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    • H
      [NET]: Merge TSO/UFO fields in sk_buff · 7967168c
      Herbert Xu 提交于
      Having separate fields in sk_buff for TSO/UFO (tso_size/ufo_size) is not
      going to scale if we add any more segmentation methods (e.g., DCCP).  So
      let's merge them.
      
      They were used to tell the protocol of a packet.  This function has been
      subsumed by the new gso_type field.  This is essentially a set of netdev
      feature bits (shifted by 16 bits) that are required to process a specific
      skb.  As such it's easy to tell whether a given device can process a GSO
      skb: you just have to and the gso_type field and the netdev's features
      field.
      
      I've made gso_type a conjunction.  The idea is that you have a base type
      (e.g., SKB_GSO_TCPV4) that can be modified further to support new features.
      For example, if we add a hardware TSO type that supports ECN, they would
      declare NETIF_F_TSO | NETIF_F_TSO_ECN.  All TSO packets with CWR set would
      have a gso_type of SKB_GSO_TCPV4 | SKB_GSO_TCPV4_ECN while all other TSO
      packets would be SKB_GSO_TCPV4.  This means that only the CWR packets need
      to be emulated in software.
      Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7967168c
  16. 18 6月, 2006 1 次提交
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  19. 24 5月, 2006 1 次提交