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TOMOYO Linux Cross Reference
Linux/net/ipv6/proc.c

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  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 
 33 static int sockstat6_seq_show(struct seq_file *seq, void *v)
 34 {
 35         struct net *net = seq->private;
 36 
 37         seq_printf(seq, "TCP6: inuse %d\n",
 38                        sock_prot_inuse_get(net, &tcpv6_prot));
 39         seq_printf(seq, "UDP6: inuse %d\n",
 40                        sock_prot_inuse_get(net, &udpv6_prot));
 41         seq_printf(seq, "UDPLITE6: inuse %d\n",
 42                         sock_prot_inuse_get(net, &udplitev6_prot));
 43         seq_printf(seq, "RAW6: inuse %d\n",
 44                        sock_prot_inuse_get(net, &rawv6_prot));
 45         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
 46                        ip6_frag_nqueues(net), ip6_frag_mem(net));
 47         return 0;
 48 }
 49 
 50 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 51 {
 52         return single_open_net(inode, file, sockstat6_seq_show);
 53 }
 54 
 55 static 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 
 63 static 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 
101 static 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 */
112 static 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 
131 static 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 
142 static 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 
153 static 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  */
189 static 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 
204 static 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 
214 static 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 
230 static int snmp6_seq_open(struct inode *inode, struct file *file)
231 {
232         return single_open_net(inode, file, snmp6_seq_show);
233 }
234 
235 static 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 
243 static 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 
256 static 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 
261 static 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 
269 int 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 
291 int 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 
303 static 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 
317 proc_dev_snmp6_fail:
318         remove_proc_entry("snmp6", net->proc_net);
319 proc_snmp6_fail:
320         remove_proc_entry("sockstat6", net->proc_net);
321         return -ENOMEM;
322 }
323 
324 static 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 
331 static struct pernet_operations ipv6_proc_ops = {
332         .init = ipv6_proc_init_net,
333         .exit = ipv6_proc_exit_net,
334 };
335 
336 int __init ipv6_misc_proc_init(void)
337 {
338         return register_pernet_subsys(&ipv6_proc_ops);
339 }
340 
341 void ipv6_misc_proc_exit(void)
342 {
343         unregister_pernet_subsys(&ipv6_proc_ops);
344 }
345 
346 

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