vnc: add display id to acl names

In case the display id is "default" (which is the one you get if you
don't explicitly assign one) we keep the old name scheme, without
display, for backward compatibility reasons.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NGonglei <arei.gonglei@huawei.com>

ui/vnc.c

@@ -3207,18 +3207,36 @@ void vnc_display_open(const char *id, const char *display, Error **errp)
 
 #ifdef CONFIG_VNC_TLS
     if (acl && x509 && vs->tls.x509verify) {
-        if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
+        char *aclname;
+
+        if (strcmp(vs->id, "default") == 0) {
+            aclname = g_strdup("vnc.x509dname");
+        } else {
+            aclname = g_strdup_printf("vnc.%s.x509dname", vs->id);
+        }
+        vs->tls.acl = qemu_acl_init(aclname);
+        if (!vs->tls.acl) {
             fprintf(stderr, "Failed to create x509 dname ACL\n");
             exit(1);
         }
+        g_free(aclname);
     }
 #endif
 #ifdef CONFIG_VNC_SASL
     if (acl && sasl) {
-        if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) {
+        char *aclname;
+
+        if (strcmp(vs->id, "default") == 0) {
+            aclname = g_strdup("vnc.username");
+        } else {
+            aclname = g_strdup_printf("vnc.%s.username", vs->id);
+        }
+        vs->sasl.acl = qemu_acl_init(aclname);
+        if (!vs->sasl.acl) {
             fprintf(stderr, "Failed to create username ACL\n");
             exit(1);
         }
+        g_free(aclname);
     }
 #endif