[PATCH v3 4/6] vdpa: validate MQ CVQ commands

["Eugenio Pérez" <eperezma@redhat.com>]

So we are sure we can update the device model properly before sending to
the device.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 net/vhost-vdpa.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 3950e4f25d..c6cbe2fb5c 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -486,6 +486,15 @@ static bool vhost_vdpa_net_cvq_validate_cmd(const void *out_buf, size_t len)
                           __func__, ctrl.cmd);
         };
         break;
+    case VIRTIO_NET_CTRL_MQ:
+        switch (ctrl.cmd) {
+        case VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET:
+            return true;
+        default:
+            qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid mq cmd %u\n",
+                          __func__, ctrl.cmd);
+        };
+        break;
     default:
         qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid control class %u\n",
                       __func__, ctrl.class);
-- 
2.31.1