xfrm_proc.c

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/*
 * xfrm_proc.c
 *
 * Copyright (C)2006-2007 USAGI/WIDE Project
 *
 * Authors: Masahide NAKAMURA <[email protected]>
 *
 * 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\n", 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");
}