inet: Fix __inet_inherit_port() to correctly increment bsockets and num_owners
[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  * 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/bottom_half.h>
42 #include <linux/inetdevice.h>
43 #include <linux/proc_fs.h>
44 #include <linux/seq_file.h>
45 #include <net/sock.h>
46 #include <net/raw.h>
47
48 /*
49  *      Report socket allocation statistics [mea@utu.fi]
50  */
51 static int sockstat_seq_show(struct seq_file *seq, void *v)
52 {
53         struct net *net = seq->private;
54         int orphans, sockets;
55
56         local_bh_disable();
57         orphans = percpu_counter_sum_positive(&tcp_orphan_count);
58         sockets = percpu_counter_sum_positive(&tcp_sockets_allocated);
59         local_bh_enable();
60
61         socket_seq_show(seq);
62         seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
63                    sock_prot_inuse_get(net, &tcp_prot), orphans,
64                    tcp_death_row.tw_count, sockets,
65                    atomic_long_read(&tcp_memory_allocated));
66         seq_printf(seq, "UDP: inuse %d mem %ld\n",
67                    sock_prot_inuse_get(net, &udp_prot),
68                    atomic_long_read(&udp_memory_allocated));
69         seq_printf(seq, "UDPLITE: inuse %d\n",
70                    sock_prot_inuse_get(net, &udplite_prot));
71         seq_printf(seq, "RAW: inuse %d\n",
72                    sock_prot_inuse_get(net, &raw_prot));
73         seq_printf(seq,  "FRAG: inuse %d memory %d\n",
74                         ip_frag_nqueues(net), ip_frag_mem(net));
75         return 0;
76 }
77
78 static int sockstat_seq_open(struct inode *inode, struct file *file)
79 {
80         return single_open_net(inode, file, sockstat_seq_show);
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_net,
89 };
90
91 /* snmp items */
92 static const struct snmp_mib snmp4_ipstats_list[] = {
93         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
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_OUTPKTS),
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_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
122         SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
123         SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
124         SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
125         SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
126         SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
127         SNMP_MIB_SENTINEL
128 };
129
130 static const struct {
131         const char *name;
132         int index;
133 } icmpmibmap[] = {
134         { "DestUnreachs", ICMP_DEST_UNREACH },
135         { "TimeExcds", ICMP_TIME_EXCEEDED },
136         { "ParmProbs", ICMP_PARAMETERPROB },
137         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
138         { "Redirects", ICMP_REDIRECT },
139         { "Echos", ICMP_ECHO },
140         { "EchoReps", ICMP_ECHOREPLY },
141         { "Timestamps", ICMP_TIMESTAMP },
142         { "TimestampReps", ICMP_TIMESTAMPREPLY },
143         { "AddrMasks", ICMP_ADDRESS },
144         { "AddrMaskReps", ICMP_ADDRESSREPLY },
145         { NULL, 0 }
146 };
147
148
149 static const struct snmp_mib snmp4_tcp_list[] = {
150         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
151         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
152         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
153         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
154         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
155         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
156         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
157         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
158         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
159         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
160         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
161         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
162         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
163         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
164         SNMP_MIB_SENTINEL
165 };
166
167 static const struct snmp_mib snmp4_udp_list[] = {
168         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
169         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
170         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
171         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
172         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
173         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
174         SNMP_MIB_SENTINEL
175 };
176
177 static const struct snmp_mib snmp4_net_list[] = {
178         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
179         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
180         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
181         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
182         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
183         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
184         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
185         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
186         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
187         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
188         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
189         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
190         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
191         SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
192         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
193         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
194         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
195         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
196         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
197         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
198         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
199         SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
200         SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
201         SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
202         SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
203         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
204         SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
205         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
206         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
207         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
208         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
209         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
210         SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
211         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
212         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
213         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
214         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
215         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
216         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
217         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
218         SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
219         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
220         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
221         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
222         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
223         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
224         SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
225         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
226         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
227         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
228         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
229         SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
230         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
231         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
232         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
233         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
234         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
235         SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
236         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
237         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
238         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
239         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
240         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
241         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
242         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
243         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
244         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
245         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
246         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
247         SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
248         SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
249         SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
250         SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
251         SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
252         SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
253         SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
254         SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
255         SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
256         SNMP_MIB_SENTINEL
257 };
258
259 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
260                              unsigned short *type, int count)
261 {
262         int j;
263
264         if (count) {
265                 seq_printf(seq, "\nIcmpMsg:");
266                 for (j = 0; j < count; ++j)
267                         seq_printf(seq, " %sType%u",
268                                 type[j] & 0x100 ? "Out" : "In",
269                                 type[j] & 0xff);
270                 seq_printf(seq, "\nIcmpMsg:");
271                 for (j = 0; j < count; ++j)
272                         seq_printf(seq, " %lu", vals[j]);
273         }
274 }
275
276 static void icmpmsg_put(struct seq_file *seq)
277 {
278 #define PERLINE 16
279
280         int i, count;
281         unsigned short type[PERLINE];
282         unsigned long vals[PERLINE], val;
283         struct net *net = seq->private;
284
285         count = 0;
286         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
287                 val = snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, i);
288                 if (val) {
289                         type[count] = i;
290                         vals[count++] = val;
291                 }
292                 if (count == PERLINE) {
293                         icmpmsg_put_line(seq, vals, type, count);
294                         count = 0;
295                 }
296         }
297         icmpmsg_put_line(seq, vals, type, count);
298
299 #undef PERLINE
300 }
301
302 static void icmp_put(struct seq_file *seq)
303 {
304         int i;
305         struct net *net = seq->private;
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 __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
315                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
316         for (i=0; icmpmibmap[i].name != NULL; i++)
317                 seq_printf(seq, " %lu",
318                         snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
319                                 icmpmibmap[i].index));
320         seq_printf(seq, " %lu %lu",
321                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
322                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
323         for (i=0; icmpmibmap[i].name != NULL; i++)
324                 seq_printf(seq, " %lu",
325                         snmp_fold_field((void __percpu **) net->mib.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         struct net *net = seq->private;
336
337         seq_puts(seq, "Ip: Forwarding DefaultTTL");
338
339         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
340                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
341
342         seq_printf(seq, "\nIp: %d %d",
343                    IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
344                    sysctl_ip_default_ttl);
345
346         BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
347         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
348                 seq_printf(seq, " %llu",
349                            snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
350                                              snmp4_ipstats_list[i].entry,
351                                              offsetof(struct ipstats_mib, syncp)));
352
353         icmp_put(seq);  /* RFC 2011 compatibility */
354         icmpmsg_put(seq);
355
356         seq_puts(seq, "\nTcp:");
357         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
358                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
359
360         seq_puts(seq, "\nTcp:");
361         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
362                 /* MaxConn field is signed, RFC 2012 */
363                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
364                         seq_printf(seq, " %ld",
365                                    snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
366                                                    snmp4_tcp_list[i].entry));
367                 else
368                         seq_printf(seq, " %lu",
369                                    snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
370                                                    snmp4_tcp_list[i].entry));
371         }
372
373         seq_puts(seq, "\nUdp:");
374         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
375                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
376
377         seq_puts(seq, "\nUdp:");
378         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
379                 seq_printf(seq, " %lu",
380                            snmp_fold_field((void __percpu **)net->mib.udp_statistics,
381                                            snmp4_udp_list[i].entry));
382
383         /* the UDP and UDP-Lite MIBs are the same */
384         seq_puts(seq, "\nUdpLite:");
385         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
386                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
387
388         seq_puts(seq, "\nUdpLite:");
389         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
390                 seq_printf(seq, " %lu",
391                            snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
392                                            snmp4_udp_list[i].entry));
393
394         seq_putc(seq, '\n');
395         return 0;
396 }
397
398 static int snmp_seq_open(struct inode *inode, struct file *file)
399 {
400         return single_open_net(inode, file, snmp_seq_show);
401 }
402
403 static const struct file_operations snmp_seq_fops = {
404         .owner   = THIS_MODULE,
405         .open    = snmp_seq_open,
406         .read    = seq_read,
407         .llseek  = seq_lseek,
408         .release = single_release_net,
409 };
410
411
412
413 /*
414  *      Output /proc/net/netstat
415  */
416 static int netstat_seq_show(struct seq_file *seq, void *v)
417 {
418         int i;
419         struct net *net = seq->private;
420
421         seq_puts(seq, "TcpExt:");
422         for (i = 0; snmp4_net_list[i].name != NULL; i++)
423                 seq_printf(seq, " %s", snmp4_net_list[i].name);
424
425         seq_puts(seq, "\nTcpExt:");
426         for (i = 0; snmp4_net_list[i].name != NULL; i++)
427                 seq_printf(seq, " %lu",
428                            snmp_fold_field((void __percpu **)net->mib.net_statistics,
429                                            snmp4_net_list[i].entry));
430
431         seq_puts(seq, "\nIpExt:");
432         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
433                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
434
435         seq_puts(seq, "\nIpExt:");
436         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
437                 seq_printf(seq, " %llu",
438                            snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
439                                              snmp4_ipextstats_list[i].entry,
440                                              offsetof(struct ipstats_mib, syncp)));
441
442         seq_putc(seq, '\n');
443         return 0;
444 }
445
446 static int netstat_seq_open(struct inode *inode, struct file *file)
447 {
448         return single_open_net(inode, file, netstat_seq_show);
449 }
450
451 static const struct file_operations netstat_seq_fops = {
452         .owner   = THIS_MODULE,
453         .open    = netstat_seq_open,
454         .read    = seq_read,
455         .llseek  = seq_lseek,
456         .release = single_release_net,
457 };
458
459 static __net_init int ip_proc_init_net(struct net *net)
460 {
461         if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
462                 goto out_sockstat;
463         if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
464                 goto out_netstat;
465         if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
466                 goto out_snmp;
467
468         return 0;
469
470 out_snmp:
471         proc_net_remove(net, "netstat");
472 out_netstat:
473         proc_net_remove(net, "sockstat");
474 out_sockstat:
475         return -ENOMEM;
476 }
477
478 static __net_exit void ip_proc_exit_net(struct net *net)
479 {
480         proc_net_remove(net, "snmp");
481         proc_net_remove(net, "netstat");
482         proc_net_remove(net, "sockstat");
483 }
484
485 static __net_initdata struct pernet_operations ip_proc_ops = {
486         .init = ip_proc_init_net,
487         .exit = ip_proc_exit_net,
488 };
489
490 int __init ip_misc_proc_init(void)
491 {
492         return register_pernet_subsys(&ip_proc_ops);
493 }
494