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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
4 | * operating system. INET is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * This file implements the various access functions for the | |
8 | * PROC file system. This is very similar to the IPv4 version, | |
9 | * except it reports the sockets in the INET6 address family. | |
10 | * | |
1da177e4 | 11 | * Authors: David S. Miller (davem@caip.rutgers.edu) |
67ba4152 | 12 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> |
1da177e4 | 13 | */ |
1da177e4 LT |
14 | #include <linux/socket.h> |
15 | #include <linux/net.h> | |
16 | #include <linux/ipv6.h> | |
17 | #include <linux/proc_fs.h> | |
18 | #include <linux/seq_file.h> | |
19 | #include <linux/stddef.h> | |
bc3b2d7f | 20 | #include <linux/export.h> |
457c4cbc | 21 | #include <net/net_namespace.h> |
7f7d9a6b | 22 | #include <net/ip.h> |
1da177e4 LT |
23 | #include <net/sock.h> |
24 | #include <net/tcp.h> | |
1781f7f5 | 25 | #include <net/udp.h> |
1da177e4 LT |
26 | #include <net/transp_v6.h> |
27 | #include <net/ipv6.h> | |
28 | ||
4a4857b1 JH |
29 | #define MAX4(a, b, c, d) \ |
30 | max_t(u32, max_t(u32, a, b), max_t(u32, c, d)) | |
31 | #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \ | |
32 | IPSTATS_MIB_MAX, ICMP_MIB_MAX) | |
33 | ||
1da177e4 LT |
34 | static int sockstat6_seq_show(struct seq_file *seq, void *v) |
35 | { | |
dfb12eb7 PE |
36 | struct net *net = seq->private; |
37 | ||
1da177e4 | 38 | seq_printf(seq, "TCP6: inuse %d\n", |
dfb12eb7 | 39 | sock_prot_inuse_get(net, &tcpv6_prot)); |
1da177e4 | 40 | seq_printf(seq, "UDP6: inuse %d\n", |
dfb12eb7 | 41 | sock_prot_inuse_get(net, &udpv6_prot)); |
ba4e58ec | 42 | seq_printf(seq, "UDPLITE6: inuse %d\n", |
dfb12eb7 | 43 | sock_prot_inuse_get(net, &udplitev6_prot)); |
1da177e4 | 44 | seq_printf(seq, "RAW6: inuse %d\n", |
dfb12eb7 | 45 | sock_prot_inuse_get(net, &rawv6_prot)); |
3e67f106 | 46 | seq_printf(seq, "FRAG6: inuse %u memory %lu\n", |
4907abc6 ED |
47 | atomic_read(&net->ipv6.fqdir->rhashtable.nelems), |
48 | frag_mem_limit(net->ipv6.fqdir)); | |
1da177e4 LT |
49 | return 0; |
50 | } | |
51 | ||
5833929c | 52 | static const struct snmp_mib snmp6_ipstats_list[] = { |
1da177e4 | 53 | /* ipv6 mib according to RFC 2465 */ |
edf391ff | 54 | SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), |
1da177e4 LT |
55 | SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), |
56 | SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), | |
57 | SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), | |
58 | SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), | |
59 | SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), | |
60 | SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), | |
61 | SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), | |
62 | SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), | |
63 | SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), | |
edf391ff | 64 | SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS), |
1da177e4 LT |
65 | SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), |
66 | SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), | |
67 | SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), | |
68 | SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), | |
69 | SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), | |
70 | SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), | |
71 | SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), | |
72 | SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), | |
73 | SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), | |
74 | SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), | |
75 | SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), | |
edf391ff NH |
76 | SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), |
77 | SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), | |
78 | SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), | |
79 | SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), | |
80 | SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), | |
81 | SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), | |
fda3f402 | 82 | /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ |
1f07d03e ED |
83 | SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS), |
84 | SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS), | |
85 | SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS), | |
86 | SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS), | |
1da177e4 LT |
87 | SNMP_MIB_SENTINEL |
88 | }; | |
89 | ||
5833929c | 90 | static const struct snmp_mib snmp6_icmp6_list[] = { |
14878f75 | 91 | /* icmpv6 mib according to RFC 2466 */ |
1da177e4 LT |
92 | SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), |
93 | SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), | |
1da177e4 | 94 | SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), |
1f8438a8 | 95 | SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), |
6a5dc9e5 | 96 | SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), |
1da177e4 LT |
97 | SNMP_MIB_SENTINEL |
98 | }; | |
99 | ||
14878f75 | 100 | /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ |
36cbd3dc | 101 | static const char *const icmp6type2name[256] = { |
14878f75 DS |
102 | [ICMPV6_DEST_UNREACH] = "DestUnreachs", |
103 | [ICMPV6_PKT_TOOBIG] = "PktTooBigs", | |
104 | [ICMPV6_TIME_EXCEED] = "TimeExcds", | |
105 | [ICMPV6_PARAMPROB] = "ParmProblems", | |
fa95c283 | 106 | [ICMPV6_ECHO_REQUEST] = "Echos", |
14878f75 DS |
107 | [ICMPV6_ECHO_REPLY] = "EchoReplies", |
108 | [ICMPV6_MGM_QUERY] = "GroupMembQueries", | |
109 | [ICMPV6_MGM_REPORT] = "GroupMembResponses", | |
110 | [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", | |
111 | [ICMPV6_MLD2_REPORT] = "MLDv2Reports", | |
112 | [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", | |
113 | [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", | |
114 | [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", | |
115 | [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", | |
fa95c283 | 116 | [NDISC_REDIRECT] = "Redirects", |
14878f75 DS |
117 | }; |
118 | ||
119 | ||
5833929c | 120 | static const struct snmp_mib snmp6_udp6_list[] = { |
1da177e4 LT |
121 | SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), |
122 | SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), | |
123 | SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), | |
124 | SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), | |
870be392 ED |
125 | SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), |
126 | SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), | |
6a5dc9e5 | 127 | SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), |
36cbb245 | 128 | SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI), |
a3ce2b10 | 129 | SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS), |
1da177e4 LT |
130 | SNMP_MIB_SENTINEL |
131 | }; | |
132 | ||
5833929c | 133 | static const struct snmp_mib snmp6_udplite6_list[] = { |
ba4e58ec GR |
134 | SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), |
135 | SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), | |
136 | SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), | |
137 | SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), | |
870be392 ED |
138 | SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), |
139 | SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), | |
6a5dc9e5 | 140 | SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), |
a3ce2b10 | 141 | SNMP_MIB_ITEM("UdpLite6MemErrors", UDP_MIB_MEMERRORS), |
ba4e58ec GR |
142 | SNMP_MIB_SENTINEL |
143 | }; | |
144 | ||
2a24444f | 145 | static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) |
14878f75 | 146 | { |
5ece6c2d | 147 | char name[32]; |
14878f75 DS |
148 | int i; |
149 | ||
150 | /* print by name -- deprecated items */ | |
151 | for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { | |
152 | int icmptype; | |
36cbd3dc | 153 | const char *p; |
14878f75 DS |
154 | |
155 | icmptype = i & 0xff; | |
156 | p = icmp6type2name[icmptype]; | |
157 | if (!p) /* don't print un-named types here */ | |
158 | continue; | |
5ece6c2d | 159 | snprintf(name, sizeof(name), "Icmp6%s%s", |
14878f75 DS |
160 | i & 0x100 ? "Out" : "In", p); |
161 | seq_printf(seq, "%-32s\t%lu\n", name, | |
2a24444f | 162 | atomic_long_read(smib + i)); |
14878f75 DS |
163 | } |
164 | ||
165 | /* print by number (nonzero only) - ICMPMsgStat format */ | |
166 | for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { | |
167 | unsigned long val; | |
168 | ||
2a24444f | 169 | val = atomic_long_read(smib + i); |
14878f75 DS |
170 | if (!val) |
171 | continue; | |
5ece6c2d | 172 | snprintf(name, sizeof(name), "Icmp6%sType%u", |
14878f75 DS |
173 | i & 0x100 ? "Out" : "In", i & 0xff); |
174 | seq_printf(seq, "%-32s\t%lu\n", name, val); | |
175 | } | |
14878f75 DS |
176 | } |
177 | ||
be281e55 ED |
178 | /* can be called either with percpu mib (pcpumib != NULL), |
179 | * or shared one (smib != NULL) | |
180 | */ | |
c9f2dba6 | 181 | static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, |
be281e55 | 182 | atomic_long_t *smib, |
5833929c | 183 | const struct snmp_mib *itemlist) |
1da177e4 | 184 | { |
4a4857b1 | 185 | unsigned long buff[SNMP_MIB_MAX]; |
1da177e4 | 186 | int i; |
4ce3c183 | 187 | |
4a4857b1 JH |
188 | if (pcpumib) { |
189 | memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); | |
190 | ||
191 | snmp_get_cpu_field_batch(buff, itemlist, pcpumib); | |
192 | for (i = 0; itemlist[i].name; i++) | |
193 | seq_printf(seq, "%-32s\t%lu\n", | |
194 | itemlist[i].name, buff[i]); | |
195 | } else { | |
196 | for (i = 0; itemlist[i].name; i++) | |
197 | seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, | |
198 | atomic_long_read(smib + itemlist[i].entry)); | |
be281e55 | 199 | } |
1da177e4 LT |
200 | } |
201 | ||
698365fa | 202 | static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, |
4ce3c183 ED |
203 | const struct snmp_mib *itemlist, size_t syncpoff) |
204 | { | |
4a4857b1 | 205 | u64 buff64[SNMP_MIB_MAX]; |
4ce3c183 ED |
206 | int i; |
207 | ||
3500cd73 | 208 | memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); |
4a4857b1 JH |
209 | |
210 | snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); | |
4ce3c183 | 211 | for (i = 0; itemlist[i].name; i++) |
4a4857b1 | 212 | seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); |
4ce3c183 ED |
213 | } |
214 | ||
1da177e4 LT |
215 | static int snmp6_seq_show(struct seq_file *seq, void *v) |
216 | { | |
2b4209e4 DL |
217 | struct net *net = (struct net *)seq->private; |
218 | ||
698365fa | 219 | snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, |
4ce3c183 | 220 | snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); |
c9f2dba6 | 221 | snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, |
be281e55 | 222 | NULL, snmp6_icmp6_list); |
2a24444f | 223 | snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); |
c9f2dba6 | 224 | snmp6_seq_show_item(seq, net->mib.udp_stats_in6, |
be281e55 | 225 | NULL, snmp6_udp6_list); |
c9f2dba6 | 226 | snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, |
be281e55 | 227 | NULL, snmp6_udplite6_list); |
1da177e4 LT |
228 | return 0; |
229 | } | |
230 | ||
7b43ccec DL |
231 | static int snmp6_dev_seq_show(struct seq_file *seq, void *v) |
232 | { | |
233 | struct inet6_dev *idev = (struct inet6_dev *)seq->private; | |
234 | ||
235 | seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); | |
698365fa | 236 | snmp6_seq_show_item64(seq, idev->stats.ipv6, |
766e9f1b | 237 | snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); |
be281e55 | 238 | snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, |
7d720c3e | 239 | snmp6_icmp6_list); |
2a24444f | 240 | snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); |
7b43ccec DL |
241 | return 0; |
242 | } | |
243 | ||
1da177e4 LT |
244 | int snmp6_register_dev(struct inet6_dev *idev) |
245 | { | |
246 | struct proc_dir_entry *p; | |
835bcc04 | 247 | struct net *net; |
1da177e4 LT |
248 | |
249 | if (!idev || !idev->dev) | |
250 | return -EINVAL; | |
251 | ||
835bcc04 | 252 | net = dev_net(idev->dev); |
835bcc04 | 253 | if (!net->mib.proc_net_devsnmp6) |
1da177e4 LT |
254 | return -ENOENT; |
255 | ||
3f3942ac CH |
256 | p = proc_create_single_data(idev->dev->name, 0444, |
257 | net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev); | |
1da177e4 LT |
258 | if (!p) |
259 | return -ENOMEM; | |
260 | ||
1da177e4 LT |
261 | idev->stats.proc_dir_entry = p; |
262 | return 0; | |
263 | } | |
264 | ||
265 | int snmp6_unregister_dev(struct inet6_dev *idev) | |
266 | { | |
835bcc04 DL |
267 | struct net *net = dev_net(idev->dev); |
268 | if (!net->mib.proc_net_devsnmp6) | |
1da177e4 | 269 | return -ENOENT; |
c3f6c21d | 270 | if (!idev->stats.proc_dir_entry) |
1da177e4 | 271 | return -EINVAL; |
a8ca16ea | 272 | proc_remove(idev->stats.proc_dir_entry); |
5632c515 | 273 | idev->stats.proc_dir_entry = NULL; |
1da177e4 LT |
274 | return 0; |
275 | } | |
276 | ||
2c8c1e72 | 277 | static int __net_init ipv6_proc_init_net(struct net *net) |
d0538ca3 | 278 | { |
3617d949 CH |
279 | if (!proc_create_net_single("sockstat6", 0444, net->proc_net, |
280 | sockstat6_seq_show, NULL)) | |
d0538ca3 | 281 | return -ENOMEM; |
06f38527 | 282 | |
3617d949 CH |
283 | if (!proc_create_net_single("snmp6", 0444, net->proc_net, |
284 | snmp6_seq_show, NULL)) | |
06f38527 DL |
285 | goto proc_snmp6_fail; |
286 | ||
287 | net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); | |
288 | if (!net->mib.proc_net_devsnmp6) | |
289 | goto proc_dev_snmp6_fail; | |
d0538ca3 | 290 | return 0; |
06f38527 | 291 | |
4855d6f3 | 292 | proc_dev_snmp6_fail: |
ece31ffd | 293 | remove_proc_entry("snmp6", net->proc_net); |
06f38527 | 294 | proc_snmp6_fail: |
ece31ffd | 295 | remove_proc_entry("sockstat6", net->proc_net); |
06f38527 | 296 | return -ENOMEM; |
d0538ca3 PE |
297 | } |
298 | ||
2c8c1e72 | 299 | static void __net_exit ipv6_proc_exit_net(struct net *net) |
d0538ca3 | 300 | { |
ece31ffd G |
301 | remove_proc_entry("sockstat6", net->proc_net); |
302 | remove_proc_entry("dev_snmp6", net->proc_net); | |
303 | remove_proc_entry("snmp6", net->proc_net); | |
d0538ca3 PE |
304 | } |
305 | ||
306 | static struct pernet_operations ipv6_proc_ops = { | |
307 | .init = ipv6_proc_init_net, | |
308 | .exit = ipv6_proc_exit_net, | |
309 | }; | |
310 | ||
1da177e4 LT |
311 | int __init ipv6_misc_proc_init(void) |
312 | { | |
06f38527 | 313 | return register_pernet_subsys(&ipv6_proc_ops); |
1da177e4 LT |
314 | } |
315 | ||
316 | void ipv6_misc_proc_exit(void) | |
317 | { | |
d0538ca3 | 318 | unregister_pernet_subsys(&ipv6_proc_ops); |
1da177e4 | 319 | } |