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Commit 0fabba39 authored by Philip Cuadra's avatar Philip Cuadra
Browse files

Allow Bluetooth CAP_SYS_NICE 

Bluetooth needs CAP_SYS_NICE in order to make important threads use RT
scheduling policy.

Bug 37518404

Test: Play Bluetooth audio, confirm RT priority in systrace
Change-Id: I388ef78d1aaf3f5fe1aa901b48d76c5c992acacc
Merged-In: I0ee55a2f2cfd80cbb066d9c034bb85d8d85ba470
parent 41f48e3f

core/jni/com_android_internal_os_Zygote.cpp

+3 −0
Original line number Diff line number Diff line
@@ -685,11 +685,14 @@ static jint com_android_internal_os_Zygote_nativeForkAndSpecialize( 


    // Grant CAP_WAKE_ALARM to the Bluetooth process.

    // Additionally, allow bluetooth to open packet sockets so it can start the DHCP client.

    // Grant CAP_SYS_NICE to allow Bluetooth to set RT priority for

    // audio-related threads.

    // TODO: consider making such functionality an RPC to netd.

    if (multiuser_get_app_id(uid) == AID_BLUETOOTH) {

      capabilities |= (1LL << CAP_WAKE_ALARM);

      capabilities |= (1LL << CAP_NET_RAW);

      capabilities |= (1LL << CAP_NET_BIND_SERVICE);

      capabilities |= (1LL << CAP_SYS_NICE);

    }



    // Grant CAP_BLOCK_SUSPEND to processes that belong to GID "wakelock"