// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020, Oracle and/or its affiliates. */ #include <vmlinux.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_core_read.h> #include <errno.h> char _license[] SEC("license") = "GPL"; long tasks = 0; long seq_err = 0; bool skip = false; SEC("iter/task") int dump_task_struct(struct bpf_iter__task *ctx) { struct seq_file *seq = ctx->meta->seq; struct task_struct *task = ctx->task; static struct btf_ptr ptr = { }; long ret; #if __has_builtin(__builtin_btf_type_id) ptr.type_id = bpf_core_type_id_kernel(struct task_struct); ptr.ptr = task; if (ctx->meta->seq_num == 0) BPF_SEQ_PRINTF(seq, "Raw BTF task\n"); ret = bpf_seq_printf_btf(seq, &ptr, sizeof(ptr), 0); switch (ret) { case 0: tasks++; break; case -ERANGE: /* NULL task or task->fs, don't count it as an error. */ break; case -E2BIG: return 1; default: seq_err = ret; break; } #else skip = true; #endif return 0; }