diff mbox series

[net-next,v1,15/19] virtio_net: xsk: rx: introduce add_recvbuf_xsk()

Message ID 20231016120033.26933-16-xuanzhuo@linux.alibaba.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series virtio-net: support AF_XDP zero copy | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches (and no cover letter)
netdev/tree_selection success Clearly marked for net-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1363 this patch: 1363
netdev/cc_maintainers success CCed 14 of 14 maintainers
netdev/build_clang success Errors and warnings before: 1385 this patch: 1385
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1390 this patch: 1390
netdev/checkpatch warning WARNING: line length of 82 exceeds 80 columns WARNING: line length of 84 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Xuan Zhuo Oct. 16, 2023, noon UTC 
Implement the logic of filling vq with XSK buffer.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
 drivers/net/virtio/main.c       | 13 +++++++
 drivers/net/virtio/virtio_net.h |  5 +++
 drivers/net/virtio/xsk.c        | 66 ++++++++++++++++++++++++++++++++-
 drivers/net/virtio/xsk.h        |  2 +
 4 files changed, 85 insertions(+), 1 deletion(-)

Comments

Jason Wang Oct. 20, 2023, 6:56 a.m. UTC | #1 
On Mon, Oct 16, 2023 at 8:01 PM Xuan Zhuo <xuanzhuo@linux.alibaba.com> wrote:
>
> Implement the logic of filling vq with XSK buffer.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> ---
>  drivers/net/virtio/main.c       | 13 +++++++
>  drivers/net/virtio/virtio_net.h |  5 +++
>  drivers/net/virtio/xsk.c        | 66 ++++++++++++++++++++++++++++++++-
>  drivers/net/virtio/xsk.h        |  2 +
>  4 files changed, 85 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c
> index 58bb38f9b453..0e740447b142 100644
> --- a/drivers/net/virtio/main.c
> +++ b/drivers/net/virtio/main.c
> @@ -1787,9 +1787,20 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi,
>  static bool try_fill_recv(struct virtnet_info *vi, struct virtnet_rq *rq,
>                           gfp_t gfp)
>  {
> +       struct xsk_buff_pool *pool;
>         int err;
>         bool oom;
>
> +       rcu_read_lock();

A question here: should we sync with refill work during rx_pause?

> +       pool = rcu_dereference(rq->xsk.pool);
> +       if (pool) {
> +               err = virtnet_add_recvbuf_xsk(vi, rq, pool, gfp);
> +               oom = err == -ENOMEM;
> +               rcu_read_unlock();
> +               goto kick;
> +       }
> +       rcu_read_unlock();

And if we synchronize with that there's probably no need for the rcu
and we can merge the logic with the following ones?

Thanks


> +
>         do {
>                 if (vi->mergeable_rx_bufs)
>                         err = add_recvbuf_mergeable(vi, rq, gfp);
> @@ -1802,6 +1813,8 @@ static bool try_fill_recv(struct virtnet_info *vi, struct virtnet_rq *rq,
>                 if (err)
>                         break;
>         } while (rq->vq->num_free);
> +
> +kick:
>         if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
>                 unsigned long flags;
>
> diff --git a/drivers/net/virtio/virtio_net.h b/drivers/net/virtio/virtio_net.h
> index d4e620a084f4..6e71622fca45 100644
> --- a/drivers/net/virtio/virtio_net.h
> +++ b/drivers/net/virtio/virtio_net.h
> @@ -156,6 +156,11 @@ struct virtnet_rq {
>
>                 /* xdp rxq used by xsk */
>                 struct xdp_rxq_info xdp_rxq;
> +
> +               struct xdp_buff **xsk_buffs;
> +               u32 nxt_idx;
> +               u32 num;
> +               u32 size;
>         } xsk;
>  };
>
> diff --git a/drivers/net/virtio/xsk.c b/drivers/net/virtio/xsk.c
> index 973e783260c3..841fb078882a 100644
> --- a/drivers/net/virtio/xsk.c
> +++ b/drivers/net/virtio/xsk.c
> @@ -37,6 +37,58 @@ static void virtnet_xsk_check_queue(struct virtnet_sq *sq)
>                 netif_stop_subqueue(dev, qnum);
>  }
>
> +static int virtnet_add_recvbuf_batch(struct virtnet_info *vi, struct virtnet_rq *rq,
> +                                    struct xsk_buff_pool *pool, gfp_t gfp)
> +{
> +       struct xdp_buff **xsk_buffs;
> +       dma_addr_t addr;
> +       u32 len, i;
> +       int err = 0;
> +
> +       xsk_buffs = rq->xsk.xsk_buffs;
> +
> +       if (rq->xsk.nxt_idx >= rq->xsk.num) {
> +               rq->xsk.num = xsk_buff_alloc_batch(pool, xsk_buffs, rq->xsk.size);
> +               if (!rq->xsk.num)
> +                       return -ENOMEM;
> +               rq->xsk.nxt_idx = 0;
> +       }
> +
> +       while (rq->xsk.nxt_idx < rq->xsk.num) {
> +               i = rq->xsk.nxt_idx;
> +
> +               /* use the part of XDP_PACKET_HEADROOM as the virtnet hdr space */
> +               addr = xsk_buff_xdp_get_dma(xsk_buffs[i]) - vi->hdr_len;
> +               len = xsk_pool_get_rx_frame_size(pool) + vi->hdr_len;
> +
> +               sg_init_table(rq->sg, 1);
> +               sg_fill_dma(rq->sg, addr, len);
> +
> +               err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, xsk_buffs[i], gfp);
> +               if (err)
> +                       return err;
> +
> +               rq->xsk.nxt_idx++;
> +       }
> +
> +       return 0;
> +}
> +
> +int virtnet_add_recvbuf_xsk(struct virtnet_info *vi, struct virtnet_rq *rq,
> +                           struct xsk_buff_pool *pool, gfp_t gfp)
> +{
> +       int err;
> +
> +       do {
> +               err = virtnet_add_recvbuf_batch(vi, rq, pool, gfp);
> +               if (err)
> +                       return err;
> +
> +       } while (rq->vq->num_free);
> +
> +       return 0;
> +}
> +
>  static int virtnet_xsk_xmit_one(struct virtnet_sq *sq,
>                                 struct xsk_buff_pool *pool,
>                                 struct xdp_desc *desc)
> @@ -244,7 +296,7 @@ static int virtnet_xsk_pool_enable(struct net_device *dev,
>         struct virtnet_sq *sq;
>         struct device *dma_dev;
>         dma_addr_t hdr_dma;
> -       int err;
> +       int err, size;
>
>         /* In big_packets mode, xdp cannot work, so there is no need to
>          * initialize xsk of rq.
> @@ -276,6 +328,16 @@ static int virtnet_xsk_pool_enable(struct net_device *dev,
>         if (!dma_dev)
>                 return -EPERM;
>
> +       size = virtqueue_get_vring_size(rq->vq);
> +
> +       rq->xsk.xsk_buffs = kcalloc(size, sizeof(*rq->xsk.xsk_buffs), GFP_KERNEL);
> +       if (!rq->xsk.xsk_buffs)
> +               return -ENOMEM;
> +
> +       rq->xsk.size = size;
> +       rq->xsk.nxt_idx = 0;
> +       rq->xsk.num = 0;
> +
>         hdr_dma = dma_map_single(dma_dev, &xsk_hdr, vi->hdr_len, DMA_TO_DEVICE);
>         if (dma_mapping_error(dma_dev, hdr_dma))
>                 return -ENOMEM;
> @@ -338,6 +400,8 @@ static int virtnet_xsk_pool_disable(struct net_device *dev, u16 qid)
>         err1 = virtnet_sq_bind_xsk_pool(vi, sq, NULL);
>         err2 = virtnet_rq_bind_xsk_pool(vi, rq, NULL);
>
> +       kfree(rq->xsk.xsk_buffs);
> +
>         return err1 | err2;
>  }
>
> diff --git a/drivers/net/virtio/xsk.h b/drivers/net/virtio/xsk.h
> index 7ebc9bda7aee..bef41a3f954e 100644
> --- a/drivers/net/virtio/xsk.h
> +++ b/drivers/net/virtio/xsk.h
> @@ -23,4 +23,6 @@ int virtnet_xsk_pool_setup(struct net_device *dev, struct netdev_bpf *xdp);
>  bool virtnet_xsk_xmit(struct virtnet_sq *sq, struct xsk_buff_pool *pool,
>                       int budget);
>  int virtnet_xsk_wakeup(struct net_device *dev, u32 qid, u32 flag);
> +int virtnet_add_recvbuf_xsk(struct virtnet_info *vi, struct virtnet_rq *rq,
> +                           struct xsk_buff_pool *pool, gfp_t gfp);
>  #endif
> --
> 2.32.0.3.g01195cf9f
>
Xuan Zhuo Oct. 23, 2023, 6:56 a.m. UTC | #2 
On Fri, 20 Oct 2023 14:56:51 +0800, Jason Wang <jasowang@redhat.com> wrote:
> On Mon, Oct 16, 2023 at 8:01 PM Xuan Zhuo <xuanzhuo@linux.alibaba.com> wrote:
> >
> > Implement the logic of filling vq with XSK buffer.
> >
> > Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> > ---
> >  drivers/net/virtio/main.c       | 13 +++++++
> >  drivers/net/virtio/virtio_net.h |  5 +++
> >  drivers/net/virtio/xsk.c        | 66 ++++++++++++++++++++++++++++++++-
> >  drivers/net/virtio/xsk.h        |  2 +
> >  4 files changed, 85 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c
> > index 58bb38f9b453..0e740447b142 100644
> > --- a/drivers/net/virtio/main.c
> > +++ b/drivers/net/virtio/main.c
> > @@ -1787,9 +1787,20 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi,
> >  static bool try_fill_recv(struct virtnet_info *vi, struct virtnet_rq *rq,
> >                           gfp_t gfp)
> >  {
> > +       struct xsk_buff_pool *pool;
> >         int err;
> >         bool oom;
> >
> > +       rcu_read_lock();
>
> A question here: should we sync with refill work during rx_pause?
>
> > +       pool = rcu_dereference(rq->xsk.pool);
> > +       if (pool) {
> > +               err = virtnet_add_recvbuf_xsk(vi, rq, pool, gfp);
> > +               oom = err == -ENOMEM;
> > +               rcu_read_unlock();
> > +               goto kick;
> > +       }
> > +       rcu_read_unlock();
>
> And if we synchronize with that there's probably no need for the rcu
> and we can merge the logic with the following ones?


YES. we synchronize the rx_pause and this.

But for the rcu object, I think we should use rcu_xxx() API.

Thanks.


>
> Thanks
>
>
> > +
> >         do {
> >                 if (vi->mergeable_rx_bufs)
> >                         err = add_recvbuf_mergeable(vi, rq, gfp);
> > @@ -1802,6 +1813,8 @@ static bool try_fill_recv(struct virtnet_info *vi, struct virtnet_rq *rq,
> >                 if (err)
> >                         break;
> >         } while (rq->vq->num_free);
> > +
> > +kick:
> >         if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
> >                 unsigned long flags;
> >
> > diff --git a/drivers/net/virtio/virtio_net.h b/drivers/net/virtio/virtio_net.h
> > index d4e620a084f4..6e71622fca45 100644
> > --- a/drivers/net/virtio/virtio_net.h
> > +++ b/drivers/net/virtio/virtio_net.h
> > @@ -156,6 +156,11 @@ struct virtnet_rq {
> >
> >                 /* xdp rxq used by xsk */
> >                 struct xdp_rxq_info xdp_rxq;
> > +
> > +               struct xdp_buff **xsk_buffs;
> > +               u32 nxt_idx;
> > +               u32 num;
> > +               u32 size;
> >         } xsk;
> >  };
> >
> > diff --git a/drivers/net/virtio/xsk.c b/drivers/net/virtio/xsk.c
> > index 973e783260c3..841fb078882a 100644
> > --- a/drivers/net/virtio/xsk.c
> > +++ b/drivers/net/virtio/xsk.c
> > @@ -37,6 +37,58 @@ static void virtnet_xsk_check_queue(struct virtnet_sq *sq)
> >                 netif_stop_subqueue(dev, qnum);
> >  }
> >
> > +static int virtnet_add_recvbuf_batch(struct virtnet_info *vi, struct virtnet_rq *rq,
> > +                                    struct xsk_buff_pool *pool, gfp_t gfp)
> > +{
> > +       struct xdp_buff **xsk_buffs;
> > +       dma_addr_t addr;
> > +       u32 len, i;
> > +       int err = 0;
> > +
> > +       xsk_buffs = rq->xsk.xsk_buffs;
> > +
> > +       if (rq->xsk.nxt_idx >= rq->xsk.num) {
> > +               rq->xsk.num = xsk_buff_alloc_batch(pool, xsk_buffs, rq->xsk.size);
> > +               if (!rq->xsk.num)
> > +                       return -ENOMEM;
> > +               rq->xsk.nxt_idx = 0;
> > +       }
> > +
> > +       while (rq->xsk.nxt_idx < rq->xsk.num) {
> > +               i = rq->xsk.nxt_idx;
> > +
> > +               /* use the part of XDP_PACKET_HEADROOM as the virtnet hdr space */
> > +               addr = xsk_buff_xdp_get_dma(xsk_buffs[i]) - vi->hdr_len;
> > +               len = xsk_pool_get_rx_frame_size(pool) + vi->hdr_len;
> > +
> > +               sg_init_table(rq->sg, 1);
> > +               sg_fill_dma(rq->sg, addr, len);
> > +
> > +               err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, xsk_buffs[i], gfp);
> > +               if (err)
> > +                       return err;
> > +
> > +               rq->xsk.nxt_idx++;
> > +       }
> > +
> > +       return 0;
> > +}
> > +
> > +int virtnet_add_recvbuf_xsk(struct virtnet_info *vi, struct virtnet_rq *rq,
> > +                           struct xsk_buff_pool *pool, gfp_t gfp)
> > +{
> > +       int err;
> > +
> > +       do {
> > +               err = virtnet_add_recvbuf_batch(vi, rq, pool, gfp);
> > +               if (err)
> > +                       return err;
> > +
> > +       } while (rq->vq->num_free);
> > +
> > +       return 0;
> > +}
> > +
> >  static int virtnet_xsk_xmit_one(struct virtnet_sq *sq,
> >                                 struct xsk_buff_pool *pool,
> >                                 struct xdp_desc *desc)
> > @@ -244,7 +296,7 @@ static int virtnet_xsk_pool_enable(struct net_device *dev,
> >         struct virtnet_sq *sq;
> >         struct device *dma_dev;
> >         dma_addr_t hdr_dma;
> > -       int err;
> > +       int err, size;
> >
> >         /* In big_packets mode, xdp cannot work, so there is no need to
> >          * initialize xsk of rq.
> > @@ -276,6 +328,16 @@ static int virtnet_xsk_pool_enable(struct net_device *dev,
> >         if (!dma_dev)
> >                 return -EPERM;
> >
> > +       size = virtqueue_get_vring_size(rq->vq);
> > +
> > +       rq->xsk.xsk_buffs = kcalloc(size, sizeof(*rq->xsk.xsk_buffs), GFP_KERNEL);
> > +       if (!rq->xsk.xsk_buffs)
> > +               return -ENOMEM;
> > +
> > +       rq->xsk.size = size;
> > +       rq->xsk.nxt_idx = 0;
> > +       rq->xsk.num = 0;
> > +
> >         hdr_dma = dma_map_single(dma_dev, &xsk_hdr, vi->hdr_len, DMA_TO_DEVICE);
> >         if (dma_mapping_error(dma_dev, hdr_dma))
> >                 return -ENOMEM;
> > @@ -338,6 +400,8 @@ static int virtnet_xsk_pool_disable(struct net_device *dev, u16 qid)
> >         err1 = virtnet_sq_bind_xsk_pool(vi, sq, NULL);
> >         err2 = virtnet_rq_bind_xsk_pool(vi, rq, NULL);
> >
> > +       kfree(rq->xsk.xsk_buffs);
> > +
> >         return err1 | err2;
> >  }
> >
> > diff --git a/drivers/net/virtio/xsk.h b/drivers/net/virtio/xsk.h
> > index 7ebc9bda7aee..bef41a3f954e 100644
> > --- a/drivers/net/virtio/xsk.h
> > +++ b/drivers/net/virtio/xsk.h
> > @@ -23,4 +23,6 @@ int virtnet_xsk_pool_setup(struct net_device *dev, struct netdev_bpf *xdp);
> >  bool virtnet_xsk_xmit(struct virtnet_sq *sq, struct xsk_buff_pool *pool,
> >                       int budget);
> >  int virtnet_xsk_wakeup(struct net_device *dev, u32 qid, u32 flag);
> > +int virtnet_add_recvbuf_xsk(struct virtnet_info *vi, struct virtnet_rq *rq,
> > +                           struct xsk_buff_pool *pool, gfp_t gfp);
> >  #endif
> > --
> > 2.32.0.3.g01195cf9f
> >
>
diff mbox series

Patch

diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c
index 58bb38f9b453..0e740447b142 100644
--- a/drivers/net/virtio/main.c
+++ b/drivers/net/virtio/main.c
@@ -1787,9 +1787,20 @@  static int add_recvbuf_mergeable(struct virtnet_info *vi,
 static bool try_fill_recv(struct virtnet_info *vi, struct virtnet_rq *rq,
 			  gfp_t gfp)
 {
+	struct xsk_buff_pool *pool;
 	int err;
 	bool oom;
 
+	rcu_read_lock();
+	pool = rcu_dereference(rq->xsk.pool);
+	if (pool) {
+		err = virtnet_add_recvbuf_xsk(vi, rq, pool, gfp);
+		oom = err == -ENOMEM;
+		rcu_read_unlock();
+		goto kick;
+	}
+	rcu_read_unlock();
+
 	do {
 		if (vi->mergeable_rx_bufs)
 			err = add_recvbuf_mergeable(vi, rq, gfp);
@@ -1802,6 +1813,8 @@  static bool try_fill_recv(struct virtnet_info *vi, struct virtnet_rq *rq,
 		if (err)
 			break;
 	} while (rq->vq->num_free);
+
+kick:
 	if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
 		unsigned long flags;
 
diff --git a/drivers/net/virtio/virtio_net.h b/drivers/net/virtio/virtio_net.h
index d4e620a084f4..6e71622fca45 100644
--- a/drivers/net/virtio/virtio_net.h
+++ b/drivers/net/virtio/virtio_net.h
@@ -156,6 +156,11 @@  struct virtnet_rq {
 
 		/* xdp rxq used by xsk */
 		struct xdp_rxq_info xdp_rxq;
+
+		struct xdp_buff **xsk_buffs;
+		u32 nxt_idx;
+		u32 num;
+		u32 size;
 	} xsk;
 };
 
diff --git a/drivers/net/virtio/xsk.c b/drivers/net/virtio/xsk.c
index 973e783260c3..841fb078882a 100644
--- a/drivers/net/virtio/xsk.c
+++ b/drivers/net/virtio/xsk.c
@@ -37,6 +37,58 @@  static void virtnet_xsk_check_queue(struct virtnet_sq *sq)
 		netif_stop_subqueue(dev, qnum);
 }
 
+static int virtnet_add_recvbuf_batch(struct virtnet_info *vi, struct virtnet_rq *rq,
+				     struct xsk_buff_pool *pool, gfp_t gfp)
+{
+	struct xdp_buff **xsk_buffs;
+	dma_addr_t addr;
+	u32 len, i;
+	int err = 0;
+
+	xsk_buffs = rq->xsk.xsk_buffs;
+
+	if (rq->xsk.nxt_idx >= rq->xsk.num) {
+		rq->xsk.num = xsk_buff_alloc_batch(pool, xsk_buffs, rq->xsk.size);
+		if (!rq->xsk.num)
+			return -ENOMEM;
+		rq->xsk.nxt_idx = 0;
+	}
+
+	while (rq->xsk.nxt_idx < rq->xsk.num) {
+		i = rq->xsk.nxt_idx;
+
+		/* use the part of XDP_PACKET_HEADROOM as the virtnet hdr space */
+		addr = xsk_buff_xdp_get_dma(xsk_buffs[i]) - vi->hdr_len;
+		len = xsk_pool_get_rx_frame_size(pool) + vi->hdr_len;
+
+		sg_init_table(rq->sg, 1);
+		sg_fill_dma(rq->sg, addr, len);
+
+		err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, xsk_buffs[i], gfp);
+		if (err)
+			return err;
+
+		rq->xsk.nxt_idx++;
+	}
+
+	return 0;
+}
+
+int virtnet_add_recvbuf_xsk(struct virtnet_info *vi, struct virtnet_rq *rq,
+			    struct xsk_buff_pool *pool, gfp_t gfp)
+{
+	int err;
+
+	do {
+		err = virtnet_add_recvbuf_batch(vi, rq, pool, gfp);
+		if (err)
+			return err;
+
+	} while (rq->vq->num_free);
+
+	return 0;
+}
+
 static int virtnet_xsk_xmit_one(struct virtnet_sq *sq,
 				struct xsk_buff_pool *pool,
 				struct xdp_desc *desc)
@@ -244,7 +296,7 @@  static int virtnet_xsk_pool_enable(struct net_device *dev,
 	struct virtnet_sq *sq;
 	struct device *dma_dev;
 	dma_addr_t hdr_dma;
-	int err;
+	int err, size;
 
 	/* In big_packets mode, xdp cannot work, so there is no need to
 	 * initialize xsk of rq.
@@ -276,6 +328,16 @@  static int virtnet_xsk_pool_enable(struct net_device *dev,
 	if (!dma_dev)
 		return -EPERM;
 
+	size = virtqueue_get_vring_size(rq->vq);
+
+	rq->xsk.xsk_buffs = kcalloc(size, sizeof(*rq->xsk.xsk_buffs), GFP_KERNEL);
+	if (!rq->xsk.xsk_buffs)
+		return -ENOMEM;
+
+	rq->xsk.size = size;
+	rq->xsk.nxt_idx = 0;
+	rq->xsk.num = 0;
+
 	hdr_dma = dma_map_single(dma_dev, &xsk_hdr, vi->hdr_len, DMA_TO_DEVICE);
 	if (dma_mapping_error(dma_dev, hdr_dma))
 		return -ENOMEM;
@@ -338,6 +400,8 @@  static int virtnet_xsk_pool_disable(struct net_device *dev, u16 qid)
 	err1 = virtnet_sq_bind_xsk_pool(vi, sq, NULL);
 	err2 = virtnet_rq_bind_xsk_pool(vi, rq, NULL);
 
+	kfree(rq->xsk.xsk_buffs);
+
 	return err1 | err2;
 }
 
diff --git a/drivers/net/virtio/xsk.h b/drivers/net/virtio/xsk.h
index 7ebc9bda7aee..bef41a3f954e 100644
--- a/drivers/net/virtio/xsk.h
+++ b/drivers/net/virtio/xsk.h
@@ -23,4 +23,6 @@  int virtnet_xsk_pool_setup(struct net_device *dev, struct netdev_bpf *xdp);
 bool virtnet_xsk_xmit(struct virtnet_sq *sq, struct xsk_buff_pool *pool,
 		      int budget);
 int virtnet_xsk_wakeup(struct net_device *dev, u32 qid, u32 flag);
+int virtnet_add_recvbuf_xsk(struct virtnet_info *vi, struct virtnet_rq *rq,
+			    struct xsk_buff_pool *pool, gfp_t gfp);
 #endif