59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
# Copyright (c) 2014 Navneet Singh. All rights reserved.
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# Copyright (c) 2014 Clinton Knight. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Utilities for NetApp E-series drivers.
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"""
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import base64
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import binascii
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import uuid
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from oslo_log import log as logging
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import six
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LOG = logging.getLogger(__name__)
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MULTI_ATTACH_HOST_GROUP_NAME = 'cinder-multi-attach'
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NULL_REF = '0000000000000000000000000000000000000000'
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MAX_LUNS_PER_HOST = 256
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MAX_LUNS_PER_HOST_GROUP = 256
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def encode_hex_to_base32(hex_string):
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"""Encodes hex to base32 bit as per RFC4648."""
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bin_form = binascii.unhexlify(hex_string)
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return base64.b32encode(bin_form)
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def decode_base32_to_hex(base32_string):
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"""Decodes base32 string to hex string."""
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bin_form = base64.b32decode(base32_string)
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return binascii.hexlify(bin_form)
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def convert_uuid_to_es_fmt(uuid_str):
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"""Converts uuid to e-series compatible name format."""
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uuid_base32 = encode_hex_to_base32(uuid.UUID(six.text_type(uuid_str)).hex)
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return str(uuid_base32.strip(b'='))
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def convert_es_fmt_to_uuid(es_label):
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"""Converts e-series name format to uuid."""
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if es_label.startswith('tmp-'):
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es_label = es_label[4:]
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es_label_b32 = es_label.ljust(32, '=')
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return uuid.UUID(binascii.hexlify(base64.b32decode(es_label_b32)))
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