Where are hal_vehicle_client and hal_vehicle_server in hal_vehicle.te defined?

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icould icould

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Jun 10, 2020, 11:26:35 AM6/10/20
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I'm trying to understand how HAL is implemented and took hal_vehicle as an example.
in https://cs.android.com/android/platform/superproject/+/master:system/sepolicy/public/hal_vehicle.te;l=1?q=hal_vehicle.te&sq=

hal_vehicle_server and hal_vehicle_client are mentioned in the binder call. but where and who does introduce/define them, at what place and time?
I did a whole fulltext search but could not find a place where they are set.

I hope you can give me some advice.

thx

Wesolowski, Krzysztof

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Jun 10, 2020, 12:10:43 PM6/10/20
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Those names are "macro concatenated" in AOSP code *.te files. You can start with te_macros and hal_attribute.


BR, K.
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Subject: [android-building] Where are hal_vehicle_client and hal_vehicle_server in hal_vehicle.te defined?
 
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icould icould

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Jun 11, 2020, 11:06:26 AM6/11/20
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thank you for your answer. i'm very new into these sepolicy/selinux topics, so sry for following possibly dumb questions.

the background of my question is: following these tutorial https://devarea.com/android-hidl-and-project-treble/#.Xs49WRaxU5n I introduced an own hal interface. let's assume it is called xyz.
following the pattern of all other hal interfaces, every hal interface do have a .te file. like hal_vehicle.te, hal_power.te, ..

now i assume to get my xyz hal service running and recognized, i do have to add its own .te file.
i tried to copy paste the hal_vehicle.te content into hal_xyz.te (with: hal_xyz_server, hal_xyz_client), for hoping that would do it.
but while compile aosp, i get an error telling me it doesnt know hal_xyz_client and hal_xyz_server.

so, where do I start to let him know/introduce my own hal_xyz_client (label) and hal_xyz_server.

again, sry if my assumptions are dumb. I don't have any direction yet, to understand it.

thx


On Wednesday, June 10, 2020 at 6:10:43 PM UTC+2, Wesolowski, Krzysztof wrote:
Those names are "macro concatenated" in AOSP code *.te files. You can start with te_macros and hal_attribute.


BR, K.
From: android-...@googlegroups.com <android-...@googlegroups.com> on behalf of icould icould <icou...@gmail.com>
Sent: Wednesday, June 10, 2020 14:35
To: Android Building <android-...@googlegroups.com>
Subject: [android-building] Where are hal_vehicle_client and hal_vehicle_server in hal_vehicle.te defined?
 
I'm trying to understand how HAL is implemented and took hal_vehicle as an example.
in https://cs.android.com/android/platform/superproject/+/master:system/sepolicy/public/hal_vehicle.te;l=1?q=hal_vehicle.te&sq=

hal_vehicle_server and hal_vehicle_client are mentioned in the binder call. but where and who does introduce/define them, at what place and time?
I did a whole fulltext search but could not find a place where they are set.

I hope you can give me some advice.

thx

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