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);
47 void debugfs_remove_recursive(struct dentry *dentry);
49 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
50 struct dentry *new_dir, const char *new_name);
52 struct dentry *debugfs_create_u8(const char *name, mode_t mode,
53 struct dentry *parent, u8 *value);
54 struct dentry *debugfs_create_u16(const char *name, mode_t mode,
55 struct dentry *parent, u16 *value);
56 struct dentry *debugfs_create_u32(const char *name, mode_t mode,
57 struct dentry *parent, u32 *value);
58 struct dentry *debugfs_create_u64(const char *name, mode_t mode,
59 struct dentry *parent, u64 *value);
60 struct dentry *debugfs_create_x8(const char *name, mode_t mode,
61 struct dentry *parent, u8 *value);
62 struct dentry *debugfs_create_x16(const char *name, mode_t mode,
63 struct dentry *parent, u16 *value);
64 struct dentry *debugfs_create_x32(const char *name, mode_t mode,
65 struct dentry *parent, u32 *value);
66 struct dentry *debugfs_create_size_t(const char *name, mode_t mode,
67 struct dentry *parent, size_t *value);
68 struct dentry *debugfs_create_bool(const char *name, mode_t mode,
69 struct dentry *parent, u32 *value);
71 struct dentry *debugfs_create_blob(const char *name, mode_t mode,
72 struct dentry *parent,
73 struct debugfs_blob_wrapper *blob);
76 #include <linux/err.h>
79 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
80 * so users have a chance to detect if there was a real error or not. We don't
81 * want to duplicate the design decision mistakes of procfs and devfs again.
84 static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
85 struct dentry *parent, void *data,
86 const struct file_operations *fops)
88 return ERR_PTR(-ENODEV);
91 static inline struct dentry *debugfs_create_dir(const char *name,
92 struct dentry *parent)
94 return ERR_PTR(-ENODEV);
97 static inline struct dentry *debugfs_create_symlink(const char *name,
98 struct dentry *parent,
101 return ERR_PTR(-ENODEV);
104 static inline void debugfs_remove(struct dentry *dentry)
107 static inline void debugfs_remove_recursive(struct dentry *dentry)
110 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
111 struct dentry *new_dir, char *new_name)
113 return ERR_PTR(-ENODEV);
116 static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
117 struct dentry *parent,
120 return ERR_PTR(-ENODEV);
123 static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
124 struct dentry *parent,
127 return ERR_PTR(-ENODEV);
130 static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
131 struct dentry *parent,
134 return ERR_PTR(-ENODEV);
137 static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
138 struct dentry *parent,
141 return ERR_PTR(-ENODEV);
144 static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode,
145 struct dentry *parent,
148 return ERR_PTR(-ENODEV);
151 static inline struct dentry *debugfs_create_x16(const char *name, mode_t mode,
152 struct dentry *parent,
155 return ERR_PTR(-ENODEV);
158 static inline struct dentry *debugfs_create_x32(const char *name, mode_t mode,
159 struct dentry *parent,
162 return ERR_PTR(-ENODEV);
165 static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
166 struct dentry *parent,
169 return ERR_PTR(-ENODEV);
172 static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
173 struct dentry *parent,
174 struct debugfs_blob_wrapper *blob)
176 return ERR_PTR(-ENODEV);