linux-kernel - [PATCH 3/5] tracing: Allow raw syscall trace events for non privileged users

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Message-Id: <1290043963-1480-4-git-send-regression-fweisbec@gmail.com>
Date:	Thu, 18 Nov 2010 02:32:41 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Li Zefan <lizf@...fujitsu.com>, Jason Baron <jbaron@...hat.com>
Subject: [PATCH 3/5] tracing: Allow raw syscall trace events for non privileged users

This allows non privileged users to use the raw syscall trace events
for task bound tracing in perf.

It is safe because raw syscall trace events don't leak system wide
informations.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Li Zefan <lizf@...fujitsu.com>
Cc: Jason Baron <jbaron@...hat.com>
---
 include/trace/events/syscalls.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/trace/events/syscalls.h b/include/trace/events/syscalls.h
index fb726ac..5a4c04a 100644
--- a/include/trace/events/syscalls.h
+++ b/include/trace/events/syscalls.h
@@ -40,6 +40,8 @@ TRACE_EVENT_FN(sys_enter,
 	syscall_regfunc, syscall_unregfunc
 );
 
+TRACE_EVENT_FLAGS(sys_enter, TRACE_EVENT_FL_CAP_ANY)
+
 TRACE_EVENT_FN(sys_exit,
 
 	TP_PROTO(struct pt_regs *regs, long ret),
@@ -62,6 +64,8 @@ TRACE_EVENT_FN(sys_exit,
 	syscall_regfunc, syscall_unregfunc
 );
 
+TRACE_EVENT_FLAGS(sys_exit, TRACE_EVENT_FL_CAP_ANY)
+
 #endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */
 
 #endif /* _TRACE_EVENTS_SYSCALLS_H */
-- 
1.6.2.3

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