netdev - Re: [PATCH bpf-next 04/10] [bpf]: make generic xdp compatible w/ bpf_xdp_adjust

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Message-ID: <20180417230613.vd24e5elzgygegx7@ast-mbp>
Date:   Tue, 17 Apr 2018 16:06:14 -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>,
        "David S. Miller " <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next 04/10] [bpf]: make generic xdp compatible w/
 bpf_xdp_adjust_tail

On Mon, Apr 16, 2018 at 11:51:25PM -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 generic XDP we need to reflect this packet's length change by
> adjusting skb's tail pointer
> 
> Signed-off-by: Nikita V. Shirokov <tehnerd@...nerd.com>

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

pls also change the order of the test/sample patches.
they should come last, since they will work only after this one
and all other driver support.