/*
   * xfrm_proc.c
   *
   * Copyright (C)2006-2007 USAGI/WIDE Project
   *
   * Authors:	Masahide NAKAMURA <nakam@linux-ipv6.org>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  #include <linux/proc_fs.h>
  #include <linux/seq_file.h>

  #include <linux/export.h>

  #include <net/snmp.h>
  #include <net/xfrm.h>

  static const struct snmp_mib xfrm_mib_list[] = {

  	SNMP_MIB_ITEM("XfrmInError", LINUX_MIB_XFRMINERROR),
  	SNMP_MIB_ITEM("XfrmInBufferError", LINUX_MIB_XFRMINBUFFERERROR),
  	SNMP_MIB_ITEM("XfrmInHdrError", LINUX_MIB_XFRMINHDRERROR),
  	SNMP_MIB_ITEM("XfrmInNoStates", LINUX_MIB_XFRMINNOSTATES),
  	SNMP_MIB_ITEM("XfrmInStateProtoError", LINUX_MIB_XFRMINSTATEPROTOERROR),
  	SNMP_MIB_ITEM("XfrmInStateModeError", LINUX_MIB_XFRMINSTATEMODEERROR),

  	SNMP_MIB_ITEM("XfrmInStateSeqError", LINUX_MIB_XFRMINSTATESEQERROR),

  	SNMP_MIB_ITEM("XfrmInStateExpired", LINUX_MIB_XFRMINSTATEEXPIRED),
  	SNMP_MIB_ITEM("XfrmInStateMismatch", LINUX_MIB_XFRMINSTATEMISMATCH),
  	SNMP_MIB_ITEM("XfrmInStateInvalid", LINUX_MIB_XFRMINSTATEINVALID),
  	SNMP_MIB_ITEM("XfrmInTmplMismatch", LINUX_MIB_XFRMINTMPLMISMATCH),
  	SNMP_MIB_ITEM("XfrmInNoPols", LINUX_MIB_XFRMINNOPOLS),
  	SNMP_MIB_ITEM("XfrmInPolBlock", LINUX_MIB_XFRMINPOLBLOCK),
  	SNMP_MIB_ITEM("XfrmInPolError", LINUX_MIB_XFRMINPOLERROR),
  	SNMP_MIB_ITEM("XfrmOutError", LINUX_MIB_XFRMOUTERROR),
  	SNMP_MIB_ITEM("XfrmOutBundleGenError", LINUX_MIB_XFRMOUTBUNDLEGENERROR),
  	SNMP_MIB_ITEM("XfrmOutBundleCheckError", LINUX_MIB_XFRMOUTBUNDLECHECKERROR),
  	SNMP_MIB_ITEM("XfrmOutNoStates", LINUX_MIB_XFRMOUTNOSTATES),
  	SNMP_MIB_ITEM("XfrmOutStateProtoError", LINUX_MIB_XFRMOUTSTATEPROTOERROR),
  	SNMP_MIB_ITEM("XfrmOutStateModeError", LINUX_MIB_XFRMOUTSTATEMODEERROR),

  	SNMP_MIB_ITEM("XfrmOutStateSeqError", LINUX_MIB_XFRMOUTSTATESEQERROR),

  	SNMP_MIB_ITEM("XfrmOutStateExpired", LINUX_MIB_XFRMOUTSTATEEXPIRED),
  	SNMP_MIB_ITEM("XfrmOutPolBlock", LINUX_MIB_XFRMOUTPOLBLOCK),
  	SNMP_MIB_ITEM("XfrmOutPolDead", LINUX_MIB_XFRMOUTPOLDEAD),
  	SNMP_MIB_ITEM("XfrmOutPolError", LINUX_MIB_XFRMOUTPOLERROR),

  	SNMP_MIB_ITEM("XfrmFwdHdrError", LINUX_MIB_XFRMFWDHDRERROR),

  	SNMP_MIB_SENTINEL
  };

  static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)
  {

  	struct net *net = seq->private;

  	int i;
  	for (i=0; xfrm_mib_list[i].name; i++)
  		seq_printf(seq, "%-24s\t%lu
  ", xfrm_mib_list[i].name,

  			   snmp_fold_field((void __percpu **)
  					   net->mib.xfrm_statistics,

  					   xfrm_mib_list[i].entry));

  	return 0;
  }
  
  static int xfrm_statistics_seq_open(struct inode *inode, struct file *file)
  {

  	return single_open_net(inode, file, xfrm_statistics_seq_show);

  }

  static const struct file_operations xfrm_statistics_seq_fops = {

  	.owner	 = THIS_MODULE,
  	.open	 = xfrm_statistics_seq_open,
  	.read	 = seq_read,
  	.llseek	 = seq_lseek,

  	.release = single_release_net,

  };

  int __net_init xfrm_proc_init(struct net *net)

  {

  	if (!proc_net_fops_create(net, "xfrm_stat", S_IRUGO,

  				  &xfrm_statistics_seq_fops))

  		return -ENOMEM;
  	return 0;
  }

  void xfrm_proc_fini(struct net *net)
  {
  	proc_net_remove(net, "xfrm_stat");

  }