• Herbert Xu's avatar
    [UDP]: Clean up UDP-Lite receive checksum · 759e5d00
    Herbert Xu authored
    This patch eliminates some duplicate code for the verification of
    receive checksums between UDP-Lite and UDP.  It does this by
    introducing __skb_checksum_complete_head which is identical to
    __skb_checksum_complete_head apart from the fact that it takes
    a length parameter rather than computing the first skb->len bytes.
    
    As a result UDP-Lite will be able to use hardware checksum offload
    for packets which do not use partial coverage checksums.  It also
    means that UDP-Lite loopback no longer does unnecessary checksum
    verification.
    
    If any NICs start support UDP-Lite this would also start working
    automatically.
    
    This patch removes the assumption that msg_flags has MSG_TRUNC clear
    upon entry in recvmsg.
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    759e5d00
udplite.h 3.48 KB