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linux/net/ipv6/proc.c
David L Stevens 14878f75ab [IPV6]: Add ICMPMsgStats MIB (RFC 4293) [rev 2] 
Background: RFC 4293 deprecates existing individual, named ICMP
type counters to be replaced with the ICMPMsgStatsTable. This table
includes entries for both IPv4 and IPv6, and requires counting of all
ICMP types, whether or not the machine implements the type.

These patches "remove" (but not really) the existing counters, and
replace them with the ICMPMsgStats tables for v4 and v6.
It includes the named counters in the /proc places they were, but gets the
values for them from the new tables. It also counts packets generated
from raw socket output (e.g., OutEchoes, MLD queries, RA's from
radvd, etc).

Changes:
1) create icmpmsg_statistics mib
2) create icmpv6msg_statistics mib
3) modify existing counters to use these
4) modify /proc/net/snmp to add "IcmpMsg" with all ICMP types
        listed by number for easy SNMP parsing
5) modify /proc/net/snmp printing for "Icmp" to get the named data
        from new counters.
[new to 2nd revision]
6) support per-interface ICMP stats
7) use common macro for per-device stat macros

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:51:27 -07:00

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/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* This file implements the various access functions for the
* PROC file system. This is very similar to the IPv4 version,
* except it reports the sockets in the INET6 address family.
*
* Version: $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
*
* Authors: David S. Miller (davem@caip.rutgers.edu)
* YOSHIFUJI Hideaki <yoshfuji@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/socket.h>
#include <linux/net.h>
#include <linux/ipv6.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stddef.h>
#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <net/transp_v6.h>
#include <net/ipv6.h>
static struct proc_dir_entry *proc_net_devsnmp6;
static int fold_prot_inuse(struct proto *proto)
{
int res = 0;
int cpu;
for_each_possible_cpu(cpu)
res += proto->stats[cpu].inuse;
return res;
}
static int sockstat6_seq_show(struct seq_file *seq, void *v)
{
seq_printf(seq, "TCP6: inuse %d\n",
fold_prot_inuse(&tcpv6_prot));
seq_printf(seq, "UDP6: inuse %d\n",
fold_prot_inuse(&udpv6_prot));
seq_printf(seq, "UDPLITE6: inuse %d\n",
fold_prot_inuse(&udplitev6_prot));
seq_printf(seq, "RAW6: inuse %d\n",
fold_prot_inuse(&rawv6_prot));
seq_printf(seq, "FRAG6: inuse %d memory %d\n",
ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
return 0;
}
static struct snmp_mib snmp6_ipstats_list[] = {
/* ipv6 mib according to RFC 2465 */
SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp6_icmp6_list[] = {
/* icmpv6 mib according to RFC 2466 */
SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
SNMP_MIB_SENTINEL
};
/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
static char *icmp6type2name[256] = {
[ICMPV6_DEST_UNREACH] = "DestUnreachs",
[ICMPV6_PKT_TOOBIG] = "PktTooBigs",
[ICMPV6_TIME_EXCEED] = "TimeExcds",
[ICMPV6_PARAMPROB] = "ParmProblems",
[ICMPV6_ECHO_REQUEST] = "EchoRequest",
[ICMPV6_ECHO_REPLY] = "EchoReplies",
[ICMPV6_MGM_QUERY] = "GroupMembQueries",
[ICMPV6_MGM_REPORT] = "GroupMembResponses",
[ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
[ICMPV6_MLD2_REPORT] = "MLDv2Reports",
[NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
[NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
[NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
[NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
[NDISC_REDIRECT] = "NeighborRedirects",
};
static struct snmp_mib snmp6_udp6_list[] = {
SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp6_udplite6_list[] = {
SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
SNMP_MIB_SENTINEL
};
static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
{
static char name[32];
int i;
/* print by name -- deprecated items */
for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
int icmptype;
char *p;
icmptype = i & 0xff;
p = icmp6type2name[icmptype];
if (!p) /* don't print un-named types here */
continue;
(void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
i & 0x100 ? "Out" : "In", p);
seq_printf(seq, "%-32s\t%lu\n", name,
snmp_fold_field(mib, i));
}
/* print by number (nonzero only) - ICMPMsgStat format */
for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
unsigned long val;
val = snmp_fold_field(mib, i);
if (!val)
continue;
(void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
i & 0x100 ? "Out" : "In", i & 0xff);
seq_printf(seq, "%-32s\t%lu\n", name, val);
}
return;
}
static inline void
snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
{
int i;
for (i=0; itemlist[i].name; i++)
seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
snmp_fold_field(mib, itemlist[i].entry));
}
static int snmp6_seq_show(struct seq_file *seq, void *v)
{
struct inet6_dev *idev = (struct inet6_dev *)seq->private;
if (idev) {
seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
} else {
snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
}
return 0;
}
static int sockstat6_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, sockstat6_seq_show, NULL);
}
static const struct file_operations sockstat6_seq_fops = {
.owner = THIS_MODULE,
.open = sockstat6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int snmp6_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, snmp6_seq_show, PDE(inode)->data);
}
static const struct file_operations snmp6_seq_fops = {
.owner = THIS_MODULE,
.open = snmp6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int snmp6_register_dev(struct inet6_dev *idev)
{
struct proc_dir_entry *p;
if (!idev || !idev->dev)
return -EINVAL;
if (!proc_net_devsnmp6)
return -ENOENT;
p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
if (!p)
return -ENOMEM;
p->data = idev;
p->proc_fops = &snmp6_seq_fops;
idev->stats.proc_dir_entry = p;
return 0;
}
int snmp6_unregister_dev(struct inet6_dev *idev)
{
if (!proc_net_devsnmp6)
return -ENOENT;
if (!idev || !idev->stats.proc_dir_entry)
return -EINVAL;
remove_proc_entry(idev->stats.proc_dir_entry->name,
proc_net_devsnmp6);
idev->stats.proc_dir_entry = NULL;
return 0;
}
int __init ipv6_misc_proc_init(void)
{
int rc = 0;
if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
goto proc_snmp6_fail;
proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
if (!proc_net_devsnmp6)
goto proc_dev_snmp6_fail;
if (!proc_net_fops_create(&init_net, "sockstat6", S_IRUGO, &sockstat6_seq_fops))
goto proc_sockstat6_fail;
out:
return rc;
proc_sockstat6_fail:
proc_net_remove(&init_net, "dev_snmp6");
proc_dev_snmp6_fail:
proc_net_remove(&init_net, "snmp6");
proc_snmp6_fail:
rc = -ENOMEM;
goto out;
}
void ipv6_misc_proc_exit(void)
{
proc_net_remove(&init_net, "sockstat6");
proc_net_remove(&init_net, "dev_snmp6");
proc_net_remove(&init_net, "snmp6");
}
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