Prepare these directories during initUser0. This greatly shortens the
gap between the creation and encryption of /data/user/0, and this makes
it possible to remove init's write access to all directories containing
per-user encrypted directories.
Bug: 156305599
Change-Id: Ibf3d25356e8f0bca70da078c5d2428ae8615240e
There is no reason for this function to sometimes return the legacy
alias "/data/data" for /data/user/0. Just use /data/user/0 instead.
Bug: 156305599
Change-Id: I305a9463c1bf0a59495c34ef33430f92257c2f0d
persist.sys.fuse.bpf.enable and ro.fuse.bpf.enabled are both used to
decide if FUSE-BPF must be enabled or not.
- ro.fuse.bpf.enabled is a read-only property that is set in the device
makefile and would allow dogfooding devices to turn the feature
on/off.
- persist.sys.fuse.bpf.enable is a system property that overrides
ro.fuse.bpf.enabled and can only be set manually during the
development to simplify the testing of FUSE-BPF, mostly to compare if
those tests that are failing with FUSE-BPF were failing also without
the feature.
Bug: 202785178
Test: adb logcat | grep "FuseDaemon" | grep BPF
Ignore-AOSP-First: FUSE-BPF is not available in AOSP
Signed-off-by: Alessio Balsini <balsini@google.com>
Change-Id: I23f9d27172907f6c72c73bea22e4a7e0ac643888
We want to store sdk data on the same volume as app data. Since sdk data
is stored in misc_ce and misc_de directory, we need to ensure they exist
on adopted storage mounted at /mnt/expand/<volume-uuid>.
This CL creates `/mnt/expand/<volume-uuid>/misc_{ce,de}` directories
when disk is mouted and then when user storage is prepared, the sdk root
directory is created.
By having these directories, we can now move the sdk data to other
volume when app data is moved.
Bug: b/222034645
Test: atest SdkSandboxStorageHostTest (see ag/17120883)
Ignore-AOSP-First: End to end test added which exists in internal branch
only. Will cherry-pick this CL to aosp standalone once it is safely
merged to internal branch.
Change-Id: I0e73d9ce105abec4b77c378cde58aa7365258f01
Merged-In: I0e73d9ce105abec4b77c378cde58aa7365258f01
(cherry picked from commit b459591fd1)
We want to store sdk data on the same volume as app data. Since sdk data
is stored in misc_ce and misc_de directory, we need to ensure they exist
on adopted storage mounted at /mnt/expand/<volume-uuid>.
This CL creates `/mnt/expand/<volume-uuid>/misc_{ce,de}` directories
when disk is mouted and then when user storage is prepared, the sdk root
directory is created.
By having these directories, we can now move the sdk data to other
volume when app data is moved.
Bug: b/222034645
Test: atest SdkSandboxStorageHostTest (see ag/17120883)
Ignore-AOSP-First: End to end test added which exists in internal branch
only. Will cherry-pick this CL to aosp standalone once it is safely
merged to internal branch.
Change-Id: I0e73d9ce105abec4b77c378cde58aa7365258f01
Vold was trusting system_server too much and allowed for pretty
much any path in mount()/bindMount() calls for incremental.
This CL adds validation to make sure it's only accessing own
directories. This includes enforcing no symlinks in the paths
Bug: 198657657
Bug: 216722132
Test: manual
Change-Id: I6035447f94ef44c4ae3294c3ae47de2d7210683a
Merged-In: I6035447f94ef44c4ae3294c3ae47de2d7210683a
Android should only abort fuse connections for fuse fs. It shouldn't
touch fuse connections for virtiofs.
Bug: 162284193
Test: manual - Restart zygote, no 'Transport endpoint is not connected' error.
Change-Id: Ie3536734531404e98ad1b6594ab3c52e919b22b7
Vold was trusting system_server too much and allowed for pretty
much any path in mount()/bindMount() calls for incremental.
This CL adds validation to make sure it's only accessing own
directories. This includes enforcing no symlinks in the paths
Ignore-AOSP-First: security fix
Bug: 198657657
Test: manual
Change-Id: I6035447f94ef44c4ae3294c3ae47de2d7210683a
Merged-In: I6035447f94ef44c4ae3294c3ae47de2d7210683a
Certain setups of cards can take a long time to fsck.
This adds a timeout to avoid angering the watchdog
Bug: 195615825
Test: Mount removable storage with ~30K folders,
obeserve timeout in logs
Change-Id: I8b6e2658cf7024645f976599851bbee0557745ca
security_context_t has been marked as deprecated in libselinux from
version 3.2. Update to the `char*` type.
Bug: 190808996
Test: m
Change-Id: I6f40e161251c79893d41e12c368715736578aacc
Otherwise, the only sign of what went wrong may be system_server
logging a "ServiceSpecificException".
Bug: 187079978
Change-Id: I59b2ba2b0e679dfd1ec1fd8fff6790256fbfdf29
Originally it kills all the apps with obb and data mounted.
Due to recent changes, all apps will have obb and data dirs mounted
in default root namespace. Hence all apps will be killed by
by KillProcessesWithMounts().
To fix this, we also check if the dir is mounted as tmpfs,
as the default namespace one is bind mounted to lowerfs,
which app data isolation is mounted as tmpfs, so we only
kill the process that have obb dir mounted as tmpfs.
Bug: 148049767
Test: Able to boot without warnings
Change-Id: I5f862ad6f64f5df739b68ea7c9815352bae3be5c
Merged-In: I45d9a63ed47cbc27aebb63357a43f51ad62275db
Originally it kills all the apps with obb and data mounted.
Due to recent changes, all apps will have obb and data dirs mounted
in default root namespace. Hence all apps will be killed by
by KillProcessesWithMounts().
To fix this, we also check if the dir is mounted as tmpfs,
as the default namespace one is bind mounted to lowerfs,
which app data isolation is mounted as tmpfs, so we only
kill the process that have obb dir mounted as tmpfs.
Bug: 148049767
Test: Able to boot without warnings / errors
Ignore-AOSP-First: Merge it along with other CLs, will cherry-pick to
AOSP afterwards.
Change-Id: I45d9a63ed47cbc27aebb63357a43f51ad62275db
The FUSE daemon is often holding fds on behalf of other apps and if a
volume is ejected the daemon would often get killed first while vold
is walking /proc/<pid>/fd to kill pids with open fds on the
volume. This is required for the volume unmount successfully.
To mitigate this, we avoid killing the FUSE daemon during the usual
/proc walk. This ensures that we first send SIGINT, SIGTERM and
SIGKILL to other apps first. There is an additional SIGKILL attempt
and on that last attempt, we kill the FUSE daemon as a last resort
Test: Manual
Bug: 171673908
Change-Id: I100d2ce4cb4c145cbb49e0696842e97dfba2c1c9
This directory is used as a root for external storage on adopted storage
devices. It needs to be writable by processes holding the AID_MEDIA_RW
GID permission; in particular, it should be writable by the FUSE daemon.
On devices with sdcardfs, this was ensured automatically, because
sdcardfs presented a view of this directory that was writable, that we
could use for the FUSE daemon. But on devices without sdcardfs, the FUSE
daemon sees the raw filesystem and its permissions. This also means that
files created by the FUSE daemon will have their uid/gid set to the uid
of the FUSE daemon; to ensure these files stay writable to other system
applications that have AID_MEDIA_RW, use a default ACL to make sure the
gid stays AID_MEDIA_RW.
In particular, this fixes an issue with app cloning, where we want the
FUSE daemon of user 0 to be able to access the files of the app clone
user, and vice versa.
Bug: 154057120
Test: inspect uid/gid of /data/media/0 and contents
Change-Id: Ic5d63457ec917ea407b900dbb7773d89311780c6
vold creates some directories for storing encryption keys if they don't
already exist, potentially including parent directories:
/metadata/vold/metadata_encryption
/data/misc/vold/volume_keys/$volume_uuid
/data/misc_de/$user/vold/volume_keys/$volume_uuid
/data/misc_ce/$user/vold/volume_keys/$volume_uuid
Currently fs_mkdirs() is used for this. However, fs_mkdirs() doesn't
include the fsync()s of the parent directories that are needed to ensure
that the new directories are persisted to disk right away -- which is
important for encryption keys.
Add a utility function MkdirsSync() which does what is needed, and make
the appropriate places call it.
Test: Booted and checked log for "Created directory" message.
Also ran 'atest vold_tests' to run the new unit test.
Change-Id: Ie9917b616433080139b8db3fd6877203ee6faf77
When an FBE or metadata encryption key is created, it's important that
it be persisted to disk right away; otherwise the device may fail to
boot after an unclean shutdown. storeKey() has the needed fsync()s.
However, storeKeyAtomically() doesn't, as it doesn't fsync() the parent
directory of key_path after it renames tmp_path to it.
Two callers do fsync() the parent directory themselves, but others
don't. E.g., the metadata encryption key doesn't get properly synced.
Therefore, add the needed fsync() to storeKeyAtomically() so that it
gets done for everyone.
Also remove the now-unneeded fsync()s from the two callers that did it
themselves.
Change-Id: I342ebd94f0a3d2bf3a7a443c35b6bda0f12e1ab2
This reverts commit a71323ec0e.
Reason for revert: b/177926359 - note that this is a Google testing infrastructure issue, and no issue with this patch. Partners can keep using this patch. It will be resubmitted in a few weeks.
Change-Id: Ia13279ac1aafa2e4425c4527aeadd5d0fadbc2e4
This directory is used as a root for external storage on adopted storage
devices. It needs to be writable by processes holding the AID_MEDIA_RW
GID permission; in particular, it should be writable by the FUSE daemon.
On devices with sdcardfs, this was ensured automatically, because
sdcardfs presented a view of this directory that was writable, that we
could use for the FUSE daemon. But on devices without sdcardfs, the FUSE
daemon sees the raw filesystem and its permissions. This also means that
files created by the FUSE daemon will have their uid/gid set to the uid
of the FUSE daemon; to ensure these files stay writable to other system
applications that have AID_MEDIA_RW, use a default ACL to make sure the
gid stays AID_MEDIA_RW.
In particular, this fixes an issue with app cloning, where we want the
FUSE daemon of user 0 to be able to access the files of the app clone
user, and vice versa.
Bug: 154057120
Test: inspect uid/gid of /data/media/0 and contents
Change-Id: Ib718b8362df84754ee3cac33865bca3c12df2e3a
This directory is used as a root for external storage on adopted storage
devices. It needs to be writable by processes holding the AID_MEDIA_RW
GID permission; in particular, it should be writable by the FUSE daemon.
On devices with sdcardfs, this was ensured automatically, because
sdcardfs presented a view of this directory that was writable, that we
could use for the FUSE daemon. But on devices without sdcardfs, the FUSE
daemon sees the raw filesystem and its permissions. This also means that
files created by the FUSE daemon will have their uid/gid set to the uid
of the FUSE daemon; to ensure these files stay writable to other system
applications that have AID_MEDIA_RW, use a default ACL to make sure the
gid stays AID_MEDIA_RW.
In particular, this fixes an issue with app cloning, where we want the
FUSE daemon of user 0 to be able to access the files of the app clone
user, and vice versa.
Bug: 154057120
Test: inspect uid/gid of /data/media/0 and contents
Change-Id: I6dfae41f9cb6a8283978b2667b02708a000f07c0
There've been reports of issues where, when a volume is ejected, the
MediaProvider process gets killed. This happens because the
MediaProvider has a file open on the volume (eg, during a scan). We do
abort the scan when the volume is ejected, however this could take some
time. So, we give MediaProvider a bit more time before getting killed,
by only looking for files open on the pass_through paths last. This
order anyway seems to make more sense - ideally we kill apps using
external storage before we unmount the pass_through path underlying it.
Bug: 171367622
Test: atets AdoptableHostTest
Change-Id: Ie8eacaa72a80ff8161ecf1e8c0243afcd890ee39
Remove the error-prone 'keepOld' parameter, and instead make begin()
(renamed to BeginKeymasterOp()) do all the key upgrade handling.
Don't handle /data and /metadata differently anymore. Previously, when
a checkpoint is active, key blob files were replaced on /data
immediately; only the actual Keymaster key deletion was delayed until
checkpoint commit. But it's easier to just delay the key blob file
replacement too, as we have to implement that for /metadata anyway.
Also be more vigilant about deleting any leftover upgraded keys.
Test: Tested on bramble using an OTA rvc-d1-release => master. In OTA
success case, verified via logcat that the keys were upgraded and
then were committed after the boot succeeded. In OTA failure
case, verified that the device still boots -- i.e., the old keys
weren't lost. Verified that in either case, no
keymaster_key_blob_upgraded files were left over. Finally, also
tried 'pm create-user' and 'pm remove-user' and verified via
logcat that the Keymaster keys still get deleted.
Change-Id: Ic9c3e63e0bcae0c608fc79050ca4a1676b3852ee
These ioctls take a pointer to an 'int' (or an 'unsigned int', it
doesn't matter), not an 'unsigned long'. See 'man ioctl_iflags'.
Presumably it happened to work anyway because Android only runs on
little endian platforms.
Bug: 146419093
Bug: 163453310
Change-Id: I73099dafd4ee8d497c0a754149271871a37454f6
Signed-off-by: Eric Biggers <ebiggers@google.com>
We previously only set +F for /data/media, but adopted storage needs
this as well. Instead we add support for adding attrs to PrepareDir.
Bug: 163453310
Test: sm set-virtual-disk true
follow UI setup and confirm +F on /mnt/expand/*/media
Change-Id: I08f13b57a4de3538e88b38eb95b0ac115a5a5ce8
Merged-In: I08f13b57a4de3538e88b38eb95b0ac115a5a5ce8
By default FUSE filesystems have a max_ratio of 1%, meaning only 1% of
dirty pages on the system can belong to a FUSE filesystem before we
start writing back pages (and throttling, if writeback can't keep up).
This limit is useful for untrusted filesystems, but in our case, we
trust the FUSE filesystem. Since FUSE writes result in writes to the
lower filesystem, FUSE should take at most 50%. Let's start with
changing max_ratio to 40%, to avoid needless throttling.
Bug: 159254170
Bug: 159770752
Test: inspect /sys/class/bdi manually after boot
Change-Id: I467e3770fc4afba0a08fa480c0b86aa054c8b875
For fuse read ahead can be configured by writing a value to the
/sys/class/bdi/{MAJOR}:{MINOR}/read_ahead_kb file.
There are several different ways of getting {MAJOR}:{MINOR} values of
the filesystem:
* Look at st_dev of stat("/mnt/user/0/emulated").
* Parse /proc/self/mountinfo.
Stat'ing approach is used since it's easier to implement.
Bug: 157982297
Test: atest vold_tests
Test: adb shell cat /proc/self/mountinfo to get MAJOR:MINOR
Test: adb shell cat /sys/class/bdi/{MAJOR}:{MINOR}/read_ahead_kb
Test: created public volume, checked it's read_ahead_kb is also 256
Change-Id: Id0c149c4af1ceabf3afc33b4100563a512b38316
On devices without sdcardfs, /Android/data/com.foo and
/Android/obb/com.foo can be written by other processes (eg installers);
in those cases, file ownership may be wrong. To ensure that the original
app always has access to the files contained in this directory, add a
group to the default ACL that matches the UID of the app. Since all apps
have their own UID also as their group ID, this ensures that things keep
working correctly.
Bug: 157530951
Test: atest
android.appsecurity.cts.ExternalStorageHostTest#testExternalStorageUnsharedObb
Change-Id: I829a2a7c7b578a8328643f38681e68796adcd6b2
Change-Id: Ibbc333fb395507363830dfcf5dc6f1cfd55f008d
This can be done through binder as well as vdc, using 'vdc volume
abort_fuse'.
Bug: 153411204
Test: adb shell vdc volume abort_fuse
Change-Id: I93e46dc1cd361729cc1162c63520cf73152ea409
This allows devices that have sdcardfs enabled in the kernel to not use
it. When external_storage.sdcardfs.enabled=0, sdcardfs will not be
mounted. This is treated as default true to not affect upgrading
devices. It does not use the old ro.sys.sdcardfs as that has been
repurposed over time and no longer can be relied on to turn off
sdcardfs. This is included within emulated_storage.mk
Bug: 155222498
Test: mount|grep "type sdcardfs" should find nothing after boot complete
if external_storage.sdcardfs.enabled=0
Change-Id: I23d75fb1225aeabbcb1a035ad62fd042b6b3c7b5
The Android Emulator isn't the only virtual device the virtio-block
detection code is useful for, and those platforms might not set any
discriminating properties to indicate that they are virtual.
Rework the virtio-block major detection to use /proc/devices instead
of hardcoding the assumption that any virtual platform can have
virtio-block at any experimental major; the new code permits only the
exact experimental major assigned to virtio-block.
The new code runs everywhere, but it will only run once and could be
expanded later to detect dynamic or experimental majors.
Bug: 156286088
Change-Id: Ieae805d08fddd0124a397636f04d99194a9ef7e5
Previously every directory on external storage had project ID quota
inheritance enabled; this means that if any new file/directory is
created under such a directory, it will inherit the project ID from the
parent. We use a default project ID of 1000 for generic directories, and
application-specific project IDs for app-specific directories.
MediaProvider is responsible for updating the quota type in the generic
directories, as it scans all files there. However, there is a problem
with this approach: if you move a file to a directory with project ID
inheritance set, and the project ID of that file differs from the
project ID of the dir, that results in an EXDEV error, and requires a
copy instead. For example, if /sdcard/DCIM/test.jpg has a project ID of
1003 (for images), and you try to move it to /sdcard/Pictures/test.jpg,
that would require a copy, because the project ID of /sdcard/Pictures is
1000.
While this is not a very common scenario, it's still better to avoid it.
Luckily we can - since MediaProvider anyway scans all files, it will set
the project ID on individual files correctly - there's no need to
inherit them.
We then only need to inherit quota in application-specific directories,
since in those directories the app can create files itself, and those
need to be tagged correctly.
This change enables that, by removing quota inheritance setting from the
top-level directory, and instead doing it for app-specific directories
instead.
Bug: 151078664
Test: atest StorageHostTest
atest com.android.tests.fused.host.FuseDaemonHostTest#testRenameAndReplaceFile
Change-Id: I38a057ec61cb627e39a3ff7ac58c7218dc251bdc
