We really only support a single emulated volume on the device at a
time, either on internal storage, or moved to a private volume. To
avoid kicking off a giant rescan of all media when moved, keep all
the paths the same when mounted as primary.
Also ensure we have /data/media/0 ready on private volumes.
Bug: 20275423
Change-Id: I0c102f430b865ca7536772b1fae56d8c9660a97a
Refactor fstrim code to be encapsulated in unique task object, and
give it option of benchmarking when finished. Trimming now includes
both storage from fstab and adopted private volumes. Cleaner timing
stats are logged for each unique volume.
Add wakelock during ongoing async move tasks. Push disk sysfs path
to framework so it can parse any SD card registers as desired.
Bug: 21831325
Change-Id: I76577685f5cae4929c251ad314ffdaeb5eb1c8bf
In order to compare results from readlink() calls, we need to null
terminate the read value, otherwise we can end up doing an infinitely
recursive remount in the root namespace.
When remounting inside a namespace, unmount all existing mounts before
mounting the new storage into place. This also means we need to mount
the user-specific symlinks back into place.
Skip spinning up the FUSE daemon when not visible, otherwise we get
stuck waiting for a daemon that never shows up.
Bug: 22192518, 22204412
Change-Id: Icc7db822354ab7ffc47c39cd0611f65edecc32e5
Some storage devices can be formatted as bare partitions, without an
MBR or GPT header. If we found no partitions, try poking at the raw
disk, and treat it as a public volume if we found a valid filesystem.
Bug: 20503551
Change-Id: I80304e1ad865435321c341b667c0daf2daf4d56c
Now that we're treating storage as a runtime permission, we need to
grant read/write access without killing the app. This is really
tricky, since we had been using GIDs for access control, and they're
set in stone once Zygote drops privileges.
The only thing left that can change dynamically is the filesystem
itself, so let's do that. This means changing the FUSE daemon to
present itself as three different views:
/mnt/runtime_default/foo - view for apps with no access
/mnt/runtime_read/foo - view for apps with read access
/mnt/runtime_write/foo - view for apps with write access
There is still a single location for all the backing files, and
filesystem permissions are derived the same way for each view, but
the file modes are masked off differently for each mountpoint.
During Zygote fork, it wires up the appropriate storage access into
an isolated mount namespace based on the current app permissions. When
the app is granted permissions dynamically at runtime, the system
asks vold to jump into the existing mount namespace and bind mount
the newly granted access model into place.
Bug: 21858077
Change-Id: Iade538e4bc7af979fe20095f74416e8a0f165a4a
Report both the disk and the partition GUID for private volumes to
userspace, and offer to forget the encryption key for a given
partition GUID.
Bug: 21782268
Change-Id: Ie77a3a58e47bf3563cdb3e4b0edfab1de4d0e6b4
Paul Crowley
Paul Lawrence
Jeff Sharkey
Makoto Onuki
Shawn Willden