netdev - Re: [net-next PATCH 1/3] samples/bpf: xdp_monitor first 8 bytes are not accessible by bpf

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Message-ID: <20171006161325.274axwwcgliuxmkz@ast-mbp.dhcp.thefacebook.com>
Date:   Fri, 6 Oct 2017 09:13:27 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     netdev@...r.kernel.org, Andy Gospodarek <andy@...yhouse.net>,
        Daniel Borkmann <borkmann@...earbox.net>
Subject: Re: [net-next PATCH 1/3] samples/bpf: xdp_monitor first 8 bytes are
 not accessible by bpf

On Fri, Oct 06, 2017 at 10:41:41AM +0200, Jesper Dangaard Brouer wrote:
> The first 8 bytes of the tracepoint context struct are not accessible
> by the bpf code.  This is a choice that dates back to the original
> inclusion of this code.
> 
> See explaination in:
>  commit 98b5c2c65c29 ("perf, bpf: allow bpf programs attach to tracepoints")
> 
> Signed-off-by: Jesper Dangaard Brouer <brouer@...hat.com>

thank you for fixing it.
Acked-by: Alexei Starovoitov <ast@...nel.org>