[stgt] RFC [patch] README.passthrough v1 (2nd send)

[Nicholas A. Bellinger]

On Wed, 2010-08-18 at 19:44 +1000, Mark Harvey wrote:
> Nicholas A. Bellinger wrote:
> > On Tue, 2010-08-17 at 21:41 +1000, Mark Harvey wrote:
> >   
> >> I've also attached the patch as well as inline.
> >>
> >> Cheers
> >> Mark
> >>
> >> >From 07e7587991912d9225f2b273d140558048157b7d Mon Sep 17 00:00:00 2001
> >> From: Mark Harvey <markh794 at gmail.com>
> >> Date: Fri, 6 Aug 2010 17:06:51 +1000
> >> Subject: Initial documentation for configuring passthrough mode
> >>
> >> Signed-off-by: Mark Harvey <markh794 at gmail.com>
> >> ---
> >>  doc/README.passthrough |  190 ++++++++++++++++++++++++++++++++++++++++++++++++
> >>  1 files changed, 190 insertions(+), 0 deletions(-)
> >>
> >>     
> >
> > Mark,
> >
> > I just wanted to say thanks for putting these docs together for STGT
> > SG_IO passthrough.   Good work!
> >
> > I did notice that they where missing a mention of the BSG passthrough,
> > which functions more or else exactly the same aside from --bstype=bsg
> > and of course a proper BSG path.  Would you mind adding a small section
> > to your docs for this too..?
> >
> > Best,
> >
> > --nab
> >   
> Thanks for the feedback.
> 
> I'll make the changes.
> 
> Do you / can you advise on the requirement to get 'bsg' working ?
> 
> I'm running Ubuntu x86_64 (2.6.31-22-generic #61-Ubuntu SMP) kernel - 
> Hopefully that's late enough for bsg.
> $ ls -l /dev/bsg*
> ls: cannot access /dev/bsg*: No such file or directory
> 

Hmmm strange..  Checking on Fedora 11 (v2.6.30), RHEL6 B1 (v2.6.32),
OpenSuse 11.2 (v2.6.31), SLES 11 (v2.6.27), and Debian Lenny VMs
(v2.6.35 from lio-core-2.6.git/lio-4.0), and I do see the
proper /dev/bsg/H:C:T:L device nodes matching the available struct
scsi_device.

However, I do recall one seing the BSG H:C:T:L device nodes appear
in /dev/ instead of /dev/bsg/ before.  I don't recall on which
environment this was, but I think it may have been some version of
Ubuntu..?

Just to double check on your system, a 'cat /proc/kallsyms | grep bsg'
produces symbols for the kernel built-in BSG kernel code, yes..?

Best,

--nab

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