On 13-05-17 07:53 PM, ronnie sahlberg wrote:
Martin,
Thansk for your suggestions.
On Tue, May 14, 2013 at 3:43 PM, Martin K. Petersen
<martin.peter...@oracle.com> wrote:
"Ronnie" == ronnie sahlberg <ronniesahlb...@gmail.com> writes:
...
Ronnie> I have added tests for the block limits VPD as
Ronnie> SCSI.Inquiry.InquiryBlockLimits. It checks that the pagelength
Ronnie> is valid. 3C if SBC3 is claimed and 0C if prior to SBC3.
Well, there are devices out there that claim SPC3/SBC2 compliance but do
support some of the newer features from SPC4/SBC3.
In this case I'd rely on the supported VPD page list. And if the BL VPD
is present and the device reports SPC3/SBC2 I'd print a warning.
I have updated the tests so that IF the device claims SBC-3 then the
SBC-3 page of pagelength 0x3c must be present.
If the device is not SBC-3, then I allow either the SBC-2 version of
the page that is 0x0c in length OR the SBC-3 version.
If the device returns a SBC-3 style page without claiming SBC-3
support I print a warning but allow the test to pass.
This is now part of the test --test SCSI.Inquiry.InquiryBlockLimits
Ronnie> The other fields I had a hard time to come up with good sanity
Ronnie> tests for. Any suggestions ? Do you have examples of things
Ronnie> that vendors get wrong here ?
Maximum Write Same Length vs. support for WS10 and WS16.
Another interesting Write Same test: I have several devices that support
WS16 but which only support a 2-byte block count in WS16. I.e. you get
the larger LBA but not a bigger block count with WS16.
I have added tests to verify that WS16 supports >16 bit block count.
I also added tests that both WS10 and WS16 support >8 bit block counts.
These are part of:
--test SCSI.WriteSame10.WriteSame10Unmap
--test SCSI.WriteSame16.WriteSame16Unmap
Could you check if these tests catch the devices that you have that
had problem in this area?
There's also the Logical Block Provisioning VPD page. You could verify
that UNMAP is supported when LBPU=1. Repeat for LBPWS and LBPWS10.
I added tests that IF UNMAP works, then both LBPU and LPBME must be clear.
Analog for WS10/WS16.
If either of them does not work, then I check that the corresponding
LBPU/LBPWS10/LBPWS flags are clear.
This is tested in
--test SCSI.Unmap.UnmapVPD
--test SCSI.WriteSame10.WriteSame10UnmapVPD
--test SCSI.WriteSame16.WriteSame16UnmapVPD
You could verify that the device actually returns zeroes when LBPRZ=1.
Tested in
--test SCSI.Unmap.Unmap
--test SCSI.WriteSame10.WriteSame10Unmap
--test SCSI.WriteSame16.WriteSame16Unmap
Ronnie> I will add tests for when protection information is enabled in
Ronnie> the future, I will need to find time to add it to tgt first.
I have a fairly extensive set of PI tests in my test suite. But that
gets pretty involved. We can deal with those later.
I would love to implement those tests in my testsuite, but that is
probably not near future since I would have to add support for PI to
both wireshark and tgtd first.
Other tests you would like to see in the test tool ?
Hi,
If you are working in the WRITE SAME (WS) area, you could make
this addition: T10/Robert Elliott just added a NDOB bit
('no data-out buffer') to WS(16) and WS(32) in sbc3r35d.pdf .
Using it vastly simplifies my sg_write_same code but I don't
understand why NDOB=1,UNMAP=0 is disallowed.
Doug Gilbert
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
