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#!/usr/bin/python
import sys, os, time, re
import optparse, commands
import ConfigParser, StringIO
class ShellConfigParser(ConfigParser.ConfigParser):
def read(self, filename):
try:
text = open(filename).read()
except IOError:
pass
else:
file = StringIO.StringIO("[shell]\n" + text)
self.readfp(file, filename)
config = ShellConfigParser()
config.read('config.mak')
external_module = config.get('shell', 'want_module')
optparser = optparse.OptionParser()
optparser.add_option('--no-reload-module',
help = 'do not reload kvm module',
action = 'store_false',
dest = 'reload',
default = True,
)
optparser.add_option('--install',
help = 'start up guest in installer boot cd',
action = 'store_true',
default = False,
)
optparser.add_option('-m', '--memory',
help = 'guest memory in MB',
type = 'int',
default = 384,
dest = 'memory',
)
optparser.add_option('--debugger',
help = 'wait for gdb',
action = 'store_true',
default = False,
)
optparser.add_option('--no-tap',
help = 'run the guest without tap netif',
action = 'store_true',
dest = 'notap',
default = False,
)
optparser.add_option('--mac',
help = 'use this specific mac addr',
dest = 'mac',
default = None,
)
optparser.add_option('--vnc',
help = 'use VNC rather than SDL',
dest = 'vnc',
default = None,
)
optparser.add_option('--no-kvm',
help = 'use standard qemu, without kvm',
action = 'store_false',
dest = 'kvm',
default = True,
)
optparser.add_option('--image',
help = 'select disk image',
dest = 'image',
default = '/tmp/disk',
)
optparser.add_option('--cdrom',
help = 'select cdrom image',
dest = 'cdrom',
default = None,
)
optparser.add_option('--loadvm',
help = 'select saved vm-image',
dest = 'saved_image',
default = None,
)
optparser.add_option('--monitor',
help = 'redirect monitor (currently only stdio or tcp)',
dest = 'monitor',
default = None,
)
optparser.add_option('--stopped',
help = 'start image in stopped mode',
action = 'store_true',
default = False,
)
optparser.add_option('-n', '--dry-run',
help = "just print the qemu command line; don't run it",
action = 'store_true',
dest = 'dry_run',
default = False,
)
(options, args) = optparser.parse_args()
if len(args) > 0:
options.image = args[0]
if len(args) > 1:
options.cdrom = args[1]
def remove_module(module):
module = module.replace('-', '_')
lines = commands.getoutput('/sbin/lsmod').split('\n')
for x in lines:
if x.startswith(module + ' '):
if os.spawnl(os.P_WAIT, '/sbin/rmmod', 'rmmod', module) != 0:
raise Exception('failed to remove %s module' % (module,))
def insert_module(module):
if os.spawnl(os.P_WAIT, '/sbin/insmod', 'insmod',
'kernel/%s.ko' % (module,)) != 0:
raise Exception('failed to load kvm module')
def probe_module(module):
if os.spawnl(os.P_WAIT, '/sbin/modprobe', 'modprobe', module) != 0:
raise Exception('failed to load kvm module')
def vendor():
for x in file('/proc/cpuinfo').readlines():
m = re.match(r'vendor_id[ \t]*: *([a-zA-Z]+),*', x)
if m:
return m.group(1)
return unknown
vendor_module = {
'GenuineIntel': 'kvm-intel',
'AuthenticAMD': 'kvm-amd',
}[vendor()]
if options.kvm and options.reload:
for module in [vendor_module, 'kvm']:
remove_module(module)
if external_module:
insmod = insert_module
else:
insmod = probe_module
for module in ['kvm', vendor_module]:
insmod(module)
commands.getstatusoutput('/sbin/udevsettle')
if not os.access('/dev/kvm', os.F_OK):
print '/dev/kvm not present'
disk = options.image
if options.install:
(status, output) = commands.getstatusoutput(
'qemu/qemu-img create -f qcow2 "%s" 10G' % disk)
if status:
raise Exception, output
bootdisk = 'c'
if options.install:
bootdisk = 'd'
import platform
arch = platform.machine()
# check 32-bit userspace on 64-bit kernel
if platform.architecture()[0] == '32bit':
arch = 'i386'
if arch == 'x86_64':
cmd = 'qemu-system-' + arch
else:
cmd = 'qemu'
local_cmd = 'qemu/' + arch + '-softmmu/' + cmd
if os.access(local_cmd, os.F_OK):
cmd = local_cmd
else:
cmd = '/usr/bin/kvm'
qemu_args = (cmd, '-boot', bootdisk,
'-hda', disk, '-m', str(options.memory),
'-serial', 'file:/tmp/serial.log',
#'-usbdevice', 'tablet',
)
if options.cdrom:
qemu_args += ('-cdrom', options.cdrom,)
if not options.kvm:
qemu_args += ('-no-kvm',)
if options.debugger:
qemu_args += ('-s',)
if not options.notap:
mac = options.mac
if not mac:
for line in commands.getoutput('/sbin/ip link show eth0').splitlines():
m = re.match(r'.*link/ether (..:..:..:..:..:..).*', line)
if m:
mac = m.group(1)
if not mac:
raise Exception, 'Unable to determine eth0 mac address'
mac_components = mac.split(':')
mac_components[0] = 'a0'
mac = ':'.join(mac_components)
qemu_args += ('-net', 'nic,macaddr=%s,model=rtl8139' % (mac,),
'-net', 'tap,script=/etc/kvm/qemu-ifup',)
if options.vnc:
qemu_args += ('-vnc', str(options.vnc))
if options.saved_image:
qemu_args += ('-loadvm' , options.saved_image, )
if options.monitor:
if options.monitor == 'stdio':
qemu_args += ('-monitor' , 'stdio', )
elif options.monitor == 'tcp':
qemu_args += ('-monitor' , 'tcp:0:5555,server,nowait', )
else:
raise Exception('illegal monitor option %s' % option.monitor)
if options.stopped:
qemu_args += ('-S',)
if options.dry_run:
def concat_func(x,y): return x + ' ' + y
print reduce(concat_func, qemu_args)
sys.exit(0)
os.execvp(cmd, qemu_args)
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