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1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * This file implements the various access functions for the
7 * PROC file system. It is mainly used for debugging and
8 * statistics.
9 *
10 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
12 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
13 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
14 *
15 * Fixes:
16 * Alan Cox : UDP sockets show the rxqueue/txqueue
17 * using hint flag for the netinfo.
18 * Pauline Middelink : identd support
19 * Alan Cox : Make /proc safer.
20 * Erik Schoenfelder : /proc/net/snmp
21 * Alan Cox : Handle dead sockets properly.
22 * Gerhard Koerting : Show both timers
23 * Alan Cox : Allow inode to be NULL (kernel socket)
24 * Andi Kleen : Add support for open_requests and
25 * split functions for more readibility.
26 * Andi Kleen : Add support for /proc/net/netstat
27 * Arnaldo C. Melo : Convert to seq_file
28 *
29 * This program is free software; you can redistribute it and/or
30 * modify it under the terms of the GNU General Public License
31 * as published by the Free Software Foundation; either version
32 * 2 of the License, or (at your option) any later version.
33 */
34#include <linux/types.h>
35#include <net/net_namespace.h>
36#include <net/icmp.h>
37#include <net/protocol.h>
38#include <net/tcp.h>
39#include <net/udp.h>
40#include <net/udplite.h>
41#include <linux/bottom_half.h>
42#include <linux/inetdevice.h>
43#include <linux/proc_fs.h>
44#include <linux/seq_file.h>
45#include <linux/export.h>
46#include <net/sock.h>
47#include <net/raw.h>
48
49#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
50
51/*
52 * Report socket allocation statistics [mea@utu.fi]
53 */
54static int sockstat_seq_show(struct seq_file *seq, void *v)
55{
56 struct net *net = seq->private;
57 int orphans, sockets;
58
59 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
60 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
61
62 socket_seq_show(seq);
63 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
64 sock_prot_inuse_get(net, &tcp_prot), orphans,
65 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
66 proto_memory_allocated(&tcp_prot));
67 seq_printf(seq, "UDP: inuse %d mem %ld\n",
68 sock_prot_inuse_get(net, &udp_prot),
69 proto_memory_allocated(&udp_prot));
70 seq_printf(seq, "UDPLITE: inuse %d\n",
71 sock_prot_inuse_get(net, &udplite_prot));
72 seq_printf(seq, "RAW: inuse %d\n",
73 sock_prot_inuse_get(net, &raw_prot));
74 seq_printf(seq, "FRAG: inuse %u memory %lu\n",
75 atomic_read(&net->ipv4.frags.rhashtable.nelems),
76 frag_mem_limit(&net->ipv4.frags));
77 return 0;
78}
79
80static int sockstat_seq_open(struct inode *inode, struct file *file)
81{
82 return single_open_net(inode, file, sockstat_seq_show);
83}
84
85static const struct file_operations sockstat_seq_fops = {
86 .open = sockstat_seq_open,
87 .read = seq_read,
88 .llseek = seq_lseek,
89 .release = single_release_net,
90};
91
92/* snmp items */
93static const struct snmp_mib snmp4_ipstats_list[] = {
94 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
95 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
96 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
97 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
98 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
99 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
100 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
101 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
102 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
103 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
104 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
105 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
106 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
107 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
108 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
109 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
110 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
111 SNMP_MIB_SENTINEL
112};
113
114/* Following items are displayed in /proc/net/netstat */
115static const struct snmp_mib snmp4_ipextstats_list[] = {
116 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
117 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
118 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
119 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
120 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
121 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
122 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
123 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
124 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
125 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
126 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
127 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
128 /* Non RFC4293 fields */
129 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
130 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
131 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
132 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
133 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
134 SNMP_MIB_SENTINEL
135};
136
137static const struct {
138 const char *name;
139 int index;
140} icmpmibmap[] = {
141 { "DestUnreachs", ICMP_DEST_UNREACH },
142 { "TimeExcds", ICMP_TIME_EXCEEDED },
143 { "ParmProbs", ICMP_PARAMETERPROB },
144 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
145 { "Redirects", ICMP_REDIRECT },
146 { "Echos", ICMP_ECHO },
147 { "EchoReps", ICMP_ECHOREPLY },
148 { "Timestamps", ICMP_TIMESTAMP },
149 { "TimestampReps", ICMP_TIMESTAMPREPLY },
150 { "AddrMasks", ICMP_ADDRESS },
151 { "AddrMaskReps", ICMP_ADDRESSREPLY },
152 { NULL, 0 }
153};
154
155
156static const struct snmp_mib snmp4_tcp_list[] = {
157 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
158 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
159 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
160 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
161 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
162 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
163 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
164 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
165 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
166 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
167 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
168 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
169 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
170 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
171 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
172 SNMP_MIB_SENTINEL
173};
174
175static const struct snmp_mib snmp4_udp_list[] = {
176 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
177 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
178 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
179 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
180 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
181 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
182 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
183 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
184 SNMP_MIB_SENTINEL
185};
186
187static const struct snmp_mib snmp4_net_list[] = {
188 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
189 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
190 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
191 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
192 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
193 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
194 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
195 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
196 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
197 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
198 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
199 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
200 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
201 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
202 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
203 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
204 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
205 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
206 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
207 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
208 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
209 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
210 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
211 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
212 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
213 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
214 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
215 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
216 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
217 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
218 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
219 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
220 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
221 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
222 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
223 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
224 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
225 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
226 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
227 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
228 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
229 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
230 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
231 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
232 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
233 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
234 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
235 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
236 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
237 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
238 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
239 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
240 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
241 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
242 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
243 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
244 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
245 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
246 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
247 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
248 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
249 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
250 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
251 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
252 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
253 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
254 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
255 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
256 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
257 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
258 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
259 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
260 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
261 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
262 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
263 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
264 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
265 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
266 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
267 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
268 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
269 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
270 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
271 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
272 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
273 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
274 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
275 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
276 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
277 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
278 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
279 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
280 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
281 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
282 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
283 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
284 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
285 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
286 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
287 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
288 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
289 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
290 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
291 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
292 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
293 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
294 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
295 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
296 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
297 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
298 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
299 SNMP_MIB_SENTINEL
300};
301
302static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
303 unsigned short *type, int count)
304{
305 int j;
306
307 if (count) {
308 seq_puts(seq, "\nIcmpMsg:");
309 for (j = 0; j < count; ++j)
310 seq_printf(seq, " %sType%u",
311 type[j] & 0x100 ? "Out" : "In",
312 type[j] & 0xff);
313 seq_puts(seq, "\nIcmpMsg:");
314 for (j = 0; j < count; ++j)
315 seq_printf(seq, " %lu", vals[j]);
316 }
317}
318
319static void icmpmsg_put(struct seq_file *seq)
320{
321#define PERLINE 16
322
323 int i, count;
324 unsigned short type[PERLINE];
325 unsigned long vals[PERLINE], val;
326 struct net *net = seq->private;
327
328 count = 0;
329 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
330 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
331 if (val) {
332 type[count] = i;
333 vals[count++] = val;
334 }
335 if (count == PERLINE) {
336 icmpmsg_put_line(seq, vals, type, count);
337 count = 0;
338 }
339 }
340 icmpmsg_put_line(seq, vals, type, count);
341
342#undef PERLINE
343}
344
345static void icmp_put(struct seq_file *seq)
346{
347 int i;
348 struct net *net = seq->private;
349 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
350
351 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
352 for (i = 0; icmpmibmap[i].name; i++)
353 seq_printf(seq, " In%s", icmpmibmap[i].name);
354 seq_puts(seq, " OutMsgs OutErrors");
355 for (i = 0; icmpmibmap[i].name; i++)
356 seq_printf(seq, " Out%s", icmpmibmap[i].name);
357 seq_printf(seq, "\nIcmp: %lu %lu %lu",
358 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
359 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
360 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
361 for (i = 0; icmpmibmap[i].name; i++)
362 seq_printf(seq, " %lu",
363 atomic_long_read(ptr + icmpmibmap[i].index));
364 seq_printf(seq, " %lu %lu",
365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
367 for (i = 0; icmpmibmap[i].name; i++)
368 seq_printf(seq, " %lu",
369 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
370}
371
372/*
373 * Called from the PROCfs module. This outputs /proc/net/snmp.
374 */
375static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
376{
377 struct net *net = seq->private;
378 u64 buff64[IPSTATS_MIB_MAX];
379 int i;
380
381 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
382
383 seq_puts(seq, "Ip: Forwarding DefaultTTL");
384 for (i = 0; snmp4_ipstats_list[i].name; i++)
385 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
386
387 seq_printf(seq, "\nIp: %d %d",
388 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
389 net->ipv4.sysctl_ip_default_ttl);
390
391 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
392 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
393 net->mib.ip_statistics,
394 offsetof(struct ipstats_mib, syncp));
395 for (i = 0; snmp4_ipstats_list[i].name; i++)
396 seq_printf(seq, " %llu", buff64[i]);
397
398 return 0;
399}
400
401static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
402{
403 unsigned long buff[TCPUDP_MIB_MAX];
404 struct net *net = seq->private;
405 int i;
406
407 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
408
409 seq_puts(seq, "\nTcp:");
410 for (i = 0; snmp4_tcp_list[i].name; i++)
411 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
412
413 seq_puts(seq, "\nTcp:");
414 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
415 net->mib.tcp_statistics);
416 for (i = 0; snmp4_tcp_list[i].name; i++) {
417 /* MaxConn field is signed, RFC 2012 */
418 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
419 seq_printf(seq, " %ld", buff[i]);
420 else
421 seq_printf(seq, " %lu", buff[i]);
422 }
423
424 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
425
426 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
427 net->mib.udp_statistics);
428 seq_puts(seq, "\nUdp:");
429 for (i = 0; snmp4_udp_list[i].name; i++)
430 seq_printf(seq, " %s", snmp4_udp_list[i].name);
431 seq_puts(seq, "\nUdp:");
432 for (i = 0; snmp4_udp_list[i].name; i++)
433 seq_printf(seq, " %lu", buff[i]);
434
435 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
436
437 /* the UDP and UDP-Lite MIBs are the same */
438 seq_puts(seq, "\nUdpLite:");
439 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
440 net->mib.udplite_statistics);
441 for (i = 0; snmp4_udp_list[i].name; i++)
442 seq_printf(seq, " %s", snmp4_udp_list[i].name);
443 seq_puts(seq, "\nUdpLite:");
444 for (i = 0; snmp4_udp_list[i].name; 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
463static int snmp_seq_open(struct inode *inode, struct file *file)
464{
465 return single_open_net(inode, file, snmp_seq_show);
466}
467
468static const struct file_operations snmp_seq_fops = {
469 .open = snmp_seq_open,
470 .read = seq_read,
471 .llseek = seq_lseek,
472 .release = single_release_net,
473};
474
475
476
477/*
478 * Output /proc/net/netstat
479 */
480static int netstat_seq_show(struct seq_file *seq, void *v)
481{
482 int i;
483 struct net *net = seq->private;
484
485 seq_puts(seq, "TcpExt:");
486 for (i = 0; snmp4_net_list[i].name; i++)
487 seq_printf(seq, " %s", snmp4_net_list[i].name);
488
489 seq_puts(seq, "\nTcpExt:");
490 for (i = 0; snmp4_net_list[i].name; i++)
491 seq_printf(seq, " %lu",
492 snmp_fold_field(net->mib.net_statistics,
493 snmp4_net_list[i].entry));
494
495 seq_puts(seq, "\nIpExt:");
496 for (i = 0; snmp4_ipextstats_list[i].name; i++)
497 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
498
499 seq_puts(seq, "\nIpExt:");
500 for (i = 0; snmp4_ipextstats_list[i].name; i++)
501 seq_printf(seq, " %llu",
502 snmp_fold_field64(net->mib.ip_statistics,
503 snmp4_ipextstats_list[i].entry,
504 offsetof(struct ipstats_mib, syncp)));
505
506 seq_putc(seq, '\n');
507 return 0;
508}
509
510static int netstat_seq_open(struct inode *inode, struct file *file)
511{
512 return single_open_net(inode, file, netstat_seq_show);
513}
514
515static const struct file_operations netstat_seq_fops = {
516 .open = netstat_seq_open,
517 .read = seq_read,
518 .llseek = seq_lseek,
519 .release = single_release_net,
520};
521
522static __net_init int ip_proc_init_net(struct net *net)
523{
524 if (!proc_create("sockstat", 0444, net->proc_net,
525 &sockstat_seq_fops))
526 goto out_sockstat;
527 if (!proc_create("netstat", 0444, net->proc_net, &netstat_seq_fops))
528 goto out_netstat;
529 if (!proc_create("snmp", 0444, net->proc_net, &snmp_seq_fops))
530 goto out_snmp;
531
532 return 0;
533
534out_snmp:
535 remove_proc_entry("netstat", net->proc_net);
536out_netstat:
537 remove_proc_entry("sockstat", net->proc_net);
538out_sockstat:
539 return -ENOMEM;
540}
541
542static __net_exit void ip_proc_exit_net(struct net *net)
543{
544 remove_proc_entry("snmp", net->proc_net);
545 remove_proc_entry("netstat", net->proc_net);
546 remove_proc_entry("sockstat", net->proc_net);
547}
548
549static __net_initdata struct pernet_operations ip_proc_ops = {
550 .init = ip_proc_init_net,
551 .exit = ip_proc_exit_net,
552};
553
554int __init ip_misc_proc_init(void)
555{
556 return register_pernet_subsys(&ip_proc_ops);
557}
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 */
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, "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 */
78static 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 */
100static 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
123static 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
142static 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
161static 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
174static 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_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
299 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
300 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH),
301 SNMP_MIB_SENTINEL
302};
303
304static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
305 unsigned short *type, int count)
306{
307 int j;
308
309 if (count) {
310 seq_puts(seq, "\nIcmpMsg:");
311 for (j = 0; j < count; ++j)
312 seq_printf(seq, " %sType%u",
313 type[j] & 0x100 ? "Out" : "In",
314 type[j] & 0xff);
315 seq_puts(seq, "\nIcmpMsg:");
316 for (j = 0; j < count; ++j)
317 seq_printf(seq, " %lu", vals[j]);
318 }
319}
320
321static void icmpmsg_put(struct seq_file *seq)
322{
323#define PERLINE 16
324
325 int i, count;
326 unsigned short type[PERLINE];
327 unsigned long vals[PERLINE], val;
328 struct net *net = seq->private;
329
330 count = 0;
331 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
332 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
333 if (val) {
334 type[count] = i;
335 vals[count++] = val;
336 }
337 if (count == PERLINE) {
338 icmpmsg_put_line(seq, vals, type, count);
339 count = 0;
340 }
341 }
342 icmpmsg_put_line(seq, vals, type, count);
343
344#undef PERLINE
345}
346
347static void icmp_put(struct seq_file *seq)
348{
349 int i;
350 struct net *net = seq->private;
351 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
352
353 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
354 for (i = 0; icmpmibmap[i].name; i++)
355 seq_printf(seq, " In%s", icmpmibmap[i].name);
356 seq_puts(seq, " OutMsgs OutErrors");
357 for (i = 0; icmpmibmap[i].name; i++)
358 seq_printf(seq, " Out%s", icmpmibmap[i].name);
359 seq_printf(seq, "\nIcmp: %lu %lu %lu",
360 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
361 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
362 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
363 for (i = 0; icmpmibmap[i].name; i++)
364 seq_printf(seq, " %lu",
365 atomic_long_read(ptr + icmpmibmap[i].index));
366 seq_printf(seq, " %lu %lu",
367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
369 for (i = 0; icmpmibmap[i].name; i++)
370 seq_printf(seq, " %lu",
371 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
372}
373
374/*
375 * Called from the PROCfs module. This outputs /proc/net/snmp.
376 */
377static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
378{
379 struct net *net = seq->private;
380 u64 buff64[IPSTATS_MIB_MAX];
381 int i;
382
383 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
384
385 seq_puts(seq, "Ip: Forwarding DefaultTTL");
386 for (i = 0; snmp4_ipstats_list[i].name; i++)
387 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
388
389 seq_printf(seq, "\nIp: %d %d",
390 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
391 READ_ONCE(net->ipv4.sysctl_ip_default_ttl));
392
393 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
394 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
395 net->mib.ip_statistics,
396 offsetof(struct ipstats_mib, syncp));
397 for (i = 0; snmp4_ipstats_list[i].name; i++)
398 seq_printf(seq, " %llu", buff64[i]);
399
400 return 0;
401}
402
403static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
404{
405 unsigned long buff[TCPUDP_MIB_MAX];
406 struct net *net = seq->private;
407 int i;
408
409 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
410
411 seq_puts(seq, "\nTcp:");
412 for (i = 0; snmp4_tcp_list[i].name; i++)
413 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
414
415 seq_puts(seq, "\nTcp:");
416 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
417 net->mib.tcp_statistics);
418 for (i = 0; snmp4_tcp_list[i].name; i++) {
419 /* MaxConn field is signed, RFC 2012 */
420 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
421 seq_printf(seq, " %ld", buff[i]);
422 else
423 seq_printf(seq, " %lu", buff[i]);
424 }
425
426 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
427
428 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
429 net->mib.udp_statistics);
430 seq_puts(seq, "\nUdp:");
431 for (i = 0; snmp4_udp_list[i].name; i++)
432 seq_printf(seq, " %s", snmp4_udp_list[i].name);
433 seq_puts(seq, "\nUdp:");
434 for (i = 0; snmp4_udp_list[i].name; i++)
435 seq_printf(seq, " %lu", buff[i]);
436
437 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
438
439 /* the UDP and UDP-Lite MIBs are the same */
440 seq_puts(seq, "\nUdpLite:");
441 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
442 net->mib.udplite_statistics);
443 for (i = 0; snmp4_udp_list[i].name; i++)
444 seq_printf(seq, " %s", snmp4_udp_list[i].name);
445 seq_puts(seq, "\nUdpLite:");
446 for (i = 0; snmp4_udp_list[i].name; i++)
447 seq_printf(seq, " %lu", buff[i]);
448
449 seq_putc(seq, '\n');
450 return 0;
451}
452
453static int snmp_seq_show(struct seq_file *seq, void *v)
454{
455 snmp_seq_show_ipstats(seq, v);
456
457 icmp_put(seq); /* RFC 2011 compatibility */
458 icmpmsg_put(seq);
459
460 snmp_seq_show_tcp_udp(seq, v);
461
462 return 0;
463}
464
465/*
466 * Output /proc/net/netstat
467 */
468static int netstat_seq_show(struct seq_file *seq, void *v)
469{
470 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
471 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
472 struct net *net = seq->private;
473 unsigned long *buff;
474 int i;
475
476 seq_puts(seq, "TcpExt:");
477 for (i = 0; i < tcp_cnt; i++)
478 seq_printf(seq, " %s", snmp4_net_list[i].name);
479
480 seq_puts(seq, "\nTcpExt:");
481 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
482 GFP_KERNEL);
483 if (buff) {
484 snmp_get_cpu_field_batch(buff, snmp4_net_list,
485 net->mib.net_statistics);
486 for (i = 0; i < tcp_cnt; i++)
487 seq_printf(seq, " %lu", buff[i]);
488 } else {
489 for (i = 0; i < tcp_cnt; i++)
490 seq_printf(seq, " %lu",
491 snmp_fold_field(net->mib.net_statistics,
492 snmp4_net_list[i].entry));
493 }
494 seq_puts(seq, "\nIpExt:");
495 for (i = 0; i < ip_cnt; i++)
496 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
497
498 seq_puts(seq, "\nIpExt:");
499 if (buff) {
500 u64 *buff64 = (u64 *)buff;
501
502 memset(buff64, 0, ip_cnt * sizeof(u64));
503 snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
504 net->mib.ip_statistics,
505 offsetof(struct ipstats_mib, syncp));
506 for (i = 0; i < ip_cnt; i++)
507 seq_printf(seq, " %llu", buff64[i]);
508 } else {
509 for (i = 0; i < ip_cnt; i++)
510 seq_printf(seq, " %llu",
511 snmp_fold_field64(net->mib.ip_statistics,
512 snmp4_ipextstats_list[i].entry,
513 offsetof(struct ipstats_mib, syncp)));
514 }
515 kfree(buff);
516 seq_putc(seq, '\n');
517 mptcp_seq_show(seq);
518 return 0;
519}
520
521static __net_init int ip_proc_init_net(struct net *net)
522{
523 if (!proc_create_net_single("sockstat", 0444, net->proc_net,
524 sockstat_seq_show, NULL))
525 goto out_sockstat;
526 if (!proc_create_net_single("netstat", 0444, net->proc_net,
527 netstat_seq_show, NULL))
528 goto out_netstat;
529 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
530 NULL))
531 goto out_snmp;
532
533 return 0;
534
535out_snmp:
536 remove_proc_entry("netstat", net->proc_net);
537out_netstat:
538 remove_proc_entry("sockstat", net->proc_net);
539out_sockstat:
540 return -ENOMEM;
541}
542
543static __net_exit void ip_proc_exit_net(struct net *net)
544{
545 remove_proc_entry("snmp", net->proc_net);
546 remove_proc_entry("netstat", net->proc_net);
547 remove_proc_entry("sockstat", net->proc_net);
548}
549
550static __net_initdata struct pernet_operations ip_proc_ops = {
551 .init = ip_proc_init_net,
552 .exit = ip_proc_exit_net,
553};
554
555int __init ip_misc_proc_init(void)
556{
557 return register_pernet_subsys(&ip_proc_ops);
558}