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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 43EB1C3A59F for ; Mon, 26 Aug 2019 13:45:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 262B2206B7 for ; Mon, 26 Aug 2019 13:45:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732123AbfHZNp1 (ORCPT ); Mon, 26 Aug 2019 09:45:27 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:52965 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732050AbfHZNpZ (ORCPT ); Mon, 26 Aug 2019 09:45:25 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vladbu@mellanox.com) with ESMTPS (AES256-SHA encrypted); 26 Aug 2019 16:45:15 +0300 Received: from reg-r-vrt-018-180.mtr.labs.mlnx. (reg-r-vrt-018-180.mtr.labs.mlnx [10.215.1.1]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id x7QDjEFW000366; Mon, 26 Aug 2019 16:45:15 +0300 From: Vlad Buslov To: netdev@vger.kernel.org Cc: jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, davem@davemloft.net, jakub.kicinski@netronome.com, pablo@netfilter.org, Vlad Buslov , Jiri Pirko Subject: [PATCH net-next v3 08/10] net: sched: take reference to action dev before calling offloads Date: Mon, 26 Aug 2019 16:45:04 +0300 Message-Id: <20190826134506.9705-9-vladbu@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190826134506.9705-1-vladbu@mellanox.com> References: <20190826134506.9705-1-vladbu@mellanox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org In order to remove dependency on rtnl lock when calling hardware offload API, take reference to action mirred dev when initializing flow_action structure in tc_setup_flow_action(). Implement function tc_cleanup_flow_action(), use it to release the device after hardware offload API is done using it. Signed-off-by: Vlad Buslov Acked-by: Jiri Pirko --- include/net/pkt_cls.h | 2 ++ net/sched/cls_api.c | 32 ++++++++++++++++++++++++++++++++ net/sched/cls_flower.c | 2 ++ 3 files changed, 36 insertions(+) diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h index a48824bc1489..e553fc80eb23 100644 --- a/include/net/pkt_cls.h +++ b/include/net/pkt_cls.h @@ -505,6 +505,8 @@ tcf_match_indev(struct sk_buff *skb, int ifindex) int tc_setup_flow_action(struct flow_action *flow_action, const struct tcf_exts *exts, bool rtnl_held); +void tc_cleanup_flow_action(struct flow_action *flow_action); + int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, void *type_data, bool err_stop, bool rtnl_held); int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 8751bb8a682f..d988737693e4 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -3265,6 +3265,27 @@ int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, } EXPORT_SYMBOL(tc_setup_cb_reoffload); +void tc_cleanup_flow_action(struct flow_action *flow_action) +{ + struct flow_action_entry *entry; + int i; + + flow_action_for_each(i, entry, flow_action) { + switch (entry->id) { + case FLOW_ACTION_REDIRECT: + case FLOW_ACTION_MIRRED: + case FLOW_ACTION_REDIRECT_INGRESS: + case FLOW_ACTION_MIRRED_INGRESS: + if (entry->dev) + dev_put(entry->dev); + break; + default: + break; + } + } +} +EXPORT_SYMBOL(tc_cleanup_flow_action); + int tc_setup_flow_action(struct flow_action *flow_action, const struct tcf_exts *exts, bool rtnl_held) { @@ -3294,15 +3315,23 @@ int tc_setup_flow_action(struct flow_action *flow_action, } else if (is_tcf_mirred_egress_redirect(act)) { entry->id = FLOW_ACTION_REDIRECT; entry->dev = tcf_mirred_dev(act); + if (entry->dev) + dev_hold(entry->dev); } else if (is_tcf_mirred_egress_mirror(act)) { entry->id = FLOW_ACTION_MIRRED; entry->dev = tcf_mirred_dev(act); + if (entry->dev) + dev_hold(entry->dev); } else if (is_tcf_mirred_ingress_redirect(act)) { entry->id = FLOW_ACTION_REDIRECT_INGRESS; entry->dev = tcf_mirred_dev(act); + if (entry->dev) + dev_hold(entry->dev); } else if (is_tcf_mirred_ingress_mirror(act)) { entry->id = FLOW_ACTION_MIRRED_INGRESS; entry->dev = tcf_mirred_dev(act); + if (entry->dev) + dev_hold(entry->dev); } else if (is_tcf_vlan(act)) { switch (tcf_vlan_action(act)) { case TCA_VLAN_ACT_PUSH: @@ -3410,6 +3439,9 @@ int tc_setup_flow_action(struct flow_action *flow_action, if (!rtnl_held) rtnl_unlock(); + if (err) + tc_cleanup_flow_action(flow_action); + return err; } EXPORT_SYMBOL(tc_setup_flow_action); diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index fb305bd45d93..2852fe6f50d2 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -465,6 +465,7 @@ static int fl_hw_replace_filter(struct tcf_proto *tp, err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw, &f->flags, &f->in_hw_count, true); + tc_cleanup_flow_action(&cls_flower.rule->action); kfree(cls_flower.rule); if (err) { @@ -1838,6 +1839,7 @@ static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, TC_SETUP_CLSFLOWER, &cls_flower, cb_priv, &f->flags, &f->in_hw_count); + tc_cleanup_flow_action(&cls_flower.rule->action); kfree(cls_flower.rule); if (err) { -- 2.21.0