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netfilter: x_tables: remove size check
[linux/fpc-iii.git] / net / ipv6 / proc.c
blobb67814242f78c36f9d0fd96c9f0353fcfc5bfe12
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. This is very similar to the IPv4 version,
8 * except it reports the sockets in the INET6 address family.
9 *
10 * Authors: David S. Miller (davem@caip.rutgers.edu)
11 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18 #include <linux/socket.h>
19 #include <linux/net.h>
20 #include <linux/ipv6.h>
21 #include <linux/proc_fs.h>
22 #include <linux/seq_file.h>
23 #include <linux/stddef.h>
24 #include <linux/export.h>
25 #include <net/net_namespace.h>
26 #include <net/ip.h>
27 #include <net/sock.h>
28 #include <net/tcp.h>
29 #include <net/udp.h>
30 #include <net/transp_v6.h>
31 #include <net/ipv6.h>
32
33 #define MAX4(a, b, c, d) \
34 max_t(u32, max_t(u32, a, b), max_t(u32, c, d))
35 #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \
36 IPSTATS_MIB_MAX, ICMP_MIB_MAX)
37
38 static int sockstat6_seq_show(struct seq_file *seq, void *v)
39 {
40 struct net *net = seq->private;
41 unsigned int frag_mem = ip6_frag_mem(net);
42
43 seq_printf(seq, "TCP6: inuse %d\n",
44 sock_prot_inuse_get(net, &tcpv6_prot));
45 seq_printf(seq, "UDP6: inuse %d\n",
46 sock_prot_inuse_get(net, &udpv6_prot));
47 seq_printf(seq, "UDPLITE6: inuse %d\n",
48 sock_prot_inuse_get(net, &udplitev6_prot));
49 seq_printf(seq, "RAW6: inuse %d\n",
50 sock_prot_inuse_get(net, &rawv6_prot));
51 seq_printf(seq, "FRAG6: inuse %u memory %u\n", !!frag_mem, frag_mem);
52 return 0;
53 }
54
55 static int sockstat6_seq_open(struct inode *inode, struct file *file)
56 {
57 return single_open_net(inode, file, sockstat6_seq_show);
58 }
59
60 static const struct file_operations sockstat6_seq_fops = {
61 .open = sockstat6_seq_open,
62 .read = seq_read,
63 .llseek = seq_lseek,
64 .release = single_release_net,
65 };
66
67 static const struct snmp_mib snmp6_ipstats_list[] = {
68 /* ipv6 mib according to RFC 2465 */
69 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
70 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
71 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
72 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
73 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
74 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
75 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
76 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
77 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
78 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
79 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
80 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
81 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
82 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
83 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
84 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
85 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
86 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
87 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
88 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
89 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
90 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
91 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
92 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
93 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
94 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
95 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
96 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
97 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */
98 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
99 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
100 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
101 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
102 SNMP_MIB_SENTINEL
103 };
104
105 static const struct snmp_mib snmp6_icmp6_list[] = {
106 /* icmpv6 mib according to RFC 2466 */
107 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
108 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
109 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
110 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
111 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
112 SNMP_MIB_SENTINEL
113 };
114
115 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
116 static const char *const icmp6type2name[256] = {
117 [ICMPV6_DEST_UNREACH] = "DestUnreachs",
118 [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
119 [ICMPV6_TIME_EXCEED] = "TimeExcds",
120 [ICMPV6_PARAMPROB] = "ParmProblems",
121 [ICMPV6_ECHO_REQUEST] = "Echos",
122 [ICMPV6_ECHO_REPLY] = "EchoReplies",
123 [ICMPV6_MGM_QUERY] = "GroupMembQueries",
124 [ICMPV6_MGM_REPORT] = "GroupMembResponses",
125 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
126 [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
127 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
128 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
129 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
130 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
131 [NDISC_REDIRECT] = "Redirects",
132 };
133
134
135 static const struct snmp_mib snmp6_udp6_list[] = {
136 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
137 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
138 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
139 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
140 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
141 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
142 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
143 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
144 SNMP_MIB_SENTINEL
145 };
146
147 static const struct snmp_mib snmp6_udplite6_list[] = {
148 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
149 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
150 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
151 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
152 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
153 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
154 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
155 SNMP_MIB_SENTINEL
156 };
157
158 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
159 {
160 char name[32];
161 int i;
162
163 /* print by name -- deprecated items */
164 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
165 int icmptype;
166 const char *p;
167
168 icmptype = i & 0xff;
169 p = icmp6type2name[icmptype];
170 if (!p) /* don't print un-named types here */
171 continue;
172 snprintf(name, sizeof(name), "Icmp6%s%s",
173 i & 0x100 ? "Out" : "In", p);
174 seq_printf(seq, "%-32s\t%lu\n", name,
175 atomic_long_read(smib + i));
176 }
177
178 /* print by number (nonzero only) - ICMPMsgStat format */
179 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
180 unsigned long val;
181
182 val = atomic_long_read(smib + i);
183 if (!val)
184 continue;
185 snprintf(name, sizeof(name), "Icmp6%sType%u",
186 i & 0x100 ? "Out" : "In", i & 0xff);
187 seq_printf(seq, "%-32s\t%lu\n", name, val);
188 }
189 }
190
191 /* can be called either with percpu mib (pcpumib != NULL),
192 * or shared one (smib != NULL)
193 */
194 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
195 atomic_long_t *smib,
196 const struct snmp_mib *itemlist)
197 {
198 unsigned long buff[SNMP_MIB_MAX];
199 int i;
200
201 if (pcpumib) {
202 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX);
203
204 snmp_get_cpu_field_batch(buff, itemlist, pcpumib);
205 for (i = 0; itemlist[i].name; i++)
206 seq_printf(seq, "%-32s\t%lu\n",
207 itemlist[i].name, buff[i]);
208 } else {
209 for (i = 0; itemlist[i].name; i++)
210 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
211 atomic_long_read(smib + itemlist[i].entry));
212 }
213 }
214
215 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
216 const struct snmp_mib *itemlist, size_t syncpoff)
217 {
218 u64 buff64[SNMP_MIB_MAX];
219 int i;
220
221 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX);
222
223 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff);
224 for (i = 0; itemlist[i].name; i++)
225 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]);
226 }
227
228 static int snmp6_seq_show(struct seq_file *seq, void *v)
229 {
230 struct net *net = (struct net *)seq->private;
231
232 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,
233 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
234 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
235 NULL, snmp6_icmp6_list);
236 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
237 snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
238 NULL, snmp6_udp6_list);
239 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
240 NULL, snmp6_udplite6_list);
241 return 0;
242 }
243
244 static int snmp6_seq_open(struct inode *inode, struct file *file)
245 {
246 return single_open_net(inode, file, snmp6_seq_show);
247 }
248
249 static const struct file_operations snmp6_seq_fops = {
250 .open = snmp6_seq_open,
251 .read = seq_read,
252 .llseek = seq_lseek,
253 .release = single_release_net,
254 };
255
256 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
257 {
258 struct inet6_dev *idev = (struct inet6_dev *)seq->private;
259
260 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
261 snmp6_seq_show_item64(seq, idev->stats.ipv6,
262 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
263 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
264 snmp6_icmp6_list);
265 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
266 return 0;
267 }
268
269 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
270 {
271 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode));
272 }
273
274 static const struct file_operations snmp6_dev_seq_fops = {
275 .open = snmp6_dev_seq_open,
276 .read = seq_read,
277 .llseek = seq_lseek,
278 .release = single_release,
279 };
280
281 int snmp6_register_dev(struct inet6_dev *idev)
282 {
283 struct proc_dir_entry *p;
284 struct net *net;
285
286 if (!idev || !idev->dev)
287 return -EINVAL;
288
289 net = dev_net(idev->dev);
290 if (!net->mib.proc_net_devsnmp6)
291 return -ENOENT;
292
293 p = proc_create_data(idev->dev->name, S_IRUGO,
294 net->mib.proc_net_devsnmp6,
295 &snmp6_dev_seq_fops, idev);
296 if (!p)
297 return -ENOMEM;
298
299 idev->stats.proc_dir_entry = p;
300 return 0;
301 }
302
303 int snmp6_unregister_dev(struct inet6_dev *idev)
304 {
305 struct net *net = dev_net(idev->dev);
306 if (!net->mib.proc_net_devsnmp6)
307 return -ENOENT;
308 if (!idev->stats.proc_dir_entry)
309 return -EINVAL;
310 proc_remove(idev->stats.proc_dir_entry);
311 idev->stats.proc_dir_entry = NULL;
312 return 0;
313 }
314
315 static int __net_init ipv6_proc_init_net(struct net *net)
316 {
317 if (!proc_create("sockstat6", S_IRUGO, net->proc_net,
318 &sockstat6_seq_fops))
319 return -ENOMEM;
320
321 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops))
322 goto proc_snmp6_fail;
323
324 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
325 if (!net->mib.proc_net_devsnmp6)
326 goto proc_dev_snmp6_fail;
327 return 0;
328
329 proc_dev_snmp6_fail:
330 remove_proc_entry("snmp6", net->proc_net);
331 proc_snmp6_fail:
332 remove_proc_entry("sockstat6", net->proc_net);
333 return -ENOMEM;
334 }
335
336 static void __net_exit ipv6_proc_exit_net(struct net *net)
337 {
338 remove_proc_entry("sockstat6", net->proc_net);
339 remove_proc_entry("dev_snmp6", net->proc_net);
340 remove_proc_entry("snmp6", net->proc_net);
341 }
342
343 static struct pernet_operations ipv6_proc_ops = {
344 .init = ipv6_proc_init_net,
345 .exit = ipv6_proc_exit_net,
346 };
347
348 int __init ipv6_misc_proc_init(void)
349 {
350 return register_pernet_subsys(&ipv6_proc_ops);
351 }
352
353 void ipv6_misc_proc_exit(void)
354 {
355 unregister_pernet_subsys(&ipv6_proc_ops);
356 }
357
Linux with added FPC-III support