858e8b2eb4
Modified existing bpf_iter_test_file.c program to check whether all accessed files from the main thread or not. Modified existing bpf_iter_test_file program to check whether all accessed files from the main thread or not. $ ./test_progs -n 4 ... #4/7 task_file:OK ... #4 bpf_iter:OK Summary: 1/24 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200902023113.1672863-1-yhs@fb.com
35 lines
777 B
C
35 lines
777 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2020 Facebook */
|
|
#include "bpf_iter.h"
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
int count = 0;
|
|
int tgid = 0;
|
|
|
|
SEC("iter/task_file")
|
|
int dump_task_file(struct bpf_iter__task_file *ctx)
|
|
{
|
|
struct seq_file *seq = ctx->meta->seq;
|
|
struct task_struct *task = ctx->task;
|
|
__u32 fd = ctx->fd;
|
|
struct file *file = ctx->file;
|
|
|
|
if (task == (void *)0 || file == (void *)0)
|
|
return 0;
|
|
|
|
if (ctx->meta->seq_num == 0) {
|
|
count = 0;
|
|
BPF_SEQ_PRINTF(seq, " tgid gid fd file\n");
|
|
}
|
|
|
|
if (tgid == task->tgid && task->tgid != task->pid)
|
|
count++;
|
|
|
|
BPF_SEQ_PRINTF(seq, "%8d %8d %8d %lx\n", task->tgid, task->pid, fd,
|
|
(long)file->f_op);
|
|
return 0;
|
|
}
|