Commit 247643f8 authored by Eugenio Pérez's avatar Eugenio Pérez Committed by Michael S. Tsirkin
Browse files

vhost: Create accessors for virtqueues private_data 



Signed-off-by: default avatarEugenio Pérez <eperezma@redhat.com>
Link: https://lore.kernel.org/r/20200331192804.6019-2-eperezma@redhat.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 21818ed0

drivers/vhost/net.c

+15 −13
Original line number Diff line number Diff line
@@ -424,7 +424,7 @@ static void vhost_net_disable_vq(struct vhost_net *n, 
	struct vhost_net_virtqueue *nvq =

		container_of(vq, struct vhost_net_virtqueue, vq);

	struct vhost_poll *poll = n->poll + (nvq - n->vqs);

	if (!vq->private_data)

	if (!vhost_vq_get_backend(vq))

		return;

	vhost_poll_stop(poll);

}
@@ -437,7 +437,7 @@ static int vhost_net_enable_vq(struct vhost_net *n, 
	struct vhost_poll *poll = n->poll + (nvq - n->vqs);

	struct socket *sock;



	sock = vq->private_data;

	sock = vhost_vq_get_backend(vq);

	if (!sock)

		return 0;
@@ -524,7 +524,7 @@ static void vhost_net_busy_poll(struct vhost_net *net, 
		return;



	vhost_disable_notify(&net->dev, vq);

	sock = rvq->private_data;

	sock = vhost_vq_get_backend(rvq);



	busyloop_timeout = poll_rx ? rvq->busyloop_timeout:

				     tvq->busyloop_timeout;
@@ -570,8 +570,10 @@ static int vhost_net_tx_get_vq_desc(struct vhost_net *net, 


	if (r == tvq->num && tvq->busyloop_timeout) {

		/* Flush batched packets first */

		if (!vhost_sock_zcopy(tvq->private_data))

			vhost_tx_batch(net, tnvq, tvq->private_data, msghdr);

		if (!vhost_sock_zcopy(vhost_vq_get_backend(tvq)))

			vhost_tx_batch(net, tnvq,

				       vhost_vq_get_backend(tvq),

				       msghdr);



		vhost_net_busy_poll(net, rvq, tvq, busyloop_intr, false);
@@ -685,7 +687,7 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq, 
	struct vhost_virtqueue *vq = &nvq->vq;

	struct vhost_net *net = container_of(vq->dev, struct vhost_net,

					     dev);

	struct socket *sock = vq->private_data;

	struct socket *sock = vhost_vq_get_backend(vq);

	struct page_frag *alloc_frag = &net->page_frag;

	struct virtio_net_hdr *gso;

	struct xdp_buff *xdp = &nvq->xdp[nvq->batched_xdp];
@@ -952,7 +954,7 @@ static void handle_tx(struct vhost_net *net) 
	struct socket *sock;



	mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_TX);

	sock = vq->private_data;

	sock = vhost_vq_get_backend(vq);

	if (!sock)

		goto out;
@@ -1121,7 +1123,7 @@ static void handle_rx(struct vhost_net *net) 
	int recv_pkts = 0;



	mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_RX);

	sock = vq->private_data;

	sock = vhost_vq_get_backend(vq);

	if (!sock)

		goto out;
@@ -1345,9 +1347,9 @@ static struct socket *vhost_net_stop_vq(struct vhost_net *n, 
		container_of(vq, struct vhost_net_virtqueue, vq);



	mutex_lock(&vq->mutex);

	sock = vq->private_data;

	sock = vhost_vq_get_backend(vq);

	vhost_net_disable_vq(n, vq);

	vq->private_data = NULL;

	vhost_vq_set_backend(vq, NULL);

	vhost_net_buf_unproduce(nvq);

	nvq->rx_ring = NULL;

	mutex_unlock(&vq->mutex);
@@ -1521,7 +1523,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) 
	}



	/* start polling new socket */

	oldsock = vq->private_data;

	oldsock = vhost_vq_get_backend(vq);

	if (sock != oldsock) {

		ubufs = vhost_net_ubuf_alloc(vq,

					     sock && vhost_sock_zcopy(sock));
@@ -1531,7 +1533,7 @@ 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_vq_set_backend(vq, sock);

		vhost_net_buf_unproduce(nvq);

		r = vhost_vq_init_access(vq);

		if (r)
@@ -1568,7 +1570,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) 
	return 0;



err_used:

	vq->private_data = oldsock;

	vhost_vq_set_backend(vq, oldsock);

	vhost_net_enable_vq(n, vq);

	if (ubufs)

		vhost_net_ubuf_put_wait_and_free(ubufs);

drivers/vhost/scsi.c

+7 −7
Original line number Diff line number Diff line
@@ -452,7 +452,7 @@ vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt) 
	unsigned out, in;

	int head, ret;



	if (!vq->private_data) {

	if (!vhost_vq_get_backend(vq)) {

		vs->vs_events_missed = true;

		return;

	}
@@ -892,7 +892,7 @@ vhost_scsi_get_req(struct vhost_virtqueue *vq, struct vhost_scsi_ctx *vc, 
	} else {

		struct vhost_scsi_tpg **vs_tpg, *tpg;



		vs_tpg = vq->private_data;	/* validated at handler entry */

		vs_tpg = vhost_vq_get_backend(vq);	/* validated at handler entry */



		tpg = READ_ONCE(vs_tpg[*vc->target]);

		if (unlikely(!tpg)) {
@@ -929,7 +929,7 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) 
	 * We can handle the vq only after the endpoint is setup by calling the

	 * VHOST_SCSI_SET_ENDPOINT ioctl.

	 */

	vs_tpg = vq->private_data;

	vs_tpg = vhost_vq_get_backend(vq);

	if (!vs_tpg)

		goto out;
@@ -1184,7 +1184,7 @@ vhost_scsi_ctl_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) 
	 * We can handle the vq only after the endpoint is setup by calling the

	 * VHOST_SCSI_SET_ENDPOINT ioctl.

	 */

	if (!vq->private_data)

	if (!vhost_vq_get_backend(vq))

		goto out;



	memset(&vc, 0, sizeof(vc));
@@ -1322,7 +1322,7 @@ static void vhost_scsi_evt_handle_kick(struct vhost_work *work) 
	struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev);



	mutex_lock(&vq->mutex);

	if (!vq->private_data)

	if (!vhost_vq_get_backend(vq))

		goto out;



	if (vs->vs_events_missed)
@@ -1460,7 +1460,7 @@ vhost_scsi_set_endpoint(struct vhost_scsi *vs, 
		for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {

			vq = &vs->vqs[i].vq;

			mutex_lock(&vq->mutex);

			vq->private_data = vs_tpg;

			vhost_vq_set_backend(vq, vs_tpg);

			vhost_vq_init_access(vq);

			mutex_unlock(&vq->mutex);

		}
@@ -1547,7 +1547,7 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs, 
		for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {

			vq = &vs->vqs[i].vq;

			mutex_lock(&vq->mutex);

			vq->private_data = NULL;

			vhost_vq_set_backend(vq, NULL);

			mutex_unlock(&vq->mutex);

		}

	}

drivers/vhost/test.c

+5 −5
Original line number Diff line number Diff line
@@ -49,7 +49,7 @@ static void handle_vq(struct vhost_test *n) 
	void *private;



	mutex_lock(&vq->mutex);

	private = vq->private_data;

	private = vhost_vq_get_backend(vq);

	if (!private) {

		mutex_unlock(&vq->mutex);

		return;
@@ -133,8 +133,8 @@ static void *vhost_test_stop_vq(struct vhost_test *n, 
	void *private;



	mutex_lock(&vq->mutex);

	private = vq->private_data;

	vq->private_data = NULL;

	private = vhost_vq_get_backend(vq);

	vhost_vq_set_backend(vq, NULL);

	mutex_unlock(&vq->mutex);

	return private;

}
@@ -198,8 +198,8 @@ static long vhost_test_run(struct vhost_test *n, int test) 
		priv = test ? n : NULL;



		/* start polling new socket */

		oldpriv = vq->private_data;

		vq->private_data = priv;

		oldpriv = vhost_vq_get_backend(vq);

		vhost_vq_set_backend(vq, priv);



		r = vhost_vq_init_access(&n->vqs[index]);

drivers/vhost/vhost.h

+27 −0
Original line number Diff line number Diff line
@@ -231,6 +231,33 @@ enum { 
			 (1ULL << VIRTIO_F_VERSION_1)

};



/**

 * vhost_vq_set_backend - Set backend.

 *

 * @vq            Virtqueue.

 * @private_data  The private data.

 *

 * Context: Need to call with vq->mutex acquired.

 */

static inline void vhost_vq_set_backend(struct vhost_virtqueue *vq,

					void *private_data)

{

	vq->private_data = private_data;

}



/**

 * vhost_vq_get_backend - Get backend.

 *

 * @vq            Virtqueue.

 *

 * Context: Need to call with vq->mutex acquired.

 * Return: Private data previously set with vhost_vq_set_backend.

 */

static inline void *vhost_vq_get_backend(struct vhost_virtqueue *vq)

{

	return vq->private_data;

}



static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit)

{

	return vq->acked_features & (1ULL << bit);

drivers/vhost/vsock.c

+7 −7
Original line number Diff line number Diff line
@@ -91,7 +91,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, 


	mutex_lock(&vq->mutex);



	if (!vq->private_data)

	if (!vhost_vq_get_backend(vq))

		goto out;



	/* Avoid further vmexits, we're already processing the virtqueue */
@@ -440,7 +440,7 @@ static void vhost_vsock_handle_tx_kick(struct vhost_work *work) 


	mutex_lock(&vq->mutex);



	if (!vq->private_data)

	if (!vhost_vq_get_backend(vq))

		goto out;



	vhost_disable_notify(&vsock->dev, vq);
@@ -533,8 +533,8 @@ static int vhost_vsock_start(struct vhost_vsock *vsock) 
			goto err_vq;

		}



		if (!vq->private_data) {

			vq->private_data = vsock;

		if (!vhost_vq_get_backend(vq)) {

			vhost_vq_set_backend(vq, vsock);

			ret = vhost_vq_init_access(vq);

			if (ret)

				goto err_vq;
@@ -547,14 +547,14 @@ static int vhost_vsock_start(struct vhost_vsock *vsock) 
	return 0;



err_vq:

	vq->private_data = NULL;

	vhost_vq_set_backend(vq, NULL);

	mutex_unlock(&vq->mutex);



	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {

		vq = &vsock->vqs[i];



		mutex_lock(&vq->mutex);

		vq->private_data = NULL;

		vhost_vq_set_backend(vq, NULL);

		mutex_unlock(&vq->mutex);

	}

err:
@@ -577,7 +577,7 @@ static int vhost_vsock_stop(struct vhost_vsock *vsock) 
		struct vhost_virtqueue *vq = &vsock->vqs[i];



		mutex_lock(&vq->mutex);

		vq->private_data = NULL;

		vhost_vq_set_backend(vq, NULL);

		mutex_unlock(&vq->mutex);

	}

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