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thinkpad-acpi: fix initialization error paths
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / ipv4 / proc.c
blob552169b41b16b3e67d07312cfadf5569c6a0968a
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 * Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
11 *
12 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
14 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
15 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
16 *
17 * Fixes:
18 * Alan Cox : UDP sockets show the rxqueue/txqueue
19 * using hint flag for the netinfo.
20 * Pauline Middelink : identd support
21 * Alan Cox : Make /proc safer.
22 * Erik Schoenfelder : /proc/net/snmp
23 * Alan Cox : Handle dead sockets properly.
24 * Gerhard Koerting : Show both timers
25 * Alan Cox : Allow inode to be NULL (kernel socket)
26 * Andi Kleen : Add support for open_requests and
27 * split functions for more readibility.
28 * Andi Kleen : Add support for /proc/net/netstat
29 * Arnaldo C. Melo : Convert to seq_file
30 *
31 * This program is free software; you can redistribute it and/or
32 * modify it under the terms of the GNU General Public License
33 * as published by the Free Software Foundation; either version
34 * 2 of the License, or (at your option) any later version.
35 */
36 #include <linux/types.h>
37 #include <net/net_namespace.h>
38 #include <net/icmp.h>
39 #include <net/protocol.h>
40 #include <net/tcp.h>
41 #include <net/udp.h>
42 #include <net/udplite.h>
43 #include <linux/inetdevice.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.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
56 socket_seq_show(seq);
57 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
58 sock_prot_inuse_get(net, &tcp_prot),
59 atomic_read(&tcp_orphan_count),
60 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
61 atomic_read(&tcp_memory_allocated));
62 seq_printf(seq, "UDP: inuse %d mem %d\n",
63 sock_prot_inuse_get(net, &udp_prot),
64 atomic_read(&udp_memory_allocated));
65 seq_printf(seq, "UDPLITE: inuse %d\n",
66 sock_prot_inuse_get(net, &udplite_prot));
67 seq_printf(seq, "RAW: inuse %d\n",
68 sock_prot_inuse_get(net, &raw_prot));
69 seq_printf(seq, "FRAG: inuse %d memory %d\n",
70 ip_frag_nqueues(net), ip_frag_mem(net));
71 return 0;
72 }
73
74 static int sockstat_seq_open(struct inode *inode, struct file *file)
75 {
76 int err;
77 struct net *net;
78
79 err = -ENXIO;
80 net = get_proc_net(inode);
81 if (net == NULL)
82 goto err_net;
83
84 err = single_open(file, sockstat_seq_show, net);
85 if (err < 0)
86 goto err_open;
87
88 return 0;
89
90 err_open:
91 put_net(net);
92 err_net:
93 return err;
94 }
95
96 static int sockstat_seq_release(struct inode *inode, struct file *file)
97 {
98 struct net *net = ((struct seq_file *)file->private_data)->private;
99
100 put_net(net);
101 return single_release(inode, file);
102 }
103
104 static const struct file_operations sockstat_seq_fops = {
105 .owner = THIS_MODULE,
106 .open = sockstat_seq_open,
107 .read = seq_read,
108 .llseek = seq_lseek,
109 .release = sockstat_seq_release,
110 };
111
112 /* snmp items */
113 static const struct snmp_mib snmp4_ipstats_list[] = {
114 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
115 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
116 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
117 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
118 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
119 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
120 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
121 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
122 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
123 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
124 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
125 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
126 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
127 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
128 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
129 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
130 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
131 SNMP_MIB_SENTINEL
132 };
133
134 /* Following RFC4293 items are displayed in /proc/net/netstat */
135 static const struct snmp_mib snmp4_ipextstats_list[] = {
136 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
137 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
138 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
139 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
140 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
141 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
142 SNMP_MIB_SENTINEL
143 };
144
145 static struct {
146 char *name;
147 int index;
148 } icmpmibmap[] = {
149 { "DestUnreachs", ICMP_DEST_UNREACH },
150 { "TimeExcds", ICMP_TIME_EXCEEDED },
151 { "ParmProbs", ICMP_PARAMETERPROB },
152 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
153 { "Redirects", ICMP_REDIRECT },
154 { "Echos", ICMP_ECHO },
155 { "EchoReps", ICMP_ECHOREPLY },
156 { "Timestamps", ICMP_TIMESTAMP },
157 { "TimestampReps", ICMP_TIMESTAMPREPLY },
158 { "AddrMasks", ICMP_ADDRESS },
159 { "AddrMaskReps", ICMP_ADDRESSREPLY },
160 { NULL, 0 }
161 };
162
163
164 static const struct snmp_mib snmp4_tcp_list[] = {
165 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
166 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
167 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
168 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
169 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
170 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
171 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
172 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
173 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
174 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
175 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
176 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
177 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
178 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
179 SNMP_MIB_SENTINEL
180 };
181
182 static const struct snmp_mib snmp4_udp_list[] = {
183 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
184 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
185 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
186 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
187 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
188 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
189 SNMP_MIB_SENTINEL
190 };
191
192 static const struct snmp_mib snmp4_net_list[] = {
193 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
194 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
195 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
196 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
197 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
198 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
199 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
200 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
201 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
202 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
203 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
204 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
205 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
206 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
207 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
208 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
209 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
210 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
211 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
212 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
213 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
214 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
215 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
216 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
217 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
218 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
219 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
220 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
221 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
222 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
223 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
224 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
225 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
226 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
227 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
228 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
229 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
230 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
231 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
232 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
233 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
234 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
235 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
236 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
237 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
238 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
239 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
240 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
241 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
242 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
243 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
244 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
245 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
246 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
247 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
248 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
249 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
250 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
251 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
252 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
253 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
254 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
255 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
256 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
257 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
258 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
259 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
260 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
261 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
262 SNMP_MIB_SENTINEL
263 };
264
265 static void icmpmsg_put(struct seq_file *seq)
266 {
267 #define PERLINE 16
268
269 int j, i, count;
270 static int out[PERLINE];
271
272 count = 0;
273 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
274
275 if (snmp_fold_field((void **) icmpmsg_statistics, i))
276 out[count++] = i;
277 if (count < PERLINE)
278 continue;
279
280 seq_printf(seq, "\nIcmpMsg:");
281 for (j = 0; j < PERLINE; ++j)
282 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
283 i & 0xff);
284 seq_printf(seq, "\nIcmpMsg: ");
285 for (j = 0; j < PERLINE; ++j)
286 seq_printf(seq, " %lu",
287 snmp_fold_field((void **) icmpmsg_statistics,
288 out[j]));
289 seq_putc(seq, '\n');
290 }
291 if (count) {
292 seq_printf(seq, "\nIcmpMsg:");
293 for (j = 0; j < count; ++j)
294 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
295 "In", out[j] & 0xff);
296 seq_printf(seq, "\nIcmpMsg:");
297 for (j = 0; j < count; ++j)
298 seq_printf(seq, " %lu", snmp_fold_field((void **)
299 icmpmsg_statistics, out[j]));
300 }
301
302 #undef PERLINE
303 }
304
305 static void icmp_put(struct seq_file *seq)
306 {
307 int i;
308
309 seq_puts(seq, "\nIcmp: InMsgs InErrors");
310 for (i=0; icmpmibmap[i].name != NULL; i++)
311 seq_printf(seq, " In%s", icmpmibmap[i].name);
312 seq_printf(seq, " OutMsgs OutErrors");
313 for (i=0; icmpmibmap[i].name != NULL; i++)
314 seq_printf(seq, " Out%s", icmpmibmap[i].name);
315 seq_printf(seq, "\nIcmp: %lu %lu",
316 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
317 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
318 for (i=0; icmpmibmap[i].name != NULL; i++)
319 seq_printf(seq, " %lu",
320 snmp_fold_field((void **) icmpmsg_statistics,
321 icmpmibmap[i].index));
322 seq_printf(seq, " %lu %lu",
323 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
324 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
325 for (i=0; icmpmibmap[i].name != NULL; i++)
326 seq_printf(seq, " %lu",
327 snmp_fold_field((void **) icmpmsg_statistics,
328 icmpmibmap[i].index | 0x100));
329 }
330
331 /*
332 * Called from the PROCfs module. This outputs /proc/net/snmp.
333 */
334 static int snmp_seq_show(struct seq_file *seq, void *v)
335 {
336 int i;
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(&init_net, FORWARDING) ? 1 : 2,
345 sysctl_ip_default_ttl);
346
347 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
348 seq_printf(seq, " %lu",
349 snmp_fold_field((void **)ip_statistics,
350 snmp4_ipstats_list[i].entry));
351
352 icmp_put(seq); /* RFC 2011 compatibility */
353 icmpmsg_put(seq);
354
355 seq_puts(seq, "\nTcp:");
356 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
357 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
358
359 seq_puts(seq, "\nTcp:");
360 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
361 /* MaxConn field is signed, RFC 2012 */
362 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
363 seq_printf(seq, " %ld",
364 snmp_fold_field((void **)tcp_statistics,
365 snmp4_tcp_list[i].entry));
366 else
367 seq_printf(seq, " %lu",
368 snmp_fold_field((void **)tcp_statistics,
369 snmp4_tcp_list[i].entry));
370 }
371
372 seq_puts(seq, "\nUdp:");
373 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
374 seq_printf(seq, " %s", snmp4_udp_list[i].name);
375
376 seq_puts(seq, "\nUdp:");
377 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
378 seq_printf(seq, " %lu",
379 snmp_fold_field((void **)udp_statistics,
380 snmp4_udp_list[i].entry));
381
382 /* the UDP and UDP-Lite MIBs are the same */
383 seq_puts(seq, "\nUdpLite:");
384 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
385 seq_printf(seq, " %s", snmp4_udp_list[i].name);
386
387 seq_puts(seq, "\nUdpLite:");
388 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
389 seq_printf(seq, " %lu",
390 snmp_fold_field((void **)udplite_statistics,
391 snmp4_udp_list[i].entry));
392
393 seq_putc(seq, '\n');
394 return 0;
395 }
396
397 static int snmp_seq_open(struct inode *inode, struct file *file)
398 {
399 return single_open(file, snmp_seq_show, NULL);
400 }
401
402 static const struct file_operations snmp_seq_fops = {
403 .owner = THIS_MODULE,
404 .open = snmp_seq_open,
405 .read = seq_read,
406 .llseek = seq_lseek,
407 .release = single_release,
408 };
409
410
411
412 /*
413 * Output /proc/net/netstat
414 */
415 static int netstat_seq_show(struct seq_file *seq, void *v)
416 {
417 int i;
418
419 seq_puts(seq, "TcpExt:");
420 for (i = 0; snmp4_net_list[i].name != NULL; i++)
421 seq_printf(seq, " %s", snmp4_net_list[i].name);
422
423 seq_puts(seq, "\nTcpExt:");
424 for (i = 0; snmp4_net_list[i].name != NULL; i++)
425 seq_printf(seq, " %lu",
426 snmp_fold_field((void **)net_statistics,
427 snmp4_net_list[i].entry));
428
429 seq_puts(seq, "\nIpExt:");
430 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
431 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
432
433 seq_puts(seq, "\nIpExt:");
434 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
435 seq_printf(seq, " %lu",
436 snmp_fold_field((void **)ip_statistics,
437 snmp4_ipextstats_list[i].entry));
438
439 seq_putc(seq, '\n');
440 return 0;
441 }
442
443 static int netstat_seq_open(struct inode *inode, struct file *file)
444 {
445 return single_open(file, netstat_seq_show, NULL);
446 }
447
448 static const struct file_operations netstat_seq_fops = {
449 .owner = THIS_MODULE,
450 .open = netstat_seq_open,
451 .read = seq_read,
452 .llseek = seq_lseek,
453 .release = single_release,
454 };
455
456 static __net_init int ip_proc_init_net(struct net *net)
457 {
458 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
459 return -ENOMEM;
460 return 0;
461 }
462
463 static __net_exit void ip_proc_exit_net(struct net *net)
464 {
465 proc_net_remove(net, "sockstat");
466 }
467
468 static __net_initdata struct pernet_operations ip_proc_ops = {
469 .init = ip_proc_init_net,
470 .exit = ip_proc_exit_net,
471 };
472
473 int __init ip_misc_proc_init(void)
474 {
475 int rc = 0;
476
477 if (register_pernet_subsys(&ip_proc_ops))
478 goto out_pernet;
479
480 if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
481 goto out_netstat;
482
483 if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
484 goto out_snmp;
485 out:
486 return rc;
487 out_snmp:
488 proc_net_remove(&init_net, "netstat");
489 out_netstat:
490 unregister_pernet_subsys(&ip_proc_ops);
491 out_pernet:
492 rc = -ENOMEM;
493 goto out;
494 }
495
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