update_engine: Add Flush() to FileDescriptor

This patch adds Flush() function to the file descriptor. This function
should be called after each operation in order to ensure that data
resides to disk before any checkpointing happen. In addition, if any
future file descriptor that caches the data is added, this ensures
integrity of written data.

BUG=chromium:762815
TEST=brillo_update_payload verify

Change-Id: I12442142647605afef1b01dc932eb7cf182af85b
Reviewed-on: https://chromium-review.googlesource.com/674163
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
4 files changed
tree: 316091196864f617a21d8511a19cff72d9b67098
  1. .gitignore
  2. Android.mk
  3. CPPLINT.cfg
  4. MODULE_LICENSE_APACHE2
  5. NOTICE
  6. OWNERS
  7. PRESUBMIT.cfg
  8. PREUPLOAD.cfg
  9. UpdateEngine.conf
  10. WATCHLISTS
  11. binder_bindings/
  12. binder_service_android.cc
  13. binder_service_android.h
  14. binder_service_brillo.cc
  15. binder_service_brillo.h
  16. boot_control_android.cc
  17. boot_control_android.h
  18. boot_control_chromeos.cc
  19. boot_control_chromeos.h
  20. boot_control_chromeos_unittest.cc
  21. boot_control_recovery.cc
  22. boot_control_recovery.h
  23. boot_control_recovery_stub.cc
  24. certificate_checker.cc
  25. certificate_checker.h
  26. certificate_checker_unittest.cc
  27. chrome_browser_proxy_resolver.cc
  28. chrome_browser_proxy_resolver.h
  29. chrome_browser_proxy_resolver_unittest.cc
  30. client_library/
  31. common/
  32. common_service.cc
  33. common_service.h
  34. common_service_unittest.cc
  35. connection_manager.cc
  36. connection_manager.h
  37. connection_manager_android.cc
  38. connection_manager_android.h
  39. connection_manager_interface.h
  40. connection_manager_unittest.cc
  41. connection_utils.cc
  42. connection_utils.h
  43. daemon.cc
  44. daemon.h
  45. daemon_state_android.cc
  46. daemon_state_android.h
  47. daemon_state_interface.h
  48. dbus_bindings/
  49. dbus_connection.cc
  50. dbus_connection.h
  51. dbus_service.cc
  52. dbus_service.h
  53. dbus_test_utils.h
  54. fake_file_writer.h
  55. fake_p2p_manager.h
  56. fake_p2p_manager_configuration.h
  57. fake_shill_proxy.cc
  58. fake_shill_proxy.h
  59. fake_system_state.cc
  60. fake_system_state.h
  61. generate_pc_file.sh
  62. hardware_android.cc
  63. hardware_android.h
  64. hardware_chromeos.cc
  65. hardware_chromeos.h
  66. hardware_chromeos_unittest.cc
  67. image_properties.h
  68. image_properties_android.cc
  69. image_properties_chromeos.cc
  70. image_properties_chromeos_unittest.cc
  71. init/
  72. libcurl_http_fetcher.cc
  73. libcurl_http_fetcher.h
  74. libupdate_engine-client-test.pc.in
  75. libupdate_engine-client.pc.in
  76. local_coverage_rate
  77. main.cc
  78. metrics.cc
  79. metrics.h
  80. metrics_utils.cc
  81. metrics_utils.h
  82. metrics_utils_unittest.cc
  83. mock_certificate_checker.h
  84. mock_connection_manager.h
  85. mock_file_writer.h
  86. mock_omaha_request_params.h
  87. mock_p2p_manager.h
  88. mock_payload_state.h
  89. mock_power_manager.h
  90. mock_proxy_resolver.h
  91. mock_update_attempter.h
  92. network_selector.h
  93. network_selector_android.cc
  94. network_selector_android.h
  95. network_selector_interface.h
  96. network_selector_stub.cc
  97. network_selector_stub.h
  98. omaha_request_action.cc
  99. omaha_request_action.h
  100. omaha_request_action_unittest.cc
  101. omaha_request_params.cc
  102. omaha_request_params.h
  103. omaha_request_params_unittest.cc
  104. omaha_response.h
  105. omaha_response_handler_action.cc
  106. omaha_response_handler_action.h
  107. omaha_response_handler_action_unittest.cc
  108. omaha_utils.cc
  109. omaha_utils.h
  110. omaha_utils_unittest.cc
  111. p2p_manager.cc
  112. p2p_manager.h
  113. p2p_manager_unittest.cc
  114. parcelable_update_engine_status.cc
  115. parcelable_update_engine_status.h
  116. payload_consumer/
  117. payload_generator/
  118. payload_state.cc
  119. payload_state.h
  120. payload_state_interface.h
  121. payload_state_unittest.cc
  122. power_manager_android.cc
  123. power_manager_android.h
  124. power_manager_chromeos.cc
  125. power_manager_chromeos.h
  126. power_manager_interface.h
  127. proxy_resolver.cc
  128. proxy_resolver.h
  129. proxy_resolver_unittest.cc
  130. pylintrc
  131. real_system_state.cc
  132. real_system_state.h
  133. run_unittests
  134. sample_images/
  135. sample_omaha_v3_response.xml
  136. scripts/
  137. service_delegate_android_interface.h
  138. service_observer_interface.h
  139. shill_proxy.cc
  140. shill_proxy.h
  141. shill_proxy_interface.h
  142. sideload_main.cc
  143. system_state.h
  144. tar_bunzip2.gypi
  145. test_http_server.cc
  146. test_subprocess.cc
  147. testrunner.cc
  148. unittest_key.pem
  149. unittest_key2.pem
  150. update_attempter.cc
  151. update_attempter.h
  152. update_attempter_android.cc
  153. update_attempter_android.h
  154. update_attempter_unittest.cc
  155. update_engine-client.gyp
  156. update_engine.conf
  157. update_engine.gyp
  158. update_engine.rc
  159. update_engine_client.cc
  160. update_engine_client_android.cc
  161. update_manager/
  162. update_metadata.proto
  163. update_payload_key/
  164. update_status_utils.cc
  165. update_status_utils.h
  166. utils_android.cc
  167. utils_android.h