Commit | Line | Data |
---|---|---|
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 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 LT |
48 | #include <linux/net.h> |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
5a0e3ad6 | 58 | #include <linux/slab.h> |
1da177e4 LT |
59 | #ifdef CONFIG_SYSCTL |
60 | #include <linux/sysctl.h> | |
61 | #endif | |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/delay.h> |
64 | #include <linux/notifier.h> | |
543537bd | 65 | #include <linux/string.h> |
ddbe5032 | 66 | #include <linux/hash.h> |
1da177e4 | 67 | |
457c4cbc | 68 | #include <net/net_namespace.h> |
1da177e4 LT |
69 | #include <net/sock.h> |
70 | #include <net/snmp.h> | |
71 | ||
06a4c1c5 | 72 | #include <net/af_ieee802154.h> |
1da177e4 LT |
73 | #include <net/ipv6.h> |
74 | #include <net/protocol.h> | |
75 | #include <net/ndisc.h> | |
76 | #include <net/ip6_route.h> | |
77 | #include <net/addrconf.h> | |
78 | #include <net/tcp.h> | |
79 | #include <net/ip.h> | |
5d620266 | 80 | #include <net/netlink.h> |
f24e3d65 | 81 | #include <net/pkt_sched.h> |
1da177e4 LT |
82 | #include <linux/if_tunnel.h> |
83 | #include <linux/rtnetlink.h> | |
84 | ||
85 | #ifdef CONFIG_IPV6_PRIVACY | |
86 | #include <linux/random.h> | |
1da177e4 LT |
87 | #endif |
88 | ||
e21e8467 | 89 | #include <linux/uaccess.h> |
7f7d9a6b | 90 | #include <asm/unaligned.h> |
1da177e4 LT |
91 | |
92 | #include <linux/proc_fs.h> | |
93 | #include <linux/seq_file.h> | |
bc3b2d7f | 94 | #include <linux/export.h> |
1da177e4 LT |
95 | |
96 | /* Set to 3 to get tracing... */ | |
97 | #define ACONF_DEBUG 2 | |
98 | ||
99 | #if ACONF_DEBUG >= 3 | |
100 | #define ADBG(x) printk x | |
101 | #else | |
102 | #define ADBG(x) | |
103 | #endif | |
104 | ||
105 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e TG |
106 | |
107 | static inline u32 cstamp_delta(unsigned long cstamp) | |
108 | { | |
109 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
110 | } | |
1da177e4 | 111 | |
b2db7564 YH |
112 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1) |
113 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) | |
114 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) | |
115 | ||
1da177e4 | 116 | #ifdef CONFIG_SYSCTL |
f52295a9 | 117 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
118 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
119 | #else | |
120 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
121 | { | |
122 | } | |
123 | ||
124 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
125 | { | |
126 | } | |
1da177e4 LT |
127 | #endif |
128 | ||
129 | #ifdef CONFIG_IPV6_PRIVACY | |
130 | static int __ipv6_regen_rndid(struct inet6_dev *idev); | |
1ab1457c | 131 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
1da177e4 | 132 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 LT |
133 | #endif |
134 | ||
1b34be74 | 135 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
136 | static int ipv6_count_addresses(struct inet6_dev *idev); |
137 | ||
138 | /* | |
139 | * Configured unicast address hash table | |
140 | */ | |
c2e21293 | 141 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 142 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 143 | |
1da177e4 LT |
144 | static void addrconf_verify(unsigned long); |
145 | ||
8d06afab | 146 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
147 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
148 | ||
149 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
150 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
151 | ||
93d9b7d7 JP |
152 | static void addrconf_type_change(struct net_device *dev, |
153 | unsigned long event); | |
1da177e4 LT |
154 | static int addrconf_ifdown(struct net_device *dev, int how); |
155 | ||
cf22f9a2 | 156 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
1da177e4 LT |
157 | static void addrconf_dad_timer(unsigned long data); |
158 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 159 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
160 | static void addrconf_rs_timer(unsigned long data); |
161 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
162 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
163 | ||
1ab1457c | 164 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 165 | struct prefix_info *pinfo); |
3e81c6da DM |
166 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
167 | struct net_device *dev); | |
1da177e4 | 168 | |
e041c683 | 169 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 170 | |
888c848e | 171 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
172 | .forwarding = 0, |
173 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
174 | .mtu6 = IPV6_MIN_MTU, | |
175 | .accept_ra = 1, | |
176 | .accept_redirects = 1, | |
177 | .autoconf = 1, | |
178 | .force_mld_version = 0, | |
179 | .dad_transmits = 1, | |
180 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
181 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
182 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
183 | #ifdef CONFIG_IPV6_PRIVACY | |
184 | .use_tempaddr = 0, | |
185 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
186 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
187 | .regen_max_retry = REGEN_MAX_RETRY, | |
188 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
189 | #endif | |
190 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 191 | .accept_ra_defrtr = 1, |
c4fd30eb | 192 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
193 | #ifdef CONFIG_IPV6_ROUTER_PREF |
194 | .accept_ra_rtr_pref = 1, | |
52e16356 | 195 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
196 | #ifdef CONFIG_IPV6_ROUTE_INFO |
197 | .accept_ra_rt_info_max_plen = 0, | |
198 | #endif | |
930d6ff2 | 199 | #endif |
fbea49e1 | 200 | .proxy_ndp = 0, |
0bcbc926 | 201 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 202 | .disable_ipv6 = 0, |
1b34be74 | 203 | .accept_dad = 1, |
1da177e4 LT |
204 | }; |
205 | ||
ab32ea5d | 206 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
207 | .forwarding = 0, |
208 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
209 | .mtu6 = IPV6_MIN_MTU, | |
210 | .accept_ra = 1, | |
211 | .accept_redirects = 1, | |
212 | .autoconf = 1, | |
213 | .dad_transmits = 1, | |
214 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
215 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
216 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
217 | #ifdef CONFIG_IPV6_PRIVACY | |
218 | .use_tempaddr = 0, | |
219 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
220 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
221 | .regen_max_retry = REGEN_MAX_RETRY, | |
222 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
223 | #endif | |
224 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 225 | .accept_ra_defrtr = 1, |
c4fd30eb | 226 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
227 | #ifdef CONFIG_IPV6_ROUTER_PREF |
228 | .accept_ra_rtr_pref = 1, | |
52e16356 | 229 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
230 | #ifdef CONFIG_IPV6_ROUTE_INFO |
231 | .accept_ra_rt_info_max_plen = 0, | |
232 | #endif | |
930d6ff2 | 233 | #endif |
fbea49e1 | 234 | .proxy_ndp = 0, |
0bcbc926 | 235 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 236 | .disable_ipv6 = 0, |
1b34be74 | 237 | .accept_dad = 1, |
1da177e4 LT |
238 | }; |
239 | ||
240 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 241 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 242 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
243 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
244 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
1da177e4 | 245 | |
f24e3d65 | 246 | /* Check if a valid qdisc is available */ |
05297949 | 247 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 248 | { |
05297949 | 249 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
250 | } |
251 | ||
2b5ead46 YH |
252 | /* Check if a route is valid prefix route */ |
253 | static inline int addrconf_is_prefix_route(const struct rt6_info *rt) | |
254 | { | |
a02cec21 | 255 | return (rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0; |
2b5ead46 YH |
256 | } |
257 | ||
1da177e4 LT |
258 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
259 | { | |
260 | if (del_timer(&ifp->timer)) | |
261 | __in6_ifa_put(ifp); | |
262 | } | |
263 | ||
e21e8467 | 264 | enum addrconf_timer_t { |
1da177e4 LT |
265 | AC_NONE, |
266 | AC_DAD, | |
267 | AC_RS, | |
268 | }; | |
269 | ||
270 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
271 | enum addrconf_timer_t what, | |
272 | unsigned long when) | |
273 | { | |
274 | if (!del_timer(&ifp->timer)) | |
275 | in6_ifa_hold(ifp); | |
276 | ||
277 | switch (what) { | |
278 | case AC_DAD: | |
279 | ifp->timer.function = addrconf_dad_timer; | |
280 | break; | |
281 | case AC_RS: | |
282 | ifp->timer.function = addrconf_rs_timer; | |
283 | break; | |
e21e8467 SH |
284 | default: |
285 | break; | |
1da177e4 LT |
286 | } |
287 | ifp->timer.expires = jiffies + when; | |
288 | add_timer(&ifp->timer); | |
289 | } | |
290 | ||
7f7d9a6b HX |
291 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
292 | { | |
7d720c3e | 293 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
1823e4c8 ED |
294 | sizeof(struct ipstats_mib), |
295 | __alignof__(struct ipstats_mib)) < 0) | |
7f7d9a6b | 296 | goto err_ip; |
be281e55 ED |
297 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
298 | GFP_KERNEL); | |
299 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 300 | goto err_icmp; |
be281e55 ED |
301 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
302 | GFP_KERNEL); | |
303 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 304 | goto err_icmpmsg; |
7f7d9a6b HX |
305 | |
306 | return 0; | |
307 | ||
14878f75 | 308 | err_icmpmsg: |
be281e55 | 309 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 310 | err_icmp: |
7d720c3e | 311 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 312 | err_ip: |
aaf70ec7 | 313 | return -ENOMEM; |
7f7d9a6b HX |
314 | } |
315 | ||
16910b98 | 316 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 317 | { |
be281e55 ED |
318 | kfree(idev->stats.icmpv6msgdev); |
319 | kfree(idev->stats.icmpv6dev); | |
7d720c3e | 320 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b HX |
321 | } |
322 | ||
1da177e4 LT |
323 | /* Nobody refers to this device, we may destroy it. */ |
324 | ||
325 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
326 | { | |
327 | struct net_device *dev = idev->dev; | |
547b792c | 328 | |
502a2ffd | 329 | WARN_ON(!list_empty(&idev->addr_list)); |
547b792c IJ |
330 | WARN_ON(idev->mc_list != NULL); |
331 | ||
1da177e4 | 332 | #ifdef NET_REFCNT_DEBUG |
91df42be | 333 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); |
1da177e4 LT |
334 | #endif |
335 | dev_put(dev); | |
336 | if (!idev->dead) { | |
f3213831 | 337 | pr_warn("Freeing alive inet6 device %p\n", idev); |
1da177e4 LT |
338 | return; |
339 | } | |
340 | snmp6_free_dev(idev); | |
38f57d1a | 341 | kfree_rcu(idev, rcu); |
1da177e4 | 342 | } |
7159039a YH |
343 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
344 | ||
8e5e8f30 | 345 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
346 | { |
347 | struct inet6_dev *ndev; | |
348 | ||
349 | ASSERT_RTNL(); | |
350 | ||
351 | if (dev->mtu < IPV6_MIN_MTU) | |
352 | return NULL; | |
353 | ||
1ab1457c | 354 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 355 | |
1ab1457c YH |
356 | if (ndev == NULL) |
357 | return NULL; | |
322f74a4 IO |
358 | |
359 | rwlock_init(&ndev->lock); | |
360 | ndev->dev = dev; | |
502a2ffd | 361 | INIT_LIST_HEAD(&ndev->addr_list); |
362 | ||
c346dca1 | 363 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
364 | ndev->cnf.mtu6 = dev->mtu; |
365 | ndev->cnf.sysctl = NULL; | |
366 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
367 | if (ndev->nd_parms == NULL) { | |
368 | kfree(ndev); | |
369 | return NULL; | |
370 | } | |
0187bdfb BH |
371 | if (ndev->cnf.forwarding) |
372 | dev_disable_lro(dev); | |
322f74a4 IO |
373 | /* We refer to the device */ |
374 | dev_hold(dev); | |
1da177e4 | 375 | |
322f74a4 IO |
376 | if (snmp6_alloc_dev(ndev) < 0) { |
377 | ADBG((KERN_WARNING | |
f3213831 | 378 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
0dc47877 | 379 | __func__, dev->name)); |
322f74a4 | 380 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
381 | dev_put(dev); |
382 | kfree(ndev); | |
322f74a4 IO |
383 | return NULL; |
384 | } | |
1da177e4 | 385 | |
322f74a4 IO |
386 | if (snmp6_register_dev(ndev) < 0) { |
387 | ADBG((KERN_WARNING | |
f3213831 | 388 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
0dc47877 | 389 | __func__, dev->name)); |
322f74a4 IO |
390 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
391 | ndev->dead = 1; | |
392 | in6_dev_finish_destroy(ndev); | |
393 | return NULL; | |
394 | } | |
395 | ||
396 | /* One reference from device. We must do this before | |
397 | * we invoke __ipv6_regen_rndid(). | |
398 | */ | |
399 | in6_dev_hold(ndev); | |
1da177e4 | 400 | |
1b34be74 YH |
401 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
402 | ndev->cnf.accept_dad = -1; | |
403 | ||
b077d7ab YH |
404 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
405 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { | |
f3213831 | 406 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
407 | ndev->cnf.rtr_solicits = 0; |
408 | } | |
409 | #endif | |
410 | ||
1da177e4 | 411 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 412 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 413 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
414 | if ((dev->flags&IFF_LOOPBACK) || |
415 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 416 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 417 | dev->type == ARPHRD_SIT || |
0be669bb | 418 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
419 | ndev->cnf.use_tempaddr = -1; |
420 | } else { | |
421 | in6_dev_hold(ndev); | |
422 | ipv6_regen_rndid((unsigned long) ndev); | |
423 | } | |
1da177e4 LT |
424 | #endif |
425 | ||
f24e3d65 | 426 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
427 | ndev->if_flags |= IF_READY; |
428 | ||
322f74a4 IO |
429 | ipv6_mc_init_dev(ndev); |
430 | ndev->tstamp = jiffies; | |
f52295a9 | 431 | addrconf_sysctl_register(ndev); |
30c4cf57 | 432 | /* protected by rtnl_lock */ |
cf778b00 | 433 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc YH |
434 | |
435 | /* Join all-node multicast group */ | |
f3ee4010 | 436 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 437 | |
d6ddef9e | 438 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 439 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
440 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
441 | ||
1da177e4 LT |
442 | return ndev; |
443 | } | |
444 | ||
8e5e8f30 | 445 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
446 | { |
447 | struct inet6_dev *idev; | |
448 | ||
449 | ASSERT_RTNL(); | |
450 | ||
e21e8467 SH |
451 | idev = __in6_dev_get(dev); |
452 | if (!idev) { | |
453 | idev = ipv6_add_dev(dev); | |
454 | if (!idev) | |
1da177e4 LT |
455 | return NULL; |
456 | } | |
c5e33bdd | 457 | |
1da177e4 LT |
458 | if (dev->flags&IFF_UP) |
459 | ipv6_mc_up(idev); | |
460 | return idev; | |
461 | } | |
462 | ||
463 | #ifdef CONFIG_SYSCTL | |
464 | static void dev_forward_change(struct inet6_dev *idev) | |
465 | { | |
466 | struct net_device *dev; | |
467 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
468 | |
469 | if (!idev) | |
470 | return; | |
471 | dev = idev->dev; | |
0187bdfb BH |
472 | if (idev->cnf.forwarding) |
473 | dev_disable_lro(dev); | |
1da177e4 | 474 | if (dev && (dev->flags & IFF_MULTICAST)) { |
1da177e4 | 475 | if (idev->cnf.forwarding) |
f3ee4010 | 476 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 477 | else |
f3ee4010 | 478 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
1da177e4 | 479 | } |
502a2ffd | 480 | |
481 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
482 | if (ifa->flags&IFA_F_TENTATIVE) |
483 | continue; | |
1da177e4 LT |
484 | if (idev->cnf.forwarding) |
485 | addrconf_join_anycast(ifa); | |
486 | else | |
487 | addrconf_leave_anycast(ifa); | |
488 | } | |
489 | } | |
490 | ||
491 | ||
e186932b | 492 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
493 | { |
494 | struct net_device *dev; | |
495 | struct inet6_dev *idev; | |
496 | ||
c6d14c84 ED |
497 | rcu_read_lock(); |
498 | for_each_netdev_rcu(net, dev) { | |
1da177e4 LT |
499 | idev = __in6_dev_get(dev); |
500 | if (idev) { | |
e186932b PE |
501 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
502 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
503 | if (changed) |
504 | dev_forward_change(idev); | |
505 | } | |
1da177e4 | 506 | } |
c6d14c84 | 507 | rcu_read_unlock(); |
1da177e4 | 508 | } |
c8fecf22 | 509 | |
013d97e9 | 510 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 511 | { |
bff16c2f | 512 | struct net *net; |
013d97e9 FR |
513 | int old; |
514 | ||
515 | if (!rtnl_trylock()) | |
516 | return restart_syscall(); | |
bff16c2f PE |
517 | |
518 | net = (struct net *)table->extra2; | |
013d97e9 FR |
519 | old = *p; |
520 | *p = newf; | |
b325fddb | 521 | |
013d97e9 FR |
522 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
523 | rtnl_unlock(); | |
524 | return 0; | |
88af182e | 525 | } |
c8fecf22 | 526 | |
e186932b | 527 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
528 | net->ipv6.devconf_dflt->forwarding = newf; |
529 | addrconf_forward_change(net, newf); | |
013d97e9 | 530 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 531 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 532 | rtnl_unlock(); |
c8fecf22 | 533 | |
013d97e9 | 534 | if (newf) |
7b4da532 | 535 | rt6_purge_dflt_routers(net); |
b325fddb | 536 | return 1; |
c8fecf22 | 537 | } |
1da177e4 LT |
538 | #endif |
539 | ||
5c578aed | 540 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
541 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
542 | { | |
c2e21293 | 543 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 544 | |
1da177e4 | 545 | #ifdef NET_REFCNT_DEBUG |
91df42be | 546 | pr_debug("%s\n", __func__); |
1da177e4 LT |
547 | #endif |
548 | ||
549 | in6_dev_put(ifp->idev); | |
550 | ||
551 | if (del_timer(&ifp->timer)) | |
e21e8467 | 552 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 | 553 | |
e9d3e084 | 554 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 555 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
556 | return; |
557 | } | |
d8d1f30b | 558 | dst_release(&ifp->rt->dst); |
1da177e4 | 559 | |
e5785985 | 560 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
561 | } |
562 | ||
e55ffac6 BH |
563 | static void |
564 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
565 | { | |
502a2ffd | 566 | struct list_head *p; |
8a6ce0c0 | 567 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
568 | |
569 | /* | |
570 | * Each device address list is sorted in order of scope - | |
571 | * global before linklocal. | |
572 | */ | |
502a2ffd | 573 | list_for_each(p, &idev->addr_list) { |
574 | struct inet6_ifaddr *ifa | |
575 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 576 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
577 | break; |
578 | } | |
579 | ||
b54c9b98 | 580 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
581 | } |
582 | ||
ddbe5032 | 583 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 584 | { |
ddbe5032 | 585 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
586 | } |
587 | ||
1da177e4 LT |
588 | /* On success it returns ifp with increased reference count */ |
589 | ||
590 | static struct inet6_ifaddr * | |
591 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 592 | int scope, u32 flags) |
1da177e4 LT |
593 | { |
594 | struct inet6_ifaddr *ifa = NULL; | |
595 | struct rt6_info *rt; | |
3a88a81d | 596 | unsigned int hash; |
1da177e4 | 597 | int err = 0; |
d68b8270 YH |
598 | int addr_type = ipv6_addr_type(addr); |
599 | ||
600 | if (addr_type == IPV6_ADDR_ANY || | |
601 | addr_type & IPV6_ADDR_MULTICAST || | |
602 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
603 | addr_type & IPV6_ADDR_LOOPBACK)) | |
604 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 605 | |
8814c4b5 | 606 | rcu_read_lock_bh(); |
1da177e4 LT |
607 | if (idev->dead) { |
608 | err = -ENODEV; /*XXX*/ | |
609 | goto out2; | |
610 | } | |
611 | ||
56d417b1 | 612 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
613 | err = -EACCES; |
614 | goto out2; | |
615 | } | |
616 | ||
5c578aed | 617 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
618 | |
619 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 620 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
621 | ADBG(("ipv6_add_addr: already assigned\n")); |
622 | err = -EEXIST; | |
623 | goto out; | |
624 | } | |
625 | ||
322f74a4 | 626 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
627 | |
628 | if (ifa == NULL) { | |
629 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
630 | err = -ENOBUFS; | |
631 | goto out; | |
632 | } | |
633 | ||
8f031519 | 634 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
635 | if (IS_ERR(rt)) { |
636 | err = PTR_ERR(rt); | |
637 | goto out; | |
638 | } | |
639 | ||
4e3fd7a0 | 640 | ifa->addr = *addr; |
1da177e4 LT |
641 | |
642 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 643 | spin_lock_init(&ifa->state_lock); |
1da177e4 | 644 | init_timer(&ifa->timer); |
c2e21293 | 645 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
646 | ifa->timer.data = (unsigned long) ifa; |
647 | ifa->scope = scope; | |
648 | ifa->prefix_len = pfxlen; | |
649 | ifa->flags = flags | IFA_F_TENTATIVE; | |
650 | ifa->cstamp = ifa->tstamp = jiffies; | |
651 | ||
57f5f544 KF |
652 | ifa->rt = rt; |
653 | ||
1da177e4 LT |
654 | ifa->idev = idev; |
655 | in6_dev_hold(idev); | |
656 | /* For caller */ | |
657 | in6_ifa_hold(ifa); | |
658 | ||
659 | /* Add to big hash table */ | |
ddbe5032 | 660 | hash = inet6_addr_hash(addr); |
1da177e4 | 661 | |
5c578aed | 662 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 663 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
664 | |
665 | write_lock(&idev->lock); | |
666 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 667 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
668 | |
669 | #ifdef CONFIG_IPV6_PRIVACY | |
670 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 671 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
672 | in6_ifa_hold(ifa); |
673 | } | |
674 | #endif | |
675 | ||
1da177e4 LT |
676 | in6_ifa_hold(ifa); |
677 | write_unlock(&idev->lock); | |
678 | out2: | |
8814c4b5 | 679 | rcu_read_unlock_bh(); |
1da177e4 | 680 | |
fd92833a | 681 | if (likely(err == 0)) |
e041c683 | 682 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
683 | else { |
684 | kfree(ifa); | |
685 | ifa = ERR_PTR(err); | |
686 | } | |
687 | ||
688 | return ifa; | |
689 | out: | |
5c578aed | 690 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
691 | goto out2; |
692 | } | |
693 | ||
694 | /* This function wants to get referenced ifp and releases it before return */ | |
695 | ||
696 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
697 | { | |
502a2ffd | 698 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 699 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 700 | int state; |
1da177e4 LT |
701 | int deleted = 0, onlink = 0; |
702 | unsigned long expires = jiffies; | |
703 | ||
4c5ff6a6 HX |
704 | spin_lock_bh(&ifp->state_lock); |
705 | state = ifp->state; | |
e9d3e084 | 706 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
707 | spin_unlock_bh(&ifp->state_lock); |
708 | ||
709 | if (state == INET6_IFADDR_STATE_DEAD) | |
710 | goto out; | |
1da177e4 | 711 | |
5c578aed | 712 | spin_lock_bh(&addrconf_hash_lock); |
713 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 714 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
715 | |
716 | write_lock_bh(&idev->lock); | |
717 | #ifdef CONFIG_IPV6_PRIVACY | |
718 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 719 | list_del(&ifp->tmp_list); |
720 | if (ifp->ifpub) { | |
721 | in6_ifa_put(ifp->ifpub); | |
722 | ifp->ifpub = NULL; | |
1da177e4 | 723 | } |
372e6c8f | 724 | __in6_ifa_put(ifp); |
1da177e4 LT |
725 | } |
726 | #endif | |
727 | ||
502a2ffd | 728 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 729 | if (ifa == ifp) { |
502a2ffd | 730 | list_del_init(&ifp->if_list); |
1da177e4 | 731 | __in6_ifa_put(ifp); |
502a2ffd | 732 | |
1da177e4 LT |
733 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
734 | break; | |
735 | deleted = 1; | |
1d142804 | 736 | continue; |
1da177e4 LT |
737 | } else if (ifp->flags & IFA_F_PERMANENT) { |
738 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
739 | ifp->prefix_len)) { | |
740 | if (ifa->flags & IFA_F_PERMANENT) { | |
741 | onlink = 1; | |
742 | if (deleted) | |
743 | break; | |
744 | } else { | |
745 | unsigned long lifetime; | |
746 | ||
747 | if (!onlink) | |
748 | onlink = -1; | |
749 | ||
750 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
751 | |
752 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
753 | /* | |
754 | * Note: Because this address is | |
755 | * not permanent, lifetime < | |
756 | * LONG_MAX / HZ here. | |
757 | */ | |
1da177e4 LT |
758 | if (time_before(expires, |
759 | ifa->tstamp + lifetime * HZ)) | |
760 | expires = ifa->tstamp + lifetime * HZ; | |
761 | spin_unlock(&ifa->lock); | |
762 | } | |
763 | } | |
764 | } | |
765 | } | |
766 | write_unlock_bh(&idev->lock); | |
767 | ||
b2238566 AV |
768 | addrconf_del_timer(ifp); |
769 | ||
1da177e4 LT |
770 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
771 | ||
e041c683 | 772 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 773 | |
1da177e4 LT |
774 | /* |
775 | * Purge or update corresponding prefix | |
776 | * | |
777 | * 1) we don't purge prefix here if address was not permanent. | |
778 | * prefix is managed by its own lifetime. | |
779 | * 2) if there're no addresses, delete prefix. | |
780 | * 3) if there're still other permanent address(es), | |
781 | * corresponding prefix is still permanent. | |
782 | * 4) otherwise, update prefix lifetime to the | |
783 | * longest valid lifetime among the corresponding | |
784 | * addresses on the device. | |
785 | * Note: subsequent RA will update lifetime. | |
786 | * | |
787 | * --yoshfuji | |
788 | */ | |
789 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
790 | struct in6_addr prefix; | |
791 | struct rt6_info *rt; | |
c346dca1 | 792 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 793 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 794 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 795 | |
2b5ead46 | 796 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 797 | if (onlink == 0) { |
e0a1ad73 | 798 | ip6_del_rt(rt); |
1da177e4 LT |
799 | rt = NULL; |
800 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 801 | rt6_set_expires(rt, expires); |
1da177e4 LT |
802 | } |
803 | } | |
d8d1f30b | 804 | dst_release(&rt->dst); |
1da177e4 LT |
805 | } |
806 | ||
c3968a85 DW |
807 | /* clean up prefsrc entries */ |
808 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 809 | out: |
1da177e4 LT |
810 | in6_ifa_put(ifp); |
811 | } | |
812 | ||
813 | #ifdef CONFIG_IPV6_PRIVACY | |
814 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
815 | { | |
816 | struct inet6_dev *idev = ifp->idev; | |
817 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 818 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 819 | unsigned long regen_advance; |
1da177e4 LT |
820 | int tmp_plen; |
821 | int ret = 0; | |
822 | int max_addresses; | |
95c385b4 | 823 | u32 addr_flags; |
76f793e3 | 824 | unsigned long now = jiffies; |
1da177e4 LT |
825 | |
826 | write_lock(&idev->lock); | |
827 | if (ift) { | |
828 | spin_lock_bh(&ift->lock); | |
829 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
830 | spin_unlock_bh(&ift->lock); | |
831 | tmpaddr = &addr; | |
832 | } else { | |
833 | tmpaddr = NULL; | |
834 | } | |
835 | retry: | |
836 | in6_dev_hold(idev); | |
837 | if (idev->cnf.use_tempaddr <= 0) { | |
838 | write_unlock(&idev->lock); | |
f3213831 | 839 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
840 | in6_dev_put(idev); |
841 | ret = -1; | |
842 | goto out; | |
843 | } | |
844 | spin_lock_bh(&ifp->lock); | |
845 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
846 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
847 | spin_unlock_bh(&ifp->lock); | |
848 | write_unlock(&idev->lock); | |
f3213831 JP |
849 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
850 | __func__); | |
1da177e4 LT |
851 | in6_dev_put(idev); |
852 | ret = -1; | |
853 | goto out; | |
854 | } | |
855 | in6_ifa_hold(ifp); | |
856 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
857 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
858 | spin_unlock_bh(&ifp->lock); | |
859 | write_unlock(&idev->lock); | |
f3213831 JP |
860 | pr_warn("%s: regeneration of randomized interface id failed\n", |
861 | __func__); | |
1da177e4 LT |
862 | in6_ifa_put(ifp); |
863 | in6_dev_put(idev); | |
864 | ret = -1; | |
865 | goto out; | |
866 | } | |
867 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
76f793e3 | 868 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
869 | tmp_valid_lft = min_t(__u32, |
870 | ifp->valid_lft, | |
7a876b0e | 871 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
872 | tmp_prefered_lft = min_t(__u32, |
873 | ifp->prefered_lft, | |
7a876b0e | 874 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 875 | idev->cnf.max_desync_factor); |
1da177e4 LT |
876 | tmp_plen = ifp->prefix_len; |
877 | max_addresses = idev->cnf.max_addresses; | |
1da177e4 LT |
878 | tmp_tstamp = ifp->tstamp; |
879 | spin_unlock_bh(&ifp->lock); | |
880 | ||
eac55bf9 BB |
881 | regen_advance = idev->cnf.regen_max_retry * |
882 | idev->cnf.dad_transmits * | |
883 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 884 | write_unlock(&idev->lock); |
95c385b4 | 885 | |
eac55bf9 BB |
886 | /* A temporary address is created only if this calculated Preferred |
887 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
888 | * an implementation must not create a temporary address with a zero | |
889 | * Preferred Lifetime. | |
890 | */ | |
891 | if (tmp_prefered_lft <= regen_advance) { | |
892 | in6_ifa_put(ifp); | |
893 | in6_dev_put(idev); | |
894 | ret = -1; | |
895 | goto out; | |
896 | } | |
897 | ||
95c385b4 NH |
898 | addr_flags = IFA_F_TEMPORARY; |
899 | /* set in addrconf_prefix_rcv() */ | |
900 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
901 | addr_flags |= IFA_F_OPTIMISTIC; | |
902 | ||
1da177e4 | 903 | ift = !max_addresses || |
1ab1457c | 904 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 905 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
906 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
907 | addr_flags) : NULL; | |
1da177e4 LT |
908 | if (!ift || IS_ERR(ift)) { |
909 | in6_ifa_put(ifp); | |
910 | in6_dev_put(idev); | |
f3213831 | 911 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 LT |
912 | tmpaddr = &addr; |
913 | write_lock(&idev->lock); | |
914 | goto retry; | |
915 | } | |
916 | ||
917 | spin_lock_bh(&ift->lock); | |
918 | ift->ifpub = ifp; | |
919 | ift->valid_lft = tmp_valid_lft; | |
920 | ift->prefered_lft = tmp_prefered_lft; | |
76f793e3 | 921 | ift->cstamp = now; |
1da177e4 LT |
922 | ift->tstamp = tmp_tstamp; |
923 | spin_unlock_bh(&ift->lock); | |
924 | ||
cf22f9a2 | 925 | addrconf_dad_start(ift); |
1da177e4 LT |
926 | in6_ifa_put(ift); |
927 | in6_dev_put(idev); | |
928 | out: | |
929 | return ret; | |
930 | } | |
931 | #endif | |
932 | ||
933 | /* | |
072047e4 | 934 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 935 | */ |
a9b05723 YH |
936 | enum { |
937 | IPV6_SADDR_RULE_INIT = 0, | |
938 | IPV6_SADDR_RULE_LOCAL, | |
939 | IPV6_SADDR_RULE_SCOPE, | |
940 | IPV6_SADDR_RULE_PREFERRED, | |
941 | #ifdef CONFIG_IPV6_MIP6 | |
942 | IPV6_SADDR_RULE_HOA, | |
943 | #endif | |
944 | IPV6_SADDR_RULE_OIF, | |
945 | IPV6_SADDR_RULE_LABEL, | |
946 | #ifdef CONFIG_IPV6_PRIVACY | |
947 | IPV6_SADDR_RULE_PRIVACY, | |
948 | #endif | |
949 | IPV6_SADDR_RULE_ORCHID, | |
950 | IPV6_SADDR_RULE_PREFIX, | |
951 | IPV6_SADDR_RULE_MAX | |
952 | }; | |
953 | ||
072047e4 | 954 | struct ipv6_saddr_score { |
a9b05723 YH |
955 | int rule; |
956 | int addr_type; | |
957 | struct inet6_ifaddr *ifa; | |
958 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
959 | int scopedist; | |
960 | int matchlen; | |
072047e4 YH |
961 | }; |
962 | ||
a9b05723 | 963 | struct ipv6_saddr_dst { |
9acd9f3a | 964 | const struct in6_addr *addr; |
a9b05723 YH |
965 | int ifindex; |
966 | int scope; | |
967 | int label; | |
7cbca67c | 968 | unsigned int prefs; |
a9b05723 | 969 | }; |
072047e4 | 970 | |
b6f99a21 | 971 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 972 | { |
45bb0060 | 973 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
974 | return 1; |
975 | return 0; | |
1da177e4 LT |
976 | } |
977 | ||
3de23255 BT |
978 | static int ipv6_get_saddr_eval(struct net *net, |
979 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
980 | struct ipv6_saddr_dst *dst, |
981 | int i) | |
982 | { | |
983 | int ret; | |
984 | ||
985 | if (i <= score->rule) { | |
986 | switch (i) { | |
987 | case IPV6_SADDR_RULE_SCOPE: | |
988 | ret = score->scopedist; | |
989 | break; | |
990 | case IPV6_SADDR_RULE_PREFIX: | |
991 | ret = score->matchlen; | |
992 | break; | |
993 | default: | |
994 | ret = !!test_bit(i, score->scorebits); | |
995 | } | |
996 | goto out; | |
997 | } | |
998 | ||
999 | switch (i) { | |
1000 | case IPV6_SADDR_RULE_INIT: | |
1001 | /* Rule 0: remember if hiscore is not ready yet */ | |
1002 | ret = !!score->ifa; | |
1003 | break; | |
1004 | case IPV6_SADDR_RULE_LOCAL: | |
1005 | /* Rule 1: Prefer same address */ | |
1006 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1007 | break; | |
1008 | case IPV6_SADDR_RULE_SCOPE: | |
1009 | /* Rule 2: Prefer appropriate scope | |
1010 | * | |
1011 | * ret | |
1012 | * ^ | |
1013 | * -1 | d 15 | |
1014 | * ---+--+-+---> scope | |
1015 | * | | |
1016 | * | d is scope of the destination. | |
1017 | * B-d | \ | |
1018 | * | \ <- smaller scope is better if | |
1019 | * B-15 | \ if scope is enough for destinaion. | |
1020 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1021 | * d-C-1 | / | |
1022 | * |/ <- greater is better | |
1023 | * -C / if scope is not enough for destination. | |
1024 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1025 | * | |
1026 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1027 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1028 | * Assume B = 0 and we get C > 29. | |
1029 | */ | |
1030 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1031 | if (ret >= dst->scope) | |
1032 | ret = -ret; | |
1033 | else | |
1034 | ret -= 128; /* 30 is enough */ | |
1035 | score->scopedist = ret; | |
1036 | break; | |
1037 | case IPV6_SADDR_RULE_PREFERRED: | |
1038 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1039 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1040 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1041 | break; | |
1042 | #ifdef CONFIG_IPV6_MIP6 | |
1043 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1044 | { |
a9b05723 | 1045 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1046 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1047 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1048 | break; |
7cbca67c | 1049 | } |
a9b05723 YH |
1050 | #endif |
1051 | case IPV6_SADDR_RULE_OIF: | |
1052 | /* Rule 5: Prefer outgoing interface */ | |
1053 | ret = (!dst->ifindex || | |
1054 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1055 | break; | |
1056 | case IPV6_SADDR_RULE_LABEL: | |
1057 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1058 | ret = ipv6_addr_label(net, |
1059 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1060 | score->ifa->idev->dev->ifindex) == dst->label; |
1061 | break; | |
1062 | #ifdef CONFIG_IPV6_PRIVACY | |
1063 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1064 | { |
a9b05723 | 1065 | /* Rule 7: Prefer public address |
25985edc | 1066 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1067 | */ |
7cbca67c YH |
1068 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1069 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1070 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1071 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1072 | break; |
7cbca67c | 1073 | } |
a9b05723 YH |
1074 | #endif |
1075 | case IPV6_SADDR_RULE_ORCHID: | |
1076 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1077 | * non-ORCHID vs non-ORCHID | |
1078 | */ | |
1079 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1080 | ipv6_addr_orchid(dst->addr)); | |
1081 | break; | |
1082 | case IPV6_SADDR_RULE_PREFIX: | |
1083 | /* Rule 8: Use longest matching prefix */ | |
1084 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1085 | dst->addr); | |
1086 | break; | |
1087 | default: | |
1088 | ret = 0; | |
1089 | } | |
1090 | ||
1091 | if (ret) | |
1092 | __set_bit(i, score->scorebits); | |
1093 | score->rule = i; | |
1094 | out: | |
1095 | return ret; | |
1096 | } | |
1097 | ||
191cd582 | 1098 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1099 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1100 | struct in6_addr *saddr) |
1da177e4 | 1101 | { |
a9b05723 YH |
1102 | struct ipv6_saddr_score scores[2], |
1103 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1104 | struct ipv6_saddr_dst dst; |
072047e4 | 1105 | struct net_device *dev; |
a9b05723 | 1106 | int dst_type; |
1da177e4 | 1107 | |
a9b05723 YH |
1108 | dst_type = __ipv6_addr_type(daddr); |
1109 | dst.addr = daddr; | |
1110 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1111 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1112 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1113 | dst.prefs = prefs; |
a9b05723 YH |
1114 | |
1115 | hiscore->rule = -1; | |
1116 | hiscore->ifa = NULL; | |
1da177e4 | 1117 | |
8814c4b5 | 1118 | rcu_read_lock(); |
1da177e4 | 1119 | |
c6d14c84 | 1120 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1121 | struct inet6_dev *idev; |
072047e4 | 1122 | |
a9b05723 | 1123 | /* Candidate Source Address (section 4) |
072047e4 YH |
1124 | * - multicast and link-local destination address, |
1125 | * the set of candidate source address MUST only | |
1126 | * include addresses assigned to interfaces | |
1127 | * belonging to the same link as the outgoing | |
1128 | * interface. | |
1129 | * (- For site-local destination addresses, the | |
1130 | * set of candidate source addresses MUST only | |
1131 | * include addresses assigned to interfaces | |
1132 | * belonging to the same site as the outgoing | |
1133 | * interface.) | |
1134 | */ | |
a9b05723 YH |
1135 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1136 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1137 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1138 | continue; |
1da177e4 | 1139 | |
1da177e4 | 1140 | idev = __in6_dev_get(dev); |
072047e4 YH |
1141 | if (!idev) |
1142 | continue; | |
1143 | ||
1144 | read_lock_bh(&idev->lock); | |
502a2ffd | 1145 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1146 | int i; |
072047e4 | 1147 | |
a9b05723 | 1148 | /* |
6b3ae80a YH |
1149 | * - Tentative Address (RFC2462 section 5.4) |
1150 | * - A tentative address is not considered | |
1151 | * "assigned to an interface" in the traditional | |
95c385b4 | 1152 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1153 | * - Candidate Source Address (section 4) |
072047e4 YH |
1154 | * - In any case, anycast addresses, multicast |
1155 | * addresses, and the unspecified address MUST | |
1156 | * NOT be included in a candidate set. | |
1157 | */ | |
a9b05723 YH |
1158 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1159 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1160 | continue; |
a9b05723 YH |
1161 | |
1162 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1163 | ||
1164 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1165 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1166 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1167 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1168 | "assigned as unicast address on %s", |
1169 | dev->name); | |
1170 | continue; | |
1171 | } | |
1172 | ||
a9b05723 YH |
1173 | score->rule = -1; |
1174 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1175 | ||
1176 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1177 | int minihiscore, miniscore; | |
1178 | ||
3de23255 BT |
1179 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1180 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1181 | |
1182 | if (minihiscore > miniscore) { | |
1183 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1184 | score->scopedist > 0) { | |
1185 | /* | |
1186 | * special case: | |
1187 | * each remaining entry | |
1188 | * has too small (not enough) | |
1189 | * scope, because ifa entries | |
1190 | * are sorted by their scope | |
1191 | * values. | |
1192 | */ | |
1193 | goto try_nextdev; | |
1194 | } | |
1195 | break; | |
1196 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1197 | if (hiscore->ifa) |
1198 | in6_ifa_put(hiscore->ifa); | |
1199 | ||
1200 | in6_ifa_hold(score->ifa); | |
1201 | ||
a0bffffc | 1202 | swap(hiscore, score); |
a9b05723 YH |
1203 | |
1204 | /* restore our iterator */ | |
1205 | score->ifa = hiscore->ifa; | |
1206 | ||
1207 | break; | |
1da177e4 | 1208 | } |
072047e4 | 1209 | } |
1da177e4 | 1210 | } |
a9b05723 | 1211 | try_nextdev: |
072047e4 | 1212 | read_unlock_bh(&idev->lock); |
1da177e4 | 1213 | } |
8814c4b5 | 1214 | rcu_read_unlock(); |
1da177e4 | 1215 | |
a9b05723 | 1216 | if (!hiscore->ifa) |
072047e4 | 1217 | return -EADDRNOTAVAIL; |
1ab1457c | 1218 | |
4e3fd7a0 | 1219 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1220 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1221 | return 0; |
1da177e4 | 1222 | } |
5e5f3f0f | 1223 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1224 | |
95c385b4 NH |
1225 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1226 | unsigned char banned_flags) | |
1da177e4 LT |
1227 | { |
1228 | struct inet6_dev *idev; | |
1229 | int err = -EADDRNOTAVAIL; | |
1230 | ||
8814c4b5 | 1231 | rcu_read_lock(); |
e21e8467 SH |
1232 | idev = __in6_dev_get(dev); |
1233 | if (idev) { | |
1da177e4 LT |
1234 | struct inet6_ifaddr *ifp; |
1235 | ||
1236 | read_lock_bh(&idev->lock); | |
502a2ffd | 1237 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1238 | if (ifp->scope == IFA_LINK && | |
1239 | !(ifp->flags & banned_flags)) { | |
4e3fd7a0 | 1240 | *addr = ifp->addr; |
1da177e4 LT |
1241 | err = 0; |
1242 | break; | |
1243 | } | |
1244 | } | |
1245 | read_unlock_bh(&idev->lock); | |
1246 | } | |
8814c4b5 | 1247 | rcu_read_unlock(); |
1da177e4 LT |
1248 | return err; |
1249 | } | |
1250 | ||
1251 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1252 | { | |
1253 | int cnt = 0; | |
1254 | struct inet6_ifaddr *ifp; | |
1255 | ||
1256 | read_lock_bh(&idev->lock); | |
502a2ffd | 1257 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1258 | cnt++; |
1259 | read_unlock_bh(&idev->lock); | |
1260 | return cnt; | |
1261 | } | |
1262 | ||
b71d1d42 | 1263 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
bfeade08 | 1264 | struct net_device *dev, int strict) |
1da177e4 | 1265 | { |
eedf042a | 1266 | struct inet6_ifaddr *ifp; |
c2e21293 | 1267 | struct hlist_node *node; |
ddbe5032 | 1268 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1269 | |
5c578aed | 1270 | rcu_read_lock_bh(); |
1271 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1272 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1273 | continue; |
1da177e4 | 1274 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1275 | !(ifp->flags&IFA_F_TENTATIVE) && |
1276 | (dev == NULL || ifp->idev->dev == dev || | |
1277 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1278 | rcu_read_unlock_bh(); | |
1279 | return 1; | |
1da177e4 LT |
1280 | } |
1281 | } | |
5c578aed | 1282 | |
eedf042a SH |
1283 | rcu_read_unlock_bh(); |
1284 | return 0; | |
1da177e4 | 1285 | } |
7159039a YH |
1286 | EXPORT_SYMBOL(ipv6_chk_addr); |
1287 | ||
3e81c6da DM |
1288 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1289 | struct net_device *dev) | |
1da177e4 | 1290 | { |
ddbe5032 | 1291 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1292 | struct inet6_ifaddr *ifp; |
1293 | struct hlist_node *node; | |
1da177e4 | 1294 | |
c2e21293 | 1295 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1296 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1297 | continue; |
1da177e4 LT |
1298 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1299 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1300 | return true; |
1da177e4 LT |
1301 | } |
1302 | } | |
3e81c6da | 1303 | return false; |
1da177e4 LT |
1304 | } |
1305 | ||
b71d1d42 | 1306 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1307 | { |
1308 | struct inet6_dev *idev; | |
1309 | struct inet6_ifaddr *ifa; | |
1310 | int onlink; | |
1311 | ||
1312 | onlink = 0; | |
1313 | rcu_read_lock(); | |
1314 | idev = __in6_dev_get(dev); | |
1315 | if (idev) { | |
1316 | read_lock_bh(&idev->lock); | |
502a2ffd | 1317 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1318 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1319 | ifa->prefix_len); | |
1320 | if (onlink) | |
1321 | break; | |
1322 | } | |
1323 | read_unlock_bh(&idev->lock); | |
1324 | } | |
1325 | rcu_read_unlock(); | |
1326 | return onlink; | |
1327 | } | |
52eeeb84 YH |
1328 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1329 | ||
9acd9f3a | 1330 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1331 | struct net_device *dev, int strict) |
1da177e4 | 1332 | { |
b79d1d54 | 1333 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1334 | unsigned int hash = inet6_addr_hash(addr); |
b79d1d54 | 1335 | struct hlist_node *node; |
1da177e4 | 1336 | |
5c578aed | 1337 | rcu_read_lock_bh(); |
4f70ecca | 1338 | hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1339 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1340 | continue; |
1da177e4 LT |
1341 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1342 | if (dev == NULL || ifp->idev->dev == dev || | |
1343 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1344 | result = ifp; |
1da177e4 LT |
1345 | in6_ifa_hold(ifp); |
1346 | break; | |
1347 | } | |
1348 | } | |
1349 | } | |
5c578aed | 1350 | rcu_read_unlock_bh(); |
1da177e4 | 1351 | |
b79d1d54 | 1352 | return result; |
1da177e4 LT |
1353 | } |
1354 | ||
1da177e4 LT |
1355 | /* Gets referenced address, destroys ifaddr */ |
1356 | ||
cc411d0b | 1357 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1358 | { |
1da177e4 LT |
1359 | if (ifp->flags&IFA_F_PERMANENT) { |
1360 | spin_lock_bh(&ifp->lock); | |
1361 | addrconf_del_timer(ifp); | |
1362 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1363 | if (dad_failed) |
1364 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1365 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1366 | if (dad_failed) |
1367 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1368 | in6_ifa_put(ifp); |
1369 | #ifdef CONFIG_IPV6_PRIVACY | |
1370 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1371 | struct inet6_ifaddr *ifpub; | |
1372 | spin_lock_bh(&ifp->lock); | |
1373 | ifpub = ifp->ifpub; | |
1374 | if (ifpub) { | |
1375 | in6_ifa_hold(ifpub); | |
1376 | spin_unlock_bh(&ifp->lock); | |
1377 | ipv6_create_tempaddr(ifpub, ifp); | |
1378 | in6_ifa_put(ifpub); | |
1379 | } else { | |
1380 | spin_unlock_bh(&ifp->lock); | |
1381 | } | |
1382 | ipv6_del_addr(ifp); | |
1383 | #endif | |
1384 | } else | |
1385 | ipv6_del_addr(ifp); | |
1386 | } | |
1387 | ||
f2344a13 HX |
1388 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1389 | { | |
1390 | int err = -ENOENT; | |
1391 | ||
1392 | spin_lock(&ifp->state_lock); | |
1393 | if (ifp->state == INET6_IFADDR_STATE_DAD) { | |
1394 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1395 | err = 0; | |
1396 | } | |
1397 | spin_unlock(&ifp->state_lock); | |
1398 | ||
1399 | return err; | |
1400 | } | |
1401 | ||
3c21edbd YH |
1402 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1403 | { | |
1b34be74 | 1404 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1405 | |
853dc2e0 UB |
1406 | if (addrconf_dad_end(ifp)) { |
1407 | in6_ifa_put(ifp); | |
f2344a13 | 1408 | return; |
853dc2e0 | 1409 | } |
f2344a13 | 1410 | |
e87cc472 JP |
1411 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1412 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1413 | |
1b34be74 YH |
1414 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1415 | struct in6_addr addr; | |
1416 | ||
1417 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1418 | addr.s6_addr32[1] = 0; | |
1419 | ||
1420 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1421 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1422 | /* DAD failed for link-local based on MAC address */ | |
1423 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1424 | |
f3213831 | 1425 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1426 | ifp->idev->dev->name); |
1b34be74 YH |
1427 | } |
1428 | } | |
1429 | ||
cc411d0b | 1430 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1431 | } |
1da177e4 LT |
1432 | |
1433 | /* Join to solicited addr multicast group. */ | |
1434 | ||
b71d1d42 | 1435 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1436 | { |
1437 | struct in6_addr maddr; | |
1438 | ||
1439 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1440 | return; | |
1441 | ||
1442 | addrconf_addr_solict_mult(addr, &maddr); | |
1443 | ipv6_dev_mc_inc(dev, &maddr); | |
1444 | } | |
1445 | ||
b71d1d42 | 1446 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1447 | { |
1448 | struct in6_addr maddr; | |
1449 | ||
1450 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1451 | return; | |
1452 | ||
1453 | addrconf_addr_solict_mult(addr, &maddr); | |
1454 | __ipv6_dev_mc_dec(idev, &maddr); | |
1455 | } | |
1456 | ||
20380731 | 1457 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1458 | { |
1459 | struct in6_addr addr; | |
2bda8a0c BM |
1460 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1461 | return; | |
1da177e4 LT |
1462 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1463 | if (ipv6_addr_any(&addr)) | |
1464 | return; | |
1465 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1466 | } | |
1467 | ||
20380731 | 1468 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1469 | { |
1470 | struct in6_addr addr; | |
32019e65 YH |
1471 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1472 | return; | |
1da177e4 LT |
1473 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1474 | if (ipv6_addr_any(&addr)) | |
1475 | return; | |
1476 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1477 | } | |
1478 | ||
073a8e0e YH |
1479 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1480 | { | |
1481 | if (dev->addr_len != ETH_ALEN) | |
1482 | return -1; | |
1483 | memcpy(eui, dev->dev_addr, 3); | |
1484 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1485 | ||
1486 | /* | |
1487 | * The zSeries OSA network cards can be shared among various | |
1488 | * OS instances, but the OSA cards have only one MAC address. | |
1489 | * This leads to duplicate address conflicts in conjunction | |
1490 | * with IPv6 if more than one instance uses the same card. | |
1491 | * | |
1492 | * The driver for these cards can deliver a unique 16-bit | |
1493 | * identifier for each instance sharing the same card. It is | |
1494 | * placed instead of 0xFFFE in the interface identifier. The | |
1495 | * "u" bit of the interface identifier is not inverted in this | |
1496 | * case. Hence the resulting interface identifier has local | |
1497 | * scope according to RFC2373. | |
1498 | */ | |
1499 | if (dev->dev_id) { | |
1500 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1501 | eui[4] = dev->dev_id & 0xFF; | |
1502 | } else { | |
1503 | eui[3] = 0xFF; | |
1504 | eui[4] = 0xFE; | |
1505 | eui[0] ^= 2; | |
1506 | } | |
1507 | return 0; | |
1508 | } | |
1509 | ||
06a4c1c5 | 1510 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1511 | { | |
1512 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1513 | return -1; | |
1514 | memcpy(eui, dev->dev_addr, 8); | |
1515 | return 0; | |
1516 | } | |
1517 | ||
073a8e0e YH |
1518 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1519 | { | |
1520 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1521 | if (dev->addr_len != ARCNET_ALEN) | |
1522 | return -1; | |
1523 | memset(eui, 0, 7); | |
8e5e8f30 | 1524 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1525 | return 0; |
1526 | } | |
1527 | ||
1528 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1529 | { | |
1530 | if (dev->addr_len != INFINIBAND_ALEN) | |
1531 | return -1; | |
1532 | memcpy(eui, dev->dev_addr + 12, 8); | |
1533 | eui[0] |= 2; | |
1534 | return 0; | |
1535 | } | |
1536 | ||
c61393ea | 1537 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1538 | { |
9af28511 SH |
1539 | if (addr == 0) |
1540 | return -1; | |
dfd982ba YH |
1541 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1542 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1543 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1544 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1545 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1546 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1547 | eui[1] = 0; | |
1548 | eui[2] = 0x5E; | |
1549 | eui[3] = 0xFE; | |
1550 | memcpy(eui + 4, &addr, 4); | |
1551 | return 0; | |
1552 | } | |
dfd982ba YH |
1553 | |
1554 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1555 | { | |
1556 | if (dev->priv_flags & IFF_ISATAP) | |
1557 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1558 | return -1; | |
1559 | } | |
1560 | ||
aee80b54 | 1561 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1562 | { | |
1563 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1564 | } | |
1565 | ||
1da177e4 LT |
1566 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1567 | { | |
1568 | switch (dev->type) { | |
1569 | case ARPHRD_ETHER: | |
1570 | case ARPHRD_FDDI: | |
073a8e0e | 1571 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1572 | case ARPHRD_ARCNET: |
073a8e0e | 1573 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1574 | case ARPHRD_INFINIBAND: |
073a8e0e | 1575 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1576 | case ARPHRD_SIT: |
dfd982ba | 1577 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1578 | case ARPHRD_IPGRE: |
1579 | return addrconf_ifid_gre(eui, dev); | |
06a4c1c5 | 1580 | case ARPHRD_IEEE802154: |
1581 | return addrconf_ifid_eui64(eui, dev); | |
1da177e4 LT |
1582 | } |
1583 | return -1; | |
1584 | } | |
1585 | ||
1586 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1587 | { | |
1588 | int err = -1; | |
1589 | struct inet6_ifaddr *ifp; | |
1590 | ||
1591 | read_lock_bh(&idev->lock); | |
502a2ffd | 1592 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1593 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1594 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1595 | err = 0; | |
1596 | break; | |
1597 | } | |
1598 | } | |
1599 | read_unlock_bh(&idev->lock); | |
1600 | return err; | |
1601 | } | |
1602 | ||
1603 | #ifdef CONFIG_IPV6_PRIVACY | |
1604 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1605 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1606 | { | |
1da177e4 | 1607 | regen: |
955189ef | 1608 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1609 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1610 | |
1611 | /* | |
1612 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1613 | * check if generated address is not inappropriate | |
1614 | * | |
1615 | * - Reserved subnet anycast (RFC 2526) | |
1616 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1617 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1618 | * 00-00-5E-FE-xx-xx-xx-xx |
1619 | * - value 0 | |
1620 | * - XXX: already assigned to an address on the device | |
1621 | */ | |
1ab1457c | 1622 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1623 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1624 | (idev->rndid[7]&0x80)) | |
1625 | goto regen; | |
1626 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1627 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1628 | goto regen; | |
1629 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1630 | goto regen; | |
1631 | } | |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | static void ipv6_regen_rndid(unsigned long data) | |
1637 | { | |
1638 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1639 | unsigned long expires; | |
1640 | ||
8814c4b5 | 1641 | rcu_read_lock_bh(); |
1da177e4 LT |
1642 | write_lock_bh(&idev->lock); |
1643 | ||
1644 | if (idev->dead) | |
1645 | goto out; | |
1646 | ||
1647 | if (__ipv6_regen_rndid(idev) < 0) | |
1648 | goto out; | |
1ab1457c | 1649 | |
1da177e4 | 1650 | expires = jiffies + |
1ab1457c | 1651 | idev->cnf.temp_prefered_lft * HZ - |
784e2710 BH |
1652 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
1653 | idev->cnf.max_desync_factor * HZ; | |
1da177e4 | 1654 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1655 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1656 | __func__, idev->dev->name); | |
1da177e4 LT |
1657 | goto out; |
1658 | } | |
1659 | ||
1660 | if (!mod_timer(&idev->regen_timer, expires)) | |
1661 | in6_dev_hold(idev); | |
1662 | ||
1663 | out: | |
1664 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1665 | rcu_read_unlock_bh(); |
1da177e4 LT |
1666 | in6_dev_put(idev); |
1667 | } | |
1668 | ||
8e5e8f30 EZ |
1669 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
1670 | { | |
1da177e4 LT |
1671 | int ret = 0; |
1672 | ||
1673 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1674 | ret = __ipv6_regen_rndid(idev); | |
1675 | return ret; | |
1676 | } | |
1677 | #endif | |
1678 | ||
1679 | /* | |
1680 | * Add prefix route. | |
1681 | */ | |
1682 | ||
1683 | static void | |
1684 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1685 | unsigned long expires, u32 flags) |
1da177e4 | 1686 | { |
86872cb5 TG |
1687 | struct fib6_config cfg = { |
1688 | .fc_table = RT6_TABLE_PREFIX, | |
1689 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1690 | .fc_ifindex = dev->ifindex, | |
1691 | .fc_expires = expires, | |
1692 | .fc_dst_len = plen, | |
1693 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1694 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1695 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1696 | }; |
1da177e4 | 1697 | |
4e3fd7a0 | 1698 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1699 | |
1700 | /* Prevent useless cloning on PtP SIT. | |
1701 | This thing is done here expecting that the whole | |
1702 | class of non-broadcast devices need not cloning. | |
1703 | */ | |
0be669bb | 1704 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1705 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1706 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1707 | #endif |
1da177e4 | 1708 | |
86872cb5 | 1709 | ip6_route_add(&cfg); |
1da177e4 LT |
1710 | } |
1711 | ||
14ef37b6 AH |
1712 | |
1713 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
1714 | int plen, | |
1715 | const struct net_device *dev, | |
1716 | u32 flags, u32 noflags) | |
1717 | { | |
1718 | struct fib6_node *fn; | |
1719 | struct rt6_info *rt = NULL; | |
1720 | struct fib6_table *table; | |
1721 | ||
1722 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
1723 | if (table == NULL) | |
1724 | return NULL; | |
1725 | ||
1726 | write_lock_bh(&table->tb6_lock); | |
1727 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); | |
1728 | if (!fn) | |
1729 | goto out; | |
1730 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 1731 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
1732 | continue; |
1733 | if ((rt->rt6i_flags & flags) != flags) | |
1734 | continue; | |
1735 | if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0)) | |
1736 | continue; | |
1737 | dst_hold(&rt->dst); | |
1738 | break; | |
1739 | } | |
1740 | out: | |
1741 | write_unlock_bh(&table->tb6_lock); | |
1742 | return rt; | |
1743 | } | |
1744 | ||
1745 | ||
1da177e4 LT |
1746 | /* Create "default" multicast route to the interface */ |
1747 | ||
1748 | static void addrconf_add_mroute(struct net_device *dev) | |
1749 | { | |
86872cb5 TG |
1750 | struct fib6_config cfg = { |
1751 | .fc_table = RT6_TABLE_LOCAL, | |
1752 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1753 | .fc_ifindex = dev->ifindex, | |
1754 | .fc_dst_len = 8, | |
1755 | .fc_flags = RTF_UP, | |
c346dca1 | 1756 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1757 | }; |
1758 | ||
1759 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1760 | ||
1761 | ip6_route_add(&cfg); | |
1da177e4 LT |
1762 | } |
1763 | ||
0be669bb | 1764 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1765 | static void sit_route_add(struct net_device *dev) |
1766 | { | |
86872cb5 TG |
1767 | struct fib6_config cfg = { |
1768 | .fc_table = RT6_TABLE_MAIN, | |
1769 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1770 | .fc_ifindex = dev->ifindex, | |
1771 | .fc_dst_len = 96, | |
1772 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1773 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1774 | }; |
1da177e4 LT |
1775 | |
1776 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1777 | ip6_route_add(&cfg); |
1da177e4 | 1778 | } |
0be669bb | 1779 | #endif |
1da177e4 LT |
1780 | |
1781 | static void addrconf_add_lroute(struct net_device *dev) | |
1782 | { | |
1783 | struct in6_addr addr; | |
1784 | ||
1785 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1786 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1787 | } | |
1788 | ||
1789 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1790 | { | |
1791 | struct inet6_dev *idev; | |
1792 | ||
1793 | ASSERT_RTNL(); | |
1794 | ||
e21e8467 SH |
1795 | idev = ipv6_find_idev(dev); |
1796 | if (!idev) | |
64e724f6 BH |
1797 | return ERR_PTR(-ENOBUFS); |
1798 | ||
1799 | if (idev->cnf.disable_ipv6) | |
1800 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
1801 | |
1802 | /* Add default multicast route */ | |
4af04aba LW |
1803 | if (!(dev->flags & IFF_LOOPBACK)) |
1804 | addrconf_add_mroute(dev); | |
1da177e4 LT |
1805 | |
1806 | /* Add link local route */ | |
1807 | addrconf_add_lroute(dev); | |
1808 | return idev; | |
1809 | } | |
1810 | ||
e6bff995 | 1811 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
1812 | { |
1813 | struct prefix_info *pinfo; | |
1814 | __u32 valid_lft; | |
1815 | __u32 prefered_lft; | |
1816 | int addr_type; | |
1da177e4 | 1817 | struct inet6_dev *in6_dev; |
56d417b1 | 1818 | struct net *net = dev_net(dev); |
1da177e4 LT |
1819 | |
1820 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1821 | |
1da177e4 LT |
1822 | if (len < sizeof(struct prefix_info)) { |
1823 | ADBG(("addrconf: prefix option too short\n")); | |
1824 | return; | |
1825 | } | |
1ab1457c | 1826 | |
1da177e4 LT |
1827 | /* |
1828 | * Validation checks ([ADDRCONF], page 19) | |
1829 | */ | |
1830 | ||
1831 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1832 | ||
1833 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1834 | return; | |
1835 | ||
1836 | valid_lft = ntohl(pinfo->valid); | |
1837 | prefered_lft = ntohl(pinfo->prefered); | |
1838 | ||
1839 | if (prefered_lft > valid_lft) { | |
e87cc472 | 1840 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
1841 | return; |
1842 | } | |
1843 | ||
1844 | in6_dev = in6_dev_get(dev); | |
1845 | ||
1846 | if (in6_dev == NULL) { | |
e87cc472 JP |
1847 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
1848 | dev->name); | |
1da177e4 LT |
1849 | return; |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * Two things going on here: | |
1854 | * 1) Add routes for on-link prefixes | |
1855 | * 2) Configure prefixes with the auto flag set | |
1856 | */ | |
1857 | ||
4bed72e4 YH |
1858 | if (pinfo->onlink) { |
1859 | struct rt6_info *rt; | |
1860 | unsigned long rt_expires; | |
1861 | ||
6f704992 YH |
1862 | /* Avoid arithmetic overflow. Really, we could |
1863 | * save rt_expires in seconds, likely valid_lft, | |
1864 | * but it would require division in fib gc, that it | |
1865 | * not good. | |
1866 | */ | |
4bed72e4 YH |
1867 | if (HZ > USER_HZ) |
1868 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1869 | else | |
1870 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1871 | |
4bed72e4 YH |
1872 | if (addrconf_finite_timeout(rt_expires)) |
1873 | rt_expires *= HZ; | |
1da177e4 | 1874 | |
14ef37b6 AH |
1875 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
1876 | pinfo->prefix_len, | |
1877 | dev, | |
1878 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
1879 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 1880 | |
14ef37b6 | 1881 | if (rt) { |
6f704992 YH |
1882 | /* Autoconf prefix route */ |
1883 | if (valid_lft == 0) { | |
1884 | ip6_del_rt(rt); | |
1885 | rt = NULL; | |
4bed72e4 | 1886 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 1887 | /* not infinity */ |
1716a961 | 1888 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 1889 | } else { |
1716a961 | 1890 | rt6_clean_expires(rt); |
1da177e4 LT |
1891 | } |
1892 | } else if (valid_lft) { | |
6f704992 | 1893 | clock_t expires = 0; |
4bed72e4 YH |
1894 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1895 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1896 | /* not infinity */ |
1897 | flags |= RTF_EXPIRES; | |
1898 | expires = jiffies_to_clock_t(rt_expires); | |
1899 | } | |
1da177e4 | 1900 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1901 | dev, expires, flags); |
1da177e4 LT |
1902 | } |
1903 | if (rt) | |
d8d1f30b | 1904 | dst_release(&rt->dst); |
1da177e4 LT |
1905 | } |
1906 | ||
1907 | /* Try to figure out our local address for this prefix */ | |
1908 | ||
1909 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 1910 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
1911 | struct in6_addr addr; |
1912 | int create = 0, update_lft = 0; | |
1913 | ||
1914 | if (pinfo->prefix_len == 64) { | |
1915 | memcpy(&addr, &pinfo->prefix, 8); | |
1916 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1917 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1918 | in6_dev_put(in6_dev); | |
1919 | return; | |
1920 | } | |
1921 | goto ok; | |
1922 | } | |
e87cc472 JP |
1923 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
1924 | pinfo->prefix_len); | |
1da177e4 LT |
1925 | in6_dev_put(in6_dev); |
1926 | return; | |
1927 | ||
1928 | ok: | |
1929 | ||
53b7997f | 1930 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1931 | |
1932 | if (ifp == NULL && valid_lft) { | |
1933 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1934 | u32 addr_flags = 0; |
1935 | ||
1936 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1937 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 1938 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
1939 | addr_flags = IFA_F_OPTIMISTIC; |
1940 | #endif | |
1da177e4 LT |
1941 | |
1942 | /* Do not allow to create too much of autoconfigured | |
1943 | * addresses; this would be too easy way to crash kernel. | |
1944 | */ | |
1945 | if (!max_addresses || | |
1946 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1947 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1948 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1949 | addr_flags); | |
1da177e4 LT |
1950 | |
1951 | if (!ifp || IS_ERR(ifp)) { | |
1952 | in6_dev_put(in6_dev); | |
1953 | return; | |
1954 | } | |
1955 | ||
1956 | update_lft = create = 1; | |
1957 | ifp->cstamp = jiffies; | |
cf22f9a2 | 1958 | addrconf_dad_start(ifp); |
1da177e4 LT |
1959 | } |
1960 | ||
1961 | if (ifp) { | |
1962 | int flags; | |
1963 | unsigned long now; | |
1964 | #ifdef CONFIG_IPV6_PRIVACY | |
1965 | struct inet6_ifaddr *ift; | |
1966 | #endif | |
1967 | u32 stored_lft; | |
1968 | ||
1969 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1970 | spin_lock(&ifp->lock); | |
1971 | now = jiffies; | |
1972 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1973 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1974 | else | |
1975 | stored_lft = 0; | |
1976 | if (!update_lft && stored_lft) { | |
1977 | if (valid_lft > MIN_VALID_LIFETIME || | |
1978 | valid_lft > stored_lft) | |
1979 | update_lft = 1; | |
1980 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1981 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1982 | /* |
1983 | * RFC 4862 Section 5.5.3e: | |
1984 | * "Note that the preferred lifetime of | |
1985 | * the corresponding address is always | |
1986 | * reset to the Preferred Lifetime in | |
1987 | * the received Prefix Information | |
1988 | * option, regardless of whether the | |
1989 | * valid lifetime is also reset or | |
1990 | * ignored." | |
1991 | * | |
1992 | * So if the preferred lifetime in | |
1993 | * this advertisement is different | |
1994 | * than what we have stored, but the | |
1995 | * valid lifetime is invalid, just | |
1996 | * reset prefered_lft. | |
1997 | * | |
1998 | * We must set the valid lifetime | |
1999 | * to the stored lifetime since we'll | |
2000 | * be updating the timestamp below, | |
2001 | * else we'll set it back to the | |
25985edc | 2002 | * minimum. |
a1ed0526 BH |
2003 | */ |
2004 | if (prefered_lft != ifp->prefered_lft) { | |
2005 | valid_lft = stored_lft; | |
2006 | update_lft = 1; | |
2007 | } | |
1da177e4 LT |
2008 | } else { |
2009 | valid_lft = MIN_VALID_LIFETIME; | |
2010 | if (valid_lft < prefered_lft) | |
2011 | prefered_lft = valid_lft; | |
2012 | update_lft = 1; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | if (update_lft) { | |
2017 | ifp->valid_lft = valid_lft; | |
2018 | ifp->prefered_lft = prefered_lft; | |
2019 | ifp->tstamp = now; | |
2020 | flags = ifp->flags; | |
2021 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2022 | spin_unlock(&ifp->lock); | |
2023 | ||
2024 | if (!(flags&IFA_F_TENTATIVE)) | |
2025 | ipv6_ifa_notify(0, ifp); | |
2026 | } else | |
2027 | spin_unlock(&ifp->lock); | |
2028 | ||
2029 | #ifdef CONFIG_IPV6_PRIVACY | |
2030 | read_lock_bh(&in6_dev->lock); | |
2031 | /* update all temporary addresses in the list */ | |
76f793e3 LC |
2032 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
2033 | tmp_list) { | |
2034 | int age, max_valid, max_prefered; | |
2035 | ||
c6fbfac2 BB |
2036 | if (ifp != ift->ifpub) |
2037 | continue; | |
2038 | ||
76f793e3 LC |
2039 | /* |
2040 | * RFC 4941 section 3.3: | |
2041 | * If a received option will extend the lifetime | |
2042 | * of a public address, the lifetimes of | |
2043 | * temporary addresses should be extended, | |
2044 | * subject to the overall constraint that no | |
2045 | * temporary addresses should ever remain | |
2046 | * "valid" or "preferred" for a time longer than | |
2047 | * (TEMP_VALID_LIFETIME) or | |
2048 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), | |
2049 | * respectively. | |
2050 | */ | |
2051 | age = (now - ift->cstamp) / HZ; | |
2052 | max_valid = in6_dev->cnf.temp_valid_lft - age; | |
2053 | if (max_valid < 0) | |
2054 | max_valid = 0; | |
2055 | ||
2056 | max_prefered = in6_dev->cnf.temp_prefered_lft - | |
2057 | in6_dev->cnf.max_desync_factor - | |
2058 | age; | |
2059 | if (max_prefered < 0) | |
2060 | max_prefered = 0; | |
2061 | ||
2062 | if (valid_lft > max_valid) | |
2063 | valid_lft = max_valid; | |
2064 | ||
2065 | if (prefered_lft > max_prefered) | |
2066 | prefered_lft = max_prefered; | |
2067 | ||
1da177e4 LT |
2068 | spin_lock(&ift->lock); |
2069 | flags = ift->flags; | |
76f793e3 LC |
2070 | ift->valid_lft = valid_lft; |
2071 | ift->prefered_lft = prefered_lft; | |
2072 | ift->tstamp = now; | |
2073 | if (prefered_lft > 0) | |
2074 | ift->flags &= ~IFA_F_DEPRECATED; | |
2075 | ||
1da177e4 LT |
2076 | spin_unlock(&ift->lock); |
2077 | if (!(flags&IFA_F_TENTATIVE)) | |
2078 | ipv6_ifa_notify(0, ift); | |
2079 | } | |
2080 | ||
aed65501 | 2081 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4 | 2082 | /* |
76f793e3 LC |
2083 | * When a new public address is created as |
2084 | * described in [ADDRCONF], also create a new | |
2085 | * temporary address. Also create a temporary | |
2086 | * address if it's enabled but no temporary | |
2087 | * address currently exists. | |
1da177e4 | 2088 | */ |
1ab1457c | 2089 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2090 | ipv6_create_tempaddr(ifp, NULL); |
2091 | } else { | |
2092 | read_unlock_bh(&in6_dev->lock); | |
2093 | } | |
2094 | #endif | |
2095 | in6_ifa_put(ifp); | |
2096 | addrconf_verify(0); | |
2097 | } | |
2098 | } | |
2099 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2100 | in6_dev_put(in6_dev); | |
2101 | } | |
2102 | ||
2103 | /* | |
2104 | * Set destination address. | |
2105 | * Special case for SIT interfaces where we create a new "virtual" | |
2106 | * device. | |
2107 | */ | |
af284937 | 2108 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2109 | { |
2110 | struct in6_ifreq ireq; | |
2111 | struct net_device *dev; | |
2112 | int err = -EINVAL; | |
2113 | ||
2114 | rtnl_lock(); | |
2115 | ||
2116 | err = -EFAULT; | |
2117 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2118 | goto err_exit; | |
2119 | ||
af284937 | 2120 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2121 | |
2122 | err = -ENODEV; | |
2123 | if (dev == NULL) | |
2124 | goto err_exit; | |
2125 | ||
0be669bb | 2126 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2127 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2128 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2129 | struct ifreq ifr; |
1da177e4 LT |
2130 | struct ip_tunnel_parm p; |
2131 | ||
2132 | err = -EADDRNOTAVAIL; | |
2133 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2134 | goto err_exit; | |
2135 | ||
2136 | memset(&p, 0, sizeof(p)); | |
2137 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2138 | p.iph.saddr = 0; | |
2139 | p.iph.version = 4; | |
2140 | p.iph.ihl = 5; | |
2141 | p.iph.protocol = IPPROTO_IPV6; | |
2142 | p.iph.ttl = 64; | |
d20b3109 | 2143 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2144 | |
5bc3eb7e SH |
2145 | if (ops->ndo_do_ioctl) { |
2146 | mm_segment_t oldfs = get_fs(); | |
2147 | ||
2148 | set_fs(KERNEL_DS); | |
2149 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2150 | set_fs(oldfs); | |
2151 | } else | |
2152 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2153 | |
2154 | if (err == 0) { | |
2155 | err = -ENOBUFS; | |
af284937 DL |
2156 | dev = __dev_get_by_name(net, p.name); |
2157 | if (!dev) | |
1da177e4 LT |
2158 | goto err_exit; |
2159 | err = dev_open(dev); | |
2160 | } | |
2161 | } | |
0be669bb | 2162 | #endif |
1da177e4 LT |
2163 | |
2164 | err_exit: | |
2165 | rtnl_unlock(); | |
2166 | return err; | |
2167 | } | |
2168 | ||
2169 | /* | |
2170 | * Manual configuration of address on an interface | |
2171 | */ | |
b71d1d42 | 2172 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2173 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2174 | __u32 valid_lft) |
1da177e4 LT |
2175 | { |
2176 | struct inet6_ifaddr *ifp; | |
2177 | struct inet6_dev *idev; | |
2178 | struct net_device *dev; | |
2179 | int scope; | |
6f704992 YH |
2180 | u32 flags; |
2181 | clock_t expires; | |
4bed72e4 | 2182 | unsigned long timeout; |
1da177e4 LT |
2183 | |
2184 | ASSERT_RTNL(); | |
1ab1457c | 2185 | |
24ef0da7 TG |
2186 | if (plen > 128) |
2187 | return -EINVAL; | |
2188 | ||
0778769d NT |
2189 | /* check the lifetime */ |
2190 | if (!valid_lft || prefered_lft > valid_lft) | |
2191 | return -EINVAL; | |
2192 | ||
af284937 DL |
2193 | dev = __dev_get_by_index(net, ifindex); |
2194 | if (!dev) | |
1da177e4 | 2195 | return -ENODEV; |
1ab1457c | 2196 | |
64e724f6 BH |
2197 | idev = addrconf_add_dev(dev); |
2198 | if (IS_ERR(idev)) | |
2199 | return PTR_ERR(idev); | |
1da177e4 LT |
2200 | |
2201 | scope = ipv6_addr_scope(pfx); | |
2202 | ||
4bed72e4 YH |
2203 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2204 | if (addrconf_finite_timeout(timeout)) { | |
2205 | expires = jiffies_to_clock_t(timeout * HZ); | |
2206 | valid_lft = timeout; | |
6f704992 | 2207 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2208 | } else { |
2209 | expires = 0; | |
2210 | flags = 0; | |
2211 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2212 | } |
0778769d | 2213 | |
4bed72e4 YH |
2214 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2215 | if (addrconf_finite_timeout(timeout)) { | |
2216 | if (timeout == 0) | |
2217 | ifa_flags |= IFA_F_DEPRECATED; | |
2218 | prefered_lft = timeout; | |
2219 | } | |
0778769d NT |
2220 | |
2221 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2222 | ||
1da177e4 | 2223 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2224 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2225 | ifp->valid_lft = valid_lft; |
2226 | ifp->prefered_lft = prefered_lft; | |
2227 | ifp->tstamp = jiffies; | |
06aebfb7 | 2228 | spin_unlock_bh(&ifp->lock); |
0778769d | 2229 | |
46d48046 | 2230 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2231 | expires, flags); |
95c385b4 NH |
2232 | /* |
2233 | * Note that section 3.1 of RFC 4429 indicates | |
2234 | * that the Optimistic flag should not be set for | |
2235 | * manually configured addresses | |
2236 | */ | |
cf22f9a2 | 2237 | addrconf_dad_start(ifp); |
1da177e4 | 2238 | in6_ifa_put(ifp); |
0778769d | 2239 | addrconf_verify(0); |
1da177e4 LT |
2240 | return 0; |
2241 | } | |
2242 | ||
2243 | return PTR_ERR(ifp); | |
2244 | } | |
2245 | ||
b71d1d42 | 2246 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2247 | unsigned int plen) |
1da177e4 LT |
2248 | { |
2249 | struct inet6_ifaddr *ifp; | |
2250 | struct inet6_dev *idev; | |
2251 | struct net_device *dev; | |
1ab1457c | 2252 | |
24ef0da7 TG |
2253 | if (plen > 128) |
2254 | return -EINVAL; | |
2255 | ||
af284937 DL |
2256 | dev = __dev_get_by_index(net, ifindex); |
2257 | if (!dev) | |
1da177e4 LT |
2258 | return -ENODEV; |
2259 | ||
2260 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2261 | return -ENXIO; | |
2262 | ||
2263 | read_lock_bh(&idev->lock); | |
502a2ffd | 2264 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2265 | if (ifp->prefix_len == plen && |
2266 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2267 | in6_ifa_hold(ifp); | |
2268 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2269 | |
1da177e4 LT |
2270 | ipv6_del_addr(ifp); |
2271 | ||
2272 | /* If the last address is deleted administratively, | |
2273 | disable IPv6 on this interface. | |
2274 | */ | |
502a2ffd | 2275 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2276 | addrconf_ifdown(idev->dev, 1); |
2277 | return 0; | |
2278 | } | |
2279 | } | |
2280 | read_unlock_bh(&idev->lock); | |
2281 | return -EADDRNOTAVAIL; | |
2282 | } | |
2283 | ||
2284 | ||
af284937 | 2285 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2286 | { |
2287 | struct in6_ifreq ireq; | |
2288 | int err; | |
1ab1457c | 2289 | |
1da177e4 LT |
2290 | if (!capable(CAP_NET_ADMIN)) |
2291 | return -EPERM; | |
1ab1457c | 2292 | |
1da177e4 LT |
2293 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2294 | return -EFAULT; | |
2295 | ||
2296 | rtnl_lock(); | |
af284937 DL |
2297 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2298 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2299 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2300 | rtnl_unlock(); |
2301 | return err; | |
2302 | } | |
2303 | ||
af284937 | 2304 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2305 | { |
2306 | struct in6_ifreq ireq; | |
2307 | int err; | |
1ab1457c | 2308 | |
1da177e4 LT |
2309 | if (!capable(CAP_NET_ADMIN)) |
2310 | return -EPERM; | |
2311 | ||
2312 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2313 | return -EFAULT; | |
2314 | ||
2315 | rtnl_lock(); | |
af284937 DL |
2316 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2317 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2318 | rtnl_unlock(); |
2319 | return err; | |
2320 | } | |
2321 | ||
b5f348e5 IJ |
2322 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2323 | int plen, int scope) | |
2324 | { | |
2325 | struct inet6_ifaddr *ifp; | |
2326 | ||
2327 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2328 | if (!IS_ERR(ifp)) { | |
2329 | spin_lock_bh(&ifp->lock); | |
2330 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2331 | spin_unlock_bh(&ifp->lock); | |
2332 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2333 | in6_ifa_put(ifp); | |
2334 | } | |
2335 | } | |
2336 | ||
0be669bb | 2337 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2338 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2339 | { | |
1da177e4 LT |
2340 | struct in6_addr addr; |
2341 | struct net_device *dev; | |
c346dca1 | 2342 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2343 | int scope; |
2344 | ||
2345 | ASSERT_RTNL(); | |
2346 | ||
2347 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2348 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2349 | ||
2350 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2351 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2352 | scope = IFA_LINK; | |
2353 | } else { | |
2354 | scope = IPV6_ADDR_COMPATv4; | |
2355 | } | |
2356 | ||
2357 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2358 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2359 | return; |
2360 | } | |
2361 | ||
6fda7350 | 2362 | for_each_netdev(net, dev) { |
8e5e8f30 | 2363 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2364 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2365 | struct in_ifaddr *ifa; |
1da177e4 LT |
2366 | |
2367 | int flag = scope; | |
2368 | ||
2369 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2370 | int plen; | |
2371 | ||
2372 | addr.s6_addr32[3] = ifa->ifa_local; | |
2373 | ||
2374 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2375 | continue; | |
2376 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2377 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2378 | continue; | |
2379 | flag |= IFA_HOST; | |
2380 | } | |
2381 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2382 | plen = 64; | |
2383 | else | |
2384 | plen = 96; | |
2385 | ||
b5f348e5 | 2386 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2387 | } |
2388 | } | |
1ab1457c | 2389 | } |
1da177e4 | 2390 | } |
0be669bb | 2391 | #endif |
1da177e4 LT |
2392 | |
2393 | static void init_loopback(struct net_device *dev) | |
2394 | { | |
2395 | struct inet6_dev *idev; | |
1da177e4 LT |
2396 | |
2397 | /* ::1 */ | |
2398 | ||
2399 | ASSERT_RTNL(); | |
2400 | ||
2401 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2402 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2403 | return; |
2404 | } | |
2405 | ||
b5f348e5 | 2406 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2407 | } |
2408 | ||
b71d1d42 | 2409 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2410 | { |
8e5e8f30 | 2411 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2412 | u32 addr_flags = IFA_F_PERMANENT; |
2413 | ||
2414 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2415 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2416 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2417 | addr_flags |= IFA_F_OPTIMISTIC; |
2418 | #endif | |
1da177e4 | 2419 | |
95c385b4 NH |
2420 | |
2421 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2422 | if (!IS_ERR(ifp)) { |
46d48046 | 2423 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2424 | addrconf_dad_start(ifp); |
1da177e4 LT |
2425 | in6_ifa_put(ifp); |
2426 | } | |
2427 | } | |
2428 | ||
2429 | static void addrconf_dev_config(struct net_device *dev) | |
2430 | { | |
2431 | struct in6_addr addr; | |
8e5e8f30 | 2432 | struct inet6_dev *idev; |
1da177e4 LT |
2433 | |
2434 | ASSERT_RTNL(); | |
2435 | ||
74235a25 HX |
2436 | if ((dev->type != ARPHRD_ETHER) && |
2437 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2438 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2439 | (dev->type != ARPHRD_INFINIBAND) && |
2440 | (dev->type != ARPHRD_IEEE802154)) { | |
74235a25 HX |
2441 | /* Alas, we support only Ethernet autoconfiguration. */ |
2442 | return; | |
2443 | } | |
2444 | ||
1da177e4 | 2445 | idev = addrconf_add_dev(dev); |
64e724f6 | 2446 | if (IS_ERR(idev)) |
1da177e4 LT |
2447 | return; |
2448 | ||
2449 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2450 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2451 | ||
2452 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2453 | addrconf_add_linklocal(idev, &addr); | |
2454 | } | |
2455 | ||
0be669bb | 2456 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2457 | static void addrconf_sit_config(struct net_device *dev) |
2458 | { | |
2459 | struct inet6_dev *idev; | |
2460 | ||
2461 | ASSERT_RTNL(); | |
2462 | ||
1ab1457c YH |
2463 | /* |
2464 | * Configure the tunnel with one of our IPv4 | |
2465 | * addresses... we should configure all of | |
1da177e4 LT |
2466 | * our v4 addrs in the tunnel |
2467 | */ | |
2468 | ||
2469 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2470 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2471 | return; |
2472 | } | |
2473 | ||
c7dc89c0 FT |
2474 | if (dev->priv_flags & IFF_ISATAP) { |
2475 | struct in6_addr addr; | |
2476 | ||
2477 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2478 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2479 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2480 | addrconf_add_linklocal(idev, &addr); | |
2481 | return; | |
2482 | } | |
2483 | ||
1da177e4 LT |
2484 | sit_add_v4_addrs(idev); |
2485 | ||
2486 | if (dev->flags&IFF_POINTOPOINT) { | |
2487 | addrconf_add_mroute(dev); | |
2488 | addrconf_add_lroute(dev); | |
2489 | } else | |
2490 | sit_route_add(dev); | |
2491 | } | |
0be669bb | 2492 | #endif |
1da177e4 | 2493 | |
aee80b54 | 2494 | #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) |
2495 | static void addrconf_gre_config(struct net_device *dev) | |
2496 | { | |
2497 | struct inet6_dev *idev; | |
2498 | struct in6_addr addr; | |
2499 | ||
f3213831 | 2500 | pr_info("%s(%s)\n", __func__, dev->name); |
aee80b54 | 2501 | |
2502 | ASSERT_RTNL(); | |
2503 | ||
2504 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2505 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2506 | return; |
2507 | } | |
2508 | ||
2509 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2510 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2511 | ||
2512 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2513 | addrconf_add_linklocal(idev, &addr); | |
2514 | } | |
2515 | #endif | |
2516 | ||
1da177e4 LT |
2517 | static inline int |
2518 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2519 | { | |
2520 | struct in6_addr lladdr; | |
2521 | ||
95c385b4 | 2522 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2523 | addrconf_add_linklocal(idev, &lladdr); |
2524 | return 0; | |
2525 | } | |
2526 | return -1; | |
2527 | } | |
2528 | ||
2529 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2530 | { | |
2531 | struct net_device *link_dev; | |
c346dca1 | 2532 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2533 | |
2534 | /* first try to inherit the link-local address from the link device */ | |
2535 | if (idev->dev->iflink && | |
6fda7350 | 2536 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2537 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2538 | return; | |
2539 | } | |
2540 | /* then try to inherit it from any device */ | |
6fda7350 | 2541 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2542 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2543 | return; | |
2544 | } | |
91df42be | 2545 | pr_debug("init ip6-ip6: add_linklocal failed\n"); |
1da177e4 LT |
2546 | } |
2547 | ||
2548 | /* | |
2549 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2550 | * DHCPv6, MLD etc. can be run over the virtual link | |
2551 | */ | |
2552 | ||
2553 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2554 | { | |
2555 | struct inet6_dev *idev; | |
2556 | ||
2557 | ASSERT_RTNL(); | |
2558 | ||
e21e8467 | 2559 | idev = addrconf_add_dev(dev); |
64e724f6 | 2560 | if (IS_ERR(idev)) { |
91df42be | 2561 | pr_debug("init ip6-ip6: add_dev failed\n"); |
1da177e4 LT |
2562 | return; |
2563 | } | |
2564 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2565 | } |
2566 | ||
1ab1457c | 2567 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
8e5e8f30 | 2568 | void *data) |
1da177e4 LT |
2569 | { |
2570 | struct net_device *dev = (struct net_device *) data; | |
74235a25 | 2571 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2572 | int run_pending = 0; |
b217d616 | 2573 | int err; |
1da177e4 | 2574 | |
e21e8467 | 2575 | switch (event) { |
45ba9dd2 | 2576 | case NETDEV_REGISTER: |
74235a25 | 2577 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2578 | idev = ipv6_add_dev(dev); |
2579 | if (!idev) | |
b217d616 | 2580 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2581 | } |
2582 | break; | |
bcdd553f | 2583 | |
1da177e4 | 2584 | case NETDEV_UP: |
3c21edbd | 2585 | case NETDEV_CHANGE: |
c2edacf8 JV |
2586 | if (dev->flags & IFF_SLAVE) |
2587 | break; | |
2588 | ||
3c21edbd | 2589 | if (event == NETDEV_UP) { |
f24e3d65 | 2590 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2591 | /* device is not ready yet. */ |
f3213831 | 2592 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2593 | dev->name); |
2594 | break; | |
2595 | } | |
99081049 | 2596 | |
d31c7b8f EP |
2597 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2598 | idev = ipv6_add_dev(dev); | |
2599 | ||
e3ec6cfc | 2600 | if (idev) { |
99081049 | 2601 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2602 | run_pending = 1; |
2603 | } | |
3c21edbd | 2604 | } else { |
f24e3d65 | 2605 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2606 | /* device is still not ready. */ |
2607 | break; | |
2608 | } | |
2609 | ||
2610 | if (idev) { | |
bcdd553f | 2611 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2612 | /* device is already configured. */ |
2613 | break; | |
3c21edbd YH |
2614 | idev->if_flags |= IF_READY; |
2615 | } | |
2616 | ||
f3213831 JP |
2617 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2618 | dev->name); | |
3c21edbd | 2619 | |
c5e33bdd | 2620 | run_pending = 1; |
3c21edbd YH |
2621 | } |
2622 | ||
e21e8467 | 2623 | switch (dev->type) { |
0be669bb | 2624 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2625 | case ARPHRD_SIT: |
2626 | addrconf_sit_config(dev); | |
2627 | break; | |
aee80b54 | 2628 | #endif |
2629 | #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) | |
2630 | case ARPHRD_IPGRE: | |
2631 | addrconf_gre_config(dev); | |
2632 | break; | |
0be669bb | 2633 | #endif |
1da177e4 LT |
2634 | case ARPHRD_TUNNEL6: |
2635 | addrconf_ip6_tnl_config(dev); | |
2636 | break; | |
2637 | case ARPHRD_LOOPBACK: | |
2638 | init_loopback(dev); | |
2639 | break; | |
2640 | ||
2641 | default: | |
2642 | addrconf_dev_config(dev); | |
2643 | break; | |
3ff50b79 | 2644 | } |
bcdd553f | 2645 | |
1da177e4 | 2646 | if (idev) { |
c5e33bdd YH |
2647 | if (run_pending) |
2648 | addrconf_dad_run(idev); | |
2649 | ||
bcdd553f SH |
2650 | /* |
2651 | * If the MTU changed during the interface down, | |
2652 | * when the interface up, the changed MTU must be | |
2653 | * reflected in the idev as well as routers. | |
1da177e4 | 2654 | */ |
bcdd553f SH |
2655 | if (idev->cnf.mtu6 != dev->mtu && |
2656 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2657 | rt6_mtu_change(dev, dev->mtu); |
2658 | idev->cnf.mtu6 = dev->mtu; | |
2659 | } | |
2660 | idev->tstamp = jiffies; | |
2661 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2662 | |
2663 | /* | |
2664 | * If the changed mtu during down is lower than | |
2665 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2666 | */ |
2667 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2668 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2669 | } |
2670 | break; | |
2671 | ||
2672 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2673 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2674 | rt6_mtu_change(dev, dev->mtu); |
2675 | idev->cnf.mtu6 = dev->mtu; | |
2676 | break; | |
2677 | } | |
2678 | ||
d31c7b8f EP |
2679 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2680 | idev = ipv6_add_dev(dev); | |
2681 | if (idev) | |
2682 | break; | |
2683 | } | |
2684 | ||
bcdd553f SH |
2685 | /* |
2686 | * MTU falled under IPV6_MIN_MTU. | |
2687 | * Stop IPv6 on this interface. | |
2688 | */ | |
1da177e4 LT |
2689 | |
2690 | case NETDEV_DOWN: | |
2691 | case NETDEV_UNREGISTER: | |
2692 | /* | |
2693 | * Remove all addresses from this interface. | |
2694 | */ | |
2695 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2696 | break; | |
3c21edbd | 2697 | |
1da177e4 | 2698 | case NETDEV_CHANGENAME: |
1da177e4 | 2699 | if (idev) { |
5632c515 | 2700 | snmp6_unregister_dev(idev); |
408c4768 | 2701 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2702 | addrconf_sysctl_register(idev); |
b217d616 HX |
2703 | err = snmp6_register_dev(idev); |
2704 | if (err) | |
2705 | return notifier_from_errno(err); | |
5632c515 | 2706 | } |
1da177e4 | 2707 | break; |
bcdd553f | 2708 | |
93d9b7d7 JP |
2709 | case NETDEV_PRE_TYPE_CHANGE: |
2710 | case NETDEV_POST_TYPE_CHANGE: | |
2711 | addrconf_type_change(dev, event); | |
75c78500 | 2712 | break; |
3ff50b79 | 2713 | } |
1da177e4 LT |
2714 | |
2715 | return NOTIFY_OK; | |
2716 | } | |
2717 | ||
2718 | /* | |
2719 | * addrconf module should be notified of a device going up | |
2720 | */ | |
2721 | static struct notifier_block ipv6_dev_notf = { | |
2722 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2723 | }; |
2724 | ||
93d9b7d7 | 2725 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2726 | { |
2727 | struct inet6_dev *idev; | |
2728 | ASSERT_RTNL(); | |
2729 | ||
2730 | idev = __in6_dev_get(dev); | |
2731 | ||
93d9b7d7 | 2732 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2733 | ipv6_mc_remap(idev); |
93d9b7d7 | 2734 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2735 | ipv6_mc_unmap(idev); |
2736 | } | |
2737 | ||
1da177e4 LT |
2738 | static int addrconf_ifdown(struct net_device *dev, int how) |
2739 | { | |
c346dca1 | 2740 | struct net *net = dev_net(dev); |
502a2ffd | 2741 | struct inet6_dev *idev; |
2742 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 2743 | int state, i; |
1da177e4 LT |
2744 | |
2745 | ASSERT_RTNL(); | |
2746 | ||
73a8bd74 DM |
2747 | rt6_ifdown(net, dev); |
2748 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
2749 | |
2750 | idev = __in6_dev_get(dev); | |
2751 | if (idev == NULL) | |
2752 | return -ENODEV; | |
2753 | ||
bcdd553f SH |
2754 | /* |
2755 | * Step 1: remove reference to ipv6 device from parent device. | |
2756 | * Do not dev_put! | |
1da177e4 | 2757 | */ |
439e2385 | 2758 | if (how) { |
1da177e4 | 2759 | idev->dead = 1; |
8814c4b5 YH |
2760 | |
2761 | /* protected by rtnl_lock */ | |
a9b3cd7f | 2762 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
2763 | |
2764 | /* Step 1.5: remove snmp6 entry */ | |
2765 | snmp6_unregister_dev(idev); | |
2766 | ||
2767 | } | |
2768 | ||
73a8bd74 DM |
2769 | /* Step 2: clear hash table */ |
2770 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
2771 | struct hlist_head *h = &inet6_addr_lst[i]; | |
2772 | struct hlist_node *n; | |
2773 | ||
2774 | spin_lock_bh(&addrconf_hash_lock); | |
2775 | restart: | |
2776 | hlist_for_each_entry_rcu(ifa, n, h, addr_lst) { | |
2777 | if (ifa->idev == idev) { | |
2778 | hlist_del_init_rcu(&ifa->addr_lst); | |
2779 | addrconf_del_timer(ifa); | |
2780 | goto restart; | |
2781 | } | |
2782 | } | |
2783 | spin_unlock_bh(&addrconf_hash_lock); | |
2784 | } | |
2785 | ||
1da177e4 LT |
2786 | write_lock_bh(&idev->lock); |
2787 | ||
bcdd553f | 2788 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2789 | if (!how) |
3c21edbd | 2790 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2791 | |
1da177e4 | 2792 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 2793 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2794 | in6_dev_put(idev); |
2795 | ||
bcdd553f | 2796 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2797 | while (!list_empty(&idev->tempaddr_list)) { |
2798 | ifa = list_first_entry(&idev->tempaddr_list, | |
2799 | struct inet6_ifaddr, tmp_list); | |
2800 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2801 | write_unlock_bh(&idev->lock); |
2802 | spin_lock_bh(&ifa->lock); | |
2803 | ||
2804 | if (ifa->ifpub) { | |
2805 | in6_ifa_put(ifa->ifpub); | |
2806 | ifa->ifpub = NULL; | |
2807 | } | |
2808 | spin_unlock_bh(&ifa->lock); | |
2809 | in6_ifa_put(ifa); | |
2810 | write_lock_bh(&idev->lock); | |
2811 | } | |
2812 | #endif | |
8f37ada5 | 2813 | |
502a2ffd | 2814 | while (!list_empty(&idev->addr_list)) { |
2815 | ifa = list_first_entry(&idev->addr_list, | |
2816 | struct inet6_ifaddr, if_list); | |
84e8b803 | 2817 | addrconf_del_timer(ifa); |
2818 | ||
73a8bd74 | 2819 | list_del(&ifa->if_list); |
84e8b803 | 2820 | |
73a8bd74 | 2821 | write_unlock_bh(&idev->lock); |
84e8b803 | 2822 | |
73a8bd74 DM |
2823 | spin_lock_bh(&ifa->state_lock); |
2824 | state = ifa->state; | |
2825 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
2826 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 2827 | |
73a8bd74 DM |
2828 | if (state != INET6_IFADDR_STATE_DEAD) { |
2829 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2830 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); | |
27bdb2ab | 2831 | } |
73a8bd74 | 2832 | in6_ifa_put(ifa); |
8f37ada5 | 2833 | |
73a8bd74 DM |
2834 | write_lock_bh(&idev->lock); |
2835 | } | |
8f37ada5 | 2836 | |
1da177e4 LT |
2837 | write_unlock_bh(&idev->lock); |
2838 | ||
2839 | /* Step 5: Discard multicast list */ | |
439e2385 | 2840 | if (how) |
1da177e4 LT |
2841 | ipv6_mc_destroy_dev(idev); |
2842 | else | |
2843 | ipv6_mc_down(idev); | |
2844 | ||
1da177e4 | 2845 | idev->tstamp = jiffies; |
1ab1457c | 2846 | |
bcdd553f | 2847 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 2848 | if (how) { |
408c4768 | 2849 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2850 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2851 | neigh_ifdown(&nd_tbl, dev); | |
2852 | in6_dev_put(idev); | |
2853 | } | |
2854 | return 0; | |
2855 | } | |
2856 | ||
2857 | static void addrconf_rs_timer(unsigned long data) | |
2858 | { | |
2859 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2860 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2861 | |
5b2a1953 | 2862 | read_lock(&idev->lock); |
2863 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
2864 | goto out; |
2865 | ||
5b2a1953 | 2866 | if (idev->cnf.forwarding) |
2867 | goto out; | |
2868 | ||
2869 | /* Announcement received after solicitation was sent */ | |
2870 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 2871 | goto out; |
1da177e4 LT |
2872 | |
2873 | spin_lock(&ifp->lock); | |
5b2a1953 | 2874 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
2875 | /* The wait after the last probe can be shorter */ |
2876 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 2877 | (ifp->probes == idev->cnf.rtr_solicits) ? |
2878 | idev->cnf.rtr_solicit_delay : | |
2879 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
2880 | spin_unlock(&ifp->lock); |
2881 | ||
5b2a1953 | 2882 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2883 | } else { |
2884 | spin_unlock(&ifp->lock); | |
2885 | /* | |
2886 | * Note: we do not support deprecated "all on-link" | |
2887 | * assumption any longer. | |
2888 | */ | |
91df42be | 2889 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
2890 | } |
2891 | ||
2892 | out: | |
5b2a1953 | 2893 | read_unlock(&idev->lock); |
1da177e4 LT |
2894 | in6_ifa_put(ifp); |
2895 | } | |
2896 | ||
2897 | /* | |
2898 | * Duplicate Address Detection | |
2899 | */ | |
3c21edbd YH |
2900 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2901 | { | |
2902 | unsigned long rand_num; | |
2903 | struct inet6_dev *idev = ifp->idev; | |
2904 | ||
95c385b4 NH |
2905 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2906 | rand_num = 0; | |
2907 | else | |
2908 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2909 | ||
3c21edbd YH |
2910 | ifp->probes = idev->cnf.dad_transmits; |
2911 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2912 | } | |
2913 | ||
cf22f9a2 | 2914 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2915 | { |
2916 | struct inet6_dev *idev = ifp->idev; | |
2917 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2918 | |
2919 | addrconf_join_solict(dev, &ifp->addr); | |
2920 | ||
1da177e4 | 2921 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2922 | |
2923 | read_lock_bh(&idev->lock); | |
622ccdf1 | 2924 | spin_lock(&ifp->lock); |
e9d3e084 | 2925 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 2926 | goto out; |
1da177e4 LT |
2927 | |
2928 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 2929 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2930 | !(ifp->flags&IFA_F_TENTATIVE) || |
2931 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2932 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2933 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2934 | read_unlock_bh(&idev->lock); |
2935 | ||
2936 | addrconf_dad_completed(ifp); | |
2937 | return; | |
2938 | } | |
2939 | ||
6732bade | 2940 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 2941 | spin_unlock(&ifp->lock); |
6732bade | 2942 | read_unlock_bh(&idev->lock); |
3c21edbd | 2943 | /* |
590a9887 | 2944 | * If the device is not ready: |
3c21edbd YH |
2945 | * - keep it tentative if it is a permanent address. |
2946 | * - otherwise, kill it. | |
2947 | */ | |
2948 | in6_ifa_hold(ifp); | |
cc411d0b | 2949 | addrconf_dad_stop(ifp, 0); |
6732bade | 2950 | return; |
3c21edbd | 2951 | } |
95c385b4 NH |
2952 | |
2953 | /* | |
2954 | * Optimistic nodes can start receiving | |
2955 | * Frames right away | |
2956 | */ | |
e21e8467 | 2957 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
2958 | ip6_ins_rt(ifp->rt); |
2959 | ||
6732bade | 2960 | addrconf_dad_kick(ifp); |
1da177e4 | 2961 | out: |
622ccdf1 | 2962 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2963 | read_unlock_bh(&idev->lock); |
2964 | } | |
2965 | ||
2966 | static void addrconf_dad_timer(unsigned long data) | |
2967 | { | |
2968 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2969 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2970 | struct in6_addr mcaddr; |
2971 | ||
f2344a13 HX |
2972 | if (!ifp->probes && addrconf_dad_end(ifp)) |
2973 | goto out; | |
2974 | ||
122e4519 | 2975 | read_lock(&idev->lock); |
2976 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
2977 | read_unlock(&idev->lock); | |
1da177e4 LT |
2978 | goto out; |
2979 | } | |
21809faf | 2980 | |
2981 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
2982 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
2983 | spin_unlock(&ifp->lock); | |
2984 | read_unlock(&idev->lock); | |
2985 | goto out; | |
2986 | } | |
2987 | ||
1da177e4 LT |
2988 | if (ifp->probes == 0) { |
2989 | /* | |
2990 | * DAD was successful | |
2991 | */ | |
2992 | ||
cc411d0b | 2993 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2994 | spin_unlock(&ifp->lock); |
122e4519 | 2995 | read_unlock(&idev->lock); |
1da177e4 LT |
2996 | |
2997 | addrconf_dad_completed(ifp); | |
2998 | ||
2999 | goto out; | |
3000 | } | |
3001 | ||
3002 | ifp->probes--; | |
3003 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 3004 | spin_unlock(&ifp->lock); |
122e4519 | 3005 | read_unlock(&idev->lock); |
1da177e4 LT |
3006 | |
3007 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3008 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3009 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3010 | out: |
3011 | in6_ifa_put(ifp); | |
3012 | } | |
3013 | ||
3014 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3015 | { | |
e21e8467 | 3016 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
3017 | |
3018 | /* | |
3019 | * Configure the address for reception. Now it is valid. | |
3020 | */ | |
3021 | ||
3022 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3023 | ||
026359bc TA |
3024 | /* If added prefix is link local and we are prepared to process |
3025 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3026 | */ |
3027 | ||
026359bc TA |
3028 | if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) || |
3029 | ifp->idev->cnf.accept_ra == 2) && | |
1da177e4 LT |
3030 | ifp->idev->cnf.rtr_solicits > 0 && |
3031 | (dev->flags&IFF_LOOPBACK) == 0 && | |
3032 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
3033 | /* |
3034 | * If a host as already performed a random delay | |
3035 | * [...] as part of DAD [...] there is no need | |
3036 | * to delay again before sending the first RS | |
3037 | */ | |
f3ee4010 | 3038 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
3039 | |
3040 | spin_lock_bh(&ifp->lock); | |
3041 | ifp->probes = 1; | |
3042 | ifp->idev->if_flags |= IF_RS_SENT; | |
3043 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
3044 | spin_unlock_bh(&ifp->lock); | |
3045 | } | |
3046 | } | |
3047 | ||
e21e8467 SH |
3048 | static void addrconf_dad_run(struct inet6_dev *idev) |
3049 | { | |
c5e33bdd YH |
3050 | struct inet6_ifaddr *ifp; |
3051 | ||
3052 | read_lock_bh(&idev->lock); | |
502a2ffd | 3053 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3054 | spin_lock(&ifp->lock); |
f2344a13 HX |
3055 | if (ifp->flags & IFA_F_TENTATIVE && |
3056 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3057 | addrconf_dad_kick(ifp); | |
21809faf | 3058 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3059 | } |
3060 | read_unlock_bh(&idev->lock); | |
3061 | } | |
3062 | ||
1da177e4 LT |
3063 | #ifdef CONFIG_PROC_FS |
3064 | struct if6_iter_state { | |
3c40090a | 3065 | struct seq_net_private p; |
1da177e4 | 3066 | int bucket; |
1d578303 | 3067 | int offset; |
1da177e4 LT |
3068 | }; |
3069 | ||
1d578303 | 3070 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3071 | { |
3072 | struct inet6_ifaddr *ifa = NULL; | |
3073 | struct if6_iter_state *state = seq->private; | |
1218854a | 3074 | struct net *net = seq_file_net(seq); |
1d578303 | 3075 | int p = 0; |
1da177e4 | 3076 | |
1d578303 MM |
3077 | /* initial bucket if pos is 0 */ |
3078 | if (pos == 0) { | |
3079 | state->bucket = 0; | |
3080 | state->offset = 0; | |
3081 | } | |
3082 | ||
3083 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
c2e21293 | 3084 | struct hlist_node *n; |
4f70ecca | 3085 | hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket], |
1d578303 MM |
3086 | addr_lst) { |
3087 | /* sync with offset */ | |
3088 | if (p < state->offset) { | |
3089 | p++; | |
3090 | continue; | |
3091 | } | |
3092 | state->offset++; | |
c2e21293 | 3093 | if (net_eq(dev_net(ifa->idev->dev), net)) |
3094 | return ifa; | |
1d578303 MM |
3095 | } |
3096 | ||
3097 | /* prepare for next bucket */ | |
3098 | state->offset = 0; | |
3099 | p = 0; | |
1da177e4 | 3100 | } |
c2e21293 | 3101 | return NULL; |
1da177e4 LT |
3102 | } |
3103 | ||
c2e21293 | 3104 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3105 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3106 | { |
3107 | struct if6_iter_state *state = seq->private; | |
1218854a | 3108 | struct net *net = seq_file_net(seq); |
c2e21293 | 3109 | struct hlist_node *n = &ifa->addr_lst; |
1da177e4 | 3110 | |
1d578303 MM |
3111 | hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) { |
3112 | state->offset++; | |
c2e21293 | 3113 | if (net_eq(dev_net(ifa->idev->dev), net)) |
3114 | return ifa; | |
1d578303 | 3115 | } |
3c40090a | 3116 | |
c2e21293 | 3117 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3118 | state->offset = 0; |
4f70ecca | 3119 | hlist_for_each_entry_rcu_bh(ifa, n, |
c2e21293 | 3120 | &inet6_addr_lst[state->bucket], addr_lst) { |
1d578303 | 3121 | state->offset++; |
c2e21293 | 3122 | if (net_eq(dev_net(ifa->idev->dev), net)) |
3123 | return ifa; | |
3124 | } | |
1da177e4 | 3125 | } |
3c40090a | 3126 | |
c2e21293 | 3127 | return NULL; |
1da177e4 LT |
3128 | } |
3129 | ||
1da177e4 | 3130 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3131 | __acquires(rcu_bh) |
1da177e4 | 3132 | { |
5c578aed | 3133 | rcu_read_lock_bh(); |
1d578303 | 3134 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3135 | } |
3136 | ||
3137 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3138 | { | |
3139 | struct inet6_ifaddr *ifa; | |
3140 | ||
3141 | ifa = if6_get_next(seq, v); | |
3142 | ++*pos; | |
3143 | return ifa; | |
3144 | } | |
3145 | ||
3146 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3147 | __releases(rcu_bh) |
1da177e4 | 3148 | { |
5c578aed | 3149 | rcu_read_unlock_bh(); |
1da177e4 LT |
3150 | } |
3151 | ||
3152 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3153 | { | |
3154 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3155 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3156 | &ifp->addr, |
1da177e4 LT |
3157 | ifp->idev->dev->ifindex, |
3158 | ifp->prefix_len, | |
3159 | ifp->scope, | |
3160 | ifp->flags, | |
3161 | ifp->idev->dev->name); | |
3162 | return 0; | |
3163 | } | |
3164 | ||
56b3d975 | 3165 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3166 | .start = if6_seq_start, |
3167 | .next = if6_seq_next, | |
3168 | .show = if6_seq_show, | |
3169 | .stop = if6_seq_stop, | |
3170 | }; | |
3171 | ||
3172 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3173 | { | |
3c40090a DL |
3174 | return seq_open_net(inode, file, &if6_seq_ops, |
3175 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3176 | } |
3177 | ||
9a32144e | 3178 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3179 | .owner = THIS_MODULE, |
3180 | .open = if6_seq_open, | |
3181 | .read = seq_read, | |
3182 | .llseek = seq_lseek, | |
3c40090a | 3183 | .release = seq_release_net, |
1da177e4 LT |
3184 | }; |
3185 | ||
2c8c1e72 | 3186 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3187 | { |
3c40090a | 3188 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3189 | return -ENOMEM; |
3190 | return 0; | |
3191 | } | |
3192 | ||
2c8c1e72 | 3193 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a DL |
3194 | { |
3195 | proc_net_remove(net, "if_inet6"); | |
3196 | } | |
3197 | ||
3198 | static struct pernet_operations if6_proc_net_ops = { | |
3199 | .init = if6_proc_net_init, | |
3200 | .exit = if6_proc_net_exit, | |
3201 | }; | |
3202 | ||
3203 | int __init if6_proc_init(void) | |
3204 | { | |
3205 | return register_pernet_subsys(&if6_proc_net_ops); | |
3206 | } | |
3207 | ||
1da177e4 LT |
3208 | void if6_proc_exit(void) |
3209 | { | |
3c40090a | 3210 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3211 | } |
3212 | #endif /* CONFIG_PROC_FS */ | |
3213 | ||
59fbb3a6 | 3214 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3215 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3216 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3217 | { |
3218 | int ret = 0; | |
c2e21293 | 3219 | struct inet6_ifaddr *ifp = NULL; |
3220 | struct hlist_node *n; | |
ddbe5032 | 3221 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3222 | |
5c578aed | 3223 | rcu_read_lock_bh(); |
4f70ecca | 3224 | hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3225 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3226 | continue; |
caad295f | 3227 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3228 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3229 | ret = 1; | |
3230 | break; | |
3231 | } | |
3232 | } | |
5c578aed | 3233 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3234 | return ret; |
3235 | } | |
3236 | #endif | |
3237 | ||
1da177e4 LT |
3238 | /* |
3239 | * Periodic address status verification | |
3240 | */ | |
3241 | ||
3242 | static void addrconf_verify(unsigned long foo) | |
3243 | { | |
b2db7564 | 3244 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3245 | struct inet6_ifaddr *ifp; |
c2e21293 | 3246 | struct hlist_node *node; |
1da177e4 LT |
3247 | int i; |
3248 | ||
5c578aed | 3249 | rcu_read_lock_bh(); |
3250 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3251 | now = jiffies; |
b2db7564 | 3252 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3253 | |
3254 | del_timer(&addr_chk_timer); | |
3255 | ||
bcdd553f | 3256 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3257 | restart: |
4f70ecca | 3258 | hlist_for_each_entry_rcu_bh(ifp, node, |
5c578aed | 3259 | &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3260 | unsigned long age; |
1da177e4 LT |
3261 | |
3262 | if (ifp->flags & IFA_F_PERMANENT) | |
3263 | continue; | |
3264 | ||
3265 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3266 | /* We try to batch several events at once. */ |
3267 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3268 | |
8f27ebb9 YH |
3269 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3270 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3271 | spin_unlock(&ifp->lock); |
3272 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3273 | ipv6_del_addr(ifp); |
3274 | goto restart; | |
8f27ebb9 YH |
3275 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3276 | spin_unlock(&ifp->lock); | |
3277 | continue; | |
1da177e4 | 3278 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3279 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3280 | int deprecate = 0; |
3281 | ||
3282 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3283 | deprecate = 1; | |
3284 | ifp->flags |= IFA_F_DEPRECATED; | |
3285 | } | |
3286 | ||
3287 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3288 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3289 | ||
3290 | spin_unlock(&ifp->lock); | |
3291 | ||
3292 | if (deprecate) { | |
3293 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3294 | |
3295 | ipv6_ifa_notify(0, ifp); | |
3296 | in6_ifa_put(ifp); | |
3297 | goto restart; | |
3298 | } | |
3299 | #ifdef CONFIG_IPV6_PRIVACY | |
3300 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3301 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3302 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3303 | ifp->idev->cnf.dad_transmits * | |
3304 | ifp->idev->nd_parms->retrans_time / HZ; | |
3305 | ||
1da177e4 LT |
3306 | if (age >= ifp->prefered_lft - regen_advance) { |
3307 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3308 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3309 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3310 | if (!ifp->regen_count && ifpub) { | |
3311 | ifp->regen_count++; | |
3312 | in6_ifa_hold(ifp); | |
3313 | in6_ifa_hold(ifpub); | |
3314 | spin_unlock(&ifp->lock); | |
5c578aed | 3315 | |
291d809b HY |
3316 | spin_lock(&ifpub->lock); |
3317 | ifpub->regen_count = 0; | |
3318 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3319 | ipv6_create_tempaddr(ifpub, ifp); |
3320 | in6_ifa_put(ifpub); | |
3321 | in6_ifa_put(ifp); | |
3322 | goto restart; | |
3323 | } | |
3324 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3325 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3326 | spin_unlock(&ifp->lock); | |
3327 | #endif | |
3328 | } else { | |
3329 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3330 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3331 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3332 | spin_unlock(&ifp->lock); | |
3333 | } | |
3334 | } | |
1da177e4 LT |
3335 | } |
3336 | ||
b2db7564 YH |
3337 | next_sec = round_jiffies_up(next); |
3338 | next_sched = next; | |
3339 | ||
3340 | /* If rounded timeout is accurate enough, accept it. */ | |
3341 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3342 | next_sched = next_sec; | |
3343 | ||
3344 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3345 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3346 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3347 | ||
3348 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3349 | now, next, next_sec, next_sched)); | |
3350 | ||
3351 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3352 | add_timer(&addr_chk_timer); |
5c578aed | 3353 | spin_unlock(&addrconf_verify_lock); |
3354 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3355 | } |
3356 | ||
461d8837 TG |
3357 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3358 | { | |
3359 | struct in6_addr *pfx = NULL; | |
3360 | ||
3361 | if (addr) | |
3362 | pfx = nla_data(addr); | |
3363 | ||
3364 | if (local) { | |
3365 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3366 | pfx = NULL; | |
3367 | else | |
3368 | pfx = nla_data(local); | |
3369 | } | |
3370 | ||
3371 | return pfx; | |
3372 | } | |
3373 | ||
ef7c79ed | 3374 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3375 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3376 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3377 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3378 | }; | |
3379 | ||
1da177e4 LT |
3380 | static int |
3381 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3382 | { | |
3b1e0a65 | 3383 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3384 | struct ifaddrmsg *ifm; |
3385 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3386 | struct in6_addr *pfx; |
b933f716 | 3387 | int err; |
1da177e4 | 3388 | |
b933f716 TG |
3389 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3390 | if (err < 0) | |
3391 | return err; | |
3392 | ||
3393 | ifm = nlmsg_data(nlh); | |
3394 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3395 | if (pfx == NULL) |
3396 | return -EINVAL; | |
3397 | ||
af284937 | 3398 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3399 | } |
3400 | ||
55ebaef1 NT |
3401 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3402 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3403 | { |
6f704992 YH |
3404 | u32 flags; |
3405 | clock_t expires; | |
4bed72e4 | 3406 | unsigned long timeout; |
46d48046 | 3407 | |
081bba5b NT |
3408 | if (!valid_lft || (prefered_lft > valid_lft)) |
3409 | return -EINVAL; | |
3410 | ||
4bed72e4 YH |
3411 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3412 | if (addrconf_finite_timeout(timeout)) { | |
3413 | expires = jiffies_to_clock_t(timeout * HZ); | |
3414 | valid_lft = timeout; | |
6f704992 | 3415 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3416 | } else { |
3417 | expires = 0; | |
3418 | flags = 0; | |
3419 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3420 | } |
081bba5b | 3421 | |
4bed72e4 YH |
3422 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3423 | if (addrconf_finite_timeout(timeout)) { | |
3424 | if (timeout == 0) | |
3425 | ifa_flags |= IFA_F_DEPRECATED; | |
3426 | prefered_lft = timeout; | |
3427 | } | |
081bba5b NT |
3428 | |
3429 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3430 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3431 | ifp->tstamp = jiffies; |
3432 | ifp->valid_lft = valid_lft; | |
3433 | ifp->prefered_lft = prefered_lft; | |
3434 | ||
3435 | spin_unlock_bh(&ifp->lock); | |
3436 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3437 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3438 | |
46d48046 | 3439 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3440 | expires, flags); |
081bba5b NT |
3441 | addrconf_verify(0); |
3442 | ||
3443 | return 0; | |
3444 | } | |
3445 | ||
1da177e4 LT |
3446 | static int |
3447 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3448 | { | |
3b1e0a65 | 3449 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3450 | struct ifaddrmsg *ifm; |
3451 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3452 | struct in6_addr *pfx; |
7198f8ce TG |
3453 | struct inet6_ifaddr *ifa; |
3454 | struct net_device *dev; | |
55ebaef1 NT |
3455 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3456 | u8 ifa_flags; | |
461d8837 | 3457 | int err; |
1da177e4 | 3458 | |
461d8837 TG |
3459 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3460 | if (err < 0) | |
3461 | return err; | |
3462 | ||
3463 | ifm = nlmsg_data(nlh); | |
3464 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3465 | if (pfx == NULL) |
3466 | return -EINVAL; | |
3467 | ||
461d8837 | 3468 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3469 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3470 | |
3471 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3472 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3473 | preferred_lft = ci->ifa_prefered; |
3474 | } else { | |
3475 | preferred_lft = INFINITY_LIFE_TIME; | |
3476 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3477 | } |
3478 | ||
af284937 | 3479 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3480 | if (dev == NULL) |
3481 | return -ENODEV; | |
3482 | ||
55ebaef1 | 3483 | /* We ignore other flags so far. */ |
3b9f9a1c | 3484 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3485 | |
1cab3da6 | 3486 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3487 | if (ifa == NULL) { |
3488 | /* | |
3489 | * It would be best to check for !NLM_F_CREATE here but | |
3490 | * userspace alreay relies on not having to provide this. | |
3491 | */ | |
af284937 DL |
3492 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3493 | ifm->ifa_prefixlen, ifa_flags, | |
3494 | preferred_lft, valid_lft); | |
081bba5b NT |
3495 | } |
3496 | ||
7198f8ce TG |
3497 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3498 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3499 | err = -EEXIST; | |
3500 | else | |
55ebaef1 | 3501 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3502 | |
3503 | in6_ifa_put(ifa); | |
3504 | ||
3505 | return err; | |
1da177e4 LT |
3506 | } |
3507 | ||
101bb229 TG |
3508 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3509 | u8 scope, int ifindex) | |
3510 | { | |
3511 | struct ifaddrmsg *ifm; | |
3512 | ||
3513 | ifm = nlmsg_data(nlh); | |
3514 | ifm->ifa_family = AF_INET6; | |
3515 | ifm->ifa_prefixlen = prefixlen; | |
3516 | ifm->ifa_flags = flags; | |
3517 | ifm->ifa_scope = scope; | |
3518 | ifm->ifa_index = ifindex; | |
3519 | } | |
3520 | ||
85486af0 TG |
3521 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3522 | unsigned long tstamp, u32 preferred, u32 valid) | |
3523 | { | |
3524 | struct ifa_cacheinfo ci; | |
3525 | ||
18a31e1e TG |
3526 | ci.cstamp = cstamp_delta(cstamp); |
3527 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3528 | ci.ifa_prefered = preferred; |
3529 | ci.ifa_valid = valid; | |
3530 | ||
3531 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3532 | } | |
3533 | ||
101bb229 TG |
3534 | static inline int rt_scope(int ifa_scope) |
3535 | { | |
3536 | if (ifa_scope & IFA_HOST) | |
3537 | return RT_SCOPE_HOST; | |
3538 | else if (ifa_scope & IFA_LINK) | |
3539 | return RT_SCOPE_LINK; | |
3540 | else if (ifa_scope & IFA_SITE) | |
3541 | return RT_SCOPE_SITE; | |
3542 | else | |
3543 | return RT_SCOPE_UNIVERSE; | |
3544 | } | |
3545 | ||
0ab6803b TG |
3546 | static inline int inet6_ifaddr_msgsize(void) |
3547 | { | |
339bf98f TG |
3548 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3549 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3550 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3551 | } |
c5396a31 | 3552 | |
1da177e4 | 3553 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3554 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3555 | { |
1da177e4 | 3556 | struct nlmsghdr *nlh; |
85486af0 | 3557 | u32 preferred, valid; |
1da177e4 | 3558 | |
0ab6803b TG |
3559 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3560 | if (nlh == NULL) | |
26932566 | 3561 | return -EMSGSIZE; |
0ab6803b | 3562 | |
101bb229 TG |
3563 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3564 | ifa->idev->dev->ifindex); | |
3565 | ||
1da177e4 | 3566 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3567 | preferred = ifa->prefered_lft; |
3568 | valid = ifa->valid_lft; | |
3569 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3570 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3571 | if (preferred > tval) |
3572 | preferred -= tval; | |
3573 | else | |
3574 | preferred = 0; | |
f56619fc BH |
3575 | if (valid != INFINITY_LIFE_TIME) { |
3576 | if (valid > tval) | |
3577 | valid -= tval; | |
3578 | else | |
3579 | valid = 0; | |
3580 | } | |
1da177e4 LT |
3581 | } |
3582 | } else { | |
85486af0 TG |
3583 | preferred = INFINITY_LIFE_TIME; |
3584 | valid = INFINITY_LIFE_TIME; | |
3585 | } | |
3586 | ||
0ab6803b | 3587 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3588 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3589 | nlmsg_cancel(skb, nlh); | |
3590 | return -EMSGSIZE; | |
3591 | } | |
1da177e4 | 3592 | |
0ab6803b | 3593 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3594 | } |
3595 | ||
3596 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3597 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3598 | { |
1da177e4 | 3599 | struct nlmsghdr *nlh; |
101bb229 TG |
3600 | u8 scope = RT_SCOPE_UNIVERSE; |
3601 | int ifindex = ifmca->idev->dev->ifindex; | |
3602 | ||
3603 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3604 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3605 | |
0ab6803b TG |
3606 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3607 | if (nlh == NULL) | |
26932566 | 3608 | return -EMSGSIZE; |
85486af0 | 3609 | |
0ab6803b TG |
3610 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3611 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3612 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3613 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3614 | nlmsg_cancel(skb, nlh); | |
3615 | return -EMSGSIZE; | |
3616 | } | |
85486af0 | 3617 | |
0ab6803b | 3618 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3619 | } |
3620 | ||
3621 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3622 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3623 | { |
1da177e4 | 3624 | struct nlmsghdr *nlh; |
101bb229 TG |
3625 | u8 scope = RT_SCOPE_UNIVERSE; |
3626 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3627 | ||
3628 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3629 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3630 | |
0ab6803b TG |
3631 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3632 | if (nlh == NULL) | |
26932566 | 3633 | return -EMSGSIZE; |
85486af0 | 3634 | |
0ab6803b TG |
3635 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3636 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3637 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3638 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3639 | nlmsg_cancel(skb, nlh); | |
3640 | return -EMSGSIZE; | |
3641 | } | |
1da177e4 | 3642 | |
0ab6803b | 3643 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3644 | } |
3645 | ||
e21e8467 | 3646 | enum addr_type_t { |
1da177e4 LT |
3647 | UNICAST_ADDR, |
3648 | MULTICAST_ADDR, | |
3649 | ANYCAST_ADDR, | |
3650 | }; | |
3651 | ||
234b27c3 ED |
3652 | /* called with rcu_read_lock() */ |
3653 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3654 | struct netlink_callback *cb, enum addr_type_t type, | |
3655 | int s_ip_idx, int *p_ip_idx) | |
3656 | { | |
234b27c3 ED |
3657 | struct ifmcaddr6 *ifmca; |
3658 | struct ifacaddr6 *ifaca; | |
3659 | int err = 1; | |
3660 | int ip_idx = *p_ip_idx; | |
3661 | ||
3662 | read_lock_bh(&idev->lock); | |
3663 | switch (type) { | |
502a2ffd | 3664 | case UNICAST_ADDR: { |
3665 | struct inet6_ifaddr *ifa; | |
3666 | ||
234b27c3 | 3667 | /* unicast address incl. temp addr */ |
502a2ffd | 3668 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3669 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3670 | continue; |
3671 | err = inet6_fill_ifaddr(skb, ifa, | |
3672 | NETLINK_CB(cb->skb).pid, | |
3673 | cb->nlh->nlmsg_seq, | |
3674 | RTM_NEWADDR, | |
3675 | NLM_F_MULTI); | |
3676 | if (err <= 0) | |
3677 | break; | |
3678 | } | |
3679 | break; | |
502a2ffd | 3680 | } |
234b27c3 ED |
3681 | case MULTICAST_ADDR: |
3682 | /* multicast address */ | |
3683 | for (ifmca = idev->mc_list; ifmca; | |
3684 | ifmca = ifmca->next, ip_idx++) { | |
3685 | if (ip_idx < s_ip_idx) | |
3686 | continue; | |
3687 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
3688 | NETLINK_CB(cb->skb).pid, | |
3689 | cb->nlh->nlmsg_seq, | |
3690 | RTM_GETMULTICAST, | |
3691 | NLM_F_MULTI); | |
3692 | if (err <= 0) | |
3693 | break; | |
3694 | } | |
3695 | break; | |
3696 | case ANYCAST_ADDR: | |
3697 | /* anycast address */ | |
3698 | for (ifaca = idev->ac_list; ifaca; | |
3699 | ifaca = ifaca->aca_next, ip_idx++) { | |
3700 | if (ip_idx < s_ip_idx) | |
3701 | continue; | |
3702 | err = inet6_fill_ifacaddr(skb, ifaca, | |
3703 | NETLINK_CB(cb->skb).pid, | |
3704 | cb->nlh->nlmsg_seq, | |
3705 | RTM_GETANYCAST, | |
3706 | NLM_F_MULTI); | |
3707 | if (err <= 0) | |
3708 | break; | |
3709 | } | |
3710 | break; | |
3711 | default: | |
3712 | break; | |
3713 | } | |
3714 | read_unlock_bh(&idev->lock); | |
3715 | *p_ip_idx = ip_idx; | |
3716 | return err; | |
3717 | } | |
3718 | ||
1da177e4 LT |
3719 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3720 | enum addr_type_t type) | |
3721 | { | |
234b27c3 ED |
3722 | struct net *net = sock_net(skb->sk); |
3723 | int h, s_h; | |
1da177e4 LT |
3724 | int idx, ip_idx; |
3725 | int s_idx, s_ip_idx; | |
1da177e4 | 3726 | struct net_device *dev; |
234b27c3 ED |
3727 | struct inet6_dev *idev; |
3728 | struct hlist_head *head; | |
3729 | struct hlist_node *node; | |
1ab1457c | 3730 | |
234b27c3 ED |
3731 | s_h = cb->args[0]; |
3732 | s_idx = idx = cb->args[1]; | |
3733 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3734 | |
234b27c3 ED |
3735 | rcu_read_lock(); |
3736 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3737 | idx = 0; | |
3738 | head = &net->dev_index_head[h]; | |
3739 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3740 | if (idx < s_idx) | |
3741 | goto cont; | |
4b97efdf | 3742 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
3743 | s_ip_idx = 0; |
3744 | ip_idx = 0; | |
e21e8467 SH |
3745 | idev = __in6_dev_get(dev); |
3746 | if (!idev) | |
234b27c3 ED |
3747 | goto cont; |
3748 | ||
3749 | if (in6_dump_addrs(idev, skb, cb, type, | |
3750 | s_ip_idx, &ip_idx) <= 0) | |
3751 | goto done; | |
7562f876 | 3752 | cont: |
234b27c3 ED |
3753 | idx++; |
3754 | } | |
1da177e4 | 3755 | } |
234b27c3 ED |
3756 | done: |
3757 | rcu_read_unlock(); | |
3758 | cb->args[0] = h; | |
3759 | cb->args[1] = idx; | |
3760 | cb->args[2] = ip_idx; | |
3761 | ||
1da177e4 LT |
3762 | return skb->len; |
3763 | } | |
3764 | ||
3765 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3766 | { | |
3767 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3768 | |
1da177e4 LT |
3769 | return inet6_dump_addr(skb, cb, type); |
3770 | } | |
3771 | ||
3772 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3773 | { | |
3774 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3775 | |
1da177e4 LT |
3776 | return inet6_dump_addr(skb, cb, type); |
3777 | } | |
3778 | ||
3779 | ||
3780 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3781 | { | |
3782 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3783 | |
1da177e4 LT |
3784 | return inet6_dump_addr(skb, cb, type); |
3785 | } | |
3786 | ||
8e5e8f30 | 3787 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
1b29fc2c | 3788 | void *arg) |
6c223828 | 3789 | { |
3b1e0a65 | 3790 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3791 | struct ifaddrmsg *ifm; |
3792 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3793 | struct in6_addr *addr = NULL; |
3794 | struct net_device *dev = NULL; | |
3795 | struct inet6_ifaddr *ifa; | |
3796 | struct sk_buff *skb; | |
6c223828 NT |
3797 | int err; |
3798 | ||
1b29fc2c TG |
3799 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3800 | if (err < 0) | |
3801 | goto errout; | |
3802 | ||
3803 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3804 | if (addr == NULL) { | |
3805 | err = -EINVAL; | |
3806 | goto errout; | |
6c223828 | 3807 | } |
6c223828 | 3808 | |
1b29fc2c | 3809 | ifm = nlmsg_data(nlh); |
6c223828 | 3810 | if (ifm->ifa_index) |
6fda7350 | 3811 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3812 | |
e21e8467 SH |
3813 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
3814 | if (!ifa) { | |
1b29fc2c TG |
3815 | err = -EADDRNOTAVAIL; |
3816 | goto errout; | |
3817 | } | |
6c223828 | 3818 | |
e21e8467 SH |
3819 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
3820 | if (!skb) { | |
6c223828 | 3821 | err = -ENOBUFS; |
1b29fc2c | 3822 | goto errout_ifa; |
6c223828 NT |
3823 | } |
3824 | ||
6c223828 NT |
3825 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3826 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3827 | if (err < 0) { |
3828 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3829 | WARN_ON(err == -EMSGSIZE); | |
3830 | kfree_skb(skb); | |
3831 | goto errout_ifa; | |
3832 | } | |
6fda7350 | 3833 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3834 | errout_ifa: |
6c223828 | 3835 | in6_ifa_put(ifa); |
1b29fc2c | 3836 | errout: |
6c223828 | 3837 | return err; |
6c223828 NT |
3838 | } |
3839 | ||
1da177e4 LT |
3840 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3841 | { | |
3842 | struct sk_buff *skb; | |
c346dca1 | 3843 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3844 | int err = -ENOBUFS; |
1da177e4 | 3845 | |
0ab6803b | 3846 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3847 | if (skb == NULL) |
3848 | goto errout; | |
3849 | ||
3850 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3851 | if (err < 0) { |
3852 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3853 | WARN_ON(err == -EMSGSIZE); | |
3854 | kfree_skb(skb); | |
3855 | goto errout; | |
3856 | } | |
1ce85fe4 PNA |
3857 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3858 | return; | |
5d620266 TG |
3859 | errout: |
3860 | if (err < 0) | |
6fda7350 | 3861 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3862 | } |
3863 | ||
b6f99a21 | 3864 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3865 | __s32 *array, int bytes) |
3866 | { | |
04561c1f TG |
3867 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3868 | ||
1da177e4 LT |
3869 | memset(array, 0, bytes); |
3870 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3871 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3872 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3873 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3874 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3875 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3876 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3877 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
3878 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
3879 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
3880 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
3881 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 LT |
3882 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
3883 | #ifdef CONFIG_IPV6_PRIVACY | |
3884 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3885 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3886 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3887 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3888 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3889 | #endif | |
3890 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3891 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3892 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3893 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3894 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
3895 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
3896 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 3897 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3898 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3899 | #endif | |
930d6ff2 | 3900 | #endif |
fbea49e1 | 3901 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3902 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3903 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3904 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3905 | #endif | |
7bc570c8 YH |
3906 | #ifdef CONFIG_IPV6_MROUTE |
3907 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3908 | #endif | |
778d80be | 3909 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3910 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 3911 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4 LT |
3912 | } |
3913 | ||
b382b191 TG |
3914 | static inline size_t inet6_ifla6_size(void) |
3915 | { | |
3916 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3917 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3918 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3919 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
3920 | + nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */ | |
3921 | } | |
3922 | ||
339bf98f TG |
3923 | static inline size_t inet6_if_nlmsg_size(void) |
3924 | { | |
3925 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3926 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3927 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3928 | + nla_total_size(4) /* IFLA_MTU */ | |
3929 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 3930 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 3931 | } |
c5396a31 | 3932 | |
be281e55 | 3933 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 3934 | int items, int bytes) |
7f7d9a6b HX |
3935 | { |
3936 | int i; | |
3937 | int pad = bytes - sizeof(u64) * items; | |
3938 | BUG_ON(pad < 0); | |
3939 | ||
3940 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3941 | put_unaligned(items, &stats[0]); | |
3942 | for (i = 1; i < items; i++) | |
be281e55 | 3943 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
3944 | |
3945 | memset(&stats[items], 0, pad); | |
3946 | } | |
3947 | ||
4ce3c183 ED |
3948 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
3949 | int items, int bytes, size_t syncpoff) | |
3950 | { | |
3951 | int i; | |
3952 | int pad = bytes - sizeof(u64) * items; | |
3953 | BUG_ON(pad < 0); | |
3954 | ||
3955 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3956 | put_unaligned(items, &stats[0]); | |
3957 | for (i = 1; i < items; i++) | |
3958 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
3959 | ||
3960 | memset(&stats[items], 0, pad); | |
3961 | } | |
3962 | ||
7f7d9a6b HX |
3963 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
3964 | int bytes) | |
3965 | { | |
e21e8467 | 3966 | switch (attrtype) { |
7f7d9a6b | 3967 | case IFLA_INET6_STATS: |
4ce3c183 ED |
3968 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
3969 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
3970 | break; |
3971 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 3972 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
3973 | break; |
3974 | } | |
3975 | } | |
3976 | ||
b382b191 TG |
3977 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
3978 | { | |
3979 | struct nlattr *nla; | |
3980 | struct ifla_cacheinfo ci; | |
3981 | ||
c78679e8 DM |
3982 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
3983 | goto nla_put_failure; | |
b382b191 | 3984 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
3985 | ci.tstamp = cstamp_delta(idev->tstamp); |
3986 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
3987 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); | |
c78679e8 DM |
3988 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
3989 | goto nla_put_failure; | |
b382b191 TG |
3990 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3991 | if (nla == NULL) | |
3992 | goto nla_put_failure; | |
3993 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
3994 | ||
3995 | /* XXX - MC not implemented */ | |
3996 | ||
3997 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
3998 | if (nla == NULL) | |
3999 | goto nla_put_failure; | |
4000 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4001 | ||
4002 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4003 | if (nla == NULL) | |
4004 | goto nla_put_failure; | |
4005 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4006 | ||
4007 | return 0; | |
4008 | ||
4009 | nla_put_failure: | |
4010 | return -EMSGSIZE; | |
4011 | } | |
4012 | ||
4013 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4014 | { | |
4015 | if (!__in6_dev_get(dev)) | |
4016 | return 0; | |
4017 | ||
4018 | return inet6_ifla6_size(); | |
4019 | } | |
4020 | ||
4021 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4022 | { | |
4023 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4024 | ||
4025 | if (!idev) | |
4026 | return -ENODATA; | |
4027 | ||
4028 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4029 | return -EMSGSIZE; | |
4030 | ||
4031 | return 0; | |
4032 | } | |
4033 | ||
1ab1457c | 4034 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 4035 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4036 | { |
04561c1f | 4037 | struct net_device *dev = idev->dev; |
04561c1f TG |
4038 | struct ifinfomsg *hdr; |
4039 | struct nlmsghdr *nlh; | |
4040 | void *protoinfo; | |
04561c1f TG |
4041 | |
4042 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
4043 | if (nlh == NULL) | |
26932566 | 4044 | return -EMSGSIZE; |
04561c1f TG |
4045 | |
4046 | hdr = nlmsg_data(nlh); | |
4047 | hdr->ifi_family = AF_INET6; | |
4048 | hdr->__ifi_pad = 0; | |
4049 | hdr->ifi_type = dev->type; | |
4050 | hdr->ifi_index = dev->ifindex; | |
4051 | hdr->ifi_flags = dev_get_flags(dev); | |
4052 | hdr->ifi_change = 0; | |
4053 | ||
c78679e8 DM |
4054 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4055 | (dev->addr_len && | |
4056 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4057 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4058 | (dev->ifindex != dev->iflink && | |
4059 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4060 | goto nla_put_failure; | |
04561c1f TG |
4061 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4062 | if (protoinfo == NULL) | |
4063 | goto nla_put_failure; | |
1da177e4 | 4064 | |
b382b191 | 4065 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4066 | goto nla_put_failure; |
1da177e4 | 4067 | |
04561c1f TG |
4068 | nla_nest_end(skb, protoinfo); |
4069 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4070 | |
04561c1f | 4071 | nla_put_failure: |
26932566 PM |
4072 | nlmsg_cancel(skb, nlh); |
4073 | return -EMSGSIZE; | |
1da177e4 LT |
4074 | } |
4075 | ||
4076 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4077 | { | |
3b1e0a65 | 4078 | struct net *net = sock_net(skb->sk); |
84d2697d | 4079 | int h, s_h; |
434a8a58 | 4080 | int idx = 0, s_idx; |
1da177e4 LT |
4081 | struct net_device *dev; |
4082 | struct inet6_dev *idev; | |
84d2697d ED |
4083 | struct hlist_head *head; |
4084 | struct hlist_node *node; | |
1da177e4 | 4085 | |
84d2697d ED |
4086 | s_h = cb->args[0]; |
4087 | s_idx = cb->args[1]; | |
4088 | ||
4089 | rcu_read_lock(); | |
4090 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4091 | idx = 0; | |
4092 | head = &net->dev_index_head[h]; | |
4093 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
4094 | if (idx < s_idx) | |
4095 | goto cont; | |
4096 | idev = __in6_dev_get(dev); | |
4097 | if (!idev) | |
4098 | goto cont; | |
4099 | if (inet6_fill_ifinfo(skb, idev, | |
4100 | NETLINK_CB(cb->skb).pid, | |
4101 | cb->nlh->nlmsg_seq, | |
4102 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4103 | goto out; | |
7562f876 | 4104 | cont: |
84d2697d ED |
4105 | idx++; |
4106 | } | |
1da177e4 | 4107 | } |
84d2697d ED |
4108 | out: |
4109 | rcu_read_unlock(); | |
4110 | cb->args[1] = idx; | |
4111 | cb->args[0] = h; | |
1da177e4 LT |
4112 | |
4113 | return skb->len; | |
4114 | } | |
4115 | ||
4116 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4117 | { | |
4118 | struct sk_buff *skb; | |
c346dca1 | 4119 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4120 | int err = -ENOBUFS; |
1ab1457c | 4121 | |
339bf98f | 4122 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4123 | if (skb == NULL) |
4124 | goto errout; | |
4125 | ||
4126 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4127 | if (err < 0) { |
4128 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4129 | WARN_ON(err == -EMSGSIZE); | |
4130 | kfree_skb(skb); | |
4131 | goto errout; | |
4132 | } | |
5f75a104 | 4133 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4134 | return; |
8d7a76c9 TG |
4135 | errout: |
4136 | if (err < 0) | |
5f75a104 | 4137 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4138 | } |
4139 | ||
339bf98f TG |
4140 | static inline size_t inet6_prefix_nlmsg_size(void) |
4141 | { | |
4142 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4143 | + nla_total_size(sizeof(struct in6_addr)) | |
4144 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4145 | } | |
c5396a31 | 4146 | |
1da177e4 | 4147 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
4148 | struct prefix_info *pinfo, u32 pid, u32 seq, |
4149 | int event, unsigned int flags) | |
1da177e4 | 4150 | { |
6051e2f4 TG |
4151 | struct prefixmsg *pmsg; |
4152 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4153 | struct prefix_cacheinfo ci; |
4154 | ||
6051e2f4 TG |
4155 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
4156 | if (nlh == NULL) | |
26932566 | 4157 | return -EMSGSIZE; |
6051e2f4 TG |
4158 | |
4159 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4160 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4161 | pmsg->prefix_pad1 = 0; |
4162 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4163 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4164 | pmsg->prefix_len = pinfo->prefix_len; | |
4165 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4166 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4167 | pmsg->prefix_flags = 0; |
4168 | if (pinfo->onlink) | |
4169 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4170 | if (pinfo->autoconf) | |
4171 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4172 | ||
c78679e8 DM |
4173 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4174 | goto nla_put_failure; | |
1da177e4 LT |
4175 | ci.preferred_time = ntohl(pinfo->prefered); |
4176 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4177 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4178 | goto nla_put_failure; | |
6051e2f4 | 4179 | return nlmsg_end(skb, nlh); |
1da177e4 | 4180 | |
6051e2f4 | 4181 | nla_put_failure: |
26932566 PM |
4182 | nlmsg_cancel(skb, nlh); |
4183 | return -EMSGSIZE; | |
1da177e4 LT |
4184 | } |
4185 | ||
1ab1457c | 4186 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4187 | struct prefix_info *pinfo) |
4188 | { | |
4189 | struct sk_buff *skb; | |
c346dca1 | 4190 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4191 | int err = -ENOBUFS; |
1da177e4 | 4192 | |
339bf98f | 4193 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4194 | if (skb == NULL) |
4195 | goto errout; | |
4196 | ||
4197 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4198 | if (err < 0) { |
4199 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4200 | WARN_ON(err == -EMSGSIZE); | |
4201 | kfree_skb(skb); | |
4202 | goto errout; | |
4203 | } | |
1ce85fe4 PNA |
4204 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4205 | return; | |
8c384bfa TG |
4206 | errout: |
4207 | if (err < 0) | |
6fda7350 | 4208 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4209 | } |
4210 | ||
1da177e4 LT |
4211 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4212 | { | |
4213 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4214 | ||
4215 | switch (event) { | |
4216 | case RTM_NEWADDR: | |
95c385b4 NH |
4217 | /* |
4218 | * If the address was optimistic | |
4219 | * we inserted the route at the start of | |
4220 | * our DAD process, so we don't need | |
4221 | * to do it again | |
4222 | */ | |
4223 | if (!(ifp->rt->rt6i_node)) | |
4224 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4225 | if (ifp->idev->cnf.forwarding) |
4226 | addrconf_join_anycast(ifp); | |
4227 | break; | |
4228 | case RTM_DELADDR: | |
4229 | if (ifp->idev->cnf.forwarding) | |
4230 | addrconf_leave_anycast(ifp); | |
4231 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
d8d1f30b | 4232 | dst_hold(&ifp->rt->dst); |
93fa159a | 4233 | |
73a8bd74 | 4234 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4235 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4236 | break; |
4237 | } | |
4238 | } | |
4239 | ||
4240 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4241 | { | |
8814c4b5 | 4242 | rcu_read_lock_bh(); |
1da177e4 LT |
4243 | if (likely(ifp->idev->dead == 0)) |
4244 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4245 | rcu_read_unlock_bh(); |
1da177e4 LT |
4246 | } |
4247 | ||
4248 | #ifdef CONFIG_SYSCTL | |
4249 | ||
4250 | static | |
8d65af78 | 4251 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4252 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4253 | { | |
4254 | int *valp = ctl->data; | |
4255 | int val = *valp; | |
88af182e | 4256 | loff_t pos = *ppos; |
013d97e9 | 4257 | ctl_table lctl; |
1da177e4 LT |
4258 | int ret; |
4259 | ||
013d97e9 FR |
4260 | /* |
4261 | * ctl->data points to idev->cnf.forwarding, we should | |
4262 | * not modify it until we get the rtnl lock. | |
4263 | */ | |
4264 | lctl = *ctl; | |
4265 | lctl.data = &val; | |
4266 | ||
4267 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4268 | |
c8fecf22 | 4269 | if (write) |
b325fddb | 4270 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4271 | if (ret) |
4272 | *ppos = pos; | |
1ab1457c | 4273 | return ret; |
1da177e4 LT |
4274 | } |
4275 | ||
56d417b1 BH |
4276 | static void dev_disable_change(struct inet6_dev *idev) |
4277 | { | |
4278 | if (!idev || !idev->dev) | |
4279 | return; | |
4280 | ||
4281 | if (idev->cnf.disable_ipv6) | |
4282 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4283 | else | |
4284 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4285 | } | |
4286 | ||
4287 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4288 | { | |
4289 | struct net_device *dev; | |
4290 | struct inet6_dev *idev; | |
4291 | ||
c6d14c84 ED |
4292 | rcu_read_lock(); |
4293 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4294 | idev = __in6_dev_get(dev); |
4295 | if (idev) { | |
4296 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4297 | idev->cnf.disable_ipv6 = newf; | |
4298 | if (changed) | |
4299 | dev_disable_change(idev); | |
4300 | } | |
56d417b1 | 4301 | } |
c6d14c84 | 4302 | rcu_read_unlock(); |
56d417b1 BH |
4303 | } |
4304 | ||
013d97e9 | 4305 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4306 | { |
4307 | struct net *net; | |
013d97e9 FR |
4308 | int old; |
4309 | ||
4310 | if (!rtnl_trylock()) | |
4311 | return restart_syscall(); | |
56d417b1 BH |
4312 | |
4313 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4314 | old = *p; |
4315 | *p = newf; | |
56d417b1 | 4316 | |
013d97e9 FR |
4317 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4318 | rtnl_unlock(); | |
56d417b1 | 4319 | return 0; |
88af182e | 4320 | } |
56d417b1 BH |
4321 | |
4322 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4323 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4324 | addrconf_disable_change(net, newf); | |
013d97e9 | 4325 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4326 | dev_disable_change((struct inet6_dev *)table->extra1); |
4327 | ||
4328 | rtnl_unlock(); | |
4329 | return 0; | |
4330 | } | |
4331 | ||
4332 | static | |
8d65af78 | 4333 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4334 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4335 | { | |
4336 | int *valp = ctl->data; | |
4337 | int val = *valp; | |
88af182e | 4338 | loff_t pos = *ppos; |
013d97e9 | 4339 | ctl_table lctl; |
56d417b1 BH |
4340 | int ret; |
4341 | ||
013d97e9 FR |
4342 | /* |
4343 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4344 | * not modify it until we get the rtnl lock. | |
4345 | */ | |
4346 | lctl = *ctl; | |
4347 | lctl.data = &val; | |
4348 | ||
4349 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4350 | |
4351 | if (write) | |
4352 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4353 | if (ret) |
4354 | *ppos = pos; | |
56d417b1 BH |
4355 | return ret; |
4356 | } | |
4357 | ||
1da177e4 LT |
4358 | static struct addrconf_sysctl_table |
4359 | { | |
4360 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4361 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4362 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4363 | .sysctl_header = NULL, |
4364 | .addrconf_vars = { | |
1ab1457c | 4365 | { |
e21e8467 SH |
4366 | .procname = "forwarding", |
4367 | .data = &ipv6_devconf.forwarding, | |
4368 | .maxlen = sizeof(int), | |
4369 | .mode = 0644, | |
4370 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4371 | }, |
4372 | { | |
e21e8467 SH |
4373 | .procname = "hop_limit", |
4374 | .data = &ipv6_devconf.hop_limit, | |
4375 | .maxlen = sizeof(int), | |
4376 | .mode = 0644, | |
4377 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4378 | }, |
4379 | { | |
e21e8467 SH |
4380 | .procname = "mtu", |
4381 | .data = &ipv6_devconf.mtu6, | |
4382 | .maxlen = sizeof(int), | |
4383 | .mode = 0644, | |
4384 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4385 | }, |
4386 | { | |
e21e8467 SH |
4387 | .procname = "accept_ra", |
4388 | .data = &ipv6_devconf.accept_ra, | |
4389 | .maxlen = sizeof(int), | |
4390 | .mode = 0644, | |
4391 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4392 | }, |
4393 | { | |
e21e8467 SH |
4394 | .procname = "accept_redirects", |
4395 | .data = &ipv6_devconf.accept_redirects, | |
4396 | .maxlen = sizeof(int), | |
4397 | .mode = 0644, | |
4398 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4399 | }, |
4400 | { | |
e21e8467 SH |
4401 | .procname = "autoconf", |
4402 | .data = &ipv6_devconf.autoconf, | |
4403 | .maxlen = sizeof(int), | |
4404 | .mode = 0644, | |
4405 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4406 | }, |
4407 | { | |
e21e8467 SH |
4408 | .procname = "dad_transmits", |
4409 | .data = &ipv6_devconf.dad_transmits, | |
4410 | .maxlen = sizeof(int), | |
4411 | .mode = 0644, | |
4412 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4413 | }, |
4414 | { | |
e21e8467 SH |
4415 | .procname = "router_solicitations", |
4416 | .data = &ipv6_devconf.rtr_solicits, | |
4417 | .maxlen = sizeof(int), | |
4418 | .mode = 0644, | |
4419 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4420 | }, |
4421 | { | |
e21e8467 SH |
4422 | .procname = "router_solicitation_interval", |
4423 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4424 | .maxlen = sizeof(int), | |
4425 | .mode = 0644, | |
4426 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4427 | }, |
4428 | { | |
e21e8467 SH |
4429 | .procname = "router_solicitation_delay", |
4430 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4431 | .maxlen = sizeof(int), | |
4432 | .mode = 0644, | |
4433 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4434 | }, |
4435 | { | |
e21e8467 SH |
4436 | .procname = "force_mld_version", |
4437 | .data = &ipv6_devconf.force_mld_version, | |
4438 | .maxlen = sizeof(int), | |
4439 | .mode = 0644, | |
4440 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4441 | }, |
4442 | #ifdef CONFIG_IPV6_PRIVACY | |
4443 | { | |
e21e8467 SH |
4444 | .procname = "use_tempaddr", |
4445 | .data = &ipv6_devconf.use_tempaddr, | |
4446 | .maxlen = sizeof(int), | |
4447 | .mode = 0644, | |
4448 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4449 | }, |
4450 | { | |
e21e8467 SH |
4451 | .procname = "temp_valid_lft", |
4452 | .data = &ipv6_devconf.temp_valid_lft, | |
4453 | .maxlen = sizeof(int), | |
4454 | .mode = 0644, | |
4455 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4456 | }, |
4457 | { | |
e21e8467 SH |
4458 | .procname = "temp_prefered_lft", |
4459 | .data = &ipv6_devconf.temp_prefered_lft, | |
4460 | .maxlen = sizeof(int), | |
4461 | .mode = 0644, | |
4462 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4463 | }, |
4464 | { | |
e21e8467 SH |
4465 | .procname = "regen_max_retry", |
4466 | .data = &ipv6_devconf.regen_max_retry, | |
4467 | .maxlen = sizeof(int), | |
4468 | .mode = 0644, | |
4469 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4470 | }, |
4471 | { | |
e21e8467 SH |
4472 | .procname = "max_desync_factor", |
4473 | .data = &ipv6_devconf.max_desync_factor, | |
4474 | .maxlen = sizeof(int), | |
4475 | .mode = 0644, | |
4476 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4477 | }, |
4478 | #endif | |
4479 | { | |
e21e8467 SH |
4480 | .procname = "max_addresses", |
4481 | .data = &ipv6_devconf.max_addresses, | |
4482 | .maxlen = sizeof(int), | |
4483 | .mode = 0644, | |
4484 | .proc_handler = proc_dointvec, | |
1da177e4 | 4485 | }, |
65f5c7c1 | 4486 | { |
e21e8467 SH |
4487 | .procname = "accept_ra_defrtr", |
4488 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4489 | .maxlen = sizeof(int), | |
4490 | .mode = 0644, | |
4491 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4492 | }, |
c4fd30eb | 4493 | { |
e21e8467 SH |
4494 | .procname = "accept_ra_pinfo", |
4495 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4496 | .maxlen = sizeof(int), | |
4497 | .mode = 0644, | |
4498 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4499 | }, |
930d6ff2 YH |
4500 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4501 | { | |
e21e8467 SH |
4502 | .procname = "accept_ra_rtr_pref", |
4503 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4504 | .maxlen = sizeof(int), | |
4505 | .mode = 0644, | |
4506 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4507 | }, |
52e16356 | 4508 | { |
e21e8467 SH |
4509 | .procname = "router_probe_interval", |
4510 | .data = &ipv6_devconf.rtr_probe_interval, | |
4511 | .maxlen = sizeof(int), | |
4512 | .mode = 0644, | |
4513 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4514 | }, |
fa03ef38 | 4515 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4516 | { |
e21e8467 SH |
4517 | .procname = "accept_ra_rt_info_max_plen", |
4518 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4519 | .maxlen = sizeof(int), | |
4520 | .mode = 0644, | |
4521 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4522 | }, |
4523 | #endif | |
930d6ff2 | 4524 | #endif |
fbea49e1 | 4525 | { |
e21e8467 SH |
4526 | .procname = "proxy_ndp", |
4527 | .data = &ipv6_devconf.proxy_ndp, | |
4528 | .maxlen = sizeof(int), | |
4529 | .mode = 0644, | |
4530 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4531 | }, |
0bcbc926 | 4532 | { |
e21e8467 SH |
4533 | .procname = "accept_source_route", |
4534 | .data = &ipv6_devconf.accept_source_route, | |
4535 | .maxlen = sizeof(int), | |
4536 | .mode = 0644, | |
4537 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4538 | }, |
95c385b4 NH |
4539 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4540 | { | |
e21e8467 SH |
4541 | .procname = "optimistic_dad", |
4542 | .data = &ipv6_devconf.optimistic_dad, | |
4543 | .maxlen = sizeof(int), | |
4544 | .mode = 0644, | |
4545 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4546 | |
4547 | }, | |
7bc570c8 YH |
4548 | #endif |
4549 | #ifdef CONFIG_IPV6_MROUTE | |
4550 | { | |
e21e8467 SH |
4551 | .procname = "mc_forwarding", |
4552 | .data = &ipv6_devconf.mc_forwarding, | |
4553 | .maxlen = sizeof(int), | |
4554 | .mode = 0444, | |
4555 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4556 | }, |
95c385b4 | 4557 | #endif |
778d80be | 4558 | { |
e21e8467 SH |
4559 | .procname = "disable_ipv6", |
4560 | .data = &ipv6_devconf.disable_ipv6, | |
4561 | .maxlen = sizeof(int), | |
4562 | .mode = 0644, | |
4563 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4564 | }, |
1b34be74 | 4565 | { |
e21e8467 SH |
4566 | .procname = "accept_dad", |
4567 | .data = &ipv6_devconf.accept_dad, | |
4568 | .maxlen = sizeof(int), | |
4569 | .mode = 0644, | |
4570 | .proc_handler = proc_dointvec, | |
1b34be74 | 4571 | }, |
f7734fdf | 4572 | { |
f7734fdf OP |
4573 | .procname = "force_tllao", |
4574 | .data = &ipv6_devconf.force_tllao, | |
4575 | .maxlen = sizeof(int), | |
4576 | .mode = 0644, | |
4577 | .proc_handler = proc_dointvec | |
4578 | }, | |
1da177e4 | 4579 | { |
f8572d8f | 4580 | /* sentinel */ |
1da177e4 LT |
4581 | } |
4582 | }, | |
1da177e4 LT |
4583 | }; |
4584 | ||
bff16c2f | 4585 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4586 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4587 | { |
4588 | int i; | |
1da177e4 | 4589 | struct addrconf_sysctl_table *t; |
6105e293 | 4590 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 4591 | |
af879cc7 | 4592 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4593 | if (t == NULL) |
f68635e6 PE |
4594 | goto out; |
4595 | ||
bcdd553f | 4596 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4597 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4598 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4599 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4600 | } |
1da177e4 | 4601 | |
6105e293 | 4602 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 4603 | |
6105e293 | 4604 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 4605 | if (t->sysctl_header == NULL) |
6105e293 | 4606 | goto free; |
f68635e6 PE |
4607 | |
4608 | p->sysctl = t; | |
95897312 | 4609 | return 0; |
1da177e4 | 4610 | |
f68635e6 | 4611 | free: |
1da177e4 | 4612 | kfree(t); |
f68635e6 | 4613 | out: |
95897312 | 4614 | return -ENOBUFS; |
1da177e4 LT |
4615 | } |
4616 | ||
408c4768 PE |
4617 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4618 | { | |
4619 | struct addrconf_sysctl_table *t; | |
4620 | ||
4621 | if (p->sysctl == NULL) | |
4622 | return; | |
4623 | ||
4624 | t = p->sysctl; | |
4625 | p->sysctl = NULL; | |
ff538818 | 4626 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
4627 | kfree(t); |
4628 | } | |
4629 | ||
f52295a9 PE |
4630 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4631 | { | |
54716e3b | 4632 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4633 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4634 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4635 | idev, &idev->cnf); |
f52295a9 PE |
4636 | } |
4637 | ||
408c4768 | 4638 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4639 | { |
408c4768 PE |
4640 | __addrconf_sysctl_unregister(&idev->cnf); |
4641 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4642 | } |
4643 | ||
4644 | ||
4645 | #endif | |
4646 | ||
2c8c1e72 | 4647 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4648 | { |
4649 | int err; | |
4650 | struct ipv6_devconf *all, *dflt; | |
4651 | ||
4652 | err = -ENOMEM; | |
4653 | all = &ipv6_devconf; | |
4654 | dflt = &ipv6_devconf_dflt; | |
4655 | ||
09ad9bc7 | 4656 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4657 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4658 | if (all == NULL) | |
4659 | goto err_alloc_all; | |
4660 | ||
4661 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4662 | if (dflt == NULL) | |
4663 | goto err_alloc_dflt; | |
56d417b1 BH |
4664 | } else { |
4665 | /* these will be inherited by all namespaces */ | |
4666 | dflt->autoconf = ipv6_defaults.autoconf; | |
4667 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4668 | } |
4669 | ||
4670 | net->ipv6.devconf_all = all; | |
4671 | net->ipv6.devconf_dflt = dflt; | |
4672 | ||
4673 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4674 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4675 | if (err < 0) |
4676 | goto err_reg_all; | |
4677 | ||
f8572d8f | 4678 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4679 | if (err < 0) |
4680 | goto err_reg_dflt; | |
4681 | #endif | |
4682 | return 0; | |
4683 | ||
4684 | #ifdef CONFIG_SYSCTL | |
4685 | err_reg_dflt: | |
4686 | __addrconf_sysctl_unregister(all); | |
4687 | err_reg_all: | |
4688 | kfree(dflt); | |
4689 | #endif | |
4690 | err_alloc_dflt: | |
4691 | kfree(all); | |
4692 | err_alloc_all: | |
4693 | return err; | |
4694 | } | |
4695 | ||
2c8c1e72 | 4696 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4697 | { |
4698 | #ifdef CONFIG_SYSCTL | |
4699 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4700 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4701 | #endif | |
09ad9bc7 | 4702 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4703 | kfree(net->ipv6.devconf_dflt); |
4704 | kfree(net->ipv6.devconf_all); | |
4705 | } | |
4706 | } | |
4707 | ||
4708 | static struct pernet_operations addrconf_ops = { | |
4709 | .init = addrconf_init_net, | |
4710 | .exit = addrconf_exit_net, | |
4711 | }; | |
4712 | ||
1da177e4 LT |
4713 | /* |
4714 | * Device notifier | |
4715 | */ | |
4716 | ||
4717 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4718 | { | |
1ab1457c | 4719 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 | 4720 | } |
7159039a YH |
4721 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4722 | ||
1da177e4 LT |
4723 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4724 | { | |
e21e8467 | 4725 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4 | 4726 | } |
7159039a YH |
4727 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4728 | ||
b382b191 TG |
4729 | static struct rtnl_af_ops inet6_ops = { |
4730 | .family = AF_INET6, | |
4731 | .fill_link_af = inet6_fill_link_af, | |
4732 | .get_link_af_size = inet6_get_link_af_size, | |
b382b191 TG |
4733 | }; |
4734 | ||
1da177e4 LT |
4735 | /* |
4736 | * Init / cleanup code | |
4737 | */ | |
4738 | ||
4739 | int __init addrconf_init(void) | |
4740 | { | |
c2e21293 | 4741 | int i, err; |
2a8cc6c8 | 4742 | |
e21e8467 SH |
4743 | err = ipv6_addr_label_init(); |
4744 | if (err < 0) { | |
f3213831 JP |
4745 | pr_crit("%s: cannot initialize default policy table: %d\n", |
4746 | __func__, err); | |
2cc6d2bf | 4747 | goto out; |
2a8cc6c8 | 4748 | } |
1da177e4 | 4749 | |
2cc6d2bf NH |
4750 | err = register_pernet_subsys(&addrconf_ops); |
4751 | if (err < 0) | |
4752 | goto out_addrlabel; | |
e0da5a48 | 4753 | |
1da177e4 LT |
4754 | /* The addrconf netdev notifier requires that loopback_dev |
4755 | * has it's ipv6 private information allocated and setup | |
4756 | * before it can bring up and give link-local addresses | |
4757 | * to other devices which are up. | |
4758 | * | |
4759 | * Unfortunately, loopback_dev is not necessarily the first | |
4760 | * entry in the global dev_base list of net devices. In fact, | |
4761 | * it is likely to be the very last entry on that list. | |
4762 | * So this causes the notifier registry below to try and | |
4763 | * give link-local addresses to all devices besides loopback_dev | |
4764 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4765 | * devices to fail to get a link-local address. | |
4766 | * | |
4767 | * So, as a temporary fix, allocate the ipv6 structure for | |
4768 | * loopback_dev first by hand. | |
4769 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4770 | * device and it being up should be removed. | |
4771 | */ | |
4772 | rtnl_lock(); | |
2774c7ab | 4773 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4774 | err = -ENOMEM; |
4775 | rtnl_unlock(); | |
4776 | if (err) | |
e0da5a48 | 4777 | goto errlo; |
1da177e4 | 4778 | |
c2e21293 | 4779 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4780 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
4781 | ||
1da177e4 LT |
4782 | register_netdevice_notifier(&ipv6_dev_notf); |
4783 | ||
1da177e4 | 4784 | addrconf_verify(0); |
c127ea2c | 4785 | |
b382b191 TG |
4786 | err = rtnl_af_register(&inet6_ops); |
4787 | if (err < 0) | |
4788 | goto errout_af; | |
4789 | ||
c7ac8679 GR |
4790 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
4791 | NULL); | |
c127ea2c TG |
4792 | if (err < 0) |
4793 | goto errout; | |
4794 | ||
4795 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
4796 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
4797 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
4798 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
4799 | inet6_dump_ifaddr, NULL); | |
4800 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
4801 | inet6_dump_ifmcaddr, NULL); | |
4802 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
4803 | inet6_dump_ifacaddr, NULL); | |
c127ea2c | 4804 | |
2a8cc6c8 YH |
4805 | ipv6_addr_label_rtnl_register(); |
4806 | ||
1da177e4 | 4807 | return 0; |
c127ea2c | 4808 | errout: |
b382b191 TG |
4809 | rtnl_af_unregister(&inet6_ops); |
4810 | errout_af: | |
c127ea2c | 4811 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 PE |
4812 | errlo: |
4813 | unregister_pernet_subsys(&addrconf_ops); | |
2cc6d2bf NH |
4814 | out_addrlabel: |
4815 | ipv6_addr_label_cleanup(); | |
4816 | out: | |
c127ea2c | 4817 | return err; |
1da177e4 LT |
4818 | } |
4819 | ||
09f7709f | 4820 | void addrconf_cleanup(void) |
1da177e4 | 4821 | { |
176c39af | 4822 | struct net_device *dev; |
1da177e4 LT |
4823 | int i; |
4824 | ||
4825 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4826 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 4827 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
4828 | |
4829 | rtnl_lock(); | |
4830 | ||
b382b191 TG |
4831 | __rtnl_af_unregister(&inet6_ops); |
4832 | ||
176c39af DL |
4833 | /* clean dev list */ |
4834 | for_each_netdev(&init_net, dev) { | |
4835 | if (__in6_dev_get(dev) == NULL) | |
4836 | continue; | |
4837 | addrconf_ifdown(dev, 1); | |
4838 | } | |
4839 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4840 | ||
1da177e4 LT |
4841 | /* |
4842 | * Check hash table. | |
4843 | */ | |
5c578aed | 4844 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 4845 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4846 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 4847 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
4848 | |
4849 | del_timer(&addr_chk_timer); | |
1da177e4 | 4850 | rtnl_unlock(); |
1da177e4 | 4851 | } |