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
;
64 * NULL ->proc_fops means "PDE is going away RSN" or
65 * "PDE is just created". In either case, e.g. ->read_proc won't be
66 * called because it's too late or too early, respectively.
68 * If you're allocating ->proc_fops dynamically, save a pointer
71 const struct file_operations
*proc_fops
;
72 struct proc_dir_entry
*next
, *parent
, *subdir
;
74 read_proc_t
*read_proc
;
75 write_proc_t
*write_proc
;
76 atomic_t count
; /* use count */
77 int pde_users
; /* number of callers into module in progress */
78 struct completion
*pde_unload_completion
;
79 struct list_head pde_openers
; /* who did ->open, but not ->release */
80 spinlock_t pde_unload_lock
; /* proc_fops checks and pde_users bumps */
94 struct list_head list
;
101 struct list_head list
;
102 unsigned long long paddr
;
103 unsigned long long size
;
107 #ifdef CONFIG_PROC_FS
109 extern void proc_root_init(void);
111 void proc_flush_task(struct task_struct
*task
);
113 extern struct proc_dir_entry
*create_proc_entry(const char *name
, umode_t mode
,
114 struct proc_dir_entry
*parent
);
115 struct proc_dir_entry
*proc_create_data(const char *name
, umode_t mode
,
116 struct proc_dir_entry
*parent
,
117 const struct file_operations
*proc_fops
,
119 extern void remove_proc_entry(const char *name
, struct proc_dir_entry
*parent
);
121 struct pid_namespace
;
123 extern int pid_ns_prepare_proc(struct pid_namespace
*ns
);
124 extern void pid_ns_release_proc(struct pid_namespace
*ns
);
130 extern void proc_tty_init(void);
131 extern void proc_tty_register_driver(struct tty_driver
*driver
);
132 extern void proc_tty_unregister_driver(struct tty_driver
*driver
);
137 #ifdef CONFIG_PROC_DEVICETREE
140 extern void proc_device_tree_init(void);
141 extern void proc_device_tree_add_node(struct device_node
*, struct proc_dir_entry
*);
142 extern void proc_device_tree_add_prop(struct proc_dir_entry
*pde
, struct property
*prop
);
143 extern void proc_device_tree_remove_prop(struct proc_dir_entry
*pde
,
144 struct property
*prop
);
145 extern void proc_device_tree_update_prop(struct proc_dir_entry
*pde
,
146 struct property
*newprop
,
147 struct property
*oldprop
);
148 #endif /* CONFIG_PROC_DEVICETREE */
150 extern struct proc_dir_entry
*proc_symlink(const char *,
151 struct proc_dir_entry
*, const char *);
152 extern struct proc_dir_entry
*proc_mkdir(const char *,struct proc_dir_entry
*);
153 extern struct proc_dir_entry
*proc_mkdir_mode(const char *name
, umode_t mode
,
154 struct proc_dir_entry
*parent
);
156 static inline struct proc_dir_entry
*proc_create(const char *name
, umode_t mode
,
157 struct proc_dir_entry
*parent
, const struct file_operations
*proc_fops
)
159 return proc_create_data(name
, mode
, parent
, proc_fops
, NULL
);
162 static inline struct proc_dir_entry
*create_proc_read_entry(const char *name
,
163 umode_t mode
, struct proc_dir_entry
*base
,
164 read_proc_t
*read_proc
, void * data
)
166 struct proc_dir_entry
*res
=create_proc_entry(name
,mode
,base
);
168 res
->read_proc
=read_proc
;
174 extern void proc_net_remove(struct net
*net
, const char *name
);
175 extern struct proc_dir_entry
*proc_net_mkdir(struct net
*net
, const char *name
,
176 struct proc_dir_entry
*parent
);
178 extern struct file
*proc_ns_fget(int fd
);
179 extern bool proc_ns_inode(struct inode
*inode
);
181 extern int proc_alloc_inum(unsigned int *pino
);
182 extern void proc_free_inum(unsigned int inum
);
185 static inline void proc_net_remove(struct net
*net
, const char *name
) {}
187 static inline void proc_flush_task(struct task_struct
*task
)
191 static inline struct proc_dir_entry
*create_proc_entry(const char *name
,
192 umode_t mode
, struct proc_dir_entry
*parent
) { return NULL
; }
193 static inline struct proc_dir_entry
*proc_create(const char *name
,
194 umode_t mode
, struct proc_dir_entry
*parent
,
195 const struct file_operations
*proc_fops
)
199 static inline struct proc_dir_entry
*proc_create_data(const char *name
,
200 umode_t mode
, struct proc_dir_entry
*parent
,
201 const struct file_operations
*proc_fops
, void *data
)
205 #define remove_proc_entry(name, parent) do {} while (0)
207 static inline struct proc_dir_entry
*proc_symlink(const char *name
,
208 struct proc_dir_entry
*parent
,const char *dest
) {return NULL
;}
209 static inline struct proc_dir_entry
*proc_mkdir(const char *name
,
210 struct proc_dir_entry
*parent
) {return NULL
;}
211 static inline struct proc_dir_entry
*proc_mkdir_mode(const char *name
,
212 umode_t mode
, struct proc_dir_entry
*parent
) { return NULL
; }
214 static inline struct proc_dir_entry
*create_proc_read_entry(const char *name
,
215 umode_t mode
, struct proc_dir_entry
*base
,
216 read_proc_t
*read_proc
, void * data
) { return NULL
; }
219 static inline void proc_tty_register_driver(struct tty_driver
*driver
) {};
220 static inline void proc_tty_unregister_driver(struct tty_driver
*driver
) {};
222 static inline int pid_ns_prepare_proc(struct pid_namespace
*ns
)
227 static inline void pid_ns_release_proc(struct pid_namespace
*ns
)
231 static inline struct file
*proc_ns_fget(int fd
)
233 return ERR_PTR(-EINVAL
);
236 static inline bool proc_ns_inode(struct inode
*inode
)
241 static inline int proc_alloc_inum(unsigned int *inum
)
246 static inline void proc_free_inum(unsigned int inum
)
249 #endif /* CONFIG_PROC_FS */
251 #if !defined(CONFIG_PROC_KCORE)
253 kclist_add(struct kcore_list
*new, void *addr
, size_t size
, int type
)
257 extern void kclist_add(struct kcore_list
*, void *, size_t, int type
);
261 struct proc_ns_operations
{
264 void *(*get
)(struct task_struct
*task
);
265 void (*put
)(void *ns
);
266 int (*install
)(struct nsproxy
*nsproxy
, void *ns
);
267 unsigned int (*inum
)(void *ns
);
269 extern const struct proc_ns_operations netns_operations
;
270 extern const struct proc_ns_operations utsns_operations
;
271 extern const struct proc_ns_operations ipcns_operations
;
272 extern const struct proc_ns_operations pidns_operations
;
273 extern const struct proc_ns_operations userns_operations
;
274 extern const struct proc_ns_operations mntns_operations
;
277 int (*proc_get_link
)(struct dentry
*, struct path
*);
278 int (*proc_read
)(struct task_struct
*task
, char *page
);
279 int (*proc_show
)(struct seq_file
*m
,
280 struct pid_namespace
*ns
, struct pid
*pid
,
281 struct task_struct
*task
);
284 struct ctl_table_header
;
291 struct proc_dir_entry
*pde
;
292 struct ctl_table_header
*sysctl
;
293 struct ctl_table
*sysctl_entry
;
295 const struct proc_ns_operations
*ns_ops
;
296 struct inode vfs_inode
;
299 static inline struct proc_inode
*PROC_I(const struct inode
*inode
)
301 return container_of(inode
, struct proc_inode
, vfs_inode
);
304 static inline struct proc_dir_entry
*PDE(const struct inode
*inode
)
306 return PROC_I(inode
)->pde
;
309 static inline struct net
*PDE_NET(struct proc_dir_entry
*pde
)
311 return pde
->parent
->data
;
314 #include <linux/signal.h>
316 void render_sigset_t(struct seq_file
*m
, const char *header
, sigset_t
*set
);
317 #endif /* _LINUX_PROC_FS_H */