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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 #include <sys/zfs_context.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>
35 #include <sys/fs/zfs.h>
39 #define ZPROP_INHERIT_SUFFIX "$inherit"
40 #define ZPROP_RECVD_SUFFIX "$recvd"
43 dodefault(const char *propname, int intsz, int numints, void *buf)
48 * The setonce properties are read-only, BUT they still
49 * have a default value that can be used as the initial
52 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL ||
53 (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
56 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
59 (void) strncpy(buf, zfs_prop_default_string(prop),
62 if (intsz != 8 || numints < 1)
65 *(uint64_t *)buf = zfs_prop_default_numeric(prop);
72 dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
73 int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
76 dsl_dir_t *target = dd;
77 objset_t *mos = dd->dd_pool->dp_meta_objset;
79 boolean_t inheritable;
80 boolean_t inheriting = B_FALSE;
84 ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock));
89 prop = zfs_name_to_prop(propname);
90 inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
91 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
92 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
95 * Note: dd may become NULL, therefore we shouldn't dereference it
98 for (; dd != NULL; dd = dd->dd_parent) {
99 ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock));
101 if (dd != target || snapshot) {
107 /* Check for a local value. */
108 err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj, propname,
109 intsz, numints, buf);
111 if (setpoint != NULL && err == 0)
112 dsl_dir_name(dd, setpoint);
117 * Skip the check for a received value if there is an explicit
120 err = zap_contains(mos, dd->dd_phys->dd_props_zapobj,
122 if (err != 0 && err != ENOENT)
126 /* Check for a received value. */
127 err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj,
128 recvdstr, intsz, numints, buf);
130 if (setpoint != NULL && err == 0) {
132 dsl_dir_name(dd, setpoint);
134 (void) strcpy(setpoint,
135 ZPROP_SOURCE_VAL_RECVD);
143 * If we found an explicit inheritance entry, err is zero even
144 * though we haven't yet found the value, so reinitializing err
145 * at the end of the loop (instead of at the beginning) ensures
146 * that err has a valid post-loop value.
152 err = dodefault(propname, intsz, numints, buf);
161 dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
162 int intsz, int numints, void *buf, char *setpoint)
164 zfs_prop_t prop = zfs_name_to_prop(propname);
165 boolean_t inheritable;
169 ASSERT(RW_LOCK_HELD(&ds->ds_dir->dd_pool->dp_config_rwlock));
170 inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
171 snapshot = (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds));
172 zapobj = (ds->ds_phys == NULL ? 0 : ds->ds_phys->ds_props_obj);
175 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
180 /* Check for a local value. */
181 err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
183 if (setpoint != NULL && err == 0)
184 dsl_dataset_name(ds, setpoint);
189 * Skip the check for a received value if there is an explicit
193 char *inheritstr = kmem_asprintf("%s%s", propname,
194 ZPROP_INHERIT_SUFFIX);
195 err = zap_contains(mos, zapobj, inheritstr);
197 if (err != 0 && err != ENOENT)
202 /* Check for a received value. */
203 char *recvdstr = kmem_asprintf("%s%s", propname,
205 err = zap_lookup(mos, zapobj, recvdstr,
206 intsz, numints, buf);
209 if (setpoint != NULL && err == 0)
210 (void) strcpy(setpoint,
211 ZPROP_SOURCE_VAL_RECVD);
217 return (dsl_prop_get_dd(ds->ds_dir, propname,
218 intsz, numints, buf, setpoint, snapshot));
222 * Register interest in the named property. We'll call the callback
223 * once to notify it of the current property value, and again each time
224 * the property changes, until this callback is unregistered.
226 * Return 0 on success, errno if the prop is not an integer value.
229 dsl_prop_register(dsl_dataset_t *ds, const char *propname,
230 dsl_prop_changed_cb_t *callback, void *cbarg)
232 dsl_dir_t *dd = ds->ds_dir;
233 dsl_pool_t *dp = dd->dd_pool;
235 dsl_prop_cb_record_t *cbr;
239 need_rwlock = !RW_WRITE_HELD(&dp->dp_config_rwlock);
241 rw_enter(&dp->dp_config_rwlock, RW_READER);
243 err = dsl_prop_get_ds(ds, propname, 8, 1, &value, NULL);
246 rw_exit(&dp->dp_config_rwlock);
250 cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
252 cbr->cbr_propname = kmem_alloc(strlen(propname)+1, KM_SLEEP);
253 (void) strcpy((char *)cbr->cbr_propname, propname);
254 cbr->cbr_func = callback;
255 cbr->cbr_arg = cbarg;
256 mutex_enter(&dd->dd_lock);
257 list_insert_head(&dd->dd_prop_cbs, cbr);
258 mutex_exit(&dd->dd_lock);
260 cbr->cbr_func(cbr->cbr_arg, value);
263 rw_exit(&dp->dp_config_rwlock);
268 dsl_prop_get(const char *dsname, const char *propname,
269 int intsz, int numints, void *buf, char *setpoint)
274 err = dsl_dataset_hold(dsname, FTAG, &ds);
278 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
279 err = dsl_prop_get_ds(ds, propname, intsz, numints, buf, setpoint);
280 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
282 dsl_dataset_rele(ds, FTAG);
287 * Get the current property value. It may have changed by the time this
288 * function returns, so it is NOT safe to follow up with
289 * dsl_prop_register() and assume that the value has not changed in
292 * Return 0 on success, ENOENT if ddname is invalid.
295 dsl_prop_get_integer(const char *ddname, const char *propname,
296 uint64_t *valuep, char *setpoint)
298 return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
302 dsl_prop_setarg_init_uint64(dsl_prop_setarg_t *psa, const char *propname,
303 zprop_source_t source, uint64_t *value)
305 psa->psa_name = propname;
306 psa->psa_source = source;
308 psa->psa_numints = 1;
309 psa->psa_value = value;
311 psa->psa_effective_value = -1ULL;
315 * Predict the effective value of the given special property if it were set with
316 * the given value and source. This is not a general purpose function. It exists
317 * only to handle the special requirements of the quota and reservation
318 * properties. The fact that these properties are non-inheritable greatly
319 * simplifies the prediction logic.
321 * Returns 0 on success, a positive error code on failure, or -1 if called with
322 * a property not handled by this function.
325 dsl_prop_predict_sync(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
327 const char *propname = psa->psa_name;
328 zfs_prop_t prop = zfs_name_to_prop(propname);
329 zprop_source_t source = psa->psa_source;
338 case ZFS_PROP_RESERVATION:
339 case ZFS_PROP_REFQUOTA:
340 case ZFS_PROP_REFRESERVATION:
346 mos = dd->dd_pool->dp_meta_objset;
347 zapobj = dd->dd_phys->dd_props_zapobj;
348 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
350 version = spa_version(dd->dd_pool->dp_spa);
351 if (version < SPA_VERSION_RECVD_PROPS) {
352 if (source & ZPROP_SRC_NONE)
353 source = ZPROP_SRC_NONE;
354 else if (source & ZPROP_SRC_RECEIVED)
355 source = ZPROP_SRC_LOCAL;
360 /* Revert to the received value, if any. */
361 err = zap_lookup(mos, zapobj, recvdstr, 8, 1,
362 &psa->psa_effective_value);
364 psa->psa_effective_value = 0;
366 case ZPROP_SRC_LOCAL:
367 psa->psa_effective_value = *(uint64_t *)psa->psa_value;
369 case ZPROP_SRC_RECEIVED:
371 * If there's no local setting, then the new received value will
372 * be the effective value.
374 err = zap_lookup(mos, zapobj, propname, 8, 1,
375 &psa->psa_effective_value);
377 psa->psa_effective_value = *(uint64_t *)psa->psa_value;
379 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
381 * We're clearing the received value, so the local setting (if
382 * it exists) remains the effective value.
384 err = zap_lookup(mos, zapobj, propname, 8, 1,
385 &psa->psa_effective_value);
387 psa->psa_effective_value = 0;
390 cmn_err(CE_PANIC, "unexpected property source: %d", source);
403 dsl_prop_check_prediction(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
405 zfs_prop_t prop = zfs_name_to_prop(psa->psa_name);
407 char setpoint[MAXNAMELEN];
408 uint64_t version = spa_version(dd->dd_pool->dp_spa);
411 if (version < SPA_VERSION_RECVD_PROPS) {
414 case ZFS_PROP_RESERVATION:
421 err = dsl_prop_get_dd(dd, psa->psa_name, 8, 1, &intval,
423 if (err == 0 && intval != psa->psa_effective_value) {
424 cmn_err(CE_PANIC, "%s property, source: %x, "
425 "predicted effective value: %llu, "
426 "actual effective value: %llu (setpoint: %s)",
427 psa->psa_name, psa->psa_source,
428 (unsigned long long)psa->psa_effective_value,
429 (unsigned long long)intval, setpoint);
435 * Unregister this callback. Return 0 on success, ENOENT if ddname is
436 * invalid, ENOMSG if no matching callback registered.
439 dsl_prop_unregister(dsl_dataset_t *ds, const char *propname,
440 dsl_prop_changed_cb_t *callback, void *cbarg)
442 dsl_dir_t *dd = ds->ds_dir;
443 dsl_prop_cb_record_t *cbr;
445 mutex_enter(&dd->dd_lock);
446 for (cbr = list_head(&dd->dd_prop_cbs);
447 cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
448 if (cbr->cbr_ds == ds &&
449 cbr->cbr_func == callback &&
450 cbr->cbr_arg == cbarg &&
451 strcmp(cbr->cbr_propname, propname) == 0)
456 mutex_exit(&dd->dd_lock);
460 list_remove(&dd->dd_prop_cbs, cbr);
461 mutex_exit(&dd->dd_lock);
462 kmem_free((void*)cbr->cbr_propname, strlen(cbr->cbr_propname)+1);
463 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
469 * Return the number of callbacks that are registered for this dataset.
472 dsl_prop_numcb(dsl_dataset_t *ds)
474 dsl_dir_t *dd = ds->ds_dir;
475 dsl_prop_cb_record_t *cbr;
478 mutex_enter(&dd->dd_lock);
479 for (cbr = list_head(&dd->dd_prop_cbs);
480 cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
481 if (cbr->cbr_ds == ds)
484 mutex_exit(&dd->dd_lock);
490 dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
491 const char *propname, uint64_t value, int first)
494 dsl_prop_cb_record_t *cbr;
495 objset_t *mos = dp->dp_meta_objset;
500 ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock));
501 err = dsl_dir_open_obj(dp, ddobj, NULL, FTAG, &dd);
507 * If the prop is set here, then this change is not
508 * being inherited here or below; stop the recursion.
510 err = zap_contains(mos, dd->dd_phys->dd_props_zapobj, propname);
512 dsl_dir_close(dd, FTAG);
515 ASSERT3U(err, ==, ENOENT);
518 mutex_enter(&dd->dd_lock);
519 for (cbr = list_head(&dd->dd_prop_cbs); cbr;
520 cbr = list_next(&dd->dd_prop_cbs, cbr)) {
521 uint64_t propobj = cbr->cbr_ds->ds_phys->ds_props_obj;
523 if (strcmp(cbr->cbr_propname, propname) != 0)
527 * If the property is set on this ds, then it is not
528 * inherited here; don't call the callback.
530 if (propobj && 0 == zap_contains(mos, propobj, propname))
533 cbr->cbr_func(cbr->cbr_arg, value);
535 mutex_exit(&dd->dd_lock);
537 za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
538 for (zap_cursor_init(&zc, mos,
539 dd->dd_phys->dd_child_dir_zapobj);
540 zap_cursor_retrieve(&zc, za) == 0;
541 zap_cursor_advance(&zc)) {
542 dsl_prop_changed_notify(dp, za->za_first_integer,
543 propname, value, FALSE);
545 kmem_free(za, sizeof (zap_attribute_t));
546 zap_cursor_fini(&zc);
547 dsl_dir_close(dd, FTAG);
551 dsl_prop_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
553 dsl_dataset_t *ds = arg1;
554 dsl_prop_setarg_t *psa = arg2;
555 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
556 uint64_t zapobj, intval, dummy;
564 uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
565 const char *propname = psa->psa_name;
566 zprop_source_t source = psa->psa_source;
568 isint = (dodefault(propname, 8, 1, &intval) == 0);
570 if (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds)) {
571 ASSERT(version >= SPA_VERSION_SNAP_PROPS);
572 if (ds->ds_phys->ds_props_obj == 0) {
573 dmu_buf_will_dirty(ds->ds_dbuf, tx);
574 ds->ds_phys->ds_props_obj =
576 DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
578 zapobj = ds->ds_phys->ds_props_obj;
580 zapobj = ds->ds_dir->dd_phys->dd_props_zapobj;
583 if (version < SPA_VERSION_RECVD_PROPS) {
584 zfs_prop_t prop = zfs_name_to_prop(propname);
585 if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION)
588 if (source & ZPROP_SRC_NONE)
589 source = ZPROP_SRC_NONE;
590 else if (source & ZPROP_SRC_RECEIVED)
591 source = ZPROP_SRC_LOCAL;
594 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
595 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
600 * revert to received value, if any (inherit -S)
602 * - remove propname$inherit
604 err = zap_remove(mos, zapobj, propname, tx);
605 ASSERT(err == 0 || err == ENOENT);
606 err = zap_remove(mos, zapobj, inheritstr, tx);
607 ASSERT(err == 0 || err == ENOENT);
609 case ZPROP_SRC_LOCAL:
611 * remove propname$inherit
612 * set propname -> value
614 err = zap_remove(mos, zapobj, inheritstr, tx);
615 ASSERT(err == 0 || err == ENOENT);
616 VERIFY(0 == zap_update(mos, zapobj, propname,
617 psa->psa_intsz, psa->psa_numints, psa->psa_value, tx));
619 case ZPROP_SRC_INHERITED:
623 * - set propname$inherit
625 err = zap_remove(mos, zapobj, propname, tx);
626 ASSERT(err == 0 || err == ENOENT);
627 if (version >= SPA_VERSION_RECVD_PROPS &&
628 dsl_prop_get_ds(ds, ZPROP_HAS_RECVD, 8, 1, &dummy,
631 err = zap_update(mos, zapobj, inheritstr,
636 case ZPROP_SRC_RECEIVED:
638 * set propname$recvd -> value
640 err = zap_update(mos, zapobj, recvdstr,
641 psa->psa_intsz, psa->psa_numints, psa->psa_value, tx);
644 case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
646 * clear local and received settings
648 * - remove propname$inherit
649 * - remove propname$recvd
651 err = zap_remove(mos, zapobj, propname, tx);
652 ASSERT(err == 0 || err == ENOENT);
653 err = zap_remove(mos, zapobj, inheritstr, tx);
654 ASSERT(err == 0 || err == ENOENT);
656 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
658 * remove propname$recvd
660 err = zap_remove(mos, zapobj, recvdstr, tx);
661 ASSERT(err == 0 || err == ENOENT);
664 cmn_err(CE_PANIC, "unexpected property source: %d", source);
671 VERIFY(0 == dsl_prop_get_ds(ds, propname, 8, 1, &intval, NULL));
673 if (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds)) {
674 dsl_prop_cb_record_t *cbr;
676 * It's a snapshot; nothing can inherit this
677 * property, so just look for callbacks on this
680 mutex_enter(&ds->ds_dir->dd_lock);
681 for (cbr = list_head(&ds->ds_dir->dd_prop_cbs); cbr;
682 cbr = list_next(&ds->ds_dir->dd_prop_cbs, cbr)) {
683 if (cbr->cbr_ds == ds &&
684 strcmp(cbr->cbr_propname, propname) == 0)
685 cbr->cbr_func(cbr->cbr_arg, intval);
687 mutex_exit(&ds->ds_dir->dd_lock);
689 dsl_prop_changed_notify(ds->ds_dir->dd_pool,
690 ds->ds_dir->dd_object, propname, intval, TRUE);
693 (void) snprintf(valbuf, sizeof (valbuf),
694 "%lld", (longlong_t)intval);
697 if (source == ZPROP_SRC_LOCAL) {
698 valstr = (char *)psa->psa_value;
700 tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
701 if (dsl_prop_get_ds(ds, propname, 1,
702 ZAP_MAXVALUELEN, tbuf, NULL) == 0)
707 spa_history_log_internal((source == ZPROP_SRC_NONE ||
708 source == ZPROP_SRC_INHERITED) ? LOG_DS_INHERIT :
709 LOG_DS_PROPSET, ds->ds_dir->dd_pool->dp_spa, tx,
710 "%s=%s dataset = %llu", propname,
711 (valstr == NULL ? "" : valstr), ds->ds_object);
714 kmem_free(tbuf, ZAP_MAXVALUELEN);
718 dsl_props_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
720 dsl_dataset_t *ds = arg1;
721 dsl_props_arg_t *pa = arg2;
722 nvlist_t *props = pa->pa_props;
723 dsl_prop_setarg_t psa;
724 nvpair_t *elem = NULL;
726 psa.psa_source = pa->pa_source;
728 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
729 nvpair_t *pair = elem;
731 psa.psa_name = nvpair_name(pair);
733 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
735 * dsl_prop_get_all_impl() returns properties in this
739 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
740 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
744 if (nvpair_type(pair) == DATA_TYPE_STRING) {
745 VERIFY(nvpair_value_string(pair,
746 (char **)&psa.psa_value) == 0);
748 psa.psa_numints = strlen(psa.psa_value) + 1;
751 VERIFY(nvpair_value_uint64(pair, &intval) == 0);
752 psa.psa_intsz = sizeof (intval);
754 psa.psa_value = &intval;
756 dsl_prop_set_sync(ds, &psa, tx);
761 dsl_dir_prop_set_uint64_sync(dsl_dir_t *dd, const char *name, uint64_t val,
764 objset_t *mos = dd->dd_pool->dp_meta_objset;
765 uint64_t zapobj = dd->dd_phys->dd_props_zapobj;
767 ASSERT(dmu_tx_is_syncing(tx));
769 VERIFY(0 == zap_update(mos, zapobj, name, sizeof (val), 1, &val, tx));
771 dsl_prop_changed_notify(dd->dd_pool, dd->dd_object, name, val, TRUE);
773 spa_history_log_internal(LOG_DS_PROPSET, dd->dd_pool->dp_spa, tx,
774 "%s=%llu dataset = %llu", name, (u_longlong_t)val,
775 dd->dd_phys->dd_head_dataset_obj);
779 dsl_prop_set(const char *dsname, const char *propname, zprop_source_t source,
780 int intsz, int numints, const void *buf)
785 dsl_prop_setarg_t psa;
788 * We must do these checks before we get to the syncfunc, since
791 if (strlen(propname) >= ZAP_MAXNAMELEN)
792 return (ENAMETOOLONG);
794 err = dsl_dataset_hold(dsname, FTAG, &ds);
798 version = spa_version(ds->ds_dir->dd_pool->dp_spa);
799 if (intsz * numints >= (version < SPA_VERSION_STMF_PROP ?
800 ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
801 dsl_dataset_rele(ds, FTAG);
804 if (dsl_dataset_is_snapshot(ds) &&
805 version < SPA_VERSION_SNAP_PROPS) {
806 dsl_dataset_rele(ds, FTAG);
810 psa.psa_name = propname;
811 psa.psa_source = source;
812 psa.psa_intsz = intsz;
813 psa.psa_numints = numints;
815 psa.psa_effective_value = -1ULL;
817 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
818 NULL, dsl_prop_set_sync, ds, &psa, 2);
820 dsl_dataset_rele(ds, FTAG);
825 dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
829 nvpair_t *elem = NULL;
833 if ((err = dsl_dataset_hold(dsname, FTAG, &ds)))
836 * Do these checks before the syncfunc, since it can't fail.
838 version = spa_version(ds->ds_dir->dd_pool->dp_spa);
839 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
840 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
841 dsl_dataset_rele(ds, FTAG);
842 return (ENAMETOOLONG);
844 if (nvpair_type(elem) == DATA_TYPE_STRING) {
846 VERIFY(nvpair_value_string(elem, &valstr) == 0);
847 if (strlen(valstr) >= (version <
848 SPA_VERSION_STMF_PROP ?
849 ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
850 dsl_dataset_rele(ds, FTAG);
856 if (dsl_dataset_is_snapshot(ds) &&
857 version < SPA_VERSION_SNAP_PROPS) {
858 dsl_dataset_rele(ds, FTAG);
863 pa.pa_source = source;
865 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
866 NULL, dsl_props_set_sync, ds, &pa, 2);
868 dsl_dataset_rele(ds, FTAG);
872 typedef enum dsl_prop_getflags {
873 DSL_PROP_GET_INHERITING = 0x1, /* searching parent of target ds */
874 DSL_PROP_GET_SNAPSHOT = 0x2, /* snapshot dataset */
875 DSL_PROP_GET_LOCAL = 0x4, /* local properties */
876 DSL_PROP_GET_RECEIVED = 0x8 /* received properties */
877 } dsl_prop_getflags_t;
880 dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
881 const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
887 for (zap_cursor_init(&zc, mos, propobj);
888 (err = zap_cursor_retrieve(&zc, &za)) == 0;
889 zap_cursor_advance(&zc)) {
892 char buf[ZAP_MAXNAMELEN];
895 const char *propname;
898 suffix = strchr(za.za_name, '$');
900 if (suffix == NULL) {
902 * Skip local properties if we only want received
905 if (flags & DSL_PROP_GET_RECEIVED)
908 propname = za.za_name;
910 } else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
911 /* Skip explicitly inherited entries. */
913 } else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
914 if (flags & DSL_PROP_GET_LOCAL)
917 (void) strncpy(buf, za.za_name, (suffix - za.za_name));
918 buf[suffix - za.za_name] = '\0';
921 if (!(flags & DSL_PROP_GET_RECEIVED)) {
922 /* Skip if locally overridden. */
923 err = zap_contains(mos, propobj, propname);
929 /* Skip if explicitly inherited. */
930 valstr = kmem_asprintf("%s%s", propname,
931 ZPROP_INHERIT_SUFFIX);
932 err = zap_contains(mos, propobj, valstr);
940 source = ((flags & DSL_PROP_GET_INHERITING) ?
941 setpoint : ZPROP_SOURCE_VAL_RECVD);
944 * For backward compatibility, skip suffixes we don't
950 prop = zfs_name_to_prop(propname);
952 /* Skip non-inheritable properties. */
953 if ((flags & DSL_PROP_GET_INHERITING) && prop != ZPROP_INVAL &&
954 !zfs_prop_inheritable(prop))
957 /* Skip properties not valid for this type. */
958 if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_INVAL &&
959 !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT))
962 /* Skip properties already defined. */
963 if (nvlist_exists(nv, propname))
966 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
967 if (za.za_integer_length == 1) {
971 char *tmp = kmem_alloc(za.za_num_integers,
973 err = zap_lookup(mos, propobj,
974 za.za_name, 1, za.za_num_integers, tmp);
976 kmem_free(tmp, za.za_num_integers);
979 VERIFY(nvlist_add_string(propval, ZPROP_VALUE,
981 kmem_free(tmp, za.za_num_integers);
986 ASSERT(za.za_integer_length == 8);
987 (void) nvlist_add_uint64(propval, ZPROP_VALUE,
988 za.za_first_integer);
991 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, source) == 0);
992 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
993 nvlist_free(propval);
995 zap_cursor_fini(&zc);
1002 * Iterate over all properties for this dataset and return them in an nvlist.
1005 dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
1006 dsl_prop_getflags_t flags)
1008 dsl_dir_t *dd = ds->ds_dir;
1009 dsl_pool_t *dp = dd->dd_pool;
1010 objset_t *mos = dp->dp_meta_objset;
1012 char setpoint[MAXNAMELEN];
1014 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1016 if (dsl_dataset_is_snapshot(ds))
1017 flags |= DSL_PROP_GET_SNAPSHOT;
1019 rw_enter(&dp->dp_config_rwlock, RW_READER);
1021 if (ds->ds_phys->ds_props_obj != 0) {
1022 ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
1023 dsl_dataset_name(ds, setpoint);
1024 err = dsl_prop_get_all_impl(mos, ds->ds_phys->ds_props_obj,
1025 setpoint, flags, *nvp);
1030 for (; dd != NULL; dd = dd->dd_parent) {
1031 if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
1032 if (flags & (DSL_PROP_GET_LOCAL |
1033 DSL_PROP_GET_RECEIVED))
1035 flags |= DSL_PROP_GET_INHERITING;
1037 dsl_dir_name(dd, setpoint);
1038 err = dsl_prop_get_all_impl(mos, dd->dd_phys->dd_props_zapobj,
1039 setpoint, flags, *nvp);
1044 rw_exit(&dp->dp_config_rwlock);
1049 dsl_prop_get_hasrecvd(objset_t *os)
1051 dsl_dataset_t *ds = os->os_dsl_dataset;
1055 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
1056 rc = dsl_prop_get_ds(ds, ZPROP_HAS_RECVD, 8, 1, &dummy, NULL);
1057 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
1058 ASSERT(rc != 0 || spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS);
1063 dsl_prop_set_hasrecvd_impl(objset_t *os, zprop_source_t source)
1065 dsl_dataset_t *ds = os->os_dsl_dataset;
1067 dsl_prop_setarg_t psa;
1069 if (spa_version(os->os_spa) < SPA_VERSION_RECVD_PROPS)
1072 dsl_prop_setarg_init_uint64(&psa, ZPROP_HAS_RECVD, source, &dummy);
1074 (void) dsl_sync_task_do(ds->ds_dir->dd_pool, NULL,
1075 dsl_prop_set_sync, ds, &psa, 2);
1079 * Call after successfully receiving properties to ensure that only the first
1080 * receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
1083 dsl_prop_set_hasrecvd(objset_t *os)
1085 if (dsl_prop_get_hasrecvd(os)) {
1086 ASSERT(spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS);
1089 dsl_prop_set_hasrecvd_impl(os, ZPROP_SRC_LOCAL);
1093 dsl_prop_unset_hasrecvd(objset_t *os)
1095 dsl_prop_set_hasrecvd_impl(os, ZPROP_SRC_NONE);
1099 dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
1101 return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
1105 dsl_prop_get_received(objset_t *os, nvlist_t **nvp)
1108 * Received properties are not distinguishable from local properties
1109 * until the dataset has received properties on or after
1110 * SPA_VERSION_RECVD_PROPS.
1112 dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(os) ?
1113 DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
1114 return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags));
1118 dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
1121 const char *propname = zfs_prop_to_name(prop);
1122 uint64_t default_value;
1124 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1125 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1129 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1130 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1131 /* Indicate the default source if we can. */
1132 if (dodefault(propname, 8, 1, &default_value) == 0 &&
1133 value == default_value) {
1134 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, "") == 0);
1136 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1137 nvlist_free(propval);
1141 dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
1144 const char *propname = zfs_prop_to_name(prop);
1146 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1147 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1151 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1152 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1153 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1154 nvlist_free(propval);
1157 #if defined(_KERNEL) && defined(HAVE_SPL)
1158 EXPORT_SYMBOL(dsl_prop_set);
1159 EXPORT_SYMBOL(dsl_prop_get_all);
1160 EXPORT_SYMBOL(dsl_prop_nvlist_add_uint64);
1161 EXPORT_SYMBOL(dsl_prop_get_integer);