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# Copyright 2017 Andreas Florath (andreas@florath.net)
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
import uuid
from diskimage_builder.block_device.exception \
import BlockDeviceSetupException
from diskimage_builder.block_device.plugin import NodeBase
from diskimage_builder.block_device.plugin import PluginBase
from diskimage_builder.block_device.utils import exec_sudo
logger = logging.getLogger(__name__)
# There is the need to check the length of the label of
# the filesystem. The maximum length depends on the used filesystem.
# This map provides information about the maximum label length.
file_system_max_label_length = {
"ext2": 16,
"ext3": 16,
"ext4": 16,
"xfs": 12,
"vfat": 11,
"swap": 16
}
class FilesystemNode(NodeBase):
def __init__(self, config, state):
logger.debug("Create filesystem object; config [%s]", config)
super(FilesystemNode, self).__init__(config['name'], state)
# Parameter check (mandatory)
for pname in ['base', 'type']:
if pname not in config:
raise BlockDeviceSetupException(
"Mkfs config needs [%s]" % pname)
setattr(self, pname, config[pname])
# Parameter check (optional)
for pname in ['label', 'opts', 'uuid']:
setattr(self, pname,
config[pname] if pname in config else None)
if self.label is None:
self.label = self.name
# for fat/vfat, we use the label as an identifier for the disk
# so we need that the label is converted to upper case
if self.type in ('vfat', 'fat'):
self.label = self.label.upper()
# ensure we don't already have a fs with this label ... they
# all must be unique.
if 'fs_labels' in self.state:
if self.label in self.state['fs_labels']:
raise BlockDeviceSetupException(
"File system label [%s] used more than once" % self.label)
self.state['fs_labels'].append(self.label)
else:
self.state['fs_labels'] = [self.label]
if self.type in file_system_max_label_length:
if file_system_max_label_length[self.type] < len(self.label):
raise BlockDeviceSetupException(
"Label [{label}] too long for filesystem [{type}]: "
"{len} > {max_len}".format(**{
'label': self.label,
'type': self.type,
'len': len(self.label),
'max_len': file_system_max_label_length[self.type]}))
else:
logger.warning("Length of label [%s] cannot be checked for "
"filesystem [%s]: unknown max length",
self.label, self.type)
logger.warning("Continue - but this might lead to an error")
if self.opts is not None:
self.opts = self.opts.strip().split(' ')
if self.uuid is None:
self.uuid = str(uuid.uuid4())
logger.debug("Filesystem created [%s]", self)
def get_edges(self):
edge_from = [self.base]
edge_to = []
return (edge_from, edge_to)
def create(self):
if self.type in ('swap'):
cmd = ["mkswap"]
else:
cmd = ["mkfs"]
cmd.extend(['-t', self.type])
if self.opts:
cmd.extend(self.opts)
if self.type in ('vfat', 'fat'):
cmd.extend(["-n", self.label])
else:
cmd.extend(["-L", self.label])
if self.type in ('ext2', 'ext3', 'ext4', 'swap'):
cmd.extend(['-U', self.uuid])
elif self.type == 'xfs':
cmd.extend(['-m', "uuid=%s" % self.uuid])
else:
logger.warning("UUID will not be written for fs type [%s]",
self.type)
if self.type in ('ext2', 'ext3', 'ext4', 'xfs'):
cmd.append('-q')
if 'blockdev' not in self.state:
self.state['blockdev'] = {}
device = self.state['blockdev'][self.base]['device']
cmd.append(device)
logger.debug("Creating fs command [%s]", cmd)
exec_sudo(cmd)
if 'filesys' not in self.state:
self.state['filesys'] = {}
self.state['filesys'][self.name] \
= {'uuid': self.uuid, 'label': self.label,
'fstype': self.type, 'opts': self.opts,
'device': device}
class Mkfs(PluginBase):
"""Create a file system
This block device module handles creating different file
systems.
"""
def __init__(self, config, defaults, state):
super(Mkfs, self).__init__()
self.filesystems = {}
fs = FilesystemNode(config, state)
self.filesystems[fs.get_name()] = fs
def get_nodes(self):
nodes = []
for _, fs in self.filesystems.items():
nodes.append(fs)
return nodes
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