tree 363427d055e3aebed09018403829bdce694a4a3f
parent 811de623a0e74c439cf51926b7ddc8738ecab0d2
author Sudheer Shanka <sudheersai@google.com> 1547064915 -0800
committer Sudheer Shanka <sudheersai@google.com> 1547866135 -0800

Create a new MOUNT_EXTERNAL_LEGACY storage mode.

Apps that are already installed on the device before isolated_storage
feature is enabled will be granted MOUNT_EXTERNAL_LEGACY mode. In this
mode, /mnt/runtime/write will be mounted at /storage giving them same
level of access as in P.

A new mount directory /mnt/runtime/full is also created which will be
used for mounting at /storage for apps started with MOUNT_EXTERNAL_FULL
mode. This will allow apps with WRITE_MEDIA_STORAGE permission to
read/write anywhere on the secondary devices without needing to bypass
sdcardfs.

Bug: 121277410
Test: manual
Test: atest android.appsecurity.cts.ExternalStorageHostTest
Change-Id: Icc1ff9da35545692daedef7173d7c89290dd2766