netdev - Re: [PATCH net-next] bpf: make bpf_xdp_adjust

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Message-Id: <20170424.161845.1467050507287280432.davem@davemloft.net>
Date:   Mon, 24 Apr 2017 16:18:45 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     daniel@...earbox.net
Cc:     ast@...com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] bpf: make bpf_xdp_adjust_head support
 mandatory

From: Daniel Borkmann <daniel@...earbox.net>
Date: Mon, 24 Apr 2017 22:14:35 +0200

> Now that also the last in-tree user of the xdp_adjust_head bit has
> been removed, we can remove the flag from struct bpf_prog altogether.
> 
> This, at the same time, also makes sure that any future driver for
> XDP comes with bpf_xdp_adjust_head() support right away.
> 
> A rejection based on this flag would also mean that tail calls
> couldn't be used with such driver as per c2002f983767 ("bpf: fix
> checking xdp_adjust_head on tail calls") fix, thus lets not allow
> for it in the first place.
> 
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
> Acked-by: Alexei Starovoitov <ast@...nel.org>

Applied, thanks Daniel.