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COSA/SRP: convert channel_data.rsem to mutex
[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 *
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17/*
18 * Changes:
19 *
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
23 * unload.
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
26 * packets.
27 * yoshfuji@USAGI : Fixed interval between DAD
28 * packets.
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
32 * support.
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
37 * seq_file.
b1cacb68
YH		 38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
40 * status etc.
1da177e4
LT		 41 */
42
1da177e4
LT		 43#include <linux/errno.h>
44#include <linux/types.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
1da177e4
LT		 47#include <linux/net.h>
48#include <linux/in6.h>
49#include <linux/netdevice.h>
1823730f 50#include <linux/if_addr.h>
1da177e4
LT		 51#include <linux/if_arp.h>
52#include <linux/if_arcnet.h>
53#include <linux/if_infiniband.h>
54#include <linux/route.h>
55#include <linux/inetdevice.h>
56#include <linux/init.h>
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
69#include <net/ipv6.h>
70#include <net/protocol.h>
71#include <net/ndisc.h>
72#include <net/ip6_route.h>
73#include <net/addrconf.h>
74#include <net/tcp.h>
75#include <net/ip.h>
5d620266 76#include <net/netlink.h>
f24e3d65 77#include <net/pkt_sched.h>
1da177e4
LT		 78#include <linux/if_tunnel.h>
79#include <linux/rtnetlink.h>
80
81#ifdef CONFIG_IPV6_PRIVACY
82#include <linux/random.h>
1da177e4
LT		 83#endif
84
85#include <asm/uaccess.h>
7f7d9a6b 86#include <asm/unaligned.h>
1da177e4
LT		 87
88#include <linux/proc_fs.h>
89#include <linux/seq_file.h>
90
91/* Set to 3 to get tracing... */
92#define ACONF_DEBUG 2
93
94#if ACONF_DEBUG >= 3
95#define ADBG(x) printk x
96#else
97#define ADBG(x)
98#endif
99
100#define INFINITY_LIFE_TIME 0xFFFFFFFF
101#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
102
103#ifdef CONFIG_SYSCTL
f52295a9 104static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 105static void addrconf_sysctl_unregister(struct inet6_dev *idev);
106#else
107static inline void addrconf_sysctl_register(struct inet6_dev *idev)
108{
109}
110
111static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
112{
113}
1da177e4
LT		 114#endif
115
116#ifdef CONFIG_IPV6_PRIVACY
117static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 118static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 119static void ipv6_regen_rndid(unsigned long data);
120
121static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 122#endif
123
124static int ipv6_count_addresses(struct inet6_dev *idev);
125
126/*
127 * Configured unicast address hash table
128 */
129static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
130static DEFINE_RWLOCK(addrconf_hash_lock);
131
1da177e4
LT		 132static void addrconf_verify(unsigned long);
133
8d06afab 134static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 135static DEFINE_SPINLOCK(addrconf_verify_lock);
136
137static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
138static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
139
140static int addrconf_ifdown(struct net_device *dev, int how);
141
e431b8c0 142static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 143static void addrconf_dad_timer(unsigned long data);
144static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 145static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 146static void addrconf_rs_timer(unsigned long data);
147static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
148static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
149
1ab1457c 150static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 151 struct prefix_info *pinfo);
06bfe655
DL		 152static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
153 struct net_device *dev);
1da177e4 154
e041c683 155static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 156
ab32ea5d 157struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 158 .forwarding = 0,
159 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
160 .mtu6 = IPV6_MIN_MTU,
161 .accept_ra = 1,
162 .accept_redirects = 1,
163 .autoconf = 1,
164 .force_mld_version = 0,
165 .dad_transmits = 1,
166 .rtr_solicits = MAX_RTR_SOLICITATIONS,
167 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
168 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
169#ifdef CONFIG_IPV6_PRIVACY
170 .use_tempaddr = 0,
171 .temp_valid_lft = TEMP_VALID_LIFETIME,
172 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
173 .regen_max_retry = REGEN_MAX_RETRY,
174 .max_desync_factor = MAX_DESYNC_FACTOR,
175#endif
176 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 177 .accept_ra_defrtr = 1,
c4fd30eb 178 .accept_ra_pinfo = 1,
930d6ff2
YH		 179#ifdef CONFIG_IPV6_ROUTER_PREF
180 .accept_ra_rtr_pref = 1,
52e16356 181 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 182#ifdef CONFIG_IPV6_ROUTE_INFO
183 .accept_ra_rt_info_max_plen = 0,
184#endif
930d6ff2 185#endif
fbea49e1 186 .proxy_ndp = 0,
0bcbc926 187 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 188};
189
ab32ea5d 190static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 191 .forwarding = 0,
192 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
193 .mtu6 = IPV6_MIN_MTU,
194 .accept_ra = 1,
195 .accept_redirects = 1,
196 .autoconf = 1,
197 .dad_transmits = 1,
198 .rtr_solicits = MAX_RTR_SOLICITATIONS,
199 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
200 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
201#ifdef CONFIG_IPV6_PRIVACY
202 .use_tempaddr = 0,
203 .temp_valid_lft = TEMP_VALID_LIFETIME,
204 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
205 .regen_max_retry = REGEN_MAX_RETRY,
206 .max_desync_factor = MAX_DESYNC_FACTOR,
207#endif
208 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 209 .accept_ra_defrtr = 1,
c4fd30eb 210 .accept_ra_pinfo = 1,
930d6ff2
YH		 211#ifdef CONFIG_IPV6_ROUTER_PREF
212 .accept_ra_rtr_pref = 1,
52e16356 213 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 214#ifdef CONFIG_IPV6_ROUTE_INFO
215 .accept_ra_rt_info_max_plen = 0,
216#endif
930d6ff2 217#endif
fbea49e1 218 .proxy_ndp = 0,
0bcbc926 219 .accept_source_route = 0, /* we do not accept RH0 by default. */
1da177e4
LT		 220};
221
222/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 223const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4
LT		 224const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
225
f24e3d65
MC		 226/* Check if a valid qdisc is available */
227static inline int addrconf_qdisc_ok(struct net_device *dev)
228{
229 return (dev->qdisc != &noop_qdisc);
230}
231
1da177e4
LT		 232static void addrconf_del_timer(struct inet6_ifaddr *ifp)
233{
234 if (del_timer(&ifp->timer))
235 __in6_ifa_put(ifp);
236}
237
238enum addrconf_timer_t
239{
240 AC_NONE,
241 AC_DAD,
242 AC_RS,
243};
244
245static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
246 enum addrconf_timer_t what,
247 unsigned long when)
248{
249 if (!del_timer(&ifp->timer))
250 in6_ifa_hold(ifp);
251
252 switch (what) {
253 case AC_DAD:
254 ifp->timer.function = addrconf_dad_timer;
255 break;
256 case AC_RS:
257 ifp->timer.function = addrconf_rs_timer;
258 break;
259 default:;
260 }
261 ifp->timer.expires = jiffies + when;
262 add_timer(&ifp->timer);
263}
264
7f7d9a6b
HX		 265static int snmp6_alloc_dev(struct inet6_dev *idev)
266{
7f7d9a6b 267 if (snmp_mib_init((void **)idev->stats.ipv6,
c69bce20 268 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b
HX		 269 goto err_ip;
270 if (snmp_mib_init((void **)idev->stats.icmpv6,
c69bce20 271 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 272 goto err_icmp;
14878f75 273 if (snmp_mib_init((void **)idev->stats.icmpv6msg,
c69bce20 274 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 275 goto err_icmpmsg;
7f7d9a6b
HX		 276
277 return 0;
278
14878f75
DS		 279err_icmpmsg:
280 snmp_mib_free((void **)idev->stats.icmpv6);
7f7d9a6b
HX		 281err_icmp:
282 snmp_mib_free((void **)idev->stats.ipv6);
283err_ip:
aaf70ec7 284 return -ENOMEM;
7f7d9a6b
HX		 285}
286
16910b98 287static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 288{
14878f75 289 snmp_mib_free((void **)idev->stats.icmpv6msg);
7f7d9a6b
HX		 290 snmp_mib_free((void **)idev->stats.icmpv6);
291 snmp_mib_free((void **)idev->stats.ipv6);
7f7d9a6b
HX		 292}
293
1da177e4
LT		 294/* Nobody refers to this device, we may destroy it. */
295
8814c4b5
YH		 296static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
297{
298 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
299 kfree(idev);
300}
301
1da177e4
LT		 302void in6_dev_finish_destroy(struct inet6_dev *idev)
303{
304 struct net_device *dev = idev->dev;
305 BUG_TRAP(idev->addr_list==NULL);
306 BUG_TRAP(idev->mc_list==NULL);
307#ifdef NET_REFCNT_DEBUG
308 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
309#endif
310 dev_put(dev);
311 if (!idev->dead) {
312 printk("Freeing alive inet6 device %p\n", idev);
313 return;
314 }
315 snmp6_free_dev(idev);
8814c4b5 316 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 317}
318
7159039a
YH		 319EXPORT_SYMBOL(in6_dev_finish_destroy);
320
1da177e4
LT		 321static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
322{
323 struct inet6_dev *ndev;
d88ae4cc 324 struct in6_addr maddr;
1da177e4
LT		 325
326 ASSERT_RTNL();
327
328 if (dev->mtu < IPV6_MIN_MTU)
329 return NULL;
330
1ab1457c 331 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 332
1ab1457c
YH		 333 if (ndev == NULL)
334 return NULL;
322f74a4
IO		 335
336 rwlock_init(&ndev->lock);
337 ndev->dev = dev;
441fc2a2 338 memcpy(&ndev->cnf, dev->nd_net->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 339 ndev->cnf.mtu6 = dev->mtu;
340 ndev->cnf.sysctl = NULL;
341 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
342 if (ndev->nd_parms == NULL) {
343 kfree(ndev);
344 return NULL;
345 }
346 /* We refer to the device */
347 dev_hold(dev);
1da177e4 348
322f74a4
IO		 349 if (snmp6_alloc_dev(ndev) < 0) {
350 ADBG((KERN_WARNING
351 "%s(): cannot allocate memory for statistics; dev=%s.\n",
352 __FUNCTION__, dev->name));
353 neigh_parms_release(&nd_tbl, ndev->nd_parms);
354 ndev->dead = 1;
355 in6_dev_finish_destroy(ndev);
356 return NULL;
357 }
1da177e4 358
322f74a4
IO		 359 if (snmp6_register_dev(ndev) < 0) {
360 ADBG((KERN_WARNING
361 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
362 __FUNCTION__, dev->name));
363 neigh_parms_release(&nd_tbl, ndev->nd_parms);
364 ndev->dead = 1;
365 in6_dev_finish_destroy(ndev);
366 return NULL;
367 }
368
369 /* One reference from device. We must do this before
370 * we invoke __ipv6_regen_rndid().
371 */
372 in6_dev_hold(ndev);
1da177e4
LT		 373
374#ifdef CONFIG_IPV6_PRIVACY
b24b8a24 375 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 376 if ((dev->flags&IFF_LOOPBACK) ||
377 dev->type == ARPHRD_TUNNEL ||
0be669bb
JR		 378#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
379 dev->type == ARPHRD_SIT ||
380#endif
381 dev->type == ARPHRD_NONE) {
322f74a4
IO		 382 printk(KERN_INFO
383 "%s: Disabled Privacy Extensions\n",
384 dev->name);
385 ndev->cnf.use_tempaddr = -1;
c7dc89c0
FT		 386
387 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
388 printk(KERN_INFO
389 "%s: Disabled Multicast RS\n",
390 dev->name);
391 ndev->cnf.rtr_solicits = 0;
392 }
322f74a4
IO		 393 } else {
394 in6_dev_hold(ndev);
395 ipv6_regen_rndid((unsigned long) ndev);
396 }
1da177e4
LT		 397#endif
398
f24e3d65 399 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 400 ndev->if_flags |= IF_READY;
401
322f74a4
IO		 402 ipv6_mc_init_dev(ndev);
403 ndev->tstamp = jiffies;
f52295a9 404 addrconf_sysctl_register(ndev);
30c4cf57
DS		 405 /* protected by rtnl_lock */
406 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 407
408 /* Join all-node multicast group */
409 ipv6_addr_all_nodes(&maddr);
410 ipv6_dev_mc_inc(dev, &maddr);
411
1da177e4
LT		 412 return ndev;
413}
414
415static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
416{
417 struct inet6_dev *idev;
418
419 ASSERT_RTNL();
420
421 if ((idev = __in6_dev_get(dev)) == NULL) {
422 if ((idev = ipv6_add_dev(dev)) == NULL)
423 return NULL;
424 }
c5e33bdd 425
1da177e4
LT		 426 if (dev->flags&IFF_UP)
427 ipv6_mc_up(idev);
428 return idev;
429}
430
431#ifdef CONFIG_SYSCTL
432static void dev_forward_change(struct inet6_dev *idev)
433{
434 struct net_device *dev;
435 struct inet6_ifaddr *ifa;
436 struct in6_addr addr;
437
438 if (!idev)
439 return;
440 dev = idev->dev;
441 if (dev && (dev->flags & IFF_MULTICAST)) {
442 ipv6_addr_all_routers(&addr);
1ab1457c 443
1da177e4
LT		 444 if (idev->cnf.forwarding)
445 ipv6_dev_mc_inc(dev, &addr);
446 else
447 ipv6_dev_mc_dec(dev, &addr);
448 }
449 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
2c12a74c
MW		 450 if (ifa->flags&IFA_F_TENTATIVE)
451 continue;
1da177e4
LT		 452 if (idev->cnf.forwarding)
453 addrconf_join_anycast(ifa);
454 else
455 addrconf_leave_anycast(ifa);
456 }
457}
458
459
e186932b 460static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 461{
462 struct net_device *dev;
463 struct inet6_dev *idev;
464
465 read_lock(&dev_base_lock);
bff16c2f 466 for_each_netdev(net, dev) {
8814c4b5 467 rcu_read_lock();
1da177e4
LT		 468 idev = __in6_dev_get(dev);
469 if (idev) {
e186932b
PE		 470 int changed = (!idev->cnf.forwarding) ^ (!newf);
471 idev->cnf.forwarding = newf;
1da177e4
LT		 472 if (changed)
473 dev_forward_change(idev);
474 }
8814c4b5 475 rcu_read_unlock();
1da177e4
LT		 476 }
477 read_unlock(&dev_base_lock);
478}
c8fecf22
PE		 479
480static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
481{
bff16c2f
PE		 482 struct net *net;
483
484 net = (struct net *)table->extra2;
441fc2a2 485 if (p == &net->ipv6.devconf_dflt->forwarding)
c8fecf22
PE		 486 return;
487
e186932b
PE		 488 if (p == &net->ipv6.devconf_all->forwarding) {
489 __s32 newf = net->ipv6.devconf_all->forwarding;
490 net->ipv6.devconf_dflt->forwarding = newf;
491 addrconf_forward_change(net, newf);
c8fecf22
PE		 492 } else if ((!*p) ^ (!old))
493 dev_forward_change((struct inet6_dev *)table->extra1);
494
495 if (*p)
7b4da532 496 rt6_purge_dflt_routers(net);
c8fecf22 497}
1da177e4
LT		 498#endif
499
500/* Nobody refers to this ifaddr, destroy it */
501
502void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
503{
504 BUG_TRAP(ifp->if_next==NULL);
505 BUG_TRAP(ifp->lst_next==NULL);
506#ifdef NET_REFCNT_DEBUG
507 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
508#endif
509
510 in6_dev_put(ifp->idev);
511
512 if (del_timer(&ifp->timer))
513 printk("Timer is still running, when freeing ifa=%p\n", ifp);
514
515 if (!ifp->dead) {
516 printk("Freeing alive inet6 address %p\n", ifp);
517 return;
518 }
519 dst_release(&ifp->rt->u.dst);
520
521 kfree(ifp);
522}
523
e55ffac6
BH		 524static void
525ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
526{
527 struct inet6_ifaddr *ifa, **ifap;
8a6ce0c0 528 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 529
530 /*
531 * Each device address list is sorted in order of scope -
532 * global before linklocal.
533 */
534 for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
535 ifap = &ifa->if_next) {
8a6ce0c0 536 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 537 break;
538 }
539
540 ifp->if_next = *ifap;
541 *ifap = ifp;
542}
543
1da177e4
LT		 544/* On success it returns ifp with increased reference count */
545
546static struct inet6_ifaddr *
547ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 548 int scope, u32 flags)
1da177e4
LT		 549{
550 struct inet6_ifaddr *ifa = NULL;
551 struct rt6_info *rt;
552 int hash;
553 int err = 0;
554
8814c4b5 555 rcu_read_lock_bh();
1da177e4
LT		 556 if (idev->dead) {
557 err = -ENODEV; /*XXX*/
558 goto out2;
559 }
560
561 write_lock(&addrconf_hash_lock);
562
563 /* Ignore adding duplicate addresses on an interface */
6fda7350 564 if (ipv6_chk_same_addr(idev->dev->nd_net, addr, idev->dev)) {
1da177e4
LT		 565 ADBG(("ipv6_add_addr: already assigned\n"));
566 err = -EEXIST;
567 goto out;
568 }
569
322f74a4 570 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 571
572 if (ifa == NULL) {
573 ADBG(("ipv6_add_addr: malloc failed\n"));
574 err = -ENOBUFS;
575 goto out;
576 }
577
578 rt = addrconf_dst_alloc(idev, addr, 0);
579 if (IS_ERR(rt)) {
580 err = PTR_ERR(rt);
581 goto out;
582 }
583
1da177e4
LT		 584 ipv6_addr_copy(&ifa->addr, addr);
585
586 spin_lock_init(&ifa->lock);
587 init_timer(&ifa->timer);
588 ifa->timer.data = (unsigned long) ifa;
589 ifa->scope = scope;
590 ifa->prefix_len = pfxlen;
591 ifa->flags = flags | IFA_F_TENTATIVE;
592 ifa->cstamp = ifa->tstamp = jiffies;
593
57f5f544
KF		 594 ifa->rt = rt;
595
95c385b4
NH		 596 /*
597 * part one of RFC 4429, section 3.3
598 * We should not configure an address as
599 * optimistic if we do not yet know the link
600 * layer address of our nexhop router
601 */
602
603 if (rt->rt6i_nexthop == NULL)
604 ifa->flags &= ~IFA_F_OPTIMISTIC;
605
1da177e4
LT		 606 ifa->idev = idev;
607 in6_dev_hold(idev);
608 /* For caller */
609 in6_ifa_hold(ifa);
610
611 /* Add to big hash table */
612 hash = ipv6_addr_hash(addr);
613
614 ifa->lst_next = inet6_addr_lst[hash];
615 inet6_addr_lst[hash] = ifa;
616 in6_ifa_hold(ifa);
617 write_unlock(&addrconf_hash_lock);
618
619 write_lock(&idev->lock);
620 /* Add to inet6_dev unicast addr list. */
e55ffac6 621 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 622
623#ifdef CONFIG_IPV6_PRIVACY
624 if (ifa->flags&IFA_F_TEMPORARY) {
625 ifa->tmp_next = idev->tempaddr_list;
626 idev->tempaddr_list = ifa;
627 in6_ifa_hold(ifa);
628 }
629#endif
630
1da177e4
LT		 631 in6_ifa_hold(ifa);
632 write_unlock(&idev->lock);
633out2:
8814c4b5 634 rcu_read_unlock_bh();
1da177e4 635
fd92833a 636 if (likely(err == 0))
e041c683 637 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 638 else {
639 kfree(ifa);
640 ifa = ERR_PTR(err);
641 }
642
643 return ifa;
644out:
645 write_unlock(&addrconf_hash_lock);
646 goto out2;
647}
648
649/* This function wants to get referenced ifp and releases it before return */
650
651static void ipv6_del_addr(struct inet6_ifaddr *ifp)
652{
653 struct inet6_ifaddr *ifa, **ifap;
654 struct inet6_dev *idev = ifp->idev;
655 int hash;
656 int deleted = 0, onlink = 0;
657 unsigned long expires = jiffies;
658
659 hash = ipv6_addr_hash(&ifp->addr);
660
661 ifp->dead = 1;
662
663 write_lock_bh(&addrconf_hash_lock);
664 for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
665 ifap = &ifa->lst_next) {
666 if (ifa == ifp) {
667 *ifap = ifa->lst_next;
668 __in6_ifa_put(ifp);
669 ifa->lst_next = NULL;
670 break;
671 }
672 }
673 write_unlock_bh(&addrconf_hash_lock);
674
675 write_lock_bh(&idev->lock);
676#ifdef CONFIG_IPV6_PRIVACY
677 if (ifp->flags&IFA_F_TEMPORARY) {
678 for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
679 ifap = &ifa->tmp_next) {
680 if (ifa == ifp) {
681 *ifap = ifa->tmp_next;
682 if (ifp->ifpub) {
683 in6_ifa_put(ifp->ifpub);
684 ifp->ifpub = NULL;
685 }
686 __in6_ifa_put(ifp);
687 ifa->tmp_next = NULL;
688 break;
689 }
690 }
691 }
692#endif
693
1d142804 694 for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
1da177e4
LT		 695 if (ifa == ifp) {
696 *ifap = ifa->if_next;
697 __in6_ifa_put(ifp);
698 ifa->if_next = NULL;
699 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
700 break;
701 deleted = 1;
1d142804 702 continue;
1da177e4
LT		 703 } else if (ifp->flags & IFA_F_PERMANENT) {
704 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
705 ifp->prefix_len)) {
706 if (ifa->flags & IFA_F_PERMANENT) {
707 onlink = 1;
708 if (deleted)
709 break;
710 } else {
711 unsigned long lifetime;
712
713 if (!onlink)
714 onlink = -1;
715
716 spin_lock(&ifa->lock);
717 lifetime = min_t(unsigned long,
718 ifa->valid_lft, 0x7fffffffUL/HZ);
719 if (time_before(expires,
720 ifa->tstamp + lifetime * HZ))
721 expires = ifa->tstamp + lifetime * HZ;
722 spin_unlock(&ifa->lock);
723 }
724 }
725 }
1d142804 726 ifap = &ifa->if_next;
1da177e4
LT		 727 }
728 write_unlock_bh(&idev->lock);
729
730 ipv6_ifa_notify(RTM_DELADDR, ifp);
731
e041c683 732 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4
LT		 733
734 addrconf_del_timer(ifp);
735
736 /*
737 * Purge or update corresponding prefix
738 *
739 * 1) we don't purge prefix here if address was not permanent.
740 * prefix is managed by its own lifetime.
741 * 2) if there're no addresses, delete prefix.
742 * 3) if there're still other permanent address(es),
743 * corresponding prefix is still permanent.
744 * 4) otherwise, update prefix lifetime to the
745 * longest valid lifetime among the corresponding
746 * addresses on the device.
747 * Note: subsequent RA will update lifetime.
748 *
749 * --yoshfuji
750 */
751 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
752 struct in6_addr prefix;
753 struct rt6_info *rt;
6fda7350 754 struct net *net = ifp->idev->dev->nd_net;
1da177e4 755 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 756 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4
LT		 757
758 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
759 if (onlink == 0) {
e0a1ad73 760 ip6_del_rt(rt);
1da177e4
LT		 761 rt = NULL;
762 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
763 rt->rt6i_expires = expires;
764 rt->rt6i_flags |= RTF_EXPIRES;
765 }
766 }
767 dst_release(&rt->u.dst);
768 }
769
770 in6_ifa_put(ifp);
771}
772
773#ifdef CONFIG_IPV6_PRIVACY
774static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
775{
776 struct inet6_dev *idev = ifp->idev;
777 struct in6_addr addr, *tmpaddr;
778 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
779 int tmp_plen;
780 int ret = 0;
781 int max_addresses;
95c385b4 782 u32 addr_flags;
1da177e4
LT		 783
784 write_lock(&idev->lock);
785 if (ift) {
786 spin_lock_bh(&ift->lock);
787 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
788 spin_unlock_bh(&ift->lock);
789 tmpaddr = &addr;
790 } else {
791 tmpaddr = NULL;
792 }
793retry:
794 in6_dev_hold(idev);
795 if (idev->cnf.use_tempaddr <= 0) {
796 write_unlock(&idev->lock);
797 printk(KERN_INFO
798 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
799 in6_dev_put(idev);
800 ret = -1;
801 goto out;
802 }
803 spin_lock_bh(&ifp->lock);
804 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
805 idev->cnf.use_tempaddr = -1; /*XXX*/
806 spin_unlock_bh(&ifp->lock);
807 write_unlock(&idev->lock);
808 printk(KERN_WARNING
809 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
810 in6_dev_put(idev);
811 ret = -1;
812 goto out;
813 }
814 in6_ifa_hold(ifp);
815 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
816 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
817 spin_unlock_bh(&ifp->lock);
818 write_unlock(&idev->lock);
819 printk(KERN_WARNING
820 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
821 in6_ifa_put(ifp);
822 in6_dev_put(idev);
823 ret = -1;
824 goto out;
825 }
826 memcpy(&addr.s6_addr[8], idev->rndid, 8);
827 tmp_valid_lft = min_t(__u32,
828 ifp->valid_lft,
829 idev->cnf.temp_valid_lft);
1ab1457c
YH		 830 tmp_prefered_lft = min_t(__u32,
831 ifp->prefered_lft,
1da177e4
LT		 832 idev->cnf.temp_prefered_lft - desync_factor / HZ);
833 tmp_plen = ifp->prefix_len;
834 max_addresses = idev->cnf.max_addresses;
835 tmp_cstamp = ifp->cstamp;
836 tmp_tstamp = ifp->tstamp;
837 spin_unlock_bh(&ifp->lock);
838
839 write_unlock(&idev->lock);
95c385b4
NH		 840
841 addr_flags = IFA_F_TEMPORARY;
842 /* set in addrconf_prefix_rcv() */
843 if (ifp->flags & IFA_F_OPTIMISTIC)
844 addr_flags |= IFA_F_OPTIMISTIC;
845
1da177e4 846 ift = !max_addresses ||
1ab1457c 847 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 848 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 849 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
850 addr_flags) : NULL;
1da177e4
LT		 851 if (!ift || IS_ERR(ift)) {
852 in6_ifa_put(ifp);
853 in6_dev_put(idev);
854 printk(KERN_INFO
855 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
856 tmpaddr = &addr;
857 write_lock(&idev->lock);
858 goto retry;
859 }
860
861 spin_lock_bh(&ift->lock);
862 ift->ifpub = ifp;
863 ift->valid_lft = tmp_valid_lft;
864 ift->prefered_lft = tmp_prefered_lft;
865 ift->cstamp = tmp_cstamp;
866 ift->tstamp = tmp_tstamp;
867 spin_unlock_bh(&ift->lock);
868
869 addrconf_dad_start(ift, 0);
870 in6_ifa_put(ift);
871 in6_dev_put(idev);
872out:
873 return ret;
874}
875#endif
876
877/*
072047e4 878 * Choose an appropriate source address (RFC3484)
1da177e4 879 */
072047e4
YH		 880struct ipv6_saddr_score {
881 int addr_type;
882 unsigned int attrs;
883 int matchlen;
0d27b427 884 int scope;
072047e4
YH		 885 unsigned int rule;
886};
887
888#define IPV6_SADDR_SCORE_LOCAL 0x0001
889#define IPV6_SADDR_SCORE_PREFERRED 0x0004
890#define IPV6_SADDR_SCORE_HOA 0x0008
891#define IPV6_SADDR_SCORE_OIF 0x0010
892#define IPV6_SADDR_SCORE_LABEL 0x0020
893#define IPV6_SADDR_SCORE_PRIVACY 0x0040
894
b6f99a21 895static inline int ipv6_saddr_preferred(int type)
1da177e4 896{
072047e4
YH		 897 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
898 IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
899 return 1;
900 return 0;
1da177e4
LT		 901}
902
072047e4 903int ipv6_dev_get_saddr(struct net_device *daddr_dev,
1da177e4
LT		 904 struct in6_addr *daddr, struct in6_addr *saddr)
905{
072047e4
YH		 906 struct ipv6_saddr_score hiscore;
907 struct inet6_ifaddr *ifa_result = NULL;
6fda7350 908 struct net *net = daddr_dev->nd_net;
072047e4
YH		 909 int daddr_type = __ipv6_addr_type(daddr);
910 int daddr_scope = __ipv6_addr_src_scope(daddr_type);
303065a8
YH		 911 int daddr_ifindex = daddr_dev ? daddr_dev->ifindex : 0;
912 u32 daddr_label = ipv6_addr_label(daddr, daddr_type, daddr_ifindex);
072047e4 913 struct net_device *dev;
1da177e4 914
072047e4 915 memset(&hiscore, 0, sizeof(hiscore));
1da177e4 916
072047e4 917 read_lock(&dev_base_lock);
8814c4b5 918 rcu_read_lock();
1da177e4 919
6fda7350 920 for_each_netdev(net, dev) {
072047e4
YH		 921 struct inet6_dev *idev;
922 struct inet6_ifaddr *ifa;
923
924 /* Rule 0: Candidate Source Address (section 4)
925 * - multicast and link-local destination address,
926 * the set of candidate source address MUST only
927 * include addresses assigned to interfaces
928 * belonging to the same link as the outgoing
929 * interface.
930 * (- For site-local destination addresses, the
931 * set of candidate source addresses MUST only
932 * include addresses assigned to interfaces
933 * belonging to the same site as the outgoing
934 * interface.)
935 */
936 if ((daddr_type & IPV6_ADDR_MULTICAST ||
937 daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
938 daddr_dev && dev != daddr_dev)
939 continue;
1da177e4 940
1da177e4 941 idev = __in6_dev_get(dev);
072047e4
YH		 942 if (!idev)
943 continue;
944
945 read_lock_bh(&idev->lock);
946 for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
947 struct ipv6_saddr_score score;
948
949 score.addr_type = __ipv6_addr_type(&ifa->addr);
950
6b3ae80a
YH		 951 /* Rule 0:
952 * - Tentative Address (RFC2462 section 5.4)
953 * - A tentative address is not considered
954 * "assigned to an interface" in the traditional
95c385b4 955 * sense, unless it is also flagged as optimistic.
6b3ae80a 956 * - Candidate Source Address (section 4)
072047e4
YH		 957 * - In any case, anycast addresses, multicast
958 * addresses, and the unspecified address MUST
959 * NOT be included in a candidate set.
960 */
95c385b4
NH		 961 if ((ifa->flags & IFA_F_TENTATIVE) &&
962 (!(ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 963 continue;
072047e4
YH		 964 if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
965 score.addr_type & IPV6_ADDR_MULTICAST)) {
966 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 967 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 968 "assigned as unicast address on %s",
969 dev->name);
970 continue;
971 }
972
973 score.attrs = 0;
974 score.matchlen = 0;
975 score.scope = 0;
976 score.rule = 0;
977
978 if (ifa_result == NULL) {
979 /* record it if the first available entry */
980 goto record_it;
981 }
982
983 /* Rule 1: Prefer same address */
984 if (hiscore.rule < 1) {
985 if (ipv6_addr_equal(&ifa_result->addr, daddr))
986 hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
987 hiscore.rule++;
988 }
989 if (ipv6_addr_equal(&ifa->addr, daddr)) {
990 score.attrs |= IPV6_SADDR_SCORE_LOCAL;
991 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
992 score.rule = 1;
993 goto record_it;
1da177e4 994 }
072047e4
YH		 995 } else {
996 if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
997 continue;
1da177e4 998 }
1da177e4 999
072047e4
YH		 1000 /* Rule 2: Prefer appropriate scope */
1001 if (hiscore.rule < 2) {
1002 hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
1003 hiscore.rule++;
1004 }
1005 score.scope = __ipv6_addr_src_scope(score.addr_type);
1006 if (hiscore.scope < score.scope) {
1007 if (hiscore.scope < daddr_scope) {
1008 score.rule = 2;
1009 goto record_it;
1010 } else
1011 continue;
1012 } else if (score.scope < hiscore.scope) {
1013 if (score.scope < daddr_scope)
e55ffac6 1014 break; /* addresses sorted by scope */
072047e4
YH		 1015 else {
1016 score.rule = 2;
1017 goto record_it;
1018 }
1019 }
1da177e4 1020
95c385b4 1021 /* Rule 3: Avoid deprecated and optimistic addresses */
072047e4
YH		 1022 if (hiscore.rule < 3) {
1023 if (ipv6_saddr_preferred(hiscore.addr_type) ||
95c385b4
NH		 1024 (((ifa_result->flags &
1025 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
072047e4
YH		 1026 hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1027 hiscore.rule++;
1028 }
1029 if (ipv6_saddr_preferred(score.addr_type) ||
6ae5f983 1030 (((ifa->flags &
95c385b4 1031 (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
072047e4
YH		 1032 score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
1033 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
1034 score.rule = 3;
1035 goto record_it;
1036 }
1037 } else {
1038 if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
1039 continue;
1040 }
1da177e4 1041
3b9f9a1c 1042 /* Rule 4: Prefer home address */
59fbb3a6 1043#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c
NT		 1044 if (hiscore.rule < 4) {
1045 if (ifa_result->flags & IFA_F_HOMEADDRESS)
1046 hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
1047 hiscore.rule++;
1048 }
1049 if (ifa->flags & IFA_F_HOMEADDRESS) {
1050 score.attrs |= IPV6_SADDR_SCORE_HOA;
1051 if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
1052 score.rule = 4;
1053 goto record_it;
1054 }
1055 } else {
1056 if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
1057 continue;
1058 }
1059#else
220bbd74
YH		 1060 if (hiscore.rule < 4)
1061 hiscore.rule++;
3b9f9a1c 1062#endif
072047e4
YH		 1063
1064 /* Rule 5: Prefer outgoing interface */
1065 if (hiscore.rule < 5) {
1066 if (daddr_dev == NULL ||
1067 daddr_dev == ifa_result->idev->dev)
1068 hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
1069 hiscore.rule++;
1070 }
1071 if (daddr_dev == NULL ||
1072 daddr_dev == ifa->idev->dev) {
1073 score.attrs |= IPV6_SADDR_SCORE_OIF;
1074 if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
1075 score.rule = 5;
1076 goto record_it;
1077 }
1078 } else {
1079 if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
1080 continue;
1081 }
1082
1083 /* Rule 6: Prefer matching label */
1084 if (hiscore.rule < 6) {
c1ee656c 1085 if (ipv6_addr_label(&ifa_result->addr,
303065a8
YH		 1086 hiscore.addr_type,
1087 ifa_result->idev->dev->ifindex) == daddr_label)
072047e4
YH		 1088 hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
1089 hiscore.rule++;
1090 }
c1ee656c 1091 if (ipv6_addr_label(&ifa->addr,
303065a8
YH		 1092 score.addr_type,
1093 ifa->idev->dev->ifindex) == daddr_label) {
072047e4
YH		 1094 score.attrs |= IPV6_SADDR_SCORE_LABEL;
1095 if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
1096 score.rule = 6;
1097 goto record_it;
1da177e4 1098 }
072047e4
YH		 1099 } else {
1100 if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
1101 continue;
1102 }
1103
44fd0261 1104#ifdef CONFIG_IPV6_PRIVACY
072047e4
YH		 1105 /* Rule 7: Prefer public address
1106 * Note: prefer temprary address if use_tempaddr >= 2
1107 */
1108 if (hiscore.rule < 7) {
1109 if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
1110 (ifa_result->idev->cnf.use_tempaddr >= 2))
1111 hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1112 hiscore.rule++;
1113 }
1114 if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
1115 (ifa->idev->cnf.use_tempaddr >= 2)) {
1116 score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
1117 if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
1118 score.rule = 7;
1119 goto record_it;
1120 }
1121 } else {
1122 if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
1123 continue;
1124 }
5e2707fa
YH		 1125#else
1126 if (hiscore.rule < 7)
1127 hiscore.rule++;
44fd0261 1128#endif
99cd07a5
JMT		 1129
1130 /* Skip rule 8 for orchid -> non-orchid address pairs. */
1131 if (ipv6_addr_orchid(&ifa->addr) && !ipv6_addr_orchid(daddr))
1132 continue;
1133
072047e4 1134 /* Rule 8: Use longest matching prefix */
12da2a43 1135 if (hiscore.rule < 8) {
072047e4 1136 hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
12da2a43
YZ		 1137 hiscore.rule++;
1138 }
072047e4
YH		 1139 score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
1140 if (score.matchlen > hiscore.matchlen) {
1141 score.rule = 8;
1142 goto record_it;
1da177e4 1143 }
072047e4
YH		 1144#if 0
1145 else if (score.matchlen < hiscore.matchlen)
1146 continue;
1147#endif
1148
1149 /* Final Rule: choose first available one */
1150 continue;
1151record_it:
1152 if (ifa_result)
1153 in6_ifa_put(ifa_result);
1154 in6_ifa_hold(ifa);
1155 ifa_result = ifa;
1156 hiscore = score;
1da177e4 1157 }
072047e4 1158 read_unlock_bh(&idev->lock);
1da177e4 1159 }
8814c4b5 1160 rcu_read_unlock();
1da177e4
LT		 1161 read_unlock(&dev_base_lock);
1162
072047e4
YH		 1163 if (!ifa_result)
1164 return -EADDRNOTAVAIL;
1ab1457c 1165
072047e4
YH		 1166 ipv6_addr_copy(saddr, &ifa_result->addr);
1167 in6_ifa_put(ifa_result);
1168 return 0;
1da177e4
LT		 1169}
1170
5e5f3f0f 1171EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1172
95c385b4
NH		 1173int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1174 unsigned char banned_flags)
1da177e4
LT		 1175{
1176 struct inet6_dev *idev;
1177 int err = -EADDRNOTAVAIL;
1178
8814c4b5 1179 rcu_read_lock();
1da177e4
LT		 1180 if ((idev = __in6_dev_get(dev)) != NULL) {
1181 struct inet6_ifaddr *ifp;
1182
1183 read_lock_bh(&idev->lock);
1184 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
95c385b4 1185 if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
1da177e4
LT		 1186 ipv6_addr_copy(addr, &ifp->addr);
1187 err = 0;
1188 break;
1189 }
1190 }
1191 read_unlock_bh(&idev->lock);
1192 }
8814c4b5 1193 rcu_read_unlock();
1da177e4
LT		 1194 return err;
1195}
1196
1197static int ipv6_count_addresses(struct inet6_dev *idev)
1198{
1199 int cnt = 0;
1200 struct inet6_ifaddr *ifp;
1201
1202 read_lock_bh(&idev->lock);
1203 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
1204 cnt++;
1205 read_unlock_bh(&idev->lock);
1206 return cnt;
1207}
1208
bfeade08
DL		 1209int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1210 struct net_device *dev, int strict)
1da177e4
LT		 1211{
1212 struct inet6_ifaddr * ifp;
1213 u8 hash = ipv6_addr_hash(addr);
1214
1215 read_lock_bh(&addrconf_hash_lock);
1216 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
bfeade08
DL		 1217 if (ifp->idev->dev->nd_net != net)
1218 continue;
1da177e4
LT		 1219 if (ipv6_addr_equal(&ifp->addr, addr) &&
1220 !(ifp->flags&IFA_F_TENTATIVE)) {
1221 if (dev == NULL || ifp->idev->dev == dev ||
1222 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
1223 break;
1224 }
1225 }
1226 read_unlock_bh(&addrconf_hash_lock);
1227 return ifp != NULL;
1228}
7159039a
YH		 1229EXPORT_SYMBOL(ipv6_chk_addr);
1230
1da177e4 1231static
06bfe655
DL		 1232int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1233 struct net_device *dev)
1da177e4
LT		 1234{
1235 struct inet6_ifaddr * ifp;
1236 u8 hash = ipv6_addr_hash(addr);
1237
1238 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
06bfe655
DL		 1239 if (ifp->idev->dev->nd_net != net)
1240 continue;
1da177e4
LT		 1241 if (ipv6_addr_equal(&ifp->addr, addr)) {
1242 if (dev == NULL || ifp->idev->dev == dev)
1243 break;
1244 }
1245 }
1246 return ifp != NULL;
1247}
1248
1cab3da6
DL		 1249struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, struct in6_addr *addr,
1250 struct net_device *dev, int strict)
1da177e4
LT		 1251{
1252 struct inet6_ifaddr * ifp;
1253 u8 hash = ipv6_addr_hash(addr);
1254
1255 read_lock_bh(&addrconf_hash_lock);
1256 for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
1cab3da6
DL		 1257 if (ifp->idev->dev->nd_net != net)
1258 continue;
1da177e4
LT		 1259 if (ipv6_addr_equal(&ifp->addr, addr)) {
1260 if (dev == NULL || ifp->idev->dev == dev ||
1261 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1262 in6_ifa_hold(ifp);
1263 break;
1264 }
1265 }
1266 }
1267 read_unlock_bh(&addrconf_hash_lock);
1268
1269 return ifp;
1270}
1271
1272int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
1273{
1274 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
0fa1a53e 1275 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
82103232
AV		 1276 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
1277 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
1da177e4 1278 int sk_ipv6only = ipv6_only_sock(sk);
463c84b9 1279 int sk2_ipv6only = inet_v6_ipv6only(sk2);
1da177e4
LT		 1280 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
1281 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
1282
1283 if (!sk2_rcv_saddr && !sk_ipv6only)
1284 return 1;
1285
1286 if (addr_type2 == IPV6_ADDR_ANY &&
1287 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
1288 return 1;
1289
1290 if (addr_type == IPV6_ADDR_ANY &&
1291 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
1292 return 1;
1293
1294 if (sk2_rcv_saddr6 &&
1295 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
1296 return 1;
1297
1298 if (addr_type == IPV6_ADDR_MAPPED &&
1299 !sk2_ipv6only &&
1300 (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
1301 return 1;
1302
1303 return 0;
1304}
1305
1306/* Gets referenced address, destroys ifaddr */
1307
9f5336e2 1308static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
1da177e4 1309{
1da177e4
LT		 1310 if (ifp->flags&IFA_F_PERMANENT) {
1311 spin_lock_bh(&ifp->lock);
1312 addrconf_del_timer(ifp);
1313 ifp->flags |= IFA_F_TENTATIVE;
1314 spin_unlock_bh(&ifp->lock);
1315 in6_ifa_put(ifp);
1316#ifdef CONFIG_IPV6_PRIVACY
1317 } else if (ifp->flags&IFA_F_TEMPORARY) {
1318 struct inet6_ifaddr *ifpub;
1319 spin_lock_bh(&ifp->lock);
1320 ifpub = ifp->ifpub;
1321 if (ifpub) {
1322 in6_ifa_hold(ifpub);
1323 spin_unlock_bh(&ifp->lock);
1324 ipv6_create_tempaddr(ifpub, ifp);
1325 in6_ifa_put(ifpub);
1326 } else {
1327 spin_unlock_bh(&ifp->lock);
1328 }
1329 ipv6_del_addr(ifp);
1330#endif
1331 } else
1332 ipv6_del_addr(ifp);
1333}
1334
3c21edbd
YH		 1335void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1336{
1337 if (net_ratelimit())
1338 printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
1339 addrconf_dad_stop(ifp);
1340}
1da177e4
LT		 1341
1342/* Join to solicited addr multicast group. */
1343
1344void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1345{
1346 struct in6_addr maddr;
1347
1348 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1349 return;
1350
1351 addrconf_addr_solict_mult(addr, &maddr);
1352 ipv6_dev_mc_inc(dev, &maddr);
1353}
1354
1355void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1356{
1357 struct in6_addr maddr;
1358
1359 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1360 return;
1361
1362 addrconf_addr_solict_mult(addr, &maddr);
1363 __ipv6_dev_mc_dec(idev, &maddr);
1364}
1365
20380731 1366static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1367{
1368 struct in6_addr addr;
1369 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1370 if (ipv6_addr_any(&addr))
1371 return;
1372 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1373}
1374
20380731 1375static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1376{
1377 struct in6_addr addr;
1378 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1379 if (ipv6_addr_any(&addr))
1380 return;
1381 __ipv6_dev_ac_dec(ifp->idev, &addr);
1382}
1383
073a8e0e
YH		 1384static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1385{
1386 if (dev->addr_len != ETH_ALEN)
1387 return -1;
1388 memcpy(eui, dev->dev_addr, 3);
1389 memcpy(eui + 5, dev->dev_addr + 3, 3);
1390
1391 /*
1392 * The zSeries OSA network cards can be shared among various
1393 * OS instances, but the OSA cards have only one MAC address.
1394 * This leads to duplicate address conflicts in conjunction
1395 * with IPv6 if more than one instance uses the same card.
1396 *
1397 * The driver for these cards can deliver a unique 16-bit
1398 * identifier for each instance sharing the same card. It is
1399 * placed instead of 0xFFFE in the interface identifier. The
1400 * "u" bit of the interface identifier is not inverted in this
1401 * case. Hence the resulting interface identifier has local
1402 * scope according to RFC2373.
1403 */
1404 if (dev->dev_id) {
1405 eui[3] = (dev->dev_id >> 8) & 0xFF;
1406 eui[4] = dev->dev_id & 0xFF;
1407 } else {
1408 eui[3] = 0xFF;
1409 eui[4] = 0xFE;
1410 eui[0] ^= 2;
1411 }
1412 return 0;
1413}
1414
1415static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1416{
1417 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1418 if (dev->addr_len != ARCNET_ALEN)
1419 return -1;
1420 memset(eui, 0, 7);
1421 eui[7] = *(u8*)dev->dev_addr;
1422 return 0;
1423}
1424
1425static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1426{
1427 if (dev->addr_len != INFINIBAND_ALEN)
1428 return -1;
1429 memcpy(eui, dev->dev_addr + 12, 8);
1430 eui[0] |= 2;
1431 return 0;
1432}
1433
1da177e4
LT		 1434static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1435{
1436 switch (dev->type) {
1437 case ARPHRD_ETHER:
1438 case ARPHRD_FDDI:
1439 case ARPHRD_IEEE802_TR:
073a8e0e 1440 return addrconf_ifid_eui48(eui, dev);
1da177e4 1441 case ARPHRD_ARCNET:
073a8e0e 1442 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1443 case ARPHRD_INFINIBAND:
073a8e0e 1444 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0
FT		 1445 case ARPHRD_SIT:
1446 if (dev->priv_flags & IFF_ISATAP)
1447 return ipv6_isatap_eui64(eui, *(__be32 *)dev->dev_addr);
1da177e4
LT		 1448 }
1449 return -1;
1450}
1451
1452static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1453{
1454 int err = -1;
1455 struct inet6_ifaddr *ifp;
1456
1457 read_lock_bh(&idev->lock);
1458 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1459 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1460 memcpy(eui, ifp->addr.s6_addr+8, 8);
1461 err = 0;
1462 break;
1463 }
1464 }
1465 read_unlock_bh(&idev->lock);
1466 return err;
1467}
1468
1469#ifdef CONFIG_IPV6_PRIVACY
1470/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1471static int __ipv6_regen_rndid(struct inet6_dev *idev)
1472{
1da177e4 1473regen:
955189ef 1474 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1475 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1476
1477 /*
1478 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1479 * check if generated address is not inappropriate
1480 *
1481 * - Reserved subnet anycast (RFC 2526)
1482 * 11111101 11....11 1xxxxxxx
c7dc89c0 1483 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1484 * 00-00-5E-FE-xx-xx-xx-xx
1485 * - value 0
1486 * - XXX: already assigned to an address on the device
1487 */
1ab1457c 1488 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1489 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1490 (idev->rndid[7]&0x80))
1491 goto regen;
1492 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1493 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1494 goto regen;
1495 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1496 goto regen;
1497 }
1498
1499 return 0;
1500}
1501
1502static void ipv6_regen_rndid(unsigned long data)
1503{
1504 struct inet6_dev *idev = (struct inet6_dev *) data;
1505 unsigned long expires;
1506
8814c4b5 1507 rcu_read_lock_bh();
1da177e4
LT		 1508 write_lock_bh(&idev->lock);
1509
1510 if (idev->dead)
1511 goto out;
1512
1513 if (__ipv6_regen_rndid(idev) < 0)
1514 goto out;
1ab1457c 1515
1da177e4 1516 expires = jiffies +
1ab1457c 1517 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1518 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1519 if (time_before(expires, jiffies)) {
1520 printk(KERN_WARNING
1521 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1522 idev->dev->name);
1523 goto out;
1524 }
1525
1526 if (!mod_timer(&idev->regen_timer, expires))
1527 in6_dev_hold(idev);
1528
1529out:
1530 write_unlock_bh(&idev->lock);
8814c4b5 1531 rcu_read_unlock_bh();
1da177e4
LT		 1532 in6_dev_put(idev);
1533}
1534
1535static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1536 int ret = 0;
1537
1538 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1539 ret = __ipv6_regen_rndid(idev);
1540 return ret;
1541}
1542#endif
1543
1544/*
1545 * Add prefix route.
1546 */
1547
1548static void
1549addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1550 unsigned long expires, u32 flags)
1da177e4 1551{
86872cb5
TG		 1552 struct fib6_config cfg = {
1553 .fc_table = RT6_TABLE_PREFIX,
1554 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1555 .fc_ifindex = dev->ifindex,
1556 .fc_expires = expires,
1557 .fc_dst_len = plen,
1558 .fc_flags = RTF_UP | flags,
6fda7350 1559 .fc_nlinfo.nl_net = dev->nd_net,
86872cb5 1560 };
1da177e4 1561
86872cb5 1562 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1563
1564 /* Prevent useless cloning on PtP SIT.
1565 This thing is done here expecting that the whole
1566 class of non-broadcast devices need not cloning.
1567 */
0be669bb 1568#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1569 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1570 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1571#endif
1da177e4 1572
86872cb5 1573 ip6_route_add(&cfg);
1da177e4
LT		 1574}
1575
1576/* Create "default" multicast route to the interface */
1577
1578static void addrconf_add_mroute(struct net_device *dev)
1579{
86872cb5
TG		 1580 struct fib6_config cfg = {
1581 .fc_table = RT6_TABLE_LOCAL,
1582 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1583 .fc_ifindex = dev->ifindex,
1584 .fc_dst_len = 8,
1585 .fc_flags = RTF_UP,
6fda7350 1586 .fc_nlinfo.nl_net = dev->nd_net,
86872cb5
TG		 1587 };
1588
1589 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1590
1591 ip6_route_add(&cfg);
1da177e4
LT		 1592}
1593
0be669bb 1594#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1595static void sit_route_add(struct net_device *dev)
1596{
86872cb5
TG		 1597 struct fib6_config cfg = {
1598 .fc_table = RT6_TABLE_MAIN,
1599 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1600 .fc_ifindex = dev->ifindex,
1601 .fc_dst_len = 96,
1602 .fc_flags = RTF_UP | RTF_NONEXTHOP,
6fda7350 1603 .fc_nlinfo.nl_net = dev->nd_net,
86872cb5 1604 };
1da177e4
LT		 1605
1606 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1607 ip6_route_add(&cfg);
1da177e4 1608}
0be669bb 1609#endif
1da177e4
LT		 1610
1611static void addrconf_add_lroute(struct net_device *dev)
1612{
1613 struct in6_addr addr;
1614
1615 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1616 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1617}
1618
1619static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1620{
1621 struct inet6_dev *idev;
1622
1623 ASSERT_RTNL();
1624
1625 if ((idev = ipv6_find_idev(dev)) == NULL)
1626 return NULL;
1627
1628 /* Add default multicast route */
1629 addrconf_add_mroute(dev);
1630
1631 /* Add link local route */
1632 addrconf_add_lroute(dev);
1633 return idev;
1634}
1635
1636void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1637{
1638 struct prefix_info *pinfo;
1639 __u32 valid_lft;
1640 __u32 prefered_lft;
1641 int addr_type;
1642 unsigned long rt_expires;
1643 struct inet6_dev *in6_dev;
1644
1645 pinfo = (struct prefix_info *) opt;
1ab1457c 1646
1da177e4
LT		 1647 if (len < sizeof(struct prefix_info)) {
1648 ADBG(("addrconf: prefix option too short\n"));
1649 return;
1650 }
1ab1457c 1651
1da177e4
LT		 1652 /*
1653 * Validation checks ([ADDRCONF], page 19)
1654 */
1655
1656 addr_type = ipv6_addr_type(&pinfo->prefix);
1657
1658 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1659 return;
1660
1661 valid_lft = ntohl(pinfo->valid);
1662 prefered_lft = ntohl(pinfo->prefered);
1663
1664 if (prefered_lft > valid_lft) {
1665 if (net_ratelimit())
1666 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1667 return;
1668 }
1669
1670 in6_dev = in6_dev_get(dev);
1671
1672 if (in6_dev == NULL) {
1673 if (net_ratelimit())
1674 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1675 return;
1676 }
1677
1678 /*
1679 * Two things going on here:
1680 * 1) Add routes for on-link prefixes
1681 * 2) Configure prefixes with the auto flag set
1682 */
1683
1684 /* Avoid arithmetic overflow. Really, we could
1685 save rt_expires in seconds, likely valid_lft,
1686 but it would require division in fib gc, that it
1687 not good.
1688 */
1689 if (valid_lft >= 0x7FFFFFFF/HZ)
3dd4bc68 1690 rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
1da177e4 1691 else
3dd4bc68
YH		 1692 rt_expires = valid_lft * HZ;
1693
1694 /*
1695 * We convert this (in jiffies) to clock_t later.
1696 * Avoid arithmetic overflow there as well.
1697 * Overflow can happen only if HZ < USER_HZ.
1698 */
1699 if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
1700 rt_expires = 0x7FFFFFFF / USER_HZ;
1da177e4
LT		 1701
1702 if (pinfo->onlink) {
1703 struct rt6_info *rt;
6fda7350
BT		 1704 rt = rt6_lookup(dev->nd_net, &pinfo->prefix, NULL,
1705 dev->ifindex, 1);
1da177e4
LT		 1706
1707 if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
1708 if (rt->rt6i_flags&RTF_EXPIRES) {
1709 if (valid_lft == 0) {
e0a1ad73 1710 ip6_del_rt(rt);
1da177e4
LT		 1711 rt = NULL;
1712 } else {
3dd4bc68 1713 rt->rt6i_expires = jiffies + rt_expires;
1da177e4
LT		 1714 }
1715 }
1716 } else if (valid_lft) {
1717 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
3dd4bc68 1718 dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
1da177e4
LT		 1719 }
1720 if (rt)
1721 dst_release(&rt->u.dst);
1722 }
1723
1724 /* Try to figure out our local address for this prefix */
1725
1726 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1727 struct inet6_ifaddr * ifp;
1728 struct in6_addr addr;
1729 int create = 0, update_lft = 0;
1730
1731 if (pinfo->prefix_len == 64) {
1732 memcpy(&addr, &pinfo->prefix, 8);
1733 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1734 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1735 in6_dev_put(in6_dev);
1736 return;
1737 }
1738 goto ok;
1739 }
1740 if (net_ratelimit())
1741 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1742 pinfo->prefix_len);
1743 in6_dev_put(in6_dev);
1744 return;
1745
1746ok:
1747
6fda7350 1748 ifp = ipv6_get_ifaddr(dev->nd_net, &addr, dev, 1);
1da177e4
LT		 1749
1750 if (ifp == NULL && valid_lft) {
1751 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1752 u32 addr_flags = 0;
1753
1754#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1755 if (in6_dev->cnf.optimistic_dad &&
1756 !ipv6_devconf.forwarding)
1757 addr_flags = IFA_F_OPTIMISTIC;
1758#endif
1da177e4
LT		 1759
1760 /* Do not allow to create too much of autoconfigured
1761 * addresses; this would be too easy way to crash kernel.
1762 */
1763 if (!max_addresses ||
1764 ipv6_count_addresses(in6_dev) < max_addresses)
1765 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1766 addr_type&IPV6_ADDR_SCOPE_MASK,
1767 addr_flags);
1da177e4
LT		 1768
1769 if (!ifp || IS_ERR(ifp)) {
1770 in6_dev_put(in6_dev);
1771 return;
1772 }
1773
1774 update_lft = create = 1;
1775 ifp->cstamp = jiffies;
1776 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1777 }
1778
1779 if (ifp) {
1780 int flags;
1781 unsigned long now;
1782#ifdef CONFIG_IPV6_PRIVACY
1783 struct inet6_ifaddr *ift;
1784#endif
1785 u32 stored_lft;
1786
1787 /* update lifetime (RFC2462 5.5.3 e) */
1788 spin_lock(&ifp->lock);
1789 now = jiffies;
1790 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1791 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1792 else
1793 stored_lft = 0;
1794 if (!update_lft && stored_lft) {
1795 if (valid_lft > MIN_VALID_LIFETIME ||
1796 valid_lft > stored_lft)
1797 update_lft = 1;
1798 else if (stored_lft <= MIN_VALID_LIFETIME) {
1799 /* valid_lft <= stored_lft is always true */
1800 /* XXX: IPsec */
1801 update_lft = 0;
1802 } else {
1803 valid_lft = MIN_VALID_LIFETIME;
1804 if (valid_lft < prefered_lft)
1805 prefered_lft = valid_lft;
1806 update_lft = 1;
1807 }
1808 }
1809
1810 if (update_lft) {
1811 ifp->valid_lft = valid_lft;
1812 ifp->prefered_lft = prefered_lft;
1813 ifp->tstamp = now;
1814 flags = ifp->flags;
1815 ifp->flags &= ~IFA_F_DEPRECATED;
1816 spin_unlock(&ifp->lock);
1817
1818 if (!(flags&IFA_F_TENTATIVE))
1819 ipv6_ifa_notify(0, ifp);
1820 } else
1821 spin_unlock(&ifp->lock);
1822
1823#ifdef CONFIG_IPV6_PRIVACY
1824 read_lock_bh(&in6_dev->lock);
1825 /* update all temporary addresses in the list */
1826 for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
1827 /*
1828 * When adjusting the lifetimes of an existing
1829 * temporary address, only lower the lifetimes.
1830 * Implementations must not increase the
1831 * lifetimes of an existing temporary address
1832 * when processing a Prefix Information Option.
1833 */
1834 spin_lock(&ift->lock);
1835 flags = ift->flags;
1836 if (ift->valid_lft > valid_lft &&
1837 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1838 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1839 if (ift->prefered_lft > prefered_lft &&
1840 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1841 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1842 spin_unlock(&ift->lock);
1843 if (!(flags&IFA_F_TENTATIVE))
1844 ipv6_ifa_notify(0, ift);
1845 }
1846
1847 if (create && in6_dev->cnf.use_tempaddr > 0) {
1848 /*
1849 * When a new public address is created as described in [ADDRCONF],
1850 * also create a new temporary address.
1851 */
1ab1457c 1852 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 1853 ipv6_create_tempaddr(ifp, NULL);
1854 } else {
1855 read_unlock_bh(&in6_dev->lock);
1856 }
1857#endif
1858 in6_ifa_put(ifp);
1859 addrconf_verify(0);
1860 }
1861 }
1862 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
1863 in6_dev_put(in6_dev);
1864}
1865
1866/*
1867 * Set destination address.
1868 * Special case for SIT interfaces where we create a new "virtual"
1869 * device.
1870 */
af284937 1871int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 1872{
1873 struct in6_ifreq ireq;
1874 struct net_device *dev;
1875 int err = -EINVAL;
1876
1877 rtnl_lock();
1878
1879 err = -EFAULT;
1880 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
1881 goto err_exit;
1882
af284937 1883 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 1884
1885 err = -ENODEV;
1886 if (dev == NULL)
1887 goto err_exit;
1888
0be669bb 1889#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1890 if (dev->type == ARPHRD_SIT) {
1891 struct ifreq ifr;
1892 mm_segment_t oldfs;
1893 struct ip_tunnel_parm p;
1894
1895 err = -EADDRNOTAVAIL;
1896 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
1897 goto err_exit;
1898
1899 memset(&p, 0, sizeof(p));
1900 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
1901 p.iph.saddr = 0;
1902 p.iph.version = 4;
1903 p.iph.ihl = 5;
1904 p.iph.protocol = IPPROTO_IPV6;
1905 p.iph.ttl = 64;
d20b3109 1906 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4
LT		 1907
1908 oldfs = get_fs(); set_fs(KERNEL_DS);
1909 err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
1910 set_fs(oldfs);
1911
1912 if (err == 0) {
1913 err = -ENOBUFS;
af284937
DL		 1914 dev = __dev_get_by_name(net, p.name);
1915 if (!dev)
1da177e4
LT		 1916 goto err_exit;
1917 err = dev_open(dev);
1918 }
1919 }
0be669bb 1920#endif
1da177e4
LT		 1921
1922err_exit:
1923 rtnl_unlock();
1924 return err;
1925}
1926
1927/*
1928 * Manual configuration of address on an interface
1929 */
af284937
DL		 1930static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
1931 int plen, __u8 ifa_flags, __u32 prefered_lft,
1932 __u32 valid_lft)
1da177e4
LT		 1933{
1934 struct inet6_ifaddr *ifp;
1935 struct inet6_dev *idev;
1936 struct net_device *dev;
1937 int scope;
46d48046 1938 u32 flags = RTF_EXPIRES;
1da177e4
LT		 1939
1940 ASSERT_RTNL();
1ab1457c 1941
0778769d
NT		 1942 /* check the lifetime */
1943 if (!valid_lft || prefered_lft > valid_lft)
1944 return -EINVAL;
1945
af284937
DL		 1946 dev = __dev_get_by_index(net, ifindex);
1947 if (!dev)
1da177e4 1948 return -ENODEV;
1ab1457c 1949
1da177e4
LT		 1950 if ((idev = addrconf_add_dev(dev)) == NULL)
1951 return -ENOBUFS;
1952
1953 scope = ipv6_addr_scope(pfx);
1954
46d48046 1955 if (valid_lft == INFINITY_LIFE_TIME) {
0778769d 1956 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 1957 flags = 0;
1958 } else if (valid_lft >= 0x7FFFFFFF/HZ)
0778769d
NT		 1959 valid_lft = 0x7FFFFFFF/HZ;
1960
1961 if (prefered_lft == 0)
1962 ifa_flags |= IFA_F_DEPRECATED;
1963 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
1964 (prefered_lft != INFINITY_LIFE_TIME))
1965 prefered_lft = 0x7FFFFFFF/HZ;
1966
1967 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
1968
1da177e4 1969 if (!IS_ERR(ifp)) {
06aebfb7 1970 spin_lock_bh(&ifp->lock);
0778769d
NT		 1971 ifp->valid_lft = valid_lft;
1972 ifp->prefered_lft = prefered_lft;
1973 ifp->tstamp = jiffies;
06aebfb7 1974 spin_unlock_bh(&ifp->lock);
0778769d 1975
46d48046
YH		 1976 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
1977 jiffies_to_clock_t(valid_lft * HZ), flags);
95c385b4
NH		 1978 /*
1979 * Note that section 3.1 of RFC 4429 indicates
1980 * that the Optimistic flag should not be set for
1981 * manually configured addresses
1982 */
1da177e4
LT		 1983 addrconf_dad_start(ifp, 0);
1984 in6_ifa_put(ifp);
0778769d 1985 addrconf_verify(0);
1da177e4
LT		 1986 return 0;
1987 }
1988
1989 return PTR_ERR(ifp);
1990}
1991
af284937
DL		 1992static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
1993 int plen)
1da177e4
LT		 1994{
1995 struct inet6_ifaddr *ifp;
1996 struct inet6_dev *idev;
1997 struct net_device *dev;
1ab1457c 1998
af284937
DL		 1999 dev = __dev_get_by_index(net, ifindex);
2000 if (!dev)
1da177e4
LT		 2001 return -ENODEV;
2002
2003 if ((idev = __in6_dev_get(dev)) == NULL)
2004 return -ENXIO;
2005
2006 read_lock_bh(&idev->lock);
2007 for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
2008 if (ifp->prefix_len == plen &&
2009 ipv6_addr_equal(pfx, &ifp->addr)) {
2010 in6_ifa_hold(ifp);
2011 read_unlock_bh(&idev->lock);
1ab1457c 2012
1da177e4
LT		 2013 ipv6_del_addr(ifp);
2014
2015 /* If the last address is deleted administratively,
2016 disable IPv6 on this interface.
2017 */
2018 if (idev->addr_list == NULL)
2019 addrconf_ifdown(idev->dev, 1);
2020 return 0;
2021 }
2022 }
2023 read_unlock_bh(&idev->lock);
2024 return -EADDRNOTAVAIL;
2025}
2026
2027
af284937 2028int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2029{
2030 struct in6_ifreq ireq;
2031 int err;
1ab1457c 2032
1da177e4
LT		 2033 if (!capable(CAP_NET_ADMIN))
2034 return -EPERM;
1ab1457c 2035
1da177e4
LT		 2036 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2037 return -EFAULT;
2038
2039 rtnl_lock();
af284937
DL		 2040 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2041 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2042 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2043 rtnl_unlock();
2044 return err;
2045}
2046
af284937 2047int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2048{
2049 struct in6_ifreq ireq;
2050 int err;
1ab1457c 2051
1da177e4
LT		 2052 if (!capable(CAP_NET_ADMIN))
2053 return -EPERM;
2054
2055 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2056 return -EFAULT;
2057
2058 rtnl_lock();
af284937
DL		 2059 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2060 ireq.ifr6_prefixlen);
1da177e4
LT		 2061 rtnl_unlock();
2062 return err;
2063}
2064
0be669bb 2065#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2066static void sit_add_v4_addrs(struct inet6_dev *idev)
2067{
2068 struct inet6_ifaddr * ifp;
2069 struct in6_addr addr;
2070 struct net_device *dev;
6fda7350 2071 struct net *net = idev->dev->nd_net;
1da177e4
LT		 2072 int scope;
2073
2074 ASSERT_RTNL();
2075
2076 memset(&addr, 0, sizeof(struct in6_addr));
2077 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2078
2079 if (idev->dev->flags&IFF_POINTOPOINT) {
2080 addr.s6_addr32[0] = htonl(0xfe800000);
2081 scope = IFA_LINK;
2082 } else {
2083 scope = IPV6_ADDR_COMPATv4;
2084 }
2085
2086 if (addr.s6_addr32[3]) {
2087 ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
2088 if (!IS_ERR(ifp)) {
2089 spin_lock_bh(&ifp->lock);
2090 ifp->flags &= ~IFA_F_TENTATIVE;
2091 spin_unlock_bh(&ifp->lock);
2092 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2093 in6_ifa_put(ifp);
2094 }
2095 return;
2096 }
2097
6fda7350 2098 for_each_netdev(net, dev) {
e5ed6399 2099 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2100 if (in_dev && (dev->flags & IFF_UP)) {
2101 struct in_ifaddr * ifa;
2102
2103 int flag = scope;
2104
2105 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2106 int plen;
2107
2108 addr.s6_addr32[3] = ifa->ifa_local;
2109
2110 if (ifa->ifa_scope == RT_SCOPE_LINK)
2111 continue;
2112 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2113 if (idev->dev->flags&IFF_POINTOPOINT)
2114 continue;
2115 flag |= IFA_HOST;
2116 }
2117 if (idev->dev->flags&IFF_POINTOPOINT)
2118 plen = 64;
2119 else
2120 plen = 96;
2121
2122 ifp = ipv6_add_addr(idev, &addr, plen, flag,
2123 IFA_F_PERMANENT);
2124 if (!IS_ERR(ifp)) {
2125 spin_lock_bh(&ifp->lock);
2126 ifp->flags &= ~IFA_F_TENTATIVE;
2127 spin_unlock_bh(&ifp->lock);
2128 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2129 in6_ifa_put(ifp);
2130 }
2131 }
2132 }
1ab1457c 2133 }
1da177e4 2134}
0be669bb 2135#endif
1da177e4
LT		 2136
2137static void init_loopback(struct net_device *dev)
2138{
2139 struct inet6_dev *idev;
2140 struct inet6_ifaddr * ifp;
2141
2142 /* ::1 */
2143
2144 ASSERT_RTNL();
2145
2146 if ((idev = ipv6_find_idev(dev)) == NULL) {
2147 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2148 return;
2149 }
2150
2151 ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
2152 if (!IS_ERR(ifp)) {
2153 spin_lock_bh(&ifp->lock);
2154 ifp->flags &= ~IFA_F_TENTATIVE;
2155 spin_unlock_bh(&ifp->lock);
2156 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2157 in6_ifa_put(ifp);
2158 }
2159}
2160
2161static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2162{
2163 struct inet6_ifaddr * ifp;
95c385b4
NH		 2164 u32 addr_flags = IFA_F_PERMANENT;
2165
2166#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2167 if (idev->cnf.optimistic_dad &&
2168 !ipv6_devconf.forwarding)
2169 addr_flags |= IFA_F_OPTIMISTIC;
2170#endif
1da177e4 2171
95c385b4
NH		 2172
2173 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2174 if (!IS_ERR(ifp)) {
46d48046 2175 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2176 addrconf_dad_start(ifp, 0);
2177 in6_ifa_put(ifp);
2178 }
2179}
2180
2181static void addrconf_dev_config(struct net_device *dev)
2182{
2183 struct in6_addr addr;
2184 struct inet6_dev * idev;
2185
2186 ASSERT_RTNL();
2187
74235a25
HX		 2188 if ((dev->type != ARPHRD_ETHER) &&
2189 (dev->type != ARPHRD_FDDI) &&
2190 (dev->type != ARPHRD_IEEE802_TR) &&
2191 (dev->type != ARPHRD_ARCNET) &&
2192 (dev->type != ARPHRD_INFINIBAND)) {
2193 /* Alas, we support only Ethernet autoconfiguration. */
2194 return;
2195 }
2196
1da177e4
LT		 2197 idev = addrconf_add_dev(dev);
2198 if (idev == NULL)
2199 return;
2200
2201 memset(&addr, 0, sizeof(struct in6_addr));
2202 addr.s6_addr32[0] = htonl(0xFE800000);
2203
2204 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2205 addrconf_add_linklocal(idev, &addr);
2206}
2207
0be669bb 2208#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2209static void addrconf_sit_config(struct net_device *dev)
2210{
2211 struct inet6_dev *idev;
2212
2213 ASSERT_RTNL();
2214
1ab1457c
YH		 2215 /*
2216 * Configure the tunnel with one of our IPv4
2217 * addresses... we should configure all of
1da177e4
LT		 2218 * our v4 addrs in the tunnel
2219 */
2220
2221 if ((idev = ipv6_find_idev(dev)) == NULL) {
2222 printk(KERN_DEBUG "init sit: add_dev failed\n");
2223 return;
2224 }
2225
c7dc89c0
FT		 2226 if (dev->priv_flags & IFF_ISATAP) {
2227 struct in6_addr addr;
2228
2229 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2230 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2231 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2232 addrconf_add_linklocal(idev, &addr);
2233 return;
2234 }
2235
1da177e4
LT		 2236 sit_add_v4_addrs(idev);
2237
2238 if (dev->flags&IFF_POINTOPOINT) {
2239 addrconf_add_mroute(dev);
2240 addrconf_add_lroute(dev);
2241 } else
2242 sit_route_add(dev);
2243}
0be669bb 2244#endif
1da177e4
LT		 2245
2246static inline int
2247ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2248{
2249 struct in6_addr lladdr;
2250
95c385b4 2251 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2252 addrconf_add_linklocal(idev, &lladdr);
2253 return 0;
2254 }
2255 return -1;
2256}
2257
2258static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2259{
2260 struct net_device *link_dev;
6fda7350 2261 struct net *net = idev->dev->nd_net;
1da177e4
LT		 2262
2263 /* first try to inherit the link-local address from the link device */
2264 if (idev->dev->iflink &&
6fda7350 2265 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2266 if (!ipv6_inherit_linklocal(idev, link_dev))
2267 return;
2268 }
2269 /* then try to inherit it from any device */
6fda7350 2270 for_each_netdev(net, link_dev) {
1da177e4
LT		 2271 if (!ipv6_inherit_linklocal(idev, link_dev))
2272 return;
2273 }
2274 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2275}
2276
2277/*
2278 * Autoconfigure tunnel with a link-local address so routing protocols,
2279 * DHCPv6, MLD etc. can be run over the virtual link
2280 */
2281
2282static void addrconf_ip6_tnl_config(struct net_device *dev)
2283{
2284 struct inet6_dev *idev;
2285
2286 ASSERT_RTNL();
2287
2288 if ((idev = addrconf_add_dev(dev)) == NULL) {
2289 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2290 return;
2291 }
2292 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2293}
2294
1ab1457c 2295static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2296 void * data)
2297{
2298 struct net_device *dev = (struct net_device *) data;
74235a25 2299 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2300 int run_pending = 0;
b217d616 2301 int err;
1da177e4
LT		 2302
2303 switch(event) {
45ba9dd2 2304 case NETDEV_REGISTER:
74235a25 2305 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2306 idev = ipv6_add_dev(dev);
2307 if (!idev)
b217d616 2308 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2309 }
2310 break;
1da177e4 2311 case NETDEV_UP:
3c21edbd 2312 case NETDEV_CHANGE:
c2edacf8
JV		 2313 if (dev->flags & IFF_SLAVE)
2314 break;
2315
3c21edbd 2316 if (event == NETDEV_UP) {
f24e3d65 2317 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2318 /* device is not ready yet. */
2319 printk(KERN_INFO
2320 "ADDRCONF(NETDEV_UP): %s: "
2321 "link is not ready\n",
2322 dev->name);
2323 break;
2324 }
99081049 2325
d31c7b8f
EP		 2326 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2327 idev = ipv6_add_dev(dev);
2328
99081049
KS		 2329 if (idev)
2330 idev->if_flags |= IF_READY;
3c21edbd 2331 } else {
f24e3d65 2332 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2333 /* device is still not ready. */
2334 break;
2335 }
2336
2337 if (idev) {
2338 if (idev->if_flags & IF_READY) {
2339 /* device is already configured. */
2340 break;
2341 }
2342 idev->if_flags |= IF_READY;
2343 }
2344
2345 printk(KERN_INFO
2346 "ADDRCONF(NETDEV_CHANGE): %s: "
2347 "link becomes ready\n",
2348 dev->name);
2349
c5e33bdd 2350 run_pending = 1;
3c21edbd
YH		 2351 }
2352
1da177e4 2353 switch(dev->type) {
0be669bb 2354#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2355 case ARPHRD_SIT:
2356 addrconf_sit_config(dev);
2357 break;
0be669bb 2358#endif
1da177e4
LT		 2359 case ARPHRD_TUNNEL6:
2360 addrconf_ip6_tnl_config(dev);
2361 break;
2362 case ARPHRD_LOOPBACK:
2363 init_loopback(dev);
2364 break;
2365
2366 default:
2367 addrconf_dev_config(dev);
2368 break;
3ff50b79 2369 }
1da177e4 2370 if (idev) {
c5e33bdd
YH		 2371 if (run_pending)
2372 addrconf_dad_run(idev);
2373
1da177e4
LT		 2374 /* If the MTU changed during the interface down, when the
2375 interface up, the changed MTU must be reflected in the
2376 idev as well as routers.
2377 */
2378 if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
2379 rt6_mtu_change(dev, dev->mtu);
2380 idev->cnf.mtu6 = dev->mtu;
2381 }
2382 idev->tstamp = jiffies;
2383 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2384 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2385 stop IPv6 on this interface.
2386 */
2387 if (dev->mtu < IPV6_MIN_MTU)
2388 addrconf_ifdown(dev, event != NETDEV_DOWN);
2389 }
2390 break;
2391
2392 case NETDEV_CHANGEMTU:
d31c7b8f 2393 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2394 rt6_mtu_change(dev, dev->mtu);
2395 idev->cnf.mtu6 = dev->mtu;
2396 break;
2397 }
2398
d31c7b8f
EP		 2399 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2400 idev = ipv6_add_dev(dev);
2401 if (idev)
2402 break;
2403 }
2404
1da177e4
LT		 2405 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2406
2407 case NETDEV_DOWN:
2408 case NETDEV_UNREGISTER:
2409 /*
2410 * Remove all addresses from this interface.
2411 */
2412 addrconf_ifdown(dev, event != NETDEV_DOWN);
2413 break;
3c21edbd 2414
1da177e4 2415 case NETDEV_CHANGENAME:
1da177e4 2416 if (idev) {
5632c515 2417 snmp6_unregister_dev(idev);
408c4768 2418 addrconf_sysctl_unregister(idev);
f52295a9 2419 addrconf_sysctl_register(idev);
b217d616
HX		 2420 err = snmp6_register_dev(idev);
2421 if (err)
2422 return notifier_from_errno(err);
5632c515 2423 }
1da177e4 2424 break;
3ff50b79 2425 }
1da177e4
LT		 2426
2427 return NOTIFY_OK;
2428}
2429
2430/*
2431 * addrconf module should be notified of a device going up
2432 */
2433static struct notifier_block ipv6_dev_notf = {
2434 .notifier_call = addrconf_notify,
2435 .priority = 0
2436};
2437
2438static int addrconf_ifdown(struct net_device *dev, int how)
2439{
2440 struct inet6_dev *idev;
2441 struct inet6_ifaddr *ifa, **bifa;
f3db4851 2442 struct net *net = dev->nd_net;
1da177e4
LT		 2443 int i;
2444
2445 ASSERT_RTNL();
2446
2774c7ab 2447 if (dev == init_net.loopback_dev && how == 1)
1da177e4
LT		 2448 how = 0;
2449
f3db4851 2450 rt6_ifdown(net, dev);
1da177e4
LT		 2451 neigh_ifdown(&nd_tbl, dev);
2452
2453 idev = __in6_dev_get(dev);
2454 if (idev == NULL)
2455 return -ENODEV;
2456
2457 /* Step 1: remove reference to ipv6 device from parent device.
1ab1457c 2458 Do not dev_put!
1da177e4
LT		 2459 */
2460 if (how == 1) {
1da177e4 2461 idev->dead = 1;
8814c4b5
YH		 2462
2463 /* protected by rtnl_lock */
2464 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2465
2466 /* Step 1.5: remove snmp6 entry */
2467 snmp6_unregister_dev(idev);
2468
2469 }
2470
2471 /* Step 2: clear hash table */
2472 for (i=0; i<IN6_ADDR_HSIZE; i++) {
2473 bifa = &inet6_addr_lst[i];
2474
2475 write_lock_bh(&addrconf_hash_lock);
2476 while ((ifa = *bifa) != NULL) {
2477 if (ifa->idev == idev) {
2478 *bifa = ifa->lst_next;
2479 ifa->lst_next = NULL;
2480 addrconf_del_timer(ifa);
2481 in6_ifa_put(ifa);
2482 continue;
2483 }
2484 bifa = &ifa->lst_next;
2485 }
2486 write_unlock_bh(&addrconf_hash_lock);
2487 }
2488
2489 write_lock_bh(&idev->lock);
2490
2491 /* Step 3: clear flags for stateless addrconf */
2492 if (how != 1)
3c21edbd 2493 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4
LT		 2494
2495 /* Step 4: clear address list */
2496#ifdef CONFIG_IPV6_PRIVACY
2497 if (how == 1 && del_timer(&idev->regen_timer))
2498 in6_dev_put(idev);
2499
2500 /* clear tempaddr list */
2501 while ((ifa = idev->tempaddr_list) != NULL) {
2502 idev->tempaddr_list = ifa->tmp_next;
2503 ifa->tmp_next = NULL;
2504 ifa->dead = 1;
2505 write_unlock_bh(&idev->lock);
2506 spin_lock_bh(&ifa->lock);
2507
2508 if (ifa->ifpub) {
2509 in6_ifa_put(ifa->ifpub);
2510 ifa->ifpub = NULL;
2511 }
2512 spin_unlock_bh(&ifa->lock);
2513 in6_ifa_put(ifa);
2514 write_lock_bh(&idev->lock);
2515 }
2516#endif
2517 while ((ifa = idev->addr_list) != NULL) {
2518 idev->addr_list = ifa->if_next;
2519 ifa->if_next = NULL;
2520 ifa->dead = 1;
2521 addrconf_del_timer(ifa);
2522 write_unlock_bh(&idev->lock);
2523
2524 __ipv6_ifa_notify(RTM_DELADDR, ifa);
063ed369 2525 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
1da177e4
LT		 2526 in6_ifa_put(ifa);
2527
2528 write_lock_bh(&idev->lock);
2529 }
2530 write_unlock_bh(&idev->lock);
2531
2532 /* Step 5: Discard multicast list */
2533
2534 if (how == 1)
2535 ipv6_mc_destroy_dev(idev);
2536 else
2537 ipv6_mc_down(idev);
2538
1da177e4 2539 idev->tstamp = jiffies;
1ab1457c 2540
1da177e4
LT		 2541 /* Shot the device (if unregistered) */
2542
2543 if (how == 1) {
408c4768 2544 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2545 neigh_parms_release(&nd_tbl, idev->nd_parms);
2546 neigh_ifdown(&nd_tbl, dev);
2547 in6_dev_put(idev);
2548 }
2549 return 0;
2550}
2551
2552static void addrconf_rs_timer(unsigned long data)
2553{
2554 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2555
2556 if (ifp->idev->cnf.forwarding)
2557 goto out;
2558
2559 if (ifp->idev->if_flags & IF_RA_RCVD) {
2560 /*
2561 * Announcement received after solicitation
2562 * was sent
2563 */
2564 goto out;
2565 }
2566
2567 spin_lock(&ifp->lock);
2568 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2569 struct in6_addr all_routers;
2570
2571 /* The wait after the last probe can be shorter */
2572 addrconf_mod_timer(ifp, AC_RS,
2573 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2574 ifp->idev->cnf.rtr_solicit_delay :
2575 ifp->idev->cnf.rtr_solicit_interval);
2576 spin_unlock(&ifp->lock);
2577
2578 ipv6_addr_all_routers(&all_routers);
2579
2580 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2581 } else {
2582 spin_unlock(&ifp->lock);
2583 /*
2584 * Note: we do not support deprecated "all on-link"
2585 * assumption any longer.
2586 */
2587 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2588 ifp->idev->dev->name);
2589 }
2590
2591out:
2592 in6_ifa_put(ifp);
2593}
2594
2595/*
2596 * Duplicate Address Detection
2597 */
3c21edbd
YH		 2598static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2599{
2600 unsigned long rand_num;
2601 struct inet6_dev *idev = ifp->idev;
2602
95c385b4
NH		 2603 if (ifp->flags & IFA_F_OPTIMISTIC)
2604 rand_num = 0;
2605 else
2606 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2607
3c21edbd
YH		 2608 ifp->probes = idev->cnf.dad_transmits;
2609 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2610}
2611
e431b8c0 2612static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2613{
2614 struct inet6_dev *idev = ifp->idev;
2615 struct net_device *dev = idev->dev;
1da177e4
LT		 2616
2617 addrconf_join_solict(dev, &ifp->addr);
2618
1da177e4 2619 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2620
2621 read_lock_bh(&idev->lock);
2622 if (ifp->dead)
2623 goto out;
2624 spin_lock_bh(&ifp->lock);
2625
2626 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
55ebaef1
NT		 2627 !(ifp->flags&IFA_F_TENTATIVE) ||
2628 ifp->flags & IFA_F_NODAD) {
95c385b4 2629 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2630 spin_unlock_bh(&ifp->lock);
2631 read_unlock_bh(&idev->lock);
2632
2633 addrconf_dad_completed(ifp);
2634 return;
2635 }
2636
6732bade 2637 if (!(idev->if_flags & IF_READY)) {
3dd3bf83 2638 spin_unlock_bh(&ifp->lock);
6732bade 2639 read_unlock_bh(&idev->lock);
3c21edbd
YH		 2640 /*
2641 * If the defice is not ready:
2642 * - keep it tentative if it is a permanent address.
2643 * - otherwise, kill it.
2644 */
2645 in6_ifa_hold(ifp);
2646 addrconf_dad_stop(ifp);
6732bade 2647 return;
3c21edbd 2648 }
95c385b4
NH		 2649
2650 /*
2651 * Optimistic nodes can start receiving
2652 * Frames right away
2653 */
2654 if(ifp->flags & IFA_F_OPTIMISTIC)
2655 ip6_ins_rt(ifp->rt);
2656
6732bade
YH		 2657 addrconf_dad_kick(ifp);
2658 spin_unlock_bh(&ifp->lock);
1da177e4
LT		 2659out:
2660 read_unlock_bh(&idev->lock);
2661}
2662
2663static void addrconf_dad_timer(unsigned long data)
2664{
2665 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2666 struct inet6_dev *idev = ifp->idev;
2667 struct in6_addr unspec;
2668 struct in6_addr mcaddr;
2669
2670 read_lock_bh(&idev->lock);
2671 if (idev->dead) {
2672 read_unlock_bh(&idev->lock);
2673 goto out;
2674 }
2675 spin_lock_bh(&ifp->lock);
2676 if (ifp->probes == 0) {
2677 /*
2678 * DAD was successful
2679 */
2680
95c385b4 2681 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
1da177e4
LT		 2682 spin_unlock_bh(&ifp->lock);
2683 read_unlock_bh(&idev->lock);
2684
2685 addrconf_dad_completed(ifp);
2686
2687 goto out;
2688 }
2689
2690 ifp->probes--;
2691 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
2692 spin_unlock_bh(&ifp->lock);
2693 read_unlock_bh(&idev->lock);
2694
2695 /* send a neighbour solicitation for our addr */
2696 memset(&unspec, 0, sizeof(unspec));
2697 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
2698 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
2699out:
2700 in6_ifa_put(ifp);
2701}
2702
2703static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2704{
2705 struct net_device * dev = ifp->idev->dev;
2706
2707 /*
2708 * Configure the address for reception. Now it is valid.
2709 */
2710
2711 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2712
2713 /* If added prefix is link local and forwarding is off,
2714 start sending router solicitations.
2715 */
2716
2717 if (ifp->idev->cnf.forwarding == 0 &&
2718 ifp->idev->cnf.rtr_solicits > 0 &&
2719 (dev->flags&IFF_LOOPBACK) == 0 &&
2720 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2721 struct in6_addr all_routers;
2722
2723 ipv6_addr_all_routers(&all_routers);
2724
2725 /*
2726 * If a host as already performed a random delay
2727 * [...] as part of DAD [...] there is no need
2728 * to delay again before sending the first RS
2729 */
2730 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2731
2732 spin_lock_bh(&ifp->lock);
2733 ifp->probes = 1;
2734 ifp->idev->if_flags |= IF_RS_SENT;
2735 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2736 spin_unlock_bh(&ifp->lock);
2737 }
2738}
2739
c5e33bdd
YH		 2740static void addrconf_dad_run(struct inet6_dev *idev) {
2741 struct inet6_ifaddr *ifp;
2742
2743 read_lock_bh(&idev->lock);
2744 for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
2745 spin_lock_bh(&ifp->lock);
2746 if (!(ifp->flags & IFA_F_TENTATIVE)) {
2747 spin_unlock_bh(&ifp->lock);
2748 continue;
2749 }
2750 spin_unlock_bh(&ifp->lock);
2751 addrconf_dad_kick(ifp);
2752 }
2753 read_unlock_bh(&idev->lock);
2754}
2755
1da177e4
LT		 2756#ifdef CONFIG_PROC_FS
2757struct if6_iter_state {
3c40090a 2758 struct seq_net_private p;
1da177e4
LT		 2759 int bucket;
2760};
2761
2762static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2763{
2764 struct inet6_ifaddr *ifa = NULL;
2765 struct if6_iter_state *state = seq->private;
3c40090a 2766 struct net *net = state->p.net;
1da177e4
LT		 2767
2768 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
2769 ifa = inet6_addr_lst[state->bucket];
3c40090a
DL		 2770
2771 while (ifa && ifa->idev->dev->nd_net != net)
2772 ifa = ifa->lst_next;
1da177e4
LT		 2773 if (ifa)
2774 break;
2775 }
2776 return ifa;
2777}
2778
2779static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
2780{
2781 struct if6_iter_state *state = seq->private;
3c40090a 2782 struct net *net = state->p.net;
1da177e4
LT		 2783
2784 ifa = ifa->lst_next;
2785try_again:
3c40090a
DL		 2786 if (ifa) {
2787 if (ifa->idev->dev->nd_net != net) {
2788 ifa = ifa->lst_next;
2789 goto try_again;
2790 }
2791 }
2792
1da177e4
LT		 2793 if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
2794 ifa = inet6_addr_lst[state->bucket];
2795 goto try_again;
2796 }
3c40090a 2797
1da177e4
LT		 2798 return ifa;
2799}
2800
2801static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2802{
2803 struct inet6_ifaddr *ifa = if6_get_first(seq);
2804
2805 if (ifa)
2806 while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
2807 --pos;
2808 return pos ? NULL : ifa;
2809}
2810
2811static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
d20b3109 2812 __acquires(addrconf_hash_lock)
1da177e4
LT		 2813{
2814 read_lock_bh(&addrconf_hash_lock);
2815 return if6_get_idx(seq, *pos);
2816}
2817
2818static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2819{
2820 struct inet6_ifaddr *ifa;
2821
2822 ifa = if6_get_next(seq, v);
2823 ++*pos;
2824 return ifa;
2825}
2826
2827static void if6_seq_stop(struct seq_file *seq, void *v)
d20b3109 2828 __releases(addrconf_hash_lock)
1da177e4
LT		 2829{
2830 read_unlock_bh(&addrconf_hash_lock);
2831}
2832
2833static int if6_seq_show(struct seq_file *seq, void *v)
2834{
2835 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
2836 seq_printf(seq,
9343e79a 2837 NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
1da177e4
LT		 2838 NIP6(ifp->addr),
2839 ifp->idev->dev->ifindex,
2840 ifp->prefix_len,
2841 ifp->scope,
2842 ifp->flags,
2843 ifp->idev->dev->name);
2844 return 0;
2845}
2846
56b3d975 2847static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 2848 .start = if6_seq_start,
2849 .next = if6_seq_next,
2850 .show = if6_seq_show,
2851 .stop = if6_seq_stop,
2852};
2853
2854static int if6_seq_open(struct inode *inode, struct file *file)
2855{
3c40090a
DL		 2856 return seq_open_net(inode, file, &if6_seq_ops,
2857 sizeof(struct if6_iter_state));
1da177e4
LT		 2858}
2859
9a32144e 2860static const struct file_operations if6_fops = {
1da177e4
LT		 2861 .owner = THIS_MODULE,
2862 .open = if6_seq_open,
2863 .read = seq_read,
2864 .llseek = seq_lseek,
3c40090a 2865 .release = seq_release_net,
1da177e4
LT		 2866};
2867
3c40090a 2868static int if6_proc_net_init(struct net *net)
1da177e4 2869{
3c40090a 2870 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 2871 return -ENOMEM;
2872 return 0;
2873}
2874
3c40090a
DL		 2875static void if6_proc_net_exit(struct net *net)
2876{
2877 proc_net_remove(net, "if_inet6");
2878}
2879
2880static struct pernet_operations if6_proc_net_ops = {
2881 .init = if6_proc_net_init,
2882 .exit = if6_proc_net_exit,
2883};
2884
2885int __init if6_proc_init(void)
2886{
2887 return register_pernet_subsys(&if6_proc_net_ops);
2888}
2889
1da177e4
LT		 2890void if6_proc_exit(void)
2891{
3c40090a 2892 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 2893}
2894#endif /* CONFIG_PROC_FS */
2895
59fbb3a6 2896#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 2897/* Check if address is a home address configured on any interface. */
389f6612 2898int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 2899{
2900 int ret = 0;
2901 struct inet6_ifaddr * ifp;
2902 u8 hash = ipv6_addr_hash(addr);
2903 read_lock_bh(&addrconf_hash_lock);
2904 for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
389f6612
DL		 2905 if (ifp->idev->dev->nd_net != net)
2906 continue;
3b9f9a1c
NT		 2907 if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
2908 (ifp->flags & IFA_F_HOMEADDRESS)) {
2909 ret = 1;
2910 break;
2911 }
2912 }
2913 read_unlock_bh(&addrconf_hash_lock);
2914 return ret;
2915}
2916#endif
2917
1da177e4
LT		 2918/*
2919 * Periodic address status verification
2920 */
2921
2922static void addrconf_verify(unsigned long foo)
2923{
2924 struct inet6_ifaddr *ifp;
2925 unsigned long now, next;
2926 int i;
2927
2928 spin_lock_bh(&addrconf_verify_lock);
2929 now = jiffies;
2930 next = now + ADDR_CHECK_FREQUENCY;
2931
2932 del_timer(&addr_chk_timer);
2933
2934 for (i=0; i < IN6_ADDR_HSIZE; i++) {
2935
2936restart:
5d5780df 2937 read_lock(&addrconf_hash_lock);
1da177e4
LT		 2938 for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
2939 unsigned long age;
2940#ifdef CONFIG_IPV6_PRIVACY
2941 unsigned long regen_advance;
2942#endif
2943
2944 if (ifp->flags & IFA_F_PERMANENT)
2945 continue;
2946
2947 spin_lock(&ifp->lock);
2948 age = (now - ifp->tstamp) / HZ;
2949
2950#ifdef CONFIG_IPV6_PRIVACY
1ab1457c
YH		 2951 regen_advance = ifp->idev->cnf.regen_max_retry *
2952 ifp->idev->cnf.dad_transmits *
1da177e4
LT		 2953 ifp->idev->nd_parms->retrans_time / HZ;
2954#endif
2955
8f27ebb9
YH		 2956 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
2957 age >= ifp->valid_lft) {
1da177e4
LT		 2958 spin_unlock(&ifp->lock);
2959 in6_ifa_hold(ifp);
5d5780df 2960 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2961 ipv6_del_addr(ifp);
2962 goto restart;
8f27ebb9
YH		 2963 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
2964 spin_unlock(&ifp->lock);
2965 continue;
1da177e4
LT		 2966 } else if (age >= ifp->prefered_lft) {
2967 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2968 int deprecate = 0;
2969
2970 if (!(ifp->flags&IFA_F_DEPRECATED)) {
2971 deprecate = 1;
2972 ifp->flags |= IFA_F_DEPRECATED;
2973 }
2974
2975 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
2976 next = ifp->tstamp + ifp->valid_lft * HZ;
2977
2978 spin_unlock(&ifp->lock);
2979
2980 if (deprecate) {
2981 in6_ifa_hold(ifp);
5d5780df 2982 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 2983
2984 ipv6_ifa_notify(0, ifp);
2985 in6_ifa_put(ifp);
2986 goto restart;
2987 }
2988#ifdef CONFIG_IPV6_PRIVACY
2989 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
2990 !(ifp->flags&IFA_F_TENTATIVE)) {
2991 if (age >= ifp->prefered_lft - regen_advance) {
2992 struct inet6_ifaddr *ifpub = ifp->ifpub;
2993 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
2994 next = ifp->tstamp + ifp->prefered_lft * HZ;
2995 if (!ifp->regen_count && ifpub) {
2996 ifp->regen_count++;
2997 in6_ifa_hold(ifp);
2998 in6_ifa_hold(ifpub);
2999 spin_unlock(&ifp->lock);
5d5780df 3000 read_unlock(&addrconf_hash_lock);
291d809b
HY		 3001 spin_lock(&ifpub->lock);
3002 ifpub->regen_count = 0;
3003 spin_unlock(&ifpub->lock);
1da177e4
LT		 3004 ipv6_create_tempaddr(ifpub, ifp);
3005 in6_ifa_put(ifpub);
3006 in6_ifa_put(ifp);
3007 goto restart;
3008 }
3009 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3010 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3011 spin_unlock(&ifp->lock);
3012#endif
3013 } else {
3014 /* ifp->prefered_lft <= ifp->valid_lft */
3015 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3016 next = ifp->tstamp + ifp->prefered_lft * HZ;
3017 spin_unlock(&ifp->lock);
3018 }
3019 }
5d5780df 3020 read_unlock(&addrconf_hash_lock);
1da177e4
LT		 3021 }
3022
3023 addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
3024 add_timer(&addr_chk_timer);
3025 spin_unlock_bh(&addrconf_verify_lock);
3026}
3027
461d8837
TG		 3028static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3029{
3030 struct in6_addr *pfx = NULL;
3031
3032 if (addr)
3033 pfx = nla_data(addr);
3034
3035 if (local) {
3036 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3037 pfx = NULL;
3038 else
3039 pfx = nla_data(local);
3040 }
3041
3042 return pfx;
3043}
3044
ef7c79ed 3045static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3046 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3047 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3048 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3049};
3050
1da177e4
LT		 3051static int
3052inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3053{
b854272b 3054 struct net *net = skb->sk->sk_net;
b933f716
TG		 3055 struct ifaddrmsg *ifm;
3056 struct nlattr *tb[IFA_MAX+1];
1da177e4 3057 struct in6_addr *pfx;
b933f716 3058 int err;
1da177e4 3059
b933f716
TG		 3060 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3061 if (err < 0)
3062 return err;
3063
3064 ifm = nlmsg_data(nlh);
3065 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3066 if (pfx == NULL)
3067 return -EINVAL;
3068
af284937 3069 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3070}
3071
55ebaef1
NT		 3072static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3073 u32 prefered_lft, u32 valid_lft)
081bba5b 3074{
46d48046
YH		 3075 u32 flags = RTF_EXPIRES;
3076
081bba5b
NT		 3077 if (!valid_lft || (prefered_lft > valid_lft))
3078 return -EINVAL;
3079
46d48046 3080 if (valid_lft == INFINITY_LIFE_TIME) {
55ebaef1 3081 ifa_flags |= IFA_F_PERMANENT;
46d48046
YH		 3082 flags = 0;
3083 } else if (valid_lft >= 0x7FFFFFFF/HZ)
081bba5b
NT		 3084 valid_lft = 0x7FFFFFFF/HZ;
3085
3086 if (prefered_lft == 0)
55ebaef1 3087 ifa_flags |= IFA_F_DEPRECATED;
081bba5b
NT		 3088 else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
3089 (prefered_lft != INFINITY_LIFE_TIME))
3090 prefered_lft = 0x7FFFFFFF/HZ;
3091
3092 spin_lock_bh(&ifp->lock);
3b9f9a1c 3093 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3094 ifp->tstamp = jiffies;
3095 ifp->valid_lft = valid_lft;
3096 ifp->prefered_lft = prefered_lft;
3097
3098 spin_unlock_bh(&ifp->lock);
3099 if (!(ifp->flags&IFA_F_TENTATIVE))
3100 ipv6_ifa_notify(0, ifp);
081bba5b 3101
46d48046
YH		 3102 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3103 jiffies_to_clock_t(valid_lft * HZ), flags);
081bba5b
NT		 3104 addrconf_verify(0);
3105
3106 return 0;
3107}
3108
1da177e4
LT		 3109static int
3110inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3111{
b854272b 3112 struct net *net = skb->sk->sk_net;
461d8837
TG		 3113 struct ifaddrmsg *ifm;
3114 struct nlattr *tb[IFA_MAX+1];
1da177e4 3115 struct in6_addr *pfx;
7198f8ce
TG		 3116 struct inet6_ifaddr *ifa;
3117 struct net_device *dev;
55ebaef1
NT		 3118 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3119 u8 ifa_flags;
461d8837 3120 int err;
1da177e4 3121
461d8837
TG		 3122 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3123 if (err < 0)
3124 return err;
3125
3126 ifm = nlmsg_data(nlh);
3127 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3128 if (pfx == NULL)
3129 return -EINVAL;
3130
461d8837 3131 if (tb[IFA_CACHEINFO]) {
0778769d 3132 struct ifa_cacheinfo *ci;
461d8837
TG		 3133
3134 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3135 valid_lft = ci->ifa_valid;
461d8837
TG		 3136 preferred_lft = ci->ifa_prefered;
3137 } else {
3138 preferred_lft = INFINITY_LIFE_TIME;
3139 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3140 }
3141
af284937 3142 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3143 if (dev == NULL)
3144 return -ENODEV;
3145
55ebaef1 3146 /* We ignore other flags so far. */
3b9f9a1c 3147 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3148
1cab3da6 3149 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3150 if (ifa == NULL) {
3151 /*
3152 * It would be best to check for !NLM_F_CREATE here but
3153 * userspace alreay relies on not having to provide this.
3154 */
af284937
DL		 3155 return inet6_addr_add(net, ifm->ifa_index, pfx,
3156 ifm->ifa_prefixlen, ifa_flags,
3157 preferred_lft, valid_lft);
081bba5b
NT		 3158 }
3159
7198f8ce
TG		 3160 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3161 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3162 err = -EEXIST;
3163 else
55ebaef1 3164 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3165
3166 in6_ifa_put(ifa);
3167
3168 return err;
1da177e4
LT		 3169}
3170
101bb229
TG		 3171static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3172 u8 scope, int ifindex)
3173{
3174 struct ifaddrmsg *ifm;
3175
3176 ifm = nlmsg_data(nlh);
3177 ifm->ifa_family = AF_INET6;
3178 ifm->ifa_prefixlen = prefixlen;
3179 ifm->ifa_flags = flags;
3180 ifm->ifa_scope = scope;
3181 ifm->ifa_index = ifindex;
3182}
3183
85486af0
TG		 3184static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3185 unsigned long tstamp, u32 preferred, u32 valid)
3186{
3187 struct ifa_cacheinfo ci;
3188
3189 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3190 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3191 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3192 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3193 ci.ifa_prefered = preferred;
3194 ci.ifa_valid = valid;
3195
3196 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3197}
3198
101bb229
TG		 3199static inline int rt_scope(int ifa_scope)
3200{
3201 if (ifa_scope & IFA_HOST)
3202 return RT_SCOPE_HOST;
3203 else if (ifa_scope & IFA_LINK)
3204 return RT_SCOPE_LINK;
3205 else if (ifa_scope & IFA_SITE)
3206 return RT_SCOPE_SITE;
3207 else
3208 return RT_SCOPE_UNIVERSE;
3209}
3210
0ab6803b
TG		 3211static inline int inet6_ifaddr_msgsize(void)
3212{
339bf98f
TG		 3213 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3214 + nla_total_size(16) /* IFA_ADDRESS */
3215 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3216}
c5396a31 3217
1da177e4 3218static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3219 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3220{
1da177e4 3221 struct nlmsghdr *nlh;
85486af0 3222 u32 preferred, valid;
1da177e4 3223
0ab6803b
TG		 3224 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3225 if (nlh == NULL)
26932566 3226 return -EMSGSIZE;
0ab6803b 3227
101bb229
TG		 3228 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3229 ifa->idev->dev->ifindex);
3230
1da177e4 3231 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3232 preferred = ifa->prefered_lft;
3233 valid = ifa->valid_lft;
3234 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3235 long tval = (jiffies - ifa->tstamp)/HZ;
85486af0
TG		 3236 preferred -= tval;
3237 if (valid != INFINITY_LIFE_TIME)
3238 valid -= tval;
1da177e4
LT		 3239 }
3240 } else {
85486af0
TG		 3241 preferred = INFINITY_LIFE_TIME;
3242 valid = INFINITY_LIFE_TIME;
3243 }
3244
0ab6803b 3245 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3246 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3247 nlmsg_cancel(skb, nlh);
3248 return -EMSGSIZE;
3249 }
1da177e4 3250
0ab6803b 3251 return nlmsg_end(skb, nlh);
1da177e4
LT		 3252}
3253
3254static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3255 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3256{
1da177e4 3257 struct nlmsghdr *nlh;
101bb229
TG		 3258 u8 scope = RT_SCOPE_UNIVERSE;
3259 int ifindex = ifmca->idev->dev->ifindex;
3260
3261 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3262 scope = RT_SCOPE_SITE;
1da177e4 3263
0ab6803b
TG		 3264 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3265 if (nlh == NULL)
26932566 3266 return -EMSGSIZE;
85486af0 3267
0ab6803b
TG		 3268 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3269 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3270 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3271 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3272 nlmsg_cancel(skb, nlh);
3273 return -EMSGSIZE;
3274 }
85486af0 3275
0ab6803b 3276 return nlmsg_end(skb, nlh);
1da177e4
LT		 3277}
3278
3279static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3280 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3281{
1da177e4 3282 struct nlmsghdr *nlh;
101bb229
TG		 3283 u8 scope = RT_SCOPE_UNIVERSE;
3284 int ifindex = ifaca->aca_idev->dev->ifindex;
3285
3286 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3287 scope = RT_SCOPE_SITE;
1da177e4 3288
0ab6803b
TG		 3289 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3290 if (nlh == NULL)
26932566 3291 return -EMSGSIZE;
85486af0 3292
0ab6803b
TG		 3293 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3294 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3295 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3296 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3297 nlmsg_cancel(skb, nlh);
3298 return -EMSGSIZE;
3299 }
1da177e4 3300
0ab6803b 3301 return nlmsg_end(skb, nlh);
1da177e4
LT		 3302}
3303
3304enum addr_type_t
3305{
3306 UNICAST_ADDR,
3307 MULTICAST_ADDR,
3308 ANYCAST_ADDR,
3309};
3310
3311static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3312 enum addr_type_t type)
3313{
3314 int idx, ip_idx;
3315 int s_idx, s_ip_idx;
3316 int err = 1;
3317 struct net_device *dev;
3318 struct inet6_dev *idev = NULL;
3319 struct inet6_ifaddr *ifa;
3320 struct ifmcaddr6 *ifmca;
3321 struct ifacaddr6 *ifaca;
6fda7350 3322 struct net *net = skb->sk->sk_net;
1da177e4
LT		 3323
3324 s_idx = cb->args[0];
3325 s_ip_idx = ip_idx = cb->args[1];
1ab1457c 3326
7562f876 3327 idx = 0;
6fda7350 3328 for_each_netdev(net, dev) {
1da177e4 3329 if (idx < s_idx)
7562f876 3330 goto cont;
1da177e4
LT		 3331 if (idx > s_idx)
3332 s_ip_idx = 0;
3333 ip_idx = 0;
3334 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3335 goto cont;
1da177e4
LT		 3336 read_lock_bh(&idev->lock);
3337 switch (type) {
3338 case UNICAST_ADDR:
ae9cda5d 3339 /* unicast address incl. temp addr */
1da177e4
LT		 3340 for (ifa = idev->addr_list; ifa;
3341 ifa = ifa->if_next, ip_idx++) {
3342 if (ip_idx < s_ip_idx)
3343 continue;
5d5619b4
YH		 3344 err = inet6_fill_ifaddr(skb, ifa,
3345 NETLINK_CB(cb->skb).pid,
3346 cb->nlh->nlmsg_seq,
3347 RTM_NEWADDR,
3348 NLM_F_MULTI);
1da177e4 3349 }
1da177e4
LT		 3350 break;
3351 case MULTICAST_ADDR:
3352 /* multicast address */
1ab1457c 3353 for (ifmca = idev->mc_list; ifmca;
1da177e4
LT		 3354 ifmca = ifmca->next, ip_idx++) {
3355 if (ip_idx < s_ip_idx)
3356 continue;
5d5619b4
YH		 3357 err = inet6_fill_ifmcaddr(skb, ifmca,
3358 NETLINK_CB(cb->skb).pid,
3359 cb->nlh->nlmsg_seq,
3360 RTM_GETMULTICAST,
3361 NLM_F_MULTI);
1da177e4
LT		 3362 }
3363 break;
3364 case ANYCAST_ADDR:
3365 /* anycast address */
3366 for (ifaca = idev->ac_list; ifaca;
3367 ifaca = ifaca->aca_next, ip_idx++) {
3368 if (ip_idx < s_ip_idx)
3369 continue;
5d5619b4
YH		 3370 err = inet6_fill_ifacaddr(skb, ifaca,
3371 NETLINK_CB(cb->skb).pid,
3372 cb->nlh->nlmsg_seq,
3373 RTM_GETANYCAST,
3374 NLM_F_MULTI);
1da177e4
LT		 3375 }
3376 break;
3377 default:
3378 break;
3379 }
3380 read_unlock_bh(&idev->lock);
3381 in6_dev_put(idev);
5d5619b4
YH		 3382
3383 if (err <= 0)
3384 break;
7562f876
PE		 3385cont:
3386 idx++;
1da177e4 3387 }
1da177e4
LT		 3388 cb->args[0] = idx;
3389 cb->args[1] = ip_idx;
3390 return skb->len;
3391}
3392
3393static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3394{
3395 enum addr_type_t type = UNICAST_ADDR;
b854272b 3396
1da177e4
LT		 3397 return inet6_dump_addr(skb, cb, type);
3398}
3399
3400static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3401{
3402 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3403
1da177e4
LT		 3404 return inet6_dump_addr(skb, cb, type);
3405}
3406
3407
3408static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3409{
3410 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3411
1da177e4
LT		 3412 return inet6_dump_addr(skb, cb, type);
3413}
3414
1b29fc2c
TG		 3415static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3416 void *arg)
6c223828 3417{
b854272b 3418 struct net *net = in_skb->sk->sk_net;
1b29fc2c
TG		 3419 struct ifaddrmsg *ifm;
3420 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3421 struct in6_addr *addr = NULL;
3422 struct net_device *dev = NULL;
3423 struct inet6_ifaddr *ifa;
3424 struct sk_buff *skb;
6c223828
NT		 3425 int err;
3426
1b29fc2c
TG		 3427 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3428 if (err < 0)
3429 goto errout;
3430
3431 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3432 if (addr == NULL) {
3433 err = -EINVAL;
3434 goto errout;
6c223828 3435 }
6c223828 3436
1b29fc2c 3437 ifm = nlmsg_data(nlh);
6c223828 3438 if (ifm->ifa_index)
6fda7350 3439 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3440
1cab3da6 3441 if ((ifa = ipv6_get_ifaddr(net, addr, dev, 1)) == NULL) {
1b29fc2c
TG		 3442 err = -EADDRNOTAVAIL;
3443 goto errout;
3444 }
6c223828 3445
0ab6803b 3446 if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
6c223828 3447 err = -ENOBUFS;
1b29fc2c 3448 goto errout_ifa;
6c223828
NT		 3449 }
3450
6c223828
NT		 3451 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3452 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3453 if (err < 0) {
3454 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3455 WARN_ON(err == -EMSGSIZE);
3456 kfree_skb(skb);
3457 goto errout_ifa;
3458 }
6fda7350 3459 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3460errout_ifa:
6c223828 3461 in6_ifa_put(ifa);
1b29fc2c 3462errout:
6c223828 3463 return err;
6c223828
NT		 3464}
3465
1da177e4
LT		 3466static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3467{
3468 struct sk_buff *skb;
6fda7350 3469 struct net *net = ifa->idev->dev->nd_net;
5d620266 3470 int err = -ENOBUFS;
1da177e4 3471
0ab6803b 3472 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3473 if (skb == NULL)
3474 goto errout;
3475
3476 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3477 if (err < 0) {
3478 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3479 WARN_ON(err == -EMSGSIZE);
3480 kfree_skb(skb);
3481 goto errout;
3482 }
6fda7350 3483 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
5d620266
TG		 3484errout:
3485 if (err < 0)
6fda7350 3486 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3487}
3488
b6f99a21 3489static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3490 __s32 *array, int bytes)
3491{
04561c1f
TG		 3492 BUG_ON(bytes < (DEVCONF_MAX * 4));
3493
1da177e4
LT		 3494 memset(array, 0, bytes);
3495 array[DEVCONF_FORWARDING] = cnf->forwarding;
3496 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3497 array[DEVCONF_MTU6] = cnf->mtu6;
3498 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3499 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3500 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3501 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3502 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3503 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3504 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3505 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3506#ifdef CONFIG_IPV6_PRIVACY
3507 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3508 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3509 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3510 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3511 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3512#endif
3513 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3514 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3515 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3516#ifdef CONFIG_IPV6_ROUTER_PREF
3517 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3518 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3519#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3520 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3521#endif
930d6ff2 3522#endif
fbea49e1 3523 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3524 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3525#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3526 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3527#endif
1da177e4
LT		 3528}
3529
339bf98f
TG		 3530static inline size_t inet6_if_nlmsg_size(void)
3531{
3532 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3533 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3534 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3535 + nla_total_size(4) /* IFLA_MTU */
3536 + nla_total_size(4) /* IFLA_LINK */
3537 + nla_total_size( /* IFLA_PROTINFO */
3538 nla_total_size(4) /* IFLA_INET6_FLAGS */
3539 + nla_total_size(sizeof(struct ifla_cacheinfo))
3540 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3541 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3542 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3543 );
3544}
c5396a31 3545
7f7d9a6b
HX		 3546static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
3547 int bytes)
3548{
3549 int i;
3550 int pad = bytes - sizeof(u64) * items;
3551 BUG_ON(pad < 0);
3552
3553 /* Use put_unaligned() because stats may not be aligned for u64. */
3554 put_unaligned(items, &stats[0]);
3555 for (i = 1; i < items; i++)
3556 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3557
3558 memset(&stats[items], 0, pad);
3559}
3560
3561static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3562 int bytes)
3563{
3564 switch(attrtype) {
3565 case IFLA_INET6_STATS:
3566 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
3567 break;
3568 case IFLA_INET6_ICMP6STATS:
3569 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
3570 break;
3571 }
3572}
3573
1ab1457c 3574static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3575 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3576{
04561c1f 3577 struct net_device *dev = idev->dev;
bf99f1bd 3578 struct nlattr *nla;
04561c1f
TG		 3579 struct ifinfomsg *hdr;
3580 struct nlmsghdr *nlh;
3581 void *protoinfo;
3582 struct ifla_cacheinfo ci;
3583
3584 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3585 if (nlh == NULL)
26932566 3586 return -EMSGSIZE;
04561c1f
TG		 3587
3588 hdr = nlmsg_data(nlh);
3589 hdr->ifi_family = AF_INET6;
3590 hdr->__ifi_pad = 0;
3591 hdr->ifi_type = dev->type;
3592 hdr->ifi_index = dev->ifindex;
3593 hdr->ifi_flags = dev_get_flags(dev);
3594 hdr->ifi_change = 0;
3595
3596 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3597
3598 if (dev->addr_len)
04561c1f 3599 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3600
04561c1f 3601 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3602 if (dev->ifindex != dev->iflink)
04561c1f 3603 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3604
04561c1f
TG		 3605 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3606 if (protoinfo == NULL)
3607 goto nla_put_failure;
1da177e4 3608
04561c1f 3609 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3610
1da177e4
LT		 3611 ci.max_reasm_len = IPV6_MAXPLEN;
3612 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3613 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3614 ci.reachable_time = idev->nd_parms->reachable_time;
3615 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3616 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3617
bf99f1bd
YH		 3618 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3619 if (nla == NULL)
04561c1f 3620 goto nla_put_failure;
bf99f1bd 3621 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3622
bf99f1bd
YH		 3623 /* XXX - MC not implemented */
3624
3625 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3626 if (nla == NULL)
3627 goto nla_put_failure;
3628 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3629
3630 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3631 if (nla == NULL)
3632 goto nla_put_failure;
3633 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3634
04561c1f
TG		 3635 nla_nest_end(skb, protoinfo);
3636 return nlmsg_end(skb, nlh);
1da177e4 3637
04561c1f 3638nla_put_failure:
26932566
PM		 3639 nlmsg_cancel(skb, nlh);
3640 return -EMSGSIZE;
1da177e4
LT		 3641}
3642
3643static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3644{
b854272b 3645 struct net *net = skb->sk->sk_net;
1da177e4
LT		 3646 int idx, err;
3647 int s_idx = cb->args[0];
3648 struct net_device *dev;
3649 struct inet6_dev *idev;
3650
3651 read_lock(&dev_base_lock);
7562f876 3652 idx = 0;
6fda7350 3653 for_each_netdev(net, dev) {
1da177e4 3654 if (idx < s_idx)
7562f876 3655 goto cont;
1da177e4 3656 if ((idev = in6_dev_get(dev)) == NULL)
7562f876 3657 goto cont;
1ab1457c 3658 err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
b6544c0b 3659 cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
1da177e4
LT		 3660 in6_dev_put(idev);
3661 if (err <= 0)
3662 break;
7562f876
PE		 3663cont:
3664 idx++;
1da177e4
LT		 3665 }
3666 read_unlock(&dev_base_lock);
3667 cb->args[0] = idx;
3668
3669 return skb->len;
3670}
3671
3672void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3673{
3674 struct sk_buff *skb;
6fda7350 3675 struct net *net = idev->dev->nd_net;
8d7a76c9 3676 int err = -ENOBUFS;
1ab1457c 3677
339bf98f 3678 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3679 if (skb == NULL)
3680 goto errout;
3681
3682 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3683 if (err < 0) {
3684 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3685 WARN_ON(err == -EMSGSIZE);
3686 kfree_skb(skb);
3687 goto errout;
3688 }
6fda7350 3689 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
8d7a76c9
TG		 3690errout:
3691 if (err < 0)
6fda7350 3692 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3693}
3694
339bf98f
TG		 3695static inline size_t inet6_prefix_nlmsg_size(void)
3696{
3697 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3698 + nla_total_size(sizeof(struct in6_addr))
3699 + nla_total_size(sizeof(struct prefix_cacheinfo));
3700}
c5396a31 3701
1da177e4 3702static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3703 struct prefix_info *pinfo, u32 pid, u32 seq,
3704 int event, unsigned int flags)
1da177e4 3705{
6051e2f4
TG		 3706 struct prefixmsg *pmsg;
3707 struct nlmsghdr *nlh;
1da177e4
LT		 3708 struct prefix_cacheinfo ci;
3709
6051e2f4
TG		 3710 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3711 if (nlh == NULL)
26932566 3712 return -EMSGSIZE;
6051e2f4
TG		 3713
3714 pmsg = nlmsg_data(nlh);
1da177e4 3715 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3716 pmsg->prefix_pad1 = 0;
3717 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3718 pmsg->prefix_ifindex = idev->dev->ifindex;
3719 pmsg->prefix_len = pinfo->prefix_len;
3720 pmsg->prefix_type = pinfo->type;
8a47077a 3721 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3722 pmsg->prefix_flags = 0;
3723 if (pinfo->onlink)
3724 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3725 if (pinfo->autoconf)
3726 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3727
6051e2f4 3728 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3729
3730 ci.preferred_time = ntohl(pinfo->prefered);
3731 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3732 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3733
6051e2f4 3734 return nlmsg_end(skb, nlh);
1da177e4 3735
6051e2f4 3736nla_put_failure:
26932566
PM		 3737 nlmsg_cancel(skb, nlh);
3738 return -EMSGSIZE;
1da177e4
LT		 3739}
3740
1ab1457c 3741static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 3742 struct prefix_info *pinfo)
3743{
3744 struct sk_buff *skb;
6fda7350 3745 struct net *net = idev->dev->nd_net;
8c384bfa 3746 int err = -ENOBUFS;
1da177e4 3747
339bf98f 3748 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 3749 if (skb == NULL)
3750 goto errout;
3751
3752 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 3753 if (err < 0) {
3754 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3755 WARN_ON(err == -EMSGSIZE);
3756 kfree_skb(skb);
3757 goto errout;
3758 }
6fda7350 3759 err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
8c384bfa
TG		 3760errout:
3761 if (err < 0)
6fda7350 3762 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 3763}
3764
1da177e4
LT		 3765static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3766{
3767 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
3768
3769 switch (event) {
3770 case RTM_NEWADDR:
95c385b4
NH		 3771 /*
3772 * If the address was optimistic
3773 * we inserted the route at the start of
3774 * our DAD process, so we don't need
3775 * to do it again
3776 */
3777 if (!(ifp->rt->rt6i_node))
3778 ip6_ins_rt(ifp->rt);
1da177e4
LT		 3779 if (ifp->idev->cnf.forwarding)
3780 addrconf_join_anycast(ifp);
3781 break;
3782 case RTM_DELADDR:
3783 if (ifp->idev->cnf.forwarding)
3784 addrconf_leave_anycast(ifp);
3785 addrconf_leave_solict(ifp->idev, &ifp->addr);
3786 dst_hold(&ifp->rt->u.dst);
e0a1ad73 3787 if (ip6_del_rt(ifp->rt))
1da177e4 3788 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 3789 break;
3790 }
3791}
3792
3793static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
3794{
8814c4b5 3795 rcu_read_lock_bh();
1da177e4
LT		 3796 if (likely(ifp->idev->dead == 0))
3797 __ipv6_ifa_notify(event, ifp);
8814c4b5 3798 rcu_read_unlock_bh();
1da177e4
LT		 3799}
3800
3801#ifdef CONFIG_SYSCTL
3802
3803static
3804int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
3805 void __user *buffer, size_t *lenp, loff_t *ppos)
3806{
3807 int *valp = ctl->data;
3808 int val = *valp;
3809 int ret;
3810
3811 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3812
c8fecf22
PE		 3813 if (write)
3814 addrconf_fixup_forwarding(ctl, valp, val);
1ab1457c 3815 return ret;
1da177e4
LT		 3816}
3817
1ab1457c 3818static int addrconf_sysctl_forward_strategy(ctl_table *table,
1da177e4
LT		 3819 int __user *name, int nlen,
3820 void __user *oldval,
3821 size_t __user *oldlenp,
1f29bcd7 3822 void __user *newval, size_t newlen)
1da177e4
LT		 3823{
3824 int *valp = table->data;
c8fecf22 3825 int val = *valp;
1da177e4
LT		 3826 int new;
3827
3828 if (!newval || !newlen)
3829 return 0;
3830 if (newlen != sizeof(int))
3831 return -EINVAL;
3832 if (get_user(new, (int __user *)newval))
3833 return -EFAULT;
3834 if (new == *valp)
3835 return 0;
3836 if (oldval && oldlenp) {
3837 size_t len;
3838 if (get_user(len, oldlenp))
3839 return -EFAULT;
3840 if (len) {
3841 if (len > table->maxlen)
3842 len = table->maxlen;
3843 if (copy_to_user(oldval, valp, len))
3844 return -EFAULT;
3845 if (put_user(len, oldlenp))
3846 return -EFAULT;
3847 }
3848 }
3849
c8fecf22
PE		 3850 *valp = new;
3851 addrconf_fixup_forwarding(table, valp, val);
1da177e4
LT		 3852 return 1;
3853}
3854
3855static struct addrconf_sysctl_table
3856{
3857 struct ctl_table_header *sysctl_header;
3858 ctl_table addrconf_vars[__NET_IPV6_MAX];
1dab6222 3859 char *dev_name;
ab32ea5d 3860} addrconf_sysctl __read_mostly = {
1da177e4
LT		 3861 .sysctl_header = NULL,
3862 .addrconf_vars = {
1ab1457c 3863 {
1da177e4
LT		 3864 .ctl_name = NET_IPV6_FORWARDING,
3865 .procname = "forwarding",
1ab1457c 3866 .data = &ipv6_devconf.forwarding,
1da177e4
LT		 3867 .maxlen = sizeof(int),
3868 .mode = 0644,
1ab1457c 3869 .proc_handler = &addrconf_sysctl_forward,
1da177e4
LT		 3870 .strategy = &addrconf_sysctl_forward_strategy,
3871 },
3872 {
3873 .ctl_name = NET_IPV6_HOP_LIMIT,
3874 .procname = "hop_limit",
1ab1457c 3875 .data = &ipv6_devconf.hop_limit,
1da177e4
LT		 3876 .maxlen = sizeof(int),
3877 .mode = 0644,
3878 .proc_handler = proc_dointvec,
3879 },
3880 {
3881 .ctl_name = NET_IPV6_MTU,
3882 .procname = "mtu",
3883 .data = &ipv6_devconf.mtu6,
1ab1457c 3884 .maxlen = sizeof(int),
1da177e4 3885 .mode = 0644,
1ab1457c 3886 .proc_handler = &proc_dointvec,
1da177e4
LT		 3887 },
3888 {
3889 .ctl_name = NET_IPV6_ACCEPT_RA,
3890 .procname = "accept_ra",
1ab1457c 3891 .data = &ipv6_devconf.accept_ra,
1da177e4
LT		 3892 .maxlen = sizeof(int),
3893 .mode = 0644,
1ab1457c 3894 .proc_handler = &proc_dointvec,
1da177e4
LT		 3895 },
3896 {
3897 .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
3898 .procname = "accept_redirects",
1ab1457c 3899 .data = &ipv6_devconf.accept_redirects,
1da177e4
LT		 3900 .maxlen = sizeof(int),
3901 .mode = 0644,
1ab1457c 3902 .proc_handler = &proc_dointvec,
1da177e4
LT		 3903 },
3904 {
3905 .ctl_name = NET_IPV6_AUTOCONF,
3906 .procname = "autoconf",
1ab1457c 3907 .data = &ipv6_devconf.autoconf,
1da177e4
LT		 3908 .maxlen = sizeof(int),
3909 .mode = 0644,
1ab1457c 3910 .proc_handler = &proc_dointvec,
1da177e4
LT		 3911 },
3912 {
3913 .ctl_name = NET_IPV6_DAD_TRANSMITS,
3914 .procname = "dad_transmits",
1ab1457c 3915 .data = &ipv6_devconf.dad_transmits,
1da177e4
LT		 3916 .maxlen = sizeof(int),
3917 .mode = 0644,
1ab1457c 3918 .proc_handler = &proc_dointvec,
1da177e4
LT		 3919 },
3920 {
3921 .ctl_name = NET_IPV6_RTR_SOLICITS,
3922 .procname = "router_solicitations",
1ab1457c 3923 .data = &ipv6_devconf.rtr_solicits,
1da177e4
LT		 3924 .maxlen = sizeof(int),
3925 .mode = 0644,
1ab1457c 3926 .proc_handler = &proc_dointvec,
1da177e4
LT		 3927 },
3928 {
3929 .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
3930 .procname = "router_solicitation_interval",
1ab1457c 3931 .data = &ipv6_devconf.rtr_solicit_interval,
1da177e4
LT		 3932 .maxlen = sizeof(int),
3933 .mode = 0644,
1ab1457c 3934 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3935 .strategy = &sysctl_jiffies,
3936 },
3937 {
3938 .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
3939 .procname = "router_solicitation_delay",
1ab1457c 3940 .data = &ipv6_devconf.rtr_solicit_delay,
1da177e4
LT		 3941 .maxlen = sizeof(int),
3942 .mode = 0644,
1ab1457c 3943 .proc_handler = &proc_dointvec_jiffies,
1da177e4
LT		 3944 .strategy = &sysctl_jiffies,
3945 },
3946 {
3947 .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
3948 .procname = "force_mld_version",
1ab1457c 3949 .data = &ipv6_devconf.force_mld_version,
1da177e4
LT		 3950 .maxlen = sizeof(int),
3951 .mode = 0644,
1ab1457c 3952 .proc_handler = &proc_dointvec,
1da177e4
LT		 3953 },
3954#ifdef CONFIG_IPV6_PRIVACY
3955 {
3956 .ctl_name = NET_IPV6_USE_TEMPADDR,
3957 .procname = "use_tempaddr",
1ab1457c 3958 .data = &ipv6_devconf.use_tempaddr,
1da177e4
LT		 3959 .maxlen = sizeof(int),
3960 .mode = 0644,
1ab1457c 3961 .proc_handler = &proc_dointvec,
1da177e4
LT		 3962 },
3963 {
3964 .ctl_name = NET_IPV6_TEMP_VALID_LFT,
3965 .procname = "temp_valid_lft",
1ab1457c 3966 .data = &ipv6_devconf.temp_valid_lft,
1da177e4
LT		 3967 .maxlen = sizeof(int),
3968 .mode = 0644,
1ab1457c 3969 .proc_handler = &proc_dointvec,
1da177e4
LT		 3970 },
3971 {
3972 .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
3973 .procname = "temp_prefered_lft",
1ab1457c 3974 .data = &ipv6_devconf.temp_prefered_lft,
1da177e4
LT		 3975 .maxlen = sizeof(int),
3976 .mode = 0644,
1ab1457c 3977 .proc_handler = &proc_dointvec,
1da177e4
LT		 3978 },
3979 {
3980 .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
3981 .procname = "regen_max_retry",
1ab1457c 3982 .data = &ipv6_devconf.regen_max_retry,
1da177e4
LT		 3983 .maxlen = sizeof(int),
3984 .mode = 0644,
1ab1457c 3985 .proc_handler = &proc_dointvec,
1da177e4
LT		 3986 },
3987 {
3988 .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
3989 .procname = "max_desync_factor",
1ab1457c 3990 .data = &ipv6_devconf.max_desync_factor,
1da177e4
LT		 3991 .maxlen = sizeof(int),
3992 .mode = 0644,
1ab1457c 3993 .proc_handler = &proc_dointvec,
1da177e4
LT		 3994 },
3995#endif
3996 {
3997 .ctl_name = NET_IPV6_MAX_ADDRESSES,
3998 .procname = "max_addresses",
3999 .data = &ipv6_devconf.max_addresses,
4000 .maxlen = sizeof(int),
4001 .mode = 0644,
4002 .proc_handler = &proc_dointvec,
4003 },
65f5c7c1
YH		 4004 {
4005 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
4006 .procname = "accept_ra_defrtr",
1ab1457c 4007 .data = &ipv6_devconf.accept_ra_defrtr,
65f5c7c1
YH		 4008 .maxlen = sizeof(int),
4009 .mode = 0644,
1ab1457c 4010 .proc_handler = &proc_dointvec,
65f5c7c1 4011 },
c4fd30eb
YH		 4012 {
4013 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
4014 .procname = "accept_ra_pinfo",
1ab1457c 4015 .data = &ipv6_devconf.accept_ra_pinfo,
c4fd30eb
YH		 4016 .maxlen = sizeof(int),
4017 .mode = 0644,
1ab1457c 4018 .proc_handler = &proc_dointvec,
c4fd30eb 4019 },
930d6ff2
YH		 4020#ifdef CONFIG_IPV6_ROUTER_PREF
4021 {
4022 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
4023 .procname = "accept_ra_rtr_pref",
4024 .data = &ipv6_devconf.accept_ra_rtr_pref,
4025 .maxlen = sizeof(int),
4026 .mode = 0644,
4027 .proc_handler = &proc_dointvec,
4028 },
52e16356
YH		 4029 {
4030 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
4031 .procname = "router_probe_interval",
4032 .data = &ipv6_devconf.rtr_probe_interval,
4033 .maxlen = sizeof(int),
4034 .mode = 0644,
4035 .proc_handler = &proc_dointvec_jiffies,
4036 .strategy = &sysctl_jiffies,
4037 },
fa03ef38 4038#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 4039 {
4040 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
4041 .procname = "accept_ra_rt_info_max_plen",
4042 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4043 .maxlen = sizeof(int),
4044 .mode = 0644,
4045 .proc_handler = &proc_dointvec,
4046 },
4047#endif
930d6ff2 4048#endif
fbea49e1
YH		 4049 {
4050 .ctl_name = NET_IPV6_PROXY_NDP,
4051 .procname = "proxy_ndp",
4052 .data = &ipv6_devconf.proxy_ndp,
4053 .maxlen = sizeof(int),
4054 .mode = 0644,
4055 .proc_handler = &proc_dointvec,
4056 },
0bcbc926
YH		 4057 {
4058 .ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
4059 .procname = "accept_source_route",
4060 .data = &ipv6_devconf.accept_source_route,
4061 .maxlen = sizeof(int),
4062 .mode = 0644,
4063 .proc_handler = &proc_dointvec,
4064 },
95c385b4
NH		 4065#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4066 {
4067 .ctl_name = CTL_UNNUMBERED,
4068 .procname = "optimistic_dad",
4069 .data = &ipv6_devconf.optimistic_dad,
4070 .maxlen = sizeof(int),
4071 .mode = 0644,
4072 .proc_handler = &proc_dointvec,
4073
4074 },
4075#endif
1da177e4
LT		 4076 {
4077 .ctl_name = 0, /* sentinel */
4078 }
4079 },
1da177e4
LT		 4080};
4081
bff16c2f
PE		 4082static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4083 int ctl_name, struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4084{
4085 int i;
1da177e4 4086 struct addrconf_sysctl_table *t;
1da177e4 4087
1dab6222
PE		 4088#define ADDRCONF_CTL_PATH_DEV 3
4089
4090 struct ctl_path addrconf_ctl_path[] = {
4091 { .procname = "net", .ctl_name = CTL_NET, },
4092 { .procname = "ipv6", .ctl_name = NET_IPV6, },
4093 { .procname = "conf", .ctl_name = NET_IPV6_CONF, },
4094 { /* to be set */ },
4095 { },
4096 };
4097
4098
af879cc7 4099 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4100 if (t == NULL)
f68635e6
PE		 4101 goto out;
4102
1da177e4
LT		 4103 for (i=0; t->addrconf_vars[i].data; i++) {
4104 t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
1da177e4 4105 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4106 t->addrconf_vars[i].extra2 = net;
1da177e4 4107 }
1da177e4 4108
1ab1457c
YH		 4109 /*
4110 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4111 * by sysctl and we wouldn't want anyone to change it under our feet
4112 * (see SIOCSIFNAME).
1ab1457c 4113 */
1dab6222
PE		 4114 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4115 if (!t->dev_name)
f68635e6 4116 goto free;
1da177e4 4117
1dab6222
PE		 4118 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
4119 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].ctl_name = ctl_name;
1da177e4 4120
bff16c2f 4121 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4122 t->addrconf_vars);
1da177e4
LT		 4123 if (t->sysctl_header == NULL)
4124 goto free_procname;
f68635e6
PE		 4125
4126 p->sysctl = t;
95897312 4127 return 0;
1da177e4 4128
f68635e6 4129free_procname:
1dab6222 4130 kfree(t->dev_name);
f68635e6 4131free:
1da177e4 4132 kfree(t);
f68635e6 4133out:
95897312 4134 return -ENOBUFS;
1da177e4
LT		 4135}
4136
408c4768
PE		 4137static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4138{
4139 struct addrconf_sysctl_table *t;
4140
4141 if (p->sysctl == NULL)
4142 return;
4143
4144 t = p->sysctl;
4145 p->sysctl = NULL;
4146 unregister_sysctl_table(t->sysctl_header);
4147 kfree(t->dev_name);
4148 kfree(t);
4149}
4150
f52295a9
PE		 4151static void addrconf_sysctl_register(struct inet6_dev *idev)
4152{
408c4768
PE		 4153 neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
4154 NET_IPV6_NEIGH, "ipv6",
4155 &ndisc_ifinfo_sysctl_change,
4156 NULL);
bff16c2f
PE		 4157 __addrconf_sysctl_register(idev->dev->nd_net, idev->dev->name,
4158 idev->dev->ifindex, idev, &idev->cnf);
f52295a9
PE		 4159}
4160
408c4768 4161static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4162{
408c4768
PE		 4163 __addrconf_sysctl_unregister(&idev->cnf);
4164 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4165}
4166
4167
4168#endif
4169
e0da5a48
PE		 4170static int addrconf_init_net(struct net *net)
4171{
4172 int err;
4173 struct ipv6_devconf *all, *dflt;
4174
4175 err = -ENOMEM;
4176 all = &ipv6_devconf;
4177 dflt = &ipv6_devconf_dflt;
4178
4179 if (net != &init_net) {
4180 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4181 if (all == NULL)
4182 goto err_alloc_all;
4183
4184 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4185 if (dflt == NULL)
4186 goto err_alloc_dflt;
4187 }
4188
4189 net->ipv6.devconf_all = all;
4190 net->ipv6.devconf_dflt = dflt;
4191
4192#ifdef CONFIG_SYSCTL
4193 err = __addrconf_sysctl_register(net, "all", NET_PROTO_CONF_ALL,
4194 NULL, all);
4195 if (err < 0)
4196 goto err_reg_all;
4197
4198 err = __addrconf_sysctl_register(net, "default", NET_PROTO_CONF_DEFAULT,
4199 NULL, dflt);
4200 if (err < 0)
4201 goto err_reg_dflt;
4202#endif
4203 return 0;
4204
4205#ifdef CONFIG_SYSCTL
4206err_reg_dflt:
4207 __addrconf_sysctl_unregister(all);
4208err_reg_all:
4209 kfree(dflt);
4210#endif
4211err_alloc_dflt:
4212 kfree(all);
4213err_alloc_all:
4214 return err;
4215}
4216
4217static void addrconf_exit_net(struct net *net)
4218{
4219#ifdef CONFIG_SYSCTL
4220 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4221 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4222#endif
4223 if (net != &init_net) {
4224 kfree(net->ipv6.devconf_dflt);
4225 kfree(net->ipv6.devconf_all);
4226 }
4227}
4228
4229static struct pernet_operations addrconf_ops = {
4230 .init = addrconf_init_net,
4231 .exit = addrconf_exit_net,
4232};
4233
1da177e4
LT		 4234/*
4235 * Device notifier
4236 */
4237
4238int register_inet6addr_notifier(struct notifier_block *nb)
4239{
1ab1457c 4240 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4
LT		 4241}
4242
7159039a
YH		 4243EXPORT_SYMBOL(register_inet6addr_notifier);
4244
1da177e4
LT		 4245int unregister_inet6addr_notifier(struct notifier_block *nb)
4246{
1ab1457c 4247 return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
1da177e4
LT		 4248}
4249
7159039a
YH		 4250EXPORT_SYMBOL(unregister_inet6addr_notifier);
4251
af284937
DL		 4252
4253static int addrconf_net_init(struct net *net)
4254{
4255 return 0;
4256}
4257
4258static void addrconf_net_exit(struct net *net)
4259{
6fda7350
BT		 4260 struct net_device *dev;
4261
6fda7350
BT		 4262 rtnl_lock();
4263 /* clean dev list */
4264 for_each_netdev(net, dev) {
4265 if (__in6_dev_get(dev) == NULL)
4266 continue;
4267 addrconf_ifdown(dev, 1);
4268 }
4269 addrconf_ifdown(net->loopback_dev, 2);
4270 rtnl_unlock();
af284937
DL		 4271}
4272
4273static struct pernet_operations addrconf_net_ops = {
4274 .init = addrconf_net_init,
4275 .exit = addrconf_net_exit,
4276};
4277
1da177e4
LT		 4278/*
4279 * Init / cleanup code
4280 */
4281
4282int __init addrconf_init(void)
4283{
2a8cc6c8
YH		 4284 int err;
4285
4286 if ((err = ipv6_addr_label_init()) < 0) {
4287 printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4288 err);
4289 return err;
4290 }
1da177e4 4291
e0da5a48
PE		 4292 register_pernet_subsys(&addrconf_ops);
4293
1da177e4
LT		 4294 /* The addrconf netdev notifier requires that loopback_dev
4295 * has it's ipv6 private information allocated and setup
4296 * before it can bring up and give link-local addresses
4297 * to other devices which are up.
4298 *
4299 * Unfortunately, loopback_dev is not necessarily the first
4300 * entry in the global dev_base list of net devices. In fact,
4301 * it is likely to be the very last entry on that list.
4302 * So this causes the notifier registry below to try and
4303 * give link-local addresses to all devices besides loopback_dev
4304 * first, then loopback_dev, which cases all the non-loopback_dev
4305 * devices to fail to get a link-local address.
4306 *
4307 * So, as a temporary fix, allocate the ipv6 structure for
4308 * loopback_dev first by hand.
4309 * Longer term, all of the dependencies ipv6 has upon the loopback
4310 * device and it being up should be removed.
4311 */
4312 rtnl_lock();
2774c7ab 4313 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4314 err = -ENOMEM;
4315 rtnl_unlock();
4316 if (err)
e0da5a48 4317 goto errlo;
1da177e4 4318
af284937
DL		 4319 err = register_pernet_device(&addrconf_net_ops);
4320 if (err)
4321 return err;
4322
1da177e4
LT		 4323 register_netdevice_notifier(&ipv6_dev_notf);
4324
1da177e4 4325 addrconf_verify(0);
c127ea2c
TG		 4326
4327 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4328 if (err < 0)
4329 goto errout;
4330
4331 /* Only the first call to __rtnl_register can fail */
4332 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4333 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4334 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4335 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4336 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4337
2a8cc6c8
YH		 4338 ipv6_addr_label_rtnl_register();
4339
1da177e4 4340 return 0;
c127ea2c
TG		 4341errout:
4342 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4343errlo:
4344 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4345
4346 return err;
1da177e4
LT		 4347}
4348
09f7709f 4349void addrconf_cleanup(void)
1da177e4 4350{
1ab1457c 4351 struct inet6_ifaddr *ifa;
1da177e4
LT		 4352 int i;
4353
4354 unregister_netdevice_notifier(&ipv6_dev_notf);
af284937 4355 unregister_pernet_device(&addrconf_net_ops);
1da177e4 4356
e0da5a48 4357 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4358
4359 rtnl_lock();
4360
1da177e4
LT		 4361 /*
4362 * Check hash table.
4363 */
1da177e4
LT		 4364 write_lock_bh(&addrconf_hash_lock);
4365 for (i=0; i < IN6_ADDR_HSIZE; i++) {
4366 for (ifa=inet6_addr_lst[i]; ifa; ) {
4367 struct inet6_ifaddr *bifa;
4368
4369 bifa = ifa;
4370 ifa = ifa->lst_next;
4371 printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
4372 /* Do not free it; something is wrong.
4373 Now we can investigate it with debugger.
4374 */
4375 }
4376 }
4377 write_unlock_bh(&addrconf_hash_lock);
4378
4379 del_timer(&addr_chk_timer);
1da177e4 4380 rtnl_unlock();
af284937
DL		 4381
4382 unregister_pernet_subsys(&addrconf_net_ops);
1da177e4 4383}
kernel source for telekom puls (alcatel/mediatek)