[ewg] crash system when srp targets are loaded

[Bart Van Assche]

As far as I can see the ib_srp source code in OFED-3.5 is identical to
what's present in the upstream Linux kernel 3.2. That means that the
current OFED 3.5 ib_srp driver can't work on RHEL 6.x since the RHEL 6.x
SCSI LLD API is different from the Linux kernel 3.2 SCSI LLD API.

A quote from the Linux kernel 3.2 include file <scsi/scsi_host.h>:

        int (* queuecommand)(struct Scsi_Host *, struct scsi_cmnd *);

A quote from the RHEL 6.3 include file <scsi/scsi_host.h>:

        /*
         * [ ... ]
         * NOTE: The 'lockless' flag in the scsi_host_template indicates
         * whether the host_lock should be held before calling this
         * routine. Also, the lockless queuecommand, as implemented
         * upstream has a different signature.
         */
        int (* queuecommand)(struct scsi_cmnd *,
                             void (*done)(struct scsi_cmnd *));
[ ... ]
        /*
         * True if we are calling queuecommand without the
         * host_lock held. LLDs may want to do this for
         * performance reasons.
         */
        unsigned lockless:1;

Bart.

On 09/09/12 04:36, Rupert Dance wrote:
> Hello,
> 
> UNH-IOL has verified the same problem using SL 6.2 and SL 6.3. There have
> been two bugs filed in OFA Bugzilla:
> 
> Bug 2374: http://bugs.openfabrics.org/bugzilla/show_bug.cgi?id=2374
> 
> Bug 2378: http://bugs.openfabrics.org/bugzilla/show_bug.cgi?id=2378
> 
> It is important to the industry and the end users that this be resolved
> before OFED 3.5 RC2 is released. We also have an OFA Interop debug event
> scheduled for a month from now that will depend on OFED 3.X
> 
> Thank you,
> 
> Rupert Dance
> 
> 
> -----Original Message-----
> From: ewg-bounces at lists.openfabrics.org
> [mailto:ewg-bounces at lists.openfabrics.org] On Behalf Of Shuichi Ihara
> Sent: Saturday, September 08, 2012 10:28 PM
> To: ewg at lists.openfabrics.org
> Subject: [ewg] crash system when srp targets are loaded
> 
> 
> Hi,
> 
> I'm testing SRP initiator with OFED-3.5 (OFED-3.5-20120831-0600.tgz), but
> once SRP targets are loaded, system crashed. This is reproducable.
> I filed this problem on bugzilla a week ago and submitted backtrace logs as
> well.
> http://bugs.openfabrics.org/bugzilla/show_bug.cgi?id=2374
> 
> Dose anyone have a look at it and advise please?
> 
> Thanks
> Ihara
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