diff -drupN a/samples/bpf/libbpf.c b/samples/bpf/libbpf.c
--- a/samples/bpf/libbpf.c	2018-08-06 17:23:04.000000000 +0300
+++ b/samples/bpf/libbpf.c	2022-06-12 05:28:14.000000000 +0300
@@ -104,6 +104,29 @@ int bpf_prog_load(enum bpf_prog_type pro
 	return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
 }
 
+int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
+		    unsigned int flags)
+{
+	union bpf_attr attr = {
+		.target_fd = target_fd,
+		.attach_bpf_fd = prog_fd,
+		.attach_type = type,
+		.attach_flags  = flags;
+	};
+
+	return syscall(__NR_bpf, BPF_PROG_ATTACH, &attr, sizeof(attr));
+}
+
+int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
+{
+	union bpf_attr attr = {
+		.target_fd = target_fd,
+		.attach_type = type,
+	};
+
+	return syscall(__NR_bpf, BPF_PROG_DETACH, &attr, sizeof(attr));
+}
+
 int bpf_obj_pin(int fd, const char *pathname)
 {
 	union bpf_attr attr = {