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Merge tag 'mips_fixes_4.16_1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan...
[mirror_ubuntu-eoan-kernel.git] / net / ipv4 / proc.c
CommitLineData
1da177e4
LT		 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 *
1da177e4
LT		 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>
457c4cbc 35#include <net/net_namespace.h>
1da177e4
LT		 36#include <net/icmp.h>
37#include <net/protocol.h>
38#include <net/tcp.h>
39#include <net/udp.h>
ba4e58ec 40#include <net/udplite.h>
eb4dea58 41#include <linux/bottom_half.h>
14c85021 42#include <linux/inetdevice.h>
1da177e4
LT		 43#include <linux/proc_fs.h>
44#include <linux/seq_file.h>
bc3b2d7f 45#include <linux/export.h>
1da177e4
LT		 46#include <net/sock.h>
47#include <net/raw.h>
48
f22d5c49
JH		 49#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
50
1da177e4
LT		 51/*
52 * Report socket allocation statistics [mea@utu.fi]
53 */
54static int sockstat_seq_show(struct seq_file *seq, void *v)
55{
fd4e7b50 56 struct net *net = seq->private;
434d3054 57 unsigned int frag_mem;
eb4dea58
HX		 58 int orphans, sockets;
59
1c10c49d 60 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
180d8cd9 61 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
fd4e7b50 62
1da177e4 63 socket_seq_show(seq);
8d987e5c 64 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
eb4dea58 65 sock_prot_inuse_get(net, &tcp_prot), orphans,
1946e672 66 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
180d8cd9 67 proto_memory_allocated(&tcp_prot));
8d987e5c 68 seq_printf(seq, "UDP: inuse %d mem %ld\n",
fd4e7b50 69 sock_prot_inuse_get(net, &udp_prot),
180d8cd9 70 proto_memory_allocated(&udp_prot));
c29a0bc4 71 seq_printf(seq, "UDPLITE: inuse %d\n",
fd4e7b50 72 sock_prot_inuse_get(net, &udplite_prot));
c29a0bc4 73 seq_printf(seq, "RAW: inuse %d\n",
fd4e7b50 74 sock_prot_inuse_get(net, &raw_prot));
434d3054
FW		 75 frag_mem = ip_frag_mem(net);
76 seq_printf(seq, "FRAG: inuse %u memory %u\n", !!frag_mem, frag_mem);
1da177e4
LT		 77 return 0;
78}
79
80static int sockstat_seq_open(struct inode *inode, struct file *file)
81{
de05c557 82 return single_open_net(inode, file, sockstat_seq_show);
fd4e7b50
PE		 83}
84
9a32144e 85static const struct file_operations sockstat_seq_fops = {
1da177e4
LT		 86 .open = sockstat_seq_open,
87 .read = seq_read,
88 .llseek = seq_lseek,
b6fcbdb4 89 .release = single_release_net,
1da177e4
LT		 90};
91
1da177e4 92/* snmp items */
9b5b5cff 93static const struct snmp_mib snmp4_ipstats_list[] = {
edf391ff 94 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
1da177e4
LT		 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),
edf391ff 101 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
1da177e4
LT		 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
1f07d03e 114/* Following items are displayed in /proc/net/netstat */
d831666e
MC		 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),
edf391ff
NH		 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),
1f07d03e 128 /* Non RFC4293 fields */
6a5dc9e5 129 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
1f07d03e
ED		 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),
d831666e
MC		 134 SNMP_MIB_SENTINEL
135};
136
5833929c
AD		 137static const struct {
138 const char *name;
96793b48
DS		 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 },
cfcabdcc 152 { NULL, 0 }
96793b48
DS		 153};
154
155
9b5b5cff 156static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4
LT		 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),
6a5dc9e5 171 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
1da177e4
LT		 172 SNMP_MIB_SENTINEL
173};
174
9b5b5cff 175static const struct snmp_mib snmp4_udp_list[] = {
1da177e4
LT		 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),
81aa646c
MB		 180 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
181 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 182 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
36cbb245 183 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
1da177e4
LT		 184 SNMP_MIB_SENTINEL
185};
186
9b5b5cff 187static const struct snmp_mib snmp4_net_list[] = {
1da177e4
LT		 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),
1da177e4
LT		 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),
31770e34 208 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
1da177e4 209 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
31770e34 210 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
1da177e4
LT		 211 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
212 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
213 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
1da177e4
LT		 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),
1da177e4
LT		 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),
1da177e4
LT		 226 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
227 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
6ba8a3b1 228 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
9b717a8d 229 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
1da177e4
LT		 230 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
231 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
1da177e4
LT		 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),
1da177e4
LT		 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),
06044751 244 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
18f02545
IJ		 245 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
246 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
247 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b 248 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3
DM		 249 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
250 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
72145a68 251 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
111cc8b9
IJ		 252 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
253 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
254 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8 255 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
8fe809a9 256 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
6cce09f8 257 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5 258 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755 259 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510 260 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc
ED		 261 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
262 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
09e9b813 263 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
c8628155 264 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
a6df1ae9
ED		 265 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
266 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
267 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
282f23c6 268 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
0c24604b 269 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
783237e8 270 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
f19c29e3 271 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
10467163
JC		 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),
46c2fa39 276 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
0e280af0 277 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
288a9376 278 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
f54b3111 279 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
8e165e20
FW		 280 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
281 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
282 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
f19c29e3
YC		 283 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
284 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
6e3a8a93
ED		 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),
032ee423
NC		 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),
e520af48
ED		 295 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
296 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
b56ea298
RJ		 297 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
298 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
1da177e4
LT		 299 SNMP_MIB_SENTINEL
300};
301
b971e7ac
ED		 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) {
c9f503b0 308 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 309 for (j = 0; j < count; ++j)
310 seq_printf(seq, " %sType%u",
311 type[j] & 0x100 ? "Out" : "In",
312 type[j] & 0xff);
c9f503b0 313 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 314 for (j = 0; j < count; ++j)
315 seq_printf(seq, " %lu", vals[j]);
316 }
317}
318
96793b48
DS		 319static void icmpmsg_put(struct seq_file *seq)
320{
321#define PERLINE 16
322
b971e7ac
ED		 323 int i, count;
324 unsigned short type[PERLINE];
325 unsigned long vals[PERLINE], val;
229bf0cb 326 struct net *net = seq->private;
96793b48
DS		 327
328 count = 0;
329 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3 330 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac
ED		 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 }
96793b48 339 }
b971e7ac 340 icmpmsg_put_line(seq, vals, type, count);
96793b48
DS		 341
342#undef PERLINE
343}
344
345static void icmp_put(struct seq_file *seq)
346{
347 int i;
229bf0cb 348 struct net *net = seq->private;
acb32ba3 349 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48 350
6a5dc9e5 351 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
6d4a741c 352 for (i = 0; icmpmibmap[i].name; i++)
96793b48 353 seq_printf(seq, " In%s", icmpmibmap[i].name);
c9f503b0 354 seq_puts(seq, " OutMsgs OutErrors");
6d4a741c 355 for (i = 0; icmpmibmap[i].name; i++)
96793b48 356 seq_printf(seq, " Out%s", icmpmibmap[i].name);
6a5dc9e5 357 seq_printf(seq, "\nIcmp: %lu %lu %lu",
698365fa
WC		 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));
6d4a741c 361 for (i = 0; icmpmibmap[i].name; i++)
96793b48 362 seq_printf(seq, " %lu",
acb32ba3 363 atomic_long_read(ptr + icmpmibmap[i].index));
96793b48 364 seq_printf(seq, " %lu %lu",
698365fa
WC		 365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
6d4a741c 367 for (i = 0; icmpmibmap[i].name; i++)
96793b48 368 seq_printf(seq, " %lu",
acb32ba3 369 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
96793b48
DS		 370}
371
1da177e4
LT		 372/*
373 * Called from the PROCfs module. This outputs /proc/net/snmp.
374 */
f22d5c49 375static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
1da177e4 376{
229bf0cb 377 struct net *net = seq->private;
f22d5c49
JH		 378 u64 buff64[IPSTATS_MIB_MAX];
379 int i;
1da177e4 380
f22d5c49 381 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
1da177e4 382
f22d5c49 383 seq_puts(seq, "Ip: Forwarding DefaultTTL");
6d4a741c 384 for (i = 0; snmp4_ipstats_list[i].name; i++)
1da177e4
LT		 385 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
386
387 seq_printf(seq, "\nIp: %d %d",
8e3461d0 388 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
fa50d974 389 net->ipv4.sysctl_ip_default_ttl);
1da177e4 390
4ce3c183 391 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
f22d5c49
JH		 392 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
393 net->mib.ip_statistics,
394 offsetof(struct ipstats_mib, syncp));
6d4a741c 395 for (i = 0; snmp4_ipstats_list[i].name; i++)
f22d5c49 396 seq_printf(seq, " %llu", buff64[i]);
1da177e4 397
f22d5c49
JH		 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));
1da177e4
LT		 408
409 seq_puts(seq, "\nTcp:");
6d4a741c 410 for (i = 0; snmp4_tcp_list[i].name; i++)
1da177e4
LT		 411 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
412
413 seq_puts(seq, "\nTcp:");
f22d5c49
JH		 414 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
415 net->mib.tcp_statistics);
6d4a741c 416 for (i = 0; snmp4_tcp_list[i].name; i++) {
1da177e4
LT		 417 /* MaxConn field is signed, RFC 2012 */
418 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
f22d5c49 419 seq_printf(seq, " %ld", buff[i]);
1da177e4 420 else
f22d5c49 421 seq_printf(seq, " %lu", buff[i]);
1da177e4
LT		 422 }
423
f22d5c49
JH		 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);
1da177e4 428 seq_puts(seq, "\nUdp:");
6d4a741c 429 for (i = 0; snmp4_udp_list[i].name; i++)
1da177e4 430 seq_printf(seq, " %s", snmp4_udp_list[i].name);
1da177e4 431 seq_puts(seq, "\nUdp:");
6d4a741c 432 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49
JH		 433 seq_printf(seq, " %lu", buff[i]);
434
435 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4 436
ba4e58ec
GR		 437 /* the UDP and UDP-Lite MIBs are the same */
438 seq_puts(seq, "\nUdpLite:");
f22d5c49
JH		 439 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
440 net->mib.udplite_statistics);
6d4a741c 441 for (i = 0; snmp4_udp_list[i].name; i++)
ba4e58ec 442 seq_printf(seq, " %s", snmp4_udp_list[i].name);
ba4e58ec 443 seq_puts(seq, "\nUdpLite:");
6d4a741c 444 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49 445 seq_printf(seq, " %lu", buff[i]);
db8dac20 446
1da177e4
LT		 447 seq_putc(seq, '\n');
448 return 0;
449}
450
f22d5c49
JH		 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
1da177e4
LT		 463static int snmp_seq_open(struct inode *inode, struct file *file)
464{
de05c557 465 return single_open_net(inode, file, snmp_seq_show);
229bf0cb
PE		 466}
467
9a32144e 468static const struct file_operations snmp_seq_fops = {
1da177e4
LT		 469 .open = snmp_seq_open,
470 .read = seq_read,
471 .llseek = seq_lseek,
b6fcbdb4 472 .release = single_release_net,
1da177e4
LT		 473};
474
96793b48
DS		 475
476
1da177e4
LT		 477/*
478 * Output /proc/net/netstat
479 */
480static int netstat_seq_show(struct seq_file *seq, void *v)
481{
482 int i;
7b7a9dfd 483 struct net *net = seq->private;
1da177e4
LT		 484
485 seq_puts(seq, "TcpExt:");
6d4a741c 486 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4
LT		 487 seq_printf(seq, " %s", snmp4_net_list[i].name);
488
489 seq_puts(seq, "\nTcpExt:");
6d4a741c 490 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4 491 seq_printf(seq, " %lu",
698365fa 492 snmp_fold_field(net->mib.net_statistics,
5e0f0435 493 snmp4_net_list[i].entry));
1da177e4 494
d831666e 495 seq_puts(seq, "\nIpExt:");
6d4a741c 496 for (i = 0; snmp4_ipextstats_list[i].name; i++)
d831666e
MC		 497 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
498
499 seq_puts(seq, "\nIpExt:");
6d4a741c 500 for (i = 0; snmp4_ipextstats_list[i].name; i++)
4ce3c183 501 seq_printf(seq, " %llu",
698365fa 502 snmp_fold_field64(net->mib.ip_statistics,
4ce3c183
ED		 503 snmp4_ipextstats_list[i].entry,
504 offsetof(struct ipstats_mib, syncp)));
d831666e 505
1da177e4
LT		 506 seq_putc(seq, '\n');
507 return 0;
508}
509
510static int netstat_seq_open(struct inode *inode, struct file *file)
511{
de05c557 512 return single_open_net(inode, file, netstat_seq_show);
7b7a9dfd
PE		 513}
514
9a32144e 515static const struct file_operations netstat_seq_fops = {
1da177e4
LT		 516 .open = netstat_seq_open,
517 .read = seq_read,
518 .llseek = seq_lseek,
b6fcbdb4 519 .release = single_release_net,
1da177e4
LT		 520};
521
d0538ca3
PE		 522static __net_init int ip_proc_init_net(struct net *net)
523{
d4beaa66
G		 524 if (!proc_create("sockstat", S_IRUGO, net->proc_net,
525 &sockstat_seq_fops))
60bdde95 526 goto out_sockstat;
d4beaa66 527 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
7b7a9dfd 528 goto out_netstat;
d4beaa66 529 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
229bf0cb 530 goto out_snmp;
7b7a9dfd 531
d0538ca3 532 return 0;
7b7a9dfd 533
229bf0cb 534out_snmp:
ece31ffd 535 remove_proc_entry("netstat", net->proc_net);
7b7a9dfd 536out_netstat:
ece31ffd 537 remove_proc_entry("sockstat", net->proc_net);
60bdde95 538out_sockstat:
7b7a9dfd 539 return -ENOMEM;
d0538ca3
PE		 540}
541
542static __net_exit void ip_proc_exit_net(struct net *net)
543{
ece31ffd
G		 544 remove_proc_entry("snmp", net->proc_net);
545 remove_proc_entry("netstat", net->proc_net);
546 remove_proc_entry("sockstat", net->proc_net);
d0538ca3
PE		 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
1da177e4
LT		 554int __init ip_misc_proc_init(void)
555{
60bdde95 556 return register_pernet_subsys(&ip_proc_ops);
1da177e4 557}
33490170 558
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