1// SPDX-License-Identifier: GPL-2.0
2#include <uapi/linux/bpf.h>
3#include <linux/if_link.h>
4#include <test_progs.h>
5
6#include "test_xdp_with_cpumap_frags_helpers.skel.h"
7#include "test_xdp_with_cpumap_helpers.skel.h"
8
9#define IFINDEX_LO	1
10
11static void test_xdp_with_cpumap_helpers(void)
12{
13	struct test_xdp_with_cpumap_helpers *skel;
14	struct bpf_prog_info info = {};
15	__u32 len = sizeof(info);
16	struct bpf_cpumap_val val = {
17		.qsize = 192,
18	};
19	int err, prog_fd, map_fd;
20	__u32 idx = 0;
21
22	skel = test_xdp_with_cpumap_helpers__open_and_load();
23	if (!ASSERT_OK_PTR(skel, "test_xdp_with_cpumap_helpers__open_and_load"))
24		return;
25
26	prog_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
27	err = bpf_xdp_attach(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE, NULL);
28	if (!ASSERT_OK(err, "Generic attach of program with 8-byte CPUMAP"))
29		goto out_close;
30
31	err = bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL);
32	ASSERT_OK(err, "XDP program detach");
33
34	prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
35	map_fd = bpf_map__fd(skel->maps.cpu_map);
36	err = bpf_prog_get_info_by_fd(prog_fd, &info, &len);
37	if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd"))
38		goto out_close;
39
40	val.bpf_prog.fd = prog_fd;
41	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
42	ASSERT_OK(err, "Add program to cpumap entry");
43
44	err = bpf_map_lookup_elem(map_fd, &idx, &val);
45	ASSERT_OK(err, "Read cpumap entry");
46	ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to cpumap entry prog_id");
47
48	/* can not attach BPF_XDP_CPUMAP program to a device */
49	err = bpf_xdp_attach(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE, NULL);
50	if (!ASSERT_NEQ(err, 0, "Attach of BPF_XDP_CPUMAP program"))
51		bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL);
52
53	val.qsize = 192;
54	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog);
55	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
56	ASSERT_NEQ(err, 0, "Add non-BPF_XDP_CPUMAP program to cpumap entry");
57
58	/* Try to attach BPF_XDP program with frags to cpumap when we have
59	 * already loaded a BPF_XDP program on the map
60	 */
61	idx = 1;
62	val.qsize = 192;
63	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_cm_frags);
64	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
65	ASSERT_NEQ(err, 0, "Add BPF_XDP program with frags to cpumap entry");
66
67out_close:
68	test_xdp_with_cpumap_helpers__destroy(skel);
69}
70
71static void test_xdp_with_cpumap_frags_helpers(void)
72{
73	struct test_xdp_with_cpumap_frags_helpers *skel;
74	struct bpf_prog_info info = {};
75	__u32 len = sizeof(info);
76	struct bpf_cpumap_val val = {
77		.qsize = 192,
78	};
79	int err, frags_prog_fd, map_fd;
80	__u32 idx = 0;
81
82	skel = test_xdp_with_cpumap_frags_helpers__open_and_load();
83	if (!ASSERT_OK_PTR(skel, "test_xdp_with_cpumap_helpers__open_and_load"))
84		return;
85
86	frags_prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm_frags);
87	map_fd = bpf_map__fd(skel->maps.cpu_map);
88	err = bpf_prog_get_info_by_fd(frags_prog_fd, &info, &len);
89	if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd"))
90		goto out_close;
91
92	val.bpf_prog.fd = frags_prog_fd;
93	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
94	ASSERT_OK(err, "Add program to cpumap entry");
95
96	err = bpf_map_lookup_elem(map_fd, &idx, &val);
97	ASSERT_OK(err, "Read cpumap entry");
98	ASSERT_EQ(info.id, val.bpf_prog.id,
99		  "Match program id to cpumap entry prog_id");
100
101	/* Try to attach BPF_XDP program to cpumap when we have
102	 * already loaded a BPF_XDP program with frags on the map
103	 */
104	idx = 1;
105	val.qsize = 192;
106	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
107	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
108	ASSERT_NEQ(err, 0, "Add BPF_XDP program to cpumap entry");
109
110out_close:
111	test_xdp_with_cpumap_frags_helpers__destroy(skel);
112}
113
114void serial_test_xdp_cpumap_attach(void)
115{
116	if (test__start_subtest("CPUMAP with programs in entries"))
117		test_xdp_with_cpumap_helpers();
118
119	if (test__start_subtest("CPUMAP with frags programs in entries"))
120		test_xdp_with_cpumap_frags_helpers();
121}
122