--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
+ * lttng-test.c
+ *
+ * Linux Trace Toolkit Next Generation Test Module
+ *
+ * Copyright 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/byteorder/generic.h>
+#include <asm/byteorder.h>
+
+#include <lttng/events.h>
+#include <lttng/tracer.h>
+#include <wrapper/tracepoint.h>
+
+#define TP_MODULE_NOAUTOLOAD
+#define LTTNG_PACKAGE_BUILD
+#define CREATE_TRACE_POINTS
+#define TRACE_INCLUDE_PATH instrumentation/events
+#define TRACE_INCLUDE_FILE lttng-test
+#define LTTNG_INSTRUMENTATION
+#include <instrumentation/events/lttng-test.h>
+
+LTTNG_DEFINE_TRACE(lttng_test_filter_event,
+ PARAMS(int anint, int netint, long *values,
+ char *text, size_t textlen,
+ char *etext, uint32_t * net_values),
+ PARAMS(anint, netint, values, text, textlen, etext, net_values)
+);
+
+#define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event"
+
+#define LTTNG_WRITE_COUNT_MAX 64
+
+static struct proc_dir_entry *lttng_test_filter_event_dentry;
+
+static
+void trace_test_event(unsigned int nr_iter)
+{
+ int i, netint;
+ long values[] = { 1, 2, 3 };
+ uint32_t net_values[] = { 1, 2, 3 };
+ char text[10] = "test";
+ char escape[10] = "\\*";
+
+ for (i = 0; i < 3; i++) {
+ net_values[i] = htonl(net_values[i]);
+ }
+ for (i = 0; i < nr_iter; i++) {
+ netint = htonl(i);
+ trace_lttng_test_filter_event(i, netint, values, text, strlen(text), escape, net_values);
+ }
+}
+
+/**
+ * lttng_filter_event_write - trigger a lttng_test_filter_event
+ * @file: file pointer
+ * @user_buf: user string
+ * @count: length to copy
+ *
+ * Return -1 on error, with EFAULT errno. Returns count on success.
+ */
+static
+ssize_t lttng_test_filter_event_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ unsigned int nr_iter;
+ ssize_t written;
+ int ret;
+
+ /* Get the number of iterations */
+ ret = kstrtouint_from_user(user_buf, count, 10, &nr_iter);
+ if (ret) {
+ written = ret;
+ goto end;
+ }
+ /* Trace the event */
+ trace_test_event(nr_iter);
+ written = count;
+ *ppos += written;
+end:
+ return written;
+}
+
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
+static const struct proc_ops lttng_test_filter_event_proc_ops = {
+ .proc_write = lttng_test_filter_event_write,
+};
+#else
+static const struct file_operations lttng_test_filter_event_proc_ops = {
+ .write = lttng_test_filter_event_write,
+};
+#endif
+
+static
+int __init lttng_test_init(void)
+{
+ int ret = 0;
+
+ (void) wrapper_lttng_fixup_sig(THIS_MODULE);
+ wrapper_vmalloc_sync_mappings();
+ lttng_test_filter_event_dentry =
+ proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE,
+ S_IRUGO | S_IWUGO, NULL,
+ <tng_test_filter_event_proc_ops, NULL);
+ if (!lttng_test_filter_event_dentry) {
+ printk(KERN_ERR "Error creating LTTng test filter file\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ ret = __lttng_events_init__lttng_test();
+ if (ret)
+ goto error_events;
+ return ret;
+
+error_events:
+ remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL);
+error:
+ return ret;
+}
+
+module_init(lttng_test_init);
+
+static
+void __exit lttng_test_exit(void)
+{
+ __lttng_events_exit__lttng_test();
+ if (lttng_test_filter_event_dentry)
+ remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL);
+}
+
+module_exit(lttng_test_exit);
+
+MODULE_LICENSE("GPL and additional rights");
+MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
+MODULE_DESCRIPTION("LTTng Test");
+MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
+ __stringify(LTTNG_MODULES_MINOR_VERSION) "."
+ __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
+ LTTNG_MODULES_EXTRAVERSION);