xref: /openbmc/linux/net/ipv6/proc.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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/config.h>
21 #include <linux/sched.h>
22 #include <linux/socket.h>
23 #include <linux/net.h>
24 #include <linux/ipv6.h>
25 #include <linux/proc_fs.h>
26 #include <linux/seq_file.h>
27 #include <linux/stddef.h>
28 #include <net/sock.h>
29 #include <net/tcp.h>
30 #include <net/transp_v6.h>
31 #include <net/ipv6.h>
32 
33 #ifdef CONFIG_PROC_FS
34 static struct proc_dir_entry *proc_net_devsnmp6;
35 
36 static int fold_prot_inuse(struct proto *proto)
37 {
38 	int res = 0;
39 	int cpu;
40 
41 	for (cpu=0; cpu<NR_CPUS; cpu++)
42 		res += proto->stats[cpu].inuse;
43 
44 	return res;
45 }
46 
47 static int sockstat6_seq_show(struct seq_file *seq, void *v)
48 {
49 	seq_printf(seq, "TCP6: inuse %d\n",
50 		       fold_prot_inuse(&tcpv6_prot));
51 	seq_printf(seq, "UDP6: inuse %d\n",
52 		       fold_prot_inuse(&udpv6_prot));
53 	seq_printf(seq, "RAW6: inuse %d\n",
54 		       fold_prot_inuse(&rawv6_prot));
55 	seq_printf(seq, "FRAG6: inuse %d memory %d\n",
56 		       ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
57 	return 0;
58 }
59 
60 static struct snmp_mib snmp6_ipstats_list[] = {
61 /* ipv6 mib according to RFC 2465 */
62 	SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
63 	SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
64 	SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
65 	SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
66 	SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
67 	SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
68 	SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
69 	SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
70 	SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
71 	SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
72 	SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
73 	SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
74 	SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
75 	SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
76 	SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
77 	SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
78 	SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
79 	SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
80 	SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
81 	SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
82 	SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
83 	SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
84 	SNMP_MIB_SENTINEL
85 };
86 
87 static struct snmp_mib snmp6_icmp6_list[] = {
88 /* icmpv6 mib according to RFC 2466
89 
90    Exceptions:  {In|Out}AdminProhibs are removed, because I see
91                 no good reasons to account them separately
92 		of another dest.unreachs.
93 		OutErrs is zero identically.
94 		OutEchos too.
95 		OutRouterAdvertisements too.
96 		OutGroupMembQueries too.
97  */
98 	SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
99 	SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
100 	SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
101 	SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
102 	SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
103 	SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
104 	SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
105 	SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
106 	SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
107 	SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
108 	SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
109 	SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
110 	SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
111 	SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
112 	SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
113 	SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
114 	SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
115 	SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
116 	SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
117 	SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
118 	SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
119 	SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
120 	SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
121 	SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
122 	SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
123 	SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
124 	SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
125 	SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
126 	SNMP_MIB_SENTINEL
127 };
128 
129 static struct snmp_mib snmp6_udp6_list[] = {
130 	SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
131 	SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
132 	SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
133 	SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
134 	SNMP_MIB_SENTINEL
135 };
136 
137 static unsigned long
138 fold_field(void *mib[], int offt)
139 {
140         unsigned long res = 0;
141         int i;
142 
143         for_each_cpu(i) {
144                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
145                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
146         }
147         return res;
148 }
149 
150 static inline void
151 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
152 {
153 	int i;
154 	for (i=0; itemlist[i].name; i++)
155 		seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
156 				fold_field(mib, itemlist[i].entry));
157 }
158 
159 static int snmp6_seq_show(struct seq_file *seq, void *v)
160 {
161 	struct inet6_dev *idev = (struct inet6_dev *)seq->private;
162 
163 	if (idev) {
164 		seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
165 		snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
166 	} else {
167 		snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
168 		snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
169 		snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
170 	}
171 	return 0;
172 }
173 
174 static int sockstat6_seq_open(struct inode *inode, struct file *file)
175 {
176 	return single_open(file, sockstat6_seq_show, NULL);
177 }
178 
179 static struct file_operations sockstat6_seq_fops = {
180 	.owner	 = THIS_MODULE,
181 	.open	 = sockstat6_seq_open,
182 	.read	 = seq_read,
183 	.llseek	 = seq_lseek,
184 	.release = single_release,
185 };
186 
187 static int snmp6_seq_open(struct inode *inode, struct file *file)
188 {
189 	return single_open(file, snmp6_seq_show, PDE(inode)->data);
190 }
191 
192 static struct file_operations snmp6_seq_fops = {
193 	.owner	 = THIS_MODULE,
194 	.open	 = snmp6_seq_open,
195 	.read	 = seq_read,
196 	.llseek	 = seq_lseek,
197 	.release = single_release,
198 };
199 
200 int snmp6_register_dev(struct inet6_dev *idev)
201 {
202 	struct proc_dir_entry *p;
203 
204 	if (!idev || !idev->dev)
205 		return -EINVAL;
206 
207 	if (!proc_net_devsnmp6)
208 		return -ENOENT;
209 
210 	p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
211 	if (!p)
212 		return -ENOMEM;
213 
214 	p->data = idev;
215 	p->proc_fops = &snmp6_seq_fops;
216 
217 	idev->stats.proc_dir_entry = p;
218 	return 0;
219 }
220 
221 int snmp6_unregister_dev(struct inet6_dev *idev)
222 {
223 	if (!proc_net_devsnmp6)
224 		return -ENOENT;
225 	if (!idev || !idev->stats.proc_dir_entry)
226 		return -EINVAL;
227 	remove_proc_entry(idev->stats.proc_dir_entry->name,
228 			  proc_net_devsnmp6);
229 	return 0;
230 }
231 
232 int __init ipv6_misc_proc_init(void)
233 {
234 	int rc = 0;
235 
236 	if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
237 		goto proc_snmp6_fail;
238 
239 	proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
240 	if (!proc_net_devsnmp6)
241 		goto proc_dev_snmp6_fail;
242 
243 	if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
244 		goto proc_sockstat6_fail;
245 out:
246 	return rc;
247 
248 proc_sockstat6_fail:
249 	proc_net_remove("dev_snmp6");
250 proc_dev_snmp6_fail:
251 	proc_net_remove("snmp6");
252 proc_snmp6_fail:
253 	rc = -ENOMEM;
254 	goto out;
255 }
256 
257 void ipv6_misc_proc_exit(void)
258 {
259 	proc_net_remove("sockstat6");
260 	proc_net_remove("dev_snmp6");
261 	proc_net_remove("snmp6");
262 }
263 
264 #else	/* CONFIG_PROC_FS */
265 
266 
267 int snmp6_register_dev(struct inet6_dev *idev)
268 {
269 	return 0;
270 }
271 
272 int snmp6_unregister_dev(struct inet6_dev *idev)
273 {
274 	return 0;
275 }
276 #endif	/* CONFIG_PROC_FS */
277 
278 int snmp6_alloc_dev(struct inet6_dev *idev)
279 {
280 	int err = -ENOMEM;
281 
282 	if (!idev || !idev->dev)
283 		return -EINVAL;
284 
285 	if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
286 			   __alignof__(struct icmpv6_mib)) < 0)
287 		goto err_icmp;
288 
289 	return 0;
290 
291 err_icmp:
292 	return err;
293 }
294 
295 int snmp6_free_dev(struct inet6_dev *idev)
296 {
297 	snmp6_mib_free((void **)idev->stats.icmpv6);
298 	return 0;
299 }
300 
301 
302