From patchwork Thu Jan 28 12:49:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petr Machata X-Patchwork-Id: 373120 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 7314BC433DB for ; Thu, 28 Jan 2021 12:52:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F81C64DE4 for ; Thu, 28 Jan 2021 12:52:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231858AbhA1Mwt (ORCPT ); Thu, 28 Jan 2021 07:52:49 -0500 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:4126 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231779AbhA1MvW (ORCPT ); Thu, 28 Jan 2021 07:51:22 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Thu, 28 Jan 2021 04:50:41 -0800 Received: from localhost.localdomain (172.20.145.6) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 28 Jan 2021 12:50:39 +0000 From: Petr Machata To: CC: David Ahern , "David S. Miller" , Jakub Kicinski , Ido Schimmel , "Petr Machata" Subject: [PATCH net-next 10/12] nexthop: Extract a helper for walking the next-hop tree Date: Thu, 28 Jan 2021 13:49:22 +0100 Message-ID: <2537ad1b469601766024e2eb66c135ee2e82e8d0.1611836479.git.petrm@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [172.20.145.6] X-ClientProxiedBy: HQMAIL111.nvidia.com (172.20.187.18) To HQMAIL111.nvidia.com (172.20.187.18) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1611838242; bh=hVBSeUUH/0E70ID0YkRhLTSPOsjMsO3zoElGixA3Coo=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:Content-Type: X-Originating-IP:X-ClientProxiedBy; b=sNh3FSSPrvIihl3ZuPP/BIAt2FGqrEWHdhmzjkSSzTJZs1Vr/Ehdk25KLe5TmaG4q 9+euKh1eQvZAyX0cUqnzhfOHoqV+0JFxhcSYA1+takOKRatVRS1FEnfRTPXhQLXumy gaX2RAZ/ButBsVcxTzzDNQySqQExcZQcCg3jWHZYDqAw/F1o5vYpkUgXD8//SRxQx8 NDhStHJFfAV3zfkHPVmbUcToszkRZG2EOLV52hQJv+s16/QbPwb8NP56jSTb4YfUkA d6QPWv1bjLOVYmIfvDq6HZ7Ptmw+9Slz6hiqINV6Byb44yRXfEWC0l+GXFOrziMvHs tG+fpPjWGVtOQ== Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Extract from rtm_dump_nexthop() a helper to walk the next hop tree. A separate function for this will be reusable from the bucket dumper. Signed-off-by: Petr Machata Reviewed-by: Ido Schimmel Reviewed-by: David Ahern --- net/ipv4/nexthop.c | 52 +++++++++++++++++++++++++++++----------------- 1 file changed, 33 insertions(+), 19 deletions(-) diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 7ae197efa5a9..e5175f531ffb 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -2079,22 +2079,17 @@ rtm_dump_nh_ctx(struct netlink_callback *cb) return ctx; } -/* rtnl */ -static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb) +static int rtm_dump_walk_nexthops(struct sk_buff *skb, + struct netlink_callback *cb, + struct rb_root *root, + struct rtm_dump_nh_ctx *ctx, + struct nh_dump_filter *filter) { - struct rtm_dump_nh_ctx *ctx = rtm_dump_nh_ctx(cb); struct nhmsg *nhm = nlmsg_data(cb->nlh); - struct net *net = sock_net(skb->sk); - struct rb_root *root = &net->nexthop.rb_root; - struct nh_dump_filter filter = {}; struct rb_node *node; int idx = 0, s_idx; int err; - err = nh_valid_dump_req(cb->nlh, &filter, cb); - if (err < 0) - return err; - s_idx = ctx->idx; for (node = rb_first(root); node; node = rb_next(node)) { struct nexthop *nh; @@ -2103,29 +2098,48 @@ static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb) goto cont; nh = rb_entry(node, struct nexthop, rb_node); - if (nh_dump_filtered(nh, &filter, nhm->nh_family)) + if (nh_dump_filtered(nh, filter, nhm->nh_family)) goto cont; + ctx->idx = idx; err = nh_fill_node(skb, nh, RTM_NEWNEXTHOP, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI); - if (err < 0) { - if (likely(skb->len)) - goto out; - - goto out_err; - } + if (err < 0) + return err; cont: idx++; } + ctx->idx = idx; + return 0; +} + +/* rtnl */ +static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct rtm_dump_nh_ctx *ctx = rtm_dump_nh_ctx(cb); + struct net *net = sock_net(skb->sk); + struct rb_root *root = &net->nexthop.rb_root; + struct nh_dump_filter filter = {}; + int err; + + err = nh_valid_dump_req(cb->nlh, &filter, cb); + if (err < 0) + return err; + + err = rtm_dump_walk_nexthops(skb, cb, root, ctx, &filter); + if (err < 0) { + if (likely(skb->len)) + goto out; + goto out_err; + } + out: err = skb->len; out_err: - ctx->idx = idx; cb->seq = net->nexthop.seq; nl_dump_check_consistent(cb, nlmsg_hdr(skb)); - return err; }