1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 #include <test_progs.h> 4 5 void test_fentry_test(void) 6 { 7 struct bpf_prog_load_attr attr = { 8 .file = "./fentry_test.o", 9 }; 10 11 char prog_name[] = "fentry/bpf_fentry_testX"; 12 struct bpf_object *obj = NULL, *pkt_obj; 13 int err, pkt_fd, kfree_skb_fd, i; 14 struct bpf_link *link[6] = {}; 15 struct bpf_program *prog[6]; 16 __u32 duration, retval; 17 struct bpf_map *data_map; 18 const int zero = 0; 19 u64 result[6]; 20 21 err = bpf_prog_load("./test_pkt_access.o", BPF_PROG_TYPE_SCHED_CLS, 22 &pkt_obj, &pkt_fd); 23 if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) 24 return; 25 err = bpf_prog_load_xattr(&attr, &obj, &kfree_skb_fd); 26 if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno)) 27 goto close_prog; 28 29 for (i = 0; i < 6; i++) { 30 prog_name[sizeof(prog_name) - 2] = '1' + i; 31 prog[i] = bpf_object__find_program_by_title(obj, prog_name); 32 if (CHECK(!prog[i], "find_prog", "prog %s not found\n", prog_name)) 33 goto close_prog; 34 link[i] = bpf_program__attach_trace(prog[i]); 35 if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n")) 36 goto close_prog; 37 } 38 data_map = bpf_object__find_map_by_name(obj, "fentry_t.bss"); 39 if (CHECK(!data_map, "find_data_map", "data map not found\n")) 40 goto close_prog; 41 42 err = bpf_prog_test_run(pkt_fd, 1, &pkt_v6, sizeof(pkt_v6), 43 NULL, NULL, &retval, &duration); 44 CHECK(err || retval, "ipv6", 45 "err %d errno %d retval %d duration %d\n", 46 err, errno, retval, duration); 47 48 err = bpf_map_lookup_elem(bpf_map__fd(data_map), &zero, &result); 49 if (CHECK(err, "get_result", 50 "failed to get output data: %d\n", err)) 51 goto close_prog; 52 53 for (i = 0; i < 6; i++) 54 if (CHECK(result[i] != 1, "result", "bpf_fentry_test%d failed err %ld\n", 55 i + 1, result[i])) 56 goto close_prog; 57 58 close_prog: 59 for (i = 0; i < 6; i++) 60 if (!IS_ERR_OR_NULL(link[i])) 61 bpf_link__destroy(link[i]); 62 bpf_object__close(obj); 63 bpf_object__close(pkt_obj); 64 } 65