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 11 SEC("iter/task_file") 12 int dump_task_file(struct bpf_iter__task_file *ctx) 13 { 14 struct seq_file *seq = ctx->meta->seq; 15 struct task_struct *task = ctx->task; 16 __u32 fd = ctx->fd; 17 struct file *file = ctx->file; 18 19 if (task == (void *)0 || file == (void *)0) 20 return 0; 21 22 if (ctx->meta->seq_num == 0) { 23 count = 0; 24 BPF_SEQ_PRINTF(seq, " tgid gid fd file\n"); 25 } 26 27 if (tgid == task->tgid && task->tgid != task->pid) 28 count++; 29 30 BPF_SEQ_PRINTF(seq, "%8d %8d %8d %lx\n", task->tgid, task->pid, fd, 31 (long)file->f_op); 32 return 0; 33 } 34