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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020, Oracle and/or its affiliates. */
#include "bpf_iter.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.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;
}
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