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.
6 * This file implements the various access functions for the
7 * PROC file system. It is mainly used for debugging and
10 * Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
12 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
14 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
15 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
18 * Alan Cox : UDP sockets show the rxqueue/txqueue
19 * using hint flag for the netinfo.
20 * Pauline Middelink : identd support
21 * Alan Cox : Make /proc safer.
22 * Erik Schoenfelder : /proc/net/snmp
23 * Alan Cox : Handle dead sockets properly.
24 * Gerhard Koerting : Show both timers
25 * Alan Cox : Allow inode to be NULL (kernel socket)
26 * Andi Kleen : Add support for open_requests and
27 * split functions for more readibility.
28 * Andi Kleen : Add support for /proc/net/netstat
29 * Arnaldo C. Melo : Convert to seq_file
31 * This program is free software; you can redistribute it and/or
32 * modify it under the terms of the GNU General Public License
33 * as published by the Free Software Foundation; either version
34 * 2 of the License, or (at your option) any later version.
36 #include <linux/types.h>
37 #include <net/net_namespace.h>
39 #include <net/protocol.h>
42 #include <net/udplite.h>
43 #include <linux/inetdevice.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
50 * Report socket allocation statistics [mea@utu.fi]
52 static int sockstat_seq_show(struct seq_file *seq, void *v)
55 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
56 sock_prot_inuse_get(&tcp_prot),
57 atomic_read(&tcp_orphan_count),
58 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
59 atomic_read(&tcp_memory_allocated));
60 seq_printf(seq, "UDP: inuse %d mem %d\n", sock_prot_inuse_get(&udp_prot),
61 atomic_read(&udp_memory_allocated));
62 #ifdef CONFIG_IP_UDPLITE
63 seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse_get(&udplite_prot));
65 seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse_get(&raw_prot));
66 seq_printf(seq, "FRAG: inuse %d memory %d\n",
67 ip_frag_nqueues(&init_net), ip_frag_mem(&init_net));
71 static int sockstat_seq_open(struct inode *inode, struct file *file)
73 return single_open(file, sockstat_seq_show, NULL);
76 static const struct file_operations sockstat_seq_fops = {
78 .open = sockstat_seq_open,
81 .release = single_release,
85 static const struct snmp_mib snmp4_ipstats_list[] = {
86 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
87 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
88 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
89 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
90 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
91 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
92 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
93 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
94 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
95 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
96 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
97 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
98 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
99 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
100 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
101 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
102 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
106 /* Following RFC4293 items are displayed in /proc/net/netstat */
107 static const struct snmp_mib snmp4_ipextstats_list[] = {
108 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
109 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
110 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
111 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
112 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
113 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
121 { "DestUnreachs", ICMP_DEST_UNREACH },
122 { "TimeExcds", ICMP_TIME_EXCEEDED },
123 { "ParmProbs", ICMP_PARAMETERPROB },
124 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
125 { "Redirects", ICMP_REDIRECT },
126 { "Echos", ICMP_ECHO },
127 { "EchoReps", ICMP_ECHOREPLY },
128 { "Timestamps", ICMP_TIMESTAMP },
129 { "TimestampReps", ICMP_TIMESTAMPREPLY },
130 { "AddrMasks", ICMP_ADDRESS },
131 { "AddrMaskReps", ICMP_ADDRESSREPLY },
136 static const struct snmp_mib snmp4_tcp_list[] = {
137 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
138 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
139 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
140 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
141 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
142 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
143 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
144 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
145 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
146 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
147 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
148 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
149 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
150 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
154 static const struct snmp_mib snmp4_udp_list[] = {
155 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
156 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
157 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
158 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
159 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
160 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
164 static const struct snmp_mib snmp4_net_list[] = {
165 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
166 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
167 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
168 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
169 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
170 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
171 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
172 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
173 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
174 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
175 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
176 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
177 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
178 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
179 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
180 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
181 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
182 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
183 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
184 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
185 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
186 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
187 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
188 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
189 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
190 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
191 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
192 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
193 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
194 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
195 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
196 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
197 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
198 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
199 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
200 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
201 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
202 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
203 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
204 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
205 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
206 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
207 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
208 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
209 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
210 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
211 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
212 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
213 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
214 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
215 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
216 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
217 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
218 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
219 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
220 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
221 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
222 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
223 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
224 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
225 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
226 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
227 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
228 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
229 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
230 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
231 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
232 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
233 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
237 static void icmpmsg_put(struct seq_file *seq)
242 static int out[PERLINE];
245 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
247 if (snmp_fold_field((void **) icmpmsg_statistics, i))
252 seq_printf(seq, "\nIcmpMsg:");
253 for (j = 0; j < PERLINE; ++j)
254 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
256 seq_printf(seq, "\nIcmpMsg: ");
257 for (j = 0; j < PERLINE; ++j)
258 seq_printf(seq, " %lu",
259 snmp_fold_field((void **) icmpmsg_statistics,
264 seq_printf(seq, "\nIcmpMsg:");
265 for (j = 0; j < count; ++j)
266 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
267 "In", out[j] & 0xff);
268 seq_printf(seq, "\nIcmpMsg:");
269 for (j = 0; j < count; ++j)
270 seq_printf(seq, " %lu", snmp_fold_field((void **)
271 icmpmsg_statistics, out[j]));
277 static void icmp_put(struct seq_file *seq)
281 seq_puts(seq, "\nIcmp: InMsgs InErrors");
282 for (i=0; icmpmibmap[i].name != NULL; i++)
283 seq_printf(seq, " In%s", icmpmibmap[i].name);
284 seq_printf(seq, " OutMsgs OutErrors");
285 for (i=0; icmpmibmap[i].name != NULL; i++)
286 seq_printf(seq, " Out%s", icmpmibmap[i].name);
287 seq_printf(seq, "\nIcmp: %lu %lu",
288 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
289 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
290 for (i=0; icmpmibmap[i].name != NULL; i++)
291 seq_printf(seq, " %lu",
292 snmp_fold_field((void **) icmpmsg_statistics,
293 icmpmibmap[i].index));
294 seq_printf(seq, " %lu %lu",
295 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
296 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
297 for (i=0; icmpmibmap[i].name != NULL; i++)
298 seq_printf(seq, " %lu",
299 snmp_fold_field((void **) icmpmsg_statistics,
300 icmpmibmap[i].index | 0x100));
304 * Called from the PROCfs module. This outputs /proc/net/snmp.
306 static int snmp_seq_show(struct seq_file *seq, void *v)
310 seq_puts(seq, "Ip: Forwarding DefaultTTL");
312 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
313 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
315 seq_printf(seq, "\nIp: %d %d",
316 IPV4_DEVCONF_ALL(&init_net, FORWARDING) ? 1 : 2,
317 sysctl_ip_default_ttl);
319 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
320 seq_printf(seq, " %lu",
321 snmp_fold_field((void **)ip_statistics,
322 snmp4_ipstats_list[i].entry));
324 icmp_put(seq); /* RFC 2011 compatibility */
327 seq_puts(seq, "\nTcp:");
328 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
329 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
331 seq_puts(seq, "\nTcp:");
332 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
333 /* MaxConn field is signed, RFC 2012 */
334 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
335 seq_printf(seq, " %ld",
336 snmp_fold_field((void **)tcp_statistics,
337 snmp4_tcp_list[i].entry));
339 seq_printf(seq, " %lu",
340 snmp_fold_field((void **)tcp_statistics,
341 snmp4_tcp_list[i].entry));
344 seq_puts(seq, "\nUdp:");
345 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
346 seq_printf(seq, " %s", snmp4_udp_list[i].name);
348 seq_puts(seq, "\nUdp:");
349 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
350 seq_printf(seq, " %lu",
351 snmp_fold_field((void **)udp_statistics,
352 snmp4_udp_list[i].entry));
354 #ifdef CONFIG_IP_UDPLITE
355 /* the UDP and UDP-Lite MIBs are the same */
356 seq_puts(seq, "\nUdpLite:");
357 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
358 seq_printf(seq, " %s", snmp4_udp_list[i].name);
360 seq_puts(seq, "\nUdpLite:");
361 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
362 seq_printf(seq, " %lu",
363 snmp_fold_field((void **)udplite_statistics,
364 snmp4_udp_list[i].entry));
370 static int snmp_seq_open(struct inode *inode, struct file *file)
372 return single_open(file, snmp_seq_show, NULL);
375 static const struct file_operations snmp_seq_fops = {
376 .owner = THIS_MODULE,
377 .open = snmp_seq_open,
380 .release = single_release,
386 * Output /proc/net/netstat
388 static int netstat_seq_show(struct seq_file *seq, void *v)
392 seq_puts(seq, "TcpExt:");
393 for (i = 0; snmp4_net_list[i].name != NULL; i++)
394 seq_printf(seq, " %s", snmp4_net_list[i].name);
396 seq_puts(seq, "\nTcpExt:");
397 for (i = 0; snmp4_net_list[i].name != NULL; i++)
398 seq_printf(seq, " %lu",
399 snmp_fold_field((void **)net_statistics,
400 snmp4_net_list[i].entry));
402 seq_puts(seq, "\nIpExt:");
403 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
404 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
406 seq_puts(seq, "\nIpExt:");
407 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
408 seq_printf(seq, " %lu",
409 snmp_fold_field((void **)ip_statistics,
410 snmp4_ipextstats_list[i].entry));
416 static int netstat_seq_open(struct inode *inode, struct file *file)
418 return single_open(file, netstat_seq_show, NULL);
421 static const struct file_operations netstat_seq_fops = {
422 .owner = THIS_MODULE,
423 .open = netstat_seq_open,
426 .release = single_release,
429 int __init ip_misc_proc_init(void)
433 if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
436 if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
439 if (!proc_net_fops_create(&init_net, "sockstat", S_IRUGO, &sockstat_seq_fops))
444 proc_net_remove(&init_net, "snmp");
446 proc_net_remove(&init_net, "netstat");