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bnx2x: Mark expected switch fall-throughs
[mirror_ubuntu-jammy-kernel.git] / net / ipv4 / proc.c
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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>
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
f22d5c49
JH		 49#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
50
1da177e4
LT		 51/*
52 * Report socket allocation statistics [mea@utu.fi]
53 */
54static int sockstat_seq_show(struct seq_file *seq, void *v)
55{
fd4e7b50 56 struct net *net = seq->private;
eb4dea58
HX		 57 int orphans, sockets;
58
1c10c49d 59 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
180d8cd9 60 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
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 64 sock_prot_inuse_get(net, &tcp_prot), orphans,
1946e672 65 atomic_read(&net->ipv4.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));
3e67f106 74 seq_printf(seq, "FRAG: inuse %u memory %lu\n",
6befe4a7
ED		 75 atomic_read(&net->ipv4.frags.rhashtable.nelems),
76 frag_mem_limit(&net->ipv4.frags));
1da177e4
LT		 77 return 0;
78}
79
1da177e4 80/* snmp items */
9b5b5cff 81static const struct snmp_mib snmp4_ipstats_list[] = {
edf391ff 82 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
1da177e4
LT		 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),
edf391ff 89 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
1da177e4
LT		 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
1f07d03e 102/* Following items are displayed in /proc/net/netstat */
d831666e
MC		 103static 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),
edf391ff
NH		 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),
1f07d03e 116 /* Non RFC4293 fields */
6a5dc9e5 117 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
1f07d03e
ED		 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),
d831666e
MC		 122 SNMP_MIB_SENTINEL
123};
124
5833929c
AD		 125static const struct {
126 const char *name;
96793b48
DS		 127 int index;
128} icmpmibmap[] = {
129 { "DestUnreachs", ICMP_DEST_UNREACH },
130 { "TimeExcds", ICMP_TIME_EXCEEDED },
131 { "ParmProbs", ICMP_PARAMETERPROB },
132 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
133 { "Redirects", ICMP_REDIRECT },
134 { "Echos", ICMP_ECHO },
135 { "EchoReps", ICMP_ECHOREPLY },
136 { "Timestamps", ICMP_TIMESTAMP },
137 { "TimestampReps", ICMP_TIMESTAMPREPLY },
138 { "AddrMasks", ICMP_ADDRESS },
139 { "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc 140 { NULL, 0 }
96793b48
DS		 141};
142
143
9b5b5cff 144static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4
LT		 145 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
146 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
147 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
148 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
149 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
150 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
151 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
152 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
153 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
154 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
155 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
156 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
157 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
158 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
6a5dc9e5 159 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
1da177e4
LT		 160 SNMP_MIB_SENTINEL
161};
162
9b5b5cff 163static const struct snmp_mib snmp4_udp_list[] = {
1da177e4
LT		 164 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
165 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
166 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
167 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c
MB		 168 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
169 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 170 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
36cbb245 171 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
1da177e4
LT		 172 SNMP_MIB_SENTINEL
173};
174
9b5b5cff 175static const struct snmp_mib snmp4_net_list[] = {
1da177e4
LT		 176 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
177 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
178 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
179 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
180 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
181 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
182 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
183 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
184 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
185 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
186 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
187 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
188 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
1da177e4
LT		 189 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
190 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
191 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
192 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
193 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
194 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
195 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
31770e34 196 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
1da177e4 197 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
31770e34 198 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
1da177e4
LT		 199 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
200 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
201 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
1da177e4
LT		 202 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
203 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
204 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
205 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
206 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
207 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
208 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
1da177e4
LT		 209 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
210 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
211 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
212 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
213 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
1da177e4
LT		 214 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
215 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
6ba8a3b1 216 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
9b717a8d 217 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
1da177e4
LT		 218 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
219 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
1da177e4
LT		 220 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
221 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
222 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
223 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
224 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
1da177e4
LT		 225 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
226 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
227 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
228 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
229 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
230 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
231 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
06044751 232 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
18f02545
IJ		 233 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
234 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
235 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b 236 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3
DM		 237 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
238 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
72145a68 239 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
111cc8b9
IJ		 240 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
241 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
242 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8 243 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
8fe809a9 244 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
6cce09f8 245 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5 246 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755 247 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510 248 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc
ED		 249 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
250 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
09e9b813 251 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
c8628155 252 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
a6df1ae9
ED		 253 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
254 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
255 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
282f23c6 256 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
0c24604b 257 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
783237e8 258 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
f19c29e3 259 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
10467163
JC		 260 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
261 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
262 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
263 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
46c2fa39 264 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
0e280af0 265 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
288a9376 266 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
f54b3111 267 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
8e165e20
FW		 268 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
269 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
270 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
f19c29e3
YC		 271 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
272 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
6e3a8a93
ED		 273 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
274 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
275 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
276 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
032ee423
NC		 277 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
278 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
279 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
280 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
281 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
282 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
e520af48
ED		 283 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
284 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
b56ea298
RJ		 285 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
286 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
feb5f2ec
YC		 287 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
288 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
200d95f4 289 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
fb223502 290 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
1da177e4
LT		 291 SNMP_MIB_SENTINEL
292};
293
b971e7ac
ED		 294static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
295 unsigned short *type, int count)
296{
297 int j;
298
299 if (count) {
c9f503b0 300 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 301 for (j = 0; j < count; ++j)
302 seq_printf(seq, " %sType%u",
303 type[j] & 0x100 ? "Out" : "In",
304 type[j] & 0xff);
c9f503b0 305 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 306 for (j = 0; j < count; ++j)
307 seq_printf(seq, " %lu", vals[j]);
308 }
309}
310
96793b48
DS		 311static void icmpmsg_put(struct seq_file *seq)
312{
313#define PERLINE 16
314
b971e7ac
ED		 315 int i, count;
316 unsigned short type[PERLINE];
317 unsigned long vals[PERLINE], val;
229bf0cb 318 struct net *net = seq->private;
96793b48
DS		 319
320 count = 0;
321 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3 322 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac
ED		 323 if (val) {
324 type[count] = i;
325 vals[count++] = val;
326 }
327 if (count == PERLINE) {
328 icmpmsg_put_line(seq, vals, type, count);
329 count = 0;
330 }
96793b48 331 }
b971e7ac 332 icmpmsg_put_line(seq, vals, type, count);
96793b48
DS		 333
334#undef PERLINE
335}
336
337static void icmp_put(struct seq_file *seq)
338{
339 int i;
229bf0cb 340 struct net *net = seq->private;
acb32ba3 341 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48 342
6a5dc9e5 343 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
6d4a741c 344 for (i = 0; icmpmibmap[i].name; i++)
96793b48 345 seq_printf(seq, " In%s", icmpmibmap[i].name);
c9f503b0 346 seq_puts(seq, " OutMsgs OutErrors");
6d4a741c 347 for (i = 0; icmpmibmap[i].name; i++)
96793b48 348 seq_printf(seq, " Out%s", icmpmibmap[i].name);
6a5dc9e5 349 seq_printf(seq, "\nIcmp: %lu %lu %lu",
698365fa
WC		 350 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
351 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
352 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
6d4a741c 353 for (i = 0; icmpmibmap[i].name; i++)
96793b48 354 seq_printf(seq, " %lu",
acb32ba3 355 atomic_long_read(ptr + icmpmibmap[i].index));
96793b48 356 seq_printf(seq, " %lu %lu",
698365fa
WC		 357 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
358 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
6d4a741c 359 for (i = 0; icmpmibmap[i].name; i++)
96793b48 360 seq_printf(seq, " %lu",
acb32ba3 361 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
96793b48
DS		 362}
363
1da177e4
LT		 364/*
365 * Called from the PROCfs module. This outputs /proc/net/snmp.
366 */
f22d5c49 367static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
1da177e4 368{
229bf0cb 369 struct net *net = seq->private;
f22d5c49
JH		 370 u64 buff64[IPSTATS_MIB_MAX];
371 int i;
1da177e4 372
f22d5c49 373 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
1da177e4 374
f22d5c49 375 seq_puts(seq, "Ip: Forwarding DefaultTTL");
6d4a741c 376 for (i = 0; snmp4_ipstats_list[i].name; i++)
1da177e4
LT		 377 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
378
379 seq_printf(seq, "\nIp: %d %d",
8e3461d0 380 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
fa50d974 381 net->ipv4.sysctl_ip_default_ttl);
1da177e4 382
4ce3c183 383 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
f22d5c49
JH		 384 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
385 net->mib.ip_statistics,
386 offsetof(struct ipstats_mib, syncp));
6d4a741c 387 for (i = 0; snmp4_ipstats_list[i].name; i++)
f22d5c49 388 seq_printf(seq, " %llu", buff64[i]);
1da177e4 389
f22d5c49
JH		 390 return 0;
391}
392
393static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
394{
395 unsigned long buff[TCPUDP_MIB_MAX];
396 struct net *net = seq->private;
397 int i;
398
399 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4
LT		 400
401 seq_puts(seq, "\nTcp:");
6d4a741c 402 for (i = 0; snmp4_tcp_list[i].name; i++)
1da177e4
LT		 403 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
404
405 seq_puts(seq, "\nTcp:");
f22d5c49
JH		 406 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
407 net->mib.tcp_statistics);
6d4a741c 408 for (i = 0; snmp4_tcp_list[i].name; i++) {
1da177e4
LT		 409 /* MaxConn field is signed, RFC 2012 */
410 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
f22d5c49 411 seq_printf(seq, " %ld", buff[i]);
1da177e4 412 else
f22d5c49 413 seq_printf(seq, " %lu", buff[i]);
1da177e4
LT		 414 }
415
f22d5c49
JH		 416 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
417
418 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
419 net->mib.udp_statistics);
1da177e4 420 seq_puts(seq, "\nUdp:");
6d4a741c 421 for (i = 0; snmp4_udp_list[i].name; i++)
1da177e4 422 seq_printf(seq, " %s", snmp4_udp_list[i].name);
1da177e4 423 seq_puts(seq, "\nUdp:");
6d4a741c 424 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49
JH		 425 seq_printf(seq, " %lu", buff[i]);
426
427 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4 428
ba4e58ec
GR		 429 /* the UDP and UDP-Lite MIBs are the same */
430 seq_puts(seq, "\nUdpLite:");
f22d5c49
JH		 431 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
432 net->mib.udplite_statistics);
6d4a741c 433 for (i = 0; snmp4_udp_list[i].name; i++)
ba4e58ec 434 seq_printf(seq, " %s", snmp4_udp_list[i].name);
ba4e58ec 435 seq_puts(seq, "\nUdpLite:");
6d4a741c 436 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49 437 seq_printf(seq, " %lu", buff[i]);
db8dac20 438
1da177e4
LT		 439 seq_putc(seq, '\n');
440 return 0;
441}
442
f22d5c49
JH		 443static int snmp_seq_show(struct seq_file *seq, void *v)
444{
445 snmp_seq_show_ipstats(seq, v);
446
447 icmp_put(seq); /* RFC 2011 compatibility */
448 icmpmsg_put(seq);
449
450 snmp_seq_show_tcp_udp(seq, v);
451
452 return 0;
453}
454
1da177e4
LT		 455/*
456 * Output /proc/net/netstat
457 */
458static int netstat_seq_show(struct seq_file *seq, void *v)
459{
460 int i;
7b7a9dfd 461 struct net *net = seq->private;
1da177e4
LT		 462
463 seq_puts(seq, "TcpExt:");
6d4a741c 464 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4
LT		 465 seq_printf(seq, " %s", snmp4_net_list[i].name);
466
467 seq_puts(seq, "\nTcpExt:");
6d4a741c 468 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4 469 seq_printf(seq, " %lu",
698365fa 470 snmp_fold_field(net->mib.net_statistics,
5e0f0435 471 snmp4_net_list[i].entry));
1da177e4 472
d831666e 473 seq_puts(seq, "\nIpExt:");
6d4a741c 474 for (i = 0; snmp4_ipextstats_list[i].name; i++)
d831666e
MC		 475 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
476
477 seq_puts(seq, "\nIpExt:");
6d4a741c 478 for (i = 0; snmp4_ipextstats_list[i].name; i++)
4ce3c183 479 seq_printf(seq, " %llu",
698365fa 480 snmp_fold_field64(net->mib.ip_statistics,
4ce3c183
ED		 481 snmp4_ipextstats_list[i].entry,
482 offsetof(struct ipstats_mib, syncp)));
d831666e 483
1da177e4
LT		 484 seq_putc(seq, '\n');
485 return 0;
486}
487
d0538ca3
PE		 488static __net_init int ip_proc_init_net(struct net *net)
489{
3617d949
CH		 490 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
491 sockstat_seq_show, NULL))
60bdde95 492 goto out_sockstat;
3617d949
CH		 493 if (!proc_create_net_single("netstat", 0444, net->proc_net,
494 netstat_seq_show, NULL))
7b7a9dfd 495 goto out_netstat;
3617d949
CH		 496 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
497 NULL))
229bf0cb 498 goto out_snmp;
7b7a9dfd 499
d0538ca3 500 return 0;
7b7a9dfd 501
229bf0cb 502out_snmp:
ece31ffd 503 remove_proc_entry("netstat", net->proc_net);
7b7a9dfd 504out_netstat:
ece31ffd 505 remove_proc_entry("sockstat", net->proc_net);
60bdde95 506out_sockstat:
7b7a9dfd 507 return -ENOMEM;
d0538ca3
PE		 508}
509
510static __net_exit void ip_proc_exit_net(struct net *net)
511{
ece31ffd
G		 512 remove_proc_entry("snmp", net->proc_net);
513 remove_proc_entry("netstat", net->proc_net);
514 remove_proc_entry("sockstat", net->proc_net);
d0538ca3
PE		 515}
516
517static __net_initdata struct pernet_operations ip_proc_ops = {
518 .init = ip_proc_init_net,
519 .exit = ip_proc_exit_net,
520};
521
1da177e4
LT		 522int __init ip_misc_proc_init(void)
523{
60bdde95 524 return register_pernet_subsys(&ip_proc_ops);
1da177e4 525}
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