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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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e626a13f6f
Drop bpf_iter.h header which uses vmlinux.h but re-defines a bunch of iterator structures and some of BPF constants for use in BPF iterator selftests. None of that is necessary when fresh vmlinux.h header is generated for vmlinux image that matches latest selftests. So drop ugly hacks and have a nice plain vmlinux.h usage everywhere. We could do the same with all the kfunc __ksym redefinitions, but that has dependency on very fresh pahole, so I'm not addressing that here. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20241029203919.1948941-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
38 lines
779 B
C
38 lines
779 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022 Google */
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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char _license[] SEC("license") = "GPL";
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int terminate_early = 0;
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u64 terminal_cgroup = 0;
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static inline u64 cgroup_id(struct cgroup *cgrp)
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{
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return cgrp->kn->id;
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}
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SEC("iter/cgroup")
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int cgroup_id_printer(struct bpf_iter__cgroup *ctx)
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{
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struct seq_file *seq = ctx->meta->seq;
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struct cgroup *cgrp = ctx->cgroup;
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/* epilogue */
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if (cgrp == NULL) {
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BPF_SEQ_PRINTF(seq, "epilogue\n");
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return 0;
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}
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/* prologue */
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if (ctx->meta->seq_num == 0)
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BPF_SEQ_PRINTF(seq, "prologue\n");
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BPF_SEQ_PRINTF(seq, "%8llu\n", cgroup_id(cgrp));
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if (terminal_cgroup == cgroup_id(cgrp))
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return 1;
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return terminate_early ? 1 : 0;
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}
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