1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * This file and its contents are supplied under the terms of the
4 * Common Development and Distribution License ("CDDL"), version 1.0.
5 * You may only use this file in accordance with the terms of version
6 * 1.0 of the CDDL.
7 *
8 * A full copy of the text of the CDDL should have accompanied this
9 * source. A copy of the CDDL is also available via the Internet at
10 * https://opensource.org/license/CDDL-1.0.
11 */
12 /*
13 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
14 * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
15 * Copyright (c) 2013 Martin Matuska. All rights reserved.
16 * Copyright 2019 Joyent, Inc.
17 * Copyright (c) 2022 Hewlett Packard Enterprise Development LP.
18 */
19
20 #include <sys/zfs_context.h>
21 #include <sys/dmu.h>
22 #include <sys/dmu_objset.h>
23 #include <sys/dmu_tx.h>
24 #include <sys/dsl_dataset.h>
25 #include <sys/dsl_dir.h>
26 #include <sys/dsl_prop.h>
27 #include <sys/dsl_synctask.h>
28 #include <sys/spa.h>
29 #include <sys/zap.h>
30 #include <sys/fs/zfs.h>
31
32 #include "zfs_prop.h"
33
34 #define ZPROP_INHERIT_SUFFIX "$inherit"
35 #define ZPROP_RECVD_SUFFIX "$recvd"
36 #define ZPROP_IUV_SUFFIX "$iuv"
37
38 static int
dodefault(zfs_prop_t prop,int intsz,int numints,void * buf)39 dodefault(zfs_prop_t prop, int intsz, int numints, void *buf)
40 {
41 /*
42 * The setonce properties are read-only, BUT they still
43 * have a default value that can be used as the initial
44 * value.
45 */
46 if (prop == ZPROP_INVAL ||
47 (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
48 return (SET_ERROR(ENOENT));
49
50 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
51 if (intsz != 1)
52 return (SET_ERROR(EOVERFLOW));
53 (void) strlcpy(buf, zfs_prop_default_string(prop),
54 numints);
55 } else {
56 if (intsz != 8 || numints < 1)
57 return (SET_ERROR(EOVERFLOW));
58
59 *(uint64_t *)buf = zfs_prop_default_numeric(prop);
60 }
61
62 return (0);
63 }
64
65 static int
dsl_prop_known_index(zfs_prop_t prop,uint64_t value)66 dsl_prop_known_index(zfs_prop_t prop, uint64_t value)
67 {
68 const char *str = NULL;
69 if (prop != ZPROP_CONT && prop != ZPROP_INVAL &&
70 zfs_prop_get_type(prop) == PROP_TYPE_INDEX)
71 return (!zfs_prop_index_to_string(prop, value, &str));
72
73 return (-1);
74 }
75
76 int
dsl_prop_get_dd(dsl_dir_t * dd,const char * propname,int intsz,int numints,void * buf,char * setpoint,boolean_t snapshot)77 dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
78 int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
79 {
80 int err;
81 dsl_dir_t *target = dd;
82 objset_t *mos = dd->dd_pool->dp_meta_objset;
83 zfs_prop_t prop;
84 boolean_t inheritable;
85 boolean_t inheriting = B_FALSE;
86 char *inheritstr;
87 char *recvdstr;
88 char *iuvstr;
89
90 ASSERT(dsl_pool_config_held(dd->dd_pool));
91
92 if (setpoint)
93 setpoint[0] = '\0';
94
95 prop = zfs_name_to_prop(propname);
96 inheritable = (prop == ZPROP_USERPROP || zfs_prop_inheritable(prop));
97 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
98 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
99 iuvstr = kmem_asprintf("%s%s", propname, ZPROP_IUV_SUFFIX);
100
101 /*
102 * Note: dd may become NULL, therefore we shouldn't dereference it
103 * after this loop.
104 */
105 for (; dd != NULL; dd = dd->dd_parent) {
106 if (dd != target || snapshot) {
107 if (!inheritable) {
108 err = SET_ERROR(ENOENT);
109 break;
110 }
111 inheriting = B_TRUE;
112 }
113
114 /* Check for a iuv value. */
115 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
116 iuvstr, intsz, numints, buf);
117 if (err == 0 && dsl_prop_known_index(prop,
118 *(uint64_t *)buf) != 1)
119 err = ENOENT;
120 if (err != ENOENT) {
121 if (setpoint != NULL && err == 0)
122 dsl_dir_name(dd, setpoint);
123 break;
124 }
125
126 /* Check for a local value. */
127 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
128 propname, intsz, numints, buf);
129 if (err != ENOENT) {
130 if (setpoint != NULL && err == 0)
131 dsl_dir_name(dd, setpoint);
132 break;
133 }
134
135 /*
136 * Skip the check for a received value if there is an explicit
137 * inheritance entry.
138 */
139 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
140 inheritstr);
141 if (err != 0 && err != ENOENT)
142 break;
143
144 if (err == ENOENT) {
145 /* Check for a received value. */
146 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
147 recvdstr, intsz, numints, buf);
148 if (err != ENOENT) {
149 if (setpoint != NULL && err == 0) {
150 if (inheriting) {
151 dsl_dir_name(dd, setpoint);
152 } else {
153 (void) strlcpy(setpoint,
154 ZPROP_SOURCE_VAL_RECVD,
155 MAXNAMELEN);
156 }
157 }
158 break;
159 }
160 }
161
162 /*
163 * If we found an explicit inheritance entry, err is zero even
164 * though we haven't yet found the value, so reinitializing err
165 * at the end of the loop (instead of at the beginning) ensures
166 * that err has a valid post-loop value.
167 */
168 err = SET_ERROR(ENOENT);
169 }
170
171 if (err == ENOENT)
172 err = dodefault(prop, intsz, numints, buf);
173
174 kmem_strfree(inheritstr);
175 kmem_strfree(recvdstr);
176 kmem_strfree(iuvstr);
177
178 return (err);
179 }
180
181 int
dsl_prop_get_ds(dsl_dataset_t * ds,const char * propname,int intsz,int numints,void * buf,char * setpoint)182 dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
183 int intsz, int numints, void *buf, char *setpoint)
184 {
185 zfs_prop_t prop = zfs_name_to_prop(propname);
186 boolean_t inheritable;
187 uint64_t zapobj;
188
189 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
190 inheritable = (prop == ZPROP_USERPROP || zfs_prop_inheritable(prop));
191 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
192
193 if (zapobj != 0) {
194 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
195 int err;
196
197 ASSERT(ds->ds_is_snapshot);
198
199 /* Check for a local value. */
200 err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
201 if (err != ENOENT) {
202 if (setpoint != NULL && err == 0)
203 dsl_dataset_name(ds, setpoint);
204 return (err);
205 }
206
207 /*
208 * Skip the check for a received value if there is an explicit
209 * inheritance entry.
210 */
211 if (inheritable) {
212 char *inheritstr = kmem_asprintf("%s%s", propname,
213 ZPROP_INHERIT_SUFFIX);
214 err = zap_contains(mos, zapobj, inheritstr);
215 kmem_strfree(inheritstr);
216 if (err != 0 && err != ENOENT)
217 return (err);
218 }
219
220 if (err == ENOENT) {
221 /* Check for a received value. */
222 char *recvdstr = kmem_asprintf("%s%s", propname,
223 ZPROP_RECVD_SUFFIX);
224 err = zap_lookup(mos, zapobj, recvdstr,
225 intsz, numints, buf);
226 kmem_strfree(recvdstr);
227 if (err != ENOENT) {
228 if (setpoint != NULL && err == 0)
229 (void) strlcpy(setpoint,
230 ZPROP_SOURCE_VAL_RECVD,
231 MAXNAMELEN);
232 return (err);
233 }
234 }
235 }
236
237 return (dsl_prop_get_dd(ds->ds_dir, propname,
238 intsz, numints, buf, setpoint, ds->ds_is_snapshot));
239 }
240
241 static dsl_prop_record_t *
dsl_prop_record_find(dsl_dir_t * dd,const char * propname)242 dsl_prop_record_find(dsl_dir_t *dd, const char *propname)
243 {
244 dsl_prop_record_t *pr = NULL;
245
246 ASSERT(MUTEX_HELD(&dd->dd_lock));
247
248 for (pr = list_head(&dd->dd_props);
249 pr != NULL; pr = list_next(&dd->dd_props, pr)) {
250 if (strcmp(pr->pr_propname, propname) == 0)
251 break;
252 }
253
254 return (pr);
255 }
256
257 static dsl_prop_record_t *
dsl_prop_record_create(dsl_dir_t * dd,const char * propname)258 dsl_prop_record_create(dsl_dir_t *dd, const char *propname)
259 {
260 dsl_prop_record_t *pr;
261
262 ASSERT(MUTEX_HELD(&dd->dd_lock));
263
264 pr = kmem_alloc(sizeof (dsl_prop_record_t), KM_SLEEP);
265 pr->pr_propname = spa_strdup(propname);
266 list_create(&pr->pr_cbs, sizeof (dsl_prop_cb_record_t),
267 offsetof(dsl_prop_cb_record_t, cbr_pr_node));
268 list_insert_head(&dd->dd_props, pr);
269
270 return (pr);
271 }
272
273 void
dsl_prop_init(dsl_dir_t * dd)274 dsl_prop_init(dsl_dir_t *dd)
275 {
276 list_create(&dd->dd_props, sizeof (dsl_prop_record_t),
277 offsetof(dsl_prop_record_t, pr_node));
278 }
279
280 void
dsl_prop_fini(dsl_dir_t * dd)281 dsl_prop_fini(dsl_dir_t *dd)
282 {
283 dsl_prop_record_t *pr;
284
285 while ((pr = list_remove_head(&dd->dd_props)) != NULL) {
286 list_destroy(&pr->pr_cbs);
287 spa_strfree((char *)pr->pr_propname);
288 kmem_free(pr, sizeof (dsl_prop_record_t));
289 }
290 list_destroy(&dd->dd_props);
291 }
292
293 /*
294 * Register interest in the named property. We'll call the callback
295 * once to notify it of the current property value, and again each time
296 * the property changes, until this callback is unregistered.
297 *
298 * Return 0 on success, errno if the prop is not an integer value.
299 */
300 int
dsl_prop_register(dsl_dataset_t * ds,const char * propname,dsl_prop_changed_cb_t * callback,void * cbarg)301 dsl_prop_register(dsl_dataset_t *ds, const char *propname,
302 dsl_prop_changed_cb_t *callback, void *cbarg)
303 {
304 dsl_dir_t *dd = ds->ds_dir;
305 uint64_t value;
306 dsl_prop_record_t *pr;
307 dsl_prop_cb_record_t *cbr;
308 int err;
309 dsl_pool_t *dp __maybe_unused = dd->dd_pool;
310
311 ASSERT(dsl_pool_config_held(dp));
312
313 err = dsl_prop_get_int_ds(ds, propname, &value);
314 if (err != 0)
315 return (err);
316
317 cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
318 cbr->cbr_ds = ds;
319 cbr->cbr_func = callback;
320 cbr->cbr_arg = cbarg;
321
322 mutex_enter(&dd->dd_lock);
323 pr = dsl_prop_record_find(dd, propname);
324 if (pr == NULL)
325 pr = dsl_prop_record_create(dd, propname);
326 cbr->cbr_pr = pr;
327 list_insert_head(&pr->pr_cbs, cbr);
328 list_insert_head(&ds->ds_prop_cbs, cbr);
329 mutex_exit(&dd->dd_lock);
330
331 cbr->cbr_func(cbr->cbr_arg, value);
332 return (0);
333 }
334
335 int
dsl_prop_get(const char * dsname,const char * propname,int intsz,int numints,void * buf,char * setpoint)336 dsl_prop_get(const char *dsname, const char *propname,
337 int intsz, int numints, void *buf, char *setpoint)
338 {
339 objset_t *os;
340 int error;
341
342 error = dmu_objset_hold(dsname, FTAG, &os);
343 if (error != 0)
344 return (error);
345
346 error = dsl_prop_get_ds(dmu_objset_ds(os), propname,
347 intsz, numints, buf, setpoint);
348
349 dmu_objset_rele(os, FTAG);
350 return (error);
351 }
352
353 /*
354 * Get the current property value. It may have changed by the time this
355 * function returns, so it is NOT safe to follow up with
356 * dsl_prop_register() and assume that the value has not changed in
357 * between.
358 *
359 * Return 0 on success, ENOENT if ddname is invalid.
360 */
361 int
dsl_prop_get_integer(const char * ddname,const char * propname,uint64_t * valuep,char * setpoint)362 dsl_prop_get_integer(const char *ddname, const char *propname,
363 uint64_t *valuep, char *setpoint)
364 {
365 return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
366 }
367
368 int
dsl_prop_get_int_ds(dsl_dataset_t * ds,const char * propname,uint64_t * valuep)369 dsl_prop_get_int_ds(dsl_dataset_t *ds, const char *propname,
370 uint64_t *valuep)
371 {
372 return (dsl_prop_get_ds(ds, propname, 8, 1, valuep, NULL));
373 }
374
375 /*
376 * Predict the effective value of the given special property if it were set with
377 * the given value and source. This is not a general purpose function. It exists
378 * only to handle the special requirements of the quota and reservation
379 * properties. The fact that these properties are non-inheritable greatly
380 * simplifies the prediction logic.
381 *
382 * Returns 0 on success, a positive error code on failure, or -1 if called with
383 * a property not handled by this function.
384 */
385 int
dsl_prop_predict(dsl_dir_t * dd,const char * propname,zprop_source_t source,uint64_t value,uint64_t * newvalp)386 dsl_prop_predict(dsl_dir_t *dd, const char *propname,
387 zprop_source_t source, uint64_t value, uint64_t *newvalp)
388 {
389 zfs_prop_t prop = zfs_name_to_prop(propname);
390 objset_t *mos;
391 uint64_t zapobj;
392 uint64_t version;
393 char *recvdstr;
394 int err = 0;
395
396 switch (prop) {
397 case ZFS_PROP_QUOTA:
398 case ZFS_PROP_RESERVATION:
399 case ZFS_PROP_REFQUOTA:
400 case ZFS_PROP_REFRESERVATION:
401 break;
402 default:
403 return (-1);
404 }
405
406 mos = dd->dd_pool->dp_meta_objset;
407 zapobj = dsl_dir_phys(dd)->dd_props_zapobj;
408 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
409
410 version = spa_version(dd->dd_pool->dp_spa);
411 if (version < SPA_VERSION_RECVD_PROPS) {
412 if (source & ZPROP_SRC_NONE)
413 source = ZPROP_SRC_NONE;
414 else if (source & ZPROP_SRC_RECEIVED)
415 source = ZPROP_SRC_LOCAL;
416 }
417
418 switch ((int)source) {
419 case ZPROP_SRC_NONE:
420 /* Revert to the received value, if any. */
421 err = zap_lookup(mos, zapobj, recvdstr, 8, 1, newvalp);
422 if (err == ENOENT)
423 *newvalp = 0;
424 break;
425 case ZPROP_SRC_LOCAL:
426 *newvalp = value;
427 break;
428 case ZPROP_SRC_RECEIVED:
429 /*
430 * If there's no local setting, then the new received value will
431 * be the effective value.
432 */
433 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
434 if (err == ENOENT)
435 *newvalp = value;
436 break;
437 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
438 /*
439 * We're clearing the received value, so the local setting (if
440 * it exists) remains the effective value.
441 */
442 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
443 if (err == ENOENT)
444 *newvalp = 0;
445 break;
446 default:
447 panic("unexpected property source: %d", source);
448 }
449
450 kmem_strfree(recvdstr);
451
452 if (err == ENOENT)
453 return (0);
454
455 return (err);
456 }
457
458 /*
459 * Unregister this callback. Return 0 on success, ENOENT if ddname is
460 * invalid, or ENOMSG if no matching callback registered.
461 *
462 * NOTE: This function is no longer used internally but has been preserved
463 * to prevent breaking external consumers (Lustre, etc).
464 */
465 int
dsl_prop_unregister(dsl_dataset_t * ds,const char * propname,dsl_prop_changed_cb_t * callback,void * cbarg)466 dsl_prop_unregister(dsl_dataset_t *ds, const char *propname,
467 dsl_prop_changed_cb_t *callback, void *cbarg)
468 {
469 dsl_dir_t *dd = ds->ds_dir;
470 dsl_prop_cb_record_t *cbr;
471
472 mutex_enter(&dd->dd_lock);
473 for (cbr = list_head(&ds->ds_prop_cbs);
474 cbr; cbr = list_next(&ds->ds_prop_cbs, cbr)) {
475 if (cbr->cbr_ds == ds &&
476 cbr->cbr_func == callback &&
477 cbr->cbr_arg == cbarg &&
478 strcmp(cbr->cbr_pr->pr_propname, propname) == 0)
479 break;
480 }
481
482 if (cbr == NULL) {
483 mutex_exit(&dd->dd_lock);
484 return (SET_ERROR(ENOMSG));
485 }
486
487 list_remove(&ds->ds_prop_cbs, cbr);
488 list_remove(&cbr->cbr_pr->pr_cbs, cbr);
489 mutex_exit(&dd->dd_lock);
490 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
491
492 return (0);
493 }
494
495 /*
496 * Unregister all callbacks that are registered with the
497 * given callback argument.
498 */
499 void
dsl_prop_unregister_all(dsl_dataset_t * ds,void * cbarg)500 dsl_prop_unregister_all(dsl_dataset_t *ds, void *cbarg)
501 {
502 dsl_prop_cb_record_t *cbr, *next_cbr;
503
504 dsl_dir_t *dd = ds->ds_dir;
505
506 mutex_enter(&dd->dd_lock);
507 next_cbr = list_head(&ds->ds_prop_cbs);
508 while (next_cbr != NULL) {
509 cbr = next_cbr;
510 next_cbr = list_next(&ds->ds_prop_cbs, cbr);
511 if (cbr->cbr_arg == cbarg) {
512 list_remove(&ds->ds_prop_cbs, cbr);
513 list_remove(&cbr->cbr_pr->pr_cbs, cbr);
514 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
515 }
516 }
517 mutex_exit(&dd->dd_lock);
518 }
519
520 boolean_t
dsl_prop_hascb(dsl_dataset_t * ds)521 dsl_prop_hascb(dsl_dataset_t *ds)
522 {
523 return (!list_is_empty(&ds->ds_prop_cbs));
524 }
525
526 static int
dsl_prop_notify_all_cb(dsl_pool_t * dp,dsl_dataset_t * ds,void * arg)527 dsl_prop_notify_all_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
528 {
529 (void) arg;
530 dsl_dir_t *dd = ds->ds_dir;
531 dsl_prop_record_t *pr;
532 dsl_prop_cb_record_t *cbr;
533
534 mutex_enter(&dd->dd_lock);
535 for (pr = list_head(&dd->dd_props);
536 pr; pr = list_next(&dd->dd_props, pr)) {
537 for (cbr = list_head(&pr->pr_cbs); cbr;
538 cbr = list_next(&pr->pr_cbs, cbr)) {
539 uint64_t value;
540
541 /*
542 * Callback entries do not have holds on their
543 * datasets so that datasets with registered
544 * callbacks are still eligible for eviction.
545 * Unlike operations to update properties on a
546 * single dataset, we are performing a recursive
547 * descent of related head datasets. The caller
548 * of this function only has a dataset hold on
549 * the passed in head dataset, not the snapshots
550 * associated with this dataset. Without a hold,
551 * the dataset pointer within callback records
552 * for snapshots can be invalidated by eviction
553 * at any time.
554 *
555 * Use dsl_dataset_try_add_ref() to verify
556 * that the dataset for a snapshot has not
557 * begun eviction processing and to prevent
558 * eviction from occurring for the duration of
559 * the callback. If the hold attempt fails,
560 * this object is already being evicted and the
561 * callback can be safely ignored.
562 */
563 if (ds != cbr->cbr_ds &&
564 !dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
565 continue;
566
567 if (dsl_prop_get_ds(cbr->cbr_ds,
568 cbr->cbr_pr->pr_propname, sizeof (value), 1,
569 &value, NULL) == 0)
570 cbr->cbr_func(cbr->cbr_arg, value);
571
572 if (ds != cbr->cbr_ds)
573 dsl_dataset_rele(cbr->cbr_ds, FTAG);
574 }
575 }
576 mutex_exit(&dd->dd_lock);
577
578 return (0);
579 }
580
581 /*
582 * Update all property values for ddobj & its descendants. This is used
583 * when renaming the dir.
584 */
585 void
dsl_prop_notify_all(dsl_dir_t * dd)586 dsl_prop_notify_all(dsl_dir_t *dd)
587 {
588 dsl_pool_t *dp = dd->dd_pool;
589 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
590 (void) dmu_objset_find_dp(dp, dd->dd_object, dsl_prop_notify_all_cb,
591 NULL, DS_FIND_CHILDREN);
592 }
593
594 static void
dsl_prop_changed_notify(dsl_pool_t * dp,uint64_t ddobj,const char * propname,uint64_t value,int first)595 dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
596 const char *propname, uint64_t value, int first)
597 {
598 dsl_dir_t *dd;
599 dsl_prop_record_t *pr;
600 dsl_prop_cb_record_t *cbr;
601 objset_t *mos = dp->dp_meta_objset;
602 zap_cursor_t zc;
603 zap_attribute_t *za;
604 int err;
605
606 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
607 err = dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd);
608 if (err)
609 return;
610
611 if (!first) {
612 /*
613 * If the prop is set here, then this change is not
614 * being inherited here or below; stop the recursion.
615 */
616 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
617 propname);
618 if (err == 0) {
619 dsl_dir_rele(dd, FTAG);
620 return;
621 }
622 ASSERT3U(err, ==, ENOENT);
623 }
624
625 mutex_enter(&dd->dd_lock);
626 pr = dsl_prop_record_find(dd, propname);
627 if (pr != NULL) {
628 for (cbr = list_head(&pr->pr_cbs); cbr;
629 cbr = list_next(&pr->pr_cbs, cbr)) {
630 uint64_t propobj;
631
632 /*
633 * cbr->cbr_ds may be invalidated due to eviction,
634 * requiring the use of dsl_dataset_try_add_ref().
635 * See comment block in dsl_prop_notify_all_cb()
636 * for details.
637 */
638 if (!dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
639 continue;
640
641 propobj = dsl_dataset_phys(cbr->cbr_ds)->ds_props_obj;
642
643 /*
644 * If the property is not set on this ds, then it is
645 * inherited here; call the callback.
646 */
647 if (propobj == 0 ||
648 zap_contains(mos, propobj, propname) != 0)
649 cbr->cbr_func(cbr->cbr_arg, value);
650
651 dsl_dataset_rele(cbr->cbr_ds, FTAG);
652 }
653 }
654 mutex_exit(&dd->dd_lock);
655
656 za = zap_attribute_alloc();
657 for (zap_cursor_init(&zc, mos,
658 dsl_dir_phys(dd)->dd_child_dir_zapobj);
659 zap_cursor_retrieve(&zc, za) == 0;
660 zap_cursor_advance(&zc)) {
661 dsl_prop_changed_notify(dp, za->za_first_integer,
662 propname, value, FALSE);
663 }
664 zap_attribute_free(za);
665 zap_cursor_fini(&zc);
666 dsl_dir_rele(dd, FTAG);
667 }
668
669
670 /*
671 * For newer values in zfs index type properties, we add a new key
672 * propname$iuv (iuv = Ignore Unknown Values) to the properties zap object
673 * to store the new property value and store the default value in the
674 * existing prop key. So that the propname$iuv key is ignored by the older zfs
675 * versions and the default property value from the existing prop key is
676 * used.
677 */
678 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)679 dsl_prop_set_iuv(objset_t *mos, uint64_t zapobj, const char *propname,
680 int intsz, int numints, const void *value, dmu_tx_t *tx)
681 {
682 char *iuvstr = kmem_asprintf("%s%s", propname, ZPROP_IUV_SUFFIX);
683 boolean_t iuv = B_FALSE;
684 zfs_prop_t prop = zfs_name_to_prop(propname);
685
686 switch (prop) {
687 case ZFS_PROP_REDUNDANT_METADATA:
688 if (*(uint64_t *)value == ZFS_REDUNDANT_METADATA_SOME ||
689 *(uint64_t *)value == ZFS_REDUNDANT_METADATA_NONE)
690 iuv = B_TRUE;
691 break;
692 case ZFS_PROP_SNAPDIR:
693 if (*(uint64_t *)value == ZFS_SNAPDIR_DISABLED)
694 iuv = B_TRUE;
695 break;
696 default:
697 break;
698 }
699
700 if (iuv) {
701 VERIFY0(zap_update(mos, zapobj, iuvstr, intsz, numints,
702 value, tx));
703 uint64_t val = zfs_prop_default_numeric(prop);
704 VERIFY0(zap_update(mos, zapobj, propname, intsz, numints,
705 &val, tx));
706 } else {
707 zap_remove(mos, zapobj, iuvstr, tx);
708 }
709 kmem_strfree(iuvstr);
710 }
711
712 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)713 dsl_prop_set_sync_impl(dsl_dataset_t *ds, const char *propname,
714 zprop_source_t source, int intsz, int numints, const void *value,
715 dmu_tx_t *tx)
716 {
717 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
718 uint64_t zapobj, intval, dummy, count;
719 int isint;
720 char valbuf[32];
721 const char *valstr = NULL;
722 char *inheritstr;
723 char *recvdstr;
724 char *iuvstr;
725 char *tbuf = NULL;
726 int err;
727 uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
728
729 isint = (dodefault(zfs_name_to_prop(propname), 8, 1, &intval) == 0);
730
731 if (ds->ds_is_snapshot) {
732 ASSERT(version >= SPA_VERSION_SNAP_PROPS);
733 if (dsl_dataset_phys(ds)->ds_props_obj == 0 &&
734 (source & ZPROP_SRC_NONE) == 0) {
735 dmu_buf_will_dirty(ds->ds_dbuf, tx);
736 dsl_dataset_phys(ds)->ds_props_obj =
737 zap_create(mos,
738 DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
739 }
740 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
741 } else {
742 zapobj = dsl_dir_phys(ds->ds_dir)->dd_props_zapobj;
743 }
744
745 /* If we are removing objects from a non-existent ZAP just return */
746 if (zapobj == 0)
747 return;
748
749 if (version < SPA_VERSION_RECVD_PROPS) {
750 if (source & ZPROP_SRC_NONE)
751 source = ZPROP_SRC_NONE;
752 else if (source & ZPROP_SRC_RECEIVED)
753 source = ZPROP_SRC_LOCAL;
754 }
755
756 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
757 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
758 iuvstr = kmem_asprintf("%s%s", propname, ZPROP_IUV_SUFFIX);
759
760 switch ((int)source) {
761 case ZPROP_SRC_NONE:
762 /*
763 * revert to received value, if any (inherit -S)
764 * - remove propname
765 * - remove propname$inherit
766 */
767 err = zap_remove(mos, zapobj, propname, tx);
768 ASSERT(err == 0 || err == ENOENT);
769 err = zap_remove(mos, zapobj, inheritstr, tx);
770 ASSERT(err == 0 || err == ENOENT);
771 break;
772 case ZPROP_SRC_LOCAL:
773 /*
774 * remove propname$inherit
775 * set propname -> value
776 * set propname$iuv -> new property value
777 */
778 err = zap_remove(mos, zapobj, inheritstr, tx);
779 ASSERT(err == 0 || err == ENOENT);
780 VERIFY0(zap_update(mos, zapobj, propname,
781 intsz, numints, value, tx));
782 (void) dsl_prop_set_iuv(mos, zapobj, propname, intsz,
783 numints, value, tx);
784 break;
785 case ZPROP_SRC_INHERITED:
786 /*
787 * explicitly inherit
788 * - remove propname
789 * - set propname$inherit
790 */
791 err = zap_remove(mos, zapobj, propname, tx);
792 ASSERT(err == 0 || err == ENOENT);
793 err = zap_remove(mos, zapobj, iuvstr, tx);
794 ASSERT(err == 0 || err == ENOENT);
795 if (version >= SPA_VERSION_RECVD_PROPS &&
796 dsl_prop_get_int_ds(ds, ZPROP_HAS_RECVD, &dummy) == 0) {
797 dummy = 0;
798 VERIFY0(zap_update(mos, zapobj, inheritstr,
799 8, 1, &dummy, tx));
800 }
801 break;
802 case ZPROP_SRC_RECEIVED:
803 /*
804 * set propname$recvd -> value
805 */
806 err = zap_update(mos, zapobj, recvdstr,
807 intsz, numints, value, tx);
808 ASSERT0(err);
809 break;
810 case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
811 /*
812 * clear local and received settings
813 * - remove propname
814 * - remove propname$inherit
815 * - remove propname$recvd
816 */
817 err = zap_remove(mos, zapobj, propname, tx);
818 ASSERT(err == 0 || err == ENOENT);
819 err = zap_remove(mos, zapobj, inheritstr, tx);
820 ASSERT(err == 0 || err == ENOENT);
821 zfs_fallthrough;
822 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
823 /*
824 * remove propname$recvd
825 */
826 err = zap_remove(mos, zapobj, recvdstr, tx);
827 ASSERT(err == 0 || err == ENOENT);
828 break;
829 default:
830 cmn_err(CE_PANIC, "unexpected property source: %d", source);
831 }
832
833 kmem_strfree(inheritstr);
834 kmem_strfree(recvdstr);
835 kmem_strfree(iuvstr);
836
837 /*
838 * If we are left with an empty snap zap we can destroy it.
839 * This will prevent unnecessary calls to zap_lookup() in
840 * the "zfs list" and "zfs get" code paths.
841 */
842 if (ds->ds_is_snapshot &&
843 zap_count(mos, zapobj, &count) == 0 && count == 0) {
844 dmu_buf_will_dirty(ds->ds_dbuf, tx);
845 dsl_dataset_phys(ds)->ds_props_obj = 0;
846 zap_destroy(mos, zapobj, tx);
847 }
848
849 if (isint) {
850 VERIFY0(dsl_prop_get_int_ds(ds, propname, &intval));
851
852 if (ds->ds_is_snapshot) {
853 dsl_prop_cb_record_t *cbr;
854 /*
855 * It's a snapshot; nothing can inherit this
856 * property, so just look for callbacks on this
857 * ds here.
858 */
859 mutex_enter(&ds->ds_dir->dd_lock);
860 for (cbr = list_head(&ds->ds_prop_cbs); cbr;
861 cbr = list_next(&ds->ds_prop_cbs, cbr)) {
862 if (strcmp(cbr->cbr_pr->pr_propname,
863 propname) == 0)
864 cbr->cbr_func(cbr->cbr_arg, intval);
865 }
866 mutex_exit(&ds->ds_dir->dd_lock);
867 } else {
868 dsl_prop_changed_notify(ds->ds_dir->dd_pool,
869 ds->ds_dir->dd_object, propname, intval, TRUE);
870 }
871
872 (void) snprintf(valbuf, sizeof (valbuf),
873 "%lld", (longlong_t)intval);
874 valstr = valbuf;
875 } else {
876 if (source == ZPROP_SRC_LOCAL) {
877 valstr = value;
878 } else {
879 tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
880 if (dsl_prop_get_ds(ds, propname, 1,
881 ZAP_MAXVALUELEN, tbuf, NULL) == 0)
882 valstr = tbuf;
883 }
884 }
885
886 spa_history_log_internal_ds(ds, (source == ZPROP_SRC_NONE ||
887 source == ZPROP_SRC_INHERITED) ? "inherit" : "set", tx,
888 "%s=%s", propname, (valstr == NULL ? "" : valstr));
889
890 if (tbuf != NULL)
891 kmem_free(tbuf, ZAP_MAXVALUELEN);
892 }
893
894 int
dsl_prop_set_int(const char * dsname,const char * propname,zprop_source_t source,uint64_t value)895 dsl_prop_set_int(const char *dsname, const char *propname,
896 zprop_source_t source, uint64_t value)
897 {
898 nvlist_t *nvl = fnvlist_alloc();
899 int error;
900
901 fnvlist_add_uint64(nvl, propname, value);
902 error = dsl_props_set(dsname, source, nvl);
903 fnvlist_free(nvl);
904 return (error);
905 }
906
907 int
dsl_prop_set_string(const char * dsname,const char * propname,zprop_source_t source,const char * value)908 dsl_prop_set_string(const char *dsname, const char *propname,
909 zprop_source_t source, const char *value)
910 {
911 nvlist_t *nvl = fnvlist_alloc();
912 int error;
913
914 fnvlist_add_string(nvl, propname, value);
915 error = dsl_props_set(dsname, source, nvl);
916 fnvlist_free(nvl);
917 return (error);
918 }
919
920 int
dsl_prop_inherit(const char * dsname,const char * propname,zprop_source_t source)921 dsl_prop_inherit(const char *dsname, const char *propname,
922 zprop_source_t source)
923 {
924 nvlist_t *nvl = fnvlist_alloc();
925 int error;
926
927 fnvlist_add_boolean(nvl, propname);
928 error = dsl_props_set(dsname, source, nvl);
929 fnvlist_free(nvl);
930 return (error);
931 }
932
933 int
dsl_props_set_check(void * arg,dmu_tx_t * tx)934 dsl_props_set_check(void *arg, dmu_tx_t *tx)
935 {
936 dsl_props_set_arg_t *dpsa = arg;
937 dsl_pool_t *dp = dmu_tx_pool(tx);
938 dsl_dataset_t *ds;
939 uint64_t version;
940 nvpair_t *elem = NULL;
941 int err;
942
943 err = dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds);
944 if (err != 0)
945 return (err);
946
947 version = spa_version(ds->ds_dir->dd_pool->dp_spa);
948 while ((elem = nvlist_next_nvpair(dpsa->dpsa_props, elem)) != NULL) {
949 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
950 dsl_dataset_rele(ds, FTAG);
951 return (SET_ERROR(ENAMETOOLONG));
952 }
953 if (nvpair_type(elem) == DATA_TYPE_STRING) {
954 const char *valstr = fnvpair_value_string(elem);
955 if (strlen(valstr) >= (version <
956 SPA_VERSION_STMF_PROP ?
957 ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
958 dsl_dataset_rele(ds, FTAG);
959 return (SET_ERROR(E2BIG));
960 }
961 }
962 }
963
964 if (ds->ds_is_snapshot && version < SPA_VERSION_SNAP_PROPS) {
965 dsl_dataset_rele(ds, FTAG);
966 return (SET_ERROR(ENOTSUP));
967 }
968 dsl_dataset_rele(ds, FTAG);
969 return (0);
970 }
971
972 void
dsl_props_set_sync_impl(dsl_dataset_t * ds,zprop_source_t source,nvlist_t * props,dmu_tx_t * tx)973 dsl_props_set_sync_impl(dsl_dataset_t *ds, zprop_source_t source,
974 nvlist_t *props, dmu_tx_t *tx)
975 {
976 nvpair_t *elem = NULL;
977
978 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
979 nvpair_t *pair = elem;
980 const char *name = nvpair_name(pair);
981
982 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
983 /*
984 * This usually happens when we reuse the nvlist_t data
985 * returned by the counterpart dsl_prop_get_all_impl().
986 * For instance we do this to restore the original
987 * received properties when an error occurs in the
988 * zfs_ioc_recv() codepath.
989 */
990 nvlist_t *attrs = fnvpair_value_nvlist(pair);
991 pair = fnvlist_lookup_nvpair(attrs, ZPROP_VALUE);
992 }
993
994 if (nvpair_type(pair) == DATA_TYPE_STRING) {
995 const char *value = fnvpair_value_string(pair);
996 dsl_prop_set_sync_impl(ds, name,
997 source, 1, strlen(value) + 1, value, tx);
998 } else if (nvpair_type(pair) == DATA_TYPE_UINT64) {
999 uint64_t intval = fnvpair_value_uint64(pair);
1000 dsl_prop_set_sync_impl(ds, name,
1001 source, sizeof (intval), 1, &intval, tx);
1002 } else if (nvpair_type(pair) == DATA_TYPE_BOOLEAN) {
1003 dsl_prop_set_sync_impl(ds, name,
1004 source, 0, 0, NULL, tx);
1005 } else {
1006 panic("invalid nvpair type");
1007 }
1008 }
1009 }
1010
1011 void
dsl_props_set_sync(void * arg,dmu_tx_t * tx)1012 dsl_props_set_sync(void *arg, dmu_tx_t *tx)
1013 {
1014 dsl_props_set_arg_t *dpsa = arg;
1015 dsl_pool_t *dp = dmu_tx_pool(tx);
1016 dsl_dataset_t *ds;
1017
1018 VERIFY0(dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds));
1019 dsl_props_set_sync_impl(ds, dpsa->dpsa_source, dpsa->dpsa_props, tx);
1020 dsl_dataset_rele(ds, FTAG);
1021 }
1022
1023 /*
1024 * All-or-nothing; if any prop can't be set, nothing will be modified.
1025 */
1026 int
dsl_props_set(const char * dsname,zprop_source_t source,nvlist_t * props)1027 dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
1028 {
1029 dsl_props_set_arg_t dpsa;
1030 int nblks = 0;
1031
1032 dpsa.dpsa_dsname = dsname;
1033 dpsa.dpsa_source = source;
1034 dpsa.dpsa_props = props;
1035
1036 /*
1037 * If the source includes NONE, then we will only be removing entries
1038 * from the ZAP object. In that case don't check for ENOSPC.
1039 */
1040 if ((source & ZPROP_SRC_NONE) == 0)
1041 nblks = 2 * fnvlist_num_pairs(props);
1042
1043 return (dsl_sync_task(dsname, dsl_props_set_check, dsl_props_set_sync,
1044 &dpsa, nblks, ZFS_SPACE_CHECK_RESERVED));
1045 }
1046
1047 typedef enum dsl_prop_getflags {
1048 DSL_PROP_GET_INHERITING = 0x1, /* searching parent of target ds */
1049 DSL_PROP_GET_SNAPSHOT = 0x2, /* snapshot dataset */
1050 DSL_PROP_GET_LOCAL = 0x4, /* local properties */
1051 DSL_PROP_GET_RECEIVED = 0x8, /* received properties */
1052 } dsl_prop_getflags_t;
1053
1054 static int
dsl_prop_get_all_impl(objset_t * mos,uint64_t propobj,const char * setpoint,dsl_prop_getflags_t flags,nvlist_t * nv)1055 dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
1056 const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
1057 {
1058 zap_cursor_t zc;
1059 zap_attribute_t *za = zap_attribute_alloc();
1060 int err = 0;
1061
1062 for (zap_cursor_init(&zc, mos, propobj);
1063 (err = zap_cursor_retrieve(&zc, za)) == 0;
1064 zap_cursor_advance(&zc)) {
1065 nvlist_t *propval;
1066 zfs_prop_t prop;
1067 char buf[ZAP_MAXNAMELEN];
1068 char *valstr;
1069 const char *suffix;
1070 const char *propname;
1071 const char *source;
1072
1073 suffix = strchr(za->za_name, '$');
1074
1075 if (suffix == NULL) {
1076 /*
1077 * Skip local properties if we only want received
1078 * properties.
1079 */
1080 if (flags & DSL_PROP_GET_RECEIVED)
1081 continue;
1082
1083 propname = za->za_name;
1084 source = setpoint;
1085
1086 /* Skip if iuv entries are preset. */
1087 valstr = kmem_asprintf("%s%s", propname,
1088 ZPROP_IUV_SUFFIX);
1089 err = zap_contains(mos, propobj, valstr);
1090 kmem_strfree(valstr);
1091 if (err == 0)
1092 continue;
1093 } else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
1094 /* Skip explicitly inherited entries. */
1095 continue;
1096 } else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
1097 if (flags & DSL_PROP_GET_LOCAL)
1098 continue;
1099
1100 (void) strlcpy(buf, za->za_name,
1101 MIN(sizeof (buf), suffix - za->za_name + 1));
1102 propname = buf;
1103
1104 if (!(flags & DSL_PROP_GET_RECEIVED)) {
1105 /* Skip if locally overridden. */
1106 err = zap_contains(mos, propobj, propname);
1107 if (err == 0)
1108 continue;
1109 if (err != ENOENT)
1110 break;
1111
1112 /* Skip if explicitly inherited. */
1113 valstr = kmem_asprintf("%s%s", propname,
1114 ZPROP_INHERIT_SUFFIX);
1115 err = zap_contains(mos, propobj, valstr);
1116 kmem_strfree(valstr);
1117 if (err == 0)
1118 continue;
1119 if (err != ENOENT)
1120 break;
1121 }
1122
1123 source = ((flags & DSL_PROP_GET_INHERITING) ?
1124 setpoint : ZPROP_SOURCE_VAL_RECVD);
1125 } else if (strcmp(suffix, ZPROP_IUV_SUFFIX) == 0) {
1126 (void) strlcpy(buf, za->za_name,
1127 MIN(sizeof (buf), suffix - za->za_name + 1));
1128 propname = buf;
1129 source = setpoint;
1130 prop = zfs_name_to_prop(propname);
1131
1132 if (dsl_prop_known_index(prop,
1133 za->za_first_integer) != 1)
1134 continue;
1135 } else {
1136 /*
1137 * For backward compatibility, skip suffixes we don't
1138 * recognize.
1139 */
1140 continue;
1141 }
1142
1143 prop = zfs_name_to_prop(propname);
1144
1145 /* Skip non-inheritable properties. */
1146 if ((flags & DSL_PROP_GET_INHERITING) &&
1147 prop != ZPROP_USERPROP && !zfs_prop_inheritable(prop))
1148 continue;
1149
1150 /* Skip properties not valid for this type. */
1151 if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_USERPROP &&
1152 !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT, B_FALSE))
1153 continue;
1154
1155 /* Skip properties already defined. */
1156 if (nvlist_exists(nv, propname))
1157 continue;
1158
1159 VERIFY0(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP));
1160 if (za->za_integer_length == 1) {
1161 /*
1162 * String property
1163 */
1164 char *tmp = kmem_alloc(za->za_num_integers,
1165 KM_SLEEP);
1166 err = zap_lookup(mos, propobj,
1167 za->za_name, 1, za->za_num_integers, tmp);
1168 if (err != 0) {
1169 kmem_free(tmp, za->za_num_integers);
1170 break;
1171 }
1172 VERIFY0(nvlist_add_string(propval, ZPROP_VALUE, tmp));
1173 kmem_free(tmp, za->za_num_integers);
1174 } else {
1175 /*
1176 * Integer property
1177 */
1178 ASSERT(za->za_integer_length == 8);
1179 (void) nvlist_add_uint64(propval, ZPROP_VALUE,
1180 za->za_first_integer);
1181 }
1182
1183 VERIFY0(nvlist_add_string(propval, ZPROP_SOURCE, source));
1184 VERIFY0(nvlist_add_nvlist(nv, propname, propval));
1185 nvlist_free(propval);
1186 }
1187 zap_cursor_fini(&zc);
1188 zap_attribute_free(za);
1189 if (err == ENOENT)
1190 err = 0;
1191 return (err);
1192 }
1193
1194 /*
1195 * Iterate over all properties for this dataset and return them in an nvlist.
1196 */
1197 static int
dsl_prop_get_all_ds(dsl_dataset_t * ds,nvlist_t ** nvp,dsl_prop_getflags_t flags)1198 dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
1199 dsl_prop_getflags_t flags)
1200 {
1201 dsl_dir_t *dd = ds->ds_dir;
1202 dsl_pool_t *dp = dd->dd_pool;
1203 objset_t *mos = dp->dp_meta_objset;
1204 int err = 0;
1205 char setpoint[ZFS_MAX_DATASET_NAME_LEN];
1206
1207 VERIFY0(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP));
1208
1209 if (ds->ds_is_snapshot)
1210 flags |= DSL_PROP_GET_SNAPSHOT;
1211
1212 ASSERT(dsl_pool_config_held(dp));
1213
1214 if (dsl_dataset_phys(ds)->ds_props_obj != 0) {
1215 ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
1216 dsl_dataset_name(ds, setpoint);
1217 err = dsl_prop_get_all_impl(mos,
1218 dsl_dataset_phys(ds)->ds_props_obj, setpoint, flags, *nvp);
1219 if (err)
1220 goto out;
1221 }
1222
1223 for (; dd != NULL; dd = dd->dd_parent) {
1224 if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
1225 if (flags & (DSL_PROP_GET_LOCAL |
1226 DSL_PROP_GET_RECEIVED))
1227 break;
1228 flags |= DSL_PROP_GET_INHERITING;
1229 }
1230 dsl_dir_name(dd, setpoint);
1231 err = dsl_prop_get_all_impl(mos,
1232 dsl_dir_phys(dd)->dd_props_zapobj, setpoint, flags, *nvp);
1233 if (err)
1234 break;
1235 }
1236
1237 out:
1238 if (err) {
1239 nvlist_free(*nvp);
1240 *nvp = NULL;
1241 }
1242 return (err);
1243 }
1244
1245 boolean_t
dsl_prop_get_hasrecvd(const char * dsname)1246 dsl_prop_get_hasrecvd(const char *dsname)
1247 {
1248 uint64_t dummy;
1249
1250 return (0 ==
1251 dsl_prop_get_integer(dsname, ZPROP_HAS_RECVD, &dummy, NULL));
1252 }
1253
1254 static int
dsl_prop_set_hasrecvd_impl(const char * dsname,zprop_source_t source)1255 dsl_prop_set_hasrecvd_impl(const char *dsname, zprop_source_t source)
1256 {
1257 uint64_t version;
1258 spa_t *spa;
1259 int error = 0;
1260
1261 VERIFY0(spa_open(dsname, &spa, FTAG));
1262 version = spa_version(spa);
1263 spa_close(spa, FTAG);
1264
1265 if (version >= SPA_VERSION_RECVD_PROPS)
1266 error = dsl_prop_set_int(dsname, ZPROP_HAS_RECVD, source, 0);
1267 return (error);
1268 }
1269
1270 /*
1271 * Call after successfully receiving properties to ensure that only the first
1272 * receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
1273 */
1274 int
dsl_prop_set_hasrecvd(const char * dsname)1275 dsl_prop_set_hasrecvd(const char *dsname)
1276 {
1277 int error = 0;
1278 if (!dsl_prop_get_hasrecvd(dsname))
1279 error = dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_LOCAL);
1280 return (error);
1281 }
1282
1283 void
dsl_prop_unset_hasrecvd(const char * dsname)1284 dsl_prop_unset_hasrecvd(const char *dsname)
1285 {
1286 VERIFY0(dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_NONE));
1287 }
1288
1289 int
dsl_prop_get_all(objset_t * os,nvlist_t ** nvp)1290 dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
1291 {
1292 return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
1293 }
1294
1295 int
dsl_prop_get_received(const char * dsname,nvlist_t ** nvp)1296 dsl_prop_get_received(const char *dsname, nvlist_t **nvp)
1297 {
1298 objset_t *os;
1299 int error;
1300
1301 /*
1302 * Received properties are not distinguishable from local properties
1303 * until the dataset has received properties on or after
1304 * SPA_VERSION_RECVD_PROPS.
1305 */
1306 dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(dsname) ?
1307 DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
1308
1309 error = dmu_objset_hold(dsname, FTAG, &os);
1310 if (error != 0)
1311 return (error);
1312 error = dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags);
1313 dmu_objset_rele(os, FTAG);
1314 return (error);
1315 }
1316
1317 void
dsl_prop_nvlist_add_uint64(nvlist_t * nv,zfs_prop_t prop,uint64_t value)1318 dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
1319 {
1320 nvlist_t *propval;
1321 const char *propname = zfs_prop_to_name(prop);
1322 uint64_t default_value;
1323
1324 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1325 VERIFY0(nvlist_add_uint64(propval, ZPROP_VALUE, value));
1326 return;
1327 }
1328
1329 VERIFY0(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP));
1330 VERIFY0(nvlist_add_uint64(propval, ZPROP_VALUE, value));
1331 /* Indicate the default source if we can. */
1332 if (dodefault(prop, 8, 1, &default_value) == 0 &&
1333 value == default_value) {
1334 VERIFY0(nvlist_add_string(propval, ZPROP_SOURCE, ""));
1335 }
1336 VERIFY0(nvlist_add_nvlist(nv, propname, propval));
1337 nvlist_free(propval);
1338 }
1339
1340 void
dsl_prop_nvlist_add_string(nvlist_t * nv,zfs_prop_t prop,const char * value)1341 dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
1342 {
1343 nvlist_t *propval;
1344 const char *propname = zfs_prop_to_name(prop);
1345
1346 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1347 VERIFY0(nvlist_add_string(propval, ZPROP_VALUE, value));
1348 return;
1349 }
1350
1351 VERIFY0(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP));
1352 VERIFY0(nvlist_add_string(propval, ZPROP_VALUE, value));
1353 VERIFY0(nvlist_add_nvlist(nv, propname, propval));
1354 nvlist_free(propval);
1355 }
1356
1357 #if defined(_KERNEL)
1358 EXPORT_SYMBOL(dsl_prop_register);
1359 EXPORT_SYMBOL(dsl_prop_unregister);
1360 EXPORT_SYMBOL(dsl_prop_unregister_all);
1361 EXPORT_SYMBOL(dsl_prop_get);
1362 EXPORT_SYMBOL(dsl_prop_get_integer);
1363 EXPORT_SYMBOL(dsl_prop_get_all);
1364 EXPORT_SYMBOL(dsl_prop_get_received);
1365 EXPORT_SYMBOL(dsl_prop_get_ds);
1366 EXPORT_SYMBOL(dsl_prop_get_int_ds);
1367 EXPORT_SYMBOL(dsl_prop_get_dd);
1368 EXPORT_SYMBOL(dsl_props_set);
1369 EXPORT_SYMBOL(dsl_prop_set_int);
1370 EXPORT_SYMBOL(dsl_prop_set_string);
1371 EXPORT_SYMBOL(dsl_prop_inherit);
1372 EXPORT_SYMBOL(dsl_prop_predict);
1373 EXPORT_SYMBOL(dsl_prop_nvlist_add_uint64);
1374 EXPORT_SYMBOL(dsl_prop_nvlist_add_string);
1375 #endif
1376