memo

kernel skbuff modification
- include/linux/skbuff.h

        __u8    ovbench_type;
        __u8    ovbench_encaped;
        __u64   ovbench_timestamp[16];

is added to struct sk_buff.

- net/core/skbuff.c

        /* copy ovbench params and time stamps*/
	new->ovbench_type       = old->ovbench_type;
	new->ovbench_encaped    = old->ovbench_encaped;
        new->ovbench_timestamp[0] = old->ovbench_timestamp[0];
        new->ovbench_timestamp[1] = old->ovbench_timestamp[1];
        new->ovbench_timestamp[2] = old->ovbench_timestamp[2];
        new->ovbench_timestamp[3] = old->ovbench_timestamp[3];
        new->ovbench_timestamp[4] = old->ovbench_timestamp[4];
        new->ovbench_timestamp[5] = old->ovbench_timestamp[5];
        new->ovbench_timestamp[6] = old->ovbench_timestamp[6];
        new->ovbench_timestamp[7] = old->ovbench_timestamp[7];
        new->ovbench_timestamp[8] = old->ovbench_timestamp[8];
	new->ovbench_timestamp[9] = old->ovbench_timestamp[9];
	new->ovbench_timestamp[10] = old->ovbench_timestamp[10];
	new->ovbench_timestamp[11] = old->ovbench_timestamp[11];	
	new->ovbench_timestamp[12] = old->ovbench_timestamp[12];
	new->ovbench_timestamp[13] = old->ovbench_timestamp[13];
	new->ovbench_timestamp[14] = old->ovbench_timestamp[14];
	new->ovbench_timestamp[15] = old->ovbench_timestamp[15];

is added to __copy_skb_header.


and,
	if (OVTYPE (skb)) {
		timestamp_macro (skb) = rdtsc ();
	}
is added to iptunnel_xmit, ip_local_out_sk, dst_neigh_output, dev_queue_xmit,