netdev - Re: [PATCH net-next v2] net/mlx5e: Support bpf_xdp_adjust

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Date:   Wed, 18 Jan 2017 11:31:27 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     kafai@...com
Cc:     netdev@...r.kernel.org, saeedm@...lanox.com, tariqt@...lanox.com,
        kernel-team@...com
Subject: Re: [PATCH net-next v2] net/mlx5e: Support bpf_xdp_adjust_head()

From: Martin KaFai Lau <kafai@...com>
Date: Tue, 17 Jan 2017 22:06:07 -0800

> This patch adds bpf_xdp_adjust_head() support to mlx5e.
> 
> 1. rx_headroom is added to struct mlx5e_rq.  It uses
>    an existing 4 byte hole in the struct.
> 2. The adjusted data length is checked against
>    MLX5E_XDP_MIN_INLINE and MLX5E_SW2HW_MTU(rq->netdev->mtu).
> 3. The macro MLX5E_SW2HW_MTU is moved from en_main.c to en.h.
>    MLX5E_HW2SW_MTU is also moved to en.h for symmetric reason
>    but it is not a must.
> 
> v2:
> - Keep the xdp specific logic in mlx5e_xdp_handle()
> - Update dma_len after the sanity checks in mlx5e_xmit_xdp_frame()
> 
> Signed-off-by: Martin KaFai Lau <kafai@...com>

Applied.