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_rename(struct dentry *old_dir, struct dentry *old_dentry,
42 struct dentry *new_dir, const char *new_name);
44 struct dentry *debugfs_create_u8(const char *name, mode_t mode,
45 struct dentry *parent, u8 *value);
46 struct dentry *debugfs_create_u16(const char *name, mode_t mode,
47 struct dentry *parent, u16 *value);
48 struct dentry *debugfs_create_u32(const char *name, mode_t mode,
49 struct dentry *parent, u32 *value);
50 struct dentry *debugfs_create_u64(const char *name, mode_t mode,
51 struct dentry *parent, u64 *value);
52 struct dentry *debugfs_create_bool(const char *name, mode_t mode,
53 struct dentry *parent, u32 *value);
55 struct dentry *debugfs_create_blob(const char *name, mode_t mode,
56 struct dentry *parent,
57 struct debugfs_blob_wrapper *blob);
60 #include <linux/err.h>
63 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
64 * so users have a chance to detect if there was a real error or not. We don't
65 * want to duplicate the design decision mistakes of procfs and devfs again.
68 static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
69 struct dentry *parent, void *data,
70 const struct file_operations *fops)
72 return ERR_PTR(-ENODEV);
75 static inline struct dentry *debugfs_create_dir(const char *name,
76 struct dentry *parent)
78 return ERR_PTR(-ENODEV);
81 static inline struct dentry *debugfs_create_symlink(const char *name,
82 struct dentry *parent,
85 return ERR_PTR(-ENODEV);
88 static inline void debugfs_remove(struct dentry *dentry)
91 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
92 struct dentry *new_dir, char *new_name)
94 return ERR_PTR(-ENODEV);
97 static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
98 struct dentry *parent,
101 return ERR_PTR(-ENODEV);
104 static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
105 struct dentry *parent,
108 return ERR_PTR(-ENODEV);
111 static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
112 struct dentry *parent,
115 return ERR_PTR(-ENODEV);
118 static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
119 struct dentry *parent,
122 return ERR_PTR(-ENODEV);
125 static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
126 struct dentry *parent,
129 return ERR_PTR(-ENODEV);
132 static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
133 struct dentry *parent,
134 struct debugfs_blob_wrapper *blob)
136 return ERR_PTR(-ENODEV);