Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 LT |
48 | #include <linux/net.h> |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
5a0e3ad6 | 58 | #include <linux/slab.h> |
1da177e4 LT |
59 | #ifdef CONFIG_SYSCTL |
60 | #include <linux/sysctl.h> | |
61 | #endif | |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/delay.h> |
64 | #include <linux/notifier.h> | |
543537bd | 65 | #include <linux/string.h> |
ddbe5032 | 66 | #include <linux/hash.h> |
1da177e4 | 67 | |
457c4cbc | 68 | #include <net/net_namespace.h> |
1da177e4 LT |
69 | #include <net/sock.h> |
70 | #include <net/snmp.h> | |
71 | ||
06a4c1c5 | 72 | #include <net/af_ieee802154.h> |
1da177e4 LT |
73 | #include <net/ipv6.h> |
74 | #include <net/protocol.h> | |
75 | #include <net/ndisc.h> | |
76 | #include <net/ip6_route.h> | |
77 | #include <net/addrconf.h> | |
78 | #include <net/tcp.h> | |
79 | #include <net/ip.h> | |
5d620266 | 80 | #include <net/netlink.h> |
f24e3d65 | 81 | #include <net/pkt_sched.h> |
1da177e4 LT |
82 | #include <linux/if_tunnel.h> |
83 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 84 | #include <linux/netconf.h> |
1da177e4 LT |
85 | |
86 | #ifdef CONFIG_IPV6_PRIVACY | |
87 | #include <linux/random.h> | |
1da177e4 LT |
88 | #endif |
89 | ||
e21e8467 | 90 | #include <linux/uaccess.h> |
7f7d9a6b | 91 | #include <asm/unaligned.h> |
1da177e4 LT |
92 | |
93 | #include <linux/proc_fs.h> | |
94 | #include <linux/seq_file.h> | |
bc3b2d7f | 95 | #include <linux/export.h> |
1da177e4 LT |
96 | |
97 | /* Set to 3 to get tracing... */ | |
98 | #define ACONF_DEBUG 2 | |
99 | ||
100 | #if ACONF_DEBUG >= 3 | |
101 | #define ADBG(x) printk x | |
102 | #else | |
103 | #define ADBG(x) | |
104 | #endif | |
105 | ||
106 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e TG |
107 | |
108 | static inline u32 cstamp_delta(unsigned long cstamp) | |
109 | { | |
110 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
111 | } | |
1da177e4 LT |
112 | |
113 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 114 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
115 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
116 | #else | |
117 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
118 | { | |
119 | } | |
120 | ||
121 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
122 | { | |
123 | } | |
1da177e4 LT |
124 | #endif |
125 | ||
126 | #ifdef CONFIG_IPV6_PRIVACY | |
eb7e0575 SD |
127 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
128 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 129 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 LT |
130 | #endif |
131 | ||
1b34be74 | 132 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
133 | static int ipv6_count_addresses(struct inet6_dev *idev); |
134 | ||
135 | /* | |
136 | * Configured unicast address hash table | |
137 | */ | |
c2e21293 | 138 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 139 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 140 | |
1da177e4 LT |
141 | static void addrconf_verify(unsigned long); |
142 | ||
8d06afab | 143 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
144 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
145 | ||
146 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
147 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
148 | ||
93d9b7d7 JP |
149 | static void addrconf_type_change(struct net_device *dev, |
150 | unsigned long event); | |
1da177e4 LT |
151 | static int addrconf_ifdown(struct net_device *dev, int how); |
152 | ||
21caa662 RK |
153 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
154 | int plen, | |
155 | const struct net_device *dev, | |
156 | u32 flags, u32 noflags); | |
157 | ||
cf22f9a2 | 158 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
1da177e4 LT |
159 | static void addrconf_dad_timer(unsigned long data); |
160 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 161 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
162 | static void addrconf_rs_timer(unsigned long data); |
163 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
164 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
165 | ||
1ab1457c | 166 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 167 | struct prefix_info *pinfo); |
3e81c6da DM |
168 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
169 | struct net_device *dev); | |
1da177e4 | 170 | |
e041c683 | 171 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
1da177e4 | 172 | |
888c848e | 173 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
174 | .forwarding = 0, |
175 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
176 | .mtu6 = IPV6_MIN_MTU, | |
177 | .accept_ra = 1, | |
178 | .accept_redirects = 1, | |
179 | .autoconf = 1, | |
180 | .force_mld_version = 0, | |
181 | .dad_transmits = 1, | |
182 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
183 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
184 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
185 | #ifdef CONFIG_IPV6_PRIVACY | |
186 | .use_tempaddr = 0, | |
187 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
188 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
189 | .regen_max_retry = REGEN_MAX_RETRY, | |
190 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
191 | #endif | |
192 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 193 | .accept_ra_defrtr = 1, |
c4fd30eb | 194 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
195 | #ifdef CONFIG_IPV6_ROUTER_PREF |
196 | .accept_ra_rtr_pref = 1, | |
52e16356 | 197 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
198 | #ifdef CONFIG_IPV6_ROUTE_INFO |
199 | .accept_ra_rt_info_max_plen = 0, | |
200 | #endif | |
930d6ff2 | 201 | #endif |
fbea49e1 | 202 | .proxy_ndp = 0, |
0bcbc926 | 203 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 204 | .disable_ipv6 = 0, |
1b34be74 | 205 | .accept_dad = 1, |
1da177e4 LT |
206 | }; |
207 | ||
ab32ea5d | 208 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
209 | .forwarding = 0, |
210 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
211 | .mtu6 = IPV6_MIN_MTU, | |
212 | .accept_ra = 1, | |
213 | .accept_redirects = 1, | |
214 | .autoconf = 1, | |
215 | .dad_transmits = 1, | |
216 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
217 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
218 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
219 | #ifdef CONFIG_IPV6_PRIVACY | |
220 | .use_tempaddr = 0, | |
221 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
222 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
223 | .regen_max_retry = REGEN_MAX_RETRY, | |
224 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
225 | #endif | |
226 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 227 | .accept_ra_defrtr = 1, |
c4fd30eb | 228 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
229 | #ifdef CONFIG_IPV6_ROUTER_PREF |
230 | .accept_ra_rtr_pref = 1, | |
52e16356 | 231 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
232 | #ifdef CONFIG_IPV6_ROUTE_INFO |
233 | .accept_ra_rt_info_max_plen = 0, | |
234 | #endif | |
930d6ff2 | 235 | #endif |
fbea49e1 | 236 | .proxy_ndp = 0, |
0bcbc926 | 237 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 238 | .disable_ipv6 = 0, |
1b34be74 | 239 | .accept_dad = 1, |
1da177e4 LT |
240 | }; |
241 | ||
242 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 243 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 244 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
245 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
246 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
2c5e8933 HFS |
247 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; |
248 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; | |
249 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; | |
1da177e4 | 250 | |
f24e3d65 | 251 | /* Check if a valid qdisc is available */ |
05297949 | 252 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 253 | { |
05297949 | 254 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
255 | } |
256 | ||
1da177e4 LT |
257 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
258 | { | |
259 | if (del_timer(&ifp->timer)) | |
260 | __in6_ifa_put(ifp); | |
261 | } | |
262 | ||
e21e8467 | 263 | enum addrconf_timer_t { |
1da177e4 LT |
264 | AC_NONE, |
265 | AC_DAD, | |
266 | AC_RS, | |
267 | }; | |
268 | ||
269 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, | |
270 | enum addrconf_timer_t what, | |
271 | unsigned long when) | |
272 | { | |
273 | if (!del_timer(&ifp->timer)) | |
274 | in6_ifa_hold(ifp); | |
275 | ||
276 | switch (what) { | |
277 | case AC_DAD: | |
278 | ifp->timer.function = addrconf_dad_timer; | |
279 | break; | |
280 | case AC_RS: | |
281 | ifp->timer.function = addrconf_rs_timer; | |
282 | break; | |
e21e8467 SH |
283 | default: |
284 | break; | |
1da177e4 LT |
285 | } |
286 | ifp->timer.expires = jiffies + when; | |
287 | add_timer(&ifp->timer); | |
288 | } | |
289 | ||
7f7d9a6b HX |
290 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
291 | { | |
7d720c3e | 292 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
1823e4c8 ED |
293 | sizeof(struct ipstats_mib), |
294 | __alignof__(struct ipstats_mib)) < 0) | |
7f7d9a6b | 295 | goto err_ip; |
be281e55 ED |
296 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
297 | GFP_KERNEL); | |
298 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 299 | goto err_icmp; |
be281e55 ED |
300 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
301 | GFP_KERNEL); | |
302 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 303 | goto err_icmpmsg; |
7f7d9a6b HX |
304 | |
305 | return 0; | |
306 | ||
14878f75 | 307 | err_icmpmsg: |
be281e55 | 308 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 309 | err_icmp: |
7d720c3e | 310 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 311 | err_ip: |
aaf70ec7 | 312 | return -ENOMEM; |
7f7d9a6b HX |
313 | } |
314 | ||
16910b98 | 315 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 316 | { |
be281e55 ED |
317 | kfree(idev->stats.icmpv6msgdev); |
318 | kfree(idev->stats.icmpv6dev); | |
7d720c3e | 319 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b HX |
320 | } |
321 | ||
1da177e4 LT |
322 | /* Nobody refers to this device, we may destroy it. */ |
323 | ||
324 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
325 | { | |
326 | struct net_device *dev = idev->dev; | |
547b792c | 327 | |
502a2ffd | 328 | WARN_ON(!list_empty(&idev->addr_list)); |
547b792c IJ |
329 | WARN_ON(idev->mc_list != NULL); |
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); |
361 | ||
c346dca1 | 362 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
363 | ndev->cnf.mtu6 = dev->mtu; |
364 | ndev->cnf.sysctl = NULL; | |
365 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
366 | if (ndev->nd_parms == NULL) { | |
367 | kfree(ndev); | |
368 | return NULL; | |
369 | } | |
0187bdfb BH |
370 | if (ndev->cnf.forwarding) |
371 | dev_disable_lro(dev); | |
322f74a4 IO |
372 | /* We refer to the device */ |
373 | dev_hold(dev); | |
1da177e4 | 374 | |
322f74a4 IO |
375 | if (snmp6_alloc_dev(ndev) < 0) { |
376 | ADBG((KERN_WARNING | |
f3213831 | 377 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
0dc47877 | 378 | __func__, dev->name)); |
322f74a4 | 379 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
380 | dev_put(dev); |
381 | kfree(ndev); | |
322f74a4 IO |
382 | return NULL; |
383 | } | |
1da177e4 | 384 | |
322f74a4 IO |
385 | if (snmp6_register_dev(ndev) < 0) { |
386 | ADBG((KERN_WARNING | |
f3213831 | 387 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
0dc47877 | 388 | __func__, dev->name)); |
322f74a4 IO |
389 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
390 | ndev->dead = 1; | |
391 | in6_dev_finish_destroy(ndev); | |
392 | return NULL; | |
393 | } | |
394 | ||
395 | /* One reference from device. We must do this before | |
396 | * we invoke __ipv6_regen_rndid(). | |
397 | */ | |
398 | in6_dev_hold(ndev); | |
1da177e4 | 399 | |
1b34be74 YH |
400 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
401 | ndev->cnf.accept_dad = -1; | |
402 | ||
07a93626 | 403 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 404 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 405 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
406 | ndev->cnf.rtr_solicits = 0; |
407 | } | |
408 | #endif | |
409 | ||
1da177e4 | 410 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 411 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 412 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
413 | if ((dev->flags&IFF_LOOPBACK) || |
414 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 415 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 416 | dev->type == ARPHRD_SIT || |
0be669bb | 417 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
418 | ndev->cnf.use_tempaddr = -1; |
419 | } else { | |
420 | in6_dev_hold(ndev); | |
421 | ipv6_regen_rndid((unsigned long) ndev); | |
422 | } | |
1da177e4 LT |
423 | #endif |
424 | ||
f24e3d65 | 425 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
426 | ndev->if_flags |= IF_READY; |
427 | ||
322f74a4 IO |
428 | ipv6_mc_init_dev(ndev); |
429 | ndev->tstamp = jiffies; | |
f52295a9 | 430 | addrconf_sysctl_register(ndev); |
30c4cf57 | 431 | /* protected by rtnl_lock */ |
cf778b00 | 432 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 433 | |
2c5e8933 HFS |
434 | /* Join interface-local all-node multicast group */ |
435 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
436 | ||
d88ae4cc | 437 | /* Join all-node multicast group */ |
f3ee4010 | 438 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 439 | |
d6ddef9e | 440 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 441 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
442 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
443 | ||
1da177e4 LT |
444 | return ndev; |
445 | } | |
446 | ||
8e5e8f30 | 447 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
448 | { |
449 | struct inet6_dev *idev; | |
450 | ||
451 | ASSERT_RTNL(); | |
452 | ||
e21e8467 SH |
453 | idev = __in6_dev_get(dev); |
454 | if (!idev) { | |
455 | idev = ipv6_add_dev(dev); | |
456 | if (!idev) | |
1da177e4 LT |
457 | return NULL; |
458 | } | |
c5e33bdd | 459 | |
1da177e4 LT |
460 | if (dev->flags&IFF_UP) |
461 | ipv6_mc_up(idev); | |
462 | return idev; | |
463 | } | |
464 | ||
f3a1bfb1 ND |
465 | static int inet6_netconf_msgsize_devconf(int type) |
466 | { | |
467 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
468 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
469 | ||
76f8f6cb ND |
470 | /* type -1 is used for ALL */ |
471 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 472 | size += nla_total_size(4); |
b1afce95 | 473 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
474 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
475 | size += nla_total_size(4); | |
b1afce95 | 476 | #endif |
f3a1bfb1 ND |
477 | |
478 | return size; | |
479 | } | |
480 | ||
481 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
482 | struct ipv6_devconf *devconf, u32 portid, | |
483 | u32 seq, int event, unsigned int flags, | |
484 | int type) | |
485 | { | |
486 | struct nlmsghdr *nlh; | |
487 | struct netconfmsg *ncm; | |
488 | ||
489 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
490 | flags); | |
491 | if (nlh == NULL) | |
492 | return -EMSGSIZE; | |
493 | ||
494 | ncm = nlmsg_data(nlh); | |
495 | ncm->ncm_family = AF_INET6; | |
496 | ||
497 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
498 | goto nla_put_failure; | |
499 | ||
76f8f6cb ND |
500 | /* type -1 is used for ALL */ |
501 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
502 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
503 | goto nla_put_failure; | |
b1afce95 | 504 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
505 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
506 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
507 | devconf->mc_forwarding) < 0) | |
508 | goto nla_put_failure; | |
b1afce95 | 509 | #endif |
f3a1bfb1 ND |
510 | return nlmsg_end(skb, nlh); |
511 | ||
512 | nla_put_failure: | |
513 | nlmsg_cancel(skb, nlh); | |
514 | return -EMSGSIZE; | |
515 | } | |
516 | ||
d67b8c61 ND |
517 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
518 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
519 | { |
520 | struct sk_buff *skb; | |
521 | int err = -ENOBUFS; | |
522 | ||
523 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
524 | if (skb == NULL) | |
525 | goto errout; | |
526 | ||
527 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
528 | RTM_NEWNETCONF, 0, type); | |
529 | if (err < 0) { | |
530 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
531 | WARN_ON(err == -EMSGSIZE); | |
532 | kfree_skb(skb); | |
533 | goto errout; | |
534 | } | |
535 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
536 | return; | |
537 | errout: | |
bd779028 | 538 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
539 | } |
540 | ||
76f8f6cb ND |
541 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
542 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
543 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
544 | }; | |
545 | ||
546 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
547 | struct nlmsghdr *nlh, | |
548 | void *arg) | |
549 | { | |
550 | struct net *net = sock_net(in_skb->sk); | |
551 | struct nlattr *tb[NETCONFA_MAX+1]; | |
552 | struct netconfmsg *ncm; | |
553 | struct sk_buff *skb; | |
554 | struct ipv6_devconf *devconf; | |
555 | struct inet6_dev *in6_dev; | |
556 | struct net_device *dev; | |
557 | int ifindex; | |
558 | int err; | |
559 | ||
560 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
561 | devconf_ipv6_policy); | |
562 | if (err < 0) | |
563 | goto errout; | |
564 | ||
565 | err = EINVAL; | |
566 | if (!tb[NETCONFA_IFINDEX]) | |
567 | goto errout; | |
568 | ||
569 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
570 | switch (ifindex) { | |
571 | case NETCONFA_IFINDEX_ALL: | |
572 | devconf = net->ipv6.devconf_all; | |
573 | break; | |
574 | case NETCONFA_IFINDEX_DEFAULT: | |
575 | devconf = net->ipv6.devconf_dflt; | |
576 | break; | |
577 | default: | |
578 | dev = __dev_get_by_index(net, ifindex); | |
579 | if (dev == NULL) | |
580 | goto errout; | |
581 | in6_dev = __in6_dev_get(dev); | |
582 | if (in6_dev == NULL) | |
583 | goto errout; | |
584 | devconf = &in6_dev->cnf; | |
585 | break; | |
586 | } | |
587 | ||
588 | err = -ENOBUFS; | |
589 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
590 | if (skb == NULL) | |
591 | goto errout; | |
592 | ||
593 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
594 | NETLINK_CB(in_skb).portid, | |
595 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
596 | -1); | |
597 | if (err < 0) { | |
598 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
599 | WARN_ON(err == -EMSGSIZE); | |
600 | kfree_skb(skb); | |
601 | goto errout; | |
602 | } | |
603 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
604 | errout: | |
605 | return err; | |
606 | } | |
607 | ||
1da177e4 LT |
608 | #ifdef CONFIG_SYSCTL |
609 | static void dev_forward_change(struct inet6_dev *idev) | |
610 | { | |
611 | struct net_device *dev; | |
612 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
613 | |
614 | if (!idev) | |
615 | return; | |
616 | dev = idev->dev; | |
0187bdfb BH |
617 | if (idev->cnf.forwarding) |
618 | dev_disable_lro(dev); | |
1a940835 | 619 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 620 | if (idev->cnf.forwarding) { |
f3ee4010 | 621 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
622 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
623 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
624 | } else { | |
f3ee4010 | 625 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
626 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
627 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
628 | } | |
1da177e4 | 629 | } |
502a2ffd | 630 | |
631 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
632 | if (ifa->flags&IFA_F_TENTATIVE) |
633 | continue; | |
1da177e4 LT |
634 | if (idev->cnf.forwarding) |
635 | addrconf_join_anycast(ifa); | |
636 | else | |
637 | addrconf_leave_anycast(ifa); | |
638 | } | |
f3a1bfb1 ND |
639 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
640 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
641 | } |
642 | ||
643 | ||
e186932b | 644 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
645 | { |
646 | struct net_device *dev; | |
647 | struct inet6_dev *idev; | |
648 | ||
4acd4945 | 649 | for_each_netdev(net, dev) { |
1da177e4 LT |
650 | idev = __in6_dev_get(dev); |
651 | if (idev) { | |
e186932b PE |
652 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
653 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
654 | if (changed) |
655 | dev_forward_change(idev); | |
656 | } | |
1da177e4 | 657 | } |
1da177e4 | 658 | } |
c8fecf22 | 659 | |
013d97e9 | 660 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 661 | { |
bff16c2f | 662 | struct net *net; |
013d97e9 FR |
663 | int old; |
664 | ||
665 | if (!rtnl_trylock()) | |
666 | return restart_syscall(); | |
bff16c2f PE |
667 | |
668 | net = (struct net *)table->extra2; | |
013d97e9 FR |
669 | old = *p; |
670 | *p = newf; | |
b325fddb | 671 | |
013d97e9 | 672 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
673 | if ((!newf) ^ (!old)) |
674 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
675 | NETCONFA_IFINDEX_DEFAULT, | |
676 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
677 | rtnl_unlock(); |
678 | return 0; | |
88af182e | 679 | } |
c8fecf22 | 680 | |
e186932b | 681 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
682 | net->ipv6.devconf_dflt->forwarding = newf; |
683 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
684 | if ((!newf) ^ (!old)) |
685 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
686 | NETCONFA_IFINDEX_ALL, | |
687 | net->ipv6.devconf_all); | |
013d97e9 | 688 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 689 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 690 | rtnl_unlock(); |
c8fecf22 | 691 | |
013d97e9 | 692 | if (newf) |
7b4da532 | 693 | rt6_purge_dflt_routers(net); |
b325fddb | 694 | return 1; |
c8fecf22 | 695 | } |
1da177e4 LT |
696 | #endif |
697 | ||
5c578aed | 698 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
699 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
700 | { | |
c2e21293 | 701 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 702 | |
1da177e4 | 703 | #ifdef NET_REFCNT_DEBUG |
91df42be | 704 | pr_debug("%s\n", __func__); |
1da177e4 LT |
705 | #endif |
706 | ||
707 | in6_dev_put(ifp->idev); | |
708 | ||
709 | if (del_timer(&ifp->timer)) | |
e21e8467 | 710 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 | 711 | |
e9d3e084 | 712 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 713 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
714 | return; |
715 | } | |
94e187c0 | 716 | ip6_rt_put(ifp->rt); |
1da177e4 | 717 | |
e5785985 | 718 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
719 | } |
720 | ||
e55ffac6 BH |
721 | static void |
722 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
723 | { | |
502a2ffd | 724 | struct list_head *p; |
8a6ce0c0 | 725 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
726 | |
727 | /* | |
728 | * Each device address list is sorted in order of scope - | |
729 | * global before linklocal. | |
730 | */ | |
502a2ffd | 731 | list_for_each(p, &idev->addr_list) { |
732 | struct inet6_ifaddr *ifa | |
733 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 734 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
735 | break; |
736 | } | |
737 | ||
b54c9b98 | 738 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
739 | } |
740 | ||
ddbe5032 | 741 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 742 | { |
ddbe5032 | 743 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
744 | } |
745 | ||
1da177e4 LT |
746 | /* On success it returns ifp with increased reference count */ |
747 | ||
748 | static struct inet6_ifaddr * | |
749 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 750 | int scope, u32 flags) |
1da177e4 LT |
751 | { |
752 | struct inet6_ifaddr *ifa = NULL; | |
753 | struct rt6_info *rt; | |
3a88a81d | 754 | unsigned int hash; |
1da177e4 | 755 | int err = 0; |
d68b8270 YH |
756 | int addr_type = ipv6_addr_type(addr); |
757 | ||
758 | if (addr_type == IPV6_ADDR_ANY || | |
759 | addr_type & IPV6_ADDR_MULTICAST || | |
760 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
761 | addr_type & IPV6_ADDR_LOOPBACK)) | |
762 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 763 | |
8814c4b5 | 764 | rcu_read_lock_bh(); |
1da177e4 LT |
765 | if (idev->dead) { |
766 | err = -ENODEV; /*XXX*/ | |
767 | goto out2; | |
768 | } | |
769 | ||
56d417b1 | 770 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
771 | err = -EACCES; |
772 | goto out2; | |
773 | } | |
774 | ||
5c578aed | 775 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
776 | |
777 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 778 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
779 | ADBG(("ipv6_add_addr: already assigned\n")); |
780 | err = -EEXIST; | |
781 | goto out; | |
782 | } | |
783 | ||
322f74a4 | 784 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
785 | |
786 | if (ifa == NULL) { | |
787 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
788 | err = -ENOBUFS; | |
789 | goto out; | |
790 | } | |
791 | ||
8f031519 | 792 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
793 | if (IS_ERR(rt)) { |
794 | err = PTR_ERR(rt); | |
795 | goto out; | |
796 | } | |
797 | ||
4e3fd7a0 | 798 | ifa->addr = *addr; |
1da177e4 LT |
799 | |
800 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 801 | spin_lock_init(&ifa->state_lock); |
1da177e4 | 802 | init_timer(&ifa->timer); |
c2e21293 | 803 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
804 | ifa->timer.data = (unsigned long) ifa; |
805 | ifa->scope = scope; | |
806 | ifa->prefix_len = pfxlen; | |
807 | ifa->flags = flags | IFA_F_TENTATIVE; | |
808 | ifa->cstamp = ifa->tstamp = jiffies; | |
809 | ||
57f5f544 KF |
810 | ifa->rt = rt; |
811 | ||
1da177e4 LT |
812 | ifa->idev = idev; |
813 | in6_dev_hold(idev); | |
814 | /* For caller */ | |
815 | in6_ifa_hold(ifa); | |
816 | ||
817 | /* Add to big hash table */ | |
ddbe5032 | 818 | hash = inet6_addr_hash(addr); |
1da177e4 | 819 | |
5c578aed | 820 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 821 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
822 | |
823 | write_lock(&idev->lock); | |
824 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 825 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
826 | |
827 | #ifdef CONFIG_IPV6_PRIVACY | |
828 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 829 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
830 | in6_ifa_hold(ifa); |
831 | } | |
832 | #endif | |
833 | ||
1da177e4 LT |
834 | in6_ifa_hold(ifa); |
835 | write_unlock(&idev->lock); | |
836 | out2: | |
8814c4b5 | 837 | rcu_read_unlock_bh(); |
1da177e4 | 838 | |
fd92833a | 839 | if (likely(err == 0)) |
e041c683 | 840 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
841 | else { |
842 | kfree(ifa); | |
843 | ifa = ERR_PTR(err); | |
844 | } | |
845 | ||
846 | return ifa; | |
847 | out: | |
5c578aed | 848 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
849 | goto out2; |
850 | } | |
851 | ||
852 | /* This function wants to get referenced ifp and releases it before return */ | |
853 | ||
854 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
855 | { | |
502a2ffd | 856 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 857 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 858 | int state; |
1da177e4 LT |
859 | int deleted = 0, onlink = 0; |
860 | unsigned long expires = jiffies; | |
861 | ||
4c5ff6a6 HX |
862 | spin_lock_bh(&ifp->state_lock); |
863 | state = ifp->state; | |
e9d3e084 | 864 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
865 | spin_unlock_bh(&ifp->state_lock); |
866 | ||
867 | if (state == INET6_IFADDR_STATE_DEAD) | |
868 | goto out; | |
1da177e4 | 869 | |
5c578aed | 870 | spin_lock_bh(&addrconf_hash_lock); |
871 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 872 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
873 | |
874 | write_lock_bh(&idev->lock); | |
875 | #ifdef CONFIG_IPV6_PRIVACY | |
876 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 877 | list_del(&ifp->tmp_list); |
878 | if (ifp->ifpub) { | |
879 | in6_ifa_put(ifp->ifpub); | |
880 | ifp->ifpub = NULL; | |
1da177e4 | 881 | } |
372e6c8f | 882 | __in6_ifa_put(ifp); |
1da177e4 LT |
883 | } |
884 | #endif | |
885 | ||
502a2ffd | 886 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 887 | if (ifa == ifp) { |
502a2ffd | 888 | list_del_init(&ifp->if_list); |
1da177e4 | 889 | __in6_ifa_put(ifp); |
502a2ffd | 890 | |
1da177e4 LT |
891 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
892 | break; | |
893 | deleted = 1; | |
1d142804 | 894 | continue; |
1da177e4 LT |
895 | } else if (ifp->flags & IFA_F_PERMANENT) { |
896 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
897 | ifp->prefix_len)) { | |
898 | if (ifa->flags & IFA_F_PERMANENT) { | |
899 | onlink = 1; | |
900 | if (deleted) | |
901 | break; | |
902 | } else { | |
903 | unsigned long lifetime; | |
904 | ||
905 | if (!onlink) | |
906 | onlink = -1; | |
907 | ||
908 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
909 | |
910 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
911 | /* | |
912 | * Note: Because this address is | |
913 | * not permanent, lifetime < | |
914 | * LONG_MAX / HZ here. | |
915 | */ | |
1da177e4 LT |
916 | if (time_before(expires, |
917 | ifa->tstamp + lifetime * HZ)) | |
918 | expires = ifa->tstamp + lifetime * HZ; | |
919 | spin_unlock(&ifa->lock); | |
920 | } | |
921 | } | |
922 | } | |
923 | } | |
924 | write_unlock_bh(&idev->lock); | |
925 | ||
b2238566 AV |
926 | addrconf_del_timer(ifp); |
927 | ||
1da177e4 LT |
928 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
929 | ||
e041c683 | 930 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4 | 931 | |
1da177e4 LT |
932 | /* |
933 | * Purge or update corresponding prefix | |
934 | * | |
935 | * 1) we don't purge prefix here if address was not permanent. | |
936 | * prefix is managed by its own lifetime. | |
937 | * 2) if there're no addresses, delete prefix. | |
938 | * 3) if there're still other permanent address(es), | |
939 | * corresponding prefix is still permanent. | |
940 | * 4) otherwise, update prefix lifetime to the | |
941 | * longest valid lifetime among the corresponding | |
942 | * addresses on the device. | |
943 | * Note: subsequent RA will update lifetime. | |
944 | * | |
945 | * --yoshfuji | |
946 | */ | |
947 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
948 | struct in6_addr prefix; | |
949 | struct rt6_info *rt; | |
64c6d08e | 950 | |
1da177e4 | 951 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
1da177e4 | 952 | |
21caa662 RK |
953 | rt = addrconf_get_prefix_route(&prefix, |
954 | ifp->prefix_len, | |
955 | ifp->idev->dev, | |
956 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
957 | ||
958 | if (rt) { | |
1da177e4 | 959 | if (onlink == 0) { |
e0a1ad73 | 960 | ip6_del_rt(rt); |
1da177e4 LT |
961 | rt = NULL; |
962 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 963 | rt6_set_expires(rt, expires); |
1da177e4 LT |
964 | } |
965 | } | |
94e187c0 | 966 | ip6_rt_put(rt); |
1da177e4 LT |
967 | } |
968 | ||
c3968a85 DW |
969 | /* clean up prefsrc entries */ |
970 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 971 | out: |
1da177e4 LT |
972 | in6_ifa_put(ifp); |
973 | } | |
974 | ||
975 | #ifdef CONFIG_IPV6_PRIVACY | |
976 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
977 | { | |
978 | struct inet6_dev *idev = ifp->idev; | |
979 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 980 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 981 | unsigned long regen_advance; |
1da177e4 LT |
982 | int tmp_plen; |
983 | int ret = 0; | |
984 | int max_addresses; | |
95c385b4 | 985 | u32 addr_flags; |
76f793e3 | 986 | unsigned long now = jiffies; |
1da177e4 LT |
987 | |
988 | write_lock(&idev->lock); | |
989 | if (ift) { | |
990 | spin_lock_bh(&ift->lock); | |
991 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
992 | spin_unlock_bh(&ift->lock); | |
993 | tmpaddr = &addr; | |
994 | } else { | |
995 | tmpaddr = NULL; | |
996 | } | |
997 | retry: | |
998 | in6_dev_hold(idev); | |
999 | if (idev->cnf.use_tempaddr <= 0) { | |
1000 | write_unlock(&idev->lock); | |
f3213831 | 1001 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1002 | in6_dev_put(idev); |
1003 | ret = -1; | |
1004 | goto out; | |
1005 | } | |
1006 | spin_lock_bh(&ifp->lock); | |
1007 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1008 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1009 | spin_unlock_bh(&ifp->lock); | |
1010 | write_unlock(&idev->lock); | |
f3213831 JP |
1011 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1012 | __func__); | |
1da177e4 LT |
1013 | in6_dev_put(idev); |
1014 | ret = -1; | |
1015 | goto out; | |
1016 | } | |
1017 | in6_ifa_hold(ifp); | |
1018 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1019 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1020 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1021 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1022 | tmp_valid_lft = min_t(__u32, |
1023 | ifp->valid_lft, | |
7a876b0e | 1024 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1025 | tmp_prefered_lft = min_t(__u32, |
1026 | ifp->prefered_lft, | |
7a876b0e | 1027 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1028 | idev->cnf.max_desync_factor); |
1da177e4 LT |
1029 | tmp_plen = ifp->prefix_len; |
1030 | max_addresses = idev->cnf.max_addresses; | |
1da177e4 LT |
1031 | tmp_tstamp = ifp->tstamp; |
1032 | spin_unlock_bh(&ifp->lock); | |
1033 | ||
eac55bf9 BB |
1034 | regen_advance = idev->cnf.regen_max_retry * |
1035 | idev->cnf.dad_transmits * | |
1036 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 1037 | write_unlock(&idev->lock); |
95c385b4 | 1038 | |
eac55bf9 BB |
1039 | /* A temporary address is created only if this calculated Preferred |
1040 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1041 | * an implementation must not create a temporary address with a zero | |
1042 | * Preferred Lifetime. | |
1043 | */ | |
1044 | if (tmp_prefered_lft <= regen_advance) { | |
1045 | in6_ifa_put(ifp); | |
1046 | in6_dev_put(idev); | |
1047 | ret = -1; | |
1048 | goto out; | |
1049 | } | |
1050 | ||
95c385b4 NH |
1051 | addr_flags = IFA_F_TEMPORARY; |
1052 | /* set in addrconf_prefix_rcv() */ | |
1053 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1054 | addr_flags |= IFA_F_OPTIMISTIC; | |
1055 | ||
1da177e4 | 1056 | ift = !max_addresses || |
1ab1457c | 1057 | ipv6_count_addresses(idev) < max_addresses ? |
1da177e4 | 1058 | ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4 NH |
1059 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, |
1060 | addr_flags) : NULL; | |
3f0d2ba0 | 1061 | if (IS_ERR_OR_NULL(ift)) { |
1da177e4 LT |
1062 | in6_ifa_put(ifp); |
1063 | in6_dev_put(idev); | |
f3213831 | 1064 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 LT |
1065 | tmpaddr = &addr; |
1066 | write_lock(&idev->lock); | |
1067 | goto retry; | |
1068 | } | |
1069 | ||
1070 | spin_lock_bh(&ift->lock); | |
1071 | ift->ifpub = ifp; | |
1072 | ift->valid_lft = tmp_valid_lft; | |
1073 | ift->prefered_lft = tmp_prefered_lft; | |
76f793e3 | 1074 | ift->cstamp = now; |
1da177e4 LT |
1075 | ift->tstamp = tmp_tstamp; |
1076 | spin_unlock_bh(&ift->lock); | |
1077 | ||
cf22f9a2 | 1078 | addrconf_dad_start(ift); |
1da177e4 LT |
1079 | in6_ifa_put(ift); |
1080 | in6_dev_put(idev); | |
1081 | out: | |
1082 | return ret; | |
1083 | } | |
1084 | #endif | |
1085 | ||
1086 | /* | |
072047e4 | 1087 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1088 | */ |
a9b05723 YH |
1089 | enum { |
1090 | IPV6_SADDR_RULE_INIT = 0, | |
1091 | IPV6_SADDR_RULE_LOCAL, | |
1092 | IPV6_SADDR_RULE_SCOPE, | |
1093 | IPV6_SADDR_RULE_PREFERRED, | |
1094 | #ifdef CONFIG_IPV6_MIP6 | |
1095 | IPV6_SADDR_RULE_HOA, | |
1096 | #endif | |
1097 | IPV6_SADDR_RULE_OIF, | |
1098 | IPV6_SADDR_RULE_LABEL, | |
1099 | #ifdef CONFIG_IPV6_PRIVACY | |
1100 | IPV6_SADDR_RULE_PRIVACY, | |
1101 | #endif | |
1102 | IPV6_SADDR_RULE_ORCHID, | |
1103 | IPV6_SADDR_RULE_PREFIX, | |
1104 | IPV6_SADDR_RULE_MAX | |
1105 | }; | |
1106 | ||
072047e4 | 1107 | struct ipv6_saddr_score { |
a9b05723 YH |
1108 | int rule; |
1109 | int addr_type; | |
1110 | struct inet6_ifaddr *ifa; | |
1111 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1112 | int scopedist; | |
1113 | int matchlen; | |
072047e4 YH |
1114 | }; |
1115 | ||
a9b05723 | 1116 | struct ipv6_saddr_dst { |
9acd9f3a | 1117 | const struct in6_addr *addr; |
a9b05723 YH |
1118 | int ifindex; |
1119 | int scope; | |
1120 | int label; | |
7cbca67c | 1121 | unsigned int prefs; |
a9b05723 | 1122 | }; |
072047e4 | 1123 | |
b6f99a21 | 1124 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1125 | { |
45bb0060 | 1126 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1127 | return 1; |
1128 | return 0; | |
1da177e4 LT |
1129 | } |
1130 | ||
3de23255 BT |
1131 | static int ipv6_get_saddr_eval(struct net *net, |
1132 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1133 | struct ipv6_saddr_dst *dst, |
1134 | int i) | |
1135 | { | |
1136 | int ret; | |
1137 | ||
1138 | if (i <= score->rule) { | |
1139 | switch (i) { | |
1140 | case IPV6_SADDR_RULE_SCOPE: | |
1141 | ret = score->scopedist; | |
1142 | break; | |
1143 | case IPV6_SADDR_RULE_PREFIX: | |
1144 | ret = score->matchlen; | |
1145 | break; | |
1146 | default: | |
1147 | ret = !!test_bit(i, score->scorebits); | |
1148 | } | |
1149 | goto out; | |
1150 | } | |
1151 | ||
1152 | switch (i) { | |
1153 | case IPV6_SADDR_RULE_INIT: | |
1154 | /* Rule 0: remember if hiscore is not ready yet */ | |
1155 | ret = !!score->ifa; | |
1156 | break; | |
1157 | case IPV6_SADDR_RULE_LOCAL: | |
1158 | /* Rule 1: Prefer same address */ | |
1159 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1160 | break; | |
1161 | case IPV6_SADDR_RULE_SCOPE: | |
1162 | /* Rule 2: Prefer appropriate scope | |
1163 | * | |
1164 | * ret | |
1165 | * ^ | |
1166 | * -1 | d 15 | |
1167 | * ---+--+-+---> scope | |
1168 | * | | |
1169 | * | d is scope of the destination. | |
1170 | * B-d | \ | |
1171 | * | \ <- smaller scope is better if | |
1172 | * B-15 | \ if scope is enough for destinaion. | |
1173 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1174 | * d-C-1 | / | |
1175 | * |/ <- greater is better | |
1176 | * -C / if scope is not enough for destination. | |
1177 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1178 | * | |
1179 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1180 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1181 | * Assume B = 0 and we get C > 29. | |
1182 | */ | |
1183 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1184 | if (ret >= dst->scope) | |
1185 | ret = -ret; | |
1186 | else | |
1187 | ret -= 128; /* 30 is enough */ | |
1188 | score->scopedist = ret; | |
1189 | break; | |
1190 | case IPV6_SADDR_RULE_PREFERRED: | |
1191 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1192 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1193 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1194 | break; | |
1195 | #ifdef CONFIG_IPV6_MIP6 | |
1196 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1197 | { |
a9b05723 | 1198 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1199 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1200 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1201 | break; |
7cbca67c | 1202 | } |
a9b05723 YH |
1203 | #endif |
1204 | case IPV6_SADDR_RULE_OIF: | |
1205 | /* Rule 5: Prefer outgoing interface */ | |
1206 | ret = (!dst->ifindex || | |
1207 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1208 | break; | |
1209 | case IPV6_SADDR_RULE_LABEL: | |
1210 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1211 | ret = ipv6_addr_label(net, |
1212 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1213 | score->ifa->idev->dev->ifindex) == dst->label; |
1214 | break; | |
1215 | #ifdef CONFIG_IPV6_PRIVACY | |
1216 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1217 | { |
a9b05723 | 1218 | /* Rule 7: Prefer public address |
25985edc | 1219 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1220 | */ |
7cbca67c YH |
1221 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1222 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1223 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1224 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1225 | break; |
7cbca67c | 1226 | } |
a9b05723 YH |
1227 | #endif |
1228 | case IPV6_SADDR_RULE_ORCHID: | |
1229 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1230 | * non-ORCHID vs non-ORCHID | |
1231 | */ | |
1232 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1233 | ipv6_addr_orchid(dst->addr)); | |
1234 | break; | |
1235 | case IPV6_SADDR_RULE_PREFIX: | |
1236 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1237 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1238 | if (ret > score->ifa->prefix_len) | |
1239 | ret = score->ifa->prefix_len; | |
1240 | score->matchlen = ret; | |
a9b05723 YH |
1241 | break; |
1242 | default: | |
1243 | ret = 0; | |
1244 | } | |
1245 | ||
1246 | if (ret) | |
1247 | __set_bit(i, score->scorebits); | |
1248 | score->rule = i; | |
1249 | out: | |
1250 | return ret; | |
1251 | } | |
1252 | ||
b3f644fc | 1253 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1254 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1255 | struct in6_addr *saddr) |
1da177e4 | 1256 | { |
a9b05723 YH |
1257 | struct ipv6_saddr_score scores[2], |
1258 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1259 | struct ipv6_saddr_dst dst; |
072047e4 | 1260 | struct net_device *dev; |
a9b05723 | 1261 | int dst_type; |
1da177e4 | 1262 | |
a9b05723 YH |
1263 | dst_type = __ipv6_addr_type(daddr); |
1264 | dst.addr = daddr; | |
1265 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1266 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1267 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1268 | dst.prefs = prefs; |
a9b05723 YH |
1269 | |
1270 | hiscore->rule = -1; | |
1271 | hiscore->ifa = NULL; | |
1da177e4 | 1272 | |
8814c4b5 | 1273 | rcu_read_lock(); |
1da177e4 | 1274 | |
c6d14c84 | 1275 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1276 | struct inet6_dev *idev; |
072047e4 | 1277 | |
a9b05723 | 1278 | /* Candidate Source Address (section 4) |
072047e4 YH |
1279 | * - multicast and link-local destination address, |
1280 | * the set of candidate source address MUST only | |
1281 | * include addresses assigned to interfaces | |
1282 | * belonging to the same link as the outgoing | |
1283 | * interface. | |
1284 | * (- For site-local destination addresses, the | |
1285 | * set of candidate source addresses MUST only | |
1286 | * include addresses assigned to interfaces | |
1287 | * belonging to the same site as the outgoing | |
1288 | * interface.) | |
1289 | */ | |
a9b05723 YH |
1290 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1291 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1292 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1293 | continue; |
1da177e4 | 1294 | |
1da177e4 | 1295 | idev = __in6_dev_get(dev); |
072047e4 YH |
1296 | if (!idev) |
1297 | continue; | |
1298 | ||
1299 | read_lock_bh(&idev->lock); | |
502a2ffd | 1300 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1301 | int i; |
072047e4 | 1302 | |
a9b05723 | 1303 | /* |
6b3ae80a YH |
1304 | * - Tentative Address (RFC2462 section 5.4) |
1305 | * - A tentative address is not considered | |
1306 | * "assigned to an interface" in the traditional | |
95c385b4 | 1307 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1308 | * - Candidate Source Address (section 4) |
072047e4 YH |
1309 | * - In any case, anycast addresses, multicast |
1310 | * addresses, and the unspecified address MUST | |
1311 | * NOT be included in a candidate set. | |
1312 | */ | |
a9b05723 YH |
1313 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1314 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1315 | continue; |
a9b05723 YH |
1316 | |
1317 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1318 | ||
1319 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1320 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1321 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1322 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1323 | "assigned as unicast address on %s", |
1324 | dev->name); | |
1325 | continue; | |
1326 | } | |
1327 | ||
a9b05723 YH |
1328 | score->rule = -1; |
1329 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1330 | ||
1331 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1332 | int minihiscore, miniscore; | |
1333 | ||
3de23255 BT |
1334 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1335 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1336 | |
1337 | if (minihiscore > miniscore) { | |
1338 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1339 | score->scopedist > 0) { | |
1340 | /* | |
1341 | * special case: | |
1342 | * each remaining entry | |
1343 | * has too small (not enough) | |
1344 | * scope, because ifa entries | |
1345 | * are sorted by their scope | |
1346 | * values. | |
1347 | */ | |
1348 | goto try_nextdev; | |
1349 | } | |
1350 | break; | |
1351 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1352 | if (hiscore->ifa) |
1353 | in6_ifa_put(hiscore->ifa); | |
1354 | ||
1355 | in6_ifa_hold(score->ifa); | |
1356 | ||
a0bffffc | 1357 | swap(hiscore, score); |
a9b05723 YH |
1358 | |
1359 | /* restore our iterator */ | |
1360 | score->ifa = hiscore->ifa; | |
1361 | ||
1362 | break; | |
1da177e4 | 1363 | } |
072047e4 | 1364 | } |
1da177e4 | 1365 | } |
a9b05723 | 1366 | try_nextdev: |
072047e4 | 1367 | read_unlock_bh(&idev->lock); |
1da177e4 | 1368 | } |
8814c4b5 | 1369 | rcu_read_unlock(); |
1da177e4 | 1370 | |
a9b05723 | 1371 | if (!hiscore->ifa) |
072047e4 | 1372 | return -EADDRNOTAVAIL; |
1ab1457c | 1373 | |
4e3fd7a0 | 1374 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1375 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1376 | return 0; |
1da177e4 | 1377 | } |
5e5f3f0f | 1378 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1379 | |
95c385b4 NH |
1380 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1381 | unsigned char banned_flags) | |
1da177e4 LT |
1382 | { |
1383 | struct inet6_dev *idev; | |
1384 | int err = -EADDRNOTAVAIL; | |
1385 | ||
8814c4b5 | 1386 | rcu_read_lock(); |
e21e8467 SH |
1387 | idev = __in6_dev_get(dev); |
1388 | if (idev) { | |
1da177e4 LT |
1389 | struct inet6_ifaddr *ifp; |
1390 | ||
1391 | read_lock_bh(&idev->lock); | |
502a2ffd | 1392 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1393 | if (ifp->scope == IFA_LINK && | |
1394 | !(ifp->flags & banned_flags)) { | |
4e3fd7a0 | 1395 | *addr = ifp->addr; |
1da177e4 LT |
1396 | err = 0; |
1397 | break; | |
1398 | } | |
1399 | } | |
1400 | read_unlock_bh(&idev->lock); | |
1401 | } | |
8814c4b5 | 1402 | rcu_read_unlock(); |
1da177e4 LT |
1403 | return err; |
1404 | } | |
1405 | ||
1406 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1407 | { | |
1408 | int cnt = 0; | |
1409 | struct inet6_ifaddr *ifp; | |
1410 | ||
1411 | read_lock_bh(&idev->lock); | |
502a2ffd | 1412 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1413 | cnt++; |
1414 | read_unlock_bh(&idev->lock); | |
1415 | return cnt; | |
1416 | } | |
1417 | ||
b71d1d42 | 1418 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
bfeade08 | 1419 | struct net_device *dev, int strict) |
1da177e4 | 1420 | { |
eedf042a | 1421 | struct inet6_ifaddr *ifp; |
c2e21293 | 1422 | struct hlist_node *node; |
ddbe5032 | 1423 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1424 | |
5c578aed | 1425 | rcu_read_lock_bh(); |
1426 | hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { | |
878628fb | 1427 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1428 | continue; |
1da177e4 | 1429 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1430 | !(ifp->flags&IFA_F_TENTATIVE) && |
1431 | (dev == NULL || ifp->idev->dev == dev || | |
1432 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1433 | rcu_read_unlock_bh(); | |
1434 | return 1; | |
1da177e4 LT |
1435 | } |
1436 | } | |
5c578aed | 1437 | |
eedf042a SH |
1438 | rcu_read_unlock_bh(); |
1439 | return 0; | |
1da177e4 | 1440 | } |
7159039a YH |
1441 | EXPORT_SYMBOL(ipv6_chk_addr); |
1442 | ||
3e81c6da DM |
1443 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1444 | struct net_device *dev) | |
1da177e4 | 1445 | { |
ddbe5032 | 1446 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1447 | struct inet6_ifaddr *ifp; |
1448 | struct hlist_node *node; | |
1da177e4 | 1449 | |
c2e21293 | 1450 | hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1451 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1452 | continue; |
1da177e4 LT |
1453 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1454 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1455 | return true; |
1da177e4 LT |
1456 | } |
1457 | } | |
3e81c6da | 1458 | return false; |
1da177e4 LT |
1459 | } |
1460 | ||
b71d1d42 | 1461 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1462 | { |
1463 | struct inet6_dev *idev; | |
1464 | struct inet6_ifaddr *ifa; | |
1465 | int onlink; | |
1466 | ||
1467 | onlink = 0; | |
1468 | rcu_read_lock(); | |
1469 | idev = __in6_dev_get(dev); | |
1470 | if (idev) { | |
1471 | read_lock_bh(&idev->lock); | |
502a2ffd | 1472 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1473 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1474 | ifa->prefix_len); | |
1475 | if (onlink) | |
1476 | break; | |
1477 | } | |
1478 | read_unlock_bh(&idev->lock); | |
1479 | } | |
1480 | rcu_read_unlock(); | |
1481 | return onlink; | |
1482 | } | |
52eeeb84 YH |
1483 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1484 | ||
9acd9f3a | 1485 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1486 | struct net_device *dev, int strict) |
1da177e4 | 1487 | { |
b79d1d54 | 1488 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1489 | unsigned int hash = inet6_addr_hash(addr); |
b79d1d54 | 1490 | struct hlist_node *node; |
1da177e4 | 1491 | |
5c578aed | 1492 | rcu_read_lock_bh(); |
4f70ecca | 1493 | hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1494 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1495 | continue; |
1da177e4 LT |
1496 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1497 | if (dev == NULL || ifp->idev->dev == dev || | |
1498 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1499 | result = ifp; |
1da177e4 LT |
1500 | in6_ifa_hold(ifp); |
1501 | break; | |
1502 | } | |
1503 | } | |
1504 | } | |
5c578aed | 1505 | rcu_read_unlock_bh(); |
1da177e4 | 1506 | |
b79d1d54 | 1507 | return result; |
1da177e4 LT |
1508 | } |
1509 | ||
1da177e4 LT |
1510 | /* Gets referenced address, destroys ifaddr */ |
1511 | ||
cc411d0b | 1512 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1513 | { |
1da177e4 LT |
1514 | if (ifp->flags&IFA_F_PERMANENT) { |
1515 | spin_lock_bh(&ifp->lock); | |
1516 | addrconf_del_timer(ifp); | |
1517 | ifp->flags |= IFA_F_TENTATIVE; | |
cc411d0b BH |
1518 | if (dad_failed) |
1519 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1520 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1521 | if (dad_failed) |
1522 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1523 | in6_ifa_put(ifp); |
1524 | #ifdef CONFIG_IPV6_PRIVACY | |
1525 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1526 | struct inet6_ifaddr *ifpub; | |
1527 | spin_lock_bh(&ifp->lock); | |
1528 | ifpub = ifp->ifpub; | |
1529 | if (ifpub) { | |
1530 | in6_ifa_hold(ifpub); | |
1531 | spin_unlock_bh(&ifp->lock); | |
1532 | ipv6_create_tempaddr(ifpub, ifp); | |
1533 | in6_ifa_put(ifpub); | |
1534 | } else { | |
1535 | spin_unlock_bh(&ifp->lock); | |
1536 | } | |
1537 | ipv6_del_addr(ifp); | |
1538 | #endif | |
1539 | } else | |
1540 | ipv6_del_addr(ifp); | |
1541 | } | |
1542 | ||
f2344a13 HX |
1543 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1544 | { | |
1545 | int err = -ENOENT; | |
1546 | ||
1547 | spin_lock(&ifp->state_lock); | |
1548 | if (ifp->state == INET6_IFADDR_STATE_DAD) { | |
1549 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1550 | err = 0; | |
1551 | } | |
1552 | spin_unlock(&ifp->state_lock); | |
1553 | ||
1554 | return err; | |
1555 | } | |
1556 | ||
3c21edbd YH |
1557 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1558 | { | |
1b34be74 | 1559 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1560 | |
853dc2e0 UB |
1561 | if (addrconf_dad_end(ifp)) { |
1562 | in6_ifa_put(ifp); | |
f2344a13 | 1563 | return; |
853dc2e0 | 1564 | } |
f2344a13 | 1565 | |
e87cc472 JP |
1566 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1567 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1568 | |
1b34be74 YH |
1569 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1570 | struct in6_addr addr; | |
1571 | ||
1572 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1573 | addr.s6_addr32[1] = 0; | |
1574 | ||
1575 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1576 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1577 | /* DAD failed for link-local based on MAC address */ | |
1578 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1579 | |
f3213831 | 1580 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1581 | ifp->idev->dev->name); |
1b34be74 YH |
1582 | } |
1583 | } | |
1584 | ||
cc411d0b | 1585 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1586 | } |
1da177e4 LT |
1587 | |
1588 | /* Join to solicited addr multicast group. */ | |
1589 | ||
b71d1d42 | 1590 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1591 | { |
1592 | struct in6_addr maddr; | |
1593 | ||
1594 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1595 | return; | |
1596 | ||
1597 | addrconf_addr_solict_mult(addr, &maddr); | |
1598 | ipv6_dev_mc_inc(dev, &maddr); | |
1599 | } | |
1600 | ||
b71d1d42 | 1601 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1602 | { |
1603 | struct in6_addr maddr; | |
1604 | ||
1605 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1606 | return; | |
1607 | ||
1608 | addrconf_addr_solict_mult(addr, &maddr); | |
1609 | __ipv6_dev_mc_dec(idev, &maddr); | |
1610 | } | |
1611 | ||
20380731 | 1612 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1613 | { |
1614 | struct in6_addr addr; | |
2bda8a0c BM |
1615 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1616 | return; | |
1da177e4 LT |
1617 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1618 | if (ipv6_addr_any(&addr)) | |
1619 | return; | |
1620 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1621 | } | |
1622 | ||
20380731 | 1623 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1624 | { |
1625 | struct in6_addr addr; | |
32019e65 YH |
1626 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1627 | return; | |
1da177e4 LT |
1628 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1629 | if (ipv6_addr_any(&addr)) | |
1630 | return; | |
1631 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1632 | } | |
1633 | ||
073a8e0e YH |
1634 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1635 | { | |
1636 | if (dev->addr_len != ETH_ALEN) | |
1637 | return -1; | |
1638 | memcpy(eui, dev->dev_addr, 3); | |
1639 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1640 | ||
1641 | /* | |
1642 | * The zSeries OSA network cards can be shared among various | |
1643 | * OS instances, but the OSA cards have only one MAC address. | |
1644 | * This leads to duplicate address conflicts in conjunction | |
1645 | * with IPv6 if more than one instance uses the same card. | |
1646 | * | |
1647 | * The driver for these cards can deliver a unique 16-bit | |
1648 | * identifier for each instance sharing the same card. It is | |
1649 | * placed instead of 0xFFFE in the interface identifier. The | |
1650 | * "u" bit of the interface identifier is not inverted in this | |
1651 | * case. Hence the resulting interface identifier has local | |
1652 | * scope according to RFC2373. | |
1653 | */ | |
1654 | if (dev->dev_id) { | |
1655 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1656 | eui[4] = dev->dev_id & 0xFF; | |
1657 | } else { | |
1658 | eui[3] = 0xFF; | |
1659 | eui[4] = 0xFE; | |
1660 | eui[0] ^= 2; | |
1661 | } | |
1662 | return 0; | |
1663 | } | |
1664 | ||
06a4c1c5 | 1665 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1666 | { | |
1667 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1668 | return -1; | |
1669 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1670 | eui[0] ^= 2; |
06a4c1c5 | 1671 | return 0; |
1672 | } | |
1673 | ||
073a8e0e YH |
1674 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1675 | { | |
1676 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1677 | if (dev->addr_len != ARCNET_ALEN) | |
1678 | return -1; | |
1679 | memset(eui, 0, 7); | |
8e5e8f30 | 1680 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1681 | return 0; |
1682 | } | |
1683 | ||
1684 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1685 | { | |
1686 | if (dev->addr_len != INFINIBAND_ALEN) | |
1687 | return -1; | |
1688 | memcpy(eui, dev->dev_addr + 12, 8); | |
1689 | eui[0] |= 2; | |
1690 | return 0; | |
1691 | } | |
1692 | ||
c61393ea | 1693 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1694 | { |
9af28511 SH |
1695 | if (addr == 0) |
1696 | return -1; | |
dfd982ba YH |
1697 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1698 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1699 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1700 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1701 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1702 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1703 | eui[1] = 0; | |
1704 | eui[2] = 0x5E; | |
1705 | eui[3] = 0xFE; | |
1706 | memcpy(eui + 4, &addr, 4); | |
1707 | return 0; | |
1708 | } | |
dfd982ba YH |
1709 | |
1710 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1711 | { | |
1712 | if (dev->priv_flags & IFF_ISATAP) | |
1713 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1714 | return -1; | |
1715 | } | |
1716 | ||
aee80b54 | 1717 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1718 | { | |
1719 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1720 | } | |
1721 | ||
1da177e4 LT |
1722 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1723 | { | |
1724 | switch (dev->type) { | |
1725 | case ARPHRD_ETHER: | |
1726 | case ARPHRD_FDDI: | |
073a8e0e | 1727 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1728 | case ARPHRD_ARCNET: |
073a8e0e | 1729 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1730 | case ARPHRD_INFINIBAND: |
073a8e0e | 1731 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1732 | case ARPHRD_SIT: |
dfd982ba | 1733 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1734 | case ARPHRD_IPGRE: |
1735 | return addrconf_ifid_gre(eui, dev); | |
06a4c1c5 | 1736 | case ARPHRD_IEEE802154: |
1737 | return addrconf_ifid_eui64(eui, dev); | |
1da177e4 LT |
1738 | } |
1739 | return -1; | |
1740 | } | |
1741 | ||
1742 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1743 | { | |
1744 | int err = -1; | |
1745 | struct inet6_ifaddr *ifp; | |
1746 | ||
1747 | read_lock_bh(&idev->lock); | |
502a2ffd | 1748 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1749 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1750 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1751 | err = 0; | |
1752 | break; | |
1753 | } | |
1754 | } | |
1755 | read_unlock_bh(&idev->lock); | |
1756 | return err; | |
1757 | } | |
1758 | ||
1759 | #ifdef CONFIG_IPV6_PRIVACY | |
1760 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
eb7e0575 | 1761 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1762 | { |
1da177e4 | 1763 | regen: |
955189ef | 1764 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1765 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1766 | |
1767 | /* | |
1768 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1769 | * check if generated address is not inappropriate | |
1770 | * | |
1771 | * - Reserved subnet anycast (RFC 2526) | |
1772 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1773 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1774 | * 00-00-5E-FE-xx-xx-xx-xx |
1775 | * - value 0 | |
1776 | * - XXX: already assigned to an address on the device | |
1777 | */ | |
1ab1457c | 1778 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1779 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1780 | (idev->rndid[7]&0x80)) | |
1781 | goto regen; | |
1782 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1783 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1784 | goto regen; | |
1785 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1786 | goto regen; | |
1787 | } | |
1da177e4 LT |
1788 | } |
1789 | ||
1790 | static void ipv6_regen_rndid(unsigned long data) | |
1791 | { | |
1792 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1793 | unsigned long expires; | |
1794 | ||
8814c4b5 | 1795 | rcu_read_lock_bh(); |
1da177e4 LT |
1796 | write_lock_bh(&idev->lock); |
1797 | ||
1798 | if (idev->dead) | |
1799 | goto out; | |
1800 | ||
eb7e0575 | 1801 | __ipv6_regen_rndid(idev); |
1ab1457c | 1802 | |
1da177e4 | 1803 | expires = jiffies + |
1ab1457c | 1804 | idev->cnf.temp_prefered_lft * HZ - |
784e2710 BH |
1805 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
1806 | idev->cnf.max_desync_factor * HZ; | |
1da177e4 | 1807 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1808 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1809 | __func__, idev->dev->name); | |
1da177e4 LT |
1810 | goto out; |
1811 | } | |
1812 | ||
1813 | if (!mod_timer(&idev->regen_timer, expires)) | |
1814 | in6_dev_hold(idev); | |
1815 | ||
1816 | out: | |
1817 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1818 | rcu_read_unlock_bh(); |
1da177e4 LT |
1819 | in6_dev_put(idev); |
1820 | } | |
1821 | ||
eb7e0575 | 1822 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 1823 | { |
1da177e4 | 1824 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 1825 | __ipv6_regen_rndid(idev); |
1da177e4 LT |
1826 | } |
1827 | #endif | |
1828 | ||
1829 | /* | |
1830 | * Add prefix route. | |
1831 | */ | |
1832 | ||
1833 | static void | |
1834 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1835 | unsigned long expires, u32 flags) |
1da177e4 | 1836 | { |
86872cb5 TG |
1837 | struct fib6_config cfg = { |
1838 | .fc_table = RT6_TABLE_PREFIX, | |
1839 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1840 | .fc_ifindex = dev->ifindex, | |
1841 | .fc_expires = expires, | |
1842 | .fc_dst_len = plen, | |
1843 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1844 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1845 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1846 | }; |
1da177e4 | 1847 | |
4e3fd7a0 | 1848 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1849 | |
1850 | /* Prevent useless cloning on PtP SIT. | |
1851 | This thing is done here expecting that the whole | |
1852 | class of non-broadcast devices need not cloning. | |
1853 | */ | |
07a93626 | 1854 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
1855 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1856 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1857 | #endif |
1da177e4 | 1858 | |
86872cb5 | 1859 | ip6_route_add(&cfg); |
1da177e4 LT |
1860 | } |
1861 | ||
14ef37b6 AH |
1862 | |
1863 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
1864 | int plen, | |
1865 | const struct net_device *dev, | |
1866 | u32 flags, u32 noflags) | |
1867 | { | |
1868 | struct fib6_node *fn; | |
1869 | struct rt6_info *rt = NULL; | |
1870 | struct fib6_table *table; | |
1871 | ||
1872 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
1873 | if (table == NULL) | |
1874 | return NULL; | |
1875 | ||
5744dd9b | 1876 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
1877 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
1878 | if (!fn) | |
1879 | goto out; | |
1880 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 1881 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
1882 | continue; |
1883 | if ((rt->rt6i_flags & flags) != flags) | |
1884 | continue; | |
85da53bf | 1885 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
1886 | continue; |
1887 | dst_hold(&rt->dst); | |
1888 | break; | |
1889 | } | |
1890 | out: | |
5744dd9b | 1891 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
1892 | return rt; |
1893 | } | |
1894 | ||
1895 | ||
1da177e4 LT |
1896 | /* Create "default" multicast route to the interface */ |
1897 | ||
1898 | static void addrconf_add_mroute(struct net_device *dev) | |
1899 | { | |
86872cb5 TG |
1900 | struct fib6_config cfg = { |
1901 | .fc_table = RT6_TABLE_LOCAL, | |
1902 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1903 | .fc_ifindex = dev->ifindex, | |
1904 | .fc_dst_len = 8, | |
1905 | .fc_flags = RTF_UP, | |
c346dca1 | 1906 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
1907 | }; |
1908 | ||
1909 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
1910 | ||
1911 | ip6_route_add(&cfg); | |
1da177e4 LT |
1912 | } |
1913 | ||
07a93626 | 1914 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
1915 | static void sit_route_add(struct net_device *dev) |
1916 | { | |
86872cb5 TG |
1917 | struct fib6_config cfg = { |
1918 | .fc_table = RT6_TABLE_MAIN, | |
1919 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1920 | .fc_ifindex = dev->ifindex, | |
1921 | .fc_dst_len = 96, | |
1922 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 1923 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1924 | }; |
1da177e4 LT |
1925 | |
1926 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 1927 | ip6_route_add(&cfg); |
1da177e4 | 1928 | } |
0be669bb | 1929 | #endif |
1da177e4 | 1930 | |
1da177e4 LT |
1931 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
1932 | { | |
1933 | struct inet6_dev *idev; | |
1934 | ||
1935 | ASSERT_RTNL(); | |
1936 | ||
e21e8467 SH |
1937 | idev = ipv6_find_idev(dev); |
1938 | if (!idev) | |
64e724f6 BH |
1939 | return ERR_PTR(-ENOBUFS); |
1940 | ||
1941 | if (idev->cnf.disable_ipv6) | |
1942 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
1943 | |
1944 | /* Add default multicast route */ | |
4af04aba LW |
1945 | if (!(dev->flags & IFF_LOOPBACK)) |
1946 | addrconf_add_mroute(dev); | |
1da177e4 | 1947 | |
1da177e4 LT |
1948 | return idev; |
1949 | } | |
1950 | ||
e6bff995 | 1951 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
1952 | { |
1953 | struct prefix_info *pinfo; | |
1954 | __u32 valid_lft; | |
1955 | __u32 prefered_lft; | |
1956 | int addr_type; | |
1da177e4 | 1957 | struct inet6_dev *in6_dev; |
56d417b1 | 1958 | struct net *net = dev_net(dev); |
1da177e4 LT |
1959 | |
1960 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 1961 | |
1da177e4 LT |
1962 | if (len < sizeof(struct prefix_info)) { |
1963 | ADBG(("addrconf: prefix option too short\n")); | |
1964 | return; | |
1965 | } | |
1ab1457c | 1966 | |
1da177e4 LT |
1967 | /* |
1968 | * Validation checks ([ADDRCONF], page 19) | |
1969 | */ | |
1970 | ||
1971 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
1972 | ||
1973 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
1974 | return; | |
1975 | ||
1976 | valid_lft = ntohl(pinfo->valid); | |
1977 | prefered_lft = ntohl(pinfo->prefered); | |
1978 | ||
1979 | if (prefered_lft > valid_lft) { | |
e87cc472 | 1980 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
1981 | return; |
1982 | } | |
1983 | ||
1984 | in6_dev = in6_dev_get(dev); | |
1985 | ||
1986 | if (in6_dev == NULL) { | |
e87cc472 JP |
1987 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
1988 | dev->name); | |
1da177e4 LT |
1989 | return; |
1990 | } | |
1991 | ||
1992 | /* | |
1993 | * Two things going on here: | |
1994 | * 1) Add routes for on-link prefixes | |
1995 | * 2) Configure prefixes with the auto flag set | |
1996 | */ | |
1997 | ||
4bed72e4 YH |
1998 | if (pinfo->onlink) { |
1999 | struct rt6_info *rt; | |
2000 | unsigned long rt_expires; | |
2001 | ||
6f704992 YH |
2002 | /* Avoid arithmetic overflow. Really, we could |
2003 | * save rt_expires in seconds, likely valid_lft, | |
2004 | * but it would require division in fib gc, that it | |
2005 | * not good. | |
2006 | */ | |
4bed72e4 YH |
2007 | if (HZ > USER_HZ) |
2008 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2009 | else | |
2010 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2011 | |
4bed72e4 YH |
2012 | if (addrconf_finite_timeout(rt_expires)) |
2013 | rt_expires *= HZ; | |
1da177e4 | 2014 | |
14ef37b6 AH |
2015 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2016 | pinfo->prefix_len, | |
2017 | dev, | |
2018 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2019 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2020 | |
14ef37b6 | 2021 | if (rt) { |
6f704992 YH |
2022 | /* Autoconf prefix route */ |
2023 | if (valid_lft == 0) { | |
2024 | ip6_del_rt(rt); | |
2025 | rt = NULL; | |
4bed72e4 | 2026 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2027 | /* not infinity */ |
1716a961 | 2028 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2029 | } else { |
1716a961 | 2030 | rt6_clean_expires(rt); |
1da177e4 LT |
2031 | } |
2032 | } else if (valid_lft) { | |
6f704992 | 2033 | clock_t expires = 0; |
4bed72e4 YH |
2034 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2035 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2036 | /* not infinity */ |
2037 | flags |= RTF_EXPIRES; | |
2038 | expires = jiffies_to_clock_t(rt_expires); | |
2039 | } | |
1da177e4 | 2040 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2041 | dev, expires, flags); |
1da177e4 | 2042 | } |
94e187c0 | 2043 | ip6_rt_put(rt); |
1da177e4 LT |
2044 | } |
2045 | ||
2046 | /* Try to figure out our local address for this prefix */ | |
2047 | ||
2048 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2049 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2050 | struct in6_addr addr; |
2051 | int create = 0, update_lft = 0; | |
2052 | ||
2053 | if (pinfo->prefix_len == 64) { | |
2054 | memcpy(&addr, &pinfo->prefix, 8); | |
2055 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && | |
2056 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
2057 | in6_dev_put(in6_dev); | |
2058 | return; | |
2059 | } | |
2060 | goto ok; | |
2061 | } | |
e87cc472 JP |
2062 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2063 | pinfo->prefix_len); | |
1da177e4 LT |
2064 | in6_dev_put(in6_dev); |
2065 | return; | |
2066 | ||
2067 | ok: | |
2068 | ||
53b7997f | 2069 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2070 | |
2071 | if (ifp == NULL && valid_lft) { | |
2072 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2073 | u32 addr_flags = 0; |
2074 | ||
2075 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2076 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2077 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2078 | addr_flags = IFA_F_OPTIMISTIC; |
2079 | #endif | |
1da177e4 LT |
2080 | |
2081 | /* Do not allow to create too much of autoconfigured | |
2082 | * addresses; this would be too easy way to crash kernel. | |
2083 | */ | |
2084 | if (!max_addresses || | |
2085 | ipv6_count_addresses(in6_dev) < max_addresses) | |
2086 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
2087 | addr_type&IPV6_ADDR_SCOPE_MASK, |
2088 | addr_flags); | |
1da177e4 | 2089 | |
3f0d2ba0 | 2090 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2091 | in6_dev_put(in6_dev); |
2092 | return; | |
2093 | } | |
2094 | ||
2095 | update_lft = create = 1; | |
2096 | ifp->cstamp = jiffies; | |
cf22f9a2 | 2097 | addrconf_dad_start(ifp); |
1da177e4 LT |
2098 | } |
2099 | ||
2100 | if (ifp) { | |
2101 | int flags; | |
2102 | unsigned long now; | |
2103 | #ifdef CONFIG_IPV6_PRIVACY | |
2104 | struct inet6_ifaddr *ift; | |
2105 | #endif | |
2106 | u32 stored_lft; | |
2107 | ||
2108 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2109 | spin_lock(&ifp->lock); | |
2110 | now = jiffies; | |
2111 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2112 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2113 | else | |
2114 | stored_lft = 0; | |
2115 | if (!update_lft && stored_lft) { | |
2116 | if (valid_lft > MIN_VALID_LIFETIME || | |
2117 | valid_lft > stored_lft) | |
2118 | update_lft = 1; | |
2119 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
2120 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
2121 | /* |
2122 | * RFC 4862 Section 5.5.3e: | |
2123 | * "Note that the preferred lifetime of | |
2124 | * the corresponding address is always | |
2125 | * reset to the Preferred Lifetime in | |
2126 | * the received Prefix Information | |
2127 | * option, regardless of whether the | |
2128 | * valid lifetime is also reset or | |
2129 | * ignored." | |
2130 | * | |
2131 | * So if the preferred lifetime in | |
2132 | * this advertisement is different | |
2133 | * than what we have stored, but the | |
2134 | * valid lifetime is invalid, just | |
2135 | * reset prefered_lft. | |
2136 | * | |
2137 | * We must set the valid lifetime | |
2138 | * to the stored lifetime since we'll | |
2139 | * be updating the timestamp below, | |
2140 | * else we'll set it back to the | |
25985edc | 2141 | * minimum. |
a1ed0526 BH |
2142 | */ |
2143 | if (prefered_lft != ifp->prefered_lft) { | |
2144 | valid_lft = stored_lft; | |
2145 | update_lft = 1; | |
2146 | } | |
1da177e4 LT |
2147 | } else { |
2148 | valid_lft = MIN_VALID_LIFETIME; | |
2149 | if (valid_lft < prefered_lft) | |
2150 | prefered_lft = valid_lft; | |
2151 | update_lft = 1; | |
2152 | } | |
2153 | } | |
2154 | ||
2155 | if (update_lft) { | |
2156 | ifp->valid_lft = valid_lft; | |
2157 | ifp->prefered_lft = prefered_lft; | |
2158 | ifp->tstamp = now; | |
2159 | flags = ifp->flags; | |
2160 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2161 | spin_unlock(&ifp->lock); | |
2162 | ||
2163 | if (!(flags&IFA_F_TENTATIVE)) | |
2164 | ipv6_ifa_notify(0, ifp); | |
2165 | } else | |
2166 | spin_unlock(&ifp->lock); | |
2167 | ||
2168 | #ifdef CONFIG_IPV6_PRIVACY | |
2169 | read_lock_bh(&in6_dev->lock); | |
2170 | /* update all temporary addresses in the list */ | |
76f793e3 LC |
2171 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
2172 | tmp_list) { | |
2173 | int age, max_valid, max_prefered; | |
2174 | ||
c6fbfac2 BB |
2175 | if (ifp != ift->ifpub) |
2176 | continue; | |
2177 | ||
76f793e3 LC |
2178 | /* |
2179 | * RFC 4941 section 3.3: | |
2180 | * If a received option will extend the lifetime | |
2181 | * of a public address, the lifetimes of | |
2182 | * temporary addresses should be extended, | |
2183 | * subject to the overall constraint that no | |
2184 | * temporary addresses should ever remain | |
2185 | * "valid" or "preferred" for a time longer than | |
2186 | * (TEMP_VALID_LIFETIME) or | |
2187 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), | |
2188 | * respectively. | |
2189 | */ | |
2190 | age = (now - ift->cstamp) / HZ; | |
2191 | max_valid = in6_dev->cnf.temp_valid_lft - age; | |
2192 | if (max_valid < 0) | |
2193 | max_valid = 0; | |
2194 | ||
2195 | max_prefered = in6_dev->cnf.temp_prefered_lft - | |
2196 | in6_dev->cnf.max_desync_factor - | |
2197 | age; | |
2198 | if (max_prefered < 0) | |
2199 | max_prefered = 0; | |
2200 | ||
2201 | if (valid_lft > max_valid) | |
2202 | valid_lft = max_valid; | |
2203 | ||
2204 | if (prefered_lft > max_prefered) | |
2205 | prefered_lft = max_prefered; | |
2206 | ||
1da177e4 LT |
2207 | spin_lock(&ift->lock); |
2208 | flags = ift->flags; | |
76f793e3 LC |
2209 | ift->valid_lft = valid_lft; |
2210 | ift->prefered_lft = prefered_lft; | |
2211 | ift->tstamp = now; | |
2212 | if (prefered_lft > 0) | |
2213 | ift->flags &= ~IFA_F_DEPRECATED; | |
2214 | ||
1da177e4 LT |
2215 | spin_unlock(&ift->lock); |
2216 | if (!(flags&IFA_F_TENTATIVE)) | |
2217 | ipv6_ifa_notify(0, ift); | |
2218 | } | |
2219 | ||
aed65501 | 2220 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4 | 2221 | /* |
76f793e3 LC |
2222 | * When a new public address is created as |
2223 | * described in [ADDRCONF], also create a new | |
2224 | * temporary address. Also create a temporary | |
2225 | * address if it's enabled but no temporary | |
2226 | * address currently exists. | |
1da177e4 | 2227 | */ |
1ab1457c | 2228 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2229 | ipv6_create_tempaddr(ifp, NULL); |
2230 | } else { | |
2231 | read_unlock_bh(&in6_dev->lock); | |
2232 | } | |
2233 | #endif | |
2234 | in6_ifa_put(ifp); | |
2235 | addrconf_verify(0); | |
2236 | } | |
2237 | } | |
2238 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2239 | in6_dev_put(in6_dev); | |
2240 | } | |
2241 | ||
2242 | /* | |
2243 | * Set destination address. | |
2244 | * Special case for SIT interfaces where we create a new "virtual" | |
2245 | * device. | |
2246 | */ | |
af284937 | 2247 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2248 | { |
2249 | struct in6_ifreq ireq; | |
2250 | struct net_device *dev; | |
2251 | int err = -EINVAL; | |
2252 | ||
2253 | rtnl_lock(); | |
2254 | ||
2255 | err = -EFAULT; | |
2256 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2257 | goto err_exit; | |
2258 | ||
af284937 | 2259 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2260 | |
2261 | err = -ENODEV; | |
2262 | if (dev == NULL) | |
2263 | goto err_exit; | |
2264 | ||
07a93626 | 2265 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2266 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2267 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2268 | struct ifreq ifr; |
1da177e4 LT |
2269 | struct ip_tunnel_parm p; |
2270 | ||
2271 | err = -EADDRNOTAVAIL; | |
2272 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2273 | goto err_exit; | |
2274 | ||
2275 | memset(&p, 0, sizeof(p)); | |
2276 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2277 | p.iph.saddr = 0; | |
2278 | p.iph.version = 4; | |
2279 | p.iph.ihl = 5; | |
2280 | p.iph.protocol = IPPROTO_IPV6; | |
2281 | p.iph.ttl = 64; | |
d20b3109 | 2282 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2283 | |
5bc3eb7e SH |
2284 | if (ops->ndo_do_ioctl) { |
2285 | mm_segment_t oldfs = get_fs(); | |
2286 | ||
2287 | set_fs(KERNEL_DS); | |
2288 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2289 | set_fs(oldfs); | |
2290 | } else | |
2291 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2292 | |
2293 | if (err == 0) { | |
2294 | err = -ENOBUFS; | |
af284937 DL |
2295 | dev = __dev_get_by_name(net, p.name); |
2296 | if (!dev) | |
1da177e4 LT |
2297 | goto err_exit; |
2298 | err = dev_open(dev); | |
2299 | } | |
2300 | } | |
0be669bb | 2301 | #endif |
1da177e4 LT |
2302 | |
2303 | err_exit: | |
2304 | rtnl_unlock(); | |
2305 | return err; | |
2306 | } | |
2307 | ||
2308 | /* | |
2309 | * Manual configuration of address on an interface | |
2310 | */ | |
b71d1d42 | 2311 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2312 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2313 | __u32 valid_lft) |
1da177e4 LT |
2314 | { |
2315 | struct inet6_ifaddr *ifp; | |
2316 | struct inet6_dev *idev; | |
2317 | struct net_device *dev; | |
2318 | int scope; | |
6f704992 YH |
2319 | u32 flags; |
2320 | clock_t expires; | |
4bed72e4 | 2321 | unsigned long timeout; |
1da177e4 LT |
2322 | |
2323 | ASSERT_RTNL(); | |
1ab1457c | 2324 | |
24ef0da7 TG |
2325 | if (plen > 128) |
2326 | return -EINVAL; | |
2327 | ||
0778769d NT |
2328 | /* check the lifetime */ |
2329 | if (!valid_lft || prefered_lft > valid_lft) | |
2330 | return -EINVAL; | |
2331 | ||
af284937 DL |
2332 | dev = __dev_get_by_index(net, ifindex); |
2333 | if (!dev) | |
1da177e4 | 2334 | return -ENODEV; |
1ab1457c | 2335 | |
64e724f6 BH |
2336 | idev = addrconf_add_dev(dev); |
2337 | if (IS_ERR(idev)) | |
2338 | return PTR_ERR(idev); | |
1da177e4 LT |
2339 | |
2340 | scope = ipv6_addr_scope(pfx); | |
2341 | ||
4bed72e4 YH |
2342 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2343 | if (addrconf_finite_timeout(timeout)) { | |
2344 | expires = jiffies_to_clock_t(timeout * HZ); | |
2345 | valid_lft = timeout; | |
6f704992 | 2346 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2347 | } else { |
2348 | expires = 0; | |
2349 | flags = 0; | |
2350 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2351 | } |
0778769d | 2352 | |
4bed72e4 YH |
2353 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2354 | if (addrconf_finite_timeout(timeout)) { | |
2355 | if (timeout == 0) | |
2356 | ifa_flags |= IFA_F_DEPRECATED; | |
2357 | prefered_lft = timeout; | |
2358 | } | |
0778769d NT |
2359 | |
2360 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2361 | ||
1da177e4 | 2362 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2363 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2364 | ifp->valid_lft = valid_lft; |
2365 | ifp->prefered_lft = prefered_lft; | |
2366 | ifp->tstamp = jiffies; | |
06aebfb7 | 2367 | spin_unlock_bh(&ifp->lock); |
0778769d | 2368 | |
46d48046 | 2369 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2370 | expires, flags); |
95c385b4 NH |
2371 | /* |
2372 | * Note that section 3.1 of RFC 4429 indicates | |
2373 | * that the Optimistic flag should not be set for | |
2374 | * manually configured addresses | |
2375 | */ | |
cf22f9a2 | 2376 | addrconf_dad_start(ifp); |
1da177e4 | 2377 | in6_ifa_put(ifp); |
0778769d | 2378 | addrconf_verify(0); |
1da177e4 LT |
2379 | return 0; |
2380 | } | |
2381 | ||
2382 | return PTR_ERR(ifp); | |
2383 | } | |
2384 | ||
b71d1d42 | 2385 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2386 | unsigned int plen) |
1da177e4 LT |
2387 | { |
2388 | struct inet6_ifaddr *ifp; | |
2389 | struct inet6_dev *idev; | |
2390 | struct net_device *dev; | |
1ab1457c | 2391 | |
24ef0da7 TG |
2392 | if (plen > 128) |
2393 | return -EINVAL; | |
2394 | ||
af284937 DL |
2395 | dev = __dev_get_by_index(net, ifindex); |
2396 | if (!dev) | |
1da177e4 LT |
2397 | return -ENODEV; |
2398 | ||
2399 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2400 | return -ENXIO; | |
2401 | ||
2402 | read_lock_bh(&idev->lock); | |
502a2ffd | 2403 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2404 | if (ifp->prefix_len == plen && |
2405 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2406 | in6_ifa_hold(ifp); | |
2407 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2408 | |
1da177e4 LT |
2409 | ipv6_del_addr(ifp); |
2410 | ||
2411 | /* If the last address is deleted administratively, | |
2412 | disable IPv6 on this interface. | |
2413 | */ | |
502a2ffd | 2414 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2415 | addrconf_ifdown(idev->dev, 1); |
2416 | return 0; | |
2417 | } | |
2418 | } | |
2419 | read_unlock_bh(&idev->lock); | |
2420 | return -EADDRNOTAVAIL; | |
2421 | } | |
2422 | ||
2423 | ||
af284937 | 2424 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2425 | { |
2426 | struct in6_ifreq ireq; | |
2427 | int err; | |
1ab1457c | 2428 | |
af31f412 | 2429 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2430 | return -EPERM; |
1ab1457c | 2431 | |
1da177e4 LT |
2432 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2433 | return -EFAULT; | |
2434 | ||
2435 | rtnl_lock(); | |
af284937 DL |
2436 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2437 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2438 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2439 | rtnl_unlock(); |
2440 | return err; | |
2441 | } | |
2442 | ||
af284937 | 2443 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2444 | { |
2445 | struct in6_ifreq ireq; | |
2446 | int err; | |
1ab1457c | 2447 | |
af31f412 | 2448 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2449 | return -EPERM; |
2450 | ||
2451 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2452 | return -EFAULT; | |
2453 | ||
2454 | rtnl_lock(); | |
af284937 DL |
2455 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2456 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2457 | rtnl_unlock(); |
2458 | return err; | |
2459 | } | |
2460 | ||
b5f348e5 IJ |
2461 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2462 | int plen, int scope) | |
2463 | { | |
2464 | struct inet6_ifaddr *ifp; | |
2465 | ||
2466 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2467 | if (!IS_ERR(ifp)) { | |
2468 | spin_lock_bh(&ifp->lock); | |
2469 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2470 | spin_unlock_bh(&ifp->lock); | |
2471 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2472 | in6_ifa_put(ifp); | |
2473 | } | |
2474 | } | |
2475 | ||
07a93626 | 2476 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2477 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2478 | { | |
1da177e4 LT |
2479 | struct in6_addr addr; |
2480 | struct net_device *dev; | |
c346dca1 | 2481 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2482 | int scope; |
2483 | ||
2484 | ASSERT_RTNL(); | |
2485 | ||
2486 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2487 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2488 | ||
2489 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2490 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2491 | scope = IFA_LINK; | |
2492 | } else { | |
2493 | scope = IPV6_ADDR_COMPATv4; | |
2494 | } | |
2495 | ||
2496 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2497 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2498 | return; |
2499 | } | |
2500 | ||
6fda7350 | 2501 | for_each_netdev(net, dev) { |
8e5e8f30 | 2502 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2503 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2504 | struct in_ifaddr *ifa; |
1da177e4 LT |
2505 | |
2506 | int flag = scope; | |
2507 | ||
2508 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2509 | int plen; | |
2510 | ||
2511 | addr.s6_addr32[3] = ifa->ifa_local; | |
2512 | ||
2513 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2514 | continue; | |
2515 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2516 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2517 | continue; | |
2518 | flag |= IFA_HOST; | |
2519 | } | |
2520 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2521 | plen = 64; | |
2522 | else | |
2523 | plen = 96; | |
2524 | ||
b5f348e5 | 2525 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2526 | } |
2527 | } | |
1ab1457c | 2528 | } |
1da177e4 | 2529 | } |
0be669bb | 2530 | #endif |
1da177e4 LT |
2531 | |
2532 | static void init_loopback(struct net_device *dev) | |
2533 | { | |
2534 | struct inet6_dev *idev; | |
1da177e4 LT |
2535 | |
2536 | /* ::1 */ | |
2537 | ||
2538 | ASSERT_RTNL(); | |
2539 | ||
2540 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2541 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2542 | return; |
2543 | } | |
2544 | ||
b5f348e5 | 2545 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4 LT |
2546 | } |
2547 | ||
b71d1d42 | 2548 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2549 | { |
8e5e8f30 | 2550 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2551 | u32 addr_flags = IFA_F_PERMANENT; |
2552 | ||
2553 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2554 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2555 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2556 | addr_flags |= IFA_F_OPTIMISTIC; |
2557 | #endif | |
1da177e4 | 2558 | |
95c385b4 NH |
2559 | |
2560 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2561 | if (!IS_ERR(ifp)) { |
46d48046 | 2562 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2563 | addrconf_dad_start(ifp); |
1da177e4 LT |
2564 | in6_ifa_put(ifp); |
2565 | } | |
2566 | } | |
2567 | ||
2568 | static void addrconf_dev_config(struct net_device *dev) | |
2569 | { | |
2570 | struct in6_addr addr; | |
8e5e8f30 | 2571 | struct inet6_dev *idev; |
1da177e4 LT |
2572 | |
2573 | ASSERT_RTNL(); | |
2574 | ||
74235a25 HX |
2575 | if ((dev->type != ARPHRD_ETHER) && |
2576 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2577 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2578 | (dev->type != ARPHRD_INFINIBAND) && |
2579 | (dev->type != ARPHRD_IEEE802154)) { | |
74235a25 HX |
2580 | /* Alas, we support only Ethernet autoconfiguration. */ |
2581 | return; | |
2582 | } | |
2583 | ||
1da177e4 | 2584 | idev = addrconf_add_dev(dev); |
64e724f6 | 2585 | if (IS_ERR(idev)) |
1da177e4 LT |
2586 | return; |
2587 | ||
2588 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2589 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2590 | ||
2591 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2592 | addrconf_add_linklocal(idev, &addr); | |
2593 | } | |
2594 | ||
07a93626 | 2595 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2596 | static void addrconf_sit_config(struct net_device *dev) |
2597 | { | |
2598 | struct inet6_dev *idev; | |
2599 | ||
2600 | ASSERT_RTNL(); | |
2601 | ||
1ab1457c YH |
2602 | /* |
2603 | * Configure the tunnel with one of our IPv4 | |
2604 | * addresses... we should configure all of | |
1da177e4 LT |
2605 | * our v4 addrs in the tunnel |
2606 | */ | |
2607 | ||
2608 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2609 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2610 | return; |
2611 | } | |
2612 | ||
c7dc89c0 FT |
2613 | if (dev->priv_flags & IFF_ISATAP) { |
2614 | struct in6_addr addr; | |
2615 | ||
2616 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2617 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2618 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2619 | addrconf_add_linklocal(idev, &addr); | |
2620 | return; | |
2621 | } | |
2622 | ||
1da177e4 LT |
2623 | sit_add_v4_addrs(idev); |
2624 | ||
62b54dd9 | 2625 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2626 | addrconf_add_mroute(dev); |
62b54dd9 | 2627 | else |
1da177e4 LT |
2628 | sit_route_add(dev); |
2629 | } | |
0be669bb | 2630 | #endif |
1da177e4 | 2631 | |
07a93626 | 2632 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2633 | static void addrconf_gre_config(struct net_device *dev) |
2634 | { | |
2635 | struct inet6_dev *idev; | |
2636 | struct in6_addr addr; | |
2637 | ||
f3213831 | 2638 | pr_info("%s(%s)\n", __func__, dev->name); |
aee80b54 | 2639 | |
2640 | ASSERT_RTNL(); | |
2641 | ||
2642 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2643 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2644 | return; |
2645 | } | |
2646 | ||
2647 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2648 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2649 | ||
2650 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2651 | addrconf_add_linklocal(idev, &addr); | |
2652 | } | |
2653 | #endif | |
2654 | ||
1da177e4 LT |
2655 | static inline int |
2656 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2657 | { | |
2658 | struct in6_addr lladdr; | |
2659 | ||
95c385b4 | 2660 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2661 | addrconf_add_linklocal(idev, &lladdr); |
2662 | return 0; | |
2663 | } | |
2664 | return -1; | |
2665 | } | |
2666 | ||
2667 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2668 | { | |
2669 | struct net_device *link_dev; | |
c346dca1 | 2670 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2671 | |
2672 | /* first try to inherit the link-local address from the link device */ | |
2673 | if (idev->dev->iflink && | |
6fda7350 | 2674 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2675 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2676 | return; | |
2677 | } | |
2678 | /* then try to inherit it from any device */ | |
6fda7350 | 2679 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2680 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2681 | return; | |
2682 | } | |
91df42be | 2683 | pr_debug("init ip6-ip6: add_linklocal failed\n"); |
1da177e4 LT |
2684 | } |
2685 | ||
2686 | /* | |
2687 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2688 | * DHCPv6, MLD etc. can be run over the virtual link | |
2689 | */ | |
2690 | ||
2691 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2692 | { | |
2693 | struct inet6_dev *idev; | |
2694 | ||
2695 | ASSERT_RTNL(); | |
2696 | ||
e21e8467 | 2697 | idev = addrconf_add_dev(dev); |
64e724f6 | 2698 | if (IS_ERR(idev)) { |
91df42be | 2699 | pr_debug("init ip6-ip6: add_dev failed\n"); |
1da177e4 LT |
2700 | return; |
2701 | } | |
2702 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2703 | } |
2704 | ||
1ab1457c | 2705 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
8e5e8f30 | 2706 | void *data) |
1da177e4 LT |
2707 | { |
2708 | struct net_device *dev = (struct net_device *) data; | |
748e2d93 | 2709 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2710 | int run_pending = 0; |
b217d616 | 2711 | int err; |
1da177e4 | 2712 | |
e21e8467 | 2713 | switch (event) { |
45ba9dd2 | 2714 | case NETDEV_REGISTER: |
74235a25 | 2715 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2716 | idev = ipv6_add_dev(dev); |
2717 | if (!idev) | |
b217d616 | 2718 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2719 | } |
2720 | break; | |
bcdd553f | 2721 | |
1da177e4 | 2722 | case NETDEV_UP: |
3c21edbd | 2723 | case NETDEV_CHANGE: |
c2edacf8 JV |
2724 | if (dev->flags & IFF_SLAVE) |
2725 | break; | |
2726 | ||
3c21edbd | 2727 | if (event == NETDEV_UP) { |
f24e3d65 | 2728 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2729 | /* device is not ready yet. */ |
f3213831 | 2730 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2731 | dev->name); |
2732 | break; | |
2733 | } | |
99081049 | 2734 | |
d31c7b8f EP |
2735 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2736 | idev = ipv6_add_dev(dev); | |
2737 | ||
e3ec6cfc | 2738 | if (idev) { |
99081049 | 2739 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2740 | run_pending = 1; |
2741 | } | |
3c21edbd | 2742 | } else { |
f24e3d65 | 2743 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2744 | /* device is still not ready. */ |
2745 | break; | |
2746 | } | |
2747 | ||
2748 | if (idev) { | |
bcdd553f | 2749 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2750 | /* device is already configured. */ |
2751 | break; | |
3c21edbd YH |
2752 | idev->if_flags |= IF_READY; |
2753 | } | |
2754 | ||
f3213831 JP |
2755 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2756 | dev->name); | |
3c21edbd | 2757 | |
c5e33bdd | 2758 | run_pending = 1; |
3c21edbd YH |
2759 | } |
2760 | ||
e21e8467 | 2761 | switch (dev->type) { |
07a93626 | 2762 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2763 | case ARPHRD_SIT: |
2764 | addrconf_sit_config(dev); | |
2765 | break; | |
aee80b54 | 2766 | #endif |
07a93626 | 2767 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2768 | case ARPHRD_IPGRE: |
2769 | addrconf_gre_config(dev); | |
2770 | break; | |
0be669bb | 2771 | #endif |
1da177e4 LT |
2772 | case ARPHRD_TUNNEL6: |
2773 | addrconf_ip6_tnl_config(dev); | |
2774 | break; | |
2775 | case ARPHRD_LOOPBACK: | |
2776 | init_loopback(dev); | |
2777 | break; | |
2778 | ||
2779 | default: | |
2780 | addrconf_dev_config(dev); | |
2781 | break; | |
3ff50b79 | 2782 | } |
bcdd553f | 2783 | |
1da177e4 | 2784 | if (idev) { |
c5e33bdd YH |
2785 | if (run_pending) |
2786 | addrconf_dad_run(idev); | |
2787 | ||
bcdd553f SH |
2788 | /* |
2789 | * If the MTU changed during the interface down, | |
2790 | * when the interface up, the changed MTU must be | |
2791 | * reflected in the idev as well as routers. | |
1da177e4 | 2792 | */ |
bcdd553f SH |
2793 | if (idev->cnf.mtu6 != dev->mtu && |
2794 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2795 | rt6_mtu_change(dev, dev->mtu); |
2796 | idev->cnf.mtu6 = dev->mtu; | |
2797 | } | |
2798 | idev->tstamp = jiffies; | |
2799 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2800 | |
2801 | /* | |
2802 | * If the changed mtu during down is lower than | |
2803 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2804 | */ |
2805 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2806 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2807 | } |
2808 | break; | |
2809 | ||
2810 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2811 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2812 | rt6_mtu_change(dev, dev->mtu); |
2813 | idev->cnf.mtu6 = dev->mtu; | |
2814 | break; | |
2815 | } | |
2816 | ||
d31c7b8f EP |
2817 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2818 | idev = ipv6_add_dev(dev); | |
2819 | if (idev) | |
2820 | break; | |
2821 | } | |
2822 | ||
bcdd553f SH |
2823 | /* |
2824 | * MTU falled under IPV6_MIN_MTU. | |
2825 | * Stop IPv6 on this interface. | |
2826 | */ | |
1da177e4 LT |
2827 | |
2828 | case NETDEV_DOWN: | |
2829 | case NETDEV_UNREGISTER: | |
2830 | /* | |
2831 | * Remove all addresses from this interface. | |
2832 | */ | |
2833 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2834 | break; | |
3c21edbd | 2835 | |
1da177e4 | 2836 | case NETDEV_CHANGENAME: |
1da177e4 | 2837 | if (idev) { |
5632c515 | 2838 | snmp6_unregister_dev(idev); |
408c4768 | 2839 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2840 | addrconf_sysctl_register(idev); |
b217d616 HX |
2841 | err = snmp6_register_dev(idev); |
2842 | if (err) | |
2843 | return notifier_from_errno(err); | |
5632c515 | 2844 | } |
1da177e4 | 2845 | break; |
bcdd553f | 2846 | |
93d9b7d7 JP |
2847 | case NETDEV_PRE_TYPE_CHANGE: |
2848 | case NETDEV_POST_TYPE_CHANGE: | |
2849 | addrconf_type_change(dev, event); | |
75c78500 | 2850 | break; |
3ff50b79 | 2851 | } |
1da177e4 LT |
2852 | |
2853 | return NOTIFY_OK; | |
2854 | } | |
2855 | ||
2856 | /* | |
2857 | * addrconf module should be notified of a device going up | |
2858 | */ | |
2859 | static struct notifier_block ipv6_dev_notf = { | |
2860 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2861 | }; |
2862 | ||
93d9b7d7 | 2863 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2864 | { |
2865 | struct inet6_dev *idev; | |
2866 | ASSERT_RTNL(); | |
2867 | ||
2868 | idev = __in6_dev_get(dev); | |
2869 | ||
93d9b7d7 | 2870 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2871 | ipv6_mc_remap(idev); |
93d9b7d7 | 2872 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2873 | ipv6_mc_unmap(idev); |
2874 | } | |
2875 | ||
1da177e4 LT |
2876 | static int addrconf_ifdown(struct net_device *dev, int how) |
2877 | { | |
c346dca1 | 2878 | struct net *net = dev_net(dev); |
502a2ffd | 2879 | struct inet6_dev *idev; |
2880 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 2881 | int state, i; |
1da177e4 LT |
2882 | |
2883 | ASSERT_RTNL(); | |
2884 | ||
73a8bd74 DM |
2885 | rt6_ifdown(net, dev); |
2886 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
2887 | |
2888 | idev = __in6_dev_get(dev); | |
2889 | if (idev == NULL) | |
2890 | return -ENODEV; | |
2891 | ||
bcdd553f SH |
2892 | /* |
2893 | * Step 1: remove reference to ipv6 device from parent device. | |
2894 | * Do not dev_put! | |
1da177e4 | 2895 | */ |
439e2385 | 2896 | if (how) { |
1da177e4 | 2897 | idev->dead = 1; |
8814c4b5 YH |
2898 | |
2899 | /* protected by rtnl_lock */ | |
a9b3cd7f | 2900 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
2901 | |
2902 | /* Step 1.5: remove snmp6 entry */ | |
2903 | snmp6_unregister_dev(idev); | |
2904 | ||
2905 | } | |
2906 | ||
73a8bd74 DM |
2907 | /* Step 2: clear hash table */ |
2908 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
2909 | struct hlist_head *h = &inet6_addr_lst[i]; | |
2910 | struct hlist_node *n; | |
2911 | ||
2912 | spin_lock_bh(&addrconf_hash_lock); | |
2913 | restart: | |
2914 | hlist_for_each_entry_rcu(ifa, n, h, addr_lst) { | |
2915 | if (ifa->idev == idev) { | |
2916 | hlist_del_init_rcu(&ifa->addr_lst); | |
2917 | addrconf_del_timer(ifa); | |
2918 | goto restart; | |
2919 | } | |
2920 | } | |
2921 | spin_unlock_bh(&addrconf_hash_lock); | |
2922 | } | |
2923 | ||
1da177e4 LT |
2924 | write_lock_bh(&idev->lock); |
2925 | ||
bcdd553f | 2926 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2927 | if (!how) |
3c21edbd | 2928 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2929 | |
1da177e4 | 2930 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 2931 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2932 | in6_dev_put(idev); |
2933 | ||
bcdd553f | 2934 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2935 | while (!list_empty(&idev->tempaddr_list)) { |
2936 | ifa = list_first_entry(&idev->tempaddr_list, | |
2937 | struct inet6_ifaddr, tmp_list); | |
2938 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2939 | write_unlock_bh(&idev->lock); |
2940 | spin_lock_bh(&ifa->lock); | |
2941 | ||
2942 | if (ifa->ifpub) { | |
2943 | in6_ifa_put(ifa->ifpub); | |
2944 | ifa->ifpub = NULL; | |
2945 | } | |
2946 | spin_unlock_bh(&ifa->lock); | |
2947 | in6_ifa_put(ifa); | |
2948 | write_lock_bh(&idev->lock); | |
2949 | } | |
2950 | #endif | |
8f37ada5 | 2951 | |
502a2ffd | 2952 | while (!list_empty(&idev->addr_list)) { |
2953 | ifa = list_first_entry(&idev->addr_list, | |
2954 | struct inet6_ifaddr, if_list); | |
84e8b803 | 2955 | addrconf_del_timer(ifa); |
2956 | ||
73a8bd74 | 2957 | list_del(&ifa->if_list); |
84e8b803 | 2958 | |
73a8bd74 | 2959 | write_unlock_bh(&idev->lock); |
84e8b803 | 2960 | |
73a8bd74 DM |
2961 | spin_lock_bh(&ifa->state_lock); |
2962 | state = ifa->state; | |
2963 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
2964 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 2965 | |
73a8bd74 DM |
2966 | if (state != INET6_IFADDR_STATE_DEAD) { |
2967 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
2968 | atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); | |
27bdb2ab | 2969 | } |
73a8bd74 | 2970 | in6_ifa_put(ifa); |
8f37ada5 | 2971 | |
73a8bd74 DM |
2972 | write_lock_bh(&idev->lock); |
2973 | } | |
8f37ada5 | 2974 | |
1da177e4 LT |
2975 | write_unlock_bh(&idev->lock); |
2976 | ||
2977 | /* Step 5: Discard multicast list */ | |
439e2385 | 2978 | if (how) |
1da177e4 LT |
2979 | ipv6_mc_destroy_dev(idev); |
2980 | else | |
2981 | ipv6_mc_down(idev); | |
2982 | ||
1da177e4 | 2983 | idev->tstamp = jiffies; |
1ab1457c | 2984 | |
bcdd553f | 2985 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 2986 | if (how) { |
408c4768 | 2987 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
2988 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
2989 | neigh_ifdown(&nd_tbl, dev); | |
2990 | in6_dev_put(idev); | |
2991 | } | |
2992 | return 0; | |
2993 | } | |
2994 | ||
2995 | static void addrconf_rs_timer(unsigned long data) | |
2996 | { | |
2997 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
5b2a1953 | 2998 | struct inet6_dev *idev = ifp->idev; |
1da177e4 | 2999 | |
5b2a1953 | 3000 | read_lock(&idev->lock); |
3001 | if (idev->dead || !(idev->if_flags & IF_READY)) | |
1da177e4 LT |
3002 | goto out; |
3003 | ||
9ba2add3 | 3004 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3005 | goto out; |
3006 | ||
3007 | /* Announcement received after solicitation was sent */ | |
3008 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3009 | goto out; |
1da177e4 LT |
3010 | |
3011 | spin_lock(&ifp->lock); | |
5b2a1953 | 3012 | if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4 LT |
3013 | /* The wait after the last probe can be shorter */ |
3014 | addrconf_mod_timer(ifp, AC_RS, | |
5b2a1953 | 3015 | (ifp->probes == idev->cnf.rtr_solicits) ? |
3016 | idev->cnf.rtr_solicit_delay : | |
3017 | idev->cnf.rtr_solicit_interval); | |
1da177e4 LT |
3018 | spin_unlock(&ifp->lock); |
3019 | ||
5b2a1953 | 3020 | ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
3021 | } else { |
3022 | spin_unlock(&ifp->lock); | |
3023 | /* | |
3024 | * Note: we do not support deprecated "all on-link" | |
3025 | * assumption any longer. | |
3026 | */ | |
91df42be | 3027 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3028 | } |
3029 | ||
3030 | out: | |
5b2a1953 | 3031 | read_unlock(&idev->lock); |
1da177e4 LT |
3032 | in6_ifa_put(ifp); |
3033 | } | |
3034 | ||
3035 | /* | |
3036 | * Duplicate Address Detection | |
3037 | */ | |
3c21edbd YH |
3038 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3039 | { | |
3040 | unsigned long rand_num; | |
3041 | struct inet6_dev *idev = ifp->idev; | |
3042 | ||
95c385b4 NH |
3043 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3044 | rand_num = 0; | |
3045 | else | |
3046 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
3047 | ||
3c21edbd YH |
3048 | ifp->probes = idev->cnf.dad_transmits; |
3049 | addrconf_mod_timer(ifp, AC_DAD, rand_num); | |
3050 | } | |
3051 | ||
cf22f9a2 | 3052 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3053 | { |
3054 | struct inet6_dev *idev = ifp->idev; | |
3055 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3056 | |
3057 | addrconf_join_solict(dev, &ifp->addr); | |
3058 | ||
1da177e4 | 3059 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3060 | |
3061 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3062 | spin_lock(&ifp->lock); |
e9d3e084 | 3063 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3064 | goto out; |
1da177e4 LT |
3065 | |
3066 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3067 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3068 | !(ifp->flags&IFA_F_TENTATIVE) || |
3069 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3070 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3071 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3072 | read_unlock_bh(&idev->lock); |
3073 | ||
3074 | addrconf_dad_completed(ifp); | |
3075 | return; | |
3076 | } | |
3077 | ||
6732bade | 3078 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3079 | spin_unlock(&ifp->lock); |
6732bade | 3080 | read_unlock_bh(&idev->lock); |
3c21edbd | 3081 | /* |
590a9887 | 3082 | * If the device is not ready: |
3c21edbd YH |
3083 | * - keep it tentative if it is a permanent address. |
3084 | * - otherwise, kill it. | |
3085 | */ | |
3086 | in6_ifa_hold(ifp); | |
cc411d0b | 3087 | addrconf_dad_stop(ifp, 0); |
6732bade | 3088 | return; |
3c21edbd | 3089 | } |
95c385b4 NH |
3090 | |
3091 | /* | |
3092 | * Optimistic nodes can start receiving | |
3093 | * Frames right away | |
3094 | */ | |
e21e8467 | 3095 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
3096 | ip6_ins_rt(ifp->rt); |
3097 | ||
6732bade | 3098 | addrconf_dad_kick(ifp); |
1da177e4 | 3099 | out: |
622ccdf1 | 3100 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3101 | read_unlock_bh(&idev->lock); |
3102 | } | |
3103 | ||
3104 | static void addrconf_dad_timer(unsigned long data) | |
3105 | { | |
3106 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
3107 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
3108 | struct in6_addr mcaddr; |
3109 | ||
f2344a13 HX |
3110 | if (!ifp->probes && addrconf_dad_end(ifp)) |
3111 | goto out; | |
3112 | ||
122e4519 | 3113 | read_lock(&idev->lock); |
3114 | if (idev->dead || !(idev->if_flags & IF_READY)) { | |
3115 | read_unlock(&idev->lock); | |
1da177e4 LT |
3116 | goto out; |
3117 | } | |
21809faf | 3118 | |
3119 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3120 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3121 | spin_unlock(&ifp->lock); | |
3122 | read_unlock(&idev->lock); | |
3123 | goto out; | |
3124 | } | |
3125 | ||
1da177e4 LT |
3126 | if (ifp->probes == 0) { |
3127 | /* | |
3128 | * DAD was successful | |
3129 | */ | |
3130 | ||
cc411d0b | 3131 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3132 | spin_unlock(&ifp->lock); |
122e4519 | 3133 | read_unlock(&idev->lock); |
1da177e4 LT |
3134 | |
3135 | addrconf_dad_completed(ifp); | |
3136 | ||
3137 | goto out; | |
3138 | } | |
3139 | ||
3140 | ifp->probes--; | |
3141 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); | |
21809faf | 3142 | spin_unlock(&ifp->lock); |
122e4519 | 3143 | read_unlock(&idev->lock); |
1da177e4 LT |
3144 | |
3145 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3146 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3147 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3148 | out: |
3149 | in6_ifa_put(ifp); | |
3150 | } | |
3151 | ||
3152 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3153 | { | |
e21e8467 | 3154 | struct net_device *dev = ifp->idev->dev; |
1da177e4 LT |
3155 | |
3156 | /* | |
3157 | * Configure the address for reception. Now it is valid. | |
3158 | */ | |
3159 | ||
3160 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3161 | ||
026359bc TA |
3162 | /* If added prefix is link local and we are prepared to process |
3163 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3164 | */ |
3165 | ||
aeaf6e9d | 3166 | if (ipv6_accept_ra(ifp->idev) && |
1da177e4 LT |
3167 | ifp->idev->cnf.rtr_solicits > 0 && |
3168 | (dev->flags&IFF_LOOPBACK) == 0 && | |
3169 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
3170 | /* |
3171 | * If a host as already performed a random delay | |
3172 | * [...] as part of DAD [...] there is no need | |
3173 | * to delay again before sending the first RS | |
3174 | */ | |
f3ee4010 | 3175 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4 LT |
3176 | |
3177 | spin_lock_bh(&ifp->lock); | |
3178 | ifp->probes = 1; | |
3179 | ifp->idev->if_flags |= IF_RS_SENT; | |
3180 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); | |
3181 | spin_unlock_bh(&ifp->lock); | |
3182 | } | |
3183 | } | |
3184 | ||
e21e8467 SH |
3185 | static void addrconf_dad_run(struct inet6_dev *idev) |
3186 | { | |
c5e33bdd YH |
3187 | struct inet6_ifaddr *ifp; |
3188 | ||
3189 | read_lock_bh(&idev->lock); | |
502a2ffd | 3190 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3191 | spin_lock(&ifp->lock); |
f2344a13 HX |
3192 | if (ifp->flags & IFA_F_TENTATIVE && |
3193 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3194 | addrconf_dad_kick(ifp); | |
21809faf | 3195 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3196 | } |
3197 | read_unlock_bh(&idev->lock); | |
3198 | } | |
3199 | ||
1da177e4 LT |
3200 | #ifdef CONFIG_PROC_FS |
3201 | struct if6_iter_state { | |
3c40090a | 3202 | struct seq_net_private p; |
1da177e4 | 3203 | int bucket; |
1d578303 | 3204 | int offset; |
1da177e4 LT |
3205 | }; |
3206 | ||
1d578303 | 3207 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3208 | { |
3209 | struct inet6_ifaddr *ifa = NULL; | |
3210 | struct if6_iter_state *state = seq->private; | |
1218854a | 3211 | struct net *net = seq_file_net(seq); |
1d578303 | 3212 | int p = 0; |
1da177e4 | 3213 | |
1d578303 MM |
3214 | /* initial bucket if pos is 0 */ |
3215 | if (pos == 0) { | |
3216 | state->bucket = 0; | |
3217 | state->offset = 0; | |
3218 | } | |
3219 | ||
3220 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
c2e21293 | 3221 | struct hlist_node *n; |
4f70ecca | 3222 | hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket], |
1d578303 | 3223 | addr_lst) { |
9f0d3c27 ED |
3224 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3225 | continue; | |
1d578303 MM |
3226 | /* sync with offset */ |
3227 | if (p < state->offset) { | |
3228 | p++; | |
3229 | continue; | |
3230 | } | |
3231 | state->offset++; | |
9f0d3c27 | 3232 | return ifa; |
1d578303 MM |
3233 | } |
3234 | ||
3235 | /* prepare for next bucket */ | |
3236 | state->offset = 0; | |
3237 | p = 0; | |
1da177e4 | 3238 | } |
c2e21293 | 3239 | return NULL; |
1da177e4 LT |
3240 | } |
3241 | ||
c2e21293 | 3242 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3243 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3244 | { |
3245 | struct if6_iter_state *state = seq->private; | |
1218854a | 3246 | struct net *net = seq_file_net(seq); |
c2e21293 | 3247 | struct hlist_node *n = &ifa->addr_lst; |
1da177e4 | 3248 | |
1d578303 | 3249 | hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) { |
9f0d3c27 ED |
3250 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3251 | continue; | |
1d578303 | 3252 | state->offset++; |
9f0d3c27 | 3253 | return ifa; |
1d578303 | 3254 | } |
3c40090a | 3255 | |
c2e21293 | 3256 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3257 | state->offset = 0; |
4f70ecca | 3258 | hlist_for_each_entry_rcu_bh(ifa, n, |
c2e21293 | 3259 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3260 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3261 | continue; | |
1d578303 | 3262 | state->offset++; |
9f0d3c27 | 3263 | return ifa; |
c2e21293 | 3264 | } |
1da177e4 | 3265 | } |
3c40090a | 3266 | |
c2e21293 | 3267 | return NULL; |
1da177e4 LT |
3268 | } |
3269 | ||
1da177e4 | 3270 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3271 | __acquires(rcu_bh) |
1da177e4 | 3272 | { |
5c578aed | 3273 | rcu_read_lock_bh(); |
1d578303 | 3274 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3275 | } |
3276 | ||
3277 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3278 | { | |
3279 | struct inet6_ifaddr *ifa; | |
3280 | ||
3281 | ifa = if6_get_next(seq, v); | |
3282 | ++*pos; | |
3283 | return ifa; | |
3284 | } | |
3285 | ||
3286 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3287 | __releases(rcu_bh) |
1da177e4 | 3288 | { |
5c578aed | 3289 | rcu_read_unlock_bh(); |
1da177e4 LT |
3290 | } |
3291 | ||
3292 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3293 | { | |
3294 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3295 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3296 | &ifp->addr, |
1da177e4 LT |
3297 | ifp->idev->dev->ifindex, |
3298 | ifp->prefix_len, | |
3299 | ifp->scope, | |
3300 | ifp->flags, | |
3301 | ifp->idev->dev->name); | |
3302 | return 0; | |
3303 | } | |
3304 | ||
56b3d975 | 3305 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3306 | .start = if6_seq_start, |
3307 | .next = if6_seq_next, | |
3308 | .show = if6_seq_show, | |
3309 | .stop = if6_seq_stop, | |
3310 | }; | |
3311 | ||
3312 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3313 | { | |
3c40090a DL |
3314 | return seq_open_net(inode, file, &if6_seq_ops, |
3315 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3316 | } |
3317 | ||
9a32144e | 3318 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3319 | .owner = THIS_MODULE, |
3320 | .open = if6_seq_open, | |
3321 | .read = seq_read, | |
3322 | .llseek = seq_lseek, | |
3c40090a | 3323 | .release = seq_release_net, |
1da177e4 LT |
3324 | }; |
3325 | ||
2c8c1e72 | 3326 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3327 | { |
d4beaa66 | 3328 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3329 | return -ENOMEM; |
3330 | return 0; | |
3331 | } | |
3332 | ||
2c8c1e72 | 3333 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3334 | { |
ece31ffd | 3335 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3336 | } |
3337 | ||
3338 | static struct pernet_operations if6_proc_net_ops = { | |
3339 | .init = if6_proc_net_init, | |
3340 | .exit = if6_proc_net_exit, | |
3341 | }; | |
3342 | ||
3343 | int __init if6_proc_init(void) | |
3344 | { | |
3345 | return register_pernet_subsys(&if6_proc_net_ops); | |
3346 | } | |
3347 | ||
1da177e4 LT |
3348 | void if6_proc_exit(void) |
3349 | { | |
3c40090a | 3350 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3351 | } |
3352 | #endif /* CONFIG_PROC_FS */ | |
3353 | ||
07a93626 | 3354 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3355 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3356 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3357 | { |
3358 | int ret = 0; | |
c2e21293 | 3359 | struct inet6_ifaddr *ifp = NULL; |
3360 | struct hlist_node *n; | |
ddbe5032 | 3361 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3362 | |
5c578aed | 3363 | rcu_read_lock_bh(); |
4f70ecca | 3364 | hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3365 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3366 | continue; |
caad295f | 3367 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3368 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3369 | ret = 1; | |
3370 | break; | |
3371 | } | |
3372 | } | |
5c578aed | 3373 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3374 | return ret; |
3375 | } | |
3376 | #endif | |
3377 | ||
1da177e4 LT |
3378 | /* |
3379 | * Periodic address status verification | |
3380 | */ | |
3381 | ||
3382 | static void addrconf_verify(unsigned long foo) | |
3383 | { | |
b2db7564 | 3384 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3385 | struct inet6_ifaddr *ifp; |
c2e21293 | 3386 | struct hlist_node *node; |
1da177e4 LT |
3387 | int i; |
3388 | ||
5c578aed | 3389 | rcu_read_lock_bh(); |
3390 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3391 | now = jiffies; |
b2db7564 | 3392 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3393 | |
3394 | del_timer(&addr_chk_timer); | |
3395 | ||
bcdd553f | 3396 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3397 | restart: |
4f70ecca | 3398 | hlist_for_each_entry_rcu_bh(ifp, node, |
5c578aed | 3399 | &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3400 | unsigned long age; |
1da177e4 LT |
3401 | |
3402 | if (ifp->flags & IFA_F_PERMANENT) | |
3403 | continue; | |
3404 | ||
3405 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3406 | /* We try to batch several events at once. */ |
3407 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3408 | |
8f27ebb9 YH |
3409 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3410 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3411 | spin_unlock(&ifp->lock); |
3412 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3413 | ipv6_del_addr(ifp); |
3414 | goto restart; | |
8f27ebb9 YH |
3415 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3416 | spin_unlock(&ifp->lock); | |
3417 | continue; | |
1da177e4 | 3418 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3419 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3420 | int deprecate = 0; |
3421 | ||
3422 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3423 | deprecate = 1; | |
3424 | ifp->flags |= IFA_F_DEPRECATED; | |
3425 | } | |
3426 | ||
3427 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3428 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3429 | ||
3430 | spin_unlock(&ifp->lock); | |
3431 | ||
3432 | if (deprecate) { | |
3433 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3434 | |
3435 | ipv6_ifa_notify(0, ifp); | |
3436 | in6_ifa_put(ifp); | |
3437 | goto restart; | |
3438 | } | |
3439 | #ifdef CONFIG_IPV6_PRIVACY | |
3440 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3441 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3442 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3443 | ifp->idev->cnf.dad_transmits * | |
3444 | ifp->idev->nd_parms->retrans_time / HZ; | |
3445 | ||
1da177e4 LT |
3446 | if (age >= ifp->prefered_lft - regen_advance) { |
3447 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3448 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3449 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3450 | if (!ifp->regen_count && ifpub) { | |
3451 | ifp->regen_count++; | |
3452 | in6_ifa_hold(ifp); | |
3453 | in6_ifa_hold(ifpub); | |
3454 | spin_unlock(&ifp->lock); | |
5c578aed | 3455 | |
291d809b HY |
3456 | spin_lock(&ifpub->lock); |
3457 | ifpub->regen_count = 0; | |
3458 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3459 | ipv6_create_tempaddr(ifpub, ifp); |
3460 | in6_ifa_put(ifpub); | |
3461 | in6_ifa_put(ifp); | |
3462 | goto restart; | |
3463 | } | |
3464 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3465 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3466 | spin_unlock(&ifp->lock); | |
3467 | #endif | |
3468 | } else { | |
3469 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3470 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3471 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3472 | spin_unlock(&ifp->lock); | |
3473 | } | |
3474 | } | |
1da177e4 LT |
3475 | } |
3476 | ||
b2db7564 YH |
3477 | next_sec = round_jiffies_up(next); |
3478 | next_sched = next; | |
3479 | ||
3480 | /* If rounded timeout is accurate enough, accept it. */ | |
3481 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3482 | next_sched = next_sec; | |
3483 | ||
3484 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3485 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3486 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3487 | ||
3488 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3489 | now, next, next_sec, next_sched)); | |
3490 | ||
3491 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3492 | add_timer(&addr_chk_timer); |
5c578aed | 3493 | spin_unlock(&addrconf_verify_lock); |
3494 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3495 | } |
3496 | ||
461d8837 TG |
3497 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3498 | { | |
3499 | struct in6_addr *pfx = NULL; | |
3500 | ||
3501 | if (addr) | |
3502 | pfx = nla_data(addr); | |
3503 | ||
3504 | if (local) { | |
3505 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3506 | pfx = NULL; | |
3507 | else | |
3508 | pfx = nla_data(local); | |
3509 | } | |
3510 | ||
3511 | return pfx; | |
3512 | } | |
3513 | ||
ef7c79ed | 3514 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3515 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3516 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3517 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3518 | }; | |
3519 | ||
1da177e4 LT |
3520 | static int |
3521 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3522 | { | |
3b1e0a65 | 3523 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3524 | struct ifaddrmsg *ifm; |
3525 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3526 | struct in6_addr *pfx; |
b933f716 | 3527 | int err; |
1da177e4 | 3528 | |
b933f716 TG |
3529 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3530 | if (err < 0) | |
3531 | return err; | |
3532 | ||
3533 | ifm = nlmsg_data(nlh); | |
3534 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3535 | if (pfx == NULL) |
3536 | return -EINVAL; | |
3537 | ||
af284937 | 3538 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3539 | } |
3540 | ||
55ebaef1 NT |
3541 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3542 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3543 | { |
6f704992 YH |
3544 | u32 flags; |
3545 | clock_t expires; | |
4bed72e4 | 3546 | unsigned long timeout; |
46d48046 | 3547 | |
081bba5b NT |
3548 | if (!valid_lft || (prefered_lft > valid_lft)) |
3549 | return -EINVAL; | |
3550 | ||
4bed72e4 YH |
3551 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3552 | if (addrconf_finite_timeout(timeout)) { | |
3553 | expires = jiffies_to_clock_t(timeout * HZ); | |
3554 | valid_lft = timeout; | |
6f704992 | 3555 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3556 | } else { |
3557 | expires = 0; | |
3558 | flags = 0; | |
3559 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3560 | } |
081bba5b | 3561 | |
4bed72e4 YH |
3562 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3563 | if (addrconf_finite_timeout(timeout)) { | |
3564 | if (timeout == 0) | |
3565 | ifa_flags |= IFA_F_DEPRECATED; | |
3566 | prefered_lft = timeout; | |
3567 | } | |
081bba5b NT |
3568 | |
3569 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3570 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3571 | ifp->tstamp = jiffies; |
3572 | ifp->valid_lft = valid_lft; | |
3573 | ifp->prefered_lft = prefered_lft; | |
3574 | ||
3575 | spin_unlock_bh(&ifp->lock); | |
3576 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3577 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3578 | |
46d48046 | 3579 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3580 | expires, flags); |
081bba5b NT |
3581 | addrconf_verify(0); |
3582 | ||
3583 | return 0; | |
3584 | } | |
3585 | ||
1da177e4 LT |
3586 | static int |
3587 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
3588 | { | |
3b1e0a65 | 3589 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3590 | struct ifaddrmsg *ifm; |
3591 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3592 | struct in6_addr *pfx; |
7198f8ce TG |
3593 | struct inet6_ifaddr *ifa; |
3594 | struct net_device *dev; | |
55ebaef1 NT |
3595 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3596 | u8 ifa_flags; | |
461d8837 | 3597 | int err; |
1da177e4 | 3598 | |
461d8837 TG |
3599 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3600 | if (err < 0) | |
3601 | return err; | |
3602 | ||
3603 | ifm = nlmsg_data(nlh); | |
3604 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3605 | if (pfx == NULL) |
3606 | return -EINVAL; | |
3607 | ||
461d8837 | 3608 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3609 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3610 | |
3611 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3612 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3613 | preferred_lft = ci->ifa_prefered; |
3614 | } else { | |
3615 | preferred_lft = INFINITY_LIFE_TIME; | |
3616 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3617 | } |
3618 | ||
af284937 | 3619 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3620 | if (dev == NULL) |
3621 | return -ENODEV; | |
3622 | ||
55ebaef1 | 3623 | /* We ignore other flags so far. */ |
3b9f9a1c | 3624 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3625 | |
1cab3da6 | 3626 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3627 | if (ifa == NULL) { |
3628 | /* | |
3629 | * It would be best to check for !NLM_F_CREATE here but | |
3630 | * userspace alreay relies on not having to provide this. | |
3631 | */ | |
af284937 DL |
3632 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3633 | ifm->ifa_prefixlen, ifa_flags, | |
3634 | preferred_lft, valid_lft); | |
081bba5b NT |
3635 | } |
3636 | ||
7198f8ce TG |
3637 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3638 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3639 | err = -EEXIST; | |
3640 | else | |
55ebaef1 | 3641 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3642 | |
3643 | in6_ifa_put(ifa); | |
3644 | ||
3645 | return err; | |
1da177e4 LT |
3646 | } |
3647 | ||
101bb229 TG |
3648 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3649 | u8 scope, int ifindex) | |
3650 | { | |
3651 | struct ifaddrmsg *ifm; | |
3652 | ||
3653 | ifm = nlmsg_data(nlh); | |
3654 | ifm->ifa_family = AF_INET6; | |
3655 | ifm->ifa_prefixlen = prefixlen; | |
3656 | ifm->ifa_flags = flags; | |
3657 | ifm->ifa_scope = scope; | |
3658 | ifm->ifa_index = ifindex; | |
3659 | } | |
3660 | ||
85486af0 TG |
3661 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3662 | unsigned long tstamp, u32 preferred, u32 valid) | |
3663 | { | |
3664 | struct ifa_cacheinfo ci; | |
3665 | ||
18a31e1e TG |
3666 | ci.cstamp = cstamp_delta(cstamp); |
3667 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3668 | ci.ifa_prefered = preferred; |
3669 | ci.ifa_valid = valid; | |
3670 | ||
3671 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3672 | } | |
3673 | ||
101bb229 TG |
3674 | static inline int rt_scope(int ifa_scope) |
3675 | { | |
3676 | if (ifa_scope & IFA_HOST) | |
3677 | return RT_SCOPE_HOST; | |
3678 | else if (ifa_scope & IFA_LINK) | |
3679 | return RT_SCOPE_LINK; | |
3680 | else if (ifa_scope & IFA_SITE) | |
3681 | return RT_SCOPE_SITE; | |
3682 | else | |
3683 | return RT_SCOPE_UNIVERSE; | |
3684 | } | |
3685 | ||
0ab6803b TG |
3686 | static inline int inet6_ifaddr_msgsize(void) |
3687 | { | |
339bf98f TG |
3688 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3689 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3690 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3691 | } |
c5396a31 | 3692 | |
1da177e4 | 3693 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 3694 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3695 | { |
1da177e4 | 3696 | struct nlmsghdr *nlh; |
85486af0 | 3697 | u32 preferred, valid; |
1da177e4 | 3698 | |
15e47304 | 3699 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3700 | if (nlh == NULL) |
26932566 | 3701 | return -EMSGSIZE; |
0ab6803b | 3702 | |
101bb229 TG |
3703 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3704 | ifa->idev->dev->ifindex); | |
3705 | ||
1da177e4 | 3706 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3707 | preferred = ifa->prefered_lft; |
3708 | valid = ifa->valid_lft; | |
3709 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3710 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3711 | if (preferred > tval) |
3712 | preferred -= tval; | |
3713 | else | |
3714 | preferred = 0; | |
f56619fc BH |
3715 | if (valid != INFINITY_LIFE_TIME) { |
3716 | if (valid > tval) | |
3717 | valid -= tval; | |
3718 | else | |
3719 | valid = 0; | |
3720 | } | |
1da177e4 LT |
3721 | } |
3722 | } else { | |
85486af0 TG |
3723 | preferred = INFINITY_LIFE_TIME; |
3724 | valid = INFINITY_LIFE_TIME; | |
3725 | } | |
3726 | ||
0ab6803b | 3727 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
3728 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
3729 | nlmsg_cancel(skb, nlh); | |
3730 | return -EMSGSIZE; | |
3731 | } | |
1da177e4 | 3732 | |
0ab6803b | 3733 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3734 | } |
3735 | ||
3736 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 3737 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 3738 | { |
1da177e4 | 3739 | struct nlmsghdr *nlh; |
101bb229 TG |
3740 | u8 scope = RT_SCOPE_UNIVERSE; |
3741 | int ifindex = ifmca->idev->dev->ifindex; | |
3742 | ||
3743 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3744 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3745 | |
15e47304 | 3746 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3747 | if (nlh == NULL) |
26932566 | 3748 | return -EMSGSIZE; |
85486af0 | 3749 | |
0ab6803b TG |
3750 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3751 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3752 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3753 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3754 | nlmsg_cancel(skb, nlh); | |
3755 | return -EMSGSIZE; | |
3756 | } | |
85486af0 | 3757 | |
0ab6803b | 3758 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3759 | } |
3760 | ||
3761 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 3762 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3763 | { |
1da177e4 | 3764 | struct nlmsghdr *nlh; |
101bb229 TG |
3765 | u8 scope = RT_SCOPE_UNIVERSE; |
3766 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3767 | ||
3768 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3769 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3770 | |
15e47304 | 3771 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3772 | if (nlh == NULL) |
26932566 | 3773 | return -EMSGSIZE; |
85486af0 | 3774 | |
0ab6803b TG |
3775 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3776 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3777 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3778 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3779 | nlmsg_cancel(skb, nlh); | |
3780 | return -EMSGSIZE; | |
3781 | } | |
1da177e4 | 3782 | |
0ab6803b | 3783 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3784 | } |
3785 | ||
e21e8467 | 3786 | enum addr_type_t { |
1da177e4 LT |
3787 | UNICAST_ADDR, |
3788 | MULTICAST_ADDR, | |
3789 | ANYCAST_ADDR, | |
3790 | }; | |
3791 | ||
234b27c3 ED |
3792 | /* called with rcu_read_lock() */ |
3793 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3794 | struct netlink_callback *cb, enum addr_type_t type, | |
3795 | int s_ip_idx, int *p_ip_idx) | |
3796 | { | |
234b27c3 ED |
3797 | struct ifmcaddr6 *ifmca; |
3798 | struct ifacaddr6 *ifaca; | |
3799 | int err = 1; | |
3800 | int ip_idx = *p_ip_idx; | |
3801 | ||
3802 | read_lock_bh(&idev->lock); | |
3803 | switch (type) { | |
502a2ffd | 3804 | case UNICAST_ADDR: { |
3805 | struct inet6_ifaddr *ifa; | |
3806 | ||
234b27c3 | 3807 | /* unicast address incl. temp addr */ |
502a2ffd | 3808 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3809 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3810 | continue; |
3811 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 3812 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3813 | cb->nlh->nlmsg_seq, |
3814 | RTM_NEWADDR, | |
3815 | NLM_F_MULTI); | |
3816 | if (err <= 0) | |
3817 | break; | |
3818 | } | |
3819 | break; | |
502a2ffd | 3820 | } |
234b27c3 ED |
3821 | case MULTICAST_ADDR: |
3822 | /* multicast address */ | |
3823 | for (ifmca = idev->mc_list; ifmca; | |
3824 | ifmca = ifmca->next, ip_idx++) { | |
3825 | if (ip_idx < s_ip_idx) | |
3826 | continue; | |
3827 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 3828 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3829 | cb->nlh->nlmsg_seq, |
3830 | RTM_GETMULTICAST, | |
3831 | NLM_F_MULTI); | |
3832 | if (err <= 0) | |
3833 | break; | |
3834 | } | |
3835 | break; | |
3836 | case ANYCAST_ADDR: | |
3837 | /* anycast address */ | |
3838 | for (ifaca = idev->ac_list; ifaca; | |
3839 | ifaca = ifaca->aca_next, ip_idx++) { | |
3840 | if (ip_idx < s_ip_idx) | |
3841 | continue; | |
3842 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 3843 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3844 | cb->nlh->nlmsg_seq, |
3845 | RTM_GETANYCAST, | |
3846 | NLM_F_MULTI); | |
3847 | if (err <= 0) | |
3848 | break; | |
3849 | } | |
3850 | break; | |
3851 | default: | |
3852 | break; | |
3853 | } | |
3854 | read_unlock_bh(&idev->lock); | |
3855 | *p_ip_idx = ip_idx; | |
3856 | return err; | |
3857 | } | |
3858 | ||
1da177e4 LT |
3859 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3860 | enum addr_type_t type) | |
3861 | { | |
234b27c3 ED |
3862 | struct net *net = sock_net(skb->sk); |
3863 | int h, s_h; | |
1da177e4 LT |
3864 | int idx, ip_idx; |
3865 | int s_idx, s_ip_idx; | |
1da177e4 | 3866 | struct net_device *dev; |
234b27c3 ED |
3867 | struct inet6_dev *idev; |
3868 | struct hlist_head *head; | |
3869 | struct hlist_node *node; | |
1ab1457c | 3870 | |
234b27c3 ED |
3871 | s_h = cb->args[0]; |
3872 | s_idx = idx = cb->args[1]; | |
3873 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3874 | |
234b27c3 ED |
3875 | rcu_read_lock(); |
3876 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
3877 | idx = 0; | |
3878 | head = &net->dev_index_head[h]; | |
3879 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
3880 | if (idx < s_idx) | |
3881 | goto cont; | |
4b97efdf | 3882 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
3883 | s_ip_idx = 0; |
3884 | ip_idx = 0; | |
e21e8467 SH |
3885 | idev = __in6_dev_get(dev); |
3886 | if (!idev) | |
234b27c3 ED |
3887 | goto cont; |
3888 | ||
3889 | if (in6_dump_addrs(idev, skb, cb, type, | |
3890 | s_ip_idx, &ip_idx) <= 0) | |
3891 | goto done; | |
7562f876 | 3892 | cont: |
234b27c3 ED |
3893 | idx++; |
3894 | } | |
1da177e4 | 3895 | } |
234b27c3 ED |
3896 | done: |
3897 | rcu_read_unlock(); | |
3898 | cb->args[0] = h; | |
3899 | cb->args[1] = idx; | |
3900 | cb->args[2] = ip_idx; | |
3901 | ||
1da177e4 LT |
3902 | return skb->len; |
3903 | } | |
3904 | ||
3905 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3906 | { | |
3907 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 3908 | |
1da177e4 LT |
3909 | return inet6_dump_addr(skb, cb, type); |
3910 | } | |
3911 | ||
3912 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3913 | { | |
3914 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 3915 | |
1da177e4 LT |
3916 | return inet6_dump_addr(skb, cb, type); |
3917 | } | |
3918 | ||
3919 | ||
3920 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
3921 | { | |
3922 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 3923 | |
1da177e4 LT |
3924 | return inet6_dump_addr(skb, cb, type); |
3925 | } | |
3926 | ||
8e5e8f30 | 3927 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
1b29fc2c | 3928 | void *arg) |
6c223828 | 3929 | { |
3b1e0a65 | 3930 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
3931 | struct ifaddrmsg *ifm; |
3932 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
3933 | struct in6_addr *addr = NULL; |
3934 | struct net_device *dev = NULL; | |
3935 | struct inet6_ifaddr *ifa; | |
3936 | struct sk_buff *skb; | |
6c223828 NT |
3937 | int err; |
3938 | ||
1b29fc2c TG |
3939 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3940 | if (err < 0) | |
3941 | goto errout; | |
3942 | ||
3943 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
3944 | if (addr == NULL) { | |
3945 | err = -EINVAL; | |
3946 | goto errout; | |
6c223828 | 3947 | } |
6c223828 | 3948 | |
1b29fc2c | 3949 | ifm = nlmsg_data(nlh); |
6c223828 | 3950 | if (ifm->ifa_index) |
6fda7350 | 3951 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 3952 | |
e21e8467 SH |
3953 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
3954 | if (!ifa) { | |
1b29fc2c TG |
3955 | err = -EADDRNOTAVAIL; |
3956 | goto errout; | |
3957 | } | |
6c223828 | 3958 | |
e21e8467 SH |
3959 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
3960 | if (!skb) { | |
6c223828 | 3961 | err = -ENOBUFS; |
1b29fc2c | 3962 | goto errout_ifa; |
6c223828 NT |
3963 | } |
3964 | ||
15e47304 | 3965 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 3966 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
3967 | if (err < 0) { |
3968 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3969 | WARN_ON(err == -EMSGSIZE); | |
3970 | kfree_skb(skb); | |
3971 | goto errout_ifa; | |
3972 | } | |
15e47304 | 3973 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 3974 | errout_ifa: |
6c223828 | 3975 | in6_ifa_put(ifa); |
1b29fc2c | 3976 | errout: |
6c223828 | 3977 | return err; |
6c223828 NT |
3978 | } |
3979 | ||
1da177e4 LT |
3980 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
3981 | { | |
3982 | struct sk_buff *skb; | |
c346dca1 | 3983 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 3984 | int err = -ENOBUFS; |
1da177e4 | 3985 | |
0ab6803b | 3986 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
3987 | if (skb == NULL) |
3988 | goto errout; | |
3989 | ||
3990 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
3991 | if (err < 0) { |
3992 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
3993 | WARN_ON(err == -EMSGSIZE); | |
3994 | kfree_skb(skb); | |
3995 | goto errout; | |
3996 | } | |
1ce85fe4 PNA |
3997 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
3998 | return; | |
5d620266 TG |
3999 | errout: |
4000 | if (err < 0) | |
6fda7350 | 4001 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4002 | } |
4003 | ||
b6f99a21 | 4004 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4005 | __s32 *array, int bytes) |
4006 | { | |
04561c1f TG |
4007 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4008 | ||
1da177e4 LT |
4009 | memset(array, 0, bytes); |
4010 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4011 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4012 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4013 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4014 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4015 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4016 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4017 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4018 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4019 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4020 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4021 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 LT |
4022 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
4023 | #ifdef CONFIG_IPV6_PRIVACY | |
4024 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
4025 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4026 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4027 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4028 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
4029 | #endif | |
4030 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 4031 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4032 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4033 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4034 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4035 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4036 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4037 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4038 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4039 | #endif | |
930d6ff2 | 4040 | #endif |
fbea49e1 | 4041 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4042 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4043 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4044 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
4045 | #endif | |
7bc570c8 YH |
4046 | #ifdef CONFIG_IPV6_MROUTE |
4047 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4048 | #endif | |
778d80be | 4049 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4050 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4051 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4052 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
1da177e4 LT |
4053 | } |
4054 | ||
b382b191 TG |
4055 | static inline size_t inet6_ifla6_size(void) |
4056 | { | |
4057 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4058 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4059 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4060 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
4061 | + nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */ | |
4062 | } | |
4063 | ||
339bf98f TG |
4064 | static inline size_t inet6_if_nlmsg_size(void) |
4065 | { | |
4066 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4067 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4068 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4069 | + nla_total_size(4) /* IFLA_MTU */ | |
4070 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4071 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4072 | } |
c5396a31 | 4073 | |
be281e55 | 4074 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4075 | int items, int bytes) |
7f7d9a6b HX |
4076 | { |
4077 | int i; | |
4078 | int pad = bytes - sizeof(u64) * items; | |
4079 | BUG_ON(pad < 0); | |
4080 | ||
4081 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4082 | put_unaligned(items, &stats[0]); | |
4083 | for (i = 1; i < items; i++) | |
be281e55 | 4084 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4085 | |
4086 | memset(&stats[items], 0, pad); | |
4087 | } | |
4088 | ||
4ce3c183 ED |
4089 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
4090 | int items, int bytes, size_t syncpoff) | |
4091 | { | |
4092 | int i; | |
4093 | int pad = bytes - sizeof(u64) * items; | |
4094 | BUG_ON(pad < 0); | |
4095 | ||
4096 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4097 | put_unaligned(items, &stats[0]); | |
4098 | for (i = 1; i < items; i++) | |
4099 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4100 | ||
4101 | memset(&stats[items], 0, pad); | |
4102 | } | |
4103 | ||
7f7d9a6b HX |
4104 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4105 | int bytes) | |
4106 | { | |
e21e8467 | 4107 | switch (attrtype) { |
7f7d9a6b | 4108 | case IFLA_INET6_STATS: |
4ce3c183 ED |
4109 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
4110 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4111 | break; |
4112 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4113 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4114 | break; |
4115 | } | |
4116 | } | |
4117 | ||
b382b191 TG |
4118 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4119 | { | |
4120 | struct nlattr *nla; | |
4121 | struct ifla_cacheinfo ci; | |
4122 | ||
c78679e8 DM |
4123 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4124 | goto nla_put_failure; | |
b382b191 | 4125 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4126 | ci.tstamp = cstamp_delta(idev->tstamp); |
4127 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
4128 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); | |
c78679e8 DM |
4129 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4130 | goto nla_put_failure; | |
b382b191 TG |
4131 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4132 | if (nla == NULL) | |
4133 | goto nla_put_failure; | |
4134 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4135 | ||
4136 | /* XXX - MC not implemented */ | |
4137 | ||
4138 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4139 | if (nla == NULL) | |
4140 | goto nla_put_failure; | |
4141 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4142 | ||
4143 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4144 | if (nla == NULL) | |
4145 | goto nla_put_failure; | |
4146 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4147 | ||
4148 | return 0; | |
4149 | ||
4150 | nla_put_failure: | |
4151 | return -EMSGSIZE; | |
4152 | } | |
4153 | ||
4154 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4155 | { | |
4156 | if (!__in6_dev_get(dev)) | |
4157 | return 0; | |
4158 | ||
4159 | return inet6_ifla6_size(); | |
4160 | } | |
4161 | ||
4162 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4163 | { | |
4164 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4165 | ||
4166 | if (!idev) | |
4167 | return -ENODATA; | |
4168 | ||
4169 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4170 | return -EMSGSIZE; | |
4171 | ||
4172 | return 0; | |
4173 | } | |
4174 | ||
1ab1457c | 4175 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4176 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4177 | { |
04561c1f | 4178 | struct net_device *dev = idev->dev; |
04561c1f TG |
4179 | struct ifinfomsg *hdr; |
4180 | struct nlmsghdr *nlh; | |
4181 | void *protoinfo; | |
04561c1f | 4182 | |
15e47304 | 4183 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4184 | if (nlh == NULL) |
26932566 | 4185 | return -EMSGSIZE; |
04561c1f TG |
4186 | |
4187 | hdr = nlmsg_data(nlh); | |
4188 | hdr->ifi_family = AF_INET6; | |
4189 | hdr->__ifi_pad = 0; | |
4190 | hdr->ifi_type = dev->type; | |
4191 | hdr->ifi_index = dev->ifindex; | |
4192 | hdr->ifi_flags = dev_get_flags(dev); | |
4193 | hdr->ifi_change = 0; | |
4194 | ||
c78679e8 DM |
4195 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4196 | (dev->addr_len && | |
4197 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4198 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4199 | (dev->ifindex != dev->iflink && | |
4200 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4201 | goto nla_put_failure; | |
04561c1f TG |
4202 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4203 | if (protoinfo == NULL) | |
4204 | goto nla_put_failure; | |
1da177e4 | 4205 | |
b382b191 | 4206 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4207 | goto nla_put_failure; |
1da177e4 | 4208 | |
04561c1f TG |
4209 | nla_nest_end(skb, protoinfo); |
4210 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4211 | |
04561c1f | 4212 | nla_put_failure: |
26932566 PM |
4213 | nlmsg_cancel(skb, nlh); |
4214 | return -EMSGSIZE; | |
1da177e4 LT |
4215 | } |
4216 | ||
4217 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4218 | { | |
3b1e0a65 | 4219 | struct net *net = sock_net(skb->sk); |
84d2697d | 4220 | int h, s_h; |
434a8a58 | 4221 | int idx = 0, s_idx; |
1da177e4 LT |
4222 | struct net_device *dev; |
4223 | struct inet6_dev *idev; | |
84d2697d ED |
4224 | struct hlist_head *head; |
4225 | struct hlist_node *node; | |
1da177e4 | 4226 | |
84d2697d ED |
4227 | s_h = cb->args[0]; |
4228 | s_idx = cb->args[1]; | |
4229 | ||
4230 | rcu_read_lock(); | |
4231 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4232 | idx = 0; | |
4233 | head = &net->dev_index_head[h]; | |
4234 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { | |
4235 | if (idx < s_idx) | |
4236 | goto cont; | |
4237 | idev = __in6_dev_get(dev); | |
4238 | if (!idev) | |
4239 | goto cont; | |
4240 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4241 | NETLINK_CB(cb->skb).portid, |
84d2697d ED |
4242 | cb->nlh->nlmsg_seq, |
4243 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4244 | goto out; | |
7562f876 | 4245 | cont: |
84d2697d ED |
4246 | idx++; |
4247 | } | |
1da177e4 | 4248 | } |
84d2697d ED |
4249 | out: |
4250 | rcu_read_unlock(); | |
4251 | cb->args[1] = idx; | |
4252 | cb->args[0] = h; | |
1da177e4 LT |
4253 | |
4254 | return skb->len; | |
4255 | } | |
4256 | ||
4257 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4258 | { | |
4259 | struct sk_buff *skb; | |
c346dca1 | 4260 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4261 | int err = -ENOBUFS; |
1ab1457c | 4262 | |
339bf98f | 4263 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4264 | if (skb == NULL) |
4265 | goto errout; | |
4266 | ||
4267 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4268 | if (err < 0) { |
4269 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4270 | WARN_ON(err == -EMSGSIZE); | |
4271 | kfree_skb(skb); | |
4272 | goto errout; | |
4273 | } | |
5f75a104 | 4274 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4275 | return; |
8d7a76c9 TG |
4276 | errout: |
4277 | if (err < 0) | |
5f75a104 | 4278 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4279 | } |
4280 | ||
339bf98f TG |
4281 | static inline size_t inet6_prefix_nlmsg_size(void) |
4282 | { | |
4283 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4284 | + nla_total_size(sizeof(struct in6_addr)) | |
4285 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4286 | } | |
c5396a31 | 4287 | |
1da177e4 | 4288 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4289 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4290 | int event, unsigned int flags) |
1da177e4 | 4291 | { |
6051e2f4 TG |
4292 | struct prefixmsg *pmsg; |
4293 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4294 | struct prefix_cacheinfo ci; |
4295 | ||
15e47304 | 4296 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4297 | if (nlh == NULL) |
26932566 | 4298 | return -EMSGSIZE; |
6051e2f4 TG |
4299 | |
4300 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4301 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4302 | pmsg->prefix_pad1 = 0; |
4303 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4304 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4305 | pmsg->prefix_len = pinfo->prefix_len; | |
4306 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4307 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4308 | pmsg->prefix_flags = 0; |
4309 | if (pinfo->onlink) | |
4310 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4311 | if (pinfo->autoconf) | |
4312 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4313 | ||
c78679e8 DM |
4314 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4315 | goto nla_put_failure; | |
1da177e4 LT |
4316 | ci.preferred_time = ntohl(pinfo->prefered); |
4317 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4318 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4319 | goto nla_put_failure; | |
6051e2f4 | 4320 | return nlmsg_end(skb, nlh); |
1da177e4 | 4321 | |
6051e2f4 | 4322 | nla_put_failure: |
26932566 PM |
4323 | nlmsg_cancel(skb, nlh); |
4324 | return -EMSGSIZE; | |
1da177e4 LT |
4325 | } |
4326 | ||
1ab1457c | 4327 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4328 | struct prefix_info *pinfo) |
4329 | { | |
4330 | struct sk_buff *skb; | |
c346dca1 | 4331 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4332 | int err = -ENOBUFS; |
1da177e4 | 4333 | |
339bf98f | 4334 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4335 | if (skb == NULL) |
4336 | goto errout; | |
4337 | ||
4338 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4339 | if (err < 0) { |
4340 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4341 | WARN_ON(err == -EMSGSIZE); | |
4342 | kfree_skb(skb); | |
4343 | goto errout; | |
4344 | } | |
1ce85fe4 PNA |
4345 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4346 | return; | |
8c384bfa TG |
4347 | errout: |
4348 | if (err < 0) | |
6fda7350 | 4349 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4350 | } |
4351 | ||
1da177e4 LT |
4352 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4353 | { | |
4354 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); | |
4355 | ||
4356 | switch (event) { | |
4357 | case RTM_NEWADDR: | |
95c385b4 NH |
4358 | /* |
4359 | * If the address was optimistic | |
4360 | * we inserted the route at the start of | |
4361 | * our DAD process, so we don't need | |
4362 | * to do it again | |
4363 | */ | |
4364 | if (!(ifp->rt->rt6i_node)) | |
4365 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4366 | if (ifp->idev->cnf.forwarding) |
4367 | addrconf_join_anycast(ifp); | |
4368 | break; | |
4369 | case RTM_DELADDR: | |
4370 | if (ifp->idev->cnf.forwarding) | |
4371 | addrconf_leave_anycast(ifp); | |
4372 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
d8d1f30b | 4373 | dst_hold(&ifp->rt->dst); |
93fa159a | 4374 | |
73a8bd74 | 4375 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4376 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4377 | break; |
4378 | } | |
4379 | } | |
4380 | ||
4381 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4382 | { | |
8814c4b5 | 4383 | rcu_read_lock_bh(); |
1da177e4 LT |
4384 | if (likely(ifp->idev->dead == 0)) |
4385 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4386 | rcu_read_unlock_bh(); |
1da177e4 LT |
4387 | } |
4388 | ||
4389 | #ifdef CONFIG_SYSCTL | |
4390 | ||
4391 | static | |
8d65af78 | 4392 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4393 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4394 | { | |
4395 | int *valp = ctl->data; | |
4396 | int val = *valp; | |
88af182e | 4397 | loff_t pos = *ppos; |
013d97e9 | 4398 | ctl_table lctl; |
1da177e4 LT |
4399 | int ret; |
4400 | ||
013d97e9 FR |
4401 | /* |
4402 | * ctl->data points to idev->cnf.forwarding, we should | |
4403 | * not modify it until we get the rtnl lock. | |
4404 | */ | |
4405 | lctl = *ctl; | |
4406 | lctl.data = &val; | |
4407 | ||
4408 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4409 | |
c8fecf22 | 4410 | if (write) |
b325fddb | 4411 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4412 | if (ret) |
4413 | *ppos = pos; | |
1ab1457c | 4414 | return ret; |
1da177e4 LT |
4415 | } |
4416 | ||
56d417b1 BH |
4417 | static void dev_disable_change(struct inet6_dev *idev) |
4418 | { | |
4419 | if (!idev || !idev->dev) | |
4420 | return; | |
4421 | ||
4422 | if (idev->cnf.disable_ipv6) | |
4423 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4424 | else | |
4425 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4426 | } | |
4427 | ||
4428 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4429 | { | |
4430 | struct net_device *dev; | |
4431 | struct inet6_dev *idev; | |
4432 | ||
c6d14c84 ED |
4433 | rcu_read_lock(); |
4434 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4435 | idev = __in6_dev_get(dev); |
4436 | if (idev) { | |
4437 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4438 | idev->cnf.disable_ipv6 = newf; | |
4439 | if (changed) | |
4440 | dev_disable_change(idev); | |
4441 | } | |
56d417b1 | 4442 | } |
c6d14c84 | 4443 | rcu_read_unlock(); |
56d417b1 BH |
4444 | } |
4445 | ||
013d97e9 | 4446 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4447 | { |
4448 | struct net *net; | |
013d97e9 FR |
4449 | int old; |
4450 | ||
4451 | if (!rtnl_trylock()) | |
4452 | return restart_syscall(); | |
56d417b1 BH |
4453 | |
4454 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4455 | old = *p; |
4456 | *p = newf; | |
56d417b1 | 4457 | |
013d97e9 FR |
4458 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4459 | rtnl_unlock(); | |
56d417b1 | 4460 | return 0; |
88af182e | 4461 | } |
56d417b1 BH |
4462 | |
4463 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4464 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4465 | addrconf_disable_change(net, newf); | |
013d97e9 | 4466 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4467 | dev_disable_change((struct inet6_dev *)table->extra1); |
4468 | ||
4469 | rtnl_unlock(); | |
4470 | return 0; | |
4471 | } | |
4472 | ||
4473 | static | |
8d65af78 | 4474 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4475 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4476 | { | |
4477 | int *valp = ctl->data; | |
4478 | int val = *valp; | |
88af182e | 4479 | loff_t pos = *ppos; |
013d97e9 | 4480 | ctl_table lctl; |
56d417b1 BH |
4481 | int ret; |
4482 | ||
013d97e9 FR |
4483 | /* |
4484 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4485 | * not modify it until we get the rtnl lock. | |
4486 | */ | |
4487 | lctl = *ctl; | |
4488 | lctl.data = &val; | |
4489 | ||
4490 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4491 | |
4492 | if (write) | |
4493 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4494 | if (ret) |
4495 | *ppos = pos; | |
56d417b1 BH |
4496 | return ret; |
4497 | } | |
4498 | ||
1da177e4 LT |
4499 | static struct addrconf_sysctl_table |
4500 | { | |
4501 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4502 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4503 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4504 | .sysctl_header = NULL, |
4505 | .addrconf_vars = { | |
1ab1457c | 4506 | { |
e21e8467 SH |
4507 | .procname = "forwarding", |
4508 | .data = &ipv6_devconf.forwarding, | |
4509 | .maxlen = sizeof(int), | |
4510 | .mode = 0644, | |
4511 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4512 | }, |
4513 | { | |
e21e8467 SH |
4514 | .procname = "hop_limit", |
4515 | .data = &ipv6_devconf.hop_limit, | |
4516 | .maxlen = sizeof(int), | |
4517 | .mode = 0644, | |
4518 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4519 | }, |
4520 | { | |
e21e8467 SH |
4521 | .procname = "mtu", |
4522 | .data = &ipv6_devconf.mtu6, | |
4523 | .maxlen = sizeof(int), | |
4524 | .mode = 0644, | |
4525 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4526 | }, |
4527 | { | |
e21e8467 SH |
4528 | .procname = "accept_ra", |
4529 | .data = &ipv6_devconf.accept_ra, | |
4530 | .maxlen = sizeof(int), | |
4531 | .mode = 0644, | |
4532 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4533 | }, |
4534 | { | |
e21e8467 SH |
4535 | .procname = "accept_redirects", |
4536 | .data = &ipv6_devconf.accept_redirects, | |
4537 | .maxlen = sizeof(int), | |
4538 | .mode = 0644, | |
4539 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4540 | }, |
4541 | { | |
e21e8467 SH |
4542 | .procname = "autoconf", |
4543 | .data = &ipv6_devconf.autoconf, | |
4544 | .maxlen = sizeof(int), | |
4545 | .mode = 0644, | |
4546 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4547 | }, |
4548 | { | |
e21e8467 SH |
4549 | .procname = "dad_transmits", |
4550 | .data = &ipv6_devconf.dad_transmits, | |
4551 | .maxlen = sizeof(int), | |
4552 | .mode = 0644, | |
4553 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4554 | }, |
4555 | { | |
e21e8467 SH |
4556 | .procname = "router_solicitations", |
4557 | .data = &ipv6_devconf.rtr_solicits, | |
4558 | .maxlen = sizeof(int), | |
4559 | .mode = 0644, | |
4560 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4561 | }, |
4562 | { | |
e21e8467 SH |
4563 | .procname = "router_solicitation_interval", |
4564 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4565 | .maxlen = sizeof(int), | |
4566 | .mode = 0644, | |
4567 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4568 | }, |
4569 | { | |
e21e8467 SH |
4570 | .procname = "router_solicitation_delay", |
4571 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4572 | .maxlen = sizeof(int), | |
4573 | .mode = 0644, | |
4574 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4575 | }, |
4576 | { | |
e21e8467 SH |
4577 | .procname = "force_mld_version", |
4578 | .data = &ipv6_devconf.force_mld_version, | |
4579 | .maxlen = sizeof(int), | |
4580 | .mode = 0644, | |
4581 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4582 | }, |
4583 | #ifdef CONFIG_IPV6_PRIVACY | |
4584 | { | |
e21e8467 SH |
4585 | .procname = "use_tempaddr", |
4586 | .data = &ipv6_devconf.use_tempaddr, | |
4587 | .maxlen = sizeof(int), | |
4588 | .mode = 0644, | |
4589 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4590 | }, |
4591 | { | |
e21e8467 SH |
4592 | .procname = "temp_valid_lft", |
4593 | .data = &ipv6_devconf.temp_valid_lft, | |
4594 | .maxlen = sizeof(int), | |
4595 | .mode = 0644, | |
4596 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4597 | }, |
4598 | { | |
e21e8467 SH |
4599 | .procname = "temp_prefered_lft", |
4600 | .data = &ipv6_devconf.temp_prefered_lft, | |
4601 | .maxlen = sizeof(int), | |
4602 | .mode = 0644, | |
4603 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4604 | }, |
4605 | { | |
e21e8467 SH |
4606 | .procname = "regen_max_retry", |
4607 | .data = &ipv6_devconf.regen_max_retry, | |
4608 | .maxlen = sizeof(int), | |
4609 | .mode = 0644, | |
4610 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4611 | }, |
4612 | { | |
e21e8467 SH |
4613 | .procname = "max_desync_factor", |
4614 | .data = &ipv6_devconf.max_desync_factor, | |
4615 | .maxlen = sizeof(int), | |
4616 | .mode = 0644, | |
4617 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4618 | }, |
4619 | #endif | |
4620 | { | |
e21e8467 SH |
4621 | .procname = "max_addresses", |
4622 | .data = &ipv6_devconf.max_addresses, | |
4623 | .maxlen = sizeof(int), | |
4624 | .mode = 0644, | |
4625 | .proc_handler = proc_dointvec, | |
1da177e4 | 4626 | }, |
65f5c7c1 | 4627 | { |
e21e8467 SH |
4628 | .procname = "accept_ra_defrtr", |
4629 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4630 | .maxlen = sizeof(int), | |
4631 | .mode = 0644, | |
4632 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4633 | }, |
c4fd30eb | 4634 | { |
e21e8467 SH |
4635 | .procname = "accept_ra_pinfo", |
4636 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4637 | .maxlen = sizeof(int), | |
4638 | .mode = 0644, | |
4639 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4640 | }, |
930d6ff2 YH |
4641 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4642 | { | |
e21e8467 SH |
4643 | .procname = "accept_ra_rtr_pref", |
4644 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4645 | .maxlen = sizeof(int), | |
4646 | .mode = 0644, | |
4647 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4648 | }, |
52e16356 | 4649 | { |
e21e8467 SH |
4650 | .procname = "router_probe_interval", |
4651 | .data = &ipv6_devconf.rtr_probe_interval, | |
4652 | .maxlen = sizeof(int), | |
4653 | .mode = 0644, | |
4654 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4655 | }, |
fa03ef38 | 4656 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4657 | { |
e21e8467 SH |
4658 | .procname = "accept_ra_rt_info_max_plen", |
4659 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4660 | .maxlen = sizeof(int), | |
4661 | .mode = 0644, | |
4662 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4663 | }, |
4664 | #endif | |
930d6ff2 | 4665 | #endif |
fbea49e1 | 4666 | { |
e21e8467 SH |
4667 | .procname = "proxy_ndp", |
4668 | .data = &ipv6_devconf.proxy_ndp, | |
4669 | .maxlen = sizeof(int), | |
4670 | .mode = 0644, | |
4671 | .proc_handler = proc_dointvec, | |
fbea49e1 | 4672 | }, |
0bcbc926 | 4673 | { |
e21e8467 SH |
4674 | .procname = "accept_source_route", |
4675 | .data = &ipv6_devconf.accept_source_route, | |
4676 | .maxlen = sizeof(int), | |
4677 | .mode = 0644, | |
4678 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4679 | }, |
95c385b4 NH |
4680 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4681 | { | |
e21e8467 SH |
4682 | .procname = "optimistic_dad", |
4683 | .data = &ipv6_devconf.optimistic_dad, | |
4684 | .maxlen = sizeof(int), | |
4685 | .mode = 0644, | |
4686 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4687 | |
4688 | }, | |
7bc570c8 YH |
4689 | #endif |
4690 | #ifdef CONFIG_IPV6_MROUTE | |
4691 | { | |
e21e8467 SH |
4692 | .procname = "mc_forwarding", |
4693 | .data = &ipv6_devconf.mc_forwarding, | |
4694 | .maxlen = sizeof(int), | |
4695 | .mode = 0444, | |
4696 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4697 | }, |
95c385b4 | 4698 | #endif |
778d80be | 4699 | { |
e21e8467 SH |
4700 | .procname = "disable_ipv6", |
4701 | .data = &ipv6_devconf.disable_ipv6, | |
4702 | .maxlen = sizeof(int), | |
4703 | .mode = 0644, | |
4704 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 4705 | }, |
1b34be74 | 4706 | { |
e21e8467 SH |
4707 | .procname = "accept_dad", |
4708 | .data = &ipv6_devconf.accept_dad, | |
4709 | .maxlen = sizeof(int), | |
4710 | .mode = 0644, | |
4711 | .proc_handler = proc_dointvec, | |
1b34be74 | 4712 | }, |
f7734fdf | 4713 | { |
f7734fdf OP |
4714 | .procname = "force_tllao", |
4715 | .data = &ipv6_devconf.force_tllao, | |
4716 | .maxlen = sizeof(int), | |
4717 | .mode = 0644, | |
4718 | .proc_handler = proc_dointvec | |
4719 | }, | |
5cb04436 HFS |
4720 | { |
4721 | .procname = "ndisc_notify", | |
4722 | .data = &ipv6_devconf.ndisc_notify, | |
4723 | .maxlen = sizeof(int), | |
4724 | .mode = 0644, | |
4725 | .proc_handler = proc_dointvec | |
4726 | }, | |
1da177e4 | 4727 | { |
f8572d8f | 4728 | /* sentinel */ |
1da177e4 LT |
4729 | } |
4730 | }, | |
1da177e4 LT |
4731 | }; |
4732 | ||
bff16c2f | 4733 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 4734 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
4735 | { |
4736 | int i; | |
1da177e4 | 4737 | struct addrconf_sysctl_table *t; |
6105e293 | 4738 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 4739 | |
af879cc7 | 4740 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 4741 | if (t == NULL) |
f68635e6 PE |
4742 | goto out; |
4743 | ||
bcdd553f | 4744 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 4745 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 4746 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 4747 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 4748 | } |
1da177e4 | 4749 | |
6105e293 | 4750 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 4751 | |
6105e293 | 4752 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 4753 | if (t->sysctl_header == NULL) |
6105e293 | 4754 | goto free; |
f68635e6 PE |
4755 | |
4756 | p->sysctl = t; | |
95897312 | 4757 | return 0; |
1da177e4 | 4758 | |
f68635e6 | 4759 | free: |
1da177e4 | 4760 | kfree(t); |
f68635e6 | 4761 | out: |
95897312 | 4762 | return -ENOBUFS; |
1da177e4 LT |
4763 | } |
4764 | ||
408c4768 PE |
4765 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
4766 | { | |
4767 | struct addrconf_sysctl_table *t; | |
4768 | ||
4769 | if (p->sysctl == NULL) | |
4770 | return; | |
4771 | ||
4772 | t = p->sysctl; | |
4773 | p->sysctl = NULL; | |
ff538818 | 4774 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
4775 | kfree(t); |
4776 | } | |
4777 | ||
f52295a9 PE |
4778 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
4779 | { | |
54716e3b | 4780 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 4781 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 4782 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 4783 | idev, &idev->cnf); |
f52295a9 PE |
4784 | } |
4785 | ||
408c4768 | 4786 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 4787 | { |
408c4768 PE |
4788 | __addrconf_sysctl_unregister(&idev->cnf); |
4789 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
4790 | } |
4791 | ||
4792 | ||
4793 | #endif | |
4794 | ||
2c8c1e72 | 4795 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 PE |
4796 | { |
4797 | int err; | |
4798 | struct ipv6_devconf *all, *dflt; | |
4799 | ||
4800 | err = -ENOMEM; | |
4801 | all = &ipv6_devconf; | |
4802 | dflt = &ipv6_devconf_dflt; | |
4803 | ||
09ad9bc7 | 4804 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4805 | all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); |
4806 | if (all == NULL) | |
4807 | goto err_alloc_all; | |
4808 | ||
4809 | dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); | |
4810 | if (dflt == NULL) | |
4811 | goto err_alloc_dflt; | |
56d417b1 BH |
4812 | } else { |
4813 | /* these will be inherited by all namespaces */ | |
4814 | dflt->autoconf = ipv6_defaults.autoconf; | |
4815 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
4816 | } |
4817 | ||
4818 | net->ipv6.devconf_all = all; | |
4819 | net->ipv6.devconf_dflt = dflt; | |
4820 | ||
4821 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 4822 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
4823 | if (err < 0) |
4824 | goto err_reg_all; | |
4825 | ||
f8572d8f | 4826 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
4827 | if (err < 0) |
4828 | goto err_reg_dflt; | |
4829 | #endif | |
4830 | return 0; | |
4831 | ||
4832 | #ifdef CONFIG_SYSCTL | |
4833 | err_reg_dflt: | |
4834 | __addrconf_sysctl_unregister(all); | |
4835 | err_reg_all: | |
4836 | kfree(dflt); | |
4837 | #endif | |
4838 | err_alloc_dflt: | |
4839 | kfree(all); | |
4840 | err_alloc_all: | |
4841 | return err; | |
4842 | } | |
4843 | ||
2c8c1e72 | 4844 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
4845 | { |
4846 | #ifdef CONFIG_SYSCTL | |
4847 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
4848 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
4849 | #endif | |
09ad9bc7 | 4850 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
4851 | kfree(net->ipv6.devconf_dflt); |
4852 | kfree(net->ipv6.devconf_all); | |
4853 | } | |
4854 | } | |
4855 | ||
4856 | static struct pernet_operations addrconf_ops = { | |
4857 | .init = addrconf_init_net, | |
4858 | .exit = addrconf_exit_net, | |
4859 | }; | |
4860 | ||
1da177e4 LT |
4861 | /* |
4862 | * Device notifier | |
4863 | */ | |
4864 | ||
4865 | int register_inet6addr_notifier(struct notifier_block *nb) | |
4866 | { | |
1ab1457c | 4867 | return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4 | 4868 | } |
7159039a YH |
4869 | EXPORT_SYMBOL(register_inet6addr_notifier); |
4870 | ||
1da177e4 LT |
4871 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
4872 | { | |
e21e8467 | 4873 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4 | 4874 | } |
7159039a YH |
4875 | EXPORT_SYMBOL(unregister_inet6addr_notifier); |
4876 | ||
b382b191 TG |
4877 | static struct rtnl_af_ops inet6_ops = { |
4878 | .family = AF_INET6, | |
4879 | .fill_link_af = inet6_fill_link_af, | |
4880 | .get_link_af_size = inet6_get_link_af_size, | |
b382b191 TG |
4881 | }; |
4882 | ||
1da177e4 LT |
4883 | /* |
4884 | * Init / cleanup code | |
4885 | */ | |
4886 | ||
4887 | int __init addrconf_init(void) | |
4888 | { | |
c2e21293 | 4889 | int i, err; |
2a8cc6c8 | 4890 | |
e21e8467 SH |
4891 | err = ipv6_addr_label_init(); |
4892 | if (err < 0) { | |
f3213831 JP |
4893 | pr_crit("%s: cannot initialize default policy table: %d\n", |
4894 | __func__, err); | |
2cc6d2bf | 4895 | goto out; |
2a8cc6c8 | 4896 | } |
1da177e4 | 4897 | |
2cc6d2bf NH |
4898 | err = register_pernet_subsys(&addrconf_ops); |
4899 | if (err < 0) | |
4900 | goto out_addrlabel; | |
e0da5a48 | 4901 | |
1da177e4 LT |
4902 | /* The addrconf netdev notifier requires that loopback_dev |
4903 | * has it's ipv6 private information allocated and setup | |
4904 | * before it can bring up and give link-local addresses | |
4905 | * to other devices which are up. | |
4906 | * | |
4907 | * Unfortunately, loopback_dev is not necessarily the first | |
4908 | * entry in the global dev_base list of net devices. In fact, | |
4909 | * it is likely to be the very last entry on that list. | |
4910 | * So this causes the notifier registry below to try and | |
4911 | * give link-local addresses to all devices besides loopback_dev | |
4912 | * first, then loopback_dev, which cases all the non-loopback_dev | |
4913 | * devices to fail to get a link-local address. | |
4914 | * | |
4915 | * So, as a temporary fix, allocate the ipv6 structure for | |
4916 | * loopback_dev first by hand. | |
4917 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
4918 | * device and it being up should be removed. | |
4919 | */ | |
4920 | rtnl_lock(); | |
2774c7ab | 4921 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
4922 | err = -ENOMEM; |
4923 | rtnl_unlock(); | |
4924 | if (err) | |
e0da5a48 | 4925 | goto errlo; |
1da177e4 | 4926 | |
c2e21293 | 4927 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4928 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
4929 | ||
1da177e4 LT |
4930 | register_netdevice_notifier(&ipv6_dev_notf); |
4931 | ||
1da177e4 | 4932 | addrconf_verify(0); |
c127ea2c | 4933 | |
b382b191 TG |
4934 | err = rtnl_af_register(&inet6_ops); |
4935 | if (err < 0) | |
4936 | goto errout_af; | |
4937 | ||
c7ac8679 GR |
4938 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
4939 | NULL); | |
c127ea2c TG |
4940 | if (err < 0) |
4941 | goto errout; | |
4942 | ||
4943 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
4944 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
4945 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
4946 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
4947 | inet6_dump_ifaddr, NULL); | |
4948 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
4949 | inet6_dump_ifmcaddr, NULL); | |
4950 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
4951 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb ND |
4952 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
4953 | NULL, NULL); | |
c127ea2c | 4954 | |
2a8cc6c8 YH |
4955 | ipv6_addr_label_rtnl_register(); |
4956 | ||
1da177e4 | 4957 | return 0; |
c127ea2c | 4958 | errout: |
b382b191 TG |
4959 | rtnl_af_unregister(&inet6_ops); |
4960 | errout_af: | |
c127ea2c | 4961 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 PE |
4962 | errlo: |
4963 | unregister_pernet_subsys(&addrconf_ops); | |
2cc6d2bf NH |
4964 | out_addrlabel: |
4965 | ipv6_addr_label_cleanup(); | |
4966 | out: | |
c127ea2c | 4967 | return err; |
1da177e4 LT |
4968 | } |
4969 | ||
09f7709f | 4970 | void addrconf_cleanup(void) |
1da177e4 | 4971 | { |
176c39af | 4972 | struct net_device *dev; |
1da177e4 LT |
4973 | int i; |
4974 | ||
4975 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 4976 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 4977 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
4978 | |
4979 | rtnl_lock(); | |
4980 | ||
b382b191 TG |
4981 | __rtnl_af_unregister(&inet6_ops); |
4982 | ||
176c39af DL |
4983 | /* clean dev list */ |
4984 | for_each_netdev(&init_net, dev) { | |
4985 | if (__in6_dev_get(dev) == NULL) | |
4986 | continue; | |
4987 | addrconf_ifdown(dev, 1); | |
4988 | } | |
4989 | addrconf_ifdown(init_net.loopback_dev, 2); | |
4990 | ||
1da177e4 LT |
4991 | /* |
4992 | * Check hash table. | |
4993 | */ | |
5c578aed | 4994 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 4995 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
4996 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 4997 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
4998 | |
4999 | del_timer(&addr_chk_timer); | |
1da177e4 | 5000 | rtnl_unlock(); |
1da177e4 | 5001 | } |