caabd859c4
It is useful to expose skb addr and sock addr to user in tracepoint tcp_probe, so that we can get more information while monitoring receiving of tcp data, by ebpf or other ways. For example, we need to identify a packet by seq and end_seq when calculate transmit latency between layer 2 and layer 4 by ebpf, but which is not available in tcp_probe, so we can only use kprobe hooking tcp_rcv_established to get them. But we can use tcp_probe directly if skb addr and sock addr are available, which is more efficient. Signed-off-by: fuyuanli <fuyuanli@didiglobal.com> Reviewed-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>