netdev - Re: [PATCH net, stable v1 1/3] virtio

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Message-ID: <20230308015204-mutt-send-email-mst@kernel.org>
Date:   Wed, 8 Mar 2023 01:53:15 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Cc:     netdev@...r.kernel.org, Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org,
        Yichun Zhang <yichun@...nresty.com>,
        Alexander Duyck <alexanderduyck@...com>
Subject: Re: [PATCH net, stable v1 1/3] virtio_net: reorder some funcs

On Wed, Mar 08, 2023 at 10:49:33AM +0800, Xuan Zhuo wrote:
> The purpose of this is to facilitate the subsequent addition of new
> functions without introducing a separate declaration.
> 
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>

Acked-by: Michael S. Tsirkin <mst@...hat.com>

this one isn't for stable naturally, stable can use forward declarations
instead.

> ---
>  drivers/net/virtio_net.c | 92 ++++++++++++++++++++--------------------
>  1 file changed, 46 insertions(+), 46 deletions(-)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index fb5e68ed3ec2..8b31a04052f2 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -545,6 +545,52 @@ static struct sk_buff *page_to_skb(struct virtnet_info *vi,
>  	return skb;
>  }
>  
> +static void free_old_xmit_skbs(struct send_queue *sq, bool in_napi)
> +{
> +	unsigned int len;
> +	unsigned int packets = 0;
> +	unsigned int bytes = 0;
> +	void *ptr;
> +
> +	while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
> +		if (likely(!is_xdp_frame(ptr))) {
> +			struct sk_buff *skb = ptr;
> +
> +			pr_debug("Sent skb %p\n", skb);
> +
> +			bytes += skb->len;
> +			napi_consume_skb(skb, in_napi);
> +		} else {
> +			struct xdp_frame *frame = ptr_to_xdp(ptr);
> +
> +			bytes += xdp_get_frame_len(frame);
> +			xdp_return_frame(frame);
> +		}
> +		packets++;
> +	}
> +
> +	/* Avoid overhead when no packets have been processed
> +	 * happens when called speculatively from start_xmit.
> +	 */
> +	if (!packets)
> +		return;
> +
> +	u64_stats_update_begin(&sq->stats.syncp);
> +	sq->stats.bytes += bytes;
> +	sq->stats.packets += packets;
> +	u64_stats_update_end(&sq->stats.syncp);
> +}
> +
> +static bool is_xdp_raw_buffer_queue(struct virtnet_info *vi, int q)
> +{
> +	if (q < (vi->curr_queue_pairs - vi->xdp_queue_pairs))
> +		return false;
> +	else if (q < vi->curr_queue_pairs)
> +		return true;
> +	else
> +		return false;
> +}
> +
>  static int __virtnet_xdp_xmit_one(struct virtnet_info *vi,
>  				   struct send_queue *sq,
>  				   struct xdp_frame *xdpf)
> @@ -1714,52 +1760,6 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
>  	return stats.packets;
>  }
>  
> -static void free_old_xmit_skbs(struct send_queue *sq, bool in_napi)
> -{
> -	unsigned int len;
> -	unsigned int packets = 0;
> -	unsigned int bytes = 0;
> -	void *ptr;
> -
> -	while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
> -		if (likely(!is_xdp_frame(ptr))) {
> -			struct sk_buff *skb = ptr;
> -
> -			pr_debug("Sent skb %p\n", skb);
> -
> -			bytes += skb->len;
> -			napi_consume_skb(skb, in_napi);
> -		} else {
> -			struct xdp_frame *frame = ptr_to_xdp(ptr);
> -
> -			bytes += xdp_get_frame_len(frame);
> -			xdp_return_frame(frame);
> -		}
> -		packets++;
> -	}
> -
> -	/* Avoid overhead when no packets have been processed
> -	 * happens when called speculatively from start_xmit.
> -	 */
> -	if (!packets)
> -		return;
> -
> -	u64_stats_update_begin(&sq->stats.syncp);
> -	sq->stats.bytes += bytes;
> -	sq->stats.packets += packets;
> -	u64_stats_update_end(&sq->stats.syncp);
> -}
> -
> -static bool is_xdp_raw_buffer_queue(struct virtnet_info *vi, int q)
> -{
> -	if (q < (vi->curr_queue_pairs - vi->xdp_queue_pairs))
> -		return false;
> -	else if (q < vi->curr_queue_pairs)
> -		return true;
> -	else
> -		return false;
> -}
> -
>  static void virtnet_poll_cleantx(struct receive_queue *rq)
>  {
>  	struct virtnet_info *vi = rq->vq->vdev->priv;
> -- 
> 2.32.0.3.g01195cf9f