From 05e59e5fb0064c97a1c10921ecd549f2d4a58565 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 09 Oct 2024 06:14:40 +0000
Subject: [PATCH] add REDIRECT
---
kernel/samples/bpf/syscall_tp_user.c | 59 +++++++++++++++++++++++++++++++++++++++++++----------------
1 files changed, 43 insertions(+), 16 deletions(-)
diff --git a/kernel/samples/bpf/syscall_tp_user.c b/kernel/samples/bpf/syscall_tp_user.c
index 1a1d005..76a1d00 100644
--- a/kernel/samples/bpf/syscall_tp_user.c
+++ b/kernel/samples/bpf/syscall_tp_user.c
@@ -1,23 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2017 Facebook
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
-#include <signal.h>
-#include <linux/bpf.h>
#include <string.h>
#include <linux/perf_event.h>
#include <errno.h>
-#include <assert.h>
-#include <stdbool.h>
#include <sys/resource.h>
+#include <bpf/libbpf.h>
#include <bpf/bpf.h>
-#include "bpf_load.h"
/* This program verifies bpf attachment to tracepoint sys_enter_* and sys_exit_*.
* This requires kernel CONFIG_FTRACE_SYSCALLS to be set.
@@ -52,16 +45,44 @@
static int test(char *filename, int num_progs)
{
- int i, fd, map0_fds[num_progs], map1_fds[num_progs];
+ int map0_fds[num_progs], map1_fds[num_progs], fd, i, j = 0;
+ struct bpf_link *links[num_progs * 4];
+ struct bpf_object *objs[num_progs];
+ struct bpf_program *prog;
for (i = 0; i < num_progs; i++) {
- if (load_bpf_file(filename)) {
- fprintf(stderr, "%s", bpf_log_buf);
- return 1;
+ objs[i] = bpf_object__open_file(filename, NULL);
+ if (libbpf_get_error(objs[i])) {
+ fprintf(stderr, "opening BPF object file failed\n");
+ objs[i] = NULL;
+ goto cleanup;
}
- printf("prog #%d: map ids %d %d\n", i, map_fd[0], map_fd[1]);
- map0_fds[i] = map_fd[0];
- map1_fds[i] = map_fd[1];
+
+ /* load BPF program */
+ if (bpf_object__load(objs[i])) {
+ fprintf(stderr, "loading BPF object file failed\n");
+ goto cleanup;
+ }
+
+ map0_fds[i] = bpf_object__find_map_fd_by_name(objs[i],
+ "enter_open_map");
+ map1_fds[i] = bpf_object__find_map_fd_by_name(objs[i],
+ "exit_open_map");
+ if (map0_fds[i] < 0 || map1_fds[i] < 0) {
+ fprintf(stderr, "finding a map in obj file failed\n");
+ goto cleanup;
+ }
+
+ bpf_object__for_each_program(prog, objs[i]) {
+ links[j] = bpf_program__attach(prog);
+ if (libbpf_get_error(links[j])) {
+ fprintf(stderr, "bpf_program__attach failed\n");
+ links[j] = NULL;
+ goto cleanup;
+ }
+ j++;
+ }
+ printf("prog #%d: map ids %d %d\n", i, map0_fds[i], map1_fds[i]);
}
/* current load_bpf_file has perf_event_open default pid = -1
@@ -83,6 +104,12 @@
verify_map(map1_fds[i]);
}
+cleanup:
+ for (j--; j >= 0; j--)
+ bpf_link__destroy(links[j]);
+
+ for (i--; i >= 0; i--)
+ bpf_object__close(objs[i]);
return 0;
}
--
Gitblit v1.6.2