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 static int duration; 9 10 void test_raw_tp_test_run(void) 11 { 12 struct bpf_prog_test_run_attr test_attr = {}; 13 int comm_fd = -1, err, nr_online, i, prog_fd; 14 __u64 args[2] = {0x1234ULL, 0x5678ULL}; 15 int expected_retval = 0x1234 + 0x5678; 16 struct test_raw_tp_test_run *skel; 17 char buf[] = "new_name"; 18 bool *online = NULL; 19 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts, 20 .ctx_in = args, 21 .ctx_size_in = sizeof(args), 22 .flags = BPF_F_TEST_RUN_ON_CPU, 23 ); 24 25 err = parse_cpu_mask_file("/sys/devices/system/cpu/online", &online, 26 &nr_online); 27 if (CHECK(err, "parse_cpu_mask_file", "err %d\n", err)) 28 return; 29 30 skel = test_raw_tp_test_run__open_and_load(); 31 if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) 32 goto cleanup; 33 34 err = test_raw_tp_test_run__attach(skel); 35 if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) 36 goto cleanup; 37 38 comm_fd = open("/proc/self/comm", O_WRONLY|O_TRUNC); 39 if (CHECK(comm_fd < 0, "open /proc/self/comm", "err %d\n", errno)) 40 goto cleanup; 41 42 err = write(comm_fd, buf, sizeof(buf)); 43 CHECK(err < 0, "task rename", "err %d", errno); 44 45 CHECK(skel->bss->count == 0, "check_count", "didn't increase\n"); 46 CHECK(skel->data->on_cpu != 0xffffffff, "check_on_cpu", "got wrong value\n"); 47 48 prog_fd = bpf_program__fd(skel->progs.rename); 49 test_attr.prog_fd = prog_fd; 50 test_attr.ctx_in = args; 51 test_attr.ctx_size_in = sizeof(__u64); 52 53 err = bpf_prog_test_run_xattr(&test_attr); 54 CHECK(err == 0, "test_run", "should fail for too small ctx\n"); 55 56 test_attr.ctx_size_in = sizeof(args); 57 err = bpf_prog_test_run_xattr(&test_attr); 58 CHECK(err < 0, "test_run", "err %d\n", errno); 59 CHECK(test_attr.retval != expected_retval, "check_retval", 60 "expect 0x%x, got 0x%x\n", expected_retval, test_attr.retval); 61 62 for (i = 0; i < nr_online; i++) { 63 if (!online[i]) 64 continue; 65 66 opts.cpu = i; 67 opts.retval = 0; 68 err = bpf_prog_test_run_opts(prog_fd, &opts); 69 CHECK(err < 0, "test_run_opts", "err %d\n", errno); 70 CHECK(skel->data->on_cpu != i, "check_on_cpu", 71 "expect %d got %d\n", i, skel->data->on_cpu); 72 CHECK(opts.retval != expected_retval, 73 "check_retval", "expect 0x%x, got 0x%x\n", 74 expected_retval, opts.retval); 75 } 76 77 /* invalid cpu ID should fail with ENXIO */ 78 opts.cpu = 0xffffffff; 79 err = bpf_prog_test_run_opts(prog_fd, &opts); 80 CHECK(err >= 0 || errno != ENXIO, 81 "test_run_opts_fail", 82 "should failed with ENXIO\n"); 83 84 /* non-zero cpu w/o BPF_F_TEST_RUN_ON_CPU should fail with EINVAL */ 85 opts.cpu = 1; 86 opts.flags = 0; 87 err = bpf_prog_test_run_opts(prog_fd, &opts); 88 CHECK(err >= 0 || errno != EINVAL, 89 "test_run_opts_fail", 90 "should failed with EINVAL\n"); 91 92 cleanup: 93 close(comm_fd); 94 test_raw_tp_test_run__destroy(skel); 95 free(online); 96 } 97