static int loopback_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct net_private *np = netdev_priv(dev);
if (!skb_remove_foreign_references(skb)) {
np->stats.tx_dropped++;
dev_kfree_skb(skb);
return 0;
}
dst_release(skb->dst);
skb->dst = NULL;
skb_orphan(skb);
np->stats.tx_bytes += skb->len;
np->stats.tx_packets++;
/* Switch to loopback context. */
dev = np->loopback_dev;
np = netdev_priv(dev);
np->stats.rx_bytes += skb->len;
np->stats.rx_packets++;
if (skb->ip_summed == CHECKSUM_HW) {
/* Defer checksum calculation. */
skb->proto_csum_blank = 1;
/* Must be a local packet: assert its integrity. */
skb->proto_data_valid = 1;
}
skb->ip_summed = skb->proto_data_valid ?
CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
skb->pkt_type = PACKET_HOST; /* overridden by eth_type_trans() */
skb->protocol = eth_type_trans(skb, dev);
skb->dev = dev;
dev->last_rx = jiffies;
/* Flush netfilter context: rx'ed skbuffs not expected to have any. */
nf_reset(skb);
secpath_reset(skb);
netif_rx(skb);
return 0;
}
static int queue_enqueue(struct sk_buff *skb, struct Qdisc* sch)
{
struct queue_sched_data *q = qdisc_priv(sch);
if (likely(sch->qstats.backlog + skb->len <= FIFO_BUF))
{
if (!q->stop)
q->stop = skb;
if (!skb_remove_foreign_references(skb)) {
printk("error removing foreign ref\n");
return qdisc_reshape_fail(skb, sch);
}
return qdisc_enqueue_tail(skb, sch);
}
printk("queue reported full: %d,%d\n", sch->qstats.backlog, skb->len);
return qdisc_reshape_fail(skb, sch);
}
