blob: db00d27ffb168f87f5137cbc4fe2a9102d5561d1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Anycast support for IPv6
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003 * Linux INET6 implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * Authors:
6 * David L Stevens (dlstevens@us.ibm.com)
7 *
8 * based heavily on net/ipv6/mcast.c
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
Randy Dunlap4fc268d2006-01-11 12:17:47 -080016#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/module.h>
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/random.h>
21#include <linux/string.h>
22#include <linux/socket.h>
23#include <linux/sockios.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/net.h>
25#include <linux/in6.h>
26#include <linux/netdevice.h>
27#include <linux/if_arp.h>
28#include <linux/route.h>
29#include <linux/init.h>
30#include <linux/proc_fs.h>
31#include <linux/seq_file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090032#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020034#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <net/sock.h>
36#include <net/snmp.h>
37
38#include <net/ipv6.h>
39#include <net/protocol.h>
40#include <net/if_inet6.h>
41#include <net/ndisc.h>
42#include <net/addrconf.h>
43#include <net/ip6_route.h>
44
45#include <net/checksum.h>
46
Eric Dumazetb71d1d42011-04-22 04:53:02 +000047static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49/* Big ac list lock for all the sockets */
50static DEFINE_RWLOCK(ipv6_sk_ac_lock);
51
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53/*
54 * socket join an anycast group
55 */
56
Eric Dumazetb71d1d42011-04-22 04:53:02 +000057int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
59 struct ipv6_pinfo *np = inet6_sk(sk);
60 struct net_device *dev = NULL;
61 struct inet6_dev *idev;
62 struct ipv6_ac_socklist *pac;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -070063 struct net *net = sock_net(sk);
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -070064 int ishost = !net->ipv6.devconf_all->forwarding;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 int err = 0;
66
67 if (!capable(CAP_NET_ADMIN))
68 return -EPERM;
69 if (ipv6_addr_is_multicast(addr))
70 return -EINVAL;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -070071 if (ipv6_chk_addr(net, addr, NULL, 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 return -EINVAL;
73
74 pac = sock_kmalloc(sk, sizeof(struct ipv6_ac_socklist), GFP_KERNEL);
75 if (pac == NULL)
76 return -ENOMEM;
77 pac->acl_next = NULL;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +000078 pac->acl_addr = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Eric Dumazetbb69ae02010-06-07 11:42:13 +000080 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 if (ifindex == 0) {
82 struct rt6_info *rt;
83
Daniel Lezcano6ab57e72008-03-26 16:52:32 -070084 rt = rt6_lookup(net, addr, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 if (rt) {
David S. Millerd1918542011-12-28 20:19:20 -050086 dev = rt->dst.dev;
Changli Gaod8d1f302010-06-10 23:31:35 -070087 dst_release(&rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 } else if (ishost) {
89 err = -EADDRNOTAVAIL;
Eric Dumazetbb69ae02010-06-07 11:42:13 +000090 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 } else {
92 /* router, no matching interface: just pick one */
Eric Dumazetbb69ae02010-06-07 11:42:13 +000093 dev = dev_get_by_flags_rcu(net, IFF_UP,
94 IFF_UP | IFF_LOOPBACK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 }
96 } else
Eric Dumazetbb69ae02010-06-07 11:42:13 +000097 dev = dev_get_by_index_rcu(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99 if (dev == NULL) {
100 err = -ENODEV;
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000101 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 }
103
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000104 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 if (!idev) {
106 if (ifindex)
107 err = -ENODEV;
108 else
109 err = -EADDRNOTAVAIL;
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000110 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 }
112 /* reset ishost, now that we have a specific device */
113 ishost = !idev->cnf.forwarding;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115 pac->acl_ifindex = dev->ifindex;
116
117 /* XXX
118 * For hosts, allow link-local or matching prefix anycasts.
119 * This obviates the need for propagating anycast routes while
120 * still allowing some non-router anycast participation.
121 */
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -0400122 if (!ipv6_chk_prefix(addr, dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 if (ishost)
124 err = -EADDRNOTAVAIL;
125 if (err)
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000126 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 }
128
129 err = ipv6_dev_ac_inc(dev, addr);
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000130 if (!err) {
131 write_lock_bh(&ipv6_sk_ac_lock);
132 pac->acl_next = np->ipv6_ac_list;
133 np->ipv6_ac_list = pac;
134 write_unlock_bh(&ipv6_sk_ac_lock);
135 pac = NULL;
136 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000138error:
139 rcu_read_unlock();
140 if (pac)
141 sock_kfree_s(sk, pac, sizeof(*pac));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 return err;
143}
144
145/*
146 * socket leave an anycast group
147 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000148int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
150 struct ipv6_pinfo *np = inet6_sk(sk);
151 struct net_device *dev;
152 struct ipv6_ac_socklist *pac, *prev_pac;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700153 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 write_lock_bh(&ipv6_sk_ac_lock);
156 prev_pac = NULL;
157 for (pac = np->ipv6_ac_list; pac; pac = pac->acl_next) {
158 if ((ifindex == 0 || pac->acl_ifindex == ifindex) &&
159 ipv6_addr_equal(&pac->acl_addr, addr))
160 break;
161 prev_pac = pac;
162 }
163 if (!pac) {
164 write_unlock_bh(&ipv6_sk_ac_lock);
165 return -ENOENT;
166 }
167 if (prev_pac)
168 prev_pac->acl_next = pac->acl_next;
169 else
170 np->ipv6_ac_list = pac->acl_next;
171
172 write_unlock_bh(&ipv6_sk_ac_lock);
173
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000174 rcu_read_lock();
175 dev = dev_get_by_index_rcu(net, pac->acl_ifindex);
176 if (dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 ipv6_dev_ac_dec(dev, &pac->acl_addr);
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000178 rcu_read_unlock();
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 sock_kfree_s(sk, pac, sizeof(*pac));
181 return 0;
182}
183
184void ipv6_sock_ac_close(struct sock *sk)
185{
186 struct ipv6_pinfo *np = inet6_sk(sk);
187 struct net_device *dev = NULL;
188 struct ipv6_ac_socklist *pac;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700189 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 int prev_index;
191
192 write_lock_bh(&ipv6_sk_ac_lock);
193 pac = np->ipv6_ac_list;
194 np->ipv6_ac_list = NULL;
195 write_unlock_bh(&ipv6_sk_ac_lock);
196
197 prev_index = 0;
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000198 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 while (pac) {
200 struct ipv6_ac_socklist *next = pac->acl_next;
201
202 if (pac->acl_ifindex != prev_index) {
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000203 dev = dev_get_by_index_rcu(net, pac->acl_ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 prev_index = pac->acl_ifindex;
205 }
206 if (dev)
207 ipv6_dev_ac_dec(dev, &pac->acl_addr);
208 sock_kfree_s(sk, pac, sizeof(*pac));
209 pac = next;
210 }
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000211 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214static void aca_put(struct ifacaddr6 *ac)
215{
216 if (atomic_dec_and_test(&ac->aca_refcnt)) {
217 in6_dev_put(ac->aca_idev);
Changli Gaod8d1f302010-06-10 23:31:35 -0700218 dst_release(&ac->aca_rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 kfree(ac);
220 }
221}
222
223/*
224 * device anycast group inc (add if not found)
225 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000226int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
228 struct ifacaddr6 *aca;
229 struct inet6_dev *idev;
230 struct rt6_info *rt;
231 int err;
232
233 idev = in6_dev_get(dev);
234
235 if (idev == NULL)
236 return -EINVAL;
237
238 write_lock_bh(&idev->lock);
239 if (idev->dead) {
240 err = -ENODEV;
241 goto out;
242 }
243
244 for (aca = idev->ac_list; aca; aca = aca->aca_next) {
245 if (ipv6_addr_equal(&aca->aca_addr, addr)) {
246 aca->aca_users++;
247 err = 0;
248 goto out;
249 }
250 }
251
252 /*
253 * not found: create a new one.
254 */
255
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800256 aca = kzalloc(sizeof(struct ifacaddr6), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 if (aca == NULL) {
259 err = -ENOMEM;
260 goto out;
261 }
262
David S. Miller8f031512011-12-06 16:48:14 -0500263 rt = addrconf_dst_alloc(idev, addr, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 if (IS_ERR(rt)) {
265 kfree(aca);
266 err = PTR_ERR(rt);
267 goto out;
268 }
269
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000270 aca->aca_addr = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 aca->aca_idev = idev;
272 aca->aca_rt = rt;
273 aca->aca_users = 1;
274 /* aca_tstamp should be updated upon changes */
275 aca->aca_cstamp = aca->aca_tstamp = jiffies;
276 atomic_set(&aca->aca_refcnt, 2);
277 spin_lock_init(&aca->aca_lock);
278
279 aca->aca_next = idev->ac_list;
280 idev->ac_list = aca;
281 write_unlock_bh(&idev->lock);
282
Denis V. Lunev84f59372008-04-03 13:33:00 -0700283 ip6_ins_rt(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
285 addrconf_join_solict(dev, &aca->aca_addr);
286
287 aca_put(aca);
288 return 0;
289out:
290 write_unlock_bh(&idev->lock);
291 in6_dev_put(idev);
292 return err;
293}
294
295/*
296 * device anycast group decrement
297 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000298int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
300 struct ifacaddr6 *aca, *prev_aca;
301
302 write_lock_bh(&idev->lock);
303 prev_aca = NULL;
304 for (aca = idev->ac_list; aca; aca = aca->aca_next) {
305 if (ipv6_addr_equal(&aca->aca_addr, addr))
306 break;
307 prev_aca = aca;
308 }
309 if (!aca) {
310 write_unlock_bh(&idev->lock);
311 return -ENOENT;
312 }
313 if (--aca->aca_users > 0) {
314 write_unlock_bh(&idev->lock);
315 return 0;
316 }
317 if (prev_aca)
318 prev_aca->aca_next = aca->aca_next;
319 else
320 idev->ac_list = aca->aca_next;
321 write_unlock_bh(&idev->lock);
322 addrconf_leave_solict(idev, &aca->aca_addr);
323
Changli Gaod8d1f302010-06-10 23:31:35 -0700324 dst_hold(&aca->aca_rt->dst);
Denis V. Lunev84f59372008-04-03 13:33:00 -0700325 ip6_del_rt(aca->aca_rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327 aca_put(aca);
328 return 0;
329}
330
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000331/* called with rcu_read_lock() */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000332static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000334 struct inet6_dev *idev = __in6_dev_get(dev);
335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 if (idev == NULL)
337 return -ENODEV;
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000338 return __ipv6_dev_ac_dec(idev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339}
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341/*
342 * check if the interface has this anycast address
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000343 * called with rcu_read_lock()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000345static int ipv6_chk_acast_dev(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
347 struct inet6_dev *idev;
348 struct ifacaddr6 *aca;
349
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000350 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 if (idev) {
352 read_lock_bh(&idev->lock);
353 for (aca = idev->ac_list; aca; aca = aca->aca_next)
354 if (ipv6_addr_equal(&aca->aca_addr, addr))
355 break;
356 read_unlock_bh(&idev->lock);
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -0700357 return aca != NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 }
359 return 0;
360}
361
362/*
363 * check if given interface (or any, if dev==0) has this anycast address
364 */
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700365int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000366 const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367{
Pavel Emelianov7562f872007-05-03 15:13:45 -0700368 int found = 0;
369
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800370 rcu_read_lock();
Eric Dumazetbb69ae02010-06-07 11:42:13 +0000371 if (dev)
372 found = ipv6_chk_acast_dev(dev, addr);
373 else
374 for_each_netdev_rcu(net, dev)
375 if (ipv6_chk_acast_dev(dev, addr)) {
376 found = 1;
377 break;
378 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800379 rcu_read_unlock();
Pavel Emelianov7562f872007-05-03 15:13:45 -0700380 return found;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381}
382
383
384#ifdef CONFIG_PROC_FS
385struct ac6_iter_state {
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700386 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 struct net_device *dev;
388 struct inet6_dev *idev;
389};
390
391#define ac6_seq_private(seq) ((struct ac6_iter_state *)(seq)->private)
392
393static inline struct ifacaddr6 *ac6_get_first(struct seq_file *seq)
394{
395 struct ifacaddr6 *im = NULL;
396 struct ac6_iter_state *state = ac6_seq_private(seq);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700397 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
Pavel Emelianov7562f872007-05-03 15:13:45 -0700399 state->idev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +0000400 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +0000402 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 if (!idev)
404 continue;
405 read_lock_bh(&idev->lock);
406 im = idev->ac_list;
407 if (im) {
408 state->idev = idev;
409 break;
410 }
411 read_unlock_bh(&idev->lock);
412 }
413 return im;
414}
415
416static struct ifacaddr6 *ac6_get_next(struct seq_file *seq, struct ifacaddr6 *im)
417{
418 struct ac6_iter_state *state = ac6_seq_private(seq);
419
420 im = im->aca_next;
421 while (!im) {
Eric Dumazetce81b762009-11-11 17:34:30 +0000422 if (likely(state->idev != NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +0000424
425 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 if (!state->dev) {
427 state->idev = NULL;
428 break;
429 }
Eric Dumazetce81b762009-11-11 17:34:30 +0000430 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 if (!state->idev)
432 continue;
433 read_lock_bh(&state->idev->lock);
434 im = state->idev->ac_list;
435 }
436 return im;
437}
438
439static struct ifacaddr6 *ac6_get_idx(struct seq_file *seq, loff_t pos)
440{
441 struct ifacaddr6 *im = ac6_get_first(seq);
442 if (im)
443 while (pos && (im = ac6_get_next(seq, im)) != NULL)
444 --pos;
445 return pos ? NULL : im;
446}
447
448static void *ac6_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +0000449 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450{
Eric Dumazetce81b762009-11-11 17:34:30 +0000451 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 return ac6_get_idx(seq, *pos);
453}
454
455static void *ac6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
456{
Eric Dumazetce81b762009-11-11 17:34:30 +0000457 struct ifacaddr6 *im = ac6_get_next(seq, v);
458
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 ++*pos;
460 return im;
461}
462
463static void ac6_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +0000464 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
466 struct ac6_iter_state *state = ac6_seq_private(seq);
Eric Dumazetce81b762009-11-11 17:34:30 +0000467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 if (likely(state->idev != NULL)) {
469 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +0000470 state->idev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 }
Eric Dumazetce81b762009-11-11 17:34:30 +0000472 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473}
474
475static int ac6_seq_show(struct seq_file *seq, void *v)
476{
477 struct ifacaddr6 *im = (struct ifacaddr6 *)v;
478 struct ac6_iter_state *state = ac6_seq_private(seq);
479
Harvey Harrison4b7a4272008-10-29 12:50:24 -0700480 seq_printf(seq, "%-4d %-15s %pi6 %5d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -0700482 &im->aca_addr, im->aca_users);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return 0;
484}
485
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700486static const struct seq_operations ac6_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 .start = ac6_seq_start,
488 .next = ac6_seq_next,
489 .stop = ac6_seq_stop,
490 .show = ac6_seq_show,
491};
492
493static int ac6_seq_open(struct inode *inode, struct file *file)
494{
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700495 return seq_open_net(inode, file, &ac6_seq_ops,
496 sizeof(struct ac6_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
Arjan van de Ven9a321442007-02-12 00:55:35 -0800499static const struct file_operations ac6_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 .owner = THIS_MODULE,
501 .open = ac6_seq_open,
502 .read = seq_read,
503 .llseek = seq_lseek,
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700504 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505};
506
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000507int __net_init ac6_proc_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508{
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700509 if (!proc_net_fops_create(net, "anycast6", S_IRUGO, &ac6_seq_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 return -ENOMEM;
511
512 return 0;
513}
514
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700515void ac6_proc_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516{
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700517 proc_net_remove(net, "anycast6");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518}
519#endif
520