LXR linux/net/xfrm/xfrm

   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
  18static 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("XfrmInStateSeqError", LINUX_MIB_XFRMINSTATESEQERROR),
  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("XfrmOutStateSeqError", LINUX_MIB_XFRMOUTSTATESEQERROR),
  40        SNMP_MIB_ITEM("XfrmOutStateExpired", LINUX_MIB_XFRMOUTSTATEEXPIRED),
  41        SNMP_MIB_ITEM("XfrmOutPolBlock", LINUX_MIB_XFRMOUTPOLBLOCK),
  42        SNMP_MIB_ITEM("XfrmOutPolDead", LINUX_MIB_XFRMOUTPOLDEAD),
  43        SNMP_MIB_ITEM("XfrmOutPolError", LINUX_MIB_XFRMOUTPOLERROR),
  44        SNMP_MIB_SENTINEL
  45};
  46
  47static unsigned long
  48fold_field(void *mib[], int offt)
  49{
  50        unsigned long res = 0;
  51        int i;
  52
  53        for_each_possible_cpu(i) {
  54                res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
  55                res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
  56        }
  57        return res;
  58}
  59
  60static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)
  61{
  62        int i;
  63        for (i=0; xfrm_mib_list[i].name; i++)
  64                seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name,
  65                           fold_field((void **)xfrm_statistics,
  66                                      xfrm_mib_list[i].entry));
  67        return 0;
  68}
  69
  70static int xfrm_statistics_seq_open(struct inode *inode, struct file *file)
  71{
  72        return single_open(file, xfrm_statistics_seq_show, NULL);
  73}
  74
  75static struct file_operations xfrm_statistics_seq_fops = {
  76        .owner   = THIS_MODULE,
  77        .open    = xfrm_statistics_seq_open,
  78        .read    = seq_read,
  79        .llseek  = seq_lseek,
  80        .release = single_release,
  81};
  82
  83int __init xfrm_proc_init(void)
  84{
  85        int rc = 0;
  86
  87        if (!proc_net_fops_create(&init_net, "xfrm_stat", S_IRUGO,
  88                                  &xfrm_statistics_seq_fops))
  89                goto stat_fail;
  90
  91 out:
  92        return rc;
  93
  94 stat_fail:
  95        rc = -ENOMEM;
  96        goto out;
  97}
  98