Merge pull request #37 from ifupdown-ng/feature/unify-link-and-vlan-executors

unify link and vlan executors

.github/workflows/build.yml

@@ -15,5 +15,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Build and run tests
+      - name: Build
+        run: make
+
+      - name: Run tests
         run: make check

Makefile

@@ -111,7 +111,7 @@ clean:
 	rm -f ${MANPAGES}
 
 check: ${LIBIFUPDOWN_LIB} ${CMDS}
-	kyua test
+	kyua test || (kyua report --verbose && exit 1)
 
 install: all
 	install -D -m755 ${MULTICALL} ${DESTDIR}/sbin/${MULTICALL}

executor-scripts/linux/link

@@ -1,9 +1,63 @@
 #!/bin/sh
-[ -z "$VERBOSE" ] || set -x
-OPTIONS=""
+
+[ -n "$VERBOSE" ] && set -x
+
+IF_LINK_OPTIONS="$IF_LINK_OPTIONS"
+[ -n "$IF_MTU" ] && IF_LINK_OPTIONS="$IF_LINK_OPTIONS mtu $IF_MTU"
+
+is_vlan() {
+	case "$IFACE" in
+		*#*) return 1 ;;
+		*:*) return 1 ;;
+		vlan*.*) return 1 ;;
+		vlan*)
+			IF_VLAN_ID="${IFACE#vlan}"
+			[ -n "${IF_VLAN_RAW_DEVICE:-}" ] && return 0
+			return 1
+			;;
+		*.*)
+			IF_VLAN_RAW_DEVICE="${IFACE%.*}"
+			IF_VLAN_ID="${IFACE##*.}"
+			return 0
+			;;
+		*)
+			[ -z "${IF_VLAN_ID:-}" ] && return 1
+			[ -z "${IF_VLAN_RAW_DEVICE:-}" ] && return 1
+			return 0
+			;;
+	esac
+}
+
 case "$PHASE" in
 up|down)
-	[ -n "$IF_MTU" ] && OPTIONS="$OPTIONS mtu $IF_MTU"
-	${MOCK} ip link set $PHASE dev $IFACE $OPTIONS
+	if is_vlan; then
+		ADD_DEL="add"
+		[ "$PHASE" = "down" ] && ADD_DEL="delete"
+
+		if [ -e /sys/class/net/$IFACE ]; then
+			exit 0
+		fi
+
+		if [ -z "$MOCK" ]; then
+			if ! ip link show "$IF_VLAN_RAW_DEVICE" >/dev/null; then
+				echo "Device $IF_VLAN_RAW_DEVICE for $IFACE does not exist"
+				exit 1
+			fi
+		fi
+
+		if ! [ -d /proc/net/vlan ]; then
+			echo "Loading 8021q kernel module for VLAN support"
+			${MOCK} modprobe 8021q
+		fi
+
+		${MOCK} ip link $ADD_DEL link "$IF_VLAN_RAW_DEVICE" name "$IFACE" type vlan id "$IF_VLAN_ID"
+	else
+		${MOCK} ip link set $PHASE dev $IFACE $IF_LINK_OPTIONS
+	fi
+	;;
+depend)
+	if is_vlan; then
+		echo "$IF_VLAN_RAW_DEVICE"
+	fi
 	;;
 esac

executor-scripts/stub/vlan

@@ -1,7 +0,0 @@
-#!/bin/sh
-case "$PHASE" in
-depend)
-	RAW_DEVICE="${IFACE%.*}"
-	echo "$RAW_DEVICE"
-	;;
-esac

libifupdown/interface.c

@@ -63,7 +63,11 @@ lif_interface_init(struct lif_interface *interface, const char *ifname)
 
 	interface->ifname = strdup(ifname);
 
-	lif_interface_use_executor(interface, strchr(ifname, '.') == NULL ? "link" : "vlan");
+	lif_interface_use_executor(interface, "link");
+
+	/* keep the 'vlan' executor as a config hint for backwards compatibility */
+	if (strchr(ifname, '.') != NULL)
+		lif_interface_use_executor(interface, "vlan");
 }
 
 bool

tests/fixtures/vlan-named.interfaces

@@ -0,0 +1,4 @@
+iface servers
+	vlan-raw-device eth0
+	vlan-id 8
+	address 2001:db8:1000:2::2/64

tests/ifquery_test

@@ -30,7 +30,9 @@ tests_init \
 	tunnel_legacy_rewrite \
 	tunnel_ifupdown2_dependency \
 	tunnel_ifupdown2_rewrite \
-	gre_dependency
+	gre_dependency \
+	vlan_explicit_learned_dependency \
+	vlan_guessed_learned_dependency
 
 noargs_body() {
 	atf_check -s exit:1 -e ignore ifquery -S/dev/null
@@ -192,3 +194,15 @@ gre_dependency_body() {
 	atf_check -s exit:0 -o match:"requires eth0" \
 		ifquery -E $EXECUTORS_LINUX -i $FIXTURES/gre.interfaces tun0
 }
+
+vlan_explicit_learned_dependency_body() {
+	atf_check -s exit:0 -o match:"requires eth0" \
+		-o match:"use vlan" \
+		ifquery -E $EXECUTORS_LINUX -i $FIXTURES/vlan-named.interfaces servers
+}
+
+vlan_guessed_learned_dependency_body() {
+	atf_check -s exit:0 -o match:"requires eth0" \
+		-o match:"use vlan" \
+		ifquery -E $EXECUTORS_LINUX -i $FIXTURES/vlan.interfaces eth0.8
+}

tests/linux/link_test

@@ -3,7 +3,16 @@
 . $(atf_get_srcdir)/../test_env.sh
 EXECUTOR="$(atf_get_srcdir)/../../executor-scripts/linux/link"
 
-tests_init up down mtu
+tests_init \
+	up \
+	down \
+	mtu \
+	vlan_explicit_up \
+	vlan_explicit_down \
+	vlan_guessed_up \
+	vlan_guessed_down \
+	vlan_explicit_depend \
+	vlan_guessed_depend
 
 up_body() {
 	export IFACE=lo PHASE=up MOCK=echo
@@ -22,3 +31,42 @@ mtu_body() {
 	atf_check -s exit:0 -o match:'ip link set up dev eth0 mtu 1492' \
 		${EXECUTOR}
 }
+
+vlan_explicit_up_body() {
+	export IFACE=servers PHASE=up MOCK=echo \
+		IF_VLAN_RAW_DEVICE="eth0" IF_VLAN_ID="123"
+	atf_check -s exit:0 -o match:'ip link add link eth0 name servers type vlan id 123' \
+		${EXECUTOR}
+}
+
+vlan_explicit_down_body() {
+	export IFACE=servers PHASE=down MOCK=echo \
+		IF_VLAN_RAW_DEVICE="eth0" IF_VLAN_ID="123"
+	atf_check -s exit:0 -o match:'ip link delete link eth0 name servers type vlan id 123' \
+		${EXECUTOR}
+}
+
+vlan_guessed_up_body() {
+	export IFACE=eth0.8 PHASE=up MOCK=echo
+	atf_check -s exit:0 -o match:'ip link add link eth0 name eth0.8 type vlan id 8' \
+		${EXECUTOR}
+}
+
+vlan_guessed_down_body() {
+	export IFACE=eth0.8 PHASE=down MOCK=echo
+	atf_check -s exit:0 -o match:'ip link delete link eth0 name eth0.8 type vlan id 8' \
+		${EXECUTOR}
+}
+
+vlan_explicit_depend_body() {
+	export IFACE=servers PHASE=up MOCK=echo \
+		IF_VLAN_RAW_DEVICE="eth0" IF_VLAN_ID="123"
+	atf_check -s exit:0 -o match:'eth0' \
+		${EXECUTOR}
+}
+
+vlan_guessed_depend_body() {
+	export IFACE=eth0.8 PHASE=depend
+	atf_check -s exit:0 -o match:'eth0' \
+		${EXECUTOR}
+}