samples/bpf: raw tracepoint test (4662a4e5) · Commits · 戴 / test

samples/bpf/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -119,6 +119,7 @@ always += offwaketime_kern.o
		always += spintest_kern.o
		always += map_perf_test_kern.o
		always += test_overhead_tp_kern.o
		always += test_overhead_raw_tp_kern.o
		always += test_overhead_kprobe_kern.o
		always += parse_varlen.o parse_simple.o parse_ldabs.o
		always += test_cgrp2_tc_kern.o

samples/bpf/bpf_load.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -61,6 +61,7 @@ static int load_and_attach(const char event, struct bpf_insn prog, int size)
		bool is_kprobe = strncmp(event, "kprobe/", 7) == 0;
		bool is_kretprobe = strncmp(event, "kretprobe/", 10) == 0;
		bool is_tracepoint = strncmp(event, "tracepoint/", 11) == 0;
		bool is_raw_tracepoint = strncmp(event, "raw_tracepoint/", 15) == 0;
		bool is_xdp = strncmp(event, "xdp", 3) == 0;
		bool is_perf_event = strncmp(event, "perf_event", 10) == 0;
		bool is_cgroup_skb = strncmp(event, "cgroup/skb", 10) == 0;
		@@ -85,6 +86,8 @@ static int load_and_attach(const char event, struct bpf_insn prog, int size)
		prog_type = BPF_PROG_TYPE_KPROBE;
		} else if (is_tracepoint) {
		prog_type = BPF_PROG_TYPE_TRACEPOINT;
		} else if (is_raw_tracepoint) {
		prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT;
		} else if (is_xdp) {
		prog_type = BPF_PROG_TYPE_XDP;
		} else if (is_perf_event) {
		@@ -131,6 +134,16 @@ static int load_and_attach(const char event, struct bpf_insn prog, int size)
		return populate_prog_array(event, fd);
		}

		if (is_raw_tracepoint) {
		efd = bpf_raw_tracepoint_open(event + 15, fd);
		if (efd < 0) {
		printf("tracepoint %s %s\n", event + 15, strerror(errno));
		return -1;
		}
		event_fd[prog_cnt - 1] = efd;
		return 0;
		}

		if (is_kprobe \|\| is_kretprobe) {
		if (is_kprobe)
		event += 7;
		@@ -587,6 +600,7 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
		if (memcmp(shname, "kprobe/", 7) == 0 \|\|
		memcmp(shname, "kretprobe/", 10) == 0 \|\|
		memcmp(shname, "tracepoint/", 11) == 0 \|\|
		memcmp(shname, "raw_tracepoint/", 15) == 0 \|\|
		memcmp(shname, "xdp", 3) == 0 \|\|
		memcmp(shname, "perf_event", 10) == 0 \|\|
		memcmp(shname, "socket", 6) == 0 \|\|

samples/bpf/test_overhead_raw_tp_kern.c

0 → 100644

+17 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/* Copyright (c) 2018 Facebook */
		#include <uapi/linux/bpf.h>
		#include "bpf_helpers.h"

		SEC("raw_tracepoint/task_rename")
		int prog(struct bpf_raw_tracepoint_args *ctx)
		{
		return 0;
		}

		SEC("raw_tracepoint/urandom_read")
		int prog2(struct bpf_raw_tracepoint_args *ctx)
		{
		return 0;
		}
		char _license[] SEC("license") = "GPL";

samples/bpf/test_overhead_user.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -158,5 +158,17 @@ int main(int argc, char **argv)
		unload_progs();
		}

		if (test_flags & 0xC0) {
		snprintf(filename, sizeof(filename),
		"%s_raw_tp_kern.o", argv[0]);
		if (load_bpf_file(filename)) {
		printf("%s", bpf_log_buf);
		return 1;
		}
		printf("w/RAW_TRACEPOINT\n");
		run_perf_test(num_cpu, test_flags >> 6);
		unload_progs();
		}

		return 0;
		}

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