Allows for easy override of fuse-bpf for testing without a rebuild
Test: Set this property with ro.fuse.bpf.enabled both true and false
Make sure ro.fuse.bpf.is_running is expected result
Bug: 219958836
Change-Id: I589511ea5cda76db1d55bdc2124fb546907d8acd
With the way the FUSE mount point are currently setup for emulated
volumes, there can be multiple paths that serve the same files on the
lower filesystem; eg
* /mnt/user/0/emulated/0/Android
* /mnt/user/10/emulated/0/Android
both refer to the same file on the lower filesystem:
* /data/media/0/Android
this is normally not a problem, because cross-user file access is not
allowed, and so the FUSE daemon won't serve files for other users.
With clone profiles this is no longer true however, as their volumes
are accessible by each other.
So, it can happen that an app running in clone profile 10 accesses
"/mnt/user/10/emulated/0/Android", which would be served by the FUSE
daemon for the user 10 filesystem.
At the same time, an app running in the owner profile 0 accesses
"mnt/user/0/emulated/0/Android", which would be served by the FUSE
daemon for the user 0 filesystem.
This can cause page cache inconsistencies, because multiple FUSE daemons
can be running on top of the same entries in the lower filesystem.
To prevent this, use bind mounts to make sure that cross-profile
accesses actually end up in the FUSE daemon to which the volume
belongs: "/mnt/user/10/emulated/0" is bind-mounted to
"/mnt/user/0/emulated/0", and vice-versa.
Bug: 228271997
Test: manual
Change-Id: Iefcbc813670628b329a1a5d408b6126b84991e09
FUSE BPF aims at achieving comparable performance to bind-mounts, with
the flexibility of FUSE.
Disable data and obb bind-mounts in favor of the FUSE filesystem if the
system implements the feature.
Bug: 202785178
Test: mount | grep obb
Signed-off-by: Alessio Balsini <balsini@google.com>
Change-Id: Ia8b289b84542125831a857b559bb6f93afbee494
Because we want all other paths (in particular Android/media) to go
through FUSE.
Also use scope_guard to make unwinding some failures easier.
Bug: 151272568
Test: atest AdoptableHostTest
Change-Id: Ib487b9071b5b212c7bb12ce54f80c96d98acaef5
In EmulatedVolume#doMount, if some operations fail, we call
EmulatedVolume#doUnmount.
During this unmount we try to unmount Android/ causing a FUSE_LOOKUP
on the FUSE mount. If the FUSE mount is not up, this can hang.
Now we introduce a new state to prevent unmounting Android/ if it
wasn't mounted.
Test: atest AdoptableHostTest
Bug: 151685786
Change-Id: I6246d3910c352034d2a4fb09ad9c1e7fd91cba5e
Also, use the pids provided by system server to remount all existing
processes, so we don't need to do the heavy and unreliable scanning in
/proc anymore.
Bug: 149548518
Test: atest AdoptableHostTest
Change-Id: Ifb5b79a3bc5438f36e0d61ec8aec96bdbc60ca13
- Remove bind mounting Android/ code as we want to bind mount obb dir
for each process instead.
- Set property "vold.vold.fuse_running_users" as an array of user id
for which fuse is ready to use.
- After fuse is ready for a user, fork a background process in vold
to bind mount all direct boot apps for that user so its direct boot
apps obb dir will be mounted to lower fs for imporoved performance.
Bug: 148049767
Bug: 137890172
Test: After flag is enabled, AdoptableHostTest still pass.
Change-Id: I90079fbeed1c91f9780ca71e37b0012884680b7c
Normally sdcardfs takes care of setting up these directories on-demand,
for example when an app requests its private data directory to be
created. On devices without sdcardfs however, we ourselves need to make
sure to setup the UID/GID of these directories correctly.
Introduce a new PrepareAndroidDirs() function which sets the dirs up
correctly. On devices without sdcardfs, that means:
Path UID GID mode
/Android media_rw media_rw 771
/Android/data media_rw ext_data_rw 771
/Android/obb media_rw ext_obb_rw 771
Bug: 146419093
Test: wipe Android/, reboot, with and without sdcardfs, verify
contents
Change-Id: I3a879089422c7fc449b6a3e6f1c4b386b86687a4
In preparation of sdcardfs going away on devices launching with R,
conditionally use it.
Bug: 146419093
Test: cuttlefish with sdcardfs, cuttlefish without sdcardfs but with
FUSE
Change-Id: I2c1d4b428dcb43c3fd274dde84d5088984161993
The pass-through mount is used by MediaProvider to access external
storage. Previously, it was the raw filesystem (eg ext4/f2fs); the
problem with that is that the permissions on that filesystem don't allow
MediaProvider to access all the files it needs to - in particular
directories under Android/
To solve this problem, we can have the pass-through mount sit on top of
sdcardfs instead of the raw filesystem. This means we need to mount
sdcardfs even in case we're using FUSE, but we already needed to do this
anyway for other performance reasons.
Bug: 135341433
Test: atest AdoptableHostTest
Change-Id: I893d5e5076c5096d2d55212f643c9a857242e964
Long before scoped storage, FUSE was used to create several views of the
filesystem; this was later replaced by sdcardfs, yet the code still
references FUSE in variables and log messages. Fix those up to avoid
confusion with the "new FUSE".
Bug: 135341433
Test: atest AdoptableHostTest
Change-Id: I2966c5f95d6f38df36a20cdfdd0b95b3051f3f1e
Up until now, the FUSE mount logic has made two assumptions:
1. The primary external volume is an emulated volume on /data/media
2. Only the primary user is running, as user zero
These assumptions are fixed by the following changes
creating an EmulatedVolume per Android user and changing the
VolumeBase id format to append the user to the id, so
s/emulated/emulated-0/. This allows us mount separate volumes per user
Some additional refactorings to re-use/clean up code.
Test: adb shell sm set-virtual-disk and partition disk operations work
even after setting up a work profile
Bug: 135341433
Change-Id: Ifabaa12368e5a591fbcdce4ee71c83ff35fdac6b
This will be used for system internals to access
secondary volumes without having to bypass sdcardfs.
Bug: 121277410
Test: manual
Exempt-From-Owner-Approval: Got approval on internal master
Change-Id: I9b3e33f6c6e426e83469b8030b02d59c02183946
This moves fstrim, obb and appfuse commands over to the new Binder
interface. This change also separates creating/destroying and
mounting/unmounting of OBB volumes, which means they finally flow
nicely into the modern VolumeInfo/VolumeBase design.
We now generate unique identifiers for all OBB volumes, instead of
using a shady MD5 hash.
Change all "loop" and "dm" devices to tag the kernel resources with
a vold-specific prefix so that we can clean them up if vold crashes;
there are new destroyAll() methods that handle this cleanup.
Move appfuse mounting/unmounting into VolumeManager so it can be
shared. Move various model objects into a separate directory to
tidy things up.
Test: cts-tradefed run commandAndExit cts-dev -m CtsOsTestCases -t android.os.storage.cts.StorageManagerTest
Bug: 13758960
Change-Id: I7294e32b3fb6efe07cb3b77bd20166e70b66958f
