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net: net_cls: fd passed in SCM_RIGHTS datagram not set correctly
[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
1da177e4
LT		 49/*
50 * Report socket allocation statistics [mea@utu.fi]
51 */
52static int sockstat_seq_show(struct seq_file *seq, void *v)
53{
fd4e7b50 54 struct net *net = seq->private;
eb4dea58
HX		 55 int orphans, sockets;
56
57 local_bh_disable();
1c10c49d 58 orphans = percpu_counter_sum_positive(&tcp_orphan_count);
180d8cd9 59 sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
eb4dea58 60 local_bh_enable();
fd4e7b50 61
1da177e4 62 socket_seq_show(seq);
8d987e5c 63 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
eb4dea58
HX		 64 sock_prot_inuse_get(net, &tcp_prot), orphans,
65 tcp_death_row.tw_count, sockets,
180d8cd9 66 proto_memory_allocated(&tcp_prot));
8d987e5c 67 seq_printf(seq, "UDP: inuse %d mem %ld\n",
fd4e7b50 68 sock_prot_inuse_get(net, &udp_prot),
180d8cd9 69 proto_memory_allocated(&udp_prot));
c29a0bc4 70 seq_printf(seq, "UDPLITE: inuse %d\n",
fd4e7b50 71 sock_prot_inuse_get(net, &udplite_prot));
c29a0bc4 72 seq_printf(seq, "RAW: inuse %d\n",
fd4e7b50 73 sock_prot_inuse_get(net, &raw_prot));
7eb95156 74 seq_printf(seq, "FRAG: inuse %d memory %d\n",
fd4e7b50 75 ip_frag_nqueues(net), ip_frag_mem(net));
1da177e4
LT		 76 return 0;
77}
78
79static int sockstat_seq_open(struct inode *inode, struct file *file)
80{
de05c557 81 return single_open_net(inode, file, sockstat_seq_show);
fd4e7b50
PE		 82}
83
9a32144e 84static const struct file_operations sockstat_seq_fops = {
1da177e4
LT		 85 .owner = THIS_MODULE,
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
d831666e
MC		 114/* Following RFC4293 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),
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),
d831666e
MC		 128 SNMP_MIB_SENTINEL
129};
130
5833929c
AD		 131static const struct {
132 const char *name;
96793b48
DS		 133 int index;
134} icmpmibmap[] = {
135 { "DestUnreachs", ICMP_DEST_UNREACH },
136 { "TimeExcds", ICMP_TIME_EXCEEDED },
137 { "ParmProbs", ICMP_PARAMETERPROB },
138 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
139 { "Redirects", ICMP_REDIRECT },
140 { "Echos", ICMP_ECHO },
141 { "EchoReps", ICMP_ECHOREPLY },
142 { "Timestamps", ICMP_TIMESTAMP },
143 { "TimestampReps", ICMP_TIMESTAMPREPLY },
144 { "AddrMasks", ICMP_ADDRESS },
145 { "AddrMaskReps", ICMP_ADDRESSREPLY },
cfcabdcc 146 { NULL, 0 }
96793b48
DS		 147};
148
149
9b5b5cff 150static const struct snmp_mib snmp4_tcp_list[] = {
1da177e4
LT		 151 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
152 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
153 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
154 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
155 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
156 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
157 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
158 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
159 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
160 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
161 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
162 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
163 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
164 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
165 SNMP_MIB_SENTINEL
166};
167
9b5b5cff 168static const struct snmp_mib snmp4_udp_list[] = {
1da177e4
LT		 169 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
170 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
171 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
172 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
81aa646c
MB		 173 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
174 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
1da177e4
LT		 175 SNMP_MIB_SENTINEL
176};
177
9b5b5cff 178static const struct snmp_mib snmp4_net_list[] = {
1da177e4
LT		 179 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
180 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
181 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
182 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
183 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
184 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
185 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
186 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
187 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
188 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
189 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
190 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
191 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
192 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
193 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
194 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
195 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
196 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
197 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
198 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
199 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
200 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
201 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
202 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
203 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
204 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
205 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
206 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
207 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
208 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
209 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
210 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
211 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
212 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
213 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
214 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
215 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
216 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
217 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
218 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
1da177e4
LT		 219 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
220 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
221 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
222 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
223 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
224 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
225 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
226 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
227 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
228 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
229 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
230 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
231 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
232 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
233 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
234 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
1da177e4
LT		 235 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
236 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
237 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
238 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
239 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
240 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
241 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
18f02545
IJ		 242 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
243 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
244 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
912d8f0b 245 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
785957d3
DM		 246 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
247 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
111cc8b9
IJ		 248 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
249 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
250 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
6cce09f8
ED		 251 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
252 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
907cdda5 253 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
b5f7e755 254 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
67631510 255 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
946cedcc
ED		 256 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
257 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
09e9b813 258 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
c8628155 259 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
a6df1ae9
ED		 260 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
261 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
262 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
282f23c6 263 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
0c24604b 264 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
783237e8 265 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
10467163
JC		 266 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
267 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
268 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
269 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
1da177e4
LT		 270 SNMP_MIB_SENTINEL
271};
272
b971e7ac
ED		 273static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
274 unsigned short *type, int count)
275{
276 int j;
277
278 if (count) {
279 seq_printf(seq, "\nIcmpMsg:");
280 for (j = 0; j < count; ++j)
281 seq_printf(seq, " %sType%u",
282 type[j] & 0x100 ? "Out" : "In",
283 type[j] & 0xff);
284 seq_printf(seq, "\nIcmpMsg:");
285 for (j = 0; j < count; ++j)
286 seq_printf(seq, " %lu", vals[j]);
287 }
288}
289
96793b48
DS		 290static void icmpmsg_put(struct seq_file *seq)
291{
292#define PERLINE 16
293
b971e7ac
ED		 294 int i, count;
295 unsigned short type[PERLINE];
296 unsigned long vals[PERLINE], val;
229bf0cb 297 struct net *net = seq->private;
96793b48
DS		 298
299 count = 0;
300 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
acb32ba3 301 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
b971e7ac
ED		 302 if (val) {
303 type[count] = i;
304 vals[count++] = val;
305 }
306 if (count == PERLINE) {
307 icmpmsg_put_line(seq, vals, type, count);
308 count = 0;
309 }
96793b48 310 }
b971e7ac 311 icmpmsg_put_line(seq, vals, type, count);
96793b48
DS		 312
313#undef PERLINE
314}
315
316static void icmp_put(struct seq_file *seq)
317{
318 int i;
229bf0cb 319 struct net *net = seq->private;
acb32ba3 320 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
96793b48
DS		 321
322 seq_puts(seq, "\nIcmp: InMsgs InErrors");
323 for (i=0; icmpmibmap[i].name != NULL; i++)
324 seq_printf(seq, " In%s", icmpmibmap[i].name);
325 seq_printf(seq, " OutMsgs OutErrors");
326 for (i=0; icmpmibmap[i].name != NULL; i++)
327 seq_printf(seq, " Out%s", icmpmibmap[i].name);
328 seq_printf(seq, "\nIcmp: %lu %lu",
7d720c3e
TH		 329 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
330 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
96793b48
DS		 331 for (i=0; icmpmibmap[i].name != NULL; i++)
332 seq_printf(seq, " %lu",
acb32ba3 333 atomic_long_read(ptr + icmpmibmap[i].index));
96793b48 334 seq_printf(seq, " %lu %lu",
7d720c3e
TH		 335 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
336 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
96793b48
DS		 337 for (i=0; icmpmibmap[i].name != NULL; i++)
338 seq_printf(seq, " %lu",
acb32ba3 339 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
96793b48
DS		 340}
341
1da177e4
LT		 342/*
343 * Called from the PROCfs module. This outputs /proc/net/snmp.
344 */
345static int snmp_seq_show(struct seq_file *seq, void *v)
346{
347 int i;
229bf0cb 348 struct net *net = seq->private;
1da177e4
LT		 349
350 seq_puts(seq, "Ip: Forwarding DefaultTTL");
351
352 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
353 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
354
355 seq_printf(seq, "\nIp: %d %d",
8e3461d0 356 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
586f1211 357 sysctl_ip_default_ttl);
1da177e4 358
4ce3c183 359 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
1da177e4 360 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
4ce3c183
ED		 361 seq_printf(seq, " %llu",
362 snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
363 snmp4_ipstats_list[i].entry,
364 offsetof(struct ipstats_mib, syncp)));
1da177e4 365
96793b48
DS		 366 icmp_put(seq); /* RFC 2011 compatibility */
367 icmpmsg_put(seq);
1da177e4
LT		 368
369 seq_puts(seq, "\nTcp:");
370 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
371 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
372
373 seq_puts(seq, "\nTcp:");
374 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
375 /* MaxConn field is signed, RFC 2012 */
376 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
377 seq_printf(seq, " %ld",
7d720c3e 378 snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
5e0f0435 379 snmp4_tcp_list[i].entry));
1da177e4
LT		 380 else
381 seq_printf(seq, " %lu",
7d720c3e 382 snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
5e0f0435 383 snmp4_tcp_list[i].entry));
1da177e4
LT		 384 }
385
386 seq_puts(seq, "\nUdp:");
387 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
388 seq_printf(seq, " %s", snmp4_udp_list[i].name);
389
390 seq_puts(seq, "\nUdp:");
391 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
392 seq_printf(seq, " %lu",
7d720c3e 393 snmp_fold_field((void __percpu **)net->mib.udp_statistics,
5e0f0435 394 snmp4_udp_list[i].entry));
1da177e4 395
ba4e58ec
GR		 396 /* the UDP and UDP-Lite MIBs are the same */
397 seq_puts(seq, "\nUdpLite:");
398 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
399 seq_printf(seq, " %s", snmp4_udp_list[i].name);
400
401 seq_puts(seq, "\nUdpLite:");
402 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
403 seq_printf(seq, " %lu",
7d720c3e 404 snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
5e0f0435 405 snmp4_udp_list[i].entry));
db8dac20 406
1da177e4
LT		 407 seq_putc(seq, '\n');
408 return 0;
409}
410
411static int snmp_seq_open(struct inode *inode, struct file *file)
412{
de05c557 413 return single_open_net(inode, file, snmp_seq_show);
229bf0cb
PE		 414}
415
9a32144e 416static const struct file_operations snmp_seq_fops = {
1da177e4
LT		 417 .owner = THIS_MODULE,
418 .open = snmp_seq_open,
419 .read = seq_read,
420 .llseek = seq_lseek,
b6fcbdb4 421 .release = single_release_net,
1da177e4
LT		 422};
423
96793b48
DS		 424
425
1da177e4
LT		 426/*
427 * Output /proc/net/netstat
428 */
429static int netstat_seq_show(struct seq_file *seq, void *v)
430{
431 int i;
7b7a9dfd 432 struct net *net = seq->private;
1da177e4
LT		 433
434 seq_puts(seq, "TcpExt:");
435 for (i = 0; snmp4_net_list[i].name != NULL; i++)
436 seq_printf(seq, " %s", snmp4_net_list[i].name);
437
438 seq_puts(seq, "\nTcpExt:");
439 for (i = 0; snmp4_net_list[i].name != NULL; i++)
440 seq_printf(seq, " %lu",
7d720c3e 441 snmp_fold_field((void __percpu **)net->mib.net_statistics,
5e0f0435 442 snmp4_net_list[i].entry));
1da177e4 443
d831666e
MC		 444 seq_puts(seq, "\nIpExt:");
445 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
446 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
447
448 seq_puts(seq, "\nIpExt:");
449 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
4ce3c183
ED		 450 seq_printf(seq, " %llu",
451 snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
452 snmp4_ipextstats_list[i].entry,
453 offsetof(struct ipstats_mib, syncp)));
d831666e 454
1da177e4
LT		 455 seq_putc(seq, '\n');
456 return 0;
457}
458
459static int netstat_seq_open(struct inode *inode, struct file *file)
460{
de05c557 461 return single_open_net(inode, file, netstat_seq_show);
7b7a9dfd
PE		 462}
463
9a32144e 464static const struct file_operations netstat_seq_fops = {
1da177e4
LT		 465 .owner = THIS_MODULE,
466 .open = netstat_seq_open,
467 .read = seq_read,
468 .llseek = seq_lseek,
b6fcbdb4 469 .release = single_release_net,
1da177e4
LT		 470};
471
d0538ca3
PE		 472static __net_init int ip_proc_init_net(struct net *net)
473{
474 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
60bdde95 475 goto out_sockstat;
7b7a9dfd
PE		 476 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
477 goto out_netstat;
229bf0cb
PE		 478 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
479 goto out_snmp;
7b7a9dfd 480
d0538ca3 481 return 0;
7b7a9dfd 482
229bf0cb
PE		 483out_snmp:
484 proc_net_remove(net, "netstat");
7b7a9dfd
PE		 485out_netstat:
486 proc_net_remove(net, "sockstat");
60bdde95 487out_sockstat:
7b7a9dfd 488 return -ENOMEM;
d0538ca3
PE		 489}
490
491static __net_exit void ip_proc_exit_net(struct net *net)
492{
229bf0cb 493 proc_net_remove(net, "snmp");
7b7a9dfd 494 proc_net_remove(net, "netstat");
d0538ca3
PE		 495 proc_net_remove(net, "sockstat");
496}
497
498static __net_initdata struct pernet_operations ip_proc_ops = {
499 .init = ip_proc_init_net,
500 .exit = ip_proc_exit_net,
501};
502
1da177e4
LT		 503int __init ip_misc_proc_init(void)
504{
60bdde95 505 return register_pernet_subsys(&ip_proc_ops);
1da177e4 506}
33490170 507
Linux 6.x block layer and io_uring tree(s)