4 * Linux Trace Toolkit Next Generation Test Module
6 * Copyright 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; only
11 * version 2.1 of the License.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/proc_fs.h>
26 #include <linux/byteorder/generic.h>
28 #include <lttng-events.h>
29 #include <lttng-tracer.h>
30 #include <wrapper/tracepoint.h>
31 #include <wrapper/kstrtox.h>
33 #define TP_MODULE_NOAUTOLOAD
34 #define LTTNG_PACKAGE_BUILD
35 #define CREATE_TRACE_POINTS
36 #define TRACE_INCLUDE_PATH instrumentation/events/lttng-module
37 #define TRACE_INCLUDE_FILE lttng-test
38 #define LTTNG_INSTRUMENTATION
39 #include <instrumentation/events/lttng-module/lttng-test.h>
41 DEFINE_TRACE(lttng_test_filter_event
);
43 #define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event"
45 #define LTTNG_WRITE_COUNT_MAX 64
47 static struct proc_dir_entry
*lttng_test_filter_event_dentry
;
50 void trace_test_event(unsigned int nr_iter
)
53 long values
[] = { 1, 2, 3 };
54 char text
[10] = "test";
55 char escape
[10] = "\\*";
57 for (i
= 0; i
< nr_iter
; i
++) {
59 trace_lttng_test_filter_event(i
, netint
, values
, text
, strlen(text
), escape
);
64 * lttng_filter_event_write - trigger a lttng_test_filter_event
66 * @user_buf: user string
67 * @count: length to copy
69 * Return -1 on error, with EFAULT errno. Returns count on success.
72 ssize_t
lttng_test_filter_event_write(struct file
*file
, const char __user
*user_buf
,
73 size_t count
, loff_t
*ppos
)
79 /* Get the number of iterations */
80 ret
= lttng_kstrtouint_from_user(user_buf
, count
, 10, &nr_iter
);
86 trace_test_event(nr_iter
);
93 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
94 static const struct proc_ops lttng_test_filter_event_proc_ops
= {
95 .proc_write
= lttng_test_filter_event_write
,
98 static const struct file_operations lttng_test_filter_event_proc_ops
= {
99 .write
= lttng_test_filter_event_write
,
104 int __init
lttng_test_init(void)
108 (void) wrapper_lttng_fixup_sig(THIS_MODULE
);
109 wrapper_vmalloc_sync_all();
110 lttng_test_filter_event_dentry
=
111 proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE
,
112 S_IRUGO
| S_IWUGO
, NULL
,
113 <tng_test_filter_event_proc_ops
, NULL
);
114 if (!lttng_test_filter_event_dentry
) {
115 printk(KERN_ERR
"Error creating LTTng test filter file\n");
119 ret
= __lttng_events_init__lttng_test();
125 remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE
, NULL
);
130 module_init(lttng_test_init
);
133 void __exit
lttng_test_exit(void)
135 __lttng_events_exit__lttng_test();
136 if (lttng_test_filter_event_dentry
)
137 remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE
, NULL
);
140 module_exit(lttng_test_exit
);
142 MODULE_LICENSE("GPL and additional rights");
143 MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
144 MODULE_DESCRIPTION("LTTng Test");
145 MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION
) "."
146 __stringify(LTTNG_MODULES_MINOR_VERSION
) "."
147 __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION
)
148 LTTNG_MODULES_EXTRAVERSION
);