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 */
74 struct kcore_list *next;
80 struct list_head list;
81 unsigned long long paddr;
82 unsigned long long size;
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 void proc_root_init(void);
97 extern void proc_misc_init(void);
101 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
102 struct dentry *proc_pid_unhash(struct task_struct *p);
103 void proc_pid_flush(struct dentry *proc_dentry);
104 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
105 unsigned long task_vsize(struct mm_struct *);
106 int task_statm(struct mm_struct *, int *, int *, int *, int *);
107 char *task_mem(struct mm_struct *, char *);
109 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
110 struct proc_dir_entry *parent);
111 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
113 extern struct vfsmount *proc_mnt;
114 extern int proc_fill_super(struct super_block *,void *,int);
115 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
117 extern int proc_match(int, const char *,struct proc_dir_entry *);
120 * These are generic /proc routines that use the internal
121 * "struct proc_dir_entry" tree to traverse the filesystem.
123 * The /proc root directory has extended versions to take care
124 * of the /proc/<pid> subdirectories.
126 extern int proc_readdir(struct file *, void *, filldir_t);
127 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
129 extern struct file_operations proc_kcore_operations;
130 extern struct file_operations proc_kmsg_operations;
131 extern struct file_operations ppc_htab_operations;
137 extern void proc_tty_init(void);
138 extern void proc_tty_register_driver(struct tty_driver *driver);
139 extern void proc_tty_unregister_driver(struct tty_driver *driver);
144 #ifdef CONFIG_PROC_DEVICETREE
147 extern void proc_device_tree_init(void);
148 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
149 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
150 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
151 struct property *prop);
152 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
153 struct property *newprop,
154 struct property *oldprop);
155 #endif /* CONFIG_PROC_DEVICETREE */
157 extern struct proc_dir_entry *proc_symlink(const char *,
158 struct proc_dir_entry *, const char *);
159 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
160 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
161 struct proc_dir_entry *parent);
163 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
164 mode_t mode, struct proc_dir_entry *base,
165 read_proc_t *read_proc, void * data)
167 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
169 res->read_proc=read_proc;
175 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
176 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
178 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
179 if (res) res->get_info=get_info;
183 static inline struct proc_dir_entry *proc_net_create(const char *name,
184 mode_t mode, get_info_t *get_info)
186 return create_proc_info_entry(name,mode,proc_net,get_info);
189 static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
190 mode_t mode, struct file_operations *fops)
192 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
194 res->proc_fops = fops;
198 static inline void proc_net_remove(const char *name)
200 remove_proc_entry(name,proc_net);
205 #define proc_root_driver NULL
206 #define proc_net NULL
207 #define proc_bus NULL
209 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
210 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
211 static inline void proc_net_remove(const char *name) {}
213 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }
214 static inline void proc_pid_flush(struct dentry *proc_dentry) { }
216 static inline struct proc_dir_entry *create_proc_entry(const char *name,
217 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
219 #define remove_proc_entry(name, parent) do {} while (0)
221 static inline struct proc_dir_entry *proc_symlink(const char *name,
222 struct proc_dir_entry *parent,const char *dest) {return NULL;}
223 static inline struct proc_dir_entry *proc_mkdir(const char *name,
224 struct proc_dir_entry *parent) {return NULL;}
226 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
227 mode_t mode, struct proc_dir_entry *base,
228 read_proc_t *read_proc, void * data) { return NULL; }
229 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
230 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
234 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
235 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
237 extern struct proc_dir_entry proc_root;
239 #endif /* CONFIG_PROC_FS */
241 #if !defined(CONFIG_PROC_KCORE)
242 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
246 extern void kclist_add(struct kcore_list *, void *, size_t);
250 struct task_struct *task;
254 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
255 int (*proc_read)(struct task_struct *task, char *page);
256 int (*proc_vid_read)(int vid, 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 */