Date: Fri, 12 Jun 2009 13:43:36 -0400 From: Andrew Gallatin <gallatin@cs.duke.edu> To: "Bjoern A. Zeeb" <bz@FreeBSD.org> Cc: Pyun YongHyeon <pyunyh@gmail.com>, FreeBSD net mailing list <freebsd-net@FreeBSD.org>, "George V. Neville-Neil" <gnn@FreeBSD.org>, Michael Tuexen <tuexen@FreeBSD.org>, Navdeep Parhar <np@FreeBSD.org>, Andrew Thompson <thompsa@FreeBSD.org>, Jack F Vogel <jfv@FreeBSD.org>, Andrew Gallatin <gallatin@FreeBSD.org>, Pyun YongHyeon <yongari@FreeBSD.org> Subject: Re: Ethernet NIC drivers depending unconditionally on INET Message-ID: <4A3293C8.5070101@cs.duke.edu> In-Reply-To: <20090612173728.B22887@maildrop.int.zabbadoz.net> References: <20090611184555.J22887@maildrop.int.zabbadoz.net> <20090612013406.GB72855@michelle.cdnetworks.co.kr> <20090612100900.M22887@maildrop.int.zabbadoz.net> <20090612170703.GA994@hub.freebsd.org> <20090612173728.B22887@maildrop.int.zabbadoz.net>
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Bjoern A. Zeeb wrote: > 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 So I guess TSO6 has never been tested at all on any interface on Freebsd. Is this true? Drew
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