[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.
 *
 * Version:	$Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
 *
 * 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/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>

#ifdef CONFIG_PROC_FS
static int fold_prot_inuse(struct proto *proto)
{
	int res = 0;
	int cpu;

	for_each_possible_cpu(cpu)
		res += proto->stats[cpu].inuse;

	return res;
}

/*
 *	Report socket allocation statistics [mea@utu.fi]
 */
static int sockstat_seq_show(struct seq_file *seq, void *v)
{
	socket_seq_show(seq);
	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
		   fold_prot_inuse(&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\n", fold_prot_inuse(&udp_prot));
	seq_printf(seq, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot));
	seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
	seq_printf(seq,  "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
		   atomic_read(&ip_frag_mem));
	return 0;
}

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

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

static unsigned long
fold_field(void *mib[], int offt)
{
	unsigned long res = 0;
	int i;

	for_each_possible_cpu(i) {
		res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
		res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
	}
	return res;
}

/* 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
};

static const struct snmp_mib snmp4_icmp_list[] = {
	SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
	SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
	SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
	SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS),
	SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS),
	SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS),
	SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS),
	SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS),
	SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS),
	SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS),
	SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS),
	SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS),
	SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS),
	SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
	SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
	SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS),
	SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS),
	SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS),
	SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS),
	SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS),
	SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS),
	SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS),
	SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS),
	SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS),
	SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS),
	SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS),
	SNMP_MIB_SENTINEL
};

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_SENTINEL
};

/*
 *	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.forwarding ? 1 : 2, sysctl_ip_default_ttl);

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

	seq_puts(seq, "\nIcmp:");
	for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
		seq_printf(seq, " %s", snmp4_icmp_list[i].name);

	seq_puts(seq, "\nIcmp:");
	for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
		seq_printf(seq, " %lu",
			   fold_field((void **) icmp_statistics,
				      snmp4_icmp_list[i].entry));

	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",
				   fold_field((void **) tcp_statistics,
					      snmp4_tcp_list[i].entry));
		else
			seq_printf(seq, " %lu",
				   fold_field((void **) 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",
			   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",
			   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",
			   fold_field((void **) net_statistics,
				      snmp4_net_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,
};

int __init ip_misc_proc_init(void)
{
	int rc = 0;

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

	if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops))
		goto out_snmp;

	if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops))
		goto out_sockstat;
out:
	return rc;
out_sockstat:
	proc_net_remove("snmp");
out_snmp:
	proc_net_remove("netstat");
out_netstat:
	rc = -ENOMEM;
	goto out;
}
#endif

int snmp_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)
{
	BUG_ON(ptr == NULL);
	ptr[0] = __alloc_percpu(mibsize);
	if (!ptr[0])
		goto err0;
	ptr[1] = __alloc_percpu(mibsize);
	if (!ptr[1])
		goto err1;
	return 0;
err1:
	free_percpu(ptr[0]);
	ptr[0] = NULL;
err0:
	return -ENOMEM;
}

void snmp_mib_free(void *ptr[2])
{
	BUG_ON(ptr == NULL);
	free_percpu(ptr[0]);
	free_percpu(ptr[1]);
	ptr[0] = ptr[1] = NULL;
}
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	*
	10	* Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
	11	*
	12	* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
	13	* Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
	14	* Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
	15	* Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
	16	*
	17	* Fixes:
	18	* Alan Cox : UDP sockets show the rxqueue/txqueue
	19	* using hint flag for the netinfo.
	20	* Pauline Middelink : identd support
	21	* Alan Cox : Make /proc safer.
	22	* Erik Schoenfelder : /proc/net/snmp
	23	* Alan Cox : Handle dead sockets properly.
	24	* Gerhard Koerting : Show both timers
	25	* Alan Cox : Allow inode to be NULL (kernel socket)
	26	* Andi Kleen : Add support for open_requests and
	27	* split functions for more readibility.
	28	* Andi Kleen : Add support for /proc/net/netstat
	29	* Arnaldo C. Melo : Convert to seq_file
	30	*
	31	* This program is free software; you can redistribute it and/or
	32	* modify it under the terms of the GNU General Public License
	33	* as published by the Free Software Foundation; either version
	34	* 2 of the License, or (at your option) any later version.
	35	*/
	36	#include <linux/types.h>
	37	#include <net/icmp.h>
	38	#include <net/protocol.h>
	39	#include <net/tcp.h>
	40	#include <net/udp.h>
ba4e58ec	41	#include <net/udplite.h>
14c85021	42	#include <linux/inetdevice.h>
1da177e4 LT	43	#include <linux/proc_fs.h>
	44	#include <linux/seq_file.h>
	45	#include <net/sock.h>
	46	#include <net/raw.h>
	47
bb7ec6df	48	#ifdef CONFIG_PROC_FS
1da177e4 LT	49	static int fold_prot_inuse(struct proto *proto)
	50	{
	51	int res = 0;
	52	int cpu;
	53
6f912042	54	for_each_possible_cpu(cpu)
1da177e4 LT	55	res += proto->stats[cpu].inuse;
	56
	57	return res;
	58	}
	59
	60	/*
	61	* Report socket allocation statistics [mea@utu.fi]
	62	*/
	63	static int sockstat_seq_show(struct seq_file seq, void v)
	64	{
1da177e4 LT	65	socket_seq_show(seq);
	66	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
	67	fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
295ff7ed	68	tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
1da177e4 LT	69	atomic_read(&tcp_memory_allocated));
1da177e4 LT	70	seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
ba4e58ec	71	seq_printf(seq, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot));
1da177e4 LT	72	seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
	73	seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
	74	atomic_read(&ip_frag_mem));
	75	return 0;
	76	}
	77
	78	static int sockstat_seq_open(struct inode inode, struct file file)
	79	{
	80	return single_open(file, sockstat_seq_show, NULL);
	81	}
	82
9a32144e	83	static const struct file_operations sockstat_seq_fops = {
1da177e4 LT	84	.owner = THIS_MODULE,
	85	.open = sockstat_seq_open,
	86	.read = seq_read,
	87	.llseek = seq_lseek,
	88	.release = single_release,
	89	};
	90
	91	static unsigned long
	92	fold_field(void *mib[], int offt)
	93	{
	94	unsigned long res = 0;
	95	int i;
	96
6f912042	97	for_each_possible_cpu(i) {
1da177e4 LT	98	res += (((unsigned long ) per_cpu_ptr(mib[0], i)) + offt);
	99	res += (((unsigned long ) per_cpu_ptr(mib[1], i)) + offt);
	100	}
	101	return res;
	102	}
	103
	104	/* snmp items */
9b5b5cff	105	static const struct snmp_mib snmp4_ipstats_list[] = {
1da177e4 LT	106	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
	107	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
	108	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
	109	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
	110	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
	111	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
	112	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
	113	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
	114	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
	115	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
	116	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
	117	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
	118	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
	119	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
	120	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
	121	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
	122	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
	123	SNMP_MIB_SENTINEL
	124	};
	125
9b5b5cff	126	static const struct snmp_mib snmp4_icmp_list[] = {
1da177e4 LT	127	SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
	128	SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
	129	SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
	130	SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS),
	131	SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS),
	132	SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS),
	133	SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS),
	134	SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS),
	135	SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS),
	136	SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS),
	137	SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS),
	138	SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS),
	139	SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS),
	140	SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
	141	SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
	142	SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS),
	143	SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS),
	144	SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS),
	145	SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS),
	146	SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS),
	147	SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS),
	148	SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS),
	149	SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS),
	150	SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS),
	151	SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS),
	152	SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS),
	153	SNMP_MIB_SENTINEL
	154	};
	155
9b5b5cff	156	static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4 LT	157	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
	158	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
	159	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
	160	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
	161	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
	162	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
	163	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
	164	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
	165	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
	166	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
	167	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
	168	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
	169	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
	170	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
	171	SNMP_MIB_SENTINEL
	172	};
	173
9b5b5cff	174	static const struct snmp_mib snmp4_udp_list[] = {
1da177e4 LT	175	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
	176	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
	177	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
	178	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c MB	179	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
81aa646c MB	180	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
1da177e4 LT	181	SNMP_MIB_SENTINEL
	182	};
	183
9b5b5cff	184	static const struct snmp_mib snmp4_net_list[] = {
1da177e4 LT	185	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
	186	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
	187	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
	188	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
	189	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
	190	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
	191	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
	192	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
	193	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
	194	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
	195	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
	196	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
	197	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
	198	SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
	199	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
	200	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
	201	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
	202	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
	203	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
	204	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
	205	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
	206	SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
	207	SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
	208	SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
	209	SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
	210	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
	211	SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
	212	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
	213	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
	214	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
	215	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
	216	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
	217	SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
	218	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
	219	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
	220	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
	221	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
	222	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
	223	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
	224	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
	225	SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
	226	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
	227	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
	228	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
	229	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
	230	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
	231	SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
	232	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
	233	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
	234	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
	235	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
	236	SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
	237	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
	238	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
	239	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
	240	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
	241	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
	242	SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
	243	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
	244	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
	245	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
	246	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
	247	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
	248	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
249	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
250	SNMP_MIB_SENTINEL
251	};
252
253	/*
254	* Called from the PROCfs module. This outputs /proc/net/snmp.
255	*/
256	static int snmp_seq_show(struct seq_file seq, void v)
257	{
258	int i;
259
260	seq_puts(seq, "Ip: Forwarding DefaultTTL");
261
262	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
263	seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
264
265	seq_printf(seq, "\nIp: %d %d",
266	ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
267
268	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
269	seq_printf(seq, " %lu",
e905a9ed	270	fold_field((void **) ip_statistics,
1da177e4 LT	271	snmp4_ipstats_list[i].entry));
	272
	273	seq_puts(seq, "\nIcmp:");
	274	for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
	275	seq_printf(seq, " %s", snmp4_icmp_list[i].name);
	276
	277	seq_puts(seq, "\nIcmp:");
	278	for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
	279	seq_printf(seq, " %lu",
e905a9ed	280	fold_field((void **) icmp_statistics,
1da177e4 LT	281	snmp4_icmp_list[i].entry));
	282
	283	seq_puts(seq, "\nTcp:");
	284	for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
	285	seq_printf(seq, " %s", snmp4_tcp_list[i].name);
	286
	287	seq_puts(seq, "\nTcp:");
	288	for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
	289	/* MaxConn field is signed, RFC 2012 */
	290	if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
	291	seq_printf(seq, " %ld",
e905a9ed	292	fold_field((void **) tcp_statistics,
1da177e4 LT	293	snmp4_tcp_list[i].entry));
	294	else
	295	seq_printf(seq, " %lu",
	296	fold_field((void **) tcp_statistics,
	297	snmp4_tcp_list[i].entry));
	298	}
	299
	300	seq_puts(seq, "\nUdp:");
	301	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	302	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	303
	304	seq_puts(seq, "\nUdp:");
	305	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	306	seq_printf(seq, " %lu",
e905a9ed	307	fold_field((void **) udp_statistics,
1da177e4 LT	308	snmp4_udp_list[i].entry));
1da177e4 LT	309
ba4e58ec GR	310	/* the UDP and UDP-Lite MIBs are the same */
	311	seq_puts(seq, "\nUdpLite:");
	312	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	313	seq_printf(seq, " %s", snmp4_udp_list[i].name);
	314
	315	seq_puts(seq, "\nUdpLite:");
	316	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
	317	seq_printf(seq, " %lu",
	318	fold_field((void **) udplite_statistics,
	319	snmp4_udp_list[i].entry) );
	320
1da177e4 LT	321	seq_putc(seq, '\n');
	322	return 0;
	323	}
	324
	325	static int snmp_seq_open(struct inode inode, struct file file)
	326	{
	327	return single_open(file, snmp_seq_show, NULL);
	328	}
	329
9a32144e	330	static const struct file_operations snmp_seq_fops = {
1da177e4 LT	331	.owner = THIS_MODULE,
	332	.open = snmp_seq_open,
	333	.read = seq_read,
	334	.llseek = seq_lseek,
	335	.release = single_release,
	336	};
	337
	338	/*
	339	* Output /proc/net/netstat
	340	*/
	341	static int netstat_seq_show(struct seq_file seq, void v)
	342	{
	343	int i;
	344
	345	seq_puts(seq, "TcpExt:");
	346	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	347	seq_printf(seq, " %s", snmp4_net_list[i].name);
	348
	349	seq_puts(seq, "\nTcpExt:");
	350	for (i = 0; snmp4_net_list[i].name != NULL; i++)
	351	seq_printf(seq, " %lu",
e905a9ed	352	fold_field((void **) net_statistics,
1da177e4 LT	353	snmp4_net_list[i].entry));
	354
	355	seq_putc(seq, '\n');
	356	return 0;
	357	}
	358
	359	static int netstat_seq_open(struct inode inode, struct file file)
	360	{
	361	return single_open(file, netstat_seq_show, NULL);
	362	}
	363
9a32144e	364	static const struct file_operations netstat_seq_fops = {
1da177e4 LT	365	.owner = THIS_MODULE,
	366	.open = netstat_seq_open,
	367	.read = seq_read,
	368	.llseek = seq_lseek,
	369	.release = single_release,
	370	};
	371
	372	int __init ip_misc_proc_init(void)
	373	{
	374	int rc = 0;
	375
	376	if (!proc_net_fops_create("netstat", S_IRUGO, &netstat_seq_fops))
	377	goto out_netstat;
	378
	379	if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops))
	380	goto out_snmp;
	381
	382	if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops))
	383	goto out_sockstat;
	384	out:
	385	return rc;
	386	out_sockstat:
	387	proc_net_remove("snmp");
	388	out_snmp:
	389	proc_net_remove("netstat");
	390	out_netstat:
	391	rc = -ENOMEM;
	392	goto out;
	393	}
bb7ec6df	394	#endif
1da177e4	395
33490170 YH	396	int snmp_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)
	397	{
	398	BUG_ON(ptr == NULL);
	399	ptr[0] = __alloc_percpu(mibsize);
	400	if (!ptr[0])
	401	goto err0;
	402	ptr[1] = __alloc_percpu(mibsize);
	403	if (!ptr[1])
	404	goto err1;
	405	return 0;
	406	err1:
	407	free_percpu(ptr[0]);
	408	ptr[0] = NULL;
	409	err0:
	410	return -ENOMEM;
	411	}
	412
	413	void snmp_mib_free(void *ptr[2])
	414	{
	415	BUG_ON(ptr == NULL);
	416	free_percpu(ptr[0]);
	417	free_percpu(ptr[1]);
	418	ptr[0] = ptr[1] = NULL;
	419	}
	420