netdev - Re: [PATCH bpf-next 10/13] bpf: Sync bpf.h to tools

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Date:   Wed, 20 Mar 2019 10:56:22 -0400
From:   Soheil Hassas Yeganeh <soheil@...gle.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Stanislav Fomichev <sdf@...gle.com>,
        Peter Oskolkov <posk@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH bpf-next 10/13] bpf: Sync bpf.h to tools

On Wed, Mar 20, 2019 at 10:50 AM Willem de Bruijn
<willemdebruijn.kernel@...il.com> wrote:
>
> From: Willem de Bruijn <willemb@...gle.com>
>
> Sync include/uapi/linux/bpf.h with tools/
>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>

> ---
>  tools/include/uapi/linux/bpf.h | 22 +++++++++++++++++++++-
>  1 file changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
> index 929c8e537a14a..a444534cc88d7 100644
> --- a/tools/include/uapi/linux/bpf.h
> +++ b/tools/include/uapi/linux/bpf.h
> @@ -1478,7 +1478,10 @@ union bpf_attr {
>   *             Grow or shrink the room for data in the packet associated to
>   *             *skb* by *len_diff*, and according to the selected *mode*.
>   *
> - *             There is a single supported mode at this time:
> + *             There are two supported modes at this time:
> + *
> + *             * **BPF_ADJ_ROOM_MAC**: Adjust room at the mac layer
> + *               (room space is added or removed below the layer 2 header).
>   *
>   *             * **BPF_ADJ_ROOM_NET**: Adjust room at the network layer
>   *               (room space is added or removed below the layer 3 header).
> @@ -2590,9 +2593,26 @@ enum bpf_func_id {
>  /* Current network namespace */
>  #define BPF_F_CURRENT_NETNS            (-1L)
>
> +/* BPF_FUNC_skb_adjust_room flags. */
> +#define BPF_F_ADJ_ROOM_FIXED_GSO       (1ULL << 0)
> +
> +#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV4   (1ULL << 1)
> +#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV6   (1ULL << 2)
> +#define BPF_F_ADJ_ROOM_ENCAP_L3_MASK   (BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 | \
> +                                        BPF_F_ADJ_ROOM_ENCAP_L3_IPV6)
> +
> +#define BPF_F_ADJ_ROOM_ENCAP_L4_GRE    (1ULL << 3)
> +#define BPF_F_ADJ_ROOM_ENCAP_L4_UDP    (1ULL << 4)
> +
> +#define BPF_F_ADJ_ROOM_MASK            (BPF_F_ADJ_ROOM_FIXED_GSO | \
> +                                        BPF_F_ADJ_ROOM_ENCAP_L3_MASK | \
> +                                        BPF_F_ADJ_ROOM_ENCAP_L4_GRE | \
> +                                        BPF_F_ADJ_ROOM_ENCAP_L4_UDP)
> +
>  /* Mode for BPF_FUNC_skb_adjust_room helper. */
>  enum bpf_adj_room_mode {
>         BPF_ADJ_ROOM_NET,
> +       BPF_ADJ_ROOM_MAC,
>  };
>
>  /* Mode for BPF_FUNC_skb_load_bytes_relative helper. */
> --
> 2.21.0.225.g810b269d1ac-goog
>