qemu_guest_agent.py

import logging
import time
import os
import re
import base64

import aexpect

from avocado.utils import genio
from avocado.utils import path as avo_path
from avocado.utils import process
from avocado.core import exceptions

from virttest import error_context
from virttest import guest_agent
from virttest import utils_misc
from virttest import utils_disk
from virttest import env_process
from virttest import utils_net


class BaseVirtTest(object):

    def __init__(self, test, params, env):
        self.test = test
        self.params = params
        self.env = env

    def initialize(self, test, params, env):
        if test:
            self.test = test
        if params:
            self.params = params
        if env:
            self.env = env
        start_vm = self.params["start_vm"]
        self.start_vm = start_vm
        if self.start_vm == "yes":
            vm = self.env.get_vm(params["main_vm"])
            vm.verify_alive()
            self.vm = vm

    def setup(self, test, params, env):
        if test:
            self.test = test
        if params:
            self.params = params
        if env:
            self.env = env

    def run_once(self, test, params, env):
        if test:
            self.test = test
        if params:
            self.params = params
        if env:
            self.env = env

    def before_run_once(self, test, params, env):
        pass

    def after_run_once(self, test, params, env):
        pass

    def cleanup(self, test, params, env):
        pass

    def execute(self, test, params, env):
        self.initialize(test, params, env)
        self.setup(test, params, env)
        try:
            self.before_run_once(test, params, env)
            self.run_once(test, params, env)
            self.after_run_once(test, params, env)
        finally:
            self.cleanup(test, params, env)


class QemuGuestAgentTest(BaseVirtTest):

    def __init__(self, test, params, env):
        BaseVirtTest.__init__(self, test, params, env)

        self._open_session_list = []
        self.gagent = None
        self.vm = None
        self.gagent_install_cmd = params.get("gagent_install_cmd")
        self.gagent_uninstall_cmd = params.get("gagent_uninstall_cmd")

    def _get_session(self, params, vm):
        if not vm:
            vm = self.vm
        vm.verify_alive()
        timeout = int(params.get("login_timeout", 360))
        session = vm.wait_for_login(timeout=timeout)
        return session

    def _cleanup_open_session(self):
        try:
            for s in self._open_session_list:
                if s:
                    s.close()
        except Exception:
            pass

    @error_context.context_aware
    def _check_ga_pkg(self, session, cmd_check_pkg):
        '''
        Check if the package is installed
        :param session: use for sending cmd
        :param cmd_check_pkg: cmd to check if ga pkg is installed
        '''
        error_context.context("Check whether qemu-ga is installed.", logging.info)
        s, o = session.cmd_status_output(cmd_check_pkg)
        return s == 0

    @error_context.context_aware
    def _check_ga_service(self, session, cmd_check_status):
        '''
        Check if the service is started.
        :param session: use for sending cmd
        :param cmd_check_status: cmd to check if ga service is started
        '''
        error_context.context("Check whether qemu-ga service is started.", logging.info)
        s, o = session.cmd_status_output(cmd_check_status)
        return s == 0

    @error_context.context_aware
    def gagent_install(self, session, vm):
        """
        install qemu-ga pkg in guest.
        :param session: use for sending cmd
        :param vm: guest object.
        """
        error_context.context("Try to install 'qemu-guest-agent' package.",
                              logging.info)
        s, o = session.cmd_status_output(self.gagent_install_cmd)
        if s:
            self.test.fail("Could not install qemu-guest-agent package"
                           " in VM '%s', detail: '%s'" % (vm.name, o))

    @error_context.context_aware
    def gagent_uninstall(self, session, vm):
        """
        uninstall qemu-ga pkg in guest.
        :param session: use for sending cmd
        :param vm: guest object.
        """
        error_context.context("Try to uninstall 'qemu-guest-agent' package.",
                              logging.info)
        s, o = session.cmd_status_output(self.gagent_uninstall_cmd)
        if s:
            self.test.fail("Could not uninstall qemu-guest-agent package "
                           "in VM '%s', detail: '%s'" % (vm.name, o))

    @error_context.context_aware
    def gagent_start(self, session, vm):
        """
        Start qemu-guest-agent in guest.
        :param session: use for sending cmd
        :param vm: Virtual machine object.
        """
        error_context.context("Try to start qemu-ga service.", logging.info)
        s, o = session.cmd_status_output(self.params["gagent_start_cmd"])
        # if start a running service, for rhel guest return code is zero,
        # for windows guest,return code is not zero
        if s and "already been started" not in o:
            self.test.fail("Could not start qemu-ga service in VM '%s',"
                           "detail: '%s'" % (vm.name, o))

    @error_context.context_aware
    def gagent_stop(self, session, vm):
        """
        Stop qemu-guest-agent in guest.
        :param session: use for sending cmd
        :param vm: Virtual machine object.
        :param args: Stop cmd.
        """
        error_context.context("Try to stop qemu-ga service.", logging.info)
        s, o = session.cmd_status_output(self.params["gagent_stop_cmd"])
        # if stop a stopped service,for rhel guest return code is zero,
        # for windows guest,return code is not zero.
        if s and "is not started" not in o:
            self.test.fail("Could not stop qemu-ga service in VM '%s', "
                           "detail: '%s'" % (vm.name, o))

    @error_context.context_aware
    def gagent_create(self, params, vm, *args):
        if self.gagent:
            return self.gagent

        error_context.context("Create a QemuAgent object.", logging.info)
        if not (args and isinstance(args, tuple) and len(args) == 2):
            self.test.error("Got invalid arguments for guest agent")

        gagent_serial_type = args[0]
        gagent_name = args[1]

        filename = vm.get_serial_console_filename(gagent_name)
        gagent = guest_agent.QemuAgent(vm, gagent_name, gagent_serial_type,
                                       filename, get_supported_cmds=True)
        self.gagent = gagent

        return self.gagent

    @error_context.context_aware
    def gagent_verify(self, params, vm):
        error_context.context("Check if guest agent work.", logging.info)

        if not self.gagent:
            self.test.error("Could not find guest agent object "
                            "for VM '%s'" % vm.name)

        self.gagent.verify_responsive()
        logging.info(self.gagent.cmd("guest-info"))

    @error_context.context_aware
    def setup(self, test, params, env):
        BaseVirtTest.setup(self, test, params, env)
        if self.start_vm == "yes":
            session = self._get_session(params, self.vm)
            self._open_session_list.append(session)
            if self._check_ga_pkg(session, params.get("gagent_pkg_check_cmd")):
                logging.info("qemu-ga is already installed.")
            else:
                logging.info("qemu-ga is not installed.")
                self.gagent_install(session, self.vm)

            if self._check_ga_service(session, params.get("gagent_status_cmd")):
                logging.info("qemu-ga service is already running.")
            else:
                logging.info("qemu-ga service is not running.")
                self.gagent_start(session, self.vm)

            args = [params.get("gagent_serial_type"), params.get("gagent_name")]
            self.gagent_create(params, self.vm, *args)

    def run_once(self, test, params, env):
        BaseVirtTest.run_once(self, test, params, env)
        if self.start_vm == "yes":
            self.gagent_verify(self.params, self.vm)

    def cleanup(self, test, params, env):
        self._cleanup_open_session()


class QemuGuestAgentBasicCheck(QemuGuestAgentTest):

    def __init__(self, test, params, env):
        QemuGuestAgentTest.__init__(self, test, params, env)

        self.exception_list = []

    def gagent_check_install(self, test, params, env):
        pass

    @error_context.context_aware
    def gagent_check_install_uninstall(self, test, params, env):
        """
        Repeat install/uninstall qemu-ga package in guest

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        repeats = int(params.get("repeat_times", 1))
        logging.info("Repeat install/uninstall qemu-ga pkg for %s times" % repeats)

        if not self.vm:
            self.vm = self.env.get_vm(params["main_vm"])
            self.vm.verify_alive()

        session = self._get_session(params, self.vm)
        for i in range(repeats):
            error_context.context("Repeat: %s/%s" % (i + 1, repeats),
                                  logging.info)
            if self._check_ga_pkg(session, params.get("gagent_pkg_check_cmd")):
                self.gagent_uninstall(session, self.vm)
                self.gagent_install(session, self.vm)
            else:
                self.gagent_install(session, self.vm)
                self.gagent_uninstall(session, self.vm)
        session.close()

    @error_context.context_aware
    def gagent_check_stop_start(self, test, params, env):
        """
        Repeat stop/restart qemu-ga service in guest.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        repeats = int(params.get("repeat_times", 1))
        logging.info("Repeat stop/restart qemu-ga service for %s times" % repeats)

        if not self.vm:
            self.vm = self.env.get_vm(params["main_vm"])
            self.vm.verify_alive()
        session = self._get_session(params, self.vm)
        for i in range(repeats):
            error_context.context("Repeat: %s/%s" % (i + 1, repeats),
                                  logging.info)
            self.gagent_stop(session, self.vm)
            time.sleep(1)
            self.gagent_start(session, self.vm)
            time.sleep(1)
            self.gagent_verify(params, self.vm)
        session.close()

    @error_context.context_aware
    def gagent_check_sync(self, test, params, env):
        """
        Execute "guest-sync" command to guest agent

        Test steps:
        1) Send "guest-sync" command in the host side.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environmen.
        """
        error_context.context("Check guest agent command 'guest-sync'", logging.info)
        self.gagent.sync()

    @error_context.context_aware
    def __gagent_check_shutdown(self, shutdown_mode):
        error_context.context("Check guest agent command 'guest-shutdown'"
                              ", shutdown mode '%s'" % shutdown_mode, logging.info)
        if not self.env or not self.params:
            self.test.error("You should run 'setup' method before test")

        if not (self.vm and self.vm.is_alive()):
            vm = self.env.get_vm(self.params["main_vm"])
            vm.verify_alive()
            self.vm = vm
        self.gagent.shutdown(shutdown_mode)

    def __gagent_check_serial_output(self, pattern):
        start_time = time.time()
        while (time.time() - start_time) < self.vm.REBOOT_TIMEOUT:
            if pattern in self.vm.serial_console.get_output():
                return True
        return False

    def gagent_check_powerdown(self, test, params, env):
        """
        Shutdown guest with guest agent command "guest-shutdown"

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environmen.
        """
        self.__gagent_check_shutdown(self.gagent.SHUTDOWN_MODE_POWERDOWN)
        if not utils_misc.wait_for(self.vm.is_dead, self.vm.REBOOT_TIMEOUT):
            test.fail("Could not shutdown VM via guest agent'")

    @error_context.context_aware
    def gagent_check_reboot(self, test, params, env):
        """
        Reboot guest with guest agent command "guest-shutdown"

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environmen.
        """
        self.__gagent_check_shutdown(self.gagent.SHUTDOWN_MODE_REBOOT)
        pattern = params["gagent_guest_reboot_pattern"]
        error_context.context("Verify serial output has '%s'" % pattern)
        rebooted = self.__gagent_check_serial_output(pattern)
        if not rebooted:
            test.fail("Could not reboot VM via guest agent")
        error_context.context("Try to re-login to guest after reboot")
        try:
            session = self._get_session(self.params, None)
            session.close()
        except Exception as detail:
            test.fail("Could not login to guest"
                      " detail: '%s'" % detail)

    @error_context.context_aware
    def gagent_check_halt(self, test, params, env):
        """
        Halt guest with guest agent command "guest-shutdown"

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environmen.
        """
        self.__gagent_check_shutdown(self.gagent.SHUTDOWN_MODE_HALT)
        pattern = params["gagent_guest_shutdown_pattern"]
        error_context.context("Verify serial output has '%s'" % pattern)
        halted = self.__gagent_check_serial_output(pattern)
        if not halted:
            test.fail("Could not halt VM via guest agent")
        # Since VM is halted, force shutdown it.
        try:
            self.vm.destroy(gracefully=False)
        except Exception as detail:
            logging.warn("Got an exception when force destroying guest:"
                         " '%s'", detail)

    @error_context.context_aware
    def gagent_check_sync_delimited(self, test, params, env):
        """
        Execute "guest-sync-delimited" command to guest agent

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Check guest agent command 'guest-sync-delimited'",
                              logging.info)
        self.gagent.sync("guest-sync-delimited")

    @error_context.context_aware
    def _gagent_verify_password(self, vm, new_password):
        """
        check if the password  works well for the specific user
        """
        vm.wait_for_login(password=new_password)

    @error_context.context_aware
    def gagent_check_set_user_password(self, test, params, env):
        """
        Execute "guest-set-user-password" command to guest agent
        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        old_password = params.get("password", "")
        new_password = params.get("new_password", "123456")
        ga_username = params.get("ga_username", "root")
        crypted = params.get("crypted", "") == "yes"
        error_context.context("Change guest's password.")
        try:
            self.gagent.set_user_password(new_password, crypted, ga_username)
            error_context.context("Check if the guest could be login by new password",
                                  logging.info)
            self._gagent_verify_password(self.vm, new_password)

        except guest_agent.VAgentCmdError:
            test.fail("Failed to set the new password for guest")

        finally:
            error_context.context("Reset back the password of guest", logging.info)
            self.gagent.set_user_password(old_password, username=ga_username)

    @error_context.context_aware
    def gagent_check_get_vcpus(self, test, params, env):
        """
        Execute "guest-get-vcpus" command to guest agent.

        Steps:
        1) Check can-offline field of guest agent.
        2) Check cpu number.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Check can-offline field of guest agent.", logging.info)
        vcpus_info = self.gagent.get_vcpus()
        cpu_num_qga = len(vcpus_info)
        for vcpu in vcpus_info:
            if params.get("os_type") == "linux" and not vcpu["can-offline"]:
                test.fail("Linux guest cpu can't be offline from qga"
                          "which isn't expected.")
            if params.get("os_type") == "windows" and vcpu["can-offline"]:
                test.fail("Windows guest cpu can be offline from qga"
                          "which isn't expected.")

        error_context.context("Check cpu number.", logging.info)
        session = self._get_session(params, self.vm)
        output = session.cmd_output(params["get_cpu_cmd"])
        session.close()

        if params.get("os_type") == "windows":
            cpu_list = output.strip().split('\n')
            cpu_num_guest = sum(map(int, cpu_list))
        else:
            cpu_num_guest = int(output)

        if cpu_num_qga != cpu_num_guest:
            test.fail("CPU number doen't match.\n"
                      "number from guest os is %s,number from guest-agent is %s." %
                      (cpu_num_guest, cpu_num_qga))

    @error_context.context_aware
    def gagent_check_set_vcpus(self, test, params, env):
        """
        Execute "guest-set-vcpus" command to guest agent
        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("get the cpu number of the testing guest")
        vcpus_info = self.gagent.get_vcpus()
        vcpus_num = len(vcpus_info)
        error_context.context("the vcpu number:%d" % vcpus_num, logging.info)
        if vcpus_num < 2:
            test.error("the vpus number of guest should be more than 1")
        vcpus_info[vcpus_num - 1]["online"] = False
        del vcpus_info[vcpus_num - 1]["can-offline"]
        action = {'vcpus': [vcpus_info[vcpus_num - 1]]}
        self.gagent.set_vcpus(action)
        # Check if the result is as expected
        vcpus_info = self.gagent.get_vcpus()
        if vcpus_info[vcpus_num - 1]["online"] is not False:
            test.fail("the vcpu status is not changed as expected")

    @error_context.context_aware
    def gagent_check_get_time(self, test, params, env):
        """
        Execute "guest-get-time" command to guest agent
        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        timeout = float(params.get("login_timeout", 240))
        session = self.vm.wait_for_login(timeout=timeout)
        get_guest_time_cmd = params["get_guest_time_cmd"]
        error_context.context("get the time of the guest", logging.info)
        nanoseconds_time = self.gagent.get_time()
        error_context.context("the time get by guest-get-time is '%d' "
                              % nanoseconds_time, logging.info)
        guest_time = session.cmd_output(get_guest_time_cmd)
        if not guest_time:
            test.error("can't get the guest time for contrast")
        error_context.context("the time get inside guest by shell cmd is '%d' "
                              % int(guest_time), logging.info)
        delta = abs(int(guest_time) - nanoseconds_time / 1000000000)
        if delta > 3:
            test.fail("the time get by guest agent is not the same "
                      "with that by time check cmd inside guest")

    @error_context.context_aware
    def gagent_check_set_time(self, test, params, env):
        """
        Execute "guest-set-time" command to guest agent
        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        timeout = float(params.get("login_timeout", 240))
        session = self.vm.wait_for_login(timeout=timeout)
        get_guest_time_cmd = params["get_guest_time_cmd"]
        error_context.context("get the time of the guest", logging.info)
        guest_time_before = session.cmd_output(get_guest_time_cmd)
        if not guest_time_before:
            test.error("can't get the guest time for contrast")
        error_context.context("the time before being moved back into past  is '%d' "
                              % int(guest_time_before), logging.info)
        # Need to move the guest time one week into the past
        target_time = (int(guest_time_before) - 604800) * 1000000000
        self.gagent.set_time(target_time)
        guest_time_after = session.cmd_output(get_guest_time_cmd)
        error_context.context("the time after being moved back into past  is '%d' "
                              % int(guest_time_after), logging.info)
        delta = abs(int(guest_time_after) - target_time / 1000000000)
        if delta > 3:
            test.fail("the time set for guest is not the same with target")
        # Set the system time from the hwclock
        if params["os_type"] != "windows":
            move_time_cmd = params["move_time_cmd"]
            session.cmd("hwclock -w")
            guest_hwclock_after_set = session.cmd_output("date +%s")
            error_context.context("hwclock is '%d' " % int(guest_hwclock_after_set),
                                  logging.info)
            session.cmd(move_time_cmd)
            time_after_move = session.cmd_output("date +%s")
            error_context.context("the time after move back is '%d' "
                                  % int(time_after_move), logging.info)
            self.gagent.set_time()
            guest_time_after_reset = session.cmd_output(get_guest_time_cmd)
            error_context.context("the time after being reset is '%d' "
                                  % int(guest_time_after_reset), logging.info)
            guest_hwclock = session.cmd_output("date +%s")
            error_context.context("hwclock for compare is '%d' " % int(guest_hwclock),
                                  logging.info)
            delta = abs(int(guest_time_after_reset) - int(guest_hwclock))
            if delta > 3:
                test.fail("The guest time can't be set from hwclock on host")

    @error_context.context_aware
    def gagent_check_time_sync(self, test, params, env):
        """
        Run "guest-set-time" to sync time after stop/cont vm

        Steps:
        1) start windows time service in guest and
        change ntp server to clock.redhat.com
        2) stop vm
        3) wait 3 mins and resume vm
        4) execute "guest-set-time" cmd via qga
        5) query time offset of vm,it should be less than 3 seconds

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        def time_drift():
            """
            Get the time diff between host and guest
            :return: time diff
            """
            host_time = process.system_output("date +%s")
            get_guest_time_cmd = params["get_guest_time_cmd"]
            guest_time = session.cmd_output(get_guest_time_cmd)
            logging.info("Host time is %s,guest time is %s." % (host_time,
                                                                guest_time))
            time_diff = abs(int(host_time) - int(guest_time))
            return time_diff

        time_config_cmd = params["time_service_config"]
        time_service_status_cmd = params["time_service_status_cmd"]
        time_service_start_cmd = params["time_service_start_cmd"]
        time_service_stop_cmd = params["time_service_stop_cmd"]
        session = self._get_session(self.params, self.vm)
        self._open_session_list.append(session)

        error_context.context("Start windows time service.", logging.info)
        if session.cmd_status(time_service_status_cmd):
            session.cmd(time_service_start_cmd)

        error_context.context("Config time resource and restart time"
                              " service.", logging.info)
        session.cmd(time_config_cmd)
        session.cmd(time_service_stop_cmd)
        session.cmd(time_service_start_cmd)

        error_context.context("Stop the VM", logging.info)
        self.vm.pause()
        self.vm.verify_status("paused")

        pause_time = float(params["pause_time"])
        error_context.context("Sleep %s seconds." % pause_time, logging.info)
        time.sleep(pause_time)

        error_context.context("Resume the VM", logging.info)
        self.vm.resume()
        self.vm.verify_status("running")

        time_diff_before = time_drift()
        if time_diff_before < (pause_time - 5):
            test.error("Time is not paused about %s seconds." % pause_time)

        error_context.context("Execute guest-set-time cmd.", logging.info)
        self.gagent.set_time()

        logging.info("Wait a few seconds up to 30s to check guest time.")
        endtime = time.time() + 30
        while time.time() < endtime:
            time.sleep(2)
            time_diff_after = time_drift()
            if time_diff_after < 3:
                break
        else:
            test.fail("The guest time sync failed.")

    @error_context.context_aware
    def _get_mem_used(self, session, cmd):
        """
        get memory usage of the process

        :param session: use for sending cmd
        :param cmd: get details of the process
        """

        output = session.cmd_output(cmd)
        logging.info("The process details: %s" % output)
        try:
            memory_usage = int(output.split(" ")[-2].replace(",", ""))
            return memory_usage
        except Exception:
            raise exceptions.TestError("Get invalid memory usage by "
                                       "cmd '%s' (%s)" % (cmd, output))

    @error_context.context_aware
    def gagent_check_memory_leak(self, test, params, env):
        """
        repeat execute "guest-info" command to guest agent, check memory
        usage of the qemu-ga

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """

        timeout = float(params.get("login_timeout", 240))
        test_command = params.get("test_command", "guest-info")
        memory_usage_cmd = params.get("memory_usage_cmd",
                                      "tasklist | findstr /I qemu-ga.exe")
        session = self.vm.wait_for_login(timeout=timeout)
        error_context.context("get the memory usage of qemu-ga before run '%s'" %
                              test_command, logging.info)
        memory_usage_before = self._get_mem_used(session, memory_usage_cmd)
        session.close()
        repeats = int(params.get("repeats", 1))
        for i in range(repeats):
            error_context.context("execute '%s' %s times" % (test_command, i + 1),
                                  logging.info)
            return_msg = self.gagent.guest_info()
            logging.info(str(return_msg))
        self.vm.verify_alive()
        error_context.context("get the memory usage of qemu-ga after run '%s'" %
                              test_command, logging.info)
        session = self.vm.wait_for_login(timeout=timeout)
        memory_usage_after = self._get_mem_used(session, memory_usage_cmd)
        session.close()
        # less than 500K is acceptable.
        if memory_usage_after - memory_usage_before > 500:
            test.fail("The memory usages are different, "
                      "before run command is %skb and "
                      "after run command is %skb" % (memory_usage_before,
                                                     memory_usage_after))

    @error_context.context_aware
    def gagent_check_fstrim(self, test, params, env):
        """
        Execute "guest-fstrim" command to guest agent
        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.

        """
        def get_host_scsi_disk():
            """
            Get latest scsi disk which enulated by scsi_debug module
            Return the device name and the id in host
            """
            scsi_disk_info = process.system_output(
                avo_path.find_command('lsscsi'), shell=True)
            scsi_disk_info = scsi_disk_info.decode().splitlines()
            scsi_debug = [_ for _ in scsi_disk_info if 'scsi_debug' in _][-1]
            scsi_debug = scsi_debug.split()
            host_id = scsi_debug[0][1:-1]
            device_name = scsi_debug[-1]
            return (host_id, device_name)

        def get_guest_discard_disk(session):
            """
            Get disk without partitions in guest.
            """
            list_disk_cmd = "ls /dev/[sh]d*|sed 's/[0-9]//p'|uniq -u"
            disk = session.cmd_output(list_disk_cmd).splitlines()[0]
            return disk

        def get_provisioning_mode(device, host_id):
            """
            Get disk provisioning mode, value usually is 'writesame_16',
            depends on params for scsi_debug module.
            """
            device_name = os.path.basename(device)
            path = "/sys/block/%s/device/scsi_disk" % device_name
            path += "/%s/provisioning_mode" % host_id
            return genio.read_one_line(path).strip()

        def get_allocation_bitmap():
            """
            get block allocation bitmap
            """
            path = "/sys/bus/pseudo/drivers/scsi_debug/map"
            try:
                return genio.read_one_line(path).strip()
            except IOError:
                logging.warn("could not get bitmap info, path '%s' is "
                             "not exist", path)
            return ""

        for vm in env.get_all_vms():
            if vm:
                vm.destroy()
                env.unregister_vm(vm.name)
        host_id, disk_name = get_host_scsi_disk()
        provisioning_mode = get_provisioning_mode(disk_name, host_id)
        logging.info("Current provisioning_mode = '%s'", provisioning_mode)
        bitmap = get_allocation_bitmap()
        if bitmap:
            logging.debug("block allocation bitmap: %s" % bitmap)
            test.error("block allocation bitmap not empty before test.")
        vm_name = params["main_vm"]
        test_image = "scsi_debug"
        params["start_vm"] = "yes"
        params["image_name_%s" % test_image] = disk_name
        params["image_format_%s" % test_image] = "raw"
        params["image_raw_device_%s" % test_image] = "yes"
        params["force_create_image_%s" % test_image] = "no"
        params["drive_format_%s" % test_image] = "scsi-block"
        params["drv_extra_params_%s" % test_image] = "discard=on"
        params["images"] = " ".join([params["images"], test_image])

        error_context.context("boot guest with disk '%s'" % disk_name, logging.info)
        env_process.preprocess_vm(test, params, env, vm_name)

        self.initialize(test, params, env)
        self.setup(test, params, env)
        timeout = float(params.get("login_timeout", 240))
        session = self.vm.wait_for_login(timeout=timeout)
        device_name = get_guest_discard_disk(session)

        error_context.context("format disk '%s' in guest" % device_name, logging.info)
        format_disk_cmd = params["format_disk_cmd"]
        format_disk_cmd = format_disk_cmd.replace("DISK", device_name)
        session.cmd(format_disk_cmd)

        error_context.context("mount disk with discard options '%s'" % device_name,
                              logging.info)
        mount_disk_cmd = params["mount_disk_cmd"]
        mount_disk_cmd = mount_disk_cmd.replace("DISK", device_name)
        session.cmd(mount_disk_cmd)

        error_context.context("write the disk with dd command", logging.info)
        write_disk_cmd = params["write_disk_cmd"]
        session.cmd(write_disk_cmd)

        error_context.context("Delete the file created before on disk", logging.info)
        delete_file_cmd = params["delete_file_cmd"]
        session.cmd(delete_file_cmd)

        # check the bitmap before trim
        bitmap_before_trim = get_allocation_bitmap()
        if not re.match(r"\d+-\d+", bitmap_before_trim):
            test.fail("didn't get the bitmap of the target disk")
        error_context.context("the bitmap_before_trim is %s" % bitmap_before_trim,
                              logging.info)
        total_block_before_trim = abs(sum([eval(i) for i in
                                           bitmap_before_trim.split(',')]))
        error_context.context("the total_block_before_trim is %d"
                              % total_block_before_trim, logging.info)

        error_context.context("execute the guest-fstrim cmd", logging.info)
        self.gagent.fstrim()

        # check the bitmap after trim
        bitmap_after_trim = get_allocation_bitmap()
        if not re.match(r"\d+-\d+", bitmap_after_trim):
            test.fail("didn't get the bitmap of the target disk")
        error_context.context("the bitmap_after_trim is %s" % bitmap_after_trim,
                              logging.info)
        total_block_after_trim = abs(sum([eval(i) for i in
                                          bitmap_after_trim.split(',')]))
        error_context.context("the total_block_after_trim is %d"
                              % total_block_after_trim, logging.info)

        if total_block_after_trim > total_block_before_trim:
            test.fail("the bitmap_after_trim is lager, the command"
                      "guest-fstrim may not work")
        if self.vm:
            self.vm.destroy()

    @error_context.context_aware
    def gagent_check_get_interfaces(self, test, params, env):
        """
        Execute "guest-network-get-interfaces" command to guest agent

        Steps:
        1) login guest with serial session
        2) get the available interface name via mac address
        3) check the available interface name is the same with guest
        4) check ip address is the same with guest
        5) create a bridge interface for linux guest and check it
           from guest agent;
           disable interface for windows guest and check it
           from guest agent
        6) check "guest-network-get-interfaces" result
        7) recover the interfaces
        8) change ip address
        9) check "guest-network-get-interfaces" result

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        def get_interface(ret_list, mac_addr):
            """
            Get the available interface name.

            :return: interface name and the interface's index in ret_list
            """
            interface_name = ""
            if_index = 0
            for interface in ret_list:
                if "hardware-address" in interface and \
                                interface["hardware-address"] == mac_addr:
                    interface_name = interface["name"]
                    break
                if_index += 1
            return interface_name, if_index

        def ip_addr_check(session, mac_addr, ret_list, if_index, if_name):
            """
            Check the ip address from qga and guest inside.

            :param session: serial session
            :param mac_addr: mac address of nic
            :param ret_list: return list from qg
            :param if_index: the interface's index in ret
            :param if_name: interface name
            """
            guest_ip_ipv4 = utils_net.get_guest_ip_addr(session, mac_addr,
                                                        os_type)
            guest_ip_ipv6 = utils_net.get_guest_ip_addr(session, mac_addr,
                                                        os_type,
                                                        ip_version="ipv6",
                                                        linklocal=True)
            ip_lists = ret_list[if_index]["ip-addresses"]
            for ip in ip_lists:
                if ip["ip-address-type"] == "ipv4":
                    ip_addr_qga_ipv4 = ip["ip-address"]
                elif ip["ip-address-type"] == "ipv6":
                    ip_addr_qga_ipv6 = ip["ip-address"].split("%")[0]
                else:
                    test.fail("The ip address type is %s, but it should be"
                              " ipv4 or ipv6." % ip["ip-address-type"])
            if guest_ip_ipv4 != ip_addr_qga_ipv4 \
                    or guest_ip_ipv6 != ip_addr_qga_ipv6:
                test.fail("Get the wrong ip address for %s interface:\n"
                          "ipv4 address from qga is %s, the expected is %s;\n"
                          "ipv6 address from qga is %s, the expected is %s."
                          % (if_name, ip_addr_qga_ipv4,
                             guest_ip_ipv4, ip_addr_qga_ipv6,
                             guest_ip_ipv6))

        session_serial = self.vm.wait_for_serial_login()
        mac_addr = self.vm.get_mac_address()
        os_type = self.params["os_type"]

        error_context.context("Get the available interface name via"
                              " guest-network-get-interfaces cmd.",
                              logging.info)
        ret = self.gagent.get_network_interface()
        if_name, if_index = get_interface(ret, mac_addr)
        if not if_name:
            test.fail("Did not get the expected interface,"
                      " the network info is \n%s." % ret)

        error_context.context("Check the available interface name %s"
                              " via qga." % if_name, logging.info)
        if os_type == "linux":
            if_name_guest = utils_net.get_linux_ifname(session_serial,
                                                       mac_addr)
        else:
            if_name_guest = utils_net.get_windows_nic_attribute(
                session_serial, "macaddress", mac_addr, "netconnectionid")
        if if_name != if_name_guest:
            test.fail("Get the wrong interface name, value from qga is: %s; "
                      "the expected is: %s" % (if_name, if_name_guest))

        error_context.context("Check ip address via qga.", logging.info)
        ip_addr_check(session_serial, mac_addr, ret, if_index, if_name)

        # create a bridge interface for linux guest and check it
        #  from guest agent
        # disable interface for windows guest and check it
        #  from guest agent
        if os_type == "linux":
            error_context.context("Create a new bridge in guest and check the"
                                  "result from qga.", logging.info)
            add_brige_cmd = "ip link add name br0 type bridge"
            session_serial.cmd(add_brige_cmd)
            interfaces_after_add = self.gagent.get_network_interface()
            for interface in interfaces_after_add:
                if interface["name"] == "br0":
                    break
            else:
                test.fail("The new bridge is not checked from guest agent.")
            error_context.context("Delete the added bridge.", logging.info)
            del_brige_cmd = "ip link del br0"
            session_serial.cmd(del_brige_cmd)
        else:
            error_context.context("Set down the interface in windows guest.",
                                  logging.info)
            utils_net.disable_windows_guest_network(session_serial, if_name)
            ret_after_down = self.gagent.get_network_interface()
            if_name_down = get_interface(ret_after_down, mac_addr)[0]
            if if_name_down:
                test.fail("From qga result that the interface is still"
                          " enabled, detailed info is:\n %s"
                          % ret_after_down)
            error_context.context("Set up the interface in guest.",
                                  logging.info)
            utils_net.enable_windows_guest_network(session_serial, if_name)

        error_context.context("Change ipv4 address and check the result "
                              "from qga.", logging.info)
        # for linux guest, need to delete ip address first
        if os_type == "linux":
            ip_lists = ret[if_index]["ip-addresses"]
            for ip in ip_lists:
                if ip["ip-address-type"] == "ipv4":
                    ip_addr_qga_ipv4 = ip["ip-address"]
                    break
            session_serial.cmd("ip addr del %s dev %s" % (ip_addr_qga_ipv4,
                                                          if_name))
        utils_net.set_guest_ip_addr(session_serial, mac_addr, "192.168.10.10",
                                    os_type=os_type)
        ret_ip_change = self.gagent.get_network_interface()
        if_name_ip_change, if_index_ip_change = get_interface(
            ret_ip_change, mac_addr)
        ip_addr_check(session_serial, mac_addr, ret_ip_change,
                      if_index_ip_change, if_name_ip_change)

        if session_serial:
            session_serial.close()

    @error_context.context_aware
    def gagent_check_reboot_shutdown(self, test, params, env):
        """
        Send "shutdown,reboot" command to guest agent
        after FS freezed
        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        vm = env.get_vm(params["main_vm"])
        vm.verify_alive()
        gagent = self.gagent
        gagent.fsfreeze()
        try:
            for mode in (gagent.SHUTDOWN_MODE_POWERDOWN, gagent.SHUTDOWN_MODE_REBOOT):
                try:
                    gagent.shutdown(mode)
                except guest_agent.VAgentCmdError as detail:
                    if not re.search('guest-shutdown has been disabled', str(detail)):
                        test.fail("This is not the desired information: ('%s')" % str(detail))
                else:
                    test.fail("agent shutdown command shouldn't succeed for freeze FS")
        finally:
            try:
                gagent.fsthaw(check_status=False)
            except Exception:
                pass

    def _change_bl(self, session):
        """
        Some cmds are in blacklist by default,so need to change.
        Now only linux guest has this behavior,but still leave interface
        for windows guest.
        """
        if self.params.get("os_type") == "linux":
            black_list = self.params["black_list"]
            for black_cmd in black_list.split():
                bl_check_cmd = self.params["black_list_check_cmd"] % black_cmd
                bl_change_cmd = self.params["black_list_change_cmd"] % black_cmd
                session.cmd(bl_change_cmd)
                output = session.cmd_output(bl_check_cmd)
                if not output == "":
                    self.test.fail("Failed to change the cmd to "
                                   "white list, the output is %s" % output)

            s, o = session.cmd_status_output(self.params["gagent_restart_cmd"])
            if s:
                self.test.fail("Could not restart qemu-ga in VM after changing"
                               " list, detail: %s" % o)

    def _read_check(self, ret_handle, content, count=None):
        """
        Read file and check if the content read is correct.

        :param ret_handle: file handle returned by guest-file-open
        :param count: maximum number of bytes to read
        :param content: expected content
        """
        logging.info("Read content and do check.")
        ret_read = self.gagent.guest_file_read(ret_handle, count=count)
        content_read = base64.b64decode(ret_read["buf-b64"]).decode()
        logging.info("The read content is '%s'; the real content is '%s'."
                     % (content_read, content))
        if not content_read.strip() == content.strip():
            self.test.fail("The read content is '%s'; the real content is '%s'."
                           % (content_read, content))

    def _guest_file_prepare(self):
        """
        Preparation for gagent_check_file_xxx function.
        :return: vm session and guest file full path
        """
        session = self._get_session(self.params, self.vm)
        self._open_session_list.append(session)
        logging.info("Change guest-file related cmd to white list.")
        self._change_bl(session)

        ranstr = utils_misc.generate_random_string(5)
        file_name = "qgatest" + ranstr
        guest_file = "%s%s" % (self.params["file_path"], file_name)
        return session, guest_file

    @error_context.context_aware
    def gagent_check_file_seek(self, test, params, env):
        """
        Guest-file-seek cmd test.

        Test steps:
        1) create new guest file in guest.
        2) write "hello world" to guest file.
        3) seek test
          a.seek from the file beginning position and offset is 0
           ,and read two count
          b. seek from the file beginning position and offset is 0,
           read two bytes.
          c. seek from current position and offset is 2,read 5 bytes.
          d. seek from the file end and offset is -5,read 3 bytes.
        4) close the handle

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Change guest-file related cmd to white list"
                              " and get guest file name.")
        session, tmp_file = self._guest_file_prepare()

        error_context.context("Write content to file.", logging.info)
        content = "hello world\n"
        ret_handle = int(self.gagent.guest_file_open(tmp_file, mode="w+"))
        self.gagent.guest_file_write(ret_handle, content)
        self.gagent.guest_file_flush(ret_handle)

        error_context.context("Seek to one position and read file with "
                              "file-seek/read cmd.", logging.info)
        self.gagent.guest_file_seek(ret_handle, 0, 0)
        self._read_check(ret_handle, content)

        logging.info("Seek the position to file beginning and read all.")
        self.gagent.guest_file_seek(ret_handle, 0, 0)
        self._read_check(ret_handle, "he", 2)

        logging.info("Seek the position to file beginning, offset is 2, and read 2 bytes.")
        self.gagent.guest_file_seek(ret_handle, 2, 0)
        self._read_check(ret_handle, "ll", 2)

        logging.info("Seek to current position, offset is 2 and read 5 byte.")
        self.gagent.guest_file_seek(ret_handle, 2, 1)
        self._read_check(ret_handle, "world", 5)

        logging.info("Seek from the file end position, offset is -5 and "
                     "read 3 byte.")
        self.gagent.guest_file_seek(ret_handle, -5, 2)
        self._read_check(ret_handle, "orl", 3)

        self.gagent.guest_file_close(ret_handle)
        cmd_del_file = "%s %s" % (params["cmd_del"], tmp_file)
        session.cmd(cmd_del_file)

    @error_context.context_aware
    def gagent_check_file_write(self, test, params, env):
        """
        Guest-file-write cmd test.

        Test steps:
        1) write two counts bytes to guest file.
        2) write ten counts bytes to guest file from the file end.
        3) write more than all counts bytes to guest file.
        4) close the handle

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Change guest-file related cmd to white list"
                              " and get guest file name.")
        session, tmp_file = self._guest_file_prepare()

        error_context.context("Create new file with mode 'w' and do file"
                              " write test", logging.info)
        ret_handle = int(self.gagent.guest_file_open(tmp_file, mode="w+"))
        content = "hello world\n"
        content_check = ""
        for cnt in range(1, 10, 2):
            error_context.context("Write %s bytes to guest file."
                                  % cnt, logging.info)
            self.gagent.guest_file_seek(ret_handle, 0, 2)
            self.gagent.guest_file_write(ret_handle, content, cnt)
            self.gagent.guest_file_flush(ret_handle)
            self.gagent.guest_file_seek(ret_handle, 0, 0)
            content_check += content[: int(cnt)]
            self._read_check(ret_handle, content_check)

        error_context.context("Write more than all counts bytes to"
                              " guest file.", logging.info)
        try:
            self.gagent.guest_file_write(ret_handle, content, 15)
        except guest_agent.VAgentCmdError as e:
            expected = "invalid for argument count"
            if expected not in e.edata["desc"]:
                self.test.fail(e)
        else:
            self.test.fail("Cmd 'guest-file-write' is executed "
                           "successfully after freezing FS! "
                           "But it should return error.")
        self.gagent.guest_file_close(ret_handle)
        cmd_del_file = "%s %s" % (params["cmd_del"], tmp_file)
        session.cmd(cmd_del_file)

    @error_context.context_aware
    def gagent_check_file_read(self, test, params, env):
        """
        Guest-file-read cmd test.

        Test steps:
        1) create a file in guest.
        2) read the file via qga command and check the result.
        3) create a big file in guest.
        4) Read the big file with an invalid count number.
        5) Read the big file with big count number.
        6) Open a none existing file of guest.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Change guest-file related cmd to white list"
                              " and get guest file name.")
        session, tmp_file = self._guest_file_prepare()
        content = "helloworld\n"

        error_context.context("Create a new small file in guest", logging.info)
        cmd_create_file = "echo helloworld > %s" % tmp_file
        session.cmd(cmd_create_file)
        error_context.context("Open guest file via guest-file-open with"
                              " read only mode.", logging.info)
        # default is read mode
        ret_handle = int(self.gagent.guest_file_open(tmp_file))
        error_context.context("Read the content and check the result via"
                              " guest-file cmd", logging.info)
        self._read_check(ret_handle, content)
        self.gagent.guest_file_close(ret_handle)

        error_context.context("Create a 200KB file in guest", logging.info)
        process.run("dd if=/dev/urandom of=/tmp/big_file bs=1024 count=200")
        self.vm.copy_files_to("/tmp/big_file", tmp_file)

        error_context.context("Open the big guest file via guest-file-open with"
                              " read only mode.", logging.info)
        ret_handle = int(self.gagent.guest_file_open(tmp_file))

        error_context.context("Read the big file with an invalid count number",
                              logging.info)
        try:
            self.gagent.guest_file_read(ret_handle, count=10000000000)
        except guest_agent.VAgentCmdError as detail:
            if not re.search("invalid for argument count", str(detail)):
                test.fail("Return error but is not the desired information: "
                          "('%s')" % str(detail))
        else:
            test.fail("Did not get the expected result.")

        error_context.context("Read the file with an valid big count number.",
                              logging.info)
        self.gagent.guest_file_seek(ret_handle, 0, 0)
        # if guest os resource is enough, will return no error.
        # else it will return error like "insufficient system resource"
        # which is expected
        try:
            self.gagent.guest_file_read(ret_handle, count=1000000000)
        except guest_agent.VAgentCmdError as detail:
            info_insuffi = "Insufficient system resources exist to"
            info_insuffi += " complete the requested service"
            if not re.search(info_insuffi, str(detail)):
                test.fail("Return error but is not the desired information: "
                          "('%s')" % str(detail))
        self.gagent.guest_file_close(ret_handle)

        error_context.context("Open a none existing file with read only mode.",
                              logging.info)
        try:
            self.gagent.guest_file_open("none_exist_file")
        except guest_agent.VAgentCmdError as detail:
            res_linux = "No such file or directory"
            res_windows = "system cannot find the file"
            if res_windows not in str(detail) and res_linux not in str(detail):
                test.fail("This is not the desired information: "
                          "('%s')" % str(detail))
        else:
            test.fail("Should not pass with none existing file.")

        cmd_del_file = "%s %s" % (params["cmd_del"], tmp_file)
        session.cmd(cmd_del_file)

    @error_context.context_aware
    def gagent_check_with_fsfreeze(self, test, params, env):
        """
        Try to operate guest file when fs freeze.

        Test steps:
        1) freeze fs and try to open guest file with qga cmd.
        2) after thaw fs, try to operate guest file with qga cmd.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Change guest-file related cmd to white list"
                              " and get guest file name.")
        session, tmp_file = self._guest_file_prepare()

        content = "hello world\n"
        error_context.context("Freeze fs and try to open guest file.",
                              logging.info)
        self.gagent.fsfreeze()
        try:
            self.gagent.guest_file_open(tmp_file, mode="a+")
        except guest_agent.VAgentCmdError as detail:
            if not re.search('guest-file-open has been disabled',
                             str(detail)):
                self.test.fail("This is not the desired information: "
                               "('%s')" % str(detail))
        else:
            self.test.fail("guest-file-open command shouldn't succeed "
                           "for freeze FS.")
        finally:
            self.gagent.fsthaw()

        error_context.context("After thaw fs, try to operate guest"
                              " file.", logging.info)
        ret_handle = int(self.gagent.guest_file_open(tmp_file, mode="a+"))
        self.gagent.guest_file_write(ret_handle, content)
        self.gagent.guest_file_flush(ret_handle)
        self.gagent.guest_file_seek(ret_handle, 0, 0)
        self._read_check(ret_handle, "hello world")
        self.gagent.guest_file_close(ret_handle)
        cmd_del_file = "%s %s" % (params["cmd_del"], tmp_file)
        session.cmd(cmd_del_file)

    @error_context.context_aware
    def gagent_check_guest_exec(self, test, params, env):
        """
        Execute a command in the guest via guest-exec cmd,
        and check status of this process.

        Steps:
        1) Change guest-exec related cmd to white list,linux guest only.
        2) Execute guest cmd and get the output.
        3) Check the cmd's result and output from return.
        4) Execute guest cmd and no need to get the output.
        5) Check the cmd's result from return.
        6) Issue an invalid guest cmd.
        7) Check the return result.
        8) Execute guest cmd with wrong args.
        9) Check the return result.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        """

        def _guest_cmd_run(guest_cmd, cmd_args=None, env_qga=None,
                           input=None, capture_output=None):
            """
            Execute guest-exec cmd and get the result in timeout.

            :param guest_cmd: path or executable name to execute
            :param cmd_args: argument list to pass to executable
            :param env_qga: environment variables to pass to executable
            :param input: data to be passed to process stdin (base64 encoded)
            :param capture_output: bool flag to enable capture of stdout/stderr
                                   of running process,defaults to false.
            :return: result of guest-exec cmd
            """

            # change cmd_args to be a list needed by guest-exec.
            if cmd_args:
                cmd_args = cmd_args.split()
            ret = self.gagent.guest_exec(path=guest_cmd, arg=cmd_args,
                                         env=env_qga, input_data=input,
                                         capture_output=capture_output)
            end_time = time.time() + float(params["guest_cmd_timeout"])
            while time.time() < end_time:
                result = self.gagent.guest_exec_status(ret["pid"])
                if result["exited"]:
                    logging.info("Guest cmd is finished.")
                    break
                time.sleep(5)

            if not result["exited"]:
                test.error("Guest cmd is still running, pls login guest to"
                           " handle it or extend your timeout.")
            # check the exitcode and output/error data result
            if result["exitcode"] == 0:
                if "out-data" in result:
                    out_data = base64.b64decode(result["out-data"]).decode()
                    logging.info("The guest cmd is executed successfully,"
                                 "the output is: \n %s." % out_data)
                elif "err-data" in result:
                    test.fail("When exitcode is 0, should not get error data.")
            else:
                if "out-data" in result:
                    test.fail("When exitcode is 1, should not get output data.")
                elif "err-data" in result:
                    err_data = base64.b64decode(result["err-data"]).decode()
                    logging.info("The guest cmd failed,"
                                 "the error info is: \n %s" % err_data)
            return result

        session = self._get_session(params, self.vm)
        self._open_session_list.append(session)

        error_context.context("Change guest-exec related cmd to white list.",
                              logging.info)
        self._change_bl(session)

        guest_cmd = params["guest_cmd"]
        guest_cmd_args = params["guest_cmd_args"]

        error_context.context("Execute guest cmd and get the output.",
                              logging.info)
        result = _guest_cmd_run(guest_cmd=guest_cmd, cmd_args=guest_cmd_args,
                                capture_output=True)

        if "out-data" not in result and "err-data" not in result:
            test.fail("There is no output in result.")

        error_context.context("Execute guest cmd and no need to get the output.",
                              logging.info)
        result = _guest_cmd_run(guest_cmd=guest_cmd, cmd_args=guest_cmd_args)

        if "out-data" in result or "err-data" in result:
            test.fail("There is output in result which is not expected.")

        error_context.context("Invalid guest cmd test.", logging.info)
        try:
            self.gagent.guest_exec(path="invalid_cmd")
        except guest_agent.VAgentCmdError as detail:
            if not re.search('Failed to execute child process', str(detail)):
                test.fail("This is not the desired information: ('%s')"
                          % str(detail))
        else:
            test.fail("Should not success for invalid cmd.")

        error_context.context("Execute guest cmd with wrong args.", logging.info)
        if params.get("os_type") == "linux":
            guest_cmd = "cd"
            guest_cmd_args = "/tmp/qga_empty_dir"
        else:
            guest_cmd = "ping"
            guest_cmd_args = "invalid-address"
        result = _guest_cmd_run(guest_cmd=guest_cmd, cmd_args=guest_cmd_args,
                                capture_output=True)
        if result["exitcode"] == 0:
            test.fail("The cmd should be failed with wrong args.")

    @error_context.context_aware
    def _action_before_fsfreeze(self, *args):
        session = self._get_session(self.params, None)
        self._open_session_list.append(session)

    @error_context.context_aware
    def _action_after_fsfreeze(self, *args):
        error_context.context("Verfiy FS is frozen in guest.", logging.info)

        if not self._open_session_list:
            self.test.error("Could not find any opened session")
        # Use the last opened session to send cmd.
        session = self._open_session_list[-1]

        try:
            session.cmd(args[0], args[1])
        except aexpect.ShellTimeoutError:
            logging.info("FS is frozen as expected,can't write in guest.")
        else:
            self.test.fail("FS is not frozen,still can write in guest.")

    @error_context.context_aware
    def _action_before_fsthaw(self, *args):
        pass

    @error_context.context_aware
    def _action_after_fsthaw(self, *args):
        error_context.context("Verify FS is thawed in guest.", logging.info)

        if not self._open_session_list:
            session = self._get_session(self.params, None)
            self._open_session_list.append(session)
        # Use the last opened session to send cmd.
        session = self._open_session_list[-1]
        try:
            session.cmd(args[0], args[1])
        except aexpect.ShellTimeoutError:
            self.test.fail("FS is not thawed, still can't write in guest.")
        else:
            logging.info("FS is thawed as expected, can write in guest.")

    @error_context.context_aware
    def gagent_check_fsfreeze(self, test, params, env):
        """
        Test guest agent commands "guest-fsfreeze-freeze/status/thaw"

        Test steps:
        1) Check the FS is thawed.
        2) Freeze the FS.
        3) Check the FS is frozen from both guest agent side and guest os side.
        4) Thaw the FS.
        5) Check the FS is unfrozen from both guest agent side and guest os side.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environmen.
        """
        error_context.context("Check guest agent command "
                              "'guest-fsfreeze-freeze/thaw'",
                              logging.info)
        write_cmd = params.get("gagent_fs_test_cmd", "")
        write_cmd_timeout = int(params.get("write_cmd_timeout", 60))
        try:
            expect_status = self.gagent.FSFREEZE_STATUS_THAWED
            self.gagent.verify_fsfreeze_status(expect_status)
        except guest_agent.VAgentFreezeStatusError:
            # Thaw guest FS if the fs status is incorrect.
            self.gagent.fsthaw(check_status=False)

        self._action_before_fsfreeze()
        error_context.context("Freeze the FS.", logging.info)
        self.gagent.fsfreeze()
        try:
            self._action_after_fsfreeze(write_cmd, write_cmd_timeout)
            # Next, thaw guest fs.
            self._action_before_fsthaw()
            error_context.context("Thaw the FS.", logging.info)
            self.gagent.fsthaw()
        except Exception:
            # Thaw fs finally, avoid problem in following cases.
            try:
                self.gagent.fsthaw(check_status=False)
            except Exception as detail:
                # Ignore exception for this thaw action.
                logging.warn("Finally failed to thaw guest fs,"
                             " detail: '%s'", detail)
            raise

        self._action_after_fsthaw(write_cmd, write_cmd_timeout)

    @error_context.context_aware
    def gagent_check_thaw_unfrozen(self, test, params, env):
        """
        Thaw the unfrozen fs

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Verify if FS is thawed", logging.info)
        expect_status = self.gagent.FSFREEZE_STATUS_THAWED
        if self.gagent.get_fsfreeze_status() != expect_status:
            # Thaw guest FS if the fs status isn't thawed.
            self.gagent.fsthaw()
        error_context.context("Thaw the unfrozen FS", logging.info)
        ret = self.gagent.fsthaw(check_status=False)
        if ret != 0:
            test.fail("The return value of thawing an unfrozen fs is %s,"
                      "it should be zero" % ret)

    @error_context.context_aware
    def gagent_check_freeze_frozen(self, test, params, env):
        """
        Freeze the frozen fs

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        self.gagent.fsfreeze()
        error_context.context("Freeze the frozen FS", logging.info)
        try:
            self.gagent.fsfreeze(check_status=False)
        except guest_agent.VAgentCmdError as e:
            expected = ("The command guest-fsfreeze-freeze has been disabled "
                        "for this instance")
            if expected not in e.edata["desc"]:
                test.fail(e)
        else:
            test.fail("Cmd 'guest-fsfreeze-freeze' is executed successfully "
                      "after freezing FS! But it should return error.")
        finally:
            if self.gagent.get_fsfreeze_status() == self.gagent.FSFREEZE_STATUS_FROZEN:
                self.gagent.fsthaw(check_status=False)

    @error_context.context_aware
    def gagent_check_after_init(self, test, params, env):
        """
        Check guest agent service status after running the init command
        :param test: Kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        error_context.context("Run init 3 in guest", logging.info)
        session = self._get_session(params, self.vm)
        session.cmd("init 3")
        error_context.context("Check guest agent status after running init 3",
                              logging.info)
        if self._check_ga_service(session, params.get("gagent_status_cmd")):
            logging.info("Guest agent service is still running after init 3.")
        else:
            test.fail("Guest agent service is stopped after running init 3! It "
                      "should be running.")

    @error_context.context_aware
    def gagent_check_hotplug_frozen(self, test, params, env):
        """
        hotplug device with frozen fs

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        def get_new_disk(disks_before_plug, disks_after_plug):
            """
            Get the new added disks by comparing two disk lists.
            """
            disk = list(set(disks_after_plug).difference(set(disks_before_plug)))
            return disk

        session = self._get_session(params, self.vm)
        image_size_stg0 = params["image_size_stg0"]
        try:
            if params.get("os_type") == "linux":
                disks_before_plug = utils_disk.get_linux_disks(session, True)
            error_context.context("Freeze guest fs", logging.info)
            self.gagent.fsfreeze()
            # For linux guest, waiting for it to be frozen, for windows guest,
            # waiting for it to be automatically thawed.
            time.sleep(20)
            error_context.context("Hotplug a disk to guest", logging.info)
            image_name_plug = params["images"].split()[1]
            image_params_plug = params.object_params(image_name_plug)
            devs = self.vm.devices.images_define_by_params(image_name_plug,
                                                           image_params_plug,
                                                           'disk')
            for dev in devs:
                self.vm.devices.simple_hotplug(dev, self.vm.monitor)
            disk_write_cmd = params["disk_write_cmd"]
            pause = float(params.get("virtio_block_pause", 10.0))
            error_context.context("Format and write disk", logging.info)
            if params.get("os_type") == "linux":
                new_disks = utils_misc.wait_for(lambda: get_new_disk(disks_before_plug.keys(),
                                                utils_disk.get_linux_disks(session, True).keys()), pause)
                if not new_disks:
                    test.fail("Can't detect the new hotplugged disks in guest")
                try:
                    mnt_point = utils_disk.configure_empty_disk(
                        session, new_disks[0], image_size_stg0, "linux", labeltype="msdos")
                except aexpect.ShellTimeoutError:
                    self.gagent.fsthaw()
                    mnt_point = utils_disk.configure_empty_disk(
                        session, new_disks[0], image_size_stg0, "linux", labeltype="msdos")
            elif params.get("os_type") == "windows":
                disk_index = utils_misc.wait_for(
                    lambda: utils_disk.get_windows_disks_index(session, image_size_stg0), 120)
                if disk_index:
                    logging.info("Clear readonly for disk and online it in windows guest.")
                    if not utils_disk.update_windows_disk_attributes(session, disk_index):
                        test.error("Failed to update windows disk attributes.")
                    mnt_point = utils_disk.configure_empty_disk(
                        session, disk_index[0], image_size_stg0, "windows", labeltype="msdos")
            session.cmd(disk_write_cmd % mnt_point[0])
            error_context.context("Unplug the added disk", logging.info)
            self.vm.devices.simple_unplug(devs[0], self.vm.monitor)
        finally:
            if self.gagent.get_fsfreeze_status() == self.gagent.FSFREEZE_STATUS_FROZEN:
                try:
                    self.gagent.fsthaw(check_status=False)
                except guest_agent.VAgentCmdError as detail:
                    if not re.search("fsfreeze is limited up to 10 seconds", str(detail)):
                        test.error("guest-fsfreeze-thaw cmd failed with:"
                                   "('%s')" % str(detail))
            self.vm.verify_alive()
            if params.get("os_type") == "linux":
                utils_disk.umount(new_disks[0], mnt_point[0], session=session)
            session.close()

    @error_context.context_aware
    def gagent_check_path_fsfreeze_hook(self, test, params, env):
        """
        Check if the default path of fsfreeze-hook is correct

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        session = self._get_session(params, self.vm)
        self.gagent_stop(session, self.vm)
        error_context.context("Start gagent with -F option", logging.info)
        self.gagent_start(session, self.vm)
        gagent_path_cmd = params["gagent_path_cmd"]
        error_context.context("Check if default path of fsfreeze-hook is in "
                              "output of %s" % gagent_path_cmd, logging.info)
        s, o = session.cmd_status_output(params["gagent_help_cmd"])
        help_cmd_output = o.strip().replace(')', '').split()[-1]
        s, o = session.cmd_status_output(gagent_path_cmd)
        if help_cmd_output in o:
            logging.info("The default path for script 'fsfreeze-hook' is "
                         "in output of %s." % gagent_path_cmd)
            error_context.context("Execute 'guest-fsfreeze-freeze'", logging.info)
            self.gagent.fsfreeze()
            self.gagent.fsthaw()
        else:
            test.fail("The default path of fsfreeze-hook doesn't match with expectation.")

    @error_context.context_aware
    def gagent_check_query_chardev(self, test, params, env):
        """
        Check guest agent service status through QMP 'query-chardev'

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        def check_value_frontend_open(out, expected):
            """
            Get value of 'frontend-open' after executing 'query-chardev'
            :param out: output of executing 'query-chardev'
            :param expected: expected value of 'frontend-open'
            """
            for chardev_dict in out:
                if "org.qemu.guest_agent.0" in chardev_dict["filename"]:
                    ret = chardev_dict["frontend-open"]
                    if ret is expected:
                        break
                    else:
                        test.fail("The value of parameter 'frontend-open' "
                                  "is %s, it should be %s" % (ret, expected))
        error_context.context("Execute query-chardev when guest agent service "
                              "is on", logging.info)
        out = self.vm.monitor.query("chardev")
        check_value_frontend_open(out, True)
        session = self._get_session(params, self.vm)
        self.gagent_stop(session, self.vm)
        error_context.context("Execute query-chardev when guest agent service "
                              "is off", logging.info)
        out = self.vm.monitor.query("chardev")
        check_value_frontend_open(out, False)
        session.close()

    @error_context.context_aware
    def gagent_check_frozen_io(self, test, params, env):
        """
        fsfreeze test during disk io.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        error_context.context("Before freeze/thaw the FS, run the iozone test",
                              logging.info)
        session = self._get_session(self.params, None)
        self._open_session_list.append(session)
        iozone_cmd = utils_misc.set_winutils_letter(session, params["iozone_cmd"])
        session.cmd(iozone_cmd, timeout=360)
        error_context.context("Freeze the FS.", logging.info)
        try:
            self.gagent.fsfreeze()
        except guest_agent.VAgentCmdError as detail:
            if not re.search("timeout when try to receive Frozen event from"
                             " VSS provider", str(detail)):
                test.fail("guest-fsfreeze-freeze cmd failed with:"
                          "('%s')" % str(detail))
        if self.gagent.verify_fsfreeze_status(self.gagent.FSFREEZE_STATUS_FROZEN):
            try:
                self.gagent.fsthaw(check_status=False)
            except guest_agent.VAgentCmdError as detail:
                if not re.search("fsfreeze is limited up to 10 seconds", str(detail)):
                    test.error("guest-fsfreeze-thaw cmd failed with:"
                               "('%s')" % str(detail))

        self.gagent_verify(self.params, self.vm)

    @error_context.context_aware
    def gagent_check_vss_status(self, test, params, env):
        """
        Only for windows guest,check QEMU Guest Agent VSS Provider service start type
        and if it works.

        Steps:
        1) Check VSS Provider service start type.
        2) Check VSS Provider service should be in stopped status.
        3) Issue fsfreeze qga command.
        4) Check VSS Provider service should be in running status.
        5) Issue fsthaw qga command.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        def check_vss_info(cmd_type, key, expect_value):
            cmd_vss = "sc %s \"QEMU Guest Agent VSS Provider\" | findstr /i %s" % \
                      (cmd_type, key)
            status, output = session.cmd_status_output(cmd_vss)
            if status:
                test.error("Command to check VSS service info failed,"
                           "detailed info is:\n%s" % output)
            vss_result = output.split()[-1]
            if vss_result != expect_value:
                test.fail("The output is %s which is not expected."
                          % vss_result)

        session = self._get_session(self.params, None)
        self._open_session_list.append(session)

        error_context.context("Check VSS Provider service start type.",
                              logging.info)
        check_vss_info("qc", "START_TYPE", "DEMAND_START")

        error_context.context("Check VSS Provider status.", logging.info)
        check_vss_info("query", "STATE", "STOPPED")

        error_context.context("Freeze fs.", logging.info)
        self.gagent.fsfreeze()

        error_context.context("Check VSS Provider status after fsfreeze.", logging.info)
        check_vss_info("query", "STATE", "RUNNING")

        error_context.context("Thaw fs.", logging.info)
        try:
            self.gagent.fsthaw()
        except guest_agent.VAgentCmdError as detail:
            if not re.search("fsfreeze is limited up to 10 seconds", str(detail)):
                test.error("guest-fsfreeze-thaw cmd failed with:"
                           "('%s')" % str(detail))

    @error_context.context_aware
    def gagent_check_fsinfo(self, test, params, env):
        """
        Execute "guest-fsinfo" command to guest agent,check file system of
        mountpoint,disk's name and serial number.

        steps:
        1) check file system type of every mount point.
        2) check disk name.
        3) check disk's serial number.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.

        """
        session = self._get_session(params, None)
        self._open_session_list.append(session)
        serial_num = params["blk_extra_params"].split("=")[1]

        error_context.context("Check all file system info in a loop.", logging.info)
        fs_info_qga = self.gagent.get_fsinfo()
        for fs in fs_info_qga:
            mount_pt = fs["mountpoint"]
            if params["os_type"] == "windows":
                mount_pt = mount_pt[:2]

            error_context.context("Check file system type of '%s' mount point." %
                                  mount_pt, logging.info)
            fs_type_qga = fs["type"]
            cmd_get_disk = params["cmd_get_disk"] % mount_pt
            disk_info_guest = session.cmd(cmd_get_disk).strip().split()
            fs_type_guest = disk_info_guest[1]
            if fs_type_qga != fs_type_guest:
                test.fail("File System doesn't match.\n"
                          "from guest-agent is %s.\nfrom guest os is %s."
                          % (fs_type_qga, fs_type_guest))
            else:
                logging.info("File system type is %s which is expected." % fs_type_qga)

            error_context.context("Check disk name.", logging.info)
            disk_name_qga = fs["name"]
            disk_name_guest = disk_info_guest[0]
            if params["os_type"] == "linux":
                if not re.findall(r'^/\w*/\w*$', disk_name_guest):
                    disk_name_guest = session.cmd("readlink %s" % disk_name_guest).strip()
                disk_name_guest = disk_name_guest.split('/')[-1]
            if disk_name_qga != disk_name_guest:
                test.fail("Device name doesn't match.\n"
                          "from guest-agent is %s.\nit's from guest os is %s."
                          % (disk_name_qga, disk_name_guest))
            else:
                logging.info("Disk name is %s which is expected." % disk_name_qga)

            error_context.context("Check serial number of some disk.", logging.info)
            serial_qga = fs["disk"][0]["serial"]
            if not re.findall(serial_num, serial_qga):
                test.fail("Serial name is not correct via qga.\n"
                          "from guest-agent is %s.\n"
                          "but it should include %s." % (serial_qga, serial_num))
            else:
                logging.info("Serial number is %s which is expected." % serial_qga)

    @error_context.context_aware
    def gagent_check_nonexistent_cmd(self, test, params, env):
        """
        Execute "guest-fsinfo" command to guest agent, and check
        the return info.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        session = self._get_session(params, None)
        self._open_session_list.append(session)
        error_context.context("Issue the no existed guest-agent "
                              "cmd via qga.", logging.info)
        cmd_wrong = params["wrong_cmd"]
        try:
            self.gagent.cmd(cmd_wrong)
        except guest_agent.VAgentCmdError as detail:
            pattern = "command %s has not been found" % cmd_wrong
            if not re.search(pattern, str(detail), re.I):
                test.fail("The error info is not correct, the return is"
                          " %s." % str(detail))
        else:
            test.fail("Should return error info.")

    @error_context.context_aware
    def gagent_check_with_migrate(self, test, params, env):
        """
        Migration test with guest agent service running.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment.
        """
        error_context.context("Migrate guest while guest agent service is"
                              " running.", logging.info)
        self.vm.monitor.migrate_set_speed(params.get("mig_speed", "1G"))
        self.vm.migrate()
        error_context.context("Recreate a QemuAgent object after vm"
                              " migration.", logging.info)
        self.gagent = None
        args = [params.get("gagent_serial_type"), params.get("gagent_name")]
        self.gagent_create(params, self.vm, *args)
        error_context.context("Verify if guest agent works.", logging.info)
        self.gagent_verify(self.params, self.vm)

    def run_once(self, test, params, env):
        QemuGuestAgentTest.run_once(self, test, params, env)

        gagent_check_type = self.params["gagent_check_type"]
        chk_type = "gagent_check_%s" % gagent_check_type
        if hasattr(self, chk_type):
            func = getattr(self, chk_type)
            func(test, params, env)
        else:
            test.error("Could not find matching test, check your config file")


class QemuGuestAgentBasicCheckWin(QemuGuestAgentBasicCheck):

    """
    Qemu guest agent test class for windows guest.
    """
    def __init__(self, test, params, env):
        QemuGuestAgentBasicCheck.__init__(self, test, params, env)
        self.gagent_guest_dir = params.get("gagent_guest_dir", "")
        self.qemu_ga_pkg = params.get("qemu_ga_pkg", "")
        self.gagent_src_type = params.get("gagent_src_type", "url")

    @error_context.context_aware
    def get_qga_pkg_path(self, qemu_ga_pkg, test, session, params, vm):
        """
        Get the qemu-ga pkg path which will be installed.
        There are two methods to get qemu-ga pkg,one is download it
        from fedora people website,and the other is from virtio-win iso.

        :param qemu_ga_pkg: qemu-ga pkg name
        :param test: kvm test object
        :param session: VM session.
        :param params: Dictionary with the test parameters
        :param vm: Virtual machine object.
        :return qemu_ga_pkg_path: Return the guest agent pkg path.
        """
        error_context.context("Get %s path where it locates." % qemu_ga_pkg,
                              logging.info)

        if self.gagent_src_type == "url":
            gagent_host_path = params["gagent_host_path"]
            gagent_download_cmd = params["gagent_download_cmd"]

            error_context.context("Download qemu-ga.msi from website and copy "
                                  "it to guest.", logging.info)
            process.system(gagent_download_cmd, float(params.get("login_timeout", 360)))
            if not os.path.exists(gagent_host_path):
                test.error("qemu-ga.msi is not exist, maybe it is not "
                           "successfully downloaded ")
            s, o = session.cmd_status_output("mkdir %s" % self.gagent_guest_dir)
            if s and "already exists" not in o:
                test.error("Could not create qemu-ga directory in "
                           "VM '%s', detail: '%s'" % (vm.name, o))

            error_context.context("Copy qemu-ga.msi to guest", logging.info)
            vm.copy_files_to(gagent_host_path, self.gagent_guest_dir)
            qemu_ga_pkg_path = r"%s\%s" % (self.gagent_guest_dir, qemu_ga_pkg)
        elif self.gagent_src_type == "virtio-win":
            vol_virtio_key = "VolumeName like '%virtio-win%'"
            vol_virtio = utils_misc.get_win_disk_vol(session, vol_virtio_key)
            qemu_ga_pkg_path = r"%s:\%s\%s" % (vol_virtio, "guest-agent", qemu_ga_pkg)
        else:
            test.error("Only support 'url' and 'virtio-win' method to "
                       "download qga installer now.")

        logging.info("The qemu-ga pkg full path is %s" % qemu_ga_pkg_path)
        return qemu_ga_pkg_path

    @error_context.context_aware
    def setup(self, test, params, env):
        BaseVirtTest.setup(self, test, params, env)

        if self.start_vm == "yes":
            session = self._get_session(params, self.vm)
            self._open_session_list.append(session)
            qemu_ga_pkg_path = self.get_qga_pkg_path(self.qemu_ga_pkg, test,
                                                     session, params, self.vm)
            self.gagent_install_cmd = params.get("gagent_install_cmd"
                                                 ) % qemu_ga_pkg_path

            if self._check_ga_pkg(session, params.get("gagent_pkg_check_cmd")):
                logging.info("qemu-ga is already installed.")
            else:
                logging.info("qemu-ga is not installed.")
                self.gagent_install(session, self.vm)

            if self._check_ga_service(session, params.get("gagent_status_cmd")):
                logging.info("qemu-ga service is already running.")
            else:
                logging.info("qemu-ga service is not running.")
                self.gagent_start(session, self.vm)

            args = [params.get("gagent_serial_type"), params.get("gagent_name")]
            self.gagent_create(params, self.vm, *args)

    @error_context.context_aware
    def gagent_check_fsfreeze_vss_test(self, test, params, env):
        """
        Test guest agent commands "guest-fsfreeze-freeze/status/thaw"
        for windows guest.

        Test steps:
        1) Check the FS is thawed.
        2) Start writing file test as a background test.
        3) Freeze the FS.
        3) Check the FS is frozen from both guest agent side and guest os side.
        4) Start writing file test as a background test.
        5) Thaw the FS.
        6) Check the FS is thaw from both guest agent side and guest os side.

        :param test: kvm test object
        :param params: Dictionary with the test parameters
        :param env: Dictionary with test environment
        """
        @error_context.context_aware
        def background_start(session):
            """
            Before freeze or thaw guest file system, start a background test.
            """
            logging.info("Write time stamp to guest file per second "
                         "as a background job.")
            fswrite_cmd = utils_misc.set_winutils_letter(
                session, self.params["gagent_fs_test_cmd"])

            session.cmd(fswrite_cmd, timeout=360)

        @error_context.context_aware
        def result_check(flag, write_timeout, session):
            """
            Check if freeze or thaw guest file system works.

            :param flag: frozen or thaw
            :param write_timeout: timeout of writing to guest file
            """
            time.sleep(write_timeout)
            k_cmd = "wmic process where \"name='python.exe' and " \
                    "CommandLine Like '%fsfreeze%'\" call terminate"
            s, o = session.cmd_status_output(k_cmd)
            if s:
                self.test.error("Command '%s' failed, status: %s,"
                                " output: %s" % (k_cmd, s, o))

            error_context.context("Check guest FS status.", logging.info)
            # init fs status to 'thaw'
            fs_status = "thaw"
            file_name = "/tmp/fsfreeze_%s.txt" % flag
            process.system("rm -rf %s" % file_name)
            self.vm.copy_files_from("C:\\fsfreeze.txt", file_name)
            with open(file_name, 'r') as f:
                list_time = f.readlines()

            for i in list(range(0, len(list_time))):
                list_time[i] = list_time[i].strip()

            for i in list(range(1, len(list_time))):
                num_d = float(list_time[i]) - float(list_time[i - 1])
                if num_d > 8:
                    logging.info("Time stamp is not continuous,"
                                 " so the FS is frozen.")
                    fs_status = "frozen"
                    break
            if not fs_status == flag:
                self.test.fail("FS is not %s, it's %s." % (flag, fs_status))

        error_context.context("Check guest agent command "
                              "'guest-fsfreeze-freeze/thaw'",
                              logging.info)
        session = self._get_session(self.params, None)
        self._open_session_list.append(session)

        # make write time longer than freeze timeout
        write_timeout = int(params["freeze_timeout"]) + 10
        try:
            expect_status = self.gagent.FSFREEZE_STATUS_THAWED
            self.gagent.verify_fsfreeze_status(expect_status)
        except guest_agent.VAgentFreezeStatusError:
            # Thaw guest FS if the fs status is incorrect.
            self.gagent.fsthaw(check_status=False)

        error_context.context("Before freeze/thaw the FS, run the background "
                              "job.", logging.info)
        background_start(session)
        error_context.context("Freeze the FS.", logging.info)
        self.gagent.fsfreeze()
        try:
            error_context.context("Waiting %s, then finish writing the time "
                                  "stamp in guest file." % write_timeout)
            result_check("frozen", write_timeout, session)
            # Next, thaw guest fs.
            error_context.context("Before freeze/thaw the FS, run the background "
                                  "job.", logging.info)
            background_start(session)
            error_context.context("Thaw the FS.", logging.info)
            try:
                self.gagent.fsthaw()
            except guest_agent.VAgentCmdError as detail:
                if re.search("fsfreeze is limited up to 10 seconds", str(detail)):
                    logging.info("FS is thaw as it's limited up to 10 seconds.")
                else:
                    test.fail("guest-fsfreeze-thaw cmd failed with:"
                              "('%s')" % str(detail))
        except Exception:
            # Thaw fs finally, avoid problem in following cases.
            try:
                self.gagent.fsthaw(check_status=False)
            except Exception as detail:
                # Ignore exception for this thaw action.
                logging.warn("Finally failed to thaw guest fs,"
                             " detail: '%s'", detail)
            raise
        error_context.context("Waiting %s, then finish writing the time "
                              "stamp in guest file." % write_timeout)
        result_check("thaw", write_timeout, session)


def run(test, params, env):
    """
    Test qemu guest agent, this case will:
    1) Start VM with virtio serial port.
    2) Install qemu-guest-agent package in guest.
    3) Run some basic test for qemu guest agent.

    :param test: kvm test object
    :param params: Dictionary with the test parameters
    :param env: Dictionary with test environmen.
    """
    if params["os_type"] == "windows":
        gagent_test = QemuGuestAgentBasicCheckWin(test, params, env)
    else:
        gagent_test = QemuGuestAgentBasicCheck(test, params, env)

    gagent_test.execute(test, params, env)