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