From 3cd9d637bea74d9f95bca56523860ab2beb5e8a1 Mon Sep 17 00:00:00 2001
From: Daniel Borkmann <daniel@iogearbox.net>
Date: Mon, 1 May 2023 14:10:39 +0000
Subject: [PATCH] selftests/bpf: Add mprog tests around BPF tc opts

  ./test_progs -t tc_link
  [    1.409177] tsc: Refined TSC clocksource calibration: 3407.991 MHz
  [    1.411604] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fcb8dbdf, max_idle_ns: 440795301826 ns
  [    1.415577] clocksource: Switched to clocksource tsc
  [    1.430401] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.432324] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  #220     tc_link_opts_after:OK
  #221     tc_link_opts_basic:OK
  #222     tc_link_opts_before:OK
  #223     tc_link_opts_both:OK
  #224     tc_link_opts_chain_classic:OK
  #225     tc_link_opts_first:OK
  #226     tc_link_opts_invalid:OK
  #227     tc_link_opts_last:OK
  #228     tc_link_opts_replace:OK
  #229     tc_link_opts_revision:OK
  Summary: 10/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 .../selftests/bpf/prog_tests/tc_link.c        | 1490 +++++++++++++++++
 .../selftests/bpf/progs/test_tc_link.c        |   40 +
 2 files changed, 1530 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/tc_link.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_tc_link.c

diff --git a/tools/testing/selftests/bpf/prog_tests/tc_link.c b/tools/testing/selftests/bpf/prog_tests/tc_link.c
new file mode 100644
index 00000000000000..5c3b49832ab978
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/tc_link.c
@@ -0,0 +1,1490 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2022 Isovalent */
+#include <uapi/linux/if_link.h>
+#include <test_progs.h>
+
+#include "test_tc_link.skel.h"
+
+#define loopback	1
+#define ping_cmd	"ping -q -c1 -w1 127.0.0.1 > /dev/null"
+
+static __u32 id_from_prog_fd(int fd)
+{
+	struct bpf_prog_info prog_info = {};
+	__u32 prog_info_len = sizeof(prog_info);
+	int err;
+
+	err = bpf_obj_get_info_by_fd(fd, &prog_info, &prog_info_len);
+	if (!ASSERT_OK(err, "id_from_prog_fd"))
+		return 0;
+
+	ASSERT_NEQ(prog_info.id, 0, "prog_info.id");
+	return prog_info.id;
+}
+
+static void __assert_mprog_count(int target, int expected, bool miniq)
+{
+	__u32 count = 0, attach_flags = 0;
+	int err;
+
+	err = bpf_prog_query(loopback, target, 0, &attach_flags,
+			     NULL, &count);
+	ASSERT_EQ(count, expected, "count");
+	if (!expected && !miniq)
+		ASSERT_EQ(err, -ENOENT, "prog_query");
+	else
+		ASSERT_EQ(err, 0, "prog_query");
+}
+
+static void assert_mprog_count(int target, int expected)
+{
+	__assert_mprog_count(target, expected, false);
+}
+
+/* Test:
+ *
+ * Basic test which attaches a prog to ingress/egress, validates
+ * that the prog got attached, runs traffic through the programs,
+ * validates that traffic has been seen, and detaches everything
+ * again. Programs are attached without special flags.
+ */
+void serial_test_tc_link_opts_basic(void)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, id1, id2;
+	struct test_tc_link *skel;
+	__u32 prog_ids[2];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+
+	assert_mprog_count(BPF_TCX_INGRESS, 0);
+	assert_mprog_count(BPF_TCX_EGRESS, 0);
+
+	ASSERT_EQ(skel->bss->seen_tc1, false, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2");
+
+	err = bpf_prog_attach_opts(fd1, loopback, BPF_TCX_INGRESS, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(BPF_TCX_INGRESS, 1);
+	assert_mprog_count(BPF_TCX_EGRESS, 0);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	optq.prog_ids = prog_ids;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, BPF_TCX_INGRESS, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_in;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 2, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2");
+
+	err = bpf_prog_attach_opts(fd2, loopback, BPF_TCX_EGRESS, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_in;
+
+	assert_mprog_count(BPF_TCX_INGRESS, 1);
+	assert_mprog_count(BPF_TCX_EGRESS, 1);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	optq.prog_ids = prog_ids;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, BPF_TCX_EGRESS, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_eg;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 2, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id2, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+
+cleanup_eg:
+	err = bpf_prog_detach_opts(fd2, loopback, BPF_TCX_EGRESS, &optd);
+	ASSERT_OK(err, "prog_detach_eg");
+
+	assert_mprog_count(BPF_TCX_INGRESS, 1);
+	assert_mprog_count(BPF_TCX_EGRESS, 0);
+
+cleanup_in:
+	err = bpf_prog_detach_opts(fd1, loopback, BPF_TCX_INGRESS, &optd);
+	ASSERT_OK(err, "prog_detach_in");
+
+	assert_mprog_count(BPF_TCX_INGRESS, 0);
+	assert_mprog_count(BPF_TCX_EGRESS, 0);
+
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+static void test_tc_link_opts_first_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, id1, id2;
+	struct test_tc_link *skel;
+	__u32 prog_ids[3];
+	__u32 prog_flags[3];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_FIRST;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 2, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	opta.flags = BPF_F_FIRST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_BEFORE;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_BEFORE | BPF_F_ID;
+	opta.relative_id = id1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id2, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	optd.flags = 0;
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	if (!ASSERT_OK(err, "prog_detach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_LAST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 5, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id2, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], BPF_F_LAST, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+cleanup_target2:
+	optd.flags = 0;
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+
+	assert_mprog_count(target, 1);
+cleanup_target:
+	optd.flags = BPF_F_FIRST;
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress with first flag set,
+ * validates that the prog got attached, other attach attempts for
+ * this position should fail. Regular attach attempts or with last
+ * flag set should succeed. Detach everything again.
+ */
+void serial_test_tc_link_opts_first(void)
+{
+	test_tc_link_opts_first_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_first_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_opts_last_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, id1, id2;
+	struct test_tc_link *skel;
+	__u32 prog_ids[3];
+	__u32 prog_flags[3];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_LAST;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 2, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_LAST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	opta.flags = BPF_F_LAST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_AFTER;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_AFTER | BPF_F_ID;
+	opta.relative_id = id1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id2, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id1, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], BPF_F_LAST, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	optd.flags = 0;
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	if (!ASSERT_OK(err, "prog_detach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_FIRST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 5, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id2, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id1, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], BPF_F_LAST, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+cleanup_target2:
+	optd.flags = 0;
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+
+	assert_mprog_count(target, 1);
+
+cleanup_target:
+	optd.flags = BPF_F_LAST;
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress with last flag set,
+ * validates that the prog got attached, other attach attempts for
+ * this position should fail. Regular attach attempts or with first
+ * flag set should succeed. Detach everything again.
+ */
+void serial_test_tc_link_opts_last(void)
+{
+	test_tc_link_opts_last_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_last_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_opts_both_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, id1, id2, detach_fd;
+	struct test_tc_link *skel;
+	__u32 prog_ids[3];
+	__u32 prog_flags[3];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+
+	assert_mprog_count(target, 0);
+
+	detach_fd = fd1;
+
+	opta.flags = BPF_F_FIRST | BPF_F_LAST;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 2, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST | BPF_F_LAST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	opta.flags = BPF_F_LAST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_FIRST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_AFTER;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_AFTER | BPF_F_ID;
+	opta.relative_id = id1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_BEFORE;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_BEFORE | BPF_F_ID;
+	opta.relative_id = id1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_FIRST | BPF_F_LAST;
+	opta.relative_fd = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	ASSERT_EQ(err, -EBUSY, "prog_attach");
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_FIRST | BPF_F_LAST | BPF_F_REPLACE;
+	opta.replace_fd = fd1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 1);
+
+	detach_fd = fd2;
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id2, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST | BPF_F_LAST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+cleanup_target:
+	optd.flags = BPF_F_FIRST | BPF_F_LAST;
+	err = bpf_prog_detach_opts(detach_fd, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress with first and last
+ * flag set, validates that the prog got attached, other attach
+ * attempts should fail. Replace should work. Detach everything
+ * again.
+ */
+void serial_test_tc_link_opts_both(void)
+{
+	test_tc_link_opts_both_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_both_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_opts_before_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, fd3, fd4, id1, id2, id3, id4;
+	struct test_tc_link *skel;
+	__u32 prog_ids[5];
+	__u32 prog_flags[5];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+	fd3 = bpf_program__fd(skel->progs.tc3);
+	fd4 = bpf_program__fd(skel->progs.tc4);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+	id3 = id_from_prog_fd(fd3);
+	id4 = id_from_prog_fd(fd4);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+	ASSERT_NEQ(id3, id4, "prog_ids_3_4");
+	ASSERT_NEQ(id2, id3, "prog_ids_2_3");
+
+	assert_mprog_count(target, 0);
+
+	opta.flags = 0;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id2, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3");
+	ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4");
+
+	opta.flags = BPF_F_BEFORE;
+	opta.relative_fd = fd2;
+	err = bpf_prog_attach_opts(fd3, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target2;
+
+	opta.flags = BPF_F_BEFORE | BPF_F_ID;
+	opta.relative_id = id1;
+	err = bpf_prog_attach_opts(fd4, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target3;
+
+	assert_mprog_count(target, 4);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target4;
+
+	ASSERT_EQ(optq.count, 4, "count");
+	ASSERT_EQ(optq.revision, 5, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id4, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id1, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], id3, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+	ASSERT_EQ(optq.prog_ids[3], id2, "prog_ids[3]");
+	ASSERT_EQ(optq.prog_attach_flags[3], 0, "prog_flags[3]");
+	ASSERT_EQ(optq.prog_ids[4], 0, "prog_ids[4]");
+	ASSERT_EQ(optq.prog_attach_flags[4], 0, "prog_flags[4]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3");
+	ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4");
+
+cleanup_target4:
+	err = bpf_prog_detach_opts(fd4, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 3);
+cleanup_target3:
+	err = bpf_prog_detach_opts(fd3, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 2);
+cleanup_target2:
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 1);
+cleanup_target:
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress with before flag
+ * set, validates that the prog got attached in the right location.
+ * The first test inserts in the middle, then we insert to the front.
+ * Detach everything again.
+ */
+void serial_test_tc_link_opts_before(void)
+{
+	test_tc_link_opts_before_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_before_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_opts_after_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, fd3, fd4, id1, id2, id3, id4;
+	struct test_tc_link *skel;
+	__u32 prog_ids[5];
+	__u32 prog_flags[5];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+	fd3 = bpf_program__fd(skel->progs.tc3);
+	fd4 = bpf_program__fd(skel->progs.tc4);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+	id3 = id_from_prog_fd(fd3);
+	id4 = id_from_prog_fd(fd4);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+	ASSERT_NEQ(id3, id4, "prog_ids_3_4");
+	ASSERT_NEQ(id2, id3, "prog_ids_2_3");
+
+	assert_mprog_count(target, 0);
+
+	opta.flags = 0;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id2, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3");
+	ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4");
+
+	opta.flags = BPF_F_AFTER;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd3, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target2;
+
+	opta.flags = BPF_F_AFTER | BPF_F_ID;
+	opta.relative_id = id2;
+	err = bpf_prog_attach_opts(fd4, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target3;
+
+	assert_mprog_count(target, 4);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target4;
+
+	ASSERT_EQ(optq.count, 4, "count");
+	ASSERT_EQ(optq.revision, 5, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id3, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], id2, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+	ASSERT_EQ(optq.prog_ids[3], id4, "prog_ids[3]");
+	ASSERT_EQ(optq.prog_attach_flags[3], 0, "prog_flags[3]");
+	ASSERT_EQ(optq.prog_ids[4], 0, "prog_ids[4]");
+	ASSERT_EQ(optq.prog_attach_flags[4], 0, "prog_flags[4]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3");
+	ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4");
+
+cleanup_target4:
+	err = bpf_prog_detach_opts(fd4, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 3);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target3;
+
+	ASSERT_EQ(optq.count, 3, "count");
+	ASSERT_EQ(optq.revision, 6, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id3, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], id2, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+	ASSERT_EQ(optq.prog_ids[3], 0, "prog_ids[3]");
+	ASSERT_EQ(optq.prog_attach_flags[3], 0, "prog_flags[3]");
+
+cleanup_target3:
+	err = bpf_prog_detach_opts(fd3, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 7, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id2, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+cleanup_target2:
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 1);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target;
+
+	ASSERT_EQ(optq.count, 1, "count");
+	ASSERT_EQ(optq.revision, 8, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+
+cleanup_target:
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress with after flag
+ * set, validates that the prog got attached in the right location.
+ * The first test inserts in the middle, then we insert to the end.
+ * Detach everything again.
+ */
+void serial_test_tc_link_opts_after(void)
+{
+	test_tc_link_opts_after_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_after_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_opts_revision_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, id1, id2;
+	struct test_tc_link *skel;
+	__u32 prog_ids[3];
+	__u32 prog_flags[3];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+
+	assert_mprog_count(target, 0);
+
+	opta.flags = 0;
+	opta.expected_revision = 1;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	opta.expected_revision = 1;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, -ESTALE, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = 0;
+	opta.expected_revision = 2;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id1, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id2, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+
+	optd.expected_revision = 2;
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	ASSERT_EQ(err, -ESTALE, "prog_detach");
+	assert_mprog_count(target, 2);
+
+cleanup_target2:
+	optd.expected_revision = 3;
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 1);
+
+cleanup_target:
+	optd.expected_revision = 0;
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress with revision count
+ * set, validates that the prog got attached and validate that
+ * when the count mismatches that the operation bails out. Detach
+ * everything again.
+ */
+void serial_test_tc_link_opts_revision(void)
+{
+	test_tc_link_opts_revision_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_revision_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_chain_classic(int target, bool chain_tc_old)
+{
+	DECLARE_LIBBPF_OPTS(bpf_tc_opts, tc_opts, .handle = 1, .priority = 1);
+	DECLARE_LIBBPF_OPTS(bpf_tc_hook, tc_hook, .ifindex = loopback);
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	bool hook_created = false, tc_attached = false;
+	__u32 fd1, fd2, fd3, id1, id2, id3;
+	struct test_tc_link *skel;
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+	fd3 = bpf_program__fd(skel->progs.tc3);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+	id3 = id_from_prog_fd(fd3);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+	ASSERT_NEQ(id2, id3, "prog_ids_2_3");
+
+	assert_mprog_count(target, 0);
+
+	if (chain_tc_old) {
+		tc_hook.attach_point = target == BPF_TCX_INGRESS ?
+				       BPF_TC_INGRESS : BPF_TC_EGRESS;
+		err = bpf_tc_hook_create(&tc_hook);
+		if (err == 0)
+			hook_created = true;
+		err = err == -EEXIST ? 0 : err;
+		if (!ASSERT_OK(err, "bpf_tc_hook_create"))
+			goto cleanup;
+
+		tc_opts.prog_fd = fd3;
+		err = bpf_tc_attach(&tc_hook, &tc_opts);
+		if (!ASSERT_OK(err, "bpf_tc_attach"))
+			goto cleanup;
+		tc_attached = true;
+	}
+
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_detach;
+
+	assert_mprog_count(target, 2);
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, chain_tc_old, "seen_tc3");
+
+	skel->bss->seen_tc1 = false;
+	skel->bss->seen_tc2 = false;
+	skel->bss->seen_tc3 = false;
+
+	err = bpf_prog_detach_opts(fd2, loopback, target, &optd);
+	if (!ASSERT_OK(err, "prog_detach"))
+		goto cleanup_detach;
+
+	assert_mprog_count(target, 1);
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, chain_tc_old, "seen_tc3");
+
+cleanup_detach:
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	if (!ASSERT_OK(err, "prog_detach"))
+		goto cleanup;
+
+	__assert_mprog_count(target, 0, chain_tc_old);
+cleanup:
+	if (tc_attached) {
+		tc_opts.flags = tc_opts.prog_fd = tc_opts.prog_id = 0;
+		err = bpf_tc_detach(&tc_hook, &tc_opts);
+		ASSERT_OK(err, "bpf_tc_detach");
+	}
+	if (hook_created) {
+		tc_hook.attach_point = BPF_TC_INGRESS | BPF_TC_EGRESS;
+		bpf_tc_hook_destroy(&tc_hook);
+	}
+	test_tc_link__destroy(skel);
+	assert_mprog_count(target, 0);
+}
+
+/* Test:
+ *
+ * Test which attaches two progs to ingress/egress through the new
+ * API and one prog via classic API. Traffic runs through and it
+ * validates that the program has been executed. One of the two
+ * progs gets removed and test is rerun again. Detach everything
+ * at the end.
+ */
+void serial_test_tc_link_opts_chain_classic(void)
+{
+	test_tc_link_chain_classic(BPF_TCX_INGRESS, false);
+	test_tc_link_chain_classic(BPF_TCX_EGRESS, false);
+	test_tc_link_chain_classic(BPF_TCX_INGRESS, true);
+	test_tc_link_chain_classic(BPF_TCX_EGRESS, true);
+}
+
+static void test_tc_link_opts_replace_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	DECLARE_LIBBPF_OPTS(bpf_prog_query_opts,  optq);
+	__u32 fd1, fd2, fd3, id1, id2, id3, detach_fd;
+	struct test_tc_link *skel;
+	__u32 prog_ids[4];
+	__u32 prog_flags[4];
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+	fd3 = bpf_program__fd(skel->progs.tc3);
+
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+	id3 = id_from_prog_fd(fd3);
+
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+	ASSERT_NEQ(id2, id3, "prog_ids_2_3");
+
+	assert_mprog_count(target, 0);
+
+	opta.flags = 0;
+	opta.expected_revision = 1;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup;
+
+	assert_mprog_count(target, 1);
+
+	opta.flags = BPF_F_BEFORE | BPF_F_FIRST | BPF_F_ID;
+	opta.relative_id = id1;
+	opta.expected_revision = 2;
+	err = bpf_prog_attach_opts(fd2, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target;
+
+	detach_fd = fd2;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 3, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id2, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id1, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3");
+
+	skel->bss->seen_tc1 = false;
+	skel->bss->seen_tc2 = false;
+	skel->bss->seen_tc3 = false;
+
+	opta.flags = BPF_F_REPLACE;
+	opta.replace_fd = fd2;
+	opta.expected_revision = 3;
+	err = bpf_prog_attach_opts(fd3, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target2;
+
+	detach_fd = fd3;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 4, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id3, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], 0, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id1, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3");
+
+	skel->bss->seen_tc1 = false;
+	skel->bss->seen_tc2 = false;
+	skel->bss->seen_tc3 = false;
+
+	opta.flags = BPF_F_FIRST | BPF_F_REPLACE;
+	opta.replace_fd = fd3;
+	opta.expected_revision = 4;
+	err = bpf_prog_attach_opts(fd3, loopback, target, &opta);
+	if (!ASSERT_EQ(err, 0, "prog_attach"))
+		goto cleanup_target2;
+
+	assert_mprog_count(target, 2);
+
+	memset(prog_ids, 0, sizeof(prog_ids));
+	memset(prog_flags, 0, sizeof(prog_flags));
+	optq.prog_ids = prog_ids;
+	optq.prog_attach_flags = prog_flags;
+	optq.count = ARRAY_SIZE(prog_ids);
+
+	err = bpf_prog_query_opts(loopback, target, &optq);
+	if (!ASSERT_OK(err, "prog_query"))
+		goto cleanup_target2;
+
+	ASSERT_EQ(optq.count, 2, "count");
+	ASSERT_EQ(optq.revision, 5, "revision");
+	ASSERT_EQ(optq.prog_ids[0], id3, "prog_ids[0]");
+	ASSERT_EQ(optq.prog_attach_flags[0], BPF_F_FIRST, "prog_flags[0]");
+	ASSERT_EQ(optq.prog_ids[1], id1, "prog_ids[1]");
+	ASSERT_EQ(optq.prog_attach_flags[1], 0, "prog_flags[1]");
+	ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]");
+	ASSERT_EQ(optq.prog_attach_flags[2], 0, "prog_flags[2]");
+
+	ASSERT_OK(system(ping_cmd), ping_cmd);
+
+	ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1");
+	ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2");
+	ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3");
+
+	opta.flags = BPF_F_LAST | BPF_F_REPLACE;
+	opta.replace_fd = fd3;
+	opta.expected_revision = 5;
+	err = bpf_prog_attach_opts(fd3, loopback, target, &opta);
+	ASSERT_EQ(err, -EACCES, "prog_attach");
+	assert_mprog_count(target, 2);
+
+	opta.flags = BPF_F_FIRST | BPF_F_LAST | BPF_F_REPLACE;
+	opta.replace_fd = fd3;
+	opta.expected_revision = 5;
+	err = bpf_prog_attach_opts(fd3, loopback, target, &opta);
+	ASSERT_EQ(err, -EACCES, "prog_attach");
+	assert_mprog_count(target, 2);
+
+	optd.flags = BPF_F_FIRST | BPF_F_BEFORE | BPF_F_ID;
+	optd.relative_id = id1;
+	optd.expected_revision = 5;
+cleanup_target2:
+	err = bpf_prog_detach_opts(detach_fd, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 1);
+
+cleanup_target:
+	optd.flags = 0;
+	optd.relative_id = 0;
+	optd.expected_revision = 0;
+	err = bpf_prog_detach_opts(fd1, loopback, target, &optd);
+	ASSERT_OK(err, "prog_detach");
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test which attaches a prog to ingress/egress and validates
+ * replacement in combination with various flags. Similar for
+ * later detachment.
+ */
+void serial_test_tc_link_opts_replace(void)
+{
+	test_tc_link_opts_replace_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_replace_target(BPF_TCX_EGRESS);
+}
+
+static void test_tc_link_opts_invalid_target(int target)
+{
+	DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opta);
+	DECLARE_LIBBPF_OPTS(bpf_prog_detach_opts, optd);
+	__u32 fd1, fd2, id1, id2;
+	struct test_tc_link *skel;
+	int err;
+
+	skel = test_tc_link__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto cleanup;
+
+	fd1 = bpf_program__fd(skel->progs.tc1);
+	fd2 = bpf_program__fd(skel->progs.tc2);
+	id1 = id_from_prog_fd(fd1);
+	id2 = id_from_prog_fd(fd2);
+	ASSERT_NEQ(id1, id2, "prog_ids_1_2");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_BEFORE;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_BEFORE | BPF_F_AFTER;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_BEFORE | BPF_F_ID;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -ENOENT, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_AFTER | BPF_F_ID;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -ENOENT, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_LAST | BPF_F_BEFORE;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_FIRST | BPF_F_AFTER;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_FIRST | BPF_F_LAST;
+	opta.relative_fd = fd2;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = 0;
+	opta.relative_fd = fd2;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_BEFORE | BPF_F_AFTER;
+	opta.relative_fd = fd2;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_ID;
+	opta.relative_id = id2;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -EINVAL, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_BEFORE;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -ENOENT, "prog_attach");
+	assert_mprog_count(target, 0);
+
+	opta.flags = BPF_F_AFTER;
+	opta.relative_fd = fd1;
+	err = bpf_prog_attach_opts(fd1, loopback, target, &opta);
+	ASSERT_EQ(err, -ENOENT, "prog_attach");
+	assert_mprog_count(target, 0);
+cleanup:
+	test_tc_link__destroy(skel);
+}
+
+/* Test:
+ *
+ * Test invalid flag combinations when attaching/detaching a
+ * program.
+ */
+void serial_test_tc_link_opts_invalid(void)
+{
+	test_tc_link_opts_invalid_target(BPF_TCX_INGRESS);
+	test_tc_link_opts_invalid_target(BPF_TCX_EGRESS);
+}
diff --git a/tools/testing/selftests/bpf/progs/test_tc_link.c b/tools/testing/selftests/bpf/progs/test_tc_link.c
new file mode 100644
index 00000000000000..618acd6fdbeed3
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_tc_link.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2023 Isovalent */
+#include <stdbool.h>
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+char LICENSE[] SEC("license") = "GPL";
+
+bool seen_tc1;
+bool seen_tc2;
+bool seen_tc3;
+bool seen_tc4;
+
+SEC("tc/ingress")
+int tc1(struct __sk_buff *skb)
+{
+	seen_tc1 = true;
+	return TC_NEXT;
+}
+
+SEC("tc/egress")
+int tc2(struct __sk_buff *skb)
+{
+	seen_tc2 = true;
+	return TC_NEXT;
+}
+
+SEC("tc/egress")
+int tc3(struct __sk_buff *skb)
+{
+	seen_tc3 = true;
+	return TC_NEXT;
+}
+
+SEC("tc/egress")
+int tc4(struct __sk_buff *skb)
+{
+	seen_tc4 = true;
+	return TC_NEXT;
+}