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 <linux/atomic.h>
15 * The proc filesystem constants/structures
19 * Offset of the first process in the /proc root directory..
21 #define FIRST_PROCESS_ENTRY 256
23 /* Worst case buffer size needed for holding an integer. */
24 #define PROC_NUMBUF 13
27 * We always define these enumerators
32 PROC_IPC_INIT_INO = 0xEFFFFFFFU,
33 PROC_UTS_INIT_INO = 0xEFFFFFFEU,
34 PROC_USER_INIT_INO = 0xEFFFFFFDU,
35 PROC_PID_INIT_INO = 0xEFFFFFFCU,
39 * This is not completely implemented yet. The idea is to
40 * create an in-memory tree (like the actual /proc filesystem
41 * tree) of these proc_dir_entries, so that we can dynamically
42 * add new files to /proc.
44 * The "next" pointer creates a linked list of one /proc directory,
45 * while parent/subdir create the directory structure (every
46 * /proc file has a parent, but "subdir" is NULL for all
47 * non-directory entries).
50 typedef int (read_proc_t)(char *page, char **start, off_t off,
51 int count, int *eof, void *data);
52 typedef int (write_proc_t)(struct file *file, const char __user *buffer,
53 unsigned long count, void *data);
55 struct proc_dir_entry {
62 const struct inode_operations *proc_iops;
63 const struct file_operations *proc_fops;
64 struct proc_dir_entry *next, *parent, *subdir;
66 read_proc_t *read_proc;
67 atomic_t count; /* use count */
68 atomic_t in_use; /* number of callers into module in progress; */
69 /* negative -> it's going away RSN */
70 struct completion *pde_unload_completion;
71 struct list_head pde_openers; /* who did ->open, but not ->release */
72 spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
86 struct list_head list;
93 struct list_head list;
94 unsigned long long paddr;
95 unsigned long long size;
101 extern void proc_root_init(void);
103 void proc_flush_task(struct task_struct *task);
105 struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
106 struct proc_dir_entry *parent,
107 const struct file_operations *proc_fops,
109 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
110 extern int remove_proc_subtree(const char *name, struct proc_dir_entry *parent);
112 struct pid_namespace;
114 extern int pid_ns_prepare_proc(struct pid_namespace *ns);
115 extern void pid_ns_release_proc(struct pid_namespace *ns);
122 extern void proc_tty_init(void);
124 static inline void proc_tty_init(void)
127 extern void proc_tty_register_driver(struct tty_driver *driver);
128 extern void proc_tty_unregister_driver(struct tty_driver *driver);
133 #ifdef CONFIG_PROC_DEVICETREE
136 extern void proc_device_tree_init(void);
137 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
138 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
139 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
140 struct property *prop);
141 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
142 struct property *newprop,
143 struct property *oldprop);
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, umode_t mode,
150 struct proc_dir_entry *parent);
152 static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode,
153 struct proc_dir_entry *parent, const struct file_operations *proc_fops)
155 return proc_create_data(name, mode, parent, proc_fops, NULL);
159 struct proc_dir_entry *create_proc_read_entry(const char *name,
160 umode_t mode, struct proc_dir_entry *base,
161 read_proc_t *read_proc, void *data);
163 extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
164 struct proc_dir_entry *parent);
166 extern struct file *proc_ns_fget(int fd);
167 extern bool proc_ns_inode(struct inode *inode);
169 extern int proc_alloc_inum(unsigned int *pino);
170 extern void proc_free_inum(unsigned int inum);
173 static inline void proc_flush_task(struct task_struct *task)
177 #define proc_create(name, mode, parent, fops) ({ (void)(mode), NULL; })
179 static inline struct proc_dir_entry *proc_create_data(const char *name,
180 umode_t mode, struct proc_dir_entry *parent,
181 const struct file_operations *proc_fops, void *data)
185 #define remove_proc_entry(name, parent) do {} while (0)
186 #define remove_proc_subtree(name, parent) do {} while (0)
188 static inline struct proc_dir_entry *proc_symlink(const char *name,
189 struct proc_dir_entry *parent,const char *dest) {return NULL;}
190 static inline struct proc_dir_entry *proc_mkdir(const char *name,
191 struct proc_dir_entry *parent) {return NULL;}
192 static inline struct proc_dir_entry *proc_mkdir_mode(const char *name,
193 umode_t mode, struct proc_dir_entry *parent) { return NULL; }
195 static inline __deprecated
196 struct proc_dir_entry *create_proc_read_entry(const char *name,
197 umode_t mode, struct proc_dir_entry *base,
198 read_proc_t *read_proc, void * data) { return NULL; }
201 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
202 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
204 static inline int pid_ns_prepare_proc(struct pid_namespace *ns)
209 static inline void pid_ns_release_proc(struct pid_namespace *ns)
213 static inline struct file *proc_ns_fget(int fd)
215 return ERR_PTR(-EINVAL);
218 static inline bool proc_ns_inode(struct inode *inode)
223 static inline int proc_alloc_inum(unsigned int *inum)
228 static inline void proc_free_inum(unsigned int inum)
231 #endif /* CONFIG_PROC_FS */
233 #if !defined(CONFIG_PROC_KCORE)
235 kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
239 extern void kclist_add(struct kcore_list *, void *, size_t, int type);
243 struct proc_ns_operations {
246 void *(*get)(struct task_struct *task);
247 void (*put)(void *ns);
248 int (*install)(struct nsproxy *nsproxy, void *ns);
249 unsigned int (*inum)(void *ns);
251 extern const struct proc_ns_operations netns_operations;
252 extern const struct proc_ns_operations utsns_operations;
253 extern const struct proc_ns_operations ipcns_operations;
254 extern const struct proc_ns_operations pidns_operations;
255 extern const struct proc_ns_operations userns_operations;
256 extern const struct proc_ns_operations mntns_operations;
259 int (*proc_get_link)(struct dentry *, struct path *);
260 int (*proc_read)(struct task_struct *task, char *page);
261 int (*proc_show)(struct seq_file *m,
262 struct pid_namespace *ns, struct pid *pid,
263 struct task_struct *task);
266 struct ctl_table_header;
273 struct proc_dir_entry *pde;
274 struct ctl_table_header *sysctl;
275 struct ctl_table *sysctl_entry;
277 const struct proc_ns_operations *ns_ops;
278 struct inode vfs_inode;
281 static inline struct proc_inode *PROC_I(const struct inode *inode)
283 return container_of(inode, struct proc_inode, vfs_inode);
286 static inline struct proc_dir_entry *PDE(const struct inode *inode)
288 return PROC_I(inode)->pde;
291 static inline void *PDE_DATA(const struct inode *inode)
293 return PROC_I(inode)->pde->data;
296 static inline struct net *PDE_NET(struct proc_dir_entry *pde)
298 return pde->parent->data;
301 #include <linux/signal.h>
303 void render_sigset_t(struct seq_file *m, const char *header, sigset_t *set);
304 #endif /* _LINUX_PROC_FS_H */