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;
60 struct inode_operations * proc_iops;
61 const 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 spinlock_t proc_subdir_lock;
98 extern void proc_root_init(void);
99 extern void proc_misc_init(void);
103 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
104 struct dentry *proc_pid_unhash(struct task_struct *p);
105 void proc_pid_flush(struct dentry *proc_dentry);
106 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
107 unsigned long task_vsize(struct mm_struct *);
108 int task_statm(struct mm_struct *, int *, int *, int *, int *);
109 char *task_mem(struct mm_struct *, char *);
111 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
112 struct proc_dir_entry *parent);
113 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
115 extern struct vfsmount *proc_mnt;
116 extern int proc_fill_super(struct super_block *,void *,int);
117 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
119 extern int proc_match(int, const char *,struct proc_dir_entry *);
122 * These are generic /proc routines that use the internal
123 * "struct proc_dir_entry" tree to traverse the filesystem.
125 * The /proc root directory has extended versions to take care
126 * of the /proc/<pid> subdirectories.
128 extern int proc_readdir(struct file *, void *, filldir_t);
129 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
131 extern const struct file_operations proc_kcore_operations;
132 extern const struct file_operations proc_kmsg_operations;
133 extern const struct file_operations ppc_htab_operations;
139 extern void proc_tty_init(void);
140 extern void proc_tty_register_driver(struct tty_driver *driver);
141 extern void proc_tty_unregister_driver(struct tty_driver *driver);
146 #ifdef CONFIG_PROC_DEVICETREE
149 extern void proc_device_tree_init(void);
150 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
151 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
152 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
153 struct property *prop);
154 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
155 struct property *newprop,
156 struct property *oldprop);
157 #endif /* CONFIG_PROC_DEVICETREE */
159 extern struct proc_dir_entry *proc_symlink(const char *,
160 struct proc_dir_entry *, const char *);
161 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
162 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
163 struct proc_dir_entry *parent);
165 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
166 mode_t mode, struct proc_dir_entry *base,
167 read_proc_t *read_proc, void * data)
169 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
171 res->read_proc=read_proc;
177 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
178 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
180 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
181 if (res) res->get_info=get_info;
185 static inline struct proc_dir_entry *proc_net_create(const char *name,
186 mode_t mode, get_info_t *get_info)
188 return create_proc_info_entry(name,mode,proc_net,get_info);
191 static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
192 mode_t mode, const struct file_operations *fops)
194 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
196 res->proc_fops = fops;
200 static inline void proc_net_remove(const char *name)
202 remove_proc_entry(name,proc_net);
207 #define proc_root_driver NULL
208 #define proc_net NULL
209 #define proc_bus NULL
211 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
212 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
213 static inline void proc_net_remove(const char *name) {}
215 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }
216 static inline void proc_pid_flush(struct dentry *proc_dentry) { }
218 static inline struct proc_dir_entry *create_proc_entry(const char *name,
219 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
221 #define remove_proc_entry(name, parent) do {} while (0)
223 static inline struct proc_dir_entry *proc_symlink(const char *name,
224 struct proc_dir_entry *parent,const char *dest) {return NULL;}
225 static inline struct proc_dir_entry *proc_mkdir(const char *name,
226 struct proc_dir_entry *parent) {return NULL;}
228 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
229 mode_t mode, struct proc_dir_entry *base,
230 read_proc_t *read_proc, void * data) { return NULL; }
231 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
232 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
236 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
237 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
239 extern struct proc_dir_entry proc_root;
241 #endif /* CONFIG_PROC_FS */
243 #if !defined(CONFIG_PROC_KCORE)
244 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
248 extern void kclist_add(struct kcore_list *, void *, size_t);
252 struct task_struct *task;
255 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
256 int (*proc_read)(struct task_struct *task, 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 */