[dm-devel] [multipath-tools] multipath -ll and offline devices

[Christophe Varoqui]

On Fri, Sep 23, 2005 at 03:56:50PM +0200, Stefan Bader wrote:
> Hi, 
> 
> I got a report about strange behaviour of "multipath -l" if one of the 
> devices that are used for
> multipathing is set offline. In that case the code in libmultipath 
> (discovery.c) just ends processing
> and the output is incomplete.
> 
> The problem is that setting a scsi device offline (through sysfs state 
> attribute) will remove the
> device node in /dev. And this will cause pathinfo to abort which gives no 
> output at all.
> This looks strange and in that situation the path could be assumed as 
> failed. On the other hand
> if the device node just had been removed "failed" wouldn't be a correct 
> state.
> 
> One solution might be to use the state attribute of the scsi device 
> (wasn't that once called online?
> *sigh*) to check for an offline device and set the path state to failed in 
> that case. Or should the map
> get updated as soon as the device is set offline, to remove the path?
>
Thanks for the report,

I merged a fix.
Can you report on its behaviour ?
 
Regards,
cvaroqui