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.
19 #include <linux/seq_file.h>
21 #include <linux/types.h>
23 struct file_operations;
25 struct debugfs_blob_wrapper {
30 struct debugfs_reg32 {
35 struct debugfs_regset32 {
36 struct debugfs_reg32 *regs;
41 extern struct dentry *arch_debugfs_dir;
43 #if defined(CONFIG_DEBUG_FS)
45 /* declared over in file.c */
46 extern const struct file_operations debugfs_file_operations;
47 extern const struct inode_operations debugfs_link_operations;
49 struct dentry *debugfs_create_file(const char *name, umode_t mode,
50 struct dentry *parent, void *data,
51 const struct file_operations *fops);
53 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
55 struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
58 void debugfs_remove(struct dentry *dentry);
59 void debugfs_remove_recursive(struct dentry *dentry);
61 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
62 struct dentry *new_dir, const char *new_name);
64 struct dentry *debugfs_create_u8(const char *name, umode_t mode,
65 struct dentry *parent, u8 *value);
66 struct dentry *debugfs_create_u16(const char *name, umode_t mode,
67 struct dentry *parent, u16 *value);
68 struct dentry *debugfs_create_u32(const char *name, umode_t mode,
69 struct dentry *parent, u32 *value);
70 struct dentry *debugfs_create_u64(const char *name, umode_t mode,
71 struct dentry *parent, u64 *value);
72 struct dentry *debugfs_create_x8(const char *name, umode_t mode,
73 struct dentry *parent, u8 *value);
74 struct dentry *debugfs_create_x16(const char *name, umode_t mode,
75 struct dentry *parent, u16 *value);
76 struct dentry *debugfs_create_x32(const char *name, umode_t mode,
77 struct dentry *parent, u32 *value);
78 struct dentry *debugfs_create_x64(const char *name, umode_t mode,
79 struct dentry *parent, u64 *value);
80 struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
81 struct dentry *parent, size_t *value);
82 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
83 struct dentry *parent, u32 *value);
85 struct dentry *debugfs_create_blob(const char *name, umode_t mode,
86 struct dentry *parent,
87 struct debugfs_blob_wrapper *blob);
89 struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
90 struct dentry *parent,
91 struct debugfs_regset32 *regset);
93 int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
94 int nregs, void __iomem *base, char *prefix);
96 struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
97 struct dentry *parent,
98 u32 *array, u32 elements);
100 bool debugfs_initialized(void);
104 #include <linux/err.h>
107 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
108 * so users have a chance to detect if there was a real error or not. We don't
109 * want to duplicate the design decision mistakes of procfs and devfs again.
112 static inline struct dentry *debugfs_create_file(const char *name, umode_t mode,
113 struct dentry *parent, void *data,
114 const struct file_operations *fops)
116 return ERR_PTR(-ENODEV);
119 static inline struct dentry *debugfs_create_dir(const char *name,
120 struct dentry *parent)
122 return ERR_PTR(-ENODEV);
125 static inline struct dentry *debugfs_create_symlink(const char *name,
126 struct dentry *parent,
129 return ERR_PTR(-ENODEV);
132 static inline void debugfs_remove(struct dentry *dentry)
135 static inline void debugfs_remove_recursive(struct dentry *dentry)
138 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
139 struct dentry *new_dir, char *new_name)
141 return ERR_PTR(-ENODEV);
144 static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
145 struct dentry *parent,
148 return ERR_PTR(-ENODEV);
151 static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
152 struct dentry *parent,
155 return ERR_PTR(-ENODEV);
158 static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
159 struct dentry *parent,
162 return ERR_PTR(-ENODEV);
165 static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
166 struct dentry *parent,
169 return ERR_PTR(-ENODEV);
172 static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
173 struct dentry *parent,
176 return ERR_PTR(-ENODEV);
179 static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
180 struct dentry *parent,
183 return ERR_PTR(-ENODEV);
186 static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
187 struct dentry *parent,
190 return ERR_PTR(-ENODEV);
193 static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
194 struct dentry *parent,
197 return ERR_PTR(-ENODEV);
200 static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
201 struct dentry *parent,
204 return ERR_PTR(-ENODEV);
207 static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
208 struct dentry *parent,
209 struct debugfs_blob_wrapper *blob)
211 return ERR_PTR(-ENODEV);
214 static inline struct dentry *debugfs_create_regset32(const char *name,
215 umode_t mode, struct dentry *parent,
216 struct debugfs_regset32 *regset)
218 return ERR_PTR(-ENODEV);
221 static inline bool debugfs_initialized(void)
226 static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
227 struct dentry *parent,
228 u32 *array, u32 elements)
230 return ERR_PTR(-ENODEV);