def _validate(self, bdm_dict):
"""Basic data format validations."""
dict_fields = set(key for key, _ in six.iteritems(bdm_dict))
# Check that there are no bogus fields
if not (dict_fields <= (self._fields | self._db_only_fields)):
raise exception.InvalidBDMFormat(
details=_("Some fields are invalid."))
if bdm_dict.get('no_device'):
return
# Check that all required fields are there
if (self._required_fields and not (
(dict_fields & self._required_fields) == self._required_fields)):
raise exception.InvalidBDMFormat(
details=_("Some required fields are missing"))
if 'delete_on_termination' in bdm_dict:
bdm_dict['delete_on_termination'] = strutils.bool_from_string(
bdm_dict['delete_on_termination'])
if bdm_dict.get('device_name') is not None:
validate_device_name(bdm_dict['device_name'])
validate_and_default_volume_size(bdm_dict)
if bdm_dict.get('boot_index'):
try:
bdm_dict['boot_index'] = int(bdm_dict['boot_index'])
except ValueError:
raise exception.InvalidBDMFormat(
details=_("Boot index is invalid."))
def validate_device_name(value):
try:
# NOTE (ndipanov): Do not allow empty device names
# until assigning default values
# is supported by compute.compute
utils.check_string_length(value,
'Device name',
min_length=1,
max_length=255)
except exception.InvalidInput:
raise exception.InvalidBDMFormat(
details=_("Device name empty or too long."))
if ' ' in value:
raise exception.InvalidBDMFormat(
details=_("Device name contains spaces."))
def validate_and_default_volume_size(bdm):
if bdm.get('volume_size'):
try:
bdm['volume_size'] = utils.validate_integer(bdm['volume_size'],
'volume_size',
min_value=0)
except exception.InvalidInput:
# NOTE: We can remove this validation code after removing
# Nova v2.0 API code because v2.1 API validates this case
# already at its REST API layer.
raise exception.InvalidBDMFormat(details=_("Invalid volume_size."))
def from_api(cls, api_dict, image_uuid_specified):
"""Transform the API format of data to the internally used one.
Only validate if the source_type field makes sense.
"""
if not api_dict.get('no_device'):
source_type = api_dict.get('source_type')
device_uuid = api_dict.get('uuid')
destination_type = api_dict.get('destination_type')
if source_type not in ('volume', 'image', 'snapshot', 'blank'):
raise exception.InvalidBDMFormat(
details=_("Invalid source_type field."))
elif source_type == 'blank' and device_uuid:
raise exception.InvalidBDMFormat(
details=_("Invalid device UUID."))
elif source_type != 'blank':
if not device_uuid:
raise exception.InvalidBDMFormat(
details=_("Missing device UUID."))
api_dict[source_type + '_id'] = device_uuid
if source_type == 'image' and destination_type == 'local':
try:
boot_index = int(api_dict.get('boot_index', -1))
except ValueError:
raise exception.InvalidBDMFormat(
details=_("Boot index is invalid."))
# if this bdm is generated from --image ,then
# source_type = image and destination_type = local is allowed
if not (image_uuid_specified and boot_index == 0):
raise exception.InvalidBDMFormat(
details=_("Mapping image to local is not supported."))
api_dict.pop('uuid', None)
return cls(api_dict)
def from_legacy(cls, legacy_bdm):
copy_over_fields = bdm_legacy_fields & bdm_new_fields
copy_over_fields |= (bdm_db_only_fields | bdm_db_inherited_fields)
# NOTE (ndipanov): These fields cannot be computed
# from legacy bdm, so do not default them
# to avoid overwriting meaningful values in the db
non_computable_fields = set(
['boot_index', 'disk_bus', 'guest_format', 'device_type'])
new_bdm = {
fld: val
for fld, val in six.iteritems(legacy_bdm)
if fld in copy_over_fields
}
virt_name = legacy_bdm.get('virtual_name')
if is_swap_or_ephemeral(virt_name):
new_bdm['source_type'] = 'blank'
new_bdm['delete_on_termination'] = True
new_bdm['destination_type'] = 'local'
if virt_name == 'swap':
new_bdm['guest_format'] = 'swap'
else:
new_bdm['guest_format'] = CONF.default_ephemeral_format
elif legacy_bdm.get('snapshot_id'):
new_bdm['source_type'] = 'snapshot'
new_bdm['destination_type'] = 'volume'
elif legacy_bdm.get('volume_id'):
new_bdm['source_type'] = 'volume'
new_bdm['destination_type'] = 'volume'
elif legacy_bdm.get('no_device'):
# NOTE (ndipanov): Just keep the BDM for now,
pass
else:
raise exception.InvalidBDMFormat(
details=_("Unrecognized legacy format."))
return cls(new_bdm, non_computable_fields)
def _validate(*args, **kwargs):
raise exception.InvalidBDMFormat(details='Wrong BDM')