Commit | Line | Data |
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b7cdc182 | 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
9f36eaed | 2 | * |
89406ecd MD |
3 | * lttng-test.c |
4 | * | |
5 | * Linux Trace Toolkit Next Generation Test Module | |
6 | * | |
7 | * Copyright 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
89406ecd MD |
8 | */ |
9 | ||
10 | #include <linux/init.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/proc_fs.h> | |
13 | #include <linux/byteorder/generic.h> | |
3834b99f | 14 | #include <asm/byteorder.h> |
89406ecd | 15 | |
2df37e95 MD |
16 | #include <lttng/events.h> |
17 | #include <lttng/tracer.h> | |
156a3977 | 18 | #include <wrapper/tracepoint.h> |
89406ecd MD |
19 | |
20 | #define TP_MODULE_NOAUTOLOAD | |
21 | #define LTTNG_PACKAGE_BUILD | |
22 | #define CREATE_TRACE_POINTS | |
4f47ccf0 | 23 | #define TRACE_INCLUDE_PATH instrumentation/events |
89406ecd MD |
24 | #define TRACE_INCLUDE_FILE lttng-test |
25 | #define LTTNG_INSTRUMENTATION | |
4f47ccf0 | 26 | #include <instrumentation/events/lttng-test.h> |
89406ecd | 27 | |
0116245f MJ |
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) | |
33 | ); | |
89406ecd MD |
34 | |
35 | #define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event" | |
36 | ||
37 | #define LTTNG_WRITE_COUNT_MAX 64 | |
38 | ||
39 | static struct proc_dir_entry *lttng_test_filter_event_dentry; | |
40 | ||
41 | static | |
42 | void trace_test_event(unsigned int nr_iter) | |
43 | { | |
44 | int i, netint; | |
45 | long values[] = { 1, 2, 3 }; | |
3834b99f | 46 | uint32_t net_values[] = { 1, 2, 3 }; |
89406ecd MD |
47 | char text[10] = "test"; |
48 | char escape[10] = "\\*"; | |
49 | ||
3834b99f MD |
50 | for (i = 0; i < 3; i++) { |
51 | net_values[i] = htonl(net_values[i]); | |
52 | } | |
89406ecd MD |
53 | for (i = 0; i < nr_iter; i++) { |
54 | netint = htonl(i); | |
3834b99f | 55 | trace_lttng_test_filter_event(i, netint, values, text, strlen(text), escape, net_values); |
89406ecd MD |
56 | } |
57 | } | |
58 | ||
59 | /** | |
60 | * lttng_filter_event_write - trigger a lttng_test_filter_event | |
61 | * @file: file pointer | |
62 | * @user_buf: user string | |
63 | * @count: length to copy | |
64 | * | |
65 | * Return -1 on error, with EFAULT errno. Returns count on success. | |
66 | */ | |
67 | static | |
68 | ssize_t lttng_test_filter_event_write(struct file *file, const char __user *user_buf, | |
69 | size_t count, loff_t *ppos) | |
70 | { | |
71 | unsigned int nr_iter; | |
72 | ssize_t written; | |
73 | int ret; | |
74 | ||
75 | /* Get the number of iterations */ | |
1a9417ef | 76 | ret = kstrtouint_from_user(user_buf, count, 10, &nr_iter); |
89406ecd MD |
77 | if (ret) { |
78 | written = ret; | |
79 | goto end; | |
80 | } | |
81 | /* Trace the event */ | |
82 | trace_test_event(nr_iter); | |
83 | written = count; | |
84 | *ppos += written; | |
85 | end: | |
86 | return written; | |
87 | } | |
88 | ||
5f4c791e | 89 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) |
059de147 MJ |
90 | static const struct proc_ops lttng_test_filter_event_proc_ops = { |
91 | .proc_write = lttng_test_filter_event_write, | |
92 | }; | |
93 | #else | |
94 | static const struct file_operations lttng_test_filter_event_proc_ops = { | |
89406ecd MD |
95 | .write = lttng_test_filter_event_write, |
96 | }; | |
059de147 | 97 | #endif |
89406ecd MD |
98 | |
99 | static | |
100 | int __init lttng_test_init(void) | |
101 | { | |
102 | int ret = 0; | |
103 | ||
104 | (void) wrapper_lttng_fixup_sig(THIS_MODULE); | |
263b6c88 | 105 | wrapper_vmalloc_sync_mappings(); |
89406ecd MD |
106 | lttng_test_filter_event_dentry = |
107 | proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE, | |
108 | S_IRUGO | S_IWUGO, NULL, | |
059de147 | 109 | <tng_test_filter_event_proc_ops, NULL); |
89406ecd MD |
110 | if (!lttng_test_filter_event_dentry) { |
111 | printk(KERN_ERR "Error creating LTTng test filter file\n"); | |
112 | ret = -ENOMEM; | |
113 | goto error; | |
114 | } | |
115 | ret = __lttng_events_init__lttng_test(); | |
116 | if (ret) | |
117 | goto error_events; | |
118 | return ret; | |
119 | ||
120 | error_events: | |
121 | remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL); | |
122 | error: | |
123 | return ret; | |
124 | } | |
125 | ||
126 | module_init(lttng_test_init); | |
127 | ||
128 | static | |
129 | void __exit lttng_test_exit(void) | |
130 | { | |
131 | __lttng_events_exit__lttng_test(); | |
132 | if (lttng_test_filter_event_dentry) | |
133 | remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL); | |
134 | } | |
135 | ||
136 | module_exit(lttng_test_exit); | |
137 | ||
138 | MODULE_LICENSE("GPL and additional rights"); | |
139 | MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>"); | |
140 | MODULE_DESCRIPTION("LTTng Test"); | |
141 | MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." | |
142 | __stringify(LTTNG_MODULES_MINOR_VERSION) "." | |
143 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) | |
144 | LTTNG_MODULES_EXTRAVERSION); |