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fs.py
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fs.py
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# filesystems.py
# Filesystem classes for anaconda's storage configuration module.
#
# Copyright (C) 2009 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
# Red Hat Author(s): Dave Lehman <dlehman@redhat.com>
# David Cantrell <dcantrell@redhat.com>
#
""" Filesystem classes. """
from decimal import Decimal
import os
import tempfile
from . import fslabeling
from ..errors import FormatCreateError, FSError, FSResizeError
from . import DeviceFormat, register_device_format
from .. import util
from .. import platform
from ..flags import flags
from parted import fileSystemType
from ..storage_log import log_exception_info, log_method_call
from .. import arch
from ..size import Size, ROUND_UP, ROUND_DOWN, unitStr
from ..size import B, KiB, MiB, GiB, KB, MB, GB
from ..i18n import _, N_
from .. import udev
import logging
log = logging.getLogger("blivet")
fs_configs = {}
kernel_filesystems = []
nodev_filesystems = []
def update_kernel_filesystems():
for line in open("/proc/filesystems").readlines():
fields = line.split()
kernel_filesystems.append(fields[-1])
if fields[0] == "nodev":
nodev_filesystems.append(fields[-1])
update_kernel_filesystems()
class FS(DeviceFormat):
""" Filesystem base class. """
_type = "Abstract Filesystem Class" # fs type name
_mountType = None # like _type but for passing to mount
_name = None
_mkfs = "" # mkfs utility
_modules = [] # kernel modules required for support
_resizefs = "" # resize utility
_labelfs = None # labeling functionality
_fsck = "" # fs check utility
_fsckErrors = {} # fs check command error codes & msgs
_infofs = "" # fs info utility
_defaultFormatOptions = [] # default options passed to mkfs
_defaultMountOptions = ["defaults"] # default options passed to mount
_defaultCheckOptions = []
_defaultInfoOptions = []
_existingSizeFields = []
_resizefsUnit = None
_fsProfileSpecifier = None # mkfs option specifying fsprofile
def __init__(self, **kwargs):
"""
:keyword device: path to the block device node (required for
existing filesystems)
:keyword mountpoint: the filesystem's planned mountpoint
:keyword label: the filesystem label
:keyword uuid: the filesystem UUID
:keyword mountopts: mount options for the filesystem
:type mountopts: str
:keyword size: the filesystem's size in MiB
:keyword exists: indicates whether this is an existing filesystem
:type exists: bool
.. note::
The 'device' kwarg is required for existing formats. For non-
existent formats, it is only necessary that the :attr:`device`
attribute be set before the :meth:`create` method runs. Note
that you can specify the device at the last moment by specifying
it via the 'device' kwarg to the :meth:`create` method.
"""
if self.__class__ is FS:
raise TypeError("FS is an abstract class.")
DeviceFormat.__init__(self, **kwargs)
self.mountpoint = kwargs.get("mountpoint")
self.mountopts = kwargs.get("mountopts")
self.label = kwargs.get("label")
self.fsprofile = kwargs.get("fsprofile")
# filesystem size does not necessarily equal device size
self._size = kwargs.get("size", Size(0))
self._minInstanceSize = Size(0) # min size of this FS instance
# Resize operations are limited to error-free filesystems whose current
# size is known.
self._resizable = False
if flags.installer_mode and self.resizefsProg:
# if you want current/min size you have to call updateSizeInfo
try:
self.updateSizeInfo()
except FSError:
log.warning("%s filesystem on %s needs repair", self.type,
self.device)
self._targetSize = self._size
if self.supported:
self.loadModule()
def __repr__(self):
s = DeviceFormat.__repr__(self)
s += (" mountpoint = %(mountpoint)s mountopts = %(mountopts)s\n"
" label = %(label)s size = %(size)s"
" targetSize = %(targetSize)s\n" %
{"mountpoint": self.mountpoint, "mountopts": self.mountopts,
"label": self.label, "size": self._size,
"targetSize": self.targetSize})
return s
@property
def desc(self):
s = "%s filesystem" % self.type
if self.mountpoint:
s += " mounted at %s" % self.mountpoint
return s
@property
def dict(self):
d = super(FS, self).dict
d.update({"mountpoint": self.mountpoint, "size": self._size,
"label": self.label, "targetSize": self.targetSize,
"mountable": self.mountable})
return d
@classmethod
def labeling(cls):
"""Returns True if this filesystem uses labels, otherwise False.
:rtype: bool
"""
return cls._labelfs is not None
@classmethod
def relabels(cls):
"""Returns True if it is possible to relabel this filesystem
after creation, otherwise False.
:rtype: bool
"""
return cls._labelfs is not None and cls._labelfs.label_app is not None
@classmethod
def labelFormatOK(cls, label):
"""Return True if the label has an acceptable format for this
filesystem. None, which represents accepting the default for this
device, is always acceptable.
:param label: A possible label
:type label: str or None
"""
return label is None or (cls._labelfs is not None and cls._labelfs.labelFormatOK(label))
label = property(lambda s: s._getLabel(), lambda s,l: s._setLabel(l),
doc="this filesystem's label")
def _setTargetSize(self, newsize):
""" Set a target size for this filesystem. """
if not isinstance(newsize, Size):
raise ValueError("new size must be of type Size")
if not self.exists:
raise FSError("filesystem has not been created")
if not self.resizable:
raise FSError("filesystem is not resizable")
if newsize is None:
# unset any outstanding resize request
self._targetSize = self._size
return
if not self.minSize <= newsize < self.maxSize:
raise ValueError("requested size %s must fall between minimum size %s and maximum size %s" % (newsize, self.minSize, self.maxSize))
self._targetSize = newsize
def _getTargetSize(self):
""" Get this filesystem's target size. """
return self._targetSize
targetSize = property(_getTargetSize, _setTargetSize,
doc="Target size for this filesystem")
def _getSize(self):
""" Get this filesystem's size. """
return self.targetSize if self.resizable else self._size
size = property(_getSize, doc="This filesystem's size, accounting "
"for pending changes")
def updateSizeInfo(self):
""" Update this filesystem's current and minimum size (for resize). """
if not self.exists:
return
self._size = Size(0)
self._minSize = self.__class__._minSize
self._minInstanceSize = Size(0)
self._resizable = self.__class__._resizable
# We can't allow resize if the filesystem has errors.
try:
self.doCheck()
except FSError:
errors = True
raise
else:
errors = False
finally:
# try to gather current size info anyway
info = self._getFSInfo()
self._size = self._getExistingSize(info=info)
self._minSize = self._size # default to current size
# We absolutely need a current size to enable resize. To shrink the
# filesystem we need a real minimum size provided by the resize
# tool. Failing that, we can default to the current size,
# effectively disabling shrink.
if errors or self._size == Size(0):
self._resizable = False
self._getMinSize(info=info) # force calculation of minimum size
def _getMinSize(self, info=None):
pass
def _getFSInfo(self):
buf = ""
if self.infofsProg and self.exists and \
util.find_program_in_path(self.infofsProg):
argv = self._defaultInfoOptions + [ self.device ]
try:
buf = util.capture_output([self.infofsProg] + argv)
except OSError as e:
log.error("failed to gather fs info: %s", e)
return buf
def _getExistingSize(self, info=None):
""" Determine the size of this filesystem.
Filesystem must exist. Each filesystem varies, but the general
procedure is to run the filesystem dump or info utility and read
the block size and number of blocks for the filesystem
and compute megabytes from that.
The loop that reads the output from the infofsProg is meant
to be simple, but take in to account variations in output.
The general procedure:
1) Capture output from infofsProg.
2) Iterate over each line of the output:
a) Trim leading and trailing whitespace.
b) Break line into fields split on ' '
c) If line begins with any of the strings in
_existingSizeFields, start at the end of
fields and take the first one that converts
to an int. Store this in the values list.
d) Repeat until the values list length equals
the _existingSizeFields length.
3) If the length of the values list equals the length
of _existingSizeFields, compute the size of this
filesystem by multiplying all of the values together
to get bytes, then convert to megabytes. Return
this value.
4) If we were unable to capture all fields, return 0.
The caller should catch exceptions from this method. Any
exception raised indicates a need to change the fields we
are looking for, the command to run and arguments, or
something else. If you catch an exception from this method,
assume the filesystem cannot be resized.
:keyword info: filesystem info buffer
:type info: str (output of :attr:`infofsProg`)
:returns: size of existing fs in MiB.
:rtype: float.
"""
size = self._size
if self.exists and not size:
if not self._existingSizeFields:
return Size(0)
if info is None:
info = self._getFSInfo()
try:
values = []
for line in info.splitlines():
found = False
line = line.strip()
tmp = line.split()
tmp.reverse()
for field in self._existingSizeFields:
if line.startswith(field):
for subfield in tmp:
try:
values.append(int(subfield))
found = True
break
except ValueError:
continue
if found:
break
if len(values) == len(self._existingSizeFields):
break
if len(values) != len(self._existingSizeFields):
return Size(0)
size = 1
for value in values:
size *= value
size = Size(size)
except Exception: # pylint: disable=broad-except
log_exception_info(log.error, "failed to obtain size of filesystem on %s", [self.device])
return size
@property
def currentSize(self):
""" The filesystem's current actual size. """
return self._size if self.exists else Size(0)
@property
def free(self):
""" The amount of space that can be gained by resizing this
filesystem to its minimum size.
"""
return max(Size(0), self.currentSize - self.minSize)
def _getFormatOptions(self, options=None, do_labeling=False):
"""Get a list of format options to be used when creating the
filesystem.
:param options: any special options
:type options: list of str or None
:param bool do_labeling: True if labeling during filesystem creation,
otherwise False
"""
argv = []
if options and isinstance(options, list):
argv.extend(options)
argv.extend(self.defaultFormatOptions)
if self._fsProfileSpecifier and self.fsprofile:
argv.extend([self._fsProfileSpecifier, self.fsprofile])
if do_labeling and self.label is not None:
if self.labelFormatOK(self.label):
argv.extend(self._labelfs.labelingArgs(self.label))
else:
log.warning("Choosing not to apply label (%s) during creation of filesystem %s. Label format is unacceptable for this filesystem.", self.label, self.type)
argv.append(self.device)
return argv
def doFormat(self, options=None):
""" Create the filesystem.
:param options: options to pass to mkfs
:type options: list of strings
:raises: FormatCreateError, FSError
"""
log_method_call(self, type=self.mountType, device=self.device,
mountpoint=self.mountpoint)
if self.exists:
raise FormatCreateError("filesystem already exists", self.device)
if not self.formattable:
return
if not self.mkfsProg:
return
if not os.path.exists(self.device):
raise FormatCreateError("device does not exist", self.device)
argv = self._getFormatOptions(options=options,
do_labeling=not self.relabels())
try:
ret = util.run_program([self.mkfsProg] + argv)
except OSError as e:
raise FormatCreateError(e, self.device)
if ret:
raise FormatCreateError("format failed: %s" % ret, self.device)
self.exists = True
self.notifyKernel()
if self.label is not None and self.relabels():
try:
self.writeLabel()
except FSError as e:
log.warning("Failed to write label (%s) for filesystem %s: %s", self.label, self.type, e)
@property
def resizeArgs(self):
""" Returns the arguments for resizing the filesystem.
Must be overridden by every class that has non-None _resizefs.
:returns: arguments for resizing a filesystem.
:rtype: list of str
"""
return []
def doResize(self):
""" Resize this filesystem based on this instance's targetSize attr.
:raises: FSResizeError, FSError
"""
if not self.exists:
raise FSResizeError("filesystem does not exist", self.device)
if not self.resizable:
raise FSResizeError("filesystem not resizable", self.device)
if self.targetSize == self.currentSize:
return
if not self.resizefsProg:
return
# tmpfs mounts don't need an existing device node
if not self.device == "tmpfs" and not os.path.exists(self.device):
raise FSResizeError("device does not exist", self.device)
# The first minimum size can be incorrect if the fs was not
# properly unmounted. After doCheck the minimum size will be correct
# so run the check one last time and bump up the size if it was too
# small.
self.updateSizeInfo()
# Check again if resizable is True, as updateSizeInfo() can change that
if not self.resizable:
raise FSResizeError("filesystem not resizable", self.device)
if self.targetSize < self.minSize:
self.targetSize = self.minSize
log.info("Minimum size changed, setting targetSize on %s to %s",
self.device, self.targetSize)
# Bump target size to nearest whole number of the resize tool's units.
# We always round down because the fs has to fit on whatever device
# contains it. To round up would risk quietly setting a target size too
# large for the device to hold.
rounded = self.targetSize.roundToNearest(self._resizefsUnit,
rounding=ROUND_DOWN)
# 1. target size was between the min size and max size values prior to
# rounding (see _setTargetSize)
# 2. we've just rounded the target size down (or not at all)
# 3. the minimum size is already either rounded (see _getMinSize) or is
# equal to the current size (see updateSizeInfo)
# 5. the minimum size is less than or equal to the current size (see
# _getMinSize)
#
# This, I think, is sufficient to guarantee that the rounded target size
# is greater than or equal to the minimum size.
# It is possible that rounding down a target size greater than the
# current size would move it below the current size, thus changing the
# direction of the resize. That means the target size was less than one
# unit larger than the current size, and we should do nothing and return
# early.
if self.targetSize > self.currentSize and rounded < self.currentSize:
log.info("rounding target size down to next %s obviated resize of "
"filesystem on %s", unitStr(self._resizefsUnit), self.device)
return
else:
self.targetSize = rounded
try:
ret = util.run_program([self.resizefsProg] + self.resizeArgs)
except OSError as e:
raise FSResizeError(e, self.device)
if ret:
raise FSResizeError("resize failed: %s" % ret, self.device)
self.doCheck()
# XXX must be a smarter way to do this
self._size = self.targetSize
self.notifyKernel()
def _getCheckArgs(self):
argv = []
argv.extend(self.defaultCheckOptions)
argv.append(self.device)
return argv
def _fsckFailed(self, rc):
# pylint: disable=unused-argument
return False
def _fsckErrorMessage(self, rc):
return _("Unknown return code: %d.") % (rc,)
def doCheck(self):
""" Run a filesystem check.
:raises: FSError
"""
if not self.exists:
raise FSError("filesystem has not been created")
if not self.fsckProg:
return
if not os.path.exists(self.device):
raise FSError("device does not exist")
try:
ret = util.run_program([self.fsckProg] + self._getCheckArgs())
except OSError as e:
raise FSError("filesystem check failed: %s" % e)
if self._fsckFailed(ret):
hdr = _("%(type)s filesystem check failure on %(device)s: ") % \
{"type": self.type, "device": self.device}
msg = self._fsckErrorMessage(ret)
raise FSError(hdr + msg)
def loadModule(self):
"""Load whatever kernel module is required to support this filesystem."""
if not self._modules or self.mountType in kernel_filesystems:
return
for module in self._modules:
try:
rc = util.run_program(["modprobe", module])
except OSError as e:
log.error("Could not load kernel module %s: %s", module, e)
self._supported = False
return
if rc:
log.error("Could not load kernel module %s", module)
self._supported = False
return
# If we successfully loaded a kernel module for this filesystem, we
# also need to update the list of supported filesystems.
update_kernel_filesystems()
@property
def systemMountpoint(self):
if not self.mountsCache:
return None
return self.mountsCache.getMountpoint(self.device)
def testMount(self):
""" Try to mount the fs and return True if successful. """
ret = False
if self.status:
return True
# create a temp dir
prefix = "%s.%s" % (os.path.basename(self.device), self.type)
mountpoint = tempfile.mkdtemp(prefix=prefix)
# try the mount
try:
self.mount(mountpoint=mountpoint)
except Exception: # pylint: disable=broad-except
log_exception_info(log.info, "test mount failed")
else:
self.unmount()
ret = True
finally:
os.rmdir(mountpoint)
return ret
def mount(self, options="", chroot="/", mountpoint=None):
""" Mount this filesystem.
:keyword options: mount options (overrides all other option strings)
:type options: str.
:keyword chroot: prefix to apply to mountpoint
:keyword mountpoint: mountpoint (overrides self.mountpoint)
:raises: FSError
"""
if not self.exists:
raise FSError("filesystem has not been created")
if not mountpoint:
mountpoint = self.mountpoint
if not mountpoint:
raise FSError("no mountpoint given")
if self.status:
return
if not isinstance(self, NoDevFS) and not os.path.exists(self.device):
raise FSError("device %s does not exist" % self.device)
# XXX os.path.join is FUBAR:
#
# os.path.join("/mnt/foo", "/") -> "/"
#
#mountpoint = os.path.join(chroot, mountpoint)
chrootedMountpoint = os.path.normpath("%s/%s" % (chroot, mountpoint))
util.makedirs(chrootedMountpoint)
# passed in options override default options
if not options or not isinstance(options, str):
options = self.options
if isinstance(self, BindFS):
options = "bind," + options
try:
rc = util.mount(self.device, chrootedMountpoint,
fstype=self.mountType,
options=options)
except Exception as e:
raise FSError("mount failed: %s" % e)
if rc:
raise FSError("mount failed: %s" % rc)
if flags.selinux and "ro" not in options.split(",") and flags.installer_mode:
ret = util.reset_file_context(mountpoint, chroot)
if not ret:
log.warning("Failed to reset SElinux context for newly mounted filesystem root directory to default.")
lost_and_found_context = util.match_path_context("/lost+found")
lost_and_found_path = os.path.join(mountpoint, "lost+found")
ret = util.set_file_context(lost_and_found_path, lost_and_found_context, chroot)
if not ret:
log.warning("Failed to set SELinux context for newly mounted filesystem lost+found directory at %s to %s", lost_and_found_path, lost_and_found_context)
def unmount(self):
""" Unmount this filesystem. """
if not self.exists:
raise FSError("filesystem has not been created")
if not self.systemMountpoint:
# not mounted
return
if not os.path.exists(self.systemMountpoint):
raise FSError("mountpoint does not exist")
udev.settle()
rc = util.umount(self.systemMountpoint)
if rc:
# try and catch whatever is causing the umount problem
util.run_program(["lsof", self.systemMountpoint])
raise FSError("umount failed")
def readLabel(self):
"""Read this filesystem's label.
:return: the filesystem's label
:rtype: str
Raises a FSError if the label can not be read.
"""
if not self.exists:
raise FSError("filesystem has not been created")
if not os.path.exists(self.device):
raise FSError("device does not exist")
if not self.relabels() or not self._labelfs.label_app.reads:
raise FSError("no application to read label for filesystem %s" % self.type)
(rc, out) = util.run_program_and_capture_output(self._labelfs.label_app.readLabelCommand(self))
if rc:
raise FSError("read label failed")
label = out.strip()
if label == "":
return ""
else:
return self._labelfs.label_app.extractLabel(label)
def writeLabel(self):
""" Create a label for this filesystem.
:raises: FSError
If self.label is None, this means accept the default, so raise
an FSError in this case.
Raises a FSError if the label can not be set.
"""
if self.label is None:
raise FSError("makes no sense to write a label when accepting default label")
if not self.exists:
raise FSError("filesystem has not been created")
if not self.relabels():
raise FSError("no application to set label for filesystem %s" % self.type)
if not self.labelFormatOK(self.label):
raise FSError("bad label format for labelling application %s" % self._labelfs.label_app.name)
if not os.path.exists(self.device):
raise FSError("device does not exist")
rc = util.run_program(self._labelfs.label_app.setLabelCommand(self))
if rc:
raise FSError("label failed")
self.notifyKernel()
@property
def mkfsProg(self):
""" Program used to create filesystems of this type. """
return self._mkfs
@property
def fsckProg(self):
""" Program used to check filesystems of this type. """
return self._fsck
@property
def resizefsProg(self):
""" Program used to resize filesystems of this type. """
return self._resizefs
@property
def labelfsProg(self):
""" Program used to manage labels for this filesystem type.
May be None if no such program exists.
"""
if self._labelfs and self._labelfs.label_app:
return self._labelfs.label_app.name
else:
return None
@property
def infofsProg(self):
""" Program used to get information for this filesystem type. """
return self._infofs
@property
def utilsAvailable(self):
# we aren't checking for fsck because we shouldn't need it
for prog in [self.mkfsProg, self.resizefsProg, self.labelfsProg,
self.infofsProg]:
if not prog:
continue
if not util.find_program_in_path(prog):
return False
return True
@property
def supported(self):
log_method_call(self, supported=self._supported)
return self._supported and self.utilsAvailable
@property
def mountable(self):
canmount = (self.mountType in kernel_filesystems) or \
(os.access("/sbin/mount.%s" % (self.mountType,), os.X_OK))
# Still consider the filesystem type mountable if there exists
# an appropriate filesystem driver in the kernel modules directory.
if not canmount:
modpath = os.path.realpath(os.path.join("/lib/modules", os.uname()[2]))
if os.path.isdir(modpath):
modname = "%s.ko" % self.mountType
for _root, _dirs, files in os.walk(modpath):
if any(x.startswith(modname) for x in files):
return True
return canmount
@property
def resizable(self):
""" Can formats of this filesystem type be resized? """
return super(FS, self).resizable and self.utilsAvailable
@property
def defaultFormatOptions(self):
""" Default options passed to mkfs for this filesystem type. """
# return a copy to prevent modification
return self._defaultFormatOptions[:]
@property
def defaultMountOptions(self):
""" Default options passed to mount for this filesystem type. """
# return a copy to prevent modification
return self._defaultMountOptions[:]
@property
def defaultCheckOptions(self):
""" Default options passed to checker for this filesystem type. """
# return a copy to prevent modification
return self._defaultCheckOptions[:]
def _getOptions(self):
return self.mountopts or ",".join(self.defaultMountOptions)
def _setOptions(self, options):
self.mountopts = options
@property
def mountType(self):
if not self._mountType:
self._mountType = self._type
return self._mountType
# These methods just wrap filesystem-specific methods in more
# generically named methods so filesystems and formatted devices
# like swap and LVM physical volumes can have a common API.
def create(self, **kwargs):
""" Create the filesystem on the specified block device.
:keyword device: path to device node
:type device: str.
:raises: FormatCreateError, FSError
:returns: None.
.. :note::
If a device node path is passed to this method it will overwrite
any previously set value of this instance's "device" attribute.
"""
if self.exists:
raise FSError("filesystem already exists")
DeviceFormat.create(self, **kwargs)
return self.doFormat(options=kwargs.get('options'))
def setup(self, **kwargs):
""" Mount the filesystem.
The filesystem will be mounted at the directory indicated by
self.mountpoint unless overridden via the 'mountpoint' kwarg.
:keyword device: device node path
:type device: str.
:keyword mountpoint: mountpoint (overrides self.mountpoint)
:type mountpoint: str.
:raises: FormatSetupError.
:returns: None.
.. :note::
If a device node path is passed to this method it will overwrite
any previously set value of this instance's "device" attribute.
"""
return self.mount(**kwargs)
def teardown(self):
return self.unmount()
@property
def status(self):
# FIXME check /proc/mounts or similar
if not self.exists:
return False
return self.systemMountpoint is not None
def sync(self, root="/"):
pass
def populateKSData(self, data):
super(FS, self).populateKSData(data)
data.mountpoint = self.mountpoint or "none"
data.label = self.label or ""
if self.options != "defaults":
data.fsopts = self.options
else:
data.fsopts = ""
data.fsprofile = self.fsprofile or ""
class Ext2FS(FS):
""" ext2 filesystem. """
_type = "ext2"
_mkfs = "mke2fs"
_modules = ["ext2"]
_resizefs = "resize2fs"
_labelfs = fslabeling.Ext2FSLabeling()
_fsck = "e2fsck"
_fsckErrors = {4: N_("File system errors left uncorrected."),
8: N_("Operational error."),
16: N_("Usage or syntax error."),
32: N_("e2fsck cancelled by user request."),
128: N_("Shared library error.")}
_packages = ["e2fsprogs"]
_formattable = True
_supported = True
_resizable = True
_linuxNative = True
_maxSize = Size("8 TiB")
_defaultCheckOptions = ["-f", "-p", "-C", "0"]
_dump = True
_check = True
_infofs = "dumpe2fs"
_defaultInfoOptions = ["-h"]
_existingSizeFields = ["Block count:", "Block size:"]
_resizefsUnit = MiB
_fsProfileSpecifier = "-T"
partedSystem = fileSystemType["ext2"]
def _fsckFailed(self, rc):
for errorCode in self._fsckErrors.keys():
if rc & errorCode:
return True
return False
def _fsckErrorMessage(self, rc):
msg = ''
for errorCode in self._fsckErrors.keys():
if rc & errorCode:
msg += "\n" + _(self._fsckErrors[errorCode])
return msg.strip()
def _getMinSize(self, info=None):
""" Set the minimum size for this filesystem in MiB.
:keyword info: filesystem info buffer
:type info: str (output of :attr:`infofsProg`)
:rtype: None.
"""
size = self._minSize
blockSize = None
if self.exists and os.path.exists(self.device):
if info is None:
# get block size
info = self._getFSInfo()
for line in info.splitlines():
if line.startswith("Block size:"):
blockSize = int(line.split(" ")[-1])
if blockSize is None:
raise FSError("failed to get block size for %s filesystem "
"on %s" % (self.mountType, self.device))
# get minimum size according to resize2fs
buf = util.capture_output([self.resizefsProg,
"-P", self.device])
_size = None
for line in buf.splitlines():
# line will look like:
# Estimated minimum size of the filesystem: 1148649
(text, _sep, minSize) = line.partition(":")
if "minimum size of the filesystem" not in text:
continue
minSize = minSize.strip()
if not minSize:
break