def createDevice(self, config):
uname = config.get('uname', '')
try:
(typ, subtyp, params, file) = string.split(uname, ':', 3)
if subtyp not in ('tapdisk', 'ioemu'):
raise ValueError('invalid subtype')
except:
(typ, params, file) = string.split(uname, ':', 2)
subtyp = 'tapdisk'
if typ in ('tap'):
if subtyp in ('tapdisk', 'ioemu'):
if params not in blktap2_disk_types or \
TapdiskController.check():
# pass this device off to BlktapController
log.warn('WARNING: using deprecated blktap module')
self.deviceClass = 'tap'
devid = BlktapController.createDevice(self, config)
self.deviceClass = 'tap2'
return devid
device = TapdiskController.create(params, file)
# modify the configutration to create a blkback for the underlying
# blktap2 device. Note: we need to preserve the original tapdisk uname
# (it is used during save/restore and for managed domains).
config.update({'tapdisk_uname' : uname})
config.update({'uname' : 'phy:' + device.rstrip()})
devid = BlkifController.createDevice(self, config)
config.update({'uname' : uname})
config.pop('tapdisk_uname')
return devid
def createDevice(self, config):
uname = config.get('uname', '')
try:
(typ, subtyp, params, file) = string.split(uname, ':', 3)
if subtyp not in ('tapdisk', 'ioemu'):
raise ValueError('invalid subtype')
except:
(typ, params, file) = string.split(uname, ':', 2)
subtyp = 'tapdisk'
#check for blktap2 installation.
blktap2_installed=0;
(rc,stdout, stderr) = doexec("cat /proc/devices");
out = stdout.read();
stdout.close();
stderr.close();
if( out.find("blktap2") >= 0 ):
blktap2_installed=1;
if typ in ('tap'):
if subtyp in ('tapdisk', 'ioemu'):
if params not in blktap2_disk_types or not blktap2_installed:
# pass this device off to BlktapController
log.warn('WARNING: using deprecated blktap module')
self.deviceClass = 'tap'
devid = BlktapController.createDevice(self, config)
self.deviceClass = 'tap2'
return devid
if self.vm.image and self.vm.image.memory_sharing:
cmd = [ TAPDISK_BINARY, '-n', '%s:%s' % (params, file), '-s', '%d' % self.vm.getDomid() ]
else:
cmd = [ TAPDISK_BINARY, '-n', '%s:%s' % (params, file) ]
(rc,stdout,stderr) = doexec(cmd)
if rc != 0:
err = stderr.read();
out = stdout.read();
stdout.close();
stderr.close();
raise Exception, 'Failed to create device.\n stdout: %s\n stderr: %s\nCheck that target \"%s\" exists and that blktap2 driver installed in dom0.' % (out.rstrip(), err.rstrip(), file);
minor, device, control = parseDeviceString(stdout.readline())
stdout.close();
stderr.close();
# modify the configutration to create a blkback for the underlying
# blktap2 device. Note: we need to preserve the original tapdisk uname
# (it is used during save/restore and for managed domains).
config.update({'tapdisk_uname' : uname})
config.update({'uname' : 'phy:' + device.rstrip()})
devid = BlkifController.createDevice(self, config)
config.update({'uname' : uname})
config.pop('tapdisk_uname')
return devid
def createDevice(self, config):
uname = config.get('uname', '')
try:
(typ, subtyp, params, file) = string.split(uname, ':', 3)
except:
(typ, params, file) = string.split(uname, ':', 2)
subtyp = 'tapdisk'
#check for blktap2 installation.
blktap2_installed=0;
(rc,stdout, stderr) = doexec("cat /proc/devices");
out = stdout.read();
stdout.close();
stderr.close();
if( out.find("blktap2") >= 0 ):
blktap2_installed=1;
if typ in ('tap'):
if subtyp in ('tapdisk'):
if params not in blktap2_disk_types or not blktap2_installed:
# pass this device off to BlktapController
log.warn('WARNING: using deprecated blktap module')
self.deviceClass = 'tap'
devid = BlktapController.createDevice(self, config)
self.deviceClass = 'tap2'
return devid
cmd = [ TAPDISK_BINARY, '-n', '%s:%s' % (params, file) ]
(rc,stdout,stderr) = doexec(cmd)
if rc != 0:
err = stderr.read();
out = stdout.read();
stdout.close();
stderr.close();
raise Exception, 'Failed to create device.\n stdout: %s\n stderr: %s\nCheck that target \"%s\" exists and that blktap2 driver installed in dom0.' % (out.rstrip(), err.rstrip(), file);
minor, device, control = parseDeviceString(stdout.readline())
stdout.close();
stderr.close();
# modify the configutration to create a blkback for the underlying
# blktap2 device. Note: we need to preserve the original tapdisk uname
# (it is used during save/restore and for managed domains).
config.update({'tapdisk_uname' : uname})
config.update({'uname' : 'phy:' + device.rstrip()})
devid = BlkifController.createDevice(self, config)
config.update({'uname' : uname})
config.pop('tapdisk_uname')
return devid
