Re: tcm IBMVSCSIS driver

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On Mon, 01 Nov 2010 14:46:56 -0700
"Nicholas A. Bellinger" <nab@xxxxxxxxxxxxxxx> wrote:

> On Mon, 2010-11-01 at 21:56 +0900, FUJITA Tomonori wrote:
> > On Sat, 30 Oct 2010 16:05:43 -0700
> > "Nicholas A. Bellinger" <nab@xxxxxxxxxxxxxxx> wrote:
> > 
> > > One final question in that regard is in your ibmvscsis_queuecommand()
> > > code, only INQUIRY, REPORT_LUNS, and MODE_SENSE need to be handled
> > > specially for other non Linux VIO SRP Initiator guests on the other
> > > end..
> > 
> > INQUIRY and REPORT_LUNS need the special responses. Otherwise the
> > initiators can't see the logical units.
> > 
> 
> There also appears to be a bunch of magic bits set for MODE_SENSE as
> well and seems to indicate a hard requirement for legacy non linux
> guests, yes..?

No, see ibmvio.c in tgt's user space code.


> Also wrt to the internal REPORT_LUNs emuation, is it just the LUN
> encoding that is specific to ibmvscsis..?  I am wondering if can just
> add a operation TCM fabric module TFO op for individual struct
> se_lun->unmapped_lun -> REPORT_LUN payload encode, and drop this
> internal emulation code.

Yeah.
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