On Fri, 12 Jun 2009, Navdeep Parhar wrote:

On Fri, Jun 12, 2009 at 10:56:31AM +0000, Bjoern A. Zeeb wrote:
On Fri, 12 Jun 2009, Pyun YongHyeon wrote:

Hi,

Yeah, there are no checksum offloading support for IPv6 under
FreeBSD so there are no cases the frames are IPv6 when
CSUM_IP/CSUM_TCP/CSUM_UDP/CSUM_TSO was set.

The thing that scared me was sys/netinet/tcp_subr.c:tcp_maxmtu6().

What I had missed was the CSUM_TSO6  (the 6 at the end) part.
grepping through the tree I am even wondering a lot more now when I
see what cxgb(4) is doing with that;)

I can't find a CSUM_TSO6 in head, did you mean IFCAP_TSO6?

yes I did.

cxgb(4)
will not let you enable IFCAP_TSO6 on the interface.  It has always
been disallowed as far as I can tell.

Yes, you have it in the logic bu you define it to 0;)
        #define IFCAP_TSO6 0x0

/bz

--
Bjoern A. Zeeb                      The greatest risk is not taking one.
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