2 * debugfs.h - a tiny little debug file system
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>
24 struct file_operations;
26 struct debugfs_blob_wrapper {
31 struct debugfs_reg32 {
36 struct debugfs_regset32 {
37 const struct debugfs_reg32 *regs;
42 extern struct dentry *arch_debugfs_dir;
44 #if defined(CONFIG_DEBUG_FS)
46 /* declared over in file.c */
47 extern const struct file_operations debugfs_file_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_file_size(const char *name, umode_t mode,
54 struct dentry *parent, void *data,
55 const struct file_operations *fops,
58 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
60 struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
63 struct dentry *debugfs_create_automount(const char *name,
64 struct dentry *parent,
65 struct vfsmount *(*f)(void *),
68 void debugfs_remove(struct dentry *dentry);
69 void debugfs_remove_recursive(struct dentry *dentry);
71 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
72 struct dentry *new_dir, const char *new_name);
74 struct dentry *debugfs_create_u8(const char *name, umode_t mode,
75 struct dentry *parent, u8 *value);
76 struct dentry *debugfs_create_u16(const char *name, umode_t mode,
77 struct dentry *parent, u16 *value);
78 struct dentry *debugfs_create_u32(const char *name, umode_t mode,
79 struct dentry *parent, u32 *value);
80 struct dentry *debugfs_create_u64(const char *name, umode_t mode,
81 struct dentry *parent, u64 *value);
82 struct dentry *debugfs_create_x8(const char *name, umode_t mode,
83 struct dentry *parent, u8 *value);
84 struct dentry *debugfs_create_x16(const char *name, umode_t mode,
85 struct dentry *parent, u16 *value);
86 struct dentry *debugfs_create_x32(const char *name, umode_t mode,
87 struct dentry *parent, u32 *value);
88 struct dentry *debugfs_create_x64(const char *name, umode_t mode,
89 struct dentry *parent, u64 *value);
90 struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
91 struct dentry *parent, size_t *value);
92 struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
93 struct dentry *parent, atomic_t *value);
94 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
95 struct dentry *parent, u32 *value);
97 struct dentry *debugfs_create_blob(const char *name, umode_t mode,
98 struct dentry *parent,
99 struct debugfs_blob_wrapper *blob);
101 struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
102 struct dentry *parent,
103 struct debugfs_regset32 *regset);
105 void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
106 int nregs, void __iomem *base, char *prefix);
108 struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
109 struct dentry *parent,
110 u32 *array, u32 elements);
112 struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
113 struct dentry *parent,
114 int (*read_fn)(struct seq_file *s,
117 bool debugfs_initialized(void);
119 ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf,
120 size_t count, loff_t *ppos);
122 ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
123 size_t count, loff_t *ppos);
127 #include <linux/err.h>
130 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
131 * so users have a chance to detect if there was a real error or not. We don't
132 * want to duplicate the design decision mistakes of procfs and devfs again.
135 static inline struct dentry *debugfs_create_file(const char *name, umode_t mode,
136 struct dentry *parent, void *data,
137 const struct file_operations *fops)
139 return ERR_PTR(-ENODEV);
142 static inline struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
143 struct dentry *parent, void *data,
144 const struct file_operations *fops,
147 return ERR_PTR(-ENODEV);
150 static inline struct dentry *debugfs_create_dir(const char *name,
151 struct dentry *parent)
153 return ERR_PTR(-ENODEV);
156 static inline struct dentry *debugfs_create_symlink(const char *name,
157 struct dentry *parent,
160 return ERR_PTR(-ENODEV);
163 static inline void debugfs_remove(struct dentry *dentry)
166 static inline void debugfs_remove_recursive(struct dentry *dentry)
169 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
170 struct dentry *new_dir, char *new_name)
172 return ERR_PTR(-ENODEV);
175 static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
176 struct dentry *parent,
179 return ERR_PTR(-ENODEV);
182 static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
183 struct dentry *parent,
186 return ERR_PTR(-ENODEV);
189 static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
190 struct dentry *parent,
193 return ERR_PTR(-ENODEV);
196 static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
197 struct dentry *parent,
200 return ERR_PTR(-ENODEV);
203 static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
204 struct dentry *parent,
207 return ERR_PTR(-ENODEV);
210 static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
211 struct dentry *parent,
214 return ERR_PTR(-ENODEV);
217 static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
218 struct dentry *parent,
221 return ERR_PTR(-ENODEV);
224 static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode,
225 struct dentry *parent,
228 return ERR_PTR(-ENODEV);
231 static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
232 struct dentry *parent,
235 return ERR_PTR(-ENODEV);
238 static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
239 struct dentry *parent, atomic_t *value)
241 return ERR_PTR(-ENODEV);
244 static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
245 struct dentry *parent,
248 return ERR_PTR(-ENODEV);
251 static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
252 struct dentry *parent,
253 struct debugfs_blob_wrapper *blob)
255 return ERR_PTR(-ENODEV);
258 static inline struct dentry *debugfs_create_regset32(const char *name,
259 umode_t mode, struct dentry *parent,
260 struct debugfs_regset32 *regset)
262 return ERR_PTR(-ENODEV);
265 static inline void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
266 int nregs, void __iomem *base, char *prefix)
270 static inline bool debugfs_initialized(void)
275 static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
276 struct dentry *parent,
277 u32 *array, u32 elements)
279 return ERR_PTR(-ENODEV);
282 static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,
284 struct dentry *parent,
285 int (*read_fn)(struct seq_file *s,
288 return ERR_PTR(-ENODEV);
291 static inline ssize_t debugfs_read_file_bool(struct file *file,
292 char __user *user_buf,
293 size_t count, loff_t *ppos)
298 static inline ssize_t debugfs_write_file_bool(struct file *file,
299 const char __user *user_buf,
300 size_t count, loff_t *ppos)