1// SPDX-License-Identifier: GPL-2.0
 2#include <test_progs.h>
 3
 4#define IFINDEX_LO 1
 5#define XDP_FLAGS_REPLACE		(1U << 4)
 6
 7void serial_test_xdp_attach(void)
 8{
 9	__u32 duration = 0, id1, id2, id0 = 0, len;
10	struct bpf_object *obj1, *obj2, *obj3;
11	const char *file = "./test_xdp.bpf.o";
12	struct bpf_prog_info info = {};
13	int err, fd1, fd2, fd3;
14	LIBBPF_OPTS(bpf_xdp_attach_opts, opts);
15
16	len = sizeof(info);
17
18	err = bpf_prog_test_load(file, BPF_PROG_TYPE_XDP, &obj1, &fd1);
19	if (CHECK_FAIL(err))
20		return;
21	err = bpf_obj_get_info_by_fd(fd1, &info, &len);
22	if (CHECK_FAIL(err))
23		goto out_1;
24	id1 = info.id;
25
26	err = bpf_prog_test_load(file, BPF_PROG_TYPE_XDP, &obj2, &fd2);
27	if (CHECK_FAIL(err))
28		goto out_1;
29
30	memset(&info, 0, sizeof(info));
31	err = bpf_obj_get_info_by_fd(fd2, &info, &len);
32	if (CHECK_FAIL(err))
33		goto out_2;
34	id2 = info.id;
35
36	err = bpf_prog_test_load(file, BPF_PROG_TYPE_XDP, &obj3, &fd3);
37	if (CHECK_FAIL(err))
38		goto out_2;
39
40	err = bpf_xdp_attach(IFINDEX_LO, fd1, XDP_FLAGS_REPLACE, &opts);
41	if (CHECK(err, "load_ok", "initial load failed"))
42		goto out_close;
43
44	err = bpf_xdp_query_id(IFINDEX_LO, 0, &id0);
45	if (CHECK(err || id0 != id1, "id1_check",
46		  "loaded prog id %u != id1 %u, err %d", id0, id1, err))
47		goto out_close;
48
49	err = bpf_xdp_attach(IFINDEX_LO, fd2, XDP_FLAGS_REPLACE, &opts);
50	if (CHECK(!err, "load_fail", "load with expected id didn't fail"))
51		goto out;
52
53	opts.old_prog_fd = fd1;
54	err = bpf_xdp_attach(IFINDEX_LO, fd2, 0, &opts);
55	if (CHECK(err, "replace_ok", "replace valid old_fd failed"))
56		goto out;
57	err = bpf_xdp_query_id(IFINDEX_LO, 0, &id0);
58	if (CHECK(err || id0 != id2, "id2_check",
59		  "loaded prog id %u != id2 %u, err %d", id0, id2, err))
60		goto out_close;
61
62	err = bpf_xdp_attach(IFINDEX_LO, fd3, 0, &opts);
63	if (CHECK(!err, "replace_fail", "replace invalid old_fd didn't fail"))
64		goto out;
65
66	err = bpf_xdp_detach(IFINDEX_LO, 0, &opts);
67	if (CHECK(!err, "remove_fail", "remove invalid old_fd didn't fail"))
68		goto out;
69
70	opts.old_prog_fd = fd2;
71	err = bpf_xdp_detach(IFINDEX_LO, 0, &opts);
72	if (CHECK(err, "remove_ok", "remove valid old_fd failed"))
73		goto out;
74
75	err = bpf_xdp_query_id(IFINDEX_LO, 0, &id0);
76	if (CHECK(err || id0 != 0, "unload_check",
77		  "loaded prog id %u != 0, err %d", id0, err))
78		goto out_close;
79out:
80	bpf_xdp_detach(IFINDEX_LO, 0, NULL);
81out_close:
82	bpf_object__close(obj3);
83out_2:
84	bpf_object__close(obj2);
85out_1:
86	bpf_object__close(obj1);
87}