From d98d58a002619b5c165f1eedcd731e2fe2c19088 Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Wed, 2 Mar 2022 11:55:50 -0800 Subject: net: Set skb->mono_delivery_time and clear it after sch_handle_ingress() The previous patches handled the delivery_time before sch_handle_ingress(). This patch can now set the skb->mono_delivery_time to flag the skb->tstamp is used as the mono delivery_time (EDT) instead of the (rcv) timestamp and also clear it with skb_clear_delivery_time() after sch_handle_ingress(). This will make the bpf_redirect_*() to keep the mono delivery_time and used by a qdisc (fq) of the egress-ing interface. A latter patch will postpone the skb_clear_delivery_time() until the stack learns that the skb is being delivered locally and that will make other kernel forwarding paths (ip[6]_forward) able to keep the delivery_time also. Thus, like the previous patches on using the skb->mono_delivery_time bit, calling skb_clear_delivery_time() is not limited within the CONFIG_NET_INGRESS to avoid too many code churns among this set. Signed-off-by: Martin KaFai Lau Signed-off-by: David S. Miller --- include/linux/skbuff.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 8e8a4af4f9e2..0f5fd53059cd 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3993,8 +3993,7 @@ static inline void skb_set_delivery_time(struct sk_buff *skb, ktime_t kt, bool mono) { skb->tstamp = kt; - /* Setting mono_delivery_time will be enabled later */ - skb->mono_delivery_time = 0; + skb->mono_delivery_time = kt && mono; } DECLARE_STATIC_KEY_FALSE(netstamp_needed_key); -- cgit v1.2.3