1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
4 #include <linux/config.h>
5 #include <linux/slab.h>
7 #include <linux/spinlock.h>
8 #include <asm/atomic.h>
11 * The proc filesystem constants/structures
15 * Offset of the first process in the /proc root directory..
17 #define FIRST_PROCESS_ENTRY 256
21 * We always define these enumerators
28 #define PROC_SUPER_MAGIC 0x9fa0
31 * This is not completely implemented yet. The idea is to
32 * create an in-memory tree (like the actual /proc filesystem
33 * tree) of these proc_dir_entries, so that we can dynamically
34 * add new files to /proc.
36 * The "next" pointer creates a linked list of one /proc directory,
37 * while parent/subdir create the directory structure (every
38 * /proc file has a parent, but "subdir" is NULL for all
39 * non-directory entries).
41 * "get_info" is called at "read", while "owner" is used to protect module
42 * from unloading while proc_dir_entry is in use
45 typedef int (read_proc_t
)(char *page
, char **start
, off_t off
,
46 int count
, int *eof
, void *data
);
47 typedef int (write_proc_t
)(struct file
*file
, const char __user
*buffer
,
48 unsigned long count
, void *data
);
49 typedef int (get_info_t
)(char *, char **, off_t
, int);
51 struct proc_dir_entry
{
53 unsigned short namelen
;
60 struct inode_operations
* proc_iops
;
61 const struct file_operations
* proc_fops
;
64 struct proc_dir_entry
*next
, *parent
, *subdir
;
66 read_proc_t
*read_proc
;
67 write_proc_t
*write_proc
;
68 atomic_t count
; /* use count */
69 int deleted
; /* delete flag */
74 struct kcore_list
*next
;
80 struct list_head list
;
81 unsigned long long paddr
;
88 extern struct proc_dir_entry proc_root
;
89 extern struct proc_dir_entry
*proc_root_fs
;
90 extern struct proc_dir_entry
*proc_net
;
91 extern struct proc_dir_entry
*proc_net_stat
;
92 extern struct proc_dir_entry
*proc_bus
;
93 extern struct proc_dir_entry
*proc_root_driver
;
94 extern struct proc_dir_entry
*proc_root_kcore
;
96 extern spinlock_t proc_subdir_lock
;
98 extern void proc_root_init(void);
99 extern void proc_misc_init(void);
103 struct dentry
*proc_pid_lookup(struct inode
*dir
, struct dentry
* dentry
, struct nameidata
*);
104 struct dentry
*proc_pid_unhash(struct task_struct
*p
);
105 void proc_pid_flush(struct dentry
*proc_dentry
);
106 int proc_pid_readdir(struct file
* filp
, void * dirent
, filldir_t filldir
);
107 unsigned long task_vsize(struct mm_struct
*);
108 int task_statm(struct mm_struct
*, int *, int *, int *, int *);
109 char *task_mem(struct mm_struct
*, char *);
111 extern struct proc_dir_entry
*create_proc_entry(const char *name
, mode_t mode
,
112 struct proc_dir_entry
*parent
);
113 extern void remove_proc_entry(const char *name
, struct proc_dir_entry
*parent
);
115 extern struct vfsmount
*proc_mnt
;
116 extern int proc_fill_super(struct super_block
*,void *,int);
117 extern struct inode
*proc_get_inode(struct super_block
*, unsigned int, struct proc_dir_entry
*);
119 extern int proc_match(int, const char *,struct proc_dir_entry
*);
122 * These are generic /proc routines that use the internal
123 * "struct proc_dir_entry" tree to traverse the filesystem.
125 * The /proc root directory has extended versions to take care
126 * of the /proc/<pid> subdirectories.
128 extern int proc_readdir(struct file
*, void *, filldir_t
);
129 extern struct dentry
*proc_lookup(struct inode
*, struct dentry
*, struct nameidata
*);
131 extern const struct file_operations proc_kcore_operations
;
132 extern const struct file_operations proc_kmsg_operations
;
133 extern const struct file_operations ppc_htab_operations
;
139 extern void proc_tty_init(void);
140 extern void proc_tty_register_driver(struct tty_driver
*driver
);
141 extern void proc_tty_unregister_driver(struct tty_driver
*driver
);
146 #ifdef CONFIG_PROC_DEVICETREE
149 extern void proc_device_tree_init(void);
150 extern void proc_device_tree_add_node(struct device_node
*, struct proc_dir_entry
*);
151 extern void proc_device_tree_add_prop(struct proc_dir_entry
*pde
, struct property
*prop
);
152 extern void proc_device_tree_remove_prop(struct proc_dir_entry
*pde
,
153 struct property
*prop
);
154 extern void proc_device_tree_update_prop(struct proc_dir_entry
*pde
,
155 struct property
*newprop
,
156 struct property
*oldprop
);
157 #endif /* CONFIG_PROC_DEVICETREE */
159 extern struct proc_dir_entry
*proc_symlink(const char *,
160 struct proc_dir_entry
*, const char *);
161 extern struct proc_dir_entry
*proc_mkdir(const char *,struct proc_dir_entry
*);
162 extern struct proc_dir_entry
*proc_mkdir_mode(const char *name
, mode_t mode
,
163 struct proc_dir_entry
*parent
);
165 static inline struct proc_dir_entry
*create_proc_read_entry(const char *name
,
166 mode_t mode
, struct proc_dir_entry
*base
,
167 read_proc_t
*read_proc
, void * data
)
169 struct proc_dir_entry
*res
=create_proc_entry(name
,mode
,base
);
171 res
->read_proc
=read_proc
;
177 static inline struct proc_dir_entry
*create_proc_info_entry(const char *name
,
178 mode_t mode
, struct proc_dir_entry
*base
, get_info_t
*get_info
)
180 struct proc_dir_entry
*res
=create_proc_entry(name
,mode
,base
);
181 if (res
) res
->get_info
=get_info
;
185 static inline struct proc_dir_entry
*proc_net_create(const char *name
,
186 mode_t mode
, get_info_t
*get_info
)
188 return create_proc_info_entry(name
,mode
,proc_net
,get_info
);
191 static inline struct proc_dir_entry
*proc_net_fops_create(const char *name
,
192 mode_t mode
, const struct file_operations
*fops
)
194 struct proc_dir_entry
*res
= create_proc_entry(name
, mode
, proc_net
);
196 res
->proc_fops
= fops
;
200 static inline void proc_net_remove(const char *name
)
202 remove_proc_entry(name
,proc_net
);
207 #define proc_root_driver NULL
208 #define proc_net NULL
209 #define proc_bus NULL
211 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
212 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
213 static inline void proc_net_remove(const char *name
) {}
215 static inline struct dentry
*proc_pid_unhash(struct task_struct
*p
) { return NULL
; }
216 static inline void proc_pid_flush(struct dentry
*proc_dentry
) { }
218 static inline struct proc_dir_entry
*create_proc_entry(const char *name
,
219 mode_t mode
, struct proc_dir_entry
*parent
) { return NULL
; }
221 #define remove_proc_entry(name, parent) do {} while (0)
223 static inline struct proc_dir_entry
*proc_symlink(const char *name
,
224 struct proc_dir_entry
*parent
,const char *dest
) {return NULL
;}
225 static inline struct proc_dir_entry
*proc_mkdir(const char *name
,
226 struct proc_dir_entry
*parent
) {return NULL
;}
228 static inline struct proc_dir_entry
*create_proc_read_entry(const char *name
,
229 mode_t mode
, struct proc_dir_entry
*base
,
230 read_proc_t
*read_proc
, void * data
) { return NULL
; }
231 static inline struct proc_dir_entry
*create_proc_info_entry(const char *name
,
232 mode_t mode
, struct proc_dir_entry
*base
, get_info_t
*get_info
)
236 static inline void proc_tty_register_driver(struct tty_driver
*driver
) {};
237 static inline void proc_tty_unregister_driver(struct tty_driver
*driver
) {};
239 extern struct proc_dir_entry proc_root
;
241 #endif /* CONFIG_PROC_FS */
243 #if !defined(CONFIG_PROC_KCORE)
244 static inline void kclist_add(struct kcore_list
*new, void *addr
, size_t size
)
248 extern void kclist_add(struct kcore_list
*, void *, size_t);
252 struct task_struct
*task
;
255 int (*proc_get_link
)(struct inode
*, struct dentry
**, struct vfsmount
**);
256 int (*proc_read
)(struct task_struct
*task
, char *page
);
258 struct proc_dir_entry
*pde
;
259 struct inode vfs_inode
;
262 static inline struct proc_inode
*PROC_I(const struct inode
*inode
)
264 return container_of(inode
, struct proc_inode
, vfs_inode
);
267 static inline struct proc_dir_entry
*PDE(const struct inode
*inode
)
269 return PROC_I(inode
)->pde
;
272 #endif /* _LINUX_PROC_FS_H */