Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / net / ipv6 / proc.c
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 (i = 0; i < NR_CPUS; i++) {
144                 if (!cpu_possible(i))
145                         continue;
146                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
147                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
148         }
149         return res;
150 }
151
152 static inline void
153 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
154 {
155         int i;
156         for (i=0; itemlist[i].name; i++)
157                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 
158                                 fold_field(mib, itemlist[i].entry));
159 }
160
161 static int snmp6_seq_show(struct seq_file *seq, void *v)
162 {
163         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
164
165         if (idev) {
166                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
167                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
168         } else {
169                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
170                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
171                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
172         }
173         return 0;
174 }
175
176 static int sockstat6_seq_open(struct inode *inode, struct file *file)
177 {
178         return single_open(file, sockstat6_seq_show, NULL);
179 }
180
181 static struct file_operations sockstat6_seq_fops = {
182         .owner   = THIS_MODULE,
183         .open    = sockstat6_seq_open,
184         .read    = seq_read,
185         .llseek  = seq_lseek,
186         .release = single_release,
187 };
188
189 static int snmp6_seq_open(struct inode *inode, struct file *file)
190 {
191         return single_open(file, snmp6_seq_show, PDE(inode)->data);
192 }
193
194 static struct file_operations snmp6_seq_fops = {
195         .owner   = THIS_MODULE,
196         .open    = snmp6_seq_open,
197         .read    = seq_read,
198         .llseek  = seq_lseek,
199         .release = single_release,
200 };
201
202 int snmp6_register_dev(struct inet6_dev *idev)
203 {
204         struct proc_dir_entry *p;
205
206         if (!idev || !idev->dev)
207                 return -EINVAL;
208
209         if (!proc_net_devsnmp6)
210                 return -ENOENT;
211
212         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
213         if (!p)
214                 return -ENOMEM;
215
216         p->data = idev;
217         p->proc_fops = &snmp6_seq_fops;
218
219         idev->stats.proc_dir_entry = p;
220         return 0;
221 }
222
223 int snmp6_unregister_dev(struct inet6_dev *idev)
224 {
225         if (!proc_net_devsnmp6)
226                 return -ENOENT;
227         if (!idev || !idev->stats.proc_dir_entry)
228                 return -EINVAL;
229         remove_proc_entry(idev->stats.proc_dir_entry->name,
230                           proc_net_devsnmp6);
231         return 0;
232 }
233
234 int __init ipv6_misc_proc_init(void)
235 {
236         int rc = 0;
237
238         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
239                 goto proc_snmp6_fail;
240
241         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
242         if (!proc_net_devsnmp6)
243                 goto proc_dev_snmp6_fail;
244
245         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
246                 goto proc_sockstat6_fail;
247 out:
248         return rc;
249
250 proc_sockstat6_fail:
251         proc_net_remove("dev_snmp6");
252 proc_dev_snmp6_fail:
253         proc_net_remove("snmp6");
254 proc_snmp6_fail:
255         rc = -ENOMEM;
256         goto out;
257 }
258
259 void ipv6_misc_proc_exit(void)
260 {
261         proc_net_remove("sockstat6");
262         proc_net_remove("dev_snmp6");
263         proc_net_remove("snmp6");
264 }
265
266 #else   /* CONFIG_PROC_FS */
267
268
269 int snmp6_register_dev(struct inet6_dev *idev)
270 {
271         return 0;
272 }
273
274 int snmp6_unregister_dev(struct inet6_dev *idev)
275 {
276         return 0;
277 }
278 #endif  /* CONFIG_PROC_FS */
279
280 int snmp6_alloc_dev(struct inet6_dev *idev)
281 {
282         int err = -ENOMEM;
283
284         if (!idev || !idev->dev)
285                 return -EINVAL;
286
287         if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
288                            __alignof__(struct icmpv6_mib)) < 0)
289                 goto err_icmp;
290
291         return 0;
292
293 err_icmp:
294         return err;
295 }
296
297 int snmp6_free_dev(struct inet6_dev *idev)
298 {
299         snmp6_mib_free((void **)idev->stats.icmpv6);
300         return 0;
301 }
302
303