Linux 4.6-rc6
[cris-mirror.git] / include / linux / file.h
blobf87d30882a249d8361425fb668b3f71310832256
1 /*
2 * Wrapper functions for accessing the file_struct fd array.
3 */
5 #ifndef __LINUX_FILE_H
6 #define __LINUX_FILE_H
8 #include <linux/compiler.h>
9 #include <linux/types.h>
10 #include <linux/posix_types.h>
12 struct file;
14 extern void fput(struct file *);
16 struct file_operations;
17 struct vfsmount;
18 struct dentry;
19 struct path;
20 extern struct file *alloc_file(struct path *, fmode_t mode,
21 const struct file_operations *fop);
23 static inline void fput_light(struct file *file, int fput_needed)
25 if (fput_needed)
26 fput(file);
29 struct fd {
30 struct file *file;
31 unsigned int flags;
33 #define FDPUT_FPUT 1
34 #define FDPUT_POS_UNLOCK 2
36 static inline void fdput(struct fd fd)
38 if (fd.flags & FDPUT_FPUT)
39 fput(fd.file);
42 extern struct file *fget(unsigned int fd);
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);
48 static inline struct fd __to_fd(unsigned long v)
50 return (struct fd){(struct file *)(v & ~3),v & 3};
53 static inline struct fd fdget(unsigned int fd)
55 return __to_fd(__fdget(fd));
58 static inline struct fd fdget_raw(unsigned int fd)
60 return __to_fd(__fdget_raw(fd));
63 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
64 extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
65 extern void set_close_on_exec(unsigned int fd, int flag);
66 extern bool get_close_on_exec(unsigned int fd);
67 extern void put_filp(struct file *);
68 extern int get_unused_fd_flags(unsigned flags);
69 extern void put_unused_fd(unsigned int fd);
71 extern void fd_install(unsigned int fd, struct file *file);
73 extern void flush_delayed_fput(void);
74 extern void __fput_sync(struct file *);
76 #endif /* __LINUX_FILE_H */