1 // SPDX-License-Identifier: GPL-2.0 2 #include <regex.h> 3 #include <test_progs.h> 4 #include <network_helpers.h> 5 6 #include "test_spin_lock.skel.h" 7 #include "test_spin_lock_fail.skel.h" 8 9 static char log_buf[1024 * 1024]; 10 11 static struct { 12 const char *prog_name; 13 const char *err_msg; 14 } spin_lock_fail_tests[] = { 15 { "lock_id_kptr_preserve", 16 "5: (bf) r1 = r0 ; R0_w=ptr_foo(id=2,ref_obj_id=2) " 17 "R1_w=ptr_foo(id=2,ref_obj_id=2) refs=2\n6: (85) call bpf_this_cpu_ptr#154\n" 18 "R1 type=ptr_ expected=percpu_ptr_" }, 19 { "lock_id_global_zero", 20 "; R1_w=map_value(map=.data.A,ks=4,vs=4)\n2: (85) call bpf_this_cpu_ptr#154\n" 21 "R1 type=map_value expected=percpu_ptr_" }, 22 { "lock_id_mapval_preserve", 23 "[0-9]\\+: (bf) r1 = r0 ;" 24 " R0_w=map_value(id=1,map=array_map,ks=4,vs=8)" 25 " R1_w=map_value(id=1,map=array_map,ks=4,vs=8)\n" 26 "[0-9]\\+: (85) call bpf_this_cpu_ptr#154\n" 27 "R1 type=map_value expected=percpu_ptr_" }, 28 { "lock_id_innermapval_preserve", 29 "[0-9]\\+: (bf) r1 = r0 ;" 30 " R0=map_value(id=2,ks=4,vs=8)" 31 " R1_w=map_value(id=2,ks=4,vs=8)\n" 32 "[0-9]\\+: (85) call bpf_this_cpu_ptr#154\n" 33 "R1 type=map_value expected=percpu_ptr_" }, 34 { "lock_id_mismatch_kptr_kptr", "bpf_spin_unlock of different lock" }, 35 { "lock_id_mismatch_kptr_global", "bpf_spin_unlock of different lock" }, 36 { "lock_id_mismatch_kptr_mapval", "bpf_spin_unlock of different lock" }, 37 { "lock_id_mismatch_kptr_innermapval", "bpf_spin_unlock of different lock" }, 38 { "lock_id_mismatch_global_global", "bpf_spin_unlock of different lock" }, 39 { "lock_id_mismatch_global_kptr", "bpf_spin_unlock of different lock" }, 40 { "lock_id_mismatch_global_mapval", "bpf_spin_unlock of different lock" }, 41 { "lock_id_mismatch_global_innermapval", "bpf_spin_unlock of different lock" }, 42 { "lock_id_mismatch_mapval_mapval", "bpf_spin_unlock of different lock" }, 43 { "lock_id_mismatch_mapval_kptr", "bpf_spin_unlock of different lock" }, 44 { "lock_id_mismatch_mapval_global", "bpf_spin_unlock of different lock" }, 45 { "lock_id_mismatch_mapval_innermapval", "bpf_spin_unlock of different lock" }, 46 { "lock_id_mismatch_innermapval_innermapval1", "bpf_spin_unlock of different lock" }, 47 { "lock_id_mismatch_innermapval_innermapval2", "bpf_spin_unlock of different lock" }, 48 { "lock_id_mismatch_innermapval_kptr", "bpf_spin_unlock of different lock" }, 49 { "lock_id_mismatch_innermapval_global", "bpf_spin_unlock of different lock" }, 50 { "lock_id_mismatch_innermapval_mapval", "bpf_spin_unlock of different lock" }, 51 { "lock_global_subprog_call1", "global function calls are not allowed while holding a lock" }, 52 { "lock_global_subprog_call2", "global function calls are not allowed while holding a lock" }, 53 { "lock_global_sleepable_helper_subprog", "global function calls are not allowed while holding a lock" }, 54 { "lock_global_sleepable_kfunc_subprog", "global function calls are not allowed while holding a lock" }, 55 { "lock_global_sleepable_subprog_indirect", "global function calls are not allowed while holding a lock" }, 56 }; 57 58 static int match_regex(const char *pattern, const char *string) 59 { 60 int err, rc; 61 regex_t re; 62 63 err = regcomp(&re, pattern, REG_NOSUB); 64 if (err) { 65 char errbuf[512]; 66 67 regerror(err, &re, errbuf, sizeof(errbuf)); 68 PRINT_FAIL("Can't compile regex: %s\n", errbuf); 69 return -1; 70 } 71 rc = regexec(&re, string, 0, NULL, 0); 72 regfree(&re); 73 return rc == 0 ? 1 : 0; 74 } 75 76 static void test_spin_lock_fail_prog(const char *prog_name, const char *err_msg) 77 { 78 LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf, 79 .kernel_log_size = sizeof(log_buf), 80 .kernel_log_level = 1); 81 struct test_spin_lock_fail *skel; 82 struct bpf_program *prog; 83 int ret; 84 85 skel = test_spin_lock_fail__open_opts(&opts); 86 if (!ASSERT_OK_PTR(skel, "test_spin_lock_fail__open_opts")) 87 return; 88 89 prog = bpf_object__find_program_by_name(skel->obj, prog_name); 90 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 91 goto end; 92 93 bpf_program__set_autoload(prog, true); 94 95 ret = test_spin_lock_fail__load(skel); 96 if (!ASSERT_ERR(ret, "test_spin_lock_fail__load must fail")) 97 goto end; 98 99 /* Skip check if JIT does not support kfuncs */ 100 if (strstr(log_buf, "JIT does not support calling kernel function")) { 101 test__skip(); 102 goto end; 103 } 104 105 ret = match_regex(err_msg, log_buf); 106 if (!ASSERT_GE(ret, 0, "match_regex")) 107 goto end; 108 109 if (!ASSERT_TRUE(ret, "no match for expected error message")) { 110 fprintf(stderr, "Expected: %s\n", err_msg); 111 fprintf(stderr, "Verifier: %s\n", log_buf); 112 } 113 114 end: 115 test_spin_lock_fail__destroy(skel); 116 } 117 118 static void *spin_lock_thread(void *arg) 119 { 120 int err, prog_fd = *(u32 *) arg; 121 LIBBPF_OPTS(bpf_test_run_opts, topts, 122 .data_in = &pkt_v4, 123 .data_size_in = sizeof(pkt_v4), 124 .repeat = 10000, 125 ); 126 127 err = bpf_prog_test_run_opts(prog_fd, &topts); 128 ASSERT_OK(err, "test_run"); 129 ASSERT_OK(topts.retval, "test_run retval"); 130 pthread_exit(arg); 131 } 132 133 void test_spin_lock_success(void) 134 { 135 struct test_spin_lock *skel; 136 pthread_t thread_id[4]; 137 int prog_fd, i; 138 void *ret; 139 140 skel = test_spin_lock__open_and_load(); 141 if (!ASSERT_OK_PTR(skel, "test_spin_lock__open_and_load")) 142 return; 143 prog_fd = bpf_program__fd(skel->progs.bpf_spin_lock_test); 144 for (i = 0; i < 4; i++) { 145 int err; 146 147 err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd); 148 if (!ASSERT_OK(err, "pthread_create")) 149 goto end; 150 } 151 152 for (i = 0; i < 4; i++) { 153 if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join")) 154 goto end; 155 if (!ASSERT_EQ(ret, &prog_fd, "ret == prog_fd")) 156 goto end; 157 } 158 end: 159 test_spin_lock__destroy(skel); 160 } 161 162 void test_spin_lock(void) 163 { 164 int i; 165 166 test_spin_lock_success(); 167 168 for (i = 0; i < ARRAY_SIZE(spin_lock_fail_tests); i++) { 169 if (!test__start_subtest(spin_lock_fail_tests[i].prog_name)) 170 continue; 171 test_spin_lock_fail_prog(spin_lock_fail_tests[i].prog_name, 172 spin_lock_fail_tests[i].err_msg); 173 } 174 } 175