1
2
3#include <test_progs.h>
4
5static void test_fexit_bpf2bpf_common(const char *obj_file,
6 const char *target_obj_file,
7 int prog_cnt,
8 const char **prog_name)
9{
10 struct bpf_object *obj = NULL, *pkt_obj;
11 int err, pkt_fd, i;
12 struct bpf_link **link = NULL;
13 struct bpf_program **prog = NULL;
14 __u32 duration = 0, retval;
15 struct bpf_map *data_map;
16 const int zero = 0;
17 u64 *result = NULL;
18
19 err = bpf_prog_load(target_obj_file, BPF_PROG_TYPE_UNSPEC,
20 &pkt_obj, &pkt_fd);
21 if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno))
22 return;
23 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
24 .attach_prog_fd = pkt_fd,
25 );
26
27 link = calloc(sizeof(struct bpf_link *), prog_cnt);
28 prog = calloc(sizeof(struct bpf_program *), prog_cnt);
29 result = malloc((prog_cnt + 32 ) * sizeof(u64));
30 if (CHECK(!link || !prog || !result, "alloc_memory",
31 "failed to alloc memory"))
32 goto close_prog;
33
34 obj = bpf_object__open_file(obj_file, &opts);
35 if (CHECK(IS_ERR_OR_NULL(obj), "obj_open",
36 "failed to open fexit_bpf2bpf: %ld\n",
37 PTR_ERR(obj)))
38 goto close_prog;
39
40 err = bpf_object__load(obj);
41 if (CHECK(err, "obj_load", "err %d\n", err))
42 goto close_prog;
43
44 for (i = 0; i < prog_cnt; i++) {
45 prog[i] = bpf_object__find_program_by_title(obj, prog_name[i]);
46 if (CHECK(!prog[i], "find_prog", "prog %s not found\n", prog_name[i]))
47 goto close_prog;
48 link[i] = bpf_program__attach_trace(prog[i]);
49 if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n"))
50 goto close_prog;
51 }
52 data_map = bpf_object__find_map_by_name(obj, "fexit_bp.bss");
53 if (CHECK(!data_map, "find_data_map", "data map not found\n"))
54 goto close_prog;
55
56 err = bpf_prog_test_run(pkt_fd, 1, &pkt_v6, sizeof(pkt_v6),
57 NULL, NULL, &retval, &duration);
58 CHECK(err || retval, "ipv6",
59 "err %d errno %d retval %d duration %d\n",
60 err, errno, retval, duration);
61
62 err = bpf_map_lookup_elem(bpf_map__fd(data_map), &zero, result);
63 if (CHECK(err, "get_result",
64 "failed to get output data: %d\n", err))
65 goto close_prog;
66
67 for (i = 0; i < prog_cnt; i++)
68 if (CHECK(result[i] != 1, "result", "fexit_bpf2bpf failed err %ld\n",
69 result[i]))
70 goto close_prog;
71
72close_prog:
73 for (i = 0; i < prog_cnt; i++)
74 if (!IS_ERR_OR_NULL(link[i]))
75 bpf_link__destroy(link[i]);
76 if (!IS_ERR_OR_NULL(obj))
77 bpf_object__close(obj);
78 bpf_object__close(pkt_obj);
79 free(link);
80 free(prog);
81 free(result);
82}
83
84static void test_target_no_callees(void)
85{
86 const char *prog_name[] = {
87 "fexit/test_pkt_md_access",
88 };
89 test_fexit_bpf2bpf_common("./fexit_bpf2bpf_simple.o",
90 "./test_pkt_md_access.o",
91 ARRAY_SIZE(prog_name),
92 prog_name);
93}
94
95static void test_target_yes_callees(void)
96{
97 const char *prog_name[] = {
98 "fexit/test_pkt_access",
99 "fexit/test_pkt_access_subprog1",
100 "fexit/test_pkt_access_subprog2",
101 "fexit/test_pkt_access_subprog3",
102 };
103 test_fexit_bpf2bpf_common("./fexit_bpf2bpf.o",
104 "./test_pkt_access.o",
105 ARRAY_SIZE(prog_name),
106 prog_name);
107}
108
109static void test_func_replace(void)
110{
111 const char *prog_name[] = {
112 "fexit/test_pkt_access",
113 "fexit/test_pkt_access_subprog1",
114 "fexit/test_pkt_access_subprog2",
115 "fexit/test_pkt_access_subprog3",
116 "freplace/get_skb_len",
117 "freplace/get_skb_ifindex",
118 "freplace/get_constant",
119 };
120 test_fexit_bpf2bpf_common("./fexit_bpf2bpf.o",
121 "./test_pkt_access.o",
122 ARRAY_SIZE(prog_name),
123 prog_name);
124}
125
126void test_fexit_bpf2bpf(void)
127{
128 test_target_no_callees();
129 test_target_yes_callees();
130 test_func_replace();
131}
132
