Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / net / ipv4 / proc.c
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  *
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/net_namespace.h>
38 #include <net/icmp.h>
39 #include <net/protocol.h>
40 #include <net/tcp.h>
41 #include <net/udp.h>
42 #include <net/udplite.h>
43 #include <linux/inetdevice.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/sock.h>
47 #include <net/raw.h>
48
49 /*
50  *      Report socket allocation statistics [mea@utu.fi]
51  */
52 static int sockstat_seq_show(struct seq_file *seq, void *v)
53 {
54         socket_seq_show(seq);
55         seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
56                    sock_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
57                    tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
58                    atomic_read(&tcp_memory_allocated));
59         seq_printf(seq, "UDP: inuse %d\n", sock_prot_inuse(&udp_prot));
60         seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse(&udplite_prot));
61         seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse(&raw_prot));
62         seq_printf(seq,  "FRAG: inuse %d memory %d\n",
63                         ip_frag_nqueues(), ip_frag_mem());
64         return 0;
65 }
66
67 static int sockstat_seq_open(struct inode *inode, struct file *file)
68 {
69         return single_open(file, sockstat_seq_show, NULL);
70 }
71
72 static const struct file_operations sockstat_seq_fops = {
73         .owner   = THIS_MODULE,
74         .open    = sockstat_seq_open,
75         .read    = seq_read,
76         .llseek  = seq_lseek,
77         .release = single_release,
78 };
79
80 /* snmp items */
81 static const struct snmp_mib snmp4_ipstats_list[] = {
82         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
83         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
84         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
85         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
86         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
87         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
88         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
89         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
90         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
91         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
92         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
93         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
94         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
95         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
96         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
97         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
98         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
99         SNMP_MIB_SENTINEL
100 };
101
102 /* Following RFC4293 items are displayed in /proc/net/netstat */
103 static const struct snmp_mib snmp4_ipextstats_list[] = {
104         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
105         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
106         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
107         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
108         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
109         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
110         SNMP_MIB_SENTINEL
111 };
112
113 static struct {
114         char *name;
115         int index;
116 } icmpmibmap[] = {
117         { "DestUnreachs", ICMP_DEST_UNREACH },
118         { "TimeExcds", ICMP_TIME_EXCEEDED },
119         { "ParmProbs", ICMP_PARAMETERPROB },
120         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
121         { "Redirects", ICMP_REDIRECT },
122         { "Echos", ICMP_ECHO },
123         { "EchoReps", ICMP_ECHOREPLY },
124         { "Timestamps", ICMP_TIMESTAMP },
125         { "TimestampReps", ICMP_TIMESTAMPREPLY },
126         { "AddrMasks", ICMP_ADDRESS },
127         { "AddrMaskReps", ICMP_ADDRESSREPLY },
128         { NULL, 0 }
129 };
130
131
132 static const struct snmp_mib snmp4_tcp_list[] = {
133         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
134         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
135         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
136         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
137         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
138         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
139         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
140         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
141         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
142         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
143         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
144         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
145         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
146         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
147         SNMP_MIB_SENTINEL
148 };
149
150 static const struct snmp_mib snmp4_udp_list[] = {
151         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
152         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
153         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
154         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
155         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
156         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
157         SNMP_MIB_SENTINEL
158 };
159
160 static const struct snmp_mib snmp4_net_list[] = {
161         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
162         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
163         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
164         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
165         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
166         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
167         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
168         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
169         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
170         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
171         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
172         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
173         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
174         SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
175         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
176         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
177         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
178         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
179         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
180         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
181         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
182         SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
183         SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
184         SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
185         SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
186         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
187         SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
188         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
189         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
190         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
191         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
192         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
193         SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
194         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
195         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
196         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
197         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
198         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
199         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
200         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
201         SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
202         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
203         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
204         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
205         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
206         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
207         SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
208         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
209         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
210         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
211         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
212         SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
213         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
214         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
215         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
216         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
217         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
218         SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
219         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
220         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
221         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
222         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
223         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
224         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
225         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
226         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
227         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
228         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
229         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
230         SNMP_MIB_SENTINEL
231 };
232
233 static void icmpmsg_put(struct seq_file *seq)
234 {
235 #define PERLINE 16
236
237         int j, i, count;
238         static int out[PERLINE];
239
240         count = 0;
241         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
242
243                 if (snmp_fold_field((void **) icmpmsg_statistics, i))
244                         out[count++] = i;
245                 if (count < PERLINE)
246                         continue;
247
248                 seq_printf(seq, "\nIcmpMsg:");
249                 for (j = 0; j < PERLINE; ++j)
250                         seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
251                                         i & 0xff);
252                 seq_printf(seq, "\nIcmpMsg: ");
253                 for (j = 0; j < PERLINE; ++j)
254                         seq_printf(seq, " %lu",
255                                 snmp_fold_field((void **) icmpmsg_statistics,
256                                 out[j]));
257                 seq_putc(seq, '\n');
258         }
259         if (count) {
260                 seq_printf(seq, "\nIcmpMsg:");
261                 for (j = 0; j < count; ++j)
262                         seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
263                                 "In", out[j] & 0xff);
264                 seq_printf(seq, "\nIcmpMsg:");
265                 for (j = 0; j < count; ++j)
266                         seq_printf(seq, " %lu", snmp_fold_field((void **)
267                                 icmpmsg_statistics, out[j]));
268         }
269
270 #undef PERLINE
271 }
272
273 static void icmp_put(struct seq_file *seq)
274 {
275         int i;
276
277         seq_puts(seq, "\nIcmp: InMsgs InErrors");
278         for (i=0; icmpmibmap[i].name != NULL; i++)
279                 seq_printf(seq, " In%s", icmpmibmap[i].name);
280         seq_printf(seq, " OutMsgs OutErrors");
281         for (i=0; icmpmibmap[i].name != NULL; i++)
282                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
283         seq_printf(seq, "\nIcmp: %lu %lu",
284                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
285                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
286         for (i=0; icmpmibmap[i].name != NULL; i++)
287                 seq_printf(seq, " %lu",
288                         snmp_fold_field((void **) icmpmsg_statistics,
289                                 icmpmibmap[i].index));
290         seq_printf(seq, " %lu %lu",
291                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
292                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
293         for (i=0; icmpmibmap[i].name != NULL; i++)
294                 seq_printf(seq, " %lu",
295                         snmp_fold_field((void **) icmpmsg_statistics,
296                                 icmpmibmap[i].index | 0x100));
297 }
298
299 /*
300  *      Called from the PROCfs module. This outputs /proc/net/snmp.
301  */
302 static int snmp_seq_show(struct seq_file *seq, void *v)
303 {
304         int i;
305
306         seq_puts(seq, "Ip: Forwarding DefaultTTL");
307
308         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
309                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
310
311         seq_printf(seq, "\nIp: %d %d",
312                    IPV4_DEVCONF_ALL(FORWARDING) ? 1 : 2, sysctl_ip_default_ttl);
313
314         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
315                 seq_printf(seq, " %lu",
316                            snmp_fold_field((void **)ip_statistics,
317                                            snmp4_ipstats_list[i].entry));
318
319         icmp_put(seq);  /* RFC 2011 compatibility */
320         icmpmsg_put(seq);
321
322         seq_puts(seq, "\nTcp:");
323         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
324                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
325
326         seq_puts(seq, "\nTcp:");
327         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
328                 /* MaxConn field is signed, RFC 2012 */
329                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
330                         seq_printf(seq, " %ld",
331                                    snmp_fold_field((void **)tcp_statistics,
332                                                    snmp4_tcp_list[i].entry));
333                 else
334                         seq_printf(seq, " %lu",
335                                    snmp_fold_field((void **)tcp_statistics,
336                                                    snmp4_tcp_list[i].entry));
337         }
338
339         seq_puts(seq, "\nUdp:");
340         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
341                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
342
343         seq_puts(seq, "\nUdp:");
344         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
345                 seq_printf(seq, " %lu",
346                            snmp_fold_field((void **)udp_statistics,
347                                            snmp4_udp_list[i].entry));
348
349         /* the UDP and UDP-Lite MIBs are the same */
350         seq_puts(seq, "\nUdpLite:");
351         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
352                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
353
354         seq_puts(seq, "\nUdpLite:");
355         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
356                 seq_printf(seq, " %lu",
357                            snmp_fold_field((void **)udplite_statistics,
358                                            snmp4_udp_list[i].entry));
359
360         seq_putc(seq, '\n');
361         return 0;
362 }
363
364 static int snmp_seq_open(struct inode *inode, struct file *file)
365 {
366         return single_open(file, snmp_seq_show, NULL);
367 }
368
369 static const struct file_operations snmp_seq_fops = {
370         .owner   = THIS_MODULE,
371         .open    = snmp_seq_open,
372         .read    = seq_read,
373         .llseek  = seq_lseek,
374         .release = single_release,
375 };
376
377
378
379 /*
380  *      Output /proc/net/netstat
381  */
382 static int netstat_seq_show(struct seq_file *seq, void *v)
383 {
384         int i;
385
386         seq_puts(seq, "TcpExt:");
387         for (i = 0; snmp4_net_list[i].name != NULL; i++)
388                 seq_printf(seq, " %s", snmp4_net_list[i].name);
389
390         seq_puts(seq, "\nTcpExt:");
391         for (i = 0; snmp4_net_list[i].name != NULL; i++)
392                 seq_printf(seq, " %lu",
393                            snmp_fold_field((void **)net_statistics,
394                                            snmp4_net_list[i].entry));
395
396         seq_puts(seq, "\nIpExt:");
397         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
398                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
399
400         seq_puts(seq, "\nIpExt:");
401         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
402                 seq_printf(seq, " %lu",
403                            snmp_fold_field((void **)ip_statistics,
404                                            snmp4_ipextstats_list[i].entry));
405
406         seq_putc(seq, '\n');
407         return 0;
408 }
409
410 static int netstat_seq_open(struct inode *inode, struct file *file)
411 {
412         return single_open(file, netstat_seq_show, NULL);
413 }
414
415 static const struct file_operations netstat_seq_fops = {
416         .owner   = THIS_MODULE,
417         .open    = netstat_seq_open,
418         .read    = seq_read,
419         .llseek  = seq_lseek,
420         .release = single_release,
421 };
422
423 int __init ip_misc_proc_init(void)
424 {
425         int rc = 0;
426
427         if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
428                 goto out_netstat;
429
430         if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
431                 goto out_snmp;
432
433         if (!proc_net_fops_create(&init_net, "sockstat", S_IRUGO, &sockstat_seq_fops))
434                 goto out_sockstat;
435 out:
436         return rc;
437 out_sockstat:
438         proc_net_remove(&init_net, "snmp");
439 out_snmp:
440         proc_net_remove(&init_net, "netstat");
441 out_netstat:
442         rc = -ENOMEM;
443         goto out;
444 }
445