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;
59 struct inode_operations * proc_iops;
60 struct file_operations * proc_fops;
63 struct proc_dir_entry *next, *parent, *subdir;
65 read_proc_t *read_proc;
66 write_proc_t *write_proc;
67 atomic_t count; /* use count */
68 int deleted; /* delete flag */
72 struct kcore_list *next;
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_net_stat;
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);
92 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
93 struct dentry *proc_pid_unhash(struct task_struct *p);
94 void proc_pid_flush(struct dentry *proc_dentry);
95 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
96 unsigned long task_vsize(struct mm_struct *);
97 int task_statm(struct mm_struct *, int *, int *, int *, int *);
98 char *task_mem(struct mm_struct *, char *);
100 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
101 struct proc_dir_entry *parent);
102 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
104 extern struct vfsmount *proc_mnt;
105 extern int proc_fill_super(struct super_block *,void *,int);
106 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
108 extern int proc_match(int, const char *,struct proc_dir_entry *);
111 * These are generic /proc routines that use the internal
112 * "struct proc_dir_entry" tree to traverse the filesystem.
114 * The /proc root directory has extended versions to take care
115 * of the /proc/<pid> subdirectories.
117 extern int proc_readdir(struct file *, void *, filldir_t);
118 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
120 extern struct file_operations proc_kcore_operations;
121 extern struct file_operations proc_kmsg_operations;
122 extern struct file_operations ppc_htab_operations;
128 extern void proc_tty_init(void);
129 extern void proc_tty_register_driver(struct tty_driver *driver);
130 extern void proc_tty_unregister_driver(struct tty_driver *driver);
136 extern void proc_device_tree_init(void);
137 #ifdef CONFIG_PROC_DEVICETREE
138 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
139 #else /* !CONFIG_PROC_DEVICETREE */
140 static inline void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *pde)
144 #endif /* CONFIG_PROC_DEVICETREE */
146 extern struct proc_dir_entry *proc_symlink(const char *,
147 struct proc_dir_entry *, const char *);
148 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
149 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
150 struct proc_dir_entry *parent);
152 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
153 mode_t mode, struct proc_dir_entry *base,
154 read_proc_t *read_proc, void * data)
156 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
158 res->read_proc=read_proc;
164 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
165 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
167 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
168 if (res) res->get_info=get_info;
172 static inline struct proc_dir_entry *proc_net_create(const char *name,
173 mode_t mode, get_info_t *get_info)
175 return create_proc_info_entry(name,mode,proc_net,get_info);
178 static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
179 mode_t mode, struct file_operations *fops)
181 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
183 res->proc_fops = fops;
187 static inline void proc_net_remove(const char *name)
189 remove_proc_entry(name,proc_net);
194 #define proc_root_driver NULL
195 #define proc_net NULL
196 #define proc_bus NULL
198 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
199 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
200 static inline void proc_net_remove(const char *name) {}
202 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }
203 static inline void proc_pid_flush(struct dentry *proc_dentry) { }
205 static inline struct proc_dir_entry *create_proc_entry(const char *name,
206 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
208 #define remove_proc_entry(name, parent) do {} while (0)
210 static inline struct proc_dir_entry *proc_symlink(const char *name,
211 struct proc_dir_entry *parent,const char *dest) {return NULL;}
212 static inline struct proc_dir_entry *proc_mkdir(const char *name,
213 struct proc_dir_entry *parent) {return NULL;}
215 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
216 mode_t mode, struct proc_dir_entry *base,
217 read_proc_t *read_proc, void * data) { return NULL; }
218 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
219 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
223 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
224 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
226 extern struct proc_dir_entry proc_root;
228 #endif /* CONFIG_PROC_FS */
230 #if !defined(CONFIG_PROC_KCORE)
231 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
235 extern void kclist_add(struct kcore_list *, void *, size_t);
239 struct task_struct *task;
242 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
243 int (*proc_read)(struct task_struct *task, char *page);
245 struct proc_dir_entry *pde;
246 struct inode vfs_inode;
249 static inline struct proc_inode *PROC_I(const struct inode *inode)
251 return container_of(inode, struct proc_inode, vfs_inode);
254 static inline struct proc_dir_entry *PDE(const struct inode *inode)
256 return PROC_I(inode)->pde;
259 #endif /* _LINUX_PROC_FS_H */