Add tests for forcibly unmount filesystem while receiving stream.

Signed-off-by: Mariusz Zaborski <oshogbo@vexillium.org>

tests/runfiles/common.run

@@ -229,8 +229,8 @@ tags = ['functional', 'cli_root', 'zfs_rollback']
 [tests/functional/cli_root/zfs_send]
 tests = ['zfs_send_001_pos', 'zfs_send_002_pos', 'zfs_send_003_pos',
     'zfs_send_004_neg', 'zfs_send_005_pos', 'zfs_send_006_pos',
-    'zfs_send_007_pos', 'zfs_send_encrypted', 'zfs_send_raw',
-    'zfs_send_sparse', 'zfs_send-b']
+    'zfs_send_007_pos', 'zfs_send_008', 'zfs_send_encrypted',
+    'zfs_send_raw', 'zfs_send_sparse', 'zfs_send-b']
 tags = ['functional', 'cli_root', 'zfs_send']
 
 [tests/functional/cli_root/zfs_set]

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

@@ -9,6 +9,7 @@ dist_pkgdata_SCRIPTS = \
 	zfs_send_005_pos.ksh \
 	zfs_send_006_pos.ksh \
 	zfs_send_007_pos.ksh \
+	zfs_send_008.ksh \
 	zfs_send_encrypted.ksh \
 	zfs_send_raw.ksh \
 	zfs_send_sparse.ksh \

tests/zfs-tests/tests/functional/cli_root/zfs_send/zfs_send_008.ksh

@@ -0,0 +1,102 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# 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.
+#
+# CDDL HEADER END
+#
+# Copyright (c) 2020 by Mariusz Zaborski <oshogbo@FreeBSD.org>.
+
+#
+# DESCRIPTION:
+# Verify 'zfs recv' can forcibly unmount filesystem while receiving
+# stream.
+#
+# STRATEGY:
+# 1. Create snapshot of file system
+# 2. Make a zfs filesystem mountpoint busy
+# 3. Recife filesystem with force flag.
+# 4. Verify that stream was received or failed on Linux.
+#
+
+. $STF_SUITE/tests/functional/cli_root/cli_common.kshlib
+. $STF_SUITE/tests/functional/cli_root/zfs_send/zfs_send.cfg
+
+verify_runnable "both"
+
+function cleanup
+{
+	for snap in $init_snap $inc_snap $rst_snap $rst_inc_snap; do
+                snapexists $snap && \
+                        log_must zfs destroy -f $snap
+        done
+
+	datasetexists $rst_root && \
+		log_must zfs destroy -Rf $rst_root
+
+	for file in $full_bkup $inc_bkup \
+			$init_data $inc_data
+	do
+		[[ -e $file ]] && \
+			log_must rm -f $file
+	done
+
+	[[ -d $TESTDIR1 ]] && \
+		log_must rm -rf $TESTDIR1
+
+	cd $curpath
+}
+
+log_assert "Verify 'zfs recv' can forcibly unmount busy filesystem."
+log_onexit cleanup
+
+curpath=`dirname $0`
+init_snap=$TESTPOOL/$TESTFS@init_snap
+inc_snap=$TESTPOOL/$TESTFS@inc_snap
+full_bkup=$TEST_BASE_DIR/fullbkup.$$
+inc_bkup=$TEST_BASE_DIR/incbkup.$$
+init_data=$TESTDIR/$TESTFILE1
+inc_data=$TESTDIR/$TESTFILE2
+orig_sum=""
+rst_sum=""
+rst_root=$TESTPOOL/rst_ctr
+rst_snap=$rst_root/$TESTFS@init_snap
+rst_inc_snap=$rst_root/$TESTFS@inc_snap
+rst_data=$TESTDIR1/$TESTFS/$TESTFILE1
+rst_inc_data=$TESTDIR1/$TESTFS/$TESTFILE2
+
+log_note "Verify 'zfs recv' can forcible unmount busy filesystem."
+
+#Pre-paration
+log_must zfs create $rst_root
+[[ ! -d $TESTDIR1 ]] && \
+	log_must mkdir -p $TESTDIR1
+log_must zfs set mountpoint=$TESTDIR1 $rst_root
+
+file_write -o create -f $init_data -b $BLOCK_SIZE -c $WRITE_COUNT
+
+log_must zfs snapshot $init_snap
+zfs send $init_snap > $full_bkup
+(( $? != 0 )) && \
+	log_fail "'zfs send' fails to create full send"
+
+log_note "Verify the send stream is valid to receive."
+
+cd $TESTDIR1
+if is_linux; then
+    log_mustnot zfs receive -M $rst_snap <$full_bkup
+else
+    log_must zfs receive -M $rst_snap <$full_bkup
+    receive_check $rst_snap ${rst_snap%%@*}
+    compare_cksum $init_data $rst_data
+fi
+
+log_pass "The busy filesystem was unmounted or busy as expected."