115 lines
3.1 KiB
Python
115 lines
3.1 KiB
Python
#
|
|
# btrfs.py
|
|
# btrfs functions
|
|
#
|
|
# Copyright (C) 2011 Red Hat, Inc. All rights reserved.
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program 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 General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
# Author(s): David Lehman <dlehman@redhat.com>
|
|
#
|
|
|
|
import os
|
|
import re
|
|
|
|
from pyanaconda import iutil
|
|
from ..errors import *
|
|
|
|
import gettext
|
|
_ = lambda x: gettext.ldgettext("anaconda", x)
|
|
|
|
import logging
|
|
log = logging.getLogger("storage")
|
|
|
|
def btrfs(args, capture=False):
|
|
kwargs = {}
|
|
kwargs["stderr"] = "/dev/tty5"
|
|
if capture:
|
|
exec_func = iutil.execWithCapture
|
|
else:
|
|
exec_func = iutil.execWithRedirect
|
|
kwargs["stdout"] = "/dev/tty5"
|
|
|
|
ret = exec_func("btrfs", args, **kwargs)
|
|
if ret and not capture:
|
|
raise BTRFSError(ret)
|
|
return ret
|
|
|
|
def create_volume(devices, label=None, data=None, metadata=None):
|
|
""" For now, data and metadata must be strings mkfs.btrfs understands. """
|
|
if not devices:
|
|
raise ValueError("no devices specified")
|
|
elif any([not os.path.exists(d) for d in devices]):
|
|
raise ValueError("one or more specified devices not present")
|
|
|
|
args = []
|
|
if data:
|
|
args.append("--data=%s" % data)
|
|
|
|
if metadata:
|
|
args.append("--metadata=%s" % metadata)
|
|
|
|
if label:
|
|
args.append("--label=%s" % label)
|
|
|
|
args.extend(devices)
|
|
|
|
ret = iutil.execWithRedirect("mkfs.btrfs", args,
|
|
stdout="/dev/tty5", stderr="/dev/tty5")
|
|
if ret:
|
|
raise BTRFSError(ret)
|
|
|
|
return ret
|
|
|
|
# destroy is handled using wipefs
|
|
|
|
# add device
|
|
|
|
# remove device
|
|
|
|
def create_subvolume(mountpoint, name):
|
|
if not os.path.ismount(mountpoint):
|
|
raise ValueError("volume not mounted")
|
|
|
|
path = os.path.normpath("%s/%s" % (mountpoint, name))
|
|
args = ["subvol", "create", path]
|
|
return btrfs(args)
|
|
|
|
def delete_subvolume(mountpoint, name):
|
|
if not os.path.ismount(mountpoint):
|
|
raise ValueError("volume not mounted")
|
|
|
|
path = os.path.normpath("%s/%s" % (mountpoint, name))
|
|
args = ["subvol", "delete", path]
|
|
return btrfs(args)
|
|
|
|
def create_snapshot(source, dest):
|
|
pass
|
|
|
|
def scan_device(path):
|
|
return btrfs(["device", "scan", path])
|
|
|
|
# get a list of subvolumes from a mounted btrfs filesystem
|
|
def list_subvolumes(mountpoint):
|
|
if not os.path.ismount(mountpoint):
|
|
raise ValueError("volume not mounted")
|
|
|
|
args = ["subvol", "list", mountpoint]
|
|
buf = btrfs(args, capture=True)
|
|
vols = []
|
|
for group in re.findall(r'ID (\d+) gen \d+ top level \d+ path (.+)\n', buf):
|
|
vols.append({"id": int(group[0]), "path": group[1]})
|
|
|
|
return vols
|