Index: projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/Makefile
===================================================================
--- projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/Makefile	(revision 292296)
+++ projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/Makefile	(revision 292297)
@@ -1,17 +1,18 @@
 # $FreeBSD$
 
 .include <bsd.own.mk>
 
 TESTSDIR=${TESTSBASE}/sys/cddl/zfs/tests/cli_root/zpool_destroy
 FILESDIR=${TESTSDIR}
 
 ATF_TESTS_KSH93+=	zpool_destroy_test
 
 FILES+=	cleanup.ksh
 
 FILES+=	zpool_destroy.cfg
 FILES+=	zpool_destroy_001_pos.ksh
 FILES+=	zpool_destroy_002_pos.ksh
 FILES+=	zpool_destroy_003_neg.ksh
+FILES+=	zpool_destroy_004_pos.ksh
 
 .include <bsd.test.mk>
Index: projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/zpool_destroy_004_pos.ksh
===================================================================
--- projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/zpool_destroy_004_pos.ksh	(nonexistent)
+++ projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/zpool_destroy_004_pos.ksh	(revision 292297)
@@ -0,0 +1,119 @@
+#!/usr/local/bin/ksh93 -p
+#
+# Copyright 2015 Spectra Logic Corporation.
+#
+
+. $STF_SUITE/include/libtest.kshlib
+
+################################################################################
+#
+# __stc_assertion_start
+#
+# ID: zpool_destroy_004_pos
+#
+# DESCRIPTION: 
+#	'zpool destroy -f <pool>' can forcibly destroy the specified pool,
+#       even if that pool has running zfs send or receive activity.
+#
+# STRATEGY:
+#	1. Create a storage pool
+#       2. For each sleep time in a set:
+#       2a. For each destroy type (same pool, sender only, receiver only):
+#	    - Create a dataset with some amount of data
+#           - Run zfs send | zfs receive in the background.
+#           - Sleep the amount of time specified for this run.
+#	    - 'zpool destroy -f' the pool.
+#	    - Wait for the send|receive to exit.  It must not be killed in
+#	      order to ensure that the destroy takes care of doing so.
+#	    - Verify the pool destroyed successfully
+#
+# __stc_assertion_end
+#
+###############################################################################
+
+verify_runnable "global"
+
+function cleanup
+{
+	poolexists $TESTPOOL && destroy_pool $TESTPOOL
+	poolexists $TESTPOOL1 && destroy_pool $TESTPOOL1
+}
+
+function create_sender
+{
+	cleanup
+	create_pool "$TESTPOOL" "$DISK0"
+	log_must $ZFS create $TESTPOOL/$TESTFS
+	log_must $MKDIR -p $TESTDIR
+	log_must $ZFS set mountpoint=$TESTDIR $TESTPOOL/$TESTFS
+	log_must dd if=/dev/zero of=$TESTDIR/f0 bs=1024k count=$datasz
+	log_must $ZFS snapshot $TESTPOOL/$TESTFS@snap1
+}
+
+function create_sender_and_receiver
+{
+	create_sender
+	create_pool "$TESTPOOL1" "$DISK1"
+}
+
+function send_recv_destroy
+{
+	sleeptime=$1
+	recv=$2
+	to_destroy=$3
+
+	( $ZFS send -RP $TESTPOOL/$TESTFS@s0 | $ZFS receive -Fu $recv/d1 ) &
+	sendrecvpid=$!
+
+	log_must sleep $sleeptime
+	destroy_start=$(date '+%s')
+	log_must $ZPOOL destroy -f $to_destroy
+	destroy_end=$(date '+%s')
+	dtime=$(expr ${destroy_end} - ${destroy_start})
+	log_note "Destroy took ${dtime} seconds."
+
+	log_note "If this wait returns 0, it means send or receive succeeded."
+	log_mustnot wait $sendrecvpid
+	wait_end=$(date '+%s')
+	wtime=$(expr ${wait_end} - ${destroy_end})
+	log_note "send|receive took ${wtime} seconds to finish."
+
+	log_mustnot $ZPOOL list $to_destroy
+}
+
+function run_tests
+{
+	log_note "TEST: send|receive to the same pool"
+	create_sender
+	send_recv_destroy $sleeptime $TESTPOOL $TESTPOOL
+
+	log_note "TEST: send|receive to different pools, destroy sender"
+	create_sender_and_receiver
+	send_recv_destroy $sleeptime $TESTPOOL1 $TESTPOOL
+
+	log_note "TEST: send|receive to different pools, destroy receiver"
+	create_sender_and_receiver
+	send_recv_destroy $sleeptime $TESTPOOL1 $TESTPOOL1
+}
+
+log_assert "'zpool destroy -f <pool>' can force destroy active pool"
+log_onexit cleanup
+set_disks
+
+# Faster tests using 1GB data size
+datasz=1000
+log_note "Running fast tests with 1000MB of data"
+for sleeptime in 0.1 0.3 0.5 0.75 1 2 3; do
+	run_tests
+done
+
+# A longer test that simulates a more realistic send|receive that exceeds
+# the size of physical memory by 1/3 and gets interrupted a decent amount of
+# time after the start of the run.
+physmem=$(sysctl -n hw.physmem)
+datasz=$(expr ${physmem} / 1048576 \* 4 / 3)
+log_note "Running longer test with ${datasz}MB of data"
+sleeptime=15
+run_tests
+
+log_pass "'zpool destroy -f <pool>' successful with active pools."
Index: projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/zpool_destroy_test.sh
===================================================================
--- projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/zpool_destroy_test.sh	(revision 292296)
+++ projects/zfsd/head/tests/sys/cddl/zfs/tests/cli_root/zpool_destroy/zpool_destroy_test.sh	(revision 292297)
@@ -1,107 +1,134 @@
 # 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 2012 Spectra Logic.  All rights reserved.
 # Use is subject to license terms.
 #
 
 
 atf_test_case zpool_destroy_001_pos cleanup
 zpool_destroy_001_pos_head()
 {
 	atf_set "descr" "'zpool destroy <pool>' can destroy a specified pool."
 	atf_set "require.config"  disks_are_physical
 	atf_set "require.progs"  zfs zpool
 }
 zpool_destroy_001_pos_body()
 {
 	atf_expect_fail 'BUG26166 cannot create pools on zvols'
 	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
 	. $(atf_get_srcdir)/../../../include/default.cfg
 	. $(atf_get_srcdir)/zpool_destroy.cfg
 
 	ksh93 $(atf_get_srcdir)/zpool_destroy_001_pos.ksh || atf_fail "Testcase failed"
 }
 zpool_destroy_001_pos_cleanup()
 {
 	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
 	. $(atf_get_srcdir)/../../../include/default.cfg
 	. $(atf_get_srcdir)/zpool_destroy.cfg
 
 	ksh93 $(atf_get_srcdir)/cleanup.ksh || atf_fail "Cleanup failed"
 }
 
 
 atf_test_case zpool_destroy_002_pos cleanup
 zpool_destroy_002_pos_head()
 {
 	atf_set "descr" "'zpool destroy -f <pool>' can forcely destroy the specified pool"
 	atf_set "require.progs"  zfs zpool
 }
 zpool_destroy_002_pos_body()
 {
 	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
 	. $(atf_get_srcdir)/../../../include/default.cfg
 	. $(atf_get_srcdir)/zpool_destroy.cfg
 
 	ksh93 $(atf_get_srcdir)/zpool_destroy_002_pos.ksh || atf_fail "Testcase failed"
 }
 zpool_destroy_002_pos_cleanup()
 {
 	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
 	. $(atf_get_srcdir)/../../../include/default.cfg
 	. $(atf_get_srcdir)/zpool_destroy.cfg
 
 	ksh93 $(atf_get_srcdir)/cleanup.ksh || atf_fail "Cleanup failed"
 }
 
 
 atf_test_case zpool_destroy_003_neg cleanup
 zpool_destroy_003_neg_head()
 {
 	atf_set "descr" "'zpool destroy' should return an error with badly-formed parameters."
 	atf_set "require.progs"  zpool
 }
 zpool_destroy_003_neg_body()
 {
 	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
 	. $(atf_get_srcdir)/../../../include/default.cfg
 	. $(atf_get_srcdir)/zpool_destroy.cfg
 
 	ksh93 $(atf_get_srcdir)/zpool_destroy_003_neg.ksh || atf_fail "Testcase failed"
 }
 zpool_destroy_003_neg_cleanup()
 {
 	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
 	. $(atf_get_srcdir)/../../../include/default.cfg
 	. $(atf_get_srcdir)/zpool_destroy.cfg
 
 	ksh93 $(atf_get_srcdir)/cleanup.ksh || atf_fail "Cleanup failed"
 }
 
 
+atf_test_case zpool_destroy_004_pos cleanup
+zpool_destroy_004_pos_head()
+{
+	atf_set "descr" "'zpool destroy -f' should work on active pools."
+	atf_set "require.progs" zfs zpool
+	atf_set "require.config" at_least_2_disks
+	atf_set "timeout" 2000
+}
+zpool_destroy_004_pos_body()
+{
+	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
+	. $(atf_get_srcdir)/../../../include/default.cfg
+	. $(atf_get_srcdir)/zpool_destroy.cfg
+
+	ksh93 $(atf_get_srcdir)/zpool_destroy_004_pos.ksh || atf_fail "Testcase failed"
+}
+zpool_destroy_004_pos_cleanup()
+{
+	export TESTCASE_ID=$(echo $(atf_get ident) | cksum -o 2 | cut -f 1 -d " ")
+	. $(atf_get_srcdir)/../../../include/default.cfg
+	. $(atf_get_srcdir)/zpool_destroy.cfg
+
+	ksh93 $(atf_get_srcdir)/cleanup.ksh || atf_fail "Cleanup failed"
+}
+
+
 atf_init_test_cases()
 {
 
 	atf_add_test_case zpool_destroy_001_pos
 	atf_add_test_case zpool_destroy_002_pos
 	atf_add_test_case zpool_destroy_003_neg
+	atf_add_test_case zpool_destroy_004_pos
 }