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proc.c
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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, <[email protected]>
11  * Gerald J. Heim, <[email protected]>
12  * Fred Baumgarten, <[email protected]>
13  * Erik Schoenfelder, <[email protected]>
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 <linux/export.h>
46 #include <net/sock.h>
47 #include <net/raw.h>
48 
49 /*
50  * Report socket allocation statistics [[email protected]]
51  */
52 static int sockstat_seq_show(struct seq_file *seq, void *v)
53 {
54  struct net *net = seq->private;
55  int orphans, sockets;
56 
57  local_bh_disable();
58  orphans = percpu_counter_sum_positive(&tcp_orphan_count);
59  sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
60  local_bh_enable();
61 
62  socket_seq_show(seq);
63  seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
64  sock_prot_inuse_get(net, &tcp_prot), orphans,
65  tcp_death_row.tw_count, sockets,
66  proto_memory_allocated(&tcp_prot));
67  seq_printf(seq, "UDP: inuse %d mem %ld\n",
68  sock_prot_inuse_get(net, &udp_prot),
69  proto_memory_allocated(&udp_prot));
70  seq_printf(seq, "UDPLITE: inuse %d\n",
71  sock_prot_inuse_get(net, &udplite_prot));
72  seq_printf(seq, "RAW: inuse %d\n",
73  sock_prot_inuse_get(net, &raw_prot));
74  seq_printf(seq, "FRAG: inuse %d memory %d\n",
75  ip_frag_nqueues(net), ip_frag_mem(net));
76  return 0;
77 }
78 
79 static int sockstat_seq_open(struct inode *inode, struct file *file)
80 {
81  return single_open_net(inode, file, sockstat_seq_show);
82 }
83 
84 static const struct file_operations sockstat_seq_fops = {
85  .owner = THIS_MODULE,
86  .open = sockstat_seq_open,
87  .read = seq_read,
88  .llseek = seq_lseek,
89  .release = single_release_net,
90 };
91 
92 /* snmp items */
93 static const struct snmp_mib snmp4_ipstats_list[] = {
94  SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
95  SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
96  SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
97  SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
98  SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
99  SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
100  SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
101  SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
102  SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
103  SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
104  SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
105  SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
106  SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
107  SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
108  SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
109  SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
110  SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
111  SNMP_MIB_SENTINEL
112 };
113 
114 /* Following RFC4293 items are displayed in /proc/net/netstat */
115 static const struct snmp_mib snmp4_ipextstats_list[] = {
116  SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
117  SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
118  SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
119  SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
120  SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
121  SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
122  SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
123  SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
124  SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
125  SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
126  SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
127  SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
128  SNMP_MIB_SENTINEL
129 };
130 
131 static const struct {
132  const char *name;
133  int index;
134 } icmpmibmap[] = {
135  { "DestUnreachs", ICMP_DEST_UNREACH },
136  { "TimeExcds", ICMP_TIME_EXCEEDED },
137  { "ParmProbs", ICMP_PARAMETERPROB },
138  { "SrcQuenchs", ICMP_SOURCE_QUENCH },
139  { "Redirects", ICMP_REDIRECT },
140  { "Echos", ICMP_ECHO },
141  { "EchoReps", ICMP_ECHOREPLY },
142  { "Timestamps", ICMP_TIMESTAMP },
143  { "TimestampReps", ICMP_TIMESTAMPREPLY },
144  { "AddrMasks", ICMP_ADDRESS },
145  { "AddrMaskReps", ICMP_ADDRESSREPLY },
146  { NULL, 0 }
147 };
148 
149 
150 static const struct snmp_mib snmp4_tcp_list[] = {
151  SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
152  SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
153  SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
154  SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
155  SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
156  SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
157  SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
158  SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
159  SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
160  SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
161  SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
162  SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
163  SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
164  SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
165  SNMP_MIB_SENTINEL
166 };
167 
168 static const struct snmp_mib snmp4_udp_list[] = {
169  SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
170  SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
171  SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
172  SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
173  SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
174  SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
175  SNMP_MIB_SENTINEL
176 };
177 
178 static const struct snmp_mib snmp4_net_list[] = {
179  SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
180  SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
181  SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
182  SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
183  SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
184  SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
185  SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
186  SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
187  SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
188  SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
189  SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
190  SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
191  SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
192  SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
193  SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
194  SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
195  SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
196  SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
197  SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
198  SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
199  SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
200  SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
201  SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
202  SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
203  SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
204  SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
205  SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
206  SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
207  SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
208  SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
209  SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
210  SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
211  SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
212  SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
213  SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
214  SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
215  SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
216  SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
217  SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
218  SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
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("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
236  SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
237  SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
238  SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
239  SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
240  SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
241  SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
242  SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
243  SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
244  SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
245  SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
246  SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
247  SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
248  SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
249  SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
250  SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
251  SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
252  SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
253  SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
254  SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
255  SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
256  SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
257  SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
258  SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
259  SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
260  SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
261  SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
262  SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
263  SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
264  SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
265  SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
266  SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
267  SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
268  SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
269  SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
270  SNMP_MIB_SENTINEL
271 };
272 
273 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
274  unsigned short *type, int count)
275 {
276  int j;
277 
278  if (count) {
279  seq_printf(seq, "\nIcmpMsg:");
280  for (j = 0; j < count; ++j)
281  seq_printf(seq, " %sType%u",
282  type[j] & 0x100 ? "Out" : "In",
283  type[j] & 0xff);
284  seq_printf(seq, "\nIcmpMsg:");
285  for (j = 0; j < count; ++j)
286  seq_printf(seq, " %lu", vals[j]);
287  }
288 }
289 
290 static void icmpmsg_put(struct seq_file *seq)
291 {
292 #define PERLINE 16
293 
294  int i, count;
295  unsigned short type[PERLINE];
296  unsigned long vals[PERLINE], val;
297  struct net *net = seq->private;
298 
299  count = 0;
300  for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
301  val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
302  if (val) {
303  type[count] = i;
304  vals[count++] = val;
305  }
306  if (count == PERLINE) {
307  icmpmsg_put_line(seq, vals, type, count);
308  count = 0;
309  }
310  }
311  icmpmsg_put_line(seq, vals, type, count);
312 
313 #undef PERLINE
314 }
315 
316 static void icmp_put(struct seq_file *seq)
317 {
318  int i;
319  struct net *net = seq->private;
320  atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
321 
322  seq_puts(seq, "\nIcmp: InMsgs InErrors");
323  for (i=0; icmpmibmap[i].name != NULL; i++)
324  seq_printf(seq, " In%s", icmpmibmap[i].name);
325  seq_printf(seq, " OutMsgs OutErrors");
326  for (i=0; icmpmibmap[i].name != NULL; i++)
327  seq_printf(seq, " Out%s", icmpmibmap[i].name);
328  seq_printf(seq, "\nIcmp: %lu %lu",
329  snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
330  snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
331  for (i=0; icmpmibmap[i].name != NULL; i++)
332  seq_printf(seq, " %lu",
333  atomic_long_read(ptr + icmpmibmap[i].index));
334  seq_printf(seq, " %lu %lu",
335  snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
336  snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
337  for (i=0; icmpmibmap[i].name != NULL; i++)
338  seq_printf(seq, " %lu",
339  atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
340 }
341 
342 /*
343  * Called from the PROCfs module. This outputs /proc/net/snmp.
344  */
345 static int snmp_seq_show(struct seq_file *seq, void *v)
346 {
347  int i;
348  struct net *net = seq->private;
349 
350  seq_puts(seq, "Ip: Forwarding DefaultTTL");
351 
352  for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
353  seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
354 
355  seq_printf(seq, "\nIp: %d %d",
356  IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
357  sysctl_ip_default_ttl);
358 
359  BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
360  for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
361  seq_printf(seq, " %llu",
362  snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
363  snmp4_ipstats_list[i].entry,
364  offsetof(struct ipstats_mib, syncp)));
365 
366  icmp_put(seq); /* RFC 2011 compatibility */
367  icmpmsg_put(seq);
368 
369  seq_puts(seq, "\nTcp:");
370  for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
371  seq_printf(seq, " %s", snmp4_tcp_list[i].name);
372 
373  seq_puts(seq, "\nTcp:");
374  for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
375  /* MaxConn field is signed, RFC 2012 */
376  if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
377  seq_printf(seq, " %ld",
378  snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
379  snmp4_tcp_list[i].entry));
380  else
381  seq_printf(seq, " %lu",
382  snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
383  snmp4_tcp_list[i].entry));
384  }
385 
386  seq_puts(seq, "\nUdp:");
387  for (i = 0; snmp4_udp_list[i].name != NULL; i++)
388  seq_printf(seq, " %s", snmp4_udp_list[i].name);
389 
390  seq_puts(seq, "\nUdp:");
391  for (i = 0; snmp4_udp_list[i].name != NULL; i++)
392  seq_printf(seq, " %lu",
393  snmp_fold_field((void __percpu **)net->mib.udp_statistics,
394  snmp4_udp_list[i].entry));
395 
396  /* the UDP and UDP-Lite MIBs are the same */
397  seq_puts(seq, "\nUdpLite:");
398  for (i = 0; snmp4_udp_list[i].name != NULL; i++)
399  seq_printf(seq, " %s", snmp4_udp_list[i].name);
400 
401  seq_puts(seq, "\nUdpLite:");
402  for (i = 0; snmp4_udp_list[i].name != NULL; i++)
403  seq_printf(seq, " %lu",
404  snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
405  snmp4_udp_list[i].entry));
406 
407  seq_putc(seq, '\n');
408  return 0;
409 }
410 
411 static int snmp_seq_open(struct inode *inode, struct file *file)
412 {
413  return single_open_net(inode, file, snmp_seq_show);
414 }
415 
416 static const struct file_operations snmp_seq_fops = {
417  .owner = THIS_MODULE,
418  .open = snmp_seq_open,
419  .read = seq_read,
420  .llseek = seq_lseek,
421  .release = single_release_net,
422 };
423 
424 
425 
426 /*
427  * Output /proc/net/netstat
428  */
429 static int netstat_seq_show(struct seq_file *seq, void *v)
430 {
431  int i;
432  struct net *net = seq->private;
433 
434  seq_puts(seq, "TcpExt:");
435  for (i = 0; snmp4_net_list[i].name != NULL; i++)
436  seq_printf(seq, " %s", snmp4_net_list[i].name);
437 
438  seq_puts(seq, "\nTcpExt:");
439  for (i = 0; snmp4_net_list[i].name != NULL; i++)
440  seq_printf(seq, " %lu",
441  snmp_fold_field((void __percpu **)net->mib.net_statistics,
442  snmp4_net_list[i].entry));
443 
444  seq_puts(seq, "\nIpExt:");
445  for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
446  seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
447 
448  seq_puts(seq, "\nIpExt:");
449  for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
450  seq_printf(seq, " %llu",
451  snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
452  snmp4_ipextstats_list[i].entry,
453  offsetof(struct ipstats_mib, syncp)));
454 
455  seq_putc(seq, '\n');
456  return 0;
457 }
458 
459 static int netstat_seq_open(struct inode *inode, struct file *file)
460 {
461  return single_open_net(inode, file, netstat_seq_show);
462 }
463 
464 static const struct file_operations netstat_seq_fops = {
465  .owner = THIS_MODULE,
466  .open = netstat_seq_open,
467  .read = seq_read,
468  .llseek = seq_lseek,
469  .release = single_release_net,
470 };
471 
472 static __net_init int ip_proc_init_net(struct net *net)
473 {
474  if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
475  goto out_sockstat;
476  if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
477  goto out_netstat;
478  if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
479  goto out_snmp;
480 
481  return 0;
482 
483 out_snmp:
484  proc_net_remove(net, "netstat");
485 out_netstat:
486  proc_net_remove(net, "sockstat");
487 out_sockstat:
488  return -ENOMEM;
489 }
490 
491 static __net_exit void ip_proc_exit_net(struct net *net)
492 {
493  proc_net_remove(net, "snmp");
494  proc_net_remove(net, "netstat");
495  proc_net_remove(net, "sockstat");
496 }
497 
498 static __net_initdata struct pernet_operations ip_proc_ops = {
499  .init = ip_proc_init_net,
500  .exit = ip_proc_exit_net,
501 };
502 
503 int __init ip_misc_proc_init(void)
504 {
505  return register_pernet_subsys(&ip_proc_ops);
506 }
507 
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