Line data Source code
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 : */
51 0 : static int sockstat_seq_show(struct seq_file *seq, void *v)
52 : {
53 0 : struct net *net = seq->private;
54 0 : int orphans, sockets;
55 :
56 0 : orphans = percpu_counter_sum_positive(&tcp_orphan_count);
57 0 : sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
58 :
59 0 : socket_seq_show(seq);
60 0 : 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 0 : atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
63 : proto_memory_allocated(&tcp_prot));
64 0 : seq_printf(seq, "UDP: inuse %d mem %ld\n",
65 : sock_prot_inuse_get(net, &udp_prot),
66 : proto_memory_allocated(&udp_prot));
67 0 : seq_printf(seq, "UDPLITE: inuse %d\n",
68 : sock_prot_inuse_get(net, &udplite_prot));
69 0 : seq_printf(seq, "RAW: inuse %d\n",
70 : sock_prot_inuse_get(net, &raw_prot));
71 0 : seq_printf(seq, "FRAG: inuse %u memory %lu\n",
72 0 : atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
73 0 : frag_mem_limit(net->ipv4.fqdir));
74 0 : 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 :
301 0 : static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
302 : unsigned short *type, int count)
303 : {
304 0 : int j;
305 :
306 0 : if (count) {
307 0 : seq_puts(seq, "\nIcmpMsg:");
308 0 : for (j = 0; j < count; ++j)
309 0 : seq_printf(seq, " %sType%u",
310 : type[j] & 0x100 ? "Out" : "In",
311 0 : type[j] & 0xff);
312 0 : seq_puts(seq, "\nIcmpMsg:");
313 0 : for (j = 0; j < count; ++j)
314 0 : seq_printf(seq, " %lu", vals[j]);
315 : }
316 0 : }
317 :
318 0 : static void icmpmsg_put(struct seq_file *seq)
319 : {
320 : #define PERLINE 16
321 :
322 0 : int i, count;
323 0 : unsigned short type[PERLINE];
324 0 : unsigned long vals[PERLINE], val;
325 0 : struct net *net = seq->private;
326 :
327 0 : count = 0;
328 0 : for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
329 0 : val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
330 0 : if (val) {
331 0 : type[count] = i;
332 0 : vals[count++] = val;
333 : }
334 0 : if (count == PERLINE) {
335 0 : icmpmsg_put_line(seq, vals, type, count);
336 0 : count = 0;
337 : }
338 : }
339 0 : icmpmsg_put_line(seq, vals, type, count);
340 :
341 : #undef PERLINE
342 0 : }
343 :
344 0 : static void icmp_put(struct seq_file *seq)
345 : {
346 0 : int i;
347 0 : struct net *net = seq->private;
348 0 : atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
349 :
350 0 : seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
351 0 : for (i = 0; icmpmibmap[i].name; i++)
352 0 : seq_printf(seq, " In%s", icmpmibmap[i].name);
353 0 : seq_puts(seq, " OutMsgs OutErrors");
354 0 : for (i = 0; icmpmibmap[i].name; i++)
355 0 : seq_printf(seq, " Out%s", icmpmibmap[i].name);
356 0 : seq_printf(seq, "\nIcmp: %lu %lu %lu",
357 0 : snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
358 0 : snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
359 0 : snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
360 0 : for (i = 0; icmpmibmap[i].name; i++)
361 0 : seq_printf(seq, " %lu",
362 0 : atomic_long_read(ptr + icmpmibmap[i].index));
363 0 : seq_printf(seq, " %lu %lu",
364 0 : snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
365 0 : snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
366 0 : for (i = 0; icmpmibmap[i].name; i++)
367 0 : seq_printf(seq, " %lu",
368 0 : atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
369 0 : }
370 :
371 : /*
372 : * Called from the PROCfs module. This outputs /proc/net/snmp.
373 : */
374 0 : static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
375 : {
376 0 : struct net *net = seq->private;
377 0 : u64 buff64[IPSTATS_MIB_MAX];
378 0 : int i;
379 :
380 0 : memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
381 :
382 0 : seq_puts(seq, "Ip: Forwarding DefaultTTL");
383 0 : for (i = 0; snmp4_ipstats_list[i].name; i++)
384 0 : seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
385 :
386 0 : seq_printf(seq, "\nIp: %d %d",
387 0 : IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
388 : net->ipv4.sysctl_ip_default_ttl);
389 :
390 0 : BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
391 0 : snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
392 : net->mib.ip_statistics,
393 : offsetof(struct ipstats_mib, syncp));
394 0 : for (i = 0; snmp4_ipstats_list[i].name; i++)
395 0 : seq_printf(seq, " %llu", buff64[i]);
396 :
397 0 : return 0;
398 : }
399 :
400 0 : static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
401 : {
402 0 : unsigned long buff[TCPUDP_MIB_MAX];
403 0 : struct net *net = seq->private;
404 0 : int i;
405 :
406 0 : memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
407 :
408 0 : seq_puts(seq, "\nTcp:");
409 0 : for (i = 0; snmp4_tcp_list[i].name; i++)
410 0 : seq_printf(seq, " %s", snmp4_tcp_list[i].name);
411 :
412 0 : seq_puts(seq, "\nTcp:");
413 0 : snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
414 : net->mib.tcp_statistics);
415 0 : for (i = 0; snmp4_tcp_list[i].name; i++) {
416 : /* MaxConn field is signed, RFC 2012 */
417 0 : if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
418 0 : seq_printf(seq, " %ld", buff[i]);
419 : else
420 0 : seq_printf(seq, " %lu", buff[i]);
421 : }
422 :
423 0 : memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
424 :
425 0 : snmp_get_cpu_field_batch(buff, snmp4_udp_list,
426 0 : net->mib.udp_statistics);
427 0 : seq_puts(seq, "\nUdp:");
428 0 : for (i = 0; snmp4_udp_list[i].name; i++)
429 0 : seq_printf(seq, " %s", snmp4_udp_list[i].name);
430 0 : seq_puts(seq, "\nUdp:");
431 0 : for (i = 0; snmp4_udp_list[i].name; i++)
432 0 : seq_printf(seq, " %lu", buff[i]);
433 :
434 0 : memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
435 :
436 : /* the UDP and UDP-Lite MIBs are the same */
437 0 : seq_puts(seq, "\nUdpLite:");
438 0 : snmp_get_cpu_field_batch(buff, snmp4_udp_list,
439 : net->mib.udplite_statistics);
440 0 : for (i = 0; snmp4_udp_list[i].name; i++)
441 0 : seq_printf(seq, " %s", snmp4_udp_list[i].name);
442 0 : seq_puts(seq, "\nUdpLite:");
443 0 : for (i = 0; snmp4_udp_list[i].name; i++)
444 0 : seq_printf(seq, " %lu", buff[i]);
445 :
446 0 : seq_putc(seq, '\n');
447 0 : return 0;
448 : }
449 :
450 0 : static int snmp_seq_show(struct seq_file *seq, void *v)
451 : {
452 0 : snmp_seq_show_ipstats(seq, v);
453 :
454 0 : icmp_put(seq); /* RFC 2011 compatibility */
455 0 : icmpmsg_put(seq);
456 :
457 0 : snmp_seq_show_tcp_udp(seq, v);
458 :
459 0 : return 0;
460 : }
461 :
462 : /*
463 : * Output /proc/net/netstat
464 : */
465 0 : static int netstat_seq_show(struct seq_file *seq, void *v)
466 : {
467 0 : const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
468 0 : const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
469 0 : struct net *net = seq->private;
470 0 : unsigned long *buff;
471 0 : int i;
472 :
473 0 : seq_puts(seq, "TcpExt:");
474 0 : for (i = 0; i < tcp_cnt; i++)
475 0 : seq_printf(seq, " %s", snmp4_net_list[i].name);
476 :
477 0 : seq_puts(seq, "\nTcpExt:");
478 0 : buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
479 : GFP_KERNEL);
480 0 : if (buff) {
481 0 : snmp_get_cpu_field_batch(buff, snmp4_net_list,
482 : net->mib.net_statistics);
483 0 : for (i = 0; i < tcp_cnt; i++)
484 0 : seq_printf(seq, " %lu", buff[i]);
485 : } else {
486 0 : for (i = 0; i < tcp_cnt; i++)
487 0 : seq_printf(seq, " %lu",
488 0 : snmp_fold_field(net->mib.net_statistics,
489 : snmp4_net_list[i].entry));
490 : }
491 0 : seq_puts(seq, "\nIpExt:");
492 0 : for (i = 0; i < ip_cnt; i++)
493 0 : seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
494 :
495 0 : seq_puts(seq, "\nIpExt:");
496 0 : if (buff) {
497 0 : u64 *buff64 = (u64 *)buff;
498 :
499 0 : memset(buff64, 0, ip_cnt * sizeof(u64));
500 0 : snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
501 : net->mib.ip_statistics,
502 : offsetof(struct ipstats_mib, syncp));
503 0 : for (i = 0; i < ip_cnt; i++)
504 0 : seq_printf(seq, " %llu", buff64[i]);
505 : } else {
506 0 : for (i = 0; i < ip_cnt; i++)
507 0 : seq_printf(seq, " %llu",
508 0 : snmp_fold_field64(net->mib.ip_statistics,
509 : snmp4_ipextstats_list[i].entry,
510 : offsetof(struct ipstats_mib, syncp)));
511 : }
512 0 : kfree(buff);
513 0 : seq_putc(seq, '\n');
514 0 : mptcp_seq_show(seq);
515 0 : return 0;
516 : }
517 :
518 1 : static __net_init int ip_proc_init_net(struct net *net)
519 : {
520 1 : if (!proc_create_net_single("sockstat", 0444, net->proc_net,
521 : sockstat_seq_show, NULL))
522 0 : goto out_sockstat;
523 1 : if (!proc_create_net_single("netstat", 0444, net->proc_net,
524 : netstat_seq_show, NULL))
525 0 : goto out_netstat;
526 1 : if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
527 : NULL))
528 0 : goto out_snmp;
529 :
530 : return 0;
531 :
532 0 : out_snmp:
533 0 : remove_proc_entry("netstat", net->proc_net);
534 0 : out_netstat:
535 0 : remove_proc_entry("sockstat", net->proc_net);
536 : out_sockstat:
537 : return -ENOMEM;
538 : }
539 :
540 0 : static __net_exit void ip_proc_exit_net(struct net *net)
541 : {
542 0 : remove_proc_entry("snmp", net->proc_net);
543 0 : remove_proc_entry("netstat", net->proc_net);
544 0 : remove_proc_entry("sockstat", net->proc_net);
545 0 : }
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 :
552 1 : int __init ip_misc_proc_init(void)
553 : {
554 1 : return register_pernet_subsys(&ip_proc_ops);
555 : }
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