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/include/linux/skbuff.h b/include/linux/skbuff.h
index 320e976..8b2256e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1492,6 +1492,11 @@
skb->inner_network_header += offset;
}
+static inline bool skb_transport_header_was_set(const struct sk_buff *skb)
+{
+ return skb->transport_header != ~0U;
+}
+
static inline unsigned char *skb_transport_header(const struct sk_buff *skb)
{
return skb->head + skb->transport_header;
@@ -1580,6 +1585,11 @@
skb->inner_network_header = skb->data + offset;
}
+static inline bool skb_transport_header_was_set(const struct sk_buff *skb)
+{
+ return skb->transport_header != NULL;
+}
+
static inline unsigned char *skb_transport_header(const struct sk_buff *skb)
{
return skb->transport_header;