cassini: Only use chip checksum for ipv4 packets.

[linux-block.git] / net / ipv4 / ipip.c

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index e657a6605e084df730425a5eb2da8eed6b8acf61..149111f08e8d38b30a1bbbc4b8c42c27cd810b7d 100644 (file)
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -123,6 +123,12 @@
 
 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;
 };
 
@@ -130,39 +136,36 @@ 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 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;
@@ -177,19 +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;
@@ -199,9 +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);
@@ -209,15 +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;
        }
@@ -233,6 +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;
@@ -246,7 +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:
@@ -261,10 +269,10 @@ static void ipip_tunnel_uninit(struct net_device *dev)
 
        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);
 }
 
@@ -313,7 +321,7 @@ 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;
 
@@ -409,7 +417,7 @@ out:
        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)) {
+       if (ip_route_output_key(dev_net(skb->dev), &rt, &key)) {
                kfree_skb(skb2);
                return 0;
        }
@@ -422,7 +430,7 @@ out:
                fl.fl4_daddr = eiph->daddr;
                fl.fl4_src = eiph->saddr;
                fl.fl4_tos = eiph->tos;
-               if (ip_route_output_key(&init_net, &rt, &fl) ||
+               if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) ||
                    rt->u.dst.dev->type != ARPHRD_TUNNEL) {
                        ip_rt_put(rt);
                        kfree_skb(skb2);
@@ -473,7 +481,8 @@ 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);
@@ -551,7 +560,7 @@ 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;
                }
@@ -672,7 +681,7 @@ 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);
                }
@@ -680,7 +689,7 @@ 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);
@@ -706,7 +715,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
                                err = -EFAULT;
                                break;
                        }
-                       t = ipip_tunnel_locate(&p, 0);
+                       t = ipip_tunnel_locate(net, &p, 0);
                }
                if (t == NULL)
                        t = netdev_priv(dev);
@@ -732,7 +741,7 @@ 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 != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
                        if (t != NULL) {
@@ -747,12 +756,12 @@ 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);
                        }
                }
@@ -785,7 +794,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
                        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 == ipn->fb_tunnel_dev)
@@ -832,6 +841,7 @@ 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)
@@ -855,6 +865,7 @@ 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);
@@ -864,7 +875,7 @@ static int 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;
 }
 
@@ -877,13 +888,27 @@ static struct xfrm_tunnel ipip_handler = {
 static char banner[] __initdata =
        KERN_INFO "IPv4 over IPv4 tunneling driver\n";
 
+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;
 
        err = -ENOMEM;
-       ipn = kmalloc(sizeof(struct ipip_net), GFP_KERNEL);
+       ipn = kzalloc(sizeof(struct ipip_net), GFP_KERNEL);
        if (ipn == NULL)
                goto err_alloc;
 
@@ -891,6 +916,11 @@ static int ipip_init_net(struct net *net)
        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;
+
        ipn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel),
                                           "tunl0",
                                           ipip_tunnel_setup);
@@ -923,6 +953,7 @@ static void ipip_exit_net(struct net *net)
 
        ipn = net_generic(net, ipip_net_id);
        rtnl_lock();
+       ipip_destroy_tunnels(ipn);
        unregister_netdevice(ipn->fb_tunnel_dev);
        rtnl_unlock();
        kfree(ipn);
@@ -951,29 +982,11 @@ static int __init ipip_init(void)
        return err;
 }
 
-static void __exit ipip_destroy_tunnels(void)
-{
-       int prio;
-
-       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);
-               }
-       }
-}
-
 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();
-       rtnl_unlock();
-
        unregister_pernet_gen_device(ipip_net_id, &ipip_net_ops);
 }