From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F363C433FE for ; Thu, 3 Nov 2022 19:06:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230497AbiKCTGB (ORCPT ); Thu, 3 Nov 2022 15:06:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229771AbiKCTF5 (ORCPT ); Thu, 3 Nov 2022 15:05:57 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35A385FCB for ; Thu, 3 Nov 2022 12:05:56 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id g129so2476205pgc.7 for ; Thu, 03 Nov 2022 12:05:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=xTPyVtvwLQJHw9GIZEAspcuqMem8SnG9GJ/cx57p+QY=; b=NSiUbzUjU9/BG/mNkp6zWKE1oIVW4/YEy2Mq5C77lqgnE1na+uP1bu5KbKY7zz/Dlq h5FFfqVSHeay/uc3T9IG9KqLTzY4noe0Uiy53kDkglT1/H1pp0XqqXYuSUBSTDBJNFZ6 k3fz8aOOKEp2yyNwlE8XZJ5i4TbxL3EB99t3U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=xTPyVtvwLQJHw9GIZEAspcuqMem8SnG9GJ/cx57p+QY=; b=1o3OeoIIJqJXYTPbKLr+71EM8nn42/sLYRI3cMXcf2NXMQCVsLZB+8914caYodJgOr Ha1khwnXs68ibIC7PlxHsZWpKO5nbsN1kXcXAvsUTqUza5XfAVGcxa51GMn7W2/oEurs PHlmmpXbMXfiMmmleDkNN/5FyAwYPltGivj5E/UrPHrkJzNjA0d6QbZOVrkuXsLIuR8R B5MKNd2qKuZzFcE0uGtrf7qQTXln8Tg64pV4AOWcnzGU+fonWzP7u0QCxWHniCBM5aEn gv6CKuI/atAwJiAGfjSXO+gY9UYYNqEDqkRL/cInCRQ5Zr+0zV61M7fWwj3Bi2k7/NNM maXQ== X-Gm-Message-State: ACrzQf3IRQnldk1VSPNExTkaXaIInRe+gxVLbl8zbzvdPjjoc16+mIlW L1MoDW56f9fm0ypdNxGh/1IMPTkYO0ogFA== X-Google-Smtp-Source: AMsMyM7Ylop0fVj1dPQAh/0l7kc0yYBdAaiFk0ZRnROC2B2qyS8JfT69r5GIBsaZlnDFzG4SbUxRaQ== X-Received: by 2002:a63:1145:0:b0:46a:e00c:579c with SMTP id 5-20020a631145000000b0046ae00c579cmr27519259pgr.279.1667502355638; Thu, 03 Nov 2022 12:05:55 -0700 (PDT) Received: from li-cloudtop.c.googlers.com.com (30.161.125.34.bc.googleusercontent.com. [34.125.161.30]) by smtp.gmail.com with ESMTPSA id q13-20020a63d60d000000b0046ae5cfc3d5sm1070973pgg.61.2022.11.03.12.05.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Nov 2022 12:05:54 -0700 (PDT) From: Li Li To: dualli@google.com, gregkh@linuxfoundation.org, arve@android.com, tkjos@android.com, maco@android.com, joel@joelfernandes.org, brauner@kernel.org, cmllamas@google.com, surenb@google.com, arnd@arndb.de, masahiroy@kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, hridya@google.com, smoreland@google.com Cc: kernel-team@android.com Subject: [PATCH v1 0/1] binder: return pending info for frozen async txns Date: Thu, 3 Nov 2022 12:05:48 -0700 Message-Id: <20221103190549.3446167-1-dualli@chromium.org> X-Mailer: git-send-email 2.38.1.431.g37b22c650d-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Li Li 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(-) -- 2.38.1.431.g37b22c650d-goog