1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
5 * Linux Trace Toolkit Next Generation Test Module
7 * Copyright 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/proc_fs.h>
13 #include <linux/byteorder/generic.h>
14 #include <asm/byteorder.h>
16 #include <lttng/events.h>
17 #include <lttng/tracer.h>
18 #include <wrapper/tracepoint.h>
20 #define TP_MODULE_NOAUTOLOAD
21 #define LTTNG_PACKAGE_BUILD
22 #define CREATE_TRACE_POINTS
23 #define TRACE_INCLUDE_PATH instrumentation/events
24 #define TRACE_INCLUDE_FILE lttng-test
25 #define LTTNG_INSTRUMENTATION
26 #include <instrumentation/events/lttng-test.h>
28 LTTNG_DEFINE_TRACE(lttng_test_filter_event
,
29 PARAMS(int anint
, int netint
, long *values
,
30 char *text
, size_t textlen
,
31 char *etext
, uint32_t * net_values
),
32 PARAMS(anint
, netint
, values
, text
, textlen
, etext
, net_values
)
35 #define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event"
37 #define LTTNG_WRITE_COUNT_MAX 64
39 static struct proc_dir_entry
*lttng_test_filter_event_dentry
;
42 void trace_test_event(unsigned int nr_iter
)
45 long values
[] = { 1, 2, 3 };
46 uint32_t net_values
[] = { 1, 2, 3 };
47 char text
[10] = "test";
48 char escape
[10] = "\\*";
50 for (i
= 0; i
< 3; i
++) {
51 net_values
[i
] = htonl(net_values
[i
]);
53 for (i
= 0; i
< nr_iter
; i
++) {
55 trace_lttng_test_filter_event(i
, netint
, values
, text
, strlen(text
), escape
, net_values
);
60 * lttng_filter_event_write - trigger a lttng_test_filter_event
62 * @user_buf: user string
63 * @count: length to copy
65 * Return -1 on error, with EFAULT errno. Returns count on success.
68 ssize_t
lttng_test_filter_event_write(struct file
*file
, const char __user
*user_buf
,
69 size_t count
, loff_t
*ppos
)
75 /* Get the number of iterations */
76 ret
= kstrtouint_from_user(user_buf
, count
, 10, &nr_iter
);
82 trace_test_event(nr_iter
);
89 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
90 static const struct proc_ops lttng_test_filter_event_proc_ops
= {
91 .proc_write
= lttng_test_filter_event_write
,
94 static const struct file_operations lttng_test_filter_event_proc_ops
= {
95 .write
= lttng_test_filter_event_write
,
100 int __init
lttng_test_init(void)
104 wrapper_vmalloc_sync_mappings();
105 lttng_test_filter_event_dentry
=
106 proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE
,
107 S_IRUGO
| S_IWUGO
, NULL
,
108 <tng_test_filter_event_proc_ops
, NULL
);
109 if (!lttng_test_filter_event_dentry
) {
110 printk(KERN_ERR
"Error creating LTTng test filter file\n");
114 ret
= __lttng_events_init__lttng_test();
120 remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE
, NULL
);
125 module_init(lttng_test_init
);
128 void __exit
lttng_test_exit(void)
130 __lttng_events_exit__lttng_test();
131 if (lttng_test_filter_event_dentry
)
132 remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE
, NULL
);
135 module_exit(lttng_test_exit
);
137 MODULE_LICENSE("GPL and additional rights");
138 MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
139 MODULE_DESCRIPTION("LTTng Test");
140 MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION
) "."
141 __stringify(LTTNG_MODULES_MINOR_VERSION
) "."
142 __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION
)
143 LTTNG_MODULES_EXTRAVERSION
);