Merge pull request #1118 from lijinlijin/rng_host_guest_read

rng_host_guest_read:Host and guest read data at the same time

qemu/tests/cfg/rng_host_guest_read.cfg

+- rng_host_guest_read:
+    type = rng_host_guest_read
+    kill_vm = yes
+    virt_test_type = qemu
+    no no_virtio_rng
+    guest_rng_test = rng_bat
+    host_read_cmd = "dd if=/dev/urandom of=/dev/null"
+    Windows:
+        read_rng_cmd  = "WIN_UTILS:\random_%PROCESSOR_ARCHITECTURE%.exe"
+        driver_name = "viorng"
+        rng_data_rex = "0x\w"
+        driver_id_pattern = "(.*?):.*?VirtIO RNG Device"
+        i386:
+            driver_id_cmd = 'WIN_UTILS:\devcon\wxp_x86\devcon.exe find * | find "VirtIO"'
+            driver_check_cmd = "WIN_UTILS:\devcon\wxp_x86\devcon.exe status @DRIVER_ID"
+        x86_64:
+            driver_id_cmd = 'WIN_UTILS:\devcon\wnet_amd64\devcon.exe find * | find "VirtIO"'
+            driver_check_cmd = "WIN_UTILS:\devcon\wnet_amd64\devcon.exe status @DRIVER_ID"
+    Linux:
+        read_rng_cmd  = "dd if=/dev/random  bs=1 count=10 2>/dev/null|hexdump"
+        driver_verifier_cmd = "cat /sys/devices/virtual/misc/hw_random/rng_current"
+        driver_name = virtio
+        rng_data_rex = "\w+"

qemu/tests/rng_host_guest_read.py

+import logging
+
+from virttest import error_context
+from virttest import utils_test
+from avocado.utils import process
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    Qemu virtio-rng device test:
+    1) boot guest with virtio-rng device
+    2) host read random numbers in the background
+    3) guest read random data at the same time during step2
+    4) clean host read process after test
+
+    :param test: QEMU test object
+    :param params: Dictionary with the test parameters
+    :param env: Dictionary with test environment.
+    """
+
+    def host_read_start(host_read_cmd):
+        """
+        Read random numbers on the host side
+        :param host_read_cmd: host read random numbers command line
+        :return: reture host_read_process
+        """
+        host_read_process = process.SubProcess(host_read_cmd, shell=True)
+        host_read_process.start()
+        return host_read_process
+
+    def host_read_clean(host_read_process):
+        """
+        Clean host read random numbers process
+        :param host_read_process: process of the host reading
+        """
+        if host_read_process.poll() is None:
+            host_read_process.kill()
+
+    host_read_cmd = params.get("host_read_cmd")
+    guest_rng_test = params.get("guest_rng_test")
+    vm = env.get_vm(params["main_vm"])
+    vm.wait_for_login()
+
+    error_context.context("Host read random numbers in the background",
+                          logging.info)
+    host_read_process = host_read_start(host_read_cmd)
+
+    try:
+        if host_read_process.poll() is None:
+            error_context.context("Guest begin to read random numbers",
+                                  logging.info)
+            utils_test.run_virt_sub_test(test, params, env, guest_rng_test)
+        else:
+            test.error("Host reading data is not alive!")
+    finally:
+        error_context.context("Clean host read process", logging.info)
+        host_read_clean(host_read_process)