Please welcome ZFS - The last word in file systems.

ZFS file system was ported from OpenSolaris operating system. The code in under
CDDL license.

I'd like to thank all SUN developers that created this great piece of software.

Supported by:	Wheel LTD (http://www.wheel.pl/)
Supported by:	The FreeBSD Foundation (http://www.freebsdfoundation.org/)
Supported by:	Sentex (http://www.sentex.net/)

1 files changed, 657 insertions, 0 deletions

diff --git a/sys/contrib/opensolaris/common/zfs/zfs_prop.c b/sys/contrib/opensolaris/common/zfs/zfs_prop.c
new file mode 100644
index 0000000..7125619
--- /dev/null
+++ b/sys/contrib/opensolaris/common/zfs/zfs_prop.c
@@ -0,0 +1,657 @@
+/*
+ * 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 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * Master property table.
+ *
+ * This table keeps track of all the properties supported by ZFS, and their
+ * various attributes.  Not all of these are needed by the kernel, and several
+ * are only used by a single libzfs client.  But having them here centralizes
+ * all property information in one location.
+ *
+ * 	name		The human-readable string representing this property
+ * 	proptype	Basic type (string, boolean, number)
+ * 	default		Default value for the property.  Sadly, C only allows
+ * 			you to initialize the first member of a union, so we
+ * 			have two default members for each property.
+ * 	attr		Attributes (readonly, inheritable) for the property
+ * 	types		Valid dataset types to which this applies
+ * 	values		String describing acceptable values for the property
+ * 	colname		The column header for 'zfs list'
+ *	colfmt		The column formatting for 'zfs list'
+ *
+ * This table must match the order of property types in libzfs.h.
+ */
+
+#include <sys/zio.h>
+#include <sys/spa.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+
+#include "zfs_prop.h"
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#else
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#endif
+
+typedef enum {
+	prop_default,
+	prop_readonly,
+	prop_inherit
+} prop_attr_t;
+
+typedef struct {
+	const char	*pd_name;
+	zfs_proptype_t	pd_proptype;
+	uint64_t	pd_numdefault;
+	const char	*pd_strdefault;
+	prop_attr_t	pd_attr;
+	int		pd_types;
+	const char	*pd_values;
+	const char	*pd_colname;
+	boolean_t	pd_rightalign;
+	boolean_t	pd_visible;
+} prop_desc_t;
+
+static prop_desc_t zfs_prop_table[] = {
+	{ "type",	prop_type_string,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY, "filesystem | volume | snapshot", "TYPE", B_TRUE,
+	    B_TRUE },
+	{ "creation",	prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY, "<date>", "CREATION", B_FALSE, B_TRUE },
+	{ "used",	prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY, "<size>",	"USED", B_TRUE, B_TRUE },
+	{ "available",	prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "AVAIL", B_TRUE,
+	    B_TRUE },
+	{ "referenced",	prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY,
+	    "<size>", "REFER", B_TRUE, B_TRUE },
+	{ "compressratio", prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY, "<1.00x or higher if compressed>", "RATIO", B_TRUE,
+	    B_TRUE },
+	{ "mounted",	prop_type_boolean,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_FILESYSTEM, "yes | no | -", "MOUNTED", B_TRUE, B_TRUE },
+	{ "origin",	prop_type_string,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<snapshot>", "ORIGIN",
+	    B_FALSE, B_TRUE },
+	{ "quota",	prop_type_number,	0,	NULL,	prop_default,
+	    ZFS_TYPE_FILESYSTEM, "<size> | none", "QUOTA", B_TRUE, B_TRUE },
+	{ "reservation", prop_type_number,	0,	NULL,	prop_default,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "<size> | none", "RESERV", B_TRUE, B_TRUE },
+	{ "volsize",	prop_type_number,	0,	NULL,	prop_default,
+	    ZFS_TYPE_VOLUME, "<size>", "VOLSIZE", B_TRUE, B_TRUE },
+	{ "volblocksize", prop_type_number,	8192,	NULL,	prop_readonly,
+	    ZFS_TYPE_VOLUME, "512 to 128k, power of 2",	"VOLBLOCK", B_TRUE,
+	    B_TRUE },
+	{ "recordsize",	prop_type_number,	SPA_MAXBLOCKSIZE,	NULL,
+	    prop_inherit,
+	    ZFS_TYPE_FILESYSTEM,
+	    "512 to 128k, power of 2", "RECSIZE", B_TRUE, B_TRUE },
+	{ "mountpoint",	prop_type_string,	0,	"/",	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM,
+	    "<path> | legacy | none", "MOUNTPOINT", B_FALSE, B_TRUE },
+	{ "sharenfs",	prop_type_string,	0,	"off",	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM,
+	    "on | off | exports(5) options", "SHARENFS", B_FALSE, B_TRUE },
+	{ "checksum",	prop_type_index,	ZIO_CHECKSUM_DEFAULT,	"on",
+	    prop_inherit,	ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "on | off | fletcher2 | fletcher4 | sha256", "CHECKSUM", B_TRUE,
+	    B_TRUE },
+	{ "compression", prop_type_index,	ZIO_COMPRESS_DEFAULT,	"off",
+	    prop_inherit,	ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "on | off | lzjb | gzip | gzip-[1-9]", "COMPRESS", B_TRUE, B_TRUE },
+	{ "atime",	prop_type_boolean,	1,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM,
+	    "on | off", "ATIME", B_TRUE, B_TRUE },
+	{ "devices",	prop_type_boolean,	1,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
+	    "on | off", "DEVICES", B_TRUE, B_TRUE },
+	{ "exec",	prop_type_boolean,	1,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
+	    "on | off", "EXEC", B_TRUE, B_TRUE },
+	{ "setuid",	prop_type_boolean,	1,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "SETUID",
+	    B_TRUE, B_TRUE },
+	{ "readonly",	prop_type_boolean,	0,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "on | off", "RDONLY", B_TRUE, B_TRUE },
+	{ "jailed",	prop_type_boolean,	0,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM,
+	    "on | off", "JAILED", B_TRUE, B_TRUE },
+	{ "snapdir",	prop_type_index,	ZFS_SNAPDIR_HIDDEN, "hidden",
+	    prop_inherit,
+	    ZFS_TYPE_FILESYSTEM,
+	    "hidden | visible", "SNAPDIR", B_TRUE, B_TRUE },
+	{ "aclmode", prop_type_index,	ZFS_ACL_GROUPMASK, "groupmask",
+	    prop_inherit, ZFS_TYPE_FILESYSTEM,
+	    "discard | groupmask | passthrough", "ACLMODE", B_TRUE, B_TRUE },
+	{ "aclinherit", prop_type_index,	ZFS_ACL_SECURE,	"secure",
+	    prop_inherit, ZFS_TYPE_FILESYSTEM,
+	    "discard | noallow | secure | passthrough", "ACLINHERIT", B_TRUE,
+	    B_TRUE },
+	{ "createtxg",	prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY, NULL, NULL, B_FALSE, B_FALSE },
+	{ "name",	prop_type_string,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_ANY, NULL, "NAME", B_FALSE, B_FALSE },
+	{ "canmount",	prop_type_boolean,	1,	NULL,	prop_default,
+	    ZFS_TYPE_FILESYSTEM,
+	    "on | off", "CANMOUNT", B_TRUE, B_TRUE },
+	{ "shareiscsi",	prop_type_string,	0,	"off",	prop_inherit,
+	    ZFS_TYPE_ANY,
+	    "on | off | type=<type>", "SHAREISCSI", B_FALSE, B_TRUE },
+	{ "iscsioptions", prop_type_string,	0,	NULL,	prop_inherit,
+	    ZFS_TYPE_VOLUME, NULL, "ISCSIOPTIONS", B_FALSE, B_FALSE },
+	{ "xattr",	prop_type_boolean,	1,	NULL,	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
+	    "on | off", "XATTR", B_TRUE, B_TRUE },
+	{ "numclones", prop_type_number,	0,	NULL,	prop_readonly,
+	    ZFS_TYPE_SNAPSHOT, NULL, NULL, B_FALSE, B_FALSE },
+	{ "copies",	prop_type_index,	1,	"1",	prop_inherit,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "1 | 2 | 3", "COPIES", B_TRUE, B_TRUE },
+	{ "bootfs", prop_type_string,	0,	NULL,	prop_default,
+	    ZFS_TYPE_POOL, "<filesystem>", "BOOTFS", B_FALSE, B_TRUE },
+};
+
+#define	ZFS_PROP_COUNT	((sizeof (zfs_prop_table))/(sizeof (prop_desc_t)))
+
+/*
+ * Returns TRUE if the property applies to the given dataset types.
+ */
+int
+zfs_prop_valid_for_type(zfs_prop_t prop, int types)
+{
+	return ((zfs_prop_table[prop].pd_types & types) != 0);
+}
+
+/*
+ * Determine if the specified property is visible or not.
+ */
+boolean_t
+zfs_prop_is_visible(zfs_prop_t prop)
+{
+	if (prop < 0)
+		return (B_FALSE);
+
+	return (zfs_prop_table[prop].pd_visible);
+}
+
+/*
+ * Iterate over all properties, calling back into the specified function
+ * for each property. We will continue to iterate until we either
+ * reach the end or the callback function something other than
+ * ZFS_PROP_CONT.
+ */
+zfs_prop_t
+zfs_prop_iter_common(zfs_prop_f func, void *cb, zfs_type_t type,
+    boolean_t show_all)
+{
+	int i;
+
+	for (i = 0; i < ZFS_PROP_COUNT; i++) {
+		if (zfs_prop_valid_for_type(i, type) &&
+		    (zfs_prop_is_visible(i) || show_all)) {
+			if (func(i, cb) != ZFS_PROP_CONT)
+				return (i);
+		}
+	}
+	return (ZFS_PROP_CONT);
+}
+
+zfs_prop_t
+zfs_prop_iter(zfs_prop_f func, void *cb, boolean_t show_all)
+{
+	return (zfs_prop_iter_common(func, cb, ZFS_TYPE_ANY, show_all));
+}
+
+zpool_prop_t
+zpool_prop_iter(zpool_prop_f func, void *cb, boolean_t show_all)
+{
+	return (zfs_prop_iter_common(func, cb, ZFS_TYPE_POOL, show_all));
+}
+
+zfs_proptype_t
+zfs_prop_get_type(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_proptype);
+}
+
+static boolean_t
+propname_match(const char *p, zfs_prop_t prop, size_t len)
+{
+	const char *propname = zfs_prop_table[prop].pd_name;
+#ifndef _KERNEL
+	const char *colname = zfs_prop_table[prop].pd_colname;
+	int c;
+#endif
+
+#ifndef _KERNEL
+	if (colname == NULL)
+		return (B_FALSE);
+#endif
+
+	if (len == strlen(propname) &&
+	    strncmp(p, propname, len) == 0)
+		return (B_TRUE);
+
+#ifndef _KERNEL
+	if (len != strlen(colname))
+		return (B_FALSE);
+
+	for (c = 0; c < len; c++)
+		if (p[c] != tolower(colname[c]))
+			break;
+
+	return (colname[c] == '\0');
+#else
+	return (B_FALSE);
+#endif
+}
+
+zfs_prop_t
+zfs_name_to_prop_cb(zfs_prop_t prop, void *cb_data)
+{
+	const char *propname = cb_data;
+
+	if (propname_match(propname, prop, strlen(propname)))
+		return (prop);
+
+	return (ZFS_PROP_CONT);
+}
+
+/*
+ * Given a property name and its type, returns the corresponding property ID.
+ */
+zfs_prop_t
+zfs_name_to_prop_common(const char *propname, zfs_type_t type)
+{
+	zfs_prop_t prop;
+
+	prop = zfs_prop_iter_common(zfs_name_to_prop_cb, (void *)propname,
+	    type, B_TRUE);
+	return (prop == ZFS_PROP_CONT ? ZFS_PROP_INVAL : prop);
+}
+
+/*
+ * Given a zfs dataset property name, returns the corresponding property ID.
+ */
+zfs_prop_t
+zfs_name_to_prop(const char *propname)
+{
+	return (zfs_name_to_prop_common(propname, ZFS_TYPE_ANY));
+}
+
+/*
+ * Given a pool property name, returns the corresponding property ID.
+ */
+zpool_prop_t
+zpool_name_to_prop(const char *propname)
+{
+	return (zfs_name_to_prop_common(propname, ZFS_TYPE_POOL));
+}
+
+/*
+ * For user property names, we allow all lowercase alphanumeric characters, plus
+ * a few useful punctuation characters.
+ */
+static int
+valid_char(char c)
+{
+	return ((c >= 'a' && c <= 'z') ||
+	    (c >= '0' && c <= '9') ||
+	    c == '-' || c == '_' || c == '.' || c == ':');
+}
+
+/*
+ * Returns true if this is a valid user-defined property (one with a ':').
+ */
+boolean_t
+zfs_prop_user(const char *name)
+{
+	int i;
+	char c;
+	boolean_t foundsep = B_FALSE;
+
+	for (i = 0; i < strlen(name); i++) {
+		c = name[i];
+		if (!valid_char(c))
+			return (B_FALSE);
+		if (c == ':')
+			foundsep = B_TRUE;
+	}
+
+	if (!foundsep)
+		return (B_FALSE);
+
+	return (B_TRUE);
+}
+
+/*
+ * Return the default value for the given property.
+ */
+const char *
+zfs_prop_default_string(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_strdefault);
+}
+
+uint64_t
+zfs_prop_default_numeric(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_numdefault);
+}
+
+/*
+ * Returns TRUE if the property is readonly.
+ */
+int
+zfs_prop_readonly(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_attr == prop_readonly);
+}
+
+/*
+ * Given a dataset property ID, returns the corresponding name.
+ * Assuming the zfs dataset propety ID is valid.
+ */
+const char *
+zfs_prop_to_name(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_name);
+}
+
+/*
+ * Given a pool property ID, returns the corresponding name.
+ * Assuming the pool propety ID is valid.
+ */
+const char *
+zpool_prop_to_name(zpool_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_name);
+}
+
+/*
+ * Returns TRUE if the property is inheritable.
+ */
+int
+zfs_prop_inheritable(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_attr == prop_inherit);
+}
+
+typedef struct zfs_index {
+	const char *name;
+	uint64_t index;
+} zfs_index_t;
+
+static zfs_index_t checksum_table[] = {
+	{ "on",		ZIO_CHECKSUM_ON },
+	{ "off",	ZIO_CHECKSUM_OFF },
+	{ "fletcher2",	ZIO_CHECKSUM_FLETCHER_2 },
+	{ "fletcher4",	ZIO_CHECKSUM_FLETCHER_4 },
+	{ "sha256",	ZIO_CHECKSUM_SHA256 },
+	{ NULL }
+};
+
+static zfs_index_t compress_table[] = {
+	{ "on",		ZIO_COMPRESS_ON },
+	{ "off",	ZIO_COMPRESS_OFF },
+	{ "lzjb",	ZIO_COMPRESS_LZJB },
+	{ "gzip",	ZIO_COMPRESS_GZIP_6 },	/* the default gzip level */
+	{ "gzip-1",	ZIO_COMPRESS_GZIP_1 },
+	{ "gzip-2",	ZIO_COMPRESS_GZIP_2 },
+	{ "gzip-3",	ZIO_COMPRESS_GZIP_3 },
+	{ "gzip-4",	ZIO_COMPRESS_GZIP_4 },
+	{ "gzip-5",	ZIO_COMPRESS_GZIP_5 },
+	{ "gzip-6",	ZIO_COMPRESS_GZIP_6 },
+	{ "gzip-7",	ZIO_COMPRESS_GZIP_7 },
+	{ "gzip-8",	ZIO_COMPRESS_GZIP_8 },
+	{ "gzip-9",	ZIO_COMPRESS_GZIP_9 },
+	{ NULL }
+};
+
+static zfs_index_t snapdir_table[] = {
+	{ "hidden",	ZFS_SNAPDIR_HIDDEN },
+	{ "visible",	ZFS_SNAPDIR_VISIBLE },
+	{ NULL }
+};
+
+static zfs_index_t acl_mode_table[] = {
+	{ "discard",	ZFS_ACL_DISCARD },
+	{ "groupmask",	ZFS_ACL_GROUPMASK },
+	{ "passthrough", ZFS_ACL_PASSTHROUGH },
+	{ NULL }
+};
+
+static zfs_index_t acl_inherit_table[] = {
+	{ "discard",	ZFS_ACL_DISCARD },
+	{ "noallow",	ZFS_ACL_NOALLOW },
+	{ "secure",	ZFS_ACL_SECURE },
+	{ "passthrough", ZFS_ACL_PASSTHROUGH },
+	{ NULL }
+};
+
+static zfs_index_t copies_table[] = {
+	{ "1",	1 },
+	{ "2",	2 },
+	{ "3",	3 },
+	{ NULL }
+};
+
+static zfs_index_t *
+zfs_prop_index_table(zfs_prop_t prop)
+{
+	switch (prop) {
+	case ZFS_PROP_CHECKSUM:
+		return (checksum_table);
+	case ZFS_PROP_COMPRESSION:
+		return (compress_table);
+	case ZFS_PROP_SNAPDIR:
+		return (snapdir_table);
+	case ZFS_PROP_ACLMODE:
+		return (acl_mode_table);
+	case ZFS_PROP_ACLINHERIT:
+		return (acl_inherit_table);
+	case ZFS_PROP_COPIES:
+		return (copies_table);
+	default:
+		return (NULL);
+	}
+}
+
+
+/*
+ * Tables of index types, plus functions to convert between the user view
+ * (strings) and internal representation (uint64_t).
+ */
+int
+zfs_prop_string_to_index(zfs_prop_t prop, const char *string, uint64_t *index)
+{
+	zfs_index_t *table;
+	int i;
+
+	if ((table = zfs_prop_index_table(prop)) == NULL)
+		return (-1);
+
+	for (i = 0; table[i].name != NULL; i++) {
+		if (strcmp(string, table[i].name) == 0) {
+			*index = table[i].index;
+			return (0);
+		}
+	}
+
+	return (-1);
+}
+
+int
+zfs_prop_index_to_string(zfs_prop_t prop, uint64_t index, const char **string)
+{
+	zfs_index_t *table;
+	int i;
+
+	if ((table = zfs_prop_index_table(prop)) == NULL)
+		return (-1);
+
+	for (i = 0; table[i].name != NULL; i++) {
+		if (table[i].index == index) {
+			*string = table[i].name;
+			return (0);
+		}
+	}
+
+	return (-1);
+}
+
+#ifndef _KERNEL
+
+/*
+ * Returns a string describing the set of acceptable values for the given
+ * zfs property, or NULL if it cannot be set.
+ */
+const char *
+zfs_prop_values(zfs_prop_t prop)
+{
+	if (zfs_prop_table[prop].pd_types == ZFS_TYPE_POOL)
+		return (NULL);
+
+	return (zfs_prop_table[prop].pd_values);
+}
+
+/*
+ * Returns a string describing the set of acceptable values for the given
+ * zpool property, or NULL if it cannot be set.
+ */
+const char *
+zpool_prop_values(zfs_prop_t prop)
+{
+	if (zfs_prop_table[prop].pd_types != ZFS_TYPE_POOL)
+		return (NULL);
+
+	return (zfs_prop_table[prop].pd_values);
+}
+
+/*
+ * Returns TRUE if this property is a string type.  Note that index types
+ * (compression, checksum) are treated as strings in userland, even though they
+ * are stored numerically on disk.
+ */
+int
+zfs_prop_is_string(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_proptype == prop_type_string ||
+	    zfs_prop_table[prop].pd_proptype == prop_type_index);
+}
+
+/*
+ * Returns the column header for the given property.  Used only in
+ * 'zfs list -o', but centralized here with the other property information.
+ */
+const char *
+zfs_prop_column_name(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_colname);
+}
+
+/*
+ * Returns whether the given property should be displayed right-justified for
+ * 'zfs list'.
+ */
+boolean_t
+zfs_prop_align_right(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_rightalign);
+}
+
+/*
+ * Determines the minimum width for the column, and indicates whether it's fixed
+ * or not.  Only string columns are non-fixed.
+ */
+size_t
+zfs_prop_width(zfs_prop_t prop, boolean_t *fixed)
+{
+	prop_desc_t *pd = &zfs_prop_table[prop];
+	zfs_index_t *idx;
+	size_t ret;
+	int i;
+
+	*fixed = B_TRUE;
+
+	/*
+	 * Start with the width of the column name.
+	 */
+	ret = strlen(pd->pd_colname);
+
+	/*
+	 * For fixed-width values, make sure the width is large enough to hold
+	 * any possible value.
+	 */
+	switch (pd->pd_proptype) {
+	case prop_type_number:
+		/*
+		 * The maximum length of a human-readable number is 5 characters
+		 * ("20.4M", for example).
+		 */
+		if (ret < 5)
+			ret = 5;
+		/*
+		 * 'creation' is handled specially because it's a number
+		 * internally, but displayed as a date string.
+		 */
+		if (prop == ZFS_PROP_CREATION)
+			*fixed = B_FALSE;
+		break;
+	case prop_type_boolean:
+		/*
+		 * The maximum length of a boolean value is 3 characters, for
+		 * "off".
+		 */
+		if (ret < 3)
+			ret = 3;
+		break;
+	case prop_type_index:
+		idx = zfs_prop_index_table(prop);
+		for (i = 0; idx[i].name != NULL; i++) {
+			if (strlen(idx[i].name) > ret)
+				ret = strlen(idx[i].name);
+		}
+		break;
+
+	case prop_type_string:
+		*fixed = B_FALSE;
+		break;
+	}
+
+	return (ret);
+}
+
+#endif