add case for virtio-mem access and discard setting

    xxxx-299163: Virtio-mem memory device with access and discard settings
Signed-off-by: nanli <[email protected]>

libvirt/tests/cfg/memory/memory_devices/virtio_mem_access_and_discard.cfg

@@ -0,0 +1,75 @@
+- memory.devices.virtio_mem.access_and_discard:
+    type = virtio_mem_access_and_discard
+    start_vm = no
+    mem_model = "virtio-mem"
+    virtio_mem_num = 6
+    share_0 = 'false'
+    discard_0 = 'False'
+    check_path = "ls -l /var/lib/libvirt/qemu/ram/%s"
+    target_size = 131072
+    requested_size = 131072
+    block_size = 2048
+    aarch64:
+        target_size = 1048576
+        requested_size = 524288
+        block_size = 524288
+    mem_basic = {'mem_model': '${mem_model}', 'target': {'requested_unit': 'KiB', 'size': ${target_size}, 'size_unit': 'KiB', 'requested_size': ${requested_size}, 'block_unit': 'KiB', 'block_size': ${block_size}}}
+    required_kernel = [5.14.0,)
+    guest_required_kernel = [5.8.0,)
+    func_supported_since_libvirt_ver = (8, 0, 0)
+    func_supported_since_qemu_kvm_ver = (6, 2, 0)
+    variants memory_backing:
+        - file:
+            source_type = 'file'
+            source_attr = "'source_type':'${source_type}'"
+        - anonymous:
+            source_type = 'anonymous'
+            source_attr = "'source_type':'${source_type}'"
+        - memfd:
+            source_type = 'memfd'
+            source_attr = "'source_type':'${source_type}'"
+            discard_error = 'yes'
+            discard_error_msg = "Property 'memory-backend-memfd.discard-data' not found"
+    variants:
+        - undefined:
+            memfd:
+                share_0 = 'true'
+            file:
+                discard_0 = 'False'
+            anonymous:
+                discard_error = 'yes'
+                discard_error_msg = "Property 'memory-backend-ram.discard-data' not found"
+        - shared_and_discard:
+            discard_attr = "'discard':'yes'"
+            access_attr = "'access_mode':'shared'"
+            share_0 = 'true'
+            file:
+                discard_0 = 'True'
+            anonymous:
+                discard_0 = 'True'
+        - private_and_no_discard:
+            access_attr = "'access_mode':'private'"
+            file:
+                discard_0 = 'False'
+            anonymous:
+                discard_0 = 'False'
+    expected_share = ['${share_0}', 'true', 'true', 'false', 'false', 'true']
+    check_discard = '{"execute":"qom-get", "arguments":{"path":"/objects/%s", "property":"discard-data"}}'
+    expected_discard = ['${discard_0}', 'True', 'True', 'False', 'False', 'True']
+    variants:
+        - with_numa:
+            no s390-virtio
+            mem_value = 3145728
+            current_mem = 3145728
+            max_mem = 10485760
+            numa_mem = 1048576
+            aarch64:
+                max_mem = 20971520
+            mem_access_1 = "shared"
+            discard_1 = "yes"
+            mem_access_2 = "private"
+            discard_2 = "no"
+            base_attrs = "'vcpu': 6, 'placement': 'static', 'memory_unit':'KiB','memory':${mem_value},'current_mem':${current_mem},'current_mem_unit':'KiB'"
+            numa_attrs = "'cpu': {'numa_cell': [{'id': '0', 'cpus': '0-1', 'memory': '${numa_mem}', 'unit': 'KiB'}, {'id': '1', 'cpus': '2-3', 'memory': '${numa_mem}', 'unit': 'KiB', 'memAccess':'${mem_access_1}','discard':'${discard_1}'},{'id':'2','cpus': '4-5','memory':'${numa_mem}','unit':'KiB', 'memAccess':'${mem_access_2}','discard':'${discard_2}'}]}"
+            max_attrs = "'max_mem_rt': ${max_mem}, 'max_mem_rt_slots': 16, 'max_mem_rt_unit': 'KiB'"
+            vm_attrs = {${base_attrs}, ${numa_attrs}, ${max_attrs}}

libvirt/tests/src/memory/memory_devices/virtio_mem_access_and_discard.py

@@ -0,0 +1,204 @@
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#
+#   Copyright Redhat
+#
+#   SPDX-License-Identifier: GPL-2.0
+
+#   Author: Nannan Li <[email protected]>
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+import re
+import json
+
+from avocado.utils import process
+
+from virttest import virsh
+
+from virttest.libvirt_xml.devices import memory
+from virttest.libvirt_xml import vm_xml
+from virttest.utils_libvirtd import Libvirtd
+
+from provider.memory import memory_base
+
+
+def get_vm_attrs(test, params):
+    """
+    Get vm attrs.
+
+    :param test: test object
+    :param params: dictionary with the test parameters
+    :return vm_attrs: get updated vm attrs dict.
+    """
+    vm_attrs = eval(params.get("vm_attrs", "{}"))
+    source_attr = params.get("source_attr", "")
+    discard_attr = params.get("discard_attr", "")
+    access_attr = params.get("access_attr", "")
+
+    mb_value = ""
+    for item in [source_attr, discard_attr, access_attr]:
+        if item != "":
+            mb_value += item + ","
+    mb_attrs = eval("{'mb':{%s}}" % mb_value[:-1])
+
+    vm_attrs.update(mb_attrs)
+    test.log.debug("Get current vm attrs is :%s", vm_attrs)
+
+    return vm_attrs
+
+
+def get_virtio_mem(test, params):
+    """
+    Get 6 basic different virtio-mem memory devices.
+
+    :param test: test object.
+    :param params: dictionary with the test parameters.
+    :return mem_list: virtio-mem attr dict list.
+    """
+    mem_list = []
+    for item in [(None, None, 0), ('shared', 'yes', 0),
+                 (None, None, 1), ('private', 'no', 1),
+                 (None, None, 2), ('shared', 'yes', 2)]:
+
+        single_mem = eval(params.get("mem_basic"))
+        target = single_mem['target']
+        target.update({'node': item[2]})
+
+        if item[0] is not None:
+            single_mem.update({'mem_access': item[0]})
+        if item[1] is not None:
+            single_mem.update({'mem_discard': item[1]})
+        mem_list.append(single_mem)
+
+    test.log.debug("Get all virtio-mem list:'%s'", mem_list)
+    return mem_list
+
+
+def check_access_and_discard(test, params, vm,
+                             expected_share, expected_discard):
+    """
+    Check access and discard setting.
+
+    :param test: test object.
+    :param params: dictionary with the test parameters.
+    :param vm: vm object.
+    :param expected_share: expected access shared value list.
+    :param expected_discard: expected discard value list.
+    """
+    virtio_mem_num = int(params.get("virtio_mem_num"))
+    check_discard = params.get("check_discard")
+    discard_error_msg = params.get("discard_error_msg")
+    mem_name_list = []
+
+    # Check access share setting
+    ret = virsh.qemu_monitor_command(vm.name, "info memdev", "--hmp",
+                                     debug=True).stdout_text.replace("\r\n", "")
+    for index in range(virtio_mem_num):
+        mem_name = "memvirtiomem%d" % index
+        pattern = "memory backend: %s.*share: %s " % (mem_name, expected_share[index])
+        if not re.search(pattern, ret):
+            test.fail("Expect '%s' exist, but not found" % pattern)
+        else:
+            test.log.debug("Check access shared value is '%s': PASS", pattern)
+        mem_name_list.append(mem_name)
+
+    # Check discard setting
+    for index, mem_name in enumerate(mem_name_list):
+        res = virsh.qemu_monitor_command(
+            vm.name, check_discard % mem_name, debug=True).stdout_text
+
+        if 'return' in json.loads(res):
+            actual_discard = str(json.loads(res)['return'])
+            if actual_discard != expected_discard[index]:
+                test.fail("Expect discard is '%s', but got '%s'" % (
+                    expected_discard[index], actual_discard))
+            else:
+                test.log.debug("Check discard value is '%s' PASS", actual_discard)
+        else:
+            actual_error = json.loads(res)['error']['desc']
+            if not re.search(discard_error_msg, actual_error):
+                test.fail("Expected to get '%s' in '%s'" % (discard_error_msg,
+                                                            actual_error))
+            else:
+                test.log.debug("Check '%s' PASS ", actual_error)
+
+
+def run(test, params, env):
+    """
+    Verify virtio-mem memory device works with access and discard settings.
+    """
+    def run_test():
+        """
+        1.Define vm with virtio-mem device
+        2.Check the virtio-mem memory device access and discard setting
+        3.Define vm without virtio-mem device and restart service, and hotplug
+        virtio-mem device.
+        """
+        test.log.info("TEST_STEP1: Define vm with virtio-mem")
+        vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
+        vm_attrs = get_vm_attrs(test, params)
+        vmxml.setup_attrs(**vm_attrs)
+
+        virtio_mems = get_virtio_mem(test, params)
+        for mem in virtio_mems:
+            virtio_mem = memory.Memory()
+            virtio_mem.setup_attrs(**mem)
+            vmxml.devices = vmxml.devices.append(virtio_mem)
+        vmxml.sync()
+
+        test.log.info("TEST_STEP2: Start guest")
+        vm.start()
+
+        test.log.info("TEST_STEP3,4: Check virtio-mem access and discard")
+        check_access_and_discard(test, params, vm, expected_share,
+                                 expected_discard)
+
+        test.log.info("TEST_STEP5: Destroy vm")
+        vm.destroy()
+
+        test.log.info("TEST_STEP6: Check the host path for memory file backing")
+        res = process.run(check_path % vm_name, shell=True, ignore_status=True).stderr_text
+        if not re.search(path_error, res):
+            test.fail("Expected '%s', but got '%s'" % (path_error, res))
+
+        test.log.info("TEST_STEP7: Define guest without virtio-mem memory")
+        bkxml.setup_attrs(**vm_attrs)
+        bkxml.sync()
+        vm.start()
+
+        test.log.info("TEST_STEP8: Restart service")
+        Libvirtd().restart()
+
+        test.log.info("TEST_STEP9: Hot plug all memory device")
+        for mem in virtio_mems:
+            virtio_mem = memory.Memory()
+            virtio_mem.setup_attrs(**mem)
+            virsh.attach_device(vm_name, virtio_mem.xml,
+                                debug=True, ignore_status=False)
+
+        test.log.info("TEST_STEP10: Check discard and access again.")
+        check_access_and_discard(test, params, vm,
+                                 expected_share, expected_discard)
+
+    def teardown_test():
+        """
+        Clean data.
+        """
+        test.log.info("TEST_TEARDOWN: Clean up env.")
+        bkxml.sync()
+
+    vm_name = params.get("main_vm")
+    vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
+    bkxml = vmxml.copy()
+    vm = env.get_vm(vm_name)
+
+    expected_share = eval(params.get("expected_share"))
+    expected_discard = eval(params.get("expected_discard"))
+    check_path = params.get("check_path")
+    path_error = params.get("path_error", "No such file or directory")
+
+    try:
+        memory_base.check_supported_version(params, test, vm)
+        run_test()
+
+    finally:
+        teardown_test()