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_helpers.skel.h"
 7
 8#define IFINDEX_LO	1
 9
10void test_xdp_with_cpumap_helpers(void)
11{
12	struct test_xdp_with_cpumap_helpers *skel;
13	struct bpf_prog_info info = {};
14	struct bpf_cpumap_val val = {
15		.qsize = 192,
16	};
17	__u32 duration = 0, idx = 0;
18	__u32 len = sizeof(info);
19	int err, prog_fd, map_fd;
20
21	skel = test_xdp_with_cpumap_helpers__open_and_load();
22	if (CHECK_FAIL(!skel)) {
23		perror("test_xdp_with_cpumap_helpers__open_and_load");
24		return;
25	}
26
27	/* can not attach program with cpumaps that allow programs
28	 * as xdp generic
29	 */
30	prog_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
31	err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE);
32	CHECK(err == 0, "Generic attach of program with 8-byte CPUMAP",
33	      "should have failed\n");
34
35	prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
36	map_fd = bpf_map__fd(skel->maps.cpu_map);
37	err = bpf_obj_get_info_by_fd(prog_fd, &info, &len);
38	if (CHECK_FAIL(err))
39		goto out_close;
40
41	val.bpf_prog.fd = prog_fd;
42	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
43	CHECK(err, "Add program to cpumap entry", "err %d errno %d\n",
44	      err, errno);
45
46	err = bpf_map_lookup_elem(map_fd, &idx, &val);
47	CHECK(err, "Read cpumap entry", "err %d errno %d\n", err, errno);
48	CHECK(info.id != val.bpf_prog.id, "Expected program id in cpumap entry",
49	      "expected %u read %u\n", info.id, val.bpf_prog.id);
50
51	/* can not attach BPF_XDP_CPUMAP program to a device */
52	err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE);
53	CHECK(err == 0, "Attach of BPF_XDP_CPUMAP program",
54	      "should have failed\n");
55
56	val.qsize = 192;
57	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog);
58	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
59	CHECK(err == 0, "Add non-BPF_XDP_CPUMAP program to cpumap entry",
60	      "should have failed\n");
61
62out_close:
63	test_xdp_with_cpumap_helpers__destroy(skel);
64}
65
66void test_xdp_cpumap_attach(void)
67{
68	if (test__start_subtest("cpumap_with_progs"))
69		test_xdp_with_cpumap_helpers();
70}