#ifndef __SEQ_FILE_NET_H__
  #define __SEQ_FILE_NET_H__
  
  #include <linux/seq_file.h>
  
  struct net;
  extern struct net init_net;
  
  struct seq_net_private {
  #ifdef CONFIG_NET_NS
  	struct net *net;
  #endif
  };
  
  int seq_open_net(struct inode *, struct file *,
  		 const struct seq_operations *, int);

  int single_open_net(struct inode *, struct file *file,
  		int (*show)(struct seq_file *, void *));

  int seq_release_net(struct inode *, struct file *);

  int single_release_net(struct inode *, struct file *);

  static inline struct net *seq_file_net(struct seq_file *seq)
  {
  #ifdef CONFIG_NET_NS
  	return ((struct seq_net_private *)seq->private)->net;
  #else
  	return &init_net;
  #endif
  }
  
  #endif