projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: Add net_ratelimited_function and net_<level>_ratelimited macros
[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>
5a0e3ad6 56#include <linux/slab.h>
1da177e4
LT		 57#ifdef CONFIG_SYSCTL
58#include <linux/sysctl.h>
59#endif
4fc268d2 60#include <linux/capability.h>
1da177e4
LT		 61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4 64
457c4cbc 65#include <net/net_namespace.h>
1da177e4
LT		 66#include <net/sock.h>
67#include <net/snmp.h>
68
06a4c1c5 69#include <net/af_ieee802154.h>
1da177e4
LT		 70#include <net/ipv6.h>
71#include <net/protocol.h>
72#include <net/ndisc.h>
73#include <net/ip6_route.h>
74#include <net/addrconf.h>
75#include <net/tcp.h>
76#include <net/ip.h>
5d620266 77#include <net/netlink.h>
f24e3d65 78#include <net/pkt_sched.h>
1da177e4
LT		 79#include <linux/if_tunnel.h>
80#include <linux/rtnetlink.h>
81
82#ifdef CONFIG_IPV6_PRIVACY
83#include <linux/random.h>
1da177e4
LT		 84#endif
85
e21e8467 86#include <linux/uaccess.h>
7f7d9a6b 87#include <asm/unaligned.h>
1da177e4
LT		 88
89#include <linux/proc_fs.h>
90#include <linux/seq_file.h>
bc3b2d7f 91#include <linux/export.h>
1da177e4
LT		 92
93/* Set to 3 to get tracing... */
94#define ACONF_DEBUG 2
95
96#if ACONF_DEBUG >= 3
97#define ADBG(x) printk x
98#else
99#define ADBG(x)
100#endif
101
102#define INFINITY_LIFE_TIME 0xFFFFFFFF
18a31e1e
TG		 103
104static inline u32 cstamp_delta(unsigned long cstamp)
105{
106 return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
107}
1da177e4 108
b2db7564
YH		 109#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
110#define ADDRCONF_TIMER_FUZZ (HZ / 4)
111#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
112
1da177e4 113#ifdef CONFIG_SYSCTL
f52295a9 114static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 115static void addrconf_sysctl_unregister(struct inet6_dev *idev);
116#else
117static inline void addrconf_sysctl_register(struct inet6_dev *idev)
118{
119}
120
121static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
122{
123}
1da177e4
LT		 124#endif
125
126#ifdef CONFIG_IPV6_PRIVACY
127static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 128static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4 129static void ipv6_regen_rndid(unsigned long data);
1da177e4
LT		 130#endif
131
1b34be74 132static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1da177e4
LT		 133static int ipv6_count_addresses(struct inet6_dev *idev);
134
135/*
136 * Configured unicast address hash table
137 */
c2e21293 138static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
5c578aed 139static DEFINE_SPINLOCK(addrconf_hash_lock);
1da177e4 140
1da177e4
LT		 141static void addrconf_verify(unsigned long);
142
8d06afab 143static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 144static DEFINE_SPINLOCK(addrconf_verify_lock);
145
146static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
147static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
148
93d9b7d7
JP		 149static void addrconf_type_change(struct net_device *dev,
150 unsigned long event);
1da177e4
LT		 151static int addrconf_ifdown(struct net_device *dev, int how);
152
cf22f9a2 153static void addrconf_dad_start(struct inet6_ifaddr *ifp);
1da177e4
LT		 154static void addrconf_dad_timer(unsigned long data);
155static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 156static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 157static void addrconf_rs_timer(unsigned long data);
158static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
159static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
160
1ab1457c 161static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 162 struct prefix_info *pinfo);
3e81c6da
DM		 163static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
164 struct net_device *dev);
1da177e4 165
e041c683 166static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 167
888c848e 168static struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 169 .forwarding = 0,
170 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
171 .mtu6 = IPV6_MIN_MTU,
172 .accept_ra = 1,
173 .accept_redirects = 1,
174 .autoconf = 1,
175 .force_mld_version = 0,
176 .dad_transmits = 1,
177 .rtr_solicits = MAX_RTR_SOLICITATIONS,
178 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
179 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
180#ifdef CONFIG_IPV6_PRIVACY
181 .use_tempaddr = 0,
182 .temp_valid_lft = TEMP_VALID_LIFETIME,
183 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
184 .regen_max_retry = REGEN_MAX_RETRY,
185 .max_desync_factor = MAX_DESYNC_FACTOR,
186#endif
187 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 188 .accept_ra_defrtr = 1,
c4fd30eb 189 .accept_ra_pinfo = 1,
930d6ff2
YH		 190#ifdef CONFIG_IPV6_ROUTER_PREF
191 .accept_ra_rtr_pref = 1,
52e16356 192 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 193#ifdef CONFIG_IPV6_ROUTE_INFO
194 .accept_ra_rt_info_max_plen = 0,
195#endif
930d6ff2 196#endif
fbea49e1 197 .proxy_ndp = 0,
0bcbc926 198 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 199 .disable_ipv6 = 0,
1b34be74 200 .accept_dad = 1,
1da177e4
LT		 201};
202
ab32ea5d 203static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 204 .forwarding = 0,
205 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
206 .mtu6 = IPV6_MIN_MTU,
207 .accept_ra = 1,
208 .accept_redirects = 1,
209 .autoconf = 1,
210 .dad_transmits = 1,
211 .rtr_solicits = MAX_RTR_SOLICITATIONS,
212 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
213 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
214#ifdef CONFIG_IPV6_PRIVACY
215 .use_tempaddr = 0,
216 .temp_valid_lft = TEMP_VALID_LIFETIME,
217 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
218 .regen_max_retry = REGEN_MAX_RETRY,
219 .max_desync_factor = MAX_DESYNC_FACTOR,
220#endif
221 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 222 .accept_ra_defrtr = 1,
c4fd30eb 223 .accept_ra_pinfo = 1,
930d6ff2
YH		 224#ifdef CONFIG_IPV6_ROUTER_PREF
225 .accept_ra_rtr_pref = 1,
52e16356 226 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 227#ifdef CONFIG_IPV6_ROUTE_INFO
228 .accept_ra_rt_info_max_plen = 0,
229#endif
930d6ff2 230#endif
fbea49e1 231 .proxy_ndp = 0,
0bcbc926 232 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 233 .disable_ipv6 = 0,
1b34be74 234 .accept_dad = 1,
1da177e4
LT		 235};
236
237/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 238const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4 239const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
f3ee4010
YH		 240const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
241const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
1da177e4 242
f24e3d65 243/* Check if a valid qdisc is available */
05297949 244static inline bool addrconf_qdisc_ok(const struct net_device *dev)
f24e3d65 245{
05297949 246 return !qdisc_tx_is_noop(dev);
f24e3d65
MC		 247}
248
2b5ead46
YH		 249/* Check if a route is valid prefix route */
250static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
251{
a02cec21 252 return (rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0;
2b5ead46
YH		 253}
254
1da177e4
LT		 255static void addrconf_del_timer(struct inet6_ifaddr *ifp)
256{
257 if (del_timer(&ifp->timer))
258 __in6_ifa_put(ifp);
259}
260
e21e8467 261enum addrconf_timer_t {
1da177e4
LT		 262 AC_NONE,
263 AC_DAD,
264 AC_RS,
265};
266
267static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
268 enum addrconf_timer_t what,
269 unsigned long when)
270{
271 if (!del_timer(&ifp->timer))
272 in6_ifa_hold(ifp);
273
274 switch (what) {
275 case AC_DAD:
276 ifp->timer.function = addrconf_dad_timer;
277 break;
278 case AC_RS:
279 ifp->timer.function = addrconf_rs_timer;
280 break;
e21e8467
SH		 281 default:
282 break;
1da177e4
LT		 283 }
284 ifp->timer.expires = jiffies + when;
285 add_timer(&ifp->timer);
286}
287
7f7d9a6b
HX		 288static int snmp6_alloc_dev(struct inet6_dev *idev)
289{
7d720c3e 290 if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
1823e4c8
ED		 291 sizeof(struct ipstats_mib),
292 __alignof__(struct ipstats_mib)) < 0)
7f7d9a6b 293 goto err_ip;
be281e55
ED		 294 idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
295 GFP_KERNEL);
296 if (!idev->stats.icmpv6dev)
7f7d9a6b 297 goto err_icmp;
be281e55
ED		 298 idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
299 GFP_KERNEL);
300 if (!idev->stats.icmpv6msgdev)
14878f75 301 goto err_icmpmsg;
7f7d9a6b
HX		 302
303 return 0;
304
14878f75 305err_icmpmsg:
be281e55 306 kfree(idev->stats.icmpv6dev);
7f7d9a6b 307err_icmp:
7d720c3e 308 snmp_mib_free((void __percpu **)idev->stats.ipv6);
7f7d9a6b 309err_ip:
aaf70ec7 310 return -ENOMEM;
7f7d9a6b
HX		 311}
312
16910b98 313static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 314{
be281e55
ED		 315 kfree(idev->stats.icmpv6msgdev);
316 kfree(idev->stats.icmpv6dev);
7d720c3e 317 snmp_mib_free((void __percpu **)idev->stats.ipv6);
7f7d9a6b
HX		 318}
319
1da177e4
LT		 320/* Nobody refers to this device, we may destroy it. */
321
322void in6_dev_finish_destroy(struct inet6_dev *idev)
323{
324 struct net_device *dev = idev->dev;
547b792c 325
502a2ffd 326 WARN_ON(!list_empty(&idev->addr_list));
547b792c
IJ		 327 WARN_ON(idev->mc_list != NULL);
328
1da177e4
LT		 329#ifdef NET_REFCNT_DEBUG
330 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
331#endif
332 dev_put(dev);
333 if (!idev->dead) {
e21e8467 334 pr_warning("Freeing alive inet6 device %p\n", idev);
1da177e4
LT		 335 return;
336 }
337 snmp6_free_dev(idev);
38f57d1a 338 kfree_rcu(idev, rcu);
1da177e4 339}
7159039a
YH		 340EXPORT_SYMBOL(in6_dev_finish_destroy);
341
8e5e8f30 342static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
1da177e4
LT		 343{
344 struct inet6_dev *ndev;
345
346 ASSERT_RTNL();
347
348 if (dev->mtu < IPV6_MIN_MTU)
349 return NULL;
350
1ab1457c 351 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 352
1ab1457c
YH		 353 if (ndev == NULL)
354 return NULL;
322f74a4
IO		 355
356 rwlock_init(&ndev->lock);
357 ndev->dev = dev;
502a2ffd 358 INIT_LIST_HEAD(&ndev->addr_list);
359
c346dca1 360 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 361 ndev->cnf.mtu6 = dev->mtu;
362 ndev->cnf.sysctl = NULL;
363 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
364 if (ndev->nd_parms == NULL) {
365 kfree(ndev);
366 return NULL;
367 }
0187bdfb
BH		 368 if (ndev->cnf.forwarding)
369 dev_disable_lro(dev);
322f74a4
IO		 370 /* We refer to the device */
371 dev_hold(dev);
1da177e4 372
322f74a4
IO		 373 if (snmp6_alloc_dev(ndev) < 0) {
374 ADBG((KERN_WARNING
375 "%s(): cannot allocate memory for statistics; dev=%s.\n",
0dc47877 376 __func__, dev->name));
322f74a4 377 neigh_parms_release(&nd_tbl, ndev->nd_parms);
8603e33d
RL		 378 dev_put(dev);
379 kfree(ndev);
322f74a4
IO		 380 return NULL;
381 }
1da177e4 382
322f74a4
IO		 383 if (snmp6_register_dev(ndev) < 0) {
384 ADBG((KERN_WARNING
385 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
0dc47877 386 __func__, dev->name));
322f74a4
IO		 387 neigh_parms_release(&nd_tbl, ndev->nd_parms);
388 ndev->dead = 1;
389 in6_dev_finish_destroy(ndev);
390 return NULL;
391 }
392
393 /* One reference from device. We must do this before
394 * we invoke __ipv6_regen_rndid().
395 */
396 in6_dev_hold(ndev);
1da177e4 397
1b34be74
YH		 398 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
399 ndev->cnf.accept_dad = -1;
400
b077d7ab
YH		 401#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
402 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
403 printk(KERN_INFO
404 "%s: Disabled Multicast RS\n",
405 dev->name);
406 ndev->cnf.rtr_solicits = 0;
407 }
408#endif
409
1da177e4 410#ifdef CONFIG_IPV6_PRIVACY
372e6c8f 411 INIT_LIST_HEAD(&ndev->tempaddr_list);
b24b8a24 412 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 413 if ((dev->flags&IFF_LOOPBACK) ||
414 dev->type == ARPHRD_TUNNEL ||
9625ed72 415 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 416 dev->type == ARPHRD_SIT ||
0be669bb 417 dev->type == ARPHRD_NONE) {
322f74a4
IO		 418 ndev->cnf.use_tempaddr = -1;
419 } else {
420 in6_dev_hold(ndev);
421 ipv6_regen_rndid((unsigned long) ndev);
422 }
1da177e4
LT		 423#endif
424
f24e3d65 425 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 426 ndev->if_flags |= IF_READY;
427
322f74a4
IO		 428 ipv6_mc_init_dev(ndev);
429 ndev->tstamp = jiffies;
f52295a9 430 addrconf_sysctl_register(ndev);
30c4cf57 431 /* protected by rtnl_lock */
cf778b00 432 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 433
434 /* Join all-node multicast group */
f3ee4010 435 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 436
d6ddef9e 437 /* Join all-router multicast group if forwarding is set */
8b2aaede 438 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
d6ddef9e
LW		 439 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
440
1da177e4
LT		 441 return ndev;
442}
443
8e5e8f30 444static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 445{
446 struct inet6_dev *idev;
447
448 ASSERT_RTNL();
449
e21e8467
SH		 450 idev = __in6_dev_get(dev);
451 if (!idev) {
452 idev = ipv6_add_dev(dev);
453 if (!idev)
1da177e4
LT		 454 return NULL;
455 }
c5e33bdd 456
1da177e4
LT		 457 if (dev->flags&IFF_UP)
458 ipv6_mc_up(idev);
459 return idev;
460}
461
462#ifdef CONFIG_SYSCTL
463static void dev_forward_change(struct inet6_dev *idev)
464{
465 struct net_device *dev;
466 struct inet6_ifaddr *ifa;
1da177e4
LT		 467
468 if (!idev)
469 return;
470 dev = idev->dev;
0187bdfb
BH		 471 if (idev->cnf.forwarding)
472 dev_disable_lro(dev);
1da177e4 473 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 474 if (idev->cnf.forwarding)
f3ee4010 475 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 476 else
f3ee4010 477 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4 478 }
502a2ffd 479
480 list_for_each_entry(ifa, &idev->addr_list, if_list) {
2c12a74c
MW		 481 if (ifa->flags&IFA_F_TENTATIVE)
482 continue;
1da177e4
LT		 483 if (idev->cnf.forwarding)
484 addrconf_join_anycast(ifa);
485 else
486 addrconf_leave_anycast(ifa);
487 }
488}
489
490
e186932b 491static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 492{
493 struct net_device *dev;
494 struct inet6_dev *idev;
495
c6d14c84
ED		 496 rcu_read_lock();
497 for_each_netdev_rcu(net, dev) {
1da177e4
LT		 498 idev = __in6_dev_get(dev);
499 if (idev) {
e186932b
PE		 500 int changed = (!idev->cnf.forwarding) ^ (!newf);
501 idev->cnf.forwarding = newf;
1da177e4
LT		 502 if (changed)
503 dev_forward_change(idev);
504 }
1da177e4 505 }
c6d14c84 506 rcu_read_unlock();
1da177e4 507}
c8fecf22 508
013d97e9 509static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
c8fecf22 510{
bff16c2f 511 struct net *net;
013d97e9
FR		 512 int old;
513
514 if (!rtnl_trylock())
515 return restart_syscall();
bff16c2f
PE		 516
517 net = (struct net *)table->extra2;
013d97e9
FR		 518 old = *p;
519 *p = newf;
b325fddb 520
013d97e9
FR		 521 if (p == &net->ipv6.devconf_dflt->forwarding) {
522 rtnl_unlock();
523 return 0;
88af182e 524 }
c8fecf22 525
e186932b 526 if (p == &net->ipv6.devconf_all->forwarding) {
e186932b
PE		 527 net->ipv6.devconf_dflt->forwarding = newf;
528 addrconf_forward_change(net, newf);
013d97e9 529 } else if ((!newf) ^ (!old))
c8fecf22 530 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 531 rtnl_unlock();
c8fecf22 532
013d97e9 533 if (newf)
7b4da532 534 rt6_purge_dflt_routers(net);
b325fddb 535 return 1;
c8fecf22 536}
1da177e4
LT		 537#endif
538
5c578aed 539/* Nobody refers to this ifaddr, destroy it */
1da177e4
LT		 540void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
541{
c2e21293 542 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
547b792c 543
1da177e4
LT		 544#ifdef NET_REFCNT_DEBUG
545 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
546#endif
547
548 in6_dev_put(ifp->idev);
549
550 if (del_timer(&ifp->timer))
e21e8467 551 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp);
1da177e4 552
e9d3e084 553 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
e21e8467 554 pr_warning("Freeing alive inet6 address %p\n", ifp);
1da177e4
LT		 555 return;
556 }
d8d1f30b 557 dst_release(&ifp->rt->dst);
1da177e4 558
e5785985 559 kfree_rcu(ifp, rcu);
1da177e4
LT		 560}
561
e55ffac6
BH		 562static void
563ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
564{
502a2ffd 565 struct list_head *p;
8a6ce0c0 566 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 567
568 /*
569 * Each device address list is sorted in order of scope -
570 * global before linklocal.
571 */
502a2ffd 572 list_for_each(p, &idev->addr_list) {
573 struct inet6_ifaddr *ifa
574 = list_entry(p, struct inet6_ifaddr, if_list);
8a6ce0c0 575 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 576 break;
577 }
578
b54c9b98 579 list_add_tail(&ifp->if_list, p);
e55ffac6
BH		 580}
581
3a88a81d 582static u32 ipv6_addr_hash(const struct in6_addr *addr)
3eb84f49 583{
3eb84f49
YH		 584 /*
585 * We perform the hash function over the last 64 bits of the address
586 * This will include the IEEE address token on links that support it.
587 */
0eae88f3
ED		 588 return jhash_2words((__force u32)addr->s6_addr32[2],
589 (__force u32)addr->s6_addr32[3], 0)
3a88a81d 590 & (IN6_ADDR_HSIZE - 1);
3eb84f49
YH		 591}
592
1da177e4
LT		 593/* On success it returns ifp with increased reference count */
594
595static struct inet6_ifaddr *
596ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 597 int scope, u32 flags)
1da177e4
LT		 598{
599 struct inet6_ifaddr *ifa = NULL;
600 struct rt6_info *rt;
3a88a81d 601 unsigned int hash;
1da177e4 602 int err = 0;
d68b8270
YH		 603 int addr_type = ipv6_addr_type(addr);
604
605 if (addr_type == IPV6_ADDR_ANY ||
606 addr_type & IPV6_ADDR_MULTICAST ||
607 (!(idev->dev->flags & IFF_LOOPBACK) &&
608 addr_type & IPV6_ADDR_LOOPBACK))
609 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 610
8814c4b5 611 rcu_read_lock_bh();
1da177e4
LT		 612 if (idev->dead) {
613 err = -ENODEV; /*XXX*/
614 goto out2;
615 }
616
56d417b1 617 if (idev->cnf.disable_ipv6) {
9bdd8d40
BH		 618 err = -EACCES;
619 goto out2;
620 }
621
5c578aed 622 spin_lock(&addrconf_hash_lock);
1da177e4
LT		 623
624 /* Ignore adding duplicate addresses on an interface */
c346dca1 625 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 626 ADBG(("ipv6_add_addr: already assigned\n"));
627 err = -EEXIST;
628 goto out;
629 }
630
322f74a4 631 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 632
633 if (ifa == NULL) {
634 ADBG(("ipv6_add_addr: malloc failed\n"));
635 err = -ENOBUFS;
636 goto out;
637 }
638
8f031519 639 rt = addrconf_dst_alloc(idev, addr, false);
1da177e4
LT		 640 if (IS_ERR(rt)) {
641 err = PTR_ERR(rt);
642 goto out;
643 }
644
4e3fd7a0 645 ifa->addr = *addr;
1da177e4
LT		 646
647 spin_lock_init(&ifa->lock);
e9d3e084 648 spin_lock_init(&ifa->state_lock);
1da177e4 649 init_timer(&ifa->timer);
c2e21293 650 INIT_HLIST_NODE(&ifa->addr_lst);
1da177e4
LT		 651 ifa->timer.data = (unsigned long) ifa;
652 ifa->scope = scope;
653 ifa->prefix_len = pfxlen;
654 ifa->flags = flags | IFA_F_TENTATIVE;
655 ifa->cstamp = ifa->tstamp = jiffies;
656
57f5f544
KF		 657 ifa->rt = rt;
658
1da177e4
LT		 659 ifa->idev = idev;
660 in6_dev_hold(idev);
661 /* For caller */
662 in6_ifa_hold(ifa);
663
664 /* Add to big hash table */
665 hash = ipv6_addr_hash(addr);
666
5c578aed 667 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
5c578aed 668 spin_unlock(&addrconf_hash_lock);
1da177e4
LT		 669
670 write_lock(&idev->lock);
671 /* Add to inet6_dev unicast addr list. */
e55ffac6 672 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 673
674#ifdef CONFIG_IPV6_PRIVACY
675 if (ifa->flags&IFA_F_TEMPORARY) {
372e6c8f 676 list_add(&ifa->tmp_list, &idev->tempaddr_list);
1da177e4
LT		 677 in6_ifa_hold(ifa);
678 }
679#endif
680
1da177e4
LT		 681 in6_ifa_hold(ifa);
682 write_unlock(&idev->lock);
683out2:
8814c4b5 684 rcu_read_unlock_bh();
1da177e4 685
fd92833a 686 if (likely(err == 0))
e041c683 687 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 688 else {
689 kfree(ifa);
690 ifa = ERR_PTR(err);
691 }
692
693 return ifa;
694out:
5c578aed 695 spin_unlock(&addrconf_hash_lock);
1da177e4
LT		 696 goto out2;
697}
698
699/* This function wants to get referenced ifp and releases it before return */
700
701static void ipv6_del_addr(struct inet6_ifaddr *ifp)
702{
502a2ffd 703 struct inet6_ifaddr *ifa, *ifn;
1da177e4 704 struct inet6_dev *idev = ifp->idev;
4c5ff6a6 705 int state;
1da177e4
LT		 706 int deleted = 0, onlink = 0;
707 unsigned long expires = jiffies;
708
4c5ff6a6
HX		 709 spin_lock_bh(&ifp->state_lock);
710 state = ifp->state;
e9d3e084 711 ifp->state = INET6_IFADDR_STATE_DEAD;
4c5ff6a6
HX		 712 spin_unlock_bh(&ifp->state_lock);
713
714 if (state == INET6_IFADDR_STATE_DEAD)
715 goto out;
1da177e4 716
5c578aed 717 spin_lock_bh(&addrconf_hash_lock);
718 hlist_del_init_rcu(&ifp->addr_lst);
5c578aed 719 spin_unlock_bh(&addrconf_hash_lock);
1da177e4
LT		 720
721 write_lock_bh(&idev->lock);
722#ifdef CONFIG_IPV6_PRIVACY
723 if (ifp->flags&IFA_F_TEMPORARY) {
372e6c8f 724 list_del(&ifp->tmp_list);
725 if (ifp->ifpub) {
726 in6_ifa_put(ifp->ifpub);
727 ifp->ifpub = NULL;
1da177e4 728 }
372e6c8f 729 __in6_ifa_put(ifp);
1da177e4
LT		 730 }
731#endif
732
502a2ffd 733 list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
1da177e4 734 if (ifa == ifp) {
502a2ffd 735 list_del_init(&ifp->if_list);
1da177e4 736 __in6_ifa_put(ifp);
502a2ffd 737
1da177e4
LT		 738 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
739 break;
740 deleted = 1;
1d142804 741 continue;
1da177e4
LT		 742 } else if (ifp->flags & IFA_F_PERMANENT) {
743 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
744 ifp->prefix_len)) {
745 if (ifa->flags & IFA_F_PERMANENT) {
746 onlink = 1;
747 if (deleted)
748 break;
749 } else {
750 unsigned long lifetime;
751
752 if (!onlink)
753 onlink = -1;
754
755 spin_lock(&ifa->lock);
4bed72e4
YH		 756
757 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
758 /*
759 * Note: Because this address is
760 * not permanent, lifetime <
761 * LONG_MAX / HZ here.
762 */
1da177e4
LT		 763 if (time_before(expires,
764 ifa->tstamp + lifetime * HZ))
765 expires = ifa->tstamp + lifetime * HZ;
766 spin_unlock(&ifa->lock);
767 }
768 }
769 }
770 }
771 write_unlock_bh(&idev->lock);
772
b2238566
AV		 773 addrconf_del_timer(ifp);
774
1da177e4
LT		 775 ipv6_ifa_notify(RTM_DELADDR, ifp);
776
e041c683 777 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 778
1da177e4
LT		 779 /*
780 * Purge or update corresponding prefix
781 *
782 * 1) we don't purge prefix here if address was not permanent.
783 * prefix is managed by its own lifetime.
784 * 2) if there're no addresses, delete prefix.
785 * 3) if there're still other permanent address(es),
786 * corresponding prefix is still permanent.
787 * 4) otherwise, update prefix lifetime to the
788 * longest valid lifetime among the corresponding
789 * addresses on the device.
790 * Note: subsequent RA will update lifetime.
791 *
792 * --yoshfuji
793 */
794 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
795 struct in6_addr prefix;
796 struct rt6_info *rt;
c346dca1 797 struct net *net = dev_net(ifp->idev->dev);
1da177e4 798 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 799 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 800
2b5ead46 801 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 802 if (onlink == 0) {
e0a1ad73 803 ip6_del_rt(rt);
1da177e4
LT		 804 rt = NULL;
805 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
1716a961 806 rt6_set_expires(rt, expires);
1da177e4
LT		 807 }
808 }
d8d1f30b 809 dst_release(&rt->dst);
1da177e4
LT		 810 }
811
c3968a85
DW		 812 /* clean up prefsrc entries */
813 rt6_remove_prefsrc(ifp);
4c5ff6a6 814out:
1da177e4
LT		 815 in6_ifa_put(ifp);
816}
817
818#ifdef CONFIG_IPV6_PRIVACY
819static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
820{
821 struct inet6_dev *idev = ifp->idev;
822 struct in6_addr addr, *tmpaddr;
76f793e3 823 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
eac55bf9 824 unsigned long regen_advance;
1da177e4
LT		 825 int tmp_plen;
826 int ret = 0;
827 int max_addresses;
95c385b4 828 u32 addr_flags;
76f793e3 829 unsigned long now = jiffies;
1da177e4
LT		 830
831 write_lock(&idev->lock);
832 if (ift) {
833 spin_lock_bh(&ift->lock);
834 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
835 spin_unlock_bh(&ift->lock);
836 tmpaddr = &addr;
837 } else {
838 tmpaddr = NULL;
839 }
840retry:
841 in6_dev_hold(idev);
842 if (idev->cnf.use_tempaddr <= 0) {
843 write_unlock(&idev->lock);
844 printk(KERN_INFO
845 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
846 in6_dev_put(idev);
847 ret = -1;
848 goto out;
849 }
850 spin_lock_bh(&ifp->lock);
851 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
852 idev->cnf.use_tempaddr = -1; /*XXX*/
853 spin_unlock_bh(&ifp->lock);
854 write_unlock(&idev->lock);
855 printk(KERN_WARNING
856 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
857 in6_dev_put(idev);
858 ret = -1;
859 goto out;
860 }
861 in6_ifa_hold(ifp);
862 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
863 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
864 spin_unlock_bh(&ifp->lock);
865 write_unlock(&idev->lock);
866 printk(KERN_WARNING
867 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
868 in6_ifa_put(ifp);
869 in6_dev_put(idev);
870 ret = -1;
871 goto out;
872 }
873 memcpy(&addr.s6_addr[8], idev->rndid, 8);
76f793e3 874 age = (now - ifp->tstamp) / HZ;
1da177e4
LT		 875 tmp_valid_lft = min_t(__u32,
876 ifp->valid_lft,
7a876b0e 877 idev->cnf.temp_valid_lft + age);
1ab1457c
YH		 878 tmp_prefered_lft = min_t(__u32,
879 ifp->prefered_lft,
7a876b0e 880 idev->cnf.temp_prefered_lft + age -
784e2710 881 idev->cnf.max_desync_factor);
1da177e4
LT		 882 tmp_plen = ifp->prefix_len;
883 max_addresses = idev->cnf.max_addresses;
1da177e4
LT		 884 tmp_tstamp = ifp->tstamp;
885 spin_unlock_bh(&ifp->lock);
886
eac55bf9
BB		 887 regen_advance = idev->cnf.regen_max_retry *
888 idev->cnf.dad_transmits *
889 idev->nd_parms->retrans_time / HZ;
1da177e4 890 write_unlock(&idev->lock);
95c385b4 891
eac55bf9
BB		 892 /* A temporary address is created only if this calculated Preferred
893 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
894 * an implementation must not create a temporary address with a zero
895 * Preferred Lifetime.
896 */
897 if (tmp_prefered_lft <= regen_advance) {
898 in6_ifa_put(ifp);
899 in6_dev_put(idev);
900 ret = -1;
901 goto out;
902 }
903
95c385b4
NH		 904 addr_flags = IFA_F_TEMPORARY;
905 /* set in addrconf_prefix_rcv() */
906 if (ifp->flags & IFA_F_OPTIMISTIC)
907 addr_flags |= IFA_F_OPTIMISTIC;
908
1da177e4 909 ift = !max_addresses ||
1ab1457c 910 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 911 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 912 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
913 addr_flags) : NULL;
1da177e4
LT		 914 if (!ift || IS_ERR(ift)) {
915 in6_ifa_put(ifp);
916 in6_dev_put(idev);
917 printk(KERN_INFO
918 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
919 tmpaddr = &addr;
920 write_lock(&idev->lock);
921 goto retry;
922 }
923
924 spin_lock_bh(&ift->lock);
925 ift->ifpub = ifp;
926 ift->valid_lft = tmp_valid_lft;
927 ift->prefered_lft = tmp_prefered_lft;
76f793e3 928 ift->cstamp = now;
1da177e4
LT		 929 ift->tstamp = tmp_tstamp;
930 spin_unlock_bh(&ift->lock);
931
cf22f9a2 932 addrconf_dad_start(ift);
1da177e4
LT		 933 in6_ifa_put(ift);
934 in6_dev_put(idev);
935out:
936 return ret;
937}
938#endif
939
940/*
072047e4 941 * Choose an appropriate source address (RFC3484)
1da177e4 942 */
a9b05723
YH		 943enum {
944 IPV6_SADDR_RULE_INIT = 0,
945 IPV6_SADDR_RULE_LOCAL,
946 IPV6_SADDR_RULE_SCOPE,
947 IPV6_SADDR_RULE_PREFERRED,
948#ifdef CONFIG_IPV6_MIP6
949 IPV6_SADDR_RULE_HOA,
950#endif
951 IPV6_SADDR_RULE_OIF,
952 IPV6_SADDR_RULE_LABEL,
953#ifdef CONFIG_IPV6_PRIVACY
954 IPV6_SADDR_RULE_PRIVACY,
955#endif
956 IPV6_SADDR_RULE_ORCHID,
957 IPV6_SADDR_RULE_PREFIX,
958 IPV6_SADDR_RULE_MAX
959};
960
072047e4 961struct ipv6_saddr_score {
a9b05723
YH		 962 int rule;
963 int addr_type;
964 struct inet6_ifaddr *ifa;
965 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
966 int scopedist;
967 int matchlen;
072047e4
YH		 968};
969
a9b05723 970struct ipv6_saddr_dst {
9acd9f3a 971 const struct in6_addr *addr;
a9b05723
YH		 972 int ifindex;
973 int scope;
974 int label;
7cbca67c 975 unsigned int prefs;
a9b05723 976};
072047e4 977
b6f99a21 978static inline int ipv6_saddr_preferred(int type)
1da177e4 979{
45bb0060 980 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
072047e4
YH		 981 return 1;
982 return 0;
1da177e4
LT		 983}
984
3de23255
BT		 985static int ipv6_get_saddr_eval(struct net *net,
986 struct ipv6_saddr_score *score,
a9b05723
YH		 987 struct ipv6_saddr_dst *dst,
988 int i)
989{
990 int ret;
991
992 if (i <= score->rule) {
993 switch (i) {
994 case IPV6_SADDR_RULE_SCOPE:
995 ret = score->scopedist;
996 break;
997 case IPV6_SADDR_RULE_PREFIX:
998 ret = score->matchlen;
999 break;
1000 default:
1001 ret = !!test_bit(i, score->scorebits);
1002 }
1003 goto out;
1004 }
1005
1006 switch (i) {
1007 case IPV6_SADDR_RULE_INIT:
1008 /* Rule 0: remember if hiscore is not ready yet */
1009 ret = !!score->ifa;
1010 break;
1011 case IPV6_SADDR_RULE_LOCAL:
1012 /* Rule 1: Prefer same address */
1013 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1014 break;
1015 case IPV6_SADDR_RULE_SCOPE:
1016 /* Rule 2: Prefer appropriate scope
1017 *
1018 * ret
1019 * ^
1020 * -1 | d 15
1021 * ---+--+-+---> scope
1022 * |
1023 * | d is scope of the destination.
1024 * B-d | \
1025 * | \ <- smaller scope is better if
1026 * B-15 | \ if scope is enough for destinaion.
1027 * | ret = B - scope (-1 <= scope >= d <= 15).
1028 * d-C-1 | /
1029 * |/ <- greater is better
1030 * -C / if scope is not enough for destination.
1031 * /| ret = scope - C (-1 <= d < scope <= 15).
1032 *
1033 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1034 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1035 * Assume B = 0 and we get C > 29.
1036 */
1037 ret = __ipv6_addr_src_scope(score->addr_type);
1038 if (ret >= dst->scope)
1039 ret = -ret;
1040 else
1041 ret -= 128; /* 30 is enough */
1042 score->scopedist = ret;
1043 break;
1044 case IPV6_SADDR_RULE_PREFERRED:
1045 /* Rule 3: Avoid deprecated and optimistic addresses */
1046 ret = ipv6_saddr_preferred(score->addr_type) ||
1047 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1048 break;
1049#ifdef CONFIG_IPV6_MIP6
1050 case IPV6_SADDR_RULE_HOA:
7cbca67c 1051 {
a9b05723 1052 /* Rule 4: Prefer home address */
7cbca67c
YH		 1053 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1054 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1055 break;
7cbca67c 1056 }
a9b05723
YH		 1057#endif
1058 case IPV6_SADDR_RULE_OIF:
1059 /* Rule 5: Prefer outgoing interface */
1060 ret = (!dst->ifindex ||
1061 dst->ifindex == score->ifa->idev->dev->ifindex);
1062 break;
1063 case IPV6_SADDR_RULE_LABEL:
1064 /* Rule 6: Prefer matching label */
3de23255
BT		 1065 ret = ipv6_addr_label(net,
1066 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1067 score->ifa->idev->dev->ifindex) == dst->label;
1068 break;
1069#ifdef CONFIG_IPV6_PRIVACY
1070 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1071 {
a9b05723 1072 /* Rule 7: Prefer public address
25985edc 1073 * Note: prefer temporary address if use_tempaddr >= 2
a9b05723 1074 */
7cbca67c
YH		 1075 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1076 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1077 score->ifa->idev->cnf.use_tempaddr >= 2;
1078 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1079 break;
7cbca67c 1080 }
a9b05723
YH		 1081#endif
1082 case IPV6_SADDR_RULE_ORCHID:
1083 /* Rule 8-: Prefer ORCHID vs ORCHID or
1084 * non-ORCHID vs non-ORCHID
1085 */
1086 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1087 ipv6_addr_orchid(dst->addr));
1088 break;
1089 case IPV6_SADDR_RULE_PREFIX:
1090 /* Rule 8: Use longest matching prefix */
1091 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1092 dst->addr);
1093 break;
1094 default:
1095 ret = 0;
1096 }
1097
1098 if (ret)
1099 __set_bit(i, score->scorebits);
1100 score->rule = i;
1101out:
1102 return ret;
1103}
1104
191cd582 1105int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
9acd9f3a 1106 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1107 struct in6_addr *saddr)
1da177e4 1108{
a9b05723
YH		 1109 struct ipv6_saddr_score scores[2],
1110 *score = &scores[0], *hiscore = &scores[1];
a9b05723 1111 struct ipv6_saddr_dst dst;
072047e4 1112 struct net_device *dev;
a9b05723 1113 int dst_type;
1da177e4 1114
a9b05723
YH		 1115 dst_type = __ipv6_addr_type(daddr);
1116 dst.addr = daddr;
1117 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1118 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1119 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1120 dst.prefs = prefs;
a9b05723
YH		 1121
1122 hiscore->rule = -1;
1123 hiscore->ifa = NULL;
1da177e4 1124
8814c4b5 1125 rcu_read_lock();
1da177e4 1126
c6d14c84 1127 for_each_netdev_rcu(net, dev) {
072047e4 1128 struct inet6_dev *idev;
072047e4 1129
a9b05723 1130 /* Candidate Source Address (section 4)
072047e4
YH		 1131 * - multicast and link-local destination address,
1132 * the set of candidate source address MUST only
1133 * include addresses assigned to interfaces
1134 * belonging to the same link as the outgoing
1135 * interface.
1136 * (- For site-local destination addresses, the
1137 * set of candidate source addresses MUST only
1138 * include addresses assigned to interfaces
1139 * belonging to the same site as the outgoing
1140 * interface.)
1141 */
a9b05723
YH		 1142 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1143 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1144 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1145 continue;
1da177e4 1146
1da177e4 1147 idev = __in6_dev_get(dev);
072047e4
YH		 1148 if (!idev)
1149 continue;
1150
1151 read_lock_bh(&idev->lock);
502a2ffd 1152 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
a9b05723 1153 int i;
072047e4 1154
a9b05723 1155 /*
6b3ae80a
YH		 1156 * - Tentative Address (RFC2462 section 5.4)
1157 * - A tentative address is not considered
1158 * "assigned to an interface" in the traditional
95c385b4 1159 * sense, unless it is also flagged as optimistic.
6b3ae80a 1160 * - Candidate Source Address (section 4)
072047e4
YH		 1161 * - In any case, anycast addresses, multicast
1162 * addresses, and the unspecified address MUST
1163 * NOT be included in a candidate set.
1164 */
a9b05723
YH		 1165 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1166 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1167 continue;
a9b05723
YH		 1168
1169 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1170
1171 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1172 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1173 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1174 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1175 "assigned as unicast address on %s",
1176 dev->name);
1177 continue;
1178 }
1179
a9b05723
YH		 1180 score->rule = -1;
1181 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1182
1183 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1184 int minihiscore, miniscore;
1185
3de23255
BT		 1186 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1187 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1188
1189 if (minihiscore > miniscore) {
1190 if (i == IPV6_SADDR_RULE_SCOPE &&
1191 score->scopedist > 0) {
1192 /*
1193 * special case:
1194 * each remaining entry
1195 * has too small (not enough)
1196 * scope, because ifa entries
1197 * are sorted by their scope
1198 * values.
1199 */
1200 goto try_nextdev;
1201 }
1202 break;
1203 } else if (minihiscore < miniscore) {
a9b05723
YH		 1204 if (hiscore->ifa)
1205 in6_ifa_put(hiscore->ifa);
1206
1207 in6_ifa_hold(score->ifa);
1208
a0bffffc 1209 swap(hiscore, score);
a9b05723
YH		 1210
1211 /* restore our iterator */
1212 score->ifa = hiscore->ifa;
1213
1214 break;
1da177e4 1215 }
072047e4 1216 }
1da177e4 1217 }
a9b05723 1218try_nextdev:
072047e4 1219 read_unlock_bh(&idev->lock);
1da177e4 1220 }
8814c4b5 1221 rcu_read_unlock();
1da177e4 1222
a9b05723 1223 if (!hiscore->ifa)
072047e4 1224 return -EADDRNOTAVAIL;
1ab1457c 1225
4e3fd7a0 1226 *saddr = hiscore->ifa->addr;
a9b05723 1227 in6_ifa_put(hiscore->ifa);
072047e4 1228 return 0;
1da177e4 1229}
5e5f3f0f 1230EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1231
95c385b4
NH		 1232int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1233 unsigned char banned_flags)
1da177e4
LT		 1234{
1235 struct inet6_dev *idev;
1236 int err = -EADDRNOTAVAIL;
1237
8814c4b5 1238 rcu_read_lock();
e21e8467
SH		 1239 idev = __in6_dev_get(dev);
1240 if (idev) {
1da177e4
LT		 1241 struct inet6_ifaddr *ifp;
1242
1243 read_lock_bh(&idev->lock);
502a2ffd 1244 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1245 if (ifp->scope == IFA_LINK &&
1246 !(ifp->flags & banned_flags)) {
4e3fd7a0 1247 *addr = ifp->addr;
1da177e4
LT		 1248 err = 0;
1249 break;
1250 }
1251 }
1252 read_unlock_bh(&idev->lock);
1253 }
8814c4b5 1254 rcu_read_unlock();
1da177e4
LT		 1255 return err;
1256}
1257
1258static int ipv6_count_addresses(struct inet6_dev *idev)
1259{
1260 int cnt = 0;
1261 struct inet6_ifaddr *ifp;
1262
1263 read_lock_bh(&idev->lock);
502a2ffd 1264 list_for_each_entry(ifp, &idev->addr_list, if_list)
1da177e4
LT		 1265 cnt++;
1266 read_unlock_bh(&idev->lock);
1267 return cnt;
1268}
1269
b71d1d42 1270int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
bfeade08 1271 struct net_device *dev, int strict)
1da177e4 1272{
eedf042a 1273 struct inet6_ifaddr *ifp;
c2e21293 1274 struct hlist_node *node;
3a88a81d 1275 unsigned int hash = ipv6_addr_hash(addr);
1da177e4 1276
5c578aed 1277 rcu_read_lock_bh();
1278 hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1279 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1280 continue;
1da177e4 1281 if (ipv6_addr_equal(&ifp->addr, addr) &&
eedf042a
SH		 1282 !(ifp->flags&IFA_F_TENTATIVE) &&
1283 (dev == NULL || ifp->idev->dev == dev ||
1284 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1285 rcu_read_unlock_bh();
1286 return 1;
1da177e4
LT		 1287 }
1288 }
5c578aed 1289
eedf042a
SH		 1290 rcu_read_unlock_bh();
1291 return 0;
1da177e4 1292}
7159039a
YH		 1293EXPORT_SYMBOL(ipv6_chk_addr);
1294
3e81c6da
DM		 1295static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1296 struct net_device *dev)
1da177e4 1297{
3e81c6da 1298 unsigned int hash = ipv6_addr_hash(addr);
c2e21293 1299 struct inet6_ifaddr *ifp;
1300 struct hlist_node *node;
1da177e4 1301
c2e21293 1302 hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1303 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1304 continue;
1da177e4
LT		 1305 if (ipv6_addr_equal(&ifp->addr, addr)) {
1306 if (dev == NULL || ifp->idev->dev == dev)
3e81c6da 1307 return true;
1da177e4
LT		 1308 }
1309 }
3e81c6da 1310 return false;
1da177e4
LT		 1311}
1312
b71d1d42 1313int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
52eeeb84
YH		 1314{
1315 struct inet6_dev *idev;
1316 struct inet6_ifaddr *ifa;
1317 int onlink;
1318
1319 onlink = 0;
1320 rcu_read_lock();
1321 idev = __in6_dev_get(dev);
1322 if (idev) {
1323 read_lock_bh(&idev->lock);
502a2ffd 1324 list_for_each_entry(ifa, &idev->addr_list, if_list) {
52eeeb84
YH		 1325 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1326 ifa->prefix_len);
1327 if (onlink)
1328 break;
1329 }
1330 read_unlock_bh(&idev->lock);
1331 }
1332 rcu_read_unlock();
1333 return onlink;
1334}
52eeeb84
YH		 1335EXPORT_SYMBOL(ipv6_chk_prefix);
1336
9acd9f3a 1337struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1338 struct net_device *dev, int strict)
1da177e4 1339{
b79d1d54 1340 struct inet6_ifaddr *ifp, *result = NULL;
3a88a81d 1341 unsigned int hash = ipv6_addr_hash(addr);
b79d1d54 1342 struct hlist_node *node;
1da177e4 1343
5c578aed 1344 rcu_read_lock_bh();
4f70ecca 1345 hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1346 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1347 continue;
1da177e4
LT		 1348 if (ipv6_addr_equal(&ifp->addr, addr)) {
1349 if (dev == NULL || ifp->idev->dev == dev ||
1350 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
b79d1d54 1351 result = ifp;
1da177e4
LT		 1352 in6_ifa_hold(ifp);
1353 break;
1354 }
1355 }
1356 }
5c578aed 1357 rcu_read_unlock_bh();
1da177e4 1358
b79d1d54 1359 return result;
1da177e4
LT		 1360}
1361
1da177e4
LT		 1362/* Gets referenced address, destroys ifaddr */
1363
cc411d0b 1364static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
1da177e4 1365{
1da177e4
LT		 1366 if (ifp->flags&IFA_F_PERMANENT) {
1367 spin_lock_bh(&ifp->lock);
1368 addrconf_del_timer(ifp);
1369 ifp->flags |= IFA_F_TENTATIVE;
cc411d0b
BH		 1370 if (dad_failed)
1371 ifp->flags |= IFA_F_DADFAILED;
1da177e4 1372 spin_unlock_bh(&ifp->lock);
e2577a06
HX		 1373 if (dad_failed)
1374 ipv6_ifa_notify(0, ifp);
1da177e4
LT		 1375 in6_ifa_put(ifp);
1376#ifdef CONFIG_IPV6_PRIVACY
1377 } else if (ifp->flags&IFA_F_TEMPORARY) {
1378 struct inet6_ifaddr *ifpub;
1379 spin_lock_bh(&ifp->lock);
1380 ifpub = ifp->ifpub;
1381 if (ifpub) {
1382 in6_ifa_hold(ifpub);
1383 spin_unlock_bh(&ifp->lock);
1384 ipv6_create_tempaddr(ifpub, ifp);
1385 in6_ifa_put(ifpub);
1386 } else {
1387 spin_unlock_bh(&ifp->lock);
1388 }
1389 ipv6_del_addr(ifp);
1390#endif
1391 } else
1392 ipv6_del_addr(ifp);
1393}
1394
f2344a13
HX		 1395static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1396{
1397 int err = -ENOENT;
1398
1399 spin_lock(&ifp->state_lock);
1400 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1401 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1402 err = 0;
1403 }
1404 spin_unlock(&ifp->state_lock);
1405
1406 return err;
1407}
1408
3c21edbd
YH		 1409void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1410{
1b34be74 1411 struct inet6_dev *idev = ifp->idev;
9bdd8d40 1412
853dc2e0
UB		 1413 if (addrconf_dad_end(ifp)) {
1414 in6_ifa_put(ifp);
f2344a13 1415 return;
853dc2e0 1416 }
f2344a13 1417
9bdd8d40 1418 if (net_ratelimit())
0522fea6
JR		 1419 printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n",
1420 ifp->idev->dev->name, &ifp->addr);
9bdd8d40 1421
1b34be74
YH		 1422 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1423 struct in6_addr addr;
1424
1425 addr.s6_addr32[0] = htonl(0xfe800000);
1426 addr.s6_addr32[1] = 0;
1427
1428 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1429 ipv6_addr_equal(&ifp->addr, &addr)) {
1430 /* DAD failed for link-local based on MAC address */
1431 idev->cnf.disable_ipv6 = 1;
9bdd8d40
BH		 1432
1433 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1434 ifp->idev->dev->name);
1b34be74
YH		 1435 }
1436 }
1437
cc411d0b 1438 addrconf_dad_stop(ifp, 1);
3c21edbd 1439}
1da177e4
LT		 1440
1441/* Join to solicited addr multicast group. */
1442
b71d1d42 1443void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
1da177e4
LT		 1444{
1445 struct in6_addr maddr;
1446
1447 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1448 return;
1449
1450 addrconf_addr_solict_mult(addr, &maddr);
1451 ipv6_dev_mc_inc(dev, &maddr);
1452}
1453
b71d1d42 1454void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
1da177e4
LT		 1455{
1456 struct in6_addr maddr;
1457
1458 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1459 return;
1460
1461 addrconf_addr_solict_mult(addr, &maddr);
1462 __ipv6_dev_mc_dec(idev, &maddr);
1463}
1464
20380731 1465static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1466{
1467 struct in6_addr addr;
2bda8a0c
BM		 1468 if (ifp->prefix_len == 127) /* RFC 6164 */
1469 return;
1da177e4
LT		 1470 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1471 if (ipv6_addr_any(&addr))
1472 return;
1473 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1474}
1475
20380731 1476static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1477{
1478 struct in6_addr addr;
32019e65
YH		 1479 if (ifp->prefix_len == 127) /* RFC 6164 */
1480 return;
1da177e4
LT		 1481 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1482 if (ipv6_addr_any(&addr))
1483 return;
1484 __ipv6_dev_ac_dec(ifp->idev, &addr);
1485}
1486
073a8e0e
YH		 1487static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1488{
1489 if (dev->addr_len != ETH_ALEN)
1490 return -1;
1491 memcpy(eui, dev->dev_addr, 3);
1492 memcpy(eui + 5, dev->dev_addr + 3, 3);
1493
1494 /*
1495 * The zSeries OSA network cards can be shared among various
1496 * OS instances, but the OSA cards have only one MAC address.
1497 * This leads to duplicate address conflicts in conjunction
1498 * with IPv6 if more than one instance uses the same card.
1499 *
1500 * The driver for these cards can deliver a unique 16-bit
1501 * identifier for each instance sharing the same card. It is
1502 * placed instead of 0xFFFE in the interface identifier. The
1503 * "u" bit of the interface identifier is not inverted in this
1504 * case. Hence the resulting interface identifier has local
1505 * scope according to RFC2373.
1506 */
1507 if (dev->dev_id) {
1508 eui[3] = (dev->dev_id >> 8) & 0xFF;
1509 eui[4] = dev->dev_id & 0xFF;
1510 } else {
1511 eui[3] = 0xFF;
1512 eui[4] = 0xFE;
1513 eui[0] ^= 2;
1514 }
1515 return 0;
1516}
1517
06a4c1c5 1518static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1519{
1520 if (dev->addr_len != IEEE802154_ADDR_LEN)
1521 return -1;
1522 memcpy(eui, dev->dev_addr, 8);
1523 return 0;
1524}
1525
073a8e0e
YH		 1526static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1527{
1528 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1529 if (dev->addr_len != ARCNET_ALEN)
1530 return -1;
1531 memset(eui, 0, 7);
8e5e8f30 1532 eui[7] = *(u8 *)dev->dev_addr;
073a8e0e
YH		 1533 return 0;
1534}
1535
1536static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1537{
1538 if (dev->addr_len != INFINIBAND_ALEN)
1539 return -1;
1540 memcpy(eui, dev->dev_addr + 12, 8);
1541 eui[0] |= 2;
1542 return 0;
1543}
1544
c61393ea 1545static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
dfd982ba 1546{
9af28511
SH		 1547 if (addr == 0)
1548 return -1;
dfd982ba
YH		 1549 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1550 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1551 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1552 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1553 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1554 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1555 eui[1] = 0;
1556 eui[2] = 0x5E;
1557 eui[3] = 0xFE;
1558 memcpy(eui + 4, &addr, 4);
1559 return 0;
1560}
dfd982ba
YH		 1561
1562static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1563{
1564 if (dev->priv_flags & IFF_ISATAP)
1565 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1566 return -1;
1567}
1568
aee80b54 1569static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
1570{
1571 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1572}
1573
1da177e4
LT		 1574static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1575{
1576 switch (dev->type) {
1577 case ARPHRD_ETHER:
1578 case ARPHRD_FDDI:
1579 case ARPHRD_IEEE802_TR:
073a8e0e 1580 return addrconf_ifid_eui48(eui, dev);
1da177e4 1581 case ARPHRD_ARCNET:
073a8e0e 1582 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1583 case ARPHRD_INFINIBAND:
073a8e0e 1584 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1585 case ARPHRD_SIT:
dfd982ba 1586 return addrconf_ifid_sit(eui, dev);
aee80b54 1587 case ARPHRD_IPGRE:
1588 return addrconf_ifid_gre(eui, dev);
06a4c1c5 1589 case ARPHRD_IEEE802154:
1590 return addrconf_ifid_eui64(eui, dev);
1da177e4
LT		 1591 }
1592 return -1;
1593}
1594
1595static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1596{
1597 int err = -1;
1598 struct inet6_ifaddr *ifp;
1599
1600 read_lock_bh(&idev->lock);
502a2ffd 1601 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1da177e4
LT		 1602 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1603 memcpy(eui, ifp->addr.s6_addr+8, 8);
1604 err = 0;
1605 break;
1606 }
1607 }
1608 read_unlock_bh(&idev->lock);
1609 return err;
1610}
1611
1612#ifdef CONFIG_IPV6_PRIVACY
1613/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1614static int __ipv6_regen_rndid(struct inet6_dev *idev)
1615{
1da177e4 1616regen:
955189ef 1617 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1618 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1619
1620 /*
1621 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1622 * check if generated address is not inappropriate
1623 *
1624 * - Reserved subnet anycast (RFC 2526)
1625 * 11111101 11....11 1xxxxxxx
c7dc89c0 1626 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1627 * 00-00-5E-FE-xx-xx-xx-xx
1628 * - value 0
1629 * - XXX: already assigned to an address on the device
1630 */
1ab1457c 1631 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1632 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1633 (idev->rndid[7]&0x80))
1634 goto regen;
1635 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1636 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1637 goto regen;
1638 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1639 goto regen;
1640 }
1641
1642 return 0;
1643}
1644
1645static void ipv6_regen_rndid(unsigned long data)
1646{
1647 struct inet6_dev *idev = (struct inet6_dev *) data;
1648 unsigned long expires;
1649
8814c4b5 1650 rcu_read_lock_bh();
1da177e4
LT		 1651 write_lock_bh(&idev->lock);
1652
1653 if (idev->dead)
1654 goto out;
1655
1656 if (__ipv6_regen_rndid(idev) < 0)
1657 goto out;
1ab1457c 1658
1da177e4 1659 expires = jiffies +
1ab1457c 1660 idev->cnf.temp_prefered_lft * HZ -
784e2710
BH		 1661 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time -
1662 idev->cnf.max_desync_factor * HZ;
1da177e4
LT		 1663 if (time_before(expires, jiffies)) {
1664 printk(KERN_WARNING
1665 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1666 idev->dev->name);
1667 goto out;
1668 }
1669
1670 if (!mod_timer(&idev->regen_timer, expires))
1671 in6_dev_hold(idev);
1672
1673out:
1674 write_unlock_bh(&idev->lock);
8814c4b5 1675 rcu_read_unlock_bh();
1da177e4
LT		 1676 in6_dev_put(idev);
1677}
1678
8e5e8f30
EZ		 1679static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
1680{
1da177e4
LT		 1681 int ret = 0;
1682
1683 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1684 ret = __ipv6_regen_rndid(idev);
1685 return ret;
1686}
1687#endif
1688
1689/*
1690 * Add prefix route.
1691 */
1692
1693static void
1694addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1695 unsigned long expires, u32 flags)
1da177e4 1696{
86872cb5
TG		 1697 struct fib6_config cfg = {
1698 .fc_table = RT6_TABLE_PREFIX,
1699 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1700 .fc_ifindex = dev->ifindex,
1701 .fc_expires = expires,
1702 .fc_dst_len = plen,
1703 .fc_flags = RTF_UP | flags,
c346dca1 1704 .fc_nlinfo.nl_net = dev_net(dev),
f410a1fb 1705 .fc_protocol = RTPROT_KERNEL,
86872cb5 1706 };
1da177e4 1707
4e3fd7a0 1708 cfg.fc_dst = *pfx;
1da177e4
LT		 1709
1710 /* Prevent useless cloning on PtP SIT.
1711 This thing is done here expecting that the whole
1712 class of non-broadcast devices need not cloning.
1713 */
0be669bb 1714#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1715 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1716 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1717#endif
1da177e4 1718
86872cb5 1719 ip6_route_add(&cfg);
1da177e4
LT		 1720}
1721
14ef37b6
AH		 1722
1723static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
1724 int plen,
1725 const struct net_device *dev,
1726 u32 flags, u32 noflags)
1727{
1728 struct fib6_node *fn;
1729 struct rt6_info *rt = NULL;
1730 struct fib6_table *table;
1731
1732 table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
1733 if (table == NULL)
1734 return NULL;
1735
1736 write_lock_bh(&table->tb6_lock);
1737 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
1738 if (!fn)
1739 goto out;
1740 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
d1918542 1741 if (rt->dst.dev->ifindex != dev->ifindex)
14ef37b6
AH		 1742 continue;
1743 if ((rt->rt6i_flags & flags) != flags)
1744 continue;
1745 if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0))
1746 continue;
1747 dst_hold(&rt->dst);
1748 break;
1749 }
1750out:
1751 write_unlock_bh(&table->tb6_lock);
1752 return rt;
1753}
1754
1755
1da177e4
LT		 1756/* Create "default" multicast route to the interface */
1757
1758static void addrconf_add_mroute(struct net_device *dev)
1759{
86872cb5
TG		 1760 struct fib6_config cfg = {
1761 .fc_table = RT6_TABLE_LOCAL,
1762 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1763 .fc_ifindex = dev->ifindex,
1764 .fc_dst_len = 8,
1765 .fc_flags = RTF_UP,
c346dca1 1766 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1767 };
1768
1769 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1770
1771 ip6_route_add(&cfg);
1da177e4
LT		 1772}
1773
0be669bb 1774#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1775static void sit_route_add(struct net_device *dev)
1776{
86872cb5
TG		 1777 struct fib6_config cfg = {
1778 .fc_table = RT6_TABLE_MAIN,
1779 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1780 .fc_ifindex = dev->ifindex,
1781 .fc_dst_len = 96,
1782 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1783 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1784 };
1da177e4
LT		 1785
1786 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1787 ip6_route_add(&cfg);
1da177e4 1788}
0be669bb 1789#endif
1da177e4
LT		 1790
1791static void addrconf_add_lroute(struct net_device *dev)
1792{
1793 struct in6_addr addr;
1794
1795 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1796 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1797}
1798
1799static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1800{
1801 struct inet6_dev *idev;
1802
1803 ASSERT_RTNL();
1804
e21e8467
SH		 1805 idev = ipv6_find_idev(dev);
1806 if (!idev)
64e724f6
BH		 1807 return ERR_PTR(-ENOBUFS);
1808
1809 if (idev->cnf.disable_ipv6)
1810 return ERR_PTR(-EACCES);
1da177e4
LT		 1811
1812 /* Add default multicast route */
4af04aba
LW		 1813 if (!(dev->flags & IFF_LOOPBACK))
1814 addrconf_add_mroute(dev);
1da177e4
LT		 1815
1816 /* Add link local route */
1817 addrconf_add_lroute(dev);
1818 return idev;
1819}
1820
e6bff995 1821void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
1da177e4
LT		 1822{
1823 struct prefix_info *pinfo;
1824 __u32 valid_lft;
1825 __u32 prefered_lft;
1826 int addr_type;
1da177e4 1827 struct inet6_dev *in6_dev;
56d417b1 1828 struct net *net = dev_net(dev);
1da177e4
LT		 1829
1830 pinfo = (struct prefix_info *) opt;
1ab1457c 1831
1da177e4
LT		 1832 if (len < sizeof(struct prefix_info)) {
1833 ADBG(("addrconf: prefix option too short\n"));
1834 return;
1835 }
1ab1457c 1836
1da177e4
LT		 1837 /*
1838 * Validation checks ([ADDRCONF], page 19)
1839 */
1840
1841 addr_type = ipv6_addr_type(&pinfo->prefix);
1842
1843 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1844 return;
1845
1846 valid_lft = ntohl(pinfo->valid);
1847 prefered_lft = ntohl(pinfo->prefered);
1848
1849 if (prefered_lft > valid_lft) {
1850 if (net_ratelimit())
1851 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1852 return;
1853 }
1854
1855 in6_dev = in6_dev_get(dev);
1856
1857 if (in6_dev == NULL) {
1858 if (net_ratelimit())
1859 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1860 return;
1861 }
1862
1863 /*
1864 * Two things going on here:
1865 * 1) Add routes for on-link prefixes
1866 * 2) Configure prefixes with the auto flag set
1867 */
1868
4bed72e4
YH		 1869 if (pinfo->onlink) {
1870 struct rt6_info *rt;
1871 unsigned long rt_expires;
1872
6f704992
YH		 1873 /* Avoid arithmetic overflow. Really, we could
1874 * save rt_expires in seconds, likely valid_lft,
1875 * but it would require division in fib gc, that it
1876 * not good.
1877 */
4bed72e4
YH		 1878 if (HZ > USER_HZ)
1879 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1880 else
1881 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1882
4bed72e4
YH		 1883 if (addrconf_finite_timeout(rt_expires))
1884 rt_expires *= HZ;
1da177e4 1885
14ef37b6
AH		 1886 rt = addrconf_get_prefix_route(&pinfo->prefix,
1887 pinfo->prefix_len,
1888 dev,
1889 RTF_ADDRCONF | RTF_PREFIX_RT,
1890 RTF_GATEWAY | RTF_DEFAULT);
1da177e4 1891
14ef37b6 1892 if (rt) {
6f704992
YH		 1893 /* Autoconf prefix route */
1894 if (valid_lft == 0) {
1895 ip6_del_rt(rt);
1896 rt = NULL;
4bed72e4 1897 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992 1898 /* not infinity */
1716a961 1899 rt6_set_expires(rt, jiffies + rt_expires);
6f704992 1900 } else {
1716a961 1901 rt6_clean_expires(rt);
1da177e4
LT		 1902 }
1903 } else if (valid_lft) {
6f704992 1904 clock_t expires = 0;
4bed72e4
YH		 1905 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1906 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1907 /* not infinity */
1908 flags |= RTF_EXPIRES;
1909 expires = jiffies_to_clock_t(rt_expires);
1910 }
1da177e4 1911 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1912 dev, expires, flags);
1da177e4
LT		 1913 }
1914 if (rt)
d8d1f30b 1915 dst_release(&rt->dst);
1da177e4
LT		 1916 }
1917
1918 /* Try to figure out our local address for this prefix */
1919
1920 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
8e5e8f30 1921 struct inet6_ifaddr *ifp;
1da177e4
LT		 1922 struct in6_addr addr;
1923 int create = 0, update_lft = 0;
1924
1925 if (pinfo->prefix_len == 64) {
1926 memcpy(&addr, &pinfo->prefix, 8);
1927 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1928 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1929 in6_dev_put(in6_dev);
1930 return;
1931 }
1932 goto ok;
1933 }
1934 if (net_ratelimit())
1935 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1936 pinfo->prefix_len);
1937 in6_dev_put(in6_dev);
1938 return;
1939
1940ok:
1941
53b7997f 1942 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1da177e4
LT		 1943
1944 if (ifp == NULL && valid_lft) {
1945 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1946 u32 addr_flags = 0;
1947
1948#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1949 if (in6_dev->cnf.optimistic_dad &&
e6bff995 1950 !net->ipv6.devconf_all->forwarding && sllao)
95c385b4
NH		 1951 addr_flags = IFA_F_OPTIMISTIC;
1952#endif
1da177e4
LT		 1953
1954 /* Do not allow to create too much of autoconfigured
1955 * addresses; this would be too easy way to crash kernel.
1956 */
1957 if (!max_addresses ||
1958 ipv6_count_addresses(in6_dev) < max_addresses)
1959 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1960 addr_type&IPV6_ADDR_SCOPE_MASK,
1961 addr_flags);
1da177e4
LT		 1962
1963 if (!ifp || IS_ERR(ifp)) {
1964 in6_dev_put(in6_dev);
1965 return;
1966 }
1967
1968 update_lft = create = 1;
1969 ifp->cstamp = jiffies;
cf22f9a2 1970 addrconf_dad_start(ifp);
1da177e4
LT		 1971 }
1972
1973 if (ifp) {
1974 int flags;
1975 unsigned long now;
1976#ifdef CONFIG_IPV6_PRIVACY
1977 struct inet6_ifaddr *ift;
1978#endif
1979 u32 stored_lft;
1980
1981 /* update lifetime (RFC2462 5.5.3 e) */
1982 spin_lock(&ifp->lock);
1983 now = jiffies;
1984 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1985 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1986 else
1987 stored_lft = 0;
1988 if (!update_lft && stored_lft) {
1989 if (valid_lft > MIN_VALID_LIFETIME ||
1990 valid_lft > stored_lft)
1991 update_lft = 1;
1992 else if (stored_lft <= MIN_VALID_LIFETIME) {
1993 /* valid_lft <= stored_lft is always true */
a1ed0526
BH		 1994 /*
1995 * RFC 4862 Section 5.5.3e:
1996 * "Note that the preferred lifetime of
1997 * the corresponding address is always
1998 * reset to the Preferred Lifetime in
1999 * the received Prefix Information
2000 * option, regardless of whether the
2001 * valid lifetime is also reset or
2002 * ignored."
2003 *
2004 * So if the preferred lifetime in
2005 * this advertisement is different
2006 * than what we have stored, but the
2007 * valid lifetime is invalid, just
2008 * reset prefered_lft.
2009 *
2010 * We must set the valid lifetime
2011 * to the stored lifetime since we'll
2012 * be updating the timestamp below,
2013 * else we'll set it back to the
25985edc 2014 * minimum.
a1ed0526
BH		 2015 */
2016 if (prefered_lft != ifp->prefered_lft) {
2017 valid_lft = stored_lft;
2018 update_lft = 1;
2019 }
1da177e4
LT		 2020 } else {
2021 valid_lft = MIN_VALID_LIFETIME;
2022 if (valid_lft < prefered_lft)
2023 prefered_lft = valid_lft;
2024 update_lft = 1;
2025 }
2026 }
2027
2028 if (update_lft) {
2029 ifp->valid_lft = valid_lft;
2030 ifp->prefered_lft = prefered_lft;
2031 ifp->tstamp = now;
2032 flags = ifp->flags;
2033 ifp->flags &= ~IFA_F_DEPRECATED;
2034 spin_unlock(&ifp->lock);
2035
2036 if (!(flags&IFA_F_TENTATIVE))
2037 ipv6_ifa_notify(0, ifp);
2038 } else
2039 spin_unlock(&ifp->lock);
2040
2041#ifdef CONFIG_IPV6_PRIVACY
2042 read_lock_bh(&in6_dev->lock);
2043 /* update all temporary addresses in the list */
76f793e3
LC		 2044 list_for_each_entry(ift, &in6_dev->tempaddr_list,
2045 tmp_list) {
2046 int age, max_valid, max_prefered;
2047
c6fbfac2
BB		 2048 if (ifp != ift->ifpub)
2049 continue;
2050
76f793e3
LC		 2051 /*
2052 * RFC 4941 section 3.3:
2053 * If a received option will extend the lifetime
2054 * of a public address, the lifetimes of
2055 * temporary addresses should be extended,
2056 * subject to the overall constraint that no
2057 * temporary addresses should ever remain
2058 * "valid" or "preferred" for a time longer than
2059 * (TEMP_VALID_LIFETIME) or
2060 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2061 * respectively.
2062 */
2063 age = (now - ift->cstamp) / HZ;
2064 max_valid = in6_dev->cnf.temp_valid_lft - age;
2065 if (max_valid < 0)
2066 max_valid = 0;
2067
2068 max_prefered = in6_dev->cnf.temp_prefered_lft -
2069 in6_dev->cnf.max_desync_factor -
2070 age;
2071 if (max_prefered < 0)
2072 max_prefered = 0;
2073
2074 if (valid_lft > max_valid)
2075 valid_lft = max_valid;
2076
2077 if (prefered_lft > max_prefered)
2078 prefered_lft = max_prefered;
2079
1da177e4
LT		 2080 spin_lock(&ift->lock);
2081 flags = ift->flags;
76f793e3
LC		 2082 ift->valid_lft = valid_lft;
2083 ift->prefered_lft = prefered_lft;
2084 ift->tstamp = now;
2085 if (prefered_lft > 0)
2086 ift->flags &= ~IFA_F_DEPRECATED;
2087
1da177e4
LT		 2088 spin_unlock(&ift->lock);
2089 if (!(flags&IFA_F_TENTATIVE))
2090 ipv6_ifa_notify(0, ift);
2091 }
2092
aed65501 2093 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
1da177e4 2094 /*
76f793e3
LC		 2095 * When a new public address is created as
2096 * described in [ADDRCONF], also create a new
2097 * temporary address. Also create a temporary
2098 * address if it's enabled but no temporary
2099 * address currently exists.
1da177e4 2100 */
1ab1457c 2101 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 2102 ipv6_create_tempaddr(ifp, NULL);
2103 } else {
2104 read_unlock_bh(&in6_dev->lock);
2105 }
2106#endif
2107 in6_ifa_put(ifp);
2108 addrconf_verify(0);
2109 }
2110 }
2111 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2112 in6_dev_put(in6_dev);
2113}
2114
2115/*
2116 * Set destination address.
2117 * Special case for SIT interfaces where we create a new "virtual"
2118 * device.
2119 */
af284937 2120int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 2121{
2122 struct in6_ifreq ireq;
2123 struct net_device *dev;
2124 int err = -EINVAL;
2125
2126 rtnl_lock();
2127
2128 err = -EFAULT;
2129 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2130 goto err_exit;
2131
af284937 2132 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2133
2134 err = -ENODEV;
2135 if (dev == NULL)
2136 goto err_exit;
2137
0be669bb 2138#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4 2139 if (dev->type == ARPHRD_SIT) {
5bc3eb7e 2140 const struct net_device_ops *ops = dev->netdev_ops;
1da177e4 2141 struct ifreq ifr;
1da177e4
LT		 2142 struct ip_tunnel_parm p;
2143
2144 err = -EADDRNOTAVAIL;
2145 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2146 goto err_exit;
2147
2148 memset(&p, 0, sizeof(p));
2149 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2150 p.iph.saddr = 0;
2151 p.iph.version = 4;
2152 p.iph.ihl = 5;
2153 p.iph.protocol = IPPROTO_IPV6;
2154 p.iph.ttl = 64;
d20b3109 2155 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4 2156
5bc3eb7e
SH		 2157 if (ops->ndo_do_ioctl) {
2158 mm_segment_t oldfs = get_fs();
2159
2160 set_fs(KERNEL_DS);
2161 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2162 set_fs(oldfs);
2163 } else
2164 err = -EOPNOTSUPP;
1da177e4
LT		 2165
2166 if (err == 0) {
2167 err = -ENOBUFS;
af284937
DL		 2168 dev = __dev_get_by_name(net, p.name);
2169 if (!dev)
1da177e4
LT		 2170 goto err_exit;
2171 err = dev_open(dev);
2172 }
2173 }
0be669bb 2174#endif
1da177e4
LT		 2175
2176err_exit:
2177 rtnl_unlock();
2178 return err;
2179}
2180
2181/*
2182 * Manual configuration of address on an interface
2183 */
b71d1d42 2184static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
24ef0da7 2185 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2186 __u32 valid_lft)
1da177e4
LT		 2187{
2188 struct inet6_ifaddr *ifp;
2189 struct inet6_dev *idev;
2190 struct net_device *dev;
2191 int scope;
6f704992
YH		 2192 u32 flags;
2193 clock_t expires;
4bed72e4 2194 unsigned long timeout;
1da177e4
LT		 2195
2196 ASSERT_RTNL();
1ab1457c 2197
24ef0da7
TG		 2198 if (plen > 128)
2199 return -EINVAL;
2200
0778769d
NT		 2201 /* check the lifetime */
2202 if (!valid_lft || prefered_lft > valid_lft)
2203 return -EINVAL;
2204
af284937
DL		 2205 dev = __dev_get_by_index(net, ifindex);
2206 if (!dev)
1da177e4 2207 return -ENODEV;
1ab1457c 2208
64e724f6
BH		 2209 idev = addrconf_add_dev(dev);
2210 if (IS_ERR(idev))
2211 return PTR_ERR(idev);
1da177e4
LT		 2212
2213 scope = ipv6_addr_scope(pfx);
2214
4bed72e4
YH		 2215 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2216 if (addrconf_finite_timeout(timeout)) {
2217 expires = jiffies_to_clock_t(timeout * HZ);
2218 valid_lft = timeout;
6f704992 2219 flags = RTF_EXPIRES;
4bed72e4
YH		 2220 } else {
2221 expires = 0;
2222 flags = 0;
2223 ifa_flags |= IFA_F_PERMANENT;
6f704992 2224 }
0778769d 2225
4bed72e4
YH		 2226 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2227 if (addrconf_finite_timeout(timeout)) {
2228 if (timeout == 0)
2229 ifa_flags |= IFA_F_DEPRECATED;
2230 prefered_lft = timeout;
2231 }
0778769d
NT		 2232
2233 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2234
1da177e4 2235 if (!IS_ERR(ifp)) {
06aebfb7 2236 spin_lock_bh(&ifp->lock);
0778769d
NT		 2237 ifp->valid_lft = valid_lft;
2238 ifp->prefered_lft = prefered_lft;
2239 ifp->tstamp = jiffies;
06aebfb7 2240 spin_unlock_bh(&ifp->lock);
0778769d 2241
46d48046 2242 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2243 expires, flags);
95c385b4
NH		 2244 /*
2245 * Note that section 3.1 of RFC 4429 indicates
2246 * that the Optimistic flag should not be set for
2247 * manually configured addresses
2248 */
cf22f9a2 2249 addrconf_dad_start(ifp);
1da177e4 2250 in6_ifa_put(ifp);
0778769d 2251 addrconf_verify(0);
1da177e4
LT		 2252 return 0;
2253 }
2254
2255 return PTR_ERR(ifp);
2256}
2257
b71d1d42 2258static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx,
24ef0da7 2259 unsigned int plen)
1da177e4
LT		 2260{
2261 struct inet6_ifaddr *ifp;
2262 struct inet6_dev *idev;
2263 struct net_device *dev;
1ab1457c 2264
24ef0da7
TG		 2265 if (plen > 128)
2266 return -EINVAL;
2267
af284937
DL		 2268 dev = __dev_get_by_index(net, ifindex);
2269 if (!dev)
1da177e4
LT		 2270 return -ENODEV;
2271
2272 if ((idev = __in6_dev_get(dev)) == NULL)
2273 return -ENXIO;
2274
2275 read_lock_bh(&idev->lock);
502a2ffd 2276 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1da177e4
LT		 2277 if (ifp->prefix_len == plen &&
2278 ipv6_addr_equal(pfx, &ifp->addr)) {
2279 in6_ifa_hold(ifp);
2280 read_unlock_bh(&idev->lock);
1ab1457c 2281
1da177e4
LT		 2282 ipv6_del_addr(ifp);
2283
2284 /* If the last address is deleted administratively,
2285 disable IPv6 on this interface.
2286 */
502a2ffd 2287 if (list_empty(&idev->addr_list))
1da177e4
LT		 2288 addrconf_ifdown(idev->dev, 1);
2289 return 0;
2290 }
2291 }
2292 read_unlock_bh(&idev->lock);
2293 return -EADDRNOTAVAIL;
2294}
2295
2296
af284937 2297int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2298{
2299 struct in6_ifreq ireq;
2300 int err;
1ab1457c 2301
1da177e4
LT		 2302 if (!capable(CAP_NET_ADMIN))
2303 return -EPERM;
1ab1457c 2304
1da177e4
LT		 2305 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2306 return -EFAULT;
2307
2308 rtnl_lock();
af284937
DL		 2309 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2310 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2311 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2312 rtnl_unlock();
2313 return err;
2314}
2315
af284937 2316int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2317{
2318 struct in6_ifreq ireq;
2319 int err;
1ab1457c 2320
1da177e4
LT		 2321 if (!capable(CAP_NET_ADMIN))
2322 return -EPERM;
2323
2324 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2325 return -EFAULT;
2326
2327 rtnl_lock();
af284937
DL		 2328 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2329 ireq.ifr6_prefixlen);
1da177e4
LT		 2330 rtnl_unlock();
2331 return err;
2332}
2333
b5f348e5
IJ		 2334static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2335 int plen, int scope)
2336{
2337 struct inet6_ifaddr *ifp;
2338
2339 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2340 if (!IS_ERR(ifp)) {
2341 spin_lock_bh(&ifp->lock);
2342 ifp->flags &= ~IFA_F_TENTATIVE;
2343 spin_unlock_bh(&ifp->lock);
2344 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2345 in6_ifa_put(ifp);
2346 }
2347}
2348
0be669bb 2349#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2350static void sit_add_v4_addrs(struct inet6_dev *idev)
2351{
1da177e4
LT		 2352 struct in6_addr addr;
2353 struct net_device *dev;
c346dca1 2354 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2355 int scope;
2356
2357 ASSERT_RTNL();
2358
2359 memset(&addr, 0, sizeof(struct in6_addr));
2360 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2361
2362 if (idev->dev->flags&IFF_POINTOPOINT) {
2363 addr.s6_addr32[0] = htonl(0xfe800000);
2364 scope = IFA_LINK;
2365 } else {
2366 scope = IPV6_ADDR_COMPATv4;
2367 }
2368
2369 if (addr.s6_addr32[3]) {
b5f348e5 2370 add_addr(idev, &addr, 128, scope);
1da177e4
LT		 2371 return;
2372 }
2373
6fda7350 2374 for_each_netdev(net, dev) {
8e5e8f30 2375 struct in_device *in_dev = __in_dev_get_rtnl(dev);
1da177e4 2376 if (in_dev && (dev->flags & IFF_UP)) {
8e5e8f30 2377 struct in_ifaddr *ifa;
1da177e4
LT		 2378
2379 int flag = scope;
2380
2381 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2382 int plen;
2383
2384 addr.s6_addr32[3] = ifa->ifa_local;
2385
2386 if (ifa->ifa_scope == RT_SCOPE_LINK)
2387 continue;
2388 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2389 if (idev->dev->flags&IFF_POINTOPOINT)
2390 continue;
2391 flag |= IFA_HOST;
2392 }
2393 if (idev->dev->flags&IFF_POINTOPOINT)
2394 plen = 64;
2395 else
2396 plen = 96;
2397
b5f348e5 2398 add_addr(idev, &addr, plen, flag);
1da177e4
LT		 2399 }
2400 }
1ab1457c 2401 }
1da177e4 2402}
0be669bb 2403#endif
1da177e4
LT		 2404
2405static void init_loopback(struct net_device *dev)
2406{
2407 struct inet6_dev *idev;
1da177e4
LT		 2408
2409 /* ::1 */
2410
2411 ASSERT_RTNL();
2412
2413 if ((idev = ipv6_find_idev(dev)) == NULL) {
2414 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2415 return;
2416 }
2417
b5f348e5 2418 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
1da177e4
LT		 2419}
2420
b71d1d42 2421static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
1da177e4 2422{
8e5e8f30 2423 struct inet6_ifaddr *ifp;
95c385b4
NH		 2424 u32 addr_flags = IFA_F_PERMANENT;
2425
2426#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2427 if (idev->cnf.optimistic_dad &&
702beb87 2428 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
95c385b4
NH		 2429 addr_flags |= IFA_F_OPTIMISTIC;
2430#endif
1da177e4 2431
95c385b4
NH		 2432
2433 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2434 if (!IS_ERR(ifp)) {
46d48046 2435 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
cf22f9a2 2436 addrconf_dad_start(ifp);
1da177e4
LT		 2437 in6_ifa_put(ifp);
2438 }
2439}
2440
2441static void addrconf_dev_config(struct net_device *dev)
2442{
2443 struct in6_addr addr;
8e5e8f30 2444 struct inet6_dev *idev;
1da177e4
LT		 2445
2446 ASSERT_RTNL();
2447
74235a25
HX		 2448 if ((dev->type != ARPHRD_ETHER) &&
2449 (dev->type != ARPHRD_FDDI) &&
2450 (dev->type != ARPHRD_IEEE802_TR) &&
2451 (dev->type != ARPHRD_ARCNET) &&
06a4c1c5 2452 (dev->type != ARPHRD_INFINIBAND) &&
2453 (dev->type != ARPHRD_IEEE802154)) {
74235a25
HX		 2454 /* Alas, we support only Ethernet autoconfiguration. */
2455 return;
2456 }
2457
1da177e4 2458 idev = addrconf_add_dev(dev);
64e724f6 2459 if (IS_ERR(idev))
1da177e4
LT		 2460 return;
2461
2462 memset(&addr, 0, sizeof(struct in6_addr));
2463 addr.s6_addr32[0] = htonl(0xFE800000);
2464
2465 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2466 addrconf_add_linklocal(idev, &addr);
2467}
2468
0be669bb 2469#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2470static void addrconf_sit_config(struct net_device *dev)
2471{
2472 struct inet6_dev *idev;
2473
2474 ASSERT_RTNL();
2475
1ab1457c
YH		 2476 /*
2477 * Configure the tunnel with one of our IPv4
2478 * addresses... we should configure all of
1da177e4
LT		 2479 * our v4 addrs in the tunnel
2480 */
2481
2482 if ((idev = ipv6_find_idev(dev)) == NULL) {
2483 printk(KERN_DEBUG "init sit: add_dev failed\n");
2484 return;
2485 }
2486
c7dc89c0
FT		 2487 if (dev->priv_flags & IFF_ISATAP) {
2488 struct in6_addr addr;
2489
2490 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2491 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2492 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2493 addrconf_add_linklocal(idev, &addr);
2494 return;
2495 }
2496
1da177e4
LT		 2497 sit_add_v4_addrs(idev);
2498
2499 if (dev->flags&IFF_POINTOPOINT) {
2500 addrconf_add_mroute(dev);
2501 addrconf_add_lroute(dev);
2502 } else
2503 sit_route_add(dev);
2504}
0be669bb 2505#endif
1da177e4 2506
aee80b54 2507#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2508static void addrconf_gre_config(struct net_device *dev)
2509{
2510 struct inet6_dev *idev;
2511 struct in6_addr addr;
2512
2513 pr_info("ipv6: addrconf_gre_config(%s)\n", dev->name);
2514
2515 ASSERT_RTNL();
2516
2517 if ((idev = ipv6_find_idev(dev)) == NULL) {
2518 printk(KERN_DEBUG "init gre: add_dev failed\n");
2519 return;
2520 }
2521
2522 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2523 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2524
2525 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2526 addrconf_add_linklocal(idev, &addr);
2527}
2528#endif
2529
1da177e4
LT		 2530static inline int
2531ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2532{
2533 struct in6_addr lladdr;
2534
95c385b4 2535 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2536 addrconf_add_linklocal(idev, &lladdr);
2537 return 0;
2538 }
2539 return -1;
2540}
2541
2542static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2543{
2544 struct net_device *link_dev;
c346dca1 2545 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2546
2547 /* first try to inherit the link-local address from the link device */
2548 if (idev->dev->iflink &&
6fda7350 2549 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2550 if (!ipv6_inherit_linklocal(idev, link_dev))
2551 return;
2552 }
2553 /* then try to inherit it from any device */
6fda7350 2554 for_each_netdev(net, link_dev) {
1da177e4
LT		 2555 if (!ipv6_inherit_linklocal(idev, link_dev))
2556 return;
2557 }
2558 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2559}
2560
2561/*
2562 * Autoconfigure tunnel with a link-local address so routing protocols,
2563 * DHCPv6, MLD etc. can be run over the virtual link
2564 */
2565
2566static void addrconf_ip6_tnl_config(struct net_device *dev)
2567{
2568 struct inet6_dev *idev;
2569
2570 ASSERT_RTNL();
2571
e21e8467 2572 idev = addrconf_add_dev(dev);
64e724f6 2573 if (IS_ERR(idev)) {
1da177e4
LT		 2574 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2575 return;
2576 }
2577 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2578}
2579
1ab1457c 2580static int addrconf_notify(struct notifier_block *this, unsigned long event,
8e5e8f30 2581 void *data)
1da177e4
LT		 2582{
2583 struct net_device *dev = (struct net_device *) data;
74235a25 2584 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2585 int run_pending = 0;
b217d616 2586 int err;
1da177e4 2587
e21e8467 2588 switch (event) {
45ba9dd2 2589 case NETDEV_REGISTER:
74235a25 2590 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2591 idev = ipv6_add_dev(dev);
2592 if (!idev)
b217d616 2593 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2594 }
2595 break;
bcdd553f 2596
1da177e4 2597 case NETDEV_UP:
3c21edbd 2598 case NETDEV_CHANGE:
c2edacf8
JV		 2599 if (dev->flags & IFF_SLAVE)
2600 break;
2601
3c21edbd 2602 if (event == NETDEV_UP) {
f24e3d65 2603 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2604 /* device is not ready yet. */
2605 printk(KERN_INFO
2606 "ADDRCONF(NETDEV_UP): %s: "
2607 "link is not ready\n",
2608 dev->name);
2609 break;
2610 }
99081049 2611
d31c7b8f
EP		 2612 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2613 idev = ipv6_add_dev(dev);
2614
e3ec6cfc 2615 if (idev) {
99081049 2616 idev->if_flags |= IF_READY;
e3ec6cfc
BT		 2617 run_pending = 1;
2618 }
3c21edbd 2619 } else {
f24e3d65 2620 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2621 /* device is still not ready. */
2622 break;
2623 }
2624
2625 if (idev) {
bcdd553f 2626 if (idev->if_flags & IF_READY)
3c21edbd
YH		 2627 /* device is already configured. */
2628 break;
3c21edbd
YH		 2629 idev->if_flags |= IF_READY;
2630 }
2631
2632 printk(KERN_INFO
2633 "ADDRCONF(NETDEV_CHANGE): %s: "
2634 "link becomes ready\n",
2635 dev->name);
2636
c5e33bdd 2637 run_pending = 1;
3c21edbd
YH		 2638 }
2639
e21e8467 2640 switch (dev->type) {
0be669bb 2641#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2642 case ARPHRD_SIT:
2643 addrconf_sit_config(dev);
2644 break;
aee80b54 2645#endif
2646#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2647 case ARPHRD_IPGRE:
2648 addrconf_gre_config(dev);
2649 break;
0be669bb 2650#endif
1da177e4
LT		 2651 case ARPHRD_TUNNEL6:
2652 addrconf_ip6_tnl_config(dev);
2653 break;
2654 case ARPHRD_LOOPBACK:
2655 init_loopback(dev);
2656 break;
2657
2658 default:
2659 addrconf_dev_config(dev);
2660 break;
3ff50b79 2661 }
bcdd553f 2662
1da177e4 2663 if (idev) {
c5e33bdd
YH		 2664 if (run_pending)
2665 addrconf_dad_run(idev);
2666
bcdd553f
SH		 2667 /*
2668 * If the MTU changed during the interface down,
2669 * when the interface up, the changed MTU must be
2670 * reflected in the idev as well as routers.
1da177e4 2671 */
bcdd553f
SH		 2672 if (idev->cnf.mtu6 != dev->mtu &&
2673 dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2674 rt6_mtu_change(dev, dev->mtu);
2675 idev->cnf.mtu6 = dev->mtu;
2676 }
2677 idev->tstamp = jiffies;
2678 inet6_ifinfo_notify(RTM_NEWLINK, idev);
bcdd553f
SH		 2679
2680 /*
2681 * If the changed mtu during down is lower than
2682 * IPV6_MIN_MTU stop IPv6 on this interface.
1da177e4
LT		 2683 */
2684 if (dev->mtu < IPV6_MIN_MTU)
bcdd553f 2685 addrconf_ifdown(dev, 1);
1da177e4
LT		 2686 }
2687 break;
2688
2689 case NETDEV_CHANGEMTU:
d31c7b8f 2690 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2691 rt6_mtu_change(dev, dev->mtu);
2692 idev->cnf.mtu6 = dev->mtu;
2693 break;
2694 }
2695
d31c7b8f
EP		 2696 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2697 idev = ipv6_add_dev(dev);
2698 if (idev)
2699 break;
2700 }
2701
bcdd553f
SH		 2702 /*
2703 * MTU falled under IPV6_MIN_MTU.
2704 * Stop IPv6 on this interface.
2705 */
1da177e4
LT		 2706
2707 case NETDEV_DOWN:
2708 case NETDEV_UNREGISTER:
2709 /*
2710 * Remove all addresses from this interface.
2711 */
2712 addrconf_ifdown(dev, event != NETDEV_DOWN);
2713 break;
3c21edbd 2714
1da177e4 2715 case NETDEV_CHANGENAME:
1da177e4 2716 if (idev) {
5632c515 2717 snmp6_unregister_dev(idev);
408c4768 2718 addrconf_sysctl_unregister(idev);
f52295a9 2719 addrconf_sysctl_register(idev);
b217d616
HX		 2720 err = snmp6_register_dev(idev);
2721 if (err)
2722 return notifier_from_errno(err);
5632c515 2723 }
1da177e4 2724 break;
bcdd553f 2725
93d9b7d7
JP		 2726 case NETDEV_PRE_TYPE_CHANGE:
2727 case NETDEV_POST_TYPE_CHANGE:
2728 addrconf_type_change(dev, event);
75c78500 2729 break;
3ff50b79 2730 }
1da177e4
LT		 2731
2732 return NOTIFY_OK;
2733}
2734
2735/*
2736 * addrconf module should be notified of a device going up
2737 */
2738static struct notifier_block ipv6_dev_notf = {
2739 .notifier_call = addrconf_notify,
1da177e4
LT		 2740};
2741
93d9b7d7 2742static void addrconf_type_change(struct net_device *dev, unsigned long event)
75c78500
MS		 2743{
2744 struct inet6_dev *idev;
2745 ASSERT_RTNL();
2746
2747 idev = __in6_dev_get(dev);
2748
93d9b7d7 2749 if (event == NETDEV_POST_TYPE_CHANGE)
75c78500 2750 ipv6_mc_remap(idev);
93d9b7d7 2751 else if (event == NETDEV_PRE_TYPE_CHANGE)
75c78500
MS		 2752 ipv6_mc_unmap(idev);
2753}
2754
1da177e4
LT		 2755static int addrconf_ifdown(struct net_device *dev, int how)
2756{
c346dca1 2757 struct net *net = dev_net(dev);
502a2ffd 2758 struct inet6_dev *idev;
2759 struct inet6_ifaddr *ifa;
73a8bd74 2760 int state, i;
1da177e4
LT		 2761
2762 ASSERT_RTNL();
2763
73a8bd74
DM		 2764 rt6_ifdown(net, dev);
2765 neigh_ifdown(&nd_tbl, dev);
1da177e4
LT		 2766
2767 idev = __in6_dev_get(dev);
2768 if (idev == NULL)
2769 return -ENODEV;
2770
bcdd553f
SH		 2771 /*
2772 * Step 1: remove reference to ipv6 device from parent device.
2773 * Do not dev_put!
1da177e4 2774 */
439e2385 2775 if (how) {
1da177e4 2776 idev->dead = 1;
8814c4b5
YH		 2777
2778 /* protected by rtnl_lock */
a9b3cd7f 2779 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
1da177e4
LT		 2780
2781 /* Step 1.5: remove snmp6 entry */
2782 snmp6_unregister_dev(idev);
2783
2784 }
2785
73a8bd74
DM		 2786 /* Step 2: clear hash table */
2787 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
2788 struct hlist_head *h = &inet6_addr_lst[i];
2789 struct hlist_node *n;
2790
2791 spin_lock_bh(&addrconf_hash_lock);
2792 restart:
2793 hlist_for_each_entry_rcu(ifa, n, h, addr_lst) {
2794 if (ifa->idev == idev) {
2795 hlist_del_init_rcu(&ifa->addr_lst);
2796 addrconf_del_timer(ifa);
2797 goto restart;
2798 }
2799 }
2800 spin_unlock_bh(&addrconf_hash_lock);
2801 }
2802
1da177e4
LT		 2803 write_lock_bh(&idev->lock);
2804
bcdd553f 2805 /* Step 2: clear flags for stateless addrconf */
439e2385 2806 if (!how)
3c21edbd 2807 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4 2808
1da177e4 2809#ifdef CONFIG_IPV6_PRIVACY
439e2385 2810 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2811 in6_dev_put(idev);
2812
bcdd553f 2813 /* Step 3: clear tempaddr list */
372e6c8f 2814 while (!list_empty(&idev->tempaddr_list)) {
2815 ifa = list_first_entry(&idev->tempaddr_list,
2816 struct inet6_ifaddr, tmp_list);
2817 list_del(&ifa->tmp_list);
1da177e4
LT		 2818 write_unlock_bh(&idev->lock);
2819 spin_lock_bh(&ifa->lock);
2820
2821 if (ifa->ifpub) {
2822 in6_ifa_put(ifa->ifpub);
2823 ifa->ifpub = NULL;
2824 }
2825 spin_unlock_bh(&ifa->lock);
2826 in6_ifa_put(ifa);
2827 write_lock_bh(&idev->lock);
2828 }
2829#endif
8f37ada5 2830
502a2ffd 2831 while (!list_empty(&idev->addr_list)) {
2832 ifa = list_first_entry(&idev->addr_list,
2833 struct inet6_ifaddr, if_list);
84e8b803 2834 addrconf_del_timer(ifa);
2835
73a8bd74 2836 list_del(&ifa->if_list);
84e8b803 2837
73a8bd74 2838 write_unlock_bh(&idev->lock);
84e8b803 2839
73a8bd74
DM		 2840 spin_lock_bh(&ifa->state_lock);
2841 state = ifa->state;
2842 ifa->state = INET6_IFADDR_STATE_DEAD;
2843 spin_unlock_bh(&ifa->state_lock);
9d82ca98 2844
73a8bd74
DM		 2845 if (state != INET6_IFADDR_STATE_DEAD) {
2846 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2847 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
27bdb2ab 2848 }
73a8bd74 2849 in6_ifa_put(ifa);
8f37ada5 2850
73a8bd74
DM		 2851 write_lock_bh(&idev->lock);
2852 }
8f37ada5 2853
1da177e4
LT		 2854 write_unlock_bh(&idev->lock);
2855
2856 /* Step 5: Discard multicast list */
439e2385 2857 if (how)
1da177e4
LT		 2858 ipv6_mc_destroy_dev(idev);
2859 else
2860 ipv6_mc_down(idev);
2861
1da177e4 2862 idev->tstamp = jiffies;
1ab1457c 2863
bcdd553f 2864 /* Last: Shot the device (if unregistered) */
439e2385 2865 if (how) {
408c4768 2866 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2867 neigh_parms_release(&nd_tbl, idev->nd_parms);
2868 neigh_ifdown(&nd_tbl, dev);
2869 in6_dev_put(idev);
2870 }
2871 return 0;
2872}
2873
2874static void addrconf_rs_timer(unsigned long data)
2875{
2876 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
5b2a1953 2877 struct inet6_dev *idev = ifp->idev;
1da177e4 2878
5b2a1953 2879 read_lock(&idev->lock);
2880 if (idev->dead || !(idev->if_flags & IF_READY))
1da177e4
LT		 2881 goto out;
2882
5b2a1953 2883 if (idev->cnf.forwarding)
2884 goto out;
2885
2886 /* Announcement received after solicitation was sent */
2887 if (idev->if_flags & IF_RA_RCVD)
1da177e4 2888 goto out;
1da177e4
LT		 2889
2890 spin_lock(&ifp->lock);
5b2a1953 2891 if (ifp->probes++ < idev->cnf.rtr_solicits) {
1da177e4
LT		 2892 /* The wait after the last probe can be shorter */
2893 addrconf_mod_timer(ifp, AC_RS,
5b2a1953 2894 (ifp->probes == idev->cnf.rtr_solicits) ?
2895 idev->cnf.rtr_solicit_delay :
2896 idev->cnf.rtr_solicit_interval);
1da177e4
LT		 2897 spin_unlock(&ifp->lock);
2898
5b2a1953 2899 ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2900 } else {
2901 spin_unlock(&ifp->lock);
2902 /*
2903 * Note: we do not support deprecated "all on-link"
2904 * assumption any longer.
2905 */
2906 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
5b2a1953 2907 idev->dev->name);
1da177e4
LT		 2908 }
2909
2910out:
5b2a1953 2911 read_unlock(&idev->lock);
1da177e4
LT		 2912 in6_ifa_put(ifp);
2913}
2914
2915/*
2916 * Duplicate Address Detection
2917 */
3c21edbd
YH		 2918static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2919{
2920 unsigned long rand_num;
2921 struct inet6_dev *idev = ifp->idev;
2922
95c385b4
NH		 2923 if (ifp->flags & IFA_F_OPTIMISTIC)
2924 rand_num = 0;
2925 else
2926 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2927
3c21edbd
YH		 2928 ifp->probes = idev->cnf.dad_transmits;
2929 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2930}
2931
cf22f9a2 2932static void addrconf_dad_start(struct inet6_ifaddr *ifp)
1da177e4
LT		 2933{
2934 struct inet6_dev *idev = ifp->idev;
2935 struct net_device *dev = idev->dev;
1da177e4
LT		 2936
2937 addrconf_join_solict(dev, &ifp->addr);
2938
1da177e4 2939 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2940
2941 read_lock_bh(&idev->lock);
622ccdf1 2942 spin_lock(&ifp->lock);
e9d3e084 2943 if (ifp->state == INET6_IFADDR_STATE_DEAD)
1da177e4 2944 goto out;
1da177e4
LT		 2945
2946 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2947 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2948 !(ifp->flags&IFA_F_TENTATIVE) ||
2949 ifp->flags & IFA_F_NODAD) {
cc411d0b 2950 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2951 spin_unlock(&ifp->lock);
1da177e4
LT		 2952 read_unlock_bh(&idev->lock);
2953
2954 addrconf_dad_completed(ifp);
2955 return;
2956 }
2957
6732bade 2958 if (!(idev->if_flags & IF_READY)) {
21809faf 2959 spin_unlock(&ifp->lock);
6732bade 2960 read_unlock_bh(&idev->lock);
3c21edbd 2961 /*
590a9887 2962 * If the device is not ready:
3c21edbd
YH		 2963 * - keep it tentative if it is a permanent address.
2964 * - otherwise, kill it.
2965 */
2966 in6_ifa_hold(ifp);
cc411d0b 2967 addrconf_dad_stop(ifp, 0);
6732bade 2968 return;
3c21edbd 2969 }
95c385b4
NH		 2970
2971 /*
2972 * Optimistic nodes can start receiving
2973 * Frames right away
2974 */
e21e8467 2975 if (ifp->flags & IFA_F_OPTIMISTIC)
95c385b4
NH		 2976 ip6_ins_rt(ifp->rt);
2977
6732bade 2978 addrconf_dad_kick(ifp);
1da177e4 2979out:
622ccdf1 2980 spin_unlock(&ifp->lock);
1da177e4
LT		 2981 read_unlock_bh(&idev->lock);
2982}
2983
2984static void addrconf_dad_timer(unsigned long data)
2985{
2986 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2987 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2988 struct in6_addr mcaddr;
2989
f2344a13
HX		 2990 if (!ifp->probes && addrconf_dad_end(ifp))
2991 goto out;
2992
122e4519 2993 read_lock(&idev->lock);
2994 if (idev->dead || !(idev->if_flags & IF_READY)) {
2995 read_unlock(&idev->lock);
1da177e4
LT		 2996 goto out;
2997 }
21809faf 2998
2999 spin_lock(&ifp->lock);
622ccdf1
HX		 3000 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3001 spin_unlock(&ifp->lock);
3002 read_unlock(&idev->lock);
3003 goto out;
3004 }
3005
1da177e4
LT		 3006 if (ifp->probes == 0) {
3007 /*
3008 * DAD was successful
3009 */
3010
cc411d0b 3011 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 3012 spin_unlock(&ifp->lock);
122e4519 3013 read_unlock(&idev->lock);
1da177e4
LT		 3014
3015 addrconf_dad_completed(ifp);
3016
3017 goto out;
3018 }
3019
3020 ifp->probes--;
3021 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
21809faf 3022 spin_unlock(&ifp->lock);
122e4519 3023 read_unlock(&idev->lock);
1da177e4
LT		 3024
3025 /* send a neighbour solicitation for our addr */
1da177e4 3026 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 3027 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 3028out:
3029 in6_ifa_put(ifp);
3030}
3031
3032static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3033{
e21e8467 3034 struct net_device *dev = ifp->idev->dev;
1da177e4
LT		 3035
3036 /*
3037 * Configure the address for reception. Now it is valid.
3038 */
3039
3040 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3041
026359bc
TA		 3042 /* If added prefix is link local and we are prepared to process
3043 router advertisements, start sending router solicitations.
1da177e4
LT		 3044 */
3045
026359bc
TA		 3046 if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) ||
3047 ifp->idev->cnf.accept_ra == 2) &&
1da177e4
LT		 3048 ifp->idev->cnf.rtr_solicits > 0 &&
3049 (dev->flags&IFF_LOOPBACK) == 0 &&
3050 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 3051 /*
3052 * If a host as already performed a random delay
3053 * [...] as part of DAD [...] there is no need
3054 * to delay again before sending the first RS
3055 */
f3ee4010 3056 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 3057
3058 spin_lock_bh(&ifp->lock);
3059 ifp->probes = 1;
3060 ifp->idev->if_flags |= IF_RS_SENT;
3061 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
3062 spin_unlock_bh(&ifp->lock);
3063 }
3064}
3065
e21e8467
SH		 3066static void addrconf_dad_run(struct inet6_dev *idev)
3067{
c5e33bdd
YH		 3068 struct inet6_ifaddr *ifp;
3069
3070 read_lock_bh(&idev->lock);
502a2ffd 3071 list_for_each_entry(ifp, &idev->addr_list, if_list) {
21809faf 3072 spin_lock(&ifp->lock);
f2344a13
HX		 3073 if (ifp->flags & IFA_F_TENTATIVE &&
3074 ifp->state == INET6_IFADDR_STATE_DAD)
3075 addrconf_dad_kick(ifp);
21809faf 3076 spin_unlock(&ifp->lock);
c5e33bdd
YH		 3077 }
3078 read_unlock_bh(&idev->lock);
3079}
3080
1da177e4
LT		 3081#ifdef CONFIG_PROC_FS
3082struct if6_iter_state {
3c40090a 3083 struct seq_net_private p;
1da177e4 3084 int bucket;
1d578303 3085 int offset;
1da177e4
LT		 3086};
3087
1d578303 3088static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
1da177e4
LT		 3089{
3090 struct inet6_ifaddr *ifa = NULL;
3091 struct if6_iter_state *state = seq->private;
1218854a 3092 struct net *net = seq_file_net(seq);
1d578303 3093 int p = 0;
1da177e4 3094
1d578303
MM		 3095 /* initial bucket if pos is 0 */
3096 if (pos == 0) {
3097 state->bucket = 0;
3098 state->offset = 0;
3099 }
3100
3101 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
c2e21293 3102 struct hlist_node *n;
4f70ecca 3103 hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket],
1d578303
MM		 3104 addr_lst) {
3105 /* sync with offset */
3106 if (p < state->offset) {
3107 p++;
3108 continue;
3109 }
3110 state->offset++;
c2e21293 3111 if (net_eq(dev_net(ifa->idev->dev), net))
3112 return ifa;
1d578303
MM		 3113 }
3114
3115 /* prepare for next bucket */
3116 state->offset = 0;
3117 p = 0;
1da177e4 3118 }
c2e21293 3119 return NULL;
1da177e4
LT		 3120}
3121
c2e21293 3122static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3123 struct inet6_ifaddr *ifa)
1da177e4
LT		 3124{
3125 struct if6_iter_state *state = seq->private;
1218854a 3126 struct net *net = seq_file_net(seq);
c2e21293 3127 struct hlist_node *n = &ifa->addr_lst;
1da177e4 3128
1d578303
MM		 3129 hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) {
3130 state->offset++;
c2e21293 3131 if (net_eq(dev_net(ifa->idev->dev), net))
3132 return ifa;
1d578303 3133 }
3c40090a 3134
c2e21293 3135 while (++state->bucket < IN6_ADDR_HSIZE) {
1d578303 3136 state->offset = 0;
4f70ecca 3137 hlist_for_each_entry_rcu_bh(ifa, n,
c2e21293 3138 &inet6_addr_lst[state->bucket], addr_lst) {
1d578303 3139 state->offset++;
c2e21293 3140 if (net_eq(dev_net(ifa->idev->dev), net))
3141 return ifa;
3142 }
1da177e4 3143 }
3c40090a 3144
c2e21293 3145 return NULL;
1da177e4
LT		 3146}
3147
1da177e4 3148static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
4f70ecca 3149 __acquires(rcu_bh)
1da177e4 3150{
5c578aed 3151 rcu_read_lock_bh();
1d578303 3152 return if6_get_first(seq, *pos);
1da177e4
LT		 3153}
3154
3155static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3156{
3157 struct inet6_ifaddr *ifa;
3158
3159 ifa = if6_get_next(seq, v);
3160 ++*pos;
3161 return ifa;
3162}
3163
3164static void if6_seq_stop(struct seq_file *seq, void *v)
4f70ecca 3165 __releases(rcu_bh)
1da177e4 3166{
5c578aed 3167 rcu_read_unlock_bh();
1da177e4
LT		 3168}
3169
3170static int if6_seq_show(struct seq_file *seq, void *v)
3171{
3172 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
4b7a4274 3173 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
b071195d 3174 &ifp->addr,
1da177e4
LT		 3175 ifp->idev->dev->ifindex,
3176 ifp->prefix_len,
3177 ifp->scope,
3178 ifp->flags,
3179 ifp->idev->dev->name);
3180 return 0;
3181}
3182
56b3d975 3183static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 3184 .start = if6_seq_start,
3185 .next = if6_seq_next,
3186 .show = if6_seq_show,
3187 .stop = if6_seq_stop,
3188};
3189
3190static int if6_seq_open(struct inode *inode, struct file *file)
3191{
3c40090a
DL		 3192 return seq_open_net(inode, file, &if6_seq_ops,
3193 sizeof(struct if6_iter_state));
1da177e4
LT		 3194}
3195
9a32144e 3196static const struct file_operations if6_fops = {
1da177e4
LT		 3197 .owner = THIS_MODULE,
3198 .open = if6_seq_open,
3199 .read = seq_read,
3200 .llseek = seq_lseek,
3c40090a 3201 .release = seq_release_net,
1da177e4
LT		 3202};
3203
2c8c1e72 3204static int __net_init if6_proc_net_init(struct net *net)
1da177e4 3205{
3c40090a 3206 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 3207 return -ENOMEM;
3208 return 0;
3209}
3210
2c8c1e72 3211static void __net_exit if6_proc_net_exit(struct net *net)
3c40090a
DL		 3212{
3213 proc_net_remove(net, "if_inet6");
3214}
3215
3216static struct pernet_operations if6_proc_net_ops = {
3217 .init = if6_proc_net_init,
3218 .exit = if6_proc_net_exit,
3219};
3220
3221int __init if6_proc_init(void)
3222{
3223 return register_pernet_subsys(&if6_proc_net_ops);
3224}
3225
1da177e4
LT		 3226void if6_proc_exit(void)
3227{
3c40090a 3228 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3229}
3230#endif /* CONFIG_PROC_FS */
3231
59fbb3a6 3232#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3233/* Check if address is a home address configured on any interface. */
b71d1d42 3234int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
3b9f9a1c
NT		 3235{
3236 int ret = 0;
c2e21293 3237 struct inet6_ifaddr *ifp = NULL;
3238 struct hlist_node *n;
3a88a81d 3239 unsigned int hash = ipv6_addr_hash(addr);
c2e21293 3240
5c578aed 3241 rcu_read_lock_bh();
4f70ecca 3242 hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) {
878628fb 3243 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3244 continue;
caad295f 3245 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3246 (ifp->flags & IFA_F_HOMEADDRESS)) {
3247 ret = 1;
3248 break;
3249 }
3250 }
5c578aed 3251 rcu_read_unlock_bh();
3b9f9a1c
NT		 3252 return ret;
3253}
3254#endif
3255
1da177e4
LT		 3256/*
3257 * Periodic address status verification
3258 */
3259
3260static void addrconf_verify(unsigned long foo)
3261{
b2db7564 3262 unsigned long now, next, next_sec, next_sched;
1da177e4 3263 struct inet6_ifaddr *ifp;
c2e21293 3264 struct hlist_node *node;
1da177e4
LT		 3265 int i;
3266
5c578aed 3267 rcu_read_lock_bh();
3268 spin_lock(&addrconf_verify_lock);
1da177e4 3269 now = jiffies;
b2db7564 3270 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
1da177e4
LT		 3271
3272 del_timer(&addr_chk_timer);
3273
bcdd553f 3274 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
1da177e4 3275restart:
4f70ecca 3276 hlist_for_each_entry_rcu_bh(ifp, node,
5c578aed 3277 &inet6_addr_lst[i], addr_lst) {
1da177e4 3278 unsigned long age;
1da177e4
LT		 3279
3280 if (ifp->flags & IFA_F_PERMANENT)
3281 continue;
3282
3283 spin_lock(&ifp->lock);
b2db7564
YH		 3284 /* We try to batch several events at once. */
3285 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
1da177e4 3286
8f27ebb9
YH		 3287 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3288 age >= ifp->valid_lft) {
1da177e4
LT		 3289 spin_unlock(&ifp->lock);
3290 in6_ifa_hold(ifp);
1da177e4
LT		 3291 ipv6_del_addr(ifp);
3292 goto restart;
8f27ebb9
YH		 3293 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3294 spin_unlock(&ifp->lock);
3295 continue;
1da177e4 3296 } else if (age >= ifp->prefered_lft) {
a1ed0526 3297 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
1da177e4
LT		 3298 int deprecate = 0;
3299
3300 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3301 deprecate = 1;
3302 ifp->flags |= IFA_F_DEPRECATED;
3303 }
3304
3305 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3306 next = ifp->tstamp + ifp->valid_lft * HZ;
3307
3308 spin_unlock(&ifp->lock);
3309
3310 if (deprecate) {
3311 in6_ifa_hold(ifp);
1da177e4
LT		 3312
3313 ipv6_ifa_notify(0, ifp);
3314 in6_ifa_put(ifp);
3315 goto restart;
3316 }
3317#ifdef CONFIG_IPV6_PRIVACY
3318 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3319 !(ifp->flags&IFA_F_TENTATIVE)) {
88949cf4 3320 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3321 ifp->idev->cnf.dad_transmits *
3322 ifp->idev->nd_parms->retrans_time / HZ;
3323
1da177e4
LT		 3324 if (age >= ifp->prefered_lft - regen_advance) {
3325 struct inet6_ifaddr *ifpub = ifp->ifpub;
3326 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3327 next = ifp->tstamp + ifp->prefered_lft * HZ;
3328 if (!ifp->regen_count && ifpub) {
3329 ifp->regen_count++;
3330 in6_ifa_hold(ifp);
3331 in6_ifa_hold(ifpub);
3332 spin_unlock(&ifp->lock);
5c578aed 3333
291d809b
HY		 3334 spin_lock(&ifpub->lock);
3335 ifpub->regen_count = 0;
3336 spin_unlock(&ifpub->lock);
1da177e4
LT		 3337 ipv6_create_tempaddr(ifpub, ifp);
3338 in6_ifa_put(ifpub);
3339 in6_ifa_put(ifp);
3340 goto restart;
3341 }
3342 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3343 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3344 spin_unlock(&ifp->lock);
3345#endif
3346 } else {
3347 /* ifp->prefered_lft <= ifp->valid_lft */
3348 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3349 next = ifp->tstamp + ifp->prefered_lft * HZ;
3350 spin_unlock(&ifp->lock);
3351 }
3352 }
1da177e4
LT		 3353 }
3354
b2db7564
YH		 3355 next_sec = round_jiffies_up(next);
3356 next_sched = next;
3357
3358 /* If rounded timeout is accurate enough, accept it. */
3359 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3360 next_sched = next_sec;
3361
3362 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3363 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3364 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3365
3366 ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3367 now, next, next_sec, next_sched));
3368
3369 addr_chk_timer.expires = next_sched;
1da177e4 3370 add_timer(&addr_chk_timer);
5c578aed 3371 spin_unlock(&addrconf_verify_lock);
3372 rcu_read_unlock_bh();
1da177e4
LT		 3373}
3374
461d8837
TG		 3375static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3376{
3377 struct in6_addr *pfx = NULL;
3378
3379 if (addr)
3380 pfx = nla_data(addr);
3381
3382 if (local) {
3383 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3384 pfx = NULL;
3385 else
3386 pfx = nla_data(local);
3387 }
3388
3389 return pfx;
3390}
3391
ef7c79ed 3392static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3393 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3394 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3395 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3396};
3397
1da177e4
LT		 3398static int
3399inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3400{
3b1e0a65 3401 struct net *net = sock_net(skb->sk);
b933f716
TG		 3402 struct ifaddrmsg *ifm;
3403 struct nlattr *tb[IFA_MAX+1];
1da177e4 3404 struct in6_addr *pfx;
b933f716 3405 int err;
1da177e4 3406
b933f716
TG		 3407 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3408 if (err < 0)
3409 return err;
3410
3411 ifm = nlmsg_data(nlh);
3412 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3413 if (pfx == NULL)
3414 return -EINVAL;
3415
af284937 3416 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3417}
3418
55ebaef1
NT		 3419static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3420 u32 prefered_lft, u32 valid_lft)
081bba5b 3421{
6f704992
YH		 3422 u32 flags;
3423 clock_t expires;
4bed72e4 3424 unsigned long timeout;
46d48046 3425
081bba5b
NT		 3426 if (!valid_lft || (prefered_lft > valid_lft))
3427 return -EINVAL;
3428
4bed72e4
YH		 3429 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3430 if (addrconf_finite_timeout(timeout)) {
3431 expires = jiffies_to_clock_t(timeout * HZ);
3432 valid_lft = timeout;
6f704992 3433 flags = RTF_EXPIRES;
4bed72e4
YH		 3434 } else {
3435 expires = 0;
3436 flags = 0;
3437 ifa_flags |= IFA_F_PERMANENT;
6f704992 3438 }
081bba5b 3439
4bed72e4
YH		 3440 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3441 if (addrconf_finite_timeout(timeout)) {
3442 if (timeout == 0)
3443 ifa_flags |= IFA_F_DEPRECATED;
3444 prefered_lft = timeout;
3445 }
081bba5b
NT		 3446
3447 spin_lock_bh(&ifp->lock);
3b9f9a1c 3448 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3449 ifp->tstamp = jiffies;
3450 ifp->valid_lft = valid_lft;
3451 ifp->prefered_lft = prefered_lft;
3452
3453 spin_unlock_bh(&ifp->lock);
3454 if (!(ifp->flags&IFA_F_TENTATIVE))
3455 ipv6_ifa_notify(0, ifp);
081bba5b 3456
46d48046 3457 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3458 expires, flags);
081bba5b
NT		 3459 addrconf_verify(0);
3460
3461 return 0;
3462}
3463
1da177e4
LT		 3464static int
3465inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3466{
3b1e0a65 3467 struct net *net = sock_net(skb->sk);
461d8837
TG		 3468 struct ifaddrmsg *ifm;
3469 struct nlattr *tb[IFA_MAX+1];
1da177e4 3470 struct in6_addr *pfx;
7198f8ce
TG		 3471 struct inet6_ifaddr *ifa;
3472 struct net_device *dev;
55ebaef1
NT		 3473 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3474 u8 ifa_flags;
461d8837 3475 int err;
1da177e4 3476
461d8837
TG		 3477 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3478 if (err < 0)
3479 return err;
3480
3481 ifm = nlmsg_data(nlh);
3482 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3483 if (pfx == NULL)
3484 return -EINVAL;
3485
461d8837 3486 if (tb[IFA_CACHEINFO]) {
0778769d 3487 struct ifa_cacheinfo *ci;
461d8837
TG		 3488
3489 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3490 valid_lft = ci->ifa_valid;
461d8837
TG		 3491 preferred_lft = ci->ifa_prefered;
3492 } else {
3493 preferred_lft = INFINITY_LIFE_TIME;
3494 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3495 }
3496
af284937 3497 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3498 if (dev == NULL)
3499 return -ENODEV;
3500
55ebaef1 3501 /* We ignore other flags so far. */
3b9f9a1c 3502 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3503
1cab3da6 3504 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3505 if (ifa == NULL) {
3506 /*
3507 * It would be best to check for !NLM_F_CREATE here but
3508 * userspace alreay relies on not having to provide this.
3509 */
af284937
DL		 3510 return inet6_addr_add(net, ifm->ifa_index, pfx,
3511 ifm->ifa_prefixlen, ifa_flags,
3512 preferred_lft, valid_lft);
081bba5b
NT		 3513 }
3514
7198f8ce
TG		 3515 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3516 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3517 err = -EEXIST;
3518 else
55ebaef1 3519 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3520
3521 in6_ifa_put(ifa);
3522
3523 return err;
1da177e4
LT		 3524}
3525
101bb229
TG		 3526static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3527 u8 scope, int ifindex)
3528{
3529 struct ifaddrmsg *ifm;
3530
3531 ifm = nlmsg_data(nlh);
3532 ifm->ifa_family = AF_INET6;
3533 ifm->ifa_prefixlen = prefixlen;
3534 ifm->ifa_flags = flags;
3535 ifm->ifa_scope = scope;
3536 ifm->ifa_index = ifindex;
3537}
3538
85486af0
TG		 3539static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3540 unsigned long tstamp, u32 preferred, u32 valid)
3541{
3542 struct ifa_cacheinfo ci;
3543
18a31e1e
TG		 3544 ci.cstamp = cstamp_delta(cstamp);
3545 ci.tstamp = cstamp_delta(tstamp);
85486af0
TG		 3546 ci.ifa_prefered = preferred;
3547 ci.ifa_valid = valid;
3548
3549 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3550}
3551
101bb229
TG		 3552static inline int rt_scope(int ifa_scope)
3553{
3554 if (ifa_scope & IFA_HOST)
3555 return RT_SCOPE_HOST;
3556 else if (ifa_scope & IFA_LINK)
3557 return RT_SCOPE_LINK;
3558 else if (ifa_scope & IFA_SITE)
3559 return RT_SCOPE_SITE;
3560 else
3561 return RT_SCOPE_UNIVERSE;
3562}
3563
0ab6803b
TG		 3564static inline int inet6_ifaddr_msgsize(void)
3565{
339bf98f
TG		 3566 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3567 + nla_total_size(16) /* IFA_ADDRESS */
3568 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3569}
c5396a31 3570
1da177e4 3571static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3572 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3573{
1da177e4 3574 struct nlmsghdr *nlh;
85486af0 3575 u32 preferred, valid;
1da177e4 3576
0ab6803b
TG		 3577 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3578 if (nlh == NULL)
26932566 3579 return -EMSGSIZE;
0ab6803b 3580
101bb229
TG		 3581 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3582 ifa->idev->dev->ifindex);
3583
1da177e4 3584 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3585 preferred = ifa->prefered_lft;
3586 valid = ifa->valid_lft;
3587 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3588 long tval = (jiffies - ifa->tstamp)/HZ;
a1faa698
JR		 3589 if (preferred > tval)
3590 preferred -= tval;
3591 else
3592 preferred = 0;
f56619fc
BH		 3593 if (valid != INFINITY_LIFE_TIME) {
3594 if (valid > tval)
3595 valid -= tval;
3596 else
3597 valid = 0;
3598 }
1da177e4
LT		 3599 }
3600 } else {
85486af0
TG		 3601 preferred = INFINITY_LIFE_TIME;
3602 valid = INFINITY_LIFE_TIME;
3603 }
3604
0ab6803b 3605 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3606 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3607 nlmsg_cancel(skb, nlh);
3608 return -EMSGSIZE;
3609 }
1da177e4 3610
0ab6803b 3611 return nlmsg_end(skb, nlh);
1da177e4
LT		 3612}
3613
3614static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3615 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3616{
1da177e4 3617 struct nlmsghdr *nlh;
101bb229
TG		 3618 u8 scope = RT_SCOPE_UNIVERSE;
3619 int ifindex = ifmca->idev->dev->ifindex;
3620
3621 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3622 scope = RT_SCOPE_SITE;
1da177e4 3623
0ab6803b
TG		 3624 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3625 if (nlh == NULL)
26932566 3626 return -EMSGSIZE;
85486af0 3627
0ab6803b
TG		 3628 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3629 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3630 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3631 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3632 nlmsg_cancel(skb, nlh);
3633 return -EMSGSIZE;
3634 }
85486af0 3635
0ab6803b 3636 return nlmsg_end(skb, nlh);
1da177e4
LT		 3637}
3638
3639static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3640 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3641{
1da177e4 3642 struct nlmsghdr *nlh;
101bb229
TG		 3643 u8 scope = RT_SCOPE_UNIVERSE;
3644 int ifindex = ifaca->aca_idev->dev->ifindex;
3645
3646 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3647 scope = RT_SCOPE_SITE;
1da177e4 3648
0ab6803b
TG		 3649 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3650 if (nlh == NULL)
26932566 3651 return -EMSGSIZE;
85486af0 3652
0ab6803b
TG		 3653 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3654 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3655 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3656 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3657 nlmsg_cancel(skb, nlh);
3658 return -EMSGSIZE;
3659 }
1da177e4 3660
0ab6803b 3661 return nlmsg_end(skb, nlh);
1da177e4
LT		 3662}
3663
e21e8467 3664enum addr_type_t {
1da177e4
LT		 3665 UNICAST_ADDR,
3666 MULTICAST_ADDR,
3667 ANYCAST_ADDR,
3668};
3669
234b27c3
ED		 3670/* called with rcu_read_lock() */
3671static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3672 struct netlink_callback *cb, enum addr_type_t type,
3673 int s_ip_idx, int *p_ip_idx)
3674{
234b27c3
ED		 3675 struct ifmcaddr6 *ifmca;
3676 struct ifacaddr6 *ifaca;
3677 int err = 1;
3678 int ip_idx = *p_ip_idx;
3679
3680 read_lock_bh(&idev->lock);
3681 switch (type) {
502a2ffd 3682 case UNICAST_ADDR: {
3683 struct inet6_ifaddr *ifa;
3684
234b27c3 3685 /* unicast address incl. temp addr */
502a2ffd 3686 list_for_each_entry(ifa, &idev->addr_list, if_list) {
3687 if (++ip_idx < s_ip_idx)
234b27c3
ED		 3688 continue;
3689 err = inet6_fill_ifaddr(skb, ifa,
3690 NETLINK_CB(cb->skb).pid,
3691 cb->nlh->nlmsg_seq,
3692 RTM_NEWADDR,
3693 NLM_F_MULTI);
3694 if (err <= 0)
3695 break;
3696 }
3697 break;
502a2ffd 3698 }
234b27c3
ED		 3699 case MULTICAST_ADDR:
3700 /* multicast address */
3701 for (ifmca = idev->mc_list; ifmca;
3702 ifmca = ifmca->next, ip_idx++) {
3703 if (ip_idx < s_ip_idx)
3704 continue;
3705 err = inet6_fill_ifmcaddr(skb, ifmca,
3706 NETLINK_CB(cb->skb).pid,
3707 cb->nlh->nlmsg_seq,
3708 RTM_GETMULTICAST,
3709 NLM_F_MULTI);
3710 if (err <= 0)
3711 break;
3712 }
3713 break;
3714 case ANYCAST_ADDR:
3715 /* anycast address */
3716 for (ifaca = idev->ac_list; ifaca;
3717 ifaca = ifaca->aca_next, ip_idx++) {
3718 if (ip_idx < s_ip_idx)
3719 continue;
3720 err = inet6_fill_ifacaddr(skb, ifaca,
3721 NETLINK_CB(cb->skb).pid,
3722 cb->nlh->nlmsg_seq,
3723 RTM_GETANYCAST,
3724 NLM_F_MULTI);
3725 if (err <= 0)
3726 break;
3727 }
3728 break;
3729 default:
3730 break;
3731 }
3732 read_unlock_bh(&idev->lock);
3733 *p_ip_idx = ip_idx;
3734 return err;
3735}
3736
1da177e4
LT		 3737static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3738 enum addr_type_t type)
3739{
234b27c3
ED		 3740 struct net *net = sock_net(skb->sk);
3741 int h, s_h;
1da177e4
LT		 3742 int idx, ip_idx;
3743 int s_idx, s_ip_idx;
1da177e4 3744 struct net_device *dev;
234b27c3
ED		 3745 struct inet6_dev *idev;
3746 struct hlist_head *head;
3747 struct hlist_node *node;
1ab1457c 3748
234b27c3
ED		 3749 s_h = cb->args[0];
3750 s_idx = idx = cb->args[1];
3751 s_ip_idx = ip_idx = cb->args[2];
5d5619b4 3752
234b27c3
ED		 3753 rcu_read_lock();
3754 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3755 idx = 0;
3756 head = &net->dev_index_head[h];
3757 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3758 if (idx < s_idx)
3759 goto cont;
4b97efdf 3760 if (h > s_h || idx > s_idx)
234b27c3
ED		 3761 s_ip_idx = 0;
3762 ip_idx = 0;
e21e8467
SH		 3763 idev = __in6_dev_get(dev);
3764 if (!idev)
234b27c3
ED		 3765 goto cont;
3766
3767 if (in6_dump_addrs(idev, skb, cb, type,
3768 s_ip_idx, &ip_idx) <= 0)
3769 goto done;
7562f876 3770cont:
234b27c3
ED		 3771 idx++;
3772 }
1da177e4 3773 }
234b27c3
ED		 3774done:
3775 rcu_read_unlock();
3776 cb->args[0] = h;
3777 cb->args[1] = idx;
3778 cb->args[2] = ip_idx;
3779
1da177e4
LT		 3780 return skb->len;
3781}
3782
3783static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3784{
3785 enum addr_type_t type = UNICAST_ADDR;
b854272b 3786
1da177e4
LT		 3787 return inet6_dump_addr(skb, cb, type);
3788}
3789
3790static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3791{
3792 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3793
1da177e4
LT		 3794 return inet6_dump_addr(skb, cb, type);
3795}
3796
3797
3798static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3799{
3800 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3801
1da177e4
LT		 3802 return inet6_dump_addr(skb, cb, type);
3803}
3804
8e5e8f30 3805static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
1b29fc2c 3806 void *arg)
6c223828 3807{
3b1e0a65 3808 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3809 struct ifaddrmsg *ifm;
3810 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3811 struct in6_addr *addr = NULL;
3812 struct net_device *dev = NULL;
3813 struct inet6_ifaddr *ifa;
3814 struct sk_buff *skb;
6c223828
NT		 3815 int err;
3816
1b29fc2c
TG		 3817 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3818 if (err < 0)
3819 goto errout;
3820
3821 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3822 if (addr == NULL) {
3823 err = -EINVAL;
3824 goto errout;
6c223828 3825 }
6c223828 3826
1b29fc2c 3827 ifm = nlmsg_data(nlh);
6c223828 3828 if (ifm->ifa_index)
6fda7350 3829 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3830
e21e8467
SH		 3831 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
3832 if (!ifa) {
1b29fc2c
TG		 3833 err = -EADDRNOTAVAIL;
3834 goto errout;
3835 }
6c223828 3836
e21e8467
SH		 3837 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
3838 if (!skb) {
6c223828 3839 err = -ENOBUFS;
1b29fc2c 3840 goto errout_ifa;
6c223828
NT		 3841 }
3842
6c223828
NT		 3843 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3844 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3845 if (err < 0) {
3846 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3847 WARN_ON(err == -EMSGSIZE);
3848 kfree_skb(skb);
3849 goto errout_ifa;
3850 }
6fda7350 3851 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3852errout_ifa:
6c223828 3853 in6_ifa_put(ifa);
1b29fc2c 3854errout:
6c223828 3855 return err;
6c223828
NT		 3856}
3857
1da177e4
LT		 3858static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3859{
3860 struct sk_buff *skb;
c346dca1 3861 struct net *net = dev_net(ifa->idev->dev);
5d620266 3862 int err = -ENOBUFS;
1da177e4 3863
0ab6803b 3864 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3865 if (skb == NULL)
3866 goto errout;
3867
3868 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3869 if (err < 0) {
3870 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3871 WARN_ON(err == -EMSGSIZE);
3872 kfree_skb(skb);
3873 goto errout;
3874 }
1ce85fe4
PNA		 3875 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3876 return;
5d620266
TG		 3877errout:
3878 if (err < 0)
6fda7350 3879 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3880}
3881
b6f99a21 3882static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3883 __s32 *array, int bytes)
3884{
04561c1f
TG		 3885 BUG_ON(bytes < (DEVCONF_MAX * 4));
3886
1da177e4
LT		 3887 memset(array, 0, bytes);
3888 array[DEVCONF_FORWARDING] = cnf->forwarding;
3889 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3890 array[DEVCONF_MTU6] = cnf->mtu6;
3891 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3892 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3893 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3894 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3895 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
93908d19
TG		 3896 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
3897 jiffies_to_msecs(cnf->rtr_solicit_interval);
3898 array[DEVCONF_RTR_SOLICIT_DELAY] =
3899 jiffies_to_msecs(cnf->rtr_solicit_delay);
1da177e4
LT		 3900 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3901#ifdef CONFIG_IPV6_PRIVACY
3902 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3903 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3904 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3905 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3906 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3907#endif
3908 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3909 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3910 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3911#ifdef CONFIG_IPV6_ROUTER_PREF
3912 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
93908d19
TG		 3913 array[DEVCONF_RTR_PROBE_INTERVAL] =
3914 jiffies_to_msecs(cnf->rtr_probe_interval);
fa03ef38 3915#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3916 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3917#endif
930d6ff2 3918#endif
fbea49e1 3919 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3920 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3921#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3922 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3923#endif
7bc570c8
YH		 3924#ifdef CONFIG_IPV6_MROUTE
3925 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3926#endif
778d80be 3927 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3928 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
c3faca05 3929 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
1da177e4
LT		 3930}
3931
b382b191
TG		 3932static inline size_t inet6_ifla6_size(void)
3933{
3934 return nla_total_size(4) /* IFLA_INET6_FLAGS */
3935 + nla_total_size(sizeof(struct ifla_cacheinfo))
3936 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
3937 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3938 + nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */
3939}
3940
339bf98f
TG		 3941static inline size_t inet6_if_nlmsg_size(void)
3942{
3943 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3944 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3945 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3946 + nla_total_size(4) /* IFLA_MTU */
3947 + nla_total_size(4) /* IFLA_LINK */
b382b191 3948 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
339bf98f 3949}
c5396a31 3950
be281e55 3951static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
7d720c3e 3952 int items, int bytes)
7f7d9a6b
HX		 3953{
3954 int i;
3955 int pad = bytes - sizeof(u64) * items;
3956 BUG_ON(pad < 0);
3957
3958 /* Use put_unaligned() because stats may not be aligned for u64. */
3959 put_unaligned(items, &stats[0]);
3960 for (i = 1; i < items; i++)
be281e55 3961 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
7f7d9a6b
HX		 3962
3963 memset(&stats[items], 0, pad);
3964}
3965
4ce3c183
ED		 3966static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib,
3967 int items, int bytes, size_t syncpoff)
3968{
3969 int i;
3970 int pad = bytes - sizeof(u64) * items;
3971 BUG_ON(pad < 0);
3972
3973 /* Use put_unaligned() because stats may not be aligned for u64. */
3974 put_unaligned(items, &stats[0]);
3975 for (i = 1; i < items; i++)
3976 put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]);
3977
3978 memset(&stats[items], 0, pad);
3979}
3980
7f7d9a6b
HX		 3981static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3982 int bytes)
3983{
e21e8467 3984 switch (attrtype) {
7f7d9a6b 3985 case IFLA_INET6_STATS:
4ce3c183
ED		 3986 __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6,
3987 IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
7f7d9a6b
HX		 3988 break;
3989 case IFLA_INET6_ICMP6STATS:
be281e55 3990 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
7f7d9a6b
HX		 3991 break;
3992 }
3993}
3994
b382b191
TG		 3995static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
3996{
3997 struct nlattr *nla;
3998 struct ifla_cacheinfo ci;
3999
c78679e8
DM		 4000 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4001 goto nla_put_failure;
b382b191 4002 ci.max_reasm_len = IPV6_MAXPLEN;
24912420
DM		 4003 ci.tstamp = cstamp_delta(idev->tstamp);
4004 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
4005 ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time);
c78679e8
DM		 4006 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4007 goto nla_put_failure;
b382b191
TG		 4008 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
4009 if (nla == NULL)
4010 goto nla_put_failure;
4011 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
4012
4013 /* XXX - MC not implemented */
4014
4015 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
4016 if (nla == NULL)
4017 goto nla_put_failure;
4018 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4019
4020 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
4021 if (nla == NULL)
4022 goto nla_put_failure;
4023 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
4024
4025 return 0;
4026
4027nla_put_failure:
4028 return -EMSGSIZE;
4029}
4030
4031static size_t inet6_get_link_af_size(const struct net_device *dev)
4032{
4033 if (!__in6_dev_get(dev))
4034 return 0;
4035
4036 return inet6_ifla6_size();
4037}
4038
4039static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
4040{
4041 struct inet6_dev *idev = __in6_dev_get(dev);
4042
4043 if (!idev)
4044 return -ENODATA;
4045
4046 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4047 return -EMSGSIZE;
4048
4049 return 0;
4050}
4051
1ab1457c 4052static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 4053 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 4054{
04561c1f 4055 struct net_device *dev = idev->dev;
04561c1f
TG		 4056 struct ifinfomsg *hdr;
4057 struct nlmsghdr *nlh;
4058 void *protoinfo;
04561c1f
TG		 4059
4060 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
4061 if (nlh == NULL)
26932566 4062 return -EMSGSIZE;
04561c1f
TG		 4063
4064 hdr = nlmsg_data(nlh);
4065 hdr->ifi_family = AF_INET6;
4066 hdr->__ifi_pad = 0;
4067 hdr->ifi_type = dev->type;
4068 hdr->ifi_index = dev->ifindex;
4069 hdr->ifi_flags = dev_get_flags(dev);
4070 hdr->ifi_change = 0;
4071
c78679e8
DM		 4072 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4073 (dev->addr_len &&
4074 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4075 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4076 (dev->ifindex != dev->iflink &&
4077 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
4078 goto nla_put_failure;
04561c1f
TG		 4079 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
4080 if (protoinfo == NULL)
4081 goto nla_put_failure;
1da177e4 4082
b382b191 4083 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
bf99f1bd 4084 goto nla_put_failure;
1da177e4 4085
04561c1f
TG		 4086 nla_nest_end(skb, protoinfo);
4087 return nlmsg_end(skb, nlh);
1da177e4 4088
04561c1f 4089nla_put_failure:
26932566
PM		 4090 nlmsg_cancel(skb, nlh);
4091 return -EMSGSIZE;
1da177e4
LT		 4092}
4093
4094static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
4095{
3b1e0a65 4096 struct net *net = sock_net(skb->sk);
84d2697d 4097 int h, s_h;
434a8a58 4098 int idx = 0, s_idx;
1da177e4
LT		 4099 struct net_device *dev;
4100 struct inet6_dev *idev;
84d2697d
ED		 4101 struct hlist_head *head;
4102 struct hlist_node *node;
1da177e4 4103
84d2697d
ED		 4104 s_h = cb->args[0];
4105 s_idx = cb->args[1];
4106
4107 rcu_read_lock();
4108 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4109 idx = 0;
4110 head = &net->dev_index_head[h];
4111 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
4112 if (idx < s_idx)
4113 goto cont;
4114 idev = __in6_dev_get(dev);
4115 if (!idev)
4116 goto cont;
4117 if (inet6_fill_ifinfo(skb, idev,
4118 NETLINK_CB(cb->skb).pid,
4119 cb->nlh->nlmsg_seq,
4120 RTM_NEWLINK, NLM_F_MULTI) <= 0)
4121 goto out;
7562f876 4122cont:
84d2697d
ED		 4123 idx++;
4124 }
1da177e4 4125 }
84d2697d
ED		 4126out:
4127 rcu_read_unlock();
4128 cb->args[1] = idx;
4129 cb->args[0] = h;
1da177e4
LT		 4130
4131 return skb->len;
4132}
4133
4134void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
4135{
4136 struct sk_buff *skb;
c346dca1 4137 struct net *net = dev_net(idev->dev);
8d7a76c9 4138 int err = -ENOBUFS;
1ab1457c 4139
339bf98f 4140 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 4141 if (skb == NULL)
4142 goto errout;
4143
4144 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 4145 if (err < 0) {
4146 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4147 WARN_ON(err == -EMSGSIZE);
4148 kfree_skb(skb);
4149 goto errout;
4150 }
5f75a104 4151 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
1ce85fe4 4152 return;
8d7a76c9
TG		 4153errout:
4154 if (err < 0)
5f75a104 4155 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
1da177e4
LT		 4156}
4157
339bf98f
TG		 4158static inline size_t inet6_prefix_nlmsg_size(void)
4159{
4160 return NLMSG_ALIGN(sizeof(struct prefixmsg))
4161 + nla_total_size(sizeof(struct in6_addr))
4162 + nla_total_size(sizeof(struct prefix_cacheinfo));
4163}
c5396a31 4164
1da177e4 4165static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 4166 struct prefix_info *pinfo, u32 pid, u32 seq,
4167 int event, unsigned int flags)
1da177e4 4168{
6051e2f4
TG		 4169 struct prefixmsg *pmsg;
4170 struct nlmsghdr *nlh;
1da177e4
LT		 4171 struct prefix_cacheinfo ci;
4172
6051e2f4
TG		 4173 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
4174 if (nlh == NULL)
26932566 4175 return -EMSGSIZE;
6051e2f4
TG		 4176
4177 pmsg = nlmsg_data(nlh);
1da177e4 4178 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 4179 pmsg->prefix_pad1 = 0;
4180 pmsg->prefix_pad2 = 0;
1da177e4
LT		 4181 pmsg->prefix_ifindex = idev->dev->ifindex;
4182 pmsg->prefix_len = pinfo->prefix_len;
4183 pmsg->prefix_type = pinfo->type;
8a47077a 4184 pmsg->prefix_pad3 = 0;
1da177e4
LT		 4185 pmsg->prefix_flags = 0;
4186 if (pinfo->onlink)
4187 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
4188 if (pinfo->autoconf)
4189 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
4190
c78679e8
DM		 4191 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
4192 goto nla_put_failure;
1da177e4
LT		 4193 ci.preferred_time = ntohl(pinfo->prefered);
4194 ci.valid_time = ntohl(pinfo->valid);
c78679e8
DM		 4195 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
4196 goto nla_put_failure;
6051e2f4 4197 return nlmsg_end(skb, nlh);
1da177e4 4198
6051e2f4 4199nla_put_failure:
26932566
PM		 4200 nlmsg_cancel(skb, nlh);
4201 return -EMSGSIZE;
1da177e4
LT		 4202}
4203
1ab1457c 4204static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 4205 struct prefix_info *pinfo)
4206{
4207 struct sk_buff *skb;
c346dca1 4208 struct net *net = dev_net(idev->dev);
8c384bfa 4209 int err = -ENOBUFS;
1da177e4 4210
339bf98f 4211 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 4212 if (skb == NULL)
4213 goto errout;
4214
4215 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 4216 if (err < 0) {
4217 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4218 WARN_ON(err == -EMSGSIZE);
4219 kfree_skb(skb);
4220 goto errout;
4221 }
1ce85fe4
PNA		 4222 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4223 return;
8c384bfa
TG		 4224errout:
4225 if (err < 0)
6fda7350 4226 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 4227}
4228
1da177e4
LT		 4229static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4230{
4231 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4232
4233 switch (event) {
4234 case RTM_NEWADDR:
95c385b4
NH		 4235 /*
4236 * If the address was optimistic
4237 * we inserted the route at the start of
4238 * our DAD process, so we don't need
4239 * to do it again
4240 */
4241 if (!(ifp->rt->rt6i_node))
4242 ip6_ins_rt(ifp->rt);
1da177e4
LT		 4243 if (ifp->idev->cnf.forwarding)
4244 addrconf_join_anycast(ifp);
4245 break;
4246 case RTM_DELADDR:
4247 if (ifp->idev->cnf.forwarding)
4248 addrconf_leave_anycast(ifp);
4249 addrconf_leave_solict(ifp->idev, &ifp->addr);
d8d1f30b 4250 dst_hold(&ifp->rt->dst);
93fa159a 4251
73a8bd74 4252 if (ip6_del_rt(ifp->rt))
d8d1f30b 4253 dst_free(&ifp->rt->dst);
1da177e4
LT		 4254 break;
4255 }
4256}
4257
4258static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4259{
8814c4b5 4260 rcu_read_lock_bh();
1da177e4
LT		 4261 if (likely(ifp->idev->dead == 0))
4262 __ipv6_ifa_notify(event, ifp);
8814c4b5 4263 rcu_read_unlock_bh();
1da177e4
LT		 4264}
4265
4266#ifdef CONFIG_SYSCTL
4267
4268static
8d65af78 4269int addrconf_sysctl_forward(ctl_table *ctl, int write,
1da177e4
LT		 4270 void __user *buffer, size_t *lenp, loff_t *ppos)
4271{
4272 int *valp = ctl->data;
4273 int val = *valp;
88af182e 4274 loff_t pos = *ppos;
013d97e9 4275 ctl_table lctl;
1da177e4
LT		 4276 int ret;
4277
013d97e9
FR		 4278 /*
4279 * ctl->data points to idev->cnf.forwarding, we should
4280 * not modify it until we get the rtnl lock.
4281 */
4282 lctl = *ctl;
4283 lctl.data = &val;
4284
4285 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
1da177e4 4286
c8fecf22 4287 if (write)
b325fddb 4288 ret = addrconf_fixup_forwarding(ctl, valp, val);
88af182e
EB		 4289 if (ret)
4290 *ppos = pos;
1ab1457c 4291 return ret;
1da177e4
LT		 4292}
4293
56d417b1
BH		 4294static void dev_disable_change(struct inet6_dev *idev)
4295{
4296 if (!idev || !idev->dev)
4297 return;
4298
4299 if (idev->cnf.disable_ipv6)
4300 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4301 else
4302 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4303}
4304
4305static void addrconf_disable_change(struct net *net, __s32 newf)
4306{
4307 struct net_device *dev;
4308 struct inet6_dev *idev;
4309
c6d14c84
ED		 4310 rcu_read_lock();
4311 for_each_netdev_rcu(net, dev) {
56d417b1
BH		 4312 idev = __in6_dev_get(dev);
4313 if (idev) {
4314 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4315 idev->cnf.disable_ipv6 = newf;
4316 if (changed)
4317 dev_disable_change(idev);
4318 }
56d417b1 4319 }
c6d14c84 4320 rcu_read_unlock();
56d417b1
BH		 4321}
4322
013d97e9 4323static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
56d417b1
BH		 4324{
4325 struct net *net;
013d97e9
FR		 4326 int old;
4327
4328 if (!rtnl_trylock())
4329 return restart_syscall();
56d417b1
BH		 4330
4331 net = (struct net *)table->extra2;
013d97e9
FR		 4332 old = *p;
4333 *p = newf;
56d417b1 4334
013d97e9
FR		 4335 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
4336 rtnl_unlock();
56d417b1 4337 return 0;
88af182e 4338 }
56d417b1
BH		 4339
4340 if (p == &net->ipv6.devconf_all->disable_ipv6) {
56d417b1
BH		 4341 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4342 addrconf_disable_change(net, newf);
013d97e9 4343 } else if ((!newf) ^ (!old))
56d417b1
BH		 4344 dev_disable_change((struct inet6_dev *)table->extra1);
4345
4346 rtnl_unlock();
4347 return 0;
4348}
4349
4350static
8d65af78 4351int addrconf_sysctl_disable(ctl_table *ctl, int write,
56d417b1
BH		 4352 void __user *buffer, size_t *lenp, loff_t *ppos)
4353{
4354 int *valp = ctl->data;
4355 int val = *valp;
88af182e 4356 loff_t pos = *ppos;
013d97e9 4357 ctl_table lctl;
56d417b1
BH		 4358 int ret;
4359
013d97e9
FR		 4360 /*
4361 * ctl->data points to idev->cnf.disable_ipv6, we should
4362 * not modify it until we get the rtnl lock.
4363 */
4364 lctl = *ctl;
4365 lctl.data = &val;
4366
4367 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
56d417b1
BH		 4368
4369 if (write)
4370 ret = addrconf_disable_ipv6(ctl, valp, val);
88af182e
EB		 4371 if (ret)
4372 *ppos = pos;
56d417b1
BH		 4373 return ret;
4374}
4375
1da177e4
LT		 4376static struct addrconf_sysctl_table
4377{
4378 struct ctl_table_header *sysctl_header;
f6a07b29 4379 ctl_table addrconf_vars[DEVCONF_MAX+1];
ab32ea5d 4380} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4381 .sysctl_header = NULL,
4382 .addrconf_vars = {
1ab1457c 4383 {
e21e8467
SH		 4384 .procname = "forwarding",
4385 .data = &ipv6_devconf.forwarding,
4386 .maxlen = sizeof(int),
4387 .mode = 0644,
4388 .proc_handler = addrconf_sysctl_forward,
1da177e4
LT		 4389 },
4390 {
e21e8467
SH		 4391 .procname = "hop_limit",
4392 .data = &ipv6_devconf.hop_limit,
4393 .maxlen = sizeof(int),
4394 .mode = 0644,
4395 .proc_handler = proc_dointvec,
1da177e4
LT		 4396 },
4397 {
e21e8467
SH		 4398 .procname = "mtu",
4399 .data = &ipv6_devconf.mtu6,
4400 .maxlen = sizeof(int),
4401 .mode = 0644,
4402 .proc_handler = proc_dointvec,
1da177e4
LT		 4403 },
4404 {
e21e8467
SH		 4405 .procname = "accept_ra",
4406 .data = &ipv6_devconf.accept_ra,
4407 .maxlen = sizeof(int),
4408 .mode = 0644,
4409 .proc_handler = proc_dointvec,
1da177e4
LT		 4410 },
4411 {
e21e8467
SH		 4412 .procname = "accept_redirects",
4413 .data = &ipv6_devconf.accept_redirects,
4414 .maxlen = sizeof(int),
4415 .mode = 0644,
4416 .proc_handler = proc_dointvec,
1da177e4
LT		 4417 },
4418 {
e21e8467
SH		 4419 .procname = "autoconf",
4420 .data = &ipv6_devconf.autoconf,
4421 .maxlen = sizeof(int),
4422 .mode = 0644,
4423 .proc_handler = proc_dointvec,
1da177e4
LT		 4424 },
4425 {
e21e8467
SH		 4426 .procname = "dad_transmits",
4427 .data = &ipv6_devconf.dad_transmits,
4428 .maxlen = sizeof(int),
4429 .mode = 0644,
4430 .proc_handler = proc_dointvec,
1da177e4
LT		 4431 },
4432 {
e21e8467
SH		 4433 .procname = "router_solicitations",
4434 .data = &ipv6_devconf.rtr_solicits,
4435 .maxlen = sizeof(int),
4436 .mode = 0644,
4437 .proc_handler = proc_dointvec,
1da177e4
LT		 4438 },
4439 {
e21e8467
SH		 4440 .procname = "router_solicitation_interval",
4441 .data = &ipv6_devconf.rtr_solicit_interval,
4442 .maxlen = sizeof(int),
4443 .mode = 0644,
4444 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4445 },
4446 {
e21e8467
SH		 4447 .procname = "router_solicitation_delay",
4448 .data = &ipv6_devconf.rtr_solicit_delay,
4449 .maxlen = sizeof(int),
4450 .mode = 0644,
4451 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4452 },
4453 {
e21e8467
SH		 4454 .procname = "force_mld_version",
4455 .data = &ipv6_devconf.force_mld_version,
4456 .maxlen = sizeof(int),
4457 .mode = 0644,
4458 .proc_handler = proc_dointvec,
1da177e4
LT		 4459 },
4460#ifdef CONFIG_IPV6_PRIVACY
4461 {
e21e8467
SH		 4462 .procname = "use_tempaddr",
4463 .data = &ipv6_devconf.use_tempaddr,
4464 .maxlen = sizeof(int),
4465 .mode = 0644,
4466 .proc_handler = proc_dointvec,
1da177e4
LT		 4467 },
4468 {
e21e8467
SH		 4469 .procname = "temp_valid_lft",
4470 .data = &ipv6_devconf.temp_valid_lft,
4471 .maxlen = sizeof(int),
4472 .mode = 0644,
4473 .proc_handler = proc_dointvec,
1da177e4
LT		 4474 },
4475 {
e21e8467
SH		 4476 .procname = "temp_prefered_lft",
4477 .data = &ipv6_devconf.temp_prefered_lft,
4478 .maxlen = sizeof(int),
4479 .mode = 0644,
4480 .proc_handler = proc_dointvec,
1da177e4
LT		 4481 },
4482 {
e21e8467
SH		 4483 .procname = "regen_max_retry",
4484 .data = &ipv6_devconf.regen_max_retry,
4485 .maxlen = sizeof(int),
4486 .mode = 0644,
4487 .proc_handler = proc_dointvec,
1da177e4
LT		 4488 },
4489 {
e21e8467
SH		 4490 .procname = "max_desync_factor",
4491 .data = &ipv6_devconf.max_desync_factor,
4492 .maxlen = sizeof(int),
4493 .mode = 0644,
4494 .proc_handler = proc_dointvec,
1da177e4
LT		 4495 },
4496#endif
4497 {
e21e8467
SH		 4498 .procname = "max_addresses",
4499 .data = &ipv6_devconf.max_addresses,
4500 .maxlen = sizeof(int),
4501 .mode = 0644,
4502 .proc_handler = proc_dointvec,
1da177e4 4503 },
65f5c7c1 4504 {
e21e8467
SH		 4505 .procname = "accept_ra_defrtr",
4506 .data = &ipv6_devconf.accept_ra_defrtr,
4507 .maxlen = sizeof(int),
4508 .mode = 0644,
4509 .proc_handler = proc_dointvec,
65f5c7c1 4510 },
c4fd30eb 4511 {
e21e8467
SH		 4512 .procname = "accept_ra_pinfo",
4513 .data = &ipv6_devconf.accept_ra_pinfo,
4514 .maxlen = sizeof(int),
4515 .mode = 0644,
4516 .proc_handler = proc_dointvec,
c4fd30eb 4517 },
930d6ff2
YH		 4518#ifdef CONFIG_IPV6_ROUTER_PREF
4519 {
e21e8467
SH		 4520 .procname = "accept_ra_rtr_pref",
4521 .data = &ipv6_devconf.accept_ra_rtr_pref,
4522 .maxlen = sizeof(int),
4523 .mode = 0644,
4524 .proc_handler = proc_dointvec,
930d6ff2 4525 },
52e16356 4526 {
e21e8467
SH		 4527 .procname = "router_probe_interval",
4528 .data = &ipv6_devconf.rtr_probe_interval,
4529 .maxlen = sizeof(int),
4530 .mode = 0644,
4531 .proc_handler = proc_dointvec_jiffies,
52e16356 4532 },
fa03ef38 4533#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4 4534 {
e21e8467
SH		 4535 .procname = "accept_ra_rt_info_max_plen",
4536 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4537 .maxlen = sizeof(int),
4538 .mode = 0644,
4539 .proc_handler = proc_dointvec,
09c884d4
YH		 4540 },
4541#endif
930d6ff2 4542#endif
fbea49e1 4543 {
e21e8467
SH		 4544 .procname = "proxy_ndp",
4545 .data = &ipv6_devconf.proxy_ndp,
4546 .maxlen = sizeof(int),
4547 .mode = 0644,
4548 .proc_handler = proc_dointvec,
fbea49e1 4549 },
0bcbc926 4550 {
e21e8467
SH		 4551 .procname = "accept_source_route",
4552 .data = &ipv6_devconf.accept_source_route,
4553 .maxlen = sizeof(int),
4554 .mode = 0644,
4555 .proc_handler = proc_dointvec,
0bcbc926 4556 },
95c385b4
NH		 4557#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4558 {
e21e8467
SH		 4559 .procname = "optimistic_dad",
4560 .data = &ipv6_devconf.optimistic_dad,
4561 .maxlen = sizeof(int),
4562 .mode = 0644,
4563 .proc_handler = proc_dointvec,
95c385b4
NH		 4564
4565 },
7bc570c8
YH		 4566#endif
4567#ifdef CONFIG_IPV6_MROUTE
4568 {
e21e8467
SH		 4569 .procname = "mc_forwarding",
4570 .data = &ipv6_devconf.mc_forwarding,
4571 .maxlen = sizeof(int),
4572 .mode = 0444,
4573 .proc_handler = proc_dointvec,
7bc570c8 4574 },
95c385b4 4575#endif
778d80be 4576 {
e21e8467
SH		 4577 .procname = "disable_ipv6",
4578 .data = &ipv6_devconf.disable_ipv6,
4579 .maxlen = sizeof(int),
4580 .mode = 0644,
4581 .proc_handler = addrconf_sysctl_disable,
778d80be 4582 },
1b34be74 4583 {
e21e8467
SH		 4584 .procname = "accept_dad",
4585 .data = &ipv6_devconf.accept_dad,
4586 .maxlen = sizeof(int),
4587 .mode = 0644,
4588 .proc_handler = proc_dointvec,
1b34be74 4589 },
f7734fdf 4590 {
f7734fdf
OP		 4591 .procname = "force_tllao",
4592 .data = &ipv6_devconf.force_tllao,
4593 .maxlen = sizeof(int),
4594 .mode = 0644,
4595 .proc_handler = proc_dointvec
4596 },
1da177e4 4597 {
f8572d8f 4598 /* sentinel */
1da177e4
LT		 4599 }
4600 },
1da177e4
LT		 4601};
4602
bff16c2f 4603static int __addrconf_sysctl_register(struct net *net, char *dev_name,
f8572d8f 4604 struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4605{
4606 int i;
1da177e4 4607 struct addrconf_sysctl_table *t;
6105e293 4608 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
1dab6222 4609
af879cc7 4610 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4611 if (t == NULL)
f68635e6
PE		 4612 goto out;
4613
bcdd553f 4614 for (i = 0; t->addrconf_vars[i].data; i++) {
e21e8467 4615 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
1da177e4 4616 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4617 t->addrconf_vars[i].extra2 = net;
1da177e4 4618 }
1da177e4 4619
6105e293 4620 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
1da177e4 4621
6105e293 4622 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
1da177e4 4623 if (t->sysctl_header == NULL)
6105e293 4624 goto free;
f68635e6
PE		 4625
4626 p->sysctl = t;
95897312 4627 return 0;
1da177e4 4628
f68635e6 4629free:
1da177e4 4630 kfree(t);
f68635e6 4631out:
95897312 4632 return -ENOBUFS;
1da177e4
LT		 4633}
4634
408c4768
PE		 4635static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4636{
4637 struct addrconf_sysctl_table *t;
4638
4639 if (p->sysctl == NULL)
4640 return;
4641
4642 t = p->sysctl;
4643 p->sysctl = NULL;
ff538818 4644 unregister_net_sysctl_table(t->sysctl_header);
408c4768
PE		 4645 kfree(t);
4646}
4647
f52295a9
PE		 4648static void addrconf_sysctl_register(struct inet6_dev *idev)
4649{
54716e3b 4650 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
f8572d8f 4651 &ndisc_ifinfo_sysctl_change);
c346dca1 4652 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
f8572d8f 4653 idev, &idev->cnf);
f52295a9
PE		 4654}
4655
408c4768 4656static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4657{
408c4768
PE		 4658 __addrconf_sysctl_unregister(&idev->cnf);
4659 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4660}
4661
4662
4663#endif
4664
2c8c1e72 4665static int __net_init addrconf_init_net(struct net *net)
e0da5a48
PE		 4666{
4667 int err;
4668 struct ipv6_devconf *all, *dflt;
4669
4670 err = -ENOMEM;
4671 all = &ipv6_devconf;
4672 dflt = &ipv6_devconf_dflt;
4673
09ad9bc7 4674 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4675 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4676 if (all == NULL)
4677 goto err_alloc_all;
4678
4679 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4680 if (dflt == NULL)
4681 goto err_alloc_dflt;
56d417b1
BH		 4682 } else {
4683 /* these will be inherited by all namespaces */
4684 dflt->autoconf = ipv6_defaults.autoconf;
4685 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
e0da5a48
PE		 4686 }
4687
4688 net->ipv6.devconf_all = all;
4689 net->ipv6.devconf_dflt = dflt;
4690
4691#ifdef CONFIG_SYSCTL
f8572d8f 4692 err = __addrconf_sysctl_register(net, "all", NULL, all);
e0da5a48
PE		 4693 if (err < 0)
4694 goto err_reg_all;
4695
f8572d8f 4696 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
e0da5a48
PE		 4697 if (err < 0)
4698 goto err_reg_dflt;
4699#endif
4700 return 0;
4701
4702#ifdef CONFIG_SYSCTL
4703err_reg_dflt:
4704 __addrconf_sysctl_unregister(all);
4705err_reg_all:
4706 kfree(dflt);
4707#endif
4708err_alloc_dflt:
4709 kfree(all);
4710err_alloc_all:
4711 return err;
4712}
4713
2c8c1e72 4714static void __net_exit addrconf_exit_net(struct net *net)
e0da5a48
PE		 4715{
4716#ifdef CONFIG_SYSCTL
4717 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4718 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4719#endif
09ad9bc7 4720 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4721 kfree(net->ipv6.devconf_dflt);
4722 kfree(net->ipv6.devconf_all);
4723 }
4724}
4725
4726static struct pernet_operations addrconf_ops = {
4727 .init = addrconf_init_net,
4728 .exit = addrconf_exit_net,
4729};
4730
1da177e4
LT		 4731/*
4732 * Device notifier
4733 */
4734
4735int register_inet6addr_notifier(struct notifier_block *nb)
4736{
1ab1457c 4737 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4 4738}
7159039a
YH		 4739EXPORT_SYMBOL(register_inet6addr_notifier);
4740
1da177e4
LT		 4741int unregister_inet6addr_notifier(struct notifier_block *nb)
4742{
e21e8467 4743 return atomic_notifier_chain_unregister(&inet6addr_chain, nb);
1da177e4 4744}
7159039a
YH		 4745EXPORT_SYMBOL(unregister_inet6addr_notifier);
4746
b382b191
TG		 4747static struct rtnl_af_ops inet6_ops = {
4748 .family = AF_INET6,
4749 .fill_link_af = inet6_fill_link_af,
4750 .get_link_af_size = inet6_get_link_af_size,
b382b191
TG		 4751};
4752
1da177e4
LT		 4753/*
4754 * Init / cleanup code
4755 */
4756
4757int __init addrconf_init(void)
4758{
c2e21293 4759 int i, err;
2a8cc6c8 4760
e21e8467
SH		 4761 err = ipv6_addr_label_init();
4762 if (err < 0) {
4763 printk(KERN_CRIT "IPv6 Addrconf:"
4764 " cannot initialize default policy table: %d.\n", err);
2cc6d2bf 4765 goto out;
2a8cc6c8 4766 }
1da177e4 4767
2cc6d2bf
NH		 4768 err = register_pernet_subsys(&addrconf_ops);
4769 if (err < 0)
4770 goto out_addrlabel;
e0da5a48 4771
1da177e4
LT		 4772 /* The addrconf netdev notifier requires that loopback_dev
4773 * has it's ipv6 private information allocated and setup
4774 * before it can bring up and give link-local addresses
4775 * to other devices which are up.
4776 *
4777 * Unfortunately, loopback_dev is not necessarily the first
4778 * entry in the global dev_base list of net devices. In fact,
4779 * it is likely to be the very last entry on that list.
4780 * So this causes the notifier registry below to try and
4781 * give link-local addresses to all devices besides loopback_dev
4782 * first, then loopback_dev, which cases all the non-loopback_dev
4783 * devices to fail to get a link-local address.
4784 *
4785 * So, as a temporary fix, allocate the ipv6 structure for
4786 * loopback_dev first by hand.
4787 * Longer term, all of the dependencies ipv6 has upon the loopback
4788 * device and it being up should be removed.
4789 */
4790 rtnl_lock();
2774c7ab 4791 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4792 err = -ENOMEM;
4793 rtnl_unlock();
4794 if (err)
e0da5a48 4795 goto errlo;
1da177e4 4796
c2e21293 4797 for (i = 0; i < IN6_ADDR_HSIZE; i++)
4798 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
4799
1da177e4
LT		 4800 register_netdevice_notifier(&ipv6_dev_notf);
4801
1da177e4 4802 addrconf_verify(0);
c127ea2c 4803
b382b191
TG		 4804 err = rtnl_af_register(&inet6_ops);
4805 if (err < 0)
4806 goto errout_af;
4807
c7ac8679
GR		 4808 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
4809 NULL);
c127ea2c
TG		 4810 if (err < 0)
4811 goto errout;
4812
4813 /* Only the first call to __rtnl_register can fail */
c7ac8679
GR		 4814 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
4815 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
4816 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
4817 inet6_dump_ifaddr, NULL);
4818 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
4819 inet6_dump_ifmcaddr, NULL);
4820 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
4821 inet6_dump_ifacaddr, NULL);
c127ea2c 4822
2a8cc6c8
YH		 4823 ipv6_addr_label_rtnl_register();
4824
1da177e4 4825 return 0;
c127ea2c 4826errout:
b382b191
TG		 4827 rtnl_af_unregister(&inet6_ops);
4828errout_af:
c127ea2c 4829 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4830errlo:
4831 unregister_pernet_subsys(&addrconf_ops);
2cc6d2bf
NH		 4832out_addrlabel:
4833 ipv6_addr_label_cleanup();
4834out:
c127ea2c 4835 return err;
1da177e4
LT		 4836}
4837
09f7709f 4838void addrconf_cleanup(void)
1da177e4 4839{
176c39af 4840 struct net_device *dev;
1da177e4
LT		 4841 int i;
4842
4843 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48 4844 unregister_pernet_subsys(&addrconf_ops);
2cc6d2bf 4845 ipv6_addr_label_cleanup();
1da177e4
LT		 4846
4847 rtnl_lock();
4848
b382b191
TG		 4849 __rtnl_af_unregister(&inet6_ops);
4850
176c39af
DL		 4851 /* clean dev list */
4852 for_each_netdev(&init_net, dev) {
4853 if (__in6_dev_get(dev) == NULL)
4854 continue;
4855 addrconf_ifdown(dev, 1);
4856 }
4857 addrconf_ifdown(init_net.loopback_dev, 2);
4858
1da177e4
LT		 4859 /*
4860 * Check hash table.
4861 */
5c578aed 4862 spin_lock_bh(&addrconf_hash_lock);
c2e21293 4863 for (i = 0; i < IN6_ADDR_HSIZE; i++)
4864 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
5c578aed 4865 spin_unlock_bh(&addrconf_hash_lock);
1da177e4
LT		 4866
4867 del_timer(&addr_chk_timer);
1da177e4 4868 rtnl_unlock();
1da177e4 4869}
kernel source for telekom puls (alcatel/mediatek)