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>
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
35 * This is not completely implemented yet. The idea is to
36 * create an in-memory tree (like the actual /proc filesystem
37 * tree) of these proc_dir_entries, so that we can dynamically
38 * add new files to /proc.
40 * The "next" pointer creates a linked list of one /proc directory,
41 * while parent/subdir create the directory structure (every
42 * /proc file has a parent, but "subdir" is NULL for all
43 * non-directory entries).
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
);
51 struct proc_dir_entry
{
60 const struct inode_operations
*proc_iops
;
62 * NULL ->proc_fops means "PDE is going away RSN" or
63 * "PDE is just created". In either case, e.g. ->read_proc won't be
64 * called because it's too late or too early, respectively.
66 * If you're allocating ->proc_fops dynamically, save a pointer
69 const struct file_operations
*proc_fops
;
70 struct proc_dir_entry
*next
, *parent
, *subdir
;
72 read_proc_t
*read_proc
;
73 write_proc_t
*write_proc
;
74 atomic_t count
; /* use count */
75 int pde_users
; /* number of callers into module in progress */
76 spinlock_t pde_unload_lock
; /* proc_fops checks and pde_users bumps */
77 struct completion
*pde_unload_completion
;
78 struct list_head pde_openers
; /* who did ->open, but not ->release */
90 struct list_head list
;
97 struct list_head list
;
98 unsigned long long paddr
;
99 unsigned long long size
;
103 #ifdef CONFIG_PROC_FS
105 extern void proc_root_init(void);
107 void proc_flush_task(struct task_struct
*task
);
109 extern struct proc_dir_entry
*create_proc_entry(const char *name
, mode_t mode
,
110 struct proc_dir_entry
*parent
);
111 struct proc_dir_entry
*proc_create_data(const char *name
, mode_t mode
,
112 struct proc_dir_entry
*parent
,
113 const struct file_operations
*proc_fops
,
115 extern void remove_proc_entry(const char *name
, struct proc_dir_entry
*parent
);
117 struct pid_namespace
;
119 extern int pid_ns_prepare_proc(struct pid_namespace
*ns
);
120 extern void pid_ns_release_proc(struct pid_namespace
*ns
);
126 extern 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
, mode_t mode
,
150 struct proc_dir_entry
*parent
);
152 static inline struct proc_dir_entry
*proc_create(const char *name
, mode_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
);
158 static inline struct proc_dir_entry
*create_proc_read_entry(const char *name
,
159 mode_t mode
, struct proc_dir_entry
*base
,
160 read_proc_t
*read_proc
, void * data
)
162 struct proc_dir_entry
*res
=create_proc_entry(name
,mode
,base
);
164 res
->read_proc
=read_proc
;
170 extern struct proc_dir_entry
*proc_net_fops_create(struct net
*net
,
171 const char *name
, mode_t mode
, const struct file_operations
*fops
);
172 extern void proc_net_remove(struct net
*net
, const char *name
);
173 extern struct proc_dir_entry
*proc_net_mkdir(struct net
*net
, const char *name
,
174 struct proc_dir_entry
*parent
);
176 extern struct file
*proc_ns_fget(int fd
);
180 #define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; })
181 static inline void proc_net_remove(struct net
*net
, const char *name
) {}
183 static inline void proc_flush_task(struct task_struct
*task
)
187 static inline struct proc_dir_entry
*create_proc_entry(const char *name
,
188 mode_t mode
, struct proc_dir_entry
*parent
) { return NULL
; }
189 static inline struct proc_dir_entry
*proc_create(const char *name
,
190 mode_t mode
, struct proc_dir_entry
*parent
,
191 const struct file_operations
*proc_fops
)
195 static inline struct proc_dir_entry
*proc_create_data(const char *name
,
196 mode_t mode
, struct proc_dir_entry
*parent
,
197 const struct file_operations
*proc_fops
, void *data
)
201 #define remove_proc_entry(name, parent) do {} while (0)
203 static inline struct proc_dir_entry
*proc_symlink(const char *name
,
204 struct proc_dir_entry
*parent
,const char *dest
) {return NULL
;}
205 static inline struct proc_dir_entry
*proc_mkdir(const char *name
,
206 struct proc_dir_entry
*parent
) {return NULL
;}
207 static inline struct proc_dir_entry
*proc_mkdir_mode(const char *name
,
208 mode_t mode
, struct proc_dir_entry
*parent
) { return NULL
; }
210 static inline struct proc_dir_entry
*create_proc_read_entry(const char *name
,
211 mode_t mode
, struct proc_dir_entry
*base
,
212 read_proc_t
*read_proc
, void * data
) { return NULL
; }
215 static inline void proc_tty_register_driver(struct tty_driver
*driver
) {};
216 static inline void proc_tty_unregister_driver(struct tty_driver
*driver
) {};
218 static inline int pid_ns_prepare_proc(struct pid_namespace
*ns
)
223 static inline void pid_ns_release_proc(struct pid_namespace
*ns
)
227 static inline struct file
*proc_ns_fget(int fd
)
229 return ERR_PTR(-EINVAL
);
232 #endif /* CONFIG_PROC_FS */
234 #if !defined(CONFIG_PROC_KCORE)
236 kclist_add(struct kcore_list
*new, void *addr
, size_t size
, int type
)
240 extern void kclist_add(struct kcore_list
*, void *, size_t, int type
);
244 struct proc_ns_operations
{
247 void *(*get
)(struct task_struct
*task
);
248 void (*put
)(void *ns
);
249 int (*install
)(struct nsproxy
*nsproxy
, 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
;
256 int (*proc_get_link
)(struct inode
*, struct path
*);
257 int (*proc_read
)(struct task_struct
*task
, char *page
);
258 int (*proc_show
)(struct seq_file
*m
,
259 struct pid_namespace
*ns
, struct pid
*pid
,
260 struct task_struct
*task
);
263 struct ctl_table_header
;
270 struct proc_dir_entry
*pde
;
271 struct ctl_table_header
*sysctl
;
272 struct ctl_table
*sysctl_entry
;
274 const struct proc_ns_operations
*ns_ops
;
275 struct inode vfs_inode
;
278 static inline struct proc_inode
*PROC_I(const struct inode
*inode
)
280 return container_of(inode
, struct proc_inode
, vfs_inode
);
283 static inline struct proc_dir_entry
*PDE(const struct inode
*inode
)
285 return PROC_I(inode
)->pde
;
288 static inline struct net
*PDE_NET(struct proc_dir_entry
*pde
)
290 return pde
->parent
->data
;
293 #endif /* _LINUX_PROC_FS_H */