Re: [libvirt] [PATCHv3 1/2] network: added waiting for DAD to finish for bridge address.

This loop *really* bothers me, because there is no failsafe to terminate it if we never get positive notification that DAD has completed. This would lock up the network driver startup, which would lock up libvirtd startup. I think we need to decide on what is the maximum time this could possibly take to complete (maybe it is somehow based on the number of interfaces? or maybe it doesn't matter...) and timeout from the loop after the appropriate iterations.

Is the "ip" command available on non-linux platforms? I know there is *a lot* of netlink stuff in there). Aside from that, POSIX_SHELL isn't even defined, so this code would fail to compile on non-Linux platforms with IP_PATH defined (and it would fail to compile on non-Linux with IP_PATH *not* defined, since addrs and count would then need ATTRIBUTE_UNUSED). Anyway we try to avoid execing external binaries unless absolutely necessary, so I think it's reasonable to only have a stub function that says "not supported" in place of this (very polite but non-working) replacement.

Once these 3 issues are dealt with, I think we can (finally) push this.