Re: [nf-next RFC] netfilter: nf_tables: Feature ifname-based hook registration

[Florian Westphal <fw@strlen.de>]

Phil Sutter <phil@nwl.cc> wrote:
> personally wouldn't care about as I find it similar to mis-typing an IP
> address or RHS to an iifname match.

Good point.  I think if performance isn't an issue then we can go ahead
without this flag.

> If transparency of behaviour is a
> concern, I'd rather implement GETDEV message type and enable user space
> to print the list of currently bound interfaces (though it's partially
> redundant, 'nft list hooks' helps there although it does not show which
> flowtable/chain "owns" the hook).

Do we need new query types for this?
nftables could just query via rtnetlink if the device exists or not
and then print a hint if its absent.