vnfs: Enable PVP using vhost-user

Enable booting of a VM with DPDK and run testpmd for
PVP testing.
* Added throughput and back2back tests with pvp deployment scenario in
  01_testcases.conf
* PVP requires DPDK 2.0 with VHOST_USER enabled and QEMU 2.2.0
* Tested on CentOS7 and Fedora 20
* Fix conflict with change 1078

Recent Changes:
* Fix merge conflict (testcase.py and testcases.conf)
* Remove QEMU_DIR. User must set QEMU_BIN
* Set bidir traffic to True
* Add flow for bi-directional traffic
* Use working OVS_TAG ad2e649834be20dd01b1632799fe778106a96a2d
* Merge change 1096 (src: Add QEMU makefile)
* Set virtio-net-pci csum=off and other variables to off
* Move hardcoded values to conf/*

JIRA: VSPERF-56

Change-Id: I4ad184531064855493483d9833a7722c9f7d3576
Signed-off-by: Madarang, Dino Simeon <dino.simeonx.madarang@intel.com>
Signed-off-by: Meghan Halton <meghan.halton@intel.com>
Reviewed-by: Billy O Mahony <billy.o.mahony@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Martin Klozik <martinx.klozik@intel.com>

2 files changed, 399 insertions, 0 deletions

diff --git a/vnfs/qemu/__init__.py b/vnfs/qemu/__init__.py
new file mode 100644
index 00000000..82f32eb9
--- /dev/null
+++ b/vnfs/qemu/__init__.py
@@ -0,0 +1,20 @@
+# Copyright 2015 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Package for vnf wrappers for use with VSPERF.
+
+This package contains an implementation of the interface the VSPERF core
+uses for controlling VNFs using QEMU and DPDK's testpmd application.
+"""
+
diff --git a/vnfs/qemu/qemu_dpdk_vhost_user.py b/vnfs/qemu/qemu_dpdk_vhost_user.py
new file mode 100644
index 00000000..a3b96b18
--- /dev/null
+++ b/vnfs/qemu/qemu_dpdk_vhost_user.py
@@ -0,0 +1,379 @@
+# Copyright 2015 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Automation of QEMU hypervisor for launching vhost-user enabled guests.
+"""
+
+import os
+import time
+import logging
+import locale
+import re
+import subprocess
+
+from tools import tasks
+from conf import settings
+from vnfs.vnf.vnf import IVnf
+
+_QEMU_BIN = settings.getValue('QEMU_BIN')
+_RTE_TARGET = settings.getValue('RTE_TARGET')
+
+GUEST_MEMORY = '4096M'
+GUEST_SMP = '2'
+GUEST_CORE_BINDING = [(4, 5), (6, 7), (9, 10)]
+
+GUEST_IMAGE = settings.getValue('GUEST_IMAGE')
+GUEST_SHARE_DIR = settings.getValue('GUEST_SHARE_DIR')
+
+GUEST_USERNAME = settings.getValue('GUEST_USERNAME')
+GUEST_PASSWORD = settings.getValue('GUEST_PASSWORD')
+
+GUEST_PROMPT_LOGIN = settings.getValue('GUEST_PROMPT_LOGIN')
+GUEST_PROMPT_PASSWORD = settings.getValue('GUEST_PROMPT_PASSWORD')
+GUEST_PROMPT = settings.getValue('GUEST_PROMPT')
+
+_QEMU_GUEST_DPDK_PROMPT = settings.getValue('QEMU_GUEST_DPDK_PROMPT')
+_QEMU_GUEST_TEST_PMD_PROMPT = settings.getValue('QEMU_GUEST_TEST_PMD_PROMPT')
+_HUGEPAGE_DIR = settings.getValue('HUGEPAGE_DIR')
+
+_GUEST_OVS_DPDK_DIR = '/root/ovs_dpdk'
+_OVS_DPDK_SHARE = '/mnt/ovs_dpdk_share'
+
+LOG_FILE_QEMU = os.path.join(
+    settings.getValue('LOG_DIR'), settings.getValue('LOG_FILE_QEMU'))
+LOG_FILE_GUEST_CMDS = os.path.join(
+    settings.getValue('LOG_DIR'), settings.getValue('LOG_FILE_GUEST_CMDS'))
+
+VHOST_DEV_PATH = os.path.join('/dev', settings.getValue('VHOST_DEV_FILE'))
+
+_OVS_VAR_DIR = settings.getValue('OVS_VAR_DIR')
+_GUEST_NET1_MAC = settings.getValue('GUEST_NET1_MAC')
+_GUEST_NET2_MAC = settings.getValue('GUEST_NET2_MAC')
+_GUEST_NET1_PCI_ADDRESS = settings.getValue('GUEST_NET1_PCI_ADDRESS')
+_GUEST_NET2_PCI_ADDRESS = settings.getValue('GUEST_NET2_PCI_ADDRESS')
+
+class QemuDpdkVhost(tasks.Process, IVnf):
+    """
+    Control an instance of QEMU with vHost user guest communication.
+    """
+    _bin = _QEMU_BIN
+    _logfile = LOG_FILE_QEMU
+    _cmd = None
+    _expect = GUEST_PROMPT_LOGIN
+    _proc_name = 'qemu'
+    _number_vnfs = 0
+
+    class GuestCommandFilter(logging.Filter):
+        """
+        Filter out strings beginning with 'guestcmd :'.
+        """
+        def filter(self, record):
+            return record.getMessage().startswith(self.prefix)
+
+    def __init__(self, memory=GUEST_MEMORY, cpus=GUEST_SMP,
+                 monitor_path='/tmp', shared_path_host=GUEST_SHARE_DIR,
+                 args='', timeout=120, deployment="P2P"):
+        """
+        Initialisation function.
+
+        :param timeout: Time to wait for login prompt. If set to
+            0 do not wait.
+        :param number: Number of QEMU instance, used when multiple QEMU
+            instances are started at once.
+        :param args: Arguments to pass to QEMU.
+
+        :returns: None
+        """
+        self._logger = logging.getLogger(__name__)
+        self._number = self._number_vnfs
+        self._number_vnfs = self._number_vnfs + 1
+        self._logfile = self._logfile + str(self._number)
+        self._log_prefix = 'guest_%d_cmd : ' % self._number
+        self._timeout = timeout
+        self._monitor = '%s/vm%dmonitor' % (monitor_path, self._number)
+
+        name = 'Client%d' % self._number
+        vnc = ':%d' % self._number
+        self._cmd = ['sudo', '-E', self._bin, '-m', str(memory),
+                     '-smp', str(cpus), '-cpu', 'host',
+                     '-drive', 'if=scsi,file='+GUEST_IMAGE,
+                     '-drive',
+                     'if=scsi,file=fat:rw:%s,snapshot=off' % shared_path_host,
+                     '-boot', 'c', '--enable-kvm', '-pidfile', '/tmp/vm1.pid',
+                     '-monitor', 'unix:%s,server,nowait' % self._monitor,
+                     '-object',
+                     'memory-backend-file,id=mem,size=4096M,' +
+                     'mem-path=' + _HUGEPAGE_DIR + ',share=on',
+                     '-numa', 'node,memdev=mem -mem-prealloc',
+                     '-chardev',
+                     'socket,id=char0,path=' + _OVS_VAR_DIR + 'dpdkvhostuser0',
+                     '-chardev',
+                     'socket,id=char1,path=' + _OVS_VAR_DIR + 'dpdkvhostuser1',
+                     '-netdev',
+                     'type=vhost-user,id=net1,chardev=char0,vhostforce',
+                     '-device',
+                     'virtio-net-pci,mac=' + _GUEST_NET1_MAC +
+                     ',netdev=net1,csum=off,gso=off,' +
+                     'guest_tso4=off,guest_tso6=off,guest_ecn=off',
+                     '-netdev',
+                     'type=vhost-user,id=net2,chardev=char1,vhostforce',
+                     '-device',
+                     'virtio-net-pci,mac=' + _GUEST_NET2_MAC +
+                     ',netdev=net2,csum=off,gso=off,' +
+                     'guest_tso4=off,guest_tso6=off,guest_ecn=off',
+                     '-nographic', '-vnc', str(vnc), '-name', name,
+                     '-snapshot',
+                    ]
+        self._cmd.extend(args)
+        self._configure_logging()
+
+    def _configure_logging(self):
+        """
+        Configure logging.
+        """
+        self.GuestCommandFilter.prefix = self._log_prefix
+
+        logger = logging.getLogger()
+        cmd_logger = logging.FileHandler(
+            filename=LOG_FILE_GUEST_CMDS + str(self._number))
+        cmd_logger.setLevel(logging.DEBUG)
+        cmd_logger.addFilter(self.GuestCommandFilter())
+        logger.addHandler(cmd_logger)
+
+    # startup/Shutdown
+
+    def start(self):
+        """
+        Start QEMU instance, login and prepare for commands.
+        """
+        super(QemuDpdkVhost, self).start()
+        self._affinitize()
+
+        if self._timeout:
+            self._login()
+            self._config_guest_loopback()
+
+    def stop(self):
+        """
+        Kill QEMU instance if it is alive.
+        """
+        self._logger.info('Killing QEMU...')
+
+        super(QemuDpdkVhost, self).kill()
+
+    # helper functions
+
+    def _login(self, timeout=120):
+        """
+        Login to QEMU instance.
+
+        This can be used immediately after booting the machine, provided a
+        sufficiently long ``timeout`` is given.
+
+        :param timeout: Timeout to wait for login to complete.
+
+        :returns: None
+        """
+        # if no timeout was set, we likely started QEMU without waiting for it
+        # to boot. This being the case, we best check that it has finished
+        # first.
+        if not self._timeout:
+            self._expect_process(timeout=timeout)
+
+        self._child.sendline(GUEST_USERNAME)
+        self._child.expect(GUEST_PROMPT_PASSWORD, timeout=5)
+        self._child.sendline(GUEST_PASSWORD)
+
+        self._expect_process(GUEST_PROMPT, timeout=5)
+
+    def execute(self, cmd, delay=0):
+        """
+        Send ``cmd`` with no wait.
+
+        Useful for asynchronous commands.
+
+        :param cmd: Command to send to guest.
+        :param timeout: Delay to wait after sending command before returning.
+
+        :returns: None
+        """
+        self._logger.debug('%s%s', self._log_prefix, cmd)
+        self._child.sendline(cmd)
+        time.sleep(delay)
+
+    def wait(self, msg=GUEST_PROMPT, timeout=30):
+        """
+        Wait for ``msg``.
+
+        :param msg: Message to wait for from guest.
+        :param timeout: Time to wait for message.
+
+        :returns: None
+        """
+        self._child.expect(msg, timeout=timeout)
+
+    def execute_and_wait(self, cmd, timeout=30, prompt=GUEST_PROMPT):
+        """
+        Send ``cmd`` and wait ``timeout`` seconds for prompt.
+
+        :param cmd: Command to send to guest.
+        :param timeout: Time to wait for prompt.
+
+        :returns: None
+        """
+        self.execute(cmd)
+        self.wait(prompt, timeout=timeout)
+
+    def send_and_pass(self, cmd, timeout=30):
+        """
+        Send ``cmd`` and wait ``timeout`` seconds for it to pass.
+
+        :param cmd: Command to send to guest.
+        :param timeout: Time to wait for prompt before checking return code.
+
+        :returns: None
+        """
+        self.execute(cmd)
+        self.wait(GUEST_PROMPT, timeout=timeout)
+        self.execute('echo $?')
+        self._child.expect('^0$', timeout=1)  # expect a 0
+        self.wait(GUEST_PROMPT, timeout=timeout)
+
+    def _affinitize(self):
+        """
+        Affinitize the SMP cores of a QEMU instance.
+
+        This is a bit of a hack. The 'socat' utility is used to
+        interact with the QEMU HMP. This is necessary due to the lack
+        of QMP in older versions of QEMU, like v1.6.2. In future
+        releases, this should be replaced with calls to libvirt or
+        another Python-QEMU wrapper library.
+
+        :returns: None
+        """
+        thread_id = (r'.* CPU #%d: .* thread_id=(\d+)')
+
+        self._logger.info('Affinitizing guest...')
+
+        cur_locale = locale.getlocale()[1]
+        proc = subprocess.Popen(
+            ('echo', 'info cpus'), stdout=subprocess.PIPE)
+        output = subprocess.check_output(
+            ('sudo', 'socat', '-', 'UNIX-CONNECT:%s' % self._monitor),
+            stdin=proc.stdout)
+        proc.wait()
+
+        for cpu in range(0, int(GUEST_SMP)):
+            match = None
+            for line in output.decode(cur_locale).split('\n'):
+                match = re.search(thread_id % cpu, line)
+                if match:
+                    self._affinitize_pid(
+                        GUEST_CORE_BINDING[self._number - 1][cpu],
+                        match.group(1))
+                    break
+
+            if not match:
+                self._logger.error('Failed to affinitize guest core #%d. Could'
+                                   ' not parse tid.', cpu)
+
+    def _config_guest_loopback(self):
+        '''# mount hugepages
+        # Guest images _should_ have 1024 hugepages by default,
+        # but just in case:'''
+        self.execute_and_wait('sysctl vm.nr_hugepages=1024')
+        self.execute_and_wait('mkdir -p /dev/hugepages')
+        self.execute_and_wait(
+            'mount -t hugetlbfs hugetlbfs /dev/hugepages')
+
+        # mount shared directory
+        self.execute_and_wait('umount ' + _OVS_DPDK_SHARE)
+        self.execute_and_wait('rm -rf ' + _GUEST_OVS_DPDK_DIR)
+        self.execute_and_wait('mkdir -p ' + _OVS_DPDK_SHARE)
+        self.execute_and_wait('mount -o iocharset=utf8 /dev/sdb1 ' +
+                              _OVS_DPDK_SHARE)
+        self.execute_and_wait('mkdir -p ' + _GUEST_OVS_DPDK_DIR)
+        self.execute_and_wait('cp -a ' + _OVS_DPDK_SHARE + '/* ' + _GUEST_OVS_DPDK_DIR)
+        # Get VM info
+        self.execute_and_wait('cat /etc/default/grub')
+
+        # Disable services (F16)
+        self.execute_and_wait('systemctl status iptables.service')
+        self.execute_and_wait('systemctl stop iptables.service')
+
+        # build and configure system for dpdk
+        self.execute_and_wait('cd ' + _GUEST_OVS_DPDK_DIR + '/DPDK',
+                              prompt=_QEMU_GUEST_DPDK_PROMPT)
+
+        self.execute_and_wait('export CC=gcc', prompt=_QEMU_GUEST_DPDK_PROMPT)
+        self.execute_and_wait('export RTE_SDK=' + _GUEST_OVS_DPDK_DIR + '/DPDK',
+                              prompt=_QEMU_GUEST_DPDK_PROMPT)
+        self.execute_and_wait('export RTE_TARGET=%s' % _RTE_TARGET,
+                              prompt=_QEMU_GUEST_DPDK_PROMPT)
+
+        self.execute_and_wait('make uninstall', prompt=_QEMU_GUEST_DPDK_PROMPT)
+        self.execute_and_wait('make install T=%s -j 2' % _RTE_TARGET,
+                              timeout=300, prompt=_QEMU_GUEST_DPDK_PROMPT)
+
+        self.execute_and_wait('modprobe uio', prompt=_QEMU_GUEST_DPDK_PROMPT)
+        self.execute_and_wait('insmod %s/kmod/igb_uio.ko' % _RTE_TARGET,
+                              prompt=_QEMU_GUEST_DPDK_PROMPT)
+        self.execute_and_wait('./tools/dpdk_nic_bind.py --status',
+                              prompt=_QEMU_GUEST_DPDK_PROMPT)
+        self.execute_and_wait('./tools/dpdk_nic_bind.py -b igb_uio'
+                              ' ' + _GUEST_NET1_PCI_ADDRESS + ' '
+                              + _GUEST_NET2_PCI_ADDRESS,
+                              prompt=_QEMU_GUEST_DPDK_PROMPT)
+
+        # build and run 'test-pmd'
+        self.execute_and_wait('cd ' + _GUEST_OVS_DPDK_DIR +
+                              '/DPDK/app/test-pmd',
+                              prompt=_QEMU_GUEST_TEST_PMD_PROMPT)
+        self.execute_and_wait('make clean', prompt=_QEMU_GUEST_TEST_PMD_PROMPT)
+        self.execute_and_wait('make', prompt=_QEMU_GUEST_TEST_PMD_PROMPT)
+        self.execute_and_wait('./testpmd -c 0x3 -n 4 --socket-mem 512 --'
+                              ' --burst=64 -i --txqflags=0xf00 ' +
+                              '--disable-hw-vlan', 20, "Done")
+        self.execute('set fwd mac_retry', 1)
+        self.execute_and_wait('start', 20,
+                              'TX RS bit threshold=0 - TXQ flags=0xf00')
+
+
+if __name__ == '__main__':
+    import sys
+
+    with QemuDpdkVhost() as vm1:
+        print(
+            '\n\n************************\n'
+            'Basic command line suitable for ls, cd, grep and cat.\n If you'
+            ' try to run Vim from here you\'re going to have a bad time.\n'
+            'For more complex tasks please use \'vncviewer :1\' to connect to'
+            ' this VM\nUsername: %s Password: %s\nPress ctrl-C to quit\n'
+            '************************\n' % (GUEST_USERNAME, GUEST_PASSWORD))
+
+        if sys.argv[1]:
+            with open(sys.argv[1], 'r') as file_:
+                for logline in file_:
+                    # lines are of format:
+                    #   guest_N_cmd : <command>
+                    # and we only want the <command> piece
+                    cmdline = logline.split(':')[1].strip()
+
+                    # use a no timeout since we don't know how long we
+                    # should wait
+                    vm1.send_and_wait(cmdline, timeout=-1)
+
+        while True:
+            USER_INPUT = input()
+            vm1.send_and_wait(USER_INPUT, timeout=5)