Hi Hal, On Tue, 31 Aug 2010 16:09:19 -0400 Hal Rosenstock <[email protected]> wrote:
> Hi, > > There appear to be two basic approaches to supporting DHCP (over > InfiniBand) in Linux. There's LPF support (4.1.1 based) and older > (3.0.4 based) socket support. > > The 4.1.1 LPF patches are: > http://lists.openfabrics.org/pipermail/ewg/2010-May/015265.html > http://lists.openfabrics.org/pipermail/ewg/2010-May/015266.html > http://lists.openfabrics.org/pipermail/ewg/2010-May/015264.html > The last being Matthieu Hautreux's <matthieu.hautreux at cea.fr> > improved XID generation (same as > https://lists.isc.org/mailman/htdig/dhcp-hackers/2009-January/001773.html). > > AFAIT an LPF based approach will only work on older kernels (due to > elimination of CONFIG_FILTER support). Is this accurate ? Where have you seen that the LPF approach does not work on recent kernels? AFAICR, the CONFIG_FILTER disappeared a long time ago. Unless I'm missing something, you only need the CONFIG_PACKET option. Sébastien. > > OFED has two patches for 3.0.4 for a socket approach in > http://www.openfabrics.org/git/?p=~tziporet/docs.git;a=tree;f=dhcp;h=aec68a2905559c8ed91f1157fa11d78cccb266cd;hb=ofed_1_5 > dhcp-3.0.4.patch > 0001-Make-DHCP-server-print-HW-info.patch > > I've been upporting those to a 4.x based DHCP and have a fundamental > question which occurs even with the 3.0.4 socket based version. On the > client machine, the DHCPOFFER in response to the DHCPDISCOVER is > received (seen with tcpdump) but never seems to make it to the > dhclient application. I can't see any kernel stack error counters > incremented so I'm mystified as to what could be going wrong. I've > also tried this on a number of different kernels. Any idea on why this > might be or how to figure out where that packet is going ? I do see > the dhcp client port with netstat -a --udp -n > udp 0 0 0.0.0.0:68 0.0.0.0:* > udp 0 0 0.0.0.0:68 0.0.0.0:* > Any idea on what I'm missing ? > > Also, is any of this work making it's way into a released DHCP ? > What's the process for this ? Is there some branch in a source > repository where this work is available ? > > Thanks in advance for any pointers on all this. > > -- Hal > _______________________________________________ > ewg mailing list > [email protected] > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ewg > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
