Messages in this thread | | | Date | Tue, 8 Mar 2022 15:51:32 -0700 | Subject | Re: [PATCH v3 net-next] net-core: add rx_otherhost_dropped counter | From | David Ahern <> |
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On 3/8/22 2:25 PM, Jeffrey Ji wrote: > diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c > index 95f7bb052784..8b87ea99904b 100644 > --- a/net/ipv4/ip_input.c > +++ b/net/ipv4/ip_input.c > @@ -451,6 +451,7 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net) > * that it receives, do not try to analyse it. > */ > if (skb->pkt_type == PACKET_OTHERHOST) { > + atomic_long_inc(&skb->dev->rx_otherhost_dropped); > drop_reason = SKB_DROP_REASON_OTHERHOST; > goto drop; > } > diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c > index 5b5ea35635f9..5624c937f87f 100644 > --- a/net/ipv6/ip6_input.c > +++ b/net/ipv6/ip6_input.c > @@ -150,6 +150,7 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev, > struct inet6_dev *idev; > > if (skb->pkt_type == PACKET_OTHERHOST) { > + atomic_long_inc(&skb->dev->rx_otherhost_dropped); > kfree_skb(skb); > return NULL; > }
that's an expensive packet counter for a common path (e.g., hosting environments).
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