When a volume is ejected from a user but not removed from the device
and mounted again by calling StorageManager#mount, the volume is
mounted for the user from which it was last ejected. This causes the
path of the mounted volume to be inaccessible to the current user.
Whenever StorageManager#mount is called, check if the
VolumeInfo#mountUserId is same as the current userId maintained by
StorageManagerService, if it is not, change the mountUserId for the
Volume to the current userId known to StorageManagerService if it
is not the primary volume and the volume is visible.
This change also fixes a bug where the volumes are unmounted for the
wrong user which causes StorageSessionController go out of sync
which would cause errors during mounting the volumes again as it
maintains sessions per user. The bug also caused volume event
broadcasts to be sent to wrong user handles. To solve the issue
add an extra paramter in IVoldListener#onVolumeStateChanged for userId
which will update the copy which is used for informing
StorageSessionController and also for sending broadcasts.
Test: Perform the following steps:
1. Format SD Card as portable storage in system user.
2. Eject the SD Card from Storage Settings.
3. Switch to a non-system user
4. Mount the SD Card again.
5. Check that the Storage Summary is shown correctly instead
of 0B out of 0B.
Also, checked from the logs the volume state broadcasts are sent to
the correct user handles.
Change-Id: I60b8954cdaee4a54ea6a6299fe5ddda2006faf1c
When we're mounting a private volume, we create stacked emulated volumes
on top of it. Due to the ordering there, we would broadcast the emulated
volumes being created *before* the "mounted" status update. This in turn
could cause us to try and mount these emulated volumes before the
underlying private volume is really mounted. This is problematic in
particular on devices that support a filesystem keyring, where we need
to do some additional setup before the devices can be used.
While we could modify StorageManagerService to delay the mount, a safer
fix at this stage of the release is to just fix the ordering of these
events. To achieve that, add a simple postMount() helper, that is called
after a succesful mount. This allows us to setup the volume properly
before trying to mount any stacked volumes.
Bug: 151079464
Test: atest AdoptableHostTest
Change-Id: I2cc4113d4d71d89aa629bb9c0fa9be441355c079
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
Mounting a FUSE path needs two steps:
1. Mounting the filesystem
2. Starting the FUSE session in the FUSE daemon
The second part requires retriving an fd from (1) and the mount paths
and passing it to the FUSE daemon.
Previously, we'd return from the Vold mount call and mark the volume
as mounted while we scramble to do (2). This means there's a time
period where the Volume is marked as MOUNTED but not actually ready
and any IO access on the paths will hang forever. This could also be
misleading when interpreting bug reports.
Now, we block the Vold mount call until the FUSE session is started
Test: atest AdoptableHostTest
Bug: 144275217
Change-Id: I45238a31df71286f67ef1c65c711d0085d72e97f
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
Also allow the state just before doMount() as a valid state for setting
fuse fd.
Test: manual
BUG:140173712
Change-Id: I012f8a83fef00e68f33010954fbc2ebc53cf8f1d
Since system_server cannot mount devices by itself,
add a binder interface to vold that system_server
can call to initiate this mount when required.
BUG: 135341433
Test: manual
Test: atest --test-mapping packages/providers/MediaProvider
Test: ExternalStorageHostTest DownloadProviderTests
Change-Id: If4fd02a1f1a8d921a3f96783d8c73e085c5b7ca1
We make some of the C++ member functions 'const', to reflect how
they (don't) affect the state of the class.
Test: TreeHugger
Change-Id: Iec1c2801bfe721e2741406ed1ac0ef95662840a6
- Also update vold to create sandboxes for secondary storage devices.
- Since bind mounts are created in the process specific namespaces, we
don't need /mnt/storage anymore which we were using it to prevent
some bind mounts from propagating onto /mnt/runtime/write.
- Create bind mounts for {media,obb} dirs similar to data dir in
per process namespace.
- Also fix a bug where we are not passing correct packages to vold when
a new user starts.
Bug: 111890351
Test: manual
Change-Id: I7849efc4fbf3c654606fa30de7ab2de0236d766f
Apply clang-format to fix the remaining files not fixed by
change I23cde3f0bbcac13bef555d13514e922c79d5ad48
Test: Format-only changes; treehugger suffices.
Change-Id: I1bfd5c8d68d298596875d5edae26cdfe27c03489
Vold is updated to create package specific sandboxes for primary
volume and mount them at
"/mnt/user/<user-id>/package/<package-name>/<primary-label>".
This will later be mounted at /storage when a new process starts.
Bug: 111890351
Test: Manually verified that a package has access to "/sdcard" and
"/storage/emulated/0", both of which are just the package specific
sandboxes and the package doesn't have access to other sandboxes
and can't see other package names.
Change-Id: I72dc8ae9eb2260a298159c5de18387dad2f9de48
Create IVoldListener and move most unsolicited vold events over to
this new interface. The remaining events will be routed through
method-specific listeners instead of a global one.
Move to upstream DISALLOW_COPY_AND_ASSIGN macro.
Test: cts-tradefed run commandAndExit cts-dev -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.DirectBootHostTest
Test: cts-tradefed run commandAndExit cts-dev -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.AdoptableHostTest
Test: cts-tradefed run commandAndExit cts-dev -m CtsOsTestCases -t android.os.storage.cts.StorageManagerTest
Bug: 13758960
Change-Id: Ib9293487db2d525a76b9b9c2e9ac18d98601c6cf
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
