On 2/21/17, 1:12 PM, "ovs-dev-boun...@openvswitch.org on behalf of Flavio 
Leitner" <ovs-dev-boun...@openvswitch.org on behalf of f...@sysclose.org> wrote:

    On Thu, Feb 16, 2017 at 12:47:35AM -0800, Darrell Ball wrote:
    > This patch introduces NAT support for the userspace datapath.
    > The conntrack module changes are in this patch.
    > 
    > The per packet scope of lookups for NAT and un_NAT is at
    > the bucket level rather than global. One hash table is
    > introduced to support create/delete handling. The create/delete
    > events may be further optimized, if the need becomes clear.
    > 
    > Some NAT options with limited utility (persistent, random) are
    > not supported yet, but will be supported in a later patch.
    > 
    > Signed-off-by: Darrell Ball <dlu...@gmail.com>
    
    
    It works for me :-)
    I was worried with the two memcpy() in sequence in nat_packet()
    but turns out that gcc is smart enough to optimize them.

Thanks for pointing this out.
I removed the unnecessary memcpy and associated local variable in all
these instances.
Fortuitously, while looking at the associated code, I noticed the V6 DNAT
address replacement had a “.dst.” instead of a “.src.”.
I fixed it.
I added a new V6 DNAT test to cover this case.
    
    Another thing is use of OVS_NO_THREAD_SAFETY_ANALYSIS, but it
    doesn't look like fixing it will get any better.
    
    There are some unrelated changes like cleanups or code movement
    in process_one(), but that's fine I guess.
    
    Acked-by: Flavio Leitner <f...@sysclose.org>
    
    
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