blob: d61e2a9d394d24d22d282deabba9fafeb088affa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 * Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
11 *
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>
16 *
17 * Fixes:
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
30 *
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.
35 */
36#include <linux/types.h>
37#include <net/icmp.h>
38#include <net/protocol.h>
39#include <net/tcp.h>
40#include <net/udp.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020041#include <linux/inetdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/proc_fs.h>
43#include <linux/seq_file.h>
44#include <net/sock.h>
45#include <net/raw.h>
46
47static int fold_prot_inuse(struct proto *proto)
48{
49 int res = 0;
50 int cpu;
51
KAMEZAWA Hiroyuki6f912042006-04-10 22:52:50 -070052 for_each_possible_cpu(cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 res += proto->stats[cpu].inuse;
54
55 return res;
56}
57
58/*
59 * Report socket allocation statistics [mea@utu.fi]
60 */
61static int sockstat_seq_show(struct seq_file *seq, void *v)
62{
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 socket_seq_show(seq);
64 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
65 fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -070066 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 atomic_read(&tcp_memory_allocated));
68 seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
69 seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
70 seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
71 atomic_read(&ip_frag_mem));
72 return 0;
73}
74
75static int sockstat_seq_open(struct inode *inode, struct file *file)
76{
77 return single_open(file, sockstat_seq_show, NULL);
78}
79
80static struct file_operations sockstat_seq_fops = {
81 .owner = THIS_MODULE,
82 .open = sockstat_seq_open,
83 .read = seq_read,
84 .llseek = seq_lseek,
85 .release = single_release,
86};
87
88static unsigned long
89fold_field(void *mib[], int offt)
90{
91 unsigned long res = 0;
92 int i;
93
KAMEZAWA Hiroyuki6f912042006-04-10 22:52:50 -070094 for_each_possible_cpu(i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
96 res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
97 }
98 return res;
99}
100
101/* snmp items */
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800102static const struct snmp_mib snmp4_ipstats_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
104 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
105 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
106 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
107 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
108 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
109 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
110 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
111 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
112 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
113 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
114 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
115 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
116 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
117 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
118 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
119 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
120 SNMP_MIB_SENTINEL
121};
122
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800123static const struct snmp_mib snmp4_icmp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
125 SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
126 SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
127 SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS),
128 SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS),
129 SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS),
130 SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS),
131 SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS),
132 SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS),
133 SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS),
134 SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS),
135 SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS),
136 SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS),
137 SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
138 SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
139 SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS),
140 SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS),
141 SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS),
142 SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS),
143 SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS),
144 SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS),
145 SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS),
146 SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS),
147 SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS),
148 SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS),
149 SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS),
150 SNMP_MIB_SENTINEL
151};
152
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800153static const struct snmp_mib snmp4_tcp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
155 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
156 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
157 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
158 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
159 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
160 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
161 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
162 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
163 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
164 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
165 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
166 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
167 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
168 SNMP_MIB_SENTINEL
169};
170
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800171static const struct snmp_mib snmp4_udp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
173 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
174 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
175 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
176 SNMP_MIB_SENTINEL
177};
178
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800179static const struct snmp_mib snmp4_net_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
181 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
182 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
183 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
184 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
185 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
186 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
187 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
188 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
189 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
190 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
191 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
192 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
193 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
194 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
195 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
196 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
197 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
198 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
199 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
200 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
201 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
202 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
203 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
204 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
205 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
206 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
207 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
208 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
209 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
210 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
211 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
212 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
213 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
214 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
215 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
216 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
217 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
218 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
219 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
220 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
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),
226 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
227 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
228 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
229 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
230 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
231 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
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),
237 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
238 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
239 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
240 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
241 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
242 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
243 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
244 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
245 SNMP_MIB_SENTINEL
246};
247
248/*
249 * Called from the PROCfs module. This outputs /proc/net/snmp.
250 */
251static int snmp_seq_show(struct seq_file *seq, void *v)
252{
253 int i;
254
255 seq_puts(seq, "Ip: Forwarding DefaultTTL");
256
257 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
258 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
259
260 seq_printf(seq, "\nIp: %d %d",
261 ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
262
263 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
264 seq_printf(seq, " %lu",
265 fold_field((void **) ip_statistics,
266 snmp4_ipstats_list[i].entry));
267
268 seq_puts(seq, "\nIcmp:");
269 for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
270 seq_printf(seq, " %s", snmp4_icmp_list[i].name);
271
272 seq_puts(seq, "\nIcmp:");
273 for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
274 seq_printf(seq, " %lu",
275 fold_field((void **) icmp_statistics,
276 snmp4_icmp_list[i].entry));
277
278 seq_puts(seq, "\nTcp:");
279 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
280 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
281
282 seq_puts(seq, "\nTcp:");
283 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
284 /* MaxConn field is signed, RFC 2012 */
285 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
286 seq_printf(seq, " %ld",
287 fold_field((void **) tcp_statistics,
288 snmp4_tcp_list[i].entry));
289 else
290 seq_printf(seq, " %lu",
291 fold_field((void **) tcp_statistics,
292 snmp4_tcp_list[i].entry));
293 }
294
295 seq_puts(seq, "\nUdp:");
296 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
297 seq_printf(seq, " %s", snmp4_udp_list[i].name);
298
299 seq_puts(seq, "\nUdp:");
300 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
301 seq_printf(seq, " %lu",
302 fold_field((void **) udp_statistics,
303 snmp4_udp_list[i].entry));
304
305 seq_putc(seq, '\n');
306 return 0;
307}
308
309static int snmp_seq_open(struct inode *inode, struct file *file)
310{
311 return single_open(file, snmp_seq_show, NULL);
312}
313
314static struct file_operations snmp_seq_fops = {
315 .owner = THIS_MODULE,
316 .open = snmp_seq_open,
317 .read = seq_read,
318 .llseek = seq_lseek,
319 .release = single_release,
320};
321
322/*
323 * Output /proc/net/netstat
324 */
325static int netstat_seq_show(struct seq_file *seq, void *v)
326{
327 int i;
328
329 seq_puts(seq, "TcpExt:");
330 for (i = 0; snmp4_net_list[i].name != NULL; i++)
331 seq_printf(seq, " %s", snmp4_net_list[i].name);
332
333 seq_puts(seq, "\nTcpExt:");
334 for (i = 0; snmp4_net_list[i].name != NULL; i++)
335 seq_printf(seq, " %lu",
336 fold_field((void **) net_statistics,
337 snmp4_net_list[i].entry));
338
339 seq_putc(seq, '\n');
340 return 0;
341}
342
343static int netstat_seq_open(struct inode *inode, struct file *file)
344{
345 return single_open(file, netstat_seq_show, NULL);
346}
347
348static struct file_operations netstat_seq_fops = {
349 .owner = THIS_MODULE,
350 .open = netstat_seq_open,
351 .read = seq_read,
352 .llseek = seq_lseek,
353 .release = single_release,
354};
355
356int __init ip_misc_proc_init(void)
357{
358 int rc = 0;
359
360 if (!proc_net_fops_create("netstat", S_IRUGO, &netstat_seq_fops))
361 goto out_netstat;
362
363 if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops))
364 goto out_snmp;
365
366 if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops))
367 goto out_sockstat;
368out:
369 return rc;
370out_sockstat:
371 proc_net_remove("snmp");
372out_snmp:
373 proc_net_remove("netstat");
374out_netstat:
375 rc = -ENOMEM;
376 goto out;
377}
378