tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * This file implements the various access functions for the
7 * PROC file system. This is very similar to the IPv4 version,
8 * except it reports the sockets in the INET6 address family.
9 *
10 * Authors: David S. Miller (davem@caip.rutgers.edu)
11 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18#include <linux/socket.h>
19#include <linux/net.h>
20#include <linux/ipv6.h>
21#include <linux/proc_fs.h>
22#include <linux/seq_file.h>
23#include <linux/stddef.h>
24#include <linux/export.h>
25#include <net/net_namespace.h>
26#include <net/ip.h>
27#include <net/sock.h>
28#include <net/tcp.h>
29#include <net/udp.h>
30#include <net/transp_v6.h>
31#include <net/ipv6.h>
32
33static int sockstat6_seq_show(struct seq_file *seq, void *v)
34{
35 struct net *net = seq->private;
36
37 seq_printf(seq, "TCP6: inuse %d\n",
38 sock_prot_inuse_get(net, &tcpv6_prot));
39 seq_printf(seq, "UDP6: inuse %d\n",
40 sock_prot_inuse_get(net, &udpv6_prot));
41 seq_printf(seq, "UDPLITE6: inuse %d\n",
42 sock_prot_inuse_get(net, &udplitev6_prot));
43 seq_printf(seq, "RAW6: inuse %d\n",
44 sock_prot_inuse_get(net, &rawv6_prot));
45 seq_printf(seq, "FRAG6: inuse %d memory %d\n",
46 ip6_frag_nqueues(net), ip6_frag_mem(net));
47 return 0;
48}
49
50static int sockstat6_seq_open(struct inode *inode, struct file *file)
51{
52 return single_open_net(inode, file, sockstat6_seq_show);
53}
54
55static const struct file_operations sockstat6_seq_fops = {
56 .owner = THIS_MODULE,
57 .open = sockstat6_seq_open,
58 .read = seq_read,
59 .llseek = seq_lseek,
60 .release = single_release_net,
61};
62
63static const struct snmp_mib snmp6_ipstats_list[] = {
64/* ipv6 mib according to RFC 2465 */
65 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
66 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
67 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
68 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
69 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
70 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
71 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
72 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
73 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
74 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
75 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
76 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
77 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
78 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
79 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
80 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
81 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
82 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
83 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
84 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
85 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
86 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
87 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
88 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
89 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
90 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
91 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
92 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
93 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */
94 SNMP_MIB_SENTINEL
95};
96
97static const struct snmp_mib snmp6_icmp6_list[] = {
98/* icmpv6 mib according to RFC 2466 */
99 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
100 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
101 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
102 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
103 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
104 SNMP_MIB_SENTINEL
105};
106
107/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
108static const char *const icmp6type2name[256] = {
109 [ICMPV6_DEST_UNREACH] = "DestUnreachs",
110 [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
111 [ICMPV6_TIME_EXCEED] = "TimeExcds",
112 [ICMPV6_PARAMPROB] = "ParmProblems",
113 [ICMPV6_ECHO_REQUEST] = "Echos",
114 [ICMPV6_ECHO_REPLY] = "EchoReplies",
115 [ICMPV6_MGM_QUERY] = "GroupMembQueries",
116 [ICMPV6_MGM_REPORT] = "GroupMembResponses",
117 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
118 [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
119 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
120 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
121 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
122 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
123 [NDISC_REDIRECT] = "Redirects",
124};
125
126
127static const struct snmp_mib snmp6_udp6_list[] = {
128 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
129 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
130 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
131 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
132 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
133 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
134 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
135 SNMP_MIB_SENTINEL
136};
137
138static const struct snmp_mib snmp6_udplite6_list[] = {
139 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
140 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
141 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
142 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
143 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
144 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
145 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
146 SNMP_MIB_SENTINEL
147};
148
149static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
150{
151 char name[32];
152 int i;
153
154 /* print by name -- deprecated items */
155 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
156 int icmptype;
157 const char *p;
158
159 icmptype = i & 0xff;
160 p = icmp6type2name[icmptype];
161 if (!p) /* don't print un-named types here */
162 continue;
163 snprintf(name, sizeof(name), "Icmp6%s%s",
164 i & 0x100 ? "Out" : "In", p);
165 seq_printf(seq, "%-32s\t%lu\n", name,
166 atomic_long_read(smib + i));
167 }
168
169 /* print by number (nonzero only) - ICMPMsgStat format */
170 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
171 unsigned long val;
172
173 val = atomic_long_read(smib + i);
174 if (!val)
175 continue;
176 snprintf(name, sizeof(name), "Icmp6%sType%u",
177 i & 0x100 ? "Out" : "In", i & 0xff);
178 seq_printf(seq, "%-32s\t%lu\n", name, val);
179 }
180}
181
182/* can be called either with percpu mib (pcpumib != NULL),
183 * or shared one (smib != NULL)
184 */
185static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib,
186 atomic_long_t *smib,
187 const struct snmp_mib *itemlist)
188{
189 int i;
190 unsigned long val;
191
192 for (i = 0; itemlist[i].name; i++) {
193 val = pcpumib ?
194 snmp_fold_field(pcpumib, itemlist[i].entry) :
195 atomic_long_read(smib + itemlist[i].entry);
196 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
197 }
198}
199
200static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
201 const struct snmp_mib *itemlist, size_t syncpoff)
202{
203 int i;
204
205 for (i = 0; itemlist[i].name; i++)
206 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
207 snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
208}
209
210static int snmp6_seq_show(struct seq_file *seq, void *v)
211{
212 struct net *net = (struct net *)seq->private;
213
214 snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
215 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
216 snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
217 NULL, snmp6_icmp6_list);
218 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
219 snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
220 NULL, snmp6_udp6_list);
221 snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
222 NULL, snmp6_udplite6_list);
223 return 0;
224}
225
226static int snmp6_seq_open(struct inode *inode, struct file *file)
227{
228 return single_open_net(inode, file, snmp6_seq_show);
229}
230
231static const struct file_operations snmp6_seq_fops = {
232 .owner = THIS_MODULE,
233 .open = snmp6_seq_open,
234 .read = seq_read,
235 .llseek = seq_lseek,
236 .release = single_release_net,
237};
238
239static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
240{
241 struct inet6_dev *idev = (struct inet6_dev *)seq->private;
242
243 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
244 snmp6_seq_show_item64(seq, (void __percpu **)idev->stats.ipv6,
245 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
246 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
247 snmp6_icmp6_list);
248 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
249 return 0;
250}
251
252static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
253{
254 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode));
255}
256
257static const struct file_operations snmp6_dev_seq_fops = {
258 .owner = THIS_MODULE,
259 .open = snmp6_dev_seq_open,
260 .read = seq_read,
261 .llseek = seq_lseek,
262 .release = single_release,
263};
264
265int snmp6_register_dev(struct inet6_dev *idev)
266{
267 struct proc_dir_entry *p;
268 struct net *net;
269
270 if (!idev || !idev->dev)
271 return -EINVAL;
272
273 net = dev_net(idev->dev);
274 if (!net->mib.proc_net_devsnmp6)
275 return -ENOENT;
276
277 p = proc_create_data(idev->dev->name, S_IRUGO,
278 net->mib.proc_net_devsnmp6,
279 &snmp6_dev_seq_fops, idev);
280 if (!p)
281 return -ENOMEM;
282
283 idev->stats.proc_dir_entry = p;
284 return 0;
285}
286
287int snmp6_unregister_dev(struct inet6_dev *idev)
288{
289 struct net *net = dev_net(idev->dev);
290 if (!net->mib.proc_net_devsnmp6)
291 return -ENOENT;
292 if (!idev->stats.proc_dir_entry)
293 return -EINVAL;
294 proc_remove(idev->stats.proc_dir_entry);
295 idev->stats.proc_dir_entry = NULL;
296 return 0;
297}
298
299static int __net_init ipv6_proc_init_net(struct net *net)
300{
301 if (!proc_create("sockstat6", S_IRUGO, net->proc_net,
302 &sockstat6_seq_fops))
303 return -ENOMEM;
304
305 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops))
306 goto proc_snmp6_fail;
307
308 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
309 if (!net->mib.proc_net_devsnmp6)
310 goto proc_dev_snmp6_fail;
311 return 0;
312
313proc_dev_snmp6_fail:
314 remove_proc_entry("snmp6", net->proc_net);
315proc_snmp6_fail:
316 remove_proc_entry("sockstat6", net->proc_net);
317 return -ENOMEM;
318}
319
320static void __net_exit ipv6_proc_exit_net(struct net *net)
321{
322 remove_proc_entry("sockstat6", net->proc_net);
323 remove_proc_entry("dev_snmp6", net->proc_net);
324 remove_proc_entry("snmp6", net->proc_net);
325}
326
327static struct pernet_operations ipv6_proc_ops = {
328 .init = ipv6_proc_init_net,
329 .exit = ipv6_proc_exit_net,
330};
331
332int __init ipv6_misc_proc_init(void)
333{
334 return register_pernet_subsys(&ipv6_proc_ops);
335}
336
337void ipv6_misc_proc_exit(void)
338{
339 unregister_pernet_subsys(&ipv6_proc_ops);
340}
341