blob: a20259e248a5ac6d641713512d1891e05154abcd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Wrapper functions for accessing the file_struct fd array.
3 */
4
5#ifndef __LINUX_FILE_H
6#define __LINUX_FILE_H
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/compiler.h>
Eric Dumazet0c9e63f2006-03-23 03:00:12 -08009#include <linux/types.h>
Al Viro9f3acc32008-04-24 07:44:08 -040010#include <linux/posix_types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
Al Viro9f3acc32008-04-24 07:44:08 -040012struct file;
Christoph Lameter8b7d91e2006-12-06 20:32:52 -080013
Harvey Harrisonb3c97522008-02-13 15:03:15 -080014extern void __fput(struct file *);
15extern void fput(struct file *);
Dave Hansenaceaf782008-02-15 14:37:31 -080016extern void drop_file_write_access(struct file *file);
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
Dave Hansence8d2cd2007-10-16 23:31:13 -070018struct file_operations;
19struct vfsmount;
20struct dentry;
21extern int init_file(struct file *, struct vfsmount *mnt,
22 struct dentry *dentry, mode_t mode,
23 const struct file_operations *fop);
24extern struct file *alloc_file(struct vfsmount *, struct dentry *dentry,
25 mode_t mode, const struct file_operations *fop);
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027static inline void fput_light(struct file *file, int fput_needed)
28{
29 if (unlikely(fput_needed))
30 fput(file);
31}
32
Harvey Harrisonb3c97522008-02-13 15:03:15 -080033extern struct file *fget(unsigned int fd);
34extern struct file *fget_light(unsigned int fd, int *fput_needed);
35extern void set_close_on_exec(unsigned int fd, int flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036extern void put_filp(struct file *);
Al Viro1027abe2008-07-30 04:13:04 -040037extern int alloc_fd(unsigned start, unsigned flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038extern int get_unused_fd(void);
Al Viro1027abe2008-07-30 04:13:04 -040039#define get_unused_fd_flags(flags) alloc_fd(0, (flags))
Harvey Harrisonb3c97522008-02-13 15:03:15 -080040extern void put_unused_fd(unsigned int fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Harvey Harrisonb3c97522008-02-13 15:03:15 -080042extern void fd_install(unsigned int fd, struct file *file);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#endif /* __LINUX_FILE_H */