1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2020 Facebook */ 3 #define bpf_iter_meta bpf_iter_meta___not_used 4 #define bpf_iter__task bpf_iter__task___not_used 5 #include "vmlinux.h" 6 #undef bpf_iter_meta 7 #undef bpf_iter__task 8 #include <bpf/bpf_helpers.h> 9 10 char _license[] SEC("license") = "GPL"; 11 12 struct bpf_iter_meta { 13 struct seq_file *seq; 14 __u64 session_id; 15 __u64 seq_num; 16 } __attribute__((preserve_access_index)); 17 18 struct bpf_iter__task { 19 struct bpf_iter_meta *meta; 20 struct task_struct *task; 21 } __attribute__((preserve_access_index)); 22 23 SEC("iter/task") 24 int dump_task(struct bpf_iter__task *ctx) 25 { 26 struct seq_file *seq = ctx->meta->seq; 27 struct task_struct *task = ctx->task; 28 int tgid; 29 30 tgid = task->tgid; 31 bpf_seq_write(seq, &tgid, sizeof(tgid)); 32 return 0; 33 } 34