link up and don on ether async notification

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Hi boys,

Is some mechanism which can I  use to notify user space program 
asynochronously that link on my ethernet device is is down or up  ? ( I can't 
use polling like ethtool - i think that control every second state of link on 
ethernet through some of ioctl  is no good). 

Is good idea to use inotify on file  /sys/class/net/eth0/carrier ?

thanks for suggestion

Michal Bartolomej
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