El 4/03/16 a les 16:54, Roger Pau Monné ha escrit:
> Linux already has some code to do this checking, but this also involves 
> taking a lock in order to make sure there's only one hotplug script 
> performing this check at the same time.
> The Linux function that performs this checking is in:
> http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=tools/hotplug/Linux/block;h=2691b56951c9b82094471a141b9e0bed04abb929;hb=HEAD#l40
> And the caller is:
> http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=tools/hotplug/Linux/block;h=2691b56951c9b82094471a141b9e0bed04abb929;hb=HEAD#l275
> If you take a look, the call to check_device_sharing is protected with the 
> "block" lock.

   Thank you, today I wasn't unable to code, I hope I'll have some time
this afternoon.

   Btw, In coding sh style, I don't want to bring in bash and add
another dependency to the xen-tools port.

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