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Re: [PATCH] Virtual ethernet device (tunnel) [message #12548 is a reply to message #12546] Wed, 02 May 2007 12:59 Go to previous messageGo to previous message
Patrick McHardy is currently offline  Patrick McHardy
Messages: 107
Registered: March 2006
Senior Member
jamal wrote:
> On Wed, 2007-02-05 at 14:34 +0200, Patrick McHardy wrote:
>
>
>>Thats a lot better than using sysfs, but I think it would be
>>preferrable to use rtnetlink instead of genetlink for network
>>configuration.
>
>
> or you can just hold rtnl while using genl.
> I do agree it would be easier to just use rtnetlink ...


The rtnl needs to be held in either case, but using a different
netlink family introduces races in message processing. For example
a simple:

ip link add dev veth0
ip route add 10.0.0.0/8 dev veth0

might fail because we have two different input queues and the routing
message might get processed before the link message.

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