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>
27 #include <asm/byteorder.h>
29 #include <lttng-events.h>
30 #include <lttng-tracer.h>
31 #include <wrapper/tracepoint.h>
32 #include <wrapper/kstrtox.h>
34 #define TP_MODULE_NOAUTOLOAD
35 #define LTTNG_PACKAGE_BUILD
36 #define CREATE_TRACE_POINTS
37 #define TRACE_INCLUDE_PATH instrumentation/events/lttng-module
38 #define TRACE_INCLUDE_FILE lttng-test
39 #define LTTNG_INSTRUMENTATION
40 #include <instrumentation/events/lttng-module/lttng-test.h>
42 DEFINE_TRACE(lttng_test_filter_event
);
44 #define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event"
46 #define LTTNG_WRITE_COUNT_MAX 64
48 static struct proc_dir_entry
*lttng_test_filter_event_dentry
;
51 void trace_test_event(unsigned int nr_iter
)
54 long values
[] = { 1, 2, 3 };
55 uint32_t net_values
[] = { 1, 2, 3 };
56 char text
[10] = "test";
57 char escape
[10] = "\\*";
59 for (i
= 0; i
< 3; i
++) {
60 net_values
[i
] = htonl(net_values
[i
]);
62 for (i
= 0; i
< nr_iter
; i
++) {
64 trace_lttng_test_filter_event(i
, netint
, values
, text
, strlen(text
), escape
, net_values
);
69 * lttng_filter_event_write - trigger a lttng_test_filter_event
71 * @user_buf: user string
72 * @count: length to copy
74 * Return -1 on error, with EFAULT errno. Returns count on success.
77 ssize_t
lttng_test_filter_event_write(struct file
*file
, const char __user
*user_buf
,
78 size_t count
, loff_t
*ppos
)
84 /* Get the number of iterations */
85 ret
= lttng_kstrtouint_from_user(user_buf
, count
, 10, &nr_iter
);
91 trace_test_event(nr_iter
);
98 static const struct file_operations lttng_test_filter_event_operations
= {
99 .write
= lttng_test_filter_event_write
,
103 int __init
lttng_test_init(void)
107 (void) wrapper_lttng_fixup_sig(THIS_MODULE
);
108 wrapper_vmalloc_sync_all();
109 lttng_test_filter_event_dentry
=
110 proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE
,
111 S_IRUGO
| S_IWUGO
, NULL
,
112 <tng_test_filter_event_operations
, NULL
);
113 if (!lttng_test_filter_event_dentry
) {
114 printk(KERN_ERR
"Error creating LTTng test filter file\n");
118 ret
= __lttng_events_init__lttng_test();
124 remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE
, NULL
);
129 module_init(lttng_test_init
);
132 void __exit
lttng_test_exit(void)
134 __lttng_events_exit__lttng_test();
135 if (lttng_test_filter_event_dentry
)
136 remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE
, NULL
);
139 module_exit(lttng_test_exit
);
141 MODULE_LICENSE("GPL and additional rights");
142 MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
143 MODULE_DESCRIPTION("LTTng Test");
144 MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION
) "."
145 __stringify(LTTNG_MODULES_MINOR_VERSION
) "."
146 __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION
)
147 LTTNG_MODULES_EXTRAVERSION
);