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27d7fdf06f
The canonical location for the tracefs filesystem is at /sys/kernel/tracing. But, from Documentation/trace/ftrace.rst: Before 4.1, all ftrace tracing control files were within the debugfs file system, which is typically located at /sys/kernel/debug/tracing. For backward compatibility, when mounting the debugfs file system, the tracefs file system will be automatically mounted at: /sys/kernel/debug/tracing Many comments and samples in the bpf code still refer to this older debugfs path, so let's update them to avoid confusion. There are a few spots where the bpf code explicitly checks both tracefs and debugfs (tools/bpf/bpftool/tracelog.c and tools/lib/api/fs/fs.c) and I've left those alone so that the tools can continue to work with both paths. Signed-off-by: Ross Zwisler <zwisler@google.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20230313205628.1058720-2-zwisler@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
48 lines
992 B
C
48 lines
992 B
C
/* Copyright (c) 2016 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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/* from /sys/kernel/tracing/events/task/task_rename/format */
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struct task_rename {
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__u64 pad;
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__u32 pid;
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char oldcomm[TASK_COMM_LEN];
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char newcomm[TASK_COMM_LEN];
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__u16 oom_score_adj;
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};
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SEC("tracepoint/task/task_rename")
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int prog(struct task_rename *ctx)
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{
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return 0;
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}
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/* from /sys/kernel/tracing/events/fib/fib_table_lookup/format */
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struct fib_table_lookup {
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__u64 pad;
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__u32 tb_id;
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int err;
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int oif;
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int iif;
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__u8 proto;
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__u8 tos;
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__u8 scope;
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__u8 flags;
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__u8 src[4];
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__u8 dst[4];
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__u8 gw4[4];
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__u8 gw6[16];
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__u16 sport;
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__u16 dport;
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char name[16];
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};
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SEC("tracepoint/fib/fib_table_lookup")
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int prog2(struct fib_table_lookup *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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