1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
4 #include <linux/slab.h>
6 #include <linux/spinlock.h>
7 #include <linux/magic.h>
8 #include <asm/atomic.h>
14 * The proc filesystem constants/structures
18 * Offset of the first process in the /proc root directory..
20 #define FIRST_PROCESS_ENTRY 256
24 * We always define these enumerators
32 * This is not completely implemented yet. The idea is to
33 * create an in-memory tree (like the actual /proc filesystem
34 * tree) of these proc_dir_entries, so that we can dynamically
35 * add new files to /proc.
37 * The "next" pointer creates a linked list of one /proc directory,
38 * while parent/subdir create the directory structure (every
39 * /proc file has a parent, but "subdir" is NULL for all
40 * non-directory entries).
42 * "get_info" is called at "read", while "owner" is used to protect module
43 * from unloading while proc_dir_entry is in use
46 typedef int (read_proc_t)(char *page, char **start, off_t off,
47 int count, int *eof, void *data);
48 typedef int (write_proc_t)(struct file *file, const char __user *buffer,
49 unsigned long count, void *data);
50 typedef int (get_info_t)(char *, char **, off_t, int);
52 struct proc_dir_entry {
54 unsigned short namelen;
61 const struct inode_operations *proc_iops;
63 * NULL ->proc_fops means "PDE is going away RSN" or
64 * "PDE is just created". In either case, e.g. ->read_proc won't be
65 * called because it's too late or too early, respectively.
67 * If you're allocating ->proc_fops dynamically, save a pointer
70 const struct file_operations *proc_fops;
73 struct proc_dir_entry *next, *parent, *subdir;
75 read_proc_t *read_proc;
76 write_proc_t *write_proc;
77 atomic_t count; /* use count */
78 int deleted; /* delete flag */
79 int pde_users; /* number of callers into module in progress */
80 spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
81 struct completion *pde_unload_completion;
85 struct kcore_list *next;
91 struct list_head list;
92 unsigned long long paddr;
93 unsigned long long size;
99 extern struct proc_dir_entry proc_root;
100 extern struct proc_dir_entry *proc_root_fs;
101 extern struct proc_dir_entry *proc_bus;
102 extern struct proc_dir_entry *proc_root_driver;
103 extern struct proc_dir_entry *proc_root_kcore;
105 extern spinlock_t proc_subdir_lock;
107 extern void proc_root_init(void);
108 extern void proc_misc_init(void);
112 void proc_flush_task(struct task_struct *task);
113 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
114 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
115 unsigned long task_vsize(struct mm_struct *);
116 int task_statm(struct mm_struct *, int *, int *, int *, int *);
117 char *task_mem(struct mm_struct *, char *);
118 void clear_refs_smap(struct mm_struct *mm);
120 struct proc_dir_entry *de_get(struct proc_dir_entry *de);
121 void de_put(struct proc_dir_entry *de);
123 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
124 struct proc_dir_entry *parent);
125 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
127 extern struct vfsmount *proc_mnt;
128 extern int proc_fill_super(struct super_block *,void *,int);
129 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
132 * These are generic /proc routines that use the internal
133 * "struct proc_dir_entry" tree to traverse the filesystem.
135 * The /proc root directory has extended versions to take care
136 * of the /proc/<pid> subdirectories.
138 extern int proc_readdir(struct file *, void *, filldir_t);
139 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
141 extern const struct file_operations proc_kcore_operations;
142 extern const struct file_operations proc_kmsg_operations;
143 extern const struct file_operations ppc_htab_operations;
149 extern void proc_tty_init(void);
150 extern void proc_tty_register_driver(struct tty_driver *driver);
151 extern void proc_tty_unregister_driver(struct tty_driver *driver);
156 #ifdef CONFIG_PROC_DEVICETREE
159 extern void proc_device_tree_init(void);
160 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
161 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
162 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
163 struct property *prop);
164 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
165 struct property *newprop,
166 struct property *oldprop);
167 #endif /* CONFIG_PROC_DEVICETREE */
169 extern struct proc_dir_entry *proc_symlink(const char *,
170 struct proc_dir_entry *, const char *);
171 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
172 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
173 struct proc_dir_entry *parent);
175 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
176 mode_t mode, struct proc_dir_entry *base,
177 read_proc_t *read_proc, void * data)
179 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
181 res->read_proc=read_proc;
187 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
188 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
190 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
191 if (res) res->get_info=get_info;
195 extern struct proc_dir_entry *proc_net_create(struct net *net,
196 const char *name, mode_t mode, get_info_t *get_info);
197 extern struct proc_dir_entry *proc_net_fops_create(struct net *net,
198 const char *name, mode_t mode, const struct file_operations *fops);
199 extern void proc_net_remove(struct net *net, const char *name);
203 #define proc_root_driver NULL
204 #define proc_bus NULL
206 #define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; })
207 #define proc_net_create(net, name, mode, info) ({ (void)(mode), NULL; })
208 static inline void proc_net_remove(struct net *net, const char *name) {}
210 static inline void proc_flush_task(struct task_struct *task) { }
212 static inline struct proc_dir_entry *create_proc_entry(const char *name,
213 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
215 #define remove_proc_entry(name, parent) do {} while (0)
217 static inline struct proc_dir_entry *proc_symlink(const char *name,
218 struct proc_dir_entry *parent,const char *dest) {return NULL;}
219 static inline struct proc_dir_entry *proc_mkdir(const char *name,
220 struct proc_dir_entry *parent) {return NULL;}
222 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
223 mode_t mode, struct proc_dir_entry *base,
224 read_proc_t *read_proc, void * data) { return NULL; }
225 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
226 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
230 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
231 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
233 extern struct proc_dir_entry proc_root;
235 #endif /* CONFIG_PROC_FS */
237 #if !defined(CONFIG_PROC_KCORE)
238 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
242 extern void kclist_add(struct kcore_list *, void *, size_t);
246 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
247 int (*proc_read)(struct task_struct *task, char *page);
254 struct proc_dir_entry *pde;
255 struct inode vfs_inode;
258 static inline struct proc_inode *PROC_I(const struct inode *inode)
260 return container_of(inode, struct proc_inode, vfs_inode);
263 static inline struct proc_dir_entry *PDE(const struct inode *inode)
265 return PROC_I(inode)->pde;
268 static inline struct net *PDE_NET(struct proc_dir_entry *pde)
270 return pde->parent->data;
273 struct net *get_proc_net(const struct inode *inode);
275 struct proc_maps_private {
277 struct task_struct *task;
279 struct vm_area_struct *tail_vma;
283 #endif /* _LINUX_PROC_FS_H */