1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
25 * Copyright (c) 2013 Martin Matuska. All rights reserved.
26 * Copyright 2019 Joyent, Inc.
27 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP.
28 */
29
30 #include <sys/zfs_context.h>
31 #include <sys/dmu.h>
32 #include <sys/dmu_objset.h>
33 #include <sys/dmu_tx.h>
34 #include <sys/dsl_dataset.h>
35 #include <sys/dsl_dir.h>
36 #include <sys/dsl_prop.h>
37 #include <sys/dsl_synctask.h>
38 #include <sys/spa.h>
39 #include <sys/zap.h>
40 #include <sys/fs/zfs.h>
41
42 #include "zfs_prop.h"
43
44 #define ZPROP_INHERIT_SUFFIX "$inherit"
45 #define ZPROP_RECVD_SUFFIX "$recvd"
46 #define ZPROP_IUV_SUFFIX "$iuv"
47
48 static int
dodefault(zfs_prop_t prop,int intsz,int numints,void * buf)49 dodefault(zfs_prop_t prop, int intsz, int numints, void *buf)
50 {
51 /*
52 * The setonce properties are read-only, BUT they still
53 * have a default value that can be used as the initial
54 * value.
55 */
56 if (prop == ZPROP_INVAL ||
57 (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
58 return (SET_ERROR(ENOENT));
59
60 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
61 if (intsz != 1)
62 return (SET_ERROR(EOVERFLOW));
63 (void) strlcpy(buf, zfs_prop_default_string(prop),
64 numints);
65 } else {
66 if (intsz != 8 || numints < 1)
67 return (SET_ERROR(EOVERFLOW));
68
69 *(uint64_t *)buf = zfs_prop_default_numeric(prop);
70 }
71
72 return (0);
73 }
74
75 static int
dsl_prop_known_index(zfs_prop_t prop,uint64_t value)76 dsl_prop_known_index(zfs_prop_t prop, uint64_t value)
77 {
78 const char *str = NULL;
79 if (prop != ZPROP_CONT && prop != ZPROP_INVAL &&
80 zfs_prop_get_type(prop) == PROP_TYPE_INDEX)
81 return (!zfs_prop_index_to_string(prop, value, &str));
82
83 return (-1);
84 }
85
86 int
dsl_prop_get_dd(dsl_dir_t * dd,const char * propname,int intsz,int numints,void * buf,char * setpoint,boolean_t snapshot)87 dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
88 int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
89 {
90 int err;
91 dsl_dir_t *target = dd;
92 objset_t *mos = dd->dd_pool->dp_meta_objset;
93 zfs_prop_t prop;
94 boolean_t inheritable;
95 boolean_t inheriting = B_FALSE;
96 char *inheritstr;
97 char *recvdstr;
98 char *iuvstr;
99
100 ASSERT(dsl_pool_config_held(dd->dd_pool));
101
102 if (setpoint)
103 setpoint[0] = '\0';
104
105 prop = zfs_name_to_prop(propname);
106 inheritable = (prop == ZPROP_USERPROP || zfs_prop_inheritable(prop));
107 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
108 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
109 iuvstr = kmem_asprintf("%s%s", propname, ZPROP_IUV_SUFFIX);
110
111 /*
112 * Note: dd may become NULL, therefore we shouldn't dereference it
113 * after this loop.
114 */
115 for (; dd != NULL; dd = dd->dd_parent) {
116 if (dd != target || snapshot) {
117 if (!inheritable) {
118 err = SET_ERROR(ENOENT);
119 break;
120 }
121 inheriting = B_TRUE;
122 }
123
124 /* Check for a iuv value. */
125 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
126 iuvstr, intsz, numints, buf);
127 if (err == 0 && dsl_prop_known_index(prop,
128 *(uint64_t *)buf) != 1)
129 err = ENOENT;
130 if (err != ENOENT) {
131 if (setpoint != NULL && err == 0)
132 dsl_dir_name(dd, setpoint);
133 break;
134 }
135
136 /* Check for a local value. */
137 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
138 propname, intsz, numints, buf);
139 if (err != ENOENT) {
140 if (setpoint != NULL && err == 0)
141 dsl_dir_name(dd, setpoint);
142 break;
143 }
144
145 /*
146 * Skip the check for a received value if there is an explicit
147 * inheritance entry.
148 */
149 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
150 inheritstr);
151 if (err != 0 && err != ENOENT)
152 break;
153
154 if (err == ENOENT) {
155 /* Check for a received value. */
156 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
157 recvdstr, intsz, numints, buf);
158 if (err != ENOENT) {
159 if (setpoint != NULL && err == 0) {
160 if (inheriting) {
161 dsl_dir_name(dd, setpoint);
162 } else {
163 (void) strlcpy(setpoint,
164 ZPROP_SOURCE_VAL_RECVD,
165 MAXNAMELEN);
166 }
167 }
168 break;
169 }
170 }
171
172 /*
173 * If we found an explicit inheritance entry, err is zero even
174 * though we haven't yet found the value, so reinitializing err
175 * at the end of the loop (instead of at the beginning) ensures
176 * that err has a valid post-loop value.
177 */
178 err = SET_ERROR(ENOENT);
179 }
180
181 if (err == ENOENT)
182 err = dodefault(prop, intsz, numints, buf);
183
184 kmem_strfree(inheritstr);
185 kmem_strfree(recvdstr);
186 kmem_strfree(iuvstr);
187
188 return (err);
189 }
190
191 int
dsl_prop_get_ds(dsl_dataset_t * ds,const char * propname,int intsz,int numints,void * buf,char * setpoint)192 dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
193 int intsz, int numints, void *buf, char *setpoint)
194 {
195 zfs_prop_t prop = zfs_name_to_prop(propname);
196 boolean_t inheritable;
197 uint64_t zapobj;
198
199 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
200 inheritable = (prop == ZPROP_USERPROP || zfs_prop_inheritable(prop));
201 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
202
203 if (zapobj != 0) {
204 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
205 int err;
206
207 ASSERT(ds->ds_is_snapshot);
208
209 /* Check for a local value. */
210 err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
211 if (err != ENOENT) {
212 if (setpoint != NULL && err == 0)
213 dsl_dataset_name(ds, setpoint);
214 return (err);
215 }
216
217 /*
218 * Skip the check for a received value if there is an explicit
219 * inheritance entry.
220 */
221 if (inheritable) {
222 char *inheritstr = kmem_asprintf("%s%s", propname,
223 ZPROP_INHERIT_SUFFIX);
224 err = zap_contains(mos, zapobj, inheritstr);
225 kmem_strfree(inheritstr);
226 if (err != 0 && err != ENOENT)
227 return (err);
228 }
229
230 if (err == ENOENT) {
231 /* Check for a received value. */
232 char *recvdstr = kmem_asprintf("%s%s", propname,
233 ZPROP_RECVD_SUFFIX);
234 err = zap_lookup(mos, zapobj, recvdstr,
235 intsz, numints, buf);
236 kmem_strfree(recvdstr);
237 if (err != ENOENT) {
238 if (setpoint != NULL && err == 0)
239 (void) strlcpy(setpoint,
240 ZPROP_SOURCE_VAL_RECVD,
241 MAXNAMELEN);
242 return (err);
243 }
244 }
245 }
246
247 return (dsl_prop_get_dd(ds->ds_dir, propname,
248 intsz, numints, buf, setpoint, ds->ds_is_snapshot));
249 }
250
251 static dsl_prop_record_t *
dsl_prop_record_find(dsl_dir_t * dd,const char * propname)252 dsl_prop_record_find(dsl_dir_t *dd, const char *propname)
253 {
254 dsl_prop_record_t *pr = NULL;
255
256 ASSERT(MUTEX_HELD(&dd->dd_lock));
257
258 for (pr = list_head(&dd->dd_props);
259 pr != NULL; pr = list_next(&dd->dd_props, pr)) {
260 if (strcmp(pr->pr_propname, propname) == 0)
261 break;
262 }
263
264 return (pr);
265 }
266
267 static dsl_prop_record_t *
dsl_prop_record_create(dsl_dir_t * dd,const char * propname)268 dsl_prop_record_create(dsl_dir_t *dd, const char *propname)
269 {
270 dsl_prop_record_t *pr;
271
272 ASSERT(MUTEX_HELD(&dd->dd_lock));
273
274 pr = kmem_alloc(sizeof (dsl_prop_record_t), KM_SLEEP);
275 pr->pr_propname = spa_strdup(propname);
276 list_create(&pr->pr_cbs, sizeof (dsl_prop_cb_record_t),
277 offsetof(dsl_prop_cb_record_t, cbr_pr_node));
278 list_insert_head(&dd->dd_props, pr);
279
280 return (pr);
281 }
282
283 void
dsl_prop_init(dsl_dir_t * dd)284 dsl_prop_init(dsl_dir_t *dd)
285 {
286 list_create(&dd->dd_props, sizeof (dsl_prop_record_t),
287 offsetof(dsl_prop_record_t, pr_node));
288 }
289
290 void
dsl_prop_fini(dsl_dir_t * dd)291 dsl_prop_fini(dsl_dir_t *dd)
292 {
293 dsl_prop_record_t *pr;
294
295 while ((pr = list_remove_head(&dd->dd_props)) != NULL) {
296 list_destroy(&pr->pr_cbs);
297 spa_strfree((char *)pr->pr_propname);
298 kmem_free(pr, sizeof (dsl_prop_record_t));
299 }
300 list_destroy(&dd->dd_props);
301 }
302
303 /*
304 * Register interest in the named property. We'll call the callback
305 * once to notify it of the current property value, and again each time
306 * the property changes, until this callback is unregistered.
307 *
308 * Return 0 on success, errno if the prop is not an integer value.
309 */
310 int
dsl_prop_register(dsl_dataset_t * ds,const char * propname,dsl_prop_changed_cb_t * callback,void * cbarg)311 dsl_prop_register(dsl_dataset_t *ds, const char *propname,
312 dsl_prop_changed_cb_t *callback, void *cbarg)
313 {
314 dsl_dir_t *dd = ds->ds_dir;
315 uint64_t value;
316 dsl_prop_record_t *pr;
317 dsl_prop_cb_record_t *cbr;
318 int err;
319 dsl_pool_t *dp __maybe_unused = dd->dd_pool;
320
321 ASSERT(dsl_pool_config_held(dp));
322
323 err = dsl_prop_get_int_ds(ds, propname, &value);
324 if (err != 0)
325 return (err);
326
327 cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
328 cbr->cbr_ds = ds;
329 cbr->cbr_func = callback;
330 cbr->cbr_arg = cbarg;
331
332 mutex_enter(&dd->dd_lock);
333 pr = dsl_prop_record_find(dd, propname);
334 if (pr == NULL)
335 pr = dsl_prop_record_create(dd, propname);
336 cbr->cbr_pr = pr;
337 list_insert_head(&pr->pr_cbs, cbr);
338 list_insert_head(&ds->ds_prop_cbs, cbr);
339 mutex_exit(&dd->dd_lock);
340
341 cbr->cbr_func(cbr->cbr_arg, value);
342 return (0);
343 }
344
345 int
dsl_prop_get(const char * dsname,const char * propname,int intsz,int numints,void * buf,char * setpoint)346 dsl_prop_get(const char *dsname, const char *propname,
347 int intsz, int numints, void *buf, char *setpoint)
348 {
349 objset_t *os;
350 int error;
351
352 error = dmu_objset_hold(dsname, FTAG, &os);
353 if (error != 0)
354 return (error);
355
356 error = dsl_prop_get_ds(dmu_objset_ds(os), propname,
357 intsz, numints, buf, setpoint);
358
359 dmu_objset_rele(os, FTAG);
360 return (error);
361 }
362
363 /*
364 * Get the current property value. It may have changed by the time this
365 * function returns, so it is NOT safe to follow up with
366 * dsl_prop_register() and assume that the value has not changed in
367 * between.
368 *
369 * Return 0 on success, ENOENT if ddname is invalid.
370 */
371 int
dsl_prop_get_integer(const char * ddname,const char * propname,uint64_t * valuep,char * setpoint)372 dsl_prop_get_integer(const char *ddname, const char *propname,
373 uint64_t *valuep, char *setpoint)
374 {
375 return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
376 }
377
378 int
dsl_prop_get_int_ds(dsl_dataset_t * ds,const char * propname,uint64_t * valuep)379 dsl_prop_get_int_ds(dsl_dataset_t *ds, const char *propname,
380 uint64_t *valuep)
381 {
382 return (dsl_prop_get_ds(ds, propname, 8, 1, valuep, NULL));
383 }
384
385 /*
386 * Predict the effective value of the given special property if it were set with
387 * the given value and source. This is not a general purpose function. It exists
388 * only to handle the special requirements of the quota and reservation
389 * properties. The fact that these properties are non-inheritable greatly
390 * simplifies the prediction logic.
391 *
392 * Returns 0 on success, a positive error code on failure, or -1 if called with
393 * a property not handled by this function.
394 */
395 int
dsl_prop_predict(dsl_dir_t * dd,const char * propname,zprop_source_t source,uint64_t value,uint64_t * newvalp)396 dsl_prop_predict(dsl_dir_t *dd, const char *propname,
397 zprop_source_t source, uint64_t value, uint64_t *newvalp)
398 {
399 zfs_prop_t prop = zfs_name_to_prop(propname);
400 objset_t *mos;
401 uint64_t zapobj;
402 uint64_t version;
403 char *recvdstr;
404 int err = 0;
405
406 switch (prop) {
407 case ZFS_PROP_QUOTA:
408 case ZFS_PROP_RESERVATION:
409 case ZFS_PROP_REFQUOTA:
410 case ZFS_PROP_REFRESERVATION:
411 break;
412 default:
413 return (-1);
414 }
415
416 mos = dd->dd_pool->dp_meta_objset;
417 zapobj = dsl_dir_phys(dd)->dd_props_zapobj;
418 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
419
420 version = spa_version(dd->dd_pool->dp_spa);
421 if (version < SPA_VERSION_RECVD_PROPS) {
422 if (source & ZPROP_SRC_NONE)
423 source = ZPROP_SRC_NONE;
424 else if (source & ZPROP_SRC_RECEIVED)
425 source = ZPROP_SRC_LOCAL;
426 }
427
428 switch ((int)source) {
429 case ZPROP_SRC_NONE:
430 /* Revert to the received value, if any. */
431 err = zap_lookup(mos, zapobj, recvdstr, 8, 1, newvalp);
432 if (err == ENOENT)
433 *newvalp = 0;
434 break;
435 case ZPROP_SRC_LOCAL:
436 *newvalp = value;
437 break;
438 case ZPROP_SRC_RECEIVED:
439 /*
440 * If there's no local setting, then the new received value will
441 * be the effective value.
442 */
443 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
444 if (err == ENOENT)
445 *newvalp = value;
446 break;
447 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
448 /*
449 * We're clearing the received value, so the local setting (if
450 * it exists) remains the effective value.
451 */
452 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
453 if (err == ENOENT)
454 *newvalp = 0;
455 break;
456 default:
457 panic("unexpected property source: %d", source);
458 }
459
460 kmem_strfree(recvdstr);
461
462 if (err == ENOENT)
463 return (0);
464
465 return (err);
466 }
467
468 /*
469 * Unregister this callback. Return 0 on success, ENOENT if ddname is
470 * invalid, or ENOMSG if no matching callback registered.
471 *
472 * NOTE: This function is no longer used internally but has been preserved
473 * to prevent breaking external consumers (Lustre, etc).
474 */
475 int
dsl_prop_unregister(dsl_dataset_t * ds,const char * propname,dsl_prop_changed_cb_t * callback,void * cbarg)476 dsl_prop_unregister(dsl_dataset_t *ds, const char *propname,
477 dsl_prop_changed_cb_t *callback, void *cbarg)
478 {
479 dsl_dir_t *dd = ds->ds_dir;
480 dsl_prop_cb_record_t *cbr;
481
482 mutex_enter(&dd->dd_lock);
483 for (cbr = list_head(&ds->ds_prop_cbs);
484 cbr; cbr = list_next(&ds->ds_prop_cbs, cbr)) {
485 if (cbr->cbr_ds == ds &&
486 cbr->cbr_func == callback &&
487 cbr->cbr_arg == cbarg &&
488 strcmp(cbr->cbr_pr->pr_propname, propname) == 0)
489 break;
490 }
491
492 if (cbr == NULL) {
493 mutex_exit(&dd->dd_lock);
494 return (SET_ERROR(ENOMSG));
495 }
496
497 list_remove(&ds->ds_prop_cbs, cbr);
498 list_remove(&cbr->cbr_pr->pr_cbs, cbr);
499 mutex_exit(&dd->dd_lock);
500 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
501
502 return (0);
503 }
504
505 /*
506 * Unregister all callbacks that are registered with the
507 * given callback argument.
508 */
509 void
dsl_prop_unregister_all(dsl_dataset_t * ds,void * cbarg)510 dsl_prop_unregister_all(dsl_dataset_t *ds, void *cbarg)
511 {
512 dsl_prop_cb_record_t *cbr, *next_cbr;
513
514 dsl_dir_t *dd = ds->ds_dir;
515
516 mutex_enter(&dd->dd_lock);
517 next_cbr = list_head(&ds->ds_prop_cbs);
518 while (next_cbr != NULL) {
519 cbr = next_cbr;
520 next_cbr = list_next(&ds->ds_prop_cbs, cbr);
521 if (cbr->cbr_arg == cbarg) {
522 list_remove(&ds->ds_prop_cbs, cbr);
523 list_remove(&cbr->cbr_pr->pr_cbs, cbr);
524 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
525 }
526 }
527 mutex_exit(&dd->dd_lock);
528 }
529
530 boolean_t
dsl_prop_hascb(dsl_dataset_t * ds)531 dsl_prop_hascb(dsl_dataset_t *ds)
532 {
533 return (!list_is_empty(&ds->ds_prop_cbs));
534 }
535
536 static int
dsl_prop_notify_all_cb(dsl_pool_t * dp,dsl_dataset_t * ds,void * arg)537 dsl_prop_notify_all_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
538 {
539 (void) arg;
540 dsl_dir_t *dd = ds->ds_dir;
541 dsl_prop_record_t *pr;
542 dsl_prop_cb_record_t *cbr;
543
544 mutex_enter(&dd->dd_lock);
545 for (pr = list_head(&dd->dd_props);
546 pr; pr = list_next(&dd->dd_props, pr)) {
547 for (cbr = list_head(&pr->pr_cbs); cbr;
548 cbr = list_next(&pr->pr_cbs, cbr)) {
549 uint64_t value;
550
551 /*
552 * Callback entries do not have holds on their
553 * datasets so that datasets with registered
554 * callbacks are still eligible for eviction.
555 * Unlike operations to update properties on a
556 * single dataset, we are performing a recursive
557 * descent of related head datasets. The caller
558 * of this function only has a dataset hold on
559 * the passed in head dataset, not the snapshots
560 * associated with this dataset. Without a hold,
561 * the dataset pointer within callback records
562 * for snapshots can be invalidated by eviction
563 * at any time.
564 *
565 * Use dsl_dataset_try_add_ref() to verify
566 * that the dataset for a snapshot has not
567 * begun eviction processing and to prevent
568 * eviction from occurring for the duration of
569 * the callback. If the hold attempt fails,
570 * this object is already being evicted and the
571 * callback can be safely ignored.
572 */
573 if (ds != cbr->cbr_ds &&
574 !dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
575 continue;
576
577 if (dsl_prop_get_ds(cbr->cbr_ds,
578 cbr->cbr_pr->pr_propname, sizeof (value), 1,
579 &value, NULL) == 0)
580 cbr->cbr_func(cbr->cbr_arg, value);
581
582 if (ds != cbr->cbr_ds)
583 dsl_dataset_rele(cbr->cbr_ds, FTAG);
584 }
585 }
586 mutex_exit(&dd->dd_lock);
587
588 return (0);
589 }
590
591 /*
592 * Update all property values for ddobj & its descendants. This is used
593 * when renaming the dir.
594 */
595 void
dsl_prop_notify_all(dsl_dir_t * dd)596 dsl_prop_notify_all(dsl_dir_t *dd)
597 {
598 dsl_pool_t *dp = dd->dd_pool;
599 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
600 (void) dmu_objset_find_dp(dp, dd->dd_object, dsl_prop_notify_all_cb,
601 NULL, DS_FIND_CHILDREN);
602 }
603
604 static void
dsl_prop_changed_notify(dsl_pool_t * dp,uint64_t ddobj,const char * propname,uint64_t value,int first)605 dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
606 const char *propname, uint64_t value, int first)
607 {
608 dsl_dir_t *dd;
609 dsl_prop_record_t *pr;
610 dsl_prop_cb_record_t *cbr;
611 objset_t *mos = dp->dp_meta_objset;
612 zap_cursor_t zc;
613 zap_attribute_t *za;
614 int err;
615
616 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
617 err = dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd);
618 if (err)
619 return;
620
621 if (!first) {
622 /*
623 * If the prop is set here, then this change is not
624 * being inherited here or below; stop the recursion.
625 */
626 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
627 propname);
628 if (err == 0) {
629 dsl_dir_rele(dd, FTAG);
630 return;
631 }
632 ASSERT3U(err, ==, ENOENT);
633 }
634
635 mutex_enter(&dd->dd_lock);
636 pr = dsl_prop_record_find(dd, propname);
637 if (pr != NULL) {
638 for (cbr = list_head(&pr->pr_cbs); cbr;
639 cbr = list_next(&pr->pr_cbs, cbr)) {
640 uint64_t propobj;
641
642 /*
643 * cbr->cbr_ds may be invalidated due to eviction,
644 * requiring the use of dsl_dataset_try_add_ref().
645 * See comment block in dsl_prop_notify_all_cb()
646 * for details.
647 */
648 if (!dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
649 continue;
650
651 propobj = dsl_dataset_phys(cbr->cbr_ds)->ds_props_obj;
652
653 /*
654 * If the property is not set on this ds, then it is
655 * inherited here; call the callback.
656 */
657 if (propobj == 0 ||
658 zap_contains(mos, propobj, propname) != 0)
659 cbr->cbr_func(cbr->cbr_arg, value);
660
661 dsl_dataset_rele(cbr->cbr_ds, FTAG);
662 }
663 }
664 mutex_exit(&dd->dd_lock);
665
666 za = zap_attribute_alloc();
667 for (zap_cursor_init(&zc, mos,
668 dsl_dir_phys(dd)->dd_child_dir_zapobj);
669 zap_cursor_retrieve(&zc, za) == 0;
670 zap_cursor_advance(&zc)) {
671 dsl_prop_changed_notify(dp, za->za_first_integer,
672 propname, value, FALSE);
673 }
674 zap_attribute_free(za);
675 zap_cursor_fini(&zc);
676 dsl_dir_rele(dd, FTAG);
677 }
678
679
680 /*
681 * For newer values in zfs index type properties, we add a new key
682 * propname$iuv (iuv = Ignore Unknown Values) to the properties zap object
683 * to store the new property value and store the default value in the
684 * existing prop key. So that the propname$iuv key is ignored by the older zfs
685 * versions and the default property value from the existing prop key is
686 * used.
687 */
688 static void
dsl_prop_set_iuv(objset_t * mos,uint64_t zapobj,const char * propname,int intsz,int numints,const void * value,dmu_tx_t * tx)689 dsl_prop_set_iuv(objset_t *mos, uint64_t zapobj, const char *propname,
690 int intsz, int numints, const void *value, dmu_tx_t *tx)
691 {
692 char *iuvstr = kmem_asprintf("%s%s", propname, ZPROP_IUV_SUFFIX);
693 boolean_t iuv = B_FALSE;
694 zfs_prop_t prop = zfs_name_to_prop(propname);
695
696 switch (prop) {
697 case ZFS_PROP_REDUNDANT_METADATA:
698 if (*(uint64_t *)value == ZFS_REDUNDANT_METADATA_SOME ||
699 *(uint64_t *)value == ZFS_REDUNDANT_METADATA_NONE)
700 iuv = B_TRUE;
701 break;
702 case ZFS_PROP_SNAPDIR:
703 if (*(uint64_t *)value == ZFS_SNAPDIR_DISABLED)
704 iuv = B_TRUE;
705 break;
706 default:
707 break;
708 }
709
710 if (iuv) {
711 VERIFY0(zap_update(mos, zapobj, iuvstr, intsz, numints,
712 value, tx));
713 uint64_t val = zfs_prop_default_numeric(prop);
714 VERIFY0(zap_update(mos, zapobj, propname, intsz, numints,
715 &val, tx));
716 } else {
717 zap_remove(mos, zapobj, iuvstr, tx);
718 }
719 kmem_strfree(iuvstr);
720 }
721
722 void
dsl_prop_set_sync_impl(dsl_dataset_t * ds,const char * propname,zprop_source_t source,int intsz,int numints,const void * value,dmu_tx_t * tx)723 dsl_prop_set_sync_impl(dsl_dataset_t *ds, const char *propname,
724 zprop_source_t source, int intsz, int numints, const void *value,
725 dmu_tx_t *tx)
726 {
727 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
728 uint64_t zapobj, intval, dummy, count;
729 int isint;
730 char valbuf[32];
731 const char *valstr = NULL;
732 char *inheritstr;
733 char *recvdstr;
734 char *iuvstr;
735 char *tbuf = NULL;
736 int err;
737 uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
738
739 isint = (dodefault(zfs_name_to_prop(propname), 8, 1, &intval) == 0);
740
741 if (ds->ds_is_snapshot) {
742 ASSERT(version >= SPA_VERSION_SNAP_PROPS);
743 if (dsl_dataset_phys(ds)->ds_props_obj == 0 &&
744 (source & ZPROP_SRC_NONE) == 0) {
745 dmu_buf_will_dirty(ds->ds_dbuf, tx);
746 dsl_dataset_phys(ds)->ds_props_obj =
747 zap_create(mos,
748 DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
749 }
750 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
751 } else {
752 zapobj = dsl_dir_phys(ds->ds_dir)->dd_props_zapobj;
753 }
754
755 /* If we are removing objects from a non-existent ZAP just return */
756 if (zapobj == 0)
757 return;
758
759 if (version < SPA_VERSION_RECVD_PROPS) {
760 if (source & ZPROP_SRC_NONE)
761 source = ZPROP_SRC_NONE;
762 else if (source & ZPROP_SRC_RECEIVED)
763 source = ZPROP_SRC_LOCAL;
764 }
765
766 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
767 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
768 iuvstr = kmem_asprintf("%s%s", propname, ZPROP_IUV_SUFFIX);
769
770 switch ((int)source) {
771 case ZPROP_SRC_NONE:
772 /*
773 * revert to received value, if any (inherit -S)
774 * - remove propname
775 * - remove propname$inherit
776 */
777 err = zap_remove(mos, zapobj, propname, tx);
778 ASSERT(err == 0 || err == ENOENT);
779 err = zap_remove(mos, zapobj, inheritstr, tx);
780 ASSERT(err == 0 || err == ENOENT);
781 break;
782 case ZPROP_SRC_LOCAL:
783 /*
784 * remove propname$inherit
785 * set propname -> value
786 * set propname$iuv -> new property value
787 */
788 err = zap_remove(mos, zapobj, inheritstr, tx);
789 ASSERT(err == 0 || err == ENOENT);
790 VERIFY0(zap_update(mos, zapobj, propname,
791 intsz, numints, value, tx));
792 (void) dsl_prop_set_iuv(mos, zapobj, propname, intsz,
793 numints, value, tx);
794 break;
795 case ZPROP_SRC_INHERITED:
796 /*
797 * explicitly inherit
798 * - remove propname
799 * - set propname$inherit
800 */
801 err = zap_remove(mos, zapobj, propname, tx);
802 ASSERT(err == 0 || err == ENOENT);
803 err = zap_remove(mos, zapobj, iuvstr, tx);
804 ASSERT(err == 0 || err == ENOENT);
805 if (version >= SPA_VERSION_RECVD_PROPS &&
806 dsl_prop_get_int_ds(ds, ZPROP_HAS_RECVD, &dummy) == 0) {
807 dummy = 0;
808 VERIFY0(zap_update(mos, zapobj, inheritstr,
809 8, 1, &dummy, tx));
810 }
811 break;
812 case ZPROP_SRC_RECEIVED:
813 /*
814 * set propname$recvd -> value
815 */
816 err = zap_update(mos, zapobj, recvdstr,
817 intsz, numints, value, tx);
818 ASSERT(err == 0);
819 break;
820 case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
821 /*
822 * clear local and received settings
823 * - remove propname
824 * - remove propname$inherit
825 * - remove propname$recvd
826 */
827 err = zap_remove(mos, zapobj, propname, tx);
828 ASSERT(err == 0 || err == ENOENT);
829 err = zap_remove(mos, zapobj, inheritstr, tx);
830 ASSERT(err == 0 || err == ENOENT);
831 zfs_fallthrough;
832 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
833 /*
834 * remove propname$recvd
835 */
836 err = zap_remove(mos, zapobj, recvdstr, tx);
837 ASSERT(err == 0 || err == ENOENT);
838 break;
839 default:
840 cmn_err(CE_PANIC, "unexpected property source: %d", source);
841 }
842
843 kmem_strfree(inheritstr);
844 kmem_strfree(recvdstr);
845 kmem_strfree(iuvstr);
846
847 /*
848 * If we are left with an empty snap zap we can destroy it.
849 * This will prevent unnecessary calls to zap_lookup() in
850 * the "zfs list" and "zfs get" code paths.
851 */
852 if (ds->ds_is_snapshot &&
853 zap_count(mos, zapobj, &count) == 0 && count == 0) {
854 dmu_buf_will_dirty(ds->ds_dbuf, tx);
855 dsl_dataset_phys(ds)->ds_props_obj = 0;
856 zap_destroy(mos, zapobj, tx);
857 }
858
859 if (isint) {
860 VERIFY0(dsl_prop_get_int_ds(ds, propname, &intval));
861
862 if (ds->ds_is_snapshot) {
863 dsl_prop_cb_record_t *cbr;
864 /*
865 * It's a snapshot; nothing can inherit this
866 * property, so just look for callbacks on this
867 * ds here.
868 */
869 mutex_enter(&ds->ds_dir->dd_lock);
870 for (cbr = list_head(&ds->ds_prop_cbs); cbr;
871 cbr = list_next(&ds->ds_prop_cbs, cbr)) {
872 if (strcmp(cbr->cbr_pr->pr_propname,
873 propname) == 0)
874 cbr->cbr_func(cbr->cbr_arg, intval);
875 }
876 mutex_exit(&ds->ds_dir->dd_lock);
877 } else {
878 dsl_prop_changed_notify(ds->ds_dir->dd_pool,
879 ds->ds_dir->dd_object, propname, intval, TRUE);
880 }
881
882 (void) snprintf(valbuf, sizeof (valbuf),
883 "%lld", (longlong_t)intval);
884 valstr = valbuf;
885 } else {
886 if (source == ZPROP_SRC_LOCAL) {
887 valstr = value;
888 } else {
889 tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
890 if (dsl_prop_get_ds(ds, propname, 1,
891 ZAP_MAXVALUELEN, tbuf, NULL) == 0)
892 valstr = tbuf;
893 }
894 }
895
896 spa_history_log_internal_ds(ds, (source == ZPROP_SRC_NONE ||
897 source == ZPROP_SRC_INHERITED) ? "inherit" : "set", tx,
898 "%s=%s", propname, (valstr == NULL ? "" : valstr));
899
900 if (tbuf != NULL)
901 kmem_free(tbuf, ZAP_MAXVALUELEN);
902 }
903
904 int
dsl_prop_set_int(const char * dsname,const char * propname,zprop_source_t source,uint64_t value)905 dsl_prop_set_int(const char *dsname, const char *propname,
906 zprop_source_t source, uint64_t value)
907 {
908 nvlist_t *nvl = fnvlist_alloc();
909 int error;
910
911 fnvlist_add_uint64(nvl, propname, value);
912 error = dsl_props_set(dsname, source, nvl);
913 fnvlist_free(nvl);
914 return (error);
915 }
916
917 int
dsl_prop_set_string(const char * dsname,const char * propname,zprop_source_t source,const char * value)918 dsl_prop_set_string(const char *dsname, const char *propname,
919 zprop_source_t source, const char *value)
920 {
921 nvlist_t *nvl = fnvlist_alloc();
922 int error;
923
924 fnvlist_add_string(nvl, propname, value);
925 error = dsl_props_set(dsname, source, nvl);
926 fnvlist_free(nvl);
927 return (error);
928 }
929
930 int
dsl_prop_inherit(const char * dsname,const char * propname,zprop_source_t source)931 dsl_prop_inherit(const char *dsname, const char *propname,
932 zprop_source_t source)
933 {
934 nvlist_t *nvl = fnvlist_alloc();
935 int error;
936
937 fnvlist_add_boolean(nvl, propname);
938 error = dsl_props_set(dsname, source, nvl);
939 fnvlist_free(nvl);
940 return (error);
941 }
942
943 int
dsl_props_set_check(void * arg,dmu_tx_t * tx)944 dsl_props_set_check(void *arg, dmu_tx_t *tx)
945 {
946 dsl_props_set_arg_t *dpsa = arg;
947 dsl_pool_t *dp = dmu_tx_pool(tx);
948 dsl_dataset_t *ds;
949 uint64_t version;
950 nvpair_t *elem = NULL;
951 int err;
952
953 err = dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds);
954 if (err != 0)
955 return (err);
956
957 version = spa_version(ds->ds_dir->dd_pool->dp_spa);
958 while ((elem = nvlist_next_nvpair(dpsa->dpsa_props, elem)) != NULL) {
959 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
960 dsl_dataset_rele(ds, FTAG);
961 return (SET_ERROR(ENAMETOOLONG));
962 }
963 if (nvpair_type(elem) == DATA_TYPE_STRING) {
964 const char *valstr = fnvpair_value_string(elem);
965 if (strlen(valstr) >= (version <
966 SPA_VERSION_STMF_PROP ?
967 ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
968 dsl_dataset_rele(ds, FTAG);
969 return (SET_ERROR(E2BIG));
970 }
971 }
972 }
973
974 if (ds->ds_is_snapshot && version < SPA_VERSION_SNAP_PROPS) {
975 dsl_dataset_rele(ds, FTAG);
976 return (SET_ERROR(ENOTSUP));
977 }
978 dsl_dataset_rele(ds, FTAG);
979 return (0);
980 }
981
982 void
dsl_props_set_sync_impl(dsl_dataset_t * ds,zprop_source_t source,nvlist_t * props,dmu_tx_t * tx)983 dsl_props_set_sync_impl(dsl_dataset_t *ds, zprop_source_t source,
984 nvlist_t *props, dmu_tx_t *tx)
985 {
986 nvpair_t *elem = NULL;
987
988 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
989 nvpair_t *pair = elem;
990 const char *name = nvpair_name(pair);
991
992 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
993 /*
994 * This usually happens when we reuse the nvlist_t data
995 * returned by the counterpart dsl_prop_get_all_impl().
996 * For instance we do this to restore the original
997 * received properties when an error occurs in the
998 * zfs_ioc_recv() codepath.
999 */
1000 nvlist_t *attrs = fnvpair_value_nvlist(pair);
1001 pair = fnvlist_lookup_nvpair(attrs, ZPROP_VALUE);
1002 }
1003
1004 if (nvpair_type(pair) == DATA_TYPE_STRING) {
1005 const char *value = fnvpair_value_string(pair);
1006 dsl_prop_set_sync_impl(ds, name,
1007 source, 1, strlen(value) + 1, value, tx);
1008 } else if (nvpair_type(pair) == DATA_TYPE_UINT64) {
1009 uint64_t intval = fnvpair_value_uint64(pair);
1010 dsl_prop_set_sync_impl(ds, name,
1011 source, sizeof (intval), 1, &intval, tx);
1012 } else if (nvpair_type(pair) == DATA_TYPE_BOOLEAN) {
1013 dsl_prop_set_sync_impl(ds, name,
1014 source, 0, 0, NULL, tx);
1015 } else {
1016 panic("invalid nvpair type");
1017 }
1018 }
1019 }
1020
1021 void
dsl_props_set_sync(void * arg,dmu_tx_t * tx)1022 dsl_props_set_sync(void *arg, dmu_tx_t *tx)
1023 {
1024 dsl_props_set_arg_t *dpsa = arg;
1025 dsl_pool_t *dp = dmu_tx_pool(tx);
1026 dsl_dataset_t *ds;
1027
1028 VERIFY0(dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds));
1029 dsl_props_set_sync_impl(ds, dpsa->dpsa_source, dpsa->dpsa_props, tx);
1030 dsl_dataset_rele(ds, FTAG);
1031 }
1032
1033 /*
1034 * All-or-nothing; if any prop can't be set, nothing will be modified.
1035 */
1036 int
dsl_props_set(const char * dsname,zprop_source_t source,nvlist_t * props)1037 dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
1038 {
1039 dsl_props_set_arg_t dpsa;
1040 int nblks = 0;
1041
1042 dpsa.dpsa_dsname = dsname;
1043 dpsa.dpsa_source = source;
1044 dpsa.dpsa_props = props;
1045
1046 /*
1047 * If the source includes NONE, then we will only be removing entries
1048 * from the ZAP object. In that case don't check for ENOSPC.
1049 */
1050 if ((source & ZPROP_SRC_NONE) == 0)
1051 nblks = 2 * fnvlist_num_pairs(props);
1052
1053 return (dsl_sync_task(dsname, dsl_props_set_check, dsl_props_set_sync,
1054 &dpsa, nblks, ZFS_SPACE_CHECK_RESERVED));
1055 }
1056
1057 typedef enum dsl_prop_getflags {
1058 DSL_PROP_GET_INHERITING = 0x1, /* searching parent of target ds */
1059 DSL_PROP_GET_SNAPSHOT = 0x2, /* snapshot dataset */
1060 DSL_PROP_GET_LOCAL = 0x4, /* local properties */
1061 DSL_PROP_GET_RECEIVED = 0x8, /* received properties */
1062 } dsl_prop_getflags_t;
1063
1064 static int
dsl_prop_get_all_impl(objset_t * mos,uint64_t propobj,const char * setpoint,dsl_prop_getflags_t flags,nvlist_t * nv)1065 dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
1066 const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
1067 {
1068 zap_cursor_t zc;
1069 zap_attribute_t *za = zap_attribute_alloc();
1070 int err = 0;
1071
1072 for (zap_cursor_init(&zc, mos, propobj);
1073 (err = zap_cursor_retrieve(&zc, za)) == 0;
1074 zap_cursor_advance(&zc)) {
1075 nvlist_t *propval;
1076 zfs_prop_t prop;
1077 char buf[ZAP_MAXNAMELEN];
1078 char *valstr;
1079 const char *suffix;
1080 const char *propname;
1081 const char *source;
1082
1083 suffix = strchr(za->za_name, '$');
1084
1085 if (suffix == NULL) {
1086 /*
1087 * Skip local properties if we only want received
1088 * properties.
1089 */
1090 if (flags & DSL_PROP_GET_RECEIVED)
1091 continue;
1092
1093 propname = za->za_name;
1094 source = setpoint;
1095
1096 /* Skip if iuv entries are preset. */
1097 valstr = kmem_asprintf("%s%s", propname,
1098 ZPROP_IUV_SUFFIX);
1099 err = zap_contains(mos, propobj, valstr);
1100 kmem_strfree(valstr);
1101 if (err == 0)
1102 continue;
1103 } else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
1104 /* Skip explicitly inherited entries. */
1105 continue;
1106 } else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
1107 if (flags & DSL_PROP_GET_LOCAL)
1108 continue;
1109
1110 (void) strlcpy(buf, za->za_name,
1111 MIN(sizeof (buf), suffix - za->za_name + 1));
1112 propname = buf;
1113
1114 if (!(flags & DSL_PROP_GET_RECEIVED)) {
1115 /* Skip if locally overridden. */
1116 err = zap_contains(mos, propobj, propname);
1117 if (err == 0)
1118 continue;
1119 if (err != ENOENT)
1120 break;
1121
1122 /* Skip if explicitly inherited. */
1123 valstr = kmem_asprintf("%s%s", propname,
1124 ZPROP_INHERIT_SUFFIX);
1125 err = zap_contains(mos, propobj, valstr);
1126 kmem_strfree(valstr);
1127 if (err == 0)
1128 continue;
1129 if (err != ENOENT)
1130 break;
1131 }
1132
1133 source = ((flags & DSL_PROP_GET_INHERITING) ?
1134 setpoint : ZPROP_SOURCE_VAL_RECVD);
1135 } else if (strcmp(suffix, ZPROP_IUV_SUFFIX) == 0) {
1136 (void) strlcpy(buf, za->za_name,
1137 MIN(sizeof (buf), suffix - za->za_name + 1));
1138 propname = buf;
1139 source = setpoint;
1140 prop = zfs_name_to_prop(propname);
1141
1142 if (dsl_prop_known_index(prop,
1143 za->za_first_integer) != 1)
1144 continue;
1145 } else {
1146 /*
1147 * For backward compatibility, skip suffixes we don't
1148 * recognize.
1149 */
1150 continue;
1151 }
1152
1153 prop = zfs_name_to_prop(propname);
1154
1155 /* Skip non-inheritable properties. */
1156 if ((flags & DSL_PROP_GET_INHERITING) &&
1157 prop != ZPROP_USERPROP && !zfs_prop_inheritable(prop))
1158 continue;
1159
1160 /* Skip properties not valid for this type. */
1161 if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_USERPROP &&
1162 !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT, B_FALSE))
1163 continue;
1164
1165 /* Skip properties already defined. */
1166 if (nvlist_exists(nv, propname))
1167 continue;
1168
1169 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1170 if (za->za_integer_length == 1) {
1171 /*
1172 * String property
1173 */
1174 char *tmp = kmem_alloc(za->za_num_integers,
1175 KM_SLEEP);
1176 err = zap_lookup(mos, propobj,
1177 za->za_name, 1, za->za_num_integers, tmp);
1178 if (err != 0) {
1179 kmem_free(tmp, za->za_num_integers);
1180 break;
1181 }
1182 VERIFY(nvlist_add_string(propval, ZPROP_VALUE,
1183 tmp) == 0);
1184 kmem_free(tmp, za->za_num_integers);
1185 } else {
1186 /*
1187 * Integer property
1188 */
1189 ASSERT(za->za_integer_length == 8);
1190 (void) nvlist_add_uint64(propval, ZPROP_VALUE,
1191 za->za_first_integer);
1192 }
1193
1194 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, source) == 0);
1195 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1196 nvlist_free(propval);
1197 }
1198 zap_cursor_fini(&zc);
1199 zap_attribute_free(za);
1200 if (err == ENOENT)
1201 err = 0;
1202 return (err);
1203 }
1204
1205 /*
1206 * Iterate over all properties for this dataset and return them in an nvlist.
1207 */
1208 static int
dsl_prop_get_all_ds(dsl_dataset_t * ds,nvlist_t ** nvp,dsl_prop_getflags_t flags)1209 dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
1210 dsl_prop_getflags_t flags)
1211 {
1212 dsl_dir_t *dd = ds->ds_dir;
1213 dsl_pool_t *dp = dd->dd_pool;
1214 objset_t *mos = dp->dp_meta_objset;
1215 int err = 0;
1216 char setpoint[ZFS_MAX_DATASET_NAME_LEN];
1217
1218 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1219
1220 if (ds->ds_is_snapshot)
1221 flags |= DSL_PROP_GET_SNAPSHOT;
1222
1223 ASSERT(dsl_pool_config_held(dp));
1224
1225 if (dsl_dataset_phys(ds)->ds_props_obj != 0) {
1226 ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
1227 dsl_dataset_name(ds, setpoint);
1228 err = dsl_prop_get_all_impl(mos,
1229 dsl_dataset_phys(ds)->ds_props_obj, setpoint, flags, *nvp);
1230 if (err)
1231 goto out;
1232 }
1233
1234 for (; dd != NULL; dd = dd->dd_parent) {
1235 if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
1236 if (flags & (DSL_PROP_GET_LOCAL |
1237 DSL_PROP_GET_RECEIVED))
1238 break;
1239 flags |= DSL_PROP_GET_INHERITING;
1240 }
1241 dsl_dir_name(dd, setpoint);
1242 err = dsl_prop_get_all_impl(mos,
1243 dsl_dir_phys(dd)->dd_props_zapobj, setpoint, flags, *nvp);
1244 if (err)
1245 break;
1246 }
1247
1248 out:
1249 if (err) {
1250 nvlist_free(*nvp);
1251 *nvp = NULL;
1252 }
1253 return (err);
1254 }
1255
1256 boolean_t
dsl_prop_get_hasrecvd(const char * dsname)1257 dsl_prop_get_hasrecvd(const char *dsname)
1258 {
1259 uint64_t dummy;
1260
1261 return (0 ==
1262 dsl_prop_get_integer(dsname, ZPROP_HAS_RECVD, &dummy, NULL));
1263 }
1264
1265 static int
dsl_prop_set_hasrecvd_impl(const char * dsname,zprop_source_t source)1266 dsl_prop_set_hasrecvd_impl(const char *dsname, zprop_source_t source)
1267 {
1268 uint64_t version;
1269 spa_t *spa;
1270 int error = 0;
1271
1272 VERIFY0(spa_open(dsname, &spa, FTAG));
1273 version = spa_version(spa);
1274 spa_close(spa, FTAG);
1275
1276 if (version >= SPA_VERSION_RECVD_PROPS)
1277 error = dsl_prop_set_int(dsname, ZPROP_HAS_RECVD, source, 0);
1278 return (error);
1279 }
1280
1281 /*
1282 * Call after successfully receiving properties to ensure that only the first
1283 * receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
1284 */
1285 int
dsl_prop_set_hasrecvd(const char * dsname)1286 dsl_prop_set_hasrecvd(const char *dsname)
1287 {
1288 int error = 0;
1289 if (!dsl_prop_get_hasrecvd(dsname))
1290 error = dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_LOCAL);
1291 return (error);
1292 }
1293
1294 void
dsl_prop_unset_hasrecvd(const char * dsname)1295 dsl_prop_unset_hasrecvd(const char *dsname)
1296 {
1297 VERIFY0(dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_NONE));
1298 }
1299
1300 int
dsl_prop_get_all(objset_t * os,nvlist_t ** nvp)1301 dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
1302 {
1303 return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
1304 }
1305
1306 int
dsl_prop_get_received(const char * dsname,nvlist_t ** nvp)1307 dsl_prop_get_received(const char *dsname, nvlist_t **nvp)
1308 {
1309 objset_t *os;
1310 int error;
1311
1312 /*
1313 * Received properties are not distinguishable from local properties
1314 * until the dataset has received properties on or after
1315 * SPA_VERSION_RECVD_PROPS.
1316 */
1317 dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(dsname) ?
1318 DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
1319
1320 error = dmu_objset_hold(dsname, FTAG, &os);
1321 if (error != 0)
1322 return (error);
1323 error = dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags);
1324 dmu_objset_rele(os, FTAG);
1325 return (error);
1326 }
1327
1328 void
dsl_prop_nvlist_add_uint64(nvlist_t * nv,zfs_prop_t prop,uint64_t value)1329 dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
1330 {
1331 nvlist_t *propval;
1332 const char *propname = zfs_prop_to_name(prop);
1333 uint64_t default_value;
1334
1335 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1336 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1337 return;
1338 }
1339
1340 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1341 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1342 /* Indicate the default source if we can. */
1343 if (dodefault(prop, 8, 1, &default_value) == 0 &&
1344 value == default_value) {
1345 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, "") == 0);
1346 }
1347 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1348 nvlist_free(propval);
1349 }
1350
1351 void
dsl_prop_nvlist_add_string(nvlist_t * nv,zfs_prop_t prop,const char * value)1352 dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
1353 {
1354 nvlist_t *propval;
1355 const char *propname = zfs_prop_to_name(prop);
1356
1357 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1358 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1359 return;
1360 }
1361
1362 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1363 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1364 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1365 nvlist_free(propval);
1366 }
1367
1368 #if defined(_KERNEL)
1369 EXPORT_SYMBOL(dsl_prop_register);
1370 EXPORT_SYMBOL(dsl_prop_unregister);
1371 EXPORT_SYMBOL(dsl_prop_unregister_all);
1372 EXPORT_SYMBOL(dsl_prop_get);
1373 EXPORT_SYMBOL(dsl_prop_get_integer);
1374 EXPORT_SYMBOL(dsl_prop_get_all);
1375 EXPORT_SYMBOL(dsl_prop_get_received);
1376 EXPORT_SYMBOL(dsl_prop_get_ds);
1377 EXPORT_SYMBOL(dsl_prop_get_int_ds);
1378 EXPORT_SYMBOL(dsl_prop_get_dd);
1379 EXPORT_SYMBOL(dsl_props_set);
1380 EXPORT_SYMBOL(dsl_prop_set_int);
1381 EXPORT_SYMBOL(dsl_prop_set_string);
1382 EXPORT_SYMBOL(dsl_prop_inherit);
1383 EXPORT_SYMBOL(dsl_prop_predict);
1384 EXPORT_SYMBOL(dsl_prop_nvlist_add_uint64);
1385 EXPORT_SYMBOL(dsl_prop_nvlist_add_string);
1386 #endif
1387