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On Wed, Jun 11, 2008 at 9:10 PM, Patrick McHardy <kaber@xxxxxxxxx> wrote:
> Julius Volz wrote:
>> ipvsadm uses get/set-sockopts on a raw socket to pass commands and
>> structs (as defined in include/net/ip_vs.h) to the kernel. So the
>> passed structs have to match exactly between userspace and kernel. The
>> kernel ip_vs.h also includes a version number that is used to verify
>> that ipvsadm matches your kernel version.
>
> So they define an ABI, which means they must not be changed in
> incompabtible ways. The question is whether they are actually
> changed in incomaptible ways.
It is clearly laid out to be able to be changed over time, hence the
ipvsadm version check... I think this whole interface is quite an
exception though.
Julius
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Google Switzerland GmbH
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