mbox series

[v1,0/1] binder: return pending info for frozen async txns

Message ID 20221103190549.3446167-1-dualli@chromium.org
Headers
Series binder: return pending info for frozen async txns |

Message

Li Li Nov. 3, 2022, 7:05 p.m. UTC 
  From: Li Li <dualli@google.com>

User applications need to know if their binder transactions reach a
frozen process or not. For sync binder calls, Linux kernel already
has a dedicated return value BR_FROZEN_REPLY, indicating this sync
binder transaction will be rejected (similar to BR_DEAD_REPLY) as the
target process is frozen. But for async binder calls, the user space
application doesn't have a way to know if the target process is frozen.

This patch add a new return value, BR_TRANSACTION_PENDING, to fix this
issue. Similar to BR_TRANSACTION_COMPLETE, it means the async binder
transaction has been put in the queue of the target process, but it's
waiting for the target process to be unfrozen.

v1: checkpatch.pl --strict passed

Li Li (1):
  binder: return pending info for frozen async txns

 drivers/android/binder.c            | 23 ++++++++++++++++++++---
 drivers/android/binder_internal.h   |  3 ++-
 include/uapi/linux/android/binder.h |  7 ++++++-
 3 files changed, 28 insertions(+), 5 deletions(-)