tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2020 Facebook */
3#include "bpf_iter.h"
4#include <bpf/bpf_helpers.h>
5#include <bpf/bpf_tracing.h>
6
7char _license[] SEC("license") = "GPL";
8
9int count = 0;
10int tgid = 0;
11
12SEC("iter/task_file")
13int dump_task_file(struct bpf_iter__task_file *ctx)
14{
15 struct seq_file *seq = ctx->meta->seq;
16 struct task_struct *task = ctx->task;
17 __u32 fd = ctx->fd;
18 struct file *file = ctx->file;
19
20 if (task == (void *)0 || file == (void *)0)
21 return 0;
22
23 if (ctx->meta->seq_num == 0) {
24 count = 0;
25 BPF_SEQ_PRINTF(seq, " tgid gid fd file\n");
26 }
27
28 if (tgid == task->tgid && task->tgid != task->pid)
29 count++;
30
31 BPF_SEQ_PRINTF(seq, "%8d %8d %8d %lx\n", task->tgid, task->pid, fd,
32 (long)file->f_op);
33 return 0;
34}