vhost-user: disconnect on start failure

If the backend failed to start (for example feature negociation failed),
do not exit, but disconnect the char device instead. Slightly more
robust for reconnect case.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Tested-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Victor Kaplansky <victork@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/net/vhost-user.c b/net/vhost-user.c
index 4a7fd5fbd5e1c750b2a7258d53125b8cefaae1b6..41ddb4b9ca8a887b8960128c4d27eb4dad099b72 100644 (file)
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -202,7 +202,8 @@ static void net_vhost_user_event(void *opaque, int event)
         s->watch = qemu_chr_fe_add_watch(s->chr, G_IO_HUP,
                                          net_vhost_user_watch, s);
         if (vhost_user_start(queues, ncs) < 0) {
-            exit(1);
+            qemu_chr_disconnect(s->chr);
+            return;
         }
         qmp_set_link(name, true, &err);
         break;