Synnefo » snf-ganeti » ganeti-local

#

#

# Copyright (C) 2013 Google Inc.

#

# 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, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

"""File storage functions.

"""

import os

from ganeti import constants

from ganeti import errors

def GetFileStorageSpaceInfo(path):

  """Retrieves the free and total space of the device where the file is

     located.

     @type path: string

     @param path: Path of the file whose embracing device's capacity is

       reported.

     @return: a dictionary containing 'vg_size' and 'vg_free' given in MebiBytes

  """

  try:

    result = os.statvfs(path)

    free = (result.f_frsize * result.f_bavail) / (1024 * 1024)

    size = (result.f_frsize * result.f_blocks) / (1024 * 1024)

    return {"type": constants.ST_FILE,

            "name": path,

            "vg_size": size,

            "vg_free": free}

  except OSError, e:

    raise errors.CommandError("Failed to retrieve file system information about"

                              " path: %s - %s" % (path, e.strerror))