Merge remote branch 'cros/upstream' into tempbranch

client/tests/kvm/tests/multicast.py

Index: client/tests/kvm/tests/multicast.py
diff --git a/client/tests/kvm/tests/multicast.py b/client/tests/kvm/tests/multicast.py
new file mode 100644
index 0000000000000000000000000000000000000000..a47779a78279117e1d4e43647e6e86df90a9820d
--- /dev/null
+++ b/client/tests/kvm/tests/multicast.py
@@ -0,0 +1,91 @@
+import logging, os, re
+from autotest_lib.client.common_lib import error
+from autotest_lib.client.bin import utils
+import kvm_test_utils
+
+
+def run_multicast(test, params, env):
+    """
+    Test multicast function of nic (rtl8139/e1000/virtio)
+
+    1) Create a VM.
+    2) Join guest into multicast groups.
+    3) Ping multicast addresses on host.
+    4) Flood ping test with different size of packets.
+    5) Final ping test and check if lose packet.
+
+    @param test: KVM test object.
+    @param params: Dictionary with the test parameters.
+    @param env: Dictionary with test environment.
+    """
+    vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
+    session = kvm_test_utils.wait_for_login(vm,
+                                  timeout=int(params.get("login_timeout", 360)))
+
+    def run_guest(cmd):
+        s, o = session.get_command_status_output(cmd)
+        if s:
+            logging.warning('Command %s executed in guest returned exit code '
+                            '%s, output: %s', cmd, s, o.strip())
+
+    def run_host_guest(cmd):
+        run_guest(cmd)
+        utils.system(cmd, ignore_status=True)
+
+    # flush the firewall rules
+    cmd_flush = "iptables -F"
+    cmd_selinux = ("if [ -e /selinux/enforce ]; then setenforce 0; "
+                   "else echo 'no /selinux/enforce file present'; fi")
+    run_host_guest(cmd_flush)
+    run_host_guest(cmd_selinux)
+    # make sure guest replies to broadcasts
+    cmd_broadcast = "echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts"
+    cmd_broadcast_2 = "echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all"
+    run_guest(cmd_broadcast)
+    run_guest(cmd_broadcast_2)
+
+    # base multicast address
+    mcast = params.get("mcast", "225.0.0.1")
+    # count of multicast addresses, less than 20
+    mgroup_count = int(params.get("mgroup_count", 5))
+    flood_minutes = float(params.get("flood_minutes", 10))
+    ifname = vm.get_ifname()
+    prefix = re.findall("\d+.\d+.\d+", mcast)[0]
+    suffix = int(re.findall("\d+", mcast)[-1])
+    # copy python script to guest for joining guest to multicast groups
+    mcast_path = os.path.join(test.bindir, "scripts/join_mcast.py")
+    if not vm.copy_files_to(mcast_path, "/tmp"):
+        raise error.TestError("Fail to copy %s to guest" % mcast_path)
+    output = session.get_command_output("python /tmp/join_mcast.py %d %s %d" %
+                                        (mgroup_count, prefix, suffix))
+
+    # if success to join multicast, the process will be paused, and return PID.
+    try:
+        pid = re.findall("join_mcast_pid:(\d+)", output)[0]
+    except IndexError:
+        raise error.TestFail("Can't join multicast groups,output:%s" % output)
+
+    try:
+        for i in range(mgroup_count):
+            new_suffix = suffix + i
+            mcast = "%s.%d" % (prefix, new_suffix)
+
+            logging.info("Initial ping test, mcast: %s", mcast)
+            s, o = kvm_test_utils.ping(mcast, 10, interface=ifname, timeout=20)
+            if s != 0:
+                raise error.TestFail(" Ping return non-zero value %s" % o)
+
+            logging.info("Flood ping test, mcast: %s", mcast)
+            kvm_test_utils.ping(mcast, None, interface=ifname, flood=True,
+                                output_func=None, timeout=flood_minutes*60)
+
+            logging.info("Final ping test, mcast: %s", mcast)
+            s, o = kvm_test_utils.ping(mcast, 10, interface=ifname, timeout=20)
+            if s != 0:
+                raise error.TestFail("Ping failed, status: %s, output: %s" %
+                                     (s, o))
+
+    finally:
+        logging.debug(session.get_command_output("ipmaddr show"))
+        session.get_command_output("kill -s SIGCONT %s" % pid)
+        session.close()