[Cake] [PATCH net-next] net: account for encap headers in qdisc pkt len

[Willem de Bruijn]

Fengyuan Gong wrote:
> Refine qdisc_pkt_len_init to include headers up through
> the inner transport header when computing header size
> for encapsulations. Also refine net/sched/sch_cake.c
> borrowed from qdisc_pkt_len_init().
> 
> Signed-off-by: Fengyuan Gong <gfengyuan at google.com>

Reviewed-by: Willem de Bruijn <willemb at google.com>