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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Wrapper functions for accessing the file_struct fd array. | |
4 | */ | |
5 | ||
6 | #ifndef __LINUX_FILE_H | |
7 | #define __LINUX_FILE_H | |
8 | ||
1da177e4 | 9 | #include <linux/compiler.h> |
0c9e63fd | 10 | #include <linux/types.h> |
9f3acc31 | 11 | #include <linux/posix_types.h> |
1da177e4 | 12 | |
9f3acc31 | 13 | struct file; |
8b7d91eb | 14 | |
b3c97528 | 15 | extern void fput(struct file *); |
1da177e4 | 16 | |
ce8d2cdf DH |
17 | struct file_operations; |
18 | struct vfsmount; | |
19 | struct dentry; | |
2c48b9c4 | 20 | struct path; |
a4141d7c | 21 | extern struct file *alloc_file(const struct path *, fmode_t mode, |
2c48b9c4 | 22 | const struct file_operations *fop); |
ce8d2cdf | 23 | |
1da177e4 LT |
24 | static inline void fput_light(struct file *file, int fput_needed) |
25 | { | |
c2b3e74b | 26 | if (fput_needed) |
1da177e4 LT |
27 | fput(file); |
28 | } | |
29 | ||
a5b470ba AV |
30 | struct fd { |
31 | struct file *file; | |
9c225f26 | 32 | unsigned int flags; |
a5b470ba | 33 | }; |
9c225f26 LT |
34 | #define FDPUT_FPUT 1 |
35 | #define FDPUT_POS_UNLOCK 2 | |
a5b470ba AV |
36 | |
37 | static inline void fdput(struct fd fd) | |
38 | { | |
9c225f26 | 39 | if (fd.flags & FDPUT_FPUT) |
a5b470ba AV |
40 | fput(fd.file); |
41 | } | |
42 | ||
b3c97528 | 43 | extern struct file *fget(unsigned int fd); |
bd2a31d5 AV |
44 | extern struct file *fget_raw(unsigned int fd); |
45 | extern unsigned long __fdget(unsigned int fd); | |
46 | extern unsigned long __fdget_raw(unsigned int fd); | |
47 | extern unsigned long __fdget_pos(unsigned int fd); | |
63b6df14 | 48 | extern void __f_unlock_pos(struct file *); |
a5b470ba | 49 | |
bd2a31d5 | 50 | static inline struct fd __to_fd(unsigned long v) |
a5b470ba | 51 | { |
bd2a31d5 | 52 | return (struct fd){(struct file *)(v & ~3),v & 3}; |
a5b470ba AV |
53 | } |
54 | ||
bd2a31d5 AV |
55 | static inline struct fd fdget(unsigned int fd) |
56 | { | |
57 | return __to_fd(__fdget(fd)); | |
58 | } | |
2903ff01 | 59 | |
a5b470ba AV |
60 | static inline struct fd fdget_raw(unsigned int fd) |
61 | { | |
bd2a31d5 | 62 | return __to_fd(__fdget_raw(fd)); |
a5b470ba AV |
63 | } |
64 | ||
63b6df14 AV |
65 | static inline struct fd fdget_pos(int fd) |
66 | { | |
67 | return __to_fd(__fdget_pos(fd)); | |
68 | } | |
69 | ||
70 | static inline void fdput_pos(struct fd f) | |
71 | { | |
72 | if (f.flags & FDPUT_POS_UNLOCK) | |
73 | __f_unlock_pos(f.file); | |
74 | fdput(f); | |
75 | } | |
76 | ||
fe17f22d | 77 | extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); |
8280d161 | 78 | extern int replace_fd(unsigned fd, struct file *file, unsigned flags); |
b3c97528 | 79 | extern void set_close_on_exec(unsigned int fd, int flag); |
fe17f22d | 80 | extern bool get_close_on_exec(unsigned int fd); |
1da177e4 | 81 | extern void put_filp(struct file *); |
1a7bd226 | 82 | extern int get_unused_fd_flags(unsigned flags); |
b3c97528 | 83 | extern void put_unused_fd(unsigned int fd); |
1da177e4 | 84 | |
b3c97528 | 85 | extern void fd_install(unsigned int fd, struct file *file); |
1da177e4 | 86 | |
4a9d4b02 AV |
87 | extern void flush_delayed_fput(void); |
88 | extern void __fput_sync(struct file *); | |
89 | ||
1da177e4 | 90 | #endif /* __LINUX_FILE_H */ |