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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020035#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <net/icmp.h>
37#include <net/protocol.h>
38#include <net/tcp.h>
39#include <net/udp.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080040#include <net/udplite.h>
Herbert Xueb4dea52008-12-29 23:04:08 -080041#include <linux/bottom_half.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020042#include <linux/inetdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/proc_fs.h>
44#include <linux/seq_file.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040045#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <net/sock.h>
47#include <net/raw.h>
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049/*
50 * Report socket allocation statistics [mea@utu.fi]
51 */
52static int sockstat_seq_show(struct seq_file *seq, void *v)
53{
Pavel Emelyanovfd4e7b52008-03-31 19:43:18 -070054 struct net *net = seq->private;
Florian Westphal434d3052014-07-24 16:50:33 +020055 unsigned int frag_mem;
Herbert Xueb4dea52008-12-29 23:04:08 -080056 int orphans, sockets;
57
58 local_bh_disable();
Thomas Gleixner1c10c492009-02-16 00:08:56 -080059 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
Glauber Costa180d8cd2011-12-11 21:47:02 +000060 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
Herbert Xueb4dea52008-12-29 23:04:08 -080061 local_bh_enable();
Pavel Emelyanovfd4e7b52008-03-31 19:43:18 -070062
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 socket_seq_show(seq);
Eric Dumazet8d987e52010-11-09 23:24:26 +000064 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
Herbert Xueb4dea52008-12-29 23:04:08 -080065 sock_prot_inuse_get(net, &tcp_prot), orphans,
Eric Dumazet789f5582015-04-12 18:51:09 -070066 atomic_read(&tcp_death_row.tw_count), sockets,
Glauber Costa180d8cd2011-12-11 21:47:02 +000067 proto_memory_allocated(&tcp_prot));
Eric Dumazet8d987e52010-11-09 23:24:26 +000068 seq_printf(seq, "UDP: inuse %d mem %ld\n",
Pavel Emelyanovfd4e7b52008-03-31 19:43:18 -070069 sock_prot_inuse_get(net, &udp_prot),
Glauber Costa180d8cd2011-12-11 21:47:02 +000070 proto_memory_allocated(&udp_prot));
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -070071 seq_printf(seq, "UDPLITE: inuse %d\n",
Pavel Emelyanovfd4e7b52008-03-31 19:43:18 -070072 sock_prot_inuse_get(net, &udplite_prot));
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -070073 seq_printf(seq, "RAW: inuse %d\n",
Pavel Emelyanovfd4e7b52008-03-31 19:43:18 -070074 sock_prot_inuse_get(net, &raw_prot));
Florian Westphal434d3052014-07-24 16:50:33 +020075 frag_mem = ip_frag_mem(net);
76 seq_printf(seq, "FRAG: inuse %u memory %u\n", !!frag_mem, frag_mem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 return 0;
78}
79
80static int sockstat_seq_open(struct inode *inode, struct file *file)
81{
Pavel Emelyanovde05c552008-07-18 04:07:21 -070082 return single_open_net(inode, file, sockstat_seq_show);
Pavel Emelyanovfd4e7b52008-03-31 19:43:18 -070083}
84
Arjan van de Ven9a321442007-02-12 00:55:35 -080085static const struct file_operations sockstat_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 .owner = THIS_MODULE,
87 .open = sockstat_seq_open,
88 .read = seq_read,
89 .llseek = seq_lseek,
Pavel Emelyanovb6fcbdb2008-07-18 04:07:44 -070090 .release = single_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -070091};
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093/* snmp items */
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -080094static const struct snmp_mib snmp4_ipstats_list[] = {
Neil Hormanedf391f2009-04-27 02:45:02 -070095 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
97 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
98 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
99 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
100 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
101 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
Neil Hormanedf391f2009-04-27 02:45:02 -0700102 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
104 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
105 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
106 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
107 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
108 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
109 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
110 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
111 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
112 SNMP_MIB_SENTINEL
113};
114
Eric Dumazet1f07d032013-08-06 03:32:11 -0700115/* Following items are displayed in /proc/net/netstat */
Mitsuru Chinend8316662007-05-14 03:07:30 -0700116static const struct snmp_mib snmp4_ipextstats_list[] = {
117 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
118 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
119 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
120 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
121 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
122 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
Neil Hormanedf391f2009-04-27 02:45:02 -0700123 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
124 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
125 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
126 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
127 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
128 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
Eric Dumazet1f07d032013-08-06 03:32:11 -0700129 /* Non RFC4293 fields */
Eric Dumazet6a5dc9e2013-04-29 08:39:56 +0000130 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
Eric Dumazet1f07d032013-08-06 03:32:11 -0700131 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
132 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
133 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
134 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
Mitsuru Chinend8316662007-05-14 03:07:30 -0700135 SNMP_MIB_SENTINEL
136};
137
Alexey Dobriyan58339292010-01-22 10:17:26 +0000138static const struct {
139 const char *name;
David L Stevens96793b42007-09-17 09:57:33 -0700140 int index;
141} icmpmibmap[] = {
142 { "DestUnreachs", ICMP_DEST_UNREACH },
143 { "TimeExcds", ICMP_TIME_EXCEEDED },
144 { "ParmProbs", ICMP_PARAMETERPROB },
145 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
146 { "Redirects", ICMP_REDIRECT },
147 { "Echos", ICMP_ECHO },
148 { "EchoReps", ICMP_ECHOREPLY },
149 { "Timestamps", ICMP_TIMESTAMP },
150 { "TimestampReps", ICMP_TIMESTAMPREPLY },
151 { "AddrMasks", ICMP_ADDRESS },
152 { "AddrMaskReps", ICMP_ADDRESSREPLY },
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -0700153 { NULL, 0 }
David L Stevens96793b42007-09-17 09:57:33 -0700154};
155
156
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800157static const struct snmp_mib snmp4_tcp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
159 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
160 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
161 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
162 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
163 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
164 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
165 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
166 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
167 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
168 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
169 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
170 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
171 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
Eric Dumazet6a5dc9e2013-04-29 08:39:56 +0000172 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 SNMP_MIB_SENTINEL
174};
175
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800176static const struct snmp_mib snmp4_udp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
178 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
179 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
180 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
Martin Bligh81aa6462006-08-14 23:57:10 -0700181 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
182 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
Eric Dumazet6a5dc9e2013-04-29 08:39:56 +0000183 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
Rick Jones36cbb242014-11-06 10:37:54 -0800184 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 SNMP_MIB_SENTINEL
186};
187
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800188static const struct snmp_mib snmp4_net_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
190 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
191 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
192 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
193 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
194 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
195 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
196 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
197 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
198 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
199 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
200 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
201 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
202 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
203 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
204 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
205 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
206 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
207 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
208 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
209 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
210 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
211 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
212 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
213 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
214 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
215 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
216 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
217 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
218 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
219 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
220 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
221 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
222 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
223 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
224 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
225 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
226 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
227 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
228 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
230 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
231 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
232 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
233 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
234 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
235 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
236 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +0000237 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
Nandita Dukkipati9b717a82013-03-11 10:00:44 +0000238 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
240 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
241 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
242 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
243 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
244 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
245 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
246 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
248 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
249 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
250 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
251 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
252 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
253 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
Ilpo Järvinen18f02542007-08-24 22:55:52 -0700254 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
255 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
256 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
Ilpo Järvinen912d8f02007-09-25 22:47:31 -0700257 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
David S. Miller785957d2008-07-30 03:03:15 -0700258 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
259 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
Ilpo Järvinen111cc8b2008-11-24 21:27:22 -0800260 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
261 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
262 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
Eric Dumazet6cce09f2010-03-07 23:21:57 +0000263 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
264 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
Eric Dumazet907cdda2010-03-19 05:37:18 +0000265 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
Eric Dumazetb5f7e752010-06-02 12:05:27 +0000266 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
Tom Herbert67631512010-12-08 12:16:33 -0800267 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
Eric Dumazet946cedc2011-08-30 03:21:44 +0000268 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
269 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
Eric Dumazet09e9b812012-01-25 04:44:20 +0000270 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
Eric Dumazetc8628152012-03-18 11:07:47 +0000271 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
Eric Dumazeta6df1ae2012-07-16 01:41:36 +0000272 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
273 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
274 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
Eric Dumazet282f23c2012-07-17 10:13:05 +0200275 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
Eric Dumazet0c246042012-07-17 01:41:30 +0000276 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
Yuchung Cheng783237e2012-07-19 06:43:07 +0000277 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
Yuchung Chengf19c29e2014-03-03 12:31:36 -0800278 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
Jerry Chu10467162012-08-31 12:29:11 +0000279 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
280 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
281 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
282 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
Eric Dumazet0e280af2013-04-18 06:52:51 +0000283 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
Eliezer Tamir288a93762013-08-07 11:33:25 +0300284 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
Eric Dumazetf54b3112013-12-05 22:36:05 -0800285 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
Florian Westphal8e165e22014-02-25 14:34:32 +0100286 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
287 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
288 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
Yuchung Chengf19c29e2014-03-03 12:31:36 -0800289 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
290 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
Eric Dumazet6e3a8a92014-12-04 16:13:23 -0800291 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
292 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
293 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
294 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
Neal Cardwell032ee422015-02-06 16:04:38 -0500295 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
296 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
297 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
298 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
299 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
300 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
Eric Dumazete520af42015-05-06 14:26:25 -0700301 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
302 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
Rick Jonesb56ea292015-07-21 16:14:13 -0700303 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
304 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 SNMP_MIB_SENTINEL
306};
307
Eric Dumazetb971e7a2008-11-10 21:43:08 -0800308static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
309 unsigned short *type, int count)
310{
311 int j;
312
313 if (count) {
Fabian Frederickc9f503b2014-11-04 20:31:26 +0100314 seq_puts(seq, "\nIcmpMsg:");
Eric Dumazetb971e7a2008-11-10 21:43:08 -0800315 for (j = 0; j < count; ++j)
316 seq_printf(seq, " %sType%u",
317 type[j] & 0x100 ? "Out" : "In",
318 type[j] & 0xff);
Fabian Frederickc9f503b2014-11-04 20:31:26 +0100319 seq_puts(seq, "\nIcmpMsg:");
Eric Dumazetb971e7a2008-11-10 21:43:08 -0800320 for (j = 0; j < count; ++j)
321 seq_printf(seq, " %lu", vals[j]);
322 }
323}
324
David L Stevens96793b42007-09-17 09:57:33 -0700325static void icmpmsg_put(struct seq_file *seq)
326{
327#define PERLINE 16
328
Eric Dumazetb971e7a2008-11-10 21:43:08 -0800329 int i, count;
330 unsigned short type[PERLINE];
331 unsigned long vals[PERLINE], val;
Pavel Emelyanov229bf0c2008-07-18 04:06:04 -0700332 struct net *net = seq->private;
David L Stevens96793b42007-09-17 09:57:33 -0700333
334 count = 0;
335 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
Eric Dumazetacb32ba2011-11-08 13:04:43 +0000336 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
Eric Dumazetb971e7a2008-11-10 21:43:08 -0800337 if (val) {
338 type[count] = i;
339 vals[count++] = val;
340 }
341 if (count == PERLINE) {
342 icmpmsg_put_line(seq, vals, type, count);
343 count = 0;
344 }
David L Stevens96793b42007-09-17 09:57:33 -0700345 }
Eric Dumazetb971e7a2008-11-10 21:43:08 -0800346 icmpmsg_put_line(seq, vals, type, count);
David L Stevens96793b42007-09-17 09:57:33 -0700347
348#undef PERLINE
349}
350
351static void icmp_put(struct seq_file *seq)
352{
353 int i;
Pavel Emelyanov229bf0c2008-07-18 04:06:04 -0700354 struct net *net = seq->private;
Eric Dumazetacb32ba2011-11-08 13:04:43 +0000355 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
David L Stevens96793b42007-09-17 09:57:33 -0700356
Eric Dumazet6a5dc9e2013-04-29 08:39:56 +0000357 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
Weilong Chen442c67f2013-12-31 15:11:27 +0800358 for (i = 0; icmpmibmap[i].name != NULL; i++)
David L Stevens96793b42007-09-17 09:57:33 -0700359 seq_printf(seq, " In%s", icmpmibmap[i].name);
Fabian Frederickc9f503b2014-11-04 20:31:26 +0100360 seq_puts(seq, " OutMsgs OutErrors");
Weilong Chen442c67f2013-12-31 15:11:27 +0800361 for (i = 0; icmpmibmap[i].name != NULL; i++)
David L Stevens96793b42007-09-17 09:57:33 -0700362 seq_printf(seq, " Out%s", icmpmibmap[i].name);
Eric Dumazet6a5dc9e2013-04-29 08:39:56 +0000363 seq_printf(seq, "\nIcmp: %lu %lu %lu",
WANG Cong698365f2014-05-05 15:55:55 -0700364 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
Weilong Chen442c67f2013-12-31 15:11:27 +0800367 for (i = 0; icmpmibmap[i].name != NULL; i++)
David L Stevens96793b42007-09-17 09:57:33 -0700368 seq_printf(seq, " %lu",
Eric Dumazetacb32ba2011-11-08 13:04:43 +0000369 atomic_long_read(ptr + icmpmibmap[i].index));
David L Stevens96793b42007-09-17 09:57:33 -0700370 seq_printf(seq, " %lu %lu",
WANG Cong698365f2014-05-05 15:55:55 -0700371 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
372 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
Weilong Chen442c67f2013-12-31 15:11:27 +0800373 for (i = 0; icmpmibmap[i].name != NULL; i++)
David L Stevens96793b42007-09-17 09:57:33 -0700374 seq_printf(seq, " %lu",
Eric Dumazetacb32ba2011-11-08 13:04:43 +0000375 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
David L Stevens96793b42007-09-17 09:57:33 -0700376}
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378/*
379 * Called from the PROCfs module. This outputs /proc/net/snmp.
380 */
381static int snmp_seq_show(struct seq_file *seq, void *v)
382{
383 int i;
Pavel Emelyanov229bf0c2008-07-18 04:06:04 -0700384 struct net *net = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 seq_puts(seq, "Ip: Forwarding DefaultTTL");
387
388 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
389 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
390
391 seq_printf(seq, "\nIp: %d %d",
Pavel Emelyanov8e3461d2008-07-18 04:06:26 -0700392 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
Nikolay Borisovfa50d972016-02-15 12:11:27 +0200393 net->ipv4.sysctl_ip_default_ttl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700395 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700397 seq_printf(seq, " %llu",
WANG Cong698365f2014-05-05 15:55:55 -0700398 snmp_fold_field64(net->mib.ip_statistics,
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700399 snmp4_ipstats_list[i].entry,
400 offsetof(struct ipstats_mib, syncp)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
David L Stevens96793b42007-09-17 09:57:33 -0700402 icmp_put(seq); /* RFC 2011 compatibility */
403 icmpmsg_put(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
405 seq_puts(seq, "\nTcp:");
406 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
407 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
408
409 seq_puts(seq, "\nTcp:");
410 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
411 /* MaxConn field is signed, RFC 2012 */
412 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
413 seq_printf(seq, " %ld",
WANG Cong698365f2014-05-05 15:55:55 -0700414 snmp_fold_field(net->mib.tcp_statistics,
Herbert Xu5e0f0432007-04-24 21:53:35 -0700415 snmp4_tcp_list[i].entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 else
417 seq_printf(seq, " %lu",
WANG Cong698365f2014-05-05 15:55:55 -0700418 snmp_fold_field(net->mib.tcp_statistics,
Herbert Xu5e0f0432007-04-24 21:53:35 -0700419 snmp4_tcp_list[i].entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 }
421
422 seq_puts(seq, "\nUdp:");
423 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
424 seq_printf(seq, " %s", snmp4_udp_list[i].name);
425
426 seq_puts(seq, "\nUdp:");
427 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
428 seq_printf(seq, " %lu",
WANG Cong698365f2014-05-05 15:55:55 -0700429 snmp_fold_field(net->mib.udp_statistics,
Herbert Xu5e0f0432007-04-24 21:53:35 -0700430 snmp4_udp_list[i].entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800432 /* the UDP and UDP-Lite MIBs are the same */
433 seq_puts(seq, "\nUdpLite:");
434 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
435 seq_printf(seq, " %s", snmp4_udp_list[i].name);
436
437 seq_puts(seq, "\nUdpLite:");
438 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
439 seq_printf(seq, " %lu",
WANG Cong698365f2014-05-05 15:55:55 -0700440 snmp_fold_field(net->mib.udplite_statistics,
Herbert Xu5e0f0432007-04-24 21:53:35 -0700441 snmp4_udp_list[i].entry));
David S. Millerdb8dac22008-03-06 16:22:02 -0800442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 seq_putc(seq, '\n');
444 return 0;
445}
446
447static int snmp_seq_open(struct inode *inode, struct file *file)
448{
Pavel Emelyanovde05c552008-07-18 04:07:21 -0700449 return single_open_net(inode, file, snmp_seq_show);
Pavel Emelyanov229bf0c2008-07-18 04:06:04 -0700450}
451
Arjan van de Ven9a321442007-02-12 00:55:35 -0800452static const struct file_operations snmp_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 .owner = THIS_MODULE,
454 .open = snmp_seq_open,
455 .read = seq_read,
456 .llseek = seq_lseek,
Pavel Emelyanovb6fcbdb2008-07-18 04:07:44 -0700457 .release = single_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458};
459
David L Stevens96793b42007-09-17 09:57:33 -0700460
461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462/*
463 * Output /proc/net/netstat
464 */
465static int netstat_seq_show(struct seq_file *seq, void *v)
466{
467 int i;
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700468 struct net *net = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
470 seq_puts(seq, "TcpExt:");
471 for (i = 0; snmp4_net_list[i].name != NULL; i++)
472 seq_printf(seq, " %s", snmp4_net_list[i].name);
473
474 seq_puts(seq, "\nTcpExt:");
475 for (i = 0; snmp4_net_list[i].name != NULL; i++)
476 seq_printf(seq, " %lu",
WANG Cong698365f2014-05-05 15:55:55 -0700477 snmp_fold_field(net->mib.net_statistics,
Herbert Xu5e0f0432007-04-24 21:53:35 -0700478 snmp4_net_list[i].entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Mitsuru Chinend8316662007-05-14 03:07:30 -0700480 seq_puts(seq, "\nIpExt:");
481 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
482 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
483
484 seq_puts(seq, "\nIpExt:");
485 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700486 seq_printf(seq, " %llu",
WANG Cong698365f2014-05-05 15:55:55 -0700487 snmp_fold_field64(net->mib.ip_statistics,
Eric Dumazet4ce3c182010-06-30 13:31:19 -0700488 snmp4_ipextstats_list[i].entry,
489 offsetof(struct ipstats_mib, syncp)));
Mitsuru Chinend8316662007-05-14 03:07:30 -0700490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 seq_putc(seq, '\n');
492 return 0;
493}
494
495static int netstat_seq_open(struct inode *inode, struct file *file)
496{
Pavel Emelyanovde05c552008-07-18 04:07:21 -0700497 return single_open_net(inode, file, netstat_seq_show);
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700498}
499
Arjan van de Ven9a321442007-02-12 00:55:35 -0800500static const struct file_operations netstat_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 .owner = THIS_MODULE,
502 .open = netstat_seq_open,
503 .read = seq_read,
504 .llseek = seq_lseek,
Pavel Emelyanovb6fcbdb2008-07-18 04:07:44 -0700505 .release = single_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506};
507
Pavel Emelyanovd0538ca2008-03-31 19:42:37 -0700508static __net_init int ip_proc_init_net(struct net *net)
509{
Gao fengd4beaa62013-02-18 01:34:54 +0000510 if (!proc_create("sockstat", S_IRUGO, net->proc_net,
511 &sockstat_seq_fops))
Pavel Emelyanov60bdde92008-07-18 04:06:50 -0700512 goto out_sockstat;
Gao fengd4beaa62013-02-18 01:34:54 +0000513 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700514 goto out_netstat;
Gao fengd4beaa62013-02-18 01:34:54 +0000515 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
Pavel Emelyanov229bf0c2008-07-18 04:06:04 -0700516 goto out_snmp;
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700517
Pavel Emelyanovd0538ca2008-03-31 19:42:37 -0700518 return 0;
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700519
Pavel Emelyanov229bf0c2008-07-18 04:06:04 -0700520out_snmp:
Gao fengece31ff2013-02-18 01:34:56 +0000521 remove_proc_entry("netstat", net->proc_net);
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700522out_netstat:
Gao fengece31ff2013-02-18 01:34:56 +0000523 remove_proc_entry("sockstat", net->proc_net);
Pavel Emelyanov60bdde92008-07-18 04:06:50 -0700524out_sockstat:
Pavel Emelyanov7b7a9df2008-07-18 04:05:17 -0700525 return -ENOMEM;
Pavel Emelyanovd0538ca2008-03-31 19:42:37 -0700526}
527
528static __net_exit void ip_proc_exit_net(struct net *net)
529{
Gao fengece31ff2013-02-18 01:34:56 +0000530 remove_proc_entry("snmp", net->proc_net);
531 remove_proc_entry("netstat", net->proc_net);
532 remove_proc_entry("sockstat", net->proc_net);
Pavel Emelyanovd0538ca2008-03-31 19:42:37 -0700533}
534
535static __net_initdata struct pernet_operations ip_proc_ops = {
536 .init = ip_proc_init_net,
537 .exit = ip_proc_exit_net,
538};
539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540int __init ip_misc_proc_init(void)
541{
Pavel Emelyanov60bdde92008-07-18 04:06:50 -0700542 return register_pernet_subsys(&ip_proc_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543}
YOSHIFUJI Hideaki33490172007-04-20 15:57:15 -0700544