netns xfrm: AH/ESP in netns!

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ah4.c

@@ -201,6 +201,7 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb)
 
 static void ah4_err(struct sk_buff *skb, u32 info)
 {
+	struct net *net = dev_net(skb->dev);
 	struct iphdr *iph = (struct iphdr *)skb->data;
 	struct ip_auth_hdr *ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
@@ -209,7 +210,7 @@ static void ah4_err(struct sk_buff *skb, u32 info)
 	    icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 		return;
 
-	x = xfrm_state_lookup(&init_net, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET);
+	x = xfrm_state_lookup(net, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET);
 	if (!x)
 		return;
 	printk(KERN_DEBUG "pmtu discovery on SA AH/%08x/%08x\n",
@@ -314,6 +315,7 @@ static struct net_protocol ah4_protocol = {
 	.handler	=	xfrm4_rcv,
 	.err_handler	=	ah4_err,
 	.no_policy	=	1,
+	.netns_ok	=	1,
 };
 
 static int __init ah4_init(void)

net/ipv4/esp4.c

@@ -413,6 +413,7 @@ static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
 
 static void esp4_err(struct sk_buff *skb, u32 info)
 {
+	struct net *net = dev_net(skb->dev);
 	struct iphdr *iph = (struct iphdr *)skb->data;
 	struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
@@ -421,7 +422,7 @@ static void esp4_err(struct sk_buff *skb, u32 info)
 	    icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 		return;
 
-	x = xfrm_state_lookup(&init_net, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET);
+	x = xfrm_state_lookup(net, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET);
 	if (!x)
 		return;
 	NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n",
@@ -618,6 +619,7 @@ static struct net_protocol esp4_protocol = {
 	.handler	=	xfrm4_rcv,
 	.err_handler	=	esp4_err,
 	.no_policy	=	1,
+	.netns_ok	=	1,
 };
 
 static int __init esp4_init(void)

net/ipv6/ah6.c

@@ -407,6 +407,7 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
 static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		    int type, int code, int offset, __be32 info)
 {
+	struct net *net = dev_net(skb->dev);
 	struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
 	struct ip_auth_hdr *ah = (struct ip_auth_hdr*)(skb->data+offset);
 	struct xfrm_state *x;
@@ -415,7 +416,7 @@ static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	    type != ICMPV6_PKT_TOOBIG)
 		return;
 
-	x = xfrm_state_lookup(&init_net, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET6);
+	x = xfrm_state_lookup(net, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET6);
 	if (!x)
 		return;
 

net/ipv6/esp6.c

@@ -356,6 +356,7 @@ static u32 esp6_get_mtu(struct xfrm_state *x, int mtu)
 static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		     int type, int code, int offset, __be32 info)
 {
+	struct net *net = dev_net(skb->dev);
 	struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
 	struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data + offset);
 	struct xfrm_state *x;
@@ -364,7 +365,7 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	    type != ICMPV6_PKT_TOOBIG)
 		return;
 
-	x = xfrm_state_lookup(&init_net, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET6);
+	x = xfrm_state_lookup(net, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET6);
 	if (!x)
 		return;
 	printk(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%pI6\n",