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These macros are convenient wrappers around the bpf_seq_printf and bpf_snprintf helpers. They are currently provided by bpf_tracing.h which targets low level tracing primitives. bpf_helpers.h is a better fit. The __bpf_narg and __bpf_apply are needed in both files and provided twice. __bpf_empty isn't used anywhere and is removed from bpf_tracing.h Reported-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Florent Revest <revest@chromium.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210526164643.2881368-1-revest@chromium.org
26 lines
572 B
C
26 lines
572 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include "bpf_iter.h"
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#include <bpf/bpf_helpers.h>
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char _license[] SEC("license") = "GPL";
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SEC("iter/task")
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int dump_task(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 char info[] = " === END ===";
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if (task == (void *)0) {
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BPF_SEQ_PRINTF(seq, "%s\n", info);
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return 0;
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}
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if (ctx->meta->seq_num == 0)
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BPF_SEQ_PRINTF(seq, " tgid gid\n");
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BPF_SEQ_PRINTF(seq, "%8d %8d\n", task->tgid, task->pid);
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return 0;
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}
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