1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (c) 2019 Facebook */ 3 #include <test_progs.h> 4 #include <linux/bpf.h> 5 #include "bpf/libbpf_internal.h" 6 #include "test_raw_tp_test_run.skel.h" 7 8 void test_raw_tp_test_run(void) 9 { 10 int comm_fd = -1, err, nr_online, i, prog_fd; 11 __u64 args[2] = {0x1234ULL, 0x5678ULL}; 12 int expected_retval = 0x1234 + 0x5678; 13 struct test_raw_tp_test_run *skel; 14 char buf[] = "new_name"; 15 bool *online = NULL; 16 LIBBPF_OPTS(bpf_test_run_opts, opts, 17 .ctx_in = args, 18 .ctx_size_in = sizeof(args), 19 .flags = BPF_F_TEST_RUN_ON_CPU, 20 ); 21 22 err = parse_cpu_mask_file("/sys/devices/system/cpu/online", &online, 23 &nr_online); 24 if (!ASSERT_OK(err, "parse_cpu_mask_file")) 25 return; 26 27 skel = test_raw_tp_test_run__open_and_load(); 28 if (!ASSERT_OK_PTR(skel, "skel_open")) 29 goto cleanup; 30 31 err = test_raw_tp_test_run__attach(skel); 32 if (!ASSERT_OK(err, "skel_attach")) 33 goto cleanup; 34 35 comm_fd = open("/proc/self/comm", O_WRONLY|O_TRUNC); 36 if (!ASSERT_GE(comm_fd, 0, "open /proc/self/comm")) 37 goto cleanup; 38 39 err = write(comm_fd, buf, sizeof(buf)); 40 ASSERT_GE(err, 0, "task rename"); 41 42 ASSERT_NEQ(skel->bss->count, 0, "check_count"); 43 ASSERT_EQ(skel->data->on_cpu, 0xffffffff, "check_on_cpu"); 44 45 prog_fd = bpf_program__fd(skel->progs.rename); 46 opts.ctx_in = args; 47 opts.ctx_size_in = sizeof(__u64); 48 49 err = bpf_prog_test_run_opts(prog_fd, &opts); 50 ASSERT_NEQ(err, 0, "test_run should fail for too small ctx"); 51 52 opts.ctx_size_in = sizeof(args); 53 err = bpf_prog_test_run_opts(prog_fd, &opts); 54 ASSERT_OK(err, "test_run"); 55 ASSERT_EQ(opts.retval, expected_retval, "check_retval"); 56 57 for (i = 0; i < nr_online; i++) { 58 if (!online[i]) 59 continue; 60 61 opts.cpu = i; 62 opts.retval = 0; 63 err = bpf_prog_test_run_opts(prog_fd, &opts); 64 ASSERT_OK(err, "test_run_opts"); 65 ASSERT_EQ(skel->data->on_cpu, i, "check_on_cpu"); 66 ASSERT_EQ(opts.retval, expected_retval, "check_retval"); 67 } 68 69 /* invalid cpu ID should fail with ENXIO */ 70 opts.cpu = 0xffffffff; 71 err = bpf_prog_test_run_opts(prog_fd, &opts); 72 ASSERT_EQ(errno, ENXIO, "test_run_opts should fail with ENXIO"); 73 ASSERT_ERR(err, "test_run_opts_fail"); 74 75 /* non-zero cpu w/o BPF_F_TEST_RUN_ON_CPU should fail with EINVAL */ 76 opts.cpu = 1; 77 opts.flags = 0; 78 err = bpf_prog_test_run_opts(prog_fd, &opts); 79 ASSERT_EQ(errno, EINVAL, "test_run_opts should fail with EINVAL"); 80 ASSERT_ERR(err, "test_run_opts_fail"); 81 82 cleanup: 83 close(comm_fd); 84 test_raw_tp_test_run__destroy(skel); 85 free(online); 86 } 87