[dpdk-dev] [PATCH 4/7] vhost: fold common message handlers

[Yuanhan Liu <yuanhan.liu@linux.intel.com>]

Due to history reason (that we have 2 vhost implementations), some
messages are handled in two calls: vhost specific implementation
handles it first and then invoke the common one to do another handling.

We have one implementation only now, we could write one method for
each message. Here fold those common handles to corresponding vhost
user handler.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
 lib/librte_vhost/vhost_user.c | 115 ++++++++++++------------------------------
 1 file changed, 31 insertions(+), 84 deletions(-)

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index c4714b7..ada0a63 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -426,87 +426,6 @@ vhost_set_vring_base(int vid, struct vhost_vring_state *state)
 	return 0;
 }
 
-/*
- * We send the virtio device our available ring last used index.
- */
-static int
-vhost_get_vring_base(int vid, uint32_t index,
-	struct vhost_vring_state *state)
-{
-	struct virtio_net *dev;
-
-	dev = get_device(vid);
-	if (dev == NULL)
-		return -1;
-
-	state->index = index;
-	/* State->index refers to the queue index. The txq is 1, rxq is 0. */
-	state->num = dev->virtqueue[state->index]->last_used_idx;
-
-	return 0;
-}
-
-/*
- * The virtio device sends an eventfd to interrupt the guest. This fd gets
- * copied into our process space.
- */
-static int
-vhost_set_vring_call(int vid, struct vhost_vring_file *file)
-{
-	struct virtio_net *dev;
-	struct vhost_virtqueue *vq;
-	uint32_t cur_qp_idx = file->index / VIRTIO_QNUM;
-
-	dev = get_device(vid);
-	if (dev == NULL)
-		return -1;
-
-	/*
-	 * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
-	 * we get, so we do vring queue pair allocation here.
-	 */
-	if (cur_qp_idx + 1 > dev->virt_qp_nb) {
-		if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
-			return -1;
-	}
-
-	/* file->index refers to the queue index. The txq is 1, rxq is 0. */
-	vq = dev->virtqueue[file->index];
-	assert(vq != NULL);
-
-	if (vq->callfd >= 0)
-		close(vq->callfd);
-
-	vq->callfd = file->fd;
-
-	return 0;
-}
-
-/*
- * The virtio device sends an eventfd that it can use to notify us.
- * This fd gets copied into our process space.
- */
-static int
-vhost_set_vring_kick(int vid, struct vhost_vring_file *file)
-{
-	struct virtio_net *dev;
-	struct vhost_virtqueue *vq;
-
-	dev = get_device(vid);
-	if (dev == NULL)
-		return -1;
-
-	/* file->index refers to the queue index. The txq is 1, rxq is 0. */
-	vq = dev->virtqueue[file->index];
-
-	if (vq->kickfd >= 0)
-		close(vq->kickfd);
-
-	vq->kickfd = file->fd;
-
-	return 0;
-}
-
 static int
 user_set_mem_table(int vid, struct VhostUserMsg *pmsg)
 {
@@ -671,6 +590,12 @@ static void
 user_set_vring_call(int vid, struct VhostUserMsg *pmsg)
 {
 	struct vhost_vring_file file;
+	struct virtio_net *dev = get_device(vid);
+	struct vhost_virtqueue *vq;
+	uint32_t cur_qp_idx;
+
+	if (!dev)
+		return;
 
 	file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
 	if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
@@ -679,7 +604,24 @@ user_set_vring_call(int vid, struct VhostUserMsg *pmsg)
 		file.fd = pmsg->fds[0];
 	RTE_LOG(INFO, VHOST_CONFIG,
 		"vring call idx:%d file:%d\n", file.index, file.fd);
-	vhost_set_vring_call(vid, &file);
+
+	/*
+	 * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
+	 * we get, so we do vring queue pair allocation here.
+	 */
+	cur_qp_idx = file.index / VIRTIO_QNUM;
+	if (cur_qp_idx + 1 > dev->virt_qp_nb) {
+		if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
+			return;
+	}
+
+	vq = dev->virtqueue[file.index];
+	assert(vq != NULL);
+
+	if (vq->callfd >= 0)
+		close(vq->callfd);
+
+	vq->callfd = file.fd;
 }
 
 /*
@@ -691,6 +633,7 @@ user_set_vring_kick(int vid, struct VhostUserMsg *pmsg)
 {
 	struct vhost_vring_file file;
 	struct virtio_net *dev = get_device(vid);
+	struct vhost_virtqueue *vq;
 
 	if (!dev)
 		return;
@@ -702,7 +645,11 @@ user_set_vring_kick(int vid, struct VhostUserMsg *pmsg)
 		file.fd = pmsg->fds[0];
 	RTE_LOG(INFO, VHOST_CONFIG,
 		"vring kick idx:%d file:%d\n", file.index, file.fd);
-	vhost_set_vring_kick(vid, &file);
+
+	vq = dev->virtqueue[file.index];
+	if (vq->kickfd >= 0)
+		close(vq->kickfd);
+	vq->kickfd = file.fd;
 
 	if (virtio_is_ready(dev) && !(dev->flags & VIRTIO_DEV_RUNNING)) {
 		if (notify_ops->new_device(vid) == 0)
@@ -727,7 +674,7 @@ user_get_vring_base(int vid, struct vhost_vring_state *state)
 	}
 
 	/* Here we are safe to get the last used index */
-	vhost_get_vring_base(vid, state->index, state);
+	state->num = dev->virtqueue[state->index]->last_used_idx;
 
 	RTE_LOG(INFO, VHOST_CONFIG,
 		"vring base idx:%d file:%d\n", state->index, state->num);
-- 
1.9.0