/* marker-example.c * * Executes a marker when /proc/marker-example is opened. * * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> * * This file is released under the GPLv2. * See the file COPYING for more details. */ #include <linux/module.h> #include <linux/marker.h> #include <linux/sched.h> #include <linux/proc_fs.h> struct proc_dir_entry *pentry_example; static int my_open(struct inode *inode, struct file *file) { int i; trace_mark(subsystem_event, "integer %d string %s", 123, "example string"); for (i = 0; i < 10; i++) trace_mark(subsystem_eventb, MARK_NOARGS); return -EPERM; } static struct file_operations mark_ops = { .open = my_open, }; static int example_init(void) { printk(KERN_ALERT "example init\n"); pentry_example = proc_create("marker-example", 0444, NULL, &mark_ops); if (!pentry_example) return -EPERM; return 0; } static void example_exit(void) { printk(KERN_ALERT "example exit\n"); remove_proc_entry("marker-example", NULL); } module_init(example_init) module_exit(example_exit) MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mathieu Desnoyers"); MODULE_DESCRIPTION("Marker example");