2 * debugfs.h - a tiny little debug file system
4 * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004 IBM Inc.
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.
11 * debugfs is for people to use instead of /proc or /sys.
12 * See Documentation/DocBook/kernel-api for more details.
20 #include <linux/types.h>
22 struct file_operations;
24 struct debugfs_blob_wrapper {
29 #if defined(CONFIG_DEBUG_FS)
30 struct dentry *debugfs_create_file(const char *name, mode_t mode,
31 struct dentry *parent, void *data,
32 const struct file_operations *fops);
34 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
36 struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
39 void debugfs_remove(struct dentry *dentry);
41 struct dentry *debugfs_create_u8(const char *name, mode_t mode,
42 struct dentry *parent, u8 *value);
43 struct dentry *debugfs_create_u16(const char *name, mode_t mode,
44 struct dentry *parent, u16 *value);
45 struct dentry *debugfs_create_u32(const char *name, mode_t mode,
46 struct dentry *parent, u32 *value);
47 struct dentry *debugfs_create_bool(const char *name, mode_t mode,
48 struct dentry *parent, u32 *value);
50 struct dentry *debugfs_create_blob(const char *name, mode_t mode,
51 struct dentry *parent,
52 struct debugfs_blob_wrapper *blob);
55 #include <linux/err.h>
58 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
59 * so users have a chance to detect if there was a real error or not. We don't
60 * want to duplicate the design decision mistakes of procfs and devfs again.
63 static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
64 struct dentry *parent, void *data,
65 const struct file_operations *fops)
67 return ERR_PTR(-ENODEV);
70 static inline struct dentry *debugfs_create_dir(const char *name,
71 struct dentry *parent)
73 return ERR_PTR(-ENODEV);
76 static inline struct dentry *debugfs_create_symlink(const char *name,
77 struct dentry *parent,
80 return ERR_PTR(-ENODEV);
83 static inline void debugfs_remove(struct dentry *dentry)
86 static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
87 struct dentry *parent,
90 return ERR_PTR(-ENODEV);
93 static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
94 struct dentry *parent,
97 return ERR_PTR(-ENODEV);
100 static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
101 struct dentry *parent,
104 return ERR_PTR(-ENODEV);
107 static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
108 struct dentry *parent,
111 return ERR_PTR(-ENODEV);
114 static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
115 struct dentry *parent,
116 struct debugfs_blob_wrapper *blob)
118 return ERR_PTR(-ENODEV);