Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 | // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ #include <test_progs.h> #include "test_global_func1.skel.h" #include "test_global_func2.skel.h" #include "test_global_func3.skel.h" #include "test_global_func4.skel.h" #include "test_global_func5.skel.h" #include "test_global_func6.skel.h" #include "test_global_func7.skel.h" #include "test_global_func8.skel.h" #include "test_global_func9.skel.h" #include "test_global_func10.skel.h" #include "test_global_func11.skel.h" #include "test_global_func12.skel.h" #include "test_global_func13.skel.h" #include "test_global_func14.skel.h" #include "test_global_func15.skel.h" #include "test_global_func16.skel.h" #include "test_global_func17.skel.h" #include "test_global_func_ctx_args.skel.h" #include "bpf/libbpf_internal.h" #include "btf_helpers.h" static void check_ctx_arg_type(const struct btf *btf, const struct btf_param *p) { const struct btf_type *t; const char *s; t = btf__type_by_id(btf, p->type); if (!ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_t")) return; s = btf_type_raw_dump(btf, t->type); if (!ASSERT_HAS_SUBSTR(s, "STRUCT 'bpf_perf_event_data' size=0 vlen=0", "ctx_struct_t")) return; } static void subtest_ctx_arg_rewrite(void) { struct test_global_func_ctx_args *skel = NULL; struct bpf_prog_info info; char func_info_buf[1024] __attribute__((aligned(8))); struct bpf_func_info_min *rec; struct btf *btf = NULL; __u32 info_len = sizeof(info); int err, fd, i; struct btf *kern_btf = NULL; kern_btf = btf__load_vmlinux_btf(); if (!ASSERT_OK_PTR(kern_btf, "kern_btf_load")) return; /* simple detection of kernel native arg:ctx tag support */ if (btf__find_by_name_kind(kern_btf, "bpf_subprog_arg_info", BTF_KIND_STRUCT) > 0) { test__skip(); btf__free(kern_btf); return; } btf__free(kern_btf); skel = test_global_func_ctx_args__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) return; bpf_program__set_autoload(skel->progs.arg_tag_ctx_perf, true); err = test_global_func_ctx_args__load(skel); if (!ASSERT_OK(err, "skel_load")) goto out; memset(&info, 0, sizeof(info)); info.func_info = ptr_to_u64(&func_info_buf); info.nr_func_info = 3; info.func_info_rec_size = sizeof(struct bpf_func_info_min); fd = bpf_program__fd(skel->progs.arg_tag_ctx_perf); err = bpf_prog_get_info_by_fd(fd, &info, &info_len); if (!ASSERT_OK(err, "prog_info")) goto out; if (!ASSERT_EQ(info.nr_func_info, 3, "nr_func_info")) goto out; btf = btf__load_from_kernel_by_id(info.btf_id); if (!ASSERT_OK_PTR(btf, "obj_kern_btf")) goto out; rec = (struct bpf_func_info_min *)func_info_buf; for (i = 0; i < info.nr_func_info; i++, rec = (void *)rec + info.func_info_rec_size) { const struct btf_type *fn_t, *proto_t; const char *name; if (rec->insn_off == 0) continue; /* main prog, skip */ fn_t = btf__type_by_id(btf, rec->type_id); if (!ASSERT_OK_PTR(fn_t, "fn_type")) goto out; if (!ASSERT_EQ(btf_kind(fn_t), BTF_KIND_FUNC, "fn_type_kind")) goto out; proto_t = btf__type_by_id(btf, fn_t->type); if (!ASSERT_OK_PTR(proto_t, "proto_type")) goto out; name = btf__name_by_offset(btf, fn_t->name_off); if (strcmp(name, "subprog_ctx_tag") == 0) { /* int subprog_ctx_tag(void *ctx __arg_ctx) */ if (!ASSERT_EQ(btf_vlen(proto_t), 1, "arg_cnt")) goto out; /* arg 0 is PTR -> STRUCT bpf_perf_event_data */ check_ctx_arg_type(btf, &btf_params(proto_t)[0]); } else if (strcmp(name, "subprog_multi_ctx_tags") == 0) { /* int subprog_multi_ctx_tags(void *ctx1 __arg_ctx, * struct my_struct *mem, * void *ctx2 __arg_ctx) */ if (!ASSERT_EQ(btf_vlen(proto_t), 3, "arg_cnt")) goto out; /* arg 0 is PTR -> STRUCT bpf_perf_event_data */ check_ctx_arg_type(btf, &btf_params(proto_t)[0]); /* arg 2 is PTR -> STRUCT bpf_perf_event_data */ check_ctx_arg_type(btf, &btf_params(proto_t)[2]); } else { ASSERT_FAIL("unexpected subprog %s", name); goto out; } } out: btf__free(btf); test_global_func_ctx_args__destroy(skel); } void test_test_global_funcs(void) { RUN_TESTS(test_global_func1); RUN_TESTS(test_global_func2); RUN_TESTS(test_global_func3); RUN_TESTS(test_global_func4); RUN_TESTS(test_global_func5); RUN_TESTS(test_global_func6); RUN_TESTS(test_global_func7); RUN_TESTS(test_global_func8); RUN_TESTS(test_global_func9); RUN_TESTS(test_global_func10); RUN_TESTS(test_global_func11); RUN_TESTS(test_global_func12); RUN_TESTS(test_global_func13); RUN_TESTS(test_global_func14); RUN_TESTS(test_global_func15); RUN_TESTS(test_global_func16); RUN_TESTS(test_global_func17); RUN_TESTS(test_global_func_ctx_args); if (test__start_subtest("ctx_arg_rewrite")) subtest_ctx_arg_rewrite(); } |