115 lines
4.8 KiB
Python
115 lines
4.8 KiB
Python
# User interface library functions for filesystem/disk space checking
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#
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# Copyright (C) 2012 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): David Lehman <dlehman@redhat.com>
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#
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import os
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from blivet.size import Size
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from pyanaconda import iutil
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from pyanaconda.i18n import _, N_
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import logging
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log = logging.getLogger("anaconda")
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class FileSystemSpaceChecker(object):
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"""This object provides for a way to verify that enough space is available
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on configured filesystems to support the current software selections.
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It is run as part of completeness checking every time a spoke changes,
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therefore moving this step up out of both the storage and software
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spokes.
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"""
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error_template = N_("Not enough space in filesystems for the current "
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"software selection. An additional %s is needed.")
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def __init__(self, storage, payload):
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"""Create a new FileSystemSpaceChecker object.
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Attributes:
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payload -- An instance of a packaging.Payload subclass.
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storage -- An instance of storage.Storage.
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"""
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self.payload = payload
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self.storage = storage
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self.reset()
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def reset(self):
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"""Get rid of any existing error messages and prepare to run the
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check again.
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"""
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self.success = False
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self.deficit = Size(0)
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self.error_message = ""
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def check(self):
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"""Check configured storage against software selections. When this
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method is complete (which should be pretty quickly), the following
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attributes are available for inspection:
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success -- A simple boolean defining whether there's enough
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space or not.
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deficit -- If unsuccessful, how much space the system is
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short for current software selections.
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error_message -- If unsuccessful, an error message describing the
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situation. This message is suitable for putting
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in the info bar at the bottom of a Hub.
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"""
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self.reset()
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free = Size(self.storage.fileSystemFreeSpace)
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needed = self.payload.spaceRequired
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log.info("fs space: %s needed: %s", free, needed)
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self.success = (free >= needed)
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if not self.success:
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self.deficit = needed - free
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self.error_message = _(self.error_template) % self.deficit
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return self.success
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class DirInstallSpaceChecker(FileSystemSpaceChecker):
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"""Use the amount of space available at ROOT_PATH to calculate free space.
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This is used for the --dirinstall option where no storage is mounted and it
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is using space from the host's filesystem.
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"""
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def check(self):
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"""Check configured storage against software selections. When this
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method is complete (which should be pretty quickly), the following
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attributes are available for inspection:
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success -- A simple boolean defining whether there's enough
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space or not.
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deficit -- If unsuccessful, how much space the system is
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short for current software selections.
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error_message -- If unsuccessful, an error message describing the
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situation. This message is suitable for putting
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in the info bar at the bottom of a Hub.
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"""
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self.reset()
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stat = iutil.eintr_retry_call(os.statvfs, iutil.getSysroot())
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free = Size(stat.f_bsize * stat.f_bfree)
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needed = self.payload.spaceRequired
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log.info("fs space: %s needed: %s", free, needed)
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self.success = (free >= needed)
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if not self.success:
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self.deficit = needed - free
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self.error_message = _(self.error_template) % self.deficit
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return self.success
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