virtual_network: Add a case about mem_lock limit for vm with multiple…

… vdpa interfaces

This PR adds:
    VIRT-296169 - [vdpa] Check the mem_lock limit when start vm
        with multiple vdpa interfaces

Signed-off-by: Yingshun Cui <[email protected]>

libvirt/tests/cfg/virtual_network/locked_memory_vdpa/mem_lock_limit_multiple_vdpa_interfaces.cfg

@@ -0,0 +1,10 @@
+- virtual_network.locked_memory.vdpa_interfaceiface.multiple_interfaces:
+    type = mem_lock_limit_multiple_vdpa_interfaces
+    start_vm = no
+    only x86_64
+
+    func_supported_since_libvirt_ver = (8, 7, 0)
+    vm_attrs = {'max_mem_rt': 6291456, 'max_mem_rt_slots': 32, 'max_mem_rt_unit': 'K', 'current_mem':3, 'current_mem_unit': 'GiB','vcpu': 8, 'cpu': {'numa_cell': [{'id': '0', 'cpus': '0-3', 'memory': '1', 'unit': 'GiB'}, {'id': '1', 'cpus': '4-7', 'memory': '1', 'unit': 'GiB'}]}}
+    iface_dict1 = {"source": {'dev':'/dev/vhost-vdpa-0'}}
+    iface_dict2 = {"source": {'dev':'/dev/vhost-vdpa-1'}}
+    iface_dict3 = {"source": {'dev':'/dev/vhost-vdpa-2'}}

libvirt/tests/src/virtual_network/locked_memory_vdpa/mem_lock_limit_multiple_vdpa_interfaces.py

@@ -0,0 +1,69 @@
+from avocado.utils import process
+
+from virttest import libvirt_version
+from virttest import utils_vdpa
+
+from virttest.libvirt_xml import vm_xml
+from virttest.utils_libvirt import libvirt_memory
+from virttest.utils_libvirt import libvirt_vmxml
+from virttest.utils_test import libvirt
+
+from provider.interface import interface_base
+
+
+def run(test, params, env):
+    """
+    Check mem_lock limit for vm with multiple vDPA interfaces.
+    """
+    libvirt_version.is_libvirt_feature_supported(params)
+    # Variable assignment
+    dev_type = params.get('dev_type', 'vdpa')
+    iface_num = 3
+    vm_name = params.get('main_vm')
+    vm = env.get_vm(vm_name)
+
+    vmxml = vm_xml.VMXML.new_from_dumpxml(vm_name)
+    backup_vmxml = vmxml.copy()
+
+    try:
+        pf_pci = utils_vdpa.get_vdpa_pci()
+        test_env_obj = utils_vdpa.VDPAOvsTest(pf_pci)
+        test_env_obj.setup()
+        qemu_log = "/var/log/libvirt/qemu/%s.log" % vm.name
+        process.run("echo > {}".format(qemu_log), shell=True)
+
+        libvirt_vmxml.remove_vm_devices_by_type(vm, 'interface')
+
+        vm_attrs = eval(params.get('vm_attrs', '{}'))
+        vmxml = vm_xml.VMXML.new_from_dumpxml(vm_name)
+        vmxml.setup_attrs(**vm_attrs)
+        vmxml.sync()
+        test.log.debug("Updated VM xml: %s.",
+                       vm_xml.VMXML.new_from_dumpxml(vm_name))
+        for idx in range(iface_num):
+            default_iface = {'source': {'dev': '/dev/vhost-vdpa-%s' % str(idx)}}
+            iface_dict = eval(params.get(
+                'iface_dict%s' % str(idx+1), str(default_iface)))
+            if iface_dict:
+                iface_dev = interface_base.create_iface(dev_type, iface_dict)
+                libvirt.add_vm_device(vm_xml.VMXML.new_from_dumpxml(vm_name),
+                                      iface_dev)
+        test.log.debug("VM xml after updating ifaces: %s.",
+                       vm_xml.VMXML.new_from_dumpxml(vm_name))
+
+        test.log.info("TEST_STEP: Start the vm with 3 vDPA interfaces.")
+        vm.start()
+        vm.wait_for_serial_login(timeout=240).close()
+
+        new_vmxml = vm_xml.VMXML.new_from_dumpxml(vm_name)
+        expr_memlock = libvirt_memory.normalize_mem_size(
+            new_vmxml.get_current_mem(),
+            new_vmxml.get_current_mem_unit()) * 3 + 1073741824
+        if not libvirt_memory.comp_memlock(expr_memlock):
+            test.fail("Unable to get correct MEMLOCK after VM startup!")
+
+        test.log.info("TEST_STEP: Check qemu log.")
+        libvirt.check_logfile("fail|error", qemu_log, str_in_log=False)
+    finally:
+        backup_vmxml.sync()
+        test_env_obj.cleanup()