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/udp.h>
37 #include <net/udplite.h>
38 #include <linux/bottom_half.h>
39 #include <linux/inetdevice.h>
40 #include <linux/proc_fs.h>
41 #include <linux/seq_file.h>
42 #include <linux/export.h>
43 #include <net/sock.h>
44 #include <net/raw.h>
45
46 #define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
47
48 /*
49 * Report socket allocation statistics [mea@utu.fi]
50 */
sockstat_seq_show(struct seq_file * seq,void * v)51 static int sockstat_seq_show(struct seq_file *seq, void *v)
52 {
53 struct net *net = seq->private;
54 int orphans, sockets;
55
56 orphans = tcp_orphan_count_sum();
57 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
58
59 socket_seq_show(seq);
60 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
61 sock_prot_inuse_get(net, &tcp_prot), orphans,
62 refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1,
63 sockets, proto_memory_allocated(&tcp_prot));
64 seq_printf(seq, "UDP: inuse %d mem %ld\n",
65 sock_prot_inuse_get(net, &udp_prot),
66 proto_memory_allocated(&udp_prot));
67 seq_printf(seq, "UDPLITE: inuse %d\n",
68 sock_prot_inuse_get(net, &udplite_prot));
69 seq_printf(seq, "RAW: inuse %d\n",
70 sock_prot_inuse_get(net, &raw_prot));
71 seq_printf(seq, "FRAG: inuse %u memory %lu\n",
72 atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
73 frag_mem_limit(net->ipv4.fqdir));
74 return 0;
75 }
76
77 /* snmp items */
78 static const struct snmp_mib snmp4_ipstats_list[] = {
79 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
80 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
81 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
82 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
83 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
84 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
85 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
86 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
87 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
88 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
89 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
90 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
91 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
92 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
93 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
94 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
95 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
96 SNMP_MIB_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS),
97 SNMP_MIB_SENTINEL
98 };
99
100 /* Following items are displayed in /proc/net/netstat */
101 static const struct snmp_mib snmp4_ipextstats_list[] = {
102 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
103 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
104 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
105 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
106 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
107 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
108 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
109 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
110 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
111 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
112 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
113 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
114 /* Non RFC4293 fields */
115 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
116 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
117 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
118 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
119 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
120 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
121 SNMP_MIB_SENTINEL
122 };
123
124 static const struct {
125 const char *name;
126 int index;
127 } icmpmibmap[] = {
128 { "DestUnreachs", ICMP_DEST_UNREACH },
129 { "TimeExcds", ICMP_TIME_EXCEEDED },
130 { "ParmProbs", ICMP_PARAMETERPROB },
131 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
132 { "Redirects", ICMP_REDIRECT },
133 { "Echos", ICMP_ECHO },
134 { "EchoReps", ICMP_ECHOREPLY },
135 { "Timestamps", ICMP_TIMESTAMP },
136 { "TimestampReps", ICMP_TIMESTAMPREPLY },
137 { "AddrMasks", ICMP_ADDRESS },
138 { "AddrMaskReps", ICMP_ADDRESSREPLY },
139 { NULL, 0 }
140 };
141
142
143 static const struct snmp_mib snmp4_tcp_list[] = {
144 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
145 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
146 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
147 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
148 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
149 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
150 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
151 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
152 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
153 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
154 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
155 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
156 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
157 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
158 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
159 SNMP_MIB_SENTINEL
160 };
161
162 static const struct snmp_mib snmp4_udp_list[] = {
163 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
164 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
165 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
166 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
167 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
168 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
169 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
170 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
171 SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
172 SNMP_MIB_SENTINEL
173 };
174
175 static const struct snmp_mib snmp4_net_list[] = {
176 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
177 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
178 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
179 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
180 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
181 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
182 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
183 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
184 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
185 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
186 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
187 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
188 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
189 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
190 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
191 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
192 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
193 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
194 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
195 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
196 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
197 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
198 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
199 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
200 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
201 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
202 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
203 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
204 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
205 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
206 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
207 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
208 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
209 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
210 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
211 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
212 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
213 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
214 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
215 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
216 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
217 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
218 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
219 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
220 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
221 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
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),
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),
233 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
234 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
235 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
236 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
237 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
238 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
239 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
240 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
241 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
242 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
243 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
244 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
245 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
246 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
247 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
248 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
249 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
250 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
251 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
252 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
253 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
254 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
255 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
256 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
257 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
258 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
259 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
260 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
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),
265 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
266 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
267 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
268 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
269 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
270 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
271 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
272 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
273 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
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),
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),
284 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
285 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
286 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
287 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
288 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
289 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
290 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
291 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
292 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
293 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
294 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
295 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
296 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
297 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
298 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
299 SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
300 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
301 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH),
302 SNMP_MIB_SENTINEL
303 };
304
icmpmsg_put_line(struct seq_file * seq,unsigned long * vals,unsigned short * type,int count)305 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
306 unsigned short *type, int count)
307 {
308 int j;
309
310 if (count) {
311 seq_puts(seq, "\nIcmpMsg:");
312 for (j = 0; j < count; ++j)
313 seq_printf(seq, " %sType%u",
314 type[j] & 0x100 ? "Out" : "In",
315 type[j] & 0xff);
316 seq_puts(seq, "\nIcmpMsg:");
317 for (j = 0; j < count; ++j)
318 seq_printf(seq, " %lu", vals[j]);
319 }
320 }
321
icmpmsg_put(struct seq_file * seq)322 static void icmpmsg_put(struct seq_file *seq)
323 {
324 #define PERLINE 16
325
326 int i, count;
327 unsigned short type[PERLINE];
328 unsigned long vals[PERLINE], val;
329 struct net *net = seq->private;
330
331 count = 0;
332 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
333 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
334 if (val) {
335 type[count] = i;
336 vals[count++] = val;
337 }
338 if (count == PERLINE) {
339 icmpmsg_put_line(seq, vals, type, count);
340 count = 0;
341 }
342 }
343 icmpmsg_put_line(seq, vals, type, count);
344
345 #undef PERLINE
346 }
347
icmp_put(struct seq_file * seq)348 static void icmp_put(struct seq_file *seq)
349 {
350 int i;
351 struct net *net = seq->private;
352 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
353
354 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
355 for (i = 0; icmpmibmap[i].name; i++)
356 seq_printf(seq, " In%s", icmpmibmap[i].name);
357 seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost");
358 for (i = 0; icmpmibmap[i].name; i++)
359 seq_printf(seq, " Out%s", icmpmibmap[i].name);
360 seq_printf(seq, "\nIcmp: %lu %lu %lu",
361 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
362 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
363 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
364 for (i = 0; icmpmibmap[i].name; i++)
365 seq_printf(seq, " %lu",
366 atomic_long_read(ptr + icmpmibmap[i].index));
367 seq_printf(seq, " %lu %lu %lu %lu",
368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
369 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS),
370 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL),
371 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST));
372 for (i = 0; icmpmibmap[i].name; i++)
373 seq_printf(seq, " %lu",
374 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
375 }
376
377 /*
378 * Called from the PROCfs module. This outputs /proc/net/snmp.
379 */
snmp_seq_show_ipstats(struct seq_file * seq,void * v)380 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
381 {
382 struct net *net = seq->private;
383 u64 buff64[IPSTATS_MIB_MAX];
384 int i;
385
386 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
387
388 seq_puts(seq, "Ip: Forwarding DefaultTTL");
389 for (i = 0; snmp4_ipstats_list[i].name; i++)
390 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
391
392 seq_printf(seq, "\nIp: %d %d",
393 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
394 READ_ONCE(net->ipv4.sysctl_ip_default_ttl));
395
396 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
397 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
398 net->mib.ip_statistics,
399 offsetof(struct ipstats_mib, syncp));
400 for (i = 0; snmp4_ipstats_list[i].name; i++)
401 seq_printf(seq, " %llu", buff64[i]);
402
403 return 0;
404 }
405
snmp_seq_show_tcp_udp(struct seq_file * seq,void * v)406 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
407 {
408 unsigned long buff[TCPUDP_MIB_MAX];
409 struct net *net = seq->private;
410 int i;
411
412 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
413
414 seq_puts(seq, "\nTcp:");
415 for (i = 0; snmp4_tcp_list[i].name; i++)
416 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
417
418 seq_puts(seq, "\nTcp:");
419 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
420 net->mib.tcp_statistics);
421 for (i = 0; snmp4_tcp_list[i].name; i++) {
422 /* MaxConn field is signed, RFC 2012 */
423 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
424 seq_printf(seq, " %ld", buff[i]);
425 else
426 seq_printf(seq, " %lu", buff[i]);
427 }
428
429 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
430
431 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
432 net->mib.udp_statistics);
433 seq_puts(seq, "\nUdp:");
434 for (i = 0; snmp4_udp_list[i].name; i++)
435 seq_printf(seq, " %s", snmp4_udp_list[i].name);
436 seq_puts(seq, "\nUdp:");
437 for (i = 0; snmp4_udp_list[i].name; i++)
438 seq_printf(seq, " %lu", buff[i]);
439
440 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
441
442 /* the UDP and UDP-Lite MIBs are the same */
443 seq_puts(seq, "\nUdpLite:");
444 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
445 net->mib.udplite_statistics);
446 for (i = 0; snmp4_udp_list[i].name; i++)
447 seq_printf(seq, " %s", snmp4_udp_list[i].name);
448 seq_puts(seq, "\nUdpLite:");
449 for (i = 0; snmp4_udp_list[i].name; i++)
450 seq_printf(seq, " %lu", buff[i]);
451
452 seq_putc(seq, '\n');
453 return 0;
454 }
455
snmp_seq_show(struct seq_file * seq,void * v)456 static int snmp_seq_show(struct seq_file *seq, void *v)
457 {
458 snmp_seq_show_ipstats(seq, v);
459
460 icmp_put(seq); /* RFC 2011 compatibility */
461 icmpmsg_put(seq);
462
463 snmp_seq_show_tcp_udp(seq, v);
464
465 return 0;
466 }
467
468 /*
469 * Output /proc/net/netstat
470 */
netstat_seq_show(struct seq_file * seq,void * v)471 static int netstat_seq_show(struct seq_file *seq, void *v)
472 {
473 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
474 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
475 struct net *net = seq->private;
476 unsigned long *buff;
477 int i;
478
479 seq_puts(seq, "TcpExt:");
480 for (i = 0; i < tcp_cnt; i++)
481 seq_printf(seq, " %s", snmp4_net_list[i].name);
482
483 seq_puts(seq, "\nTcpExt:");
484 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
485 GFP_KERNEL);
486 if (buff) {
487 snmp_get_cpu_field_batch(buff, snmp4_net_list,
488 net->mib.net_statistics);
489 for (i = 0; i < tcp_cnt; i++)
490 seq_printf(seq, " %lu", buff[i]);
491 } else {
492 for (i = 0; i < tcp_cnt; i++)
493 seq_printf(seq, " %lu",
494 snmp_fold_field(net->mib.net_statistics,
495 snmp4_net_list[i].entry));
496 }
497 seq_puts(seq, "\nIpExt:");
498 for (i = 0; i < ip_cnt; i++)
499 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
500
501 seq_puts(seq, "\nIpExt:");
502 if (buff) {
503 u64 *buff64 = (u64 *)buff;
504
505 memset(buff64, 0, ip_cnt * sizeof(u64));
506 snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
507 net->mib.ip_statistics,
508 offsetof(struct ipstats_mib, syncp));
509 for (i = 0; i < ip_cnt; i++)
510 seq_printf(seq, " %llu", buff64[i]);
511 } else {
512 for (i = 0; i < ip_cnt; i++)
513 seq_printf(seq, " %llu",
514 snmp_fold_field64(net->mib.ip_statistics,
515 snmp4_ipextstats_list[i].entry,
516 offsetof(struct ipstats_mib, syncp)));
517 }
518 kfree(buff);
519 seq_putc(seq, '\n');
520 mptcp_seq_show(seq);
521 return 0;
522 }
523
ip_proc_init_net(struct net * net)524 static __net_init int ip_proc_init_net(struct net *net)
525 {
526 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
527 sockstat_seq_show, NULL))
528 goto out_sockstat;
529 if (!proc_create_net_single("netstat", 0444, net->proc_net,
530 netstat_seq_show, NULL))
531 goto out_netstat;
532 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
533 NULL))
534 goto out_snmp;
535
536 return 0;
537
538 out_snmp:
539 remove_proc_entry("netstat", net->proc_net);
540 out_netstat:
541 remove_proc_entry("sockstat", net->proc_net);
542 out_sockstat:
543 return -ENOMEM;
544 }
545
ip_proc_exit_net(struct net * net)546 static __net_exit void ip_proc_exit_net(struct net *net)
547 {
548 remove_proc_entry("snmp", net->proc_net);
549 remove_proc_entry("netstat", net->proc_net);
550 remove_proc_entry("sockstat", net->proc_net);
551 }
552
553 static __net_initdata struct pernet_operations ip_proc_ops = {
554 .init = ip_proc_init_net,
555 .exit = ip_proc_exit_net,
556 };
557
ip_misc_proc_init(void)558 int __init ip_misc_proc_init(void)
559 {
560 return register_pernet_subsys(&ip_proc_ops);
561 }
562