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Commit bcf34adc authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'vhost_net-ptr_ring-fixes' 



Jason Wang says:

====================
Several fixes for vhost_net ptr_ring usage

This small series try to fix several bugs of ptr_ring usage in
vhost_net. Please review.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents d06cbe9c 3a403076

drivers/net/tun.c

+2 −1
Original line number Diff line number Diff line
@@ -655,7 +655,7 @@ static struct tun_struct *tun_enable_queue(struct tun_file *tfile) 
	return tun;

}



static void tun_ptr_free(void *ptr)

void tun_ptr_free(void *ptr)

{

	if (!ptr)

		return;
@@ -667,6 +667,7 @@ static void tun_ptr_free(void *ptr) 
		__skb_array_destroy_skb(ptr);

	}

}

EXPORT_SYMBOL_GPL(tun_ptr_free);



static void tun_queue_purge(struct tun_file *tfile)

{

drivers/vhost/net.c

+5 −3
Original line number Diff line number Diff line
@@ -170,7 +170,7 @@ static void vhost_net_buf_unproduce(struct vhost_net_virtqueue *nvq) 
	if (nvq->rx_ring && !vhost_net_buf_is_empty(rxq)) {

		ptr_ring_unconsume(nvq->rx_ring, rxq->queue + rxq->head,

				   vhost_net_buf_get_size(rxq),

				   __skb_array_destroy_skb);

				   tun_ptr_free);

		rxq->head = rxq->tail = 0;

	}

}
@@ -948,6 +948,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) 
		n->vqs[i].done_idx = 0;

		n->vqs[i].vhost_hlen = 0;

		n->vqs[i].sock_hlen = 0;

		n->vqs[i].rx_ring = NULL;

		vhost_net_buf_init(&n->vqs[i].rxq);

	}

	vhost_dev_init(dev, vqs, VHOST_NET_VQ_MAX);
@@ -972,6 +973,7 @@ static struct socket *vhost_net_stop_vq(struct vhost_net *n, 
	vhost_net_disable_vq(n, vq);

	vq->private_data = NULL;

	vhost_net_buf_unproduce(nvq);

	nvq->rx_ring = NULL;

	mutex_unlock(&vq->mutex);

	return sock;

}
@@ -1161,14 +1163,14 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) 
		vhost_net_disable_vq(n, vq);

		vq->private_data = sock;

		vhost_net_buf_unproduce(nvq);

		if (index == VHOST_NET_VQ_RX)

			nvq->rx_ring = get_tap_ptr_ring(fd);

		r = vhost_vq_init_access(vq);

		if (r)

			goto err_used;

		r = vhost_net_enable_vq(n, vq);

		if (r)

			goto err_used;

		if (index == VHOST_NET_VQ_RX)

			nvq->rx_ring = get_tap_ptr_ring(fd);



		oldubufs = nvq->ubufs;

		nvq->ubufs = ubufs;

include/linux/if_tun.h

+4 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ struct ptr_ring *tun_get_tx_ring(struct file *file); 
bool tun_is_xdp_buff(void *ptr);

void *tun_xdp_to_ptr(void *ptr);

void *tun_ptr_to_xdp(void *ptr);

void tun_ptr_free(void *ptr);

#else

#include <linux/err.h>

#include <linux/errno.h>
@@ -50,5 +51,8 @@ static inline void *tun_ptr_to_xdp(void *ptr) 
{

	return NULL;

}

static inline void tun_ptr_free(void *ptr)

{

}

#endif /* CONFIG_TUN */

#endif /* __IF_TUN_H */