projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 31155bc0 MD |
1 | /* marker-example.c |
| 2 | * | |
| 3 | * Executes a marker when /proc/marker-example is opened. | |
| 4 | * | |
| 5 | * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
| 6 | * | |
| 7 | * This file is released under the GPLv2. | |
| 8 | * See the file COPYING for more details. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/marker.h> | |
| 13 | #include <linux/sched.h> | |
| 14 | #include <linux/proc_fs.h> | |
| 15 | ||
| 16 | struct proc_dir_entry *pentry_example; | |
| 17 | ||
| 18 | static int my_open(struct inode *inode, struct file *file) | |
| 19 | { | |
| 20 | int i; | |
| 21 | ||
| 22 | trace_mark(subsystem_event, "%d %s", 123, "example string"); | |
| 23 | for (i = 0; i < 10; i++) | |
| 24 | trace_mark(subsystem_eventb, MARK_NOARGS); | |
| 25 | return -EPERM; | |
| 26 | } | |
| 27 | ||
| 28 | static struct file_operations mark_ops = { | |
| 29 | .open = my_open, | |
| 30 | }; | |
| 31 | ||
| 32 | static int example_init(void) | |
| 33 | { | |
| 34 | printk(KERN_ALERT "example init\n"); | |
| 35 | pentry_example = create_proc_entry("marker-example", 0444, NULL); | |
| 36 | if (pentry_example) | |
| 37 | pentry_example->proc_fops = &mark_ops; | |
| 38 | else | |
| 39 | return -EPERM; | |
| 40 | return 0; | |
| 41 | } | |
| 42 | ||
| 43 | static void example_exit(void) | |
| 44 | { | |
| 45 | printk(KERN_ALERT "example exit\n"); | |
| 46 | remove_proc_entry("marker-example", NULL); | |
| 47 | } | |
| 48 | ||
| 49 | module_init(example_init) | |
| 50 | module_exit(example_exit) | |
| 51 | ||
| 52 | MODULE_LICENSE("GPL"); | |
| 53 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
| 54 | MODULE_DESCRIPTION("Marker example"); |