Re: Logging of all scsi commands to a certain target?

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On Sat, Aug 23, 2014 at 04:54:55PM +0200, Hans de Goede wrote:
> Hi,
> 
> Now that the UAS driver is no longer marked as CONFIG_BROKEN,
> I'm getting quite a few bug reports about issues with UAS drives.
> 
> Some of these seem to be related to the scsi core and/or the sd
> driver sending a command the device does not like.
> 
> As such I'm wondering if there us a way to get the kernel
> to log each scsi command ? Or at least is there a helper
> function to log scsi commands which I can add to the uas driver
> (under a verbose option) to allow this ?

Enable the scsi_dispatch_cmd_start tracepoint using trace-cmd or
debugfs, and filter using host_no/channel/id/lun for your specific
device.  See Documentation/trace/events.txt for details on setting
up filters.

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