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> |
cb6bf355 | 73 | #include <net/firewire.h> |
1da177e4 LT |
74 | #include <net/ipv6.h> |
75 | #include <net/protocol.h> | |
76 | #include <net/ndisc.h> | |
77 | #include <net/ip6_route.h> | |
78 | #include <net/addrconf.h> | |
79 | #include <net/tcp.h> | |
80 | #include <net/ip.h> | |
5d620266 | 81 | #include <net/netlink.h> |
f24e3d65 | 82 | #include <net/pkt_sched.h> |
1da177e4 LT |
83 | #include <linux/if_tunnel.h> |
84 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 85 | #include <linux/netconf.h> |
1da177e4 LT |
86 | |
87 | #ifdef CONFIG_IPV6_PRIVACY | |
88 | #include <linux/random.h> | |
1da177e4 LT |
89 | #endif |
90 | ||
e21e8467 | 91 | #include <linux/uaccess.h> |
7f7d9a6b | 92 | #include <asm/unaligned.h> |
1da177e4 LT |
93 | |
94 | #include <linux/proc_fs.h> | |
95 | #include <linux/seq_file.h> | |
bc3b2d7f | 96 | #include <linux/export.h> |
1da177e4 LT |
97 | |
98 | /* Set to 3 to get tracing... */ | |
99 | #define ACONF_DEBUG 2 | |
100 | ||
101 | #if ACONF_DEBUG >= 3 | |
102 | #define ADBG(x) printk x | |
103 | #else | |
104 | #define ADBG(x) | |
105 | #endif | |
106 | ||
107 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e TG |
108 | |
109 | static inline u32 cstamp_delta(unsigned long cstamp) | |
110 | { | |
111 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
112 | } | |
1da177e4 LT |
113 | |
114 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 115 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
116 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
117 | #else | |
118 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
119 | { | |
120 | } | |
121 | ||
122 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
123 | { | |
124 | } | |
1da177e4 LT |
125 | #endif |
126 | ||
127 | #ifdef CONFIG_IPV6_PRIVACY | |
eb7e0575 SD |
128 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
129 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 130 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 LT |
131 | #endif |
132 | ||
1b34be74 | 133 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
134 | static int ipv6_count_addresses(struct inet6_dev *idev); |
135 | ||
136 | /* | |
137 | * Configured unicast address hash table | |
138 | */ | |
c2e21293 | 139 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 140 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 141 | |
1da177e4 LT |
142 | static void addrconf_verify(unsigned long); |
143 | ||
8d06afab | 144 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
145 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
146 | ||
147 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
148 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
149 | ||
93d9b7d7 JP |
150 | static void addrconf_type_change(struct net_device *dev, |
151 | unsigned long event); | |
1da177e4 LT |
152 | static int addrconf_ifdown(struct net_device *dev, int how); |
153 | ||
21caa662 RK |
154 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
155 | int plen, | |
156 | const struct net_device *dev, | |
157 | u32 flags, u32 noflags); | |
158 | ||
cf22f9a2 | 159 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
1da177e4 LT |
160 | static void addrconf_dad_timer(unsigned long data); |
161 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 162 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
163 | static void addrconf_rs_timer(unsigned long data); |
164 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
165 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
166 | ||
1ab1457c | 167 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 168 | struct prefix_info *pinfo); |
3e81c6da DM |
169 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
170 | struct net_device *dev); | |
1da177e4 | 171 | |
888c848e | 172 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
173 | .forwarding = 0, |
174 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
175 | .mtu6 = IPV6_MIN_MTU, | |
176 | .accept_ra = 1, | |
177 | .accept_redirects = 1, | |
178 | .autoconf = 1, | |
179 | .force_mld_version = 0, | |
180 | .dad_transmits = 1, | |
181 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
182 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
183 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
184 | #ifdef CONFIG_IPV6_PRIVACY | |
185 | .use_tempaddr = 0, | |
186 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
187 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
188 | .regen_max_retry = REGEN_MAX_RETRY, | |
189 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
190 | #endif | |
191 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 192 | .accept_ra_defrtr = 1, |
c4fd30eb | 193 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
194 | #ifdef CONFIG_IPV6_ROUTER_PREF |
195 | .accept_ra_rtr_pref = 1, | |
52e16356 | 196 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
197 | #ifdef CONFIG_IPV6_ROUTE_INFO |
198 | .accept_ra_rt_info_max_plen = 0, | |
199 | #endif | |
930d6ff2 | 200 | #endif |
fbea49e1 | 201 | .proxy_ndp = 0, |
0bcbc926 | 202 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 203 | .disable_ipv6 = 0, |
1b34be74 | 204 | .accept_dad = 1, |
1da177e4 LT |
205 | }; |
206 | ||
ab32ea5d | 207 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
208 | .forwarding = 0, |
209 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
210 | .mtu6 = IPV6_MIN_MTU, | |
211 | .accept_ra = 1, | |
212 | .accept_redirects = 1, | |
213 | .autoconf = 1, | |
214 | .dad_transmits = 1, | |
215 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
216 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
217 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
218 | #ifdef CONFIG_IPV6_PRIVACY | |
219 | .use_tempaddr = 0, | |
220 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
221 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
222 | .regen_max_retry = REGEN_MAX_RETRY, | |
223 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
224 | #endif | |
225 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 226 | .accept_ra_defrtr = 1, |
c4fd30eb | 227 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
228 | #ifdef CONFIG_IPV6_ROUTER_PREF |
229 | .accept_ra_rtr_pref = 1, | |
52e16356 | 230 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
231 | #ifdef CONFIG_IPV6_ROUTE_INFO |
232 | .accept_ra_rt_info_max_plen = 0, | |
233 | #endif | |
930d6ff2 | 234 | #endif |
fbea49e1 | 235 | .proxy_ndp = 0, |
0bcbc926 | 236 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 237 | .disable_ipv6 = 0, |
1b34be74 | 238 | .accept_dad = 1, |
1da177e4 LT |
239 | }; |
240 | ||
241 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 242 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 243 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
244 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
245 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
2c5e8933 HFS |
246 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; |
247 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; | |
248 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; | |
1da177e4 | 249 | |
f24e3d65 | 250 | /* Check if a valid qdisc is available */ |
05297949 | 251 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 252 | { |
05297949 | 253 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
254 | } |
255 | ||
1da177e4 LT |
256 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
257 | { | |
258 | if (del_timer(&ifp->timer)) | |
259 | __in6_ifa_put(ifp); | |
260 | } | |
261 | ||
e21e8467 | 262 | enum addrconf_timer_t { |
1da177e4 LT |
263 | AC_NONE, |
264 | AC_DAD, | |
265 | AC_RS, | |
266 | }; | |
267 | ||
268 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
269 | enum addrconf_timer_t what, | |
270 | unsigned long when) | |
271 | { | |
272 | if (!del_timer(&ifp->timer)) | |
273 | in6_ifa_hold(ifp); | |
274 | ||
275 | switch (what) { | |
276 | case AC_DAD: | |
277 | ifp->timer.function = addrconf_dad_timer; | |
278 | break; | |
279 | case AC_RS: | |
280 | ifp->timer.function = addrconf_rs_timer; | |
281 | break; | |
e21e8467 SH |
282 | default: |
283 | break; | |
1da177e4 LT |
284 | } |
285 | ifp->timer.expires = jiffies + when; | |
286 | add_timer(&ifp->timer); | |
287 | } | |
288 | ||
7f7d9a6b HX |
289 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
290 | { | |
7d720c3e | 291 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
1823e4c8 ED |
292 | sizeof(struct ipstats_mib), |
293 | __alignof__(struct ipstats_mib)) < 0) | |
7f7d9a6b | 294 | goto err_ip; |
be281e55 ED |
295 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
296 | GFP_KERNEL); | |
297 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 298 | goto err_icmp; |
be281e55 ED |
299 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
300 | GFP_KERNEL); | |
301 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 302 | goto err_icmpmsg; |
7f7d9a6b HX |
303 | |
304 | return 0; | |
305 | ||
14878f75 | 306 | err_icmpmsg: |
be281e55 | 307 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 308 | err_icmp: |
7d720c3e | 309 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 310 | err_ip: |
aaf70ec7 | 311 | return -ENOMEM; |
7f7d9a6b HX |
312 | } |
313 | ||
16910b98 | 314 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 315 | { |
be281e55 ED |
316 | kfree(idev->stats.icmpv6msgdev); |
317 | kfree(idev->stats.icmpv6dev); | |
7d720c3e | 318 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b HX |
319 | } |
320 | ||
1da177e4 LT |
321 | /* Nobody refers to this device, we may destroy it. */ |
322 | ||
323 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
324 | { | |
325 | struct net_device *dev = idev->dev; | |
547b792c | 326 | |
502a2ffd | 327 | WARN_ON(!list_empty(&idev->addr_list)); |
547b792c IJ |
328 | WARN_ON(idev->mc_list != NULL); |
329 | ||
1da177e4 | 330 | #ifdef NET_REFCNT_DEBUG |
91df42be | 331 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); |
1da177e4 LT |
332 | #endif |
333 | dev_put(dev); | |
334 | if (!idev->dead) { | |
f3213831 | 335 | pr_warn("Freeing alive inet6 device %p\n", idev); |
1da177e4 LT |
336 | return; |
337 | } | |
338 | snmp6_free_dev(idev); | |
38f57d1a | 339 | kfree_rcu(idev, rcu); |
1da177e4 | 340 | } |
7159039a YH |
341 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
342 | ||
8e5e8f30 | 343 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
344 | { |
345 | struct inet6_dev *ndev; | |
346 | ||
347 | ASSERT_RTNL(); | |
348 | ||
349 | if (dev->mtu < IPV6_MIN_MTU) | |
350 | return NULL; | |
351 | ||
1ab1457c | 352 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 353 | |
1ab1457c YH |
354 | if (ndev == NULL) |
355 | return NULL; | |
322f74a4 IO |
356 | |
357 | rwlock_init(&ndev->lock); | |
358 | ndev->dev = dev; | |
502a2ffd | 359 | INIT_LIST_HEAD(&ndev->addr_list); |
360 | ||
c346dca1 | 361 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
362 | ndev->cnf.mtu6 = dev->mtu; |
363 | ndev->cnf.sysctl = NULL; | |
364 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
365 | if (ndev->nd_parms == NULL) { | |
366 | kfree(ndev); | |
367 | return NULL; | |
368 | } | |
0187bdfb BH |
369 | if (ndev->cnf.forwarding) |
370 | dev_disable_lro(dev); | |
322f74a4 IO |
371 | /* We refer to the device */ |
372 | dev_hold(dev); | |
1da177e4 | 373 | |
322f74a4 IO |
374 | if (snmp6_alloc_dev(ndev) < 0) { |
375 | ADBG((KERN_WARNING | |
f3213831 | 376 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
0dc47877 | 377 | __func__, dev->name)); |
322f74a4 | 378 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
379 | dev_put(dev); |
380 | kfree(ndev); | |
322f74a4 IO |
381 | return NULL; |
382 | } | |
1da177e4 | 383 | |
322f74a4 IO |
384 | if (snmp6_register_dev(ndev) < 0) { |
385 | ADBG((KERN_WARNING | |
f3213831 | 386 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
0dc47877 | 387 | __func__, dev->name)); |
322f74a4 IO |
388 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
389 | ndev->dead = 1; | |
390 | in6_dev_finish_destroy(ndev); | |
391 | return NULL; | |
392 | } | |
393 | ||
394 | /* One reference from device. We must do this before | |
395 | * we invoke __ipv6_regen_rndid(). | |
396 | */ | |
397 | in6_dev_hold(ndev); | |
1da177e4 | 398 | |
1b34be74 YH |
399 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
400 | ndev->cnf.accept_dad = -1; | |
401 | ||
07a93626 | 402 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 403 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 404 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
405 | ndev->cnf.rtr_solicits = 0; |
406 | } | |
407 | #endif | |
408 | ||
1da177e4 | 409 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 410 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 411 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
412 | if ((dev->flags&IFF_LOOPBACK) || |
413 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 414 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 415 | dev->type == ARPHRD_SIT || |
0be669bb | 416 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
417 | ndev->cnf.use_tempaddr = -1; |
418 | } else { | |
419 | in6_dev_hold(ndev); | |
420 | ipv6_regen_rndid((unsigned long) ndev); | |
421 | } | |
1da177e4 | 422 | #endif |
914faa14 | 423 | ndev->token = in6addr_any; |
1da177e4 | 424 | |
f24e3d65 | 425 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
426 | ndev->if_flags |= IF_READY; |
427 | ||
322f74a4 IO |
428 | ipv6_mc_init_dev(ndev); |
429 | ndev->tstamp = jiffies; | |
f52295a9 | 430 | addrconf_sysctl_register(ndev); |
30c4cf57 | 431 | /* protected by rtnl_lock */ |
cf778b00 | 432 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 433 | |
2c5e8933 HFS |
434 | /* Join interface-local all-node multicast group */ |
435 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
436 | ||
d88ae4cc | 437 | /* Join all-node multicast group */ |
f3ee4010 | 438 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 439 | |
d6ddef9e | 440 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 441 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
442 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
443 | ||
1da177e4 LT |
444 | return ndev; |
445 | } | |
446 | ||
8e5e8f30 | 447 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
448 | { |
449 | struct inet6_dev *idev; | |
450 | ||
451 | ASSERT_RTNL(); | |
452 | ||
e21e8467 SH |
453 | idev = __in6_dev_get(dev); |
454 | if (!idev) { | |
455 | idev = ipv6_add_dev(dev); | |
456 | if (!idev) | |
1da177e4 LT |
457 | return NULL; |
458 | } | |
c5e33bdd | 459 | |
1da177e4 LT |
460 | if (dev->flags&IFF_UP) |
461 | ipv6_mc_up(idev); | |
462 | return idev; | |
463 | } | |
464 | ||
f3a1bfb1 ND |
465 | static int inet6_netconf_msgsize_devconf(int type) |
466 | { | |
467 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
468 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
469 | ||
76f8f6cb ND |
470 | /* type -1 is used for ALL */ |
471 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 472 | size += nla_total_size(4); |
b1afce95 | 473 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
474 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
475 | size += nla_total_size(4); | |
b1afce95 | 476 | #endif |
f3a1bfb1 ND |
477 | |
478 | return size; | |
479 | } | |
480 | ||
481 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
482 | struct ipv6_devconf *devconf, u32 portid, | |
483 | u32 seq, int event, unsigned int flags, | |
484 | int type) | |
485 | { | |
486 | struct nlmsghdr *nlh; | |
487 | struct netconfmsg *ncm; | |
488 | ||
489 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
490 | flags); | |
491 | if (nlh == NULL) | |
492 | return -EMSGSIZE; | |
493 | ||
494 | ncm = nlmsg_data(nlh); | |
495 | ncm->ncm_family = AF_INET6; | |
496 | ||
497 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
498 | goto nla_put_failure; | |
499 | ||
76f8f6cb ND |
500 | /* type -1 is used for ALL */ |
501 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
502 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
503 | goto nla_put_failure; | |
b1afce95 | 504 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
505 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
506 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
507 | devconf->mc_forwarding) < 0) | |
508 | goto nla_put_failure; | |
b1afce95 | 509 | #endif |
f3a1bfb1 ND |
510 | return nlmsg_end(skb, nlh); |
511 | ||
512 | nla_put_failure: | |
513 | nlmsg_cancel(skb, nlh); | |
514 | return -EMSGSIZE; | |
515 | } | |
516 | ||
d67b8c61 ND |
517 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
518 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
519 | { |
520 | struct sk_buff *skb; | |
521 | int err = -ENOBUFS; | |
522 | ||
523 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
524 | if (skb == NULL) | |
525 | goto errout; | |
526 | ||
527 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
528 | RTM_NEWNETCONF, 0, type); | |
529 | if (err < 0) { | |
530 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
531 | WARN_ON(err == -EMSGSIZE); | |
532 | kfree_skb(skb); | |
533 | goto errout; | |
534 | } | |
535 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
536 | return; | |
537 | errout: | |
bd779028 | 538 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
539 | } |
540 | ||
76f8f6cb ND |
541 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
542 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
543 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
544 | }; | |
545 | ||
546 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 547 | struct nlmsghdr *nlh) |
76f8f6cb ND |
548 | { |
549 | struct net *net = sock_net(in_skb->sk); | |
550 | struct nlattr *tb[NETCONFA_MAX+1]; | |
551 | struct netconfmsg *ncm; | |
552 | struct sk_buff *skb; | |
553 | struct ipv6_devconf *devconf; | |
554 | struct inet6_dev *in6_dev; | |
555 | struct net_device *dev; | |
556 | int ifindex; | |
557 | int err; | |
558 | ||
559 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
560 | devconf_ipv6_policy); | |
561 | if (err < 0) | |
562 | goto errout; | |
563 | ||
564 | err = EINVAL; | |
565 | if (!tb[NETCONFA_IFINDEX]) | |
566 | goto errout; | |
567 | ||
568 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
569 | switch (ifindex) { | |
570 | case NETCONFA_IFINDEX_ALL: | |
571 | devconf = net->ipv6.devconf_all; | |
572 | break; | |
573 | case NETCONFA_IFINDEX_DEFAULT: | |
574 | devconf = net->ipv6.devconf_dflt; | |
575 | break; | |
576 | default: | |
577 | dev = __dev_get_by_index(net, ifindex); | |
578 | if (dev == NULL) | |
579 | goto errout; | |
580 | in6_dev = __in6_dev_get(dev); | |
581 | if (in6_dev == NULL) | |
582 | goto errout; | |
583 | devconf = &in6_dev->cnf; | |
584 | break; | |
585 | } | |
586 | ||
587 | err = -ENOBUFS; | |
588 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
589 | if (skb == NULL) | |
590 | goto errout; | |
591 | ||
592 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
593 | NETLINK_CB(in_skb).portid, | |
594 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
595 | -1); | |
596 | if (err < 0) { | |
597 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
598 | WARN_ON(err == -EMSGSIZE); | |
599 | kfree_skb(skb); | |
600 | goto errout; | |
601 | } | |
602 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
603 | errout: | |
604 | return err; | |
605 | } | |
606 | ||
7a674200 ND |
607 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
608 | struct netlink_callback *cb) | |
609 | { | |
610 | struct net *net = sock_net(skb->sk); | |
611 | int h, s_h; | |
612 | int idx, s_idx; | |
613 | struct net_device *dev; | |
614 | struct inet6_dev *idev; | |
615 | struct hlist_head *head; | |
616 | ||
617 | s_h = cb->args[0]; | |
618 | s_idx = idx = cb->args[1]; | |
619 | ||
620 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
621 | idx = 0; | |
622 | head = &net->dev_index_head[h]; | |
623 | rcu_read_lock(); | |
63998ac2 ND |
624 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
625 | net->dev_base_seq; | |
7a674200 ND |
626 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
627 | if (idx < s_idx) | |
628 | goto cont; | |
629 | idev = __in6_dev_get(dev); | |
630 | if (!idev) | |
631 | goto cont; | |
632 | ||
633 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
634 | &idev->cnf, | |
635 | NETLINK_CB(cb->skb).portid, | |
636 | cb->nlh->nlmsg_seq, | |
637 | RTM_NEWNETCONF, | |
638 | NLM_F_MULTI, | |
639 | -1) <= 0) { | |
640 | rcu_read_unlock(); | |
641 | goto done; | |
642 | } | |
63998ac2 | 643 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
644 | cont: |
645 | idx++; | |
646 | } | |
647 | rcu_read_unlock(); | |
648 | } | |
649 | if (h == NETDEV_HASHENTRIES) { | |
650 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
651 | net->ipv6.devconf_all, | |
652 | NETLINK_CB(cb->skb).portid, | |
653 | cb->nlh->nlmsg_seq, | |
654 | RTM_NEWNETCONF, NLM_F_MULTI, | |
655 | -1) <= 0) | |
656 | goto done; | |
657 | else | |
658 | h++; | |
659 | } | |
660 | if (h == NETDEV_HASHENTRIES + 1) { | |
661 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
662 | net->ipv6.devconf_dflt, | |
663 | NETLINK_CB(cb->skb).portid, | |
664 | cb->nlh->nlmsg_seq, | |
665 | RTM_NEWNETCONF, NLM_F_MULTI, | |
666 | -1) <= 0) | |
667 | goto done; | |
668 | else | |
669 | h++; | |
670 | } | |
671 | done: | |
672 | cb->args[0] = h; | |
673 | cb->args[1] = idx; | |
674 | ||
675 | return skb->len; | |
676 | } | |
677 | ||
1da177e4 LT |
678 | #ifdef CONFIG_SYSCTL |
679 | static void dev_forward_change(struct inet6_dev *idev) | |
680 | { | |
681 | struct net_device *dev; | |
682 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
683 | |
684 | if (!idev) | |
685 | return; | |
686 | dev = idev->dev; | |
0187bdfb BH |
687 | if (idev->cnf.forwarding) |
688 | dev_disable_lro(dev); | |
1a940835 | 689 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 690 | if (idev->cnf.forwarding) { |
f3ee4010 | 691 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
692 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
693 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
694 | } else { | |
f3ee4010 | 695 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
696 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
697 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
698 | } | |
1da177e4 | 699 | } |
502a2ffd | 700 | |
701 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
702 | if (ifa->flags&IFA_F_TENTATIVE) |
703 | continue; | |
1da177e4 LT |
704 | if (idev->cnf.forwarding) |
705 | addrconf_join_anycast(ifa); | |
706 | else | |
707 | addrconf_leave_anycast(ifa); | |
708 | } | |
f3a1bfb1 ND |
709 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
710 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
711 | } |
712 | ||
713 | ||
e186932b | 714 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
715 | { |
716 | struct net_device *dev; | |
717 | struct inet6_dev *idev; | |
718 | ||
4acd4945 | 719 | for_each_netdev(net, dev) { |
1da177e4 LT |
720 | idev = __in6_dev_get(dev); |
721 | if (idev) { | |
e186932b PE |
722 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
723 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
724 | if (changed) |
725 | dev_forward_change(idev); | |
726 | } | |
1da177e4 | 727 | } |
1da177e4 | 728 | } |
c8fecf22 | 729 | |
013d97e9 | 730 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 731 | { |
bff16c2f | 732 | struct net *net; |
013d97e9 FR |
733 | int old; |
734 | ||
735 | if (!rtnl_trylock()) | |
736 | return restart_syscall(); | |
bff16c2f PE |
737 | |
738 | net = (struct net *)table->extra2; | |
013d97e9 FR |
739 | old = *p; |
740 | *p = newf; | |
b325fddb | 741 | |
013d97e9 | 742 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
743 | if ((!newf) ^ (!old)) |
744 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
745 | NETCONFA_IFINDEX_DEFAULT, | |
746 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
747 | rtnl_unlock(); |
748 | return 0; | |
88af182e | 749 | } |
c8fecf22 | 750 | |
e186932b | 751 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
752 | net->ipv6.devconf_dflt->forwarding = newf; |
753 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
754 | if ((!newf) ^ (!old)) |
755 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
756 | NETCONFA_IFINDEX_ALL, | |
757 | net->ipv6.devconf_all); | |
013d97e9 | 758 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 759 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 760 | rtnl_unlock(); |
c8fecf22 | 761 | |
013d97e9 | 762 | if (newf) |
7b4da532 | 763 | rt6_purge_dflt_routers(net); |
b325fddb | 764 | return 1; |
c8fecf22 | 765 | } |
1da177e4 LT |
766 | #endif |
767 | ||
5c578aed | 768 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
769 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
770 | { | |
c2e21293 | 771 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 772 | |
1da177e4 | 773 | #ifdef NET_REFCNT_DEBUG |
91df42be | 774 | pr_debug("%s\n", __func__); |
1da177e4 LT |
775 | #endif |
776 | ||
777 | in6_dev_put(ifp->idev); | |
778 | ||
779 | if (del_timer(&ifp->timer)) | |
e21e8467 | 780 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 | 781 | |
e9d3e084 | 782 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 783 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
784 | return; |
785 | } | |
94e187c0 | 786 | ip6_rt_put(ifp->rt); |
1da177e4 | 787 | |
e5785985 | 788 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
789 | } |
790 | ||
e55ffac6 BH |
791 | static void |
792 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
793 | { | |
502a2ffd | 794 | struct list_head *p; |
8a6ce0c0 | 795 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
796 | |
797 | /* | |
798 | * Each device address list is sorted in order of scope - | |
799 | * global before linklocal. | |
800 | */ | |
502a2ffd | 801 | list_for_each(p, &idev->addr_list) { |
802 | struct inet6_ifaddr *ifa | |
803 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 804 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
805 | break; |
806 | } | |
807 | ||
b54c9b98 | 808 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
809 | } |
810 | ||
ddbe5032 | 811 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 812 | { |
ddbe5032 | 813 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
814 | } |
815 | ||
1da177e4 LT |
816 | /* On success it returns ifp with increased reference count */ |
817 | ||
818 | static struct inet6_ifaddr * | |
819 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 820 | int scope, u32 flags) |
1da177e4 LT |
821 | { |
822 | struct inet6_ifaddr *ifa = NULL; | |
823 | struct rt6_info *rt; | |
3a88a81d | 824 | unsigned int hash; |
1da177e4 | 825 | int err = 0; |
d68b8270 YH |
826 | int addr_type = ipv6_addr_type(addr); |
827 | ||
828 | if (addr_type == IPV6_ADDR_ANY || | |
829 | addr_type & IPV6_ADDR_MULTICAST || | |
830 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
831 | addr_type & IPV6_ADDR_LOOPBACK)) | |
832 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 833 | |
8814c4b5 | 834 | rcu_read_lock_bh(); |
1da177e4 LT |
835 | if (idev->dead) { |
836 | err = -ENODEV; /*XXX*/ | |
837 | goto out2; | |
838 | } | |
839 | ||
56d417b1 | 840 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
841 | err = -EACCES; |
842 | goto out2; | |
843 | } | |
844 | ||
5c578aed | 845 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
846 | |
847 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 848 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
849 | ADBG(("ipv6_add_addr: already assigned\n")); |
850 | err = -EEXIST; | |
851 | goto out; | |
852 | } | |
853 | ||
322f74a4 | 854 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
855 | |
856 | if (ifa == NULL) { | |
857 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
858 | err = -ENOBUFS; | |
859 | goto out; | |
860 | } | |
861 | ||
8f031519 | 862 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
863 | if (IS_ERR(rt)) { |
864 | err = PTR_ERR(rt); | |
865 | goto out; | |
866 | } | |
867 | ||
4e3fd7a0 | 868 | ifa->addr = *addr; |
1da177e4 LT |
869 | |
870 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 871 | spin_lock_init(&ifa->state_lock); |
1da177e4 | 872 | init_timer(&ifa->timer); |
c2e21293 | 873 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
874 | ifa->timer.data = (unsigned long) ifa; |
875 | ifa->scope = scope; | |
876 | ifa->prefix_len = pfxlen; | |
877 | ifa->flags = flags | IFA_F_TENTATIVE; | |
878 | ifa->cstamp = ifa->tstamp = jiffies; | |
617fe29d | 879 | ifa->tokenized = false; |
1da177e4 | 880 | |
57f5f544 KF |
881 | ifa->rt = rt; |
882 | ||
1da177e4 LT |
883 | ifa->idev = idev; |
884 | in6_dev_hold(idev); | |
885 | /* For caller */ | |
886 | in6_ifa_hold(ifa); | |
887 | ||
888 | /* Add to big hash table */ | |
ddbe5032 | 889 | hash = inet6_addr_hash(addr); |
1da177e4 | 890 | |
5c578aed | 891 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 892 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
893 | |
894 | write_lock(&idev->lock); | |
895 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 896 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
897 | |
898 | #ifdef CONFIG_IPV6_PRIVACY | |
899 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 900 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
901 | in6_ifa_hold(ifa); |
902 | } | |
903 | #endif | |
904 | ||
1da177e4 LT |
905 | in6_ifa_hold(ifa); |
906 | write_unlock(&idev->lock); | |
907 | out2: | |
8814c4b5 | 908 | rcu_read_unlock_bh(); |
1da177e4 | 909 | |
fd92833a | 910 | if (likely(err == 0)) |
f88c91dd | 911 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
912 | else { |
913 | kfree(ifa); | |
914 | ifa = ERR_PTR(err); | |
915 | } | |
916 | ||
917 | return ifa; | |
918 | out: | |
5c578aed | 919 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
920 | goto out2; |
921 | } | |
922 | ||
923 | /* This function wants to get referenced ifp and releases it before return */ | |
924 | ||
925 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
926 | { | |
502a2ffd | 927 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 928 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 929 | int state; |
1da177e4 LT |
930 | int deleted = 0, onlink = 0; |
931 | unsigned long expires = jiffies; | |
932 | ||
4c5ff6a6 HX |
933 | spin_lock_bh(&ifp->state_lock); |
934 | state = ifp->state; | |
e9d3e084 | 935 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
936 | spin_unlock_bh(&ifp->state_lock); |
937 | ||
938 | if (state == INET6_IFADDR_STATE_DEAD) | |
939 | goto out; | |
1da177e4 | 940 | |
5c578aed | 941 | spin_lock_bh(&addrconf_hash_lock); |
942 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 943 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
944 | |
945 | write_lock_bh(&idev->lock); | |
946 | #ifdef CONFIG_IPV6_PRIVACY | |
947 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 948 | list_del(&ifp->tmp_list); |
949 | if (ifp->ifpub) { | |
950 | in6_ifa_put(ifp->ifpub); | |
951 | ifp->ifpub = NULL; | |
1da177e4 | 952 | } |
372e6c8f | 953 | __in6_ifa_put(ifp); |
1da177e4 LT |
954 | } |
955 | #endif | |
956 | ||
502a2ffd | 957 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 958 | if (ifa == ifp) { |
502a2ffd | 959 | list_del_init(&ifp->if_list); |
1da177e4 | 960 | __in6_ifa_put(ifp); |
502a2ffd | 961 | |
1da177e4 LT |
962 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
963 | break; | |
964 | deleted = 1; | |
1d142804 | 965 | continue; |
1da177e4 LT |
966 | } else if (ifp->flags & IFA_F_PERMANENT) { |
967 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
968 | ifp->prefix_len)) { | |
969 | if (ifa->flags & IFA_F_PERMANENT) { | |
970 | onlink = 1; | |
971 | if (deleted) | |
972 | break; | |
973 | } else { | |
974 | unsigned long lifetime; | |
975 | ||
976 | if (!onlink) | |
977 | onlink = -1; | |
978 | ||
979 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
980 | |
981 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
982 | /* | |
983 | * Note: Because this address is | |
984 | * not permanent, lifetime < | |
985 | * LONG_MAX / HZ here. | |
986 | */ | |
1da177e4 LT |
987 | if (time_before(expires, |
988 | ifa->tstamp + lifetime * HZ)) | |
989 | expires = ifa->tstamp + lifetime * HZ; | |
990 | spin_unlock(&ifa->lock); | |
991 | } | |
992 | } | |
993 | } | |
994 | } | |
995 | write_unlock_bh(&idev->lock); | |
996 | ||
b2238566 AV |
997 | addrconf_del_timer(ifp); |
998 | ||
1da177e4 LT |
999 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1000 | ||
f88c91dd | 1001 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1002 | |
1da177e4 LT |
1003 | /* |
1004 | * Purge or update corresponding prefix | |
1005 | * | |
1006 | * 1) we don't purge prefix here if address was not permanent. | |
1007 | * prefix is managed by its own lifetime. | |
1008 | * 2) if there're no addresses, delete prefix. | |
1009 | * 3) if there're still other permanent address(es), | |
1010 | * corresponding prefix is still permanent. | |
1011 | * 4) otherwise, update prefix lifetime to the | |
1012 | * longest valid lifetime among the corresponding | |
1013 | * addresses on the device. | |
1014 | * Note: subsequent RA will update lifetime. | |
1015 | * | |
1016 | * --yoshfuji | |
1017 | */ | |
1018 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
1019 | struct in6_addr prefix; | |
1020 | struct rt6_info *rt; | |
64c6d08e | 1021 | |
1da177e4 | 1022 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
1da177e4 | 1023 | |
21caa662 RK |
1024 | rt = addrconf_get_prefix_route(&prefix, |
1025 | ifp->prefix_len, | |
1026 | ifp->idev->dev, | |
1027 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1028 | ||
1029 | if (rt) { | |
1da177e4 | 1030 | if (onlink == 0) { |
e0a1ad73 | 1031 | ip6_del_rt(rt); |
1da177e4 LT |
1032 | rt = NULL; |
1033 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 1034 | rt6_set_expires(rt, expires); |
1da177e4 LT |
1035 | } |
1036 | } | |
94e187c0 | 1037 | ip6_rt_put(rt); |
1da177e4 LT |
1038 | } |
1039 | ||
c3968a85 DW |
1040 | /* clean up prefsrc entries */ |
1041 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1042 | out: |
1da177e4 LT |
1043 | in6_ifa_put(ifp); |
1044 | } | |
1045 | ||
1046 | #ifdef CONFIG_IPV6_PRIVACY | |
1047 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
1048 | { | |
1049 | struct inet6_dev *idev = ifp->idev; | |
1050 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1051 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1052 | unsigned long regen_advance; |
1da177e4 LT |
1053 | int tmp_plen; |
1054 | int ret = 0; | |
1055 | int max_addresses; | |
95c385b4 | 1056 | u32 addr_flags; |
76f793e3 | 1057 | unsigned long now = jiffies; |
1da177e4 LT |
1058 | |
1059 | write_lock(&idev->lock); | |
1060 | if (ift) { | |
1061 | spin_lock_bh(&ift->lock); | |
1062 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1063 | spin_unlock_bh(&ift->lock); | |
1064 | tmpaddr = &addr; | |
1065 | } else { | |
1066 | tmpaddr = NULL; | |
1067 | } | |
1068 | retry: | |
1069 | in6_dev_hold(idev); | |
1070 | if (idev->cnf.use_tempaddr <= 0) { | |
1071 | write_unlock(&idev->lock); | |
f3213831 | 1072 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1073 | in6_dev_put(idev); |
1074 | ret = -1; | |
1075 | goto out; | |
1076 | } | |
1077 | spin_lock_bh(&ifp->lock); | |
1078 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1079 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1080 | spin_unlock_bh(&ifp->lock); | |
1081 | write_unlock(&idev->lock); | |
f3213831 JP |
1082 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1083 | __func__); | |
1da177e4 LT |
1084 | in6_dev_put(idev); |
1085 | ret = -1; | |
1086 | goto out; | |
1087 | } | |
1088 | in6_ifa_hold(ifp); | |
1089 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1090 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1091 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1092 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1093 | tmp_valid_lft = min_t(__u32, |
1094 | ifp->valid_lft, | |
7a876b0e | 1095 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1096 | tmp_prefered_lft = min_t(__u32, |
1097 | ifp->prefered_lft, | |
7a876b0e | 1098 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1099 | idev->cnf.max_desync_factor); |
1da177e4 LT |
1100 | tmp_plen = ifp->prefix_len; |
1101 | max_addresses = idev->cnf.max_addresses; | |
1da177e4 LT |
1102 | tmp_tstamp = ifp->tstamp; |
1103 | spin_unlock_bh(&ifp->lock); | |
1104 | ||
eac55bf9 BB |
1105 | regen_advance = idev->cnf.regen_max_retry * |
1106 | idev->cnf.dad_transmits * | |
1107 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 1108 | write_unlock(&idev->lock); |
95c385b4 | 1109 | |
eac55bf9 BB |
1110 | /* A temporary address is created only if this calculated Preferred |
1111 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1112 | * an implementation must not create a temporary address with a zero | |
1113 | * Preferred Lifetime. | |
9b12db3d HK |
1114 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1115 | * temporary addresses being generated. | |
eac55bf9 | 1116 | */ |
9b12db3d HK |
1117 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1118 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1119 | in6_ifa_put(ifp); |
1120 | in6_dev_put(idev); | |
1121 | ret = -1; | |
1122 | goto out; | |
1123 | } | |
1124 | ||
95c385b4 NH |
1125 | addr_flags = IFA_F_TEMPORARY; |
1126 | /* set in addrconf_prefix_rcv() */ | |
1127 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1128 | addr_flags |= IFA_F_OPTIMISTIC; | |
1129 | ||
ad558a29 HFS |
1130 | ift = ipv6_add_addr(idev, &addr, tmp_plen, |
1131 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, | |
1132 | addr_flags); | |
1133 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1134 | in6_ifa_put(ifp); |
1135 | in6_dev_put(idev); | |
f3213831 | 1136 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 LT |
1137 | tmpaddr = &addr; |
1138 | write_lock(&idev->lock); | |
1139 | goto retry; | |
1140 | } | |
1141 | ||
1142 | spin_lock_bh(&ift->lock); | |
1143 | ift->ifpub = ifp; | |
1144 | ift->valid_lft = tmp_valid_lft; | |
1145 | ift->prefered_lft = tmp_prefered_lft; | |
76f793e3 | 1146 | ift->cstamp = now; |
1da177e4 LT |
1147 | ift->tstamp = tmp_tstamp; |
1148 | spin_unlock_bh(&ift->lock); | |
1149 | ||
cf22f9a2 | 1150 | addrconf_dad_start(ift); |
1da177e4 LT |
1151 | in6_ifa_put(ift); |
1152 | in6_dev_put(idev); | |
1153 | out: | |
1154 | return ret; | |
1155 | } | |
1156 | #endif | |
1157 | ||
1158 | /* | |
072047e4 | 1159 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1160 | */ |
a9b05723 YH |
1161 | enum { |
1162 | IPV6_SADDR_RULE_INIT = 0, | |
1163 | IPV6_SADDR_RULE_LOCAL, | |
1164 | IPV6_SADDR_RULE_SCOPE, | |
1165 | IPV6_SADDR_RULE_PREFERRED, | |
1166 | #ifdef CONFIG_IPV6_MIP6 | |
1167 | IPV6_SADDR_RULE_HOA, | |
1168 | #endif | |
1169 | IPV6_SADDR_RULE_OIF, | |
1170 | IPV6_SADDR_RULE_LABEL, | |
1171 | #ifdef CONFIG_IPV6_PRIVACY | |
1172 | IPV6_SADDR_RULE_PRIVACY, | |
1173 | #endif | |
1174 | IPV6_SADDR_RULE_ORCHID, | |
1175 | IPV6_SADDR_RULE_PREFIX, | |
1176 | IPV6_SADDR_RULE_MAX | |
1177 | }; | |
1178 | ||
072047e4 | 1179 | struct ipv6_saddr_score { |
a9b05723 YH |
1180 | int rule; |
1181 | int addr_type; | |
1182 | struct inet6_ifaddr *ifa; | |
1183 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1184 | int scopedist; | |
1185 | int matchlen; | |
072047e4 YH |
1186 | }; |
1187 | ||
a9b05723 | 1188 | struct ipv6_saddr_dst { |
9acd9f3a | 1189 | const struct in6_addr *addr; |
a9b05723 YH |
1190 | int ifindex; |
1191 | int scope; | |
1192 | int label; | |
7cbca67c | 1193 | unsigned int prefs; |
a9b05723 | 1194 | }; |
072047e4 | 1195 | |
b6f99a21 | 1196 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1197 | { |
45bb0060 | 1198 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1199 | return 1; |
1200 | return 0; | |
1da177e4 LT |
1201 | } |
1202 | ||
3de23255 BT |
1203 | static int ipv6_get_saddr_eval(struct net *net, |
1204 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1205 | struct ipv6_saddr_dst *dst, |
1206 | int i) | |
1207 | { | |
1208 | int ret; | |
1209 | ||
1210 | if (i <= score->rule) { | |
1211 | switch (i) { | |
1212 | case IPV6_SADDR_RULE_SCOPE: | |
1213 | ret = score->scopedist; | |
1214 | break; | |
1215 | case IPV6_SADDR_RULE_PREFIX: | |
1216 | ret = score->matchlen; | |
1217 | break; | |
1218 | default: | |
1219 | ret = !!test_bit(i, score->scorebits); | |
1220 | } | |
1221 | goto out; | |
1222 | } | |
1223 | ||
1224 | switch (i) { | |
1225 | case IPV6_SADDR_RULE_INIT: | |
1226 | /* Rule 0: remember if hiscore is not ready yet */ | |
1227 | ret = !!score->ifa; | |
1228 | break; | |
1229 | case IPV6_SADDR_RULE_LOCAL: | |
1230 | /* Rule 1: Prefer same address */ | |
1231 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1232 | break; | |
1233 | case IPV6_SADDR_RULE_SCOPE: | |
1234 | /* Rule 2: Prefer appropriate scope | |
1235 | * | |
1236 | * ret | |
1237 | * ^ | |
1238 | * -1 | d 15 | |
1239 | * ---+--+-+---> scope | |
1240 | * | | |
1241 | * | d is scope of the destination. | |
1242 | * B-d | \ | |
1243 | * | \ <- smaller scope is better if | |
1244 | * B-15 | \ if scope is enough for destinaion. | |
1245 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1246 | * d-C-1 | / | |
1247 | * |/ <- greater is better | |
1248 | * -C / if scope is not enough for destination. | |
1249 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1250 | * | |
1251 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1252 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1253 | * Assume B = 0 and we get C > 29. | |
1254 | */ | |
1255 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1256 | if (ret >= dst->scope) | |
1257 | ret = -ret; | |
1258 | else | |
1259 | ret -= 128; /* 30 is enough */ | |
1260 | score->scopedist = ret; | |
1261 | break; | |
1262 | case IPV6_SADDR_RULE_PREFERRED: | |
1263 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1264 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1265 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1266 | break; | |
1267 | #ifdef CONFIG_IPV6_MIP6 | |
1268 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1269 | { |
a9b05723 | 1270 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1271 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1272 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1273 | break; |
7cbca67c | 1274 | } |
a9b05723 YH |
1275 | #endif |
1276 | case IPV6_SADDR_RULE_OIF: | |
1277 | /* Rule 5: Prefer outgoing interface */ | |
1278 | ret = (!dst->ifindex || | |
1279 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1280 | break; | |
1281 | case IPV6_SADDR_RULE_LABEL: | |
1282 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1283 | ret = ipv6_addr_label(net, |
1284 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1285 | score->ifa->idev->dev->ifindex) == dst->label; |
1286 | break; | |
1287 | #ifdef CONFIG_IPV6_PRIVACY | |
1288 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1289 | { |
a9b05723 | 1290 | /* Rule 7: Prefer public address |
25985edc | 1291 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1292 | */ |
7cbca67c YH |
1293 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1294 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1295 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1296 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1297 | break; |
7cbca67c | 1298 | } |
a9b05723 YH |
1299 | #endif |
1300 | case IPV6_SADDR_RULE_ORCHID: | |
1301 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1302 | * non-ORCHID vs non-ORCHID | |
1303 | */ | |
1304 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1305 | ipv6_addr_orchid(dst->addr)); | |
1306 | break; | |
1307 | case IPV6_SADDR_RULE_PREFIX: | |
1308 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1309 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1310 | if (ret > score->ifa->prefix_len) | |
1311 | ret = score->ifa->prefix_len; | |
1312 | score->matchlen = ret; | |
a9b05723 YH |
1313 | break; |
1314 | default: | |
1315 | ret = 0; | |
1316 | } | |
1317 | ||
1318 | if (ret) | |
1319 | __set_bit(i, score->scorebits); | |
1320 | score->rule = i; | |
1321 | out: | |
1322 | return ret; | |
1323 | } | |
1324 | ||
b3f644fc | 1325 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1326 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1327 | struct in6_addr *saddr) |
1da177e4 | 1328 | { |
a9b05723 YH |
1329 | struct ipv6_saddr_score scores[2], |
1330 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1331 | struct ipv6_saddr_dst dst; |
072047e4 | 1332 | struct net_device *dev; |
a9b05723 | 1333 | int dst_type; |
1da177e4 | 1334 | |
a9b05723 YH |
1335 | dst_type = __ipv6_addr_type(daddr); |
1336 | dst.addr = daddr; | |
1337 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1338 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1339 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1340 | dst.prefs = prefs; |
a9b05723 YH |
1341 | |
1342 | hiscore->rule = -1; | |
1343 | hiscore->ifa = NULL; | |
1da177e4 | 1344 | |
8814c4b5 | 1345 | rcu_read_lock(); |
1da177e4 | 1346 | |
c6d14c84 | 1347 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1348 | struct inet6_dev *idev; |
072047e4 | 1349 | |
a9b05723 | 1350 | /* Candidate Source Address (section 4) |
072047e4 YH |
1351 | * - multicast and link-local destination address, |
1352 | * the set of candidate source address MUST only | |
1353 | * include addresses assigned to interfaces | |
1354 | * belonging to the same link as the outgoing | |
1355 | * interface. | |
1356 | * (- For site-local destination addresses, the | |
1357 | * set of candidate source addresses MUST only | |
1358 | * include addresses assigned to interfaces | |
1359 | * belonging to the same site as the outgoing | |
1360 | * interface.) | |
1361 | */ | |
a9b05723 YH |
1362 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1363 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1364 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1365 | continue; |
1da177e4 | 1366 | |
1da177e4 | 1367 | idev = __in6_dev_get(dev); |
072047e4 YH |
1368 | if (!idev) |
1369 | continue; | |
1370 | ||
1371 | read_lock_bh(&idev->lock); | |
502a2ffd | 1372 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1373 | int i; |
072047e4 | 1374 | |
a9b05723 | 1375 | /* |
6b3ae80a YH |
1376 | * - Tentative Address (RFC2462 section 5.4) |
1377 | * - A tentative address is not considered | |
1378 | * "assigned to an interface" in the traditional | |
95c385b4 | 1379 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1380 | * - Candidate Source Address (section 4) |
072047e4 YH |
1381 | * - In any case, anycast addresses, multicast |
1382 | * addresses, and the unspecified address MUST | |
1383 | * NOT be included in a candidate set. | |
1384 | */ | |
a9b05723 YH |
1385 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1386 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1387 | continue; |
a9b05723 YH |
1388 | |
1389 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1390 | ||
1391 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1392 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1393 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1394 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1395 | "assigned as unicast address on %s", |
1396 | dev->name); | |
1397 | continue; | |
1398 | } | |
1399 | ||
a9b05723 YH |
1400 | score->rule = -1; |
1401 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1402 | ||
1403 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1404 | int minihiscore, miniscore; | |
1405 | ||
3de23255 BT |
1406 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1407 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1408 | |
1409 | if (minihiscore > miniscore) { | |
1410 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1411 | score->scopedist > 0) { | |
1412 | /* | |
1413 | * special case: | |
1414 | * each remaining entry | |
1415 | * has too small (not enough) | |
1416 | * scope, because ifa entries | |
1417 | * are sorted by their scope | |
1418 | * values. | |
1419 | */ | |
1420 | goto try_nextdev; | |
1421 | } | |
1422 | break; | |
1423 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1424 | if (hiscore->ifa) |
1425 | in6_ifa_put(hiscore->ifa); | |
1426 | ||
1427 | in6_ifa_hold(score->ifa); | |
1428 | ||
a0bffffc | 1429 | swap(hiscore, score); |
a9b05723 YH |
1430 | |
1431 | /* restore our iterator */ | |
1432 | score->ifa = hiscore->ifa; | |
1433 | ||
1434 | break; | |
1da177e4 | 1435 | } |
072047e4 | 1436 | } |
1da177e4 | 1437 | } |
a9b05723 | 1438 | try_nextdev: |
072047e4 | 1439 | read_unlock_bh(&idev->lock); |
1da177e4 | 1440 | } |
8814c4b5 | 1441 | rcu_read_unlock(); |
1da177e4 | 1442 | |
a9b05723 | 1443 | if (!hiscore->ifa) |
072047e4 | 1444 | return -EADDRNOTAVAIL; |
1ab1457c | 1445 | |
4e3fd7a0 | 1446 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1447 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1448 | return 0; |
1da177e4 | 1449 | } |
5e5f3f0f | 1450 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1451 | |
36bddbad AW |
1452 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
1453 | unsigned char banned_flags) | |
1454 | { | |
1455 | struct inet6_ifaddr *ifp; | |
1456 | int err = -EADDRNOTAVAIL; | |
1457 | ||
1458 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
1459 | if (ifp->scope == IFA_LINK && | |
1460 | !(ifp->flags & banned_flags)) { | |
1461 | *addr = ifp->addr; | |
1462 | err = 0; | |
1463 | break; | |
1464 | } | |
1465 | } | |
1466 | return err; | |
1467 | } | |
1468 | ||
95c385b4 NH |
1469 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1470 | unsigned char banned_flags) | |
1da177e4 LT |
1471 | { |
1472 | struct inet6_dev *idev; | |
1473 | int err = -EADDRNOTAVAIL; | |
1474 | ||
8814c4b5 | 1475 | rcu_read_lock(); |
e21e8467 SH |
1476 | idev = __in6_dev_get(dev); |
1477 | if (idev) { | |
1da177e4 | 1478 | read_lock_bh(&idev->lock); |
36bddbad | 1479 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1480 | read_unlock_bh(&idev->lock); |
1481 | } | |
8814c4b5 | 1482 | rcu_read_unlock(); |
1da177e4 LT |
1483 | return err; |
1484 | } | |
1485 | ||
1486 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1487 | { | |
1488 | int cnt = 0; | |
1489 | struct inet6_ifaddr *ifp; | |
1490 | ||
1491 | read_lock_bh(&idev->lock); | |
502a2ffd | 1492 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1493 | cnt++; |
1494 | read_unlock_bh(&idev->lock); | |
1495 | return cnt; | |
1496 | } | |
1497 | ||
b71d1d42 | 1498 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1499 | const struct net_device *dev, int strict) |
1da177e4 | 1500 | { |
eedf042a | 1501 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1502 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1503 | |
5c578aed | 1504 | rcu_read_lock_bh(); |
b67bfe0d | 1505 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1506 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1507 | continue; |
1da177e4 | 1508 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1509 | !(ifp->flags&IFA_F_TENTATIVE) && |
1510 | (dev == NULL || ifp->idev->dev == dev || | |
1511 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1512 | rcu_read_unlock_bh(); | |
1513 | return 1; | |
1da177e4 LT |
1514 | } |
1515 | } | |
5c578aed | 1516 | |
eedf042a SH |
1517 | rcu_read_unlock_bh(); |
1518 | return 0; | |
1da177e4 | 1519 | } |
7159039a YH |
1520 | EXPORT_SYMBOL(ipv6_chk_addr); |
1521 | ||
3e81c6da DM |
1522 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1523 | struct net_device *dev) | |
1da177e4 | 1524 | { |
ddbe5032 | 1525 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1526 | struct inet6_ifaddr *ifp; |
1da177e4 | 1527 | |
b67bfe0d | 1528 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1529 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1530 | continue; |
1da177e4 LT |
1531 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1532 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1533 | return true; |
1da177e4 LT |
1534 | } |
1535 | } | |
3e81c6da | 1536 | return false; |
1da177e4 LT |
1537 | } |
1538 | ||
6ea2edb3 CB |
1539 | /* Compares an address/prefix_len with addresses on device @dev. |
1540 | * If one is found it returns true. | |
1541 | */ | |
1542 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1543 | const unsigned int prefix_len, struct net_device *dev) | |
1544 | { | |
1545 | struct inet6_dev *idev; | |
1546 | struct inet6_ifaddr *ifa; | |
1547 | bool ret = false; | |
1548 | ||
1549 | rcu_read_lock(); | |
1550 | idev = __in6_dev_get(dev); | |
1551 | if (idev) { | |
1552 | read_lock_bh(&idev->lock); | |
1553 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1554 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1555 | if (ret) | |
1556 | break; | |
1557 | } | |
1558 | read_unlock_bh(&idev->lock); | |
1559 | } | |
1560 | rcu_read_unlock(); | |
1561 | ||
1562 | return ret; | |
1563 | } | |
1564 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1565 | ||
b71d1d42 | 1566 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1567 | { |
1568 | struct inet6_dev *idev; | |
1569 | struct inet6_ifaddr *ifa; | |
1570 | int onlink; | |
1571 | ||
1572 | onlink = 0; | |
1573 | rcu_read_lock(); | |
1574 | idev = __in6_dev_get(dev); | |
1575 | if (idev) { | |
1576 | read_lock_bh(&idev->lock); | |
502a2ffd | 1577 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1578 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1579 | ifa->prefix_len); | |
1580 | if (onlink) | |
1581 | break; | |
1582 | } | |
1583 | read_unlock_bh(&idev->lock); | |
1584 | } | |
1585 | rcu_read_unlock(); | |
1586 | return onlink; | |
1587 | } | |
52eeeb84 YH |
1588 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1589 | ||
9acd9f3a | 1590 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1591 | struct net_device *dev, int strict) |
1da177e4 | 1592 | { |
b79d1d54 | 1593 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1594 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1595 | |
5c578aed | 1596 | rcu_read_lock_bh(); |
b67bfe0d | 1597 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1598 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1599 | continue; |
1da177e4 LT |
1600 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1601 | if (dev == NULL || ifp->idev->dev == dev || | |
1602 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1603 | result = ifp; |
1da177e4 LT |
1604 | in6_ifa_hold(ifp); |
1605 | break; | |
1606 | } | |
1607 | } | |
1608 | } | |
5c578aed | 1609 | rcu_read_unlock_bh(); |
1da177e4 | 1610 | |
b79d1d54 | 1611 | return result; |
1da177e4 LT |
1612 | } |
1613 | ||
1da177e4 LT |
1614 | /* Gets referenced address, destroys ifaddr */ |
1615 | ||
cc411d0b | 1616 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1617 | { |
1da177e4 LT |
1618 | if (ifp->flags&IFA_F_PERMANENT) { |
1619 | spin_lock_bh(&ifp->lock); | |
1620 | addrconf_del_timer(ifp); | |
1621 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1622 | if (dad_failed) |
1623 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1624 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1625 | if (dad_failed) |
1626 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1627 | in6_ifa_put(ifp); |
1628 | #ifdef CONFIG_IPV6_PRIVACY | |
1629 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1630 | struct inet6_ifaddr *ifpub; | |
1631 | spin_lock_bh(&ifp->lock); | |
1632 | ifpub = ifp->ifpub; | |
1633 | if (ifpub) { | |
1634 | in6_ifa_hold(ifpub); | |
1635 | spin_unlock_bh(&ifp->lock); | |
1636 | ipv6_create_tempaddr(ifpub, ifp); | |
1637 | in6_ifa_put(ifpub); | |
1638 | } else { | |
1639 | spin_unlock_bh(&ifp->lock); | |
1640 | } | |
1641 | ipv6_del_addr(ifp); | |
1642 | #endif | |
1643 | } else | |
1644 | ipv6_del_addr(ifp); | |
1645 | } | |
1646 | ||
f2344a13 HX |
1647 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1648 | { | |
1649 | int err = -ENOENT; | |
1650 | ||
1651 | spin_lock(&ifp->state_lock); | |
1652 | if (ifp->state == INET6_IFADDR_STATE_DAD) { | |
1653 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1654 | err = 0; | |
1655 | } | |
1656 | spin_unlock(&ifp->state_lock); | |
1657 | ||
1658 | return err; | |
1659 | } | |
1660 | ||
3c21edbd YH |
1661 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1662 | { | |
1b34be74 | 1663 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1664 | |
853dc2e0 UB |
1665 | if (addrconf_dad_end(ifp)) { |
1666 | in6_ifa_put(ifp); | |
f2344a13 | 1667 | return; |
853dc2e0 | 1668 | } |
f2344a13 | 1669 | |
e87cc472 JP |
1670 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1671 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1672 | |
1b34be74 YH |
1673 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1674 | struct in6_addr addr; | |
1675 | ||
1676 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1677 | addr.s6_addr32[1] = 0; | |
1678 | ||
1679 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1680 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1681 | /* DAD failed for link-local based on MAC address */ | |
1682 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1683 | |
f3213831 | 1684 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1685 | ifp->idev->dev->name); |
1b34be74 YH |
1686 | } |
1687 | } | |
1688 | ||
cc411d0b | 1689 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1690 | } |
1da177e4 LT |
1691 | |
1692 | /* Join to solicited addr multicast group. */ | |
1693 | ||
b71d1d42 | 1694 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1695 | { |
1696 | struct in6_addr maddr; | |
1697 | ||
1698 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1699 | return; | |
1700 | ||
1701 | addrconf_addr_solict_mult(addr, &maddr); | |
1702 | ipv6_dev_mc_inc(dev, &maddr); | |
1703 | } | |
1704 | ||
b71d1d42 | 1705 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1706 | { |
1707 | struct in6_addr maddr; | |
1708 | ||
1709 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1710 | return; | |
1711 | ||
1712 | addrconf_addr_solict_mult(addr, &maddr); | |
1713 | __ipv6_dev_mc_dec(idev, &maddr); | |
1714 | } | |
1715 | ||
20380731 | 1716 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1717 | { |
1718 | struct in6_addr addr; | |
2bda8a0c BM |
1719 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1720 | return; | |
1da177e4 LT |
1721 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1722 | if (ipv6_addr_any(&addr)) | |
1723 | return; | |
1724 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1725 | } | |
1726 | ||
20380731 | 1727 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1728 | { |
1729 | struct in6_addr addr; | |
32019e65 YH |
1730 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1731 | return; | |
1da177e4 LT |
1732 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1733 | if (ipv6_addr_any(&addr)) | |
1734 | return; | |
1735 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1736 | } | |
1737 | ||
073a8e0e YH |
1738 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1739 | { | |
1740 | if (dev->addr_len != ETH_ALEN) | |
1741 | return -1; | |
1742 | memcpy(eui, dev->dev_addr, 3); | |
1743 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1744 | ||
1745 | /* | |
1746 | * The zSeries OSA network cards can be shared among various | |
1747 | * OS instances, but the OSA cards have only one MAC address. | |
1748 | * This leads to duplicate address conflicts in conjunction | |
1749 | * with IPv6 if more than one instance uses the same card. | |
1750 | * | |
1751 | * The driver for these cards can deliver a unique 16-bit | |
1752 | * identifier for each instance sharing the same card. It is | |
1753 | * placed instead of 0xFFFE in the interface identifier. The | |
1754 | * "u" bit of the interface identifier is not inverted in this | |
1755 | * case. Hence the resulting interface identifier has local | |
1756 | * scope according to RFC2373. | |
1757 | */ | |
1758 | if (dev->dev_id) { | |
1759 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1760 | eui[4] = dev->dev_id & 0xFF; | |
1761 | } else { | |
1762 | eui[3] = 0xFF; | |
1763 | eui[4] = 0xFE; | |
1764 | eui[0] ^= 2; | |
1765 | } | |
1766 | return 0; | |
1767 | } | |
1768 | ||
06a4c1c5 | 1769 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1770 | { | |
1771 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1772 | return -1; | |
1773 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1774 | eui[0] ^= 2; |
06a4c1c5 | 1775 | return 0; |
1776 | } | |
1777 | ||
cb6bf355 YH |
1778 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1779 | { | |
1780 | union fwnet_hwaddr *ha; | |
1781 | ||
1782 | if (dev->addr_len != FWNET_ALEN) | |
1783 | return -1; | |
1784 | ||
1785 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1786 | ||
1787 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1788 | eui[0] ^= 2; | |
1789 | return 0; | |
1790 | } | |
1791 | ||
073a8e0e YH |
1792 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1793 | { | |
1794 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1795 | if (dev->addr_len != ARCNET_ALEN) | |
1796 | return -1; | |
1797 | memset(eui, 0, 7); | |
8e5e8f30 | 1798 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1799 | return 0; |
1800 | } | |
1801 | ||
1802 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1803 | { | |
1804 | if (dev->addr_len != INFINIBAND_ALEN) | |
1805 | return -1; | |
1806 | memcpy(eui, dev->dev_addr + 12, 8); | |
1807 | eui[0] |= 2; | |
1808 | return 0; | |
1809 | } | |
1810 | ||
c61393ea | 1811 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1812 | { |
9af28511 SH |
1813 | if (addr == 0) |
1814 | return -1; | |
dfd982ba YH |
1815 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1816 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1817 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1818 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1819 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1820 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1821 | eui[1] = 0; | |
1822 | eui[2] = 0x5E; | |
1823 | eui[3] = 0xFE; | |
1824 | memcpy(eui + 4, &addr, 4); | |
1825 | return 0; | |
1826 | } | |
dfd982ba YH |
1827 | |
1828 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1829 | { | |
1830 | if (dev->priv_flags & IFF_ISATAP) | |
1831 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1832 | return -1; | |
1833 | } | |
1834 | ||
aee80b54 | 1835 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1836 | { | |
1837 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1838 | } | |
1839 | ||
1da177e4 LT |
1840 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1841 | { | |
1842 | switch (dev->type) { | |
1843 | case ARPHRD_ETHER: | |
1844 | case ARPHRD_FDDI: | |
073a8e0e | 1845 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1846 | case ARPHRD_ARCNET: |
073a8e0e | 1847 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1848 | case ARPHRD_INFINIBAND: |
073a8e0e | 1849 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1850 | case ARPHRD_SIT: |
dfd982ba | 1851 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1852 | case ARPHRD_IPGRE: |
1853 | return addrconf_ifid_gre(eui, dev); | |
06a4c1c5 | 1854 | case ARPHRD_IEEE802154: |
1855 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1856 | case ARPHRD_IEEE1394: |
1857 | return addrconf_ifid_ieee1394(eui, dev); | |
1da177e4 LT |
1858 | } |
1859 | return -1; | |
1860 | } | |
1861 | ||
1862 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1863 | { | |
1864 | int err = -1; | |
1865 | struct inet6_ifaddr *ifp; | |
1866 | ||
1867 | read_lock_bh(&idev->lock); | |
502a2ffd | 1868 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1869 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1870 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1871 | err = 0; | |
1872 | break; | |
1873 | } | |
1874 | } | |
1875 | read_unlock_bh(&idev->lock); | |
1876 | return err; | |
1877 | } | |
1878 | ||
1879 | #ifdef CONFIG_IPV6_PRIVACY | |
1880 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
eb7e0575 | 1881 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1882 | { |
1da177e4 | 1883 | regen: |
955189ef | 1884 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1885 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1886 | |
1887 | /* | |
1888 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1889 | * check if generated address is not inappropriate | |
1890 | * | |
1891 | * - Reserved subnet anycast (RFC 2526) | |
1892 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1893 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1894 | * 00-00-5E-FE-xx-xx-xx-xx |
1895 | * - value 0 | |
1896 | * - XXX: already assigned to an address on the device | |
1897 | */ | |
1ab1457c | 1898 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1899 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1900 | (idev->rndid[7]&0x80)) | |
1901 | goto regen; | |
1902 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1903 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1904 | goto regen; | |
1905 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1906 | goto regen; | |
1907 | } | |
1da177e4 LT |
1908 | } |
1909 | ||
1910 | static void ipv6_regen_rndid(unsigned long data) | |
1911 | { | |
1912 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1913 | unsigned long expires; | |
1914 | ||
8814c4b5 | 1915 | rcu_read_lock_bh(); |
1da177e4 LT |
1916 | write_lock_bh(&idev->lock); |
1917 | ||
1918 | if (idev->dead) | |
1919 | goto out; | |
1920 | ||
eb7e0575 | 1921 | __ipv6_regen_rndid(idev); |
1ab1457c | 1922 | |
1da177e4 | 1923 | expires = jiffies + |
1ab1457c | 1924 | idev->cnf.temp_prefered_lft * HZ - |
784e2710 BH |
1925 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
1926 | idev->cnf.max_desync_factor * HZ; | |
1da177e4 | 1927 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1928 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1929 | __func__, idev->dev->name); | |
1da177e4 LT |
1930 | goto out; |
1931 | } | |
1932 | ||
1933 | if (!mod_timer(&idev->regen_timer, expires)) | |
1934 | in6_dev_hold(idev); | |
1935 | ||
1936 | out: | |
1937 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1938 | rcu_read_unlock_bh(); |
1da177e4 LT |
1939 | in6_dev_put(idev); |
1940 | } | |
1941 | ||
eb7e0575 | 1942 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 1943 | { |
1da177e4 | 1944 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 1945 | __ipv6_regen_rndid(idev); |
1da177e4 LT |
1946 | } |
1947 | #endif | |
1948 | ||
1949 | /* | |
1950 | * Add prefix route. | |
1951 | */ | |
1952 | ||
1953 | static void | |
1954 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1955 | unsigned long expires, u32 flags) |
1da177e4 | 1956 | { |
86872cb5 TG |
1957 | struct fib6_config cfg = { |
1958 | .fc_table = RT6_TABLE_PREFIX, | |
1959 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1960 | .fc_ifindex = dev->ifindex, | |
1961 | .fc_expires = expires, | |
1962 | .fc_dst_len = plen, | |
1963 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1964 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1965 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1966 | }; |
1da177e4 | 1967 | |
4e3fd7a0 | 1968 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1969 | |
1970 | /* Prevent useless cloning on PtP SIT. | |
1971 | This thing is done here expecting that the whole | |
1972 | class of non-broadcast devices need not cloning. | |
1973 | */ | |
07a93626 | 1974 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
1975 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1976 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1977 | #endif |
1da177e4 | 1978 | |
86872cb5 | 1979 | ip6_route_add(&cfg); |
1da177e4 LT |
1980 | } |
1981 | ||
14ef37b6 AH |
1982 | |
1983 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
1984 | int plen, | |
1985 | const struct net_device *dev, | |
1986 | u32 flags, u32 noflags) | |
1987 | { | |
1988 | struct fib6_node *fn; | |
1989 | struct rt6_info *rt = NULL; | |
1990 | struct fib6_table *table; | |
1991 | ||
1992 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
1993 | if (table == NULL) | |
1994 | return NULL; | |
1995 | ||
5744dd9b | 1996 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
1997 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
1998 | if (!fn) | |
1999 | goto out; | |
2000 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 2001 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2002 | continue; |
2003 | if ((rt->rt6i_flags & flags) != flags) | |
2004 | continue; | |
85da53bf | 2005 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2006 | continue; |
2007 | dst_hold(&rt->dst); | |
2008 | break; | |
2009 | } | |
2010 | out: | |
5744dd9b | 2011 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2012 | return rt; |
2013 | } | |
2014 | ||
2015 | ||
1da177e4 LT |
2016 | /* Create "default" multicast route to the interface */ |
2017 | ||
2018 | static void addrconf_add_mroute(struct net_device *dev) | |
2019 | { | |
86872cb5 TG |
2020 | struct fib6_config cfg = { |
2021 | .fc_table = RT6_TABLE_LOCAL, | |
2022 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2023 | .fc_ifindex = dev->ifindex, | |
2024 | .fc_dst_len = 8, | |
2025 | .fc_flags = RTF_UP, | |
c346dca1 | 2026 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2027 | }; |
2028 | ||
2029 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2030 | ||
2031 | ip6_route_add(&cfg); | |
1da177e4 LT |
2032 | } |
2033 | ||
07a93626 | 2034 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2035 | static void sit_route_add(struct net_device *dev) |
2036 | { | |
86872cb5 TG |
2037 | struct fib6_config cfg = { |
2038 | .fc_table = RT6_TABLE_MAIN, | |
2039 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2040 | .fc_ifindex = dev->ifindex, | |
2041 | .fc_dst_len = 96, | |
2042 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 2043 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 2044 | }; |
1da177e4 LT |
2045 | |
2046 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 2047 | ip6_route_add(&cfg); |
1da177e4 | 2048 | } |
0be669bb | 2049 | #endif |
1da177e4 | 2050 | |
1da177e4 LT |
2051 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2052 | { | |
2053 | struct inet6_dev *idev; | |
2054 | ||
2055 | ASSERT_RTNL(); | |
2056 | ||
e21e8467 SH |
2057 | idev = ipv6_find_idev(dev); |
2058 | if (!idev) | |
64e724f6 BH |
2059 | return ERR_PTR(-ENOBUFS); |
2060 | ||
2061 | if (idev->cnf.disable_ipv6) | |
2062 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2063 | |
2064 | /* Add default multicast route */ | |
4af04aba LW |
2065 | if (!(dev->flags & IFF_LOOPBACK)) |
2066 | addrconf_add_mroute(dev); | |
1da177e4 | 2067 | |
1da177e4 LT |
2068 | return idev; |
2069 | } | |
2070 | ||
e6bff995 | 2071 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2072 | { |
2073 | struct prefix_info *pinfo; | |
2074 | __u32 valid_lft; | |
2075 | __u32 prefered_lft; | |
2076 | int addr_type; | |
1da177e4 | 2077 | struct inet6_dev *in6_dev; |
56d417b1 | 2078 | struct net *net = dev_net(dev); |
1da177e4 LT |
2079 | |
2080 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2081 | |
1da177e4 LT |
2082 | if (len < sizeof(struct prefix_info)) { |
2083 | ADBG(("addrconf: prefix option too short\n")); | |
2084 | return; | |
2085 | } | |
1ab1457c | 2086 | |
1da177e4 LT |
2087 | /* |
2088 | * Validation checks ([ADDRCONF], page 19) | |
2089 | */ | |
2090 | ||
2091 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2092 | ||
2093 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2094 | return; | |
2095 | ||
2096 | valid_lft = ntohl(pinfo->valid); | |
2097 | prefered_lft = ntohl(pinfo->prefered); | |
2098 | ||
2099 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2100 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2101 | return; |
2102 | } | |
2103 | ||
2104 | in6_dev = in6_dev_get(dev); | |
2105 | ||
2106 | if (in6_dev == NULL) { | |
e87cc472 JP |
2107 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2108 | dev->name); | |
1da177e4 LT |
2109 | return; |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * Two things going on here: | |
2114 | * 1) Add routes for on-link prefixes | |
2115 | * 2) Configure prefixes with the auto flag set | |
2116 | */ | |
2117 | ||
4bed72e4 YH |
2118 | if (pinfo->onlink) { |
2119 | struct rt6_info *rt; | |
2120 | unsigned long rt_expires; | |
2121 | ||
6f704992 YH |
2122 | /* Avoid arithmetic overflow. Really, we could |
2123 | * save rt_expires in seconds, likely valid_lft, | |
2124 | * but it would require division in fib gc, that it | |
2125 | * not good. | |
2126 | */ | |
4bed72e4 YH |
2127 | if (HZ > USER_HZ) |
2128 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2129 | else | |
2130 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2131 | |
4bed72e4 YH |
2132 | if (addrconf_finite_timeout(rt_expires)) |
2133 | rt_expires *= HZ; | |
1da177e4 | 2134 | |
14ef37b6 AH |
2135 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2136 | pinfo->prefix_len, | |
2137 | dev, | |
2138 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2139 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2140 | |
14ef37b6 | 2141 | if (rt) { |
6f704992 YH |
2142 | /* Autoconf prefix route */ |
2143 | if (valid_lft == 0) { | |
2144 | ip6_del_rt(rt); | |
2145 | rt = NULL; | |
4bed72e4 | 2146 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2147 | /* not infinity */ |
1716a961 | 2148 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2149 | } else { |
1716a961 | 2150 | rt6_clean_expires(rt); |
1da177e4 LT |
2151 | } |
2152 | } else if (valid_lft) { | |
6f704992 | 2153 | clock_t expires = 0; |
4bed72e4 YH |
2154 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2155 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2156 | /* not infinity */ |
2157 | flags |= RTF_EXPIRES; | |
2158 | expires = jiffies_to_clock_t(rt_expires); | |
2159 | } | |
1da177e4 | 2160 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2161 | dev, expires, flags); |
1da177e4 | 2162 | } |
94e187c0 | 2163 | ip6_rt_put(rt); |
1da177e4 LT |
2164 | } |
2165 | ||
2166 | /* Try to figure out our local address for this prefix */ | |
2167 | ||
2168 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2169 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2170 | struct in6_addr addr; |
2171 | int create = 0, update_lft = 0; | |
617fe29d | 2172 | bool tokenized = false; |
1da177e4 LT |
2173 | |
2174 | if (pinfo->prefix_len == 64) { | |
2175 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2176 | |
2177 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2178 | read_lock_bh(&in6_dev->lock); | |
2179 | memcpy(addr.s6_addr + 8, | |
2180 | in6_dev->token.s6_addr + 8, 8); | |
2181 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2182 | tokenized = true; |
f53adae4 DB |
2183 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2184 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2185 | in6_dev_put(in6_dev); |
2186 | return; | |
2187 | } | |
2188 | goto ok; | |
2189 | } | |
e87cc472 JP |
2190 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2191 | pinfo->prefix_len); | |
1da177e4 LT |
2192 | in6_dev_put(in6_dev); |
2193 | return; | |
2194 | ||
2195 | ok: | |
2196 | ||
53b7997f | 2197 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2198 | |
2199 | if (ifp == NULL && valid_lft) { | |
2200 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2201 | u32 addr_flags = 0; |
2202 | ||
2203 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2204 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2205 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2206 | addr_flags = IFA_F_OPTIMISTIC; |
2207 | #endif | |
1da177e4 LT |
2208 | |
2209 | /* Do not allow to create too much of autoconfigured | |
2210 | * addresses; this would be too easy way to crash kernel. | |
2211 | */ | |
2212 | if (!max_addresses || | |
2213 | ipv6_count_addresses(in6_dev) < max_addresses) | |
2214 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
2215 | addr_type&IPV6_ADDR_SCOPE_MASK, |
2216 | addr_flags); | |
1da177e4 | 2217 | |
3f0d2ba0 | 2218 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2219 | in6_dev_put(in6_dev); |
2220 | return; | |
2221 | } | |
2222 | ||
2223 | update_lft = create = 1; | |
2224 | ifp->cstamp = jiffies; | |
617fe29d | 2225 | ifp->tokenized = tokenized; |
cf22f9a2 | 2226 | addrconf_dad_start(ifp); |
1da177e4 LT |
2227 | } |
2228 | ||
2229 | if (ifp) { | |
2230 | int flags; | |
2231 | unsigned long now; | |
2232 | #ifdef CONFIG_IPV6_PRIVACY | |
2233 | struct inet6_ifaddr *ift; | |
2234 | #endif | |
2235 | u32 stored_lft; | |
2236 | ||
2237 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2238 | spin_lock(&ifp->lock); | |
2239 | now = jiffies; | |
2240 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2241 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2242 | else | |
2243 | stored_lft = 0; | |
2244 | if (!update_lft && stored_lft) { | |
2245 | if (valid_lft > MIN_VALID_LIFETIME || | |
2246 | valid_lft > stored_lft) | |
2247 | update_lft = 1; | |
2248 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
2249 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
2250 | /* |
2251 | * RFC 4862 Section 5.5.3e: | |
2252 | * "Note that the preferred lifetime of | |
2253 | * the corresponding address is always | |
2254 | * reset to the Preferred Lifetime in | |
2255 | * the received Prefix Information | |
2256 | * option, regardless of whether the | |
2257 | * valid lifetime is also reset or | |
2258 | * ignored." | |
2259 | * | |
2260 | * So if the preferred lifetime in | |
2261 | * this advertisement is different | |
2262 | * than what we have stored, but the | |
2263 | * valid lifetime is invalid, just | |
2264 | * reset prefered_lft. | |
2265 | * | |
2266 | * We must set the valid lifetime | |
2267 | * to the stored lifetime since we'll | |
2268 | * be updating the timestamp below, | |
2269 | * else we'll set it back to the | |
25985edc | 2270 | * minimum. |
a1ed0526 BH |
2271 | */ |
2272 | if (prefered_lft != ifp->prefered_lft) { | |
2273 | valid_lft = stored_lft; | |
2274 | update_lft = 1; | |
2275 | } | |
1da177e4 LT |
2276 | } else { |
2277 | valid_lft = MIN_VALID_LIFETIME; | |
2278 | if (valid_lft < prefered_lft) | |
2279 | prefered_lft = valid_lft; | |
2280 | update_lft = 1; | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | if (update_lft) { | |
2285 | ifp->valid_lft = valid_lft; | |
2286 | ifp->prefered_lft = prefered_lft; | |
2287 | ifp->tstamp = now; | |
2288 | flags = ifp->flags; | |
2289 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2290 | spin_unlock(&ifp->lock); | |
2291 | ||
2292 | if (!(flags&IFA_F_TENTATIVE)) | |
2293 | ipv6_ifa_notify(0, ifp); | |
2294 | } else | |
2295 | spin_unlock(&ifp->lock); | |
2296 | ||
2297 | #ifdef CONFIG_IPV6_PRIVACY | |
2298 | read_lock_bh(&in6_dev->lock); | |
2299 | /* update all temporary addresses in the list */ | |
76f793e3 LC |
2300 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
2301 | tmp_list) { | |
2302 | int age, max_valid, max_prefered; | |
2303 | ||
c6fbfac2 BB |
2304 | if (ifp != ift->ifpub) |
2305 | continue; | |
2306 | ||
76f793e3 LC |
2307 | /* |
2308 | * RFC 4941 section 3.3: | |
2309 | * If a received option will extend the lifetime | |
2310 | * of a public address, the lifetimes of | |
2311 | * temporary addresses should be extended, | |
2312 | * subject to the overall constraint that no | |
2313 | * temporary addresses should ever remain | |
2314 | * "valid" or "preferred" for a time longer than | |
2315 | * (TEMP_VALID_LIFETIME) or | |
2316 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), | |
2317 | * respectively. | |
2318 | */ | |
2319 | age = (now - ift->cstamp) / HZ; | |
2320 | max_valid = in6_dev->cnf.temp_valid_lft - age; | |
2321 | if (max_valid < 0) | |
2322 | max_valid = 0; | |
2323 | ||
2324 | max_prefered = in6_dev->cnf.temp_prefered_lft - | |
2325 | in6_dev->cnf.max_desync_factor - | |
2326 | age; | |
2327 | if (max_prefered < 0) | |
2328 | max_prefered = 0; | |
2329 | ||
2330 | if (valid_lft > max_valid) | |
2331 | valid_lft = max_valid; | |
2332 | ||
2333 | if (prefered_lft > max_prefered) | |
2334 | prefered_lft = max_prefered; | |
2335 | ||
1da177e4 LT |
2336 | spin_lock(&ift->lock); |
2337 | flags = ift->flags; | |
76f793e3 LC |
2338 | ift->valid_lft = valid_lft; |
2339 | ift->prefered_lft = prefered_lft; | |
2340 | ift->tstamp = now; | |
2341 | if (prefered_lft > 0) | |
2342 | ift->flags &= ~IFA_F_DEPRECATED; | |
2343 | ||
1da177e4 LT |
2344 | spin_unlock(&ift->lock); |
2345 | if (!(flags&IFA_F_TENTATIVE)) | |
2346 | ipv6_ifa_notify(0, ift); | |
2347 | } | |
2348 | ||
aed65501 | 2349 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4 | 2350 | /* |
76f793e3 LC |
2351 | * When a new public address is created as |
2352 | * described in [ADDRCONF], also create a new | |
2353 | * temporary address. Also create a temporary | |
2354 | * address if it's enabled but no temporary | |
2355 | * address currently exists. | |
1da177e4 | 2356 | */ |
1ab1457c | 2357 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2358 | ipv6_create_tempaddr(ifp, NULL); |
2359 | } else { | |
2360 | read_unlock_bh(&in6_dev->lock); | |
2361 | } | |
2362 | #endif | |
2363 | in6_ifa_put(ifp); | |
2364 | addrconf_verify(0); | |
2365 | } | |
2366 | } | |
2367 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2368 | in6_dev_put(in6_dev); | |
2369 | } | |
2370 | ||
2371 | /* | |
2372 | * Set destination address. | |
2373 | * Special case for SIT interfaces where we create a new "virtual" | |
2374 | * device. | |
2375 | */ | |
af284937 | 2376 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2377 | { |
2378 | struct in6_ifreq ireq; | |
2379 | struct net_device *dev; | |
2380 | int err = -EINVAL; | |
2381 | ||
2382 | rtnl_lock(); | |
2383 | ||
2384 | err = -EFAULT; | |
2385 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2386 | goto err_exit; | |
2387 | ||
af284937 | 2388 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2389 | |
2390 | err = -ENODEV; | |
2391 | if (dev == NULL) | |
2392 | goto err_exit; | |
2393 | ||
07a93626 | 2394 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2395 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2396 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2397 | struct ifreq ifr; |
1da177e4 LT |
2398 | struct ip_tunnel_parm p; |
2399 | ||
2400 | err = -EADDRNOTAVAIL; | |
2401 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2402 | goto err_exit; | |
2403 | ||
2404 | memset(&p, 0, sizeof(p)); | |
2405 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2406 | p.iph.saddr = 0; | |
2407 | p.iph.version = 4; | |
2408 | p.iph.ihl = 5; | |
2409 | p.iph.protocol = IPPROTO_IPV6; | |
2410 | p.iph.ttl = 64; | |
d20b3109 | 2411 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2412 | |
5bc3eb7e SH |
2413 | if (ops->ndo_do_ioctl) { |
2414 | mm_segment_t oldfs = get_fs(); | |
2415 | ||
2416 | set_fs(KERNEL_DS); | |
2417 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2418 | set_fs(oldfs); | |
2419 | } else | |
2420 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2421 | |
2422 | if (err == 0) { | |
2423 | err = -ENOBUFS; | |
af284937 DL |
2424 | dev = __dev_get_by_name(net, p.name); |
2425 | if (!dev) | |
1da177e4 LT |
2426 | goto err_exit; |
2427 | err = dev_open(dev); | |
2428 | } | |
2429 | } | |
0be669bb | 2430 | #endif |
1da177e4 LT |
2431 | |
2432 | err_exit: | |
2433 | rtnl_unlock(); | |
2434 | return err; | |
2435 | } | |
2436 | ||
2437 | /* | |
2438 | * Manual configuration of address on an interface | |
2439 | */ | |
b71d1d42 | 2440 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2441 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2442 | __u32 valid_lft) |
1da177e4 LT |
2443 | { |
2444 | struct inet6_ifaddr *ifp; | |
2445 | struct inet6_dev *idev; | |
2446 | struct net_device *dev; | |
2447 | int scope; | |
6f704992 YH |
2448 | u32 flags; |
2449 | clock_t expires; | |
4bed72e4 | 2450 | unsigned long timeout; |
1da177e4 LT |
2451 | |
2452 | ASSERT_RTNL(); | |
1ab1457c | 2453 | |
24ef0da7 TG |
2454 | if (plen > 128) |
2455 | return -EINVAL; | |
2456 | ||
0778769d NT |
2457 | /* check the lifetime */ |
2458 | if (!valid_lft || prefered_lft > valid_lft) | |
2459 | return -EINVAL; | |
2460 | ||
af284937 DL |
2461 | dev = __dev_get_by_index(net, ifindex); |
2462 | if (!dev) | |
1da177e4 | 2463 | return -ENODEV; |
1ab1457c | 2464 | |
64e724f6 BH |
2465 | idev = addrconf_add_dev(dev); |
2466 | if (IS_ERR(idev)) | |
2467 | return PTR_ERR(idev); | |
1da177e4 LT |
2468 | |
2469 | scope = ipv6_addr_scope(pfx); | |
2470 | ||
4bed72e4 YH |
2471 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2472 | if (addrconf_finite_timeout(timeout)) { | |
2473 | expires = jiffies_to_clock_t(timeout * HZ); | |
2474 | valid_lft = timeout; | |
6f704992 | 2475 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2476 | } else { |
2477 | expires = 0; | |
2478 | flags = 0; | |
2479 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2480 | } |
0778769d | 2481 | |
4bed72e4 YH |
2482 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2483 | if (addrconf_finite_timeout(timeout)) { | |
2484 | if (timeout == 0) | |
2485 | ifa_flags |= IFA_F_DEPRECATED; | |
2486 | prefered_lft = timeout; | |
2487 | } | |
0778769d NT |
2488 | |
2489 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2490 | ||
1da177e4 | 2491 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2492 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2493 | ifp->valid_lft = valid_lft; |
2494 | ifp->prefered_lft = prefered_lft; | |
2495 | ifp->tstamp = jiffies; | |
06aebfb7 | 2496 | spin_unlock_bh(&ifp->lock); |
0778769d | 2497 | |
46d48046 | 2498 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2499 | expires, flags); |
95c385b4 NH |
2500 | /* |
2501 | * Note that section 3.1 of RFC 4429 indicates | |
2502 | * that the Optimistic flag should not be set for | |
2503 | * manually configured addresses | |
2504 | */ | |
cf22f9a2 | 2505 | addrconf_dad_start(ifp); |
1da177e4 | 2506 | in6_ifa_put(ifp); |
0778769d | 2507 | addrconf_verify(0); |
1da177e4 LT |
2508 | return 0; |
2509 | } | |
2510 | ||
2511 | return PTR_ERR(ifp); | |
2512 | } | |
2513 | ||
b71d1d42 | 2514 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2515 | unsigned int plen) |
1da177e4 LT |
2516 | { |
2517 | struct inet6_ifaddr *ifp; | |
2518 | struct inet6_dev *idev; | |
2519 | struct net_device *dev; | |
1ab1457c | 2520 | |
24ef0da7 TG |
2521 | if (plen > 128) |
2522 | return -EINVAL; | |
2523 | ||
af284937 DL |
2524 | dev = __dev_get_by_index(net, ifindex); |
2525 | if (!dev) | |
1da177e4 LT |
2526 | return -ENODEV; |
2527 | ||
2528 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2529 | return -ENXIO; | |
2530 | ||
2531 | read_lock_bh(&idev->lock); | |
502a2ffd | 2532 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2533 | if (ifp->prefix_len == plen && |
2534 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2535 | in6_ifa_hold(ifp); | |
2536 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2537 | |
1da177e4 LT |
2538 | ipv6_del_addr(ifp); |
2539 | ||
2540 | /* If the last address is deleted administratively, | |
2541 | disable IPv6 on this interface. | |
2542 | */ | |
502a2ffd | 2543 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2544 | addrconf_ifdown(idev->dev, 1); |
2545 | return 0; | |
2546 | } | |
2547 | } | |
2548 | read_unlock_bh(&idev->lock); | |
2549 | return -EADDRNOTAVAIL; | |
2550 | } | |
2551 | ||
2552 | ||
af284937 | 2553 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2554 | { |
2555 | struct in6_ifreq ireq; | |
2556 | int err; | |
1ab1457c | 2557 | |
af31f412 | 2558 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2559 | return -EPERM; |
1ab1457c | 2560 | |
1da177e4 LT |
2561 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2562 | return -EFAULT; | |
2563 | ||
2564 | rtnl_lock(); | |
af284937 DL |
2565 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2566 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2567 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2568 | rtnl_unlock(); |
2569 | return err; | |
2570 | } | |
2571 | ||
af284937 | 2572 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2573 | { |
2574 | struct in6_ifreq ireq; | |
2575 | int err; | |
1ab1457c | 2576 | |
af31f412 | 2577 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2578 | return -EPERM; |
2579 | ||
2580 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2581 | return -EFAULT; | |
2582 | ||
2583 | rtnl_lock(); | |
af284937 DL |
2584 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2585 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2586 | rtnl_unlock(); |
2587 | return err; | |
2588 | } | |
2589 | ||
b5f348e5 IJ |
2590 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2591 | int plen, int scope) | |
2592 | { | |
2593 | struct inet6_ifaddr *ifp; | |
2594 | ||
2595 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2596 | if (!IS_ERR(ifp)) { | |
2597 | spin_lock_bh(&ifp->lock); | |
2598 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2599 | spin_unlock_bh(&ifp->lock); | |
2600 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2601 | in6_ifa_put(ifp); | |
2602 | } | |
2603 | } | |
2604 | ||
07a93626 | 2605 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2606 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2607 | { | |
1da177e4 LT |
2608 | struct in6_addr addr; |
2609 | struct net_device *dev; | |
c346dca1 | 2610 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2611 | int scope; |
2612 | ||
2613 | ASSERT_RTNL(); | |
2614 | ||
2615 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2616 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2617 | ||
2618 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2619 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2620 | scope = IFA_LINK; | |
2621 | } else { | |
2622 | scope = IPV6_ADDR_COMPATv4; | |
2623 | } | |
2624 | ||
2625 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2626 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2627 | return; |
2628 | } | |
2629 | ||
6fda7350 | 2630 | for_each_netdev(net, dev) { |
8e5e8f30 | 2631 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2632 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2633 | struct in_ifaddr *ifa; |
1da177e4 LT |
2634 | |
2635 | int flag = scope; | |
2636 | ||
2637 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2638 | int plen; | |
2639 | ||
2640 | addr.s6_addr32[3] = ifa->ifa_local; | |
2641 | ||
2642 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2643 | continue; | |
2644 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2645 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2646 | continue; | |
2647 | flag |= IFA_HOST; | |
2648 | } | |
2649 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2650 | plen = 64; | |
2651 | else | |
2652 | plen = 96; | |
2653 | ||
b5f348e5 | 2654 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2655 | } |
2656 | } | |
1ab1457c | 2657 | } |
1da177e4 | 2658 | } |
0be669bb | 2659 | #endif |
1da177e4 LT |
2660 | |
2661 | static void init_loopback(struct net_device *dev) | |
2662 | { | |
2663 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2664 | struct net_device *sp_dev; |
2665 | struct inet6_ifaddr *sp_ifa; | |
2666 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2667 | |
2668 | /* ::1 */ | |
2669 | ||
2670 | ASSERT_RTNL(); | |
2671 | ||
2672 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2673 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2674 | return; |
2675 | } | |
2676 | ||
b5f348e5 | 2677 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2678 | |
2679 | /* Add routes to other interface's IPv6 addresses */ | |
2680 | for_each_netdev(dev_net(dev), sp_dev) { | |
2681 | if (!strcmp(sp_dev->name, dev->name)) | |
2682 | continue; | |
2683 | ||
2684 | idev = __in6_dev_get(sp_dev); | |
2685 | if (!idev) | |
2686 | continue; | |
2687 | ||
2688 | read_lock_bh(&idev->lock); | |
2689 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2690 | ||
2691 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2692 | continue; | |
2693 | ||
8eb99ef8 G |
2694 | if (sp_ifa->rt) { |
2695 | /* This dst has been added to garbage list when | |
2696 | * lo device down, release this obsolete dst and | |
2697 | * reallocate a new router for ifa. | |
2698 | */ | |
2699 | if (sp_ifa->rt->dst.obsolete > 0) { | |
2700 | ip6_rt_put(sp_ifa->rt); | |
2701 | sp_ifa->rt = NULL; | |
2702 | } else { | |
2703 | continue; | |
2704 | } | |
2705 | } | |
a881ae1f | 2706 | |
25fb6ca4 BK |
2707 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0); |
2708 | ||
2709 | /* Failure cases are ignored */ | |
534c8779 G |
2710 | if (!IS_ERR(sp_rt)) { |
2711 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2712 | ip6_ins_rt(sp_rt); |
534c8779 | 2713 | } |
25fb6ca4 BK |
2714 | } |
2715 | read_unlock_bh(&idev->lock); | |
2716 | } | |
1da177e4 LT |
2717 | } |
2718 | ||
b71d1d42 | 2719 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2720 | { |
8e5e8f30 | 2721 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2722 | u32 addr_flags = IFA_F_PERMANENT; |
2723 | ||
2724 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2725 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2726 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2727 | addr_flags |= IFA_F_OPTIMISTIC; |
2728 | #endif | |
1da177e4 | 2729 | |
95c385b4 NH |
2730 | |
2731 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2732 | if (!IS_ERR(ifp)) { |
46d48046 | 2733 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2734 | addrconf_dad_start(ifp); |
1da177e4 LT |
2735 | in6_ifa_put(ifp); |
2736 | } | |
2737 | } | |
2738 | ||
2739 | static void addrconf_dev_config(struct net_device *dev) | |
2740 | { | |
2741 | struct in6_addr addr; | |
8e5e8f30 | 2742 | struct inet6_dev *idev; |
1da177e4 LT |
2743 | |
2744 | ASSERT_RTNL(); | |
2745 | ||
74235a25 HX |
2746 | if ((dev->type != ARPHRD_ETHER) && |
2747 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2748 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2749 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 YH |
2750 | (dev->type != ARPHRD_IEEE802154) && |
2751 | (dev->type != ARPHRD_IEEE1394)) { | |
74235a25 HX |
2752 | /* Alas, we support only Ethernet autoconfiguration. */ |
2753 | return; | |
2754 | } | |
2755 | ||
1da177e4 | 2756 | idev = addrconf_add_dev(dev); |
64e724f6 | 2757 | if (IS_ERR(idev)) |
1da177e4 LT |
2758 | return; |
2759 | ||
2760 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2761 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2762 | ||
2763 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2764 | addrconf_add_linklocal(idev, &addr); | |
2765 | } | |
2766 | ||
07a93626 | 2767 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2768 | static void addrconf_sit_config(struct net_device *dev) |
2769 | { | |
2770 | struct inet6_dev *idev; | |
2771 | ||
2772 | ASSERT_RTNL(); | |
2773 | ||
1ab1457c YH |
2774 | /* |
2775 | * Configure the tunnel with one of our IPv4 | |
2776 | * addresses... we should configure all of | |
1da177e4 LT |
2777 | * our v4 addrs in the tunnel |
2778 | */ | |
2779 | ||
2780 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2781 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2782 | return; |
2783 | } | |
2784 | ||
c7dc89c0 FT |
2785 | if (dev->priv_flags & IFF_ISATAP) { |
2786 | struct in6_addr addr; | |
2787 | ||
2788 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2789 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2790 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2791 | addrconf_add_linklocal(idev, &addr); | |
2792 | return; | |
2793 | } | |
2794 | ||
1da177e4 LT |
2795 | sit_add_v4_addrs(idev); |
2796 | ||
62b54dd9 | 2797 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2798 | addrconf_add_mroute(dev); |
62b54dd9 | 2799 | else |
1da177e4 LT |
2800 | sit_route_add(dev); |
2801 | } | |
0be669bb | 2802 | #endif |
1da177e4 | 2803 | |
07a93626 | 2804 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2805 | static void addrconf_gre_config(struct net_device *dev) |
2806 | { | |
2807 | struct inet6_dev *idev; | |
2808 | struct in6_addr addr; | |
2809 | ||
f3213831 | 2810 | pr_info("%s(%s)\n", __func__, dev->name); |
aee80b54 | 2811 | |
2812 | ASSERT_RTNL(); | |
2813 | ||
2814 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2815 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2816 | return; |
2817 | } | |
2818 | ||
2819 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2820 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2821 | ||
2822 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2823 | addrconf_add_linklocal(idev, &addr); | |
2824 | } | |
2825 | #endif | |
2826 | ||
1da177e4 LT |
2827 | static inline int |
2828 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2829 | { | |
2830 | struct in6_addr lladdr; | |
2831 | ||
95c385b4 | 2832 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2833 | addrconf_add_linklocal(idev, &lladdr); |
2834 | return 0; | |
2835 | } | |
2836 | return -1; | |
2837 | } | |
2838 | ||
2839 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2840 | { | |
2841 | struct net_device *link_dev; | |
c346dca1 | 2842 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2843 | |
2844 | /* first try to inherit the link-local address from the link device */ | |
2845 | if (idev->dev->iflink && | |
6fda7350 | 2846 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2847 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2848 | return; | |
2849 | } | |
2850 | /* then try to inherit it from any device */ | |
6fda7350 | 2851 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2852 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2853 | return; | |
2854 | } | |
91df42be | 2855 | pr_debug("init ip6-ip6: add_linklocal failed\n"); |
1da177e4 LT |
2856 | } |
2857 | ||
2858 | /* | |
2859 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2860 | * DHCPv6, MLD etc. can be run over the virtual link | |
2861 | */ | |
2862 | ||
2863 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2864 | { | |
2865 | struct inet6_dev *idev; | |
2866 | ||
2867 | ASSERT_RTNL(); | |
2868 | ||
e21e8467 | 2869 | idev = addrconf_add_dev(dev); |
64e724f6 | 2870 | if (IS_ERR(idev)) { |
91df42be | 2871 | pr_debug("init ip6-ip6: add_dev failed\n"); |
1da177e4 LT |
2872 | return; |
2873 | } | |
2874 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2875 | } |
2876 | ||
1ab1457c | 2877 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
8e5e8f30 | 2878 | void *data) |
1da177e4 LT |
2879 | { |
2880 | struct net_device *dev = (struct net_device *) data; | |
748e2d93 | 2881 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2882 | int run_pending = 0; |
b217d616 | 2883 | int err; |
1da177e4 | 2884 | |
e21e8467 | 2885 | switch (event) { |
45ba9dd2 | 2886 | case NETDEV_REGISTER: |
74235a25 | 2887 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2888 | idev = ipv6_add_dev(dev); |
2889 | if (!idev) | |
b217d616 | 2890 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2891 | } |
2892 | break; | |
bcdd553f | 2893 | |
1da177e4 | 2894 | case NETDEV_UP: |
3c21edbd | 2895 | case NETDEV_CHANGE: |
c2edacf8 JV |
2896 | if (dev->flags & IFF_SLAVE) |
2897 | break; | |
2898 | ||
3c21edbd | 2899 | if (event == NETDEV_UP) { |
f24e3d65 | 2900 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2901 | /* device is not ready yet. */ |
f3213831 | 2902 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2903 | dev->name); |
2904 | break; | |
2905 | } | |
99081049 | 2906 | |
d31c7b8f EP |
2907 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2908 | idev = ipv6_add_dev(dev); | |
2909 | ||
e3ec6cfc | 2910 | if (idev) { |
99081049 | 2911 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2912 | run_pending = 1; |
2913 | } | |
3c21edbd | 2914 | } else { |
f24e3d65 | 2915 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2916 | /* device is still not ready. */ |
2917 | break; | |
2918 | } | |
2919 | ||
2920 | if (idev) { | |
bcdd553f | 2921 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2922 | /* device is already configured. */ |
2923 | break; | |
3c21edbd YH |
2924 | idev->if_flags |= IF_READY; |
2925 | } | |
2926 | ||
f3213831 JP |
2927 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2928 | dev->name); | |
3c21edbd | 2929 | |
c5e33bdd | 2930 | run_pending = 1; |
3c21edbd YH |
2931 | } |
2932 | ||
e21e8467 | 2933 | switch (dev->type) { |
07a93626 | 2934 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2935 | case ARPHRD_SIT: |
2936 | addrconf_sit_config(dev); | |
2937 | break; | |
aee80b54 | 2938 | #endif |
07a93626 | 2939 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2940 | case ARPHRD_IPGRE: |
2941 | addrconf_gre_config(dev); | |
2942 | break; | |
0be669bb | 2943 | #endif |
1da177e4 LT |
2944 | case ARPHRD_TUNNEL6: |
2945 | addrconf_ip6_tnl_config(dev); | |
2946 | break; | |
2947 | case ARPHRD_LOOPBACK: | |
2948 | init_loopback(dev); | |
2949 | break; | |
2950 | ||
2951 | default: | |
2952 | addrconf_dev_config(dev); | |
2953 | break; | |
3ff50b79 | 2954 | } |
bcdd553f | 2955 | |
1da177e4 | 2956 | if (idev) { |
c5e33bdd YH |
2957 | if (run_pending) |
2958 | addrconf_dad_run(idev); | |
2959 | ||
bcdd553f SH |
2960 | /* |
2961 | * If the MTU changed during the interface down, | |
2962 | * when the interface up, the changed MTU must be | |
2963 | * reflected in the idev as well as routers. | |
1da177e4 | 2964 | */ |
bcdd553f SH |
2965 | if (idev->cnf.mtu6 != dev->mtu && |
2966 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2967 | rt6_mtu_change(dev, dev->mtu); |
2968 | idev->cnf.mtu6 = dev->mtu; | |
2969 | } | |
2970 | idev->tstamp = jiffies; | |
2971 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2972 | |
2973 | /* | |
2974 | * If the changed mtu during down is lower than | |
2975 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2976 | */ |
2977 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2978 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2979 | } |
2980 | break; | |
2981 | ||
2982 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2983 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2984 | rt6_mtu_change(dev, dev->mtu); |
2985 | idev->cnf.mtu6 = dev->mtu; | |
2986 | break; | |
2987 | } | |
2988 | ||
d31c7b8f EP |
2989 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2990 | idev = ipv6_add_dev(dev); | |
2991 | if (idev) | |
2992 | break; | |
2993 | } | |
2994 | ||
bcdd553f SH |
2995 | /* |
2996 | * MTU falled under IPV6_MIN_MTU. | |
2997 | * Stop IPv6 on this interface. | |
2998 | */ | |
1da177e4 LT |
2999 | |
3000 | case NETDEV_DOWN: | |
3001 | case NETDEV_UNREGISTER: | |
3002 | /* | |
3003 | * Remove all addresses from this interface. | |
3004 | */ | |
3005 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3006 | break; | |
3c21edbd | 3007 | |
1da177e4 | 3008 | case NETDEV_CHANGENAME: |
1da177e4 | 3009 | if (idev) { |
5632c515 | 3010 | snmp6_unregister_dev(idev); |
408c4768 | 3011 | addrconf_sysctl_unregister(idev); |
f52295a9 | 3012 | addrconf_sysctl_register(idev); |
b217d616 HX |
3013 | err = snmp6_register_dev(idev); |
3014 | if (err) | |
3015 | return notifier_from_errno(err); | |
5632c515 | 3016 | } |
1da177e4 | 3017 | break; |
bcdd553f | 3018 | |
93d9b7d7 JP |
3019 | case NETDEV_PRE_TYPE_CHANGE: |
3020 | case NETDEV_POST_TYPE_CHANGE: | |
3021 | addrconf_type_change(dev, event); | |
75c78500 | 3022 | break; |
3ff50b79 | 3023 | } |
1da177e4 LT |
3024 | |
3025 | return NOTIFY_OK; | |
3026 | } | |
3027 | ||
3028 | /* | |
3029 | * addrconf module should be notified of a device going up | |
3030 | */ | |
3031 | static struct notifier_block ipv6_dev_notf = { | |
3032 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3033 | }; |
3034 | ||
93d9b7d7 | 3035 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3036 | { |
3037 | struct inet6_dev *idev; | |
3038 | ASSERT_RTNL(); | |
3039 | ||
3040 | idev = __in6_dev_get(dev); | |
3041 | ||
93d9b7d7 | 3042 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3043 | ipv6_mc_remap(idev); |
93d9b7d7 | 3044 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3045 | ipv6_mc_unmap(idev); |
3046 | } | |
3047 | ||
1da177e4 LT |
3048 | static int addrconf_ifdown(struct net_device *dev, int how) |
3049 | { | |
c346dca1 | 3050 | struct net *net = dev_net(dev); |
502a2ffd | 3051 | struct inet6_dev *idev; |
3052 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3053 | int state, i; |
1da177e4 LT |
3054 | |
3055 | ASSERT_RTNL(); | |
3056 | ||
73a8bd74 DM |
3057 | rt6_ifdown(net, dev); |
3058 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3059 | |
3060 | idev = __in6_dev_get(dev); | |
3061 | if (idev == NULL) | |
3062 | return -ENODEV; | |
3063 | ||
bcdd553f SH |
3064 | /* |
3065 | * Step 1: remove reference to ipv6 device from parent device. | |
3066 | * Do not dev_put! | |
1da177e4 | 3067 | */ |
439e2385 | 3068 | if (how) { |
1da177e4 | 3069 | idev->dead = 1; |
8814c4b5 YH |
3070 | |
3071 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3072 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3073 | |
3074 | /* Step 1.5: remove snmp6 entry */ | |
3075 | snmp6_unregister_dev(idev); | |
3076 | ||
3077 | } | |
3078 | ||
73a8bd74 DM |
3079 | /* Step 2: clear hash table */ |
3080 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3081 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3082 | |
3083 | spin_lock_bh(&addrconf_hash_lock); | |
3084 | restart: | |
b67bfe0d | 3085 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3086 | if (ifa->idev == idev) { |
3087 | hlist_del_init_rcu(&ifa->addr_lst); | |
3088 | addrconf_del_timer(ifa); | |
3089 | goto restart; | |
3090 | } | |
3091 | } | |
3092 | spin_unlock_bh(&addrconf_hash_lock); | |
3093 | } | |
3094 | ||
1da177e4 LT |
3095 | write_lock_bh(&idev->lock); |
3096 | ||
bcdd553f | 3097 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3098 | if (!how) |
3c21edbd | 3099 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3100 | |
1da177e4 | 3101 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 3102 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3103 | in6_dev_put(idev); |
3104 | ||
bcdd553f | 3105 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3106 | while (!list_empty(&idev->tempaddr_list)) { |
3107 | ifa = list_first_entry(&idev->tempaddr_list, | |
3108 | struct inet6_ifaddr, tmp_list); | |
3109 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3110 | write_unlock_bh(&idev->lock); |
3111 | spin_lock_bh(&ifa->lock); | |
3112 | ||
3113 | if (ifa->ifpub) { | |
3114 | in6_ifa_put(ifa->ifpub); | |
3115 | ifa->ifpub = NULL; | |
3116 | } | |
3117 | spin_unlock_bh(&ifa->lock); | |
3118 | in6_ifa_put(ifa); | |
3119 | write_lock_bh(&idev->lock); | |
3120 | } | |
3121 | #endif | |
8f37ada5 | 3122 | |
502a2ffd | 3123 | while (!list_empty(&idev->addr_list)) { |
3124 | ifa = list_first_entry(&idev->addr_list, | |
3125 | struct inet6_ifaddr, if_list); | |
84e8b803 | 3126 | addrconf_del_timer(ifa); |
3127 | ||
73a8bd74 | 3128 | list_del(&ifa->if_list); |
84e8b803 | 3129 | |
73a8bd74 | 3130 | write_unlock_bh(&idev->lock); |
84e8b803 | 3131 | |
73a8bd74 DM |
3132 | spin_lock_bh(&ifa->state_lock); |
3133 | state = ifa->state; | |
3134 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3135 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 3136 | |
73a8bd74 DM |
3137 | if (state != INET6_IFADDR_STATE_DEAD) { |
3138 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3139 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3140 | } |
73a8bd74 | 3141 | in6_ifa_put(ifa); |
8f37ada5 | 3142 | |
73a8bd74 DM |
3143 | write_lock_bh(&idev->lock); |
3144 | } | |
8f37ada5 | 3145 | |
1da177e4 LT |
3146 | write_unlock_bh(&idev->lock); |
3147 | ||
3148 | /* Step 5: Discard multicast list */ | |
439e2385 | 3149 | if (how) |
1da177e4 LT |
3150 | ipv6_mc_destroy_dev(idev); |
3151 | else | |
3152 | ipv6_mc_down(idev); | |
3153 | ||
1da177e4 | 3154 | idev->tstamp = jiffies; |
1ab1457c | 3155 | |
bcdd553f | 3156 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3157 | if (how) { |
408c4768 | 3158 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3159 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3160 | neigh_ifdown(&nd_tbl, dev); | |
3161 | in6_dev_put(idev); | |
3162 | } | |
3163 | return 0; | |
3164 | } | |
3165 | ||
3166 | static void addrconf_rs_timer(unsigned long data) | |
3167 | { | |
3168 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 3169 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 3170 | |
5b2a1953 | 3171 | read_lock(&idev->lock); |
3172 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
3173 | goto out; |
3174 | ||
9ba2add3 | 3175 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3176 | goto out; |
3177 | ||
3178 | /* Announcement received after solicitation was sent */ | |
3179 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3180 | goto out; |
1da177e4 LT |
3181 | |
3182 | spin_lock(&ifp->lock); | |
5b2a1953 | 3183 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
3184 | /* The wait after the last probe can be shorter */ |
3185 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 3186 | (ifp->probes == idev->cnf.rtr_solicits) ? |
3187 | idev->cnf.rtr_solicit_delay : | |
3188 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
3189 | spin_unlock(&ifp->lock); |
3190 | ||
5b2a1953 | 3191 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
3192 | } else { |
3193 | spin_unlock(&ifp->lock); | |
3194 | /* | |
3195 | * Note: we do not support deprecated "all on-link" | |
3196 | * assumption any longer. | |
3197 | */ | |
91df42be | 3198 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3199 | } |
3200 | ||
3201 | out: | |
5b2a1953 | 3202 | read_unlock(&idev->lock); |
1da177e4 LT |
3203 | in6_ifa_put(ifp); |
3204 | } | |
3205 | ||
3206 | /* | |
3207 | * Duplicate Address Detection | |
3208 | */ | |
3c21edbd YH |
3209 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3210 | { | |
3211 | unsigned long rand_num; | |
3212 | struct inet6_dev *idev = ifp->idev; | |
3213 | ||
95c385b4 NH |
3214 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3215 | rand_num = 0; | |
3216 | else | |
3217 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
3218 | ||
3c21edbd YH |
3219 | ifp->probes = idev->cnf.dad_transmits; |
3220 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
3221 | } | |
3222 | ||
cf22f9a2 | 3223 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3224 | { |
3225 | struct inet6_dev *idev = ifp->idev; | |
3226 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3227 | |
3228 | addrconf_join_solict(dev, &ifp->addr); | |
3229 | ||
1da177e4 | 3230 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3231 | |
3232 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3233 | spin_lock(&ifp->lock); |
e9d3e084 | 3234 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3235 | goto out; |
1da177e4 LT |
3236 | |
3237 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3238 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3239 | !(ifp->flags&IFA_F_TENTATIVE) || |
3240 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3241 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3242 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3243 | read_unlock_bh(&idev->lock); |
3244 | ||
3245 | addrconf_dad_completed(ifp); | |
3246 | return; | |
3247 | } | |
3248 | ||
6732bade | 3249 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3250 | spin_unlock(&ifp->lock); |
6732bade | 3251 | read_unlock_bh(&idev->lock); |
3c21edbd | 3252 | /* |
590a9887 | 3253 | * If the device is not ready: |
3c21edbd YH |
3254 | * - keep it tentative if it is a permanent address. |
3255 | * - otherwise, kill it. | |
3256 | */ | |
3257 | in6_ifa_hold(ifp); | |
cc411d0b | 3258 | addrconf_dad_stop(ifp, 0); |
6732bade | 3259 | return; |
3c21edbd | 3260 | } |
95c385b4 NH |
3261 | |
3262 | /* | |
3263 | * Optimistic nodes can start receiving | |
3264 | * Frames right away | |
3265 | */ | |
e21e8467 | 3266 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
3267 | ip6_ins_rt(ifp->rt); |
3268 | ||
6732bade | 3269 | addrconf_dad_kick(ifp); |
1da177e4 | 3270 | out: |
622ccdf1 | 3271 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3272 | read_unlock_bh(&idev->lock); |
3273 | } | |
3274 | ||
3275 | static void addrconf_dad_timer(unsigned long data) | |
3276 | { | |
3277 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
3278 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
3279 | struct in6_addr mcaddr; |
3280 | ||
f2344a13 HX |
3281 | if (!ifp->probes && addrconf_dad_end(ifp)) |
3282 | goto out; | |
3283 | ||
122e4519 | 3284 | read_lock(&idev->lock); |
3285 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
3286 | read_unlock(&idev->lock); | |
1da177e4 LT |
3287 | goto out; |
3288 | } | |
21809faf | 3289 | |
3290 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3291 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3292 | spin_unlock(&ifp->lock); | |
3293 | read_unlock(&idev->lock); | |
3294 | goto out; | |
3295 | } | |
3296 | ||
1da177e4 LT |
3297 | if (ifp->probes == 0) { |
3298 | /* | |
3299 | * DAD was successful | |
3300 | */ | |
3301 | ||
cc411d0b | 3302 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3303 | spin_unlock(&ifp->lock); |
122e4519 | 3304 | read_unlock(&idev->lock); |
1da177e4 LT |
3305 | |
3306 | addrconf_dad_completed(ifp); | |
3307 | ||
3308 | goto out; | |
3309 | } | |
3310 | ||
3311 | ifp->probes--; | |
3312 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 3313 | spin_unlock(&ifp->lock); |
122e4519 | 3314 | read_unlock(&idev->lock); |
1da177e4 LT |
3315 | |
3316 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3317 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3318 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3319 | out: |
3320 | in6_ifa_put(ifp); | |
3321 | } | |
3322 | ||
3323 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3324 | { | |
e21e8467 | 3325 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
3326 | |
3327 | /* | |
3328 | * Configure the address for reception. Now it is valid. | |
3329 | */ | |
3330 | ||
3331 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3332 | ||
026359bc TA |
3333 | /* If added prefix is link local and we are prepared to process |
3334 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3335 | */ |
3336 | ||
aeaf6e9d | 3337 | if (ipv6_accept_ra(ifp->idev) && |
1da177e4 LT |
3338 | ifp->idev->cnf.rtr_solicits > 0 && |
3339 | (dev->flags&IFF_LOOPBACK) == 0 && | |
3340 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
3341 | /* |
3342 | * If a host as already performed a random delay | |
3343 | * [...] as part of DAD [...] there is no need | |
3344 | * to delay again before sending the first RS | |
3345 | */ | |
f3ee4010 | 3346 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
3347 | |
3348 | spin_lock_bh(&ifp->lock); | |
3349 | ifp->probes = 1; | |
3350 | ifp->idev->if_flags |= IF_RS_SENT; | |
3351 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
3352 | spin_unlock_bh(&ifp->lock); | |
3353 | } | |
3354 | } | |
3355 | ||
e21e8467 SH |
3356 | static void addrconf_dad_run(struct inet6_dev *idev) |
3357 | { | |
c5e33bdd YH |
3358 | struct inet6_ifaddr *ifp; |
3359 | ||
3360 | read_lock_bh(&idev->lock); | |
502a2ffd | 3361 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3362 | spin_lock(&ifp->lock); |
f2344a13 HX |
3363 | if (ifp->flags & IFA_F_TENTATIVE && |
3364 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3365 | addrconf_dad_kick(ifp); | |
21809faf | 3366 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3367 | } |
3368 | read_unlock_bh(&idev->lock); | |
3369 | } | |
3370 | ||
1da177e4 LT |
3371 | #ifdef CONFIG_PROC_FS |
3372 | struct if6_iter_state { | |
3c40090a | 3373 | struct seq_net_private p; |
1da177e4 | 3374 | int bucket; |
1d578303 | 3375 | int offset; |
1da177e4 LT |
3376 | }; |
3377 | ||
1d578303 | 3378 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3379 | { |
3380 | struct inet6_ifaddr *ifa = NULL; | |
3381 | struct if6_iter_state *state = seq->private; | |
1218854a | 3382 | struct net *net = seq_file_net(seq); |
1d578303 | 3383 | int p = 0; |
1da177e4 | 3384 | |
1d578303 MM |
3385 | /* initial bucket if pos is 0 */ |
3386 | if (pos == 0) { | |
3387 | state->bucket = 0; | |
3388 | state->offset = 0; | |
3389 | } | |
3390 | ||
3391 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3392 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3393 | addr_lst) { |
9f0d3c27 ED |
3394 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3395 | continue; | |
1d578303 MM |
3396 | /* sync with offset */ |
3397 | if (p < state->offset) { | |
3398 | p++; | |
3399 | continue; | |
3400 | } | |
3401 | state->offset++; | |
9f0d3c27 | 3402 | return ifa; |
1d578303 MM |
3403 | } |
3404 | ||
3405 | /* prepare for next bucket */ | |
3406 | state->offset = 0; | |
3407 | p = 0; | |
1da177e4 | 3408 | } |
c2e21293 | 3409 | return NULL; |
1da177e4 LT |
3410 | } |
3411 | ||
c2e21293 | 3412 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3413 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3414 | { |
3415 | struct if6_iter_state *state = seq->private; | |
1218854a | 3416 | struct net *net = seq_file_net(seq); |
1da177e4 | 3417 | |
b67bfe0d | 3418 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3419 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3420 | continue; | |
1d578303 | 3421 | state->offset++; |
9f0d3c27 | 3422 | return ifa; |
1d578303 | 3423 | } |
3c40090a | 3424 | |
c2e21293 | 3425 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3426 | state->offset = 0; |
b67bfe0d | 3427 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3428 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3429 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3430 | continue; | |
1d578303 | 3431 | state->offset++; |
9f0d3c27 | 3432 | return ifa; |
c2e21293 | 3433 | } |
1da177e4 | 3434 | } |
3c40090a | 3435 | |
c2e21293 | 3436 | return NULL; |
1da177e4 LT |
3437 | } |
3438 | ||
1da177e4 | 3439 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3440 | __acquires(rcu_bh) |
1da177e4 | 3441 | { |
5c578aed | 3442 | rcu_read_lock_bh(); |
1d578303 | 3443 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3444 | } |
3445 | ||
3446 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3447 | { | |
3448 | struct inet6_ifaddr *ifa; | |
3449 | ||
3450 | ifa = if6_get_next(seq, v); | |
3451 | ++*pos; | |
3452 | return ifa; | |
3453 | } | |
3454 | ||
3455 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3456 | __releases(rcu_bh) |
1da177e4 | 3457 | { |
5c578aed | 3458 | rcu_read_unlock_bh(); |
1da177e4 LT |
3459 | } |
3460 | ||
3461 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3462 | { | |
3463 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3464 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3465 | &ifp->addr, |
1da177e4 LT |
3466 | ifp->idev->dev->ifindex, |
3467 | ifp->prefix_len, | |
3468 | ifp->scope, | |
3469 | ifp->flags, | |
3470 | ifp->idev->dev->name); | |
3471 | return 0; | |
3472 | } | |
3473 | ||
56b3d975 | 3474 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3475 | .start = if6_seq_start, |
3476 | .next = if6_seq_next, | |
3477 | .show = if6_seq_show, | |
3478 | .stop = if6_seq_stop, | |
3479 | }; | |
3480 | ||
3481 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3482 | { | |
3c40090a DL |
3483 | return seq_open_net(inode, file, &if6_seq_ops, |
3484 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3485 | } |
3486 | ||
9a32144e | 3487 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3488 | .owner = THIS_MODULE, |
3489 | .open = if6_seq_open, | |
3490 | .read = seq_read, | |
3491 | .llseek = seq_lseek, | |
3c40090a | 3492 | .release = seq_release_net, |
1da177e4 LT |
3493 | }; |
3494 | ||
2c8c1e72 | 3495 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3496 | { |
d4beaa66 | 3497 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3498 | return -ENOMEM; |
3499 | return 0; | |
3500 | } | |
3501 | ||
2c8c1e72 | 3502 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3503 | { |
ece31ffd | 3504 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3505 | } |
3506 | ||
3507 | static struct pernet_operations if6_proc_net_ops = { | |
3508 | .init = if6_proc_net_init, | |
3509 | .exit = if6_proc_net_exit, | |
3510 | }; | |
3511 | ||
3512 | int __init if6_proc_init(void) | |
3513 | { | |
3514 | return register_pernet_subsys(&if6_proc_net_ops); | |
3515 | } | |
3516 | ||
1da177e4 LT |
3517 | void if6_proc_exit(void) |
3518 | { | |
3c40090a | 3519 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3520 | } |
3521 | #endif /* CONFIG_PROC_FS */ | |
3522 | ||
07a93626 | 3523 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3524 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3525 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3526 | { |
3527 | int ret = 0; | |
c2e21293 | 3528 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3529 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3530 | |
5c578aed | 3531 | rcu_read_lock_bh(); |
b67bfe0d | 3532 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3533 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3534 | continue; |
caad295f | 3535 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3536 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3537 | ret = 1; | |
3538 | break; | |
3539 | } | |
3540 | } | |
5c578aed | 3541 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3542 | return ret; |
3543 | } | |
3544 | #endif | |
3545 | ||
1da177e4 LT |
3546 | /* |
3547 | * Periodic address status verification | |
3548 | */ | |
3549 | ||
3550 | static void addrconf_verify(unsigned long foo) | |
3551 | { | |
b2db7564 | 3552 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3553 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3554 | int i; |
3555 | ||
5c578aed | 3556 | rcu_read_lock_bh(); |
3557 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3558 | now = jiffies; |
b2db7564 | 3559 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3560 | |
3561 | del_timer(&addr_chk_timer); | |
3562 | ||
bcdd553f | 3563 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3564 | restart: |
b67bfe0d | 3565 | hlist_for_each_entry_rcu_bh(ifp, |
5c578aed | 3566 | &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3567 | unsigned long age; |
1da177e4 LT |
3568 | |
3569 | if (ifp->flags & IFA_F_PERMANENT) | |
3570 | continue; | |
3571 | ||
3572 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3573 | /* We try to batch several events at once. */ |
3574 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3575 | |
8f27ebb9 YH |
3576 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3577 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3578 | spin_unlock(&ifp->lock); |
3579 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3580 | ipv6_del_addr(ifp); |
3581 | goto restart; | |
8f27ebb9 YH |
3582 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3583 | spin_unlock(&ifp->lock); | |
3584 | continue; | |
1da177e4 | 3585 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3586 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3587 | int deprecate = 0; |
3588 | ||
3589 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3590 | deprecate = 1; | |
3591 | ifp->flags |= IFA_F_DEPRECATED; | |
3592 | } | |
3593 | ||
3594 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3595 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3596 | ||
3597 | spin_unlock(&ifp->lock); | |
3598 | ||
3599 | if (deprecate) { | |
3600 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3601 | |
3602 | ipv6_ifa_notify(0, ifp); | |
3603 | in6_ifa_put(ifp); | |
3604 | goto restart; | |
3605 | } | |
3606 | #ifdef CONFIG_IPV6_PRIVACY | |
3607 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3608 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3609 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3610 | ifp->idev->cnf.dad_transmits * | |
3611 | ifp->idev->nd_parms->retrans_time / HZ; | |
3612 | ||
1da177e4 LT |
3613 | if (age >= ifp->prefered_lft - regen_advance) { |
3614 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3615 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3616 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3617 | if (!ifp->regen_count && ifpub) { | |
3618 | ifp->regen_count++; | |
3619 | in6_ifa_hold(ifp); | |
3620 | in6_ifa_hold(ifpub); | |
3621 | spin_unlock(&ifp->lock); | |
5c578aed | 3622 | |
291d809b HY |
3623 | spin_lock(&ifpub->lock); |
3624 | ifpub->regen_count = 0; | |
3625 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3626 | ipv6_create_tempaddr(ifpub, ifp); |
3627 | in6_ifa_put(ifpub); | |
3628 | in6_ifa_put(ifp); | |
3629 | goto restart; | |
3630 | } | |
3631 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3632 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3633 | spin_unlock(&ifp->lock); | |
3634 | #endif | |
3635 | } else { | |
3636 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3637 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3638 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3639 | spin_unlock(&ifp->lock); | |
3640 | } | |
3641 | } | |
1da177e4 LT |
3642 | } |
3643 | ||
b2db7564 YH |
3644 | next_sec = round_jiffies_up(next); |
3645 | next_sched = next; | |
3646 | ||
3647 | /* If rounded timeout is accurate enough, accept it. */ | |
3648 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3649 | next_sched = next_sec; | |
3650 | ||
3651 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3652 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3653 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3654 | ||
3655 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3656 | now, next, next_sec, next_sched)); | |
3657 | ||
3658 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3659 | add_timer(&addr_chk_timer); |
5c578aed | 3660 | spin_unlock(&addrconf_verify_lock); |
3661 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3662 | } |
3663 | ||
461d8837 TG |
3664 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3665 | { | |
3666 | struct in6_addr *pfx = NULL; | |
3667 | ||
3668 | if (addr) | |
3669 | pfx = nla_data(addr); | |
3670 | ||
3671 | if (local) { | |
3672 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3673 | pfx = NULL; | |
3674 | else | |
3675 | pfx = nla_data(local); | |
3676 | } | |
3677 | ||
3678 | return pfx; | |
3679 | } | |
3680 | ||
ef7c79ed | 3681 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3682 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3683 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3684 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3685 | }; | |
3686 | ||
1da177e4 | 3687 | static int |
661d2967 | 3688 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3689 | { |
3b1e0a65 | 3690 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3691 | struct ifaddrmsg *ifm; |
3692 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3693 | struct in6_addr *pfx; |
b933f716 | 3694 | int err; |
1da177e4 | 3695 | |
b933f716 TG |
3696 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3697 | if (err < 0) | |
3698 | return err; | |
3699 | ||
3700 | ifm = nlmsg_data(nlh); | |
3701 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3702 | if (pfx == NULL) |
3703 | return -EINVAL; | |
3704 | ||
af284937 | 3705 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3706 | } |
3707 | ||
55ebaef1 NT |
3708 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3709 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3710 | { |
6f704992 YH |
3711 | u32 flags; |
3712 | clock_t expires; | |
4bed72e4 | 3713 | unsigned long timeout; |
46d48046 | 3714 | |
081bba5b NT |
3715 | if (!valid_lft || (prefered_lft > valid_lft)) |
3716 | return -EINVAL; | |
3717 | ||
4bed72e4 YH |
3718 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3719 | if (addrconf_finite_timeout(timeout)) { | |
3720 | expires = jiffies_to_clock_t(timeout * HZ); | |
3721 | valid_lft = timeout; | |
6f704992 | 3722 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3723 | } else { |
3724 | expires = 0; | |
3725 | flags = 0; | |
3726 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3727 | } |
081bba5b | 3728 | |
4bed72e4 YH |
3729 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3730 | if (addrconf_finite_timeout(timeout)) { | |
3731 | if (timeout == 0) | |
3732 | ifa_flags |= IFA_F_DEPRECATED; | |
3733 | prefered_lft = timeout; | |
3734 | } | |
081bba5b NT |
3735 | |
3736 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3737 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3738 | ifp->tstamp = jiffies; |
3739 | ifp->valid_lft = valid_lft; | |
3740 | ifp->prefered_lft = prefered_lft; | |
3741 | ||
3742 | spin_unlock_bh(&ifp->lock); | |
3743 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3744 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3745 | |
46d48046 | 3746 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3747 | expires, flags); |
081bba5b NT |
3748 | addrconf_verify(0); |
3749 | ||
3750 | return 0; | |
3751 | } | |
3752 | ||
1da177e4 | 3753 | static int |
661d2967 | 3754 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3755 | { |
3b1e0a65 | 3756 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3757 | struct ifaddrmsg *ifm; |
3758 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3759 | struct in6_addr *pfx; |
7198f8ce TG |
3760 | struct inet6_ifaddr *ifa; |
3761 | struct net_device *dev; | |
55ebaef1 NT |
3762 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3763 | u8 ifa_flags; | |
461d8837 | 3764 | int err; |
1da177e4 | 3765 | |
461d8837 TG |
3766 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3767 | if (err < 0) | |
3768 | return err; | |
3769 | ||
3770 | ifm = nlmsg_data(nlh); | |
3771 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3772 | if (pfx == NULL) |
3773 | return -EINVAL; | |
3774 | ||
461d8837 | 3775 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3776 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3777 | |
3778 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3779 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3780 | preferred_lft = ci->ifa_prefered; |
3781 | } else { | |
3782 | preferred_lft = INFINITY_LIFE_TIME; | |
3783 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3784 | } |
3785 | ||
af284937 | 3786 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3787 | if (dev == NULL) |
3788 | return -ENODEV; | |
3789 | ||
55ebaef1 | 3790 | /* We ignore other flags so far. */ |
3b9f9a1c | 3791 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3792 | |
1cab3da6 | 3793 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3794 | if (ifa == NULL) { |
3795 | /* | |
3796 | * It would be best to check for !NLM_F_CREATE here but | |
3797 | * userspace alreay relies on not having to provide this. | |
3798 | */ | |
af284937 DL |
3799 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3800 | ifm->ifa_prefixlen, ifa_flags, | |
3801 | preferred_lft, valid_lft); | |
081bba5b NT |
3802 | } |
3803 | ||
7198f8ce TG |
3804 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3805 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3806 | err = -EEXIST; | |
3807 | else | |
55ebaef1 | 3808 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3809 | |
3810 | in6_ifa_put(ifa); | |
3811 | ||
3812 | return err; | |
1da177e4 LT |
3813 | } |
3814 | ||
101bb229 TG |
3815 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3816 | u8 scope, int ifindex) | |
3817 | { | |
3818 | struct ifaddrmsg *ifm; | |
3819 | ||
3820 | ifm = nlmsg_data(nlh); | |
3821 | ifm->ifa_family = AF_INET6; | |
3822 | ifm->ifa_prefixlen = prefixlen; | |
3823 | ifm->ifa_flags = flags; | |
3824 | ifm->ifa_scope = scope; | |
3825 | ifm->ifa_index = ifindex; | |
3826 | } | |
3827 | ||
85486af0 TG |
3828 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3829 | unsigned long tstamp, u32 preferred, u32 valid) | |
3830 | { | |
3831 | struct ifa_cacheinfo ci; | |
3832 | ||
18a31e1e TG |
3833 | ci.cstamp = cstamp_delta(cstamp); |
3834 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3835 | ci.ifa_prefered = preferred; |
3836 | ci.ifa_valid = valid; | |
3837 | ||
3838 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3839 | } | |
3840 | ||
101bb229 TG |
3841 | static inline int rt_scope(int ifa_scope) |
3842 | { | |
3843 | if (ifa_scope & IFA_HOST) | |
3844 | return RT_SCOPE_HOST; | |
3845 | else if (ifa_scope & IFA_LINK) | |
3846 | return RT_SCOPE_LINK; | |
3847 | else if (ifa_scope & IFA_SITE) | |
3848 | return RT_SCOPE_SITE; | |
3849 | else | |
3850 | return RT_SCOPE_UNIVERSE; | |
3851 | } | |
3852 | ||
0ab6803b TG |
3853 | static inline int inet6_ifaddr_msgsize(void) |
3854 | { | |
339bf98f TG |
3855 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3856 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3857 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3858 | } |
c5396a31 | 3859 | |
1da177e4 | 3860 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 3861 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3862 | { |
1da177e4 | 3863 | struct nlmsghdr *nlh; |
85486af0 | 3864 | u32 preferred, valid; |
1da177e4 | 3865 | |
15e47304 | 3866 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3867 | if (nlh == NULL) |
26932566 | 3868 | return -EMSGSIZE; |
0ab6803b | 3869 | |
101bb229 TG |
3870 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3871 | ifa->idev->dev->ifindex); | |
3872 | ||
1da177e4 | 3873 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3874 | preferred = ifa->prefered_lft; |
3875 | valid = ifa->valid_lft; | |
3876 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3877 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3878 | if (preferred > tval) |
3879 | preferred -= tval; | |
3880 | else | |
3881 | preferred = 0; | |
f56619fc BH |
3882 | if (valid != INFINITY_LIFE_TIME) { |
3883 | if (valid > tval) | |
3884 | valid -= tval; | |
3885 | else | |
3886 | valid = 0; | |
3887 | } | |
1da177e4 LT |
3888 | } |
3889 | } else { | |
85486af0 TG |
3890 | preferred = INFINITY_LIFE_TIME; |
3891 | valid = INFINITY_LIFE_TIME; | |
3892 | } | |
3893 | ||
0ab6803b | 3894 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3895 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3896 | nlmsg_cancel(skb, nlh); | |
3897 | return -EMSGSIZE; | |
3898 | } | |
1da177e4 | 3899 | |
0ab6803b | 3900 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3901 | } |
3902 | ||
3903 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 3904 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 3905 | { |
1da177e4 | 3906 | struct nlmsghdr *nlh; |
101bb229 TG |
3907 | u8 scope = RT_SCOPE_UNIVERSE; |
3908 | int ifindex = ifmca->idev->dev->ifindex; | |
3909 | ||
3910 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3911 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3912 | |
15e47304 | 3913 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3914 | if (nlh == NULL) |
26932566 | 3915 | return -EMSGSIZE; |
85486af0 | 3916 | |
0ab6803b TG |
3917 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3918 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3919 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3920 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3921 | nlmsg_cancel(skb, nlh); | |
3922 | return -EMSGSIZE; | |
3923 | } | |
85486af0 | 3924 | |
0ab6803b | 3925 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3926 | } |
3927 | ||
3928 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 3929 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3930 | { |
1da177e4 | 3931 | struct nlmsghdr *nlh; |
101bb229 TG |
3932 | u8 scope = RT_SCOPE_UNIVERSE; |
3933 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3934 | ||
3935 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3936 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3937 | |
15e47304 | 3938 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3939 | if (nlh == NULL) |
26932566 | 3940 | return -EMSGSIZE; |
85486af0 | 3941 | |
0ab6803b TG |
3942 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3943 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3944 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3945 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3946 | nlmsg_cancel(skb, nlh); | |
3947 | return -EMSGSIZE; | |
3948 | } | |
1da177e4 | 3949 | |
0ab6803b | 3950 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3951 | } |
3952 | ||
e21e8467 | 3953 | enum addr_type_t { |
1da177e4 LT |
3954 | UNICAST_ADDR, |
3955 | MULTICAST_ADDR, | |
3956 | ANYCAST_ADDR, | |
3957 | }; | |
3958 | ||
234b27c3 ED |
3959 | /* called with rcu_read_lock() */ |
3960 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3961 | struct netlink_callback *cb, enum addr_type_t type, | |
3962 | int s_ip_idx, int *p_ip_idx) | |
3963 | { | |
234b27c3 ED |
3964 | struct ifmcaddr6 *ifmca; |
3965 | struct ifacaddr6 *ifaca; | |
3966 | int err = 1; | |
3967 | int ip_idx = *p_ip_idx; | |
3968 | ||
3969 | read_lock_bh(&idev->lock); | |
3970 | switch (type) { | |
502a2ffd | 3971 | case UNICAST_ADDR: { |
3972 | struct inet6_ifaddr *ifa; | |
3973 | ||
234b27c3 | 3974 | /* unicast address incl. temp addr */ |
502a2ffd | 3975 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3976 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3977 | continue; |
3978 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 3979 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3980 | cb->nlh->nlmsg_seq, |
3981 | RTM_NEWADDR, | |
3982 | NLM_F_MULTI); | |
3983 | if (err <= 0) | |
3984 | break; | |
63998ac2 | 3985 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
3986 | } |
3987 | break; | |
502a2ffd | 3988 | } |
234b27c3 ED |
3989 | case MULTICAST_ADDR: |
3990 | /* multicast address */ | |
3991 | for (ifmca = idev->mc_list; ifmca; | |
3992 | ifmca = ifmca->next, ip_idx++) { | |
3993 | if (ip_idx < s_ip_idx) | |
3994 | continue; | |
3995 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 3996 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3997 | cb->nlh->nlmsg_seq, |
3998 | RTM_GETMULTICAST, | |
3999 | NLM_F_MULTI); | |
4000 | if (err <= 0) | |
4001 | break; | |
4002 | } | |
4003 | break; | |
4004 | case ANYCAST_ADDR: | |
4005 | /* anycast address */ | |
4006 | for (ifaca = idev->ac_list; ifaca; | |
4007 | ifaca = ifaca->aca_next, ip_idx++) { | |
4008 | if (ip_idx < s_ip_idx) | |
4009 | continue; | |
4010 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4011 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4012 | cb->nlh->nlmsg_seq, |
4013 | RTM_GETANYCAST, | |
4014 | NLM_F_MULTI); | |
4015 | if (err <= 0) | |
4016 | break; | |
4017 | } | |
4018 | break; | |
4019 | default: | |
4020 | break; | |
4021 | } | |
4022 | read_unlock_bh(&idev->lock); | |
4023 | *p_ip_idx = ip_idx; | |
4024 | return err; | |
4025 | } | |
4026 | ||
1da177e4 LT |
4027 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4028 | enum addr_type_t type) | |
4029 | { | |
234b27c3 ED |
4030 | struct net *net = sock_net(skb->sk); |
4031 | int h, s_h; | |
1da177e4 LT |
4032 | int idx, ip_idx; |
4033 | int s_idx, s_ip_idx; | |
1da177e4 | 4034 | struct net_device *dev; |
234b27c3 ED |
4035 | struct inet6_dev *idev; |
4036 | struct hlist_head *head; | |
1ab1457c | 4037 | |
234b27c3 ED |
4038 | s_h = cb->args[0]; |
4039 | s_idx = idx = cb->args[1]; | |
4040 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4041 | |
234b27c3 | 4042 | rcu_read_lock(); |
63998ac2 | 4043 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4044 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4045 | idx = 0; | |
4046 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4047 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4048 | if (idx < s_idx) |
4049 | goto cont; | |
4b97efdf | 4050 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4051 | s_ip_idx = 0; |
4052 | ip_idx = 0; | |
e21e8467 SH |
4053 | idev = __in6_dev_get(dev); |
4054 | if (!idev) | |
234b27c3 ED |
4055 | goto cont; |
4056 | ||
4057 | if (in6_dump_addrs(idev, skb, cb, type, | |
4058 | s_ip_idx, &ip_idx) <= 0) | |
4059 | goto done; | |
7562f876 | 4060 | cont: |
234b27c3 ED |
4061 | idx++; |
4062 | } | |
1da177e4 | 4063 | } |
234b27c3 ED |
4064 | done: |
4065 | rcu_read_unlock(); | |
4066 | cb->args[0] = h; | |
4067 | cb->args[1] = idx; | |
4068 | cb->args[2] = ip_idx; | |
4069 | ||
1da177e4 LT |
4070 | return skb->len; |
4071 | } | |
4072 | ||
4073 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4074 | { | |
4075 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4076 | |
1da177e4 LT |
4077 | return inet6_dump_addr(skb, cb, type); |
4078 | } | |
4079 | ||
4080 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4081 | { | |
4082 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4083 | |
1da177e4 LT |
4084 | return inet6_dump_addr(skb, cb, type); |
4085 | } | |
4086 | ||
4087 | ||
4088 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4089 | { | |
4090 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4091 | |
1da177e4 LT |
4092 | return inet6_dump_addr(skb, cb, type); |
4093 | } | |
4094 | ||
661d2967 | 4095 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4096 | { |
3b1e0a65 | 4097 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4098 | struct ifaddrmsg *ifm; |
4099 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
4100 | struct in6_addr *addr = NULL; |
4101 | struct net_device *dev = NULL; | |
4102 | struct inet6_ifaddr *ifa; | |
4103 | struct sk_buff *skb; | |
6c223828 NT |
4104 | int err; |
4105 | ||
1b29fc2c TG |
4106 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4107 | if (err < 0) | |
4108 | goto errout; | |
4109 | ||
4110 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
4111 | if (addr == NULL) { | |
4112 | err = -EINVAL; | |
4113 | goto errout; | |
6c223828 | 4114 | } |
6c223828 | 4115 | |
1b29fc2c | 4116 | ifm = nlmsg_data(nlh); |
6c223828 | 4117 | if (ifm->ifa_index) |
6fda7350 | 4118 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4119 | |
e21e8467 SH |
4120 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4121 | if (!ifa) { | |
1b29fc2c TG |
4122 | err = -EADDRNOTAVAIL; |
4123 | goto errout; | |
4124 | } | |
6c223828 | 4125 | |
e21e8467 SH |
4126 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4127 | if (!skb) { | |
6c223828 | 4128 | err = -ENOBUFS; |
1b29fc2c | 4129 | goto errout_ifa; |
6c223828 NT |
4130 | } |
4131 | ||
15e47304 | 4132 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4133 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4134 | if (err < 0) { |
4135 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4136 | WARN_ON(err == -EMSGSIZE); | |
4137 | kfree_skb(skb); | |
4138 | goto errout_ifa; | |
4139 | } | |
15e47304 | 4140 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4141 | errout_ifa: |
6c223828 | 4142 | in6_ifa_put(ifa); |
1b29fc2c | 4143 | errout: |
6c223828 | 4144 | return err; |
6c223828 NT |
4145 | } |
4146 | ||
1da177e4 LT |
4147 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4148 | { | |
4149 | struct sk_buff *skb; | |
c346dca1 | 4150 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4151 | int err = -ENOBUFS; |
1da177e4 | 4152 | |
0ab6803b | 4153 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
4154 | if (skb == NULL) |
4155 | goto errout; | |
4156 | ||
4157 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4158 | if (err < 0) { |
4159 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4160 | WARN_ON(err == -EMSGSIZE); | |
4161 | kfree_skb(skb); | |
4162 | goto errout; | |
4163 | } | |
1ce85fe4 PNA |
4164 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4165 | return; | |
5d620266 TG |
4166 | errout: |
4167 | if (err < 0) | |
6fda7350 | 4168 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4169 | } |
4170 | ||
b6f99a21 | 4171 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4172 | __s32 *array, int bytes) |
4173 | { | |
04561c1f TG |
4174 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4175 | ||
1da177e4 LT |
4176 | memset(array, 0, bytes); |
4177 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4178 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4179 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4180 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4181 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4182 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4183 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4184 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4185 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4186 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4187 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4188 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 LT |
4189 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
4190 | #ifdef CONFIG_IPV6_PRIVACY | |
4191 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
4192 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4193 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4194 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4195 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
4196 | #endif | |
4197 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 4198 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4199 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4200 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4201 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4202 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4203 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4204 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4205 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4206 | #endif | |
930d6ff2 | 4207 | #endif |
fbea49e1 | 4208 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4209 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4210 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4211 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
4212 | #endif | |
7bc570c8 YH |
4213 | #ifdef CONFIG_IPV6_MROUTE |
4214 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4215 | #endif | |
778d80be | 4216 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4217 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4218 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4219 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
1da177e4 LT |
4220 | } |
4221 | ||
b382b191 TG |
4222 | static inline size_t inet6_ifla6_size(void) |
4223 | { | |
4224 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4225 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4226 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4227 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4228 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4229 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4230 | } |
4231 | ||
339bf98f TG |
4232 | static inline size_t inet6_if_nlmsg_size(void) |
4233 | { | |
4234 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4235 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4236 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4237 | + nla_total_size(4) /* IFLA_MTU */ | |
4238 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4239 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4240 | } |
c5396a31 | 4241 | |
be281e55 | 4242 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4243 | int items, int bytes) |
7f7d9a6b HX |
4244 | { |
4245 | int i; | |
4246 | int pad = bytes - sizeof(u64) * items; | |
4247 | BUG_ON(pad < 0); | |
4248 | ||
4249 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4250 | put_unaligned(items, &stats[0]); | |
4251 | for (i = 1; i < items; i++) | |
be281e55 | 4252 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4253 | |
4254 | memset(&stats[items], 0, pad); | |
4255 | } | |
4256 | ||
4ce3c183 ED |
4257 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
4258 | int items, int bytes, size_t syncpoff) | |
4259 | { | |
4260 | int i; | |
4261 | int pad = bytes - sizeof(u64) * items; | |
4262 | BUG_ON(pad < 0); | |
4263 | ||
4264 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4265 | put_unaligned(items, &stats[0]); | |
4266 | for (i = 1; i < items; i++) | |
4267 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4268 | ||
4269 | memset(&stats[items], 0, pad); | |
4270 | } | |
4271 | ||
7f7d9a6b HX |
4272 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4273 | int bytes) | |
4274 | { | |
e21e8467 | 4275 | switch (attrtype) { |
7f7d9a6b | 4276 | case IFLA_INET6_STATS: |
4ce3c183 ED |
4277 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
4278 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4279 | break; |
4280 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4281 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4282 | break; |
4283 | } | |
4284 | } | |
4285 | ||
b382b191 TG |
4286 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4287 | { | |
4288 | struct nlattr *nla; | |
4289 | struct ifla_cacheinfo ci; | |
4290 | ||
c78679e8 DM |
4291 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4292 | goto nla_put_failure; | |
b382b191 | 4293 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4294 | ci.tstamp = cstamp_delta(idev->tstamp); |
4295 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
4296 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); | |
c78679e8 DM |
4297 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4298 | goto nla_put_failure; | |
b382b191 TG |
4299 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4300 | if (nla == NULL) | |
4301 | goto nla_put_failure; | |
4302 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4303 | ||
4304 | /* XXX - MC not implemented */ | |
4305 | ||
4306 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4307 | if (nla == NULL) | |
4308 | goto nla_put_failure; | |
4309 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4310 | ||
4311 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4312 | if (nla == NULL) | |
4313 | goto nla_put_failure; | |
4314 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4315 | ||
f53adae4 DB |
4316 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
4317 | if (nla == NULL) | |
4318 | goto nla_put_failure; | |
4319 | read_lock_bh(&idev->lock); | |
4320 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4321 | read_unlock_bh(&idev->lock); | |
4322 | ||
b382b191 TG |
4323 | return 0; |
4324 | ||
4325 | nla_put_failure: | |
4326 | return -EMSGSIZE; | |
4327 | } | |
4328 | ||
4329 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4330 | { | |
4331 | if (!__in6_dev_get(dev)) | |
4332 | return 0; | |
4333 | ||
4334 | return inet6_ifla6_size(); | |
4335 | } | |
4336 | ||
4337 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4338 | { | |
4339 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4340 | ||
4341 | if (!idev) | |
4342 | return -ENODATA; | |
4343 | ||
4344 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4345 | return -EMSGSIZE; | |
4346 | ||
4347 | return 0; | |
4348 | } | |
4349 | ||
f53adae4 DB |
4350 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4351 | { | |
f53adae4 DB |
4352 | struct inet6_ifaddr *ifp; |
4353 | struct net_device *dev = idev->dev; | |
fc403832 | 4354 | bool update_rs = false; |
dc848292 | 4355 | struct in6_addr ll_addr; |
f53adae4 DB |
4356 | |
4357 | if (token == NULL) | |
4358 | return -EINVAL; | |
4359 | if (ipv6_addr_any(token)) | |
4360 | return -EINVAL; | |
4361 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4362 | return -EINVAL; | |
f53adae4 DB |
4363 | if (!ipv6_accept_ra(idev)) |
4364 | return -EINVAL; | |
4365 | if (idev->cnf.rtr_solicits <= 0) | |
4366 | return -EINVAL; | |
4367 | ||
4368 | write_lock_bh(&idev->lock); | |
4369 | ||
4370 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4371 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4372 | ||
4373 | write_unlock_bh(&idev->lock); | |
4374 | ||
dc848292 HFS |
4375 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4376 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4377 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4378 | |
4379 | /* If we're not ready, then normal ifup will take care | |
4380 | * of this. Otherwise, we need to request our rs here. | |
4381 | */ | |
4382 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4383 | update_rs = true; | |
4384 | } | |
f53adae4 DB |
4385 | |
4386 | write_lock_bh(&idev->lock); | |
fc403832 DB |
4387 | |
4388 | if (update_rs) | |
4389 | idev->if_flags |= IF_RS_SENT; | |
f53adae4 DB |
4390 | |
4391 | /* Well, that's kinda nasty ... */ | |
4392 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4393 | spin_lock(&ifp->lock); | |
617fe29d | 4394 | if (ifp->tokenized) { |
f53adae4 DB |
4395 | ifp->valid_lft = 0; |
4396 | ifp->prefered_lft = 0; | |
4397 | } | |
4398 | spin_unlock(&ifp->lock); | |
4399 | } | |
4400 | ||
4401 | write_unlock_bh(&idev->lock); | |
4402 | return 0; | |
4403 | } | |
4404 | ||
4405 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
4406 | { | |
4407 | int err = -EINVAL; | |
4408 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4409 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4410 | ||
4411 | if (!idev) | |
4412 | return -EAFNOSUPPORT; | |
4413 | ||
4414 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4415 | BUG(); | |
4416 | ||
4417 | if (tb[IFLA_INET6_TOKEN]) | |
4418 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); | |
4419 | ||
4420 | return err; | |
4421 | } | |
4422 | ||
1ab1457c | 4423 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4424 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4425 | { |
04561c1f | 4426 | struct net_device *dev = idev->dev; |
04561c1f TG |
4427 | struct ifinfomsg *hdr; |
4428 | struct nlmsghdr *nlh; | |
4429 | void *protoinfo; | |
04561c1f | 4430 | |
15e47304 | 4431 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4432 | if (nlh == NULL) |
26932566 | 4433 | return -EMSGSIZE; |
04561c1f TG |
4434 | |
4435 | hdr = nlmsg_data(nlh); | |
4436 | hdr->ifi_family = AF_INET6; | |
4437 | hdr->__ifi_pad = 0; | |
4438 | hdr->ifi_type = dev->type; | |
4439 | hdr->ifi_index = dev->ifindex; | |
4440 | hdr->ifi_flags = dev_get_flags(dev); | |
4441 | hdr->ifi_change = 0; | |
4442 | ||
c78679e8 DM |
4443 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4444 | (dev->addr_len && | |
4445 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4446 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4447 | (dev->ifindex != dev->iflink && | |
4448 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4449 | goto nla_put_failure; | |
04561c1f TG |
4450 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4451 | if (protoinfo == NULL) | |
4452 | goto nla_put_failure; | |
1da177e4 | 4453 | |
b382b191 | 4454 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4455 | goto nla_put_failure; |
1da177e4 | 4456 | |
04561c1f TG |
4457 | nla_nest_end(skb, protoinfo); |
4458 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4459 | |
04561c1f | 4460 | nla_put_failure: |
26932566 PM |
4461 | nlmsg_cancel(skb, nlh); |
4462 | return -EMSGSIZE; | |
1da177e4 LT |
4463 | } |
4464 | ||
4465 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4466 | { | |
3b1e0a65 | 4467 | struct net *net = sock_net(skb->sk); |
84d2697d | 4468 | int h, s_h; |
434a8a58 | 4469 | int idx = 0, s_idx; |
1da177e4 LT |
4470 | struct net_device *dev; |
4471 | struct inet6_dev *idev; | |
84d2697d | 4472 | struct hlist_head *head; |
1da177e4 | 4473 | |
84d2697d ED |
4474 | s_h = cb->args[0]; |
4475 | s_idx = cb->args[1]; | |
4476 | ||
4477 | rcu_read_lock(); | |
4478 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4479 | idx = 0; | |
4480 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4481 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4482 | if (idx < s_idx) |
4483 | goto cont; | |
4484 | idev = __in6_dev_get(dev); | |
4485 | if (!idev) | |
4486 | goto cont; | |
4487 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4488 | NETLINK_CB(cb->skb).portid, |
84d2697d ED |
4489 | cb->nlh->nlmsg_seq, |
4490 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4491 | goto out; | |
7562f876 | 4492 | cont: |
84d2697d ED |
4493 | idx++; |
4494 | } | |
1da177e4 | 4495 | } |
84d2697d ED |
4496 | out: |
4497 | rcu_read_unlock(); | |
4498 | cb->args[1] = idx; | |
4499 | cb->args[0] = h; | |
1da177e4 LT |
4500 | |
4501 | return skb->len; | |
4502 | } | |
4503 | ||
4504 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4505 | { | |
4506 | struct sk_buff *skb; | |
c346dca1 | 4507 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4508 | int err = -ENOBUFS; |
1ab1457c | 4509 | |
339bf98f | 4510 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4511 | if (skb == NULL) |
4512 | goto errout; | |
4513 | ||
4514 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4515 | if (err < 0) { |
4516 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4517 | WARN_ON(err == -EMSGSIZE); | |
4518 | kfree_skb(skb); | |
4519 | goto errout; | |
4520 | } | |
5f75a104 | 4521 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4522 | return; |
8d7a76c9 TG |
4523 | errout: |
4524 | if (err < 0) | |
5f75a104 | 4525 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4526 | } |
4527 | ||
339bf98f TG |
4528 | static inline size_t inet6_prefix_nlmsg_size(void) |
4529 | { | |
4530 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4531 | + nla_total_size(sizeof(struct in6_addr)) | |
4532 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4533 | } | |
c5396a31 | 4534 | |
1da177e4 | 4535 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4536 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4537 | int event, unsigned int flags) |
1da177e4 | 4538 | { |
6051e2f4 TG |
4539 | struct prefixmsg *pmsg; |
4540 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4541 | struct prefix_cacheinfo ci; |
4542 | ||
15e47304 | 4543 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4544 | if (nlh == NULL) |
26932566 | 4545 | return -EMSGSIZE; |
6051e2f4 TG |
4546 | |
4547 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4548 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4549 | pmsg->prefix_pad1 = 0; |
4550 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4551 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4552 | pmsg->prefix_len = pinfo->prefix_len; | |
4553 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4554 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4555 | pmsg->prefix_flags = 0; |
4556 | if (pinfo->onlink) | |
4557 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4558 | if (pinfo->autoconf) | |
4559 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4560 | ||
c78679e8 DM |
4561 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4562 | goto nla_put_failure; | |
1da177e4 LT |
4563 | ci.preferred_time = ntohl(pinfo->prefered); |
4564 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4565 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4566 | goto nla_put_failure; | |
6051e2f4 | 4567 | return nlmsg_end(skb, nlh); |
1da177e4 | 4568 | |
6051e2f4 | 4569 | nla_put_failure: |
26932566 PM |
4570 | nlmsg_cancel(skb, nlh); |
4571 | return -EMSGSIZE; | |
1da177e4 LT |
4572 | } |
4573 | ||
1ab1457c | 4574 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4575 | struct prefix_info *pinfo) |
4576 | { | |
4577 | struct sk_buff *skb; | |
c346dca1 | 4578 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4579 | int err = -ENOBUFS; |
1da177e4 | 4580 | |
339bf98f | 4581 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4582 | if (skb == NULL) |
4583 | goto errout; | |
4584 | ||
4585 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4586 | if (err < 0) { |
4587 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4588 | WARN_ON(err == -EMSGSIZE); | |
4589 | kfree_skb(skb); | |
4590 | goto errout; | |
4591 | } | |
1ce85fe4 PNA |
4592 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4593 | return; | |
8c384bfa TG |
4594 | errout: |
4595 | if (err < 0) | |
6fda7350 | 4596 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4597 | } |
4598 | ||
1da177e4 LT |
4599 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4600 | { | |
63998ac2 ND |
4601 | struct net *net = dev_net(ifp->idev->dev); |
4602 | ||
1da177e4 LT |
4603 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
4604 | ||
4605 | switch (event) { | |
4606 | case RTM_NEWADDR: | |
95c385b4 NH |
4607 | /* |
4608 | * If the address was optimistic | |
4609 | * we inserted the route at the start of | |
4610 | * our DAD process, so we don't need | |
4611 | * to do it again | |
4612 | */ | |
4613 | if (!(ifp->rt->rt6i_node)) | |
4614 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4615 | if (ifp->idev->cnf.forwarding) |
4616 | addrconf_join_anycast(ifp); | |
4617 | break; | |
4618 | case RTM_DELADDR: | |
4619 | if (ifp->idev->cnf.forwarding) | |
4620 | addrconf_leave_anycast(ifp); | |
4621 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
d8d1f30b | 4622 | dst_hold(&ifp->rt->dst); |
93fa159a | 4623 | |
73a8bd74 | 4624 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4625 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4626 | break; |
4627 | } | |
63998ac2 | 4628 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
4629 | } |
4630 | ||
4631 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4632 | { | |
8814c4b5 | 4633 | rcu_read_lock_bh(); |
1da177e4 LT |
4634 | if (likely(ifp->idev->dead == 0)) |
4635 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4636 | rcu_read_unlock_bh(); |
1da177e4 LT |
4637 | } |
4638 | ||
4639 | #ifdef CONFIG_SYSCTL | |
4640 | ||
4641 | static | |
8d65af78 | 4642 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4643 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4644 | { | |
4645 | int *valp = ctl->data; | |
4646 | int val = *valp; | |
88af182e | 4647 | loff_t pos = *ppos; |
013d97e9 | 4648 | ctl_table lctl; |
1da177e4 LT |
4649 | int ret; |
4650 | ||
013d97e9 FR |
4651 | /* |
4652 | * ctl->data points to idev->cnf.forwarding, we should | |
4653 | * not modify it until we get the rtnl lock. | |
4654 | */ | |
4655 | lctl = *ctl; | |
4656 | lctl.data = &val; | |
4657 | ||
4658 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4659 | |
c8fecf22 | 4660 | if (write) |
b325fddb | 4661 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4662 | if (ret) |
4663 | *ppos = pos; | |
1ab1457c | 4664 | return ret; |
1da177e4 LT |
4665 | } |
4666 | ||
56d417b1 BH |
4667 | static void dev_disable_change(struct inet6_dev *idev) |
4668 | { | |
4669 | if (!idev || !idev->dev) | |
4670 | return; | |
4671 | ||
4672 | if (idev->cnf.disable_ipv6) | |
4673 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4674 | else | |
4675 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4676 | } | |
4677 | ||
4678 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4679 | { | |
4680 | struct net_device *dev; | |
4681 | struct inet6_dev *idev; | |
4682 | ||
c6d14c84 ED |
4683 | rcu_read_lock(); |
4684 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4685 | idev = __in6_dev_get(dev); |
4686 | if (idev) { | |
4687 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4688 | idev->cnf.disable_ipv6 = newf; | |
4689 | if (changed) | |
4690 | dev_disable_change(idev); | |
4691 | } | |
56d417b1 | 4692 | } |
c6d14c84 | 4693 | rcu_read_unlock(); |
56d417b1 BH |
4694 | } |
4695 | ||
013d97e9 | 4696 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4697 | { |
4698 | struct net *net; | |
013d97e9 FR |
4699 | int old; |
4700 | ||
4701 | if (!rtnl_trylock()) | |
4702 | return restart_syscall(); | |
56d417b1 BH |
4703 | |
4704 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4705 | old = *p; |
4706 | *p = newf; | |
56d417b1 | 4707 | |
013d97e9 FR |
4708 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4709 | rtnl_unlock(); | |
56d417b1 | 4710 | return 0; |
88af182e | 4711 | } |
56d417b1 BH |
4712 | |
4713 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4714 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4715 | addrconf_disable_change(net, newf); | |
013d97e9 | 4716 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4717 | dev_disable_change((struct inet6_dev *)table->extra1); |
4718 | ||
4719 | rtnl_unlock(); | |
4720 | return 0; | |
4721 | } | |
4722 | ||
4723 | static | |
8d65af78 | 4724 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4725 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4726 | { | |
4727 | int *valp = ctl->data; | |
4728 | int val = *valp; | |
88af182e | 4729 | loff_t pos = *ppos; |
013d97e9 | 4730 | ctl_table lctl; |
56d417b1 BH |
4731 | int ret; |
4732 | ||
013d97e9 FR |
4733 | /* |
4734 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4735 | * not modify it until we get the rtnl lock. | |
4736 | */ | |
4737 | lctl = *ctl; | |
4738 | lctl.data = &val; | |
4739 | ||
4740 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4741 | |
4742 | if (write) | |
4743 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4744 | if (ret) |
4745 | *ppos = pos; | |
56d417b1 BH |
4746 | return ret; |
4747 | } | |
4748 | ||
1da177e4 LT |
4749 | static struct addrconf_sysctl_table |
4750 | { | |
4751 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4752 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4753 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4754 | .sysctl_header = NULL, |
4755 | .addrconf_vars = { | |
1ab1457c | 4756 | { |
e21e8467 SH |
4757 | .procname = "forwarding", |
4758 | .data = &ipv6_devconf.forwarding, | |
4759 | .maxlen = sizeof(int), | |
4760 | .mode = 0644, | |
4761 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4762 | }, |
4763 | { | |
e21e8467 SH |
4764 | .procname = "hop_limit", |
4765 | .data = &ipv6_devconf.hop_limit, | |
4766 | .maxlen = sizeof(int), | |
4767 | .mode = 0644, | |
4768 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4769 | }, |
4770 | { | |
e21e8467 SH |
4771 | .procname = "mtu", |
4772 | .data = &ipv6_devconf.mtu6, | |
4773 | .maxlen = sizeof(int), | |
4774 | .mode = 0644, | |
4775 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4776 | }, |
4777 | { | |
e21e8467 SH |
4778 | .procname = "accept_ra", |
4779 | .data = &ipv6_devconf.accept_ra, | |
4780 | .maxlen = sizeof(int), | |
4781 | .mode = 0644, | |
4782 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4783 | }, |
4784 | { | |
e21e8467 SH |
4785 | .procname = "accept_redirects", |
4786 | .data = &ipv6_devconf.accept_redirects, | |
4787 | .maxlen = sizeof(int), | |
4788 | .mode = 0644, | |
4789 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4790 | }, |
4791 | { | |
e21e8467 SH |
4792 | .procname = "autoconf", |
4793 | .data = &ipv6_devconf.autoconf, | |
4794 | .maxlen = sizeof(int), | |
4795 | .mode = 0644, | |
4796 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4797 | }, |
4798 | { | |
e21e8467 SH |
4799 | .procname = "dad_transmits", |
4800 | .data = &ipv6_devconf.dad_transmits, | |
4801 | .maxlen = sizeof(int), | |
4802 | .mode = 0644, | |
4803 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4804 | }, |
4805 | { | |
e21e8467 SH |
4806 | .procname = "router_solicitations", |
4807 | .data = &ipv6_devconf.rtr_solicits, | |
4808 | .maxlen = sizeof(int), | |
4809 | .mode = 0644, | |
4810 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4811 | }, |
4812 | { | |
e21e8467 SH |
4813 | .procname = "router_solicitation_interval", |
4814 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4815 | .maxlen = sizeof(int), | |
4816 | .mode = 0644, | |
4817 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4818 | }, |
4819 | { | |
e21e8467 SH |
4820 | .procname = "router_solicitation_delay", |
4821 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4822 | .maxlen = sizeof(int), | |
4823 | .mode = 0644, | |
4824 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4825 | }, |
4826 | { | |
e21e8467 SH |
4827 | .procname = "force_mld_version", |
4828 | .data = &ipv6_devconf.force_mld_version, | |
4829 | .maxlen = sizeof(int), | |
4830 | .mode = 0644, | |
4831 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4832 | }, |
4833 | #ifdef CONFIG_IPV6_PRIVACY | |
4834 | { | |
e21e8467 SH |
4835 | .procname = "use_tempaddr", |
4836 | .data = &ipv6_devconf.use_tempaddr, | |
4837 | .maxlen = sizeof(int), | |
4838 | .mode = 0644, | |
4839 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4840 | }, |
4841 | { | |
e21e8467 SH |
4842 | .procname = "temp_valid_lft", |
4843 | .data = &ipv6_devconf.temp_valid_lft, | |
4844 | .maxlen = sizeof(int), | |
4845 | .mode = 0644, | |
4846 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4847 | }, |
4848 | { | |
e21e8467 SH |
4849 | .procname = "temp_prefered_lft", |
4850 | .data = &ipv6_devconf.temp_prefered_lft, | |
4851 | .maxlen = sizeof(int), | |
4852 | .mode = 0644, | |
4853 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4854 | }, |
4855 | { | |
e21e8467 SH |
4856 | .procname = "regen_max_retry", |
4857 | .data = &ipv6_devconf.regen_max_retry, | |
4858 | .maxlen = sizeof(int), | |
4859 | .mode = 0644, | |
4860 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4861 | }, |
4862 | { | |
e21e8467 SH |
4863 | .procname = "max_desync_factor", |
4864 | .data = &ipv6_devconf.max_desync_factor, | |
4865 | .maxlen = sizeof(int), | |
4866 | .mode = 0644, | |
4867 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4868 | }, |
4869 | #endif | |
4870 | { | |
e21e8467 SH |
4871 | .procname = "max_addresses", |
4872 | .data = &ipv6_devconf.max_addresses, | |
4873 | .maxlen = sizeof(int), | |
4874 | .mode = 0644, | |
4875 | .proc_handler = proc_dointvec, | |
1da177e4 | 4876 | }, |
65f5c7c1 | 4877 | { |
e21e8467 SH |
4878 | .procname = "accept_ra_defrtr", |
4879 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4880 | .maxlen = sizeof(int), | |
4881 | .mode = 0644, | |
4882 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4883 | }, |
c4fd30eb | 4884 | { |
e21e8467 SH |
4885 | .procname = "accept_ra_pinfo", |
4886 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4887 | .maxlen = sizeof(int), | |
4888 | .mode = 0644, | |
4889 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4890 | }, |
930d6ff2 YH |
4891 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4892 | { | |
e21e8467 SH |
4893 | .procname = "accept_ra_rtr_pref", |
4894 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4895 | .maxlen = sizeof(int), | |
4896 | .mode = 0644, | |
4897 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4898 | }, |
52e16356 | 4899 | { |
e21e8467 SH |
4900 | .procname = "router_probe_interval", |
4901 | .data = &ipv6_devconf.rtr_probe_interval, | |
4902 | .maxlen = sizeof(int), | |
4903 | .mode = 0644, | |
4904 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4905 | }, |
fa03ef38 | 4906 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4907 | { |
e21e8467 SH |
4908 | .procname = "accept_ra_rt_info_max_plen", |
4909 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4910 | .maxlen = sizeof(int), | |
4911 | .mode = 0644, | |
4912 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4913 | }, |
4914 | #endif | |
930d6ff2 | 4915 | #endif |
fbea49e1 | 4916 | { |
e21e8467 SH |
4917 | .procname = "proxy_ndp", |
4918 | .data = &ipv6_devconf.proxy_ndp, | |
4919 | .maxlen = sizeof(int), | |
4920 | .mode = 0644, | |
4921 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4922 | }, |
0bcbc926 | 4923 | { |
e21e8467 SH |
4924 | .procname = "accept_source_route", |
4925 | .data = &ipv6_devconf.accept_source_route, | |
4926 | .maxlen = sizeof(int), | |
4927 | .mode = 0644, | |
4928 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4929 | }, |
95c385b4 NH |
4930 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4931 | { | |
e21e8467 SH |
4932 | .procname = "optimistic_dad", |
4933 | .data = &ipv6_devconf.optimistic_dad, | |
4934 | .maxlen = sizeof(int), | |
4935 | .mode = 0644, | |
4936 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4937 | |
4938 | }, | |
7bc570c8 YH |
4939 | #endif |
4940 | #ifdef CONFIG_IPV6_MROUTE | |
4941 | { | |
e21e8467 SH |
4942 | .procname = "mc_forwarding", |
4943 | .data = &ipv6_devconf.mc_forwarding, | |
4944 | .maxlen = sizeof(int), | |
4945 | .mode = 0444, | |
4946 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4947 | }, |
95c385b4 | 4948 | #endif |
778d80be | 4949 | { |
e21e8467 SH |
4950 | .procname = "disable_ipv6", |
4951 | .data = &ipv6_devconf.disable_ipv6, | |
4952 | .maxlen = sizeof(int), | |
4953 | .mode = 0644, | |
4954 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4955 | }, |
1b34be74 | 4956 | { |
e21e8467 SH |
4957 | .procname = "accept_dad", |
4958 | .data = &ipv6_devconf.accept_dad, | |
4959 | .maxlen = sizeof(int), | |
4960 | .mode = 0644, | |
4961 | .proc_handler = proc_dointvec, | |
1b34be74 | 4962 | }, |
f7734fdf | 4963 | { |
f7734fdf OP |
4964 | .procname = "force_tllao", |
4965 | .data = &ipv6_devconf.force_tllao, | |
4966 | .maxlen = sizeof(int), | |
4967 | .mode = 0644, | |
4968 | .proc_handler = proc_dointvec | |
4969 | }, | |
5cb04436 HFS |
4970 | { |
4971 | .procname = "ndisc_notify", | |
4972 | .data = &ipv6_devconf.ndisc_notify, | |
4973 | .maxlen = sizeof(int), | |
4974 | .mode = 0644, | |
4975 | .proc_handler = proc_dointvec | |
4976 | }, | |
1da177e4 | 4977 | { |
f8572d8f | 4978 | /* sentinel */ |
1da177e4 LT |
4979 | } |
4980 | }, | |
1da177e4 LT |
4981 | }; |
4982 | ||
bff16c2f | 4983 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4984 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4985 | { |
4986 | int i; | |
1da177e4 | 4987 | struct addrconf_sysctl_table *t; |
6105e293 | 4988 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 4989 | |
af879cc7 | 4990 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4991 | if (t == NULL) |
f68635e6 PE |
4992 | goto out; |
4993 | ||
bcdd553f | 4994 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4995 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4996 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4997 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4998 | } |
1da177e4 | 4999 | |
6105e293 | 5000 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5001 | |
6105e293 | 5002 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 5003 | if (t->sysctl_header == NULL) |
6105e293 | 5004 | goto free; |
f68635e6 PE |
5005 | |
5006 | p->sysctl = t; | |
95897312 | 5007 | return 0; |
1da177e4 | 5008 | |
f68635e6 | 5009 | free: |
1da177e4 | 5010 | kfree(t); |
f68635e6 | 5011 | out: |
95897312 | 5012 | return -ENOBUFS; |
1da177e4 LT |
5013 | } |
5014 | ||
408c4768 PE |
5015 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5016 | { | |
5017 | struct addrconf_sysctl_table *t; | |
5018 | ||
5019 | if (p->sysctl == NULL) | |
5020 | return; | |
5021 | ||
5022 | t = p->sysctl; | |
5023 | p->sysctl = NULL; | |
ff538818 | 5024 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5025 | kfree(t); |
5026 | } | |
5027 | ||
f52295a9 PE |
5028 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
5029 | { | |
54716e3b | 5030 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 5031 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 5032 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 5033 | idev, &idev->cnf); |
f52295a9 PE |
5034 | } |
5035 | ||
408c4768 | 5036 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5037 | { |
408c4768 PE |
5038 | __addrconf_sysctl_unregister(&idev->cnf); |
5039 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5040 | } |
5041 | ||
5042 | ||
5043 | #endif | |
5044 | ||
2c8c1e72 | 5045 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5046 | { |
a79ca223 | 5047 | int err = -ENOMEM; |
e0da5a48 PE |
5048 | struct ipv6_devconf *all, *dflt; |
5049 | ||
a79ca223 HZ |
5050 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
5051 | if (all == NULL) | |
5052 | goto err_alloc_all; | |
e0da5a48 | 5053 | |
a79ca223 HZ |
5054 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
5055 | if (dflt == NULL) | |
5056 | goto err_alloc_dflt; | |
e0da5a48 | 5057 | |
a79ca223 HZ |
5058 | /* these will be inherited by all namespaces */ |
5059 | dflt->autoconf = ipv6_defaults.autoconf; | |
5060 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
5061 | |
5062 | net->ipv6.devconf_all = all; | |
5063 | net->ipv6.devconf_dflt = dflt; | |
5064 | ||
5065 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5066 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5067 | if (err < 0) |
5068 | goto err_reg_all; | |
5069 | ||
f8572d8f | 5070 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5071 | if (err < 0) |
5072 | goto err_reg_dflt; | |
5073 | #endif | |
5074 | return 0; | |
5075 | ||
5076 | #ifdef CONFIG_SYSCTL | |
5077 | err_reg_dflt: | |
5078 | __addrconf_sysctl_unregister(all); | |
5079 | err_reg_all: | |
5080 | kfree(dflt); | |
5081 | #endif | |
5082 | err_alloc_dflt: | |
5083 | kfree(all); | |
5084 | err_alloc_all: | |
5085 | return err; | |
5086 | } | |
5087 | ||
2c8c1e72 | 5088 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5089 | { |
5090 | #ifdef CONFIG_SYSCTL | |
5091 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5092 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5093 | #endif | |
09ad9bc7 | 5094 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
5095 | kfree(net->ipv6.devconf_dflt); |
5096 | kfree(net->ipv6.devconf_all); | |
5097 | } | |
5098 | } | |
5099 | ||
5100 | static struct pernet_operations addrconf_ops = { | |
5101 | .init = addrconf_init_net, | |
5102 | .exit = addrconf_exit_net, | |
5103 | }; | |
5104 | ||
b382b191 TG |
5105 | static struct rtnl_af_ops inet6_ops = { |
5106 | .family = AF_INET6, | |
5107 | .fill_link_af = inet6_fill_link_af, | |
5108 | .get_link_af_size = inet6_get_link_af_size, | |
f53adae4 | 5109 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5110 | }; |
5111 | ||
1da177e4 LT |
5112 | /* |
5113 | * Init / cleanup code | |
5114 | */ | |
5115 | ||
5116 | int __init addrconf_init(void) | |
5117 | { | |
c2e21293 | 5118 | int i, err; |
2a8cc6c8 | 5119 | |
e21e8467 SH |
5120 | err = ipv6_addr_label_init(); |
5121 | if (err < 0) { | |
f3213831 JP |
5122 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5123 | __func__, err); | |
2cc6d2bf | 5124 | goto out; |
2a8cc6c8 | 5125 | } |
1da177e4 | 5126 | |
2cc6d2bf NH |
5127 | err = register_pernet_subsys(&addrconf_ops); |
5128 | if (err < 0) | |
5129 | goto out_addrlabel; | |
e0da5a48 | 5130 | |
1da177e4 LT |
5131 | /* The addrconf netdev notifier requires that loopback_dev |
5132 | * has it's ipv6 private information allocated and setup | |
5133 | * before it can bring up and give link-local addresses | |
5134 | * to other devices which are up. | |
5135 | * | |
5136 | * Unfortunately, loopback_dev is not necessarily the first | |
5137 | * entry in the global dev_base list of net devices. In fact, | |
5138 | * it is likely to be the very last entry on that list. | |
5139 | * So this causes the notifier registry below to try and | |
5140 | * give link-local addresses to all devices besides loopback_dev | |
5141 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5142 | * devices to fail to get a link-local address. | |
5143 | * | |
5144 | * So, as a temporary fix, allocate the ipv6 structure for | |
5145 | * loopback_dev first by hand. | |
5146 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5147 | * device and it being up should be removed. | |
5148 | */ | |
5149 | rtnl_lock(); | |
2774c7ab | 5150 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
5151 | err = -ENOMEM; |
5152 | rtnl_unlock(); | |
5153 | if (err) | |
e0da5a48 | 5154 | goto errlo; |
1da177e4 | 5155 | |
c2e21293 | 5156 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5157 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5158 | ||
1da177e4 LT |
5159 | register_netdevice_notifier(&ipv6_dev_notf); |
5160 | ||
1da177e4 | 5161 | addrconf_verify(0); |
c127ea2c | 5162 | |
b382b191 TG |
5163 | err = rtnl_af_register(&inet6_ops); |
5164 | if (err < 0) | |
5165 | goto errout_af; | |
5166 | ||
c7ac8679 GR |
5167 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5168 | NULL); | |
c127ea2c TG |
5169 | if (err < 0) |
5170 | goto errout; | |
5171 | ||
5172 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5173 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5174 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5175 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5176 | inet6_dump_ifaddr, NULL); | |
5177 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5178 | inet6_dump_ifmcaddr, NULL); | |
5179 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5180 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5181 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5182 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5183 | |
2a8cc6c8 YH |
5184 | ipv6_addr_label_rtnl_register(); |
5185 | ||
1da177e4 | 5186 | return 0; |
c127ea2c | 5187 | errout: |
b382b191 TG |
5188 | rtnl_af_unregister(&inet6_ops); |
5189 | errout_af: | |
c127ea2c | 5190 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 PE |
5191 | errlo: |
5192 | unregister_pernet_subsys(&addrconf_ops); | |
2cc6d2bf NH |
5193 | out_addrlabel: |
5194 | ipv6_addr_label_cleanup(); | |
5195 | out: | |
c127ea2c | 5196 | return err; |
1da177e4 LT |
5197 | } |
5198 | ||
09f7709f | 5199 | void addrconf_cleanup(void) |
1da177e4 | 5200 | { |
176c39af | 5201 | struct net_device *dev; |
1da177e4 LT |
5202 | int i; |
5203 | ||
5204 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5205 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5206 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5207 | |
5208 | rtnl_lock(); | |
5209 | ||
b382b191 TG |
5210 | __rtnl_af_unregister(&inet6_ops); |
5211 | ||
176c39af DL |
5212 | /* clean dev list */ |
5213 | for_each_netdev(&init_net, dev) { | |
5214 | if (__in6_dev_get(dev) == NULL) | |
5215 | continue; | |
5216 | addrconf_ifdown(dev, 1); | |
5217 | } | |
5218 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5219 | ||
1da177e4 LT |
5220 | /* |
5221 | * Check hash table. | |
5222 | */ | |
5c578aed | 5223 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5224 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5225 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5226 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
5227 | |
5228 | del_timer(&addr_chk_timer); | |
1da177e4 | 5229 | rtnl_unlock(); |
1da177e4 | 5230 | } |