netdev - Re: [PATCH 03/11] netdev: add XDP_SETUP_ZC

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Message-ID: <ac2d595a-c803-b512-84c9-a5ab35615637@kernel.org>
Date: Fri, 25 Aug 2023 20:21:02 -0600
From: David Ahern <dsahern@...nel.org>
To: David Wei <dw@...idwei.uk>, Jens Axboe <axboe@...nel.dk>,
 Pavel Begunkov <asml.silence@...il.com>
Cc: io-uring@...r.kernel.org, netdev@...r.kernel.org,
 Mina Almasry <almasrymina@...gle.com>, Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH 03/11] netdev: add XDP_SETUP_ZC_RX command

On 8/25/23 6:19 PM, David Wei wrote:
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 08fbd4622ccf..a20a5c847916 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1000,6 +1000,7 @@ enum bpf_netdev_command {
>  	BPF_OFFLOAD_MAP_ALLOC,
>  	BPF_OFFLOAD_MAP_FREE,
>  	XDP_SETUP_XSK_POOL,
> +	XDP_SETUP_ZC_RX,

Why XDP in the name? Packets go from nic to driver to stack to io_uring,
no? That is not XDP.


>  };
>  
>  struct bpf_prog_offload_ops;
> @@ -1038,6 +1039,11 @@ struct netdev_bpf {
>  			struct xsk_buff_pool *pool;
>  			u16 queue_id;
>  		} xsk;
> +		/* XDP_SETUP_ZC_RX */
> +		struct {
> +			struct io_zc_rx_ifq *ifq;
> +			u16 queue_id;
> +		} zc_rx;
>  	};
>  };
>