vendor/opensolaris/20100818vendor/opensolaris

1 files changed, 5122 insertions, 0 deletions

diff --git a/uts/common/fs/zfs/zfs_ioctl.c b/uts/common/fs/zfs/zfs_ioctl.c
new file mode 100644
index 000000000000..1b63c9bf45ef
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_ioctl.c
@@ -0,0 +1,5122 @@
+/*
+ * 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/types.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/buf.h>
+#include <sys/modctl.h>
+#include <sys/open.h>
+#include <sys/file.h>
+#include <sys/kmem.h>
+#include <sys/conf.h>
+#include <sys/cmn_err.h>
+#include <sys/stat.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/zfs_znode.h>
+#include <sys/zap.h>
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/vdev.h>
+#include <sys/priv_impl.h>
+#include <sys/dmu.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_deleg.h>
+#include <sys/dmu_objset.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/sunldi.h>
+#include <sys/policy.h>
+#include <sys/zone.h>
+#include <sys/nvpair.h>
+#include <sys/pathname.h>
+#include <sys/mount.h>
+#include <sys/sdt.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_onexit.h>
+#include <sys/zvol.h>
+#include <sys/dsl_scan.h>
+#include <sharefs/share.h>
+#include <sys/dmu_objset.h>
+
+#include "zfs_namecheck.h"
+#include "zfs_prop.h"
+#include "zfs_deleg.h"
+#include "zfs_comutil.h"
+
+extern struct modlfs zfs_modlfs;
+
+extern void zfs_init(void);
+extern void zfs_fini(void);
+
+ldi_ident_t zfs_li = NULL;
+dev_info_t *zfs_dip;
+
+typedef int zfs_ioc_func_t(zfs_cmd_t *);
+typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *);
+
+typedef enum {
+	NO_NAME,
+	POOL_NAME,
+	DATASET_NAME
+} zfs_ioc_namecheck_t;
+
+typedef enum {
+	POOL_CHECK_NONE		= 1 << 0,
+	POOL_CHECK_SUSPENDED	= 1 << 1,
+	POOL_CHECK_READONLY	= 1 << 2
+} zfs_ioc_poolcheck_t;
+
+typedef struct zfs_ioc_vec {
+	zfs_ioc_func_t		*zvec_func;
+	zfs_secpolicy_func_t	*zvec_secpolicy;
+	zfs_ioc_namecheck_t	zvec_namecheck;
+	boolean_t		zvec_his_log;
+	zfs_ioc_poolcheck_t	zvec_pool_check;
+} zfs_ioc_vec_t;
+
+/* This array is indexed by zfs_userquota_prop_t */
+static const char *userquota_perms[] = {
+	ZFS_DELEG_PERM_USERUSED,
+	ZFS_DELEG_PERM_USERQUOTA,
+	ZFS_DELEG_PERM_GROUPUSED,
+	ZFS_DELEG_PERM_GROUPQUOTA,
+};
+
+static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
+static int zfs_check_settable(const char *name, nvpair_t *property,
+    cred_t *cr);
+static int zfs_check_clearable(char *dataset, nvlist_t *props,
+    nvlist_t **errors);
+static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
+    boolean_t *);
+int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t **);
+
+/* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
+void
+__dprintf(const char *file, const char *func, int line, const char *fmt, ...)
+{
+	const char *newfile;
+	char buf[512];
+	va_list adx;
+
+	/*
+	 * Get rid of annoying "../common/" prefix to filename.
+	 */
+	newfile = strrchr(file, '/');
+	if (newfile != NULL) {
+		newfile = newfile + 1; /* Get rid of leading / */
+	} else {
+		newfile = file;
+	}
+
+	va_start(adx, fmt);
+	(void) vsnprintf(buf, sizeof (buf), fmt, adx);
+	va_end(adx);
+
+	/*
+	 * To get this data, use the zfs-dprintf probe as so:
+	 * dtrace -q -n 'zfs-dprintf \
+	 *	/stringof(arg0) == "dbuf.c"/ \
+	 *	{printf("%s: %s", stringof(arg1), stringof(arg3))}'
+	 * arg0 = file name
+	 * arg1 = function name
+	 * arg2 = line number
+	 * arg3 = message
+	 */
+	DTRACE_PROBE4(zfs__dprintf,
+	    char *, newfile, char *, func, int, line, char *, buf);
+}
+
+static void
+history_str_free(char *buf)
+{
+	kmem_free(buf, HIS_MAX_RECORD_LEN);
+}
+
+static char *
+history_str_get(zfs_cmd_t *zc)
+{
+	char *buf;
+
+	if (zc->zc_history == NULL)
+		return (NULL);
+
+	buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
+	if (copyinstr((void *)(uintptr_t)zc->zc_history,
+	    buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
+		history_str_free(buf);
+		return (NULL);
+	}
+
+	buf[HIS_MAX_RECORD_LEN -1] = '\0';
+
+	return (buf);
+}
+
+/*
+ * Check to see if the named dataset is currently defined as bootable
+ */
+static boolean_t
+zfs_is_bootfs(const char *name)
+{
+	objset_t *os;
+
+	if (dmu_objset_hold(name, FTAG, &os) == 0) {
+		boolean_t ret;
+		ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
+		dmu_objset_rele(os, FTAG);
+		return (ret);
+	}
+	return (B_FALSE);
+}
+
+/*
+ * zfs_earlier_version
+ *
+ *	Return non-zero if the spa version is less than requested version.
+ */
+static int
+zfs_earlier_version(const char *name, int version)
+{
+	spa_t *spa;
+
+	if (spa_open(name, &spa, FTAG) == 0) {
+		if (spa_version(spa) < version) {
+			spa_close(spa, FTAG);
+			return (1);
+		}
+		spa_close(spa, FTAG);
+	}
+	return (0);
+}
+
+/*
+ * zpl_earlier_version
+ *
+ * Return TRUE if the ZPL version is less than requested version.
+ */
+static boolean_t
+zpl_earlier_version(const char *name, int version)
+{
+	objset_t *os;
+	boolean_t rc = B_TRUE;
+
+	if (dmu_objset_hold(name, FTAG, &os) == 0) {
+		uint64_t zplversion;
+
+		if (dmu_objset_type(os) != DMU_OST_ZFS) {
+			dmu_objset_rele(os, FTAG);
+			return (B_TRUE);
+		}
+		/* XXX reading from non-owned objset */
+		if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
+			rc = zplversion < version;
+		dmu_objset_rele(os, FTAG);
+	}
+	return (rc);
+}
+
+static void
+zfs_log_history(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *buf;
+
+	if ((buf = history_str_get(zc)) == NULL)
+		return;
+
+	if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
+		if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
+			(void) spa_history_log(spa, buf, LOG_CMD_NORMAL);
+		spa_close(spa, FTAG);
+	}
+	history_str_free(buf);
+}
+
+/*
+ * Policy for top-level read operations (list pools).  Requires no privileges,
+ * and can be used in the local zone, as there is no associated dataset.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (0);
+}
+
+/*
+ * Policy for dataset read operations (list children, get statistics).  Requires
+ * no privileges, but must be visible in the local zone.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (INGLOBALZONE(curproc) ||
+	    zone_dataset_visible(zc->zc_name, NULL))
+		return (0);
+
+	return (ENOENT);
+}
+
+static int
+zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
+{
+	int writable = 1;
+
+	/*
+	 * The dataset must be visible by this zone -- check this first
+	 * so they don't see EPERM on something they shouldn't know about.
+	 */
+	if (!INGLOBALZONE(curproc) &&
+	    !zone_dataset_visible(dataset, &writable))
+		return (ENOENT);
+
+	if (INGLOBALZONE(curproc)) {
+		/*
+		 * If the fs is zoned, only root can access it from the
+		 * global zone.
+		 */
+		if (secpolicy_zfs(cr) && zoned)
+			return (EPERM);
+	} else {
+		/*
+		 * If we are in a local zone, the 'zoned' property must be set.
+		 */
+		if (!zoned)
+			return (EPERM);
+
+		/* must be writable by this zone */
+		if (!writable)
+			return (EPERM);
+	}
+	return (0);
+}
+
+static int
+zfs_dozonecheck(const char *dataset, cred_t *cr)
+{
+	uint64_t zoned;
+
+	if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
+		return (ENOENT);
+
+	return (zfs_dozonecheck_impl(dataset, zoned, cr));
+}
+
+static int
+zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
+{
+	uint64_t zoned;
+
+	rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
+	if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) {
+		rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+		return (ENOENT);
+	}
+	rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+
+	return (zfs_dozonecheck_impl(dataset, zoned, cr));
+}
+
+int
+zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
+{
+	int error;
+
+	error = zfs_dozonecheck(name, cr);
+	if (error == 0) {
+		error = secpolicy_zfs(cr);
+		if (error)
+			error = dsl_deleg_access(name, perm, cr);
+	}
+	return (error);
+}
+
+int
+zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
+    const char *perm, cred_t *cr)
+{
+	int error;
+
+	error = zfs_dozonecheck_ds(name, ds, cr);
+	if (error == 0) {
+		error = secpolicy_zfs(cr);
+		if (error)
+			error = dsl_deleg_access_impl(ds, perm, cr);
+	}
+	return (error);
+}
+
+/*
+ * Policy for setting the security label property.
+ *
+ * Returns 0 for success, non-zero for access and other errors.
+ */
+static int
+zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
+{
+	char		ds_hexsl[MAXNAMELEN];
+	bslabel_t	ds_sl, new_sl;
+	boolean_t	new_default = FALSE;
+	uint64_t	zoned;
+	int		needed_priv = -1;
+	int		error;
+
+	/* First get the existing dataset label. */
+	error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
+	    1, sizeof (ds_hexsl), &ds_hexsl, NULL);
+	if (error)
+		return (EPERM);
+
+	if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
+		new_default = TRUE;
+
+	/* The label must be translatable */
+	if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
+		return (EINVAL);
+
+	/*
+	 * In a non-global zone, disallow attempts to set a label that
+	 * doesn't match that of the zone; otherwise no other checks
+	 * are needed.
+	 */
+	if (!INGLOBALZONE(curproc)) {
+		if (new_default || !blequal(&new_sl, CR_SL(CRED())))
+			return (EPERM);
+		return (0);
+	}
+
+	/*
+	 * For global-zone datasets (i.e., those whose zoned property is
+	 * "off", verify that the specified new label is valid for the
+	 * global zone.
+	 */
+	if (dsl_prop_get_integer(name,
+	    zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
+		return (EPERM);
+	if (!zoned) {
+		if (zfs_check_global_label(name, strval) != 0)
+			return (EPERM);
+	}
+
+	/*
+	 * If the existing dataset label is nondefault, check if the
+	 * dataset is mounted (label cannot be changed while mounted).
+	 * Get the zfsvfs; if there isn't one, then the dataset isn't
+	 * mounted (or isn't a dataset, doesn't exist, ...).
+	 */
+	if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
+		objset_t *os;
+		static char *setsl_tag = "setsl_tag";
+
+		/*
+		 * Try to own the dataset; abort if there is any error,
+		 * (e.g., already mounted, in use, or other error).
+		 */
+		error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
+		    setsl_tag, &os);
+		if (error)
+			return (EPERM);
+
+		dmu_objset_disown(os, setsl_tag);
+
+		if (new_default) {
+			needed_priv = PRIV_FILE_DOWNGRADE_SL;
+			goto out_check;
+		}
+
+		if (hexstr_to_label(strval, &new_sl) != 0)
+			return (EPERM);
+
+		if (blstrictdom(&ds_sl, &new_sl))
+			needed_priv = PRIV_FILE_DOWNGRADE_SL;
+		else if (blstrictdom(&new_sl, &ds_sl))
+			needed_priv = PRIV_FILE_UPGRADE_SL;
+	} else {
+		/* dataset currently has a default label */
+		if (!new_default)
+			needed_priv = PRIV_FILE_UPGRADE_SL;
+	}
+
+out_check:
+	if (needed_priv != -1)
+		return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
+	return (0);
+}
+
+static int
+zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
+    cred_t *cr)
+{
+	char *strval;
+
+	/*
+	 * Check permissions for special properties.
+	 */
+	switch (prop) {
+	case ZFS_PROP_ZONED:
+		/*
+		 * Disallow setting of 'zoned' from within a local zone.
+		 */
+		if (!INGLOBALZONE(curproc))
+			return (EPERM);
+		break;
+
+	case ZFS_PROP_QUOTA:
+		if (!INGLOBALZONE(curproc)) {
+			uint64_t zoned;
+			char setpoint[MAXNAMELEN];
+			/*
+			 * Unprivileged users are allowed to modify the
+			 * quota on things *under* (ie. contained by)
+			 * the thing they own.
+			 */
+			if (dsl_prop_get_integer(dsname, "zoned", &zoned,
+			    setpoint))
+				return (EPERM);
+			if (!zoned || strlen(dsname) <= strlen(setpoint))
+				return (EPERM);
+		}
+		break;
+
+	case ZFS_PROP_MLSLABEL:
+		if (!is_system_labeled())
+			return (EPERM);
+
+		if (nvpair_value_string(propval, &strval) == 0) {
+			int err;
+
+			err = zfs_set_slabel_policy(dsname, strval, CRED());
+			if (err != 0)
+				return (err);
+		}
+		break;
+	}
+
+	return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
+}
+
+int
+zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	error = zfs_dozonecheck(zc->zc_name, cr);
+	if (error)
+		return (error);
+
+	/*
+	 * permission to set permissions will be evaluated later in
+	 * dsl_deleg_can_allow()
+	 */
+	return (0);
+}
+
+int
+zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_ROLLBACK, cr));
+}
+
+int
+zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr)
+{
+	spa_t *spa;
+	dsl_pool_t *dp;
+	dsl_dataset_t *ds;
+	char *cp;
+	int error;
+
+	/*
+	 * Generate the current snapshot name from the given objsetid, then
+	 * use that name for the secpolicy/zone checks.
+	 */
+	cp = strchr(zc->zc_name, '@');
+	if (cp == NULL)
+		return (EINVAL);
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error)
+		return (error);
+
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
+	rw_exit(&dp->dp_config_rwlock);
+	spa_close(spa, FTAG);
+	if (error)
+		return (error);
+
+	dsl_dataset_name(ds, zc->zc_name);
+
+	error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
+	    ZFS_DELEG_PERM_SEND, cr);
+	dsl_dataset_rele(ds, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr)
+{
+	vnode_t *vp;
+	int error;
+
+	if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
+	    NO_FOLLOW, NULL, &vp)) != 0)
+		return (error);
+
+	/* Now make sure mntpnt and dataset are ZFS */
+
+	if (vp->v_vfsp->vfs_fstype != zfsfstype ||
+	    (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
+	    zc->zc_name) != 0)) {
+		VN_RELE(vp);
+		return (EPERM);
+	}
+
+	VN_RELE(vp);
+	return (dsl_deleg_access(zc->zc_name,
+	    ZFS_DELEG_PERM_SHARE, cr));
+}
+
+int
+zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (!INGLOBALZONE(curproc))
+		return (EPERM);
+
+	if (secpolicy_nfs(cr) == 0) {
+		return (0);
+	} else {
+		return (zfs_secpolicy_deleg_share(zc, cr));
+	}
+}
+
+int
+zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (!INGLOBALZONE(curproc))
+		return (EPERM);
+
+	if (secpolicy_smb(cr) == 0) {
+		return (0);
+	} else {
+		return (zfs_secpolicy_deleg_share(zc, cr));
+	}
+}
+
+static int
+zfs_get_parent(const char *datasetname, char *parent, int parentsize)
+{
+	char *cp;
+
+	/*
+	 * Remove the @bla or /bla from the end of the name to get the parent.
+	 */
+	(void) strncpy(parent, datasetname, parentsize);
+	cp = strrchr(parent, '@');
+	if (cp != NULL) {
+		cp[0] = '\0';
+	} else {
+		cp = strrchr(parent, '/');
+		if (cp == NULL)
+			return (ENOENT);
+		cp[0] = '\0';
+	}
+
+	return (0);
+}
+
+int
+zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
+{
+	int error;
+
+	if ((error = zfs_secpolicy_write_perms(name,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
+}
+
+static int
+zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
+}
+
+/*
+ * Destroying snapshots with delegated permissions requires
+ * descendent mount and destroy permissions.
+ * Reassemble the full filesystem@snap name so dsl_deleg_access()
+ * can do the correct permission check.
+ *
+ * Since this routine is used when doing a recursive destroy of snapshots
+ * and destroying snapshots requires descendent permissions, a successfull
+ * check of the top level snapshot applies to snapshots of all descendent
+ * datasets as well.
+ */
+static int
+zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+	char *dsname;
+
+	dsname = kmem_asprintf("%s@%s", zc->zc_name, zc->zc_value);
+
+	error = zfs_secpolicy_destroy_perms(dsname, cr);
+
+	strfree(dsname);
+	return (error);
+}
+
+int
+zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
+{
+	char	parentname[MAXNAMELEN];
+	int	error;
+
+	if ((error = zfs_secpolicy_write_perms(from,
+	    ZFS_DELEG_PERM_RENAME, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(from,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_get_parent(to, parentname,
+	    sizeof (parentname))) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_CREATE, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	return (error);
+}
+
+static int
+zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
+}
+
+static int
+zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr)
+{
+	char	parentname[MAXNAMELEN];
+	objset_t *clone;
+	int error;
+
+	error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_PROMOTE, cr);
+	if (error)
+		return (error);
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &clone);
+
+	if (error == 0) {
+		dsl_dataset_t *pclone = NULL;
+		dsl_dir_t *dd;
+		dd = clone->os_dsl_dataset->ds_dir;
+
+		rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dd->dd_pool,
+		    dd->dd_phys->dd_origin_obj, FTAG, &pclone);
+		rw_exit(&dd->dd_pool->dp_config_rwlock);
+		if (error) {
+			dmu_objset_rele(clone, FTAG);
+			return (error);
+		}
+
+		error = zfs_secpolicy_write_perms(zc->zc_name,
+		    ZFS_DELEG_PERM_MOUNT, cr);
+
+		dsl_dataset_name(pclone, parentname);
+		dmu_objset_rele(clone, FTAG);
+		dsl_dataset_rele(pclone, FTAG);
+		if (error == 0)
+			error = zfs_secpolicy_write_perms(parentname,
+			    ZFS_DELEG_PERM_PROMOTE, cr);
+	}
+	return (error);
+}
+
+static int
+zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	if ((error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_CREATE, cr));
+}
+
+int
+zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(name,
+	    ZFS_DELEG_PERM_SNAPSHOT, cr));
+}
+
+static int
+zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr)
+{
+
+	return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr));
+}
+
+static int
+zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr)
+{
+	char	parentname[MAXNAMELEN];
+	int	error;
+
+	if ((error = zfs_get_parent(zc->zc_name, parentname,
+	    sizeof (parentname))) != 0)
+		return (error);
+
+	if (zc->zc_value[0] != '\0') {
+		if ((error = zfs_secpolicy_write_perms(zc->zc_value,
+		    ZFS_DELEG_PERM_CLONE, cr)) != 0)
+			return (error);
+	}
+
+	if ((error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_CREATE, cr)) != 0)
+		return (error);
+
+	error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_MOUNT, cr);
+
+	return (error);
+}
+
+static int
+zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	error = secpolicy_fs_unmount(cr, NULL);
+	if (error) {
+		error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr);
+	}
+	return (error);
+}
+
+/*
+ * Policy for pool operations - create/destroy pools, add vdevs, etc.  Requires
+ * SYS_CONFIG privilege, which is not available in a local zone.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (secpolicy_sys_config(cr, B_FALSE) != 0)
+		return (EPERM);
+
+	return (0);
+}
+
+/*
+ * Policy for object to name lookups.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_diff(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
+		return (0);
+
+	error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
+	return (error);
+}
+
+/*
+ * Policy for fault injection.  Requires all privileges.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (secpolicy_zinject(cr));
+}
+
+static int
+zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr)
+{
+	zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
+
+	if (prop == ZPROP_INVAL) {
+		if (!zfs_prop_user(zc->zc_value))
+			return (EINVAL);
+		return (zfs_secpolicy_write_perms(zc->zc_name,
+		    ZFS_DELEG_PERM_USERPROP, cr));
+	} else {
+		return (zfs_secpolicy_setprop(zc->zc_name, prop,
+		    NULL, cr));
+	}
+}
+
+static int
+zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr)
+{
+	int err = zfs_secpolicy_read(zc, cr);
+	if (err)
+		return (err);
+
+	if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
+		return (EINVAL);
+
+	if (zc->zc_value[0] == 0) {
+		/*
+		 * They are asking about a posix uid/gid.  If it's
+		 * themself, allow it.
+		 */
+		if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
+		    zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
+			if (zc->zc_guid == crgetuid(cr))
+				return (0);
+		} else {
+			if (groupmember(zc->zc_guid, cr))
+				return (0);
+		}
+	}
+
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    userquota_perms[zc->zc_objset_type], cr));
+}
+
+static int
+zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr)
+{
+	int err = zfs_secpolicy_read(zc, cr);
+	if (err)
+		return (err);
+
+	if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
+		return (EINVAL);
+
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    userquota_perms[zc->zc_objset_type], cr));
+}
+
+static int
+zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
+	    NULL, cr));
+}
+
+static int
+zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_HOLD, cr));
+}
+
+static int
+zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_RELEASE, cr));
+}
+
+/*
+ * Policy for allowing temporary snapshots to be taken or released
+ */
+static int
+zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, cred_t *cr)
+{
+	/*
+	 * A temporary snapshot is the same as a snapshot,
+	 * hold, destroy and release all rolled into one.
+	 * Delegated diff alone is sufficient that we allow this.
+	 */
+	int error;
+
+	if ((error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_DIFF, cr)) == 0)
+		return (0);
+
+	error = zfs_secpolicy_snapshot(zc, cr);
+	if (!error)
+		error = zfs_secpolicy_hold(zc, cr);
+	if (!error)
+		error = zfs_secpolicy_release(zc, cr);
+	if (!error)
+		error = zfs_secpolicy_destroy(zc, cr);
+	return (error);
+}
+
+/*
+ * Returns the nvlist as specified by the user in the zfs_cmd_t.
+ */
+static int
+get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
+{
+	char *packed;
+	int error;
+	nvlist_t *list = NULL;
+
+	/*
+	 * Read in and unpack the user-supplied nvlist.
+	 */
+	if (size == 0)
+		return (EINVAL);
+
+	packed = kmem_alloc(size, KM_SLEEP);
+
+	if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
+	    iflag)) != 0) {
+		kmem_free(packed, size);
+		return (error);
+	}
+
+	if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
+		kmem_free(packed, size);
+		return (error);
+	}
+
+	kmem_free(packed, size);
+
+	*nvp = list;
+	return (0);
+}
+
+static int
+fit_error_list(zfs_cmd_t *zc, nvlist_t **errors)
+{
+	size_t size;
+
+	VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
+
+	if (size > zc->zc_nvlist_dst_size) {
+		nvpair_t *more_errors;
+		int n = 0;
+
+		if (zc->zc_nvlist_dst_size < 1024)
+			return (ENOMEM);
+
+		VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0);
+		more_errors = nvlist_prev_nvpair(*errors, NULL);
+
+		do {
+			nvpair_t *pair = nvlist_prev_nvpair(*errors,
+			    more_errors);
+			VERIFY(nvlist_remove_nvpair(*errors, pair) == 0);
+			n++;
+			VERIFY(nvlist_size(*errors, &size,
+			    NV_ENCODE_NATIVE) == 0);
+		} while (size > zc->zc_nvlist_dst_size);
+
+		VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0);
+		VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0);
+		ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
+		ASSERT(size <= zc->zc_nvlist_dst_size);
+	}
+
+	return (0);
+}
+
+static int
+put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
+{
+	char *packed = NULL;
+	int error = 0;
+	size_t size;
+
+	VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0);
+
+	if (size > zc->zc_nvlist_dst_size) {
+		error = ENOMEM;
+	} else {
+		packed = kmem_alloc(size, KM_SLEEP);
+		VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
+		    KM_SLEEP) == 0);
+		if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
+		    size, zc->zc_iflags) != 0)
+			error = EFAULT;
+		kmem_free(packed, size);
+	}
+
+	zc->zc_nvlist_dst_size = size;
+	return (error);
+}
+
+static int
+getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
+{
+	objset_t *os;
+	int error;
+
+	error = dmu_objset_hold(dsname, FTAG, &os);
+	if (error)
+		return (error);
+	if (dmu_objset_type(os) != DMU_OST_ZFS) {
+		dmu_objset_rele(os, FTAG);
+		return (EINVAL);
+	}
+
+	mutex_enter(&os->os_user_ptr_lock);
+	*zfvp = dmu_objset_get_user(os);
+	if (*zfvp) {
+		VFS_HOLD((*zfvp)->z_vfs);
+	} else {
+		error = ESRCH;
+	}
+	mutex_exit(&os->os_user_ptr_lock);
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+/*
+ * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
+ * case its z_vfs will be NULL, and it will be opened as the owner.
+ */
+static int
+zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
+{
+	int error = 0;
+
+	if (getzfsvfs(name, zfvp) != 0)
+		error = zfsvfs_create(name, zfvp);
+	if (error == 0) {
+		rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
+		    RW_READER, tag);
+		if ((*zfvp)->z_unmounted) {
+			/*
+			 * XXX we could probably try again, since the unmounting
+			 * thread should be just about to disassociate the
+			 * objset from the zfsvfs.
+			 */
+			rrw_exit(&(*zfvp)->z_teardown_lock, tag);
+			return (EBUSY);
+		}
+	}
+	return (error);
+}
+
+static void
+zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
+{
+	rrw_exit(&zfsvfs->z_teardown_lock, tag);
+
+	if (zfsvfs->z_vfs) {
+		VFS_RELE(zfsvfs->z_vfs);
+	} else {
+		dmu_objset_disown(zfsvfs->z_os, zfsvfs);
+		zfsvfs_free(zfsvfs);
+	}
+}
+
+static int
+zfs_ioc_pool_create(zfs_cmd_t *zc)
+{
+	int error;
+	nvlist_t *config, *props = NULL;
+	nvlist_t *rootprops = NULL;
+	nvlist_t *zplprops = NULL;
+	char *buf;
+
+	if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config))
+		return (error);
+
+	if (zc->zc_nvlist_src_size != 0 && (error =
+	    get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))) {
+		nvlist_free(config);
+		return (error);
+	}
+
+	if (props) {
+		nvlist_t *nvl = NULL;
+		uint64_t version = SPA_VERSION;
+
+		(void) nvlist_lookup_uint64(props,
+		    zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
+		if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) {
+			error = EINVAL;
+			goto pool_props_bad;
+		}
+		(void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
+		if (nvl) {
+			error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
+			if (error != 0) {
+				nvlist_free(config);
+				nvlist_free(props);
+				return (error);
+			}
+			(void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
+		}
+		VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		error = zfs_fill_zplprops_root(version, rootprops,
+		    zplprops, NULL);
+		if (error)
+			goto pool_props_bad;
+	}
+
+	buf = history_str_get(zc);
+
+	error = spa_create(zc->zc_name, config, props, buf, zplprops);
+
+	/*
+	 * Set the remaining root properties
+	 */
+	if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
+	    ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
+		(void) spa_destroy(zc->zc_name);
+
+	if (buf != NULL)
+		history_str_free(buf);
+
+pool_props_bad:
+	nvlist_free(rootprops);
+	nvlist_free(zplprops);
+	nvlist_free(config);
+	nvlist_free(props);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_destroy(zfs_cmd_t *zc)
+{
+	int error;
+	zfs_log_history(zc);
+	error = spa_destroy(zc->zc_name);
+	if (error == 0)
+		zvol_remove_minors(zc->zc_name);
+	return (error);
+}
+
+static int
+zfs_ioc_pool_import(zfs_cmd_t *zc)
+{
+	nvlist_t *config, *props = NULL;
+	uint64_t guid;
+	int error;
+
+	if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config)) != 0)
+		return (error);
+
+	if (zc->zc_nvlist_src_size != 0 && (error =
+	    get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))) {
+		nvlist_free(config);
+		return (error);
+	}
+
+	if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
+	    guid != zc->zc_guid)
+		error = EINVAL;
+	else
+		error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
+
+	if (zc->zc_nvlist_dst != 0) {
+		int err;
+
+		if ((err = put_nvlist(zc, config)) != 0)
+			error = err;
+	}
+
+	nvlist_free(config);
+
+	if (props)
+		nvlist_free(props);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_export(zfs_cmd_t *zc)
+{
+	int error;
+	boolean_t force = (boolean_t)zc->zc_cookie;
+	boolean_t hardforce = (boolean_t)zc->zc_guid;
+
+	zfs_log_history(zc);
+	error = spa_export(zc->zc_name, NULL, force, hardforce);
+	if (error == 0)
+		zvol_remove_minors(zc->zc_name);
+	return (error);
+}
+
+static int
+zfs_ioc_pool_configs(zfs_cmd_t *zc)
+{
+	nvlist_t *configs;
+	int error;
+
+	if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
+		return (EEXIST);
+
+	error = put_nvlist(zc, configs);
+
+	nvlist_free(configs);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_stats(zfs_cmd_t *zc)
+{
+	nvlist_t *config;
+	int error;
+	int ret = 0;
+
+	error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
+	    sizeof (zc->zc_value));
+
+	if (config != NULL) {
+		ret = put_nvlist(zc, config);
+		nvlist_free(config);
+
+		/*
+		 * The config may be present even if 'error' is non-zero.
+		 * In this case we return success, and preserve the real errno
+		 * in 'zc_cookie'.
+		 */
+		zc->zc_cookie = error;
+	} else {
+		ret = error;
+	}
+
+	return (ret);
+}
+
+/*
+ * Try to import the given pool, returning pool stats as appropriate so that
+ * user land knows which devices are available and overall pool health.
+ */
+static int
+zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
+{
+	nvlist_t *tryconfig, *config;
+	int error;
+
+	if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &tryconfig)) != 0)
+		return (error);
+
+	config = spa_tryimport(tryconfig);
+
+	nvlist_free(tryconfig);
+
+	if (config == NULL)
+		return (EINVAL);
+
+	error = put_nvlist(zc, config);
+	nvlist_free(config);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name              name of the pool
+ * zc_cookie            scan func (pool_scan_func_t)
+ */
+static int
+zfs_ioc_pool_scan(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (zc->zc_cookie == POOL_SCAN_NONE)
+		error = spa_scan_stop(spa);
+	else
+		error = spa_scan(spa, zc->zc_cookie);
+
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_freeze(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error == 0) {
+		spa_freeze(spa);
+		spa_close(spa, FTAG);
+	}
+	return (error);
+}
+
+static int
+zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) {
+		spa_close(spa, FTAG);
+		return (EINVAL);
+	}
+
+	spa_upgrade(spa, zc->zc_cookie);
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_get_history(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *hist_buf;
+	uint64_t size;
+	int error;
+
+	if ((size = zc->zc_history_len) == 0)
+		return (EINVAL);
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
+		spa_close(spa, FTAG);
+		return (ENOTSUP);
+	}
+
+	hist_buf = kmem_alloc(size, KM_SLEEP);
+	if ((error = spa_history_get(spa, &zc->zc_history_offset,
+	    &zc->zc_history_len, hist_buf)) == 0) {
+		error = ddi_copyout(hist_buf,
+		    (void *)(uintptr_t)zc->zc_history,
+		    zc->zc_history_len, zc->zc_iflags);
+	}
+
+	spa_close(spa, FTAG);
+	kmem_free(hist_buf, size);
+	return (error);
+}
+
+static int
+zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
+{
+	int error;
+
+	if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
+		return (error);
+
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_obj		object to find
+ *
+ * outputs:
+ * zc_value		name of object
+ */
+static int
+zfs_ioc_obj_to_path(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+
+	/* XXX reading from objset not owned */
+	if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
+		return (error);
+	if (dmu_objset_type(os) != DMU_OST_ZFS) {
+		dmu_objset_rele(os, FTAG);
+		return (EINVAL);
+	}
+	error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
+	    sizeof (zc->zc_value));
+	dmu_objset_rele(os, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_obj		object to find
+ *
+ * outputs:
+ * zc_stat		stats on object
+ * zc_value		path to object
+ */
+static int
+zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+
+	/* XXX reading from objset not owned */
+	if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
+		return (error);
+	if (dmu_objset_type(os) != DMU_OST_ZFS) {
+		dmu_objset_rele(os, FTAG);
+		return (EINVAL);
+	}
+	error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
+	    sizeof (zc->zc_value));
+	dmu_objset_rele(os, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_add(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	nvlist_t *config, **l2cache, **spares;
+	uint_t nl2cache = 0, nspares = 0;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config);
+	(void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
+	    &l2cache, &nl2cache);
+
+	(void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
+	    &spares, &nspares);
+
+	/*
+	 * A root pool with concatenated devices is not supported.
+	 * Thus, can not add a device to a root pool.
+	 *
+	 * Intent log device can not be added to a rootpool because
+	 * during mountroot, zil is replayed, a seperated log device
+	 * can not be accessed during the mountroot time.
+	 *
+	 * l2cache and spare devices are ok to be added to a rootpool.
+	 */
+	if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
+		nvlist_free(config);
+		spa_close(spa, FTAG);
+		return (EDOM);
+	}
+
+	if (error == 0) {
+		error = spa_vdev_add(spa, config);
+		nvlist_free(config);
+	}
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of the pool
+ * zc_nvlist_conf	nvlist of devices to remove
+ * zc_cookie		to stop the remove?
+ */
+static int
+zfs_ioc_vdev_remove(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+	error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	vdev_state_t newstate = VDEV_STATE_UNKNOWN;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+	switch (zc->zc_cookie) {
+	case VDEV_STATE_ONLINE:
+		error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
+		break;
+
+	case VDEV_STATE_OFFLINE:
+		error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
+		break;
+
+	case VDEV_STATE_FAULTED:
+		if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
+		    zc->zc_obj != VDEV_AUX_EXTERNAL)
+			zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
+
+		error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
+		break;
+
+	case VDEV_STATE_DEGRADED:
+		if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
+		    zc->zc_obj != VDEV_AUX_EXTERNAL)
+			zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
+
+		error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	zc->zc_cookie = newstate;
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_attach(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int replacing = zc->zc_cookie;
+	nvlist_t *config;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config)) == 0) {
+		error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
+		nvlist_free(config);
+	}
+
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_detach(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
+
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_split(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	nvlist_t *config, *props = NULL;
+	int error;
+	boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config)) {
+		spa_close(spa, FTAG);
+		return (error);
+	}
+
+	if (zc->zc_nvlist_src_size != 0 && (error =
+	    get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))) {
+		spa_close(spa, FTAG);
+		nvlist_free(config);
+		return (error);
+	}
+
+	error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
+
+	spa_close(spa, FTAG);
+
+	nvlist_free(config);
+	nvlist_free(props);
+
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *path = zc->zc_value;
+	uint64_t guid = zc->zc_guid;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = spa_vdev_setpath(spa, guid, path);
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *fru = zc->zc_value;
+	uint64_t guid = zc->zc_guid;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = spa_vdev_setfru(spa, guid, fru);
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
+{
+	int error = 0;
+	nvlist_t *nv;
+
+	dmu_objset_fast_stat(os, &zc->zc_objset_stats);
+
+	if (zc->zc_nvlist_dst != 0 &&
+	    (error = dsl_prop_get_all(os, &nv)) == 0) {
+		dmu_objset_stats(os, nv);
+		/*
+		 * NB: zvol_get_stats() will read the objset contents,
+		 * which we aren't supposed to do with a
+		 * DS_MODE_USER hold, because it could be
+		 * inconsistent.  So this is a bit of a workaround...
+		 * XXX reading with out owning
+		 */
+		if (!zc->zc_objset_stats.dds_inconsistent) {
+			if (dmu_objset_type(os) == DMU_OST_ZVOL)
+				VERIFY(zvol_get_stats(os, nv) == 0);
+		}
+		error = put_nvlist(zc, nv);
+		nvlist_free(nv);
+	}
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_objset_stats	stats
+ * zc_nvlist_dst	property nvlist
+ * zc_nvlist_dst_size	size of property nvlist
+ */
+static int
+zfs_ioc_objset_stats(zfs_cmd_t *zc)
+{
+	objset_t *os = NULL;
+	int error;
+
+	if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
+		return (error);
+
+	error = zfs_ioc_objset_stats_impl(zc, os);
+
+	dmu_objset_rele(os, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_nvlist_dst	received property nvlist
+ * zc_nvlist_dst_size	size of received property nvlist
+ *
+ * Gets received properties (distinct from local properties on or after
+ * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
+ * local property values.
+ */
+static int
+zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
+{
+	objset_t *os = NULL;
+	int error;
+	nvlist_t *nv;
+
+	if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
+		return (error);
+
+	/*
+	 * Without this check, we would return local property values if the
+	 * caller has not already received properties on or after
+	 * SPA_VERSION_RECVD_PROPS.
+	 */
+	if (!dsl_prop_get_hasrecvd(os)) {
+		dmu_objset_rele(os, FTAG);
+		return (ENOTSUP);
+	}
+
+	if (zc->zc_nvlist_dst != 0 &&
+	    (error = dsl_prop_get_received(os, &nv)) == 0) {
+		error = put_nvlist(zc, nv);
+		nvlist_free(nv);
+	}
+
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+static int
+nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
+{
+	uint64_t value;
+	int error;
+
+	/*
+	 * zfs_get_zplprop() will either find a value or give us
+	 * the default value (if there is one).
+	 */
+	if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
+		return (error);
+	VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_dst_size	size of buffer for zpl property nvlist
+ *
+ * outputs:
+ * zc_nvlist_dst	zpl property nvlist
+ * zc_nvlist_dst_size	size of zpl property nvlist
+ */
+static int
+zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int err;
+
+	/* XXX reading without owning */
+	if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
+		return (err);
+
+	dmu_objset_fast_stat(os, &zc->zc_objset_stats);
+
+	/*
+	 * NB: nvl_add_zplprop() will read the objset contents,
+	 * which we aren't supposed to do with a DS_MODE_USER
+	 * hold, because it could be inconsistent.
+	 */
+	if (zc->zc_nvlist_dst != NULL &&
+	    !zc->zc_objset_stats.dds_inconsistent &&
+	    dmu_objset_type(os) == DMU_OST_ZFS) {
+		nvlist_t *nv;
+
+		VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
+		    (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
+		    (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
+		    (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
+			err = put_nvlist(zc, nv);
+		nvlist_free(nv);
+	} else {
+		err = ENOENT;
+	}
+	dmu_objset_rele(os, FTAG);
+	return (err);
+}
+
+static boolean_t
+dataset_name_hidden(const char *name)
+{
+	/*
+	 * Skip over datasets that are not visible in this zone,
+	 * internal datasets (which have a $ in their name), and
+	 * temporary datasets (which have a % in their name).
+	 */
+	if (strchr(name, '$') != NULL)
+		return (B_TRUE);
+	if (strchr(name, '%') != NULL)
+		return (B_TRUE);
+	if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
+		return (B_TRUE);
+	return (B_FALSE);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_cookie		zap cursor
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_name		name of next filesystem
+ * zc_cookie		zap cursor
+ * zc_objset_stats	stats
+ * zc_nvlist_dst	property nvlist
+ * zc_nvlist_dst_size	size of property nvlist
+ */
+static int
+zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+	char *p;
+	size_t orig_len = strlen(zc->zc_name);
+
+top:
+	if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
+		if (error == ENOENT)
+			error = ESRCH;
+		return (error);
+	}
+
+	p = strrchr(zc->zc_name, '/');
+	if (p == NULL || p[1] != '\0')
+		(void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
+	p = zc->zc_name + strlen(zc->zc_name);
+
+	/*
+	 * Pre-fetch the datasets.  dmu_objset_prefetch() always returns 0
+	 * but is not declared void because its called by dmu_objset_find().
+	 */
+	if (zc->zc_cookie == 0) {
+		uint64_t cookie = 0;
+		int len = sizeof (zc->zc_name) - (p - zc->zc_name);
+
+		while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0)
+			(void) dmu_objset_prefetch(p, NULL);
+	}
+
+	do {
+		error = dmu_dir_list_next(os,
+		    sizeof (zc->zc_name) - (p - zc->zc_name), p,
+		    NULL, &zc->zc_cookie);
+		if (error == ENOENT)
+			error = ESRCH;
+	} while (error == 0 && dataset_name_hidden(zc->zc_name) &&
+	    !(zc->zc_iflags & FKIOCTL));
+	dmu_objset_rele(os, FTAG);
+
+	/*
+	 * If it's an internal dataset (ie. with a '$' in its name),
+	 * don't try to get stats for it, otherwise we'll return ENOENT.
+	 */
+	if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
+		error = zfs_ioc_objset_stats(zc); /* fill in the stats */
+		if (error == ENOENT) {
+			/* We lost a race with destroy, get the next one. */
+			zc->zc_name[orig_len] = '\0';
+			goto top;
+		}
+	}
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_cookie		zap cursor
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_name		name of next snapshot
+ * zc_objset_stats	stats
+ * zc_nvlist_dst	property nvlist
+ * zc_nvlist_dst_size	size of property nvlist
+ */
+static int
+zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+
+top:
+	if (zc->zc_cookie == 0)
+		(void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
+		    NULL, DS_FIND_SNAPSHOTS);
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &os);
+	if (error)
+		return (error == ENOENT ? ESRCH : error);
+
+	/*
+	 * A dataset name of maximum length cannot have any snapshots,
+	 * so exit immediately.
+	 */
+	if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
+		dmu_objset_rele(os, FTAG);
+		return (ESRCH);
+	}
+
+	error = dmu_snapshot_list_next(os,
+	    sizeof (zc->zc_name) - strlen(zc->zc_name),
+	    zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
+	    NULL);
+
+	if (error == 0) {
+		dsl_dataset_t *ds;
+		dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
+
+		/*
+		 * Since we probably don't have a hold on this snapshot,
+		 * it's possible that the objsetid could have been destroyed
+		 * and reused for a new objset. It's OK if this happens during
+		 * a zfs send operation, since the new createtxg will be
+		 * beyond the range we're interested in.
+		 */
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
+		rw_exit(&dp->dp_config_rwlock);
+		if (error) {
+			if (error == ENOENT) {
+				/* Racing with destroy, get the next one. */
+				*strchr(zc->zc_name, '@') = '\0';
+				dmu_objset_rele(os, FTAG);
+				goto top;
+			}
+		} else {
+			objset_t *ossnap;
+
+			error = dmu_objset_from_ds(ds, &ossnap);
+			if (error == 0)
+				error = zfs_ioc_objset_stats_impl(zc, ossnap);
+			dsl_dataset_rele(ds, FTAG);
+		}
+	} else if (error == ENOENT) {
+		error = ESRCH;
+	}
+
+	dmu_objset_rele(os, FTAG);
+	/* if we failed, undo the @ that we tacked on to zc_name */
+	if (error)
+		*strchr(zc->zc_name, '@') = '\0';
+	return (error);
+}
+
+static int
+zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
+{
+	const char *propname = nvpair_name(pair);
+	uint64_t *valary;
+	unsigned int vallen;
+	const char *domain;
+	char *dash;
+	zfs_userquota_prop_t type;
+	uint64_t rid;
+	uint64_t quota;
+	zfsvfs_t *zfsvfs;
+	int err;
+
+	if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+		if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &pair) != 0)
+			return (EINVAL);
+	}
+
+	/*
+	 * A correctly constructed propname is encoded as
+	 * userquota@<rid>-<domain>.
+	 */
+	if ((dash = strchr(propname, '-')) == NULL ||
+	    nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
+	    vallen != 3)
+		return (EINVAL);
+
+	domain = dash + 1;
+	type = valary[0];
+	rid = valary[1];
+	quota = valary[2];
+
+	err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
+	if (err == 0) {
+		err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
+		zfsvfs_rele(zfsvfs, FTAG);
+	}
+
+	return (err);
+}
+
+/*
+ * If the named property is one that has a special function to set its value,
+ * return 0 on success and a positive error code on failure; otherwise if it is
+ * not one of the special properties handled by this function, return -1.
+ *
+ * XXX: It would be better for callers of the property interface if we handled
+ * these special cases in dsl_prop.c (in the dsl layer).
+ */
+static int
+zfs_prop_set_special(const char *dsname, zprop_source_t source,
+    nvpair_t *pair)
+{
+	const char *propname = nvpair_name(pair);
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	uint64_t intval;
+	int err;
+
+	if (prop == ZPROP_INVAL) {
+		if (zfs_prop_userquota(propname))
+			return (zfs_prop_set_userquota(dsname, pair));
+		return (-1);
+	}
+
+	if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &pair) == 0);
+	}
+
+	if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
+		return (-1);
+
+	VERIFY(0 == nvpair_value_uint64(pair, &intval));
+
+	switch (prop) {
+	case ZFS_PROP_QUOTA:
+		err = dsl_dir_set_quota(dsname, source, intval);
+		break;
+	case ZFS_PROP_REFQUOTA:
+		err = dsl_dataset_set_quota(dsname, source, intval);
+		break;
+	case ZFS_PROP_RESERVATION:
+		err = dsl_dir_set_reservation(dsname, source, intval);
+		break;
+	case ZFS_PROP_REFRESERVATION:
+		err = dsl_dataset_set_reservation(dsname, source, intval);
+		break;
+	case ZFS_PROP_VOLSIZE:
+		err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip),
+		    intval);
+		break;
+	case ZFS_PROP_VERSION:
+	{
+		zfsvfs_t *zfsvfs;
+
+		if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
+			break;
+
+		err = zfs_set_version(zfsvfs, intval);
+		zfsvfs_rele(zfsvfs, FTAG);
+
+		if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
+			zfs_cmd_t *zc;
+
+			zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+			(void) strcpy(zc->zc_name, dsname);
+			(void) zfs_ioc_userspace_upgrade(zc);
+			kmem_free(zc, sizeof (zfs_cmd_t));
+		}
+		break;
+	}
+
+	default:
+		err = -1;
+	}
+
+	return (err);
+}
+
+/*
+ * This function is best effort. If it fails to set any of the given properties,
+ * it continues to set as many as it can and returns the first error
+ * encountered. If the caller provides a non-NULL errlist, it also gives the
+ * complete list of names of all the properties it failed to set along with the
+ * corresponding error numbers. The caller is responsible for freeing the
+ * returned errlist.
+ *
+ * If every property is set successfully, zero is returned and the list pointed
+ * at by errlist is NULL.
+ */
+int
+zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
+    nvlist_t **errlist)
+{
+	nvpair_t *pair;
+	nvpair_t *propval;
+	int rv = 0;
+	uint64_t intval;
+	char *strval;
+	nvlist_t *genericnvl;
+	nvlist_t *errors;
+	nvlist_t *retrynvl;
+
+	VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+retry:
+	pair = NULL;
+	while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
+		const char *propname = nvpair_name(pair);
+		zfs_prop_t prop = zfs_name_to_prop(propname);
+		int err = 0;
+
+		/* decode the property value */
+		propval = pair;
+		if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+			nvlist_t *attrs;
+			VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+			if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+			    &propval) != 0)
+				err = EINVAL;
+		}
+
+		/* Validate value type */
+		if (err == 0 && prop == ZPROP_INVAL) {
+			if (zfs_prop_user(propname)) {
+				if (nvpair_type(propval) != DATA_TYPE_STRING)
+					err = EINVAL;
+			} else if (zfs_prop_userquota(propname)) {
+				if (nvpair_type(propval) !=
+				    DATA_TYPE_UINT64_ARRAY)
+					err = EINVAL;
+			}
+		} else if (err == 0) {
+			if (nvpair_type(propval) == DATA_TYPE_STRING) {
+				if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
+					err = EINVAL;
+			} else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
+				const char *unused;
+
+				VERIFY(nvpair_value_uint64(propval,
+				    &intval) == 0);
+
+				switch (zfs_prop_get_type(prop)) {
+				case PROP_TYPE_NUMBER:
+					break;
+				case PROP_TYPE_STRING:
+					err = EINVAL;
+					break;
+				case PROP_TYPE_INDEX:
+					if (zfs_prop_index_to_string(prop,
+					    intval, &unused) != 0)
+						err = EINVAL;
+					break;
+				default:
+					cmn_err(CE_PANIC,
+					    "unknown property type");
+				}
+			} else {
+				err = EINVAL;
+			}
+		}
+
+		/* Validate permissions */
+		if (err == 0)
+			err = zfs_check_settable(dsname, pair, CRED());
+
+		if (err == 0) {
+			err = zfs_prop_set_special(dsname, source, pair);
+			if (err == -1) {
+				/*
+				 * For better performance we build up a list of
+				 * properties to set in a single transaction.
+				 */
+				err = nvlist_add_nvpair(genericnvl, pair);
+			} else if (err != 0 && nvl != retrynvl) {
+				/*
+				 * This may be a spurious error caused by
+				 * receiving quota and reservation out of order.
+				 * Try again in a second pass.
+				 */
+				err = nvlist_add_nvpair(retrynvl, pair);
+			}
+		}
+
+		if (err != 0)
+			VERIFY(nvlist_add_int32(errors, propname, err) == 0);
+	}
+
+	if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
+		nvl = retrynvl;
+		goto retry;
+	}
+
+	if (!nvlist_empty(genericnvl) &&
+	    dsl_props_set(dsname, source, genericnvl) != 0) {
+		/*
+		 * If this fails, we still want to set as many properties as we
+		 * can, so try setting them individually.
+		 */
+		pair = NULL;
+		while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
+			const char *propname = nvpair_name(pair);
+			int err = 0;
+
+			propval = pair;
+			if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+				nvlist_t *attrs;
+				VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+				VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+				    &propval) == 0);
+			}
+
+			if (nvpair_type(propval) == DATA_TYPE_STRING) {
+				VERIFY(nvpair_value_string(propval,
+				    &strval) == 0);
+				err = dsl_prop_set(dsname, propname, source, 1,
+				    strlen(strval) + 1, strval);
+			} else {
+				VERIFY(nvpair_value_uint64(propval,
+				    &intval) == 0);
+				err = dsl_prop_set(dsname, propname, source, 8,
+				    1, &intval);
+			}
+
+			if (err != 0) {
+				VERIFY(nvlist_add_int32(errors, propname,
+				    err) == 0);
+			}
+		}
+	}
+	nvlist_free(genericnvl);
+	nvlist_free(retrynvl);
+
+	if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
+		nvlist_free(errors);
+		errors = NULL;
+	} else {
+		VERIFY(nvpair_value_int32(pair, &rv) == 0);
+	}
+
+	if (errlist == NULL)
+		nvlist_free(errors);
+	else
+		*errlist = errors;
+
+	return (rv);
+}
+
+/*
+ * Check that all the properties are valid user properties.
+ */
+static int
+zfs_check_userprops(char *fsname, nvlist_t *nvl)
+{
+	nvpair_t *pair = NULL;
+	int error = 0;
+
+	while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
+		const char *propname = nvpair_name(pair);
+		char *valstr;
+
+		if (!zfs_prop_user(propname) ||
+		    nvpair_type(pair) != DATA_TYPE_STRING)
+			return (EINVAL);
+
+		if (error = zfs_secpolicy_write_perms(fsname,
+		    ZFS_DELEG_PERM_USERPROP, CRED()))
+			return (error);
+
+		if (strlen(propname) >= ZAP_MAXNAMELEN)
+			return (ENAMETOOLONG);
+
+		VERIFY(nvpair_value_string(pair, &valstr) == 0);
+		if (strlen(valstr) >= ZAP_MAXVALUELEN)
+			return (E2BIG);
+	}
+	return (0);
+}
+
+static void
+props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
+{
+	nvpair_t *pair;
+
+	VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	pair = NULL;
+	while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
+		if (nvlist_exists(skipped, nvpair_name(pair)))
+			continue;
+
+		VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
+	}
+}
+
+static int
+clear_received_props(objset_t *os, const char *fs, nvlist_t *props,
+    nvlist_t *skipped)
+{
+	int err = 0;
+	nvlist_t *cleared_props = NULL;
+	props_skip(props, skipped, &cleared_props);
+	if (!nvlist_empty(cleared_props)) {
+		/*
+		 * Acts on local properties until the dataset has received
+		 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
+		 */
+		zprop_source_t flags = (ZPROP_SRC_NONE |
+		    (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0));
+		err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL);
+	}
+	nvlist_free(cleared_props);
+	return (err);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		name of property to set
+ * zc_nvlist_src{_size}	nvlist of properties to apply
+ * zc_cookie		received properties flag
+ *
+ * outputs:
+ * zc_nvlist_dst{_size} error for each unapplied received property
+ */
+static int
+zfs_ioc_set_prop(zfs_cmd_t *zc)
+{
+	nvlist_t *nvl;
+	boolean_t received = zc->zc_cookie;
+	zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
+	    ZPROP_SRC_LOCAL);
+	nvlist_t *errors = NULL;
+	int error;
+
+	if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &nvl)) != 0)
+		return (error);
+
+	if (received) {
+		nvlist_t *origprops;
+		objset_t *os;
+
+		if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) {
+			if (dsl_prop_get_received(os, &origprops) == 0) {
+				(void) clear_received_props(os,
+				    zc->zc_name, origprops, nvl);
+				nvlist_free(origprops);
+			}
+
+			dsl_prop_set_hasrecvd(os);
+			dmu_objset_rele(os, FTAG);
+		}
+	}
+
+	error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors);
+
+	if (zc->zc_nvlist_dst != NULL && errors != NULL) {
+		(void) put_nvlist(zc, errors);
+	}
+
+	nvlist_free(errors);
+	nvlist_free(nvl);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		name of property to inherit
+ * zc_cookie		revert to received value if TRUE
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_inherit_prop(zfs_cmd_t *zc)
+{
+	const char *propname = zc->zc_value;
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	boolean_t received = zc->zc_cookie;
+	zprop_source_t source = (received
+	    ? ZPROP_SRC_NONE		/* revert to received value, if any */
+	    : ZPROP_SRC_INHERITED);	/* explicitly inherit */
+
+	if (received) {
+		nvlist_t *dummy;
+		nvpair_t *pair;
+		zprop_type_t type;
+		int err;
+
+		/*
+		 * zfs_prop_set_special() expects properties in the form of an
+		 * nvpair with type info.
+		 */
+		if (prop == ZPROP_INVAL) {
+			if (!zfs_prop_user(propname))
+				return (EINVAL);
+
+			type = PROP_TYPE_STRING;
+		} else if (prop == ZFS_PROP_VOLSIZE ||
+		    prop == ZFS_PROP_VERSION) {
+			return (EINVAL);
+		} else {
+			type = zfs_prop_get_type(prop);
+		}
+
+		VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+		switch (type) {
+		case PROP_TYPE_STRING:
+			VERIFY(0 == nvlist_add_string(dummy, propname, ""));
+			break;
+		case PROP_TYPE_NUMBER:
+		case PROP_TYPE_INDEX:
+			VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
+			break;
+		default:
+			nvlist_free(dummy);
+			return (EINVAL);
+		}
+
+		pair = nvlist_next_nvpair(dummy, NULL);
+		err = zfs_prop_set_special(zc->zc_name, source, pair);
+		nvlist_free(dummy);
+		if (err != -1)
+			return (err); /* special property already handled */
+	} else {
+		/*
+		 * Only check this in the non-received case. We want to allow
+		 * 'inherit -S' to revert non-inheritable properties like quota
+		 * and reservation to the received or default values even though
+		 * they are not considered inheritable.
+		 */
+		if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
+			return (EINVAL);
+	}
+
+	/* the property name has been validated by zfs_secpolicy_inherit() */
+	return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL));
+}
+
+static int
+zfs_ioc_pool_set_props(zfs_cmd_t *zc)
+{
+	nvlist_t *props;
+	spa_t *spa;
+	int error;
+	nvpair_t *pair;
+
+	if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))
+		return (error);
+
+	/*
+	 * If the only property is the configfile, then just do a spa_lookup()
+	 * to handle the faulted case.
+	 */
+	pair = nvlist_next_nvpair(props, NULL);
+	if (pair != NULL && strcmp(nvpair_name(pair),
+	    zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
+	    nvlist_next_nvpair(props, pair) == NULL) {
+		mutex_enter(&spa_namespace_lock);
+		if ((spa = spa_lookup(zc->zc_name)) != NULL) {
+			spa_configfile_set(spa, props, B_FALSE);
+			spa_config_sync(spa, B_FALSE, B_TRUE);
+		}
+		mutex_exit(&spa_namespace_lock);
+		if (spa != NULL) {
+			nvlist_free(props);
+			return (0);
+		}
+	}
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
+		nvlist_free(props);
+		return (error);
+	}
+
+	error = spa_prop_set(spa, props);
+
+	nvlist_free(props);
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_get_props(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	nvlist_t *nvp = NULL;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
+		/*
+		 * If the pool is faulted, there may be properties we can still
+		 * get (such as altroot and cachefile), so attempt to get them
+		 * anyway.
+		 */
+		mutex_enter(&spa_namespace_lock);
+		if ((spa = spa_lookup(zc->zc_name)) != NULL)
+			error = spa_prop_get(spa, &nvp);
+		mutex_exit(&spa_namespace_lock);
+	} else {
+		error = spa_prop_get(spa, &nvp);
+		spa_close(spa, FTAG);
+	}
+
+	if (error == 0 && zc->zc_nvlist_dst != NULL)
+		error = put_nvlist(zc, nvp);
+	else
+		error = EFAULT;
+
+	nvlist_free(nvp);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_src{_size}	nvlist of delegated permissions
+ * zc_perm_action	allow/unallow flag
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_set_fsacl(zfs_cmd_t *zc)
+{
+	int error;
+	nvlist_t *fsaclnv = NULL;
+
+	if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &fsaclnv)) != 0)
+		return (error);
+
+	/*
+	 * Verify nvlist is constructed correctly
+	 */
+	if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
+		nvlist_free(fsaclnv);
+		return (EINVAL);
+	}
+
+	/*
+	 * If we don't have PRIV_SYS_MOUNT, then validate
+	 * that user is allowed to hand out each permission in
+	 * the nvlist(s)
+	 */
+
+	error = secpolicy_zfs(CRED());
+	if (error) {
+		if (zc->zc_perm_action == B_FALSE) {
+			error = dsl_deleg_can_allow(zc->zc_name,
+			    fsaclnv, CRED());
+		} else {
+			error = dsl_deleg_can_unallow(zc->zc_name,
+			    fsaclnv, CRED());
+		}
+	}
+
+	if (error == 0)
+		error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
+
+	nvlist_free(fsaclnv);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ *
+ * outputs:
+ * zc_nvlist_src{_size}	nvlist of delegated permissions
+ */
+static int
+zfs_ioc_get_fsacl(zfs_cmd_t *zc)
+{
+	nvlist_t *nvp;
+	int error;
+
+	if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
+		error = put_nvlist(zc, nvp);
+		nvlist_free(nvp);
+	}
+
+	return (error);
+}
+
+/*
+ * Search the vfs list for a specified resource.  Returns a pointer to it
+ * or NULL if no suitable entry is found. The caller of this routine
+ * is responsible for releasing the returned vfs pointer.
+ */
+static vfs_t *
+zfs_get_vfs(const char *resource)
+{
+	struct vfs *vfsp;
+	struct vfs *vfs_found = NULL;
+
+	vfs_list_read_lock();
+	vfsp = rootvfs;
+	do {
+		if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
+			VFS_HOLD(vfsp);
+			vfs_found = vfsp;
+			break;
+		}
+		vfsp = vfsp->vfs_next;
+	} while (vfsp != rootvfs);
+	vfs_list_unlock();
+	return (vfs_found);
+}
+
+/* ARGSUSED */
+static void
+zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
+{
+	zfs_creat_t *zct = arg;
+
+	zfs_create_fs(os, cr, zct->zct_zplprops, tx);
+}
+
+#define	ZFS_PROP_UNDEFINED	((uint64_t)-1)
+
+/*
+ * inputs:
+ * createprops		list of properties requested by creator
+ * default_zplver	zpl version to use if unspecified in createprops
+ * fuids_ok		fuids allowed in this version of the spa?
+ * os			parent objset pointer (NULL if root fs)
+ *
+ * outputs:
+ * zplprops	values for the zplprops we attach to the master node object
+ * is_ci	true if requested file system will be purely case-insensitive
+ *
+ * Determine the settings for utf8only, normalization and
+ * casesensitivity.  Specific values may have been requested by the
+ * creator and/or we can inherit values from the parent dataset.  If
+ * the file system is of too early a vintage, a creator can not
+ * request settings for these properties, even if the requested
+ * setting is the default value.  We don't actually want to create dsl
+ * properties for these, so remove them from the source nvlist after
+ * processing.
+ */
+static int
+zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
+    boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
+    nvlist_t *zplprops, boolean_t *is_ci)
+{
+	uint64_t sense = ZFS_PROP_UNDEFINED;
+	uint64_t norm = ZFS_PROP_UNDEFINED;
+	uint64_t u8 = ZFS_PROP_UNDEFINED;
+
+	ASSERT(zplprops != NULL);
+
+	/*
+	 * Pull out creator prop choices, if any.
+	 */
+	if (createprops) {
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
+		(void) nvlist_remove_all(createprops,
+		    zfs_prop_to_name(ZFS_PROP_NORMALIZE));
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
+		(void) nvlist_remove_all(createprops,
+		    zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_CASE), &sense);
+		(void) nvlist_remove_all(createprops,
+		    zfs_prop_to_name(ZFS_PROP_CASE));
+	}
+
+	/*
+	 * If the zpl version requested is whacky or the file system
+	 * or pool is version is too "young" to support normalization
+	 * and the creator tried to set a value for one of the props,
+	 * error out.
+	 */
+	if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
+	    (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
+	    (zplver >= ZPL_VERSION_SA && !sa_ok) ||
+	    (zplver < ZPL_VERSION_NORMALIZATION &&
+	    (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
+	    sense != ZFS_PROP_UNDEFINED)))
+		return (ENOTSUP);
+
+	/*
+	 * Put the version in the zplprops
+	 */
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
+
+	if (norm == ZFS_PROP_UNDEFINED)
+		VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
+
+	/*
+	 * If we're normalizing, names must always be valid UTF-8 strings.
+	 */
+	if (norm)
+		u8 = 1;
+	if (u8 == ZFS_PROP_UNDEFINED)
+		VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
+
+	if (sense == ZFS_PROP_UNDEFINED)
+		VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
+
+	if (is_ci)
+		*is_ci = (sense == ZFS_CASE_INSENSITIVE);
+
+	return (0);
+}
+
+static int
+zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
+    nvlist_t *zplprops, boolean_t *is_ci)
+{
+	boolean_t fuids_ok, sa_ok;
+	uint64_t zplver = ZPL_VERSION;
+	objset_t *os = NULL;
+	char parentname[MAXNAMELEN];
+	char *cp;
+	spa_t *spa;
+	uint64_t spa_vers;
+	int error;
+
+	(void) strlcpy(parentname, dataset, sizeof (parentname));
+	cp = strrchr(parentname, '/');
+	ASSERT(cp != NULL);
+	cp[0] = '\0';
+
+	if ((error = spa_open(dataset, &spa, FTAG)) != 0)
+		return (error);
+
+	spa_vers = spa_version(spa);
+	spa_close(spa, FTAG);
+
+	zplver = zfs_zpl_version_map(spa_vers);
+	fuids_ok = (zplver >= ZPL_VERSION_FUID);
+	sa_ok = (zplver >= ZPL_VERSION_SA);
+
+	/*
+	 * Open parent object set so we can inherit zplprop values.
+	 */
+	if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
+		return (error);
+
+	error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
+	    zplprops, is_ci);
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+static int
+zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
+    nvlist_t *zplprops, boolean_t *is_ci)
+{
+	boolean_t fuids_ok;
+	boolean_t sa_ok;
+	uint64_t zplver = ZPL_VERSION;
+	int error;
+
+	zplver = zfs_zpl_version_map(spa_vers);
+	fuids_ok = (zplver >= ZPL_VERSION_FUID);
+	sa_ok = (zplver >= ZPL_VERSION_SA);
+
+	error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
+	    createprops, zplprops, is_ci);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_objset_type	type of objset to create (fs vs zvol)
+ * zc_name		name of new objset
+ * zc_value		name of snapshot to clone from (may be empty)
+ * zc_nvlist_src{_size}	nvlist of properties to apply
+ *
+ * outputs: none
+ */
+static int
+zfs_ioc_create(zfs_cmd_t *zc)
+{
+	objset_t *clone;
+	int error = 0;
+	zfs_creat_t zct;
+	nvlist_t *nvprops = NULL;
+	void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
+	dmu_objset_type_t type = zc->zc_objset_type;
+
+	switch (type) {
+
+	case DMU_OST_ZFS:
+		cbfunc = zfs_create_cb;
+		break;
+
+	case DMU_OST_ZVOL:
+		cbfunc = zvol_create_cb;
+		break;
+
+	default:
+		cbfunc = NULL;
+		break;
+	}
+	if (strchr(zc->zc_name, '@') ||
+	    strchr(zc->zc_name, '%'))
+		return (EINVAL);
+
+	if (zc->zc_nvlist_src != NULL &&
+	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &nvprops)) != 0)
+		return (error);
+
+	zct.zct_zplprops = NULL;
+	zct.zct_props = nvprops;
+
+	if (zc->zc_value[0] != '\0') {
+		/*
+		 * We're creating a clone of an existing snapshot.
+		 */
+		zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
+		if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) {
+			nvlist_free(nvprops);
+			return (EINVAL);
+		}
+
+		error = dmu_objset_hold(zc->zc_value, FTAG, &clone);
+		if (error) {
+			nvlist_free(nvprops);
+			return (error);
+		}
+
+		error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0);
+		dmu_objset_rele(clone, FTAG);
+		if (error) {
+			nvlist_free(nvprops);
+			return (error);
+		}
+	} else {
+		boolean_t is_insensitive = B_FALSE;
+
+		if (cbfunc == NULL) {
+			nvlist_free(nvprops);
+			return (EINVAL);
+		}
+
+		if (type == DMU_OST_ZVOL) {
+			uint64_t volsize, volblocksize;
+
+			if (nvprops == NULL ||
+			    nvlist_lookup_uint64(nvprops,
+			    zfs_prop_to_name(ZFS_PROP_VOLSIZE),
+			    &volsize) != 0) {
+				nvlist_free(nvprops);
+				return (EINVAL);
+			}
+
+			if ((error = nvlist_lookup_uint64(nvprops,
+			    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
+			    &volblocksize)) != 0 && error != ENOENT) {
+				nvlist_free(nvprops);
+				return (EINVAL);
+			}
+
+			if (error != 0)
+				volblocksize = zfs_prop_default_numeric(
+				    ZFS_PROP_VOLBLOCKSIZE);
+
+			if ((error = zvol_check_volblocksize(
+			    volblocksize)) != 0 ||
+			    (error = zvol_check_volsize(volsize,
+			    volblocksize)) != 0) {
+				nvlist_free(nvprops);
+				return (error);
+			}
+		} else if (type == DMU_OST_ZFS) {
+			int error;
+
+			/*
+			 * We have to have normalization and
+			 * case-folding flags correct when we do the
+			 * file system creation, so go figure them out
+			 * now.
+			 */
+			VERIFY(nvlist_alloc(&zct.zct_zplprops,
+			    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+			error = zfs_fill_zplprops(zc->zc_name, nvprops,
+			    zct.zct_zplprops, &is_insensitive);
+			if (error != 0) {
+				nvlist_free(nvprops);
+				nvlist_free(zct.zct_zplprops);
+				return (error);
+			}
+		}
+		error = dmu_objset_create(zc->zc_name, type,
+		    is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
+		nvlist_free(zct.zct_zplprops);
+	}
+
+	/*
+	 * It would be nice to do this atomically.
+	 */
+	if (error == 0) {
+		error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL,
+		    nvprops, NULL);
+		if (error != 0)
+			(void) dmu_objset_destroy(zc->zc_name, B_FALSE);
+	}
+	nvlist_free(nvprops);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of filesystem
+ * zc_value	short name of snapshot
+ * zc_cookie	recursive flag
+ * zc_nvlist_src[_size] property list
+ *
+ * outputs:
+ * zc_value	short snapname (i.e. part after the '@')
+ */
+static int
+zfs_ioc_snapshot(zfs_cmd_t *zc)
+{
+	nvlist_t *nvprops = NULL;
+	int error;
+	boolean_t recursive = zc->zc_cookie;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+
+	if (zc->zc_nvlist_src != NULL &&
+	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &nvprops)) != 0)
+		return (error);
+
+	error = zfs_check_userprops(zc->zc_name, nvprops);
+	if (error)
+		goto out;
+
+	if (!nvlist_empty(nvprops) &&
+	    zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) {
+		error = ENOTSUP;
+		goto out;
+	}
+
+	error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, NULL,
+	    nvprops, recursive, B_FALSE, -1);
+
+out:
+	nvlist_free(nvprops);
+	return (error);
+}
+
+int
+zfs_unmount_snap(const char *name, void *arg)
+{
+	vfs_t *vfsp = NULL;
+
+	if (arg) {
+		char *snapname = arg;
+		char *fullname = kmem_asprintf("%s@%s", name, snapname);
+		vfsp = zfs_get_vfs(fullname);
+		strfree(fullname);
+	} else if (strchr(name, '@')) {
+		vfsp = zfs_get_vfs(name);
+	}
+
+	if (vfsp) {
+		/*
+		 * Always force the unmount for snapshots.
+		 */
+		int flag = MS_FORCE;
+		int err;
+
+		if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
+			VFS_RELE(vfsp);
+			return (err);
+		}
+		VFS_RELE(vfsp);
+		if ((err = dounmount(vfsp, flag, kcred)) != 0)
+			return (err);
+	}
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		short name of snapshot
+ * zc_defer_destroy	mark for deferred destroy
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_destroy_snaps(zfs_cmd_t *zc)
+{
+	int err;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+	err = dmu_objset_find(zc->zc_name,
+	    zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN);
+	if (err)
+		return (err);
+	return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value,
+	    zc->zc_defer_destroy));
+}
+
+/*
+ * inputs:
+ * zc_name		name of dataset to destroy
+ * zc_objset_type	type of objset
+ * zc_defer_destroy	mark for deferred destroy
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_destroy(zfs_cmd_t *zc)
+{
+	int err;
+	if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
+		err = zfs_unmount_snap(zc->zc_name, NULL);
+		if (err)
+			return (err);
+	}
+
+	err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
+	if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
+		(void) zvol_remove_minor(zc->zc_name);
+	return (err);
+}
+
+/*
+ * inputs:
+ * zc_name	name of dataset to rollback (to most recent snapshot)
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_rollback(zfs_cmd_t *zc)
+{
+	dsl_dataset_t *ds, *clone;
+	int error;
+	zfsvfs_t *zfsvfs;
+	char *clone_name;
+
+	error = dsl_dataset_hold(zc->zc_name, FTAG, &ds);
+	if (error)
+		return (error);
+
+	/* must not be a snapshot */
+	if (dsl_dataset_is_snapshot(ds)) {
+		dsl_dataset_rele(ds, FTAG);
+		return (EINVAL);
+	}
+
+	/* must have a most recent snapshot */
+	if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) {
+		dsl_dataset_rele(ds, FTAG);
+		return (EINVAL);
+	}
+
+	/*
+	 * Create clone of most recent snapshot.
+	 */
+	clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name);
+	error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT);
+	if (error)
+		goto out;
+
+	error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone);
+	if (error)
+		goto out;
+
+	/*
+	 * Do clone swap.
+	 */
+	if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
+		error = zfs_suspend_fs(zfsvfs);
+		if (error == 0) {
+			int resume_err;
+
+			if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
+				error = dsl_dataset_clone_swap(clone, ds,
+				    B_TRUE);
+				dsl_dataset_disown(ds, FTAG);
+				ds = NULL;
+			} else {
+				error = EBUSY;
+			}
+			resume_err = zfs_resume_fs(zfsvfs, zc->zc_name);
+			error = error ? error : resume_err;
+		}
+		VFS_RELE(zfsvfs->z_vfs);
+	} else {
+		if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
+			error = dsl_dataset_clone_swap(clone, ds, B_TRUE);
+			dsl_dataset_disown(ds, FTAG);
+			ds = NULL;
+		} else {
+			error = EBUSY;
+		}
+	}
+
+	/*
+	 * Destroy clone (which also closes it).
+	 */
+	(void) dsl_dataset_destroy(clone, FTAG, B_FALSE);
+
+out:
+	strfree(clone_name);
+	if (ds)
+		dsl_dataset_rele(ds, FTAG);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	old name of dataset
+ * zc_value	new name of dataset
+ * zc_cookie	recursive flag (only valid for snapshots)
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_rename(zfs_cmd_t *zc)
+{
+	boolean_t recursive = zc->zc_cookie & 1;
+
+	zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
+	if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
+	    strchr(zc->zc_value, '%'))
+		return (EINVAL);
+
+	/*
+	 * Unmount snapshot unless we're doing a recursive rename,
+	 * in which case the dataset code figures out which snapshots
+	 * to unmount.
+	 */
+	if (!recursive && strchr(zc->zc_name, '@') != NULL &&
+	    zc->zc_objset_type == DMU_OST_ZFS) {
+		int err = zfs_unmount_snap(zc->zc_name, NULL);
+		if (err)
+			return (err);
+	}
+	if (zc->zc_objset_type == DMU_OST_ZVOL)
+		(void) zvol_remove_minor(zc->zc_name);
+	return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
+}
+
+static int
+zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
+{
+	const char *propname = nvpair_name(pair);
+	boolean_t issnap = (strchr(dsname, '@') != NULL);
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	uint64_t intval;
+	int err;
+
+	if (prop == ZPROP_INVAL) {
+		if (zfs_prop_user(propname)) {
+			if (err = zfs_secpolicy_write_perms(dsname,
+			    ZFS_DELEG_PERM_USERPROP, cr))
+				return (err);
+			return (0);
+		}
+
+		if (!issnap && zfs_prop_userquota(propname)) {
+			const char *perm = NULL;
+			const char *uq_prefix =
+			    zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
+			const char *gq_prefix =
+			    zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
+
+			if (strncmp(propname, uq_prefix,
+			    strlen(uq_prefix)) == 0) {
+				perm = ZFS_DELEG_PERM_USERQUOTA;
+			} else if (strncmp(propname, gq_prefix,
+			    strlen(gq_prefix)) == 0) {
+				perm = ZFS_DELEG_PERM_GROUPQUOTA;
+			} else {
+				/* USERUSED and GROUPUSED are read-only */
+				return (EINVAL);
+			}
+
+			if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
+				return (err);
+			return (0);
+		}
+
+		return (EINVAL);
+	}
+
+	if (issnap)
+		return (EINVAL);
+
+	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);
+	}
+
+	/*
+	 * Check that this value is valid for this pool version
+	 */
+	switch (prop) {
+	case ZFS_PROP_COMPRESSION:
+		/*
+		 * If the user specified gzip compression, make sure
+		 * the SPA supports it. We ignore any errors here since
+		 * we'll catch them later.
+		 */
+		if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
+		    nvpair_value_uint64(pair, &intval) == 0) {
+			if (intval >= ZIO_COMPRESS_GZIP_1 &&
+			    intval <= ZIO_COMPRESS_GZIP_9 &&
+			    zfs_earlier_version(dsname,
+			    SPA_VERSION_GZIP_COMPRESSION)) {
+				return (ENOTSUP);
+			}
+
+			if (intval == ZIO_COMPRESS_ZLE &&
+			    zfs_earlier_version(dsname,
+			    SPA_VERSION_ZLE_COMPRESSION))
+				return (ENOTSUP);
+
+			/*
+			 * If this is a bootable dataset then
+			 * verify that the compression algorithm
+			 * is supported for booting. We must return
+			 * something other than ENOTSUP since it
+			 * implies a downrev pool version.
+			 */
+			if (zfs_is_bootfs(dsname) &&
+			    !BOOTFS_COMPRESS_VALID(intval)) {
+				return (ERANGE);
+			}
+		}
+		break;
+
+	case ZFS_PROP_COPIES:
+		if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
+			return (ENOTSUP);
+		break;
+
+	case ZFS_PROP_DEDUP:
+		if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
+			return (ENOTSUP);
+		break;
+
+	case ZFS_PROP_SHARESMB:
+		if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
+			return (ENOTSUP);
+		break;
+
+	case ZFS_PROP_ACLINHERIT:
+		if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
+		    nvpair_value_uint64(pair, &intval) == 0) {
+			if (intval == ZFS_ACL_PASSTHROUGH_X &&
+			    zfs_earlier_version(dsname,
+			    SPA_VERSION_PASSTHROUGH_X))
+				return (ENOTSUP);
+		}
+		break;
+	}
+
+	return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
+}
+
+/*
+ * Removes properties from the given props list that fail permission checks
+ * needed to clear them and to restore them in case of a receive error. For each
+ * property, make sure we have both set and inherit permissions.
+ *
+ * Returns the first error encountered if any permission checks fail. If the
+ * caller provides a non-NULL errlist, it also gives the complete list of names
+ * of all the properties that failed a permission check along with the
+ * corresponding error numbers. The caller is responsible for freeing the
+ * returned errlist.
+ *
+ * If every property checks out successfully, zero is returned and the list
+ * pointed at by errlist is NULL.
+ */
+static int
+zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
+{
+	zfs_cmd_t *zc;
+	nvpair_t *pair, *next_pair;
+	nvlist_t *errors;
+	int err, rv = 0;
+
+	if (props == NULL)
+		return (0);
+
+	VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
+	(void) strcpy(zc->zc_name, dataset);
+	pair = nvlist_next_nvpair(props, NULL);
+	while (pair != NULL) {
+		next_pair = nvlist_next_nvpair(props, pair);
+
+		(void) strcpy(zc->zc_value, nvpair_name(pair));
+		if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
+		    (err = zfs_secpolicy_inherit(zc, CRED())) != 0) {
+			VERIFY(nvlist_remove_nvpair(props, pair) == 0);
+			VERIFY(nvlist_add_int32(errors,
+			    zc->zc_value, err) == 0);
+		}
+		pair = next_pair;
+	}
+	kmem_free(zc, sizeof (zfs_cmd_t));
+
+	if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
+		nvlist_free(errors);
+		errors = NULL;
+	} else {
+		VERIFY(nvpair_value_int32(pair, &rv) == 0);
+	}
+
+	if (errlist == NULL)
+		nvlist_free(errors);
+	else
+		*errlist = errors;
+
+	return (rv);
+}
+
+static boolean_t
+propval_equals(nvpair_t *p1, nvpair_t *p2)
+{
+	if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
+		/* dsl_prop_get_all_impl() format */
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &p1) == 0);
+	}
+
+	if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &p2) == 0);
+	}
+
+	if (nvpair_type(p1) != nvpair_type(p2))
+		return (B_FALSE);
+
+	if (nvpair_type(p1) == DATA_TYPE_STRING) {
+		char *valstr1, *valstr2;
+
+		VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
+		VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
+		return (strcmp(valstr1, valstr2) == 0);
+	} else {
+		uint64_t intval1, intval2;
+
+		VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
+		VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
+		return (intval1 == intval2);
+	}
+}
+
+/*
+ * Remove properties from props if they are not going to change (as determined
+ * by comparison with origprops). Remove them from origprops as well, since we
+ * do not need to clear or restore properties that won't change.
+ */
+static void
+props_reduce(nvlist_t *props, nvlist_t *origprops)
+{
+	nvpair_t *pair, *next_pair;
+
+	if (origprops == NULL)
+		return; /* all props need to be received */
+
+	pair = nvlist_next_nvpair(props, NULL);
+	while (pair != NULL) {
+		const char *propname = nvpair_name(pair);
+		nvpair_t *match;
+
+		next_pair = nvlist_next_nvpair(props, pair);
+
+		if ((nvlist_lookup_nvpair(origprops, propname,
+		    &match) != 0) || !propval_equals(pair, match))
+			goto next; /* need to set received value */
+
+		/* don't clear the existing received value */
+		(void) nvlist_remove_nvpair(origprops, match);
+		/* don't bother receiving the property */
+		(void) nvlist_remove_nvpair(props, pair);
+next:
+		pair = next_pair;
+	}
+}
+
+#ifdef	DEBUG
+static boolean_t zfs_ioc_recv_inject_err;
+#endif
+
+/*
+ * inputs:
+ * zc_name		name of containing filesystem
+ * zc_nvlist_src{_size}	nvlist of properties to apply
+ * zc_value		name of snapshot to create
+ * zc_string		name of clone origin (if DRR_FLAG_CLONE)
+ * zc_cookie		file descriptor to recv from
+ * zc_begin_record	the BEGIN record of the stream (not byteswapped)
+ * zc_guid		force flag
+ * zc_cleanup_fd	cleanup-on-exit file descriptor
+ * zc_action_handle	handle for this guid/ds mapping (or zero on first call)
+ *
+ * outputs:
+ * zc_cookie		number of bytes read
+ * zc_nvlist_dst{_size} error for each unapplied received property
+ * zc_obj		zprop_errflags_t
+ * zc_action_handle	handle for this guid/ds mapping
+ */
+static int
+zfs_ioc_recv(zfs_cmd_t *zc)
+{
+	file_t *fp;
+	objset_t *os;
+	dmu_recv_cookie_t drc;
+	boolean_t force = (boolean_t)zc->zc_guid;
+	int fd;
+	int error = 0;
+	int props_error = 0;
+	nvlist_t *errors;
+	offset_t off;
+	nvlist_t *props = NULL; /* sent properties */
+	nvlist_t *origprops = NULL; /* existing properties */
+	objset_t *origin = NULL;
+	char *tosnap;
+	char tofs[ZFS_MAXNAMELEN];
+	boolean_t first_recvd_props = B_FALSE;
+
+	if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
+	    strchr(zc->zc_value, '@') == NULL ||
+	    strchr(zc->zc_value, '%'))
+		return (EINVAL);
+
+	(void) strcpy(tofs, zc->zc_value);
+	tosnap = strchr(tofs, '@');
+	*tosnap++ = '\0';
+
+	if (zc->zc_nvlist_src != NULL &&
+	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props)) != 0)
+		return (error);
+
+	fd = zc->zc_cookie;
+	fp = getf(fd);
+	if (fp == NULL) {
+		nvlist_free(props);
+		return (EBADF);
+	}
+
+	VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) {
+		if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) &&
+		    !dsl_prop_get_hasrecvd(os)) {
+			first_recvd_props = B_TRUE;
+		}
+
+		/*
+		 * If new received properties are supplied, they are to
+		 * completely replace the existing received properties, so stash
+		 * away the existing ones.
+		 */
+		if (dsl_prop_get_received(os, &origprops) == 0) {
+			nvlist_t *errlist = NULL;
+			/*
+			 * Don't bother writing a property if its value won't
+			 * change (and avoid the unnecessary security checks).
+			 *
+			 * The first receive after SPA_VERSION_RECVD_PROPS is a
+			 * special case where we blow away all local properties
+			 * regardless.
+			 */
+			if (!first_recvd_props)
+				props_reduce(props, origprops);
+			if (zfs_check_clearable(tofs, origprops,
+			    &errlist) != 0)
+				(void) nvlist_merge(errors, errlist, 0);
+			nvlist_free(errlist);
+		}
+
+		dmu_objset_rele(os, FTAG);
+	}
+
+	if (zc->zc_string[0]) {
+		error = dmu_objset_hold(zc->zc_string, FTAG, &origin);
+		if (error)
+			goto out;
+	}
+
+	error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds,
+	    &zc->zc_begin_record, force, origin, &drc);
+	if (origin)
+		dmu_objset_rele(origin, FTAG);
+	if (error)
+		goto out;
+
+	/*
+	 * Set properties before we receive the stream so that they are applied
+	 * to the new data. Note that we must call dmu_recv_stream() if
+	 * dmu_recv_begin() succeeds.
+	 */
+	if (props) {
+		nvlist_t *errlist;
+
+		if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) {
+			if (drc.drc_newfs) {
+				if (spa_version(os->os_spa) >=
+				    SPA_VERSION_RECVD_PROPS)
+					first_recvd_props = B_TRUE;
+			} else if (origprops != NULL) {
+				if (clear_received_props(os, tofs, origprops,
+				    first_recvd_props ? NULL : props) != 0)
+					zc->zc_obj |= ZPROP_ERR_NOCLEAR;
+			} else {
+				zc->zc_obj |= ZPROP_ERR_NOCLEAR;
+			}
+			dsl_prop_set_hasrecvd(os);
+		} else if (!drc.drc_newfs) {
+			zc->zc_obj |= ZPROP_ERR_NOCLEAR;
+		}
+
+		(void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
+		    props, &errlist);
+		(void) nvlist_merge(errors, errlist, 0);
+		nvlist_free(errlist);
+	}
+
+	if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) {
+		/*
+		 * Caller made zc->zc_nvlist_dst less than the minimum expected
+		 * size or supplied an invalid address.
+		 */
+		props_error = EINVAL;
+	}
+
+	off = fp->f_offset;
+	error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
+	    &zc->zc_action_handle);
+
+	if (error == 0) {
+		zfsvfs_t *zfsvfs = NULL;
+
+		if (getzfsvfs(tofs, &zfsvfs) == 0) {
+			/* online recv */
+			int end_err;
+
+			error = zfs_suspend_fs(zfsvfs);
+			/*
+			 * If the suspend fails, then the recv_end will
+			 * likely also fail, and clean up after itself.
+			 */
+			end_err = dmu_recv_end(&drc);
+			if (error == 0)
+				error = zfs_resume_fs(zfsvfs, tofs);
+			error = error ? error : end_err;
+			VFS_RELE(zfsvfs->z_vfs);
+		} else {
+			error = dmu_recv_end(&drc);
+		}
+	}
+
+	zc->zc_cookie = off - fp->f_offset;
+	if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
+		fp->f_offset = off;
+
+#ifdef	DEBUG
+	if (zfs_ioc_recv_inject_err) {
+		zfs_ioc_recv_inject_err = B_FALSE;
+		error = 1;
+	}
+#endif
+	/*
+	 * On error, restore the original props.
+	 */
+	if (error && props) {
+		if (dmu_objset_hold(tofs, FTAG, &os) == 0) {
+			if (clear_received_props(os, tofs, props, NULL) != 0) {
+				/*
+				 * We failed to clear the received properties.
+				 * Since we may have left a $recvd value on the
+				 * system, we can't clear the $hasrecvd flag.
+				 */
+				zc->zc_obj |= ZPROP_ERR_NORESTORE;
+			} else if (first_recvd_props) {
+				dsl_prop_unset_hasrecvd(os);
+			}
+			dmu_objset_rele(os, FTAG);
+		} else if (!drc.drc_newfs) {
+			/* We failed to clear the received properties. */
+			zc->zc_obj |= ZPROP_ERR_NORESTORE;
+		}
+
+		if (origprops == NULL && !drc.drc_newfs) {
+			/* We failed to stash the original properties. */
+			zc->zc_obj |= ZPROP_ERR_NORESTORE;
+		}
+
+		/*
+		 * dsl_props_set() will not convert RECEIVED to LOCAL on or
+		 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
+		 * explictly if we're restoring local properties cleared in the
+		 * first new-style receive.
+		 */
+		if (origprops != NULL &&
+		    zfs_set_prop_nvlist(tofs, (first_recvd_props ?
+		    ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
+		    origprops, NULL) != 0) {
+			/*
+			 * We stashed the original properties but failed to
+			 * restore them.
+			 */
+			zc->zc_obj |= ZPROP_ERR_NORESTORE;
+		}
+	}
+out:
+	nvlist_free(props);
+	nvlist_free(origprops);
+	nvlist_free(errors);
+	releasef(fd);
+
+	if (error == 0)
+		error = props_error;
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of snapshot to send
+ * zc_cookie	file descriptor to send stream to
+ * zc_obj	fromorigin flag (mutually exclusive with zc_fromobj)
+ * zc_sendobj	objsetid of snapshot to send
+ * zc_fromobj	objsetid of incremental fromsnap (may be zero)
+ *
+ * outputs: none
+ */
+static int
+zfs_ioc_send(zfs_cmd_t *zc)
+{
+	objset_t *fromsnap = NULL;
+	objset_t *tosnap;
+	file_t *fp;
+	int error;
+	offset_t off;
+	dsl_dataset_t *ds;
+	dsl_dataset_t *dsfrom = NULL;
+	spa_t *spa;
+	dsl_pool_t *dp;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error)
+		return (error);
+
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
+	rw_exit(&dp->dp_config_rwlock);
+	if (error) {
+		spa_close(spa, FTAG);
+		return (error);
+	}
+
+	error = dmu_objset_from_ds(ds, &tosnap);
+	if (error) {
+		dsl_dataset_rele(ds, FTAG);
+		spa_close(spa, FTAG);
+		return (error);
+	}
+
+	if (zc->zc_fromobj != 0) {
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
+		rw_exit(&dp->dp_config_rwlock);
+		spa_close(spa, FTAG);
+		if (error) {
+			dsl_dataset_rele(ds, FTAG);
+			return (error);
+		}
+		error = dmu_objset_from_ds(dsfrom, &fromsnap);
+		if (error) {
+			dsl_dataset_rele(dsfrom, FTAG);
+			dsl_dataset_rele(ds, FTAG);
+			return (error);
+		}
+	} else {
+		spa_close(spa, FTAG);
+	}
+
+	fp = getf(zc->zc_cookie);
+	if (fp == NULL) {
+		dsl_dataset_rele(ds, FTAG);
+		if (dsfrom)
+			dsl_dataset_rele(dsfrom, FTAG);
+		return (EBADF);
+	}
+
+	off = fp->f_offset;
+	error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off);
+
+	if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
+		fp->f_offset = off;
+	releasef(zc->zc_cookie);
+	if (dsfrom)
+		dsl_dataset_rele(dsfrom, FTAG);
+	dsl_dataset_rele(ds, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_inject_fault(zfs_cmd_t *zc)
+{
+	int id, error;
+
+	error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
+	    &zc->zc_inject_record);
+
+	if (error == 0)
+		zc->zc_guid = (uint64_t)id;
+
+	return (error);
+}
+
+static int
+zfs_ioc_clear_fault(zfs_cmd_t *zc)
+{
+	return (zio_clear_fault((int)zc->zc_guid));
+}
+
+static int
+zfs_ioc_inject_list_next(zfs_cmd_t *zc)
+{
+	int id = (int)zc->zc_guid;
+	int error;
+
+	error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
+	    &zc->zc_inject_record);
+
+	zc->zc_guid = id;
+
+	return (error);
+}
+
+static int
+zfs_ioc_error_log(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	size_t count = (size_t)zc->zc_nvlist_dst_size;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
+	    &count);
+	if (error == 0)
+		zc->zc_nvlist_dst_size = count;
+	else
+		zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
+
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_clear(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	vdev_t *vd;
+	int error;
+
+	/*
+	 * On zpool clear we also fix up missing slogs
+	 */
+	mutex_enter(&spa_namespace_lock);
+	spa = spa_lookup(zc->zc_name);
+	if (spa == NULL) {
+		mutex_exit(&spa_namespace_lock);
+		return (EIO);
+	}
+	if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
+		/* we need to let spa_open/spa_load clear the chains */
+		spa_set_log_state(spa, SPA_LOG_CLEAR);
+	}
+	spa->spa_last_open_failed = 0;
+	mutex_exit(&spa_namespace_lock);
+
+	if (zc->zc_cookie & ZPOOL_NO_REWIND) {
+		error = spa_open(zc->zc_name, &spa, FTAG);
+	} else {
+		nvlist_t *policy;
+		nvlist_t *config = NULL;
+
+		if (zc->zc_nvlist_src == NULL)
+			return (EINVAL);
+
+		if ((error = get_nvlist(zc->zc_nvlist_src,
+		    zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
+			error = spa_open_rewind(zc->zc_name, &spa, FTAG,
+			    policy, &config);
+			if (config != NULL) {
+				int err;
+
+				if ((err = put_nvlist(zc, config)) != 0)
+					error = err;
+				nvlist_free(config);
+			}
+			nvlist_free(policy);
+		}
+	}
+
+	if (error)
+		return (error);
+
+	spa_vdev_state_enter(spa, SCL_NONE);
+
+	if (zc->zc_guid == 0) {
+		vd = NULL;
+	} else {
+		vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
+		if (vd == NULL) {
+			(void) spa_vdev_state_exit(spa, NULL, ENODEV);
+			spa_close(spa, FTAG);
+			return (ENODEV);
+		}
+	}
+
+	vdev_clear(spa, vd);
+
+	(void) spa_vdev_state_exit(spa, NULL, 0);
+
+	/*
+	 * Resume any suspended I/Os.
+	 */
+	if (zio_resume(spa) != 0)
+		error = EIO;
+
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of filesystem
+ * zc_value	name of origin snapshot
+ *
+ * outputs:
+ * zc_string	name of conflicting snapshot, if there is one
+ */
+static int
+zfs_ioc_promote(zfs_cmd_t *zc)
+{
+	char *cp;
+
+	/*
+	 * We don't need to unmount *all* the origin fs's snapshots, but
+	 * it's easier.
+	 */
+	cp = strchr(zc->zc_value, '@');
+	if (cp)
+		*cp = '\0';
+	(void) dmu_objset_find(zc->zc_value,
+	    zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
+	return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
+}
+
+/*
+ * Retrieve a single {user|group}{used|quota}@... property.
+ *
+ * inputs:
+ * zc_name	name of filesystem
+ * zc_objset_type zfs_userquota_prop_t
+ * zc_value	domain name (eg. "S-1-234-567-89")
+ * zc_guid	RID/UID/GID
+ *
+ * outputs:
+ * zc_cookie	property value
+ */
+static int
+zfs_ioc_userspace_one(zfs_cmd_t *zc)
+{
+	zfsvfs_t *zfsvfs;
+	int error;
+
+	if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
+		return (EINVAL);
+
+	error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
+	if (error)
+		return (error);
+
+	error = zfs_userspace_one(zfsvfs,
+	    zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
+	zfsvfs_rele(zfsvfs, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_cookie		zap cursor
+ * zc_objset_type	zfs_userquota_prop_t
+ * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
+ *
+ * outputs:
+ * zc_nvlist_dst[_size]	data buffer (array of zfs_useracct_t)
+ * zc_cookie	zap cursor
+ */
+static int
+zfs_ioc_userspace_many(zfs_cmd_t *zc)
+{
+	zfsvfs_t *zfsvfs;
+	int bufsize = zc->zc_nvlist_dst_size;
+
+	if (bufsize <= 0)
+		return (ENOMEM);
+
+	int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
+	if (error)
+		return (error);
+
+	void *buf = kmem_alloc(bufsize, KM_SLEEP);
+
+	error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
+	    buf, &zc->zc_nvlist_dst_size);
+
+	if (error == 0) {
+		error = xcopyout(buf,
+		    (void *)(uintptr_t)zc->zc_nvlist_dst,
+		    zc->zc_nvlist_dst_size);
+	}
+	kmem_free(buf, bufsize);
+	zfsvfs_rele(zfsvfs, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ *
+ * outputs:
+ * none
+ */
+static int
+zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error = 0;
+	zfsvfs_t *zfsvfs;
+
+	if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
+		if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
+			/*
+			 * If userused is not enabled, it may be because the
+			 * objset needs to be closed & reopened (to grow the
+			 * objset_phys_t).  Suspend/resume the fs will do that.
+			 */
+			error = zfs_suspend_fs(zfsvfs);
+			if (error == 0)
+				error = zfs_resume_fs(zfsvfs, zc->zc_name);
+		}
+		if (error == 0)
+			error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
+		VFS_RELE(zfsvfs->z_vfs);
+	} else {
+		/* XXX kind of reading contents without owning */
+		error = dmu_objset_hold(zc->zc_name, FTAG, &os);
+		if (error)
+			return (error);
+
+		error = dmu_objset_userspace_upgrade(os);
+		dmu_objset_rele(os, FTAG);
+	}
+
+	return (error);
+}
+
+/*
+ * We don't want to have a hard dependency
+ * against some special symbols in sharefs
+ * nfs, and smbsrv.  Determine them if needed when
+ * the first file system is shared.
+ * Neither sharefs, nfs or smbsrv are unloadable modules.
+ */
+int (*znfsexport_fs)(void *arg);
+int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
+int (*zsmbexport_fs)(void *arg, boolean_t add_share);
+
+int zfs_nfsshare_inited;
+int zfs_smbshare_inited;
+
+ddi_modhandle_t nfs_mod;
+ddi_modhandle_t sharefs_mod;
+ddi_modhandle_t smbsrv_mod;
+kmutex_t zfs_share_lock;
+
+static int
+zfs_init_sharefs()
+{
+	int error;
+
+	ASSERT(MUTEX_HELD(&zfs_share_lock));
+	/* Both NFS and SMB shares also require sharetab support. */
+	if (sharefs_mod == NULL && ((sharefs_mod =
+	    ddi_modopen("fs/sharefs",
+	    KRTLD_MODE_FIRST, &error)) == NULL)) {
+		return (ENOSYS);
+	}
+	if (zshare_fs == NULL && ((zshare_fs =
+	    (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
+	    ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
+		return (ENOSYS);
+	}
+	return (0);
+}
+
+static int
+zfs_ioc_share(zfs_cmd_t *zc)
+{
+	int error;
+	int opcode;
+
+	switch (zc->zc_share.z_sharetype) {
+	case ZFS_SHARE_NFS:
+	case ZFS_UNSHARE_NFS:
+		if (zfs_nfsshare_inited == 0) {
+			mutex_enter(&zfs_share_lock);
+			if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
+			    KRTLD_MODE_FIRST, &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			if (znfsexport_fs == NULL &&
+			    ((znfsexport_fs = (int (*)(void *))
+			    ddi_modsym(nfs_mod,
+			    "nfs_export", &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			error = zfs_init_sharefs();
+			if (error) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			zfs_nfsshare_inited = 1;
+			mutex_exit(&zfs_share_lock);
+		}
+		break;
+	case ZFS_SHARE_SMB:
+	case ZFS_UNSHARE_SMB:
+		if (zfs_smbshare_inited == 0) {
+			mutex_enter(&zfs_share_lock);
+			if (smbsrv_mod == NULL && ((smbsrv_mod =
+			    ddi_modopen("drv/smbsrv",
+			    KRTLD_MODE_FIRST, &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			if (zsmbexport_fs == NULL && ((zsmbexport_fs =
+			    (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
+			    "smb_server_share", &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			error = zfs_init_sharefs();
+			if (error) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			zfs_smbshare_inited = 1;
+			mutex_exit(&zfs_share_lock);
+		}
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	switch (zc->zc_share.z_sharetype) {
+	case ZFS_SHARE_NFS:
+	case ZFS_UNSHARE_NFS:
+		if (error =
+		    znfsexport_fs((void *)
+		    (uintptr_t)zc->zc_share.z_exportdata))
+			return (error);
+		break;
+	case ZFS_SHARE_SMB:
+	case ZFS_UNSHARE_SMB:
+		if (error = zsmbexport_fs((void *)
+		    (uintptr_t)zc->zc_share.z_exportdata,
+		    zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
+		    B_TRUE: B_FALSE)) {
+			return (error);
+		}
+		break;
+	}
+
+	opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
+	    zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
+	    SHAREFS_ADD : SHAREFS_REMOVE;
+
+	/*
+	 * Add or remove share from sharetab
+	 */
+	error = zshare_fs(opcode,
+	    (void *)(uintptr_t)zc->zc_share.z_sharedata,
+	    zc->zc_share.z_sharemax);
+
+	return (error);
+
+}
+
+ace_t full_access[] = {
+	{(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
+};
+
+/*
+ * inputs:
+ * zc_name		name of containing filesystem
+ * zc_obj		object # beyond which we want next in-use object #
+ *
+ * outputs:
+ * zc_obj		next in-use object #
+ */
+static int
+zfs_ioc_next_obj(zfs_cmd_t *zc)
+{
+	objset_t *os = NULL;
+	int error;
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &os);
+	if (error)
+		return (error);
+
+	error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
+	    os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
+
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		prefix name for snapshot
+ * zc_cleanup_fd	cleanup-on-exit file descriptor for calling process
+ *
+ * outputs:
+ */
+static int
+zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
+{
+	char *snap_name;
+	int error;
+
+	snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
+	    (u_longlong_t)ddi_get_lbolt64());
+
+	if (strlen(snap_name) >= MAXNAMELEN) {
+		strfree(snap_name);
+		return (E2BIG);
+	}
+
+	error = dmu_objset_snapshot(zc->zc_name, snap_name, snap_name,
+	    NULL, B_FALSE, B_TRUE, zc->zc_cleanup_fd);
+	if (error != 0) {
+		strfree(snap_name);
+		return (error);
+	}
+
+	(void) strcpy(zc->zc_value, snap_name);
+	strfree(snap_name);
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of "to" snapshot
+ * zc_value		name of "from" snapshot
+ * zc_cookie		file descriptor to write diff data on
+ *
+ * outputs:
+ * dmu_diff_record_t's to the file descriptor
+ */
+static int
+zfs_ioc_diff(zfs_cmd_t *zc)
+{
+	objset_t *fromsnap;
+	objset_t *tosnap;
+	file_t *fp;
+	offset_t off;
+	int error;
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap);
+	if (error)
+		return (error);
+
+	error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap);
+	if (error) {
+		dmu_objset_rele(tosnap, FTAG);
+		return (error);
+	}
+
+	fp = getf(zc->zc_cookie);
+	if (fp == NULL) {
+		dmu_objset_rele(fromsnap, FTAG);
+		dmu_objset_rele(tosnap, FTAG);
+		return (EBADF);
+	}
+
+	off = fp->f_offset;
+
+	error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off);
+
+	if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
+		fp->f_offset = off;
+	releasef(zc->zc_cookie);
+
+	dmu_objset_rele(fromsnap, FTAG);
+	dmu_objset_rele(tosnap, FTAG);
+	return (error);
+}
+
+/*
+ * Remove all ACL files in shares dir
+ */
+static int
+zfs_smb_acl_purge(znode_t *dzp)
+{
+	zap_cursor_t	zc;
+	zap_attribute_t	zap;
+	zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+	int error;
+
+	for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
+	    (error = zap_cursor_retrieve(&zc, &zap)) == 0;
+	    zap_cursor_advance(&zc)) {
+		if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
+		    NULL, 0)) != 0)
+			break;
+	}
+	zap_cursor_fini(&zc);
+	return (error);
+}
+
+static int
+zfs_ioc_smb_acl(zfs_cmd_t *zc)
+{
+	vnode_t *vp;
+	znode_t *dzp;
+	vnode_t *resourcevp = NULL;
+	znode_t *sharedir;
+	zfsvfs_t *zfsvfs;
+	nvlist_t *nvlist;
+	char *src, *target;
+	vattr_t vattr;
+	vsecattr_t vsec;
+	int error = 0;
+
+	if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
+	    NO_FOLLOW, NULL, &vp)) != 0)
+		return (error);
+
+	/* Now make sure mntpnt and dataset are ZFS */
+
+	if (vp->v_vfsp->vfs_fstype != zfsfstype ||
+	    (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
+	    zc->zc_name) != 0)) {
+		VN_RELE(vp);
+		return (EINVAL);
+	}
+
+	dzp = VTOZ(vp);
+	zfsvfs = dzp->z_zfsvfs;
+	ZFS_ENTER(zfsvfs);
+
+	/*
+	 * Create share dir if its missing.
+	 */
+	mutex_enter(&zfsvfs->z_lock);
+	if (zfsvfs->z_shares_dir == 0) {
+		dmu_tx_t *tx;
+
+		tx = dmu_tx_create(zfsvfs->z_os);
+		dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
+		    ZFS_SHARES_DIR);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			dmu_tx_abort(tx);
+		} else {
+			error = zfs_create_share_dir(zfsvfs, tx);
+			dmu_tx_commit(tx);
+		}
+		if (error) {
+			mutex_exit(&zfsvfs->z_lock);
+			VN_RELE(vp);
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+	mutex_exit(&zfsvfs->z_lock);
+
+	ASSERT(zfsvfs->z_shares_dir);
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
+		VN_RELE(vp);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	switch (zc->zc_cookie) {
+	case ZFS_SMB_ACL_ADD:
+		vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
+		vattr.va_type = VREG;
+		vattr.va_mode = S_IFREG|0777;
+		vattr.va_uid = 0;
+		vattr.va_gid = 0;
+
+		vsec.vsa_mask = VSA_ACE;
+		vsec.vsa_aclentp = &full_access;
+		vsec.vsa_aclentsz = sizeof (full_access);
+		vsec.vsa_aclcnt = 1;
+
+		error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
+		    &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
+		if (resourcevp)
+			VN_RELE(resourcevp);
+		break;
+
+	case ZFS_SMB_ACL_REMOVE:
+		error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
+		    NULL, 0);
+		break;
+
+	case ZFS_SMB_ACL_RENAME:
+		if ((error = get_nvlist(zc->zc_nvlist_src,
+		    zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
+			VN_RELE(vp);
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+		if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
+		    nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
+		    &target)) {
+			VN_RELE(vp);
+			VN_RELE(ZTOV(sharedir));
+			ZFS_EXIT(zfsvfs);
+			nvlist_free(nvlist);
+			return (error);
+		}
+		error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
+		    kcred, NULL, 0);
+		nvlist_free(nvlist);
+		break;
+
+	case ZFS_SMB_ACL_PURGE:
+		error = zfs_smb_acl_purge(sharedir);
+		break;
+
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	VN_RELE(vp);
+	VN_RELE(ZTOV(sharedir));
+
+	ZFS_EXIT(zfsvfs);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		short name of snap
+ * zc_string		user-supplied tag for this hold
+ * zc_cookie		recursive flag
+ * zc_temphold		set if hold is temporary
+ * zc_cleanup_fd	cleanup-on-exit file descriptor for calling process
+ * zc_sendobj		if non-zero, the objid for zc_name@zc_value
+ * zc_createtxg		if zc_sendobj is non-zero, snap must have zc_createtxg
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_hold(zfs_cmd_t *zc)
+{
+	boolean_t recursive = zc->zc_cookie;
+	spa_t *spa;
+	dsl_pool_t *dp;
+	dsl_dataset_t *ds;
+	int error;
+	minor_t minor = 0;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+
+	if (zc->zc_sendobj == 0) {
+		return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value,
+		    zc->zc_string, recursive, zc->zc_temphold,
+		    zc->zc_cleanup_fd));
+	}
+
+	if (recursive)
+		return (EINVAL);
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error)
+		return (error);
+
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
+	rw_exit(&dp->dp_config_rwlock);
+	spa_close(spa, FTAG);
+	if (error)
+		return (error);
+
+	/*
+	 * Until we have a hold on this snapshot, it's possible that
+	 * zc_sendobj could've been destroyed and reused as part
+	 * of a later txg.  Make sure we're looking at the right object.
+	 */
+	if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) {
+		dsl_dataset_rele(ds, FTAG);
+		return (ENOENT);
+	}
+
+	if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) {
+		error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
+		if (error) {
+			dsl_dataset_rele(ds, FTAG);
+			return (error);
+		}
+	}
+
+	error = dsl_dataset_user_hold_for_send(ds, zc->zc_string,
+	    zc->zc_temphold);
+	if (minor != 0) {
+		if (error == 0) {
+			dsl_register_onexit_hold_cleanup(ds, zc->zc_string,
+			    minor);
+		}
+		zfs_onexit_fd_rele(zc->zc_cleanup_fd);
+	}
+	dsl_dataset_rele(ds, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of dataset from which we're releasing a user hold
+ * zc_value	short name of snap
+ * zc_string	user-supplied tag for this hold
+ * zc_cookie	recursive flag
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_release(zfs_cmd_t *zc)
+{
+	boolean_t recursive = zc->zc_cookie;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+
+	return (dsl_dataset_user_release(zc->zc_name, zc->zc_value,
+	    zc->zc_string, recursive));
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ *
+ * outputs:
+ * zc_nvlist_src{_size}	nvlist of snapshot holds
+ */
+static int
+zfs_ioc_get_holds(zfs_cmd_t *zc)
+{
+	nvlist_t *nvp;
+	int error;
+
+	if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) {
+		error = put_nvlist(zc, nvp);
+		nvlist_free(nvp);
+	}
+
+	return (error);
+}
+
+/*
+ * pool create, destroy, and export don't log the history as part of
+ * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export
+ * do the logging of those commands.
+ */
+static zfs_ioc_vec_t zfs_ioc_vec[] = {
+	{ zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_destroy,	zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_configs,	zfs_secpolicy_none, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_scan, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE,
+	    POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_upgrade,	zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_set_state, zfs_secpolicy_config,	POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_setpath,	zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_setfru,	zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_objset_stats,	zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_rename, zfs_secpolicy_rename,	DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_inject_fault,	zfs_secpolicy_inject, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, DATASET_NAME,
+	    B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_obj_to_path, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_pool_set_props, zfs_secpolicy_config,	POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, DATASET_NAME,
+	    B_FALSE, POOL_CHECK_NONE },
+	{ zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, DATASET_NAME,
+	    B_FALSE, POOL_CHECK_NONE },
+	{ zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
+	    DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_next_obj, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_diff, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, DATASET_NAME,
+	    B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_obj_to_stats, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED }
+};
+
+int
+pool_status_check(const char *name, zfs_ioc_namecheck_t type,
+    zfs_ioc_poolcheck_t check)
+{
+	spa_t *spa;
+	int error;
+
+	ASSERT(type == POOL_NAME || type == DATASET_NAME);
+
+	if (check & POOL_CHECK_NONE)
+		return (0);
+
+	error = spa_open(name, &spa, FTAG);
+	if (error == 0) {
+		if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
+			error = EAGAIN;
+		else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
+			error = EROFS;
+		spa_close(spa, FTAG);
+	}
+	return (error);
+}
+
+/*
+ * Find a free minor number.
+ */
+minor_t
+zfsdev_minor_alloc(void)
+{
+	static minor_t last_minor;
+	minor_t m;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+
+	for (m = last_minor + 1; m != last_minor; m++) {
+		if (m > ZFSDEV_MAX_MINOR)
+			m = 1;
+		if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
+			last_minor = m;
+			return (m);
+		}
+	}
+
+	return (0);
+}
+
+static int
+zfs_ctldev_init(dev_t *devp)
+{
+	minor_t minor;
+	zfs_soft_state_t *zs;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+	ASSERT(getminor(*devp) == 0);
+
+	minor = zfsdev_minor_alloc();
+	if (minor == 0)
+		return (ENXIO);
+
+	if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
+		return (EAGAIN);
+
+	*devp = makedevice(getemajor(*devp), minor);
+
+	zs = ddi_get_soft_state(zfsdev_state, minor);
+	zs->zss_type = ZSST_CTLDEV;
+	zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
+
+	return (0);
+}
+
+static void
+zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
+{
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+
+	zfs_onexit_destroy(zo);
+	ddi_soft_state_free(zfsdev_state, minor);
+}
+
+void *
+zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
+{
+	zfs_soft_state_t *zp;
+
+	zp = ddi_get_soft_state(zfsdev_state, minor);
+	if (zp == NULL || zp->zss_type != which)
+		return (NULL);
+
+	return (zp->zss_data);
+}
+
+static int
+zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
+{
+	int error = 0;
+
+	if (getminor(*devp) != 0)
+		return (zvol_open(devp, flag, otyp, cr));
+
+	/* This is the control device. Allocate a new minor if requested. */
+	if (flag & FEXCL) {
+		mutex_enter(&zfsdev_state_lock);
+		error = zfs_ctldev_init(devp);
+		mutex_exit(&zfsdev_state_lock);
+	}
+
+	return (error);
+}
+
+static int
+zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
+{
+	zfs_onexit_t *zo;
+	minor_t minor = getminor(dev);
+
+	if (minor == 0)
+		return (0);
+
+	mutex_enter(&zfsdev_state_lock);
+	zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
+	if (zo == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (zvol_close(dev, flag, otyp, cr));
+	}
+	zfs_ctldev_destroy(zo, minor);
+	mutex_exit(&zfsdev_state_lock);
+
+	return (0);
+}
+
+static int
+zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
+{
+	zfs_cmd_t *zc;
+	uint_t vec;
+	int error, rc;
+	minor_t minor = getminor(dev);
+
+	if (minor != 0 &&
+	    zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
+		return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
+
+	vec = cmd - ZFS_IOC;
+	ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
+
+	if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
+		return (EINVAL);
+
+	zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+
+	error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
+	if (error != 0)
+		error = EFAULT;
+
+	if ((error == 0) && !(flag & FKIOCTL))
+		error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr);
+
+	/*
+	 * Ensure that all pool/dataset names are valid before we pass down to
+	 * the lower layers.
+	 */
+	if (error == 0) {
+		zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
+		zc->zc_iflags = flag & FKIOCTL;
+		switch (zfs_ioc_vec[vec].zvec_namecheck) {
+		case POOL_NAME:
+			if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
+				error = EINVAL;
+			error = pool_status_check(zc->zc_name,
+			    zfs_ioc_vec[vec].zvec_namecheck,
+			    zfs_ioc_vec[vec].zvec_pool_check);
+			break;
+
+		case DATASET_NAME:
+			if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
+				error = EINVAL;
+			error = pool_status_check(zc->zc_name,
+			    zfs_ioc_vec[vec].zvec_namecheck,
+			    zfs_ioc_vec[vec].zvec_pool_check);
+			break;
+
+		case NO_NAME:
+			break;
+		}
+	}
+
+	if (error == 0)
+		error = zfs_ioc_vec[vec].zvec_func(zc);
+
+	rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
+	if (error == 0) {
+		if (rc != 0)
+			error = EFAULT;
+		if (zfs_ioc_vec[vec].zvec_his_log)
+			zfs_log_history(zc);
+	}
+
+	kmem_free(zc, sizeof (zfs_cmd_t));
+	return (error);
+}
+
+static int
+zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
+{
+	if (cmd != DDI_ATTACH)
+		return (DDI_FAILURE);
+
+	if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
+	    DDI_PSEUDO, 0) == DDI_FAILURE)
+		return (DDI_FAILURE);
+
+	zfs_dip = dip;
+
+	ddi_report_dev(dip);
+
+	return (DDI_SUCCESS);
+}
+
+static int
+zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
+{
+	if (spa_busy() || zfs_busy() || zvol_busy())
+		return (DDI_FAILURE);
+
+	if (cmd != DDI_DETACH)
+		return (DDI_FAILURE);
+
+	zfs_dip = NULL;
+
+	ddi_prop_remove_all(dip);
+	ddi_remove_minor_node(dip, NULL);
+
+	return (DDI_SUCCESS);
+}
+
+/*ARGSUSED*/
+static int
+zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
+{
+	switch (infocmd) {
+	case DDI_INFO_DEVT2DEVINFO:
+		*result = zfs_dip;
+		return (DDI_SUCCESS);
+
+	case DDI_INFO_DEVT2INSTANCE:
+		*result = (void *)0;
+		return (DDI_SUCCESS);
+	}
+
+	return (DDI_FAILURE);
+}
+
+/*
+ * OK, so this is a little weird.
+ *
+ * /dev/zfs is the control node, i.e. minor 0.
+ * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
+ *
+ * /dev/zfs has basically nothing to do except serve up ioctls,
+ * so most of the standard driver entry points are in zvol.c.
+ */
+static struct cb_ops zfs_cb_ops = {
+	zfsdev_open,	/* open */
+	zfsdev_close,	/* close */
+	zvol_strategy,	/* strategy */
+	nodev,		/* print */
+	zvol_dump,	/* dump */
+	zvol_read,	/* read */
+	zvol_write,	/* write */
+	zfsdev_ioctl,	/* ioctl */
+	nodev,		/* devmap */
+	nodev,		/* mmap */
+	nodev,		/* segmap */
+	nochpoll,	/* poll */
+	ddi_prop_op,	/* prop_op */
+	NULL,		/* streamtab */
+	D_NEW | D_MP | D_64BIT,		/* Driver compatibility flag */
+	CB_REV,		/* version */
+	nodev,		/* async read */
+	nodev,		/* async write */
+};
+
+static struct dev_ops zfs_dev_ops = {
+	DEVO_REV,	/* version */
+	0,		/* refcnt */
+	zfs_info,	/* info */
+	nulldev,	/* identify */
+	nulldev,	/* probe */
+	zfs_attach,	/* attach */
+	zfs_detach,	/* detach */
+	nodev,		/* reset */
+	&zfs_cb_ops,	/* driver operations */
+	NULL,		/* no bus operations */
+	NULL,		/* power */
+	ddi_quiesce_not_needed,	/* quiesce */
+};
+
+static struct modldrv zfs_modldrv = {
+	&mod_driverops,
+	"ZFS storage pool",
+	&zfs_dev_ops
+};
+
+static struct modlinkage modlinkage = {
+	MODREV_1,
+	(void *)&zfs_modlfs,
+	(void *)&zfs_modldrv,
+	NULL
+};
+
+
+uint_t zfs_fsyncer_key;
+extern uint_t rrw_tsd_key;
+
+int
+_init(void)
+{
+	int error;
+
+	spa_init(FREAD | FWRITE);
+	zfs_init();
+	zvol_init();
+
+	if ((error = mod_install(&modlinkage)) != 0) {
+		zvol_fini();
+		zfs_fini();
+		spa_fini();
+		return (error);
+	}
+
+	tsd_create(&zfs_fsyncer_key, NULL);
+	tsd_create(&rrw_tsd_key, NULL);
+
+	error = ldi_ident_from_mod(&modlinkage, &zfs_li);
+	ASSERT(error == 0);
+	mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	return (0);
+}
+
+int
+_fini(void)
+{
+	int error;
+
+	if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
+		return (EBUSY);
+
+	if ((error = mod_remove(&modlinkage)) != 0)
+		return (error);
+
+	zvol_fini();
+	zfs_fini();
+	spa_fini();
+	if (zfs_nfsshare_inited)
+		(void) ddi_modclose(nfs_mod);
+	if (zfs_smbshare_inited)
+		(void) ddi_modclose(smbsrv_mod);
+	if (zfs_nfsshare_inited || zfs_smbshare_inited)
+		(void) ddi_modclose(sharefs_mod);
+
+	tsd_destroy(&zfs_fsyncer_key);
+	ldi_ident_release(zfs_li);
+	zfs_li = NULL;
+	mutex_destroy(&zfs_share_lock);
+
+	return (error);
+}
+
+int
+_info(struct modinfo *modinfop)
+{
+	return (mod_info(&modlinkage, modinfop));
+}