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staging: brcm80211: cleanup of transmit buffer size related wrapper function
[zen-stable.git] / net / ipv4 / proc.c
blobb14ec7d03b6e70b9a5a1823261ac18cb40462035
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_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
257 SNMP_MIB_SENTINEL
258 };
259
260 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
261 unsigned short *type, int count)
262 {
263 int j;
264
265 if (count) {
266 seq_printf(seq, "\nIcmpMsg:");
267 for (j = 0; j < count; ++j)
268 seq_printf(seq, " %sType%u",
269 type[j] & 0x100 ? "Out" : "In",
270 type[j] & 0xff);
271 seq_printf(seq, "\nIcmpMsg:");
272 for (j = 0; j < count; ++j)
273 seq_printf(seq, " %lu", vals[j]);
274 }
275 }
276
277 static void icmpmsg_put(struct seq_file *seq)
278 {
279 #define PERLINE 16
280
281 int i, count;
282 unsigned short type[PERLINE];
283 unsigned long vals[PERLINE], val;
284 struct net *net = seq->private;
285
286 count = 0;
287 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
288 val = snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, i);
289 if (val) {
290 type[count] = i;
291 vals[count++] = val;
292 }
293 if (count == PERLINE) {
294 icmpmsg_put_line(seq, vals, type, count);
295 count = 0;
296 }
297 }
298 icmpmsg_put_line(seq, vals, type, count);
299
300 #undef PERLINE
301 }
302
303 static void icmp_put(struct seq_file *seq)
304 {
305 int i;
306 struct net *net = seq->private;
307
308 seq_puts(seq, "\nIcmp: InMsgs InErrors");
309 for (i=0; icmpmibmap[i].name != NULL; i++)
310 seq_printf(seq, " In%s", icmpmibmap[i].name);
311 seq_printf(seq, " OutMsgs OutErrors");
312 for (i=0; icmpmibmap[i].name != NULL; i++)
313 seq_printf(seq, " Out%s", icmpmibmap[i].name);
314 seq_printf(seq, "\nIcmp: %lu %lu",
315 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
316 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
317 for (i=0; icmpmibmap[i].name != NULL; i++)
318 seq_printf(seq, " %lu",
319 snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
320 icmpmibmap[i].index));
321 seq_printf(seq, " %lu %lu",
322 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
323 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
324 for (i=0; icmpmibmap[i].name != NULL; i++)
325 seq_printf(seq, " %lu",
326 snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
327 icmpmibmap[i].index | 0x100));
328 }
329
330 /*
331 * Called from the PROCfs module. This outputs /proc/net/snmp.
332 */
333 static int snmp_seq_show(struct seq_file *seq, void *v)
334 {
335 int i;
336 struct net *net = seq->private;
337
338 seq_puts(seq, "Ip: Forwarding DefaultTTL");
339
340 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
341 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
342
343 seq_printf(seq, "\nIp: %d %d",
344 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
345 sysctl_ip_default_ttl);
346
347 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
348 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
349 seq_printf(seq, " %llu",
350 snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
351 snmp4_ipstats_list[i].entry,
352 offsetof(struct ipstats_mib, syncp)));
353
354 icmp_put(seq); /* RFC 2011 compatibility */
355 icmpmsg_put(seq);
356
357 seq_puts(seq, "\nTcp:");
358 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
359 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
360
361 seq_puts(seq, "\nTcp:");
362 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
363 /* MaxConn field is signed, RFC 2012 */
364 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
365 seq_printf(seq, " %ld",
366 snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
367 snmp4_tcp_list[i].entry));
368 else
369 seq_printf(seq, " %lu",
370 snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
371 snmp4_tcp_list[i].entry));
372 }
373
374 seq_puts(seq, "\nUdp:");
375 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
376 seq_printf(seq, " %s", snmp4_udp_list[i].name);
377
378 seq_puts(seq, "\nUdp:");
379 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
380 seq_printf(seq, " %lu",
381 snmp_fold_field((void __percpu **)net->mib.udp_statistics,
382 snmp4_udp_list[i].entry));
383
384 /* the UDP and UDP-Lite MIBs are the same */
385 seq_puts(seq, "\nUdpLite:");
386 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
387 seq_printf(seq, " %s", snmp4_udp_list[i].name);
388
389 seq_puts(seq, "\nUdpLite:");
390 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
391 seq_printf(seq, " %lu",
392 snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
393 snmp4_udp_list[i].entry));
394
395 seq_putc(seq, '\n');
396 return 0;
397 }
398
399 static int snmp_seq_open(struct inode *inode, struct file *file)
400 {
401 return single_open_net(inode, file, snmp_seq_show);
402 }
403
404 static const struct file_operations snmp_seq_fops = {
405 .owner = THIS_MODULE,
406 .open = snmp_seq_open,
407 .read = seq_read,
408 .llseek = seq_lseek,
409 .release = single_release_net,
410 };
411
412
413
414 /*
415 * Output /proc/net/netstat
416 */
417 static int netstat_seq_show(struct seq_file *seq, void *v)
418 {
419 int i;
420 struct net *net = seq->private;
421
422 seq_puts(seq, "TcpExt:");
423 for (i = 0; snmp4_net_list[i].name != NULL; i++)
424 seq_printf(seq, " %s", snmp4_net_list[i].name);
425
426 seq_puts(seq, "\nTcpExt:");
427 for (i = 0; snmp4_net_list[i].name != NULL; i++)
428 seq_printf(seq, " %lu",
429 snmp_fold_field((void __percpu **)net->mib.net_statistics,
430 snmp4_net_list[i].entry));
431
432 seq_puts(seq, "\nIpExt:");
433 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
434 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
435
436 seq_puts(seq, "\nIpExt:");
437 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
438 seq_printf(seq, " %llu",
439 snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
440 snmp4_ipextstats_list[i].entry,
441 offsetof(struct ipstats_mib, syncp)));
442
443 seq_putc(seq, '\n');
444 return 0;
445 }
446
447 static int netstat_seq_open(struct inode *inode, struct file *file)
448 {
449 return single_open_net(inode, file, netstat_seq_show);
450 }
451
452 static const struct file_operations netstat_seq_fops = {
453 .owner = THIS_MODULE,
454 .open = netstat_seq_open,
455 .read = seq_read,
456 .llseek = seq_lseek,
457 .release = single_release_net,
458 };
459
460 static __net_init int ip_proc_init_net(struct net *net)
461 {
462 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
463 goto out_sockstat;
464 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
465 goto out_netstat;
466 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
467 goto out_snmp;
468
469 return 0;
470
471 out_snmp:
472 proc_net_remove(net, "netstat");
473 out_netstat:
474 proc_net_remove(net, "sockstat");
475 out_sockstat:
476 return -ENOMEM;
477 }
478
479 static __net_exit void ip_proc_exit_net(struct net *net)
480 {
481 proc_net_remove(net, "snmp");
482 proc_net_remove(net, "netstat");
483 proc_net_remove(net, "sockstat");
484 }
485
486 static __net_initdata struct pernet_operations ip_proc_ops = {
487 .init = ip_proc_init_net,
488 .exit = ip_proc_exit_net,
489 };
490
491 int __init ip_misc_proc_init(void)
492 {
493 return register_pernet_subsys(&ip_proc_ops);
494 }
495