76 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <test_progs.h>3 4void test_task_fd_query_rawtp(void)5{6 const char *file = "./test_get_stack_rawtp.bpf.o";7 __u64 probe_offset, probe_addr;8 __u32 len, prog_id, fd_type;9 struct bpf_object *obj;10 int efd, err, prog_fd;11 __u32 duration = 0;12 char buf[256];13 14 err = bpf_prog_test_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);15 if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))16 return;17 18 efd = bpf_raw_tracepoint_open("sys_enter", prog_fd);19 if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))20 goto close_prog;21 22 /* query (getpid(), efd) */23 len = sizeof(buf);24 err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,25 &fd_type, &probe_offset, &probe_addr);26 if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err,27 errno))28 goto close_prog;29 30 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&31 strcmp(buf, "sys_enter") == 0;32 if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n",33 fd_type, buf))34 goto close_prog;35 36 /* test zero len */37 len = 0;38 err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,39 &fd_type, &probe_offset, &probe_addr);40 if (CHECK(err < 0, "bpf_task_fd_query (len = 0)", "err %d errno %d\n",41 err, errno))42 goto close_prog;43 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&44 len == strlen("sys_enter");45 if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))46 goto close_prog;47 48 /* test empty buffer */49 len = sizeof(buf);50 err = bpf_task_fd_query(getpid(), efd, 0, 0, &len, &prog_id,51 &fd_type, &probe_offset, &probe_addr);52 if (CHECK(err < 0, "bpf_task_fd_query (buf = 0)", "err %d errno %d\n",53 err, errno))54 goto close_prog;55 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&56 len == strlen("sys_enter");57 if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))58 goto close_prog;59 60 /* test smaller buffer */61 len = 3;62 err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,63 &fd_type, &probe_offset, &probe_addr);64 if (CHECK(err >= 0 || errno != ENOSPC, "bpf_task_fd_query (len = 3)",65 "err %d errno %d\n", err, errno))66 goto close_prog;67 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&68 len == strlen("sys_enter") &&69 strcmp(buf, "sy") == 0;70 if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))71 goto close_prog;72 73close_prog:74 bpf_object__close(obj);75}76