netdev - Re: [PATCH v3] netfilter: nft_meta: Add NFT_META

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Message-ID: <a1a3c7cc-cdd5-3409-8296-f057c6e869c6@gmail.com>
Date:   Fri, 18 Jan 2019 07:27:48 -0700
From:   David Ahern <dsahern@...il.com>
To:     Pablo Neira Ayuso <pablo@...filter.org>, wenxu@...oud.cn
Cc:     fw@...len.de, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org
Subject: Re: [PATCH v3] netfilter: nft_meta: Add NFT_META_I/OIFKIND meta type

On 1/18/19 7:24 AM, Pablo Neira Ayuso wrote:
> 
> There is no other way to identify a vft device rather than this
> string? The only l3mdev that exists if vrf, right?

ipvlan uses some of the hooks.

> 
> If there is no other alternative, we can just place this in the tree,
> but probably it would be better to have a numeric way to identify a
> vrf device?

IFF_L3MDEV_MASTER and IFF_L3MDEV_SLAVE are used via netif_is_l3_master
and netif_is_l3_slave in all of the code. This was done because of
requests to not bleed 'vrf' all over core kernel code.