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