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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/file.h
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Wrapper functions for accessing the file_struct fd array.
9 #include <linux/compiler.h>
10 #include <linux/types.h>
11 #include <linux/posix_types.h>
15 extern void fput(struct file
*);
17 struct file_operations
;
21 extern struct file
*alloc_file(const struct path
*, fmode_t mode
,
22 const struct file_operations
*fop
);
23 extern struct file
*get_empty_filp(void);
25 static inline void fput_light(struct file
*file
, int fput_needed
)
36 #define FDPUT_POS_UNLOCK 2
38 static inline void fdput(struct fd fd
)
40 if (fd
.flags
& FDPUT_FPUT
)
44 extern struct file
*fget(unsigned int fd
);
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
);
49 extern void __f_unlock_pos(struct file
*);
51 static inline struct fd
__to_fd(unsigned long v
)
53 return (struct fd
){(struct file
*)(v
& ~3),v
& 3};
56 static inline struct fd
fdget(unsigned int fd
)
58 return __to_fd(__fdget(fd
));
61 static inline struct fd
fdget_raw(unsigned int fd
)
63 return __to_fd(__fdget_raw(fd
));
66 static inline struct fd
fdget_pos(int fd
)
68 return __to_fd(__fdget_pos(fd
));
71 static inline void fdput_pos(struct fd f
)
73 if (f
.flags
& FDPUT_POS_UNLOCK
)
74 __f_unlock_pos(f
.file
);
78 extern int f_dupfd(unsigned int from
, struct file
*file
, unsigned flags
);
79 extern int replace_fd(unsigned fd
, struct file
*file
, unsigned flags
);
80 extern void set_close_on_exec(unsigned int fd
, int flag
);
81 extern bool get_close_on_exec(unsigned int fd
);
82 extern void put_filp(struct file
*);
83 extern int get_unused_fd_flags(unsigned flags
);
84 extern void put_unused_fd(unsigned int fd
);
86 extern void fd_install(unsigned int fd
, struct file
*file
);
88 extern void flush_delayed_fput(void);
89 extern void __fput_sync(struct file
*);
91 #endif /* __LINUX_FILE_H */