From patchwork Fri Dec 29 07:31:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 13506377 X-Patchwork-Delegate: kuba@kernel.org Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com [115.124.30.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01977125CE; Fri, 29 Dec 2023 07:31:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0VzQtfD5_1703835096; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VzQtfD5_1703835096) by smtp.aliyun-inc.com; Fri, 29 Dec 2023 15:31:37 +0800 From: Xuan Zhuo To: netdev@vger.kernel.org Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , virtualization@lists.linux-foundation.org, bpf@vger.kernel.org Subject: [PATCH net-next v3 24/27] virtio_net: xsk: rx: support recv small mode Date: Fri, 29 Dec 2023 15:31:05 +0800 Message-Id: <20231229073108.57778-25-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20231229073108.57778-1-xuanzhuo@linux.alibaba.com> References: <20231229073108.57778-1-xuanzhuo@linux.alibaba.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Git-Hash: 20112a26898d X-Patchwork-Delegate: kuba@kernel.org receive the xsk buffer for small mode. Signed-off-by: Xuan Zhuo --- drivers/net/virtio/xsk.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/net/virtio/xsk.c b/drivers/net/virtio/xsk.c index 005bb5f66271..ee09e898a291 100644 --- a/drivers/net/virtio/xsk.c +++ b/drivers/net/virtio/xsk.c @@ -200,6 +200,37 @@ static struct sk_buff *virtnet_receive_xsk_merge(struct net_device *dev, struct return NULL; } +static struct sk_buff *virtnet_receive_xsk_small(struct net_device *dev, struct virtnet_info *vi, + struct virtnet_rq *rq, struct xdp_buff *xdp, + unsigned int *xdp_xmit, + struct virtnet_rq_stats *stats) +{ + struct bpf_prog *prog; + u32 ret; + + ret = XDP_PASS; + rcu_read_lock(); + prog = rcu_dereference(rq->xdp_prog); + if (prog) + ret = virtnet_xdp_handler(prog, xdp, dev, xdp_xmit, stats); + rcu_read_unlock(); + + switch (ret) { + case XDP_PASS: + return xdp_construct_skb(rq, xdp); + + case XDP_TX: + case XDP_REDIRECT: + return NULL; + + default: + /* drop packet */ + xsk_buff_free(xdp); + u64_stats_inc(&stats->drops); + return NULL; + } +} + struct sk_buff *virtnet_receive_xsk_buf(struct virtnet_info *vi, struct virtnet_rq *rq, void *buf, u32 len, unsigned int *xdp_xmit, @@ -227,6 +258,8 @@ struct sk_buff *virtnet_receive_xsk_buf(struct virtnet_info *vi, struct virtnet_ if (vi->mergeable_rx_bufs) skb = virtnet_receive_xsk_merge(dev, vi, rq, xdp, xdp_xmit, stats); + else + skb = virtnet_receive_xsk_small(dev, vi, rq, xdp, xdp_xmit, stats); return skb; }