xref: /openbmc/linux/net/ipv4/proc.c (revision 80ecbd24)
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  * 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>
35 #include <net/net_namespace.h>
36 #include <net/icmp.h>
37 #include <net/protocol.h>
38 #include <net/tcp.h>
39 #include <net/udp.h>
40 #include <net/udplite.h>
41 #include <linux/bottom_half.h>
42 #include <linux/inetdevice.h>
43 #include <linux/proc_fs.h>
44 #include <linux/seq_file.h>
45 #include <linux/export.h>
46 #include <net/sock.h>
47 #include <net/raw.h>
48 
49 /*
50  *	Report socket allocation statistics [mea@utu.fi]
51  */
52 static int sockstat_seq_show(struct seq_file *seq, void *v)
53 {
54 	struct net *net = seq->private;
55 	int orphans, sockets;
56 
57 	local_bh_disable();
58 	orphans = percpu_counter_sum_positive(&tcp_orphan_count);
59 	sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
60 	local_bh_enable();
61 
62 	socket_seq_show(seq);
63 	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
64 		   sock_prot_inuse_get(net, &tcp_prot), orphans,
65 		   tcp_death_row.tw_count, sockets,
66 		   proto_memory_allocated(&tcp_prot));
67 	seq_printf(seq, "UDP: inuse %d mem %ld\n",
68 		   sock_prot_inuse_get(net, &udp_prot),
69 		   proto_memory_allocated(&udp_prot));
70 	seq_printf(seq, "UDPLITE: inuse %d\n",
71 		   sock_prot_inuse_get(net, &udplite_prot));
72 	seq_printf(seq, "RAW: inuse %d\n",
73 		   sock_prot_inuse_get(net, &raw_prot));
74 	seq_printf(seq,  "FRAG: inuse %d memory %d\n",
75 			ip_frag_nqueues(net), ip_frag_mem(net));
76 	return 0;
77 }
78 
79 static int sockstat_seq_open(struct inode *inode, struct file *file)
80 {
81 	return single_open_net(inode, file, sockstat_seq_show);
82 }
83 
84 static const struct file_operations sockstat_seq_fops = {
85 	.owner	 = THIS_MODULE,
86 	.open	 = sockstat_seq_open,
87 	.read	 = seq_read,
88 	.llseek	 = seq_lseek,
89 	.release = single_release_net,
90 };
91 
92 /* snmp items */
93 static const struct snmp_mib snmp4_ipstats_list[] = {
94 	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
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),
101 	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
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 
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),
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),
128 	SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
129 	SNMP_MIB_SENTINEL
130 };
131 
132 static const struct {
133 	const char *name;
134 	int index;
135 } icmpmibmap[] = {
136 	{ "DestUnreachs", ICMP_DEST_UNREACH },
137 	{ "TimeExcds", ICMP_TIME_EXCEEDED },
138 	{ "ParmProbs", ICMP_PARAMETERPROB },
139 	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
140 	{ "Redirects", ICMP_REDIRECT },
141 	{ "Echos", ICMP_ECHO },
142 	{ "EchoReps", ICMP_ECHOREPLY },
143 	{ "Timestamps", ICMP_TIMESTAMP },
144 	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
145 	{ "AddrMasks", ICMP_ADDRESS },
146 	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
147 	{ NULL, 0 }
148 };
149 
150 
151 static const struct snmp_mib snmp4_tcp_list[] = {
152 	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
153 	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
154 	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
155 	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
156 	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
157 	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
158 	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
159 	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
160 	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
161 	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
162 	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
163 	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
164 	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
165 	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
166 	SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
167 	SNMP_MIB_SENTINEL
168 };
169 
170 static const struct snmp_mib snmp4_udp_list[] = {
171 	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
172 	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
173 	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
174 	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
175 	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
176 	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
177 	SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
178 	SNMP_MIB_SENTINEL
179 };
180 
181 static const struct snmp_mib snmp4_net_list[] = {
182 	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
183 	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
184 	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
185 	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
186 	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
187 	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
188 	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
189 	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
190 	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
191 	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
192 	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
193 	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
194 	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
195 	SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
196 	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
197 	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
198 	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
199 	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
200 	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
201 	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
202 	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
203 	SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
204 	SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
205 	SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
206 	SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
207 	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
208 	SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
209 	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
210 	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
211 	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
212 	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
213 	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
214 	SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
215 	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
216 	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
217 	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
218 	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
219 	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
220 	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
221 	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
222 	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
223 	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
224 	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
225 	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
226 	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
227 	SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
228 	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
229 	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
230 	SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
231 	SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
232 	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
233 	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
234 	SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
235 	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
236 	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
237 	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
238 	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
239 	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
240 	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
241 	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
242 	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
243 	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
244 	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
245 	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
246 	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
247 	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
248 	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
249 	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
250 	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
251 	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
252 	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
253 	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
254 	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
255 	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
256 	SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
257 	SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
258 	SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
259 	SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
260 	SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
261 	SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
262 	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
263 	SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
264 	SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
265 	SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
266 	SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
267 	SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
268 	SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
269 	SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
270 	SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
271 	SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
272 	SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
273 	SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
274 	SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
275 	SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
276 	SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
277 	SNMP_MIB_SENTINEL
278 };
279 
280 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
281 			     unsigned short *type, int count)
282 {
283 	int j;
284 
285 	if (count) {
286 		seq_printf(seq, "\nIcmpMsg:");
287 		for (j = 0; j < count; ++j)
288 			seq_printf(seq, " %sType%u",
289 				type[j] & 0x100 ? "Out" : "In",
290 				type[j] & 0xff);
291 		seq_printf(seq, "\nIcmpMsg:");
292 		for (j = 0; j < count; ++j)
293 			seq_printf(seq, " %lu", vals[j]);
294 	}
295 }
296 
297 static void icmpmsg_put(struct seq_file *seq)
298 {
299 #define PERLINE	16
300 
301 	int i, count;
302 	unsigned short type[PERLINE];
303 	unsigned long vals[PERLINE], val;
304 	struct net *net = seq->private;
305 
306 	count = 0;
307 	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
308 		val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
309 		if (val) {
310 			type[count] = i;
311 			vals[count++] = val;
312 		}
313 		if (count == PERLINE) {
314 			icmpmsg_put_line(seq, vals, type, count);
315 			count = 0;
316 		}
317 	}
318 	icmpmsg_put_line(seq, vals, type, count);
319 
320 #undef PERLINE
321 }
322 
323 static void icmp_put(struct seq_file *seq)
324 {
325 	int i;
326 	struct net *net = seq->private;
327 	atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
328 
329 	seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
330 	for (i=0; icmpmibmap[i].name != NULL; i++)
331 		seq_printf(seq, " In%s", icmpmibmap[i].name);
332 	seq_printf(seq, " OutMsgs OutErrors");
333 	for (i=0; icmpmibmap[i].name != NULL; i++)
334 		seq_printf(seq, " Out%s", icmpmibmap[i].name);
335 	seq_printf(seq, "\nIcmp: %lu %lu %lu",
336 		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
337 		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS),
338 		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
339 	for (i=0; icmpmibmap[i].name != NULL; i++)
340 		seq_printf(seq, " %lu",
341 			   atomic_long_read(ptr + icmpmibmap[i].index));
342 	seq_printf(seq, " %lu %lu",
343 		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
344 		snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
345 	for (i=0; icmpmibmap[i].name != NULL; i++)
346 		seq_printf(seq, " %lu",
347 			   atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
348 }
349 
350 /*
351  *	Called from the PROCfs module. This outputs /proc/net/snmp.
352  */
353 static int snmp_seq_show(struct seq_file *seq, void *v)
354 {
355 	int i;
356 	struct net *net = seq->private;
357 
358 	seq_puts(seq, "Ip: Forwarding DefaultTTL");
359 
360 	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
361 		seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
362 
363 	seq_printf(seq, "\nIp: %d %d",
364 		   IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
365 		   sysctl_ip_default_ttl);
366 
367 	BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
368 	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
369 		seq_printf(seq, " %llu",
370 			   snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
371 					     snmp4_ipstats_list[i].entry,
372 					     offsetof(struct ipstats_mib, syncp)));
373 
374 	icmp_put(seq);	/* RFC 2011 compatibility */
375 	icmpmsg_put(seq);
376 
377 	seq_puts(seq, "\nTcp:");
378 	for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
379 		seq_printf(seq, " %s", snmp4_tcp_list[i].name);
380 
381 	seq_puts(seq, "\nTcp:");
382 	for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
383 		/* MaxConn field is signed, RFC 2012 */
384 		if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
385 			seq_printf(seq, " %ld",
386 				   snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
387 						   snmp4_tcp_list[i].entry));
388 		else
389 			seq_printf(seq, " %lu",
390 				   snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
391 						   snmp4_tcp_list[i].entry));
392 	}
393 
394 	seq_puts(seq, "\nUdp:");
395 	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
396 		seq_printf(seq, " %s", snmp4_udp_list[i].name);
397 
398 	seq_puts(seq, "\nUdp:");
399 	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
400 		seq_printf(seq, " %lu",
401 			   snmp_fold_field((void __percpu **)net->mib.udp_statistics,
402 					   snmp4_udp_list[i].entry));
403 
404 	/* the UDP and UDP-Lite MIBs are the same */
405 	seq_puts(seq, "\nUdpLite:");
406 	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
407 		seq_printf(seq, " %s", snmp4_udp_list[i].name);
408 
409 	seq_puts(seq, "\nUdpLite:");
410 	for (i = 0; snmp4_udp_list[i].name != NULL; i++)
411 		seq_printf(seq, " %lu",
412 			   snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
413 					   snmp4_udp_list[i].entry));
414 
415 	seq_putc(seq, '\n');
416 	return 0;
417 }
418 
419 static int snmp_seq_open(struct inode *inode, struct file *file)
420 {
421 	return single_open_net(inode, file, snmp_seq_show);
422 }
423 
424 static const struct file_operations snmp_seq_fops = {
425 	.owner	 = THIS_MODULE,
426 	.open	 = snmp_seq_open,
427 	.read	 = seq_read,
428 	.llseek	 = seq_lseek,
429 	.release = single_release_net,
430 };
431 
432 
433 
434 /*
435  *	Output /proc/net/netstat
436  */
437 static int netstat_seq_show(struct seq_file *seq, void *v)
438 {
439 	int i;
440 	struct net *net = seq->private;
441 
442 	seq_puts(seq, "TcpExt:");
443 	for (i = 0; snmp4_net_list[i].name != NULL; i++)
444 		seq_printf(seq, " %s", snmp4_net_list[i].name);
445 
446 	seq_puts(seq, "\nTcpExt:");
447 	for (i = 0; snmp4_net_list[i].name != NULL; i++)
448 		seq_printf(seq, " %lu",
449 			   snmp_fold_field((void __percpu **)net->mib.net_statistics,
450 					   snmp4_net_list[i].entry));
451 
452 	seq_puts(seq, "\nIpExt:");
453 	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
454 		seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
455 
456 	seq_puts(seq, "\nIpExt:");
457 	for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
458 		seq_printf(seq, " %llu",
459 			   snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
460 					     snmp4_ipextstats_list[i].entry,
461 					     offsetof(struct ipstats_mib, syncp)));
462 
463 	seq_putc(seq, '\n');
464 	return 0;
465 }
466 
467 static int netstat_seq_open(struct inode *inode, struct file *file)
468 {
469 	return single_open_net(inode, file, netstat_seq_show);
470 }
471 
472 static const struct file_operations netstat_seq_fops = {
473 	.owner	 = THIS_MODULE,
474 	.open	 = netstat_seq_open,
475 	.read	 = seq_read,
476 	.llseek	 = seq_lseek,
477 	.release = single_release_net,
478 };
479 
480 static __net_init int ip_proc_init_net(struct net *net)
481 {
482 	if (!proc_create("sockstat", S_IRUGO, net->proc_net,
483 			 &sockstat_seq_fops))
484 		goto out_sockstat;
485 	if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
486 		goto out_netstat;
487 	if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
488 		goto out_snmp;
489 
490 	return 0;
491 
492 out_snmp:
493 	remove_proc_entry("netstat", net->proc_net);
494 out_netstat:
495 	remove_proc_entry("sockstat", net->proc_net);
496 out_sockstat:
497 	return -ENOMEM;
498 }
499 
500 static __net_exit void ip_proc_exit_net(struct net *net)
501 {
502 	remove_proc_entry("snmp", net->proc_net);
503 	remove_proc_entry("netstat", net->proc_net);
504 	remove_proc_entry("sockstat", net->proc_net);
505 }
506 
507 static __net_initdata struct pernet_operations ip_proc_ops = {
508 	.init = ip_proc_init_net,
509 	.exit = ip_proc_exit_net,
510 };
511 
512 int __init ip_misc_proc_init(void)
513 {
514 	return register_pernet_subsys(&ip_proc_ops);
515 }
516 
517