Messages in this thread | | | Date | Mon, 30 Aug 2010 14:39:12 +0200 | From | Hannes Reinecke <> | Subject | Re: [RFC] training mpath to discern between SCSI errors |
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Sergei Shtylyov wrote: > Hello. > > Hannes Reinecke wrote: > >> Actually, I think we have two separate issues here: >> 1) The need of having more detailed I/O errors even in the fs layer. This >> we've already discussed at the LSF, consensus here is to allow other >> errors than just 'EIO'. >> Instead of Mike's approach I would rather use existing error codes >> here; >> this will make the transition somewhat easier. >> Initially I would propose to return 'ENOLINK' for a transport failure, >> 'EIO' for a non-retryable failure on the target, and 'ENODEV' for a >> retryable failure on the target. > > Are you sure it's not vice versa: EIO for retryable and ENODEV for > non-retryable failures. ENODEV looks more like permanent condition to me. > Ok, can do. And looking a the error numbers again, maybe we should be using 'EREMOTEIO' for non-retryable failures.
So we would be ending with:
ENOLINK: transport failure EIO: retryable remote failure EREMOTEIO: non-retryable remote failure
Does that look okay?
Cheers,
Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Markus Rex, HRB 16746 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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