Commits on Jul 2, 2017

1. multirom: Fix /data/media/0 media linkage for SDCardFS …

    * In a MultiROM environment, /data is owned by the
       booted secondary ROM, specifically it can even be
       part of an external MicroSD (for example with EXT4)
   
    * By using a ROM supporting SDCardFS, the interal
       media storage will be accessed through its driver,
       but the fact /data/media/0 could be used under
       specific conditions means the /data/media mounts
       used by the emulated storage loop through:
        - /data/media (external ROM)
        - /data/media/0 (internal storage)
   
    * SDCardFS prevents "cross-device" linkage by
       returning -EXDEV, breaking internal storage access
   
    * Always use the proper /data/media path on newer APIs
       to avoid any cross-device linkage of internal storage,
       and preserve old handling up to API 22 (Android 5.1)
   
   Change-Id: Ib49db68eede289d3943b9537d542eef5082e3118
   Signed-off-by: Adrian DC <radian.dc@gmail.com>

   

   AdrianDC committed Jul 2, 2017
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