| 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 |