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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, <[email protected]>
12 * Gerald J. Heim, <[email protected]>
13 * Fred Baumgarten, <[email protected]>
14 * Erik Schoenfelder, <[email protected]>
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 <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 [[email protected]]
50 */
51static 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, "RAW: inuse %d\n",
68 sock_prot_inuse_get(net, &raw_prot));
69 seq_printf(seq, "FRAG: inuse %u memory %lu\n",
70 atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
71 frag_mem_limit(net->ipv4.fqdir));
72 return 0;
73}
74
75/* snmp items */
76static const struct snmp_mib snmp4_ipstats_list[] = {
77 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
78 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
79 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
80 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
81 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
82 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
83 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
84 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
85 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
86 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
87 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
88 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
89 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
90 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
91 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
92 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
93 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
94 SNMP_MIB_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS),
95};
96
97/* Following items are displayed in /proc/net/netstat */
98static const struct snmp_mib snmp4_ipextstats_list[] = {
99 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
100 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
101 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
102 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
103 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
104 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
105 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
106 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
107 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
108 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
109 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
110 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
111 /* Non RFC4293 fields */
112 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
113 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
114 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
115 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
116 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
117 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
118};
119
120static const struct {
121 const char *name;
122 int index;
123} icmpmibmap[] = {
124 { "DestUnreachs", ICMP_DEST_UNREACH },
125 { "TimeExcds", ICMP_TIME_EXCEEDED },
126 { "ParmProbs", ICMP_PARAMETERPROB },
127 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
128 { "Redirects", ICMP_REDIRECT },
129 { "Echos", ICMP_ECHO },
130 { "EchoReps", ICMP_ECHOREPLY },
131 { "Timestamps", ICMP_TIMESTAMP },
132 { "TimestampReps", ICMP_TIMESTAMPREPLY },
133 { "AddrMasks", ICMP_ADDRESS },
134 { "AddrMaskReps", ICMP_ADDRESSREPLY },
135 { NULL, 0 }
136};
137
138
139static const struct snmp_mib snmp4_tcp_list[] = {
140 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
141 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
142 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
143 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
144 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
145 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
146 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
147 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
148 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
149 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
150 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
151 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
152 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
153 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
154 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
155};
156
157static const struct snmp_mib snmp4_udp_list[] = {
158 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
159 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
160 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
161 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
162 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
163 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
164 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
165 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
166 SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
167};
168
169static const struct snmp_mib snmp4_net_list[] = {
170 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
171 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
172 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
173 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
174 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
175 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
176 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
177 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
178 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
179 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
180 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
181 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
182 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
183 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
184 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
185 SNMP_MIB_ITEM("BeyondWindow", LINUX_MIB_BEYOND_WINDOW),
186 SNMP_MIB_ITEM("TSEcrRejected", LINUX_MIB_TSECRREJECTED),
187 SNMP_MIB_ITEM("PAWSOldAck", LINUX_MIB_PAWS_OLD_ACK),
188 SNMP_MIB_ITEM("PAWSTimewait", LINUX_MIB_PAWS_TW_REJECTED),
189 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
190 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
191 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
192 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
193 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
194 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
195 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
196 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
197 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
198 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
199 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
200 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
201 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
202 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
203 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
204 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
205 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
206 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
207 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
208 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
209 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
210 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
211 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
212 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
213 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
214 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
215 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
216 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
217 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
218 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
219 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
220 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
221 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
222 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
223 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
224 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
225 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
226 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
227 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
228 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
229 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
230 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
231 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
232 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
233 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
234 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
235 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
236 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
237 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
238 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
239 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
240 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
241 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
242 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
243 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
244 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
245 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
246 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
247 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
248 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
249 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
250 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
251 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
252 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
253 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
254 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
255 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
256 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
257 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
258 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
259 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
260 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
261 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
262 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
263 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
264 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
265 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
266 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
267 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
268 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
269 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
270 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
271 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
272 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
273 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
274 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
275 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
276 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
277 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
278 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
279 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
280 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
281 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
282 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
283 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
284 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
285 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
286 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
287 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
288 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
289 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
290 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
291 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
292 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
293 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
294 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
295 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
296 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
297 SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
298 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
299 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH),
300 SNMP_MIB_ITEM("TCPAORequired", LINUX_MIB_TCPAOREQUIRED),
301 SNMP_MIB_ITEM("TCPAOBad", LINUX_MIB_TCPAOBAD),
302 SNMP_MIB_ITEM("TCPAOKeyNotFound", LINUX_MIB_TCPAOKEYNOTFOUND),
303 SNMP_MIB_ITEM("TCPAOGood", LINUX_MIB_TCPAOGOOD),
304 SNMP_MIB_ITEM("TCPAODroppedIcmps", LINUX_MIB_TCPAODROPPEDICMPS),
305};
306
307static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
308 unsigned short *type, int count)
309{
310 int j;
311
312 if (count) {
313 seq_puts(seq, "\nIcmpMsg:");
314 for (j = 0; j < count; ++j)
315 seq_printf(seq, " %sType%u",
316 type[j] & 0x100 ? "Out" : "In",
317 type[j] & 0xff);
318 seq_puts(seq, "\nIcmpMsg:");
319 for (j = 0; j < count; ++j)
320 seq_printf(seq, " %lu", vals[j]);
321 }
322}
323
324static void icmpmsg_put(struct seq_file *seq)
325{
326#define PERLINE 16
327
328 int i, count;
329 unsigned short type[PERLINE];
330 unsigned long vals[PERLINE], val;
331 struct net *net = seq->private;
332
333 count = 0;
334 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
335 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
336 if (val) {
337 type[count] = i;
338 vals[count++] = val;
339 }
340 if (count == PERLINE) {
341 icmpmsg_put_line(seq, vals, type, count);
342 count = 0;
343 }
344 }
345 icmpmsg_put_line(seq, vals, type, count);
346
347#undef PERLINE
348}
349
350static void icmp_put(struct seq_file *seq)
351{
352 int i;
353 struct net *net = seq->private;
354 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
355
356 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
357 for (i = 0; icmpmibmap[i].name; i++)
358 seq_printf(seq, " In%s", icmpmibmap[i].name);
359 seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost");
360 for (i = 0; icmpmibmap[i].name; i++)
361 seq_printf(seq, " Out%s", icmpmibmap[i].name);
362 seq_printf(seq, "\nIcmp: %lu %lu %lu",
363 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
364 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
366 for (i = 0; icmpmibmap[i].name; i++)
367 seq_printf(seq, " %lu",
368 atomic_long_read(ptr + icmpmibmap[i].index));
369 seq_printf(seq, " %lu %lu %lu %lu",
370 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
371 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS),
372 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL),
373 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST));
374 for (i = 0; icmpmibmap[i].name; i++)
375 seq_printf(seq, " %lu",
376 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
377}
378
379/*
380 * Called from the PROCfs module. This outputs /proc/net/snmp.
381 */
382static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
383{
384 const int cnt = ARRAY_SIZE(snmp4_ipstats_list);
385 u64 buff64[ARRAY_SIZE(snmp4_ipstats_list)];
386 struct net *net = seq->private;
387 int i;
388
389 memset(buff64, 0, sizeof(buff64));
390
391 seq_puts(seq, "Ip: Forwarding DefaultTTL");
392 for (i = 0; i < cnt; i++)
393 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
394
395 seq_printf(seq, "\nIp: %d %d",
396 IPV4_DEVCONF_ALL_RO(net, FORWARDING) ? 1 : 2,
397 READ_ONCE(net->ipv4.sysctl_ip_default_ttl));
398
399 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
400 snmp_get_cpu_field64_batch_cnt(buff64, snmp4_ipstats_list, cnt,
401 net->mib.ip_statistics,
402 offsetof(struct ipstats_mib, syncp));
403 for (i = 0; i < cnt; i++)
404 seq_printf(seq, " %llu", buff64[i]);
405
406 return 0;
407}
408
409static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
410{
411 const int udp_cnt = ARRAY_SIZE(snmp4_udp_list);
412 const int tcp_cnt = ARRAY_SIZE(snmp4_tcp_list);
413 unsigned long buff[TCPUDP_MIB_MAX];
414 struct net *net = seq->private;
415 int i;
416
417 memset(buff, 0, tcp_cnt * sizeof(unsigned long));
418
419 seq_puts(seq, "\nTcp:");
420 for (i = 0; i < tcp_cnt; i++)
421 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
422
423 seq_puts(seq, "\nTcp:");
424 snmp_get_cpu_field_batch_cnt(buff, snmp4_tcp_list,
425 tcp_cnt,
426 net->mib.tcp_statistics);
427 for (i = 0; i < tcp_cnt; 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, udp_cnt * sizeof(unsigned long));
436
437 snmp_get_cpu_field_batch_cnt(buff, snmp4_udp_list,
438 udp_cnt,
439 net->mib.udp_statistics);
440 seq_puts(seq, "\nUdp:");
441 for (i = 0; i < udp_cnt; i++)
442 seq_printf(seq, " %s", snmp4_udp_list[i].name);
443 seq_puts(seq, "\nUdp:");
444 for (i = 0; i < udp_cnt; i++)
445 seq_printf(seq, " %lu", buff[i]);
446
447 seq_putc(seq, '\n');
448 return 0;
449}
450
451static int snmp_seq_show(struct seq_file *seq, void *v)
452{
453 snmp_seq_show_ipstats(seq, v);
454
455 icmp_put(seq); /* RFC 2011 compatibility */
456 icmpmsg_put(seq);
457
458 snmp_seq_show_tcp_udp(seq, v);
459
460 return 0;
461}
462
463/*
464 * Output /proc/net/netstat
465 */
466static int netstat_seq_show(struct seq_file *seq, void *v)
467{
468 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list);
469 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list);
470 struct net *net = seq->private;
471 unsigned long *buff;
472 int i;
473
474 seq_puts(seq, "TcpExt:");
475 for (i = 0; i < tcp_cnt; i++)
476 seq_printf(seq, " %s", snmp4_net_list[i].name);
477
478 seq_puts(seq, "\nTcpExt:");
479 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
480 GFP_KERNEL);
481 if (buff) {
482 snmp_get_cpu_field_batch_cnt(buff, snmp4_net_list, tcp_cnt,
483 net->mib.net_statistics);
484 for (i = 0; i < tcp_cnt; i++)
485 seq_printf(seq, " %lu", buff[i]);
486 } else {
487 for (i = 0; i < tcp_cnt; i++)
488 seq_printf(seq, " %lu",
489 snmp_fold_field(net->mib.net_statistics,
490 snmp4_net_list[i].entry));
491 }
492 seq_puts(seq, "\nIpExt:");
493 for (i = 0; i < ip_cnt; i++)
494 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
495
496 seq_puts(seq, "\nIpExt:");
497 if (buff) {
498 u64 *buff64 = (u64 *)buff;
499
500 memset(buff64, 0, ip_cnt * sizeof(u64));
501 snmp_get_cpu_field64_batch_cnt(buff64, snmp4_ipextstats_list, ip_cnt,
502 net->mib.ip_statistics,
503 offsetof(struct ipstats_mib, syncp));
504 for (i = 0; i < ip_cnt; i++)
505 seq_printf(seq, " %llu", buff64[i]);
506 } else {
507 for (i = 0; i < ip_cnt; i++)
508 seq_printf(seq, " %llu",
509 snmp_fold_field64(net->mib.ip_statistics,
510 snmp4_ipextstats_list[i].entry,
511 offsetof(struct ipstats_mib, syncp)));
512 }
513 kfree(buff);
514 seq_putc(seq, '\n');
515 mptcp_seq_show(seq);
516 return 0;
517}
518
519static __net_init int ip_proc_init_net(struct net *net)
520{
521 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
522 sockstat_seq_show, NULL))
523 goto out_sockstat;
524 if (!proc_create_net_single("netstat", 0444, net->proc_net,
525 netstat_seq_show, NULL))
526 goto out_netstat;
527 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
528 NULL))
529 goto out_snmp;
530
531 return 0;
532
533out_snmp:
534 remove_proc_entry("netstat", net->proc_net);
535out_netstat:
536 remove_proc_entry("sockstat", net->proc_net);
537out_sockstat:
538 return -ENOMEM;
539}
540
541static __net_exit void ip_proc_exit_net(struct net *net)
542{
543 remove_proc_entry("snmp", net->proc_net);
544 remove_proc_entry("netstat", net->proc_net);
545 remove_proc_entry("sockstat", net->proc_net);
546}
547
548static __net_initdata struct pernet_operations ip_proc_ops = {
549 .init = ip_proc_init_net,
550 .exit = ip_proc_exit_net,
551};
552
553int __init ip_misc_proc_init(void)
554{
555 return register_pernet_subsys(&ip_proc_ops);
556}