bin/150723: bsnmpd(1): add knowledge of "ada" disks (ATA via SCSI CAM)

[Jeremy Chadwick]

On Thu, Sep 23, 2010 at 07:11:35PM +0300, Shteryana Shopova wrote:
> I am seeing a similar problem with removable USB disks - libdevinfo(3)
> reports that the name of the device is umass0 and as a result the disk
> name da0 does not match the device entry. Thus I also see the same
> "snmpd[3632]: disk_OS_get_disks: device 'da0' not in device list"
> messages in the system log. In addition two entries are present for
> the disk in the hrDeviceTable -
> 
> hrDeviceDescr[57] = umass0: Kingston DataTraveler 2.0, clas
> hrDeviceDescr[154] = da0:
> 
> As I don't have an "ada" disk to test with, could you please show me
> the output of
> 
> #devinfo -v
> #camcontrol devlist -v
> 
> and also the complete output when walking the hrDeviceTable on your system.

No problem.  Due to the amount of output, I felt it'd be prudent to put
them up on the web for easier review.  Here you go:

http://jdc.parodius.com/freebsd/150723/camcontrol.txt
http://jdc.parodius.com/freebsd/150723/devinfo.txt
http://jdc.parodius.com/freebsd/150723/snmpwalk.txt

It's interesting that the adaX disks don't show up in devinfo.

On a different system where ahci.ko and SCSI CAM *is not* in use,
devinfo shows the disks (ad4 and ad6) under their appropriate ataX
devices.  Sadly I don't have any native SCSI (non-AHCI) systems, so I
can't see if disks there appear correctly -- but from your experience,
it sounds like they don't.

Furthermore, it appears the FreeNAS folks also see this problem (scroll
down near the bottom):

http://sourceforge.net/apps/phpbb/freenas/viewtopic.php?f=57&t=1001

I'm adding mav@ to the CC list since he might have some ideas regarding
the issue.  It sounds like CAM(4) might not be doing something it
should (maybe with devclass(9)?  I'm just guessing).

-- 
| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |