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tracing/eprobe: Fix alloc event dir failed when event name no set

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The event dir will alloc failed when event name no set, using the
command:
"echo "e:esys/ syscalls/sys_enter_openat file=\$filename:string"
>> dynamic_events"
It seems that dir name="syscalls/sys_enter_openat" is not allowed
in debugfs. So just use the "sys_enter_openat" as the event name.

Link: https://lkml.kernel.org/r/1664028814-45923-1-git-send-email-chentao.kernel@linux.alibaba.com

Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Linyu Yuan <quic_linyyuan@quicinc.com>
Cc: Tao Chen <chentao.kernel@linux.alibaba.com
Cc: stable@vger.kernel.org
Fixes: 95c104c378dc ("tracing: Auto generate event name when creating a group of events")
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Tao Chen <chentao.kernel@linux.alibaba.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Tao Chen 2022-09-24 22:13:34 +08:00 committed by Steven Rostedt (Google)
parent ae398ad894
commit dc399adecd
1 changed files with 1 additions and 2 deletions
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3
kernel/trace/trace_eprobe.c
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@ -1039,8 +1039,7 @@ static int __trace_eprobe_create(int argc, const char *argv[])
}
if (!event) {
strscpy(buf1, argv[1], MAX_EVENT_NAME_LEN);
sanitize_event_name(buf1);
strscpy(buf1, sys_event, MAX_EVENT_NAME_LEN);
event = buf1;
}