GNU Linux-libre 4.19.211-gnu1
[releases.git] / net / ipv4 / proc.c
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 #define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
50
51 /*
52  *      Report socket allocation statistics [mea@utu.fi]
53  */
54 static int sockstat_seq_show(struct seq_file *seq, void *v)
55 {
56         struct net *net = seq->private;
57         int orphans, sockets;
58
59         orphans = percpu_counter_sum_positive(&tcp_orphan_count);
60         sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
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                    atomic_read(&net->ipv4.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 %u memory %lu\n",
75                    atomic_read(&net->ipv4.frags.rhashtable.nelems),
76                    frag_mem_limit(&net->ipv4.frags));
77         return 0;
78 }
79
80 /* snmp items */
81 static const struct snmp_mib snmp4_ipstats_list[] = {
82         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
83         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
84         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
85         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
86         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
87         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
88         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
89         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
90         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
91         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
92         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
93         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
94         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
95         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
96         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
97         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
98         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
99         SNMP_MIB_SENTINEL
100 };
101
102 /* Following items are displayed in /proc/net/netstat */
103 static const struct snmp_mib snmp4_ipextstats_list[] = {
104         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
105         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
106         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
107         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
108         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
109         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
110         SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
111         SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
112         SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
113         SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
114         SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
115         SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
116         /* Non RFC4293 fields */
117         SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
118         SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
119         SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
120         SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
121         SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
122         SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
123         SNMP_MIB_SENTINEL
124 };
125
126 static const struct {
127         const char *name;
128         int index;
129 } icmpmibmap[] = {
130         { "DestUnreachs", ICMP_DEST_UNREACH },
131         { "TimeExcds", ICMP_TIME_EXCEEDED },
132         { "ParmProbs", ICMP_PARAMETERPROB },
133         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
134         { "Redirects", ICMP_REDIRECT },
135         { "Echos", ICMP_ECHO },
136         { "EchoReps", ICMP_ECHOREPLY },
137         { "Timestamps", ICMP_TIMESTAMP },
138         { "TimestampReps", ICMP_TIMESTAMPREPLY },
139         { "AddrMasks", ICMP_ADDRESS },
140         { "AddrMaskReps", ICMP_ADDRESSREPLY },
141         { NULL, 0 }
142 };
143
144
145 static const struct snmp_mib snmp4_tcp_list[] = {
146         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
147         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
148         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
149         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
150         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
151         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
152         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
153         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
154         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
155         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
156         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
157         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
158         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
159         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
160         SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
161         SNMP_MIB_SENTINEL
162 };
163
164 static const struct snmp_mib snmp4_udp_list[] = {
165         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
166         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
167         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
168         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
169         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
170         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
171         SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
172         SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
173         SNMP_MIB_SENTINEL
174 };
175
176 static const struct snmp_mib snmp4_net_list[] = {
177         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
178         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
179         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
180         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
181         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
182         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
183         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
184         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
185         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
186         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
187         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
188         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
189         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
190         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
191         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
192         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
193         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
194         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
195         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
196         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
197         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
198         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
199         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
200         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
201         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
202         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
203         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
204         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
205         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
206         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
207         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
208         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
209         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
210         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
211         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
212         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
213         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
214         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
215         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
216         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
217         SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
218         SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
219         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
220         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
221         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
222         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
223         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
224         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
225         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
226         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
227         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
228         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
229         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
230         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
231         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
232         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
233         SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
234         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
235         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
236         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
237         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
238         SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
239         SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
240         SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
241         SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
242         SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
243         SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
244         SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
245         SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
246         SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
247         SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
248         SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
249         SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
250         SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
251         SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
252         SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
253         SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
254         SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
255         SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
256         SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
257         SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
258         SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
259         SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
260         SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
261         SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
262         SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
263         SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
264         SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
265         SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
266         SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
267         SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
268         SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
269         SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
270         SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
271         SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
272         SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
273         SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
274         SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
275         SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
276         SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
277         SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
278         SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
279         SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
280         SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
281         SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
282         SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
283         SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
284         SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
285         SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
286         SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
287         SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
288         SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
289         SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
290         SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
291         SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
292         SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
293         SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
294         SNMP_MIB_SENTINEL
295 };
296
297 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
298                              unsigned short *type, int count)
299 {
300         int j;
301
302         if (count) {
303                 seq_puts(seq, "\nIcmpMsg:");
304                 for (j = 0; j < count; ++j)
305                         seq_printf(seq, " %sType%u",
306                                 type[j] & 0x100 ? "Out" : "In",
307                                 type[j] & 0xff);
308                 seq_puts(seq, "\nIcmpMsg:");
309                 for (j = 0; j < count; ++j)
310                         seq_printf(seq, " %lu", vals[j]);
311         }
312 }
313
314 static void icmpmsg_put(struct seq_file *seq)
315 {
316 #define PERLINE 16
317
318         int i, count;
319         unsigned short type[PERLINE];
320         unsigned long vals[PERLINE], val;
321         struct net *net = seq->private;
322
323         count = 0;
324         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
325                 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
326                 if (val) {
327                         type[count] = i;
328                         vals[count++] = val;
329                 }
330                 if (count == PERLINE) {
331                         icmpmsg_put_line(seq, vals, type, count);
332                         count = 0;
333                 }
334         }
335         icmpmsg_put_line(seq, vals, type, count);
336
337 #undef PERLINE
338 }
339
340 static void icmp_put(struct seq_file *seq)
341 {
342         int i;
343         struct net *net = seq->private;
344         atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
345
346         seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
347         for (i = 0; icmpmibmap[i].name; i++)
348                 seq_printf(seq, " In%s", icmpmibmap[i].name);
349         seq_puts(seq, " OutMsgs OutErrors");
350         for (i = 0; icmpmibmap[i].name; i++)
351                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
352         seq_printf(seq, "\nIcmp: %lu %lu %lu",
353                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
354                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
355                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
356         for (i = 0; icmpmibmap[i].name; i++)
357                 seq_printf(seq, " %lu",
358                            atomic_long_read(ptr + icmpmibmap[i].index));
359         seq_printf(seq, " %lu %lu",
360                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
361                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
362         for (i = 0; icmpmibmap[i].name; i++)
363                 seq_printf(seq, " %lu",
364                            atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
365 }
366
367 /*
368  *      Called from the PROCfs module. This outputs /proc/net/snmp.
369  */
370 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
371 {
372         struct net *net = seq->private;
373         u64 buff64[IPSTATS_MIB_MAX];
374         int i;
375
376         memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
377
378         seq_puts(seq, "Ip: Forwarding DefaultTTL");
379         for (i = 0; snmp4_ipstats_list[i].name; i++)
380                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
381
382         seq_printf(seq, "\nIp: %d %d",
383                    IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
384                    net->ipv4.sysctl_ip_default_ttl);
385
386         BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
387         snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
388                                    net->mib.ip_statistics,
389                                    offsetof(struct ipstats_mib, syncp));
390         for (i = 0; snmp4_ipstats_list[i].name; i++)
391                 seq_printf(seq, " %llu", buff64[i]);
392
393         return 0;
394 }
395
396 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
397 {
398         unsigned long buff[TCPUDP_MIB_MAX];
399         struct net *net = seq->private;
400         int i;
401
402         memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
403
404         seq_puts(seq, "\nTcp:");
405         for (i = 0; snmp4_tcp_list[i].name; i++)
406                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
407
408         seq_puts(seq, "\nTcp:");
409         snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
410                                  net->mib.tcp_statistics);
411         for (i = 0; snmp4_tcp_list[i].name; i++) {
412                 /* MaxConn field is signed, RFC 2012 */
413                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
414                         seq_printf(seq, " %ld", buff[i]);
415                 else
416                         seq_printf(seq, " %lu", buff[i]);
417         }
418
419         memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
420
421         snmp_get_cpu_field_batch(buff, snmp4_udp_list,
422                                  net->mib.udp_statistics);
423         seq_puts(seq, "\nUdp:");
424         for (i = 0; snmp4_udp_list[i].name; i++)
425                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
426         seq_puts(seq, "\nUdp:");
427         for (i = 0; snmp4_udp_list[i].name; i++)
428                 seq_printf(seq, " %lu", buff[i]);
429
430         memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
431
432         /* the UDP and UDP-Lite MIBs are the same */
433         seq_puts(seq, "\nUdpLite:");
434         snmp_get_cpu_field_batch(buff, snmp4_udp_list,
435                                  net->mib.udplite_statistics);
436         for (i = 0; snmp4_udp_list[i].name; i++)
437                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
438         seq_puts(seq, "\nUdpLite:");
439         for (i = 0; snmp4_udp_list[i].name; i++)
440                 seq_printf(seq, " %lu", buff[i]);
441
442         seq_putc(seq, '\n');
443         return 0;
444 }
445
446 static int snmp_seq_show(struct seq_file *seq, void *v)
447 {
448         snmp_seq_show_ipstats(seq, v);
449
450         icmp_put(seq);  /* RFC 2011 compatibility */
451         icmpmsg_put(seq);
452
453         snmp_seq_show_tcp_udp(seq, v);
454
455         return 0;
456 }
457
458 /*
459  *      Output /proc/net/netstat
460  */
461 static int netstat_seq_show(struct seq_file *seq, void *v)
462 {
463         int i;
464         struct net *net = seq->private;
465
466         seq_puts(seq, "TcpExt:");
467         for (i = 0; snmp4_net_list[i].name; i++)
468                 seq_printf(seq, " %s", snmp4_net_list[i].name);
469
470         seq_puts(seq, "\nTcpExt:");
471         for (i = 0; snmp4_net_list[i].name; i++)
472                 seq_printf(seq, " %lu",
473                            snmp_fold_field(net->mib.net_statistics,
474                                            snmp4_net_list[i].entry));
475
476         seq_puts(seq, "\nIpExt:");
477         for (i = 0; snmp4_ipextstats_list[i].name; i++)
478                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
479
480         seq_puts(seq, "\nIpExt:");
481         for (i = 0; snmp4_ipextstats_list[i].name; i++)
482                 seq_printf(seq, " %llu",
483                            snmp_fold_field64(net->mib.ip_statistics,
484                                              snmp4_ipextstats_list[i].entry,
485                                              offsetof(struct ipstats_mib, syncp)));
486
487         seq_putc(seq, '\n');
488         return 0;
489 }
490
491 static __net_init int ip_proc_init_net(struct net *net)
492 {
493         if (!proc_create_net_single("sockstat", 0444, net->proc_net,
494                         sockstat_seq_show, NULL))
495                 goto out_sockstat;
496         if (!proc_create_net_single("netstat", 0444, net->proc_net,
497                         netstat_seq_show, NULL))
498                 goto out_netstat;
499         if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
500                         NULL))
501                 goto out_snmp;
502
503         return 0;
504
505 out_snmp:
506         remove_proc_entry("netstat", net->proc_net);
507 out_netstat:
508         remove_proc_entry("sockstat", net->proc_net);
509 out_sockstat:
510         return -ENOMEM;
511 }
512
513 static __net_exit void ip_proc_exit_net(struct net *net)
514 {
515         remove_proc_entry("snmp", net->proc_net);
516         remove_proc_entry("netstat", net->proc_net);
517         remove_proc_entry("sockstat", net->proc_net);
518 }
519
520 static __net_initdata struct pernet_operations ip_proc_ops = {
521         .init = ip_proc_init_net,
522         .exit = ip_proc_exit_net,
523 };
524
525 int __init ip_misc_proc_init(void)
526 {
527         return register_pernet_subsys(&ip_proc_ops);
528 }