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android-review.linaro.org / platform / system / vold / 981222f500baffae98bfd5949de41257a8238074
commit981222f500baffae98bfd5949de41257a8238074[log] [tgz]
authorZim <zezeozue@google.com>Mon Sep 09 10:24:44 2019 +0100
committerZim <zezeozue@google.com>Tue Sep 24 10:39:13 2019 +0100
tree057708db93a1d45cb79e4ed13b5da4989a4aa7f2
parente94ef6b04d9ae5f7a32d881cf029abe357354632 [diff]
Bind mount lower filesystem during FUSE mount

When mounting a FUSE device on /mnt/user/<userid>/<vol>,
bind mount the correspoinding lower filesystem path to
/mnt/pass_through/<userid>/<vol>. At Zygote fork time, an
app with the right privilege will have the pass_through path
bind mounted into /storage instead of the /mnt/user path.

This provides such an app direct access to the lower filesystem
without going through FUSE.

Bug: 140064376
Test: mount(8) shows /mnt/pass_through/0/emulated is a bind
mount of the lower fs

Change-Id: I32c3cad64138910fcec9fb8f66b206706b5fd139
4 files changed
tree: 057708db93a1d45cb79e4ed13b5da4989a4aa7f2
  1. bench/
  2. binder/
  3. fs/
  4. model/
  5. tests/
  6. .clang-format ⇨ ../../build/soong/scripts/system-clang-format
  7. Android.bp
  8. AppFuseUtil.cpp
  9. AppFuseUtil.h
  10. Benchmark.cpp
  11. Benchmark.h
  12. BenchmarkGen.h
  13. CheckEncryption.cpp
  14. CheckEncryption.h
  15. Checkpoint.cpp
  16. Checkpoint.h
  17. CleanSpec.mk
  18. cryptfs.cpp
  19. cryptfs.h
  20. Devmapper.cpp
  21. Devmapper.h
  22. EncryptInplace.cpp
  23. EncryptInplace.h
  24. FileDeviceUtils.cpp
  25. FileDeviceUtils.h
  26. FsCrypt.cpp
  27. FsCrypt.h
  28. IdleMaint.cpp
  29. IdleMaint.h
  30. KeyBuffer.cpp
  31. KeyBuffer.h
  32. Keymaster.cpp
  33. Keymaster.h
  34. KeyStorage.cpp
  35. KeyStorage.h
  36. KeyUtil.cpp
  37. KeyUtil.h
  38. Loop.cpp
  39. Loop.h
  40. main.cpp
  41. MetadataCrypt.cpp
  42. MetadataCrypt.h
  43. MoveStorage.cpp
  44. MoveStorage.h
  45. NetlinkHandler.cpp
  46. NetlinkHandler.h
  47. NetlinkManager.cpp
  48. NetlinkManager.h
  49. OWNERS
  50. PREUPLOAD.cfg
  51. Process.cpp
  52. Process.h
  53. ScryptParameters.cpp
  54. ScryptParameters.h
  55. secdiscard.cpp
  56. sehandle.h
  57. Utils.cpp
  58. Utils.h
  59. vdc.cpp
  60. vdc.rc
  61. vold.rc
  62. vold_prepare_subdirs.cpp
  63. VoldNativeService.cpp
  64. VoldNativeService.h
  65. VoldUtil.cpp
  66. VoldUtil.h
  67. VolumeManager.cpp
  68. VolumeManager.h
  69. wait_for_keymaster.cpp
  70. wait_for_keymaster.rc