commit | 58dc3ce7bb7096b9371a17bfba39e306b646e521 | [log] [tgz] |
---|---|---|
author | Tim Zimmermann <tim@linux4.de> | Sun Mar 24 17:23:43 2024 +0100 |
committer | Tim Zimmermann <tim@linux4.de> | Sun Mar 24 17:24:23 2024 +0100 |
tree | 04e81ff01294d429fb69fc9b45cf09b2460300b9 | |
parent | d5eaa8d15d4fd1078a99d49e717463286fa40d88 [diff] |
fixup! recovery: Add the option to choose the filesystem for /data Change-Id: Ife8367fddb386c281214c0fb94babfba36619f7f
Devices using recovery-as-boot (e.g. Pixels, which set BOARD_USES_RECOVERY_AS_BOOT)
# After setting up environment and lunch. m -j bootimage adb reboot bootloader # Pixel devices don't support booting into recovery mode with `fastboot boot`. fastboot flash boot # Manually choose `Recovery mode` from bootloader menu.
Devices with a separate recovery image (e.g. Nexus)
# After setting up environment and lunch. mm -j && m ramdisk-nodeps && m recoveryimage-nodeps adb reboot bootloader # To boot into the new recovery image without flashing the recovery partition: fastboot boot $ANDROID_PRODUCT_OUT/recovery.img
# After setting up environment and lunch. mmma -j bootable/recovery # Running the tests on device (under normal boot). adb root adb sync data # 32-bit device adb shell /data/nativetest/recovery_unit_test/recovery_unit_test # Or 64-bit device adb shell /data/nativetest64/recovery_unit_test/recovery_unit_test
recovery-refresh
and recovery-persist
executables exist only on systems without /cache partition. And we need to follow special steps to run tests for them.
Execute the test on an A/B device first. The test should fail but it will log some contents to pmsg.
Reboot the device immediately and run the test again. The test should save the contents of pmsg buffer into /data/misc/recovery/inject.txt. Test will pass if this file has expected contents.
adb
under recoveryWhen running recovery image from debuggable builds (i.e. -eng
or -userdebug
build variants, or ro.debuggable=1
in /prop.default
), adbd
service is enabled and started by default, which allows adb
communication. A device should be listed under adb devices
, either in recovery
or sideload
state.
$ adb devices List of devices attached 1234567890abcdef recovery
Although /system/bin/adbd
is built from the same code base as the one in the normal boot, only a subset of adb
commands are meaningful under recovery, such as adb root
, adb shell
, adb push
, adb pull
etc. Since Android Q, adb shell
no longer requires manually mounting /system
from recovery menu.
adb devices
doesn't show the device.$ adb devices List of devices attached
adbd
is built and running.By default, adbd
is always included into recovery image, as /system/bin/adbd
. init
starts adbd
service automatically only in debuggable builds. This behavior is controlled by the recovery specific /init.rc
, whose source code is at bootable/recovery/etc/init.rc
.
The best way to confirm a running adbd
is by checking the serial output, which shows a service start log as below.
[ 18.961986] c1 1 init: starting service 'adbd'...
If adbd
service has been started but device not shown under adb devices
, use lsusb(8)
(on host) to check if the device is visible to the host.
bootable/recovery/etc/init.rc
disables Android USB gadget (via sysfs) as part of the fs
action trigger, and will only re-enable it in debuggable builds (the on property
rule will always run after on fs
).
on fs write /sys/class/android_usb/android0/enable 0 # Always start adbd on userdebug and eng builds on property:ro.debuggable=1 write /sys/class/android_usb/android0/enable 1 start adbd
If device is using configfs, check if configfs has been properly set up in init rc scripts. See the example configuration for Pixel 2 devices. Note that the flag set via sysfs (i.e. the one above) is no-op when using configfs.
adb devices
shows the device, but in unauthorized
state.$ adb devices List of devices attached 1234567890abcdef unauthorized
recovery image doesn't honor the USB debugging toggle and the authorizations added under normal boot (because such authorization data stays in /data, which recovery doesn't mount), nor does it support authorizing a host device under recovery. We can use one of the following options instead.
For debuggable builds, an RSA keypair can be used to authorize a host device that has the private key. The public key, defined via PRODUCT_ADB_KEYS
, will be copied to /adb_keys
. When starting the host-side adbd
, make sure the filename (or the directory) of the matching private key has been added to $ADB_VENDOR_KEYS
.
$ export ADB_VENDOR_KEYS=/path/to/adb/private/key $ adb kill-server $ adb devices
-user
builds filter out PRODUCT_ADB_KEYS
, so no /adb_keys
will be included there.
Note that this mechanism applies to both of normal boot and recovery modes.
adbd
to connect without authentication.ro.boot.verifiedbootstate
is orange
) or debuggable build.ro.adb.secure
has a value of 0
.Both of the two conditions need to be satisfied. Although ro.adb.secure
is a runtime property, its value is set at build time (written into /prop.default
). It defaults to 1
on -user
builds, and 0
for other build variants. The value is overridable via PRODUCT_DEFAULT_PROPERTY_OVERRIDES
.
The recovery image supports localization of several background texts, e.g. installing, error, factory reset warnings, etc. For devices using xxhdpi
and xxxhdpi
, the build system generates these localization images dynamically since android-10 when building the recovery image. While the static images under res-*dpi/images/ is used for other display resolutions and as a backup.
Check the invocation of the image_generator tool in the makefile. And the detailed usage of the image_generator is documented here.