X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fipv4%2Fipip.c;h=af5cb53da5cccdd68350c9a83a66f3fdb81f71d3;hb=252815b0cfe711001eff0327872209986b36d490;hp=dbaed69de06a8f1a52b4034c8531118bd9824d74;hpb=c523aef0f7284970463ebd77a54bca9069711d4a;p=linux-2.6

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index dbaed69de0..af5cb53da5 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -115,49 +115,57 @@
 #include <net/ipip.h>
 #include <net/inet_ecn.h>
 #include <net/xfrm.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
 
 #define HASH_SIZE  16
 #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
 
+static int ipip_net_id;
+struct ipip_net {
+	struct ip_tunnel *tunnels_r_l[HASH_SIZE];
+	struct ip_tunnel *tunnels_r[HASH_SIZE];
+	struct ip_tunnel *tunnels_l[HASH_SIZE];
+	struct ip_tunnel *tunnels_wc[1];
+	struct ip_tunnel **tunnels[4];
+
+	struct net_device *fb_tunnel_dev;
+};
+
 static int ipip_fb_tunnel_init(struct net_device *dev);
 static int ipip_tunnel_init(struct net_device *dev);
 static void ipip_tunnel_setup(struct net_device *dev);
 
-static struct net_device *ipip_fb_tunnel_dev;
-
-static struct ip_tunnel *tunnels_r_l[HASH_SIZE];
-static struct ip_tunnel *tunnels_r[HASH_SIZE];
-static struct ip_tunnel *tunnels_l[HASH_SIZE];
-static struct ip_tunnel *tunnels_wc[1];
-static struct ip_tunnel **tunnels[4] = { tunnels_wc, tunnels_l, tunnels_r, tunnels_r_l };
-
 static DEFINE_RWLOCK(ipip_lock);
 
-static struct ip_tunnel * ipip_tunnel_lookup(__be32 remote, __be32 local)
+static struct ip_tunnel * ipip_tunnel_lookup(struct net *net,
+		__be32 remote, __be32 local)
 {
 	unsigned h0 = HASH(remote);
 	unsigned h1 = HASH(local);
 	struct ip_tunnel *t;
+	struct ipip_net *ipn = net_generic(net, ipip_net_id);
 
-	for (t = tunnels_r_l[h0^h1]; t; t = t->next) {
+	for (t = ipn->tunnels_r_l[h0^h1]; t; t = t->next) {
 		if (local == t->parms.iph.saddr &&
 		    remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
 			return t;
 	}
-	for (t = tunnels_r[h0]; t; t = t->next) {
+	for (t = ipn->tunnels_r[h0]; t; t = t->next) {
 		if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
 			return t;
 	}
-	for (t = tunnels_l[h1]; t; t = t->next) {
+	for (t = ipn->tunnels_l[h1]; t; t = t->next) {
 		if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP))
 			return t;
 	}
-	if ((t = tunnels_wc[0]) != NULL && (t->dev->flags&IFF_UP))
+	if ((t = ipn->tunnels_wc[0]) != NULL && (t->dev->flags&IFF_UP))
 		return t;
 	return NULL;
 }
 
-static struct ip_tunnel **__ipip_bucket(struct ip_tunnel_parm *parms)
+static struct ip_tunnel **__ipip_bucket(struct ipip_net *ipn,
+		struct ip_tunnel_parm *parms)
 {
 	__be32 remote = parms->iph.daddr;
 	__be32 local = parms->iph.saddr;
@@ -172,19 +180,20 @@ static struct ip_tunnel **__ipip_bucket(struct ip_tunnel_parm *parms)
 		prio |= 1;
 		h ^= HASH(local);
 	}
-	return &tunnels[prio][h];
+	return &ipn->tunnels[prio][h];
 }
 
-static inline struct ip_tunnel **ipip_bucket(struct ip_tunnel *t)
+static inline struct ip_tunnel **ipip_bucket(struct ipip_net *ipn,
+		struct ip_tunnel *t)
 {
-	return __ipip_bucket(&t->parms);
+	return __ipip_bucket(ipn, &t->parms);
 }
 
-static void ipip_tunnel_unlink(struct ip_tunnel *t)
+static void ipip_tunnel_unlink(struct ipip_net *ipn, struct ip_tunnel *t)
 {
 	struct ip_tunnel **tp;
 
-	for (tp = ipip_bucket(t); *tp; tp = &(*tp)->next) {
+	for (tp = ipip_bucket(ipn, t); *tp; tp = &(*tp)->next) {
 		if (t == *tp) {
 			write_lock_bh(&ipip_lock);
 			*tp = t->next;
@@ -194,9 +203,9 @@ static void ipip_tunnel_unlink(struct ip_tunnel *t)
 	}
 }
 
-static void ipip_tunnel_link(struct ip_tunnel *t)
+static void ipip_tunnel_link(struct ipip_net *ipn, struct ip_tunnel *t)
 {
-	struct ip_tunnel **tp = ipip_bucket(t);
+	struct ip_tunnel **tp = ipip_bucket(ipn, t);
 
 	t->next = *tp;
 	write_lock_bh(&ipip_lock);
@@ -204,15 +213,17 @@ static void ipip_tunnel_link(struct ip_tunnel *t)
 	write_unlock_bh(&ipip_lock);
 }
 
-static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int create)
+static struct ip_tunnel * ipip_tunnel_locate(struct net *net,
+		struct ip_tunnel_parm *parms, int create)
 {
 	__be32 remote = parms->iph.daddr;
 	__be32 local = parms->iph.saddr;
 	struct ip_tunnel *t, **tp, *nt;
 	struct net_device *dev;
 	char name[IFNAMSIZ];
+	struct ipip_net *ipn = net_generic(net, ipip_net_id);
 
-	for (tp = __ipip_bucket(parms); (t = *tp) != NULL; tp = &t->next) {
+	for (tp = __ipip_bucket(ipn, parms); (t = *tp) != NULL; tp = &t->next) {
 		if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr)
 			return t;
 	}
@@ -228,6 +239,8 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
 	if (dev == NULL)
 		return NULL;
 
+	dev_net_set(dev, net);
+
 	if (strchr(name, '%')) {
 		if (dev_alloc_name(dev, name) < 0)
 			goto failed_free;
@@ -241,7 +254,7 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
 		goto failed_free;
 
 	dev_hold(dev);
-	ipip_tunnel_link(nt);
+	ipip_tunnel_link(ipn, nt);
 	return nt;
 
 failed_free:
@@ -251,20 +264,22 @@ failed_free:
 
 static void ipip_tunnel_uninit(struct net_device *dev)
 {
-	if (dev == ipip_fb_tunnel_dev) {
+	struct net *net = dev_net(dev);
+	struct ipip_net *ipn = net_generic(net, ipip_net_id);
+
+	if (dev == ipn->fb_tunnel_dev) {
 		write_lock_bh(&ipip_lock);
-		tunnels_wc[0] = NULL;
+		ipn->tunnels_wc[0] = NULL;
 		write_unlock_bh(&ipip_lock);
 	} else
-		ipip_tunnel_unlink(netdev_priv(dev));
+		ipip_tunnel_unlink(ipn, netdev_priv(dev));
 	dev_put(dev);
 }
 
 static int ipip_err(struct sk_buff *skb, u32 info)
 {
-#ifndef I_WISH_WORLD_WERE_PERFECT
 
-/* It is not :-( All the routers (except for Linux) return only
+/* All the routers (except for Linux) return only
    8 bytes of packet payload. It means, that precise relaying of
    ICMP in the real Internet is absolutely infeasible.
  */
@@ -305,7 +320,7 @@ static int ipip_err(struct sk_buff *skb, u32 info)
 	err = -ENOENT;
 
 	read_lock(&ipip_lock);
-	t = ipip_tunnel_lookup(iph->daddr, iph->saddr);
+	t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr);
 	if (t == NULL || t->parms.iph.daddr == 0)
 		goto out;
 
@@ -321,133 +336,6 @@ static int ipip_err(struct sk_buff *skb, u32 info)
 out:
 	read_unlock(&ipip_lock);
 	return err;
-#else
-	struct iphdr *iph = (struct iphdr*)dp;
-	int hlen = iph->ihl<<2;
-	struct iphdr *eiph;
-	const int type = icmp_hdr(skb)->type;
-	const int code = icmp_hdr(skb)->code;
-	int rel_type = 0;
-	int rel_code = 0;
-	__be32 rel_info = 0;
-	__u32 n = 0;
-	struct sk_buff *skb2;
-	struct flowi fl;
-	struct rtable *rt;
-
-	if (len < hlen + sizeof(struct iphdr))
-		return 0;
-	eiph = (struct iphdr*)(dp + hlen);
-
-	switch (type) {
-	default:
-		return 0;
-	case ICMP_PARAMETERPROB:
-		n = ntohl(icmp_hdr(skb)->un.gateway) >> 24;
-		if (n < hlen)
-			return 0;
-
-		/* So... This guy found something strange INSIDE encapsulated
-		   packet. Well, he is fool, but what can we do ?
-		 */
-		rel_type = ICMP_PARAMETERPROB;
-		rel_info = htonl((n - hlen) << 24);
-		break;
-
-	case ICMP_DEST_UNREACH:
-		switch (code) {
-		case ICMP_SR_FAILED:
-		case ICMP_PORT_UNREACH:
-			/* Impossible event. */
-			return 0;
-		case ICMP_FRAG_NEEDED:
-			/* And it is the only really necessary thing :-) */
-			n = ntohs(icmp_hdr(skb)->un.frag.mtu);
-			if (n < hlen+68)
-				return 0;
-			n -= hlen;
-			/* BSD 4.2 MORE DOES NOT EXIST IN NATURE. */
-			if (n > ntohs(eiph->tot_len))
-				return 0;
-			rel_info = htonl(n);
-			break;
-		default:
-			/* All others are translated to HOST_UNREACH.
-			   rfc2003 contains "deep thoughts" about NET_UNREACH,
-			   I believe, it is just ether pollution. --ANK
-			 */
-			rel_type = ICMP_DEST_UNREACH;
-			rel_code = ICMP_HOST_UNREACH;
-			break;
-		}
-		break;
-	case ICMP_TIME_EXCEEDED:
-		if (code != ICMP_EXC_TTL)
-			return 0;
-		break;
-	}
-
-	/* Prepare fake skb to feed it to icmp_send */
-	skb2 = skb_clone(skb, GFP_ATOMIC);
-	if (skb2 == NULL)
-		return 0;
-	dst_release(skb2->dst);
-	skb2->dst = NULL;
-	skb_pull(skb2, skb->data - (u8*)eiph);
-	skb_reset_network_header(skb2);
-
-	/* Try to guess incoming interface */
-	memset(&fl, 0, sizeof(fl));
-	fl.fl4_daddr = eiph->saddr;
-	fl.fl4_tos = RT_TOS(eiph->tos);
-	fl.proto = IPPROTO_IPIP;
-	if (ip_route_output_key(&init_net, &rt, &key)) {
-		kfree_skb(skb2);
-		return 0;
-	}
-	skb2->dev = rt->u.dst.dev;
-
-	/* route "incoming" packet */
-	if (rt->rt_flags&RTCF_LOCAL) {
-		ip_rt_put(rt);
-		rt = NULL;
-		fl.fl4_daddr = eiph->daddr;
-		fl.fl4_src = eiph->saddr;
-		fl.fl4_tos = eiph->tos;
-		if (ip_route_output_key(&init_net, &rt, &fl) ||
-		    rt->u.dst.dev->type != ARPHRD_TUNNEL) {
-			ip_rt_put(rt);
-			kfree_skb(skb2);
-			return 0;
-		}
-	} else {
-		ip_rt_put(rt);
-		if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, skb2->dev) ||
-		    skb2->dst->dev->type != ARPHRD_TUNNEL) {
-			kfree_skb(skb2);
-			return 0;
-		}
-	}
-
-	/* change mtu on this route */
-	if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
-		if (n > dst_mtu(skb2->dst)) {
-			kfree_skb(skb2);
-			return 0;
-		}
-		skb2->dst->ops->update_pmtu(skb2->dst, n);
-	} else if (type == ICMP_TIME_EXCEEDED) {
-		struct ip_tunnel *t = netdev_priv(skb2->dev);
-		if (t->parms.iph.ttl) {
-			rel_type = ICMP_DEST_UNREACH;
-			rel_code = ICMP_HOST_UNREACH;
-		}
-	}
-
-	icmp_send(skb2, rel_type, rel_code, rel_info);
-	kfree_skb(skb2);
-	return 0;
-#endif
 }
 
 static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph,
@@ -465,7 +353,8 @@ static int ipip_rcv(struct sk_buff *skb)
 	const struct iphdr *iph = ip_hdr(skb);
 
 	read_lock(&ipip_lock);
-	if ((tunnel = ipip_tunnel_lookup(iph->saddr, iph->daddr)) != NULL) {
+	if ((tunnel = ipip_tunnel_lookup(dev_net(skb->dev),
+					iph->saddr, iph->daddr)) != NULL) {
 		if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
 			read_unlock(&ipip_lock);
 			kfree_skb(skb);
@@ -528,7 +417,7 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	if (!dst) {
 		/* NBMA tunnel */
-		if ((rt = (struct rtable*)skb->dst) == NULL) {
+		if ((rt = skb->rtable) == NULL) {
 			tunnel->stat.tx_fifo_errors++;
 			goto tx_error;
 		}
@@ -543,7 +432,7 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 						.saddr = tiph->saddr,
 						.tos = RT_TOS(tos) } },
 				    .proto = IPPROTO_IPIP };
-		if (ip_route_output_key(&init_net, &rt, &fl)) {
+		if (ip_route_output_key(dev_net(dev), &rt, &fl)) {
 			tunnel->stat.tx_carrier_errors++;
 			goto tx_error_icmp;
 		}
@@ -664,7 +553,7 @@ static void ipip_tunnel_bind_dev(struct net_device *dev)
 						.tos = RT_TOS(iph->tos) } },
 				    .proto = IPPROTO_IPIP };
 		struct rtable *rt;
-		if (!ip_route_output_key(&init_net, &rt, &fl)) {
+		if (!ip_route_output_key(dev_net(dev), &rt, &fl)) {
 			tdev = rt->u.dst.dev;
 			ip_rt_put(rt);
 		}
@@ -672,7 +561,7 @@ static void ipip_tunnel_bind_dev(struct net_device *dev)
 	}
 
 	if (!tdev && tunnel->parms.link)
-		tdev = __dev_get_by_index(&init_net, tunnel->parms.link);
+		tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link);
 
 	if (tdev) {
 		dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr);
@@ -687,16 +576,18 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 	int err = 0;
 	struct ip_tunnel_parm p;
 	struct ip_tunnel *t;
+	struct net *net = dev_net(dev);
+	struct ipip_net *ipn = net_generic(net, ipip_net_id);
 
 	switch (cmd) {
 	case SIOCGETTUNNEL:
 		t = NULL;
-		if (dev == ipip_fb_tunnel_dev) {
+		if (dev == ipn->fb_tunnel_dev) {
 			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
 				err = -EFAULT;
 				break;
 			}
-			t = ipip_tunnel_locate(&p, 0);
+			t = ipip_tunnel_locate(net, &p, 0);
 		}
 		if (t == NULL)
 			t = netdev_priv(dev);
@@ -722,9 +613,9 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 		if (p.iph.ttl)
 			p.iph.frag_off |= htons(IP_DF);
 
-		t = ipip_tunnel_locate(&p, cmd == SIOCADDTUNNEL);
+		t = ipip_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL);
 
-		if (dev != ipip_fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
+		if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
 			if (t != NULL) {
 				if (t->dev != dev) {
 					err = -EEXIST;
@@ -737,12 +628,12 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 					break;
 				}
 				t = netdev_priv(dev);
-				ipip_tunnel_unlink(t);
+				ipip_tunnel_unlink(ipn, t);
 				t->parms.iph.saddr = p.iph.saddr;
 				t->parms.iph.daddr = p.iph.daddr;
 				memcpy(dev->dev_addr, &p.iph.saddr, 4);
 				memcpy(dev->broadcast, &p.iph.daddr, 4);
-				ipip_tunnel_link(t);
+				ipip_tunnel_link(ipn, t);
 				netdev_state_change(dev);
 			}
 		}
@@ -770,15 +661,15 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 		if (!capable(CAP_NET_ADMIN))
 			goto done;
 
-		if (dev == ipip_fb_tunnel_dev) {
+		if (dev == ipn->fb_tunnel_dev) {
 			err = -EFAULT;
 			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
 				goto done;
 			err = -ENOENT;
-			if ((t = ipip_tunnel_locate(&p, 0)) == NULL)
+			if ((t = ipip_tunnel_locate(net, &p, 0)) == NULL)
 				goto done;
 			err = -EPERM;
-			if (t->dev == ipip_fb_tunnel_dev)
+			if (t->dev == ipn->fb_tunnel_dev)
 				goto done;
 			dev = t->dev;
 		}
@@ -822,6 +713,7 @@ static void ipip_tunnel_setup(struct net_device *dev)
 	dev->flags		= IFF_NOARP;
 	dev->iflink		= 0;
 	dev->addr_len		= 4;
+	dev->features		|= NETIF_F_NETNS_LOCAL;
 }
 
 static int ipip_tunnel_init(struct net_device *dev)
@@ -841,10 +733,11 @@ static int ipip_tunnel_init(struct net_device *dev)
 	return 0;
 }
 
-static int __init ipip_fb_tunnel_init(struct net_device *dev)
+static int ipip_fb_tunnel_init(struct net_device *dev)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct iphdr *iph = &tunnel->parms.iph;
+	struct ipip_net *ipn = net_generic(dev_net(dev), ipip_net_id);
 
 	tunnel->dev = dev;
 	strcpy(tunnel->parms.name, dev->name);
@@ -854,7 +747,7 @@ static int __init ipip_fb_tunnel_init(struct net_device *dev)
 	iph->ihl		= 5;
 
 	dev_hold(dev);
-	tunnels_wc[0]		= tunnel;
+	ipn->tunnels_wc[0]	= tunnel;
 	return 0;
 }
 
@@ -867,50 +760,98 @@ static struct xfrm_tunnel ipip_handler = {
 static char banner[] __initdata =
 	KERN_INFO "IPv4 over IPv4 tunneling driver\n";
 
-static int __init ipip_init(void)
+static void ipip_destroy_tunnels(struct ipip_net *ipn)
+{
+	int prio;
+
+	for (prio = 1; prio < 4; prio++) {
+		int h;
+		for (h = 0; h < HASH_SIZE; h++) {
+			struct ip_tunnel *t;
+			while ((t = ipn->tunnels[prio][h]) != NULL)
+				unregister_netdevice(t->dev);
+		}
+	}
+}
+
+static int ipip_init_net(struct net *net)
 {
 	int err;
+	struct ipip_net *ipn;
 
-	printk(banner);
+	err = -ENOMEM;
+	ipn = kzalloc(sizeof(struct ipip_net), GFP_KERNEL);
+	if (ipn == NULL)
+		goto err_alloc;
 
-	if (xfrm4_tunnel_register(&ipip_handler, AF_INET)) {
-		printk(KERN_INFO "ipip init: can't register tunnel\n");
-		return -EAGAIN;
-	}
+	err = net_assign_generic(net, ipip_net_id, ipn);
+	if (err < 0)
+		goto err_assign;
+
+	ipn->tunnels[0] = ipn->tunnels_wc;
+	ipn->tunnels[1] = ipn->tunnels_l;
+	ipn->tunnels[2] = ipn->tunnels_r;
+	ipn->tunnels[3] = ipn->tunnels_r_l;
 
-	ipip_fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel),
+	ipn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel),
 					   "tunl0",
 					   ipip_tunnel_setup);
-	if (!ipip_fb_tunnel_dev) {
+	if (!ipn->fb_tunnel_dev) {
 		err = -ENOMEM;
-		goto err1;
+		goto err_alloc_dev;
 	}
 
-	ipip_fb_tunnel_dev->init = ipip_fb_tunnel_init;
+	ipn->fb_tunnel_dev->init = ipip_fb_tunnel_init;
+	dev_net_set(ipn->fb_tunnel_dev, net);
+
+	if ((err = register_netdev(ipn->fb_tunnel_dev)))
+		goto err_reg_dev;
+
+	return 0;
 
-	if ((err = register_netdev(ipip_fb_tunnel_dev)))
-		goto err2;
- out:
+err_reg_dev:
+	free_netdev(ipn->fb_tunnel_dev);
+err_alloc_dev:
+	/* nothing */
+err_assign:
+	kfree(ipn);
+err_alloc:
 	return err;
- err2:
-	free_netdev(ipip_fb_tunnel_dev);
- err1:
-	xfrm4_tunnel_deregister(&ipip_handler, AF_INET);
-	goto out;
 }
 
-static void __exit ipip_destroy_tunnels(void)
+static void ipip_exit_net(struct net *net)
 {
-	int prio;
+	struct ipip_net *ipn;
 
-	for (prio = 1; prio < 4; prio++) {
-		int h;
-		for (h = 0; h < HASH_SIZE; h++) {
-			struct ip_tunnel *t;
-			while ((t = tunnels[prio][h]) != NULL)
-				unregister_netdevice(t->dev);
-		}
+	ipn = net_generic(net, ipip_net_id);
+	rtnl_lock();
+	ipip_destroy_tunnels(ipn);
+	unregister_netdevice(ipn->fb_tunnel_dev);
+	rtnl_unlock();
+	kfree(ipn);
+}
+
+static struct pernet_operations ipip_net_ops = {
+	.init = ipip_init_net,
+	.exit = ipip_exit_net,
+};
+
+static int __init ipip_init(void)
+{
+	int err;
+
+	printk(banner);
+
+	if (xfrm4_tunnel_register(&ipip_handler, AF_INET)) {
+		printk(KERN_INFO "ipip init: can't register tunnel\n");
+		return -EAGAIN;
 	}
+
+	err = register_pernet_gen_device(&ipip_net_id, &ipip_net_ops);
+	if (err)
+		xfrm4_tunnel_deregister(&ipip_handler, AF_INET);
+
+	return err;
 }
 
 static void __exit ipip_fini(void)
@@ -918,10 +859,7 @@ static void __exit ipip_fini(void)
 	if (xfrm4_tunnel_deregister(&ipip_handler, AF_INET))
 		printk(KERN_INFO "ipip close: can't deregister tunnel\n");
 
-	rtnl_lock();
-	ipip_destroy_tunnels();
-	unregister_netdevice(ipip_fb_tunnel_dev);
-	rtnl_unlock();
+	unregister_pernet_gen_device(ipip_net_id, &ipip_net_ops);
 }
 
 module_init(ipip_init);