blob: 912bbcc7f4152efb998f20328d433d0535dc0f85 [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>
41#include <linux/proc_fs.h>
42#include <linux/seq_file.h>
43#include <net/sock.h>
44#include <net/raw.h>
45
46static int fold_prot_inuse(struct proto *proto)
47{
48 int res = 0;
49 int cpu;
50
51 for (cpu = 0; cpu < NR_CPUS; cpu++)
52 res += proto->stats[cpu].inuse;
53
54 return res;
55}
56
57/*
58 * Report socket allocation statistics [mea@utu.fi]
59 */
60static int sockstat_seq_show(struct seq_file *seq, void *v)
61{
62 /* From net/socket.c */
63 extern void socket_seq_show(struct seq_file *seq);
64
65 socket_seq_show(seq);
66 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
67 fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
68 tcp_tw_count, atomic_read(&tcp_sockets_allocated),
69 atomic_read(&tcp_memory_allocated));
70 seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
71 seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
72 seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
73 atomic_read(&ip_frag_mem));
74 return 0;
75}
76
77static int sockstat_seq_open(struct inode *inode, struct file *file)
78{
79 return single_open(file, sockstat_seq_show, NULL);
80}
81
82static struct file_operations sockstat_seq_fops = {
83 .owner = THIS_MODULE,
84 .open = sockstat_seq_open,
85 .read = seq_read,
86 .llseek = seq_lseek,
87 .release = single_release,
88};
89
90static unsigned long
91fold_field(void *mib[], int offt)
92{
93 unsigned long res = 0;
94 int i;
95
96 for (i = 0; i < NR_CPUS; i++) {
97 if (!cpu_possible(i))
98 continue;
99 res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
100 res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
101 }
102 return res;
103}
104
105/* snmp items */
106static struct snmp_mib snmp4_ipstats_list[] = {
107 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
108 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
109 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
110 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
111 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
112 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
113 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
114 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
115 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
116 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
117 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
118 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
119 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
120 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
121 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
122 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
123 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
124 SNMP_MIB_SENTINEL
125};
126
127static struct snmp_mib snmp4_icmp_list[] = {
128 SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
129 SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
130 SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
131 SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS),
132 SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS),
133 SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS),
134 SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS),
135 SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS),
136 SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS),
137 SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS),
138 SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS),
139 SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS),
140 SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS),
141 SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
142 SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
143 SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS),
144 SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS),
145 SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS),
146 SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS),
147 SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS),
148 SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS),
149 SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS),
150 SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS),
151 SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS),
152 SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS),
153 SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS),
154 SNMP_MIB_SENTINEL
155};
156
157static struct snmp_mib snmp4_tcp_list[] = {
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),
172 SNMP_MIB_SENTINEL
173};
174
175static struct snmp_mib snmp4_udp_list[] = {
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),
180 SNMP_MIB_SENTINEL
181};
182
183static struct snmp_mib snmp4_net_list[] = {
184 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
185 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
186 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
187 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
188 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
189 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
190 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
191 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
192 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
193 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
194 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
195 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
196 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
197 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
198 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
199 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
200 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
201 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
202 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
203 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
204 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
205 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
206 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
207 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
208 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
209 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
210 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
211 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
212 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
213 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
214 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
215 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
216 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
217 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
218 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
219 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
220 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
221 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
222 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
223 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
224 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
225 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
226 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
227 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
228 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
229 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
230 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
231 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
232 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
233 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
234 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
235 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
236 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
237 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
238 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
239 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
240 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
241 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
242 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
243 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
244 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
245 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
246 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
247 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
248 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
249 SNMP_MIB_SENTINEL
250};
251
252/*
253 * Called from the PROCfs module. This outputs /proc/net/snmp.
254 */
255static int snmp_seq_show(struct seq_file *seq, void *v)
256{
257 int i;
258
259 seq_puts(seq, "Ip: Forwarding DefaultTTL");
260
261 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
262 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
263
264 seq_printf(seq, "\nIp: %d %d",
265 ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
266
267 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
268 seq_printf(seq, " %lu",
269 fold_field((void **) ip_statistics,
270 snmp4_ipstats_list[i].entry));
271
272 seq_puts(seq, "\nIcmp:");
273 for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
274 seq_printf(seq, " %s", snmp4_icmp_list[i].name);
275
276 seq_puts(seq, "\nIcmp:");
277 for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
278 seq_printf(seq, " %lu",
279 fold_field((void **) icmp_statistics,
280 snmp4_icmp_list[i].entry));
281
282 seq_puts(seq, "\nTcp:");
283 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
284 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
285
286 seq_puts(seq, "\nTcp:");
287 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
288 /* MaxConn field is signed, RFC 2012 */
289 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
290 seq_printf(seq, " %ld",
291 fold_field((void **) tcp_statistics,
292 snmp4_tcp_list[i].entry));
293 else
294 seq_printf(seq, " %lu",
295 fold_field((void **) tcp_statistics,
296 snmp4_tcp_list[i].entry));
297 }
298
299 seq_puts(seq, "\nUdp:");
300 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
301 seq_printf(seq, " %s", snmp4_udp_list[i].name);
302
303 seq_puts(seq, "\nUdp:");
304 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
305 seq_printf(seq, " %lu",
306 fold_field((void **) udp_statistics,
307 snmp4_udp_list[i].entry));
308
309 seq_putc(seq, '\n');
310 return 0;
311}
312
313static int snmp_seq_open(struct inode *inode, struct file *file)
314{
315 return single_open(file, snmp_seq_show, NULL);
316}
317
318static struct file_operations snmp_seq_fops = {
319 .owner = THIS_MODULE,
320 .open = snmp_seq_open,
321 .read = seq_read,
322 .llseek = seq_lseek,
323 .release = single_release,
324};
325
326/*
327 * Output /proc/net/netstat
328 */
329static int netstat_seq_show(struct seq_file *seq, void *v)
330{
331 int i;
332
333 seq_puts(seq, "TcpExt:");
334 for (i = 0; snmp4_net_list[i].name != NULL; i++)
335 seq_printf(seq, " %s", snmp4_net_list[i].name);
336
337 seq_puts(seq, "\nTcpExt:");
338 for (i = 0; snmp4_net_list[i].name != NULL; i++)
339 seq_printf(seq, " %lu",
340 fold_field((void **) net_statistics,
341 snmp4_net_list[i].entry));
342
343 seq_putc(seq, '\n');
344 return 0;
345}
346
347static int netstat_seq_open(struct inode *inode, struct file *file)
348{
349 return single_open(file, netstat_seq_show, NULL);
350}
351
352static struct file_operations netstat_seq_fops = {
353 .owner = THIS_MODULE,
354 .open = netstat_seq_open,
355 .read = seq_read,
356 .llseek = seq_lseek,
357 .release = single_release,
358};
359
360int __init ip_misc_proc_init(void)
361{
362 int rc = 0;
363
364 if (!proc_net_fops_create("netstat", S_IRUGO, &netstat_seq_fops))
365 goto out_netstat;
366
367 if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops))
368 goto out_snmp;
369
370 if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops))
371 goto out_sockstat;
372out:
373 return rc;
374out_sockstat:
375 proc_net_remove("snmp");
376out_snmp:
377 proc_net_remove("netstat");
378out_netstat:
379 rc = -ENOMEM;
380 goto out;
381}
382