Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-drm-fsl-dcu.git] / 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/sched.h>
21 #include <linux/socket.h>
22 #include <linux/net.h>
23 #include <linux/ipv6.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
26 #include <linux/stddef.h>
27 #include <net/sock.h>
28 #include <net/tcp.h>
29 #include <net/transp_v6.h>
30 #include <net/ipv6.h>
31
32 #ifdef CONFIG_PROC_FS
33 static struct proc_dir_entry *proc_net_devsnmp6;
34
35 static int fold_prot_inuse(struct proto *proto)
36 {
37         int res = 0;
38         int cpu;
39
40         for_each_possible_cpu(cpu)
41                 res += proto->stats[cpu].inuse;
42
43         return res;
44 }
45
46 static int sockstat6_seq_show(struct seq_file *seq, void *v)
47 {
48         seq_printf(seq, "TCP6: inuse %d\n",
49                        fold_prot_inuse(&tcpv6_prot));
50         seq_printf(seq, "UDP6: inuse %d\n",
51                        fold_prot_inuse(&udpv6_prot));
52         seq_printf(seq, "UDPLITE6: inuse %d\n",
53                         fold_prot_inuse(&udplitev6_prot));
54         seq_printf(seq, "RAW6: inuse %d\n",
55                        fold_prot_inuse(&rawv6_prot));
56         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
57                        ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
58         return 0;
59 }
60
61 static struct snmp_mib snmp6_ipstats_list[] = {
62 /* ipv6 mib according to RFC 2465 */
63         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
64         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
65         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
66         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
67         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
68         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
69         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
70         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
71         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
72         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
73         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
74         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
75         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
76         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
77         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
78         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
79         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
80         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
81         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
82         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
83         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
84         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
85         SNMP_MIB_SENTINEL
86 };
87
88 static struct snmp_mib snmp6_icmp6_list[] = {
89 /* icmpv6 mib according to RFC 2466
90
91    Exceptions:  {In|Out}AdminProhibs are removed, because I see
92                 no good reasons to account them separately
93                 of another dest.unreachs.
94                 OutErrs is zero identically.
95                 OutEchos too.
96                 OutRouterAdvertisements too.
97                 OutGroupMembQueries too.
98  */
99         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
100         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
101         SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
102         SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
103         SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
104         SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
105         SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
106         SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
107         SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
108         SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
109         SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
110         SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
111         SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
112         SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
113         SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
114         SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
115         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
116         SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
117         SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
118         SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
119         SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
120         SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
121         SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
122         SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
123         SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
124         SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
125         SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
126         SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
127         SNMP_MIB_SENTINEL
128 };
129
130 static struct snmp_mib snmp6_udp6_list[] = {
131         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
132         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
133         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
134         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
135         SNMP_MIB_SENTINEL
136 };
137
138 static 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_SENTINEL
144 };
145
146 static unsigned long
147 fold_field(void *mib[], int offt)
148 {
149         unsigned long res = 0;
150         int i;
151
152         for_each_possible_cpu(i) {
153                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
154                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
155         }
156         return res;
157 }
158
159 static inline void
160 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
161 {
162         int i;
163         for (i=0; itemlist[i].name; i++)
164                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
165                                 fold_field(mib, itemlist[i].entry));
166 }
167
168 static int snmp6_seq_show(struct seq_file *seq, void *v)
169 {
170         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
171
172         if (idev) {
173                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
174                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
175                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
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_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
180                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
181         }
182         return 0;
183 }
184
185 static int sockstat6_seq_open(struct inode *inode, struct file *file)
186 {
187         return single_open(file, sockstat6_seq_show, NULL);
188 }
189
190 static struct file_operations sockstat6_seq_fops = {
191         .owner   = THIS_MODULE,
192         .open    = sockstat6_seq_open,
193         .read    = seq_read,
194         .llseek  = seq_lseek,
195         .release = single_release,
196 };
197
198 static int snmp6_seq_open(struct inode *inode, struct file *file)
199 {
200         return single_open(file, snmp6_seq_show, PDE(inode)->data);
201 }
202
203 static struct file_operations snmp6_seq_fops = {
204         .owner   = THIS_MODULE,
205         .open    = snmp6_seq_open,
206         .read    = seq_read,
207         .llseek  = seq_lseek,
208         .release = single_release,
209 };
210
211 int snmp6_register_dev(struct inet6_dev *idev)
212 {
213         struct proc_dir_entry *p;
214
215         if (!idev || !idev->dev)
216                 return -EINVAL;
217
218         if (!proc_net_devsnmp6)
219                 return -ENOENT;
220
221         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
222         if (!p)
223                 return -ENOMEM;
224
225         p->data = idev;
226         p->proc_fops = &snmp6_seq_fops;
227
228         idev->stats.proc_dir_entry = p;
229         return 0;
230 }
231
232 int snmp6_unregister_dev(struct inet6_dev *idev)
233 {
234         if (!proc_net_devsnmp6)
235                 return -ENOENT;
236         if (!idev || !idev->stats.proc_dir_entry)
237                 return -EINVAL;
238         remove_proc_entry(idev->stats.proc_dir_entry->name,
239                           proc_net_devsnmp6);
240         return 0;
241 }
242
243 int __init ipv6_misc_proc_init(void)
244 {
245         int rc = 0;
246
247         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
248                 goto proc_snmp6_fail;
249
250         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
251         if (!proc_net_devsnmp6)
252                 goto proc_dev_snmp6_fail;
253
254         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
255                 goto proc_sockstat6_fail;
256 out:
257         return rc;
258
259 proc_sockstat6_fail:
260         proc_net_remove("dev_snmp6");
261 proc_dev_snmp6_fail:
262         proc_net_remove("snmp6");
263 proc_snmp6_fail:
264         rc = -ENOMEM;
265         goto out;
266 }
267
268 void ipv6_misc_proc_exit(void)
269 {
270         proc_net_remove("sockstat6");
271         proc_net_remove("dev_snmp6");
272         proc_net_remove("snmp6");
273 }
274
275 #else   /* CONFIG_PROC_FS */
276
277
278 int snmp6_register_dev(struct inet6_dev *idev)
279 {
280         return 0;
281 }
282
283 int snmp6_unregister_dev(struct inet6_dev *idev)
284 {
285         return 0;
286 }
287 #endif  /* CONFIG_PROC_FS */
288
289 int snmp6_alloc_dev(struct inet6_dev *idev)
290 {
291         int err = -ENOMEM;
292
293         if (!idev || !idev->dev)
294                 return -EINVAL;
295
296         if (snmp6_mib_init((void **)idev->stats.ipv6, sizeof(struct ipstats_mib),
297                            __alignof__(struct ipstats_mib)) < 0)
298                 goto err_ip;
299         if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
300                            __alignof__(struct icmpv6_mib)) < 0)
301                 goto err_icmp;
302
303         return 0;
304
305 err_icmp:
306         snmp6_mib_free((void **)idev->stats.ipv6);
307 err_ip:
308         return err;
309 }
310
311 int snmp6_free_dev(struct inet6_dev *idev)
312 {
313         snmp6_mib_free((void **)idev->stats.icmpv6);
314         snmp6_mib_free((void **)idev->stats.ipv6);
315         return 0;
316 }
317
318