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 struct path;
  22 extern struct file *alloc_file(struct path *, fmode_t mode,
  23         const struct file_operations *fop);
  24
  25 static inline void fput_light(struct file *file, int fput_needed)
  26 {
  27         if (unlikely(fput_needed))
  28                 fput(file);
  29 }
  30
  31 extern struct file *fget(unsigned int fd);
  32 extern struct file *fget_light(unsigned int fd, int *fput_needed);
  33 extern void set_close_on_exec(unsigned int fd, int flag);
  34 extern void put_filp(struct file *);
  35 extern int alloc_fd(unsigned start, unsigned flags);
  36 extern int get_unused_fd(void);
  37 #define get_unused_fd_flags(flags) alloc_fd(0, (flags))
  38 extern void put_unused_fd(unsigned int fd);
  39
  40 extern void fd_install(unsigned int fd, struct file *file);
  41
  42 #endif /* __LINUX_FILE_H */