unsigned long bytes;
};
-#define LOOPBACK_OVERHEAD (128 + MAX_HEADER + 16 + 16)
-
/* KISS: just allocate small chunks and copy bits.
*
* So, in fact, this is documentation, explaining what we expect
#endif
dev->last_rx = jiffies;
+ /* it's OK to use per_cpu_ptr() because BHs are off */
pcpu_lstats = netdev_priv(dev);
lb_stats = per_cpu_ptr(pcpu_lstats, smp_processor_id());
lb_stats->bytes += skb->len;
}
/*
- * The loopback device is special. There is only one instance and
- * it is statically allocated. Don't do this for other devices.
+ * The loopback device is special. There is only one instance
+ * per network namespace.
*/
static void loopback_setup(struct net_device *dev)
{
dev->get_stats = &get_stats;
dev->mtu = (16 * 1024) + 20 + 20 + 12;
dev->hard_start_xmit = loopback_xmit;
- dev->hard_header = eth_header;
- dev->hard_header_cache = eth_header_cache;
- dev->header_cache_update = eth_header_cache_update;
dev->hard_header_len = ETH_HLEN; /* 14 */
dev->addr_len = ETH_ALEN; /* 6 */
dev->tx_queue_len = 0;
dev->type = ARPHRD_LOOPBACK; /* 0x0001*/
- dev->rebuild_header = eth_rebuild_header;
dev->flags = IFF_LOOPBACK;
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST
#ifdef LOOPBACK_TSO
| NETIF_F_NO_CSUM
| NETIF_F_HIGHDMA
| NETIF_F_LLTX
- | NETIF_F_NETNS_LOCAL,
+ | NETIF_F_NETNS_LOCAL;
dev->ethtool_ops = &loopback_ethtool_ops;
+ dev->header_ops = ð_header_ops;
dev->init = loopback_dev_init;
dev->destructor = loopback_dev_free;
}
/* Setup and register the loopback device. */
-static int loopback_net_init(struct net *net)
+static __net_init int loopback_net_init(struct net *net)
{
struct net_device *dev;
int err;
if (err)
goto out_free_netdev;
- err = 0;
net->loopback_dev = dev;
+ return 0;
-out:
- if (err)
- panic("loopback: Failed to register netdevice: %d\n", err);
- return err;
out_free_netdev:
free_netdev(dev);
- goto out;
+out:
+ if (net == &init_net)
+ panic("loopback: Failed to register netdevice: %d\n", err);
+ return err;
}
-static void loopback_net_exit(struct net *net)
+static __net_exit void loopback_net_exit(struct net *net)
{
struct net_device *dev = net->loopback_dev;
unregister_netdev(dev);
}
-static struct pernet_operations loopback_net_ops = {
+static struct pernet_operations __net_initdata loopback_net_ops = {
.init = loopback_net_init,
.exit = loopback_net_exit,
};
return register_pernet_device(&loopback_net_ops);
}
+/* Loopback is special. It should be initialized before any other network
+ * device and network subsystem.
+ */
fs_initcall(loopback_init);