zfs: add ztest to the kyua test suite.

This program is currently failing, and has been for >6 months on HEAD.
Ideally, this should be run 24x7 in CI, to discover hard-to-find bugs that
only manifest with concurrent i/o.

Requested by:	lwhsu, mmacy

cddl/usr.bin/ztest/Makefile

@@ -25,4 +25,7 @@ CSTD=	c99
 # it without debugging.
 CFLAGS+= -g -DDEBUG=1 -Wno-format
 
+HAS_TESTS=
+SUBDIR.${MK_TESTS}+= tests
+
 .include <bsd.prog.mk>

cddl/usr.bin/ztest/tests/Makefile

@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+.include <bsd.own.mk>
+
+ATF_TESTS_SH+= ztest
+
+.include <bsd.test.mk>

cddl/usr.bin/ztest/tests/ztest.sh

@@ -0,0 +1,52 @@
+#
+# Test Case: ztest
+# $FreeBSD$
+#
+atf_test_case ztest
+ztest_head()
+{
+	atf_set "descr" "Run ztest"
+	atf_set "timeout" 900
+	atf_set "require.config" "rt_long"
+}
+
+ztest_body()
+{
+	ARGS="-VVVVV -f ${TMPDIR:-/tmp}"
+	if atf_config_has ztest_extra_args; then
+		ARGS="${ARGS} $(atf_config_get ztest_extra_args)"
+	fi
+	ztest ${ARGS}
+	if [ $? != 0 ]; then
+		echo "failing"
+		save_ztest_artifacts
+		atf_fail "Testcase failed"
+	else
+		echo "passing"
+		atf_pass
+	fi
+}
+
+#
+# ATF Test Program Init Function
+#
+atf_init_test_cases()
+{
+	atf_add_test_case ztest
+}
+
+save_ztest_artifacts()
+{
+	# If artifacts_dir is defined, save test artifacts for
+	# post-mortem analysis
+	if atf_config_has artifacts_dir; then
+		TC_ARTIFACTS_DIR=`atf_config_get artifacts_dir`/cddl/usr.bin/ztest/$(atf_get ident)
+		mkdir -p $TC_ARTIFACTS_DIR
+		TC_CORE_DIR=/var/crash
+		if atf_config_has core_dir; then
+			TC_CORE_DIR=`atf_config_get core_dir`
+		fi
+		mv *ztest*.core* $TC_ARTIFACTS_DIR || true
+		mv ${TC_CORE_DIR}/*ztest*.core* $TC_ARTIFACTS_DIR || true
+	fi
+}

etc/mtree/BSD.tests.dist

@@ -67,6 +67,8 @@
         usr.bin
             ctfconvert
             ..
+            ztest
+            ..
         ..
         usr.sbin
             dtrace