269 lines
9.3 KiB
Python
269 lines
9.3 KiB
Python
#!/usr/bin/python2
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2011 Marek Marczykowski <marmarek@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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from qubes import QubesVm,QubesException
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from qubes import xs, xl_ctx, qubes_guid_path, qubes_clipd_path, qrexec_client_path
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import sys
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import os
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#import os.path
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import subprocess
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#import fcntl
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import re
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#import shutil
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#import uuid
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#import time
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from datetime import datetime
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from qmemman_client import QMemmanClient
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import xen.lowlevel.xc
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import xen.lowlevel.xl
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import xen.lowlevel.xs
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def mbytes_to_kmg(size):
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if size > 1024:
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return "%d GB" % (size/1024)
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else:
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return "%d MB" % size
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def kbytes_to_kmg(size):
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if size > 1024:
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return mbytes_to_kmg(size/1024)
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else:
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return "%d KB" % size
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def bytes_to_kmg(size):
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if size > 1024:
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return kbytes_to_kmg(size/1024)
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else:
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return "%d B" % size
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def block_devid_to_name(devid):
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major = devid / 256
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minor = devid % 256
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dev_class = ""
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if major == 202:
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dev_class = "xvd"
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elif major == 8:
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dev_class = "sd"
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else:
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raise QubesException("Unknown device class %d" % major)
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if minor % 16 == 0:
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return "%s%c" % (dev_class, ord('a')+minor/16)
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else:
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return "%s%c%d" % (dev_class, ord('a')+minor/16, minor%16)
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def block_name_to_majorminor(name):
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# check if it is already devid
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if isinstance(name, int):
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return (name / 256, name % 256)
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if name.isdigit():
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return (int(name) / 256, int(name) % 256)
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major = 0
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minor = 0
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name_match = re.match(r"([a-z]+)([a-z])([0-9]*)", name)
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if not name_match:
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raise QubesException("Invalid device name: %s" % name)
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disk = True
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if name_match.group(1) == "xvd":
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major = 202
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elif name_match.group(1) == "sd":
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major = 8
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elif name.startswith("scd"):
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disk = False
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major = 11
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elif name.startswith("sr"):
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disk = False
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major = 11
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else:
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raise QubesException("Unknown device type %s" % name_match.group(1))
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if disk:
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minor = (ord(name_match.group(2))-ord('a')) * 16
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else:
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minor = 0
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if name_match.group(3):
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minor += int(name_match.group(3))
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return (major, minor)
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def block_name_to_devid(name):
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# check if it is already devid
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if isinstance(name, int):
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return name
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if name.isdigit():
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return int(name)
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(major, minor) = block_name_to_majorminor(name)
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return major << 8 | minor
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def block_list(vm = None):
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device_re = re.compile(r"^[a-z0-9]{1,8}$")
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# FIXME: any better idea of desc_re?
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desc_re = re.compile(r"^.{1,255}$")
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mode_re = re.compile(r"^[rw]$")
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vm_list = []
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if vm is not None:
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if not vm.is_running():
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return []
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else:
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vm_list = [ str(vm.xid) ]
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else:
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vm_list = xs.ls('', '/local/domain')
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devices_list = {}
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for xid in vm_list:
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vm_name = xs.read('', '/local/domain/%s/name' % xid)
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vm_devices = xs.ls('', '/local/domain/%s/qubes-block-devices' % xid)
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if vm_devices is None:
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continue
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for device in vm_devices:
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# Sanitize device name
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if not device_re.match(device):
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print >> sys.stderr, "Invalid device name in VM '%s'" % vm_name
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continue
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device_size = xs.read('', '/local/domain/%s/qubes-block-devices/%s/size' % (xid, device))
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device_desc = xs.read('', '/local/domain/%s/qubes-block-devices/%s/desc' % (xid, device))
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device_mode = xs.read('', '/local/domain/%s/qubes-block-devices/%s/mode' % (xid, device))
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if not device_size.isdigit():
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print >> sys.stderr, "Invalid %s device size in VM '%s'" % (device, vm_name)
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continue
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if not desc_re.match(device_desc):
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print >> sys.stderr, "Invalid %s device desc in VM '%s'" % (device, vm_name)
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continue
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if not mode_re.match(device_mode):
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print >> sys.stderr, "Invalid %s device mode in VM '%s'" % (device, vm_name)
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continue
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visible_name = "%s:%s" % (vm_name, device)
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devices_list[visible_name] = {"name": visible_name, "xid":int(xid),
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"vm": vm_name, "device":device, "size":int(device_size),
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"desc":device_desc, "mode":device_mode}
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return devices_list
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def block_check_attached(backend_vm, device, backend_xid = None):
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if backend_xid is None:
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backend_xid = backend_vm.xid
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vm_list = xs.ls('', '/local/domain/%d/backend/vbd' % backend_xid)
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if vm_list is None:
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return None
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device_majorminor = block_name_to_majorminor(device)
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for vm_xid in vm_list:
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for devid in xs.ls('', '/local/domain/%d/backend/vbd/%s' % (backend_xid, vm_xid)):
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phys_device = xs.read('', '/local/domain/%d/backend/vbd/%s/%s/physical-device' % (backend_xid, vm_xid, devid))
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if phys_device is None or not phys_device.find(':'):
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# Skip not-phy devices
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continue
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(tmp_major, tmp_minor) = phys_device.split(":")
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tmp_major = int(tmp_major, 16)
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tmp_minor = int(tmp_minor, 16)
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if (tmp_major, tmp_minor) == device_majorminor:
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vm_name = xl_ctx.domid_to_name(int(vm_xid))
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frontend = block_devid_to_name(int(devid))
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return {"xid":int(vm_xid), "frontend": frontend, "devid": int(devid), "vm": vm_name}
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return None
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def block_attach(vm, backend_vm, device, frontend="xvdi", mode="w", auto_detach=False):
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if not vm.is_running():
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raise QubesException("VM %s not running" % vm.name)
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if not backend_vm.is_running():
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raise QubesException("VM %s not running" % backend_vm.name)
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# Check if any device attached at this frontend
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if xs.read('', '/local/domain/%d/device/vbd/%d/state' % (vm.xid, block_name_to_devid(frontend))) == '4':
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raise QubesException("Frontend %s busy in VM %s, detach it first" % (frontend, vm.name))
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# Check if this device is attached to some domain
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attached_vm = block_check_attached(backend_vm, device)
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if attached_vm:
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if auto_detach:
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block_detach(None, attached_vm['devid'], vm_xid=attached_vm['vm_xid'])
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else:
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raise QubesException("Device %s from %s already connected to VM %s as %s" % (device, backend_vm.name, attached_vm['vm'], attached_vm['frontend']))
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xl_cmd = [ '/usr/sbin/xl', 'block-attach', vm.name, 'phy:/dev/' + device, frontend, mode, str(backend_vm.xid) ]
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subprocess.check_call(xl_cmd)
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def block_detach(vm, frontend = "xvdi", vm_xid = None):
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# Get XID if not provided already
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if vm_xid is None:
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if not vm.is_running():
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raise QubesException("VM %s not running" % vm.name)
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# FIXME: potential race
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vm_xid = vm.xid
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# Check if this device is really connected
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if not xs.read('', '/local/domain/%d/device/vbd/%d/state' % (vm_xid, block_name_to_devid(frontend))) == '4':
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# Do nothing - device already detached
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return
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xl_cmd = [ '/usr/sbin/xl', 'block-detach', str(vm_xid), str(frontend)]
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subprocess.check_call(xl_cmd)
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def run_in_vm(vm, command, verbose = True, autostart = False, notify_function = None, passio = False, passio_popen = False, localcmd = None, wait = False):
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assert vm is not None
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if not vm.is_running():
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if not autostart:
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raise QubesException("VM not running")
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try:
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if verbose:
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print >> sys.stderr, "Starting the VM '{0}'...".format(vm.name)
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if notify_function is not None:
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notify_function ("info", "Starting the '{0}' VM...".format(vm.name))
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xid = vm.start(verbose=verbose)
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except (IOError, OSError, QubesException) as err:
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raise QubesException("Error while starting the '{0}' VM: {1}".format(vm.name, err))
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except (MemoryError) as err:
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raise QubesException("Not enough memory to start '{0}' VM! Close one or more running VMs and try again.".format(vm.name))
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xid = vm.get_xid()
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if os.getenv("DISPLAY") is not None and not os.path.isfile("/var/run/qubes/guid_running.{0}".format(xid)):
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vm.start_guid(verbose = verbose, notify_function = notify_function)
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args = [qrexec_client_path, "-d", str(xid), command]
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if localcmd is not None:
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args += [ "-l", localcmd]
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if passio:
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os.execv(qrexec_client_path, args)
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exit(1)
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if passio_popen:
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p = subprocess.Popen (args, stdout=subprocess.PIPE)
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return p
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if not wait:
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args += ["-e"]
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return subprocess.call(args)
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# vim:sw=4:et:
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