1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
The Recovery Image
==================
Quick turn-around testing
-------------------------
mm -j && m ramdisk-nodeps && m recoveryimage-nodeps
# To boot into the new recovery image
# without flashing the recovery partition:
adb reboot bootloader
fastboot boot $ANDROID_PRODUCT_OUT/recovery.img
Running the tests
-----------------
# After setting up environment and lunch.
mmma -j bootable/recovery
# Running the tests on device.
adb root
adb sync data
# 32-bit device
adb shell /data/nativetest/recovery_unit_test/recovery_unit_test
adb shell /data/nativetest/recovery_component_test/recovery_component_test
# Or 64-bit device
adb shell /data/nativetest64/recovery_unit_test/recovery_unit_test
adb shell /data/nativetest64/recovery_component_test/recovery_component_test
Running the manual tests
------------------------
`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.
`ResourceTest` validates whether the png files are qualified as background text
image under recovery.
1. `adb sync data` to make sure the test-dir has the images to test.
2. The test will automatically pickup and verify all `_text.png` files in
the test dir.
Using `adb` under recovery
--------------------------
When 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 `/sbin/adbd` shares the same binary between normal boot and recovery images, only a subset
of `adb` commands are meaningful under recovery, such as `adb root`, `adb shell`, `adb push`, `adb
pull` etc. `adb shell` works only after manually mounting `/system` from recovery menu (assuming a
valid system image on device).
## Troubleshooting
### `adb devices` doesn't show the device.
$ adb devices
List of devices attached
* Ensure `adbd` is built and running.
By default, `adbd` is always included into recovery image, as `/sbin/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'...
* Ensure USB gadget has been enabled.
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](https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt),
check if configfs has been properly set up in init rc scripts. See the [example
configuration](https://android.googlesource.com/device/google/wahoo/+/master/init.recovery.hardware.rc)
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.
* **Option 1 (Recommended):** Authorize a host device with adb vendor keys.
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.
* **Option 2:** Allow `adbd` to connect without authentication.
* `adbd` is compiled with `ALLOW_ADBD_NO_AUTH` (only on debuggable builds).
* `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`.
|
