1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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 | * |
11 | * Authors: David S. Miller (davem@caip.rutgers.edu) |
12 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> |
13 | */ |
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> |
20 | #include <linux/export.h> |
21 | #include <net/net_namespace.h> |
22 | #include <net/ip.h> |
23 | #include <net/sock.h> |
24 | #include <net/tcp.h> |
25 | #include <net/udp.h> |
26 | #include <net/transp_v6.h> |
27 | #include <net/ipv6.h> |
28 | |
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 | |
34 | static int sockstat6_seq_show(struct seq_file *seq, void *v) |
35 | { |
36 | struct net *net = seq->private; |
37 | |
38 | seq_printf(m: seq, fmt: "TCP6: inuse %d\n" , |
39 | sock_prot_inuse_get(net, proto: &tcpv6_prot)); |
40 | seq_printf(m: seq, fmt: "UDP6: inuse %d\n" , |
41 | sock_prot_inuse_get(net, proto: &udpv6_prot)); |
42 | seq_printf(m: seq, fmt: "UDPLITE6: inuse %d\n" , |
43 | sock_prot_inuse_get(net, proto: &udplitev6_prot)); |
44 | seq_printf(m: seq, fmt: "RAW6: inuse %d\n" , |
45 | sock_prot_inuse_get(net, proto: &rawv6_prot)); |
46 | seq_printf(m: seq, fmt: "FRAG6: inuse %u memory %lu\n" , |
47 | atomic_read(v: &net->ipv6.fqdir->rhashtable.nelems), |
48 | frag_mem_limit(fqdir: net->ipv6.fqdir)); |
49 | return 0; |
50 | } |
51 | |
52 | static const struct snmp_mib snmp6_ipstats_list[] = { |
53 | /* ipv6 mib according to RFC 2465 */ |
54 | SNMP_MIB_ITEM("Ip6InReceives" , IPSTATS_MIB_INPKTS), |
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), |
64 | SNMP_MIB_ITEM("Ip6OutRequests" , IPSTATS_MIB_OUTREQUESTS), |
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), |
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), |
82 | /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ |
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), |
87 | SNMP_MIB_ITEM("Ip6OutTransmits" , IPSTATS_MIB_OUTPKTS), |
88 | SNMP_MIB_SENTINEL |
89 | }; |
90 | |
91 | static const struct snmp_mib snmp6_icmp6_list[] = { |
92 | /* icmpv6 mib according to RFC 2466 */ |
93 | SNMP_MIB_ITEM("Icmp6InMsgs" , ICMP6_MIB_INMSGS), |
94 | SNMP_MIB_ITEM("Icmp6InErrors" , ICMP6_MIB_INERRORS), |
95 | SNMP_MIB_ITEM("Icmp6OutMsgs" , ICMP6_MIB_OUTMSGS), |
96 | SNMP_MIB_ITEM("Icmp6OutErrors" , ICMP6_MIB_OUTERRORS), |
97 | SNMP_MIB_ITEM("Icmp6InCsumErrors" , ICMP6_MIB_CSUMERRORS), |
98 | SNMP_MIB_ITEM("Icmp6OutRateLimitHost" , ICMP6_MIB_RATELIMITHOST), |
99 | SNMP_MIB_SENTINEL |
100 | }; |
101 | |
102 | /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ |
103 | static const char *const icmp6type2name[256] = { |
104 | [ICMPV6_DEST_UNREACH] = "DestUnreachs" , |
105 | [ICMPV6_PKT_TOOBIG] = "PktTooBigs" , |
106 | [ICMPV6_TIME_EXCEED] = "TimeExcds" , |
107 | [ICMPV6_PARAMPROB] = "ParmProblems" , |
108 | [ICMPV6_ECHO_REQUEST] = "Echos" , |
109 | [ICMPV6_ECHO_REPLY] = "EchoReplies" , |
110 | [ICMPV6_MGM_QUERY] = "GroupMembQueries" , |
111 | [ICMPV6_MGM_REPORT] = "GroupMembResponses" , |
112 | [ICMPV6_MGM_REDUCTION] = "GroupMembReductions" , |
113 | [ICMPV6_MLD2_REPORT] = "MLDv2Reports" , |
114 | [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements" , |
115 | [NDISC_ROUTER_SOLICITATION] = "RouterSolicits" , |
116 | [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements" , |
117 | [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits" , |
118 | [NDISC_REDIRECT] = "Redirects" , |
119 | }; |
120 | |
121 | |
122 | static const struct snmp_mib snmp6_udp6_list[] = { |
123 | SNMP_MIB_ITEM("Udp6InDatagrams" , UDP_MIB_INDATAGRAMS), |
124 | SNMP_MIB_ITEM("Udp6NoPorts" , UDP_MIB_NOPORTS), |
125 | SNMP_MIB_ITEM("Udp6InErrors" , UDP_MIB_INERRORS), |
126 | SNMP_MIB_ITEM("Udp6OutDatagrams" , UDP_MIB_OUTDATAGRAMS), |
127 | SNMP_MIB_ITEM("Udp6RcvbufErrors" , UDP_MIB_RCVBUFERRORS), |
128 | SNMP_MIB_ITEM("Udp6SndbufErrors" , UDP_MIB_SNDBUFERRORS), |
129 | SNMP_MIB_ITEM("Udp6InCsumErrors" , UDP_MIB_CSUMERRORS), |
130 | SNMP_MIB_ITEM("Udp6IgnoredMulti" , UDP_MIB_IGNOREDMULTI), |
131 | SNMP_MIB_ITEM("Udp6MemErrors" , UDP_MIB_MEMERRORS), |
132 | SNMP_MIB_SENTINEL |
133 | }; |
134 | |
135 | static const struct snmp_mib snmp6_udplite6_list[] = { |
136 | SNMP_MIB_ITEM("UdpLite6InDatagrams" , UDP_MIB_INDATAGRAMS), |
137 | SNMP_MIB_ITEM("UdpLite6NoPorts" , UDP_MIB_NOPORTS), |
138 | SNMP_MIB_ITEM("UdpLite6InErrors" , UDP_MIB_INERRORS), |
139 | SNMP_MIB_ITEM("UdpLite6OutDatagrams" , UDP_MIB_OUTDATAGRAMS), |
140 | SNMP_MIB_ITEM("UdpLite6RcvbufErrors" , UDP_MIB_RCVBUFERRORS), |
141 | SNMP_MIB_ITEM("UdpLite6SndbufErrors" , UDP_MIB_SNDBUFERRORS), |
142 | SNMP_MIB_ITEM("UdpLite6InCsumErrors" , UDP_MIB_CSUMERRORS), |
143 | SNMP_MIB_ITEM("UdpLite6MemErrors" , UDP_MIB_MEMERRORS), |
144 | SNMP_MIB_SENTINEL |
145 | }; |
146 | |
147 | static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) |
148 | { |
149 | char name[32]; |
150 | int i; |
151 | |
152 | /* print by name -- deprecated items */ |
153 | for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { |
154 | int icmptype; |
155 | const char *p; |
156 | |
157 | icmptype = i & 0xff; |
158 | p = icmp6type2name[icmptype]; |
159 | if (!p) /* don't print un-named types here */ |
160 | continue; |
161 | snprintf(buf: name, size: sizeof(name), fmt: "Icmp6%s%s" , |
162 | i & 0x100 ? "Out" : "In" , p); |
163 | seq_printf(m: seq, fmt: "%-32s\t%lu\n" , name, |
164 | atomic_long_read(v: smib + i)); |
165 | } |
166 | |
167 | /* print by number (nonzero only) - ICMPMsgStat format */ |
168 | for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { |
169 | unsigned long val; |
170 | |
171 | val = atomic_long_read(v: smib + i); |
172 | if (!val) |
173 | continue; |
174 | snprintf(buf: name, size: sizeof(name), fmt: "Icmp6%sType%u" , |
175 | i & 0x100 ? "Out" : "In" , i & 0xff); |
176 | seq_printf(m: seq, fmt: "%-32s\t%lu\n" , name, val); |
177 | } |
178 | } |
179 | |
180 | /* can be called either with percpu mib (pcpumib != NULL), |
181 | * or shared one (smib != NULL) |
182 | */ |
183 | static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, |
184 | atomic_long_t *smib, |
185 | const struct snmp_mib *itemlist) |
186 | { |
187 | unsigned long buff[SNMP_MIB_MAX]; |
188 | int i; |
189 | |
190 | if (pcpumib) { |
191 | memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); |
192 | |
193 | snmp_get_cpu_field_batch(buff, itemlist, pcpumib); |
194 | for (i = 0; itemlist[i].name; i++) |
195 | seq_printf(m: seq, fmt: "%-32s\t%lu\n" , |
196 | itemlist[i].name, buff[i]); |
197 | } else { |
198 | for (i = 0; itemlist[i].name; i++) |
199 | seq_printf(m: seq, fmt: "%-32s\t%lu\n" , itemlist[i].name, |
200 | atomic_long_read(v: smib + itemlist[i].entry)); |
201 | } |
202 | } |
203 | |
204 | static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, |
205 | const struct snmp_mib *itemlist, size_t syncpoff) |
206 | { |
207 | u64 buff64[SNMP_MIB_MAX]; |
208 | int i; |
209 | |
210 | memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); |
211 | |
212 | snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); |
213 | for (i = 0; itemlist[i].name; i++) |
214 | seq_printf(m: seq, fmt: "%-32s\t%llu\n" , itemlist[i].name, buff64[i]); |
215 | } |
216 | |
217 | static int snmp6_seq_show(struct seq_file *seq, void *v) |
218 | { |
219 | struct net *net = (struct net *)seq->private; |
220 | |
221 | snmp6_seq_show_item64(seq, mib: net->mib.ipv6_statistics, |
222 | itemlist: snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); |
223 | snmp6_seq_show_item(seq, pcpumib: net->mib.icmpv6_statistics, |
224 | NULL, itemlist: snmp6_icmp6_list); |
225 | snmp6_seq_show_icmpv6msg(seq, smib: net->mib.icmpv6msg_statistics->mibs); |
226 | snmp6_seq_show_item(seq, pcpumib: net->mib.udp_stats_in6, |
227 | NULL, itemlist: snmp6_udp6_list); |
228 | snmp6_seq_show_item(seq, pcpumib: net->mib.udplite_stats_in6, |
229 | NULL, itemlist: snmp6_udplite6_list); |
230 | return 0; |
231 | } |
232 | |
233 | static int snmp6_dev_seq_show(struct seq_file *seq, void *v) |
234 | { |
235 | struct inet6_dev *idev = (struct inet6_dev *)seq->private; |
236 | |
237 | seq_printf(m: seq, fmt: "%-32s\t%u\n" , "ifIndex" , idev->dev->ifindex); |
238 | snmp6_seq_show_item64(seq, mib: idev->stats.ipv6, |
239 | itemlist: snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); |
240 | snmp6_seq_show_item(seq, NULL, smib: idev->stats.icmpv6dev->mibs, |
241 | itemlist: snmp6_icmp6_list); |
242 | snmp6_seq_show_icmpv6msg(seq, smib: idev->stats.icmpv6msgdev->mibs); |
243 | return 0; |
244 | } |
245 | |
246 | int snmp6_register_dev(struct inet6_dev *idev) |
247 | { |
248 | struct proc_dir_entry *p; |
249 | struct net *net; |
250 | |
251 | if (!idev || !idev->dev) |
252 | return -EINVAL; |
253 | |
254 | net = dev_net(dev: idev->dev); |
255 | if (!net->mib.proc_net_devsnmp6) |
256 | return -ENOENT; |
257 | |
258 | p = proc_create_single_data(name: idev->dev->name, mode: 0444, |
259 | parent: net->mib.proc_net_devsnmp6, show: snmp6_dev_seq_show, data: idev); |
260 | if (!p) |
261 | return -ENOMEM; |
262 | |
263 | idev->stats.proc_dir_entry = p; |
264 | return 0; |
265 | } |
266 | |
267 | int snmp6_unregister_dev(struct inet6_dev *idev) |
268 | { |
269 | struct net *net = dev_net(dev: idev->dev); |
270 | if (!net->mib.proc_net_devsnmp6) |
271 | return -ENOENT; |
272 | if (!idev->stats.proc_dir_entry) |
273 | return -EINVAL; |
274 | proc_remove(idev->stats.proc_dir_entry); |
275 | idev->stats.proc_dir_entry = NULL; |
276 | return 0; |
277 | } |
278 | |
279 | static int __net_init ipv6_proc_init_net(struct net *net) |
280 | { |
281 | if (!proc_create_net_single(name: "sockstat6" , mode: 0444, parent: net->proc_net, |
282 | show: sockstat6_seq_show, NULL)) |
283 | return -ENOMEM; |
284 | |
285 | if (!proc_create_net_single(name: "snmp6" , mode: 0444, parent: net->proc_net, |
286 | show: snmp6_seq_show, NULL)) |
287 | goto proc_snmp6_fail; |
288 | |
289 | net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6" , net->proc_net); |
290 | if (!net->mib.proc_net_devsnmp6) |
291 | goto proc_dev_snmp6_fail; |
292 | return 0; |
293 | |
294 | proc_dev_snmp6_fail: |
295 | remove_proc_entry("snmp6" , net->proc_net); |
296 | proc_snmp6_fail: |
297 | remove_proc_entry("sockstat6" , net->proc_net); |
298 | return -ENOMEM; |
299 | } |
300 | |
301 | static void __net_exit ipv6_proc_exit_net(struct net *net) |
302 | { |
303 | remove_proc_entry("sockstat6" , net->proc_net); |
304 | remove_proc_entry("dev_snmp6" , net->proc_net); |
305 | remove_proc_entry("snmp6" , net->proc_net); |
306 | } |
307 | |
308 | static struct pernet_operations ipv6_proc_ops = { |
309 | .init = ipv6_proc_init_net, |
310 | .exit = ipv6_proc_exit_net, |
311 | }; |
312 | |
313 | int __init ipv6_misc_proc_init(void) |
314 | { |
315 | return register_pernet_subsys(&ipv6_proc_ops); |
316 | } |
317 | |
318 | void ipv6_misc_proc_exit(void) |
319 | { |
320 | unregister_pernet_subsys(&ipv6_proc_ops); |
321 | } |
322 | |