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;
61 struct inode_operations * proc_iops;
62 const struct file_operations * proc_fops;
65 struct proc_dir_entry *next, *parent, *subdir;
67 read_proc_t *read_proc;
68 write_proc_t *write_proc;
69 atomic_t count; /* use count */
70 int deleted; /* delete flag */
75 struct kcore_list *next;
81 struct list_head list;
82 unsigned long long paddr;
83 unsigned long long size;
89 extern struct proc_dir_entry proc_root;
90 extern struct proc_dir_entry *proc_root_fs;
91 extern struct proc_dir_entry *proc_net;
92 extern struct proc_dir_entry *proc_net_stat;
93 extern struct proc_dir_entry *proc_bus;
94 extern struct proc_dir_entry *proc_root_driver;
95 extern struct proc_dir_entry *proc_root_kcore;
97 extern spinlock_t proc_subdir_lock;
99 extern void proc_root_init(void);
100 extern void proc_misc_init(void);
104 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
105 struct dentry *proc_pid_unhash(struct task_struct *p);
106 void proc_pid_flush(struct dentry *proc_dentry);
107 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
108 unsigned long task_vsize(struct mm_struct *);
109 int task_statm(struct mm_struct *, int *, int *, int *, int *);
110 char *task_mem(struct mm_struct *, char *);
112 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
113 struct proc_dir_entry *parent);
114 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
116 extern struct vfsmount *proc_mnt;
117 extern int proc_fill_super(struct super_block *,void *,int);
118 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
120 extern int proc_match(int, const char *,struct proc_dir_entry *);
123 * These are generic /proc routines that use the internal
124 * "struct proc_dir_entry" tree to traverse the filesystem.
126 * The /proc root directory has extended versions to take care
127 * of the /proc/<pid> subdirectories.
129 extern int proc_readdir(struct file *, void *, filldir_t);
130 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
132 extern const struct file_operations proc_kcore_operations;
133 extern const struct file_operations proc_kmsg_operations;
134 extern const struct file_operations ppc_htab_operations;
140 extern void proc_tty_init(void);
141 extern void proc_tty_register_driver(struct tty_driver *driver);
142 extern void proc_tty_unregister_driver(struct tty_driver *driver);
147 #ifdef CONFIG_PROC_DEVICETREE
150 extern void proc_device_tree_init(void);
151 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
152 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
153 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
154 struct property *prop);
155 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
156 struct property *newprop,
157 struct property *oldprop);
158 #endif /* CONFIG_PROC_DEVICETREE */
160 extern struct proc_dir_entry *proc_symlink(const char *,
161 struct proc_dir_entry *, const char *);
162 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
163 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
164 struct proc_dir_entry *parent);
166 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
167 mode_t mode, struct proc_dir_entry *base,
168 read_proc_t *read_proc, void * data)
170 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
172 res->read_proc=read_proc;
178 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
179 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
181 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
182 if (res) res->get_info=get_info;
186 static inline struct proc_dir_entry *proc_net_create(const char *name,
187 mode_t mode, get_info_t *get_info)
189 return create_proc_info_entry(name,mode,proc_net,get_info);
192 static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
193 mode_t mode, const struct file_operations *fops)
195 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
197 res->proc_fops = fops;
201 static inline void proc_net_remove(const char *name)
203 remove_proc_entry(name,proc_net);
208 #define proc_root_driver NULL
209 #define proc_net NULL
210 #define proc_bus NULL
212 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
213 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
214 static inline void proc_net_remove(const char *name) {}
216 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }
217 static inline void proc_pid_flush(struct dentry *proc_dentry) { }
219 static inline struct proc_dir_entry *create_proc_entry(const char *name,
220 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
222 #define remove_proc_entry(name, parent) do {} while (0)
224 static inline struct proc_dir_entry *proc_symlink(const char *name,
225 struct proc_dir_entry *parent,const char *dest) {return NULL;}
226 static inline struct proc_dir_entry *proc_mkdir(const char *name,
227 struct proc_dir_entry *parent) {return NULL;}
229 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
230 mode_t mode, struct proc_dir_entry *base,
231 read_proc_t *read_proc, void * data) { return NULL; }
232 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
233 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
237 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
238 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
240 extern struct proc_dir_entry proc_root;
242 #endif /* CONFIG_PROC_FS */
244 #if !defined(CONFIG_PROC_KCORE)
245 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
249 extern void kclist_add(struct kcore_list *, void *, size_t);
253 struct task_struct *task;
257 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
258 int (*proc_read)(struct task_struct *task, char *page);
259 int (*proc_vid_read)(int vid, char *page);
261 struct proc_dir_entry *pde;
262 struct inode vfs_inode;
265 static inline struct proc_inode *PROC_I(const struct inode *inode)
267 return container_of(inode, struct proc_inode, vfs_inode);
270 static inline struct proc_dir_entry *PDE(const struct inode *inode)
272 return PROC_I(inode)->pde;
275 #endif /* _LINUX_PROC_FS_H */