xref: /openbmc/linux/net/ipv6/proc.c (revision 22246614)
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  * Version:	$Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
11  *
12  * Authors:	David S. Miller (davem@caip.rutgers.edu)
13  * 		YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
14  *
15  *		This program is free software; you can redistribute it and/or
16  *		modify it under the terms of the GNU General Public License
17  *		as published by the Free Software Foundation; either version
18  *		2 of the License, or (at your option) any later version.
19  */
20 #include <linux/socket.h>
21 #include <linux/net.h>
22 #include <linux/ipv6.h>
23 #include <linux/proc_fs.h>
24 #include <linux/seq_file.h>
25 #include <linux/stddef.h>
26 #include <net/net_namespace.h>
27 #include <net/ip.h>
28 #include <net/sock.h>
29 #include <net/tcp.h>
30 #include <net/udp.h>
31 #include <net/transp_v6.h>
32 #include <net/ipv6.h>
33 
34 static struct proc_dir_entry *proc_net_devsnmp6;
35 
36 static int sockstat6_seq_show(struct seq_file *seq, void *v)
37 {
38 	struct net *net = seq->private;
39 
40 	seq_printf(seq, "TCP6: inuse %d\n",
41 		       sock_prot_inuse_get(net, &tcpv6_prot));
42 	seq_printf(seq, "UDP6: inuse %d\n",
43 		       sock_prot_inuse_get(net, &udpv6_prot));
44 	seq_printf(seq, "UDPLITE6: inuse %d\n",
45 			sock_prot_inuse_get(net, &udplitev6_prot));
46 	seq_printf(seq, "RAW6: inuse %d\n",
47 		       sock_prot_inuse_get(net, &rawv6_prot));
48 	seq_printf(seq, "FRAG6: inuse %d memory %d\n",
49 		       ip6_frag_nqueues(net), ip6_frag_mem(net));
50 	return 0;
51 }
52 
53 static struct snmp_mib snmp6_ipstats_list[] = {
54 /* ipv6 mib according to RFC 2465 */
55 	SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
56 	SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
57 	SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
58 	SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
59 	SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
60 	SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
61 	SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
62 	SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
63 	SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
64 	SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
65 	SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
66 	SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
67 	SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
68 	SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
69 	SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
70 	SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
71 	SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
72 	SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
73 	SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
74 	SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
75 	SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
76 	SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
77 	SNMP_MIB_SENTINEL
78 };
79 
80 static struct snmp_mib snmp6_icmp6_list[] = {
81 /* icmpv6 mib according to RFC 2466 */
82 	SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
83 	SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
84 	SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
85 	SNMP_MIB_SENTINEL
86 };
87 
88 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
89 static char *icmp6type2name[256] = {
90 	[ICMPV6_DEST_UNREACH] = "DestUnreachs",
91 	[ICMPV6_PKT_TOOBIG] = "PktTooBigs",
92 	[ICMPV6_TIME_EXCEED] = "TimeExcds",
93 	[ICMPV6_PARAMPROB] = "ParmProblems",
94 	[ICMPV6_ECHO_REQUEST] = "Echos",
95 	[ICMPV6_ECHO_REPLY] = "EchoReplies",
96 	[ICMPV6_MGM_QUERY] = "GroupMembQueries",
97 	[ICMPV6_MGM_REPORT] = "GroupMembResponses",
98 	[ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
99 	[ICMPV6_MLD2_REPORT] = "MLDv2Reports",
100 	[NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
101 	[NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
102 	[NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
103 	[NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
104 	[NDISC_REDIRECT] = "Redirects",
105 };
106 
107 
108 static struct snmp_mib snmp6_udp6_list[] = {
109 	SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
110 	SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
111 	SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
112 	SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
113 	SNMP_MIB_SENTINEL
114 };
115 
116 static struct snmp_mib snmp6_udplite6_list[] = {
117 	SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
118 	SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
119 	SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
120 	SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
121 	SNMP_MIB_SENTINEL
122 };
123 
124 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
125 {
126 	static char name[32];
127 	int i;
128 
129 	/* print by name -- deprecated items */
130 	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
131 		int icmptype;
132 		char *p;
133 
134 		icmptype = i & 0xff;
135 		p = icmp6type2name[icmptype];
136 		if (!p)	/* don't print un-named types here */
137 			continue;
138 		(void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
139 			i & 0x100 ? "Out" : "In", p);
140 		seq_printf(seq, "%-32s\t%lu\n", name,
141 			snmp_fold_field(mib, i));
142 	}
143 
144 	/* print by number (nonzero only) - ICMPMsgStat format */
145 	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
146 		unsigned long val;
147 
148 		val = snmp_fold_field(mib, i);
149 		if (!val)
150 			continue;
151 		(void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
152 			i & 0x100 ?  "Out" : "In", i & 0xff);
153 		seq_printf(seq, "%-32s\t%lu\n", name, val);
154 	}
155 	return;
156 }
157 
158 static inline void
159 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
160 {
161 	int i;
162 	for (i=0; itemlist[i].name; i++)
163 		seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
164 			   snmp_fold_field(mib, itemlist[i].entry));
165 }
166 
167 static int snmp6_seq_show(struct seq_file *seq, void *v)
168 {
169 	struct inet6_dev *idev = (struct inet6_dev *)seq->private;
170 
171 	if (idev) {
172 		seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
173 		snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
174 		snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
175 		snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
176 	} else {
177 		snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
178 		snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
179 		snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
180 		snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
181 		snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
182 	}
183 	return 0;
184 }
185 
186 static int sockstat6_seq_open(struct inode *inode, struct file *file)
187 {
188 	int err;
189 	struct net *net;
190 
191 	err = -ENXIO;
192 	net = get_proc_net(inode);
193 	if (net == NULL)
194 		goto err_net;
195 
196 	err = single_open(file, sockstat6_seq_show, net);
197 	if (err < 0)
198 		goto err_open;
199 
200 	return 0;
201 
202 err_open:
203 	put_net(net);
204 err_net:
205 	return err;
206 }
207 
208 static int sockstat6_seq_release(struct inode *inode, struct file *file)
209 {
210 	struct net *net = ((struct seq_file *)file->private_data)->private;
211 
212 	put_net(net);
213 	return single_release(inode, file);
214 }
215 
216 static const struct file_operations sockstat6_seq_fops = {
217 	.owner	 = THIS_MODULE,
218 	.open	 = sockstat6_seq_open,
219 	.read	 = seq_read,
220 	.llseek	 = seq_lseek,
221 	.release = sockstat6_seq_release,
222 };
223 
224 static int snmp6_seq_open(struct inode *inode, struct file *file)
225 {
226 	return single_open(file, snmp6_seq_show, PDE(inode)->data);
227 }
228 
229 static const struct file_operations snmp6_seq_fops = {
230 	.owner	 = THIS_MODULE,
231 	.open	 = snmp6_seq_open,
232 	.read	 = seq_read,
233 	.llseek	 = seq_lseek,
234 	.release = single_release,
235 };
236 
237 int snmp6_register_dev(struct inet6_dev *idev)
238 {
239 	struct proc_dir_entry *p;
240 
241 	if (!idev || !idev->dev)
242 		return -EINVAL;
243 
244 	if (dev_net(idev->dev) != &init_net)
245 		return 0;
246 
247 	if (!proc_net_devsnmp6)
248 		return -ENOENT;
249 
250 	p = proc_create_data(idev->dev->name, S_IRUGO,
251 			     proc_net_devsnmp6, &snmp6_seq_fops, idev);
252 	if (!p)
253 		return -ENOMEM;
254 
255 	idev->stats.proc_dir_entry = p;
256 	return 0;
257 }
258 
259 int snmp6_unregister_dev(struct inet6_dev *idev)
260 {
261 	if (!proc_net_devsnmp6)
262 		return -ENOENT;
263 	if (!idev || !idev->stats.proc_dir_entry)
264 		return -EINVAL;
265 	remove_proc_entry(idev->stats.proc_dir_entry->name,
266 			  proc_net_devsnmp6);
267 	idev->stats.proc_dir_entry = NULL;
268 	return 0;
269 }
270 
271 static int ipv6_proc_init_net(struct net *net)
272 {
273 	if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
274 			&sockstat6_seq_fops))
275 		return -ENOMEM;
276 	return 0;
277 }
278 
279 static void ipv6_proc_exit_net(struct net *net)
280 {
281 	proc_net_remove(net, "sockstat6");
282 }
283 
284 static struct pernet_operations ipv6_proc_ops = {
285 	.init = ipv6_proc_init_net,
286 	.exit = ipv6_proc_exit_net,
287 };
288 
289 int __init ipv6_misc_proc_init(void)
290 {
291 	int rc = 0;
292 
293 	if (register_pernet_subsys(&ipv6_proc_ops))
294 		goto proc_net_fail;
295 
296 	if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
297 		goto proc_snmp6_fail;
298 
299 	proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
300 	if (!proc_net_devsnmp6)
301 		goto proc_dev_snmp6_fail;
302 out:
303 	return rc;
304 
305 proc_dev_snmp6_fail:
306 	proc_net_remove(&init_net, "snmp6");
307 proc_snmp6_fail:
308 	unregister_pernet_subsys(&ipv6_proc_ops);
309 proc_net_fail:
310 	rc = -ENOMEM;
311 	goto out;
312 }
313 
314 void ipv6_misc_proc_exit(void)
315 {
316 	proc_net_remove(&init_net, "sockstat6");
317 	proc_net_remove(&init_net, "dev_snmp6");
318 	proc_net_remove(&init_net, "snmp6");
319 	unregister_pernet_subsys(&ipv6_proc_ops);
320 }
321 
322