1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020 Facebook */
3 #include "bpf_iter.h"
4 #include <bpf/bpf_helpers.h>
5
6 char _license[] SEC("license") = "GPL";
7
8 int count = 0;
9 int tgid = 0;
10 int last_tgid = 0;
11 int unique_tgid_count = 0;
12
13 SEC("iter/task_file")
14 int dump_task_file(struct bpf_iter__task_file *ctx)
15 {
16 struct seq_file *seq = ctx->meta->seq;
17 struct task_struct *task = ctx->task;
18 struct file *file = ctx->file;
19 __u32 fd = ctx->fd;
20
21 if (task == (void *)0 || file == (void *)0)
22 return 0;
23
24 if (ctx->meta->seq_num == 0) {
25 count = 0;
26 BPF_SEQ_PRINTF(seq, " tgid gid fd file\n");
27 }
28
29 if (tgid == task->tgid && task->tgid != task->pid)
30 count++;
31
32 if (last_tgid != task->tgid) {
33 last_tgid = task->tgid;
34 unique_tgid_count++;
35 }
36
37 BPF_SEQ_PRINTF(seq, "%8d %8d %8d %lx\n", task->tgid, task->pid, fd,
38 (long)file->f_op);
39 return 0;
40 }
41
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.