kernels.py 3.8 KB

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  1. #!/usr/bin/python2
  2. # -*- encoding: utf8 -*-
  3. #
  4. # The Qubes OS Project, http://www.qubes-os.org
  5. #
  6. # Copyright (C) 2010-2015 Joanna Rutkowska <joanna@invisiblethingslab.com>
  7. # Copyright (C) 2015 Wojtek Porczyk <woju@invisiblethingslab.com>
  8. # Copyright (C) 2016 Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
  9. #
  10. # This program is free software; you can redistribute it and/or modify
  11. # it under the terms of the GNU General Public License as published by
  12. # the Free Software Foundation; either version 2 of the License, or
  13. # (at your option) any later version.
  14. #
  15. # This program is distributed in the hope that it will be useful,
  16. # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. # GNU General Public License for more details.
  19. #
  20. # You should have received a copy of the GNU General Public License along
  21. # with this program; if not, write to the Free Software Foundation, Inc.,
  22. # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23. #
  24. ''' This module contains pool implementations for different OS kernels. '''
  25. import os
  26. from qubes.storage import Pool, StoragePoolException, Volume
  27. class LinuxModules(Volume):
  28. ''' A volume representing a ro linux kernel '''
  29. rw = False
  30. def __init__(self, target_dir, kernel_version, **kwargs):
  31. kwargs['vid'] = kernel_version
  32. super(LinuxModules, self).__init__(**kwargs)
  33. self.kernels_dir = os.path.join(target_dir, kernel_version)
  34. self.path = os.path.join(self.kernels_dir, 'modules.img')
  35. self.vmlinuz = os.path.join(self.kernels_dir, 'vmlinuz')
  36. self.initramfs = os.path.join(self.kernels_dir, 'initramfs')
  37. class LinuxKernel(Pool):
  38. ''' Provides linux kernels '''
  39. driver = 'linux-kernel'
  40. def __init__(self, name=None, dir_path=None):
  41. assert dir_path, 'Missing dir_path'
  42. super(LinuxKernel, self).__init__(name=name)
  43. self.dir_path = dir_path
  44. def init_volume(self, vm, volume_config):
  45. assert 'volume_type' in volume_config, "Volume type missing " \
  46. + str(volume_config)
  47. volume_type = volume_config['volume_type']
  48. if volume_type != 'read-only':
  49. raise StoragePoolException("Unknown volume type " + volume_type)
  50. volume = LinuxModules(self.dir_path, vm.kernel, **volume_config)
  51. _check_path(volume.path)
  52. _check_path(volume.vmlinuz)
  53. _check_path(volume.initramfs)
  54. return volume
  55. def clone(self, source, target):
  56. return target
  57. def create(self, volume, source_volume):
  58. return volume
  59. def commit_template_changes(self, volume):
  60. return volume
  61. @property
  62. def config(self):
  63. return {
  64. 'name': self.name,
  65. 'dir_path': self.dir_path,
  66. 'driver': LinuxKernel.driver,
  67. }
  68. def destroy(self):
  69. pass
  70. def remove(self, volume):
  71. pass
  72. def rename(self, volume, old_name, new_name):
  73. return volume
  74. def setup(self):
  75. pass
  76. def start(self, volume):
  77. path = volume.path
  78. if not os.path.exists(path):
  79. raise StoragePoolException('Missing kernel modules: %s' % path)
  80. return volume
  81. def stop(self, volume):
  82. pass
  83. @property
  84. def volumes(self):
  85. ''' Return all known kernel volumes '''
  86. return [LinuxModules(self.dir_path,
  87. kernel_version,
  88. pool=self.name,
  89. name=kernel_version,
  90. volume_type='read-only')
  91. for kernel_version in os.listdir(self.dir_path)]
  92. def _check_path(path):
  93. ''' Raise an :py:class:`qubes.storage.StoragePoolException` if ``path`` does
  94. not exist.
  95. '''
  96. if not os.path.exists(path):
  97. raise StoragePoolException('Missing file: %s' % path)