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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 | ||
42 | seq_printf(seq, "TCP6: inuse %d\n", | |
43 | sock_prot_inuse_get(net, &tcpv6_prot)); | |
44 | seq_printf(seq, "UDP6: inuse %d\n", | |
45 | sock_prot_inuse_get(net, &udpv6_prot)); | |
46 | seq_printf(seq, "UDPLITE6: inuse %d\n", | |
47 | sock_prot_inuse_get(net, &udplitev6_prot)); | |
48 | seq_printf(seq, "RAW6: inuse %d\n", | |
49 | sock_prot_inuse_get(net, &rawv6_prot)); | |
50 | seq_printf(seq, "FRAG6: inuse %u memory %lu\n", | |
51 | atomic_read(&net->ipv6.frags.rhashtable.nelems), | |
52 | frag_mem_limit(&net->ipv6.frags)); | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static int sockstat6_seq_open(struct inode *inode, struct file *file) | |
57 | { | |
58 | return single_open_net(inode, file, sockstat6_seq_show); | |
59 | } | |
60 | ||
61 | static const struct file_operations sockstat6_seq_fops = { | |
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(u64) * 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 | .open = snmp6_seq_open, | |
252 | .read = seq_read, | |
253 | .llseek = seq_lseek, | |
254 | .release = single_release_net, | |
255 | }; | |
256 | ||
257 | static int snmp6_dev_seq_show(struct seq_file *seq, void *v) | |
258 | { | |
259 | struct inet6_dev *idev = (struct inet6_dev *)seq->private; | |
260 | ||
261 | seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); | |
262 | snmp6_seq_show_item64(seq, idev->stats.ipv6, | |
263 | snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); | |
264 | snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, | |
265 | snmp6_icmp6_list); | |
266 | snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); | |
267 | return 0; | |
268 | } | |
269 | ||
270 | int snmp6_register_dev(struct inet6_dev *idev) | |
271 | { | |
272 | struct proc_dir_entry *p; | |
273 | struct net *net; | |
274 | ||
275 | if (!idev || !idev->dev) | |
276 | return -EINVAL; | |
277 | ||
278 | net = dev_net(idev->dev); | |
279 | if (!net->mib.proc_net_devsnmp6) | |
280 | return -ENOENT; | |
281 | ||
282 | p = proc_create_single_data(idev->dev->name, 0444, | |
283 | net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev); | |
284 | if (!p) | |
285 | return -ENOMEM; | |
286 | ||
287 | idev->stats.proc_dir_entry = p; | |
288 | return 0; | |
289 | } | |
290 | ||
291 | int snmp6_unregister_dev(struct inet6_dev *idev) | |
292 | { | |
293 | struct net *net = dev_net(idev->dev); | |
294 | if (!net->mib.proc_net_devsnmp6) | |
295 | return -ENOENT; | |
296 | if (!idev->stats.proc_dir_entry) | |
297 | return -EINVAL; | |
298 | proc_remove(idev->stats.proc_dir_entry); | |
299 | idev->stats.proc_dir_entry = NULL; | |
300 | return 0; | |
301 | } | |
302 | ||
303 | static int __net_init ipv6_proc_init_net(struct net *net) | |
304 | { | |
305 | if (!proc_create("sockstat6", 0444, net->proc_net, | |
306 | &sockstat6_seq_fops)) | |
307 | return -ENOMEM; | |
308 | ||
309 | if (!proc_create("snmp6", 0444, net->proc_net, &snmp6_seq_fops)) | |
310 | goto proc_snmp6_fail; | |
311 | ||
312 | net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); | |
313 | if (!net->mib.proc_net_devsnmp6) | |
314 | goto proc_dev_snmp6_fail; | |
315 | return 0; | |
316 | ||
317 | proc_dev_snmp6_fail: | |
318 | remove_proc_entry("snmp6", net->proc_net); | |
319 | proc_snmp6_fail: | |
320 | remove_proc_entry("sockstat6", net->proc_net); | |
321 | return -ENOMEM; | |
322 | } | |
323 | ||
324 | static void __net_exit ipv6_proc_exit_net(struct net *net) | |
325 | { | |
326 | remove_proc_entry("sockstat6", net->proc_net); | |
327 | remove_proc_entry("dev_snmp6", net->proc_net); | |
328 | remove_proc_entry("snmp6", net->proc_net); | |
329 | } | |
330 | ||
331 | static struct pernet_operations ipv6_proc_ops = { | |
332 | .init = ipv6_proc_init_net, | |
333 | .exit = ipv6_proc_exit_net, | |
334 | }; | |
335 | ||
336 | int __init ipv6_misc_proc_init(void) | |
337 | { | |
338 | return register_pernet_subsys(&ipv6_proc_ops); | |
339 | } | |
340 | ||
341 | void ipv6_misc_proc_exit(void) | |
342 | { | |
343 | unregister_pernet_subsys(&ipv6_proc_ops); | |
344 | } |