libxdp: Make sure to set the the program autoload when loading a program

When loading an xdp_program, we just load the underlying BPF object;
however, if that has previously had autoload disabled on the program we're
trying to load, the program won't actually be loaded. Since the load
corresponds to a particular program this is surprising behaviour, so make
sure we turn on program autoload for the program we're working with before
loading the BPF object.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>

lib/libxdp/libxdp.c

@@ -1289,6 +1289,9 @@ static int xdp_program__load(struct xdp_program *prog)
 	if (!prog->bpf_obj)
 		return -EINVAL;
 
+	/* Make sure this program is loaded even if autoload was turned off */
+	bpf_program__set_autoload(prog->bpf_prog, true);
+
 	err = bpf_object__load(prog->bpf_obj);
 	if (err)
 		return err;