From patchwork Fri Mar 31 07:48:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sricharan Ramabadhran X-Patchwork-Id: 13195370 X-Patchwork-Delegate: kuba@kernel.org 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 2261DC6FD18 for ; Fri, 31 Mar 2023 07:51:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231349AbjCaHvb (ORCPT ); Fri, 31 Mar 2023 03:51:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231209AbjCaHvE (ORCPT ); Fri, 31 Mar 2023 03:51:04 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75B161C1C2; Fri, 31 Mar 2023 00:49:58 -0700 (PDT) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32V71JNS020803; Fri, 31 Mar 2023 07:49:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : subject : date : message-id : mime-version : content-type; s=qcppdkim1; bh=13eN19ykrC1NIz/k/gipi1BTZEQj9+AphjGs7LxAaK0=; b=HAc8Hj7AR1xgWhl31TTg9wY5vUBHmMPG8MC4uPOhyAIbjR+ydTbn6741xRuCefzTmlO1 HnmdI/k6KzvFcd/i8oNlofU0hqXWv31efWMMa5JmqKZ2M4fuSgiG6T4tn/bKNYTov096 pVwZuiZOw+f6Ub88unt9u3mGJxuLru1IiVSFd8/OzFpk1xMcNYoservp6PpL70Bxy6Io SHIIKaOvzpF4dvJVaoHcSrpA2OynX+xIKOojLVl+x4KfmNuZSUozO/j1LmBggQEkmQTV a5Cs39gr+xUUj6XawR77rrcm9WiE9jULmsfcEBIZhX+h0MjkqXTmpc4kdewKgkFcT8Mq hQ== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3pn9kgttcb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 Mar 2023 07:49:43 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 32V7ngBA028620 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 Mar 2023 07:49:43 GMT Received: from srichara-linux.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Fri, 31 Mar 2023 00:49:08 -0700 From: Sricharan Ramabadhran To: , , , , , , , , Subject: [PATCH V2] net: qrtr: Do not do DEL_SERVER broadcast after DEL_CLIENT Date: Fri, 31 Mar 2023 13:18:57 +0530 Message-ID: <1680248937-16617-1-git-send-email-quic_srichara@quicinc.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: EWu-S4bW2rpNZjEA_VPm3ZwHLApJQrLk X-Proofpoint-ORIG-GUID: EWu-S4bW2rpNZjEA_VPm3ZwHLApJQrLk X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-31_03,2023-03-30_04,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 adultscore=0 malwarescore=0 suspectscore=0 bulkscore=0 spamscore=0 clxscore=1015 mlxlogscore=843 lowpriorityscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2303310063 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org On the remote side, when QRTR socket is removed, af_qrtr will call qrtr_port_remove() which broadcasts the DEL_CLIENT packet to all neighbours including local NS. NS upon receiving the DEL_CLIENT packet, will remove the lookups associated with the node:port and broadcasts the DEL_SERVER packet. But on the host side, due to the arrival of the DEL_CLIENT packet, the NS would've already deleted the server belonging to that port. So when the remote's NS again broadcasts the DEL_SERVER for that port, it throws below error message on the host: "failed while handling packet from 2:-2" So fix this error by not broadcasting the DEL_SERVER packet when the DEL_CLIENT packet gets processed." Fixes: 0c2204a4ad71 ("net: qrtr: Migrate nameservice to kernel from userspace") Signed-off-by: Sricharan Ramabadhran Signed-off-by: Ram Kumar Dharuman Reviewed-by: Manivannan Sadhasivam --- [v2] Fixed comments from Manivannan and Jakub Kicinski Note: Functionally tested on 5.4 and compile tested on 6.3 TOT net/qrtr/ns.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/net/qrtr/ns.c b/net/qrtr/ns.c index 722936f..0f25a38 100644 --- a/net/qrtr/ns.c +++ b/net/qrtr/ns.c @@ -274,7 +274,7 @@ static struct qrtr_server *server_add(unsigned int service, return NULL; } -static int server_del(struct qrtr_node *node, unsigned int port) +static int server_del(struct qrtr_node *node, unsigned int port, bool bcast) { struct qrtr_lookup *lookup; struct qrtr_server *srv; @@ -287,7 +287,7 @@ static int server_del(struct qrtr_node *node, unsigned int port) radix_tree_delete(&node->servers, port); /* Broadcast the removal of local servers */ - if (srv->node == qrtr_ns.local_node) + if (srv->node == qrtr_ns.local_node && bcast) service_announce_del(&qrtr_ns.bcast_sq, srv); /* Announce the service's disappearance to observers */ @@ -373,7 +373,7 @@ static int ctrl_cmd_bye(struct sockaddr_qrtr *from) } slot = radix_tree_iter_resume(slot, &iter); rcu_read_unlock(); - server_del(node, srv->port); + server_del(node, srv->port, true); rcu_read_lock(); } rcu_read_unlock(); @@ -459,10 +459,13 @@ static int ctrl_cmd_del_client(struct sockaddr_qrtr *from, kfree(lookup); } - /* Remove the server belonging to this port */ + /* Remove the server belonging to this port but don't broadcast + * DEL_SERVER. Neighbours would've already removed the server belonging + * to this port due to the DEL_CLIENT broadcast from qrtr_port_remove(). + */ node = node_get(node_id); if (node) - server_del(node, port); + server_del(node, port, false); /* Advertise the removal of this client to all local servers */ local_node = node_get(qrtr_ns.local_node); @@ -567,7 +570,7 @@ static int ctrl_cmd_del_server(struct sockaddr_qrtr *from, if (!node) return -ENOENT; - return server_del(node, port); + return server_del(node, port, true); } static int ctrl_cmd_new_lookup(struct sockaddr_qrtr *from,