smp_utils: command line utilities for SAS expanders

[Kenneth D. Merry]

On Fri, Sep 02, 2011 at 12:00:05 -0400, Douglas Gilbert wrote:
> smp_utils is a package of command line utilities for
> accessing and controlling SAS expanders via the Serial
> Management Protocol (SMP). See this page:
>   http://sg.danny.cz/sg/smp_utils.html
> for more information.
> 
> This package was written for Linux and has been ported
> to FreeBSD (starting at smp_utils version 0.97b1). It
> uses the extensions to CAM added in late 2010 and only
> found in the yet to be released FreeBSD 9.0 .

Very cool!  Thank you for porting it!

> A quirk of
> the CAM extensions is that SAS expanders (more precisely
> SMP targets) are not visible in the user space. CAM
> assumes there will be a "twin" SES device (true for the
> SAS-2 expanders I have) on the same silicon as the
> expander. Hence invocations look like this:
>     smp_discover /dev/ses2

Yes, that is a shortcoming.  We have plans to put the expanders in the
topology, but at the moment, CAM doesn't have any SMP probe code.  So that
was the quickest way to make things work.

You can also send SMP commands to any device attached to an expander (e.g.
/dev/da5), and you should also get the information from the expander:

[root at storage-domain ~/smp_utils-0.97b1/src]# ./smp_discover /dev/da5 
  phy   0:S:attached:[50090a502ff80200:26 exp i(SMP) t(SMP)]  3 Gbps
  phy   1:S:attached:[50090a502ff80200:27 exp i(SMP) t(SMP)]  3 Gbps
  phy   2: inaccessible (phy vacant)
  phy   3: inaccessible (phy vacant)
  phy   4:T:attached:[5000c50026360ecd:00  t(SSP)]  3 Gbps
  phy   5:T:attached:[5000c50026360ece:01  t(SSP)]  3 Gbps
  phy   6:T:attached:[5000c50026360d5d:00  t(SSP)]  3 Gbps
  phy   7:T:attached:[5000c50026360d5e:01  t(SSP)]  3 Gbps
  phy   8:T:attached:[5000c500263cd829:00  t(SSP)]  3 Gbps
  phy   9:T:attached:[5000c500263cd82a:01  t(SSP)]  3 Gbps
  phy  10:T:attached:[5000c500263476b1:00  t(SSP)]  3 Gbps
  phy  11:T:attached:[5000c500263476b2:01  t(SSP)]  3 Gbps
  phy  12:T:attached:[5000c5002635fcd1:00  t(SSP)]  3 Gbps
  phy  13:T:attached:[5000c5002635fcd2:01  t(SSP)]  3 Gbps
  phy  14:T:attached:[5000c500263c532d:00  t(SSP)]  3 Gbps
  phy  15:T:attached:[5000c500263c532e:01  t(SSP)]  3 Gbps
  phy  16:T:attached:[5000c500263d603d:00  t(SSP)]  3 Gbps
  phy  17:T:attached:[5000c500263d603e:01  t(SSP)]  3 Gbps
  phy  18:T:attached:[5000c500261d1099:00  t(SSP)]  3 Gbps
  phy  19:T:attached:[5000c500261d109a:01  t(SSP)]  3 Gbps
  phy  20:T:attached:[5000c500263cd089:00  t(SSP)]  3 Gbps
  phy  21:T:attached:[5000c500263cd08a:01  t(SSP)]  3 Gbps
  phy  22:T:attached:[5000c50026360329:00  t(SSP)]  3 Gbps
  phy  23:T:attached:[5000c5002636032a:01  t(SSP)]  3 Gbps
  phy  24:D:attached:[50090a502ff80619:00  V i(SSP) t(SSP)]  3 Gbps


> camcontrol has been extended in FreeBSD 9.0 to access
> some SMP functions. smp_utils version 0.97b1 supports
> all functions defined in SAS-2 (up until the lastest
> draft: spl2r02.pdf) and that includes zoning support.

Excellent!  That will come in handy especially when we get around to doing
the multipathing work in CAM and adding SMP devices to the topology.

Thanks again for doing the work.

> Doug Gilbert
> 
> 
> P.S. For at least the last 3 years I have been unable to
> post to this list. The postmaster at freebsd.org informed
> me that my email domain was blacklisted. Not bad for a
> grand-fathered email domain that probably hasn't added
> a new email account in 10 years! FreeBSD's blacklisting
> probably dates from a period when some crazy service in
> the US identified every major and minor Canadian email
> domain as full of spammers. So anyone else who feels
> they have been blacklisted, contact the postmaster.

Not good, but I'm glad things are cleared up now.

Ken
-- 
Kenneth Merry
ken at FreeBSD.ORG