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
34static 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
52static 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};
89
90static const struct snmp_mib snmp6_icmp6_list[] = {
91/* icmpv6 mib according to RFC 2466 */
92 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
93 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
94 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
95 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
96 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
97/* ICMP6_MIB_RATELIMITHOST needs to be last, see snmp6_dev_seq_show(). */
98 SNMP_MIB_ITEM("Icmp6OutRateLimitHost", ICMP6_MIB_RATELIMITHOST),
99};
100
101static const struct snmp_mib snmp6_udp6_list[] = {
102 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
103 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
104 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
105 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
106 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
107 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
108 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
109 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
110 SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS),
111};
112
113static const struct snmp_mib snmp6_udplite6_list[] = {
114 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
115 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
116 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
117 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
118 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
119 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
120 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
121 SNMP_MIB_ITEM("UdpLite6MemErrors", UDP_MIB_MEMERRORS),
122};
123
124static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
125{
126 char name[32];
127 int i;
128
129 /* print by name -- deprecated items */
130 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
131 const char *p = NULL;
132 int icmptype;
133
134#define CASE(TYP, STR) case TYP: p = STR; break;
135
136 icmptype = i & 0xff;
137 switch (icmptype) {
138/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
139 CASE(ICMPV6_DEST_UNREACH, "DestUnreachs")
140 CASE(ICMPV6_PKT_TOOBIG, "PktTooBigs")
141 CASE(ICMPV6_TIME_EXCEED, "TimeExcds")
142 CASE(ICMPV6_PARAMPROB, "ParmProblems")
143 CASE(ICMPV6_ECHO_REQUEST, "Echos")
144 CASE(ICMPV6_ECHO_REPLY, "EchoReplies")
145 CASE(ICMPV6_MGM_QUERY, "GroupMembQueries")
146 CASE(ICMPV6_MGM_REPORT, "GroupMembResponses")
147 CASE(ICMPV6_MGM_REDUCTION, "GroupMembReductions")
148 CASE(ICMPV6_MLD2_REPORT, "MLDv2Reports")
149 CASE(NDISC_ROUTER_ADVERTISEMENT, "RouterAdvertisements")
150 CASE(NDISC_ROUTER_SOLICITATION, "RouterSolicits")
151 CASE(NDISC_NEIGHBOUR_ADVERTISEMENT, "NeighborAdvertisements")
152 CASE(NDISC_NEIGHBOUR_SOLICITATION, "NeighborSolicits")
153 CASE(NDISC_REDIRECT, "Redirects")
154 }
155#undef CASE
156 if (!p) /* don't print un-named types here */
157 continue;
158 snprintf(buf: name, size: sizeof(name), fmt: "Icmp6%s%s",
159 i & 0x100 ? "Out" : "In", p);
160 seq_printf(m: seq, fmt: "%-32s\t%lu\n", name,
161 atomic_long_read(v: smib + i));
162 }
163
164 /* print by number (nonzero only) - ICMPMsgStat format */
165 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
166 unsigned long val;
167
168 val = atomic_long_read(v: smib + i);
169 if (!val)
170 continue;
171 snprintf(buf: name, size: sizeof(name), fmt: "Icmp6%sType%u",
172 i & 0x100 ? "Out" : "In", i & 0xff);
173 seq_printf(m: seq, fmt: "%-32s\t%lu\n", name, val);
174 }
175}
176
177/* can be called either with percpu mib (pcpumib != NULL),
178 * or shared one (smib != NULL)
179 */
180static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
181 atomic_long_t *smib,
182 const struct snmp_mib *itemlist,
183 int cnt)
184{
185 unsigned long buff[SNMP_MIB_MAX];
186 int i;
187
188 if (pcpumib) {
189 memset(s: buff, c: 0, n: sizeof(unsigned long) * cnt);
190
191 snmp_get_cpu_field_batch_cnt(buff, itemlist, cnt, pcpumib);
192 for (i = 0; i < cnt; i++)
193 seq_printf(m: seq, fmt: "%-32s\t%lu\n",
194 itemlist[i].name, buff[i]);
195 } else {
196 for (i = 0; i < cnt; i++)
197 seq_printf(m: seq, fmt: "%-32s\t%lu\n", itemlist[i].name,
198 atomic_long_read(v: smib + itemlist[i].entry));
199 }
200}
201
202static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
203 const struct snmp_mib *itemlist,
204 int cnt, size_t syncpoff)
205{
206 u64 buff64[SNMP_MIB_MAX];
207 int i;
208
209 memset(s: buff64, c: 0, n: sizeof(u64) * cnt);
210
211 snmp_get_cpu_field64_batch_cnt(buff64, itemlist, cnt, mib, syncpoff);
212 for (i = 0; i < cnt; i++)
213 seq_printf(m: seq, fmt: "%-32s\t%llu\n", itemlist[i].name, buff64[i]);
214}
215
216static int snmp6_seq_show(struct seq_file *seq, void *v)
217{
218 struct net *net = (struct net *)seq->private;
219
220 snmp6_seq_show_item64(seq, mib: net->mib.ipv6_statistics,
221 itemlist: snmp6_ipstats_list,
222 ARRAY_SIZE(snmp6_ipstats_list),
223 offsetof(struct ipstats_mib, syncp));
224 snmp6_seq_show_item(seq, pcpumib: net->mib.icmpv6_statistics,
225 NULL, itemlist: snmp6_icmp6_list,
226 ARRAY_SIZE(snmp6_icmp6_list));
227 snmp6_seq_show_icmpv6msg(seq, smib: net->mib.icmpv6msg_statistics->mibs);
228 snmp6_seq_show_item(seq, pcpumib: net->mib.udp_stats_in6,
229 NULL, itemlist: snmp6_udp6_list,
230 ARRAY_SIZE(snmp6_udp6_list));
231 snmp6_seq_show_item(seq, pcpumib: net->mib.udplite_stats_in6,
232 NULL, itemlist: snmp6_udplite6_list,
233 ARRAY_SIZE(snmp6_udplite6_list));
234 return 0;
235}
236
237static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
238{
239 struct inet6_dev *idev = (struct inet6_dev *)seq->private;
240
241 seq_printf(m: seq, fmt: "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
242 snmp6_seq_show_item64(seq, mib: idev->stats.ipv6,
243 itemlist: snmp6_ipstats_list,
244 ARRAY_SIZE(snmp6_ipstats_list),
245 offsetof(struct ipstats_mib, syncp));
246
247 /* Per idev icmp stats do not have ICMP6_MIB_RATELIMITHOST */
248 snmp6_seq_show_item(seq, NULL, smib: idev->stats.icmpv6dev->mibs,
249 itemlist: snmp6_icmp6_list, ARRAY_SIZE(snmp6_icmp6_list) - 1);
250
251 snmp6_seq_show_icmpv6msg(seq, smib: idev->stats.icmpv6msgdev->mibs);
252 return 0;
253}
254
255int snmp6_register_dev(struct inet6_dev *idev)
256{
257 struct proc_dir_entry *p;
258 struct net *net;
259
260 if (!idev || !idev->dev)
261 return -EINVAL;
262
263 net = dev_net(dev: idev->dev);
264 if (!net->mib.proc_net_devsnmp6)
265 return -ENOENT;
266
267 p = proc_create_single_data(name: idev->dev->name, mode: 0444,
268 parent: net->mib.proc_net_devsnmp6, show: snmp6_dev_seq_show, data: idev);
269 if (!p)
270 return -ENOMEM;
271
272 idev->stats.proc_dir_entry = p;
273 return 0;
274}
275
276int snmp6_unregister_dev(struct inet6_dev *idev)
277{
278 struct net *net = dev_net(dev: idev->dev);
279 if (!net->mib.proc_net_devsnmp6)
280 return -ENOENT;
281 if (!idev->stats.proc_dir_entry)
282 return -EINVAL;
283 proc_remove(idev->stats.proc_dir_entry);
284 idev->stats.proc_dir_entry = NULL;
285 return 0;
286}
287
288static int __net_init ipv6_proc_init_net(struct net *net)
289{
290 if (!proc_create_net_single(name: "sockstat6", mode: 0444, parent: net->proc_net,
291 show: sockstat6_seq_show, NULL))
292 return -ENOMEM;
293
294 if (!proc_create_net_single(name: "snmp6", mode: 0444, parent: net->proc_net,
295 show: snmp6_seq_show, NULL))
296 goto proc_snmp6_fail;
297
298 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
299 if (!net->mib.proc_net_devsnmp6)
300 goto proc_dev_snmp6_fail;
301 return 0;
302
303proc_dev_snmp6_fail:
304 remove_proc_entry("snmp6", net->proc_net);
305proc_snmp6_fail:
306 remove_proc_entry("sockstat6", net->proc_net);
307 return -ENOMEM;
308}
309
310static void __net_exit ipv6_proc_exit_net(struct net *net)
311{
312 remove_proc_entry("sockstat6", net->proc_net);
313 remove_proc_entry("dev_snmp6", net->proc_net);
314 remove_proc_entry("snmp6", net->proc_net);
315}
316
317static struct pernet_operations ipv6_proc_ops = {
318 .init = ipv6_proc_init_net,
319 .exit = ipv6_proc_exit_net,
320};
321
322int __init ipv6_misc_proc_init(void)
323{
324 return register_pernet_subsys(&ipv6_proc_ops);
325}
326
327void ipv6_misc_proc_exit(void)
328{
329 unregister_pernet_subsys(&ipv6_proc_ops);
330}
331