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	unsigned int frag_mem = ip6_frag_mem(net);
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 %u\n", !!frag_mem, frag_mem);
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_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
95	SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
96	SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
97	SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
98	SNMP_MIB_SENTINEL
99};
100
101static const struct snmp_mib snmp6_icmp6_list[] = {
102/* icmpv6 mib according to RFC 2466 */
103	SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
104	SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
105	SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
106	SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
107	SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
108	SNMP_MIB_SENTINEL
109};
110
111/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
112static const char *const icmp6type2name[256] = {
113	[ICMPV6_DEST_UNREACH] = "DestUnreachs",
114	[ICMPV6_PKT_TOOBIG] = "PktTooBigs",
115	[ICMPV6_TIME_EXCEED] = "TimeExcds",
116	[ICMPV6_PARAMPROB] = "ParmProblems",
117	[ICMPV6_ECHO_REQUEST] = "Echos",
118	[ICMPV6_ECHO_REPLY] = "EchoReplies",
119	[ICMPV6_MGM_QUERY] = "GroupMembQueries",
120	[ICMPV6_MGM_REPORT] = "GroupMembResponses",
121	[ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
122	[ICMPV6_MLD2_REPORT] = "MLDv2Reports",
123	[NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
124	[NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
125	[NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
126	[NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
127	[NDISC_REDIRECT] = "Redirects",
128};
129
130
131static const struct snmp_mib snmp6_udp6_list[] = {
132	SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
133	SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
134	SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
135	SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
136	SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
137	SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
138	SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
139	SNMP_MIB_SENTINEL
140};
141
142static const struct snmp_mib snmp6_udplite6_list[] = {
143	SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
144	SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
145	SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
146	SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
147	SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
148	SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
149	SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
150	SNMP_MIB_SENTINEL
151};
152
153static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
154{
155	char name[32];
156	int i;
157
158	/* print by name -- deprecated items */
159	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
160		int icmptype;
161		const char *p;
162
163		icmptype = i & 0xff;
164		p = icmp6type2name[icmptype];
165		if (!p)	/* don't print un-named types here */
166			continue;
167		snprintf(name, sizeof(name), "Icmp6%s%s",
168			i & 0x100 ? "Out" : "In", p);
169		seq_printf(seq, "%-32s\t%lu\n", name,
170			   atomic_long_read(smib + i));
171	}
172
173	/* print by number (nonzero only) - ICMPMsgStat format */
174	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
175		unsigned long val;
176
177		val = atomic_long_read(smib + i);
178		if (!val)
179			continue;
180		snprintf(name, sizeof(name), "Icmp6%sType%u",
181			i & 0x100 ?  "Out" : "In", i & 0xff);
182		seq_printf(seq, "%-32s\t%lu\n", name, val);
183	}
184}
185
186/* can be called either with percpu mib (pcpumib != NULL),
187 * or shared one (smib != NULL)
188 */
189static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
190				atomic_long_t *smib,
191				const struct snmp_mib *itemlist)
192{
193	int i;
194	unsigned long val;
195
196	for (i = 0; itemlist[i].name; i++) {
197		val = pcpumib ?
198			snmp_fold_field(pcpumib, itemlist[i].entry) :
199			atomic_long_read(smib + itemlist[i].entry);
200		seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
201	}
202}
203
204static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
205				  const struct snmp_mib *itemlist, size_t syncpoff)
206{
207	int i;
208
209	for (i = 0; itemlist[i].name; i++)
210		seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
211			   snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
212}
213
214static int snmp6_seq_show(struct seq_file *seq, void *v)
215{
216	struct net *net = (struct net *)seq->private;
217
218	snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,
219			    snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
220	snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
221			    NULL, snmp6_icmp6_list);
222	snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
223	snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
224			    NULL, snmp6_udp6_list);
225	snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
226			    NULL, snmp6_udplite6_list);
227	return 0;
228}
229
230static int snmp6_seq_open(struct inode *inode, struct file *file)
231{
232	return single_open_net(inode, file, snmp6_seq_show);
233}
234
235static const struct file_operations snmp6_seq_fops = {
236	.owner	 = THIS_MODULE,
237	.open	 = snmp6_seq_open,
238	.read	 = seq_read,
239	.llseek	 = seq_lseek,
240	.release = single_release_net,
241};
242
243static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
244{
245	struct inet6_dev *idev = (struct inet6_dev *)seq->private;
246
247	seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
248	snmp6_seq_show_item64(seq, idev->stats.ipv6,
249			    snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
250	snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
251			    snmp6_icmp6_list);
252	snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
253	return 0;
254}
255
256static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
257{
258	return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode));
259}
260
261static const struct file_operations snmp6_dev_seq_fops = {
262	.owner	 = THIS_MODULE,
263	.open	 = snmp6_dev_seq_open,
264	.read	 = seq_read,
265	.llseek	 = seq_lseek,
266	.release = single_release,
267};
268
269int snmp6_register_dev(struct inet6_dev *idev)
270{
271	struct proc_dir_entry *p;
272	struct net *net;
273
274	if (!idev || !idev->dev)
275		return -EINVAL;
276
277	net = dev_net(idev->dev);
278	if (!net->mib.proc_net_devsnmp6)
279		return -ENOENT;
280
281	p = proc_create_data(idev->dev->name, S_IRUGO,
282			     net->mib.proc_net_devsnmp6,
283			     &snmp6_dev_seq_fops, idev);
284	if (!p)
285		return -ENOMEM;
286
287	idev->stats.proc_dir_entry = p;
288	return 0;
289}
290
291int snmp6_unregister_dev(struct inet6_dev *idev)
292{
293	struct net *net = dev_net(idev->dev);
294	if (!net->mib.proc_net_devsnmp6)
295		return -ENOENT;
296	if (!idev->stats.proc_dir_entry)
297		return -EINVAL;
298	proc_remove(idev->stats.proc_dir_entry);
299	idev->stats.proc_dir_entry = NULL;
300	return 0;
301}
302
303static int __net_init ipv6_proc_init_net(struct net *net)
304{
305	if (!proc_create("sockstat6", S_IRUGO, net->proc_net,
306			 &sockstat6_seq_fops))
307		return -ENOMEM;
308
309	if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops))
310		goto proc_snmp6_fail;
311
312	net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
313	if (!net->mib.proc_net_devsnmp6)
314		goto proc_dev_snmp6_fail;
315	return 0;
316
317proc_dev_snmp6_fail:
318	remove_proc_entry("snmp6", net->proc_net);
319proc_snmp6_fail:
320	remove_proc_entry("sockstat6", net->proc_net);
321	return -ENOMEM;
322}
323
324static void __net_exit ipv6_proc_exit_net(struct net *net)
325{
326	remove_proc_entry("sockstat6", net->proc_net);
327	remove_proc_entry("dev_snmp6", net->proc_net);
328	remove_proc_entry("snmp6", net->proc_net);
329}
330
331static struct pernet_operations ipv6_proc_ops = {
332	.init = ipv6_proc_init_net,
333	.exit = ipv6_proc_exit_net,
334};
335
336int __init ipv6_misc_proc_init(void)
337{
338	return register_pernet_subsys(&ipv6_proc_ops);
339}
340
341void ipv6_misc_proc_exit(void)
342{
343	unregister_pernet_subsys(&ipv6_proc_ops);
344}
345
346