#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/percpu.h>
+#include <net/net_namespace.h>
struct pcpu_lstats {
unsigned long packets;
unsigned long bytes;
};
-static DEFINE_PER_CPU(struct pcpu_lstats, pcpu_lstats);
#define LOOPBACK_OVERHEAD (128 + MAX_HEADER + 16 + 16)
#ifdef LOOPBACK_TSO
static void emulate_large_send_offload(struct sk_buff *skb)
{
- struct iphdr *iph = skb->nh.iph;
- struct tcphdr *th = (struct tcphdr*)(skb->nh.raw + (iph->ihl * 4));
+ struct iphdr *iph = ip_hdr(skb);
+ struct tcphdr *th = (struct tcphdr *)(skb_network_header(skb) +
+ (iph->ihl * 4));
unsigned int doffset = (iph->ihl + th->doff) * 4;
unsigned int mtu = skb_shinfo(skb)->gso_size + doffset;
unsigned int offset = 0;
if (!nskb)
break;
skb_reserve(nskb, 32);
- nskb->mac.raw = nskb->data - 14;
- nskb->nh.raw = nskb->data;
- iph = nskb->nh.iph;
- memcpy(nskb->data, skb->nh.raw, doffset);
+ skb_set_mac_header(nskb, -ETH_HLEN);
+ skb_reset_network_header(nskb);
+ iph = ip_hdr(nskb);
+ skb_copy_to_linear_data(nskb, skb_network_header(skb),
+ doffset);
if (skb_copy_bits(skb,
doffset + offset,
nskb->data + doffset,
memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
nskb->pkt_type = skb->pkt_type;
- th = (struct tcphdr*)(nskb->nh.raw + iph->ihl*4);
+ th = (struct tcphdr *)(skb_network_header(nskb) + iph->ihl * 4);
iph->tot_len = htons(frag_size + doffset);
iph->id = htons(id);
iph->check = 0;
*/
static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
{
- struct pcpu_lstats *lb_stats;
+ struct pcpu_lstats *pcpu_lstats, *lb_stats;
skb_orphan(skb);
skb->protocol = eth_type_trans(skb,dev);
- skb->dev = dev;
#ifndef LOOPBACK_MUST_CHECKSUM
skb->ip_summed = CHECKSUM_UNNECESSARY;
#endif
#ifdef LOOPBACK_TSO
if (skb_is_gso(skb)) {
BUG_ON(skb->protocol != htons(ETH_P_IP));
- BUG_ON(skb->nh.iph->protocol != IPPROTO_TCP);
+ BUG_ON(ip_hdr(skb)->protocol != IPPROTO_TCP);
emulate_large_send_offload(skb);
return 0;
dev->last_rx = jiffies;
/* it's OK to use __get_cpu_var() because BHs are off */
- lb_stats = &__get_cpu_var(pcpu_lstats);
+ pcpu_lstats = netdev_priv(dev);
+ lb_stats = per_cpu_ptr(pcpu_lstats, smp_processor_id());
lb_stats->bytes += skb->len;
lb_stats->packets++;
return 0;
}
-static struct net_device_stats loopback_stats;
-
static struct net_device_stats *get_stats(struct net_device *dev)
{
- struct net_device_stats *stats = &loopback_stats;
+ const struct pcpu_lstats *pcpu_lstats;
+ struct net_device_stats *stats = &dev->stats;
unsigned long bytes = 0;
unsigned long packets = 0;
int i;
+ pcpu_lstats = netdev_priv(dev);
for_each_possible_cpu(i) {
const struct pcpu_lstats *lb_stats;
- lb_stats = &per_cpu(pcpu_lstats, i);
+ lb_stats = per_cpu_ptr(pcpu_lstats, i);
bytes += lb_stats->bytes;
packets += lb_stats->packets;
}
static const struct ethtool_ops loopback_ethtool_ops = {
.get_link = always_on,
- .get_tso = ethtool_op_get_tso,
.set_tso = ethtool_op_set_tso,
.get_tx_csum = always_on,
.get_sg = always_on,
.get_rx_csum = always_on,
};
+static int loopback_dev_init(struct net_device *dev)
+{
+ struct pcpu_lstats *lstats;
+
+ lstats = alloc_percpu(struct pcpu_lstats);
+ if (!lstats)
+ return -ENOMEM;
+
+ dev->priv = lstats;
+ return 0;
+}
+
+static void loopback_dev_free(struct net_device *dev)
+{
+ struct pcpu_lstats *lstats = netdev_priv(dev);
+
+ free_percpu(lstats);
+ free_netdev(dev);
+}
+
/*
* The loopback device is special. There is only one instance and
* it is statically allocated. Don't do this for other devices.
*/
-struct net_device loopback_dev = {
- .name = "lo",
- .get_stats = &get_stats,
- .priv = &loopback_stats,
- .mtu = (16 * 1024) + 20 + 20 + 12,
- .hard_start_xmit = loopback_xmit,
- .hard_header = eth_header,
- .hard_header_cache = eth_header_cache,
- .header_cache_update = eth_header_cache_update,
- .hard_header_len = ETH_HLEN, /* 14 */
- .addr_len = ETH_ALEN, /* 6 */
- .tx_queue_len = 0,
- .type = ARPHRD_LOOPBACK, /* 0x0001*/
- .rebuild_header = eth_rebuild_header,
- .flags = IFF_LOOPBACK,
- .features = NETIF_F_SG | NETIF_F_FRAGLIST
+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_TSO
+ | NETIF_F_TSO
#endif
- | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA
- | NETIF_F_LLTX,
- .ethtool_ops = &loopback_ethtool_ops,
-};
+ | NETIF_F_NO_CSUM
+ | NETIF_F_HIGHDMA
+ | NETIF_F_LLTX
+ | NETIF_F_NETNS_LOCAL,
+ dev->ethtool_ops = &loopback_ethtool_ops;
+ dev->init = loopback_dev_init;
+ dev->destructor = loopback_dev_free;
+}
/* Setup and register the loopback device. */
-int __init loopback_init(void)
+static int loopback_net_init(struct net *net)
{
- return register_netdev(&loopback_dev);
+ struct net_device *dev;
+ int err;
+
+ err = -ENOMEM;
+ dev = alloc_netdev(0, "lo", loopback_setup);
+ if (!dev)
+ goto out;
+
+ dev->nd_net = net;
+ err = register_netdev(dev);
+ if (err)
+ goto out_free_netdev;
+
+ err = 0;
+ net->loopback_dev = dev;
+
+out:
+ if (err)
+ panic("loopback: Failed to register netdevice: %d\n", err);
+ return err;
+
+out_free_netdev:
+ free_netdev(dev);
+ goto out;
+}
+
+static void loopback_net_exit(struct net *net)
+{
+ struct net_device *dev = net->loopback_dev;
+
+ unregister_netdev(dev);
+}
+
+static struct pernet_operations loopback_net_ops = {
+ .init = loopback_net_init,
+ .exit = loopback_net_exit,
};
-EXPORT_SYMBOL(loopback_dev);
+static int __init loopback_init(void)
+{
+ return register_pernet_device(&loopback_net_ops);
+}
+
+fs_initcall(loopback_init);
projects / linux-2.6-omap-h63xx.git / blobdiff