1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
4 #include <linux/config.h>
5 #include <linux/slab.h>
8 * The proc filesystem constants/structures
12 * Offset of the first process in the /proc root directory..
14 #define FIRST_PROCESS_ENTRY 256
18 * We always define these enumerators
25 /* Finally, the dynamically allocatable proc entries are reserved: */
27 #define PROC_DYNAMIC_FIRST 4096
28 #define PROC_NDYNAMIC 4096
30 #define PROC_SUPER_MAGIC 0x9fa0
33 * This is not completely implemented yet. The idea is to
34 * create an in-memory tree (like the actual /proc filesystem
35 * tree) of these proc_dir_entries, so that we can dynamically
36 * add new files to /proc.
38 * The "next" pointer creates a linked list of one /proc directory,
39 * while parent/subdir create the directory structure (every
40 * /proc file has a parent, but "subdir" is NULL for all
41 * non-directory entries).
43 * "get_info" is called at "read", while "owner" is used to protect module
44 * from unloading while proc_dir_entry is in use
47 typedef int (read_proc_t)(char *page, char **start, off_t off,
48 int count, int *eof, void *data);
49 typedef int (write_proc_t)(struct file *file, const char *buffer,
50 unsigned long count, void *data);
51 typedef int (get_info_t)(char *, char **, off_t, int);
53 struct proc_dir_entry {
54 unsigned short low_ino;
55 unsigned short namelen;
62 struct inode_operations * proc_iops;
63 struct file_operations * proc_fops;
66 struct proc_dir_entry *next, *parent, *subdir;
68 read_proc_t *read_proc;
69 write_proc_t *write_proc;
70 atomic_t count; /* use count */
71 int deleted; /* delete flag */
75 #define PROC_INODE_PROPER(inode) ((inode)->i_ino & ~0xffff)
79 extern struct proc_dir_entry proc_root;
80 extern struct proc_dir_entry *proc_root_fs;
81 extern struct proc_dir_entry *proc_net;
82 extern struct proc_dir_entry *proc_bus;
83 extern struct proc_dir_entry *proc_root_driver;
84 extern struct proc_dir_entry *proc_root_kcore;
86 extern void proc_root_init(void);
87 extern void proc_misc_init(void);
89 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry);
90 void proc_pid_delete_inode(struct inode *inode);
91 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
93 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
94 struct proc_dir_entry *parent);
95 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
97 extern struct vfsmount *proc_mnt;
98 extern struct super_block *proc_read_super(struct super_block *,void *,int);
99 extern struct inode * proc_get_inode(struct super_block *, int, struct proc_dir_entry *);
101 extern int proc_match(int, const char *,struct proc_dir_entry *);
104 * These are generic /proc routines that use the internal
105 * "struct proc_dir_entry" tree to traverse the filesystem.
107 * The /proc root directory has extended versions to take care
108 * of the /proc/<pid> subdirectories.
110 extern int proc_readdir(struct file *, void *, filldir_t);
111 extern struct dentry *proc_lookup(struct inode *, struct dentry *);
113 extern struct file_operations proc_kcore_operations;
114 extern struct file_operations proc_kmsg_operations;
115 extern struct file_operations ppc_htab_operations;
121 extern void proc_tty_init(void);
122 extern void proc_tty_register_driver(struct tty_driver *driver);
123 extern void proc_tty_unregister_driver(struct tty_driver *driver);
128 extern void proc_device_tree_init(void);
133 extern void proc_rtas_init(void);
138 extern void proc_ppc64_init(void);
139 extern void iSeries_proc_create(void);
141 extern struct proc_dir_entry *proc_symlink(const char *,
142 struct proc_dir_entry *, const char *);
143 extern struct proc_dir_entry *proc_mknod(const char *,mode_t,
144 struct proc_dir_entry *,kdev_t);
145 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
147 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
148 mode_t mode, struct proc_dir_entry *base,
149 read_proc_t *read_proc, void * data)
151 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
153 res->read_proc=read_proc;
159 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
160 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
162 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
163 if (res) res->get_info=get_info;
167 static inline struct proc_dir_entry *proc_net_create(const char *name,
168 mode_t mode, get_info_t *get_info)
170 return create_proc_info_entry(name,mode,proc_net,get_info);
173 static inline void proc_net_remove(const char *name)
175 remove_proc_entry(name,proc_net);
180 #define proc_root_driver NULL
182 static inline struct proc_dir_entry *proc_net_create(const char *name, mode_t mode,
183 get_info_t *get_info) {return NULL;}
184 static inline void proc_net_remove(const char *name) {}
186 static inline struct proc_dir_entry *create_proc_entry(const char *name,
187 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
189 static inline void remove_proc_entry(const char *name, struct proc_dir_entry *parent) {};
190 static inline struct proc_dir_entry *proc_symlink(const char *name,
191 struct proc_dir_entry *parent,char *dest) {return NULL;}
192 static inline struct proc_dir_entry *proc_mknod(const char *name,mode_t mode,
193 struct proc_dir_entry *parent,kdev_t rdev) {return NULL;}
194 static inline struct proc_dir_entry *proc_mkdir(const char *name,
195 struct proc_dir_entry *parent) {return NULL;}
197 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
198 mode_t mode, struct proc_dir_entry *base,
199 int (*read_proc)(char *, char **, off_t, int, int *, void *),
200 void * data) { return NULL; }
201 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
202 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
205 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
206 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
208 extern struct proc_dir_entry proc_root;
210 #endif /* CONFIG_PROC_FS */
212 #endif /* _LINUX_PROC_FS_H */