netdev - RE: [PATCH net] virtio_net: reject XDP programs using header adjustment

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Message-ID: <BL2PR07MB2306FB78FBB5F2D17681699D8D910@BL2PR07MB2306.namprd07.prod.outlook.com>
Date:   Mon, 19 Dec 2016 15:23:52 +0000
From:   "Mintz, Yuval" <Yuval.Mintz@...ium.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kafai@...com" <kafai@...com>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "alexei.starovoitov@...il.com" <alexei.starovoitov@...il.com>,
        "mst@...hat.com" <mst@...hat.com>
Subject: RE: [PATCH net] virtio_net: reject XDP programs using header
 adjustment

> commit 17bedab27231 ("bpf: xdp: Allow head adjustment in XDP prog")
> added a new XDP helper to prepend and remove data from a frame.
> Make virtio_net reject programs making use of this helper until proper
> support is added.
> 
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>

Is that how it goes until we'll add the proper infrastructure?
Am I expected to provide the same for qede?

I was under the impression that so long as this is being [early] developed
and there's no way to communicate what is and isn't supported by
a given implementation, it would simply be the user's responsibility
to make sure what he's trying is supported.