net: introduce skb_transport_header_was_set()
We have skb_mac_header_was_set() helper to tell if mac_header
was set on a skb. We would like the same for transport_header.
__netif_receive_skb() doesn't reset the transport header if already
set by GRO layer.
Note that network stacks usually reset the transport header anyway,
after pulling the network header, so this change only allows
a followup patch to have more precise qdisc pkt_len computation
for GSO packets at ingress side.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b03fc0c..1e1b9ea 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -260,6 +260,7 @@
skb->end = skb->tail + size;
#ifdef NET_SKBUFF_DATA_USES_OFFSET
skb->mac_header = ~0U;
+ skb->transport_header = ~0U;
#endif
/* make sure we initialize shinfo sequentially */
@@ -328,6 +329,7 @@
skb->end = skb->tail + size;
#ifdef NET_SKBUFF_DATA_USES_OFFSET
skb->mac_header = ~0U;
+ skb->transport_header = ~0U;
#endif
/* make sure we initialize shinfo sequentially */