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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); |
c088e31d | 23 | extern struct file *get_empty_filp(void); |
ce8d2cdf | 24 | |
1da177e4 LT |
25 | static inline void fput_light(struct file *file, int fput_needed) |
26 | { | |
c2b3e74b | 27 | if (fput_needed) |
1da177e4 LT |
28 | fput(file); |
29 | } | |
30 | ||
a5b470ba AV |
31 | struct fd { |
32 | struct file *file; | |
9c225f26 | 33 | unsigned int flags; |
a5b470ba | 34 | }; |
9c225f26 LT |
35 | #define FDPUT_FPUT 1 |
36 | #define FDPUT_POS_UNLOCK 2 | |
a5b470ba AV |
37 | |
38 | static inline void fdput(struct fd fd) | |
39 | { | |
9c225f26 | 40 | if (fd.flags & FDPUT_FPUT) |
a5b470ba AV |
41 | fput(fd.file); |
42 | } | |
43 | ||
b3c97528 | 44 | extern struct file *fget(unsigned int fd); |
bd2a31d5 AV |
45 | extern struct file *fget_raw(unsigned int fd); |
46 | extern unsigned long __fdget(unsigned int fd); | |
47 | extern unsigned long __fdget_raw(unsigned int fd); | |
48 | extern unsigned long __fdget_pos(unsigned int fd); | |
63b6df14 | 49 | extern void __f_unlock_pos(struct file *); |
a5b470ba | 50 | |
bd2a31d5 | 51 | static inline struct fd __to_fd(unsigned long v) |
a5b470ba | 52 | { |
bd2a31d5 | 53 | return (struct fd){(struct file *)(v & ~3),v & 3}; |
a5b470ba AV |
54 | } |
55 | ||
bd2a31d5 AV |
56 | static inline struct fd fdget(unsigned int fd) |
57 | { | |
58 | return __to_fd(__fdget(fd)); | |
59 | } | |
2903ff01 | 60 | |
a5b470ba AV |
61 | static inline struct fd fdget_raw(unsigned int fd) |
62 | { | |
bd2a31d5 | 63 | return __to_fd(__fdget_raw(fd)); |
a5b470ba AV |
64 | } |
65 | ||
63b6df14 AV |
66 | static inline struct fd fdget_pos(int fd) |
67 | { | |
68 | return __to_fd(__fdget_pos(fd)); | |
69 | } | |
70 | ||
71 | static inline void fdput_pos(struct fd f) | |
72 | { | |
73 | if (f.flags & FDPUT_POS_UNLOCK) | |
74 | __f_unlock_pos(f.file); | |
75 | fdput(f); | |
76 | } | |
77 | ||
fe17f22d | 78 | extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); |
8280d161 | 79 | extern int replace_fd(unsigned fd, struct file *file, unsigned flags); |
b3c97528 | 80 | extern void set_close_on_exec(unsigned int fd, int flag); |
fe17f22d | 81 | extern bool get_close_on_exec(unsigned int fd); |
1da177e4 | 82 | extern void put_filp(struct file *); |
1a7bd226 | 83 | extern int get_unused_fd_flags(unsigned flags); |
b3c97528 | 84 | extern void put_unused_fd(unsigned int fd); |
1da177e4 | 85 | |
b3c97528 | 86 | extern void fd_install(unsigned int fd, struct file *file); |
1da177e4 | 87 | |
4a9d4b02 AV |
88 | extern void flush_delayed_fput(void); |
89 | extern void __fput_sync(struct file *); | |
90 | ||
1da177e4 | 91 | #endif /* __LINUX_FILE_H */ |