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

[Fengyuan Gong]

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>
---
 net/core/dev.c       | 5 ++++-
 net/sched/sch_cake.c | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 11da1e272ec20..dfec541f68e3a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3944,7 +3944,10 @@ static void qdisc_pkt_len_init(struct sk_buff *skb)
 		unsigned int hdr_len;
 
 		/* mac layer + network layer */
-		hdr_len = skb_transport_offset(skb);
+		if (!skb->encapsulation)
+			hdr_len = skb_transport_offset(skb);
+		else
+			hdr_len = skb_inner_transport_offset(skb);
 
 		/* + transport layer */
 		if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))) {
diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
index 48dd8c88903fe..dbcfb948c8670 100644
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -1407,7 +1407,10 @@ static u32 cake_overhead(struct cake_sched_data *q, const struct sk_buff *skb)
 		return cake_calc_overhead(q, len, off);
 
 	/* borrowed from qdisc_pkt_len_init() */
-	hdr_len = skb_transport_offset(skb);
+	if (!skb->encapsulation)
+		hdr_len = skb_transport_offset(skb);
+	else
+		hdr_len = skb_inner_transport_offset(skb);
 
 	/* + transport layer */
 	if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 |
-- 
2.50.0.727.gbf7dc18ff4-goog