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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/dmu.h>
#include <sys/dmu_objset.h>
#include <sys/dmu_tx.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_synctask.h>
#include <sys/spa.h>
#include <sys/zap.h>
#include <sys/fs/zfs.h>
#include "zfs_prop.h"
#define ZPROP_INHERIT_SUFFIX "$inherit"
#define ZPROP_RECVD_SUFFIX "$recvd"
static int
dodefault(const char *propname, int intsz, int numints, void *buf)
{
zfs_prop_t prop;
/*
* The setonce properties are read-only, BUT they still
* have a default value that can be used as the initial
* value.
*/
if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL ||
(zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
return (ENOENT);
if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
if (intsz != 1)
return (EOVERFLOW);
(void) strncpy(buf, zfs_prop_default_string(prop),
numints);
} else {
if (intsz != 8 || numints < 1)
return (EOVERFLOW);
*(uint64_t *)buf = zfs_prop_default_numeric(prop);
}
return (0);
}
int
dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
{
int err = ENOENT;
dsl_dir_t *target = dd;
objset_t *mos = dd->dd_pool->dp_meta_objset;
zfs_prop_t prop;
boolean_t inheritable;
boolean_t inheriting = B_FALSE;
char *inheritstr;
char *recvdstr;
ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock));
if (setpoint)
setpoint[0] = '\0';
prop = zfs_name_to_prop(propname);
inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
/*
* Note: dd may become NULL, therefore we shouldn't dereference it
* after this loop.
*/
for (; dd != NULL; dd = dd->dd_parent) {
ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock));
if (dd != target || snapshot) {
if (!inheritable)
break;
inheriting = B_TRUE;
}
/* Check for a local value. */
err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj, propname,
intsz, numints, buf);
if (err != ENOENT) {
if (setpoint != NULL && err == 0)
dsl_dir_name(dd, setpoint);
break;
}
/*
* Skip the check for a received value if there is an explicit
* inheritance entry.
*/
err = zap_contains(mos, dd->dd_phys->dd_props_zapobj,
inheritstr);
if (err != 0 && err != ENOENT)
break;
if (err == ENOENT) {
/* Check for a received value. */
err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj,
recvdstr, intsz, numints, buf);
if (err != ENOENT) {
if (setpoint != NULL && err == 0) {
if (inheriting) {
dsl_dir_name(dd, setpoint);
} else {
(void) strcpy(setpoint,
ZPROP_SOURCE_VAL_RECVD);
}
}
break;
}
}
/*
* If we found an explicit inheritance entry, err is zero even
* though we haven't yet found the value, so reinitializing err
* at the end of the loop (instead of at the beginning) ensures
* that err has a valid post-loop value.
*/
err = ENOENT;
}
if (err == ENOENT)
err = dodefault(propname, intsz, numints, buf);
strfree(inheritstr);
strfree(recvdstr);
return (err);
}
int
dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
int intsz, int numints, void *buf, char *setpoint)
{
zfs_prop_t prop = zfs_name_to_prop(propname);
boolean_t inheritable;
boolean_t snapshot;
uint64_t zapobj;
ASSERT(RW_LOCK_HELD(&ds->ds_dir->dd_pool->dp_config_rwlock));
inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
snapshot = (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds));
zapobj = (ds->ds_phys == NULL ? 0 : ds->ds_phys->ds_props_obj);
if (zapobj != 0) {
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
int err;
ASSERT(snapshot);
/* Check for a local value. */
err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
if (err != ENOENT) {
if (setpoint != NULL && err == 0)
dsl_dataset_name(ds, setpoint);
return (err);
}
/*
* Skip the check for a received value if there is an explicit
* inheritance entry.
*/
if (inheritable) {
char *inheritstr = kmem_asprintf("%s%s", propname,
ZPROP_INHERIT_SUFFIX);
err = zap_contains(mos, zapobj, inheritstr);
strfree(inheritstr);
if (err != 0 && err != ENOENT)
return (err);
}
if (err == ENOENT) {
/* Check for a received value. */
char *recvdstr = kmem_asprintf("%s%s", propname,
ZPROP_RECVD_SUFFIX);
err = zap_lookup(mos, zapobj, recvdstr,
intsz, numints, buf);
strfree(recvdstr);
if (err != ENOENT) {
if (setpoint != NULL && err == 0)
(void) strcpy(setpoint,
ZPROP_SOURCE_VAL_RECVD);
return (err);
}
}
}
return (dsl_prop_get_dd(ds->ds_dir, propname,
intsz, numints, buf, setpoint, snapshot));
}
/*
* Register interest in the named property. We'll call the callback
* once to notify it of the current property value, and again each time
* the property changes, until this callback is unregistered.
*
* Return 0 on success, errno if the prop is not an integer value.
*/
int
dsl_prop_register(dsl_dataset_t *ds, const char *propname,
dsl_prop_changed_cb_t *callback, void *cbarg)
{
dsl_dir_t *dd = ds->ds_dir;
dsl_pool_t *dp = dd->dd_pool;
uint64_t value;
dsl_prop_cb_record_t *cbr;
int err;
int need_rwlock;
need_rwlock = !RW_WRITE_HELD(&dp->dp_config_rwlock);
if (need_rwlock)
rw_enter(&dp->dp_config_rwlock, RW_READER);
err = dsl_prop_get_ds(ds, propname, 8, 1, &value, NULL);
if (err != 0) {
if (need_rwlock)
rw_exit(&dp->dp_config_rwlock);
return (err);
}
cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
cbr->cbr_ds = ds;
cbr->cbr_propname = kmem_alloc(strlen(propname)+1, KM_SLEEP);
(void) strcpy((char *)cbr->cbr_propname, propname);
cbr->cbr_func = callback;
cbr->cbr_arg = cbarg;
mutex_enter(&dd->dd_lock);
list_insert_head(&dd->dd_prop_cbs, cbr);
mutex_exit(&dd->dd_lock);
cbr->cbr_func(cbr->cbr_arg, value);
if (need_rwlock)
rw_exit(&dp->dp_config_rwlock);
return (0);
}
int
dsl_prop_get(const char *dsname, const char *propname,
int intsz, int numints, void *buf, char *setpoint)
{
dsl_dataset_t *ds;
int err;
err = dsl_dataset_hold(dsname, FTAG, &ds);
if (err)
return (err);
rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
err = dsl_prop_get_ds(ds, propname, intsz, numints, buf, setpoint);
rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
dsl_dataset_rele(ds, FTAG);
return (err);
}
/*
* Get the current property value. It may have changed by the time this
* function returns, so it is NOT safe to follow up with
* dsl_prop_register() and assume that the value has not changed in
* between.
*
* Return 0 on success, ENOENT if ddname is invalid.
*/
int
dsl_prop_get_integer(const char *ddname, const char *propname,
uint64_t *valuep, char *setpoint)
{
return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
}
void
dsl_prop_setarg_init_uint64(dsl_prop_setarg_t *psa, const char *propname,
zprop_source_t source, uint64_t *value)
{
psa->psa_name = propname;
psa->psa_source = source;
psa->psa_intsz = 8;
psa->psa_numints = 1;
psa->psa_value = value;
psa->psa_effective_value = -1ULL;
}
/*
* Predict the effective value of the given special property if it were set with
* the given value and source. This is not a general purpose function. It exists
* only to handle the special requirements of the quota and reservation
* properties. The fact that these properties are non-inheritable greatly
* simplifies the prediction logic.
*
* Returns 0 on success, a positive error code on failure, or -1 if called with
* a property not handled by this function.
*/
int
dsl_prop_predict_sync(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
{
const char *propname = psa->psa_name;
zfs_prop_t prop = zfs_name_to_prop(propname);
zprop_source_t source = psa->psa_source;
objset_t *mos;
uint64_t zapobj;
uint64_t version;
char *recvdstr;
int err = 0;
switch (prop) {
case ZFS_PROP_QUOTA:
case ZFS_PROP_RESERVATION:
case ZFS_PROP_REFQUOTA:
case ZFS_PROP_REFRESERVATION:
break;
default:
return (-1);
}
mos = dd->dd_pool->dp_meta_objset;
zapobj = dd->dd_phys->dd_props_zapobj;
recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
version = spa_version(dd->dd_pool->dp_spa);
if (version < SPA_VERSION_RECVD_PROPS) {
if (source & ZPROP_SRC_NONE)
source = ZPROP_SRC_NONE;
else if (source & ZPROP_SRC_RECEIVED)
source = ZPROP_SRC_LOCAL;
}
switch (source) {
case ZPROP_SRC_NONE:
/* Revert to the received value, if any. */
err = zap_lookup(mos, zapobj, recvdstr, 8, 1,
&psa->psa_effective_value);
if (err == ENOENT)
psa->psa_effective_value = 0;
break;
case ZPROP_SRC_LOCAL:
psa->psa_effective_value = *(uint64_t *)psa->psa_value;
break;
case ZPROP_SRC_RECEIVED:
/*
* If there's no local setting, then the new received value will
* be the effective value.
*/
err = zap_lookup(mos, zapobj, propname, 8, 1,
&psa->psa_effective_value);
if (err == ENOENT)
psa->psa_effective_value = *(uint64_t *)psa->psa_value;
break;
case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
/*
* We're clearing the received value, so the local setting (if
* it exists) remains the effective value.
*/
err = zap_lookup(mos, zapobj, propname, 8, 1,
&psa->psa_effective_value);
if (err == ENOENT)
psa->psa_effective_value = 0;
break;
default:
cmn_err(CE_PANIC, "unexpected property source: %d", source);
}
strfree(recvdstr);
if (err == ENOENT)
return (0);
return (err);
}
#ifdef ZFS_DEBUG
void
dsl_prop_check_prediction(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
{
zfs_prop_t prop = zfs_name_to_prop(psa->psa_name);
uint64_t intval;
char setpoint[MAXNAMELEN];
uint64_t version = spa_version(dd->dd_pool->dp_spa);
int err;
if (version < SPA_VERSION_RECVD_PROPS) {
switch (prop) {
case ZFS_PROP_QUOTA:
case ZFS_PROP_RESERVATION:
return;
}
}
err = dsl_prop_get_dd(dd, psa->psa_name, 8, 1, &intval,
setpoint, B_FALSE);
if (err == 0 && intval != psa->psa_effective_value) {
cmn_err(CE_PANIC, "%s property, source: %x, "
"predicted effective value: %llu, "
"actual effective value: %llu (setpoint: %s)",
psa->psa_name, psa->psa_source,
(unsigned long long)psa->psa_effective_value,
(unsigned long long)intval, setpoint);
}
}
#endif
/*
* Unregister this callback. Return 0 on success, ENOENT if ddname is
* invalid, ENOMSG if no matching callback registered.
*/
int
dsl_prop_unregister(dsl_dataset_t *ds, const char *propname,
dsl_prop_changed_cb_t *callback, void *cbarg)
{
dsl_dir_t *dd = ds->ds_dir;
dsl_prop_cb_record_t *cbr;
mutex_enter(&dd->dd_lock);
for (cbr = list_head(&dd->dd_prop_cbs);
cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
if (cbr->cbr_ds == ds &&
cbr->cbr_func == callback &&
cbr->cbr_arg == cbarg &&
strcmp(cbr->cbr_propname, propname) == 0)
break;
}
if (cbr == NULL) {
mutex_exit(&dd->dd_lock);
return (ENOMSG);
}
list_remove(&dd->dd_prop_cbs, cbr);
mutex_exit(&dd->dd_lock);
kmem_free((void*)cbr->cbr_propname, strlen(cbr->cbr_propname)+1);
kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
return (0);
}
/*
* Return the number of callbacks that are registered for this dataset.
*/
int
dsl_prop_numcb(dsl_dataset_t *ds)
{
dsl_dir_t *dd = ds->ds_dir;
dsl_prop_cb_record_t *cbr;
int num = 0;
mutex_enter(&dd->dd_lock);
for (cbr = list_head(&dd->dd_prop_cbs);
cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
if (cbr->cbr_ds == ds)
num++;
}
mutex_exit(&dd->dd_lock);
return (num);
}
static void
dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
const char *propname, uint64_t value, int first)
{
dsl_dir_t *dd;
dsl_prop_cb_record_t *cbr;
objset_t *mos = dp->dp_meta_objset;
zap_cursor_t zc;
zap_attribute_t *za;
int err;
ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock));
err = dsl_dir_open_obj(dp, ddobj, NULL, FTAG, &dd);
if (err)
return;
if (!first) {
/*
* If the prop is set here, then this change is not
* being inherited here or below; stop the recursion.
*/
err = zap_contains(mos, dd->dd_phys->dd_props_zapobj, propname);
if (err == 0) {
dsl_dir_close(dd, FTAG);
return;
}
ASSERT3U(err, ==, ENOENT);
}
mutex_enter(&dd->dd_lock);
for (cbr = list_head(&dd->dd_prop_cbs); cbr;
cbr = list_next(&dd->dd_prop_cbs, cbr)) {
uint64_t propobj = cbr->cbr_ds->ds_phys->ds_props_obj;
if (strcmp(cbr->cbr_propname, propname) != 0)
continue;
/*
* If the property is set on this ds, then it is not
* inherited here; don't call the callback.
*/
if (propobj && 0 == zap_contains(mos, propobj, propname))
continue;
cbr->cbr_func(cbr->cbr_arg, value);
}
mutex_exit(&dd->dd_lock);
za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
for (zap_cursor_init(&zc, mos,
dd->dd_phys->dd_child_dir_zapobj);
zap_cursor_retrieve(&zc, za) == 0;
zap_cursor_advance(&zc)) {
dsl_prop_changed_notify(dp, za->za_first_integer,
propname, value, FALSE);
}
kmem_free(za, sizeof (zap_attribute_t));
zap_cursor_fini(&zc);
dsl_dir_close(dd, FTAG);
}
void
dsl_prop_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
{
dsl_dataset_t *ds = arg1;
dsl_prop_setarg_t *psa = arg2;
objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
uint64_t zapobj, intval, dummy;
int isint;
char valbuf[32];
char *valstr = NULL;
char *inheritstr;
char *recvdstr;
char *tbuf = NULL;
int err;
uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
const char *propname = psa->psa_name;
zprop_source_t source = psa->psa_source;
isint = (dodefault(propname, 8, 1, &intval) == 0);
if (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds)) {
ASSERT(version >= SPA_VERSION_SNAP_PROPS);
if (ds->ds_phys->ds_props_obj == 0) {
dmu_buf_will_dirty(ds->ds_dbuf, tx);
ds->ds_phys->ds_props_obj =
zap_create(mos,
DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
}
zapobj = ds->ds_phys->ds_props_obj;
} else {
zapobj = ds->ds_dir->dd_phys->dd_props_zapobj;
}
if (version < SPA_VERSION_RECVD_PROPS) {
zfs_prop_t prop = zfs_name_to_prop(propname);
if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION)
return;
if (source & ZPROP_SRC_NONE)
source = ZPROP_SRC_NONE;
else if (source & ZPROP_SRC_RECEIVED)
source = ZPROP_SRC_LOCAL;
}
inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
switch (source) {
case ZPROP_SRC_NONE:
/*
* revert to received value, if any (inherit -S)
* - remove propname
* - remove propname$inherit
*/
err = zap_remove(mos, zapobj, propname, tx);
ASSERT(err == 0 || err == ENOENT);
err = zap_remove(mos, zapobj, inheritstr, tx);
ASSERT(err == 0 || err == ENOENT);
break;
case ZPROP_SRC_LOCAL:
/*
* remove propname$inherit
* set propname -> value
*/
err = zap_remove(mos, zapobj, inheritstr, tx);
ASSERT(err == 0 || err == ENOENT);
VERIFY(0 == zap_update(mos, zapobj, propname,
psa->psa_intsz, psa->psa_numints, psa->psa_value, tx));
break;
case ZPROP_SRC_INHERITED:
/*
* explicitly inherit
* - remove propname
* - set propname$inherit
*/
err = zap_remove(mos, zapobj, propname, tx);
ASSERT(err == 0 || err == ENOENT);
if (version >= SPA_VERSION_RECVD_PROPS &&
dsl_prop_get_ds(ds, ZPROP_HAS_RECVD, 8, 1, &dummy,
NULL) == 0) {
dummy = 0;
err = zap_update(mos, zapobj, inheritstr,
8, 1, &dummy, tx);
ASSERT(err == 0);
}
break;
case ZPROP_SRC_RECEIVED:
/*
* set propname$recvd -> value
*/
err = zap_update(mos, zapobj, recvdstr,
psa->psa_intsz, psa->psa_numints, psa->psa_value, tx);
ASSERT(err == 0);
break;
case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
/*
* clear local and received settings
* - remove propname
* - remove propname$inherit
* - remove propname$recvd
*/
err = zap_remove(mos, zapobj, propname, tx);
ASSERT(err == 0 || err == ENOENT);
err = zap_remove(mos, zapobj, inheritstr, tx);
ASSERT(err == 0 || err == ENOENT);
/* FALLTHRU */
case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
/*
* remove propname$recvd
*/
err = zap_remove(mos, zapobj, recvdstr, tx);
ASSERT(err == 0 || err == ENOENT);
break;
default:
cmn_err(CE_PANIC, "unexpected property source: %d", source);
}
strfree(inheritstr);
strfree(recvdstr);
if (isint) {
VERIFY(0 == dsl_prop_get_ds(ds, propname, 8, 1, &intval, NULL));
if (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds)) {
dsl_prop_cb_record_t *cbr;
/*
* It's a snapshot; nothing can inherit this
* property, so just look for callbacks on this
* ds here.
*/
mutex_enter(&ds->ds_dir->dd_lock);
for (cbr = list_head(&ds->ds_dir->dd_prop_cbs); cbr;
cbr = list_next(&ds->ds_dir->dd_prop_cbs, cbr)) {
if (cbr->cbr_ds == ds &&
strcmp(cbr->cbr_propname, propname) == 0)
cbr->cbr_func(cbr->cbr_arg, intval);
}
mutex_exit(&ds->ds_dir->dd_lock);
} else {
dsl_prop_changed_notify(ds->ds_dir->dd_pool,
ds->ds_dir->dd_object, propname, intval, TRUE);
}
(void) snprintf(valbuf, sizeof (valbuf),
"%lld", (longlong_t)intval);
valstr = valbuf;
} else {
if (source == ZPROP_SRC_LOCAL) {
valstr = (char *)psa->psa_value;
} else {
tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
if (dsl_prop_get_ds(ds, propname, 1,
ZAP_MAXVALUELEN, tbuf, NULL) == 0)
valstr = tbuf;
}
}
spa_history_log_internal((source == ZPROP_SRC_NONE ||
source == ZPROP_SRC_INHERITED) ? LOG_DS_INHERIT :
LOG_DS_PROPSET, ds->ds_dir->dd_pool->dp_spa, tx,
"%s=%s dataset = %llu", propname,
(valstr == NULL ? "" : valstr), ds->ds_object);
if (tbuf != NULL)
kmem_free(tbuf, ZAP_MAXVALUELEN);
}
void
dsl_props_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
{
dsl_dataset_t *ds = arg1;
dsl_props_arg_t *pa = arg2;
nvlist_t *props = pa->pa_props;
dsl_prop_setarg_t psa;
nvpair_t *elem = NULL;
psa.psa_source = pa->pa_source;
while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
nvpair_t *pair = elem;
psa.psa_name = nvpair_name(pair);
if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
/*
* dsl_prop_get_all_impl() returns properties in this
* format.
*/
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&pair) == 0);
}
if (nvpair_type(pair) == DATA_TYPE_STRING) {
VERIFY(nvpair_value_string(pair,
(char **)&psa.psa_value) == 0);
psa.psa_intsz = 1;
psa.psa_numints = strlen(psa.psa_value) + 1;
} else {
uint64_t intval;
VERIFY(nvpair_value_uint64(pair, &intval) == 0);
psa.psa_intsz = sizeof (intval);
psa.psa_numints = 1;
psa.psa_value = &intval;
}
dsl_prop_set_sync(ds, &psa, tx);
}
}
void
dsl_dir_prop_set_uint64_sync(dsl_dir_t *dd, const char *name, uint64_t val,
dmu_tx_t *tx)
{
objset_t *mos = dd->dd_pool->dp_meta_objset;
uint64_t zapobj = dd->dd_phys->dd_props_zapobj;
ASSERT(dmu_tx_is_syncing(tx));
VERIFY(0 == zap_update(mos, zapobj, name, sizeof (val), 1, &val, tx));
dsl_prop_changed_notify(dd->dd_pool, dd->dd_object, name, val, TRUE);
spa_history_log_internal(LOG_DS_PROPSET, dd->dd_pool->dp_spa, tx,
"%s=%llu dataset = %llu", name, (u_longlong_t)val,
dd->dd_phys->dd_head_dataset_obj);
}
int
dsl_prop_set(const char *dsname, const char *propname, zprop_source_t source,
int intsz, int numints, const void *buf)
{
dsl_dataset_t *ds;
uint64_t version;
int err;
dsl_prop_setarg_t psa;
/*
* We must do these checks before we get to the syncfunc, since
* it can't fail.
*/
if (strlen(propname) >= ZAP_MAXNAMELEN)
return (ENAMETOOLONG);
err = dsl_dataset_hold(dsname, FTAG, &ds);
if (err)
return (err);
version = spa_version(ds->ds_dir->dd_pool->dp_spa);
if (intsz * numints >= (version < SPA_VERSION_STMF_PROP ?
ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
dsl_dataset_rele(ds, FTAG);
return (E2BIG);
}
if (dsl_dataset_is_snapshot(ds) &&
version < SPA_VERSION_SNAP_PROPS) {
dsl_dataset_rele(ds, FTAG);
return (ENOTSUP);
}
psa.psa_name = propname;
psa.psa_source = source;
psa.psa_intsz = intsz;
psa.psa_numints = numints;
psa.psa_value = buf;
psa.psa_effective_value = -1ULL;
err = dsl_sync_task_do(ds->ds_dir->dd_pool,
NULL, dsl_prop_set_sync, ds, &psa, 2);
dsl_dataset_rele(ds, FTAG);
return (err);
}
int
dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
{
dsl_dataset_t *ds;
uint64_t version;
nvpair_t *elem = NULL;
dsl_props_arg_t pa;
int err;
if (err = dsl_dataset_hold(dsname, FTAG, &ds))
return (err);
/*
* Do these checks before the syncfunc, since it can't fail.
*/
version = spa_version(ds->ds_dir->dd_pool->dp_spa);
while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
dsl_dataset_rele(ds, FTAG);
return (ENAMETOOLONG);
}
if (nvpair_type(elem) == DATA_TYPE_STRING) {
char *valstr;
VERIFY(nvpair_value_string(elem, &valstr) == 0);
if (strlen(valstr) >= (version <
SPA_VERSION_STMF_PROP ?
ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
dsl_dataset_rele(ds, FTAG);
return (E2BIG);
}
}
}
if (dsl_dataset_is_snapshot(ds) &&
version < SPA_VERSION_SNAP_PROPS) {
dsl_dataset_rele(ds, FTAG);
return (ENOTSUP);
}
pa.pa_props = props;
pa.pa_source = source;
err = dsl_sync_task_do(ds->ds_dir->dd_pool,
NULL, dsl_props_set_sync, ds, &pa, 2);
dsl_dataset_rele(ds, FTAG);
return (err);
}
typedef enum dsl_prop_getflags {
DSL_PROP_GET_INHERITING = 0x1, /* searching parent of target ds */
DSL_PROP_GET_SNAPSHOT = 0x2, /* snapshot dataset */
DSL_PROP_GET_LOCAL = 0x4, /* local properties */
DSL_PROP_GET_RECEIVED = 0x8 /* received properties */
} dsl_prop_getflags_t;
static int
dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
{
zap_cursor_t zc;
zap_attribute_t za;
int err = 0;
for (zap_cursor_init(&zc, mos, propobj);
(err = zap_cursor_retrieve(&zc, &za)) == 0;
zap_cursor_advance(&zc)) {
nvlist_t *propval;
zfs_prop_t prop;
char buf[ZAP_MAXNAMELEN];
char *valstr;
const char *suffix;
const char *propname;
const char *source;
suffix = strchr(za.za_name, '$');
if (suffix == NULL) {
/*
* Skip local properties if we only want received
* properties.
*/
if (flags & DSL_PROP_GET_RECEIVED)
continue;
propname = za.za_name;
source = setpoint;
} else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
/* Skip explicitly inherited entries. */
continue;
} else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
if (flags & DSL_PROP_GET_LOCAL)
continue;
(void) strncpy(buf, za.za_name, (suffix - za.za_name));
buf[suffix - za.za_name] = '\0';
propname = buf;
if (!(flags & DSL_PROP_GET_RECEIVED)) {
/* Skip if locally overridden. */
err = zap_contains(mos, propobj, propname);
if (err == 0)
continue;
if (err != ENOENT)
break;
/* Skip if explicitly inherited. */
valstr = kmem_asprintf("%s%s", propname,
ZPROP_INHERIT_SUFFIX);
err = zap_contains(mos, propobj, valstr);
strfree(valstr);
if (err == 0)
continue;
if (err != ENOENT)
break;
}
source = ((flags & DSL_PROP_GET_INHERITING) ?
setpoint : ZPROP_SOURCE_VAL_RECVD);
} else {
/*
* For backward compatibility, skip suffixes we don't
* recognize.
*/
continue;
}
prop = zfs_name_to_prop(propname);
/* Skip non-inheritable properties. */
if ((flags & DSL_PROP_GET_INHERITING) && prop != ZPROP_INVAL &&
!zfs_prop_inheritable(prop))
continue;
/* Skip properties not valid for this type. */
if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_INVAL &&
!zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT))
continue;
/* Skip properties already defined. */
if (nvlist_exists(nv, propname))
continue;
VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
if (za.za_integer_length == 1) {
/*
* String property
*/
char *tmp = kmem_alloc(za.za_num_integers,
KM_SLEEP);
err = zap_lookup(mos, propobj,
za.za_name, 1, za.za_num_integers, tmp);
if (err != 0) {
kmem_free(tmp, za.za_num_integers);
break;
}
VERIFY(nvlist_add_string(propval, ZPROP_VALUE,
tmp) == 0);
kmem_free(tmp, za.za_num_integers);
} else {
/*
* Integer property
*/
ASSERT(za.za_integer_length == 8);
(void) nvlist_add_uint64(propval, ZPROP_VALUE,
za.za_first_integer);
}
VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, source) == 0);
VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
nvlist_free(propval);
}
zap_cursor_fini(&zc);
if (err == ENOENT)
err = 0;
return (err);
}
/*
* Iterate over all properties for this dataset and return them in an nvlist.
*/
static int
dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
dsl_prop_getflags_t flags)
{
dsl_dir_t *dd = ds->ds_dir;
dsl_pool_t *dp = dd->dd_pool;
objset_t *mos = dp->dp_meta_objset;
int err = 0;
char setpoint[MAXNAMELEN];
VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
if (dsl_dataset_is_snapshot(ds))
flags |= DSL_PROP_GET_SNAPSHOT;
rw_enter(&dp->dp_config_rwlock, RW_READER);
if (ds->ds_phys->ds_props_obj != 0) {
ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
dsl_dataset_name(ds, setpoint);
err = dsl_prop_get_all_impl(mos, ds->ds_phys->ds_props_obj,
setpoint, flags, *nvp);
if (err)
goto out;
}
for (; dd != NULL; dd = dd->dd_parent) {
if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
if (flags & (DSL_PROP_GET_LOCAL |
DSL_PROP_GET_RECEIVED))
break;
flags |= DSL_PROP_GET_INHERITING;
}
dsl_dir_name(dd, setpoint);
err = dsl_prop_get_all_impl(mos, dd->dd_phys->dd_props_zapobj,
setpoint, flags, *nvp);
if (err)
break;
}
out:
rw_exit(&dp->dp_config_rwlock);
return (err);
}
boolean_t
dsl_prop_get_hasrecvd(objset_t *os)
{
dsl_dataset_t *ds = os->os_dsl_dataset;
int rc;
uint64_t dummy;
rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
rc = dsl_prop_get_ds(ds, ZPROP_HAS_RECVD, 8, 1, &dummy, NULL);
rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
ASSERT(rc != 0 || spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS);
return (rc == 0);
}
static void
dsl_prop_set_hasrecvd_impl(objset_t *os, zprop_source_t source)
{
dsl_dataset_t *ds = os->os_dsl_dataset;
uint64_t dummy = 0;
dsl_prop_setarg_t psa;
if (spa_version(os->os_spa) < SPA_VERSION_RECVD_PROPS)
return;
dsl_prop_setarg_init_uint64(&psa, ZPROP_HAS_RECVD, source, &dummy);
(void) dsl_sync_task_do(ds->ds_dir->dd_pool, NULL,
dsl_prop_set_sync, ds, &psa, 2);
}
/*
* Call after successfully receiving properties to ensure that only the first
* receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
*/
void
dsl_prop_set_hasrecvd(objset_t *os)
{
if (dsl_prop_get_hasrecvd(os)) {
ASSERT(spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS);
return;
}
dsl_prop_set_hasrecvd_impl(os, ZPROP_SRC_LOCAL);
}
void
dsl_prop_unset_hasrecvd(objset_t *os)
{
dsl_prop_set_hasrecvd_impl(os, ZPROP_SRC_NONE);
}
int
dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
{
return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
}
int
dsl_prop_get_received(objset_t *os, nvlist_t **nvp)
{
/*
* Received properties are not distinguishable from local properties
* until the dataset has received properties on or after
* SPA_VERSION_RECVD_PROPS.
*/
dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(os) ?
DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags));
}
void
dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
{
nvlist_t *propval;
const char *propname = zfs_prop_to_name(prop);
uint64_t default_value;
if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
return;
}
VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
/* Indicate the default source if we can. */
if (dodefault(propname, 8, 1, &default_value) == 0 &&
value == default_value) {
VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, "") == 0);
}
VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
nvlist_free(propval);
}
void
dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
{
nvlist_t *propval;
const char *propname = zfs_prop_to_name(prop);
if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
return;
}
VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
nvlist_free(propval);
}