3087c61ed2
As the sched:sched_switch tracepoint args are derived from the kernel, we'd better make it same with the kernel. So the macro TASK_COMM_LEN is converted to type enum, then all the BPF programs can get it through BTF. The BPF program which wants to use TASK_COMM_LEN should include the header vmlinux.h. Regarding the test_stacktrace_map and test_tracepoint, as the type defined in linux/bpf.h are also defined in vmlinux.h, so we don't need to include linux/bpf.h again. Link: https://lkml.kernel.org/r/20211120112738.45980-8-laoar.shao@gmail.com Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: David Hildenbrand <david@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> Cc: Michal Miroslaw <mirq-linux@rere.qmqm.pl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: David Hildenbrand <david@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
26 lines
534 B
C
26 lines
534 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2017 Facebook
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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/* taken from /sys/kernel/debug/tracing/events/sched/sched_switch/format */
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struct sched_switch_args {
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unsigned long long pad;
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char prev_comm[TASK_COMM_LEN];
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int prev_pid;
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int prev_prio;
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long long prev_state;
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char next_comm[TASK_COMM_LEN];
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int next_pid;
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int next_prio;
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};
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SEC("tracepoint/sched/sched_switch")
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int oncpu(struct sched_switch_args *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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