/usr/lib/python2.7/dist-packages/virtualbricks/virtualmachines.py is in virtualbricks 1.0.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Virtualbricks - a vde/qemu gui written in python and GTK/Glade.
# Copyright (C) 2013 Virtualbricks team
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import os
import errno
import re
import datetime
import shutil
import itertools
from twisted.internet import utils, defer
from virtualbricks import (errors, tools, settings, bricks, log, project,
observable)
if False:
_ = str
__metaclass__ = type
logger = log.Logger()
new_cow = log.Event("Creating a new private COW from {base} image.")
invalid_base = log.Event("{cowname} private cow found with a different base "
"image ({base}): moving it in {path}")
powerdown = log.Event("Sending powerdown to {vm}")
update_usb = log.Event("update_usbdevlist: old {old} - new {new}")
own_err = log.Event("plug {plug} does not belong to {brick}")
acquire_lock = log.Event("Aquiring disk locks")
release_lock = log.Event("Releasing disk locks")
class UsbDevice:
def __init__(self, ID, desc=""):
self.ID = ID
self.desc = desc
def __eq__(self, other):
if not isinstance(other, self.__class__):
return NotImplemented
return self.ID == other.ID
def __ne__(self, other):
if not isinstance(other, self.__class__):
return NotImplemented
return not self.__eq__(other)
def __hash__(self):
return hash(self.ID)
def __str__(self):
return str(self.ID)
def __repr__(self):
return str(self.ID)
def __format__(self, format_string):
if format_string == "id":
return str(self.ID)
elif format_string == "d":
return str(self.desc)
elif format_string == "":
return str(self)
raise ValueError("invalid format string" + repr(format_string))
class Wrapper:
def __init__(self, original):
self.__dict__["original"] = original
def __getattr__(self, name):
try:
return getattr(self.original, name)
except AttributeError:
raise AttributeError("{0.__class__.__name__}.{1}".format(
self, name))
def __setattr__(self, name, value):
if name in self.__dict__:
self.__dict__[name] = value
else:
for klass in self.__class__.__mro__:
if name in klass.__dict__:
self.__dict__[name] = value
break
else:
setattr(self.original, name, value)
class VMPlug(Wrapper):
def __init__(self, plug):
Wrapper.__init__(self, plug)
self.model = "rtl8139"
self.mac = tools.random_mac()
class VMSock(Wrapper):
def __init__(self, sock):
Wrapper.__init__(self, sock)
self.model = "rtl8139"
self.mac = tools.random_mac()
def connect(self, endpoint):
return
class _FakeBrick:
name = "hostonly"
def poweron(self):
return defer.succeed(self)
class _HostonlySock:
"""
This is dummy implementation of a VMSock used with VirtualMachines that
want a plug that is not connected to nothing. The instance is a singleton,
but not enforced anyhow, maybe a better solution is to have a different
hostonly socket for each plug and let the brick choose which socket should
be saved and which not.
"""
nickname = "_hostonly"
path = "?"
model = "?"
mac = "?"
mode = "hostonly"
brick = _FakeBrick()
plugs = []
hostonly_sock = _HostonlySock()
class Image:
readonly = False
master = None
_description = None
_name = ""
def __init__(self, name, path, description=""):
self.observable = observable.Observable("changed")
self._name = name
self.path = os.path.abspath(path)
if description:
self.set_description(description)
def _description_file(self):
return self.path + ".vbdescr"
def set_description(self, descr):
if descr != self._description:
self._description = descr
try:
with open(self._description_file(), "w") as fp:
fp.write(descr)
except IOError:
pass
self.observable.notify("changed", self)
def get_description(self):
if self._description is None:
try:
with open(self._description_file()) as fp:
return fp.read()
except IOError:
return ""
else:
return self._description
description = property(get_description, set_description)
def set_name(self, value):
self._name = value
self.observable.notify("changed", self)
def get_name(self):
return self._name
name = property(get_name, set_name)
def basename(self):
return os.path.basename(self.path)
def get_size(self):
if not self.exists():
return "0"
size = os.path.getsize(self.path)
if size > 1000000:
return str(size / 1000000)
else:
return str(size / 1000000.0)
def exists(self):
return os.path.exists(self.path)
def acquire(self, disk):
if self.master in (None, disk):
self.master = disk
else:
raise errors.LockedImageError(self, self.master)
def release(self, disk):
if self.master is disk:
self.master = None
else:
raise errors.LockedImageError(self, self.master)
def save_to(self, fileobj):
fileobj.write("[Image:{0.name}]\npath={0.path}\n\n".format(self))
def __format__(self, format_string):
if format_string in ("n", ""):
return str(self.name)
elif format_string == "p":
return str(self.path)
elif format_string == "d":
return str(self.get_description())
elif format_string == "m":
if self.master is None:
return ""
return repr(self.master)
elif format_string == "s":
return self.get_size()
raise ValueError("invalid format string " + repr(format_string))
def move(src, dst):
try:
os.rename(src, dst)
except OSError as e:
if e.errno == errno.EXDEV:
shutil.move(src, dst)
else:
raise
def is_missing(path, file):
return not os.access(os.path.join(path, file), os.X_OK)
class Disk:
sync_cmd = "sync"
image = None
@property
def cow(self):
return self.VM.config["private" + self.device]
@property
def basefolder(self):
return project.manager.current.path
@property
def vm_name(self):
return self.VM.name
def __init__(self, VM, dev):
self.VM = VM
self.device = dev
def _virtio_args_cb(self, disk_name):
return ["-drive", "file={0},if=virtio".format(disk_name)]
def _args_cb(self, disk_name):
return ["-" + self.device, disk_name]
def args(self):
if self.image:
d = self.get_real_disk_name()
if self.VM.get("use_virtio"):
d.addCallback(self._virtio_args_cb)
else:
d.addCallback(self._args_cb)
return d
else:
return defer.succeed([])
def set_image(self, image):
self.image = image
def acquire(self):
if self.image and not self.cow and not self.readonly():
self.image.acquire(self)
def release(self):
if self.image and not self.cow and not self.readonly():
self.image.release(self)
def _get_base(self):
return self.image.path
def _sync(self, ret):
def complain_on_error(ret):
out, err, code = ret
if code != 0:
raise RuntimeError("sync failed\n%s" % err)
out, err, code = ret
if code != 0:
raise RuntimeError("Cannot create private COW\n%s" % err)
exit = utils.getProcessOutputAndValue(self.sync_cmd, env=os.environ)
exit.addCallback(complain_on_error)
return exit
def _create_cow(self, cowname):
if is_missing(settings.get("qemupath"), "qemu-img"):
msg = _("qemu-img not found! I can't create a new image.")
return defer.fail(errors.BadConfigError(msg))
logger.info(new_cow, base=self._get_base())
args = ["create", "-b", self._get_base(), "-f",
settings.get("cowfmt"), cowname]
exe = os.path.join(settings.get("qemupath"), "qemu-img")
exit = utils.getProcessOutputAndValue(exe, args, os.environ)
exit.addCallback(self._sync)
exit.addCallback(lambda _: cowname)
return exit
def _check_base(self, cowname):
with open(cowname) as fp:
backing_file = tools.get_backing_file(fp)
if backing_file == self._get_base():
return defer.succeed(cowname)
else:
dt = datetime.datetime.now()
cowback = cowname + ".back-" + dt.strftime("%Y-%m-%d_%H-%M-%S")
logger.debug(invalid_base, cowname=cowname, base=backing_file,
path=cowback)
move(cowname, cowback)
return self._create_cow(cowname).addCallback(lambda _: cowname)
def _get_cow_name(self):
try:
os.makedirs(self.basefolder)
except OSError as e:
if e.errno != errno.EEXIST:
raise
cowname = self.get_cow_path()
try:
return self._check_base(cowname)
except IOError, e:
if e.errno == errno.ENOENT:
return self._create_cow(cowname)
else:
raise
def get_cow_path(self):
return os.path.join(self.basefolder, "%s_%s.cow" % (self.vm_name,
self.device))
def get_real_disk_name(self):
if self.image is None:
# XXX: this should be really an error
return defer.succeed("")
elif self.cow:
try:
return self._get_cow_name()
except (OSError, IOError) as e:
return defer.fail(e)
else:
return defer.succeed(self.image.path)
def readonly(self):
return self.VM.config["snapshot"]
def __deepcopy__(self, memo):
new = type(self)(self.VM, self.device)
new.sync_cmd = self.sync_cmd
if self.image is not None:
new.set_image(self.image)
return new
def __repr__(self):
return "<Disk {self.device}({self.vm_name}) image={self.image:p} " \
"readonly={readonly} cow={self.cow}>".format(
self=self, readonly=self.readonly())
VM_COMMAND_BUILDER = {
"#argv0": "argv0",
"#M": "machine",
"#cpu": "cpu",
"-smp": "smp",
"-m": "ram",
"-boot": "boot",
# numa not supported
"#privatehda": "privatehda",
"#privatehdb": "privatehdb",
"#privatehdc": "privatehdc",
"#privatehdd": "privatehdd",
"#privatefda": "privatefda",
"#privatefdb": "privatefdb",
"#privatemtdblock": "privatemtdblock",
"#cdrom": "cdrom",
"#device": "device",
"#cdromen": "cdromen",
"#deviceen": "deviceen",
"#keyboard": "keyboard",
"#usbdevlist": "usbdevlist",
"-soundhw": "soundhw",
"-usb": "usbmode",
# "-uuid": "uuid",
# "-curses": "curses", ## not implemented
# "-no-frame": "noframe", ## not implemented
# "-no-quit": "noquit", ## not implemented.
"-snapshot": "snapshot",
"#vga": "vga",
"#vncN": "vncN",
"#vnc": "vnc",
# "-full-screen": "full-screen", ## TODO 0.3
"-sdl": "sdl",
"-portrait": "portrait",
"-win2k-hack": "win2k", # not implemented
"-no-acpi": "noacpi",
# "-no-hpet": "nohpet", ## ???
# "-baloon": "baloon", ## ???
# #acpitable not supported
# #smbios not supported
"#kernel": "kernel",
"#kernelenbl": "kernelenbl",
"#append": "kopt",
"#initrd": "initrd",
"#initrdenbl": "initrdenbl",
# "-serial": "serial",
# "-parallel": "parallel",
# "-monitor": "monitor",
# "-qmp": "qmp",
# "-mon": "",
# "-pidfile": "", ## not needed
# "-singlestep": "",
# "-S": "",
"#gdb_e": "gdb",
"#gdb_port": "gdbport",
# "-s": "",
# "-d": "",
# "-hdachs": "",
# "-L": "",
# "-bios": "",
"#kvm": "kvm",
# "-no-reboot": "", ## not supported
# "-no-shutdown": "", ## not supported
"-loadvm": "loadvm",
# "-daemonize": "", ## not supported
# "-option-rom": "",
# "-clock": "",
"#rtc": "rtc",
# "-icount": "",
# "-watchdog": "",
# "-watchdog-action": "",
# "-echr": "",
# "-virtioconsole": "", ## future
# "-show-cursor": "",
# "-tb-size": "",
# "-incoming": "",
# "-nodefaults": "",
# "-chroot": "",
# "-runas": "",
# "-readconfig": "",
# "-writeconfig": "",
# "-no-kvm": "", ## already implemented otherwise
# "-no-kvm-irqchip": "",
# "-no-kvm-pit": "",
# "-no-kvm-pit-reinjection": "",
# "-pcidevice": "",
# "-enable-nesting": "",
# "-nvram": "",
"-tdf": "tdf",
"#kvmsm": "kvmsm",
"#kvmsmem": "kvmsmem",
# "-mem-path": "",
# "-mem-prealloc": "",
"#icon": "icon",
"#serial": "serial",
"#stdout": ""}
class DefaultDevice:
def __ne__(self, other):
if isinstance(other, Disk):
return other.image is not None
return NotImplemented
def __eq__(self, other):
return not self != other
default_device = DefaultDevice()
class Device(bricks.Parameter):
def __init__(self, name):
self.name = name
bricks.Parameter.__init__(self, default_device)
def from_string_brick(self, in_string, brick):
disk = brick.config[self.name]
disk.set_image(brick.factory.get_image_by_name(in_string))
return disk
def to_string(self, disk):
if disk.image is not None:
return disk.image.name
return ""
class UsbDeviceParameter(bricks.String):
def from_string(self, in_string):
return UsbDevice(in_string)
def to_string(self, in_object):
return str(in_object)
class VirtualMachineConfig(bricks.Config):
parameters = {"name": bricks.String(""),
# boot options
"boot": bricks.String(""),
"snapshot": bricks.Boolean(False),
# cdrom device
"deviceen": bricks.Boolean(False),
"device": bricks.String(""),
"cdromen": bricks.Boolean(False),
"cdrom": bricks.String(""),
# additional media
"use_virtio": bricks.Boolean(False),
"hda": Device("hda"),
"privatehda": bricks.Boolean(False),
"hdb": Device("hdb"),
"privatehdb": bricks.Boolean(False),
"hdc": Device("hdc"),
"privatehdc": bricks.Boolean(False),
"hdd": Device("hdd"),
"privatehdd": bricks.Boolean(False),
"fda": Device("fda"),
"privatefda": bricks.Boolean(False),
"fdb": Device("fdb"),
"privatefdb": bricks.Boolean(False),
"mtdblock": Device("mtdblock"),
"privatemtdblock": bricks.Boolean(False),
# system and machine
"argv0": bricks.String("qemu-system-i386"),
"cpu": bricks.String(""),
"machine": bricks.String(""),
"kvm": bricks.Boolean(False),
"smp": bricks.SpinInt(1, 1, 64),
# audio device soundcard
"soundhw": bricks.String(""),
# memory device settings
"ram": bricks.SpinInt(64, 1, 99999),
"kvmsm": bricks.Boolean(False),
"kvmsmem": bricks.SpinInt(1, 0, 99999),
# display options
"novga": bricks.Boolean(False),
"vga": bricks.Boolean(False),
"vnc": bricks.Boolean(False),
"vncN": bricks.SpinInt(1, 0, 500),
"sdl": bricks.Boolean(False),
"portrait": bricks.Boolean(False),
# usb settings
"usbmode": bricks.Boolean(False),
"usbdevlist": bricks.ListOf(UsbDeviceParameter("")),
# extra settings
"rtc": bricks.Boolean(False),
"tdf": bricks.Boolean(False),
"keyboard": bricks.String(""),
"serial": bricks.Boolean(False),
# booting linux
"kernelenbl": bricks.Boolean(False),
"kernel": bricks.String(""),
"initrdenbl": bricks.Boolean(False),
"initrd": bricks.String(""),
"kopt": bricks.String(""),
"gdb": bricks.Boolean(False),
"gdbport": bricks.SpinInt(1234, 1, 65535),
# virtual machine icon
"icon": bricks.String(""),
# others
"noacpi": bricks.String(""),
"stdout": bricks.String(""),
"loadvm": bricks.String("")}
def _get_nick(link):
if hasattr(link, "sock"):
return str(getattr(link.sock, "nickname", "None"))
return "None"
class VirtualMachine(bricks.Brick):
type = "Qemu"
term_command = "unixterm"
command_builder = VM_COMMAND_BUILDER
config_factory = VirtualMachineConfig
process_protocol = bricks.Process
def __init__(self, factory, name):
bricks.Brick.__init__(self, factory, name)
self._observable.add_event("image-changed")
self.image_changed = observable.Event(self._observable,
"image-changed")
self.config["name"] = name
for dev in "hda", "hdb", "hdc", "hdd", "fda", "fdb", "mtdblock":
self.config[dev] = Disk(self, dev)
def poweron(self, snapshot=""):
def acquire(passthru):
self.acquire()
return passthru
def release(passthru):
self.release()
return passthru
def clear_snapshot(passthru):
self.config["loadvm"] = ""
return passthru
self.config["loadvm"] = snapshot
d = bricks.Brick.poweron(self)
d.addCallback(acquire).addBoth(clear_snapshot)
self._exited_d.addBoth(release)
return d
def poweroff(self, kill=False, term=False):
if self.proc is None:
return defer.succeed((self, self._last_status))
elif not any((kill, term)):
self.logger.info(powerdown, vm=self)
self.send("system_powerdown\n")
return self._exited_d
if term:
return bricks.Brick.poweroff(self)
else:
return bricks.Brick.poweroff(self, kill)
def get_parameters(self):
ram = self.config["ram"]
txt = [_("command:") + " %s, ram: %s" % (self.prog(), ram)]
for i, link in enumerate(itertools.chain(self.plugs, self.socks)):
txt.append("eth%d: %s" % (i, _get_nick(link)))
return ", ".join(txt)
def update_usbdevlist(self, dev):
self.logger.debug(update_usb, old=self.config["usbdevlist"], new=dev)
for device in set(dev) - set(self.config["usbdevlist"]):
self.send("usb_add host:{0}\n".format(device))
# FIXME: Don't know how to remove old devices, due to the ugly syntax
# of usb_del command.
def configured(self):
# return all([p.configured() for p in self.plugs])
for p in self.plugs:
if p.sock is None and p.mode == 'vde':
return False
return True
def prog(self):
if self.config["argv0"] and not self.config["kvm"]:
return os.path.join(settings.get("qemupath"), self.config["argv0"])
elif self.config["kvm"]:
return os.path.join(settings.get("qemupath"), "kvm")
else:
return os.path.join(settings.get("qemupath"), "qemu")
def args(self):
d = defer.gatherResults([disk.args() for disk in self.disks()])
d.addCallback(self.__args)
return d
def __args(self, results):
res = [self.prog()]
if not self.config["kvm"]:
if self.config["machine"] != "":
res.extend(["-M", self.config["machine"]])
if self.config["cpu"]:
res.extend(["-cpu", self.config["cpu"]])
res.extend(list(self.build_cmd_line()))
if self.config["novga"]:
res.extend(["-display", "none"])
for disk_args in results:
res.extend(disk_args)
if self.config["kernelenbl"] and self.config["kernel"]:
res.extend(["-kernel", self.config["kernel"]])
if self.config["initrdenbl"] and self.config["initrd"]:
res.extend(["-initrd", self.config["initrd"]])
if (self.config["kopt"] and self.config["kernelenbl"] and
self.config["kernel"]):
res.extend(["-append", "'" + re.sub("\"", "", self.config["kopt"])
+ "'"])
if self.config["gdb"]:
res.extend(["-gdb", "tcp::%d" % self.config["gdbport"]])
if self.config["vnc"]:
res.extend(["-vnc", ":%d" % self.config["vncN"]])
if self.config["vga"]:
res.extend(["-vga", "std"])
if self.config["usbmode"]:
for dev in self.config["usbdevlist"]:
res.extend(["-usbdevice", "host:%s" % dev])
res.extend(["-name", self.name])
if not self.plugs and not self.socks:
res.extend(["-net", "none"])
else:
for i, link in enumerate(itertools.chain(self.plugs, self.socks)):
res.append("-device")
res.append("{1.model},vlan={0},mac={1.mac},id=eth{0}".format(
i, link))
if link.sock and link.sock.mode == "hostonly":
res.extend(("-net", "user,vlan={0}".format(i)))
elif link.mode == "vde":
res.append("-net")
res.append("vde,vlan={0},sock={1}".format(
i, link.sock.path.rstrip('[]')))
elif link.mode == "sock":
res.append("-net")
res.append("vde,vlan={0},sock={1}".format(
i, link.path))
else:
res.extend(["-net", "user"])
if self.config["cdromen"] and self.config["cdrom"]:
res.extend(["-cdrom", self.config["cdrom"]])
elif self.config["deviceen"] and self.config["device"]:
res.extend(["-cdrom", self.config["device"]])
if self.config["rtc"]:
res.extend(["-rtc", "base=localtime"])
if len(self.config["keyboard"]) == 2:
res.extend(["-k", self.config["keyboard"]])
if self.config["kvmsm"]:
res.extend(["-kvm-shadow-memory", self.config["kvmsmem"]])
if self.config["serial"]:
res.extend(["-serial", "unix:%s/%s_serial,server,nowait" %
(settings.VIRTUALBRICKS_HOME, self.name)])
res.extend(["-mon", "chardev=mon", "-chardev",
"socket,id=mon,path=%s,server,nowait" %
self.console(),
"-mon", "chardev=mon_cons", "-chardev",
"stdio,id=mon_cons,signal=off"])
return res
def add_sock(self, mac=None, model=None):
s = self.factory.new_sock(self)
sock = VMSock(s)
vlan = len(self.plugs) + len(self.socks)
sock.path = "{0}/{1.brick.name}_sock_eth{2}[]".format(
settings.VIRTUALBRICKS_HOME, sock, vlan)
sock.nickname = "{0.brick.name}_sock_eth{1}".format(sock, vlan)
self.socks.append(sock)
if mac:
sock.mac = mac
if model:
sock.model = model
return sock
def add_plug(self, sock, mac=None, model=None):
plug = VMPlug(self.factory.new_plug(self))
self.plugs.append(plug)
if sock:
plug.connect(sock)
if mac:
plug.mac = mac
if model:
plug.model = model
return plug
def connect(self, sock, *args):
self.add_plug(sock, *args)
def remove_plug(self, plug):
try:
if plug.mode == "sock":
self.socks.remove(plug)
else:
self.plugs.remove(plug)
except ValueError:
self.logger.error(own_err, plug=plug, brick=self)
def commit_disks(self, args):
# XXX: fixme
self.send("commit all\n")
def acquire(self):
"""Acquire locks on images if needed."""
self.logger.debug(acquire_lock)
acquired = []
for disk in self.disks():
try:
disk.acquire()
except errors.LockedImageError:
for _disk in acquired:
_disk.release()
raise
else:
acquired.append(disk)
def release(self):
self.logger.debug(release_lock)
for disk in self.disks():
disk.release()
def disks(self):
for hd in "hda", "hdb", "hdc", "hdd", "fda", "fdb", "mtdblock":
yield self.config[hd]
def set_image(self, disk, image):
self.config[disk].image = image
if not self._restore:
self._observable.notify("image-changed", (self, image))
def set_vm(self, disk):
disk.VM = self
cbset_hda = cbset_hdb = cbset_hdc = cbset_hdd = cbset_fda = cbset_fdb = \
cbset_mtblock = set_vm
def is_virtualmachine(brick):
return brick.get_type() == "Qemu"
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