linux-kernel - [PATCH RFC 05/13] vhost/net: pass net specific struct pointer

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Date:   Tue, 2 Jun 2020 09:06:05 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Eugenio Pérez <eperezma@...hat.com>,
        Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [PATCH RFC 05/13] vhost/net: pass net specific struct pointer

In preparation for further cleanup, pass net specific pointer
to ubuf callbacks so we can move net specific fields
out to net structures.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/vhost/net.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 2927f02cc7e1..749a9cf51a59 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -94,7 +94,7 @@ struct vhost_net_ubuf_ref {
 	 */
 	atomic_t refcount;
 	wait_queue_head_t wait;
-	struct vhost_virtqueue *vq;
+	struct vhost_net_virtqueue *nvq;
 };
 
 #define VHOST_NET_BATCH 64
@@ -231,7 +231,7 @@ static void vhost_net_enable_zcopy(int vq)
 }
 
 static struct vhost_net_ubuf_ref *
-vhost_net_ubuf_alloc(struct vhost_virtqueue *vq, bool zcopy)
+vhost_net_ubuf_alloc(struct vhost_net_virtqueue *nvq, bool zcopy)
 {
 	struct vhost_net_ubuf_ref *ubufs;
 	/* No zero copy backend? Nothing to count. */
@@ -242,7 +242,7 @@ vhost_net_ubuf_alloc(struct vhost_virtqueue *vq, bool zcopy)
 		return ERR_PTR(-ENOMEM);
 	atomic_set(&ubufs->refcount, 1);
 	init_waitqueue_head(&ubufs->wait);
-	ubufs->vq = vq;
+	ubufs->nvq = nvq;
 	return ubufs;
 }
 
@@ -384,13 +384,13 @@ static void vhost_zerocopy_signal_used(struct vhost_net *net,
 static void vhost_zerocopy_callback(struct ubuf_info *ubuf, bool success)
 {
 	struct vhost_net_ubuf_ref *ubufs = ubuf->ctx;
-	struct vhost_virtqueue *vq = ubufs->vq;
+	struct vhost_net_virtqueue *nvq = ubufs->nvq;
 	int cnt;
 
 	rcu_read_lock_bh();
 
 	/* set len to mark this desc buffers done DMA */
-	vq->heads[ubuf->desc].len = success ?
+	nvq->vq.heads[ubuf->desc].in_len = success ?
 		VHOST_DMA_DONE_LEN : VHOST_DMA_FAILED_LEN;
 	cnt = vhost_net_ubuf_put(ubufs);
 
@@ -402,7 +402,7 @@ static void vhost_zerocopy_callback(struct ubuf_info *ubuf, bool success)
 	 * less than 10% of times).
 	 */
 	if (cnt <= 1 || !(cnt % 16))
-		vhost_poll_queue(&vq->poll);
+		vhost_poll_queue(&nvq->vq.poll);
 
 	rcu_read_unlock_bh();
 }
@@ -1525,7 +1525,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
 	/* start polling new socket */
 	oldsock = vhost_vq_get_backend(vq);
 	if (sock != oldsock) {
-		ubufs = vhost_net_ubuf_alloc(vq,
+		ubufs = vhost_net_ubuf_alloc(nvq,
 					     sock && vhost_sock_zcopy(sock));
 		if (IS_ERR(ubufs)) {
 			r = PTR_ERR(ubufs);
-- 
MST