On 06.09.2011 19:07, Lars Ellenberg wrote:
The basic problem: if the link goes away because of one node chaning its IP, we cannot possibly do a dns lookup from kernel space... Well, we could. But that would be a good reason to kick us out of the kernel and never talk to us again ;)
Yes, if you did that in kernel space, I guess.
But apparently there is an interface to let user space handle name lookups, see Documentation/networking/dns_resolver.txt in recent kernel sources. It seems to be used in CIFS and NFS.
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