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 drop_file_write_access(struct file *file);
  16
  17 struct file_operations;
  18 struct vfsmount;
  19 struct dentry;
  20 struct path;
  21 extern struct file *alloc_file(struct path *, fmode_t mode,
  22         const struct file_operations *fop);
  23
  24 static inline void fput_light(struct file *file, int fput_needed)
  25 {
  26         if (fput_needed)
  27                 fput(file);
  28 }
  29
  30 extern struct file *fget(unsigned int fd);
  31 extern struct file *fget_light(unsigned int fd, int *fput_needed);
  32 extern struct file *fget_raw(unsigned int fd);
  33 extern struct file *fget_raw_light(unsigned int fd, int *fput_needed);
  34 extern void set_close_on_exec(unsigned int fd, int flag);
  35 extern void put_filp(struct file *);
  36 extern int alloc_fd(unsigned start, unsigned flags);
  37 extern int get_unused_fd(void);
  38 #define get_unused_fd_flags(flags) alloc_fd(0, (flags))
  39 extern void put_unused_fd(unsigned int fd);
  40
  41 extern void fd_install(unsigned int fd, struct file *file);
  42
  43 #endif /* __LINUX_FILE_H */