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.
6 * This file implements the various access functions for the
7 * PROC file system. It is mainly used for debugging and
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>
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
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.
34 #include <linux/types.h>
35 #include <net/net_namespace.h>
37 #include <net/protocol.h>
40 #include <net/udplite.h>
41 #include <linux/inetdevice.h>
42 #include <linux/proc_fs.h>
43 #include <linux/seq_file.h>
48 * Report socket allocation statistics [mea@utu.fi]
50 static int sockstat_seq_show(struct seq_file *seq, void *v)
52 struct net *net = seq->private;
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));
72 static int sockstat_seq_open(struct inode *inode, struct file *file)
74 return single_open_net(inode, file, sockstat_seq_show);
77 static const struct file_operations sockstat_seq_fops = {
79 .open = sockstat_seq_open,
82 .release = single_release_net,
86 static const struct snmp_mib snmp4_ipstats_list[] = {
87 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
88 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
89 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
90 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
91 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
92 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
93 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
94 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
95 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
96 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
97 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
98 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
99 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
100 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
101 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
102 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
103 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
107 /* Following RFC4293 items are displayed in /proc/net/netstat */
108 static const struct snmp_mib snmp4_ipextstats_list[] = {
109 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
110 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
111 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
112 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
113 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
114 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
122 { "DestUnreachs", ICMP_DEST_UNREACH },
123 { "TimeExcds", ICMP_TIME_EXCEEDED },
124 { "ParmProbs", ICMP_PARAMETERPROB },
125 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
126 { "Redirects", ICMP_REDIRECT },
127 { "Echos", ICMP_ECHO },
128 { "EchoReps", ICMP_ECHOREPLY },
129 { "Timestamps", ICMP_TIMESTAMP },
130 { "TimestampReps", ICMP_TIMESTAMPREPLY },
131 { "AddrMasks", ICMP_ADDRESS },
132 { "AddrMaskReps", ICMP_ADDRESSREPLY },
137 static const struct snmp_mib snmp4_tcp_list[] = {
138 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
139 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
140 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
141 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
142 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
143 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
144 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
145 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
146 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
147 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
148 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
149 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
150 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
151 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
155 static const struct snmp_mib snmp4_udp_list[] = {
156 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
157 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
158 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
159 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
160 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
161 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
165 static const struct snmp_mib snmp4_net_list[] = {
166 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
167 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
168 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
169 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
170 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
171 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
172 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
173 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
174 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
175 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
176 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
177 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
178 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
179 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
180 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
181 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
182 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
183 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
184 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
185 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
186 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
187 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
188 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
189 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
190 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
191 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
192 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
193 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
194 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
195 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
196 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
197 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
198 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
199 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
200 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
201 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
202 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
203 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
204 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
205 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
206 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
207 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
208 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
209 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
210 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
211 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
212 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
213 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
214 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
215 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
216 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
217 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
218 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
219 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
220 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
221 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
222 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
223 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
224 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
225 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
226 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
227 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
228 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
229 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
230 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
231 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
232 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
233 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
234 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
235 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
236 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
240 static void icmpmsg_put(struct seq_file *seq)
245 static int out[PERLINE];
246 struct net *net = seq->private;
249 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
251 if (snmp_fold_field((void **) net->mib.icmpmsg_statistics, i))
256 seq_printf(seq, "\nIcmpMsg:");
257 for (j = 0; j < PERLINE; ++j)
258 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
260 seq_printf(seq, "\nIcmpMsg: ");
261 for (j = 0; j < PERLINE; ++j)
262 seq_printf(seq, " %lu",
263 snmp_fold_field((void **) net->mib.icmpmsg_statistics,
268 seq_printf(seq, "\nIcmpMsg:");
269 for (j = 0; j < count; ++j)
270 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
271 "In", out[j] & 0xff);
272 seq_printf(seq, "\nIcmpMsg:");
273 for (j = 0; j < count; ++j)
274 seq_printf(seq, " %lu", snmp_fold_field((void **)
275 net->mib.icmpmsg_statistics, out[j]));
281 static void icmp_put(struct seq_file *seq)
284 struct net *net = seq->private;
286 seq_puts(seq, "\nIcmp: InMsgs InErrors");
287 for (i=0; icmpmibmap[i].name != NULL; i++)
288 seq_printf(seq, " In%s", icmpmibmap[i].name);
289 seq_printf(seq, " OutMsgs OutErrors");
290 for (i=0; icmpmibmap[i].name != NULL; i++)
291 seq_printf(seq, " Out%s", icmpmibmap[i].name);
292 seq_printf(seq, "\nIcmp: %lu %lu",
293 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
294 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
295 for (i=0; icmpmibmap[i].name != NULL; i++)
296 seq_printf(seq, " %lu",
297 snmp_fold_field((void **) net->mib.icmpmsg_statistics,
298 icmpmibmap[i].index));
299 seq_printf(seq, " %lu %lu",
300 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
301 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
302 for (i=0; icmpmibmap[i].name != NULL; i++)
303 seq_printf(seq, " %lu",
304 snmp_fold_field((void **) net->mib.icmpmsg_statistics,
305 icmpmibmap[i].index | 0x100));
309 * Called from the PROCfs module. This outputs /proc/net/snmp.
311 static int snmp_seq_show(struct seq_file *seq, void *v)
314 struct net *net = seq->private;
316 seq_puts(seq, "Ip: Forwarding DefaultTTL");
318 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
319 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
321 seq_printf(seq, "\nIp: %d %d",
322 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
323 sysctl_ip_default_ttl);
325 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
326 seq_printf(seq, " %lu",
327 snmp_fold_field((void **)net->mib.ip_statistics,
328 snmp4_ipstats_list[i].entry));
330 icmp_put(seq); /* RFC 2011 compatibility */
333 seq_puts(seq, "\nTcp:");
334 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
335 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
337 seq_puts(seq, "\nTcp:");
338 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
339 /* MaxConn field is signed, RFC 2012 */
340 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
341 seq_printf(seq, " %ld",
342 snmp_fold_field((void **)net->mib.tcp_statistics,
343 snmp4_tcp_list[i].entry));
345 seq_printf(seq, " %lu",
346 snmp_fold_field((void **)net->mib.tcp_statistics,
347 snmp4_tcp_list[i].entry));
350 seq_puts(seq, "\nUdp:");
351 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
352 seq_printf(seq, " %s", snmp4_udp_list[i].name);
354 seq_puts(seq, "\nUdp:");
355 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
356 seq_printf(seq, " %lu",
357 snmp_fold_field((void **)net->mib.udp_statistics,
358 snmp4_udp_list[i].entry));
360 /* the UDP and UDP-Lite MIBs are the same */
361 seq_puts(seq, "\nUdpLite:");
362 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
363 seq_printf(seq, " %s", snmp4_udp_list[i].name);
365 seq_puts(seq, "\nUdpLite:");
366 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
367 seq_printf(seq, " %lu",
368 snmp_fold_field((void **)net->mib.udplite_statistics,
369 snmp4_udp_list[i].entry));
375 static int snmp_seq_open(struct inode *inode, struct file *file)
377 return single_open_net(inode, file, snmp_seq_show);
380 static const struct file_operations snmp_seq_fops = {
381 .owner = THIS_MODULE,
382 .open = snmp_seq_open,
385 .release = single_release_net,
391 * Output /proc/net/netstat
393 static int netstat_seq_show(struct seq_file *seq, void *v)
396 struct net *net = seq->private;
398 seq_puts(seq, "TcpExt:");
399 for (i = 0; snmp4_net_list[i].name != NULL; i++)
400 seq_printf(seq, " %s", snmp4_net_list[i].name);
402 seq_puts(seq, "\nTcpExt:");
403 for (i = 0; snmp4_net_list[i].name != NULL; i++)
404 seq_printf(seq, " %lu",
405 snmp_fold_field((void **)net->mib.net_statistics,
406 snmp4_net_list[i].entry));
408 seq_puts(seq, "\nIpExt:");
409 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
410 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
412 seq_puts(seq, "\nIpExt:");
413 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
414 seq_printf(seq, " %lu",
415 snmp_fold_field((void **)net->mib.ip_statistics,
416 snmp4_ipextstats_list[i].entry));
422 static int netstat_seq_open(struct inode *inode, struct file *file)
424 return single_open_net(inode, file, netstat_seq_show);
427 static const struct file_operations netstat_seq_fops = {
428 .owner = THIS_MODULE,
429 .open = netstat_seq_open,
432 .release = single_release_net,
435 static __net_init int ip_proc_init_net(struct net *net)
437 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
439 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
441 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
447 proc_net_remove(net, "netstat");
449 proc_net_remove(net, "sockstat");
454 static __net_exit void ip_proc_exit_net(struct net *net)
456 proc_net_remove(net, "snmp");
457 proc_net_remove(net, "netstat");
458 proc_net_remove(net, "sockstat");
461 static __net_initdata struct pernet_operations ip_proc_ops = {
462 .init = ip_proc_init_net,
463 .exit = ip_proc_exit_net,
466 int __init ip_misc_proc_init(void)
468 return register_pernet_subsys(&ip_proc_ops);