Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Wrapper functions for accessing the file_struct fd array.
3 */
4
5#ifndef __LINUX_FILE_H
6#define __LINUX_FILE_H
7
8#include <linux/compiler.h>
9#include <linux/types.h>
10#include <linux/posix_types.h>
11
12struct file;
13
14extern void fput(struct file *);
15
16struct file_operations;
17struct vfsmount;
18struct dentry;
19struct path;
20extern struct file *alloc_file(const struct path *, fmode_t mode,
21 const struct file_operations *fop);
22
23static inline void fput_light(struct file *file, int fput_needed)
24{
25 if (fput_needed)
26 fput(file);
27}
28
29struct fd {
30 struct file *file;
31 unsigned int flags;
32};
33#define FDPUT_FPUT 1
34#define FDPUT_POS_UNLOCK 2
35
36static inline void fdput(struct fd fd)
37{
38 if (fd.flags & FDPUT_FPUT)
39 fput(fd.file);
40}
41
42extern struct file *fget(unsigned int fd);
43extern struct file *fget_raw(unsigned int fd);
44extern unsigned long __fdget(unsigned int fd);
45extern unsigned long __fdget_raw(unsigned int fd);
46extern unsigned long __fdget_pos(unsigned int fd);
47extern void __f_unlock_pos(struct file *);
48
49static inline struct fd __to_fd(unsigned long v)
50{
51 return (struct fd){(struct file *)(v & ~3),v & 3};
52}
53
54static inline struct fd fdget(unsigned int fd)
55{
56 return __to_fd(__fdget(fd));
57}
58
59static inline struct fd fdget_raw(unsigned int fd)
60{
61 return __to_fd(__fdget_raw(fd));
62}
63
64static inline struct fd fdget_pos(int fd)
65{
66 return __to_fd(__fdget_pos(fd));
67}
68
69static inline void fdput_pos(struct fd f)
70{
71 if (f.flags & FDPUT_POS_UNLOCK)
72 __f_unlock_pos(f.file);
73 fdput(f);
74}
75
76extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
77extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
78extern void set_close_on_exec(unsigned int fd, int flag);
79extern bool get_close_on_exec(unsigned int fd);
80extern void put_filp(struct file *);
81extern int get_unused_fd_flags(unsigned flags);
82extern void put_unused_fd(unsigned int fd);
83
84extern void fd_install(unsigned int fd, struct file *file);
85
86extern void flush_delayed_fput(void);
87extern void __fput_sync(struct file *);
88
89#endif /* __LINUX_FILE_H */