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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Wrapper functions for accessing the file_struct fd array. | |
3 | */ | |
4 | ||
5 | #ifndef __LINUX_FILE_H | |
6 | #define __LINUX_FILE_H | |
7 | ||
1da177e4 | 8 | #include <linux/compiler.h> |
0c9e63fd | 9 | #include <linux/types.h> |
9f3acc31 | 10 | #include <linux/posix_types.h> |
1da177e4 | 11 | |
9f3acc31 | 12 | struct file; |
8b7d91eb | 13 | |
b3c97528 | 14 | extern void fput(struct file *); |
1da177e4 | 15 | |
ce8d2cdf DH |
16 | struct file_operations; |
17 | struct vfsmount; | |
18 | struct dentry; | |
2c48b9c4 AV |
19 | struct path; |
20 | extern struct file *alloc_file(struct path *, fmode_t mode, | |
21 | const struct file_operations *fop); | |
ce8d2cdf | 22 | |
1da177e4 LT |
23 | static inline void fput_light(struct file *file, int fput_needed) |
24 | { | |
c2b3e74b | 25 | if (fput_needed) |
1da177e4 LT |
26 | fput(file); |
27 | } | |
28 | ||
a5b470ba AV |
29 | struct fd { |
30 | struct file *file; | |
9c225f26 | 31 | unsigned int flags; |
a5b470ba | 32 | }; |
9c225f26 LT |
33 | #define FDPUT_FPUT 1 |
34 | #define FDPUT_POS_UNLOCK 2 | |
a5b470ba AV |
35 | |
36 | static inline void fdput(struct fd fd) | |
37 | { | |
9c225f26 | 38 | if (fd.flags & FDPUT_FPUT) |
a5b470ba AV |
39 | fput(fd.file); |
40 | } | |
41 | ||
b3c97528 | 42 | extern struct file *fget(unsigned int fd); |
bd2a31d5 AV |
43 | extern struct file *fget_raw(unsigned int fd); |
44 | extern unsigned long __fdget(unsigned int fd); | |
45 | extern unsigned long __fdget_raw(unsigned int fd); | |
46 | extern unsigned long __fdget_pos(unsigned int fd); | |
63b6df14 | 47 | extern void __f_unlock_pos(struct file *); |
a5b470ba | 48 | |
bd2a31d5 | 49 | static inline struct fd __to_fd(unsigned long v) |
a5b470ba | 50 | { |
bd2a31d5 | 51 | return (struct fd){(struct file *)(v & ~3),v & 3}; |
a5b470ba AV |
52 | } |
53 | ||
bd2a31d5 AV |
54 | static inline struct fd fdget(unsigned int fd) |
55 | { | |
56 | return __to_fd(__fdget(fd)); | |
57 | } | |
2903ff01 | 58 | |
a5b470ba AV |
59 | static inline struct fd fdget_raw(unsigned int fd) |
60 | { | |
bd2a31d5 | 61 | return __to_fd(__fdget_raw(fd)); |
a5b470ba AV |
62 | } |
63 | ||
63b6df14 AV |
64 | static inline struct fd fdget_pos(int fd) |
65 | { | |
66 | return __to_fd(__fdget_pos(fd)); | |
67 | } | |
68 | ||
69 | static 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 | ||
fe17f22d | 76 | extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); |
8280d161 | 77 | extern int replace_fd(unsigned fd, struct file *file, unsigned flags); |
b3c97528 | 78 | extern void set_close_on_exec(unsigned int fd, int flag); |
fe17f22d | 79 | extern bool get_close_on_exec(unsigned int fd); |
1da177e4 | 80 | extern void put_filp(struct file *); |
1a7bd226 | 81 | extern int get_unused_fd_flags(unsigned flags); |
b3c97528 | 82 | extern void put_unused_fd(unsigned int fd); |
1da177e4 | 83 | |
b3c97528 | 84 | extern void fd_install(unsigned int fd, struct file *file); |
1da177e4 | 85 | |
4a9d4b02 AV |
86 | extern void flush_delayed_fput(void); |
87 | extern void __fput_sync(struct file *); | |
88 | ||
1da177e4 | 89 | #endif /* __LINUX_FILE_H */ |