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 9static char log_buf[1024 * 1024]; 10 11static 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}; 54 55static int match_regex(const char *pattern, const char *string) 56{ 57 int err, rc; 58 regex_t re; 59 60 err = regcomp(&re, pattern, REG_NOSUB); 61 if (err) { 62 char errbuf[512]; 63 64 regerror(err, &re, errbuf, sizeof(errbuf)); 65 PRINT_FAIL("Can't compile regex: %s\n", errbuf); 66 return -1; 67 } 68 rc = regexec(&re, string, 0, NULL, 0); 69 regfree(&re); 70 return rc == 0 ? 1 : 0; 71} 72 73static void test_spin_lock_fail_prog(const char *prog_name, const char *err_msg) 74{ 75 LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf, 76 .kernel_log_size = sizeof(log_buf), 77 .kernel_log_level = 1); 78 struct test_spin_lock_fail *skel; 79 struct bpf_program *prog; 80 int ret; 81 82 skel = test_spin_lock_fail__open_opts(&opts); 83 if (!ASSERT_OK_PTR(skel, "test_spin_lock_fail__open_opts")) 84 return; 85 86 prog = bpf_object__find_program_by_name(skel->obj, prog_name); 87 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 88 goto end; 89 90 bpf_program__set_autoload(prog, true); 91 92 ret = test_spin_lock_fail__load(skel); 93 if (!ASSERT_ERR(ret, "test_spin_lock_fail__load must fail")) 94 goto end; 95 96 /* Skip check if JIT does not support kfuncs */ 97 if (strstr(log_buf, "JIT does not support calling kernel function")) { 98 test__skip(); 99 goto end; 100 } 101 102 ret = match_regex(err_msg, log_buf); 103 if (!ASSERT_GE(ret, 0, "match_regex")) 104 goto end; 105 106 if (!ASSERT_TRUE(ret, "no match for expected error message")) { 107 fprintf(stderr, "Expected: %s\n", err_msg); 108 fprintf(stderr, "Verifier: %s\n", log_buf); 109 } 110 111end: 112 test_spin_lock_fail__destroy(skel); 113} 114 115static void *spin_lock_thread(void *arg) 116{ 117 int err, prog_fd = *(u32 *) arg; 118 LIBBPF_OPTS(bpf_test_run_opts, topts, 119 .data_in = &pkt_v4, 120 .data_size_in = sizeof(pkt_v4), 121 .repeat = 10000, 122 ); 123 124 err = bpf_prog_test_run_opts(prog_fd, &topts); 125 ASSERT_OK(err, "test_run"); 126 ASSERT_OK(topts.retval, "test_run retval"); 127 pthread_exit(arg); 128} 129 130void test_spin_lock_success(void) 131{ 132 struct test_spin_lock *skel; 133 pthread_t thread_id[4]; 134 int prog_fd, i; 135 void *ret; 136 137 skel = test_spin_lock__open_and_load(); 138 if (!ASSERT_OK_PTR(skel, "test_spin_lock__open_and_load")) 139 return; 140 prog_fd = bpf_program__fd(skel->progs.bpf_spin_lock_test); 141 for (i = 0; i < 4; i++) { 142 int err; 143 144 err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd); 145 if (!ASSERT_OK(err, "pthread_create")) 146 goto end; 147 } 148 149 for (i = 0; i < 4; i++) { 150 if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join")) 151 goto end; 152 if (!ASSERT_EQ(ret, &prog_fd, "ret == prog_fd")) 153 goto end; 154 } 155end: 156 test_spin_lock__destroy(skel); 157} 158 159void test_spin_lock(void) 160{ 161 int i; 162 163 test_spin_lock_success(); 164 165 for (i = 0; i < ARRAY_SIZE(spin_lock_fail_tests); i++) { 166 if (!test__start_subtest(spin_lock_fail_tests[i].prog_name)) 167 continue; 168 test_spin_lock_fail_prog(spin_lock_fail_tests[i].prog_name, 169 spin_lock_fail_tests[i].err_msg); 170 } 171} 172