Re: [PATCH net-next 03/14] gtp: Call common functions to get tunnel routes and add dst_cache

Hi Dave,

On Mon, Sep 18, 2017 at 09:17:51PM -0700, David Miller wrote:

This and the new dst caching code ignores any source address selection
done by ip_route_output_key() or the new tunnel route lookup helpers.

Either source address selection should be respected, or if saddr will
never be modified by a route lookup for some specific reason here,
that should be documented.

The IP source address is fixed by signaling on the GTP-C control plane
and nothing that the kernel can unilaterally decide to change.  Such a
change of address would have to be decided by and first be signaled on
GTP-C to the peer by the userspace daemon, which would then update the
PDP context in the kernel.

So I guess you're asking us to document that rationale as form of a
source code comment ?

-- 
- Harald Welte [off-list ref]           http://laforge.gnumonks.org/
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