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 /*
50 * Report socket allocation statistics [mea@utu.fi]
51 */
sockstat_seq_show(struct seq_file * seq,void * v)52 static int sockstat_seq_show(struct seq_file *seq, void *v)
53 {
54 struct net *net = seq->private;
55 int orphans, sockets;
56
57 local_bh_disable();
58 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
59 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
60 local_bh_enable();
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(&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
sockstat_seq_open(struct inode * inode,struct file * file)80 static int sockstat_seq_open(struct inode *inode, struct file *file)
81 {
82 return single_open_net(inode, file, sockstat_seq_show);
83 }
84
85 static const struct file_operations sockstat_seq_fops = {
86 .owner = THIS_MODULE,
87 .open = sockstat_seq_open,
88 .read = seq_read,
89 .llseek = seq_lseek,
90 .release = single_release_net,
91 };
92
93 /* snmp items */
94 static const struct snmp_mib snmp4_ipstats_list[] = {
95 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
96 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
97 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
98 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
99 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
100 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
101 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
102 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
103 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
104 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
105 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
106 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
107 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
108 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
109 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
110 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
111 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
112 SNMP_MIB_SENTINEL
113 };
114
115 /* Following items are displayed in /proc/net/netstat */
116 static const struct snmp_mib snmp4_ipextstats_list[] = {
117 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
118 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
119 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
120 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
121 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
122 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
123 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
124 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
125 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
126 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
127 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
128 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
129 /* Non RFC4293 fields */
130 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
131 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
132 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
133 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
134 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
135 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
136 SNMP_MIB_SENTINEL
137 };
138
139 static const struct {
140 const char *name;
141 int index;
142 } icmpmibmap[] = {
143 { "DestUnreachs", ICMP_DEST_UNREACH },
144 { "TimeExcds", ICMP_TIME_EXCEEDED },
145 { "ParmProbs", ICMP_PARAMETERPROB },
146 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
147 { "Redirects", ICMP_REDIRECT },
148 { "Echos", ICMP_ECHO },
149 { "EchoReps", ICMP_ECHOREPLY },
150 { "Timestamps", ICMP_TIMESTAMP },
151 { "TimestampReps", ICMP_TIMESTAMPREPLY },
152 { "AddrMasks", ICMP_ADDRESS },
153 { "AddrMaskReps", ICMP_ADDRESSREPLY },
154 { NULL, 0 }
155 };
156
157
158 static const struct snmp_mib snmp4_tcp_list[] = {
159 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
160 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
161 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
162 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
163 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
164 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
165 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
166 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
167 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
168 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
169 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
170 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
171 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
172 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
173 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
174 SNMP_MIB_SENTINEL
175 };
176
177 static const struct snmp_mib snmp4_udp_list[] = {
178 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
179 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
180 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
181 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
182 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
183 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
184 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
185 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
186 SNMP_MIB_SENTINEL
187 };
188
189 static const struct snmp_mib snmp4_net_list[] = {
190 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
191 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
192 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
193 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
194 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
195 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
196 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
197 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
198 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
199 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
200 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
201 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
202 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
203 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
204 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
205 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
206 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
207 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
208 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
209 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
210 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
211 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
212 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
213 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
214 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
215 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
216 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
217 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
218 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
219 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
220 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
221 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
222 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
223 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
224 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
225 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
226 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
227 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
228 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
229 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
230 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
231 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
232 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
233 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
234 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
235 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
236 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
237 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
238 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
239 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
240 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
241 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
242 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
243 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
244 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
245 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
246 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
247 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
248 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
249 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
250 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
251 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
252 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
253 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
254 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
255 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
256 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
257 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
258 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
259 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
260 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
261 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
262 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
263 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
264 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
265 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
266 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
267 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
268 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
269 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
270 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
271 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
272 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
273 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
274 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
275 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
276 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
277 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
278 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
279 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
280 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
281 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
282 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
283 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
284 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
285 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
286 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
287 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
288 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
289 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
290 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
291 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
292 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
293 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
294 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
295 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
296 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
297 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
298 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
299 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
300 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
301 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
302 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
303 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
304 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
305 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
306 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
307 SNMP_MIB_SENTINEL
308 };
309
icmpmsg_put_line(struct seq_file * seq,unsigned long * vals,unsigned short * type,int count)310 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
311 unsigned short *type, int count)
312 {
313 int j;
314
315 if (count) {
316 seq_puts(seq, "\nIcmpMsg:");
317 for (j = 0; j < count; ++j)
318 seq_printf(seq, " %sType%u",
319 type[j] & 0x100 ? "Out" : "In",
320 type[j] & 0xff);
321 seq_puts(seq, "\nIcmpMsg:");
322 for (j = 0; j < count; ++j)
323 seq_printf(seq, " %lu", vals[j]);
324 }
325 }
326
icmpmsg_put(struct seq_file * seq)327 static void icmpmsg_put(struct seq_file *seq)
328 {
329 #define PERLINE 16
330
331 int i, count;
332 unsigned short type[PERLINE];
333 unsigned long vals[PERLINE], val;
334 struct net *net = seq->private;
335
336 count = 0;
337 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
338 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
339 if (val) {
340 type[count] = i;
341 vals[count++] = val;
342 }
343 if (count == PERLINE) {
344 icmpmsg_put_line(seq, vals, type, count);
345 count = 0;
346 }
347 }
348 icmpmsg_put_line(seq, vals, type, count);
349
350 #undef PERLINE
351 }
352
icmp_put(struct seq_file * seq)353 static void icmp_put(struct seq_file *seq)
354 {
355 int i;
356 struct net *net = seq->private;
357 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
358
359 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
360 for (i = 0; icmpmibmap[i].name != NULL; i++)
361 seq_printf(seq, " In%s", icmpmibmap[i].name);
362 seq_puts(seq, " OutMsgs OutErrors");
363 for (i = 0; icmpmibmap[i].name != NULL; i++)
364 seq_printf(seq, " Out%s", icmpmibmap[i].name);
365 seq_printf(seq, "\nIcmp: %lu %lu %lu",
366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
369 for (i = 0; icmpmibmap[i].name != NULL; i++)
370 seq_printf(seq, " %lu",
371 atomic_long_read(ptr + icmpmibmap[i].index));
372 seq_printf(seq, " %lu %lu",
373 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
374 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
375 for (i = 0; icmpmibmap[i].name != NULL; i++)
376 seq_printf(seq, " %lu",
377 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
378 }
379
380 /*
381 * Called from the PROCfs module. This outputs /proc/net/snmp.
382 */
snmp_seq_show(struct seq_file * seq,void * v)383 static int snmp_seq_show(struct seq_file *seq, void *v)
384 {
385 int i;
386 struct net *net = seq->private;
387
388 seq_puts(seq, "Ip: Forwarding DefaultTTL");
389
390 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
391 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
392
393 seq_printf(seq, "\nIp: %d %d",
394 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
395 sysctl_ip_default_ttl);
396
397 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
398 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
399 seq_printf(seq, " %llu",
400 snmp_fold_field64(net->mib.ip_statistics,
401 snmp4_ipstats_list[i].entry,
402 offsetof(struct ipstats_mib, syncp)));
403
404 icmp_put(seq); /* RFC 2011 compatibility */
405 icmpmsg_put(seq);
406
407 seq_puts(seq, "\nTcp:");
408 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
409 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
410
411 seq_puts(seq, "\nTcp:");
412 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
413 /* MaxConn field is signed, RFC 2012 */
414 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
415 seq_printf(seq, " %ld",
416 snmp_fold_field(net->mib.tcp_statistics,
417 snmp4_tcp_list[i].entry));
418 else
419 seq_printf(seq, " %lu",
420 snmp_fold_field(net->mib.tcp_statistics,
421 snmp4_tcp_list[i].entry));
422 }
423
424 seq_puts(seq, "\nUdp:");
425 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
426 seq_printf(seq, " %s", snmp4_udp_list[i].name);
427
428 seq_puts(seq, "\nUdp:");
429 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
430 seq_printf(seq, " %lu",
431 snmp_fold_field(net->mib.udp_statistics,
432 snmp4_udp_list[i].entry));
433
434 /* the UDP and UDP-Lite MIBs are the same */
435 seq_puts(seq, "\nUdpLite:");
436 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
437 seq_printf(seq, " %s", snmp4_udp_list[i].name);
438
439 seq_puts(seq, "\nUdpLite:");
440 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
441 seq_printf(seq, " %lu",
442 snmp_fold_field(net->mib.udplite_statistics,
443 snmp4_udp_list[i].entry));
444
445 seq_putc(seq, '\n');
446 return 0;
447 }
448
snmp_seq_open(struct inode * inode,struct file * file)449 static int snmp_seq_open(struct inode *inode, struct file *file)
450 {
451 return single_open_net(inode, file, snmp_seq_show);
452 }
453
454 static const struct file_operations snmp_seq_fops = {
455 .owner = THIS_MODULE,
456 .open = snmp_seq_open,
457 .read = seq_read,
458 .llseek = seq_lseek,
459 .release = single_release_net,
460 };
461
462
463
464 /*
465 * Output /proc/net/netstat
466 */
netstat_seq_show(struct seq_file * seq,void * v)467 static int netstat_seq_show(struct seq_file *seq, void *v)
468 {
469 int i;
470 struct net *net = seq->private;
471
472 seq_puts(seq, "TcpExt:");
473 for (i = 0; snmp4_net_list[i].name != NULL; i++)
474 seq_printf(seq, " %s", snmp4_net_list[i].name);
475
476 seq_puts(seq, "\nTcpExt:");
477 for (i = 0; snmp4_net_list[i].name != NULL; i++)
478 seq_printf(seq, " %lu",
479 snmp_fold_field(net->mib.net_statistics,
480 snmp4_net_list[i].entry));
481
482 seq_puts(seq, "\nIpExt:");
483 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
484 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
485
486 seq_puts(seq, "\nIpExt:");
487 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
488 seq_printf(seq, " %llu",
489 snmp_fold_field64(net->mib.ip_statistics,
490 snmp4_ipextstats_list[i].entry,
491 offsetof(struct ipstats_mib, syncp)));
492
493 seq_putc(seq, '\n');
494 return 0;
495 }
496
netstat_seq_open(struct inode * inode,struct file * file)497 static int netstat_seq_open(struct inode *inode, struct file *file)
498 {
499 return single_open_net(inode, file, netstat_seq_show);
500 }
501
502 static const struct file_operations netstat_seq_fops = {
503 .owner = THIS_MODULE,
504 .open = netstat_seq_open,
505 .read = seq_read,
506 .llseek = seq_lseek,
507 .release = single_release_net,
508 };
509
ip_proc_init_net(struct net * net)510 static __net_init int ip_proc_init_net(struct net *net)
511 {
512 if (!proc_create("sockstat", S_IRUGO, net->proc_net,
513 &sockstat_seq_fops))
514 goto out_sockstat;
515 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
516 goto out_netstat;
517 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
518 goto out_snmp;
519
520 return 0;
521
522 out_snmp:
523 remove_proc_entry("netstat", net->proc_net);
524 out_netstat:
525 remove_proc_entry("sockstat", net->proc_net);
526 out_sockstat:
527 return -ENOMEM;
528 }
529
ip_proc_exit_net(struct net * net)530 static __net_exit void ip_proc_exit_net(struct net *net)
531 {
532 remove_proc_entry("snmp", net->proc_net);
533 remove_proc_entry("netstat", net->proc_net);
534 remove_proc_entry("sockstat", net->proc_net);
535 }
536
537 static __net_initdata struct pernet_operations ip_proc_ops = {
538 .init = ip_proc_init_net,
539 .exit = ip_proc_exit_net,
540 };
541
ip_misc_proc_init(void)542 int __init ip_misc_proc_init(void)
543 {
544 return register_pernet_subsys(&ip_proc_ops);
545 }
546
547