FreeBSD: Fix `zfs jail` and add a test

zfs_jail was not using zfs_ioctl so failed to map the IOC number
correctly.  Use zfs_ioctl to perform the jail ioctl and add a test 
case for FreeBSD.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10658

configure.ac

@@ -258,6 +258,7 @@ AC_CONFIG_FILES([
 	tests/zfs-tests/tests/functional/cli_root/zfs_get/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zfs_ids_to_path/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zfs_inherit/Makefile
+	tests/zfs-tests/tests/functional/cli_root/zfs_jail/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zfs_load-key/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zfs_mount/Makefile
 	tests/zfs-tests/tests/functional/cli_root/zfs_program/Makefile

lib/libzfs/os/freebsd/libzfs_compat.c

@@ -268,7 +268,7 @@ zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
 	zc.zc_zoneid = jailid;
 
 	cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
-	if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
+	if ((ret = zfs_ioctl(hdl, cmd, &zc)) != 0)
 		zfs_standard_error(hdl, errno, errbuf);
 
 	return (ret);

tests/runfiles/freebsd.run

@@ -1 +1,27 @@
-# don't delete this file
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+[DEFAULT]
+pre = setup
+quiet = False
+pre_user = root
+user = root
+timeout = 600
+post_user = root
+post = cleanup
+failsafe_user = root
+failsafe = callbacks/zfs_failsafe
+outputdir = /var/tmp/test_results
+tags = ['functional']
+
+[tests/functional/cli_root/zfs_jail:FreeBSD]
+tests = ['zfs_jail_001_pos']
+tags = ['functional', 'cli_root', 'zfs_jail']

tests/zfs-tests/include/commands.cfg

@@ -120,6 +120,9 @@ export SYSTEM_FILES_FREEBSD='chflags
     fsck
     getextattr
     gpart
+    jail
+    jexec
+    jls
     lsextattr
     md5
     mdconfig

tests/zfs-tests/tests/functional/cli_root/Makefile.am

@@ -15,6 +15,7 @@ SUBDIRS = \
 	zfs_get \
 	zfs_ids_to_path \
 	zfs_inherit \
+	zfs_jail \
 	zfs_load-key \
 	zfs_mount \
 	zfs_program \

tests/zfs-tests/tests/functional/cli_root/zfs_jail/Makefile.am

@@ -0,0 +1,6 @@
+pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/cli_root/zfs_jail
+dist_pkgdata_SCRIPTS = \
+	setup.ksh \
+	cleanup.ksh \
+	jail.conf \
+	zfs_jail_001_pos.ksh

tests/zfs-tests/tests/functional/cli_root/zfs_jail/cleanup.ksh

@@ -0,0 +1,30 @@
+#!/bin/ksh -p
+#
+# 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.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+default_cleanup

tests/zfs-tests/tests/functional/cli_root/zfs_jail/jail.conf

@@ -0,0 +1,9 @@
+testjail {
+	allow.mount.zfs;
+	allow.mount;
+	devfs_ruleset = 4;
+	enforce_statfs = 0;
+	mount.devfs;
+	path = "/";
+	persist;
+}

tests/zfs-tests/tests/functional/cli_root/zfs_jail/setup.ksh

@@ -0,0 +1,32 @@
+#!/bin/ksh -p
+#
+# 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.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+DISK=${DISKS%% *}
+
+default_setup $DISK

tests/zfs-tests/tests/functional/cli_root/zfs_jail/zfs_jail_001_pos.ksh

@@ -0,0 +1,84 @@
+#!/bin/ksh -p
+#
+# 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 2020 iXsystems, Inc.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+#
+# DESCRIPTION:
+# Test basic functionality of `zfs jail` and `zfs unjail`.
+#
+# STRATEGY:
+# 1. Create a jail.
+# 2. Perform some basic ZFS operations on a dataset both in the host and
+#    in the jail to confirm the dataset is functional in the host
+#    and hidden in in the jail.
+# 3. Run `zfs jail` to expose the dataset in the jail.
+# 4. Perform some basic ZFS operations on the dataset both in the host and
+#    in the jail to confirm the dataset is functional in the jail and host.
+# 5. Run `zfs unjail` to return the dataset to the host.
+# 6. Perform some basic ZFS operations on the dataset both in the host and
+#    in the jail to confirm the dataset is functional in the host
+#    and hidden in in the jail.
+#
+
+verify_runnable "global"
+
+JAIL="testjail"
+JAIL_CONF="$STF_SUITE/tests/functional/cli_root/zfs_jail/jail.conf"
+
+function cleanup
+{
+	if jls -j $JAIL name >/dev/null 2>&1; then
+		jail -r -f $JAIL_CONF $JAIL
+	fi
+}
+
+log_onexit cleanup
+
+log_assert "Verify that a dataset can be jailed and unjailed."
+
+# 1. Create a jail.
+log_must jail -c -f $JAIL_CONF $JAIL
+
+# 2. Try some basic ZFS operations.
+log_must zfs list $TESTPOOL
+log_mustnot jexec $JAIL zfs list $TESTPOOL
+
+# 3. Jail the dataset.
+log_must zfs jail $JAIL $TESTPOOL
+
+# 4. Try some basic ZFS operations.
+log_must zfs list $TESTPOOL
+log_must jexec $JAIL zfs list $TESTPOOL
+
+# 5. Unjail the dataset.
+log_must zfs unjail $JAIL $TESTPOOL
+
+# 6. Try some basic ZFS operations.
+log_must zfs list $TESTPOOL
+log_mustnot jexec $JAIL zfs list $TESTPOOL
+
+log_pass "Datasets can be jailed and unjailed."