core-admin/qvm-tools/qvm-pci

#!/usr/bin/python2
# -*- encoding: utf8 -*-
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2010  Marek Marczykowski <marmarek@mimuw.edu.pl>
#
# 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.
#
#

from qubes.qubes import QubesVmCollection
from optparse import OptionParser
import subprocess
import os
import sys
from qubes.qubes import vmm
import re


def find_devices_of_class(klass):
    p = subprocess.Popen(["/sbin/lspci", "-mm", "-n"], stdout=subprocess.PIPE)
    result = p.communicate()
    retcode = p.returncode
    if retcode != 0:
        print "ERROR when executing lspci!"
        raise IOError

    rx_netdev = re.compile(r"^([0-9a-f]{2}:[0-9a-f]{2}.[0-9a-f]) \"" +
                           klass)
    for dev in str(result[0]).splitlines():
        match = rx_netdev.match(dev)
        if match is not None:
            dev_bdf = match.group(1)
            assert dev_bdf is not None
            yield dev_bdf


def main():
    usage = "usage: %prog -l [options] <vm-name>\n"\
            "usage: %prog -a [options] <vm-name> <device>\n"\
            "usage: %prog -d [options] <vm-name> <device>\n"\
            "List/set VM PCI devices."

    parser = OptionParser (usage)
    parser.add_option ("-l", "--list", action="store_true", dest="do_list", default=False)
    parser.add_option ("-a", "--add", action="store_true", dest="do_add", default=False)
    parser.add_option ("-d", "--delete", action="store_true", dest="do_delete", default=False)
    parser.add_option("-C", "--add-class", action="store_true",
                      dest="do_add_class", default=False,
                      help="Add all devices of given class (net, usb)")
    parser.add_option ("--offline-mode", dest="offline_mode",
                       action="store_true", default=False,
                       help="Offline mode")

    (options, args) = parser.parse_args ()
    if (len (args) < 1):
        parser.error ("You must provide at least the vmname!")

    vmname = args[0]

    if options.do_list + options.do_add + options.do_delete + \
            options.do_add_class > 1:
        print >> sys.stderr, "Only one of -l -a -d -C is allowed!"
        exit(1)

    if options.offline_mode:
        vmm.offline_mode = True

    if options.do_add or options.do_delete or options.add_class:
        qvm_collection = QubesVmCollection()
        qvm_collection.lock_db_for_writing()
        qvm_collection.load()
    else:
        qvm_collection = QubesVmCollection()
        qvm_collection.lock_db_for_reading()
        qvm_collection.load()
        qvm_collection.unlock_db()

    vm = qvm_collection.get_vm_by_name(vmname)
    if vm is None or vm.qid not in qvm_collection:
        print >> sys.stderr, "A VM with the name '{0}' does not exist in the system.".format(vmname)
        exit(1)

    if options.do_add:
        if len (args) < 2:
            print >> sys.stderr, "You must specify the PCI device to add"
            exit (1)

        pci = args[1]
        vm.pci_add(pci)
        qvm_collection.save()
        qvm_collection.unlock_db()

    elif options.do_add_class:
        if len(args) < 2:
            print >> sys.stderr, "You must specify the PCI device class to add"
            exit(1)

        klass = args[1]

        if klass == 'net':
            devs = find_devices_of_class("02")
        elif klass == 'usb':
            devs = find_devices_of_class("0c03")
        else:
            print >> sys.stderr, "Supported classes: net, usb"
            exit(1)

        for dev in devs:
            vm.pci_add(dev)

    elif options.do_delete:
        if len (args) < 2:
            print >> sys.stderr, "You must specify the PCI device to delete"
            exit (1)

        pci = args[1]
        vm.pci_remove(pci)
        qvm_collection.save()
        qvm_collection.unlock_db()

    else: 
        # do_list
        print str(vm.pcidevs)

main()