IPIP: Use ip-tunneling code.
Reuse common ip-tunneling code which is re-factored from GRE module. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pravin B Shelar
David S. Miller
parent
c544193214
commit
fd58156e45
2 changed files with 57 additions and 690 deletions
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@ -166,6 +166,7 @@ config IP_PNP_RARP
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config NET_IPIP
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tristate "IP: tunneling"
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select INET_TUNNEL
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select NET_IP_TUNNEL
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---help---
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Tunneling means encapsulating data of one protocol type within
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another protocol and sending it over a channel that understands the
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746
net/ipv4/ipip.c
746
net/ipv4/ipip.c
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@ -117,221 +117,15 @@
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#define HASH_SIZE 16
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#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
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static bool log_ecn_error = true;
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module_param(log_ecn_error, bool, 0644);
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MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
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static int ipip_net_id __read_mostly;
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struct ipip_net {
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struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE];
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struct ip_tunnel __rcu *tunnels_r[HASH_SIZE];
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struct ip_tunnel __rcu *tunnels_l[HASH_SIZE];
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struct ip_tunnel __rcu *tunnels_wc[1];
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struct ip_tunnel __rcu **tunnels[4];
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struct net_device *fb_tunnel_dev;
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};
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static int ipip_tunnel_init(struct net_device *dev);
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static void ipip_tunnel_setup(struct net_device *dev);
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static void ipip_dev_free(struct net_device *dev);
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static struct rtnl_link_ops ipip_link_ops __read_mostly;
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static struct rtnl_link_stats64 *ipip_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *tot)
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{
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int i;
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for_each_possible_cpu(i) {
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const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i);
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u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
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unsigned int start;
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do {
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start = u64_stats_fetch_begin_bh(&tstats->syncp);
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rx_packets = tstats->rx_packets;
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tx_packets = tstats->tx_packets;
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rx_bytes = tstats->rx_bytes;
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tx_bytes = tstats->tx_bytes;
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} while (u64_stats_fetch_retry_bh(&tstats->syncp, start));
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tot->rx_packets += rx_packets;
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tot->tx_packets += tx_packets;
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tot->rx_bytes += rx_bytes;
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tot->tx_bytes += tx_bytes;
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}
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tot->tx_fifo_errors = dev->stats.tx_fifo_errors;
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tot->tx_carrier_errors = dev->stats.tx_carrier_errors;
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tot->tx_dropped = dev->stats.tx_dropped;
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tot->tx_aborted_errors = dev->stats.tx_aborted_errors;
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tot->tx_errors = dev->stats.tx_errors;
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tot->collisions = dev->stats.collisions;
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return tot;
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}
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static struct ip_tunnel *ipip_tunnel_lookup(struct net *net,
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__be32 remote, __be32 local)
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{
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unsigned int h0 = HASH(remote);
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unsigned int h1 = HASH(local);
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struct ip_tunnel *t;
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struct ipip_net *ipn = net_generic(net, ipip_net_id);
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for_each_ip_tunnel_rcu(t, ipn->tunnels_r_l[h0 ^ h1])
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if (local == t->parms.iph.saddr &&
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remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
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return t;
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for_each_ip_tunnel_rcu(t, ipn->tunnels_r[h0])
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if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
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return t;
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for_each_ip_tunnel_rcu(t, ipn->tunnels_l[h1])
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if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP))
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return t;
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t = rcu_dereference(ipn->tunnels_wc[0]);
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if (t && (t->dev->flags&IFF_UP))
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return t;
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return NULL;
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}
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static struct ip_tunnel __rcu **__ipip_bucket(struct ipip_net *ipn,
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struct ip_tunnel_parm *parms)
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{
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__be32 remote = parms->iph.daddr;
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__be32 local = parms->iph.saddr;
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unsigned int h = 0;
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int prio = 0;
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if (remote) {
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prio |= 2;
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h ^= HASH(remote);
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}
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if (local) {
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prio |= 1;
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h ^= HASH(local);
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}
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return &ipn->tunnels[prio][h];
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}
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static inline struct ip_tunnel __rcu **ipip_bucket(struct ipip_net *ipn,
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struct ip_tunnel *t)
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{
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return __ipip_bucket(ipn, &t->parms);
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}
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static void ipip_tunnel_unlink(struct ipip_net *ipn, struct ip_tunnel *t)
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{
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struct ip_tunnel __rcu **tp;
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struct ip_tunnel *iter;
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for (tp = ipip_bucket(ipn, t);
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(iter = rtnl_dereference(*tp)) != NULL;
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tp = &iter->next) {
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if (t == iter) {
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rcu_assign_pointer(*tp, t->next);
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break;
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}
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}
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}
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static void ipip_tunnel_link(struct ipip_net *ipn, struct ip_tunnel *t)
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{
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struct ip_tunnel __rcu **tp = ipip_bucket(ipn, t);
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rcu_assign_pointer(t->next, rtnl_dereference(*tp));
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rcu_assign_pointer(*tp, t);
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}
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static int ipip_tunnel_create(struct net_device *dev)
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{
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struct ip_tunnel *t = netdev_priv(dev);
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struct net *net = dev_net(dev);
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struct ipip_net *ipn = net_generic(net, ipip_net_id);
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int err;
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err = ipip_tunnel_init(dev);
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if (err < 0)
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goto out;
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err = register_netdevice(dev);
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if (err < 0)
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goto out;
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strcpy(t->parms.name, dev->name);
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dev->rtnl_link_ops = &ipip_link_ops;
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dev_hold(dev);
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ipip_tunnel_link(ipn, t);
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return 0;
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out:
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return err;
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}
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static struct ip_tunnel *ipip_tunnel_locate(struct net *net,
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struct ip_tunnel_parm *parms, int create)
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{
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__be32 remote = parms->iph.daddr;
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__be32 local = parms->iph.saddr;
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struct ip_tunnel *t, *nt;
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struct ip_tunnel __rcu **tp;
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struct net_device *dev;
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char name[IFNAMSIZ];
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struct ipip_net *ipn = net_generic(net, ipip_net_id);
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for (tp = __ipip_bucket(ipn, parms);
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(t = rtnl_dereference(*tp)) != NULL;
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tp = &t->next) {
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if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr)
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return t;
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}
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if (!create)
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return NULL;
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if (parms->name[0])
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strlcpy(name, parms->name, IFNAMSIZ);
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else
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strcpy(name, "tunl%d");
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dev = alloc_netdev(sizeof(*t), name, ipip_tunnel_setup);
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if (dev == NULL)
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return NULL;
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dev_net_set(dev, net);
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nt = netdev_priv(dev);
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nt->parms = *parms;
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if (ipip_tunnel_create(dev) < 0)
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goto failed_free;
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return nt;
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failed_free:
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ipip_dev_free(dev);
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return NULL;
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}
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/* called with RTNL */
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static void ipip_tunnel_uninit(struct net_device *dev)
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{
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struct net *net = dev_net(dev);
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struct ipip_net *ipn = net_generic(net, ipip_net_id);
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if (dev == ipn->fb_tunnel_dev)
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RCU_INIT_POINTER(ipn->tunnels_wc[0], NULL);
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else
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ipip_tunnel_unlink(ipn, netdev_priv(dev));
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dev_put(dev);
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}
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static int ipip_err(struct sk_buff *skb, u32 info)
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{
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@ -339,41 +133,17 @@ static int ipip_err(struct sk_buff *skb, u32 info)
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8 bytes of packet payload. It means, that precise relaying of
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ICMP in the real Internet is absolutely infeasible.
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*/
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struct net *net = dev_net(skb->dev);
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struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
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const struct iphdr *iph = (const struct iphdr *)skb->data;
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const int type = icmp_hdr(skb)->type;
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const int code = icmp_hdr(skb)->code;
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struct ip_tunnel *t;
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int err;
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switch (type) {
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default:
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case ICMP_PARAMETERPROB:
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return 0;
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case ICMP_DEST_UNREACH:
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switch (code) {
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case ICMP_SR_FAILED:
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case ICMP_PORT_UNREACH:
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/* Impossible event. */
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return 0;
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default:
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/* All others are translated to HOST_UNREACH.
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rfc2003 contains "deep thoughts" about NET_UNREACH,
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I believe they are just ether pollution. --ANK
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*/
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break;
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}
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break;
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case ICMP_TIME_EXCEEDED:
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if (code != ICMP_EXC_TTL)
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return 0;
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break;
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case ICMP_REDIRECT:
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break;
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}
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const int type = icmp_hdr(skb)->type;
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const int code = icmp_hdr(skb)->code;
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err = -ENOENT;
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t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr);
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t = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
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iph->daddr, iph->saddr, 0);
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if (t == NULL)
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goto out;
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@ -403,53 +173,29 @@ static int ipip_err(struct sk_buff *skb, u32 info)
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else
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t->err_count = 1;
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t->err_time = jiffies;
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out:
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out:
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return err;
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}
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static const struct tnl_ptk_info tpi = {
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/* no tunnel info required for ipip. */
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.proto = htons(ETH_P_IP),
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};
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static int ipip_rcv(struct sk_buff *skb)
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{
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struct net *net = dev_net(skb->dev);
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struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
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struct ip_tunnel *tunnel;
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const struct iphdr *iph = ip_hdr(skb);
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int err;
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tunnel = ipip_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr);
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if (tunnel != NULL) {
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struct pcpu_tstats *tstats;
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tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
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iph->saddr, iph->daddr, 0);
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if (tunnel) {
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if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
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goto drop;
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secpath_reset(skb);
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skb->mac_header = skb->network_header;
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skb_reset_network_header(skb);
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skb->protocol = htons(ETH_P_IP);
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skb->pkt_type = PACKET_HOST;
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__skb_tunnel_rx(skb, tunnel->dev);
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err = IP_ECN_decapsulate(iph, skb);
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if (unlikely(err)) {
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if (log_ecn_error)
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net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
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&iph->saddr, iph->tos);
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if (err > 1) {
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++tunnel->dev->stats.rx_frame_errors;
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++tunnel->dev->stats.rx_errors;
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goto drop;
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}
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}
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tstats = this_cpu_ptr(tunnel->dev->tstats);
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u64_stats_update_begin(&tstats->syncp);
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tstats->rx_packets++;
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tstats->rx_bytes += skb->len;
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u64_stats_update_end(&tstats->syncp);
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netif_rx(skb);
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return 0;
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return ip_tunnel_rcv(tunnel, skb, &tpi, log_ecn_error);
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}
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return -1;
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@ -463,333 +209,64 @@ static int ipip_rcv(struct sk_buff *skb)
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* This function assumes it is being called from dev_queue_xmit()
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* and that skb is filled properly by that function.
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*/
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static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct ip_tunnel *tunnel = netdev_priv(dev);
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const struct iphdr *tiph = &tunnel->parms.iph;
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u8 tos = tunnel->parms.iph.tos;
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__be16 df = tiph->frag_off;
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struct rtable *rt; /* Route to the other host */
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struct net_device *tdev; /* Device to other host */
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const struct iphdr *old_iph;
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struct iphdr *iph; /* Our new IP header */
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unsigned int max_headroom; /* The extra header space needed */
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__be32 dst = tiph->daddr;
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struct flowi4 fl4;
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int mtu;
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if (skb->protocol != htons(ETH_P_IP))
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if (unlikely(skb->protocol != htons(ETH_P_IP)))
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goto tx_error;
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old_iph = ip_hdr(skb);
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if (tos & 1)
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tos = old_iph->tos;
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if (!dst) {
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/* NBMA tunnel */
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if ((rt = skb_rtable(skb)) == NULL) {
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dev->stats.tx_fifo_errors++;
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goto tx_error;
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}
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dst = rt_nexthop(rt, old_iph->daddr);
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}
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rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
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dst, tiph->saddr,
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0, 0,
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IPPROTO_IPIP, RT_TOS(tos),
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tunnel->parms.link);
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if (IS_ERR(rt)) {
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dev->stats.tx_carrier_errors++;
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goto tx_error_icmp;
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}
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tdev = rt->dst.dev;
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if (tdev == dev) {
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ip_rt_put(rt);
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dev->stats.collisions++;
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goto tx_error;
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}
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df |= old_iph->frag_off & htons(IP_DF);
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if (df) {
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mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr);
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if (mtu < 68) {
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dev->stats.collisions++;
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ip_rt_put(rt);
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goto tx_error;
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}
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if (skb_dst(skb))
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skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
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if ((old_iph->frag_off & htons(IP_DF)) &&
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mtu < ntohs(old_iph->tot_len)) {
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icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
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htonl(mtu));
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ip_rt_put(rt);
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goto tx_error;
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}
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}
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if (tunnel->err_count > 0) {
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if (time_before(jiffies,
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tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
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tunnel->err_count--;
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dst_link_failure(skb);
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} else
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tunnel->err_count = 0;
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}
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/*
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* Okay, now see if we can stuff it in the buffer as-is.
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*/
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max_headroom = (LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr));
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if (skb_headroom(skb) < max_headroom || skb_shared(skb) ||
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(skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
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struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
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if (!new_skb) {
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ip_rt_put(rt);
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dev->stats.tx_dropped++;
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dev_kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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if (skb->sk)
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skb_set_owner_w(new_skb, skb->sk);
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dev_kfree_skb(skb);
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skb = new_skb;
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old_iph = ip_hdr(skb);
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}
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if (!skb->encapsulation) {
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if (likely(!skb->encapsulation)) {
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skb_reset_inner_headers(skb);
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skb->encapsulation = 1;
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}
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if (skb->ip_summed != CHECKSUM_PARTIAL)
|
||||
skb->ip_summed = CHECKSUM_NONE;
|
||||
|
||||
skb->transport_header = skb->network_header;
|
||||
skb_push(skb, sizeof(struct iphdr));
|
||||
skb_reset_network_header(skb);
|
||||
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
|
||||
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
|
||||
IPSKB_REROUTED);
|
||||
skb_dst_drop(skb);
|
||||
skb_dst_set(skb, &rt->dst);
|
||||
|
||||
/*
|
||||
* Push down and install the IPIP header.
|
||||
*/
|
||||
|
||||
iph = ip_hdr(skb);
|
||||
iph->version = 4;
|
||||
iph->ihl = sizeof(struct iphdr)>>2;
|
||||
iph->frag_off = df;
|
||||
iph->protocol = IPPROTO_IPIP;
|
||||
iph->tos = INET_ECN_encapsulate(tos, old_iph->tos);
|
||||
iph->daddr = fl4.daddr;
|
||||
iph->saddr = fl4.saddr;
|
||||
tunnel_ip_select_ident(skb, old_iph, &rt->dst);
|
||||
|
||||
if ((iph->ttl = tiph->ttl) == 0)
|
||||
iph->ttl = old_iph->ttl;
|
||||
|
||||
iptunnel_xmit(skb, dev);
|
||||
|
||||
ip_tunnel_xmit(skb, dev, tiph);
|
||||
return NETDEV_TX_OK;
|
||||
|
||||
tx_error_icmp:
|
||||
dst_link_failure(skb);
|
||||
tx_error:
|
||||
dev->stats.tx_errors++;
|
||||
dev_kfree_skb(skb);
|
||||
return NETDEV_TX_OK;
|
||||
}
|
||||
|
||||
static void ipip_tunnel_bind_dev(struct net_device *dev)
|
||||
{
|
||||
struct net_device *tdev = NULL;
|
||||
struct ip_tunnel *tunnel;
|
||||
const struct iphdr *iph;
|
||||
|
||||
tunnel = netdev_priv(dev);
|
||||
iph = &tunnel->parms.iph;
|
||||
|
||||
if (iph->daddr) {
|
||||
struct rtable *rt;
|
||||
struct flowi4 fl4;
|
||||
|
||||
rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
|
||||
iph->daddr, iph->saddr,
|
||||
0, 0,
|
||||
IPPROTO_IPIP,
|
||||
RT_TOS(iph->tos),
|
||||
tunnel->parms.link);
|
||||
if (!IS_ERR(rt)) {
|
||||
tdev = rt->dst.dev;
|
||||
ip_rt_put(rt);
|
||||
}
|
||||
dev->flags |= IFF_POINTOPOINT;
|
||||
}
|
||||
|
||||
if (!tdev && 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);
|
||||
dev->mtu = tdev->mtu - sizeof(struct iphdr);
|
||||
}
|
||||
dev->iflink = tunnel->parms.link;
|
||||
}
|
||||
|
||||
static void ipip_tunnel_update(struct ip_tunnel *t, struct ip_tunnel_parm *p)
|
||||
{
|
||||
struct net *net = dev_net(t->dev);
|
||||
struct ipip_net *ipn = net_generic(net, ipip_net_id);
|
||||
|
||||
ipip_tunnel_unlink(ipn, t);
|
||||
synchronize_net();
|
||||
t->parms.iph.saddr = p->iph.saddr;
|
||||
t->parms.iph.daddr = p->iph.daddr;
|
||||
memcpy(t->dev->dev_addr, &p->iph.saddr, 4);
|
||||
memcpy(t->dev->broadcast, &p->iph.daddr, 4);
|
||||
ipip_tunnel_link(ipn, t);
|
||||
t->parms.iph.ttl = p->iph.ttl;
|
||||
t->parms.iph.tos = p->iph.tos;
|
||||
t->parms.iph.frag_off = p->iph.frag_off;
|
||||
if (t->parms.link != p->link) {
|
||||
t->parms.link = p->link;
|
||||
ipip_tunnel_bind_dev(t->dev);
|
||||
}
|
||||
netdev_state_change(t->dev);
|
||||
}
|
||||
|
||||
static int
|
||||
ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
|
||||
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 == ipn->fb_tunnel_dev) {
|
||||
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
|
||||
err = -EFAULT;
|
||||
break;
|
||||
}
|
||||
t = ipip_tunnel_locate(net, &p, 0);
|
||||
}
|
||||
if (t == NULL)
|
||||
t = netdev_priv(dev);
|
||||
memcpy(&p, &t->parms, sizeof(p));
|
||||
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
|
||||
err = -EFAULT;
|
||||
break;
|
||||
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
|
||||
return -EFAULT;
|
||||
|
||||
case SIOCADDTUNNEL:
|
||||
case SIOCCHGTUNNEL:
|
||||
err = -EPERM;
|
||||
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
|
||||
goto done;
|
||||
|
||||
err = -EFAULT;
|
||||
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
|
||||
goto done;
|
||||
|
||||
err = -EINVAL;
|
||||
if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP ||
|
||||
p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)))
|
||||
goto done;
|
||||
if (p.iph.ttl)
|
||||
p.iph.frag_off |= htons(IP_DF);
|
||||
|
||||
t = ipip_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL);
|
||||
|
||||
if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
|
||||
if (t != NULL) {
|
||||
if (t->dev != dev) {
|
||||
err = -EEXIST;
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) ||
|
||||
(!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) {
|
||||
err = -EINVAL;
|
||||
break;
|
||||
}
|
||||
t = netdev_priv(dev);
|
||||
}
|
||||
|
||||
ipip_tunnel_update(t, &p);
|
||||
}
|
||||
|
||||
if (t) {
|
||||
err = 0;
|
||||
if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p)))
|
||||
err = -EFAULT;
|
||||
} else
|
||||
err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
|
||||
break;
|
||||
|
||||
case SIOCDELTUNNEL:
|
||||
err = -EPERM;
|
||||
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
|
||||
goto done;
|
||||
|
||||
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(net, &p, 0)) == NULL)
|
||||
goto done;
|
||||
err = -EPERM;
|
||||
if (t->dev == ipn->fb_tunnel_dev)
|
||||
goto done;
|
||||
dev = t->dev;
|
||||
}
|
||||
unregister_netdevice(dev);
|
||||
err = 0;
|
||||
break;
|
||||
|
||||
default:
|
||||
err = -EINVAL;
|
||||
}
|
||||
|
||||
done:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int ipip_tunnel_change_mtu(struct net_device *dev, int new_mtu)
|
||||
{
|
||||
if (new_mtu < 68 || new_mtu > 0xFFF8 - sizeof(struct iphdr))
|
||||
if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP ||
|
||||
p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)))
|
||||
return -EINVAL;
|
||||
dev->mtu = new_mtu;
|
||||
if (p.i_key || p.o_key || p.i_flags || p.o_flags)
|
||||
return -EINVAL;
|
||||
if (p.iph.ttl)
|
||||
p.iph.frag_off |= htons(IP_DF);
|
||||
|
||||
err = ip_tunnel_ioctl(dev, &p, cmd);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
|
||||
return -EFAULT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct net_device_ops ipip_netdev_ops = {
|
||||
.ndo_uninit = ipip_tunnel_uninit,
|
||||
.ndo_init = ipip_tunnel_init,
|
||||
.ndo_uninit = ip_tunnel_uninit,
|
||||
.ndo_start_xmit = ipip_tunnel_xmit,
|
||||
.ndo_do_ioctl = ipip_tunnel_ioctl,
|
||||
.ndo_change_mtu = ipip_tunnel_change_mtu,
|
||||
.ndo_get_stats64 = ipip_get_stats64,
|
||||
.ndo_change_mtu = ip_tunnel_change_mtu,
|
||||
.ndo_get_stats64 = ip_tunnel_get_stats64,
|
||||
};
|
||||
|
||||
static void ipip_dev_free(struct net_device *dev)
|
||||
{
|
||||
free_percpu(dev->tstats);
|
||||
free_netdev(dev);
|
||||
}
|
||||
|
||||
#define IPIP_FEATURES (NETIF_F_SG | \
|
||||
NETIF_F_FRAGLIST | \
|
||||
NETIF_F_HIGHDMA | \
|
||||
|
|
@ -798,11 +275,8 @@ static void ipip_dev_free(struct net_device *dev)
|
|||
static void ipip_tunnel_setup(struct net_device *dev)
|
||||
{
|
||||
dev->netdev_ops = &ipip_netdev_ops;
|
||||
dev->destructor = ipip_dev_free;
|
||||
|
||||
dev->type = ARPHRD_TUNNEL;
|
||||
dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr);
|
||||
dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr);
|
||||
dev->flags = IFF_NOARP;
|
||||
dev->iflink = 0;
|
||||
dev->addr_len = 4;
|
||||
|
|
@ -812,46 +286,19 @@ static void ipip_tunnel_setup(struct net_device *dev)
|
|||
|
||||
dev->features |= IPIP_FEATURES;
|
||||
dev->hw_features |= IPIP_FEATURES;
|
||||
ip_tunnel_setup(dev, ipip_net_id);
|
||||
}
|
||||
|
||||
static int ipip_tunnel_init(struct net_device *dev)
|
||||
{
|
||||
struct ip_tunnel *tunnel = netdev_priv(dev);
|
||||
|
||||
tunnel->dev = dev;
|
||||
|
||||
memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
|
||||
memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
|
||||
|
||||
ipip_tunnel_bind_dev(dev);
|
||||
|
||||
dev->tstats = alloc_percpu(struct pcpu_tstats);
|
||||
if (!dev->tstats)
|
||||
return -ENOMEM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __net_init 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);
|
||||
|
||||
iph->version = 4;
|
||||
iph->protocol = IPPROTO_IPIP;
|
||||
iph->ihl = 5;
|
||||
|
||||
dev->tstats = alloc_percpu(struct pcpu_tstats);
|
||||
if (!dev->tstats)
|
||||
return -ENOMEM;
|
||||
|
||||
dev_hold(dev);
|
||||
rcu_assign_pointer(ipn->tunnels_wc[0], tunnel);
|
||||
return 0;
|
||||
tunnel->hlen = 0;
|
||||
tunnel->parms.iph.protocol = IPPROTO_IPIP;
|
||||
return ip_tunnel_init(dev);
|
||||
}
|
||||
|
||||
static void ipip_netlink_parms(struct nlattr *data[],
|
||||
|
|
@ -891,28 +338,16 @@ static void ipip_netlink_parms(struct nlattr *data[],
|
|||
static int ipip_newlink(struct net *src_net, struct net_device *dev,
|
||||
struct nlattr *tb[], struct nlattr *data[])
|
||||
{
|
||||
struct net *net = dev_net(dev);
|
||||
struct ip_tunnel *nt;
|
||||
struct ip_tunnel_parm p;
|
||||
|
||||
nt = netdev_priv(dev);
|
||||
ipip_netlink_parms(data, &nt->parms);
|
||||
|
||||
if (ipip_tunnel_locate(net, &nt->parms, 0))
|
||||
return -EEXIST;
|
||||
|
||||
return ipip_tunnel_create(dev);
|
||||
ipip_netlink_parms(data, &p);
|
||||
return ip_tunnel_newlink(dev, tb, &p);
|
||||
}
|
||||
|
||||
static int ipip_changelink(struct net_device *dev, struct nlattr *tb[],
|
||||
struct nlattr *data[])
|
||||
{
|
||||
struct ip_tunnel *t;
|
||||
struct ip_tunnel_parm p;
|
||||
struct net *net = dev_net(dev);
|
||||
struct ipip_net *ipn = net_generic(net, ipip_net_id);
|
||||
|
||||
if (dev == ipn->fb_tunnel_dev)
|
||||
return -EINVAL;
|
||||
|
||||
ipip_netlink_parms(data, &p);
|
||||
|
||||
|
|
@ -920,16 +355,7 @@ static int ipip_changelink(struct net_device *dev, struct nlattr *tb[],
|
|||
(!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr))
|
||||
return -EINVAL;
|
||||
|
||||
t = ipip_tunnel_locate(net, &p, 0);
|
||||
|
||||
if (t) {
|
||||
if (t->dev != dev)
|
||||
return -EEXIST;
|
||||
} else
|
||||
t = netdev_priv(dev);
|
||||
|
||||
ipip_tunnel_update(t, &p);
|
||||
return 0;
|
||||
return ip_tunnel_changelink(dev, tb, &p);
|
||||
}
|
||||
|
||||
static size_t ipip_get_size(const struct net_device *dev)
|
||||
|
|
@ -986,6 +412,7 @@ static struct rtnl_link_ops ipip_link_ops __read_mostly = {
|
|||
.setup = ipip_tunnel_setup,
|
||||
.newlink = ipip_newlink,
|
||||
.changelink = ipip_changelink,
|
||||
.dellink = ip_tunnel_dellink,
|
||||
.get_size = ipip_get_size,
|
||||
.fill_info = ipip_fill_info,
|
||||
};
|
||||
|
|
@ -996,90 +423,29 @@ static struct xfrm_tunnel ipip_handler __read_mostly = {
|
|||
.priority = 1,
|
||||
};
|
||||
|
||||
static const char banner[] __initconst =
|
||||
KERN_INFO "IPv4 over IPv4 tunneling driver\n";
|
||||
|
||||
static void ipip_destroy_tunnels(struct ipip_net *ipn, struct list_head *head)
|
||||
{
|
||||
int prio;
|
||||
|
||||
for (prio = 1; prio < 4; prio++) {
|
||||
int h;
|
||||
for (h = 0; h < HASH_SIZE; h++) {
|
||||
struct ip_tunnel *t;
|
||||
|
||||
t = rtnl_dereference(ipn->tunnels[prio][h]);
|
||||
while (t != NULL) {
|
||||
unregister_netdevice_queue(t->dev, head);
|
||||
t = rtnl_dereference(t->next);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int __net_init ipip_init_net(struct net *net)
|
||||
{
|
||||
struct ipip_net *ipn = net_generic(net, ipip_net_id);
|
||||
struct ip_tunnel *t;
|
||||
int err;
|
||||
|
||||
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);
|
||||
if (!ipn->fb_tunnel_dev) {
|
||||
err = -ENOMEM;
|
||||
goto err_alloc_dev;
|
||||
}
|
||||
dev_net_set(ipn->fb_tunnel_dev, net);
|
||||
|
||||
err = ipip_fb_tunnel_init(ipn->fb_tunnel_dev);
|
||||
if (err)
|
||||
goto err_reg_dev;
|
||||
|
||||
if ((err = register_netdev(ipn->fb_tunnel_dev)))
|
||||
goto err_reg_dev;
|
||||
|
||||
t = netdev_priv(ipn->fb_tunnel_dev);
|
||||
|
||||
strcpy(t->parms.name, ipn->fb_tunnel_dev->name);
|
||||
return 0;
|
||||
|
||||
err_reg_dev:
|
||||
ipip_dev_free(ipn->fb_tunnel_dev);
|
||||
err_alloc_dev:
|
||||
/* nothing */
|
||||
return err;
|
||||
return ip_tunnel_init_net(net, ipip_net_id, &ipip_link_ops, "tunl0");
|
||||
}
|
||||
|
||||
static void __net_exit ipip_exit_net(struct net *net)
|
||||
{
|
||||
struct ipip_net *ipn = net_generic(net, ipip_net_id);
|
||||
LIST_HEAD(list);
|
||||
|
||||
rtnl_lock();
|
||||
ipip_destroy_tunnels(ipn, &list);
|
||||
unregister_netdevice_queue(ipn->fb_tunnel_dev, &list);
|
||||
unregister_netdevice_many(&list);
|
||||
rtnl_unlock();
|
||||
struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
|
||||
ip_tunnel_delete_net(itn);
|
||||
}
|
||||
|
||||
static struct pernet_operations ipip_net_ops = {
|
||||
.init = ipip_init_net,
|
||||
.exit = ipip_exit_net,
|
||||
.id = &ipip_net_id,
|
||||
.size = sizeof(struct ipip_net),
|
||||
.size = sizeof(struct ip_tunnel_net),
|
||||
};
|
||||
|
||||
static int __init ipip_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
printk(banner);
|
||||
pr_info("ipip: IPv4 over IPv4 tunneling driver\n");
|
||||
|
||||
err = register_pernet_device(&ipip_net_ops);
|
||||
if (err < 0)
|
||||
|
|
|
|||
Loading…
Reference in a new issue