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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
[mirror_ubuntu-eoan-kernel.git] / net / ipv4 / proc.c
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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * This file implements the various access functions for the
8 * PROC file system. It is mainly used for debugging and
9 * statistics.
10 *
1da177e4
LT		 11 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
13 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
14 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
15 *
16 * Fixes:
17 * Alan Cox : UDP sockets show the rxqueue/txqueue
18 * using hint flag for the netinfo.
19 * Pauline Middelink : identd support
20 * Alan Cox : Make /proc safer.
21 * Erik Schoenfelder : /proc/net/snmp
22 * Alan Cox : Handle dead sockets properly.
23 * Gerhard Koerting : Show both timers
24 * Alan Cox : Allow inode to be NULL (kernel socket)
25 * Andi Kleen : Add support for open_requests and
26 * split functions for more readibility.
27 * Andi Kleen : Add support for /proc/net/netstat
28 * Arnaldo C. Melo : Convert to seq_file
1da177e4
LT		 29 */
30#include <linux/types.h>
457c4cbc 31#include <net/net_namespace.h>
1da177e4
LT		 32#include <net/icmp.h>
33#include <net/protocol.h>
34#include <net/tcp.h>
35#include <net/udp.h>
ba4e58ec 36#include <net/udplite.h>
eb4dea58 37#include <linux/bottom_half.h>
14c85021 38#include <linux/inetdevice.h>
1da177e4
LT		 39#include <linux/proc_fs.h>
40#include <linux/seq_file.h>
bc3b2d7f 41#include <linux/export.h>
1da177e4
LT		 42#include <net/sock.h>
43#include <net/raw.h>
44
f22d5c49
JH		 45#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
46
1da177e4
LT		 47/*
48 * Report socket allocation statistics [mea@utu.fi]
49 */
50static int sockstat_seq_show(struct seq_file *seq, void *v)
51{
fd4e7b50 52 struct net *net = seq->private;
eb4dea58
HX		 53 int orphans, sockets;
54
1c10c49d 55 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
180d8cd9 56 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
fd4e7b50 57
1da177e4 58 socket_seq_show(seq);
8d987e5c 59 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
eb4dea58 60 sock_prot_inuse_get(net, &tcp_prot), orphans,
1946e672 61 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
180d8cd9 62 proto_memory_allocated(&tcp_prot));
8d987e5c 63 seq_printf(seq, "UDP: inuse %d mem %ld\n",
fd4e7b50 64 sock_prot_inuse_get(net, &udp_prot),
180d8cd9 65 proto_memory_allocated(&udp_prot));
c29a0bc4 66 seq_printf(seq, "UDPLITE: inuse %d\n",
fd4e7b50 67 sock_prot_inuse_get(net, &udplite_prot));
c29a0bc4 68 seq_printf(seq, "RAW: inuse %d\n",
fd4e7b50 69 sock_prot_inuse_get(net, &raw_prot));
3e67f106 70 seq_printf(seq, "FRAG: inuse %u memory %lu\n",
6befe4a7
ED		 71 atomic_read(&net->ipv4.frags.rhashtable.nelems),
72 frag_mem_limit(&net->ipv4.frags));
1da177e4
LT		 73 return 0;
74}
75
1da177e4 76/* snmp items */
9b5b5cff 77static const struct snmp_mib snmp4_ipstats_list[] = {
edf391ff 78 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
1da177e4
LT		 79 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
80 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
81 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
82 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
83 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
84 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
edf391ff 85 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
1da177e4
LT		 86 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
87 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
88 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
89 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
90 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
91 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
92 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
93 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
94 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
95 SNMP_MIB_SENTINEL
96};
97
1f07d03e 98/* Following items are displayed in /proc/net/netstat */
d831666e
MC		 99static const struct snmp_mib snmp4_ipextstats_list[] = {
100 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
101 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
102 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
103 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
104 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
105 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
edf391ff
NH		 106 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
107 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
108 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
109 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
110 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
111 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
1f07d03e 112 /* Non RFC4293 fields */
6a5dc9e5 113 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
1f07d03e
ED		 114 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
115 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
116 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
117 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
7969e5c4 118 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
d831666e
MC		 119 SNMP_MIB_SENTINEL
120};
121
5833929c
AD		 122static const struct {
123 const char *name;
96793b48
DS		 124 int index;
125} icmpmibmap[] = {
126 { "DestUnreachs", ICMP_DEST_UNREACH },
127 { "TimeExcds", ICMP_TIME_EXCEEDED },
128 { "ParmProbs", ICMP_PARAMETERPROB },
129 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
130 { "Redirects", ICMP_REDIRECT },
131 { "Echos", ICMP_ECHO },
132 { "EchoReps", ICMP_ECHOREPLY },
133 { "Timestamps", ICMP_TIMESTAMP },
134 { "TimestampReps", ICMP_TIMESTAMPREPLY },
135 { "AddrMasks", ICMP_ADDRESS },
136 { "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc 137 { NULL, 0 }
96793b48
DS		 138};
139
140
9b5b5cff 141static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4
LT		 142 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
143 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
144 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
145 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
146 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
147 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
148 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
149 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
150 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
151 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
152 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
153 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
154 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
155 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
6a5dc9e5 156 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
1da177e4
LT		 157 SNMP_MIB_SENTINEL
158};
159
9b5b5cff 160static const struct snmp_mib snmp4_udp_list[] = {
1da177e4
LT		 161 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
162 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
163 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
164 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c
MB		 165 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
166 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 167 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
36cbb245 168 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
1da177e4
LT		 169 SNMP_MIB_SENTINEL
170};
171
9b5b5cff 172static const struct snmp_mib snmp4_net_list[] = {
1da177e4
LT		 173 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
174 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
175 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
176 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
177 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
178 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
179 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
180 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
181 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
182 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
183 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
184 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
185 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
1da177e4
LT		 186 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
187 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
188 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
189 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
190 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
191 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
192 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
31770e34 193 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
1da177e4 194 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
31770e34 195 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
1da177e4
LT		 196 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
197 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
198 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
1da177e4
LT		 199 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
200 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
201 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
202 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
203 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
204 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
205 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
1da177e4
LT		 206 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
207 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
208 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
209 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
210 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
1da177e4
LT		 211 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
212 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
6ba8a3b1 213 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
9b717a8d 214 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
1da177e4
LT		 215 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
216 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
1da177e4 217 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
4f693b55 218 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
1da177e4
LT		 219 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
220 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
221 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
222 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
1da177e4
LT		 223 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
224 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
225 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
226 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
227 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
228 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
229 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
06044751 230 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
18f02545
IJ		 231 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
232 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
233 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b 234 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3
DM		 235 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
236 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
72145a68 237 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
111cc8b9
IJ		 238 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
239 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
240 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8 241 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
8fe809a9 242 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
6cce09f8 243 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5 244 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755 245 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510 246 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc
ED		 247 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
248 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
09e9b813 249 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
c8628155 250 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
a6df1ae9
ED		 251 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
252 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
253 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
282f23c6 254 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
0c24604b 255 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
783237e8 256 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
f19c29e3 257 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
10467163
JC		 258 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
259 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
260 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
261 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
46c2fa39 262 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
0e280af0 263 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
288a9376 264 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
f54b3111 265 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
8e165e20
FW		 266 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
267 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
268 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
f19c29e3
YC		 269 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
270 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
6e3a8a93
ED		 271 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
272 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
273 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
274 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
032ee423
NC		 275 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
276 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
277 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
278 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
279 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
280 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
e520af48
ED		 281 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
282 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
b56ea298
RJ		 283 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
284 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
feb5f2ec
YC		 285 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
286 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
200d95f4 287 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
fb223502 288 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
ea5d0c32 289 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
1da177e4
LT		 290 SNMP_MIB_SENTINEL
291};
292
b971e7ac
ED		 293static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
294 unsigned short *type, int count)
295{
296 int j;
297
298 if (count) {
c9f503b0 299 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 300 for (j = 0; j < count; ++j)
301 seq_printf(seq, " %sType%u",
302 type[j] & 0x100 ? "Out" : "In",
303 type[j] & 0xff);
c9f503b0 304 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 305 for (j = 0; j < count; ++j)
306 seq_printf(seq, " %lu", vals[j]);
307 }
308}
309
96793b48
DS		 310static void icmpmsg_put(struct seq_file *seq)
311{
312#define PERLINE 16
313
b971e7ac
ED		 314 int i, count;
315 unsigned short type[PERLINE];
316 unsigned long vals[PERLINE], val;
229bf0cb 317 struct net *net = seq->private;
96793b48
DS		 318
319 count = 0;
320 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3 321 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac
ED		 322 if (val) {
323 type[count] = i;
324 vals[count++] = val;
325 }
326 if (count == PERLINE) {
327 icmpmsg_put_line(seq, vals, type, count);
328 count = 0;
329 }
96793b48 330 }
b971e7ac 331 icmpmsg_put_line(seq, vals, type, count);
96793b48
DS		 332
333#undef PERLINE
334}
335
336static void icmp_put(struct seq_file *seq)
337{
338 int i;
229bf0cb 339 struct net *net = seq->private;
acb32ba3 340 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48 341
6a5dc9e5 342 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
6d4a741c 343 for (i = 0; icmpmibmap[i].name; i++)
96793b48 344 seq_printf(seq, " In%s", icmpmibmap[i].name);
c9f503b0 345 seq_puts(seq, " OutMsgs OutErrors");
6d4a741c 346 for (i = 0; icmpmibmap[i].name; i++)
96793b48 347 seq_printf(seq, " Out%s", icmpmibmap[i].name);
6a5dc9e5 348 seq_printf(seq, "\nIcmp: %lu %lu %lu",
698365fa
WC		 349 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
350 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
351 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
6d4a741c 352 for (i = 0; icmpmibmap[i].name; i++)
96793b48 353 seq_printf(seq, " %lu",
acb32ba3 354 atomic_long_read(ptr + icmpmibmap[i].index));
96793b48 355 seq_printf(seq, " %lu %lu",
698365fa
WC		 356 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
357 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
6d4a741c 358 for (i = 0; icmpmibmap[i].name; i++)
96793b48 359 seq_printf(seq, " %lu",
acb32ba3 360 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
96793b48
DS		 361}
362
1da177e4
LT		 363/*
364 * Called from the PROCfs module. This outputs /proc/net/snmp.
365 */
f22d5c49 366static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
1da177e4 367{
229bf0cb 368 struct net *net = seq->private;
f22d5c49
JH		 369 u64 buff64[IPSTATS_MIB_MAX];
370 int i;
1da177e4 371
f22d5c49 372 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
1da177e4 373
f22d5c49 374 seq_puts(seq, "Ip: Forwarding DefaultTTL");
6d4a741c 375 for (i = 0; snmp4_ipstats_list[i].name; i++)
1da177e4
LT		 376 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
377
378 seq_printf(seq, "\nIp: %d %d",
8e3461d0 379 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
fa50d974 380 net->ipv4.sysctl_ip_default_ttl);
1da177e4 381
4ce3c183 382 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
f22d5c49
JH		 383 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
384 net->mib.ip_statistics,
385 offsetof(struct ipstats_mib, syncp));
6d4a741c 386 for (i = 0; snmp4_ipstats_list[i].name; i++)
f22d5c49 387 seq_printf(seq, " %llu", buff64[i]);
1da177e4 388
f22d5c49
JH		 389 return 0;
390}
391
392static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
393{
394 unsigned long buff[TCPUDP_MIB_MAX];
395 struct net *net = seq->private;
396 int i;
397
398 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4
LT		 399
400 seq_puts(seq, "\nTcp:");
6d4a741c 401 for (i = 0; snmp4_tcp_list[i].name; i++)
1da177e4
LT		 402 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
403
404 seq_puts(seq, "\nTcp:");
f22d5c49
JH		 405 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
406 net->mib.tcp_statistics);
6d4a741c 407 for (i = 0; snmp4_tcp_list[i].name; i++) {
1da177e4
LT		 408 /* MaxConn field is signed, RFC 2012 */
409 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
f22d5c49 410 seq_printf(seq, " %ld", buff[i]);
1da177e4 411 else
f22d5c49 412 seq_printf(seq, " %lu", buff[i]);
1da177e4
LT		 413 }
414
f22d5c49
JH		 415 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
416
417 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
418 net->mib.udp_statistics);
1da177e4 419 seq_puts(seq, "\nUdp:");
6d4a741c 420 for (i = 0; snmp4_udp_list[i].name; i++)
1da177e4 421 seq_printf(seq, " %s", snmp4_udp_list[i].name);
1da177e4 422 seq_puts(seq, "\nUdp:");
6d4a741c 423 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49
JH		 424 seq_printf(seq, " %lu", buff[i]);
425
426 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4 427
ba4e58ec
GR		 428 /* the UDP and UDP-Lite MIBs are the same */
429 seq_puts(seq, "\nUdpLite:");
f22d5c49
JH		 430 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
431 net->mib.udplite_statistics);
6d4a741c 432 for (i = 0; snmp4_udp_list[i].name; i++)
ba4e58ec 433 seq_printf(seq, " %s", snmp4_udp_list[i].name);
ba4e58ec 434 seq_puts(seq, "\nUdpLite:");
6d4a741c 435 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49 436 seq_printf(seq, " %lu", buff[i]);
db8dac20 437
1da177e4
LT		 438 seq_putc(seq, '\n');
439 return 0;
440}
441
f22d5c49
JH		 442static int snmp_seq_show(struct seq_file *seq, void *v)
443{
444 snmp_seq_show_ipstats(seq, v);
445
446 icmp_put(seq); /* RFC 2011 compatibility */
447 icmpmsg_put(seq);
448
449 snmp_seq_show_tcp_udp(seq, v);
450
451 return 0;
452}
453
1da177e4
LT		 454/*
455 * Output /proc/net/netstat
456 */
457static int netstat_seq_show(struct seq_file *seq, void *v)
458{
459 int i;
7b7a9dfd 460 struct net *net = seq->private;
1da177e4
LT		 461
462 seq_puts(seq, "TcpExt:");
6d4a741c 463 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4
LT		 464 seq_printf(seq, " %s", snmp4_net_list[i].name);
465
466 seq_puts(seq, "\nTcpExt:");
6d4a741c 467 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4 468 seq_printf(seq, " %lu",
698365fa 469 snmp_fold_field(net->mib.net_statistics,
5e0f0435 470 snmp4_net_list[i].entry));
1da177e4 471
d831666e 472 seq_puts(seq, "\nIpExt:");
6d4a741c 473 for (i = 0; snmp4_ipextstats_list[i].name; i++)
d831666e
MC		 474 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
475
476 seq_puts(seq, "\nIpExt:");
6d4a741c 477 for (i = 0; snmp4_ipextstats_list[i].name; i++)
4ce3c183 478 seq_printf(seq, " %llu",
698365fa 479 snmp_fold_field64(net->mib.ip_statistics,
4ce3c183
ED		 480 snmp4_ipextstats_list[i].entry,
481 offsetof(struct ipstats_mib, syncp)));
d831666e 482
1da177e4
LT		 483 seq_putc(seq, '\n');
484 return 0;
485}
486
d0538ca3
PE		 487static __net_init int ip_proc_init_net(struct net *net)
488{
3617d949
CH		 489 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
490 sockstat_seq_show, NULL))
60bdde95 491 goto out_sockstat;
3617d949
CH		 492 if (!proc_create_net_single("netstat", 0444, net->proc_net,
493 netstat_seq_show, NULL))
7b7a9dfd 494 goto out_netstat;
3617d949
CH		 495 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
496 NULL))
229bf0cb 497 goto out_snmp;
7b7a9dfd 498
d0538ca3 499 return 0;
7b7a9dfd 500
229bf0cb 501out_snmp:
ece31ffd 502 remove_proc_entry("netstat", net->proc_net);
7b7a9dfd 503out_netstat:
ece31ffd 504 remove_proc_entry("sockstat", net->proc_net);
60bdde95 505out_sockstat:
7b7a9dfd 506 return -ENOMEM;
d0538ca3
PE		 507}
508
509static __net_exit void ip_proc_exit_net(struct net *net)
510{
ece31ffd
G		 511 remove_proc_entry("snmp", net->proc_net);
512 remove_proc_entry("netstat", net->proc_net);
513 remove_proc_entry("sockstat", net->proc_net);
d0538ca3
PE		 514}
515
516static __net_initdata struct pernet_operations ip_proc_ops = {
517 .init = ip_proc_init_net,
518 .exit = ip_proc_exit_net,
519};
520
1da177e4
LT		 521int __init ip_misc_proc_init(void)
522{
60bdde95 523 return register_pernet_subsys(&ip_proc_ops);
1da177e4 524}
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