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.
23 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
24 * Copyright 2015, Joyent, Inc.
27 #include <sys/zfs_context.h>
29 #include <sys/dmu_objset.h>
30 #include <sys/dmu_tx.h>
31 #include <sys/dsl_dataset.h>
32 #include <sys/dsl_dir.h>
33 #include <sys/dsl_prop.h>
34 #include <sys/dsl_synctask.h>
37 #include <sys/fs/zfs.h>
41 #define ZPROP_INHERIT_SUFFIX "$inherit"
42 #define ZPROP_RECVD_SUFFIX "$recvd"
45 dodefault(zfs_prop_t prop, 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 == ZPROP_INVAL ||
53 (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
54 return (SET_ERROR(ENOENT));
56 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
58 return (SET_ERROR(EOVERFLOW));
59 (void) strncpy(buf, zfs_prop_default_string(prop),
62 if (intsz != 8 || numints < 1)
63 return (SET_ERROR(EOVERFLOW));
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(dsl_pool_config_held(dd->dd_pool));
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 if (dd != target || snapshot) {
105 /* Check for a local value. */
106 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
107 propname, intsz, numints, buf);
109 if (setpoint != NULL && err == 0)
110 dsl_dir_name(dd, setpoint);
115 * Skip the check for a received value if there is an explicit
118 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
120 if (err != 0 && err != ENOENT)
124 /* Check for a received value. */
125 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
126 recvdstr, intsz, numints, buf);
128 if (setpoint != NULL && err == 0) {
130 dsl_dir_name(dd, setpoint);
132 (void) strcpy(setpoint,
133 ZPROP_SOURCE_VAL_RECVD);
141 * If we found an explicit inheritance entry, err is zero even
142 * though we haven't yet found the value, so reinitializing err
143 * at the end of the loop (instead of at the beginning) ensures
144 * that err has a valid post-loop value.
146 err = SET_ERROR(ENOENT);
150 err = dodefault(prop, intsz, numints, buf);
159 dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
160 int intsz, int numints, void *buf, char *setpoint)
162 zfs_prop_t prop = zfs_name_to_prop(propname);
163 boolean_t inheritable;
166 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
167 inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
168 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
171 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
174 ASSERT(ds->ds_is_snapshot);
176 /* Check for a local value. */
177 err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
179 if (setpoint != NULL && err == 0)
180 dsl_dataset_name(ds, setpoint);
185 * Skip the check for a received value if there is an explicit
189 char *inheritstr = kmem_asprintf("%s%s", propname,
190 ZPROP_INHERIT_SUFFIX);
191 err = zap_contains(mos, zapobj, inheritstr);
193 if (err != 0 && err != ENOENT)
198 /* Check for a received value. */
199 char *recvdstr = kmem_asprintf("%s%s", propname,
201 err = zap_lookup(mos, zapobj, recvdstr,
202 intsz, numints, buf);
205 if (setpoint != NULL && err == 0)
206 (void) strcpy(setpoint,
207 ZPROP_SOURCE_VAL_RECVD);
213 return (dsl_prop_get_dd(ds->ds_dir, propname,
214 intsz, numints, buf, setpoint, ds->ds_is_snapshot));
217 static dsl_prop_record_t *
218 dsl_prop_record_find(dsl_dir_t *dd, const char *propname)
220 dsl_prop_record_t *pr = NULL;
222 ASSERT(MUTEX_HELD(&dd->dd_lock));
224 for (pr = list_head(&dd->dd_props);
225 pr != NULL; pr = list_next(&dd->dd_props, pr)) {
226 if (strcmp(pr->pr_propname, propname) == 0)
233 static dsl_prop_record_t *
234 dsl_prop_record_create(dsl_dir_t *dd, const char *propname)
236 dsl_prop_record_t *pr;
238 ASSERT(MUTEX_HELD(&dd->dd_lock));
240 pr = kmem_alloc(sizeof (dsl_prop_record_t), KM_SLEEP);
241 pr->pr_propname = spa_strdup(propname);
242 list_create(&pr->pr_cbs, sizeof (dsl_prop_cb_record_t),
243 offsetof(dsl_prop_cb_record_t, cbr_pr_node));
244 list_insert_head(&dd->dd_props, pr);
250 dsl_prop_init(dsl_dir_t *dd)
252 list_create(&dd->dd_props, sizeof (dsl_prop_record_t),
253 offsetof(dsl_prop_record_t, pr_node));
257 dsl_prop_fini(dsl_dir_t *dd)
259 dsl_prop_record_t *pr;
261 while ((pr = list_remove_head(&dd->dd_props)) != NULL) {
262 list_destroy(&pr->pr_cbs);
263 strfree((char *)pr->pr_propname);
264 kmem_free(pr, sizeof (dsl_prop_record_t));
266 list_destroy(&dd->dd_props);
270 * Register interest in the named property. We'll call the callback
271 * once to notify it of the current property value, and again each time
272 * the property changes, until this callback is unregistered.
274 * Return 0 on success, errno if the prop is not an integer value.
277 dsl_prop_register(dsl_dataset_t *ds, const char *propname,
278 dsl_prop_changed_cb_t *callback, void *cbarg)
280 dsl_dir_t *dd = ds->ds_dir;
281 dsl_pool_t *dp = dd->dd_pool;
283 dsl_prop_record_t *pr;
284 dsl_prop_cb_record_t *cbr;
287 ASSERT(dsl_pool_config_held(dp));
289 err = dsl_prop_get_int_ds(ds, propname, &value);
293 cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
295 cbr->cbr_func = callback;
296 cbr->cbr_arg = cbarg;
298 mutex_enter(&dd->dd_lock);
299 pr = dsl_prop_record_find(dd, propname);
301 pr = dsl_prop_record_create(dd, propname);
303 list_insert_head(&pr->pr_cbs, cbr);
304 list_insert_head(&ds->ds_prop_cbs, cbr);
305 mutex_exit(&dd->dd_lock);
307 cbr->cbr_func(cbr->cbr_arg, value);
312 dsl_prop_get(const char *dsname, const char *propname,
313 int intsz, int numints, void *buf, char *setpoint)
318 error = dmu_objset_hold(dsname, FTAG, &os);
322 error = dsl_prop_get_ds(dmu_objset_ds(os), propname,
323 intsz, numints, buf, setpoint);
325 dmu_objset_rele(os, FTAG);
330 * Get the current property value. It may have changed by the time this
331 * function returns, so it is NOT safe to follow up with
332 * dsl_prop_register() and assume that the value has not changed in
335 * Return 0 on success, ENOENT if ddname is invalid.
338 dsl_prop_get_integer(const char *ddname, const char *propname,
339 uint64_t *valuep, char *setpoint)
341 return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
345 dsl_prop_get_int_ds(dsl_dataset_t *ds, const char *propname,
348 return (dsl_prop_get_ds(ds, propname, 8, 1, valuep, NULL));
352 * Predict the effective value of the given special property if it were set with
353 * the given value and source. This is not a general purpose function. It exists
354 * only to handle the special requirements of the quota and reservation
355 * properties. The fact that these properties are non-inheritable greatly
356 * simplifies the prediction logic.
358 * Returns 0 on success, a positive error code on failure, or -1 if called with
359 * a property not handled by this function.
362 dsl_prop_predict(dsl_dir_t *dd, const char *propname,
363 zprop_source_t source, uint64_t value, uint64_t *newvalp)
365 zfs_prop_t prop = zfs_name_to_prop(propname);
374 case ZFS_PROP_RESERVATION:
375 case ZFS_PROP_REFQUOTA:
376 case ZFS_PROP_REFRESERVATION:
382 mos = dd->dd_pool->dp_meta_objset;
383 zapobj = dsl_dir_phys(dd)->dd_props_zapobj;
384 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
386 version = spa_version(dd->dd_pool->dp_spa);
387 if (version < SPA_VERSION_RECVD_PROPS) {
388 if (source & ZPROP_SRC_NONE)
389 source = ZPROP_SRC_NONE;
390 else if (source & ZPROP_SRC_RECEIVED)
391 source = ZPROP_SRC_LOCAL;
396 /* Revert to the received value, if any. */
397 err = zap_lookup(mos, zapobj, recvdstr, 8, 1, newvalp);
401 case ZPROP_SRC_LOCAL:
404 case ZPROP_SRC_RECEIVED:
406 * If there's no local setting, then the new received value will
407 * be the effective value.
409 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
413 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
415 * We're clearing the received value, so the local setting (if
416 * it exists) remains the effective value.
418 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
423 panic("unexpected property source: %d", source);
435 * Unregister all callbacks that are registered with the
436 * given callback argument.
439 dsl_prop_unregister_all(dsl_dataset_t *ds, void *cbarg)
441 dsl_prop_cb_record_t *cbr, *next_cbr;
443 dsl_dir_t *dd = ds->ds_dir;
445 mutex_enter(&dd->dd_lock);
446 next_cbr = list_head(&ds->ds_prop_cbs);
447 while (next_cbr != NULL) {
449 next_cbr = list_next(&ds->ds_prop_cbs, cbr);
450 if (cbr->cbr_arg == cbarg) {
451 list_remove(&ds->ds_prop_cbs, cbr);
452 list_remove(&cbr->cbr_pr->pr_cbs, cbr);
453 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
456 mutex_exit(&dd->dd_lock);
460 dsl_prop_hascb(dsl_dataset_t *ds)
462 return (!list_is_empty(&ds->ds_prop_cbs));
467 dsl_prop_notify_all_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
469 dsl_dir_t *dd = ds->ds_dir;
470 dsl_prop_record_t *pr;
471 dsl_prop_cb_record_t *cbr;
473 mutex_enter(&dd->dd_lock);
474 for (pr = list_head(&dd->dd_props);
475 pr; pr = list_next(&dd->dd_props, pr)) {
476 for (cbr = list_head(&pr->pr_cbs); cbr;
477 cbr = list_next(&pr->pr_cbs, cbr)) {
481 * Callback entries do not have holds on their
482 * datasets so that datasets with registered
483 * callbacks are still eligible for eviction.
484 * Unlike operations to update properties on a
485 * single dataset, we are performing a recursive
486 * descent of related head datasets. The caller
487 * of this function only has a dataset hold on
488 * the passed in head dataset, not the snapshots
489 * associated with this dataset. Without a hold,
490 * the dataset pointer within callback records
491 * for snapshots can be invalidated by eviction
494 * Use dsl_dataset_try_add_ref() to verify
495 * that the dataset for a snapshot has not
496 * begun eviction processing and to prevent
497 * eviction from occurring for the duration of
498 * the callback. If the hold attempt fails,
499 * this object is already being evicted and the
500 * callback can be safely ignored.
502 if (ds != cbr->cbr_ds &&
503 !dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
506 if (dsl_prop_get_ds(cbr->cbr_ds,
507 cbr->cbr_pr->pr_propname, sizeof (value), 1,
509 cbr->cbr_func(cbr->cbr_arg, value);
511 if (ds != cbr->cbr_ds)
512 dsl_dataset_rele(cbr->cbr_ds, FTAG);
515 mutex_exit(&dd->dd_lock);
521 * Update all property values for ddobj & its descendants. This is used
522 * when renaming the dir.
525 dsl_prop_notify_all(dsl_dir_t *dd)
527 dsl_pool_t *dp = dd->dd_pool;
528 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
529 (void) dmu_objset_find_dp(dp, dd->dd_object, dsl_prop_notify_all_cb,
530 NULL, DS_FIND_CHILDREN);
534 dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
535 const char *propname, uint64_t value, int first)
538 dsl_prop_record_t *pr;
539 dsl_prop_cb_record_t *cbr;
540 objset_t *mos = dp->dp_meta_objset;
545 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
546 err = dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd);
552 * If the prop is set here, then this change is not
553 * being inherited here or below; stop the recursion.
555 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
558 dsl_dir_rele(dd, FTAG);
561 ASSERT3U(err, ==, ENOENT);
564 mutex_enter(&dd->dd_lock);
565 pr = dsl_prop_record_find(dd, propname);
567 for (cbr = list_head(&pr->pr_cbs); cbr;
568 cbr = list_next(&pr->pr_cbs, cbr)) {
572 * cbr->cbr_ds may be invalidated due to eviction,
573 * requiring the use of dsl_dataset_try_add_ref().
574 * See comment block in dsl_prop_notify_all_cb()
577 if (!dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
580 propobj = dsl_dataset_phys(cbr->cbr_ds)->ds_props_obj;
583 * If the property is not set on this ds, then it is
584 * inherited here; call the callback.
587 zap_contains(mos, propobj, propname) != 0)
588 cbr->cbr_func(cbr->cbr_arg, value);
590 dsl_dataset_rele(cbr->cbr_ds, FTAG);
593 mutex_exit(&dd->dd_lock);
595 za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
596 for (zap_cursor_init(&zc, mos,
597 dsl_dir_phys(dd)->dd_child_dir_zapobj);
598 zap_cursor_retrieve(&zc, za) == 0;
599 zap_cursor_advance(&zc)) {
600 dsl_prop_changed_notify(dp, za->za_first_integer,
601 propname, value, FALSE);
603 kmem_free(za, sizeof (zap_attribute_t));
604 zap_cursor_fini(&zc);
605 dsl_dir_rele(dd, FTAG);
609 dsl_prop_set_sync_impl(dsl_dataset_t *ds, const char *propname,
610 zprop_source_t source, int intsz, int numints, const void *value,
613 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
614 uint64_t zapobj, intval, dummy;
617 const char *valstr = NULL;
622 uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
624 isint = (dodefault(zfs_name_to_prop(propname), 8, 1, &intval) == 0);
626 if (ds->ds_is_snapshot) {
627 ASSERT(version >= SPA_VERSION_SNAP_PROPS);
628 if (dsl_dataset_phys(ds)->ds_props_obj == 0) {
629 dmu_buf_will_dirty(ds->ds_dbuf, tx);
630 dsl_dataset_phys(ds)->ds_props_obj =
632 DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
634 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
636 zapobj = dsl_dir_phys(ds->ds_dir)->dd_props_zapobj;
639 if (version < SPA_VERSION_RECVD_PROPS) {
640 if (source & ZPROP_SRC_NONE)
641 source = ZPROP_SRC_NONE;
642 else if (source & ZPROP_SRC_RECEIVED)
643 source = ZPROP_SRC_LOCAL;
646 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
647 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
652 * revert to received value, if any (inherit -S)
654 * - remove propname$inherit
656 err = zap_remove(mos, zapobj, propname, tx);
657 ASSERT(err == 0 || err == ENOENT);
658 err = zap_remove(mos, zapobj, inheritstr, tx);
659 ASSERT(err == 0 || err == ENOENT);
661 case ZPROP_SRC_LOCAL:
663 * remove propname$inherit
664 * set propname -> value
666 err = zap_remove(mos, zapobj, inheritstr, tx);
667 ASSERT(err == 0 || err == ENOENT);
668 VERIFY0(zap_update(mos, zapobj, propname,
669 intsz, numints, value, tx));
671 case ZPROP_SRC_INHERITED:
675 * - set propname$inherit
677 err = zap_remove(mos, zapobj, propname, tx);
678 ASSERT(err == 0 || err == ENOENT);
679 if (version >= SPA_VERSION_RECVD_PROPS &&
680 dsl_prop_get_int_ds(ds, ZPROP_HAS_RECVD, &dummy) == 0) {
682 VERIFY0(zap_update(mos, zapobj, inheritstr,
686 case ZPROP_SRC_RECEIVED:
688 * set propname$recvd -> value
690 err = zap_update(mos, zapobj, recvdstr,
691 intsz, numints, value, tx);
694 case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
696 * clear local and received settings
698 * - remove propname$inherit
699 * - remove propname$recvd
701 err = zap_remove(mos, zapobj, propname, tx);
702 ASSERT(err == 0 || err == ENOENT);
703 err = zap_remove(mos, zapobj, inheritstr, tx);
704 ASSERT(err == 0 || err == ENOENT);
706 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
708 * remove propname$recvd
710 err = zap_remove(mos, zapobj, recvdstr, tx);
711 ASSERT(err == 0 || err == ENOENT);
714 cmn_err(CE_PANIC, "unexpected property source: %d", source);
721 VERIFY0(dsl_prop_get_int_ds(ds, propname, &intval));
723 if (ds->ds_is_snapshot) {
724 dsl_prop_cb_record_t *cbr;
726 * It's a snapshot; nothing can inherit this
727 * property, so just look for callbacks on this
730 mutex_enter(&ds->ds_dir->dd_lock);
731 for (cbr = list_head(&ds->ds_prop_cbs); cbr;
732 cbr = list_next(&ds->ds_prop_cbs, cbr)) {
733 if (strcmp(cbr->cbr_pr->pr_propname,
735 cbr->cbr_func(cbr->cbr_arg, intval);
737 mutex_exit(&ds->ds_dir->dd_lock);
739 dsl_prop_changed_notify(ds->ds_dir->dd_pool,
740 ds->ds_dir->dd_object, propname, intval, TRUE);
743 (void) snprintf(valbuf, sizeof (valbuf),
744 "%lld", (longlong_t)intval);
747 if (source == ZPROP_SRC_LOCAL) {
750 tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
751 if (dsl_prop_get_ds(ds, propname, 1,
752 ZAP_MAXVALUELEN, tbuf, NULL) == 0)
757 spa_history_log_internal_ds(ds, (source == ZPROP_SRC_NONE ||
758 source == ZPROP_SRC_INHERITED) ? "inherit" : "set", tx,
759 "%s=%s", propname, (valstr == NULL ? "" : valstr));
762 kmem_free(tbuf, ZAP_MAXVALUELEN);
766 dsl_prop_set_int(const char *dsname, const char *propname,
767 zprop_source_t source, uint64_t value)
769 nvlist_t *nvl = fnvlist_alloc();
772 fnvlist_add_uint64(nvl, propname, value);
773 error = dsl_props_set(dsname, source, nvl);
779 dsl_prop_set_string(const char *dsname, const char *propname,
780 zprop_source_t source, const char *value)
782 nvlist_t *nvl = fnvlist_alloc();
785 fnvlist_add_string(nvl, propname, value);
786 error = dsl_props_set(dsname, source, nvl);
792 dsl_prop_inherit(const char *dsname, const char *propname,
793 zprop_source_t source)
795 nvlist_t *nvl = fnvlist_alloc();
798 fnvlist_add_boolean(nvl, propname);
799 error = dsl_props_set(dsname, source, nvl);
804 typedef struct dsl_props_set_arg {
805 const char *dpsa_dsname;
806 zprop_source_t dpsa_source;
807 nvlist_t *dpsa_props;
808 } dsl_props_set_arg_t;
811 dsl_props_set_check(void *arg, dmu_tx_t *tx)
813 dsl_props_set_arg_t *dpsa = arg;
814 dsl_pool_t *dp = dmu_tx_pool(tx);
817 nvpair_t *elem = NULL;
820 err = dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds);
824 version = spa_version(ds->ds_dir->dd_pool->dp_spa);
825 while ((elem = nvlist_next_nvpair(dpsa->dpsa_props, elem)) != NULL) {
826 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
827 dsl_dataset_rele(ds, FTAG);
828 return (SET_ERROR(ENAMETOOLONG));
830 if (nvpair_type(elem) == DATA_TYPE_STRING) {
831 char *valstr = fnvpair_value_string(elem);
832 if (strlen(valstr) >= (version <
833 SPA_VERSION_STMF_PROP ?
834 ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
835 dsl_dataset_rele(ds, FTAG);
841 if (ds->ds_is_snapshot && version < SPA_VERSION_SNAP_PROPS) {
842 dsl_dataset_rele(ds, FTAG);
843 return (SET_ERROR(ENOTSUP));
845 dsl_dataset_rele(ds, FTAG);
850 dsl_props_set_sync_impl(dsl_dataset_t *ds, zprop_source_t source,
851 nvlist_t *props, dmu_tx_t *tx)
853 nvpair_t *elem = NULL;
855 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
856 nvpair_t *pair = elem;
858 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
860 * dsl_prop_get_all_impl() returns properties in this
863 nvlist_t *attrs = fnvpair_value_nvlist(pair);
864 pair = fnvlist_lookup_nvpair(attrs, ZPROP_VALUE);
867 if (nvpair_type(pair) == DATA_TYPE_STRING) {
868 const char *value = fnvpair_value_string(pair);
869 dsl_prop_set_sync_impl(ds, nvpair_name(pair),
870 source, 1, strlen(value) + 1, value, tx);
871 } else if (nvpair_type(pair) == DATA_TYPE_UINT64) {
872 uint64_t intval = fnvpair_value_uint64(pair);
873 dsl_prop_set_sync_impl(ds, nvpair_name(pair),
874 source, sizeof (intval), 1, &intval, tx);
875 } else if (nvpair_type(pair) == DATA_TYPE_BOOLEAN) {
876 dsl_prop_set_sync_impl(ds, nvpair_name(pair),
877 source, 0, 0, NULL, tx);
879 panic("invalid nvpair type");
885 dsl_props_set_sync(void *arg, dmu_tx_t *tx)
887 dsl_props_set_arg_t *dpsa = arg;
888 dsl_pool_t *dp = dmu_tx_pool(tx);
891 VERIFY0(dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds));
892 dsl_props_set_sync_impl(ds, dpsa->dpsa_source, dpsa->dpsa_props, tx);
893 dsl_dataset_rele(ds, FTAG);
897 * All-or-nothing; if any prop can't be set, nothing will be modified.
900 dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
902 dsl_props_set_arg_t dpsa;
905 dpsa.dpsa_dsname = dsname;
906 dpsa.dpsa_source = source;
907 dpsa.dpsa_props = props;
910 * If the source includes NONE, then we will only be removing entries
911 * from the ZAP object. In that case don't check for ENOSPC.
913 if ((source & ZPROP_SRC_NONE) == 0)
914 nblks = 2 * fnvlist_num_pairs(props);
916 return (dsl_sync_task(dsname, dsl_props_set_check, dsl_props_set_sync,
917 &dpsa, nblks, ZFS_SPACE_CHECK_RESERVED));
920 typedef enum dsl_prop_getflags {
921 DSL_PROP_GET_INHERITING = 0x1, /* searching parent of target ds */
922 DSL_PROP_GET_SNAPSHOT = 0x2, /* snapshot dataset */
923 DSL_PROP_GET_LOCAL = 0x4, /* local properties */
924 DSL_PROP_GET_RECEIVED = 0x8 /* received properties */
925 } dsl_prop_getflags_t;
928 dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
929 const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
935 for (zap_cursor_init(&zc, mos, propobj);
936 (err = zap_cursor_retrieve(&zc, &za)) == 0;
937 zap_cursor_advance(&zc)) {
940 char buf[ZAP_MAXNAMELEN];
943 const char *propname;
946 suffix = strchr(za.za_name, '$');
948 if (suffix == NULL) {
950 * Skip local properties if we only want received
953 if (flags & DSL_PROP_GET_RECEIVED)
956 propname = za.za_name;
958 } else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
959 /* Skip explicitly inherited entries. */
961 } else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
962 if (flags & DSL_PROP_GET_LOCAL)
965 (void) strncpy(buf, za.za_name, (suffix - za.za_name));
966 buf[suffix - za.za_name] = '\0';
969 if (!(flags & DSL_PROP_GET_RECEIVED)) {
970 /* Skip if locally overridden. */
971 err = zap_contains(mos, propobj, propname);
977 /* Skip if explicitly inherited. */
978 valstr = kmem_asprintf("%s%s", propname,
979 ZPROP_INHERIT_SUFFIX);
980 err = zap_contains(mos, propobj, valstr);
988 source = ((flags & DSL_PROP_GET_INHERITING) ?
989 setpoint : ZPROP_SOURCE_VAL_RECVD);
992 * For backward compatibility, skip suffixes we don't
998 prop = zfs_name_to_prop(propname);
1000 /* Skip non-inheritable properties. */
1001 if ((flags & DSL_PROP_GET_INHERITING) && prop != ZPROP_INVAL &&
1002 !zfs_prop_inheritable(prop))
1005 /* Skip properties not valid for this type. */
1006 if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_INVAL &&
1007 !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT))
1010 /* Skip properties already defined. */
1011 if (nvlist_exists(nv, propname))
1014 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1015 if (za.za_integer_length == 1) {
1019 char *tmp = kmem_alloc(za.za_num_integers,
1021 err = zap_lookup(mos, propobj,
1022 za.za_name, 1, za.za_num_integers, tmp);
1024 kmem_free(tmp, za.za_num_integers);
1027 VERIFY(nvlist_add_string(propval, ZPROP_VALUE,
1029 kmem_free(tmp, za.za_num_integers);
1034 ASSERT(za.za_integer_length == 8);
1035 (void) nvlist_add_uint64(propval, ZPROP_VALUE,
1036 za.za_first_integer);
1039 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, source) == 0);
1040 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1041 nvlist_free(propval);
1043 zap_cursor_fini(&zc);
1050 * Iterate over all properties for this dataset and return them in an nvlist.
1053 dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
1054 dsl_prop_getflags_t flags)
1056 dsl_dir_t *dd = ds->ds_dir;
1057 dsl_pool_t *dp = dd->dd_pool;
1058 objset_t *mos = dp->dp_meta_objset;
1060 char setpoint[MAXNAMELEN];
1062 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1064 if (ds->ds_is_snapshot)
1065 flags |= DSL_PROP_GET_SNAPSHOT;
1067 ASSERT(dsl_pool_config_held(dp));
1069 if (dsl_dataset_phys(ds)->ds_props_obj != 0) {
1070 ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
1071 dsl_dataset_name(ds, setpoint);
1072 err = dsl_prop_get_all_impl(mos,
1073 dsl_dataset_phys(ds)->ds_props_obj, setpoint, flags, *nvp);
1078 for (; dd != NULL; dd = dd->dd_parent) {
1079 if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
1080 if (flags & (DSL_PROP_GET_LOCAL |
1081 DSL_PROP_GET_RECEIVED))
1083 flags |= DSL_PROP_GET_INHERITING;
1085 dsl_dir_name(dd, setpoint);
1086 err = dsl_prop_get_all_impl(mos,
1087 dsl_dir_phys(dd)->dd_props_zapobj, setpoint, flags, *nvp);
1096 dsl_prop_get_hasrecvd(const char *dsname)
1101 dsl_prop_get_integer(dsname, ZPROP_HAS_RECVD, &dummy, NULL));
1105 dsl_prop_set_hasrecvd_impl(const char *dsname, zprop_source_t source)
1111 VERIFY0(spa_open(dsname, &spa, FTAG));
1112 version = spa_version(spa);
1113 spa_close(spa, FTAG);
1115 if (version >= SPA_VERSION_RECVD_PROPS)
1116 error = dsl_prop_set_int(dsname, ZPROP_HAS_RECVD, source, 0);
1121 * Call after successfully receiving properties to ensure that only the first
1122 * receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
1125 dsl_prop_set_hasrecvd(const char *dsname)
1128 if (!dsl_prop_get_hasrecvd(dsname))
1129 error = dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_LOCAL);
1134 dsl_prop_unset_hasrecvd(const char *dsname)
1136 VERIFY0(dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_NONE));
1140 dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
1142 return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
1146 dsl_prop_get_received(const char *dsname, nvlist_t **nvp)
1152 * Received properties are not distinguishable from local properties
1153 * until the dataset has received properties on or after
1154 * SPA_VERSION_RECVD_PROPS.
1156 dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(dsname) ?
1157 DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
1159 error = dmu_objset_hold(dsname, FTAG, &os);
1162 error = dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags);
1163 dmu_objset_rele(os, FTAG);
1168 dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
1171 const char *propname = zfs_prop_to_name(prop);
1172 uint64_t default_value;
1174 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1175 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1179 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1180 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1181 /* Indicate the default source if we can. */
1182 if (dodefault(prop, 8, 1, &default_value) == 0 &&
1183 value == default_value) {
1184 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, "") == 0);
1186 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1187 nvlist_free(propval);
1191 dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
1194 const char *propname = zfs_prop_to_name(prop);
1196 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1197 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1201 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1202 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1203 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1204 nvlist_free(propval);