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 7 char _license[] SEC("license") = "GPL"; 8 9 int count = 0; 10 int tgid = 0; 11 12 SEC("iter/task_file") 13 int 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 } 35