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 extern struct dentry *arch_debugfs_dir;
31 #if defined(CONFIG_DEBUG_FS)
33 /* declared over in file.c */
34 extern const struct file_operations debugfs_file_operations;
35 extern const struct inode_operations debugfs_link_operations;
37 struct dentry *debugfs_create_file(const char *name, mode_t mode,
38 struct dentry *parent, void *data,
39 const struct file_operations *fops);
41 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
43 struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
46 void debugfs_remove(struct dentry *dentry);
48 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
49 struct dentry *new_dir, const char *new_name);
51 struct dentry *debugfs_create_u8(const char *name, mode_t mode,
52 struct dentry *parent, u8 *value);
53 struct dentry *debugfs_create_u16(const char *name, mode_t mode,
54 struct dentry *parent, u16 *value);
55 struct dentry *debugfs_create_u32(const char *name, mode_t mode,
56 struct dentry *parent, u32 *value);
57 struct dentry *debugfs_create_u64(const char *name, mode_t mode,
58 struct dentry *parent, u64 *value);
59 struct dentry *debugfs_create_x8(const char *name, mode_t mode,
60 struct dentry *parent, u8 *value);
61 struct dentry *debugfs_create_x16(const char *name, mode_t mode,
62 struct dentry *parent, u16 *value);
63 struct dentry *debugfs_create_x32(const char *name, mode_t mode,
64 struct dentry *parent, u32 *value);
65 struct dentry *debugfs_create_bool(const char *name, mode_t mode,
66 struct dentry *parent, u32 *value);
68 struct dentry *debugfs_create_blob(const char *name, mode_t mode,
69 struct dentry *parent,
70 struct debugfs_blob_wrapper *blob);
73 #include <linux/err.h>
76 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
77 * so users have a chance to detect if there was a real error or not. We don't
78 * want to duplicate the design decision mistakes of procfs and devfs again.
81 static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
82 struct dentry *parent, void *data,
83 const struct file_operations *fops)
85 return ERR_PTR(-ENODEV);
88 static inline struct dentry *debugfs_create_dir(const char *name,
89 struct dentry *parent)
91 return ERR_PTR(-ENODEV);
94 static inline struct dentry *debugfs_create_symlink(const char *name,
95 struct dentry *parent,
98 return ERR_PTR(-ENODEV);
101 static inline void debugfs_remove(struct dentry *dentry)
104 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
105 struct dentry *new_dir, char *new_name)
107 return ERR_PTR(-ENODEV);
110 static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
111 struct dentry *parent,
114 return ERR_PTR(-ENODEV);
117 static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
118 struct dentry *parent,
121 return ERR_PTR(-ENODEV);
124 static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
125 struct dentry *parent,
128 return ERR_PTR(-ENODEV);
131 static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
132 struct dentry *parent,
135 return ERR_PTR(-ENODEV);
138 static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode,
139 struct dentry *parent,
142 return ERR_PTR(-ENODEV);
145 static inline struct dentry *debugfs_create_x16(const char *name, mode_t mode,
146 struct dentry *parent,
149 return ERR_PTR(-ENODEV);
152 static inline struct dentry *debugfs_create_x32(const char *name, mode_t mode,
153 struct dentry *parent,
156 return ERR_PTR(-ENODEV);
159 static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
160 struct dentry *parent,
163 return ERR_PTR(-ENODEV);
166 static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
167 struct dentry *parent,
168 struct debugfs_blob_wrapper *blob)
170 return ERR_PTR(-ENODEV);