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tcp: make tcp_space() aware of socket backlog
[mirror_ubuntu-jammy-kernel.git] / net / ipv4 / proc.c
CommitLineData
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),
7969e5c4 122 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
d831666e
MC		 123 SNMP_MIB_SENTINEL
124};
125
5833929c
AD		 126static const struct {
127 const char *name;
96793b48
DS		 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 },
cfcabdcc 141 { NULL, 0 }
96793b48
DS		 142};
143
144
9b5b5cff 145static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4
LT		 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),
6a5dc9e5 160 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
1da177e4
LT		 161 SNMP_MIB_SENTINEL
162};
163
9b5b5cff 164static const struct snmp_mib snmp4_udp_list[] = {
1da177e4
LT		 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),
81aa646c
MB		 169 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
170 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 171 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
36cbb245 172 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
1da177e4
LT		 173 SNMP_MIB_SENTINEL
174};
175
9b5b5cff 176static const struct snmp_mib snmp4_net_list[] = {
1da177e4
LT		 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),
1da177e4
LT		 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),
31770e34 197 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
1da177e4 198 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
31770e34 199 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
1da177e4
LT		 200 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
201 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
202 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
1da177e4
LT		 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),
1da177e4
LT		 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),
1da177e4
LT		 215 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
216 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
6ba8a3b1 217 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
9b717a8d 218 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
1da177e4
LT		 219 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
220 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
1da177e4
LT		 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),
1da177e4
LT		 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),
06044751 233 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
18f02545
IJ		 234 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
235 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
236 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b 237 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3
DM		 238 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
239 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
72145a68 240 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
111cc8b9
IJ		 241 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
242 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
243 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8 244 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
8fe809a9 245 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
6cce09f8 246 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5 247 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755 248 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510 249 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc
ED		 250 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
251 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
09e9b813 252 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
c8628155 253 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
a6df1ae9
ED		 254 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
255 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
256 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
282f23c6 257 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
0c24604b 258 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
783237e8 259 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
f19c29e3 260 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
10467163
JC		 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),
46c2fa39 265 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
0e280af0 266 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
288a9376 267 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
f54b3111 268 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
8e165e20
FW		 269 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
270 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
271 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
f19c29e3
YC		 272 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
273 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
6e3a8a93
ED		 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),
032ee423
NC		 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),
e520af48
ED		 284 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
285 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
b56ea298
RJ		 286 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
287 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
feb5f2ec
YC		 288 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
289 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
200d95f4 290 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
fb223502 291 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
ea5d0c32 292 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
1da177e4
LT		 293 SNMP_MIB_SENTINEL
294};
295
b971e7ac
ED		 296static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
297 unsigned short *type, int count)
298{
299 int j;
300
301 if (count) {
c9f503b0 302 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 303 for (j = 0; j < count; ++j)
304 seq_printf(seq, " %sType%u",
305 type[j] & 0x100 ? "Out" : "In",
306 type[j] & 0xff);
c9f503b0 307 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 308 for (j = 0; j < count; ++j)
309 seq_printf(seq, " %lu", vals[j]);
310 }
311}
312
96793b48
DS		 313static void icmpmsg_put(struct seq_file *seq)
314{
315#define PERLINE 16
316
b971e7ac
ED		 317 int i, count;
318 unsigned short type[PERLINE];
319 unsigned long vals[PERLINE], val;
229bf0cb 320 struct net *net = seq->private;
96793b48
DS		 321
322 count = 0;
323 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3 324 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac
ED		 325 if (val) {
326 type[count] = i;
327 vals[count++] = val;
328 }
329 if (count == PERLINE) {
330 icmpmsg_put_line(seq, vals, type, count);
331 count = 0;
332 }
96793b48 333 }
b971e7ac 334 icmpmsg_put_line(seq, vals, type, count);
96793b48
DS		 335
336#undef PERLINE
337}
338
339static void icmp_put(struct seq_file *seq)
340{
341 int i;
229bf0cb 342 struct net *net = seq->private;
acb32ba3 343 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48 344
6a5dc9e5 345 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
6d4a741c 346 for (i = 0; icmpmibmap[i].name; i++)
96793b48 347 seq_printf(seq, " In%s", icmpmibmap[i].name);
c9f503b0 348 seq_puts(seq, " OutMsgs OutErrors");
6d4a741c 349 for (i = 0; icmpmibmap[i].name; i++)
96793b48 350 seq_printf(seq, " Out%s", icmpmibmap[i].name);
6a5dc9e5 351 seq_printf(seq, "\nIcmp: %lu %lu %lu",
698365fa
WC		 352 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
353 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
354 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
6d4a741c 355 for (i = 0; icmpmibmap[i].name; i++)
96793b48 356 seq_printf(seq, " %lu",
acb32ba3 357 atomic_long_read(ptr + icmpmibmap[i].index));
96793b48 358 seq_printf(seq, " %lu %lu",
698365fa
WC		 359 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
360 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
6d4a741c 361 for (i = 0; icmpmibmap[i].name; i++)
96793b48 362 seq_printf(seq, " %lu",
acb32ba3 363 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
96793b48
DS		 364}
365
1da177e4
LT		 366/*
367 * Called from the PROCfs module. This outputs /proc/net/snmp.
368 */
f22d5c49 369static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
1da177e4 370{
229bf0cb 371 struct net *net = seq->private;
f22d5c49
JH		 372 u64 buff64[IPSTATS_MIB_MAX];
373 int i;
1da177e4 374
f22d5c49 375 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
1da177e4 376
f22d5c49 377 seq_puts(seq, "Ip: Forwarding DefaultTTL");
6d4a741c 378 for (i = 0; snmp4_ipstats_list[i].name; i++)
1da177e4
LT		 379 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
380
381 seq_printf(seq, "\nIp: %d %d",
8e3461d0 382 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
fa50d974 383 net->ipv4.sysctl_ip_default_ttl);
1da177e4 384
4ce3c183 385 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
f22d5c49
JH		 386 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
387 net->mib.ip_statistics,
388 offsetof(struct ipstats_mib, syncp));
6d4a741c 389 for (i = 0; snmp4_ipstats_list[i].name; i++)
f22d5c49 390 seq_printf(seq, " %llu", buff64[i]);
1da177e4 391
f22d5c49
JH		 392 return 0;
393}
394
395static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
396{
397 unsigned long buff[TCPUDP_MIB_MAX];
398 struct net *net = seq->private;
399 int i;
400
401 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4
LT		 402
403 seq_puts(seq, "\nTcp:");
6d4a741c 404 for (i = 0; snmp4_tcp_list[i].name; i++)
1da177e4
LT		 405 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
406
407 seq_puts(seq, "\nTcp:");
f22d5c49
JH		 408 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
409 net->mib.tcp_statistics);
6d4a741c 410 for (i = 0; snmp4_tcp_list[i].name; i++) {
1da177e4
LT		 411 /* MaxConn field is signed, RFC 2012 */
412 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
f22d5c49 413 seq_printf(seq, " %ld", buff[i]);
1da177e4 414 else
f22d5c49 415 seq_printf(seq, " %lu", buff[i]);
1da177e4
LT		 416 }
417
f22d5c49
JH		 418 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
419
420 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
421 net->mib.udp_statistics);
1da177e4 422 seq_puts(seq, "\nUdp:");
6d4a741c 423 for (i = 0; snmp4_udp_list[i].name; i++)
1da177e4 424 seq_printf(seq, " %s", snmp4_udp_list[i].name);
1da177e4 425 seq_puts(seq, "\nUdp:");
6d4a741c 426 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49
JH		 427 seq_printf(seq, " %lu", buff[i]);
428
429 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4 430
ba4e58ec
GR		 431 /* the UDP and UDP-Lite MIBs are the same */
432 seq_puts(seq, "\nUdpLite:");
f22d5c49
JH		 433 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
434 net->mib.udplite_statistics);
6d4a741c 435 for (i = 0; snmp4_udp_list[i].name; i++)
ba4e58ec 436 seq_printf(seq, " %s", snmp4_udp_list[i].name);
ba4e58ec 437 seq_puts(seq, "\nUdpLite:");
6d4a741c 438 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49 439 seq_printf(seq, " %lu", buff[i]);
db8dac20 440
1da177e4
LT		 441 seq_putc(seq, '\n');
442 return 0;
443}
444
f22d5c49
JH		 445static int snmp_seq_show(struct seq_file *seq, void *v)
446{
447 snmp_seq_show_ipstats(seq, v);
448
449 icmp_put(seq); /* RFC 2011 compatibility */
450 icmpmsg_put(seq);
451
452 snmp_seq_show_tcp_udp(seq, v);
453
454 return 0;
455}
456
1da177e4
LT		 457/*
458 * Output /proc/net/netstat
459 */
460static int netstat_seq_show(struct seq_file *seq, void *v)
461{
462 int i;
7b7a9dfd 463 struct net *net = seq->private;
1da177e4
LT		 464
465 seq_puts(seq, "TcpExt:");
6d4a741c 466 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4
LT		 467 seq_printf(seq, " %s", snmp4_net_list[i].name);
468
469 seq_puts(seq, "\nTcpExt:");
6d4a741c 470 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4 471 seq_printf(seq, " %lu",
698365fa 472 snmp_fold_field(net->mib.net_statistics,
5e0f0435 473 snmp4_net_list[i].entry));
1da177e4 474
d831666e 475 seq_puts(seq, "\nIpExt:");
6d4a741c 476 for (i = 0; snmp4_ipextstats_list[i].name; i++)
d831666e
MC		 477 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
478
479 seq_puts(seq, "\nIpExt:");
6d4a741c 480 for (i = 0; snmp4_ipextstats_list[i].name; i++)
4ce3c183 481 seq_printf(seq, " %llu",
698365fa 482 snmp_fold_field64(net->mib.ip_statistics,
4ce3c183
ED		 483 snmp4_ipextstats_list[i].entry,
484 offsetof(struct ipstats_mib, syncp)));
d831666e 485
1da177e4
LT		 486 seq_putc(seq, '\n');
487 return 0;
488}
489
d0538ca3
PE		 490static __net_init int ip_proc_init_net(struct net *net)
491{
3617d949
CH		 492 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
493 sockstat_seq_show, NULL))
60bdde95 494 goto out_sockstat;
3617d949
CH		 495 if (!proc_create_net_single("netstat", 0444, net->proc_net,
496 netstat_seq_show, NULL))
7b7a9dfd 497 goto out_netstat;
3617d949
CH		 498 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
499 NULL))
229bf0cb 500 goto out_snmp;
7b7a9dfd 501
d0538ca3 502 return 0;
7b7a9dfd 503
229bf0cb 504out_snmp:
ece31ffd 505 remove_proc_entry("netstat", net->proc_net);
7b7a9dfd 506out_netstat:
ece31ffd 507 remove_proc_entry("sockstat", net->proc_net);
60bdde95 508out_sockstat:
7b7a9dfd 509 return -ENOMEM;
d0538ca3
PE		 510}
511
512static __net_exit void ip_proc_exit_net(struct net *net)
513{
ece31ffd
G		 514 remove_proc_entry("snmp", net->proc_net);
515 remove_proc_entry("netstat", net->proc_net);
516 remove_proc_entry("sockstat", net->proc_net);
d0538ca3
PE		 517}
518
519static __net_initdata struct pernet_operations ip_proc_ops = {
520 .init = ip_proc_init_net,
521 .exit = ip_proc_exit_net,
522};
523
1da177e4
LT		 524int __init ip_misc_proc_init(void)
525{
60bdde95 526 return register_pernet_subsys(&ip_proc_ops);
1da177e4 527}
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