Linux核心数据结构--file

每个打开的文件、套接口都用此结构表示。

struct file {

  mode_t f_mode;

  loff_t f_pos;

  unsigned short f_flags;

  unsigned short f_count;

  unsigned long f_reada, f_ramax, f_raend, f_ralen, f_rawin;

  struct file *f_next, *f_prev;

  int f_owner;         /* pid or -pgrp where SIGIO should be sent */

  struct inode * f_inode;

  struct file_operations * f_op;

  unsigned long f_version;

  void *private_data;  /* needed for tty driver, and maybe others */

};