Right now, skb->tstamp is reset to 0 whenever the skb is forwarded.
If skb->tstamp has the mono delivery_time, clearing it can hurt
the performance when it finally transmits out to fq@phy-dev.
The earlier patch added a skb->mono_delivery_time bit to
flag the skb->tstamp carrying the mono delivery_time.
This patch adds skb_clear_tstamp() helper which keeps
the mono delivery_time and clears everything else.
The delivery_time clearing will be postponed until the stack knows the
skb will be delivered locally. It will be done in a latter patch.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
skb_tx_timestamp(skb);
/* do not fool net_timestamp_check() with various clock bases */
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
skb_orphan(skb);
skb->mono_delivery_time = 0;
}
+static inline void skb_clear_tstamp(struct sk_buff *skb)
+{
+ if (skb->mono_delivery_time)
+ return;
+
+ skb->tstamp = 0;
+}
+
static inline u8 skb_metadata_len(const struct sk_buff *skb)
{
return skb_shinfo(skb)->meta_len;
#ifdef CONFIG_NET_REDIRECT
skb->from_ingress = from_ingress;
if (skb->from_ingress)
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
#endif
}
int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
return NF_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING,
net, sk, skb, NULL, skb->dev,
br_dev_queue_push_xmit);
}
skb->dev = dev;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
dev_xmit_recursion_inc();
ret = dev_queue_xmit(skb);
}
skb->dev = dev;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) {
skb = skb_expand_head(skb, hh_len);
}
skb->dev = dev;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) {
skb = skb_expand_head(skb, hh_len);
ipvs_reset(skb);
skb->mark = 0;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
}
EXPORT_SYMBOL_GPL(skb_scrub_packet);
if (unlikely(opt->optlen))
ip_forward_options(skb);
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
return dst_output(net, sk, skb);
}
}
#endif
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
return dst_output(net, sk, skb);
}
nf_reset_ct(skb);
skb_forward_csum(skb);
if (skb->dev)
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
}
return ret;
}
if (!local) {
skb_forward_csum(skb);
if (skb->dev)
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
NF_HOOK(pf, NF_INET_LOCAL_OUT, cp->ipvs->net, NULL, skb,
NULL, skb_dst(skb)->dev, dst_output);
} else
ip_vs_drop_early_demux_sk(skb);
skb_forward_csum(skb);
if (skb->dev)
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
NF_HOOK(pf, NF_INET_LOCAL_OUT, cp->ipvs->net, NULL, skb,
NULL, skb_dst(skb)->dev, dst_output);
} else
skb_push(skb, skb->mac_len);
skb->dev = dev;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
dev_queue_xmit(skb);
}
nf_flow_nat_ip(flow, skb, thoff, dir, iph);
ip_decrease_ttl(iph);
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
if (flow_table->flags & NF_FLOWTABLE_COUNTER)
nf_ct_acct_update(flow->ct, tuplehash->tuple.dir, skb->len);
nf_flow_nat_ipv6(flow, skb, dir, ip6h);
ip6h->hop_limit--;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
if (flow_table->flags & NF_FLOWTABLE_COUNTER)
nf_ct_acct_update(flow->ct, tuplehash->tuple.dir, skb->len);
return;
skb->dev = dev;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
neigh_xmit(neigh_table, dev, addr, skb);
out:
regs->verdict.code = verdict;
}
skb->dev = vport->dev;
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
vport->ops->send(skb);
return;
static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
{
- skb->tstamp = 0;
+ skb_clear_tstamp(skb);
skb->pkt_type = PACKET_HOST;
skb->skb_iif = 0;
skb->ignore_df = 0;