1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
4 #include <linux/config.h>
5 #include <linux/slab.h>
7 #include <asm/atomic.h>
10 * The proc filesystem constants/structures
14 * Offset of the first process in the /proc root directory..
16 #define FIRST_PROCESS_ENTRY 256
20 * We always define these enumerators
27 #define PROC_SUPER_MAGIC 0x9fa0
30 * This is not completely implemented yet. The idea is to
31 * create an in-memory tree (like the actual /proc filesystem
32 * tree) of these proc_dir_entries, so that we can dynamically
33 * add new files to /proc.
35 * The "next" pointer creates a linked list of one /proc directory,
36 * while parent/subdir create the directory structure (every
37 * /proc file has a parent, but "subdir" is NULL for all
38 * non-directory entries).
40 * "get_info" is called at "read", while "owner" is used to protect module
41 * from unloading while proc_dir_entry is in use
44 typedef int (read_proc_t)(char *page, char **start, off_t off,
45 int count, int *eof, void *data);
46 typedef int (write_proc_t)(struct file *file, const char __user *buffer,
47 unsigned long count, void *data);
48 typedef int (get_info_t)(char *, char **, off_t, int);
50 struct proc_dir_entry {
52 unsigned short namelen;
60 struct inode_operations * proc_iops;
61 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 */
73 struct kcore_list *next;
80 extern struct proc_dir_entry proc_root;
81 extern struct proc_dir_entry *proc_root_fs;
82 extern struct proc_dir_entry *proc_net;
83 extern struct proc_dir_entry *proc_bus;
84 extern struct proc_dir_entry *proc_root_driver;
85 extern struct proc_dir_entry *proc_root_kcore;
87 extern void proc_root_init(void);
88 extern void proc_misc_init(void);
90 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
91 struct dentry *proc_pid_unhash(struct task_struct *p);
92 void proc_pid_flush(struct dentry *proc_dentry);
93 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
95 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
96 struct proc_dir_entry *parent);
97 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
99 extern struct vfsmount *proc_mnt;
100 extern int proc_fill_super(struct super_block *,void *,int);
101 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
103 extern int proc_match(int, const char *,struct proc_dir_entry *);
106 * These are generic /proc routines that use the internal
107 * "struct proc_dir_entry" tree to traverse the filesystem.
109 * The /proc root directory has extended versions to take care
110 * of the /proc/<pid> subdirectories.
112 extern int proc_readdir(struct file *, void *, filldir_t);
113 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
115 extern struct file_operations proc_kcore_operations;
116 extern struct file_operations proc_kmsg_operations;
117 extern struct file_operations ppc_htab_operations;
123 extern void proc_tty_init(void);
124 extern void proc_tty_register_driver(struct tty_driver *driver);
125 extern void proc_tty_unregister_driver(struct tty_driver *driver);
131 extern void proc_device_tree_init(void);
132 #ifdef CONFIG_PROC_DEVICETREE
133 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
134 #else /* !CONFIG_PROC_DEVICETREE */
135 static inline void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *pde)
139 #endif /* CONFIG_PROC_DEVICETREE */
141 extern struct proc_dir_entry *proc_symlink(const char *,
142 struct proc_dir_entry *, const char *);
143 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
144 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
145 struct proc_dir_entry *parent);
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 struct proc_dir_entry *proc_net_fops_create(const char *name,
174 mode_t mode, struct file_operations *fops)
176 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
178 res->proc_fops = fops;
182 static inline void proc_net_remove(const char *name)
184 remove_proc_entry(name,proc_net);
189 #define proc_root_driver NULL
190 #define proc_net NULL
192 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
193 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
194 static inline void proc_net_remove(const char *name) {}
196 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }
197 static inline void proc_pid_flush(struct dentry *proc_dentry) { }
199 static inline struct proc_dir_entry *create_proc_entry(const char *name,
200 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
202 #define remove_proc_entry(name, parent) do {} while (0)
204 static inline struct proc_dir_entry *proc_symlink(const char *name,
205 struct proc_dir_entry *parent,char *dest) {return NULL;}
206 static inline struct proc_dir_entry *proc_mkdir(const char *name,
207 struct proc_dir_entry *parent) {return NULL;}
209 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
210 mode_t mode, struct proc_dir_entry *base,
211 int (*read_proc)(char *, char **, off_t, int, int *, void *),
212 void * data) { return NULL; }
213 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
214 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
218 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
219 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
221 extern struct proc_dir_entry proc_root;
223 #endif /* CONFIG_PROC_FS */
225 #if !defined(CONFIG_PROC_FS)
226 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
229 static inline struct kcore_list * kclist_del(void *addr)
234 extern void kclist_add(struct kcore_list *, void *, size_t);
235 extern struct kcore_list *kclist_del(void *);
239 struct task_struct *task;
243 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
244 int (*proc_read)(struct task_struct *task, char *page);
245 int (*proc_vid_read)(int vid, char *page);
247 struct proc_dir_entry *pde;
248 struct inode vfs_inode;
251 static inline struct proc_inode *PROC_I(const struct inode *inode)
253 return container_of(inode, struct proc_inode, vfs_inode);
256 static inline struct proc_dir_entry *PDE(const struct inode *inode)
258 return PROC_I(inode)->pde;
261 #endif /* _LINUX_PROC_FS_H */