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Fix oinkmaster patch.
[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.trace / tracepoints-samples.patch
CommitLineData
2cb7cef9
BS		 1From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
2Subject: Tracepoints Samples
3
4Tracepoint example code under samples/.
5
6Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
7Acked-by: 'Peter Zijlstra' <peterz@infradead.org>
8CC: Masami Hiramatsu <mhiramat@redhat.com>
9CC: "Frank Ch. Eigler" <fche@redhat.com>
10CC: 'Ingo Molnar' <mingo@elte.hu>
11CC: 'Hideo AOKI' <haoki@redhat.com>
12CC: Takashi Nishiie <t-nishiie@np.css.fujitsu.com>
13CC: 'Steven Rostedt' <rostedt@goodmis.org>
14CC: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
15Acked-by: Jan Blunck <jblunck@suse.de>
16---
17 samples/Kconfig | 6 ++
18 samples/Makefile | 2
19 samples/tracepoints/Makefile | 6 ++
20 samples/tracepoints/tp-samples-trace.h | 13 +++++
21 samples/tracepoints/tracepoint-probe-sample.c | 55 +++++++++++++++++++++++++
22 samples/tracepoints/tracepoint-probe-sample2.c | 42 +++++++++++++++++++
23 samples/tracepoints/tracepoint-sample.c | 53 ++++++++++++++++++++++++
24 7 files changed, 176 insertions(+), 1 deletion(-)
25
26Index: linux-2.6-lttng/samples/Kconfig
27===================================================================
28--- linux-2.6-lttng.orig/samples/Kconfig 2008-07-07 09:59:25.000000000 -0400
29+++ linux-2.6-lttng/samples/Kconfig 2008-07-07 10:00:07.000000000 -0400
30@@ -13,6 +13,12 @@ config SAMPLE_MARKERS
31 help
32 This build markers example modules.
33
34+config SAMPLE_TRACEPOINTS
35+ tristate "Build tracepoints examples -- loadable modules only"
36+ depends on TRACEPOINTS && m
37+ help
38+ This build tracepoints example modules.
39+
40 config SAMPLE_KOBJECT
41 tristate "Build kobject examples"
42 help
43Index: linux-2.6-lttng/samples/tracepoints/Makefile
44===================================================================
45--- /dev/null 1970-01-01 00:00:00.000000000 +0000
46+++ linux-2.6-lttng/samples/tracepoints/Makefile 2008-07-07 10:53:09.000000000 -0400
47@@ -0,0 +1,6 @@
48+# builds the tracepoint example kernel modules;
49+# then to use one (as root): insmod <module_name.ko>
50+
51+obj-$(CONFIG_SAMPLE_TRACEPOINTS) += tracepoint-sample.o
52+obj-$(CONFIG_SAMPLE_TRACEPOINTS) += tracepoint-probe-sample.o
53+obj-$(CONFIG_SAMPLE_TRACEPOINTS) += tracepoint-probe-sample2.o
54Index: linux-2.6-lttng/samples/tracepoints/tracepoint-probe-sample.c
55===================================================================
56--- /dev/null 1970-01-01 00:00:00.000000000 +0000
57+++ linux-2.6-lttng/samples/tracepoints/tracepoint-probe-sample.c 2008-07-07 10:50:26.000000000 -0400
58@@ -0,0 +1,55 @@
59+/*
60+ * tracepoint-probe-sample.c
61+ *
62+ * sample tracepoint probes.
63+ */
64+
65+#include <linux/module.h>
66+#include <linux/file.h>
67+#include <linux/dcache.h>
68+#include "tp-samples-trace.h"
69+
70+/*
71+ * Here the caller only guarantees locking for struct file and struct inode.
72+ * Locking must therefore be done in the probe to use the dentry.
73+ */
74+static void probe_subsys_event(struct inode *inode, struct file *file)
75+{
76+ path_get(&file->f_path);
77+ dget(file->f_path.dentry);
78+ printk(KERN_INFO "Event is encountered with filename %s\n",
79+ file->f_path.dentry->d_name.name);
80+ dput(file->f_path.dentry);
81+ path_put(&file->f_path);
82+}
83+
84+static void probe_subsys_eventb(void)
85+{
86+ printk(KERN_INFO "Event B is encountered\n");
87+}
88+
89+int __init tp_sample_trace_init(void)
90+{
91+ int ret;
92+
93+ ret = register_trace_subsys_event(probe_subsys_event);
94+ WARN_ON(ret);
95+ ret = register_trace_subsys_eventb(probe_subsys_eventb);
96+ WARN_ON(ret);
97+
98+ return 0;
99+}
100+
101+module_init(tp_sample_trace_init);
102+
103+void __exit tp_sample_trace_exit(void)
104+{
105+ unregister_trace_subsys_eventb(probe_subsys_eventb);
106+ unregister_trace_subsys_event(probe_subsys_event);
107+}
108+
109+module_exit(tp_sample_trace_exit);
110+
111+MODULE_LICENSE("GPL");
112+MODULE_AUTHOR("Mathieu Desnoyers");
113+MODULE_DESCRIPTION("Tracepoint Probes Samples");
114Index: linux-2.6-lttng/samples/tracepoints/tracepoint-sample.c
115===================================================================
116--- /dev/null 1970-01-01 00:00:00.000000000 +0000
117+++ linux-2.6-lttng/samples/tracepoints/tracepoint-sample.c 2008-07-07 10:04:16.000000000 -0400
118@@ -0,0 +1,53 @@
119+/* tracepoint-sample.c
120+ *
121+ * Executes a tracepoint when /proc/tracepoint-example is opened.
122+ *
123+ * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
124+ *
125+ * This file is released under the GPLv2.
126+ * See the file COPYING for more details.
127+ */
128+
129+#include <linux/module.h>
130+#include <linux/sched.h>
131+#include <linux/proc_fs.h>
132+#include "tp-samples-trace.h"
133+
134+struct proc_dir_entry *pentry_example;
135+
136+static int my_open(struct inode *inode, struct file *file)
137+{
138+ int i;
139+
140+ trace_subsys_event(inode, file);
141+ for (i = 0; i < 10; i++)
142+ trace_subsys_eventb();
143+ return -EPERM;
144+}
145+
146+static struct file_operations mark_ops = {
147+ .open = my_open,
148+};
149+
150+static int example_init(void)
151+{
152+ printk(KERN_ALERT "example init\n");
153+ pentry_example = proc_create("tracepoint-example", 0444, NULL,
154+ &mark_ops);
155+ if (!pentry_example)
156+ return -EPERM;
157+ return 0;
158+}
159+
160+static void example_exit(void)
161+{
162+ printk(KERN_ALERT "example exit\n");
163+ remove_proc_entry("tracepoint-example", NULL);
164+}
165+
166+module_init(example_init)
167+module_exit(example_exit)
168+
169+MODULE_LICENSE("GPL");
170+MODULE_AUTHOR("Mathieu Desnoyers");
171+MODULE_DESCRIPTION("Tracepoint example");
172Index: linux-2.6-lttng/samples/tracepoints/tp-samples-trace.h
173===================================================================
174--- /dev/null 1970-01-01 00:00:00.000000000 +0000
175+++ linux-2.6-lttng/samples/tracepoints/tp-samples-trace.h 2008-07-07 10:06:26.000000000 -0400
176@@ -0,0 +1,13 @@
177+#ifndef _TP_SAMPLES_TRACE_H
178+#define _TP_SAMPLES_TRACE_H
179+
180+#include <linux/proc_fs.h> /* for struct inode and struct file */
181+#include <linux/tracepoint.h>
182+
183+DEFINE_TRACE(subsys_event,
184+ TPPROTO(struct inode *inode, struct file *file),
185+ TPARGS(inode, file));
186+DEFINE_TRACE(subsys_eventb,
187+ TPPROTO(void),
188+ TPARGS());
189+#endif
190Index: linux-2.6-lttng/samples/Makefile
191===================================================================
192--- linux-2.6-lttng.orig/samples/Makefile 2008-07-07 10:44:50.000000000 -0400
193+++ linux-2.6-lttng/samples/Makefile 2008-07-07 10:44:59.000000000 -0400
194@@ -1,3 +1,3 @@
195 # Makefile for Linux samples code
196
197-obj-$(CONFIG_SAMPLES) += markers/ kobject/ kprobes/
198+obj-$(CONFIG_SAMPLES) += markers/ kobject/ kprobes/ tracepoints/
199Index: linux-2.6-lttng/samples/tracepoints/tracepoint-probe-sample2.c
200===================================================================
201--- /dev/null 1970-01-01 00:00:00.000000000 +0000
202+++ linux-2.6-lttng/samples/tracepoints/tracepoint-probe-sample2.c 2008-07-07 10:56:09.000000000 -0400
203@@ -0,0 +1,42 @@
204+/*
205+ * tracepoint-probe-sample2.c
206+ *
207+ * 2nd sample tracepoint probes.
208+ */
209+
210+#include <linux/module.h>
211+#include <linux/fs.h>
212+#include "tp-samples-trace.h"
213+
214+/*
215+ * Here the caller only guarantees locking for struct file and struct inode.
216+ * Locking must therefore be done in the probe to use the dentry.
217+ */
218+static void probe_subsys_event(struct inode *inode, struct file *file)
219+{
220+ printk(KERN_INFO "Event is encountered with inode number %lu\n",
221+ inode->i_ino);
222+}
223+
224+int __init tp_sample_trace_init(void)
225+{
226+ int ret;
227+
228+ ret = register_trace_subsys_event(probe_subsys_event);
229+ WARN_ON(ret);
230+
231+ return 0;
232+}
233+
234+module_init(tp_sample_trace_init);
235+
236+void __exit tp_sample_trace_exit(void)
237+{
238+ unregister_trace_subsys_event(probe_subsys_event);
239+}
240+
241+module_exit(tp_sample_trace_exit);
242+
243+MODULE_LICENSE("GPL");
244+MODULE_AUTHOR("Mathieu Desnoyers");
245+MODULE_DESCRIPTION("Tracepoint Probes Samples");
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