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dccp: fix use-after-free in dccp_feat_activate_values
[linux/fpc-iii.git] / net / ipv6 / proc.c
blobcc8e3ae9ca736490c3f689297d190f930fdd2ac9
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 .owner = THIS_MODULE,
62 .open = sockstat6_seq_open,
63 .read = seq_read,
64 .llseek = seq_lseek,
65 .release = single_release_net,
66 };
67
68 static const struct snmp_mib snmp6_ipstats_list[] = {
69 /* ipv6 mib according to RFC 2465 */
70 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
71 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
72 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
73 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
74 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
75 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
76 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
77 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
78 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
79 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
80 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
81 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
82 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
83 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
84 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
85 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
86 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
87 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
88 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
89 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
90 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
91 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
92 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
93 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
94 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
95 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
96 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
97 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
98 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */
99 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
100 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
101 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
102 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
103 SNMP_MIB_SENTINEL
104 };
105
106 static const struct snmp_mib snmp6_icmp6_list[] = {
107 /* icmpv6 mib according to RFC 2466 */
108 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
109 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
110 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
111 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
112 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
113 SNMP_MIB_SENTINEL
114 };
115
116 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
117 static const char *const icmp6type2name[256] = {
118 [ICMPV6_DEST_UNREACH] = "DestUnreachs",
119 [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
120 [ICMPV6_TIME_EXCEED] = "TimeExcds",
121 [ICMPV6_PARAMPROB] = "ParmProblems",
122 [ICMPV6_ECHO_REQUEST] = "Echos",
123 [ICMPV6_ECHO_REPLY] = "EchoReplies",
124 [ICMPV6_MGM_QUERY] = "GroupMembQueries",
125 [ICMPV6_MGM_REPORT] = "GroupMembResponses",
126 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
127 [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
128 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
129 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
130 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
131 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
132 [NDISC_REDIRECT] = "Redirects",
133 };
134
135
136 static const struct snmp_mib snmp6_udp6_list[] = {
137 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
138 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
139 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
140 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
141 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
142 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
143 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
144 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
145 SNMP_MIB_SENTINEL
146 };
147
148 static const struct snmp_mib snmp6_udplite6_list[] = {
149 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
150 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
151 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
152 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
153 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
154 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
155 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
156 SNMP_MIB_SENTINEL
157 };
158
159 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
160 {
161 char name[32];
162 int i;
163
164 /* print by name -- deprecated items */
165 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
166 int icmptype;
167 const char *p;
168
169 icmptype = i & 0xff;
170 p = icmp6type2name[icmptype];
171 if (!p) /* don't print un-named types here */
172 continue;
173 snprintf(name, sizeof(name), "Icmp6%s%s",
174 i & 0x100 ? "Out" : "In", p);
175 seq_printf(seq, "%-32s\t%lu\n", name,
176 atomic_long_read(smib + i));
177 }
178
179 /* print by number (nonzero only) - ICMPMsgStat format */
180 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
181 unsigned long val;
182
183 val = atomic_long_read(smib + i);
184 if (!val)
185 continue;
186 snprintf(name, sizeof(name), "Icmp6%sType%u",
187 i & 0x100 ? "Out" : "In", i & 0xff);
188 seq_printf(seq, "%-32s\t%lu\n", name, val);
189 }
190 }
191
192 /* can be called either with percpu mib (pcpumib != NULL),
193 * or shared one (smib != NULL)
194 */
195 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
196 atomic_long_t *smib,
197 const struct snmp_mib *itemlist)
198 {
199 unsigned long buff[SNMP_MIB_MAX];
200 int i;
201
202 if (pcpumib) {
203 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX);
204
205 snmp_get_cpu_field_batch(buff, itemlist, pcpumib);
206 for (i = 0; itemlist[i].name; i++)
207 seq_printf(seq, "%-32s\t%lu\n",
208 itemlist[i].name, buff[i]);
209 } else {
210 for (i = 0; itemlist[i].name; i++)
211 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
212 atomic_long_read(smib + itemlist[i].entry));
213 }
214 }
215
216 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
217 const struct snmp_mib *itemlist, size_t syncpoff)
218 {
219 u64 buff64[SNMP_MIB_MAX];
220 int i;
221
222 memset(buff64, 0, sizeof(unsigned long) * SNMP_MIB_MAX);
223
224 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff);
225 for (i = 0; itemlist[i].name; i++)
226 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]);
227 }
228
229 static int snmp6_seq_show(struct seq_file *seq, void *v)
230 {
231 struct net *net = (struct net *)seq->private;
232
233 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,
234 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
235 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
236 NULL, snmp6_icmp6_list);
237 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
238 snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
239 NULL, snmp6_udp6_list);
240 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
241 NULL, snmp6_udplite6_list);
242 return 0;
243 }
244
245 static int snmp6_seq_open(struct inode *inode, struct file *file)
246 {
247 return single_open_net(inode, file, snmp6_seq_show);
248 }
249
250 static const struct file_operations snmp6_seq_fops = {
251 .owner = THIS_MODULE,
252 .open = snmp6_seq_open,
253 .read = seq_read,
254 .llseek = seq_lseek,
255 .release = single_release_net,
256 };
257
258 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
259 {
260 struct inet6_dev *idev = (struct inet6_dev *)seq->private;
261
262 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
263 snmp6_seq_show_item64(seq, idev->stats.ipv6,
264 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
265 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
266 snmp6_icmp6_list);
267 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
268 return 0;
269 }
270
271 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
272 {
273 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode));
274 }
275
276 static const struct file_operations snmp6_dev_seq_fops = {
277 .owner = THIS_MODULE,
278 .open = snmp6_dev_seq_open,
279 .read = seq_read,
280 .llseek = seq_lseek,
281 .release = single_release,
282 };
283
284 int snmp6_register_dev(struct inet6_dev *idev)
285 {
286 struct proc_dir_entry *p;
287 struct net *net;
288
289 if (!idev || !idev->dev)
290 return -EINVAL;
291
292 net = dev_net(idev->dev);
293 if (!net->mib.proc_net_devsnmp6)
294 return -ENOENT;
295
296 p = proc_create_data(idev->dev->name, S_IRUGO,
297 net->mib.proc_net_devsnmp6,
298 &snmp6_dev_seq_fops, idev);
299 if (!p)
300 return -ENOMEM;
301
302 idev->stats.proc_dir_entry = p;
303 return 0;
304 }
305
306 int snmp6_unregister_dev(struct inet6_dev *idev)
307 {
308 struct net *net = dev_net(idev->dev);
309 if (!net->mib.proc_net_devsnmp6)
310 return -ENOENT;
311 if (!idev->stats.proc_dir_entry)
312 return -EINVAL;
313 proc_remove(idev->stats.proc_dir_entry);
314 idev->stats.proc_dir_entry = NULL;
315 return 0;
316 }
317
318 static int __net_init ipv6_proc_init_net(struct net *net)
319 {
320 if (!proc_create("sockstat6", S_IRUGO, net->proc_net,
321 &sockstat6_seq_fops))
322 return -ENOMEM;
323
324 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops))
325 goto proc_snmp6_fail;
326
327 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
328 if (!net->mib.proc_net_devsnmp6)
329 goto proc_dev_snmp6_fail;
330 return 0;
331
332 proc_dev_snmp6_fail:
333 remove_proc_entry("snmp6", net->proc_net);
334 proc_snmp6_fail:
335 remove_proc_entry("sockstat6", net->proc_net);
336 return -ENOMEM;
337 }
338
339 static void __net_exit ipv6_proc_exit_net(struct net *net)
340 {
341 remove_proc_entry("sockstat6", net->proc_net);
342 remove_proc_entry("dev_snmp6", net->proc_net);
343 remove_proc_entry("snmp6", net->proc_net);
344 }
345
346 static struct pernet_operations ipv6_proc_ops = {
347 .init = ipv6_proc_init_net,
348 .exit = ipv6_proc_exit_net,
349 };
350
351 int __init ipv6_misc_proc_init(void)
352 {
353 return register_pernet_subsys(&ipv6_proc_ops);
354 }
355
356 void ipv6_misc_proc_exit(void)
357 {
358 unregister_pernet_subsys(&ipv6_proc_ops);
359 }
360
Linux with added FPC-III support