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tracing: Do not show filter file for ftrace internal events 

The filter file in the ftrace internal events, like in
/sys/kernel/tracing/events/ftrace/function/filter is not attached to any
functionality. Do not create them as they are meaningless.

In the future, if an ftrace internal event gets filter functionality, then
it will need to create it directly.

Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2018-05-09 09:48:41 -04:00
parent af3dcb53bd
commit 5d948c86bb
1 changed files with 6 additions and 4 deletions
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10
kernel/trace/trace_events.c
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@ -2007,16 +2007,18 @@ event_create_dir(struct dentry *parent, struct trace_event_file *file)
return -1;
}
}
trace_create_file("filter", 0644, file->dir, file,
&ftrace_event_filter_fops);
/*
* Only event directories that can be enabled should have
* triggers.
* triggers or filters.
*/
if (!(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE))
if (!(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE)) {
trace_create_file("filter", 0644, file->dir, file,
&ftrace_event_filter_fops);
trace_create_file("trigger", 0644, file->dir, file,
&event_trigger_fops);
}
#ifdef CONFIG_HIST_TRIGGERS
trace_create_file("hist", 0444, file->dir, file,