1 // SPDX-License-Identifier: GPL-2.0-or-later
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 *
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
29 */
30 #include <linux/types.h>
31 #include <net/net_namespace.h>
32 #include <net/icmp.h>
33 #include <net/protocol.h>
34 #include <net/tcp.h>
35 #include <net/mptcp.h>
36 #include <net/proto_memory.h>
37 #include <net/udp.h>
38 #include <net/udplite.h>
39 #include <linux/bottom_half.h>
40 #include <linux/inetdevice.h>
41 #include <linux/proc_fs.h>
42 #include <linux/seq_file.h>
43 #include <linux/export.h>
44 #include <net/sock.h>
45 #include <net/raw.h>
46
47 #define TCPUDP_MIB_MAX MAX_T(u32, UDP_MIB_MAX, TCP_MIB_MAX)
48
49 /*
50 * Report socket allocation statistics [mea@utu.fi]
51 */
52 static int sockstat_seq_show(struct seq_file *seq, void *v)
53 {
54 struct net *net = seq->private;
55 int orphans, sockets;
56
57 orphans = tcp_orphan_count_sum();
58 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
59
60 socket_seq_show(seq);
61 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
62 sock_prot_inuse_get(net, &tcp_prot), orphans,
63 refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1,
64 sockets, proto_memory_allocated(&tcp_prot));
65 seq_printf(seq, "UDP: inuse %d mem %ld\n",
66 sock_prot_inuse_get(net, &udp_prot),
67 proto_memory_allocated(&udp_prot));
68 seq_printf(seq, "UDPLITE: inuse %d\n",
69 sock_prot_inuse_get(net, &udplite_prot));
70 seq_printf(seq, "RAW: inuse %d\n",
71 sock_prot_inuse_get(net, &raw_prot));
72 seq_printf(seq, "FRAG: inuse %u memory %lu\n",
73 atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
74 frag_mem_limit(net->ipv4.fqdir));
75 return 0;
76 }
77
78 /* snmp items */
79 static const struct snmp_mib snmp4_ipstats_list[] = {
80 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
81 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
82 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
83 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
84 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
85 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
86 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
87 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
88 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
89 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
90 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
91 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
92 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
93 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
94 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
95 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
96 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
97 SNMP_MIB_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS),
98 SNMP_MIB_SENTINEL
99 };
100
101 /* Following items are displayed in /proc/net/netstat */
102 static const struct snmp_mib snmp4_ipextstats_list[] = {
103 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
104 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
105 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
106 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
107 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
108 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
109 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
110 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
111 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
112 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
113 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
114 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
115 /* Non RFC4293 fields */
116 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
117 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
118 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
119 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
120 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
121 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
122 SNMP_MIB_SENTINEL
123 };
124
125 static const struct {
126 const char *name;
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 },
140 { NULL, 0 }
141 };
142
143
144 static const struct snmp_mib snmp4_tcp_list[] = {
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),
159 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
160 SNMP_MIB_SENTINEL
161 };
162
163 static const struct snmp_mib snmp4_udp_list[] = {
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),
168 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
169 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
170 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
171 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
172 SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
173 SNMP_MIB_SENTINEL
174 };
175
176 static const struct snmp_mib snmp4_net_list[] = {
177 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
178 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
179 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
180 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
181 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
182 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
183 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
184 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
185 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
186 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
187 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
188 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
189 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
190 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
191 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
192 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
193 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
194 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
195 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
196 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
197 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
198 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
199 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
200 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
201 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
202 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
203 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
204 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
205 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
206 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
207 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
208 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
209 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
210 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
211 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
212 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
213 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
214 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
215 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
216 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
217 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
218 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
219 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
220 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
221 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
222 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
223 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
224 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
225 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
226 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
227 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
228 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
229 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
230 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
231 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
232 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
233 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
234 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
235 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
236 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
237 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
238 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
239 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
240 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
241 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
242 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
243 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
244 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
245 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
246 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
247 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
248 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
249 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
250 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
251 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
252 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
253 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
254 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
255 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
256 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
257 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
258 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
259 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
260 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
261 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
262 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
263 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
264 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
265 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
266 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
267 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
268 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
269 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
270 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
271 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
272 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
273 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
274 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
275 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
276 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
277 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
278 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
279 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
280 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
281 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
282 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
283 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
284 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
285 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
286 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
287 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
288 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
289 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
290 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
291 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
292 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
293 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
294 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
295 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
296 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
297 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
298 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
299 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
300 SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
301 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
302 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH),
303 SNMP_MIB_ITEM("TCPAORequired", LINUX_MIB_TCPAOREQUIRED),
304 SNMP_MIB_ITEM("TCPAOBad", LINUX_MIB_TCPAOBAD),
305 SNMP_MIB_ITEM("TCPAOKeyNotFound", LINUX_MIB_TCPAOKEYNOTFOUND),
306 SNMP_MIB_ITEM("TCPAOGood", LINUX_MIB_TCPAOGOOD),
307 SNMP_MIB_ITEM("TCPAODroppedIcmps", LINUX_MIB_TCPAODROPPEDICMPS),
308 SNMP_MIB_SENTINEL
309 };
310
311 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
312 unsigned short *type, int count)
313 {
314 int j;
315
316 if (count) {
317 seq_puts(seq, "\nIcmpMsg:");
318 for (j = 0; j < count; ++j)
319 seq_printf(seq, " %sType%u",
320 type[j] & 0x100 ? "Out" : "In",
321 type[j] & 0xff);
322 seq_puts(seq, "\nIcmpMsg:");
323 for (j = 0; j < count; ++j)
324 seq_printf(seq, " %lu", vals[j]);
325 }
326 }
327
328 static void icmpmsg_put(struct seq_file *seq)
329 {
330 #define PERLINE 16
331
332 int i, count;
333 unsigned short type[PERLINE];
334 unsigned long vals[PERLINE], val;
335 struct net *net = seq->private;
336
337 count = 0;
338 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
339 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
340 if (val) {
341 type[count] = i;
342 vals[count++] = val;
343 }
344 if (count == PERLINE) {
345 icmpmsg_put_line(seq, vals, type, count);
346 count = 0;
347 }
348 }
349 icmpmsg_put_line(seq, vals, type, count);
350
351 #undef PERLINE
352 }
353
354 static void icmp_put(struct seq_file *seq)
355 {
356 int i;
357 struct net *net = seq->private;
358 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
359
360 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
361 for (i = 0; icmpmibmap[i].name; i++)
362 seq_printf(seq, " In%s", icmpmibmap[i].name);
363 seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost");
364 for (i = 0; icmpmibmap[i].name; i++)
365 seq_printf(seq, " Out%s", icmpmibmap[i].name);
366 seq_printf(seq, "\nIcmp: %lu %lu %lu",
367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
369 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
370 for (i = 0; icmpmibmap[i].name; i++)
371 seq_printf(seq, " %lu",
372 atomic_long_read(ptr + icmpmibmap[i].index));
373 seq_printf(seq, " %lu %lu %lu %lu",
374 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
375 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS),
376 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL),
377 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST));
378 for (i = 0; icmpmibmap[i].name; i++)
379 seq_printf(seq, " %lu",
380 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
381 }
382
383 /*
384 * Called from the PROCfs module. This outputs /proc/net/snmp.
385 */
386 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
387 {
388 struct net *net = seq->private;
389 u64 buff64[IPSTATS_MIB_MAX];
390 int i;
391
392 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
393
394 seq_puts(seq, "Ip: Forwarding DefaultTTL");
395 for (i = 0; snmp4_ipstats_list[i].name; i++)
396 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
397
398 seq_printf(seq, "\nIp: %d %d",
399 IPV4_DEVCONF_ALL_RO(net, FORWARDING) ? 1 : 2,
400 READ_ONCE(net->ipv4.sysctl_ip_default_ttl));
401
402 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
403 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
404 net->mib.ip_statistics,
405 offsetof(struct ipstats_mib, syncp));
406 for (i = 0; snmp4_ipstats_list[i].name; i++)
407 seq_printf(seq, " %llu", buff64[i]);
408
409 return 0;
410 }
411
412 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
413 {
414 unsigned long buff[TCPUDP_MIB_MAX];
415 struct net *net = seq->private;
416 int i;
417
418 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
419
420 seq_puts(seq, "\nTcp:");
421 for (i = 0; snmp4_tcp_list[i].name; i++)
422 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
423
424 seq_puts(seq, "\nTcp:");
425 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
426 net->mib.tcp_statistics);
427 for (i = 0; snmp4_tcp_list[i].name; i++) {
428 /* MaxConn field is signed, RFC 2012 */
429 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
430 seq_printf(seq, " %ld", buff[i]);
431 else
432 seq_printf(seq, " %lu", buff[i]);
433 }
434
435 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
436
437 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
438 net->mib.udp_statistics);
439 seq_puts(seq, "\nUdp:");
440 for (i = 0; snmp4_udp_list[i].name; i++)
441 seq_printf(seq, " %s", snmp4_udp_list[i].name);
442 seq_puts(seq, "\nUdp:");
443 for (i = 0; snmp4_udp_list[i].name; i++)
444 seq_printf(seq, " %lu", buff[i]);
445
446 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
447
448 /* the UDP and UDP-Lite MIBs are the same */
449 seq_puts(seq, "\nUdpLite:");
450 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
451 net->mib.udplite_statistics);
452 for (i = 0; snmp4_udp_list[i].name; i++)
453 seq_printf(seq, " %s", snmp4_udp_list[i].name);
454 seq_puts(seq, "\nUdpLite:");
455 for (i = 0; snmp4_udp_list[i].name; i++)
456 seq_printf(seq, " %lu", buff[i]);
457
458 seq_putc(seq, '\n');
459 return 0;
460 }
461
462 static int snmp_seq_show(struct seq_file *seq, void *v)
463 {
464 snmp_seq_show_ipstats(seq, v);
465
466 icmp_put(seq); /* RFC 2011 compatibility */
467 icmpmsg_put(seq);
468
469 snmp_seq_show_tcp_udp(seq, v);
470
471 return 0;
472 }
473
474 /*
475 * Output /proc/net/netstat
476 */
477 static int netstat_seq_show(struct seq_file *seq, void *v)
478 {
479 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
480 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
481 struct net *net = seq->private;
482 unsigned long *buff;
483 int i;
484
485 seq_puts(seq, "TcpExt:");
486 for (i = 0; i < tcp_cnt; i++)
487 seq_printf(seq, " %s", snmp4_net_list[i].name);
488
489 seq_puts(seq, "\nTcpExt:");
490 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
491 GFP_KERNEL);
492 if (buff) {
493 snmp_get_cpu_field_batch(buff, snmp4_net_list,
494 net->mib.net_statistics);
495 for (i = 0; i < tcp_cnt; i++)
496 seq_printf(seq, " %lu", buff[i]);
497 } else {
498 for (i = 0; i < tcp_cnt; i++)
499 seq_printf(seq, " %lu",
500 snmp_fold_field(net->mib.net_statistics,
501 snmp4_net_list[i].entry));
502 }
503 seq_puts(seq, "\nIpExt:");
504 for (i = 0; i < ip_cnt; i++)
505 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
506
507 seq_puts(seq, "\nIpExt:");
508 if (buff) {
509 u64 *buff64 = (u64 *)buff;
510
511 memset(buff64, 0, ip_cnt * sizeof(u64));
512 snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
513 net->mib.ip_statistics,
514 offsetof(struct ipstats_mib, syncp));
515 for (i = 0; i < ip_cnt; i++)
516 seq_printf(seq, " %llu", buff64[i]);
517 } else {
518 for (i = 0; i < ip_cnt; i++)
519 seq_printf(seq, " %llu",
520 snmp_fold_field64(net->mib.ip_statistics,
521 snmp4_ipextstats_list[i].entry,
522 offsetof(struct ipstats_mib, syncp)));
523 }
524 kfree(buff);
525 seq_putc(seq, '\n');
526 mptcp_seq_show(seq);
527 return 0;
528 }
529
530 static __net_init int ip_proc_init_net(struct net *net)
531 {
532 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
533 sockstat_seq_show, NULL))
534 goto out_sockstat;
535 if (!proc_create_net_single("netstat", 0444, net->proc_net,
536 netstat_seq_show, NULL))
537 goto out_netstat;
538 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
539 NULL))
540 goto out_snmp;
541
542 return 0;
543
544 out_snmp:
545 remove_proc_entry("netstat", net->proc_net);
546 out_netstat:
547 remove_proc_entry("sockstat", net->proc_net);
548 out_sockstat:
549 return -ENOMEM;
550 }
551
552 static __net_exit void ip_proc_exit_net(struct net *net)
553 {
554 remove_proc_entry("snmp", net->proc_net);
555 remove_proc_entry("netstat", net->proc_net);
556 remove_proc_entry("sockstat", net->proc_net);
557 }
558
559 static __net_initdata struct pernet_operations ip_proc_ops = {
560 .init = ip_proc_init_net,
561 .exit = ip_proc_exit_net,
562 };
563
564 int __init ip_misc_proc_init(void)
565 {
566 return register_pernet_subsys(&ip_proc_ops);
567 }
568
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