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Merge tag 'for-linus-20170904' of git://git.infradead.org/linux-mtd
[linux-2.6-block.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 .owner = THIS_MODULE,
87 .open = sockstat_seq_open,
88 .read = seq_read,
89 .llseek = seq_lseek,
b6fcbdb4 90 .release = single_release_net,
1da177e4
LT		 91};
92
1da177e4 93/* snmp items */
9b5b5cff 94static const struct snmp_mib snmp4_ipstats_list[] = {
edf391ff 95 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
1da177e4
LT		 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),
edf391ff 102 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
1da177e4
LT		 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
1f07d03e 115/* Following items are displayed in /proc/net/netstat */
d831666e
MC		 116static 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),
edf391ff
NH		 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),
1f07d03e 129 /* Non RFC4293 fields */
6a5dc9e5 130 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
1f07d03e
ED		 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),
d831666e
MC		 135 SNMP_MIB_SENTINEL
136};
137
5833929c
AD		 138static const struct {
139 const char *name;
96793b48
DS		 140 int index;
141} icmpmibmap[] = {
142 { "DestUnreachs", ICMP_DEST_UNREACH },
143 { "TimeExcds", ICMP_TIME_EXCEEDED },
144 { "ParmProbs", ICMP_PARAMETERPROB },
145 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
146 { "Redirects", ICMP_REDIRECT },
147 { "Echos", ICMP_ECHO },
148 { "EchoReps", ICMP_ECHOREPLY },
149 { "Timestamps", ICMP_TIMESTAMP },
150 { "TimestampReps", ICMP_TIMESTAMPREPLY },
151 { "AddrMasks", ICMP_ADDRESS },
152 { "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc 153 { NULL, 0 }
96793b48
DS		 154};
155
156
9b5b5cff 157static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4
LT		 158 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
159 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
160 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
161 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
162 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
163 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
164 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
165 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
166 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
167 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
168 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
169 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
170 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
171 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
6a5dc9e5 172 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
1da177e4
LT		 173 SNMP_MIB_SENTINEL
174};
175
9b5b5cff 176static const struct snmp_mib snmp4_udp_list[] = {
1da177e4
LT		 177 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
178 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
179 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
180 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c
MB		 181 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
182 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 183 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
36cbb245 184 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
1da177e4
LT		 185 SNMP_MIB_SENTINEL
186};
187
9b5b5cff 188static const struct snmp_mib snmp4_net_list[] = {
1da177e4
LT		 189 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
190 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
191 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
192 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
193 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
194 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
195 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
196 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
197 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
198 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
199 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
200 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
201 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
1da177e4
LT		 202 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
203 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
204 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
205 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
206 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
207 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
208 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
31770e34 209 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
1da177e4 210 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
31770e34 211 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
1da177e4
LT		 212 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
213 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
214 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
215 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
216 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
217 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
218 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
219 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
220 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
221 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
222 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
1da177e4
LT		 223 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
224 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
225 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
226 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
227 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
1da177e4
LT		 228 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
229 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
6ba8a3b1 230 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
9b717a8d 231 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
1da177e4
LT		 232 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
233 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
1da177e4
LT		 234 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
235 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
236 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
237 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
238 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
1da177e4
LT		 239 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
240 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
241 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
242 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
243 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
244 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
245 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
06044751 246 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
18f02545
IJ		 247 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
248 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
249 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b 250 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3
DM		 251 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
252 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
72145a68 253 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
111cc8b9
IJ		 254 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
255 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
256 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8 257 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
8fe809a9 258 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
6cce09f8 259 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5 260 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755 261 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510 262 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc
ED		 263 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
264 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
09e9b813 265 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
c8628155 266 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
a6df1ae9
ED		 267 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
268 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
269 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
282f23c6 270 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
0c24604b 271 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
783237e8 272 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
f19c29e3 273 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
10467163
JC		 274 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
275 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
276 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
277 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
46c2fa39 278 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
0e280af0 279 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
288a9376 280 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
f54b3111 281 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
8e165e20
FW		 282 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
283 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
284 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
f19c29e3
YC		 285 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
286 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
6e3a8a93
ED		 287 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
288 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
289 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
290 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
032ee423
NC		 291 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
292 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
293 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
294 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
295 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
296 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
e520af48
ED		 297 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
298 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
b56ea298
RJ		 299 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
300 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
1da177e4
LT		 301 SNMP_MIB_SENTINEL
302};
303
b971e7ac
ED		 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) {
c9f503b0 310 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 311 for (j = 0; j < count; ++j)
312 seq_printf(seq, " %sType%u",
313 type[j] & 0x100 ? "Out" : "In",
314 type[j] & 0xff);
c9f503b0 315 seq_puts(seq, "\nIcmpMsg:");
b971e7ac
ED		 316 for (j = 0; j < count; ++j)
317 seq_printf(seq, " %lu", vals[j]);
318 }
319}
320
96793b48
DS		 321static void icmpmsg_put(struct seq_file *seq)
322{
323#define PERLINE 16
324
b971e7ac
ED		 325 int i, count;
326 unsigned short type[PERLINE];
327 unsigned long vals[PERLINE], val;
229bf0cb 328 struct net *net = seq->private;
96793b48
DS		 329
330 count = 0;
331 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3 332 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac
ED		 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 }
96793b48 341 }
b971e7ac 342 icmpmsg_put_line(seq, vals, type, count);
96793b48
DS		 343
344#undef PERLINE
345}
346
347static void icmp_put(struct seq_file *seq)
348{
349 int i;
229bf0cb 350 struct net *net = seq->private;
acb32ba3 351 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48 352
6a5dc9e5 353 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
6d4a741c 354 for (i = 0; icmpmibmap[i].name; i++)
96793b48 355 seq_printf(seq, " In%s", icmpmibmap[i].name);
c9f503b0 356 seq_puts(seq, " OutMsgs OutErrors");
6d4a741c 357 for (i = 0; icmpmibmap[i].name; i++)
96793b48 358 seq_printf(seq, " Out%s", icmpmibmap[i].name);
6a5dc9e5 359 seq_printf(seq, "\nIcmp: %lu %lu %lu",
698365fa
WC		 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));
6d4a741c 363 for (i = 0; icmpmibmap[i].name; i++)
96793b48 364 seq_printf(seq, " %lu",
acb32ba3 365 atomic_long_read(ptr + icmpmibmap[i].index));
96793b48 366 seq_printf(seq, " %lu %lu",
698365fa
WC		 367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
6d4a741c 369 for (i = 0; icmpmibmap[i].name; i++)
96793b48 370 seq_printf(seq, " %lu",
acb32ba3 371 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
96793b48
DS		 372}
373
1da177e4
LT		 374/*
375 * Called from the PROCfs module. This outputs /proc/net/snmp.
376 */
f22d5c49 377static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
1da177e4 378{
229bf0cb 379 struct net *net = seq->private;
f22d5c49
JH		 380 u64 buff64[IPSTATS_MIB_MAX];
381 int i;
1da177e4 382
f22d5c49 383 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
1da177e4 384
f22d5c49 385 seq_puts(seq, "Ip: Forwarding DefaultTTL");
6d4a741c 386 for (i = 0; snmp4_ipstats_list[i].name; i++)
1da177e4
LT		 387 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
388
389 seq_printf(seq, "\nIp: %d %d",
8e3461d0 390 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
fa50d974 391 net->ipv4.sysctl_ip_default_ttl);
1da177e4 392
4ce3c183 393 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
f22d5c49
JH		 394 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
395 net->mib.ip_statistics,
396 offsetof(struct ipstats_mib, syncp));
6d4a741c 397 for (i = 0; snmp4_ipstats_list[i].name; i++)
f22d5c49 398 seq_printf(seq, " %llu", buff64[i]);
1da177e4 399
f22d5c49
JH		 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));
1da177e4
LT		 410
411 seq_puts(seq, "\nTcp:");
6d4a741c 412 for (i = 0; snmp4_tcp_list[i].name; i++)
1da177e4
LT		 413 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
414
415 seq_puts(seq, "\nTcp:");
f22d5c49
JH		 416 snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
417 net->mib.tcp_statistics);
6d4a741c 418 for (i = 0; snmp4_tcp_list[i].name; i++) {
1da177e4
LT		 419 /* MaxConn field is signed, RFC 2012 */
420 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
f22d5c49 421 seq_printf(seq, " %ld", buff[i]);
1da177e4 422 else
f22d5c49 423 seq_printf(seq, " %lu", buff[i]);
1da177e4
LT		 424 }
425
f22d5c49
JH		 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);
1da177e4 430 seq_puts(seq, "\nUdp:");
6d4a741c 431 for (i = 0; snmp4_udp_list[i].name; i++)
1da177e4 432 seq_printf(seq, " %s", snmp4_udp_list[i].name);
1da177e4 433 seq_puts(seq, "\nUdp:");
6d4a741c 434 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49
JH		 435 seq_printf(seq, " %lu", buff[i]);
436
437 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
1da177e4 438
ba4e58ec
GR		 439 /* the UDP and UDP-Lite MIBs are the same */
440 seq_puts(seq, "\nUdpLite:");
f22d5c49
JH		 441 snmp_get_cpu_field_batch(buff, snmp4_udp_list,
442 net->mib.udplite_statistics);
6d4a741c 443 for (i = 0; snmp4_udp_list[i].name; i++)
ba4e58ec 444 seq_printf(seq, " %s", snmp4_udp_list[i].name);
ba4e58ec 445 seq_puts(seq, "\nUdpLite:");
6d4a741c 446 for (i = 0; snmp4_udp_list[i].name; i++)
f22d5c49 447 seq_printf(seq, " %lu", buff[i]);
db8dac20 448
1da177e4
LT		 449 seq_putc(seq, '\n');
450 return 0;
451}
452
f22d5c49
JH		 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
1da177e4
LT		 465static int snmp_seq_open(struct inode *inode, struct file *file)
466{
de05c557 467 return single_open_net(inode, file, snmp_seq_show);
229bf0cb
PE		 468}
469
9a32144e 470static const struct file_operations snmp_seq_fops = {
1da177e4
LT		 471 .owner = THIS_MODULE,
472 .open = snmp_seq_open,
473 .read = seq_read,
474 .llseek = seq_lseek,
b6fcbdb4 475 .release = single_release_net,
1da177e4
LT		 476};
477
96793b48
DS		 478
479
1da177e4
LT		 480/*
481 * Output /proc/net/netstat
482 */
483static int netstat_seq_show(struct seq_file *seq, void *v)
484{
485 int i;
7b7a9dfd 486 struct net *net = seq->private;
1da177e4
LT		 487
488 seq_puts(seq, "TcpExt:");
6d4a741c 489 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4
LT		 490 seq_printf(seq, " %s", snmp4_net_list[i].name);
491
492 seq_puts(seq, "\nTcpExt:");
6d4a741c 493 for (i = 0; snmp4_net_list[i].name; i++)
1da177e4 494 seq_printf(seq, " %lu",
698365fa 495 snmp_fold_field(net->mib.net_statistics,
5e0f0435 496 snmp4_net_list[i].entry));
1da177e4 497
d831666e 498 seq_puts(seq, "\nIpExt:");
6d4a741c 499 for (i = 0; snmp4_ipextstats_list[i].name; i++)
d831666e
MC		 500 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
501
502 seq_puts(seq, "\nIpExt:");
6d4a741c 503 for (i = 0; snmp4_ipextstats_list[i].name; i++)
4ce3c183 504 seq_printf(seq, " %llu",
698365fa 505 snmp_fold_field64(net->mib.ip_statistics,
4ce3c183
ED		 506 snmp4_ipextstats_list[i].entry,
507 offsetof(struct ipstats_mib, syncp)));
d831666e 508
1da177e4
LT		 509 seq_putc(seq, '\n');
510 return 0;
511}
512
513static int netstat_seq_open(struct inode *inode, struct file *file)
514{
de05c557 515 return single_open_net(inode, file, netstat_seq_show);
7b7a9dfd
PE		 516}
517
9a32144e 518static const struct file_operations netstat_seq_fops = {
1da177e4
LT		 519 .owner = THIS_MODULE,
520 .open = netstat_seq_open,
521 .read = seq_read,
522 .llseek = seq_lseek,
b6fcbdb4 523 .release = single_release_net,
1da177e4
LT		 524};
525
d0538ca3
PE		 526static __net_init int ip_proc_init_net(struct net *net)
527{
d4beaa66
G		 528 if (!proc_create("sockstat", S_IRUGO, net->proc_net,
529 &sockstat_seq_fops))
60bdde95 530 goto out_sockstat;
d4beaa66 531 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
7b7a9dfd 532 goto out_netstat;
d4beaa66 533 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
229bf0cb 534 goto out_snmp;
7b7a9dfd 535
d0538ca3 536 return 0;
7b7a9dfd 537
229bf0cb 538out_snmp:
ece31ffd 539 remove_proc_entry("netstat", net->proc_net);
7b7a9dfd 540out_netstat:
ece31ffd 541 remove_proc_entry("sockstat", net->proc_net);
60bdde95 542out_sockstat:
7b7a9dfd 543 return -ENOMEM;
d0538ca3
PE		 544}
545
546static __net_exit void ip_proc_exit_net(struct net *net)
547{
ece31ffd
G		 548 remove_proc_entry("snmp", net->proc_net);
549 remove_proc_entry("netstat", net->proc_net);
550 remove_proc_entry("sockstat", net->proc_net);
d0538ca3
PE		 551}
552
553static __net_initdata struct pernet_operations ip_proc_ops = {
554 .init = ip_proc_init_net,
555 .exit = ip_proc_exit_net,
556};
557
1da177e4
LT		 558int __init ip_misc_proc_init(void)
559{
60bdde95 560 return register_pernet_subsys(&ip_proc_ops);
1da177e4 561}
33490170 562
Linux 6.x block layer and io_uring tree(s)