61
61
on the deployed operating system.
64
# All filesystem types.
66
fstype for fstype, _ in FILESYSTEM_TYPE_CHOICES)
68
# Filesystem types that expect to be mounted into the host's filesystem.
69
# Essentially this means all filesystems except swap.
70
TYPES_REQUIRING_MOUNT_POINT = frozenset(
71
fstype for fstype, _ in FILESYSTEM_TYPE_CHOICES
72
if fstype != FILESYSTEM_TYPE.SWAP)
74
# Filesystem types that require storage on a block special device, i.e. a
75
# block device or partition.
76
TYPES_REQUIRING_STORAGE = frozenset(
77
fstype for fstype, _ in FILESYSTEM_TYPE_CHOICES
78
if fstype != FILESYSTEM_TYPE.RAMFS and fstype != FILESYSTEM_TYPE.TMPFS)
64
80
class Meta(DefaultMeta):
65
81
"""Needed for South to recognize this model."""
66
82
unique_together = (
83
99
block_device = ForeignKey(
84
100
BlockDevice, unique=False, null=True, blank=True)
103
"Node", unique=False, null=True, blank=True)
86
105
# XXX: For CharField, why allow null *and* blank? Would
87
106
# CharField(null=False, blank=True, default="") not work better?
88
107
label = CharField(
167
186
Swap partitions, for example, are not mounted at a particular point in
168
187
the host's filesystem.
170
return self.fstype != FILESYSTEM_TYPE.SWAP
189
return self.fstype in self.TYPES_REQUIRING_MOUNT_POINT
192
def uses_storage(self):
193
"""True if this filesystem expects a block special device.
195
ramfs and tmpfs, for example, exist only in memory.
197
return self.fstype in self.TYPES_REQUIRING_STORAGE
172
199
def clean(self, *args, **kwargs):
173
200
super(Filesystem, self).clean(*args, **kwargs)
175
# You have to specify either a partition or a block device.
176
if self.partition is None and self.block_device is None:
177
raise ValidationError(
178
# XXX: Message leaks implementation details ("block_device").
179
"One of partition or block_device must be specified.")
181
# You can have only one of partition or block device; not both.
182
if self.partition is not None and self.block_device is not None:
183
raise ValidationError(
184
# XXX: Message leaks implementation details ("block_device").
185
"Only one of partition or block_device can be specified.")
201
parents = self.partition, self.block_device, self.node
203
# You have to specify either a partition, block device, or node.
204
if parents.count(None) == len(parents):
205
if self.uses_storage:
206
raise ValidationError(
207
"One of partition or block device must be specified.")
209
raise ValidationError(
210
"A node must be specified.")
212
# You can have only one of partition, block device, or node.
213
if len(parents) - parents.count(None) > 1:
214
raise ValidationError(
215
"Only one of partition, block device, or node can "
187
218
# If fstype is for a bcache as a cache device it needs to be in a
215
246
"Create a partition on the boot disk first and then "
216
247
"format the partition.")
249
# Only ramfs and tmpfs can have a node as a parent.
250
if self.fstype in self.TYPES_REQUIRING_STORAGE:
251
if self.node is not None:
252
raise ValidationError(
253
"A %s filesystem must be placed on a "
254
"block device or partition." % self.fstype)
256
if self.node is None:
257
raise ValidationError(
258
"RAM-backed filesystems cannot be placed on "
259
"block devices or partitions.")
218
261
def save(self, *args, **kwargs):
219
262
if not self.uuid:
220
263
self.uuid = uuid4()
added
removed
src/maasserver/models/filesystem.py
