* Logging of all scsi commands to a certain target?
@ 2014-08-23 14:54 Hans de Goede
2014-08-23 15:48 ` Douglas Gilbert
2014-08-24 21:08 ` Christoph Hellwig
0 siblings, 2 replies; 3+ messages in thread
From: Hans de Goede @ 2014-08-23 14:54 UTC (permalink / raw)
To: SCSI development list
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 ?
Regards,
Hans
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Logging of all scsi commands to a certain target?
2014-08-23 14:54 Logging of all scsi commands to a certain target? Hans de Goede
@ 2014-08-23 15:48 ` Douglas Gilbert
2014-08-24 21:08 ` Christoph Hellwig
1 sibling, 0 replies; 3+ messages in thread
From: Douglas Gilbert @ 2014-08-23 15:48 UTC (permalink / raw)
To: Hans de Goede, SCSI development list
On 14-08-23 10:54 AM, 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 ?
Look for uses of this exported function:
void scsi_print_command(struct scsi_cmnd *cmd)
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Logging of all scsi commands to a certain target?
2014-08-23 14:54 Logging of all scsi commands to a certain target? Hans de Goede
2014-08-23 15:48 ` Douglas Gilbert
@ 2014-08-24 21:08 ` Christoph Hellwig
1 sibling, 0 replies; 3+ messages in thread
From: Christoph Hellwig @ 2014-08-24 21:08 UTC (permalink / raw)
To: Hans de Goede; +Cc: SCSI development list
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.
^ permalink raw reply [flat|nested] 3+ messages in thread
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