netdev - [PATCH net-next v2 19/21] virtio_net: xsk: rx: virtnet_rq_free_unused

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Message-Id: <20231107031227.100015-20-xuanzhuo@linux.alibaba.com>
Date: Tue,  7 Nov 2023 11:12:25 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.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
Subject: [PATCH net-next v2 19/21] virtio_net: xsk: rx: virtnet_rq_free_unused_buf() check xsk buffer

Since this will be called in other circumstances(freeze), we must check
whether it is xsk's buffer in this function. It cannot be judged outside
this function.

Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
---
 drivers/net/virtio/main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c
index 095f4acb0577..42c7dbf53e63 100644
--- a/drivers/net/virtio/main.c
+++ b/drivers/net/virtio/main.c
@@ -3948,6 +3948,14 @@ void virtnet_rq_free_unused_buf(struct virtqueue *vq, void *buf)
 
 	rq = &vi->rq[i];
 
+	if (rq->xsk.pool) {
+		struct xdp_buff *xdp;
+
+		xdp = (struct xdp_buff *)buf;
+		xsk_buff_free(xdp);
+		return;
+	}
+
 	if (rq->do_dma_unmap)
 		virtnet_rq_unmap(rq, buf, 0);
 
-- 
2.32.0.3.g01195cf9f