vhost: workaround the build dependency on mbuf header

rte_mbuf struct is something more likely will be used only in vhost-user
net driver, while we have made vhost-user generic enough that it can
be used for implementing other drivers (such as vhost-user SCSI), they
have also include <rte_mbuf.h>. Otherwise, the build will be broken.

We could workaround it by using forward declaration, so that other
non-net drivers won't need include <rte_mbuf.h>.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
index d482a72..7a586e4 100644 (file)
--- a/lib/librte_vhost/rte_vhost.h
+++ b/lib/librte_vhost/rte_vhost.h
@@ -354,6 +354,8 @@ int rte_vhost_get_ifname(int vid, char *buf, size_t len);
  */
 uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
 
+struct rte_mbuf;
+struct rte_mempool;
 /**
  * This function adds buffers to the virtio devices RX virtqueue. Buffers can
  * be received from the physical port or from another virtual device. A packet