[deliverable/linux.git] / net / ipv4 / proc.c

/*
 * 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.  It is mainly used for debugging and
 *		statistics.
 *
 * Authors:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *		Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
 *		Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
 *		Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
 *
 * Fixes:
 *		Alan Cox	:	UDP sockets show the rxqueue/txqueue
 *					using hint flag for the netinfo.
 *	Pauline Middelink	:	identd support
 *		Alan Cox	:	Make /proc safer.
 *	Erik Schoenfelder	:	/proc/net/snmp
 *		Alan Cox	:	Handle dead sockets properly.
 *	Gerhard Koerting	:	Show both timers
 *		Alan Cox	:	Allow inode to be NULL (kernel socket)
 *	Andi Kleen		:	Add support for open_requests and
 *					split functions for more readibility.
 *	Andi Kleen		:	Add support for /proc/net/netstat
 *	Arnaldo C. Melo		:	Convert to seq_file
 *
 *		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/types.h>
#include <net/net_namespace.h>
#include <net/icmp.h>
#include <net/protocol.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/udplite.h>
#include <linux/inetdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/sock.h>
#include <net/raw.h>

/*
 *	Report socket allocation statistics [mea@utu.fi]
 */
static int sockstat_seq_show(struct seq_file *seq, void *v)
{
	struct net *net = seq->private;

	socket_seq_show(seq);
	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
		   sock_prot_inuse_get(net, &tcp_prot),
		   atomic_read(&tcp_orphan_count),
		   tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
		   atomic_read(&tcp_memory_allocated));
	seq_printf(seq, "UDP: inuse %d mem %d\n",
		   sock_prot_inuse_get(net, &udp_prot),
		   atomic_read(&udp_memory_allocated));
	seq_printf(seq, "UDPLITE: inuse %d\n",
		   sock_prot_inuse_get(net, &udplite_prot));
	seq_printf(seq, "RAW: inuse %d\n",
		   sock_prot_inuse_get(net, &raw_prot));
	seq_printf(seq,  "FRAG: inuse %d memory %d\n",
			ip_frag_nqueues(net), ip_frag_mem(net));
	return 0;
}

static int sockstat_seq_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, sockstat_seq_show);
}

static const struct file_operations sockstat_seq_fops = {
	.owner	 = THIS_MODULE,
	.open	 = sockstat_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = single_release_net,
};

/* snmp items */
static const struct snmp_mib snmp4_ipstats_list[] = {
	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
	SNMP_MIB_SENTINEL
};

/* Following RFC4293 items are displayed in /proc/net/netstat */
static const struct snmp_mib snmp4_ipextstats_list[] = {
	SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
	SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
	SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
	SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
	SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
	SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
	SNMP_MIB_SENTINEL
};

static struct {
	char *name;
	int index;
} icmpmibmap[] = {
	{ "DestUnreachs", ICMP_DEST_UNREACH },
	{ "TimeExcds", ICMP_TIME_EXCEEDED },
	{ "ParmProbs", ICMP_PARAMETERPROB },
	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
	{ "Redirects", ICMP_REDIRECT },
	{ "Echos", ICMP_ECHO },
	{ "EchoReps", ICMP_ECHOREPLY },
	{ "Timestamps", ICMP_TIMESTAMP },
	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
	{ "AddrMasks", ICMP_ADDRESS },
	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
	{ NULL, 0 }
};


static const struct snmp_mib snmp4_tcp_list[] = {
	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
	SNMP_MIB_SENTINEL
};

static const struct snmp_mib snmp4_udp_list[] = {
	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
	SNMP_MIB_SENTINEL
};

static const struct snmp_mib snmp4_net_list[] = {
	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
	SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
	SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
	SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
	SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
	SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
	SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
	SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
	SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
	SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
	SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
	SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
	SNMP_MIB_SENTINEL
};

static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
			     unsigned short *type, int count)
{
	int j;

	if (count) {
		seq_printf(seq, "\nIcmpMsg:");
		for (j = 0; j < count; ++j)
			seq_printf(seq, " %sType%u",
				type[j] & 0x100 ? "Out" : "In",
				type[j] & 0xff);
		seq_printf(seq, "\nIcmpMsg:");
		for (j = 0; j < count; ++j)
			seq_printf(seq, " %lu", vals[j]);
	}
}

static void icmpmsg_put(struct seq_file *seq)
{
#define PERLINE	16

	int i, count;
	unsigned short type[PERLINE];
	unsigned long vals[PERLINE], val;
	struct net *net = seq->private;

	count = 0;
	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
		val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i);
		if (val) {
			type[count] = i;
			vals[count++] = val;
		}
		if (count == PERLINE) {
			icmpmsg_put_line(seq, vals, type, count);
			count = 0;
		}
	}
	icmpmsg_put_line(seq, vals, type, count);

#undef PERLINE
}

static void icmp_put(struct seq_file *seq)
{
	int i;
	struct net *net = seq->private;

	seq_puts(seq, "\nIcmp: InMsgs InErrors");
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " In%s", icmpmibmap[i].name);
	seq_printf(seq, " OutMsgs OutErrors");
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " Out%s", icmpmibmap[i].name);
	seq_printf(seq, "\nIcmp: %lu %lu",
		snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
		snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			snmp_fold_field((void **) net->mib.icmpmsg_statistics,
				icmpmibmap[i].index));
	seq_printf(seq, " %lu %lu",
		snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
		snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			snmp_fold_field((void **) net->mib.icmpmsg_statistics,
				icmpmibmap[i].index | 0x100));
}

/*
 *	Called from the PROCfs module. This outputs /proc/net/snmp.
 */
static int snmp_seq_show(struct seq_file *seq, void *v)
{
	int i;
	struct net *net = seq->private;

	seq_puts(seq, "Ip: Forwarding DefaultTTL");

	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_ipstats_list[i].name);

	seq_printf(seq, "\nIp: %d %d",
		   IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
		   sysctl_ip_default_ttl);

	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   snmp_fold_field((void **)net->mib.ip_statistics,
					   snmp4_ipstats_list[i].entry));

	icmp_put(seq);	/* RFC 2011 compatibility */
	icmpmsg_put(seq);

	seq_puts(seq, "\nTcp:");
	for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_tcp_list[i].name);

	seq_puts(seq, "\nTcp:");
	for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
		/* MaxConn field is signed, RFC 2012 */
		if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
			seq_printf(seq, " %ld",
				   snmp_fold_field((void **)net->mib.tcp_statistics,
						   snmp4_tcp_list[i].entry));
		else
			seq_printf(seq, " %lu",
				   snmp_fold_field((void **)net->mib.tcp_statistics,
						   snmp4_tcp_list[i].entry));
	}

	seq_puts(seq, "\nUdp:");
	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_udp_list[i].name);

	seq_puts(seq, "\nUdp:");
	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   snmp_fold_field((void **)net->mib.udp_statistics,
					   snmp4_udp_list[i].entry));

	/* the UDP and UDP-Lite MIBs are the same */
	seq_puts(seq, "\nUdpLite:");
	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_udp_list[i].name);

	seq_puts(seq, "\nUdpLite:");
	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   snmp_fold_field((void **)net->mib.udplite_statistics,
					   snmp4_udp_list[i].entry));

	seq_putc(seq, '\n');
	return 0;
}

static int snmp_seq_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, snmp_seq_show);
}

static const struct file_operations snmp_seq_fops = {
	.owner	 = THIS_MODULE,
	.open	 = snmp_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = single_release_net,
};


/*
 *	Output /proc/net/netstat
 */
static int netstat_seq_show(struct seq_file *seq, void *v)
{
	int i;
	struct net *net = seq->private;

	seq_puts(seq, "TcpExt:");
	for (i = 0; snmp4_net_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_net_list[i].name);

	seq_puts(seq, "\nTcpExt:");
	for (i = 0; snmp4_net_list[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   snmp_fold_field((void **)net->mib.net_statistics,
					   snmp4_net_list[i].entry));

	seq_puts(seq, "\nIpExt:");
	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);

	seq_puts(seq, "\nIpExt:");
	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   snmp_fold_field((void **)net->mib.ip_statistics,
					   snmp4_ipextstats_list[i].entry));

	seq_putc(seq, '\n');
	return 0;
}

static int netstat_seq_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, netstat_seq_show);
}

static const struct file_operations netstat_seq_fops = {
	.owner	 = THIS_MODULE,
	.open	 = netstat_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = single_release_net,
};

static __net_init int ip_proc_init_net(struct net *net)
{
	if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
		goto out_sockstat;
	if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
		goto out_netstat;
	if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
		goto out_snmp;

	return 0;

out_snmp:
	proc_net_remove(net, "netstat");
out_netstat:
	proc_net_remove(net, "sockstat");
out_sockstat:
	return -ENOMEM;
}

static __net_exit void ip_proc_exit_net(struct net *net)
{
	proc_net_remove(net, "snmp");
	proc_net_remove(net, "netstat");
	proc_net_remove(net, "sockstat");
}

static __net_initdata struct pernet_operations ip_proc_ops = {
	.init = ip_proc_init_net,
	.exit = ip_proc_exit_net,
};

int __init ip_misc_proc_init(void)
{
	return register_pernet_subsys(&ip_proc_ops);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* INET An implementation of the TCP/IP protocol suite for the LINUX
	3	* operating system. INET is implemented using the BSD Socket
	4	* interface as the means of communication with the user level.
	5	*
	6	* This file implements the various access functions for the
	7	* PROC file system. It is mainly used for debugging and
	8	* statistics.
	9	*
1da177e4 LT	10	* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
	11	* Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
	12	* Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
	13	* Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
	14	*
	15	* Fixes:
	16	* Alan Cox : UDP sockets show the rxqueue/txqueue
	17	* using hint flag for the netinfo.
	18	* Pauline Middelink : identd support
	19	* Alan Cox : Make /proc safer.
	20	* Erik Schoenfelder : /proc/net/snmp
	21	* Alan Cox : Handle dead sockets properly.
	22	* Gerhard Koerting : Show both timers
	23	* Alan Cox : Allow inode to be NULL (kernel socket)
	24	* Andi Kleen : Add support for open_requests and
	25	* split functions for more readibility.
	26	* Andi Kleen : Add support for /proc/net/netstat
	27	* Arnaldo C. Melo : Convert to seq_file
	28	*
	29	* This program is free software; you can redistribute it and/or
	30	* modify it under the terms of the GNU General Public License
	31	* as published by the Free Software Foundation; either version
	32	* 2 of the License, or (at your option) any later version.
	33	*/
	34	#include <linux/types.h>
457c4cbc	35	#include <net/net_namespace.h>
1da177e4 LT	36	#include <net/icmp.h>
	37	#include <net/protocol.h>
	38	#include <net/tcp.h>
	39	#include <net/udp.h>
ba4e58ec	40	#include <net/udplite.h>
14c85021	41	#include <linux/inetdevice.h>
1da177e4 LT	42	#include <linux/proc_fs.h>
	43	#include <linux/seq_file.h>
	44	#include <net/sock.h>
	45	#include <net/raw.h>
	46
1da177e4 LT	47	/*
	48	* Report socket allocation statistics [mea@utu.fi]
	49	*/
	50	static int sockstat_seq_show(struct seq_file seq, void v)
	51	{
fd4e7b50 PE	52	struct net *net = seq->private;
fd4e7b50 PE	53
1da177e4 LT	54	socket_seq_show(seq);
1da177e4 LT	55	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
fd4e7b50	56	sock_prot_inuse_get(net, &tcp_prot),
65f76517	57	atomic_read(&tcp_orphan_count),
295ff7ed	58	tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
1da177e4	59	atomic_read(&tcp_memory_allocated));
c29a0bc4	60	seq_printf(seq, "UDP: inuse %d mem %d\n",
fd4e7b50	61	sock_prot_inuse_get(net, &udp_prot),
95766fff	62	atomic_read(&udp_memory_allocated));
c29a0bc4	63	seq_printf(seq, "UDPLITE: inuse %d\n",
fd4e7b50	64	sock_prot_inuse_get(net, &udplite_prot));
c29a0bc4	65	seq_printf(seq, "RAW: inuse %d\n",
fd4e7b50	66	sock_prot_inuse_get(net, &raw_prot));
7eb95156	67	seq_printf(seq, "FRAG: inuse %d memory %d\n",
fd4e7b50	68	ip_frag_nqueues(net), ip_frag_mem(net));
1da177e4 LT	69	return 0;
	70	}
	71
	72	static int sockstat_seq_open(struct inode inode, struct file file)
	73	{
de05c557	74	return single_open_net(inode, file, sockstat_seq_show);
fd4e7b50 PE	75	}
fd4e7b50 PE	76
9a32144e	77	static const struct file_operations sockstat_seq_fops = {
1da177e4 LT	78	.owner = THIS_MODULE,
	79	.open = sockstat_seq_open,
	80	.read = seq_read,
	81	.llseek = seq_lseek,
b6fcbdb4	82	.release = single_release_net,
1da177e4 LT	83	};
1da177e4 LT	84
1da177e4	85	/* snmp items */
9b5b5cff	86	static const struct snmp_mib snmp4_ipstats_list[] = {
1da177e4 LT	87	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
	88	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
	89	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
	90	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
	91	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
	92	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
	93	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
	94	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
	95	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
	96	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
	97	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
	98	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
	99	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
	100	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
	101	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
	102	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
	103	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
	104	SNMP_MIB_SENTINEL
	105	};
	106
d831666e MC	107	/* Following RFC4293 items are displayed in /proc/net/netstat */
	108	static const struct snmp_mib snmp4_ipextstats_list[] = {
	109	SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
	110	SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
	111	SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
	112	SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
	113	SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
	114	SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
	115	SNMP_MIB_SENTINEL
	116	};
	117
96793b48 DS	118	static struct {
	119	char *name;
	120	int index;
	121	} icmpmibmap[] = {
	122	{ "DestUnreachs", ICMP_DEST_UNREACH },
	123	{ "TimeExcds", ICMP_TIME_EXCEEDED },
	124	{ "ParmProbs", ICMP_PARAMETERPROB },
	125	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
	126	{ "Redirects", ICMP_REDIRECT },
	127	{ "Echos", ICMP_ECHO },
	128	{ "EchoReps", ICMP_ECHOREPLY },
	129	{ "Timestamps", ICMP_TIMESTAMP },
	130	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
	131	{ "AddrMasks", ICMP_ADDRESS },
	132	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc	133	{ NULL, 0 }
96793b48 DS	134	};
	135
	136
9b5b5cff	137	static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4 LT	138	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
	139	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
	140	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
	141	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
	142	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
	143	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
	144	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
	145	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
	146	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
	147	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
	148	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
	149	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
	150	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
	151	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
	152	SNMP_MIB_SENTINEL
	153	};
	154
9b5b5cff	155	static const struct snmp_mib snmp4_udp_list[] = {
1da177e4 LT	156	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
	157	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
	158	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
	159	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c MB	160	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
81aa646c MB	161	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
1da177e4 LT	162	SNMP_MIB_SENTINEL
	163	};
	164
9b5b5cff	165	static const struct snmp_mib snmp4_net_list[] = {
1da177e4 LT	166	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
	167	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
	168	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
	169	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
	170	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
	171	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
	172	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
	173	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
	174	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
	175	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
	176	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
	177	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
	178	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
	179	SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
	180	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
	181	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
	182	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
	183	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
	184	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
	185	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
	186	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
	187	SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
	188	SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
	189	SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
	190	SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
	191	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
	192	SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
	193	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
	194	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
	195	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
	196	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
	197	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
	198	SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
	199	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
	200	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
	201	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
	202	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
	203	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
	204	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
	205	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
	206	SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
	207	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
	208	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
	209	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
	210	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
	211	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
	212	SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
	213	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
	214	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
	215	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
	216	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
	217	SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
	218	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
	219	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
	220	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
	221	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
	222	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
	223	SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
	224	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
	225	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
	226	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
	227	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
	228	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
	229	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
230	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
18f02545 IJ	231	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
	232	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
	233	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b	234	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3 DM	235	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
785957d3 DM	236	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
111cc8b9 IJ	237	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
	238	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
	239	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
1da177e4 LT	240	SNMP_MIB_SENTINEL
	241	};
	242
b971e7ac ED	243	static void icmpmsg_put_line(struct seq_file seq, unsigned long vals,
	244	unsigned short *type, int count)
	245	{
	246	int j;
	247
	248	if (count) {
	249	seq_printf(seq, "\nIcmpMsg:");
	250	for (j = 0; j < count; ++j)
	251	seq_printf(seq, " %sType%u",
	252	type[j] & 0x100 ? "Out" : "In",
	253	type[j] & 0xff);
	254	seq_printf(seq, "\nIcmpMsg:");
	255	for (j = 0; j < count; ++j)
	256	seq_printf(seq, " %lu", vals[j]);
	257	}
	258	}
	259
96793b48 DS	260	static void icmpmsg_put(struct seq_file *seq)
	261	{
	262	#define PERLINE 16
	263
b971e7ac ED	264	int i, count;
	265	unsigned short type[PERLINE];
	266	unsigned long vals[PERLINE], val;
229bf0cb	267	struct net *net = seq->private;
96793b48 DS	268
	269	count = 0;
	270	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
b971e7ac ED	271	val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i);
	272	if (val) {
	273	type[count] = i;
	274	vals[count++] = val;
	275	}
	276	if (count == PERLINE) {
	277	icmpmsg_put_line(seq, vals, type, count);
	278	count = 0;
	279	}
96793b48	280	}
b971e7ac	281	icmpmsg_put_line(seq, vals, type, count);
96793b48 DS	282
	283	#undef PERLINE
	284	}
	285
	286	static void icmp_put(struct seq_file *seq)
	287	{
	288	int i;
229bf0cb	289	struct net *net = seq->private;
96793b48 DS	290
	291	seq_puts(seq, "\nIcmp: InMsgs InErrors");
	292	for (i=0; icmpmibmap[i].name != NULL; i++)
	293	seq_printf(seq, " In%s", icmpmibmap[i].name);
	294	seq_printf(seq, " OutMsgs OutErrors");
	295	for (i=0; icmpmibmap[i].name != NULL; i++)
	296	seq_printf(seq, " Out%s", icmpmibmap[i].name);
	297	seq_printf(seq, "\nIcmp: %lu %lu",
229bf0cb PE	298	snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
229bf0cb PE	299	snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
96793b48 DS	300	for (i=0; icmpmibmap[i].name != NULL; i++)
96793b48 DS	301	seq_printf(seq, " %lu",
229bf0cb	302	snmp_fold_field((void **) net->mib.icmpmsg_statistics,
96793b48 DS	303	icmpmibmap[i].index));
96793b48 DS	304	seq_printf(seq, " %lu %lu",
229bf0cb PE	305	snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
229bf0cb PE	306	snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
96793b48 DS	307	for (i=0; icmpmibmap[i].name != NULL; i++)
96793b48 DS	308	seq_printf(seq, " %lu",
229bf0cb	309	snmp_fold_field((void **) net->mib.icmpmsg_statistics,
064f3605	310	icmpmibmap[i].index \| 0x100));
96793b48 DS	311	}
96793b48 DS	312
1da177e4 LT	313	/*
	314	* Called from the PROCfs module. This outputs /proc/net/snmp.
	315	*/
	316	static int snmp_seq_show(struct seq_file seq, void v)
	317	{
	318	int i;
229bf0cb	319	struct net *net = seq->private;
1da177e4 LT	320
	321	seq_puts(seq, "Ip: Forwarding DefaultTTL");
	322
	323	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
	324	seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
	325
	326	seq_printf(seq, "\nIp: %d %d",
8e3461d0	327	IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
586f1211	328	sysctl_ip_default_ttl);
1da177e4 LT	329
	330	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
	331	seq_printf(seq, " %lu",
229bf0cb	332	snmp_fold_field((void **)net->mib.ip_statistics,
5e0f0435	333	snmp4_ipstats_list[i].entry));
1da177e4	334
96793b48 DS	335	icmp_put(seq); /* RFC 2011 compatibility */
96793b48 DS	336	icmpmsg_put(seq);
1da177e4 LT	337
	338	seq_puts(seq, "\nTcp:");
	339	for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
	340	seq_printf(seq, " %s", snmp4_tcp_list[i].name);
	341
	342	seq_puts(seq, "\nTcp:");
	343	for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
	344	/* MaxConn field is signed, RFC 2012 */
	345	if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
	346	seq_printf(seq, " %ld",
229bf0cb	347	snmp_fold_field((void **)net->mib.tcp_statistics,
5e0f0435	348	snmp4_tcp_list[i].entry));
1da177e4 LT	349	else
1da177e4 LT	350	seq_printf(seq, " %lu",
229bf0cb	351	snmp_fold_field((void **)net->mib.tcp_statistics,
5e0f0435	352	snmp4_tcp_list[i].entry));
1da177e4 LT	353	}
	354
	355	seq_puts(seq, "\nUdp:");
	356	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	357	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	358
	359	seq_puts(seq, "\nUdp:");
	360	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	361	seq_printf(seq, " %lu",
229bf0cb	362	snmp_fold_field((void **)net->mib.udp_statistics,
5e0f0435	363	snmp4_udp_list[i].entry));
1da177e4	364
ba4e58ec GR	365	/* the UDP and UDP-Lite MIBs are the same */
	366	seq_puts(seq, "\nUdpLite:");
	367	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	368	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	369
	370	seq_puts(seq, "\nUdpLite:");
	371	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	372	seq_printf(seq, " %lu",
229bf0cb	373	snmp_fold_field((void **)net->mib.udplite_statistics,
5e0f0435	374	snmp4_udp_list[i].entry));
db8dac20	375
1da177e4 LT	376	seq_putc(seq, '\n');
	377	return 0;
	378	}
	379
	380	static int snmp_seq_open(struct inode inode, struct file file)
	381	{
de05c557	382	return single_open_net(inode, file, snmp_seq_show);
229bf0cb PE	383	}
229bf0cb PE	384
9a32144e	385	static const struct file_operations snmp_seq_fops = {
1da177e4 LT	386	.owner = THIS_MODULE,
	387	.open = snmp_seq_open,
	388	.read = seq_read,
	389	.llseek = seq_lseek,
b6fcbdb4	390	.release = single_release_net,
1da177e4 LT	391	};
1da177e4 LT	392
96793b48 DS	393
96793b48 DS	394
1da177e4 LT	395	/*
	396	* Output /proc/net/netstat
	397	*/
	398	static int netstat_seq_show(struct seq_file seq, void v)
	399	{
	400	int i;
7b7a9dfd	401	struct net *net = seq->private;
1da177e4 LT	402
	403	seq_puts(seq, "TcpExt:");
	404	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	405	seq_printf(seq, " %s", snmp4_net_list[i].name);
	406
	407	seq_puts(seq, "\nTcpExt:");
	408	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	409	seq_printf(seq, " %lu",
7b7a9dfd	410	snmp_fold_field((void **)net->mib.net_statistics,
5e0f0435	411	snmp4_net_list[i].entry));
1da177e4	412
d831666e MC	413	seq_puts(seq, "\nIpExt:");
	414	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
	415	seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
	416
	417	seq_puts(seq, "\nIpExt:");
	418	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
	419	seq_printf(seq, " %lu",
7b7a9dfd	420	snmp_fold_field((void **)net->mib.ip_statistics,
d831666e MC	421	snmp4_ipextstats_list[i].entry));
d831666e MC	422
1da177e4 LT	423	seq_putc(seq, '\n');
	424	return 0;
	425	}
	426
	427	static int netstat_seq_open(struct inode inode, struct file file)
	428	{
de05c557	429	return single_open_net(inode, file, netstat_seq_show);
7b7a9dfd PE	430	}
7b7a9dfd PE	431
9a32144e	432	static const struct file_operations netstat_seq_fops = {
1da177e4 LT	433	.owner = THIS_MODULE,
	434	.open = netstat_seq_open,
	435	.read = seq_read,
	436	.llseek = seq_lseek,
b6fcbdb4	437	.release = single_release_net,
1da177e4 LT	438	};
1da177e4 LT	439
d0538ca3 PE	440	static __net_init int ip_proc_init_net(struct net *net)
	441	{
	442	if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
60bdde95	443	goto out_sockstat;
7b7a9dfd PE	444	if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
7b7a9dfd PE	445	goto out_netstat;
229bf0cb PE	446	if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
229bf0cb PE	447	goto out_snmp;
7b7a9dfd	448
d0538ca3	449	return 0;
7b7a9dfd	450
229bf0cb PE	451	out_snmp:
229bf0cb PE	452	proc_net_remove(net, "netstat");
7b7a9dfd PE	453	out_netstat:
7b7a9dfd PE	454	proc_net_remove(net, "sockstat");
60bdde95	455	out_sockstat:
7b7a9dfd	456	return -ENOMEM;
d0538ca3 PE	457	}
	458
	459	static __net_exit void ip_proc_exit_net(struct net *net)
	460	{
229bf0cb	461	proc_net_remove(net, "snmp");
7b7a9dfd	462	proc_net_remove(net, "netstat");
d0538ca3 PE	463	proc_net_remove(net, "sockstat");
	464	}
	465
	466	static __net_initdata struct pernet_operations ip_proc_ops = {
	467	.init = ip_proc_init_net,
	468	.exit = ip_proc_exit_net,
	469	};
	470
1da177e4 LT	471	int __init ip_misc_proc_init(void)
1da177e4 LT	472	{
60bdde95	473	return register_pernet_subsys(&ip_proc_ops);
1da177e4	474	}
33490170	475