From: Daniel Borkmann <daniel@iogearbox.net>
To: Martin KaFai Lau <kafai@fb.com>, netdev@vger.kernel.org
Cc: Alexei Starovoitov <ast@fb.com>,
Brenden Blanco <bblanco@plumgrid.com>,
David Miller <davem@davemloft.net>,
Jakub Kicinski <kubakici@wp.pl>,
Jesper Dangaard Brouer <brouer@redhat.com>,
John Fastabend <john.fastabend@gmail.com>,
Saeed Mahameed <saeedm@mellanox.com>,
Tariq Toukan <tariqt@mellanox.com>,
Kernel Team <kernel-team@fb.com>
Subject: Re: [PATCH v4 net-next 1/4] bpf: xdp: Allow head adjustment in XDP prog
Date: Thu, 08 Dec 2016 10:02:37 +0100 [thread overview]
Message-ID: <584921AD.3060004@iogearbox.net> (raw)
In-Reply-To: <1481154794-2311034-2-git-send-email-kafai@fb.com>
On 12/08/2016 12:53 AM, Martin KaFai Lau wrote:
> This patch allows XDP prog to extend/remove the packet
> data at the head (like adding or removing header). It is
> done by adding a new XDP helper bpf_xdp_adjust_head().
>
> It also renames bpf_helper_changes_skb_data() to
> bpf_helper_changes_pkt_data() to better reflect
> that XDP prog does not work on skb.
>
> This patch adds one "xdp_adjust_head" bit to bpf_prog for the
> XDP-capable driver to check if the XDP prog requires
> bpf_xdp_adjust_head() support. The driver can then decide
> to error out during XDP_SETUP_PROG.
>
> Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
next prev parent reply other threads:[~2016-12-08 9:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-07 23:53 [PATCH v4 net-next 0/4]: Allow head adjustment in XDP prog Martin KaFai Lau
2016-12-07 23:53 ` [PATCH v4 net-next 1/4] bpf: xdp: " Martin KaFai Lau
2016-12-08 9:02 ` Daniel Borkmann [this message]
2016-12-08 16:55 ` Alexei Starovoitov
2016-12-08 17:00 ` John Fastabend
2016-12-07 23:53 ` [PATCH v4 net-next 2/4] mlx4: xdp: Allow raising MTU up to one page minus eth and vlan hdrs Martin KaFai Lau
2016-12-08 18:36 ` Saeed Mahameed
2016-12-07 23:53 ` [PATCH v4 net-next 3/4] mlx4: xdp: Reserve headroom for receiving packet when XDP prog is active Martin KaFai Lau
2016-12-08 18:47 ` Saeed Mahameed
2016-12-07 23:53 ` [PATCH v4 net-next 4/4] bpf: xdp: Add XDP example for head adjustment Martin KaFai Lau
2016-12-08 19:25 ` [PATCH v4 net-next 0/4]: Allow head adjustment in XDP prog David Miller
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