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 = percpu_counter_sum_positive(&tcp_orphan_count);
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 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
63 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_OUTPKTS),
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_SENTINEL
97 };
98
99 /* Following items are displayed in /proc/net/netstat */
100 static const struct snmp_mib snmp4_ipextstats_list[] = {
101 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
102 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
103 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
104 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
105 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
106 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
107 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
108 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
109 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
110 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
111 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
112 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
113 /* Non RFC4293 fields */
114 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
115 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
116 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
117 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
118 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
119 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
120 SNMP_MIB_SENTINEL
121 };
122
123 static const struct {
124 const char *name;
125 int index;
126 } icmpmibmap[] = {
127 { "DestUnreachs", ICMP_DEST_UNREACH },
128 { "TimeExcds", ICMP_TIME_EXCEEDED },
129 { "ParmProbs", ICMP_PARAMETERPROB },
130 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
131 { "Redirects", ICMP_REDIRECT },
132 { "Echos", ICMP_ECHO },
133 { "EchoReps", ICMP_ECHOREPLY },
134 { "Timestamps", ICMP_TIMESTAMP },
135 { "TimestampReps", ICMP_TIMESTAMPREPLY },
136 { "AddrMasks", ICMP_ADDRESS },
137 { "AddrMaskReps", ICMP_ADDRESSREPLY },
138 { NULL, 0 }
139 };
140
141
142 static const struct snmp_mib snmp4_tcp_list[] = {
143 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
144 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
145 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
146 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
147 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
148 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
149 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
150 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
151 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
152 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
153 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
154 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
155 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
156 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
157 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
158 SNMP_MIB_SENTINEL
159 };
160
161 static const struct snmp_mib snmp4_udp_list[] = {
162 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
163 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
164 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
165 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
166 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
167 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
168 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
169 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
170 SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
171 SNMP_MIB_SENTINEL
172 };
173
174 static const struct snmp_mib snmp4_net_list[] = {
175 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
176 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
177 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
178 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
179 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
180 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
181 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
182 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
183 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
184 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
185 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
186 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
187 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
188 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
189 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
190 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
191 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
192 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
193 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
194 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
195 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
196 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
197 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
198 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
199 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
200 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
201 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
202 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
203 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
204 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
205 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
206 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
207 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
208 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
209 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
210 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
211 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
212 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
213 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
214 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
215 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
216 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
217 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
218 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
219 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
220 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
221 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
222 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
223 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
224 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
225 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
226 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
227 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
228 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
229 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
230 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
231 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
232 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
233 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
234 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
235 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
236 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
237 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
238 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
239 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
240 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
241 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
242 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
243 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
244 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
245 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
246 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
247 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
248 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
249 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
250 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
251 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
252 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
253 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
254 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
255 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
256 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
257 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
258 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
259 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
260 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
261 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
262 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
263 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
264 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
265 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
266 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
267 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
268 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
269 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
270 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
271 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
272 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
273 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
274 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
275 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
276 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
277 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
278 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
279 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
280 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
281 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
282 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
283 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
284 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
285 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
286 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
287 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
288 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
289 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
290 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
291 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
292 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
293 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
294 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
295 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
296 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
297 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
298 SNMP_MIB_SENTINEL
299 };
300
icmpmsg_put_line(struct seq_file * seq,unsigned long * vals,unsigned short * type,int count)301 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
302 unsigned short *type, int count)
303 {
304 int j;
305
306 if (count) {
307 seq_puts(seq, "\nIcmpMsg:");
308 for (j = 0; j < count; ++j)
309 seq_printf(seq, " %sType%u",
310 type[j] & 0x100 ? "Out" : "In",
311 type[j] & 0xff);
312 seq_puts(seq, "\nIcmpMsg:");
313 for (j = 0; j < count; ++j)
314 seq_printf(seq, " %lu", vals[j]);
315 }
316 }
317
icmpmsg_put(struct seq_file * seq)318 static void icmpmsg_put(struct seq_file *seq)
319 {
320 #define PERLINE 16
321
322 int i, count;
323 unsigned short type[PERLINE];
324 unsigned long vals[PERLINE], val;
325 struct net *net = seq->private;
326
327 count = 0;
328 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
329 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
330 if (val) {
331 type[count] = i;
332 vals[count++] = val;
333 }
334 if (count == PERLINE) {
335 icmpmsg_put_line(seq, vals, type, count);
336 count = 0;
337 }
338 }
339 icmpmsg_put_line(seq, vals, type, count);
340
341 #undef PERLINE
342 }
343
icmp_put(struct seq_file * seq)344 static void icmp_put(struct seq_file *seq)
345 {
346 int i;
347 struct net *net = seq->private;
348 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
349
350 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
351 for (i = 0; icmpmibmap[i].name; i++)
352 seq_printf(seq, " In%s", icmpmibmap[i].name);
353 seq_puts(seq, " OutMsgs OutErrors");
354 for (i = 0; icmpmibmap[i].name; i++)
355 seq_printf(seq, " Out%s", icmpmibmap[i].name);
356 seq_printf(seq, "\nIcmp: %lu %lu %lu",
357 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
358 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
359 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
360 for (i = 0; icmpmibmap[i].name; i++)
361 seq_printf(seq, " %lu",
362 atomic_long_read(ptr + icmpmibmap[i].index));
363 seq_printf(seq, " %lu %lu",
364 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
366 for (i = 0; icmpmibmap[i].name; i++)
367 seq_printf(seq, " %lu",
368 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
369 }
370
371 /*
372 * Called from the PROCfs module. This outputs /proc/net/snmp.
373 */
snmp_seq_show_ipstats(struct seq_file * seq,void * v)374 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
375 {
376 struct net *net = seq->private;
377 u64 buff64[IPSTATS_MIB_MAX];
378 int i;
379
380 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
381
382 seq_puts(seq, "Ip: Forwarding DefaultTTL");
383 for (i = 0; snmp4_ipstats_list[i].name; i++)
384 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
385
386 seq_printf(seq, "\nIp: %d %d",
387 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
388 net->ipv4.sysctl_ip_default_ttl);
389
390 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
391 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
392 net->mib.ip_statistics,
393 offsetof(struct ipstats_mib, syncp));
394 for (i = 0; snmp4_ipstats_list[i].name; i++)
395 seq_printf(seq, " %llu", buff64[i]);
396
397 return 0;
398 }
399
snmp_seq_show_tcp_udp(struct seq_file * seq,void * v)400 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
401 {
402 unsigned long buff[TCPUDP_MIB_MAX];
403 struct net *net = seq->private;
404 int i;
405
406 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
407
408 seq_puts(seq, "\nTcp:");
409 for (i = 0; snmp4_tcp_list[i].name; i++)
410 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
411
412 seq_puts(seq, "\nTcp:");
413 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
414 net->mib.tcp_statistics);
415 for (i = 0; snmp4_tcp_list[i].name; i++) {
416 /* MaxConn field is signed, RFC 2012 */
417 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
418 seq_printf(seq, " %ld", buff[i]);
419 else
420 seq_printf(seq, " %lu", buff[i]);
421 }
422
423 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
424
425 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
426 net->mib.udp_statistics);
427 seq_puts(seq, "\nUdp:");
428 for (i = 0; snmp4_udp_list[i].name; i++)
429 seq_printf(seq, " %s", snmp4_udp_list[i].name);
430 seq_puts(seq, "\nUdp:");
431 for (i = 0; snmp4_udp_list[i].name; i++)
432 seq_printf(seq, " %lu", buff[i]);
433
434 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
435
436 /* the UDP and UDP-Lite MIBs are the same */
437 seq_puts(seq, "\nUdpLite:");
438 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
439 net->mib.udplite_statistics);
440 for (i = 0; snmp4_udp_list[i].name; i++)
441 seq_printf(seq, " %s", snmp4_udp_list[i].name);
442 seq_puts(seq, "\nUdpLite:");
443 for (i = 0; snmp4_udp_list[i].name; i++)
444 seq_printf(seq, " %lu", buff[i]);
445
446 seq_putc(seq, '\n');
447 return 0;
448 }
449
snmp_seq_show(struct seq_file * seq,void * v)450 static int snmp_seq_show(struct seq_file *seq, void *v)
451 {
452 snmp_seq_show_ipstats(seq, v);
453
454 icmp_put(seq); /* RFC 2011 compatibility */
455 icmpmsg_put(seq);
456
457 snmp_seq_show_tcp_udp(seq, v);
458
459 return 0;
460 }
461
462 /*
463 * Output /proc/net/netstat
464 */
netstat_seq_show(struct seq_file * seq,void * v)465 static int netstat_seq_show(struct seq_file *seq, void *v)
466 {
467 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
468 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
469 struct net *net = seq->private;
470 unsigned long *buff;
471 int i;
472
473 seq_puts(seq, "TcpExt:");
474 for (i = 0; i < tcp_cnt; i++)
475 seq_printf(seq, " %s", snmp4_net_list[i].name);
476
477 seq_puts(seq, "\nTcpExt:");
478 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
479 GFP_KERNEL);
480 if (buff) {
481 snmp_get_cpu_field_batch(buff, snmp4_net_list,
482 net->mib.net_statistics);
483 for (i = 0; i < tcp_cnt; i++)
484 seq_printf(seq, " %lu", buff[i]);
485 } else {
486 for (i = 0; i < tcp_cnt; i++)
487 seq_printf(seq, " %lu",
488 snmp_fold_field(net->mib.net_statistics,
489 snmp4_net_list[i].entry));
490 }
491 seq_puts(seq, "\nIpExt:");
492 for (i = 0; i < ip_cnt; i++)
493 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
494
495 seq_puts(seq, "\nIpExt:");
496 if (buff) {
497 u64 *buff64 = (u64 *)buff;
498
499 memset(buff64, 0, ip_cnt * sizeof(u64));
500 snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
501 net->mib.ip_statistics,
502 offsetof(struct ipstats_mib, syncp));
503 for (i = 0; i < ip_cnt; i++)
504 seq_printf(seq, " %llu", buff64[i]);
505 } else {
506 for (i = 0; i < ip_cnt; i++)
507 seq_printf(seq, " %llu",
508 snmp_fold_field64(net->mib.ip_statistics,
509 snmp4_ipextstats_list[i].entry,
510 offsetof(struct ipstats_mib, syncp)));
511 }
512 kfree(buff);
513 seq_putc(seq, '\n');
514 mptcp_seq_show(seq);
515 return 0;
516 }
517
ip_proc_init_net(struct net * net)518 static __net_init int ip_proc_init_net(struct net *net)
519 {
520 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
521 sockstat_seq_show, NULL))
522 goto out_sockstat;
523 if (!proc_create_net_single("netstat", 0444, net->proc_net,
524 netstat_seq_show, NULL))
525 goto out_netstat;
526 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
527 NULL))
528 goto out_snmp;
529
530 return 0;
531
532 out_snmp:
533 remove_proc_entry("netstat", net->proc_net);
534 out_netstat:
535 remove_proc_entry("sockstat", net->proc_net);
536 out_sockstat:
537 return -ENOMEM;
538 }
539
ip_proc_exit_net(struct net * net)540 static __net_exit void ip_proc_exit_net(struct net *net)
541 {
542 remove_proc_entry("snmp", net->proc_net);
543 remove_proc_entry("netstat", net->proc_net);
544 remove_proc_entry("sockstat", net->proc_net);
545 }
546
547 static __net_initdata struct pernet_operations ip_proc_ops = {
548 .init = ip_proc_init_net,
549 .exit = ip_proc_exit_net,
550 };
551
ip_misc_proc_init(void)552 int __init ip_misc_proc_init(void)
553 {
554 return register_pernet_subsys(&ip_proc_ops);
555 }
556