Python virsh.has_command_help_match函数代码示例

def remote_test(remote_ip, local_ip, remote_pwd, remote_prompt,
                vm_name, status_error_test):
    """
    Test remote case
    """
    err = ""
    status = 1
    status_error = status_error_test
    try:
        remote_uri = libvirt_vm.complete_uri(local_ip)
        session = remote.remote_login("ssh", remote_ip, "22",
                                      "root", remote_pwd, remote_prompt)
        session.cmd_output('LANG=C')
        command = "virsh -c %s setvcpus %s 1 --live" % (remote_uri, vm_name)
        if virsh.has_command_help_match("setvcpus", "--live") is None:
            raise error.TestNAError("The current libvirt doesn't support"
                                    " '--live' option for setvcpus")
        status, output = session.cmd_status_output(command, internal_timeout=5)
        session.close()
        if status != 0:
            err = output
    except error.CmdError:
        status = 1
        err = "remote test failed"
    return status, status_error, err

def run(test, params, env):
    """
    Test command: virsh qemu-agent-command.
    """
    vm_name = params.get("main_vm")
    vm = env.get_vm(vm_name)
    vm_ref = params.get("vm_ref", "domname")
    vm_state = params.get("vm_state", "running")
    cmd = params.get("agent_cmd", "")
    options = params.get("options", "")
    needs_agent = "yes" == params.get("needs_agent", "yes")
    status_error = "yes" == params.get("status_error", "no")
    if not status_error and options:
        option = options.split()[0]
        test_cmd = "qemu-agent-command"
        if virsh.has_command_help_match(test_cmd, option) is None:
            raise error.TestNAError("The current libvirt doesn't support"
                                    " %s option for %s" % (option, test_cmd))
    guest_cpu_busy = "yes" == params.get("guest_cpu_busy", "no")
    password = params.get("password", None)
    domuuid = vm.get_uuid()
    domid = ""
    xml_file = os.path.join(test.tmpdir, "vm.xml")
    virsh.dumpxml(vm_name, extra="--inactive", to_file=xml_file)
    libvirtd_inst = utils_libvirtd.Libvirtd()

    # Prepare domain
    try:
        reset_domain(vm, vm_state, needs_agent, guest_cpu_busy, password)
    except error.TestNAError, details:
        reset_env(vm_name, xml_file)
        raise error.TestNAError(details)

    def check_virsh_command_and_option(command, option=None):
        """
        Check if virsh command exists

        :param command: the command to be checked
        :param option: the command option to be checked
        """
        msg = "This version of libvirt does not support "
        if not virsh.has_help_command(command):
            test.cancel(msg + "virsh command '%s'" % command)

        if option and not virsh.has_command_help_match(command, option):
            test.cancel(msg + "virsh command '%s' with option '%s'" % (command,
                                                                       option))

def remote_test(remote_ip, local_ip, remote_pwd, remote_prompt, vm_name):
    """
    Test remote case
    """
    err = ""
    try:
        remote_uri = libvirt_vm.complete_uri(local_ip)
        session = remote.remote_login("ssh", remote_ip, "22",
                                      "root", remote_pwd, remote_prompt)
        session.cmd_output('LANG=C')
        command = "virsh -c %s setvcpus %s 1 --live" % (remote_uri, vm_name)
        if virsh.has_command_help_match(command, "--live") is None:
            status_error = "yes"
        status, output = session.cmd_status_output(command, internal_timeout=5)
        session.close()
        if status != 0:
            err = output
    except error.CmdError:
        status = 1
        status_error = "yes"
        err = "remote test failed"
    return status, status_error, err

 def operate(self, index):
     """
     Return True/False (good/bad) result of operating on a device
     """
     vadu_dargs = make_vadu_dargs(self.test_params,
                                  self.device_xmls[index].xml)
     # Acts as a dict for it's own API params
     self.test_params.virsh['debug'] = True
     vadu_dargs.update(self.test_params.virsh)
     options = vadu_dargs.get('flagstr')
     if options:
         opt_list = options.split()
         for opt in opt_list:
             if not virsh.has_command_help_match("attach-device", opt) and\
                not self.test_params.status_error:
                 raise error.TestNAError("Current libvirt version doesn't "
                                         "support '%s' for attach-device"
                                         " command" % opt)
     cmdresult = self.test_params.virsh.attach_device(**vadu_dargs)
     self.test_params.virsh['debug'] = False
     # Command success is not enough, must also confirm activity worked
     if (cmdresult.exit_status == 0):
         if (cmdresult.stdout.count('attached successfully') or
                 cmdresult.stderr.count('attached successfully')):
             return True
     else:
         if (cmdresult.stderr.count("XML error") or
                 cmdresult.stdout.count("XML error")):
             logging.error("Errant XML:")
             xmldevice = self.device_xmls[index]
             # All LibvirtXMLBase subclasses string-convert into raw XML
             for line in str(xmldevice).splitlines():
                 logging.error("     %s", line)
         # See analyze_negative_results - expects return of true
         if self.test_params.status_error:
             return True
         else:
             return False

    def operate(self, index):
        """
        Return True/False (good/bad) result of operating on a device
        """
        vadu_dargs = make_vadu_dargs(self.test_params,
                                     self.device_xmls[index].xml,
                                     self.test)
        # Acts as a dict for it's own API params
        self.test_params.virsh['debug'] = True
        vadu_dargs.update(self.test_params.virsh)
        options = vadu_dargs.get('flagstr')
        if options:
            opt_list = options.split()
            for opt in opt_list:
                if not virsh.has_command_help_match("attach-device", opt) and\
                   not self.test_params.status_error:
                    self.test.cancel("Current libvirt version doesn't "
                                     "support '%s' for attach-device"
                                     " command" % opt)
        cmdresult = self.test_params.virsh.attach_device(**vadu_dargs)
        self.test_params.virsh['debug'] = False
        # Command success is not enough, must also confirm activity worked

        # output XML no matter attach pass or not
        logging.debug("Attached XML:")
        for line in str(self.device_xmls[index]).splitlines():
            logging.debug("%s", line)

        if (cmdresult.exit_status == 0):
            if (cmdresult.stdout.strip().count('attached successfully') or
                    cmdresult.stderr.strip().count('attached successfully')):
                return True
        else:
            # See analyze_negative_results - expects return of true
            if self.test_params.status_error:
                return True
            else:
                return False

def run(test, params, env):
    """
    Test the command virsh memtune

    (1) To get the current memtune parameters
    (2) Change the parameter values
    (3) Check the memtune query updated with the values
    (4) Check whether the mounted cgroup path gets the updated value
    (5) Login to guest and use the memory greater that the assigned value
        and check whether it kills the vm.
    (6) TODO:Check more values and robust scenarios.
    """

    def check_limit(path, expected_value, limit_name):
        """
        Matches the expected and actual output
        (1) Match the output of the virsh memtune
        (2) Match the output of the respective cgroup fs value

        :params: path: memory controller path for a domain
        :params: expected_value: the expected limit value
        :params: limit_name: the limit to be checked
                             hard_limit/soft_limit/swap_hard_limit
        :return: True or False based on the checks
        """
        status_value = True
        # Check 1
        actual_value = virsh.memtune_get(domname, limit_name)
        if actual_value == -1:
            raise error.TestFail("the key %s not found in the "
                                 "virsh memtune output" % limit_name)
        if actual_value != int(expected_value):
            status_value = False
            logging.error("%s virsh output:\n\tExpected value:%d"
                          "\n\tActual value: "
                          "%d", limit_name,
                          int(expected_value), int(actual_value))

        # Check 2
        if limit_name == 'hard_limit':
            cg_file_name = '%s/memory.limit_in_bytes' % path
        elif limit_name == 'soft_limit':
            cg_file_name = '%s/memory.soft_limit_in_bytes' % path
        elif limit_name == 'swap_hard_limit':
            cg_file_name = '%s/memory.memsw.limit_in_bytes' % path

        cg_file = None
        try:
            try:
                cg_file = open(cg_file_name)
                output = cg_file.read()
                value = int(output) / 1024
                if int(expected_value) != int(value):
                    status_value = False
                    logging.error("%s cgroup fs:\n\tExpected Value: %d"
                                  "\n\tActual Value: "
                                  "%d", limit_name,
                                  int(expected_value), int(value))
            except IOError:
                status_value = False
                logging.error("Error while reading:\n%s", cg_file_name)
        finally:
            if cg_file is not None:
                cg_file.close()

        return status_value

    # Get the vm name, pid of vm and check for alive
    domname = params.get("main_vm")
    vm = env.get_vm(params["main_vm"])
    vm.verify_alive()
    pid = vm.get_pid()
    logging.info("Verify valid cgroup path for VM pid: %s", pid)

    # Resolve the memory cgroup path for a domain
    path = utils_cgroup.resolve_task_cgroup_path(int(pid), "memory")

    # Set the initial memory starting value for test case
    # By default set 1GB less than the total memory
    # In case of total memory is less than 1GB set to 256MB
    # visit subtests.cfg to change these default values
    Memtotal = utils_memory.read_from_meminfo('MemTotal')
    base_mem = params.get("memtune_base_mem")

    if int(Memtotal) < int(base_mem):
        Mem = int(params.get("memtune_min_mem"))
    else:
        Mem = int(Memtotal) - int(base_mem)

    # Initialize error counter
    error_counter = 0

    # Check for memtune command is available in the libvirt version under test
    if not virsh.has_help_command("memtune"):
        raise error.TestNAError(
            "Memtune not available in this libvirt version")

    # Run test case with 100kB increase in memory value for each iteration
    while (Mem < Memtotal):
        if virsh.has_command_help_match("memtune", "hard-limit"):
#.........这里部分代码省略.........

#.........这里部分代码省略.........
                logging.error("Compress dumped file to %s fail: %s" %
                              (dump_image_format, actual_format))
                return False
            else:
                return True

    # Configure dump_image_format in /etc/libvirt/qemu.conf.
    qemu_config = utils_config.LibvirtQemuConfig()
    libvirtd = utils_libvirtd.Libvirtd()
    if len(dump_image_format):
        qemu_config.dump_image_format = dump_image_format
        libvirtd.restart()

    # Deal with bypass-cache option
    child_pid = 0
    if options.find('bypass-cache') >= 0:
        pid = os.fork()
        if pid:
            # Guarantee check_bypass function has run before dump
            child_pid = pid
            try:
                wait_pid_active(pid, timeout)
            finally:
                os.kill(child_pid, signal.SIGUSR1)
        else:
            check_bypass(dump_file)
            # Wait for parent process over
            while True:
                time.sleep(1)

    # Deal with memory-only dump format
    if len(memory_dump_format):
        # Make sure libvirt support this option
        if virsh.has_command_help_match("dump", "--format") is None:
            raise error.TestNAError("Current libvirt version doesn't support"
                                    " --format option for dump command")
        # Make sure QEMU support this format
        query_cmd = '{"execute":"query-dump-guest-memory-capability"}'
        qemu_capa = virsh.qemu_monitor_command(vm_name, query_cmd).stdout
        if (memory_dump_format not in qemu_capa) and not status_error:
            raise error.TestNAError("Unsupported dump format '%s' for"
                                    " this QEMU binary" % memory_dump_format)
        options += " --format %s" % memory_dump_format
        if memory_dump_format == 'elf':
            dump_image_format = 'elf'
        if memory_dump_format in ['kdump-zlib', 'kdump-lzo', 'kdump-snappy']:
            dump_image_format = 'data'

    # Back up xml file
    vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
    backup_xml = vmxml.copy()

    dump_guest_core = params.get("dump_guest_core", "")
    if dump_guest_core not in ["", "on", "off"]:
        raise error.TestError("invalid dumpCore value: %s" % dump_guest_core)
    try:
        # Set dumpCore in guest xml
        if dump_guest_core:
            if vm.is_alive():
                vm.destroy(gracefully=False)
            vmxml.dumpcore = dump_guest_core
            vmxml.sync()
            vm.start()
            # check qemu-kvm cmdline
            vm_pid = vm.get_pid()
            cmd = "cat /proc/%d/cmdline|xargs -0 echo" % vm_pid

#.........这里部分代码省略.........
        if not re.search(source_iso, output2):
            raise  error.TestFail("didn't see 'attached disk")
        if not re.search('hdc', output3):
            raise  error.TestFail("didn't see 'attached device")


    domid = vm.get_id()
    domuuid = vm.get_uuid()

    # Prepare tmp directory and files.
    tmp_iso = os.path.join(test.virtdir, "tmp.iso")
    tmp2_iso = os.path.join(test.virtdir, "tmp2.iso")
    update_xmlfile = os.path.join(test.tmpdir, "xml_file")

    # Get all parameters for configuration.
    flag = params.get("updatedevice_flag", "")
    twice = "yes" == params.get("updatedevice_twice", "no")
    diff_iso = params.get("updatedevice_diff_iso", "no")
    vm_ref = params.get("updatedevice_vm_ref", "")
    status_error = params.get("status_error", "no")
    extra = params.get("updatedevice_extra", "")

    create_attach_xml(update_xmlfile, tmp_iso)
    vm_xml = os.path.join(test.tmpdir, "vm_xml")
    virsh.dumpxml(vm_name, extra="", to_file=vm_xml)
    vmxml_before = libvirt_xml.VMXML.new_from_dumpxml(vm_name)

    if vm_ref == "id":
        vm_ref = domid
        if twice:
            virsh.update_device(domainarg=domid, filearg=update_xmlfile,
                                ignore_status=True)
        if diff_iso == "yes":
            os.remove(update_xmlfile)
            create_attach_xml(update_xmlfile, tmp2_iso)
    elif vm_ref == "uuid":
        vm_ref = domuuid
    elif vm_ref == "hex_id":
        vm_ref = hex(int(domid))
    elif vm_ref.find("updatedevice_invalid") != -1:
        vm_ref = params.get(vm_ref)
    elif vm_ref == "name":
        vm_ref = "%s %s" % (vm_name, extra)

    status = virsh.update_device(domainarg=vm_ref, filearg=update_xmlfile,
                    flagstr=flag, ignore_status=True, debug=True).exit_status

    output = "%s" % libvirt_xml.VMXML.new_from_dumpxml(vm_name)
    if params.has_key("updatedevice_diff_file"):
        vm_xml_after = os.path.join(test.tmpdir, "vm_xml_after")
        virsh.dumpxml(vm_name, extra="", to_file=vm_xml_after)
    vm.destroy()
    output_shut = "%s" % libvirt_xml.VMXML.new_from_dumpxml(vm_name)

    # Recover environment
    vm.undefine()
    vmxml_before.define()
    if os.path.exists(tmp_iso):
        os.remove(tmp_iso)
    if os.path.exists(tmp2_iso):
        os.remove(tmp2_iso)

    # Check status_error
    flag_list = flag.split("--")
    for item in flag_list:
        option = item.strip()
        if option == "":
            continue
        if virsh.has_command_help_match("update-device", option) == None:
            status_error = "yes"
            break
    if status_error == "yes":
        if status == 0:
            raise error.TestFail("Run successfully with wrong command!")
    elif status_error == "no":
        if status != 0:
            raise error.TestFail("Run failed with right command")
        else:
            if flag == "--persistent" or flag == "--config":
                if not re.search(tmp_iso, output_shut):
                    raise error.TestFail("virsh update-device function invalid"
                                         "didn't see 'attached device' in XML")
            else:
                if params.has_key("updatedevice_diff_file"):
                    context_before = file(vm_xml, 'r').read().splitlines()
                    context_after = file(vm_xml_after, 'r').read().splitlines()
                    output_diff = difflib.Differ().compare(context_before,
                                                           context_after)
                    if not re.search(tmp_iso, "\n".join(list(output_diff))):
                        raise  error.TestFail("virsh update-device function "
                        "invalid; can't see 'attached device'in before/after")
                else:
                    if re.search(tmp_iso, output_shut):
                        raise  error.TestFail("virsh attach-device without "
                        "--persistent/--config function invalid;can see "
                        "'attached device'in XML")
            if diff_iso == "yes":
                check_attach(tmp2_iso, output)
            if  vm_ref == "name":
                check_attach(tmp_iso, output)

 def is_old_libvirt():
     regex = r"\s+\[--size\]\s+"
     return bool(not virsh.has_command_help_match("setmem", regex))

def run_virsh_setvcpus(test, params, env):
    """
    Test command: virsh setvcpus.

    The conmand can change the number of virtual CPUs in the guest domain.
    1.Prepare test environment,destroy or suspend a VM.
    2.Perform virsh setvcpus operation.
    3.Recover test environment.
    4.Confirm the test result.
    """

    vm_name = params.get("main_vm")
    vm = env.get_vm(vm_name)
    xml_file = params.get("setvcpus_xml_file", "vm.xml")
    virsh.dumpxml(vm_name, extra="--inactive", to_file=xml_file)
    tmp_file = params.get("setvcpus_tmp_file", "tmp.xml")
    pre_vm_state = params.get("setvcpus_pre_vm_state")
    command = params.get("setvcpus_command", "setvcpus")
    options = params.get("setvcpus_options")
    domain = params.get("setvcpus_domain")
    count = params.get("setvcpus_count")
    extra_param = params.get("setvcpus_extra_param")
    count_option = "%s %s" % (count, extra_param)
    status_error = params.get("status_error")

    def get_current_vcpus():
        """
        Get current vcpu number.
        """
        vcpus_set = ""
        virsh.dumpxml(vm_name, extra="", to_file=tmp_file)
        dom = parse(tmp_file)
        root = dom.documentElement
        vcpus_2 = root.getElementsByTagName("vcpu")
        for n in vcpus_2:
            vcpus_set += n.getAttribute("current")
            vcpus_set = int(vcpus_set)
        dom.unlink()
        return vcpus_set

    if vm.is_alive():
        vm.destroy()
    vm_xml = libvirt_xml.VMXML()
    vm_xml.set_vm_vcpus(vm_name, 2)
    vm.start()
    vm.wait_for_login()

    if status_error == "no":
        vcpus_new = len(vm.vcpuinfo())
    domid = vm.get_id()
    domuuid = vm.get_uuid()
    if pre_vm_state == "paused":
        vm.pause()
    elif pre_vm_state == "shut off":
        vm.destroy()

    if domain == "remote_name":
        remote_ssh_addr = params.get("remote_ip", None)
        remote_addr = params.get("local_ip", None)
        remote_password = params.get("remote_password", None)
        host_type = virsh.driver()
        if host_type == "qemu":
            remote_string = "qemu+ssh://%s/system" % remote_addr
        elif host_type == "xen":
            remote_string = "xen+ssh://%s" % remote_addr
        command = "virsh -c %s setvcpus %s 1 --live" % (remote_string, vm_name)
        if virsh.has_command_help_match(command, "--live") is None:
            status_error = "yes"
        session = remote.remote_login(
            "ssh", remote_ssh_addr, "22", "root", remote_password, "#")
        session.cmd_output('LANG=C')
        status, output = session.cmd_status_output(command, internal_timeout=5)
        session.close()
        vcpus_current = len(vm.vcpuinfo())
    else:
        if domain == "name":
            dom_option = vm_name
        elif domain == "id":
            dom_option = domid
            if params.get("setvcpus_hex_id") is not None:
                dom_option = hex(int(domid))
            elif params.get("setvcpus_invalid_id") is not None:
                dom_option = params.get("setvcpus_invalid_id")
        elif domain == "uuid":
            dom_option = domuuid
            if params.get("setvcpus_invalid_uuid") is not None:
                dom_option = params.get("setvcpus_invalid_uuid")
        else:
            dom_option = domain
        option_list = options.split(" ")
        for item in option_list:
            if virsh.has_command_help_match(command, item) is None:
                status_error = "yes"
                break
        status = virsh.setvcpus(
            dom_option, count_option, options, ignore_status=True).exit_status
        if pre_vm_state == "paused":
            virsh.resume(vm_name, ignore_status=True)
        if status_error == "no":
            if status == 0:
#.........这里部分代码省略.........

            iface.mac_address = iface_mac_address
            iface.source = dict(network=iface_network)
            iface.model = iface_model_type
            iface.xmltreefile.write()
            shutil.copyfile(iface.xml, device_xml_file)
        return device_xml_file

    vm_ref = params.get("dt_device_vm_ref", "name")
    dt_options = params.get("dt_device_options", "")
    pre_vm_state = params.get("dt_device_pre_vm_state", "running")
    status_error = "yes" == params.get("status_error", 'no')
    no_attach = "yes" == params.get("dt_device_no_attach", 'no')
    os_type = params.get("os_type", "linux")
    device = params.get("dt_device_device", "disk")
    test_cmd = "detach-device"
    if not virsh.has_command_help_match(test_cmd, dt_options) and\
       not status_error:
        raise error.TestNAError("Current libvirt version doesn't support '%s'"
                                " for %s" % (dt_options, test_cmd))

    # Disk specific attributes.
    device_source_name = params.get("dt_device_device_source", "attach.img")
    device_target = params.get("dt_device_device_target", "vdd")
    device_bus = params.get("dt_device_bus_type")
    test_block_dev = "yes" == params.get("dt_device_iscsi_device", "no")

    # interface specific attributes.
    iface_network = params.get("dt_device_iface_network")
    iface_model_type = params.get("dt_device_iface_model_type")
    iface_mac_address = params.get("dt_device_iface_mac_address")

    delay = int(params.get("virsh_migrate_delay", 10))
    status_error = params.get("status_error", 'no')
    libvirtd_state = params.get("virsh_migrate_libvirtd_state", 'on')
    src_state = params.get("virsh_migrate_src_state", "running")
    migrate_uri = params.get("virsh_migrate_migrateuri", None)
    shared_storage = params.get("virsh_migrate_shared_storage", None)
    dest_xmlfile = ""

    # Direct migration is supported only for Xen in libvirt
    if options.count("direct") or extra.count("direct"):
        if params.get("driver_type") is not "xen":
            raise error.TestNAError("Direct migration is supported only for "
                                    "Xen in libvirt.")

    if options.count("compressed") and not \
            virsh.has_command_help_match("migrate", "--compressed"):
        raise error.TestNAError("Do not support compressed option on this version.")

    # Add migrateuri if exists and check for default example
    if migrate_uri:
        if migrate_uri.count("EXAMPLE"):
            raise error.TestNAError("Set up the migrate_uri.")
        extra = ("%s --migrateuri=%s" % (extra, migrate_uri))

    # To migrate you need to have a shared disk between hosts
    if shared_storage.count("EXAMPLE"):
        raise error.TestError("For migration you need to have a shared "
                              "storage.")

    # Get expected cache state for test
    attach_scsi_disk = "yes" == params.get("attach_scsi_disk", "no")

def run(test, params, env):
    """
    Test command: virsh net-dumpxml.

    This command can output the network information as an XML dump to stdout.
    1.Get all parameters from config file.
    2.If test case's network status is inactive, destroy it.
    3.Perform virsh net-dumpxml operation.
    4.Recover test environment(network status).
    5.Confirm the test result.
    """
    status_error = params.get("status_error", "no")
    net_ref = params.get("net_dumpxml_net_ref")
    net_name = params.get("net_dumpxml_network", "default")
    net_status = params.get("net_dumpxml_network_status", "active")
    xml_flie = params.get("net_dumpxml_xml_file", "default.xml")
    extra = params.get("net_dumpxml_extra", "")
    network_xml = os.path.join(data_dir.get_tmp_dir(), xml_flie)

    # acl polkit params
    uri = params.get("virsh_uri")
    unprivileged_user = params.get('unprivileged_user')
    if unprivileged_user:
        if unprivileged_user.count('EXAMPLE'):
            unprivileged_user = 'testacl'

    if not libvirt_version.version_compare(1, 1, 1):
        if params.get('setup_libvirt_polkit') == 'yes':
            test.cancel("API acl test not supported in current"
                        " libvirt version.")

    # Run test case
    if net_ref == "uuid":
        net_ref = virsh.net_uuid(net_name).stdout.strip()
    elif net_ref == "name":
        net_ref = net_name

    net_status_current = "active"
    if not virsh.net_state_dict()[net_name]['active']:
        net_status_current = "inactive"

    if not virsh.net_state_dict()[net_name]['persistent']:
        test.error("Network is transient!")
    try:
        if net_status == "inactive" and net_status_current == "active":
            status_destroy = virsh.net_destroy(net_name,
                                               ignore_status=True).exit_status
            if status_destroy != 0:
                test.error("Network destroied failed!")

        virsh_dargs = {'ignore_status': True}
        if params.get('setup_libvirt_polkit') == 'yes':
            virsh_dargs['unprivileged_user'] = unprivileged_user
            virsh_dargs['uri'] = uri
        result = virsh.net_dumpxml(net_ref, extra, network_xml,
                                   **virsh_dargs)
        status = result.exit_status
        err = result.stderr.strip()
        xml_validate_cmd = "virt-xml-validate %s network" % network_xml
        valid_s = process.run(xml_validate_cmd, ignore_status=True, shell=True).exit_status

        # Check option valid or not.
        if extra.find("--") != -1:
            options = extra.split("--")
            for option in options:
                if option.strip() == "":
                    continue
                if not virsh.has_command_help_match("net-dumpxml",
                                                    option.strip()) and\
                   status_error == "no":
                    test.cancel("The current libvirt version"
                                " doesn't support '%s' option"
                                % option.strip())
    finally:
        # Recover network
        if net_status == "inactive" and net_status_current == "active":
            status_start = virsh.net_start(net_name,
                                           ignore_status=True).exit_status
            if status_start != 0:
                test.error("Network started failed!")

    # Check status_error
    if status_error == "yes":
        if status == 0:
            test.fail("Run successfully with wrong command!")
        if err == "":
            test.fail("The wrong command has no error outputed!")
    elif status_error == "no":
        if status != 0:
            test.fail("Run failed with right command!")
        if valid_s != 0:
            test.fail("Command output is invalid!")
    else:
        test.error("The status_error must be 'yes' or 'no'!")

def run_virsh_domblkstat(test, params, env):
    """
    Test command: virsh domblkstat.

    The command get device block stats for a running domain.
    1.Prepare test environment.
    2.When the libvirtd == "off", stop the libvirtd service.
    3.Perform virsh domblkstat operation.
    4.Recover test environment.
    5.Confirm the test result.
    """
    vm_name = params.get("main_vm")
    vm = env.get_vm(vm_name)

    domid = vm.get_id()
    domuuid = vm.get_uuid()
    blklist = libvirt_xml.VMXML.get_disk_blk(vm_name)
    if blklist == None:
        raise error.TestFail("Cannot find disk in %s" % vm_name)
    #Select a block device from disks
    blk = blklist[0]
    libvirtd = params.get("libvirtd", "on")
    vm_ref = params.get("domblkstat_vm_ref")
    options = params.get("domblkstat_option", "")
    status_error = params.get("status_error", "no")
    if params.get("domblkinfo_dev") == "no":
        blk = ""

    if vm_ref == "id":
        vm_ref = domid
    elif  vm_ref == "uuid":
        vm_ref = domuuid
    elif vm_ref == "hex_id":
        vm_ref = hex(int(domid))
    elif vm_ref.find("invalid") != -1:
        vm_ref = params.get(vm_ref)
    elif vm_ref == "name":
        vm_ref = "%s %s" % (vm_name, params.get("domblkstat_extra"))

    option_list = options.split(" ")
    for option in option_list:
        if virsh.has_command_help_match("domblkstat", option) == None:
            status_error = "yes"
            break
    if libvirtd == "off":
        utils_libvirtd.libvirtd_stop()

    result = virsh.domblkstat(vm_ref, blk, options, ignore_status=True)
    status = result.exit_status
    output = result.stdout.strip()
    err = result.stderr.strip()

    #recover libvirtd service start
    if libvirtd == "off":
        utils_libvirtd.libvirtd_start()
    #check status_error
    if status_error == "yes":
        if status == 0 or err == "":
            raise error.TestFail("Run successfully with wrong command!")
    elif status_error == "no":
        if status != 0 or output == "":
            raise error.TestFail("Run failed with right command")