]> bbs.cooldavid.org Git - net-next-2.6.git/blame - net/ipv6/addrconf.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ipv6: user better hash for addrconf
[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>
a0bffffc 43#include <linux/kernel.h>
1da177e4
LT		 44#include <linux/socket.h>
45#include <linux/sockios.h>
1da177e4
LT		 46#include <linux/net.h>
47#include <linux/in6.h>
48#include <linux/netdevice.h>
1823730f 49#include <linux/if_addr.h>
1da177e4
LT		 50#include <linux/if_arp.h>
51#include <linux/if_arcnet.h>
52#include <linux/if_infiniband.h>
53#include <linux/route.h>
54#include <linux/inetdevice.h>
55#include <linux/init.h>
56#ifdef CONFIG_SYSCTL
57#include <linux/sysctl.h>
58#endif
4fc268d2 59#include <linux/capability.h>
1da177e4
LT		 60#include <linux/delay.h>
61#include <linux/notifier.h>
543537bd 62#include <linux/string.h>
1da177e4 63
457c4cbc 64#include <net/net_namespace.h>
1da177e4
LT		 65#include <net/sock.h>
66#include <net/snmp.h>
67
68#include <net/ipv6.h>
69#include <net/protocol.h>
70#include <net/ndisc.h>
71#include <net/ip6_route.h>
72#include <net/addrconf.h>
73#include <net/tcp.h>
74#include <net/ip.h>
5d620266 75#include <net/netlink.h>
f24e3d65 76#include <net/pkt_sched.h>
1da177e4
LT		 77#include <linux/if_tunnel.h>
78#include <linux/rtnetlink.h>
79
80#ifdef CONFIG_IPV6_PRIVACY
81#include <linux/random.h>
1da177e4
LT		 82#endif
83
84#include <asm/uaccess.h>
7f7d9a6b 85#include <asm/unaligned.h>
1da177e4
LT		 86
87#include <linux/proc_fs.h>
88#include <linux/seq_file.h>
89
90/* Set to 3 to get tracing... */
91#define ACONF_DEBUG 2
92
93#if ACONF_DEBUG >= 3
94#define ADBG(x) printk x
95#else
96#define ADBG(x)
97#endif
98
99#define INFINITY_LIFE_TIME 0xFFFFFFFF
100#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101
102#ifdef CONFIG_SYSCTL
f52295a9 103static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 104static void addrconf_sysctl_unregister(struct inet6_dev *idev);
105#else
106static inline void addrconf_sysctl_register(struct inet6_dev *idev)
107{
108}
109
110static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
111{
112}
1da177e4
LT		 113#endif
114
115#ifdef CONFIG_IPV6_PRIVACY
116static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 117static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 118static void ipv6_regen_rndid(unsigned long data);
119
120static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 121#endif
122
1b34be74 123static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1da177e4
LT		 124static int ipv6_count_addresses(struct inet6_dev *idev);
125
126/*
127 * Configured unicast address hash table
128 */
c2e21293 129static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
5c578aed 130static DEFINE_SPINLOCK(addrconf_hash_lock);
1da177e4 131
1da177e4
LT		 132static void addrconf_verify(unsigned long);
133
8d06afab 134static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 135static DEFINE_SPINLOCK(addrconf_verify_lock);
136
137static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
139
93d9b7d7
JP		 140static void addrconf_type_change(struct net_device *dev,
141 unsigned long event);
1da177e4
LT		 142static int addrconf_ifdown(struct net_device *dev, int how);
143
e431b8c0 144static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 145static void addrconf_dad_timer(unsigned long data);
146static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 147static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 148static void addrconf_rs_timer(unsigned long data);
149static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
150static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
151
1ab1457c 152static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 153 struct prefix_info *pinfo);
06bfe655
DL		 154static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
155 struct net_device *dev);
1da177e4 156
e041c683 157static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 158
888c848e 159static struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 160 .forwarding = 0,
161 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
162 .mtu6 = IPV6_MIN_MTU,
163 .accept_ra = 1,
164 .accept_redirects = 1,
165 .autoconf = 1,
166 .force_mld_version = 0,
167 .dad_transmits = 1,
168 .rtr_solicits = MAX_RTR_SOLICITATIONS,
169 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
170 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
171#ifdef CONFIG_IPV6_PRIVACY
172 .use_tempaddr = 0,
173 .temp_valid_lft = TEMP_VALID_LIFETIME,
174 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
175 .regen_max_retry = REGEN_MAX_RETRY,
176 .max_desync_factor = MAX_DESYNC_FACTOR,
177#endif
178 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 179 .accept_ra_defrtr = 1,
c4fd30eb 180 .accept_ra_pinfo = 1,
930d6ff2
YH		 181#ifdef CONFIG_IPV6_ROUTER_PREF
182 .accept_ra_rtr_pref = 1,
52e16356 183 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 184#ifdef CONFIG_IPV6_ROUTE_INFO
185 .accept_ra_rt_info_max_plen = 0,
186#endif
930d6ff2 187#endif
fbea49e1 188 .proxy_ndp = 0,
0bcbc926 189 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 190 .disable_ipv6 = 0,
1b34be74 191 .accept_dad = 1,
1da177e4
LT		 192};
193
ab32ea5d 194static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 195 .forwarding = 0,
196 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
197 .mtu6 = IPV6_MIN_MTU,
198 .accept_ra = 1,
199 .accept_redirects = 1,
200 .autoconf = 1,
201 .dad_transmits = 1,
202 .rtr_solicits = MAX_RTR_SOLICITATIONS,
203 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
204 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
205#ifdef CONFIG_IPV6_PRIVACY
206 .use_tempaddr = 0,
207 .temp_valid_lft = TEMP_VALID_LIFETIME,
208 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
209 .regen_max_retry = REGEN_MAX_RETRY,
210 .max_desync_factor = MAX_DESYNC_FACTOR,
211#endif
212 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 213 .accept_ra_defrtr = 1,
c4fd30eb 214 .accept_ra_pinfo = 1,
930d6ff2
YH		 215#ifdef CONFIG_IPV6_ROUTER_PREF
216 .accept_ra_rtr_pref = 1,
52e16356 217 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 218#ifdef CONFIG_IPV6_ROUTE_INFO
219 .accept_ra_rt_info_max_plen = 0,
220#endif
930d6ff2 221#endif
fbea49e1 222 .proxy_ndp = 0,
0bcbc926 223 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 224 .disable_ipv6 = 0,
1b34be74 225 .accept_dad = 1,
1da177e4
LT		 226};
227
228/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 229const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4 230const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
f3ee4010
YH		 231const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
232const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
1da177e4 233
f24e3d65 234/* Check if a valid qdisc is available */
05297949 235static inline bool addrconf_qdisc_ok(const struct net_device *dev)
f24e3d65 236{
05297949 237 return !qdisc_tx_is_noop(dev);
f24e3d65
MC		 238}
239
2b5ead46
YH		 240/* Check if a route is valid prefix route */
241static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
242{
243 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
244}
245
1da177e4
LT		 246static void addrconf_del_timer(struct inet6_ifaddr *ifp)
247{
248 if (del_timer(&ifp->timer))
249 __in6_ifa_put(ifp);
250}
251
252enum addrconf_timer_t
253{
254 AC_NONE,
255 AC_DAD,
256 AC_RS,
257};
258
259static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
260 enum addrconf_timer_t what,
261 unsigned long when)
262{
263 if (!del_timer(&ifp->timer))
264 in6_ifa_hold(ifp);
265
266 switch (what) {
267 case AC_DAD:
268 ifp->timer.function = addrconf_dad_timer;
269 break;
270 case AC_RS:
271 ifp->timer.function = addrconf_rs_timer;
272 break;
273 default:;
274 }
275 ifp->timer.expires = jiffies + when;
276 add_timer(&ifp->timer);
277}
278
7f7d9a6b
HX		 279static int snmp6_alloc_dev(struct inet6_dev *idev)
280{
7d720c3e 281 if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
c69bce20 282 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b 283 goto err_ip;
7d720c3e 284 if (snmp_mib_init((void __percpu **)idev->stats.icmpv6,
c69bce20 285 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 286 goto err_icmp;
7d720c3e 287 if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg,
c69bce20 288 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 289 goto err_icmpmsg;
7f7d9a6b
HX		 290
291 return 0;
292
14878f75 293err_icmpmsg:
7d720c3e 294 snmp_mib_free((void __percpu **)idev->stats.icmpv6);
7f7d9a6b 295err_icmp:
7d720c3e 296 snmp_mib_free((void __percpu **)idev->stats.ipv6);
7f7d9a6b 297err_ip:
aaf70ec7 298 return -ENOMEM;
7f7d9a6b
HX		 299}
300
16910b98 301static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 302{
7d720c3e
TH		 303 snmp_mib_free((void __percpu **)idev->stats.icmpv6msg);
304 snmp_mib_free((void __percpu **)idev->stats.icmpv6);
305 snmp_mib_free((void __percpu **)idev->stats.ipv6);
7f7d9a6b
HX		 306}
307
1da177e4
LT		 308/* Nobody refers to this device, we may destroy it. */
309
8814c4b5
YH		 310static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
311{
312 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
313 kfree(idev);
314}
315
1da177e4
LT		 316void in6_dev_finish_destroy(struct inet6_dev *idev)
317{
318 struct net_device *dev = idev->dev;
547b792c
IJ		 319
320 WARN_ON(idev->addr_list != NULL);
321 WARN_ON(idev->mc_list != NULL);
322
1da177e4
LT		 323#ifdef NET_REFCNT_DEBUG
324 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
325#endif
326 dev_put(dev);
327 if (!idev->dead) {
328 printk("Freeing alive inet6 device %p\n", idev);
329 return;
330 }
331 snmp6_free_dev(idev);
8814c4b5 332 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 333}
334
7159039a
YH		 335EXPORT_SYMBOL(in6_dev_finish_destroy);
336
1da177e4
LT		 337static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
338{
339 struct inet6_dev *ndev;
340
341 ASSERT_RTNL();
342
343 if (dev->mtu < IPV6_MIN_MTU)
344 return NULL;
345
1ab1457c 346 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 347
1ab1457c
YH		 348 if (ndev == NULL)
349 return NULL;
322f74a4
IO		 350
351 rwlock_init(&ndev->lock);
352 ndev->dev = dev;
c346dca1 353 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 354 ndev->cnf.mtu6 = dev->mtu;
355 ndev->cnf.sysctl = NULL;
356 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
357 if (ndev->nd_parms == NULL) {
358 kfree(ndev);
359 return NULL;
360 }
0187bdfb
BH		 361 if (ndev->cnf.forwarding)
362 dev_disable_lro(dev);
322f74a4
IO		 363 /* We refer to the device */
364 dev_hold(dev);
1da177e4 365
322f74a4
IO		 366 if (snmp6_alloc_dev(ndev) < 0) {
367 ADBG((KERN_WARNING
368 "%s(): cannot allocate memory for statistics; dev=%s.\n",
0dc47877 369 __func__, dev->name));
322f74a4
IO		 370 neigh_parms_release(&nd_tbl, ndev->nd_parms);
371 ndev->dead = 1;
372 in6_dev_finish_destroy(ndev);
373 return NULL;
374 }
1da177e4 375
322f74a4
IO		 376 if (snmp6_register_dev(ndev) < 0) {
377 ADBG((KERN_WARNING
378 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
0dc47877 379 __func__, dev->name));
322f74a4
IO		 380 neigh_parms_release(&nd_tbl, ndev->nd_parms);
381 ndev->dead = 1;
382 in6_dev_finish_destroy(ndev);
383 return NULL;
384 }
385
386 /* One reference from device. We must do this before
387 * we invoke __ipv6_regen_rndid().
388 */
389 in6_dev_hold(ndev);
1da177e4 390
1b34be74
YH		 391 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
392 ndev->cnf.accept_dad = -1;
393
b077d7ab
YH		 394#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
395 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
396 printk(KERN_INFO
397 "%s: Disabled Multicast RS\n",
398 dev->name);
399 ndev->cnf.rtr_solicits = 0;
400 }
401#endif
402
1da177e4 403#ifdef CONFIG_IPV6_PRIVACY
372e6c8f 404 INIT_LIST_HEAD(&ndev->tempaddr_list);
b24b8a24 405 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 406 if ((dev->flags&IFF_LOOPBACK) ||
407 dev->type == ARPHRD_TUNNEL ||
9625ed72 408 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 409 dev->type == ARPHRD_SIT ||
0be669bb 410 dev->type == ARPHRD_NONE) {
322f74a4
IO		 411 printk(KERN_INFO
412 "%s: Disabled Privacy Extensions\n",
413 dev->name);
414 ndev->cnf.use_tempaddr = -1;
415 } else {
416 in6_dev_hold(ndev);
417 ipv6_regen_rndid((unsigned long) ndev);
418 }
1da177e4
LT		 419#endif
420
f24e3d65 421 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 422 ndev->if_flags |= IF_READY;
423
322f74a4
IO		 424 ipv6_mc_init_dev(ndev);
425 ndev->tstamp = jiffies;
f52295a9 426 addrconf_sysctl_register(ndev);
30c4cf57
DS		 427 /* protected by rtnl_lock */
428 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 429
430 /* Join all-node multicast group */
f3ee4010 431 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 432
1da177e4
LT		 433 return ndev;
434}
435
cee89473 436static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 437{
438 struct inet6_dev *idev;
439
440 ASSERT_RTNL();
441
442 if ((idev = __in6_dev_get(dev)) == NULL) {
443 if ((idev = ipv6_add_dev(dev)) == NULL)
444 return NULL;
445 }
c5e33bdd 446
1da177e4
LT		 447 if (dev->flags&IFF_UP)
448 ipv6_mc_up(idev);
449 return idev;
450}
451
452#ifdef CONFIG_SYSCTL
453static void dev_forward_change(struct inet6_dev *idev)
454{
455 struct net_device *dev;
456 struct inet6_ifaddr *ifa;
1da177e4
LT		 457
458 if (!idev)
459 return;
460 dev = idev->dev;
0187bdfb
BH		 461 if (idev->cnf.forwarding)
462 dev_disable_lro(dev);
1da177e4 463 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 464 if (idev->cnf.forwarding)
f3ee4010 465 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 466 else
f3ee4010 467 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4
LT		 468 }
469 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 470 if (ifa->flags&IFA_F_TENTATIVE)
471 continue;
1da177e4
LT		 472 if (idev->cnf.forwarding)
473 addrconf_join_anycast(ifa);
474 else
475 addrconf_leave_anycast(ifa);
476 }
477}
478
479
e186932b 480static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 481{
482 struct net_device *dev;
483 struct inet6_dev *idev;
484
c6d14c84
ED		 485 rcu_read_lock();
486 for_each_netdev_rcu(net, dev) {
1da177e4
LT		 487 idev = __in6_dev_get(dev);
488 if (idev) {
e186932b
PE		 489 int changed = (!idev->cnf.forwarding) ^ (!newf);
490 idev->cnf.forwarding = newf;
1da177e4
LT		 491 if (changed)
492 dev_forward_change(idev);
493 }
1da177e4 494 }
c6d14c84 495 rcu_read_unlock();
1da177e4 496}
c8fecf22 497
b325fddb 498static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
c8fecf22 499{
bff16c2f
PE		 500 struct net *net;
501
502 net = (struct net *)table->extra2;
441fc2a2 503 if (p == &net->ipv6.devconf_dflt->forwarding)
b325fddb
SH		 504 return 0;
505
88af182e
EB		 506 if (!rtnl_trylock()) {
507 /* Restore the original values before restarting */
508 *p = old;
5007392d 509 return restart_syscall();
88af182e 510 }
c8fecf22 511
e186932b
PE		 512 if (p == &net->ipv6.devconf_all->forwarding) {
513 __s32 newf = net->ipv6.devconf_all->forwarding;
514 net->ipv6.devconf_dflt->forwarding = newf;
515 addrconf_forward_change(net, newf);
c8fecf22
PE		 516 } else if ((!*p) ^ (!old))
517 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 518 rtnl_unlock();
c8fecf22
PE		 519
520 if (*p)
7b4da532 521 rt6_purge_dflt_routers(net);
b325fddb 522 return 1;
c8fecf22 523}
1da177e4
LT		 524#endif
525
5c578aed 526static void inet6_ifa_finish_destroy_rcu(struct rcu_head *head)
527{
528 struct inet6_ifaddr *ifp = container_of(head, struct inet6_ifaddr, rcu);
529 kfree(ifp);
530}
1da177e4 531
5c578aed 532/* Nobody refers to this ifaddr, destroy it */
1da177e4
LT		 533void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
534{
547b792c 535 WARN_ON(ifp->if_next != NULL);
c2e21293 536 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
547b792c 537
1da177e4
LT		 538#ifdef NET_REFCNT_DEBUG
539 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
540#endif
541
542 in6_dev_put(ifp->idev);
543
544 if (del_timer(&ifp->timer))
545 printk("Timer is still running, when freeing ifa=%p\n", ifp);
546
547 if (!ifp->dead) {
548 printk("Freeing alive inet6 address %p\n", ifp);
549 return;
550 }
551 dst_release(&ifp->rt->u.dst);
552
5c578aed 553 call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu);
1da177e4
LT		 554}
555
e55ffac6
BH		 556static void
557ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
558{
559 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 560 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 561
562 /*
563 * Each device address list is sorted in order of scope -
564 * global before linklocal.
565 */
566 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
567 ifap = &ifa->if_next) {
8a6ce0c0 568 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 569 break;
570 }
571
572 ifp->if_next = *ifap;
573 *ifap = ifp;
574}
575
3a88a81d 576static u32 ipv6_addr_hash(const struct in6_addr *addr)
3eb84f49 577{
3eb84f49
YH		 578 /*
579 * We perform the hash function over the last 64 bits of the address
580 * This will include the IEEE address token on links that support it.
581 */
3a88a81d 582 return jhash_2words(addr->s6_addr32[2], addr->s6_addr32[3], 0)
583 & (IN6_ADDR_HSIZE - 1);
3eb84f49
YH		 584}
585
1da177e4
LT		 586/* On success it returns ifp with increased reference count */
587
588static struct inet6_ifaddr *
589ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 590 int scope, u32 flags)
1da177e4
LT		 591{
592 struct inet6_ifaddr *ifa = NULL;
593 struct rt6_info *rt;
3a88a81d 594 unsigned int hash;
1da177e4 595 int err = 0;
d68b8270
YH		 596 int addr_type = ipv6_addr_type(addr);
597
598 if (addr_type == IPV6_ADDR_ANY ||
599 addr_type & IPV6_ADDR_MULTICAST ||
600 (!(idev->dev->flags & IFF_LOOPBACK) &&
601 addr_type & IPV6_ADDR_LOOPBACK))
602 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 603
8814c4b5 604 rcu_read_lock_bh();
1da177e4
LT		 605 if (idev->dead) {
606 err = -ENODEV; /*XXX*/
607 goto out2;
608 }
609
56d417b1 610 if (idev->cnf.disable_ipv6) {
9bdd8d40
BH		 611 err = -EACCES;
612 goto out2;
613 }
614
5c578aed 615 spin_lock(&addrconf_hash_lock);
1da177e4
LT		 616
617 /* Ignore adding duplicate addresses on an interface */
c346dca1 618 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 619 ADBG(("ipv6_add_addr: already assigned\n"));
620 err = -EEXIST;
621 goto out;
622 }
623
322f74a4 624 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 625
626 if (ifa == NULL) {
627 ADBG(("ipv6_add_addr: malloc failed\n"));
628 err = -ENOBUFS;
629 goto out;
630 }
631
632 rt = addrconf_dst_alloc(idev, addr, 0);
633 if (IS_ERR(rt)) {
634 err = PTR_ERR(rt);
635 goto out;
636 }
637
1da177e4
LT		 638 ipv6_addr_copy(&ifa->addr, addr);
639
640 spin_lock_init(&ifa->lock);
641 init_timer(&ifa->timer);
c2e21293 642 INIT_HLIST_NODE(&ifa->addr_lst);
1da177e4
LT		 643 ifa->timer.data = (unsigned long) ifa;
644 ifa->scope = scope;
645 ifa->prefix_len = pfxlen;
646 ifa->flags = flags | IFA_F_TENTATIVE;
647 ifa->cstamp = ifa->tstamp = jiffies;
648
57f5f544
KF		 649 ifa->rt = rt;
650
95c385b4
NH		 651 /*
652 * part one of RFC 4429, section 3.3
653 * We should not configure an address as
654 * optimistic if we do not yet know the link
655 * layer address of our nexhop router
656 */
657
658 if (rt->rt6i_nexthop == NULL)
659 ifa->flags &= ~IFA_F_OPTIMISTIC;
660
1da177e4
LT		 661 ifa->idev = idev;
662 in6_dev_hold(idev);
663 /* For caller */
664 in6_ifa_hold(ifa);
665
666 /* Add to big hash table */
667 hash = ipv6_addr_hash(addr);
668
5c578aed 669 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
1da177e4 670 in6_ifa_hold(ifa);
5c578aed 671 spin_unlock(&addrconf_hash_lock);
1da177e4
LT		 672
673 write_lock(&idev->lock);
674 /* Add to inet6_dev unicast addr list. */
e55ffac6 675 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 676
677#ifdef CONFIG_IPV6_PRIVACY
678 if (ifa->flags&IFA_F_TEMPORARY) {
372e6c8f 679 list_add(&ifa->tmp_list, &idev->tempaddr_list);
1da177e4
LT		 680 in6_ifa_hold(ifa);
681 }
682#endif
683
1da177e4
LT		 684 in6_ifa_hold(ifa);
685 write_unlock(&idev->lock);
686out2:
8814c4b5 687 rcu_read_unlock_bh();
1da177e4 688
fd92833a 689 if (likely(err == 0))
e041c683 690 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 691 else {
692 kfree(ifa);
693 ifa = ERR_PTR(err);
694 }
695
696 return ifa;
697out:
5c578aed 698 spin_unlock(&addrconf_hash_lock);
1da177e4
LT		 699 goto out2;
700}
701
702/* This function wants to get referenced ifp and releases it before return */
703
704static void ipv6_del_addr(struct inet6_ifaddr *ifp)
705{
706 struct inet6_ifaddr *ifa, **ifap;
707 struct inet6_dev *idev = ifp->idev;
708 int hash;
709 int deleted = 0, onlink = 0;
710 unsigned long expires = jiffies;
711
712 hash = ipv6_addr_hash(&ifp->addr);
713
714 ifp->dead = 1;
715
5c578aed 716 spin_lock_bh(&addrconf_hash_lock);
717 hlist_del_init_rcu(&ifp->addr_lst);
c2e21293 718 __in6_ifa_put(ifp);
5c578aed 719 spin_unlock_bh(&addrconf_hash_lock);
1da177e4
LT		 720
721 write_lock_bh(&idev->lock);
722#ifdef CONFIG_IPV6_PRIVACY
723 if (ifp->flags&IFA_F_TEMPORARY) {
372e6c8f 724 list_del(&ifp->tmp_list);
725 if (ifp->ifpub) {
726 in6_ifa_put(ifp->ifpub);
727 ifp->ifpub = NULL;
1da177e4 728 }
372e6c8f 729 __in6_ifa_put(ifp);
1da177e4
LT		 730 }
731#endif
732
1d142804 733 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 734 if (ifa == ifp) {
735 *ifap = ifa->if_next;
736 __in6_ifa_put(ifp);
737 ifa->if_next = NULL;
738 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
739 break;
740 deleted = 1;
1d142804 741 continue;
1da177e4
LT		 742 } else if (ifp->flags & IFA_F_PERMANENT) {
743 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
744 ifp->prefix_len)) {
745 if (ifa->flags & IFA_F_PERMANENT) {
746 onlink = 1;
747 if (deleted)
748 break;
749 } else {
750 unsigned long lifetime;
751
752 if (!onlink)
753 onlink = -1;
754
755 spin_lock(&ifa->lock);
4bed72e4
YH		 756
757 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
758 /*
759 * Note: Because this address is
760 * not permanent, lifetime <
761 * LONG_MAX / HZ here.
762 */
1da177e4
LT		 763 if (time_before(expires,
764 ifa->tstamp + lifetime * HZ))
765 expires = ifa->tstamp + lifetime * HZ;
766 spin_unlock(&ifa->lock);
767 }
768 }
769 }
1d142804 770 ifap = &ifa->if_next;
1da177e4
LT		 771 }
772 write_unlock_bh(&idev->lock);
773
b2238566
AV		 774 addrconf_del_timer(ifp);
775
1da177e4
LT		 776 ipv6_ifa_notify(RTM_DELADDR, ifp);
777
e041c683 778 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 779
1da177e4
LT		 780 /*
781 * Purge or update corresponding prefix
782 *
783 * 1) we don't purge prefix here if address was not permanent.
784 * prefix is managed by its own lifetime.
785 * 2) if there're no addresses, delete prefix.
786 * 3) if there're still other permanent address(es),
787 * corresponding prefix is still permanent.
788 * 4) otherwise, update prefix lifetime to the
789 * longest valid lifetime among the corresponding
790 * addresses on the device.
791 * Note: subsequent RA will update lifetime.
792 *
793 * --yoshfuji
794 */
795 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
796 struct in6_addr prefix;
797 struct rt6_info *rt;
c346dca1 798 struct net *net = dev_net(ifp->idev->dev);
1da177e4 799 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 800 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 801
2b5ead46 802 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 803 if (onlink == 0) {
e0a1ad73 804 ip6_del_rt(rt);
1da177e4
LT		 805 rt = NULL;
806 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
807 rt->rt6i_expires = expires;
808 rt->rt6i_flags |= RTF_EXPIRES;
809 }
810 }
811 dst_release(&rt->u.dst);
812 }
813
814 in6_ifa_put(ifp);
815}
816
817#ifdef CONFIG_IPV6_PRIVACY
818static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
819{
820 struct inet6_dev *idev = ifp->idev;
821 struct in6_addr addr, *tmpaddr;
822 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 823 unsigned long regen_advance;
1da177e4
LT		 824 int tmp_plen;
825 int ret = 0;
826 int max_addresses;
95c385b4 827 u32 addr_flags;
1da177e4
LT		 828
829 write_lock(&idev->lock);
830 if (ift) {
831 spin_lock_bh(&ift->lock);
832 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
833 spin_unlock_bh(&ift->lock);
834 tmpaddr = &addr;
835 } else {
836 tmpaddr = NULL;
837 }
838retry:
839 in6_dev_hold(idev);
840 if (idev->cnf.use_tempaddr <= 0) {
841 write_unlock(&idev->lock);
842 printk(KERN_INFO
843 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
844 in6_dev_put(idev);
845 ret = -1;
846 goto out;
847 }
848 spin_lock_bh(&ifp->lock);
849 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
850 idev->cnf.use_tempaddr = -1; /*XXX*/
851 spin_unlock_bh(&ifp->lock);
852 write_unlock(&idev->lock);
853 printk(KERN_WARNING
854 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
855 in6_dev_put(idev);
856 ret = -1;
857 goto out;
858 }
859 in6_ifa_hold(ifp);
860 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
861 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
862 spin_unlock_bh(&ifp->lock);
863 write_unlock(&idev->lock);
864 printk(KERN_WARNING
865 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
866 in6_ifa_put(ifp);
867 in6_dev_put(idev);
868 ret = -1;
869 goto out;
870 }
871 memcpy(&addr.s6_addr[8], idev->rndid, 8);
872 tmp_valid_lft = min_t(__u32,
873 ifp->valid_lft,
874 idev->cnf.temp_valid_lft);
1ab1457c
YH		 875 tmp_prefered_lft = min_t(__u32,
876 ifp->prefered_lft,
1da177e4
LT		 877 idev->cnf.temp_prefered_lft - desync_factor / HZ);
878 tmp_plen = ifp->prefix_len;
879 max_addresses = idev->cnf.max_addresses;
880 tmp_cstamp = ifp->cstamp;
881 tmp_tstamp = ifp->tstamp;
882 spin_unlock_bh(&ifp->lock);
883
eac55bf9
BB		 884 regen_advance = idev->cnf.regen_max_retry *
885 idev->cnf.dad_transmits *
886 idev->nd_parms->retrans_time / HZ;
1da177e4 887 write_unlock(&idev->lock);
95c385b4 888
eac55bf9
BB		 889 /* A temporary address is created only if this calculated Preferred
890 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
891 * an implementation must not create a temporary address with a zero
892 * Preferred Lifetime.
893 */
894 if (tmp_prefered_lft <= regen_advance) {
895 in6_ifa_put(ifp);
896 in6_dev_put(idev);
897 ret = -1;
898 goto out;
899 }
900
95c385b4
NH		 901 addr_flags = IFA_F_TEMPORARY;
902 /* set in addrconf_prefix_rcv() */
903 if (ifp->flags & IFA_F_OPTIMISTIC)
904 addr_flags |= IFA_F_OPTIMISTIC;
905
1da177e4 906 ift = !max_addresses ||
1ab1457c 907 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 908 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 909 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
910 addr_flags) : NULL;
1da177e4
LT		 911 if (!ift || IS_ERR(ift)) {
912 in6_ifa_put(ifp);
913 in6_dev_put(idev);
914 printk(KERN_INFO
915 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
916 tmpaddr = &addr;
917 write_lock(&idev->lock);
918 goto retry;
919 }
920
921 spin_lock_bh(&ift->lock);
922 ift->ifpub = ifp;
923 ift->valid_lft = tmp_valid_lft;
924 ift->prefered_lft = tmp_prefered_lft;
925 ift->cstamp = tmp_cstamp;
926 ift->tstamp = tmp_tstamp;
927 spin_unlock_bh(&ift->lock);
928
929 addrconf_dad_start(ift, 0);
930 in6_ifa_put(ift);
931 in6_dev_put(idev);
932out:
933 return ret;
934}
935#endif
936
937/*
072047e4 938 * Choose an appropriate source address (RFC3484)
1da177e4 939 */
a9b05723
YH		 940enum {
941 IPV6_SADDR_RULE_INIT = 0,
942 IPV6_SADDR_RULE_LOCAL,
943 IPV6_SADDR_RULE_SCOPE,
944 IPV6_SADDR_RULE_PREFERRED,
945#ifdef CONFIG_IPV6_MIP6
946 IPV6_SADDR_RULE_HOA,
947#endif
948 IPV6_SADDR_RULE_OIF,
949 IPV6_SADDR_RULE_LABEL,
950#ifdef CONFIG_IPV6_PRIVACY
951 IPV6_SADDR_RULE_PRIVACY,
952#endif
953 IPV6_SADDR_RULE_ORCHID,
954 IPV6_SADDR_RULE_PREFIX,
955 IPV6_SADDR_RULE_MAX
956};
957
072047e4 958struct ipv6_saddr_score {
a9b05723
YH		 959 int rule;
960 int addr_type;
961 struct inet6_ifaddr *ifa;
962 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
963 int scopedist;
964 int matchlen;
072047e4
YH		 965};
966
a9b05723 967struct ipv6_saddr_dst {
9acd9f3a 968 const struct in6_addr *addr;
a9b05723
YH		 969 int ifindex;
970 int scope;
971 int label;
7cbca67c 972 unsigned int prefs;
a9b05723 973};
072047e4 974
b6f99a21 975static inline int ipv6_saddr_preferred(int type)
1da177e4 976{
45bb0060 977 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
072047e4
YH		 978 return 1;
979 return 0;
1da177e4
LT		 980}
981
3de23255
BT		 982static int ipv6_get_saddr_eval(struct net *net,
983 struct ipv6_saddr_score *score,
a9b05723
YH		 984 struct ipv6_saddr_dst *dst,
985 int i)
986{
987 int ret;
988
989 if (i <= score->rule) {
990 switch (i) {
991 case IPV6_SADDR_RULE_SCOPE:
992 ret = score->scopedist;
993 break;
994 case IPV6_SADDR_RULE_PREFIX:
995 ret = score->matchlen;
996 break;
997 default:
998 ret = !!test_bit(i, score->scorebits);
999 }
1000 goto out;
1001 }
1002
1003 switch (i) {
1004 case IPV6_SADDR_RULE_INIT:
1005 /* Rule 0: remember if hiscore is not ready yet */
1006 ret = !!score->ifa;
1007 break;
1008 case IPV6_SADDR_RULE_LOCAL:
1009 /* Rule 1: Prefer same address */
1010 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1011 break;
1012 case IPV6_SADDR_RULE_SCOPE:
1013 /* Rule 2: Prefer appropriate scope
1014 *
1015 * ret
1016 * ^
1017 * -1 | d 15
1018 * ---+--+-+---> scope
1019 * |
1020 * | d is scope of the destination.
1021 * B-d | \
1022 * | \ <- smaller scope is better if
1023 * B-15 | \ if scope is enough for destinaion.
1024 * | ret = B - scope (-1 <= scope >= d <= 15).
1025 * d-C-1 | /
1026 * |/ <- greater is better
1027 * -C / if scope is not enough for destination.
1028 * /| ret = scope - C (-1 <= d < scope <= 15).
1029 *
1030 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1031 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1032 * Assume B = 0 and we get C > 29.
1033 */
1034 ret = __ipv6_addr_src_scope(score->addr_type);
1035 if (ret >= dst->scope)
1036 ret = -ret;
1037 else
1038 ret -= 128; /* 30 is enough */
1039 score->scopedist = ret;
1040 break;
1041 case IPV6_SADDR_RULE_PREFERRED:
1042 /* Rule 3: Avoid deprecated and optimistic addresses */
1043 ret = ipv6_saddr_preferred(score->addr_type) ||
1044 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1045 break;
1046#ifdef CONFIG_IPV6_MIP6
1047 case IPV6_SADDR_RULE_HOA:
7cbca67c 1048 {
a9b05723 1049 /* Rule 4: Prefer home address */
7cbca67c
YH		 1050 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1051 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1052 break;
7cbca67c 1053 }
a9b05723
YH		 1054#endif
1055 case IPV6_SADDR_RULE_OIF:
1056 /* Rule 5: Prefer outgoing interface */
1057 ret = (!dst->ifindex ||
1058 dst->ifindex == score->ifa->idev->dev->ifindex);
1059 break;
1060 case IPV6_SADDR_RULE_LABEL:
1061 /* Rule 6: Prefer matching label */
3de23255
BT		 1062 ret = ipv6_addr_label(net,
1063 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1064 score->ifa->idev->dev->ifindex) == dst->label;
1065 break;
1066#ifdef CONFIG_IPV6_PRIVACY
1067 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1068 {
a9b05723
YH		 1069 /* Rule 7: Prefer public address
1070 * Note: prefer temprary address if use_tempaddr >= 2
1071 */
7cbca67c
YH		 1072 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1073 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1074 score->ifa->idev->cnf.use_tempaddr >= 2;
1075 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1076 break;
7cbca67c 1077 }
a9b05723
YH		 1078#endif
1079 case IPV6_SADDR_RULE_ORCHID:
1080 /* Rule 8-: Prefer ORCHID vs ORCHID or
1081 * non-ORCHID vs non-ORCHID
1082 */
1083 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1084 ipv6_addr_orchid(dst->addr));
1085 break;
1086 case IPV6_SADDR_RULE_PREFIX:
1087 /* Rule 8: Use longest matching prefix */
1088 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1089 dst->addr);
1090 break;
1091 default:
1092 ret = 0;
1093 }
1094
1095 if (ret)
1096 __set_bit(i, score->scorebits);
1097 score->rule = i;
1098out:
1099 return ret;
1100}
1101
191cd582 1102int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
9acd9f3a 1103 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1104 struct in6_addr *saddr)
1da177e4 1105{
a9b05723
YH		 1106 struct ipv6_saddr_score scores[2],
1107 *score = &scores[0], *hiscore = &scores[1];
a9b05723 1108 struct ipv6_saddr_dst dst;
072047e4 1109 struct net_device *dev;
a9b05723 1110 int dst_type;
1da177e4 1111
a9b05723
YH		 1112 dst_type = __ipv6_addr_type(daddr);
1113 dst.addr = daddr;
1114 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1115 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1116 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1117 dst.prefs = prefs;
a9b05723
YH		 1118
1119 hiscore->rule = -1;
1120 hiscore->ifa = NULL;
1da177e4 1121
8814c4b5 1122 rcu_read_lock();
1da177e4 1123
c6d14c84 1124 for_each_netdev_rcu(net, dev) {
072047e4 1125 struct inet6_dev *idev;
072047e4 1126
a9b05723 1127 /* Candidate Source Address (section 4)
072047e4
YH		 1128 * - multicast and link-local destination address,
1129 * the set of candidate source address MUST only
1130 * include addresses assigned to interfaces
1131 * belonging to the same link as the outgoing
1132 * interface.
1133 * (- For site-local destination addresses, the
1134 * set of candidate source addresses MUST only
1135 * include addresses assigned to interfaces
1136 * belonging to the same site as the outgoing
1137 * interface.)
1138 */
a9b05723
YH		 1139 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1140 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1141 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1142 continue;
1da177e4 1143
1da177e4 1144 idev = __in6_dev_get(dev);
072047e4
YH		 1145 if (!idev)
1146 continue;
1147
1148 read_lock_bh(&idev->lock);
a9b05723
YH		 1149 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1150 int i;
072047e4 1151
a9b05723 1152 /*
6b3ae80a
YH		 1153 * - Tentative Address (RFC2462 section 5.4)
1154 * - A tentative address is not considered
1155 * "assigned to an interface" in the traditional
95c385b4 1156 * sense, unless it is also flagged as optimistic.
6b3ae80a 1157 * - Candidate Source Address (section 4)
072047e4
YH		 1158 * - In any case, anycast addresses, multicast
1159 * addresses, and the unspecified address MUST
1160 * NOT be included in a candidate set.
1161 */
a9b05723
YH		 1162 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1163 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1164 continue;
a9b05723
YH		 1165
1166 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1167
1168 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1169 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1170 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1171 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1172 "assigned as unicast address on %s",
1173 dev->name);
1174 continue;
1175 }
1176
a9b05723
YH		 1177 score->rule = -1;
1178 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1179
1180 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1181 int minihiscore, miniscore;
1182
3de23255
BT		 1183 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1184 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1185
1186 if (minihiscore > miniscore) {
1187 if (i == IPV6_SADDR_RULE_SCOPE &&
1188 score->scopedist > 0) {
1189 /*
1190 * special case:
1191 * each remaining entry
1192 * has too small (not enough)
1193 * scope, because ifa entries
1194 * are sorted by their scope
1195 * values.
1196 */
1197 goto try_nextdev;
1198 }
1199 break;
1200 } else if (minihiscore < miniscore) {
a9b05723
YH		 1201 if (hiscore->ifa)
1202 in6_ifa_put(hiscore->ifa);
1203
1204 in6_ifa_hold(score->ifa);
1205
a0bffffc 1206 swap(hiscore, score);
a9b05723
YH		 1207
1208 /* restore our iterator */
1209 score->ifa = hiscore->ifa;
1210
1211 break;
1da177e4 1212 }
072047e4 1213 }
1da177e4 1214 }
a9b05723 1215try_nextdev:
072047e4 1216 read_unlock_bh(&idev->lock);
1da177e4 1217 }
8814c4b5 1218 rcu_read_unlock();
1da177e4 1219
a9b05723 1220 if (!hiscore->ifa)
072047e4 1221 return -EADDRNOTAVAIL;
1ab1457c 1222
a9b05723
YH		 1223 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1224 in6_ifa_put(hiscore->ifa);
072047e4 1225 return 0;
1da177e4
LT		 1226}
1227
5e5f3f0f 1228EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1229
95c385b4
NH		 1230int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1231 unsigned char banned_flags)
1da177e4
LT		 1232{
1233 struct inet6_dev *idev;
1234 int err = -EADDRNOTAVAIL;
1235
8814c4b5 1236 rcu_read_lock();
1da177e4
LT		 1237 if ((idev = __in6_dev_get(dev)) != NULL) {
1238 struct inet6_ifaddr *ifp;
1239
1240 read_lock_bh(&idev->lock);
1241 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1242 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1243 ipv6_addr_copy(addr, &ifp->addr);
1244 err = 0;
1245 break;
1246 }
1247 }
1248 read_unlock_bh(&idev->lock);
1249 }
8814c4b5 1250 rcu_read_unlock();
1da177e4
LT		 1251 return err;
1252}
1253
1254static int ipv6_count_addresses(struct inet6_dev *idev)
1255{
1256 int cnt = 0;
1257 struct inet6_ifaddr *ifp;
1258
1259 read_lock_bh(&idev->lock);
1260 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1261 cnt++;
1262 read_unlock_bh(&idev->lock);
1263 return cnt;
1264}
1265
bfeade08
DL		 1266int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1267 struct net_device *dev, int strict)
1da177e4 1268{
c2e21293 1269 struct inet6_ifaddr *ifp = NULL;
1270 struct hlist_node *node;
3a88a81d 1271 unsigned int hash = ipv6_addr_hash(addr);
1da177e4 1272
5c578aed 1273 rcu_read_lock_bh();
1274 hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1275 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1276 continue;
1da177e4
LT		 1277 if (ipv6_addr_equal(&ifp->addr, addr) &&
1278 !(ifp->flags&IFA_F_TENTATIVE)) {
1279 if (dev == NULL || ifp->idev->dev == dev ||
1280 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1281 break;
1282 }
1283 }
5c578aed 1284 rcu_read_unlock_bh();
1285
1da177e4
LT		 1286 return ifp != NULL;
1287}
7159039a
YH		 1288EXPORT_SYMBOL(ipv6_chk_addr);
1289
1da177e4 1290static
06bfe655
DL		 1291int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1292 struct net_device *dev)
1da177e4 1293{
c2e21293 1294 struct inet6_ifaddr *ifp;
1295 struct hlist_node *node;
3a88a81d 1296 unsigned int hash = ipv6_addr_hash(addr);
1da177e4 1297
c2e21293 1298 hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1299 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1300 continue;
1da177e4
LT		 1301 if (ipv6_addr_equal(&ifp->addr, addr)) {
1302 if (dev == NULL || ifp->idev->dev == dev)
1303 break;
1304 }
1305 }
1306 return ifp != NULL;
1307}
1308
52eeeb84
YH		 1309int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1310{
1311 struct inet6_dev *idev;
1312 struct inet6_ifaddr *ifa;
1313 int onlink;
1314
1315 onlink = 0;
1316 rcu_read_lock();
1317 idev = __in6_dev_get(dev);
1318 if (idev) {
1319 read_lock_bh(&idev->lock);
1320 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1321 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1322 ifa->prefix_len);
1323 if (onlink)
1324 break;
1325 }
1326 read_unlock_bh(&idev->lock);
1327 }
1328 rcu_read_unlock();
1329 return onlink;
1330}
1331
1332EXPORT_SYMBOL(ipv6_chk_prefix);
1333
9acd9f3a 1334struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1335 struct net_device *dev, int strict)
1da177e4 1336{
c2e21293 1337 struct inet6_ifaddr *ifp = NULL;
1338 struct hlist_node *node;
3a88a81d 1339 unsigned int hash = ipv6_addr_hash(addr);
1da177e4 1340
5c578aed 1341 rcu_read_lock_bh();
1342 hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1343 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1344 continue;
1da177e4
LT		 1345 if (ipv6_addr_equal(&ifp->addr, addr)) {
1346 if (dev == NULL || ifp->idev->dev == dev ||
1347 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1348 in6_ifa_hold(ifp);
1349 break;
1350 }
1351 }
1352 }
5c578aed 1353 rcu_read_unlock_bh();
1da177e4
LT		 1354
1355 return ifp;
1356}
1357
1da177e4
LT		 1358/* Gets referenced address, destroys ifaddr */
1359
cc411d0b 1360static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
1da177e4 1361{
1da177e4
LT		 1362 if (ifp->flags&IFA_F_PERMANENT) {
1363 spin_lock_bh(&ifp->lock);
1364 addrconf_del_timer(ifp);
1365 ifp->flags |= IFA_F_TENTATIVE;
cc411d0b
BH		 1366 if (dad_failed)
1367 ifp->flags |= IFA_F_DADFAILED;
1da177e4 1368 spin_unlock_bh(&ifp->lock);
e2577a06
HX		 1369 if (dad_failed)
1370 ipv6_ifa_notify(0, ifp);
1da177e4
LT		 1371 in6_ifa_put(ifp);
1372#ifdef CONFIG_IPV6_PRIVACY
1373 } else if (ifp->flags&IFA_F_TEMPORARY) {
1374 struct inet6_ifaddr *ifpub;
1375 spin_lock_bh(&ifp->lock);
1376 ifpub = ifp->ifpub;
1377 if (ifpub) {
1378 in6_ifa_hold(ifpub);
1379 spin_unlock_bh(&ifp->lock);
1380 ipv6_create_tempaddr(ifpub, ifp);
1381 in6_ifa_put(ifpub);
1382 } else {
1383 spin_unlock_bh(&ifp->lock);
1384 }
1385 ipv6_del_addr(ifp);
1386#endif
1387 } else
1388 ipv6_del_addr(ifp);
1389}
1390
3c21edbd
YH		 1391void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1392{
1b34be74 1393 struct inet6_dev *idev = ifp->idev;
9bdd8d40
BH		 1394
1395 if (net_ratelimit())
0522fea6
JR		 1396 printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n",
1397 ifp->idev->dev->name, &ifp->addr);
9bdd8d40 1398
1b34be74
YH		 1399 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1400 struct in6_addr addr;
1401
1402 addr.s6_addr32[0] = htonl(0xfe800000);
1403 addr.s6_addr32[1] = 0;
1404
1405 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1406 ipv6_addr_equal(&ifp->addr, &addr)) {
1407 /* DAD failed for link-local based on MAC address */
1408 idev->cnf.disable_ipv6 = 1;
9bdd8d40
BH		 1409
1410 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1411 ifp->idev->dev->name);
1b34be74
YH		 1412 }
1413 }
1414
cc411d0b 1415 addrconf_dad_stop(ifp, 1);
3c21edbd 1416}
1da177e4
LT		 1417
1418/* Join to solicited addr multicast group. */
1419
1420void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1421{
1422 struct in6_addr maddr;
1423
1424 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1425 return;
1426
1427 addrconf_addr_solict_mult(addr, &maddr);
1428 ipv6_dev_mc_inc(dev, &maddr);
1429}
1430
1431void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1432{
1433 struct in6_addr maddr;
1434
1435 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1436 return;
1437
1438 addrconf_addr_solict_mult(addr, &maddr);
1439 __ipv6_dev_mc_dec(idev, &maddr);
1440}
1441
20380731 1442static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1443{
1444 struct in6_addr addr;
1445 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1446 if (ipv6_addr_any(&addr))
1447 return;
1448 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1449}
1450
20380731 1451static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1452{
1453 struct in6_addr addr;
1454 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1455 if (ipv6_addr_any(&addr))
1456 return;
1457 __ipv6_dev_ac_dec(ifp->idev, &addr);
1458}
1459
073a8e0e
YH		 1460static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1461{
1462 if (dev->addr_len != ETH_ALEN)
1463 return -1;
1464 memcpy(eui, dev->dev_addr, 3);
1465 memcpy(eui + 5, dev->dev_addr + 3, 3);
1466
1467 /*
1468 * The zSeries OSA network cards can be shared among various
1469 * OS instances, but the OSA cards have only one MAC address.
1470 * This leads to duplicate address conflicts in conjunction
1471 * with IPv6 if more than one instance uses the same card.
1472 *
1473 * The driver for these cards can deliver a unique 16-bit
1474 * identifier for each instance sharing the same card. It is
1475 * placed instead of 0xFFFE in the interface identifier. The
1476 * "u" bit of the interface identifier is not inverted in this
1477 * case. Hence the resulting interface identifier has local
1478 * scope according to RFC2373.
1479 */
1480 if (dev->dev_id) {
1481 eui[3] = (dev->dev_id >> 8) & 0xFF;
1482 eui[4] = dev->dev_id & 0xFF;
1483 } else {
1484 eui[3] = 0xFF;
1485 eui[4] = 0xFE;
1486 eui[0] ^= 2;
1487 }
1488 return 0;
1489}
1490
1491static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1492{
1493 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1494 if (dev->addr_len != ARCNET_ALEN)
1495 return -1;
1496 memset(eui, 0, 7);
1497 eui[7] = *(u8*)dev->dev_addr;
1498 return 0;
1499}
1500
1501static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1502{
1503 if (dev->addr_len != INFINIBAND_ALEN)
1504 return -1;
1505 memcpy(eui, dev->dev_addr + 12, 8);
1506 eui[0] |= 2;
1507 return 0;
1508}
1509
dfd982ba
YH		 1510int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1511{
9af28511
SH		 1512 if (addr == 0)
1513 return -1;
dfd982ba
YH		 1514 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1515 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1516 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1517 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1518 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1519 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1520 eui[1] = 0;
1521 eui[2] = 0x5E;
1522 eui[3] = 0xFE;
1523 memcpy(eui + 4, &addr, 4);
1524 return 0;
1525}
1526EXPORT_SYMBOL(__ipv6_isatap_ifid);
1527
1528static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1529{
1530 if (dev->priv_flags & IFF_ISATAP)
1531 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1532 return -1;
1533}
1534
1da177e4
LT		 1535static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1536{
1537 switch (dev->type) {
1538 case ARPHRD_ETHER:
1539 case ARPHRD_FDDI:
1540 case ARPHRD_IEEE802_TR:
073a8e0e 1541 return addrconf_ifid_eui48(eui, dev);
1da177e4 1542 case ARPHRD_ARCNET:
073a8e0e 1543 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1544 case ARPHRD_INFINIBAND:
073a8e0e 1545 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1546 case ARPHRD_SIT:
dfd982ba 1547 return addrconf_ifid_sit(eui, dev);
1da177e4
LT		 1548 }
1549 return -1;
1550}
1551
1552static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1553{
1554 int err = -1;
1555 struct inet6_ifaddr *ifp;
1556
1557 read_lock_bh(&idev->lock);
1558 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1559 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1560 memcpy(eui, ifp->addr.s6_addr+8, 8);
1561 err = 0;
1562 break;
1563 }
1564 }
1565 read_unlock_bh(&idev->lock);
1566 return err;
1567}
1568
1569#ifdef CONFIG_IPV6_PRIVACY
1570/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1571static int __ipv6_regen_rndid(struct inet6_dev *idev)
1572{
1da177e4 1573regen:
955189ef 1574 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1575 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1576
1577 /*
1578 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1579 * check if generated address is not inappropriate
1580 *
1581 * - Reserved subnet anycast (RFC 2526)
1582 * 11111101 11....11 1xxxxxxx
c7dc89c0 1583 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1584 * 00-00-5E-FE-xx-xx-xx-xx
1585 * - value 0
1586 * - XXX: already assigned to an address on the device
1587 */
1ab1457c 1588 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1589 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1590 (idev->rndid[7]&0x80))
1591 goto regen;
1592 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1593 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1594 goto regen;
1595 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1596 goto regen;
1597 }
1598
1599 return 0;
1600}
1601
1602static void ipv6_regen_rndid(unsigned long data)
1603{
1604 struct inet6_dev *idev = (struct inet6_dev *) data;
1605 unsigned long expires;
1606
8814c4b5 1607 rcu_read_lock_bh();
1da177e4
LT		 1608 write_lock_bh(&idev->lock);
1609
1610 if (idev->dead)
1611 goto out;
1612
1613 if (__ipv6_regen_rndid(idev) < 0)
1614 goto out;
1ab1457c 1615
1da177e4 1616 expires = jiffies +
1ab1457c 1617 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1618 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1619 if (time_before(expires, jiffies)) {
1620 printk(KERN_WARNING
1621 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1622 idev->dev->name);
1623 goto out;
1624 }
1625
1626 if (!mod_timer(&idev->regen_timer, expires))
1627 in6_dev_hold(idev);
1628
1629out:
1630 write_unlock_bh(&idev->lock);
8814c4b5 1631 rcu_read_unlock_bh();
1da177e4
LT		 1632 in6_dev_put(idev);
1633}
1634
1635static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1636 int ret = 0;
1637
1638 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1639 ret = __ipv6_regen_rndid(idev);
1640 return ret;
1641}
1642#endif
1643
1644/*
1645 * Add prefix route.
1646 */
1647
1648static void
1649addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1650 unsigned long expires, u32 flags)
1da177e4 1651{
86872cb5
TG		 1652 struct fib6_config cfg = {
1653 .fc_table = RT6_TABLE_PREFIX,
1654 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1655 .fc_ifindex = dev->ifindex,
1656 .fc_expires = expires,
1657 .fc_dst_len = plen,
1658 .fc_flags = RTF_UP | flags,
c346dca1 1659 .fc_nlinfo.nl_net = dev_net(dev),
f410a1fb 1660 .fc_protocol = RTPROT_KERNEL,
86872cb5 1661 };
1da177e4 1662
86872cb5 1663 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1664
1665 /* Prevent useless cloning on PtP SIT.
1666 This thing is done here expecting that the whole
1667 class of non-broadcast devices need not cloning.
1668 */
0be669bb 1669#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1670 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1671 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1672#endif
1da177e4 1673
86872cb5 1674 ip6_route_add(&cfg);
1da177e4
LT		 1675}
1676
1677/* Create "default" multicast route to the interface */
1678
1679static void addrconf_add_mroute(struct net_device *dev)
1680{
86872cb5
TG		 1681 struct fib6_config cfg = {
1682 .fc_table = RT6_TABLE_LOCAL,
1683 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1684 .fc_ifindex = dev->ifindex,
1685 .fc_dst_len = 8,
1686 .fc_flags = RTF_UP,
c346dca1 1687 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1688 };
1689
1690 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1691
1692 ip6_route_add(&cfg);
1da177e4
LT		 1693}
1694
0be669bb 1695#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1696static void sit_route_add(struct net_device *dev)
1697{
86872cb5
TG		 1698 struct fib6_config cfg = {
1699 .fc_table = RT6_TABLE_MAIN,
1700 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1701 .fc_ifindex = dev->ifindex,
1702 .fc_dst_len = 96,
1703 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1704 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1705 };
1da177e4
LT		 1706
1707 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1708 ip6_route_add(&cfg);
1da177e4 1709}
0be669bb 1710#endif
1da177e4
LT		 1711
1712static void addrconf_add_lroute(struct net_device *dev)
1713{
1714 struct in6_addr addr;
1715
1716 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1717 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1718}
1719
1720static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1721{
1722 struct inet6_dev *idev;
1723
1724 ASSERT_RTNL();
1725
1726 if ((idev = ipv6_find_idev(dev)) == NULL)
1727 return NULL;
1728
1729 /* Add default multicast route */
1730 addrconf_add_mroute(dev);
1731
1732 /* Add link local route */
1733 addrconf_add_lroute(dev);
1734 return idev;
1735}
1736
1737void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1738{
1739 struct prefix_info *pinfo;
1740 __u32 valid_lft;
1741 __u32 prefered_lft;
1742 int addr_type;
1da177e4 1743 struct inet6_dev *in6_dev;
56d417b1 1744 struct net *net = dev_net(dev);
1da177e4
LT		 1745
1746 pinfo = (struct prefix_info *) opt;
1ab1457c 1747
1da177e4
LT		 1748 if (len < sizeof(struct prefix_info)) {
1749 ADBG(("addrconf: prefix option too short\n"));
1750 return;
1751 }
1ab1457c 1752
1da177e4
LT		 1753 /*
1754 * Validation checks ([ADDRCONF], page 19)
1755 */
1756
1757 addr_type = ipv6_addr_type(&pinfo->prefix);
1758
1759 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1760 return;
1761
1762 valid_lft = ntohl(pinfo->valid);
1763 prefered_lft = ntohl(pinfo->prefered);
1764
1765 if (prefered_lft > valid_lft) {
1766 if (net_ratelimit())
1767 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1768 return;
1769 }
1770
1771 in6_dev = in6_dev_get(dev);
1772
1773 if (in6_dev == NULL) {
1774 if (net_ratelimit())
1775 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1776 return;
1777 }
1778
1779 /*
1780 * Two things going on here:
1781 * 1) Add routes for on-link prefixes
1782 * 2) Configure prefixes with the auto flag set
1783 */
1784
4bed72e4
YH		 1785 if (pinfo->onlink) {
1786 struct rt6_info *rt;
1787 unsigned long rt_expires;
1788
6f704992
YH		 1789 /* Avoid arithmetic overflow. Really, we could
1790 * save rt_expires in seconds, likely valid_lft,
1791 * but it would require division in fib gc, that it
1792 * not good.
1793 */
4bed72e4
YH		 1794 if (HZ > USER_HZ)
1795 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1796 else
1797 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1798
4bed72e4
YH		 1799 if (addrconf_finite_timeout(rt_expires))
1800 rt_expires *= HZ;
1da177e4 1801
56d417b1 1802 rt = rt6_lookup(net, &pinfo->prefix, NULL,
6fda7350 1803 dev->ifindex, 1);
1da177e4 1804
2b5ead46 1805 if (rt && addrconf_is_prefix_route(rt)) {
6f704992
YH		 1806 /* Autoconf prefix route */
1807 if (valid_lft == 0) {
1808 ip6_del_rt(rt);
1809 rt = NULL;
4bed72e4 1810 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1811 /* not infinity */
1812 rt->rt6i_expires = jiffies + rt_expires;
1813 rt->rt6i_flags |= RTF_EXPIRES;
1814 } else {
1815 rt->rt6i_flags &= ~RTF_EXPIRES;
1816 rt->rt6i_expires = 0;
1da177e4
LT		 1817 }
1818 } else if (valid_lft) {
6f704992 1819 clock_t expires = 0;
4bed72e4
YH		 1820 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1821 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1822 /* not infinity */
1823 flags |= RTF_EXPIRES;
1824 expires = jiffies_to_clock_t(rt_expires);
1825 }
1da177e4 1826 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1827 dev, expires, flags);
1da177e4
LT		 1828 }
1829 if (rt)
1830 dst_release(&rt->u.dst);
1831 }
1832
1833 /* Try to figure out our local address for this prefix */
1834
1835 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1836 struct inet6_ifaddr * ifp;
1837 struct in6_addr addr;
1838 int create = 0, update_lft = 0;
1839
1840 if (pinfo->prefix_len == 64) {
1841 memcpy(&addr, &pinfo->prefix, 8);
1842 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1843 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1844 in6_dev_put(in6_dev);
1845 return;
1846 }
1847 goto ok;
1848 }
1849 if (net_ratelimit())
1850 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1851 pinfo->prefix_len);
1852 in6_dev_put(in6_dev);
1853 return;
1854
1855ok:
1856
53b7997f 1857 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1da177e4
LT		 1858
1859 if (ifp == NULL && valid_lft) {
1860 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1861 u32 addr_flags = 0;
1862
1863#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1864 if (in6_dev->cnf.optimistic_dad &&
53b7997f 1865 !net->ipv6.devconf_all->forwarding)
95c385b4
NH		 1866 addr_flags = IFA_F_OPTIMISTIC;
1867#endif
1da177e4
LT		 1868
1869 /* Do not allow to create too much of autoconfigured
1870 * addresses; this would be too easy way to crash kernel.
1871 */
1872 if (!max_addresses ||
1873 ipv6_count_addresses(in6_dev) < max_addresses)
1874 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1875 addr_type&IPV6_ADDR_SCOPE_MASK,
1876 addr_flags);
1da177e4
LT		 1877
1878 if (!ifp || IS_ERR(ifp)) {
1879 in6_dev_put(in6_dev);
1880 return;
1881 }
1882
1883 update_lft = create = 1;
1884 ifp->cstamp = jiffies;
1885 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1886 }
1887
1888 if (ifp) {
1889 int flags;
1890 unsigned long now;
1891#ifdef CONFIG_IPV6_PRIVACY
1892 struct inet6_ifaddr *ift;
1893#endif
1894 u32 stored_lft;
1895
1896 /* update lifetime (RFC2462 5.5.3 e) */
1897 spin_lock(&ifp->lock);
1898 now = jiffies;
1899 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1900 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1901 else
1902 stored_lft = 0;
1903 if (!update_lft && stored_lft) {
1904 if (valid_lft > MIN_VALID_LIFETIME ||
1905 valid_lft > stored_lft)
1906 update_lft = 1;
1907 else if (stored_lft <= MIN_VALID_LIFETIME) {
1908 /* valid_lft <= stored_lft is always true */
a1ed0526
BH		 1909 /*
1910 * RFC 4862 Section 5.5.3e:
1911 * "Note that the preferred lifetime of
1912 * the corresponding address is always
1913 * reset to the Preferred Lifetime in
1914 * the received Prefix Information
1915 * option, regardless of whether the
1916 * valid lifetime is also reset or
1917 * ignored."
1918 *
1919 * So if the preferred lifetime in
1920 * this advertisement is different
1921 * than what we have stored, but the
1922 * valid lifetime is invalid, just
1923 * reset prefered_lft.
1924 *
1925 * We must set the valid lifetime
1926 * to the stored lifetime since we'll
1927 * be updating the timestamp below,
1928 * else we'll set it back to the
1929 * minumum.
1930 */
1931 if (prefered_lft != ifp->prefered_lft) {
1932 valid_lft = stored_lft;
1933 update_lft = 1;
1934 }
1da177e4
LT		 1935 } else {
1936 valid_lft = MIN_VALID_LIFETIME;
1937 if (valid_lft < prefered_lft)
1938 prefered_lft = valid_lft;
1939 update_lft = 1;
1940 }
1941 }
1942
1943 if (update_lft) {
1944 ifp->valid_lft = valid_lft;
1945 ifp->prefered_lft = prefered_lft;
1946 ifp->tstamp = now;
1947 flags = ifp->flags;
1948 ifp->flags &= ~IFA_F_DEPRECATED;
1949 spin_unlock(&ifp->lock);
1950
1951 if (!(flags&IFA_F_TENTATIVE))
1952 ipv6_ifa_notify(0, ifp);
1953 } else
1954 spin_unlock(&ifp->lock);
1955
1956#ifdef CONFIG_IPV6_PRIVACY
1957 read_lock_bh(&in6_dev->lock);
1958 /* update all temporary addresses in the list */
372e6c8f 1959 list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) {
1da177e4
LT		 1960 /*
1961 * When adjusting the lifetimes of an existing
1962 * temporary address, only lower the lifetimes.
1963 * Implementations must not increase the
1964 * lifetimes of an existing temporary address
1965 * when processing a Prefix Information Option.
1966 */
c6fbfac2
BB		 1967 if (ifp != ift->ifpub)
1968 continue;
1969
1da177e4
LT		 1970 spin_lock(&ift->lock);
1971 flags = ift->flags;
1972 if (ift->valid_lft > valid_lft &&
1973 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1974 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1975 if (ift->prefered_lft > prefered_lft &&
1976 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1977 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1978 spin_unlock(&ift->lock);
1979 if (!(flags&IFA_F_TENTATIVE))
1980 ipv6_ifa_notify(0, ift);
1981 }
1982
1983 if (create && in6_dev->cnf.use_tempaddr > 0) {
1984 /*
1985 * When a new public address is created as described in [ADDRCONF],
1986 * also create a new temporary address.
1987 */
1ab1457c 1988 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1989 ipv6_create_tempaddr(ifp, NULL);
1990 } else {
1991 read_unlock_bh(&in6_dev->lock);
1992 }
1993#endif
1994 in6_ifa_put(ifp);
1995 addrconf_verify(0);
1996 }
1997 }
1998 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1999 in6_dev_put(in6_dev);
2000}
2001
2002/*
2003 * Set destination address.
2004 * Special case for SIT interfaces where we create a new "virtual"
2005 * device.
2006 */
af284937 2007int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 2008{
2009 struct in6_ifreq ireq;
2010 struct net_device *dev;
2011 int err = -EINVAL;
2012
2013 rtnl_lock();
2014
2015 err = -EFAULT;
2016 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2017 goto err_exit;
2018
af284937 2019 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2020
2021 err = -ENODEV;
2022 if (dev == NULL)
2023 goto err_exit;
2024
0be669bb 2025#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4 2026 if (dev->type == ARPHRD_SIT) {
5bc3eb7e 2027 const struct net_device_ops *ops = dev->netdev_ops;
1da177e4 2028 struct ifreq ifr;
1da177e4
LT		 2029 struct ip_tunnel_parm p;
2030
2031 err = -EADDRNOTAVAIL;
2032 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2033 goto err_exit;
2034
2035 memset(&p, 0, sizeof(p));
2036 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2037 p.iph.saddr = 0;
2038 p.iph.version = 4;
2039 p.iph.ihl = 5;
2040 p.iph.protocol = IPPROTO_IPV6;
2041 p.iph.ttl = 64;
d20b3109 2042 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4 2043
5bc3eb7e
SH		 2044 if (ops->ndo_do_ioctl) {
2045 mm_segment_t oldfs = get_fs();
2046
2047 set_fs(KERNEL_DS);
2048 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2049 set_fs(oldfs);
2050 } else
2051 err = -EOPNOTSUPP;
1da177e4
LT		 2052
2053 if (err == 0) {
2054 err = -ENOBUFS;
af284937
DL		 2055 dev = __dev_get_by_name(net, p.name);
2056 if (!dev)
1da177e4
LT		 2057 goto err_exit;
2058 err = dev_open(dev);
2059 }
2060 }
0be669bb 2061#endif
1da177e4
LT		 2062
2063err_exit:
2064 rtnl_unlock();
2065 return err;
2066}
2067
2068/*
2069 * Manual configuration of address on an interface
2070 */
af284937 2071static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2072 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2073 __u32 valid_lft)
1da177e4
LT		 2074{
2075 struct inet6_ifaddr *ifp;
2076 struct inet6_dev *idev;
2077 struct net_device *dev;
2078 int scope;
6f704992
YH		 2079 u32 flags;
2080 clock_t expires;
4bed72e4 2081 unsigned long timeout;
1da177e4
LT		 2082
2083 ASSERT_RTNL();
1ab1457c 2084
24ef0da7
TG		 2085 if (plen > 128)
2086 return -EINVAL;
2087
0778769d
NT		 2088 /* check the lifetime */
2089 if (!valid_lft || prefered_lft > valid_lft)
2090 return -EINVAL;
2091
af284937
DL		 2092 dev = __dev_get_by_index(net, ifindex);
2093 if (!dev)
1da177e4 2094 return -ENODEV;
1ab1457c 2095
1da177e4
LT		 2096 if ((idev = addrconf_add_dev(dev)) == NULL)
2097 return -ENOBUFS;
2098
2099 scope = ipv6_addr_scope(pfx);
2100
4bed72e4
YH		 2101 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2102 if (addrconf_finite_timeout(timeout)) {
2103 expires = jiffies_to_clock_t(timeout * HZ);
2104 valid_lft = timeout;
6f704992 2105 flags = RTF_EXPIRES;
4bed72e4
YH		 2106 } else {
2107 expires = 0;
2108 flags = 0;
2109 ifa_flags |= IFA_F_PERMANENT;
6f704992 2110 }
0778769d 2111
4bed72e4
YH		 2112 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2113 if (addrconf_finite_timeout(timeout)) {
2114 if (timeout == 0)
2115 ifa_flags |= IFA_F_DEPRECATED;
2116 prefered_lft = timeout;
2117 }
0778769d
NT		 2118
2119 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2120
1da177e4 2121 if (!IS_ERR(ifp)) {
06aebfb7 2122 spin_lock_bh(&ifp->lock);
0778769d
NT		 2123 ifp->valid_lft = valid_lft;
2124 ifp->prefered_lft = prefered_lft;
2125 ifp->tstamp = jiffies;
06aebfb7 2126 spin_unlock_bh(&ifp->lock);
0778769d 2127
46d48046 2128 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2129 expires, flags);
95c385b4
NH		 2130 /*
2131 * Note that section 3.1 of RFC 4429 indicates
2132 * that the Optimistic flag should not be set for
2133 * manually configured addresses
2134 */
1da177e4
LT		 2135 addrconf_dad_start(ifp, 0);
2136 in6_ifa_put(ifp);
0778769d 2137 addrconf_verify(0);
1da177e4
LT		 2138 return 0;
2139 }
2140
2141 return PTR_ERR(ifp);
2142}
2143
af284937 2144static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2145 unsigned int plen)
1da177e4
LT		 2146{
2147 struct inet6_ifaddr *ifp;
2148 struct inet6_dev *idev;
2149 struct net_device *dev;
1ab1457c 2150
24ef0da7
TG		 2151 if (plen > 128)
2152 return -EINVAL;
2153
af284937
DL		 2154 dev = __dev_get_by_index(net, ifindex);
2155 if (!dev)
1da177e4
LT		 2156 return -ENODEV;
2157
2158 if ((idev = __in6_dev_get(dev)) == NULL)
2159 return -ENXIO;
2160
2161 read_lock_bh(&idev->lock);
2162 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2163 if (ifp->prefix_len == plen &&
2164 ipv6_addr_equal(pfx, &ifp->addr)) {
2165 in6_ifa_hold(ifp);
2166 read_unlock_bh(&idev->lock);
1ab1457c 2167
1da177e4
LT		 2168 ipv6_del_addr(ifp);
2169
2170 /* If the last address is deleted administratively,
2171 disable IPv6 on this interface.
2172 */
2173 if (idev->addr_list == NULL)
2174 addrconf_ifdown(idev->dev, 1);
2175 return 0;
2176 }
2177 }
2178 read_unlock_bh(&idev->lock);
2179 return -EADDRNOTAVAIL;
2180}
2181
2182
af284937 2183int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2184{
2185 struct in6_ifreq ireq;
2186 int err;
1ab1457c 2187
1da177e4
LT		 2188 if (!capable(CAP_NET_ADMIN))
2189 return -EPERM;
1ab1457c 2190
1da177e4
LT		 2191 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2192 return -EFAULT;
2193
2194 rtnl_lock();
af284937
DL		 2195 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2196 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2197 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2198 rtnl_unlock();
2199 return err;
2200}
2201
af284937 2202int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2203{
2204 struct in6_ifreq ireq;
2205 int err;
1ab1457c 2206
1da177e4
LT		 2207 if (!capable(CAP_NET_ADMIN))
2208 return -EPERM;
2209
2210 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2211 return -EFAULT;
2212
2213 rtnl_lock();
af284937
DL		 2214 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2215 ireq.ifr6_prefixlen);
1da177e4
LT		 2216 rtnl_unlock();
2217 return err;
2218}
2219
b5f348e5
IJ		 2220static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2221 int plen, int scope)
2222{
2223 struct inet6_ifaddr *ifp;
2224
2225 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2226 if (!IS_ERR(ifp)) {
2227 spin_lock_bh(&ifp->lock);
2228 ifp->flags &= ~IFA_F_TENTATIVE;
2229 spin_unlock_bh(&ifp->lock);
2230 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2231 in6_ifa_put(ifp);
2232 }
2233}
2234
0be669bb 2235#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2236static void sit_add_v4_addrs(struct inet6_dev *idev)
2237{
1da177e4
LT		 2238 struct in6_addr addr;
2239 struct net_device *dev;
c346dca1 2240 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2241 int scope;
2242
2243 ASSERT_RTNL();
2244
2245 memset(&addr, 0, sizeof(struct in6_addr));
2246 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2247
2248 if (idev->dev->flags&IFF_POINTOPOINT) {
2249 addr.s6_addr32[0] = htonl(0xfe800000);
2250 scope = IFA_LINK;
2251 } else {
2252 scope = IPV6_ADDR_COMPATv4;
2253 }
2254
2255 if (addr.s6_addr32[3]) {
b5f348e5 2256 add_addr(idev, &addr, 128, scope);
1da177e4
LT		 2257 return;
2258 }
2259
6fda7350 2260 for_each_netdev(net, dev) {
e5ed6399 2261 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2262 if (in_dev && (dev->flags & IFF_UP)) {
2263 struct in_ifaddr * ifa;
2264
2265 int flag = scope;
2266
2267 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2268 int plen;
2269
2270 addr.s6_addr32[3] = ifa->ifa_local;
2271
2272 if (ifa->ifa_scope == RT_SCOPE_LINK)
2273 continue;
2274 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2275 if (idev->dev->flags&IFF_POINTOPOINT)
2276 continue;
2277 flag |= IFA_HOST;
2278 }
2279 if (idev->dev->flags&IFF_POINTOPOINT)
2280 plen = 64;
2281 else
2282 plen = 96;
2283
b5f348e5 2284 add_addr(idev, &addr, plen, flag);
1da177e4
LT		 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;
1da177e4
LT		 2294
2295 /* ::1 */
2296
2297 ASSERT_RTNL();
2298
2299 if ((idev = ipv6_find_idev(dev)) == NULL) {
2300 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2301 return;
2302 }
2303
b5f348e5 2304 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
1da177e4
LT		 2305}
2306
2307static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2308{
2309 struct inet6_ifaddr * ifp;
95c385b4
NH		 2310 u32 addr_flags = IFA_F_PERMANENT;
2311
2312#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2313 if (idev->cnf.optimistic_dad &&
702beb87 2314 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
95c385b4
NH		 2315 addr_flags |= IFA_F_OPTIMISTIC;
2316#endif
1da177e4 2317
95c385b4
NH		 2318
2319 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2320 if (!IS_ERR(ifp)) {
46d48046 2321 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2322 addrconf_dad_start(ifp, 0);
2323 in6_ifa_put(ifp);
2324 }
2325}
2326
2327static void addrconf_dev_config(struct net_device *dev)
2328{
2329 struct in6_addr addr;
2330 struct inet6_dev * idev;
2331
2332 ASSERT_RTNL();
2333
74235a25
HX		 2334 if ((dev->type != ARPHRD_ETHER) &&
2335 (dev->type != ARPHRD_FDDI) &&
2336 (dev->type != ARPHRD_IEEE802_TR) &&
2337 (dev->type != ARPHRD_ARCNET) &&
2338 (dev->type != ARPHRD_INFINIBAND)) {
2339 /* Alas, we support only Ethernet autoconfiguration. */
2340 return;
2341 }
2342
1da177e4
LT		 2343 idev = addrconf_add_dev(dev);
2344 if (idev == NULL)
2345 return;
2346
2347 memset(&addr, 0, sizeof(struct in6_addr));
2348 addr.s6_addr32[0] = htonl(0xFE800000);
2349
2350 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2351 addrconf_add_linklocal(idev, &addr);
2352}
2353
0be669bb 2354#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2355static void addrconf_sit_config(struct net_device *dev)
2356{
2357 struct inet6_dev *idev;
2358
2359 ASSERT_RTNL();
2360
1ab1457c
YH		 2361 /*
2362 * Configure the tunnel with one of our IPv4
2363 * addresses... we should configure all of
1da177e4
LT		 2364 * our v4 addrs in the tunnel
2365 */
2366
2367 if ((idev = ipv6_find_idev(dev)) == NULL) {
2368 printk(KERN_DEBUG "init sit: add_dev failed\n");
2369 return;
2370 }
2371
c7dc89c0
FT		 2372 if (dev->priv_flags & IFF_ISATAP) {
2373 struct in6_addr addr;
2374
2375 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2376 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2377 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2378 addrconf_add_linklocal(idev, &addr);
2379 return;
2380 }
2381
1da177e4
LT		 2382 sit_add_v4_addrs(idev);
2383
2384 if (dev->flags&IFF_POINTOPOINT) {
2385 addrconf_add_mroute(dev);
2386 addrconf_add_lroute(dev);
2387 } else
2388 sit_route_add(dev);
2389}
0be669bb 2390#endif
1da177e4
LT		 2391
2392static inline int
2393ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2394{
2395 struct in6_addr lladdr;
2396
95c385b4 2397 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2398 addrconf_add_linklocal(idev, &lladdr);
2399 return 0;
2400 }
2401 return -1;
2402}
2403
2404static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2405{
2406 struct net_device *link_dev;
c346dca1 2407 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2408
2409 /* first try to inherit the link-local address from the link device */
2410 if (idev->dev->iflink &&
6fda7350 2411 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2412 if (!ipv6_inherit_linklocal(idev, link_dev))
2413 return;
2414 }
2415 /* then try to inherit it from any device */
6fda7350 2416 for_each_netdev(net, link_dev) {
1da177e4
LT		 2417 if (!ipv6_inherit_linklocal(idev, link_dev))
2418 return;
2419 }
2420 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2421}
2422
2423/*
2424 * Autoconfigure tunnel with a link-local address so routing protocols,
2425 * DHCPv6, MLD etc. can be run over the virtual link
2426 */
2427
2428static void addrconf_ip6_tnl_config(struct net_device *dev)
2429{
2430 struct inet6_dev *idev;
2431
2432 ASSERT_RTNL();
2433
2434 if ((idev = addrconf_add_dev(dev)) == NULL) {
2435 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2436 return;
2437 }
2438 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2439}
2440
1ab1457c 2441static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2442 void * data)
2443{
2444 struct net_device *dev = (struct net_device *) data;
74235a25 2445 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2446 int run_pending = 0;
b217d616 2447 int err;
1da177e4
LT		 2448
2449 switch(event) {
45ba9dd2 2450 case NETDEV_REGISTER:
74235a25 2451 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2452 idev = ipv6_add_dev(dev);
2453 if (!idev)
b217d616 2454 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2455 }
2456 break;
1da177e4 2457 case NETDEV_UP:
3c21edbd 2458 case NETDEV_CHANGE:
c2edacf8
JV		 2459 if (dev->flags & IFF_SLAVE)
2460 break;
2461
3c21edbd 2462 if (event == NETDEV_UP) {
f24e3d65 2463 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2464 /* device is not ready yet. */
2465 printk(KERN_INFO
2466 "ADDRCONF(NETDEV_UP): %s: "
2467 "link is not ready\n",
2468 dev->name);
2469 break;
2470 }
99081049 2471
d31c7b8f
EP		 2472 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2473 idev = ipv6_add_dev(dev);
2474
e3ec6cfc 2475 if (idev) {
99081049 2476 idev->if_flags |= IF_READY;
e3ec6cfc
BT		 2477 run_pending = 1;
2478 }
3c21edbd 2479 } else {
f24e3d65 2480 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2481 /* device is still not ready. */
2482 break;
2483 }
2484
2485 if (idev) {
2486 if (idev->if_flags & IF_READY) {
2487 /* device is already configured. */
2488 break;
2489 }
2490 idev->if_flags |= IF_READY;
2491 }
2492
2493 printk(KERN_INFO
2494 "ADDRCONF(NETDEV_CHANGE): %s: "
2495 "link becomes ready\n",
2496 dev->name);
2497
c5e33bdd 2498 run_pending = 1;
3c21edbd
YH		 2499 }
2500
1da177e4 2501 switch(dev->type) {
0be669bb 2502#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2503 case ARPHRD_SIT:
2504 addrconf_sit_config(dev);
2505 break;
0be669bb 2506#endif
1da177e4
LT		 2507 case ARPHRD_TUNNEL6:
2508 addrconf_ip6_tnl_config(dev);
2509 break;
2510 case ARPHRD_LOOPBACK:
2511 init_loopback(dev);
2512 break;
2513
2514 default:
2515 addrconf_dev_config(dev);
2516 break;
3ff50b79 2517 }
1da177e4 2518 if (idev) {
c5e33bdd
YH		 2519 if (run_pending)
2520 addrconf_dad_run(idev);
2521
1da177e4
LT		 2522 /* If the MTU changed during the interface down, when the
2523 interface up, the changed MTU must be reflected in the
2524 idev as well as routers.
2525 */
2526 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2527 rt6_mtu_change(dev, dev->mtu);
2528 idev->cnf.mtu6 = dev->mtu;
2529 }
2530 idev->tstamp = jiffies;
2531 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2532 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2533 stop IPv6 on this interface.
2534 */
2535 if (dev->mtu < IPV6_MIN_MTU)
2536 addrconf_ifdown(dev, event != NETDEV_DOWN);
2537 }
2538 break;
2539
2540 case NETDEV_CHANGEMTU:
d31c7b8f 2541 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2542 rt6_mtu_change(dev, dev->mtu);
2543 idev->cnf.mtu6 = dev->mtu;
2544 break;
2545 }
2546
d31c7b8f
EP		 2547 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2548 idev = ipv6_add_dev(dev);
2549 if (idev)
2550 break;
2551 }
2552
1da177e4
LT		 2553 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2554
2555 case NETDEV_DOWN:
2556 case NETDEV_UNREGISTER:
2557 /*
2558 * Remove all addresses from this interface.
2559 */
2560 addrconf_ifdown(dev, event != NETDEV_DOWN);
2561 break;
3c21edbd 2562
1da177e4 2563 case NETDEV_CHANGENAME:
1da177e4 2564 if (idev) {
5632c515 2565 snmp6_unregister_dev(idev);
408c4768 2566 addrconf_sysctl_unregister(idev);
f52295a9 2567 addrconf_sysctl_register(idev);
b217d616
HX		 2568 err = snmp6_register_dev(idev);
2569 if (err)
2570 return notifier_from_errno(err);
5632c515 2571 }
1da177e4 2572 break;
93d9b7d7
JP		 2573 case NETDEV_PRE_TYPE_CHANGE:
2574 case NETDEV_POST_TYPE_CHANGE:
2575 addrconf_type_change(dev, event);
75c78500 2576 break;
3ff50b79 2577 }
1da177e4
LT		 2578
2579 return NOTIFY_OK;
2580}
2581
2582/*
2583 * addrconf module should be notified of a device going up
2584 */
2585static struct notifier_block ipv6_dev_notf = {
2586 .notifier_call = addrconf_notify,
2587 .priority = 0
2588};
2589
93d9b7d7 2590static void addrconf_type_change(struct net_device *dev, unsigned long event)
75c78500
MS		 2591{
2592 struct inet6_dev *idev;
2593 ASSERT_RTNL();
2594
2595 idev = __in6_dev_get(dev);
2596
93d9b7d7 2597 if (event == NETDEV_POST_TYPE_CHANGE)
75c78500 2598 ipv6_mc_remap(idev);
93d9b7d7 2599 else if (event == NETDEV_PRE_TYPE_CHANGE)
75c78500
MS		 2600 ipv6_mc_unmap(idev);
2601}
2602
1da177e4
LT		 2603static int addrconf_ifdown(struct net_device *dev, int how)
2604{
2605 struct inet6_dev *idev;
8f37ada5 2606 struct inet6_ifaddr *ifa, *keep_list, **bifa;
c346dca1 2607 struct net *net = dev_net(dev);
1da177e4
LT		 2608
2609 ASSERT_RTNL();
2610
f3db4851 2611 rt6_ifdown(net, dev);
1da177e4
LT		 2612 neigh_ifdown(&nd_tbl, dev);
2613
2614 idev = __in6_dev_get(dev);
2615 if (idev == NULL)
2616 return -ENODEV;
2617
2618 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2619 Do not dev_put!
1da177e4 2620 */
439e2385 2621 if (how) {
1da177e4 2622 idev->dead = 1;
8814c4b5
YH		 2623
2624 /* protected by rtnl_lock */
2625 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2626
2627 /* Step 1.5: remove snmp6 entry */
2628 snmp6_unregister_dev(idev);
2629
2630 }
2631
1da177e4
LT		 2632 write_lock_bh(&idev->lock);
2633
2634 /* Step 3: clear flags for stateless addrconf */
439e2385 2635 if (!how)
3c21edbd 2636 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2637
2638 /* Step 4: clear address list */
2639#ifdef CONFIG_IPV6_PRIVACY
439e2385 2640 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2641 in6_dev_put(idev);
2642
2643 /* clear tempaddr list */
372e6c8f 2644 while (!list_empty(&idev->tempaddr_list)) {
2645 ifa = list_first_entry(&idev->tempaddr_list,
2646 struct inet6_ifaddr, tmp_list);
2647 list_del(&ifa->tmp_list);
1da177e4
LT		 2648 ifa->dead = 1;
2649 write_unlock_bh(&idev->lock);
2650 spin_lock_bh(&ifa->lock);
2651
2652 if (ifa->ifpub) {
2653 in6_ifa_put(ifa->ifpub);
2654 ifa->ifpub = NULL;
2655 }
2656 spin_unlock_bh(&ifa->lock);
2657 in6_ifa_put(ifa);
2658 write_lock_bh(&idev->lock);
2659 }
2660#endif
8f37ada5 2661 keep_list = NULL;
2662 bifa = &keep_list;
2663 while ((ifa = idev->addr_list) != NULL) {
2664 idev->addr_list = ifa->if_next;
2665 ifa->if_next = NULL;
2666
84e8b803 2667 addrconf_del_timer(ifa);
2668
2669 /* If just doing link down, and address is permanent
2670 and not link-local, then retain it. */
2671 if (how == 0 &&
2672 (ifa->flags&IFA_F_PERMANENT) &&
2673 !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
8f37ada5 2674
2675 /* Move to holding list */
2676 *bifa = ifa;
dc2b99f7 2677 bifa = &ifa->if_next;
2678
84e8b803 2679 /* If not doing DAD on this address, just keep it. */
2680 if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) ||
2681 idev->cnf.accept_dad <= 0 ||
2682 (ifa->flags & IFA_F_NODAD))
2683 continue;
2684
2685 /* If it was tentative already, no need to notify */
2686 if (ifa->flags & IFA_F_TENTATIVE)
2687 continue;
2688
2689 /* Flag it for later restoration when link comes up */
2690 ifa->flags |= IFA_F_TENTATIVE;
2691 in6_ifa_hold(ifa);
dc2b99f7 2692 } else {
dc2b99f7 2693 ifa->dead = 1;
84e8b803 2694 }
2695 write_unlock_bh(&idev->lock);
1da177e4 2696
c2e21293 2697 /* clear hash table */
5c578aed 2698 spin_lock_bh(&addrconf_hash_lock);
2699 hlist_del_init_rcu(&ifa->addr_lst);
c2e21293 2700 __in6_ifa_put(ifa);
5c578aed 2701 spin_unlock_bh(&addrconf_hash_lock);
c2e21293 2702
84e8b803 2703 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2704 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
2705 in6_ifa_put(ifa);
dc2b99f7 2706
84e8b803 2707 write_lock_bh(&idev->lock);
1da177e4 2708 }
8f37ada5 2709
2710 idev->addr_list = keep_list;
2711
1da177e4
LT		 2712 write_unlock_bh(&idev->lock);
2713
2714 /* Step 5: Discard multicast list */
2715
439e2385 2716 if (how)
1da177e4
LT		 2717 ipv6_mc_destroy_dev(idev);
2718 else
2719 ipv6_mc_down(idev);
2720
1da177e4 2721 idev->tstamp = jiffies;
1ab1457c 2722
1da177e4
LT		 2723 /* Shot the device (if unregistered) */
2724
439e2385 2725 if (how) {
408c4768 2726 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2727 neigh_parms_release(&nd_tbl, idev->nd_parms);
2728 neigh_ifdown(&nd_tbl, dev);
2729 in6_dev_put(idev);
2730 }
2731 return 0;
2732}
2733
2734static void addrconf_rs_timer(unsigned long data)
2735{
2736 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
5b2a1953 2737 struct inet6_dev *idev = ifp->idev;
1da177e4 2738
5b2a1953 2739 read_lock(&idev->lock);
2740 if (idev->dead || !(idev->if_flags & IF_READY))
1da177e4
LT		 2741 goto out;
2742
5b2a1953 2743 if (idev->cnf.forwarding)
2744 goto out;
2745
2746 /* Announcement received after solicitation was sent */
2747 if (idev->if_flags & IF_RA_RCVD)
1da177e4 2748 goto out;
1da177e4
LT		 2749
2750 spin_lock(&ifp->lock);
5b2a1953 2751 if (ifp->probes++ < idev->cnf.rtr_solicits) {
1da177e4
LT		 2752 /* The wait after the last probe can be shorter */
2753 addrconf_mod_timer(ifp, AC_RS,
5b2a1953 2754 (ifp->probes == idev->cnf.rtr_solicits) ?
2755 idev->cnf.rtr_solicit_delay :
2756 idev->cnf.rtr_solicit_interval);
1da177e4
LT		 2757 spin_unlock(&ifp->lock);
2758
5b2a1953 2759 ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2760 } else {
2761 spin_unlock(&ifp->lock);
2762 /*
2763 * Note: we do not support deprecated "all on-link"
2764 * assumption any longer.
2765 */
2766 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
5b2a1953 2767 idev->dev->name);
1da177e4
LT		 2768 }
2769
2770out:
5b2a1953 2771 read_unlock(&idev->lock);
1da177e4
LT		 2772 in6_ifa_put(ifp);
2773}
2774
2775/*
2776 * Duplicate Address Detection
2777 */
3c21edbd
YH		 2778static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2779{
2780 unsigned long rand_num;
2781 struct inet6_dev *idev = ifp->idev;
2782
95c385b4
NH		 2783 if (ifp->flags & IFA_F_OPTIMISTIC)
2784 rand_num = 0;
2785 else
2786 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2787
3c21edbd
YH		 2788 ifp->probes = idev->cnf.dad_transmits;
2789 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2790}
2791
e431b8c0 2792static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2793{
2794 struct inet6_dev *idev = ifp->idev;
2795 struct net_device *dev = idev->dev;
1da177e4
LT		 2796
2797 addrconf_join_solict(dev, &ifp->addr);
2798
1da177e4 2799 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2800
2801 read_lock_bh(&idev->lock);
2802 if (ifp->dead)
2803 goto out;
1da177e4 2804
21809faf 2805 spin_lock(&ifp->lock);
1da177e4 2806 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2807 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2808 !(ifp->flags&IFA_F_TENTATIVE) ||
2809 ifp->flags & IFA_F_NODAD) {
cc411d0b 2810 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2811 spin_unlock(&ifp->lock);
1da177e4
LT		 2812 read_unlock_bh(&idev->lock);
2813
2814 addrconf_dad_completed(ifp);
2815 return;
2816 }
2817
6732bade 2818 if (!(idev->if_flags & IF_READY)) {
21809faf 2819 spin_unlock(&ifp->lock);
6732bade 2820 read_unlock_bh(&idev->lock);
3c21edbd 2821 /*
590a9887 2822 * If the device is not ready:
3c21edbd
YH		 2823 * - keep it tentative if it is a permanent address.
2824 * - otherwise, kill it.
2825 */
2826 in6_ifa_hold(ifp);
cc411d0b 2827 addrconf_dad_stop(ifp, 0);
6732bade 2828 return;
3c21edbd 2829 }
95c385b4
NH		 2830
2831 /*
2832 * Optimistic nodes can start receiving
2833 * Frames right away
2834 */
2835 if(ifp->flags & IFA_F_OPTIMISTIC)
2836 ip6_ins_rt(ifp->rt);
2837
6732bade 2838 addrconf_dad_kick(ifp);
21809faf 2839 spin_unlock(&ifp->lock);
1da177e4
LT		 2840out:
2841 read_unlock_bh(&idev->lock);
2842}
2843
2844static void addrconf_dad_timer(unsigned long data)
2845{
2846 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2847 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2848 struct in6_addr mcaddr;
2849
122e4519 2850 read_lock(&idev->lock);
2851 if (idev->dead || !(idev->if_flags & IF_READY)) {
2852 read_unlock(&idev->lock);
1da177e4
LT		 2853 goto out;
2854 }
21809faf 2855
2856 spin_lock(&ifp->lock);
1da177e4
LT		 2857 if (ifp->probes == 0) {
2858 /*
2859 * DAD was successful
2860 */
2861
cc411d0b 2862 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2863 spin_unlock(&ifp->lock);
122e4519 2864 read_unlock(&idev->lock);
1da177e4
LT		 2865
2866 addrconf_dad_completed(ifp);
2867
2868 goto out;
2869 }
2870
2871 ifp->probes--;
2872 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
21809faf 2873 spin_unlock(&ifp->lock);
122e4519 2874 read_unlock(&idev->lock);
1da177e4
LT		 2875
2876 /* send a neighbour solicitation for our addr */
1da177e4 2877 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 2878 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 2879out:
2880 in6_ifa_put(ifp);
2881}
2882
2883static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2884{
2885 struct net_device * dev = ifp->idev->dev;
2886
2887 /*
2888 * Configure the address for reception. Now it is valid.
2889 */
2890
2891 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2892
2893 /* If added prefix is link local and forwarding is off,
2894 start sending router solicitations.
2895 */
2896
2897 if (ifp->idev->cnf.forwarding == 0 &&
2898 ifp->idev->cnf.rtr_solicits > 0 &&
2899 (dev->flags&IFF_LOOPBACK) == 0 &&
2900 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2901 /*
2902 * If a host as already performed a random delay
2903 * [...] as part of DAD [...] there is no need
2904 * to delay again before sending the first RS
2905 */
f3ee4010 2906 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2907
2908 spin_lock_bh(&ifp->lock);
2909 ifp->probes = 1;
2910 ifp->idev->if_flags |= IF_RS_SENT;
2911 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2912 spin_unlock_bh(&ifp->lock);
2913 }
2914}
2915
c5e33bdd
YH		 2916static void addrconf_dad_run(struct inet6_dev *idev) {
2917 struct inet6_ifaddr *ifp;
2918
2919 read_lock_bh(&idev->lock);
2920 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
21809faf 2921 spin_lock(&ifp->lock);
c5e33bdd 2922 if (!(ifp->flags & IFA_F_TENTATIVE)) {
21809faf 2923 spin_unlock(&ifp->lock);
c5e33bdd
YH		 2924 continue;
2925 }
21809faf 2926 spin_unlock(&ifp->lock);
c5e33bdd
YH		 2927 addrconf_dad_kick(ifp);
2928 }
2929 read_unlock_bh(&idev->lock);
2930}
2931
1da177e4
LT		 2932#ifdef CONFIG_PROC_FS
2933struct if6_iter_state {
3c40090a 2934 struct seq_net_private p;
1da177e4
LT		 2935 int bucket;
2936};
2937
2938static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2939{
2940 struct inet6_ifaddr *ifa = NULL;
2941 struct if6_iter_state *state = seq->private;
1218854a 2942 struct net *net = seq_file_net(seq);
1da177e4
LT		 2943
2944 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
c2e21293 2945 struct hlist_node *n;
5c578aed 2946 hlist_for_each_entry_rcu(ifa, n, &inet6_addr_lst[state->bucket],
2947 addr_lst)
c2e21293 2948 if (net_eq(dev_net(ifa->idev->dev), net))
2949 return ifa;
1da177e4 2950 }
c2e21293 2951 return NULL;
1da177e4
LT		 2952}
2953
c2e21293 2954static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
2955 struct inet6_ifaddr *ifa)
1da177e4
LT		 2956{
2957 struct if6_iter_state *state = seq->private;
1218854a 2958 struct net *net = seq_file_net(seq);
c2e21293 2959 struct hlist_node *n = &ifa->addr_lst;
1da177e4 2960
5c578aed 2961 hlist_for_each_entry_continue_rcu(ifa, n, addr_lst)
c2e21293 2962 if (net_eq(dev_net(ifa->idev->dev), net))
2963 return ifa;
3c40090a 2964
c2e21293 2965 while (++state->bucket < IN6_ADDR_HSIZE) {
2966 hlist_for_each_entry(ifa, n,
2967 &inet6_addr_lst[state->bucket], addr_lst) {
2968 if (net_eq(dev_net(ifa->idev->dev), net))
2969 return ifa;
2970 }
1da177e4 2971 }
3c40090a 2972
c2e21293 2973 return NULL;
1da177e4
LT		 2974}
2975
2976static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2977{
2978 struct inet6_ifaddr *ifa = if6_get_first(seq);
2979
2980 if (ifa)
2981 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2982 --pos;
2983 return pos ? NULL : ifa;
2984}
2985
2986static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
5c578aed 2987 __acquires(rcu)
1da177e4 2988{
5c578aed 2989 rcu_read_lock_bh();
1da177e4
LT		 2990 return if6_get_idx(seq, *pos);
2991}
2992
2993static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2994{
2995 struct inet6_ifaddr *ifa;
2996
2997 ifa = if6_get_next(seq, v);
2998 ++*pos;
2999 return ifa;
3000}
3001
3002static void if6_seq_stop(struct seq_file *seq, void *v)
5c578aed 3003 __releases(rcu)
1da177e4 3004{
5c578aed 3005 rcu_read_unlock_bh();
1da177e4
LT		 3006}
3007
3008static int if6_seq_show(struct seq_file *seq, void *v)
3009{
3010 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
4b7a4274 3011 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
b071195d 3012 &ifp->addr,
1da177e4
LT		 3013 ifp->idev->dev->ifindex,
3014 ifp->prefix_len,
3015 ifp->scope,
3016 ifp->flags,
3017 ifp->idev->dev->name);
3018 return 0;
3019}
3020
56b3d975 3021static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 3022 .start = if6_seq_start,
3023 .next = if6_seq_next,
3024 .show = if6_seq_show,
3025 .stop = if6_seq_stop,
3026};
3027
3028static int if6_seq_open(struct inode *inode, struct file *file)
3029{
3c40090a
DL		 3030 return seq_open_net(inode, file, &if6_seq_ops,
3031 sizeof(struct if6_iter_state));
1da177e4
LT		 3032}
3033
9a32144e 3034static const struct file_operations if6_fops = {
1da177e4
LT		 3035 .owner = THIS_MODULE,
3036 .open = if6_seq_open,
3037 .read = seq_read,
3038 .llseek = seq_lseek,
3c40090a 3039 .release = seq_release_net,
1da177e4
LT		 3040};
3041
2c8c1e72 3042static int __net_init if6_proc_net_init(struct net *net)
1da177e4 3043{
3c40090a 3044 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 3045 return -ENOMEM;
3046 return 0;
3047}
3048
2c8c1e72 3049static void __net_exit if6_proc_net_exit(struct net *net)
3c40090a
DL		 3050{
3051 proc_net_remove(net, "if_inet6");
3052}
3053
3054static struct pernet_operations if6_proc_net_ops = {
3055 .init = if6_proc_net_init,
3056 .exit = if6_proc_net_exit,
3057};
3058
3059int __init if6_proc_init(void)
3060{
3061 return register_pernet_subsys(&if6_proc_net_ops);
3062}
3063
1da177e4
LT		 3064void if6_proc_exit(void)
3065{
3c40090a 3066 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3067}
3068#endif /* CONFIG_PROC_FS */
3069
59fbb3a6 3070#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3071/* Check if address is a home address configured on any interface. */
389f6612 3072int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 3073{
3074 int ret = 0;
c2e21293 3075 struct inet6_ifaddr *ifp = NULL;
3076 struct hlist_node *n;
3a88a81d 3077 unsigned int hash = ipv6_addr_hash(addr);
c2e21293 3078
5c578aed 3079 rcu_read_lock_bh();
3080 hlist_for_each_entry_rcu(ifp, n, &inet6_addr_lst[hash], addr_lst) {
878628fb 3081 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3082 continue;
caad295f 3083 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3084 (ifp->flags & IFA_F_HOMEADDRESS)) {
3085 ret = 1;
3086 break;
3087 }
3088 }
5c578aed 3089 rcu_read_unlock_bh();
3b9f9a1c
NT		 3090 return ret;
3091}
3092#endif
3093
1da177e4
LT		 3094/*
3095 * Periodic address status verification
3096 */
3097
3098static void addrconf_verify(unsigned long foo)
3099{
3100 struct inet6_ifaddr *ifp;
c2e21293 3101 struct hlist_node *node;
1da177e4
LT		 3102 unsigned long now, next;
3103 int i;
3104
5c578aed 3105 rcu_read_lock_bh();
3106 spin_lock(&addrconf_verify_lock);
1da177e4
LT		 3107 now = jiffies;
3108 next = now + ADDR_CHECK_FREQUENCY;
3109
3110 del_timer(&addr_chk_timer);
3111
3112 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3113
3114restart:
5c578aed 3115 hlist_for_each_entry_rcu(ifp, node,
3116 &inet6_addr_lst[i], addr_lst) {
1da177e4
LT		 3117 unsigned long age;
3118#ifdef CONFIG_IPV6_PRIVACY
3119 unsigned long regen_advance;
3120#endif
3121
3122 if (ifp->flags & IFA_F_PERMANENT)
3123 continue;
3124
3125 spin_lock(&ifp->lock);
3126 age = (now - ifp->tstamp) / HZ;
3127
3128#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 3129 regen_advance = ifp->idev->cnf.regen_max_retry *
3130 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 3131 ifp->idev->nd_parms->retrans_time / HZ;
3132#endif
3133
8f27ebb9
YH		 3134 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3135 age >= ifp->valid_lft) {
1da177e4
LT		 3136 spin_unlock(&ifp->lock);
3137 in6_ifa_hold(ifp);
1da177e4
LT		 3138 ipv6_del_addr(ifp);
3139 goto restart;
8f27ebb9
YH		 3140 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3141 spin_unlock(&ifp->lock);
3142 continue;
1da177e4 3143 } else if (age >= ifp->prefered_lft) {
a1ed0526 3144 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
1da177e4
LT		 3145 int deprecate = 0;
3146
3147 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3148 deprecate = 1;
3149 ifp->flags |= IFA_F_DEPRECATED;
3150 }
3151
3152 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3153 next = ifp->tstamp + ifp->valid_lft * HZ;
3154
3155 spin_unlock(&ifp->lock);
3156
3157 if (deprecate) {
3158 in6_ifa_hold(ifp);
1da177e4
LT		 3159
3160 ipv6_ifa_notify(0, ifp);
3161 in6_ifa_put(ifp);
3162 goto restart;
3163 }
3164#ifdef CONFIG_IPV6_PRIVACY
3165 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3166 !(ifp->flags&IFA_F_TENTATIVE)) {
3167 if (age >= ifp->prefered_lft - regen_advance) {
3168 struct inet6_ifaddr *ifpub = ifp->ifpub;
3169 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3170 next = ifp->tstamp + ifp->prefered_lft * HZ;
3171 if (!ifp->regen_count && ifpub) {
3172 ifp->regen_count++;
3173 in6_ifa_hold(ifp);
3174 in6_ifa_hold(ifpub);
3175 spin_unlock(&ifp->lock);
5c578aed 3176
291d809b
HY		 3177 spin_lock(&ifpub->lock);
3178 ifpub->regen_count = 0;
3179 spin_unlock(&ifpub->lock);
1da177e4
LT		 3180 ipv6_create_tempaddr(ifpub, ifp);
3181 in6_ifa_put(ifpub);
3182 in6_ifa_put(ifp);
3183 goto restart;
3184 }
3185 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3186 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3187 spin_unlock(&ifp->lock);
3188#endif
3189 } else {
3190 /* ifp->prefered_lft <= ifp->valid_lft */
3191 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3192 next = ifp->tstamp + ifp->prefered_lft * HZ;
3193 spin_unlock(&ifp->lock);
3194 }
3195 }
1da177e4
LT		 3196 }
3197
3198 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3199 add_timer(&addr_chk_timer);
5c578aed 3200 spin_unlock(&addrconf_verify_lock);
3201 rcu_read_unlock_bh();
1da177e4
LT		 3202}
3203
461d8837
TG		 3204static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3205{
3206 struct in6_addr *pfx = NULL;
3207
3208 if (addr)
3209 pfx = nla_data(addr);
3210
3211 if (local) {
3212 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3213 pfx = NULL;
3214 else
3215 pfx = nla_data(local);
3216 }
3217
3218 return pfx;
3219}
3220
ef7c79ed 3221static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3222 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3223 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3224 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3225};
3226
1da177e4
LT		 3227static int
3228inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3229{
3b1e0a65 3230 struct net *net = sock_net(skb->sk);
b933f716
TG		 3231 struct ifaddrmsg *ifm;
3232 struct nlattr *tb[IFA_MAX+1];
1da177e4 3233 struct in6_addr *pfx;
b933f716 3234 int err;
1da177e4 3235
b933f716
TG		 3236 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3237 if (err < 0)
3238 return err;
3239
3240 ifm = nlmsg_data(nlh);
3241 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3242 if (pfx == NULL)
3243 return -EINVAL;
3244
af284937 3245 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3246}
3247
55ebaef1
NT		 3248static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3249 u32 prefered_lft, u32 valid_lft)
081bba5b 3250{
6f704992
YH		 3251 u32 flags;
3252 clock_t expires;
4bed72e4 3253 unsigned long timeout;
46d48046 3254
081bba5b
NT		 3255 if (!valid_lft || (prefered_lft > valid_lft))
3256 return -EINVAL;
3257
4bed72e4
YH		 3258 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3259 if (addrconf_finite_timeout(timeout)) {
3260 expires = jiffies_to_clock_t(timeout * HZ);
3261 valid_lft = timeout;
6f704992 3262 flags = RTF_EXPIRES;
4bed72e4
YH		 3263 } else {
3264 expires = 0;
3265 flags = 0;
3266 ifa_flags |= IFA_F_PERMANENT;
6f704992 3267 }
081bba5b 3268
4bed72e4
YH		 3269 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3270 if (addrconf_finite_timeout(timeout)) {
3271 if (timeout == 0)
3272 ifa_flags |= IFA_F_DEPRECATED;
3273 prefered_lft = timeout;
3274 }
081bba5b
NT		 3275
3276 spin_lock_bh(&ifp->lock);
3b9f9a1c 3277 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3278 ifp->tstamp = jiffies;
3279 ifp->valid_lft = valid_lft;
3280 ifp->prefered_lft = prefered_lft;
3281
3282 spin_unlock_bh(&ifp->lock);
3283 if (!(ifp->flags&IFA_F_TENTATIVE))
3284 ipv6_ifa_notify(0, ifp);
081bba5b 3285
46d48046 3286 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3287 expires, flags);
081bba5b
NT		 3288 addrconf_verify(0);
3289
3290 return 0;
3291}
3292
1da177e4
LT		 3293static int
3294inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3295{
3b1e0a65 3296 struct net *net = sock_net(skb->sk);
461d8837
TG		 3297 struct ifaddrmsg *ifm;
3298 struct nlattr *tb[IFA_MAX+1];
1da177e4 3299 struct in6_addr *pfx;
7198f8ce
TG		 3300 struct inet6_ifaddr *ifa;
3301 struct net_device *dev;
55ebaef1
NT		 3302 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3303 u8 ifa_flags;
461d8837 3304 int err;
1da177e4 3305
461d8837
TG		 3306 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3307 if (err < 0)
3308 return err;
3309
3310 ifm = nlmsg_data(nlh);
3311 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3312 if (pfx == NULL)
3313 return -EINVAL;
3314
461d8837 3315 if (tb[IFA_CACHEINFO]) {
0778769d 3316 struct ifa_cacheinfo *ci;
461d8837
TG		 3317
3318 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3319 valid_lft = ci->ifa_valid;
461d8837
TG		 3320 preferred_lft = ci->ifa_prefered;
3321 } else {
3322 preferred_lft = INFINITY_LIFE_TIME;
3323 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3324 }
3325
af284937 3326 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3327 if (dev == NULL)
3328 return -ENODEV;
3329
55ebaef1 3330 /* We ignore other flags so far. */
3b9f9a1c 3331 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3332
1cab3da6 3333 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3334 if (ifa == NULL) {
3335 /*
3336 * It would be best to check for !NLM_F_CREATE here but
3337 * userspace alreay relies on not having to provide this.
3338 */
af284937
DL		 3339 return inet6_addr_add(net, ifm->ifa_index, pfx,
3340 ifm->ifa_prefixlen, ifa_flags,
3341 preferred_lft, valid_lft);
081bba5b
NT		 3342 }
3343
7198f8ce
TG		 3344 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3345 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3346 err = -EEXIST;
3347 else
55ebaef1 3348 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3349
3350 in6_ifa_put(ifa);
3351
3352 return err;
1da177e4
LT		 3353}
3354
101bb229
TG		 3355static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3356 u8 scope, int ifindex)
3357{
3358 struct ifaddrmsg *ifm;
3359
3360 ifm = nlmsg_data(nlh);
3361 ifm->ifa_family = AF_INET6;
3362 ifm->ifa_prefixlen = prefixlen;
3363 ifm->ifa_flags = flags;
3364 ifm->ifa_scope = scope;
3365 ifm->ifa_index = ifindex;
3366}
3367
85486af0
TG		 3368static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3369 unsigned long tstamp, u32 preferred, u32 valid)
3370{
3371 struct ifa_cacheinfo ci;
3372
3373 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3374 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3375 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3376 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3377 ci.ifa_prefered = preferred;
3378 ci.ifa_valid = valid;
3379
3380 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3381}
3382
101bb229
TG		 3383static inline int rt_scope(int ifa_scope)
3384{
3385 if (ifa_scope & IFA_HOST)
3386 return RT_SCOPE_HOST;
3387 else if (ifa_scope & IFA_LINK)
3388 return RT_SCOPE_LINK;
3389 else if (ifa_scope & IFA_SITE)
3390 return RT_SCOPE_SITE;
3391 else
3392 return RT_SCOPE_UNIVERSE;
3393}
3394
0ab6803b
TG		 3395static inline int inet6_ifaddr_msgsize(void)
3396{
339bf98f
TG		 3397 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3398 + nla_total_size(16) /* IFA_ADDRESS */
3399 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3400}
c5396a31 3401
1da177e4 3402static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3403 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3404{
1da177e4 3405 struct nlmsghdr *nlh;
85486af0 3406 u32 preferred, valid;
1da177e4 3407
0ab6803b
TG		 3408 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3409 if (nlh == NULL)
26932566 3410 return -EMSGSIZE;
0ab6803b 3411
101bb229
TG		 3412 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3413 ifa->idev->dev->ifindex);
3414
1da177e4 3415 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3416 preferred = ifa->prefered_lft;
3417 valid = ifa->valid_lft;
3418 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3419 long tval = (jiffies - ifa->tstamp)/HZ;
a1faa698
JR		 3420 if (preferred > tval)
3421 preferred -= tval;
3422 else
3423 preferred = 0;
85486af0
TG		 3424 if (valid != INFINITY_LIFE_TIME)
3425 valid -= tval;
1da177e4
LT		 3426 }
3427 } else {
85486af0
TG		 3428 preferred = INFINITY_LIFE_TIME;
3429 valid = INFINITY_LIFE_TIME;
3430 }
3431
0ab6803b 3432 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3433 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3434 nlmsg_cancel(skb, nlh);
3435 return -EMSGSIZE;
3436 }
1da177e4 3437
0ab6803b 3438 return nlmsg_end(skb, nlh);
1da177e4
LT		 3439}
3440
3441static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3442 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3443{
1da177e4 3444 struct nlmsghdr *nlh;
101bb229
TG		 3445 u8 scope = RT_SCOPE_UNIVERSE;
3446 int ifindex = ifmca->idev->dev->ifindex;
3447
3448 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3449 scope = RT_SCOPE_SITE;
1da177e4 3450
0ab6803b
TG		 3451 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3452 if (nlh == NULL)
26932566 3453 return -EMSGSIZE;
85486af0 3454
0ab6803b
TG		 3455 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3456 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3457 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3458 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3459 nlmsg_cancel(skb, nlh);
3460 return -EMSGSIZE;
3461 }
85486af0 3462
0ab6803b 3463 return nlmsg_end(skb, nlh);
1da177e4
LT		 3464}
3465
3466static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3467 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3468{
1da177e4 3469 struct nlmsghdr *nlh;
101bb229
TG		 3470 u8 scope = RT_SCOPE_UNIVERSE;
3471 int ifindex = ifaca->aca_idev->dev->ifindex;
3472
3473 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3474 scope = RT_SCOPE_SITE;
1da177e4 3475
0ab6803b
TG		 3476 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3477 if (nlh == NULL)
26932566 3478 return -EMSGSIZE;
85486af0 3479
0ab6803b
TG		 3480 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3481 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3482 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3483 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3484 nlmsg_cancel(skb, nlh);
3485 return -EMSGSIZE;
3486 }
1da177e4 3487
0ab6803b 3488 return nlmsg_end(skb, nlh);
1da177e4
LT		 3489}
3490
3491enum addr_type_t
3492{
3493 UNICAST_ADDR,
3494 MULTICAST_ADDR,
3495 ANYCAST_ADDR,
3496};
3497
234b27c3
ED		 3498/* called with rcu_read_lock() */
3499static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3500 struct netlink_callback *cb, enum addr_type_t type,
3501 int s_ip_idx, int *p_ip_idx)
3502{
3503 struct inet6_ifaddr *ifa;
3504 struct ifmcaddr6 *ifmca;
3505 struct ifacaddr6 *ifaca;
3506 int err = 1;
3507 int ip_idx = *p_ip_idx;
3508
3509 read_lock_bh(&idev->lock);
3510 switch (type) {
3511 case UNICAST_ADDR:
3512 /* unicast address incl. temp addr */
3513 for (ifa = idev->addr_list; ifa;
3514 ifa = ifa->if_next, ip_idx++) {
3515 if (ip_idx < s_ip_idx)
3516 continue;
3517 err = inet6_fill_ifaddr(skb, ifa,
3518 NETLINK_CB(cb->skb).pid,
3519 cb->nlh->nlmsg_seq,
3520 RTM_NEWADDR,
3521 NLM_F_MULTI);
3522 if (err <= 0)
3523 break;
3524 }
3525 break;
3526 case MULTICAST_ADDR:
3527 /* multicast address */
3528 for (ifmca = idev->mc_list; ifmca;
3529 ifmca = ifmca->next, ip_idx++) {
3530 if (ip_idx < s_ip_idx)
3531 continue;
3532 err = inet6_fill_ifmcaddr(skb, ifmca,
3533 NETLINK_CB(cb->skb).pid,
3534 cb->nlh->nlmsg_seq,
3535 RTM_GETMULTICAST,
3536 NLM_F_MULTI);
3537 if (err <= 0)
3538 break;
3539 }
3540 break;
3541 case ANYCAST_ADDR:
3542 /* anycast address */
3543 for (ifaca = idev->ac_list; ifaca;
3544 ifaca = ifaca->aca_next, ip_idx++) {
3545 if (ip_idx < s_ip_idx)
3546 continue;
3547 err = inet6_fill_ifacaddr(skb, ifaca,
3548 NETLINK_CB(cb->skb).pid,
3549 cb->nlh->nlmsg_seq,
3550 RTM_GETANYCAST,
3551 NLM_F_MULTI);
3552 if (err <= 0)
3553 break;
3554 }
3555 break;
3556 default:
3557 break;
3558 }
3559 read_unlock_bh(&idev->lock);
3560 *p_ip_idx = ip_idx;
3561 return err;
3562}
3563
1da177e4
LT		 3564static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3565 enum addr_type_t type)
3566{
234b27c3
ED		 3567 struct net *net = sock_net(skb->sk);
3568 int h, s_h;
1da177e4
LT		 3569 int idx, ip_idx;
3570 int s_idx, s_ip_idx;
1da177e4 3571 struct net_device *dev;
234b27c3
ED		 3572 struct inet6_dev *idev;
3573 struct hlist_head *head;
3574 struct hlist_node *node;
1ab1457c 3575
234b27c3
ED		 3576 s_h = cb->args[0];
3577 s_idx = idx = cb->args[1];
3578 s_ip_idx = ip_idx = cb->args[2];
5d5619b4 3579
234b27c3
ED		 3580 rcu_read_lock();
3581 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3582 idx = 0;
3583 head = &net->dev_index_head[h];
3584 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3585 if (idx < s_idx)
3586 goto cont;
3587 if (idx > s_idx)
3588 s_ip_idx = 0;
3589 ip_idx = 0;
3590 if ((idev = __in6_dev_get(dev)) == NULL)
3591 goto cont;
3592
3593 if (in6_dump_addrs(idev, skb, cb, type,
3594 s_ip_idx, &ip_idx) <= 0)
3595 goto done;
7562f876 3596cont:
234b27c3
ED		 3597 idx++;
3598 }
1da177e4 3599 }
234b27c3
ED		 3600done:
3601 rcu_read_unlock();
3602 cb->args[0] = h;
3603 cb->args[1] = idx;
3604 cb->args[2] = ip_idx;
3605
1da177e4
LT		 3606 return skb->len;
3607}
3608
3609static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3610{
3611 enum addr_type_t type = UNICAST_ADDR;
b854272b 3612
1da177e4
LT		 3613 return inet6_dump_addr(skb, cb, type);
3614}
3615
3616static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3617{
3618 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3619
1da177e4
LT		 3620 return inet6_dump_addr(skb, cb, type);
3621}
3622
3623
3624static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3625{
3626 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3627
1da177e4
LT		 3628 return inet6_dump_addr(skb, cb, type);
3629}
3630
1b29fc2c
TG		 3631static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3632 void *arg)
6c223828 3633{
3b1e0a65 3634 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3635 struct ifaddrmsg *ifm;
3636 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3637 struct in6_addr *addr = NULL;
3638 struct net_device *dev = NULL;
3639 struct inet6_ifaddr *ifa;
3640 struct sk_buff *skb;
6c223828
NT		 3641 int err;
3642
1b29fc2c
TG		 3643 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3644 if (err < 0)
3645 goto errout;
3646
3647 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3648 if (addr == NULL) {
3649 err = -EINVAL;
3650 goto errout;
6c223828 3651 }
6c223828 3652
1b29fc2c 3653 ifm = nlmsg_data(nlh);
6c223828 3654 if (ifm->ifa_index)
6fda7350 3655 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3656
1cab3da6 3657 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3658 err = -EADDRNOTAVAIL;
3659 goto errout;
3660 }
6c223828 3661
0ab6803b 3662 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3663 err = -ENOBUFS;
1b29fc2c 3664 goto errout_ifa;
6c223828
NT		 3665 }
3666
6c223828
NT		 3667 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3668 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3669 if (err < 0) {
3670 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3671 WARN_ON(err == -EMSGSIZE);
3672 kfree_skb(skb);
3673 goto errout_ifa;
3674 }
6fda7350 3675 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3676errout_ifa:
6c223828 3677 in6_ifa_put(ifa);
1b29fc2c 3678errout:
6c223828 3679 return err;
6c223828
NT		 3680}
3681
1da177e4
LT		 3682static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3683{
3684 struct sk_buff *skb;
c346dca1 3685 struct net *net = dev_net(ifa->idev->dev);
5d620266 3686 int err = -ENOBUFS;
1da177e4 3687
0ab6803b 3688 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3689 if (skb == NULL)
3690 goto errout;
3691
3692 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3693 if (err < 0) {
3694 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3695 WARN_ON(err == -EMSGSIZE);
3696 kfree_skb(skb);
3697 goto errout;
3698 }
1ce85fe4
PNA		 3699 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3700 return;
5d620266
TG		 3701errout:
3702 if (err < 0)
6fda7350 3703 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3704}
3705
b6f99a21 3706static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3707 __s32 *array, int bytes)
3708{
04561c1f
TG		 3709 BUG_ON(bytes < (DEVCONF_MAX * 4));
3710
1da177e4
LT		 3711 memset(array, 0, bytes);
3712 array[DEVCONF_FORWARDING] = cnf->forwarding;
3713 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3714 array[DEVCONF_MTU6] = cnf->mtu6;
3715 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3716 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3717 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3718 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3719 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3720 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3721 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3722 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3723#ifdef CONFIG_IPV6_PRIVACY
3724 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3725 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3726 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3727 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3728 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3729#endif
3730 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3731 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3732 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3733#ifdef CONFIG_IPV6_ROUTER_PREF
3734 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3735 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3736#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3737 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3738#endif
930d6ff2 3739#endif
fbea49e1 3740 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3741 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3742#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3743 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3744#endif
7bc570c8
YH		 3745#ifdef CONFIG_IPV6_MROUTE
3746 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3747#endif
778d80be 3748 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3749 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
c3faca05 3750 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
1da177e4
LT		 3751}
3752
339bf98f
TG		 3753static inline size_t inet6_if_nlmsg_size(void)
3754{
3755 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3756 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3757 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3758 + nla_total_size(4) /* IFLA_MTU */
3759 + nla_total_size(4) /* IFLA_LINK */
3760 + nla_total_size( /* IFLA_PROTINFO */
3761 nla_total_size(4) /* IFLA_INET6_FLAGS */
3762 + nla_total_size(sizeof(struct ifla_cacheinfo))
3763 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3764 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3765 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3766 );
3767}
c5396a31 3768
7d720c3e
TH		 3769static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
3770 int items, int bytes)
7f7d9a6b
HX		 3771{
3772 int i;
3773 int pad = bytes - sizeof(u64) * items;
3774 BUG_ON(pad < 0);
3775
3776 /* Use put_unaligned() because stats may not be aligned for u64. */
3777 put_unaligned(items, &stats[0]);
3778 for (i = 1; i < items; i++)
3779 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3780
3781 memset(&stats[items], 0, pad);
3782}
3783
3784static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3785 int bytes)
3786{
3787 switch(attrtype) {
3788 case IFLA_INET6_STATS:
7d720c3e 3789 __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
7f7d9a6b
HX		 3790 break;
3791 case IFLA_INET6_ICMP6STATS:
7d720c3e 3792 __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
7f7d9a6b
HX		 3793 break;
3794 }
3795}
3796
1ab1457c 3797static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3798 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3799{
04561c1f 3800 struct net_device *dev = idev->dev;
bf99f1bd 3801 struct nlattr *nla;
04561c1f
TG		 3802 struct ifinfomsg *hdr;
3803 struct nlmsghdr *nlh;
3804 void *protoinfo;
3805 struct ifla_cacheinfo ci;
3806
3807 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3808 if (nlh == NULL)
26932566 3809 return -EMSGSIZE;
04561c1f
TG		 3810
3811 hdr = nlmsg_data(nlh);
3812 hdr->ifi_family = AF_INET6;
3813 hdr->__ifi_pad = 0;
3814 hdr->ifi_type = dev->type;
3815 hdr->ifi_index = dev->ifindex;
3816 hdr->ifi_flags = dev_get_flags(dev);
3817 hdr->ifi_change = 0;
3818
3819 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3820
3821 if (dev->addr_len)
04561c1f 3822 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3823
04561c1f 3824 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3825 if (dev->ifindex != dev->iflink)
04561c1f 3826 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3827
04561c1f
TG		 3828 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3829 if (protoinfo == NULL)
3830 goto nla_put_failure;
1da177e4 3831
04561c1f 3832 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3833
1da177e4
LT		 3834 ci.max_reasm_len = IPV6_MAXPLEN;
3835 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3836 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3837 ci.reachable_time = idev->nd_parms->reachable_time;
3838 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3839 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3840
bf99f1bd
YH		 3841 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3842 if (nla == NULL)
04561c1f 3843 goto nla_put_failure;
bf99f1bd 3844 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3845
bf99f1bd
YH		 3846 /* XXX - MC not implemented */
3847
3848 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3849 if (nla == NULL)
3850 goto nla_put_failure;
3851 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3852
3853 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3854 if (nla == NULL)
3855 goto nla_put_failure;
3856 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3857
04561c1f
TG		 3858 nla_nest_end(skb, protoinfo);
3859 return nlmsg_end(skb, nlh);
1da177e4 3860
04561c1f 3861nla_put_failure:
26932566
PM		 3862 nlmsg_cancel(skb, nlh);
3863 return -EMSGSIZE;
1da177e4
LT		 3864}
3865
3866static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3867{
3b1e0a65 3868 struct net *net = sock_net(skb->sk);
84d2697d 3869 int h, s_h;
434a8a58 3870 int idx = 0, s_idx;
1da177e4
LT		 3871 struct net_device *dev;
3872 struct inet6_dev *idev;
84d2697d
ED		 3873 struct hlist_head *head;
3874 struct hlist_node *node;
1da177e4 3875
84d2697d
ED		 3876 s_h = cb->args[0];
3877 s_idx = cb->args[1];
3878
3879 rcu_read_lock();
3880 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3881 idx = 0;
3882 head = &net->dev_index_head[h];
3883 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3884 if (idx < s_idx)
3885 goto cont;
3886 idev = __in6_dev_get(dev);
3887 if (!idev)
3888 goto cont;
3889 if (inet6_fill_ifinfo(skb, idev,
3890 NETLINK_CB(cb->skb).pid,
3891 cb->nlh->nlmsg_seq,
3892 RTM_NEWLINK, NLM_F_MULTI) <= 0)
3893 goto out;
7562f876 3894cont:
84d2697d
ED		 3895 idx++;
3896 }
1da177e4 3897 }
84d2697d
ED		 3898out:
3899 rcu_read_unlock();
3900 cb->args[1] = idx;
3901 cb->args[0] = h;
1da177e4
LT		 3902
3903 return skb->len;
3904}
3905
3906void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3907{
3908 struct sk_buff *skb;
c346dca1 3909 struct net *net = dev_net(idev->dev);
8d7a76c9 3910 int err = -ENOBUFS;
1ab1457c 3911
339bf98f 3912 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3913 if (skb == NULL)
3914 goto errout;
3915
3916 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3917 if (err < 0) {
3918 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3919 WARN_ON(err == -EMSGSIZE);
3920 kfree_skb(skb);
3921 goto errout;
3922 }
1ce85fe4
PNA		 3923 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3924 return;
8d7a76c9
TG		 3925errout:
3926 if (err < 0)
6fda7350 3927 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3928}
3929
339bf98f
TG		 3930static inline size_t inet6_prefix_nlmsg_size(void)
3931{
3932 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3933 + nla_total_size(sizeof(struct in6_addr))
3934 + nla_total_size(sizeof(struct prefix_cacheinfo));
3935}
c5396a31 3936
1da177e4 3937static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3938 struct prefix_info *pinfo, u32 pid, u32 seq,
3939 int event, unsigned int flags)
1da177e4 3940{
6051e2f4
TG		 3941 struct prefixmsg *pmsg;
3942 struct nlmsghdr *nlh;
1da177e4
LT		 3943 struct prefix_cacheinfo ci;
3944
6051e2f4
TG		 3945 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3946 if (nlh == NULL)
26932566 3947 return -EMSGSIZE;
6051e2f4
TG		 3948
3949 pmsg = nlmsg_data(nlh);
1da177e4 3950 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3951 pmsg->prefix_pad1 = 0;
3952 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3953 pmsg->prefix_ifindex = idev->dev->ifindex;
3954 pmsg->prefix_len = pinfo->prefix_len;
3955 pmsg->prefix_type = pinfo->type;
8a47077a 3956 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3957 pmsg->prefix_flags = 0;
3958 if (pinfo->onlink)
3959 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3960 if (pinfo->autoconf)
3961 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3962
6051e2f4 3963 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3964
3965 ci.preferred_time = ntohl(pinfo->prefered);
3966 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3967 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3968
6051e2f4 3969 return nlmsg_end(skb, nlh);
1da177e4 3970
6051e2f4 3971nla_put_failure:
26932566
PM		 3972 nlmsg_cancel(skb, nlh);
3973 return -EMSGSIZE;
1da177e4
LT		 3974}
3975
1ab1457c 3976static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3977 struct prefix_info *pinfo)
3978{
3979 struct sk_buff *skb;
c346dca1 3980 struct net *net = dev_net(idev->dev);
8c384bfa 3981 int err = -ENOBUFS;
1da177e4 3982
339bf98f 3983 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3984 if (skb == NULL)
3985 goto errout;
3986
3987 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3988 if (err < 0) {
3989 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3990 WARN_ON(err == -EMSGSIZE);
3991 kfree_skb(skb);
3992 goto errout;
3993 }
1ce85fe4
PNA		 3994 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
3995 return;
8c384bfa
TG		 3996errout:
3997 if (err < 0)
6fda7350 3998 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3999}
4000
1da177e4
LT		 4001static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4002{
4003 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4004
4005 switch (event) {
4006 case RTM_NEWADDR:
95c385b4
NH		 4007 /*
4008 * If the address was optimistic
4009 * we inserted the route at the start of
4010 * our DAD process, so we don't need
4011 * to do it again
4012 */
4013 if (!(ifp->rt->rt6i_node))
4014 ip6_ins_rt(ifp->rt);
1da177e4
LT		 4015 if (ifp->idev->cnf.forwarding)
4016 addrconf_join_anycast(ifp);
4017 break;
4018 case RTM_DELADDR:
4019 if (ifp->idev->cnf.forwarding)
4020 addrconf_leave_anycast(ifp);
4021 addrconf_leave_solict(ifp->idev, &ifp->addr);
4022 dst_hold(&ifp->rt->u.dst);
e0a1ad73 4023 if (ip6_del_rt(ifp->rt))
1da177e4 4024 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 4025 break;
4026 }
4027}
4028
4029static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4030{
8814c4b5 4031 rcu_read_lock_bh();
1da177e4
LT		 4032 if (likely(ifp->idev->dead == 0))
4033 __ipv6_ifa_notify(event, ifp);
8814c4b5 4034 rcu_read_unlock_bh();
1da177e4
LT		 4035}
4036
4037#ifdef CONFIG_SYSCTL
4038
4039static
8d65af78 4040int addrconf_sysctl_forward(ctl_table *ctl, int write,
1da177e4
LT		 4041 void __user *buffer, size_t *lenp, loff_t *ppos)
4042{
4043 int *valp = ctl->data;
4044 int val = *valp;
88af182e 4045 loff_t pos = *ppos;
1da177e4
LT		 4046 int ret;
4047
8d65af78 4048 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 4049
c8fecf22 4050 if (write)
b325fddb 4051 ret = addrconf_fixup_forwarding(ctl, valp, val);
88af182e
EB		 4052 if (ret)
4053 *ppos = pos;
1ab1457c 4054 return ret;
1da177e4
LT		 4055}
4056
56d417b1
BH		 4057static void dev_disable_change(struct inet6_dev *idev)
4058{
4059 if (!idev || !idev->dev)
4060 return;
4061
4062 if (idev->cnf.disable_ipv6)
4063 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4064 else
4065 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4066}
4067
4068static void addrconf_disable_change(struct net *net, __s32 newf)
4069{
4070 struct net_device *dev;
4071 struct inet6_dev *idev;
4072
c6d14c84
ED		 4073 rcu_read_lock();
4074 for_each_netdev_rcu(net, dev) {
56d417b1
BH		 4075 idev = __in6_dev_get(dev);
4076 if (idev) {
4077 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4078 idev->cnf.disable_ipv6 = newf;
4079 if (changed)
4080 dev_disable_change(idev);
4081 }
56d417b1 4082 }
c6d14c84 4083 rcu_read_unlock();
56d417b1
BH		 4084}
4085
4086static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
4087{
4088 struct net *net;
4089
4090 net = (struct net *)table->extra2;
4091
4092 if (p == &net->ipv6.devconf_dflt->disable_ipv6)
4093 return 0;
4094
88af182e
EB		 4095 if (!rtnl_trylock()) {
4096 /* Restore the original values before restarting */
4097 *p = old;
56d417b1 4098 return restart_syscall();
88af182e 4099 }
56d417b1
BH		 4100
4101 if (p == &net->ipv6.devconf_all->disable_ipv6) {
4102 __s32 newf = net->ipv6.devconf_all->disable_ipv6;
4103 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4104 addrconf_disable_change(net, newf);
4105 } else if ((!*p) ^ (!old))
4106 dev_disable_change((struct inet6_dev *)table->extra1);
4107
4108 rtnl_unlock();
4109 return 0;
4110}
4111
4112static
8d65af78 4113int addrconf_sysctl_disable(ctl_table *ctl, int write,
56d417b1
BH		 4114 void __user *buffer, size_t *lenp, loff_t *ppos)
4115{
4116 int *valp = ctl->data;
4117 int val = *valp;
88af182e 4118 loff_t pos = *ppos;
56d417b1
BH		 4119 int ret;
4120
8d65af78 4121 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
56d417b1
BH		 4122
4123 if (write)
4124 ret = addrconf_disable_ipv6(ctl, valp, val);
88af182e
EB		 4125 if (ret)
4126 *ppos = pos;
56d417b1
BH		 4127 return ret;
4128}
4129
1da177e4
LT		 4130static struct addrconf_sysctl_table
4131{
4132 struct ctl_table_header *sysctl_header;
f6a07b29 4133 ctl_table addrconf_vars[DEVCONF_MAX+1];
1dab6222 4134 char *dev_name;
ab32ea5d 4135} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4136 .sysctl_header = NULL,
4137 .addrconf_vars = {
1ab1457c 4138 {
1da177e4 4139 .procname = "forwarding",
1ab1457c 4140 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 4141 .maxlen = sizeof(int),
4142 .mode = 0644,
6d9f239a 4143 .proc_handler = addrconf_sysctl_forward,
1da177e4
LT		 4144 },
4145 {
1da177e4 4146 .procname = "hop_limit",
1ab1457c 4147 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 4148 .maxlen = sizeof(int),
4149 .mode = 0644,
4150 .proc_handler = proc_dointvec,
4151 },
4152 {
1da177e4
LT		 4153 .procname = "mtu",
4154 .data = &ipv6_devconf.mtu6,
1ab1457c 4155 .maxlen = sizeof(int),
1da177e4 4156 .mode = 0644,
6d9f239a 4157 .proc_handler = proc_dointvec,
1da177e4
LT		 4158 },
4159 {
1da177e4 4160 .procname = "accept_ra",
1ab1457c 4161 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 4162 .maxlen = sizeof(int),
4163 .mode = 0644,
6d9f239a 4164 .proc_handler = proc_dointvec,
1da177e4
LT		 4165 },
4166 {
1da177e4 4167 .procname = "accept_redirects",
1ab1457c 4168 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 4169 .maxlen = sizeof(int),
4170 .mode = 0644,
6d9f239a 4171 .proc_handler = proc_dointvec,
1da177e4
LT		 4172 },
4173 {
1da177e4 4174 .procname = "autoconf",
1ab1457c 4175 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 4176 .maxlen = sizeof(int),
4177 .mode = 0644,
6d9f239a 4178 .proc_handler = proc_dointvec,
1da177e4
LT		 4179 },
4180 {
1da177e4 4181 .procname = "dad_transmits",
1ab1457c 4182 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 4183 .maxlen = sizeof(int),
4184 .mode = 0644,
6d9f239a 4185 .proc_handler = proc_dointvec,
1da177e4
LT		 4186 },
4187 {
1da177e4 4188 .procname = "router_solicitations",
1ab1457c 4189 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 4190 .maxlen = sizeof(int),
4191 .mode = 0644,
6d9f239a 4192 .proc_handler = proc_dointvec,
1da177e4
LT		 4193 },
4194 {
1da177e4 4195 .procname = "router_solicitation_interval",
1ab1457c 4196 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 4197 .maxlen = sizeof(int),
4198 .mode = 0644,
6d9f239a 4199 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4200 },
4201 {
1da177e4 4202 .procname = "router_solicitation_delay",
1ab1457c 4203 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 4204 .maxlen = sizeof(int),
4205 .mode = 0644,
6d9f239a 4206 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4207 },
4208 {
1da177e4 4209 .procname = "force_mld_version",
1ab1457c 4210 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 4211 .maxlen = sizeof(int),
4212 .mode = 0644,
6d9f239a 4213 .proc_handler = proc_dointvec,
1da177e4
LT		 4214 },
4215#ifdef CONFIG_IPV6_PRIVACY
4216 {
1da177e4 4217 .procname = "use_tempaddr",
1ab1457c 4218 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 4219 .maxlen = sizeof(int),
4220 .mode = 0644,
6d9f239a 4221 .proc_handler = proc_dointvec,
1da177e4
LT		 4222 },
4223 {
1da177e4 4224 .procname = "temp_valid_lft",
1ab1457c 4225 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 4226 .maxlen = sizeof(int),
4227 .mode = 0644,
6d9f239a 4228 .proc_handler = proc_dointvec,
1da177e4
LT		 4229 },
4230 {
1da177e4 4231 .procname = "temp_prefered_lft",
1ab1457c 4232 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 4233 .maxlen = sizeof(int),
4234 .mode = 0644,
6d9f239a 4235 .proc_handler = proc_dointvec,
1da177e4
LT		 4236 },
4237 {
1da177e4 4238 .procname = "regen_max_retry",
1ab1457c 4239 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 4240 .maxlen = sizeof(int),
4241 .mode = 0644,
6d9f239a 4242 .proc_handler = proc_dointvec,
1da177e4
LT		 4243 },
4244 {
1da177e4 4245 .procname = "max_desync_factor",
1ab1457c 4246 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 4247 .maxlen = sizeof(int),
4248 .mode = 0644,
6d9f239a 4249 .proc_handler = proc_dointvec,
1da177e4
LT		 4250 },
4251#endif
4252 {
1da177e4
LT		 4253 .procname = "max_addresses",
4254 .data = &ipv6_devconf.max_addresses,
4255 .maxlen = sizeof(int),
4256 .mode = 0644,
6d9f239a 4257 .proc_handler = proc_dointvec,
1da177e4 4258 },
65f5c7c1 4259 {
65f5c7c1 4260 .procname = "accept_ra_defrtr",
1ab1457c 4261 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4262 .maxlen = sizeof(int),
4263 .mode = 0644,
6d9f239a 4264 .proc_handler = proc_dointvec,
65f5c7c1 4265 },
c4fd30eb 4266 {
c4fd30eb 4267 .procname = "accept_ra_pinfo",
1ab1457c 4268 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4269 .maxlen = sizeof(int),
4270 .mode = 0644,
6d9f239a 4271 .proc_handler = proc_dointvec,
c4fd30eb 4272 },
930d6ff2
YH		 4273#ifdef CONFIG_IPV6_ROUTER_PREF
4274 {
930d6ff2
YH		 4275 .procname = "accept_ra_rtr_pref",
4276 .data = &ipv6_devconf.accept_ra_rtr_pref,
4277 .maxlen = sizeof(int),
4278 .mode = 0644,
6d9f239a 4279 .proc_handler = proc_dointvec,
930d6ff2 4280 },
52e16356 4281 {
52e16356
YH		 4282 .procname = "router_probe_interval",
4283 .data = &ipv6_devconf.rtr_probe_interval,
4284 .maxlen = sizeof(int),
4285 .mode = 0644,
6d9f239a 4286 .proc_handler = proc_dointvec_jiffies,
52e16356 4287 },
fa03ef38 4288#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4 4289 {
09c884d4
YH		 4290 .procname = "accept_ra_rt_info_max_plen",
4291 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4292 .maxlen = sizeof(int),
4293 .mode = 0644,
6d9f239a 4294 .proc_handler = proc_dointvec,
09c884d4
YH		 4295 },
4296#endif
930d6ff2 4297#endif
fbea49e1 4298 {
fbea49e1
YH		 4299 .procname = "proxy_ndp",
4300 .data = &ipv6_devconf.proxy_ndp,
4301 .maxlen = sizeof(int),
4302 .mode = 0644,
6d9f239a 4303 .proc_handler = proc_dointvec,
fbea49e1 4304 },
0bcbc926 4305 {
0bcbc926
YH		 4306 .procname = "accept_source_route",
4307 .data = &ipv6_devconf.accept_source_route,
4308 .maxlen = sizeof(int),
4309 .mode = 0644,
6d9f239a 4310 .proc_handler = proc_dointvec,
0bcbc926 4311 },
95c385b4
NH		 4312#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4313 {
95c385b4
NH		 4314 .procname = "optimistic_dad",
4315 .data = &ipv6_devconf.optimistic_dad,
4316 .maxlen = sizeof(int),
4317 .mode = 0644,
6d9f239a 4318 .proc_handler = proc_dointvec,
95c385b4
NH		 4319
4320 },
7bc570c8
YH		 4321#endif
4322#ifdef CONFIG_IPV6_MROUTE
4323 {
7bc570c8
YH		 4324 .procname = "mc_forwarding",
4325 .data = &ipv6_devconf.mc_forwarding,
4326 .maxlen = sizeof(int),
a4e6db07 4327 .mode = 0444,
6d9f239a 4328 .proc_handler = proc_dointvec,
7bc570c8 4329 },
95c385b4 4330#endif
778d80be 4331 {
778d80be
YH		 4332 .procname = "disable_ipv6",
4333 .data = &ipv6_devconf.disable_ipv6,
4334 .maxlen = sizeof(int),
4335 .mode = 0644,
56d417b1 4336 .proc_handler = addrconf_sysctl_disable,
778d80be 4337 },
1b34be74 4338 {
1b34be74
YH		 4339 .procname = "accept_dad",
4340 .data = &ipv6_devconf.accept_dad,
4341 .maxlen = sizeof(int),
4342 .mode = 0644,
6d9f239a 4343 .proc_handler = proc_dointvec,
1b34be74 4344 },
f7734fdf 4345 {
f7734fdf
OP		 4346 .procname = "force_tllao",
4347 .data = &ipv6_devconf.force_tllao,
4348 .maxlen = sizeof(int),
4349 .mode = 0644,
4350 .proc_handler = proc_dointvec
4351 },
1da177e4 4352 {
f8572d8f 4353 /* sentinel */
1da177e4
LT		 4354 }
4355 },
1da177e4
LT		 4356};
4357
bff16c2f 4358static int __addrconf_sysctl_register(struct net *net, char *dev_name,
f8572d8f 4359 struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4360{
4361 int i;
1da177e4 4362 struct addrconf_sysctl_table *t;
1da177e4 4363
1dab6222
PE		 4364#define ADDRCONF_CTL_PATH_DEV 3
4365
4366 struct ctl_path addrconf_ctl_path[] = {
f8572d8f
EB		 4367 { .procname = "net", },
4368 { .procname = "ipv6", },
4369 { .procname = "conf", },
1dab6222
PE		 4370 { /* to be set */ },
4371 { },
4372 };
4373
4374
af879cc7 4375 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4376 if (t == NULL)
f68635e6
PE		 4377 goto out;
4378
1da177e4
LT		 4379 for (i=0; t->addrconf_vars[i].data; i++) {
4380 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4381 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4382 t->addrconf_vars[i].extra2 = net;
1da177e4 4383 }
1da177e4 4384
1ab1457c
YH		 4385 /*
4386 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4387 * by sysctl and we wouldn't want anyone to change it under our feet
4388 * (see SIOCSIFNAME).
1ab1457c 4389 */
1dab6222
PE		 4390 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4391 if (!t->dev_name)
f68635e6 4392 goto free;
1da177e4 4393
1dab6222 4394 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
1da177e4 4395
bff16c2f 4396 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4397 t->addrconf_vars);
1da177e4
LT		 4398 if (t->sysctl_header == NULL)
4399 goto free_procname;
f68635e6
PE		 4400
4401 p->sysctl = t;
95897312 4402 return 0;
1da177e4 4403
f68635e6 4404free_procname:
1dab6222 4405 kfree(t->dev_name);
f68635e6 4406free:
1da177e4 4407 kfree(t);
f68635e6 4408out:
95897312 4409 return -ENOBUFS;
1da177e4
LT		 4410}
4411
408c4768
PE		 4412static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4413{
4414 struct addrconf_sysctl_table *t;
4415
4416 if (p->sysctl == NULL)
4417 return;
4418
4419 t = p->sysctl;
4420 p->sysctl = NULL;
4421 unregister_sysctl_table(t->sysctl_header);
4422 kfree(t->dev_name);
4423 kfree(t);
4424}
4425
f52295a9
PE		 4426static void addrconf_sysctl_register(struct inet6_dev *idev)
4427{
54716e3b 4428 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
f8572d8f 4429 &ndisc_ifinfo_sysctl_change);
c346dca1 4430 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
f8572d8f 4431 idev, &idev->cnf);
f52295a9
PE		 4432}
4433
408c4768 4434static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4435{
408c4768
PE		 4436 __addrconf_sysctl_unregister(&idev->cnf);
4437 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4438}
4439
4440
4441#endif
4442
2c8c1e72 4443static int __net_init addrconf_init_net(struct net *net)
e0da5a48
PE		 4444{
4445 int err;
4446 struct ipv6_devconf *all, *dflt;
4447
4448 err = -ENOMEM;
4449 all = &ipv6_devconf;
4450 dflt = &ipv6_devconf_dflt;
4451
09ad9bc7 4452 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4453 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4454 if (all == NULL)
4455 goto err_alloc_all;
4456
4457 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4458 if (dflt == NULL)
4459 goto err_alloc_dflt;
56d417b1
BH		 4460 } else {
4461 /* these will be inherited by all namespaces */
4462 dflt->autoconf = ipv6_defaults.autoconf;
4463 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
e0da5a48
PE		 4464 }
4465
4466 net->ipv6.devconf_all = all;
4467 net->ipv6.devconf_dflt = dflt;
4468
4469#ifdef CONFIG_SYSCTL
f8572d8f 4470 err = __addrconf_sysctl_register(net, "all", NULL, all);
e0da5a48
PE		 4471 if (err < 0)
4472 goto err_reg_all;
4473
f8572d8f 4474 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
e0da5a48
PE		 4475 if (err < 0)
4476 goto err_reg_dflt;
4477#endif
4478 return 0;
4479
4480#ifdef CONFIG_SYSCTL
4481err_reg_dflt:
4482 __addrconf_sysctl_unregister(all);
4483err_reg_all:
4484 kfree(dflt);
4485#endif
4486err_alloc_dflt:
4487 kfree(all);
4488err_alloc_all:
4489 return err;
4490}
4491
2c8c1e72 4492static void __net_exit addrconf_exit_net(struct net *net)
e0da5a48
PE		 4493{
4494#ifdef CONFIG_SYSCTL
4495 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4496 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4497#endif
09ad9bc7 4498 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4499 kfree(net->ipv6.devconf_dflt);
4500 kfree(net->ipv6.devconf_all);
4501 }
4502}
4503
4504static struct pernet_operations addrconf_ops = {
4505 .init = addrconf_init_net,
4506 .exit = addrconf_exit_net,
4507};
4508
1da177e4
LT		 4509/*
4510 * Device notifier
4511 */
4512
4513int register_inet6addr_notifier(struct notifier_block *nb)
4514{
1ab1457c 4515 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4516}
4517
7159039a
YH		 4518EXPORT_SYMBOL(register_inet6addr_notifier);
4519
1da177e4
LT		 4520int unregister_inet6addr_notifier(struct notifier_block *nb)
4521{
1ab1457c 4522 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4523}
4524
7159039a
YH		 4525EXPORT_SYMBOL(unregister_inet6addr_notifier);
4526
1da177e4
LT		 4527/*
4528 * Init / cleanup code
4529 */
4530
4531int __init addrconf_init(void)
4532{
c2e21293 4533 int i, err;
2a8cc6c8
YH		 4534
4535 if ((err = ipv6_addr_label_init()) < 0) {
4536 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4537 err);
4538 return err;
4539 }
1da177e4 4540
e0da5a48
PE		 4541 register_pernet_subsys(&addrconf_ops);
4542
1da177e4
LT		 4543 /* The addrconf netdev notifier requires that loopback_dev
4544 * has it's ipv6 private information allocated and setup
4545 * before it can bring up and give link-local addresses
4546 * to other devices which are up.
4547 *
4548 * Unfortunately, loopback_dev is not necessarily the first
4549 * entry in the global dev_base list of net devices. In fact,
4550 * it is likely to be the very last entry on that list.
4551 * So this causes the notifier registry below to try and
4552 * give link-local addresses to all devices besides loopback_dev
4553 * first, then loopback_dev, which cases all the non-loopback_dev
4554 * devices to fail to get a link-local address.
4555 *
4556 * So, as a temporary fix, allocate the ipv6 structure for
4557 * loopback_dev first by hand.
4558 * Longer term, all of the dependencies ipv6 has upon the loopback
4559 * device and it being up should be removed.
4560 */
4561 rtnl_lock();
2774c7ab 4562 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4563 err = -ENOMEM;
4564 rtnl_unlock();
4565 if (err)
e0da5a48 4566 goto errlo;
1da177e4 4567
c2e21293 4568 for (i = 0; i < IN6_ADDR_HSIZE; i++)
4569 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
4570
1da177e4
LT		 4571 register_netdevice_notifier(&ipv6_dev_notf);
4572
1da177e4 4573 addrconf_verify(0);
c127ea2c
TG		 4574
4575 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4576 if (err < 0)
4577 goto errout;
4578
4579 /* Only the first call to __rtnl_register can fail */
4580 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4581 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4582 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4583 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4584 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4585
2a8cc6c8
YH		 4586 ipv6_addr_label_rtnl_register();
4587
1da177e4 4588 return 0;
c127ea2c
TG		 4589errout:
4590 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4591errlo:
4592 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4593
4594 return err;
1da177e4
LT		 4595}
4596
09f7709f 4597void addrconf_cleanup(void)
1da177e4 4598{
176c39af 4599 struct net_device *dev;
1da177e4
LT		 4600 int i;
4601
4602 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48 4603 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4604
4605 rtnl_lock();
4606
176c39af
DL		 4607 /* clean dev list */
4608 for_each_netdev(&init_net, dev) {
4609 if (__in6_dev_get(dev) == NULL)
4610 continue;
4611 addrconf_ifdown(dev, 1);
4612 }
4613 addrconf_ifdown(init_net.loopback_dev, 2);
4614
1da177e4
LT		 4615 /*
4616 * Check hash table.
4617 */
5c578aed 4618 spin_lock_bh(&addrconf_hash_lock);
c2e21293 4619 for (i = 0; i < IN6_ADDR_HSIZE; i++)
4620 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
5c578aed 4621 spin_unlock_bh(&addrconf_hash_lock);
1da177e4
LT		 4622
4623 del_timer(&addr_chk_timer);
1da177e4 4624 rtnl_unlock();
1da177e4 4625}
Clone of davem's net-next-2.6 tree