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,off=0,imm=0) " 17 "R1_w=ptr_foo(id=2,ref_obj_id=2,off=0,imm=0) 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(off=0,ks=4,vs=4,imm=0)\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,off=0,ks=4,vs=8,imm=0)" 25 " R1_w=map_value(id=1,off=0,ks=4,vs=8,imm=0)\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,off=0,ks=4,vs=8,imm=0)" 31 " R1_w=map_value(id=2,off=0,ks=4,vs=8,imm=0)\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 }; 52 53 static int match_regex(const char *pattern, const char *string) 54 { 55 int err, rc; 56 regex_t re; 57 58 err = regcomp(&re, pattern, REG_NOSUB); 59 if (err) { 60 char errbuf[512]; 61 62 regerror(err, &re, errbuf, sizeof(errbuf)); 63 PRINT_FAIL("Can't compile regex: %s\n", errbuf); 64 return -1; 65 } 66 rc = regexec(&re, string, 0, NULL, 0); 67 regfree(&re); 68 return rc == 0 ? 1 : 0; 69 } 70 71 static void test_spin_lock_fail_prog(const char *prog_name, const char *err_msg) 72 { 73 LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf, 74 .kernel_log_size = sizeof(log_buf), 75 .kernel_log_level = 1); 76 struct test_spin_lock_fail *skel; 77 struct bpf_program *prog; 78 int ret; 79 80 skel = test_spin_lock_fail__open_opts(&opts); 81 if (!ASSERT_OK_PTR(skel, "test_spin_lock_fail__open_opts")) 82 return; 83 84 prog = bpf_object__find_program_by_name(skel->obj, prog_name); 85 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 86 goto end; 87 88 bpf_program__set_autoload(prog, true); 89 90 ret = test_spin_lock_fail__load(skel); 91 if (!ASSERT_ERR(ret, "test_spin_lock_fail__load must fail")) 92 goto end; 93 94 /* Skip check if JIT does not support kfuncs */ 95 if (strstr(log_buf, "JIT does not support calling kernel function")) { 96 test__skip(); 97 goto end; 98 } 99 100 ret = match_regex(err_msg, log_buf); 101 if (!ASSERT_GE(ret, 0, "match_regex")) 102 goto end; 103 104 if (!ASSERT_TRUE(ret, "no match for expected error message")) { 105 fprintf(stderr, "Expected: %s\n", err_msg); 106 fprintf(stderr, "Verifier: %s\n", log_buf); 107 } 108 109 end: 110 test_spin_lock_fail__destroy(skel); 111 } 112 113 static void *spin_lock_thread(void *arg) 114 { 115 int err, prog_fd = *(u32 *) arg; 116 LIBBPF_OPTS(bpf_test_run_opts, topts, 117 .data_in = &pkt_v4, 118 .data_size_in = sizeof(pkt_v4), 119 .repeat = 10000, 120 ); 121 122 err = bpf_prog_test_run_opts(prog_fd, &topts); 123 ASSERT_OK(err, "test_run"); 124 ASSERT_OK(topts.retval, "test_run retval"); 125 pthread_exit(arg); 126 } 127 128 void test_spin_lock_success(void) 129 { 130 struct test_spin_lock *skel; 131 pthread_t thread_id[4]; 132 int prog_fd, i; 133 void *ret; 134 135 skel = test_spin_lock__open_and_load(); 136 if (!ASSERT_OK_PTR(skel, "test_spin_lock__open_and_load")) 137 return; 138 prog_fd = bpf_program__fd(skel->progs.bpf_spin_lock_test); 139 for (i = 0; i < 4; i++) { 140 int err; 141 142 err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd); 143 if (!ASSERT_OK(err, "pthread_create")) 144 goto end; 145 } 146 147 for (i = 0; i < 4; i++) { 148 if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join")) 149 goto end; 150 if (!ASSERT_EQ(ret, &prog_fd, "ret == prog_fd")) 151 goto end; 152 } 153 end: 154 test_spin_lock__destroy(skel); 155 } 156 157 void test_spin_lock(void) 158 { 159 int i; 160 161 test_spin_lock_success(); 162 163 for (i = 0; i < ARRAY_SIZE(spin_lock_fail_tests); i++) { 164 if (!test__start_subtest(spin_lock_fail_tests[i].prog_name)) 165 continue; 166 test_spin_lock_fail_prog(spin_lock_fail_tests[i].prog_name, 167 spin_lock_fail_tests[i].err_msg); 168 } 169 } 170