[BIRD 2.0.x] Netlink: ignore dead routes

[Ondrej Zajicek]

On Mon, Dec 27, 2021 at 02:51:34PM +0100, Alexander Zubkov wrote:
> Hi all,
> 
> I'll pop up this old discussion. I've found a bug with bird handling
> its routes when ignore_routes_with_linkdown is enabled. And I suspect
> it is related to this patch.
> The problem is that bird does not replace or delete the routes it
> installed when they are marked as dead. For example if we stop it with
> "graceful restart", the routes are left in the table and after we
> start bird again with updated config, this old route remains in the
> table. I can reproduce it with bird compiled from master branch now.
> Now, that I have found this thread, I suppose, that this changes blind
> bird for all such routes during the scan. As a result bird also
> ignores its own routes (proto bird), which causes problems. I think
> there should be an exception for the routes that are installed by bird
> itself.

Hi

You are right, it makes sense to apply dead-flag handling only to
to non-bird routes. Will fix that.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
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"To err is human -- to blame it on a computer is even more so."