From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.netfilter.org (mail.netfilter.org [217.70.190.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B37BE3446CC; Wed, 26 Nov 2025 20:56:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.190.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764190591; cv=none; b=thejFaLyYub37Vc3n2IUzCLZ4TUv3NQLwOzhJG8JIK8ycAbOSyinrDkXUo1hf/qy32R8bN1ygnbx/lWdCDVLj0RsP6OihzJvwJGyfJc6bndYbh42q8MCYpBvu+Zr5R39F8V8mhjiE3t4VJ7sbbkQEp0GLDUNtD1jVoHnCGOvUJY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764190591; c=relaxed/simple; bh=/XVYGizZcqYyyyNVwTp6ok3l73Hw2vEFagWoFSMANZQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Uy+D1bJf1KyIr87YMR+C5Ww44CdxvgrRVB1X4MOuqb6s/9xSyFvGlPL1URcjB8NfFT14lmFqeomrEkeQi/5ladKfBOPdxN9gkJP0ut8Il/zH3xDeXZlN4xaOs+wSX0U0/lCJ6h34sjRVgTN41PoShZgilcSe6BUxrgDZ+B22CrU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=netfilter.org; spf=pass smtp.mailfrom=netfilter.org; dkim=pass (2048-bit key) header.d=netfilter.org header.i=@netfilter.org header.b=lkvuaiZX; arc=none smtp.client-ip=217.70.190.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=netfilter.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=netfilter.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=netfilter.org header.i=@netfilter.org header.b="lkvuaiZX" Received: from localhost.localdomain (mail-agni [217.70.190.124]) by mail.netfilter.org (Postfix) with ESMTPSA id 4C68E60276; Wed, 26 Nov 2025 21:56:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netfilter.org; s=2025; t=1764190587; bh=84TTsxGk2nyN0iv48tSJGXNgPxKrWmE9Jmkl2573eTM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lkvuaiZXaaWs7pm0LvzuK20vpY8PH6WrdWmag3OcyzOQTJjR+9VCCElTjlSt0Ia83 AmTReUlQvtES+b17QnJuD8NTonL1qq3JLvrRkBnIqzHRdqqWvJXlvUut7fhDJFKT9h Fu0FO5Edb6hFl8uB1l/Xjdcqq5M0nxGnUIA2xWe3Cp+kp8FB2SvzZ09hTAQwY75ACq rA/pGFJSkTG1x4+xSUmNn8y2LfDDWpxfdbzusijFK8d3eRHfUIAIIprqYy6M/ovIcn xoOk4U7h4fZsg9OtsDnFshIqoPtHlBnhORLo+oWJSL4ysBfuaNNa7HKVnF3ekO0eWn vU++sjMzcynQg== From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, fw@strlen.de, horms@kernel.org Subject: [PATCH net-next 06/16] netfilter: flowtable: use tuple address to calculate next hop Date: Wed, 26 Nov 2025 20:56:01 +0000 Message-ID: <20251126205611.1284486-7-pablo@netfilter.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251126205611.1284486-1-pablo@netfilter.org> References: <20251126205611.1284486-1-pablo@netfilter.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This simplifies IPIP tunnel support coming in follow up patches. No function changes are intended. Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_flow_table_ip.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c index 61ab3102c8ec..ac6641a866e0 100644 --- a/net/netfilter/nf_flow_table_ip.c +++ b/net/netfilter/nf_flow_table_ip.c @@ -480,6 +480,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, { struct flow_offload_tuple_rhash *tuplehash; struct nf_flowtable *flow_table = priv; + struct flow_offload_tuple *other_tuple; enum flow_offload_tuple_dir dir; struct nf_flowtable_ctx ctx = { .in = state->in, @@ -488,6 +489,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, struct flow_offload *flow; struct neighbour *neigh; struct rtable *rt; + __be32 ip_daddr; int ret; tuplehash = nf_flow_offload_lookup(&ctx, flow_table, skb); @@ -510,8 +512,10 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, dir = tuplehash->tuple.dir; flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); + other_tuple = &flow->tuplehash[!dir].tuple; + ip_daddr = other_tuple->src_v4.s_addr; - if (nf_flow_encap_push(skb, &flow->tuplehash[!dir].tuple) < 0) + if (nf_flow_encap_push(skb, other_tuple) < 0) return NF_DROP; switch (tuplehash->tuple.xmit_type) { @@ -522,7 +526,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, flow_offload_teardown(flow); return NF_DROP; } - neigh = ip_neigh_gw4(rt->dst.dev, rt_nexthop(rt, flow->tuplehash[!dir].tuple.src_v4.s_addr)); + neigh = ip_neigh_gw4(rt->dst.dev, rt_nexthop(rt, ip_daddr)); if (IS_ERR(neigh)) { flow_offload_teardown(flow); return NF_DROP; @@ -787,11 +791,13 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, { struct flow_offload_tuple_rhash *tuplehash; struct nf_flowtable *flow_table = priv; + struct flow_offload_tuple *other_tuple; enum flow_offload_tuple_dir dir; struct nf_flowtable_ctx ctx = { .in = state->in, }; struct nf_flow_xmit xmit = {}; + struct in6_addr *ip6_daddr; struct flow_offload *flow; struct neighbour *neigh; struct rt6_info *rt; @@ -817,8 +823,10 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, dir = tuplehash->tuple.dir; flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); + other_tuple = &flow->tuplehash[!dir].tuple; + ip6_daddr = &other_tuple->src_v6; - if (nf_flow_encap_push(skb, &flow->tuplehash[!dir].tuple) < 0) + if (nf_flow_encap_push(skb, other_tuple) < 0) return NF_DROP; switch (tuplehash->tuple.xmit_type) { @@ -829,7 +837,7 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, flow_offload_teardown(flow); return NF_DROP; } - neigh = ip_neigh_gw6(rt->dst.dev, rt6_nexthop(rt, &flow->tuplehash[!dir].tuple.src_v6)); + neigh = ip_neigh_gw6(rt->dst.dev, rt6_nexthop(rt, ip6_daddr)); if (IS_ERR(neigh)) { flow_offload_teardown(flow); return NF_DROP; -- 2.47.3