[dpdk-stable] [PATCH 17.11 1/3] vhost: restore mbuf first when freeing zmbuf

[Tiwei Bie <tiwei.bie@intel.com>]

[ backported from upstream commit 041d37b2ef25faeb1c00ed70a5fc2ea6e93c4828 ]

The mbufs should also be restored in free_zmbufs().

Fixes: b0a985d1f340 ("vhost: add dequeue zero copy")
Fixes: 3ebd930588b7 ("vhost: fix mbuf free")

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/librte_vhost/vhost.h      | 16 ++++++++++++++++
 lib/librte_vhost/vhost_user.c |  1 +
 lib/librte_vhost/virtio_net.c | 16 ----------------
 3 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 11ce27118..c9e86a2c9 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -513,4 +513,20 @@ vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
 	return __vhost_iova_to_vva(dev, vq, iova, len, perm);
 }
 
+static __rte_always_inline void
+restore_mbuf(struct rte_mbuf *m)
+{
+	uint32_t mbuf_size, priv_size;
+
+	while (m) {
+		priv_size = rte_pktmbuf_priv_size(m->pool);
+		mbuf_size = sizeof(struct rte_mbuf) + priv_size;
+		/* start of buffer is after mbuf structure and priv data */
+
+		m->buf_addr = (char *)m + mbuf_size;
+		m->buf_iova = rte_mempool_virt2iova(m) + mbuf_size;
+		m = m->next;
+	}
+}
+
 #endif /* _VHOST_NET_CDEV_H_ */
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 84c18f965..7c0d8c6e4 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -888,6 +888,7 @@ free_zmbufs(struct vhost_virtqueue *vq)
 	     zmbuf != NULL; zmbuf = next) {
 		next = TAILQ_NEXT(zmbuf, next);
 
+		restore_mbuf(zmbuf->mbuf);
 		rte_pktmbuf_free(zmbuf->mbuf);
 		TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
 	}
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 07d4609ee..e3d50c96b 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -1466,22 +1466,6 @@ mbuf_is_consumed(struct rte_mbuf *m)
 	return true;
 }
 
-static __rte_always_inline void
-restore_mbuf(struct rte_mbuf *m)
-{
-	uint32_t mbuf_size, priv_size;
-
-	while (m) {
-		priv_size = rte_pktmbuf_priv_size(m->pool);
-		mbuf_size = sizeof(struct rte_mbuf) + priv_size;
-		/* start of buffer is after mbuf structure and priv data */
-
-		m->buf_addr = (char *)m + mbuf_size;
-		m->buf_iova = rte_mempool_virt2iova(m) + mbuf_size;
-		m = m->next;
-	}
-}
-
 uint16_t
 rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
 	struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count)
-- 
2.17.1