netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_checksum sysctl

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

5 files changed, 7 insertions, 8 deletions

diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index 6ead8da..769680e 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -575,7 +575,7 @@ static int dccp_error(struct net *net, struct sk_buff *skb,
 		}
 	}
 
-	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
 	    nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_DCCP,
 				pf)) {
 		msg = "nf_ct_dccp: bad checksum ";
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index b5d62d6..131c9be 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -780,7 +780,7 @@ static int tcp_error(struct net *net,
 	 * because the checksum is assumed to be correct.
 	 */
 	/* FIXME: Source route IP option packets --RR */
-	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
 	    nf_checksum(skb, hooknum, dataoff, IPPROTO_TCP, pf)) {
 		if (LOG_INVALID(IPPROTO_TCP))
 			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index e0ee89e..3d3fffe 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -123,7 +123,7 @@ static int udp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
 	 * We skip checking packets on the outgoing path
 	 * because the checksum is assumed to be correct.
 	 * FIXME: Source route IP option packets --RR */
-	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
 	    nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
 		if (LOG_INVALID(IPPROTO_UDP))
 			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
index c5b77c8..3d1697c 100644
--- a/net/netfilter/nf_conntrack_proto_udplite.c
+++ b/net/netfilter/nf_conntrack_proto_udplite.c
@@ -129,7 +129,7 @@ static int udplite_error(struct net *net,
 	}
 
 	/* Checksum invalid? Ignore. */
-	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
 	    nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
 	    			pf)) {
 		if (LOG_INVALID(IPPROTO_UDPLITE))
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 64b4f95..5cd0663 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -322,9 +322,6 @@ static void nf_conntrack_standalone_fini_proc(struct net *net)
 
 /* Sysctl support */
 
-int nf_conntrack_checksum __read_mostly = 1;
-EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
-
 #ifdef CONFIG_SYSCTL
 /* Log invalid packets of a given protocol */
 static int log_invalid_proto_min = 0;
@@ -360,7 +357,7 @@ static ctl_table nf_ct_sysctl_table[] = {
 	{
 		.ctl_name	= NET_NF_CONNTRACK_CHECKSUM,
 		.procname	= "nf_conntrack_checksum",
-		.data		= &nf_conntrack_checksum,
+		.data		= &init_net.ct.sysctl_checksum,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec,
@@ -425,6 +422,7 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
 		goto out_kmemdup;
 
 	table[1].data = &net->ct.count;
+	table[3].data = &net->ct.sysctl_checksum;
 
 	net->ct.sysctl_header = register_net_sysctl_table(net,
 					nf_net_netfilter_sysctl_path, table);
@@ -474,6 +472,7 @@ static int nf_conntrack_net_init(struct net *net)
 	ret = nf_conntrack_standalone_init_proc(net);
 	if (ret < 0)
 		goto out_proc;
+	net->ct.sysctl_checksum = 1;
 	ret = nf_conntrack_standalone_init_sysctl(net);
 	if (ret < 0)
 		goto out_sysctl;