From patchwork Thu Oct 8 20:03:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shoaib Rao X-Patchwork-Id: 11824507 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8CA19C433E7 for ; Thu, 8 Oct 2020 20:17:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C66D22227 for ; Thu, 8 Oct 2020 20:17:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="d6dKbQ71" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730117AbgJHURN (ORCPT ); Thu, 8 Oct 2020 16:17:13 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:33476 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730096AbgJHURN (ORCPT ); Thu, 8 Oct 2020 16:17:13 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 098KFi99019273 for ; Thu, 8 Oct 2020 20:17:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2020-01-29; bh=YzCW17HvF28kHl210+6Yn/DL47BhC9bM5ymnBPKfbPM=; b=d6dKbQ71XLQVN39DTvJshXgmxCL8krPZSwWkNBUmzI9LOBoCUcqk/YJ/DoRzXAXIjkrb q+++Wl7UID4nqcOjTNWv+XDGrbqRuyBCPIocn+vammGu9kd4UUSMWIoRooh5PnD9fPxQ dNeQf1cmc9d4/g2AijBmxRmENtIrQjDVTMlG4oiCAL92zp3uZxkyPcAw46zRBTpIcraD bTJrOaSCihti6m14CQXBfRK3HK0o8BPLpVwkL81FBGGpfnOMNILLMtpA4DyJwo7y1deX UgVPO/kABOpg1tPDStlfwags/XrvMsi8rpqy4lGoQir+2DeCj8gXj0NvYAm+7BYVf2t5 jw== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by userp2120.oracle.com with ESMTP id 3429jmg17j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Thu, 08 Oct 2020 20:17:12 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 098KC2YB044334 for ; Thu, 8 Oct 2020 20:15:11 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3030.oracle.com with ESMTP id 3429kk02hn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Thu, 08 Oct 2020 20:15:11 +0000 Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 098KFAnD030876 for ; Thu, 8 Oct 2020 20:15:10 GMT Received: from oracle.com (/10.129.135.37) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 08 Oct 2020 13:15:10 -0700 From: rao.shoaib@oracle.com To: netdev@vger.kernel.org Cc: Rao Shoaib Subject: [RFC net-next af_unix v1 0/1] Allow delivery of SIGURG on AF_UNIX streams socket Date: Thu, 8 Oct 2020 13:03:57 -0700 Message-Id: <1602187438-12464-1-git-send-email-rao.shoaib@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9768 signatures=668681 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 mlxlogscore=999 spamscore=0 adultscore=0 mlxscore=0 malwarescore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010080141 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9768 signatures=668681 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 spamscore=0 suspectscore=1 clxscore=1015 phishscore=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 priorityscore=1501 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010080142 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: netdev From: Rao Shoaib The use of AF_UNIX sockets is on the rise. We have a case where thousands of processes connect locally to a database and issue queries that are serviced by a pool of threads. Communication is done over AF_UNIX sockets. Currently, there is no way for the submitter to signal the servicing thread about an urgent condition such as abandoning the query. This patch addresses that requirement by adding support for MSG_OOB flag for AF_UNIX sockets. On receipt of such a flag, the kernel sends a SIGURG to the peer. Rao Shoaib (1): af_unix: Allow delivery of SIGURG on AF_UNIX streams socket net/unix/af_unix.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)