This is needed for further unification of bridge initialization in
net_init_tap() and net_init_bridge().

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Tested-by: Lei Yang <leiyang@redhat.com>
---
 net/tap.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/net/tap.c b/net/tap.c
index c007cd272a..7dc8f52831 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -679,15 +679,18 @@ static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr,
 
 #define MAX_TAP_QUEUES 1024
 
-static int net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
+static int net_init_tap_one(const Netdev *netdev, NetClientState *peer,
                             const char *model, const char *name,
                             const char *ifname, const char *script,
                             const char *downscript, const char *vhostfdname,
                             int vnet_hdr, int fd, Error **errp)
 {
+    const NetdevTapOptions *tap = &netdev->u.tap;
     TAPState *s = net_tap_fd_init(peer, model, name, fd, vnet_hdr);
     int vhostfd;
 
+    assert(netdev->type == NET_CLIENT_DRIVER_TAP);
+
     if (tap_set_sndbuf(s->fd, tap, errp) < 0) {
         goto failed;
     }
@@ -813,7 +816,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
             return -1;
         }
 
-        ret = net_init_tap_one(tap, peer, "tap", name, NULL,
+        ret = net_init_tap_one(netdev, peer, "tap", name, NULL,
                                NULL, NULL,
                                tap->vhostfd, vnet_hdr, fd, errp);
         if (ret < 0) {
@@ -862,7 +865,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
                 return -1;
             }
 
-            ret = net_init_tap_one(tap, peer, "tap", name, NULL,
+            ret = net_init_tap_one(netdev, peer, "tap", name, NULL,
                                    NULL, NULL,
                                    vhost_fds ? vhost_fds[i] : NULL,
                                    vnet_hdr, fd, errp);
@@ -892,7 +895,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
             return -1;
         }
 
-        ret = net_init_tap_one(tap, peer, "bridge", name, NULL,
+        ret = net_init_tap_one(netdev, peer, "bridge", name, NULL,
                                NULL, NULL, tap->vhostfd,
                                vnet_hdr, fd, errp);
         if (ret < 0) {
@@ -933,7 +936,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
                 return -1;
             }
 
-            ret = net_init_tap_one(tap, peer, "tap", name, ifname,
+            ret = net_init_tap_one(netdev, peer, "tap", name, ifname,
                                    i >= 1 ? "no" : script,
                                    i >= 1 ? "no" : downscript,
                                    tap->vhostfd, vnet_hdr, fd, errp);
-- 
2.48.1