Merge tag 'mm-hotfixes-stable-2025-07-11-16-16' of git://git.kernel.org/pub/scm/linux...
[linux-block.git] / net / ipv6 / proc.c
CommitLineData
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 29#define MAX4(a, b, c, d) \
4477b39c 30 MAX_T(u32, MAX_T(u32, a, b), MAX_T(u32, c, d))
4a4857b1
JH
31#define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \
32 IPSTATS_MIB_MAX, ICMP_MIB_MAX)
33
1da177e4
LT
34static 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 52static 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),
b4a11b20 64 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
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),
b4a11b20 87 SNMP_MIB_ITEM("Ip6OutTransmits", IPSTATS_MIB_OUTPKTS),
1da177e4
LT
88 SNMP_MIB_SENTINEL
89};
90
5833929c 91static const struct snmp_mib snmp6_icmp6_list[] = {
14878f75 92/* icmpv6 mib according to RFC 2466 */
1da177e4
LT
93 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
94 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
1da177e4 95 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
1f8438a8 96 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
6a5dc9e5 97 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
d0941130 98 SNMP_MIB_ITEM("Icmp6OutRateLimitHost", ICMP6_MIB_RATELIMITHOST),
1da177e4
LT
99 SNMP_MIB_SENTINEL
100};
101
14878f75 102/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
36cbd3dc 103static const char *const icmp6type2name[256] = {
14878f75
DS
104 [ICMPV6_DEST_UNREACH] = "DestUnreachs",
105 [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
106 [ICMPV6_TIME_EXCEED] = "TimeExcds",
107 [ICMPV6_PARAMPROB] = "ParmProblems",
fa95c283 108 [ICMPV6_ECHO_REQUEST] = "Echos",
14878f75
DS
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",
fa95c283 118 [NDISC_REDIRECT] = "Redirects",
14878f75
DS
119};
120
121
5833929c 122static const struct snmp_mib snmp6_udp6_list[] = {
1da177e4
LT
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),
870be392
ED
127 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
128 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 129 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
36cbb245 130 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
a3ce2b10 131 SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS),
1da177e4
LT
132 SNMP_MIB_SENTINEL
133};
134
5833929c 135static const struct snmp_mib snmp6_udplite6_list[] = {
ba4e58ec
GR
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),
870be392
ED
140 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
141 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
6a5dc9e5 142 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
a3ce2b10 143 SNMP_MIB_ITEM("UdpLite6MemErrors", UDP_MIB_MEMERRORS),
ba4e58ec
GR
144 SNMP_MIB_SENTINEL
145};
146
2a24444f 147static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
14878f75 148{
5ece6c2d 149 char name[32];
14878f75
DS
150 int i;
151
152 /* print by name -- deprecated items */
153 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
154 int icmptype;
36cbd3dc 155 const char *p;
14878f75
DS
156
157 icmptype = i & 0xff;
158 p = icmp6type2name[icmptype];
159 if (!p) /* don't print un-named types here */
160 continue;
5ece6c2d 161 snprintf(name, sizeof(name), "Icmp6%s%s",
14878f75
DS
162 i & 0x100 ? "Out" : "In", p);
163 seq_printf(seq, "%-32s\t%lu\n", name,
2a24444f 164 atomic_long_read(smib + i));
14878f75
DS
165 }
166
167 /* print by number (nonzero only) - ICMPMsgStat format */
168 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
169 unsigned long val;
170
2a24444f 171 val = atomic_long_read(smib + i);
14878f75
DS
172 if (!val)
173 continue;
5ece6c2d 174 snprintf(name, sizeof(name), "Icmp6%sType%u",
14878f75
DS
175 i & 0x100 ? "Out" : "In", i & 0xff);
176 seq_printf(seq, "%-32s\t%lu\n", name, val);
177 }
14878f75
DS
178}
179
be281e55
ED
180/* can be called either with percpu mib (pcpumib != NULL),
181 * or shared one (smib != NULL)
182 */
c9f2dba6 183static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
be281e55 184 atomic_long_t *smib,
5833929c 185 const struct snmp_mib *itemlist)
1da177e4 186{
4a4857b1 187 unsigned long buff[SNMP_MIB_MAX];
1da177e4 188 int i;
4ce3c183 189
4a4857b1
JH
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(seq, "%-32s\t%lu\n",
196 itemlist[i].name, buff[i]);
197 } else {
198 for (i = 0; itemlist[i].name; i++)
199 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
200 atomic_long_read(smib + itemlist[i].entry));
be281e55 201 }
1da177e4
LT
202}
203
698365fa 204static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
4ce3c183
ED
205 const struct snmp_mib *itemlist, size_t syncpoff)
206{
4a4857b1 207 u64 buff64[SNMP_MIB_MAX];
4ce3c183
ED
208 int i;
209
3500cd73 210 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX);
4a4857b1
JH
211
212 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff);
4ce3c183 213 for (i = 0; itemlist[i].name; i++)
4a4857b1 214 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]);
4ce3c183
ED
215}
216
1da177e4
LT
217static int snmp6_seq_show(struct seq_file *seq, void *v)
218{
2b4209e4
DL
219 struct net *net = (struct net *)seq->private;
220
698365fa 221 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,
4ce3c183 222 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
c9f2dba6 223 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
be281e55 224 NULL, snmp6_icmp6_list);
2a24444f 225 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
c9f2dba6 226 snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
be281e55 227 NULL, snmp6_udp6_list);
c9f2dba6 228 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
be281e55 229 NULL, snmp6_udplite6_list);
1da177e4
LT
230 return 0;
231}
232
7b43ccec
DL
233static 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(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
698365fa 238 snmp6_seq_show_item64(seq, idev->stats.ipv6,
766e9f1b 239 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
be281e55 240 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
7d720c3e 241 snmp6_icmp6_list);
2a24444f 242 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
7b43ccec
DL
243 return 0;
244}
245
1da177e4
LT
246int snmp6_register_dev(struct inet6_dev *idev)
247{
248 struct proc_dir_entry *p;
835bcc04 249 struct net *net;
1da177e4
LT
250
251 if (!idev || !idev->dev)
252 return -EINVAL;
253
835bcc04 254 net = dev_net(idev->dev);
835bcc04 255 if (!net->mib.proc_net_devsnmp6)
1da177e4
LT
256 return -ENOENT;
257
3f3942ac
CH
258 p = proc_create_single_data(idev->dev->name, 0444,
259 net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev);
1da177e4
LT
260 if (!p)
261 return -ENOMEM;
262
1da177e4
LT
263 idev->stats.proc_dir_entry = p;
264 return 0;
265}
266
267int snmp6_unregister_dev(struct inet6_dev *idev)
268{
835bcc04
DL
269 struct net *net = dev_net(idev->dev);
270 if (!net->mib.proc_net_devsnmp6)
1da177e4 271 return -ENOENT;
c3f6c21d 272 if (!idev->stats.proc_dir_entry)
1da177e4 273 return -EINVAL;
a8ca16ea 274 proc_remove(idev->stats.proc_dir_entry);
5632c515 275 idev->stats.proc_dir_entry = NULL;
1da177e4
LT
276 return 0;
277}
278
2c8c1e72 279static int __net_init ipv6_proc_init_net(struct net *net)
d0538ca3 280{
3617d949
CH
281 if (!proc_create_net_single("sockstat6", 0444, net->proc_net,
282 sockstat6_seq_show, NULL))
d0538ca3 283 return -ENOMEM;
06f38527 284
3617d949
CH
285 if (!proc_create_net_single("snmp6", 0444, net->proc_net,
286 snmp6_seq_show, NULL))
06f38527
DL
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;
d0538ca3 292 return 0;
06f38527 293
4855d6f3 294proc_dev_snmp6_fail:
ece31ffd 295 remove_proc_entry("snmp6", net->proc_net);
06f38527 296proc_snmp6_fail:
ece31ffd 297 remove_proc_entry("sockstat6", net->proc_net);
06f38527 298 return -ENOMEM;
d0538ca3
PE
299}
300
2c8c1e72 301static void __net_exit ipv6_proc_exit_net(struct net *net)
d0538ca3 302{
ece31ffd
G
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);
d0538ca3
PE
306}
307
308static struct pernet_operations ipv6_proc_ops = {
309 .init = ipv6_proc_init_net,
310 .exit = ipv6_proc_exit_net,
311};
312
1da177e4
LT
313int __init ipv6_misc_proc_init(void)
314{
06f38527 315 return register_pernet_subsys(&ipv6_proc_ops);
1da177e4
LT
316}
317
318void ipv6_misc_proc_exit(void)
319{
d0538ca3 320 unregister_pernet_subsys(&ipv6_proc_ops);
1da177e4 321}