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1da177e4 LT |
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 | */ | |
1da177e4 LT |
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> | |
97fc8d0b | 26 | #include <asm/unaligned.h> |
1da177e4 LT |
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 | ||
6f912042 | 40 | for_each_possible_cpu(cpu) |
1da177e4 LT |
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)); | |
ba4e58ec | 52 | seq_printf(seq, "UDPLITE6: inuse %d\n", |
1ab1457c | 53 | fold_prot_inuse(&udplitev6_prot)); |
1da177e4 LT |
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 | |
1ab1457c | 92 | no good reasons to account them separately |
1da177e4 LT |
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 | ||
ba4e58ec GR |
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 | }; | |
1370b5a5 | 145 | #endif /* CONFIG_PROC_FS */ |
ba4e58ec | 146 | |
1da177e4 LT |
147 | static unsigned long |
148 | fold_field(void *mib[], int offt) | |
149 | { | |
1ab1457c YH |
150 | unsigned long res = 0; |
151 | int i; | |
152 | ||
153 | for_each_possible_cpu(i) { | |
154 | res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt); | |
155 | res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt); | |
156 | } | |
157 | return res; | |
1da177e4 LT |
158 | } |
159 | ||
1370b5a5 | 160 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
161 | static inline void |
162 | snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) | |
163 | { | |
164 | int i; | |
165 | for (i=0; itemlist[i].name; i++) | |
1ab1457c | 166 | seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, |
1da177e4 LT |
167 | fold_field(mib, itemlist[i].entry)); |
168 | } | |
169 | ||
170 | static int snmp6_seq_show(struct seq_file *seq, void *v) | |
171 | { | |
172 | struct inet6_dev *idev = (struct inet6_dev *)seq->private; | |
173 | ||
174 | if (idev) { | |
175 | seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); | |
a11d206d | 176 | snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list); |
1da177e4 LT |
177 | snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); |
178 | } else { | |
179 | snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); | |
180 | snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); | |
181 | snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); | |
ba4e58ec | 182 | snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list); |
1da177e4 LT |
183 | } |
184 | return 0; | |
185 | } | |
186 | ||
187 | static int sockstat6_seq_open(struct inode *inode, struct file *file) | |
188 | { | |
189 | return single_open(file, sockstat6_seq_show, NULL); | |
190 | } | |
191 | ||
9a32144e | 192 | static const struct file_operations sockstat6_seq_fops = { |
1da177e4 LT |
193 | .owner = THIS_MODULE, |
194 | .open = sockstat6_seq_open, | |
195 | .read = seq_read, | |
196 | .llseek = seq_lseek, | |
197 | .release = single_release, | |
198 | }; | |
199 | ||
200 | static int snmp6_seq_open(struct inode *inode, struct file *file) | |
201 | { | |
202 | return single_open(file, snmp6_seq_show, PDE(inode)->data); | |
203 | } | |
204 | ||
9a32144e | 205 | static const struct file_operations snmp6_seq_fops = { |
1da177e4 LT |
206 | .owner = THIS_MODULE, |
207 | .open = snmp6_seq_open, | |
208 | .read = seq_read, | |
209 | .llseek = seq_lseek, | |
210 | .release = single_release, | |
211 | }; | |
1370b5a5 | 212 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 213 | |
bf99f1bd | 214 | static inline void |
97fc8d0b | 215 | __snmp6_fill_stats(u64 *stats, void **mib, int items, int bytes) |
bf99f1bd YH |
216 | { |
217 | int i; | |
218 | int pad = bytes - sizeof(u64) * items; | |
219 | BUG_ON(pad < 0); | |
97fc8d0b YH |
220 | |
221 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
222 | put_unaligned(items, &stats[0]); | |
223 | for (i = 1; i < items; i++) | |
224 | put_unaligned(fold_field(mib, i), &stats[i]); | |
225 | ||
226 | memset(&stats[items], 0, pad); | |
bf99f1bd YH |
227 | } |
228 | ||
229 | void | |
97fc8d0b | 230 | snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, int bytes) |
bf99f1bd YH |
231 | { |
232 | switch(attrtype) { | |
233 | case IFLA_INET6_STATS: | |
234 | __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); | |
235 | break; | |
236 | case IFLA_INET6_ICMP6STATS: | |
237 | __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
1370b5a5 | 242 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
243 | int snmp6_register_dev(struct inet6_dev *idev) |
244 | { | |
245 | struct proc_dir_entry *p; | |
246 | ||
247 | if (!idev || !idev->dev) | |
248 | return -EINVAL; | |
249 | ||
250 | if (!proc_net_devsnmp6) | |
251 | return -ENOENT; | |
252 | ||
253 | p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); | |
254 | if (!p) | |
255 | return -ENOMEM; | |
256 | ||
257 | p->data = idev; | |
258 | p->proc_fops = &snmp6_seq_fops; | |
259 | ||
260 | idev->stats.proc_dir_entry = p; | |
261 | return 0; | |
262 | } | |
263 | ||
264 | int snmp6_unregister_dev(struct inet6_dev *idev) | |
265 | { | |
266 | if (!proc_net_devsnmp6) | |
267 | return -ENOENT; | |
268 | if (!idev || !idev->stats.proc_dir_entry) | |
269 | return -EINVAL; | |
270 | remove_proc_entry(idev->stats.proc_dir_entry->name, | |
271 | proc_net_devsnmp6); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | int __init ipv6_misc_proc_init(void) | |
276 | { | |
277 | int rc = 0; | |
278 | ||
279 | if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops)) | |
280 | goto proc_snmp6_fail; | |
281 | ||
282 | proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net); | |
283 | if (!proc_net_devsnmp6) | |
284 | goto proc_dev_snmp6_fail; | |
285 | ||
286 | if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops)) | |
287 | goto proc_sockstat6_fail; | |
288 | out: | |
289 | return rc; | |
290 | ||
291 | proc_sockstat6_fail: | |
292 | proc_net_remove("dev_snmp6"); | |
293 | proc_dev_snmp6_fail: | |
294 | proc_net_remove("snmp6"); | |
295 | proc_snmp6_fail: | |
296 | rc = -ENOMEM; | |
297 | goto out; | |
298 | } | |
299 | ||
300 | void ipv6_misc_proc_exit(void) | |
301 | { | |
302 | proc_net_remove("sockstat6"); | |
303 | proc_net_remove("dev_snmp6"); | |
304 | proc_net_remove("snmp6"); | |
305 | } | |
306 | ||
307 | #else /* CONFIG_PROC_FS */ | |
308 | ||
309 | ||
310 | int snmp6_register_dev(struct inet6_dev *idev) | |
311 | { | |
312 | return 0; | |
313 | } | |
314 | ||
315 | int snmp6_unregister_dev(struct inet6_dev *idev) | |
316 | { | |
317 | return 0; | |
318 | } | |
bf99f1bd | 319 | |
1da177e4 LT |
320 | #endif /* CONFIG_PROC_FS */ |
321 | ||
322 | int snmp6_alloc_dev(struct inet6_dev *idev) | |
323 | { | |
324 | int err = -ENOMEM; | |
325 | ||
326 | if (!idev || !idev->dev) | |
327 | return -EINVAL; | |
328 | ||
a11d206d YH |
329 | if (snmp6_mib_init((void **)idev->stats.ipv6, sizeof(struct ipstats_mib), |
330 | __alignof__(struct ipstats_mib)) < 0) | |
331 | goto err_ip; | |
1da177e4 LT |
332 | if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib), |
333 | __alignof__(struct icmpv6_mib)) < 0) | |
334 | goto err_icmp; | |
335 | ||
336 | return 0; | |
337 | ||
338 | err_icmp: | |
a11d206d YH |
339 | snmp6_mib_free((void **)idev->stats.ipv6); |
340 | err_ip: | |
1da177e4 LT |
341 | return err; |
342 | } | |
343 | ||
344 | int snmp6_free_dev(struct inet6_dev *idev) | |
345 | { | |
346 | snmp6_mib_free((void **)idev->stats.icmpv6); | |
a11d206d | 347 | snmp6_mib_free((void **)idev->stats.ipv6); |
1da177e4 LT |
348 | return 0; |
349 | } | |
350 | ||
49ed67a9 YH |
351 | int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) |
352 | { | |
353 | if (ptr == NULL) | |
354 | return -EINVAL; | |
355 | ||
356 | ptr[0] = __alloc_percpu(mibsize); | |
357 | if (!ptr[0]) | |
358 | goto err0; | |
359 | ||
360 | ptr[1] = __alloc_percpu(mibsize); | |
361 | if (!ptr[1]) | |
362 | goto err1; | |
363 | ||
364 | return 0; | |
365 | ||
366 | err1: | |
367 | free_percpu(ptr[0]); | |
368 | ptr[0] = NULL; | |
369 | err0: | |
370 | return -ENOMEM; | |
371 | } | |
372 | ||
373 | void snmp6_mib_free(void *ptr[2]) | |
374 | { | |
375 | if (ptr == NULL) | |
376 | return; | |
377 | free_percpu(ptr[0]); | |
378 | free_percpu(ptr[1]); | |
379 | ptr[0] = ptr[1] = NULL; | |
380 | } | |
1da177e4 | 381 |