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1 /* SPDX-License-Identifier: GPL-2.0 */
3 * The proc filesystem constants/structures
5 #ifndef _LINUX_PROC_FS_H
6 #define _LINUX_PROC_FS_H
8 #include <linux/types.h>
11 struct proc_dir_entry
;
13 struct seq_operations
;
17 typedef int (*proc_write_t
)(struct file
*, char *, size_t);
19 extern void proc_root_init(void);
20 extern void proc_flush_task(struct task_struct
*);
22 extern struct proc_dir_entry
*proc_symlink(const char *,
23 struct proc_dir_entry
*, const char *);
24 extern struct proc_dir_entry
*proc_mkdir(const char *, struct proc_dir_entry
*);
25 extern struct proc_dir_entry
*proc_mkdir_data(const char *, umode_t
,
26 struct proc_dir_entry
*, void *);
27 extern struct proc_dir_entry
*proc_mkdir_mode(const char *, umode_t
,
28 struct proc_dir_entry
*);
29 struct proc_dir_entry
*proc_create_mount_point(const char *name
);
31 struct proc_dir_entry
*proc_create_seq_private(const char *name
, umode_t mode
,
32 struct proc_dir_entry
*parent
, const struct seq_operations
*ops
,
33 unsigned int state_size
, void *data
);
34 #define proc_create_seq_data(name, mode, parent, ops, data) \
35 proc_create_seq_private(name, mode, parent, ops, 0, data)
36 #define proc_create_seq(name, mode, parent, ops) \
37 proc_create_seq_private(name, mode, parent, ops, 0, NULL)
38 struct proc_dir_entry
*proc_create_single_data(const char *name
, umode_t mode
,
39 struct proc_dir_entry
*parent
,
40 int (*show
)(struct seq_file
*, void *), void *data
);
41 #define proc_create_single(name, mode, parent, show) \
42 proc_create_single_data(name, mode, parent, show, NULL)
44 extern struct proc_dir_entry
*proc_create_data(const char *, umode_t
,
45 struct proc_dir_entry
*,
46 const struct file_operations
*,
49 struct proc_dir_entry
*proc_create(const char *name
, umode_t mode
, struct proc_dir_entry
*parent
, const struct file_operations
*proc_fops
);
50 extern void proc_set_size(struct proc_dir_entry
*, loff_t
);
51 extern void proc_set_user(struct proc_dir_entry
*, kuid_t
, kgid_t
);
52 extern void *PDE_DATA(const struct inode
*);
53 extern void *proc_get_parent_data(const struct inode
*);
54 extern void proc_remove(struct proc_dir_entry
*);
55 extern void remove_proc_entry(const char *, struct proc_dir_entry
*);
56 extern int remove_proc_subtree(const char *, struct proc_dir_entry
*);
58 struct proc_dir_entry
*proc_create_net_data(const char *name
, umode_t mode
,
59 struct proc_dir_entry
*parent
, const struct seq_operations
*ops
,
60 unsigned int state_size
, void *data
);
61 #define proc_create_net(name, mode, parent, state_size, ops) \
62 proc_create_net_data(name, mode, parent, state_size, ops, NULL)
63 struct proc_dir_entry
*proc_create_net_single(const char *name
, umode_t mode
,
64 struct proc_dir_entry
*parent
,
65 int (*show
)(struct seq_file
*, void *), void *data
);
66 struct proc_dir_entry
*proc_create_net_data_write(const char *name
, umode_t mode
,
67 struct proc_dir_entry
*parent
,
68 const struct seq_operations
*ops
,
70 unsigned int state_size
, void *data
);
71 struct proc_dir_entry
*proc_create_net_single_write(const char *name
, umode_t mode
,
72 struct proc_dir_entry
*parent
,
73 int (*show
)(struct seq_file
*, void *),
77 #else /* CONFIG_PROC_FS */
79 static inline void proc_root_init(void)
83 static inline void proc_flush_task(struct task_struct
*task
)
87 static inline struct proc_dir_entry
*proc_symlink(const char *name
,
88 struct proc_dir_entry
*parent
,const char *dest
) { return NULL
;}
89 static inline struct proc_dir_entry
*proc_mkdir(const char *name
,
90 struct proc_dir_entry
*parent
) {return NULL
;}
91 static inline struct proc_dir_entry
*proc_create_mount_point(const char *name
) { return NULL
; }
92 static inline struct proc_dir_entry
*proc_mkdir_data(const char *name
,
93 umode_t mode
, struct proc_dir_entry
*parent
, void *data
) { return NULL
; }
94 static inline struct proc_dir_entry
*proc_mkdir_mode(const char *name
,
95 umode_t mode
, struct proc_dir_entry
*parent
) { return NULL
; }
96 #define proc_create_seq_private(name, mode, parent, ops, size, data) ({NULL;})
97 #define proc_create_seq_data(name, mode, parent, ops, data) ({NULL;})
98 #define proc_create_seq(name, mode, parent, ops) ({NULL;})
99 #define proc_create_single(name, mode, parent, show) ({NULL;})
100 #define proc_create_single_data(name, mode, parent, show, data) ({NULL;})
101 #define proc_create(name, mode, parent, proc_fops) ({NULL;})
102 #define proc_create_data(name, mode, parent, proc_fops, data) ({NULL;})
104 static inline void proc_set_size(struct proc_dir_entry
*de
, loff_t size
) {}
105 static inline void proc_set_user(struct proc_dir_entry
*de
, kuid_t uid
, kgid_t gid
) {}
106 static inline void *PDE_DATA(const struct inode
*inode
) {BUG(); return NULL
;}
107 static inline void *proc_get_parent_data(const struct inode
*inode
) { BUG(); return NULL
; }
109 static inline void proc_remove(struct proc_dir_entry
*de
) {}
110 #define remove_proc_entry(name, parent) do {} while (0)
111 static inline int remove_proc_subtree(const char *name
, struct proc_dir_entry
*parent
) { return 0; }
113 #define proc_create_net_data(name, mode, parent, ops, state_size, data) ({NULL;})
114 #define proc_create_net(name, mode, parent, state_size, ops) ({NULL;})
115 #define proc_create_net_single(name, mode, parent, show, data) ({NULL;})
117 #endif /* CONFIG_PROC_FS */
121 static inline struct proc_dir_entry
*proc_net_mkdir(
122 struct net
*net
, const char *name
, struct proc_dir_entry
*parent
)
124 return proc_mkdir_data(name
, 0, parent
, net
);
128 int open_related_ns(struct ns_common
*ns
,
129 struct ns_common
*(*get_ns
)(struct ns_common
*ns
));
131 /* get the associated pid namespace for a file in procfs */
132 static inline struct pid_namespace
*proc_pid_ns(const struct inode
*inode
)
134 return inode
->i_sb
->s_fs_info
;
137 #endif /* _LINUX_PROC_FS_H */