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charliebrady |
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# swap.py |
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# Device format classes for anaconda's storage configuration module. |
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# Copyright (C) 2009 Red Hat, Inc. |
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# |
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# This copyrighted material is made available to anyone wishing to use, |
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# modify, copy, or redistribute it subject to the terms and conditions of |
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# the GNU General Public License v.2, or (at your option) any later version. |
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# This program is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY expressed or implied, including the implied warranties of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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# Public License for more details. You should have received a copy of the |
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# GNU General Public License along with this program; if not, write to the |
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# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the |
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# source code or documentation are not subject to the GNU General Public |
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# License and may only be used or replicated with the express permission of |
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# Red Hat, Inc. |
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# |
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# Red Hat Author(s): Dave Lehman <dlehman@redhat.com> |
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# |
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from iutil import numeric_type |
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from parted import PARTITION_SWAP, fileSystemType |
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from ..storage_log import log_method_call |
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from ..errors import * |
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from ..devicelibs import swap |
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from . import DeviceFormat, register_device_format |
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from constants import * |
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import gettext |
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_ = lambda x: gettext.ldgettext("anaconda", x) |
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import logging |
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log = logging.getLogger("storage") |
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class SwapSpace(DeviceFormat): |
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""" Swap space """ |
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_type = "swap" |
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_name = None |
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_udevTypes = ["swap"] |
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partedFlag = PARTITION_SWAP |
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partedSystem = fileSystemType["linux-swap(v1)"] |
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_formattable = True # can be formatted |
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_supported = True # is supported |
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_linuxNative = True # for clearpart |
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_maxSize = SWAP_SIZE_LIMIT |
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def __init__(self, *args, **kwargs): |
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""" Create a SwapSpace instance. |
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Keyword Arguments: |
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device -- path to the underlying device |
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uuid -- this swap space's uuid |
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label -- this swap space's label |
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priority -- this swap space's priority |
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exists -- indicates whether this is an existing format |
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""" |
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log_method_call(self, *args, **kwargs) |
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DeviceFormat.__init__(self, *args, **kwargs) |
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self.priority = kwargs.get("priority") |
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self.label = kwargs.get("label") |
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def __str__(self): |
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s = DeviceFormat.__str__(self) |
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s += (" priority = %(priority)s label = %(label)s" % |
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{"priority": self.priority, "label": self.label}) |
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return s |
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@property |
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def dict(self): |
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d = super(SwapSpace, self).dict |
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d.update({"priority": self.priority, "label": self.label}) |
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return d |
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def _setPriority(self, priority): |
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if priority is None: |
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self._priority = None |
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return |
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if not isinstance(priority, int) or not 0 <= priority <= 32767: |
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raise ValueError("swap priority must be an integer between 0 and 32767") |
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self._priority = priority |
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def _getPriority(self): |
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return self._priority |
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priority = property(_getPriority, _setPriority, |
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doc="The priority of the swap device") |
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def _getOptions(self): |
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opts = "" |
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if self.priority is not None: |
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opts += "pri=%d" % self.priority |
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return opts |
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def _setOptions(self, opts): |
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if not opts: |
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self.priority = None |
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return |
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for option in opts.split(","): |
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(opt, equals, arg) = option.partition("=") |
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if equals and opt == "pri": |
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try: |
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self.priority = int(arg) |
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except ValueError: |
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log.info("invalid value for swap priority: %s" % arg) |
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options = property(_getOptions, _setOptions, |
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doc="The swap device's fstab options string") |
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@property |
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def status(self): |
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""" Device status. """ |
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return self.exists and swap.swapstatus(self.device) |
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def setup(self, *args, **kwargs): |
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""" Open, or set up, a device. """ |
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log_method_call(self, device=self.device, |
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type=self.type, status=self.status) |
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if not self.exists: |
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raise SwapSpaceError("format has not been created") |
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if self.status: |
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return |
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DeviceFormat.setup(self, *args, **kwargs) |
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swap.swapon(self.device, priority=self.priority) |
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def teardown(self, *args, **kwargs): |
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""" Close, or tear down, a device. """ |
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log_method_call(self, device=self.device, |
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type=self.type, status=self.status) |
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if not self.exists: |
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raise SwapSpaceError("format has not been created") |
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if self.status: |
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swap.swapoff(self.device) |
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def create(self, *args, **kwargs): |
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""" Create the device. """ |
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log_method_call(self, device=self.device, |
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type=self.type, status=self.status) |
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intf = kwargs.get("intf") |
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force = kwargs.get("force") |
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if not force and self.exists: |
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raise SwapSpaceError("format already exists") |
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if force: |
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self.teardown() |
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elif self.status: |
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raise SwapSpaceError("device exists and is active") |
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w = None |
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if intf: |
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w = intf.progressWindow(_("Formatting"), |
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_("Creating %s on %s") |
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% (self.type, |
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kwargs.get("device", self.device)), |
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100, pulse = True) |
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try: |
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DeviceFormat.create(self, *args, **kwargs) |
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swap.mkswap(self.device, label=self.label, progress=w) |
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except Exception: |
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raise |
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else: |
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self.exists = True |
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finally: |
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if w: |
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w.pop() |
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def writeKS(self, f): |
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f.write("swap") |
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if self.label: |
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f.write(" --label=\"%s\"" % self.label) |
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register_device_format(SwapSpace) |
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