mib: put ip statistics on struct net
[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  * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11  *              Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
12  *              Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
13  *              Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
14  *
15  * Fixes:
16  *              Alan Cox        :       UDP sockets show the rxqueue/txqueue
17  *                                      using hint flag for the netinfo.
18  *      Pauline Middelink       :       identd support
19  *              Alan Cox        :       Make /proc safer.
20  *      Erik Schoenfelder       :       /proc/net/snmp
21  *              Alan Cox        :       Handle dead sockets properly.
22  *      Gerhard Koerting        :       Show both timers
23  *              Alan Cox        :       Allow inode to be NULL (kernel socket)
24  *      Andi Kleen              :       Add support for open_requests and
25  *                                      split functions for more readibility.
26  *      Andi Kleen              :       Add support for /proc/net/netstat
27  *      Arnaldo C. Melo         :       Convert to seq_file
28  *
29  *              This program is free software; you can redistribute it and/or
30  *              modify it under the terms of the GNU General Public License
31  *              as published by the Free Software Foundation; either version
32  *              2 of the License, or (at your option) any later version.
33  */
34 #include <linux/types.h>
35 #include <net/net_namespace.h>
36 #include <net/icmp.h>
37 #include <net/protocol.h>
38 #include <net/tcp.h>
39 #include <net/udp.h>
40 #include <net/udplite.h>
41 #include <linux/inetdevice.h>
42 #include <linux/proc_fs.h>
43 #include <linux/seq_file.h>
44 #include <net/sock.h>
45 #include <net/raw.h>
46
47 /*
48  *      Report socket allocation statistics [mea@utu.fi]
49  */
50 static int sockstat_seq_show(struct seq_file *seq, void *v)
51 {
52         struct net *net = seq->private;
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_get(net, &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",
61                    sock_prot_inuse_get(net, &udp_prot),
62                    atomic_read(&udp_memory_allocated));
63         seq_printf(seq, "UDPLITE: inuse %d\n",
64                    sock_prot_inuse_get(net, &udplite_prot));
65         seq_printf(seq, "RAW: inuse %d\n",
66                    sock_prot_inuse_get(net, &raw_prot));
67         seq_printf(seq,  "FRAG: inuse %d memory %d\n",
68                         ip_frag_nqueues(net), ip_frag_mem(net));
69         return 0;
70 }
71
72 static int sockstat_seq_open(struct inode *inode, struct file *file)
73 {
74         int err;
75         struct net *net;
76
77         err = -ENXIO;
78         net = get_proc_net(inode);
79         if (net == NULL)
80                 goto err_net;
81
82         err = single_open(file, sockstat_seq_show, net);
83         if (err < 0)
84                 goto err_open;
85
86         return 0;
87
88 err_open:
89         put_net(net);
90 err_net:
91         return err;
92 }
93
94 static int sockstat_seq_release(struct inode *inode, struct file *file)
95 {
96         struct net *net = ((struct seq_file *)file->private_data)->private;
97
98         put_net(net);
99         return single_release(inode, file);
100 }
101
102 static const struct file_operations sockstat_seq_fops = {
103         .owner   = THIS_MODULE,
104         .open    = sockstat_seq_open,
105         .read    = seq_read,
106         .llseek  = seq_lseek,
107         .release = sockstat_seq_release,
108 };
109
110 /* snmp items */
111 static const struct snmp_mib snmp4_ipstats_list[] = {
112         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
113         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
114         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
115         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
116         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
117         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
118         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
119         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
120         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
121         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
122         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
123         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
124         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
125         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
126         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
127         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
128         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
129         SNMP_MIB_SENTINEL
130 };
131
132 /* Following RFC4293 items are displayed in /proc/net/netstat */
133 static const struct snmp_mib snmp4_ipextstats_list[] = {
134         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
135         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
136         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
137         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
138         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
139         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
140         SNMP_MIB_SENTINEL
141 };
142
143 static struct {
144         char *name;
145         int index;
146 } icmpmibmap[] = {
147         { "DestUnreachs", ICMP_DEST_UNREACH },
148         { "TimeExcds", ICMP_TIME_EXCEEDED },
149         { "ParmProbs", ICMP_PARAMETERPROB },
150         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
151         { "Redirects", ICMP_REDIRECT },
152         { "Echos", ICMP_ECHO },
153         { "EchoReps", ICMP_ECHOREPLY },
154         { "Timestamps", ICMP_TIMESTAMP },
155         { "TimestampReps", ICMP_TIMESTAMPREPLY },
156         { "AddrMasks", ICMP_ADDRESS },
157         { "AddrMaskReps", ICMP_ADDRESSREPLY },
158         { NULL, 0 }
159 };
160
161
162 static const struct snmp_mib snmp4_tcp_list[] = {
163         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
164         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
165         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
166         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
167         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
168         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
169         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
170         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
171         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
172         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
173         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
174         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
175         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
176         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
177         SNMP_MIB_SENTINEL
178 };
179
180 static const struct snmp_mib snmp4_udp_list[] = {
181         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
182         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
183         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
184         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
185         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
186         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
187         SNMP_MIB_SENTINEL
188 };
189
190 static const struct snmp_mib snmp4_net_list[] = {
191         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
192         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
193         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
194         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
195         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
196         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
197         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
198         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
199         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
200         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
201         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
202         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
203         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
204         SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
205         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
206         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
207         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
208         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
209         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
210         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
211         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
212         SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
213         SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
214         SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
215         SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
216         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
217         SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
218         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
219         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
220         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
221         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
222         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
223         SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
224         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
225         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
226         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
227         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
228         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
229         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
230         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
231         SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
232         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
233         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
234         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
235         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
236         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
237         SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
238         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
239         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
240         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
241         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
242         SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
243         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
244         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
245         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
246         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
247         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
248         SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
249         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
250         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
251         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
252         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
253         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
254         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
255         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
256         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
257         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
258         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
259         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
260         SNMP_MIB_SENTINEL
261 };
262
263 static void icmpmsg_put(struct seq_file *seq)
264 {
265 #define PERLINE 16
266
267         int j, i, count;
268         static int out[PERLINE];
269
270         count = 0;
271         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
272
273                 if (snmp_fold_field((void **) icmpmsg_statistics, i))
274                         out[count++] = i;
275                 if (count < PERLINE)
276                         continue;
277
278                 seq_printf(seq, "\nIcmpMsg:");
279                 for (j = 0; j < PERLINE; ++j)
280                         seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
281                                         i & 0xff);
282                 seq_printf(seq, "\nIcmpMsg: ");
283                 for (j = 0; j < PERLINE; ++j)
284                         seq_printf(seq, " %lu",
285                                 snmp_fold_field((void **) icmpmsg_statistics,
286                                 out[j]));
287                 seq_putc(seq, '\n');
288         }
289         if (count) {
290                 seq_printf(seq, "\nIcmpMsg:");
291                 for (j = 0; j < count; ++j)
292                         seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
293                                 "In", out[j] & 0xff);
294                 seq_printf(seq, "\nIcmpMsg:");
295                 for (j = 0; j < count; ++j)
296                         seq_printf(seq, " %lu", snmp_fold_field((void **)
297                                 icmpmsg_statistics, out[j]));
298         }
299
300 #undef PERLINE
301 }
302
303 static void icmp_put(struct seq_file *seq)
304 {
305         int i;
306
307         seq_puts(seq, "\nIcmp: InMsgs InErrors");
308         for (i=0; icmpmibmap[i].name != NULL; i++)
309                 seq_printf(seq, " In%s", icmpmibmap[i].name);
310         seq_printf(seq, " OutMsgs OutErrors");
311         for (i=0; icmpmibmap[i].name != NULL; i++)
312                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
313         seq_printf(seq, "\nIcmp: %lu %lu",
314                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
315                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
316         for (i=0; icmpmibmap[i].name != NULL; i++)
317                 seq_printf(seq, " %lu",
318                         snmp_fold_field((void **) icmpmsg_statistics,
319                                 icmpmibmap[i].index));
320         seq_printf(seq, " %lu %lu",
321                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
322                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
323         for (i=0; icmpmibmap[i].name != NULL; i++)
324                 seq_printf(seq, " %lu",
325                         snmp_fold_field((void **) icmpmsg_statistics,
326                                 icmpmibmap[i].index | 0x100));
327 }
328
329 /*
330  *      Called from the PROCfs module. This outputs /proc/net/snmp.
331  */
332 static int snmp_seq_show(struct seq_file *seq, void *v)
333 {
334         int i;
335
336         seq_puts(seq, "Ip: Forwarding DefaultTTL");
337
338         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
339                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
340
341         seq_printf(seq, "\nIp: %d %d",
342                    IPV4_DEVCONF_ALL(&init_net, FORWARDING) ? 1 : 2,
343                    sysctl_ip_default_ttl);
344
345         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
346                 seq_printf(seq, " %lu",
347                            snmp_fold_field((void **)init_net.mib.ip_statistics,
348                                            snmp4_ipstats_list[i].entry));
349
350         icmp_put(seq);  /* RFC 2011 compatibility */
351         icmpmsg_put(seq);
352
353         seq_puts(seq, "\nTcp:");
354         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
355                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
356
357         seq_puts(seq, "\nTcp:");
358         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
359                 /* MaxConn field is signed, RFC 2012 */
360                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
361                         seq_printf(seq, " %ld",
362                                    snmp_fold_field((void **)init_net.mib.tcp_statistics,
363                                                    snmp4_tcp_list[i].entry));
364                 else
365                         seq_printf(seq, " %lu",
366                                    snmp_fold_field((void **)init_net.mib.tcp_statistics,
367                                                    snmp4_tcp_list[i].entry));
368         }
369
370         seq_puts(seq, "\nUdp:");
371         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
372                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
373
374         seq_puts(seq, "\nUdp:");
375         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
376                 seq_printf(seq, " %lu",
377                            snmp_fold_field((void **)udp_statistics,
378                                            snmp4_udp_list[i].entry));
379
380         /* the UDP and UDP-Lite MIBs are the same */
381         seq_puts(seq, "\nUdpLite:");
382         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
383                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
384
385         seq_puts(seq, "\nUdpLite:");
386         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
387                 seq_printf(seq, " %lu",
388                            snmp_fold_field((void **)udplite_statistics,
389                                            snmp4_udp_list[i].entry));
390
391         seq_putc(seq, '\n');
392         return 0;
393 }
394
395 static int snmp_seq_open(struct inode *inode, struct file *file)
396 {
397         return single_open(file, snmp_seq_show, NULL);
398 }
399
400 static const struct file_operations snmp_seq_fops = {
401         .owner   = THIS_MODULE,
402         .open    = snmp_seq_open,
403         .read    = seq_read,
404         .llseek  = seq_lseek,
405         .release = single_release,
406 };
407
408
409
410 /*
411  *      Output /proc/net/netstat
412  */
413 static int netstat_seq_show(struct seq_file *seq, void *v)
414 {
415         int i;
416
417         seq_puts(seq, "TcpExt:");
418         for (i = 0; snmp4_net_list[i].name != NULL; i++)
419                 seq_printf(seq, " %s", snmp4_net_list[i].name);
420
421         seq_puts(seq, "\nTcpExt:");
422         for (i = 0; snmp4_net_list[i].name != NULL; i++)
423                 seq_printf(seq, " %lu",
424                            snmp_fold_field((void **)net_statistics,
425                                            snmp4_net_list[i].entry));
426
427         seq_puts(seq, "\nIpExt:");
428         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
429                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
430
431         seq_puts(seq, "\nIpExt:");
432         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
433                 seq_printf(seq, " %lu",
434                            snmp_fold_field((void **)init_net.mib.ip_statistics,
435                                            snmp4_ipextstats_list[i].entry));
436
437         seq_putc(seq, '\n');
438         return 0;
439 }
440
441 static int netstat_seq_open(struct inode *inode, struct file *file)
442 {
443         return single_open(file, netstat_seq_show, NULL);
444 }
445
446 static const struct file_operations netstat_seq_fops = {
447         .owner   = THIS_MODULE,
448         .open    = netstat_seq_open,
449         .read    = seq_read,
450         .llseek  = seq_lseek,
451         .release = single_release,
452 };
453
454 static __net_init int ip_proc_init_net(struct net *net)
455 {
456         if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
457                 return -ENOMEM;
458         return 0;
459 }
460
461 static __net_exit void ip_proc_exit_net(struct net *net)
462 {
463         proc_net_remove(net, "sockstat");
464 }
465
466 static __net_initdata struct pernet_operations ip_proc_ops = {
467         .init = ip_proc_init_net,
468         .exit = ip_proc_exit_net,
469 };
470
471 int __init ip_misc_proc_init(void)
472 {
473         int rc = 0;
474
475         if (register_pernet_subsys(&ip_proc_ops))
476                 goto out_pernet;
477
478         if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
479                 goto out_netstat;
480
481         if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
482                 goto out_snmp;
483 out:
484         return rc;
485 out_snmp:
486         proc_net_remove(&init_net, "netstat");
487 out_netstat:
488         unregister_pernet_subsys(&ip_proc_ops);
489 out_pernet:
490         rc = -ENOMEM;
491         goto out;
492 }
493