net: add skb_[inner_]tcp_all_headers helpers

Most drivers use "skb_transport_offset(skb) + tcp_hdrlen(skb)"
to compute headers length for a TCP packet, but others
use more convoluted (but equivalent) ways.

Add skb_tcp_all_headers() and skb_inner_tcp_all_headers()
helpers to harmonize this a bit.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: hns3: rename trace event hns3_over_8bd

Since the maximun BD number may not be 8 now, so rename
hns3_over_8bd() to hns3_over_max_bd().

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: hns3: add trace event support for HNS3 driver

This adds trace support for HNS3 driver. It also declares
some events which could be used to trace the events when a
TX/RX BD is processed, and other events which are related to
the processing of sk_buff, such as TSO, GRO.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>