According to different nic model set different MTU for it. And ping from
guest to host, to see whether tested size can be received by host.
Changes from v3:
- The arp entry should be set with the bridge name, not
the tap interface name
Changes from v2:
- Coding style fixes
Changes from v1:
- Make standard of lost ratio can be configured
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Amos Kong <akong@xxxxxxxxxx>
---
client/tests/kvm/tests/jumbo.py | 136 ++++++++++++++++++++++++++++++++
client/tests/kvm/tests_base.cfg.sample | 11 +++-
2 files changed, 146 insertions(+), 1 deletions(-)
create mode 100644 client/tests/kvm/tests/jumbo.py
diff --git a/client/tests/kvm/tests/jumbo.py b/client/tests/kvm/tests/jumbo.py
new file mode 100644
index 0000000..5114c20
--- /dev/null
+++ b/client/tests/kvm/tests/jumbo.py
@@ -0,0 +1,136 @@
+import logging, commands, random
+from autotest_lib.client.common_lib import error
+from autotest_lib.client.bin import utils
+import kvm_test_utils, kvm_utils
+
+def run_jumbo(test, params, env):
+ """
+ Test the RX jumbo frame function of vnics:
+
+ 1) Boot the VM.
+ 2) Change the MTU of guest nics and host taps depending on the NIC model.
+ 3) Add the static ARP entry for guest NIC.
+ 4) Wait for the MTU ok.
+ 5) Verify the path MTU using ping.
+ 6) Ping the guest with large frames.
+ 7) Increment size ping.
+ 8) Flood ping the guest with large frames.
+ 9) Verify the path MTU.
+ 10) Recover the MTU.
+
+ @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)
+ mtu = params.get("mtu", "1500")
+ bridge = params.get("bridge", "")
+ if not bridge:
+ logging.warning('Bridge not defined on the config file, '
+ 'trying to locate one with brctl...')
+ bridge_cmd = "/usr/sbin/brctl show | awk 'NR==2 { print $1 }'"
+ bridge = utils.system_output(bridge_cmd).strip()
+ flood_time = params.get("flood_time", "300")
+ max_icmp_pkt_size = int(mtu) - 28
+
+ ifname = vm.get_ifname(0)
+ ip = vm.get_address(0)
+ if ip is None:
+ raise error.TestError("Could not get the IP address")
+
+ try:
+ # Environment preparation
+ ethname = kvm_test_utils.get_linux_ifname(session, vm.get_mac_address(0))
+
+ logging.info("Changing the MTU of guest ...")
+ guest_mtu_cmd = "ifconfig %s mtu %s" % (ethname , mtu)
+ s, o = session.get_command_status_output(guest_mtu_cmd)
+ if s != 0:
+ logging.error(o)
+ raise error.TestError("Fail to set the MTU of guest NIC: %s" %
+ ethname)
+
+ logging.info("Chaning the MTU of host tap ...")
+ host_mtu_cmd = "ifconfig %s mtu %s" % (ifname, mtu)
+ utils.run(host_mtu_cmd)
+
+ logging.info("Add a temporary static ARP entry ...")
+ arp_add_cmd = "arp -s %s %s -i %s" % (ip, vm.get_mac_address(0), bridge)
+ utils.run(arp_add_cmd)
+
+ def is_mtu_ok():
+ s, o = kvm_test_utils.ping(ip, 1, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ hint="do", timeout=2)
+ return s == 0
+
+ def verify_mtu():
+ logging.info("Verify the path MTU")
+ s, o = kvm_test_utils.ping(ip, 10, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ hint="do", timeout=15)
+ if s != 0 :
+ logging.error(o)
+ raise error.TestFail("Path MTU is not as expected")
+ if kvm_test_utils.get_loss_ratio(o) != 0:
+ logging.error(o)
+ raise error.TestFail("Packet loss ratio during MTU "
+ "verification is not zero")
+
+ def flood_ping():
+ logging.info("Flood with large frames")
+ kvm_test_utils.ping(ip, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ flood=True, timeout=float(flood_time))
+
+ def large_frame_ping(count=100):
+ logging.info("Large frame ping")
+ s, o = kvm_test_utils.ping(ip, count, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ timeout=float(count) * 2)
+ ratio = kvm_test_utils.get_loss_ratio(o)
+ if ratio != 0:
+ raise error.TestFail("Loss ratio of large frame ping is %s" %
+ ratio)
+
+ def size_increase_ping(step=random.randrange(90, 110)):
+ logging.info("Size increase ping")
+ for size in range(0, max_icmp_pkt_size + 1, step):
+ logging.info("Ping %s with size %s" % (ip, size))
+ s, o = kvm_test_utils.ping(ip, 1, interface=ifname,
+ packetsize=size,
+ hint="do", timeout=1)
+ if s != 0:
+ s, o = kvm_test_utils.ping(ip, 10, interface=ifname,
+ packetsize=size,
+ adaptive=True, hint="do",
+ timeout=20)
+
+ if kvm_test_utils.get_loss_ratio(o) > int(params.get(
+ "fail_ratio", 50)):
+ raise error.TestFail("Ping loss ratio is greater "
+ "than 50% for size %s" % size)
+
+ logging.info("Waiting for the MTU to be OK")
+ wait_mtu_ok = 10
+ if not kvm_utils.wait_for(is_mtu_ok, wait_mtu_ok, 0, 1):
+ logging.debug(commands.getoutput("ifconfig -a"))
+ raise error.TestError("MTU is not as expected even after %s "
+ "seconds" % wait_mtu_ok)
+
+ # Functional Test
+ verify_mtu()
+ large_frame_ping()
+ size_increase_ping()
+
+ # Stress test
+ flood_ping()
+ verify_mtu()
+
+ finally:
+ # Environment clean
+ session.close()
+ logging.info("Removing the temporary ARP entry")
+ utils.run("arp -d %s -i %s" % (ip, bridge))
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index c195d1c..cf1deaf 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -473,6 +473,9 @@ variants:
counts = 100
flood_minutes = 10
+ - jumbo: install setup unattended_install.cdrom
+ type = jumbo
+
- physical_resources_check: install setup unattended_install.cdrom
type = physical_resources_check
catch_uuid_cmd = dmidecode | awk -F: '/UUID/ {print $2}'
@@ -623,10 +626,16 @@ variants:
variants:
- @rtl8139:
nic_model = rtl8139
+ jumbo:
+ mtu = 1500
- e1000:
nic_model = e1000
+ jumbo:
+ mtu = 16110
- virtio_net:
nic_model = virtio
+ jumbo:
+ mtu = 65520
# Guests
@@ -1241,7 +1250,7 @@ variants:
# Windows section
- @Windows:
- no autotest linux_s3 vlan_tag ioquit unattended_install.(url|nfs|remote_ks)
+ no autotest linux_s3 vlan_tag ioquit unattended_install.(url|nfs|remote_ks) jumbo
shutdown_command = shutdown /s /f /t 0
reboot_command = shutdown /r /f /t 0
status_test_command = echo %errorlevel%
--
1.7.1
--
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