[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, <[email protected]>
 *		Gerald J. Heim, <[email protected]>
 *		Fred Baumgarten, <[email protected]>
 *		Erik Schoenfelder, <[email protected]>
 *
 * 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 [[email protected]]
 */
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)
{
	int err;
	struct net *net;

	err = -ENXIO;
	net = get_proc_net(inode);
	if (net == NULL)
		goto err_net;

	err = single_open(file, sockstat_seq_show, net);
	if (err < 0)
		goto err_open;

	return 0;

err_open:
	put_net(net);
err_net:
	return err;
}

static int sockstat_seq_release(struct inode *inode, struct file *file)
{
	struct net *net = ((struct seq_file *)file->private_data)->private;

	put_net(net);
	return single_release(inode, file);
}

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

/* 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_SENTINEL
};

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

	int j, i, count;
	static int out[PERLINE];

	count = 0;
	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {

		if (snmp_fold_field((void **) icmpmsg_statistics, i))
			out[count++] = i;
		if (count < PERLINE)
			continue;

		seq_printf(seq, "\nIcmpMsg:");
		for (j = 0; j < PERLINE; ++j)
			seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
					i & 0xff);
		seq_printf(seq, "\nIcmpMsg: ");
		for (j = 0; j < PERLINE; ++j)
			seq_printf(seq, " %lu",
				snmp_fold_field((void **) icmpmsg_statistics,
				out[j]));
		seq_putc(seq, '\n');
	}
	if (count) {
		seq_printf(seq, "\nIcmpMsg:");
		for (j = 0; j < count; ++j)
			seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
				"In", out[j] & 0xff);
		seq_printf(seq, "\nIcmpMsg:");
		for (j = 0; j < count; ++j)
			seq_printf(seq, " %lu", snmp_fold_field((void **)
				icmpmsg_statistics, out[j]));
	}

#undef PERLINE
}

static void icmp_put(struct seq_file *seq)
{
	int i;

	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 **) icmp_statistics, ICMP_MIB_INMSGS),
		snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			snmp_fold_field((void **) icmpmsg_statistics,
				icmpmibmap[i].index));
	seq_printf(seq, " %lu %lu",
		snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
		snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			snmp_fold_field((void **) 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;

	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(&init_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 **)init_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 **)init_net.mib.tcp_statistics,
						   snmp4_tcp_list[i].entry));
		else
			seq_printf(seq, " %lu",
				   snmp_fold_field((void **)init_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 **)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 **)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(file, snmp_seq_show, NULL);
}

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


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

	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 **)init_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 **)init_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(file, netstat_seq_show, NULL);
}

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

static __net_init int ip_proc_init_net(struct net *net)
{
	if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
		return -ENOMEM;
	return 0;
}

static __net_exit void ip_proc_exit_net(struct net *net)
{
	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)
{
	int rc = 0;

	if (register_pernet_subsys(&ip_proc_ops))
		goto out_pernet;

	if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
		goto out_netstat;

	if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
		goto out_snmp;
out:
	return rc;
out_snmp:
	proc_net_remove(&init_net, "netstat");
out_netstat:
	unregister_pernet_subsys(&ip_proc_ops);
out_pernet:
	rc = -ENOMEM;
	goto out;
}
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, <[email protected]>
	11	* Gerald J. Heim, <[email protected]>
	12	* Fred Baumgarten, <[email protected]>
	13	* Erik Schoenfelder, <[email protected]>
	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 [[email protected]]
	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	{
fd4e7b50 PE	74	int err;
	75	struct net *net;
	76
	77	err = -ENXIO;
	78	net = get_proc_net(inode);
	79	if (net == NULL)
	80	goto err_net;
	81
	82	err = single_open(file, sockstat_seq_show, net);
	83	if (err < 0)
	84	goto err_open;
	85
	86	return 0;
	87
	88	err_open:
	89	put_net(net);
	90	err_net:
	91	return err;
	92	}
	93
	94	static int sockstat_seq_release(struct inode inode, struct file file)
	95	{
	96	struct net net = ((struct seq_file )file->private_data)->private;
	97
	98	put_net(net);
	99	return single_release(inode, file);
1da177e4 LT	100	}
1da177e4 LT	101
9a32144e	102	static const struct file_operations sockstat_seq_fops = {
1da177e4 LT	103	.owner = THIS_MODULE,
	104	.open = sockstat_seq_open,
	105	.read = seq_read,
	106	.llseek = seq_lseek,
fd4e7b50	107	.release = sockstat_seq_release,
1da177e4 LT	108	};
1da177e4 LT	109
1da177e4	110	/* snmp items */
9b5b5cff	111	static const struct snmp_mib snmp4_ipstats_list[] = {
1da177e4 LT	112	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
	113	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
	114	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
	115	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
	116	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
	117	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
	118	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
	119	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
	120	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
	121	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
	122	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
	123	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
	124	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
	125	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
	126	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
	127	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
	128	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
	129	SNMP_MIB_SENTINEL
	130	};
	131
d831666e MC	132	/* Following RFC4293 items are displayed in /proc/net/netstat */
	133	static const struct snmp_mib snmp4_ipextstats_list[] = {
	134	SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
	135	SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
	136	SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
	137	SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
	138	SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
	139	SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
	140	SNMP_MIB_SENTINEL
	141	};
	142
96793b48 DS	143	static struct {
	144	char *name;
	145	int index;
	146	} icmpmibmap[] = {
	147	{ "DestUnreachs", ICMP_DEST_UNREACH },
	148	{ "TimeExcds", ICMP_TIME_EXCEEDED },
	149	{ "ParmProbs", ICMP_PARAMETERPROB },
	150	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
	151	{ "Redirects", ICMP_REDIRECT },
	152	{ "Echos", ICMP_ECHO },
	153	{ "EchoReps", ICMP_ECHOREPLY },
	154	{ "Timestamps", ICMP_TIMESTAMP },
	155	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
	156	{ "AddrMasks", ICMP_ADDRESS },
	157	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc	158	{ NULL, 0 }
96793b48 DS	159	};
	160
	161
9b5b5cff	162	static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4 LT	163	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
	164	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
	165	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
	166	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
	167	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
	168	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
	169	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
	170	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
	171	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
	172	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
	173	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
	174	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
	175	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
	176	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
	177	SNMP_MIB_SENTINEL
	178	};
	179
9b5b5cff	180	static const struct snmp_mib snmp4_udp_list[] = {
1da177e4 LT	181	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
	182	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
	183	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
	184	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c MB	185	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
81aa646c MB	186	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
1da177e4 LT	187	SNMP_MIB_SENTINEL
	188	};
	189
9b5b5cff	190	static const struct snmp_mib snmp4_net_list[] = {
1da177e4 LT	191	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
	192	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
	193	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
	194	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
	195	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
	196	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
	197	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
	198	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
	199	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
	200	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
	201	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
	202	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
	203	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
	204	SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
	205	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
	206	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
	207	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
	208	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
	209	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
	210	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
	211	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
	212	SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
	213	SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
	214	SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
	215	SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
	216	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
	217	SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
	218	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
	219	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
	220	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
	221	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
	222	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
	223	SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
	224	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
	225	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
	226	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
	227	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
	228	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
	229	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
	230	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
	231	SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
	232	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
	233	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
	234	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
	235	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
	236	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
	237	SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
	238	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
	239	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
	240	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
	241	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
	242	SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
	243	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
	244	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
	245	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
	246	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
	247	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
	248	SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
	249	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
	250	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
	251	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
	252	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
	253	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
	254	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
255	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
18f02545 IJ	256	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
	257	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
	258	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b	259	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
1da177e4 LT	260	SNMP_MIB_SENTINEL
	261	};
	262
96793b48 DS	263	static void icmpmsg_put(struct seq_file *seq)
	264	{
	265	#define PERLINE 16
	266
	267	int j, i, count;
	268	static int out[PERLINE];
	269
	270	count = 0;
	271	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
	272
	273	if (snmp_fold_field((void **) icmpmsg_statistics, i))
	274	out[count++] = i;
	275	if (count < PERLINE)
	276	continue;
	277
	278	seq_printf(seq, "\nIcmpMsg:");
	279	for (j = 0; j < PERLINE; ++j)
	280	seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
	281	i & 0xff);
	282	seq_printf(seq, "\nIcmpMsg: ");
	283	for (j = 0; j < PERLINE; ++j)
	284	seq_printf(seq, " %lu",
	285	snmp_fold_field((void **) icmpmsg_statistics,
	286	out[j]));
	287	seq_putc(seq, '\n');
	288	}
	289	if (count) {
	290	seq_printf(seq, "\nIcmpMsg:");
	291	for (j = 0; j < count; ++j)
	292	seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
	293	"In", out[j] & 0xff);
	294	seq_printf(seq, "\nIcmpMsg:");
	295	for (j = 0; j < count; ++j)
	296	seq_printf(seq, " %lu", snmp_fold_field((void **)
	297	icmpmsg_statistics, out[j]));
	298	}
	299
	300	#undef PERLINE
	301	}
	302
	303	static void icmp_put(struct seq_file *seq)
	304	{
	305	int i;
	306
	307	seq_puts(seq, "\nIcmp: InMsgs InErrors");
	308	for (i=0; icmpmibmap[i].name != NULL; i++)
	309	seq_printf(seq, " In%s", icmpmibmap[i].name);
	310	seq_printf(seq, " OutMsgs OutErrors");
	311	for (i=0; icmpmibmap[i].name != NULL; i++)
	312	seq_printf(seq, " Out%s", icmpmibmap[i].name);
	313	seq_printf(seq, "\nIcmp: %lu %lu",
	314	snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
	315	snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
	316	for (i=0; icmpmibmap[i].name != NULL; i++)
	317	seq_printf(seq, " %lu",
	318	snmp_fold_field((void **) icmpmsg_statistics,
	319	icmpmibmap[i].index));
	320	seq_printf(seq, " %lu %lu",
	321	snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
	322	snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
	323	for (i=0; icmpmibmap[i].name != NULL; i++)
	324	seq_printf(seq, " %lu",
	325	snmp_fold_field((void **) icmpmsg_statistics,
064f3605	326	icmpmibmap[i].index \| 0x100));
96793b48 DS	327	}
96793b48 DS	328
1da177e4 LT	329	/*
	330	* Called from the PROCfs module. This outputs /proc/net/snmp.
	331	*/
	332	static int snmp_seq_show(struct seq_file seq, void v)
	333	{
	334	int i;
	335
	336	seq_puts(seq, "Ip: Forwarding DefaultTTL");
	337
	338	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
	339	seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
	340
	341	seq_printf(seq, "\nIp: %d %d",
586f1211 PE	342	IPV4_DEVCONF_ALL(&init_net, FORWARDING) ? 1 : 2,
586f1211 PE	343	sysctl_ip_default_ttl);
1da177e4 LT	344
	345	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
	346	seq_printf(seq, " %lu",
a20f5799	347	snmp_fold_field((void **)init_net.mib.ip_statistics,
5e0f0435	348	snmp4_ipstats_list[i].entry));
1da177e4	349
96793b48 DS	350	icmp_put(seq); /* RFC 2011 compatibility */
96793b48 DS	351	icmpmsg_put(seq);
1da177e4 LT	352
	353	seq_puts(seq, "\nTcp:");
	354	for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
	355	seq_printf(seq, " %s", snmp4_tcp_list[i].name);
	356
	357	seq_puts(seq, "\nTcp:");
	358	for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
	359	/* MaxConn field is signed, RFC 2012 */
	360	if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
	361	seq_printf(seq, " %ld",
57ef42d5	362	snmp_fold_field((void **)init_net.mib.tcp_statistics,
5e0f0435	363	snmp4_tcp_list[i].entry));
1da177e4 LT	364	else
1da177e4 LT	365	seq_printf(seq, " %lu",
57ef42d5	366	snmp_fold_field((void **)init_net.mib.tcp_statistics,
5e0f0435	367	snmp4_tcp_list[i].entry));
1da177e4 LT	368	}
	369
	370	seq_puts(seq, "\nUdp:");
	371	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	372	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	373
	374	seq_puts(seq, "\nUdp:");
	375	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	376	seq_printf(seq, " %lu",
5e0f0435 HX	377	snmp_fold_field((void **)udp_statistics,
5e0f0435 HX	378	snmp4_udp_list[i].entry));
1da177e4	379
ba4e58ec GR	380	/* the UDP and UDP-Lite MIBs are the same */
	381	seq_puts(seq, "\nUdpLite:");
	382	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	383	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	384
	385	seq_puts(seq, "\nUdpLite:");
	386	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	387	seq_printf(seq, " %lu",
5e0f0435 HX	388	snmp_fold_field((void **)udplite_statistics,
5e0f0435 HX	389	snmp4_udp_list[i].entry));
db8dac20	390
1da177e4 LT	391	seq_putc(seq, '\n');
	392	return 0;
	393	}
	394
	395	static int snmp_seq_open(struct inode inode, struct file file)
	396	{
	397	return single_open(file, snmp_seq_show, NULL);
	398	}
	399
9a32144e	400	static const struct file_operations snmp_seq_fops = {
1da177e4 LT	401	.owner = THIS_MODULE,
	402	.open = snmp_seq_open,
	403	.read = seq_read,
	404	.llseek = seq_lseek,
	405	.release = single_release,
	406	};
	407
96793b48 DS	408
96793b48 DS	409
1da177e4 LT	410	/*
	411	* Output /proc/net/netstat
	412	*/
	413	static int netstat_seq_show(struct seq_file seq, void v)
	414	{
	415	int i;
	416
	417	seq_puts(seq, "TcpExt:");
	418	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	419	seq_printf(seq, " %s", snmp4_net_list[i].name);
	420
	421	seq_puts(seq, "\nTcpExt:");
	422	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	423	seq_printf(seq, " %lu",
61a7e260	424	snmp_fold_field((void **)init_net.mib.net_statistics,
5e0f0435	425	snmp4_net_list[i].entry));
1da177e4	426
d831666e MC	427	seq_puts(seq, "\nIpExt:");
	428	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
	429	seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
	430
	431	seq_puts(seq, "\nIpExt:");
	432	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
	433	seq_printf(seq, " %lu",
a20f5799	434	snmp_fold_field((void **)init_net.mib.ip_statistics,
d831666e MC	435	snmp4_ipextstats_list[i].entry));
d831666e MC	436
1da177e4 LT	437	seq_putc(seq, '\n');
	438	return 0;
	439	}
	440
	441	static int netstat_seq_open(struct inode inode, struct file file)
	442	{
	443	return single_open(file, netstat_seq_show, NULL);
	444	}
	445
9a32144e	446	static const struct file_operations netstat_seq_fops = {
1da177e4 LT	447	.owner = THIS_MODULE,
	448	.open = netstat_seq_open,
	449	.read = seq_read,
	450	.llseek = seq_lseek,
	451	.release = single_release,
	452	};
	453
d0538ca3 PE	454	static __net_init int ip_proc_init_net(struct net *net)
	455	{
	456	if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
	457	return -ENOMEM;
	458	return 0;
	459	}
	460
	461	static __net_exit void ip_proc_exit_net(struct net *net)
	462	{
	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)
	472	{
	473	int rc = 0;
	474
d0538ca3 PE	475	if (register_pernet_subsys(&ip_proc_ops))
	476	goto out_pernet;
	477
457c4cbc	478	if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
1da177e4 LT	479	goto out_netstat;
1da177e4 LT	480
457c4cbc	481	if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
1da177e4	482	goto out_snmp;
1da177e4 LT	483	out:
1da177e4 LT	484	return rc;
1da177e4	485	out_snmp:
457c4cbc	486	proc_net_remove(&init_net, "netstat");
1da177e4	487	out_netstat:
d0538ca3 PE	488	unregister_pernet_subsys(&ip_proc_ops);
d0538ca3 PE	489	out_pernet:
1da177e4 LT	490	rc = -ENOMEM;
	491	goto out;
	492	}
33490170	493