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;
22 extern struct file *alloc_file_pseudo(struct inode *, struct vfsmount *,
23 const char *, int flags, const struct file_operations *);
24 extern struct file *alloc_file_clone(struct file *, int flags,
25 const struct file_operations *);
27 static inline void fput_light(struct file *file, int fput_needed)
38 #define FDPUT_POS_UNLOCK 2
40 static inline void fdput(struct fd fd)
42 if (fd.flags & FDPUT_FPUT)
46 extern struct file *fget(unsigned int fd);
47 extern struct file *fget_raw(unsigned int fd);
48 extern unsigned long __fdget(unsigned int fd);
49 extern unsigned long __fdget_raw(unsigned int fd);
50 extern unsigned long __fdget_pos(unsigned int fd);
51 extern void __f_unlock_pos(struct file *);
53 static inline struct fd __to_fd(unsigned long v)
55 return (struct fd){(struct file *)(v & ~3),v & 3};
58 static inline struct fd fdget(unsigned int fd)
60 return __to_fd(__fdget(fd));
63 static inline struct fd fdget_raw(unsigned int fd)
65 return __to_fd(__fdget_raw(fd));
68 static inline struct fd fdget_pos(int fd)
70 return __to_fd(__fdget_pos(fd));
73 static inline void fdput_pos(struct fd f)
75 if (f.flags & FDPUT_POS_UNLOCK)
76 __f_unlock_pos(f.file);
80 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
81 extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
82 extern void set_close_on_exec(unsigned int fd, int flag);
83 extern bool get_close_on_exec(unsigned int fd);
84 extern int get_unused_fd_flags(unsigned flags);
85 extern void put_unused_fd(unsigned int fd);
87 extern void fd_install(unsigned int fd, struct file *file);
89 extern void flush_delayed_fput(void);
90 extern void __fput_sync(struct file *);
92 #endif /* __LINUX_FILE_H */