From: Dan Smith <redacted>
Date: Thu, 25 Feb 2010 12:43:12 -0800

Adds an ndo_checkpoint() handler for veth devices to checkpoint themselves.
Writes out the pairing information, addresses, and initiates a checkpoint
on the peer if the peer won't be reached from another netns.  Throws an
error of our peer's netns isn't already in the hash (i.e., a tree leak).

Changes in v2:
 - Fix check detecting if peer is in the init netns

Signed-off-by: Dan Smith <redacted>

Acked-by: David S. Miller <davem@davemloft.net>