diff options
Diffstat (limited to 'tools/testing/selftests/bpf')
| -rw-r--r-- | tools/testing/selftests/bpf/test_progs.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 3ecf733330c1..0ef68204c84b 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -1542,6 +1542,162 @@ close_prog_noerr: bpf_object__close(obj); } +static void test_task_fd_query_rawtp(void) +{ + const char *file = "./test_get_stack_rawtp.o"; + __u64 probe_offset, probe_addr; + __u32 len, prog_id, fd_type; + struct bpf_object *obj; + int efd, err, prog_fd; + __u32 duration = 0; + char buf[256]; + + err = bpf_prog_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd); + if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno)) + return; + + efd = bpf_raw_tracepoint_open("sys_enter", prog_fd); + if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno)) + goto close_prog; + + /* query (getpid(), efd) */ + len = sizeof(buf); + err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id, + &fd_type, &probe_offset, &probe_addr); + if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err, + errno)) + goto close_prog; + + err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT && + strcmp(buf, "sys_enter") == 0; + if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n", + fd_type, buf)) + goto close_prog; + + /* test zero len */ + len = 0; + err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id, + &fd_type, &probe_offset, &probe_addr); + if (CHECK(err < 0, "bpf_task_fd_query (len = 0)", "err %d errno %d\n", + err, errno)) + goto close_prog; + err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT && + len == strlen("sys_enter"); + if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len)) + goto close_prog; + + /* test empty buffer */ + len = sizeof(buf); + err = bpf_task_fd_query(getpid(), efd, 0, 0, &len, &prog_id, + &fd_type, &probe_offset, &probe_addr); + if (CHECK(err < 0, "bpf_task_fd_query (buf = 0)", "err %d errno %d\n", + err, errno)) + goto close_prog; + err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT && + len == strlen("sys_enter"); + if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len)) + goto close_prog; + + /* test smaller buffer */ + len = 3; + err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id, + &fd_type, &probe_offset, &probe_addr); + if (CHECK(err >= 0 || errno != ENOSPC, "bpf_task_fd_query (len = 3)", + "err %d errno %d\n", err, errno)) + goto close_prog; + err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT && + len == strlen("sys_enter") && + strcmp(buf, "sy") == 0; + if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len)) + goto close_prog; + + goto close_prog_noerr; +close_prog: + error_cnt++; +close_prog_noerr: + bpf_object__close(obj); +} + +static void test_task_fd_query_tp_core(const char *probe_name, + const char *tp_name) +{ + const char *file = "./test_tracepoint.o"; + int err, bytes, efd, prog_fd, pmu_fd; + struct perf_event_attr attr = {}; + __u64 probe_offset, probe_addr; + __u32 len, prog_id, fd_type; + struct bpf_object *obj; + __u32 duration = 0; + char buf[256]; + + err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd); + if (CHECK(err, "bpf_prog_load", "err %d errno %d\n", err, errno)) + goto close_prog; + + snprintf(buf, sizeof(buf), + "/sys/kernel/debug/tracing/events/%s/id", probe_name); + efd = open(buf, O_RDONLY, 0); + if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno)) + goto close_prog; + bytes = read(efd, buf, sizeof(buf)); + close(efd); + if (CHECK(bytes <= 0 || bytes >= sizeof(buf), "read", + "bytes %d errno %d\n", bytes, errno)) + goto close_prog; + + attr.config = strtol(buf, NULL, 0); + attr.type = PERF_TYPE_TRACEPOINT; + attr.sample_type = PERF_SAMPLE_RAW; + attr.sample_period = 1; + attr.wakeup_events = 1; + pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */, + 0 /* cpu 0 */, -1 /* group id */, + 0 /* flags */); + if (CHECK(err, "perf_event_open", "err %d errno %d\n", err, errno)) + goto close_pmu; + + err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0); + if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n", err, + errno)) + goto close_pmu; + + err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd); + if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n", err, + errno)) + goto close_pmu; + + /* query (getpid(), pmu_fd) */ + len = sizeof(buf); + err = bpf_task_fd_query(getpid(), pmu_fd, 0, buf, &len, &prog_id, + &fd_type, &probe_offset, &probe_addr); + if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err, + errno)) + goto close_pmu; + + err = (fd_type == BPF_FD_TYPE_TRACEPOINT) && !strcmp(buf, tp_name); + if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n", + fd_type, buf)) + goto close_pmu; + + close(pmu_fd); + goto close_prog_noerr; + +close_pmu: + close(pmu_fd); +close_prog: + error_cnt++; +close_prog_noerr: + bpf_object__close(obj); +} + +static void test_task_fd_query_tp(void) +{ + test_task_fd_query_tp_core("sched/sched_switch", + "sched_switch"); + test_task_fd_query_tp_core("syscalls/sys_enter_read", + "sys_enter_read"); +} + int main(void) { jit_enabled = is_jit_enabled(); @@ -1561,6 +1717,8 @@ int main(void) test_stacktrace_build_id_nmi(); test_stacktrace_map_raw_tp(); test_get_stack_raw_tp(); + test_task_fd_query_rawtp(); + test_task_fd_query_tp(); printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt); return error_cnt ? EXIT_FAILURE : EXIT_SUCCESS; |