1 files changed, 12 insertions, 0 deletions
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 037c5d7..cd27c09 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -1298,6 +1298,14 @@ static struct fuse_lowlevel_ops lo_oper = {
     .lseek = lo_lseek,
 };
 
+/* Print vhost-user.json backend program capabilities */
+static void print_capabilities(void)
+{
+    printf("{\n");
+    printf("  \"type\": \"fs\"\n");
+    printf("}\n");
+}
+
 int main(int argc, char *argv[])
 {
     struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
@@ -1328,6 +1336,10 @@ int main(int argc, char *argv[])
         fuse_lowlevel_version();
         ret = 0;
         goto err_out1;
+    } else if (opts.print_capabilities) {
+        print_capabilities();
+        ret = 0;
+        goto err_out1;
     }
 
     if (fuse_opt_parse(&args, &lo, lo_opts, NULL) == -1) {