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proc: consolidate per-net single_open callers
[linux-2.6/verdex.git] / net / ipv4 / proc.c
blobdaf5d3c80cef9d5ec8ffa231d8ed2f578f430753
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/inetdevice.h>
42 #include <linux/proc_fs.h>
43 #include <linux/seq_file.h>
44 #include <net/sock.h>
45 #include <net/raw.h>
46
47 /*
48 * Report socket allocation statistics [mea@utu.fi]
49 */
50 static int sockstat_seq_show(struct seq_file *seq, void *v)
51 {
52 struct net *net = seq->private;
53
54 socket_seq_show(seq);
55 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
56 sock_prot_inuse_get(net, &tcp_prot),
57 atomic_read(&tcp_orphan_count),
58 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
59 atomic_read(&tcp_memory_allocated));
60 seq_printf(seq, "UDP: inuse %d mem %d\n",
61 sock_prot_inuse_get(net, &udp_prot),
62 atomic_read(&udp_memory_allocated));
63 seq_printf(seq, "UDPLITE: inuse %d\n",
64 sock_prot_inuse_get(net, &udplite_prot));
65 seq_printf(seq, "RAW: inuse %d\n",
66 sock_prot_inuse_get(net, &raw_prot));
67 seq_printf(seq, "FRAG: inuse %d memory %d\n",
68 ip_frag_nqueues(net), ip_frag_mem(net));
69 return 0;
70 }
71
72 static int sockstat_seq_open(struct inode *inode, struct file *file)
73 {
74 return single_open_net(inode, file, sockstat_seq_show);
75 }
76
77 static int sockstat_seq_release(struct inode *inode, struct file *file)
78 {
79 struct net *net = ((struct seq_file *)file->private_data)->private;
80
81 put_net(net);
82 return single_release(inode, file);
83 }
84
85 static const struct file_operations sockstat_seq_fops = {
86 .owner = THIS_MODULE,
87 .open = sockstat_seq_open,
88 .read = seq_read,
89 .llseek = seq_lseek,
90 .release = sockstat_seq_release,
91 };
92
93 /* snmp items */
94 static const struct snmp_mib snmp4_ipstats_list[] = {
95 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
96 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
97 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
98 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
99 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
100 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
101 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
102 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
103 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
104 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
105 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
106 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
107 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
108 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
109 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
110 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
111 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
112 SNMP_MIB_SENTINEL
113 };
114
115 /* Following RFC4293 items are displayed in /proc/net/netstat */
116 static const struct snmp_mib snmp4_ipextstats_list[] = {
117 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
118 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
119 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
120 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
121 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
122 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
123 SNMP_MIB_SENTINEL
124 };
125
126 static struct {
127 char *name;
128 int index;
129 } icmpmibmap[] = {
130 { "DestUnreachs", ICMP_DEST_UNREACH },
131 { "TimeExcds", ICMP_TIME_EXCEEDED },
132 { "ParmProbs", ICMP_PARAMETERPROB },
133 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
134 { "Redirects", ICMP_REDIRECT },
135 { "Echos", ICMP_ECHO },
136 { "EchoReps", ICMP_ECHOREPLY },
137 { "Timestamps", ICMP_TIMESTAMP },
138 { "TimestampReps", ICMP_TIMESTAMPREPLY },
139 { "AddrMasks", ICMP_ADDRESS },
140 { "AddrMaskReps", ICMP_ADDRESSREPLY },
141 { NULL, 0 }
142 };
143
144
145 static const struct snmp_mib snmp4_tcp_list[] = {
146 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
147 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
148 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
149 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
150 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
151 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
152 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
153 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
154 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
155 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
156 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
157 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
158 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
159 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
160 SNMP_MIB_SENTINEL
161 };
162
163 static const struct snmp_mib snmp4_udp_list[] = {
164 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
165 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
166 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
167 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
168 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
169 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
170 SNMP_MIB_SENTINEL
171 };
172
173 static const struct snmp_mib snmp4_net_list[] = {
174 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
175 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
176 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
177 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
178 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
179 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
180 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
181 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
182 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
183 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
184 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
185 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
186 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
187 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
188 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
189 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
190 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
191 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
192 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
193 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
194 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
195 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
196 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
197 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
198 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
199 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
200 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
201 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
202 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
203 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
204 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
205 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
206 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
207 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
208 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
209 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
210 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
211 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
212 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
213 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
214 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
215 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
216 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
217 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
218 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
219 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
220 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
221 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
222 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
223 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
224 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
225 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
226 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
227 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
228 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
229 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
230 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
231 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
232 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
233 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
234 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
235 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
236 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
237 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
238 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
239 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
240 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
241 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
242 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
243 SNMP_MIB_SENTINEL
244 };
245
246 static void icmpmsg_put(struct seq_file *seq)
247 {
248 #define PERLINE 16
249
250 int j, i, count;
251 static int out[PERLINE];
252 struct net *net = seq->private;
253
254 count = 0;
255 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
256
257 if (snmp_fold_field((void **) net->mib.icmpmsg_statistics, i))
258 out[count++] = i;
259 if (count < PERLINE)
260 continue;
261
262 seq_printf(seq, "\nIcmpMsg:");
263 for (j = 0; j < PERLINE; ++j)
264 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
265 i & 0xff);
266 seq_printf(seq, "\nIcmpMsg: ");
267 for (j = 0; j < PERLINE; ++j)
268 seq_printf(seq, " %lu",
269 snmp_fold_field((void **) net->mib.icmpmsg_statistics,
270 out[j]));
271 seq_putc(seq, '\n');
272 }
273 if (count) {
274 seq_printf(seq, "\nIcmpMsg:");
275 for (j = 0; j < count; ++j)
276 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
277 "In", out[j] & 0xff);
278 seq_printf(seq, "\nIcmpMsg:");
279 for (j = 0; j < count; ++j)
280 seq_printf(seq, " %lu", snmp_fold_field((void **)
281 net->mib.icmpmsg_statistics, out[j]));
282 }
283
284 #undef PERLINE
285 }
286
287 static void icmp_put(struct seq_file *seq)
288 {
289 int i;
290 struct net *net = seq->private;
291
292 seq_puts(seq, "\nIcmp: InMsgs InErrors");
293 for (i=0; icmpmibmap[i].name != NULL; i++)
294 seq_printf(seq, " In%s", icmpmibmap[i].name);
295 seq_printf(seq, " OutMsgs OutErrors");
296 for (i=0; icmpmibmap[i].name != NULL; i++)
297 seq_printf(seq, " Out%s", icmpmibmap[i].name);
298 seq_printf(seq, "\nIcmp: %lu %lu",
299 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
300 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
301 for (i=0; icmpmibmap[i].name != NULL; i++)
302 seq_printf(seq, " %lu",
303 snmp_fold_field((void **) net->mib.icmpmsg_statistics,
304 icmpmibmap[i].index));
305 seq_printf(seq, " %lu %lu",
306 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
307 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
308 for (i=0; icmpmibmap[i].name != NULL; i++)
309 seq_printf(seq, " %lu",
310 snmp_fold_field((void **) net->mib.icmpmsg_statistics,
311 icmpmibmap[i].index | 0x100));
312 }
313
314 /*
315 * Called from the PROCfs module. This outputs /proc/net/snmp.
316 */
317 static int snmp_seq_show(struct seq_file *seq, void *v)
318 {
319 int i;
320 struct net *net = seq->private;
321
322 seq_puts(seq, "Ip: Forwarding DefaultTTL");
323
324 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
325 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
326
327 seq_printf(seq, "\nIp: %d %d",
328 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
329 sysctl_ip_default_ttl);
330
331 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
332 seq_printf(seq, " %lu",
333 snmp_fold_field((void **)net->mib.ip_statistics,
334 snmp4_ipstats_list[i].entry));
335
336 icmp_put(seq); /* RFC 2011 compatibility */
337 icmpmsg_put(seq);
338
339 seq_puts(seq, "\nTcp:");
340 for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
341 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
342
343 seq_puts(seq, "\nTcp:");
344 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
345 /* MaxConn field is signed, RFC 2012 */
346 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
347 seq_printf(seq, " %ld",
348 snmp_fold_field((void **)net->mib.tcp_statistics,
349 snmp4_tcp_list[i].entry));
350 else
351 seq_printf(seq, " %lu",
352 snmp_fold_field((void **)net->mib.tcp_statistics,
353 snmp4_tcp_list[i].entry));
354 }
355
356 seq_puts(seq, "\nUdp:");
357 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
358 seq_printf(seq, " %s", snmp4_udp_list[i].name);
359
360 seq_puts(seq, "\nUdp:");
361 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
362 seq_printf(seq, " %lu",
363 snmp_fold_field((void **)net->mib.udp_statistics,
364 snmp4_udp_list[i].entry));
365
366 /* the UDP and UDP-Lite MIBs are the same */
367 seq_puts(seq, "\nUdpLite:");
368 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
369 seq_printf(seq, " %s", snmp4_udp_list[i].name);
370
371 seq_puts(seq, "\nUdpLite:");
372 for (i = 0; snmp4_udp_list[i].name != NULL; i++)
373 seq_printf(seq, " %lu",
374 snmp_fold_field((void **)net->mib.udplite_statistics,
375 snmp4_udp_list[i].entry));
376
377 seq_putc(seq, '\n');
378 return 0;
379 }
380
381 static int snmp_seq_open(struct inode *inode, struct file *file)
382 {
383 return single_open_net(inode, file, snmp_seq_show);
384 }
385
386 static int snmp_seq_release(struct inode *inode, struct file *file)
387 {
388 struct net *net = ((struct seq_file *)file->private_data)->private;
389
390 put_net(net);
391 return single_release(inode, file);
392 }
393
394 static const struct file_operations snmp_seq_fops = {
395 .owner = THIS_MODULE,
396 .open = snmp_seq_open,
397 .read = seq_read,
398 .llseek = seq_lseek,
399 .release = snmp_seq_release,
400 };
401
402
403
404 /*
405 * Output /proc/net/netstat
406 */
407 static int netstat_seq_show(struct seq_file *seq, void *v)
408 {
409 int i;
410 struct net *net = seq->private;
411
412 seq_puts(seq, "TcpExt:");
413 for (i = 0; snmp4_net_list[i].name != NULL; i++)
414 seq_printf(seq, " %s", snmp4_net_list[i].name);
415
416 seq_puts(seq, "\nTcpExt:");
417 for (i = 0; snmp4_net_list[i].name != NULL; i++)
418 seq_printf(seq, " %lu",
419 snmp_fold_field((void **)net->mib.net_statistics,
420 snmp4_net_list[i].entry));
421
422 seq_puts(seq, "\nIpExt:");
423 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
424 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
425
426 seq_puts(seq, "\nIpExt:");
427 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
428 seq_printf(seq, " %lu",
429 snmp_fold_field((void **)net->mib.ip_statistics,
430 snmp4_ipextstats_list[i].entry));
431
432 seq_putc(seq, '\n');
433 return 0;
434 }
435
436 static int netstat_seq_open(struct inode *inode, struct file *file)
437 {
438 return single_open_net(inode, file, netstat_seq_show);
439 }
440
441 static int netstat_seq_release(struct inode *inode, struct file *file)
442 {
443 struct net *net = ((struct seq_file *)file->private_data)->private;
444
445 put_net(net);
446 return single_release(inode, file);
447 }
448
449 static const struct file_operations netstat_seq_fops = {
450 .owner = THIS_MODULE,
451 .open = netstat_seq_open,
452 .read = seq_read,
453 .llseek = seq_lseek,
454 .release = netstat_seq_release,
455 };
456
457 static __net_init int ip_proc_init_net(struct net *net)
458 {
459 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
460 goto out_sockstat;
461 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
462 goto out_netstat;
463 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
464 goto out_snmp;
465
466 return 0;
467
468 out_snmp:
469 proc_net_remove(net, "netstat");
470 out_netstat:
471 proc_net_remove(net, "sockstat");
472 out_sockstat:
473 return -ENOMEM;
474 }
475
476 static __net_exit void ip_proc_exit_net(struct net *net)
477 {
478 proc_net_remove(net, "snmp");
479 proc_net_remove(net, "netstat");
480 proc_net_remove(net, "sockstat");
481 }
482
483 static __net_initdata struct pernet_operations ip_proc_ops = {
484 .init = ip_proc_init_net,
485 .exit = ip_proc_exit_net,
486 };
487
488 int __init ip_misc_proc_init(void)
489 {
490 return register_pernet_subsys(&ip_proc_ops);
491 }
492
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