blob: 81ae9ea3c6e1c34e645e4d2541066ddb1f33a9ad [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * file.c - part of debugfs, a tiny little debug file system
3 *
4 * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004 IBM Inc.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version
9 * 2 as published by the Free Software Foundation.
10 *
11 * debugfs is for people to use instead of /proc or /sys.
12 * See Documentation/DocBook/kernel-api for more details.
13 *
14 */
15
16/* uncomment to get debug messages from the debug filesystem, ah the irony. */
17/* #define DEBUG */
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/module.h>
20#include <linux/fs.h>
21#include <linux/mount.h>
22#include <linux/pagemap.h>
23#include <linux/init.h>
Randy Dunlap4d8ebdd2006-11-25 11:09:26 -080024#include <linux/kobject.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/namei.h>
26#include <linux/debugfs.h>
Mathieu Desnoyers4f365572006-11-24 13:45:37 -050027#include <linux/fsnotify.h>
Peter Oberparleiter66f54962007-02-13 12:13:54 +010028#include <linux/string.h>
Mimi Zohar92562922008-10-07 14:00:12 -040029#include <linux/magic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Linus Torvalds1da177e2005-04-16 15:20:36 -070031static struct vfsmount *debugfs_mount;
32static int debugfs_mount_count;
33
34static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t dev)
35{
36 struct inode *inode = new_inode(sb);
37
38 if (inode) {
39 inode->i_mode = mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
41 switch (mode & S_IFMT) {
42 default:
43 init_special_inode(inode, mode, dev);
44 break;
45 case S_IFREG:
46 inode->i_fop = &debugfs_file_operations;
47 break;
Peter Oberparleiter66f54962007-02-13 12:13:54 +010048 case S_IFLNK:
49 inode->i_op = &debugfs_link_operations;
50 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 case S_IFDIR:
52 inode->i_op = &simple_dir_inode_operations;
53 inode->i_fop = &simple_dir_operations;
54
Mathieu Desnoyersbafb2322006-11-24 13:46:30 -050055 /* directory inodes start off with i_nlink == 2
56 * (for "." entry) */
Dave Hansend8c76e62006-09-30 23:29:04 -070057 inc_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 break;
59 }
60 }
61 return inode;
62}
63
64/* SMP-safe */
65static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
66 int mode, dev_t dev)
67{
Jens Axboe71601e22006-06-08 10:26:39 +020068 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 int error = -EPERM;
70
71 if (dentry->d_inode)
72 return -EEXIST;
73
Jens Axboe71601e22006-06-08 10:26:39 +020074 inode = debugfs_get_inode(dir->i_sb, mode, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 if (inode) {
76 d_instantiate(dentry, inode);
77 dget(dentry);
78 error = 0;
79 }
80 return error;
81}
82
83static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
84{
85 int res;
86
87 mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
88 res = debugfs_mknod(dir, dentry, mode, 0);
Mathieu Desnoyers4f365572006-11-24 13:45:37 -050089 if (!res) {
Dave Hansend8c76e62006-09-30 23:29:04 -070090 inc_nlink(dir);
Mathieu Desnoyers4f365572006-11-24 13:45:37 -050091 fsnotify_mkdir(dir, dentry);
92 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 return res;
94}
95
Peter Oberparleiter66f54962007-02-13 12:13:54 +010096static int debugfs_link(struct inode *dir, struct dentry *dentry, int mode)
97{
98 mode = (mode & S_IALLUGO) | S_IFLNK;
99 return debugfs_mknod(dir, dentry, mode, 0);
100}
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102static int debugfs_create(struct inode *dir, struct dentry *dentry, int mode)
103{
Mathieu Desnoyers4f365572006-11-24 13:45:37 -0500104 int res;
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 mode = (mode & S_IALLUGO) | S_IFREG;
Mathieu Desnoyers4f365572006-11-24 13:45:37 -0500107 res = debugfs_mknod(dir, dentry, mode, 0);
108 if (!res)
109 fsnotify_create(dir, dentry);
110 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
113static inline int debugfs_positive(struct dentry *dentry)
114{
115 return dentry->d_inode && !d_unhashed(dentry);
116}
117
118static int debug_fill_super(struct super_block *sb, void *data, int silent)
119{
120 static struct tree_descr debug_files[] = {{""}};
121
122 return simple_fill_super(sb, DEBUGFS_MAGIC, debug_files);
123}
124
David Howells454e2392006-06-23 02:02:57 -0700125static int debug_get_sb(struct file_system_type *fs_type,
126 int flags, const char *dev_name,
127 void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
David Howells454e2392006-06-23 02:02:57 -0700129 return get_sb_single(fs_type, flags, data, debug_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130}
131
132static struct file_system_type debug_fs_type = {
133 .owner = THIS_MODULE,
134 .name = "debugfs",
135 .get_sb = debug_get_sb,
136 .kill_sb = kill_litter_super,
137};
138
139static int debugfs_create_by_name(const char *name, mode_t mode,
140 struct dentry *parent,
141 struct dentry **dentry)
142{
143 int error = 0;
144
145 /* If the parent is not specified, we create it in the root.
146 * We need the root dentry to do this, which is in the super
147 * block. A pointer to that is in the struct vfsmount that we
148 * have around.
149 */
Mathieu Desnoyersbafb2322006-11-24 13:46:30 -0500150 if (!parent) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 if (debugfs_mount && debugfs_mount->mnt_sb) {
152 parent = debugfs_mount->mnt_sb->s_root;
153 }
154 }
155 if (!parent) {
156 pr_debug("debugfs: Ah! can not find a parent!\n");
157 return -EFAULT;
158 }
159
160 *dentry = NULL;
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800161 mutex_lock(&parent->d_inode->i_mutex);
Christoph Hellwig5f45f1a2005-06-23 00:09:12 -0700162 *dentry = lookup_one_len(name, parent, strlen(name));
Akinobu Mita7bb03862006-10-19 12:24:42 +0900163 if (!IS_ERR(*dentry)) {
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100164 switch (mode & S_IFMT) {
165 case S_IFDIR:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 error = debugfs_mkdir(parent->d_inode, *dentry, mode);
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100167 break;
168 case S_IFLNK:
169 error = debugfs_link(parent->d_inode, *dentry, mode);
170 break;
171 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 error = debugfs_create(parent->d_inode, *dentry, mode);
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100173 break;
174 }
Mathieu Desnoyers65c33332006-11-24 13:50:09 -0500175 dput(*dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 } else
Akinobu Mita7bb03862006-10-19 12:24:42 +0900177 error = PTR_ERR(*dentry);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800178 mutex_unlock(&parent->d_inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 return error;
181}
182
183/**
184 * debugfs_create_file - create a file in the debugfs filesystem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 * @name: a pointer to a string containing the name of the file to create.
186 * @mode: the permission that the file should have
187 * @parent: a pointer to the parent dentry for this file. This should be a
188 * directory dentry if set. If this paramater is NULL, then the
189 * file will be created in the root of the debugfs filesystem.
190 * @data: a pointer to something that the caller will want to get to later
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700191 * on. The inode.i_private pointer will point to this value on
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 * the open() call.
193 * @fops: a pointer to a struct file_operations that should be used for
194 * this file.
195 *
196 * This is the basic "create a file" function for debugfs. It allows for a
197 * wide range of flexibility in createing a file, or a directory (if you
198 * want to create a directory, the debugfs_create_dir() function is
199 * recommended to be used instead.)
200 *
201 * This function will return a pointer to a dentry if it succeeds. This
202 * pointer must be passed to the debugfs_remove() function when the file is
203 * to be removed (no automatic cleanup happens if your module is unloaded,
Randy Dunlap6468b3a2006-07-20 08:16:42 -0700204 * you are responsible here.) If an error occurs, %NULL will be returned.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 *
Randy Dunlap6468b3a2006-07-20 08:16:42 -0700206 * If debugfs is not enabled in the kernel, the value -%ENODEV will be
Cornelia Huck873760f2007-02-14 07:57:47 +0100207 * returned.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 */
209struct dentry *debugfs_create_file(const char *name, mode_t mode,
210 struct dentry *parent, void *data,
Arjan van de Ven99ac48f2006-03-28 01:56:41 -0800211 const struct file_operations *fops)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
213 struct dentry *dentry = NULL;
214 int error;
215
216 pr_debug("debugfs: creating file '%s'\n",name);
217
Mathieu Desnoyers63223a02006-11-24 13:48:19 -0500218 error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
219 &debugfs_mount_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 if (error)
221 goto exit;
222
223 error = debugfs_create_by_name(name, mode, parent, &dentry);
224 if (error) {
225 dentry = NULL;
Mathieu Desnoyers63223a02006-11-24 13:48:19 -0500226 simple_release_fs(&debugfs_mount, &debugfs_mount_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 goto exit;
228 }
229
230 if (dentry->d_inode) {
231 if (data)
Theodore Ts'o8e18e292006-09-27 01:50:46 -0700232 dentry->d_inode->i_private = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 if (fops)
234 dentry->d_inode->i_fop = fops;
235 }
236exit:
237 return dentry;
238}
239EXPORT_SYMBOL_GPL(debugfs_create_file);
240
241/**
242 * debugfs_create_dir - create a directory in the debugfs filesystem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 * @name: a pointer to a string containing the name of the directory to
244 * create.
245 * @parent: a pointer to the parent dentry for this file. This should be a
246 * directory dentry if set. If this paramater is NULL, then the
247 * directory will be created in the root of the debugfs filesystem.
248 *
249 * This function creates a directory in debugfs with the given name.
250 *
251 * This function will return a pointer to a dentry if it succeeds. This
252 * pointer must be passed to the debugfs_remove() function when the file is
253 * to be removed (no automatic cleanup happens if your module is unloaded,
Randy Dunlap6468b3a2006-07-20 08:16:42 -0700254 * you are responsible here.) If an error occurs, %NULL will be returned.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 *
Randy Dunlap6468b3a2006-07-20 08:16:42 -0700256 * If debugfs is not enabled in the kernel, the value -%ENODEV will be
Cornelia Huck873760f2007-02-14 07:57:47 +0100257 * returned.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 */
259struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
260{
261 return debugfs_create_file(name,
262 S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
263 parent, NULL, NULL);
264}
265EXPORT_SYMBOL_GPL(debugfs_create_dir);
266
267/**
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100268 * debugfs_create_symlink- create a symbolic link in the debugfs filesystem
269 * @name: a pointer to a string containing the name of the symbolic link to
270 * create.
271 * @parent: a pointer to the parent dentry for this symbolic link. This
272 * should be a directory dentry if set. If this paramater is NULL,
273 * then the symbolic link will be created in the root of the debugfs
274 * filesystem.
275 * @target: a pointer to a string containing the path to the target of the
276 * symbolic link.
277 *
278 * This function creates a symbolic link with the given name in debugfs that
279 * links to the given target path.
280 *
281 * This function will return a pointer to a dentry if it succeeds. This
282 * pointer must be passed to the debugfs_remove() function when the symbolic
283 * link is to be removed (no automatic cleanup happens if your module is
284 * unloaded, you are responsible here.) If an error occurs, %NULL will be
285 * returned.
286 *
287 * If debugfs is not enabled in the kernel, the value -%ENODEV will be
Cornelia Huck873760f2007-02-14 07:57:47 +0100288 * returned.
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100289 */
290struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
291 const char *target)
292{
293 struct dentry *result;
294 char *link;
295
296 link = kstrdup(target, GFP_KERNEL);
297 if (!link)
298 return NULL;
299
300 result = debugfs_create_file(name, S_IFLNK | S_IRWXUGO, parent, link,
301 NULL);
302 if (!result)
303 kfree(link);
304 return result;
305}
306EXPORT_SYMBOL_GPL(debugfs_create_symlink);
307
Haavard Skinnemoen9505e632008-07-01 15:14:51 +0200308static void __debugfs_remove(struct dentry *dentry, struct dentry *parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
Mathieu Desnoyers65c33332006-11-24 13:50:09 -0500310 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 if (debugfs_positive(dentry)) {
313 if (dentry->d_inode) {
Mathieu Desnoyers29a7f3a2006-11-24 13:51:14 -0500314 dget(dentry);
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100315 switch (dentry->d_inode->i_mode & S_IFMT) {
316 case S_IFDIR:
Mathieu Desnoyers65c33332006-11-24 13:50:09 -0500317 ret = simple_rmdir(parent->d_inode, dentry);
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100318 break;
319 case S_IFLNK:
320 kfree(dentry->d_inode->i_private);
321 /* fall through */
322 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 simple_unlink(parent->d_inode, dentry);
Peter Oberparleiter66f54962007-02-13 12:13:54 +0100324 break;
325 }
Mathieu Desnoyers29a7f3a2006-11-24 13:51:14 -0500326 if (!ret)
327 d_delete(dentry);
328 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 }
330 }
Haavard Skinnemoen9505e632008-07-01 15:14:51 +0200331}
332
333/**
334 * debugfs_remove - removes a file or directory from the debugfs filesystem
335 * @dentry: a pointer to a the dentry of the file or directory to be
336 * removed.
337 *
338 * This function removes a file or directory in debugfs that was previously
339 * created with a call to another debugfs function (like
340 * debugfs_create_file() or variants thereof.)
341 *
342 * This function is required to be called in order for the file to be
343 * removed, no automatic cleanup of files will happen when a module is
344 * removed, you are responsible here.
345 */
346void debugfs_remove(struct dentry *dentry)
347{
348 struct dentry *parent;
349
350 if (!dentry)
351 return;
352
353 parent = dentry->d_parent;
354 if (!parent || !parent->d_inode)
355 return;
356
357 mutex_lock(&parent->d_inode->i_mutex);
358 __debugfs_remove(dentry, parent);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800359 mutex_unlock(&parent->d_inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 simple_release_fs(&debugfs_mount, &debugfs_mount_count);
361}
362EXPORT_SYMBOL_GPL(debugfs_remove);
363
Jan Karacfc94cd2007-05-09 13:19:52 +0200364/**
Haavard Skinnemoen9505e632008-07-01 15:14:51 +0200365 * debugfs_remove_recursive - recursively removes a directory
366 * @dentry: a pointer to a the dentry of the directory to be removed.
367 *
368 * This function recursively removes a directory tree in debugfs that
369 * was previously created with a call to another debugfs function
370 * (like debugfs_create_file() or variants thereof.)
371 *
372 * This function is required to be called in order for the file to be
373 * removed, no automatic cleanup of files will happen when a module is
374 * removed, you are responsible here.
375 */
376void debugfs_remove_recursive(struct dentry *dentry)
377{
378 struct dentry *child;
379 struct dentry *parent;
380
381 if (!dentry)
382 return;
383
384 parent = dentry->d_parent;
385 if (!parent || !parent->d_inode)
386 return;
387
388 parent = dentry;
389 mutex_lock(&parent->d_inode->i_mutex);
390
391 while (1) {
392 /*
393 * When all dentries under "parent" has been removed,
394 * walk up the tree until we reach our starting point.
395 */
396 if (list_empty(&parent->d_subdirs)) {
397 mutex_unlock(&parent->d_inode->i_mutex);
398 if (parent == dentry)
399 break;
400 parent = parent->d_parent;
401 mutex_lock(&parent->d_inode->i_mutex);
402 }
403 child = list_entry(parent->d_subdirs.next, struct dentry,
404 d_u.d_child);
405
406 /*
407 * If "child" isn't empty, walk down the tree and
408 * remove all its descendants first.
409 */
410 if (!list_empty(&child->d_subdirs)) {
411 mutex_unlock(&parent->d_inode->i_mutex);
412 parent = child;
413 mutex_lock(&parent->d_inode->i_mutex);
414 continue;
415 }
416 __debugfs_remove(child, parent);
417 if (parent->d_subdirs.next == &child->d_u.d_child) {
418 /*
419 * Avoid infinite loop if we fail to remove
420 * one dentry.
421 */
422 mutex_unlock(&parent->d_inode->i_mutex);
423 break;
424 }
425 simple_release_fs(&debugfs_mount, &debugfs_mount_count);
426 }
427
428 parent = dentry->d_parent;
429 mutex_lock(&parent->d_inode->i_mutex);
430 __debugfs_remove(dentry, parent);
431 mutex_unlock(&parent->d_inode->i_mutex);
432 simple_release_fs(&debugfs_mount, &debugfs_mount_count);
433}
434EXPORT_SYMBOL_GPL(debugfs_remove_recursive);
435
436/**
Jan Karacfc94cd2007-05-09 13:19:52 +0200437 * debugfs_rename - rename a file/directory in the debugfs filesystem
438 * @old_dir: a pointer to the parent dentry for the renamed object. This
439 * should be a directory dentry.
440 * @old_dentry: dentry of an object to be renamed.
441 * @new_dir: a pointer to the parent dentry where the object should be
442 * moved. This should be a directory dentry.
443 * @new_name: a pointer to a string containing the target name.
444 *
445 * This function renames a file/directory in debugfs. The target must not
446 * exist for rename to succeed.
447 *
448 * This function will return a pointer to old_dentry (which is updated to
449 * reflect renaming) if it succeeds. If an error occurs, %NULL will be
450 * returned.
451 *
452 * If debugfs is not enabled in the kernel, the value -%ENODEV will be
453 * returned.
454 */
455struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
456 struct dentry *new_dir, const char *new_name)
457{
458 int error;
459 struct dentry *dentry = NULL, *trap;
460 const char *old_name;
461
462 trap = lock_rename(new_dir, old_dir);
463 /* Source or destination directories don't exist? */
464 if (!old_dir->d_inode || !new_dir->d_inode)
465 goto exit;
466 /* Source does not exist, cyclic rename, or mountpoint? */
467 if (!old_dentry->d_inode || old_dentry == trap ||
468 d_mountpoint(old_dentry))
469 goto exit;
470 dentry = lookup_one_len(new_name, new_dir, strlen(new_name));
471 /* Lookup failed, cyclic rename or target exists? */
472 if (IS_ERR(dentry) || dentry == trap || dentry->d_inode)
473 goto exit;
474
475 old_name = fsnotify_oldname_init(old_dentry->d_name.name);
476
477 error = simple_rename(old_dir->d_inode, old_dentry, new_dir->d_inode,
478 dentry);
479 if (error) {
480 fsnotify_oldname_free(old_name);
481 goto exit;
482 }
483 d_move(old_dentry, dentry);
484 fsnotify_move(old_dir->d_inode, new_dir->d_inode, old_name,
485 old_dentry->d_name.name, S_ISDIR(old_dentry->d_inode->i_mode),
Al Viro5a190ae2007-06-07 12:19:32 -0400486 NULL, old_dentry);
Jan Karacfc94cd2007-05-09 13:19:52 +0200487 fsnotify_oldname_free(old_name);
488 unlock_rename(new_dir, old_dir);
489 dput(dentry);
490 return old_dentry;
491exit:
492 if (dentry && !IS_ERR(dentry))
493 dput(dentry);
494 unlock_rename(new_dir, old_dir);
495 return NULL;
496}
497EXPORT_SYMBOL_GPL(debugfs_rename);
498
Greg Kroah-Hartman191e1862007-10-29 20:13:17 +0100499static struct kobject *debug_kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
501static int __init debugfs_init(void)
502{
503 int retval;
504
Greg Kroah-Hartman0ff21e42007-11-06 10:36:58 -0800505 debug_kobj = kobject_create_and_add("debug", kernel_kobj);
Greg Kroah-Hartman191e1862007-10-29 20:13:17 +0100506 if (!debug_kobj)
507 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 retval = register_filesystem(&debug_fs_type);
510 if (retval)
Greg Kroah-Hartman197b12d2007-12-20 08:13:05 -0800511 kobject_put(debug_kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 return retval;
513}
514
515static void __exit debugfs_exit(void)
516{
517 simple_release_fs(&debugfs_mount, &debugfs_mount_count);
518 unregister_filesystem(&debug_fs_type);
Greg Kroah-Hartman197b12d2007-12-20 08:13:05 -0800519 kobject_put(debug_kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520}
521
522core_initcall(debugfs_init);
523module_exit(debugfs_exit);
524MODULE_LICENSE("GPL");
525