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binder: return pending info for frozen async txns

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An async transaction to a frozen process will still be successfully
put in the queue. But this pending async transaction won't be processed
until the target process is unfrozen at an unspecified time in the
future. Pass this important information back to the user space caller
by returning BR_TRANSACTION_PENDING_FROZEN.

Signed-off-by: Li Li <dualli@google.com>
Acked-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20221123201654.589322-2-dualli@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Li 2022-11-23 12:16:54 -08:00 • committed by Greg Kroah-Hartman
parent 7feb35bc16
commit 0567461a7a
3 changed files with 34 additions and 8 deletions
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7
include/uapi/linux/android/binder.h
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@ -450,7 +450,7 @@ enum binder_driver_return_protocol {
BR_FROZEN_REPLY = _IO('r', 18),
/*
* The target of the last transaction (either a bcTRANSACTION or
* The target of the last sync transaction (either a bcTRANSACTION or
* a bcATTEMPT_ACQUIRE) is frozen. No parameters.
*/
@ -460,6 +460,11 @@ enum binder_driver_return_protocol {
* asynchronous transaction makes the allocated async buffer size exceed
* detection threshold. No parameters.
*/
BR_TRANSACTION_PENDING_FROZEN = _IO('r', 20),
/*
* The target of the last async transaction is frozen. No parameters.
*/
};
enum binder_driver_command_protocol {