def _prepareVolumePathFromPayload(self, vmId, device, payload):
"""
param vmId:
VM UUID or None
param device:
either 'floppy' or 'cdrom'
param payload:
a dict formed like this:
{'volId': 'volume id', # volId is optional
'file': {'filename': 'content', ...}}
"""
funcs = {'cdrom': 'mkIsoFs', 'floppy': 'mkFloppyFs'}
if device not in funcs:
raise vm.VolumeError("Unsupported 'device': %s" % device)
func = getattr(supervdsm.getProxy(), funcs[device])
return func(vmId, payload['file'], payload.get('volId'))
def prepareVolumePath(self, drive, vmId=None):
if type(drive) is dict:
device = drive['device']
# PDIV drive format
if device == 'disk' and isVdsmImage(drive):
res = self.irs.prepareImage(drive['domainID'], drive['poolID'],
drive['imageID'],
drive['volumeID'])
if res['status']['code']:
raise vm.VolumeError(drive)
volPath = res['path']
# The order of imgVolumesInfo is not guaranteed
drive['volumeChain'] = res['imgVolumesInfo']
drive['volumeInfo'] = res['info']
# GUID drive format
elif "GUID" in drive:
res = self.irs.getDevicesVisibility([drive["GUID"]])
if not res["visible"][drive["GUID"]]:
raise vm.VolumeError(drive)
res = self.irs.appropriateDevice(drive["GUID"], vmId)
if res['status']['code']:
raise vm.VolumeError(drive)
# Update size for LUN volume
drive["truesize"] = res['truesize']
drive["apparentsize"] = res['apparentsize']
volPath = res['path']
# UUID drive format
elif "UUID" in drive:
volPath = self._getUUIDSpecPath(drive["UUID"])
# cdrom and floppy drives
elif (device in ('cdrom', 'floppy') and 'specParams' in drive):
params = drive['specParams']
if 'vmPayload' in params:
volPath = self._prepareVolumePathFromPayload(
vmId, device, params['vmPayload'])
# next line can be removed in future, when < 3.3 engine
# is not supported
elif (params.get('path', '') == ''
and drive.get('path', '') == ''):
volPath = ''
else:
volPath = drive.get('path', '')
elif "path" in drive:
volPath = drive['path']
else:
raise vm.VolumeError(drive)
# For BC sake: None as argument
elif not drive:
volPath = drive
# For BC sake: path as a string.
elif os.path.exists(drive):
volPath = drive
else:
raise vm.VolumeError(drive)
self.log.info("prepared volume path: %s", volPath)
return volPath
def _getUUIDSpecPath(self, uuid):
try:
return blkid.getDeviceByUuid(uuid)
except blkid.BlockIdException:
self.log.info('Error finding path for device', exc_info=True)
raise vm.VolumeError(uuid)
