Date: Tue, 31 Aug 2004 21:31:58 -0500 (EST) From: Sam <sah@softcardsystems.com> To: Peter Wemm <peter@wemm.org> Cc: freebsd-arch@freebsd.org Subject: Re: option directive and turning on AOE Message-ID: <Pine.LNX.4.60.0408312126180.10238@athena> In-Reply-To: <200408311709.32927.peter@wemm.org> References: <Pine.LNX.4.60.0408311611550.7530@athena> <20040831203929.GB25134@odin.ac.hmc.edu> <4134FB98.6A3822BC@freebsd.org> <200408311709.32927.peter@wemm.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 31 Aug 2004, Peter Wemm wrote: > On Tuesday 31 August 2004 03:28 pm, Andre Oppermann wrote: >> Brooks Davis wrote: >>> On Tue, Aug 31, 2004 at 02:27:33PM -0600, Scott Long wrote: >>>> Sam wrote: >>>>> I've added code to if_ethersubr.c:/ether_demux/ >>>>> to queue up AoE frames as they appear. I followed >>>>> suit with other protocols and included my addition >>>>> inside of an #ifdef AOE. Where do I turn this on? >>>>> I thought perhaps just adding an 'option AOE' to >>>>> the config would do it, but it doesn't -- so clearly >>>>> I don't understand how the option directive works. >>>>> The config man page doesn't talk about option/device >>>>> directives ... >>>>> >>>>> I'm still looking, but a clue would be well received. >>>> >>>> Did you modify /sys/conf/options to tell it about your >>>> AOE option? If so, then you should have specified the name >>>> of a header file that the option would be #define'd into. >>>> Include that header file in if_ethersubr.c and you should >>>> have no problems. >>>> >>>> Incidentally, this might be an area when netgraph would be >>>> useful. Instead of having an AoE specific hook in the >>>> stack, you could have an AoE netgraph module that uses the >>>> existing netgraph hooks. It's just an idea, though. >>> >>> Another option might be a PFIL hook. There isn't one there now, >>> but I think I've seen talk of adding one. Actually, if we did >>> that, we could get most of the netgraph specific hooks out of the >>> ethernet code. >> >> What is AoE? And what kind of Frames does it come in? > > ATA-over-Ethernet? > http://news.gw.com/freebsd.arch/12939 > (Ethernet frame type 0x88a2 apparently) > -- Yes, that is correct. It is a very simple RPC protocol for packaging up ATA commands and sending them over Ethernet to a server that will issue them to its attached device. I can supply the protocol to anyone who is interested (8 pages), just shoot me an e-mail. In case you're wondering why: http://www.coraid.com. Sam
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.LNX.4.60.0408312126180.10238>