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 | ||
4acd4945 | 497 | for_each_netdev(net, dev) { |
1da177e4 LT |
498 | idev = __in6_dev_get(dev); |
499 | if (idev) { | |
e186932b PE |
500 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
501 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
502 | if (changed) |
503 | dev_forward_change(idev); | |
504 | } | |
1da177e4 | 505 | } |
1da177e4 | 506 | } |
c8fecf22 | 507 | |
013d97e9 | 508 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 509 | { |
bff16c2f | 510 | struct net *net; |
013d97e9 FR |
511 | int old; |
512 | ||
513 | if (!rtnl_trylock()) | |
514 | return restart_syscall(); | |
bff16c2f PE |
515 | |
516 | net = (struct net *)table->extra2; | |
013d97e9 FR |
517 | old = *p; |
518 | *p = newf; | |
b325fddb | 519 | |
013d97e9 FR |
520 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
521 | rtnl_unlock(); | |
522 | return 0; | |
88af182e | 523 | } |
c8fecf22 | 524 | |
e186932b | 525 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
526 | net->ipv6.devconf_dflt->forwarding = newf; |
527 | addrconf_forward_change(net, newf); | |
013d97e9 | 528 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 529 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 530 | rtnl_unlock(); |
c8fecf22 | 531 | |
013d97e9 | 532 | if (newf) |
7b4da532 | 533 | rt6_purge_dflt_routers(net); |
b325fddb | 534 | return 1; |
c8fecf22 | 535 | } |
1da177e4 LT |
536 | #endif |
537 | ||
5c578aed | 538 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
539 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
540 | { | |
c2e21293 | 541 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 542 | |
1da177e4 | 543 | #ifdef NET_REFCNT_DEBUG |
91df42be | 544 | pr_debug("%s\n", __func__); |
1da177e4 LT |
545 | #endif |
546 | ||
547 | in6_dev_put(ifp->idev); | |
548 | ||
549 | if (del_timer(&ifp->timer)) | |
e21e8467 | 550 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 | 551 | |
e9d3e084 | 552 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 553 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
554 | return; |
555 | } | |
d8d1f30b | 556 | dst_release(&ifp->rt->dst); |
1da177e4 | 557 | |
e5785985 | 558 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
559 | } |
560 | ||
e55ffac6 BH |
561 | static void |
562 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
563 | { | |
502a2ffd | 564 | struct list_head *p; |
8a6ce0c0 | 565 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
566 | |
567 | /* | |
568 | * Each device address list is sorted in order of scope - | |
569 | * global before linklocal. | |
570 | */ | |
502a2ffd | 571 | list_for_each(p, &idev->addr_list) { |
572 | struct inet6_ifaddr *ifa | |
573 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 574 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
575 | break; |
576 | } | |
577 | ||
b54c9b98 | 578 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
579 | } |
580 | ||
ddbe5032 | 581 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 582 | { |
ddbe5032 | 583 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
584 | } |
585 | ||
1da177e4 LT |
586 | /* On success it returns ifp with increased reference count */ |
587 | ||
588 | static struct inet6_ifaddr * | |
589 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 590 | int scope, u32 flags) |
1da177e4 LT |
591 | { |
592 | struct inet6_ifaddr *ifa = NULL; | |
593 | struct rt6_info *rt; | |
3a88a81d | 594 | unsigned int hash; |
1da177e4 | 595 | int err = 0; |
d68b8270 YH |
596 | int addr_type = ipv6_addr_type(addr); |
597 | ||
598 | if (addr_type == IPV6_ADDR_ANY || | |
599 | addr_type & IPV6_ADDR_MULTICAST || | |
600 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
601 | addr_type & IPV6_ADDR_LOOPBACK)) | |
602 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 603 | |
8814c4b5 | 604 | rcu_read_lock_bh(); |
1da177e4 LT |
605 | if (idev->dead) { |
606 | err = -ENODEV; /*XXX*/ | |
607 | goto out2; | |
608 | } | |
609 | ||
56d417b1 | 610 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
611 | err = -EACCES; |
612 | goto out2; | |
613 | } | |
614 | ||
5c578aed | 615 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
616 | |
617 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 618 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
619 | ADBG(("ipv6_add_addr: already assigned\n")); |
620 | err = -EEXIST; | |
621 | goto out; | |
622 | } | |
623 | ||
322f74a4 | 624 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
625 | |
626 | if (ifa == NULL) { | |
627 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
628 | err = -ENOBUFS; | |
629 | goto out; | |
630 | } | |
631 | ||
8f031519 | 632 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
633 | if (IS_ERR(rt)) { |
634 | err = PTR_ERR(rt); | |
635 | goto out; | |
636 | } | |
637 | ||
4e3fd7a0 | 638 | ifa->addr = *addr; |
1da177e4 LT |
639 | |
640 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 641 | spin_lock_init(&ifa->state_lock); |
1da177e4 | 642 | init_timer(&ifa->timer); |
c2e21293 | 643 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
644 | ifa->timer.data = (unsigned long) ifa; |
645 | ifa->scope = scope; | |
646 | ifa->prefix_len = pfxlen; | |
647 | ifa->flags = flags | IFA_F_TENTATIVE; | |
648 | ifa->cstamp = ifa->tstamp = jiffies; | |
649 | ||
57f5f544 KF |
650 | ifa->rt = rt; |
651 | ||
1da177e4 LT |
652 | ifa->idev = idev; |
653 | in6_dev_hold(idev); | |
654 | /* For caller */ | |
655 | in6_ifa_hold(ifa); | |
656 | ||
657 | /* Add to big hash table */ | |
ddbe5032 | 658 | hash = inet6_addr_hash(addr); |
1da177e4 | 659 | |
5c578aed | 660 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 661 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
662 | |
663 | write_lock(&idev->lock); | |
664 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 665 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
666 | |
667 | #ifdef CONFIG_IPV6_PRIVACY | |
668 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 669 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
670 | in6_ifa_hold(ifa); |
671 | } | |
672 | #endif | |
673 | ||
1da177e4 LT |
674 | in6_ifa_hold(ifa); |
675 | write_unlock(&idev->lock); | |
676 | out2: | |
8814c4b5 | 677 | rcu_read_unlock_bh(); |
1da177e4 | 678 | |
fd92833a | 679 | if (likely(err == 0)) |
e041c683 | 680 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
681 | else { |
682 | kfree(ifa); | |
683 | ifa = ERR_PTR(err); | |
684 | } | |
685 | ||
686 | return ifa; | |
687 | out: | |
5c578aed | 688 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
689 | goto out2; |
690 | } | |
691 | ||
692 | /* This function wants to get referenced ifp and releases it before return */ | |
693 | ||
694 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
695 | { | |
502a2ffd | 696 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 697 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 698 | int state; |
1da177e4 LT |
699 | int deleted = 0, onlink = 0; |
700 | unsigned long expires = jiffies; | |
701 | ||
4c5ff6a6 HX |
702 | spin_lock_bh(&ifp->state_lock); |
703 | state = ifp->state; | |
e9d3e084 | 704 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
705 | spin_unlock_bh(&ifp->state_lock); |
706 | ||
707 | if (state == INET6_IFADDR_STATE_DEAD) | |
708 | goto out; | |
1da177e4 | 709 | |
5c578aed | 710 | spin_lock_bh(&addrconf_hash_lock); |
711 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 712 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
713 | |
714 | write_lock_bh(&idev->lock); | |
715 | #ifdef CONFIG_IPV6_PRIVACY | |
716 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 717 | list_del(&ifp->tmp_list); |
718 | if (ifp->ifpub) { | |
719 | in6_ifa_put(ifp->ifpub); | |
720 | ifp->ifpub = NULL; | |
1da177e4 | 721 | } |
372e6c8f | 722 | __in6_ifa_put(ifp); |
1da177e4 LT |
723 | } |
724 | #endif | |
725 | ||
502a2ffd | 726 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 727 | if (ifa == ifp) { |
502a2ffd | 728 | list_del_init(&ifp->if_list); |
1da177e4 | 729 | __in6_ifa_put(ifp); |
502a2ffd | 730 | |
1da177e4 LT |
731 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
732 | break; | |
733 | deleted = 1; | |
1d142804 | 734 | continue; |
1da177e4 LT |
735 | } else if (ifp->flags & IFA_F_PERMANENT) { |
736 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
737 | ifp->prefix_len)) { | |
738 | if (ifa->flags & IFA_F_PERMANENT) { | |
739 | onlink = 1; | |
740 | if (deleted) | |
741 | break; | |
742 | } else { | |
743 | unsigned long lifetime; | |
744 | ||
745 | if (!onlink) | |
746 | onlink = -1; | |
747 | ||
748 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
749 | |
750 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
751 | /* | |
752 | * Note: Because this address is | |
753 | * not permanent, lifetime < | |
754 | * LONG_MAX / HZ here. | |
755 | */ | |
1da177e4 LT |
756 | if (time_before(expires, |
757 | ifa->tstamp + lifetime * HZ)) | |
758 | expires = ifa->tstamp + lifetime * HZ; | |
759 | spin_unlock(&ifa->lock); | |
760 | } | |
761 | } | |
762 | } | |
763 | } | |
764 | write_unlock_bh(&idev->lock); | |
765 | ||
b2238566 AV |
766 | addrconf_del_timer(ifp); |
767 | ||
1da177e4 LT |
768 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
769 | ||
e041c683 | 770 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 771 | |
1da177e4 LT |
772 | /* |
773 | * Purge or update corresponding prefix | |
774 | * | |
775 | * 1) we don't purge prefix here if address was not permanent. | |
776 | * prefix is managed by its own lifetime. | |
777 | * 2) if there're no addresses, delete prefix. | |
778 | * 3) if there're still other permanent address(es), | |
779 | * corresponding prefix is still permanent. | |
780 | * 4) otherwise, update prefix lifetime to the | |
781 | * longest valid lifetime among the corresponding | |
782 | * addresses on the device. | |
783 | * Note: subsequent RA will update lifetime. | |
784 | * | |
785 | * --yoshfuji | |
786 | */ | |
787 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
788 | struct in6_addr prefix; | |
789 | struct rt6_info *rt; | |
c346dca1 | 790 | struct net *net = dev_net(ifp->idev->dev); |
1da177e4 | 791 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda7350 | 792 | rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4 | 793 | |
2b5ead46 | 794 | if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4 | 795 | if (onlink == 0) { |
e0a1ad73 | 796 | ip6_del_rt(rt); |
1da177e4 LT |
797 | rt = NULL; |
798 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 799 | rt6_set_expires(rt, expires); |
1da177e4 LT |
800 | } |
801 | } | |
d8d1f30b | 802 | dst_release(&rt->dst); |
1da177e4 LT |
803 | } |
804 | ||
c3968a85 DW |
805 | /* clean up prefsrc entries */ |
806 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 807 | out: |
1da177e4 LT |
808 | in6_ifa_put(ifp); |
809 | } | |
810 | ||
811 | #ifdef CONFIG_IPV6_PRIVACY | |
812 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
813 | { | |
814 | struct inet6_dev *idev = ifp->idev; | |
815 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 816 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 817 | unsigned long regen_advance; |
1da177e4 LT |
818 | int tmp_plen; |
819 | int ret = 0; | |
820 | int max_addresses; | |
95c385b4 | 821 | u32 addr_flags; |
76f793e3 | 822 | unsigned long now = jiffies; |
1da177e4 LT |
823 | |
824 | write_lock(&idev->lock); | |
825 | if (ift) { | |
826 | spin_lock_bh(&ift->lock); | |
827 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
828 | spin_unlock_bh(&ift->lock); | |
829 | tmpaddr = &addr; | |
830 | } else { | |
831 | tmpaddr = NULL; | |
832 | } | |
833 | retry: | |
834 | in6_dev_hold(idev); | |
835 | if (idev->cnf.use_tempaddr <= 0) { | |
836 | write_unlock(&idev->lock); | |
f3213831 | 837 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
838 | in6_dev_put(idev); |
839 | ret = -1; | |
840 | goto out; | |
841 | } | |
842 | spin_lock_bh(&ifp->lock); | |
843 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
844 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
845 | spin_unlock_bh(&ifp->lock); | |
846 | write_unlock(&idev->lock); | |
f3213831 JP |
847 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
848 | __func__); | |
1da177e4 LT |
849 | in6_dev_put(idev); |
850 | ret = -1; | |
851 | goto out; | |
852 | } | |
853 | in6_ifa_hold(ifp); | |
854 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
855 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { | |
856 | spin_unlock_bh(&ifp->lock); | |
857 | write_unlock(&idev->lock); | |
f3213831 JP |
858 | pr_warn("%s: regeneration of randomized interface id failed\n", |
859 | __func__); | |
1da177e4 LT |
860 | in6_ifa_put(ifp); |
861 | in6_dev_put(idev); | |
862 | ret = -1; | |
863 | goto out; | |
864 | } | |
865 | memcpy(&addr.s6_addr[8], idev->rndid, 8); | |
76f793e3 | 866 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
867 | tmp_valid_lft = min_t(__u32, |
868 | ifp->valid_lft, | |
7a876b0e | 869 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
870 | tmp_prefered_lft = min_t(__u32, |
871 | ifp->prefered_lft, | |
7a876b0e | 872 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 873 | idev->cnf.max_desync_factor); |
1da177e4 LT |
874 | tmp_plen = ifp->prefix_len; |
875 | max_addresses = idev->cnf.max_addresses; | |
1da177e4 LT |
876 | tmp_tstamp = ifp->tstamp; |
877 | spin_unlock_bh(&ifp->lock); | |
878 | ||
eac55bf9 BB |
879 | regen_advance = idev->cnf.regen_max_retry * |
880 | idev->cnf.dad_transmits * | |
881 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 882 | write_unlock(&idev->lock); |
95c385b4 | 883 | |
eac55bf9 BB |
884 | /* A temporary address is created only if this calculated Preferred |
885 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
886 | * an implementation must not create a temporary address with a zero | |
887 | * Preferred Lifetime. | |
888 | */ | |
889 | if (tmp_prefered_lft <= regen_advance) { | |
890 | in6_ifa_put(ifp); | |
891 | in6_dev_put(idev); | |
892 | ret = -1; | |
893 | goto out; | |
894 | } | |
895 | ||
95c385b4 NH |
896 | addr_flags = IFA_F_TEMPORARY; |
897 | /* set in addrconf_prefix_rcv() */ | |
898 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
899 | addr_flags |= IFA_F_OPTIMISTIC; | |
900 | ||
1da177e4 | 901 | ift = !max_addresses || |
1ab1457c | 902 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 903 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
904 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
905 | addr_flags) : NULL; | |
1da177e4 LT |
906 | if (!ift || IS_ERR(ift)) { |
907 | in6_ifa_put(ifp); | |
908 | in6_dev_put(idev); | |
f3213831 | 909 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 LT |
910 | tmpaddr = &addr; |
911 | write_lock(&idev->lock); | |
912 | goto retry; | |
913 | } | |
914 | ||
915 | spin_lock_bh(&ift->lock); | |
916 | ift->ifpub = ifp; | |
917 | ift->valid_lft = tmp_valid_lft; | |
918 | ift->prefered_lft = tmp_prefered_lft; | |
76f793e3 | 919 | ift->cstamp = now; |
1da177e4 LT |
920 | ift->tstamp = tmp_tstamp; |
921 | spin_unlock_bh(&ift->lock); | |
922 | ||
cf22f9a2 | 923 | addrconf_dad_start(ift); |
1da177e4 LT |
924 | in6_ifa_put(ift); |
925 | in6_dev_put(idev); | |
926 | out: | |
927 | return ret; | |
928 | } | |
929 | #endif | |
930 | ||
931 | /* | |
072047e4 | 932 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 933 | */ |
a9b05723 YH |
934 | enum { |
935 | IPV6_SADDR_RULE_INIT = 0, | |
936 | IPV6_SADDR_RULE_LOCAL, | |
937 | IPV6_SADDR_RULE_SCOPE, | |
938 | IPV6_SADDR_RULE_PREFERRED, | |
939 | #ifdef CONFIG_IPV6_MIP6 | |
940 | IPV6_SADDR_RULE_HOA, | |
941 | #endif | |
942 | IPV6_SADDR_RULE_OIF, | |
943 | IPV6_SADDR_RULE_LABEL, | |
944 | #ifdef CONFIG_IPV6_PRIVACY | |
945 | IPV6_SADDR_RULE_PRIVACY, | |
946 | #endif | |
947 | IPV6_SADDR_RULE_ORCHID, | |
948 | IPV6_SADDR_RULE_PREFIX, | |
949 | IPV6_SADDR_RULE_MAX | |
950 | }; | |
951 | ||
072047e4 | 952 | struct ipv6_saddr_score { |
a9b05723 YH |
953 | int rule; |
954 | int addr_type; | |
955 | struct inet6_ifaddr *ifa; | |
956 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
957 | int scopedist; | |
958 | int matchlen; | |
072047e4 YH |
959 | }; |
960 | ||
a9b05723 | 961 | struct ipv6_saddr_dst { |
9acd9f3a | 962 | const struct in6_addr *addr; |
a9b05723 YH |
963 | int ifindex; |
964 | int scope; | |
965 | int label; | |
7cbca67c | 966 | unsigned int prefs; |
a9b05723 | 967 | }; |
072047e4 | 968 | |
b6f99a21 | 969 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 970 | { |
45bb0060 | 971 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
972 | return 1; |
973 | return 0; | |
1da177e4 LT |
974 | } |
975 | ||
3de23255 BT |
976 | static int ipv6_get_saddr_eval(struct net *net, |
977 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
978 | struct ipv6_saddr_dst *dst, |
979 | int i) | |
980 | { | |
981 | int ret; | |
982 | ||
983 | if (i <= score->rule) { | |
984 | switch (i) { | |
985 | case IPV6_SADDR_RULE_SCOPE: | |
986 | ret = score->scopedist; | |
987 | break; | |
988 | case IPV6_SADDR_RULE_PREFIX: | |
989 | ret = score->matchlen; | |
990 | break; | |
991 | default: | |
992 | ret = !!test_bit(i, score->scorebits); | |
993 | } | |
994 | goto out; | |
995 | } | |
996 | ||
997 | switch (i) { | |
998 | case IPV6_SADDR_RULE_INIT: | |
999 | /* Rule 0: remember if hiscore is not ready yet */ | |
1000 | ret = !!score->ifa; | |
1001 | break; | |
1002 | case IPV6_SADDR_RULE_LOCAL: | |
1003 | /* Rule 1: Prefer same address */ | |
1004 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1005 | break; | |
1006 | case IPV6_SADDR_RULE_SCOPE: | |
1007 | /* Rule 2: Prefer appropriate scope | |
1008 | * | |
1009 | * ret | |
1010 | * ^ | |
1011 | * -1 | d 15 | |
1012 | * ---+--+-+---> scope | |
1013 | * | | |
1014 | * | d is scope of the destination. | |
1015 | * B-d | \ | |
1016 | * | \ <- smaller scope is better if | |
1017 | * B-15 | \ if scope is enough for destinaion. | |
1018 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1019 | * d-C-1 | / | |
1020 | * |/ <- greater is better | |
1021 | * -C / if scope is not enough for destination. | |
1022 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1023 | * | |
1024 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1025 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1026 | * Assume B = 0 and we get C > 29. | |
1027 | */ | |
1028 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1029 | if (ret >= dst->scope) | |
1030 | ret = -ret; | |
1031 | else | |
1032 | ret -= 128; /* 30 is enough */ | |
1033 | score->scopedist = ret; | |
1034 | break; | |
1035 | case IPV6_SADDR_RULE_PREFERRED: | |
1036 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1037 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1038 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1039 | break; | |
1040 | #ifdef CONFIG_IPV6_MIP6 | |
1041 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1042 | { |
a9b05723 | 1043 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1044 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1045 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1046 | break; |
7cbca67c | 1047 | } |
a9b05723 YH |
1048 | #endif |
1049 | case IPV6_SADDR_RULE_OIF: | |
1050 | /* Rule 5: Prefer outgoing interface */ | |
1051 | ret = (!dst->ifindex || | |
1052 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1053 | break; | |
1054 | case IPV6_SADDR_RULE_LABEL: | |
1055 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1056 | ret = ipv6_addr_label(net, |
1057 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1058 | score->ifa->idev->dev->ifindex) == dst->label; |
1059 | break; | |
1060 | #ifdef CONFIG_IPV6_PRIVACY | |
1061 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1062 | { |
a9b05723 | 1063 | /* Rule 7: Prefer public address |
25985edc | 1064 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1065 | */ |
7cbca67c YH |
1066 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1067 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1068 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1069 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1070 | break; |
7cbca67c | 1071 | } |
a9b05723 YH |
1072 | #endif |
1073 | case IPV6_SADDR_RULE_ORCHID: | |
1074 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1075 | * non-ORCHID vs non-ORCHID | |
1076 | */ | |
1077 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1078 | ipv6_addr_orchid(dst->addr)); | |
1079 | break; | |
1080 | case IPV6_SADDR_RULE_PREFIX: | |
1081 | /* Rule 8: Use longest matching prefix */ | |
1082 | score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, | |
1083 | dst->addr); | |
1084 | break; | |
1085 | default: | |
1086 | ret = 0; | |
1087 | } | |
1088 | ||
1089 | if (ret) | |
1090 | __set_bit(i, score->scorebits); | |
1091 | score->rule = i; | |
1092 | out: | |
1093 | return ret; | |
1094 | } | |
1095 | ||
191cd582 | 1096 | int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3a | 1097 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1098 | struct in6_addr *saddr) |
1da177e4 | 1099 | { |
a9b05723 YH |
1100 | struct ipv6_saddr_score scores[2], |
1101 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1102 | struct ipv6_saddr_dst dst; |
072047e4 | 1103 | struct net_device *dev; |
a9b05723 | 1104 | int dst_type; |
1da177e4 | 1105 | |
a9b05723 YH |
1106 | dst_type = __ipv6_addr_type(daddr); |
1107 | dst.addr = daddr; | |
1108 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1109 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1110 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1111 | dst.prefs = prefs; |
a9b05723 YH |
1112 | |
1113 | hiscore->rule = -1; | |
1114 | hiscore->ifa = NULL; | |
1da177e4 | 1115 | |
8814c4b5 | 1116 | rcu_read_lock(); |
1da177e4 | 1117 | |
c6d14c84 | 1118 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1119 | struct inet6_dev *idev; |
072047e4 | 1120 | |
a9b05723 | 1121 | /* Candidate Source Address (section 4) |
072047e4 YH |
1122 | * - multicast and link-local destination address, |
1123 | * the set of candidate source address MUST only | |
1124 | * include addresses assigned to interfaces | |
1125 | * belonging to the same link as the outgoing | |
1126 | * interface. | |
1127 | * (- For site-local destination addresses, the | |
1128 | * set of candidate source addresses MUST only | |
1129 | * include addresses assigned to interfaces | |
1130 | * belonging to the same site as the outgoing | |
1131 | * interface.) | |
1132 | */ | |
a9b05723 YH |
1133 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1134 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1135 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1136 | continue; |
1da177e4 | 1137 | |
1da177e4 | 1138 | idev = __in6_dev_get(dev); |
072047e4 YH |
1139 | if (!idev) |
1140 | continue; | |
1141 | ||
1142 | read_lock_bh(&idev->lock); | |
502a2ffd | 1143 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1144 | int i; |
072047e4 | 1145 | |
a9b05723 | 1146 | /* |
6b3ae80a YH |
1147 | * - Tentative Address (RFC2462 section 5.4) |
1148 | * - A tentative address is not considered | |
1149 | * "assigned to an interface" in the traditional | |
95c385b4 | 1150 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1151 | * - Candidate Source Address (section 4) |
072047e4 YH |
1152 | * - In any case, anycast addresses, multicast |
1153 | * addresses, and the unspecified address MUST | |
1154 | * NOT be included in a candidate set. | |
1155 | */ | |
a9b05723 YH |
1156 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1157 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1158 | continue; |
a9b05723 YH |
1159 | |
1160 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1161 | ||
1162 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1163 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1164 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1165 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1166 | "assigned as unicast address on %s", |
1167 | dev->name); | |
1168 | continue; | |
1169 | } | |
1170 | ||
a9b05723 YH |
1171 | score->rule = -1; |
1172 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1173 | ||
1174 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1175 | int minihiscore, miniscore; | |
1176 | ||
3de23255 BT |
1177 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1178 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1179 | |
1180 | if (minihiscore > miniscore) { | |
1181 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1182 | score->scopedist > 0) { | |
1183 | /* | |
1184 | * special case: | |
1185 | * each remaining entry | |
1186 | * has too small (not enough) | |
1187 | * scope, because ifa entries | |
1188 | * are sorted by their scope | |
1189 | * values. | |
1190 | */ | |
1191 | goto try_nextdev; | |
1192 | } | |
1193 | break; | |
1194 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1195 | if (hiscore->ifa) |
1196 | in6_ifa_put(hiscore->ifa); | |
1197 | ||
1198 | in6_ifa_hold(score->ifa); | |
1199 | ||
a0bffffc | 1200 | swap(hiscore, score); |
a9b05723 YH |
1201 | |
1202 | /* restore our iterator */ | |
1203 | score->ifa = hiscore->ifa; | |
1204 | ||
1205 | break; | |
1da177e4 | 1206 | } |
072047e4 | 1207 | } |
1da177e4 | 1208 | } |
a9b05723 | 1209 | try_nextdev: |
072047e4 | 1210 | read_unlock_bh(&idev->lock); |
1da177e4 | 1211 | } |
8814c4b5 | 1212 | rcu_read_unlock(); |
1da177e4 | 1213 | |
a9b05723 | 1214 | if (!hiscore->ifa) |
072047e4 | 1215 | return -EADDRNOTAVAIL; |
1ab1457c | 1216 | |
4e3fd7a0 | 1217 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1218 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1219 | return 0; |
1da177e4 | 1220 | } |
5e5f3f0f | 1221 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1222 | |
95c385b4 NH |
1223 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1224 | unsigned char banned_flags) | |
1da177e4 LT |
1225 | { |
1226 | struct inet6_dev *idev; | |
1227 | int err = -EADDRNOTAVAIL; | |
1228 | ||
8814c4b5 | 1229 | rcu_read_lock(); |
e21e8467 SH |
1230 | idev = __in6_dev_get(dev); |
1231 | if (idev) { | |
1da177e4 LT |
1232 | struct inet6_ifaddr *ifp; |
1233 | ||
1234 | read_lock_bh(&idev->lock); | |
502a2ffd | 1235 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1236 | if (ifp->scope == IFA_LINK && | |
1237 | !(ifp->flags & banned_flags)) { | |
4e3fd7a0 | 1238 | *addr = ifp->addr; |
1da177e4 LT |
1239 | err = 0; |
1240 | break; | |
1241 | } | |
1242 | } | |
1243 | read_unlock_bh(&idev->lock); | |
1244 | } | |
8814c4b5 | 1245 | rcu_read_unlock(); |
1da177e4 LT |
1246 | return err; |
1247 | } | |
1248 | ||
1249 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1250 | { | |
1251 | int cnt = 0; | |
1252 | struct inet6_ifaddr *ifp; | |
1253 | ||
1254 | read_lock_bh(&idev->lock); | |
502a2ffd | 1255 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1256 | cnt++; |
1257 | read_unlock_bh(&idev->lock); | |
1258 | return cnt; | |
1259 | } | |
1260 | ||
b71d1d42 | 1261 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
bfeade08 | 1262 | struct net_device *dev, int strict) |
1da177e4 | 1263 | { |
eedf042a | 1264 | struct inet6_ifaddr *ifp; |
c2e21293 | 1265 | struct hlist_node *node; |
ddbe5032 | 1266 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1267 | |
5c578aed | 1268 | rcu_read_lock_bh(); |
1269 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1270 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1271 | continue; |
1da177e4 | 1272 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1273 | !(ifp->flags&IFA_F_TENTATIVE) && |
1274 | (dev == NULL || ifp->idev->dev == dev || | |
1275 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1276 | rcu_read_unlock_bh(); | |
1277 | return 1; | |
1da177e4 LT |
1278 | } |
1279 | } | |
5c578aed | 1280 | |
eedf042a SH |
1281 | rcu_read_unlock_bh(); |
1282 | return 0; | |
1da177e4 | 1283 | } |
7159039a YH |
1284 | EXPORT_SYMBOL(ipv6_chk_addr); |
1285 | ||
3e81c6da DM |
1286 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1287 | struct net_device *dev) | |
1da177e4 | 1288 | { |
ddbe5032 | 1289 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1290 | struct inet6_ifaddr *ifp; |
1291 | struct hlist_node *node; | |
1da177e4 | 1292 | |
c2e21293 | 1293 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1294 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1295 | continue; |
1da177e4 LT |
1296 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1297 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1298 | return true; |
1da177e4 LT |
1299 | } |
1300 | } | |
3e81c6da | 1301 | return false; |
1da177e4 LT |
1302 | } |
1303 | ||
b71d1d42 | 1304 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1305 | { |
1306 | struct inet6_dev *idev; | |
1307 | struct inet6_ifaddr *ifa; | |
1308 | int onlink; | |
1309 | ||
1310 | onlink = 0; | |
1311 | rcu_read_lock(); | |
1312 | idev = __in6_dev_get(dev); | |
1313 | if (idev) { | |
1314 | read_lock_bh(&idev->lock); | |
502a2ffd | 1315 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1316 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1317 | ifa->prefix_len); | |
1318 | if (onlink) | |
1319 | break; | |
1320 | } | |
1321 | read_unlock_bh(&idev->lock); | |
1322 | } | |
1323 | rcu_read_unlock(); | |
1324 | return onlink; | |
1325 | } | |
52eeeb84 YH |
1326 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1327 | ||
9acd9f3a | 1328 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1329 | struct net_device *dev, int strict) |
1da177e4 | 1330 | { |
b79d1d54 | 1331 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1332 | unsigned int hash = inet6_addr_hash(addr); |
b79d1d54 | 1333 | struct hlist_node *node; |
1da177e4 | 1334 | |
5c578aed | 1335 | rcu_read_lock_bh(); |
4f70ecca | 1336 | hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1337 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1338 | continue; |
1da177e4 LT |
1339 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1340 | if (dev == NULL || ifp->idev->dev == dev || | |
1341 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1342 | result = ifp; |
1da177e4 LT |
1343 | in6_ifa_hold(ifp); |
1344 | break; | |
1345 | } | |
1346 | } | |
1347 | } | |
5c578aed | 1348 | rcu_read_unlock_bh(); |
1da177e4 | 1349 | |
b79d1d54 | 1350 | return result; |
1da177e4 LT |
1351 | } |
1352 | ||
1da177e4 LT |
1353 | /* Gets referenced address, destroys ifaddr */ |
1354 | ||
cc411d0b | 1355 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1356 | { |
1da177e4 LT |
1357 | if (ifp->flags&IFA_F_PERMANENT) { |
1358 | spin_lock_bh(&ifp->lock); | |
1359 | addrconf_del_timer(ifp); | |
1360 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1361 | if (dad_failed) |
1362 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1363 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1364 | if (dad_failed) |
1365 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1366 | in6_ifa_put(ifp); |
1367 | #ifdef CONFIG_IPV6_PRIVACY | |
1368 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1369 | struct inet6_ifaddr *ifpub; | |
1370 | spin_lock_bh(&ifp->lock); | |
1371 | ifpub = ifp->ifpub; | |
1372 | if (ifpub) { | |
1373 | in6_ifa_hold(ifpub); | |
1374 | spin_unlock_bh(&ifp->lock); | |
1375 | ipv6_create_tempaddr(ifpub, ifp); | |
1376 | in6_ifa_put(ifpub); | |
1377 | } else { | |
1378 | spin_unlock_bh(&ifp->lock); | |
1379 | } | |
1380 | ipv6_del_addr(ifp); | |
1381 | #endif | |
1382 | } else | |
1383 | ipv6_del_addr(ifp); | |
1384 | } | |
1385 | ||
f2344a13 HX |
1386 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1387 | { | |
1388 | int err = -ENOENT; | |
1389 | ||
1390 | spin_lock(&ifp->state_lock); | |
1391 | if (ifp->state == INET6_IFADDR_STATE_DAD) { | |
1392 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1393 | err = 0; | |
1394 | } | |
1395 | spin_unlock(&ifp->state_lock); | |
1396 | ||
1397 | return err; | |
1398 | } | |
1399 | ||
3c21edbd YH |
1400 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1401 | { | |
1b34be74 | 1402 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1403 | |
853dc2e0 UB |
1404 | if (addrconf_dad_end(ifp)) { |
1405 | in6_ifa_put(ifp); | |
f2344a13 | 1406 | return; |
853dc2e0 | 1407 | } |
f2344a13 | 1408 | |
e87cc472 JP |
1409 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1410 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1411 | |
1b34be74 YH |
1412 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1413 | struct in6_addr addr; | |
1414 | ||
1415 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1416 | addr.s6_addr32[1] = 0; | |
1417 | ||
1418 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1419 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1420 | /* DAD failed for link-local based on MAC address */ | |
1421 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1422 | |
f3213831 | 1423 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1424 | ifp->idev->dev->name); |
1b34be74 YH |
1425 | } |
1426 | } | |
1427 | ||
cc411d0b | 1428 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1429 | } |
1da177e4 LT |
1430 | |
1431 | /* Join to solicited addr multicast group. */ | |
1432 | ||
b71d1d42 | 1433 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1434 | { |
1435 | struct in6_addr maddr; | |
1436 | ||
1437 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1438 | return; | |
1439 | ||
1440 | addrconf_addr_solict_mult(addr, &maddr); | |
1441 | ipv6_dev_mc_inc(dev, &maddr); | |
1442 | } | |
1443 | ||
b71d1d42 | 1444 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1445 | { |
1446 | struct in6_addr maddr; | |
1447 | ||
1448 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1449 | return; | |
1450 | ||
1451 | addrconf_addr_solict_mult(addr, &maddr); | |
1452 | __ipv6_dev_mc_dec(idev, &maddr); | |
1453 | } | |
1454 | ||
20380731 | 1455 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1456 | { |
1457 | struct in6_addr addr; | |
2bda8a0c BM |
1458 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1459 | return; | |
1da177e4 LT |
1460 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1461 | if (ipv6_addr_any(&addr)) | |
1462 | return; | |
1463 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1464 | } | |
1465 | ||
20380731 | 1466 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1467 | { |
1468 | struct in6_addr addr; | |
32019e65 YH |
1469 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1470 | return; | |
1da177e4 LT |
1471 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1472 | if (ipv6_addr_any(&addr)) | |
1473 | return; | |
1474 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1475 | } | |
1476 | ||
073a8e0e YH |
1477 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1478 | { | |
1479 | if (dev->addr_len != ETH_ALEN) | |
1480 | return -1; | |
1481 | memcpy(eui, dev->dev_addr, 3); | |
1482 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1483 | ||
1484 | /* | |
1485 | * The zSeries OSA network cards can be shared among various | |
1486 | * OS instances, but the OSA cards have only one MAC address. | |
1487 | * This leads to duplicate address conflicts in conjunction | |
1488 | * with IPv6 if more than one instance uses the same card. | |
1489 | * | |
1490 | * The driver for these cards can deliver a unique 16-bit | |
1491 | * identifier for each instance sharing the same card. It is | |
1492 | * placed instead of 0xFFFE in the interface identifier. The | |
1493 | * "u" bit of the interface identifier is not inverted in this | |
1494 | * case. Hence the resulting interface identifier has local | |
1495 | * scope according to RFC2373. | |
1496 | */ | |
1497 | if (dev->dev_id) { | |
1498 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1499 | eui[4] = dev->dev_id & 0xFF; | |
1500 | } else { | |
1501 | eui[3] = 0xFF; | |
1502 | eui[4] = 0xFE; | |
1503 | eui[0] ^= 2; | |
1504 | } | |
1505 | return 0; | |
1506 | } | |
1507 | ||
06a4c1c5 | 1508 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1509 | { | |
1510 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1511 | return -1; | |
1512 | memcpy(eui, dev->dev_addr, 8); | |
1513 | return 0; | |
1514 | } | |
1515 | ||
073a8e0e YH |
1516 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1517 | { | |
1518 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1519 | if (dev->addr_len != ARCNET_ALEN) | |
1520 | return -1; | |
1521 | memset(eui, 0, 7); | |
8e5e8f30 | 1522 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1523 | return 0; |
1524 | } | |
1525 | ||
1526 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1527 | { | |
1528 | if (dev->addr_len != INFINIBAND_ALEN) | |
1529 | return -1; | |
1530 | memcpy(eui, dev->dev_addr + 12, 8); | |
1531 | eui[0] |= 2; | |
1532 | return 0; | |
1533 | } | |
1534 | ||
c61393ea | 1535 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1536 | { |
9af28511 SH |
1537 | if (addr == 0) |
1538 | return -1; | |
dfd982ba YH |
1539 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1540 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1541 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1542 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1543 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1544 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1545 | eui[1] = 0; | |
1546 | eui[2] = 0x5E; | |
1547 | eui[3] = 0xFE; | |
1548 | memcpy(eui + 4, &addr, 4); | |
1549 | return 0; | |
1550 | } | |
dfd982ba YH |
1551 | |
1552 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1553 | { | |
1554 | if (dev->priv_flags & IFF_ISATAP) | |
1555 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1556 | return -1; | |
1557 | } | |
1558 | ||
aee80b54 | 1559 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1560 | { | |
1561 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1562 | } | |
1563 | ||
1da177e4 LT |
1564 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1565 | { | |
1566 | switch (dev->type) { | |
1567 | case ARPHRD_ETHER: | |
1568 | case ARPHRD_FDDI: | |
073a8e0e | 1569 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1570 | case ARPHRD_ARCNET: |
073a8e0e | 1571 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1572 | case ARPHRD_INFINIBAND: |
073a8e0e | 1573 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1574 | case ARPHRD_SIT: |
dfd982ba | 1575 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1576 | case ARPHRD_IPGRE: |
1577 | return addrconf_ifid_gre(eui, dev); | |
06a4c1c5 | 1578 | case ARPHRD_IEEE802154: |
1579 | return addrconf_ifid_eui64(eui, dev); | |
1da177e4 LT |
1580 | } |
1581 | return -1; | |
1582 | } | |
1583 | ||
1584 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1585 | { | |
1586 | int err = -1; | |
1587 | struct inet6_ifaddr *ifp; | |
1588 | ||
1589 | read_lock_bh(&idev->lock); | |
502a2ffd | 1590 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1591 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1592 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1593 | err = 0; | |
1594 | break; | |
1595 | } | |
1596 | } | |
1597 | read_unlock_bh(&idev->lock); | |
1598 | return err; | |
1599 | } | |
1600 | ||
1601 | #ifdef CONFIG_IPV6_PRIVACY | |
1602 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
1603 | static int __ipv6_regen_rndid(struct inet6_dev *idev) | |
1604 | { | |
1da177e4 | 1605 | regen: |
955189ef | 1606 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1607 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1608 | |
1609 | /* | |
1610 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1611 | * check if generated address is not inappropriate | |
1612 | * | |
1613 | * - Reserved subnet anycast (RFC 2526) | |
1614 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1615 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1616 | * 00-00-5E-FE-xx-xx-xx-xx |
1617 | * - value 0 | |
1618 | * - XXX: already assigned to an address on the device | |
1619 | */ | |
1ab1457c | 1620 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1621 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1622 | (idev->rndid[7]&0x80)) | |
1623 | goto regen; | |
1624 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1625 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1626 | goto regen; | |
1627 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1628 | goto regen; | |
1629 | } | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
1634 | static void ipv6_regen_rndid(unsigned long data) | |
1635 | { | |
1636 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1637 | unsigned long expires; | |
1638 | ||
8814c4b5 | 1639 | rcu_read_lock_bh(); |
1da177e4 LT |
1640 | write_lock_bh(&idev->lock); |
1641 | ||
1642 | if (idev->dead) | |
1643 | goto out; | |
1644 | ||
1645 | if (__ipv6_regen_rndid(idev) < 0) | |
1646 | goto out; | |
1ab1457c | 1647 | |
1da177e4 | 1648 | expires = jiffies + |
1ab1457c | 1649 | idev->cnf.temp_prefered_lft * HZ - |
784e2710 BH |
1650 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
1651 | idev->cnf.max_desync_factor * HZ; | |
1da177e4 | 1652 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1653 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1654 | __func__, idev->dev->name); | |
1da177e4 LT |
1655 | goto out; |
1656 | } | |
1657 | ||
1658 | if (!mod_timer(&idev->regen_timer, expires)) | |
1659 | in6_dev_hold(idev); | |
1660 | ||
1661 | out: | |
1662 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1663 | rcu_read_unlock_bh(); |
1da177e4 LT |
1664 | in6_dev_put(idev); |
1665 | } | |
1666 | ||
8e5e8f30 EZ |
1667 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
1668 | { | |
1da177e4 LT |
1669 | int ret = 0; |
1670 | ||
1671 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) | |
1672 | ret = __ipv6_regen_rndid(idev); | |
1673 | return ret; | |
1674 | } | |
1675 | #endif | |
1676 | ||
1677 | /* | |
1678 | * Add prefix route. | |
1679 | */ | |
1680 | ||
1681 | static void | |
1682 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1683 | unsigned long expires, u32 flags) |
1da177e4 | 1684 | { |
86872cb5 TG |
1685 | struct fib6_config cfg = { |
1686 | .fc_table = RT6_TABLE_PREFIX, | |
1687 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1688 | .fc_ifindex = dev->ifindex, | |
1689 | .fc_expires = expires, | |
1690 | .fc_dst_len = plen, | |
1691 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1692 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1693 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1694 | }; |
1da177e4 | 1695 | |
4e3fd7a0 | 1696 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1697 | |
1698 | /* Prevent useless cloning on PtP SIT. | |
1699 | This thing is done here expecting that the whole | |
1700 | class of non-broadcast devices need not cloning. | |
1701 | */ | |
0be669bb | 1702 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb5 TG |
1703 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1704 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1705 | #endif |
1da177e4 | 1706 | |
86872cb5 | 1707 | ip6_route_add(&cfg); |
1da177e4 LT |
1708 | } |
1709 | ||
14ef37b6 AH |
1710 | |
1711 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
1712 | int plen, | |
1713 | const struct net_device *dev, | |
1714 | u32 flags, u32 noflags) | |
1715 | { | |
1716 | struct fib6_node *fn; | |
1717 | struct rt6_info *rt = NULL; | |
1718 | struct fib6_table *table; | |
1719 | ||
1720 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
1721 | if (table == NULL) | |
1722 | return NULL; | |
1723 | ||
1724 | write_lock_bh(&table->tb6_lock); | |
1725 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); | |
1726 | if (!fn) | |
1727 | goto out; | |
1728 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 1729 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
1730 | continue; |
1731 | if ((rt->rt6i_flags & flags) != flags) | |
1732 | continue; | |
1733 | if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0)) | |
1734 | continue; | |
1735 | dst_hold(&rt->dst); | |
1736 | break; | |
1737 | } | |
1738 | out: | |
1739 | write_unlock_bh(&table->tb6_lock); | |
1740 | return rt; | |
1741 | } | |
1742 | ||
1743 | ||
1da177e4 LT |
1744 | /* Create "default" multicast route to the interface */ |
1745 | ||
1746 | static void addrconf_add_mroute(struct net_device *dev) | |
1747 | { | |
86872cb5 TG |
1748 | struct fib6_config cfg = { |
1749 | .fc_table = RT6_TABLE_LOCAL, | |
1750 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1751 | .fc_ifindex = dev->ifindex, | |
1752 | .fc_dst_len = 8, | |
1753 | .fc_flags = RTF_UP, | |
c346dca1 | 1754 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1755 | }; |
1756 | ||
1757 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1758 | ||
1759 | ip6_route_add(&cfg); | |
1da177e4 LT |
1760 | } |
1761 | ||
0be669bb | 1762 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
1763 | static void sit_route_add(struct net_device *dev) |
1764 | { | |
86872cb5 TG |
1765 | struct fib6_config cfg = { |
1766 | .fc_table = RT6_TABLE_MAIN, | |
1767 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1768 | .fc_ifindex = dev->ifindex, | |
1769 | .fc_dst_len = 96, | |
1770 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1771 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1772 | }; |
1da177e4 LT |
1773 | |
1774 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1775 | ip6_route_add(&cfg); |
1da177e4 | 1776 | } |
0be669bb | 1777 | #endif |
1da177e4 LT |
1778 | |
1779 | static void addrconf_add_lroute(struct net_device *dev) | |
1780 | { | |
1781 | struct in6_addr addr; | |
1782 | ||
1783 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
1784 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
1785 | } | |
1786 | ||
1787 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) | |
1788 | { | |
1789 | struct inet6_dev *idev; | |
1790 | ||
1791 | ASSERT_RTNL(); | |
1792 | ||
e21e8467 SH |
1793 | idev = ipv6_find_idev(dev); |
1794 | if (!idev) | |
64e724f6 BH |
1795 | return ERR_PTR(-ENOBUFS); |
1796 | ||
1797 | if (idev->cnf.disable_ipv6) | |
1798 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
1799 | |
1800 | /* Add default multicast route */ | |
4af04aba LW |
1801 | if (!(dev->flags & IFF_LOOPBACK)) |
1802 | addrconf_add_mroute(dev); | |
1da177e4 LT |
1803 | |
1804 | /* Add link local route */ | |
1805 | addrconf_add_lroute(dev); | |
1806 | return idev; | |
1807 | } | |
1808 | ||
e6bff995 | 1809 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
1810 | { |
1811 | struct prefix_info *pinfo; | |
1812 | __u32 valid_lft; | |
1813 | __u32 prefered_lft; | |
1814 | int addr_type; | |
1da177e4 | 1815 | struct inet6_dev *in6_dev; |
56d417b1 | 1816 | struct net *net = dev_net(dev); |
1da177e4 LT |
1817 | |
1818 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1819 | |
1da177e4 LT |
1820 | if (len < sizeof(struct prefix_info)) { |
1821 | ADBG(("addrconf: prefix option too short\n")); | |
1822 | return; | |
1823 | } | |
1ab1457c | 1824 | |
1da177e4 LT |
1825 | /* |
1826 | * Validation checks ([ADDRCONF], page 19) | |
1827 | */ | |
1828 | ||
1829 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1830 | ||
1831 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1832 | return; | |
1833 | ||
1834 | valid_lft = ntohl(pinfo->valid); | |
1835 | prefered_lft = ntohl(pinfo->prefered); | |
1836 | ||
1837 | if (prefered_lft > valid_lft) { | |
e87cc472 | 1838 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
1839 | return; |
1840 | } | |
1841 | ||
1842 | in6_dev = in6_dev_get(dev); | |
1843 | ||
1844 | if (in6_dev == NULL) { | |
e87cc472 JP |
1845 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
1846 | dev->name); | |
1da177e4 LT |
1847 | return; |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * Two things going on here: | |
1852 | * 1) Add routes for on-link prefixes | |
1853 | * 2) Configure prefixes with the auto flag set | |
1854 | */ | |
1855 | ||
4bed72e4 YH |
1856 | if (pinfo->onlink) { |
1857 | struct rt6_info *rt; | |
1858 | unsigned long rt_expires; | |
1859 | ||
6f704992 YH |
1860 | /* Avoid arithmetic overflow. Really, we could |
1861 | * save rt_expires in seconds, likely valid_lft, | |
1862 | * but it would require division in fib gc, that it | |
1863 | * not good. | |
1864 | */ | |
4bed72e4 YH |
1865 | if (HZ > USER_HZ) |
1866 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
1867 | else | |
1868 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 1869 | |
4bed72e4 YH |
1870 | if (addrconf_finite_timeout(rt_expires)) |
1871 | rt_expires *= HZ; | |
1da177e4 | 1872 | |
14ef37b6 AH |
1873 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
1874 | pinfo->prefix_len, | |
1875 | dev, | |
1876 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
1877 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 1878 | |
14ef37b6 | 1879 | if (rt) { |
6f704992 YH |
1880 | /* Autoconf prefix route */ |
1881 | if (valid_lft == 0) { | |
1882 | ip6_del_rt(rt); | |
1883 | rt = NULL; | |
4bed72e4 | 1884 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 1885 | /* not infinity */ |
1716a961 | 1886 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 1887 | } else { |
1716a961 | 1888 | rt6_clean_expires(rt); |
1da177e4 LT |
1889 | } |
1890 | } else if (valid_lft) { | |
6f704992 | 1891 | clock_t expires = 0; |
4bed72e4 YH |
1892 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
1893 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
1894 | /* not infinity */ |
1895 | flags |= RTF_EXPIRES; | |
1896 | expires = jiffies_to_clock_t(rt_expires); | |
1897 | } | |
1da177e4 | 1898 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 1899 | dev, expires, flags); |
1da177e4 LT |
1900 | } |
1901 | if (rt) | |
d8d1f30b | 1902 | dst_release(&rt->dst); |
1da177e4 LT |
1903 | } |
1904 | ||
1905 | /* Try to figure out our local address for this prefix */ | |
1906 | ||
1907 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 1908 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
1909 | struct in6_addr addr; |
1910 | int create = 0, update_lft = 0; | |
1911 | ||
1912 | if (pinfo->prefix_len == 64) { | |
1913 | memcpy(&addr, &pinfo->prefix, 8); | |
1914 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
1915 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1916 | in6_dev_put(in6_dev); | |
1917 | return; | |
1918 | } | |
1919 | goto ok; | |
1920 | } | |
e87cc472 JP |
1921 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
1922 | pinfo->prefix_len); | |
1da177e4 LT |
1923 | in6_dev_put(in6_dev); |
1924 | return; | |
1925 | ||
1926 | ok: | |
1927 | ||
53b7997f | 1928 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
1929 | |
1930 | if (ifp == NULL && valid_lft) { | |
1931 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
1932 | u32 addr_flags = 0; |
1933 | ||
1934 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1935 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 1936 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
1937 | addr_flags = IFA_F_OPTIMISTIC; |
1938 | #endif | |
1da177e4 LT |
1939 | |
1940 | /* Do not allow to create too much of autoconfigured | |
1941 | * addresses; this would be too easy way to crash kernel. | |
1942 | */ | |
1943 | if (!max_addresses || | |
1944 | ipv6_count_addresses(in6_dev) < max_addresses) | |
1945 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
1946 | addr_type&IPV6_ADDR_SCOPE_MASK, |
1947 | addr_flags); | |
1da177e4 LT |
1948 | |
1949 | if (!ifp || IS_ERR(ifp)) { | |
1950 | in6_dev_put(in6_dev); | |
1951 | return; | |
1952 | } | |
1953 | ||
1954 | update_lft = create = 1; | |
1955 | ifp->cstamp = jiffies; | |
cf22f9a2 | 1956 | addrconf_dad_start(ifp); |
1da177e4 LT |
1957 | } |
1958 | ||
1959 | if (ifp) { | |
1960 | int flags; | |
1961 | unsigned long now; | |
1962 | #ifdef CONFIG_IPV6_PRIVACY | |
1963 | struct inet6_ifaddr *ift; | |
1964 | #endif | |
1965 | u32 stored_lft; | |
1966 | ||
1967 | /* update lifetime (RFC2462 5.5.3 e) */ | |
1968 | spin_lock(&ifp->lock); | |
1969 | now = jiffies; | |
1970 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
1971 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
1972 | else | |
1973 | stored_lft = 0; | |
1974 | if (!update_lft && stored_lft) { | |
1975 | if (valid_lft > MIN_VALID_LIFETIME || | |
1976 | valid_lft > stored_lft) | |
1977 | update_lft = 1; | |
1978 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
1979 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
1980 | /* |
1981 | * RFC 4862 Section 5.5.3e: | |
1982 | * "Note that the preferred lifetime of | |
1983 | * the corresponding address is always | |
1984 | * reset to the Preferred Lifetime in | |
1985 | * the received Prefix Information | |
1986 | * option, regardless of whether the | |
1987 | * valid lifetime is also reset or | |
1988 | * ignored." | |
1989 | * | |
1990 | * So if the preferred lifetime in | |
1991 | * this advertisement is different | |
1992 | * than what we have stored, but the | |
1993 | * valid lifetime is invalid, just | |
1994 | * reset prefered_lft. | |
1995 | * | |
1996 | * We must set the valid lifetime | |
1997 | * to the stored lifetime since we'll | |
1998 | * be updating the timestamp below, | |
1999 | * else we'll set it back to the | |
25985edc | 2000 | * minimum. |
a1ed0526 BH |
2001 | */ |
2002 | if (prefered_lft != ifp->prefered_lft) { | |
2003 | valid_lft = stored_lft; | |
2004 | update_lft = 1; | |
2005 | } | |
1da177e4 LT |
2006 | } else { |
2007 | valid_lft = MIN_VALID_LIFETIME; | |
2008 | if (valid_lft < prefered_lft) | |
2009 | prefered_lft = valid_lft; | |
2010 | update_lft = 1; | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | if (update_lft) { | |
2015 | ifp->valid_lft = valid_lft; | |
2016 | ifp->prefered_lft = prefered_lft; | |
2017 | ifp->tstamp = now; | |
2018 | flags = ifp->flags; | |
2019 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2020 | spin_unlock(&ifp->lock); | |
2021 | ||
2022 | if (!(flags&IFA_F_TENTATIVE)) | |
2023 | ipv6_ifa_notify(0, ifp); | |
2024 | } else | |
2025 | spin_unlock(&ifp->lock); | |
2026 | ||
2027 | #ifdef CONFIG_IPV6_PRIVACY | |
2028 | read_lock_bh(&in6_dev->lock); | |
2029 | /* update all temporary addresses in the list */ | |
76f793e3 LC |
2030 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
2031 | tmp_list) { | |
2032 | int age, max_valid, max_prefered; | |
2033 | ||
c6fbfac2 BB |
2034 | if (ifp != ift->ifpub) |
2035 | continue; | |
2036 | ||
76f793e3 LC |
2037 | /* |
2038 | * RFC 4941 section 3.3: | |
2039 | * If a received option will extend the lifetime | |
2040 | * of a public address, the lifetimes of | |
2041 | * temporary addresses should be extended, | |
2042 | * subject to the overall constraint that no | |
2043 | * temporary addresses should ever remain | |
2044 | * "valid" or "preferred" for a time longer than | |
2045 | * (TEMP_VALID_LIFETIME) or | |
2046 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), | |
2047 | * respectively. | |
2048 | */ | |
2049 | age = (now - ift->cstamp) / HZ; | |
2050 | max_valid = in6_dev->cnf.temp_valid_lft - age; | |
2051 | if (max_valid < 0) | |
2052 | max_valid = 0; | |
2053 | ||
2054 | max_prefered = in6_dev->cnf.temp_prefered_lft - | |
2055 | in6_dev->cnf.max_desync_factor - | |
2056 | age; | |
2057 | if (max_prefered < 0) | |
2058 | max_prefered = 0; | |
2059 | ||
2060 | if (valid_lft > max_valid) | |
2061 | valid_lft = max_valid; | |
2062 | ||
2063 | if (prefered_lft > max_prefered) | |
2064 | prefered_lft = max_prefered; | |
2065 | ||
1da177e4 LT |
2066 | spin_lock(&ift->lock); |
2067 | flags = ift->flags; | |
76f793e3 LC |
2068 | ift->valid_lft = valid_lft; |
2069 | ift->prefered_lft = prefered_lft; | |
2070 | ift->tstamp = now; | |
2071 | if (prefered_lft > 0) | |
2072 | ift->flags &= ~IFA_F_DEPRECATED; | |
2073 | ||
1da177e4 LT |
2074 | spin_unlock(&ift->lock); |
2075 | if (!(flags&IFA_F_TENTATIVE)) | |
2076 | ipv6_ifa_notify(0, ift); | |
2077 | } | |
2078 | ||
aed65501 | 2079 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4 | 2080 | /* |
76f793e3 LC |
2081 | * When a new public address is created as |
2082 | * described in [ADDRCONF], also create a new | |
2083 | * temporary address. Also create a temporary | |
2084 | * address if it's enabled but no temporary | |
2085 | * address currently exists. | |
1da177e4 | 2086 | */ |
1ab1457c | 2087 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2088 | ipv6_create_tempaddr(ifp, NULL); |
2089 | } else { | |
2090 | read_unlock_bh(&in6_dev->lock); | |
2091 | } | |
2092 | #endif | |
2093 | in6_ifa_put(ifp); | |
2094 | addrconf_verify(0); | |
2095 | } | |
2096 | } | |
2097 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2098 | in6_dev_put(in6_dev); | |
2099 | } | |
2100 | ||
2101 | /* | |
2102 | * Set destination address. | |
2103 | * Special case for SIT interfaces where we create a new "virtual" | |
2104 | * device. | |
2105 | */ | |
af284937 | 2106 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2107 | { |
2108 | struct in6_ifreq ireq; | |
2109 | struct net_device *dev; | |
2110 | int err = -EINVAL; | |
2111 | ||
2112 | rtnl_lock(); | |
2113 | ||
2114 | err = -EFAULT; | |
2115 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2116 | goto err_exit; | |
2117 | ||
af284937 | 2118 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2119 | |
2120 | err = -ENODEV; | |
2121 | if (dev == NULL) | |
2122 | goto err_exit; | |
2123 | ||
0be669bb | 2124 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 | 2125 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2126 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2127 | struct ifreq ifr; |
1da177e4 LT |
2128 | struct ip_tunnel_parm p; |
2129 | ||
2130 | err = -EADDRNOTAVAIL; | |
2131 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2132 | goto err_exit; | |
2133 | ||
2134 | memset(&p, 0, sizeof(p)); | |
2135 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2136 | p.iph.saddr = 0; | |
2137 | p.iph.version = 4; | |
2138 | p.iph.ihl = 5; | |
2139 | p.iph.protocol = IPPROTO_IPV6; | |
2140 | p.iph.ttl = 64; | |
d20b3109 | 2141 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2142 | |
5bc3eb7e SH |
2143 | if (ops->ndo_do_ioctl) { |
2144 | mm_segment_t oldfs = get_fs(); | |
2145 | ||
2146 | set_fs(KERNEL_DS); | |
2147 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2148 | set_fs(oldfs); | |
2149 | } else | |
2150 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2151 | |
2152 | if (err == 0) { | |
2153 | err = -ENOBUFS; | |
af284937 DL |
2154 | dev = __dev_get_by_name(net, p.name); |
2155 | if (!dev) | |
1da177e4 LT |
2156 | goto err_exit; |
2157 | err = dev_open(dev); | |
2158 | } | |
2159 | } | |
0be669bb | 2160 | #endif |
1da177e4 LT |
2161 | |
2162 | err_exit: | |
2163 | rtnl_unlock(); | |
2164 | return err; | |
2165 | } | |
2166 | ||
2167 | /* | |
2168 | * Manual configuration of address on an interface | |
2169 | */ | |
b71d1d42 | 2170 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2171 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2172 | __u32 valid_lft) |
1da177e4 LT |
2173 | { |
2174 | struct inet6_ifaddr *ifp; | |
2175 | struct inet6_dev *idev; | |
2176 | struct net_device *dev; | |
2177 | int scope; | |
6f704992 YH |
2178 | u32 flags; |
2179 | clock_t expires; | |
4bed72e4 | 2180 | unsigned long timeout; |
1da177e4 LT |
2181 | |
2182 | ASSERT_RTNL(); | |
1ab1457c | 2183 | |
24ef0da7 TG |
2184 | if (plen > 128) |
2185 | return -EINVAL; | |
2186 | ||
0778769d NT |
2187 | /* check the lifetime */ |
2188 | if (!valid_lft || prefered_lft > valid_lft) | |
2189 | return -EINVAL; | |
2190 | ||
af284937 DL |
2191 | dev = __dev_get_by_index(net, ifindex); |
2192 | if (!dev) | |
1da177e4 | 2193 | return -ENODEV; |
1ab1457c | 2194 | |
64e724f6 BH |
2195 | idev = addrconf_add_dev(dev); |
2196 | if (IS_ERR(idev)) | |
2197 | return PTR_ERR(idev); | |
1da177e4 LT |
2198 | |
2199 | scope = ipv6_addr_scope(pfx); | |
2200 | ||
4bed72e4 YH |
2201 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2202 | if (addrconf_finite_timeout(timeout)) { | |
2203 | expires = jiffies_to_clock_t(timeout * HZ); | |
2204 | valid_lft = timeout; | |
6f704992 | 2205 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2206 | } else { |
2207 | expires = 0; | |
2208 | flags = 0; | |
2209 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2210 | } |
0778769d | 2211 | |
4bed72e4 YH |
2212 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2213 | if (addrconf_finite_timeout(timeout)) { | |
2214 | if (timeout == 0) | |
2215 | ifa_flags |= IFA_F_DEPRECATED; | |
2216 | prefered_lft = timeout; | |
2217 | } | |
0778769d NT |
2218 | |
2219 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2220 | ||
1da177e4 | 2221 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2222 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2223 | ifp->valid_lft = valid_lft; |
2224 | ifp->prefered_lft = prefered_lft; | |
2225 | ifp->tstamp = jiffies; | |
06aebfb7 | 2226 | spin_unlock_bh(&ifp->lock); |
0778769d | 2227 | |
46d48046 | 2228 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2229 | expires, flags); |
95c385b4 NH |
2230 | /* |
2231 | * Note that section 3.1 of RFC 4429 indicates | |
2232 | * that the Optimistic flag should not be set for | |
2233 | * manually configured addresses | |
2234 | */ | |
cf22f9a2 | 2235 | addrconf_dad_start(ifp); |
1da177e4 | 2236 | in6_ifa_put(ifp); |
0778769d | 2237 | addrconf_verify(0); |
1da177e4 LT |
2238 | return 0; |
2239 | } | |
2240 | ||
2241 | return PTR_ERR(ifp); | |
2242 | } | |
2243 | ||
b71d1d42 | 2244 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2245 | unsigned int plen) |
1da177e4 LT |
2246 | { |
2247 | struct inet6_ifaddr *ifp; | |
2248 | struct inet6_dev *idev; | |
2249 | struct net_device *dev; | |
1ab1457c | 2250 | |
24ef0da7 TG |
2251 | if (plen > 128) |
2252 | return -EINVAL; | |
2253 | ||
af284937 DL |
2254 | dev = __dev_get_by_index(net, ifindex); |
2255 | if (!dev) | |
1da177e4 LT |
2256 | return -ENODEV; |
2257 | ||
2258 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2259 | return -ENXIO; | |
2260 | ||
2261 | read_lock_bh(&idev->lock); | |
502a2ffd | 2262 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2263 | if (ifp->prefix_len == plen && |
2264 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2265 | in6_ifa_hold(ifp); | |
2266 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2267 | |
1da177e4 LT |
2268 | ipv6_del_addr(ifp); |
2269 | ||
2270 | /* If the last address is deleted administratively, | |
2271 | disable IPv6 on this interface. | |
2272 | */ | |
502a2ffd | 2273 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2274 | addrconf_ifdown(idev->dev, 1); |
2275 | return 0; | |
2276 | } | |
2277 | } | |
2278 | read_unlock_bh(&idev->lock); | |
2279 | return -EADDRNOTAVAIL; | |
2280 | } | |
2281 | ||
2282 | ||
af284937 | 2283 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2284 | { |
2285 | struct in6_ifreq ireq; | |
2286 | int err; | |
1ab1457c | 2287 | |
1da177e4 LT |
2288 | if (!capable(CAP_NET_ADMIN)) |
2289 | return -EPERM; | |
1ab1457c | 2290 | |
1da177e4 LT |
2291 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2292 | return -EFAULT; | |
2293 | ||
2294 | rtnl_lock(); | |
af284937 DL |
2295 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2296 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2297 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2298 | rtnl_unlock(); |
2299 | return err; | |
2300 | } | |
2301 | ||
af284937 | 2302 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2303 | { |
2304 | struct in6_ifreq ireq; | |
2305 | int err; | |
1ab1457c | 2306 | |
1da177e4 LT |
2307 | if (!capable(CAP_NET_ADMIN)) |
2308 | return -EPERM; | |
2309 | ||
2310 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2311 | return -EFAULT; | |
2312 | ||
2313 | rtnl_lock(); | |
af284937 DL |
2314 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2315 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2316 | rtnl_unlock(); |
2317 | return err; | |
2318 | } | |
2319 | ||
b5f348e5 IJ |
2320 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2321 | int plen, int scope) | |
2322 | { | |
2323 | struct inet6_ifaddr *ifp; | |
2324 | ||
2325 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2326 | if (!IS_ERR(ifp)) { | |
2327 | spin_lock_bh(&ifp->lock); | |
2328 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2329 | spin_unlock_bh(&ifp->lock); | |
2330 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2331 | in6_ifa_put(ifp); | |
2332 | } | |
2333 | } | |
2334 | ||
0be669bb | 2335 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2336 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2337 | { | |
1da177e4 LT |
2338 | struct in6_addr addr; |
2339 | struct net_device *dev; | |
c346dca1 | 2340 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2341 | int scope; |
2342 | ||
2343 | ASSERT_RTNL(); | |
2344 | ||
2345 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2346 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2347 | ||
2348 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2349 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2350 | scope = IFA_LINK; | |
2351 | } else { | |
2352 | scope = IPV6_ADDR_COMPATv4; | |
2353 | } | |
2354 | ||
2355 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2356 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2357 | return; |
2358 | } | |
2359 | ||
6fda7350 | 2360 | for_each_netdev(net, dev) { |
8e5e8f30 | 2361 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2362 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2363 | struct in_ifaddr *ifa; |
1da177e4 LT |
2364 | |
2365 | int flag = scope; | |
2366 | ||
2367 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2368 | int plen; | |
2369 | ||
2370 | addr.s6_addr32[3] = ifa->ifa_local; | |
2371 | ||
2372 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2373 | continue; | |
2374 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2375 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2376 | continue; | |
2377 | flag |= IFA_HOST; | |
2378 | } | |
2379 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2380 | plen = 64; | |
2381 | else | |
2382 | plen = 96; | |
2383 | ||
b5f348e5 | 2384 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2385 | } |
2386 | } | |
1ab1457c | 2387 | } |
1da177e4 | 2388 | } |
0be669bb | 2389 | #endif |
1da177e4 LT |
2390 | |
2391 | static void init_loopback(struct net_device *dev) | |
2392 | { | |
2393 | struct inet6_dev *idev; | |
1da177e4 LT |
2394 | |
2395 | /* ::1 */ | |
2396 | ||
2397 | ASSERT_RTNL(); | |
2398 | ||
2399 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2400 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2401 | return; |
2402 | } | |
2403 | ||
b5f348e5 | 2404 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2405 | } |
2406 | ||
b71d1d42 | 2407 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2408 | { |
8e5e8f30 | 2409 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2410 | u32 addr_flags = IFA_F_PERMANENT; |
2411 | ||
2412 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2413 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2414 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2415 | addr_flags |= IFA_F_OPTIMISTIC; |
2416 | #endif | |
1da177e4 | 2417 | |
95c385b4 NH |
2418 | |
2419 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2420 | if (!IS_ERR(ifp)) { |
46d48046 | 2421 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2422 | addrconf_dad_start(ifp); |
1da177e4 LT |
2423 | in6_ifa_put(ifp); |
2424 | } | |
2425 | } | |
2426 | ||
2427 | static void addrconf_dev_config(struct net_device *dev) | |
2428 | { | |
2429 | struct in6_addr addr; | |
8e5e8f30 | 2430 | struct inet6_dev *idev; |
1da177e4 LT |
2431 | |
2432 | ASSERT_RTNL(); | |
2433 | ||
74235a25 HX |
2434 | if ((dev->type != ARPHRD_ETHER) && |
2435 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2436 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2437 | (dev->type != ARPHRD_INFINIBAND) && |
2438 | (dev->type != ARPHRD_IEEE802154)) { | |
74235a25 HX |
2439 | /* Alas, we support only Ethernet autoconfiguration. */ |
2440 | return; | |
2441 | } | |
2442 | ||
1da177e4 | 2443 | idev = addrconf_add_dev(dev); |
64e724f6 | 2444 | if (IS_ERR(idev)) |
1da177e4 LT |
2445 | return; |
2446 | ||
2447 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2448 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2449 | ||
2450 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2451 | addrconf_add_linklocal(idev, &addr); | |
2452 | } | |
2453 | ||
0be669bb | 2454 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2455 | static void addrconf_sit_config(struct net_device *dev) |
2456 | { | |
2457 | struct inet6_dev *idev; | |
2458 | ||
2459 | ASSERT_RTNL(); | |
2460 | ||
1ab1457c YH |
2461 | /* |
2462 | * Configure the tunnel with one of our IPv4 | |
2463 | * addresses... we should configure all of | |
1da177e4 LT |
2464 | * our v4 addrs in the tunnel |
2465 | */ | |
2466 | ||
2467 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2468 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2469 | return; |
2470 | } | |
2471 | ||
c7dc89c0 FT |
2472 | if (dev->priv_flags & IFF_ISATAP) { |
2473 | struct in6_addr addr; | |
2474 | ||
2475 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2476 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2477 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2478 | addrconf_add_linklocal(idev, &addr); | |
2479 | return; | |
2480 | } | |
2481 | ||
1da177e4 LT |
2482 | sit_add_v4_addrs(idev); |
2483 | ||
2484 | if (dev->flags&IFF_POINTOPOINT) { | |
2485 | addrconf_add_mroute(dev); | |
2486 | addrconf_add_lroute(dev); | |
2487 | } else | |
2488 | sit_route_add(dev); | |
2489 | } | |
0be669bb | 2490 | #endif |
1da177e4 | 2491 | |
aee80b54 | 2492 | #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) |
2493 | static void addrconf_gre_config(struct net_device *dev) | |
2494 | { | |
2495 | struct inet6_dev *idev; | |
2496 | struct in6_addr addr; | |
2497 | ||
f3213831 | 2498 | pr_info("%s(%s)\n", __func__, dev->name); |
aee80b54 | 2499 | |
2500 | ASSERT_RTNL(); | |
2501 | ||
2502 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2503 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2504 | return; |
2505 | } | |
2506 | ||
2507 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2508 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2509 | ||
2510 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2511 | addrconf_add_linklocal(idev, &addr); | |
2512 | } | |
2513 | #endif | |
2514 | ||
1da177e4 LT |
2515 | static inline int |
2516 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2517 | { | |
2518 | struct in6_addr lladdr; | |
2519 | ||
95c385b4 | 2520 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2521 | addrconf_add_linklocal(idev, &lladdr); |
2522 | return 0; | |
2523 | } | |
2524 | return -1; | |
2525 | } | |
2526 | ||
2527 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2528 | { | |
2529 | struct net_device *link_dev; | |
c346dca1 | 2530 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2531 | |
2532 | /* first try to inherit the link-local address from the link device */ | |
2533 | if (idev->dev->iflink && | |
6fda7350 | 2534 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2535 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2536 | return; | |
2537 | } | |
2538 | /* then try to inherit it from any device */ | |
6fda7350 | 2539 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2540 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2541 | return; | |
2542 | } | |
91df42be | 2543 | pr_debug("init ip6-ip6: add_linklocal failed\n"); |
1da177e4 LT |
2544 | } |
2545 | ||
2546 | /* | |
2547 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2548 | * DHCPv6, MLD etc. can be run over the virtual link | |
2549 | */ | |
2550 | ||
2551 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2552 | { | |
2553 | struct inet6_dev *idev; | |
2554 | ||
2555 | ASSERT_RTNL(); | |
2556 | ||
e21e8467 | 2557 | idev = addrconf_add_dev(dev); |
64e724f6 | 2558 | if (IS_ERR(idev)) { |
91df42be | 2559 | pr_debug("init ip6-ip6: add_dev failed\n"); |
1da177e4 LT |
2560 | return; |
2561 | } | |
2562 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2563 | } |
2564 | ||
1ab1457c | 2565 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
8e5e8f30 | 2566 | void *data) |
1da177e4 LT |
2567 | { |
2568 | struct net_device *dev = (struct net_device *) data; | |
0115e8e3 | 2569 | struct inet6_dev *idev; |
c5e33bdd | 2570 | int run_pending = 0; |
b217d616 | 2571 | int err; |
1da177e4 | 2572 | |
0115e8e3 ED |
2573 | if (event == NETDEV_UNREGISTER_FINAL) |
2574 | return NOTIFY_DONE; | |
2575 | ||
2576 | idev = __in6_dev_get(dev); | |
e21e8467 | 2577 | switch (event) { |
45ba9dd2 | 2578 | case NETDEV_REGISTER: |
74235a25 | 2579 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2580 | idev = ipv6_add_dev(dev); |
2581 | if (!idev) | |
b217d616 | 2582 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2583 | } |
2584 | break; | |
bcdd553f | 2585 | |
1da177e4 | 2586 | case NETDEV_UP: |
3c21edbd | 2587 | case NETDEV_CHANGE: |
c2edacf8 JV |
2588 | if (dev->flags & IFF_SLAVE) |
2589 | break; | |
2590 | ||
3c21edbd | 2591 | if (event == NETDEV_UP) { |
f24e3d65 | 2592 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2593 | /* device is not ready yet. */ |
f3213831 | 2594 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2595 | dev->name); |
2596 | break; | |
2597 | } | |
99081049 | 2598 | |
d31c7b8f EP |
2599 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2600 | idev = ipv6_add_dev(dev); | |
2601 | ||
e3ec6cfc | 2602 | if (idev) { |
99081049 | 2603 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2604 | run_pending = 1; |
2605 | } | |
3c21edbd | 2606 | } else { |
f24e3d65 | 2607 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2608 | /* device is still not ready. */ |
2609 | break; | |
2610 | } | |
2611 | ||
2612 | if (idev) { | |
bcdd553f | 2613 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2614 | /* device is already configured. */ |
2615 | break; | |
3c21edbd YH |
2616 | idev->if_flags |= IF_READY; |
2617 | } | |
2618 | ||
f3213831 JP |
2619 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2620 | dev->name); | |
3c21edbd | 2621 | |
c5e33bdd | 2622 | run_pending = 1; |
3c21edbd YH |
2623 | } |
2624 | ||
e21e8467 | 2625 | switch (dev->type) { |
0be669bb | 2626 | #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4 LT |
2627 | case ARPHRD_SIT: |
2628 | addrconf_sit_config(dev); | |
2629 | break; | |
aee80b54 | 2630 | #endif |
2631 | #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) | |
2632 | case ARPHRD_IPGRE: | |
2633 | addrconf_gre_config(dev); | |
2634 | break; | |
0be669bb | 2635 | #endif |
1da177e4 LT |
2636 | case ARPHRD_TUNNEL6: |
2637 | addrconf_ip6_tnl_config(dev); | |
2638 | break; | |
2639 | case ARPHRD_LOOPBACK: | |
2640 | init_loopback(dev); | |
2641 | break; | |
2642 | ||
2643 | default: | |
2644 | addrconf_dev_config(dev); | |
2645 | break; | |
3ff50b79 | 2646 | } |
bcdd553f | 2647 | |
1da177e4 | 2648 | if (idev) { |
c5e33bdd YH |
2649 | if (run_pending) |
2650 | addrconf_dad_run(idev); | |
2651 | ||
bcdd553f SH |
2652 | /* |
2653 | * If the MTU changed during the interface down, | |
2654 | * when the interface up, the changed MTU must be | |
2655 | * reflected in the idev as well as routers. | |
1da177e4 | 2656 | */ |
bcdd553f SH |
2657 | if (idev->cnf.mtu6 != dev->mtu && |
2658 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2659 | rt6_mtu_change(dev, dev->mtu); |
2660 | idev->cnf.mtu6 = dev->mtu; | |
2661 | } | |
2662 | idev->tstamp = jiffies; | |
2663 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2664 | |
2665 | /* | |
2666 | * If the changed mtu during down is lower than | |
2667 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2668 | */ |
2669 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2670 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2671 | } |
2672 | break; | |
2673 | ||
2674 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2675 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2676 | rt6_mtu_change(dev, dev->mtu); |
2677 | idev->cnf.mtu6 = dev->mtu; | |
2678 | break; | |
2679 | } | |
2680 | ||
d31c7b8f EP |
2681 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2682 | idev = ipv6_add_dev(dev); | |
2683 | if (idev) | |
2684 | break; | |
2685 | } | |
2686 | ||
bcdd553f SH |
2687 | /* |
2688 | * MTU falled under IPV6_MIN_MTU. | |
2689 | * Stop IPv6 on this interface. | |
2690 | */ | |
1da177e4 LT |
2691 | |
2692 | case NETDEV_DOWN: | |
2693 | case NETDEV_UNREGISTER: | |
2694 | /* | |
2695 | * Remove all addresses from this interface. | |
2696 | */ | |
2697 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2698 | break; | |
3c21edbd | 2699 | |
1da177e4 | 2700 | case NETDEV_CHANGENAME: |
1da177e4 | 2701 | if (idev) { |
5632c515 | 2702 | snmp6_unregister_dev(idev); |
408c4768 | 2703 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2704 | addrconf_sysctl_register(idev); |
b217d616 HX |
2705 | err = snmp6_register_dev(idev); |
2706 | if (err) | |
2707 | return notifier_from_errno(err); | |
5632c515 | 2708 | } |
1da177e4 | 2709 | break; |
bcdd553f | 2710 | |
93d9b7d7 JP |
2711 | case NETDEV_PRE_TYPE_CHANGE: |
2712 | case NETDEV_POST_TYPE_CHANGE: | |
2713 | addrconf_type_change(dev, event); | |
75c78500 | 2714 | break; |
3ff50b79 | 2715 | } |
1da177e4 LT |
2716 | |
2717 | return NOTIFY_OK; | |
2718 | } | |
2719 | ||
2720 | /* | |
2721 | * addrconf module should be notified of a device going up | |
2722 | */ | |
2723 | static struct notifier_block ipv6_dev_notf = { | |
2724 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2725 | }; |
2726 | ||
93d9b7d7 | 2727 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2728 | { |
2729 | struct inet6_dev *idev; | |
2730 | ASSERT_RTNL(); | |
2731 | ||
2732 | idev = __in6_dev_get(dev); | |
2733 | ||
93d9b7d7 | 2734 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2735 | ipv6_mc_remap(idev); |
93d9b7d7 | 2736 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2737 | ipv6_mc_unmap(idev); |
2738 | } | |
2739 | ||
1da177e4 LT |
2740 | static int addrconf_ifdown(struct net_device *dev, int how) |
2741 | { | |
c346dca1 | 2742 | struct net *net = dev_net(dev); |
502a2ffd | 2743 | struct inet6_dev *idev; |
2744 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 2745 | int state, i; |
1da177e4 LT |
2746 | |
2747 | ASSERT_RTNL(); | |
2748 | ||
73a8bd74 DM |
2749 | rt6_ifdown(net, dev); |
2750 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
2751 | |
2752 | idev = __in6_dev_get(dev); | |
2753 | if (idev == NULL) | |
2754 | return -ENODEV; | |
2755 | ||
bcdd553f SH |
2756 | /* |
2757 | * Step 1: remove reference to ipv6 device from parent device. | |
2758 | * Do not dev_put! | |
1da177e4 | 2759 | */ |
439e2385 | 2760 | if (how) { |
1da177e4 | 2761 | idev->dead = 1; |
8814c4b5 YH |
2762 | |
2763 | /* protected by rtnl_lock */ | |
a9b3cd7f | 2764 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
2765 | |
2766 | /* Step 1.5: remove snmp6 entry */ | |
2767 | snmp6_unregister_dev(idev); | |
2768 | ||
2769 | } | |
2770 | ||
73a8bd74 DM |
2771 | /* Step 2: clear hash table */ |
2772 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
2773 | struct hlist_head *h = &inet6_addr_lst[i]; | |
2774 | struct hlist_node *n; | |
2775 | ||
2776 | spin_lock_bh(&addrconf_hash_lock); | |
2777 | restart: | |
2778 | hlist_for_each_entry_rcu(ifa, n, h, addr_lst) { | |
2779 | if (ifa->idev == idev) { | |
2780 | hlist_del_init_rcu(&ifa->addr_lst); | |
2781 | addrconf_del_timer(ifa); | |
2782 | goto restart; | |
2783 | } | |
2784 | } | |
2785 | spin_unlock_bh(&addrconf_hash_lock); | |
2786 | } | |
2787 | ||
1da177e4 LT |
2788 | write_lock_bh(&idev->lock); |
2789 | ||
bcdd553f | 2790 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2791 | if (!how) |
3c21edbd | 2792 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2793 | |
1da177e4 | 2794 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 2795 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2796 | in6_dev_put(idev); |
2797 | ||
bcdd553f | 2798 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2799 | while (!list_empty(&idev->tempaddr_list)) { |
2800 | ifa = list_first_entry(&idev->tempaddr_list, | |
2801 | struct inet6_ifaddr, tmp_list); | |
2802 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2803 | write_unlock_bh(&idev->lock); |
2804 | spin_lock_bh(&ifa->lock); | |
2805 | ||
2806 | if (ifa->ifpub) { | |
2807 | in6_ifa_put(ifa->ifpub); | |
2808 | ifa->ifpub = NULL; | |
2809 | } | |
2810 | spin_unlock_bh(&ifa->lock); | |
2811 | in6_ifa_put(ifa); | |
2812 | write_lock_bh(&idev->lock); | |
2813 | } | |
2814 | #endif | |
8f37ada5 | 2815 | |
502a2ffd | 2816 | while (!list_empty(&idev->addr_list)) { |
2817 | ifa = list_first_entry(&idev->addr_list, | |
2818 | struct inet6_ifaddr, if_list); | |
84e8b803 | 2819 | addrconf_del_timer(ifa); |
2820 | ||
73a8bd74 | 2821 | list_del(&ifa->if_list); |
84e8b803 | 2822 | |
73a8bd74 | 2823 | write_unlock_bh(&idev->lock); |
84e8b803 | 2824 | |
73a8bd74 DM |
2825 | spin_lock_bh(&ifa->state_lock); |
2826 | state = ifa->state; | |
2827 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
2828 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 2829 | |
73a8bd74 DM |
2830 | if (state != INET6_IFADDR_STATE_DEAD) { |
2831 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2832 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); | |
27bdb2ab | 2833 | } |
73a8bd74 | 2834 | in6_ifa_put(ifa); |
8f37ada5 | 2835 | |
73a8bd74 DM |
2836 | write_lock_bh(&idev->lock); |
2837 | } | |
8f37ada5 | 2838 | |
1da177e4 LT |
2839 | write_unlock_bh(&idev->lock); |
2840 | ||
2841 | /* Step 5: Discard multicast list */ | |
439e2385 | 2842 | if (how) |
1da177e4 LT |
2843 | ipv6_mc_destroy_dev(idev); |
2844 | else | |
2845 | ipv6_mc_down(idev); | |
2846 | ||
1da177e4 | 2847 | idev->tstamp = jiffies; |
1ab1457c | 2848 | |
bcdd553f | 2849 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 2850 | if (how) { |
408c4768 | 2851 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2852 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2853 | neigh_ifdown(&nd_tbl, dev); | |
2854 | in6_dev_put(idev); | |
2855 | } | |
2856 | return 0; | |
2857 | } | |
2858 | ||
2859 | static void addrconf_rs_timer(unsigned long data) | |
2860 | { | |
2861 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2862 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2863 | |
5b2a1953 | 2864 | read_lock(&idev->lock); |
2865 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
2866 | goto out; |
2867 | ||
5b2a1953 | 2868 | if (idev->cnf.forwarding) |
2869 | goto out; | |
2870 | ||
2871 | /* Announcement received after solicitation was sent */ | |
2872 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 2873 | goto out; |
1da177e4 LT |
2874 | |
2875 | spin_lock(&ifp->lock); | |
5b2a1953 | 2876 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
2877 | /* The wait after the last probe can be shorter */ |
2878 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 2879 | (ifp->probes == idev->cnf.rtr_solicits) ? |
2880 | idev->cnf.rtr_solicit_delay : | |
2881 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
2882 | spin_unlock(&ifp->lock); |
2883 | ||
5b2a1953 | 2884 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
2885 | } else { |
2886 | spin_unlock(&ifp->lock); | |
2887 | /* | |
2888 | * Note: we do not support deprecated "all on-link" | |
2889 | * assumption any longer. | |
2890 | */ | |
91df42be | 2891 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
2892 | } |
2893 | ||
2894 | out: | |
5b2a1953 | 2895 | read_unlock(&idev->lock); |
1da177e4 LT |
2896 | in6_ifa_put(ifp); |
2897 | } | |
2898 | ||
2899 | /* | |
2900 | * Duplicate Address Detection | |
2901 | */ | |
3c21edbd YH |
2902 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
2903 | { | |
2904 | unsigned long rand_num; | |
2905 | struct inet6_dev *idev = ifp->idev; | |
2906 | ||
95c385b4 NH |
2907 | if (ifp->flags & IFA_F_OPTIMISTIC) |
2908 | rand_num = 0; | |
2909 | else | |
2910 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
2911 | ||
3c21edbd YH |
2912 | ifp->probes = idev->cnf.dad_transmits; |
2913 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
2914 | } | |
2915 | ||
cf22f9a2 | 2916 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2917 | { |
2918 | struct inet6_dev *idev = ifp->idev; | |
2919 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
2920 | |
2921 | addrconf_join_solict(dev, &ifp->addr); | |
2922 | ||
1da177e4 | 2923 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
2924 | |
2925 | read_lock_bh(&idev->lock); | |
622ccdf1 | 2926 | spin_lock(&ifp->lock); |
e9d3e084 | 2927 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 2928 | goto out; |
1da177e4 LT |
2929 | |
2930 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 2931 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
2932 | !(ifp->flags&IFA_F_TENTATIVE) || |
2933 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 2934 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2935 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2936 | read_unlock_bh(&idev->lock); |
2937 | ||
2938 | addrconf_dad_completed(ifp); | |
2939 | return; | |
2940 | } | |
2941 | ||
6732bade | 2942 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 2943 | spin_unlock(&ifp->lock); |
6732bade | 2944 | read_unlock_bh(&idev->lock); |
3c21edbd | 2945 | /* |
590a9887 | 2946 | * If the device is not ready: |
3c21edbd YH |
2947 | * - keep it tentative if it is a permanent address. |
2948 | * - otherwise, kill it. | |
2949 | */ | |
2950 | in6_ifa_hold(ifp); | |
cc411d0b | 2951 | addrconf_dad_stop(ifp, 0); |
6732bade | 2952 | return; |
3c21edbd | 2953 | } |
95c385b4 NH |
2954 | |
2955 | /* | |
2956 | * Optimistic nodes can start receiving | |
2957 | * Frames right away | |
2958 | */ | |
e21e8467 | 2959 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
2960 | ip6_ins_rt(ifp->rt); |
2961 | ||
6732bade | 2962 | addrconf_dad_kick(ifp); |
1da177e4 | 2963 | out: |
622ccdf1 | 2964 | spin_unlock(&ifp->lock); |
1da177e4 LT |
2965 | read_unlock_bh(&idev->lock); |
2966 | } | |
2967 | ||
2968 | static void addrconf_dad_timer(unsigned long data) | |
2969 | { | |
2970 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
2971 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
2972 | struct in6_addr mcaddr; |
2973 | ||
f2344a13 HX |
2974 | if (!ifp->probes && addrconf_dad_end(ifp)) |
2975 | goto out; | |
2976 | ||
122e4519 | 2977 | read_lock(&idev->lock); |
2978 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
2979 | read_unlock(&idev->lock); | |
1da177e4 LT |
2980 | goto out; |
2981 | } | |
21809faf | 2982 | |
2983 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
2984 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
2985 | spin_unlock(&ifp->lock); | |
2986 | read_unlock(&idev->lock); | |
2987 | goto out; | |
2988 | } | |
2989 | ||
1da177e4 LT |
2990 | if (ifp->probes == 0) { |
2991 | /* | |
2992 | * DAD was successful | |
2993 | */ | |
2994 | ||
cc411d0b | 2995 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 2996 | spin_unlock(&ifp->lock); |
122e4519 | 2997 | read_unlock(&idev->lock); |
1da177e4 LT |
2998 | |
2999 | addrconf_dad_completed(ifp); | |
3000 | ||
3001 | goto out; | |
3002 | } | |
3003 | ||
3004 | ifp->probes--; | |
3005 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 3006 | spin_unlock(&ifp->lock); |
122e4519 | 3007 | read_unlock(&idev->lock); |
1da177e4 LT |
3008 | |
3009 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3010 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3011 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3012 | out: |
3013 | in6_ifa_put(ifp); | |
3014 | } | |
3015 | ||
3016 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3017 | { | |
e21e8467 | 3018 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
3019 | |
3020 | /* | |
3021 | * Configure the address for reception. Now it is valid. | |
3022 | */ | |
3023 | ||
3024 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3025 | ||
026359bc TA |
3026 | /* If added prefix is link local and we are prepared to process |
3027 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3028 | */ |
3029 | ||
026359bc TA |
3030 | if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) || |
3031 | ifp->idev->cnf.accept_ra == 2) && | |
1da177e4 LT |
3032 | ifp->idev->cnf.rtr_solicits > 0 && |
3033 | (dev->flags&IFF_LOOPBACK) == 0 && | |
3034 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
3035 | /* |
3036 | * If a host as already performed a random delay | |
3037 | * [...] as part of DAD [...] there is no need | |
3038 | * to delay again before sending the first RS | |
3039 | */ | |
f3ee4010 | 3040 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
3041 | |
3042 | spin_lock_bh(&ifp->lock); | |
3043 | ifp->probes = 1; | |
3044 | ifp->idev->if_flags |= IF_RS_SENT; | |
3045 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
3046 | spin_unlock_bh(&ifp->lock); | |
3047 | } | |
3048 | } | |
3049 | ||
e21e8467 SH |
3050 | static void addrconf_dad_run(struct inet6_dev *idev) |
3051 | { | |
c5e33bdd YH |
3052 | struct inet6_ifaddr *ifp; |
3053 | ||
3054 | read_lock_bh(&idev->lock); | |
502a2ffd | 3055 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3056 | spin_lock(&ifp->lock); |
f2344a13 HX |
3057 | if (ifp->flags & IFA_F_TENTATIVE && |
3058 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3059 | addrconf_dad_kick(ifp); | |
21809faf | 3060 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3061 | } |
3062 | read_unlock_bh(&idev->lock); | |
3063 | } | |
3064 | ||
1da177e4 LT |
3065 | #ifdef CONFIG_PROC_FS |
3066 | struct if6_iter_state { | |
3c40090a | 3067 | struct seq_net_private p; |
1da177e4 | 3068 | int bucket; |
1d578303 | 3069 | int offset; |
1da177e4 LT |
3070 | }; |
3071 | ||
1d578303 | 3072 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3073 | { |
3074 | struct inet6_ifaddr *ifa = NULL; | |
3075 | struct if6_iter_state *state = seq->private; | |
1218854a | 3076 | struct net *net = seq_file_net(seq); |
1d578303 | 3077 | int p = 0; |
1da177e4 | 3078 | |
1d578303 MM |
3079 | /* initial bucket if pos is 0 */ |
3080 | if (pos == 0) { | |
3081 | state->bucket = 0; | |
3082 | state->offset = 0; | |
3083 | } | |
3084 | ||
3085 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
c2e21293 | 3086 | struct hlist_node *n; |
4f70ecca | 3087 | hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket], |
1d578303 MM |
3088 | addr_lst) { |
3089 | /* sync with offset */ | |
3090 | if (p < state->offset) { | |
3091 | p++; | |
3092 | continue; | |
3093 | } | |
3094 | state->offset++; | |
c2e21293 | 3095 | if (net_eq(dev_net(ifa->idev->dev), net)) |
3096 | return ifa; | |
1d578303 MM |
3097 | } |
3098 | ||
3099 | /* prepare for next bucket */ | |
3100 | state->offset = 0; | |
3101 | p = 0; | |
1da177e4 | 3102 | } |
c2e21293 | 3103 | return NULL; |
1da177e4 LT |
3104 | } |
3105 | ||
c2e21293 | 3106 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3107 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3108 | { |
3109 | struct if6_iter_state *state = seq->private; | |
1218854a | 3110 | struct net *net = seq_file_net(seq); |
c2e21293 | 3111 | struct hlist_node *n = &ifa->addr_lst; |
1da177e4 | 3112 | |
1d578303 MM |
3113 | hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) { |
3114 | state->offset++; | |
c2e21293 | 3115 | if (net_eq(dev_net(ifa->idev->dev), net)) |
3116 | return ifa; | |
1d578303 | 3117 | } |
3c40090a | 3118 | |
c2e21293 | 3119 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3120 | state->offset = 0; |
4f70ecca | 3121 | hlist_for_each_entry_rcu_bh(ifa, n, |
c2e21293 | 3122 | &inet6_addr_lst[state->bucket], addr_lst) { |
1d578303 | 3123 | state->offset++; |
c2e21293 | 3124 | if (net_eq(dev_net(ifa->idev->dev), net)) |
3125 | return ifa; | |
3126 | } | |
1da177e4 | 3127 | } |
3c40090a | 3128 | |
c2e21293 | 3129 | return NULL; |
1da177e4 LT |
3130 | } |
3131 | ||
1da177e4 | 3132 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3133 | __acquires(rcu_bh) |
1da177e4 | 3134 | { |
5c578aed | 3135 | rcu_read_lock_bh(); |
1d578303 | 3136 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3137 | } |
3138 | ||
3139 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3140 | { | |
3141 | struct inet6_ifaddr *ifa; | |
3142 | ||
3143 | ifa = if6_get_next(seq, v); | |
3144 | ++*pos; | |
3145 | return ifa; | |
3146 | } | |
3147 | ||
3148 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3149 | __releases(rcu_bh) |
1da177e4 | 3150 | { |
5c578aed | 3151 | rcu_read_unlock_bh(); |
1da177e4 LT |
3152 | } |
3153 | ||
3154 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3155 | { | |
3156 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3157 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3158 | &ifp->addr, |
1da177e4 LT |
3159 | ifp->idev->dev->ifindex, |
3160 | ifp->prefix_len, | |
3161 | ifp->scope, | |
3162 | ifp->flags, | |
3163 | ifp->idev->dev->name); | |
3164 | return 0; | |
3165 | } | |
3166 | ||
56b3d975 | 3167 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3168 | .start = if6_seq_start, |
3169 | .next = if6_seq_next, | |
3170 | .show = if6_seq_show, | |
3171 | .stop = if6_seq_stop, | |
3172 | }; | |
3173 | ||
3174 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3175 | { | |
3c40090a DL |
3176 | return seq_open_net(inode, file, &if6_seq_ops, |
3177 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3178 | } |
3179 | ||
9a32144e | 3180 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3181 | .owner = THIS_MODULE, |
3182 | .open = if6_seq_open, | |
3183 | .read = seq_read, | |
3184 | .llseek = seq_lseek, | |
3c40090a | 3185 | .release = seq_release_net, |
1da177e4 LT |
3186 | }; |
3187 | ||
2c8c1e72 | 3188 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3189 | { |
3c40090a | 3190 | if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4 LT |
3191 | return -ENOMEM; |
3192 | return 0; | |
3193 | } | |
3194 | ||
2c8c1e72 | 3195 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a DL |
3196 | { |
3197 | proc_net_remove(net, "if_inet6"); | |
3198 | } | |
3199 | ||
3200 | static struct pernet_operations if6_proc_net_ops = { | |
3201 | .init = if6_proc_net_init, | |
3202 | .exit = if6_proc_net_exit, | |
3203 | }; | |
3204 | ||
3205 | int __init if6_proc_init(void) | |
3206 | { | |
3207 | return register_pernet_subsys(&if6_proc_net_ops); | |
3208 | } | |
3209 | ||
1da177e4 LT |
3210 | void if6_proc_exit(void) |
3211 | { | |
3c40090a | 3212 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3213 | } |
3214 | #endif /* CONFIG_PROC_FS */ | |
3215 | ||
59fbb3a6 | 3216 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c | 3217 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3218 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3219 | { |
3220 | int ret = 0; | |
c2e21293 | 3221 | struct inet6_ifaddr *ifp = NULL; |
3222 | struct hlist_node *n; | |
ddbe5032 | 3223 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3224 | |
5c578aed | 3225 | rcu_read_lock_bh(); |
4f70ecca | 3226 | hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3227 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3228 | continue; |
caad295f | 3229 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3230 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3231 | ret = 1; | |
3232 | break; | |
3233 | } | |
3234 | } | |
5c578aed | 3235 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3236 | return ret; |
3237 | } | |
3238 | #endif | |
3239 | ||
1da177e4 LT |
3240 | /* |
3241 | * Periodic address status verification | |
3242 | */ | |
3243 | ||
3244 | static void addrconf_verify(unsigned long foo) | |
3245 | { | |
b2db7564 | 3246 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3247 | struct inet6_ifaddr *ifp; |
c2e21293 | 3248 | struct hlist_node *node; |
1da177e4 LT |
3249 | int i; |
3250 | ||
5c578aed | 3251 | rcu_read_lock_bh(); |
3252 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3253 | now = jiffies; |
b2db7564 | 3254 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3255 | |
3256 | del_timer(&addr_chk_timer); | |
3257 | ||
bcdd553f | 3258 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3259 | restart: |
4f70ecca | 3260 | hlist_for_each_entry_rcu_bh(ifp, node, |
5c578aed | 3261 | &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3262 | unsigned long age; |
1da177e4 LT |
3263 | |
3264 | if (ifp->flags & IFA_F_PERMANENT) | |
3265 | continue; | |
3266 | ||
3267 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3268 | /* We try to batch several events at once. */ |
3269 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3270 | |
8f27ebb9 YH |
3271 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3272 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3273 | spin_unlock(&ifp->lock); |
3274 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3275 | ipv6_del_addr(ifp); |
3276 | goto restart; | |
8f27ebb9 YH |
3277 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3278 | spin_unlock(&ifp->lock); | |
3279 | continue; | |
1da177e4 | 3280 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3281 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3282 | int deprecate = 0; |
3283 | ||
3284 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3285 | deprecate = 1; | |
3286 | ifp->flags |= IFA_F_DEPRECATED; | |
3287 | } | |
3288 | ||
3289 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3290 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3291 | ||
3292 | spin_unlock(&ifp->lock); | |
3293 | ||
3294 | if (deprecate) { | |
3295 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3296 | |
3297 | ipv6_ifa_notify(0, ifp); | |
3298 | in6_ifa_put(ifp); | |
3299 | goto restart; | |
3300 | } | |
3301 | #ifdef CONFIG_IPV6_PRIVACY | |
3302 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3303 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3304 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3305 | ifp->idev->cnf.dad_transmits * | |
3306 | ifp->idev->nd_parms->retrans_time / HZ; | |
3307 | ||
1da177e4 LT |
3308 | if (age >= ifp->prefered_lft - regen_advance) { |
3309 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3310 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3311 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3312 | if (!ifp->regen_count && ifpub) { | |
3313 | ifp->regen_count++; | |
3314 | in6_ifa_hold(ifp); | |
3315 | in6_ifa_hold(ifpub); | |
3316 | spin_unlock(&ifp->lock); | |
5c578aed | 3317 | |
291d809b HY |
3318 | spin_lock(&ifpub->lock); |
3319 | ifpub->regen_count = 0; | |
3320 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3321 | ipv6_create_tempaddr(ifpub, ifp); |
3322 | in6_ifa_put(ifpub); | |
3323 | in6_ifa_put(ifp); | |
3324 | goto restart; | |
3325 | } | |
3326 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3327 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3328 | spin_unlock(&ifp->lock); | |
3329 | #endif | |
3330 | } else { | |
3331 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3332 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3333 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3334 | spin_unlock(&ifp->lock); | |
3335 | } | |
3336 | } | |
1da177e4 LT |
3337 | } |
3338 | ||
b2db7564 YH |
3339 | next_sec = round_jiffies_up(next); |
3340 | next_sched = next; | |
3341 | ||
3342 | /* If rounded timeout is accurate enough, accept it. */ | |
3343 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3344 | next_sched = next_sec; | |
3345 | ||
3346 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3347 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3348 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3349 | ||
3350 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3351 | now, next, next_sec, next_sched)); | |
3352 | ||
3353 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3354 | add_timer(&addr_chk_timer); |
5c578aed | 3355 | spin_unlock(&addrconf_verify_lock); |
3356 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3357 | } |
3358 | ||
461d8837 TG |
3359 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3360 | { | |
3361 | struct in6_addr *pfx = NULL; | |
3362 | ||
3363 | if (addr) | |
3364 | pfx = nla_data(addr); | |
3365 | ||
3366 | if (local) { | |
3367 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3368 | pfx = NULL; | |
3369 | else | |
3370 | pfx = nla_data(local); | |
3371 | } | |
3372 | ||
3373 | return pfx; | |
3374 | } | |
3375 | ||
ef7c79ed | 3376 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3377 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3378 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3379 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3380 | }; | |
3381 | ||
1da177e4 LT |
3382 | static int |
3383 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3384 | { | |
3b1e0a65 | 3385 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3386 | struct ifaddrmsg *ifm; |
3387 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3388 | struct in6_addr *pfx; |
b933f716 | 3389 | int err; |
1da177e4 | 3390 | |
b933f716 TG |
3391 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3392 | if (err < 0) | |
3393 | return err; | |
3394 | ||
3395 | ifm = nlmsg_data(nlh); | |
3396 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3397 | if (pfx == NULL) |
3398 | return -EINVAL; | |
3399 | ||
af284937 | 3400 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3401 | } |
3402 | ||
55ebaef1 NT |
3403 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3404 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3405 | { |
6f704992 YH |
3406 | u32 flags; |
3407 | clock_t expires; | |
4bed72e4 | 3408 | unsigned long timeout; |
46d48046 | 3409 | |
081bba5b NT |
3410 | if (!valid_lft || (prefered_lft > valid_lft)) |
3411 | return -EINVAL; | |
3412 | ||
4bed72e4 YH |
3413 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3414 | if (addrconf_finite_timeout(timeout)) { | |
3415 | expires = jiffies_to_clock_t(timeout * HZ); | |
3416 | valid_lft = timeout; | |
6f704992 | 3417 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3418 | } else { |
3419 | expires = 0; | |
3420 | flags = 0; | |
3421 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3422 | } |
081bba5b | 3423 | |
4bed72e4 YH |
3424 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3425 | if (addrconf_finite_timeout(timeout)) { | |
3426 | if (timeout == 0) | |
3427 | ifa_flags |= IFA_F_DEPRECATED; | |
3428 | prefered_lft = timeout; | |
3429 | } | |
081bba5b NT |
3430 | |
3431 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3432 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3433 | ifp->tstamp = jiffies; |
3434 | ifp->valid_lft = valid_lft; | |
3435 | ifp->prefered_lft = prefered_lft; | |
3436 | ||
3437 | spin_unlock_bh(&ifp->lock); | |
3438 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3439 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3440 | |
46d48046 | 3441 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3442 | expires, flags); |
081bba5b NT |
3443 | addrconf_verify(0); |
3444 | ||
3445 | return 0; | |
3446 | } | |
3447 | ||
1da177e4 LT |
3448 | static int |
3449 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3450 | { | |
3b1e0a65 | 3451 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3452 | struct ifaddrmsg *ifm; |
3453 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3454 | struct in6_addr *pfx; |
7198f8ce TG |
3455 | struct inet6_ifaddr *ifa; |
3456 | struct net_device *dev; | |
55ebaef1 NT |
3457 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3458 | u8 ifa_flags; | |
461d8837 | 3459 | int err; |
1da177e4 | 3460 | |
461d8837 TG |
3461 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3462 | if (err < 0) | |
3463 | return err; | |
3464 | ||
3465 | ifm = nlmsg_data(nlh); | |
3466 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3467 | if (pfx == NULL) |
3468 | return -EINVAL; | |
3469 | ||
461d8837 | 3470 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3471 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3472 | |
3473 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3474 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3475 | preferred_lft = ci->ifa_prefered; |
3476 | } else { | |
3477 | preferred_lft = INFINITY_LIFE_TIME; | |
3478 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3479 | } |
3480 | ||
af284937 | 3481 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3482 | if (dev == NULL) |
3483 | return -ENODEV; | |
3484 | ||
55ebaef1 | 3485 | /* We ignore other flags so far. */ |
3b9f9a1c | 3486 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3487 | |
1cab3da6 | 3488 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3489 | if (ifa == NULL) { |
3490 | /* | |
3491 | * It would be best to check for !NLM_F_CREATE here but | |
3492 | * userspace alreay relies on not having to provide this. | |
3493 | */ | |
af284937 DL |
3494 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3495 | ifm->ifa_prefixlen, ifa_flags, | |
3496 | preferred_lft, valid_lft); | |
081bba5b NT |
3497 | } |
3498 | ||
7198f8ce TG |
3499 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3500 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3501 | err = -EEXIST; | |
3502 | else | |
55ebaef1 | 3503 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3504 | |
3505 | in6_ifa_put(ifa); | |
3506 | ||
3507 | return err; | |
1da177e4 LT |
3508 | } |
3509 | ||
101bb229 TG |
3510 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3511 | u8 scope, int ifindex) | |
3512 | { | |
3513 | struct ifaddrmsg *ifm; | |
3514 | ||
3515 | ifm = nlmsg_data(nlh); | |
3516 | ifm->ifa_family = AF_INET6; | |
3517 | ifm->ifa_prefixlen = prefixlen; | |
3518 | ifm->ifa_flags = flags; | |
3519 | ifm->ifa_scope = scope; | |
3520 | ifm->ifa_index = ifindex; | |
3521 | } | |
3522 | ||
85486af0 TG |
3523 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3524 | unsigned long tstamp, u32 preferred, u32 valid) | |
3525 | { | |
3526 | struct ifa_cacheinfo ci; | |
3527 | ||
18a31e1e TG |
3528 | ci.cstamp = cstamp_delta(cstamp); |
3529 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3530 | ci.ifa_prefered = preferred; |
3531 | ci.ifa_valid = valid; | |
3532 | ||
3533 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3534 | } | |
3535 | ||
101bb229 TG |
3536 | static inline int rt_scope(int ifa_scope) |
3537 | { | |
3538 | if (ifa_scope & IFA_HOST) | |
3539 | return RT_SCOPE_HOST; | |
3540 | else if (ifa_scope & IFA_LINK) | |
3541 | return RT_SCOPE_LINK; | |
3542 | else if (ifa_scope & IFA_SITE) | |
3543 | return RT_SCOPE_SITE; | |
3544 | else | |
3545 | return RT_SCOPE_UNIVERSE; | |
3546 | } | |
3547 | ||
0ab6803b TG |
3548 | static inline int inet6_ifaddr_msgsize(void) |
3549 | { | |
339bf98f TG |
3550 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3551 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3552 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3553 | } |
c5396a31 | 3554 | |
1da177e4 | 3555 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b | 3556 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3557 | { |
1da177e4 | 3558 | struct nlmsghdr *nlh; |
85486af0 | 3559 | u32 preferred, valid; |
1da177e4 | 3560 | |
0ab6803b TG |
3561 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3562 | if (nlh == NULL) | |
26932566 | 3563 | return -EMSGSIZE; |
0ab6803b | 3564 | |
101bb229 TG |
3565 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3566 | ifa->idev->dev->ifindex); | |
3567 | ||
1da177e4 | 3568 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3569 | preferred = ifa->prefered_lft; |
3570 | valid = ifa->valid_lft; | |
3571 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3572 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3573 | if (preferred > tval) |
3574 | preferred -= tval; | |
3575 | else | |
3576 | preferred = 0; | |
f56619fc BH |
3577 | if (valid != INFINITY_LIFE_TIME) { |
3578 | if (valid > tval) | |
3579 | valid -= tval; | |
3580 | else | |
3581 | valid = 0; | |
3582 | } | |
1da177e4 LT |
3583 | } |
3584 | } else { | |
85486af0 TG |
3585 | preferred = INFINITY_LIFE_TIME; |
3586 | valid = INFINITY_LIFE_TIME; | |
3587 | } | |
3588 | ||
0ab6803b | 3589 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3590 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3591 | nlmsg_cancel(skb, nlh); | |
3592 | return -EMSGSIZE; | |
3593 | } | |
1da177e4 | 3594 | |
0ab6803b | 3595 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3596 | } |
3597 | ||
3598 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
e431b8c0 | 3599 | u32 pid, u32 seq, int event, u16 flags) |
1da177e4 | 3600 | { |
1da177e4 | 3601 | struct nlmsghdr *nlh; |
101bb229 TG |
3602 | u8 scope = RT_SCOPE_UNIVERSE; |
3603 | int ifindex = ifmca->idev->dev->ifindex; | |
3604 | ||
3605 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3606 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3607 | |
0ab6803b TG |
3608 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3609 | if (nlh == NULL) | |
26932566 | 3610 | return -EMSGSIZE; |
85486af0 | 3611 | |
0ab6803b TG |
3612 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3613 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3614 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3615 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3616 | nlmsg_cancel(skb, nlh); | |
3617 | return -EMSGSIZE; | |
3618 | } | |
85486af0 | 3619 | |
0ab6803b | 3620 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3621 | } |
3622 | ||
3623 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
b6544c0b | 3624 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3625 | { |
1da177e4 | 3626 | struct nlmsghdr *nlh; |
101bb229 TG |
3627 | u8 scope = RT_SCOPE_UNIVERSE; |
3628 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3629 | ||
3630 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3631 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3632 | |
0ab6803b TG |
3633 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); |
3634 | if (nlh == NULL) | |
26932566 | 3635 | return -EMSGSIZE; |
85486af0 | 3636 | |
0ab6803b TG |
3637 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3638 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3639 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3640 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3641 | nlmsg_cancel(skb, nlh); | |
3642 | return -EMSGSIZE; | |
3643 | } | |
1da177e4 | 3644 | |
0ab6803b | 3645 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3646 | } |
3647 | ||
e21e8467 | 3648 | enum addr_type_t { |
1da177e4 LT |
3649 | UNICAST_ADDR, |
3650 | MULTICAST_ADDR, | |
3651 | ANYCAST_ADDR, | |
3652 | }; | |
3653 | ||
234b27c3 ED |
3654 | /* called with rcu_read_lock() */ |
3655 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3656 | struct netlink_callback *cb, enum addr_type_t type, | |
3657 | int s_ip_idx, int *p_ip_idx) | |
3658 | { | |
234b27c3 ED |
3659 | struct ifmcaddr6 *ifmca; |
3660 | struct ifacaddr6 *ifaca; | |
3661 | int err = 1; | |
3662 | int ip_idx = *p_ip_idx; | |
3663 | ||
3664 | read_lock_bh(&idev->lock); | |
3665 | switch (type) { | |
502a2ffd | 3666 | case UNICAST_ADDR: { |
3667 | struct inet6_ifaddr *ifa; | |
3668 | ||
234b27c3 | 3669 | /* unicast address incl. temp addr */ |
502a2ffd | 3670 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3671 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3672 | continue; |
3673 | err = inet6_fill_ifaddr(skb, ifa, | |
3674 | NETLINK_CB(cb->skb).pid, | |
3675 | cb->nlh->nlmsg_seq, | |
3676 | RTM_NEWADDR, | |
3677 | NLM_F_MULTI); | |
3678 | if (err <= 0) | |
3679 | break; | |
3680 | } | |
3681 | break; | |
502a2ffd | 3682 | } |
234b27c3 ED |
3683 | case MULTICAST_ADDR: |
3684 | /* multicast address */ | |
3685 | for (ifmca = idev->mc_list; ifmca; | |
3686 | ifmca = ifmca->next, ip_idx++) { | |
3687 | if (ip_idx < s_ip_idx) | |
3688 | continue; | |
3689 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
3690 | NETLINK_CB(cb->skb).pid, | |
3691 | cb->nlh->nlmsg_seq, | |
3692 | RTM_GETMULTICAST, | |
3693 | NLM_F_MULTI); | |
3694 | if (err <= 0) | |
3695 | break; | |
3696 | } | |
3697 | break; | |
3698 | case ANYCAST_ADDR: | |
3699 | /* anycast address */ | |
3700 | for (ifaca = idev->ac_list; ifaca; | |
3701 | ifaca = ifaca->aca_next, ip_idx++) { | |
3702 | if (ip_idx < s_ip_idx) | |
3703 | continue; | |
3704 | err = inet6_fill_ifacaddr(skb, ifaca, | |
3705 | NETLINK_CB(cb->skb).pid, | |
3706 | cb->nlh->nlmsg_seq, | |
3707 | RTM_GETANYCAST, | |
3708 | NLM_F_MULTI); | |
3709 | if (err <= 0) | |
3710 | break; | |
3711 | } | |
3712 | break; | |
3713 | default: | |
3714 | break; | |
3715 | } | |
3716 | read_unlock_bh(&idev->lock); | |
3717 | *p_ip_idx = ip_idx; | |
3718 | return err; | |
3719 | } | |
3720 | ||
1da177e4 LT |
3721 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3722 | enum addr_type_t type) | |
3723 | { | |
234b27c3 ED |
3724 | struct net *net = sock_net(skb->sk); |
3725 | int h, s_h; | |
1da177e4 LT |
3726 | int idx, ip_idx; |
3727 | int s_idx, s_ip_idx; | |
1da177e4 | 3728 | struct net_device *dev; |
234b27c3 ED |
3729 | struct inet6_dev *idev; |
3730 | struct hlist_head *head; | |
3731 | struct hlist_node *node; | |
1ab1457c | 3732 | |
234b27c3 ED |
3733 | s_h = cb->args[0]; |
3734 | s_idx = idx = cb->args[1]; | |
3735 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3736 | |
234b27c3 ED |
3737 | rcu_read_lock(); |
3738 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3739 | idx = 0; | |
3740 | head = &net->dev_index_head[h]; | |
3741 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3742 | if (idx < s_idx) | |
3743 | goto cont; | |
4b97efdf | 3744 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
3745 | s_ip_idx = 0; |
3746 | ip_idx = 0; | |
e21e8467 SH |
3747 | idev = __in6_dev_get(dev); |
3748 | if (!idev) | |
234b27c3 ED |
3749 | goto cont; |
3750 | ||
3751 | if (in6_dump_addrs(idev, skb, cb, type, | |
3752 | s_ip_idx, &ip_idx) <= 0) | |
3753 | goto done; | |
7562f876 | 3754 | cont: |
234b27c3 ED |
3755 | idx++; |
3756 | } | |
1da177e4 | 3757 | } |
234b27c3 ED |
3758 | done: |
3759 | rcu_read_unlock(); | |
3760 | cb->args[0] = h; | |
3761 | cb->args[1] = idx; | |
3762 | cb->args[2] = ip_idx; | |
3763 | ||
1da177e4 LT |
3764 | return skb->len; |
3765 | } | |
3766 | ||
3767 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3768 | { | |
3769 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3770 | |
1da177e4 LT |
3771 | return inet6_dump_addr(skb, cb, type); |
3772 | } | |
3773 | ||
3774 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3775 | { | |
3776 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3777 | |
1da177e4 LT |
3778 | return inet6_dump_addr(skb, cb, type); |
3779 | } | |
3780 | ||
3781 | ||
3782 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3783 | { | |
3784 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3785 | |
1da177e4 LT |
3786 | return inet6_dump_addr(skb, cb, type); |
3787 | } | |
3788 | ||
8e5e8f30 | 3789 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
1b29fc2c | 3790 | void *arg) |
6c223828 | 3791 | { |
3b1e0a65 | 3792 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3793 | struct ifaddrmsg *ifm; |
3794 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3795 | struct in6_addr *addr = NULL; |
3796 | struct net_device *dev = NULL; | |
3797 | struct inet6_ifaddr *ifa; | |
3798 | struct sk_buff *skb; | |
6c223828 NT |
3799 | int err; |
3800 | ||
1b29fc2c TG |
3801 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3802 | if (err < 0) | |
3803 | goto errout; | |
3804 | ||
3805 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3806 | if (addr == NULL) { | |
3807 | err = -EINVAL; | |
3808 | goto errout; | |
6c223828 | 3809 | } |
6c223828 | 3810 | |
1b29fc2c | 3811 | ifm = nlmsg_data(nlh); |
6c223828 | 3812 | if (ifm->ifa_index) |
6fda7350 | 3813 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3814 | |
e21e8467 SH |
3815 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
3816 | if (!ifa) { | |
1b29fc2c TG |
3817 | err = -EADDRNOTAVAIL; |
3818 | goto errout; | |
3819 | } | |
6c223828 | 3820 | |
e21e8467 SH |
3821 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
3822 | if (!skb) { | |
6c223828 | 3823 | err = -ENOBUFS; |
1b29fc2c | 3824 | goto errout_ifa; |
6c223828 NT |
3825 | } |
3826 | ||
6c223828 NT |
3827 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, |
3828 | nlh->nlmsg_seq, RTM_NEWADDR, 0); | |
26932566 PM |
3829 | if (err < 0) { |
3830 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3831 | WARN_ON(err == -EMSGSIZE); | |
3832 | kfree_skb(skb); | |
3833 | goto errout_ifa; | |
3834 | } | |
6fda7350 | 3835 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c | 3836 | errout_ifa: |
6c223828 | 3837 | in6_ifa_put(ifa); |
1b29fc2c | 3838 | errout: |
6c223828 | 3839 | return err; |
6c223828 NT |
3840 | } |
3841 | ||
1da177e4 LT |
3842 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3843 | { | |
3844 | struct sk_buff *skb; | |
c346dca1 | 3845 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3846 | int err = -ENOBUFS; |
1da177e4 | 3847 | |
0ab6803b | 3848 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3849 | if (skb == NULL) |
3850 | goto errout; | |
3851 | ||
3852 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3853 | if (err < 0) { |
3854 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3855 | WARN_ON(err == -EMSGSIZE); | |
3856 | kfree_skb(skb); | |
3857 | goto errout; | |
3858 | } | |
1ce85fe4 PNA |
3859 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3860 | return; | |
5d620266 TG |
3861 | errout: |
3862 | if (err < 0) | |
6fda7350 | 3863 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
3864 | } |
3865 | ||
b6f99a21 | 3866 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
3867 | __s32 *array, int bytes) |
3868 | { | |
04561c1f TG |
3869 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
3870 | ||
1da177e4 LT |
3871 | memset(array, 0, bytes); |
3872 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
3873 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
3874 | array[DEVCONF_MTU6] = cnf->mtu6; | |
3875 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
3876 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
3877 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
3878 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
3879 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
3880 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
3881 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
3882 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
3883 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 LT |
3884 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
3885 | #ifdef CONFIG_IPV6_PRIVACY | |
3886 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
3887 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
3888 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
3889 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
3890 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
3891 | #endif | |
3892 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 3893 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 3894 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
3895 | #ifdef CONFIG_IPV6_ROUTER_PREF |
3896 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
3897 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
3898 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 3899 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
3900 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
3901 | #endif | |
930d6ff2 | 3902 | #endif |
fbea49e1 | 3903 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 3904 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
3905 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
3906 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
3907 | #endif | |
7bc570c8 YH |
3908 | #ifdef CONFIG_IPV6_MROUTE |
3909 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
3910 | #endif | |
778d80be | 3911 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 3912 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 3913 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4 LT |
3914 | } |
3915 | ||
b382b191 TG |
3916 | static inline size_t inet6_ifla6_size(void) |
3917 | { | |
3918 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
3919 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
3920 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
3921 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
3922 | + nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */ | |
3923 | } | |
3924 | ||
339bf98f TG |
3925 | static inline size_t inet6_if_nlmsg_size(void) |
3926 | { | |
3927 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
3928 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
3929 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
3930 | + nla_total_size(4) /* IFLA_MTU */ | |
3931 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 3932 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 3933 | } |
c5396a31 | 3934 | |
be281e55 | 3935 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 3936 | int items, int bytes) |
7f7d9a6b HX |
3937 | { |
3938 | int i; | |
3939 | int pad = bytes - sizeof(u64) * items; | |
3940 | BUG_ON(pad < 0); | |
3941 | ||
3942 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3943 | put_unaligned(items, &stats[0]); | |
3944 | for (i = 1; i < items; i++) | |
be281e55 | 3945 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
3946 | |
3947 | memset(&stats[items], 0, pad); | |
3948 | } | |
3949 | ||
4ce3c183 ED |
3950 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
3951 | int items, int bytes, size_t syncpoff) | |
3952 | { | |
3953 | int i; | |
3954 | int pad = bytes - sizeof(u64) * items; | |
3955 | BUG_ON(pad < 0); | |
3956 | ||
3957 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
3958 | put_unaligned(items, &stats[0]); | |
3959 | for (i = 1; i < items; i++) | |
3960 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
3961 | ||
3962 | memset(&stats[items], 0, pad); | |
3963 | } | |
3964 | ||
7f7d9a6b HX |
3965 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
3966 | int bytes) | |
3967 | { | |
e21e8467 | 3968 | switch (attrtype) { |
7f7d9a6b | 3969 | case IFLA_INET6_STATS: |
4ce3c183 ED |
3970 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
3971 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
3972 | break; |
3973 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 3974 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
3975 | break; |
3976 | } | |
3977 | } | |
3978 | ||
b382b191 TG |
3979 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
3980 | { | |
3981 | struct nlattr *nla; | |
3982 | struct ifla_cacheinfo ci; | |
3983 | ||
c78679e8 DM |
3984 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
3985 | goto nla_put_failure; | |
b382b191 | 3986 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
3987 | ci.tstamp = cstamp_delta(idev->tstamp); |
3988 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
3989 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); | |
c78679e8 DM |
3990 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
3991 | goto nla_put_failure; | |
b382b191 TG |
3992 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
3993 | if (nla == NULL) | |
3994 | goto nla_put_failure; | |
3995 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
3996 | ||
3997 | /* XXX - MC not implemented */ | |
3998 | ||
3999 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4000 | if (nla == NULL) | |
4001 | goto nla_put_failure; | |
4002 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4003 | ||
4004 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4005 | if (nla == NULL) | |
4006 | goto nla_put_failure; | |
4007 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4008 | ||
4009 | return 0; | |
4010 | ||
4011 | nla_put_failure: | |
4012 | return -EMSGSIZE; | |
4013 | } | |
4014 | ||
4015 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4016 | { | |
4017 | if (!__in6_dev_get(dev)) | |
4018 | return 0; | |
4019 | ||
4020 | return inet6_ifla6_size(); | |
4021 | } | |
4022 | ||
4023 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4024 | { | |
4025 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4026 | ||
4027 | if (!idev) | |
4028 | return -ENODATA; | |
4029 | ||
4030 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4031 | return -EMSGSIZE; | |
4032 | ||
4033 | return 0; | |
4034 | } | |
4035 | ||
1ab1457c | 4036 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b | 4037 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4038 | { |
04561c1f | 4039 | struct net_device *dev = idev->dev; |
04561c1f TG |
4040 | struct ifinfomsg *hdr; |
4041 | struct nlmsghdr *nlh; | |
4042 | void *protoinfo; | |
04561c1f TG |
4043 | |
4044 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
4045 | if (nlh == NULL) | |
26932566 | 4046 | return -EMSGSIZE; |
04561c1f TG |
4047 | |
4048 | hdr = nlmsg_data(nlh); | |
4049 | hdr->ifi_family = AF_INET6; | |
4050 | hdr->__ifi_pad = 0; | |
4051 | hdr->ifi_type = dev->type; | |
4052 | hdr->ifi_index = dev->ifindex; | |
4053 | hdr->ifi_flags = dev_get_flags(dev); | |
4054 | hdr->ifi_change = 0; | |
4055 | ||
c78679e8 DM |
4056 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4057 | (dev->addr_len && | |
4058 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4059 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4060 | (dev->ifindex != dev->iflink && | |
4061 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4062 | goto nla_put_failure; | |
04561c1f TG |
4063 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4064 | if (protoinfo == NULL) | |
4065 | goto nla_put_failure; | |
1da177e4 | 4066 | |
b382b191 | 4067 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4068 | goto nla_put_failure; |
1da177e4 | 4069 | |
04561c1f TG |
4070 | nla_nest_end(skb, protoinfo); |
4071 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4072 | |
04561c1f | 4073 | nla_put_failure: |
26932566 PM |
4074 | nlmsg_cancel(skb, nlh); |
4075 | return -EMSGSIZE; | |
1da177e4 LT |
4076 | } |
4077 | ||
4078 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4079 | { | |
3b1e0a65 | 4080 | struct net *net = sock_net(skb->sk); |
84d2697d | 4081 | int h, s_h; |
434a8a58 | 4082 | int idx = 0, s_idx; |
1da177e4 LT |
4083 | struct net_device *dev; |
4084 | struct inet6_dev *idev; | |
84d2697d ED |
4085 | struct hlist_head *head; |
4086 | struct hlist_node *node; | |
1da177e4 | 4087 | |
84d2697d ED |
4088 | s_h = cb->args[0]; |
4089 | s_idx = cb->args[1]; | |
4090 | ||
4091 | rcu_read_lock(); | |
4092 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4093 | idx = 0; | |
4094 | head = &net->dev_index_head[h]; | |
4095 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
4096 | if (idx < s_idx) | |
4097 | goto cont; | |
4098 | idev = __in6_dev_get(dev); | |
4099 | if (!idev) | |
4100 | goto cont; | |
4101 | if (inet6_fill_ifinfo(skb, idev, | |
4102 | NETLINK_CB(cb->skb).pid, | |
4103 | cb->nlh->nlmsg_seq, | |
4104 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4105 | goto out; | |
7562f876 | 4106 | cont: |
84d2697d ED |
4107 | idx++; |
4108 | } | |
1da177e4 | 4109 | } |
84d2697d ED |
4110 | out: |
4111 | rcu_read_unlock(); | |
4112 | cb->args[1] = idx; | |
4113 | cb->args[0] = h; | |
1da177e4 LT |
4114 | |
4115 | return skb->len; | |
4116 | } | |
4117 | ||
4118 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4119 | { | |
4120 | struct sk_buff *skb; | |
c346dca1 | 4121 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4122 | int err = -ENOBUFS; |
1ab1457c | 4123 | |
339bf98f | 4124 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4125 | if (skb == NULL) |
4126 | goto errout; | |
4127 | ||
4128 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4129 | if (err < 0) { |
4130 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4131 | WARN_ON(err == -EMSGSIZE); | |
4132 | kfree_skb(skb); | |
4133 | goto errout; | |
4134 | } | |
5f75a104 | 4135 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4136 | return; |
8d7a76c9 TG |
4137 | errout: |
4138 | if (err < 0) | |
5f75a104 | 4139 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4140 | } |
4141 | ||
339bf98f TG |
4142 | static inline size_t inet6_prefix_nlmsg_size(void) |
4143 | { | |
4144 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4145 | + nla_total_size(sizeof(struct in6_addr)) | |
4146 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4147 | } | |
c5396a31 | 4148 | |
1da177e4 | 4149 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4 TG |
4150 | struct prefix_info *pinfo, u32 pid, u32 seq, |
4151 | int event, unsigned int flags) | |
1da177e4 | 4152 | { |
6051e2f4 TG |
4153 | struct prefixmsg *pmsg; |
4154 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4155 | struct prefix_cacheinfo ci; |
4156 | ||
6051e2f4 TG |
4157 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); |
4158 | if (nlh == NULL) | |
26932566 | 4159 | return -EMSGSIZE; |
6051e2f4 TG |
4160 | |
4161 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4162 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4163 | pmsg->prefix_pad1 = 0; |
4164 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4165 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4166 | pmsg->prefix_len = pinfo->prefix_len; | |
4167 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4168 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4169 | pmsg->prefix_flags = 0; |
4170 | if (pinfo->onlink) | |
4171 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4172 | if (pinfo->autoconf) | |
4173 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4174 | ||
c78679e8 DM |
4175 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4176 | goto nla_put_failure; | |
1da177e4 LT |
4177 | ci.preferred_time = ntohl(pinfo->prefered); |
4178 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4179 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4180 | goto nla_put_failure; | |
6051e2f4 | 4181 | return nlmsg_end(skb, nlh); |
1da177e4 | 4182 | |
6051e2f4 | 4183 | nla_put_failure: |
26932566 PM |
4184 | nlmsg_cancel(skb, nlh); |
4185 | return -EMSGSIZE; | |
1da177e4 LT |
4186 | } |
4187 | ||
1ab1457c | 4188 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4189 | struct prefix_info *pinfo) |
4190 | { | |
4191 | struct sk_buff *skb; | |
c346dca1 | 4192 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4193 | int err = -ENOBUFS; |
1da177e4 | 4194 | |
339bf98f | 4195 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4196 | if (skb == NULL) |
4197 | goto errout; | |
4198 | ||
4199 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4200 | if (err < 0) { |
4201 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4202 | WARN_ON(err == -EMSGSIZE); | |
4203 | kfree_skb(skb); | |
4204 | goto errout; | |
4205 | } | |
1ce85fe4 PNA |
4206 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4207 | return; | |
8c384bfa TG |
4208 | errout: |
4209 | if (err < 0) | |
6fda7350 | 4210 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4211 | } |
4212 | ||
1da177e4 LT |
4213 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4214 | { | |
4215 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4216 | ||
4217 | switch (event) { | |
4218 | case RTM_NEWADDR: | |
95c385b4 NH |
4219 | /* |
4220 | * If the address was optimistic | |
4221 | * we inserted the route at the start of | |
4222 | * our DAD process, so we don't need | |
4223 | * to do it again | |
4224 | */ | |
4225 | if (!(ifp->rt->rt6i_node)) | |
4226 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4227 | if (ifp->idev->cnf.forwarding) |
4228 | addrconf_join_anycast(ifp); | |
4229 | break; | |
4230 | case RTM_DELADDR: | |
4231 | if (ifp->idev->cnf.forwarding) | |
4232 | addrconf_leave_anycast(ifp); | |
4233 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
d8d1f30b | 4234 | dst_hold(&ifp->rt->dst); |
93fa159a | 4235 | |
73a8bd74 | 4236 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4237 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4238 | break; |
4239 | } | |
4240 | } | |
4241 | ||
4242 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4243 | { | |
8814c4b5 | 4244 | rcu_read_lock_bh(); |
1da177e4 LT |
4245 | if (likely(ifp->idev->dead == 0)) |
4246 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4247 | rcu_read_unlock_bh(); |
1da177e4 LT |
4248 | } |
4249 | ||
4250 | #ifdef CONFIG_SYSCTL | |
4251 | ||
4252 | static | |
8d65af78 | 4253 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4254 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4255 | { | |
4256 | int *valp = ctl->data; | |
4257 | int val = *valp; | |
88af182e | 4258 | loff_t pos = *ppos; |
013d97e9 | 4259 | ctl_table lctl; |
1da177e4 LT |
4260 | int ret; |
4261 | ||
013d97e9 FR |
4262 | /* |
4263 | * ctl->data points to idev->cnf.forwarding, we should | |
4264 | * not modify it until we get the rtnl lock. | |
4265 | */ | |
4266 | lctl = *ctl; | |
4267 | lctl.data = &val; | |
4268 | ||
4269 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4270 | |
c8fecf22 | 4271 | if (write) |
b325fddb | 4272 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4273 | if (ret) |
4274 | *ppos = pos; | |
1ab1457c | 4275 | return ret; |
1da177e4 LT |
4276 | } |
4277 | ||
56d417b1 BH |
4278 | static void dev_disable_change(struct inet6_dev *idev) |
4279 | { | |
4280 | if (!idev || !idev->dev) | |
4281 | return; | |
4282 | ||
4283 | if (idev->cnf.disable_ipv6) | |
4284 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4285 | else | |
4286 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4287 | } | |
4288 | ||
4289 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4290 | { | |
4291 | struct net_device *dev; | |
4292 | struct inet6_dev *idev; | |
4293 | ||
c6d14c84 ED |
4294 | rcu_read_lock(); |
4295 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4296 | idev = __in6_dev_get(dev); |
4297 | if (idev) { | |
4298 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4299 | idev->cnf.disable_ipv6 = newf; | |
4300 | if (changed) | |
4301 | dev_disable_change(idev); | |
4302 | } | |
56d417b1 | 4303 | } |
c6d14c84 | 4304 | rcu_read_unlock(); |
56d417b1 BH |
4305 | } |
4306 | ||
013d97e9 | 4307 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4308 | { |
4309 | struct net *net; | |
013d97e9 FR |
4310 | int old; |
4311 | ||
4312 | if (!rtnl_trylock()) | |
4313 | return restart_syscall(); | |
56d417b1 BH |
4314 | |
4315 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4316 | old = *p; |
4317 | *p = newf; | |
56d417b1 | 4318 | |
013d97e9 FR |
4319 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4320 | rtnl_unlock(); | |
56d417b1 | 4321 | return 0; |
88af182e | 4322 | } |
56d417b1 BH |
4323 | |
4324 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4325 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4326 | addrconf_disable_change(net, newf); | |
013d97e9 | 4327 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4328 | dev_disable_change((struct inet6_dev *)table->extra1); |
4329 | ||
4330 | rtnl_unlock(); | |
4331 | return 0; | |
4332 | } | |
4333 | ||
4334 | static | |
8d65af78 | 4335 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4336 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4337 | { | |
4338 | int *valp = ctl->data; | |
4339 | int val = *valp; | |
88af182e | 4340 | loff_t pos = *ppos; |
013d97e9 | 4341 | ctl_table lctl; |
56d417b1 BH |
4342 | int ret; |
4343 | ||
013d97e9 FR |
4344 | /* |
4345 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4346 | * not modify it until we get the rtnl lock. | |
4347 | */ | |
4348 | lctl = *ctl; | |
4349 | lctl.data = &val; | |
4350 | ||
4351 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4352 | |
4353 | if (write) | |
4354 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4355 | if (ret) |
4356 | *ppos = pos; | |
56d417b1 BH |
4357 | return ret; |
4358 | } | |
4359 | ||
1da177e4 LT |
4360 | static struct addrconf_sysctl_table |
4361 | { | |
4362 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4363 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4364 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4365 | .sysctl_header = NULL, |
4366 | .addrconf_vars = { | |
1ab1457c | 4367 | { |
e21e8467 SH |
4368 | .procname = "forwarding", |
4369 | .data = &ipv6_devconf.forwarding, | |
4370 | .maxlen = sizeof(int), | |
4371 | .mode = 0644, | |
4372 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4373 | }, |
4374 | { | |
e21e8467 SH |
4375 | .procname = "hop_limit", |
4376 | .data = &ipv6_devconf.hop_limit, | |
4377 | .maxlen = sizeof(int), | |
4378 | .mode = 0644, | |
4379 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4380 | }, |
4381 | { | |
e21e8467 SH |
4382 | .procname = "mtu", |
4383 | .data = &ipv6_devconf.mtu6, | |
4384 | .maxlen = sizeof(int), | |
4385 | .mode = 0644, | |
4386 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4387 | }, |
4388 | { | |
e21e8467 SH |
4389 | .procname = "accept_ra", |
4390 | .data = &ipv6_devconf.accept_ra, | |
4391 | .maxlen = sizeof(int), | |
4392 | .mode = 0644, | |
4393 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4394 | }, |
4395 | { | |
e21e8467 SH |
4396 | .procname = "accept_redirects", |
4397 | .data = &ipv6_devconf.accept_redirects, | |
4398 | .maxlen = sizeof(int), | |
4399 | .mode = 0644, | |
4400 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4401 | }, |
4402 | { | |
e21e8467 SH |
4403 | .procname = "autoconf", |
4404 | .data = &ipv6_devconf.autoconf, | |
4405 | .maxlen = sizeof(int), | |
4406 | .mode = 0644, | |
4407 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4408 | }, |
4409 | { | |
e21e8467 SH |
4410 | .procname = "dad_transmits", |
4411 | .data = &ipv6_devconf.dad_transmits, | |
4412 | .maxlen = sizeof(int), | |
4413 | .mode = 0644, | |
4414 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4415 | }, |
4416 | { | |
e21e8467 SH |
4417 | .procname = "router_solicitations", |
4418 | .data = &ipv6_devconf.rtr_solicits, | |
4419 | .maxlen = sizeof(int), | |
4420 | .mode = 0644, | |
4421 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4422 | }, |
4423 | { | |
e21e8467 SH |
4424 | .procname = "router_solicitation_interval", |
4425 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4426 | .maxlen = sizeof(int), | |
4427 | .mode = 0644, | |
4428 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4429 | }, |
4430 | { | |
e21e8467 SH |
4431 | .procname = "router_solicitation_delay", |
4432 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4433 | .maxlen = sizeof(int), | |
4434 | .mode = 0644, | |
4435 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4436 | }, |
4437 | { | |
e21e8467 SH |
4438 | .procname = "force_mld_version", |
4439 | .data = &ipv6_devconf.force_mld_version, | |
4440 | .maxlen = sizeof(int), | |
4441 | .mode = 0644, | |
4442 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4443 | }, |
4444 | #ifdef CONFIG_IPV6_PRIVACY | |
4445 | { | |
e21e8467 SH |
4446 | .procname = "use_tempaddr", |
4447 | .data = &ipv6_devconf.use_tempaddr, | |
4448 | .maxlen = sizeof(int), | |
4449 | .mode = 0644, | |
4450 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4451 | }, |
4452 | { | |
e21e8467 SH |
4453 | .procname = "temp_valid_lft", |
4454 | .data = &ipv6_devconf.temp_valid_lft, | |
4455 | .maxlen = sizeof(int), | |
4456 | .mode = 0644, | |
4457 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4458 | }, |
4459 | { | |
e21e8467 SH |
4460 | .procname = "temp_prefered_lft", |
4461 | .data = &ipv6_devconf.temp_prefered_lft, | |
4462 | .maxlen = sizeof(int), | |
4463 | .mode = 0644, | |
4464 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4465 | }, |
4466 | { | |
e21e8467 SH |
4467 | .procname = "regen_max_retry", |
4468 | .data = &ipv6_devconf.regen_max_retry, | |
4469 | .maxlen = sizeof(int), | |
4470 | .mode = 0644, | |
4471 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4472 | }, |
4473 | { | |
e21e8467 SH |
4474 | .procname = "max_desync_factor", |
4475 | .data = &ipv6_devconf.max_desync_factor, | |
4476 | .maxlen = sizeof(int), | |
4477 | .mode = 0644, | |
4478 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4479 | }, |
4480 | #endif | |
4481 | { | |
e21e8467 SH |
4482 | .procname = "max_addresses", |
4483 | .data = &ipv6_devconf.max_addresses, | |
4484 | .maxlen = sizeof(int), | |
4485 | .mode = 0644, | |
4486 | .proc_handler = proc_dointvec, | |
1da177e4 | 4487 | }, |
65f5c7c1 | 4488 | { |
e21e8467 SH |
4489 | .procname = "accept_ra_defrtr", |
4490 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4491 | .maxlen = sizeof(int), | |
4492 | .mode = 0644, | |
4493 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4494 | }, |
c4fd30eb | 4495 | { |
e21e8467 SH |
4496 | .procname = "accept_ra_pinfo", |
4497 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4498 | .maxlen = sizeof(int), | |
4499 | .mode = 0644, | |
4500 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4501 | }, |
930d6ff2 YH |
4502 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4503 | { | |
e21e8467 SH |
4504 | .procname = "accept_ra_rtr_pref", |
4505 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4506 | .maxlen = sizeof(int), | |
4507 | .mode = 0644, | |
4508 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4509 | }, |
52e16356 | 4510 | { |
e21e8467 SH |
4511 | .procname = "router_probe_interval", |
4512 | .data = &ipv6_devconf.rtr_probe_interval, | |
4513 | .maxlen = sizeof(int), | |
4514 | .mode = 0644, | |
4515 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4516 | }, |
fa03ef38 | 4517 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4518 | { |
e21e8467 SH |
4519 | .procname = "accept_ra_rt_info_max_plen", |
4520 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4521 | .maxlen = sizeof(int), | |
4522 | .mode = 0644, | |
4523 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4524 | }, |
4525 | #endif | |
930d6ff2 | 4526 | #endif |
fbea49e1 | 4527 | { |
e21e8467 SH |
4528 | .procname = "proxy_ndp", |
4529 | .data = &ipv6_devconf.proxy_ndp, | |
4530 | .maxlen = sizeof(int), | |
4531 | .mode = 0644, | |
4532 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4533 | }, |
0bcbc926 | 4534 | { |
e21e8467 SH |
4535 | .procname = "accept_source_route", |
4536 | .data = &ipv6_devconf.accept_source_route, | |
4537 | .maxlen = sizeof(int), | |
4538 | .mode = 0644, | |
4539 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4540 | }, |
95c385b4 NH |
4541 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4542 | { | |
e21e8467 SH |
4543 | .procname = "optimistic_dad", |
4544 | .data = &ipv6_devconf.optimistic_dad, | |
4545 | .maxlen = sizeof(int), | |
4546 | .mode = 0644, | |
4547 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4548 | |
4549 | }, | |
7bc570c8 YH |
4550 | #endif |
4551 | #ifdef CONFIG_IPV6_MROUTE | |
4552 | { | |
e21e8467 SH |
4553 | .procname = "mc_forwarding", |
4554 | .data = &ipv6_devconf.mc_forwarding, | |
4555 | .maxlen = sizeof(int), | |
4556 | .mode = 0444, | |
4557 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4558 | }, |
95c385b4 | 4559 | #endif |
778d80be | 4560 | { |
e21e8467 SH |
4561 | .procname = "disable_ipv6", |
4562 | .data = &ipv6_devconf.disable_ipv6, | |
4563 | .maxlen = sizeof(int), | |
4564 | .mode = 0644, | |
4565 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4566 | }, |
1b34be74 | 4567 | { |
e21e8467 SH |
4568 | .procname = "accept_dad", |
4569 | .data = &ipv6_devconf.accept_dad, | |
4570 | .maxlen = sizeof(int), | |
4571 | .mode = 0644, | |
4572 | .proc_handler = proc_dointvec, | |
1b34be74 | 4573 | }, |
f7734fdf | 4574 | { |
f7734fdf OP |
4575 | .procname = "force_tllao", |
4576 | .data = &ipv6_devconf.force_tllao, | |
4577 | .maxlen = sizeof(int), | |
4578 | .mode = 0644, | |
4579 | .proc_handler = proc_dointvec | |
4580 | }, | |
1da177e4 | 4581 | { |
f8572d8f | 4582 | /* sentinel */ |
1da177e4 LT |
4583 | } |
4584 | }, | |
1da177e4 LT |
4585 | }; |
4586 | ||
bff16c2f | 4587 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4588 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4589 | { |
4590 | int i; | |
1da177e4 | 4591 | struct addrconf_sysctl_table *t; |
6105e293 | 4592 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 4593 | |
af879cc7 | 4594 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4595 | if (t == NULL) |
f68635e6 PE |
4596 | goto out; |
4597 | ||
bcdd553f | 4598 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4599 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4600 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4601 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4602 | } |
1da177e4 | 4603 | |
6105e293 | 4604 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 4605 | |
6105e293 | 4606 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 4607 | if (t->sysctl_header == NULL) |
6105e293 | 4608 | goto free; |
f68635e6 PE |
4609 | |
4610 | p->sysctl = t; | |
95897312 | 4611 | return 0; |
1da177e4 | 4612 | |
f68635e6 | 4613 | free: |
1da177e4 | 4614 | kfree(t); |
f68635e6 | 4615 | out: |
95897312 | 4616 | return -ENOBUFS; |
1da177e4 LT |
4617 | } |
4618 | ||
408c4768 PE |
4619 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4620 | { | |
4621 | struct addrconf_sysctl_table *t; | |
4622 | ||
4623 | if (p->sysctl == NULL) | |
4624 | return; | |
4625 | ||
4626 | t = p->sysctl; | |
4627 | p->sysctl = NULL; | |
ff538818 | 4628 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
4629 | kfree(t); |
4630 | } | |
4631 | ||
f52295a9 PE |
4632 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4633 | { | |
54716e3b | 4634 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4635 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4636 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4637 | idev, &idev->cnf); |
f52295a9 PE |
4638 | } |
4639 | ||
408c4768 | 4640 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4641 | { |
408c4768 PE |
4642 | __addrconf_sysctl_unregister(&idev->cnf); |
4643 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4644 | } |
4645 | ||
4646 | ||
4647 | #endif | |
4648 | ||
2c8c1e72 | 4649 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4650 | { |
4651 | int err; | |
4652 | struct ipv6_devconf *all, *dflt; | |
4653 | ||
4654 | err = -ENOMEM; | |
4655 | all = &ipv6_devconf; | |
4656 | dflt = &ipv6_devconf_dflt; | |
4657 | ||
09ad9bc7 | 4658 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4659 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4660 | if (all == NULL) | |
4661 | goto err_alloc_all; | |
4662 | ||
4663 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4664 | if (dflt == NULL) | |
4665 | goto err_alloc_dflt; | |
56d417b1 BH |
4666 | } else { |
4667 | /* these will be inherited by all namespaces */ | |
4668 | dflt->autoconf = ipv6_defaults.autoconf; | |
4669 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4670 | } |
4671 | ||
4672 | net->ipv6.devconf_all = all; | |
4673 | net->ipv6.devconf_dflt = dflt; | |
4674 | ||
4675 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4676 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4677 | if (err < 0) |
4678 | goto err_reg_all; | |
4679 | ||
f8572d8f | 4680 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4681 | if (err < 0) |
4682 | goto err_reg_dflt; | |
4683 | #endif | |
4684 | return 0; | |
4685 | ||
4686 | #ifdef CONFIG_SYSCTL | |
4687 | err_reg_dflt: | |
4688 | __addrconf_sysctl_unregister(all); | |
4689 | err_reg_all: | |
4690 | kfree(dflt); | |
4691 | #endif | |
4692 | err_alloc_dflt: | |
4693 | kfree(all); | |
4694 | err_alloc_all: | |
4695 | return err; | |
4696 | } | |
4697 | ||
2c8c1e72 | 4698 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4699 | { |
4700 | #ifdef CONFIG_SYSCTL | |
4701 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4702 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4703 | #endif | |
09ad9bc7 | 4704 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4705 | kfree(net->ipv6.devconf_dflt); |
4706 | kfree(net->ipv6.devconf_all); | |
4707 | } | |
4708 | } | |
4709 | ||
4710 | static struct pernet_operations addrconf_ops = { | |
4711 | .init = addrconf_init_net, | |
4712 | .exit = addrconf_exit_net, | |
4713 | }; | |
4714 | ||
1da177e4 LT |
4715 | /* |
4716 | * Device notifier | |
4717 | */ | |
4718 | ||
4719 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4720 | { | |
1ab1457c | 4721 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 | 4722 | } |
7159039a YH |
4723 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4724 | ||
1da177e4 LT |
4725 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4726 | { | |
e21e8467 | 4727 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4 | 4728 | } |
7159039a YH |
4729 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4730 | ||
b382b191 TG |
4731 | static struct rtnl_af_ops inet6_ops = { |
4732 | .family = AF_INET6, | |
4733 | .fill_link_af = inet6_fill_link_af, | |
4734 | .get_link_af_size = inet6_get_link_af_size, | |
b382b191 TG |
4735 | }; |
4736 | ||
1da177e4 LT |
4737 | /* |
4738 | * Init / cleanup code | |
4739 | */ | |
4740 | ||
4741 | int __init addrconf_init(void) | |
4742 | { | |
c2e21293 | 4743 | int i, err; |
2a8cc6c8 | 4744 | |
e21e8467 SH |
4745 | err = ipv6_addr_label_init(); |
4746 | if (err < 0) { | |
f3213831 JP |
4747 | pr_crit("%s: cannot initialize default policy table: %d\n", |
4748 | __func__, err); | |
2cc6d2bf | 4749 | goto out; |
2a8cc6c8 | 4750 | } |
1da177e4 | 4751 | |
2cc6d2bf NH |
4752 | err = register_pernet_subsys(&addrconf_ops); |
4753 | if (err < 0) | |
4754 | goto out_addrlabel; | |
e0da5a48 | 4755 | |
1da177e4 LT |
4756 | /* The addrconf netdev notifier requires that loopback_dev |
4757 | * has it's ipv6 private information allocated and setup | |
4758 | * before it can bring up and give link-local addresses | |
4759 | * to other devices which are up. | |
4760 | * | |
4761 | * Unfortunately, loopback_dev is not necessarily the first | |
4762 | * entry in the global dev_base list of net devices. In fact, | |
4763 | * it is likely to be the very last entry on that list. | |
4764 | * So this causes the notifier registry below to try and | |
4765 | * give link-local addresses to all devices besides loopback_dev | |
4766 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4767 | * devices to fail to get a link-local address. | |
4768 | * | |
4769 | * So, as a temporary fix, allocate the ipv6 structure for | |
4770 | * loopback_dev first by hand. | |
4771 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4772 | * device and it being up should be removed. | |
4773 | */ | |
4774 | rtnl_lock(); | |
2774c7ab | 4775 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4776 | err = -ENOMEM; |
4777 | rtnl_unlock(); | |
4778 | if (err) | |
e0da5a48 | 4779 | goto errlo; |
1da177e4 | 4780 | |
c2e21293 | 4781 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4782 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
4783 | ||
1da177e4 LT |
4784 | register_netdevice_notifier(&ipv6_dev_notf); |
4785 | ||
1da177e4 | 4786 | addrconf_verify(0); |
c127ea2c | 4787 | |
b382b191 TG |
4788 | err = rtnl_af_register(&inet6_ops); |
4789 | if (err < 0) | |
4790 | goto errout_af; | |
4791 | ||
c7ac8679 GR |
4792 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
4793 | NULL); | |
c127ea2c TG |
4794 | if (err < 0) |
4795 | goto errout; | |
4796 | ||
4797 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
4798 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
4799 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
4800 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
4801 | inet6_dump_ifaddr, NULL); | |
4802 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
4803 | inet6_dump_ifmcaddr, NULL); | |
4804 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
4805 | inet6_dump_ifacaddr, NULL); | |
c127ea2c | 4806 | |
2a8cc6c8 YH |
4807 | ipv6_addr_label_rtnl_register(); |
4808 | ||
1da177e4 | 4809 | return 0; |
c127ea2c | 4810 | errout: |
b382b191 TG |
4811 | rtnl_af_unregister(&inet6_ops); |
4812 | errout_af: | |
c127ea2c | 4813 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 PE |
4814 | errlo: |
4815 | unregister_pernet_subsys(&addrconf_ops); | |
2cc6d2bf NH |
4816 | out_addrlabel: |
4817 | ipv6_addr_label_cleanup(); | |
4818 | out: | |
c127ea2c | 4819 | return err; |
1da177e4 LT |
4820 | } |
4821 | ||
09f7709f | 4822 | void addrconf_cleanup(void) |
1da177e4 | 4823 | { |
176c39af | 4824 | struct net_device *dev; |
1da177e4 LT |
4825 | int i; |
4826 | ||
4827 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4828 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 4829 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
4830 | |
4831 | rtnl_lock(); | |
4832 | ||
b382b191 TG |
4833 | __rtnl_af_unregister(&inet6_ops); |
4834 | ||
176c39af DL |
4835 | /* clean dev list */ |
4836 | for_each_netdev(&init_net, dev) { | |
4837 | if (__in6_dev_get(dev) == NULL) | |
4838 | continue; | |
4839 | addrconf_ifdown(dev, 1); | |
4840 | } | |
4841 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4842 | ||
1da177e4 LT |
4843 | /* |
4844 | * Check hash table. | |
4845 | */ | |
5c578aed | 4846 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 4847 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4848 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 4849 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
4850 | |
4851 | del_timer(&addr_chk_timer); | |
1da177e4 | 4852 | rtnl_unlock(); |
1da177e4 | 4853 | } |