Re: iSCSI request keep rejected by microsoft iSCSI target because of write_same check

[Mike Christie <michaelc-hcNo3dDEHLuVc3sceRu5cw@public.gmane.org>]

On 12/2/14, 9:09 PM, Martin K. Petersen wrote:
>>>>>> "Mike" == Michael Christie <michaelc-hcNo3dDEHLuVc3sceRu5cw@public.gmane.org> writes:
>
> Mike,
>
> Mike> This was the issue we worked with Microsoft on wasn’t it? You guys
> Mike> figured out it was fixed in their target in a recent release
> Mike> right?
>
> The issue we worked recently was wrt. the thin provisioning reporting.
>
> The WRITE SAME problem was that the target returns an iSCSI-specific
> error code rather than a check condition with ILLEGAL REQUEST. You were
> going to talk to MS.

Are you sure about this? The issue you are talking about and the one 
jazz is is the same issue right?

I do not have any of the old replies from MS, but I have some of the 
mails I sent them. It looks like we were asking them about when sd.c 
would send a REPORT SUPPORTED OPERATION, the old MS target would return 
the iscsi specific error code. And it looks like they had us try a 
updated version and in there it was changed to just work on their side.

Jazz-jYkeLfz6glqHXe+LvDLADg@public.gmane.org's patch would work around the same problem because in 
sd_read_write_same, sd would see no_write_same is set and not send 
REPORT SUPPORTED OPERATION.

The subject of that email thread with MS was "Linux iSCSI and Microsoft 
target interop question". I started it with MS on Jan 14, 2014. Vaughan 
ccd you on that thread a little later to get your help. I do not have 
the replies though. I am just going by truncated snippets in mails sent, 
so I do not know what version that was fixed in. Do you guys have the 
replies by any chance?

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