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f2fs: Provide a splice-read wrapper
[linux-block.git] / net / ipv6 / proc.c
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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(seq, "TCP6: inuse %d\n",
39 sock_prot_inuse_get(net, &tcpv6_prot));
40 seq_printf(seq, "UDP6: inuse %d\n",
41 sock_prot_inuse_get(net, &udpv6_prot));
42 seq_printf(seq, "UDPLITE6: inuse %d\n",
43 sock_prot_inuse_get(net, &udplitev6_prot));
44 seq_printf(seq, "RAW6: inuse %d\n",
45 sock_prot_inuse_get(net, &rawv6_prot));
46 seq_printf(seq, "FRAG6: inuse %u memory %lu\n",
47 atomic_read(&net->ipv6.fqdir->rhashtable.nelems),
48 frag_mem_limit(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_OUTPKTS),
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_SENTINEL
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 SNMP_MIB_ITEM("Icmp6OutRateLimitHost", ICMP6_MIB_RATELIMITHOST),
98 SNMP_MIB_SENTINEL
99};
100
101/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
102static const char *const icmp6type2name[256] = {
103 [ICMPV6_DEST_UNREACH] = "DestUnreachs",
104 [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
105 [ICMPV6_TIME_EXCEED] = "TimeExcds",
106 [ICMPV6_PARAMPROB] = "ParmProblems",
107 [ICMPV6_ECHO_REQUEST] = "Echos",
108 [ICMPV6_ECHO_REPLY] = "EchoReplies",
109 [ICMPV6_MGM_QUERY] = "GroupMembQueries",
110 [ICMPV6_MGM_REPORT] = "GroupMembResponses",
111 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
112 [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
113 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
114 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
115 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
116 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
117 [NDISC_REDIRECT] = "Redirects",
118};
119
120
121static const struct snmp_mib snmp6_udp6_list[] = {
122 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
123 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
124 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
125 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
126 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
127 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
128 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
129 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
130 SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS),
131 SNMP_MIB_SENTINEL
132};
133
134static const struct snmp_mib snmp6_udplite6_list[] = {
135 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
136 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
137 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
138 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
139 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
140 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
141 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
142 SNMP_MIB_ITEM("UdpLite6MemErrors", UDP_MIB_MEMERRORS),
143 SNMP_MIB_SENTINEL
144};
145
146static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
147{
148 char name[32];
149 int i;
150
151 /* print by name -- deprecated items */
152 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
153 int icmptype;
154 const char *p;
155
156 icmptype = i & 0xff;
157 p = icmp6type2name[icmptype];
158 if (!p) /* don't print un-named types here */
159 continue;
160 snprintf(name, sizeof(name), "Icmp6%s%s",
161 i & 0x100 ? "Out" : "In", p);
162 seq_printf(seq, "%-32s\t%lu\n", name,
163 atomic_long_read(smib + i));
164 }
165
166 /* print by number (nonzero only) - ICMPMsgStat format */
167 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
168 unsigned long val;
169
170 val = atomic_long_read(smib + i);
171 if (!val)
172 continue;
173 snprintf(name, sizeof(name), "Icmp6%sType%u",
174 i & 0x100 ? "Out" : "In", i & 0xff);
175 seq_printf(seq, "%-32s\t%lu\n", name, val);
176 }
177}
178
179/* can be called either with percpu mib (pcpumib != NULL),
180 * or shared one (smib != NULL)
181 */
182static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
183 atomic_long_t *smib,
184 const struct snmp_mib *itemlist)
185{
186 unsigned long buff[SNMP_MIB_MAX];
187 int i;
188
189 if (pcpumib) {
190 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX);
191
192 snmp_get_cpu_field_batch(buff, itemlist, pcpumib);
193 for (i = 0; itemlist[i].name; i++)
194 seq_printf(seq, "%-32s\t%lu\n",
195 itemlist[i].name, buff[i]);
196 } else {
197 for (i = 0; itemlist[i].name; i++)
198 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
199 atomic_long_read(smib + itemlist[i].entry));
200 }
201}
202
203static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
204 const struct snmp_mib *itemlist, size_t syncpoff)
205{
206 u64 buff64[SNMP_MIB_MAX];
207 int i;
208
209 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX);
210
211 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff);
212 for (i = 0; itemlist[i].name; i++)
213 seq_printf(seq, "%-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, net->mib.ipv6_statistics,
221 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
222 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
223 NULL, snmp6_icmp6_list);
224 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
225 snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
226 NULL, snmp6_udp6_list);
227 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
228 NULL, snmp6_udplite6_list);
229 return 0;
230}
231
232static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
233{
234 struct inet6_dev *idev = (struct inet6_dev *)seq->private;
235
236 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
237 snmp6_seq_show_item64(seq, idev->stats.ipv6,
238 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
239 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
240 snmp6_icmp6_list);
241 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
242 return 0;
243}
244
245int snmp6_register_dev(struct inet6_dev *idev)
246{
247 struct proc_dir_entry *p;
248 struct net *net;
249
250 if (!idev || !idev->dev)
251 return -EINVAL;
252
253 net = dev_net(idev->dev);
254 if (!net->mib.proc_net_devsnmp6)
255 return -ENOENT;
256
257 p = proc_create_single_data(idev->dev->name, 0444,
258 net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev);
259 if (!p)
260 return -ENOMEM;
261
262 idev->stats.proc_dir_entry = p;
263 return 0;
264}
265
266int snmp6_unregister_dev(struct inet6_dev *idev)
267{
268 struct net *net = dev_net(idev->dev);
269 if (!net->mib.proc_net_devsnmp6)
270 return -ENOENT;
271 if (!idev->stats.proc_dir_entry)
272 return -EINVAL;
273 proc_remove(idev->stats.proc_dir_entry);
274 idev->stats.proc_dir_entry = NULL;
275 return 0;
276}
277
278static int __net_init ipv6_proc_init_net(struct net *net)
279{
280 if (!proc_create_net_single("sockstat6", 0444, net->proc_net,
281 sockstat6_seq_show, NULL))
282 return -ENOMEM;
283
284 if (!proc_create_net_single("snmp6", 0444, net->proc_net,
285 snmp6_seq_show, NULL))
286 goto proc_snmp6_fail;
287
288 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
289 if (!net->mib.proc_net_devsnmp6)
290 goto proc_dev_snmp6_fail;
291 return 0;
292
293proc_dev_snmp6_fail:
294 remove_proc_entry("snmp6", net->proc_net);
295proc_snmp6_fail:
296 remove_proc_entry("sockstat6", net->proc_net);
297 return -ENOMEM;
298}
299
300static void __net_exit ipv6_proc_exit_net(struct net *net)
301{
302 remove_proc_entry("sockstat6", net->proc_net);
303 remove_proc_entry("dev_snmp6", net->proc_net);
304 remove_proc_entry("snmp6", net->proc_net);
305}
306
307static struct pernet_operations ipv6_proc_ops = {
308 .init = ipv6_proc_init_net,
309 .exit = ipv6_proc_exit_net,
310};
311
312int __init ipv6_misc_proc_init(void)
313{
314 return register_pernet_subsys(&ipv6_proc_ops);
315}
316
317void ipv6_misc_proc_exit(void)
318{
319 unregister_pernet_subsys(&ipv6_proc_ops);
320}
Linux 6.x block layer and io_uring tree(s)