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.
26 #include <sys/zfs_context.h>
28 #include <sys/dmu_objset.h>
29 #include <sys/dmu_tx.h>
30 #include <sys/dsl_dataset.h>
31 #include <sys/dsl_dir.h>
32 #include <sys/dsl_prop.h>
33 #include <sys/dsl_synctask.h>
36 #include <sys/fs/zfs.h>
40 #define ZPROP_INHERIT_SUFFIX "$inherit"
41 #define ZPROP_RECVD_SUFFIX "$recvd"
44 dodefault(const char *propname, int intsz, int numints, void *buf)
49 * The setonce properties are read-only, BUT they still
50 * have a default value that can be used as the initial
53 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL ||
54 (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
55 return (SET_ERROR(ENOENT));
57 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
59 return (SET_ERROR(EOVERFLOW));
60 (void) strncpy(buf, zfs_prop_default_string(prop),
63 if (intsz != 8 || numints < 1)
64 return (SET_ERROR(EOVERFLOW));
66 *(uint64_t *)buf = zfs_prop_default_numeric(prop);
73 dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
74 int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
77 dsl_dir_t *target = dd;
78 objset_t *mos = dd->dd_pool->dp_meta_objset;
80 boolean_t inheritable;
81 boolean_t inheriting = B_FALSE;
85 ASSERT(dsl_pool_config_held(dd->dd_pool));
90 prop = zfs_name_to_prop(propname);
91 inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
92 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
93 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
96 * Note: dd may become NULL, therefore we shouldn't dereference it
99 for (; dd != NULL; dd = dd->dd_parent) {
100 if (dd != target || snapshot) {
106 /* Check for a local value. */
107 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
108 propname, intsz, numints, buf);
110 if (setpoint != NULL && err == 0)
111 dsl_dir_name(dd, setpoint);
116 * Skip the check for a received value if there is an explicit
119 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
121 if (err != 0 && err != ENOENT)
125 /* Check for a received value. */
126 err = zap_lookup(mos, dsl_dir_phys(dd)->dd_props_zapobj,
127 recvdstr, intsz, numints, buf);
129 if (setpoint != NULL && err == 0) {
131 dsl_dir_name(dd, setpoint);
133 (void) strcpy(setpoint,
134 ZPROP_SOURCE_VAL_RECVD);
142 * If we found an explicit inheritance entry, err is zero even
143 * though we haven't yet found the value, so reinitializing err
144 * at the end of the loop (instead of at the beginning) ensures
145 * that err has a valid post-loop value.
147 err = SET_ERROR(ENOENT);
151 err = dodefault(propname, intsz, numints, buf);
160 dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
161 int intsz, int numints, void *buf, char *setpoint)
163 zfs_prop_t prop = zfs_name_to_prop(propname);
164 boolean_t inheritable;
168 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
169 inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
170 snapshot = dsl_dataset_is_snapshot(ds);
171 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
174 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
179 /* Check for a local value. */
180 err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
182 if (setpoint != NULL && err == 0)
183 dsl_dataset_name(ds, setpoint);
188 * Skip the check for a received value if there is an explicit
192 char *inheritstr = kmem_asprintf("%s%s", propname,
193 ZPROP_INHERIT_SUFFIX);
194 err = zap_contains(mos, zapobj, inheritstr);
196 if (err != 0 && err != ENOENT)
201 /* Check for a received value. */
202 char *recvdstr = kmem_asprintf("%s%s", propname,
204 err = zap_lookup(mos, zapobj, recvdstr,
205 intsz, numints, buf);
208 if (setpoint != NULL && err == 0)
209 (void) strcpy(setpoint,
210 ZPROP_SOURCE_VAL_RECVD);
216 return (dsl_prop_get_dd(ds->ds_dir, propname,
217 intsz, numints, buf, setpoint, snapshot));
221 * Register interest in the named property. We'll call the callback
222 * once to notify it of the current property value, and again each time
223 * the property changes, until this callback is unregistered.
225 * Return 0 on success, errno if the prop is not an integer value.
228 dsl_prop_register(dsl_dataset_t *ds, const char *propname,
229 dsl_prop_changed_cb_t *callback, void *cbarg)
231 dsl_dir_t *dd = ds->ds_dir;
232 dsl_pool_t *dp = dd->dd_pool;
234 dsl_prop_cb_record_t *cbr;
237 ASSERT(dsl_pool_config_held(dp));
239 err = dsl_prop_get_int_ds(ds, propname, &value);
243 cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
245 cbr->cbr_propname = kmem_alloc(strlen(propname)+1, KM_SLEEP);
246 (void) strcpy((char *)cbr->cbr_propname, propname);
247 cbr->cbr_func = callback;
248 cbr->cbr_arg = cbarg;
249 mutex_enter(&dd->dd_lock);
250 list_insert_head(&dd->dd_prop_cbs, cbr);
251 mutex_exit(&dd->dd_lock);
253 cbr->cbr_func(cbr->cbr_arg, value);
258 dsl_prop_get(const char *dsname, const char *propname,
259 int intsz, int numints, void *buf, char *setpoint)
264 error = dmu_objset_hold(dsname, FTAG, &os);
268 error = dsl_prop_get_ds(dmu_objset_ds(os), propname,
269 intsz, numints, buf, setpoint);
271 dmu_objset_rele(os, FTAG);
276 * Get the current property value. It may have changed by the time this
277 * function returns, so it is NOT safe to follow up with
278 * dsl_prop_register() and assume that the value has not changed in
281 * Return 0 on success, ENOENT if ddname is invalid.
284 dsl_prop_get_integer(const char *ddname, const char *propname,
285 uint64_t *valuep, char *setpoint)
287 return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
291 dsl_prop_get_int_ds(dsl_dataset_t *ds, const char *propname,
294 return (dsl_prop_get_ds(ds, propname, 8, 1, valuep, NULL));
298 * Predict the effective value of the given special property if it were set with
299 * the given value and source. This is not a general purpose function. It exists
300 * only to handle the special requirements of the quota and reservation
301 * properties. The fact that these properties are non-inheritable greatly
302 * simplifies the prediction logic.
304 * Returns 0 on success, a positive error code on failure, or -1 if called with
305 * a property not handled by this function.
308 dsl_prop_predict(dsl_dir_t *dd, const char *propname,
309 zprop_source_t source, uint64_t value, uint64_t *newvalp)
311 zfs_prop_t prop = zfs_name_to_prop(propname);
320 case ZFS_PROP_RESERVATION:
321 case ZFS_PROP_REFQUOTA:
322 case ZFS_PROP_REFRESERVATION:
328 mos = dd->dd_pool->dp_meta_objset;
329 zapobj = dsl_dir_phys(dd)->dd_props_zapobj;
330 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
332 version = spa_version(dd->dd_pool->dp_spa);
333 if (version < SPA_VERSION_RECVD_PROPS) {
334 if (source & ZPROP_SRC_NONE)
335 source = ZPROP_SRC_NONE;
336 else if (source & ZPROP_SRC_RECEIVED)
337 source = ZPROP_SRC_LOCAL;
342 /* Revert to the received value, if any. */
343 err = zap_lookup(mos, zapobj, recvdstr, 8, 1, newvalp);
347 case ZPROP_SRC_LOCAL:
350 case ZPROP_SRC_RECEIVED:
352 * If there's no local setting, then the new received value will
353 * be the effective value.
355 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
359 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
361 * We're clearing the received value, so the local setting (if
362 * it exists) remains the effective value.
364 err = zap_lookup(mos, zapobj, propname, 8, 1, newvalp);
369 panic("unexpected property source: %d", source);
381 * Unregister this callback. Return 0 on success, ENOENT if ddname is
382 * invalid, or ENOMSG if no matching callback registered.
385 dsl_prop_unregister(dsl_dataset_t *ds, const char *propname,
386 dsl_prop_changed_cb_t *callback, void *cbarg)
388 dsl_dir_t *dd = ds->ds_dir;
389 dsl_prop_cb_record_t *cbr;
391 mutex_enter(&dd->dd_lock);
392 for (cbr = list_head(&dd->dd_prop_cbs);
393 cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
394 if (cbr->cbr_ds == ds &&
395 cbr->cbr_func == callback &&
396 cbr->cbr_arg == cbarg &&
397 strcmp(cbr->cbr_propname, propname) == 0)
402 mutex_exit(&dd->dd_lock);
403 return (SET_ERROR(ENOMSG));
406 list_remove(&dd->dd_prop_cbs, cbr);
407 mutex_exit(&dd->dd_lock);
408 kmem_free((void*)cbr->cbr_propname, strlen(cbr->cbr_propname)+1);
409 kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
415 dsl_prop_hascb(dsl_dataset_t *ds)
417 dsl_dir_t *dd = ds->ds_dir;
418 boolean_t rv = B_FALSE;
419 dsl_prop_cb_record_t *cbr;
421 mutex_enter(&dd->dd_lock);
422 for (cbr = list_head(&dd->dd_prop_cbs); cbr;
423 cbr = list_next(&dd->dd_prop_cbs, cbr)) {
424 if (cbr->cbr_ds == ds) {
429 mutex_exit(&dd->dd_lock);
435 dsl_prop_notify_all_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
437 dsl_dir_t *dd = ds->ds_dir;
438 dsl_prop_cb_record_t *cbr;
440 mutex_enter(&dd->dd_lock);
441 for (cbr = list_head(&dd->dd_prop_cbs); cbr;
442 cbr = list_next(&dd->dd_prop_cbs, cbr)) {
445 if (dsl_prop_get_ds(cbr->cbr_ds, cbr->cbr_propname,
446 sizeof (value), 1, &value, NULL) == 0)
447 cbr->cbr_func(cbr->cbr_arg, value);
449 mutex_exit(&dd->dd_lock);
455 * Update all property values for ddobj & its descendants. This is used
456 * when renaming the dir.
459 dsl_prop_notify_all(dsl_dir_t *dd)
461 dsl_pool_t *dp = dd->dd_pool;
462 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
463 (void) dmu_objset_find_dp(dp, dd->dd_object, dsl_prop_notify_all_cb,
464 NULL, DS_FIND_CHILDREN);
468 dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
469 const char *propname, uint64_t value, int first)
472 dsl_prop_cb_record_t *cbr;
473 objset_t *mos = dp->dp_meta_objset;
478 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
479 err = dsl_dir_hold_obj(dp, ddobj, NULL, FTAG, &dd);
485 * If the prop is set here, then this change is not
486 * being inherited here or below; stop the recursion.
488 err = zap_contains(mos, dsl_dir_phys(dd)->dd_props_zapobj,
491 dsl_dir_rele(dd, FTAG);
494 ASSERT3U(err, ==, ENOENT);
497 mutex_enter(&dd->dd_lock);
498 for (cbr = list_head(&dd->dd_prop_cbs); cbr;
499 cbr = list_next(&dd->dd_prop_cbs, cbr)) {
500 uint64_t propobj = dsl_dataset_phys(cbr->cbr_ds)->ds_props_obj;
502 if (strcmp(cbr->cbr_propname, propname) != 0)
506 * If the property is set on this ds, then it is not
507 * inherited here; don't call the callback.
509 if (propobj && 0 == zap_contains(mos, propobj, propname))
512 cbr->cbr_func(cbr->cbr_arg, value);
514 mutex_exit(&dd->dd_lock);
516 za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
517 for (zap_cursor_init(&zc, mos,
518 dsl_dir_phys(dd)->dd_child_dir_zapobj);
519 zap_cursor_retrieve(&zc, za) == 0;
520 zap_cursor_advance(&zc)) {
521 dsl_prop_changed_notify(dp, za->za_first_integer,
522 propname, value, FALSE);
524 kmem_free(za, sizeof (zap_attribute_t));
525 zap_cursor_fini(&zc);
526 dsl_dir_rele(dd, FTAG);
530 dsl_prop_set_sync_impl(dsl_dataset_t *ds, const char *propname,
531 zprop_source_t source, int intsz, int numints, const void *value,
534 objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
535 uint64_t zapobj, intval, dummy;
538 const char *valstr = NULL;
543 uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
545 isint = (dodefault(propname, 8, 1, &intval) == 0);
547 if (dsl_dataset_is_snapshot(ds)) {
548 ASSERT(version >= SPA_VERSION_SNAP_PROPS);
549 if (dsl_dataset_phys(ds)->ds_props_obj == 0) {
550 dmu_buf_will_dirty(ds->ds_dbuf, tx);
551 dsl_dataset_phys(ds)->ds_props_obj =
553 DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
555 zapobj = dsl_dataset_phys(ds)->ds_props_obj;
557 zapobj = dsl_dir_phys(ds->ds_dir)->dd_props_zapobj;
560 if (version < SPA_VERSION_RECVD_PROPS) {
561 if (source & ZPROP_SRC_NONE)
562 source = ZPROP_SRC_NONE;
563 else if (source & ZPROP_SRC_RECEIVED)
564 source = ZPROP_SRC_LOCAL;
567 inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
568 recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
573 * revert to received value, if any (inherit -S)
575 * - remove propname$inherit
577 err = zap_remove(mos, zapobj, propname, tx);
578 ASSERT(err == 0 || err == ENOENT);
579 err = zap_remove(mos, zapobj, inheritstr, tx);
580 ASSERT(err == 0 || err == ENOENT);
582 case ZPROP_SRC_LOCAL:
584 * remove propname$inherit
585 * set propname -> value
587 err = zap_remove(mos, zapobj, inheritstr, tx);
588 ASSERT(err == 0 || err == ENOENT);
589 VERIFY0(zap_update(mos, zapobj, propname,
590 intsz, numints, value, tx));
592 case ZPROP_SRC_INHERITED:
596 * - set propname$inherit
598 err = zap_remove(mos, zapobj, propname, tx);
599 ASSERT(err == 0 || err == ENOENT);
600 if (version >= SPA_VERSION_RECVD_PROPS &&
601 dsl_prop_get_int_ds(ds, ZPROP_HAS_RECVD, &dummy) == 0) {
603 VERIFY0(zap_update(mos, zapobj, inheritstr,
607 case ZPROP_SRC_RECEIVED:
609 * set propname$recvd -> value
611 err = zap_update(mos, zapobj, recvdstr,
612 intsz, numints, value, tx);
615 case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
617 * clear local and received settings
619 * - remove propname$inherit
620 * - remove propname$recvd
622 err = zap_remove(mos, zapobj, propname, tx);
623 ASSERT(err == 0 || err == ENOENT);
624 err = zap_remove(mos, zapobj, inheritstr, tx);
625 ASSERT(err == 0 || err == ENOENT);
627 case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
629 * remove propname$recvd
631 err = zap_remove(mos, zapobj, recvdstr, tx);
632 ASSERT(err == 0 || err == ENOENT);
635 cmn_err(CE_PANIC, "unexpected property source: %d", source);
642 VERIFY0(dsl_prop_get_int_ds(ds, propname, &intval));
644 if (dsl_dataset_is_snapshot(ds)) {
645 dsl_prop_cb_record_t *cbr;
647 * It's a snapshot; nothing can inherit this
648 * property, so just look for callbacks on this
651 mutex_enter(&ds->ds_dir->dd_lock);
652 for (cbr = list_head(&ds->ds_dir->dd_prop_cbs); cbr;
653 cbr = list_next(&ds->ds_dir->dd_prop_cbs, cbr)) {
654 if (cbr->cbr_ds == ds &&
655 strcmp(cbr->cbr_propname, propname) == 0)
656 cbr->cbr_func(cbr->cbr_arg, intval);
658 mutex_exit(&ds->ds_dir->dd_lock);
660 dsl_prop_changed_notify(ds->ds_dir->dd_pool,
661 ds->ds_dir->dd_object, propname, intval, TRUE);
664 (void) snprintf(valbuf, sizeof (valbuf),
665 "%lld", (longlong_t)intval);
668 if (source == ZPROP_SRC_LOCAL) {
671 tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
672 if (dsl_prop_get_ds(ds, propname, 1,
673 ZAP_MAXVALUELEN, tbuf, NULL) == 0)
678 spa_history_log_internal_ds(ds, (source == ZPROP_SRC_NONE ||
679 source == ZPROP_SRC_INHERITED) ? "inherit" : "set", tx,
680 "%s=%s", propname, (valstr == NULL ? "" : valstr));
683 kmem_free(tbuf, ZAP_MAXVALUELEN);
687 dsl_prop_set_int(const char *dsname, const char *propname,
688 zprop_source_t source, uint64_t value)
690 nvlist_t *nvl = fnvlist_alloc();
693 fnvlist_add_uint64(nvl, propname, value);
694 error = dsl_props_set(dsname, source, nvl);
700 dsl_prop_set_string(const char *dsname, const char *propname,
701 zprop_source_t source, const char *value)
703 nvlist_t *nvl = fnvlist_alloc();
706 fnvlist_add_string(nvl, propname, value);
707 error = dsl_props_set(dsname, source, nvl);
713 dsl_prop_inherit(const char *dsname, const char *propname,
714 zprop_source_t source)
716 nvlist_t *nvl = fnvlist_alloc();
719 fnvlist_add_boolean(nvl, propname);
720 error = dsl_props_set(dsname, source, nvl);
725 typedef struct dsl_props_set_arg {
726 const char *dpsa_dsname;
727 zprop_source_t dpsa_source;
728 nvlist_t *dpsa_props;
729 } dsl_props_set_arg_t;
732 dsl_props_set_check(void *arg, dmu_tx_t *tx)
734 dsl_props_set_arg_t *dpsa = arg;
735 dsl_pool_t *dp = dmu_tx_pool(tx);
738 nvpair_t *elem = NULL;
741 err = dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds);
745 version = spa_version(ds->ds_dir->dd_pool->dp_spa);
746 while ((elem = nvlist_next_nvpair(dpsa->dpsa_props, elem)) != NULL) {
747 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
748 dsl_dataset_rele(ds, FTAG);
749 return (SET_ERROR(ENAMETOOLONG));
751 if (nvpair_type(elem) == DATA_TYPE_STRING) {
752 char *valstr = fnvpair_value_string(elem);
753 if (strlen(valstr) >= (version <
754 SPA_VERSION_STMF_PROP ?
755 ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
756 dsl_dataset_rele(ds, FTAG);
762 if (dsl_dataset_is_snapshot(ds) && version < SPA_VERSION_SNAP_PROPS) {
763 dsl_dataset_rele(ds, FTAG);
764 return (SET_ERROR(ENOTSUP));
766 dsl_dataset_rele(ds, FTAG);
771 dsl_props_set_sync_impl(dsl_dataset_t *ds, zprop_source_t source,
772 nvlist_t *props, dmu_tx_t *tx)
774 nvpair_t *elem = NULL;
776 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
777 nvpair_t *pair = elem;
779 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
781 * dsl_prop_get_all_impl() returns properties in this
784 nvlist_t *attrs = fnvpair_value_nvlist(pair);
785 pair = fnvlist_lookup_nvpair(attrs, ZPROP_VALUE);
788 if (nvpair_type(pair) == DATA_TYPE_STRING) {
789 const char *value = fnvpair_value_string(pair);
790 dsl_prop_set_sync_impl(ds, nvpair_name(pair),
791 source, 1, strlen(value) + 1, value, tx);
792 } else if (nvpair_type(pair) == DATA_TYPE_UINT64) {
793 uint64_t intval = fnvpair_value_uint64(pair);
794 dsl_prop_set_sync_impl(ds, nvpair_name(pair),
795 source, sizeof (intval), 1, &intval, tx);
796 } else if (nvpair_type(pair) == DATA_TYPE_BOOLEAN) {
797 dsl_prop_set_sync_impl(ds, nvpair_name(pair),
798 source, 0, 0, NULL, tx);
800 panic("invalid nvpair type");
806 dsl_props_set_sync(void *arg, dmu_tx_t *tx)
808 dsl_props_set_arg_t *dpsa = arg;
809 dsl_pool_t *dp = dmu_tx_pool(tx);
812 VERIFY0(dsl_dataset_hold(dp, dpsa->dpsa_dsname, FTAG, &ds));
813 dsl_props_set_sync_impl(ds, dpsa->dpsa_source, dpsa->dpsa_props, tx);
814 dsl_dataset_rele(ds, FTAG);
818 * All-or-nothing; if any prop can't be set, nothing will be modified.
821 dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
823 dsl_props_set_arg_t dpsa;
826 dpsa.dpsa_dsname = dsname;
827 dpsa.dpsa_source = source;
828 dpsa.dpsa_props = props;
831 * If the source includes NONE, then we will only be removing entries
832 * from the ZAP object. In that case don't check for ENOSPC.
834 if ((source & ZPROP_SRC_NONE) == 0)
835 nblks = 2 * fnvlist_num_pairs(props);
837 return (dsl_sync_task(dsname, dsl_props_set_check, dsl_props_set_sync,
838 &dpsa, nblks, ZFS_SPACE_CHECK_RESERVED));
841 typedef enum dsl_prop_getflags {
842 DSL_PROP_GET_INHERITING = 0x1, /* searching parent of target ds */
843 DSL_PROP_GET_SNAPSHOT = 0x2, /* snapshot dataset */
844 DSL_PROP_GET_LOCAL = 0x4, /* local properties */
845 DSL_PROP_GET_RECEIVED = 0x8 /* received properties */
846 } dsl_prop_getflags_t;
849 dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
850 const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
856 for (zap_cursor_init(&zc, mos, propobj);
857 (err = zap_cursor_retrieve(&zc, &za)) == 0;
858 zap_cursor_advance(&zc)) {
861 char buf[ZAP_MAXNAMELEN];
864 const char *propname;
867 suffix = strchr(za.za_name, '$');
869 if (suffix == NULL) {
871 * Skip local properties if we only want received
874 if (flags & DSL_PROP_GET_RECEIVED)
877 propname = za.za_name;
879 } else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
880 /* Skip explicitly inherited entries. */
882 } else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
883 if (flags & DSL_PROP_GET_LOCAL)
886 (void) strncpy(buf, za.za_name, (suffix - za.za_name));
887 buf[suffix - za.za_name] = '\0';
890 if (!(flags & DSL_PROP_GET_RECEIVED)) {
891 /* Skip if locally overridden. */
892 err = zap_contains(mos, propobj, propname);
898 /* Skip if explicitly inherited. */
899 valstr = kmem_asprintf("%s%s", propname,
900 ZPROP_INHERIT_SUFFIX);
901 err = zap_contains(mos, propobj, valstr);
909 source = ((flags & DSL_PROP_GET_INHERITING) ?
910 setpoint : ZPROP_SOURCE_VAL_RECVD);
913 * For backward compatibility, skip suffixes we don't
919 prop = zfs_name_to_prop(propname);
921 /* Skip non-inheritable properties. */
922 if ((flags & DSL_PROP_GET_INHERITING) && prop != ZPROP_INVAL &&
923 !zfs_prop_inheritable(prop))
926 /* Skip properties not valid for this type. */
927 if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_INVAL &&
928 !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT))
931 /* Skip properties already defined. */
932 if (nvlist_exists(nv, propname))
935 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
936 if (za.za_integer_length == 1) {
940 char *tmp = kmem_alloc(za.za_num_integers,
942 err = zap_lookup(mos, propobj,
943 za.za_name, 1, za.za_num_integers, tmp);
945 kmem_free(tmp, za.za_num_integers);
948 VERIFY(nvlist_add_string(propval, ZPROP_VALUE,
950 kmem_free(tmp, za.za_num_integers);
955 ASSERT(za.za_integer_length == 8);
956 (void) nvlist_add_uint64(propval, ZPROP_VALUE,
957 za.za_first_integer);
960 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, source) == 0);
961 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
962 nvlist_free(propval);
964 zap_cursor_fini(&zc);
971 * Iterate over all properties for this dataset and return them in an nvlist.
974 dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
975 dsl_prop_getflags_t flags)
977 dsl_dir_t *dd = ds->ds_dir;
978 dsl_pool_t *dp = dd->dd_pool;
979 objset_t *mos = dp->dp_meta_objset;
981 char setpoint[MAXNAMELEN];
983 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
985 if (dsl_dataset_is_snapshot(ds))
986 flags |= DSL_PROP_GET_SNAPSHOT;
988 ASSERT(dsl_pool_config_held(dp));
990 if (dsl_dataset_phys(ds)->ds_props_obj != 0) {
991 ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
992 dsl_dataset_name(ds, setpoint);
993 err = dsl_prop_get_all_impl(mos,
994 dsl_dataset_phys(ds)->ds_props_obj, setpoint, flags, *nvp);
999 for (; dd != NULL; dd = dd->dd_parent) {
1000 if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
1001 if (flags & (DSL_PROP_GET_LOCAL |
1002 DSL_PROP_GET_RECEIVED))
1004 flags |= DSL_PROP_GET_INHERITING;
1006 dsl_dir_name(dd, setpoint);
1007 err = dsl_prop_get_all_impl(mos,
1008 dsl_dir_phys(dd)->dd_props_zapobj, setpoint, flags, *nvp);
1017 dsl_prop_get_hasrecvd(const char *dsname)
1022 dsl_prop_get_integer(dsname, ZPROP_HAS_RECVD, &dummy, NULL));
1026 dsl_prop_set_hasrecvd_impl(const char *dsname, zprop_source_t source)
1032 VERIFY0(spa_open(dsname, &spa, FTAG));
1033 version = spa_version(spa);
1034 spa_close(spa, FTAG);
1036 if (version >= SPA_VERSION_RECVD_PROPS)
1037 error = dsl_prop_set_int(dsname, ZPROP_HAS_RECVD, source, 0);
1042 * Call after successfully receiving properties to ensure that only the first
1043 * receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
1046 dsl_prop_set_hasrecvd(const char *dsname)
1049 if (!dsl_prop_get_hasrecvd(dsname))
1050 error = dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_LOCAL);
1055 dsl_prop_unset_hasrecvd(const char *dsname)
1057 VERIFY0(dsl_prop_set_hasrecvd_impl(dsname, ZPROP_SRC_NONE));
1061 dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
1063 return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
1067 dsl_prop_get_received(const char *dsname, nvlist_t **nvp)
1073 * Received properties are not distinguishable from local properties
1074 * until the dataset has received properties on or after
1075 * SPA_VERSION_RECVD_PROPS.
1077 dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(dsname) ?
1078 DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
1080 error = dmu_objset_hold(dsname, FTAG, &os);
1083 error = dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags);
1084 dmu_objset_rele(os, FTAG);
1089 dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
1092 const char *propname = zfs_prop_to_name(prop);
1093 uint64_t default_value;
1095 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1096 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1100 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1101 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
1102 /* Indicate the default source if we can. */
1103 if (dodefault(propname, 8, 1, &default_value) == 0 &&
1104 value == default_value) {
1105 VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, "") == 0);
1107 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1108 nvlist_free(propval);
1112 dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
1115 const char *propname = zfs_prop_to_name(prop);
1117 if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
1118 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1122 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1123 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
1124 VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
1125 nvlist_free(propval);