projects / linux-block.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 | ||
| cc9f2f8f MD |
22 | trace_mark(subsystem_event, "integer %d string %s", 123, |
| 23 | "example string"); | |
| 31155bc0 MD |
24 | for (i = 0; i < 10; i++) |
| 25 | trace_mark(subsystem_eventb, MARK_NOARGS); | |
| 26 | return -EPERM; | |
| 27 | } | |
| 28 | ||
| 29 | static struct file_operations mark_ops = { | |
| 30 | .open = my_open, | |
| 31 | }; | |
| 32 | ||
| 7ec7fb39 | 33 | static int __init example_init(void) |
| 31155bc0 MD |
34 | { |
| 35 | printk(KERN_ALERT "example init\n"); | |
| 16e70f64 DL |
36 | pentry_example = proc_create("marker-example", 0444, NULL, &mark_ops); |
| 37 | if (!pentry_example) | |
| 31155bc0 MD |
38 | return -EPERM; |
| 39 | return 0; | |
| 40 | } | |
| 41 | ||
| 7ec7fb39 | 42 | static void __exit example_exit(void) |
| 31155bc0 MD |
43 | { |
| 44 | printk(KERN_ALERT "example exit\n"); | |
| 45 | remove_proc_entry("marker-example", NULL); | |
| 46 | } | |
| 47 | ||
| 48 | module_init(example_init) | |
| 49 | module_exit(example_exit) | |
| 50 | ||
| 51 | MODULE_LICENSE("GPL"); | |
| 52 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
| 53 | MODULE_DESCRIPTION("Marker example"); |