netdev - Re: [PATCH bpf-next 05/10] [bpf]: make mlx4 compatible w/ bpf_xdp_adjust

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Message-ID: <20180417230644.s4pre4rc263rtptn@ast-mbp>
Date:   Tue, 17 Apr 2018 16:06:45 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     "Nikita V. Shirokov" <tehnerd@...nerd.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Tariq Toukan <tariqt@...lanox.com>, netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next 05/10] [bpf]: make mlx4 compatible w/
 bpf_xdp_adjust_tail

On Mon, Apr 16, 2018 at 11:51:26PM -0700, Nikita V. Shirokov wrote:
> w/ bpf_xdp_adjust_tail helper xdp's data_end pointer could be changed as
> well (only "decrease" of pointer's location is going to be supported).
> changing of this pointer will change packet's size.
> for mlx4 driver we will just calculate packet's length unconditionally
> (the same way as it's already being done in mlx5)
> 
> Signed-off-by: Nikita V. Shirokov <tehnerd@...nerd.com>

Acked-by: Alexei Starovoitov <ast@...nel.org>