1
2#include <uapi/linux/bpf.h>
3#include <linux/if_link.h>
4#include <test_progs.h>
5
6#include "test_xdp_devmap_helpers.skel.h"
7#include "test_xdp_with_devmap_helpers.skel.h"
8
9#define IFINDEX_LO 1
10
11void test_xdp_with_devmap_helpers(void)
12{
13 struct test_xdp_with_devmap_helpers *skel;
14 struct bpf_prog_info info = {};
15 struct bpf_devmap_val val = {
16 .ifindex = IFINDEX_LO,
17 };
18 __u32 len = sizeof(info);
19 int err, dm_fd, map_fd;
20 __u32 idx = 0;
21
22
23 skel = test_xdp_with_devmap_helpers__open_and_load();
24 if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load"))
25 return;
26
27 dm_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
28 err = bpf_set_link_xdp_fd(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE);
29 if (!ASSERT_OK(err, "Generic attach of program with 8-byte devmap"))
30 goto out_close;
31
32 err = bpf_set_link_xdp_fd(IFINDEX_LO, -1, XDP_FLAGS_SKB_MODE);
33 ASSERT_OK(err, "XDP program detach");
34
35 dm_fd = bpf_program__fd(skel->progs.xdp_dummy_dm);
36 map_fd = bpf_map__fd(skel->maps.dm_ports);
37 err = bpf_obj_get_info_by_fd(dm_fd, &info, &len);
38 if (!ASSERT_OK(err, "bpf_obj_get_info_by_fd"))
39 goto out_close;
40
41 val.bpf_prog.fd = dm_fd;
42 err = bpf_map_update_elem(map_fd, &idx, &val, 0);
43 ASSERT_OK(err, "Add program to devmap entry");
44
45 err = bpf_map_lookup_elem(map_fd, &idx, &val);
46 ASSERT_OK(err, "Read devmap entry");
47 ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to devmap entry prog_id");
48
49
50 err = bpf_set_link_xdp_fd(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE);
51 if (!ASSERT_NEQ(err, 0, "Attach of BPF_XDP_DEVMAP program"))
52 bpf_set_link_xdp_fd(IFINDEX_LO, -1, XDP_FLAGS_SKB_MODE);
53
54 val.ifindex = 1;
55 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog);
56 err = bpf_map_update_elem(map_fd, &idx, &val, 0);
57 ASSERT_NEQ(err, 0, "Add non-BPF_XDP_DEVMAP program to devmap entry");
58
59out_close:
60 test_xdp_with_devmap_helpers__destroy(skel);
61}
62
63void test_neg_xdp_devmap_helpers(void)
64{
65 struct test_xdp_devmap_helpers *skel;
66
67 skel = test_xdp_devmap_helpers__open_and_load();
68 if (!ASSERT_EQ(skel, NULL,
69 "Load of XDP program accessing egress ifindex without attach type")) {
70 test_xdp_devmap_helpers__destroy(skel);
71 }
72}
73
74
75void test_xdp_devmap_attach(void)
76{
77 if (test__start_subtest("DEVMAP with programs in entries"))
78 test_xdp_with_devmap_helpers();
79
80 if (test__start_subtest("Verifier check of DEVMAP programs"))
81 test_neg_xdp_devmap_helpers();
82}
83
