linux-kernel - [PATCH 0/5] tracing/syscalls: Add filtering support

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Date:	Wed, 19 Aug 2009 15:51:50 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, Jason Baron <jbaron@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/5] tracing/syscalls: Add filtering support

This patchset adds filtering support for syscall events

For syscall enter events, we can do filtering on syscall
parameters, and for exit events, filter on syscall return
value.

For example, we set 'mode == 0666' (0666 == 0x1b6) to
sys_enter_open, and set 'ret == 0' to sys_exit_open,
and here's the output:

 # echo 'mode == 0666' > events/syscalls/sys_enter_open
 # echo 'ret == 0' > events/syscalls/sys_exit_open
 # echo 1 > events/syscalls/sys_enter_open
 # echo 1 > events/syscalls/sys_exit_open
 # cat trace
 ...
   modprobe-3084 [001] 117.463140: sys_open(filename: 917d3e8, flags: 0, mode: 1b6) 
   modprobe-3084 [001] 117.463176: sys_open -> 0x0
       less-3086 [001] 117.510455: sys_open(filename: 9c6bdb8, flags: 8000, mode: 1b6) 
   sendmail-2574 [001] 122.145840: sys_open(filename: b807a365, flags: 0, mode: 1b6) 
 ...

[PATCH 1/5] tracing/syscalls: Fix fields format for enter events
[PATCH 2/5] tracing/syscalls: Add fields format for exit events
[PATCH 3/5] tracing/events: Add ftrace_event_call param to define_fields()
[PATCH 4/5] tracing/events: Add trace_define_common_fields()
[PATCH 5/5] tracing/syscalls: Add filtering support
---
 include/linux/ftrace_event.h  |   15 ++----
 include/linux/syscalls.h      |   19 +++++--
 include/trace/ftrace.h        |   11 ++---
 include/trace/syscall.h       |   13 ++++-
 kernel/trace/trace_events.c   |   29 +++++++++-
 kernel/trace/trace_export.c   |   13 ++---
 kernel/trace/trace_syscalls.c |  120 +++++++++++++++++++++++++++++++----------
 7 files changed, 156 insertions(+), 64 deletions(-)
--
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