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# Copyright 2015 Canonical Ltd. This software is licensed under the
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# GNU Affero General Public License version 3 (see the file LICENSE).
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"""Model for a partition in a partition table."""
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from __future__ import (
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from uuid import uuid4
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from django.db.models import (
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from maasserver import DefaultMeta
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from maasserver.enum import PARTITION_TABLE_TYPE
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from maasserver.models.cleansave import CleanSave
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from maasserver.models.partitiontable import PartitionTable
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from maasserver.models.timestampedmodel import TimestampedModel
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class Partition(CleanSave, TimestampedModel):
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"""A partition in a partition table.
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:ivar partition_table: `PartitionTable` this partition belongs to.
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:ivar uuid: UUID of the partition if it's part of a GPT partition.
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:ivar start_offset: Offset in bytes the partition is from the start of
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:ivar size: Size of the partition in bytes.
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:ivar bootable: Whether the partition is set as bootable.
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class Meta(DefaultMeta):
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"""Needed for South to recognize this model."""
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partition_table = ForeignKey(
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PartitionTable, null=False, blank=False, related_name="partitions")
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max_length=36, unique=True, null=True, blank=True)
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start_offset = BigIntegerField(null=False)
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size = BigIntegerField(null=False)
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bootable = BooleanField(default=False)
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"""`Node` this partition belongs to."""
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return self.partition_table.get_node()
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def get_block_size(self):
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"""Block size of partition."""
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return self.partition_table.get_block_size()
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def save(self, *args, **kwargs):
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if (self.partition_table.table_type == PARTITION_TABLE_TYPE.GPT and
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# Partition is part of a GPT partition table and doesn't have
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# a UUID set. Set the UUID so MAAS will know the UUID of the
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# partition on the created machine.
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return super(Partition, self).save(*args, **kwargs)
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src/maasserver/models/partition.py
