From patchwork Tue Aug 10 02:38:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Kerr X-Patchwork-Id: 12427709 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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 15C7EC4338F for ; Tue, 10 Aug 2021 02:38:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E08FA61051 for ; Tue, 10 Aug 2021 02:38:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234582AbhHJCjO (ORCPT ); Mon, 9 Aug 2021 22:39:14 -0400 Received: from pi.codeconstruct.com.au ([203.29.241.158]:39938 "EHLO codeconstruct.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232599AbhHJCjN (ORCPT ); Mon, 9 Aug 2021 22:39:13 -0400 Received: by codeconstruct.com.au (Postfix, from userid 10000) id 56A5620135; Tue, 10 Aug 2021 10:38:51 +0800 (AWST) From: Jeremy Kerr To: netdev@vger.kernel.org Cc: Matt Johnston , "David S. Miller" , Jakub Kicinski Subject: [PATCH net-next v2] mctp: Specify route types, require rtm_type in RTM_*ROUTE messages Date: Tue, 10 Aug 2021 10:38:34 +0800 Message-Id: <20210810023834.2231088-1-jk@codeconstruct.com.au> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This change adds a 'type' attribute to routes, which can be parsed from a RTM_NEWROUTE message. This will help to distinguish local vs. peer routes in a future change. This means userspace will need to set a correct rtm_type in RTM_NEWROUTE and RTM_DELROUTE messages; we currently only accept RTN_UNICAST. Signed-off-by: Jeremy Kerr --- v2: - specify net-next as base branch --- include/net/mctp.h | 1 + net/mctp/route.c | 27 ++++++++++++++++++++++----- 2 files changed, 23 insertions(+), 5 deletions(-) diff --git a/include/net/mctp.h b/include/net/mctp.h index 54bbe042c973..a824d47c3c6d 100644 --- a/include/net/mctp.h +++ b/include/net/mctp.h @@ -173,6 +173,7 @@ struct mctp_route { struct mctp_dev *dev; unsigned int mtu; + unsigned char type; int (*output)(struct mctp_route *route, struct sk_buff *skb); diff --git a/net/mctp/route.c b/net/mctp/route.c index 960c85039eae..fc77337f4870 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -710,8 +710,9 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt, /* route management */ static int mctp_route_add(struct mctp_dev *mdev, mctp_eid_t daddr_start, unsigned int daddr_extent, unsigned int mtu, - bool is_local) + unsigned char type) { + int (*rtfn)(struct mctp_route *rt, struct sk_buff *skb); struct net *net = dev_net(mdev->dev); struct mctp_route *rt, *ert; @@ -721,6 +722,17 @@ static int mctp_route_add(struct mctp_dev *mdev, mctp_eid_t daddr_start, if (daddr_extent > 0xff || daddr_start + daddr_extent >= 255) return -EINVAL; + switch (type) { + case RTN_LOCAL: + rtfn = mctp_route_input; + break; + case RTN_UNICAST: + rtfn = mctp_route_output; + break; + default: + return -EINVAL; + } + rt = mctp_route_alloc(); if (!rt) return -ENOMEM; @@ -730,7 +742,8 @@ static int mctp_route_add(struct mctp_dev *mdev, mctp_eid_t daddr_start, rt->mtu = mtu; rt->dev = mdev; dev_hold(rt->dev->dev); - rt->output = is_local ? mctp_route_input : mctp_route_output; + rt->type = type; + rt->output = rtfn; ASSERT_RTNL(); /* Prevent duplicate identical routes. */ @@ -777,7 +790,7 @@ static int mctp_route_remove(struct mctp_dev *mdev, mctp_eid_t daddr_start, int mctp_route_add_local(struct mctp_dev *mdev, mctp_eid_t addr) { - return mctp_route_add(mdev, addr, 0, 0, true); + return mctp_route_add(mdev, addr, 0, 0, RTN_LOCAL); } int mctp_route_remove_local(struct mctp_dev *mdev, mctp_eid_t addr) @@ -939,7 +952,11 @@ static int mctp_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, /* TODO: parse mtu from nlparse */ mtu = 0; - rc = mctp_route_add(mdev, daddr_start, rtm->rtm_dst_len, mtu, false); + if (rtm->rtm_type != RTN_UNICAST) + return -EINVAL; + + rc = mctp_route_add(mdev, daddr_start, rtm->rtm_dst_len, mtu, + rtm->rtm_type); return rc; } @@ -988,7 +1005,7 @@ static int mctp_fill_rtinfo(struct sk_buff *skb, struct mctp_route *rt, hdr->rtm_table = RT_TABLE_DEFAULT; hdr->rtm_protocol = RTPROT_STATIC; /* everything is user-defined */ hdr->rtm_scope = RT_SCOPE_LINK; /* TODO: scope in mctp_route? */ - hdr->rtm_type = RTN_ANYCAST; /* TODO: type from route */ + hdr->rtm_type = rt->type; if (nla_put_u8(skb, RTA_DST, rt->min)) goto cancel;