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 const 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_atomic_t(const char *name, umode_t mode,
83 struct dentry *parent, atomic_t *value);
84 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
85 struct dentry *parent, u32 *value);
87 struct dentry *debugfs_create_blob(const char *name, umode_t mode,
88 struct dentry *parent,
89 struct debugfs_blob_wrapper *blob);
91 struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
92 struct dentry *parent,
93 struct debugfs_regset32 *regset);
95 int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
96 int nregs, void __iomem *base, char *prefix);
98 struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
99 struct dentry *parent,
100 u32 *array, u32 elements);
102 bool debugfs_initialized(void);
106 #include <linux/err.h>
109 * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
110 * so users have a chance to detect if there was a real error or not. We don't
111 * want to duplicate the design decision mistakes of procfs and devfs again.
114 static inline struct dentry *debugfs_create_file(const char *name, umode_t mode,
115 struct dentry *parent, void *data,
116 const struct file_operations *fops)
118 return ERR_PTR(-ENODEV);
121 static inline struct dentry *debugfs_create_dir(const char *name,
122 struct dentry *parent)
124 return ERR_PTR(-ENODEV);
127 static inline struct dentry *debugfs_create_symlink(const char *name,
128 struct dentry *parent,
131 return ERR_PTR(-ENODEV);
134 static inline void debugfs_remove(struct dentry *dentry)
137 static inline void debugfs_remove_recursive(struct dentry *dentry)
140 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
141 struct dentry *new_dir, char *new_name)
143 return ERR_PTR(-ENODEV);
146 static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
147 struct dentry *parent,
150 return ERR_PTR(-ENODEV);
153 static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
154 struct dentry *parent,
157 return ERR_PTR(-ENODEV);
160 static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
161 struct dentry *parent,
164 return ERR_PTR(-ENODEV);
167 static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
168 struct dentry *parent,
171 return ERR_PTR(-ENODEV);
174 static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
175 struct dentry *parent,
178 return ERR_PTR(-ENODEV);
181 static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
182 struct dentry *parent,
185 return ERR_PTR(-ENODEV);
188 static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
189 struct dentry *parent,
192 return ERR_PTR(-ENODEV);
195 static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode,
196 struct dentry *parent,
199 return ERR_PTR(-ENODEV);
202 static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
203 struct dentry *parent,
206 return ERR_PTR(-ENODEV);
209 static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
210 struct dentry *parent, atomic_t *value)
212 return ERR_PTR(-ENODEV);
215 static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
216 struct dentry *parent,
219 return ERR_PTR(-ENODEV);
222 static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
223 struct dentry *parent,
224 struct debugfs_blob_wrapper *blob)
226 return ERR_PTR(-ENODEV);
229 static inline struct dentry *debugfs_create_regset32(const char *name,
230 umode_t mode, struct dentry *parent,
231 struct debugfs_regset32 *regset)
233 return ERR_PTR(-ENODEV);
236 static inline int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
237 int nregs, void __iomem *base, char *prefix)
242 static inline bool debugfs_initialized(void)
247 static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
248 struct dentry *parent,
249 u32 *array, u32 elements)
251 return ERR_PTR(-ENODEV);