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linux/net/ipv6/proc.c
Eric Dumazet 1f07d03e20 net: add SNMP counters tracking incoming ECN bits 
With GRO/LRO processing, there is a problem because Ip[6]InReceives SNMP
counters do not count the number of frames, but number of aggregated
segments.

Its probably too late to change this now.

This patch adds four new counters, tracking number of frames, regardless
of LRO/GRO, and on a per ECN status basis, for IPv4 and IPv6.

Ip[6]NoECTPkts : Number of packets received with NOECT
Ip[6]ECT1Pkts  : Number of packets received with ECT(1)
Ip[6]ECT0Pkts  : Number of packets received with ECT(0)
Ip[6]CEPkts    : Number of packets received with Congestion Experienced

lph37:~# nstat | egrep "Pkts|InReceive"
IpInReceives                    1634137            0.0
Ip6InReceives                   3714107            0.0
Ip6InNoECTPkts                  19205              0.0
Ip6InECT0Pkts                   52651828           0.0
IpExtInNoECTPkts                33630              0.0
IpExtInECT0Pkts                 15581379           0.0
IpExtInCEPkts                   6                  0.0

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-08-08 22:24:59 -07:00

346 lines
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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.
*
* 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 <linux/export.h>
#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/transp_v6.h>
#include <net/ipv6.h>
static int sockstat6_seq_show(struct seq_file *seq, void *v)
{
struct net *net = seq->private;
seq_printf(seq, "TCP6: inuse %d\n",
sock_prot_inuse_get(net, &tcpv6_prot));
seq_printf(seq, "UDP6: inuse %d\n",
sock_prot_inuse_get(net, &udpv6_prot));
seq_printf(seq, "UDPLITE6: inuse %d\n",
sock_prot_inuse_get(net, &udplitev6_prot));
seq_printf(seq, "RAW6: inuse %d\n",
sock_prot_inuse_get(net, &rawv6_prot));
seq_printf(seq, "FRAG6: inuse %d memory %d\n",
ip6_frag_nqueues(net), ip6_frag_mem(net));
return 0;
}
static int sockstat6_seq_open(struct inode *inode, struct file *file)
{
return single_open_net(inode, file, sockstat6_seq_show);
}
static const struct file_operations sockstat6_seq_fops = {
.owner = THIS_MODULE,
.open = sockstat6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release_net,
};
static const struct snmp_mib snmp6_ipstats_list[] = {
/* ipv6 mib according to RFC 2465 */
SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
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_OUTPKTS),
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_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
/* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */
SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
SNMP_MIB_SENTINEL
};
static const 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_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
SNMP_MIB_SENTINEL
};
/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
static const char *const icmp6type2name[256] = {
[ICMPV6_DEST_UNREACH] = "DestUnreachs",
[ICMPV6_PKT_TOOBIG] = "PktTooBigs",
[ICMPV6_TIME_EXCEED] = "TimeExcds",
[ICMPV6_PARAMPROB] = "ParmProblems",
[ICMPV6_ECHO_REQUEST] = "Echos",
[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] = "Redirects",
};
static const 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_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
SNMP_MIB_SENTINEL
};
static const 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_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
SNMP_MIB_SENTINEL
};
static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
{
char name[32];
int i;
/* print by name -- deprecated items */
for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
int icmptype;
const char *p;
icmptype = i & 0xff;
p = icmp6type2name[icmptype];
if (!p) /* don't print un-named types here */
continue;
snprintf(name, sizeof(name), "Icmp6%s%s",
i & 0x100 ? "Out" : "In", p);
seq_printf(seq, "%-32s\t%lu\n", name,
atomic_long_read(smib + i));
}
/* print by number (nonzero only) - ICMPMsgStat format */
for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
unsigned long val;
val = atomic_long_read(smib + i);
if (!val)
continue;
snprintf(name, sizeof(name), "Icmp6%sType%u",
i & 0x100 ? "Out" : "In", i & 0xff);
seq_printf(seq, "%-32s\t%lu\n", name, val);
}
}
/* can be called either with percpu mib (pcpumib != NULL),
* or shared one (smib != NULL)
*/
static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib,
atomic_long_t *smib,
const struct snmp_mib *itemlist)
{
int i;
unsigned long val;
for (i = 0; itemlist[i].name; i++) {
val = pcpumib ?
snmp_fold_field(pcpumib, itemlist[i].entry) :
atomic_long_read(smib + itemlist[i].entry);
seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
}
}
static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
const struct snmp_mib *itemlist, size_t syncpoff)
{
int i;
for (i = 0; itemlist[i].name; i++)
seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
}
static int snmp6_seq_show(struct seq_file *seq, void *v)
{
struct net *net = (struct net *)seq->private;
snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
NULL, snmp6_icmp6_list);
snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
NULL, snmp6_udp6_list);
snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
NULL, snmp6_udplite6_list);
return 0;
}
static int snmp6_seq_open(struct inode *inode, struct file *file)
{
return single_open_net(inode, file, snmp6_seq_show);
}
static const struct file_operations snmp6_seq_fops = {
.owner = THIS_MODULE,
.open = snmp6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release_net,
};
static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
{
struct inet6_dev *idev = (struct inet6_dev *)seq->private;
seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
snmp6_seq_show_item64(seq, (void __percpu **)idev->stats.ipv6,
snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
snmp6_icmp6_list);
snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
return 0;
}
static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode));
}
static const struct file_operations snmp6_dev_seq_fops = {
.owner = THIS_MODULE,
.open = snmp6_dev_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int snmp6_register_dev(struct inet6_dev *idev)
{
struct proc_dir_entry *p;
struct net *net;
if (!idev || !idev->dev)
return -EINVAL;
net = dev_net(idev->dev);
if (!net->mib.proc_net_devsnmp6)
return -ENOENT;
p = proc_create_data(idev->dev->name, S_IRUGO,
net->mib.proc_net_devsnmp6,
&snmp6_dev_seq_fops, idev);
if (!p)
return -ENOMEM;
idev->stats.proc_dir_entry = p;
return 0;
}
int snmp6_unregister_dev(struct inet6_dev *idev)
{
struct net *net = dev_net(idev->dev);
if (!net->mib.proc_net_devsnmp6)
return -ENOENT;
if (!idev->stats.proc_dir_entry)
return -EINVAL;
proc_remove(idev->stats.proc_dir_entry);
idev->stats.proc_dir_entry = NULL;
return 0;
}
static int __net_init ipv6_proc_init_net(struct net *net)
{
if (!proc_create("sockstat6", S_IRUGO, net->proc_net,
&sockstat6_seq_fops))
return -ENOMEM;
if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops))
goto proc_snmp6_fail;
net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
if (!net->mib.proc_net_devsnmp6)
goto proc_dev_snmp6_fail;
return 0;
proc_dev_snmp6_fail:
remove_proc_entry("snmp6", net->proc_net);
proc_snmp6_fail:
remove_proc_entry("sockstat6", net->proc_net);
return -ENOMEM;
}
static void __net_exit ipv6_proc_exit_net(struct net *net)
{
remove_proc_entry("sockstat6", net->proc_net);
remove_proc_entry("dev_snmp6", net->proc_net);
remove_proc_entry("snmp6", net->proc_net);
}
static struct pernet_operations ipv6_proc_ops = {
.init = ipv6_proc_init_net,
.exit = ipv6_proc_exit_net,
};
int __init ipv6_misc_proc_init(void)
{
return register_pernet_subsys(&ipv6_proc_ops);
}
void ipv6_misc_proc_exit(void)
{
unregister_pernet_subsys(&ipv6_proc_ops);
}
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