Michael Brown 1ba959c6b3 [NETDEV] Add notion of link state ...

Add ability for network devices to flag link up/down state to the
networking core.

Autobooting code will now wait for link-up before attempting DHCP.

IPoIB reflects the Infiniband link state as the network device link state
(which is not strictly correct; we also need a succesful IPoIB IPv4
broadcast group join), but is probably more informative.

2008-04-22 17:40:50 +01:00

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