[NET]: sparse warning fixes
[linux-2.6.git] / 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 static int fold_prot_inuse(struct proto *proto)
50 {
51         int res = 0;
52         int cpu;
53
54         for_each_possible_cpu(cpu)
55                 res += proto->stats[cpu].inuse;
56
57         return res;
58 }
59
60 /*
61  *      Report socket allocation statistics [mea@utu.fi]
62  */
63 static int sockstat_seq_show(struct seq_file *seq, void *v)
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_death_row.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, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot));
72         seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
73         seq_printf(seq,  "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
74                    atomic_read(&ip_frag_mem));
75         return 0;
76 }
77
78 static int sockstat_seq_open(struct inode *inode, struct file *file)
79 {
80         return single_open(file, sockstat_seq_show, NULL);
81 }
82
83 static const struct file_operations sockstat_seq_fops = {
84         .owner   = THIS_MODULE,
85         .open    = sockstat_seq_open,
86         .read    = seq_read,
87         .llseek  = seq_lseek,
88         .release = single_release,
89 };
90
91 /* snmp items */
92 static const struct snmp_mib snmp4_ipstats_list[] = {
93         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
94         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
95         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
96         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
97         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
98         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
99         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
100         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
101         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
102         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
103         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
104         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
105         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
106         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
107         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
108         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
109         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
110         SNMP_MIB_SENTINEL
111 };
112
113 /* Following RFC4293 items are displayed in /proc/net/netstat */
114 static const struct snmp_mib snmp4_ipextstats_list[] = {
115         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
116         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
117         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
118         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
119         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
120         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
121         SNMP_MIB_SENTINEL
122 };
123
124 static const struct snmp_mib snmp4_icmp_list[] = {
125         SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
126         SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
127         SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
128         SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
129         SNMP_MIB_SENTINEL
130 };
131
132 static struct {
133         char *name;
134         int index;
135 } icmpmibmap[] = {
136         { "DestUnreachs", ICMP_DEST_UNREACH },
137         { "TimeExcds", ICMP_TIME_EXCEEDED },
138         { "ParmProbs", ICMP_PARAMETERPROB },
139         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
140         { "Redirects", ICMP_REDIRECT },
141         { "Echos", ICMP_ECHO },
142         { "EchoReps", ICMP_ECHOREPLY },
143         { "Timestamps", ICMP_TIMESTAMP },
144         { "TimestampReps", ICMP_TIMESTAMPREPLY },
145         { "AddrMasks", ICMP_ADDRESS },
146         { "AddrMaskReps", ICMP_ADDRESSREPLY },
147         { NULL, 0 }
148 };
149
150
151 static const struct snmp_mib snmp4_tcp_list[] = {
152         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
153         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
154         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
155         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
156         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
157         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
158         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
159         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
160         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
161         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
162         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
163         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
164         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
165         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
166         SNMP_MIB_SENTINEL
167 };
168
169 static const struct snmp_mib snmp4_udp_list[] = {
170         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
171         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
172         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
173         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
174         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
175         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
176         SNMP_MIB_SENTINEL
177 };
178
179 static const struct snmp_mib snmp4_net_list[] = {
180         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_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
246         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
247         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
248         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
249         SNMP_MIB_SENTINEL
250 };
251
252 static void icmpmsg_put(struct seq_file *seq)
253 {
254 #define PERLINE 16
255
256         int j, i, count;
257         static int out[PERLINE];
258
259         count = 0;
260         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
261
262                 if (snmp_fold_field((void **) icmpmsg_statistics, i))
263                         out[count++] = i;
264                 if (count < PERLINE)
265                         continue;
266
267                 seq_printf(seq, "\nIcmpMsg:");
268                 for (j = 0; j < PERLINE; ++j)
269                         seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
270                                         i & 0xff);
271                 seq_printf(seq, "\nIcmpMsg: ");
272                 for (j = 0; j < PERLINE; ++j)
273                         seq_printf(seq, " %lu",
274                                 snmp_fold_field((void **) icmpmsg_statistics,
275                                 out[j]));
276                 seq_putc(seq, '\n');
277         }
278         if (count) {
279                 seq_printf(seq, "\nIcmpMsg:");
280                 for (j = 0; j < count; ++j)
281                         seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
282                                 "In", out[j] & 0xff);
283                 seq_printf(seq, "\nIcmpMsg:");
284                 for (j = 0; j < count; ++j)
285                         seq_printf(seq, " %lu", snmp_fold_field((void **)
286                                 icmpmsg_statistics, out[j]));
287         }
288
289 #undef PERLINE
290 }
291
292 static void icmp_put(struct seq_file *seq)
293 {
294         int i;
295
296         seq_puts(seq, "\nIcmp: InMsgs InErrors");
297         for (i=0; icmpmibmap[i].name != NULL; i++)
298                 seq_printf(seq, " In%s", icmpmibmap[i].name);
299         seq_printf(seq, " OutMsgs OutErrors");
300         for (i=0; icmpmibmap[i].name != NULL; i++)
301                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
302         seq_printf(seq, "\nIcmp: %lu %lu",
303                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
304                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
305         for (i=0; icmpmibmap[i].name != NULL; i++)
306                 seq_printf(seq, " %lu",
307                         snmp_fold_field((void **) icmpmsg_statistics,
308                                 icmpmibmap[i].index));
309         seq_printf(seq, " %lu %lu",
310                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
311                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
312         for (i=0; icmpmibmap[i].name != NULL; i++)
313                 seq_printf(seq, " %lu",
314                         snmp_fold_field((void **) icmpmsg_statistics,
315                                 icmpmibmap[i].index));
316 }
317
318 /*
319  *      Called from the PROCfs module. This outputs /proc/net/snmp.
320  */
321 static int snmp_seq_show(struct seq_file *seq, void *v)
322 {
323         int i;
324
325         seq_puts(seq, "Ip: Forwarding DefaultTTL");
326
327         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
328                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
329
330         seq_printf(seq, "\nIp: %d %d",
331                    IPV4_DEVCONF_ALL(FORWARDING) ? 1 : 2, sysctl_ip_default_ttl);
332
333         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
334                 seq_printf(seq, " %lu",
335                            snmp_fold_field((void **)ip_statistics,
336                                            snmp4_ipstats_list[i].entry));
337
338         icmp_put(seq);  /* RFC 2011 compatibility */
339         icmpmsg_put(seq);
340
341         seq_puts(seq, "\nTcp:");
342         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
343                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
344
345         seq_puts(seq, "\nTcp:");
346         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
347                 /* MaxConn field is signed, RFC 2012 */
348                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
349                         seq_printf(seq, " %ld",
350                                    snmp_fold_field((void **)tcp_statistics,
351                                                    snmp4_tcp_list[i].entry));
352                 else
353                         seq_printf(seq, " %lu",
354                                    snmp_fold_field((void **)tcp_statistics,
355                                                    snmp4_tcp_list[i].entry));
356         }
357
358         seq_puts(seq, "\nUdp:");
359         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
360                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
361
362         seq_puts(seq, "\nUdp:");
363         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
364                 seq_printf(seq, " %lu",
365                            snmp_fold_field((void **)udp_statistics,
366                                            snmp4_udp_list[i].entry));
367
368         /* the UDP and UDP-Lite MIBs are the same */
369         seq_puts(seq, "\nUdpLite:");
370         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
371                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
372
373         seq_puts(seq, "\nUdpLite:");
374         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
375                 seq_printf(seq, " %lu",
376                            snmp_fold_field((void **)udplite_statistics,
377                                            snmp4_udp_list[i].entry));
378
379         seq_putc(seq, '\n');
380         return 0;
381 }
382
383 static int snmp_seq_open(struct inode *inode, struct file *file)
384 {
385         return single_open(file, snmp_seq_show, NULL);
386 }
387
388 static const struct file_operations snmp_seq_fops = {
389         .owner   = THIS_MODULE,
390         .open    = snmp_seq_open,
391         .read    = seq_read,
392         .llseek  = seq_lseek,
393         .release = single_release,
394 };
395
396
397
398 /*
399  *      Output /proc/net/netstat
400  */
401 static int netstat_seq_show(struct seq_file *seq, void *v)
402 {
403         int i;
404
405         seq_puts(seq, "TcpExt:");
406         for (i = 0; snmp4_net_list[i].name != NULL; i++)
407                 seq_printf(seq, " %s", snmp4_net_list[i].name);
408
409         seq_puts(seq, "\nTcpExt:");
410         for (i = 0; snmp4_net_list[i].name != NULL; i++)
411                 seq_printf(seq, " %lu",
412                            snmp_fold_field((void **)net_statistics,
413                                            snmp4_net_list[i].entry));
414
415         seq_puts(seq, "\nIpExt:");
416         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
417                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
418
419         seq_puts(seq, "\nIpExt:");
420         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
421                 seq_printf(seq, " %lu",
422                            snmp_fold_field((void **)ip_statistics,
423                                            snmp4_ipextstats_list[i].entry));
424
425         seq_putc(seq, '\n');
426         return 0;
427 }
428
429 static int netstat_seq_open(struct inode *inode, struct file *file)
430 {
431         return single_open(file, netstat_seq_show, NULL);
432 }
433
434 static const struct file_operations netstat_seq_fops = {
435         .owner   = THIS_MODULE,
436         .open    = netstat_seq_open,
437         .read    = seq_read,
438         .llseek  = seq_lseek,
439         .release = single_release,
440 };
441
442 int __init ip_misc_proc_init(void)
443 {
444         int rc = 0;
445
446         if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
447                 goto out_netstat;
448
449         if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
450                 goto out_snmp;
451
452         if (!proc_net_fops_create(&init_net, "sockstat", S_IRUGO, &sockstat_seq_fops))
453                 goto out_sockstat;
454 out:
455         return rc;
456 out_sockstat:
457         proc_net_remove(&init_net, "snmp");
458 out_snmp:
459         proc_net_remove(&init_net, "netstat");
460 out_netstat:
461         rc = -ENOMEM;
462         goto out;
463 }
464