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    SubjectRe: [PATCH 1/4] veth: move loopback logic to common location
    Arnd Bergmann wrote:
    > +int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
    > +{
    > + skb_orphan(skb);
    > +
    > + if (!(dev->flags & IFF_UP))
    > + return NET_RX_DROP;
    > +
    > + if (skb->len > (dev->mtu + dev->hard_header_len))
    > + return NET_RX_DROP;
    > +
    > + skb_dst_drop(skb);
    > + skb->tstamp.tv64 = 0;
    > + skb->pkt_type = PACKET_HOST;
    > + skb->protocol = eth_type_trans(skb, dev);
    > + skb->mark = 0;

    skb->mark clearing should stay private to veth since its usually
    supposed to stay intact. The only exception is packets crossing
    namespaces, where they should appear like a freshly received skbs.

    > + secpath_reset(skb);
    > + nf_reset(skb);
    > + return netif_rx(skb);
    > +}
    > +EXPORT_SYMBOL_GPL(dev_forward_skb);


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