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net: Clean up explicit ->tx_queue references in link watch.
[net-next-2.6.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
1da177e4
LT		 9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15/*
16 * Changes:
17 *
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
21 * unload.
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
24 * packets.
25 * yoshfuji@USAGI : Fixed interval between DAD
26 * packets.
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
30 * support.
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
35 * seq_file.
b1cacb68
YH		 36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
38 * status etc.
1da177e4
LT		 39 */
40
1da177e4
LT		 41#include <linux/errno.h>
42#include <linux/types.h>
43#include <linux/socket.h>
44#include <linux/sockios.h>
1da177e4
LT		 45#include <linux/net.h>
46#include <linux/in6.h>
47#include <linux/netdevice.h>
1823730f 48#include <linux/if_addr.h>
1da177e4
LT		 49#include <linux/if_arp.h>
50#include <linux/if_arcnet.h>
51#include <linux/if_infiniband.h>
52#include <linux/route.h>
53#include <linux/inetdevice.h>
54#include <linux/init.h>
55#ifdef CONFIG_SYSCTL
56#include <linux/sysctl.h>
57#endif
4fc268d2 58#include <linux/capability.h>
1da177e4
LT		 59#include <linux/delay.h>
60#include <linux/notifier.h>
543537bd 61#include <linux/string.h>
1da177e4 62
457c4cbc 63#include <net/net_namespace.h>
1da177e4
LT		 64#include <net/sock.h>
65#include <net/snmp.h>
66
67#include <net/ipv6.h>
68#include <net/protocol.h>
69#include <net/ndisc.h>
70#include <net/ip6_route.h>
71#include <net/addrconf.h>
72#include <net/tcp.h>
73#include <net/ip.h>
5d620266 74#include <net/netlink.h>
f24e3d65 75#include <net/pkt_sched.h>
1da177e4
LT		 76#include <linux/if_tunnel.h>
77#include <linux/rtnetlink.h>
78
79#ifdef CONFIG_IPV6_PRIVACY
80#include <linux/random.h>
1da177e4
LT		 81#endif
82
83#include <asm/uaccess.h>
7f7d9a6b 84#include <asm/unaligned.h>
1da177e4
LT		 85
86#include <linux/proc_fs.h>
87#include <linux/seq_file.h>
88
89/* Set to 3 to get tracing... */
90#define ACONF_DEBUG 2
91
92#if ACONF_DEBUG >= 3
93#define ADBG(x) printk x
94#else
95#define ADBG(x)
96#endif
97
98#define INFINITY_LIFE_TIME 0xFFFFFFFF
99#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
100
101#ifdef CONFIG_SYSCTL
f52295a9 102static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 103static void addrconf_sysctl_unregister(struct inet6_dev *idev);
104#else
105static inline void addrconf_sysctl_register(struct inet6_dev *idev)
106{
107}
108
109static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
110{
111}
1da177e4
LT		 112#endif
113
114#ifdef CONFIG_IPV6_PRIVACY
115static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 116static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 117static void ipv6_regen_rndid(unsigned long data);
118
119static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 120#endif
121
1b34be74 122static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1da177e4
LT		 123static int ipv6_count_addresses(struct inet6_dev *idev);
124
125/*
126 * Configured unicast address hash table
127 */
128static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
129static DEFINE_RWLOCK(addrconf_hash_lock);
130
1da177e4
LT		 131static void addrconf_verify(unsigned long);
132
8d06afab 133static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 134static DEFINE_SPINLOCK(addrconf_verify_lock);
135
136static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
137static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
138
139static int addrconf_ifdown(struct net_device *dev, int how);
140
e431b8c0 141static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 142static void addrconf_dad_timer(unsigned long data);
143static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 144static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 145static void addrconf_rs_timer(unsigned long data);
146static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
147static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148
1ab1457c 149static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 150 struct prefix_info *pinfo);
06bfe655
DL		 151static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
152 struct net_device *dev);
1da177e4 153
e041c683 154static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 155
ab32ea5d 156struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 157 .forwarding = 0,
158 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
159 .mtu6 = IPV6_MIN_MTU,
160 .accept_ra = 1,
161 .accept_redirects = 1,
162 .autoconf = 1,
163 .force_mld_version = 0,
164 .dad_transmits = 1,
165 .rtr_solicits = MAX_RTR_SOLICITATIONS,
166 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
167 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
168#ifdef CONFIG_IPV6_PRIVACY
169 .use_tempaddr = 0,
170 .temp_valid_lft = TEMP_VALID_LIFETIME,
171 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
172 .regen_max_retry = REGEN_MAX_RETRY,
173 .max_desync_factor = MAX_DESYNC_FACTOR,
174#endif
175 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 176 .accept_ra_defrtr = 1,
c4fd30eb 177 .accept_ra_pinfo = 1,
930d6ff2
YH		 178#ifdef CONFIG_IPV6_ROUTER_PREF
179 .accept_ra_rtr_pref = 1,
52e16356 180 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 181#ifdef CONFIG_IPV6_ROUTE_INFO
182 .accept_ra_rt_info_max_plen = 0,
183#endif
930d6ff2 184#endif
fbea49e1 185 .proxy_ndp = 0,
0bcbc926 186 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 187 .disable_ipv6 = 0,
1b34be74 188 .accept_dad = 1,
1da177e4
LT		 189};
190
ab32ea5d 191static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 192 .forwarding = 0,
193 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
194 .mtu6 = IPV6_MIN_MTU,
195 .accept_ra = 1,
196 .accept_redirects = 1,
197 .autoconf = 1,
198 .dad_transmits = 1,
199 .rtr_solicits = MAX_RTR_SOLICITATIONS,
200 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
201 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
202#ifdef CONFIG_IPV6_PRIVACY
203 .use_tempaddr = 0,
204 .temp_valid_lft = TEMP_VALID_LIFETIME,
205 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
206 .regen_max_retry = REGEN_MAX_RETRY,
207 .max_desync_factor = MAX_DESYNC_FACTOR,
208#endif
209 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 210 .accept_ra_defrtr = 1,
c4fd30eb 211 .accept_ra_pinfo = 1,
930d6ff2
YH		 212#ifdef CONFIG_IPV6_ROUTER_PREF
213 .accept_ra_rtr_pref = 1,
52e16356 214 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 215#ifdef CONFIG_IPV6_ROUTE_INFO
216 .accept_ra_rt_info_max_plen = 0,
217#endif
930d6ff2 218#endif
fbea49e1 219 .proxy_ndp = 0,
0bcbc926 220 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 221 .disable_ipv6 = 0,
1b34be74 222 .accept_dad = 1,
1da177e4
LT		 223};
224
225/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 226const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4 227const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
f3ee4010
YH		 228const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
229const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
1da177e4 230
f24e3d65
MC		 231/* Check if a valid qdisc is available */
232static inline int addrconf_qdisc_ok(struct net_device *dev)
233{
b0e1e646
DM		 234 struct netdev_queue *txq = &dev->tx_queue;
235 return (txq->qdisc != &noop_qdisc);
f24e3d65
MC		 236}
237
2b5ead46
YH		 238/* Check if a route is valid prefix route */
239static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
240{
241 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
242}
243
1da177e4
LT		 244static void addrconf_del_timer(struct inet6_ifaddr *ifp)
245{
246 if (del_timer(&ifp->timer))
247 __in6_ifa_put(ifp);
248}
249
250enum addrconf_timer_t
251{
252 AC_NONE,
253 AC_DAD,
254 AC_RS,
255};
256
257static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
258 enum addrconf_timer_t what,
259 unsigned long when)
260{
261 if (!del_timer(&ifp->timer))
262 in6_ifa_hold(ifp);
263
264 switch (what) {
265 case AC_DAD:
266 ifp->timer.function = addrconf_dad_timer;
267 break;
268 case AC_RS:
269 ifp->timer.function = addrconf_rs_timer;
270 break;
271 default:;
272 }
273 ifp->timer.expires = jiffies + when;
274 add_timer(&ifp->timer);
275}
276
7f7d9a6b
HX		 277static int snmp6_alloc_dev(struct inet6_dev *idev)
278{
7f7d9a6b 279 if (snmp_mib_init((void **)idev->stats.ipv6,
c69bce20 280 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b
HX		 281 goto err_ip;
282 if (snmp_mib_init((void **)idev->stats.icmpv6,
c69bce20 283 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 284 goto err_icmp;
14878f75 285 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
c69bce20 286 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 287 goto err_icmpmsg;
7f7d9a6b
HX		 288
289 return 0;
290
14878f75
DS		 291err_icmpmsg:
292 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 293err_icmp:
294 snmp_mib_free((void **)idev->stats.ipv6);
295err_ip:
aaf70ec7 296 return -ENOMEM;
7f7d9a6b
HX		 297}
298
16910b98 299static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 300{
14878f75 301 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 302 snmp_mib_free((void **)idev->stats.icmpv6);
303 snmp_mib_free((void **)idev->stats.ipv6);
7f7d9a6b
HX		 304}
305
1da177e4
LT		 306/* Nobody refers to this device, we may destroy it. */
307
8814c4b5
YH		 308static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
309{
310 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
311 kfree(idev);
312}
313
1da177e4
LT		 314void in6_dev_finish_destroy(struct inet6_dev *idev)
315{
316 struct net_device *dev = idev->dev;
317 BUG_TRAP(idev->addr_list==NULL);
318 BUG_TRAP(idev->mc_list==NULL);
319#ifdef NET_REFCNT_DEBUG
320 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
321#endif
322 dev_put(dev);
323 if (!idev->dead) {
324 printk("Freeing alive inet6 device %p\n", idev);
325 return;
326 }
327 snmp6_free_dev(idev);
8814c4b5 328 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 329}
330
7159039a
YH		 331EXPORT_SYMBOL(in6_dev_finish_destroy);
332
1da177e4
LT		 333static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
334{
335 struct inet6_dev *ndev;
336
337 ASSERT_RTNL();
338
339 if (dev->mtu < IPV6_MIN_MTU)
340 return NULL;
341
1ab1457c 342 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 343
1ab1457c
YH		 344 if (ndev == NULL)
345 return NULL;
322f74a4
IO		 346
347 rwlock_init(&ndev->lock);
348 ndev->dev = dev;
c346dca1 349 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 350 ndev->cnf.mtu6 = dev->mtu;
351 ndev->cnf.sysctl = NULL;
352 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
353 if (ndev->nd_parms == NULL) {
354 kfree(ndev);
355 return NULL;
356 }
0187bdfb
BH		 357 if (ndev->cnf.forwarding)
358 dev_disable_lro(dev);
322f74a4
IO		 359 /* We refer to the device */
360 dev_hold(dev);
1da177e4 361
322f74a4
IO		 362 if (snmp6_alloc_dev(ndev) < 0) {
363 ADBG((KERN_WARNING
364 "%s(): cannot allocate memory for statistics; dev=%s.\n",
0dc47877 365 __func__, dev->name));
322f74a4
IO		 366 neigh_parms_release(&nd_tbl, ndev->nd_parms);
367 ndev->dead = 1;
368 in6_dev_finish_destroy(ndev);
369 return NULL;
370 }
1da177e4 371
322f74a4
IO		 372 if (snmp6_register_dev(ndev) < 0) {
373 ADBG((KERN_WARNING
374 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
0dc47877 375 __func__, dev->name));
322f74a4
IO		 376 neigh_parms_release(&nd_tbl, ndev->nd_parms);
377 ndev->dead = 1;
378 in6_dev_finish_destroy(ndev);
379 return NULL;
380 }
381
382 /* One reference from device. We must do this before
383 * we invoke __ipv6_regen_rndid().
384 */
385 in6_dev_hold(ndev);
1da177e4 386
1b34be74
YH		 387 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
388 ndev->cnf.accept_dad = -1;
389
b077d7ab
YH		 390#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
391 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
392 printk(KERN_INFO
393 "%s: Disabled Multicast RS\n",
394 dev->name);
395 ndev->cnf.rtr_solicits = 0;
396 }
397#endif
398
1da177e4 399#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 400 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 401 if ((dev->flags&IFF_LOOPBACK) ||
402 dev->type == ARPHRD_TUNNEL ||
9625ed72 403 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 404 dev->type == ARPHRD_SIT ||
0be669bb 405 dev->type == ARPHRD_NONE) {
322f74a4
IO		 406 printk(KERN_INFO
407 "%s: Disabled Privacy Extensions\n",
408 dev->name);
409 ndev->cnf.use_tempaddr = -1;
410 } else {
411 in6_dev_hold(ndev);
412 ipv6_regen_rndid((unsigned long) ndev);
413 }
1da177e4
LT		 414#endif
415
f24e3d65 416 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 417 ndev->if_flags |= IF_READY;
418
322f74a4
IO		 419 ipv6_mc_init_dev(ndev);
420 ndev->tstamp = jiffies;
f52295a9 421 addrconf_sysctl_register(ndev);
30c4cf57
DS		 422 /* protected by rtnl_lock */
423 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 424
425 /* Join all-node multicast group */
f3ee4010 426 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 427
1da177e4
LT		 428 return ndev;
429}
430
cee89473 431static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 432{
433 struct inet6_dev *idev;
434
435 ASSERT_RTNL();
436
437 if ((idev = __in6_dev_get(dev)) == NULL) {
438 if ((idev = ipv6_add_dev(dev)) == NULL)
439 return NULL;
440 }
c5e33bdd 441
1da177e4
LT		 442 if (dev->flags&IFF_UP)
443 ipv6_mc_up(idev);
444 return idev;
445}
446
447#ifdef CONFIG_SYSCTL
448static void dev_forward_change(struct inet6_dev *idev)
449{
450 struct net_device *dev;
451 struct inet6_ifaddr *ifa;
1da177e4
LT		 452
453 if (!idev)
454 return;
455 dev = idev->dev;
0187bdfb
BH		 456 if (idev->cnf.forwarding)
457 dev_disable_lro(dev);
1da177e4 458 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 459 if (idev->cnf.forwarding)
f3ee4010 460 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 461 else
f3ee4010 462 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4
LT		 463 }
464 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 465 if (ifa->flags&IFA_F_TENTATIVE)
466 continue;
1da177e4
LT		 467 if (idev->cnf.forwarding)
468 addrconf_join_anycast(ifa);
469 else
470 addrconf_leave_anycast(ifa);
471 }
472}
473
474
e186932b 475static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 476{
477 struct net_device *dev;
478 struct inet6_dev *idev;
479
480 read_lock(&dev_base_lock);
bff16c2f 481 for_each_netdev(net, dev) {
8814c4b5 482 rcu_read_lock();
1da177e4
LT		 483 idev = __in6_dev_get(dev);
484 if (idev) {
e186932b
PE		 485 int changed = (!idev->cnf.forwarding) ^ (!newf);
486 idev->cnf.forwarding = newf;
1da177e4
LT		 487 if (changed)
488 dev_forward_change(idev);
489 }
8814c4b5 490 rcu_read_unlock();
1da177e4
LT		 491 }
492 read_unlock(&dev_base_lock);
493}
c8fecf22
PE		 494
495static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
496{
bff16c2f
PE		 497 struct net *net;
498
499 net = (struct net *)table->extra2;
441fc2a2 500 if (p == &net->ipv6.devconf_dflt->forwarding)
c8fecf22
PE		 501 return;
502
0187bdfb 503 rtnl_lock();
e186932b
PE		 504 if (p == &net->ipv6.devconf_all->forwarding) {
505 __s32 newf = net->ipv6.devconf_all->forwarding;
506 net->ipv6.devconf_dflt->forwarding = newf;
507 addrconf_forward_change(net, newf);
c8fecf22
PE		 508 } else if ((!*p) ^ (!old))
509 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 510 rtnl_unlock();
c8fecf22
PE		 511
512 if (*p)
7b4da532 513 rt6_purge_dflt_routers(net);
c8fecf22 514}
1da177e4
LT		 515#endif
516
517/* Nobody refers to this ifaddr, destroy it */
518
519void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
520{
521 BUG_TRAP(ifp->if_next==NULL);
522 BUG_TRAP(ifp->lst_next==NULL);
523#ifdef NET_REFCNT_DEBUG
524 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
525#endif
526
527 in6_dev_put(ifp->idev);
528
529 if (del_timer(&ifp->timer))
530 printk("Timer is still running, when freeing ifa=%p\n", ifp);
531
532 if (!ifp->dead) {
533 printk("Freeing alive inet6 address %p\n", ifp);
534 return;
535 }
536 dst_release(&ifp->rt->u.dst);
537
538 kfree(ifp);
539}
540
e55ffac6
BH		 541static void
542ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
543{
544 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 545 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 546
547 /*
548 * Each device address list is sorted in order of scope -
549 * global before linklocal.
550 */
551 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
552 ifap = &ifa->if_next) {
8a6ce0c0 553 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 554 break;
555 }
556
557 ifp->if_next = *ifap;
558 *ifap = ifp;
559}
560
3eb84f49
YH		 561/*
562 * Hash function taken from net_alias.c
563 */
564static u8 ipv6_addr_hash(const struct in6_addr *addr)
565{
566 __u32 word;
567
568 /*
569 * We perform the hash function over the last 64 bits of the address
570 * This will include the IEEE address token on links that support it.
571 */
572
573 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
574 word ^= (word >> 16);
575 word ^= (word >> 8);
576
577 return ((word ^ (word >> 4)) & 0x0f);
578}
579
1da177e4
LT		 580/* On success it returns ifp with increased reference count */
581
582static struct inet6_ifaddr *
583ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 584 int scope, u32 flags)
1da177e4
LT		 585{
586 struct inet6_ifaddr *ifa = NULL;
587 struct rt6_info *rt;
588 int hash;
589 int err = 0;
d68b8270
YH		 590 int addr_type = ipv6_addr_type(addr);
591
592 if (addr_type == IPV6_ADDR_ANY ||
593 addr_type & IPV6_ADDR_MULTICAST ||
594 (!(idev->dev->flags & IFF_LOOPBACK) &&
595 addr_type & IPV6_ADDR_LOOPBACK))
596 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 597
8814c4b5 598 rcu_read_lock_bh();
1da177e4
LT		 599 if (idev->dead) {
600 err = -ENODEV; /*XXX*/
601 goto out2;
602 }
603
604 write_lock(&addrconf_hash_lock);
605
606 /* Ignore adding duplicate addresses on an interface */
c346dca1 607 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 608 ADBG(("ipv6_add_addr: already assigned\n"));
609 err = -EEXIST;
610 goto out;
611 }
612
322f74a4 613 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 614
615 if (ifa == NULL) {
616 ADBG(("ipv6_add_addr: malloc failed\n"));
617 err = -ENOBUFS;
618 goto out;
619 }
620
621 rt = addrconf_dst_alloc(idev, addr, 0);
622 if (IS_ERR(rt)) {
623 err = PTR_ERR(rt);
624 goto out;
625 }
626
1da177e4
LT		 627 ipv6_addr_copy(&ifa->addr, addr);
628
629 spin_lock_init(&ifa->lock);
630 init_timer(&ifa->timer);
631 ifa->timer.data = (unsigned long) ifa;
632 ifa->scope = scope;
633 ifa->prefix_len = pfxlen;
634 ifa->flags = flags | IFA_F_TENTATIVE;
635 ifa->cstamp = ifa->tstamp = jiffies;
636
57f5f544
KF		 637 ifa->rt = rt;
638
95c385b4
NH		 639 /*
640 * part one of RFC 4429, section 3.3
641 * We should not configure an address as
642 * optimistic if we do not yet know the link
643 * layer address of our nexhop router
644 */
645
646 if (rt->rt6i_nexthop == NULL)
647 ifa->flags &= ~IFA_F_OPTIMISTIC;
648
1da177e4
LT		 649 ifa->idev = idev;
650 in6_dev_hold(idev);
651 /* For caller */
652 in6_ifa_hold(ifa);
653
654 /* Add to big hash table */
655 hash = ipv6_addr_hash(addr);
656
657 ifa->lst_next = inet6_addr_lst[hash];
658 inet6_addr_lst[hash] = ifa;
659 in6_ifa_hold(ifa);
660 write_unlock(&addrconf_hash_lock);
661
662 write_lock(&idev->lock);
663 /* Add to inet6_dev unicast addr list. */
e55ffac6 664 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 665
666#ifdef CONFIG_IPV6_PRIVACY
667 if (ifa->flags&IFA_F_TEMPORARY) {
668 ifa->tmp_next = idev->tempaddr_list;
669 idev->tempaddr_list = ifa;
670 in6_ifa_hold(ifa);
671 }
672#endif
673
1da177e4
LT		 674 in6_ifa_hold(ifa);
675 write_unlock(&idev->lock);
676out2:
8814c4b5 677 rcu_read_unlock_bh();
1da177e4 678
fd92833a 679 if (likely(err == 0))
e041c683 680 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 681 else {
682 kfree(ifa);
683 ifa = ERR_PTR(err);
684 }
685
686 return ifa;
687out:
688 write_unlock(&addrconf_hash_lock);
689 goto out2;
690}
691
692/* This function wants to get referenced ifp and releases it before return */
693
694static void ipv6_del_addr(struct inet6_ifaddr *ifp)
695{
696 struct inet6_ifaddr *ifa, **ifap;
697 struct inet6_dev *idev = ifp->idev;
698 int hash;
699 int deleted = 0, onlink = 0;
700 unsigned long expires = jiffies;
701
702 hash = ipv6_addr_hash(&ifp->addr);
703
704 ifp->dead = 1;
705
706 write_lock_bh(&addrconf_hash_lock);
707 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
708 ifap = &ifa->lst_next) {
709 if (ifa == ifp) {
710 *ifap = ifa->lst_next;
711 __in6_ifa_put(ifp);
712 ifa->lst_next = NULL;
713 break;
714 }
715 }
716 write_unlock_bh(&addrconf_hash_lock);
717
718 write_lock_bh(&idev->lock);
719#ifdef CONFIG_IPV6_PRIVACY
720 if (ifp->flags&IFA_F_TEMPORARY) {
721 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
722 ifap = &ifa->tmp_next) {
723 if (ifa == ifp) {
724 *ifap = ifa->tmp_next;
725 if (ifp->ifpub) {
726 in6_ifa_put(ifp->ifpub);
727 ifp->ifpub = NULL;
728 }
729 __in6_ifa_put(ifp);
730 ifa->tmp_next = NULL;
731 break;
732 }
733 }
734 }
735#endif
736
1d142804 737 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 738 if (ifa == ifp) {
739 *ifap = ifa->if_next;
740 __in6_ifa_put(ifp);
741 ifa->if_next = NULL;
742 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
743 break;
744 deleted = 1;
1d142804 745 continue;
1da177e4
LT		 746 } else if (ifp->flags & IFA_F_PERMANENT) {
747 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
748 ifp->prefix_len)) {
749 if (ifa->flags & IFA_F_PERMANENT) {
750 onlink = 1;
751 if (deleted)
752 break;
753 } else {
754 unsigned long lifetime;
755
756 if (!onlink)
757 onlink = -1;
758
759 spin_lock(&ifa->lock);
4bed72e4
YH		 760
761 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
762 /*
763 * Note: Because this address is
764 * not permanent, lifetime <
765 * LONG_MAX / HZ here.
766 */
1da177e4
LT		 767 if (time_before(expires,
768 ifa->tstamp + lifetime * HZ))
769 expires = ifa->tstamp + lifetime * HZ;
770 spin_unlock(&ifa->lock);
771 }
772 }
773 }
1d142804 774 ifap = &ifa->if_next;
1da177e4
LT		 775 }
776 write_unlock_bh(&idev->lock);
777
b2238566
AV		 778 addrconf_del_timer(ifp);
779
1da177e4
LT		 780 ipv6_ifa_notify(RTM_DELADDR, ifp);
781
e041c683 782 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 783
1da177e4
LT		 784 /*
785 * Purge or update corresponding prefix
786 *
787 * 1) we don't purge prefix here if address was not permanent.
788 * prefix is managed by its own lifetime.
789 * 2) if there're no addresses, delete prefix.
790 * 3) if there're still other permanent address(es),
791 * corresponding prefix is still permanent.
792 * 4) otherwise, update prefix lifetime to the
793 * longest valid lifetime among the corresponding
794 * addresses on the device.
795 * Note: subsequent RA will update lifetime.
796 *
797 * --yoshfuji
798 */
799 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
800 struct in6_addr prefix;
801 struct rt6_info *rt;
c346dca1 802 struct net *net = dev_net(ifp->idev->dev);
1da177e4 803 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 804 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 805
2b5ead46 806 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 807 if (onlink == 0) {
e0a1ad73 808 ip6_del_rt(rt);
1da177e4
LT		 809 rt = NULL;
810 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
811 rt->rt6i_expires = expires;
812 rt->rt6i_flags |= RTF_EXPIRES;
813 }
814 }
815 dst_release(&rt->u.dst);
816 }
817
818 in6_ifa_put(ifp);
819}
820
821#ifdef CONFIG_IPV6_PRIVACY
822static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
823{
824 struct inet6_dev *idev = ifp->idev;
825 struct in6_addr addr, *tmpaddr;
826 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 827 unsigned long regen_advance;
1da177e4
LT		 828 int tmp_plen;
829 int ret = 0;
830 int max_addresses;
95c385b4 831 u32 addr_flags;
1da177e4
LT		 832
833 write_lock(&idev->lock);
834 if (ift) {
835 spin_lock_bh(&ift->lock);
836 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
837 spin_unlock_bh(&ift->lock);
838 tmpaddr = &addr;
839 } else {
840 tmpaddr = NULL;
841 }
842retry:
843 in6_dev_hold(idev);
844 if (idev->cnf.use_tempaddr <= 0) {
845 write_unlock(&idev->lock);
846 printk(KERN_INFO
847 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
848 in6_dev_put(idev);
849 ret = -1;
850 goto out;
851 }
852 spin_lock_bh(&ifp->lock);
853 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
854 idev->cnf.use_tempaddr = -1; /*XXX*/
855 spin_unlock_bh(&ifp->lock);
856 write_unlock(&idev->lock);
857 printk(KERN_WARNING
858 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
859 in6_dev_put(idev);
860 ret = -1;
861 goto out;
862 }
863 in6_ifa_hold(ifp);
864 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
865 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
866 spin_unlock_bh(&ifp->lock);
867 write_unlock(&idev->lock);
868 printk(KERN_WARNING
869 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
870 in6_ifa_put(ifp);
871 in6_dev_put(idev);
872 ret = -1;
873 goto out;
874 }
875 memcpy(&addr.s6_addr[8], idev->rndid, 8);
876 tmp_valid_lft = min_t(__u32,
877 ifp->valid_lft,
878 idev->cnf.temp_valid_lft);
1ab1457c
YH		 879 tmp_prefered_lft = min_t(__u32,
880 ifp->prefered_lft,
1da177e4
LT		 881 idev->cnf.temp_prefered_lft - desync_factor / HZ);
882 tmp_plen = ifp->prefix_len;
883 max_addresses = idev->cnf.max_addresses;
884 tmp_cstamp = ifp->cstamp;
885 tmp_tstamp = ifp->tstamp;
886 spin_unlock_bh(&ifp->lock);
887
eac55bf9
BB		 888 regen_advance = idev->cnf.regen_max_retry *
889 idev->cnf.dad_transmits *
890 idev->nd_parms->retrans_time / HZ;
1da177e4 891 write_unlock(&idev->lock);
95c385b4 892
eac55bf9
BB		 893 /* A temporary address is created only if this calculated Preferred
894 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
895 * an implementation must not create a temporary address with a zero
896 * Preferred Lifetime.
897 */
898 if (tmp_prefered_lft <= regen_advance) {
899 in6_ifa_put(ifp);
900 in6_dev_put(idev);
901 ret = -1;
902 goto out;
903 }
904
95c385b4
NH		 905 addr_flags = IFA_F_TEMPORARY;
906 /* set in addrconf_prefix_rcv() */
907 if (ifp->flags & IFA_F_OPTIMISTIC)
908 addr_flags |= IFA_F_OPTIMISTIC;
909
1da177e4 910 ift = !max_addresses ||
1ab1457c 911 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 912 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 913 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
914 addr_flags) : NULL;
1da177e4
LT		 915 if (!ift || IS_ERR(ift)) {
916 in6_ifa_put(ifp);
917 in6_dev_put(idev);
918 printk(KERN_INFO
919 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
920 tmpaddr = &addr;
921 write_lock(&idev->lock);
922 goto retry;
923 }
924
925 spin_lock_bh(&ift->lock);
926 ift->ifpub = ifp;
927 ift->valid_lft = tmp_valid_lft;
928 ift->prefered_lft = tmp_prefered_lft;
929 ift->cstamp = tmp_cstamp;
930 ift->tstamp = tmp_tstamp;
931 spin_unlock_bh(&ift->lock);
932
933 addrconf_dad_start(ift, 0);
934 in6_ifa_put(ift);
935 in6_dev_put(idev);
936out:
937 return ret;
938}
939#endif
940
941/*
072047e4 942 * Choose an appropriate source address (RFC3484)
1da177e4 943 */
a9b05723
YH		 944enum {
945 IPV6_SADDR_RULE_INIT = 0,
946 IPV6_SADDR_RULE_LOCAL,
947 IPV6_SADDR_RULE_SCOPE,
948 IPV6_SADDR_RULE_PREFERRED,
949#ifdef CONFIG_IPV6_MIP6
950 IPV6_SADDR_RULE_HOA,
951#endif
952 IPV6_SADDR_RULE_OIF,
953 IPV6_SADDR_RULE_LABEL,
954#ifdef CONFIG_IPV6_PRIVACY
955 IPV6_SADDR_RULE_PRIVACY,
956#endif
957 IPV6_SADDR_RULE_ORCHID,
958 IPV6_SADDR_RULE_PREFIX,
959 IPV6_SADDR_RULE_MAX
960};
961
072047e4 962struct ipv6_saddr_score {
a9b05723
YH		 963 int rule;
964 int addr_type;
965 struct inet6_ifaddr *ifa;
966 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
967 int scopedist;
968 int matchlen;
072047e4
YH		 969};
970
a9b05723 971struct ipv6_saddr_dst {
9acd9f3a 972 const struct in6_addr *addr;
a9b05723
YH		 973 int ifindex;
974 int scope;
975 int label;
7cbca67c 976 unsigned int prefs;
a9b05723 977};
072047e4 978
b6f99a21 979static inline int ipv6_saddr_preferred(int type)
1da177e4 980{
072047e4
YH		 981 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
982 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
983 return 1;
984 return 0;
1da177e4
LT		 985}
986
3de23255
BT		 987static int ipv6_get_saddr_eval(struct net *net,
988 struct ipv6_saddr_score *score,
a9b05723
YH		 989 struct ipv6_saddr_dst *dst,
990 int i)
991{
992 int ret;
993
994 if (i <= score->rule) {
995 switch (i) {
996 case IPV6_SADDR_RULE_SCOPE:
997 ret = score->scopedist;
998 break;
999 case IPV6_SADDR_RULE_PREFIX:
1000 ret = score->matchlen;
1001 break;
1002 default:
1003 ret = !!test_bit(i, score->scorebits);
1004 }
1005 goto out;
1006 }
1007
1008 switch (i) {
1009 case IPV6_SADDR_RULE_INIT:
1010 /* Rule 0: remember if hiscore is not ready yet */
1011 ret = !!score->ifa;
1012 break;
1013 case IPV6_SADDR_RULE_LOCAL:
1014 /* Rule 1: Prefer same address */
1015 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1016 break;
1017 case IPV6_SADDR_RULE_SCOPE:
1018 /* Rule 2: Prefer appropriate scope
1019 *
1020 * ret
1021 * ^
1022 * -1 | d 15
1023 * ---+--+-+---> scope
1024 * |
1025 * | d is scope of the destination.
1026 * B-d | \
1027 * | \ <- smaller scope is better if
1028 * B-15 | \ if scope is enough for destinaion.
1029 * | ret = B - scope (-1 <= scope >= d <= 15).
1030 * d-C-1 | /
1031 * |/ <- greater is better
1032 * -C / if scope is not enough for destination.
1033 * /| ret = scope - C (-1 <= d < scope <= 15).
1034 *
1035 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1036 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1037 * Assume B = 0 and we get C > 29.
1038 */
1039 ret = __ipv6_addr_src_scope(score->addr_type);
1040 if (ret >= dst->scope)
1041 ret = -ret;
1042 else
1043 ret -= 128; /* 30 is enough */
1044 score->scopedist = ret;
1045 break;
1046 case IPV6_SADDR_RULE_PREFERRED:
1047 /* Rule 3: Avoid deprecated and optimistic addresses */
1048 ret = ipv6_saddr_preferred(score->addr_type) ||
1049 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1050 break;
1051#ifdef CONFIG_IPV6_MIP6
1052 case IPV6_SADDR_RULE_HOA:
7cbca67c 1053 {
a9b05723 1054 /* Rule 4: Prefer home address */
7cbca67c
YH		 1055 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1056 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1057 break;
7cbca67c 1058 }
a9b05723
YH		 1059#endif
1060 case IPV6_SADDR_RULE_OIF:
1061 /* Rule 5: Prefer outgoing interface */
1062 ret = (!dst->ifindex ||
1063 dst->ifindex == score->ifa->idev->dev->ifindex);
1064 break;
1065 case IPV6_SADDR_RULE_LABEL:
1066 /* Rule 6: Prefer matching label */
3de23255
BT		 1067 ret = ipv6_addr_label(net,
1068 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1069 score->ifa->idev->dev->ifindex) == dst->label;
1070 break;
1071#ifdef CONFIG_IPV6_PRIVACY
1072 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1073 {
a9b05723
YH		 1074 /* Rule 7: Prefer public address
1075 * Note: prefer temprary address if use_tempaddr >= 2
1076 */
7cbca67c
YH		 1077 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1078 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1079 score->ifa->idev->cnf.use_tempaddr >= 2;
1080 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1081 break;
7cbca67c 1082 }
a9b05723
YH		 1083#endif
1084 case IPV6_SADDR_RULE_ORCHID:
1085 /* Rule 8-: Prefer ORCHID vs ORCHID or
1086 * non-ORCHID vs non-ORCHID
1087 */
1088 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1089 ipv6_addr_orchid(dst->addr));
1090 break;
1091 case IPV6_SADDR_RULE_PREFIX:
1092 /* Rule 8: Use longest matching prefix */
1093 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1094 dst->addr);
1095 break;
1096 default:
1097 ret = 0;
1098 }
1099
1100 if (ret)
1101 __set_bit(i, score->scorebits);
1102 score->rule = i;
1103out:
1104 return ret;
1105}
1106
1107int ipv6_dev_get_saddr(struct net_device *dst_dev,
9acd9f3a 1108 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1109 struct in6_addr *saddr)
1da177e4 1110{
a9b05723
YH		 1111 struct ipv6_saddr_score scores[2],
1112 *score = &scores[0], *hiscore = &scores[1];
c346dca1 1113 struct net *net = dev_net(dst_dev);
a9b05723 1114 struct ipv6_saddr_dst dst;
072047e4 1115 struct net_device *dev;
a9b05723 1116 int dst_type;
1da177e4 1117
a9b05723
YH		 1118 dst_type = __ipv6_addr_type(daddr);
1119 dst.addr = daddr;
1120 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1121 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1122 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1123 dst.prefs = prefs;
a9b05723
YH		 1124
1125 hiscore->rule = -1;
1126 hiscore->ifa = NULL;
1da177e4 1127
072047e4 1128 read_lock(&dev_base_lock);
8814c4b5 1129 rcu_read_lock();
1da177e4 1130
6fda7350 1131 for_each_netdev(net, dev) {
072047e4 1132 struct inet6_dev *idev;
072047e4 1133
a9b05723 1134 /* Candidate Source Address (section 4)
072047e4
YH		 1135 * - multicast and link-local destination address,
1136 * the set of candidate source address MUST only
1137 * include addresses assigned to interfaces
1138 * belonging to the same link as the outgoing
1139 * interface.
1140 * (- For site-local destination addresses, the
1141 * set of candidate source addresses MUST only
1142 * include addresses assigned to interfaces
1143 * belonging to the same site as the outgoing
1144 * interface.)
1145 */
a9b05723
YH		 1146 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1147 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1148 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1149 continue;
1da177e4 1150
1da177e4 1151 idev = __in6_dev_get(dev);
072047e4
YH		 1152 if (!idev)
1153 continue;
1154
1155 read_lock_bh(&idev->lock);
a9b05723
YH		 1156 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1157 int i;
072047e4 1158
a9b05723 1159 /*
6b3ae80a
YH		 1160 * - Tentative Address (RFC2462 section 5.4)
1161 * - A tentative address is not considered
1162 * "assigned to an interface" in the traditional
95c385b4 1163 * sense, unless it is also flagged as optimistic.
6b3ae80a 1164 * - Candidate Source Address (section 4)
072047e4
YH		 1165 * - In any case, anycast addresses, multicast
1166 * addresses, and the unspecified address MUST
1167 * NOT be included in a candidate set.
1168 */
a9b05723
YH		 1169 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1170 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1171 continue;
a9b05723
YH		 1172
1173 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1174
1175 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1176 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1177 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1178 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1179 "assigned as unicast address on %s",
1180 dev->name);
1181 continue;
1182 }
1183
a9b05723
YH		 1184 score->rule = -1;
1185 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1186
1187 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1188 int minihiscore, miniscore;
1189
3de23255
BT		 1190 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1191 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1192
1193 if (minihiscore > miniscore) {
1194 if (i == IPV6_SADDR_RULE_SCOPE &&
1195 score->scopedist > 0) {
1196 /*
1197 * special case:
1198 * each remaining entry
1199 * has too small (not enough)
1200 * scope, because ifa entries
1201 * are sorted by their scope
1202 * values.
1203 */
1204 goto try_nextdev;
1205 }
1206 break;
1207 } else if (minihiscore < miniscore) {
1208 struct ipv6_saddr_score *tmp;
1209
1210 if (hiscore->ifa)
1211 in6_ifa_put(hiscore->ifa);
1212
1213 in6_ifa_hold(score->ifa);
1214
1215 tmp = hiscore;
1216 hiscore = score;
1217 score = tmp;
1218
1219 /* restore our iterator */
1220 score->ifa = hiscore->ifa;
1221
1222 break;
1da177e4 1223 }
072047e4 1224 }
1da177e4 1225 }
a9b05723 1226try_nextdev:
072047e4 1227 read_unlock_bh(&idev->lock);
1da177e4 1228 }
8814c4b5 1229 rcu_read_unlock();
1da177e4
LT		 1230 read_unlock(&dev_base_lock);
1231
a9b05723 1232 if (!hiscore->ifa)
072047e4 1233 return -EADDRNOTAVAIL;
1ab1457c 1234
a9b05723
YH		 1235 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1236 in6_ifa_put(hiscore->ifa);
072047e4 1237 return 0;
1da177e4
LT		 1238}
1239
5e5f3f0f 1240EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1241
95c385b4
NH		 1242int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1243 unsigned char banned_flags)
1da177e4
LT		 1244{
1245 struct inet6_dev *idev;
1246 int err = -EADDRNOTAVAIL;
1247
8814c4b5 1248 rcu_read_lock();
1da177e4
LT		 1249 if ((idev = __in6_dev_get(dev)) != NULL) {
1250 struct inet6_ifaddr *ifp;
1251
1252 read_lock_bh(&idev->lock);
1253 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1254 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1255 ipv6_addr_copy(addr, &ifp->addr);
1256 err = 0;
1257 break;
1258 }
1259 }
1260 read_unlock_bh(&idev->lock);
1261 }
8814c4b5 1262 rcu_read_unlock();
1da177e4
LT		 1263 return err;
1264}
1265
1266static int ipv6_count_addresses(struct inet6_dev *idev)
1267{
1268 int cnt = 0;
1269 struct inet6_ifaddr *ifp;
1270
1271 read_lock_bh(&idev->lock);
1272 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1273 cnt++;
1274 read_unlock_bh(&idev->lock);
1275 return cnt;
1276}
1277
bfeade08
DL		 1278int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1279 struct net_device *dev, int strict)
1da177e4
LT		 1280{
1281 struct inet6_ifaddr * ifp;
1282 u8 hash = ipv6_addr_hash(addr);
1283
1284 read_lock_bh(&addrconf_hash_lock);
1285 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1286 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1287 continue;
1da177e4
LT		 1288 if (ipv6_addr_equal(&ifp->addr, addr) &&
1289 !(ifp->flags&IFA_F_TENTATIVE)) {
1290 if (dev == NULL || ifp->idev->dev == dev ||
1291 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1292 break;
1293 }
1294 }
1295 read_unlock_bh(&addrconf_hash_lock);
1296 return ifp != NULL;
1297}
7159039a
YH		 1298EXPORT_SYMBOL(ipv6_chk_addr);
1299
1da177e4 1300static
06bfe655
DL		 1301int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1302 struct net_device *dev)
1da177e4
LT		 1303{
1304 struct inet6_ifaddr * ifp;
1305 u8 hash = ipv6_addr_hash(addr);
1306
1307 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1308 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1309 continue;
1da177e4
LT		 1310 if (ipv6_addr_equal(&ifp->addr, addr)) {
1311 if (dev == NULL || ifp->idev->dev == dev)
1312 break;
1313 }
1314 }
1315 return ifp != NULL;
1316}
1317
52eeeb84
YH		 1318int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1319{
1320 struct inet6_dev *idev;
1321 struct inet6_ifaddr *ifa;
1322 int onlink;
1323
1324 onlink = 0;
1325 rcu_read_lock();
1326 idev = __in6_dev_get(dev);
1327 if (idev) {
1328 read_lock_bh(&idev->lock);
1329 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1330 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1331 ifa->prefix_len);
1332 if (onlink)
1333 break;
1334 }
1335 read_unlock_bh(&idev->lock);
1336 }
1337 rcu_read_unlock();
1338 return onlink;
1339}
1340
1341EXPORT_SYMBOL(ipv6_chk_prefix);
1342
9acd9f3a 1343struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1344 struct net_device *dev, int strict)
1da177e4
LT		 1345{
1346 struct inet6_ifaddr * ifp;
1347 u8 hash = ipv6_addr_hash(addr);
1348
1349 read_lock_bh(&addrconf_hash_lock);
1350 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1351 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1352 continue;
1da177e4
LT		 1353 if (ipv6_addr_equal(&ifp->addr, addr)) {
1354 if (dev == NULL || ifp->idev->dev == dev ||
1355 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1356 in6_ifa_hold(ifp);
1357 break;
1358 }
1359 }
1360 }
1361 read_unlock_bh(&addrconf_hash_lock);
1362
1363 return ifp;
1364}
1365
1366int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1367{
1368 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1369 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1370 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1371 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1372 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1373 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1374 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1375 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1376
1377 if (!sk2_rcv_saddr && !sk_ipv6only)
1378 return 1;
1379
1380 if (addr_type2 == IPV6_ADDR_ANY &&
1381 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1382 return 1;
1383
1384 if (addr_type == IPV6_ADDR_ANY &&
1385 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1386 return 1;
1387
1388 if (sk2_rcv_saddr6 &&
1389 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1390 return 1;
1391
1392 if (addr_type == IPV6_ADDR_MAPPED &&
1393 !sk2_ipv6only &&
1394 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1395 return 1;
1396
1397 return 0;
1398}
1399
1400/* Gets referenced address, destroys ifaddr */
1401
9f5336e2 1402static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1403{
1da177e4
LT		 1404 if (ifp->flags&IFA_F_PERMANENT) {
1405 spin_lock_bh(&ifp->lock);
1406 addrconf_del_timer(ifp);
1407 ifp->flags |= IFA_F_TENTATIVE;
1408 spin_unlock_bh(&ifp->lock);
1409 in6_ifa_put(ifp);
1410#ifdef CONFIG_IPV6_PRIVACY
1411 } else if (ifp->flags&IFA_F_TEMPORARY) {
1412 struct inet6_ifaddr *ifpub;
1413 spin_lock_bh(&ifp->lock);
1414 ifpub = ifp->ifpub;
1415 if (ifpub) {
1416 in6_ifa_hold(ifpub);
1417 spin_unlock_bh(&ifp->lock);
1418 ipv6_create_tempaddr(ifpub, ifp);
1419 in6_ifa_put(ifpub);
1420 } else {
1421 spin_unlock_bh(&ifp->lock);
1422 }
1423 ipv6_del_addr(ifp);
1424#endif
1425 } else
1426 ipv6_del_addr(ifp);
1427}
1428
3c21edbd
YH		 1429void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1430{
1b34be74
YH		 1431 struct inet6_dev *idev = ifp->idev;
1432 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1433 struct in6_addr addr;
1434
1435 addr.s6_addr32[0] = htonl(0xfe800000);
1436 addr.s6_addr32[1] = 0;
1437
1438 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1439 ipv6_addr_equal(&ifp->addr, &addr)) {
1440 /* DAD failed for link-local based on MAC address */
1441 idev->cnf.disable_ipv6 = 1;
1442 }
1443 }
1444
3c21edbd
YH		 1445 if (net_ratelimit())
1446 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1447 addrconf_dad_stop(ifp);
1448}
1da177e4
LT		 1449
1450/* Join to solicited addr multicast group. */
1451
1452void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1453{
1454 struct in6_addr maddr;
1455
1456 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1457 return;
1458
1459 addrconf_addr_solict_mult(addr, &maddr);
1460 ipv6_dev_mc_inc(dev, &maddr);
1461}
1462
1463void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1464{
1465 struct in6_addr maddr;
1466
1467 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1468 return;
1469
1470 addrconf_addr_solict_mult(addr, &maddr);
1471 __ipv6_dev_mc_dec(idev, &maddr);
1472}
1473
20380731 1474static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1475{
1476 struct in6_addr addr;
1477 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1478 if (ipv6_addr_any(&addr))
1479 return;
1480 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1481}
1482
20380731 1483static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1484{
1485 struct in6_addr addr;
1486 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1487 if (ipv6_addr_any(&addr))
1488 return;
1489 __ipv6_dev_ac_dec(ifp->idev, &addr);
1490}
1491
073a8e0e
YH		 1492static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1493{
1494 if (dev->addr_len != ETH_ALEN)
1495 return -1;
1496 memcpy(eui, dev->dev_addr, 3);
1497 memcpy(eui + 5, dev->dev_addr + 3, 3);
1498
1499 /*
1500 * The zSeries OSA network cards can be shared among various
1501 * OS instances, but the OSA cards have only one MAC address.
1502 * This leads to duplicate address conflicts in conjunction
1503 * with IPv6 if more than one instance uses the same card.
1504 *
1505 * The driver for these cards can deliver a unique 16-bit
1506 * identifier for each instance sharing the same card. It is
1507 * placed instead of 0xFFFE in the interface identifier. The
1508 * "u" bit of the interface identifier is not inverted in this
1509 * case. Hence the resulting interface identifier has local
1510 * scope according to RFC2373.
1511 */
1512 if (dev->dev_id) {
1513 eui[3] = (dev->dev_id >> 8) & 0xFF;
1514 eui[4] = dev->dev_id & 0xFF;
1515 } else {
1516 eui[3] = 0xFF;
1517 eui[4] = 0xFE;
1518 eui[0] ^= 2;
1519 }
1520 return 0;
1521}
1522
1523static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1524{
1525 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1526 if (dev->addr_len != ARCNET_ALEN)
1527 return -1;
1528 memset(eui, 0, 7);
1529 eui[7] = *(u8*)dev->dev_addr;
1530 return 0;
1531}
1532
1533static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1534{
1535 if (dev->addr_len != INFINIBAND_ALEN)
1536 return -1;
1537 memcpy(eui, dev->dev_addr + 12, 8);
1538 eui[0] |= 2;
1539 return 0;
1540}
1541
dfd982ba
YH		 1542int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1543{
1544 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1545 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1546 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1547 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1548 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1549 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1550 eui[1] = 0;
1551 eui[2] = 0x5E;
1552 eui[3] = 0xFE;
1553 memcpy(eui + 4, &addr, 4);
1554 return 0;
1555}
1556EXPORT_SYMBOL(__ipv6_isatap_ifid);
1557
1558static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1559{
1560 if (dev->priv_flags & IFF_ISATAP)
1561 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1562 return -1;
1563}
1564
1da177e4
LT		 1565static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1566{
1567 switch (dev->type) {
1568 case ARPHRD_ETHER:
1569 case ARPHRD_FDDI:
1570 case ARPHRD_IEEE802_TR:
073a8e0e 1571 return addrconf_ifid_eui48(eui, dev);
1da177e4 1572 case ARPHRD_ARCNET:
073a8e0e 1573 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1574 case ARPHRD_INFINIBAND:
073a8e0e 1575 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1576 case ARPHRD_SIT:
dfd982ba 1577 return addrconf_ifid_sit(eui, dev);
1da177e4
LT		 1578 }
1579 return -1;
1580}
1581
1582static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1583{
1584 int err = -1;
1585 struct inet6_ifaddr *ifp;
1586
1587 read_lock_bh(&idev->lock);
1588 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1589 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1590 memcpy(eui, ifp->addr.s6_addr+8, 8);
1591 err = 0;
1592 break;
1593 }
1594 }
1595 read_unlock_bh(&idev->lock);
1596 return err;
1597}
1598
1599#ifdef CONFIG_IPV6_PRIVACY
1600/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1601static int __ipv6_regen_rndid(struct inet6_dev *idev)
1602{
1da177e4 1603regen:
955189ef 1604 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1605 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1606
1607 /*
1608 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1609 * check if generated address is not inappropriate
1610 *
1611 * - Reserved subnet anycast (RFC 2526)
1612 * 11111101 11....11 1xxxxxxx
c7dc89c0 1613 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1614 * 00-00-5E-FE-xx-xx-xx-xx
1615 * - value 0
1616 * - XXX: already assigned to an address on the device
1617 */
1ab1457c 1618 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1619 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1620 (idev->rndid[7]&0x80))
1621 goto regen;
1622 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1623 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1624 goto regen;
1625 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1626 goto regen;
1627 }
1628
1629 return 0;
1630}
1631
1632static void ipv6_regen_rndid(unsigned long data)
1633{
1634 struct inet6_dev *idev = (struct inet6_dev *) data;
1635 unsigned long expires;
1636
8814c4b5 1637 rcu_read_lock_bh();
1da177e4
LT		 1638 write_lock_bh(&idev->lock);
1639
1640 if (idev->dead)
1641 goto out;
1642
1643 if (__ipv6_regen_rndid(idev) < 0)
1644 goto out;
1ab1457c 1645
1da177e4 1646 expires = jiffies +
1ab1457c 1647 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1648 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1649 if (time_before(expires, jiffies)) {
1650 printk(KERN_WARNING
1651 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1652 idev->dev->name);
1653 goto out;
1654 }
1655
1656 if (!mod_timer(&idev->regen_timer, expires))
1657 in6_dev_hold(idev);
1658
1659out:
1660 write_unlock_bh(&idev->lock);
8814c4b5 1661 rcu_read_unlock_bh();
1da177e4
LT		 1662 in6_dev_put(idev);
1663}
1664
1665static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1666 int ret = 0;
1667
1668 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1669 ret = __ipv6_regen_rndid(idev);
1670 return ret;
1671}
1672#endif
1673
1674/*
1675 * Add prefix route.
1676 */
1677
1678static void
1679addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1680 unsigned long expires, u32 flags)
1da177e4 1681{
86872cb5
TG		 1682 struct fib6_config cfg = {
1683 .fc_table = RT6_TABLE_PREFIX,
1684 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1685 .fc_ifindex = dev->ifindex,
1686 .fc_expires = expires,
1687 .fc_dst_len = plen,
1688 .fc_flags = RTF_UP | flags,
c346dca1 1689 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1690 };
1da177e4 1691
86872cb5 1692 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1693
1694 /* Prevent useless cloning on PtP SIT.
1695 This thing is done here expecting that the whole
1696 class of non-broadcast devices need not cloning.
1697 */
0be669bb 1698#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1699 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1700 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1701#endif
1da177e4 1702
86872cb5 1703 ip6_route_add(&cfg);
1da177e4
LT		 1704}
1705
1706/* Create "default" multicast route to the interface */
1707
1708static void addrconf_add_mroute(struct net_device *dev)
1709{
86872cb5
TG		 1710 struct fib6_config cfg = {
1711 .fc_table = RT6_TABLE_LOCAL,
1712 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1713 .fc_ifindex = dev->ifindex,
1714 .fc_dst_len = 8,
1715 .fc_flags = RTF_UP,
c346dca1 1716 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1717 };
1718
1719 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1720
1721 ip6_route_add(&cfg);
1da177e4
LT		 1722}
1723
0be669bb 1724#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1725static void sit_route_add(struct net_device *dev)
1726{
86872cb5
TG		 1727 struct fib6_config cfg = {
1728 .fc_table = RT6_TABLE_MAIN,
1729 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1730 .fc_ifindex = dev->ifindex,
1731 .fc_dst_len = 96,
1732 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1733 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1734 };
1da177e4
LT		 1735
1736 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1737 ip6_route_add(&cfg);
1da177e4 1738}
0be669bb 1739#endif
1da177e4
LT		 1740
1741static void addrconf_add_lroute(struct net_device *dev)
1742{
1743 struct in6_addr addr;
1744
1745 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1746 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1747}
1748
1749static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1750{
1751 struct inet6_dev *idev;
1752
1753 ASSERT_RTNL();
1754
1755 if ((idev = ipv6_find_idev(dev)) == NULL)
1756 return NULL;
1757
1758 /* Add default multicast route */
1759 addrconf_add_mroute(dev);
1760
1761 /* Add link local route */
1762 addrconf_add_lroute(dev);
1763 return idev;
1764}
1765
1766void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1767{
1768 struct prefix_info *pinfo;
1769 __u32 valid_lft;
1770 __u32 prefered_lft;
1771 int addr_type;
1da177e4
LT		 1772 struct inet6_dev *in6_dev;
1773
1774 pinfo = (struct prefix_info *) opt;
1ab1457c 1775
1da177e4
LT		 1776 if (len < sizeof(struct prefix_info)) {
1777 ADBG(("addrconf: prefix option too short\n"));
1778 return;
1779 }
1ab1457c 1780
1da177e4
LT		 1781 /*
1782 * Validation checks ([ADDRCONF], page 19)
1783 */
1784
1785 addr_type = ipv6_addr_type(&pinfo->prefix);
1786
1787 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1788 return;
1789
1790 valid_lft = ntohl(pinfo->valid);
1791 prefered_lft = ntohl(pinfo->prefered);
1792
1793 if (prefered_lft > valid_lft) {
1794 if (net_ratelimit())
1795 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1796 return;
1797 }
1798
1799 in6_dev = in6_dev_get(dev);
1800
1801 if (in6_dev == NULL) {
1802 if (net_ratelimit())
1803 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1804 return;
1805 }
1806
1807 /*
1808 * Two things going on here:
1809 * 1) Add routes for on-link prefixes
1810 * 2) Configure prefixes with the auto flag set
1811 */
1812
4bed72e4
YH		 1813 if (pinfo->onlink) {
1814 struct rt6_info *rt;
1815 unsigned long rt_expires;
1816
6f704992
YH		 1817 /* Avoid arithmetic overflow. Really, we could
1818 * save rt_expires in seconds, likely valid_lft,
1819 * but it would require division in fib gc, that it
1820 * not good.
1821 */
4bed72e4
YH		 1822 if (HZ > USER_HZ)
1823 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1824 else
1825 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1826
4bed72e4
YH		 1827 if (addrconf_finite_timeout(rt_expires))
1828 rt_expires *= HZ;
1da177e4 1829
c346dca1 1830 rt = rt6_lookup(dev_net(dev), &pinfo->prefix, NULL,
6fda7350 1831 dev->ifindex, 1);
1da177e4 1832
2b5ead46 1833 if (rt && addrconf_is_prefix_route(rt)) {
6f704992
YH		 1834 /* Autoconf prefix route */
1835 if (valid_lft == 0) {
1836 ip6_del_rt(rt);
1837 rt = NULL;
4bed72e4 1838 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1839 /* not infinity */
1840 rt->rt6i_expires = jiffies + rt_expires;
1841 rt->rt6i_flags |= RTF_EXPIRES;
1842 } else {
1843 rt->rt6i_flags &= ~RTF_EXPIRES;
1844 rt->rt6i_expires = 0;
1da177e4
LT		 1845 }
1846 } else if (valid_lft) {
6f704992 1847 clock_t expires = 0;
4bed72e4
YH		 1848 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1849 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1850 /* not infinity */
1851 flags |= RTF_EXPIRES;
1852 expires = jiffies_to_clock_t(rt_expires);
1853 }
1da177e4 1854 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1855 dev, expires, flags);
1da177e4
LT		 1856 }
1857 if (rt)
1858 dst_release(&rt->u.dst);
1859 }
1860
1861 /* Try to figure out our local address for this prefix */
1862
1863 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1864 struct inet6_ifaddr * ifp;
1865 struct in6_addr addr;
1866 int create = 0, update_lft = 0;
1867
1868 if (pinfo->prefix_len == 64) {
1869 memcpy(&addr, &pinfo->prefix, 8);
1870 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1871 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1872 in6_dev_put(in6_dev);
1873 return;
1874 }
1875 goto ok;
1876 }
1877 if (net_ratelimit())
1878 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1879 pinfo->prefix_len);
1880 in6_dev_put(in6_dev);
1881 return;
1882
1883ok:
1884
c346dca1 1885 ifp = ipv6_get_ifaddr(dev_net(dev), &addr, dev, 1);
1da177e4
LT		 1886
1887 if (ifp == NULL && valid_lft) {
1888 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1889 u32 addr_flags = 0;
1890
1891#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1892 if (in6_dev->cnf.optimistic_dad &&
1893 !ipv6_devconf.forwarding)
1894 addr_flags = IFA_F_OPTIMISTIC;
1895#endif
1da177e4
LT		 1896
1897 /* Do not allow to create too much of autoconfigured
1898 * addresses; this would be too easy way to crash kernel.
1899 */
1900 if (!max_addresses ||
1901 ipv6_count_addresses(in6_dev) < max_addresses)
1902 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1903 addr_type&IPV6_ADDR_SCOPE_MASK,
1904 addr_flags);
1da177e4
LT		 1905
1906 if (!ifp || IS_ERR(ifp)) {
1907 in6_dev_put(in6_dev);
1908 return;
1909 }
1910
1911 update_lft = create = 1;
1912 ifp->cstamp = jiffies;
1913 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1914 }
1915
1916 if (ifp) {
1917 int flags;
1918 unsigned long now;
1919#ifdef CONFIG_IPV6_PRIVACY
1920 struct inet6_ifaddr *ift;
1921#endif
1922 u32 stored_lft;
1923
1924 /* update lifetime (RFC2462 5.5.3 e) */
1925 spin_lock(&ifp->lock);
1926 now = jiffies;
1927 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1928 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1929 else
1930 stored_lft = 0;
1931 if (!update_lft && stored_lft) {
1932 if (valid_lft > MIN_VALID_LIFETIME ||
1933 valid_lft > stored_lft)
1934 update_lft = 1;
1935 else if (stored_lft <= MIN_VALID_LIFETIME) {
1936 /* valid_lft <= stored_lft is always true */
1937 /* XXX: IPsec */
1938 update_lft = 0;
1939 } else {
1940 valid_lft = MIN_VALID_LIFETIME;
1941 if (valid_lft < prefered_lft)
1942 prefered_lft = valid_lft;
1943 update_lft = 1;
1944 }
1945 }
1946
1947 if (update_lft) {
1948 ifp->valid_lft = valid_lft;
1949 ifp->prefered_lft = prefered_lft;
1950 ifp->tstamp = now;
1951 flags = ifp->flags;
1952 ifp->flags &= ~IFA_F_DEPRECATED;
1953 spin_unlock(&ifp->lock);
1954
1955 if (!(flags&IFA_F_TENTATIVE))
1956 ipv6_ifa_notify(0, ifp);
1957 } else
1958 spin_unlock(&ifp->lock);
1959
1960#ifdef CONFIG_IPV6_PRIVACY
1961 read_lock_bh(&in6_dev->lock);
1962 /* update all temporary addresses in the list */
1963 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1964 /*
1965 * When adjusting the lifetimes of an existing
1966 * temporary address, only lower the lifetimes.
1967 * Implementations must not increase the
1968 * lifetimes of an existing temporary address
1969 * when processing a Prefix Information Option.
1970 */
c6fbfac2
BB		 1971 if (ifp != ift->ifpub)
1972 continue;
1973
1da177e4
LT		 1974 spin_lock(&ift->lock);
1975 flags = ift->flags;
1976 if (ift->valid_lft > valid_lft &&
1977 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1978 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1979 if (ift->prefered_lft > prefered_lft &&
1980 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1981 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1982 spin_unlock(&ift->lock);
1983 if (!(flags&IFA_F_TENTATIVE))
1984 ipv6_ifa_notify(0, ift);
1985 }
1986
1987 if (create && in6_dev->cnf.use_tempaddr > 0) {
1988 /*
1989 * When a new public address is created as described in [ADDRCONF],
1990 * also create a new temporary address.
1991 */
1ab1457c 1992 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1993 ipv6_create_tempaddr(ifp, NULL);
1994 } else {
1995 read_unlock_bh(&in6_dev->lock);
1996 }
1997#endif
1998 in6_ifa_put(ifp);
1999 addrconf_verify(0);
2000 }
2001 }
2002 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2003 in6_dev_put(in6_dev);
2004}
2005
2006/*
2007 * Set destination address.
2008 * Special case for SIT interfaces where we create a new "virtual"
2009 * device.
2010 */
af284937 2011int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 2012{
2013 struct in6_ifreq ireq;
2014 struct net_device *dev;
2015 int err = -EINVAL;
2016
2017 rtnl_lock();
2018
2019 err = -EFAULT;
2020 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2021 goto err_exit;
2022
af284937 2023 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2024
2025 err = -ENODEV;
2026 if (dev == NULL)
2027 goto err_exit;
2028
0be669bb 2029#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2030 if (dev->type == ARPHRD_SIT) {
2031 struct ifreq ifr;
2032 mm_segment_t oldfs;
2033 struct ip_tunnel_parm p;
2034
2035 err = -EADDRNOTAVAIL;
2036 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2037 goto err_exit;
2038
2039 memset(&p, 0, sizeof(p));
2040 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2041 p.iph.saddr = 0;
2042 p.iph.version = 4;
2043 p.iph.ihl = 5;
2044 p.iph.protocol = IPPROTO_IPV6;
2045 p.iph.ttl = 64;
d20b3109 2046 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4
LT		 2047
2048 oldfs = get_fs(); set_fs(KERNEL_DS);
2049 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2050 set_fs(oldfs);
2051
2052 if (err == 0) {
2053 err = -ENOBUFS;
af284937
DL		 2054 dev = __dev_get_by_name(net, p.name);
2055 if (!dev)
1da177e4
LT		 2056 goto err_exit;
2057 err = dev_open(dev);
2058 }
2059 }
0be669bb 2060#endif
1da177e4
LT		 2061
2062err_exit:
2063 rtnl_unlock();
2064 return err;
2065}
2066
2067/*
2068 * Manual configuration of address on an interface
2069 */
af284937 2070static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2071 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2072 __u32 valid_lft)
1da177e4
LT		 2073{
2074 struct inet6_ifaddr *ifp;
2075 struct inet6_dev *idev;
2076 struct net_device *dev;
2077 int scope;
6f704992
YH		 2078 u32 flags;
2079 clock_t expires;
4bed72e4 2080 unsigned long timeout;
1da177e4
LT		 2081
2082 ASSERT_RTNL();
1ab1457c 2083
24ef0da7
TG		 2084 if (plen > 128)
2085 return -EINVAL;
2086
0778769d
NT		 2087 /* check the lifetime */
2088 if (!valid_lft || prefered_lft > valid_lft)
2089 return -EINVAL;
2090
af284937
DL		 2091 dev = __dev_get_by_index(net, ifindex);
2092 if (!dev)
1da177e4 2093 return -ENODEV;
1ab1457c 2094
1da177e4
LT		 2095 if ((idev = addrconf_add_dev(dev)) == NULL)
2096 return -ENOBUFS;
2097
2098 scope = ipv6_addr_scope(pfx);
2099
4bed72e4
YH		 2100 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2101 if (addrconf_finite_timeout(timeout)) {
2102 expires = jiffies_to_clock_t(timeout * HZ);
2103 valid_lft = timeout;
6f704992 2104 flags = RTF_EXPIRES;
4bed72e4
YH		 2105 } else {
2106 expires = 0;
2107 flags = 0;
2108 ifa_flags |= IFA_F_PERMANENT;
6f704992 2109 }
0778769d 2110
4bed72e4
YH		 2111 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2112 if (addrconf_finite_timeout(timeout)) {
2113 if (timeout == 0)
2114 ifa_flags |= IFA_F_DEPRECATED;
2115 prefered_lft = timeout;
2116 }
0778769d
NT		 2117
2118 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2119
1da177e4 2120 if (!IS_ERR(ifp)) {
06aebfb7 2121 spin_lock_bh(&ifp->lock);
0778769d
NT		 2122 ifp->valid_lft = valid_lft;
2123 ifp->prefered_lft = prefered_lft;
2124 ifp->tstamp = jiffies;
06aebfb7 2125 spin_unlock_bh(&ifp->lock);
0778769d 2126
46d48046 2127 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2128 expires, flags);
95c385b4
NH		 2129 /*
2130 * Note that section 3.1 of RFC 4429 indicates
2131 * that the Optimistic flag should not be set for
2132 * manually configured addresses
2133 */
1da177e4
LT		 2134 addrconf_dad_start(ifp, 0);
2135 in6_ifa_put(ifp);
0778769d 2136 addrconf_verify(0);
1da177e4
LT		 2137 return 0;
2138 }
2139
2140 return PTR_ERR(ifp);
2141}
2142
af284937 2143static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2144 unsigned int plen)
1da177e4
LT		 2145{
2146 struct inet6_ifaddr *ifp;
2147 struct inet6_dev *idev;
2148 struct net_device *dev;
1ab1457c 2149
24ef0da7
TG		 2150 if (plen > 128)
2151 return -EINVAL;
2152
af284937
DL		 2153 dev = __dev_get_by_index(net, ifindex);
2154 if (!dev)
1da177e4
LT		 2155 return -ENODEV;
2156
2157 if ((idev = __in6_dev_get(dev)) == NULL)
2158 return -ENXIO;
2159
2160 read_lock_bh(&idev->lock);
2161 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2162 if (ifp->prefix_len == plen &&
2163 ipv6_addr_equal(pfx, &ifp->addr)) {
2164 in6_ifa_hold(ifp);
2165 read_unlock_bh(&idev->lock);
1ab1457c 2166
1da177e4
LT		 2167 ipv6_del_addr(ifp);
2168
2169 /* If the last address is deleted administratively,
2170 disable IPv6 on this interface.
2171 */
2172 if (idev->addr_list == NULL)
2173 addrconf_ifdown(idev->dev, 1);
2174 return 0;
2175 }
2176 }
2177 read_unlock_bh(&idev->lock);
2178 return -EADDRNOTAVAIL;
2179}
2180
2181
af284937 2182int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2183{
2184 struct in6_ifreq ireq;
2185 int err;
1ab1457c 2186
1da177e4
LT		 2187 if (!capable(CAP_NET_ADMIN))
2188 return -EPERM;
1ab1457c 2189
1da177e4
LT		 2190 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2191 return -EFAULT;
2192
2193 rtnl_lock();
af284937
DL		 2194 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2195 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2196 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2197 rtnl_unlock();
2198 return err;
2199}
2200
af284937 2201int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2202{
2203 struct in6_ifreq ireq;
2204 int err;
1ab1457c 2205
1da177e4
LT		 2206 if (!capable(CAP_NET_ADMIN))
2207 return -EPERM;
2208
2209 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2210 return -EFAULT;
2211
2212 rtnl_lock();
af284937
DL		 2213 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2214 ireq.ifr6_prefixlen);
1da177e4
LT		 2215 rtnl_unlock();
2216 return err;
2217}
2218
0be669bb 2219#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2220static void sit_add_v4_addrs(struct inet6_dev *idev)
2221{
2222 struct inet6_ifaddr * ifp;
2223 struct in6_addr addr;
2224 struct net_device *dev;
c346dca1 2225 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2226 int scope;
2227
2228 ASSERT_RTNL();
2229
2230 memset(&addr, 0, sizeof(struct in6_addr));
2231 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2232
2233 if (idev->dev->flags&IFF_POINTOPOINT) {
2234 addr.s6_addr32[0] = htonl(0xfe800000);
2235 scope = IFA_LINK;
2236 } else {
2237 scope = IPV6_ADDR_COMPATv4;
2238 }
2239
2240 if (addr.s6_addr32[3]) {
2241 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2242 if (!IS_ERR(ifp)) {
2243 spin_lock_bh(&ifp->lock);
2244 ifp->flags &= ~IFA_F_TENTATIVE;
2245 spin_unlock_bh(&ifp->lock);
2246 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2247 in6_ifa_put(ifp);
2248 }
2249 return;
2250 }
2251
6fda7350 2252 for_each_netdev(net, dev) {
e5ed6399 2253 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2254 if (in_dev && (dev->flags & IFF_UP)) {
2255 struct in_ifaddr * ifa;
2256
2257 int flag = scope;
2258
2259 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2260 int plen;
2261
2262 addr.s6_addr32[3] = ifa->ifa_local;
2263
2264 if (ifa->ifa_scope == RT_SCOPE_LINK)
2265 continue;
2266 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2267 if (idev->dev->flags&IFF_POINTOPOINT)
2268 continue;
2269 flag |= IFA_HOST;
2270 }
2271 if (idev->dev->flags&IFF_POINTOPOINT)
2272 plen = 64;
2273 else
2274 plen = 96;
2275
2276 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2277 IFA_F_PERMANENT);
2278 if (!IS_ERR(ifp)) {
2279 spin_lock_bh(&ifp->lock);
2280 ifp->flags &= ~IFA_F_TENTATIVE;
2281 spin_unlock_bh(&ifp->lock);
2282 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2283 in6_ifa_put(ifp);
2284 }
2285 }
2286 }
1ab1457c 2287 }
1da177e4 2288}
0be669bb 2289#endif
1da177e4
LT		 2290
2291static void init_loopback(struct net_device *dev)
2292{
2293 struct inet6_dev *idev;
2294 struct inet6_ifaddr * ifp;
2295
2296 /* ::1 */
2297
2298 ASSERT_RTNL();
2299
2300 if ((idev = ipv6_find_idev(dev)) == NULL) {
2301 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2302 return;
2303 }
2304
2305 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2306 if (!IS_ERR(ifp)) {
2307 spin_lock_bh(&ifp->lock);
2308 ifp->flags &= ~IFA_F_TENTATIVE;
2309 spin_unlock_bh(&ifp->lock);
2310 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2311 in6_ifa_put(ifp);
2312 }
2313}
2314
2315static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2316{
2317 struct inet6_ifaddr * ifp;
95c385b4
NH		 2318 u32 addr_flags = IFA_F_PERMANENT;
2319
2320#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2321 if (idev->cnf.optimistic_dad &&
2322 !ipv6_devconf.forwarding)
2323 addr_flags |= IFA_F_OPTIMISTIC;
2324#endif
1da177e4 2325
95c385b4
NH		 2326
2327 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2328 if (!IS_ERR(ifp)) {
46d48046 2329 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2330 addrconf_dad_start(ifp, 0);
2331 in6_ifa_put(ifp);
2332 }
2333}
2334
2335static void addrconf_dev_config(struct net_device *dev)
2336{
2337 struct in6_addr addr;
2338 struct inet6_dev * idev;
2339
2340 ASSERT_RTNL();
2341
74235a25
HX		 2342 if ((dev->type != ARPHRD_ETHER) &&
2343 (dev->type != ARPHRD_FDDI) &&
2344 (dev->type != ARPHRD_IEEE802_TR) &&
2345 (dev->type != ARPHRD_ARCNET) &&
2346 (dev->type != ARPHRD_INFINIBAND)) {
2347 /* Alas, we support only Ethernet autoconfiguration. */
2348 return;
2349 }
2350
1da177e4
LT		 2351 idev = addrconf_add_dev(dev);
2352 if (idev == NULL)
2353 return;
2354
2355 memset(&addr, 0, sizeof(struct in6_addr));
2356 addr.s6_addr32[0] = htonl(0xFE800000);
2357
2358 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2359 addrconf_add_linklocal(idev, &addr);
2360}
2361
0be669bb 2362#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2363static void addrconf_sit_config(struct net_device *dev)
2364{
2365 struct inet6_dev *idev;
2366
2367 ASSERT_RTNL();
2368
1ab1457c
YH		 2369 /*
2370 * Configure the tunnel with one of our IPv4
2371 * addresses... we should configure all of
1da177e4
LT		 2372 * our v4 addrs in the tunnel
2373 */
2374
2375 if ((idev = ipv6_find_idev(dev)) == NULL) {
2376 printk(KERN_DEBUG "init sit: add_dev failed\n");
2377 return;
2378 }
2379
c7dc89c0
FT		 2380 if (dev->priv_flags & IFF_ISATAP) {
2381 struct in6_addr addr;
2382
2383 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2384 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2385 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2386 addrconf_add_linklocal(idev, &addr);
2387 return;
2388 }
2389
1da177e4
LT		 2390 sit_add_v4_addrs(idev);
2391
2392 if (dev->flags&IFF_POINTOPOINT) {
2393 addrconf_add_mroute(dev);
2394 addrconf_add_lroute(dev);
2395 } else
2396 sit_route_add(dev);
2397}
0be669bb 2398#endif
1da177e4
LT		 2399
2400static inline int
2401ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2402{
2403 struct in6_addr lladdr;
2404
95c385b4 2405 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2406 addrconf_add_linklocal(idev, &lladdr);
2407 return 0;
2408 }
2409 return -1;
2410}
2411
2412static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2413{
2414 struct net_device *link_dev;
c346dca1 2415 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2416
2417 /* first try to inherit the link-local address from the link device */
2418 if (idev->dev->iflink &&
6fda7350 2419 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2420 if (!ipv6_inherit_linklocal(idev, link_dev))
2421 return;
2422 }
2423 /* then try to inherit it from any device */
6fda7350 2424 for_each_netdev(net, link_dev) {
1da177e4
LT		 2425 if (!ipv6_inherit_linklocal(idev, link_dev))
2426 return;
2427 }
2428 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2429}
2430
2431/*
2432 * Autoconfigure tunnel with a link-local address so routing protocols,
2433 * DHCPv6, MLD etc. can be run over the virtual link
2434 */
2435
2436static void addrconf_ip6_tnl_config(struct net_device *dev)
2437{
2438 struct inet6_dev *idev;
2439
2440 ASSERT_RTNL();
2441
2442 if ((idev = addrconf_add_dev(dev)) == NULL) {
2443 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2444 return;
2445 }
2446 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2447}
2448
1ab1457c 2449static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2450 void * data)
2451{
2452 struct net_device *dev = (struct net_device *) data;
74235a25 2453 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2454 int run_pending = 0;
b217d616 2455 int err;
1da177e4
LT		 2456
2457 switch(event) {
45ba9dd2 2458 case NETDEV_REGISTER:
74235a25 2459 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2460 idev = ipv6_add_dev(dev);
2461 if (!idev)
b217d616 2462 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2463 }
2464 break;
1da177e4 2465 case NETDEV_UP:
3c21edbd 2466 case NETDEV_CHANGE:
c2edacf8
JV		 2467 if (dev->flags & IFF_SLAVE)
2468 break;
2469
3c21edbd 2470 if (event == NETDEV_UP) {
f24e3d65 2471 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2472 /* device is not ready yet. */
2473 printk(KERN_INFO
2474 "ADDRCONF(NETDEV_UP): %s: "
2475 "link is not ready\n",
2476 dev->name);
2477 break;
2478 }
99081049 2479
d31c7b8f
EP		 2480 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2481 idev = ipv6_add_dev(dev);
2482
99081049
KS		 2483 if (idev)
2484 idev->if_flags |= IF_READY;
3c21edbd 2485 } else {
f24e3d65 2486 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2487 /* device is still not ready. */
2488 break;
2489 }
2490
2491 if (idev) {
2492 if (idev->if_flags & IF_READY) {
2493 /* device is already configured. */
2494 break;
2495 }
2496 idev->if_flags |= IF_READY;
2497 }
2498
2499 printk(KERN_INFO
2500 "ADDRCONF(NETDEV_CHANGE): %s: "
2501 "link becomes ready\n",
2502 dev->name);
2503
c5e33bdd 2504 run_pending = 1;
3c21edbd
YH		 2505 }
2506
1da177e4 2507 switch(dev->type) {
0be669bb 2508#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2509 case ARPHRD_SIT:
2510 addrconf_sit_config(dev);
2511 break;
0be669bb 2512#endif
1da177e4
LT		 2513 case ARPHRD_TUNNEL6:
2514 addrconf_ip6_tnl_config(dev);
2515 break;
2516 case ARPHRD_LOOPBACK:
2517 init_loopback(dev);
2518 break;
2519
2520 default:
2521 addrconf_dev_config(dev);
2522 break;
3ff50b79 2523 }
1da177e4 2524 if (idev) {
c5e33bdd
YH		 2525 if (run_pending)
2526 addrconf_dad_run(idev);
2527
1da177e4
LT		 2528 /* If the MTU changed during the interface down, when the
2529 interface up, the changed MTU must be reflected in the
2530 idev as well as routers.
2531 */
2532 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2533 rt6_mtu_change(dev, dev->mtu);
2534 idev->cnf.mtu6 = dev->mtu;
2535 }
2536 idev->tstamp = jiffies;
2537 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2538 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2539 stop IPv6 on this interface.
2540 */
2541 if (dev->mtu < IPV6_MIN_MTU)
2542 addrconf_ifdown(dev, event != NETDEV_DOWN);
2543 }
2544 break;
2545
2546 case NETDEV_CHANGEMTU:
d31c7b8f 2547 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2548 rt6_mtu_change(dev, dev->mtu);
2549 idev->cnf.mtu6 = dev->mtu;
2550 break;
2551 }
2552
d31c7b8f
EP		 2553 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2554 idev = ipv6_add_dev(dev);
2555 if (idev)
2556 break;
2557 }
2558
1da177e4
LT		 2559 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2560
2561 case NETDEV_DOWN:
2562 case NETDEV_UNREGISTER:
2563 /*
2564 * Remove all addresses from this interface.
2565 */
2566 addrconf_ifdown(dev, event != NETDEV_DOWN);
2567 break;
3c21edbd 2568
1da177e4 2569 case NETDEV_CHANGENAME:
1da177e4 2570 if (idev) {
5632c515 2571 snmp6_unregister_dev(idev);
408c4768 2572 addrconf_sysctl_unregister(idev);
f52295a9 2573 addrconf_sysctl_register(idev);
b217d616
HX		 2574 err = snmp6_register_dev(idev);
2575 if (err)
2576 return notifier_from_errno(err);
5632c515 2577 }
1da177e4 2578 break;
3ff50b79 2579 }
1da177e4
LT		 2580
2581 return NOTIFY_OK;
2582}
2583
2584/*
2585 * addrconf module should be notified of a device going up
2586 */
2587static struct notifier_block ipv6_dev_notf = {
2588 .notifier_call = addrconf_notify,
2589 .priority = 0
2590};
2591
2592static int addrconf_ifdown(struct net_device *dev, int how)
2593{
2594 struct inet6_dev *idev;
2595 struct inet6_ifaddr *ifa, **bifa;
c346dca1 2596 struct net *net = dev_net(dev);
1da177e4
LT		 2597 int i;
2598
2599 ASSERT_RTNL();
2600
eb867579 2601 if ((dev->flags & IFF_LOOPBACK) && how == 1)
1da177e4
LT		 2602 how = 0;
2603
f3db4851 2604 rt6_ifdown(net, dev);
1da177e4
LT		 2605 neigh_ifdown(&nd_tbl, dev);
2606
2607 idev = __in6_dev_get(dev);
2608 if (idev == NULL)
2609 return -ENODEV;
2610
2611 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2612 Do not dev_put!
1da177e4 2613 */
439e2385 2614 if (how) {
1da177e4 2615 idev->dead = 1;
8814c4b5
YH		 2616
2617 /* protected by rtnl_lock */
2618 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2619
2620 /* Step 1.5: remove snmp6 entry */
2621 snmp6_unregister_dev(idev);
2622
2623 }
2624
2625 /* Step 2: clear hash table */
2626 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2627 bifa = &inet6_addr_lst[i];
2628
2629 write_lock_bh(&addrconf_hash_lock);
2630 while ((ifa = *bifa) != NULL) {
2631 if (ifa->idev == idev) {
2632 *bifa = ifa->lst_next;
2633 ifa->lst_next = NULL;
2634 addrconf_del_timer(ifa);
2635 in6_ifa_put(ifa);
2636 continue;
2637 }
2638 bifa = &ifa->lst_next;
2639 }
2640 write_unlock_bh(&addrconf_hash_lock);
2641 }
2642
2643 write_lock_bh(&idev->lock);
2644
2645 /* Step 3: clear flags for stateless addrconf */
439e2385 2646 if (!how)
3c21edbd 2647 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2648
2649 /* Step 4: clear address list */
2650#ifdef CONFIG_IPV6_PRIVACY
439e2385 2651 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2652 in6_dev_put(idev);
2653
2654 /* clear tempaddr list */
2655 while ((ifa = idev->tempaddr_list) != NULL) {
2656 idev->tempaddr_list = ifa->tmp_next;
2657 ifa->tmp_next = NULL;
2658 ifa->dead = 1;
2659 write_unlock_bh(&idev->lock);
2660 spin_lock_bh(&ifa->lock);
2661
2662 if (ifa->ifpub) {
2663 in6_ifa_put(ifa->ifpub);
2664 ifa->ifpub = NULL;
2665 }
2666 spin_unlock_bh(&ifa->lock);
2667 in6_ifa_put(ifa);
2668 write_lock_bh(&idev->lock);
2669 }
2670#endif
2671 while ((ifa = idev->addr_list) != NULL) {
2672 idev->addr_list = ifa->if_next;
2673 ifa->if_next = NULL;
2674 ifa->dead = 1;
2675 addrconf_del_timer(ifa);
2676 write_unlock_bh(&idev->lock);
2677
2678 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2679 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2680 in6_ifa_put(ifa);
2681
2682 write_lock_bh(&idev->lock);
2683 }
2684 write_unlock_bh(&idev->lock);
2685
2686 /* Step 5: Discard multicast list */
2687
439e2385 2688 if (how)
1da177e4
LT		 2689 ipv6_mc_destroy_dev(idev);
2690 else
2691 ipv6_mc_down(idev);
2692
1da177e4 2693 idev->tstamp = jiffies;
1ab1457c 2694
1da177e4
LT		 2695 /* Shot the device (if unregistered) */
2696
439e2385 2697 if (how) {
408c4768 2698 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2699 neigh_parms_release(&nd_tbl, idev->nd_parms);
2700 neigh_ifdown(&nd_tbl, dev);
2701 in6_dev_put(idev);
2702 }
2703 return 0;
2704}
2705
2706static void addrconf_rs_timer(unsigned long data)
2707{
2708 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2709
2710 if (ifp->idev->cnf.forwarding)
2711 goto out;
2712
2713 if (ifp->idev->if_flags & IF_RA_RCVD) {
2714 /*
2715 * Announcement received after solicitation
2716 * was sent
2717 */
2718 goto out;
2719 }
2720
2721 spin_lock(&ifp->lock);
2722 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
1da177e4
LT		 2723 /* The wait after the last probe can be shorter */
2724 addrconf_mod_timer(ifp, AC_RS,
2725 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2726 ifp->idev->cnf.rtr_solicit_delay :
2727 ifp->idev->cnf.rtr_solicit_interval);
2728 spin_unlock(&ifp->lock);
2729
f3ee4010 2730 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2731 } else {
2732 spin_unlock(&ifp->lock);
2733 /*
2734 * Note: we do not support deprecated "all on-link"
2735 * assumption any longer.
2736 */
2737 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2738 ifp->idev->dev->name);
2739 }
2740
2741out:
2742 in6_ifa_put(ifp);
2743}
2744
2745/*
2746 * Duplicate Address Detection
2747 */
3c21edbd
YH		 2748static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2749{
2750 unsigned long rand_num;
2751 struct inet6_dev *idev = ifp->idev;
2752
95c385b4
NH		 2753 if (ifp->flags & IFA_F_OPTIMISTIC)
2754 rand_num = 0;
2755 else
2756 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2757
3c21edbd
YH		 2758 ifp->probes = idev->cnf.dad_transmits;
2759 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2760}
2761
e431b8c0 2762static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2763{
2764 struct inet6_dev *idev = ifp->idev;
2765 struct net_device *dev = idev->dev;
1da177e4
LT		 2766
2767 addrconf_join_solict(dev, &ifp->addr);
2768
1da177e4 2769 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2770
2771 read_lock_bh(&idev->lock);
2772 if (ifp->dead)
2773 goto out;
2774 spin_lock_bh(&ifp->lock);
2775
2776 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2777 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2778 !(ifp->flags&IFA_F_TENTATIVE) ||
2779 ifp->flags & IFA_F_NODAD) {
95c385b4 2780 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2781 spin_unlock_bh(&ifp->lock);
2782 read_unlock_bh(&idev->lock);
2783
2784 addrconf_dad_completed(ifp);
2785 return;
2786 }
2787
6732bade 2788 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2789 spin_unlock_bh(&ifp->lock);
6732bade 2790 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2791 /*
2792 * If the defice is not ready:
2793 * - keep it tentative if it is a permanent address.
2794 * - otherwise, kill it.
2795 */
2796 in6_ifa_hold(ifp);
2797 addrconf_dad_stop(ifp);
6732bade 2798 return;
3c21edbd 2799 }
95c385b4
NH		 2800
2801 /*
2802 * Optimistic nodes can start receiving
2803 * Frames right away
2804 */
2805 if(ifp->flags & IFA_F_OPTIMISTIC)
2806 ip6_ins_rt(ifp->rt);
2807
6732bade
YH		 2808 addrconf_dad_kick(ifp);
2809 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2810out:
2811 read_unlock_bh(&idev->lock);
2812}
2813
2814static void addrconf_dad_timer(unsigned long data)
2815{
2816 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2817 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2818 struct in6_addr mcaddr;
2819
2820 read_lock_bh(&idev->lock);
2821 if (idev->dead) {
2822 read_unlock_bh(&idev->lock);
2823 goto out;
2824 }
1b34be74
YH		 2825 if (idev->cnf.accept_dad > 1 && idev->cnf.disable_ipv6) {
2826 read_unlock_bh(&idev->lock);
2827 addrconf_dad_failure(ifp);
2828 return;
2829 }
1da177e4
LT		 2830 spin_lock_bh(&ifp->lock);
2831 if (ifp->probes == 0) {
2832 /*
2833 * DAD was successful
2834 */
2835
95c385b4 2836 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2837 spin_unlock_bh(&ifp->lock);
2838 read_unlock_bh(&idev->lock);
2839
2840 addrconf_dad_completed(ifp);
2841
2842 goto out;
2843 }
2844
2845 ifp->probes--;
2846 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2847 spin_unlock_bh(&ifp->lock);
2848 read_unlock_bh(&idev->lock);
2849
2850 /* send a neighbour solicitation for our addr */
1da177e4 2851 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 2852 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 2853out:
2854 in6_ifa_put(ifp);
2855}
2856
2857static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2858{
2859 struct net_device * dev = ifp->idev->dev;
2860
2861 /*
2862 * Configure the address for reception. Now it is valid.
2863 */
2864
2865 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2866
2867 /* If added prefix is link local and forwarding is off,
2868 start sending router solicitations.
2869 */
2870
2871 if (ifp->idev->cnf.forwarding == 0 &&
2872 ifp->idev->cnf.rtr_solicits > 0 &&
2873 (dev->flags&IFF_LOOPBACK) == 0 &&
2874 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2875 /*
2876 * If a host as already performed a random delay
2877 * [...] as part of DAD [...] there is no need
2878 * to delay again before sending the first RS
2879 */
f3ee4010 2880 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2881
2882 spin_lock_bh(&ifp->lock);
2883 ifp->probes = 1;
2884 ifp->idev->if_flags |= IF_RS_SENT;
2885 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2886 spin_unlock_bh(&ifp->lock);
2887 }
2888}
2889
c5e33bdd
YH		 2890static void addrconf_dad_run(struct inet6_dev *idev) {
2891 struct inet6_ifaddr *ifp;
2892
2893 read_lock_bh(&idev->lock);
2894 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2895 spin_lock_bh(&ifp->lock);
2896 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2897 spin_unlock_bh(&ifp->lock);
2898 continue;
2899 }
2900 spin_unlock_bh(&ifp->lock);
2901 addrconf_dad_kick(ifp);
2902 }
2903 read_unlock_bh(&idev->lock);
2904}
2905
1da177e4
LT		 2906#ifdef CONFIG_PROC_FS
2907struct if6_iter_state {
3c40090a 2908 struct seq_net_private p;
1da177e4
LT		 2909 int bucket;
2910};
2911
2912static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2913{
2914 struct inet6_ifaddr *ifa = NULL;
2915 struct if6_iter_state *state = seq->private;
1218854a 2916 struct net *net = seq_file_net(seq);
1da177e4
LT		 2917
2918 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2919 ifa = inet6_addr_lst[state->bucket];
3c40090a 2920
878628fb 2921 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
3c40090a 2922 ifa = ifa->lst_next;
1da177e4
LT		 2923 if (ifa)
2924 break;
2925 }
2926 return ifa;
2927}
2928
2929static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2930{
2931 struct if6_iter_state *state = seq->private;
1218854a 2932 struct net *net = seq_file_net(seq);
1da177e4
LT		 2933
2934 ifa = ifa->lst_next;
2935try_again:
3c40090a 2936 if (ifa) {
878628fb 2937 if (!net_eq(dev_net(ifa->idev->dev), net)) {
3c40090a
DL		 2938 ifa = ifa->lst_next;
2939 goto try_again;
2940 }
2941 }
2942
1da177e4
LT		 2943 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2944 ifa = inet6_addr_lst[state->bucket];
2945 goto try_again;
2946 }
3c40090a 2947
1da177e4
LT		 2948 return ifa;
2949}
2950
2951static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2952{
2953 struct inet6_ifaddr *ifa = if6_get_first(seq);
2954
2955 if (ifa)
2956 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2957 --pos;
2958 return pos ? NULL : ifa;
2959}
2960
2961static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
d20b3109 2962 __acquires(addrconf_hash_lock)
1da177e4
LT		 2963{
2964 read_lock_bh(&addrconf_hash_lock);
2965 return if6_get_idx(seq, *pos);
2966}
2967
2968static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2969{
2970 struct inet6_ifaddr *ifa;
2971
2972 ifa = if6_get_next(seq, v);
2973 ++*pos;
2974 return ifa;
2975}
2976
2977static void if6_seq_stop(struct seq_file *seq, void *v)
d20b3109 2978 __releases(addrconf_hash_lock)
1da177e4
LT		 2979{
2980 read_unlock_bh(&addrconf_hash_lock);
2981}
2982
2983static int if6_seq_show(struct seq_file *seq, void *v)
2984{
2985 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2986 seq_printf(seq,
9343e79a 2987 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2988 NIP6(ifp->addr),
2989 ifp->idev->dev->ifindex,
2990 ifp->prefix_len,
2991 ifp->scope,
2992 ifp->flags,
2993 ifp->idev->dev->name);
2994 return 0;
2995}
2996
56b3d975 2997static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2998 .start = if6_seq_start,
2999 .next = if6_seq_next,
3000 .show = if6_seq_show,
3001 .stop = if6_seq_stop,
3002};
3003
3004static int if6_seq_open(struct inode *inode, struct file *file)
3005{
3c40090a
DL		 3006 return seq_open_net(inode, file, &if6_seq_ops,
3007 sizeof(struct if6_iter_state));
1da177e4
LT		 3008}
3009
9a32144e 3010static const struct file_operations if6_fops = {
1da177e4
LT		 3011 .owner = THIS_MODULE,
3012 .open = if6_seq_open,
3013 .read = seq_read,
3014 .llseek = seq_lseek,
3c40090a 3015 .release = seq_release_net,
1da177e4
LT		 3016};
3017
3c40090a 3018static int if6_proc_net_init(struct net *net)
1da177e4 3019{
3c40090a 3020 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 3021 return -ENOMEM;
3022 return 0;
3023}
3024
3c40090a
DL		 3025static void if6_proc_net_exit(struct net *net)
3026{
3027 proc_net_remove(net, "if_inet6");
3028}
3029
3030static struct pernet_operations if6_proc_net_ops = {
3031 .init = if6_proc_net_init,
3032 .exit = if6_proc_net_exit,
3033};
3034
3035int __init if6_proc_init(void)
3036{
3037 return register_pernet_subsys(&if6_proc_net_ops);
3038}
3039
1da177e4
LT		 3040void if6_proc_exit(void)
3041{
3c40090a 3042 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3043}
3044#endif /* CONFIG_PROC_FS */
3045
59fbb3a6 3046#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3047/* Check if address is a home address configured on any interface. */
389f6612 3048int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 3049{
3050 int ret = 0;
3051 struct inet6_ifaddr * ifp;
3052 u8 hash = ipv6_addr_hash(addr);
3053 read_lock_bh(&addrconf_hash_lock);
3054 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
878628fb 3055 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3056 continue;
caad295f 3057 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3058 (ifp->flags & IFA_F_HOMEADDRESS)) {
3059 ret = 1;
3060 break;
3061 }
3062 }
3063 read_unlock_bh(&addrconf_hash_lock);
3064 return ret;
3065}
3066#endif
3067
1da177e4
LT		 3068/*
3069 * Periodic address status verification
3070 */
3071
3072static void addrconf_verify(unsigned long foo)
3073{
3074 struct inet6_ifaddr *ifp;
3075 unsigned long now, next;
3076 int i;
3077
3078 spin_lock_bh(&addrconf_verify_lock);
3079 now = jiffies;
3080 next = now + ADDR_CHECK_FREQUENCY;
3081
3082 del_timer(&addr_chk_timer);
3083
3084 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3085
3086restart:
5d5780df 3087 read_lock(&addrconf_hash_lock);
1da177e4
LT		 3088 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3089 unsigned long age;
3090#ifdef CONFIG_IPV6_PRIVACY
3091 unsigned long regen_advance;
3092#endif
3093
3094 if (ifp->flags & IFA_F_PERMANENT)
3095 continue;
3096
3097 spin_lock(&ifp->lock);
3098 age = (now - ifp->tstamp) / HZ;
3099
3100#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 3101 regen_advance = ifp->idev->cnf.regen_max_retry *
3102 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 3103 ifp->idev->nd_parms->retrans_time / HZ;
3104#endif
3105
8f27ebb9
YH		 3106 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3107 age >= ifp->valid_lft) {
1da177e4
LT		 3108 spin_unlock(&ifp->lock);
3109 in6_ifa_hold(ifp);
5d5780df 3110 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3111 ipv6_del_addr(ifp);
3112 goto restart;
8f27ebb9
YH		 3113 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3114 spin_unlock(&ifp->lock);
3115 continue;
1da177e4
LT		 3116 } else if (age >= ifp->prefered_lft) {
3117 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
3118 int deprecate = 0;
3119
3120 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3121 deprecate = 1;
3122 ifp->flags |= IFA_F_DEPRECATED;
3123 }
3124
3125 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3126 next = ifp->tstamp + ifp->valid_lft * HZ;
3127
3128 spin_unlock(&ifp->lock);
3129
3130 if (deprecate) {
3131 in6_ifa_hold(ifp);
5d5780df 3132 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3133
3134 ipv6_ifa_notify(0, ifp);
3135 in6_ifa_put(ifp);
3136 goto restart;
3137 }
3138#ifdef CONFIG_IPV6_PRIVACY
3139 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3140 !(ifp->flags&IFA_F_TENTATIVE)) {
3141 if (age >= ifp->prefered_lft - regen_advance) {
3142 struct inet6_ifaddr *ifpub = ifp->ifpub;
3143 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3144 next = ifp->tstamp + ifp->prefered_lft * HZ;
3145 if (!ifp->regen_count && ifpub) {
3146 ifp->regen_count++;
3147 in6_ifa_hold(ifp);
3148 in6_ifa_hold(ifpub);
3149 spin_unlock(&ifp->lock);
5d5780df 3150 read_unlock(&addrconf_hash_lock);
291d809b
HY		 3151 spin_lock(&ifpub->lock);
3152 ifpub->regen_count = 0;
3153 spin_unlock(&ifpub->lock);
1da177e4
LT		 3154 ipv6_create_tempaddr(ifpub, ifp);
3155 in6_ifa_put(ifpub);
3156 in6_ifa_put(ifp);
3157 goto restart;
3158 }
3159 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3160 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3161 spin_unlock(&ifp->lock);
3162#endif
3163 } else {
3164 /* ifp->prefered_lft <= ifp->valid_lft */
3165 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3166 next = ifp->tstamp + ifp->prefered_lft * HZ;
3167 spin_unlock(&ifp->lock);
3168 }
3169 }
5d5780df 3170 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3171 }
3172
3173 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3174 add_timer(&addr_chk_timer);
3175 spin_unlock_bh(&addrconf_verify_lock);
3176}
3177
461d8837
TG		 3178static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3179{
3180 struct in6_addr *pfx = NULL;
3181
3182 if (addr)
3183 pfx = nla_data(addr);
3184
3185 if (local) {
3186 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3187 pfx = NULL;
3188 else
3189 pfx = nla_data(local);
3190 }
3191
3192 return pfx;
3193}
3194
ef7c79ed 3195static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3196 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3197 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3198 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3199};
3200
1da177e4
LT		 3201static int
3202inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3203{
3b1e0a65 3204 struct net *net = sock_net(skb->sk);
b933f716
TG		 3205 struct ifaddrmsg *ifm;
3206 struct nlattr *tb[IFA_MAX+1];
1da177e4 3207 struct in6_addr *pfx;
b933f716 3208 int err;
1da177e4 3209
b933f716
TG		 3210 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3211 if (err < 0)
3212 return err;
3213
3214 ifm = nlmsg_data(nlh);
3215 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3216 if (pfx == NULL)
3217 return -EINVAL;
3218
af284937 3219 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3220}
3221
55ebaef1
NT		 3222static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3223 u32 prefered_lft, u32 valid_lft)
081bba5b 3224{
6f704992
YH		 3225 u32 flags;
3226 clock_t expires;
4bed72e4 3227 unsigned long timeout;
46d48046 3228
081bba5b
NT		 3229 if (!valid_lft || (prefered_lft > valid_lft))
3230 return -EINVAL;
3231
4bed72e4
YH		 3232 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3233 if (addrconf_finite_timeout(timeout)) {
3234 expires = jiffies_to_clock_t(timeout * HZ);
3235 valid_lft = timeout;
6f704992 3236 flags = RTF_EXPIRES;
4bed72e4
YH		 3237 } else {
3238 expires = 0;
3239 flags = 0;
3240 ifa_flags |= IFA_F_PERMANENT;
6f704992 3241 }
081bba5b 3242
4bed72e4
YH		 3243 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3244 if (addrconf_finite_timeout(timeout)) {
3245 if (timeout == 0)
3246 ifa_flags |= IFA_F_DEPRECATED;
3247 prefered_lft = timeout;
3248 }
081bba5b
NT		 3249
3250 spin_lock_bh(&ifp->lock);
3b9f9a1c 3251 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3252 ifp->tstamp = jiffies;
3253 ifp->valid_lft = valid_lft;
3254 ifp->prefered_lft = prefered_lft;
3255
3256 spin_unlock_bh(&ifp->lock);
3257 if (!(ifp->flags&IFA_F_TENTATIVE))
3258 ipv6_ifa_notify(0, ifp);
081bba5b 3259
46d48046 3260 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3261 expires, flags);
081bba5b
NT		 3262 addrconf_verify(0);
3263
3264 return 0;
3265}
3266
1da177e4
LT		 3267static int
3268inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3269{
3b1e0a65 3270 struct net *net = sock_net(skb->sk);
461d8837
TG		 3271 struct ifaddrmsg *ifm;
3272 struct nlattr *tb[IFA_MAX+1];
1da177e4 3273 struct in6_addr *pfx;
7198f8ce
TG		 3274 struct inet6_ifaddr *ifa;
3275 struct net_device *dev;
55ebaef1
NT		 3276 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3277 u8 ifa_flags;
461d8837 3278 int err;
1da177e4 3279
461d8837
TG		 3280 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3281 if (err < 0)
3282 return err;
3283
3284 ifm = nlmsg_data(nlh);
3285 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3286 if (pfx == NULL)
3287 return -EINVAL;
3288
461d8837 3289 if (tb[IFA_CACHEINFO]) {
0778769d 3290 struct ifa_cacheinfo *ci;
461d8837
TG		 3291
3292 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3293 valid_lft = ci->ifa_valid;
461d8837
TG		 3294 preferred_lft = ci->ifa_prefered;
3295 } else {
3296 preferred_lft = INFINITY_LIFE_TIME;
3297 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3298 }
3299
af284937 3300 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3301 if (dev == NULL)
3302 return -ENODEV;
3303
55ebaef1 3304 /* We ignore other flags so far. */
3b9f9a1c 3305 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3306
1cab3da6 3307 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3308 if (ifa == NULL) {
3309 /*
3310 * It would be best to check for !NLM_F_CREATE here but
3311 * userspace alreay relies on not having to provide this.
3312 */
af284937
DL		 3313 return inet6_addr_add(net, ifm->ifa_index, pfx,
3314 ifm->ifa_prefixlen, ifa_flags,
3315 preferred_lft, valid_lft);
081bba5b
NT		 3316 }
3317
7198f8ce
TG		 3318 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3319 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3320 err = -EEXIST;
3321 else
55ebaef1 3322 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3323
3324 in6_ifa_put(ifa);
3325
3326 return err;
1da177e4
LT		 3327}
3328
101bb229
TG		 3329static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3330 u8 scope, int ifindex)
3331{
3332 struct ifaddrmsg *ifm;
3333
3334 ifm = nlmsg_data(nlh);
3335 ifm->ifa_family = AF_INET6;
3336 ifm->ifa_prefixlen = prefixlen;
3337 ifm->ifa_flags = flags;
3338 ifm->ifa_scope = scope;
3339 ifm->ifa_index = ifindex;
3340}
3341
85486af0
TG		 3342static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3343 unsigned long tstamp, u32 preferred, u32 valid)
3344{
3345 struct ifa_cacheinfo ci;
3346
3347 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3348 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3349 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3350 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3351 ci.ifa_prefered = preferred;
3352 ci.ifa_valid = valid;
3353
3354 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3355}
3356
101bb229
TG		 3357static inline int rt_scope(int ifa_scope)
3358{
3359 if (ifa_scope & IFA_HOST)
3360 return RT_SCOPE_HOST;
3361 else if (ifa_scope & IFA_LINK)
3362 return RT_SCOPE_LINK;
3363 else if (ifa_scope & IFA_SITE)
3364 return RT_SCOPE_SITE;
3365 else
3366 return RT_SCOPE_UNIVERSE;
3367}
3368
0ab6803b
TG		 3369static inline int inet6_ifaddr_msgsize(void)
3370{
339bf98f
TG		 3371 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3372 + nla_total_size(16) /* IFA_ADDRESS */
3373 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3374}
c5396a31 3375
1da177e4 3376static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3377 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3378{
1da177e4 3379 struct nlmsghdr *nlh;
85486af0 3380 u32 preferred, valid;
1da177e4 3381
0ab6803b
TG		 3382 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3383 if (nlh == NULL)
26932566 3384 return -EMSGSIZE;
0ab6803b 3385
101bb229
TG		 3386 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3387 ifa->idev->dev->ifindex);
3388
1da177e4 3389 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3390 preferred = ifa->prefered_lft;
3391 valid = ifa->valid_lft;
3392 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3393 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3394 preferred -= tval;
3395 if (valid != INFINITY_LIFE_TIME)
3396 valid -= tval;
1da177e4
LT		 3397 }
3398 } else {
85486af0
TG		 3399 preferred = INFINITY_LIFE_TIME;
3400 valid = INFINITY_LIFE_TIME;
3401 }
3402
0ab6803b 3403 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3404 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3405 nlmsg_cancel(skb, nlh);
3406 return -EMSGSIZE;
3407 }
1da177e4 3408
0ab6803b 3409 return nlmsg_end(skb, nlh);
1da177e4
LT		 3410}
3411
3412static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3413 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3414{
1da177e4 3415 struct nlmsghdr *nlh;
101bb229
TG		 3416 u8 scope = RT_SCOPE_UNIVERSE;
3417 int ifindex = ifmca->idev->dev->ifindex;
3418
3419 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3420 scope = RT_SCOPE_SITE;
1da177e4 3421
0ab6803b
TG		 3422 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3423 if (nlh == NULL)
26932566 3424 return -EMSGSIZE;
85486af0 3425
0ab6803b
TG		 3426 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3427 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3428 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3429 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3430 nlmsg_cancel(skb, nlh);
3431 return -EMSGSIZE;
3432 }
85486af0 3433
0ab6803b 3434 return nlmsg_end(skb, nlh);
1da177e4
LT		 3435}
3436
3437static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3438 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3439{
1da177e4 3440 struct nlmsghdr *nlh;
101bb229
TG		 3441 u8 scope = RT_SCOPE_UNIVERSE;
3442 int ifindex = ifaca->aca_idev->dev->ifindex;
3443
3444 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3445 scope = RT_SCOPE_SITE;
1da177e4 3446
0ab6803b
TG		 3447 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3448 if (nlh == NULL)
26932566 3449 return -EMSGSIZE;
85486af0 3450
0ab6803b
TG		 3451 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3452 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3453 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3454 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3455 nlmsg_cancel(skb, nlh);
3456 return -EMSGSIZE;
3457 }
1da177e4 3458
0ab6803b 3459 return nlmsg_end(skb, nlh);
1da177e4
LT		 3460}
3461
3462enum addr_type_t
3463{
3464 UNICAST_ADDR,
3465 MULTICAST_ADDR,
3466 ANYCAST_ADDR,
3467};
3468
3469static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3470 enum addr_type_t type)
3471{
3472 int idx, ip_idx;
3473 int s_idx, s_ip_idx;
3474 int err = 1;
3475 struct net_device *dev;
3476 struct inet6_dev *idev = NULL;
3477 struct inet6_ifaddr *ifa;
3478 struct ifmcaddr6 *ifmca;
3479 struct ifacaddr6 *ifaca;
3b1e0a65 3480 struct net *net = sock_net(skb->sk);
1da177e4
LT		 3481
3482 s_idx = cb->args[0];
3483 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3484
7562f876 3485 idx = 0;
6fda7350 3486 for_each_netdev(net, dev) {
1da177e4 3487 if (idx < s_idx)
7562f876 3488 goto cont;
1da177e4
LT		 3489 if (idx > s_idx)
3490 s_ip_idx = 0;
3491 ip_idx = 0;
3492 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3493 goto cont;
1da177e4
LT		 3494 read_lock_bh(&idev->lock);
3495 switch (type) {
3496 case UNICAST_ADDR:
ae9cda5d 3497 /* unicast address incl. temp addr */
1da177e4
LT		 3498 for (ifa = idev->addr_list; ifa;
3499 ifa = ifa->if_next, ip_idx++) {
3500 if (ip_idx < s_ip_idx)
3501 continue;
5d5619b4
YH		 3502 err = inet6_fill_ifaddr(skb, ifa,
3503 NETLINK_CB(cb->skb).pid,
3504 cb->nlh->nlmsg_seq,
3505 RTM_NEWADDR,
3506 NLM_F_MULTI);
1da177e4 3507 }
1da177e4
LT		 3508 break;
3509 case MULTICAST_ADDR:
3510 /* multicast address */
1ab1457c 3511 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3512 ifmca = ifmca->next, ip_idx++) {
3513 if (ip_idx < s_ip_idx)
3514 continue;
5d5619b4
YH		 3515 err = inet6_fill_ifmcaddr(skb, ifmca,
3516 NETLINK_CB(cb->skb).pid,
3517 cb->nlh->nlmsg_seq,
3518 RTM_GETMULTICAST,
3519 NLM_F_MULTI);
1da177e4
LT		 3520 }
3521 break;
3522 case ANYCAST_ADDR:
3523 /* anycast address */
3524 for (ifaca = idev->ac_list; ifaca;
3525 ifaca = ifaca->aca_next, ip_idx++) {
3526 if (ip_idx < s_ip_idx)
3527 continue;
5d5619b4
YH		 3528 err = inet6_fill_ifacaddr(skb, ifaca,
3529 NETLINK_CB(cb->skb).pid,
3530 cb->nlh->nlmsg_seq,
3531 RTM_GETANYCAST,
3532 NLM_F_MULTI);
1da177e4
LT		 3533 }
3534 break;
3535 default:
3536 break;
3537 }
3538 read_unlock_bh(&idev->lock);
3539 in6_dev_put(idev);
5d5619b4
YH		 3540
3541 if (err <= 0)
3542 break;
7562f876
PE		 3543cont:
3544 idx++;
1da177e4 3545 }
1da177e4
LT		 3546 cb->args[0] = idx;
3547 cb->args[1] = ip_idx;
3548 return skb->len;
3549}
3550
3551static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3552{
3553 enum addr_type_t type = UNICAST_ADDR;
b854272b 3554
1da177e4
LT		 3555 return inet6_dump_addr(skb, cb, type);
3556}
3557
3558static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3559{
3560 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3561
1da177e4
LT		 3562 return inet6_dump_addr(skb, cb, type);
3563}
3564
3565
3566static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3567{
3568 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3569
1da177e4
LT		 3570 return inet6_dump_addr(skb, cb, type);
3571}
3572
1b29fc2c
TG		 3573static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3574 void *arg)
6c223828 3575{
3b1e0a65 3576 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3577 struct ifaddrmsg *ifm;
3578 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3579 struct in6_addr *addr = NULL;
3580 struct net_device *dev = NULL;
3581 struct inet6_ifaddr *ifa;
3582 struct sk_buff *skb;
6c223828
NT		 3583 int err;
3584
1b29fc2c
TG		 3585 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3586 if (err < 0)
3587 goto errout;
3588
3589 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3590 if (addr == NULL) {
3591 err = -EINVAL;
3592 goto errout;
6c223828 3593 }
6c223828 3594
1b29fc2c 3595 ifm = nlmsg_data(nlh);
6c223828 3596 if (ifm->ifa_index)
6fda7350 3597 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3598
1cab3da6 3599 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3600 err = -EADDRNOTAVAIL;
3601 goto errout;
3602 }
6c223828 3603
0ab6803b 3604 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3605 err = -ENOBUFS;
1b29fc2c 3606 goto errout_ifa;
6c223828
NT		 3607 }
3608
6c223828
NT		 3609 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3610 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3611 if (err < 0) {
3612 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3613 WARN_ON(err == -EMSGSIZE);
3614 kfree_skb(skb);
3615 goto errout_ifa;
3616 }
6fda7350 3617 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3618errout_ifa:
6c223828 3619 in6_ifa_put(ifa);
1b29fc2c 3620errout:
6c223828 3621 return err;
6c223828
NT		 3622}
3623
1da177e4
LT		 3624static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3625{
3626 struct sk_buff *skb;
c346dca1 3627 struct net *net = dev_net(ifa->idev->dev);
5d620266 3628 int err = -ENOBUFS;
1da177e4 3629
0ab6803b 3630 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3631 if (skb == NULL)
3632 goto errout;
3633
3634 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3635 if (err < 0) {
3636 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3637 WARN_ON(err == -EMSGSIZE);
3638 kfree_skb(skb);
3639 goto errout;
3640 }
6fda7350 3641 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
5d620266
TG		 3642errout:
3643 if (err < 0)
6fda7350 3644 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3645}
3646
b6f99a21 3647static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3648 __s32 *array, int bytes)
3649{
04561c1f
TG		 3650 BUG_ON(bytes < (DEVCONF_MAX * 4));
3651
1da177e4
LT		 3652 memset(array, 0, bytes);
3653 array[DEVCONF_FORWARDING] = cnf->forwarding;
3654 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3655 array[DEVCONF_MTU6] = cnf->mtu6;
3656 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3657 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3658 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3659 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3660 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3661 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3662 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3663 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3664#ifdef CONFIG_IPV6_PRIVACY
3665 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3666 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3667 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3668 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3669 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3670#endif
3671 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3672 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3673 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3674#ifdef CONFIG_IPV6_ROUTER_PREF
3675 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3676 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3677#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3678 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3679#endif
930d6ff2 3680#endif
fbea49e1 3681 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3682 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3683#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3684 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3685#endif
7bc570c8
YH		 3686#ifdef CONFIG_IPV6_MROUTE
3687 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3688#endif
778d80be 3689 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3690 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
1da177e4
LT		 3691}
3692
339bf98f
TG		 3693static inline size_t inet6_if_nlmsg_size(void)
3694{
3695 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3696 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3697 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3698 + nla_total_size(4) /* IFLA_MTU */
3699 + nla_total_size(4) /* IFLA_LINK */
3700 + nla_total_size( /* IFLA_PROTINFO */
3701 nla_total_size(4) /* IFLA_INET6_FLAGS */
3702 + nla_total_size(sizeof(struct ifla_cacheinfo))
3703 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3704 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3705 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3706 );
3707}
c5396a31 3708
7f7d9a6b
HX		 3709static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3710 int bytes)
3711{
3712 int i;
3713 int pad = bytes - sizeof(u64) * items;
3714 BUG_ON(pad < 0);
3715
3716 /* Use put_unaligned() because stats may not be aligned for u64. */
3717 put_unaligned(items, &stats[0]);
3718 for (i = 1; i < items; i++)
3719 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3720
3721 memset(&stats[items], 0, pad);
3722}
3723
3724static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3725 int bytes)
3726{
3727 switch(attrtype) {
3728 case IFLA_INET6_STATS:
3729 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3730 break;
3731 case IFLA_INET6_ICMP6STATS:
3732 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3733 break;
3734 }
3735}
3736
1ab1457c 3737static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3738 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3739{
04561c1f 3740 struct net_device *dev = idev->dev;
bf99f1bd 3741 struct nlattr *nla;
04561c1f
TG		 3742 struct ifinfomsg *hdr;
3743 struct nlmsghdr *nlh;
3744 void *protoinfo;
3745 struct ifla_cacheinfo ci;
3746
3747 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3748 if (nlh == NULL)
26932566 3749 return -EMSGSIZE;
04561c1f
TG		 3750
3751 hdr = nlmsg_data(nlh);
3752 hdr->ifi_family = AF_INET6;
3753 hdr->__ifi_pad = 0;
3754 hdr->ifi_type = dev->type;
3755 hdr->ifi_index = dev->ifindex;
3756 hdr->ifi_flags = dev_get_flags(dev);
3757 hdr->ifi_change = 0;
3758
3759 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3760
3761 if (dev->addr_len)
04561c1f 3762 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3763
04561c1f 3764 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3765 if (dev->ifindex != dev->iflink)
04561c1f 3766 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3767
04561c1f
TG		 3768 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3769 if (protoinfo == NULL)
3770 goto nla_put_failure;
1da177e4 3771
04561c1f 3772 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3773
1da177e4
LT		 3774 ci.max_reasm_len = IPV6_MAXPLEN;
3775 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3776 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3777 ci.reachable_time = idev->nd_parms->reachable_time;
3778 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3779 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3780
bf99f1bd
YH		 3781 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3782 if (nla == NULL)
04561c1f 3783 goto nla_put_failure;
bf99f1bd 3784 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3785
bf99f1bd
YH		 3786 /* XXX - MC not implemented */
3787
3788 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3789 if (nla == NULL)
3790 goto nla_put_failure;
3791 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3792
3793 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3794 if (nla == NULL)
3795 goto nla_put_failure;
3796 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3797
04561c1f
TG		 3798 nla_nest_end(skb, protoinfo);
3799 return nlmsg_end(skb, nlh);
1da177e4 3800
04561c1f 3801nla_put_failure:
26932566
PM		 3802 nlmsg_cancel(skb, nlh);
3803 return -EMSGSIZE;
1da177e4
LT		 3804}
3805
3806static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3807{
3b1e0a65 3808 struct net *net = sock_net(skb->sk);
1da177e4
LT		 3809 int idx, err;
3810 int s_idx = cb->args[0];
3811 struct net_device *dev;
3812 struct inet6_dev *idev;
3813
3814 read_lock(&dev_base_lock);
7562f876 3815 idx = 0;
6fda7350 3816 for_each_netdev(net, dev) {
1da177e4 3817 if (idx < s_idx)
7562f876 3818 goto cont;
1da177e4 3819 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3820 goto cont;
1ab1457c 3821 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3822 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3823 in6_dev_put(idev);
3824 if (err <= 0)
3825 break;
7562f876
PE		 3826cont:
3827 idx++;
1da177e4
LT		 3828 }
3829 read_unlock(&dev_base_lock);
3830 cb->args[0] = idx;
3831
3832 return skb->len;
3833}
3834
3835void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3836{
3837 struct sk_buff *skb;
c346dca1 3838 struct net *net = dev_net(idev->dev);
8d7a76c9 3839 int err = -ENOBUFS;
1ab1457c 3840
339bf98f 3841 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3842 if (skb == NULL)
3843 goto errout;
3844
3845 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3846 if (err < 0) {
3847 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3848 WARN_ON(err == -EMSGSIZE);
3849 kfree_skb(skb);
3850 goto errout;
3851 }
6fda7350 3852 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
8d7a76c9
TG		 3853errout:
3854 if (err < 0)
6fda7350 3855 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3856}
3857
339bf98f
TG		 3858static inline size_t inet6_prefix_nlmsg_size(void)
3859{
3860 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3861 + nla_total_size(sizeof(struct in6_addr))
3862 + nla_total_size(sizeof(struct prefix_cacheinfo));
3863}
c5396a31 3864
1da177e4 3865static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3866 struct prefix_info *pinfo, u32 pid, u32 seq,
3867 int event, unsigned int flags)
1da177e4 3868{
6051e2f4
TG		 3869 struct prefixmsg *pmsg;
3870 struct nlmsghdr *nlh;
1da177e4
LT		 3871 struct prefix_cacheinfo ci;
3872
6051e2f4
TG		 3873 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3874 if (nlh == NULL)
26932566 3875 return -EMSGSIZE;
6051e2f4
TG		 3876
3877 pmsg = nlmsg_data(nlh);
1da177e4 3878 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3879 pmsg->prefix_pad1 = 0;
3880 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3881 pmsg->prefix_ifindex = idev->dev->ifindex;
3882 pmsg->prefix_len = pinfo->prefix_len;
3883 pmsg->prefix_type = pinfo->type;
8a47077a 3884 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3885 pmsg->prefix_flags = 0;
3886 if (pinfo->onlink)
3887 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3888 if (pinfo->autoconf)
3889 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3890
6051e2f4 3891 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3892
3893 ci.preferred_time = ntohl(pinfo->prefered);
3894 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3895 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3896
6051e2f4 3897 return nlmsg_end(skb, nlh);
1da177e4 3898
6051e2f4 3899nla_put_failure:
26932566
PM		 3900 nlmsg_cancel(skb, nlh);
3901 return -EMSGSIZE;
1da177e4
LT		 3902}
3903
1ab1457c 3904static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3905 struct prefix_info *pinfo)
3906{
3907 struct sk_buff *skb;
c346dca1 3908 struct net *net = dev_net(idev->dev);
8c384bfa 3909 int err = -ENOBUFS;
1da177e4 3910
339bf98f 3911 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3912 if (skb == NULL)
3913 goto errout;
3914
3915 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3916 if (err < 0) {
3917 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3918 WARN_ON(err == -EMSGSIZE);
3919 kfree_skb(skb);
3920 goto errout;
3921 }
6fda7350 3922 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
8c384bfa
TG		 3923errout:
3924 if (err < 0)
6fda7350 3925 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3926}
3927
1da177e4
LT		 3928static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3929{
3930 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3931
3932 switch (event) {
3933 case RTM_NEWADDR:
95c385b4
NH		 3934 /*
3935 * If the address was optimistic
3936 * we inserted the route at the start of
3937 * our DAD process, so we don't need
3938 * to do it again
3939 */
3940 if (!(ifp->rt->rt6i_node))
3941 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3942 if (ifp->idev->cnf.forwarding)
3943 addrconf_join_anycast(ifp);
3944 break;
3945 case RTM_DELADDR:
3946 if (ifp->idev->cnf.forwarding)
3947 addrconf_leave_anycast(ifp);
3948 addrconf_leave_solict(ifp->idev, &ifp->addr);
3949 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3950 if (ip6_del_rt(ifp->rt))
1da177e4 3951 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3952 break;
3953 }
3954}
3955
3956static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3957{
8814c4b5 3958 rcu_read_lock_bh();
1da177e4
LT		 3959 if (likely(ifp->idev->dead == 0))
3960 __ipv6_ifa_notify(event, ifp);
8814c4b5 3961 rcu_read_unlock_bh();
1da177e4
LT		 3962}
3963
3964#ifdef CONFIG_SYSCTL
3965
3966static
3967int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3968 void __user *buffer, size_t *lenp, loff_t *ppos)
3969{
3970 int *valp = ctl->data;
3971 int val = *valp;
3972 int ret;
3973
3974 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3975
c8fecf22
PE		 3976 if (write)
3977 addrconf_fixup_forwarding(ctl, valp, val);
1ab1457c 3978 return ret;
1da177e4
LT		 3979}
3980
1ab1457c 3981static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3982 int __user *name, int nlen,
3983 void __user *oldval,
3984 size_t __user *oldlenp,
1f29bcd7 3985 void __user *newval, size_t newlen)
1da177e4
LT		 3986{
3987 int *valp = table->data;
c8fecf22 3988 int val = *valp;
1da177e4
LT		 3989 int new;
3990
3991 if (!newval || !newlen)
3992 return 0;
3993 if (newlen != sizeof(int))
3994 return -EINVAL;
3995 if (get_user(new, (int __user *)newval))
3996 return -EFAULT;
3997 if (new == *valp)
3998 return 0;
3999 if (oldval && oldlenp) {
4000 size_t len;
4001 if (get_user(len, oldlenp))
4002 return -EFAULT;
4003 if (len) {
4004 if (len > table->maxlen)
4005 len = table->maxlen;
4006 if (copy_to_user(oldval, valp, len))
4007 return -EFAULT;
4008 if (put_user(len, oldlenp))
4009 return -EFAULT;
4010 }
4011 }
4012
c8fecf22
PE		 4013 *valp = new;
4014 addrconf_fixup_forwarding(table, valp, val);
1da177e4
LT		 4015 return 1;
4016}
4017
4018static struct addrconf_sysctl_table
4019{
4020 struct ctl_table_header *sysctl_header;
f6a07b29 4021 ctl_table addrconf_vars[DEVCONF_MAX+1];
1dab6222 4022 char *dev_name;
ab32ea5d 4023} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4024 .sysctl_header = NULL,
4025 .addrconf_vars = {
1ab1457c 4026 {
1da177e4
LT		 4027 .ctl_name = NET_IPV6_FORWARDING,
4028 .procname = "forwarding",
1ab1457c 4029 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 4030 .maxlen = sizeof(int),
4031 .mode = 0644,
1ab1457c 4032 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 4033 .strategy = &addrconf_sysctl_forward_strategy,
4034 },
4035 {
4036 .ctl_name = NET_IPV6_HOP_LIMIT,
4037 .procname = "hop_limit",
1ab1457c 4038 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 4039 .maxlen = sizeof(int),
4040 .mode = 0644,
4041 .proc_handler = proc_dointvec,
4042 },
4043 {
4044 .ctl_name = NET_IPV6_MTU,
4045 .procname = "mtu",
4046 .data = &ipv6_devconf.mtu6,
1ab1457c 4047 .maxlen = sizeof(int),
1da177e4 4048 .mode = 0644,
1ab1457c 4049 .proc_handler = &proc_dointvec,
1da177e4
LT		 4050 },
4051 {
4052 .ctl_name = NET_IPV6_ACCEPT_RA,
4053 .procname = "accept_ra",
1ab1457c 4054 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 4055 .maxlen = sizeof(int),
4056 .mode = 0644,
1ab1457c 4057 .proc_handler = &proc_dointvec,
1da177e4
LT		 4058 },
4059 {
4060 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
4061 .procname = "accept_redirects",
1ab1457c 4062 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 4063 .maxlen = sizeof(int),
4064 .mode = 0644,
1ab1457c 4065 .proc_handler = &proc_dointvec,
1da177e4
LT		 4066 },
4067 {
4068 .ctl_name = NET_IPV6_AUTOCONF,
4069 .procname = "autoconf",
1ab1457c 4070 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 4071 .maxlen = sizeof(int),
4072 .mode = 0644,
1ab1457c 4073 .proc_handler = &proc_dointvec,
1da177e4
LT		 4074 },
4075 {
4076 .ctl_name = NET_IPV6_DAD_TRANSMITS,
4077 .procname = "dad_transmits",
1ab1457c 4078 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 4079 .maxlen = sizeof(int),
4080 .mode = 0644,
1ab1457c 4081 .proc_handler = &proc_dointvec,
1da177e4
LT		 4082 },
4083 {
4084 .ctl_name = NET_IPV6_RTR_SOLICITS,
4085 .procname = "router_solicitations",
1ab1457c 4086 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 4087 .maxlen = sizeof(int),
4088 .mode = 0644,
1ab1457c 4089 .proc_handler = &proc_dointvec,
1da177e4
LT		 4090 },
4091 {
4092 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
4093 .procname = "router_solicitation_interval",
1ab1457c 4094 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 4095 .maxlen = sizeof(int),
4096 .mode = 0644,
1ab1457c 4097 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 4098 .strategy = &sysctl_jiffies,
4099 },
4100 {
4101 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
4102 .procname = "router_solicitation_delay",
1ab1457c 4103 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 4104 .maxlen = sizeof(int),
4105 .mode = 0644,
1ab1457c 4106 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 4107 .strategy = &sysctl_jiffies,
4108 },
4109 {
4110 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
4111 .procname = "force_mld_version",
1ab1457c 4112 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 4113 .maxlen = sizeof(int),
4114 .mode = 0644,
1ab1457c 4115 .proc_handler = &proc_dointvec,
1da177e4
LT		 4116 },
4117#ifdef CONFIG_IPV6_PRIVACY
4118 {
4119 .ctl_name = NET_IPV6_USE_TEMPADDR,
4120 .procname = "use_tempaddr",
1ab1457c 4121 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 4122 .maxlen = sizeof(int),
4123 .mode = 0644,
1ab1457c 4124 .proc_handler = &proc_dointvec,
1da177e4
LT		 4125 },
4126 {
4127 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
4128 .procname = "temp_valid_lft",
1ab1457c 4129 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 4130 .maxlen = sizeof(int),
4131 .mode = 0644,
1ab1457c 4132 .proc_handler = &proc_dointvec,
1da177e4
LT		 4133 },
4134 {
4135 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
4136 .procname = "temp_prefered_lft",
1ab1457c 4137 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 4138 .maxlen = sizeof(int),
4139 .mode = 0644,
1ab1457c 4140 .proc_handler = &proc_dointvec,
1da177e4
LT		 4141 },
4142 {
4143 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
4144 .procname = "regen_max_retry",
1ab1457c 4145 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 4146 .maxlen = sizeof(int),
4147 .mode = 0644,
1ab1457c 4148 .proc_handler = &proc_dointvec,
1da177e4
LT		 4149 },
4150 {
4151 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
4152 .procname = "max_desync_factor",
1ab1457c 4153 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 4154 .maxlen = sizeof(int),
4155 .mode = 0644,
1ab1457c 4156 .proc_handler = &proc_dointvec,
1da177e4
LT		 4157 },
4158#endif
4159 {
4160 .ctl_name = NET_IPV6_MAX_ADDRESSES,
4161 .procname = "max_addresses",
4162 .data = &ipv6_devconf.max_addresses,
4163 .maxlen = sizeof(int),
4164 .mode = 0644,
4165 .proc_handler = &proc_dointvec,
4166 },
65f5c7c1
YH		 4167 {
4168 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4169 .procname = "accept_ra_defrtr",
1ab1457c 4170 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4171 .maxlen = sizeof(int),
4172 .mode = 0644,
1ab1457c 4173 .proc_handler = &proc_dointvec,
65f5c7c1 4174 },
c4fd30eb
YH		 4175 {
4176 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4177 .procname = "accept_ra_pinfo",
1ab1457c 4178 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4179 .maxlen = sizeof(int),
4180 .mode = 0644,
1ab1457c 4181 .proc_handler = &proc_dointvec,
c4fd30eb 4182 },
930d6ff2
YH		 4183#ifdef CONFIG_IPV6_ROUTER_PREF
4184 {
4185 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4186 .procname = "accept_ra_rtr_pref",
4187 .data = &ipv6_devconf.accept_ra_rtr_pref,
4188 .maxlen = sizeof(int),
4189 .mode = 0644,
4190 .proc_handler = &proc_dointvec,
4191 },
52e16356
YH		 4192 {
4193 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4194 .procname = "router_probe_interval",
4195 .data = &ipv6_devconf.rtr_probe_interval,
4196 .maxlen = sizeof(int),
4197 .mode = 0644,
4198 .proc_handler = &proc_dointvec_jiffies,
4199 .strategy = &sysctl_jiffies,
4200 },
fa03ef38 4201#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4202 {
4203 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4204 .procname = "accept_ra_rt_info_max_plen",
4205 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4206 .maxlen = sizeof(int),
4207 .mode = 0644,
4208 .proc_handler = &proc_dointvec,
4209 },
4210#endif
930d6ff2 4211#endif
fbea49e1
YH		 4212 {
4213 .ctl_name = NET_IPV6_PROXY_NDP,
4214 .procname = "proxy_ndp",
4215 .data = &ipv6_devconf.proxy_ndp,
4216 .maxlen = sizeof(int),
4217 .mode = 0644,
4218 .proc_handler = &proc_dointvec,
4219 },
0bcbc926
YH		 4220 {
4221 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4222 .procname = "accept_source_route",
4223 .data = &ipv6_devconf.accept_source_route,
4224 .maxlen = sizeof(int),
4225 .mode = 0644,
4226 .proc_handler = &proc_dointvec,
4227 },
95c385b4
NH		 4228#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4229 {
4230 .ctl_name = CTL_UNNUMBERED,
4231 .procname = "optimistic_dad",
4232 .data = &ipv6_devconf.optimistic_dad,
4233 .maxlen = sizeof(int),
4234 .mode = 0644,
4235 .proc_handler = &proc_dointvec,
4236
4237 },
7bc570c8
YH		 4238#endif
4239#ifdef CONFIG_IPV6_MROUTE
4240 {
4241 .ctl_name = CTL_UNNUMBERED,
4242 .procname = "mc_forwarding",
4243 .data = &ipv6_devconf.mc_forwarding,
4244 .maxlen = sizeof(int),
4245 .mode = 0644,
4246 .proc_handler = &proc_dointvec,
4247 },
95c385b4 4248#endif
778d80be
YH		 4249 {
4250 .ctl_name = CTL_UNNUMBERED,
4251 .procname = "disable_ipv6",
4252 .data = &ipv6_devconf.disable_ipv6,
4253 .maxlen = sizeof(int),
4254 .mode = 0644,
4255 .proc_handler = &proc_dointvec,
4256 },
1b34be74
YH		 4257 {
4258 .ctl_name = CTL_UNNUMBERED,
4259 .procname = "accept_dad",
4260 .data = &ipv6_devconf.accept_dad,
4261 .maxlen = sizeof(int),
4262 .mode = 0644,
4263 .proc_handler = &proc_dointvec,
4264 },
1da177e4
LT		 4265 {
4266 .ctl_name = 0, /* sentinel */
4267 }
4268 },
1da177e4
LT		 4269};
4270
bff16c2f
PE		 4271static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4272 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4273{
4274 int i;
1da177e4 4275 struct addrconf_sysctl_table *t;
1da177e4 4276
1dab6222
PE		 4277#define ADDRCONF_CTL_PATH_DEV 3
4278
4279 struct ctl_path addrconf_ctl_path[] = {
4280 { .procname = "net", .ctl_name = CTL_NET, },
4281 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4282 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4283 { /* to be set */ },
4284 { },
4285 };
4286
4287
af879cc7 4288 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4289 if (t == NULL)
f68635e6
PE		 4290 goto out;
4291
1da177e4
LT		 4292 for (i=0; t->addrconf_vars[i].data; i++) {
4293 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4294 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4295 t->addrconf_vars[i].extra2 = net;
1da177e4 4296 }
1da177e4 4297
1ab1457c
YH		 4298 /*
4299 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4300 * by sysctl and we wouldn't want anyone to change it under our feet
4301 * (see SIOCSIFNAME).
1ab1457c 4302 */
1dab6222
PE		 4303 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4304 if (!t->dev_name)
f68635e6 4305 goto free;
1da177e4 4306
1dab6222
PE		 4307 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4308 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
1da177e4 4309
bff16c2f 4310 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4311 t->addrconf_vars);
1da177e4
LT		 4312 if (t->sysctl_header == NULL)
4313 goto free_procname;
f68635e6
PE		 4314
4315 p->sysctl = t;
95897312 4316 return 0;
1da177e4 4317
f68635e6 4318free_procname:
1dab6222 4319 kfree(t->dev_name);
f68635e6 4320free:
1da177e4 4321 kfree(t);
f68635e6 4322out:
95897312 4323 return -ENOBUFS;
1da177e4
LT		 4324}
4325
408c4768
PE		 4326static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4327{
4328 struct addrconf_sysctl_table *t;
4329
4330 if (p->sysctl == NULL)
4331 return;
4332
4333 t = p->sysctl;
4334 p->sysctl = NULL;
4335 unregister_sysctl_table(t->sysctl_header);
4336 kfree(t->dev_name);
4337 kfree(t);
4338}
4339
f52295a9
PE		 4340static void addrconf_sysctl_register(struct inet6_dev *idev)
4341{
408c4768
PE		 4342 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4343 NET_IPV6_NEIGH, "ipv6",
4344 &ndisc_ifinfo_sysctl_change,
0686caa3 4345 ndisc_ifinfo_sysctl_strategy);
c346dca1 4346 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
bff16c2f 4347 idev->dev->ifindex, idev, &idev->cnf);
f52295a9
PE		 4348}
4349
408c4768 4350static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4351{
408c4768
PE		 4352 __addrconf_sysctl_unregister(&idev->cnf);
4353 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4354}
4355
4356
4357#endif
4358
e0da5a48
PE		 4359static int addrconf_init_net(struct net *net)
4360{
4361 int err;
4362 struct ipv6_devconf *all, *dflt;
4363
4364 err = -ENOMEM;
4365 all = &ipv6_devconf;
4366 dflt = &ipv6_devconf_dflt;
4367
4368 if (net != &init_net) {
4369 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4370 if (all == NULL)
4371 goto err_alloc_all;
4372
4373 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4374 if (dflt == NULL)
4375 goto err_alloc_dflt;
4376 }
4377
4378 net->ipv6.devconf_all = all;
4379 net->ipv6.devconf_dflt = dflt;
4380
4381#ifdef CONFIG_SYSCTL
4382 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4383 NULL, all);
4384 if (err < 0)
4385 goto err_reg_all;
4386
4387 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4388 NULL, dflt);
4389 if (err < 0)
4390 goto err_reg_dflt;
4391#endif
4392 return 0;
4393
4394#ifdef CONFIG_SYSCTL
4395err_reg_dflt:
4396 __addrconf_sysctl_unregister(all);
4397err_reg_all:
4398 kfree(dflt);
4399#endif
4400err_alloc_dflt:
4401 kfree(all);
4402err_alloc_all:
4403 return err;
4404}
4405
4406static void addrconf_exit_net(struct net *net)
4407{
4408#ifdef CONFIG_SYSCTL
4409 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4410 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4411#endif
4412 if (net != &init_net) {
4413 kfree(net->ipv6.devconf_dflt);
4414 kfree(net->ipv6.devconf_all);
4415 }
4416}
4417
4418static struct pernet_operations addrconf_ops = {
4419 .init = addrconf_init_net,
4420 .exit = addrconf_exit_net,
4421};
4422
1da177e4
LT		 4423/*
4424 * Device notifier
4425 */
4426
4427int register_inet6addr_notifier(struct notifier_block *nb)
4428{
1ab1457c 4429 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4430}
4431
7159039a
YH		 4432EXPORT_SYMBOL(register_inet6addr_notifier);
4433
1da177e4
LT		 4434int unregister_inet6addr_notifier(struct notifier_block *nb)
4435{
1ab1457c 4436 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4437}
4438
7159039a
YH		 4439EXPORT_SYMBOL(unregister_inet6addr_notifier);
4440
af284937
DL		 4441static void addrconf_net_exit(struct net *net)
4442{
6fda7350
BT		 4443 struct net_device *dev;
4444
6fda7350
BT		 4445 rtnl_lock();
4446 /* clean dev list */
4447 for_each_netdev(net, dev) {
4448 if (__in6_dev_get(dev) == NULL)
4449 continue;
4450 addrconf_ifdown(dev, 1);
4451 }
4452 addrconf_ifdown(net->loopback_dev, 2);
4453 rtnl_unlock();
af284937
DL		 4454}
4455
4456static struct pernet_operations addrconf_net_ops = {
af284937
DL		 4457 .exit = addrconf_net_exit,
4458};
4459
1da177e4
LT		 4460/*
4461 * Init / cleanup code
4462 */
4463
4464int __init addrconf_init(void)
4465{
2a8cc6c8
YH		 4466 int err;
4467
4468 if ((err = ipv6_addr_label_init()) < 0) {
4469 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4470 err);
4471 return err;
4472 }
1da177e4 4473
e0da5a48
PE		 4474 register_pernet_subsys(&addrconf_ops);
4475
1da177e4
LT		 4476 /* The addrconf netdev notifier requires that loopback_dev
4477 * has it's ipv6 private information allocated and setup
4478 * before it can bring up and give link-local addresses
4479 * to other devices which are up.
4480 *
4481 * Unfortunately, loopback_dev is not necessarily the first
4482 * entry in the global dev_base list of net devices. In fact,
4483 * it is likely to be the very last entry on that list.
4484 * So this causes the notifier registry below to try and
4485 * give link-local addresses to all devices besides loopback_dev
4486 * first, then loopback_dev, which cases all the non-loopback_dev
4487 * devices to fail to get a link-local address.
4488 *
4489 * So, as a temporary fix, allocate the ipv6 structure for
4490 * loopback_dev first by hand.
4491 * Longer term, all of the dependencies ipv6 has upon the loopback
4492 * device and it being up should be removed.
4493 */
4494 rtnl_lock();
2774c7ab 4495 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4496 err = -ENOMEM;
4497 rtnl_unlock();
4498 if (err)
e0da5a48 4499 goto errlo;
1da177e4 4500
af284937
DL		 4501 err = register_pernet_device(&addrconf_net_ops);
4502 if (err)
4503 return err;
4504
1da177e4
LT		 4505 register_netdevice_notifier(&ipv6_dev_notf);
4506
1da177e4 4507 addrconf_verify(0);
c127ea2c
TG		 4508
4509 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4510 if (err < 0)
4511 goto errout;
4512
4513 /* Only the first call to __rtnl_register can fail */
4514 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4515 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4516 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4517 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4518 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4519
2a8cc6c8
YH		 4520 ipv6_addr_label_rtnl_register();
4521
1da177e4 4522 return 0;
c127ea2c
TG		 4523errout:
4524 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4525errlo:
4526 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4527
4528 return err;
1da177e4
LT		 4529}
4530
09f7709f 4531void addrconf_cleanup(void)
1da177e4 4532{
1ab1457c 4533 struct inet6_ifaddr *ifa;
1da177e4
LT		 4534 int i;
4535
4536 unregister_netdevice_notifier(&ipv6_dev_notf);
af284937 4537 unregister_pernet_device(&addrconf_net_ops);
1da177e4 4538
e0da5a48 4539 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4540
4541 rtnl_lock();
4542
1da177e4
LT		 4543 /*
4544 * Check hash table.
4545 */
1da177e4
LT		 4546 write_lock_bh(&addrconf_hash_lock);
4547 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4548 for (ifa=inet6_addr_lst[i]; ifa; ) {
4549 struct inet6_ifaddr *bifa;
4550
4551 bifa = ifa;
4552 ifa = ifa->lst_next;
4553 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4554 /* Do not free it; something is wrong.
4555 Now we can investigate it with debugger.
4556 */
4557 }
4558 }
4559 write_unlock_bh(&addrconf_hash_lock);
4560
4561 del_timer(&addr_chk_timer);
1da177e4 4562 rtnl_unlock();
af284937
DL		 4563
4564 unregister_pernet_subsys(&addrconf_net_ops);
1da177e4 4565}
Clone of davem's net-next-2.6 tree