Add network case of update-device:coalesce

- VIRT-294752 - [update-device][coalesce] Live update coalesce
settings for network and bridge type interface

Signed-off-by: Haijiao Zhao <[email protected]>

libvirt/tests/cfg/virtual_network/update_device/update_device_coalesce.cfg

@@ -0,0 +1,35 @@
+- virtual_network.update_device.coalesce:
+    type = update_device_coalesce
+    host_iface =
+    start_vm = no
+    timeout = 240
+    outside_ip = 'www.redhat.com'
+    extra_attrs = {}
+    vm_ping_outside = pass
+    variants:
+        - delete_iface_coalesce:
+            rx_frames = 32
+            coalesce = {'coalesce': {'max': '${rx_frames}'}}
+        - add_iface_coalesce:
+            coalesce = {}
+            updated_rx_frames = 64
+            updated_coalesce = {'coalesce': {'max': '${updated_rx_frames}'}}
+        - update_iface_coalesce:
+            rx_frames = 64
+            coalesce = {'coalesce': {'max': '${rx_frames}'}}
+            updated_rx_frames = 32
+            updated_coalesce = {'coalesce': {'max': '${updated_rx_frames}'}}
+    variants:
+        - nat_net:
+            iface_type = network
+            iface_source = {'source': {'network': 'default'}}
+        - linux_br:
+            iface_type = bridge
+            br_type = linux_br
+            iface_source = {'source': {'bridge': br_name}}
+        - ovs_br:
+            iface_type = bridge
+            br_type = ovs_br
+            iface_source = {'source': {'bridge': br_name}}
+            extra_attrs = {'virtualport': {'type': 'openvswitch'}}
+    iface_attrs = {'type_name': '${iface_type}', **${coalesce}, **${iface_source}, 'model': 'virtio', 'mac_address': mac, **${extra_attrs}}

libvirt/tests/src/virtual_network/update_device/unsupported_live_update.py

@@ -48,7 +48,7 @@ def run(test, params, env):
         vm.start()
         vm.wait_for_serial_login().close()
 
-        iface = network_base.get_iface_xml_inst(vmxml, 'on VM')
+        iface = network_base.get_iface_xml_inst(vm_name, 'on VM')
         iface_original = iface.copy()
         if del_attr:
             if del_attr == 'boot':
@@ -64,7 +64,7 @@ def run(test, params, env):
         if err_msg:
             libvirt.check_result(up_result, err_msg)
 
-        iface_update = network_base.get_iface_xml_inst(vmxml,
+        iface_update = network_base.get_iface_xml_inst(vm_name,
                                                        'after update-device')
         if iface_update != iface_original:
             test.fail(f'Interface xml changed after unsuccessful update.\n'

libvirt/tests/src/virtual_network/update_device/update_device_coalesce.py

@@ -0,0 +1,108 @@
+import logging
+
+from avocado.utils import process
+from virttest import utils_misc
+from virttest import utils_net
+from virttest import virsh
+from virttest.libvirt_xml import vm_xml
+from virttest.utils_libvirt import libvirt_vmxml
+from virttest.utils_test import libvirt
+
+from provider.virtual_network import network_base
+
+VIRSH_ARGS = {'ignore_status': False, 'debug': True}
+
+LOG = logging.getLogger('avocado.' + __name__)
+
+
+def check_coalesce_rx_frames(tap_device, rx_frames, test):
+    """
+    Check whether coalesce rx-frames meets expectation
+
+    :param tap_device: tap device to be checked
+    :param rx_frames: expected rx-frames
+    :param test: test instance
+    """
+    coal_params = network_base.get_ethtool_coalesce(tap_device)
+    LOG.debug(f'coalesce parameters from ethtool: {coal_params}')
+    coal_rx_frames = coal_params.get('rx-frames')
+    if coal_rx_frames != rx_frames:
+        test.fail(f'rx-frames of {tap_device} should be {rx_frames}, '
+                  f'not {coal_rx_frames}')
+
+
+def run(test, params, env):
+    """
+    Test update-device command to update coalesce of interface
+    """
+    vm_name = params.get('main_vm')
+    vm = env.get_vm(vm_name)
+    rand_id = utils_misc.generate_random_string(3)
+    br_type = params.get('br_type', '')
+    br_name = br_type + '_' + rand_id
+    mac = utils_net.generate_mac_address_simple()
+    iface_attrs = eval(params.get('iface_attrs', '{}'))
+    host_iface = params.get('host_iface')
+    host_iface = host_iface if host_iface else utils_net.get_net_if(
+        state='UP')[0]
+    rx_frames = params.get('rx_frames', '0')
+    updated_rx_frames = params.get('updated_rx_frames', '0')
+    updated_coalesce = eval(params.get('updated_coalesce', '{}'))
+
+    vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
+    bkxml = vmxml.copy()
+
+    try:
+        LOG.info('Create bridge for test.')
+        if br_type == 'linux_br':
+            utils_net.create_linux_bridge_tmux(br_name, host_iface)
+            process.run(f'ip l show type bridge {br_name}', shell=True)
+        elif br_type == 'ovs_br':
+            utils_net.create_ovs_bridge(br_name)
+
+        LOG.info('Setup interface on vm.')
+        vmxml.del_device('interface', by_tag=True)
+        libvirt_vmxml.modify_vm_device(vmxml, 'interface', iface_attrs)
+        LOG.debug(f'VMXML of {vm_name}:\n{virsh.dumpxml(vm_name).stdout_text}')
+
+        vm.start()
+        session = vm.wait_for_serial_login()
+
+        LOG.info('Check the rx-frames value for the tap device on the host.')
+        iflist = libvirt.get_interface_details(vm_name)
+        tap_device = iflist[0]['interface']
+        check_coalesce_rx_frames(tap_device, rx_frames, test)
+
+        LOG.info('Prepare interface xml to be updated with.')
+        iface = network_base.get_iface_xml_inst(vm_name, 'on VM')
+        if not updated_coalesce:
+            iface.del_coalesce()
+        else:
+            iface.setup_attrs(**updated_coalesce)
+
+        virsh.update_device(vm_name, iface.xml, **VIRSH_ARGS)
+
+        LOG.info('Check the live xml is updated.')
+        iface_update = network_base.get_iface_xml_inst(
+            vm_name, 'after update-device')
+        expect_coalesce = updated_coalesce.get('coalesce')
+        network_base.check_iface_attrs(iface_update, 'coalesce',
+                                       expect_coalesce)
+
+        LOG.info('Check the rx-frames value for the tap device on the host.')
+        check_coalesce_rx_frames(tap_device, updated_rx_frames, test)
+
+        LOG.info('Login vm to check whether the network works well via ping.')
+        ips = {'outside_ip': params.get('outside_ip')}
+        network_base.ping_check(params, ips, session, force_ipv4=True)
+
+    finally:
+        if 'session' in locals():
+            session.close()
+        bkxml.sync()
+        if br_type == 'linux_br':
+            LOG.debug(f'Delete linux bridge: {br_name}')
+            utils_net.delete_linux_bridge_tmux(br_name, host_iface)
+        if br_type == 'ovs_br':
+            LOG.debug(f'Delete ovs bridge: {br_name}')
+            utils_net.delete_ovs_bridge(br_name)

provider/virtual_network/network_base.py

@@ -2,15 +2,13 @@
 import shutil
 
 import aexpect
-
 from avocado.core import exceptions
 from avocado.utils import process
-
 from virttest import remote
 from virttest import utils_net
 from virttest import virsh
-
 from virttest.libvirt_xml import network_xml
+from virttest.libvirt_xml import vm_xml
 
 VIRSH_ARGS = {'ignore_status': False, 'debug': True}
 
@@ -266,15 +264,46 @@ def set_static_ip(iface, ip, netmask, session):
     session.cmd(f'ifconfig {iface} {ip}/{netmask}')
 
 
-def get_iface_xml_inst(vmxml, comment, index=0):
+def get_iface_xml_inst(vm_name, comment, index=0):
     """
     Get iface xml instance with given vm and index
 
-    :param vmxml: xml instance of vm
+    :param vm_name: name of vm
     :param comment: comment to log
     :param index: index of interface on vm, defaults to 0
     :return: xml instance of interface
     """
+    vmxml = vm_xml.VMXML.new_from_dumpxml(vm_name)
     iface = vmxml.get_devices('interface')[index]
     LOG.debug(f'Interface xml ({comment}):\n{iface}')
     return iface
+
+
+def get_ethtool_coalesce(iface):
+    """
+    Get coalesce parameters from ethtool command output
+
+    :param iface: interface name
+    :return: dict-type coalesce parameters
+    """
+    eth_out = process.run(f'ethtool -c {iface}').stdout_text
+    items = [x.split(':') for x in eth_out.replace('\t', '').splitlines() if x]
+    coalesce = {item[0]: item[1] for item in items[1:] if len(item) == 2}
+
+    return coalesce
+
+
+def check_iface_attrs(iface, key, expect_val):
+    """
+    Check whether interface attribute value meets expectation
+
+    :param iface: interface name
+    :param key: interface attribute key
+    :param expect_val: expect attribute value
+    """
+    actual_val = iface.fetch_attrs().get(key)
+    LOG.debug(f'Expect {key}: {expect_val}\n'
+              f'Actual {key}: {actual_val}')
+    if actual_val != expect_val:
+        raise exceptions.TestFail(f'Updated {key} of iface should be '
+                                  f'{expect_val}, NOT {actual_val}')