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Merge branch 'x86/rdrand' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
[wandboard.git] / net / ipv4 / proc.c
blob3569d8ecaeac55e546912729322f1b15160d2c0c
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 <linux/export.h>
46 #include <net/sock.h>
47 #include <net/raw.h>
48
49 /*
50 * Report socket allocation statistics [mea@utu.fi]
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("TCPLoss", LINUX_MIB_TCPLOSS),
220 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
221 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
222 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
223 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
224 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
225 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
226 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
227 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
228 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
229 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
230 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
231 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
232 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
233 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
234 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
235 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
236 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
237 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
238 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
239 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
240 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
241 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
242 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
243 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
244 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
245 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
246 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
247 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
248 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
249 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
250 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
251 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
252 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
253 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
254 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
255 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
256 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
257 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
258 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
259 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
260 SNMP_MIB_SENTINEL
261 };
262
263 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
264 unsigned short *type, int count)
265 {
266 int j;
267
268 if (count) {
269 seq_printf(seq, "\nIcmpMsg:");
270 for (j = 0; j < count; ++j)
271 seq_printf(seq, " %sType%u",
272 type[j] & 0x100 ? "Out" : "In",
273 type[j] & 0xff);
274 seq_printf(seq, "\nIcmpMsg:");
275 for (j = 0; j < count; ++j)
276 seq_printf(seq, " %lu", vals[j]);
277 }
278 }
279
280 static void icmpmsg_put(struct seq_file *seq)
281 {
282 #define PERLINE 16
283
284 int i, count;
285 unsigned short type[PERLINE];
286 unsigned long vals[PERLINE], val;
287 struct net *net = seq->private;
288
289 count = 0;
290 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
291 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
292 if (val) {
293 type[count] = i;
294 vals[count++] = val;
295 }
296 if (count == PERLINE) {
297 icmpmsg_put_line(seq, vals, type, count);
298 count = 0;
299 }
300 }
301 icmpmsg_put_line(seq, vals, type, count);
302
303 #undef PERLINE
304 }
305
306 static void icmp_put(struct seq_file *seq)
307 {
308 int i;
309 struct net *net = seq->private;
310 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
311
312 seq_puts(seq, "\nIcmp: InMsgs InErrors");
313 for (i=0; icmpmibmap[i].name != NULL; i++)
314 seq_printf(seq, " In%s", icmpmibmap[i].name);
315 seq_printf(seq, " OutMsgs OutErrors");
316 for (i=0; icmpmibmap[i].name != NULL; i++)
317 seq_printf(seq, " Out%s", icmpmibmap[i].name);
318 seq_printf(seq, "\nIcmp: %lu %lu",
319 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
320 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
321 for (i=0; icmpmibmap[i].name != NULL; i++)
322 seq_printf(seq, " %lu",
323 atomic_long_read(ptr + icmpmibmap[i].index));
324 seq_printf(seq, " %lu %lu",
325 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
326 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
327 for (i=0; icmpmibmap[i].name != NULL; i++)
328 seq_printf(seq, " %lu",
329 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
330 }
331
332 /*
333 * Called from the PROCfs module. This outputs /proc/net/snmp.
334 */
335 static int snmp_seq_show(struct seq_file *seq, void *v)
336 {
337 int i;
338 struct net *net = seq->private;
339
340 seq_puts(seq, "Ip: Forwarding DefaultTTL");
341
342 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
343 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
344
345 seq_printf(seq, "\nIp: %d %d",
346 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
347 sysctl_ip_default_ttl);
348
349 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
350 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
351 seq_printf(seq, " %llu",
352 snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
353 snmp4_ipstats_list[i].entry,
354 offsetof(struct ipstats_mib, syncp)));
355
356 icmp_put(seq); /* RFC 2011 compatibility */
357 icmpmsg_put(seq);
358
359 seq_puts(seq, "\nTcp:");
360 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
361 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
362
363 seq_puts(seq, "\nTcp:");
364 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
365 /* MaxConn field is signed, RFC 2012 */
366 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
367 seq_printf(seq, " %ld",
368 snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
369 snmp4_tcp_list[i].entry));
370 else
371 seq_printf(seq, " %lu",
372 snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
373 snmp4_tcp_list[i].entry));
374 }
375
376 seq_puts(seq, "\nUdp:");
377 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
378 seq_printf(seq, " %s", snmp4_udp_list[i].name);
379
380 seq_puts(seq, "\nUdp:");
381 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
382 seq_printf(seq, " %lu",
383 snmp_fold_field((void __percpu **)net->mib.udp_statistics,
384 snmp4_udp_list[i].entry));
385
386 /* the UDP and UDP-Lite MIBs are the same */
387 seq_puts(seq, "\nUdpLite:");
388 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
389 seq_printf(seq, " %s", snmp4_udp_list[i].name);
390
391 seq_puts(seq, "\nUdpLite:");
392 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
393 seq_printf(seq, " %lu",
394 snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
395 snmp4_udp_list[i].entry));
396
397 seq_putc(seq, '\n');
398 return 0;
399 }
400
401 static int snmp_seq_open(struct inode *inode, struct file *file)
402 {
403 return single_open_net(inode, file, snmp_seq_show);
404 }
405
406 static const struct file_operations snmp_seq_fops = {
407 .owner = THIS_MODULE,
408 .open = snmp_seq_open,
409 .read = seq_read,
410 .llseek = seq_lseek,
411 .release = single_release_net,
412 };
413
414
415
416 /*
417 * Output /proc/net/netstat
418 */
419 static int netstat_seq_show(struct seq_file *seq, void *v)
420 {
421 int i;
422 struct net *net = seq->private;
423
424 seq_puts(seq, "TcpExt:");
425 for (i = 0; snmp4_net_list[i].name != NULL; i++)
426 seq_printf(seq, " %s", snmp4_net_list[i].name);
427
428 seq_puts(seq, "\nTcpExt:");
429 for (i = 0; snmp4_net_list[i].name != NULL; i++)
430 seq_printf(seq, " %lu",
431 snmp_fold_field((void __percpu **)net->mib.net_statistics,
432 snmp4_net_list[i].entry));
433
434 seq_puts(seq, "\nIpExt:");
435 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
436 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
437
438 seq_puts(seq, "\nIpExt:");
439 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
440 seq_printf(seq, " %llu",
441 snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
442 snmp4_ipextstats_list[i].entry,
443 offsetof(struct ipstats_mib, syncp)));
444
445 seq_putc(seq, '\n');
446 return 0;
447 }
448
449 static int netstat_seq_open(struct inode *inode, struct file *file)
450 {
451 return single_open_net(inode, file, netstat_seq_show);
452 }
453
454 static const struct file_operations netstat_seq_fops = {
455 .owner = THIS_MODULE,
456 .open = netstat_seq_open,
457 .read = seq_read,
458 .llseek = seq_lseek,
459 .release = single_release_net,
460 };
461
462 static __net_init int ip_proc_init_net(struct net *net)
463 {
464 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
465 goto out_sockstat;
466 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
467 goto out_netstat;
468 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
469 goto out_snmp;
470
471 return 0;
472
473 out_snmp:
474 proc_net_remove(net, "netstat");
475 out_netstat:
476 proc_net_remove(net, "sockstat");
477 out_sockstat:
478 return -ENOMEM;
479 }
480
481 static __net_exit void ip_proc_exit_net(struct net *net)
482 {
483 proc_net_remove(net, "snmp");
484 proc_net_remove(net, "netstat");
485 proc_net_remove(net, "sockstat");
486 }
487
488 static __net_initdata struct pernet_operations ip_proc_ops = {
489 .init = ip_proc_init_net,
490 .exit = ip_proc_exit_net,
491 };
492
493 int __init ip_misc_proc_init(void)
494 {
495 return register_pernet_subsys(&ip_proc_ops);
496 }
497
WandBoard kernel