | |
504 | ||
9babb374 BB |
505 | int |
506 | dsl_props_set(const char *dsname, nvlist_t *nvl) | |
507 | { | |
508 | dsl_dataset_t *ds; | |
509 | uint64_t version; | |
510 | nvpair_t *elem = NULL; | |
511 | int err; | |
512 | ||
513 | if (err = dsl_dataset_hold(dsname, FTAG, &ds)) | |
514 | return (err); | |
515 | /* | |
516 | * Do these checks before the syncfunc, since it can't fail. | |
517 | */ | |
518 | version = spa_version(ds->ds_dir->dd_pool->dp_spa); | |
519 | while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { | |
520 | if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { | |
521 | dsl_dataset_rele(ds, FTAG); | |
522 | return (ENAMETOOLONG); | |
523 | } | |
524 | if (nvpair_type(elem) == DATA_TYPE_STRING) { | |
525 | char *valstr; | |
526 | VERIFY(nvpair_value_string(elem, &valstr) == 0); | |
527 | if (strlen(valstr) >= (version < | |
528 | SPA_VERSION_STMF_PROP ? | |
529 | ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) { | |
530 | dsl_dataset_rele(ds, FTAG); | |
531 | return (E2BIG); | |
532 | } | |
533 | } | |
534 | } | |
535 | ||
536 | if (dsl_dataset_is_snapshot(ds) && | |
537 | version < SPA_VERSION_SNAP_PROPS) { | |
538 | dsl_dataset_rele(ds, FTAG); | |
539 | return (ENOTSUP); | |
540 | } | |
541 | ||
542 | err = dsl_sync_task_do(ds->ds_dir->dd_pool, | |
543 | NULL, dsl_props_set_sync, ds, nvl, 2); | |
544 | ||
545 | dsl_dataset_rele(ds, FTAG); | |
546 | return (err); | |
547 | } | |
548 | ||
34dc7c2f BB |
549 | /* |
550 | * Iterate over all properties for this dataset and return them in an nvlist. | |
551 | */ | |
552 | int | |
b128c09f | 553 | dsl_prop_get_all(objset_t *os, nvlist_t **nvp, boolean_t local) |
34dc7c2f BB |
554 | { |
555 | dsl_dataset_t *ds = os->os->os_dsl_dataset; | |
556 | dsl_dir_t *dd = ds->ds_dir; | |
b128c09f | 557 | boolean_t snapshot = dsl_dataset_is_snapshot(ds); |
34dc7c2f | 558 | int err = 0; |
b128c09f BB |
559 | dsl_pool_t *dp = dd->dd_pool; |
560 | objset_t *mos = dp->dp_meta_objset; | |
561 | uint64_t propobj = ds->ds_phys->ds_props_obj; | |
34dc7c2f BB |
562 | |
563 | VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
564 | ||
b128c09f BB |
565 | if (local && snapshot && !propobj) |
566 | return (0); | |
34dc7c2f BB |
567 | |
568 | rw_enter(&dp->dp_config_rwlock, RW_READER); | |
b128c09f | 569 | while (dd != NULL) { |
34dc7c2f BB |
570 | char setpoint[MAXNAMELEN]; |
571 | zap_cursor_t zc; | |
572 | zap_attribute_t za; | |
b128c09f BB |
573 | dsl_dir_t *dd_next; |
574 | ||
575 | if (propobj) { | |
576 | dsl_dataset_name(ds, setpoint); | |
577 | dd_next = dd; | |
578 | } else { | |
579 | dsl_dir_name(dd, setpoint); | |
580 | propobj = dd->dd_phys->dd_props_zapobj; | |
581 | dd_next = dd->dd_parent; | |
582 | } | |
34dc7c2f | 583 | |
b128c09f | 584 | for (zap_cursor_init(&zc, mos, propobj); |
34dc7c2f BB |
585 | (err = zap_cursor_retrieve(&zc, &za)) == 0; |
586 | zap_cursor_advance(&zc)) { | |
587 | nvlist_t *propval; | |
b128c09f BB |
588 | zfs_prop_t prop = zfs_name_to_prop(za.za_name); |
589 | ||
590 | /* Skip non-inheritable properties. */ | |
591 | if (prop != ZPROP_INVAL && | |
592 | !zfs_prop_inheritable(prop) && | |
593 | (dd != ds->ds_dir || (snapshot && dd != dd_next))) | |
34dc7c2f BB |
594 | continue; |
595 | ||
b128c09f BB |
596 | /* Skip properties not valid for this type. */ |
597 | if (snapshot && prop != ZPROP_INVAL && | |
34dc7c2f BB |
598 | !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT)) |
599 | continue; | |
600 | ||
b128c09f | 601 | /* Skip properties already defined */ |
34dc7c2f BB |
602 | if (nvlist_lookup_nvlist(*nvp, za.za_name, |
603 | &propval) == 0) | |
604 | continue; | |
605 | ||
606 | VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, | |
607 | KM_SLEEP) == 0); | |
608 | if (za.za_integer_length == 1) { | |
609 | /* | |
610 | * String property | |
611 | */ | |
612 | char *tmp = kmem_alloc(za.za_num_integers, | |
613 | KM_SLEEP); | |
b128c09f BB |
614 | err = zap_lookup(mos, propobj, |
615 | za.za_name, 1, za.za_num_integers, tmp); | |
34dc7c2f BB |
616 | if (err != 0) { |
617 | kmem_free(tmp, za.za_num_integers); | |
618 | break; | |
619 | } | |
620 | VERIFY(nvlist_add_string(propval, ZPROP_VALUE, | |
621 | tmp) == 0); | |
622 | kmem_free(tmp, za.za_num_integers); | |
623 | } else { | |
624 | /* | |
625 | * Integer property | |
626 | */ | |
627 | ASSERT(za.za_integer_length == 8); | |
628 | (void) nvlist_add_uint64(propval, ZPROP_VALUE, | |
629 | za.za_first_integer); | |
630 | } | |
631 | ||
632 | VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, | |
633 | setpoint) == 0); | |
634 | VERIFY(nvlist_add_nvlist(*nvp, za.za_name, | |
635 | propval) == 0); | |
636 | nvlist_free(propval); | |
637 | } | |
638 | zap_cursor_fini(&zc); | |
639 | ||
640 | if (err != ENOENT) | |
641 | break; | |
642 | err = 0; | |
b128c09f BB |
643 | /* |
644 | * If we are just after the props that have been set | |
645 | * locally, then we are done after the first iteration. | |
646 | */ | |
647 | if (local) | |
648 | break; | |
649 | dd = dd_next; | |
650 | propobj = 0; | |
34dc7c2f BB |
651 | } |
652 | rw_exit(&dp->dp_config_rwlock); | |
653 | ||
654 | return (err); | |
655 | } | |
656 | ||
657 | void | |
658 | dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value) | |
659 | { | |
660 | nvlist_t *propval; | |
661 | ||
662 | VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
663 | VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0); | |
664 | VERIFY(nvlist_add_nvlist(nv, zfs_prop_to_name(prop), propval) == 0); | |
665 | nvlist_free(propval); | |
666 | } | |
667 | ||
668 | void | |
669 | dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value) | |
670 | { | |
671 | nvlist_t *propval; | |
672 | ||
673 | VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
674 | VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0); | |
675 | VERIFY(nvlist_add_nvlist(nv, zfs_prop_to_name(prop), propval) == 0); | |
676 | nvlist_free(propval); | |
677 | } |