samples/bpf: raw tracepoint test
add empty raw_tracepoint bpf program to test overhead similar to kprobe and traditional tracepoint tests Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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@ -119,6 +119,7 @@ always += offwaketime_kern.o
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always += spintest_kern.o
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always += map_perf_test_kern.o
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always += test_overhead_tp_kern.o
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always += test_overhead_raw_tp_kern.o
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always += test_overhead_kprobe_kern.o
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always += parse_varlen.o parse_simple.o parse_ldabs.o
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always += test_cgrp2_tc_kern.o
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@ -61,6 +61,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
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bool is_kprobe = strncmp(event, "kprobe/", 7) == 0;
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bool is_kretprobe = strncmp(event, "kretprobe/", 10) == 0;
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bool is_tracepoint = strncmp(event, "tracepoint/", 11) == 0;
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bool is_raw_tracepoint = strncmp(event, "raw_tracepoint/", 15) == 0;
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bool is_xdp = strncmp(event, "xdp", 3) == 0;
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bool is_perf_event = strncmp(event, "perf_event", 10) == 0;
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bool is_cgroup_skb = strncmp(event, "cgroup/skb", 10) == 0;
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@ -85,6 +86,8 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
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prog_type = BPF_PROG_TYPE_KPROBE;
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} else if (is_tracepoint) {
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prog_type = BPF_PROG_TYPE_TRACEPOINT;
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} else if (is_raw_tracepoint) {
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prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT;
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} else if (is_xdp) {
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prog_type = BPF_PROG_TYPE_XDP;
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} else if (is_perf_event) {
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@ -131,6 +134,16 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
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return populate_prog_array(event, fd);
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}
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if (is_raw_tracepoint) {
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efd = bpf_raw_tracepoint_open(event + 15, fd);
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if (efd < 0) {
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printf("tracepoint %s %s\n", event + 15, strerror(errno));
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return -1;
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}
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event_fd[prog_cnt - 1] = efd;
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return 0;
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}
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if (is_kprobe || is_kretprobe) {
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if (is_kprobe)
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event += 7;
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@ -587,6 +600,7 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
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if (memcmp(shname, "kprobe/", 7) == 0 ||
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memcmp(shname, "kretprobe/", 10) == 0 ||
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memcmp(shname, "tracepoint/", 11) == 0 ||
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memcmp(shname, "raw_tracepoint/", 15) == 0 ||
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memcmp(shname, "xdp", 3) == 0 ||
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memcmp(shname, "perf_event", 10) == 0 ||
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memcmp(shname, "socket", 6) == 0 ||
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17
samples/bpf/test_overhead_raw_tp_kern.c
Normal file
17
samples/bpf/test_overhead_raw_tp_kern.c
Normal file
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@ -0,0 +1,17 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018 Facebook */
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#include <uapi/linux/bpf.h>
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#include "bpf_helpers.h"
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SEC("raw_tracepoint/task_rename")
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int prog(struct bpf_raw_tracepoint_args *ctx)
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{
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return 0;
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}
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SEC("raw_tracepoint/urandom_read")
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int prog2(struct bpf_raw_tracepoint_args *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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@ -158,5 +158,17 @@ int main(int argc, char **argv)
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unload_progs();
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}
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if (test_flags & 0xC0) {
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snprintf(filename, sizeof(filename),
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"%s_raw_tp_kern.o", argv[0]);
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if (load_bpf_file(filename)) {
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printf("%s", bpf_log_buf);
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return 1;
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}
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printf("w/RAW_TRACEPOINT\n");
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run_perf_test(num_cpu, test_flags >> 6);
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unload_progs();
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}
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return 0;
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}
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