include/linux/file.h

   1 /*
   2  * Wrapper functions for accessing the file_struct fd array.
   3  */
   4
   5 #ifndef __LINUX_FILE_H
   6 #define __LINUX_FILE_H
   7
   8 #include <linux/compiler.h>
   9 #include <linux/types.h>
  10 #include <linux/posix_types.h>
  11
  12 struct file;
  13
  14 extern void __fput(struct file *);
  15 extern void fput(struct file *);
  16 extern void drop_file_write_access(struct file *file);
  17
  18 struct file_operations;
  19 struct vfsmount;
  20 struct dentry;
  21 extern int init_file(struct file *, struct vfsmount *mnt,
  22                 struct dentry *dentry, mode_t mode,
  23                 const struct file_operations *fop);
  24 extern struct file *alloc_file(struct vfsmount *, struct dentry *dentry,
  25                 mode_t mode, const struct file_operations *fop);
  26
  27 static inline void fput_light(struct file *file, int fput_needed)
  28 {
  29         if (unlikely(fput_needed))
  30                 fput(file);
  31 }
  32
  33 extern struct file *fget(unsigned int fd);
  34 extern struct file *fget_light(unsigned int fd, int *fput_needed);
  35 extern void set_close_on_exec(unsigned int fd, int flag);
  36 extern void put_filp(struct file *);
  37 extern int alloc_fd(unsigned start, unsigned flags);
  38 extern int get_unused_fd(void);
  39 #define get_unused_fd_flags(flags) alloc_fd(0, (flags))
  40 extern void put_unused_fd(unsigned int fd);
  41
  42 extern void fd_install(unsigned int fd, struct file *file);
  43
  44 #endif /* __LINUX_FILE_H */