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net: Use a percpu_counter for sockets_allocated
[deliverable/linux.git] / net / ipv4 / proc.c
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,
59 (int)percpu_counter_sum_positive(&tcp_sockets_allocated),
60 atomic_read(&tcp_memory_allocated));
61 seq_printf(seq, "UDP: inuse %d mem %d\n",
62 sock_prot_inuse_get(net, &udp_prot),
63 atomic_read(&udp_memory_allocated));
64 seq_printf(seq, "UDPLITE: inuse %d\n",
65 sock_prot_inuse_get(net, &udplite_prot));
66 seq_printf(seq, "RAW: inuse %d\n",
67 sock_prot_inuse_get(net, &raw_prot));
68 seq_printf(seq, "FRAG: inuse %d memory %d\n",
69 ip_frag_nqueues(net), ip_frag_mem(net));
70 return 0;
71 }
72
73 static int sockstat_seq_open(struct inode *inode, struct file *file)
74 {
75 return single_open_net(inode, file, sockstat_seq_show);
76 }
77
78 static const struct file_operations sockstat_seq_fops = {
79 .owner = THIS_MODULE,
80 .open = sockstat_seq_open,
81 .read = seq_read,
82 .llseek = seq_lseek,
83 .release = single_release_net,
84 };
85
86 /* snmp items */
87 static const struct snmp_mib snmp4_ipstats_list[] = {
88 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
89 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
90 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
91 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
92 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
93 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
94 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
95 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
96 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
97 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
98 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
99 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
100 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
101 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
102 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
103 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
104 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
105 SNMP_MIB_SENTINEL
106 };
107
108 /* Following RFC4293 items are displayed in /proc/net/netstat */
109 static const struct snmp_mib snmp4_ipextstats_list[] = {
110 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
111 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
112 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
113 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
114 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
115 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
116 SNMP_MIB_SENTINEL
117 };
118
119 static struct {
120 char *name;
121 int index;
122 } icmpmibmap[] = {
123 { "DestUnreachs", ICMP_DEST_UNREACH },
124 { "TimeExcds", ICMP_TIME_EXCEEDED },
125 { "ParmProbs", ICMP_PARAMETERPROB },
126 { "SrcQuenchs", ICMP_SOURCE_QUENCH },
127 { "Redirects", ICMP_REDIRECT },
128 { "Echos", ICMP_ECHO },
129 { "EchoReps", ICMP_ECHOREPLY },
130 { "Timestamps", ICMP_TIMESTAMP },
131 { "TimestampReps", ICMP_TIMESTAMPREPLY },
132 { "AddrMasks", ICMP_ADDRESS },
133 { "AddrMaskReps", ICMP_ADDRESSREPLY },
134 { NULL, 0 }
135 };
136
137
138 static const struct snmp_mib snmp4_tcp_list[] = {
139 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
140 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
141 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
142 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
143 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
144 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
145 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
146 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
147 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
148 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
149 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
150 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
151 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
152 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
153 SNMP_MIB_SENTINEL
154 };
155
156 static const struct snmp_mib snmp4_udp_list[] = {
157 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
158 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
159 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
160 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
161 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
162 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
163 SNMP_MIB_SENTINEL
164 };
165
166 static const struct snmp_mib snmp4_net_list[] = {
167 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
168 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
169 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
170 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
171 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
172 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
173 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
174 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
175 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
176 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
177 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
178 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
179 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
180 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
181 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
182 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
183 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
184 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
185 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
186 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
187 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
188 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
189 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
190 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
191 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
192 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
193 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
194 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
195 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
196 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
197 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
198 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
199 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
200 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
201 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
202 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
203 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
204 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
205 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
206 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
207 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
208 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
209 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
210 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
211 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
212 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
213 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
214 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
215 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
216 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
217 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
218 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
219 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
220 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
221 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
222 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
223 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
224 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
225 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
226 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
227 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
228 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
229 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
230 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
231 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
232 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
233 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
234 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
235 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
236 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
237 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
238 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
239 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
240 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
241 SNMP_MIB_SENTINEL
242 };
243
244 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
245 unsigned short *type, int count)
246 {
247 int j;
248
249 if (count) {
250 seq_printf(seq, "\nIcmpMsg:");
251 for (j = 0; j < count; ++j)
252 seq_printf(seq, " %sType%u",
253 type[j] & 0x100 ? "Out" : "In",
254 type[j] & 0xff);
255 seq_printf(seq, "\nIcmpMsg:");
256 for (j = 0; j < count; ++j)
257 seq_printf(seq, " %lu", vals[j]);
258 }
259 }
260
261 static void icmpmsg_put(struct seq_file *seq)
262 {
263 #define PERLINE 16
264
265 int i, count;
266 unsigned short type[PERLINE];
267 unsigned long vals[PERLINE], val;
268 struct net *net = seq->private;
269
270 count = 0;
271 for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
272 val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i);
273 if (val) {
274 type[count] = i;
275 vals[count++] = val;
276 }
277 if (count == PERLINE) {
278 icmpmsg_put_line(seq, vals, type, count);
279 count = 0;
280 }
281 }
282 icmpmsg_put_line(seq, vals, type, count);
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 const struct file_operations snmp_seq_fops = {
387 .owner = THIS_MODULE,
388 .open = snmp_seq_open,
389 .read = seq_read,
390 .llseek = seq_lseek,
391 .release = single_release_net,
392 };
393
394
395
396 /*
397 * Output /proc/net/netstat
398 */
399 static int netstat_seq_show(struct seq_file *seq, void *v)
400 {
401 int i;
402 struct net *net = seq->private;
403
404 seq_puts(seq, "TcpExt:");
405 for (i = 0; snmp4_net_list[i].name != NULL; i++)
406 seq_printf(seq, " %s", snmp4_net_list[i].name);
407
408 seq_puts(seq, "\nTcpExt:");
409 for (i = 0; snmp4_net_list[i].name != NULL; i++)
410 seq_printf(seq, " %lu",
411 snmp_fold_field((void **)net->mib.net_statistics,
412 snmp4_net_list[i].entry));
413
414 seq_puts(seq, "\nIpExt:");
415 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
416 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
417
418 seq_puts(seq, "\nIpExt:");
419 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
420 seq_printf(seq, " %lu",
421 snmp_fold_field((void **)net->mib.ip_statistics,
422 snmp4_ipextstats_list[i].entry));
423
424 seq_putc(seq, '\n');
425 return 0;
426 }
427
428 static int netstat_seq_open(struct inode *inode, struct file *file)
429 {
430 return single_open_net(inode, file, netstat_seq_show);
431 }
432
433 static const struct file_operations netstat_seq_fops = {
434 .owner = THIS_MODULE,
435 .open = netstat_seq_open,
436 .read = seq_read,
437 .llseek = seq_lseek,
438 .release = single_release_net,
439 };
440
441 static __net_init int ip_proc_init_net(struct net *net)
442 {
443 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
444 goto out_sockstat;
445 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
446 goto out_netstat;
447 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
448 goto out_snmp;
449
450 return 0;
451
452 out_snmp:
453 proc_net_remove(net, "netstat");
454 out_netstat:
455 proc_net_remove(net, "sockstat");
456 out_sockstat:
457 return -ENOMEM;
458 }
459
460 static __net_exit void ip_proc_exit_net(struct net *net)
461 {
462 proc_net_remove(net, "snmp");
463 proc_net_remove(net, "netstat");
464 proc_net_remove(net, "sockstat");
465 }
466
467 static __net_initdata struct pernet_operations ip_proc_ops = {
468 .init = ip_proc_init_net,
469 .exit = ip_proc_exit_net,
470 };
471
472 int __init ip_misc_proc_init(void)
473 {
474 return register_pernet_subsys(&ip_proc_ops);
475 }
476
Linux kernel - Deliverables
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