[mirror_ubuntu-zesty-kernel.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/bottom_half.h>
#include <linux/inetdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/export.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;
	int orphans, sockets;

	local_bh_disable();
	orphans = percpu_counter_sum_positive(&tcp_orphan_count);
	sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
	local_bh_enable();

	socket_seq_show(seq);
	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
		   sock_prot_inuse_get(net, &tcp_prot), orphans,
		   tcp_death_row.tw_count, sockets,
		   proto_memory_allocated(&tcp_prot));
	seq_printf(seq, "UDP: inuse %d mem %ld\n",
		   sock_prot_inuse_get(net, &udp_prot),
		   proto_memory_allocated(&udp_prot));
	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_INPKTS),
	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_OUTPKTS),
	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_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
	SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
	SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
	SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
	SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
	SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
	SNMP_MIB_SENTINEL
};

static const struct {
	const 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("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_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
	SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
	SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
	SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
	SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
	SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
	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 = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[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;
	atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;

	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 __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   atomic_long_read(ptr + icmpmibmap[i].index));
	seq_printf(seq, " %lu %lu",
		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
	for (i=0; icmpmibmap[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   atomic_long_read(ptr + (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);

	BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
		seq_printf(seq, " %llu",
			   snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
					     snmp4_ipstats_list[i].entry,
					     offsetof(struct ipstats_mib, syncp)));

	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 __percpu **)net->mib.tcp_statistics,
						   snmp4_tcp_list[i].entry));
		else
			seq_printf(seq, " %lu",
				   snmp_fold_field((void __percpu **)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 __percpu **)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 __percpu **)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 __percpu **)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, " %llu",
			   snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
					     snmp4_ipextstats_list[i].entry,
					     offsetof(struct ipstats_mib, syncp)));

	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>
eb4dea58	41	#include <linux/bottom_half.h>
14c85021	42	#include <linux/inetdevice.h>
1da177e4 LT	43	#include <linux/proc_fs.h>
1da177e4 LT	44	#include <linux/seq_file.h>
bc3b2d7f	45	#include <linux/export.h>
1da177e4 LT	46	#include <net/sock.h>
	47	#include <net/raw.h>
	48
1da177e4 LT	49	/*
	50	* Report socket allocation statistics [mea@utu.fi]
	51	*/
	52	static int sockstat_seq_show(struct seq_file seq, void v)
	53	{
fd4e7b50	54	struct net *net = seq->private;
eb4dea58 HX	55	int orphans, sockets;
	56
	57	local_bh_disable();
1c10c49d	58	orphans = percpu_counter_sum_positive(&tcp_orphan_count);
180d8cd9	59	sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
eb4dea58	60	local_bh_enable();
fd4e7b50	61
1da177e4	62	socket_seq_show(seq);
8d987e5c	63	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
eb4dea58 HX	64	sock_prot_inuse_get(net, &tcp_prot), orphans,
eb4dea58 HX	65	tcp_death_row.tw_count, sockets,
180d8cd9	66	proto_memory_allocated(&tcp_prot));
8d987e5c	67	seq_printf(seq, "UDP: inuse %d mem %ld\n",
fd4e7b50	68	sock_prot_inuse_get(net, &udp_prot),
180d8cd9	69	proto_memory_allocated(&udp_prot));
c29a0bc4	70	seq_printf(seq, "UDPLITE: inuse %d\n",
fd4e7b50	71	sock_prot_inuse_get(net, &udplite_prot));
c29a0bc4	72	seq_printf(seq, "RAW: inuse %d\n",
fd4e7b50	73	sock_prot_inuse_get(net, &raw_prot));
7eb95156	74	seq_printf(seq, "FRAG: inuse %d memory %d\n",
fd4e7b50	75	ip_frag_nqueues(net), ip_frag_mem(net));
1da177e4 LT	76	return 0;
	77	}
	78
	79	static int sockstat_seq_open(struct inode inode, struct file file)
	80	{
de05c557	81	return single_open_net(inode, file, sockstat_seq_show);
fd4e7b50 PE	82	}
fd4e7b50 PE	83
9a32144e	84	static const struct file_operations sockstat_seq_fops = {
1da177e4 LT	85	.owner = THIS_MODULE,
	86	.open = sockstat_seq_open,
	87	.read = seq_read,
	88	.llseek = seq_lseek,
b6fcbdb4	89	.release = single_release_net,
1da177e4 LT	90	};
1da177e4 LT	91
1da177e4	92	/* snmp items */
9b5b5cff	93	static const struct snmp_mib snmp4_ipstats_list[] = {
edf391ff	94	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
1da177e4 LT	95	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
	96	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
	97	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
	98	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
	99	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
	100	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
edf391ff	101	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
1da177e4 LT	102	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
	103	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
	104	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
	105	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
	106	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
	107	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
	108	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
	109	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
	110	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
	111	SNMP_MIB_SENTINEL
	112	};
	113
d831666e MC	114	/* Following RFC4293 items are displayed in /proc/net/netstat */
	115	static const struct snmp_mib snmp4_ipextstats_list[] = {
	116	SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
	117	SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
	118	SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
	119	SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
	120	SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
	121	SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
edf391ff NH	122	SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
	123	SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
	124	SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
	125	SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
	126	SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
	127	SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
d831666e MC	128	SNMP_MIB_SENTINEL
	129	};
	130
5833929c AD	131	static const struct {
5833929c AD	132	const char *name;
96793b48 DS	133	int index;
	134	} icmpmibmap[] = {
	135	{ "DestUnreachs", ICMP_DEST_UNREACH },
	136	{ "TimeExcds", ICMP_TIME_EXCEEDED },
	137	{ "ParmProbs", ICMP_PARAMETERPROB },
	138	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
	139	{ "Redirects", ICMP_REDIRECT },
	140	{ "Echos", ICMP_ECHO },
	141	{ "EchoReps", ICMP_ECHOREPLY },
	142	{ "Timestamps", ICMP_TIMESTAMP },
	143	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
	144	{ "AddrMasks", ICMP_ADDRESS },
	145	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc	146	{ NULL, 0 }
96793b48 DS	147	};
	148
	149
9b5b5cff	150	static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4 LT	151	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
	152	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
	153	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
	154	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
	155	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
	156	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
	157	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
	158	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
	159	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
	160	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
	161	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
	162	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
	163	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
	164	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
	165	SNMP_MIB_SENTINEL
	166	};
	167
9b5b5cff	168	static const struct snmp_mib snmp4_udp_list[] = {
1da177e4 LT	169	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
	170	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
	171	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
	172	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c MB	173	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
81aa646c MB	174	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
1da177e4 LT	175	SNMP_MIB_SENTINEL
	176	};
	177
9b5b5cff	178	static const struct snmp_mib snmp4_net_list[] = {
1da177e4 LT	179	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
	180	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
	181	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
	182	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
	183	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
	184	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
	185	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
	186	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
	187	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
	188	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
	189	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
	190	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
	191	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
	192	SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
	193	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
	194	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
	195	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
	196	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
	197	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
	198	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
	199	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
	200	SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
	201	SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
	202	SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
	203	SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
	204	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
	205	SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
	206	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
	207	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
	208	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
	209	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
	210	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
	211	SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
	212	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
	213	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
	214	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
	215	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
	216	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
	217	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
	218	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
1da177e4 LT	219	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
	220	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
	221	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
	222	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
	223	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
	224	SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
	225	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
	226	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
	227	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
	228	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
	229	SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
	230	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
	231	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
	232	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
	233	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
	234	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
	235	SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
	236	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
	237	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
	238	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
	239	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
	240	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
	241	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
	242	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
18f02545 IJ	243	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
	244	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
	245	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b	246	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3 DM	247	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
785957d3 DM	248	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
111cc8b9 IJ	249	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
	250	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
	251	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8 ED	252	SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
6cce09f8 ED	253	SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5	254	SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755	255	SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510	256	SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc ED	257	SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
946cedcc ED	258	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
1da177e4 LT	259	SNMP_MIB_SENTINEL
	260	};
	261
b971e7ac ED	262	static void icmpmsg_put_line(struct seq_file seq, unsigned long vals,
	263	unsigned short *type, int count)
	264	{
	265	int j;
	266
	267	if (count) {
	268	seq_printf(seq, "\nIcmpMsg:");
	269	for (j = 0; j < count; ++j)
	270	seq_printf(seq, " %sType%u",
	271	type[j] & 0x100 ? "Out" : "In",
	272	type[j] & 0xff);
	273	seq_printf(seq, "\nIcmpMsg:");
	274	for (j = 0; j < count; ++j)
	275	seq_printf(seq, " %lu", vals[j]);
	276	}
	277	}
	278
96793b48 DS	279	static void icmpmsg_put(struct seq_file *seq)
	280	{
	281	#define PERLINE 16
	282
b971e7ac ED	283	int i, count;
	284	unsigned short type[PERLINE];
	285	unsigned long vals[PERLINE], val;
229bf0cb	286	struct net *net = seq->private;
96793b48 DS	287
	288	count = 0;
	289	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3	290	val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac ED	291	if (val) {
	292	type[count] = i;
	293	vals[count++] = val;
	294	}
	295	if (count == PERLINE) {
	296	icmpmsg_put_line(seq, vals, type, count);
	297	count = 0;
	298	}
96793b48	299	}
b971e7ac	300	icmpmsg_put_line(seq, vals, type, count);
96793b48 DS	301
	302	#undef PERLINE
	303	}
	304
	305	static void icmp_put(struct seq_file *seq)
	306	{
	307	int i;
229bf0cb	308	struct net *net = seq->private;
acb32ba3	309	atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48 DS	310
	311	seq_puts(seq, "\nIcmp: InMsgs InErrors");
	312	for (i=0; icmpmibmap[i].name != NULL; i++)
	313	seq_printf(seq, " In%s", icmpmibmap[i].name);
	314	seq_printf(seq, " OutMsgs OutErrors");
	315	for (i=0; icmpmibmap[i].name != NULL; i++)
	316	seq_printf(seq, " Out%s", icmpmibmap[i].name);
	317	seq_printf(seq, "\nIcmp: %lu %lu",
7d720c3e TH	318	snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
7d720c3e TH	319	snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
96793b48 DS	320	for (i=0; icmpmibmap[i].name != NULL; i++)
96793b48 DS	321	seq_printf(seq, " %lu",
acb32ba3	322	atomic_long_read(ptr + icmpmibmap[i].index));
96793b48	323	seq_printf(seq, " %lu %lu",
7d720c3e TH	324	snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
7d720c3e TH	325	snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
96793b48 DS	326	for (i=0; icmpmibmap[i].name != NULL; i++)
96793b48 DS	327	seq_printf(seq, " %lu",
acb32ba3	328	atomic_long_read(ptr + (icmpmibmap[i].index \| 0x100)));
96793b48 DS	329	}
96793b48 DS	330
1da177e4 LT	331	/*
	332	* Called from the PROCfs module. This outputs /proc/net/snmp.
	333	*/
	334	static int snmp_seq_show(struct seq_file seq, void v)
	335	{
	336	int i;
229bf0cb	337	struct net *net = seq->private;
1da177e4 LT	338
	339	seq_puts(seq, "Ip: Forwarding DefaultTTL");
	340
	341	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
	342	seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
	343
	344	seq_printf(seq, "\nIp: %d %d",
8e3461d0	345	IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
586f1211	346	sysctl_ip_default_ttl);
1da177e4	347
4ce3c183	348	BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
1da177e4	349	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
4ce3c183 ED	350	seq_printf(seq, " %llu",
	351	snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
	352	snmp4_ipstats_list[i].entry,
	353	offsetof(struct ipstats_mib, syncp)));
1da177e4	354
96793b48 DS	355	icmp_put(seq); /* RFC 2011 compatibility */
96793b48 DS	356	icmpmsg_put(seq);
1da177e4 LT	357
	358	seq_puts(seq, "\nTcp:");
	359	for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
	360	seq_printf(seq, " %s", snmp4_tcp_list[i].name);
	361
	362	seq_puts(seq, "\nTcp:");
	363	for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
	364	/* MaxConn field is signed, RFC 2012 */
	365	if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
	366	seq_printf(seq, " %ld",
7d720c3e	367	snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
5e0f0435	368	snmp4_tcp_list[i].entry));
1da177e4 LT	369	else
1da177e4 LT	370	seq_printf(seq, " %lu",
7d720c3e	371	snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
5e0f0435	372	snmp4_tcp_list[i].entry));
1da177e4 LT	373	}
	374
	375	seq_puts(seq, "\nUdp:");
	376	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	377	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	378
	379	seq_puts(seq, "\nUdp:");
	380	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	381	seq_printf(seq, " %lu",
7d720c3e	382	snmp_fold_field((void __percpu **)net->mib.udp_statistics,
5e0f0435	383	snmp4_udp_list[i].entry));
1da177e4	384
ba4e58ec GR	385	/* the UDP and UDP-Lite MIBs are the same */
	386	seq_puts(seq, "\nUdpLite:");
	387	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	388	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	389
	390	seq_puts(seq, "\nUdpLite:");
	391	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	392	seq_printf(seq, " %lu",
7d720c3e	393	snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
5e0f0435	394	snmp4_udp_list[i].entry));
db8dac20	395
1da177e4 LT	396	seq_putc(seq, '\n');
	397	return 0;
	398	}
	399
	400	static int snmp_seq_open(struct inode inode, struct file file)
	401	{
de05c557	402	return single_open_net(inode, file, snmp_seq_show);
229bf0cb PE	403	}
229bf0cb PE	404
9a32144e	405	static const struct file_operations snmp_seq_fops = {
1da177e4 LT	406	.owner = THIS_MODULE,
	407	.open = snmp_seq_open,
	408	.read = seq_read,
	409	.llseek = seq_lseek,
b6fcbdb4	410	.release = single_release_net,
1da177e4 LT	411	};
1da177e4 LT	412
96793b48 DS	413
96793b48 DS	414
1da177e4 LT	415	/*
	416	* Output /proc/net/netstat
	417	*/
	418	static int netstat_seq_show(struct seq_file seq, void v)
	419	{
	420	int i;
7b7a9dfd	421	struct net *net = seq->private;
1da177e4 LT	422
	423	seq_puts(seq, "TcpExt:");
	424	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	425	seq_printf(seq, " %s", snmp4_net_list[i].name);
	426
	427	seq_puts(seq, "\nTcpExt:");
	428	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	429	seq_printf(seq, " %lu",
7d720c3e	430	snmp_fold_field((void __percpu **)net->mib.net_statistics,
5e0f0435	431	snmp4_net_list[i].entry));
1da177e4	432
d831666e MC	433	seq_puts(seq, "\nIpExt:");
	434	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
	435	seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
	436
	437	seq_puts(seq, "\nIpExt:");
	438	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
4ce3c183 ED	439	seq_printf(seq, " %llu",
	440	snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
	441	snmp4_ipextstats_list[i].entry,
	442	offsetof(struct ipstats_mib, syncp)));
d831666e	443
1da177e4 LT	444	seq_putc(seq, '\n');
	445	return 0;
	446	}
	447
	448	static int netstat_seq_open(struct inode inode, struct file file)
	449	{
de05c557	450	return single_open_net(inode, file, netstat_seq_show);
7b7a9dfd PE	451	}
7b7a9dfd PE	452
9a32144e	453	static const struct file_operations netstat_seq_fops = {
1da177e4 LT	454	.owner = THIS_MODULE,
	455	.open = netstat_seq_open,
	456	.read = seq_read,
	457	.llseek = seq_lseek,
b6fcbdb4	458	.release = single_release_net,
1da177e4 LT	459	};
1da177e4 LT	460
d0538ca3 PE	461	static __net_init int ip_proc_init_net(struct net *net)
	462	{
	463	if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
60bdde95	464	goto out_sockstat;
7b7a9dfd PE	465	if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
7b7a9dfd PE	466	goto out_netstat;
229bf0cb PE	467	if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
229bf0cb PE	468	goto out_snmp;
7b7a9dfd	469
d0538ca3	470	return 0;
7b7a9dfd	471
229bf0cb PE	472	out_snmp:
229bf0cb PE	473	proc_net_remove(net, "netstat");
7b7a9dfd PE	474	out_netstat:
7b7a9dfd PE	475	proc_net_remove(net, "sockstat");
60bdde95	476	out_sockstat:
7b7a9dfd	477	return -ENOMEM;
d0538ca3 PE	478	}
	479
	480	static __net_exit void ip_proc_exit_net(struct net *net)
	481	{
229bf0cb	482	proc_net_remove(net, "snmp");
7b7a9dfd	483	proc_net_remove(net, "netstat");
d0538ca3 PE	484	proc_net_remove(net, "sockstat");
	485	}
	486
	487	static __net_initdata struct pernet_operations ip_proc_ops = {
	488	.init = ip_proc_init_net,
	489	.exit = ip_proc_exit_net,
	490	};
	491
1da177e4 LT	492	int __init ip_misc_proc_init(void)
1da177e4 LT	493	{
60bdde95	494	return register_pernet_subsys(&ip_proc_ops);
1da177e4	495	}
33490170	496