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ipv6: Replace inet6_ifaddr->dead with state
[net-next-2.6.git] / net / ipv6 / addrconf.c
CommitLineData
1da177e4
LT		 1/*
2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 *
1da177e4
LT		 9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15/*
16 * Changes:
17 *
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
21 * unload.
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
24 * packets.
25 * yoshfuji@USAGI : Fixed interval between DAD
26 * packets.
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
30 * support.
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
35 * seq_file.
b1cacb68
YH		 36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
38 * status etc.
1da177e4
LT		 39 */
40
1da177e4
LT		 41#include <linux/errno.h>
42#include <linux/types.h>
a0bffffc 43#include <linux/kernel.h>
1da177e4
LT		 44#include <linux/socket.h>
45#include <linux/sockios.h>
1da177e4
LT		 46#include <linux/net.h>
47#include <linux/in6.h>
48#include <linux/netdevice.h>
1823730f 49#include <linux/if_addr.h>
1da177e4
LT		 50#include <linux/if_arp.h>
51#include <linux/if_arcnet.h>
52#include <linux/if_infiniband.h>
53#include <linux/route.h>
54#include <linux/inetdevice.h>
55#include <linux/init.h>
5a0e3ad6 56#include <linux/slab.h>
1da177e4
LT		 57#ifdef CONFIG_SYSCTL
58#include <linux/sysctl.h>
59#endif
4fc268d2 60#include <linux/capability.h>
1da177e4
LT		 61#include <linux/delay.h>
62#include <linux/notifier.h>
543537bd 63#include <linux/string.h>
1da177e4 64
457c4cbc 65#include <net/net_namespace.h>
1da177e4
LT		 66#include <net/sock.h>
67#include <net/snmp.h>
68
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
e21e8467 85#include <linux/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
e21e8467 101#define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b)))
1da177e4 102
b2db7564
YH		 103#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
104#define ADDRCONF_TIMER_FUZZ (HZ / 4)
105#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
106
1da177e4 107#ifdef CONFIG_SYSCTL
f52295a9 108static void addrconf_sysctl_register(struct inet6_dev *idev);
408c4768
PE		 109static void addrconf_sysctl_unregister(struct inet6_dev *idev);
110#else
111static inline void addrconf_sysctl_register(struct inet6_dev *idev)
112{
113}
114
115static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
116{
117}
1da177e4
LT		 118#endif
119
120#ifdef CONFIG_IPV6_PRIVACY
121static int __ipv6_regen_rndid(struct inet6_dev *idev);
1ab1457c 122static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
1da177e4
LT		 123static void ipv6_regen_rndid(unsigned long data);
124
125static int desync_factor = MAX_DESYNC_FACTOR * HZ;
1da177e4
LT		 126#endif
127
1b34be74 128static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
1da177e4
LT		 129static int ipv6_count_addresses(struct inet6_dev *idev);
130
131/*
132 * Configured unicast address hash table
133 */
c2e21293 134static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
5c578aed 135static DEFINE_SPINLOCK(addrconf_hash_lock);
1da177e4 136
1da177e4
LT		 137static void addrconf_verify(unsigned long);
138
8d06afab 139static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
1da177e4
LT		 140static DEFINE_SPINLOCK(addrconf_verify_lock);
141
142static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
143static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
144
93d9b7d7
JP		 145static void addrconf_type_change(struct net_device *dev,
146 unsigned long event);
1da177e4
LT		 147static int addrconf_ifdown(struct net_device *dev, int how);
148
e431b8c0 149static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
1da177e4
LT		 150static void addrconf_dad_timer(unsigned long data);
151static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
c5e33bdd 152static void addrconf_dad_run(struct inet6_dev *idev);
1da177e4
LT		 153static void addrconf_rs_timer(unsigned long data);
154static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
155static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
156
1ab1457c 157static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4 158 struct prefix_info *pinfo);
3e81c6da
DM		 159static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
160 struct net_device *dev);
1da177e4 161
e041c683 162static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
1da177e4 163
888c848e 164static struct ipv6_devconf ipv6_devconf __read_mostly = {
1da177e4
LT		 165 .forwarding = 0,
166 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
167 .mtu6 = IPV6_MIN_MTU,
168 .accept_ra = 1,
169 .accept_redirects = 1,
170 .autoconf = 1,
171 .force_mld_version = 0,
172 .dad_transmits = 1,
173 .rtr_solicits = MAX_RTR_SOLICITATIONS,
174 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
175 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
176#ifdef CONFIG_IPV6_PRIVACY
177 .use_tempaddr = 0,
178 .temp_valid_lft = TEMP_VALID_LIFETIME,
179 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
180 .regen_max_retry = REGEN_MAX_RETRY,
181 .max_desync_factor = MAX_DESYNC_FACTOR,
182#endif
183 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 184 .accept_ra_defrtr = 1,
c4fd30eb 185 .accept_ra_pinfo = 1,
930d6ff2
YH		 186#ifdef CONFIG_IPV6_ROUTER_PREF
187 .accept_ra_rtr_pref = 1,
52e16356 188 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 189#ifdef CONFIG_IPV6_ROUTE_INFO
190 .accept_ra_rt_info_max_plen = 0,
191#endif
930d6ff2 192#endif
fbea49e1 193 .proxy_ndp = 0,
0bcbc926 194 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 195 .disable_ipv6 = 0,
1b34be74 196 .accept_dad = 1,
1da177e4
LT		 197};
198
ab32ea5d 199static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
1da177e4
LT		 200 .forwarding = 0,
201 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
202 .mtu6 = IPV6_MIN_MTU,
203 .accept_ra = 1,
204 .accept_redirects = 1,
205 .autoconf = 1,
206 .dad_transmits = 1,
207 .rtr_solicits = MAX_RTR_SOLICITATIONS,
208 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
209 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
210#ifdef CONFIG_IPV6_PRIVACY
211 .use_tempaddr = 0,
212 .temp_valid_lft = TEMP_VALID_LIFETIME,
213 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
214 .regen_max_retry = REGEN_MAX_RETRY,
215 .max_desync_factor = MAX_DESYNC_FACTOR,
216#endif
217 .max_addresses = IPV6_MAX_ADDRESSES,
65f5c7c1 218 .accept_ra_defrtr = 1,
c4fd30eb 219 .accept_ra_pinfo = 1,
930d6ff2
YH		 220#ifdef CONFIG_IPV6_ROUTER_PREF
221 .accept_ra_rtr_pref = 1,
52e16356 222 .rtr_probe_interval = 60 * HZ,
09c884d4
YH		 223#ifdef CONFIG_IPV6_ROUTE_INFO
224 .accept_ra_rt_info_max_plen = 0,
225#endif
930d6ff2 226#endif
fbea49e1 227 .proxy_ndp = 0,
0bcbc926 228 .accept_source_route = 0, /* we do not accept RH0 by default. */
778d80be 229 .disable_ipv6 = 0,
1b34be74 230 .accept_dad = 1,
1da177e4
LT		 231};
232
233/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
1da177e4 234const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
1da177e4 235const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
f3ee4010
YH		 236const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
237const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
1da177e4 238
f24e3d65 239/* Check if a valid qdisc is available */
05297949 240static inline bool addrconf_qdisc_ok(const struct net_device *dev)
f24e3d65 241{
05297949 242 return !qdisc_tx_is_noop(dev);
f24e3d65
MC		 243}
244
2b5ead46
YH		 245/* Check if a route is valid prefix route */
246static inline int addrconf_is_prefix_route(const struct rt6_info *rt)
247{
248 return ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0);
249}
250
1da177e4
LT		 251static void addrconf_del_timer(struct inet6_ifaddr *ifp)
252{
253 if (del_timer(&ifp->timer))
254 __in6_ifa_put(ifp);
255}
256
e21e8467 257enum addrconf_timer_t {
1da177e4
LT		 258 AC_NONE,
259 AC_DAD,
260 AC_RS,
261};
262
263static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
264 enum addrconf_timer_t what,
265 unsigned long when)
266{
267 if (!del_timer(&ifp->timer))
268 in6_ifa_hold(ifp);
269
270 switch (what) {
271 case AC_DAD:
272 ifp->timer.function = addrconf_dad_timer;
273 break;
274 case AC_RS:
275 ifp->timer.function = addrconf_rs_timer;
276 break;
e21e8467
SH		 277 default:
278 break;
1da177e4
LT		 279 }
280 ifp->timer.expires = jiffies + when;
281 add_timer(&ifp->timer);
282}
283
7f7d9a6b
HX		 284static int snmp6_alloc_dev(struct inet6_dev *idev)
285{
7d720c3e 286 if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
c69bce20 287 sizeof(struct ipstats_mib)) < 0)
7f7d9a6b 288 goto err_ip;
7d720c3e 289 if (snmp_mib_init((void __percpu **)idev->stats.icmpv6,
c69bce20 290 sizeof(struct icmpv6_mib)) < 0)
7f7d9a6b 291 goto err_icmp;
7d720c3e 292 if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg,
c69bce20 293 sizeof(struct icmpv6msg_mib)) < 0)
14878f75 294 goto err_icmpmsg;
7f7d9a6b
HX		 295
296 return 0;
297
14878f75 298err_icmpmsg:
7d720c3e 299 snmp_mib_free((void __percpu **)idev->stats.icmpv6);
7f7d9a6b 300err_icmp:
7d720c3e 301 snmp_mib_free((void __percpu **)idev->stats.ipv6);
7f7d9a6b 302err_ip:
aaf70ec7 303 return -ENOMEM;
7f7d9a6b
HX		 304}
305
16910b98 306static void snmp6_free_dev(struct inet6_dev *idev)
7f7d9a6b 307{
7d720c3e
TH		 308 snmp_mib_free((void __percpu **)idev->stats.icmpv6msg);
309 snmp_mib_free((void __percpu **)idev->stats.icmpv6);
310 snmp_mib_free((void __percpu **)idev->stats.ipv6);
7f7d9a6b
HX		 311}
312
1da177e4
LT		 313/* Nobody refers to this device, we may destroy it. */
314
8814c4b5
YH		 315static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
316{
317 struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
318 kfree(idev);
319}
320
1da177e4
LT		 321void in6_dev_finish_destroy(struct inet6_dev *idev)
322{
323 struct net_device *dev = idev->dev;
547b792c 324
502a2ffd 325 WARN_ON(!list_empty(&idev->addr_list));
547b792c
IJ		 326 WARN_ON(idev->mc_list != NULL);
327
1da177e4
LT		 328#ifdef NET_REFCNT_DEBUG
329 printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
330#endif
331 dev_put(dev);
332 if (!idev->dead) {
e21e8467 333 pr_warning("Freeing alive inet6 device %p\n", idev);
1da177e4
LT		 334 return;
335 }
336 snmp6_free_dev(idev);
8814c4b5 337 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
1da177e4
LT		 338}
339
7159039a
YH		 340EXPORT_SYMBOL(in6_dev_finish_destroy);
341
1da177e4
LT		 342static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
343{
344 struct inet6_dev *ndev;
345
346 ASSERT_RTNL();
347
348 if (dev->mtu < IPV6_MIN_MTU)
349 return NULL;
350
1ab1457c 351 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
322f74a4 352
1ab1457c
YH		 353 if (ndev == NULL)
354 return NULL;
322f74a4
IO		 355
356 rwlock_init(&ndev->lock);
357 ndev->dev = dev;
502a2ffd 358 INIT_LIST_HEAD(&ndev->addr_list);
359
c346dca1 360 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
322f74a4
IO		 361 ndev->cnf.mtu6 = dev->mtu;
362 ndev->cnf.sysctl = NULL;
363 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
364 if (ndev->nd_parms == NULL) {
365 kfree(ndev);
366 return NULL;
367 }
0187bdfb
BH		 368 if (ndev->cnf.forwarding)
369 dev_disable_lro(dev);
322f74a4
IO		 370 /* We refer to the device */
371 dev_hold(dev);
1da177e4 372
322f74a4
IO		 373 if (snmp6_alloc_dev(ndev) < 0) {
374 ADBG((KERN_WARNING
375 "%s(): cannot allocate memory for statistics; dev=%s.\n",
0dc47877 376 __func__, dev->name));
322f74a4
IO		 377 neigh_parms_release(&nd_tbl, ndev->nd_parms);
378 ndev->dead = 1;
379 in6_dev_finish_destroy(ndev);
380 return NULL;
381 }
1da177e4 382
322f74a4
IO		 383 if (snmp6_register_dev(ndev) < 0) {
384 ADBG((KERN_WARNING
385 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
0dc47877 386 __func__, dev->name));
322f74a4
IO		 387 neigh_parms_release(&nd_tbl, ndev->nd_parms);
388 ndev->dead = 1;
389 in6_dev_finish_destroy(ndev);
390 return NULL;
391 }
392
393 /* One reference from device. We must do this before
394 * we invoke __ipv6_regen_rndid().
395 */
396 in6_dev_hold(ndev);
1da177e4 397
1b34be74
YH		 398 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
399 ndev->cnf.accept_dad = -1;
400
b077d7ab
YH		 401#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
402 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
403 printk(KERN_INFO
404 "%s: Disabled Multicast RS\n",
405 dev->name);
406 ndev->cnf.rtr_solicits = 0;
407 }
408#endif
409
1da177e4 410#ifdef CONFIG_IPV6_PRIVACY
372e6c8f 411 INIT_LIST_HEAD(&ndev->tempaddr_list);
b24b8a24 412 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
322f74a4
IO		 413 if ((dev->flags&IFF_LOOPBACK) ||
414 dev->type == ARPHRD_TUNNEL ||
9625ed72 415 dev->type == ARPHRD_TUNNEL6 ||
0be669bb 416 dev->type == ARPHRD_SIT ||
0be669bb 417 dev->type == ARPHRD_NONE) {
322f74a4
IO		 418 printk(KERN_INFO
419 "%s: Disabled Privacy Extensions\n",
420 dev->name);
421 ndev->cnf.use_tempaddr = -1;
422 } else {
423 in6_dev_hold(ndev);
424 ipv6_regen_rndid((unsigned long) ndev);
425 }
1da177e4
LT		 426#endif
427
f24e3d65 428 if (netif_running(dev) && addrconf_qdisc_ok(dev))
53aadcc9
HX		 429 ndev->if_flags |= IF_READY;
430
322f74a4
IO		 431 ipv6_mc_init_dev(ndev);
432 ndev->tstamp = jiffies;
f52295a9 433 addrconf_sysctl_register(ndev);
30c4cf57
DS		 434 /* protected by rtnl_lock */
435 rcu_assign_pointer(dev->ip6_ptr, ndev);
d88ae4cc
YH		 436
437 /* Join all-node multicast group */
f3ee4010 438 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
d88ae4cc 439
1da177e4
LT		 440 return ndev;
441}
442
cee89473 443static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
1da177e4
LT		 444{
445 struct inet6_dev *idev;
446
447 ASSERT_RTNL();
448
e21e8467
SH		 449 idev = __in6_dev_get(dev);
450 if (!idev) {
451 idev = ipv6_add_dev(dev);
452 if (!idev)
1da177e4
LT		 453 return NULL;
454 }
c5e33bdd 455
1da177e4
LT		 456 if (dev->flags&IFF_UP)
457 ipv6_mc_up(idev);
458 return idev;
459}
460
461#ifdef CONFIG_SYSCTL
462static void dev_forward_change(struct inet6_dev *idev)
463{
464 struct net_device *dev;
465 struct inet6_ifaddr *ifa;
1da177e4
LT		 466
467 if (!idev)
468 return;
469 dev = idev->dev;
0187bdfb
BH		 470 if (idev->cnf.forwarding)
471 dev_disable_lro(dev);
1da177e4 472 if (dev && (dev->flags & IFF_MULTICAST)) {
1da177e4 473 if (idev->cnf.forwarding)
f3ee4010 474 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
1da177e4 475 else
f3ee4010 476 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
1da177e4 477 }
502a2ffd 478
479 list_for_each_entry(ifa, &idev->addr_list, if_list) {
2c12a74c
MW		 480 if (ifa->flags&IFA_F_TENTATIVE)
481 continue;
1da177e4
LT		 482 if (idev->cnf.forwarding)
483 addrconf_join_anycast(ifa);
484 else
485 addrconf_leave_anycast(ifa);
486 }
487}
488
489
e186932b 490static void addrconf_forward_change(struct net *net, __s32 newf)
1da177e4
LT		 491{
492 struct net_device *dev;
493 struct inet6_dev *idev;
494
c6d14c84
ED		 495 rcu_read_lock();
496 for_each_netdev_rcu(net, dev) {
1da177e4
LT		 497 idev = __in6_dev_get(dev);
498 if (idev) {
e186932b
PE		 499 int changed = (!idev->cnf.forwarding) ^ (!newf);
500 idev->cnf.forwarding = newf;
1da177e4
LT		 501 if (changed)
502 dev_forward_change(idev);
503 }
1da177e4 504 }
c6d14c84 505 rcu_read_unlock();
1da177e4 506}
c8fecf22 507
b325fddb 508static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
c8fecf22 509{
bff16c2f
PE		 510 struct net *net;
511
512 net = (struct net *)table->extra2;
441fc2a2 513 if (p == &net->ipv6.devconf_dflt->forwarding)
b325fddb
SH		 514 return 0;
515
88af182e
EB		 516 if (!rtnl_trylock()) {
517 /* Restore the original values before restarting */
518 *p = old;
5007392d 519 return restart_syscall();
88af182e 520 }
c8fecf22 521
e186932b
PE		 522 if (p == &net->ipv6.devconf_all->forwarding) {
523 __s32 newf = net->ipv6.devconf_all->forwarding;
524 net->ipv6.devconf_dflt->forwarding = newf;
525 addrconf_forward_change(net, newf);
c8fecf22
PE		 526 } else if ((!*p) ^ (!old))
527 dev_forward_change((struct inet6_dev *)table->extra1);
0187bdfb 528 rtnl_unlock();
c8fecf22
PE		 529
530 if (*p)
7b4da532 531 rt6_purge_dflt_routers(net);
b325fddb 532 return 1;
c8fecf22 533}
1da177e4
LT		 534#endif
535
5c578aed 536static void inet6_ifa_finish_destroy_rcu(struct rcu_head *head)
537{
538 struct inet6_ifaddr *ifp = container_of(head, struct inet6_ifaddr, rcu);
539 kfree(ifp);
540}
1da177e4 541
5c578aed 542/* Nobody refers to this ifaddr, destroy it */
1da177e4
LT		 543void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
544{
c2e21293 545 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
547b792c 546
1da177e4
LT		 547#ifdef NET_REFCNT_DEBUG
548 printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
549#endif
550
551 in6_dev_put(ifp->idev);
552
553 if (del_timer(&ifp->timer))
e21e8467 554 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp);
1da177e4 555
e9d3e084 556 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
e21e8467 557 pr_warning("Freeing alive inet6 address %p\n", ifp);
1da177e4
LT		 558 return;
559 }
560 dst_release(&ifp->rt->u.dst);
561
5c578aed 562 call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu);
1da177e4
LT		 563}
564
e55ffac6
BH		 565static void
566ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
567{
502a2ffd 568 struct list_head *p;
8a6ce0c0 569 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
e55ffac6
BH		 570
571 /*
572 * Each device address list is sorted in order of scope -
573 * global before linklocal.
574 */
502a2ffd 575 list_for_each(p, &idev->addr_list) {
576 struct inet6_ifaddr *ifa
577 = list_entry(p, struct inet6_ifaddr, if_list);
8a6ce0c0 578 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
e55ffac6
BH		 579 break;
580 }
581
b54c9b98 582 list_add_tail(&ifp->if_list, p);
e55ffac6
BH		 583}
584
3a88a81d 585static u32 ipv6_addr_hash(const struct in6_addr *addr)
3eb84f49 586{
3eb84f49
YH		 587 /*
588 * We perform the hash function over the last 64 bits of the address
589 * This will include the IEEE address token on links that support it.
590 */
0eae88f3
ED		 591 return jhash_2words((__force u32)addr->s6_addr32[2],
592 (__force u32)addr->s6_addr32[3], 0)
3a88a81d 593 & (IN6_ADDR_HSIZE - 1);
3eb84f49
YH		 594}
595
1da177e4
LT		 596/* On success it returns ifp with increased reference count */
597
598static struct inet6_ifaddr *
599ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
e431b8c0 600 int scope, u32 flags)
1da177e4
LT		 601{
602 struct inet6_ifaddr *ifa = NULL;
603 struct rt6_info *rt;
3a88a81d 604 unsigned int hash;
1da177e4 605 int err = 0;
d68b8270
YH		 606 int addr_type = ipv6_addr_type(addr);
607
608 if (addr_type == IPV6_ADDR_ANY ||
609 addr_type & IPV6_ADDR_MULTICAST ||
610 (!(idev->dev->flags & IFF_LOOPBACK) &&
611 addr_type & IPV6_ADDR_LOOPBACK))
612 return ERR_PTR(-EADDRNOTAVAIL);
1da177e4 613
8814c4b5 614 rcu_read_lock_bh();
1da177e4
LT		 615 if (idev->dead) {
616 err = -ENODEV; /*XXX*/
617 goto out2;
618 }
619
56d417b1 620 if (idev->cnf.disable_ipv6) {
9bdd8d40
BH		 621 err = -EACCES;
622 goto out2;
623 }
624
5c578aed 625 spin_lock(&addrconf_hash_lock);
1da177e4
LT		 626
627 /* Ignore adding duplicate addresses on an interface */
c346dca1 628 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
1da177e4
LT		 629 ADBG(("ipv6_add_addr: already assigned\n"));
630 err = -EEXIST;
631 goto out;
632 }
633
322f74a4 634 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
1da177e4
LT		 635
636 if (ifa == NULL) {
637 ADBG(("ipv6_add_addr: malloc failed\n"));
638 err = -ENOBUFS;
639 goto out;
640 }
641
642 rt = addrconf_dst_alloc(idev, addr, 0);
643 if (IS_ERR(rt)) {
644 err = PTR_ERR(rt);
645 goto out;
646 }
647
1da177e4
LT		 648 ipv6_addr_copy(&ifa->addr, addr);
649
650 spin_lock_init(&ifa->lock);
e9d3e084 651 spin_lock_init(&ifa->state_lock);
1da177e4 652 init_timer(&ifa->timer);
c2e21293 653 INIT_HLIST_NODE(&ifa->addr_lst);
1da177e4
LT		 654 ifa->timer.data = (unsigned long) ifa;
655 ifa->scope = scope;
656 ifa->prefix_len = pfxlen;
657 ifa->flags = flags | IFA_F_TENTATIVE;
658 ifa->cstamp = ifa->tstamp = jiffies;
659
57f5f544
KF		 660 ifa->rt = rt;
661
95c385b4
NH		 662 /*
663 * part one of RFC 4429, section 3.3
664 * We should not configure an address as
665 * optimistic if we do not yet know the link
666 * layer address of our nexhop router
667 */
668
669 if (rt->rt6i_nexthop == NULL)
670 ifa->flags &= ~IFA_F_OPTIMISTIC;
671
1da177e4
LT		 672 ifa->idev = idev;
673 in6_dev_hold(idev);
674 /* For caller */
675 in6_ifa_hold(ifa);
676
677 /* Add to big hash table */
678 hash = ipv6_addr_hash(addr);
679
5c578aed 680 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
5c578aed 681 spin_unlock(&addrconf_hash_lock);
1da177e4
LT		 682
683 write_lock(&idev->lock);
684 /* Add to inet6_dev unicast addr list. */
e55ffac6 685 ipv6_link_dev_addr(idev, ifa);
1da177e4
LT		 686
687#ifdef CONFIG_IPV6_PRIVACY
688 if (ifa->flags&IFA_F_TEMPORARY) {
372e6c8f 689 list_add(&ifa->tmp_list, &idev->tempaddr_list);
1da177e4
LT		 690 in6_ifa_hold(ifa);
691 }
692#endif
693
1da177e4
LT		 694 in6_ifa_hold(ifa);
695 write_unlock(&idev->lock);
696out2:
8814c4b5 697 rcu_read_unlock_bh();
1da177e4 698
fd92833a 699 if (likely(err == 0))
e041c683 700 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
1da177e4
LT		 701 else {
702 kfree(ifa);
703 ifa = ERR_PTR(err);
704 }
705
706 return ifa;
707out:
5c578aed 708 spin_unlock(&addrconf_hash_lock);
1da177e4
LT		 709 goto out2;
710}
711
712/* This function wants to get referenced ifp and releases it before return */
713
714static void ipv6_del_addr(struct inet6_ifaddr *ifp)
715{
502a2ffd 716 struct inet6_ifaddr *ifa, *ifn;
1da177e4
LT		 717 struct inet6_dev *idev = ifp->idev;
718 int hash;
719 int deleted = 0, onlink = 0;
720 unsigned long expires = jiffies;
721
722 hash = ipv6_addr_hash(&ifp->addr);
723
e9d3e084 724 ifp->state = INET6_IFADDR_STATE_DEAD;
1da177e4 725
5c578aed 726 spin_lock_bh(&addrconf_hash_lock);
727 hlist_del_init_rcu(&ifp->addr_lst);
5c578aed 728 spin_unlock_bh(&addrconf_hash_lock);
1da177e4
LT		 729
730 write_lock_bh(&idev->lock);
731#ifdef CONFIG_IPV6_PRIVACY
732 if (ifp->flags&IFA_F_TEMPORARY) {
372e6c8f 733 list_del(&ifp->tmp_list);
734 if (ifp->ifpub) {
735 in6_ifa_put(ifp->ifpub);
736 ifp->ifpub = NULL;
1da177e4 737 }
372e6c8f 738 __in6_ifa_put(ifp);
1da177e4
LT		 739 }
740#endif
741
502a2ffd 742 list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
1da177e4 743 if (ifa == ifp) {
502a2ffd 744 list_del_init(&ifp->if_list);
1da177e4 745 __in6_ifa_put(ifp);
502a2ffd 746
1da177e4
LT		 747 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
748 break;
749 deleted = 1;
1d142804 750 continue;
1da177e4
LT		 751 } else if (ifp->flags & IFA_F_PERMANENT) {
752 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
753 ifp->prefix_len)) {
754 if (ifa->flags & IFA_F_PERMANENT) {
755 onlink = 1;
756 if (deleted)
757 break;
758 } else {
759 unsigned long lifetime;
760
761 if (!onlink)
762 onlink = -1;
763
764 spin_lock(&ifa->lock);
4bed72e4
YH		 765
766 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
767 /*
768 * Note: Because this address is
769 * not permanent, lifetime <
770 * LONG_MAX / HZ here.
771 */
1da177e4
LT		 772 if (time_before(expires,
773 ifa->tstamp + lifetime * HZ))
774 expires = ifa->tstamp + lifetime * HZ;
775 spin_unlock(&ifa->lock);
776 }
777 }
778 }
779 }
780 write_unlock_bh(&idev->lock);
781
b2238566
AV		 782 addrconf_del_timer(ifp);
783
1da177e4
LT		 784 ipv6_ifa_notify(RTM_DELADDR, ifp);
785
e041c683 786 atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
1da177e4 787
1da177e4
LT		 788 /*
789 * Purge or update corresponding prefix
790 *
791 * 1) we don't purge prefix here if address was not permanent.
792 * prefix is managed by its own lifetime.
793 * 2) if there're no addresses, delete prefix.
794 * 3) if there're still other permanent address(es),
795 * corresponding prefix is still permanent.
796 * 4) otherwise, update prefix lifetime to the
797 * longest valid lifetime among the corresponding
798 * addresses on the device.
799 * Note: subsequent RA will update lifetime.
800 *
801 * --yoshfuji
802 */
803 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
804 struct in6_addr prefix;
805 struct rt6_info *rt;
c346dca1 806 struct net *net = dev_net(ifp->idev->dev);
1da177e4 807 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
6fda7350 808 rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
1da177e4 809
2b5ead46 810 if (rt && addrconf_is_prefix_route(rt)) {
1da177e4 811 if (onlink == 0) {
e0a1ad73 812 ip6_del_rt(rt);
1da177e4
LT		 813 rt = NULL;
814 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
815 rt->rt6i_expires = expires;
816 rt->rt6i_flags |= RTF_EXPIRES;
817 }
818 }
819 dst_release(&rt->u.dst);
820 }
821
822 in6_ifa_put(ifp);
823}
824
825#ifdef CONFIG_IPV6_PRIVACY
826static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
827{
828 struct inet6_dev *idev = ifp->idev;
829 struct in6_addr addr, *tmpaddr;
830 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
eac55bf9 831 unsigned long regen_advance;
1da177e4
LT		 832 int tmp_plen;
833 int ret = 0;
834 int max_addresses;
95c385b4 835 u32 addr_flags;
1da177e4
LT		 836
837 write_lock(&idev->lock);
838 if (ift) {
839 spin_lock_bh(&ift->lock);
840 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
841 spin_unlock_bh(&ift->lock);
842 tmpaddr = &addr;
843 } else {
844 tmpaddr = NULL;
845 }
846retry:
847 in6_dev_hold(idev);
848 if (idev->cnf.use_tempaddr <= 0) {
849 write_unlock(&idev->lock);
850 printk(KERN_INFO
851 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
852 in6_dev_put(idev);
853 ret = -1;
854 goto out;
855 }
856 spin_lock_bh(&ifp->lock);
857 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
858 idev->cnf.use_tempaddr = -1; /*XXX*/
859 spin_unlock_bh(&ifp->lock);
860 write_unlock(&idev->lock);
861 printk(KERN_WARNING
862 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
863 in6_dev_put(idev);
864 ret = -1;
865 goto out;
866 }
867 in6_ifa_hold(ifp);
868 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
869 if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
870 spin_unlock_bh(&ifp->lock);
871 write_unlock(&idev->lock);
872 printk(KERN_WARNING
873 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
874 in6_ifa_put(ifp);
875 in6_dev_put(idev);
876 ret = -1;
877 goto out;
878 }
879 memcpy(&addr.s6_addr[8], idev->rndid, 8);
880 tmp_valid_lft = min_t(__u32,
881 ifp->valid_lft,
882 idev->cnf.temp_valid_lft);
1ab1457c
YH		 883 tmp_prefered_lft = min_t(__u32,
884 ifp->prefered_lft,
1da177e4
LT		 885 idev->cnf.temp_prefered_lft - desync_factor / HZ);
886 tmp_plen = ifp->prefix_len;
887 max_addresses = idev->cnf.max_addresses;
888 tmp_cstamp = ifp->cstamp;
889 tmp_tstamp = ifp->tstamp;
890 spin_unlock_bh(&ifp->lock);
891
eac55bf9
BB		 892 regen_advance = idev->cnf.regen_max_retry *
893 idev->cnf.dad_transmits *
894 idev->nd_parms->retrans_time / HZ;
1da177e4 895 write_unlock(&idev->lock);
95c385b4 896
eac55bf9
BB		 897 /* A temporary address is created only if this calculated Preferred
898 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
899 * an implementation must not create a temporary address with a zero
900 * Preferred Lifetime.
901 */
902 if (tmp_prefered_lft <= regen_advance) {
903 in6_ifa_put(ifp);
904 in6_dev_put(idev);
905 ret = -1;
906 goto out;
907 }
908
95c385b4
NH		 909 addr_flags = IFA_F_TEMPORARY;
910 /* set in addrconf_prefix_rcv() */
911 if (ifp->flags & IFA_F_OPTIMISTIC)
912 addr_flags |= IFA_F_OPTIMISTIC;
913
1da177e4 914 ift = !max_addresses ||
1ab1457c 915 ipv6_count_addresses(idev) < max_addresses ?
1da177e4 916 ipv6_add_addr(idev, &addr, tmp_plen,
95c385b4
NH		 917 ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
918 addr_flags) : NULL;
1da177e4
LT		 919 if (!ift || IS_ERR(ift)) {
920 in6_ifa_put(ifp);
921 in6_dev_put(idev);
922 printk(KERN_INFO
923 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
924 tmpaddr = &addr;
925 write_lock(&idev->lock);
926 goto retry;
927 }
928
929 spin_lock_bh(&ift->lock);
930 ift->ifpub = ifp;
931 ift->valid_lft = tmp_valid_lft;
932 ift->prefered_lft = tmp_prefered_lft;
933 ift->cstamp = tmp_cstamp;
934 ift->tstamp = tmp_tstamp;
935 spin_unlock_bh(&ift->lock);
936
937 addrconf_dad_start(ift, 0);
938 in6_ifa_put(ift);
939 in6_dev_put(idev);
940out:
941 return ret;
942}
943#endif
944
945/*
072047e4 946 * Choose an appropriate source address (RFC3484)
1da177e4 947 */
a9b05723
YH		 948enum {
949 IPV6_SADDR_RULE_INIT = 0,
950 IPV6_SADDR_RULE_LOCAL,
951 IPV6_SADDR_RULE_SCOPE,
952 IPV6_SADDR_RULE_PREFERRED,
953#ifdef CONFIG_IPV6_MIP6
954 IPV6_SADDR_RULE_HOA,
955#endif
956 IPV6_SADDR_RULE_OIF,
957 IPV6_SADDR_RULE_LABEL,
958#ifdef CONFIG_IPV6_PRIVACY
959 IPV6_SADDR_RULE_PRIVACY,
960#endif
961 IPV6_SADDR_RULE_ORCHID,
962 IPV6_SADDR_RULE_PREFIX,
963 IPV6_SADDR_RULE_MAX
964};
965
072047e4 966struct ipv6_saddr_score {
a9b05723
YH		 967 int rule;
968 int addr_type;
969 struct inet6_ifaddr *ifa;
970 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
971 int scopedist;
972 int matchlen;
072047e4
YH		 973};
974
a9b05723 975struct ipv6_saddr_dst {
9acd9f3a 976 const struct in6_addr *addr;
a9b05723
YH		 977 int ifindex;
978 int scope;
979 int label;
7cbca67c 980 unsigned int prefs;
a9b05723 981};
072047e4 982
b6f99a21 983static inline int ipv6_saddr_preferred(int type)
1da177e4 984{
45bb0060 985 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
072047e4
YH		 986 return 1;
987 return 0;
1da177e4
LT		 988}
989
3de23255
BT		 990static int ipv6_get_saddr_eval(struct net *net,
991 struct ipv6_saddr_score *score,
a9b05723
YH		 992 struct ipv6_saddr_dst *dst,
993 int i)
994{
995 int ret;
996
997 if (i <= score->rule) {
998 switch (i) {
999 case IPV6_SADDR_RULE_SCOPE:
1000 ret = score->scopedist;
1001 break;
1002 case IPV6_SADDR_RULE_PREFIX:
1003 ret = score->matchlen;
1004 break;
1005 default:
1006 ret = !!test_bit(i, score->scorebits);
1007 }
1008 goto out;
1009 }
1010
1011 switch (i) {
1012 case IPV6_SADDR_RULE_INIT:
1013 /* Rule 0: remember if hiscore is not ready yet */
1014 ret = !!score->ifa;
1015 break;
1016 case IPV6_SADDR_RULE_LOCAL:
1017 /* Rule 1: Prefer same address */
1018 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1019 break;
1020 case IPV6_SADDR_RULE_SCOPE:
1021 /* Rule 2: Prefer appropriate scope
1022 *
1023 * ret
1024 * ^
1025 * -1 | d 15
1026 * ---+--+-+---> scope
1027 * |
1028 * | d is scope of the destination.
1029 * B-d | \
1030 * | \ <- smaller scope is better if
1031 * B-15 | \ if scope is enough for destinaion.
1032 * | ret = B - scope (-1 <= scope >= d <= 15).
1033 * d-C-1 | /
1034 * |/ <- greater is better
1035 * -C / if scope is not enough for destination.
1036 * /| ret = scope - C (-1 <= d < scope <= 15).
1037 *
1038 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1039 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1040 * Assume B = 0 and we get C > 29.
1041 */
1042 ret = __ipv6_addr_src_scope(score->addr_type);
1043 if (ret >= dst->scope)
1044 ret = -ret;
1045 else
1046 ret -= 128; /* 30 is enough */
1047 score->scopedist = ret;
1048 break;
1049 case IPV6_SADDR_RULE_PREFERRED:
1050 /* Rule 3: Avoid deprecated and optimistic addresses */
1051 ret = ipv6_saddr_preferred(score->addr_type) ||
1052 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1053 break;
1054#ifdef CONFIG_IPV6_MIP6
1055 case IPV6_SADDR_RULE_HOA:
7cbca67c 1056 {
a9b05723 1057 /* Rule 4: Prefer home address */
7cbca67c
YH		 1058 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1059 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
a9b05723 1060 break;
7cbca67c 1061 }
a9b05723
YH		 1062#endif
1063 case IPV6_SADDR_RULE_OIF:
1064 /* Rule 5: Prefer outgoing interface */
1065 ret = (!dst->ifindex ||
1066 dst->ifindex == score->ifa->idev->dev->ifindex);
1067 break;
1068 case IPV6_SADDR_RULE_LABEL:
1069 /* Rule 6: Prefer matching label */
3de23255
BT		 1070 ret = ipv6_addr_label(net,
1071 &score->ifa->addr, score->addr_type,
a9b05723
YH		 1072 score->ifa->idev->dev->ifindex) == dst->label;
1073 break;
1074#ifdef CONFIG_IPV6_PRIVACY
1075 case IPV6_SADDR_RULE_PRIVACY:
7cbca67c 1076 {
a9b05723
YH		 1077 /* Rule 7: Prefer public address
1078 * Note: prefer temprary address if use_tempaddr >= 2
1079 */
7cbca67c
YH		 1080 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1081 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1082 score->ifa->idev->cnf.use_tempaddr >= 2;
1083 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
a9b05723 1084 break;
7cbca67c 1085 }
a9b05723
YH		 1086#endif
1087 case IPV6_SADDR_RULE_ORCHID:
1088 /* Rule 8-: Prefer ORCHID vs ORCHID or
1089 * non-ORCHID vs non-ORCHID
1090 */
1091 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1092 ipv6_addr_orchid(dst->addr));
1093 break;
1094 case IPV6_SADDR_RULE_PREFIX:
1095 /* Rule 8: Use longest matching prefix */
1096 score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,
1097 dst->addr);
1098 break;
1099 default:
1100 ret = 0;
1101 }
1102
1103 if (ret)
1104 __set_bit(i, score->scorebits);
1105 score->rule = i;
1106out:
1107 return ret;
1108}
1109
191cd582 1110int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
9acd9f3a 1111 const struct in6_addr *daddr, unsigned int prefs,
7cbca67c 1112 struct in6_addr *saddr)
1da177e4 1113{
a9b05723
YH		 1114 struct ipv6_saddr_score scores[2],
1115 *score = &scores[0], *hiscore = &scores[1];
a9b05723 1116 struct ipv6_saddr_dst dst;
072047e4 1117 struct net_device *dev;
a9b05723 1118 int dst_type;
1da177e4 1119
a9b05723
YH		 1120 dst_type = __ipv6_addr_type(daddr);
1121 dst.addr = daddr;
1122 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1123 dst.scope = __ipv6_addr_src_scope(dst_type);
3de23255 1124 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
7cbca67c 1125 dst.prefs = prefs;
a9b05723
YH		 1126
1127 hiscore->rule = -1;
1128 hiscore->ifa = NULL;
1da177e4 1129
8814c4b5 1130 rcu_read_lock();
1da177e4 1131
c6d14c84 1132 for_each_netdev_rcu(net, dev) {
072047e4 1133 struct inet6_dev *idev;
072047e4 1134
a9b05723 1135 /* Candidate Source Address (section 4)
072047e4
YH		 1136 * - multicast and link-local destination address,
1137 * the set of candidate source address MUST only
1138 * include addresses assigned to interfaces
1139 * belonging to the same link as the outgoing
1140 * interface.
1141 * (- For site-local destination addresses, the
1142 * set of candidate source addresses MUST only
1143 * include addresses assigned to interfaces
1144 * belonging to the same site as the outgoing
1145 * interface.)
1146 */
a9b05723
YH		 1147 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1148 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1149 dst.ifindex && dev->ifindex != dst.ifindex)
072047e4 1150 continue;
1da177e4 1151
1da177e4 1152 idev = __in6_dev_get(dev);
072047e4
YH		 1153 if (!idev)
1154 continue;
1155
1156 read_lock_bh(&idev->lock);
502a2ffd 1157 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
a9b05723 1158 int i;
072047e4 1159
a9b05723 1160 /*
6b3ae80a
YH		 1161 * - Tentative Address (RFC2462 section 5.4)
1162 * - A tentative address is not considered
1163 * "assigned to an interface" in the traditional
95c385b4 1164 * sense, unless it is also flagged as optimistic.
6b3ae80a 1165 * - Candidate Source Address (section 4)
072047e4
YH		 1166 * - In any case, anycast addresses, multicast
1167 * addresses, and the unspecified address MUST
1168 * NOT be included in a candidate set.
1169 */
a9b05723
YH		 1170 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1171 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
6b3ae80a 1172 continue;
a9b05723
YH		 1173
1174 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1175
1176 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1177 score->addr_type & IPV6_ADDR_MULTICAST)) {
072047e4 1178 LIMIT_NETDEBUG(KERN_DEBUG
3b6d821c 1179 "ADDRCONF: unspecified / multicast address "
072047e4
YH		 1180 "assigned as unicast address on %s",
1181 dev->name);
1182 continue;
1183 }
1184
a9b05723
YH		 1185 score->rule = -1;
1186 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1187
1188 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1189 int minihiscore, miniscore;
1190
3de23255
BT		 1191 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1192 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
a9b05723
YH		 1193
1194 if (minihiscore > miniscore) {
1195 if (i == IPV6_SADDR_RULE_SCOPE &&
1196 score->scopedist > 0) {
1197 /*
1198 * special case:
1199 * each remaining entry
1200 * has too small (not enough)
1201 * scope, because ifa entries
1202 * are sorted by their scope
1203 * values.
1204 */
1205 goto try_nextdev;
1206 }
1207 break;
1208 } else if (minihiscore < miniscore) {
a9b05723
YH		 1209 if (hiscore->ifa)
1210 in6_ifa_put(hiscore->ifa);
1211
1212 in6_ifa_hold(score->ifa);
1213
a0bffffc 1214 swap(hiscore, score);
a9b05723
YH		 1215
1216 /* restore our iterator */
1217 score->ifa = hiscore->ifa;
1218
1219 break;
1da177e4 1220 }
072047e4 1221 }
1da177e4 1222 }
a9b05723 1223try_nextdev:
072047e4 1224 read_unlock_bh(&idev->lock);
1da177e4 1225 }
8814c4b5 1226 rcu_read_unlock();
1da177e4 1227
a9b05723 1228 if (!hiscore->ifa)
072047e4 1229 return -EADDRNOTAVAIL;
1ab1457c 1230
a9b05723
YH		 1231 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1232 in6_ifa_put(hiscore->ifa);
072047e4 1233 return 0;
1da177e4 1234}
5e5f3f0f 1235EXPORT_SYMBOL(ipv6_dev_get_saddr);
1da177e4 1236
95c385b4
NH		 1237int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1238 unsigned char banned_flags)
1da177e4
LT		 1239{
1240 struct inet6_dev *idev;
1241 int err = -EADDRNOTAVAIL;
1242
8814c4b5 1243 rcu_read_lock();
e21e8467
SH		 1244 idev = __in6_dev_get(dev);
1245 if (idev) {
1da177e4
LT		 1246 struct inet6_ifaddr *ifp;
1247
1248 read_lock_bh(&idev->lock);
502a2ffd 1249 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1250 if (ifp->scope == IFA_LINK &&
1251 !(ifp->flags & banned_flags)) {
1da177e4
LT		 1252 ipv6_addr_copy(addr, &ifp->addr);
1253 err = 0;
1254 break;
1255 }
1256 }
1257 read_unlock_bh(&idev->lock);
1258 }
8814c4b5 1259 rcu_read_unlock();
1da177e4
LT		 1260 return err;
1261}
1262
1263static int ipv6_count_addresses(struct inet6_dev *idev)
1264{
1265 int cnt = 0;
1266 struct inet6_ifaddr *ifp;
1267
1268 read_lock_bh(&idev->lock);
502a2ffd 1269 list_for_each_entry(ifp, &idev->addr_list, if_list)
1da177e4
LT		 1270 cnt++;
1271 read_unlock_bh(&idev->lock);
1272 return cnt;
1273}
1274
bfeade08
DL		 1275int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
1276 struct net_device *dev, int strict)
1da177e4 1277{
eedf042a 1278 struct inet6_ifaddr *ifp;
c2e21293 1279 struct hlist_node *node;
3a88a81d 1280 unsigned int hash = ipv6_addr_hash(addr);
1da177e4 1281
5c578aed 1282 rcu_read_lock_bh();
1283 hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1284 if (!net_eq(dev_net(ifp->idev->dev), net))
bfeade08 1285 continue;
1da177e4 1286 if (ipv6_addr_equal(&ifp->addr, addr) &&
eedf042a
SH		 1287 !(ifp->flags&IFA_F_TENTATIVE) &&
1288 (dev == NULL || ifp->idev->dev == dev ||
1289 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1290 rcu_read_unlock_bh();
1291 return 1;
1da177e4
LT		 1292 }
1293 }
5c578aed 1294
eedf042a
SH		 1295 rcu_read_unlock_bh();
1296 return 0;
1da177e4 1297}
7159039a
YH		 1298EXPORT_SYMBOL(ipv6_chk_addr);
1299
3e81c6da
DM		 1300static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1301 struct net_device *dev)
1da177e4 1302{
3e81c6da 1303 unsigned int hash = ipv6_addr_hash(addr);
c2e21293 1304 struct inet6_ifaddr *ifp;
1305 struct hlist_node *node;
1da177e4 1306
c2e21293 1307 hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1308 if (!net_eq(dev_net(ifp->idev->dev), net))
06bfe655 1309 continue;
1da177e4
LT		 1310 if (ipv6_addr_equal(&ifp->addr, addr)) {
1311 if (dev == NULL || ifp->idev->dev == dev)
3e81c6da 1312 return true;
1da177e4
LT		 1313 }
1314 }
3e81c6da 1315 return false;
1da177e4
LT		 1316}
1317
52eeeb84
YH		 1318int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
1319{
1320 struct inet6_dev *idev;
1321 struct inet6_ifaddr *ifa;
1322 int onlink;
1323
1324 onlink = 0;
1325 rcu_read_lock();
1326 idev = __in6_dev_get(dev);
1327 if (idev) {
1328 read_lock_bh(&idev->lock);
502a2ffd 1329 list_for_each_entry(ifa, &idev->addr_list, if_list) {
52eeeb84
YH		 1330 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1331 ifa->prefix_len);
1332 if (onlink)
1333 break;
1334 }
1335 read_unlock_bh(&idev->lock);
1336 }
1337 rcu_read_unlock();
1338 return onlink;
1339}
1340
1341EXPORT_SYMBOL(ipv6_chk_prefix);
1342
9acd9f3a 1343struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1cab3da6 1344 struct net_device *dev, int strict)
1da177e4 1345{
b79d1d54 1346 struct inet6_ifaddr *ifp, *result = NULL;
3a88a81d 1347 unsigned int hash = ipv6_addr_hash(addr);
b79d1d54 1348 struct hlist_node *node;
1da177e4 1349
5c578aed 1350 rcu_read_lock_bh();
4f70ecca 1351 hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) {
878628fb 1352 if (!net_eq(dev_net(ifp->idev->dev), net))
1cab3da6 1353 continue;
1da177e4
LT		 1354 if (ipv6_addr_equal(&ifp->addr, addr)) {
1355 if (dev == NULL || ifp->idev->dev == dev ||
1356 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
b79d1d54 1357 result = ifp;
1da177e4
LT		 1358 in6_ifa_hold(ifp);
1359 break;
1360 }
1361 }
1362 }
5c578aed 1363 rcu_read_unlock_bh();
1da177e4 1364
b79d1d54 1365 return result;
1da177e4
LT		 1366}
1367
1da177e4
LT		 1368/* Gets referenced address, destroys ifaddr */
1369
cc411d0b 1370static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
1da177e4 1371{
1da177e4
LT		 1372 if (ifp->flags&IFA_F_PERMANENT) {
1373 spin_lock_bh(&ifp->lock);
1374 addrconf_del_timer(ifp);
1375 ifp->flags |= IFA_F_TENTATIVE;
cc411d0b
BH		 1376 if (dad_failed)
1377 ifp->flags |= IFA_F_DADFAILED;
1da177e4 1378 spin_unlock_bh(&ifp->lock);
e2577a06
HX		 1379 if (dad_failed)
1380 ipv6_ifa_notify(0, ifp);
1da177e4
LT		 1381 in6_ifa_put(ifp);
1382#ifdef CONFIG_IPV6_PRIVACY
1383 } else if (ifp->flags&IFA_F_TEMPORARY) {
1384 struct inet6_ifaddr *ifpub;
1385 spin_lock_bh(&ifp->lock);
1386 ifpub = ifp->ifpub;
1387 if (ifpub) {
1388 in6_ifa_hold(ifpub);
1389 spin_unlock_bh(&ifp->lock);
1390 ipv6_create_tempaddr(ifpub, ifp);
1391 in6_ifa_put(ifpub);
1392 } else {
1393 spin_unlock_bh(&ifp->lock);
1394 }
1395 ipv6_del_addr(ifp);
1396#endif
1397 } else
1398 ipv6_del_addr(ifp);
1399}
1400
3c21edbd
YH		 1401void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1402{
1b34be74 1403 struct inet6_dev *idev = ifp->idev;
9bdd8d40
BH		 1404
1405 if (net_ratelimit())
0522fea6
JR		 1406 printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n",
1407 ifp->idev->dev->name, &ifp->addr);
9bdd8d40 1408
1b34be74
YH		 1409 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1410 struct in6_addr addr;
1411
1412 addr.s6_addr32[0] = htonl(0xfe800000);
1413 addr.s6_addr32[1] = 0;
1414
1415 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1416 ipv6_addr_equal(&ifp->addr, &addr)) {
1417 /* DAD failed for link-local based on MAC address */
1418 idev->cnf.disable_ipv6 = 1;
9bdd8d40
BH		 1419
1420 printk(KERN_INFO "%s: IPv6 being disabled!\n",
1421 ifp->idev->dev->name);
1b34be74
YH		 1422 }
1423 }
1424
cc411d0b 1425 addrconf_dad_stop(ifp, 1);
3c21edbd 1426}
1da177e4
LT		 1427
1428/* Join to solicited addr multicast group. */
1429
1430void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
1431{
1432 struct in6_addr maddr;
1433
1434 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1435 return;
1436
1437 addrconf_addr_solict_mult(addr, &maddr);
1438 ipv6_dev_mc_inc(dev, &maddr);
1439}
1440
1441void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
1442{
1443 struct in6_addr maddr;
1444
1445 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1446 return;
1447
1448 addrconf_addr_solict_mult(addr, &maddr);
1449 __ipv6_dev_mc_dec(idev, &maddr);
1450}
1451
20380731 1452static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1453{
1454 struct in6_addr addr;
1455 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1456 if (ipv6_addr_any(&addr))
1457 return;
1458 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1459}
1460
20380731 1461static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1da177e4
LT		 1462{
1463 struct in6_addr addr;
1464 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1465 if (ipv6_addr_any(&addr))
1466 return;
1467 __ipv6_dev_ac_dec(ifp->idev, &addr);
1468}
1469
073a8e0e
YH		 1470static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1471{
1472 if (dev->addr_len != ETH_ALEN)
1473 return -1;
1474 memcpy(eui, dev->dev_addr, 3);
1475 memcpy(eui + 5, dev->dev_addr + 3, 3);
1476
1477 /*
1478 * The zSeries OSA network cards can be shared among various
1479 * OS instances, but the OSA cards have only one MAC address.
1480 * This leads to duplicate address conflicts in conjunction
1481 * with IPv6 if more than one instance uses the same card.
1482 *
1483 * The driver for these cards can deliver a unique 16-bit
1484 * identifier for each instance sharing the same card. It is
1485 * placed instead of 0xFFFE in the interface identifier. The
1486 * "u" bit of the interface identifier is not inverted in this
1487 * case. Hence the resulting interface identifier has local
1488 * scope according to RFC2373.
1489 */
1490 if (dev->dev_id) {
1491 eui[3] = (dev->dev_id >> 8) & 0xFF;
1492 eui[4] = dev->dev_id & 0xFF;
1493 } else {
1494 eui[3] = 0xFF;
1495 eui[4] = 0xFE;
1496 eui[0] ^= 2;
1497 }
1498 return 0;
1499}
1500
1501static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1502{
1503 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1504 if (dev->addr_len != ARCNET_ALEN)
1505 return -1;
1506 memset(eui, 0, 7);
1507 eui[7] = *(u8*)dev->dev_addr;
1508 return 0;
1509}
1510
1511static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1512{
1513 if (dev->addr_len != INFINIBAND_ALEN)
1514 return -1;
1515 memcpy(eui, dev->dev_addr + 12, 8);
1516 eui[0] |= 2;
1517 return 0;
1518}
1519
dfd982ba
YH		 1520int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1521{
9af28511
SH		 1522 if (addr == 0)
1523 return -1;
dfd982ba
YH		 1524 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1525 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1526 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1527 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1528 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1529 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1530 eui[1] = 0;
1531 eui[2] = 0x5E;
1532 eui[3] = 0xFE;
1533 memcpy(eui + 4, &addr, 4);
1534 return 0;
1535}
1536EXPORT_SYMBOL(__ipv6_isatap_ifid);
1537
1538static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1539{
1540 if (dev->priv_flags & IFF_ISATAP)
1541 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1542 return -1;
1543}
1544
1da177e4
LT		 1545static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1546{
1547 switch (dev->type) {
1548 case ARPHRD_ETHER:
1549 case ARPHRD_FDDI:
1550 case ARPHRD_IEEE802_TR:
073a8e0e 1551 return addrconf_ifid_eui48(eui, dev);
1da177e4 1552 case ARPHRD_ARCNET:
073a8e0e 1553 return addrconf_ifid_arcnet(eui, dev);
1da177e4 1554 case ARPHRD_INFINIBAND:
073a8e0e 1555 return addrconf_ifid_infiniband(eui, dev);
c7dc89c0 1556 case ARPHRD_SIT:
dfd982ba 1557 return addrconf_ifid_sit(eui, dev);
1da177e4
LT		 1558 }
1559 return -1;
1560}
1561
1562static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1563{
1564 int err = -1;
1565 struct inet6_ifaddr *ifp;
1566
1567 read_lock_bh(&idev->lock);
502a2ffd 1568 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1da177e4
LT		 1569 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1570 memcpy(eui, ifp->addr.s6_addr+8, 8);
1571 err = 0;
1572 break;
1573 }
1574 }
1575 read_unlock_bh(&idev->lock);
1576 return err;
1577}
1578
1579#ifdef CONFIG_IPV6_PRIVACY
1580/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1581static int __ipv6_regen_rndid(struct inet6_dev *idev)
1582{
1da177e4 1583regen:
955189ef 1584 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1da177e4 1585 idev->rndid[0] &= ~0x02;
1da177e4
LT		 1586
1587 /*
1588 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1589 * check if generated address is not inappropriate
1590 *
1591 * - Reserved subnet anycast (RFC 2526)
1592 * 11111101 11....11 1xxxxxxx
c7dc89c0 1593 * - ISATAP (RFC4214) 6.1
1da177e4
LT		 1594 * 00-00-5E-FE-xx-xx-xx-xx
1595 * - value 0
1596 * - XXX: already assigned to an address on the device
1597 */
1ab1457c 1598 if (idev->rndid[0] == 0xfd &&
1da177e4
LT		 1599 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1600 (idev->rndid[7]&0x80))
1601 goto regen;
1602 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1603 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1604 goto regen;
1605 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1606 goto regen;
1607 }
1608
1609 return 0;
1610}
1611
1612static void ipv6_regen_rndid(unsigned long data)
1613{
1614 struct inet6_dev *idev = (struct inet6_dev *) data;
1615 unsigned long expires;
1616
8814c4b5 1617 rcu_read_lock_bh();
1da177e4
LT		 1618 write_lock_bh(&idev->lock);
1619
1620 if (idev->dead)
1621 goto out;
1622
1623 if (__ipv6_regen_rndid(idev) < 0)
1624 goto out;
1ab1457c 1625
1da177e4 1626 expires = jiffies +
1ab1457c 1627 idev->cnf.temp_prefered_lft * HZ -
1da177e4
LT		 1628 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
1629 if (time_before(expires, jiffies)) {
1630 printk(KERN_WARNING
1631 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1632 idev->dev->name);
1633 goto out;
1634 }
1635
1636 if (!mod_timer(&idev->regen_timer, expires))
1637 in6_dev_hold(idev);
1638
1639out:
1640 write_unlock_bh(&idev->lock);
8814c4b5 1641 rcu_read_unlock_bh();
1da177e4
LT		 1642 in6_dev_put(idev);
1643}
1644
1645static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
1646 int ret = 0;
1647
1648 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1649 ret = __ipv6_regen_rndid(idev);
1650 return ret;
1651}
1652#endif
1653
1654/*
1655 * Add prefix route.
1656 */
1657
1658static void
1659addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
e431b8c0 1660 unsigned long expires, u32 flags)
1da177e4 1661{
86872cb5
TG		 1662 struct fib6_config cfg = {
1663 .fc_table = RT6_TABLE_PREFIX,
1664 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1665 .fc_ifindex = dev->ifindex,
1666 .fc_expires = expires,
1667 .fc_dst_len = plen,
1668 .fc_flags = RTF_UP | flags,
c346dca1 1669 .fc_nlinfo.nl_net = dev_net(dev),
f410a1fb 1670 .fc_protocol = RTPROT_KERNEL,
86872cb5 1671 };
1da177e4 1672
86872cb5 1673 ipv6_addr_copy(&cfg.fc_dst, pfx);
1da177e4
LT		 1674
1675 /* Prevent useless cloning on PtP SIT.
1676 This thing is done here expecting that the whole
1677 class of non-broadcast devices need not cloning.
1678 */
0be669bb 1679#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
86872cb5
TG		 1680 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1681 cfg.fc_flags |= RTF_NONEXTHOP;
0be669bb 1682#endif
1da177e4 1683
86872cb5 1684 ip6_route_add(&cfg);
1da177e4
LT		 1685}
1686
1687/* Create "default" multicast route to the interface */
1688
1689static void addrconf_add_mroute(struct net_device *dev)
1690{
86872cb5
TG		 1691 struct fib6_config cfg = {
1692 .fc_table = RT6_TABLE_LOCAL,
1693 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1694 .fc_ifindex = dev->ifindex,
1695 .fc_dst_len = 8,
1696 .fc_flags = RTF_UP,
c346dca1 1697 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5
TG		 1698 };
1699
1700 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1701
1702 ip6_route_add(&cfg);
1da177e4
LT		 1703}
1704
0be669bb 1705#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 1706static void sit_route_add(struct net_device *dev)
1707{
86872cb5
TG		 1708 struct fib6_config cfg = {
1709 .fc_table = RT6_TABLE_MAIN,
1710 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1711 .fc_ifindex = dev->ifindex,
1712 .fc_dst_len = 96,
1713 .fc_flags = RTF_UP | RTF_NONEXTHOP,
c346dca1 1714 .fc_nlinfo.nl_net = dev_net(dev),
86872cb5 1715 };
1da177e4
LT		 1716
1717 /* prefix length - 96 bits "::d.d.d.d" */
86872cb5 1718 ip6_route_add(&cfg);
1da177e4 1719}
0be669bb 1720#endif
1da177e4
LT		 1721
1722static void addrconf_add_lroute(struct net_device *dev)
1723{
1724 struct in6_addr addr;
1725
1726 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
1727 addrconf_prefix_route(&addr, 64, dev, 0, 0);
1728}
1729
1730static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1731{
1732 struct inet6_dev *idev;
1733
1734 ASSERT_RTNL();
1735
e21e8467
SH		 1736 idev = ipv6_find_idev(dev);
1737 if (!idev)
1da177e4
LT		 1738 return NULL;
1739
1740 /* Add default multicast route */
1741 addrconf_add_mroute(dev);
1742
1743 /* Add link local route */
1744 addrconf_add_lroute(dev);
1745 return idev;
1746}
1747
1748void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1749{
1750 struct prefix_info *pinfo;
1751 __u32 valid_lft;
1752 __u32 prefered_lft;
1753 int addr_type;
1da177e4 1754 struct inet6_dev *in6_dev;
56d417b1 1755 struct net *net = dev_net(dev);
1da177e4
LT		 1756
1757 pinfo = (struct prefix_info *) opt;
1ab1457c 1758
1da177e4
LT		 1759 if (len < sizeof(struct prefix_info)) {
1760 ADBG(("addrconf: prefix option too short\n"));
1761 return;
1762 }
1ab1457c 1763
1da177e4
LT		 1764 /*
1765 * Validation checks ([ADDRCONF], page 19)
1766 */
1767
1768 addr_type = ipv6_addr_type(&pinfo->prefix);
1769
1770 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
1771 return;
1772
1773 valid_lft = ntohl(pinfo->valid);
1774 prefered_lft = ntohl(pinfo->prefered);
1775
1776 if (prefered_lft > valid_lft) {
1777 if (net_ratelimit())
1778 printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
1779 return;
1780 }
1781
1782 in6_dev = in6_dev_get(dev);
1783
1784 if (in6_dev == NULL) {
1785 if (net_ratelimit())
1786 printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
1787 return;
1788 }
1789
1790 /*
1791 * Two things going on here:
1792 * 1) Add routes for on-link prefixes
1793 * 2) Configure prefixes with the auto flag set
1794 */
1795
4bed72e4
YH		 1796 if (pinfo->onlink) {
1797 struct rt6_info *rt;
1798 unsigned long rt_expires;
1799
6f704992
YH		 1800 /* Avoid arithmetic overflow. Really, we could
1801 * save rt_expires in seconds, likely valid_lft,
1802 * but it would require division in fib gc, that it
1803 * not good.
1804 */
4bed72e4
YH		 1805 if (HZ > USER_HZ)
1806 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
1807 else
1808 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
3dd4bc68 1809
4bed72e4
YH		 1810 if (addrconf_finite_timeout(rt_expires))
1811 rt_expires *= HZ;
1da177e4 1812
56d417b1 1813 rt = rt6_lookup(net, &pinfo->prefix, NULL,
6fda7350 1814 dev->ifindex, 1);
1da177e4 1815
2b5ead46 1816 if (rt && addrconf_is_prefix_route(rt)) {
6f704992
YH		 1817 /* Autoconf prefix route */
1818 if (valid_lft == 0) {
1819 ip6_del_rt(rt);
1820 rt = NULL;
4bed72e4 1821 } else if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1822 /* not infinity */
1823 rt->rt6i_expires = jiffies + rt_expires;
1824 rt->rt6i_flags |= RTF_EXPIRES;
1825 } else {
1826 rt->rt6i_flags &= ~RTF_EXPIRES;
1827 rt->rt6i_expires = 0;
1da177e4
LT		 1828 }
1829 } else if (valid_lft) {
6f704992 1830 clock_t expires = 0;
4bed72e4
YH		 1831 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
1832 if (addrconf_finite_timeout(rt_expires)) {
6f704992
YH		 1833 /* not infinity */
1834 flags |= RTF_EXPIRES;
1835 expires = jiffies_to_clock_t(rt_expires);
1836 }
1da177e4 1837 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
6f704992 1838 dev, expires, flags);
1da177e4
LT		 1839 }
1840 if (rt)
1841 dst_release(&rt->u.dst);
1842 }
1843
1844 /* Try to figure out our local address for this prefix */
1845
1846 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
1847 struct inet6_ifaddr * ifp;
1848 struct in6_addr addr;
1849 int create = 0, update_lft = 0;
1850
1851 if (pinfo->prefix_len == 64) {
1852 memcpy(&addr, &pinfo->prefix, 8);
1853 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
1854 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
1855 in6_dev_put(in6_dev);
1856 return;
1857 }
1858 goto ok;
1859 }
1860 if (net_ratelimit())
1861 printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
1862 pinfo->prefix_len);
1863 in6_dev_put(in6_dev);
1864 return;
1865
1866ok:
1867
53b7997f 1868 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
1da177e4
LT		 1869
1870 if (ifp == NULL && valid_lft) {
1871 int max_addresses = in6_dev->cnf.max_addresses;
95c385b4
NH		 1872 u32 addr_flags = 0;
1873
1874#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1875 if (in6_dev->cnf.optimistic_dad &&
53b7997f 1876 !net->ipv6.devconf_all->forwarding)
95c385b4
NH		 1877 addr_flags = IFA_F_OPTIMISTIC;
1878#endif
1da177e4
LT		 1879
1880 /* Do not allow to create too much of autoconfigured
1881 * addresses; this would be too easy way to crash kernel.
1882 */
1883 if (!max_addresses ||
1884 ipv6_count_addresses(in6_dev) < max_addresses)
1885 ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
95c385b4
NH		 1886 addr_type&IPV6_ADDR_SCOPE_MASK,
1887 addr_flags);
1da177e4
LT		 1888
1889 if (!ifp || IS_ERR(ifp)) {
1890 in6_dev_put(in6_dev);
1891 return;
1892 }
1893
1894 update_lft = create = 1;
1895 ifp->cstamp = jiffies;
1896 addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
1897 }
1898
1899 if (ifp) {
1900 int flags;
1901 unsigned long now;
1902#ifdef CONFIG_IPV6_PRIVACY
1903 struct inet6_ifaddr *ift;
1904#endif
1905 u32 stored_lft;
1906
1907 /* update lifetime (RFC2462 5.5.3 e) */
1908 spin_lock(&ifp->lock);
1909 now = jiffies;
1910 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
1911 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
1912 else
1913 stored_lft = 0;
1914 if (!update_lft && stored_lft) {
1915 if (valid_lft > MIN_VALID_LIFETIME ||
1916 valid_lft > stored_lft)
1917 update_lft = 1;
1918 else if (stored_lft <= MIN_VALID_LIFETIME) {
1919 /* valid_lft <= stored_lft is always true */
a1ed0526
BH		 1920 /*
1921 * RFC 4862 Section 5.5.3e:
1922 * "Note that the preferred lifetime of
1923 * the corresponding address is always
1924 * reset to the Preferred Lifetime in
1925 * the received Prefix Information
1926 * option, regardless of whether the
1927 * valid lifetime is also reset or
1928 * ignored."
1929 *
1930 * So if the preferred lifetime in
1931 * this advertisement is different
1932 * than what we have stored, but the
1933 * valid lifetime is invalid, just
1934 * reset prefered_lft.
1935 *
1936 * We must set the valid lifetime
1937 * to the stored lifetime since we'll
1938 * be updating the timestamp below,
1939 * else we'll set it back to the
1940 * minumum.
1941 */
1942 if (prefered_lft != ifp->prefered_lft) {
1943 valid_lft = stored_lft;
1944 update_lft = 1;
1945 }
1da177e4
LT		 1946 } else {
1947 valid_lft = MIN_VALID_LIFETIME;
1948 if (valid_lft < prefered_lft)
1949 prefered_lft = valid_lft;
1950 update_lft = 1;
1951 }
1952 }
1953
1954 if (update_lft) {
1955 ifp->valid_lft = valid_lft;
1956 ifp->prefered_lft = prefered_lft;
1957 ifp->tstamp = now;
1958 flags = ifp->flags;
1959 ifp->flags &= ~IFA_F_DEPRECATED;
1960 spin_unlock(&ifp->lock);
1961
1962 if (!(flags&IFA_F_TENTATIVE))
1963 ipv6_ifa_notify(0, ifp);
1964 } else
1965 spin_unlock(&ifp->lock);
1966
1967#ifdef CONFIG_IPV6_PRIVACY
1968 read_lock_bh(&in6_dev->lock);
1969 /* update all temporary addresses in the list */
372e6c8f 1970 list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) {
1da177e4
LT		 1971 /*
1972 * When adjusting the lifetimes of an existing
1973 * temporary address, only lower the lifetimes.
1974 * Implementations must not increase the
1975 * lifetimes of an existing temporary address
1976 * when processing a Prefix Information Option.
1977 */
c6fbfac2
BB		 1978 if (ifp != ift->ifpub)
1979 continue;
1980
1da177e4
LT		 1981 spin_lock(&ift->lock);
1982 flags = ift->flags;
1983 if (ift->valid_lft > valid_lft &&
1984 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
1985 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
1986 if (ift->prefered_lft > prefered_lft &&
1987 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
1988 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
1989 spin_unlock(&ift->lock);
1990 if (!(flags&IFA_F_TENTATIVE))
1991 ipv6_ifa_notify(0, ift);
1992 }
1993
1994 if (create && in6_dev->cnf.use_tempaddr > 0) {
1995 /*
1996 * When a new public address is created as described in [ADDRCONF],
1997 * also create a new temporary address.
1998 */
1ab1457c 1999 read_unlock_bh(&in6_dev->lock);
1da177e4
LT		 2000 ipv6_create_tempaddr(ifp, NULL);
2001 } else {
2002 read_unlock_bh(&in6_dev->lock);
2003 }
2004#endif
2005 in6_ifa_put(ifp);
2006 addrconf_verify(0);
2007 }
2008 }
2009 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2010 in6_dev_put(in6_dev);
2011}
2012
2013/*
2014 * Set destination address.
2015 * Special case for SIT interfaces where we create a new "virtual"
2016 * device.
2017 */
af284937 2018int addrconf_set_dstaddr(struct net *net, void __user *arg)
1da177e4
LT		 2019{
2020 struct in6_ifreq ireq;
2021 struct net_device *dev;
2022 int err = -EINVAL;
2023
2024 rtnl_lock();
2025
2026 err = -EFAULT;
2027 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2028 goto err_exit;
2029
af284937 2030 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
1da177e4
LT		 2031
2032 err = -ENODEV;
2033 if (dev == NULL)
2034 goto err_exit;
2035
0be669bb 2036#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4 2037 if (dev->type == ARPHRD_SIT) {
5bc3eb7e 2038 const struct net_device_ops *ops = dev->netdev_ops;
1da177e4 2039 struct ifreq ifr;
1da177e4
LT		 2040 struct ip_tunnel_parm p;
2041
2042 err = -EADDRNOTAVAIL;
2043 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2044 goto err_exit;
2045
2046 memset(&p, 0, sizeof(p));
2047 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2048 p.iph.saddr = 0;
2049 p.iph.version = 4;
2050 p.iph.ihl = 5;
2051 p.iph.protocol = IPPROTO_IPV6;
2052 p.iph.ttl = 64;
d20b3109 2053 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
1da177e4 2054
5bc3eb7e
SH		 2055 if (ops->ndo_do_ioctl) {
2056 mm_segment_t oldfs = get_fs();
2057
2058 set_fs(KERNEL_DS);
2059 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2060 set_fs(oldfs);
2061 } else
2062 err = -EOPNOTSUPP;
1da177e4
LT		 2063
2064 if (err == 0) {
2065 err = -ENOBUFS;
af284937
DL		 2066 dev = __dev_get_by_name(net, p.name);
2067 if (!dev)
1da177e4
LT		 2068 goto err_exit;
2069 err = dev_open(dev);
2070 }
2071 }
0be669bb 2072#endif
1da177e4
LT		 2073
2074err_exit:
2075 rtnl_unlock();
2076 return err;
2077}
2078
2079/*
2080 * Manual configuration of address on an interface
2081 */
af284937 2082static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2083 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
af284937 2084 __u32 valid_lft)
1da177e4
LT		 2085{
2086 struct inet6_ifaddr *ifp;
2087 struct inet6_dev *idev;
2088 struct net_device *dev;
2089 int scope;
6f704992
YH		 2090 u32 flags;
2091 clock_t expires;
4bed72e4 2092 unsigned long timeout;
1da177e4
LT		 2093
2094 ASSERT_RTNL();
1ab1457c 2095
24ef0da7
TG		 2096 if (plen > 128)
2097 return -EINVAL;
2098
0778769d
NT		 2099 /* check the lifetime */
2100 if (!valid_lft || prefered_lft > valid_lft)
2101 return -EINVAL;
2102
af284937
DL		 2103 dev = __dev_get_by_index(net, ifindex);
2104 if (!dev)
1da177e4 2105 return -ENODEV;
1ab1457c 2106
1da177e4
LT		 2107 if ((idev = addrconf_add_dev(dev)) == NULL)
2108 return -ENOBUFS;
2109
2110 scope = ipv6_addr_scope(pfx);
2111
4bed72e4
YH		 2112 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2113 if (addrconf_finite_timeout(timeout)) {
2114 expires = jiffies_to_clock_t(timeout * HZ);
2115 valid_lft = timeout;
6f704992 2116 flags = RTF_EXPIRES;
4bed72e4
YH		 2117 } else {
2118 expires = 0;
2119 flags = 0;
2120 ifa_flags |= IFA_F_PERMANENT;
6f704992 2121 }
0778769d 2122
4bed72e4
YH		 2123 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2124 if (addrconf_finite_timeout(timeout)) {
2125 if (timeout == 0)
2126 ifa_flags |= IFA_F_DEPRECATED;
2127 prefered_lft = timeout;
2128 }
0778769d
NT		 2129
2130 ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
2131
1da177e4 2132 if (!IS_ERR(ifp)) {
06aebfb7 2133 spin_lock_bh(&ifp->lock);
0778769d
NT		 2134 ifp->valid_lft = valid_lft;
2135 ifp->prefered_lft = prefered_lft;
2136 ifp->tstamp = jiffies;
06aebfb7 2137 spin_unlock_bh(&ifp->lock);
0778769d 2138
46d48046 2139 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
6f704992 2140 expires, flags);
95c385b4
NH		 2141 /*
2142 * Note that section 3.1 of RFC 4429 indicates
2143 * that the Optimistic flag should not be set for
2144 * manually configured addresses
2145 */
1da177e4
LT		 2146 addrconf_dad_start(ifp, 0);
2147 in6_ifa_put(ifp);
0778769d 2148 addrconf_verify(0);
1da177e4
LT		 2149 return 0;
2150 }
2151
2152 return PTR_ERR(ifp);
2153}
2154
af284937 2155static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
24ef0da7 2156 unsigned int plen)
1da177e4
LT		 2157{
2158 struct inet6_ifaddr *ifp;
2159 struct inet6_dev *idev;
2160 struct net_device *dev;
1ab1457c 2161
24ef0da7
TG		 2162 if (plen > 128)
2163 return -EINVAL;
2164
af284937
DL		 2165 dev = __dev_get_by_index(net, ifindex);
2166 if (!dev)
1da177e4
LT		 2167 return -ENODEV;
2168
2169 if ((idev = __in6_dev_get(dev)) == NULL)
2170 return -ENXIO;
2171
2172 read_lock_bh(&idev->lock);
502a2ffd 2173 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1da177e4
LT		 2174 if (ifp->prefix_len == plen &&
2175 ipv6_addr_equal(pfx, &ifp->addr)) {
2176 in6_ifa_hold(ifp);
2177 read_unlock_bh(&idev->lock);
1ab1457c 2178
1da177e4
LT		 2179 ipv6_del_addr(ifp);
2180
2181 /* If the last address is deleted administratively,
2182 disable IPv6 on this interface.
2183 */
502a2ffd 2184 if (list_empty(&idev->addr_list))
1da177e4
LT		 2185 addrconf_ifdown(idev->dev, 1);
2186 return 0;
2187 }
2188 }
2189 read_unlock_bh(&idev->lock);
2190 return -EADDRNOTAVAIL;
2191}
2192
2193
af284937 2194int addrconf_add_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2195{
2196 struct in6_ifreq ireq;
2197 int err;
1ab1457c 2198
1da177e4
LT		 2199 if (!capable(CAP_NET_ADMIN))
2200 return -EPERM;
1ab1457c 2201
1da177e4
LT		 2202 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2203 return -EFAULT;
2204
2205 rtnl_lock();
af284937
DL		 2206 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2207 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2208 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
1da177e4
LT		 2209 rtnl_unlock();
2210 return err;
2211}
2212
af284937 2213int addrconf_del_ifaddr(struct net *net, void __user *arg)
1da177e4
LT		 2214{
2215 struct in6_ifreq ireq;
2216 int err;
1ab1457c 2217
1da177e4
LT		 2218 if (!capable(CAP_NET_ADMIN))
2219 return -EPERM;
2220
2221 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2222 return -EFAULT;
2223
2224 rtnl_lock();
af284937
DL		 2225 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2226 ireq.ifr6_prefixlen);
1da177e4
LT		 2227 rtnl_unlock();
2228 return err;
2229}
2230
b5f348e5
IJ		 2231static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2232 int plen, int scope)
2233{
2234 struct inet6_ifaddr *ifp;
2235
2236 ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
2237 if (!IS_ERR(ifp)) {
2238 spin_lock_bh(&ifp->lock);
2239 ifp->flags &= ~IFA_F_TENTATIVE;
2240 spin_unlock_bh(&ifp->lock);
2241 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2242 in6_ifa_put(ifp);
2243 }
2244}
2245
0be669bb 2246#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2247static void sit_add_v4_addrs(struct inet6_dev *idev)
2248{
1da177e4
LT		 2249 struct in6_addr addr;
2250 struct net_device *dev;
c346dca1 2251 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2252 int scope;
2253
2254 ASSERT_RTNL();
2255
2256 memset(&addr, 0, sizeof(struct in6_addr));
2257 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2258
2259 if (idev->dev->flags&IFF_POINTOPOINT) {
2260 addr.s6_addr32[0] = htonl(0xfe800000);
2261 scope = IFA_LINK;
2262 } else {
2263 scope = IPV6_ADDR_COMPATv4;
2264 }
2265
2266 if (addr.s6_addr32[3]) {
b5f348e5 2267 add_addr(idev, &addr, 128, scope);
1da177e4
LT		 2268 return;
2269 }
2270
6fda7350 2271 for_each_netdev(net, dev) {
e5ed6399 2272 struct in_device * in_dev = __in_dev_get_rtnl(dev);
1da177e4
LT		 2273 if (in_dev && (dev->flags & IFF_UP)) {
2274 struct in_ifaddr * ifa;
2275
2276 int flag = scope;
2277
2278 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2279 int plen;
2280
2281 addr.s6_addr32[3] = ifa->ifa_local;
2282
2283 if (ifa->ifa_scope == RT_SCOPE_LINK)
2284 continue;
2285 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2286 if (idev->dev->flags&IFF_POINTOPOINT)
2287 continue;
2288 flag |= IFA_HOST;
2289 }
2290 if (idev->dev->flags&IFF_POINTOPOINT)
2291 plen = 64;
2292 else
2293 plen = 96;
2294
b5f348e5 2295 add_addr(idev, &addr, plen, flag);
1da177e4
LT		 2296 }
2297 }
1ab1457c 2298 }
1da177e4 2299}
0be669bb 2300#endif
1da177e4
LT		 2301
2302static void init_loopback(struct net_device *dev)
2303{
2304 struct inet6_dev *idev;
1da177e4
LT		 2305
2306 /* ::1 */
2307
2308 ASSERT_RTNL();
2309
2310 if ((idev = ipv6_find_idev(dev)) == NULL) {
2311 printk(KERN_DEBUG "init loopback: add_dev failed\n");
2312 return;
2313 }
2314
b5f348e5 2315 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
1da177e4
LT		 2316}
2317
2318static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
2319{
2320 struct inet6_ifaddr * ifp;
95c385b4
NH		 2321 u32 addr_flags = IFA_F_PERMANENT;
2322
2323#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2324 if (idev->cnf.optimistic_dad &&
702beb87 2325 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
95c385b4
NH		 2326 addr_flags |= IFA_F_OPTIMISTIC;
2327#endif
1da177e4 2328
95c385b4
NH		 2329
2330 ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
1da177e4 2331 if (!IS_ERR(ifp)) {
46d48046 2332 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
1da177e4
LT		 2333 addrconf_dad_start(ifp, 0);
2334 in6_ifa_put(ifp);
2335 }
2336}
2337
2338static void addrconf_dev_config(struct net_device *dev)
2339{
2340 struct in6_addr addr;
2341 struct inet6_dev * idev;
2342
2343 ASSERT_RTNL();
2344
74235a25
HX		 2345 if ((dev->type != ARPHRD_ETHER) &&
2346 (dev->type != ARPHRD_FDDI) &&
2347 (dev->type != ARPHRD_IEEE802_TR) &&
2348 (dev->type != ARPHRD_ARCNET) &&
2349 (dev->type != ARPHRD_INFINIBAND)) {
2350 /* Alas, we support only Ethernet autoconfiguration. */
2351 return;
2352 }
2353
1da177e4
LT		 2354 idev = addrconf_add_dev(dev);
2355 if (idev == NULL)
2356 return;
2357
2358 memset(&addr, 0, sizeof(struct in6_addr));
2359 addr.s6_addr32[0] = htonl(0xFE800000);
2360
2361 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2362 addrconf_add_linklocal(idev, &addr);
2363}
2364
0be669bb 2365#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2366static void addrconf_sit_config(struct net_device *dev)
2367{
2368 struct inet6_dev *idev;
2369
2370 ASSERT_RTNL();
2371
1ab1457c
YH		 2372 /*
2373 * Configure the tunnel with one of our IPv4
2374 * addresses... we should configure all of
1da177e4
LT		 2375 * our v4 addrs in the tunnel
2376 */
2377
2378 if ((idev = ipv6_find_idev(dev)) == NULL) {
2379 printk(KERN_DEBUG "init sit: add_dev failed\n");
2380 return;
2381 }
2382
c7dc89c0
FT		 2383 if (dev->priv_flags & IFF_ISATAP) {
2384 struct in6_addr addr;
2385
2386 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2387 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2388 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2389 addrconf_add_linklocal(idev, &addr);
2390 return;
2391 }
2392
1da177e4
LT		 2393 sit_add_v4_addrs(idev);
2394
2395 if (dev->flags&IFF_POINTOPOINT) {
2396 addrconf_add_mroute(dev);
2397 addrconf_add_lroute(dev);
2398 } else
2399 sit_route_add(dev);
2400}
0be669bb 2401#endif
1da177e4
LT		 2402
2403static inline int
2404ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2405{
2406 struct in6_addr lladdr;
2407
95c385b4 2408 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
1da177e4
LT		 2409 addrconf_add_linklocal(idev, &lladdr);
2410 return 0;
2411 }
2412 return -1;
2413}
2414
2415static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
2416{
2417 struct net_device *link_dev;
c346dca1 2418 struct net *net = dev_net(idev->dev);
1da177e4
LT		 2419
2420 /* first try to inherit the link-local address from the link device */
2421 if (idev->dev->iflink &&
6fda7350 2422 (link_dev = __dev_get_by_index(net, idev->dev->iflink))) {
1da177e4
LT		 2423 if (!ipv6_inherit_linklocal(idev, link_dev))
2424 return;
2425 }
2426 /* then try to inherit it from any device */
6fda7350 2427 for_each_netdev(net, link_dev) {
1da177e4
LT		 2428 if (!ipv6_inherit_linklocal(idev, link_dev))
2429 return;
2430 }
2431 printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
2432}
2433
2434/*
2435 * Autoconfigure tunnel with a link-local address so routing protocols,
2436 * DHCPv6, MLD etc. can be run over the virtual link
2437 */
2438
2439static void addrconf_ip6_tnl_config(struct net_device *dev)
2440{
2441 struct inet6_dev *idev;
2442
2443 ASSERT_RTNL();
2444
e21e8467
SH		 2445 idev = addrconf_add_dev(dev);
2446 if (!idev) {
1da177e4
LT		 2447 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
2448 return;
2449 }
2450 ip6_tnl_add_linklocal(idev);
1da177e4
LT		 2451}
2452
1ab1457c 2453static int addrconf_notify(struct notifier_block *this, unsigned long event,
1da177e4
LT		 2454 void * data)
2455{
2456 struct net_device *dev = (struct net_device *) data;
74235a25 2457 struct inet6_dev *idev = __in6_dev_get(dev);
c5e33bdd 2458 int run_pending = 0;
b217d616 2459 int err;
1da177e4 2460
e21e8467 2461 switch (event) {
45ba9dd2 2462 case NETDEV_REGISTER:
74235a25 2463 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
45ba9dd2
YH		 2464 idev = ipv6_add_dev(dev);
2465 if (!idev)
b217d616 2466 return notifier_from_errno(-ENOMEM);
45ba9dd2
YH		 2467 }
2468 break;
bcdd553f 2469
1da177e4 2470 case NETDEV_UP:
3c21edbd 2471 case NETDEV_CHANGE:
c2edacf8
JV		 2472 if (dev->flags & IFF_SLAVE)
2473 break;
2474
3c21edbd 2475 if (event == NETDEV_UP) {
f24e3d65 2476 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2477 /* device is not ready yet. */
2478 printk(KERN_INFO
2479 "ADDRCONF(NETDEV_UP): %s: "
2480 "link is not ready\n",
2481 dev->name);
2482 break;
2483 }
99081049 2484
d31c7b8f
EP		 2485 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2486 idev = ipv6_add_dev(dev);
2487
e3ec6cfc 2488 if (idev) {
99081049 2489 idev->if_flags |= IF_READY;
e3ec6cfc
BT		 2490 run_pending = 1;
2491 }
3c21edbd 2492 } else {
f24e3d65 2493 if (!addrconf_qdisc_ok(dev)) {
3c21edbd
YH		 2494 /* device is still not ready. */
2495 break;
2496 }
2497
2498 if (idev) {
bcdd553f 2499 if (idev->if_flags & IF_READY)
3c21edbd
YH		 2500 /* device is already configured. */
2501 break;
3c21edbd
YH		 2502 idev->if_flags |= IF_READY;
2503 }
2504
2505 printk(KERN_INFO
2506 "ADDRCONF(NETDEV_CHANGE): %s: "
2507 "link becomes ready\n",
2508 dev->name);
2509
c5e33bdd 2510 run_pending = 1;
3c21edbd
YH		 2511 }
2512
e21e8467 2513 switch (dev->type) {
0be669bb 2514#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1da177e4
LT		 2515 case ARPHRD_SIT:
2516 addrconf_sit_config(dev);
2517 break;
0be669bb 2518#endif
1da177e4
LT		 2519 case ARPHRD_TUNNEL6:
2520 addrconf_ip6_tnl_config(dev);
2521 break;
2522 case ARPHRD_LOOPBACK:
2523 init_loopback(dev);
2524 break;
2525
2526 default:
2527 addrconf_dev_config(dev);
2528 break;
3ff50b79 2529 }
bcdd553f 2530
1da177e4 2531 if (idev) {
c5e33bdd
YH		 2532 if (run_pending)
2533 addrconf_dad_run(idev);
2534
bcdd553f
SH		 2535 /*
2536 * If the MTU changed during the interface down,
2537 * when the interface up, the changed MTU must be
2538 * reflected in the idev as well as routers.
1da177e4 2539 */
bcdd553f
SH		 2540 if (idev->cnf.mtu6 != dev->mtu &&
2541 dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2542 rt6_mtu_change(dev, dev->mtu);
2543 idev->cnf.mtu6 = dev->mtu;
2544 }
2545 idev->tstamp = jiffies;
2546 inet6_ifinfo_notify(RTM_NEWLINK, idev);
bcdd553f
SH		 2547
2548 /*
2549 * If the changed mtu during down is lower than
2550 * IPV6_MIN_MTU stop IPv6 on this interface.
1da177e4
LT		 2551 */
2552 if (dev->mtu < IPV6_MIN_MTU)
bcdd553f 2553 addrconf_ifdown(dev, 1);
1da177e4
LT		 2554 }
2555 break;
2556
2557 case NETDEV_CHANGEMTU:
d31c7b8f 2558 if (idev && dev->mtu >= IPV6_MIN_MTU) {
1da177e4
LT		 2559 rt6_mtu_change(dev, dev->mtu);
2560 idev->cnf.mtu6 = dev->mtu;
2561 break;
2562 }
2563
d31c7b8f
EP		 2564 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2565 idev = ipv6_add_dev(dev);
2566 if (idev)
2567 break;
2568 }
2569
bcdd553f
SH		 2570 /*
2571 * MTU falled under IPV6_MIN_MTU.
2572 * Stop IPv6 on this interface.
2573 */
1da177e4
LT		 2574
2575 case NETDEV_DOWN:
2576 case NETDEV_UNREGISTER:
2577 /*
2578 * Remove all addresses from this interface.
2579 */
2580 addrconf_ifdown(dev, event != NETDEV_DOWN);
2581 break;
3c21edbd 2582
1da177e4 2583 case NETDEV_CHANGENAME:
1da177e4 2584 if (idev) {
5632c515 2585 snmp6_unregister_dev(idev);
408c4768 2586 addrconf_sysctl_unregister(idev);
f52295a9 2587 addrconf_sysctl_register(idev);
b217d616
HX		 2588 err = snmp6_register_dev(idev);
2589 if (err)
2590 return notifier_from_errno(err);
5632c515 2591 }
1da177e4 2592 break;
bcdd553f 2593
93d9b7d7
JP		 2594 case NETDEV_PRE_TYPE_CHANGE:
2595 case NETDEV_POST_TYPE_CHANGE:
2596 addrconf_type_change(dev, event);
75c78500 2597 break;
3ff50b79 2598 }
1da177e4
LT		 2599
2600 return NOTIFY_OK;
2601}
2602
2603/*
2604 * addrconf module should be notified of a device going up
2605 */
2606static struct notifier_block ipv6_dev_notf = {
2607 .notifier_call = addrconf_notify,
1da177e4
LT		 2608};
2609
93d9b7d7 2610static void addrconf_type_change(struct net_device *dev, unsigned long event)
75c78500
MS		 2611{
2612 struct inet6_dev *idev;
2613 ASSERT_RTNL();
2614
2615 idev = __in6_dev_get(dev);
2616
93d9b7d7 2617 if (event == NETDEV_POST_TYPE_CHANGE)
75c78500 2618 ipv6_mc_remap(idev);
93d9b7d7 2619 else if (event == NETDEV_PRE_TYPE_CHANGE)
75c78500
MS		 2620 ipv6_mc_unmap(idev);
2621}
2622
1da177e4
LT		 2623static int addrconf_ifdown(struct net_device *dev, int how)
2624{
c346dca1 2625 struct net *net = dev_net(dev);
502a2ffd 2626 struct inet6_dev *idev;
2627 struct inet6_ifaddr *ifa;
2628 LIST_HEAD(keep_list);
1da177e4
LT		 2629
2630 ASSERT_RTNL();
2631
f3db4851 2632 rt6_ifdown(net, dev);
1da177e4
LT		 2633 neigh_ifdown(&nd_tbl, dev);
2634
2635 idev = __in6_dev_get(dev);
2636 if (idev == NULL)
2637 return -ENODEV;
2638
bcdd553f
SH		 2639 /*
2640 * Step 1: remove reference to ipv6 device from parent device.
2641 * Do not dev_put!
1da177e4 2642 */
439e2385 2643 if (how) {
1da177e4 2644 idev->dead = 1;
8814c4b5
YH		 2645
2646 /* protected by rtnl_lock */
2647 rcu_assign_pointer(dev->ip6_ptr, NULL);
1da177e4
LT		 2648
2649 /* Step 1.5: remove snmp6 entry */
2650 snmp6_unregister_dev(idev);
2651
2652 }
2653
1da177e4
LT		 2654 write_lock_bh(&idev->lock);
2655
bcdd553f 2656 /* Step 2: clear flags for stateless addrconf */
439e2385 2657 if (!how)
3c21edbd 2658 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
1da177e4 2659
1da177e4 2660#ifdef CONFIG_IPV6_PRIVACY
439e2385 2661 if (how && del_timer(&idev->regen_timer))
1da177e4
LT		 2662 in6_dev_put(idev);
2663
bcdd553f 2664 /* Step 3: clear tempaddr list */
372e6c8f 2665 while (!list_empty(&idev->tempaddr_list)) {
2666 ifa = list_first_entry(&idev->tempaddr_list,
2667 struct inet6_ifaddr, tmp_list);
2668 list_del(&ifa->tmp_list);
e9d3e084 2669 ifa->state = INET6_IFADDR_STATE_DEAD;
1da177e4
LT		 2670 write_unlock_bh(&idev->lock);
2671 spin_lock_bh(&ifa->lock);
2672
2673 if (ifa->ifpub) {
2674 in6_ifa_put(ifa->ifpub);
2675 ifa->ifpub = NULL;
2676 }
2677 spin_unlock_bh(&ifa->lock);
2678 in6_ifa_put(ifa);
2679 write_lock_bh(&idev->lock);
2680 }
2681#endif
8f37ada5 2682
502a2ffd 2683 while (!list_empty(&idev->addr_list)) {
2684 ifa = list_first_entry(&idev->addr_list,
2685 struct inet6_ifaddr, if_list);
84e8b803 2686 addrconf_del_timer(ifa);
2687
2688 /* If just doing link down, and address is permanent
2689 and not link-local, then retain it. */
bcdd553f 2690 if (!how &&
84e8b803 2691 (ifa->flags&IFA_F_PERMANENT) &&
2692 !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
502a2ffd 2693 list_move_tail(&ifa->if_list, &keep_list);
dc2b99f7 2694
84e8b803 2695 /* If not doing DAD on this address, just keep it. */
2696 if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) ||
2697 idev->cnf.accept_dad <= 0 ||
2698 (ifa->flags & IFA_F_NODAD))
2699 continue;
2700
2701 /* If it was tentative already, no need to notify */
2702 if (ifa->flags & IFA_F_TENTATIVE)
2703 continue;
2704
2705 /* Flag it for later restoration when link comes up */
2706 ifa->flags |= IFA_F_TENTATIVE;
2707 in6_ifa_hold(ifa);
27bdb2ab 2708 write_unlock_bh(&idev->lock);
dc2b99f7 2709 } else {
502a2ffd 2710 list_del(&ifa->if_list);
e9d3e084 2711 ifa->state = INET6_IFADDR_STATE_DEAD;
27bdb2ab 2712 write_unlock_bh(&idev->lock);
1da177e4 2713
27bdb2ab 2714 /* clear hash table */
2715 spin_lock_bh(&addrconf_hash_lock);
2716 hlist_del_init_rcu(&ifa->addr_lst);
27bdb2ab 2717 spin_unlock_bh(&addrconf_hash_lock);
2718 }
c2e21293 2719
84e8b803 2720 __ipv6_ifa_notify(RTM_DELADDR, ifa);
e9d3e084 2721 if (ifa->state == INET6_IFADDR_STATE_DEAD)
8595805a 2722 atomic_notifier_call_chain(&inet6addr_chain,
2723 NETDEV_DOWN, ifa);
84e8b803 2724 in6_ifa_put(ifa);
dc2b99f7 2725
84e8b803 2726 write_lock_bh(&idev->lock);
1da177e4 2727 }
8f37ada5 2728
502a2ffd 2729 list_splice(&keep_list, &idev->addr_list);
8f37ada5 2730
1da177e4
LT		 2731 write_unlock_bh(&idev->lock);
2732
2733 /* Step 5: Discard multicast list */
439e2385 2734 if (how)
1da177e4
LT		 2735 ipv6_mc_destroy_dev(idev);
2736 else
2737 ipv6_mc_down(idev);
2738
1da177e4 2739 idev->tstamp = jiffies;
1ab1457c 2740
bcdd553f 2741 /* Last: Shot the device (if unregistered) */
439e2385 2742 if (how) {
408c4768 2743 addrconf_sysctl_unregister(idev);
1da177e4
LT		 2744 neigh_parms_release(&nd_tbl, idev->nd_parms);
2745 neigh_ifdown(&nd_tbl, dev);
2746 in6_dev_put(idev);
2747 }
2748 return 0;
2749}
2750
2751static void addrconf_rs_timer(unsigned long data)
2752{
2753 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
5b2a1953 2754 struct inet6_dev *idev = ifp->idev;
1da177e4 2755
5b2a1953 2756 read_lock(&idev->lock);
2757 if (idev->dead || !(idev->if_flags & IF_READY))
1da177e4
LT		 2758 goto out;
2759
5b2a1953 2760 if (idev->cnf.forwarding)
2761 goto out;
2762
2763 /* Announcement received after solicitation was sent */
2764 if (idev->if_flags & IF_RA_RCVD)
1da177e4 2765 goto out;
1da177e4
LT		 2766
2767 spin_lock(&ifp->lock);
5b2a1953 2768 if (ifp->probes++ < idev->cnf.rtr_solicits) {
1da177e4
LT		 2769 /* The wait after the last probe can be shorter */
2770 addrconf_mod_timer(ifp, AC_RS,
5b2a1953 2771 (ifp->probes == idev->cnf.rtr_solicits) ?
2772 idev->cnf.rtr_solicit_delay :
2773 idev->cnf.rtr_solicit_interval);
1da177e4
LT		 2774 spin_unlock(&ifp->lock);
2775
5b2a1953 2776 ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2777 } else {
2778 spin_unlock(&ifp->lock);
2779 /*
2780 * Note: we do not support deprecated "all on-link"
2781 * assumption any longer.
2782 */
2783 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
5b2a1953 2784 idev->dev->name);
1da177e4
LT		 2785 }
2786
2787out:
5b2a1953 2788 read_unlock(&idev->lock);
1da177e4
LT		 2789 in6_ifa_put(ifp);
2790}
2791
2792/*
2793 * Duplicate Address Detection
2794 */
3c21edbd
YH		 2795static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
2796{
2797 unsigned long rand_num;
2798 struct inet6_dev *idev = ifp->idev;
2799
95c385b4
NH		 2800 if (ifp->flags & IFA_F_OPTIMISTIC)
2801 rand_num = 0;
2802 else
2803 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
2804
3c21edbd
YH		 2805 ifp->probes = idev->cnf.dad_transmits;
2806 addrconf_mod_timer(ifp, AC_DAD, rand_num);
2807}
2808
e431b8c0 2809static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
1da177e4
LT		 2810{
2811 struct inet6_dev *idev = ifp->idev;
2812 struct net_device *dev = idev->dev;
1da177e4
LT		 2813
2814 addrconf_join_solict(dev, &ifp->addr);
2815
1da177e4 2816 net_srandom(ifp->addr.s6_addr32[3]);
1da177e4
LT		 2817
2818 read_lock_bh(&idev->lock);
e9d3e084 2819 if (ifp->state == INET6_IFADDR_STATE_DEAD)
1da177e4 2820 goto out;
1da177e4 2821
21809faf 2822 spin_lock(&ifp->lock);
1da177e4 2823 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
1b34be74 2824 idev->cnf.accept_dad < 1 ||
55ebaef1
NT		 2825 !(ifp->flags&IFA_F_TENTATIVE) ||
2826 ifp->flags & IFA_F_NODAD) {
cc411d0b 2827 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2828 spin_unlock(&ifp->lock);
1da177e4
LT		 2829 read_unlock_bh(&idev->lock);
2830
2831 addrconf_dad_completed(ifp);
2832 return;
2833 }
2834
6732bade 2835 if (!(idev->if_flags & IF_READY)) {
21809faf 2836 spin_unlock(&ifp->lock);
6732bade 2837 read_unlock_bh(&idev->lock);
3c21edbd 2838 /*
590a9887 2839 * If the device is not ready:
3c21edbd
YH		 2840 * - keep it tentative if it is a permanent address.
2841 * - otherwise, kill it.
2842 */
2843 in6_ifa_hold(ifp);
cc411d0b 2844 addrconf_dad_stop(ifp, 0);
6732bade 2845 return;
3c21edbd 2846 }
95c385b4
NH		 2847
2848 /*
2849 * Optimistic nodes can start receiving
2850 * Frames right away
2851 */
e21e8467 2852 if (ifp->flags & IFA_F_OPTIMISTIC)
95c385b4
NH		 2853 ip6_ins_rt(ifp->rt);
2854
6732bade 2855 addrconf_dad_kick(ifp);
21809faf 2856 spin_unlock(&ifp->lock);
1da177e4
LT		 2857out:
2858 read_unlock_bh(&idev->lock);
2859}
2860
2861static void addrconf_dad_timer(unsigned long data)
2862{
2863 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
2864 struct inet6_dev *idev = ifp->idev;
1da177e4
LT		 2865 struct in6_addr mcaddr;
2866
122e4519 2867 read_lock(&idev->lock);
2868 if (idev->dead || !(idev->if_flags & IF_READY)) {
2869 read_unlock(&idev->lock);
1da177e4
LT		 2870 goto out;
2871 }
21809faf 2872
2873 spin_lock(&ifp->lock);
1da177e4
LT		 2874 if (ifp->probes == 0) {
2875 /*
2876 * DAD was successful
2877 */
2878
cc411d0b 2879 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
21809faf 2880 spin_unlock(&ifp->lock);
122e4519 2881 read_unlock(&idev->lock);
1da177e4
LT		 2882
2883 addrconf_dad_completed(ifp);
2884
2885 goto out;
2886 }
2887
2888 ifp->probes--;
2889 addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
21809faf 2890 spin_unlock(&ifp->lock);
122e4519 2891 read_unlock(&idev->lock);
1da177e4
LT		 2892
2893 /* send a neighbour solicitation for our addr */
1da177e4 2894 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
d7aabf22 2895 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
1da177e4
LT		 2896out:
2897 in6_ifa_put(ifp);
2898}
2899
2900static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
2901{
e21e8467 2902 struct net_device *dev = ifp->idev->dev;
1da177e4
LT		 2903
2904 /*
2905 * Configure the address for reception. Now it is valid.
2906 */
2907
2908 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2909
2910 /* If added prefix is link local and forwarding is off,
2911 start sending router solicitations.
2912 */
2913
2914 if (ifp->idev->cnf.forwarding == 0 &&
2915 ifp->idev->cnf.rtr_solicits > 0 &&
2916 (dev->flags&IFF_LOOPBACK) == 0 &&
2917 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
1da177e4
LT		 2918 /*
2919 * If a host as already performed a random delay
2920 * [...] as part of DAD [...] there is no need
2921 * to delay again before sending the first RS
2922 */
f3ee4010 2923 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
1da177e4
LT		 2924
2925 spin_lock_bh(&ifp->lock);
2926 ifp->probes = 1;
2927 ifp->idev->if_flags |= IF_RS_SENT;
2928 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2929 spin_unlock_bh(&ifp->lock);
2930 }
2931}
2932
e21e8467
SH		 2933static void addrconf_dad_run(struct inet6_dev *idev)
2934{
c5e33bdd
YH		 2935 struct inet6_ifaddr *ifp;
2936
2937 read_lock_bh(&idev->lock);
502a2ffd 2938 list_for_each_entry(ifp, &idev->addr_list, if_list) {
21809faf 2939 spin_lock(&ifp->lock);
c5e33bdd 2940 if (!(ifp->flags & IFA_F_TENTATIVE)) {
21809faf 2941 spin_unlock(&ifp->lock);
c5e33bdd
YH		 2942 continue;
2943 }
21809faf 2944 spin_unlock(&ifp->lock);
c5e33bdd
YH		 2945 addrconf_dad_kick(ifp);
2946 }
2947 read_unlock_bh(&idev->lock);
2948}
2949
1da177e4
LT		 2950#ifdef CONFIG_PROC_FS
2951struct if6_iter_state {
3c40090a 2952 struct seq_net_private p;
1da177e4
LT		 2953 int bucket;
2954};
2955
2956static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
2957{
2958 struct inet6_ifaddr *ifa = NULL;
2959 struct if6_iter_state *state = seq->private;
1218854a 2960 struct net *net = seq_file_net(seq);
1da177e4
LT		 2961
2962 for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
c2e21293 2963 struct hlist_node *n;
4f70ecca 2964 hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket],
5c578aed 2965 addr_lst)
c2e21293 2966 if (net_eq(dev_net(ifa->idev->dev), net))
2967 return ifa;
1da177e4 2968 }
c2e21293 2969 return NULL;
1da177e4
LT		 2970}
2971
c2e21293 2972static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
2973 struct inet6_ifaddr *ifa)
1da177e4
LT		 2974{
2975 struct if6_iter_state *state = seq->private;
1218854a 2976 struct net *net = seq_file_net(seq);
c2e21293 2977 struct hlist_node *n = &ifa->addr_lst;
1da177e4 2978
4f70ecca 2979 hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst)
c2e21293 2980 if (net_eq(dev_net(ifa->idev->dev), net))
2981 return ifa;
3c40090a 2982
c2e21293 2983 while (++state->bucket < IN6_ADDR_HSIZE) {
4f70ecca 2984 hlist_for_each_entry_rcu_bh(ifa, n,
c2e21293 2985 &inet6_addr_lst[state->bucket], addr_lst) {
2986 if (net_eq(dev_net(ifa->idev->dev), net))
2987 return ifa;
2988 }
1da177e4 2989 }
3c40090a 2990
c2e21293 2991 return NULL;
1da177e4
LT		 2992}
2993
2994static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
2995{
2996 struct inet6_ifaddr *ifa = if6_get_first(seq);
2997
2998 if (ifa)
e21e8467 2999 while (pos && (ifa = if6_get_next(seq, ifa)) != NULL)
1da177e4
LT		 3000 --pos;
3001 return pos ? NULL : ifa;
3002}
3003
3004static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
4f70ecca 3005 __acquires(rcu_bh)
1da177e4 3006{
5c578aed 3007 rcu_read_lock_bh();
1da177e4
LT		 3008 return if6_get_idx(seq, *pos);
3009}
3010
3011static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3012{
3013 struct inet6_ifaddr *ifa;
3014
3015 ifa = if6_get_next(seq, v);
3016 ++*pos;
3017 return ifa;
3018}
3019
3020static void if6_seq_stop(struct seq_file *seq, void *v)
4f70ecca 3021 __releases(rcu_bh)
1da177e4 3022{
5c578aed 3023 rcu_read_unlock_bh();
1da177e4
LT		 3024}
3025
3026static int if6_seq_show(struct seq_file *seq, void *v)
3027{
3028 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
4b7a4274 3029 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
b071195d 3030 &ifp->addr,
1da177e4
LT		 3031 ifp->idev->dev->ifindex,
3032 ifp->prefix_len,
3033 ifp->scope,
3034 ifp->flags,
3035 ifp->idev->dev->name);
3036 return 0;
3037}
3038
56b3d975 3039static const struct seq_operations if6_seq_ops = {
1da177e4
LT		 3040 .start = if6_seq_start,
3041 .next = if6_seq_next,
3042 .show = if6_seq_show,
3043 .stop = if6_seq_stop,
3044};
3045
3046static int if6_seq_open(struct inode *inode, struct file *file)
3047{
3c40090a
DL		 3048 return seq_open_net(inode, file, &if6_seq_ops,
3049 sizeof(struct if6_iter_state));
1da177e4
LT		 3050}
3051
9a32144e 3052static const struct file_operations if6_fops = {
1da177e4
LT		 3053 .owner = THIS_MODULE,
3054 .open = if6_seq_open,
3055 .read = seq_read,
3056 .llseek = seq_lseek,
3c40090a 3057 .release = seq_release_net,
1da177e4
LT		 3058};
3059
2c8c1e72 3060static int __net_init if6_proc_net_init(struct net *net)
1da177e4 3061{
3c40090a 3062 if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops))
1da177e4
LT		 3063 return -ENOMEM;
3064 return 0;
3065}
3066
2c8c1e72 3067static void __net_exit if6_proc_net_exit(struct net *net)
3c40090a
DL		 3068{
3069 proc_net_remove(net, "if_inet6");
3070}
3071
3072static struct pernet_operations if6_proc_net_ops = {
3073 .init = if6_proc_net_init,
3074 .exit = if6_proc_net_exit,
3075};
3076
3077int __init if6_proc_init(void)
3078{
3079 return register_pernet_subsys(&if6_proc_net_ops);
3080}
3081
1da177e4
LT		 3082void if6_proc_exit(void)
3083{
3c40090a 3084 unregister_pernet_subsys(&if6_proc_net_ops);
1da177e4
LT		 3085}
3086#endif /* CONFIG_PROC_FS */
3087
59fbb3a6 3088#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 3089/* Check if address is a home address configured on any interface. */
389f6612 3090int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
3b9f9a1c
NT		 3091{
3092 int ret = 0;
c2e21293 3093 struct inet6_ifaddr *ifp = NULL;
3094 struct hlist_node *n;
3a88a81d 3095 unsigned int hash = ipv6_addr_hash(addr);
c2e21293 3096
5c578aed 3097 rcu_read_lock_bh();
4f70ecca 3098 hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) {
878628fb 3099 if (!net_eq(dev_net(ifp->idev->dev), net))
389f6612 3100 continue;
caad295f 3101 if (ipv6_addr_equal(&ifp->addr, addr) &&
3b9f9a1c
NT		 3102 (ifp->flags & IFA_F_HOMEADDRESS)) {
3103 ret = 1;
3104 break;
3105 }
3106 }
5c578aed 3107 rcu_read_unlock_bh();
3b9f9a1c
NT		 3108 return ret;
3109}
3110#endif
3111
1da177e4
LT		 3112/*
3113 * Periodic address status verification
3114 */
3115
3116static void addrconf_verify(unsigned long foo)
3117{
b2db7564 3118 unsigned long now, next, next_sec, next_sched;
1da177e4 3119 struct inet6_ifaddr *ifp;
c2e21293 3120 struct hlist_node *node;
1da177e4
LT		 3121 int i;
3122
5c578aed 3123 rcu_read_lock_bh();
3124 spin_lock(&addrconf_verify_lock);
1da177e4 3125 now = jiffies;
b2db7564 3126 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
1da177e4
LT		 3127
3128 del_timer(&addr_chk_timer);
3129
bcdd553f 3130 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
1da177e4 3131restart:
4f70ecca 3132 hlist_for_each_entry_rcu_bh(ifp, node,
5c578aed 3133 &inet6_addr_lst[i], addr_lst) {
1da177e4 3134 unsigned long age;
1da177e4
LT		 3135
3136 if (ifp->flags & IFA_F_PERMANENT)
3137 continue;
3138
3139 spin_lock(&ifp->lock);
b2db7564
YH		 3140 /* We try to batch several events at once. */
3141 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
1da177e4 3142
8f27ebb9
YH		 3143 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3144 age >= ifp->valid_lft) {
1da177e4
LT		 3145 spin_unlock(&ifp->lock);
3146 in6_ifa_hold(ifp);
1da177e4
LT		 3147 ipv6_del_addr(ifp);
3148 goto restart;
8f27ebb9
YH		 3149 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3150 spin_unlock(&ifp->lock);
3151 continue;
1da177e4 3152 } else if (age >= ifp->prefered_lft) {
a1ed0526 3153 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
1da177e4
LT		 3154 int deprecate = 0;
3155
3156 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3157 deprecate = 1;
3158 ifp->flags |= IFA_F_DEPRECATED;
3159 }
3160
3161 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3162 next = ifp->tstamp + ifp->valid_lft * HZ;
3163
3164 spin_unlock(&ifp->lock);
3165
3166 if (deprecate) {
3167 in6_ifa_hold(ifp);
1da177e4
LT		 3168
3169 ipv6_ifa_notify(0, ifp);
3170 in6_ifa_put(ifp);
3171 goto restart;
3172 }
3173#ifdef CONFIG_IPV6_PRIVACY
3174 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3175 !(ifp->flags&IFA_F_TENTATIVE)) {
88949cf4 3176 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3177 ifp->idev->cnf.dad_transmits *
3178 ifp->idev->nd_parms->retrans_time / HZ;
3179
1da177e4
LT		 3180 if (age >= ifp->prefered_lft - regen_advance) {
3181 struct inet6_ifaddr *ifpub = ifp->ifpub;
3182 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3183 next = ifp->tstamp + ifp->prefered_lft * HZ;
3184 if (!ifp->regen_count && ifpub) {
3185 ifp->regen_count++;
3186 in6_ifa_hold(ifp);
3187 in6_ifa_hold(ifpub);
3188 spin_unlock(&ifp->lock);
5c578aed 3189
291d809b
HY		 3190 spin_lock(&ifpub->lock);
3191 ifpub->regen_count = 0;
3192 spin_unlock(&ifpub->lock);
1da177e4
LT		 3193 ipv6_create_tempaddr(ifpub, ifp);
3194 in6_ifa_put(ifpub);
3195 in6_ifa_put(ifp);
3196 goto restart;
3197 }
3198 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3199 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3200 spin_unlock(&ifp->lock);
3201#endif
3202 } else {
3203 /* ifp->prefered_lft <= ifp->valid_lft */
3204 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3205 next = ifp->tstamp + ifp->prefered_lft * HZ;
3206 spin_unlock(&ifp->lock);
3207 }
3208 }
1da177e4
LT		 3209 }
3210
b2db7564
YH		 3211 next_sec = round_jiffies_up(next);
3212 next_sched = next;
3213
3214 /* If rounded timeout is accurate enough, accept it. */
3215 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3216 next_sched = next_sec;
3217
3218 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3219 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3220 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3221
3222 ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3223 now, next, next_sec, next_sched));
3224
3225 addr_chk_timer.expires = next_sched;
1da177e4 3226 add_timer(&addr_chk_timer);
5c578aed 3227 spin_unlock(&addrconf_verify_lock);
3228 rcu_read_unlock_bh();
1da177e4
LT		 3229}
3230
461d8837
TG		 3231static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
3232{
3233 struct in6_addr *pfx = NULL;
3234
3235 if (addr)
3236 pfx = nla_data(addr);
3237
3238 if (local) {
3239 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3240 pfx = NULL;
3241 else
3242 pfx = nla_data(local);
3243 }
3244
3245 return pfx;
3246}
3247
ef7c79ed 3248static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
461d8837
TG		 3249 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3250 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3251 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3252};
3253
1da177e4
LT		 3254static int
3255inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3256{
3b1e0a65 3257 struct net *net = sock_net(skb->sk);
b933f716
TG		 3258 struct ifaddrmsg *ifm;
3259 struct nlattr *tb[IFA_MAX+1];
1da177e4 3260 struct in6_addr *pfx;
b933f716 3261 int err;
1da177e4 3262
b933f716
TG		 3263 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3264 if (err < 0)
3265 return err;
3266
3267 ifm = nlmsg_data(nlh);
3268 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3269 if (pfx == NULL)
3270 return -EINVAL;
3271
af284937 3272 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
1da177e4
LT		 3273}
3274
55ebaef1
NT		 3275static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3276 u32 prefered_lft, u32 valid_lft)
081bba5b 3277{
6f704992
YH		 3278 u32 flags;
3279 clock_t expires;
4bed72e4 3280 unsigned long timeout;
46d48046 3281
081bba5b
NT		 3282 if (!valid_lft || (prefered_lft > valid_lft))
3283 return -EINVAL;
3284
4bed72e4
YH		 3285 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3286 if (addrconf_finite_timeout(timeout)) {
3287 expires = jiffies_to_clock_t(timeout * HZ);
3288 valid_lft = timeout;
6f704992 3289 flags = RTF_EXPIRES;
4bed72e4
YH		 3290 } else {
3291 expires = 0;
3292 flags = 0;
3293 ifa_flags |= IFA_F_PERMANENT;
6f704992 3294 }
081bba5b 3295
4bed72e4
YH		 3296 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3297 if (addrconf_finite_timeout(timeout)) {
3298 if (timeout == 0)
3299 ifa_flags |= IFA_F_DEPRECATED;
3300 prefered_lft = timeout;
3301 }
081bba5b
NT		 3302
3303 spin_lock_bh(&ifp->lock);
3b9f9a1c 3304 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
081bba5b
NT		 3305 ifp->tstamp = jiffies;
3306 ifp->valid_lft = valid_lft;
3307 ifp->prefered_lft = prefered_lft;
3308
3309 spin_unlock_bh(&ifp->lock);
3310 if (!(ifp->flags&IFA_F_TENTATIVE))
3311 ipv6_ifa_notify(0, ifp);
081bba5b 3312
46d48046 3313 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
6f704992 3314 expires, flags);
081bba5b
NT		 3315 addrconf_verify(0);
3316
3317 return 0;
3318}
3319
1da177e4
LT		 3320static int
3321inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
3322{
3b1e0a65 3323 struct net *net = sock_net(skb->sk);
461d8837
TG		 3324 struct ifaddrmsg *ifm;
3325 struct nlattr *tb[IFA_MAX+1];
1da177e4 3326 struct in6_addr *pfx;
7198f8ce
TG		 3327 struct inet6_ifaddr *ifa;
3328 struct net_device *dev;
55ebaef1
NT		 3329 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3330 u8 ifa_flags;
461d8837 3331 int err;
1da177e4 3332
461d8837
TG		 3333 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3334 if (err < 0)
3335 return err;
3336
3337 ifm = nlmsg_data(nlh);
3338 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
1da177e4
LT		 3339 if (pfx == NULL)
3340 return -EINVAL;
3341
461d8837 3342 if (tb[IFA_CACHEINFO]) {
0778769d 3343 struct ifa_cacheinfo *ci;
461d8837
TG		 3344
3345 ci = nla_data(tb[IFA_CACHEINFO]);
0778769d 3346 valid_lft = ci->ifa_valid;
461d8837
TG		 3347 preferred_lft = ci->ifa_prefered;
3348 } else {
3349 preferred_lft = INFINITY_LIFE_TIME;
3350 valid_lft = INFINITY_LIFE_TIME;
0778769d
NT		 3351 }
3352
af284937 3353 dev = __dev_get_by_index(net, ifm->ifa_index);
7198f8ce
TG		 3354 if (dev == NULL)
3355 return -ENODEV;
3356
55ebaef1 3357 /* We ignore other flags so far. */
3b9f9a1c 3358 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
55ebaef1 3359
1cab3da6 3360 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
7198f8ce
TG		 3361 if (ifa == NULL) {
3362 /*
3363 * It would be best to check for !NLM_F_CREATE here but
3364 * userspace alreay relies on not having to provide this.
3365 */
af284937
DL		 3366 return inet6_addr_add(net, ifm->ifa_index, pfx,
3367 ifm->ifa_prefixlen, ifa_flags,
3368 preferred_lft, valid_lft);
081bba5b
NT		 3369 }
3370
7198f8ce
TG		 3371 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3372 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3373 err = -EEXIST;
3374 else
55ebaef1 3375 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
7198f8ce
TG		 3376
3377 in6_ifa_put(ifa);
3378
3379 return err;
1da177e4
LT		 3380}
3381
101bb229
TG		 3382static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3383 u8 scope, int ifindex)
3384{
3385 struct ifaddrmsg *ifm;
3386
3387 ifm = nlmsg_data(nlh);
3388 ifm->ifa_family = AF_INET6;
3389 ifm->ifa_prefixlen = prefixlen;
3390 ifm->ifa_flags = flags;
3391 ifm->ifa_scope = scope;
3392 ifm->ifa_index = ifindex;
3393}
3394
85486af0
TG		 3395static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3396 unsigned long tstamp, u32 preferred, u32 valid)
3397{
3398 struct ifa_cacheinfo ci;
3399
3400 ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
3401 + TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3402 ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
3403 + TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3404 ci.ifa_prefered = preferred;
3405 ci.ifa_valid = valid;
3406
3407 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3408}
3409
101bb229
TG		 3410static inline int rt_scope(int ifa_scope)
3411{
3412 if (ifa_scope & IFA_HOST)
3413 return RT_SCOPE_HOST;
3414 else if (ifa_scope & IFA_LINK)
3415 return RT_SCOPE_LINK;
3416 else if (ifa_scope & IFA_SITE)
3417 return RT_SCOPE_SITE;
3418 else
3419 return RT_SCOPE_UNIVERSE;
3420}
3421
0ab6803b
TG		 3422static inline int inet6_ifaddr_msgsize(void)
3423{
339bf98f
TG		 3424 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3425 + nla_total_size(16) /* IFA_ADDRESS */
3426 + nla_total_size(sizeof(struct ifa_cacheinfo));
0ab6803b 3427}
c5396a31 3428
1da177e4 3429static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
b6544c0b 3430 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3431{
1da177e4 3432 struct nlmsghdr *nlh;
85486af0 3433 u32 preferred, valid;
1da177e4 3434
0ab6803b
TG		 3435 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3436 if (nlh == NULL)
26932566 3437 return -EMSGSIZE;
0ab6803b 3438
101bb229
TG		 3439 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3440 ifa->idev->dev->ifindex);
3441
1da177e4 3442 if (!(ifa->flags&IFA_F_PERMANENT)) {
85486af0
TG		 3443 preferred = ifa->prefered_lft;
3444 valid = ifa->valid_lft;
3445 if (preferred != INFINITY_LIFE_TIME) {
1da177e4 3446 long tval = (jiffies - ifa->tstamp)/HZ;
a1faa698
JR		 3447 if (preferred > tval)
3448 preferred -= tval;
3449 else
3450 preferred = 0;
85486af0
TG		 3451 if (valid != INFINITY_LIFE_TIME)
3452 valid -= tval;
1da177e4
LT		 3453 }
3454 } else {
85486af0
TG		 3455 preferred = INFINITY_LIFE_TIME;
3456 valid = INFINITY_LIFE_TIME;
3457 }
3458
0ab6803b 3459 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
26932566
PM		 3460 put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
3461 nlmsg_cancel(skb, nlh);
3462 return -EMSGSIZE;
3463 }
1da177e4 3464
0ab6803b 3465 return nlmsg_end(skb, nlh);
1da177e4
LT		 3466}
3467
3468static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
e431b8c0 3469 u32 pid, u32 seq, int event, u16 flags)
1da177e4 3470{
1da177e4 3471 struct nlmsghdr *nlh;
101bb229
TG		 3472 u8 scope = RT_SCOPE_UNIVERSE;
3473 int ifindex = ifmca->idev->dev->ifindex;
3474
3475 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3476 scope = RT_SCOPE_SITE;
1da177e4 3477
0ab6803b
TG		 3478 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3479 if (nlh == NULL)
26932566 3480 return -EMSGSIZE;
85486af0 3481
0ab6803b
TG		 3482 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3483 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3484 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
26932566
PM		 3485 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3486 nlmsg_cancel(skb, nlh);
3487 return -EMSGSIZE;
3488 }
85486af0 3489
0ab6803b 3490 return nlmsg_end(skb, nlh);
1da177e4
LT		 3491}
3492
3493static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
b6544c0b 3494 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3495{
1da177e4 3496 struct nlmsghdr *nlh;
101bb229
TG		 3497 u8 scope = RT_SCOPE_UNIVERSE;
3498 int ifindex = ifaca->aca_idev->dev->ifindex;
3499
3500 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3501 scope = RT_SCOPE_SITE;
1da177e4 3502
0ab6803b
TG		 3503 nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
3504 if (nlh == NULL)
26932566 3505 return -EMSGSIZE;
85486af0 3506
0ab6803b
TG		 3507 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3508 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3509 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
26932566
PM		 3510 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3511 nlmsg_cancel(skb, nlh);
3512 return -EMSGSIZE;
3513 }
1da177e4 3514
0ab6803b 3515 return nlmsg_end(skb, nlh);
1da177e4
LT		 3516}
3517
e21e8467 3518enum addr_type_t {
1da177e4
LT		 3519 UNICAST_ADDR,
3520 MULTICAST_ADDR,
3521 ANYCAST_ADDR,
3522};
3523
234b27c3
ED		 3524/* called with rcu_read_lock() */
3525static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3526 struct netlink_callback *cb, enum addr_type_t type,
3527 int s_ip_idx, int *p_ip_idx)
3528{
234b27c3
ED		 3529 struct ifmcaddr6 *ifmca;
3530 struct ifacaddr6 *ifaca;
3531 int err = 1;
3532 int ip_idx = *p_ip_idx;
3533
3534 read_lock_bh(&idev->lock);
3535 switch (type) {
502a2ffd 3536 case UNICAST_ADDR: {
3537 struct inet6_ifaddr *ifa;
3538
234b27c3 3539 /* unicast address incl. temp addr */
502a2ffd 3540 list_for_each_entry(ifa, &idev->addr_list, if_list) {
3541 if (++ip_idx < s_ip_idx)
234b27c3
ED		 3542 continue;
3543 err = inet6_fill_ifaddr(skb, ifa,
3544 NETLINK_CB(cb->skb).pid,
3545 cb->nlh->nlmsg_seq,
3546 RTM_NEWADDR,
3547 NLM_F_MULTI);
3548 if (err <= 0)
3549 break;
3550 }
3551 break;
502a2ffd 3552 }
234b27c3
ED		 3553 case MULTICAST_ADDR:
3554 /* multicast address */
3555 for (ifmca = idev->mc_list; ifmca;
3556 ifmca = ifmca->next, ip_idx++) {
3557 if (ip_idx < s_ip_idx)
3558 continue;
3559 err = inet6_fill_ifmcaddr(skb, ifmca,
3560 NETLINK_CB(cb->skb).pid,
3561 cb->nlh->nlmsg_seq,
3562 RTM_GETMULTICAST,
3563 NLM_F_MULTI);
3564 if (err <= 0)
3565 break;
3566 }
3567 break;
3568 case ANYCAST_ADDR:
3569 /* anycast address */
3570 for (ifaca = idev->ac_list; ifaca;
3571 ifaca = ifaca->aca_next, ip_idx++) {
3572 if (ip_idx < s_ip_idx)
3573 continue;
3574 err = inet6_fill_ifacaddr(skb, ifaca,
3575 NETLINK_CB(cb->skb).pid,
3576 cb->nlh->nlmsg_seq,
3577 RTM_GETANYCAST,
3578 NLM_F_MULTI);
3579 if (err <= 0)
3580 break;
3581 }
3582 break;
3583 default:
3584 break;
3585 }
3586 read_unlock_bh(&idev->lock);
3587 *p_ip_idx = ip_idx;
3588 return err;
3589}
3590
1da177e4
LT		 3591static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3592 enum addr_type_t type)
3593{
234b27c3
ED		 3594 struct net *net = sock_net(skb->sk);
3595 int h, s_h;
1da177e4
LT		 3596 int idx, ip_idx;
3597 int s_idx, s_ip_idx;
1da177e4 3598 struct net_device *dev;
234b27c3
ED		 3599 struct inet6_dev *idev;
3600 struct hlist_head *head;
3601 struct hlist_node *node;
1ab1457c 3602
234b27c3
ED		 3603 s_h = cb->args[0];
3604 s_idx = idx = cb->args[1];
3605 s_ip_idx = ip_idx = cb->args[2];
5d5619b4 3606
234b27c3
ED		 3607 rcu_read_lock();
3608 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3609 idx = 0;
3610 head = &net->dev_index_head[h];
3611 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3612 if (idx < s_idx)
3613 goto cont;
4b97efdf 3614 if (h > s_h || idx > s_idx)
234b27c3
ED		 3615 s_ip_idx = 0;
3616 ip_idx = 0;
e21e8467
SH		 3617 idev = __in6_dev_get(dev);
3618 if (!idev)
234b27c3
ED		 3619 goto cont;
3620
3621 if (in6_dump_addrs(idev, skb, cb, type,
3622 s_ip_idx, &ip_idx) <= 0)
3623 goto done;
7562f876 3624cont:
234b27c3
ED		 3625 idx++;
3626 }
1da177e4 3627 }
234b27c3
ED		 3628done:
3629 rcu_read_unlock();
3630 cb->args[0] = h;
3631 cb->args[1] = idx;
3632 cb->args[2] = ip_idx;
3633
1da177e4
LT		 3634 return skb->len;
3635}
3636
3637static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3638{
3639 enum addr_type_t type = UNICAST_ADDR;
b854272b 3640
1da177e4
LT		 3641 return inet6_dump_addr(skb, cb, type);
3642}
3643
3644static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3645{
3646 enum addr_type_t type = MULTICAST_ADDR;
b854272b 3647
1da177e4
LT		 3648 return inet6_dump_addr(skb, cb, type);
3649}
3650
3651
3652static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3653{
3654 enum addr_type_t type = ANYCAST_ADDR;
b854272b 3655
1da177e4
LT		 3656 return inet6_dump_addr(skb, cb, type);
3657}
3658
1b29fc2c
TG		 3659static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
3660 void *arg)
6c223828 3661{
3b1e0a65 3662 struct net *net = sock_net(in_skb->sk);
1b29fc2c
TG		 3663 struct ifaddrmsg *ifm;
3664 struct nlattr *tb[IFA_MAX+1];
6c223828
NT		 3665 struct in6_addr *addr = NULL;
3666 struct net_device *dev = NULL;
3667 struct inet6_ifaddr *ifa;
3668 struct sk_buff *skb;
6c223828
NT		 3669 int err;
3670
1b29fc2c
TG		 3671 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3672 if (err < 0)
3673 goto errout;
3674
3675 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
3676 if (addr == NULL) {
3677 err = -EINVAL;
3678 goto errout;
6c223828 3679 }
6c223828 3680
1b29fc2c 3681 ifm = nlmsg_data(nlh);
6c223828 3682 if (ifm->ifa_index)
6fda7350 3683 dev = __dev_get_by_index(net, ifm->ifa_index);
6c223828 3684
e21e8467
SH		 3685 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
3686 if (!ifa) {
1b29fc2c
TG		 3687 err = -EADDRNOTAVAIL;
3688 goto errout;
3689 }
6c223828 3690
e21e8467
SH		 3691 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
3692 if (!skb) {
6c223828 3693 err = -ENOBUFS;
1b29fc2c 3694 goto errout_ifa;
6c223828
NT		 3695 }
3696
6c223828
NT		 3697 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
3698 nlh->nlmsg_seq, RTM_NEWADDR, 0);
26932566
PM		 3699 if (err < 0) {
3700 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3701 WARN_ON(err == -EMSGSIZE);
3702 kfree_skb(skb);
3703 goto errout_ifa;
3704 }
6fda7350 3705 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
1b29fc2c 3706errout_ifa:
6c223828 3707 in6_ifa_put(ifa);
1b29fc2c 3708errout:
6c223828 3709 return err;
6c223828
NT		 3710}
3711
1da177e4
LT		 3712static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
3713{
3714 struct sk_buff *skb;
c346dca1 3715 struct net *net = dev_net(ifa->idev->dev);
5d620266 3716 int err = -ENOBUFS;
1da177e4 3717
0ab6803b 3718 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
5d620266
TG		 3719 if (skb == NULL)
3720 goto errout;
3721
3722 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 3723 if (err < 0) {
3724 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3725 WARN_ON(err == -EMSGSIZE);
3726 kfree_skb(skb);
3727 goto errout;
3728 }
1ce85fe4
PNA		 3729 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3730 return;
5d620266
TG		 3731errout:
3732 if (err < 0)
6fda7350 3733 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3734}
3735
b6f99a21 3736static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
1da177e4
LT		 3737 __s32 *array, int bytes)
3738{
04561c1f
TG		 3739 BUG_ON(bytes < (DEVCONF_MAX * 4));
3740
1da177e4
LT		 3741 memset(array, 0, bytes);
3742 array[DEVCONF_FORWARDING] = cnf->forwarding;
3743 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
3744 array[DEVCONF_MTU6] = cnf->mtu6;
3745 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
3746 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
3747 array[DEVCONF_AUTOCONF] = cnf->autoconf;
3748 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
3749 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
3750 array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
3751 array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
3752 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
3753#ifdef CONFIG_IPV6_PRIVACY
3754 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
3755 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
3756 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
3757 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
3758 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3759#endif
3760 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
65f5c7c1 3761 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
c4fd30eb 3762 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
930d6ff2
YH		 3763#ifdef CONFIG_IPV6_ROUTER_PREF
3764 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
52e16356 3765 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
fa03ef38 3766#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4
YH		 3767 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3768#endif
930d6ff2 3769#endif
fbea49e1 3770 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
0bcbc926 3771 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
95c385b4
NH		 3772#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3773 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
3774#endif
7bc570c8
YH		 3775#ifdef CONFIG_IPV6_MROUTE
3776 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
3777#endif
778d80be 3778 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
1b34be74 3779 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
c3faca05 3780 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
1da177e4
LT		 3781}
3782
339bf98f
TG		 3783static inline size_t inet6_if_nlmsg_size(void)
3784{
3785 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3786 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3787 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3788 + nla_total_size(4) /* IFLA_MTU */
3789 + nla_total_size(4) /* IFLA_LINK */
3790 + nla_total_size( /* IFLA_PROTINFO */
3791 nla_total_size(4) /* IFLA_INET6_FLAGS */
3792 + nla_total_size(sizeof(struct ifla_cacheinfo))
3793 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
bf99f1bd
YH		 3794 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
3795 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
339bf98f
TG		 3796 );
3797}
c5396a31 3798
7d720c3e
TH		 3799static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
3800 int items, int bytes)
7f7d9a6b
HX		 3801{
3802 int i;
3803 int pad = bytes - sizeof(u64) * items;
3804 BUG_ON(pad < 0);
3805
3806 /* Use put_unaligned() because stats may not be aligned for u64. */
3807 put_unaligned(items, &stats[0]);
3808 for (i = 1; i < items; i++)
3809 put_unaligned(snmp_fold_field(mib, i), &stats[i]);
3810
3811 memset(&stats[items], 0, pad);
3812}
3813
3814static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
3815 int bytes)
3816{
e21e8467 3817 switch (attrtype) {
7f7d9a6b 3818 case IFLA_INET6_STATS:
7d720c3e 3819 __snmp6_fill_stats(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
7f7d9a6b
HX		 3820 break;
3821 case IFLA_INET6_ICMP6STATS:
7d720c3e 3822 __snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
7f7d9a6b
HX		 3823 break;
3824 }
3825}
3826
1ab1457c 3827static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
b6544c0b 3828 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4 3829{
04561c1f 3830 struct net_device *dev = idev->dev;
bf99f1bd 3831 struct nlattr *nla;
04561c1f
TG		 3832 struct ifinfomsg *hdr;
3833 struct nlmsghdr *nlh;
3834 void *protoinfo;
3835 struct ifla_cacheinfo ci;
3836
3837 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
3838 if (nlh == NULL)
26932566 3839 return -EMSGSIZE;
04561c1f
TG		 3840
3841 hdr = nlmsg_data(nlh);
3842 hdr->ifi_family = AF_INET6;
3843 hdr->__ifi_pad = 0;
3844 hdr->ifi_type = dev->type;
3845 hdr->ifi_index = dev->ifindex;
3846 hdr->ifi_flags = dev_get_flags(dev);
3847 hdr->ifi_change = 0;
3848
3849 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
1da177e4
LT		 3850
3851 if (dev->addr_len)
04561c1f 3852 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
1da177e4 3853
04561c1f 3854 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
1da177e4 3855 if (dev->ifindex != dev->iflink)
04561c1f 3856 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
1da177e4 3857
04561c1f
TG		 3858 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
3859 if (protoinfo == NULL)
3860 goto nla_put_failure;
1da177e4 3861
04561c1f 3862 NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
1da177e4 3863
1da177e4
LT		 3864 ci.max_reasm_len = IPV6_MAXPLEN;
3865 ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
3866 + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
3867 ci.reachable_time = idev->nd_parms->reachable_time;
3868 ci.retrans_time = idev->nd_parms->retrans_time;
04561c1f
TG		 3869 NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
3870
bf99f1bd
YH		 3871 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
3872 if (nla == NULL)
04561c1f 3873 goto nla_put_failure;
bf99f1bd 3874 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
1da177e4 3875
bf99f1bd
YH		 3876 /* XXX - MC not implemented */
3877
3878 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
3879 if (nla == NULL)
3880 goto nla_put_failure;
3881 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
3882
3883 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
3884 if (nla == NULL)
3885 goto nla_put_failure;
3886 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
1da177e4 3887
04561c1f
TG		 3888 nla_nest_end(skb, protoinfo);
3889 return nlmsg_end(skb, nlh);
1da177e4 3890
04561c1f 3891nla_put_failure:
26932566
PM		 3892 nlmsg_cancel(skb, nlh);
3893 return -EMSGSIZE;
1da177e4
LT		 3894}
3895
3896static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
3897{
3b1e0a65 3898 struct net *net = sock_net(skb->sk);
84d2697d 3899 int h, s_h;
434a8a58 3900 int idx = 0, s_idx;
1da177e4
LT		 3901 struct net_device *dev;
3902 struct inet6_dev *idev;
84d2697d
ED		 3903 struct hlist_head *head;
3904 struct hlist_node *node;
1da177e4 3905
84d2697d
ED		 3906 s_h = cb->args[0];
3907 s_idx = cb->args[1];
3908
3909 rcu_read_lock();
3910 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3911 idx = 0;
3912 head = &net->dev_index_head[h];
3913 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
3914 if (idx < s_idx)
3915 goto cont;
3916 idev = __in6_dev_get(dev);
3917 if (!idev)
3918 goto cont;
3919 if (inet6_fill_ifinfo(skb, idev,
3920 NETLINK_CB(cb->skb).pid,
3921 cb->nlh->nlmsg_seq,
3922 RTM_NEWLINK, NLM_F_MULTI) <= 0)
3923 goto out;
7562f876 3924cont:
84d2697d
ED		 3925 idx++;
3926 }
1da177e4 3927 }
84d2697d
ED		 3928out:
3929 rcu_read_unlock();
3930 cb->args[1] = idx;
3931 cb->args[0] = h;
1da177e4
LT		 3932
3933 return skb->len;
3934}
3935
3936void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
3937{
3938 struct sk_buff *skb;
c346dca1 3939 struct net *net = dev_net(idev->dev);
8d7a76c9 3940 int err = -ENOBUFS;
1ab1457c 3941
339bf98f 3942 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
8d7a76c9
TG		 3943 if (skb == NULL)
3944 goto errout;
3945
3946 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
26932566
PM		 3947 if (err < 0) {
3948 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3949 WARN_ON(err == -EMSGSIZE);
3950 kfree_skb(skb);
3951 goto errout;
3952 }
1ce85fe4
PNA		 3953 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
3954 return;
8d7a76c9
TG		 3955errout:
3956 if (err < 0)
6fda7350 3957 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
1da177e4
LT		 3958}
3959
339bf98f
TG		 3960static inline size_t inet6_prefix_nlmsg_size(void)
3961{
3962 return NLMSG_ALIGN(sizeof(struct prefixmsg))
3963 + nla_total_size(sizeof(struct in6_addr))
3964 + nla_total_size(sizeof(struct prefix_cacheinfo));
3965}
c5396a31 3966
1da177e4 3967static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
6051e2f4
TG		 3968 struct prefix_info *pinfo, u32 pid, u32 seq,
3969 int event, unsigned int flags)
1da177e4 3970{
6051e2f4
TG		 3971 struct prefixmsg *pmsg;
3972 struct nlmsghdr *nlh;
1da177e4
LT		 3973 struct prefix_cacheinfo ci;
3974
6051e2f4
TG		 3975 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
3976 if (nlh == NULL)
26932566 3977 return -EMSGSIZE;
6051e2f4
TG		 3978
3979 pmsg = nlmsg_data(nlh);
1da177e4 3980 pmsg->prefix_family = AF_INET6;
8a47077a
PM		 3981 pmsg->prefix_pad1 = 0;
3982 pmsg->prefix_pad2 = 0;
1da177e4
LT		 3983 pmsg->prefix_ifindex = idev->dev->ifindex;
3984 pmsg->prefix_len = pinfo->prefix_len;
3985 pmsg->prefix_type = pinfo->type;
8a47077a 3986 pmsg->prefix_pad3 = 0;
1da177e4
LT		 3987 pmsg->prefix_flags = 0;
3988 if (pinfo->onlink)
3989 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
3990 if (pinfo->autoconf)
3991 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
3992
6051e2f4 3993 NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
1da177e4
LT		 3994
3995 ci.preferred_time = ntohl(pinfo->prefered);
3996 ci.valid_time = ntohl(pinfo->valid);
6051e2f4 3997 NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
1da177e4 3998
6051e2f4 3999 return nlmsg_end(skb, nlh);
1da177e4 4000
6051e2f4 4001nla_put_failure:
26932566
PM		 4002 nlmsg_cancel(skb, nlh);
4003 return -EMSGSIZE;
1da177e4
LT		 4004}
4005
1ab1457c 4006static void inet6_prefix_notify(int event, struct inet6_dev *idev,
1da177e4
LT		 4007 struct prefix_info *pinfo)
4008{
4009 struct sk_buff *skb;
c346dca1 4010 struct net *net = dev_net(idev->dev);
8c384bfa 4011 int err = -ENOBUFS;
1da177e4 4012
339bf98f 4013 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
8c384bfa
TG		 4014 if (skb == NULL)
4015 goto errout;
4016
4017 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
26932566
PM		 4018 if (err < 0) {
4019 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4020 WARN_ON(err == -EMSGSIZE);
4021 kfree_skb(skb);
4022 goto errout;
4023 }
1ce85fe4
PNA		 4024 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4025 return;
8c384bfa
TG		 4026errout:
4027 if (err < 0)
6fda7350 4028 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
1da177e4
LT		 4029}
4030
1da177e4
LT		 4031static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4032{
4033 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4034
4035 switch (event) {
4036 case RTM_NEWADDR:
95c385b4
NH		 4037 /*
4038 * If the address was optimistic
4039 * we inserted the route at the start of
4040 * our DAD process, so we don't need
4041 * to do it again
4042 */
4043 if (!(ifp->rt->rt6i_node))
4044 ip6_ins_rt(ifp->rt);
1da177e4
LT		 4045 if (ifp->idev->cnf.forwarding)
4046 addrconf_join_anycast(ifp);
4047 break;
4048 case RTM_DELADDR:
4049 if (ifp->idev->cnf.forwarding)
4050 addrconf_leave_anycast(ifp);
4051 addrconf_leave_solict(ifp->idev, &ifp->addr);
4052 dst_hold(&ifp->rt->u.dst);
93fa159a 4053
e9d3e084
HX		 4054 if (ifp->state == INET6_IFADDR_STATE_DEAD &&
4055 ip6_del_rt(ifp->rt))
1da177e4 4056 dst_free(&ifp->rt->u.dst);
1da177e4
LT		 4057 break;
4058 }
4059}
4060
4061static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4062{
8814c4b5 4063 rcu_read_lock_bh();
1da177e4
LT		 4064 if (likely(ifp->idev->dead == 0))
4065 __ipv6_ifa_notify(event, ifp);
8814c4b5 4066 rcu_read_unlock_bh();
1da177e4
LT		 4067}
4068
4069#ifdef CONFIG_SYSCTL
4070
4071static
8d65af78 4072int addrconf_sysctl_forward(ctl_table *ctl, int write,
1da177e4
LT		 4073 void __user *buffer, size_t *lenp, loff_t *ppos)
4074{
4075 int *valp = ctl->data;
4076 int val = *valp;
88af182e 4077 loff_t pos = *ppos;
1da177e4
LT		 4078 int ret;
4079
8d65af78 4080 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 4081
c8fecf22 4082 if (write)
b325fddb 4083 ret = addrconf_fixup_forwarding(ctl, valp, val);
88af182e
EB		 4084 if (ret)
4085 *ppos = pos;
1ab1457c 4086 return ret;
1da177e4
LT		 4087}
4088
56d417b1
BH		 4089static void dev_disable_change(struct inet6_dev *idev)
4090{
4091 if (!idev || !idev->dev)
4092 return;
4093
4094 if (idev->cnf.disable_ipv6)
4095 addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
4096 else
4097 addrconf_notify(NULL, NETDEV_UP, idev->dev);
4098}
4099
4100static void addrconf_disable_change(struct net *net, __s32 newf)
4101{
4102 struct net_device *dev;
4103 struct inet6_dev *idev;
4104
c6d14c84
ED		 4105 rcu_read_lock();
4106 for_each_netdev_rcu(net, dev) {
56d417b1
BH		 4107 idev = __in6_dev_get(dev);
4108 if (idev) {
4109 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4110 idev->cnf.disable_ipv6 = newf;
4111 if (changed)
4112 dev_disable_change(idev);
4113 }
56d417b1 4114 }
c6d14c84 4115 rcu_read_unlock();
56d417b1
BH		 4116}
4117
4118static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old)
4119{
4120 struct net *net;
4121
4122 net = (struct net *)table->extra2;
4123
4124 if (p == &net->ipv6.devconf_dflt->disable_ipv6)
4125 return 0;
4126
88af182e
EB		 4127 if (!rtnl_trylock()) {
4128 /* Restore the original values before restarting */
4129 *p = old;
56d417b1 4130 return restart_syscall();
88af182e 4131 }
56d417b1
BH		 4132
4133 if (p == &net->ipv6.devconf_all->disable_ipv6) {
4134 __s32 newf = net->ipv6.devconf_all->disable_ipv6;
4135 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4136 addrconf_disable_change(net, newf);
4137 } else if ((!*p) ^ (!old))
4138 dev_disable_change((struct inet6_dev *)table->extra1);
4139
4140 rtnl_unlock();
4141 return 0;
4142}
4143
4144static
8d65af78 4145int addrconf_sysctl_disable(ctl_table *ctl, int write,
56d417b1
BH		 4146 void __user *buffer, size_t *lenp, loff_t *ppos)
4147{
4148 int *valp = ctl->data;
4149 int val = *valp;
88af182e 4150 loff_t pos = *ppos;
56d417b1
BH		 4151 int ret;
4152
8d65af78 4153 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
56d417b1
BH		 4154
4155 if (write)
4156 ret = addrconf_disable_ipv6(ctl, valp, val);
88af182e
EB		 4157 if (ret)
4158 *ppos = pos;
56d417b1
BH		 4159 return ret;
4160}
4161
1da177e4
LT		 4162static struct addrconf_sysctl_table
4163{
4164 struct ctl_table_header *sysctl_header;
f6a07b29 4165 ctl_table addrconf_vars[DEVCONF_MAX+1];
1dab6222 4166 char *dev_name;
ab32ea5d 4167} addrconf_sysctl __read_mostly = {
1da177e4
LT		 4168 .sysctl_header = NULL,
4169 .addrconf_vars = {
1ab1457c 4170 {
e21e8467
SH		 4171 .procname = "forwarding",
4172 .data = &ipv6_devconf.forwarding,
4173 .maxlen = sizeof(int),
4174 .mode = 0644,
4175 .proc_handler = addrconf_sysctl_forward,
1da177e4
LT		 4176 },
4177 {
e21e8467
SH		 4178 .procname = "hop_limit",
4179 .data = &ipv6_devconf.hop_limit,
4180 .maxlen = sizeof(int),
4181 .mode = 0644,
4182 .proc_handler = proc_dointvec,
1da177e4
LT		 4183 },
4184 {
e21e8467
SH		 4185 .procname = "mtu",
4186 .data = &ipv6_devconf.mtu6,
4187 .maxlen = sizeof(int),
4188 .mode = 0644,
4189 .proc_handler = proc_dointvec,
1da177e4
LT		 4190 },
4191 {
e21e8467
SH		 4192 .procname = "accept_ra",
4193 .data = &ipv6_devconf.accept_ra,
4194 .maxlen = sizeof(int),
4195 .mode = 0644,
4196 .proc_handler = proc_dointvec,
1da177e4
LT		 4197 },
4198 {
e21e8467
SH		 4199 .procname = "accept_redirects",
4200 .data = &ipv6_devconf.accept_redirects,
4201 .maxlen = sizeof(int),
4202 .mode = 0644,
4203 .proc_handler = proc_dointvec,
1da177e4
LT		 4204 },
4205 {
e21e8467
SH		 4206 .procname = "autoconf",
4207 .data = &ipv6_devconf.autoconf,
4208 .maxlen = sizeof(int),
4209 .mode = 0644,
4210 .proc_handler = proc_dointvec,
1da177e4
LT		 4211 },
4212 {
e21e8467
SH		 4213 .procname = "dad_transmits",
4214 .data = &ipv6_devconf.dad_transmits,
4215 .maxlen = sizeof(int),
4216 .mode = 0644,
4217 .proc_handler = proc_dointvec,
1da177e4
LT		 4218 },
4219 {
e21e8467
SH		 4220 .procname = "router_solicitations",
4221 .data = &ipv6_devconf.rtr_solicits,
4222 .maxlen = sizeof(int),
4223 .mode = 0644,
4224 .proc_handler = proc_dointvec,
1da177e4
LT		 4225 },
4226 {
e21e8467
SH		 4227 .procname = "router_solicitation_interval",
4228 .data = &ipv6_devconf.rtr_solicit_interval,
4229 .maxlen = sizeof(int),
4230 .mode = 0644,
4231 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4232 },
4233 {
e21e8467
SH		 4234 .procname = "router_solicitation_delay",
4235 .data = &ipv6_devconf.rtr_solicit_delay,
4236 .maxlen = sizeof(int),
4237 .mode = 0644,
4238 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 4239 },
4240 {
e21e8467
SH		 4241 .procname = "force_mld_version",
4242 .data = &ipv6_devconf.force_mld_version,
4243 .maxlen = sizeof(int),
4244 .mode = 0644,
4245 .proc_handler = proc_dointvec,
1da177e4
LT		 4246 },
4247#ifdef CONFIG_IPV6_PRIVACY
4248 {
e21e8467
SH		 4249 .procname = "use_tempaddr",
4250 .data = &ipv6_devconf.use_tempaddr,
4251 .maxlen = sizeof(int),
4252 .mode = 0644,
4253 .proc_handler = proc_dointvec,
1da177e4
LT		 4254 },
4255 {
e21e8467
SH		 4256 .procname = "temp_valid_lft",
4257 .data = &ipv6_devconf.temp_valid_lft,
4258 .maxlen = sizeof(int),
4259 .mode = 0644,
4260 .proc_handler = proc_dointvec,
1da177e4
LT		 4261 },
4262 {
e21e8467
SH		 4263 .procname = "temp_prefered_lft",
4264 .data = &ipv6_devconf.temp_prefered_lft,
4265 .maxlen = sizeof(int),
4266 .mode = 0644,
4267 .proc_handler = proc_dointvec,
1da177e4
LT		 4268 },
4269 {
e21e8467
SH		 4270 .procname = "regen_max_retry",
4271 .data = &ipv6_devconf.regen_max_retry,
4272 .maxlen = sizeof(int),
4273 .mode = 0644,
4274 .proc_handler = proc_dointvec,
1da177e4
LT		 4275 },
4276 {
e21e8467
SH		 4277 .procname = "max_desync_factor",
4278 .data = &ipv6_devconf.max_desync_factor,
4279 .maxlen = sizeof(int),
4280 .mode = 0644,
4281 .proc_handler = proc_dointvec,
1da177e4
LT		 4282 },
4283#endif
4284 {
e21e8467
SH		 4285 .procname = "max_addresses",
4286 .data = &ipv6_devconf.max_addresses,
4287 .maxlen = sizeof(int),
4288 .mode = 0644,
4289 .proc_handler = proc_dointvec,
1da177e4 4290 },
65f5c7c1 4291 {
e21e8467
SH		 4292 .procname = "accept_ra_defrtr",
4293 .data = &ipv6_devconf.accept_ra_defrtr,
4294 .maxlen = sizeof(int),
4295 .mode = 0644,
4296 .proc_handler = proc_dointvec,
65f5c7c1 4297 },
c4fd30eb 4298 {
e21e8467
SH		 4299 .procname = "accept_ra_pinfo",
4300 .data = &ipv6_devconf.accept_ra_pinfo,
4301 .maxlen = sizeof(int),
4302 .mode = 0644,
4303 .proc_handler = proc_dointvec,
c4fd30eb 4304 },
930d6ff2
YH		 4305#ifdef CONFIG_IPV6_ROUTER_PREF
4306 {
e21e8467
SH		 4307 .procname = "accept_ra_rtr_pref",
4308 .data = &ipv6_devconf.accept_ra_rtr_pref,
4309 .maxlen = sizeof(int),
4310 .mode = 0644,
4311 .proc_handler = proc_dointvec,
930d6ff2 4312 },
52e16356 4313 {
e21e8467
SH		 4314 .procname = "router_probe_interval",
4315 .data = &ipv6_devconf.rtr_probe_interval,
4316 .maxlen = sizeof(int),
4317 .mode = 0644,
4318 .proc_handler = proc_dointvec_jiffies,
52e16356 4319 },
fa03ef38 4320#ifdef CONFIG_IPV6_ROUTE_INFO
09c884d4 4321 {
e21e8467
SH		 4322 .procname = "accept_ra_rt_info_max_plen",
4323 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4324 .maxlen = sizeof(int),
4325 .mode = 0644,
4326 .proc_handler = proc_dointvec,
09c884d4
YH		 4327 },
4328#endif
930d6ff2 4329#endif
fbea49e1 4330 {
e21e8467
SH		 4331 .procname = "proxy_ndp",
4332 .data = &ipv6_devconf.proxy_ndp,
4333 .maxlen = sizeof(int),
4334 .mode = 0644,
4335 .proc_handler = proc_dointvec,
fbea49e1 4336 },
0bcbc926 4337 {
e21e8467
SH		 4338 .procname = "accept_source_route",
4339 .data = &ipv6_devconf.accept_source_route,
4340 .maxlen = sizeof(int),
4341 .mode = 0644,
4342 .proc_handler = proc_dointvec,
0bcbc926 4343 },
95c385b4
NH		 4344#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4345 {
e21e8467
SH		 4346 .procname = "optimistic_dad",
4347 .data = &ipv6_devconf.optimistic_dad,
4348 .maxlen = sizeof(int),
4349 .mode = 0644,
4350 .proc_handler = proc_dointvec,
95c385b4
NH		 4351
4352 },
7bc570c8
YH		 4353#endif
4354#ifdef CONFIG_IPV6_MROUTE
4355 {
e21e8467
SH		 4356 .procname = "mc_forwarding",
4357 .data = &ipv6_devconf.mc_forwarding,
4358 .maxlen = sizeof(int),
4359 .mode = 0444,
4360 .proc_handler = proc_dointvec,
7bc570c8 4361 },
95c385b4 4362#endif
778d80be 4363 {
e21e8467
SH		 4364 .procname = "disable_ipv6",
4365 .data = &ipv6_devconf.disable_ipv6,
4366 .maxlen = sizeof(int),
4367 .mode = 0644,
4368 .proc_handler = addrconf_sysctl_disable,
778d80be 4369 },
1b34be74 4370 {
e21e8467
SH		 4371 .procname = "accept_dad",
4372 .data = &ipv6_devconf.accept_dad,
4373 .maxlen = sizeof(int),
4374 .mode = 0644,
4375 .proc_handler = proc_dointvec,
1b34be74 4376 },
f7734fdf 4377 {
f7734fdf
OP		 4378 .procname = "force_tllao",
4379 .data = &ipv6_devconf.force_tllao,
4380 .maxlen = sizeof(int),
4381 .mode = 0644,
4382 .proc_handler = proc_dointvec
4383 },
1da177e4 4384 {
f8572d8f 4385 /* sentinel */
1da177e4
LT		 4386 }
4387 },
1da177e4
LT		 4388};
4389
bff16c2f 4390static int __addrconf_sysctl_register(struct net *net, char *dev_name,
f8572d8f 4391 struct inet6_dev *idev, struct ipv6_devconf *p)
1da177e4
LT		 4392{
4393 int i;
1da177e4 4394 struct addrconf_sysctl_table *t;
1da177e4 4395
1dab6222
PE		 4396#define ADDRCONF_CTL_PATH_DEV 3
4397
4398 struct ctl_path addrconf_ctl_path[] = {
f8572d8f
EB		 4399 { .procname = "net", },
4400 { .procname = "ipv6", },
4401 { .procname = "conf", },
1dab6222
PE		 4402 { /* to be set */ },
4403 { },
4404 };
4405
4406
af879cc7 4407 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4 4408 if (t == NULL)
f68635e6
PE		 4409 goto out;
4410
bcdd553f 4411 for (i = 0; t->addrconf_vars[i].data; i++) {
e21e8467 4412 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
1da177e4 4413 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
bff16c2f 4414 t->addrconf_vars[i].extra2 = net;
1da177e4 4415 }
1da177e4 4416
1ab1457c
YH		 4417 /*
4418 * Make a copy of dev_name, because '.procname' is regarded as const
1da177e4
LT		 4419 * by sysctl and we wouldn't want anyone to change it under our feet
4420 * (see SIOCSIFNAME).
1ab1457c 4421 */
1dab6222
PE		 4422 t->dev_name = kstrdup(dev_name, GFP_KERNEL);
4423 if (!t->dev_name)
f68635e6 4424 goto free;
1da177e4 4425
1dab6222 4426 addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name;
1da177e4 4427
bff16c2f 4428 t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path,
1dab6222 4429 t->addrconf_vars);
1da177e4
LT		 4430 if (t->sysctl_header == NULL)
4431 goto free_procname;
f68635e6
PE		 4432
4433 p->sysctl = t;
95897312 4434 return 0;
1da177e4 4435
f68635e6 4436free_procname:
1dab6222 4437 kfree(t->dev_name);
f68635e6 4438free:
1da177e4 4439 kfree(t);
f68635e6 4440out:
95897312 4441 return -ENOBUFS;
1da177e4
LT		 4442}
4443
408c4768
PE		 4444static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4445{
4446 struct addrconf_sysctl_table *t;
4447
4448 if (p->sysctl == NULL)
4449 return;
4450
4451 t = p->sysctl;
4452 p->sysctl = NULL;
4453 unregister_sysctl_table(t->sysctl_header);
4454 kfree(t->dev_name);
4455 kfree(t);
4456}
4457
f52295a9
PE		 4458static void addrconf_sysctl_register(struct inet6_dev *idev)
4459{
54716e3b 4460 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
f8572d8f 4461 &ndisc_ifinfo_sysctl_change);
c346dca1 4462 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
f8572d8f 4463 idev, &idev->cnf);
f52295a9
PE		 4464}
4465
408c4768 4466static void addrconf_sysctl_unregister(struct inet6_dev *idev)
1da177e4 4467{
408c4768
PE		 4468 __addrconf_sysctl_unregister(&idev->cnf);
4469 neigh_sysctl_unregister(idev->nd_parms);
1da177e4
LT		 4470}
4471
4472
4473#endif
4474
2c8c1e72 4475static int __net_init addrconf_init_net(struct net *net)
e0da5a48
PE		 4476{
4477 int err;
4478 struct ipv6_devconf *all, *dflt;
4479
4480 err = -ENOMEM;
4481 all = &ipv6_devconf;
4482 dflt = &ipv6_devconf_dflt;
4483
09ad9bc7 4484 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4485 all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL);
4486 if (all == NULL)
4487 goto err_alloc_all;
4488
4489 dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
4490 if (dflt == NULL)
4491 goto err_alloc_dflt;
56d417b1
BH		 4492 } else {
4493 /* these will be inherited by all namespaces */
4494 dflt->autoconf = ipv6_defaults.autoconf;
4495 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
e0da5a48
PE		 4496 }
4497
4498 net->ipv6.devconf_all = all;
4499 net->ipv6.devconf_dflt = dflt;
4500
4501#ifdef CONFIG_SYSCTL
f8572d8f 4502 err = __addrconf_sysctl_register(net, "all", NULL, all);
e0da5a48
PE		 4503 if (err < 0)
4504 goto err_reg_all;
4505
f8572d8f 4506 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
e0da5a48
PE		 4507 if (err < 0)
4508 goto err_reg_dflt;
4509#endif
4510 return 0;
4511
4512#ifdef CONFIG_SYSCTL
4513err_reg_dflt:
4514 __addrconf_sysctl_unregister(all);
4515err_reg_all:
4516 kfree(dflt);
4517#endif
4518err_alloc_dflt:
4519 kfree(all);
4520err_alloc_all:
4521 return err;
4522}
4523
2c8c1e72 4524static void __net_exit addrconf_exit_net(struct net *net)
e0da5a48
PE		 4525{
4526#ifdef CONFIG_SYSCTL
4527 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
4528 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
4529#endif
09ad9bc7 4530 if (!net_eq(net, &init_net)) {
e0da5a48
PE		 4531 kfree(net->ipv6.devconf_dflt);
4532 kfree(net->ipv6.devconf_all);
4533 }
4534}
4535
4536static struct pernet_operations addrconf_ops = {
4537 .init = addrconf_init_net,
4538 .exit = addrconf_exit_net,
4539};
4540
1da177e4
LT		 4541/*
4542 * Device notifier
4543 */
4544
4545int register_inet6addr_notifier(struct notifier_block *nb)
4546{
1ab1457c 4547 return atomic_notifier_chain_register(&inet6addr_chain, nb);
1da177e4 4548}
7159039a
YH		 4549EXPORT_SYMBOL(register_inet6addr_notifier);
4550
1da177e4
LT		 4551int unregister_inet6addr_notifier(struct notifier_block *nb)
4552{
e21e8467 4553 return atomic_notifier_chain_unregister(&inet6addr_chain, nb);
1da177e4 4554}
7159039a
YH		 4555EXPORT_SYMBOL(unregister_inet6addr_notifier);
4556
1da177e4
LT		 4557/*
4558 * Init / cleanup code
4559 */
4560
4561int __init addrconf_init(void)
4562{
c2e21293 4563 int i, err;
2a8cc6c8 4564
e21e8467
SH		 4565 err = ipv6_addr_label_init();
4566 if (err < 0) {
4567 printk(KERN_CRIT "IPv6 Addrconf:"
4568 " cannot initialize default policy table: %d.\n", err);
2a8cc6c8
YH		 4569 return err;
4570 }
1da177e4 4571
e0da5a48
PE		 4572 register_pernet_subsys(&addrconf_ops);
4573
1da177e4
LT		 4574 /* The addrconf netdev notifier requires that loopback_dev
4575 * has it's ipv6 private information allocated and setup
4576 * before it can bring up and give link-local addresses
4577 * to other devices which are up.
4578 *
4579 * Unfortunately, loopback_dev is not necessarily the first
4580 * entry in the global dev_base list of net devices. In fact,
4581 * it is likely to be the very last entry on that list.
4582 * So this causes the notifier registry below to try and
4583 * give link-local addresses to all devices besides loopback_dev
4584 * first, then loopback_dev, which cases all the non-loopback_dev
4585 * devices to fail to get a link-local address.
4586 *
4587 * So, as a temporary fix, allocate the ipv6 structure for
4588 * loopback_dev first by hand.
4589 * Longer term, all of the dependencies ipv6 has upon the loopback
4590 * device and it being up should be removed.
4591 */
4592 rtnl_lock();
2774c7ab 4593 if (!ipv6_add_dev(init_net.loopback_dev))
1da177e4
LT		 4594 err = -ENOMEM;
4595 rtnl_unlock();
4596 if (err)
e0da5a48 4597 goto errlo;
1da177e4 4598
c2e21293 4599 for (i = 0; i < IN6_ADDR_HSIZE; i++)
4600 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
4601
1da177e4
LT		 4602 register_netdevice_notifier(&ipv6_dev_notf);
4603
1da177e4 4604 addrconf_verify(0);
c127ea2c
TG		 4605
4606 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
4607 if (err < 0)
4608 goto errout;
4609
4610 /* Only the first call to __rtnl_register can fail */
4611 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
4612 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
4613 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
4614 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
4615 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
4616
2a8cc6c8
YH		 4617 ipv6_addr_label_rtnl_register();
4618
1da177e4 4619 return 0;
c127ea2c
TG		 4620errout:
4621 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48
PE		 4622errlo:
4623 unregister_pernet_subsys(&addrconf_ops);
c127ea2c
TG		 4624
4625 return err;
1da177e4
LT		 4626}
4627
09f7709f 4628void addrconf_cleanup(void)
1da177e4 4629{
176c39af 4630 struct net_device *dev;
1da177e4
LT		 4631 int i;
4632
4633 unregister_netdevice_notifier(&ipv6_dev_notf);
e0da5a48 4634 unregister_pernet_subsys(&addrconf_ops);
1da177e4
LT		 4635
4636 rtnl_lock();
4637
176c39af
DL		 4638 /* clean dev list */
4639 for_each_netdev(&init_net, dev) {
4640 if (__in6_dev_get(dev) == NULL)
4641 continue;
4642 addrconf_ifdown(dev, 1);
4643 }
4644 addrconf_ifdown(init_net.loopback_dev, 2);
4645
1da177e4
LT		 4646 /*
4647 * Check hash table.
4648 */
5c578aed 4649 spin_lock_bh(&addrconf_hash_lock);
c2e21293 4650 for (i = 0; i < IN6_ADDR_HSIZE; i++)
4651 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
5c578aed 4652 spin_unlock_bh(&addrconf_hash_lock);
1da177e4
LT		 4653
4654 del_timer(&addr_chk_timer);
1da177e4 4655 rtnl_unlock();
1da177e4 4656}
Clone of davem's net-next-2.6 tree