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Re: [dm-devel] [PATCH] multipath: Evaluate request result and sense code



Hannes Reinecke wrote:
As we now see the result for every command we
can use it to make some more elaborate choices
if we should retry the request on another path.

This solves a potential data corruption when
a request is being terminated with RESERVATION
CONFLICT and queue_if_no_path is active; the
request will be queued until the reservation
status changes and then transmitted.


I had the same bz. To handle it I just converted the error to some other -EXYZ value. But like I said in my patch that I sent to the list I did not like it much.

I thought of going the route you did in this patch, but thought it was too scsi specific. Does dasd want advanced error handling? If not, then I am fine since for hw handlers we assume they are always scsi_dh modules.


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