From: Fernando Fernandez Mancera <fmancera@suse.de>
To: netdev@vger.kernel.org
Cc: horms@kernel.org, kuba@kernel.org, pabeni@redhat.com,
edumazet@kernel.org, davem@davemloft.net,
Fernando Fernandez Mancera <fmancera@suse.de>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Florian Westphal <fw@strlen.de>, Phil Sutter <phil@nwl.cc>,
Eric Dumazet <edumazet@google.com>,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 12/16 net-next v2] netfilter: ipv4: guard ip_route_me_harder() with CONFIG_IPV4
Date: Mon, 28 Sep 2026 21:30:08 +0200 [thread overview]
Message-ID: <20260928193046.6698-13-fmancera@suse.de> (raw)
In-Reply-To: <20260928193046.6698-1-fmancera@suse.de>
To enable compiling the network stack without IPv4, IPv4 specific packet
rerouting logic inside netfilter must be bypassed. Therefore, guard
ip_route_me_harder() with IS_ENABLED(CONFIG_IPV4) so it returns
-EPROTONOSUPPORT when IPv4 is disabled.
Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
---
net/ipv4/netfilter.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index ce9e1bfa4259..f2d9e0110b77 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -30,6 +30,9 @@ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, un
struct flow_keys flkeys;
unsigned int hh_len;
+ if (!IS_ENABLED(CONFIG_IPV4))
+ return -EPROTONOSUPPORT;
+
sk = sk_to_full_sk(sk);
flags = sk ? inet_sk_flowi_flags(sk) : 0;
--
2.55.0
next prev parent reply other threads:[~2026-09-28 19:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260928193046.6698-1-fmancera@suse.de>
2026-09-28 19:29 ` [PATCH 01/16 net-next v2] ipv4: introduce CONFIG_IPV4 to decouple the IPv4 stack Fernando Fernandez Mancera
2026-09-28 19:29 ` [PATCH 02/16 net-next v2] net: core: add IPv4 fallback stubs and guards for CONFIG_IPV4=n Fernando Fernandez Mancera
2026-09-28 19:29 ` [PATCH 03/16 net-next v2] net: inet: relocate ip_generic_getfrag and guard IPv4 socket logic Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 04/16 net-next v2] tcp: move protocol agnostic TCP functions out of tcp_ipv4.c Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 05/16 net-next v2] ipv4: raw: split IPv4 specific logic into raw_ipv4.c Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 06/16 net-next v2] ipv4: udp: split IPv4 specific logic into udp_ipv4.c Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 07/16 net-next v2] ipv4: icmp: split IPv4 specific logic into icmp_ipv4.c Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 08/16 net-next v2] ipv4: ping: split IPv4 specific logic into ping_ipv4.c Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 09/16 net-next v2] ipv4: fib: split common nexthop logic to fib_core.c Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 10/16 net-next v2] tunnels: guard IPv4 tunnel functions with CONFIG_IPV4 Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 11/16 net-next v2] ipv4: disable IPv4-only sysctls when CONFIG_IPV4=n Fernando Fernandez Mancera
2026-09-28 19:30 ` Fernando Fernandez Mancera [this message]
2026-09-28 19:30 ` [PATCH 13/16 net-next v2] net: bridge: guard ARP/RARP proxy and suppression with CONFIG_IPV4 Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 14/16 net-next v2] wifi: mac80211: replace CONFIG_INET with CONFIG_IPV4 guards Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 15/16 net-next v2] netlabel: cipso: introduce CONFIG_CIPSO to decouple IPv4 dependency Fernando Fernandez Mancera
2026-09-28 19:30 ` [PATCH 16/16 net-next v2] ipv4: make CONFIG_IPV4 boolean Fernando Fernandez Mancera
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