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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | // SPDX-License-Identifier: GPL-2.0 #include <regex.h> #include <test_progs.h> #include <network_helpers.h> #include "test_spin_lock.skel.h" #include "test_spin_lock_fail.skel.h" static char log_buf[1024 * 1024]; static struct { const char *prog_name; const char *err_msg; } spin_lock_fail_tests[] = { { "lock_id_kptr_preserve", "5: (bf) r1 = r0 ; R0_w=ptr_foo(id=2,ref_obj_id=2) " "R1_w=ptr_foo(id=2,ref_obj_id=2) refs=2\n6: (85) call bpf_this_cpu_ptr#154\n" "R1 type=ptr_ expected=percpu_ptr_" }, { "lock_id_global_zero", "; R1_w=map_value(map=.data.A,ks=4,vs=4)\n2: (85) call bpf_this_cpu_ptr#154\n" "R1 type=map_value expected=percpu_ptr_" }, { "lock_id_mapval_preserve", "[0-9]\\+: (bf) r1 = r0 ;" " R0_w=map_value(id=1,map=array_map,ks=4,vs=8)" " R1_w=map_value(id=1,map=array_map,ks=4,vs=8)\n" "[0-9]\\+: (85) call bpf_this_cpu_ptr#154\n" "R1 type=map_value expected=percpu_ptr_" }, { "lock_id_innermapval_preserve", "[0-9]\\+: (bf) r1 = r0 ;" " R0=map_value(id=2,ks=4,vs=8)" " R1_w=map_value(id=2,ks=4,vs=8)\n" "[0-9]\\+: (85) call bpf_this_cpu_ptr#154\n" "R1 type=map_value expected=percpu_ptr_" }, { "lock_id_mismatch_kptr_kptr", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_kptr_global", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_kptr_mapval", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_kptr_innermapval", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_global_global", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_global_kptr", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_global_mapval", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_global_innermapval", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_mapval_mapval", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_mapval_kptr", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_mapval_global", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_mapval_innermapval", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_innermapval_innermapval1", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_innermapval_innermapval2", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_innermapval_kptr", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_innermapval_global", "bpf_spin_unlock of different lock" }, { "lock_id_mismatch_innermapval_mapval", "bpf_spin_unlock of different lock" }, { "lock_global_subprog_call1", "global function calls are not allowed while holding a lock" }, { "lock_global_subprog_call2", "global function calls are not allowed while holding a lock" }, }; static int match_regex(const char *pattern, const char *string) { int err, rc; regex_t re; err = regcomp(&re, pattern, REG_NOSUB); if (err) { char errbuf[512]; regerror(err, &re, errbuf, sizeof(errbuf)); PRINT_FAIL("Can't compile regex: %s\n", errbuf); return -1; } rc = regexec(&re, string, 0, NULL, 0); regfree(&re); return rc == 0 ? 1 : 0; } static void test_spin_lock_fail_prog(const char *prog_name, const char *err_msg) { LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf, .kernel_log_size = sizeof(log_buf), .kernel_log_level = 1); struct test_spin_lock_fail *skel; struct bpf_program *prog; int ret; skel = test_spin_lock_fail__open_opts(&opts); if (!ASSERT_OK_PTR(skel, "test_spin_lock_fail__open_opts")) return; prog = bpf_object__find_program_by_name(skel->obj, prog_name); if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) goto end; bpf_program__set_autoload(prog, true); ret = test_spin_lock_fail__load(skel); if (!ASSERT_ERR(ret, "test_spin_lock_fail__load must fail")) goto end; /* Skip check if JIT does not support kfuncs */ if (strstr(log_buf, "JIT does not support calling kernel function")) { test__skip(); goto end; } ret = match_regex(err_msg, log_buf); if (!ASSERT_GE(ret, 0, "match_regex")) goto end; if (!ASSERT_TRUE(ret, "no match for expected error message")) { fprintf(stderr, "Expected: %s\n", err_msg); fprintf(stderr, "Verifier: %s\n", log_buf); } end: test_spin_lock_fail__destroy(skel); } static void *spin_lock_thread(void *arg) { int err, prog_fd = *(u32 *) arg; LIBBPF_OPTS(bpf_test_run_opts, topts, .data_in = &pkt_v4, .data_size_in = sizeof(pkt_v4), .repeat = 10000, ); err = bpf_prog_test_run_opts(prog_fd, &topts); ASSERT_OK(err, "test_run"); ASSERT_OK(topts.retval, "test_run retval"); pthread_exit(arg); } void test_spin_lock_success(void) { struct test_spin_lock *skel; pthread_t thread_id[4]; int prog_fd, i; void *ret; skel = test_spin_lock__open_and_load(); if (!ASSERT_OK_PTR(skel, "test_spin_lock__open_and_load")) return; prog_fd = bpf_program__fd(skel->progs.bpf_spin_lock_test); for (i = 0; i < 4; i++) { int err; err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd); if (!ASSERT_OK(err, "pthread_create")) goto end; } for (i = 0; i < 4; i++) { if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join")) goto end; if (!ASSERT_EQ(ret, &prog_fd, "ret == prog_fd")) goto end; } end: test_spin_lock__destroy(skel); } void test_spin_lock(void) { int i; test_spin_lock_success(); for (i = 0; i < ARRAY_SIZE(spin_lock_fail_tests); i++) { if (!test__start_subtest(spin_lock_fail_tests[i].prog_name)) continue; test_spin_lock_fail_prog(spin_lock_fail_tests[i].prog_name, spin_lock_fail_tests[i].err_msg); } } |