From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:34522 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1030552AbeCAMv4 (ORCPT ); Thu, 1 Mar 2018 07:51:56 -0500 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w21CnEBo005718 for ; Thu, 1 Mar 2018 07:51:55 -0500 Received: from e06smtp11.uk.ibm.com (e06smtp11.uk.ibm.com [195.75.94.107]) by mx0b-001b2d01.pphosted.com with ESMTP id 2gefr8dn69-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 01 Mar 2018 07:51:55 -0500 Received: from localhost by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 1 Mar 2018 12:51:53 -0000 From: Ursula Braun To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, raspl@linux.vnet.ibm.com, ubraun@linux.vnet.ibm.com Subject: [PATCH net-next 8/8] net/smc: prevent new connections on link group Date: Thu, 1 Mar 2018 13:51:33 +0100 In-Reply-To: <20180301125133.12211-1-ubraun@linux.vnet.ibm.com> References: <20180301125133.12211-1-ubraun@linux.vnet.ibm.com> Message-Id: <20180301125133.12211-9-ubraun@linux.vnet.ibm.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Karsten Graul When the processing of a DELETE LINK message has started, new connections should not be added to the link group that is about to terminate. Signed-off-by: Karsten Graul Signed-off-by: Ursula Braun --- net/smc/af_smc.c | 9 --------- net/smc/smc_core.c | 19 ++++++++++--------- net/smc/smc_core.h | 1 + net/smc/smc_llc.c | 1 + 4 files changed, 12 insertions(+), 18 deletions(-) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 5267ed19b67d..26684e086750 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -356,15 +356,6 @@ static void smc_link_save_peer_info(struct smc_link *link, link->peer_mtu = clc->qp_mtu; } -static void smc_lgr_forget(struct smc_link_group *lgr) -{ - spin_lock_bh(&smc_lgr_list.lock); - /* do not use this link group for new connections */ - if (!list_empty(&lgr->list)) - list_del_init(&lgr->list); - spin_unlock_bh(&smc_lgr_list.lock); -} - /* setup for RDMA connection of client */ static int smc_connect_rdma(struct smc_sock *smc) { diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index eb343e15a723..702ce5f85e97 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -308,6 +308,15 @@ void smc_lgr_free(struct smc_link_group *lgr) kfree(lgr); } +void smc_lgr_forget(struct smc_link_group *lgr) +{ + spin_lock_bh(&smc_lgr_list.lock); + /* do not use this link group for new connections */ + if (!list_empty(&lgr->list)) + list_del_init(&lgr->list); + spin_unlock_bh(&smc_lgr_list.lock); +} + /* terminate linkgroup abnormally */ void smc_lgr_terminate(struct smc_link_group *lgr) { @@ -315,15 +324,7 @@ void smc_lgr_terminate(struct smc_link_group *lgr) struct smc_sock *smc; struct rb_node *node; - spin_lock_bh(&smc_lgr_list.lock); - if (list_empty(&lgr->list)) { - /* termination already triggered */ - spin_unlock_bh(&smc_lgr_list.lock); - return; - } - /* do not use this link group for new connections */ - list_del_init(&lgr->list); - spin_unlock_bh(&smc_lgr_list.lock); + smc_lgr_forget(lgr); write_lock_bh(&lgr->conns_lock); node = rb_first(&lgr->conns_all); diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index cead2093c4b4..07e2a393e6d9 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -197,6 +197,7 @@ struct smc_sock; struct smc_clc_msg_accept_confirm; void smc_lgr_free(struct smc_link_group *lgr); +void smc_lgr_forget(struct smc_link_group *lgr); void smc_lgr_terminate(struct smc_link_group *lgr); int smc_buf_create(struct smc_sock *smc); int smc_rmb_rtoken_handling(struct smc_connection *conn, diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index 45b3e0211c39..54e8d6dc9201 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -384,6 +384,7 @@ static void smc_llc_rx_delete_link(struct smc_link *link, smc_lgr_terminate(lgr); } else { if (lgr->role == SMC_SERV) { + smc_lgr_forget(lgr); smc_llc_send_delete_link(link, SMC_LLC_REQ); } else { smc_llc_send_delete_link(link, SMC_LLC_RESP); -- 2.13.5