90 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <test_progs.h>3 4struct bss {5 unsigned did_run;6 unsigned iters;7 unsigned sum;8};9 10struct rdonly_map_subtest {11 const char *subtest_name;12 const char *prog_name;13 unsigned exp_iters;14 unsigned exp_sum;15};16 17void test_rdonly_maps(void)18{19 const char *file = "test_rdonly_maps.bpf.o";20 struct rdonly_map_subtest subtests[] = {21 { "skip loop", "skip_loop", 0, 0 },22 { "part loop", "part_loop", 3, 2 + 3 + 4 },23 { "full loop", "full_loop", 4, 2 + 3 + 4 + 5 },24 };25 int i, err, zero = 0, duration = 0;26 struct bpf_link *link = NULL;27 struct bpf_program *prog;28 struct bpf_map *bss_map;29 struct bpf_object *obj;30 struct bss bss;31 32 obj = bpf_object__open_file(file, NULL);33 if (!ASSERT_OK_PTR(obj, "obj_open"))34 return;35 36 err = bpf_object__load(obj);37 if (CHECK(err, "obj_load", "err %d errno %d\n", err, errno))38 goto cleanup;39 40 bss_map = bpf_object__find_map_by_name(obj, ".bss");41 if (CHECK(!bss_map, "find_bss_map", "failed\n"))42 goto cleanup;43 44 for (i = 0; i < ARRAY_SIZE(subtests); i++) {45 const struct rdonly_map_subtest *t = &subtests[i];46 47 if (!test__start_subtest(t->subtest_name))48 continue;49 50 prog = bpf_object__find_program_by_name(obj, t->prog_name);51 if (CHECK(!prog, "find_prog", "prog '%s' not found\n",52 t->prog_name))53 goto cleanup;54 55 memset(&bss, 0, sizeof(bss));56 err = bpf_map_update_elem(bpf_map__fd(bss_map), &zero, &bss, 0);57 if (CHECK(err, "set_bss", "failed to set bss data: %d\n", err))58 goto cleanup;59 60 link = bpf_program__attach_raw_tracepoint(prog, "sys_enter");61 if (!ASSERT_OK_PTR(link, "attach_prog"))62 goto cleanup;63 64 /* trigger probe */65 usleep(1);66 67 bpf_link__destroy(link);68 link = NULL;69 70 err = bpf_map_lookup_elem(bpf_map__fd(bss_map), &zero, &bss);71 if (CHECK(err, "get_bss", "failed to get bss data: %d\n", err))72 goto cleanup;73 if (CHECK(bss.did_run == 0, "check_run",74 "prog '%s' didn't run?\n", t->prog_name))75 goto cleanup;76 if (CHECK(bss.iters != t->exp_iters, "check_iters",77 "prog '%s' iters: %d, expected: %d\n",78 t->prog_name, bss.iters, t->exp_iters))79 goto cleanup;80 if (CHECK(bss.sum != t->exp_sum, "check_sum",81 "prog '%s' sum: %d, expected: %d\n",82 t->prog_name, bss.sum, t->exp_sum))83 goto cleanup;84 }85 86cleanup:87 bpf_link__destroy(link);88 bpf_object__close(obj);89}90