[RFC PATCH 09/14] KVM-test: Add a subtest of multicast

Amos Kong
2010-07-20T01:36:12Z

Use 'ping' to test send/recive multicat packets. Flood ping test is also added.
Limit guest network as 'bridge' mode, because multicast packets could not be
transmitted to guest when using 'user' network.
Add join_mcast.py for joining machine into multicast groups.

Signed-off-by: Amos Kong <akong@redhat.com>
---
0 files changed, 0 insertions(+), 0 deletions(-)

diff --git a/client/tests/kvm/scripts/join_mcast.py b/client/tests/kvm/scripts/join_mcast.py
new file mode 100755
index 0000000..0d90e5c
--- /dev/null
+++ b/client/tests/kvm/scripts/join_mcast.py
@@ -0,0 +1,29 @@
+import socket, struct, os, signal, sys
+# this script is used to join machine into multicast groups
+# author: Amos Kong <akong@redhat.com>
+
+if len(sys.argv) < 4:
+ print """%s [mgroup_count] [prefix] [suffix]
+ mgroup_count: count of multicast addresses
+ prefix: multicast address prefix
+ suffix: multicast address suffix""" % sys.argv[0]
+ sys.exit()
+
+mgroup_count = int(sys.argv[1])
+prefix = sys.argv[2]
+suffix = int(sys.argv[3])
+
+s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+for i in range(mgroup_count):
+ mcast = prefix + "." + str(suffix + i)
+ try:
+ mreq = struct.pack("4sl", socket.inet_aton(mcast), socket.INADDR_ANY)
+ s.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
+ except:
+ s.close()
+ print "Could not join multicast: %s" % mcast
+ raise
+
+print "join_mcast_pid:%s" % os.getpid()
+os.kill(os.getpid(), signal.SIGSTOP)
+s.close()
diff --git a/client/tests/kvm/tests/multicast.py b/client/tests/kvm/tests/multicast.py
new file mode 100644
index 0000000..6b0e106
--- /dev/null
+++ b/client/tests/kvm/tests/multicast.py
@@ -0,0 +1,67 @@
+import logging, commands, os, re
+from autotest_lib.client.common_lib import error
+import kvm_test_utils, kvm_net_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)))
+
+ # stop iptable/selinux on guest/host
+ cmd = "/etc/init.d/iptables stop && echo 0 > /selinux/enforce"
+ session.get_command_status(cmd)
+ commands.getoutput(cmd)
+ # make sure guest replies to broadcasts
+ session.get_command_status("echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore"
+ "_broadcasts && echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all")
+
+ # 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")
+ vm.copy_files_to(mcast_path, "/tmp")
+ 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.
+ if not re.findall("join_mcast_pid:(\d+)", output):
+ raise error.TestFail("Can't join multicast groups,output:%s" % output)
+ pid = output.split()[0]
+
+ 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_net_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_net_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_net_utils.ping(mcast, 10, interface=ifname, timeout=20)
+ if s != 0:
+ raise error.TestFail(" Ping return non-zero value %s" % o)
+ finally:
+ session.get_command_output("kill -s SIGCONT %s" % pid)
+ session.close()
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index 9e2b9a0..9594a38 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -374,6 +374,13 @@ variants:
type = nic_promisc
file_size = 1, 1460, 65000, 100000000

+ - multicast: install setup unattended_install.cdrom
+ type = multicast
+ nic_mode = tap
+ mcast = 225.0.0.1
+ mgroup_count = 20
+ flood_minutes = 1
+
- physical_resources_check: install setup unattended_install.cdrom
type = physical_resources_check
catch_uuid_cmd = dmidecode | awk -F: '/UUID/ {print $2}'
@@ -1050,7 +1057,7 @@ variants:

# Windows section
- @Windows:
- no autotest linux_s3 vlan_tag ioquit unattended_install.(url|nfs|remote_ks) jumbo file_transfer nicdriver_unload nic_promisc
+ no autotest linux_s3 vlan_tag ioquit unattended_install.(url|nfs|remote_ks) jumbo file_transfer nicdriver_unload nic_promisc multicast
shutdown_command = shutdown /s /f /t 0
reboot_command = shutdown /r /f /t 0
status_test_command = echo %errorlevel%