From 99213f4ec15e0f5d1c5cae562e1010091da4a66e Mon Sep 17 00:00:00 2001
From: Yash Mankad <ymankad@redhat.com>
Date: Wed, 12 Dec 2018 00:14:38 +0000
Subject: [PATCH 10/13] scripts/qemu.py: introduce set_console() method
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RH-Author: Yash Mankad <ymankad@redhat.com>
Message-id: <76ce1001806fed23760f7c02b8e8472d793ef8b1.1544573601.git.ymankad@redhat.com>
Patchwork-id: 83435
O-Subject: [RHEL-8.0 qemu-kvm PATCH v2 4/7] scripts/qemu.py: introduce set_console() method
Bugzilla: 1655807
RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
RH-Acked-by: John Snow <jsnow@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
From: Cleber Rosa <crosa@redhat.com>
The set_console() method is intended to ease higher level use cases
that require a console device.
The amount of intelligence is limited on purpose, requiring either the
device type explicitly, or the existence of a machine (pattern)
definition.
Because of the console device type selection criteria (by machine
type), users should also be able to define that. It'll then be used
for both '-machine' and for the console device type selection.
Users of the set_console() method will certainly be interested in
accessing the console device, and for that a console_socket property
has been added.
Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20180530184156.15634-5-crosa@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
(cherry picked from commit 22dea9db2baf72a79782c748c57e2d87b06234d5)
Signed-off-by: Yash Mankad <ymankad@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
scripts/qemu.py | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 96 insertions(+), 1 deletion(-)
diff --git a/scripts/qemu.py b/scripts/qemu.py
index 7cd8193..f099ce7 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -17,19 +17,41 @@ import logging
import os
import subprocess
import qmp.qmp
+import re
import shutil
+import socket
import tempfile
LOG = logging.getLogger(__name__)
+#: Maps machine types to the preferred console device types
+CONSOLE_DEV_TYPES = {
+ r'^clipper$': 'isa-serial',
+ r'^malta': 'isa-serial',
+ r'^(pc.*|q35.*|isapc)$': 'isa-serial',
+ r'^(40p|powernv|prep)$': 'isa-serial',
+ r'^pseries.*': 'spapr-vty',
+ r'^s390-ccw-virtio.*': 'sclpconsole',
+ }
+
+
class QEMUMachineError(Exception):
"""
Exception called when an error in QEMUMachine happens.
"""
+class QEMUMachineAddDeviceError(QEMUMachineError):
+ """
+ Exception raised when a request to add a device can not be fulfilled
+
+ The failures are caused by limitations, lack of information or conflicting
+ requests on the QEMUMachine methods. This exception does not represent
+ failures reported by the QEMU binary itself.
+ """
+
class MonitorResponseError(qmp.qmp.QMPError):
'''
Represents erroneous QMP monitor reply
@@ -91,6 +113,10 @@ class QEMUMachine(object):
self._test_dir = test_dir
self._temp_dir = None
self._launched = False
+ self._machine = None
+ self._console_device_type = None
+ self._console_address = None
+ self._console_socket = None
# just in case logging wasn't configured by the main script:
logging.basicConfig()
@@ -175,9 +201,19 @@ class QEMUMachine(object):
self._monitor_address[1])
else:
moncdev = 'socket,id=mon,path=%s' % self._vm_monitor
- return ['-chardev', moncdev,
+ args = ['-chardev', moncdev,
'-mon', 'chardev=mon,mode=control',
'-display', 'none', '-vga', 'none']
+ if self._machine is not None:
+ args.extend(['-machine', self._machine])
+ if self._console_device_type is not None:
+ self._console_address = os.path.join(self._temp_dir,
+ self._name + "-console.sock")
+ chardev = ('socket,id=console,path=%s,server,nowait' %
+ self._console_address)
+ device = '%s,chardev=console' % self._console_device_type
+ args.extend(['-chardev', chardev, '-device', device])
+ return args
def _pre_launch(self):
self._temp_dir = tempfile.mkdtemp(dir=self._test_dir)
@@ -202,6 +238,10 @@ class QEMUMachine(object):
self._qemu_log_path = None
+ if self._console_socket is not None:
+ self._console_socket.close()
+ self._console_socket = None
+
if self._temp_dir is not None:
shutil.rmtree(self._temp_dir)
self._temp_dir = None
@@ -365,3 +405,58 @@ class QEMUMachine(object):
Adds to the list of extra arguments to be given to the QEMU binary
'''
self._args.extend(args)
+
+ def set_machine(self, machine_type):
+ '''
+ Sets the machine type
+
+ If set, the machine type will be added to the base arguments
+ of the resulting QEMU command line.
+ '''
+ self._machine = machine_type
+
+ def set_console(self, device_type=None):
+ '''
+ Sets the device type for a console device
+
+ If set, the console device and a backing character device will
+ be added to the base arguments of the resulting QEMU command
+ line.
+
+ This is a convenience method that will either use the provided
+ device type, of if not given, it will used the device type set
+ on CONSOLE_DEV_TYPES.
+
+ The actual setting of command line arguments will be be done at
+ machine launch time, as it depends on the temporary directory
+ to be created.
+
+ @param device_type: the device type, such as "isa-serial"
+ @raises: QEMUMachineAddDeviceError if the device type is not given
+ and can not be determined.
+ '''
+ if device_type is None:
+ if self._machine is None:
+ raise QEMUMachineAddDeviceError("Can not add a console device:"
+ " QEMU instance without a "
+ "defined machine type")
+ for regex, device in CONSOLE_DEV_TYPES.items():
+ if re.match(regex, self._machine):
+ device_type = device
+ break
+ if device_type is None:
+ raise QEMUMachineAddDeviceError("Can not add a console device:"
+ " no matching console device "
+ "type definition")
+ self._console_device_type = device_type
+
+ @property
+ def console_socket(self):
+ """
+ Returns a socket connected to the console
+ """
+ if self._console_socket is None:
+ self._console_socket = socket.socket(socket.AF_UNIX,
+ socket.SOCK_STREAM)
+ self._console_socket.connect(self._console_address)
+ return self._console_socket
--
1.8.3.1