net/xfrm/xfrm_proc.c

   1 /*
   2  * xfrm_proc.c
   3  *
   4  * Copyright (C)2006-2007 USAGI/WIDE Project
   5  *
   6  * Authors:     Masahide NAKAMURA <nakam@linux-ipv6.org>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version
  11  * 2 of the License, or (at your option) any later version.
  12  */
  13 #include <linux/proc_fs.h>
  14 #include <linux/seq_file.h>
  15 #include <linux/export.h>
  16 #include <net/snmp.h>
  17 #include <net/xfrm.h>
  18
  19 static const struct snmp_mib xfrm_mib_list[] = {
  20         SNMP_MIB_ITEM("XfrmInError", LINUX_MIB_XFRMINERROR),
  21         SNMP_MIB_ITEM("XfrmInBufferError", LINUX_MIB_XFRMINBUFFERERROR),
  22         SNMP_MIB_ITEM("XfrmInHdrError", LINUX_MIB_XFRMINHDRERROR),
  23         SNMP_MIB_ITEM("XfrmInNoStates", LINUX_MIB_XFRMINNOSTATES),
  24         SNMP_MIB_ITEM("XfrmInStateProtoError", LINUX_MIB_XFRMINSTATEPROTOERROR),
  25         SNMP_MIB_ITEM("XfrmInStateModeError", LINUX_MIB_XFRMINSTATEMODEERROR),
  26         SNMP_MIB_ITEM("XfrmInStateSeqError", LINUX_MIB_XFRMINSTATESEQERROR),
  27         SNMP_MIB_ITEM("XfrmInStateExpired", LINUX_MIB_XFRMINSTATEEXPIRED),
  28         SNMP_MIB_ITEM("XfrmInStateMismatch", LINUX_MIB_XFRMINSTATEMISMATCH),
  29         SNMP_MIB_ITEM("XfrmInStateInvalid", LINUX_MIB_XFRMINSTATEINVALID),
  30         SNMP_MIB_ITEM("XfrmInTmplMismatch", LINUX_MIB_XFRMINTMPLMISMATCH),
  31         SNMP_MIB_ITEM("XfrmInNoPols", LINUX_MIB_XFRMINNOPOLS),
  32         SNMP_MIB_ITEM("XfrmInPolBlock", LINUX_MIB_XFRMINPOLBLOCK),
  33         SNMP_MIB_ITEM("XfrmInPolError", LINUX_MIB_XFRMINPOLERROR),
  34         SNMP_MIB_ITEM("XfrmOutError", LINUX_MIB_XFRMOUTERROR),
  35         SNMP_MIB_ITEM("XfrmOutBundleGenError", LINUX_MIB_XFRMOUTBUNDLEGENERROR),
  36         SNMP_MIB_ITEM("XfrmOutBundleCheckError", LINUX_MIB_XFRMOUTBUNDLECHECKERROR),
  37         SNMP_MIB_ITEM("XfrmOutNoStates", LINUX_MIB_XFRMOUTNOSTATES),
  38         SNMP_MIB_ITEM("XfrmOutStateProtoError", LINUX_MIB_XFRMOUTSTATEPROTOERROR),
  39         SNMP_MIB_ITEM("XfrmOutStateModeError", LINUX_MIB_XFRMOUTSTATEMODEERROR),
  40         SNMP_MIB_ITEM("XfrmOutStateSeqError", LINUX_MIB_XFRMOUTSTATESEQERROR),
  41         SNMP_MIB_ITEM("XfrmOutStateExpired", LINUX_MIB_XFRMOUTSTATEEXPIRED),
  42         SNMP_MIB_ITEM("XfrmOutPolBlock", LINUX_MIB_XFRMOUTPOLBLOCK),
  43         SNMP_MIB_ITEM("XfrmOutPolDead", LINUX_MIB_XFRMOUTPOLDEAD),
  44         SNMP_MIB_ITEM("XfrmOutPolError", LINUX_MIB_XFRMOUTPOLERROR),
  45         SNMP_MIB_ITEM("XfrmFwdHdrError", LINUX_MIB_XFRMFWDHDRERROR),
  46         SNMP_MIB_ITEM("XfrmOutStateInvalid", LINUX_MIB_XFRMOUTSTATEINVALID),
  47         SNMP_MIB_ITEM("XfrmAcquireError", LINUX_MIB_XFRMACQUIREERROR),
  48         SNMP_MIB_SENTINEL
  49 };
  50
  51 static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)
  52 {
  53         unsigned long buff[LINUX_MIB_XFRMMAX];
  54         struct net *net = seq->private;
  55         int i;
  56
  57         memset(buff, 0, sizeof(unsigned long) * LINUX_MIB_XFRMMAX);
  58
  59         snmp_get_cpu_field_batch(buff, xfrm_mib_list,
  60                                  net->mib.xfrm_statistics);
  61         for (i = 0; xfrm_mib_list[i].name; i++)
  62                 seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name,
  63                                                 buff[i]);
  64
  65         return 0;
  66 }
  67
  68 static int xfrm_statistics_seq_open(struct inode *inode, struct file *file)
  69 {
  70         return single_open_net(inode, file, xfrm_statistics_seq_show);
  71 }
  72
  73 static const struct file_operations xfrm_statistics_seq_fops = {
  74         .owner   = THIS_MODULE,
  75         .open    = xfrm_statistics_seq_open,
  76         .read    = seq_read,
  77         .llseek  = seq_lseek,
  78         .release = single_release_net,
  79 };
  80
  81 int __net_init xfrm_proc_init(struct net *net)
  82 {
  83         if (!proc_create("xfrm_stat", S_IRUGO, net->proc_net,
  84                          &xfrm_statistics_seq_fops))
  85                 return -ENOMEM;
  86         return 0;
  87 }
  88
  89 void xfrm_proc_fini(struct net *net)
  90 {
  91         remove_proc_entry("xfrm_stat", net->proc_net);
  92 }