test: add tests for renaming network interface

test/units/testsuite-17.12.sh

@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -ex
+set -o pipefail
+
+# shellcheck source=test/units/assert.sh
+. "$(dirname "$0")"/assert.sh
+
+create_link_file() {
+    name=${1?}
+
+    mkdir -p /run/systemd/network/
+    cat >/run/systemd/network/10-test.link <<EOF
+[Match]
+Kind=dummy
+MACAddress=00:50:56:c0:00:18
+
+[Link]
+Name=$name
+AlternativeName=test1 test2 test3 test4
+EOF
+    udevadm control --reload
+}
+
+udevadm control --log-level=debug
+
+create_link_file test1
+ip link add address 00:50:56:c0:00:18 type dummy
+udevadm wait --settle --timeout=30 /sys/class/net/test1
+output=$(ip link show dev test1)
+if ! [[ "$output" =~ altname ]]; then
+    echo "alternative name for network interface not supported, skipping test."
+    exit 0
+fi
+assert_not_in "altname test1" "$output"
+assert_in "altname test2" "$output"
+assert_in "altname test3" "$output"
+assert_in "altname test4" "$output"
+
+# By triggering add event, Name= and AlternativeNames= are re-applied
+create_link_file test2
+udevadm trigger --action add --settle /sys/class/net/test1
+udevadm wait --settle --timeout=30 /sys/class/net/test2
+output=$(ip link show dev test2)
+assert_in "altname test1" "$output"
+assert_not_in "altname test2" "$output"
+assert_in "altname test3" "$output"
+assert_in "altname test4" "$output"
+
+# Name= and AlternativeNames= are not applied on move event
+create_link_file test3
+udevadm trigger --action move --settle /sys/class/net/test2
+udevadm wait --settle --timeout=30 /sys/class/net/test2
+output=$(ip link show dev test2)
+assert_in "altname test1" "$output"
+assert_not_in "altname test2" "$output"
+assert_in "altname test3" "$output"
+assert_in "altname test4" "$output"
+
+# Test move event triggered by manual renaming
+ip link set dev test2 name hoge
+udevadm wait --settle --timeout=30 /sys/class/net/hoge
+output=$(ip link show dev hoge)
+assert_in "altname test1" "$output"
+assert_not_in "altname test2" "$output"
+assert_in "altname test3" "$output"
+assert_in "altname test4" "$output"
+assert_not_in "altname hoge" "$output"
+
+# Re-test add event
+udevadm trigger --action add --settle /sys/class/net/hoge
+udevadm wait --settle --timeout=30 /sys/class/net/test3
+output=$(ip link show dev test3)
+assert_in "altname test1" "$output"
+assert_in "altname test2" "$output"
+assert_not_in "altname test3" "$output"
+assert_in "altname test4" "$output"
+assert_not_in "altname hoge" "$output"
+
+# cleanup
+ip link del dev test3
+
+rm -f /run/systemd/network/10-test.link
+udevadm control --reload --log-level=info
+
+exit 0