diff options
author | Stuart Mackie <wsmackie@juniper.net> | 2017-03-23 06:19:54 -0700 |
---|---|---|
committer | Stuart Mackie <wsmackie@juniper.net> | 2017-03-23 06:19:54 -0700 |
commit | 88df88a19674ccc0017836941b8ee32eaadf19fb (patch) | |
tree | f930c90f75846ec8d8e33cf27325ff8fafc85d5c /charms/trusty/contrail-control/hooks/charmhelpers/contrib/storage/linux/loopback.py | |
parent | 9f50a40437477432a21b326b15c343ca6b8fe516 (diff) |
Deleted charms with wrong license. Will source them differently in future.
Change-Id: I0fc99ea03c6b6ca4701e63793cb2be60e56c7588
Signed-off-by: Stuart Mackie <wsmackie@juniper.net>
Diffstat (limited to 'charms/trusty/contrail-control/hooks/charmhelpers/contrib/storage/linux/loopback.py')
-rw-r--r-- | charms/trusty/contrail-control/hooks/charmhelpers/contrib/storage/linux/loopback.py | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/charms/trusty/contrail-control/hooks/charmhelpers/contrib/storage/linux/loopback.py b/charms/trusty/contrail-control/hooks/charmhelpers/contrib/storage/linux/loopback.py deleted file mode 100644 index c296f09..0000000 --- a/charms/trusty/contrail-control/hooks/charmhelpers/contrib/storage/linux/loopback.py +++ /dev/null @@ -1,78 +0,0 @@ -# Copyright 2014-2015 Canonical Limited. -# -# This file is part of charm-helpers. -# -# charm-helpers is free software: you can redistribute it and/or modify -# it under the terms of the GNU Lesser General Public License version 3 as -# published by the Free Software Foundation. -# -# charm-helpers is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU Lesser General Public License for more details. -# -# You should have received a copy of the GNU Lesser General Public License -# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>. - -import os -import re -from subprocess import ( - check_call, - check_output, -) - -import six - - -################################################## -# loopback device helpers. -################################################## -def loopback_devices(): - ''' - Parse through 'losetup -a' output to determine currently mapped - loopback devices. Output is expected to look like: - - /dev/loop0: [0807]:961814 (/tmp/my.img) - - :returns: dict: a dict mapping {loopback_dev: backing_file} - ''' - loopbacks = {} - cmd = ['losetup', '-a'] - devs = [d.strip().split(' ') for d in - check_output(cmd).splitlines() if d != ''] - for dev, _, f in devs: - loopbacks[dev.replace(':', '')] = re.search('\((\S+)\)', f).groups()[0] - return loopbacks - - -def create_loopback(file_path): - ''' - Create a loopback device for a given backing file. - - :returns: str: Full path to new loopback device (eg, /dev/loop0) - ''' - file_path = os.path.abspath(file_path) - check_call(['losetup', '--find', file_path]) - for d, f in six.iteritems(loopback_devices()): - if f == file_path: - return d - - -def ensure_loopback_device(path, size): - ''' - Ensure a loopback device exists for a given backing file path and size. - If it a loopback device is not mapped to file, a new one will be created. - - TODO: Confirm size of found loopback device. - - :returns: str: Full path to the ensured loopback device (eg, /dev/loop0) - ''' - for d, f in six.iteritems(loopback_devices()): - if f == path: - return d - - if not os.path.exists(path): - cmd = ['truncate', '--size', size, path] - check_call(cmd) - - return create_loopback(path) |