netdev - Re: [PATCH net-next v3 1/2] libbpf: parse maps sections of varying size

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Message-ID: <59D6873D.6070407@iogearbox.net>
Date:   Thu, 05 Oct 2017 21:25:49 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Craig Gallek <kraigatgoog@...il.com>,
        Alexei Starovoitov <ast@...com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        "David S . Miller" <davem@...emloft.net>
CC:     Chonggang Li <chonggangli@...gle.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v3 1/2] libbpf: parse maps sections of varying
 size

On 10/05/2017 04:41 PM, Craig Gallek wrote:
> From: Craig Gallek <kraig@...gle.com>
>
> This library previously assumed a fixed-size map options structure.
> Any new options were ignored.  In order to allow the options structure
> to grow and to support parsing older programs, this patch updates
> the maps section parsing to handle varying sizes.
>
> Object files with maps sections smaller than expected will have the new
> fields initialized to zero.  Object files which have larger than expected
> maps sections will be rejected unless all of the unrecognized data is zero.
>
> This change still assumes that each map definition in the maps section
> is the same size.
>
> Signed-off-by: Craig Gallek <kraig@...gle.com>

Thanks,

Acked-by: Daniel Borkmann <daniel@...earbox.net>