On Aug 17 Chris Boot wrote: > Now that we have a nice SCSI target framework in the kernel, and drivers > either in-tree or being worked on for iSCSI, FC, FCoE, SAS and iSER, I > was wondering about the possibility of adding FireWire to that list. > Apple Macs have had a FireWire Target Disk mode for a long time, and Side note: This target mode is a feature of their OpenFirmware and EFI firmwares, not of the Mac OS and the OS X. Though both firmware- and operating-system-implemented SBP-2 targets certainly have their use cases. Aside from the SBP-2 target in Macs and from Oracle Endpoint, I only know of SBP-2 targets that are built upon dedicated bus bridge silicon. > there is even a program called Endpoint[1] that apparently does this on > Linux though it looks completely untouched since 2003 and no longer > works as it depends on the old FireWire stack. It can be made to work again if it and libraw1394 are slightly extended to use a different API for Configuration ROM changes. Or Endpoint could be ported from libraw1394 to <linux/firewire-cdev.h>. But then it would of course not benefit from the generic SCSI target infrastructure, e.g. WRT administration, backing storage choices, or command set support. > I would very much like to see something like this added to the kernel, > and would very much like to contribute to writing this feature. However > my kernel development knowledge is very limited indeed so this would > require a lot hand-holding and mentoring. > > What's the interest in such a feature? People keep asking for it; very infrequently though. > Would anyone be able to give some (a lot?) of their time to help write > this? > > Thanks, > Chris > > [1] http://oss.oracle.com/projects/endpoint/ I for one can answer questions about firewire-core's driver API but do not have much spare time for more, for the time being. BTW, a kernelspace SBP-2 target drivers would use several of the FireWire features that the firewire-net driver uses too. So the sources of that driver may be of help where the firewire-core kerneldoc comments are missing or are not providing the bigger picture. -- Stefan Richter -=====-==-== =--- =---= http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
