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   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 <net/snmp.h>
  16 #include <net/xfrm.h>
  17
  18 static struct snmp_mib xfrm_mib_list[] = {
  19         SNMP_MIB_ITEM("XfrmInError", LINUX_MIB_XFRMINERROR),
  20         SNMP_MIB_ITEM("XfrmInBufferError", LINUX_MIB_XFRMINBUFFERERROR),
  21         SNMP_MIB_ITEM("XfrmInHdrError", LINUX_MIB_XFRMINHDRERROR),
  22         SNMP_MIB_ITEM("XfrmInNoStates", LINUX_MIB_XFRMINNOSTATES),
  23         SNMP_MIB_ITEM("XfrmInStateProtoError", LINUX_MIB_XFRMINSTATEPROTOERROR),
  24         SNMP_MIB_ITEM("XfrmInStateModeError", LINUX_MIB_XFRMINSTATEMODEERROR),
  25         SNMP_MIB_ITEM("XfrmInSeqOutOfWindow", LINUX_MIB_XFRMINSEQOUTOFWINDOW),
  26         SNMP_MIB_ITEM("XfrmInStateExpired", LINUX_MIB_XFRMINSTATEEXPIRED),
  27         SNMP_MIB_ITEM("XfrmInStateMismatch", LINUX_MIB_XFRMINSTATEMISMATCH),
  28         SNMP_MIB_ITEM("XfrmInStateInvalid", LINUX_MIB_XFRMINSTATEINVALID),
  29         SNMP_MIB_ITEM("XfrmInTmplMismatch", LINUX_MIB_XFRMINTMPLMISMATCH),
  30         SNMP_MIB_ITEM("XfrmInNoPols", LINUX_MIB_XFRMINNOPOLS),
  31         SNMP_MIB_ITEM("XfrmInPolBlock", LINUX_MIB_XFRMINPOLBLOCK),
  32         SNMP_MIB_ITEM("XfrmInPolError", LINUX_MIB_XFRMINPOLERROR),
  33         SNMP_MIB_ITEM("XfrmOutError", LINUX_MIB_XFRMOUTERROR),
  34         SNMP_MIB_ITEM("XfrmOutBundleGenError", LINUX_MIB_XFRMOUTBUNDLEGENERROR),
  35         SNMP_MIB_ITEM("XfrmOutBundleCheckError", LINUX_MIB_XFRMOUTBUNDLECHECKERROR),
  36         SNMP_MIB_ITEM("XfrmOutNoStates", LINUX_MIB_XFRMOUTNOSTATES),
  37         SNMP_MIB_ITEM("XfrmOutStateProtoError", LINUX_MIB_XFRMOUTSTATEPROTOERROR),
  38         SNMP_MIB_ITEM("XfrmOutStateModeError", LINUX_MIB_XFRMOUTSTATEMODEERROR),
  39         SNMP_MIB_ITEM("XfrmOutStateExpired", LINUX_MIB_XFRMOUTSTATEEXPIRED),
  40         SNMP_MIB_ITEM("XfrmOutPolBlock", LINUX_MIB_XFRMOUTPOLBLOCK),
  41         SNMP_MIB_ITEM("XfrmOutPolDead", LINUX_MIB_XFRMOUTPOLDEAD),
  42         SNMP_MIB_ITEM("XfrmOutPolError", LINUX_MIB_XFRMOUTPOLERROR),
  43         SNMP_MIB_SENTINEL
  44 };
  45
  46 static unsigned long
  47 fold_field(void *mib[], int offt)
  48 {
  49         unsigned long res = 0;
  50         int i;
  51
  52         for_each_possible_cpu(i) {
  53                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
  54                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
  55         }
  56         return res;
  57 }
  58
  59 static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)
  60 {
  61         int i;
  62         for (i=0; xfrm_mib_list[i].name; i++)
  63                 seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name,
  64                            fold_field((void **)xfrm_statistics,
  65                                       xfrm_mib_list[i].entry));
  66         return 0;
  67 }
  68
  69 static int xfrm_statistics_seq_open(struct inode *inode, struct file *file)
  70 {
  71         return single_open(file, xfrm_statistics_seq_show, NULL);
  72 }
  73
  74 static struct file_operations xfrm_statistics_seq_fops = {
  75         .owner   = THIS_MODULE,
  76         .open    = xfrm_statistics_seq_open,
  77         .read    = seq_read,
  78         .llseek  = seq_lseek,
  79         .release = single_release,
  80 };
  81
  82 int __init xfrm_proc_init(void)
  83 {
  84         int rc = 0;
  85
  86         if (!proc_net_fops_create(&init_net, "xfrm_stat", S_IRUGO,
  87                                   &xfrm_statistics_seq_fops))
  88                 goto stat_fail;
  89
  90  out:
  91         return rc;
  92
  93  stat_fail:
  94         rc = -ENOMEM;
  95         goto out;
  96 }