Add a simple smoke test for a connected USB NIC

We assume the system has a network interface connected via USB, and will
bring it up, configure it and do a simple ping test to a host.

USB_ETH_PING_PEER the host to ping, defaults to openqa.oqa.prg2.suse.org

tests/kernel/usb_nic.pm

@@ -0,0 +1,46 @@
+# SUSE's openQA tests
+#
+# Copyright SUSE LLC
+# SPDX-License-Identifier: FSFAP
+
+# Package: usb_nic
+# Summary: Simple smoke test for testing USB NIC connected to system
+# Maintainer: LSG QE Kernel <[email protected]>
+
+use base 'opensusebasetest';
+use strict;
+use warnings;
+use testapi;
+use serial_terminal 'select_serial_terminal';
+use utils;
+use Utils::Logging 'export_logs_basic';
+
+sub run {
+    my ($self) = @_;
+
+    select_serial_terminal;
+
+    zypper_call('in -t package ethtool');
+
+    my $ping_peer = get_var('USB_ETH_PING_PEER', 'openqa.oqa.prg2.suse.org');
+    my $interface = script_output 'basename $(readlink /sys/class/net/* | grep usb )';
+
+    assert_script_run "echo \"BOOTPROTO='dhcp'\" > /etc/sysconfig/network/ifcfg-$interface";
+    assert_script_run "echo \"STARTMODE='auto'\" >> /etc/sysconfig/network/ifcfg-$interface";
+
+    assert_script_run "ifup $interface";
+
+    # wait until interface is up
+    while (1) {
+        sleep(3);
+        last if script_output "ip -4 addr show $interface | grep -oP \'(?<=inet\\s)\\d+(\\.\\d+){3}\'" ne "";
+    }
+
+    assert_script_run("ping -I $interface -c 4 $ping_peer");
+}
+
+sub test_flags {
+    return {fatal => 0};
+}
+
+1;