From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Mon, 27 Nov 2017 22:58:37 +0100
Subject: [PATCH] netfilter: remove route_key_size field in struct nf_afinfo

This is only needed by nf_queue, place this code where it belongs.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -311,7 +311,6 @@ struct nf_queue_entry;
 
 struct nf_afinfo {
 	unsigned short	family;
-	int		route_key_size;
 };
 
 extern const struct nf_afinfo __rcu *nf_afinfo[NFPROTO_NUMPROTO];
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -164,7 +164,6 @@ EXPORT_SYMBOL_GPL(nf_ip_route);
 
 static const struct nf_afinfo nf_ip_afinfo = {
 	.family			= AF_INET,
-	.route_key_size		= sizeof(struct ip_rt_info),
 };
 
 static int __init ipv4_netfilter_init(void)
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -180,7 +180,6 @@ static const struct nf_ipv6_ops ipv6ops
 
 static const struct nf_afinfo nf_ip6_afinfo = {
 	.family			= AF_INET6,
-	.route_key_size		= sizeof(struct ip6_rt_info),
 };
 
 int __init ipv6_netfilter_init(void)
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -15,6 +15,8 @@
 #include <linux/netfilter_bridge.h>
 #include <linux/seq_file.h>
 #include <linux/rcupdate.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
 #include <net/protocol.h>
 #include <net/netfilter/nf_queue.h>
 #include <net/dst.h>
@@ -145,9 +147,9 @@ static int __nf_queue(struct sk_buff *sk
 {
 	int status = -ENOENT;
 	struct nf_queue_entry *entry = NULL;
-	const struct nf_afinfo *afinfo;
 	const struct nf_queue_handler *qh;
 	struct net *net = state->net;
+	unsigned int route_key_size;
 
 	/* QUEUE == DROP if no one is waiting, to be safe. */
 	qh = rcu_dereference(net->nf.queue_handler);
@@ -156,11 +158,19 @@ static int __nf_queue(struct sk_buff *sk
 		goto err;
 	}
 
-	afinfo = nf_get_afinfo(state->pf);
-	if (!afinfo)
-		goto err;
+	switch (state->pf) {
+	case AF_INET:
+		route_key_size = sizeof(struct ip_rt_info);
+		break;
+	case AF_INET6:
+		route_key_size = sizeof(struct ip6_rt_info);
+		break;
+	default:
+		route_key_size = 0;
+		break;
+	}
 
-	entry = kmalloc(sizeof(*entry) + afinfo->route_key_size, GFP_ATOMIC);
+	entry = kmalloc(sizeof(*entry) + route_key_size, GFP_ATOMIC);
 	if (!entry) {
 		status = -ENOMEM;
 		goto err;
@@ -175,7 +185,7 @@ static int __nf_queue(struct sk_buff *sk
 		.skb	= skb,
 		.state	= *state,
 		.hook_index = index,
-		.size	= sizeof(*entry) + afinfo->route_key_size,
+		.size	= sizeof(*entry) + route_key_size,
 	};
 
 	nf_queue_entry_get_refs(entry);