Ang: Re: [Stgt-devel] Re: [Iscsitarget-devel] stgt a new version of iscsi target?
vst at vlnb.net
Sat Dec 10 16:30:51 CET 2005
Mike Christie wrote:
>> But there are other cleanups like moving some of the state to per
>> target, cleaningup the scattlist allocation code and moving it to
>> scsi-ml so the SCSI ULDs can use them and convert them. There is also
>> thing like converting to the right APIs for 2.6 (rm kernel_thread, rm
>> scsi_request, rm proc, fixup class interface refcouting problems,
>> fixup scsi_device lack of refcounting usage, etc).
> Oh yeah I think the other major issue at least I had with scst was that
> it was scsi specific and we wanted try and seperate things so if drivers
> like IET and vscsi are allowed then we could also do other drivers like
> a ATA over ethernet target driver or allow any other target driver that
> wanted to to hook in. I think you noted that we were spererating some
> protocol specific things as a distadvantage or mentioned it for some
> reason but I am not completely sure why and we may not agree on that
> issue too.
SCSI has a lot of very specific stuff like UA handling and (at least)
some parts of task management, especially if we consider honoring NACA,
QErr, TST, UA_INTLCK_CTRL bits, therefore I'm not sure that to have
common target parts for other protocols worths complicating the
mid-layer with code and interfaces that will separate SCSI-specifics
from non-SCSI protocols. So, good luck with it :-)
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