projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
iwlwifi: don't include iwl-dev.h from iwl-devtrace.h
[GitHub/mt8127/android_kernel_alcatel_ttab.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 */
129static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130static DEFINE_RWLOCK(addrconf_hash_lock);
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
75c78500
MS		 140static void addrconf_bonding_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
b24b8a24 404 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 405 if ((dev->flags&IFF_LOOPBACK) ||
406 dev->type == ARPHRD_TUNNEL ||
9625ed72 407 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 408 dev->type == ARPHRD_SIT ||
0be669bb 409 dev->type == ARPHRD_NONE) {
322f74a4
IO		 410 printk(KERN_INFO
411 "%s: Disabled Privacy Extensions\n",
412 dev->name);
413 ndev->cnf.use_tempaddr = -1;
414 } else {
415 in6_dev_hold(ndev);
416 ipv6_regen_rndid((unsigned long) ndev);
417 }
1da177e4
LT		 418#endif
419
f24e3d65 420 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 421 ndev->if_flags |= IF_READY;
422
322f74a4
IO		 423 ipv6_mc_init_dev(ndev);
424 ndev->tstamp = jiffies;
f52295a9 425 addrconf_sysctl_register(ndev);
30c4cf57
DS		 426 /* protected by rtnl_lock */
427 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 428
429 /* Join all-node multicast group */
f3ee4010 430 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 431
1da177e4
LT		 432 return ndev;
433}
434
cee89473 435static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 436{
437 struct inet6_dev *idev;
438
439 ASSERT_RTNL();
440
441 if ((idev = __in6_dev_get(dev)) == NULL) {
442 if ((idev = ipv6_add_dev(dev)) == NULL)
443 return NULL;
444 }
c5e33bdd 445
1da177e4
LT		 446 if (dev->flags&IFF_UP)
447 ipv6_mc_up(idev);
448 return idev;
449}
450
451#ifdef CONFIG_SYSCTL
452static void dev_forward_change(struct inet6_dev *idev)
453{
454 struct net_device *dev;
455 struct inet6_ifaddr *ifa;
1da177e4
LT		 456
457 if (!idev)
458 return;
459 dev = idev->dev;
0187bdfb
BH		 460 if (idev->cnf.forwarding)
461 dev_disable_lro(dev);
1da177e4 462 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 463 if (idev->cnf.forwarding)
f3ee4010 464 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 465 else
f3ee4010 466 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4
LT		 467 }
468 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 469 if (ifa->flags&IFA_F_TENTATIVE)
470 continue;
1da177e4
LT		 471 if (idev->cnf.forwarding)
472 addrconf_join_anycast(ifa);
473 else
474 addrconf_leave_anycast(ifa);
475 }
476}
477
478
e186932b 479static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 480{
481 struct net_device *dev;
482 struct inet6_dev *idev;
483
c6d14c84
ED		 484 rcu_read_lock();
485 for_each_netdev_rcu(net, dev) {
1da177e4
LT		 486 idev = __in6_dev_get(dev);
487 if (idev) {
e186932b
PE		 488 int changed = (!idev->cnf.forwarding) ^ (!newf);
489 idev->cnf.forwarding = newf;
1da177e4
LT		 490 if (changed)
491 dev_forward_change(idev);
492 }
1da177e4 493 }
c6d14c84 494 rcu_read_unlock();
1da177e4 495}
c8fecf22 496
b325fddb 497static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
c8fecf22 498{
bff16c2f
PE		 499 struct net *net;
500
501 net = (struct net *)table->extra2;
441fc2a2 502 if (p == &net->ipv6.devconf_dflt->forwarding)
b325fddb
SH		 503 return 0;
504
88af182e
EB		 505 if (!rtnl_trylock()) {
506 /* Restore the original values before restarting */
507 *p = old;
5007392d 508 return restart_syscall();
88af182e 509 }
c8fecf22 510
e186932b
PE		 511 if (p == &net->ipv6.devconf_all->forwarding) {
512 __s32 newf = net->ipv6.devconf_all->forwarding;
513 net->ipv6.devconf_dflt->forwarding = newf;
514 addrconf_forward_change(net, newf);
c8fecf22
PE		 515 } else if ((!*p) ^ (!old))
516 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 517 rtnl_unlock();
c8fecf22
PE		 518
519 if (*p)
7b4da532 520 rt6_purge_dflt_routers(net);
b325fddb 521 return 1;
c8fecf22 522}
1da177e4
LT		 523#endif
524
525/* Nobody refers to this ifaddr, destroy it */
526
527void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
528{
547b792c
IJ		 529 WARN_ON(ifp->if_next != NULL);
530 WARN_ON(ifp->lst_next != NULL);
531
1da177e4
LT		 532#ifdef NET_REFCNT_DEBUG
533 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
534#endif
535
536 in6_dev_put(ifp->idev);
537
538 if (del_timer(&ifp->timer))
539 printk("Timer is still running, when freeing ifa=%p\n", ifp);
540
541 if (!ifp->dead) {
542 printk("Freeing alive inet6 address %p\n", ifp);
543 return;
544 }
545 dst_release(&ifp->rt->u.dst);
546
547 kfree(ifp);
548}
549
e55ffac6
BH		 550static void
551ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
552{
553 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 554 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 555
556 /*
557 * Each device address list is sorted in order of scope -
558 * global before linklocal.
559 */
560 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
561 ifap = &ifa->if_next) {
8a6ce0c0 562 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 563 break;
564 }
565
566 ifp->if_next = *ifap;
567 *ifap = ifp;
568}
569
3eb84f49
YH		 570/*
571 * Hash function taken from net_alias.c
572 */
573static u8 ipv6_addr_hash(const struct in6_addr *addr)
574{
575 __u32 word;
576
577 /*
578 * We perform the hash function over the last 64 bits of the address
579 * This will include the IEEE address token on links that support it.
580 */
581
582 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
583 word ^= (word >> 16);
584 word ^= (word >> 8);
585
586 return ((word ^ (word >> 4)) & 0x0f);
587}
588
1da177e4
LT		 589/* On success it returns ifp with increased reference count */
590
591static struct inet6_ifaddr *
592ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 593 int scope, u32 flags)
1da177e4
LT		 594{
595 struct inet6_ifaddr *ifa = NULL;
596 struct rt6_info *rt;
597 int hash;
598 int err = 0;
d68b8270
YH		 599 int addr_type = ipv6_addr_type(addr);
600
601 if (addr_type == IPV6_ADDR_ANY ||
602 addr_type & IPV6_ADDR_MULTICAST ||
603 (!(idev->dev->flags & IFF_LOOPBACK) &&
604 addr_type & IPV6_ADDR_LOOPBACK))
605 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 606
8814c4b5 607 rcu_read_lock_bh();
1da177e4
LT		 608 if (idev->dead) {
609 err = -ENODEV; /*XXX*/
610 goto out2;
611 }
612
56d417b1 613 if (idev->cnf.disable_ipv6) {
9bdd8d40
BH		 614 err = -EACCES;
615 goto out2;
616 }
617
1da177e4
LT		 618 write_lock(&addrconf_hash_lock);
619
620 /* Ignore adding duplicate addresses on an interface */
c346dca1 621 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 622 ADBG(("ipv6_add_addr: already assigned\n"));
623 err = -EEXIST;
624 goto out;
625 }
626
322f74a4 627 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 628
629 if (ifa == NULL) {
630 ADBG(("ipv6_add_addr: malloc failed\n"));
631 err = -ENOBUFS;
632 goto out;
633 }
634
635 rt = addrconf_dst_alloc(idev, addr, 0);
636 if (IS_ERR(rt)) {
637 err = PTR_ERR(rt);
638 goto out;
639 }
640
1da177e4
LT		 641 ipv6_addr_copy(&ifa->addr, addr);
642
643 spin_lock_init(&ifa->lock);
644 init_timer(&ifa->timer);
645 ifa->timer.data = (unsigned long) ifa;
646 ifa->scope = scope;
647 ifa->prefix_len = pfxlen;
648 ifa->flags = flags | IFA_F_TENTATIVE;
649 ifa->cstamp = ifa->tstamp = jiffies;
650
57f5f544
KF		 651 ifa->rt = rt;
652
95c385b4
NH		 653 /*
654 * part one of RFC 4429, section 3.3
655 * We should not configure an address as
656 * optimistic if we do not yet know the link
657 * layer address of our nexhop router
658 */
659
660 if (rt->rt6i_nexthop == NULL)
661 ifa->flags &= ~IFA_F_OPTIMISTIC;
662
1da177e4
LT		 663 ifa->idev = idev;
664 in6_dev_hold(idev);
665 /* For caller */
666 in6_ifa_hold(ifa);
667
668 /* Add to big hash table */
669 hash = ipv6_addr_hash(addr);
670
671 ifa->lst_next = inet6_addr_lst[hash];
672 inet6_addr_lst[hash] = ifa;
673 in6_ifa_hold(ifa);
674 write_unlock(&addrconf_hash_lock);
675
676 write_lock(&idev->lock);
677 /* Add to inet6_dev unicast addr list. */
e55ffac6 678 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 679
680#ifdef CONFIG_IPV6_PRIVACY
681 if (ifa->flags&IFA_F_TEMPORARY) {
682 ifa->tmp_next = idev->tempaddr_list;
683 idev->tempaddr_list = ifa;
684 in6_ifa_hold(ifa);
685 }
686#endif
687
1da177e4
LT		 688 in6_ifa_hold(ifa);
689 write_unlock(&idev->lock);
690out2:
8814c4b5 691 rcu_read_unlock_bh();
1da177e4 692
fd92833a 693 if (likely(err == 0))
e041c683 694 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 695 else {
696 kfree(ifa);
697 ifa = ERR_PTR(err);
698 }
699
700 return ifa;
701out:
702 write_unlock(&addrconf_hash_lock);
703 goto out2;
704}
705
706/* This function wants to get referenced ifp and releases it before return */
707
708static void ipv6_del_addr(struct inet6_ifaddr *ifp)
709{
710 struct inet6_ifaddr *ifa, **ifap;
711 struct inet6_dev *idev = ifp->idev;
712 int hash;
713 int deleted = 0, onlink = 0;
714 unsigned long expires = jiffies;
715
716 hash = ipv6_addr_hash(&ifp->addr);
717
718 ifp->dead = 1;
719
720 write_lock_bh(&addrconf_hash_lock);
721 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
722 ifap = &ifa->lst_next) {
723 if (ifa == ifp) {
724 *ifap = ifa->lst_next;
725 __in6_ifa_put(ifp);
726 ifa->lst_next = NULL;
727 break;
728 }
729 }
730 write_unlock_bh(&addrconf_hash_lock);
731
732 write_lock_bh(&idev->lock);
733#ifdef CONFIG_IPV6_PRIVACY
734 if (ifp->flags&IFA_F_TEMPORARY) {
735 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
736 ifap = &ifa->tmp_next) {
737 if (ifa == ifp) {
738 *ifap = ifa->tmp_next;
739 if (ifp->ifpub) {
740 in6_ifa_put(ifp->ifpub);
741 ifp->ifpub = NULL;
742 }
743 __in6_ifa_put(ifp);
744 ifa->tmp_next = NULL;
745 break;
746 }
747 }
748 }
749#endif
750
1d142804 751 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 752 if (ifa == ifp) {
753 *ifap = ifa->if_next;
754 __in6_ifa_put(ifp);
755 ifa->if_next = NULL;
756 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
757 break;
758 deleted = 1;
1d142804 759 continue;
1da177e4
LT		 760 } else if (ifp->flags & IFA_F_PERMANENT) {
761 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
762 ifp->prefix_len)) {
763 if (ifa->flags & IFA_F_PERMANENT) {
764 onlink = 1;
765 if (deleted)
766 break;
767 } else {
768 unsigned long lifetime;
769
770 if (!onlink)
771 onlink = -1;
772
773 spin_lock(&ifa->lock);
4bed72e4
YH		 774
775 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
776 /*
777 * Note: Because this address is
778 * not permanent, lifetime <
779 * LONG_MAX / HZ here.
780 */
1da177e4
LT		 781 if (time_before(expires,
782 ifa->tstamp + lifetime * HZ))
783 expires = ifa->tstamp + lifetime * HZ;
784 spin_unlock(&ifa->lock);
785 }
786 }
787 }
1d142804 788 ifap = &ifa->if_next;
1da177e4
LT		 789 }
790 write_unlock_bh(&idev->lock);
791
b2238566
AV		 792 addrconf_del_timer(ifp);
793
1da177e4
LT		 794 ipv6_ifa_notify(RTM_DELADDR, ifp);
795
e041c683 796 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 797
1da177e4
LT		 798 /*
799 * Purge or update corresponding prefix
800 *
801 * 1) we don't purge prefix here if address was not permanent.
802 * prefix is managed by its own lifetime.
803 * 2) if there're no addresses, delete prefix.
804 * 3) if there're still other permanent address(es),
805 * corresponding prefix is still permanent.
806 * 4) otherwise, update prefix lifetime to the
807 * longest valid lifetime among the corresponding
808 * addresses on the device.
809 * Note: subsequent RA will update lifetime.
810 *
811 * --yoshfuji
812 */
813 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
814 struct in6_addr prefix;
815 struct rt6_info *rt;
c346dca1 816 struct net *net = dev_net(ifp->idev->dev);
1da177e4 817 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 818 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 819
2b5ead46 820 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 821 if (onlink == 0) {
e0a1ad73 822 ip6_del_rt(rt);
1da177e4
LT		 823 rt = NULL;
824 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
825 rt->rt6i_expires = expires;
826 rt->rt6i_flags |= RTF_EXPIRES;
827 }
828 }
829 dst_release(&rt->u.dst);
830 }
831
832 in6_ifa_put(ifp);
833}
834
835#ifdef CONFIG_IPV6_PRIVACY
836static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
837{
838 struct inet6_dev *idev = ifp->idev;
839 struct in6_addr addr, *tmpaddr;
840 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 841 unsigned long regen_advance;
1da177e4
LT		 842 int tmp_plen;
843 int ret = 0;
844 int max_addresses;
95c385b4 845 u32 addr_flags;
1da177e4
LT		 846
847 write_lock(&idev->lock);
848 if (ift) {
849 spin_lock_bh(&ift->lock);
850 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
851 spin_unlock_bh(&ift->lock);
852 tmpaddr = &addr;
853 } else {
854 tmpaddr = NULL;
855 }
856retry:
857 in6_dev_hold(idev);
858 if (idev->cnf.use_tempaddr <= 0) {
859 write_unlock(&idev->lock);
860 printk(KERN_INFO
861 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
862 in6_dev_put(idev);
863 ret = -1;
864 goto out;
865 }
866 spin_lock_bh(&ifp->lock);
867 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
868 idev->cnf.use_tempaddr = -1; /*XXX*/
869 spin_unlock_bh(&ifp->lock);
870 write_unlock(&idev->lock);
871 printk(KERN_WARNING
872 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
873 in6_dev_put(idev);
874 ret = -1;
875 goto out;
876 }
877 in6_ifa_hold(ifp);
878 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
879 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
880 spin_unlock_bh(&ifp->lock);
881 write_unlock(&idev->lock);
882 printk(KERN_WARNING
883 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
884 in6_ifa_put(ifp);
885 in6_dev_put(idev);
886 ret = -1;
887 goto out;
888 }
889 memcpy(&addr.s6_addr[8], idev->rndid, 8);
890 tmp_valid_lft = min_t(__u32,
891 ifp->valid_lft,
892 idev->cnf.temp_valid_lft);
1ab1457c
YH		 893 tmp_prefered_lft = min_t(__u32,
894 ifp->prefered_lft,
1da177e4
LT		 895 idev->cnf.temp_prefered_lft - desync_factor / HZ);
896 tmp_plen = ifp->prefix_len;
897 max_addresses = idev->cnf.max_addresses;
898 tmp_cstamp = ifp->cstamp;
899 tmp_tstamp = ifp->tstamp;
900 spin_unlock_bh(&ifp->lock);
901
eac55bf9
BB		 902 regen_advance = idev->cnf.regen_max_retry *
903 idev->cnf.dad_transmits *
904 idev->nd_parms->retrans_time / HZ;
1da177e4 905 write_unlock(&idev->lock);
95c385b4 906
eac55bf9
BB		 907 /* A temporary address is created only if this calculated Preferred
908 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
909 * an implementation must not create a temporary address with a zero
910 * Preferred Lifetime.
911 */
912 if (tmp_prefered_lft <= regen_advance) {
913 in6_ifa_put(ifp);
914 in6_dev_put(idev);
915 ret = -1;
916 goto out;
917 }
918
95c385b4
NH		 919 addr_flags = IFA_F_TEMPORARY;
920 /* set in addrconf_prefix_rcv() */
921 if (ifp->flags & IFA_F_OPTIMISTIC)
922 addr_flags |= IFA_F_OPTIMISTIC;
923
1da177e4 924 ift = !max_addresses ||
1ab1457c 925 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 926 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 927 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
928 addr_flags) : NULL;
1da177e4
LT		 929 if (!ift || IS_ERR(ift)) {
930 in6_ifa_put(ifp);
931 in6_dev_put(idev);
932 printk(KERN_INFO
933 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
934 tmpaddr = &addr;
935 write_lock(&idev->lock);
936 goto retry;
937 }
938
939 spin_lock_bh(&ift->lock);
940 ift->ifpub = ifp;
941 ift->valid_lft = tmp_valid_lft;
942 ift->prefered_lft = tmp_prefered_lft;
943 ift->cstamp = tmp_cstamp;
944 ift->tstamp = tmp_tstamp;
945 spin_unlock_bh(&ift->lock);
946
947 addrconf_dad_start(ift, 0);
948 in6_ifa_put(ift);
949 in6_dev_put(idev);
950out:
951 return ret;
952}
953#endif
954
955/*
072047e4 956 * Choose an appropriate source address (RFC3484)
1da177e4 957 */
a9b05723
YH		 958enum {
959 IPV6_SADDR_RULE_INIT = 0,
960 IPV6_SADDR_RULE_LOCAL,
961 IPV6_SADDR_RULE_SCOPE,
962 IPV6_SADDR_RULE_PREFERRED,
963#ifdef CONFIG_IPV6_MIP6
964 IPV6_SADDR_RULE_HOA,
965#endif
966 IPV6_SADDR_RULE_OIF,
967 IPV6_SADDR_RULE_LABEL,
968#ifdef CONFIG_IPV6_PRIVACY
969 IPV6_SADDR_RULE_PRIVACY,
970#endif
971 IPV6_SADDR_RULE_ORCHID,
972 IPV6_SADDR_RULE_PREFIX,
973 IPV6_SADDR_RULE_MAX
974};
975
072047e4 976struct ipv6_saddr_score {
a9b05723
YH		 977 int rule;
978 int addr_type;
979 struct inet6_ifaddr *ifa;
980 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
981 int scopedist;
982 int matchlen;
072047e4
YH		 983};
984
a9b05723 985struct ipv6_saddr_dst {
9acd9f3a 986 const struct in6_addr *addr;
a9b05723
YH		 987 int ifindex;
988 int scope;
989 int label;
7cbca67c 990 unsigned int prefs;
a9b05723 991};
072047e4 992
b6f99a21 993static inline int ipv6_saddr_preferred(int type)
1da177e4 994{
45bb0060 995 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
072047e4
YH		 996 return 1;
997 return 0;
1da177e4
LT		 998}
999
3de23255
BT		 1000static int ipv6_get_saddr_eval(struct net *net,
1001 struct ipv6_saddr_score *score,
a9b05723
YH		 1002 struct ipv6_saddr_dst *dst,
1003 int i)
1004{
1005 int ret;
1006
1007 if (i <= score->rule) {
1008 switch (i) {
1009 case IPV6_SADDR_RULE_SCOPE:
1010 ret = score->scopedist;
1011 break;
1012 case IPV6_SADDR_RULE_PREFIX:
1013 ret = score->matchlen;
1014 break;
1015 default:
1016 ret = !!test_bit(i, score->scorebits);
1017 }
1018 goto out;
1019 }
1020
1021 switch (i) {
1022 case IPV6_SADDR_RULE_INIT:
1023 /* Rule 0: remember if hiscore is not ready yet */
1024 ret = !!score->ifa;
1025 break;
1026 case IPV6_SADDR_RULE_LOCAL:
1027 /* Rule 1: Prefer same address */
1028 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1029 break;
1030 case IPV6_SADDR_RULE_SCOPE:
1031 /* Rule 2: Prefer appropriate scope
1032 *
1033 * ret
1034 * ^
1035 * -1 | d 15
1036 * ---+--+-+---> scope
1037 * |
1038 * | d is scope of the destination.
1039 * B-d | \
1040 * | \ <- smaller scope is better if
1041 * B-15 | \ if scope is enough for destinaion.
1042 * | ret = B - scope (-1 <= scope >= d <= 15).
1043 * d-C-1 | /
1044 * |/ <- greater is better
1045 * -C / if scope is not enough for destination.
1046 * /| ret = scope - C (-1 <= d < scope <= 15).
1047 *
1048 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1049 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1050 * Assume B = 0 and we get C > 29.
1051 */
1052 ret = __ipv6_addr_src_scope(score->addr_type);
1053 if (ret >= dst->scope)
1054 ret = -ret;
1055 else
1056 ret -= 128; /* 30 is enough */
1057 score->scopedist = ret;
1058 break;
1059 case IPV6_SADDR_RULE_PREFERRED:
1060 /* Rule 3: Avoid deprecated and optimistic addresses */
1061 ret = ipv6_saddr_preferred(score->addr_type) ||
1062 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1063 break;
1064#ifdef CONFIG_IPV6_MIP6
1065 case IPV6_SADDR_RULE_HOA:
7cbca67c 1066 {
a9b05723 1067 /* Rule 4: Prefer home address */
7cbca67c
YH		 1068 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1069 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1070 break;
7cbca67c 1071 }
a9b05723
YH		 1072#endif
1073 case IPV6_SADDR_RULE_OIF:
1074 /* Rule 5: Prefer outgoing interface */
1075 ret = (!dst->ifindex ||
1076 dst->ifindex == score->ifa->idev->dev->ifindex);
1077 break;
1078 case IPV6_SADDR_RULE_LABEL:
1079 /* Rule 6: Prefer matching label */
3de23255
BT		 1080 ret = ipv6_addr_label(net,
1081 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1082 score->ifa->idev->dev->ifindex) == dst->label;
1083 break;
1084#ifdef CONFIG_IPV6_PRIVACY
1085 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1086 {
a9b05723
YH		 1087 /* Rule 7: Prefer public address
1088 * Note: prefer temprary address if use_tempaddr >= 2
1089 */
7cbca67c
YH		 1090 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1091 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1092 score->ifa->idev->cnf.use_tempaddr >= 2;
1093 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1094 break;
7cbca67c 1095 }
a9b05723
YH		 1096#endif
1097 case IPV6_SADDR_RULE_ORCHID:
1098 /* Rule 8-: Prefer ORCHID vs ORCHID or
1099 * non-ORCHID vs non-ORCHID
1100 */
1101 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1102 ipv6_addr_orchid(dst->addr));
1103 break;
1104 case IPV6_SADDR_RULE_PREFIX:
1105 /* Rule 8: Use longest matching prefix */
1106 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1107 dst->addr);
1108 break;
1109 default:
1110 ret = 0;
1111 }
1112
1113 if (ret)
1114 __set_bit(i, score->scorebits);
1115 score->rule = i;
1116out:
1117 return ret;
1118}
1119
191cd582 1120int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
9acd9f3a 1121 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1122 struct in6_addr *saddr)
1da177e4 1123{
a9b05723
YH		 1124 struct ipv6_saddr_score scores[2],
1125 *score = &scores[0], *hiscore = &scores[1];
a9b05723 1126 struct ipv6_saddr_dst dst;
072047e4 1127 struct net_device *dev;
a9b05723 1128 int dst_type;
1da177e4 1129
a9b05723
YH		 1130 dst_type = __ipv6_addr_type(daddr);
1131 dst.addr = daddr;
1132 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1133 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1134 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1135 dst.prefs = prefs;
a9b05723
YH		 1136
1137 hiscore->rule = -1;
1138 hiscore->ifa = NULL;
1da177e4 1139
8814c4b5 1140 rcu_read_lock();
1da177e4 1141
c6d14c84 1142 for_each_netdev_rcu(net, dev) {
072047e4 1143 struct inet6_dev *idev;
072047e4 1144
a9b05723 1145 /* Candidate Source Address (section 4)
072047e4
YH		 1146 * - multicast and link-local destination address,
1147 * the set of candidate source address MUST only
1148 * include addresses assigned to interfaces
1149 * belonging to the same link as the outgoing
1150 * interface.
1151 * (- For site-local destination addresses, the
1152 * set of candidate source addresses MUST only
1153 * include addresses assigned to interfaces
1154 * belonging to the same site as the outgoing
1155 * interface.)
1156 */
a9b05723
YH		 1157 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1158 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1159 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1160 continue;
1da177e4 1161
1da177e4 1162 idev = __in6_dev_get(dev);
072047e4
YH		 1163 if (!idev)
1164 continue;
1165
1166 read_lock_bh(&idev->lock);
a9b05723
YH		 1167 for (score->ifa = idev->addr_list; score->ifa; score->ifa = score->ifa->if_next) {
1168 int i;
072047e4 1169
a9b05723 1170 /*
6b3ae80a
YH		 1171 * - Tentative Address (RFC2462 section 5.4)
1172 * - A tentative address is not considered
1173 * "assigned to an interface" in the traditional
95c385b4 1174 * sense, unless it is also flagged as optimistic.
6b3ae80a 1175 * - Candidate Source Address (section 4)
072047e4
YH		 1176 * - In any case, anycast addresses, multicast
1177 * addresses, and the unspecified address MUST
1178 * NOT be included in a candidate set.
1179 */
a9b05723
YH		 1180 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1181 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1182 continue;
a9b05723
YH		 1183
1184 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1185
1186 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1187 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1188 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1189 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1190 "assigned as unicast address on %s",
1191 dev->name);
1192 continue;
1193 }
1194
a9b05723
YH		 1195 score->rule = -1;
1196 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1197
1198 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1199 int minihiscore, miniscore;
1200
3de23255
BT		 1201 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1202 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1203
1204 if (minihiscore > miniscore) {
1205 if (i == IPV6_SADDR_RULE_SCOPE &&
1206 score->scopedist > 0) {
1207 /*
1208 * special case:
1209 * each remaining entry
1210 * has too small (not enough)
1211 * scope, because ifa entries
1212 * are sorted by their scope
1213 * values.
1214 */
1215 goto try_nextdev;
1216 }
1217 break;
1218 } else if (minihiscore < miniscore) {
a9b05723
YH		 1219 if (hiscore->ifa)
1220 in6_ifa_put(hiscore->ifa);
1221
1222 in6_ifa_hold(score->ifa);
1223
a0bffffc 1224 swap(hiscore, score);
a9b05723
YH		 1225
1226 /* restore our iterator */
1227 score->ifa = hiscore->ifa;
1228
1229 break;
1da177e4 1230 }
072047e4 1231 }
1da177e4 1232 }
a9b05723 1233try_nextdev:
072047e4 1234 read_unlock_bh(&idev->lock);
1da177e4 1235 }
8814c4b5 1236 rcu_read_unlock();
1da177e4 1237
a9b05723 1238 if (!hiscore->ifa)
072047e4 1239 return -EADDRNOTAVAIL;
1ab1457c 1240
a9b05723
YH		 1241 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1242 in6_ifa_put(hiscore->ifa);
072047e4 1243 return 0;
1da177e4
LT		 1244}
1245
5e5f3f0f 1246EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1247
95c385b4
NH		 1248int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1249 unsigned char banned_flags)
1da177e4
LT		 1250{
1251 struct inet6_dev *idev;
1252 int err = -EADDRNOTAVAIL;
1253
8814c4b5 1254 rcu_read_lock();
1da177e4
LT		 1255 if ((idev = __in6_dev_get(dev)) != NULL) {
1256 struct inet6_ifaddr *ifp;
1257
1258 read_lock_bh(&idev->lock);
1259 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1260 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1261 ipv6_addr_copy(addr, &ifp->addr);
1262 err = 0;
1263 break;
1264 }
1265 }
1266 read_unlock_bh(&idev->lock);
1267 }
8814c4b5 1268 rcu_read_unlock();
1da177e4
LT		 1269 return err;
1270}
1271
1272static int ipv6_count_addresses(struct inet6_dev *idev)
1273{
1274 int cnt = 0;
1275 struct inet6_ifaddr *ifp;
1276
1277 read_lock_bh(&idev->lock);
1278 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1279 cnt++;
1280 read_unlock_bh(&idev->lock);
1281 return cnt;
1282}
1283
bfeade08
DL		 1284int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1285 struct net_device *dev, int strict)
1da177e4
LT		 1286{
1287 struct inet6_ifaddr * ifp;
1288 u8 hash = ipv6_addr_hash(addr);
1289
1290 read_lock_bh(&addrconf_hash_lock);
1291 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1292 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1293 continue;
1da177e4
LT		 1294 if (ipv6_addr_equal(&ifp->addr, addr) &&
1295 !(ifp->flags&IFA_F_TENTATIVE)) {
1296 if (dev == NULL || ifp->idev->dev == dev ||
1297 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1298 break;
1299 }
1300 }
1301 read_unlock_bh(&addrconf_hash_lock);
1302 return ifp != NULL;
1303}
7159039a
YH		 1304EXPORT_SYMBOL(ipv6_chk_addr);
1305
1da177e4 1306static
06bfe655
DL		 1307int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1308 struct net_device *dev)
1da177e4
LT		 1309{
1310 struct inet6_ifaddr * ifp;
1311 u8 hash = ipv6_addr_hash(addr);
1312
1313 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1314 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1315 continue;
1da177e4
LT		 1316 if (ipv6_addr_equal(&ifp->addr, addr)) {
1317 if (dev == NULL || ifp->idev->dev == dev)
1318 break;
1319 }
1320 }
1321 return ifp != NULL;
1322}
1323
52eeeb84
YH		 1324int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1325{
1326 struct inet6_dev *idev;
1327 struct inet6_ifaddr *ifa;
1328 int onlink;
1329
1330 onlink = 0;
1331 rcu_read_lock();
1332 idev = __in6_dev_get(dev);
1333 if (idev) {
1334 read_lock_bh(&idev->lock);
1335 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
1336 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1337 ifa->prefix_len);
1338 if (onlink)
1339 break;
1340 }
1341 read_unlock_bh(&idev->lock);
1342 }
1343 rcu_read_unlock();
1344 return onlink;
1345}
1346
1347EXPORT_SYMBOL(ipv6_chk_prefix);
1348
9acd9f3a 1349struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1350 struct net_device *dev, int strict)
1da177e4
LT		 1351{
1352 struct inet6_ifaddr * ifp;
1353 u8 hash = ipv6_addr_hash(addr);
1354
1355 read_lock_bh(&addrconf_hash_lock);
1356 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
878628fb 1357 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1358 continue;
1da177e4
LT		 1359 if (ipv6_addr_equal(&ifp->addr, addr)) {
1360 if (dev == NULL || ifp->idev->dev == dev ||
1361 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1362 in6_ifa_hold(ifp);
1363 break;
1364 }
1365 }
1366 }
1367 read_unlock_bh(&addrconf_hash_lock);
1368
1369 return ifp;
1370}
1371
1da177e4
LT		 1372/* Gets referenced address, destroys ifaddr */
1373
cc411d0b 1374static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
1da177e4 1375{
1da177e4
LT		 1376 if (ifp->flags&IFA_F_PERMANENT) {
1377 spin_lock_bh(&ifp->lock);
1378 addrconf_del_timer(ifp);
1379 ifp->flags |= IFA_F_TENTATIVE;
cc411d0b
BH		 1380 if (dad_failed)
1381 ifp->flags |= IFA_F_DADFAILED;
1da177e4 1382 spin_unlock_bh(&ifp->lock);
e2577a06
HX		 1383 if (dad_failed)
1384 ipv6_ifa_notify(0, ifp);
1da177e4
LT		 1385 in6_ifa_put(ifp);
1386#ifdef CONFIG_IPV6_PRIVACY
1387 } else if (ifp->flags&IFA_F_TEMPORARY) {
1388 struct inet6_ifaddr *ifpub;
1389 spin_lock_bh(&ifp->lock);
1390 ifpub = ifp->ifpub;
1391 if (ifpub) {
1392 in6_ifa_hold(ifpub);
1393 spin_unlock_bh(&ifp->lock);
1394 ipv6_create_tempaddr(ifpub, ifp);
1395 in6_ifa_put(ifpub);
1396 } else {
1397 spin_unlock_bh(&ifp->lock);
1398 }
1399 ipv6_del_addr(ifp);
1400#endif
1401 } else
1402 ipv6_del_addr(ifp);
1403}
1404
3c21edbd
YH		 1405void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1406{
1b34be74 1407 struct inet6_dev *idev = ifp->idev;
9bdd8d40
BH		 1408
1409 if (net_ratelimit())
0522fea6
JR		 1410 printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n",
1411 ifp->idev->dev->name, &ifp->addr);
9bdd8d40 1412
1b34be74
YH		 1413 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1414 struct in6_addr addr;
1415
1416 addr.s6_addr32[0] = htonl(0xfe800000);
1417 addr.s6_addr32[1] = 0;
1418
1419 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1420 ipv6_addr_equal(&ifp->addr, &addr)) {
1421 /* DAD failed for link-local based on MAC address */
1422 idev->cnf.disable_ipv6 = 1;
9bdd8d40
BH		 1423
1424 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1425 ifp->idev->dev->name);
1b34be74
YH		 1426 }
1427 }
1428
cc411d0b 1429 addrconf_dad_stop(ifp, 1);
3c21edbd 1430}
1da177e4
LT		 1431
1432/* Join to solicited addr multicast group. */
1433
1434void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1435{
1436 struct in6_addr maddr;
1437
1438 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1439 return;
1440
1441 addrconf_addr_solict_mult(addr, &maddr);
1442 ipv6_dev_mc_inc(dev, &maddr);
1443}
1444
1445void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1446{
1447 struct in6_addr maddr;
1448
1449 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1450 return;
1451
1452 addrconf_addr_solict_mult(addr, &maddr);
1453 __ipv6_dev_mc_dec(idev, &maddr);
1454}
1455
20380731 1456static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1457{
1458 struct in6_addr addr;
1459 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1460 if (ipv6_addr_any(&addr))
1461 return;
1462 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1463}
1464
20380731 1465static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1466{
1467 struct in6_addr addr;
1468 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1469 if (ipv6_addr_any(&addr))
1470 return;
1471 __ipv6_dev_ac_dec(ifp->idev, &addr);
1472}
1473
073a8e0e
YH		 1474static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1475{
1476 if (dev->addr_len != ETH_ALEN)
1477 return -1;
1478 memcpy(eui, dev->dev_addr, 3);
1479 memcpy(eui + 5, dev->dev_addr + 3, 3);
1480
1481 /*
1482 * The zSeries OSA network cards can be shared among various
1483 * OS instances, but the OSA cards have only one MAC address.
1484 * This leads to duplicate address conflicts in conjunction
1485 * with IPv6 if more than one instance uses the same card.
1486 *
1487 * The driver for these cards can deliver a unique 16-bit
1488 * identifier for each instance sharing the same card. It is
1489 * placed instead of 0xFFFE in the interface identifier. The
1490 * "u" bit of the interface identifier is not inverted in this
1491 * case. Hence the resulting interface identifier has local
1492 * scope according to RFC2373.
1493 */
1494 if (dev->dev_id) {
1495 eui[3] = (dev->dev_id >> 8) & 0xFF;
1496 eui[4] = dev->dev_id & 0xFF;
1497 } else {
1498 eui[3] = 0xFF;
1499 eui[4] = 0xFE;
1500 eui[0] ^= 2;
1501 }
1502 return 0;
1503}
1504
1505static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1506{
1507 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1508 if (dev->addr_len != ARCNET_ALEN)
1509 return -1;
1510 memset(eui, 0, 7);
1511 eui[7] = *(u8*)dev->dev_addr;
1512 return 0;
1513}
1514
1515static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1516{
1517 if (dev->addr_len != INFINIBAND_ALEN)
1518 return -1;
1519 memcpy(eui, dev->dev_addr + 12, 8);
1520 eui[0] |= 2;
1521 return 0;
1522}
1523
dfd982ba
YH		 1524int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1525{
9af28511
SH		 1526 if (addr == 0)
1527 return -1;
dfd982ba
YH		 1528 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1529 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1530 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1531 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1532 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1533 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1534 eui[1] = 0;
1535 eui[2] = 0x5E;
1536 eui[3] = 0xFE;
1537 memcpy(eui + 4, &addr, 4);
1538 return 0;
1539}
1540EXPORT_SYMBOL(__ipv6_isatap_ifid);
1541
1542static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1543{
1544 if (dev->priv_flags & IFF_ISATAP)
1545 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1546 return -1;
1547}
1548
1da177e4
LT		 1549static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1550{
1551 switch (dev->type) {
1552 case ARPHRD_ETHER:
1553 case ARPHRD_FDDI:
1554 case ARPHRD_IEEE802_TR:
073a8e0e 1555 return addrconf_ifid_eui48(eui, dev);
1da177e4 1556 case ARPHRD_ARCNET:
073a8e0e 1557 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1558 case ARPHRD_INFINIBAND:
073a8e0e 1559 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1560 case ARPHRD_SIT:
dfd982ba 1561 return addrconf_ifid_sit(eui, dev);
1da177e4
LT		 1562 }
1563 return -1;
1564}
1565
1566static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1567{
1568 int err = -1;
1569 struct inet6_ifaddr *ifp;
1570
1571 read_lock_bh(&idev->lock);
1572 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1573 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1574 memcpy(eui, ifp->addr.s6_addr+8, 8);
1575 err = 0;
1576 break;
1577 }
1578 }
1579 read_unlock_bh(&idev->lock);
1580 return err;
1581}
1582
1583#ifdef CONFIG_IPV6_PRIVACY
1584/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1585static int __ipv6_regen_rndid(struct inet6_dev *idev)
1586{
1da177e4 1587regen:
955189ef 1588 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1589 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1590
1591 /*
1592 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1593 * check if generated address is not inappropriate
1594 *
1595 * - Reserved subnet anycast (RFC 2526)
1596 * 11111101 11....11 1xxxxxxx
c7dc89c0 1597 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1598 * 00-00-5E-FE-xx-xx-xx-xx
1599 * - value 0
1600 * - XXX: already assigned to an address on the device
1601 */
1ab1457c 1602 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1603 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1604 (idev->rndid[7]&0x80))
1605 goto regen;
1606 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1607 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1608 goto regen;
1609 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1610 goto regen;
1611 }
1612
1613 return 0;
1614}
1615
1616static void ipv6_regen_rndid(unsigned long data)
1617{
1618 struct inet6_dev *idev = (struct inet6_dev *) data;
1619 unsigned long expires;
1620
8814c4b5 1621 rcu_read_lock_bh();
1da177e4
LT		 1622 write_lock_bh(&idev->lock);
1623
1624 if (idev->dead)
1625 goto out;
1626
1627 if (__ipv6_regen_rndid(idev) < 0)
1628 goto out;
1ab1457c 1629
1da177e4 1630 expires = jiffies +
1ab1457c 1631 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1632 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1633 if (time_before(expires, jiffies)) {
1634 printk(KERN_WARNING
1635 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1636 idev->dev->name);
1637 goto out;
1638 }
1639
1640 if (!mod_timer(&idev->regen_timer, expires))
1641 in6_dev_hold(idev);
1642
1643out:
1644 write_unlock_bh(&idev->lock);
8814c4b5 1645 rcu_read_unlock_bh();
1da177e4
LT		 1646 in6_dev_put(idev);
1647}
1648
1649static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1650 int ret = 0;
1651
1652 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1653 ret = __ipv6_regen_rndid(idev);
1654 return ret;
1655}
1656#endif
1657
1658/*
1659 * Add prefix route.
1660 */
1661
1662static void
1663addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1664 unsigned long expires, u32 flags)
1da177e4 1665{
86872cb5
TG		 1666 struct fib6_config cfg = {
1667 .fc_table = RT6_TABLE_PREFIX,
1668 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1669 .fc_ifindex = dev->ifindex,
1670 .fc_expires = expires,
1671 .fc_dst_len = plen,
1672 .fc_flags = RTF_UP | flags,
c346dca1 1673 .fc_nlinfo.nl_net = dev_net(dev),
f410a1fb 1674 .fc_protocol = RTPROT_KERNEL,
86872cb5 1675 };
1da177e4 1676
86872cb5 1677 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1678
1679 /* Prevent useless cloning on PtP SIT.
1680 This thing is done here expecting that the whole
1681 class of non-broadcast devices need not cloning.
1682 */
0be669bb 1683#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1684 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1685 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1686#endif
1da177e4 1687
86872cb5 1688 ip6_route_add(&cfg);
1da177e4
LT		 1689}
1690
1691/* Create "default" multicast route to the interface */
1692
1693static void addrconf_add_mroute(struct net_device *dev)
1694{
86872cb5
TG		 1695 struct fib6_config cfg = {
1696 .fc_table = RT6_TABLE_LOCAL,
1697 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1698 .fc_ifindex = dev->ifindex,
1699 .fc_dst_len = 8,
1700 .fc_flags = RTF_UP,
c346dca1 1701 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1702 };
1703
1704 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1705
1706 ip6_route_add(&cfg);
1da177e4
LT		 1707}
1708
0be669bb 1709#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1710static void sit_route_add(struct net_device *dev)
1711{
86872cb5
TG		 1712 struct fib6_config cfg = {
1713 .fc_table = RT6_TABLE_MAIN,
1714 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1715 .fc_ifindex = dev->ifindex,
1716 .fc_dst_len = 96,
1717 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1718 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1719 };
1da177e4
LT		 1720
1721 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1722 ip6_route_add(&cfg);
1da177e4 1723}
0be669bb 1724#endif
1da177e4
LT		 1725
1726static void addrconf_add_lroute(struct net_device *dev)
1727{
1728 struct in6_addr addr;
1729
1730 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1731 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1732}
1733
1734static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1735{
1736 struct inet6_dev *idev;
1737
1738 ASSERT_RTNL();
1739
1740 if ((idev = ipv6_find_idev(dev)) == NULL)
1741 return NULL;
1742
1743 /* Add default multicast route */
1744 addrconf_add_mroute(dev);
1745
1746 /* Add link local route */
1747 addrconf_add_lroute(dev);
1748 return idev;
1749}
1750
1751void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1752{
1753 struct prefix_info *pinfo;
1754 __u32 valid_lft;
1755 __u32 prefered_lft;
1756 int addr_type;
1da177e4 1757 struct inet6_dev *in6_dev;
56d417b1 1758 struct net *net = dev_net(dev);
1da177e4
LT		 1759
1760 pinfo = (struct prefix_info *) opt;
1ab1457c 1761
1da177e4
LT		 1762 if (len < sizeof(struct prefix_info)) {
1763 ADBG(("addrconf: prefix option too short\n"));
1764 return;
1765 }
1ab1457c 1766
1da177e4
LT		 1767 /*
1768 * Validation checks ([ADDRCONF], page 19)
1769 */
1770
1771 addr_type = ipv6_addr_type(&pinfo->prefix);
1772
1773 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1774 return;
1775
1776 valid_lft = ntohl(pinfo->valid);
1777 prefered_lft = ntohl(pinfo->prefered);
1778
1779 if (prefered_lft > valid_lft) {
1780 if (net_ratelimit())
1781 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1782 return;
1783 }
1784
1785 in6_dev = in6_dev_get(dev);
1786
1787 if (in6_dev == NULL) {
1788 if (net_ratelimit())
1789 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1790 return;
1791 }
1792
1793 /*
1794 * Two things going on here:
1795 * 1) Add routes for on-link prefixes
1796 * 2) Configure prefixes with the auto flag set
1797 */
1798
4bed72e4
YH		 1799 if (pinfo->onlink) {
1800 struct rt6_info *rt;
1801 unsigned long rt_expires;
1802
6f704992
YH		 1803 /* Avoid arithmetic overflow. Really, we could
1804 * save rt_expires in seconds, likely valid_lft,
1805 * but it would require division in fib gc, that it
1806 * not good.
1807 */
4bed72e4
YH		 1808 if (HZ > USER_HZ)
1809 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1810 else
1811 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1812
4bed72e4
YH		 1813 if (addrconf_finite_timeout(rt_expires))
1814 rt_expires *= HZ;
1da177e4 1815
56d417b1 1816 rt = rt6_lookup(net, &pinfo->prefix, NULL,
6fda7350 1817 dev->ifindex, 1);
1da177e4 1818
2b5ead46 1819 if (rt && addrconf_is_prefix_route(rt)) {
6f704992
YH		 1820 /* Autoconf prefix route */
1821 if (valid_lft == 0) {
1822 ip6_del_rt(rt);
1823 rt = NULL;
4bed72e4 1824 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1825 /* not infinity */
1826 rt->rt6i_expires = jiffies + rt_expires;
1827 rt->rt6i_flags |= RTF_EXPIRES;
1828 } else {
1829 rt->rt6i_flags &= ~RTF_EXPIRES;
1830 rt->rt6i_expires = 0;
1da177e4
LT		 1831 }
1832 } else if (valid_lft) {
6f704992 1833 clock_t expires = 0;
4bed72e4
YH		 1834 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1835 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1836 /* not infinity */
1837 flags |= RTF_EXPIRES;
1838 expires = jiffies_to_clock_t(rt_expires);
1839 }
1da177e4 1840 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1841 dev, expires, flags);
1da177e4
LT		 1842 }
1843 if (rt)
1844 dst_release(&rt->u.dst);
1845 }
1846
1847 /* Try to figure out our local address for this prefix */
1848
1849 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1850 struct inet6_ifaddr * ifp;
1851 struct in6_addr addr;
1852 int create = 0, update_lft = 0;
1853
1854 if (pinfo->prefix_len == 64) {
1855 memcpy(&addr, &pinfo->prefix, 8);
1856 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1857 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1858 in6_dev_put(in6_dev);
1859 return;
1860 }
1861 goto ok;
1862 }
1863 if (net_ratelimit())
1864 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1865 pinfo->prefix_len);
1866 in6_dev_put(in6_dev);
1867 return;
1868
1869ok:
1870
53b7997f 1871 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1da177e4
LT		 1872
1873 if (ifp == NULL && valid_lft) {
1874 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1875 u32 addr_flags = 0;
1876
1877#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1878 if (in6_dev->cnf.optimistic_dad &&
53b7997f 1879 !net->ipv6.devconf_all->forwarding)
95c385b4
NH		 1880 addr_flags = IFA_F_OPTIMISTIC;
1881#endif
1da177e4
LT		 1882
1883 /* Do not allow to create too much of autoconfigured
1884 * addresses; this would be too easy way to crash kernel.
1885 */
1886 if (!max_addresses ||
1887 ipv6_count_addresses(in6_dev) < max_addresses)
1888 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1889 addr_type&IPV6_ADDR_SCOPE_MASK,
1890 addr_flags);
1da177e4
LT		 1891
1892 if (!ifp || IS_ERR(ifp)) {
1893 in6_dev_put(in6_dev);
1894 return;
1895 }
1896
1897 update_lft = create = 1;
1898 ifp->cstamp = jiffies;
1899 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1900 }
1901
1902 if (ifp) {
1903 int flags;
1904 unsigned long now;
1905#ifdef CONFIG_IPV6_PRIVACY
1906 struct inet6_ifaddr *ift;
1907#endif
1908 u32 stored_lft;
1909
1910 /* update lifetime (RFC2462 5.5.3 e) */
1911 spin_lock(&ifp->lock);
1912 now = jiffies;
1913 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1914 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1915 else
1916 stored_lft = 0;
1917 if (!update_lft && stored_lft) {
1918 if (valid_lft > MIN_VALID_LIFETIME ||
1919 valid_lft > stored_lft)
1920 update_lft = 1;
1921 else if (stored_lft <= MIN_VALID_LIFETIME) {
1922 /* valid_lft <= stored_lft is always true */
a1ed0526
BH		 1923 /*
1924 * RFC 4862 Section 5.5.3e:
1925 * "Note that the preferred lifetime of
1926 * the corresponding address is always
1927 * reset to the Preferred Lifetime in
1928 * the received Prefix Information
1929 * option, regardless of whether the
1930 * valid lifetime is also reset or
1931 * ignored."
1932 *
1933 * So if the preferred lifetime in
1934 * this advertisement is different
1935 * than what we have stored, but the
1936 * valid lifetime is invalid, just
1937 * reset prefered_lft.
1938 *
1939 * We must set the valid lifetime
1940 * to the stored lifetime since we'll
1941 * be updating the timestamp below,
1942 * else we'll set it back to the
1943 * minumum.
1944 */
1945 if (prefered_lft != ifp->prefered_lft) {
1946 valid_lft = stored_lft;
1947 update_lft = 1;
1948 }
1da177e4
LT		 1949 } else {
1950 valid_lft = MIN_VALID_LIFETIME;
1951 if (valid_lft < prefered_lft)
1952 prefered_lft = valid_lft;
1953 update_lft = 1;
1954 }
1955 }
1956
1957 if (update_lft) {
1958 ifp->valid_lft = valid_lft;
1959 ifp->prefered_lft = prefered_lft;
1960 ifp->tstamp = now;
1961 flags = ifp->flags;
1962 ifp->flags &= ~IFA_F_DEPRECATED;
1963 spin_unlock(&ifp->lock);
1964
1965 if (!(flags&IFA_F_TENTATIVE))
1966 ipv6_ifa_notify(0, ifp);
1967 } else
1968 spin_unlock(&ifp->lock);
1969
1970#ifdef CONFIG_IPV6_PRIVACY
1971 read_lock_bh(&in6_dev->lock);
1972 /* update all temporary addresses in the list */
1973 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1974 /*
1975 * When adjusting the lifetimes of an existing
1976 * temporary address, only lower the lifetimes.
1977 * Implementations must not increase the
1978 * lifetimes of an existing temporary address
1979 * when processing a Prefix Information Option.
1980 */
c6fbfac2
BB		 1981 if (ifp != ift->ifpub)
1982 continue;
1983
1da177e4
LT		 1984 spin_lock(&ift->lock);
1985 flags = ift->flags;
1986 if (ift->valid_lft > valid_lft &&
1987 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1988 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1989 if (ift->prefered_lft > prefered_lft &&
1990 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1991 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1992 spin_unlock(&ift->lock);
1993 if (!(flags&IFA_F_TENTATIVE))
1994 ipv6_ifa_notify(0, ift);
1995 }
1996
1997 if (create && in6_dev->cnf.use_tempaddr > 0) {
1998 /*
1999 * When a new public address is created as described in [ADDRCONF],
2000 * also create a new temporary address.
2001 */
1ab1457c 2002 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 2003 ipv6_create_tempaddr(ifp, NULL);
2004 } else {
2005 read_unlock_bh(&in6_dev->lock);
2006 }
2007#endif
2008 in6_ifa_put(ifp);
2009 addrconf_verify(0);
2010 }
2011 }
2012 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2013 in6_dev_put(in6_dev);
2014}
2015
2016/*
2017 * Set destination address.
2018 * Special case for SIT interfaces where we create a new "virtual"
2019 * device.
2020 */
af284937 2021int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 2022{
2023 struct in6_ifreq ireq;
2024 struct net_device *dev;
2025 int err = -EINVAL;
2026
2027 rtnl_lock();
2028
2029 err = -EFAULT;
2030 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2031 goto err_exit;
2032
af284937 2033 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2034
2035 err = -ENODEV;
2036 if (dev == NULL)
2037 goto err_exit;
2038
0be669bb 2039#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4 2040 if (dev->type == ARPHRD_SIT) {
5bc3eb7e 2041 const struct net_device_ops *ops = dev->netdev_ops;
1da177e4 2042 struct ifreq ifr;
1da177e4
LT		 2043 struct ip_tunnel_parm p;
2044
2045 err = -EADDRNOTAVAIL;
2046 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2047 goto err_exit;
2048
2049 memset(&p, 0, sizeof(p));
2050 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2051 p.iph.saddr = 0;
2052 p.iph.version = 4;
2053 p.iph.ihl = 5;
2054 p.iph.protocol = IPPROTO_IPV6;
2055 p.iph.ttl = 64;
d20b3109 2056 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4 2057
5bc3eb7e
SH		 2058 if (ops->ndo_do_ioctl) {
2059 mm_segment_t oldfs = get_fs();
2060
2061 set_fs(KERNEL_DS);
2062 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2063 set_fs(oldfs);
2064 } else
2065 err = -EOPNOTSUPP;
1da177e4
LT		 2066
2067 if (err == 0) {
2068 err = -ENOBUFS;
af284937
DL		 2069 dev = __dev_get_by_name(net, p.name);
2070 if (!dev)
1da177e4
LT		 2071 goto err_exit;
2072 err = dev_open(dev);
2073 }
2074 }
0be669bb 2075#endif
1da177e4
LT		 2076
2077err_exit:
2078 rtnl_unlock();
2079 return err;
2080}
2081
2082/*
2083 * Manual configuration of address on an interface
2084 */
af284937 2085static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2086 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2087 __u32 valid_lft)
1da177e4
LT		 2088{
2089 struct inet6_ifaddr *ifp;
2090 struct inet6_dev *idev;
2091 struct net_device *dev;
2092 int scope;
6f704992
YH		 2093 u32 flags;
2094 clock_t expires;
4bed72e4 2095 unsigned long timeout;
1da177e4
LT		 2096
2097 ASSERT_RTNL();
1ab1457c 2098
24ef0da7
TG		 2099 if (plen > 128)
2100 return -EINVAL;
2101
0778769d
NT		 2102 /* check the lifetime */
2103 if (!valid_lft || prefered_lft > valid_lft)
2104 return -EINVAL;
2105
af284937
DL		 2106 dev = __dev_get_by_index(net, ifindex);
2107 if (!dev)
1da177e4 2108 return -ENODEV;
1ab1457c 2109
1da177e4
LT		 2110 if ((idev = addrconf_add_dev(dev)) == NULL)
2111 return -ENOBUFS;
2112
2113 scope = ipv6_addr_scope(pfx);
2114
4bed72e4
YH		 2115 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2116 if (addrconf_finite_timeout(timeout)) {
2117 expires = jiffies_to_clock_t(timeout * HZ);
2118 valid_lft = timeout;
6f704992 2119 flags = RTF_EXPIRES;
4bed72e4
YH		 2120 } else {
2121 expires = 0;
2122 flags = 0;
2123 ifa_flags |= IFA_F_PERMANENT;
6f704992 2124 }
0778769d 2125
4bed72e4
YH		 2126 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2127 if (addrconf_finite_timeout(timeout)) {
2128 if (timeout == 0)
2129 ifa_flags |= IFA_F_DEPRECATED;
2130 prefered_lft = timeout;
2131 }
0778769d
NT		 2132
2133 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2134
1da177e4 2135 if (!IS_ERR(ifp)) {
06aebfb7 2136 spin_lock_bh(&ifp->lock);
0778769d
NT		 2137 ifp->valid_lft = valid_lft;
2138 ifp->prefered_lft = prefered_lft;
2139 ifp->tstamp = jiffies;
06aebfb7 2140 spin_unlock_bh(&ifp->lock);
0778769d 2141
46d48046 2142 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2143 expires, flags);
95c385b4
NH		 2144 /*
2145 * Note that section 3.1 of RFC 4429 indicates
2146 * that the Optimistic flag should not be set for
2147 * manually configured addresses
2148 */
1da177e4
LT		 2149 addrconf_dad_start(ifp, 0);
2150 in6_ifa_put(ifp);
0778769d 2151 addrconf_verify(0);
1da177e4
LT		 2152 return 0;
2153 }
2154
2155 return PTR_ERR(ifp);
2156}
2157
af284937 2158static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2159 unsigned int plen)
1da177e4
LT		 2160{
2161 struct inet6_ifaddr *ifp;
2162 struct inet6_dev *idev;
2163 struct net_device *dev;
1ab1457c 2164
24ef0da7
TG		 2165 if (plen > 128)
2166 return -EINVAL;
2167
af284937
DL		 2168 dev = __dev_get_by_index(net, ifindex);
2169 if (!dev)
1da177e4
LT		 2170 return -ENODEV;
2171
2172 if ((idev = __in6_dev_get(dev)) == NULL)
2173 return -ENXIO;
2174
2175 read_lock_bh(&idev->lock);
2176 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2177 if (ifp->prefix_len == plen &&
2178 ipv6_addr_equal(pfx, &ifp->addr)) {
2179 in6_ifa_hold(ifp);
2180 read_unlock_bh(&idev->lock);
1ab1457c 2181
1da177e4
LT		 2182 ipv6_del_addr(ifp);
2183
2184 /* If the last address is deleted administratively,
2185 disable IPv6 on this interface.
2186 */
2187 if (idev->addr_list == NULL)
2188 addrconf_ifdown(idev->dev, 1);
2189 return 0;
2190 }
2191 }
2192 read_unlock_bh(&idev->lock);
2193 return -EADDRNOTAVAIL;
2194}
2195
2196
af284937 2197int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2198{
2199 struct in6_ifreq ireq;
2200 int err;
1ab1457c 2201
1da177e4
LT		 2202 if (!capable(CAP_NET_ADMIN))
2203 return -EPERM;
1ab1457c 2204
1da177e4
LT		 2205 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2206 return -EFAULT;
2207
2208 rtnl_lock();
af284937
DL		 2209 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2210 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2211 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2212 rtnl_unlock();
2213 return err;
2214}
2215
af284937 2216int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2217{
2218 struct in6_ifreq ireq;
2219 int err;
1ab1457c 2220
1da177e4
LT		 2221 if (!capable(CAP_NET_ADMIN))
2222 return -EPERM;
2223
2224 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2225 return -EFAULT;
2226
2227 rtnl_lock();
af284937
DL		 2228 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2229 ireq.ifr6_prefixlen);
1da177e4
LT		 2230 rtnl_unlock();
2231 return err;
2232}
2233
b5f348e5
IJ		 2234static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2235 int plen, int scope)
2236{
2237 struct inet6_ifaddr *ifp;
2238
2239 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2240 if (!IS_ERR(ifp)) {
2241 spin_lock_bh(&ifp->lock);
2242 ifp->flags &= ~IFA_F_TENTATIVE;
2243 spin_unlock_bh(&ifp->lock);
2244 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2245 in6_ifa_put(ifp);
2246 }
2247}
2248
0be669bb 2249#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2250static void sit_add_v4_addrs(struct inet6_dev *idev)
2251{
1da177e4
LT		 2252 struct in6_addr addr;
2253 struct net_device *dev;
c346dca1 2254 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2255 int scope;
2256
2257 ASSERT_RTNL();
2258
2259 memset(&addr, 0, sizeof(struct in6_addr));
2260 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2261
2262 if (idev->dev->flags&IFF_POINTOPOINT) {
2263 addr.s6_addr32[0] = htonl(0xfe800000);
2264 scope = IFA_LINK;
2265 } else {
2266 scope = IPV6_ADDR_COMPATv4;
2267 }
2268
2269 if (addr.s6_addr32[3]) {
b5f348e5 2270 add_addr(idev, &addr, 128, scope);
1da177e4
LT		 2271 return;
2272 }
2273
6fda7350 2274 for_each_netdev(net, dev) {
e5ed6399 2275 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2276 if (in_dev && (dev->flags & IFF_UP)) {
2277 struct in_ifaddr * ifa;
2278
2279 int flag = scope;
2280
2281 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2282 int plen;
2283
2284 addr.s6_addr32[3] = ifa->ifa_local;
2285
2286 if (ifa->ifa_scope == RT_SCOPE_LINK)
2287 continue;
2288 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2289 if (idev->dev->flags&IFF_POINTOPOINT)
2290 continue;
2291 flag |= IFA_HOST;
2292 }
2293 if (idev->dev->flags&IFF_POINTOPOINT)
2294 plen = 64;
2295 else
2296 plen = 96;
2297
b5f348e5 2298 add_addr(idev, &addr, plen, flag);
1da177e4
LT		 2299 }
2300 }
1ab1457c 2301 }
1da177e4 2302}
0be669bb 2303#endif
1da177e4
LT		 2304
2305static void init_loopback(struct net_device *dev)
2306{
2307 struct inet6_dev *idev;
1da177e4
LT		 2308
2309 /* ::1 */
2310
2311 ASSERT_RTNL();
2312
2313 if ((idev = ipv6_find_idev(dev)) == NULL) {
2314 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2315 return;
2316 }
2317
b5f348e5 2318 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
1da177e4
LT		 2319}
2320
2321static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2322{
2323 struct inet6_ifaddr * ifp;
95c385b4
NH		 2324 u32 addr_flags = IFA_F_PERMANENT;
2325
2326#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2327 if (idev->cnf.optimistic_dad &&
702beb87 2328 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
95c385b4
NH		 2329 addr_flags |= IFA_F_OPTIMISTIC;
2330#endif
1da177e4 2331
95c385b4
NH		 2332
2333 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2334 if (!IS_ERR(ifp)) {
46d48046 2335 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2336 addrconf_dad_start(ifp, 0);
2337 in6_ifa_put(ifp);
2338 }
2339}
2340
2341static void addrconf_dev_config(struct net_device *dev)
2342{
2343 struct in6_addr addr;
2344 struct inet6_dev * idev;
2345
2346 ASSERT_RTNL();
2347
74235a25
HX		 2348 if ((dev->type != ARPHRD_ETHER) &&
2349 (dev->type != ARPHRD_FDDI) &&
2350 (dev->type != ARPHRD_IEEE802_TR) &&
2351 (dev->type != ARPHRD_ARCNET) &&
2352 (dev->type != ARPHRD_INFINIBAND)) {
2353 /* Alas, we support only Ethernet autoconfiguration. */
2354 return;
2355 }
2356
1da177e4
LT		 2357 idev = addrconf_add_dev(dev);
2358 if (idev == NULL)
2359 return;
2360
2361 memset(&addr, 0, sizeof(struct in6_addr));
2362 addr.s6_addr32[0] = htonl(0xFE800000);
2363
2364 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2365 addrconf_add_linklocal(idev, &addr);
2366}
2367
0be669bb 2368#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2369static void addrconf_sit_config(struct net_device *dev)
2370{
2371 struct inet6_dev *idev;
2372
2373 ASSERT_RTNL();
2374
1ab1457c
YH		 2375 /*
2376 * Configure the tunnel with one of our IPv4
2377 * addresses... we should configure all of
1da177e4
LT		 2378 * our v4 addrs in the tunnel
2379 */
2380
2381 if ((idev = ipv6_find_idev(dev)) == NULL) {
2382 printk(KERN_DEBUG "init sit: add_dev failed\n");
2383 return;
2384 }
2385
c7dc89c0
FT		 2386 if (dev->priv_flags & IFF_ISATAP) {
2387 struct in6_addr addr;
2388
2389 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2390 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2391 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2392 addrconf_add_linklocal(idev, &addr);
2393 return;
2394 }
2395
1da177e4
LT		 2396 sit_add_v4_addrs(idev);
2397
2398 if (dev->flags&IFF_POINTOPOINT) {
2399 addrconf_add_mroute(dev);
2400 addrconf_add_lroute(dev);
2401 } else
2402 sit_route_add(dev);
2403}
0be669bb 2404#endif
1da177e4
LT		 2405
2406static inline int
2407ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2408{
2409 struct in6_addr lladdr;
2410
95c385b4 2411 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2412 addrconf_add_linklocal(idev, &lladdr);
2413 return 0;
2414 }
2415 return -1;
2416}
2417
2418static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2419{
2420 struct net_device *link_dev;
c346dca1 2421 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2422
2423 /* first try to inherit the link-local address from the link device */
2424 if (idev->dev->iflink &&
6fda7350 2425 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2426 if (!ipv6_inherit_linklocal(idev, link_dev))
2427 return;
2428 }
2429 /* then try to inherit it from any device */
6fda7350 2430 for_each_netdev(net, link_dev) {
1da177e4
LT		 2431 if (!ipv6_inherit_linklocal(idev, link_dev))
2432 return;
2433 }
2434 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2435}
2436
2437/*
2438 * Autoconfigure tunnel with a link-local address so routing protocols,
2439 * DHCPv6, MLD etc. can be run over the virtual link
2440 */
2441
2442static void addrconf_ip6_tnl_config(struct net_device *dev)
2443{
2444 struct inet6_dev *idev;
2445
2446 ASSERT_RTNL();
2447
2448 if ((idev = addrconf_add_dev(dev)) == NULL) {
2449 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2450 return;
2451 }
2452 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2453}
2454
1ab1457c 2455static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2456 void * data)
2457{
2458 struct net_device *dev = (struct net_device *) data;
74235a25 2459 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2460 int run_pending = 0;
b217d616 2461 int err;
1da177e4
LT		 2462
2463 switch(event) {
45ba9dd2 2464 case NETDEV_REGISTER:
74235a25 2465 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2466 idev = ipv6_add_dev(dev);
2467 if (!idev)
b217d616 2468 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2469 }
2470 break;
1da177e4 2471 case NETDEV_UP:
3c21edbd 2472 case NETDEV_CHANGE:
c2edacf8
JV		 2473 if (dev->flags & IFF_SLAVE)
2474 break;
2475
3c21edbd 2476 if (event == NETDEV_UP) {
f24e3d65 2477 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2478 /* device is not ready yet. */
2479 printk(KERN_INFO
2480 "ADDRCONF(NETDEV_UP): %s: "
2481 "link is not ready\n",
2482 dev->name);
2483 break;
2484 }
99081049 2485
d31c7b8f
EP		 2486 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2487 idev = ipv6_add_dev(dev);
2488
e3ec6cfc 2489 if (idev) {
99081049 2490 idev->if_flags |= IF_READY;
e3ec6cfc
BT		 2491 run_pending = 1;
2492 }
3c21edbd 2493 } else {
f24e3d65 2494 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2495 /* device is still not ready. */
2496 break;
2497 }
2498
2499 if (idev) {
2500 if (idev->if_flags & IF_READY) {
2501 /* device is already configured. */
2502 break;
2503 }
2504 idev->if_flags |= IF_READY;
2505 }
2506
2507 printk(KERN_INFO
2508 "ADDRCONF(NETDEV_CHANGE): %s: "
2509 "link becomes ready\n",
2510 dev->name);
2511
c5e33bdd 2512 run_pending = 1;
3c21edbd
YH		 2513 }
2514
1da177e4 2515 switch(dev->type) {
0be669bb 2516#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2517 case ARPHRD_SIT:
2518 addrconf_sit_config(dev);
2519 break;
0be669bb 2520#endif
1da177e4
LT		 2521 case ARPHRD_TUNNEL6:
2522 addrconf_ip6_tnl_config(dev);
2523 break;
2524 case ARPHRD_LOOPBACK:
2525 init_loopback(dev);
2526 break;
2527
2528 default:
2529 addrconf_dev_config(dev);
2530 break;
3ff50b79 2531 }
1da177e4 2532 if (idev) {
c5e33bdd
YH		 2533 if (run_pending)
2534 addrconf_dad_run(idev);
2535
1da177e4
LT		 2536 /* If the MTU changed during the interface down, when the
2537 interface up, the changed MTU must be reflected in the
2538 idev as well as routers.
2539 */
2540 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2541 rt6_mtu_change(dev, dev->mtu);
2542 idev->cnf.mtu6 = dev->mtu;
2543 }
2544 idev->tstamp = jiffies;
2545 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2546 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2547 stop IPv6 on this interface.
2548 */
2549 if (dev->mtu < IPV6_MIN_MTU)
2550 addrconf_ifdown(dev, event != NETDEV_DOWN);
2551 }
2552 break;
2553
2554 case NETDEV_CHANGEMTU:
d31c7b8f 2555 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2556 rt6_mtu_change(dev, dev->mtu);
2557 idev->cnf.mtu6 = dev->mtu;
2558 break;
2559 }
2560
d31c7b8f
EP		 2561 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2562 idev = ipv6_add_dev(dev);
2563 if (idev)
2564 break;
2565 }
2566
1da177e4
LT		 2567 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2568
2569 case NETDEV_DOWN:
2570 case NETDEV_UNREGISTER:
2571 /*
2572 * Remove all addresses from this interface.
2573 */
2574 addrconf_ifdown(dev, event != NETDEV_DOWN);
2575 break;
3c21edbd 2576
1da177e4 2577 case NETDEV_CHANGENAME:
1da177e4 2578 if (idev) {
5632c515 2579 snmp6_unregister_dev(idev);
408c4768 2580 addrconf_sysctl_unregister(idev);
f52295a9 2581 addrconf_sysctl_register(idev);
b217d616
HX		 2582 err = snmp6_register_dev(idev);
2583 if (err)
2584 return notifier_from_errno(err);
5632c515 2585 }
1da177e4 2586 break;
75c78500
MS		 2587 case NETDEV_BONDING_OLDTYPE:
2588 case NETDEV_BONDING_NEWTYPE:
2589 addrconf_bonding_change(dev, event);
2590 break;
3ff50b79 2591 }
1da177e4
LT		 2592
2593 return NOTIFY_OK;
2594}
2595
2596/*
2597 * addrconf module should be notified of a device going up
2598 */
2599static struct notifier_block ipv6_dev_notf = {
2600 .notifier_call = addrconf_notify,
2601 .priority = 0
2602};
2603
75c78500
MS		 2604static void addrconf_bonding_change(struct net_device *dev, unsigned long event)
2605{
2606 struct inet6_dev *idev;
2607 ASSERT_RTNL();
2608
2609 idev = __in6_dev_get(dev);
2610
2611 if (event == NETDEV_BONDING_NEWTYPE)
2612 ipv6_mc_remap(idev);
2613 else if (event == NETDEV_BONDING_OLDTYPE)
2614 ipv6_mc_unmap(idev);
2615}
2616
1da177e4
LT		 2617static int addrconf_ifdown(struct net_device *dev, int how)
2618{
2619 struct inet6_dev *idev;
8f37ada5 2620 struct inet6_ifaddr *ifa, *keep_list, **bifa;
c346dca1 2621 struct net *net = dev_net(dev);
1da177e4
LT		 2622 int i;
2623
2624 ASSERT_RTNL();
2625
f3db4851 2626 rt6_ifdown(net, dev);
1da177e4
LT		 2627 neigh_ifdown(&nd_tbl, dev);
2628
2629 idev = __in6_dev_get(dev);
2630 if (idev == NULL)
2631 return -ENODEV;
2632
2633 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2634 Do not dev_put!
1da177e4 2635 */
439e2385 2636 if (how) {
1da177e4 2637 idev->dead = 1;
8814c4b5
YH		 2638
2639 /* protected by rtnl_lock */
2640 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2641
2642 /* Step 1.5: remove snmp6 entry */
2643 snmp6_unregister_dev(idev);
2644
2645 }
2646
2647 /* Step 2: clear hash table */
2648 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2649 bifa = &inet6_addr_lst[i];
2650
2651 write_lock_bh(&addrconf_hash_lock);
2652 while ((ifa = *bifa) != NULL) {
dc2b99f7 2653 if (ifa->idev == idev &&
84e8b803 2654 (how || !(ifa->flags&IFA_F_PERMANENT) ||
2655 ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2656 *bifa = ifa->lst_next;
2657 ifa->lst_next = NULL;
84e8b803 2658 __in6_ifa_put(ifa);
1da177e4
LT		 2659 continue;
2660 }
2661 bifa = &ifa->lst_next;
2662 }
2663 write_unlock_bh(&addrconf_hash_lock);
2664 }
2665
2666 write_lock_bh(&idev->lock);
2667
2668 /* Step 3: clear flags for stateless addrconf */
439e2385 2669 if (!how)
3c21edbd 2670 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2671
2672 /* Step 4: clear address list */
2673#ifdef CONFIG_IPV6_PRIVACY
439e2385 2674 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2675 in6_dev_put(idev);
2676
2677 /* clear tempaddr list */
2678 while ((ifa = idev->tempaddr_list) != NULL) {
2679 idev->tempaddr_list = ifa->tmp_next;
2680 ifa->tmp_next = NULL;
2681 ifa->dead = 1;
2682 write_unlock_bh(&idev->lock);
2683 spin_lock_bh(&ifa->lock);
2684
2685 if (ifa->ifpub) {
2686 in6_ifa_put(ifa->ifpub);
2687 ifa->ifpub = NULL;
2688 }
2689 spin_unlock_bh(&ifa->lock);
2690 in6_ifa_put(ifa);
2691 write_lock_bh(&idev->lock);
2692 }
2693#endif
8f37ada5 2694 keep_list = NULL;
2695 bifa = &keep_list;
2696 while ((ifa = idev->addr_list) != NULL) {
2697 idev->addr_list = ifa->if_next;
2698 ifa->if_next = NULL;
2699
84e8b803 2700 addrconf_del_timer(ifa);
2701
2702 /* If just doing link down, and address is permanent
2703 and not link-local, then retain it. */
2704 if (how == 0 &&
2705 (ifa->flags&IFA_F_PERMANENT) &&
2706 !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
8f37ada5 2707
2708 /* Move to holding list */
2709 *bifa = ifa;
dc2b99f7 2710 bifa = &ifa->if_next;
2711
84e8b803 2712 /* If not doing DAD on this address, just keep it. */
2713 if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) ||
2714 idev->cnf.accept_dad <= 0 ||
2715 (ifa->flags & IFA_F_NODAD))
2716 continue;
2717
2718 /* If it was tentative already, no need to notify */
2719 if (ifa->flags & IFA_F_TENTATIVE)
2720 continue;
2721
2722 /* Flag it for later restoration when link comes up */
2723 ifa->flags |= IFA_F_TENTATIVE;
2724 in6_ifa_hold(ifa);
dc2b99f7 2725 } else {
dc2b99f7 2726 ifa->dead = 1;
84e8b803 2727 }
2728 write_unlock_bh(&idev->lock);
1da177e4 2729
84e8b803 2730 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2731 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
2732 in6_ifa_put(ifa);
dc2b99f7 2733
84e8b803 2734 write_lock_bh(&idev->lock);
1da177e4 2735 }
8f37ada5 2736
2737 idev->addr_list = keep_list;
2738
1da177e4
LT		 2739 write_unlock_bh(&idev->lock);
2740
2741 /* Step 5: Discard multicast list */
2742
439e2385 2743 if (how)
1da177e4
LT		 2744 ipv6_mc_destroy_dev(idev);
2745 else
2746 ipv6_mc_down(idev);
2747
1da177e4 2748 idev->tstamp = jiffies;
1ab1457c 2749
1da177e4
LT		 2750 /* Shot the device (if unregistered) */
2751
439e2385 2752 if (how) {
408c4768 2753 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2754 neigh_parms_release(&nd_tbl, idev->nd_parms);
2755 neigh_ifdown(&nd_tbl, dev);
2756 in6_dev_put(idev);
2757 }
2758 return 0;
2759}
2760
2761static void addrconf_rs_timer(unsigned long data)
2762{
2763 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
5b2a1953 2764 struct inet6_dev *idev = ifp->idev;
1da177e4 2765
5b2a1953 2766 read_lock(&idev->lock);
2767 if (idev->dead || !(idev->if_flags & IF_READY))
1da177e4
LT		 2768 goto out;
2769
5b2a1953 2770 if (idev->cnf.forwarding)
2771 goto out;
2772
2773 /* Announcement received after solicitation was sent */
2774 if (idev->if_flags & IF_RA_RCVD)
1da177e4 2775 goto out;
1da177e4
LT		 2776
2777 spin_lock(&ifp->lock);
5b2a1953 2778 if (ifp->probes++ < idev->cnf.rtr_solicits) {
1da177e4
LT		 2779 /* The wait after the last probe can be shorter */
2780 addrconf_mod_timer(ifp, AC_RS,
5b2a1953 2781 (ifp->probes == idev->cnf.rtr_solicits) ?
2782 idev->cnf.rtr_solicit_delay :
2783 idev->cnf.rtr_solicit_interval);
1da177e4
LT		 2784 spin_unlock(&ifp->lock);
2785
5b2a1953 2786 ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2787 } else {
2788 spin_unlock(&ifp->lock);
2789 /*
2790 * Note: we do not support deprecated "all on-link"
2791 * assumption any longer.
2792 */
2793 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
5b2a1953 2794 idev->dev->name);
1da177e4
LT		 2795 }
2796
2797out:
5b2a1953 2798 read_unlock(&idev->lock);
1da177e4
LT		 2799 in6_ifa_put(ifp);
2800}
2801
2802/*
2803 * Duplicate Address Detection
2804 */
3c21edbd
YH		 2805static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2806{
2807 unsigned long rand_num;
2808 struct inet6_dev *idev = ifp->idev;
2809
95c385b4
NH		 2810 if (ifp->flags & IFA_F_OPTIMISTIC)
2811 rand_num = 0;
2812 else
2813 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2814
3c21edbd
YH		 2815 ifp->probes = idev->cnf.dad_transmits;
2816 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2817}
2818
e431b8c0 2819static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2820{
2821 struct inet6_dev *idev = ifp->idev;
2822 struct net_device *dev = idev->dev;
1da177e4
LT		 2823
2824 addrconf_join_solict(dev, &ifp->addr);
2825
1da177e4 2826 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2827
2828 read_lock_bh(&idev->lock);
2829 if (ifp->dead)
2830 goto out;
1da177e4 2831
21809faf 2832 spin_lock(&ifp->lock);
1da177e4 2833 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2834 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2835 !(ifp->flags&IFA_F_TENTATIVE) ||
2836 ifp->flags & IFA_F_NODAD) {
cc411d0b 2837 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2838 spin_unlock(&ifp->lock);
1da177e4
LT		 2839 read_unlock_bh(&idev->lock);
2840
2841 addrconf_dad_completed(ifp);
2842 return;
2843 }
2844
6732bade 2845 if (!(idev->if_flags & IF_READY)) {
21809faf 2846 spin_unlock(&ifp->lock);
6732bade 2847 read_unlock_bh(&idev->lock);
3c21edbd 2848 /*
590a9887 2849 * If the device is not ready:
3c21edbd
YH		 2850 * - keep it tentative if it is a permanent address.
2851 * - otherwise, kill it.
2852 */
2853 in6_ifa_hold(ifp);
cc411d0b 2854 addrconf_dad_stop(ifp, 0);
6732bade 2855 return;
3c21edbd 2856 }
95c385b4
NH		 2857
2858 /*
2859 * Optimistic nodes can start receiving
2860 * Frames right away
2861 */
2862 if(ifp->flags & IFA_F_OPTIMISTIC)
2863 ip6_ins_rt(ifp->rt);
2864
6732bade 2865 addrconf_dad_kick(ifp);
21809faf 2866 spin_unlock(&ifp->lock);
1da177e4
LT		 2867out:
2868 read_unlock_bh(&idev->lock);
2869}
2870
2871static void addrconf_dad_timer(unsigned long data)
2872{
2873 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2874 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2875 struct in6_addr mcaddr;
2876
122e4519 2877 read_lock(&idev->lock);
2878 if (idev->dead || !(idev->if_flags & IF_READY)) {
2879 read_unlock(&idev->lock);
1da177e4
LT		 2880 goto out;
2881 }
21809faf 2882
2883 spin_lock(&ifp->lock);
1da177e4
LT		 2884 if (ifp->probes == 0) {
2885 /*
2886 * DAD was successful
2887 */
2888
cc411d0b 2889 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2890 spin_unlock(&ifp->lock);
122e4519 2891 read_unlock(&idev->lock);
1da177e4
LT		 2892
2893 addrconf_dad_completed(ifp);
2894
2895 goto out;
2896 }
2897
2898 ifp->probes--;
2899 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
21809faf 2900 spin_unlock(&ifp->lock);
122e4519 2901 read_unlock(&idev->lock);
1da177e4
LT		 2902
2903 /* send a neighbour solicitation for our addr */
1da177e4 2904 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 2905 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 2906out:
2907 in6_ifa_put(ifp);
2908}
2909
2910static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2911{
2912 struct net_device * dev = ifp->idev->dev;
2913
2914 /*
2915 * Configure the address for reception. Now it is valid.
2916 */
2917
2918 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2919
2920 /* If added prefix is link local and forwarding is off,
2921 start sending router solicitations.
2922 */
2923
2924 if (ifp->idev->cnf.forwarding == 0 &&
2925 ifp->idev->cnf.rtr_solicits > 0 &&
2926 (dev->flags&IFF_LOOPBACK) == 0 &&
2927 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2928 /*
2929 * If a host as already performed a random delay
2930 * [...] as part of DAD [...] there is no need
2931 * to delay again before sending the first RS
2932 */
f3ee4010 2933 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2934
2935 spin_lock_bh(&ifp->lock);
2936 ifp->probes = 1;
2937 ifp->idev->if_flags |= IF_RS_SENT;
2938 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2939 spin_unlock_bh(&ifp->lock);
2940 }
2941}
2942
c5e33bdd
YH		 2943static void addrconf_dad_run(struct inet6_dev *idev) {
2944 struct inet6_ifaddr *ifp;
2945
2946 read_lock_bh(&idev->lock);
2947 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
21809faf 2948 spin_lock(&ifp->lock);
c5e33bdd 2949 if (!(ifp->flags & IFA_F_TENTATIVE)) {
21809faf 2950 spin_unlock(&ifp->lock);
c5e33bdd
YH		 2951 continue;
2952 }
21809faf 2953 spin_unlock(&ifp->lock);
c5e33bdd
YH		 2954 addrconf_dad_kick(ifp);
2955 }
2956 read_unlock_bh(&idev->lock);
2957}
2958
1da177e4
LT		 2959#ifdef CONFIG_PROC_FS
2960struct if6_iter_state {
3c40090a 2961 struct seq_net_private p;
1da177e4
LT		 2962 int bucket;
2963};
2964
2965static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2966{
2967 struct inet6_ifaddr *ifa = NULL;
2968 struct if6_iter_state *state = seq->private;
1218854a 2969 struct net *net = seq_file_net(seq);
1da177e4
LT		 2970
2971 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2972 ifa = inet6_addr_lst[state->bucket];
3c40090a 2973
878628fb 2974 while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
3c40090a 2975 ifa = ifa->lst_next;
1da177e4
LT		 2976 if (ifa)
2977 break;
2978 }
2979 return ifa;
2980}
2981
2982static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2983{
2984 struct if6_iter_state *state = seq->private;
1218854a 2985 struct net *net = seq_file_net(seq);
1da177e4
LT		 2986
2987 ifa = ifa->lst_next;
2988try_again:
3c40090a 2989 if (ifa) {
878628fb 2990 if (!net_eq(dev_net(ifa->idev->dev), net)) {
3c40090a
DL		 2991 ifa = ifa->lst_next;
2992 goto try_again;
2993 }
2994 }
2995
1da177e4
LT		 2996 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2997 ifa = inet6_addr_lst[state->bucket];
2998 goto try_again;
2999 }
3c40090a 3000
1da177e4
LT		 3001 return ifa;
3002}
3003
3004static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
3005{
3006 struct inet6_ifaddr *ifa = if6_get_first(seq);
3007
3008 if (ifa)
3009 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
3010 --pos;
3011 return pos ? NULL : ifa;
3012}
3013
3014static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
d20b3109 3015 __acquires(addrconf_hash_lock)
1da177e4
LT		 3016{
3017 read_lock_bh(&addrconf_hash_lock);
3018 return if6_get_idx(seq, *pos);
3019}
3020
3021static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3022{
3023 struct inet6_ifaddr *ifa;
3024
3025 ifa = if6_get_next(seq, v);
3026 ++*pos;
3027 return ifa;
3028}
3029
3030static void if6_seq_stop(struct seq_file *seq, void *v)
d20b3109 3031 __releases(addrconf_hash_lock)
1da177e4
LT		 3032{
3033 read_unlock_bh(&addrconf_hash_lock);
3034}
3035
3036static int if6_seq_show(struct seq_file *seq, void *v)
3037{
3038 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
4b7a4274 3039 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
b071195d 3040 &ifp->addr,
1da177e4
LT		 3041 ifp->idev->dev->ifindex,
3042 ifp->prefix_len,
3043 ifp->scope,
3044 ifp->flags,
3045 ifp->idev->dev->name);
3046 return 0;
3047}
3048
56b3d975 3049static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 3050 .start = if6_seq_start,
3051 .next = if6_seq_next,
3052 .show = if6_seq_show,
3053 .stop = if6_seq_stop,
3054};
3055
3056static int if6_seq_open(struct inode *inode, struct file *file)
3057{
3c40090a
DL		 3058 return seq_open_net(inode, file, &if6_seq_ops,
3059 sizeof(struct if6_iter_state));
1da177e4
LT		 3060}
3061
9a32144e 3062static const struct file_operations if6_fops = {
1da177e4
LT		 3063 .owner = THIS_MODULE,
3064 .open = if6_seq_open,
3065 .read = seq_read,
3066 .llseek = seq_lseek,
3c40090a 3067 .release = seq_release_net,
1da177e4
LT		 3068};
3069
2c8c1e72 3070static int __net_init if6_proc_net_init(struct net *net)
1da177e4 3071{
3c40090a 3072 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 3073 return -ENOMEM;
3074 return 0;
3075}
3076
2c8c1e72 3077static void __net_exit if6_proc_net_exit(struct net *net)
3c40090a
DL		 3078{
3079 proc_net_remove(net, "if_inet6");
3080}
3081
3082static struct pernet_operations if6_proc_net_ops = {
3083 .init = if6_proc_net_init,
3084 .exit = if6_proc_net_exit,
3085};
3086
3087int __init if6_proc_init(void)
3088{
3089 return register_pernet_subsys(&if6_proc_net_ops);
3090}
3091
1da177e4
LT		 3092void if6_proc_exit(void)
3093{
3c40090a 3094 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3095}
3096#endif /* CONFIG_PROC_FS */
3097
59fbb3a6 3098#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3099/* Check if address is a home address configured on any interface. */
389f6612 3100int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 3101{
3102 int ret = 0;
3103 struct inet6_ifaddr * ifp;
3104 u8 hash = ipv6_addr_hash(addr);
3105 read_lock_bh(&addrconf_hash_lock);
3106 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
878628fb 3107 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3108 continue;
caad295f 3109 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3110 (ifp->flags & IFA_F_HOMEADDRESS)) {
3111 ret = 1;
3112 break;
3113 }
3114 }
3115 read_unlock_bh(&addrconf_hash_lock);
3116 return ret;
3117}
3118#endif
3119
1da177e4
LT		 3120/*
3121 * Periodic address status verification
3122 */
3123
3124static void addrconf_verify(unsigned long foo)
3125{
3126 struct inet6_ifaddr *ifp;
3127 unsigned long now, next;
3128 int i;
3129
3130 spin_lock_bh(&addrconf_verify_lock);
3131 now = jiffies;
3132 next = now + ADDR_CHECK_FREQUENCY;
3133
3134 del_timer(&addr_chk_timer);
3135
3136 for (i=0; i < IN6_ADDR_HSIZE; i++) {
3137
3138restart:
5d5780df 3139 read_lock(&addrconf_hash_lock);
1da177e4
LT		 3140 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
3141 unsigned long age;
3142#ifdef CONFIG_IPV6_PRIVACY
3143 unsigned long regen_advance;
3144#endif
3145
3146 if (ifp->flags & IFA_F_PERMANENT)
3147 continue;
3148
3149 spin_lock(&ifp->lock);
3150 age = (now - ifp->tstamp) / HZ;
3151
3152#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 3153 regen_advance = ifp->idev->cnf.regen_max_retry *
3154 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 3155 ifp->idev->nd_parms->retrans_time / HZ;
3156#endif
3157
8f27ebb9
YH		 3158 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3159 age >= ifp->valid_lft) {
1da177e4
LT		 3160 spin_unlock(&ifp->lock);
3161 in6_ifa_hold(ifp);
5d5780df 3162 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3163 ipv6_del_addr(ifp);
3164 goto restart;
8f27ebb9
YH		 3165 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3166 spin_unlock(&ifp->lock);
3167 continue;
1da177e4 3168 } else if (age >= ifp->prefered_lft) {
a1ed0526 3169 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
1da177e4
LT		 3170 int deprecate = 0;
3171
3172 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3173 deprecate = 1;
3174 ifp->flags |= IFA_F_DEPRECATED;
3175 }
3176
3177 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3178 next = ifp->tstamp + ifp->valid_lft * HZ;
3179
3180 spin_unlock(&ifp->lock);
3181
3182 if (deprecate) {
3183 in6_ifa_hold(ifp);
5d5780df 3184 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3185
3186 ipv6_ifa_notify(0, ifp);
3187 in6_ifa_put(ifp);
3188 goto restart;
3189 }
3190#ifdef CONFIG_IPV6_PRIVACY
3191 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3192 !(ifp->flags&IFA_F_TENTATIVE)) {
3193 if (age >= ifp->prefered_lft - regen_advance) {
3194 struct inet6_ifaddr *ifpub = ifp->ifpub;
3195 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3196 next = ifp->tstamp + ifp->prefered_lft * HZ;
3197 if (!ifp->regen_count && ifpub) {
3198 ifp->regen_count++;
3199 in6_ifa_hold(ifp);
3200 in6_ifa_hold(ifpub);
3201 spin_unlock(&ifp->lock);
5d5780df 3202 read_unlock(&addrconf_hash_lock);
291d809b
HY		 3203 spin_lock(&ifpub->lock);
3204 ifpub->regen_count = 0;
3205 spin_unlock(&ifpub->lock);
1da177e4
LT		 3206 ipv6_create_tempaddr(ifpub, ifp);
3207 in6_ifa_put(ifpub);
3208 in6_ifa_put(ifp);
3209 goto restart;
3210 }
3211 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3212 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3213 spin_unlock(&ifp->lock);
3214#endif
3215 } else {
3216 /* ifp->prefered_lft <= ifp->valid_lft */
3217 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3218 next = ifp->tstamp + ifp->prefered_lft * HZ;
3219 spin_unlock(&ifp->lock);
3220 }
3221 }
5d5780df 3222 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3223 }
3224
3225 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3226 add_timer(&addr_chk_timer);
3227 spin_unlock_bh(&addrconf_verify_lock);
3228}
3229
461d8837
TG		 3230static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3231{
3232 struct in6_addr *pfx = NULL;
3233
3234 if (addr)
3235 pfx = nla_data(addr);
3236
3237 if (local) {
3238 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3239 pfx = NULL;
3240 else
3241 pfx = nla_data(local);
3242 }
3243
3244 return pfx;
3245}
3246
ef7c79ed 3247static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3248 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3249 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3250 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3251};
3252
1da177e4
LT		 3253static int
3254inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3255{
3b1e0a65 3256 struct net *net = sock_net(skb->sk);
b933f716
TG		 3257 struct ifaddrmsg *ifm;
3258 struct nlattr *tb[IFA_MAX+1];
1da177e4 3259 struct in6_addr *pfx;
b933f716 3260 int err;
1da177e4 3261
b933f716
TG		 3262 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3263 if (err < 0)
3264 return err;
3265
3266 ifm = nlmsg_data(nlh);
3267 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3268 if (pfx == NULL)
3269 return -EINVAL;
3270
af284937 3271 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3272}
3273
55ebaef1
NT		 3274static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3275 u32 prefered_lft, u32 valid_lft)
081bba5b 3276{
6f704992
YH		 3277 u32 flags;
3278 clock_t expires;
4bed72e4 3279 unsigned long timeout;
46d48046 3280
081bba5b
NT		 3281 if (!valid_lft || (prefered_lft > valid_lft))
3282 return -EINVAL;
3283
4bed72e4
YH		 3284 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3285 if (addrconf_finite_timeout(timeout)) {
3286 expires = jiffies_to_clock_t(timeout * HZ);
3287 valid_lft = timeout;
6f704992 3288 flags = RTF_EXPIRES;
4bed72e4
YH		 3289 } else {
3290 expires = 0;
3291 flags = 0;
3292 ifa_flags |= IFA_F_PERMANENT;
6f704992 3293 }
081bba5b 3294
4bed72e4
YH		 3295 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3296 if (addrconf_finite_timeout(timeout)) {
3297 if (timeout == 0)
3298 ifa_flags |= IFA_F_DEPRECATED;
3299 prefered_lft = timeout;
3300 }
081bba5b
NT		 3301
3302 spin_lock_bh(&ifp->lock);
3b9f9a1c 3303 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3304 ifp->tstamp = jiffies;
3305 ifp->valid_lft = valid_lft;
3306 ifp->prefered_lft = prefered_lft;
3307
3308 spin_unlock_bh(&ifp->lock);
3309 if (!(ifp->flags&IFA_F_TENTATIVE))
3310 ipv6_ifa_notify(0, ifp);
081bba5b 3311
46d48046 3312 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3313 expires, flags);
081bba5b
NT		 3314 addrconf_verify(0);
3315
3316 return 0;
3317}
3318
1da177e4
LT		 3319static int
3320inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3321{
3b1e0a65 3322 struct net *net = sock_net(skb->sk);
461d8837
TG		 3323 struct ifaddrmsg *ifm;
3324 struct nlattr *tb[IFA_MAX+1];
1da177e4 3325 struct in6_addr *pfx;
7198f8ce
TG		 3326 struct inet6_ifaddr *ifa;
3327 struct net_device *dev;
55ebaef1
NT		 3328 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3329 u8 ifa_flags;
461d8837 3330 int err;
1da177e4 3331
461d8837
TG		 3332 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3333 if (err < 0)
3334 return err;
3335
3336 ifm = nlmsg_data(nlh);
3337 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3338 if (pfx == NULL)
3339 return -EINVAL;
3340
461d8837 3341 if (tb[IFA_CACHEINFO]) {
0778769d 3342 struct ifa_cacheinfo *ci;
461d8837
TG		 3343
3344 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3345 valid_lft = ci->ifa_valid;
461d8837
TG		 3346 preferred_lft = ci->ifa_prefered;
3347 } else {
3348 preferred_lft = INFINITY_LIFE_TIME;
3349 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3350 }
3351
af284937 3352 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3353 if (dev == NULL)
3354 return -ENODEV;
3355
55ebaef1 3356 /* We ignore other flags so far. */
3b9f9a1c 3357 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3358
1cab3da6 3359 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3360 if (ifa == NULL) {
3361 /*
3362 * It would be best to check for !NLM_F_CREATE here but
3363 * userspace alreay relies on not having to provide this.
3364 */
af284937
DL		 3365 return inet6_addr_add(net, ifm->ifa_index, pfx,
3366 ifm->ifa_prefixlen, ifa_flags,
3367 preferred_lft, valid_lft);
081bba5b
NT		 3368 }
3369
7198f8ce
TG		 3370 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3371 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3372 err = -EEXIST;
3373 else
55ebaef1 3374 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3375
3376 in6_ifa_put(ifa);
3377
3378 return err;
1da177e4
LT		 3379}
3380
101bb229
TG		 3381static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3382 u8 scope, int ifindex)
3383{
3384 struct ifaddrmsg *ifm;
3385
3386 ifm = nlmsg_data(nlh);
3387 ifm->ifa_family = AF_INET6;
3388 ifm->ifa_prefixlen = prefixlen;
3389 ifm->ifa_flags = flags;
3390 ifm->ifa_scope = scope;
3391 ifm->ifa_index = ifindex;
3392}
3393
85486af0
TG		 3394static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3395 unsigned long tstamp, u32 preferred, u32 valid)
3396{
3397 struct ifa_cacheinfo ci;
3398
3399 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3400 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3401 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3402 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3403 ci.ifa_prefered = preferred;
3404 ci.ifa_valid = valid;
3405
3406 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3407}
3408
101bb229
TG		 3409static inline int rt_scope(int ifa_scope)
3410{
3411 if (ifa_scope & IFA_HOST)
3412 return RT_SCOPE_HOST;
3413 else if (ifa_scope & IFA_LINK)
3414 return RT_SCOPE_LINK;
3415 else if (ifa_scope & IFA_SITE)
3416 return RT_SCOPE_SITE;
3417 else
3418 return RT_SCOPE_UNIVERSE;
3419}
3420
0ab6803b
TG		 3421static inline int inet6_ifaddr_msgsize(void)
3422{
339bf98f
TG		 3423 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3424 + nla_total_size(16) /* IFA_ADDRESS */
3425 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3426}
c5396a31 3427
1da177e4 3428static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3429 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3430{
1da177e4 3431 struct nlmsghdr *nlh;
85486af0 3432 u32 preferred, valid;
1da177e4 3433
0ab6803b
TG		 3434 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3435 if (nlh == NULL)
26932566 3436 return -EMSGSIZE;
0ab6803b 3437
101bb229
TG		 3438 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3439 ifa->idev->dev->ifindex);
3440
1da177e4 3441 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3442 preferred = ifa->prefered_lft;
3443 valid = ifa->valid_lft;
3444 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3445 long tval = (jiffies - ifa->tstamp)/HZ;
a1faa698
JR		 3446 if (preferred > tval)
3447 preferred -= tval;
3448 else
3449 preferred = 0;
85486af0
TG		 3450 if (valid != INFINITY_LIFE_TIME)
3451 valid -= tval;
1da177e4
LT		 3452 }
3453 } else {
85486af0
TG		 3454 preferred = INFINITY_LIFE_TIME;
3455 valid = INFINITY_LIFE_TIME;
3456 }
3457
0ab6803b 3458 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3459 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3460 nlmsg_cancel(skb, nlh);
3461 return -EMSGSIZE;
3462 }
1da177e4 3463
0ab6803b 3464 return nlmsg_end(skb, nlh);
1da177e4
LT		 3465}
3466
3467static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3468 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3469{
1da177e4 3470 struct nlmsghdr *nlh;
101bb229
TG		 3471 u8 scope = RT_SCOPE_UNIVERSE;
3472 int ifindex = ifmca->idev->dev->ifindex;
3473
3474 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3475 scope = RT_SCOPE_SITE;
1da177e4 3476
0ab6803b
TG		 3477 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3478 if (nlh == NULL)
26932566 3479 return -EMSGSIZE;
85486af0 3480
0ab6803b
TG		 3481 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3482 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3483 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3484 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3485 nlmsg_cancel(skb, nlh);
3486 return -EMSGSIZE;
3487 }
85486af0 3488
0ab6803b 3489 return nlmsg_end(skb, nlh);
1da177e4
LT		 3490}
3491
3492static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3493 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3494{
1da177e4 3495 struct nlmsghdr *nlh;
101bb229
TG		 3496 u8 scope = RT_SCOPE_UNIVERSE;
3497 int ifindex = ifaca->aca_idev->dev->ifindex;
3498
3499 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3500 scope = RT_SCOPE_SITE;
1da177e4 3501
0ab6803b
TG		 3502 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3503 if (nlh == NULL)
26932566 3504 return -EMSGSIZE;
85486af0 3505
0ab6803b
TG		 3506 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3507 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3508 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3509 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3510 nlmsg_cancel(skb, nlh);
3511 return -EMSGSIZE;
3512 }
1da177e4 3513
0ab6803b 3514 return nlmsg_end(skb, nlh);
1da177e4
LT		 3515}
3516
3517enum addr_type_t
3518{
3519 UNICAST_ADDR,
3520 MULTICAST_ADDR,
3521 ANYCAST_ADDR,
3522};
3523
234b27c3
ED		 3524/* called with rcu_read_lock() */
3525static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3526 struct netlink_callback *cb, enum addr_type_t type,
3527 int s_ip_idx, int *p_ip_idx)
3528{
3529 struct inet6_ifaddr *ifa;
3530 struct ifmcaddr6 *ifmca;
3531 struct ifacaddr6 *ifaca;
3532 int err = 1;
3533 int ip_idx = *p_ip_idx;
3534
3535 read_lock_bh(&idev->lock);
3536 switch (type) {
3537 case UNICAST_ADDR:
3538 /* unicast address incl. temp addr */
3539 for (ifa = idev->addr_list; ifa;
3540 ifa = ifa->if_next, ip_idx++) {
3541 if (ip_idx < s_ip_idx)
3542 continue;
3543 err = inet6_fill_ifaddr(skb, ifa,
3544 NETLINK_CB(cb->skb).pid,
3545 cb->nlh->nlmsg_seq,
3546 RTM_NEWADDR,
3547 NLM_F_MULTI);
3548 if (err <= 0)
3549 break;
3550 }
3551 break;
3552 case MULTICAST_ADDR:
3553 /* multicast address */
3554 for (ifmca = idev->mc_list; ifmca;
3555 ifmca = ifmca->next, ip_idx++) {
3556 if (ip_idx < s_ip_idx)
3557 continue;
3558 err = inet6_fill_ifmcaddr(skb, ifmca,
3559 NETLINK_CB(cb->skb).pid,
3560 cb->nlh->nlmsg_seq,
3561 RTM_GETMULTICAST,
3562 NLM_F_MULTI);
3563 if (err <= 0)
3564 break;
3565 }
3566 break;
3567 case ANYCAST_ADDR:
3568 /* anycast address */
3569 for (ifaca = idev->ac_list; ifaca;
3570 ifaca = ifaca->aca_next, ip_idx++) {
3571 if (ip_idx < s_ip_idx)
3572 continue;
3573 err = inet6_fill_ifacaddr(skb, ifaca,
3574 NETLINK_CB(cb->skb).pid,
3575 cb->nlh->nlmsg_seq,
3576 RTM_GETANYCAST,
3577 NLM_F_MULTI);
3578 if (err <= 0)
3579 break;
3580 }
3581 break;
3582 default:
3583 break;
3584 }
3585 read_unlock_bh(&idev->lock);
3586 *p_ip_idx = ip_idx;
3587 return err;
3588}
3589
1da177e4
LT		 3590static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3591 enum addr_type_t type)
3592{
234b27c3
ED		 3593 struct net *net = sock_net(skb->sk);
3594 int h, s_h;
1da177e4
LT		 3595 int idx, ip_idx;
3596 int s_idx, s_ip_idx;
1da177e4 3597 struct net_device *dev;
234b27c3
ED		 3598 struct inet6_dev *idev;
3599 struct hlist_head *head;
3600 struct hlist_node *node;
1ab1457c 3601
234b27c3
ED		 3602 s_h = cb->args[0];
3603 s_idx = idx = cb->args[1];
3604 s_ip_idx = ip_idx = cb->args[2];
5d5619b4 3605
234b27c3
ED		 3606 rcu_read_lock();
3607 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3608 idx = 0;
3609 head = &net->dev_index_head[h];
3610 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3611 if (idx < s_idx)
3612 goto cont;
4b97efdf 3613 if (h > s_h || idx > s_idx)
234b27c3
ED		 3614 s_ip_idx = 0;
3615 ip_idx = 0;
3616 if ((idev = __in6_dev_get(dev)) == NULL)
3617 goto cont;
3618
3619 if (in6_dump_addrs(idev, skb, cb, type,
3620 s_ip_idx, &ip_idx) <= 0)
3621 goto done;
7562f876 3622cont:
234b27c3
ED		 3623 idx++;
3624 }
1da177e4 3625 }
234b27c3
ED		 3626done:
3627 rcu_read_unlock();
3628 cb->args[0] = h;
3629 cb->args[1] = idx;
3630 cb->args[2] = ip_idx;
3631
1da177e4
LT		 3632 return skb->len;
3633}
3634
3635static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3636{
3637 enum addr_type_t type = UNICAST_ADDR;
b854272b 3638
1da177e4
LT		 3639 return inet6_dump_addr(skb, cb, type);
3640}
3641
3642static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3643{
3644 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3645
1da177e4
LT		 3646 return inet6_dump_addr(skb, cb, type);
3647}
3648
3649
3650static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3651{
3652 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3653
1da177e4
LT		 3654 return inet6_dump_addr(skb, cb, type);
3655}
3656
1b29fc2c
TG		 3657static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3658 void *arg)
6c223828 3659{
3b1e0a65 3660 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3661 struct ifaddrmsg *ifm;
3662 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3663 struct in6_addr *addr = NULL;
3664 struct net_device *dev = NULL;
3665 struct inet6_ifaddr *ifa;
3666 struct sk_buff *skb;
6c223828
NT		 3667 int err;
3668
1b29fc2c
TG		 3669 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3670 if (err < 0)
3671 goto errout;
3672
3673 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3674 if (addr == NULL) {
3675 err = -EINVAL;
3676 goto errout;
6c223828 3677 }
6c223828 3678
1b29fc2c 3679 ifm = nlmsg_data(nlh);
6c223828 3680 if (ifm->ifa_index)
6fda7350 3681 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3682
1cab3da6 3683 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3684 err = -EADDRNOTAVAIL;
3685 goto errout;
3686 }
6c223828 3687
0ab6803b 3688 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3689 err = -ENOBUFS;
1b29fc2c 3690 goto errout_ifa;
6c223828
NT		 3691 }
3692
6c223828
NT		 3693 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3694 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3695 if (err < 0) {
3696 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3697 WARN_ON(err == -EMSGSIZE);
3698 kfree_skb(skb);
3699 goto errout_ifa;
3700 }
6fda7350 3701 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3702errout_ifa:
6c223828 3703 in6_ifa_put(ifa);
1b29fc2c 3704errout:
6c223828 3705 return err;
6c223828
NT		 3706}
3707
1da177e4
LT		 3708static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3709{
3710 struct sk_buff *skb;
c346dca1 3711 struct net *net = dev_net(ifa->idev->dev);
5d620266 3712 int err = -ENOBUFS;
1da177e4 3713
0ab6803b 3714 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3715 if (skb == NULL)
3716 goto errout;
3717
3718 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3719 if (err < 0) {
3720 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3721 WARN_ON(err == -EMSGSIZE);
3722 kfree_skb(skb);
3723 goto errout;
3724 }
1ce85fe4
PNA		 3725 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3726 return;
5d620266
TG		 3727errout:
3728 if (err < 0)
6fda7350 3729 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3730}
3731
b6f99a21 3732static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3733 __s32 *array, int bytes)
3734{
04561c1f
TG		 3735 BUG_ON(bytes < (DEVCONF_MAX * 4));
3736
1da177e4
LT		 3737 memset(array, 0, bytes);
3738 array[DEVCONF_FORWARDING] = cnf->forwarding;
3739 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3740 array[DEVCONF_MTU6] = cnf->mtu6;
3741 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3742 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3743 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3744 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3745 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3746 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3747 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3748 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3749#ifdef CONFIG_IPV6_PRIVACY
3750 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3751 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3752 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3753 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3754 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3755#endif
3756 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3757 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3758 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3759#ifdef CONFIG_IPV6_ROUTER_PREF
3760 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3761 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3762#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3763 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3764#endif
930d6ff2 3765#endif
fbea49e1 3766 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3767 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3768#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3769 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3770#endif
7bc570c8
YH		 3771#ifdef CONFIG_IPV6_MROUTE
3772 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3773#endif
778d80be 3774 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3775 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
c3faca05 3776 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
1da177e4
LT		 3777}
3778
339bf98f
TG		 3779static inline size_t inet6_if_nlmsg_size(void)
3780{
3781 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3782 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3783 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3784 + nla_total_size(4) /* IFLA_MTU */
3785 + nla_total_size(4) /* IFLA_LINK */
3786 + nla_total_size( /* IFLA_PROTINFO */
3787 nla_total_size(4) /* IFLA_INET6_FLAGS */
3788 + nla_total_size(sizeof(struct ifla_cacheinfo))
3789 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3790 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3791 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3792 );
3793}
c5396a31 3794
7d720c3e
TH		 3795static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
3796 int items, int bytes)
7f7d9a6b
HX		 3797{
3798 int i;
3799 int pad = bytes - sizeof(u64) * items;
3800 BUG_ON(pad < 0);
3801
3802 /* Use put_unaligned() because stats may not be aligned for u64. */
3803 put_unaligned(items, &stats[0]);
3804 for (i = 1; i < items; i++)
3805 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3806
3807 memset(&stats[items], 0, pad);
3808}
3809
3810static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3811 int bytes)
3812{
3813 switch(attrtype) {
3814 case IFLA_INET6_STATS:
7d720c3e 3815 __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
7f7d9a6b
HX		 3816 break;
3817 case IFLA_INET6_ICMP6STATS:
7d720c3e 3818 __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
7f7d9a6b
HX		 3819 break;
3820 }
3821}
3822
1ab1457c 3823static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3824 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3825{
04561c1f 3826 struct net_device *dev = idev->dev;
bf99f1bd 3827 struct nlattr *nla;
04561c1f
TG		 3828 struct ifinfomsg *hdr;
3829 struct nlmsghdr *nlh;
3830 void *protoinfo;
3831 struct ifla_cacheinfo ci;
3832
3833 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3834 if (nlh == NULL)
26932566 3835 return -EMSGSIZE;
04561c1f
TG		 3836
3837 hdr = nlmsg_data(nlh);
3838 hdr->ifi_family = AF_INET6;
3839 hdr->__ifi_pad = 0;
3840 hdr->ifi_type = dev->type;
3841 hdr->ifi_index = dev->ifindex;
3842 hdr->ifi_flags = dev_get_flags(dev);
3843 hdr->ifi_change = 0;
3844
3845 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3846
3847 if (dev->addr_len)
04561c1f 3848 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3849
04561c1f 3850 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3851 if (dev->ifindex != dev->iflink)
04561c1f 3852 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3853
04561c1f
TG		 3854 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3855 if (protoinfo == NULL)
3856 goto nla_put_failure;
1da177e4 3857
04561c1f 3858 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3859
1da177e4
LT		 3860 ci.max_reasm_len = IPV6_MAXPLEN;
3861 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3862 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3863 ci.reachable_time = idev->nd_parms->reachable_time;
3864 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3865 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3866
bf99f1bd
YH		 3867 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3868 if (nla == NULL)
04561c1f 3869 goto nla_put_failure;
bf99f1bd 3870 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3871
bf99f1bd
YH		 3872 /* XXX - MC not implemented */
3873
3874 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3875 if (nla == NULL)
3876 goto nla_put_failure;
3877 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3878
3879 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3880 if (nla == NULL)
3881 goto nla_put_failure;
3882 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3883
04561c1f
TG		 3884 nla_nest_end(skb, protoinfo);
3885 return nlmsg_end(skb, nlh);
1da177e4 3886
04561c1f 3887nla_put_failure:
26932566
PM		 3888 nlmsg_cancel(skb, nlh);
3889 return -EMSGSIZE;
1da177e4
LT		 3890}
3891
3892static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3893{
3b1e0a65 3894 struct net *net = sock_net(skb->sk);
84d2697d 3895 int h, s_h;
434a8a58 3896 int idx = 0, s_idx;
1da177e4
LT		 3897 struct net_device *dev;
3898 struct inet6_dev *idev;
84d2697d
ED		 3899 struct hlist_head *head;
3900 struct hlist_node *node;
1da177e4 3901
84d2697d
ED		 3902 s_h = cb->args[0];
3903 s_idx = cb->args[1];
3904
3905 rcu_read_lock();
3906 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3907 idx = 0;
3908 head = &net->dev_index_head[h];
3909 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3910 if (idx < s_idx)
3911 goto cont;
3912 idev = __in6_dev_get(dev);
3913 if (!idev)
3914 goto cont;
3915 if (inet6_fill_ifinfo(skb, idev,
3916 NETLINK_CB(cb->skb).pid,
3917 cb->nlh->nlmsg_seq,
3918 RTM_NEWLINK, NLM_F_MULTI) <= 0)
3919 goto out;
7562f876 3920cont:
84d2697d
ED		 3921 idx++;
3922 }
1da177e4 3923 }
84d2697d
ED		 3924out:
3925 rcu_read_unlock();
3926 cb->args[1] = idx;
3927 cb->args[0] = h;
1da177e4
LT		 3928
3929 return skb->len;
3930}
3931
3932void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3933{
3934 struct sk_buff *skb;
c346dca1 3935 struct net *net = dev_net(idev->dev);
8d7a76c9 3936 int err = -ENOBUFS;
1ab1457c 3937
339bf98f 3938 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3939 if (skb == NULL)
3940 goto errout;
3941
3942 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3943 if (err < 0) {
3944 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3945 WARN_ON(err == -EMSGSIZE);
3946 kfree_skb(skb);
3947 goto errout;
3948 }
1ce85fe4
PNA		 3949 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3950 return;
8d7a76c9
TG		 3951errout:
3952 if (err < 0)
6fda7350 3953 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3954}
3955
339bf98f
TG		 3956static inline size_t inet6_prefix_nlmsg_size(void)
3957{
3958 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3959 + nla_total_size(sizeof(struct in6_addr))
3960 + nla_total_size(sizeof(struct prefix_cacheinfo));
3961}
c5396a31 3962
1da177e4 3963static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3964 struct prefix_info *pinfo, u32 pid, u32 seq,
3965 int event, unsigned int flags)
1da177e4 3966{
6051e2f4
TG		 3967 struct prefixmsg *pmsg;
3968 struct nlmsghdr *nlh;
1da177e4
LT		 3969 struct prefix_cacheinfo ci;
3970
6051e2f4
TG		 3971 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3972 if (nlh == NULL)
26932566 3973 return -EMSGSIZE;
6051e2f4
TG		 3974
3975 pmsg = nlmsg_data(nlh);
1da177e4 3976 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3977 pmsg->prefix_pad1 = 0;
3978 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3979 pmsg->prefix_ifindex = idev->dev->ifindex;
3980 pmsg->prefix_len = pinfo->prefix_len;
3981 pmsg->prefix_type = pinfo->type;
8a47077a 3982 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3983 pmsg->prefix_flags = 0;
3984 if (pinfo->onlink)
3985 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3986 if (pinfo->autoconf)
3987 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3988
6051e2f4 3989 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3990
3991 ci.preferred_time = ntohl(pinfo->prefered);
3992 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3993 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3994
6051e2f4 3995 return nlmsg_end(skb, nlh);
1da177e4 3996
6051e2f4 3997nla_put_failure:
26932566
PM		 3998 nlmsg_cancel(skb, nlh);
3999 return -EMSGSIZE;
1da177e4
LT		 4000}
4001
1ab1457c 4002static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 4003 struct prefix_info *pinfo)
4004{
4005 struct sk_buff *skb;
c346dca1 4006 struct net *net = dev_net(idev->dev);
8c384bfa 4007 int err = -ENOBUFS;
1da177e4 4008
339bf98f 4009 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 4010 if (skb == NULL)
4011 goto errout;
4012
4013 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 4014 if (err < 0) {
4015 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4016 WARN_ON(err == -EMSGSIZE);
4017 kfree_skb(skb);
4018 goto errout;
4019 }
1ce85fe4
PNA		 4020 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4021 return;
8c384bfa
TG		 4022errout:
4023 if (err < 0)
6fda7350 4024 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 4025}
4026
1da177e4
LT		 4027static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4028{
4029 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4030
4031 switch (event) {
4032 case RTM_NEWADDR:
95c385b4
NH		 4033 /*
4034 * If the address was optimistic
4035 * we inserted the route at the start of
4036 * our DAD process, so we don't need
4037 * to do it again
4038 */
4039 if (!(ifp->rt->rt6i_node))
4040 ip6_ins_rt(ifp->rt);
1da177e4
LT		 4041 if (ifp->idev->cnf.forwarding)
4042 addrconf_join_anycast(ifp);
4043 break;
4044 case RTM_DELADDR:
4045 if (ifp->idev->cnf.forwarding)
4046 addrconf_leave_anycast(ifp);
4047 addrconf_leave_solict(ifp->idev, &ifp->addr);
4048 dst_hold(&ifp->rt->u.dst);
e0a1ad73 4049 if (ip6_del_rt(ifp->rt))
1da177e4 4050 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 4051 break;
4052 }
4053}
4054
4055static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4056{
8814c4b5 4057 rcu_read_lock_bh();
1da177e4
LT		 4058 if (likely(ifp->idev->dead == 0))
4059 __ipv6_ifa_notify(event, ifp);
8814c4b5 4060 rcu_read_unlock_bh();
1da177e4
LT		 4061}
4062
4063#ifdef CONFIG_SYSCTL
4064
4065static
8d65af78 4066int addrconf_sysctl_forward(ctl_table *ctl, int write,
1da177e4
LT		 4067 void __user *buffer, size_t *lenp, loff_t *ppos)
4068{
4069 int *valp = ctl->data;
4070 int val = *valp;
88af182e 4071 loff_t pos = *ppos;
1da177e4
LT		 4072 int ret;
4073
8d65af78 4074 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 4075
c8fecf22 4076 if (write)
b325fddb 4077 ret = addrconf_fixup_forwarding(ctl, valp, val);
88af182e
EB		 4078 if (ret)
4079 *ppos = pos;
1ab1457c 4080 return ret;
1da177e4
LT		 4081}
4082
56d417b1
BH		 4083static void dev_disable_change(struct inet6_dev *idev)
4084{
4085 if (!idev || !idev->dev)
4086 return;
4087
4088 if (idev->cnf.disable_ipv6)
4089 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4090 else
4091 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4092}
4093
4094static void addrconf_disable_change(struct net *net, __s32 newf)
4095{
4096 struct net_device *dev;
4097 struct inet6_dev *idev;
4098
c6d14c84
ED		 4099 rcu_read_lock();
4100 for_each_netdev_rcu(net, dev) {
56d417b1
BH		 4101 idev = __in6_dev_get(dev);
4102 if (idev) {
4103 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4104 idev->cnf.disable_ipv6 = newf;
4105 if (changed)
4106 dev_disable_change(idev);
4107 }
56d417b1 4108 }
c6d14c84 4109 rcu_read_unlock();
56d417b1
BH		 4110}
4111
4112static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
4113{
4114 struct net *net;
4115
4116 net = (struct net *)table->extra2;
4117
4118 if (p == &net->ipv6.devconf_dflt->disable_ipv6)
4119 return 0;
4120
88af182e
EB		 4121 if (!rtnl_trylock()) {
4122 /* Restore the original values before restarting */
4123 *p = old;
56d417b1 4124 return restart_syscall();
88af182e 4125 }
56d417b1
BH		 4126
4127 if (p == &net->ipv6.devconf_all->disable_ipv6) {
4128 __s32 newf = net->ipv6.devconf_all->disable_ipv6;
4129 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4130 addrconf_disable_change(net, newf);
4131 } else if ((!*p) ^ (!old))
4132 dev_disable_change((struct inet6_dev *)table->extra1);
4133
4134 rtnl_unlock();
4135 return 0;
4136}
4137
4138static
8d65af78 4139int addrconf_sysctl_disable(ctl_table *ctl, int write,
56d417b1
BH		 4140 void __user *buffer, size_t *lenp, loff_t *ppos)
4141{
4142 int *valp = ctl->data;
4143 int val = *valp;
88af182e 4144 loff_t pos = *ppos;
56d417b1
BH		 4145 int ret;
4146
8d65af78 4147 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
56d417b1
BH		 4148
4149 if (write)
4150 ret = addrconf_disable_ipv6(ctl, valp, val);
88af182e
EB		 4151 if (ret)
4152 *ppos = pos;
56d417b1
BH		 4153 return ret;
4154}
4155
1da177e4
LT		 4156static struct addrconf_sysctl_table
4157{
4158 struct ctl_table_header *sysctl_header;
f6a07b29 4159 ctl_table addrconf_vars[DEVCONF_MAX+1];
1dab6222 4160 char *dev_name;
ab32ea5d 4161} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4162 .sysctl_header = NULL,
4163 .addrconf_vars = {
1ab1457c 4164 {
1da177e4 4165 .procname = "forwarding",
1ab1457c 4166 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 4167 .maxlen = sizeof(int),
4168 .mode = 0644,
6d9f239a 4169 .proc_handler = addrconf_sysctl_forward,
1da177e4
LT		 4170 },
4171 {
1da177e4 4172 .procname = "hop_limit",
1ab1457c 4173 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 4174 .maxlen = sizeof(int),
4175 .mode = 0644,
4176 .proc_handler = proc_dointvec,
4177 },
4178 {
1da177e4
LT		 4179 .procname = "mtu",
4180 .data = &ipv6_devconf.mtu6,
1ab1457c 4181 .maxlen = sizeof(int),
1da177e4 4182 .mode = 0644,
6d9f239a 4183 .proc_handler = proc_dointvec,
1da177e4
LT		 4184 },
4185 {
1da177e4 4186 .procname = "accept_ra",
1ab1457c 4187 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 4188 .maxlen = sizeof(int),
4189 .mode = 0644,
6d9f239a 4190 .proc_handler = proc_dointvec,
1da177e4
LT		 4191 },
4192 {
1da177e4 4193 .procname = "accept_redirects",
1ab1457c 4194 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 4195 .maxlen = sizeof(int),
4196 .mode = 0644,
6d9f239a 4197 .proc_handler = proc_dointvec,
1da177e4
LT		 4198 },
4199 {
1da177e4 4200 .procname = "autoconf",
1ab1457c 4201 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 4202 .maxlen = sizeof(int),
4203 .mode = 0644,
6d9f239a 4204 .proc_handler = proc_dointvec,
1da177e4
LT		 4205 },
4206 {
1da177e4 4207 .procname = "dad_transmits",
1ab1457c 4208 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 4209 .maxlen = sizeof(int),
4210 .mode = 0644,
6d9f239a 4211 .proc_handler = proc_dointvec,
1da177e4
LT		 4212 },
4213 {
1da177e4 4214 .procname = "router_solicitations",
1ab1457c 4215 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 4216 .maxlen = sizeof(int),
4217 .mode = 0644,
6d9f239a 4218 .proc_handler = proc_dointvec,
1da177e4
LT		 4219 },
4220 {
1da177e4 4221 .procname = "router_solicitation_interval",
1ab1457c 4222 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 4223 .maxlen = sizeof(int),
4224 .mode = 0644,
6d9f239a 4225 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4226 },
4227 {
1da177e4 4228 .procname = "router_solicitation_delay",
1ab1457c 4229 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 4230 .maxlen = sizeof(int),
4231 .mode = 0644,
6d9f239a 4232 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4233 },
4234 {
1da177e4 4235 .procname = "force_mld_version",
1ab1457c 4236 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 4237 .maxlen = sizeof(int),
4238 .mode = 0644,
6d9f239a 4239 .proc_handler = proc_dointvec,
1da177e4
LT		 4240 },
4241#ifdef CONFIG_IPV6_PRIVACY
4242 {
1da177e4 4243 .procname = "use_tempaddr",
1ab1457c 4244 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 4245 .maxlen = sizeof(int),
4246 .mode = 0644,
6d9f239a 4247 .proc_handler = proc_dointvec,
1da177e4
LT		 4248 },
4249 {
1da177e4 4250 .procname = "temp_valid_lft",
1ab1457c 4251 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 4252 .maxlen = sizeof(int),
4253 .mode = 0644,
6d9f239a 4254 .proc_handler = proc_dointvec,
1da177e4
LT		 4255 },
4256 {
1da177e4 4257 .procname = "temp_prefered_lft",
1ab1457c 4258 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 4259 .maxlen = sizeof(int),
4260 .mode = 0644,
6d9f239a 4261 .proc_handler = proc_dointvec,
1da177e4
LT		 4262 },
4263 {
1da177e4 4264 .procname = "regen_max_retry",
1ab1457c 4265 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 4266 .maxlen = sizeof(int),
4267 .mode = 0644,
6d9f239a 4268 .proc_handler = proc_dointvec,
1da177e4
LT		 4269 },
4270 {
1da177e4 4271 .procname = "max_desync_factor",
1ab1457c 4272 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 4273 .maxlen = sizeof(int),
4274 .mode = 0644,
6d9f239a 4275 .proc_handler = proc_dointvec,
1da177e4
LT		 4276 },
4277#endif
4278 {
1da177e4
LT		 4279 .procname = "max_addresses",
4280 .data = &ipv6_devconf.max_addresses,
4281 .maxlen = sizeof(int),
4282 .mode = 0644,
6d9f239a 4283 .proc_handler = proc_dointvec,
1da177e4 4284 },
65f5c7c1 4285 {
65f5c7c1 4286 .procname = "accept_ra_defrtr",
1ab1457c 4287 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4288 .maxlen = sizeof(int),
4289 .mode = 0644,
6d9f239a 4290 .proc_handler = proc_dointvec,
65f5c7c1 4291 },
c4fd30eb 4292 {
c4fd30eb 4293 .procname = "accept_ra_pinfo",
1ab1457c 4294 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4295 .maxlen = sizeof(int),
4296 .mode = 0644,
6d9f239a 4297 .proc_handler = proc_dointvec,
c4fd30eb 4298 },
930d6ff2
YH		 4299#ifdef CONFIG_IPV6_ROUTER_PREF
4300 {
930d6ff2
YH		 4301 .procname = "accept_ra_rtr_pref",
4302 .data = &ipv6_devconf.accept_ra_rtr_pref,
4303 .maxlen = sizeof(int),
4304 .mode = 0644,
6d9f239a 4305 .proc_handler = proc_dointvec,
930d6ff2 4306 },
52e16356 4307 {
52e16356
YH		 4308 .procname = "router_probe_interval",
4309 .data = &ipv6_devconf.rtr_probe_interval,
4310 .maxlen = sizeof(int),
4311 .mode = 0644,
6d9f239a 4312 .proc_handler = proc_dointvec_jiffies,
52e16356 4313 },
fa03ef38 4314#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4 4315 {
09c884d4
YH		 4316 .procname = "accept_ra_rt_info_max_plen",
4317 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4318 .maxlen = sizeof(int),
4319 .mode = 0644,
6d9f239a 4320 .proc_handler = proc_dointvec,
09c884d4
YH		 4321 },
4322#endif
930d6ff2 4323#endif
fbea49e1 4324 {
fbea49e1
YH		 4325 .procname = "proxy_ndp",
4326 .data = &ipv6_devconf.proxy_ndp,
4327 .maxlen = sizeof(int),
4328 .mode = 0644,
6d9f239a 4329 .proc_handler = proc_dointvec,
fbea49e1 4330 },
0bcbc926 4331 {
0bcbc926
YH		 4332 .procname = "accept_source_route",
4333 .data = &ipv6_devconf.accept_source_route,
4334 .maxlen = sizeof(int),
4335 .mode = 0644,
6d9f239a 4336 .proc_handler = proc_dointvec,
0bcbc926 4337 },
95c385b4
NH		 4338#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4339 {
95c385b4
NH		 4340 .procname = "optimistic_dad",
4341 .data = &ipv6_devconf.optimistic_dad,
4342 .maxlen = sizeof(int),
4343 .mode = 0644,
6d9f239a 4344 .proc_handler = proc_dointvec,
95c385b4
NH		 4345
4346 },
7bc570c8
YH		 4347#endif
4348#ifdef CONFIG_IPV6_MROUTE
4349 {
7bc570c8
YH		 4350 .procname = "mc_forwarding",
4351 .data = &ipv6_devconf.mc_forwarding,
4352 .maxlen = sizeof(int),
a4e6db07 4353 .mode = 0444,
6d9f239a 4354 .proc_handler = proc_dointvec,
7bc570c8 4355 },
95c385b4 4356#endif
778d80be 4357 {
778d80be
YH		 4358 .procname = "disable_ipv6",
4359 .data = &ipv6_devconf.disable_ipv6,
4360 .maxlen = sizeof(int),
4361 .mode = 0644,
56d417b1 4362 .proc_handler = addrconf_sysctl_disable,
778d80be 4363 },
1b34be74 4364 {
1b34be74
YH		 4365 .procname = "accept_dad",
4366 .data = &ipv6_devconf.accept_dad,
4367 .maxlen = sizeof(int),
4368 .mode = 0644,
6d9f239a 4369 .proc_handler = proc_dointvec,
1b34be74 4370 },
f7734fdf 4371 {
f7734fdf
OP		 4372 .procname = "force_tllao",
4373 .data = &ipv6_devconf.force_tllao,
4374 .maxlen = sizeof(int),
4375 .mode = 0644,
4376 .proc_handler = proc_dointvec
4377 },
1da177e4 4378 {
f8572d8f 4379 /* sentinel */
1da177e4
LT		 4380 }
4381 },
1da177e4
LT		 4382};
4383
bff16c2f 4384static int __addrconf_sysctl_register(struct net *net, char *dev_name,
f8572d8f 4385 struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4386{
4387 int i;
1da177e4 4388 struct addrconf_sysctl_table *t;
1da177e4 4389
1dab6222
PE		 4390#define ADDRCONF_CTL_PATH_DEV 3
4391
4392 struct ctl_path addrconf_ctl_path[] = {
f8572d8f
EB		 4393 { .procname = "net", },
4394 { .procname = "ipv6", },
4395 { .procname = "conf", },
1dab6222
PE		 4396 { /* to be set */ },
4397 { },
4398 };
4399
4400
af879cc7 4401 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4402 if (t == NULL)
f68635e6
PE		 4403 goto out;
4404
1da177e4
LT		 4405 for (i=0; t->addrconf_vars[i].data; i++) {
4406 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4407 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4408 t->addrconf_vars[i].extra2 = net;
1da177e4 4409 }
1da177e4 4410
1ab1457c
YH		 4411 /*
4412 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4413 * by sysctl and we wouldn't want anyone to change it under our feet
4414 * (see SIOCSIFNAME).
1ab1457c 4415 */
1dab6222
PE		 4416 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4417 if (!t->dev_name)
f68635e6 4418 goto free;
1da177e4 4419
1dab6222 4420 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
1da177e4 4421
bff16c2f 4422 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4423 t->addrconf_vars);
1da177e4
LT		 4424 if (t->sysctl_header == NULL)
4425 goto free_procname;
f68635e6
PE		 4426
4427 p->sysctl = t;
95897312 4428 return 0;
1da177e4 4429
f68635e6 4430free_procname:
1dab6222 4431 kfree(t->dev_name);
f68635e6 4432free:
1da177e4 4433 kfree(t);
f68635e6 4434out:
95897312 4435 return -ENOBUFS;
1da177e4
LT		 4436}
4437
408c4768
PE		 4438static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4439{
4440 struct addrconf_sysctl_table *t;
4441
4442 if (p->sysctl == NULL)
4443 return;
4444
4445 t = p->sysctl;
4446 p->sysctl = NULL;
4447 unregister_sysctl_table(t->sysctl_header);
4448 kfree(t->dev_name);
4449 kfree(t);
4450}
4451
f52295a9
PE		 4452static void addrconf_sysctl_register(struct inet6_dev *idev)
4453{
54716e3b 4454 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
f8572d8f 4455 &ndisc_ifinfo_sysctl_change);
c346dca1 4456 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
f8572d8f 4457 idev, &idev->cnf);
f52295a9
PE		 4458}
4459
408c4768 4460static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4461{
408c4768
PE		 4462 __addrconf_sysctl_unregister(&idev->cnf);
4463 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4464}
4465
4466
4467#endif
4468
2c8c1e72 4469static int __net_init addrconf_init_net(struct net *net)
e0da5a48
PE		 4470{
4471 int err;
4472 struct ipv6_devconf *all, *dflt;
4473
4474 err = -ENOMEM;
4475 all = &ipv6_devconf;
4476 dflt = &ipv6_devconf_dflt;
4477
09ad9bc7 4478 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4479 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4480 if (all == NULL)
4481 goto err_alloc_all;
4482
4483 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4484 if (dflt == NULL)
4485 goto err_alloc_dflt;
56d417b1
BH		 4486 } else {
4487 /* these will be inherited by all namespaces */
4488 dflt->autoconf = ipv6_defaults.autoconf;
4489 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
e0da5a48
PE		 4490 }
4491
4492 net->ipv6.devconf_all = all;
4493 net->ipv6.devconf_dflt = dflt;
4494
4495#ifdef CONFIG_SYSCTL
f8572d8f 4496 err = __addrconf_sysctl_register(net, "all", NULL, all);
e0da5a48
PE		 4497 if (err < 0)
4498 goto err_reg_all;
4499
f8572d8f 4500 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
e0da5a48
PE		 4501 if (err < 0)
4502 goto err_reg_dflt;
4503#endif
4504 return 0;
4505
4506#ifdef CONFIG_SYSCTL
4507err_reg_dflt:
4508 __addrconf_sysctl_unregister(all);
4509err_reg_all:
4510 kfree(dflt);
4511#endif
4512err_alloc_dflt:
4513 kfree(all);
4514err_alloc_all:
4515 return err;
4516}
4517
2c8c1e72 4518static void __net_exit addrconf_exit_net(struct net *net)
e0da5a48
PE		 4519{
4520#ifdef CONFIG_SYSCTL
4521 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4522 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4523#endif
09ad9bc7 4524 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4525 kfree(net->ipv6.devconf_dflt);
4526 kfree(net->ipv6.devconf_all);
4527 }
4528}
4529
4530static struct pernet_operations addrconf_ops = {
4531 .init = addrconf_init_net,
4532 .exit = addrconf_exit_net,
4533};
4534
1da177e4
LT		 4535/*
4536 * Device notifier
4537 */
4538
4539int register_inet6addr_notifier(struct notifier_block *nb)
4540{
1ab1457c 4541 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4542}
4543
7159039a
YH		 4544EXPORT_SYMBOL(register_inet6addr_notifier);
4545
1da177e4
LT		 4546int unregister_inet6addr_notifier(struct notifier_block *nb)
4547{
1ab1457c 4548 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4549}
4550
7159039a
YH		 4551EXPORT_SYMBOL(unregister_inet6addr_notifier);
4552
1da177e4
LT		 4553/*
4554 * Init / cleanup code
4555 */
4556
4557int __init addrconf_init(void)
4558{
2a8cc6c8
YH		 4559 int err;
4560
4561 if ((err = ipv6_addr_label_init()) < 0) {
4562 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4563 err);
4564 return err;
4565 }
1da177e4 4566
e0da5a48
PE		 4567 register_pernet_subsys(&addrconf_ops);
4568
1da177e4
LT		 4569 /* The addrconf netdev notifier requires that loopback_dev
4570 * has it's ipv6 private information allocated and setup
4571 * before it can bring up and give link-local addresses
4572 * to other devices which are up.
4573 *
4574 * Unfortunately, loopback_dev is not necessarily the first
4575 * entry in the global dev_base list of net devices. In fact,
4576 * it is likely to be the very last entry on that list.
4577 * So this causes the notifier registry below to try and
4578 * give link-local addresses to all devices besides loopback_dev
4579 * first, then loopback_dev, which cases all the non-loopback_dev
4580 * devices to fail to get a link-local address.
4581 *
4582 * So, as a temporary fix, allocate the ipv6 structure for
4583 * loopback_dev first by hand.
4584 * Longer term, all of the dependencies ipv6 has upon the loopback
4585 * device and it being up should be removed.
4586 */
4587 rtnl_lock();
2774c7ab 4588 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4589 err = -ENOMEM;
4590 rtnl_unlock();
4591 if (err)
e0da5a48 4592 goto errlo;
1da177e4
LT		 4593
4594 register_netdevice_notifier(&ipv6_dev_notf);
4595
1da177e4 4596 addrconf_verify(0);
c127ea2c
TG		 4597
4598 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4599 if (err < 0)
4600 goto errout;
4601
4602 /* Only the first call to __rtnl_register can fail */
4603 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4604 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4605 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4606 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4607 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4608
2a8cc6c8
YH		 4609 ipv6_addr_label_rtnl_register();
4610
1da177e4 4611 return 0;
c127ea2c
TG		 4612errout:
4613 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4614errlo:
4615 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4616
4617 return err;
1da177e4
LT		 4618}
4619
09f7709f 4620void addrconf_cleanup(void)
1da177e4 4621{
1ab1457c 4622 struct inet6_ifaddr *ifa;
176c39af 4623 struct net_device *dev;
1da177e4
LT		 4624 int i;
4625
4626 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48 4627 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4628
4629 rtnl_lock();
4630
176c39af
DL		 4631 /* clean dev list */
4632 for_each_netdev(&init_net, dev) {
4633 if (__in6_dev_get(dev) == NULL)
4634 continue;
4635 addrconf_ifdown(dev, 1);
4636 }
4637 addrconf_ifdown(init_net.loopback_dev, 2);
4638
1da177e4
LT		 4639 /*
4640 * Check hash table.
4641 */
1da177e4
LT		 4642 write_lock_bh(&addrconf_hash_lock);
4643 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4644 for (ifa=inet6_addr_lst[i]; ifa; ) {
4645 struct inet6_ifaddr *bifa;
4646
4647 bifa = ifa;
4648 ifa = ifa->lst_next;
4649 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4650 /* Do not free it; something is wrong.
4651 Now we can investigate it with debugger.
4652 */
4653 }
4654 }
4655 write_unlock_bh(&addrconf_hash_lock);
4656
4657 del_timer(&addr_chk_timer);
1da177e4 4658 rtnl_unlock();
1da177e4 4659}
kernel source for telekom puls (alcatel/mediatek)