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Commit | Line | Data |
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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 | |
ba3542e1 | 102 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 103 | #else |
ba3542e1 | 104 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
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, | |
fc4eba58 HFS |
180 | .mldv1_unsolicited_report_interval = 10 * HZ, |
181 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
182 | .dad_transmits = 1, |
183 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
184 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
185 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
186 | #ifdef CONFIG_IPV6_PRIVACY | |
187 | .use_tempaddr = 0, | |
188 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
189 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
190 | .regen_max_retry = REGEN_MAX_RETRY, | |
191 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
192 | #endif | |
193 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 194 | .accept_ra_defrtr = 1, |
c4fd30eb | 195 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
196 | #ifdef CONFIG_IPV6_ROUTER_PREF |
197 | .accept_ra_rtr_pref = 1, | |
52e16356 | 198 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
199 | #ifdef CONFIG_IPV6_ROUTE_INFO |
200 | .accept_ra_rt_info_max_plen = 0, | |
201 | #endif | |
930d6ff2 | 202 | #endif |
fbea49e1 | 203 | .proxy_ndp = 0, |
0bcbc926 | 204 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 205 | .disable_ipv6 = 0, |
1b34be74 | 206 | .accept_dad = 1, |
1da177e4 LT |
207 | }; |
208 | ||
ab32ea5d | 209 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
210 | .forwarding = 0, |
211 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
212 | .mtu6 = IPV6_MIN_MTU, | |
213 | .accept_ra = 1, | |
214 | .accept_redirects = 1, | |
215 | .autoconf = 1, | |
fc4eba58 HFS |
216 | .force_mld_version = 0, |
217 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
218 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
219 | .dad_transmits = 1, |
220 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
221 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
222 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
223 | #ifdef CONFIG_IPV6_PRIVACY | |
224 | .use_tempaddr = 0, | |
225 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
226 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
227 | .regen_max_retry = REGEN_MAX_RETRY, | |
228 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
229 | #endif | |
230 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 231 | .accept_ra_defrtr = 1, |
c4fd30eb | 232 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
233 | #ifdef CONFIG_IPV6_ROUTER_PREF |
234 | .accept_ra_rtr_pref = 1, | |
52e16356 | 235 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
236 | #ifdef CONFIG_IPV6_ROUTE_INFO |
237 | .accept_ra_rt_info_max_plen = 0, | |
238 | #endif | |
930d6ff2 | 239 | #endif |
fbea49e1 | 240 | .proxy_ndp = 0, |
0bcbc926 | 241 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 242 | .disable_ipv6 = 0, |
1b34be74 | 243 | .accept_dad = 1, |
1da177e4 LT |
244 | }; |
245 | ||
246 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 247 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 248 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
249 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
250 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
2c5e8933 HFS |
251 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; |
252 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; | |
253 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; | |
1da177e4 | 254 | |
f24e3d65 | 255 | /* Check if a valid qdisc is available */ |
05297949 | 256 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 257 | { |
05297949 | 258 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
259 | } |
260 | ||
b7b1bfce | 261 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 262 | { |
b7b1bfce HFS |
263 | if (del_timer(&idev->rs_timer)) |
264 | __in6_dev_put(idev); | |
265 | } | |
266 | ||
267 | static void addrconf_del_dad_timer(struct inet6_ifaddr *ifp) | |
268 | { | |
269 | if (del_timer(&ifp->dad_timer)) | |
1da177e4 LT |
270 | __in6_ifa_put(ifp); |
271 | } | |
272 | ||
b7b1bfce HFS |
273 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
274 | unsigned long when) | |
275 | { | |
276 | if (!timer_pending(&idev->rs_timer)) | |
277 | in6_dev_hold(idev); | |
278 | mod_timer(&idev->rs_timer, jiffies + when); | |
279 | } | |
1da177e4 | 280 | |
b7b1bfce HFS |
281 | static void addrconf_mod_dad_timer(struct inet6_ifaddr *ifp, |
282 | unsigned long when) | |
1da177e4 | 283 | { |
b7b1bfce | 284 | if (!timer_pending(&ifp->dad_timer)) |
1da177e4 | 285 | in6_ifa_hold(ifp); |
b7b1bfce | 286 | mod_timer(&ifp->dad_timer, jiffies + when); |
1da177e4 LT |
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 | 328 | WARN_ON(idev->mc_list != NULL); |
b7b1bfce | 329 | WARN_ON(timer_pending(&idev->rs_timer)); |
547b792c | 330 | |
1da177e4 | 331 | #ifdef NET_REFCNT_DEBUG |
91df42be | 332 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); |
1da177e4 LT |
333 | #endif |
334 | dev_put(dev); | |
335 | if (!idev->dead) { | |
f3213831 | 336 | pr_warn("Freeing alive inet6 device %p\n", idev); |
1da177e4 LT |
337 | return; |
338 | } | |
339 | snmp6_free_dev(idev); | |
38f57d1a | 340 | kfree_rcu(idev, rcu); |
1da177e4 | 341 | } |
7159039a YH |
342 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
343 | ||
8e5e8f30 | 344 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
345 | { |
346 | struct inet6_dev *ndev; | |
347 | ||
348 | ASSERT_RTNL(); | |
349 | ||
350 | if (dev->mtu < IPV6_MIN_MTU) | |
351 | return NULL; | |
352 | ||
1ab1457c | 353 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 354 | |
1ab1457c YH |
355 | if (ndev == NULL) |
356 | return NULL; | |
322f74a4 IO |
357 | |
358 | rwlock_init(&ndev->lock); | |
359 | ndev->dev = dev; | |
502a2ffd | 360 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
361 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
362 | (unsigned long)ndev); | |
c346dca1 | 363 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
364 | ndev->cnf.mtu6 = dev->mtu; |
365 | ndev->cnf.sysctl = NULL; | |
366 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
367 | if (ndev->nd_parms == NULL) { | |
368 | kfree(ndev); | |
369 | return NULL; | |
370 | } | |
0187bdfb BH |
371 | if (ndev->cnf.forwarding) |
372 | dev_disable_lro(dev); | |
322f74a4 IO |
373 | /* We refer to the device */ |
374 | dev_hold(dev); | |
1da177e4 | 375 | |
322f74a4 | 376 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 377 | ADBG(KERN_WARNING |
f3213831 | 378 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 379 | __func__, dev->name); |
322f74a4 | 380 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
381 | dev_put(dev); |
382 | kfree(ndev); | |
322f74a4 IO |
383 | return NULL; |
384 | } | |
1da177e4 | 385 | |
322f74a4 | 386 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 387 | ADBG(KERN_WARNING |
f3213831 | 388 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 389 | __func__, dev->name); |
322f74a4 IO |
390 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
391 | ndev->dead = 1; | |
392 | in6_dev_finish_destroy(ndev); | |
393 | return NULL; | |
394 | } | |
395 | ||
396 | /* One reference from device. We must do this before | |
397 | * we invoke __ipv6_regen_rndid(). | |
398 | */ | |
399 | in6_dev_hold(ndev); | |
1da177e4 | 400 | |
1b34be74 YH |
401 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
402 | ndev->cnf.accept_dad = -1; | |
403 | ||
07a93626 | 404 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 405 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 406 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
407 | ndev->cnf.rtr_solicits = 0; |
408 | } | |
409 | #endif | |
410 | ||
1da177e4 | 411 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 412 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 413 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
414 | if ((dev->flags&IFF_LOOPBACK) || |
415 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 416 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 417 | dev->type == ARPHRD_SIT || |
0be669bb | 418 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
419 | ndev->cnf.use_tempaddr = -1; |
420 | } else { | |
421 | in6_dev_hold(ndev); | |
422 | ipv6_regen_rndid((unsigned long) ndev); | |
423 | } | |
1da177e4 | 424 | #endif |
914faa14 | 425 | ndev->token = in6addr_any; |
1da177e4 | 426 | |
f24e3d65 | 427 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
428 | ndev->if_flags |= IF_READY; |
429 | ||
322f74a4 IO |
430 | ipv6_mc_init_dev(ndev); |
431 | ndev->tstamp = jiffies; | |
f52295a9 | 432 | addrconf_sysctl_register(ndev); |
30c4cf57 | 433 | /* protected by rtnl_lock */ |
cf778b00 | 434 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 435 | |
2c5e8933 HFS |
436 | /* Join interface-local all-node multicast group */ |
437 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
438 | ||
d88ae4cc | 439 | /* Join all-node multicast group */ |
f3ee4010 | 440 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 441 | |
d6ddef9e | 442 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 443 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
444 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
445 | ||
1da177e4 LT |
446 | return ndev; |
447 | } | |
448 | ||
8e5e8f30 | 449 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
450 | { |
451 | struct inet6_dev *idev; | |
452 | ||
453 | ASSERT_RTNL(); | |
454 | ||
e21e8467 SH |
455 | idev = __in6_dev_get(dev); |
456 | if (!idev) { | |
457 | idev = ipv6_add_dev(dev); | |
458 | if (!idev) | |
1da177e4 LT |
459 | return NULL; |
460 | } | |
c5e33bdd | 461 | |
1da177e4 LT |
462 | if (dev->flags&IFF_UP) |
463 | ipv6_mc_up(idev); | |
464 | return idev; | |
465 | } | |
466 | ||
f3a1bfb1 ND |
467 | static int inet6_netconf_msgsize_devconf(int type) |
468 | { | |
469 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
470 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
471 | ||
76f8f6cb ND |
472 | /* type -1 is used for ALL */ |
473 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 474 | size += nla_total_size(4); |
b1afce95 | 475 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
476 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
477 | size += nla_total_size(4); | |
b1afce95 | 478 | #endif |
f3a1bfb1 ND |
479 | |
480 | return size; | |
481 | } | |
482 | ||
483 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
484 | struct ipv6_devconf *devconf, u32 portid, | |
485 | u32 seq, int event, unsigned int flags, | |
486 | int type) | |
487 | { | |
488 | struct nlmsghdr *nlh; | |
489 | struct netconfmsg *ncm; | |
490 | ||
491 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
492 | flags); | |
493 | if (nlh == NULL) | |
494 | return -EMSGSIZE; | |
495 | ||
496 | ncm = nlmsg_data(nlh); | |
497 | ncm->ncm_family = AF_INET6; | |
498 | ||
499 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
500 | goto nla_put_failure; | |
501 | ||
76f8f6cb ND |
502 | /* type -1 is used for ALL */ |
503 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
504 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
505 | goto nla_put_failure; | |
b1afce95 | 506 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
507 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
508 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
509 | devconf->mc_forwarding) < 0) | |
510 | goto nla_put_failure; | |
b1afce95 | 511 | #endif |
f3a1bfb1 ND |
512 | return nlmsg_end(skb, nlh); |
513 | ||
514 | nla_put_failure: | |
515 | nlmsg_cancel(skb, nlh); | |
516 | return -EMSGSIZE; | |
517 | } | |
518 | ||
d67b8c61 ND |
519 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
520 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
521 | { |
522 | struct sk_buff *skb; | |
523 | int err = -ENOBUFS; | |
524 | ||
525 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
526 | if (skb == NULL) | |
527 | goto errout; | |
528 | ||
529 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
530 | RTM_NEWNETCONF, 0, type); | |
531 | if (err < 0) { | |
532 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
533 | WARN_ON(err == -EMSGSIZE); | |
534 | kfree_skb(skb); | |
535 | goto errout; | |
536 | } | |
537 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
538 | return; | |
539 | errout: | |
bd779028 | 540 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
541 | } |
542 | ||
76f8f6cb ND |
543 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
544 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
545 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
546 | }; | |
547 | ||
548 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 549 | struct nlmsghdr *nlh) |
76f8f6cb ND |
550 | { |
551 | struct net *net = sock_net(in_skb->sk); | |
552 | struct nlattr *tb[NETCONFA_MAX+1]; | |
553 | struct netconfmsg *ncm; | |
554 | struct sk_buff *skb; | |
555 | struct ipv6_devconf *devconf; | |
556 | struct inet6_dev *in6_dev; | |
557 | struct net_device *dev; | |
558 | int ifindex; | |
559 | int err; | |
560 | ||
561 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
562 | devconf_ipv6_policy); | |
563 | if (err < 0) | |
564 | goto errout; | |
565 | ||
566 | err = EINVAL; | |
567 | if (!tb[NETCONFA_IFINDEX]) | |
568 | goto errout; | |
569 | ||
570 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
571 | switch (ifindex) { | |
572 | case NETCONFA_IFINDEX_ALL: | |
573 | devconf = net->ipv6.devconf_all; | |
574 | break; | |
575 | case NETCONFA_IFINDEX_DEFAULT: | |
576 | devconf = net->ipv6.devconf_dflt; | |
577 | break; | |
578 | default: | |
579 | dev = __dev_get_by_index(net, ifindex); | |
580 | if (dev == NULL) | |
581 | goto errout; | |
582 | in6_dev = __in6_dev_get(dev); | |
583 | if (in6_dev == NULL) | |
584 | goto errout; | |
585 | devconf = &in6_dev->cnf; | |
586 | break; | |
587 | } | |
588 | ||
589 | err = -ENOBUFS; | |
590 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
591 | if (skb == NULL) | |
592 | goto errout; | |
593 | ||
594 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
595 | NETLINK_CB(in_skb).portid, | |
596 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
597 | -1); | |
598 | if (err < 0) { | |
599 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
600 | WARN_ON(err == -EMSGSIZE); | |
601 | kfree_skb(skb); | |
602 | goto errout; | |
603 | } | |
604 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
605 | errout: | |
606 | return err; | |
607 | } | |
608 | ||
7a674200 ND |
609 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
610 | struct netlink_callback *cb) | |
611 | { | |
612 | struct net *net = sock_net(skb->sk); | |
613 | int h, s_h; | |
614 | int idx, s_idx; | |
615 | struct net_device *dev; | |
616 | struct inet6_dev *idev; | |
617 | struct hlist_head *head; | |
618 | ||
619 | s_h = cb->args[0]; | |
620 | s_idx = idx = cb->args[1]; | |
621 | ||
622 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
623 | idx = 0; | |
624 | head = &net->dev_index_head[h]; | |
625 | rcu_read_lock(); | |
63998ac2 ND |
626 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
627 | net->dev_base_seq; | |
7a674200 ND |
628 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
629 | if (idx < s_idx) | |
630 | goto cont; | |
631 | idev = __in6_dev_get(dev); | |
632 | if (!idev) | |
633 | goto cont; | |
634 | ||
635 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
636 | &idev->cnf, | |
637 | NETLINK_CB(cb->skb).portid, | |
638 | cb->nlh->nlmsg_seq, | |
639 | RTM_NEWNETCONF, | |
640 | NLM_F_MULTI, | |
641 | -1) <= 0) { | |
642 | rcu_read_unlock(); | |
643 | goto done; | |
644 | } | |
63998ac2 | 645 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
646 | cont: |
647 | idx++; | |
648 | } | |
649 | rcu_read_unlock(); | |
650 | } | |
651 | if (h == NETDEV_HASHENTRIES) { | |
652 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
653 | net->ipv6.devconf_all, | |
654 | NETLINK_CB(cb->skb).portid, | |
655 | cb->nlh->nlmsg_seq, | |
656 | RTM_NEWNETCONF, NLM_F_MULTI, | |
657 | -1) <= 0) | |
658 | goto done; | |
659 | else | |
660 | h++; | |
661 | } | |
662 | if (h == NETDEV_HASHENTRIES + 1) { | |
663 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
664 | net->ipv6.devconf_dflt, | |
665 | NETLINK_CB(cb->skb).portid, | |
666 | cb->nlh->nlmsg_seq, | |
667 | RTM_NEWNETCONF, NLM_F_MULTI, | |
668 | -1) <= 0) | |
669 | goto done; | |
670 | else | |
671 | h++; | |
672 | } | |
673 | done: | |
674 | cb->args[0] = h; | |
675 | cb->args[1] = idx; | |
676 | ||
677 | return skb->len; | |
678 | } | |
679 | ||
1da177e4 LT |
680 | #ifdef CONFIG_SYSCTL |
681 | static void dev_forward_change(struct inet6_dev *idev) | |
682 | { | |
683 | struct net_device *dev; | |
684 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
685 | |
686 | if (!idev) | |
687 | return; | |
688 | dev = idev->dev; | |
0187bdfb BH |
689 | if (idev->cnf.forwarding) |
690 | dev_disable_lro(dev); | |
1a940835 | 691 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 692 | if (idev->cnf.forwarding) { |
f3ee4010 | 693 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
694 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
695 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
696 | } else { | |
f3ee4010 | 697 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
698 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
699 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
700 | } | |
1da177e4 | 701 | } |
502a2ffd | 702 | |
703 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
704 | if (ifa->flags&IFA_F_TENTATIVE) |
705 | continue; | |
1da177e4 LT |
706 | if (idev->cnf.forwarding) |
707 | addrconf_join_anycast(ifa); | |
708 | else | |
709 | addrconf_leave_anycast(ifa); | |
710 | } | |
f3a1bfb1 ND |
711 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
712 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
713 | } |
714 | ||
715 | ||
e186932b | 716 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
717 | { |
718 | struct net_device *dev; | |
719 | struct inet6_dev *idev; | |
720 | ||
4acd4945 | 721 | for_each_netdev(net, dev) { |
1da177e4 LT |
722 | idev = __in6_dev_get(dev); |
723 | if (idev) { | |
e186932b PE |
724 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
725 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
726 | if (changed) |
727 | dev_forward_change(idev); | |
728 | } | |
1da177e4 | 729 | } |
1da177e4 | 730 | } |
c8fecf22 | 731 | |
013d97e9 | 732 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 733 | { |
bff16c2f | 734 | struct net *net; |
013d97e9 FR |
735 | int old; |
736 | ||
737 | if (!rtnl_trylock()) | |
738 | return restart_syscall(); | |
bff16c2f PE |
739 | |
740 | net = (struct net *)table->extra2; | |
013d97e9 FR |
741 | old = *p; |
742 | *p = newf; | |
b325fddb | 743 | |
013d97e9 | 744 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
745 | if ((!newf) ^ (!old)) |
746 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
747 | NETCONFA_IFINDEX_DEFAULT, | |
748 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
749 | rtnl_unlock(); |
750 | return 0; | |
88af182e | 751 | } |
c8fecf22 | 752 | |
e186932b | 753 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
754 | net->ipv6.devconf_dflt->forwarding = newf; |
755 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
756 | if ((!newf) ^ (!old)) |
757 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
758 | NETCONFA_IFINDEX_ALL, | |
759 | net->ipv6.devconf_all); | |
013d97e9 | 760 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 761 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 762 | rtnl_unlock(); |
c8fecf22 | 763 | |
013d97e9 | 764 | if (newf) |
7b4da532 | 765 | rt6_purge_dflt_routers(net); |
b325fddb | 766 | return 1; |
c8fecf22 | 767 | } |
1da177e4 LT |
768 | #endif |
769 | ||
5c578aed | 770 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
771 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
772 | { | |
c2e21293 | 773 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 774 | |
1da177e4 | 775 | #ifdef NET_REFCNT_DEBUG |
91df42be | 776 | pr_debug("%s\n", __func__); |
1da177e4 LT |
777 | #endif |
778 | ||
779 | in6_dev_put(ifp->idev); | |
780 | ||
b7b1bfce | 781 | if (del_timer(&ifp->dad_timer)) |
e21e8467 | 782 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 | 783 | |
e9d3e084 | 784 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 785 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
786 | return; |
787 | } | |
94e187c0 | 788 | ip6_rt_put(ifp->rt); |
1da177e4 | 789 | |
e5785985 | 790 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
791 | } |
792 | ||
e55ffac6 BH |
793 | static void |
794 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
795 | { | |
502a2ffd | 796 | struct list_head *p; |
8a6ce0c0 | 797 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
798 | |
799 | /* | |
800 | * Each device address list is sorted in order of scope - | |
801 | * global before linklocal. | |
802 | */ | |
502a2ffd | 803 | list_for_each(p, &idev->addr_list) { |
804 | struct inet6_ifaddr *ifa | |
805 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 806 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
807 | break; |
808 | } | |
809 | ||
b54c9b98 | 810 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
811 | } |
812 | ||
ddbe5032 | 813 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 814 | { |
ddbe5032 | 815 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
816 | } |
817 | ||
1da177e4 LT |
818 | /* On success it returns ifp with increased reference count */ |
819 | ||
820 | static struct inet6_ifaddr * | |
3f8f5298 JP |
821 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
822 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 823 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
824 | { |
825 | struct inet6_ifaddr *ifa = NULL; | |
826 | struct rt6_info *rt; | |
3a88a81d | 827 | unsigned int hash; |
1da177e4 | 828 | int err = 0; |
d68b8270 YH |
829 | int addr_type = ipv6_addr_type(addr); |
830 | ||
831 | if (addr_type == IPV6_ADDR_ANY || | |
832 | addr_type & IPV6_ADDR_MULTICAST || | |
833 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
834 | addr_type & IPV6_ADDR_LOOPBACK)) | |
835 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 836 | |
8814c4b5 | 837 | rcu_read_lock_bh(); |
1da177e4 LT |
838 | if (idev->dead) { |
839 | err = -ENODEV; /*XXX*/ | |
840 | goto out2; | |
841 | } | |
842 | ||
56d417b1 | 843 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
844 | err = -EACCES; |
845 | goto out2; | |
846 | } | |
847 | ||
5c578aed | 848 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
849 | |
850 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 851 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 852 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
853 | err = -EEXIST; |
854 | goto out; | |
855 | } | |
856 | ||
322f74a4 | 857 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
858 | |
859 | if (ifa == NULL) { | |
ba3542e1 | 860 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
861 | err = -ENOBUFS; |
862 | goto out; | |
863 | } | |
864 | ||
8f031519 | 865 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
866 | if (IS_ERR(rt)) { |
867 | err = PTR_ERR(rt); | |
868 | goto out; | |
869 | } | |
870 | ||
4e3fd7a0 | 871 | ifa->addr = *addr; |
3f8f5298 JP |
872 | if (peer_addr) |
873 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
874 | |
875 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 876 | spin_lock_init(&ifa->state_lock); |
b7b1bfce HFS |
877 | setup_timer(&ifa->dad_timer, addrconf_dad_timer, |
878 | (unsigned long)ifa); | |
c2e21293 | 879 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
880 | ifa->scope = scope; |
881 | ifa->prefix_len = pfxlen; | |
882 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
883 | ifa->valid_lft = valid_lft; |
884 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 885 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 886 | ifa->tokenized = false; |
1da177e4 | 887 | |
57f5f544 KF |
888 | ifa->rt = rt; |
889 | ||
1da177e4 LT |
890 | ifa->idev = idev; |
891 | in6_dev_hold(idev); | |
892 | /* For caller */ | |
893 | in6_ifa_hold(ifa); | |
894 | ||
895 | /* Add to big hash table */ | |
ddbe5032 | 896 | hash = inet6_addr_hash(addr); |
1da177e4 | 897 | |
5c578aed | 898 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 899 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
900 | |
901 | write_lock(&idev->lock); | |
902 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 903 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
904 | |
905 | #ifdef CONFIG_IPV6_PRIVACY | |
906 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 907 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
908 | in6_ifa_hold(ifa); |
909 | } | |
910 | #endif | |
911 | ||
1da177e4 LT |
912 | in6_ifa_hold(ifa); |
913 | write_unlock(&idev->lock); | |
914 | out2: | |
8814c4b5 | 915 | rcu_read_unlock_bh(); |
1da177e4 | 916 | |
fd92833a | 917 | if (likely(err == 0)) |
f88c91dd | 918 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
919 | else { |
920 | kfree(ifa); | |
921 | ifa = ERR_PTR(err); | |
922 | } | |
923 | ||
924 | return ifa; | |
925 | out: | |
5c578aed | 926 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
927 | goto out2; |
928 | } | |
929 | ||
930 | /* This function wants to get referenced ifp and releases it before return */ | |
931 | ||
932 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
933 | { | |
502a2ffd | 934 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 935 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 936 | int state; |
1da177e4 LT |
937 | int deleted = 0, onlink = 0; |
938 | unsigned long expires = jiffies; | |
939 | ||
4c5ff6a6 HX |
940 | spin_lock_bh(&ifp->state_lock); |
941 | state = ifp->state; | |
e9d3e084 | 942 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
943 | spin_unlock_bh(&ifp->state_lock); |
944 | ||
945 | if (state == INET6_IFADDR_STATE_DEAD) | |
946 | goto out; | |
1da177e4 | 947 | |
5c578aed | 948 | spin_lock_bh(&addrconf_hash_lock); |
949 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 950 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
951 | |
952 | write_lock_bh(&idev->lock); | |
953 | #ifdef CONFIG_IPV6_PRIVACY | |
954 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 955 | list_del(&ifp->tmp_list); |
956 | if (ifp->ifpub) { | |
957 | in6_ifa_put(ifp->ifpub); | |
958 | ifp->ifpub = NULL; | |
1da177e4 | 959 | } |
372e6c8f | 960 | __in6_ifa_put(ifp); |
1da177e4 LT |
961 | } |
962 | #endif | |
963 | ||
502a2ffd | 964 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 965 | if (ifa == ifp) { |
502a2ffd | 966 | list_del_init(&ifp->if_list); |
1da177e4 | 967 | __in6_ifa_put(ifp); |
502a2ffd | 968 | |
1da177e4 LT |
969 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
970 | break; | |
971 | deleted = 1; | |
1d142804 | 972 | continue; |
1da177e4 LT |
973 | } else if (ifp->flags & IFA_F_PERMANENT) { |
974 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
975 | ifp->prefix_len)) { | |
976 | if (ifa->flags & IFA_F_PERMANENT) { | |
977 | onlink = 1; | |
978 | if (deleted) | |
979 | break; | |
980 | } else { | |
981 | unsigned long lifetime; | |
982 | ||
983 | if (!onlink) | |
984 | onlink = -1; | |
985 | ||
986 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
987 | |
988 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
989 | /* | |
990 | * Note: Because this address is | |
991 | * not permanent, lifetime < | |
992 | * LONG_MAX / HZ here. | |
993 | */ | |
1da177e4 LT |
994 | if (time_before(expires, |
995 | ifa->tstamp + lifetime * HZ)) | |
996 | expires = ifa->tstamp + lifetime * HZ; | |
997 | spin_unlock(&ifa->lock); | |
998 | } | |
999 | } | |
1000 | } | |
1001 | } | |
1002 | write_unlock_bh(&idev->lock); | |
1003 | ||
b7b1bfce | 1004 | addrconf_del_dad_timer(ifp); |
b2238566 | 1005 | |
1da177e4 LT |
1006 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1007 | ||
f88c91dd | 1008 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1009 | |
1da177e4 LT |
1010 | /* |
1011 | * Purge or update corresponding prefix | |
1012 | * | |
1013 | * 1) we don't purge prefix here if address was not permanent. | |
1014 | * prefix is managed by its own lifetime. | |
1015 | * 2) if there're no addresses, delete prefix. | |
1016 | * 3) if there're still other permanent address(es), | |
1017 | * corresponding prefix is still permanent. | |
1018 | * 4) otherwise, update prefix lifetime to the | |
1019 | * longest valid lifetime among the corresponding | |
1020 | * addresses on the device. | |
1021 | * Note: subsequent RA will update lifetime. | |
1022 | * | |
1023 | * --yoshfuji | |
1024 | */ | |
1025 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
1026 | struct in6_addr prefix; | |
1027 | struct rt6_info *rt; | |
64c6d08e | 1028 | |
1da177e4 | 1029 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
1da177e4 | 1030 | |
21caa662 RK |
1031 | rt = addrconf_get_prefix_route(&prefix, |
1032 | ifp->prefix_len, | |
1033 | ifp->idev->dev, | |
1034 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1035 | ||
1036 | if (rt) { | |
1da177e4 | 1037 | if (onlink == 0) { |
e0a1ad73 | 1038 | ip6_del_rt(rt); |
1da177e4 LT |
1039 | rt = NULL; |
1040 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 1041 | rt6_set_expires(rt, expires); |
1da177e4 LT |
1042 | } |
1043 | } | |
94e187c0 | 1044 | ip6_rt_put(rt); |
1da177e4 LT |
1045 | } |
1046 | ||
c3968a85 DW |
1047 | /* clean up prefsrc entries */ |
1048 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1049 | out: |
1da177e4 LT |
1050 | in6_ifa_put(ifp); |
1051 | } | |
1052 | ||
1053 | #ifdef CONFIG_IPV6_PRIVACY | |
1054 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
1055 | { | |
1056 | struct inet6_dev *idev = ifp->idev; | |
1057 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1058 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1059 | unsigned long regen_advance; |
1da177e4 LT |
1060 | int tmp_plen; |
1061 | int ret = 0; | |
1062 | int max_addresses; | |
95c385b4 | 1063 | u32 addr_flags; |
76f793e3 | 1064 | unsigned long now = jiffies; |
1da177e4 LT |
1065 | |
1066 | write_lock(&idev->lock); | |
1067 | if (ift) { | |
1068 | spin_lock_bh(&ift->lock); | |
1069 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1070 | spin_unlock_bh(&ift->lock); | |
1071 | tmpaddr = &addr; | |
1072 | } else { | |
1073 | tmpaddr = NULL; | |
1074 | } | |
1075 | retry: | |
1076 | in6_dev_hold(idev); | |
1077 | if (idev->cnf.use_tempaddr <= 0) { | |
1078 | write_unlock(&idev->lock); | |
f3213831 | 1079 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1080 | in6_dev_put(idev); |
1081 | ret = -1; | |
1082 | goto out; | |
1083 | } | |
1084 | spin_lock_bh(&ifp->lock); | |
1085 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1086 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1087 | spin_unlock_bh(&ifp->lock); | |
1088 | write_unlock(&idev->lock); | |
f3213831 JP |
1089 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1090 | __func__); | |
1da177e4 LT |
1091 | in6_dev_put(idev); |
1092 | ret = -1; | |
1093 | goto out; | |
1094 | } | |
1095 | in6_ifa_hold(ifp); | |
1096 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1097 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1098 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1099 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1100 | tmp_valid_lft = min_t(__u32, |
1101 | ifp->valid_lft, | |
7a876b0e | 1102 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1103 | tmp_prefered_lft = min_t(__u32, |
1104 | ifp->prefered_lft, | |
7a876b0e | 1105 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1106 | idev->cnf.max_desync_factor); |
1da177e4 LT |
1107 | tmp_plen = ifp->prefix_len; |
1108 | max_addresses = idev->cnf.max_addresses; | |
1da177e4 LT |
1109 | tmp_tstamp = ifp->tstamp; |
1110 | spin_unlock_bh(&ifp->lock); | |
1111 | ||
eac55bf9 | 1112 | regen_advance = idev->cnf.regen_max_retry * |
7eaa48a4 DM |
1113 | idev->cnf.dad_transmits * |
1114 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 1115 | write_unlock(&idev->lock); |
95c385b4 | 1116 | |
eac55bf9 BB |
1117 | /* A temporary address is created only if this calculated Preferred |
1118 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1119 | * an implementation must not create a temporary address with a zero | |
1120 | * Preferred Lifetime. | |
1121 | */ | |
1122 | if (tmp_prefered_lft <= regen_advance) { | |
1123 | in6_ifa_put(ifp); | |
1124 | in6_dev_put(idev); | |
1125 | ret = -1; | |
1126 | goto out; | |
1127 | } | |
1128 | ||
95c385b4 NH |
1129 | addr_flags = IFA_F_TEMPORARY; |
1130 | /* set in addrconf_prefix_rcv() */ | |
1131 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1132 | addr_flags |= IFA_F_OPTIMISTIC; | |
1133 | ||
1da177e4 | 1134 | ift = !max_addresses || |
1ab1457c | 1135 | ipv6_count_addresses(idev) < max_addresses ? |
3f8f5298 | 1136 | ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
8a226b2c JB |
1137 | ipv6_addr_scope(&addr), addr_flags, |
1138 | tmp_valid_lft, tmp_prefered_lft) : NULL; | |
3f0d2ba0 | 1139 | if (IS_ERR_OR_NULL(ift)) { |
1da177e4 LT |
1140 | in6_ifa_put(ifp); |
1141 | in6_dev_put(idev); | |
f3213831 | 1142 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 LT |
1143 | tmpaddr = &addr; |
1144 | write_lock(&idev->lock); | |
1145 | goto retry; | |
1146 | } | |
1147 | ||
1148 | spin_lock_bh(&ift->lock); | |
1149 | ift->ifpub = ifp; | |
76f793e3 | 1150 | ift->cstamp = now; |
1da177e4 LT |
1151 | ift->tstamp = tmp_tstamp; |
1152 | spin_unlock_bh(&ift->lock); | |
1153 | ||
cf22f9a2 | 1154 | addrconf_dad_start(ift); |
1da177e4 LT |
1155 | in6_ifa_put(ift); |
1156 | in6_dev_put(idev); | |
1157 | out: | |
1158 | return ret; | |
1159 | } | |
1160 | #endif | |
1161 | ||
1162 | /* | |
072047e4 | 1163 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1164 | */ |
a9b05723 YH |
1165 | enum { |
1166 | IPV6_SADDR_RULE_INIT = 0, | |
1167 | IPV6_SADDR_RULE_LOCAL, | |
1168 | IPV6_SADDR_RULE_SCOPE, | |
1169 | IPV6_SADDR_RULE_PREFERRED, | |
1170 | #ifdef CONFIG_IPV6_MIP6 | |
1171 | IPV6_SADDR_RULE_HOA, | |
1172 | #endif | |
1173 | IPV6_SADDR_RULE_OIF, | |
1174 | IPV6_SADDR_RULE_LABEL, | |
1175 | #ifdef CONFIG_IPV6_PRIVACY | |
1176 | IPV6_SADDR_RULE_PRIVACY, | |
1177 | #endif | |
1178 | IPV6_SADDR_RULE_ORCHID, | |
1179 | IPV6_SADDR_RULE_PREFIX, | |
1180 | IPV6_SADDR_RULE_MAX | |
1181 | }; | |
1182 | ||
072047e4 | 1183 | struct ipv6_saddr_score { |
a9b05723 YH |
1184 | int rule; |
1185 | int addr_type; | |
1186 | struct inet6_ifaddr *ifa; | |
1187 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1188 | int scopedist; | |
1189 | int matchlen; | |
072047e4 YH |
1190 | }; |
1191 | ||
a9b05723 | 1192 | struct ipv6_saddr_dst { |
9acd9f3a | 1193 | const struct in6_addr *addr; |
a9b05723 YH |
1194 | int ifindex; |
1195 | int scope; | |
1196 | int label; | |
7cbca67c | 1197 | unsigned int prefs; |
a9b05723 | 1198 | }; |
072047e4 | 1199 | |
b6f99a21 | 1200 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1201 | { |
45bb0060 | 1202 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1203 | return 1; |
1204 | return 0; | |
1da177e4 LT |
1205 | } |
1206 | ||
3de23255 BT |
1207 | static int ipv6_get_saddr_eval(struct net *net, |
1208 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1209 | struct ipv6_saddr_dst *dst, |
1210 | int i) | |
1211 | { | |
1212 | int ret; | |
1213 | ||
1214 | if (i <= score->rule) { | |
1215 | switch (i) { | |
1216 | case IPV6_SADDR_RULE_SCOPE: | |
1217 | ret = score->scopedist; | |
1218 | break; | |
1219 | case IPV6_SADDR_RULE_PREFIX: | |
1220 | ret = score->matchlen; | |
1221 | break; | |
1222 | default: | |
1223 | ret = !!test_bit(i, score->scorebits); | |
1224 | } | |
1225 | goto out; | |
1226 | } | |
1227 | ||
1228 | switch (i) { | |
1229 | case IPV6_SADDR_RULE_INIT: | |
1230 | /* Rule 0: remember if hiscore is not ready yet */ | |
1231 | ret = !!score->ifa; | |
1232 | break; | |
1233 | case IPV6_SADDR_RULE_LOCAL: | |
1234 | /* Rule 1: Prefer same address */ | |
1235 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1236 | break; | |
1237 | case IPV6_SADDR_RULE_SCOPE: | |
1238 | /* Rule 2: Prefer appropriate scope | |
1239 | * | |
1240 | * ret | |
1241 | * ^ | |
1242 | * -1 | d 15 | |
1243 | * ---+--+-+---> scope | |
1244 | * | | |
1245 | * | d is scope of the destination. | |
1246 | * B-d | \ | |
1247 | * | \ <- smaller scope is better if | |
1248 | * B-15 | \ if scope is enough for destinaion. | |
1249 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1250 | * d-C-1 | / | |
1251 | * |/ <- greater is better | |
1252 | * -C / if scope is not enough for destination. | |
1253 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1254 | * | |
1255 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1256 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1257 | * Assume B = 0 and we get C > 29. | |
1258 | */ | |
1259 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1260 | if (ret >= dst->scope) | |
1261 | ret = -ret; | |
1262 | else | |
1263 | ret -= 128; /* 30 is enough */ | |
1264 | score->scopedist = ret; | |
1265 | break; | |
1266 | case IPV6_SADDR_RULE_PREFERRED: | |
1267 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1268 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1269 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1270 | break; | |
1271 | #ifdef CONFIG_IPV6_MIP6 | |
1272 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1273 | { |
a9b05723 | 1274 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1275 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1276 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1277 | break; |
7cbca67c | 1278 | } |
a9b05723 YH |
1279 | #endif |
1280 | case IPV6_SADDR_RULE_OIF: | |
1281 | /* Rule 5: Prefer outgoing interface */ | |
1282 | ret = (!dst->ifindex || | |
1283 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1284 | break; | |
1285 | case IPV6_SADDR_RULE_LABEL: | |
1286 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1287 | ret = ipv6_addr_label(net, |
1288 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1289 | score->ifa->idev->dev->ifindex) == dst->label; |
1290 | break; | |
1291 | #ifdef CONFIG_IPV6_PRIVACY | |
1292 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1293 | { |
a9b05723 | 1294 | /* Rule 7: Prefer public address |
25985edc | 1295 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1296 | */ |
7cbca67c YH |
1297 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1298 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1299 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1300 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1301 | break; |
7cbca67c | 1302 | } |
a9b05723 YH |
1303 | #endif |
1304 | case IPV6_SADDR_RULE_ORCHID: | |
1305 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1306 | * non-ORCHID vs non-ORCHID | |
1307 | */ | |
1308 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1309 | ipv6_addr_orchid(dst->addr)); | |
1310 | break; | |
1311 | case IPV6_SADDR_RULE_PREFIX: | |
1312 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1313 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1314 | if (ret > score->ifa->prefix_len) | |
1315 | ret = score->ifa->prefix_len; | |
1316 | score->matchlen = ret; | |
a9b05723 YH |
1317 | break; |
1318 | default: | |
1319 | ret = 0; | |
1320 | } | |
1321 | ||
1322 | if (ret) | |
1323 | __set_bit(i, score->scorebits); | |
1324 | score->rule = i; | |
1325 | out: | |
1326 | return ret; | |
1327 | } | |
1328 | ||
b3f644fc | 1329 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1330 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1331 | struct in6_addr *saddr) |
1da177e4 | 1332 | { |
a9b05723 YH |
1333 | struct ipv6_saddr_score scores[2], |
1334 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1335 | struct ipv6_saddr_dst dst; |
072047e4 | 1336 | struct net_device *dev; |
a9b05723 | 1337 | int dst_type; |
1da177e4 | 1338 | |
a9b05723 YH |
1339 | dst_type = __ipv6_addr_type(daddr); |
1340 | dst.addr = daddr; | |
1341 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1342 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1343 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1344 | dst.prefs = prefs; |
a9b05723 YH |
1345 | |
1346 | hiscore->rule = -1; | |
1347 | hiscore->ifa = NULL; | |
1da177e4 | 1348 | |
8814c4b5 | 1349 | rcu_read_lock(); |
1da177e4 | 1350 | |
c6d14c84 | 1351 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1352 | struct inet6_dev *idev; |
072047e4 | 1353 | |
a9b05723 | 1354 | /* Candidate Source Address (section 4) |
072047e4 YH |
1355 | * - multicast and link-local destination address, |
1356 | * the set of candidate source address MUST only | |
1357 | * include addresses assigned to interfaces | |
1358 | * belonging to the same link as the outgoing | |
1359 | * interface. | |
1360 | * (- For site-local destination addresses, the | |
1361 | * set of candidate source addresses MUST only | |
1362 | * include addresses assigned to interfaces | |
1363 | * belonging to the same site as the outgoing | |
1364 | * interface.) | |
1365 | */ | |
a9b05723 YH |
1366 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1367 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1368 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1369 | continue; |
1da177e4 | 1370 | |
1da177e4 | 1371 | idev = __in6_dev_get(dev); |
072047e4 YH |
1372 | if (!idev) |
1373 | continue; | |
1374 | ||
1375 | read_lock_bh(&idev->lock); | |
502a2ffd | 1376 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1377 | int i; |
072047e4 | 1378 | |
a9b05723 | 1379 | /* |
6b3ae80a YH |
1380 | * - Tentative Address (RFC2462 section 5.4) |
1381 | * - A tentative address is not considered | |
1382 | * "assigned to an interface" in the traditional | |
95c385b4 | 1383 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1384 | * - Candidate Source Address (section 4) |
072047e4 YH |
1385 | * - In any case, anycast addresses, multicast |
1386 | * addresses, and the unspecified address MUST | |
1387 | * NOT be included in a candidate set. | |
1388 | */ | |
a9b05723 YH |
1389 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1390 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1391 | continue; |
a9b05723 YH |
1392 | |
1393 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1394 | ||
1395 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1396 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1397 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1398 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1399 | "assigned as unicast address on %s", |
1400 | dev->name); | |
1401 | continue; | |
1402 | } | |
1403 | ||
a9b05723 YH |
1404 | score->rule = -1; |
1405 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1406 | ||
1407 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1408 | int minihiscore, miniscore; | |
1409 | ||
3de23255 BT |
1410 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1411 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1412 | |
1413 | if (minihiscore > miniscore) { | |
1414 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1415 | score->scopedist > 0) { | |
1416 | /* | |
1417 | * special case: | |
1418 | * each remaining entry | |
1419 | * has too small (not enough) | |
1420 | * scope, because ifa entries | |
1421 | * are sorted by their scope | |
1422 | * values. | |
1423 | */ | |
1424 | goto try_nextdev; | |
1425 | } | |
1426 | break; | |
1427 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1428 | if (hiscore->ifa) |
1429 | in6_ifa_put(hiscore->ifa); | |
1430 | ||
1431 | in6_ifa_hold(score->ifa); | |
1432 | ||
a0bffffc | 1433 | swap(hiscore, score); |
a9b05723 YH |
1434 | |
1435 | /* restore our iterator */ | |
1436 | score->ifa = hiscore->ifa; | |
1437 | ||
1438 | break; | |
1da177e4 | 1439 | } |
072047e4 | 1440 | } |
1da177e4 | 1441 | } |
a9b05723 | 1442 | try_nextdev: |
072047e4 | 1443 | read_unlock_bh(&idev->lock); |
1da177e4 | 1444 | } |
8814c4b5 | 1445 | rcu_read_unlock(); |
1da177e4 | 1446 | |
a9b05723 | 1447 | if (!hiscore->ifa) |
072047e4 | 1448 | return -EADDRNOTAVAIL; |
1ab1457c | 1449 | |
4e3fd7a0 | 1450 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1451 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1452 | return 0; |
1da177e4 | 1453 | } |
5e5f3f0f | 1454 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1455 | |
8965779d AW |
1456 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
1457 | unsigned char banned_flags) | |
b7b1bfce HFS |
1458 | { |
1459 | struct inet6_ifaddr *ifp; | |
1460 | int err = -EADDRNOTAVAIL; | |
1461 | ||
1462 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
1463 | if (ifp->scope == IFA_LINK && | |
1464 | !(ifp->flags & banned_flags)) { | |
1465 | *addr = ifp->addr; | |
1466 | err = 0; | |
1467 | break; | |
1468 | } | |
1469 | } | |
1470 | return err; | |
1471 | } | |
1472 | ||
95c385b4 NH |
1473 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1474 | unsigned char banned_flags) | |
1da177e4 LT |
1475 | { |
1476 | struct inet6_dev *idev; | |
1477 | int err = -EADDRNOTAVAIL; | |
1478 | ||
8814c4b5 | 1479 | rcu_read_lock(); |
e21e8467 SH |
1480 | idev = __in6_dev_get(dev); |
1481 | if (idev) { | |
1da177e4 | 1482 | read_lock_bh(&idev->lock); |
b7b1bfce | 1483 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1484 | read_unlock_bh(&idev->lock); |
1485 | } | |
8814c4b5 | 1486 | rcu_read_unlock(); |
1da177e4 LT |
1487 | return err; |
1488 | } | |
1489 | ||
1490 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1491 | { | |
1492 | int cnt = 0; | |
1493 | struct inet6_ifaddr *ifp; | |
1494 | ||
1495 | read_lock_bh(&idev->lock); | |
502a2ffd | 1496 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1497 | cnt++; |
1498 | read_unlock_bh(&idev->lock); | |
1499 | return cnt; | |
1500 | } | |
1501 | ||
b71d1d42 | 1502 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1503 | const struct net_device *dev, int strict) |
1da177e4 | 1504 | { |
eedf042a | 1505 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1506 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1507 | |
5c578aed | 1508 | rcu_read_lock_bh(); |
b67bfe0d | 1509 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1510 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1511 | continue; |
1da177e4 | 1512 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1513 | !(ifp->flags&IFA_F_TENTATIVE) && |
1514 | (dev == NULL || ifp->idev->dev == dev || | |
1515 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1516 | rcu_read_unlock_bh(); | |
1517 | return 1; | |
1da177e4 LT |
1518 | } |
1519 | } | |
5c578aed | 1520 | |
eedf042a SH |
1521 | rcu_read_unlock_bh(); |
1522 | return 0; | |
1da177e4 | 1523 | } |
7159039a YH |
1524 | EXPORT_SYMBOL(ipv6_chk_addr); |
1525 | ||
3e81c6da DM |
1526 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1527 | struct net_device *dev) | |
1da177e4 | 1528 | { |
ddbe5032 | 1529 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1530 | struct inet6_ifaddr *ifp; |
1da177e4 | 1531 | |
b67bfe0d | 1532 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1533 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1534 | continue; |
1da177e4 LT |
1535 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1536 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1537 | return true; |
1da177e4 LT |
1538 | } |
1539 | } | |
3e81c6da | 1540 | return false; |
1da177e4 LT |
1541 | } |
1542 | ||
b71d1d42 | 1543 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1544 | { |
1545 | struct inet6_dev *idev; | |
1546 | struct inet6_ifaddr *ifa; | |
1547 | int onlink; | |
1548 | ||
1549 | onlink = 0; | |
1550 | rcu_read_lock(); | |
1551 | idev = __in6_dev_get(dev); | |
1552 | if (idev) { | |
1553 | read_lock_bh(&idev->lock); | |
502a2ffd | 1554 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1555 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1556 | ifa->prefix_len); | |
1557 | if (onlink) | |
1558 | break; | |
1559 | } | |
1560 | read_unlock_bh(&idev->lock); | |
1561 | } | |
1562 | rcu_read_unlock(); | |
1563 | return onlink; | |
1564 | } | |
52eeeb84 YH |
1565 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1566 | ||
9acd9f3a | 1567 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1568 | struct net_device *dev, int strict) |
1da177e4 | 1569 | { |
b79d1d54 | 1570 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1571 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1572 | |
5c578aed | 1573 | rcu_read_lock_bh(); |
b67bfe0d | 1574 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1575 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1576 | continue; |
1da177e4 LT |
1577 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1578 | if (dev == NULL || ifp->idev->dev == dev || | |
1579 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1580 | result = ifp; |
1da177e4 LT |
1581 | in6_ifa_hold(ifp); |
1582 | break; | |
1583 | } | |
1584 | } | |
1585 | } | |
5c578aed | 1586 | rcu_read_unlock_bh(); |
1da177e4 | 1587 | |
b79d1d54 | 1588 | return result; |
1da177e4 LT |
1589 | } |
1590 | ||
1da177e4 LT |
1591 | /* Gets referenced address, destroys ifaddr */ |
1592 | ||
cc411d0b | 1593 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1594 | { |
1da177e4 LT |
1595 | if (ifp->flags&IFA_F_PERMANENT) { |
1596 | spin_lock_bh(&ifp->lock); | |
b7b1bfce | 1597 | addrconf_del_dad_timer(ifp); |
1da177e4 | 1598 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1599 | if (dad_failed) |
1600 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1601 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1602 | if (dad_failed) |
1603 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1604 | in6_ifa_put(ifp); |
1605 | #ifdef CONFIG_IPV6_PRIVACY | |
1606 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1607 | struct inet6_ifaddr *ifpub; | |
1608 | spin_lock_bh(&ifp->lock); | |
1609 | ifpub = ifp->ifpub; | |
1610 | if (ifpub) { | |
1611 | in6_ifa_hold(ifpub); | |
1612 | spin_unlock_bh(&ifp->lock); | |
1613 | ipv6_create_tempaddr(ifpub, ifp); | |
1614 | in6_ifa_put(ifpub); | |
1615 | } else { | |
1616 | spin_unlock_bh(&ifp->lock); | |
1617 | } | |
1618 | ipv6_del_addr(ifp); | |
1619 | #endif | |
1620 | } else | |
1621 | ipv6_del_addr(ifp); | |
1622 | } | |
1623 | ||
f2344a13 HX |
1624 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1625 | { | |
1626 | int err = -ENOENT; | |
1627 | ||
1628 | spin_lock(&ifp->state_lock); | |
1629 | if (ifp->state == INET6_IFADDR_STATE_DAD) { | |
1630 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1631 | err = 0; | |
1632 | } | |
1633 | spin_unlock(&ifp->state_lock); | |
1634 | ||
1635 | return err; | |
1636 | } | |
1637 | ||
3c21edbd YH |
1638 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1639 | { | |
1b34be74 | 1640 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1641 | |
853dc2e0 UB |
1642 | if (addrconf_dad_end(ifp)) { |
1643 | in6_ifa_put(ifp); | |
f2344a13 | 1644 | return; |
853dc2e0 | 1645 | } |
f2344a13 | 1646 | |
e87cc472 JP |
1647 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1648 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1649 | |
1b34be74 YH |
1650 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1651 | struct in6_addr addr; | |
1652 | ||
1653 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1654 | addr.s6_addr32[1] = 0; | |
1655 | ||
1656 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1657 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1658 | /* DAD failed for link-local based on MAC address */ | |
1659 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1660 | |
f3213831 | 1661 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1662 | ifp->idev->dev->name); |
1b34be74 YH |
1663 | } |
1664 | } | |
1665 | ||
cc411d0b | 1666 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1667 | } |
1da177e4 LT |
1668 | |
1669 | /* Join to solicited addr multicast group. */ | |
1670 | ||
b71d1d42 | 1671 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1672 | { |
1673 | struct in6_addr maddr; | |
1674 | ||
1675 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1676 | return; | |
1677 | ||
1678 | addrconf_addr_solict_mult(addr, &maddr); | |
1679 | ipv6_dev_mc_inc(dev, &maddr); | |
1680 | } | |
1681 | ||
b71d1d42 | 1682 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1683 | { |
1684 | struct in6_addr maddr; | |
1685 | ||
1686 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1687 | return; | |
1688 | ||
1689 | addrconf_addr_solict_mult(addr, &maddr); | |
1690 | __ipv6_dev_mc_dec(idev, &maddr); | |
1691 | } | |
1692 | ||
20380731 | 1693 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1694 | { |
1695 | struct in6_addr addr; | |
2bda8a0c BM |
1696 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1697 | return; | |
1da177e4 LT |
1698 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1699 | if (ipv6_addr_any(&addr)) | |
1700 | return; | |
1701 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1702 | } | |
1703 | ||
20380731 | 1704 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1705 | { |
1706 | struct in6_addr addr; | |
32019e65 YH |
1707 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1708 | return; | |
1da177e4 LT |
1709 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1710 | if (ipv6_addr_any(&addr)) | |
1711 | return; | |
1712 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1713 | } | |
1714 | ||
073a8e0e YH |
1715 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1716 | { | |
1717 | if (dev->addr_len != ETH_ALEN) | |
1718 | return -1; | |
1719 | memcpy(eui, dev->dev_addr, 3); | |
1720 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1721 | ||
1722 | /* | |
1723 | * The zSeries OSA network cards can be shared among various | |
1724 | * OS instances, but the OSA cards have only one MAC address. | |
1725 | * This leads to duplicate address conflicts in conjunction | |
1726 | * with IPv6 if more than one instance uses the same card. | |
1727 | * | |
1728 | * The driver for these cards can deliver a unique 16-bit | |
1729 | * identifier for each instance sharing the same card. It is | |
1730 | * placed instead of 0xFFFE in the interface identifier. The | |
1731 | * "u" bit of the interface identifier is not inverted in this | |
1732 | * case. Hence the resulting interface identifier has local | |
1733 | * scope according to RFC2373. | |
1734 | */ | |
1735 | if (dev->dev_id) { | |
1736 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1737 | eui[4] = dev->dev_id & 0xFF; | |
1738 | } else { | |
1739 | eui[3] = 0xFF; | |
1740 | eui[4] = 0xFE; | |
1741 | eui[0] ^= 2; | |
1742 | } | |
1743 | return 0; | |
1744 | } | |
1745 | ||
06a4c1c5 | 1746 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1747 | { | |
1748 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1749 | return -1; | |
1750 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1751 | eui[0] ^= 2; |
06a4c1c5 | 1752 | return 0; |
1753 | } | |
1754 | ||
cb6bf355 YH |
1755 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1756 | { | |
1757 | union fwnet_hwaddr *ha; | |
1758 | ||
1759 | if (dev->addr_len != FWNET_ALEN) | |
1760 | return -1; | |
1761 | ||
1762 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1763 | ||
1764 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1765 | eui[0] ^= 2; | |
1766 | return 0; | |
1767 | } | |
1768 | ||
073a8e0e YH |
1769 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1770 | { | |
1771 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1772 | if (dev->addr_len != ARCNET_ALEN) | |
1773 | return -1; | |
1774 | memset(eui, 0, 7); | |
8e5e8f30 | 1775 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1776 | return 0; |
1777 | } | |
1778 | ||
1779 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1780 | { | |
1781 | if (dev->addr_len != INFINIBAND_ALEN) | |
1782 | return -1; | |
1783 | memcpy(eui, dev->dev_addr + 12, 8); | |
1784 | eui[0] |= 2; | |
1785 | return 0; | |
1786 | } | |
1787 | ||
c61393ea | 1788 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1789 | { |
9af28511 SH |
1790 | if (addr == 0) |
1791 | return -1; | |
dfd982ba YH |
1792 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1793 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1794 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1795 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1796 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1797 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1798 | eui[1] = 0; | |
1799 | eui[2] = 0x5E; | |
1800 | eui[3] = 0xFE; | |
1801 | memcpy(eui + 4, &addr, 4); | |
1802 | return 0; | |
1803 | } | |
dfd982ba YH |
1804 | |
1805 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1806 | { | |
1807 | if (dev->priv_flags & IFF_ISATAP) | |
1808 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1809 | return -1; | |
1810 | } | |
1811 | ||
aee80b54 | 1812 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1813 | { | |
1814 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1815 | } | |
1816 | ||
e837735e ND |
1817 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
1818 | { | |
1819 | memcpy(eui, dev->perm_addr, 3); | |
1820 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
1821 | eui[3] = 0xFF; | |
1822 | eui[4] = 0xFE; | |
1823 | eui[0] ^= 2; | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1da177e4 LT |
1827 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1828 | { | |
1829 | switch (dev->type) { | |
1830 | case ARPHRD_ETHER: | |
1831 | case ARPHRD_FDDI: | |
073a8e0e | 1832 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1833 | case ARPHRD_ARCNET: |
073a8e0e | 1834 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1835 | case ARPHRD_INFINIBAND: |
073a8e0e | 1836 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1837 | case ARPHRD_SIT: |
dfd982ba | 1838 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1839 | case ARPHRD_IPGRE: |
1840 | return addrconf_ifid_gre(eui, dev); | |
06a4c1c5 | 1841 | case ARPHRD_IEEE802154: |
1842 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1843 | case ARPHRD_IEEE1394: |
1844 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
1845 | case ARPHRD_TUNNEL6: |
1846 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
1847 | } |
1848 | return -1; | |
1849 | } | |
1850 | ||
1851 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1852 | { | |
1853 | int err = -1; | |
1854 | struct inet6_ifaddr *ifp; | |
1855 | ||
1856 | read_lock_bh(&idev->lock); | |
502a2ffd | 1857 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1858 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1859 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1860 | err = 0; | |
1861 | break; | |
1862 | } | |
1863 | } | |
1864 | read_unlock_bh(&idev->lock); | |
1865 | return err; | |
1866 | } | |
1867 | ||
1868 | #ifdef CONFIG_IPV6_PRIVACY | |
1869 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
eb7e0575 | 1870 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1871 | { |
1da177e4 | 1872 | regen: |
955189ef | 1873 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1874 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1875 | |
1876 | /* | |
1877 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1878 | * check if generated address is not inappropriate | |
1879 | * | |
1880 | * - Reserved subnet anycast (RFC 2526) | |
1881 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1882 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1883 | * 00-00-5E-FE-xx-xx-xx-xx |
1884 | * - value 0 | |
1885 | * - XXX: already assigned to an address on the device | |
1886 | */ | |
1ab1457c | 1887 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1888 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1889 | (idev->rndid[7]&0x80)) | |
1890 | goto regen; | |
1891 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1892 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1893 | goto regen; | |
1894 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1895 | goto regen; | |
1896 | } | |
1da177e4 LT |
1897 | } |
1898 | ||
1899 | static void ipv6_regen_rndid(unsigned long data) | |
1900 | { | |
1901 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1902 | unsigned long expires; | |
1903 | ||
8814c4b5 | 1904 | rcu_read_lock_bh(); |
1da177e4 LT |
1905 | write_lock_bh(&idev->lock); |
1906 | ||
1907 | if (idev->dead) | |
1908 | goto out; | |
1909 | ||
eb7e0575 | 1910 | __ipv6_regen_rndid(idev); |
1ab1457c | 1911 | |
1da177e4 | 1912 | expires = jiffies + |
1ab1457c | 1913 | idev->cnf.temp_prefered_lft * HZ - |
784e2710 BH |
1914 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
1915 | idev->cnf.max_desync_factor * HZ; | |
1da177e4 | 1916 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1917 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1918 | __func__, idev->dev->name); | |
1da177e4 LT |
1919 | goto out; |
1920 | } | |
1921 | ||
1922 | if (!mod_timer(&idev->regen_timer, expires)) | |
1923 | in6_dev_hold(idev); | |
1924 | ||
1925 | out: | |
1926 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1927 | rcu_read_unlock_bh(); |
1da177e4 LT |
1928 | in6_dev_put(idev); |
1929 | } | |
1930 | ||
eb7e0575 | 1931 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 1932 | { |
1da177e4 | 1933 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 1934 | __ipv6_regen_rndid(idev); |
1da177e4 LT |
1935 | } |
1936 | #endif | |
1937 | ||
1938 | /* | |
1939 | * Add prefix route. | |
1940 | */ | |
1941 | ||
1942 | static void | |
1943 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1944 | unsigned long expires, u32 flags) |
1da177e4 | 1945 | { |
86872cb5 TG |
1946 | struct fib6_config cfg = { |
1947 | .fc_table = RT6_TABLE_PREFIX, | |
1948 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1949 | .fc_ifindex = dev->ifindex, | |
1950 | .fc_expires = expires, | |
1951 | .fc_dst_len = plen, | |
1952 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1953 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1954 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1955 | }; |
1da177e4 | 1956 | |
4e3fd7a0 | 1957 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1958 | |
1959 | /* Prevent useless cloning on PtP SIT. | |
1960 | This thing is done here expecting that the whole | |
1961 | class of non-broadcast devices need not cloning. | |
1962 | */ | |
07a93626 | 1963 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
1964 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1965 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1966 | #endif |
1da177e4 | 1967 | |
86872cb5 | 1968 | ip6_route_add(&cfg); |
1da177e4 LT |
1969 | } |
1970 | ||
14ef37b6 AH |
1971 | |
1972 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
1973 | int plen, | |
1974 | const struct net_device *dev, | |
1975 | u32 flags, u32 noflags) | |
1976 | { | |
1977 | struct fib6_node *fn; | |
1978 | struct rt6_info *rt = NULL; | |
1979 | struct fib6_table *table; | |
1980 | ||
1981 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
1982 | if (table == NULL) | |
1983 | return NULL; | |
1984 | ||
5744dd9b | 1985 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
1986 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
1987 | if (!fn) | |
1988 | goto out; | |
1989 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 1990 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
1991 | continue; |
1992 | if ((rt->rt6i_flags & flags) != flags) | |
1993 | continue; | |
85da53bf | 1994 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
1995 | continue; |
1996 | dst_hold(&rt->dst); | |
1997 | break; | |
1998 | } | |
1999 | out: | |
5744dd9b | 2000 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2001 | return rt; |
2002 | } | |
2003 | ||
2004 | ||
1da177e4 LT |
2005 | /* Create "default" multicast route to the interface */ |
2006 | ||
2007 | static void addrconf_add_mroute(struct net_device *dev) | |
2008 | { | |
86872cb5 TG |
2009 | struct fib6_config cfg = { |
2010 | .fc_table = RT6_TABLE_LOCAL, | |
2011 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2012 | .fc_ifindex = dev->ifindex, | |
2013 | .fc_dst_len = 8, | |
2014 | .fc_flags = RTF_UP, | |
c346dca1 | 2015 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2016 | }; |
2017 | ||
2018 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2019 | ||
2020 | ip6_route_add(&cfg); | |
1da177e4 LT |
2021 | } |
2022 | ||
07a93626 | 2023 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2024 | static void sit_route_add(struct net_device *dev) |
2025 | { | |
86872cb5 TG |
2026 | struct fib6_config cfg = { |
2027 | .fc_table = RT6_TABLE_MAIN, | |
2028 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2029 | .fc_ifindex = dev->ifindex, | |
2030 | .fc_dst_len = 96, | |
2031 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 2032 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 2033 | }; |
1da177e4 LT |
2034 | |
2035 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 2036 | ip6_route_add(&cfg); |
1da177e4 | 2037 | } |
0be669bb | 2038 | #endif |
1da177e4 | 2039 | |
1da177e4 LT |
2040 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2041 | { | |
2042 | struct inet6_dev *idev; | |
2043 | ||
2044 | ASSERT_RTNL(); | |
2045 | ||
e21e8467 SH |
2046 | idev = ipv6_find_idev(dev); |
2047 | if (!idev) | |
64e724f6 BH |
2048 | return ERR_PTR(-ENOBUFS); |
2049 | ||
2050 | if (idev->cnf.disable_ipv6) | |
2051 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2052 | |
2053 | /* Add default multicast route */ | |
4af04aba LW |
2054 | if (!(dev->flags & IFF_LOOPBACK)) |
2055 | addrconf_add_mroute(dev); | |
1da177e4 | 2056 | |
1da177e4 LT |
2057 | return idev; |
2058 | } | |
2059 | ||
e6bff995 | 2060 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2061 | { |
2062 | struct prefix_info *pinfo; | |
2063 | __u32 valid_lft; | |
2064 | __u32 prefered_lft; | |
2065 | int addr_type; | |
1da177e4 | 2066 | struct inet6_dev *in6_dev; |
56d417b1 | 2067 | struct net *net = dev_net(dev); |
1da177e4 LT |
2068 | |
2069 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2070 | |
1da177e4 | 2071 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2072 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2073 | return; |
2074 | } | |
1ab1457c | 2075 | |
1da177e4 LT |
2076 | /* |
2077 | * Validation checks ([ADDRCONF], page 19) | |
2078 | */ | |
2079 | ||
2080 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2081 | ||
2082 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2083 | return; | |
2084 | ||
2085 | valid_lft = ntohl(pinfo->valid); | |
2086 | prefered_lft = ntohl(pinfo->prefered); | |
2087 | ||
2088 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2089 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2090 | return; |
2091 | } | |
2092 | ||
2093 | in6_dev = in6_dev_get(dev); | |
2094 | ||
2095 | if (in6_dev == NULL) { | |
e87cc472 JP |
2096 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2097 | dev->name); | |
1da177e4 LT |
2098 | return; |
2099 | } | |
2100 | ||
2101 | /* | |
2102 | * Two things going on here: | |
2103 | * 1) Add routes for on-link prefixes | |
2104 | * 2) Configure prefixes with the auto flag set | |
2105 | */ | |
2106 | ||
4bed72e4 YH |
2107 | if (pinfo->onlink) { |
2108 | struct rt6_info *rt; | |
2109 | unsigned long rt_expires; | |
2110 | ||
6f704992 YH |
2111 | /* Avoid arithmetic overflow. Really, we could |
2112 | * save rt_expires in seconds, likely valid_lft, | |
2113 | * but it would require division in fib gc, that it | |
2114 | * not good. | |
2115 | */ | |
4bed72e4 YH |
2116 | if (HZ > USER_HZ) |
2117 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2118 | else | |
2119 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2120 | |
4bed72e4 YH |
2121 | if (addrconf_finite_timeout(rt_expires)) |
2122 | rt_expires *= HZ; | |
1da177e4 | 2123 | |
14ef37b6 AH |
2124 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2125 | pinfo->prefix_len, | |
2126 | dev, | |
2127 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2128 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2129 | |
14ef37b6 | 2130 | if (rt) { |
6f704992 YH |
2131 | /* Autoconf prefix route */ |
2132 | if (valid_lft == 0) { | |
2133 | ip6_del_rt(rt); | |
2134 | rt = NULL; | |
4bed72e4 | 2135 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2136 | /* not infinity */ |
1716a961 | 2137 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2138 | } else { |
1716a961 | 2139 | rt6_clean_expires(rt); |
1da177e4 LT |
2140 | } |
2141 | } else if (valid_lft) { | |
6f704992 | 2142 | clock_t expires = 0; |
4bed72e4 YH |
2143 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2144 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2145 | /* not infinity */ |
2146 | flags |= RTF_EXPIRES; | |
2147 | expires = jiffies_to_clock_t(rt_expires); | |
2148 | } | |
1da177e4 | 2149 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2150 | dev, expires, flags); |
1da177e4 | 2151 | } |
94e187c0 | 2152 | ip6_rt_put(rt); |
1da177e4 LT |
2153 | } |
2154 | ||
2155 | /* Try to figure out our local address for this prefix */ | |
2156 | ||
2157 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2158 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2159 | struct in6_addr addr; |
2160 | int create = 0, update_lft = 0; | |
617fe29d | 2161 | bool tokenized = false; |
1da177e4 LT |
2162 | |
2163 | if (pinfo->prefix_len == 64) { | |
2164 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2165 | |
2166 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2167 | read_lock_bh(&in6_dev->lock); | |
2168 | memcpy(addr.s6_addr + 8, | |
2169 | in6_dev->token.s6_addr + 8, 8); | |
2170 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2171 | tokenized = true; |
f53adae4 DB |
2172 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2173 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2174 | in6_dev_put(in6_dev); |
2175 | return; | |
2176 | } | |
2177 | goto ok; | |
2178 | } | |
e87cc472 JP |
2179 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2180 | pinfo->prefix_len); | |
1da177e4 LT |
2181 | in6_dev_put(in6_dev); |
2182 | return; | |
2183 | ||
2184 | ok: | |
2185 | ||
53b7997f | 2186 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2187 | |
2188 | if (ifp == NULL && valid_lft) { | |
2189 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2190 | u32 addr_flags = 0; |
2191 | ||
2192 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2193 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2194 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2195 | addr_flags = IFA_F_OPTIMISTIC; |
2196 | #endif | |
1da177e4 LT |
2197 | |
2198 | /* Do not allow to create too much of autoconfigured | |
2199 | * addresses; this would be too easy way to crash kernel. | |
2200 | */ | |
2201 | if (!max_addresses || | |
2202 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2203 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2204 | pinfo->prefix_len, | |
95c385b4 | 2205 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2206 | addr_flags, valid_lft, |
2207 | prefered_lft); | |
1da177e4 | 2208 | |
3f0d2ba0 | 2209 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2210 | in6_dev_put(in6_dev); |
2211 | return; | |
2212 | } | |
2213 | ||
8a226b2c JB |
2214 | update_lft = 0; |
2215 | create = 1; | |
1da177e4 | 2216 | ifp->cstamp = jiffies; |
617fe29d | 2217 | ifp->tokenized = tokenized; |
cf22f9a2 | 2218 | addrconf_dad_start(ifp); |
1da177e4 LT |
2219 | } |
2220 | ||
2221 | if (ifp) { | |
2222 | int flags; | |
2223 | unsigned long now; | |
2224 | #ifdef CONFIG_IPV6_PRIVACY | |
2225 | struct inet6_ifaddr *ift; | |
2226 | #endif | |
2227 | u32 stored_lft; | |
2228 | ||
2229 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2230 | spin_lock(&ifp->lock); | |
2231 | now = jiffies; | |
2232 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2233 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2234 | else | |
2235 | stored_lft = 0; | |
8a226b2c | 2236 | if (!update_lft && !create && stored_lft) { |
1da177e4 LT |
2237 | if (valid_lft > MIN_VALID_LIFETIME || |
2238 | valid_lft > stored_lft) | |
2239 | update_lft = 1; | |
2240 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
2241 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
2242 | /* |
2243 | * RFC 4862 Section 5.5.3e: | |
2244 | * "Note that the preferred lifetime of | |
2245 | * the corresponding address is always | |
2246 | * reset to the Preferred Lifetime in | |
2247 | * the received Prefix Information | |
2248 | * option, regardless of whether the | |
2249 | * valid lifetime is also reset or | |
2250 | * ignored." | |
2251 | * | |
2252 | * So if the preferred lifetime in | |
2253 | * this advertisement is different | |
2254 | * than what we have stored, but the | |
2255 | * valid lifetime is invalid, just | |
2256 | * reset prefered_lft. | |
2257 | * | |
2258 | * We must set the valid lifetime | |
2259 | * to the stored lifetime since we'll | |
2260 | * be updating the timestamp below, | |
2261 | * else we'll set it back to the | |
25985edc | 2262 | * minimum. |
a1ed0526 BH |
2263 | */ |
2264 | if (prefered_lft != ifp->prefered_lft) { | |
2265 | valid_lft = stored_lft; | |
2266 | update_lft = 1; | |
2267 | } | |
1da177e4 LT |
2268 | } else { |
2269 | valid_lft = MIN_VALID_LIFETIME; | |
2270 | if (valid_lft < prefered_lft) | |
2271 | prefered_lft = valid_lft; | |
2272 | update_lft = 1; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | if (update_lft) { | |
2277 | ifp->valid_lft = valid_lft; | |
2278 | ifp->prefered_lft = prefered_lft; | |
2279 | ifp->tstamp = now; | |
2280 | flags = ifp->flags; | |
2281 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2282 | spin_unlock(&ifp->lock); | |
2283 | ||
2284 | if (!(flags&IFA_F_TENTATIVE)) | |
2285 | ipv6_ifa_notify(0, ifp); | |
2286 | } else | |
2287 | spin_unlock(&ifp->lock); | |
2288 | ||
2289 | #ifdef CONFIG_IPV6_PRIVACY | |
2290 | read_lock_bh(&in6_dev->lock); | |
2291 | /* update all temporary addresses in the list */ | |
76f793e3 LC |
2292 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
2293 | tmp_list) { | |
2294 | int age, max_valid, max_prefered; | |
2295 | ||
c6fbfac2 BB |
2296 | if (ifp != ift->ifpub) |
2297 | continue; | |
2298 | ||
76f793e3 LC |
2299 | /* |
2300 | * RFC 4941 section 3.3: | |
2301 | * If a received option will extend the lifetime | |
2302 | * of a public address, the lifetimes of | |
2303 | * temporary addresses should be extended, | |
2304 | * subject to the overall constraint that no | |
2305 | * temporary addresses should ever remain | |
2306 | * "valid" or "preferred" for a time longer than | |
2307 | * (TEMP_VALID_LIFETIME) or | |
2308 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), | |
2309 | * respectively. | |
2310 | */ | |
2311 | age = (now - ift->cstamp) / HZ; | |
2312 | max_valid = in6_dev->cnf.temp_valid_lft - age; | |
2313 | if (max_valid < 0) | |
2314 | max_valid = 0; | |
2315 | ||
2316 | max_prefered = in6_dev->cnf.temp_prefered_lft - | |
2317 | in6_dev->cnf.max_desync_factor - | |
2318 | age; | |
2319 | if (max_prefered < 0) | |
2320 | max_prefered = 0; | |
2321 | ||
2322 | if (valid_lft > max_valid) | |
2323 | valid_lft = max_valid; | |
2324 | ||
2325 | if (prefered_lft > max_prefered) | |
2326 | prefered_lft = max_prefered; | |
2327 | ||
1da177e4 LT |
2328 | spin_lock(&ift->lock); |
2329 | flags = ift->flags; | |
76f793e3 LC |
2330 | ift->valid_lft = valid_lft; |
2331 | ift->prefered_lft = prefered_lft; | |
2332 | ift->tstamp = now; | |
2333 | if (prefered_lft > 0) | |
2334 | ift->flags &= ~IFA_F_DEPRECATED; | |
2335 | ||
1da177e4 LT |
2336 | spin_unlock(&ift->lock); |
2337 | if (!(flags&IFA_F_TENTATIVE)) | |
2338 | ipv6_ifa_notify(0, ift); | |
2339 | } | |
2340 | ||
aed65501 | 2341 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4 | 2342 | /* |
76f793e3 LC |
2343 | * When a new public address is created as |
2344 | * described in [ADDRCONF], also create a new | |
2345 | * temporary address. Also create a temporary | |
2346 | * address if it's enabled but no temporary | |
2347 | * address currently exists. | |
1da177e4 | 2348 | */ |
1ab1457c | 2349 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2350 | ipv6_create_tempaddr(ifp, NULL); |
2351 | } else { | |
2352 | read_unlock_bh(&in6_dev->lock); | |
2353 | } | |
2354 | #endif | |
2355 | in6_ifa_put(ifp); | |
2356 | addrconf_verify(0); | |
2357 | } | |
2358 | } | |
2359 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2360 | in6_dev_put(in6_dev); | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * Set destination address. | |
2365 | * Special case for SIT interfaces where we create a new "virtual" | |
2366 | * device. | |
2367 | */ | |
af284937 | 2368 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2369 | { |
2370 | struct in6_ifreq ireq; | |
2371 | struct net_device *dev; | |
2372 | int err = -EINVAL; | |
2373 | ||
2374 | rtnl_lock(); | |
2375 | ||
2376 | err = -EFAULT; | |
2377 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2378 | goto err_exit; | |
2379 | ||
af284937 | 2380 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2381 | |
2382 | err = -ENODEV; | |
2383 | if (dev == NULL) | |
2384 | goto err_exit; | |
2385 | ||
07a93626 | 2386 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2387 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2388 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2389 | struct ifreq ifr; |
1da177e4 LT |
2390 | struct ip_tunnel_parm p; |
2391 | ||
2392 | err = -EADDRNOTAVAIL; | |
2393 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2394 | goto err_exit; | |
2395 | ||
2396 | memset(&p, 0, sizeof(p)); | |
2397 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2398 | p.iph.saddr = 0; | |
2399 | p.iph.version = 4; | |
2400 | p.iph.ihl = 5; | |
2401 | p.iph.protocol = IPPROTO_IPV6; | |
2402 | p.iph.ttl = 64; | |
d20b3109 | 2403 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2404 | |
5bc3eb7e SH |
2405 | if (ops->ndo_do_ioctl) { |
2406 | mm_segment_t oldfs = get_fs(); | |
2407 | ||
2408 | set_fs(KERNEL_DS); | |
2409 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2410 | set_fs(oldfs); | |
2411 | } else | |
2412 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2413 | |
2414 | if (err == 0) { | |
2415 | err = -ENOBUFS; | |
af284937 DL |
2416 | dev = __dev_get_by_name(net, p.name); |
2417 | if (!dev) | |
1da177e4 LT |
2418 | goto err_exit; |
2419 | err = dev_open(dev); | |
2420 | } | |
2421 | } | |
0be669bb | 2422 | #endif |
1da177e4 LT |
2423 | |
2424 | err_exit: | |
2425 | rtnl_unlock(); | |
2426 | return err; | |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * Manual configuration of address on an interface | |
2431 | */ | |
b71d1d42 | 2432 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
caeaba79 | 2433 | const struct in6_addr *peer_pfx, |
24ef0da7 | 2434 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2435 | __u32 valid_lft) |
1da177e4 LT |
2436 | { |
2437 | struct inet6_ifaddr *ifp; | |
2438 | struct inet6_dev *idev; | |
2439 | struct net_device *dev; | |
2440 | int scope; | |
6f704992 YH |
2441 | u32 flags; |
2442 | clock_t expires; | |
4bed72e4 | 2443 | unsigned long timeout; |
1da177e4 LT |
2444 | |
2445 | ASSERT_RTNL(); | |
1ab1457c | 2446 | |
24ef0da7 TG |
2447 | if (plen > 128) |
2448 | return -EINVAL; | |
2449 | ||
0778769d NT |
2450 | /* check the lifetime */ |
2451 | if (!valid_lft || prefered_lft > valid_lft) | |
2452 | return -EINVAL; | |
2453 | ||
af284937 DL |
2454 | dev = __dev_get_by_index(net, ifindex); |
2455 | if (!dev) | |
1da177e4 | 2456 | return -ENODEV; |
1ab1457c | 2457 | |
64e724f6 BH |
2458 | idev = addrconf_add_dev(dev); |
2459 | if (IS_ERR(idev)) | |
2460 | return PTR_ERR(idev); | |
1da177e4 LT |
2461 | |
2462 | scope = ipv6_addr_scope(pfx); | |
2463 | ||
4bed72e4 YH |
2464 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2465 | if (addrconf_finite_timeout(timeout)) { | |
2466 | expires = jiffies_to_clock_t(timeout * HZ); | |
2467 | valid_lft = timeout; | |
6f704992 | 2468 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2469 | } else { |
2470 | expires = 0; | |
2471 | flags = 0; | |
2472 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2473 | } |
0778769d | 2474 | |
4bed72e4 YH |
2475 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2476 | if (addrconf_finite_timeout(timeout)) { | |
2477 | if (timeout == 0) | |
2478 | ifa_flags |= IFA_F_DEPRECATED; | |
2479 | prefered_lft = timeout; | |
2480 | } | |
0778769d | 2481 | |
8a226b2c JB |
2482 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2483 | valid_lft, prefered_lft); | |
0778769d | 2484 | |
1da177e4 | 2485 | if (!IS_ERR(ifp)) { |
46d48046 | 2486 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2487 | expires, flags); |
95c385b4 NH |
2488 | /* |
2489 | * Note that section 3.1 of RFC 4429 indicates | |
2490 | * that the Optimistic flag should not be set for | |
2491 | * manually configured addresses | |
2492 | */ | |
cf22f9a2 | 2493 | addrconf_dad_start(ifp); |
1da177e4 | 2494 | in6_ifa_put(ifp); |
0778769d | 2495 | addrconf_verify(0); |
1da177e4 LT |
2496 | return 0; |
2497 | } | |
2498 | ||
2499 | return PTR_ERR(ifp); | |
2500 | } | |
2501 | ||
b71d1d42 | 2502 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2503 | unsigned int plen) |
1da177e4 LT |
2504 | { |
2505 | struct inet6_ifaddr *ifp; | |
2506 | struct inet6_dev *idev; | |
2507 | struct net_device *dev; | |
1ab1457c | 2508 | |
24ef0da7 TG |
2509 | if (plen > 128) |
2510 | return -EINVAL; | |
2511 | ||
af284937 DL |
2512 | dev = __dev_get_by_index(net, ifindex); |
2513 | if (!dev) | |
1da177e4 LT |
2514 | return -ENODEV; |
2515 | ||
7eaa48a4 | 2516 | if ((idev = __in6_dev_get(dev)) == NULL) |
1da177e4 LT |
2517 | return -ENXIO; |
2518 | ||
2519 | read_lock_bh(&idev->lock); | |
502a2ffd | 2520 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2521 | if (ifp->prefix_len == plen && |
2522 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2523 | in6_ifa_hold(ifp); | |
2524 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2525 | |
1da177e4 | 2526 | ipv6_del_addr(ifp); |
1da177e4 LT |
2527 | return 0; |
2528 | } | |
2529 | } | |
2530 | read_unlock_bh(&idev->lock); | |
2531 | return -EADDRNOTAVAIL; | |
2532 | } | |
2533 | ||
2534 | ||
af284937 | 2535 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2536 | { |
2537 | struct in6_ifreq ireq; | |
2538 | int err; | |
1ab1457c | 2539 | |
af31f412 | 2540 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2541 | return -EPERM; |
1ab1457c | 2542 | |
1da177e4 LT |
2543 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2544 | return -EFAULT; | |
2545 | ||
2546 | rtnl_lock(); | |
caeaba79 | 2547 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2548 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2549 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2550 | rtnl_unlock(); |
2551 | return err; | |
2552 | } | |
2553 | ||
af284937 | 2554 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2555 | { |
2556 | struct in6_ifreq ireq; | |
2557 | int err; | |
1ab1457c | 2558 | |
af31f412 | 2559 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2560 | return -EPERM; |
2561 | ||
2562 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2563 | return -EFAULT; | |
2564 | ||
2565 | rtnl_lock(); | |
af284937 DL |
2566 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2567 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2568 | rtnl_unlock(); |
2569 | return err; | |
2570 | } | |
2571 | ||
b5f348e5 IJ |
2572 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2573 | int plen, int scope) | |
2574 | { | |
2575 | struct inet6_ifaddr *ifp; | |
2576 | ||
8a226b2c JB |
2577 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
2578 | scope, IFA_F_PERMANENT, 0, 0); | |
b5f348e5 IJ |
2579 | if (!IS_ERR(ifp)) { |
2580 | spin_lock_bh(&ifp->lock); | |
2581 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2582 | spin_unlock_bh(&ifp->lock); | |
2583 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2584 | in6_ifa_put(ifp); | |
2585 | } | |
2586 | } | |
2587 | ||
07a93626 | 2588 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2589 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2590 | { | |
1da177e4 LT |
2591 | struct in6_addr addr; |
2592 | struct net_device *dev; | |
c346dca1 | 2593 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2594 | int scope; |
2595 | ||
2596 | ASSERT_RTNL(); | |
2597 | ||
2598 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2599 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2600 | ||
2601 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2602 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2603 | scope = IFA_LINK; | |
2604 | } else { | |
2605 | scope = IPV6_ADDR_COMPATv4; | |
2606 | } | |
2607 | ||
2608 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2609 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2610 | return; |
2611 | } | |
2612 | ||
6fda7350 | 2613 | for_each_netdev(net, dev) { |
8e5e8f30 | 2614 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2615 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2616 | struct in_ifaddr *ifa; |
1da177e4 LT |
2617 | |
2618 | int flag = scope; | |
2619 | ||
2620 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2621 | int plen; | |
2622 | ||
2623 | addr.s6_addr32[3] = ifa->ifa_local; | |
2624 | ||
2625 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2626 | continue; | |
2627 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2628 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2629 | continue; | |
2630 | flag |= IFA_HOST; | |
2631 | } | |
2632 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2633 | plen = 64; | |
2634 | else | |
2635 | plen = 96; | |
2636 | ||
b5f348e5 | 2637 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2638 | } |
2639 | } | |
1ab1457c | 2640 | } |
1da177e4 | 2641 | } |
0be669bb | 2642 | #endif |
1da177e4 LT |
2643 | |
2644 | static void init_loopback(struct net_device *dev) | |
2645 | { | |
2646 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2647 | struct net_device *sp_dev; |
2648 | struct inet6_ifaddr *sp_ifa; | |
2649 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2650 | |
2651 | /* ::1 */ | |
2652 | ||
2653 | ASSERT_RTNL(); | |
2654 | ||
7eaa48a4 | 2655 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2656 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2657 | return; |
2658 | } | |
2659 | ||
b5f348e5 | 2660 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2661 | |
2662 | /* Add routes to other interface's IPv6 addresses */ | |
2663 | for_each_netdev(dev_net(dev), sp_dev) { | |
2664 | if (!strcmp(sp_dev->name, dev->name)) | |
2665 | continue; | |
2666 | ||
2667 | idev = __in6_dev_get(sp_dev); | |
2668 | if (!idev) | |
2669 | continue; | |
2670 | ||
2671 | read_lock_bh(&idev->lock); | |
2672 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2673 | ||
2674 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2675 | continue; | |
2676 | ||
a881ae1f G |
2677 | if (sp_ifa->rt) |
2678 | continue; | |
2679 | ||
25fb6ca4 BK |
2680 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0); |
2681 | ||
2682 | /* Failure cases are ignored */ | |
534c8779 G |
2683 | if (!IS_ERR(sp_rt)) { |
2684 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2685 | ip6_ins_rt(sp_rt); |
534c8779 | 2686 | } |
25fb6ca4 BK |
2687 | } |
2688 | read_unlock_bh(&idev->lock); | |
2689 | } | |
1da177e4 LT |
2690 | } |
2691 | ||
b71d1d42 | 2692 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2693 | { |
8e5e8f30 | 2694 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2695 | u32 addr_flags = IFA_F_PERMANENT; |
2696 | ||
2697 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2698 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2699 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2700 | addr_flags |= IFA_F_OPTIMISTIC; |
2701 | #endif | |
1da177e4 | 2702 | |
95c385b4 | 2703 | |
8a226b2c | 2704 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, 0, 0); |
1da177e4 | 2705 | if (!IS_ERR(ifp)) { |
46d48046 | 2706 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2707 | addrconf_dad_start(ifp); |
1da177e4 LT |
2708 | in6_ifa_put(ifp); |
2709 | } | |
2710 | } | |
2711 | ||
2712 | static void addrconf_dev_config(struct net_device *dev) | |
2713 | { | |
2714 | struct in6_addr addr; | |
8e5e8f30 | 2715 | struct inet6_dev *idev; |
1da177e4 LT |
2716 | |
2717 | ASSERT_RTNL(); | |
2718 | ||
74235a25 HX |
2719 | if ((dev->type != ARPHRD_ETHER) && |
2720 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2721 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2722 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 2723 | (dev->type != ARPHRD_IEEE802154) && |
e837735e ND |
2724 | (dev->type != ARPHRD_IEEE1394) && |
2725 | (dev->type != ARPHRD_TUNNEL6)) { | |
74235a25 HX |
2726 | /* Alas, we support only Ethernet autoconfiguration. */ |
2727 | return; | |
2728 | } | |
2729 | ||
1da177e4 | 2730 | idev = addrconf_add_dev(dev); |
64e724f6 | 2731 | if (IS_ERR(idev)) |
1da177e4 LT |
2732 | return; |
2733 | ||
2734 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2735 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2736 | ||
2737 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2738 | addrconf_add_linklocal(idev, &addr); | |
2739 | } | |
2740 | ||
07a93626 | 2741 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2742 | static void addrconf_sit_config(struct net_device *dev) |
2743 | { | |
2744 | struct inet6_dev *idev; | |
2745 | ||
2746 | ASSERT_RTNL(); | |
2747 | ||
1ab1457c YH |
2748 | /* |
2749 | * Configure the tunnel with one of our IPv4 | |
2750 | * addresses... we should configure all of | |
1da177e4 LT |
2751 | * our v4 addrs in the tunnel |
2752 | */ | |
2753 | ||
7eaa48a4 | 2754 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2755 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2756 | return; |
2757 | } | |
2758 | ||
c7dc89c0 FT |
2759 | if (dev->priv_flags & IFF_ISATAP) { |
2760 | struct in6_addr addr; | |
2761 | ||
2762 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2763 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2764 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2765 | addrconf_add_linklocal(idev, &addr); | |
2766 | return; | |
2767 | } | |
2768 | ||
1da177e4 LT |
2769 | sit_add_v4_addrs(idev); |
2770 | ||
62b54dd9 | 2771 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2772 | addrconf_add_mroute(dev); |
62b54dd9 | 2773 | else |
1da177e4 LT |
2774 | sit_route_add(dev); |
2775 | } | |
0be669bb | 2776 | #endif |
1da177e4 | 2777 | |
07a93626 | 2778 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2779 | static void addrconf_gre_config(struct net_device *dev) |
2780 | { | |
2781 | struct inet6_dev *idev; | |
2782 | struct in6_addr addr; | |
2783 | ||
aee80b54 | 2784 | ASSERT_RTNL(); |
2785 | ||
7eaa48a4 | 2786 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2787 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2788 | return; |
2789 | } | |
2790 | ||
2791 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2792 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2793 | ||
2794 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2795 | addrconf_add_linklocal(idev, &addr); | |
2796 | } | |
2797 | #endif | |
2798 | ||
1da177e4 LT |
2799 | static inline int |
2800 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2801 | { | |
2802 | struct in6_addr lladdr; | |
2803 | ||
95c385b4 | 2804 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2805 | addrconf_add_linklocal(idev, &lladdr); |
2806 | return 0; | |
2807 | } | |
2808 | return -1; | |
2809 | } | |
2810 | ||
1ab1457c | 2811 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 2812 | void *ptr) |
1da177e4 | 2813 | { |
351638e7 | 2814 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 2815 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2816 | int run_pending = 0; |
b217d616 | 2817 | int err; |
1da177e4 | 2818 | |
e21e8467 | 2819 | switch (event) { |
45ba9dd2 | 2820 | case NETDEV_REGISTER: |
74235a25 | 2821 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2822 | idev = ipv6_add_dev(dev); |
2823 | if (!idev) | |
b217d616 | 2824 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2825 | } |
2826 | break; | |
bcdd553f | 2827 | |
1da177e4 | 2828 | case NETDEV_UP: |
3c21edbd | 2829 | case NETDEV_CHANGE: |
c2edacf8 JV |
2830 | if (dev->flags & IFF_SLAVE) |
2831 | break; | |
2832 | ||
3c21edbd | 2833 | if (event == NETDEV_UP) { |
f24e3d65 | 2834 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2835 | /* device is not ready yet. */ |
f3213831 | 2836 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2837 | dev->name); |
2838 | break; | |
2839 | } | |
99081049 | 2840 | |
d31c7b8f EP |
2841 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2842 | idev = ipv6_add_dev(dev); | |
2843 | ||
e3ec6cfc | 2844 | if (idev) { |
99081049 | 2845 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2846 | run_pending = 1; |
2847 | } | |
3c21edbd | 2848 | } else { |
f24e3d65 | 2849 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2850 | /* device is still not ready. */ |
2851 | break; | |
2852 | } | |
2853 | ||
2854 | if (idev) { | |
bcdd553f | 2855 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2856 | /* device is already configured. */ |
2857 | break; | |
3c21edbd YH |
2858 | idev->if_flags |= IF_READY; |
2859 | } | |
2860 | ||
f3213831 JP |
2861 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2862 | dev->name); | |
3c21edbd | 2863 | |
c5e33bdd | 2864 | run_pending = 1; |
3c21edbd YH |
2865 | } |
2866 | ||
e21e8467 | 2867 | switch (dev->type) { |
07a93626 | 2868 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2869 | case ARPHRD_SIT: |
2870 | addrconf_sit_config(dev); | |
2871 | break; | |
aee80b54 | 2872 | #endif |
07a93626 | 2873 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2874 | case ARPHRD_IPGRE: |
2875 | addrconf_gre_config(dev); | |
2876 | break; | |
0be669bb | 2877 | #endif |
1da177e4 LT |
2878 | case ARPHRD_LOOPBACK: |
2879 | init_loopback(dev); | |
2880 | break; | |
2881 | ||
2882 | default: | |
2883 | addrconf_dev_config(dev); | |
2884 | break; | |
3ff50b79 | 2885 | } |
bcdd553f | 2886 | |
1da177e4 | 2887 | if (idev) { |
c5e33bdd YH |
2888 | if (run_pending) |
2889 | addrconf_dad_run(idev); | |
2890 | ||
bcdd553f SH |
2891 | /* |
2892 | * If the MTU changed during the interface down, | |
2893 | * when the interface up, the changed MTU must be | |
2894 | * reflected in the idev as well as routers. | |
1da177e4 | 2895 | */ |
bcdd553f SH |
2896 | if (idev->cnf.mtu6 != dev->mtu && |
2897 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2898 | rt6_mtu_change(dev, dev->mtu); |
2899 | idev->cnf.mtu6 = dev->mtu; | |
2900 | } | |
2901 | idev->tstamp = jiffies; | |
2902 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2903 | |
2904 | /* | |
2905 | * If the changed mtu during down is lower than | |
2906 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2907 | */ |
2908 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2909 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2910 | } |
2911 | break; | |
2912 | ||
2913 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2914 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2915 | rt6_mtu_change(dev, dev->mtu); |
2916 | idev->cnf.mtu6 = dev->mtu; | |
2917 | break; | |
2918 | } | |
2919 | ||
d31c7b8f EP |
2920 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2921 | idev = ipv6_add_dev(dev); | |
2922 | if (idev) | |
2923 | break; | |
2924 | } | |
2925 | ||
bcdd553f SH |
2926 | /* |
2927 | * MTU falled under IPV6_MIN_MTU. | |
2928 | * Stop IPv6 on this interface. | |
2929 | */ | |
1da177e4 LT |
2930 | |
2931 | case NETDEV_DOWN: | |
2932 | case NETDEV_UNREGISTER: | |
2933 | /* | |
2934 | * Remove all addresses from this interface. | |
2935 | */ | |
2936 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2937 | break; | |
3c21edbd | 2938 | |
1da177e4 | 2939 | case NETDEV_CHANGENAME: |
1da177e4 | 2940 | if (idev) { |
5632c515 | 2941 | snmp6_unregister_dev(idev); |
408c4768 | 2942 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2943 | addrconf_sysctl_register(idev); |
b217d616 HX |
2944 | err = snmp6_register_dev(idev); |
2945 | if (err) | |
2946 | return notifier_from_errno(err); | |
5632c515 | 2947 | } |
1da177e4 | 2948 | break; |
bcdd553f | 2949 | |
93d9b7d7 JP |
2950 | case NETDEV_PRE_TYPE_CHANGE: |
2951 | case NETDEV_POST_TYPE_CHANGE: | |
2952 | addrconf_type_change(dev, event); | |
75c78500 | 2953 | break; |
3ff50b79 | 2954 | } |
1da177e4 LT |
2955 | |
2956 | return NOTIFY_OK; | |
2957 | } | |
2958 | ||
2959 | /* | |
2960 | * addrconf module should be notified of a device going up | |
2961 | */ | |
2962 | static struct notifier_block ipv6_dev_notf = { | |
2963 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2964 | }; |
2965 | ||
93d9b7d7 | 2966 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2967 | { |
2968 | struct inet6_dev *idev; | |
2969 | ASSERT_RTNL(); | |
2970 | ||
2971 | idev = __in6_dev_get(dev); | |
2972 | ||
93d9b7d7 | 2973 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2974 | ipv6_mc_remap(idev); |
93d9b7d7 | 2975 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2976 | ipv6_mc_unmap(idev); |
2977 | } | |
2978 | ||
1da177e4 LT |
2979 | static int addrconf_ifdown(struct net_device *dev, int how) |
2980 | { | |
c346dca1 | 2981 | struct net *net = dev_net(dev); |
502a2ffd | 2982 | struct inet6_dev *idev; |
2983 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 2984 | int state, i; |
1da177e4 LT |
2985 | |
2986 | ASSERT_RTNL(); | |
2987 | ||
73a8bd74 DM |
2988 | rt6_ifdown(net, dev); |
2989 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
2990 | |
2991 | idev = __in6_dev_get(dev); | |
2992 | if (idev == NULL) | |
2993 | return -ENODEV; | |
2994 | ||
bcdd553f SH |
2995 | /* |
2996 | * Step 1: remove reference to ipv6 device from parent device. | |
2997 | * Do not dev_put! | |
1da177e4 | 2998 | */ |
439e2385 | 2999 | if (how) { |
1da177e4 | 3000 | idev->dead = 1; |
8814c4b5 YH |
3001 | |
3002 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3003 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3004 | |
3005 | /* Step 1.5: remove snmp6 entry */ | |
3006 | snmp6_unregister_dev(idev); | |
3007 | ||
3008 | } | |
3009 | ||
73a8bd74 DM |
3010 | /* Step 2: clear hash table */ |
3011 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3012 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3013 | |
3014 | spin_lock_bh(&addrconf_hash_lock); | |
3015 | restart: | |
b67bfe0d | 3016 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3017 | if (ifa->idev == idev) { |
3018 | hlist_del_init_rcu(&ifa->addr_lst); | |
b7b1bfce | 3019 | addrconf_del_dad_timer(ifa); |
73a8bd74 DM |
3020 | goto restart; |
3021 | } | |
3022 | } | |
3023 | spin_unlock_bh(&addrconf_hash_lock); | |
3024 | } | |
3025 | ||
1da177e4 LT |
3026 | write_lock_bh(&idev->lock); |
3027 | ||
b7b1bfce HFS |
3028 | addrconf_del_rs_timer(idev); |
3029 | ||
bcdd553f | 3030 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3031 | if (!how) |
3c21edbd | 3032 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3033 | |
1da177e4 | 3034 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 3035 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3036 | in6_dev_put(idev); |
3037 | ||
bcdd553f | 3038 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3039 | while (!list_empty(&idev->tempaddr_list)) { |
3040 | ifa = list_first_entry(&idev->tempaddr_list, | |
3041 | struct inet6_ifaddr, tmp_list); | |
3042 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3043 | write_unlock_bh(&idev->lock); |
3044 | spin_lock_bh(&ifa->lock); | |
3045 | ||
3046 | if (ifa->ifpub) { | |
3047 | in6_ifa_put(ifa->ifpub); | |
3048 | ifa->ifpub = NULL; | |
3049 | } | |
3050 | spin_unlock_bh(&ifa->lock); | |
3051 | in6_ifa_put(ifa); | |
3052 | write_lock_bh(&idev->lock); | |
3053 | } | |
3054 | #endif | |
8f37ada5 | 3055 | |
502a2ffd | 3056 | while (!list_empty(&idev->addr_list)) { |
3057 | ifa = list_first_entry(&idev->addr_list, | |
3058 | struct inet6_ifaddr, if_list); | |
b7b1bfce | 3059 | addrconf_del_dad_timer(ifa); |
84e8b803 | 3060 | |
73a8bd74 | 3061 | list_del(&ifa->if_list); |
84e8b803 | 3062 | |
73a8bd74 | 3063 | write_unlock_bh(&idev->lock); |
84e8b803 | 3064 | |
73a8bd74 DM |
3065 | spin_lock_bh(&ifa->state_lock); |
3066 | state = ifa->state; | |
3067 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3068 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 3069 | |
73a8bd74 DM |
3070 | if (state != INET6_IFADDR_STATE_DEAD) { |
3071 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3072 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3073 | } |
73a8bd74 | 3074 | in6_ifa_put(ifa); |
8f37ada5 | 3075 | |
73a8bd74 DM |
3076 | write_lock_bh(&idev->lock); |
3077 | } | |
8f37ada5 | 3078 | |
1da177e4 LT |
3079 | write_unlock_bh(&idev->lock); |
3080 | ||
3081 | /* Step 5: Discard multicast list */ | |
439e2385 | 3082 | if (how) |
1da177e4 LT |
3083 | ipv6_mc_destroy_dev(idev); |
3084 | else | |
3085 | ipv6_mc_down(idev); | |
3086 | ||
1da177e4 | 3087 | idev->tstamp = jiffies; |
1ab1457c | 3088 | |
bcdd553f | 3089 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3090 | if (how) { |
408c4768 | 3091 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3092 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3093 | neigh_ifdown(&nd_tbl, dev); | |
3094 | in6_dev_put(idev); | |
3095 | } | |
3096 | return 0; | |
3097 | } | |
3098 | ||
3099 | static void addrconf_rs_timer(unsigned long data) | |
3100 | { | |
b7b1bfce HFS |
3101 | struct inet6_dev *idev = (struct inet6_dev *)data; |
3102 | struct in6_addr lladdr; | |
1da177e4 | 3103 | |
b7b1bfce | 3104 | write_lock(&idev->lock); |
5b2a1953 | 3105 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3106 | goto out; |
3107 | ||
9ba2add3 | 3108 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3109 | goto out; |
3110 | ||
3111 | /* Announcement received after solicitation was sent */ | |
3112 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3113 | goto out; |
1da177e4 | 3114 | |
b7b1bfce HFS |
3115 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
3116 | if (!__ipv6_get_lladdr(idev, &lladdr, IFA_F_TENTATIVE)) | |
3117 | ndisc_send_rs(idev->dev, &lladdr, | |
3118 | &in6addr_linklocal_allrouters); | |
3119 | else | |
3120 | goto out; | |
1da177e4 | 3121 | |
b7b1bfce HFS |
3122 | /* The wait after the last probe can be shorter */ |
3123 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3124 | idev->cnf.rtr_solicits) ? | |
3125 | idev->cnf.rtr_solicit_delay : | |
3126 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3127 | } else { |
1da177e4 LT |
3128 | /* |
3129 | * Note: we do not support deprecated "all on-link" | |
3130 | * assumption any longer. | |
3131 | */ | |
91df42be | 3132 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3133 | } |
3134 | ||
3135 | out: | |
b7b1bfce HFS |
3136 | write_unlock(&idev->lock); |
3137 | in6_dev_put(idev); | |
1da177e4 LT |
3138 | } |
3139 | ||
3140 | /* | |
3141 | * Duplicate Address Detection | |
3142 | */ | |
3c21edbd YH |
3143 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3144 | { | |
3145 | unsigned long rand_num; | |
3146 | struct inet6_dev *idev = ifp->idev; | |
3147 | ||
95c385b4 NH |
3148 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3149 | rand_num = 0; | |
3150 | else | |
3151 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
3152 | ||
b7b1bfce HFS |
3153 | ifp->dad_probes = idev->cnf.dad_transmits; |
3154 | addrconf_mod_dad_timer(ifp, rand_num); | |
3c21edbd YH |
3155 | } |
3156 | ||
cf22f9a2 | 3157 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3158 | { |
3159 | struct inet6_dev *idev = ifp->idev; | |
3160 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3161 | |
3162 | addrconf_join_solict(dev, &ifp->addr); | |
3163 | ||
1da177e4 | 3164 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3165 | |
3166 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3167 | spin_lock(&ifp->lock); |
e9d3e084 | 3168 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3169 | goto out; |
1da177e4 LT |
3170 | |
3171 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3172 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3173 | !(ifp->flags&IFA_F_TENTATIVE) || |
3174 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3175 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3176 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3177 | read_unlock_bh(&idev->lock); |
3178 | ||
3179 | addrconf_dad_completed(ifp); | |
3180 | return; | |
3181 | } | |
3182 | ||
6732bade | 3183 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3184 | spin_unlock(&ifp->lock); |
6732bade | 3185 | read_unlock_bh(&idev->lock); |
3c21edbd | 3186 | /* |
590a9887 | 3187 | * If the device is not ready: |
3c21edbd YH |
3188 | * - keep it tentative if it is a permanent address. |
3189 | * - otherwise, kill it. | |
3190 | */ | |
3191 | in6_ifa_hold(ifp); | |
cc411d0b | 3192 | addrconf_dad_stop(ifp, 0); |
6732bade | 3193 | return; |
3c21edbd | 3194 | } |
95c385b4 NH |
3195 | |
3196 | /* | |
3197 | * Optimistic nodes can start receiving | |
3198 | * Frames right away | |
3199 | */ | |
e21e8467 | 3200 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
3201 | ip6_ins_rt(ifp->rt); |
3202 | ||
6732bade | 3203 | addrconf_dad_kick(ifp); |
1da177e4 | 3204 | out: |
622ccdf1 | 3205 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3206 | read_unlock_bh(&idev->lock); |
3207 | } | |
3208 | ||
3209 | static void addrconf_dad_timer(unsigned long data) | |
3210 | { | |
3211 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
3212 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
3213 | struct in6_addr mcaddr; |
3214 | ||
b7b1bfce | 3215 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3216 | goto out; |
3217 | ||
b7b1bfce | 3218 | write_lock(&idev->lock); |
122e4519 | 3219 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
b7b1bfce | 3220 | write_unlock(&idev->lock); |
1da177e4 LT |
3221 | goto out; |
3222 | } | |
21809faf | 3223 | |
3224 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3225 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3226 | spin_unlock(&ifp->lock); | |
b7b1bfce | 3227 | write_unlock(&idev->lock); |
622ccdf1 HX |
3228 | goto out; |
3229 | } | |
3230 | ||
b7b1bfce | 3231 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3232 | /* |
3233 | * DAD was successful | |
3234 | */ | |
3235 | ||
cc411d0b | 3236 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3237 | spin_unlock(&ifp->lock); |
b7b1bfce | 3238 | write_unlock(&idev->lock); |
1da177e4 LT |
3239 | |
3240 | addrconf_dad_completed(ifp); | |
3241 | ||
3242 | goto out; | |
3243 | } | |
3244 | ||
b7b1bfce HFS |
3245 | ifp->dad_probes--; |
3246 | addrconf_mod_dad_timer(ifp, ifp->idev->nd_parms->retrans_time); | |
21809faf | 3247 | spin_unlock(&ifp->lock); |
b7b1bfce | 3248 | write_unlock(&idev->lock); |
1da177e4 LT |
3249 | |
3250 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3251 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3252 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3253 | out: |
3254 | in6_ifa_put(ifp); | |
3255 | } | |
3256 | ||
3257 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3258 | { | |
e21e8467 | 3259 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3260 | struct in6_addr lladdr; |
b173ee48 | 3261 | bool send_rs, send_mld; |
b7b1bfce HFS |
3262 | |
3263 | addrconf_del_dad_timer(ifp); | |
1da177e4 LT |
3264 | |
3265 | /* | |
3266 | * Configure the address for reception. Now it is valid. | |
3267 | */ | |
3268 | ||
3269 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3270 | ||
026359bc TA |
3271 | /* If added prefix is link local and we are prepared to process |
3272 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3273 | */ |
3274 | ||
1ec047eb HFS |
3275 | read_lock_bh(&ifp->idev->lock); |
3276 | spin_lock(&ifp->lock); | |
b173ee48 HFS |
3277 | send_mld = ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL && |
3278 | ifp->idev->valid_ll_addr_cnt == 1; | |
3279 | send_rs = send_mld && | |
3280 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3281 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3282 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3283 | spin_unlock(&ifp->lock); |
3284 | read_unlock_bh(&ifp->idev->lock); | |
3285 | ||
b173ee48 HFS |
3286 | /* While dad is in progress mld report's source address is in6_addrany. |
3287 | * Resend with proper ll now. | |
3288 | */ | |
3289 | if (send_mld) | |
3290 | ipv6_mc_dad_complete(ifp->idev); | |
3291 | ||
1ec047eb | 3292 | if (send_rs) { |
1da177e4 LT |
3293 | /* |
3294 | * If a host as already performed a random delay | |
3295 | * [...] as part of DAD [...] there is no need | |
3296 | * to delay again before sending the first RS | |
3297 | */ | |
1ec047eb | 3298 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3299 | return; |
1ec047eb | 3300 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3301 | |
b7b1bfce HFS |
3302 | write_lock_bh(&ifp->idev->lock); |
3303 | spin_lock(&ifp->lock); | |
3304 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3305 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3306 | addrconf_mod_rs_timer(ifp->idev, |
3307 | ifp->idev->cnf.rtr_solicit_interval); | |
3308 | spin_unlock(&ifp->lock); | |
3309 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3310 | } |
3311 | } | |
3312 | ||
e21e8467 SH |
3313 | static void addrconf_dad_run(struct inet6_dev *idev) |
3314 | { | |
c5e33bdd YH |
3315 | struct inet6_ifaddr *ifp; |
3316 | ||
3317 | read_lock_bh(&idev->lock); | |
502a2ffd | 3318 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3319 | spin_lock(&ifp->lock); |
f2344a13 HX |
3320 | if (ifp->flags & IFA_F_TENTATIVE && |
3321 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3322 | addrconf_dad_kick(ifp); | |
21809faf | 3323 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3324 | } |
3325 | read_unlock_bh(&idev->lock); | |
3326 | } | |
3327 | ||
1da177e4 LT |
3328 | #ifdef CONFIG_PROC_FS |
3329 | struct if6_iter_state { | |
3c40090a | 3330 | struct seq_net_private p; |
1da177e4 | 3331 | int bucket; |
1d578303 | 3332 | int offset; |
1da177e4 LT |
3333 | }; |
3334 | ||
1d578303 | 3335 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3336 | { |
3337 | struct inet6_ifaddr *ifa = NULL; | |
3338 | struct if6_iter_state *state = seq->private; | |
1218854a | 3339 | struct net *net = seq_file_net(seq); |
1d578303 | 3340 | int p = 0; |
1da177e4 | 3341 | |
1d578303 MM |
3342 | /* initial bucket if pos is 0 */ |
3343 | if (pos == 0) { | |
3344 | state->bucket = 0; | |
3345 | state->offset = 0; | |
3346 | } | |
3347 | ||
3348 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3349 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3350 | addr_lst) { |
9f0d3c27 ED |
3351 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3352 | continue; | |
1d578303 MM |
3353 | /* sync with offset */ |
3354 | if (p < state->offset) { | |
3355 | p++; | |
3356 | continue; | |
3357 | } | |
3358 | state->offset++; | |
9f0d3c27 | 3359 | return ifa; |
1d578303 MM |
3360 | } |
3361 | ||
3362 | /* prepare for next bucket */ | |
3363 | state->offset = 0; | |
3364 | p = 0; | |
1da177e4 | 3365 | } |
c2e21293 | 3366 | return NULL; |
1da177e4 LT |
3367 | } |
3368 | ||
c2e21293 | 3369 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3370 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3371 | { |
3372 | struct if6_iter_state *state = seq->private; | |
1218854a | 3373 | struct net *net = seq_file_net(seq); |
1da177e4 | 3374 | |
b67bfe0d | 3375 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3376 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3377 | continue; | |
1d578303 | 3378 | state->offset++; |
9f0d3c27 | 3379 | return ifa; |
1d578303 | 3380 | } |
3c40090a | 3381 | |
c2e21293 | 3382 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3383 | state->offset = 0; |
b67bfe0d | 3384 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3385 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3386 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3387 | continue; | |
1d578303 | 3388 | state->offset++; |
9f0d3c27 | 3389 | return ifa; |
c2e21293 | 3390 | } |
1da177e4 | 3391 | } |
3c40090a | 3392 | |
c2e21293 | 3393 | return NULL; |
1da177e4 LT |
3394 | } |
3395 | ||
1da177e4 | 3396 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3397 | __acquires(rcu_bh) |
1da177e4 | 3398 | { |
5c578aed | 3399 | rcu_read_lock_bh(); |
1d578303 | 3400 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3401 | } |
3402 | ||
3403 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3404 | { | |
3405 | struct inet6_ifaddr *ifa; | |
3406 | ||
3407 | ifa = if6_get_next(seq, v); | |
3408 | ++*pos; | |
3409 | return ifa; | |
3410 | } | |
3411 | ||
3412 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3413 | __releases(rcu_bh) |
1da177e4 | 3414 | { |
5c578aed | 3415 | rcu_read_unlock_bh(); |
1da177e4 LT |
3416 | } |
3417 | ||
3418 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3419 | { | |
3420 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3421 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3422 | &ifp->addr, |
1da177e4 LT |
3423 | ifp->idev->dev->ifindex, |
3424 | ifp->prefix_len, | |
3425 | ifp->scope, | |
3426 | ifp->flags, | |
3427 | ifp->idev->dev->name); | |
3428 | return 0; | |
3429 | } | |
3430 | ||
56b3d975 | 3431 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3432 | .start = if6_seq_start, |
3433 | .next = if6_seq_next, | |
3434 | .show = if6_seq_show, | |
3435 | .stop = if6_seq_stop, | |
3436 | }; | |
3437 | ||
3438 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3439 | { | |
3c40090a DL |
3440 | return seq_open_net(inode, file, &if6_seq_ops, |
3441 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3442 | } |
3443 | ||
9a32144e | 3444 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3445 | .owner = THIS_MODULE, |
3446 | .open = if6_seq_open, | |
3447 | .read = seq_read, | |
3448 | .llseek = seq_lseek, | |
3c40090a | 3449 | .release = seq_release_net, |
1da177e4 LT |
3450 | }; |
3451 | ||
2c8c1e72 | 3452 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3453 | { |
d4beaa66 | 3454 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3455 | return -ENOMEM; |
3456 | return 0; | |
3457 | } | |
3458 | ||
2c8c1e72 | 3459 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3460 | { |
ece31ffd | 3461 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3462 | } |
3463 | ||
3464 | static struct pernet_operations if6_proc_net_ops = { | |
3465 | .init = if6_proc_net_init, | |
3466 | .exit = if6_proc_net_exit, | |
3467 | }; | |
3468 | ||
3469 | int __init if6_proc_init(void) | |
3470 | { | |
3471 | return register_pernet_subsys(&if6_proc_net_ops); | |
3472 | } | |
3473 | ||
1da177e4 LT |
3474 | void if6_proc_exit(void) |
3475 | { | |
3c40090a | 3476 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3477 | } |
3478 | #endif /* CONFIG_PROC_FS */ | |
3479 | ||
07a93626 | 3480 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3481 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3482 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3483 | { |
3484 | int ret = 0; | |
c2e21293 | 3485 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3486 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3487 | |
5c578aed | 3488 | rcu_read_lock_bh(); |
b67bfe0d | 3489 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3490 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3491 | continue; |
caad295f | 3492 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3493 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3494 | ret = 1; | |
3495 | break; | |
3496 | } | |
3497 | } | |
5c578aed | 3498 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3499 | return ret; |
3500 | } | |
3501 | #endif | |
3502 | ||
1da177e4 LT |
3503 | /* |
3504 | * Periodic address status verification | |
3505 | */ | |
3506 | ||
3507 | static void addrconf_verify(unsigned long foo) | |
3508 | { | |
b2db7564 | 3509 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3510 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3511 | int i; |
3512 | ||
5c578aed | 3513 | rcu_read_lock_bh(); |
3514 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3515 | now = jiffies; |
b2db7564 | 3516 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3517 | |
3518 | del_timer(&addr_chk_timer); | |
3519 | ||
bcdd553f | 3520 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3521 | restart: |
b67bfe0d | 3522 | hlist_for_each_entry_rcu_bh(ifp, |
5c578aed | 3523 | &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3524 | unsigned long age; |
1da177e4 LT |
3525 | |
3526 | if (ifp->flags & IFA_F_PERMANENT) | |
3527 | continue; | |
3528 | ||
3529 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3530 | /* We try to batch several events at once. */ |
3531 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3532 | |
8f27ebb9 YH |
3533 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3534 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3535 | spin_unlock(&ifp->lock); |
3536 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3537 | ipv6_del_addr(ifp); |
3538 | goto restart; | |
8f27ebb9 YH |
3539 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3540 | spin_unlock(&ifp->lock); | |
3541 | continue; | |
1da177e4 | 3542 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3543 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3544 | int deprecate = 0; |
3545 | ||
3546 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3547 | deprecate = 1; | |
3548 | ifp->flags |= IFA_F_DEPRECATED; | |
3549 | } | |
3550 | ||
3551 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3552 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3553 | ||
3554 | spin_unlock(&ifp->lock); | |
3555 | ||
3556 | if (deprecate) { | |
3557 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3558 | |
3559 | ipv6_ifa_notify(0, ifp); | |
3560 | in6_ifa_put(ifp); | |
3561 | goto restart; | |
3562 | } | |
3563 | #ifdef CONFIG_IPV6_PRIVACY | |
3564 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3565 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3566 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3567 | ifp->idev->cnf.dad_transmits * | |
3568 | ifp->idev->nd_parms->retrans_time / HZ; | |
3569 | ||
1da177e4 LT |
3570 | if (age >= ifp->prefered_lft - regen_advance) { |
3571 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3572 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3573 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3574 | if (!ifp->regen_count && ifpub) { | |
3575 | ifp->regen_count++; | |
3576 | in6_ifa_hold(ifp); | |
3577 | in6_ifa_hold(ifpub); | |
3578 | spin_unlock(&ifp->lock); | |
5c578aed | 3579 | |
291d809b HY |
3580 | spin_lock(&ifpub->lock); |
3581 | ifpub->regen_count = 0; | |
3582 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3583 | ipv6_create_tempaddr(ifpub, ifp); |
3584 | in6_ifa_put(ifpub); | |
3585 | in6_ifa_put(ifp); | |
3586 | goto restart; | |
3587 | } | |
3588 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3589 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3590 | spin_unlock(&ifp->lock); | |
3591 | #endif | |
3592 | } else { | |
3593 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3594 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3595 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3596 | spin_unlock(&ifp->lock); | |
3597 | } | |
3598 | } | |
1da177e4 LT |
3599 | } |
3600 | ||
b2db7564 YH |
3601 | next_sec = round_jiffies_up(next); |
3602 | next_sched = next; | |
3603 | ||
3604 | /* If rounded timeout is accurate enough, accept it. */ | |
3605 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3606 | next_sched = next_sec; | |
3607 | ||
3608 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3609 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3610 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3611 | ||
ba3542e1 | 3612 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
3613 | now, next, next_sec, next_sched); | |
b2db7564 YH |
3614 | |
3615 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3616 | add_timer(&addr_chk_timer); |
5c578aed | 3617 | spin_unlock(&addrconf_verify_lock); |
3618 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3619 | } |
3620 | ||
caeaba79 ND |
3621 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
3622 | struct in6_addr **peer_pfx) | |
461d8837 TG |
3623 | { |
3624 | struct in6_addr *pfx = NULL; | |
3625 | ||
caeaba79 ND |
3626 | *peer_pfx = NULL; |
3627 | ||
461d8837 TG |
3628 | if (addr) |
3629 | pfx = nla_data(addr); | |
3630 | ||
3631 | if (local) { | |
3632 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
3633 | *peer_pfx = pfx; |
3634 | pfx = nla_data(local); | |
461d8837 TG |
3635 | } |
3636 | ||
3637 | return pfx; | |
3638 | } | |
3639 | ||
ef7c79ed | 3640 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3641 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3642 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3643 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3644 | }; | |
3645 | ||
1da177e4 | 3646 | static int |
661d2967 | 3647 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3648 | { |
3b1e0a65 | 3649 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3650 | struct ifaddrmsg *ifm; |
3651 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3652 | struct in6_addr *pfx, *peer_pfx; |
b933f716 | 3653 | int err; |
1da177e4 | 3654 | |
b933f716 TG |
3655 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3656 | if (err < 0) | |
3657 | return err; | |
3658 | ||
3659 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3660 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3661 | if (pfx == NULL) |
3662 | return -EINVAL; | |
3663 | ||
af284937 | 3664 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3665 | } |
3666 | ||
55ebaef1 NT |
3667 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3668 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3669 | { |
6f704992 YH |
3670 | u32 flags; |
3671 | clock_t expires; | |
4bed72e4 | 3672 | unsigned long timeout; |
46d48046 | 3673 | |
081bba5b NT |
3674 | if (!valid_lft || (prefered_lft > valid_lft)) |
3675 | return -EINVAL; | |
3676 | ||
4bed72e4 YH |
3677 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3678 | if (addrconf_finite_timeout(timeout)) { | |
3679 | expires = jiffies_to_clock_t(timeout * HZ); | |
3680 | valid_lft = timeout; | |
6f704992 | 3681 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3682 | } else { |
3683 | expires = 0; | |
3684 | flags = 0; | |
3685 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3686 | } |
081bba5b | 3687 | |
4bed72e4 YH |
3688 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3689 | if (addrconf_finite_timeout(timeout)) { | |
3690 | if (timeout == 0) | |
3691 | ifa_flags |= IFA_F_DEPRECATED; | |
3692 | prefered_lft = timeout; | |
3693 | } | |
081bba5b NT |
3694 | |
3695 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3696 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3697 | ifp->tstamp = jiffies; |
3698 | ifp->valid_lft = valid_lft; | |
3699 | ifp->prefered_lft = prefered_lft; | |
3700 | ||
3701 | spin_unlock_bh(&ifp->lock); | |
3702 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3703 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3704 | |
46d48046 | 3705 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3706 | expires, flags); |
081bba5b NT |
3707 | addrconf_verify(0); |
3708 | ||
3709 | return 0; | |
3710 | } | |
3711 | ||
1da177e4 | 3712 | static int |
661d2967 | 3713 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3714 | { |
3b1e0a65 | 3715 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3716 | struct ifaddrmsg *ifm; |
3717 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3718 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
3719 | struct inet6_ifaddr *ifa; |
3720 | struct net_device *dev; | |
55ebaef1 NT |
3721 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3722 | u8 ifa_flags; | |
461d8837 | 3723 | int err; |
1da177e4 | 3724 | |
461d8837 TG |
3725 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3726 | if (err < 0) | |
3727 | return err; | |
3728 | ||
3729 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3730 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3731 | if (pfx == NULL) |
3732 | return -EINVAL; | |
3733 | ||
461d8837 | 3734 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3735 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3736 | |
3737 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3738 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3739 | preferred_lft = ci->ifa_prefered; |
3740 | } else { | |
3741 | preferred_lft = INFINITY_LIFE_TIME; | |
3742 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3743 | } |
3744 | ||
af284937 | 3745 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3746 | if (dev == NULL) |
3747 | return -ENODEV; | |
3748 | ||
55ebaef1 | 3749 | /* We ignore other flags so far. */ |
3b9f9a1c | 3750 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3751 | |
1cab3da6 | 3752 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3753 | if (ifa == NULL) { |
3754 | /* | |
3755 | * It would be best to check for !NLM_F_CREATE here but | |
3756 | * userspace alreay relies on not having to provide this. | |
3757 | */ | |
caeaba79 | 3758 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
3759 | ifm->ifa_prefixlen, ifa_flags, |
3760 | preferred_lft, valid_lft); | |
081bba5b NT |
3761 | } |
3762 | ||
7198f8ce TG |
3763 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3764 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3765 | err = -EEXIST; | |
3766 | else | |
55ebaef1 | 3767 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3768 | |
3769 | in6_ifa_put(ifa); | |
3770 | ||
3771 | return err; | |
1da177e4 LT |
3772 | } |
3773 | ||
101bb229 TG |
3774 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3775 | u8 scope, int ifindex) | |
3776 | { | |
3777 | struct ifaddrmsg *ifm; | |
3778 | ||
3779 | ifm = nlmsg_data(nlh); | |
3780 | ifm->ifa_family = AF_INET6; | |
3781 | ifm->ifa_prefixlen = prefixlen; | |
3782 | ifm->ifa_flags = flags; | |
3783 | ifm->ifa_scope = scope; | |
3784 | ifm->ifa_index = ifindex; | |
3785 | } | |
3786 | ||
85486af0 TG |
3787 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3788 | unsigned long tstamp, u32 preferred, u32 valid) | |
3789 | { | |
3790 | struct ifa_cacheinfo ci; | |
3791 | ||
18a31e1e TG |
3792 | ci.cstamp = cstamp_delta(cstamp); |
3793 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3794 | ci.ifa_prefered = preferred; |
3795 | ci.ifa_valid = valid; | |
3796 | ||
3797 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3798 | } | |
3799 | ||
101bb229 TG |
3800 | static inline int rt_scope(int ifa_scope) |
3801 | { | |
3802 | if (ifa_scope & IFA_HOST) | |
3803 | return RT_SCOPE_HOST; | |
3804 | else if (ifa_scope & IFA_LINK) | |
3805 | return RT_SCOPE_LINK; | |
3806 | else if (ifa_scope & IFA_SITE) | |
3807 | return RT_SCOPE_SITE; | |
3808 | else | |
3809 | return RT_SCOPE_UNIVERSE; | |
3810 | } | |
3811 | ||
0ab6803b TG |
3812 | static inline int inet6_ifaddr_msgsize(void) |
3813 | { | |
339bf98f | 3814 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 3815 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f TG |
3816 | + nla_total_size(16) /* IFA_ADDRESS */ |
3817 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3818 | } |
c5396a31 | 3819 | |
1da177e4 | 3820 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 3821 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3822 | { |
1da177e4 | 3823 | struct nlmsghdr *nlh; |
85486af0 | 3824 | u32 preferred, valid; |
1da177e4 | 3825 | |
15e47304 | 3826 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3827 | if (nlh == NULL) |
26932566 | 3828 | return -EMSGSIZE; |
0ab6803b | 3829 | |
101bb229 TG |
3830 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3831 | ifa->idev->dev->ifindex); | |
3832 | ||
1da177e4 | 3833 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3834 | preferred = ifa->prefered_lft; |
3835 | valid = ifa->valid_lft; | |
3836 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3837 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3838 | if (preferred > tval) |
3839 | preferred -= tval; | |
3840 | else | |
3841 | preferred = 0; | |
f56619fc BH |
3842 | if (valid != INFINITY_LIFE_TIME) { |
3843 | if (valid > tval) | |
3844 | valid -= tval; | |
3845 | else | |
3846 | valid = 0; | |
3847 | } | |
1da177e4 LT |
3848 | } |
3849 | } else { | |
85486af0 TG |
3850 | preferred = INFINITY_LIFE_TIME; |
3851 | valid = INFINITY_LIFE_TIME; | |
3852 | } | |
3853 | ||
7996c799 | 3854 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
caeaba79 ND |
3855 | if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 || |
3856 | nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0) | |
3857 | goto error; | |
3858 | } else | |
3859 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0) | |
3860 | goto error; | |
3861 | ||
3862 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
3863 | goto error; | |
1da177e4 | 3864 | |
0ab6803b | 3865 | return nlmsg_end(skb, nlh); |
caeaba79 ND |
3866 | |
3867 | error: | |
3868 | nlmsg_cancel(skb, nlh); | |
3869 | return -EMSGSIZE; | |
1da177e4 LT |
3870 | } |
3871 | ||
3872 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 3873 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 3874 | { |
1da177e4 | 3875 | struct nlmsghdr *nlh; |
101bb229 TG |
3876 | u8 scope = RT_SCOPE_UNIVERSE; |
3877 | int ifindex = ifmca->idev->dev->ifindex; | |
3878 | ||
3879 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3880 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3881 | |
15e47304 | 3882 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3883 | if (nlh == NULL) |
26932566 | 3884 | return -EMSGSIZE; |
85486af0 | 3885 | |
0ab6803b TG |
3886 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3887 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3888 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3889 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3890 | nlmsg_cancel(skb, nlh); | |
3891 | return -EMSGSIZE; | |
3892 | } | |
85486af0 | 3893 | |
0ab6803b | 3894 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3895 | } |
3896 | ||
3897 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 3898 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3899 | { |
1da177e4 | 3900 | struct nlmsghdr *nlh; |
101bb229 TG |
3901 | u8 scope = RT_SCOPE_UNIVERSE; |
3902 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3903 | ||
3904 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3905 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3906 | |
15e47304 | 3907 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3908 | if (nlh == NULL) |
26932566 | 3909 | return -EMSGSIZE; |
85486af0 | 3910 | |
0ab6803b TG |
3911 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3912 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3913 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3914 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3915 | nlmsg_cancel(skb, nlh); | |
3916 | return -EMSGSIZE; | |
3917 | } | |
1da177e4 | 3918 | |
0ab6803b | 3919 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3920 | } |
3921 | ||
e21e8467 | 3922 | enum addr_type_t { |
1da177e4 LT |
3923 | UNICAST_ADDR, |
3924 | MULTICAST_ADDR, | |
3925 | ANYCAST_ADDR, | |
3926 | }; | |
3927 | ||
234b27c3 ED |
3928 | /* called with rcu_read_lock() */ |
3929 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3930 | struct netlink_callback *cb, enum addr_type_t type, | |
3931 | int s_ip_idx, int *p_ip_idx) | |
3932 | { | |
234b27c3 ED |
3933 | struct ifmcaddr6 *ifmca; |
3934 | struct ifacaddr6 *ifaca; | |
3935 | int err = 1; | |
3936 | int ip_idx = *p_ip_idx; | |
3937 | ||
3938 | read_lock_bh(&idev->lock); | |
3939 | switch (type) { | |
502a2ffd | 3940 | case UNICAST_ADDR: { |
3941 | struct inet6_ifaddr *ifa; | |
3942 | ||
234b27c3 | 3943 | /* unicast address incl. temp addr */ |
502a2ffd | 3944 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3945 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3946 | continue; |
3947 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 3948 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3949 | cb->nlh->nlmsg_seq, |
3950 | RTM_NEWADDR, | |
3951 | NLM_F_MULTI); | |
3952 | if (err <= 0) | |
3953 | break; | |
63998ac2 | 3954 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
3955 | } |
3956 | break; | |
502a2ffd | 3957 | } |
234b27c3 ED |
3958 | case MULTICAST_ADDR: |
3959 | /* multicast address */ | |
3960 | for (ifmca = idev->mc_list; ifmca; | |
3961 | ifmca = ifmca->next, ip_idx++) { | |
3962 | if (ip_idx < s_ip_idx) | |
3963 | continue; | |
3964 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 3965 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3966 | cb->nlh->nlmsg_seq, |
3967 | RTM_GETMULTICAST, | |
3968 | NLM_F_MULTI); | |
3969 | if (err <= 0) | |
3970 | break; | |
3971 | } | |
3972 | break; | |
3973 | case ANYCAST_ADDR: | |
3974 | /* anycast address */ | |
3975 | for (ifaca = idev->ac_list; ifaca; | |
3976 | ifaca = ifaca->aca_next, ip_idx++) { | |
3977 | if (ip_idx < s_ip_idx) | |
3978 | continue; | |
3979 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 3980 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3981 | cb->nlh->nlmsg_seq, |
3982 | RTM_GETANYCAST, | |
3983 | NLM_F_MULTI); | |
3984 | if (err <= 0) | |
3985 | break; | |
3986 | } | |
3987 | break; | |
3988 | default: | |
3989 | break; | |
3990 | } | |
3991 | read_unlock_bh(&idev->lock); | |
3992 | *p_ip_idx = ip_idx; | |
3993 | return err; | |
3994 | } | |
3995 | ||
1da177e4 LT |
3996 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3997 | enum addr_type_t type) | |
3998 | { | |
234b27c3 ED |
3999 | struct net *net = sock_net(skb->sk); |
4000 | int h, s_h; | |
1da177e4 LT |
4001 | int idx, ip_idx; |
4002 | int s_idx, s_ip_idx; | |
1da177e4 | 4003 | struct net_device *dev; |
234b27c3 ED |
4004 | struct inet6_dev *idev; |
4005 | struct hlist_head *head; | |
1ab1457c | 4006 | |
234b27c3 ED |
4007 | s_h = cb->args[0]; |
4008 | s_idx = idx = cb->args[1]; | |
4009 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4010 | |
234b27c3 | 4011 | rcu_read_lock(); |
63998ac2 | 4012 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4013 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4014 | idx = 0; | |
4015 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4016 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4017 | if (idx < s_idx) |
4018 | goto cont; | |
4b97efdf | 4019 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4020 | s_ip_idx = 0; |
4021 | ip_idx = 0; | |
e21e8467 SH |
4022 | idev = __in6_dev_get(dev); |
4023 | if (!idev) | |
234b27c3 ED |
4024 | goto cont; |
4025 | ||
4026 | if (in6_dump_addrs(idev, skb, cb, type, | |
4027 | s_ip_idx, &ip_idx) <= 0) | |
4028 | goto done; | |
7562f876 | 4029 | cont: |
234b27c3 ED |
4030 | idx++; |
4031 | } | |
1da177e4 | 4032 | } |
234b27c3 ED |
4033 | done: |
4034 | rcu_read_unlock(); | |
4035 | cb->args[0] = h; | |
4036 | cb->args[1] = idx; | |
4037 | cb->args[2] = ip_idx; | |
4038 | ||
1da177e4 LT |
4039 | return skb->len; |
4040 | } | |
4041 | ||
4042 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4043 | { | |
4044 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4045 | |
1da177e4 LT |
4046 | return inet6_dump_addr(skb, cb, type); |
4047 | } | |
4048 | ||
4049 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4050 | { | |
4051 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4052 | |
1da177e4 LT |
4053 | return inet6_dump_addr(skb, cb, type); |
4054 | } | |
4055 | ||
4056 | ||
4057 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4058 | { | |
4059 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4060 | |
1da177e4 LT |
4061 | return inet6_dump_addr(skb, cb, type); |
4062 | } | |
4063 | ||
661d2967 | 4064 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4065 | { |
3b1e0a65 | 4066 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4067 | struct ifaddrmsg *ifm; |
4068 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4069 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4070 | struct net_device *dev = NULL; |
4071 | struct inet6_ifaddr *ifa; | |
4072 | struct sk_buff *skb; | |
6c223828 NT |
4073 | int err; |
4074 | ||
1b29fc2c TG |
4075 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4076 | if (err < 0) | |
4077 | goto errout; | |
4078 | ||
caeaba79 | 4079 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
1b29fc2c TG |
4080 | if (addr == NULL) { |
4081 | err = -EINVAL; | |
4082 | goto errout; | |
6c223828 | 4083 | } |
6c223828 | 4084 | |
1b29fc2c | 4085 | ifm = nlmsg_data(nlh); |
6c223828 | 4086 | if (ifm->ifa_index) |
6fda7350 | 4087 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4088 | |
e21e8467 SH |
4089 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4090 | if (!ifa) { | |
1b29fc2c TG |
4091 | err = -EADDRNOTAVAIL; |
4092 | goto errout; | |
4093 | } | |
6c223828 | 4094 | |
e21e8467 SH |
4095 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4096 | if (!skb) { | |
6c223828 | 4097 | err = -ENOBUFS; |
1b29fc2c | 4098 | goto errout_ifa; |
6c223828 NT |
4099 | } |
4100 | ||
15e47304 | 4101 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4102 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4103 | if (err < 0) { |
4104 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4105 | WARN_ON(err == -EMSGSIZE); | |
4106 | kfree_skb(skb); | |
4107 | goto errout_ifa; | |
4108 | } | |
15e47304 | 4109 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4110 | errout_ifa: |
6c223828 | 4111 | in6_ifa_put(ifa); |
1b29fc2c | 4112 | errout: |
6c223828 | 4113 | return err; |
6c223828 NT |
4114 | } |
4115 | ||
1da177e4 LT |
4116 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4117 | { | |
4118 | struct sk_buff *skb; | |
c346dca1 | 4119 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4120 | int err = -ENOBUFS; |
1da177e4 | 4121 | |
0ab6803b | 4122 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
4123 | if (skb == NULL) |
4124 | goto errout; | |
4125 | ||
4126 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4127 | if (err < 0) { |
4128 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4129 | WARN_ON(err == -EMSGSIZE); | |
4130 | kfree_skb(skb); | |
4131 | goto errout; | |
4132 | } | |
1ce85fe4 PNA |
4133 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4134 | return; | |
5d620266 TG |
4135 | errout: |
4136 | if (err < 0) | |
6fda7350 | 4137 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4138 | } |
4139 | ||
b6f99a21 | 4140 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4141 | __s32 *array, int bytes) |
4142 | { | |
04561c1f TG |
4143 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4144 | ||
1da177e4 LT |
4145 | memset(array, 0, bytes); |
4146 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4147 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4148 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4149 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4150 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4151 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4152 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4153 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4154 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4155 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4156 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4157 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4158 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4159 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4160 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4161 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4162 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4163 | #ifdef CONFIG_IPV6_PRIVACY |
4164 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
4165 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4166 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4167 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4168 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
4169 | #endif | |
4170 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 4171 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4172 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4173 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4174 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4175 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4176 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4177 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4178 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4179 | #endif | |
930d6ff2 | 4180 | #endif |
fbea49e1 | 4181 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4182 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4183 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4184 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
4185 | #endif | |
7bc570c8 YH |
4186 | #ifdef CONFIG_IPV6_MROUTE |
4187 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4188 | #endif | |
778d80be | 4189 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4190 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4191 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4192 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
1da177e4 LT |
4193 | } |
4194 | ||
b382b191 TG |
4195 | static inline size_t inet6_ifla6_size(void) |
4196 | { | |
4197 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4198 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4199 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4200 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4201 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4202 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4203 | } |
4204 | ||
339bf98f TG |
4205 | static inline size_t inet6_if_nlmsg_size(void) |
4206 | { | |
4207 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4208 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4209 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4210 | + nla_total_size(4) /* IFLA_MTU */ | |
4211 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4212 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4213 | } |
c5396a31 | 4214 | |
be281e55 | 4215 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4216 | int items, int bytes) |
7f7d9a6b HX |
4217 | { |
4218 | int i; | |
4219 | int pad = bytes - sizeof(u64) * items; | |
4220 | BUG_ON(pad < 0); | |
4221 | ||
4222 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4223 | put_unaligned(items, &stats[0]); | |
4224 | for (i = 1; i < items; i++) | |
be281e55 | 4225 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4226 | |
4227 | memset(&stats[items], 0, pad); | |
4228 | } | |
4229 | ||
4ce3c183 ED |
4230 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
4231 | int items, int bytes, size_t syncpoff) | |
4232 | { | |
4233 | int i; | |
4234 | int pad = bytes - sizeof(u64) * items; | |
4235 | BUG_ON(pad < 0); | |
4236 | ||
4237 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4238 | put_unaligned(items, &stats[0]); | |
4239 | for (i = 1; i < items; i++) | |
4240 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4241 | ||
4242 | memset(&stats[items], 0, pad); | |
4243 | } | |
4244 | ||
7f7d9a6b HX |
4245 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4246 | int bytes) | |
4247 | { | |
e21e8467 | 4248 | switch (attrtype) { |
7f7d9a6b | 4249 | case IFLA_INET6_STATS: |
4ce3c183 ED |
4250 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
4251 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4252 | break; |
4253 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4254 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4255 | break; |
4256 | } | |
4257 | } | |
4258 | ||
b382b191 TG |
4259 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4260 | { | |
4261 | struct nlattr *nla; | |
4262 | struct ifla_cacheinfo ci; | |
4263 | ||
c78679e8 DM |
4264 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4265 | goto nla_put_failure; | |
b382b191 | 4266 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4267 | ci.tstamp = cstamp_delta(idev->tstamp); |
4268 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
4269 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); | |
c78679e8 DM |
4270 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4271 | goto nla_put_failure; | |
b382b191 TG |
4272 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4273 | if (nla == NULL) | |
4274 | goto nla_put_failure; | |
4275 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4276 | ||
4277 | /* XXX - MC not implemented */ | |
4278 | ||
4279 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4280 | if (nla == NULL) | |
4281 | goto nla_put_failure; | |
4282 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4283 | ||
4284 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4285 | if (nla == NULL) | |
4286 | goto nla_put_failure; | |
4287 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4288 | ||
f53adae4 DB |
4289 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
4290 | if (nla == NULL) | |
4291 | goto nla_put_failure; | |
4292 | read_lock_bh(&idev->lock); | |
4293 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4294 | read_unlock_bh(&idev->lock); | |
4295 | ||
b382b191 TG |
4296 | return 0; |
4297 | ||
4298 | nla_put_failure: | |
4299 | return -EMSGSIZE; | |
4300 | } | |
4301 | ||
4302 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4303 | { | |
4304 | if (!__in6_dev_get(dev)) | |
4305 | return 0; | |
4306 | ||
4307 | return inet6_ifla6_size(); | |
4308 | } | |
4309 | ||
4310 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4311 | { | |
4312 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4313 | ||
4314 | if (!idev) | |
4315 | return -ENODATA; | |
4316 | ||
4317 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4318 | return -EMSGSIZE; | |
4319 | ||
4320 | return 0; | |
4321 | } | |
4322 | ||
f53adae4 DB |
4323 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4324 | { | |
f53adae4 DB |
4325 | struct inet6_ifaddr *ifp; |
4326 | struct net_device *dev = idev->dev; | |
fc403832 | 4327 | bool update_rs = false; |
dc848292 | 4328 | struct in6_addr ll_addr; |
f53adae4 DB |
4329 | |
4330 | if (token == NULL) | |
4331 | return -EINVAL; | |
4332 | if (ipv6_addr_any(token)) | |
4333 | return -EINVAL; | |
4334 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4335 | return -EINVAL; | |
f53adae4 DB |
4336 | if (!ipv6_accept_ra(idev)) |
4337 | return -EINVAL; | |
4338 | if (idev->cnf.rtr_solicits <= 0) | |
4339 | return -EINVAL; | |
4340 | ||
4341 | write_lock_bh(&idev->lock); | |
4342 | ||
4343 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4344 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4345 | ||
4346 | write_unlock_bh(&idev->lock); | |
4347 | ||
dc848292 HFS |
4348 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4349 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4350 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4351 | |
4352 | /* If we're not ready, then normal ifup will take care | |
4353 | * of this. Otherwise, we need to request our rs here. | |
4354 | */ | |
4355 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4356 | update_rs = true; | |
4357 | } | |
f53adae4 DB |
4358 | |
4359 | write_lock_bh(&idev->lock); | |
fc403832 | 4360 | |
77ecaace | 4361 | if (update_rs) { |
fc403832 | 4362 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4363 | idev->rs_probes = 1; |
4364 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4365 | } | |
f53adae4 DB |
4366 | |
4367 | /* Well, that's kinda nasty ... */ | |
4368 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4369 | spin_lock(&ifp->lock); | |
617fe29d | 4370 | if (ifp->tokenized) { |
f53adae4 DB |
4371 | ifp->valid_lft = 0; |
4372 | ifp->prefered_lft = 0; | |
4373 | } | |
4374 | spin_unlock(&ifp->lock); | |
4375 | } | |
4376 | ||
4377 | write_unlock_bh(&idev->lock); | |
2b9651d7 | 4378 | addrconf_verify(0); |
f53adae4 DB |
4379 | return 0; |
4380 | } | |
4381 | ||
4382 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
4383 | { | |
4384 | int err = -EINVAL; | |
4385 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4386 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4387 | ||
4388 | if (!idev) | |
4389 | return -EAFNOSUPPORT; | |
4390 | ||
4391 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4392 | BUG(); | |
4393 | ||
4394 | if (tb[IFLA_INET6_TOKEN]) | |
4395 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); | |
4396 | ||
4397 | return err; | |
4398 | } | |
4399 | ||
1ab1457c | 4400 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4401 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4402 | { |
04561c1f | 4403 | struct net_device *dev = idev->dev; |
04561c1f TG |
4404 | struct ifinfomsg *hdr; |
4405 | struct nlmsghdr *nlh; | |
4406 | void *protoinfo; | |
04561c1f | 4407 | |
15e47304 | 4408 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4409 | if (nlh == NULL) |
26932566 | 4410 | return -EMSGSIZE; |
04561c1f TG |
4411 | |
4412 | hdr = nlmsg_data(nlh); | |
4413 | hdr->ifi_family = AF_INET6; | |
4414 | hdr->__ifi_pad = 0; | |
4415 | hdr->ifi_type = dev->type; | |
4416 | hdr->ifi_index = dev->ifindex; | |
4417 | hdr->ifi_flags = dev_get_flags(dev); | |
4418 | hdr->ifi_change = 0; | |
4419 | ||
c78679e8 DM |
4420 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4421 | (dev->addr_len && | |
4422 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4423 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4424 | (dev->ifindex != dev->iflink && | |
4425 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4426 | goto nla_put_failure; | |
04561c1f TG |
4427 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4428 | if (protoinfo == NULL) | |
4429 | goto nla_put_failure; | |
1da177e4 | 4430 | |
b382b191 | 4431 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4432 | goto nla_put_failure; |
1da177e4 | 4433 | |
04561c1f TG |
4434 | nla_nest_end(skb, protoinfo); |
4435 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4436 | |
04561c1f | 4437 | nla_put_failure: |
26932566 PM |
4438 | nlmsg_cancel(skb, nlh); |
4439 | return -EMSGSIZE; | |
1da177e4 LT |
4440 | } |
4441 | ||
4442 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4443 | { | |
3b1e0a65 | 4444 | struct net *net = sock_net(skb->sk); |
84d2697d | 4445 | int h, s_h; |
434a8a58 | 4446 | int idx = 0, s_idx; |
1da177e4 LT |
4447 | struct net_device *dev; |
4448 | struct inet6_dev *idev; | |
84d2697d | 4449 | struct hlist_head *head; |
1da177e4 | 4450 | |
84d2697d ED |
4451 | s_h = cb->args[0]; |
4452 | s_idx = cb->args[1]; | |
4453 | ||
4454 | rcu_read_lock(); | |
4455 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4456 | idx = 0; | |
4457 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4458 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4459 | if (idx < s_idx) |
4460 | goto cont; | |
4461 | idev = __in6_dev_get(dev); | |
4462 | if (!idev) | |
4463 | goto cont; | |
4464 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4465 | NETLINK_CB(cb->skb).portid, |
84d2697d ED |
4466 | cb->nlh->nlmsg_seq, |
4467 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4468 | goto out; | |
7562f876 | 4469 | cont: |
84d2697d ED |
4470 | idx++; |
4471 | } | |
1da177e4 | 4472 | } |
84d2697d ED |
4473 | out: |
4474 | rcu_read_unlock(); | |
4475 | cb->args[1] = idx; | |
4476 | cb->args[0] = h; | |
1da177e4 LT |
4477 | |
4478 | return skb->len; | |
4479 | } | |
4480 | ||
4481 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4482 | { | |
4483 | struct sk_buff *skb; | |
c346dca1 | 4484 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4485 | int err = -ENOBUFS; |
1ab1457c | 4486 | |
339bf98f | 4487 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4488 | if (skb == NULL) |
4489 | goto errout; | |
4490 | ||
4491 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4492 | if (err < 0) { |
4493 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4494 | WARN_ON(err == -EMSGSIZE); | |
4495 | kfree_skb(skb); | |
4496 | goto errout; | |
4497 | } | |
5f75a104 | 4498 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4499 | return; |
8d7a76c9 TG |
4500 | errout: |
4501 | if (err < 0) | |
5f75a104 | 4502 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4503 | } |
4504 | ||
339bf98f TG |
4505 | static inline size_t inet6_prefix_nlmsg_size(void) |
4506 | { | |
4507 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4508 | + nla_total_size(sizeof(struct in6_addr)) | |
4509 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4510 | } | |
c5396a31 | 4511 | |
1da177e4 | 4512 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4513 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4514 | int event, unsigned int flags) |
1da177e4 | 4515 | { |
6051e2f4 TG |
4516 | struct prefixmsg *pmsg; |
4517 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4518 | struct prefix_cacheinfo ci; |
4519 | ||
15e47304 | 4520 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4521 | if (nlh == NULL) |
26932566 | 4522 | return -EMSGSIZE; |
6051e2f4 TG |
4523 | |
4524 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4525 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4526 | pmsg->prefix_pad1 = 0; |
4527 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4528 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4529 | pmsg->prefix_len = pinfo->prefix_len; | |
4530 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4531 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4532 | pmsg->prefix_flags = 0; |
4533 | if (pinfo->onlink) | |
4534 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4535 | if (pinfo->autoconf) | |
4536 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4537 | ||
c78679e8 DM |
4538 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4539 | goto nla_put_failure; | |
1da177e4 LT |
4540 | ci.preferred_time = ntohl(pinfo->prefered); |
4541 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4542 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4543 | goto nla_put_failure; | |
6051e2f4 | 4544 | return nlmsg_end(skb, nlh); |
1da177e4 | 4545 | |
6051e2f4 | 4546 | nla_put_failure: |
26932566 PM |
4547 | nlmsg_cancel(skb, nlh); |
4548 | return -EMSGSIZE; | |
1da177e4 LT |
4549 | } |
4550 | ||
1ab1457c | 4551 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4552 | struct prefix_info *pinfo) |
4553 | { | |
4554 | struct sk_buff *skb; | |
c346dca1 | 4555 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4556 | int err = -ENOBUFS; |
1da177e4 | 4557 | |
339bf98f | 4558 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4559 | if (skb == NULL) |
4560 | goto errout; | |
4561 | ||
4562 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4563 | if (err < 0) { |
4564 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4565 | WARN_ON(err == -EMSGSIZE); | |
4566 | kfree_skb(skb); | |
4567 | goto errout; | |
4568 | } | |
1ce85fe4 PNA |
4569 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4570 | return; | |
8c384bfa TG |
4571 | errout: |
4572 | if (err < 0) | |
6fda7350 | 4573 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4574 | } |
4575 | ||
1ec047eb HFS |
4576 | static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count) |
4577 | { | |
4578 | write_lock_bh(&ifp->idev->lock); | |
4579 | spin_lock(&ifp->lock); | |
4580 | if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC| | |
4581 | IFA_F_DADFAILED)) == IFA_F_PERMANENT) && | |
4582 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) | |
4583 | ifp->idev->valid_ll_addr_cnt += count; | |
4584 | WARN_ON(ifp->idev->valid_ll_addr_cnt < 0); | |
4585 | spin_unlock(&ifp->lock); | |
4586 | write_unlock_bh(&ifp->idev->lock); | |
4587 | } | |
4588 | ||
1da177e4 LT |
4589 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4590 | { | |
63998ac2 ND |
4591 | struct net *net = dev_net(ifp->idev->dev); |
4592 | ||
1da177e4 LT |
4593 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
4594 | ||
4595 | switch (event) { | |
4596 | case RTM_NEWADDR: | |
1ec047eb HFS |
4597 | update_valid_ll_addr_cnt(ifp, 1); |
4598 | ||
95c385b4 NH |
4599 | /* |
4600 | * If the address was optimistic | |
4601 | * we inserted the route at the start of | |
4602 | * our DAD process, so we don't need | |
4603 | * to do it again | |
4604 | */ | |
4605 | if (!(ifp->rt->rt6i_node)) | |
4606 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4607 | if (ifp->idev->cnf.forwarding) |
4608 | addrconf_join_anycast(ifp); | |
7996c799 | 4609 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
4610 | addrconf_prefix_route(&ifp->peer_addr, 128, |
4611 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
4612 | break; |
4613 | case RTM_DELADDR: | |
1ec047eb HFS |
4614 | update_valid_ll_addr_cnt(ifp, -1); |
4615 | ||
1da177e4 LT |
4616 | if (ifp->idev->cnf.forwarding) |
4617 | addrconf_leave_anycast(ifp); | |
4618 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 4619 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 ND |
4620 | struct rt6_info *rt; |
4621 | struct net_device *dev = ifp->idev->dev; | |
4622 | ||
4623 | rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL, | |
4624 | dev->ifindex, 1); | |
4625 | if (rt) { | |
4626 | dst_hold(&rt->dst); | |
4627 | if (ip6_del_rt(rt)) | |
4628 | dst_free(&rt->dst); | |
4629 | } | |
4630 | } | |
d8d1f30b | 4631 | dst_hold(&ifp->rt->dst); |
93fa159a | 4632 | |
73a8bd74 | 4633 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4634 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4635 | break; |
4636 | } | |
63998ac2 | 4637 | atomic_inc(&net->ipv6.dev_addr_genid); |
439677d7 | 4638 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
4639 | } |
4640 | ||
4641 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4642 | { | |
8814c4b5 | 4643 | rcu_read_lock_bh(); |
1da177e4 LT |
4644 | if (likely(ifp->idev->dead == 0)) |
4645 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4646 | rcu_read_unlock_bh(); |
1da177e4 LT |
4647 | } |
4648 | ||
4649 | #ifdef CONFIG_SYSCTL | |
4650 | ||
4651 | static | |
fe2c6338 | 4652 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
4653 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4654 | { | |
4655 | int *valp = ctl->data; | |
4656 | int val = *valp; | |
88af182e | 4657 | loff_t pos = *ppos; |
fe2c6338 | 4658 | struct ctl_table lctl; |
1da177e4 LT |
4659 | int ret; |
4660 | ||
013d97e9 FR |
4661 | /* |
4662 | * ctl->data points to idev->cnf.forwarding, we should | |
4663 | * not modify it until we get the rtnl lock. | |
4664 | */ | |
4665 | lctl = *ctl; | |
4666 | lctl.data = &val; | |
4667 | ||
4668 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4669 | |
c8fecf22 | 4670 | if (write) |
b325fddb | 4671 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4672 | if (ret) |
4673 | *ppos = pos; | |
1ab1457c | 4674 | return ret; |
1da177e4 LT |
4675 | } |
4676 | ||
56d417b1 BH |
4677 | static void dev_disable_change(struct inet6_dev *idev) |
4678 | { | |
75538c2b CW |
4679 | struct netdev_notifier_info info; |
4680 | ||
56d417b1 BH |
4681 | if (!idev || !idev->dev) |
4682 | return; | |
4683 | ||
75538c2b | 4684 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 4685 | if (idev->cnf.disable_ipv6) |
75538c2b | 4686 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 4687 | else |
75538c2b | 4688 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
4689 | } |
4690 | ||
4691 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4692 | { | |
4693 | struct net_device *dev; | |
4694 | struct inet6_dev *idev; | |
4695 | ||
c6d14c84 ED |
4696 | rcu_read_lock(); |
4697 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4698 | idev = __in6_dev_get(dev); |
4699 | if (idev) { | |
4700 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4701 | idev->cnf.disable_ipv6 = newf; | |
4702 | if (changed) | |
4703 | dev_disable_change(idev); | |
4704 | } | |
56d417b1 | 4705 | } |
c6d14c84 | 4706 | rcu_read_unlock(); |
56d417b1 BH |
4707 | } |
4708 | ||
013d97e9 | 4709 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4710 | { |
4711 | struct net *net; | |
013d97e9 FR |
4712 | int old; |
4713 | ||
4714 | if (!rtnl_trylock()) | |
4715 | return restart_syscall(); | |
56d417b1 BH |
4716 | |
4717 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4718 | old = *p; |
4719 | *p = newf; | |
56d417b1 | 4720 | |
013d97e9 FR |
4721 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4722 | rtnl_unlock(); | |
56d417b1 | 4723 | return 0; |
88af182e | 4724 | } |
56d417b1 BH |
4725 | |
4726 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4727 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4728 | addrconf_disable_change(net, newf); | |
013d97e9 | 4729 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4730 | dev_disable_change((struct inet6_dev *)table->extra1); |
4731 | ||
4732 | rtnl_unlock(); | |
4733 | return 0; | |
4734 | } | |
4735 | ||
4736 | static | |
fe2c6338 | 4737 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
4738 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4739 | { | |
4740 | int *valp = ctl->data; | |
4741 | int val = *valp; | |
88af182e | 4742 | loff_t pos = *ppos; |
fe2c6338 | 4743 | struct ctl_table lctl; |
56d417b1 BH |
4744 | int ret; |
4745 | ||
013d97e9 FR |
4746 | /* |
4747 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4748 | * not modify it until we get the rtnl lock. | |
4749 | */ | |
4750 | lctl = *ctl; | |
4751 | lctl.data = &val; | |
4752 | ||
4753 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4754 | |
4755 | if (write) | |
4756 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4757 | if (ret) |
4758 | *ppos = pos; | |
56d417b1 BH |
4759 | return ret; |
4760 | } | |
4761 | ||
1da177e4 LT |
4762 | static struct addrconf_sysctl_table |
4763 | { | |
4764 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 4765 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4766 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4767 | .sysctl_header = NULL, |
4768 | .addrconf_vars = { | |
1ab1457c | 4769 | { |
e21e8467 SH |
4770 | .procname = "forwarding", |
4771 | .data = &ipv6_devconf.forwarding, | |
4772 | .maxlen = sizeof(int), | |
4773 | .mode = 0644, | |
4774 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4775 | }, |
4776 | { | |
e21e8467 SH |
4777 | .procname = "hop_limit", |
4778 | .data = &ipv6_devconf.hop_limit, | |
4779 | .maxlen = sizeof(int), | |
4780 | .mode = 0644, | |
4781 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4782 | }, |
4783 | { | |
e21e8467 SH |
4784 | .procname = "mtu", |
4785 | .data = &ipv6_devconf.mtu6, | |
4786 | .maxlen = sizeof(int), | |
4787 | .mode = 0644, | |
4788 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4789 | }, |
4790 | { | |
e21e8467 SH |
4791 | .procname = "accept_ra", |
4792 | .data = &ipv6_devconf.accept_ra, | |
4793 | .maxlen = sizeof(int), | |
4794 | .mode = 0644, | |
4795 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4796 | }, |
4797 | { | |
e21e8467 SH |
4798 | .procname = "accept_redirects", |
4799 | .data = &ipv6_devconf.accept_redirects, | |
4800 | .maxlen = sizeof(int), | |
4801 | .mode = 0644, | |
4802 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4803 | }, |
4804 | { | |
e21e8467 SH |
4805 | .procname = "autoconf", |
4806 | .data = &ipv6_devconf.autoconf, | |
4807 | .maxlen = sizeof(int), | |
4808 | .mode = 0644, | |
4809 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4810 | }, |
4811 | { | |
e21e8467 SH |
4812 | .procname = "dad_transmits", |
4813 | .data = &ipv6_devconf.dad_transmits, | |
4814 | .maxlen = sizeof(int), | |
4815 | .mode = 0644, | |
4816 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4817 | }, |
4818 | { | |
e21e8467 SH |
4819 | .procname = "router_solicitations", |
4820 | .data = &ipv6_devconf.rtr_solicits, | |
4821 | .maxlen = sizeof(int), | |
4822 | .mode = 0644, | |
4823 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4824 | }, |
4825 | { | |
e21e8467 SH |
4826 | .procname = "router_solicitation_interval", |
4827 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4828 | .maxlen = sizeof(int), | |
4829 | .mode = 0644, | |
4830 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4831 | }, |
4832 | { | |
e21e8467 SH |
4833 | .procname = "router_solicitation_delay", |
4834 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4835 | .maxlen = sizeof(int), | |
4836 | .mode = 0644, | |
4837 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4838 | }, |
4839 | { | |
e21e8467 SH |
4840 | .procname = "force_mld_version", |
4841 | .data = &ipv6_devconf.force_mld_version, | |
4842 | .maxlen = sizeof(int), | |
4843 | .mode = 0644, | |
4844 | .proc_handler = proc_dointvec, | |
1da177e4 | 4845 | }, |
fc4eba58 HFS |
4846 | { |
4847 | .procname = "mldv1_unsolicited_report_interval", | |
4848 | .data = | |
4849 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
4850 | .maxlen = sizeof(int), | |
4851 | .mode = 0644, | |
4852 | .proc_handler = proc_dointvec_ms_jiffies, | |
4853 | }, | |
4854 | { | |
4855 | .procname = "mldv2_unsolicited_report_interval", | |
4856 | .data = | |
4857 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
4858 | .maxlen = sizeof(int), | |
4859 | .mode = 0644, | |
4860 | .proc_handler = proc_dointvec_ms_jiffies, | |
4861 | }, | |
1da177e4 LT |
4862 | #ifdef CONFIG_IPV6_PRIVACY |
4863 | { | |
e21e8467 SH |
4864 | .procname = "use_tempaddr", |
4865 | .data = &ipv6_devconf.use_tempaddr, | |
4866 | .maxlen = sizeof(int), | |
4867 | .mode = 0644, | |
4868 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4869 | }, |
4870 | { | |
e21e8467 SH |
4871 | .procname = "temp_valid_lft", |
4872 | .data = &ipv6_devconf.temp_valid_lft, | |
4873 | .maxlen = sizeof(int), | |
4874 | .mode = 0644, | |
4875 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4876 | }, |
4877 | { | |
e21e8467 SH |
4878 | .procname = "temp_prefered_lft", |
4879 | .data = &ipv6_devconf.temp_prefered_lft, | |
4880 | .maxlen = sizeof(int), | |
4881 | .mode = 0644, | |
4882 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4883 | }, |
4884 | { | |
e21e8467 SH |
4885 | .procname = "regen_max_retry", |
4886 | .data = &ipv6_devconf.regen_max_retry, | |
4887 | .maxlen = sizeof(int), | |
4888 | .mode = 0644, | |
4889 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4890 | }, |
4891 | { | |
e21e8467 SH |
4892 | .procname = "max_desync_factor", |
4893 | .data = &ipv6_devconf.max_desync_factor, | |
4894 | .maxlen = sizeof(int), | |
4895 | .mode = 0644, | |
4896 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4897 | }, |
4898 | #endif | |
4899 | { | |
e21e8467 SH |
4900 | .procname = "max_addresses", |
4901 | .data = &ipv6_devconf.max_addresses, | |
4902 | .maxlen = sizeof(int), | |
4903 | .mode = 0644, | |
4904 | .proc_handler = proc_dointvec, | |
1da177e4 | 4905 | }, |
65f5c7c1 | 4906 | { |
e21e8467 SH |
4907 | .procname = "accept_ra_defrtr", |
4908 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4909 | .maxlen = sizeof(int), | |
4910 | .mode = 0644, | |
4911 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4912 | }, |
c4fd30eb | 4913 | { |
e21e8467 SH |
4914 | .procname = "accept_ra_pinfo", |
4915 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4916 | .maxlen = sizeof(int), | |
4917 | .mode = 0644, | |
4918 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4919 | }, |
930d6ff2 YH |
4920 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4921 | { | |
e21e8467 SH |
4922 | .procname = "accept_ra_rtr_pref", |
4923 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4924 | .maxlen = sizeof(int), | |
4925 | .mode = 0644, | |
4926 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4927 | }, |
52e16356 | 4928 | { |
e21e8467 SH |
4929 | .procname = "router_probe_interval", |
4930 | .data = &ipv6_devconf.rtr_probe_interval, | |
4931 | .maxlen = sizeof(int), | |
4932 | .mode = 0644, | |
4933 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4934 | }, |
fa03ef38 | 4935 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4936 | { |
e21e8467 SH |
4937 | .procname = "accept_ra_rt_info_max_plen", |
4938 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4939 | .maxlen = sizeof(int), | |
4940 | .mode = 0644, | |
4941 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4942 | }, |
4943 | #endif | |
930d6ff2 | 4944 | #endif |
fbea49e1 | 4945 | { |
e21e8467 SH |
4946 | .procname = "proxy_ndp", |
4947 | .data = &ipv6_devconf.proxy_ndp, | |
4948 | .maxlen = sizeof(int), | |
4949 | .mode = 0644, | |
4950 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4951 | }, |
0bcbc926 | 4952 | { |
e21e8467 SH |
4953 | .procname = "accept_source_route", |
4954 | .data = &ipv6_devconf.accept_source_route, | |
4955 | .maxlen = sizeof(int), | |
4956 | .mode = 0644, | |
4957 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4958 | }, |
95c385b4 NH |
4959 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4960 | { | |
e21e8467 SH |
4961 | .procname = "optimistic_dad", |
4962 | .data = &ipv6_devconf.optimistic_dad, | |
4963 | .maxlen = sizeof(int), | |
4964 | .mode = 0644, | |
4965 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4966 | |
4967 | }, | |
7bc570c8 YH |
4968 | #endif |
4969 | #ifdef CONFIG_IPV6_MROUTE | |
4970 | { | |
e21e8467 SH |
4971 | .procname = "mc_forwarding", |
4972 | .data = &ipv6_devconf.mc_forwarding, | |
4973 | .maxlen = sizeof(int), | |
4974 | .mode = 0444, | |
4975 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4976 | }, |
95c385b4 | 4977 | #endif |
778d80be | 4978 | { |
e21e8467 SH |
4979 | .procname = "disable_ipv6", |
4980 | .data = &ipv6_devconf.disable_ipv6, | |
4981 | .maxlen = sizeof(int), | |
4982 | .mode = 0644, | |
4983 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4984 | }, |
1b34be74 | 4985 | { |
e21e8467 SH |
4986 | .procname = "accept_dad", |
4987 | .data = &ipv6_devconf.accept_dad, | |
4988 | .maxlen = sizeof(int), | |
4989 | .mode = 0644, | |
4990 | .proc_handler = proc_dointvec, | |
1b34be74 | 4991 | }, |
f7734fdf | 4992 | { |
f7734fdf OP |
4993 | .procname = "force_tllao", |
4994 | .data = &ipv6_devconf.force_tllao, | |
4995 | .maxlen = sizeof(int), | |
4996 | .mode = 0644, | |
4997 | .proc_handler = proc_dointvec | |
4998 | }, | |
5cb04436 HFS |
4999 | { |
5000 | .procname = "ndisc_notify", | |
5001 | .data = &ipv6_devconf.ndisc_notify, | |
5002 | .maxlen = sizeof(int), | |
5003 | .mode = 0644, | |
5004 | .proc_handler = proc_dointvec | |
5005 | }, | |
1da177e4 | 5006 | { |
f8572d8f | 5007 | /* sentinel */ |
1da177e4 LT |
5008 | } |
5009 | }, | |
1da177e4 LT |
5010 | }; |
5011 | ||
bff16c2f | 5012 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5013 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5014 | { |
5015 | int i; | |
1da177e4 | 5016 | struct addrconf_sysctl_table *t; |
6105e293 | 5017 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5018 | |
af879cc7 | 5019 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 5020 | if (t == NULL) |
f68635e6 PE |
5021 | goto out; |
5022 | ||
bcdd553f | 5023 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5024 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5025 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5026 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5027 | } |
1da177e4 | 5028 | |
6105e293 | 5029 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5030 | |
6105e293 | 5031 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 5032 | if (t->sysctl_header == NULL) |
6105e293 | 5033 | goto free; |
f68635e6 PE |
5034 | |
5035 | p->sysctl = t; | |
95897312 | 5036 | return 0; |
1da177e4 | 5037 | |
f68635e6 | 5038 | free: |
1da177e4 | 5039 | kfree(t); |
f68635e6 | 5040 | out: |
95897312 | 5041 | return -ENOBUFS; |
1da177e4 LT |
5042 | } |
5043 | ||
408c4768 PE |
5044 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5045 | { | |
5046 | struct addrconf_sysctl_table *t; | |
5047 | ||
5048 | if (p->sysctl == NULL) | |
5049 | return; | |
5050 | ||
5051 | t = p->sysctl; | |
5052 | p->sysctl = NULL; | |
ff538818 | 5053 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5054 | kfree(t); |
5055 | } | |
5056 | ||
f52295a9 PE |
5057 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
5058 | { | |
54716e3b | 5059 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 5060 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 5061 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 5062 | idev, &idev->cnf); |
f52295a9 PE |
5063 | } |
5064 | ||
408c4768 | 5065 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5066 | { |
408c4768 PE |
5067 | __addrconf_sysctl_unregister(&idev->cnf); |
5068 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5069 | } |
5070 | ||
5071 | ||
5072 | #endif | |
5073 | ||
2c8c1e72 | 5074 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5075 | { |
a79ca223 | 5076 | int err = -ENOMEM; |
e0da5a48 PE |
5077 | struct ipv6_devconf *all, *dflt; |
5078 | ||
a79ca223 HZ |
5079 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
5080 | if (all == NULL) | |
5081 | goto err_alloc_all; | |
e0da5a48 | 5082 | |
a79ca223 HZ |
5083 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
5084 | if (dflt == NULL) | |
5085 | goto err_alloc_dflt; | |
e0da5a48 | 5086 | |
a79ca223 HZ |
5087 | /* these will be inherited by all namespaces */ |
5088 | dflt->autoconf = ipv6_defaults.autoconf; | |
5089 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
5090 | |
5091 | net->ipv6.devconf_all = all; | |
5092 | net->ipv6.devconf_dflt = dflt; | |
5093 | ||
5094 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5095 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5096 | if (err < 0) |
5097 | goto err_reg_all; | |
5098 | ||
f8572d8f | 5099 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5100 | if (err < 0) |
5101 | goto err_reg_dflt; | |
5102 | #endif | |
5103 | return 0; | |
5104 | ||
5105 | #ifdef CONFIG_SYSCTL | |
5106 | err_reg_dflt: | |
5107 | __addrconf_sysctl_unregister(all); | |
5108 | err_reg_all: | |
5109 | kfree(dflt); | |
5110 | #endif | |
5111 | err_alloc_dflt: | |
5112 | kfree(all); | |
5113 | err_alloc_all: | |
5114 | return err; | |
5115 | } | |
5116 | ||
2c8c1e72 | 5117 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5118 | { |
5119 | #ifdef CONFIG_SYSCTL | |
5120 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5121 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5122 | #endif | |
09ad9bc7 | 5123 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
5124 | kfree(net->ipv6.devconf_dflt); |
5125 | kfree(net->ipv6.devconf_all); | |
5126 | } | |
5127 | } | |
5128 | ||
5129 | static struct pernet_operations addrconf_ops = { | |
5130 | .init = addrconf_init_net, | |
5131 | .exit = addrconf_exit_net, | |
5132 | }; | |
5133 | ||
b382b191 TG |
5134 | static struct rtnl_af_ops inet6_ops = { |
5135 | .family = AF_INET6, | |
5136 | .fill_link_af = inet6_fill_link_af, | |
5137 | .get_link_af_size = inet6_get_link_af_size, | |
f53adae4 | 5138 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5139 | }; |
5140 | ||
1da177e4 LT |
5141 | /* |
5142 | * Init / cleanup code | |
5143 | */ | |
5144 | ||
5145 | int __init addrconf_init(void) | |
5146 | { | |
c2e21293 | 5147 | int i, err; |
2a8cc6c8 | 5148 | |
e21e8467 SH |
5149 | err = ipv6_addr_label_init(); |
5150 | if (err < 0) { | |
f3213831 JP |
5151 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5152 | __func__, err); | |
2cc6d2bf | 5153 | goto out; |
2a8cc6c8 | 5154 | } |
1da177e4 | 5155 | |
2cc6d2bf NH |
5156 | err = register_pernet_subsys(&addrconf_ops); |
5157 | if (err < 0) | |
5158 | goto out_addrlabel; | |
e0da5a48 | 5159 | |
1da177e4 LT |
5160 | /* The addrconf netdev notifier requires that loopback_dev |
5161 | * has it's ipv6 private information allocated and setup | |
5162 | * before it can bring up and give link-local addresses | |
5163 | * to other devices which are up. | |
5164 | * | |
5165 | * Unfortunately, loopback_dev is not necessarily the first | |
5166 | * entry in the global dev_base list of net devices. In fact, | |
5167 | * it is likely to be the very last entry on that list. | |
5168 | * So this causes the notifier registry below to try and | |
5169 | * give link-local addresses to all devices besides loopback_dev | |
5170 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5171 | * devices to fail to get a link-local address. | |
5172 | * | |
5173 | * So, as a temporary fix, allocate the ipv6 structure for | |
5174 | * loopback_dev first by hand. | |
5175 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5176 | * device and it being up should be removed. | |
5177 | */ | |
5178 | rtnl_lock(); | |
2774c7ab | 5179 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
5180 | err = -ENOMEM; |
5181 | rtnl_unlock(); | |
5182 | if (err) | |
e0da5a48 | 5183 | goto errlo; |
1da177e4 | 5184 | |
c2e21293 | 5185 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5186 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5187 | ||
1da177e4 LT |
5188 | register_netdevice_notifier(&ipv6_dev_notf); |
5189 | ||
1da177e4 | 5190 | addrconf_verify(0); |
c127ea2c | 5191 | |
b382b191 TG |
5192 | err = rtnl_af_register(&inet6_ops); |
5193 | if (err < 0) | |
5194 | goto errout_af; | |
5195 | ||
c7ac8679 GR |
5196 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5197 | NULL); | |
c127ea2c TG |
5198 | if (err < 0) |
5199 | goto errout; | |
5200 | ||
5201 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5202 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5203 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5204 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5205 | inet6_dump_ifaddr, NULL); | |
5206 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5207 | inet6_dump_ifmcaddr, NULL); | |
5208 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5209 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5210 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5211 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5212 | |
2a8cc6c8 YH |
5213 | ipv6_addr_label_rtnl_register(); |
5214 | ||
1da177e4 | 5215 | return 0; |
c127ea2c | 5216 | errout: |
b382b191 TG |
5217 | rtnl_af_unregister(&inet6_ops); |
5218 | errout_af: | |
c127ea2c | 5219 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 PE |
5220 | errlo: |
5221 | unregister_pernet_subsys(&addrconf_ops); | |
2cc6d2bf NH |
5222 | out_addrlabel: |
5223 | ipv6_addr_label_cleanup(); | |
5224 | out: | |
c127ea2c | 5225 | return err; |
1da177e4 LT |
5226 | } |
5227 | ||
09f7709f | 5228 | void addrconf_cleanup(void) |
1da177e4 | 5229 | { |
176c39af | 5230 | struct net_device *dev; |
1da177e4 LT |
5231 | int i; |
5232 | ||
5233 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5234 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5235 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5236 | |
5237 | rtnl_lock(); | |
5238 | ||
b382b191 TG |
5239 | __rtnl_af_unregister(&inet6_ops); |
5240 | ||
176c39af DL |
5241 | /* clean dev list */ |
5242 | for_each_netdev(&init_net, dev) { | |
5243 | if (__in6_dev_get(dev) == NULL) | |
5244 | continue; | |
5245 | addrconf_ifdown(dev, 1); | |
5246 | } | |
5247 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5248 | ||
1da177e4 LT |
5249 | /* |
5250 | * Check hash table. | |
5251 | */ | |
5c578aed | 5252 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5253 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5254 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5255 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
5256 | |
5257 | del_timer(&addr_chk_timer); | |
1da177e4 | 5258 | rtnl_unlock(); |
1da177e4 | 5259 | } |