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/filesystems 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_x64(const char *name, mode_t mode,
67 struct dentry *parent, u64 *value);
68 struct dentry *debugfs_create_size_t(const char *name, mode_t mode,
69 struct dentry *parent, size_t *value);
70 struct dentry *debugfs_create_bool(const char *name, mode_t mode,
71 struct dentry *parent, u32 *value);
73 struct dentry *debugfs_create_blob(const char *name, mode_t mode,
74 struct dentry *parent,
75 struct debugfs_blob_wrapper *blob);
77 bool debugfs_initialized(void);
81 #include <linux/err.h>
84 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
85 * so users have a chance to detect if there was a real error or not. We don't
86 * want to duplicate the design decision mistakes of procfs and devfs again.
89 static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
90 struct dentry *parent, void *data,
91 const struct file_operations *fops)
93 return ERR_PTR(-ENODEV);
96 static inline struct dentry *debugfs_create_dir(const char *name,
97 struct dentry *parent)
99 return ERR_PTR(-ENODEV);
102 static inline struct dentry *debugfs_create_symlink(const char *name,
103 struct dentry *parent,
106 return ERR_PTR(-ENODEV);
109 static inline void debugfs_remove(struct dentry *dentry)
112 static inline void debugfs_remove_recursive(struct dentry *dentry)
115 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
116 struct dentry *new_dir, char *new_name)
118 return ERR_PTR(-ENODEV);
121 static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
122 struct dentry *parent,
125 return ERR_PTR(-ENODEV);
128 static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
129 struct dentry *parent,
132 return ERR_PTR(-ENODEV);
135 static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
136 struct dentry *parent,
139 return ERR_PTR(-ENODEV);
142 static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
143 struct dentry *parent,
146 return ERR_PTR(-ENODEV);
149 static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode,
150 struct dentry *parent,
153 return ERR_PTR(-ENODEV);
156 static inline struct dentry *debugfs_create_x16(const char *name, mode_t mode,
157 struct dentry *parent,
160 return ERR_PTR(-ENODEV);
163 static inline struct dentry *debugfs_create_x32(const char *name, mode_t mode,
164 struct dentry *parent,
167 return ERR_PTR(-ENODEV);
170 static inline struct dentry *debugfs_create_size_t(const char *name, mode_t mode,
171 struct dentry *parent,
174 return ERR_PTR(-ENODEV);
177 static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
178 struct dentry *parent,
181 return ERR_PTR(-ENODEV);
184 static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
185 struct dentry *parent,
186 struct debugfs_blob_wrapper *blob)
188 return ERR_PTR(-ENODEV);
191 static inline bool debugfs_initialized(void)